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CN210489519U - Multifunctional gas density relay - Google Patents

Multifunctional gas density relay Download PDF

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Publication number
CN210489519U
CN210489519U CN201921464648.9U CN201921464648U CN210489519U CN 210489519 U CN210489519 U CN 210489519U CN 201921464648 U CN201921464648 U CN 201921464648U CN 210489519 U CN210489519 U CN 210489519U
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China
Prior art keywords
gas density
density relay
pressure
gas
valve
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CN201921464648.9U
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贺兵
常敏
廖海明
王乐乐
曾伟
金海生
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Shanghai Roye Electric Science and Technology Co Ltd
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Shanghai Roye Electric Science and Technology Co Ltd
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Abstract

The utility model provides a multi-functional gas density relay, including the casing, and locate base, pressure detector, temperature compensation component, at least one signal generator and equipment attach fitting in the casing still include: a pressure adjusting mechanism; and the gas circuit of the pressure regulating mechanism is communicated with the pressure detector, and the pressure regulating mechanism is configured to regulate the pressure rise and fall of the gas circuit of the gas density relay so as to enable the gas density relay to generate contact signal action. The multifunctional gas density relay is used for monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment, and meanwhile, the on-line check of the gas density relay is also completed, so that a maintainer does not need to arrive at the site, the efficiency is greatly improved, the operation and maintenance cost is reduced, and the safe operation of a power grid is guaranteed.

Description

Multifunctional gas density relay
Technical Field
The invention relates to the technical field of electric power, in particular to a multifunctional gas density relay applied to high-voltage and medium-voltage electrical equipment.
Background
The gas density relay is used for monitoring and controlling the density of insulating gas in high-voltage and medium-voltage electrical equipment, a contact signal control loop is arranged in the gas density relay, a gas path of the gas density relay is communicated with a gas chamber of the high-voltage and medium-voltage electrical equipment, when gas leakage is detected, a contact of the gas density relay acts to generate a contact signal, and the contact signal control loop gives an alarm or locks according to the contact signal, so that the safe operation protection of the electrical equipment is realized.
At present, SF6 (sulfur hexafluoride) electrical equipment is widely applied to electric power departments and industrial and mining enterprises, and rapid development of the electric power industry is promoted. In recent years, with the rapid development of economy, the capacity of a power system in China is rapidly expanded, and the usage amount of SF6 electrical equipment is more and more. The SF6 gas plays a role in arc extinction and insulation in high-voltage electrical equipment, and the safe operation of the SF6 high-voltage electrical equipment is seriously influenced if the density of the SF6 gas in the high-voltage electrical equipment is reduced and the micro water content is exceeded: 1) the reduction of SF6 gas density to some extent will result in loss of insulation and arc extinguishing properties. 2) Under the participation of some metal substances, SF6 gas can generate hydrolysis reaction with water at the high temperature of more than 200 ℃ to generate active HF and SOF2The insulation and metal parts are corroded and generate a large amount of heat, so that the pressure of the gas chamber is increased. 3) When the temperature is reduced, excessive moisture can form condensed water, so that the surface insulation strength of the insulation part is obviously reduced, and even flashover is caused, thereby causing serious harm. Grid operating regulations therefore mandate that the density and moisture content of SF6 gas must be periodically checked both before and during operation of the equipment.
With the development of the unattended transformer substation towards networking and digitization and the continuous enhancement of the requirements on remote control and remote measurement, the online monitoring of the gas density and micro-water content state of the SF6 electrical equipment has important practical significance. With the continuous and vigorous development of the intelligent power grid in China, intelligent high-voltage electrical equipment is used as an important component and a key node of an intelligent substation, and plays a significant role in improving the safety of the intelligent power grid. At present, most of high-voltage electrical equipment is SF6 gas insulation equipment, and if the gas density is reduced (caused by leakage and the like), the electrical performance of the equipment is seriously influenced, and serious hidden danger is caused to safe operation. Currently, it is very common to monitor gas density values in SF6 high-voltage electrical equipment on-line, and the existing gas density monitoring systems (gas density relays) are basically: 1) the remote transmission type SF6 gas density relay is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. 2) The gas density transmitter is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. The SF6 gas density relay is the core and key component. However, because the environment for the field operation of the high-voltage transformer substation is severe, especially the electromagnetic interference is very strong, in the currently used gas density monitoring system (gas density relay), the remote transmission type SF6 gas density relay is composed of a mechanical density relay and an electronic remote transmission part; in addition, the traditional mechanical density relay is reserved in a power grid system applying the gas density transmitter. The mechanical density relay is provided with one group, two groups or three groups of mechanical contacts, and when the pressure reaches the state of alarming, locking or overpressure, information is transmitted to a target equipment terminal in time through a contact connecting circuit, so that the safe operation of the equipment is ensured. Meanwhile, the monitoring system is also provided with a safe and reliable circuit transmission function, an effective platform is established for realizing real-time data remote data reading and information monitoring, and information such as pressure, temperature, density and the like can be transmitted to target equipment (such as a computer terminal) in time to realize online monitoring.
The gas density relay on the electrical equipment is regularly checked, which is a necessary measure for preventing the trouble in the bud and ensuring the safe and reliable operation of the electrical equipment; the 'electric power preventive test regulations' and the 'twenty-five key requirements for preventing serious accidents in electric power production' both require that the gas density relay be periodically checked. From the actual operation condition, the periodic verification of the gas density relay is one of the necessary means for ensuring the safe and reliable operation of the power equipment. Therefore, the calibration of the gas density relay has been regarded and popularized in the power system, and various power supply companies, power plants and large-scale industrial and mining enterprises have been implemented. And power supply companies, power plants and large-scale industrial and mining enterprises need to be equipped with testers, equipment vehicles and high-value SF6 gas for completing the field verification and detection work of the gas density relay. Including power failure and business loss during detection, the detection cost of each high-voltage switch station, which is allocated every year, is about tens of thousands to tens of thousands yuan. In addition, if the field check of the detection personnel is not standard in operation, potential safety hazards also exist. Therefore, it is necessary to innovate the existing gas density relay, so that the gas density relay for realizing the online gas density monitoring or the monitoring system formed by the gas density relay also has the checking function of the gas density relay, and further regular checking work of the (mechanical) gas density relay is completed, no maintainer is required to arrive at the site, the efficiency is greatly improved, and the cost is reduced. Meanwhile, the micro-water value in the gas chamber of the electrical equipment can be accurately measured in the online self-checking gas density relay or a monitoring system consisting of the gas density relay.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multi-functional gas density relay that high pressure or medium voltage electrical equipment used for solve when monitoring the gas density of the electrical equipment of gas insulation or arc extinguishing, still accomplish the online check-up to gas density relay, raise the efficiency, reduce the operation maintenance cost, guarantee electric wire netting safe operation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multi-functional gas density relay comprising: the casing, and locate base, pressure detector, temperature compensation component, at least one signal generator and the equipment attach fitting in the casing still include: a pressure adjusting mechanism;
and the gas circuit of the pressure regulating mechanism is communicated with the pressure detector, and the pressure regulating mechanism is configured to regulate the pressure rise and fall of the gas circuit of the gas density relay so as to enable the gas density relay to generate contact signal action, wherein the contact signal comprises alarm and/or locking.
Preferably, the base and the equipment connecting joint are of an integral structure.
Preferably, the pressure adjustment mechanism is provided on the equipment connection fitting, or is provided in the housing, or is provided on the housing.
Preferably, the signal generator includes: a microswitch or a magnetically assisted electrical contact.
Preferably, the pressure detector includes: a bourdon tube or a bellows tube.
Preferably, the temperature compensation element adopts a temperature compensation sheet or gas enclosed in the shell.
Preferably, the gas density relay includes, but is not limited to, a bimetal compensated gas density relay, a gas compensated gas density relay, a bimetal and gas compensated hybrid gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; the gas density relay with pointer display, the digital display type gas density relay and the gas density switch without display or indication; SF6 gas density relay, SF6 mixed gas density relay, N2 gas density relay.
Preferably, the pressure adjusting mechanism is manually adjusted, or automatically adjusted.
Preferably, the gas density relay outputs a contact signal through the signal generator.
Preferably, the gas density relay further comprises a pressure sensor, and a probe of the pressure sensor is mounted on a gas path of the gas density relay.
Preferably, the gas density relay further comprises an intelligent control unit connected with the pressure regulating mechanism and configured to complete control of the pressure regulating mechanism.
Preferably, the gas density relay further comprises a pressure sensor and an intelligent control unit, wherein a probe of the pressure sensor is installed on a gas path of the gas density relay, the intelligent control unit is respectively connected with the pressure adjusting mechanism and the pressure sensor and is configured to complete the control of the pressure adjusting mechanism and the collection of pressure values.
Preferably, the gas density relay further comprises a temperature sensor, and a probe of the temperature sensor is mounted on or outside the gas path of the gas density relay, or in the shell of the gas density relay, or outside the shell of the gas density relay.
Preferably, the gas density relay further comprises a pressure sensor and a temperature sensor; or, also include the gas density transmitter composed of pressure sensor and temperature pick-up; alternatively, a density measuring sensor of quartz tuning fork technology is also included.
The density measuring sensor of the quartz tuning fork technology is characterized in that the constant resonance frequency of a quartz oscillator in vacuum and the resonance frequency difference of a quartz oscillator which is in a same source in measured gas are in direct proportion to the density of the measured gas, and an analog signal or a digital signal of the gas density value is obtained after processing.
More preferably, the gas density relay, the pressure sensor and the temperature sensor are of an integrated structure; or the gas density relay, the pressure sensor and the temperature sensor are integrated to form a remote transmission type gas density relay.
Preferably, the gas density relay further comprises: and one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the base of the gas density relay.
More preferably, the valve is sealed within a chamber or housing.
More preferably, the valve and the pressure regulating mechanism are sealed within a single chamber or housing.
Preferably, the gas density relay further comprises: and the online check joint signal sampling unit is directly or indirectly connected with the gas density relay and is configured to sample the joint signal of the gas density relay at the ambient temperature.
Preferably, the gas density relay further comprises a display mechanism, the display mechanism comprises a movement, a pointer and a dial, the movement is fixed on the base or in the shell, the pointer is mounted on the movement and arranged in front of the dial, and the pointer is combined with the dial to display the gas density value; and/or the display mechanism comprises a digital device or a liquid crystal device with a display of the value.
Preferably, the gas density relay further comprises a pressure sensor, a temperature sensor, a valve, an online check contact signal sampling unit and an intelligent control unit; wherein,
one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the base; the pressure sensor is communicated with the pressure detector on a gas path; the gas path of the pressure regulating mechanism is communicated with the pressure detector; the online check contact signal sampling unit is respectively connected with the signal generator and the intelligent control unit and is configured to sample contact signals of the gas density relay at the ambient temperature; the intelligence accuse unit, respectively with pressure sensor temperature sensor pressure adjustment mechanism the valve with online check-up contact signal sampling unit is connected, is configured to control closing or opening of valve, accomplishes pressure adjustment mechanism's control, pressure value collection and temperature value collection and/or gas density value collection, and detect gas density relay's contact signal action value and/or contact signal return value accomplish gas density relay's check-up work on line.
More preferably, the gas density relay is provided with a rated pressure value output signal, and the rated pressure value output signal is connected with the intelligent control unit.
More preferably, the gas density relay measures a contact value (a pressure value during alarm and/or locking action) and/or a rated pressure value of the gas density relay at a working environment temperature, and automatically converts the contact value and/or the rated pressure value into a corresponding pressure value at 20 ℃, namely a gas density value, so that performance detection of a contact signal and/or the rated pressure value of the gas density relay is realized on line, and online verification work of the gas density relay is completed.
More preferably, be equipped with valve control delivery outlet, pressure adjustment mechanism control delivery outlet on the intelligence accuse unit, the intelligence accuse unit passes through valve control delivery outlet with the valve is linked together, the intelligence accuse unit passes through pressure adjustment mechanism control delivery outlet with pressure adjustment mechanism is linked together.
Specifically, the intelligent control unit closes the valve through a valve control output port, so that the gas density relay is isolated from the electrical equipment on a gas path; the intelligence is controlled the unit and is controlled the delivery outlet control through pressure adjustment mechanism adjusts the gas pressure and goes up and down for gas density relay takes place the contact signal action, and the contact signal action transmits the intelligence through online check-up contact signal sampling unit and controls the unit, and the intelligence is controlled the gas density value when the unit moves according to the contact signal, detects out gas density relay's contact signal action value and/or contact signal return value, accomplishes gas density relay's check-up work on line.
Furthermore, the gas density relay also monitors the gas density value, the pressure value and the temperature value of the electrical equipment on line, so that the gas density of the electrical equipment is monitored on line.
Preferably, the pressure regulating mechanism regulates the pressure to rise and fall, so that gas circulation is realized, and gas between the interior of the electrical equipment and the gas density relay flows.
Preferably, the gas density relay further comprises at least one sensor connector, and the gas density relay is connected with a micro-water sensor for monitoring the micro-water value of the gas on line through the sensor connector, and/or is connected with a decomposition product sensor for monitoring the decomposition product of the gas on line through the sensor connector.
More preferably, the pressure regulating mechanism regulates the pressure to rise and fall, realizes gas circulation, enables gas between the interior of the electrical equipment and the gas density relay to flow, and detects the micro water value of the gas in the electrical equipment.
For example, the pressure regulating mechanism comprises a capillary tube, a sealed chamber and a heating element, the gas flow is realized by heating the heating element, and the micro water value inside the gas in the electrical equipment is monitored on line.
Preferably, the gas density relay further comprises a multi-way joint, and the base, the pressure detector and the pressure adjusting mechanism of the gas density relay are arranged on the multi-way joint; or the equipment connecting joint and the pressure regulating mechanism of the gas density relay are arranged on the multi-way joint; or the equipment connecting joint, the base and the pressure adjusting mechanism of the gas density relay are arranged on the multi-way joint.
More preferably, the gas density relay further comprises a self-sealing valve, and the base of the gas density relay, the pressure detector and the self-sealing valve are installed on the multi-way connector.
Preferably, the gas density relay further comprises at least one connecting pipe, and the base, the pressure detector and the pressure adjusting mechanism of the gas density relay are connected together through the connecting pipe.
Preferably, during verification, the pressure adjusting mechanism is a closed air chamber, a heating element and/or a refrigerating element is arranged outside or inside the closed air chamber, and the temperature of the gas in the closed air chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the pressure of the gas density relay is increased or decreased.
More preferably, the heating element, and/or the cooling element is a semiconductor.
More preferably, the pressure adjusting mechanism further comprises a heat insulating member, and the heat insulating member is arranged outside the closed air chamber.
Preferably, during verification, the pressure adjusting mechanism is a cavity with an opening at one end, and the other end of the cavity is communicated with the gas path of the gas density relay; the cavity is internally provided with a piston, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod and then drives the piston to move in the cavity.
Preferably, during verification, the pressure adjusting mechanism is a closed air chamber, a piston is arranged in the closed air chamber, the piston is in sealing contact with the inner wall of the closed air chamber, a driving part is arranged outside the closed air chamber, and the driving part pushes the piston to move in the cavity through electromagnetic force.
Preferably, the pressure adjusting mechanism is an air bag with one end connected with a driving component, the air bag generates volume change under the driving of the driving component, and the air bag is communicated with the gas density relay.
Preferably, the pressure adjusting mechanism is a corrugated pipe, one end of the corrugated pipe is communicated with the gas density relay, and the other end of the corrugated pipe stretches under the driving of the driving part.
The driving component of the pressure adjusting mechanism includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or stepping motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.
Preferably, the pressure regulating mechanism is a purge valve.
More preferably, the pressure regulating mechanism further comprises a flow valve controlling the gas release flow rate.
More preferably, the air release valve is an electromagnetic valve or an electric valve, or other air release valves realized by electric or pneumatic means.
Preferably, the pressure regulating mechanism is a compressor.
Preferably, the pressure regulating mechanism is a pump. More preferably, the pump includes, but is not limited to, a pressurizing pump, an electric air pump, or an electromagnetic air pump.
Preferably, the pressure regulating mechanism is sealed within a chamber or housing.
The pressure regulating mechanism can slowly increase or decrease the load when the gas density relay is subjected to pressure increase or pressure reduction; when measuring the contact signal action value of the gas density relay, the load change speed is not more than 10 per second of the measuring range when approaching the action value, namely the pressure can be adjusted (can be steadily increased or decreased).
Preferably, the gas density relay further comprises: the display interface is used for man-machine interaction, displaying the current verification data in real time and/or supporting data input. Specifically, the method comprises real-time online gas density value display, pressure value display, temperature value display, change trend analysis, historical data query, real-time alarm and the like.
Preferably, the gas density relay realizes remote communication with the background monitoring terminal through communication equipment.
More preferably, the communication mode of the communication device is a wired communication mode or a wireless communication mode.
Further, the wired communication mode includes, but is not limited to, an RS232 BUS, an RS485 BUS, a CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, a coaxial cable, a PLC power carrier or a cable.
Further, the wireless communication mode includes, but is not limited to, a 5G/NB-IOT communication module (e.g., 5G, NB-IOT), a 2G/3G/4G/5G, WIFI, bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic, sound wave, satellite, light wave, quantum communication, or sonar, which are built in the sensor.
Preferably, the gas density relay further comprises a communication module for uploading data of each sensor through at least one communication mode. For example, uploading may be by wired upload, or by wireless upload, or by other means; the signals can be uploaded through the signal wire of the alarm contact, or independently uploaded, or uploaded together with other signals in a packaging mode.
Preferably, the gas density relay also monitors the state of a contact signal of the gas density relay.
Preferably, the gas density relay also monitors the state of a contact signal control loop of the gas density relay, such as disconnection or short circuit.
Compared with the prior art, the technical scheme of the utility model following beneficial effect has:
the utility model provides a multi-functional gas density relay that high pressure or medium voltage electrical equipment used, including the casing, locate base, pressure detector, temperature compensation component, at least one signal generator and equipment attach fitting in the casing still include pressure adjustment mechanism. The multifunctional gas density relay is used for monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment, and meanwhile, the on-line verification of the gas density relay is also completed, so that the efficiency is greatly improved, the operation and maintenance cost is reduced, and the safe operation of a power grid is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a multifunctional gas density relay according to a first embodiment;
fig. 2 is a schematic structural view of a multifunctional gas density relay according to a second embodiment;
FIG. 3 is a schematic diagram of a control circuit of a multifunctional gas density relay according to a third embodiment;
FIG. 4 is a schematic structural diagram of a multifunctional gas density relay according to a fourth embodiment;
FIG. 5 is a schematic structural view of a multifunctional gas density relay according to the fifth embodiment;
fig. 6 is a schematic structural view of a multifunctional gas density relay according to the sixth embodiment;
FIG. 7 is a schematic structural view of a multifunctional gas density relay according to the seventh embodiment;
fig. 8 is a schematic structural view of a multifunctional gas density relay according to the eighth embodiment;
FIG. 9 is a schematic structural view of a multifunctional gas density relay in accordance with the ninth embodiment;
fig. 10 is a schematic structural view of a multifunctional gas density relay according to the tenth embodiment;
fig. 11 is a schematic structural view of a multifunctional gas density relay according to an eleventh embodiment;
FIG. 12 is a schematic diagram of a multifunctional gas density relay of the twelfth embodiment;
fig. 13 is a schematic structural view of a multifunctional gas density relay according to a thirteenth embodiment;
FIG. 14 is a schematic structural view of a multi-functional gas density relay according to the fourteenth embodiment;
fig. 15 is a schematic structural view of a multifunctional gas density relay according to the fifteenth embodiment;
fig. 16 is a schematic view of a control circuit of a multifunctional gas density relay according to a sixteenth embodiment;
FIG. 17 is a schematic view of a control circuit of a multifunctional gas density relay according to the seventeenth embodiment;
FIG. 18 is a schematic diagram of a 4-20mA type density transmitter circuit on a gas density relay;
fig. 19 is a schematic structural view of a multifunctional gas density relay according to nineteenth embodiment.
Detailed Description
In order to make the purpose, technical scheme and effect of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention.
The first embodiment is as follows:
fig. 1 is a schematic view of a multifunctional gas density relay for high and medium voltage electrical equipment. As shown in fig. 1, the present embodiment provides a multifunctional gas density relay, including: the gas density relay comprises a gas density relay body 1 (comprising a shell 101, a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010) arranged in the shell 101, and further comprises a pressure adjusting mechanism 5, wherein a gas circuit of the pressure adjusting mechanism 5 is communicated with the pressure detector 103, the pressure adjusting mechanism 5 is configured to adjust the pressure rise and fall of the gas circuit of the gas density relay body 1, so that the gas density relay body 1 generates a contact signal action, and the contact signal comprises an alarm and/or a lock.
One end of the pressure detector 103 and one end of the temperature compensation element 104 are both fixed on the end seat 108, the other end of the pressure detector 103 is connected on the base 102, the other end of the temperature compensation element 104 is connected with the movement 105 through a display link or the other end of the temperature compensation element 104 is directly connected with the movement 105, and the pointer 106 is installed on the movement 105 and is arranged in front of the dial 107. The signal generator 109 can adopt a microswitch or a magnetic auxiliary electric contact, and the contact signal of the gas density relay is output through the signal generator 109. The pressure detector 103 may employ a bourdon tube or a bellows tube. The temperature compensation element 104 may be a compensation plate or a gas enclosed in the housing 101. The gas density relay of the present application may further include: an oil-filled type density relay, an oil-free type density relay, a gas density meter, a gas density switch, or a gas pressure gauge. In the gas density relay of the present embodiment, the varying pressure and temperature are corrected based on the pressure detector 103 and by the temperature compensation element 104 to reflect the variation in the (sulfur hexafluoride) gas density. Under the pressure of the measured medium (sulfur hexafluoride) gas, due to the action of the temperature compensation element 104, when the density value of the (sulfur hexafluoride) gas changes, the pressure value of the (sulfur hexafluoride) gas also changes correspondingly, so that the tail end of the pressure detector 103 is forced to generate corresponding elastic deformation displacement, the elastic deformation displacement is transmitted to the core 105 by virtue of the temperature compensation element 104, the core 105 transmits the elastic deformation displacement to the pointer 106, the density value of the measured sulfur hexafluoride gas is indicated on the dial 107, the signal generator 109 outputs an alarm locking contact signal, and thus the density value of the (sulfur hexafluoride) gas can be displayed by the gas density relay. If the density value of sulfur hexafluoride gas is reduced, the pressure detector 103 generates corresponding reverse displacement, the reverse displacement is transmitted to the movement 105 through the temperature compensation element 104, the movement 105 is transmitted to the pointer 106, the pointer 106 moves towards the direction with small indication value, the gas leakage degree is specifically displayed on the dial 107, and the density of sulfur hexafluoride gas in equipment such as an electrical switch and the like is monitored and controlled through a contact signal (alarm and/or locking) output by the signal generator 109, so that the electrical equipment can work safely. The valve 4 may be various and may be a cut-off valve, such as a ball valve, a butterfly valve, a gate valve, a stop valve, a plug valve, a butterfly valve, a needle valve, a diaphragm valve, etc. If the ball valve, the self-sealing valve core can be rotated to drive the ball valve to close the air passage of the switch device, and the self-sealing valve can be flexibly designed according to actual requirements. The valve 4 may be automatic or may be manually or semi-manually verified.
Example two:
as shown in fig. 2, the multifunctional gas density relay provided in this embodiment further includes: pressure sensor 2, temperature sensor 3, valve 4, online check-up contact signal sampling unit 6, intelligent control unit 7, multi-pass joint 9, tonifying qi interface 10. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is connected to the multi-way joint 9. The gas density relay body 1 (mainly comprises a shell 101, a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell) is arranged on the multi-way joint 9; the pressure sensor 2 is arranged on the multi-way connector 9, and the pressure sensor 2 is communicated with a pressure detector 103 of the gas density relay body 1 on a gas path; the pressure adjusting mechanism 5 is installed on the multi-way connector 9, and the pressure adjusting mechanism 5 is communicated with the pressure detector 103 of the gas density relay body 1. The online check contact signal sampling unit 6 is respectively connected with the signal generator 109 and the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
The pressure adjustment mechanism 5 of this embodiment is one end open-ended cavity, there is piston 51 (piston 51 is equipped with sealing washer 510) in the cavity, piston 51's one end is connected with an adjusting lever, drive unit 52 is connected to the outer end of adjusting lever, piston 51's the other end stretches into in the opening, and with the inner wall of cavity contacts, drive unit 52 drive adjust the pole and then drive piston 51 is in the intracavity removes. The driving member 52 includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or step motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.
The pressure adjusting mechanism 5 makes the driving part 52 push the piston 51 to make the sealed cavity generate volume change according to the control of the intelligent control unit 7, and then completes the pressure rise and fall. Through this pressure adjustment mechanism 5 regulated pressure, the contact action takes place for gas density relay body 1, the contact action is transmitted to intelligence through online check-up contact signal sampling unit 6 and is controlled unit 7, pressure value and temperature value when intelligence is controlled unit 7 and is moved according to the contact of gas density relay body 1 convert into corresponding gas density value, detect the warning of gas density relay body 1 and/or block contact action value and/or return value, accomplish gas density relay's check-up work.
Example three:
fig. 3 is a schematic diagram of a control circuit of a multifunctional gas density relay.
The online verification contact signal sampling unit 6 mainly completes contact signal sampling of the gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell). Namely, the basic requirements or functions of the online verification contact signal sampling unit 6 are as follows: 1) the safe operation of the electrical equipment is not influenced during the verification, namely the safe operation of the electrical equipment is not influenced when the contact signal of the gas density relay body 1 acts during the verification; 2) the contact signal control loop of the gas density relay body 1 does not influence the performance of the gas density relay, particularly does not influence the performance of the intelligent control unit 7, and does not cause the gas density relay to be damaged or influence the test work.
As shown in fig. 3, the online verification contact signal sampling unit 6 of the present embodiment is mainly composed of a relay J1(61) and a relay J2 (62). For the gas density relay with the contact signal of a normally open contact when the density pressure value is normal, two pairs of normally closed contacts J11 and J12 of the relay J1(61) are connected in series in a contact signal control loop of the gas density relay body 1; two pairs of normally open contacts J21 and J22 of the relay J2(62) are connected to the contacts of the gas density relay body 1. It can also be: wherein a pair of normally closed contacts J11 of the relay J1(61) are connected in series in the gas density relay contact signal control loop; a pair of normally open contacts J21 of the relay J2(62) are connected to the contacts of the gas density relay body 1; the relay J1(61) and the relay J2(62) may be integrated, that is, a relay having normally open and normally closed contacts. In short, the utility model can be used in a plurality of pairs, single and flexible combination. Referring to fig. 3, the intelligent control unit 7 mainly comprises a processor U1(71) and a power supply U2(72), and the processor U1(71) may be: general purpose computer, industrial computer, CPU, singlechip, ARM chip, AI chip, quantum chip, photon chip, MCU, FPGA, PLC etc., industrial control mainboard, embedded main control board etc. and other intelligent integrated circuit. The power source U2(72) may be: switching power supply, alternating current 220V, direct current power supply, LDO, programmable power supply, solar energy, storage battery, rechargeable battery, battery and the like. And the pressure sensor 2 of the pressure acquisition P may be: pressure sensors, pressure transmitters, and the like. The temperature sensor 3 of the temperature acquisition T may be: various temperature sensing elements such as temperature sensors and temperature transmitters. The valve (F)4 may be: solenoid valves, electric valves, pneumatic valves, ball valves, needle valves, regulating valves, shut-off valves, etc. can open and close the gas circuit and even the elements controlling the flow. The valve may be semi-automatic or may be a manual valve. The pressure adjusting mechanism (a)5 may be: electric regulating piston, electric regulating cylinder, booster pump, gas cylinder pressurization, valve, electromagnetic valve and flow controller. The pressure adjustment mechanism may be semi-automatic or may be manually adjusted.
The working principle of the multifunctional gas density relay checking and monitoring of the embodiment of the invention is as follows:
intelligent control unit7 monitoring the gas pressure P and the temperature T of the electrical equipment according to the pressure sensor 2 and the temperature sensor 3, and obtaining a corresponding 20 ℃ pressure value P according to the gas pressure-temperature characteristic20(i.e., gas density value). For example, for SF6For gases, the Betty-Bridgman equation can be used for calculation; for SF6For mixed gases, calculations can be made based on the law of dalton partial pressure, the Betty-Bridgman equation, the equation of state of the ideal gas.
When the gas density relay body 1 needs to be checked, if the gas density value P is detected at the moment20Not less than set safety check density value PSThe gas density relay sends out an instruction, namely the valve 4 is closed through the intelligent control unit 7, so that the gas density relay body 1 is isolated from the equipment connecting joint 1010 on the gas path.
Next, the intelligent control unit 7 controls to open the contact signal control loop of the gas density relay body 1, that is, the contacts J11 and J12 of the electromagnetic relay J1 of the online verification contact signal sampling unit 6 are opened, so that the safe operation of the electrical equipment is not affected when the gas density relay body 1 is verified online, and an alarm signal is not mistakenly sent or the control loop is locked when the gas density relay body is verified. Because the gas density value P is already carried out before the gas density relay body 1 starts to be verified20Not less than set safety check density value PSThe gas of the electrical equipment is in a safe operation range, and the gas leakage is a slow process and is safe during verification. Meanwhile, the intelligent control unit 7 is communicated with the contact sampling circuit of the gas density relay body 1, namely, the contacts J21 and J22 of the electromagnetic relay J2 of the online verification contact signal sampling unit 6 are closed, and at the moment, the contact P of the gas density relay body 1 is closedJIt is connected to the intelligent control unit 7 through the contacts J21 and J22 of the electromagnetic relay J2.
Then, the intelligent control unit 7 controls the driving part 52 of the pressure adjusting mechanism 5 (which can be realized mainly by a motor and a gear, and is various and flexible in manner), and then adjusts the piston 51 of the pressure adjusting mechanism 5, so that the sealed cavity composed of the piston 51, the pressure detector 103 of the gas density relay body 1, the valve 4, and the like is formedThe volume change occurs, the pressure of the gas of the pressure detector 103 of the gas density relay body 1 is gradually reduced, so that the gas density relay body 1 generates the contact action, the contact action is uploaded to the intelligent control unit 7 through the electromagnetic relay J2 of the online checking contact signal sampling unit 6, the intelligent control unit 7 measures the pressure value P and the temperature T value according to the contact action, and the pressure value P corresponding to the 20 ℃ is converted into the pressure value P according to the gas characteristics20(gas density value), the contact point action value P of the gas density relay body 1 can be detectedD20After the action values of the contact signals of the alarm and/or locking signals of the gas density relay body 1 are all detected, the intelligent control unit 7 controls the motor (motor or variable frequency motor) of the pressure adjusting mechanism 5 to adjust the piston 51 of the pressure adjusting mechanism 5, so that the pressure of the gas of the pressure detector 103 of the gas density relay body 1 is gradually increased, and the return value of the alarm and/or locking contact signals of the gas density relay body 1 is tested. The gas density relay body 1 can be repeatedly verified for a plurality of times (for example, 2 to 3 times) in this way, and then the average value thereof is calculated, thus completing the verification work.
After the verification is completed, the gas density relay body 1 sends out an instruction, the contact sampling circuit is disconnected through the intelligent control unit 7, namely, the contacts J21 and J22 of the electromagnetic relay J2 of the online verification contact signal sampling unit 6 are disconnected, and at the moment, the contact P of the gas density relay body 1JIt is no longer connected to the intelligent control unit 7. Meanwhile, the intelligent control unit 7 controls the valve 4 to be opened, so that the gas density relay body 1 is communicated with the equipment connecting joint 1010 on the gas path and further communicated with the electrical equipment. The instruction is sent again to gas density relay body 1, and the unit 7 communicates the contact signal control circuit of gas density relay body 1 through intelligence accuse, and the contact J11 and the J12 of the electromagnetic relay J1 of online check contact signal sampling unit 6 are closed promptly, and the density monitoring circuit of gas density relay body 1 normally works, makes gas density relay safety monitoring electrical equipment's gas density, and electrical equipment safe and reliable works. Therefore, the online checking work of the gas density relay body 1 can be conveniently completed, and the safe transportation of the electrical equipment can not be influenced when the gas density relay body 1 is checked onlineAnd (6) rows.
After the verification work of the gas density relay body 1 is completed, the gas density relay body is judged, the detection result can be informed, and the mode is flexible. Specifically, the method comprises the following steps: 1) can be annunciated in situ, such as by indicator lights, digital or liquid crystal displays, and the like; 2) or uploading can be implemented through an online remote transmission communication mode, for example, the data can be uploaded to a background monitoring terminal; 3) or uploading the data to a specific terminal through wireless uploading, for example, a mobile phone can be uploaded wirelessly; 4) or uploaded by another route; 5) or the abnormal result is uploaded through an alarm signal line or a special signal line; 6) uploading alone or in combination with other signals. In short, after the gas density relay completes the online verification work, if an abnormality occurs, an alarm can be automatically sent out, and the alarm can be uploaded to a remote end or can be sent to a designated receiver, for example, a mobile phone. Or, after the gas density relay completes the calibration work, if there is an abnormality, the intelligent control unit 7 can upload the alarm contact signal of the gas density relay body 1 to a remote end (a monitoring room, a background monitoring platform, etc.), and can also display a notice on site. The simple gas density relay on-line calibration can upload the result of abnormal calibration through an alarm signal line and upload the result according to a certain rule, for example, when the result is abnormal, a contact is connected in parallel with the alarm signal contact and is regularly closed and opened, and the condition can be obtained through analysis; or through a separate verification signal line. Specifically, the state can be uploaded well, or the state can be uploaded in case of problems, or the verification result can be uploaded through a single verification signal line, or can be displayed on site, can be alarmed on site, or can be uploaded in a wireless mode and can be uploaded through a smart phone network. The communication mode is wired or wireless, and the wired communication mode CAN be industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carrier and the like; the wireless communication mode can be 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar, a 5G/NB-IOT communication module with a built-in sensor (such as NB-IOT) and the like. In a word, the reliable performance of the gas density relay can be fully ensured in multiple modes and various combinations.
The gas density relay has a safety protection function, and particularly, when the gas density relay is lower than a set value, the gas density relay automatically does not perform online verification any more and sends an informing signal. For example, when the gas density value of the plant is less than the set value PSThen, it is not verified; only when the gas density value of the equipment is more than or equal to (the alarm pressure value is plus 0.02MPa), the online verification can be carried out.
The gas density relay may be checked on line according to a set time, or may be checked on line according to a set temperature (for example, a limit high temperature, a limit low temperature, a normal temperature, 20 degrees, etc.). When the environment temperature of high temperature, low temperature, normal temperature, 20 ℃ is checked on line, the error judgment requirements are different, for example, when the environment temperature of 20 ℃ is checked, the precision requirement of the gas density relay is 1.0 grade or 1.6 grade, and when the environment temperature is high, the precision requirement can be 2.5 grade. The method can be implemented according to the relevant standard according to the temperature requirement. For example, the accuracy requirement corresponding to each temperature value in 4.8 temperature compensation performance regulations in DL/T259 sulfur hexafluoride gas density relay calibration code is met.
The gas density relay can be used for comparing error performance of the gas density relay at different temperatures and different time periods. The comparison in different periods and the same temperature range judges the performance of the gas density relay and the electrical equipment, and the comparison in each period of history and the comparison between the history and the current are provided.
The gas density relay can be repeatedly verified for multiple times (for example, 2-3 times), and the average value of the gas density relay is calculated according to the verification result of each time. When necessary, the gas density relay can be checked on line at any time.
In the present embodiment, the types of the pressure sensor 2 include: absolute pressure sensors, relative pressure sensors, or both absolute and relative pressure sensors, may be several in number. The pressure sensor 2 may be in the form of a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil-induced pressure sensor (e.g., a pressure measurement sensor with an induction coil in the bawden tube), a resistive pressure sensor (e.g., a pressure measurement sensor with a slide wire resistor in the bawden tube), an analog pressure sensor, or a digital pressure sensor. The pressure sensor is a pressure sensor, a pressure transmitter, and other pressure-sensitive elements, such as diffused silicon, sapphire, piezoelectric, and strain gauge (resistance strain gauge, ceramic strain gauge). The temperature sensor may be: a thermocouple, a thermistor, a semiconductor type; the temperature sensor 3 can be contact type and non-contact type, sensor material and electronic element characteristics, and the temperature sensor 3 can be a thermal resistor and a thermocouple. In short, the temperature acquisition can be realized by various temperature sensing elements such as a temperature sensor, a temperature transmitter and the like. The gas density relay body 1 includes: the density relay with indication (density relay with pointer display, density relay with digital display, density relay with liquid crystal display) and the density relay without indication (density switch).
The gas density relay has the functions of pressure and temperature measurement and software conversion. On the premise of not influencing the safe operation of the electrical equipment, the alarm and/or locking contact action value and/or return value of the gas density relay body 1 can be detected on line. Of course, the return value of the alarm and/or latch contact signal may also be left untested as required.
The basic requirements or functions of the intelligent control unit 7 are as follows: the control of the valve 4, the control of the pressure regulating mechanism 5 and the signal acquisition are completed through the intelligent control unit 7. The realization is as follows: can detect the pressure value and temperature value when the contact signal of the gas density relay body 1 acts, and convert the pressure value and temperature value into the corresponding pressure value P at 20 DEG C20(gas density value), that is, the contact operating value P of the gas density relay body 1 can be detectedD20And the calibration work of the gas density relay body 1 is completed. Alternatively, the density value P at the time of the contact signal operation of the gas density relay body 1 can be directly detectedD20And the calibration work of the gas density relay body 1 is completed. Of course, the intelligent control unit 7 can also realize: completing test data storage; and/or test data derivation; and/or the test data may be printed; and/or carrying out data communication with an upper computer; and/or analog quantity and digital quantity information can be input; the intelligent control unit 7 further comprises a communication module, and the remote distance is realized through the communication moduleTransmitting information such as test data and/or verification results; when the rated pressure value output signal of gas density relay body 1, the density value at that time is gathered simultaneously to intelligence accuse unit 7, accomplishes the rated pressure value check-up of gas density relay body 1.
When the gas density relay finishes the check-up, can contrast the judgement automatically, if the error phase difference is big, will send unusual suggestion: the gas density relay itself has problems with pressure detectors, pressure sensors, temperature sensors, etc. Namely, the gas density relay can complete mutual verification of a pressure detector, a pressure sensor, a temperature sensor, a density transmitter and the like; the mutual verification of the pressure detector, the pressure sensor, the temperature sensor and the like of the pressure detector can be completed. After the gas density relay is checked, a check report can be automatically generated, and if the check report is abnormal, an alarm can be automatically sent out or sent to a specified receiver, for example, a mobile phone; the gas density value and the verification result are displayed on site or on the background, and the specific mode can be flexible; the system has the functions of real-time data display, change trend analysis, historical data query, real-time alarm and the like of gas linear density values, pressure values, temperature values and the like; the gas density value, or the gas density value, the pressure value and the temperature value can be monitored on line; the self-diagnosis function is provided, and abnormal and timely notices such as line breakage, short circuit alarm, sensor damage and the like can be notified; the performance of the gas density relay can be judged by comparing the error performance of the gas density relay at different temperatures and different time periods, namely comparing the error performance of the gas density relay at different periods and in the same temperature range. The comparison of each period with history and the comparison of the history and the present are carried out. The gas density relay can be subjected to self-examination; and judging whether the density values of the gas density relay and the monitored electrical equipment are normal or not. The density value of the electrical equipment, the pressure detector of the gas density relay, the pressure sensor, the temperature sensor and the like can be judged, analyzed and compared normally or abnormally, and the gas density monitoring of the electrical equipment, the judgment, the comparison and the analysis of the states of the gas density relay and the gas density relay are further realized; the gas density monitoring and analyzing system also comprises an analyzing system (expert management and analysis system) which is used for detecting, analyzing and judging the gas density value monitoring, the gas density relay and the monitoring element and knowing where the problem points are, whether the electric equipment or the gas density relay has problems; the contact signal state of the gas density relay is monitored, and the state is remotely transmitted. The contact signal state of the gas density relay can be known to be open or closed at the background, so that one more layer of monitoring is provided, and the reliability is improved; the temperature compensation performance of the gas density relay can be detected, or detected and judged; the contact resistance of the contact point of the gas density relay can be detected or detected and judged; the system has the functions of data analysis and data processing, and can carry out corresponding fault diagnosis and prediction on the electrical equipment.
As long as the data of the pressure sensor 2, the temperature sensor 3, the pressure detector 103, the temperature compensation element 104 and the like are consistent and normal, the gas density relay can be proved to be normal, so that the gas density relay does not need to be verified on site by maintenance personnel in a traditional mode, and the service life can be prolonged without manual verification. Unless the data of the pressure sensor 2, the temperature sensor 3, the pressure detector 103 of the gas density relay, the temperature compensation element 104 and the like of one electric device in the substation are inconsistent and abnormal, the maintenance personnel are arranged to process the data. And for anastomotic and normal conditions, manual verification is not needed, so that the reliability and efficiency can be greatly improved, and the cost is reduced.
Example four:
as shown in fig. 4, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7.
One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is connected to the base 102 of the gas density relay body 1. The pressure sensor 2, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged on the shell of the gas density relay body 1, and the pressure sensor 2 is communicated with the pressure detector 103 of the gas density relay body 1 on a gas path; the pressure adjusting mechanism 5 is communicated with a pressure detector 103 of the gas density relay body 1; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. And the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7.
Example five:
as shown in fig. 5, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7. The valve 4 is connected to the equipment connection joint 1010 at one end and to the base 102 at the other end. Pressure sensor 2, temperature sensor 3, online check-up contact signal sampling unit 6 and intelligent control unit 7 set up the casing rear side at gas density relay body 1. The pressure sensor 2 is communicated with a pressure detector 103 on a gas path through a base 102; the pressure adjusting mechanism 5 is communicated with the pressure detector of the gas density relay body 1. And the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7. Different from the second embodiment, the pressure sensor 2, the temperature sensor 3, the valve 4, and the pressure adjusting mechanism 5 are disposed on the rear side of the housing of the gas density relay body 1.
Example six:
as shown in fig. 6, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6, an intelligent control unit 7 and a connecting pipe 14. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, the other end of the valve 4 is communicated with the pressure detector 103 through the connecting pipe 14, and the pressure detector 103, the pressure sensor 2 and the pressure adjusting mechanism 5 are communicated on a gas path. The gas density relay body 1, the pressure sensor 2, the temperature sensor 3, the valve 4, the pressure adjusting mechanism 5, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged in a shell; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2 and the temperature sensor 3 are directly or indirectly connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
What distinguishes from the second embodiment is that 1) the gas density relay body 1, the pressure sensor 2, the temperature sensor 3, the valve 4, the pressure adjusting mechanism 5, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged in one housing. 2) The pressure adjustment mechanism 5 of the present embodiment is mainly composed of a piston 51 and a drive member 52. The piston 51 is hermetically connected with the pressure detector 103 and the pressure sensor 2 of the gas density relay body 1 to form a reliable sealed cavity. The pressure adjusting mechanism 5 makes the driving component 52 push the piston 51 to move according to the control of the intelligent control unit 7, so that the volume of the sealed cavity changes, and the pressure rise and fall are completed. 3) The pressure sensor 2 and the temperature sensor 3 are arranged in the shell, and can also be directly gas density transmitters which are combined together, so that the density value, the pressure value and the temperature value of the gas can be directly obtained. Through this 5 regulation of pressure adjustment mechanism for gas density relay body 1 takes place the contact action, and the contact action transmits intelligent accuse unit 7 through online check-up contact signal sampling unit 6, and intelligent accuse unit 7 is according to the density value when the contact of gas density relay moves, pressure value and temperature value even, detects gas density relay's warning and/or shutting contact action value and/or return value, accomplishes gas density relay's check-up work. Or only detecting the alarm and/or the action value of the locking contact of the gas density relay to finish the checking work of the gas density relay. As long as the data of the pressure detector 103, the pressure sensor 2 and the like of the gas density relay body 1 are consistent and normal, the gas density relay and the electrical equipment are normal, the gas density relay (or/and the transmitter) does not need to be verified on site manually, and the whole service life can be verified without manual verification. Unless the data of the pressure detector 103 and the pressure sensor 2 of the gas density relay of one of the electrical devices in the substation are inconsistent and abnormal, the maintenance personnel are not arranged to process the data.
Example seven:
as shown in fig. 7, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is communicated with the pressure detector 103. The gas density relay body 1, the temperature sensor 3, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2 is communicated with a pressure detector 103 of the gas density relay body 1 on a gas path; the pressure adjusting mechanism 5 is communicated with the pressure detector 103 of the gas density relay body 1 on the gas path. The pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with the intelligent control unit 7.
In contrast to the second embodiment, the pressure adjustment mechanism 5 of the present embodiment is mainly composed of the air bag 53 and the driving member 52. The pressure adjusting mechanism 5 makes the driving part 52 push the air bag 53 to change the volume according to the control of the intelligent control unit 7, thereby completing the pressure rise and fall.
Example eight:
as shown in fig. 8, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and a multi-way joint 9. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is connected to the multi-way joint 9. The gas density relay body 1 is arranged on the multi-way joint 9; the pressure sensor 2 is arranged on the multi-way connector 9, and the pressure sensor 2 is communicated with a pressure detector 103 of the gas density relay body 1 on a gas path; the pressure adjusting mechanism 5 is arranged on the multi-way connector 9, and the pressure adjusting mechanism 5 is communicated with a pressure detector 103 of the gas density relay; the temperature sensor 3, the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together and arranged on the multi-way joint 9; the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with the intelligent control unit 7.
The difference from the second embodiment is that: the pressure adjustment mechanism 5 of the present embodiment is mainly composed of a bellows 54 and a drive member 52. The bellows 54 is connected with the pressure detector 103 in a sealing manner to form a reliable sealed cavity. The pressure adjusting mechanism 5 is controlled by the intelligent control unit 7, so that the driving part 52 pushes the corrugated pipe 54 to change the volume, and further, the volume of the sealed cavity changes, and the pressure rise and fall are completed.
Example nine:
as shown in fig. 9, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is communicated with the pressure detector 103 of the gas density relay body 1. The pressure sensor 2 and the temperature sensor 3 are arranged on the gas density relay body 1, and the pressure sensor 2 is communicated with a pressure detector of the gas density relay body 1 on a gas path. The pressure adjusting mechanism 5 is communicated with a pressure detector of the gas density relay body 1. The pressure sensor 2 and the temperature sensor 3 are connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
In contrast to the first embodiment, the valve 4 is sealed inside the first housing 41, and the control cable of the valve 4 is led out through the first lead-out wire seal 42 sealed with the first housing 41, so that the design ensures that the valve 4 is sealed and can work reliably for a long time. The pressure adjusting mechanism 5 is sealed in the second shell 55, and a control cable of the pressure adjusting mechanism 5 is led out through a second outgoing line sealing part 56 sealed with the second shell 55, so that the pressure adjusting mechanism 5 is sealed and can work reliably for a long time. The second casing 55 and the first casing 41 may be integrated into one body.
Example ten:
as shown in fig. 10, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7. One end of the valve 4 is connected with the equipment connecting joint 1010, the other end of the valve 4 is connected with the pressure adjusting mechanism 5, and the pressure sensor 2 is arranged on the pressure adjusting mechanism 5. Temperature sensor 3, online check-up contact signal sampling unit 6, intelligent control unit 7, gas density relay body 1 set up on pressure adjustment mechanism 5. The pressure detector, the pressure sensor 2 and the pressure adjusting mechanism 5 of the gas density relay body 1 are communicated on a gas path. The temperature sensor 3, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. And the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7.
The pressure adjustment mechanism 5 of the present embodiment is mainly composed of a piston 51 and a drive member 52. One end of the piston 51 is hermetically connected with a pressure detector, a pressure sensor and the like of the gas density relay to form a reliable sealed cavity. The pressure adjusting mechanism 5 drives the piston 51 to move according to the control of the intelligent control unit 7, so that the volume of the sealed cavity changes, and the pressure rise and fall are completed. The driving part 52 is arranged outside the sealed cavity, the piston 51 is arranged inside the sealed cavity, and the driving part 52 uses electromagnetic force to push the piston 51 to move, namely the piston 51 is moved by the magnetic force between the piston 51 and the driving part 52. Through this pressure adjustment mechanism regulated pressure like this for the action of contact takes place for gas density relay, and the contact action is transmitted to intelligence through online check-up contact signal sampling unit 6 and is controlled unit 7, and intelligence is controlled unit 7 density value when the contact according to gas density relay moves, pressure value and temperature value even, detects gas density relay's warning and/or shutting contact action value and/or return value, accomplishes gas density relay's check-up work. Or the checking work of the gas density relay is completed as long as the alarm and/or the locking contact action value of the gas density relay is detected.
Example eleven:
as shown in fig. 11, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and a multi-way joint 9. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is connected to the multi-way joint 9. The gas density relay body 1, the pressure sensor 2, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged on the multi-way connector 9; the pressure sensor 2 is in communication with the pressure detector 103 of the gas density relay body 1 on the gas path. The pressure adjusting mechanism 5 is installed on the multi-way connector 9, and the pressure adjusting mechanism 5 is communicated with the pressure detector 103 of the gas density relay body 1. The online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. The temperature sensor 3 is disposed near the gas density relay body 1, or near the temperature compensation element 104 inside its housing 101. The pressure sensor 2 and the temperature sensor 3 are connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
The obvious difference from the second embodiment is that the pressure adjusting mechanism 5 of the present embodiment mainly comprises an air chamber 57, a heating element 58 and a heat insulating member 59. The air chamber 57 is externally (or internally) provided with a heating element 58, and the temperature is changed by heating, so that the pressure is increased or decreased. Through this pressure adjustment mechanism 5 regulated pressure for gas density relay body 1 takes place the contact action, and the contact action transmits intelligent accuse unit 7 through online check-up contact signal sampling unit 6, and pressure value and temperature value when intelligent accuse unit 7 moves according to the contact of gas density relay body 1 convert into corresponding density value, detect the warning of gas density relay body 1 and/or block contact action value and/or return value, accomplish gas density relay's check-up work.
The working principle of the multifunctional gas density relay of the embodiment is as follows: when the density relay needs to be checked, the device sends an instruction to heat the heating element 58 of the pressure adjusting mechanism 5, and when the temperature difference between the temperature value of the pressure adjusting mechanism 5 and the temperature value of the temperature sensor 3 reaches a set value, the device sends an instruction, namely the valve 4 can be closed through the intelligent control unit 7, so that the gas density relay body 1 is isolated from the equipment connecting joint 1010 on a gas path and further isolated from the electrical equipment; and then immediately turning off the heating element 58 of the pressure adjusting mechanism 5, stopping heating the heating element 58, gradually reducing the pressure of the gas in the closed gas chamber 57 of the pressure adjusting mechanism 5, so that the gas density relay generates an alarm and/or locking contact signal action, transmitting the contact signal action to the intelligent control unit 7 through the online checking contact signal sampling unit 6, and detecting the alarm and/or locking contact signal action value and/or return value of the gas density relay by the intelligent control unit 7 according to the gas density value during the alarm and/or locking contact action, thereby completing the checking work of the gas density relay.
Example twelve:
as shown in fig. 12, a multifunctional gas density relay includes: the gas density relay body 1 (mainly also includes a housing 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connection joint 1010 which are arranged in the housing), a first pressure sensor 21, a second pressure sensor 22, a first temperature sensor 31, a second temperature sensor 32, a valve 4, a pressure adjusting mechanism 5, an online check contact signal sampling unit 6 and an intelligent control unit 7. In operation, one end of the device connection joint 1010 is hermetically connected to the gas-insulated electrical device, the other end of the device connection joint 1010 is communicated with the valve 4, and the other end of the valve 4 is communicated with the pressure regulating mechanism 5. The gas density relay body 1, the first temperature sensor 31, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged together and are arranged on the pressure adjusting mechanism 5; the first pressure sensor 21 is provided on the pressure adjustment mechanism 5. The second pressure sensor 22 and the second temperature sensor 32 are provided on the side of the device connection joint 1010 (the side of the valve 4 connected to the device connection joint 1010). The first pressure sensor 21 and the pressure detector of the gas density relay body 1 are communicated with the pressure adjusting mechanism 5 on a gas path; the first pressure sensor 21, the second pressure sensor 22, the first temperature sensor 31 and the second temperature sensor 32 are connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
Different from the second embodiment, there are two pressure sensors, that is, a first pressure sensor 21 and a second pressure sensor 22; the number of the temperature sensors is two, namely a first temperature sensor 31 and a second temperature sensor 32. The second temperature sensor 32 may also be omitted in this embodiment. The multifunctional gas density relay of the embodiment is provided with a plurality of pressure sensors and temperature sensors, and pressure values obtained by monitoring of the pressure sensors can be compared and verified with one another; the temperature values obtained by the plurality of temperature sensors can be compared and verified mutually; the corresponding gas density values obtained by monitoring the pressure sensors and the temperature sensors can be compared and verified with each other; even the density value Pe of the rated pressure value of the gas density relay can be obtained through online verification20And comparing and checking each other.
As long as the data among a plurality of pressure sensors, a plurality of temperature sensors, the gas density relay coincide, normal, just can show that the gas density relay is normal, need not artifical to go on the scene to the gas density relay check-up, can the full life exempt from artifical check-up. Unless the data of the pressure sensor, the temperature sensor and the gas density relay of a certain electric device in the transformer substation are inconsistent and abnormal, maintenance personnel are arranged to process the data, and the data are consistent and normal without checking.
Example thirteen:
as shown in fig. 13, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and a multi-way joint 9. One end of the valve 4 is hermetically connected to the equipment connecting joint 1010, and the other end of the valve 4 is connected to the multi-way joint 9. The gas density relay body 1 is arranged on the multi-way joint 9; pressure sensor 2, temperature sensor 3, online check-up contact signal sampling unit 6, intelligent control unit 7, gas density relay body 1 set up together. The pressure sensor 2 is communicated with a pressure detector of the gas density relay body 1 on a gas path; the pressure adjusting mechanism 5 is installed on the multi-way connector 9, and the pressure adjusting mechanism 5 is communicated with the pressure detector 103 of the gas density relay body 1. The pressure sensor 2 and the temperature sensor 3 are connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
In contrast to the second embodiment, the pressure adjustment mechanism 5 of the present embodiment is mainly composed of a solenoid valve and a second housing 55. The pressure regulating mechanism 5 controls the intelligent control unit 7 to open the electromagnetic valve, so that pressure changes and pressure rise and fall are completed. Through this pressure adjustment mechanism 5 (solenoid valve) regulated pressure for the action of contact takes place for gas density relay, and the contact action is transmitted to intelligence through online check-up contact signal sampling unit 6 and is controlled unit 7, and the unit 7 is controlled to intelligence according to pressure value and temperature value when gas density relay's contact action, converts into corresponding density value, detects gas density relay's warning and/or shutting contact action value. After gas density relay's contact action value check-up was accomplished, unit 7 is just closed to intelligence accuse, then open valve 4, take place pressure variation, and then realize the rising of pressure, make gas density relay take place the contact and reset, the contact resets and transmits intelligence accuse unit 7 through online check-up contact signal sampling unit 6, pressure value and temperature value when intelligence accuse unit 7 resets (returns) according to gas density relay's contact, convert into corresponding density value, detect the warning of gas density relay body 1 and/or shutting contact return value, and then accomplish gas density relay's check-up work.
Example fourteen:
as shown in fig. 14, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking joint signal sampling unit 6, an intelligent control unit 7, a multi-way joint 9, a micro-water sensor 13 and a decomposition product sensor 15. When the gas insulated electric equipment is in operation, one end of the equipment connecting joint 1010 is connected to the gas insulated electric equipment in a sealing mode, the other end of the equipment connecting joint 1010 is communicated with the valve 4, and the equipment connecting joint 1010 is a self-sealing valve type joint or a self-sealing valve joint. And the other end of the valve 4 is connected to a multi-way connection 9. The gas density relay body 1, the pressure sensor 2, the pressure regulating mechanism 5, the micro-water sensor 13 and the decomposition product sensor 15 are arranged on the multi-way joint 9; the temperature sensor 3 is provided on the equipment connection fitting 1010 or the gas insulated electric equipment. The online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2, the temperature sensor 3, the micro-water sensor 13, the decomposition product sensor 15 and the intelligent control unit 7 are connected. The pressure sensor 2 and the pressure detector 103 of the gas density relay are communicated with the pressure adjusting mechanism 5 on a gas path; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
In contrast to the second exemplary embodiment, the temperature sensor 3 is arranged on the device connection 1010 or on the gas-insulated electrical device; and the gas insulated electric equipment also comprises a micro water sensor 13 and a decomposition product sensor 15, and can monitor the micro water content and the decomposition product content of the gas insulated electric equipment.
Example fifteen:
as shown in fig. 15, a multifunctional gas density relay includes: the gas density relay body 1 (mainly also includes casing 101, and locate base 102, pressure detector 103, temperature compensation element 104, core 105, pointer 106, calibrated scale 107, end seat 108, a plurality of signal generator 109 and equipment attach fitting 1010 in the casing), first pressure sensor 21, second pressure sensor 22, first temperature sensor 31, second temperature sensor 32, valve 4, pressure adjustment mechanism 5, online check joint signal sampling unit 6, intelligent control unit 7, multi-way joint 9, connector 16. One end of the connector 16 is connected to the device connector (self-sealing valve or self-sealing valve connector) 1010 in a sealing manner, the other end of the connector 16 is communicated with one end of the valve 4, and the other end of the valve 4 is connected with the multi-way connector 9. The valve 4 is sealed in the first shell 41, and the control cable of the valve 4 is led out through the first lead-out wire sealing member 42 sealed with the first shell 41, so that the valve 4 is ensured to be sealed, and the valve can reliably work for a long time. The gas density relay body 1, the first pressure sensor 21, the first temperature sensor 31, and the pressure adjusting mechanism 5 are provided on the multi-way joint 9. The pressure adjusting mechanism 5 is sealed in the second shell 55, and a control cable of the pressure adjusting mechanism 5 is led out through a second outgoing line sealing part 56 sealed with the second shell 55, so that the pressure adjusting mechanism 5 is sealed and can work reliably for a long time. The second pressure sensor 22 and the second temperature sensor 32 are disposed on the connection head 16. When the valve 4 is opened, the first pressure sensor 21, the second pressure sensor 22, and the pressure detector 103 of the gas density relay body 1 communicate with the pressure adjustment mechanism 5 on the gas path. When the valve 4 is closed, the first pressure sensor 21 and the pressure detector 103 of the gas density relay body 1 are communicated with the pressure adjusting mechanism 5 on the gas path, and the second pressure sensor 22 is not communicated with the pressure detector 103 and the pressure adjusting mechanism 5 of the gas density relay body 1 on the gas path. The first pressure sensor 21, the second pressure sensor 22, the first temperature sensor 31 and the second temperature sensor 32 are respectively connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with an intelligent control unit 7.
Different from the second embodiment, there are two pressure sensors, that is, a first pressure sensor 21 and a second pressure sensor 22; the number of the temperature sensors is two, namely a first temperature sensor 31 and a second temperature sensor 32. The multi-functional gas density relay that this embodiment provided has the safety protection function, specifically is exactly: 1) the gas density is continued when the gas density value monitored by the first pressure sensor 21 and the first temperature sensor 31 or the second pressure sensor 22 and the second temperature sensor 32 is lower than the set valueThe appliance automatically sends out the notification signal without checking the gas density relay itself. For example, when the gas density value of the plant is less than the set value, the verification is not performed, and only when the gas density value of the plant is ≧ (lock pressure +0.02MPa), the verification can be performed. The contact point alarms and has a status indication. 2) During the verification, the valve 4 is closed, and when the density value monitored by the second pressure sensor 22 and the second temperature sensor 32 is lower than the set value, the gas density relay automatically does not perform the verification any more, and simultaneously sends out a notification signal (gas leakage). For example, when the gas density value of the plant is less than the set value (lock pressure +0.02MPa), it is not verified. The set value can be set arbitrarily as required. Meanwhile, the gas density relay is also provided with a plurality of pressure sensors and a plurality of temperature sensors for mutual verification, and the sensors and the gas density relay body 1 for mutual verification, so that the gas density relay is ensured to normally work. Comparing the pressure values obtained by monitoring by the first pressure sensor 21 and the second pressure sensor 22, and checking each other; comparing the temperature values obtained by monitoring by the first temperature sensor 31 and the second temperature sensor 32, and checking each other; the density value P1 obtained by monitoring the first pressure sensor 21 and the first temperature sensor 3120A density value P2 monitored with the second pressure sensor 22 and the second temperature sensor 3220Comparing and checking each other; even the density value Pe of the rated pressure value of the gas density relay body 1 can be verified20And comparing and checking each other. As long as the data of the first pressure sensor 21, the second pressure sensor 22, the first temperature sensor 31, the second temperature sensor 32 and the gas density relay body 1 are consistent and normal, the gas density relay can be indicated to be normal, the gas density relay does not need to be checked manually on site, and the gas density relay can be free of manual checking throughout the life. Unless the data of a certain pressure sensor, a certain temperature sensor and the gas density relay body 1 of a certain electrical device in the transformer substation are inconsistent and abnormal, the maintenance personnel are arranged to process the data.
Example sixteen:
as shown in fig. 16, the intelligent control unit 7 mainly comprises a processor U1(71), a power supply U2(72), a communication module U3(73), an intelligent control unit protection circuit U4(74), a display, output and operation U5(75), a data storage U6(76), and the like. The processor U1(71) contains a crystal oscillator and a filter circuit. The intelligent control unit protection circuit U4(74) comprises a surge protection circuit, a filter circuit, a short circuit protection circuit, a polarity protection circuit, an overvoltage protection circuit and the like. The power supply has two stages and also comprises a voltage reduction module.
The communication mode of the communication module U3(73) may be wired: such as RS232, RS485, CAN-BUS and other industrial buses, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carrier and the like; or wireless: such as 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar and the like. The display and output U5(75) may be: nixie tubes, LEDs, LCDs, HMI, displays, matrix screens, printers, faxes, projectors, mobile phones and the like can be flexibly combined by one or a plurality of types. The data store U6(76) may be: FLASH memory cards such as FLASH, RAM, ROM, hard disk, SD, etc., magnetic tapes, punched paper tapes, optical disks, U disks, discs, films, etc., can be flexibly combined by one or more types.
Example seventeen:
as shown in fig. 17, the intelligent control unit 7 mainly includes a processor U1(71), a power supply U2(72), a communication module U3(73), an intelligent control unit protection circuit U4(74), and the like. The processor U1(71) contains a crystal oscillator and a filter circuit. The intelligent control unit protection circuit U4(74) comprises a surge protection circuit, a filter circuit, a short circuit protection circuit, a polarity protection circuit, an overvoltage protection circuit and the like. The power supply has two stages and also comprises a voltage reduction module. The pressure sensor 2 passes through the overvoltage protection circuit, the operational amplification circuit and the modulation circuit, and then passes through the filter circuit to the processor U1 (71). In the communication module U3(73), the communication chip is connected to the communication interface through the surge protection circuit.
Example eighteen:
FIG. 18 is a schematic diagram of a 4-20mA type density transmitter circuit for the gas density relay of the present application. As shown in fig. 18, the 4-20Ma type density transmitter is mainly composed of a microprocessor, a power supply, a modulation circuit, a current loop, a protection circuit, a pressure sensor, an operational amplifier, a temperature sensor, a proportional modulation module, a voltage reduction module, and the like. The microprocessor contains a crystal oscillator and a filter circuit. The protection circuit comprises a surge protection circuit, a filter circuit, a short-circuit protection circuit, a polarity protection circuit, an overvoltage protection circuit and the like. The analog pressure sensor passes through the overvoltage protection circuit and the operational amplification circuit, reaches the modulation circuit, and then passes through the filter circuit to reach the microprocessor, so that the microprocessor can acquire a pressure value and a temperature value, and a density value signal is obtained after calculation and conversion of the microprocessor. The density value signal passes through a proportion modulation module, a modulation circuit and a current loop to obtain the density value of 4-20 Ma.
In a word, after passing through an amplifying circuit, the simulated pressure sensor, the simulated temperature sensor and the simulated micro-water sensor are converted into A/D (analog to digital) and then are converted into MCU (microprogrammed control unit) to realize the collection of pressure, temperature and moisture. The intelligent control unit 7 can contain or be connected with a printer and a liquid crystal display, and can also realize USB storage and RS232 communication.
Example nineteenth:
as shown in fig. 19, a multifunctional gas density relay includes: the gas density relay comprises a gas density relay body 1 (mainly comprising a shell 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 107, an end seat 108, a plurality of signal generators 109 and an equipment connecting joint 1010 which are arranged in the shell), a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7. The intelligent control unit 7 comprises: the intelligent control system comprises a processor U1(71), a power supply U2(72), a communication module U3(73), an intelligent control unit protection circuit U4(74), a valve controller U7(77), an execution controller U8(78), a human-computer interface U9(79), a pressure adjusting mechanism position detector 511 and the like. The execution controller U8(78) may also be referred to as a control system, and may be provided on the intelligent control unit 7; or the control system part device is arranged on the pressure regulating mechanism 5, and the two are closely matched and fused together.
To sum up, the application discloses multi-functional gas density relay includes: the casing, and locate base, pressure detector, temperature compensation component, core, pointer, calibrated scale, a plurality of signal generator and equipment attach fitting in the casing, gas density relay still includes: a pressure sensor. The pressure is adjusted by the pressure adjusting mechanism to lift, so that the density relay generates contact action, the alarm and/or locking contact action value and/or return value of the gas density relay are detected according to the density value when the contact acts, the self-checking work of the gas density relay is completed, no maintainer is required to arrive at the site, the reliability of a power grid is greatly improved, the efficiency is improved, and the cost is reduced. Meanwhile, the gas density and/or gas micro-water of the gas insulated electrical equipment can be monitored on line, on-line monitoring and fault diagnosis can be carried out on the gas insulated electrical equipment, and gas leakage of the gas insulated electrical equipment can be found in time.
The present invention has been described in detail with reference to the specific embodiments, but the present invention is only by way of example and is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are intended to be within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.

Claims (29)

1. A multi-functional gas density relay which characterized in that: the temperature compensation device comprises a shell, a base, a pressure detector, a temperature compensation element, at least one signal generator, an equipment connecting joint and a pressure adjusting mechanism, wherein the base, the pressure detector, the temperature compensation element, the at least one signal generator and the equipment connecting joint are arranged in the shell;
and the gas circuit of the pressure regulating mechanism is communicated with the pressure detector, and the pressure regulating mechanism is configured to regulate the pressure rise and fall of the gas circuit of the gas density relay so as to enable the gas density relay to generate contact signal action, wherein the contact signal comprises alarm and/or locking.
2. A multi-functional gas density relay according to claim 1, wherein: the base and the equipment connecting joint are of an integral structure.
3. A multi-functional gas density relay according to claim 1, wherein: the pressure adjusting mechanism is arranged on the equipment connecting joint, or arranged in the shell, or arranged on the shell.
4. A multi-functional gas density relay according to claim 1, wherein: the signal generator comprises a microswitch or a magnetic auxiliary electric contact; the pressure detector comprises a bourdon tube or a bellows; the temperature compensation element adopts a temperature compensation sheet or gas sealed in the shell.
5. A multi-functional gas density relay according to claim 1, wherein: the pressure adjusting mechanism is manually adjusted or automatically adjusted.
6. A multi-functional gas density relay according to claim 1, wherein: the gas density relay outputs a contact signal through the signal generator.
7. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises a pressure sensor, and a probe of the pressure sensor is mounted on a gas path of the gas density relay.
8. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises an intelligent control unit, wherein the intelligent control unit is connected with the pressure adjusting mechanism and is configured to complete control of the pressure adjusting mechanism.
9. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises a pressure sensor and an intelligent control unit, wherein a probe of the pressure sensor is installed on a gas path of the gas density relay, the intelligent control unit is respectively connected with the pressure adjusting mechanism and the pressure sensor, and is configured to complete the control of the pressure adjusting mechanism and the collection of pressure values.
10. A multi-functional gas density relay according to claim 1, wherein: the gas density relay also comprises a temperature sensor, and a probe of the temperature sensor is arranged on or outside the gas path of the gas density relay, or in the shell of the gas density relay, or outside the shell of the gas density relay.
11. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises a pressure sensor and a temperature sensor; or, also include the gas density transmitter composed of pressure sensor and temperature pick-up; alternatively, a density measuring sensor of quartz tuning fork technology is also included.
12. A multi-functional gas density relay according to claim 11, wherein: the gas density relay, the pressure sensor and the temperature sensor are of an integrated structure; or the gas density relay, the pressure sensor and the temperature sensor are integrated to form a remote transmission type gas density relay.
13. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises a valve, one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the base of the gas density relay.
14. A multi-functional gas density relay according to claim 13, wherein: the valve is sealed within a chamber or housing.
15. A multi-functional gas density relay according to claim 13, wherein: the valve and the pressure regulating mechanism are sealed within a chamber or housing.
16. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises an online check contact signal sampling unit, wherein the online check contact signal sampling unit is directly or indirectly connected with the gas density relay and is configured to sample contact signals of the gas density relay at the ambient temperature.
17. A multi-functional gas density relay according to claim 1, wherein: the gas density relay also comprises a display mechanism, the display mechanism comprises a movement, a pointer and a dial, the movement is fixed on the base, the pointer is arranged on the movement and is arranged in front of the dial, and the pointer is combined with the dial to display the gas density value; and/or the display mechanism comprises a digital device or a liquid crystal device with a display of the value.
18. A multi-functional gas density relay according to claim 1, wherein: the gas density relay also comprises a pressure sensor, a temperature sensor, a valve, an online check contact signal sampling unit and an intelligent control unit; wherein,
one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the base; the pressure sensor is communicated with the pressure detector on a gas path; the gas path of the pressure regulating mechanism is communicated with the pressure detector; the online check contact signal sampling unit is respectively connected with the signal generator and the intelligent control unit and is configured to sample contact signals of the gas density relay; the intelligence accuse unit, respectively with pressure sensor temperature sensor pressure adjustment mechanism the valve with online check-up contact signal sampling unit is connected, is configured to control closing or opening of valve, accomplishes pressure adjustment mechanism's control, pressure value collection and temperature value collection and/or gas density value collection, and detect gas density relay's contact signal action value and/or contact signal return value accomplish gas density relay's check-up work on line.
19. A multi-functional gas density relay according to claim 18, wherein: the gas density relay is provided with a rated pressure value output signal which is connected with the intelligent control unit.
20. A multi-functional gas density relay according to claim 18, wherein: be equipped with valve control delivery outlet, pressure adjustment mechanism control delivery outlet on the intelligence accuse unit, the intelligence accuse unit passes through valve control delivery outlet with the valve is linked together, the intelligence accuse unit passes through pressure adjustment mechanism control delivery outlet with pressure adjustment mechanism is linked together.
21. A multi-functional gas density relay according to claim 1, wherein: the gas density relay also comprises at least one sensor connector, and the gas density relay is connected with a micro-water sensor for monitoring the micro-water value of gas on line through the sensor connector, and/or is connected with a decomposition product sensor for monitoring the decomposition product of gas on line through the sensor connector.
22. A multi-functional gas density relay according to claim 1, wherein: the gas density relay also comprises a multi-way joint, and a base, a pressure detector and a pressure adjusting mechanism of the gas density relay are arranged on the multi-way joint; or the equipment connecting joint and the pressure regulating mechanism of the gas density relay are arranged on the multi-way joint; or the equipment connecting joint, the base and the pressure adjusting mechanism of the gas density relay are arranged on the multi-way joint.
23. A multi-functional gas density relay according to claim 22, wherein: the gas density relay further comprises a self-sealing valve, and the base of the gas density relay, the pressure detector and the self-sealing valve are installed on the multi-way connector.
24. A multi-functional gas density relay according to claim 1, wherein: the gas density relay further comprises at least one connecting pipe, and the base, the pressure detector and the pressure adjusting mechanism of the gas density relay are connected together through the connecting pipe.
25. A multi-functional gas density relay according to claim 1, wherein: during verification, the pressure adjusting mechanism is a closed air chamber, a heating element and/or a refrigerating element are arranged outside or inside the closed air chamber, and the temperature of the gas in the closed air chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the pressure of the gas density relay is increased or decreased; or,
the pressure adjusting mechanism is a cavity with an opening at one end, and the other end of the cavity is communicated with the gas circuit of the gas density relay; a piston is arranged in the cavity, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod to further drive the piston to move in the cavity; or,
the pressure adjusting mechanism is a closed air chamber, a piston is arranged in the closed air chamber and is in sealed contact with the inner wall of the closed air chamber, a driving part is arranged outside the closed air chamber, and the driving part pushes the piston to move in the cavity through electromagnetic force; or,
the pressure adjusting mechanism is an air bag with one end connected with a driving part, the air bag generates volume change under the driving of the driving part, and the air bag is communicated with the gas density relay; or,
the pressure adjusting mechanism is a corrugated pipe, one end of the corrugated pipe is communicated with the gas density relay, and the other end of the corrugated pipe stretches under the driving of the driving part; or,
the pressure adjusting mechanism is a deflation valve which is arranged in a closed air chamber or is connected with the closed air chamber; or,
the pressure regulating mechanism is a compressor; or,
the pressure regulating mechanism is a pump;
wherein, the driving part comprises one of a magnetic force, a motor, a reciprocating mechanism, a Carnot cycle mechanism and a pneumatic element.
26. A multi-functional gas density relay according to claim 1, wherein: the pressure regulating mechanism is sealed in a cavity or housing.
27. A multi-functional gas density relay according to claim 1, wherein: the gas density relay also comprises a display interface for man-machine interaction, displays the current verification data in real time and/or supports data input.
28. A multi-functional gas density relay according to claim 1, wherein: the gas density relay realizes remote communication with the background monitoring terminal through the communication equipment.
29. A multi-functional gas density relay according to claim 28, wherein: the communication mode of the communication equipment is a wired communication mode or a wireless communication mode; wherein,
the wired communication mode comprises an RS232 BUS, an RS485 BUS, a CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, a coaxial cable, a PLC power carrier or a cable Wire;
the wireless communication mode comprises a sensor built-in 5G/NB-IOT communication module, 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic waves, sound waves, satellites, light waves, quantum communication or sonar.
CN201921464648.9U 2019-09-04 2019-09-04 Multifunctional gas density relay Active CN210489519U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115436221A (en) * 2022-07-29 2022-12-06 上海思源高压开关有限公司 A GIS cylinder gas density detection method and detection mechanism under low temperature conditions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115436221A (en) * 2022-07-29 2022-12-06 上海思源高压开关有限公司 A GIS cylinder gas density detection method and detection mechanism under low temperature conditions

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