CN212513375U - Switchgear contact temperature sensor detection platform based on controllable constant temperature platform - Google Patents
Switchgear contact temperature sensor detection platform based on controllable constant temperature platform Download PDFInfo
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- CN212513375U CN212513375U CN202021631280.3U CN202021631280U CN212513375U CN 212513375 U CN212513375 U CN 212513375U CN 202021631280 U CN202021631280 U CN 202021631280U CN 212513375 U CN212513375 U CN 212513375U
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Abstract
The utility model provides a switch cabinet contact temperature measuring sensor detection platform based on a controllable constant temperature platform, which comprises a constant humidity and constant temperature box, a controllable constant temperature platform and a current generator; the controllable constant temperature platform is positioned in the cavity of the constant humidity and constant temperature box, and the current generator is arranged in the equipment area of the constant humidity and constant temperature box; the constant-humidity incubator is used for simulating the operating environment of the switch cabinet contact temperature measuring sensor and providing high-low temperature tolerance test; the controllable constant-temperature platform is used for simulating the parts, which are easy to heat, of the trolley contact and the cable joint of the switch cabinet, can provide constant heating conditions, and is suitable for carrying out accuracy tests on temperature measurement sensors in various installation modes; the current generator is used for providing output current for the current power-taking type sensor to work and take power. Compare in the tradition and only to the detection of sensor body temperature measurement performance, the utility model discloses the performance detection to cubical switchboard contact temperature measurement sensor has more pertinence and validity.
Description
Technical Field
The utility model relates to an electrical equipment on-line monitoring sensor's detection area specifically is a cubical switchboard contact temperature measurement sensor testing platform based on controllable constant temperature platform.
Background
Traditional cubical switchboard temperature detection mainly is that the naked eye patrols and examines and infrared detection, and inside the cubical switchboard, especially easy heating parts such as dolly contact all were difficult to detect to two kinds of modes. Meanwhile, the inspection cycle of the unattended transformer substation is long, and the heating defect is difficult to find in time. Therefore, the contact temperature on-line monitoring system of the high-voltage switch cabinet is rapidly developed and widely applied to various switch cabinet type equipment. The temperature measurement technology is the core of this kind of monitoring system, uses comparatively extensive temperature measurement sensor at present to include: thermocouple type, infrared radiation type, fiber grating type, acoustic surface wave type. Due to the technical capability and the process quality difference of sensor manufacturers, the performance difference is obvious. The traditional temperature sensor can only detect the detection precision of the sensor body. And the cubical switchboard contact temperature measurement sensor is because of mounting means and mounted position difference, and the actual measuring accuracy degree is far less than the measuring accuracy degree that the sensor marked, can't realize the detection to sensor authenticity ability.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art exists, the utility model provides a cubical switchboard contact temperature measurement sensor testing platform based on controllable constant temperature platform, the measuring accuracy degree is more close actual mounting condition, can compatible multiple sensor mounting means and get the electric mode to integrated the degree of accuracy test, got electric capability test and high low temperature resistant functions such as receiving the survey.
A switch cabinet contact temperature measurement sensor detection platform based on a controllable constant temperature platform comprises a constant humidity and constant temperature box, the controllable constant temperature platform and a current generator; the controllable constant temperature platform is positioned in the cavity of the constant humidity and constant temperature box, and the current generator is arranged in the equipment area of the constant humidity and constant temperature box; the constant-humidity incubator is used for simulating the operating environment of the switch cabinet contact temperature measuring sensor and providing high-low temperature tolerance test; the controllable constant-temperature platform is used for simulating the parts, which are easy to heat, of the trolley contact and the cable joint of the switch cabinet, can provide constant heating conditions, and is suitable for carrying out accuracy tests on temperature measurement sensors in various installation modes; the current generator is used for providing output current for the current power-taking type sensor to work and take power.
Furthermore, various thermocouples and heating resistors are embedded in different positions inside the controllable constant temperature platform, so that the surface temperature of the controllable constant temperature platform is uniform and controllable, and various shapes and screw holes are formed in the surface of the controllable constant temperature platform, so that installation conditions are provided for the binding belt type sensor and the bolt type sensor.
Furthermore, controllable constant temperature platform is equipped with three platform from top to bottom in proper order, is upper mounting plate, well platform and lower platform respectively, is equipped with upper mounting plate thermocouple and upper mounting plate resistance that generates heat at the upper mounting plate of controllable constant temperature platform, is equipped with well platform thermocouple at well platform.
Furthermore, the outer wall of the constant humidity and constant temperature box is provided with an auxiliary control panel, and all the heating resistors and all the thermocouple measuring and controlling wires are led out of the body to the auxiliary control panel of the constant humidity and constant temperature box.
Further, controllable constant temperature platform is still including bandage and the fixed subassembly of snap ring of locating the upper mounting plate, locating down the fixing bolt of platform, bonding subassembly and locating the fixed bolster of well platform, and the bandage and the fixed subassembly of snap ring of upper mounting plate include snap ring and bandage for fixed bandage formula temperature sensor, fixing bolt is used for adapting to the installation of the fixed temperature sensor of bolt.
The utility model discloses a setting is with the effective integration of constant humidity thermostated container and controllable constant temperature platform, makes the platform can satisfy the difference in temperature electricity taking and electric current and gets two kinds of electricity modes of getting simultaneously to and the temperature sensor of two kinds of mounting means of bandage formula and bolt formula, under considering the actual mounting means of sensor, to the temperature measurement performance of sensor, get electric performance and high low temperature tolerance performance and detect, compare in the tradition detection more accord with the detection demand of this type of sensor.
Drawings
FIG. 1 is a schematic structural diagram of a detection platform of a switch cabinet contact temperature measurement sensor based on a controllable constant temperature platform;
FIG. 2 is a schematic view of the installation of the temperature measuring sensor of the controllable constant temperature platform of the present invention;
FIG. 3 is a method for controlling the temperature of the controllable constant temperature platform according to the present invention;
FIG. 4 is a schematic diagram of the arrangement of the heating resistor and the thermocouple in the controllable constant temperature platform of the present invention;
FIG. 5 is a statistical chart of actual mounting sensor accuracy measurements;
FIG. 6 is a statistical graph of the average accuracy results of different types of sensors;
in the figure: the device comprises a constant-humidity incubator, a controllable constant-temperature platform, a current generator, a current acquisition sensor, a support rack, a binding band and clamping ring fixing component, a fixing bolt, a binding component, a fixing support, an upper platform thermocouple, a middle platform thermocouple, a lower platform thermocouple, an upper platform heating resistor and a lower platform heating resistor, wherein the constant-humidity incubator comprises 1 part, 2 parts, the controllable constant-temperature platform, 3 parts, the current generator, 4 parts, the current acquisition sensor, 5 parts, the support rack, 6 parts, the binding band and the clamping ring fixing component, 7 parts, the fixing.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, one embodiment of the platform for detecting a temperature sensor of a switch cabinet contact based on a controllable constant temperature platform of the present invention includes a constant humidity incubator 1, and a controllable constant temperature platform 2 and a current generator 3 disposed in the constant humidity incubator 1. The controllable constant temperature platform 2 can be fixed in the central area of the cavity of the constant humidity and constant temperature box 1 through the supporting rack 5.
Controllable constant temperature platform 2 is equipped with three platform from top to bottom in proper order, and the platform is upper mounting plate, well platform and lower platform respectively, and each platform can be laid for the echelonment, as shown in fig. 4, controllable constant temperature platform 2 is three cylinder structure from top to bottom in proper order, and the radius of cylinder from top to bottom crescent. Each platform of the controllable constant temperature platform 2 is provided with a heating resistor and a thermocouple as required, in this embodiment, an upper platform thermocouple 10 and an upper platform heating resistor 13 are arranged on an upper platform of the controllable constant temperature platform 2, a middle platform thermocouple 11 is arranged on a middle platform, and a lower platform thermocouple 12 and a lower platform heating resistor 14 are arranged on a lower platform. The outer wall of the constant-humidity incubator 1 is provided with an auxiliary control panel, and the measuring and controlling lines of all heating resistors (13, 14) and all thermocouples (10, 11, 12) are led out of the body to the auxiliary control panel of the constant-humidity incubator 1, so that a tester can conveniently control the controllable constant-temperature platform 2 in real time.
For the temperature measurement sensor adopting temperature difference electricity taking, the controllable constant temperature platform 2 and the constant humidity and constant temperature box 1 can be set at different temperatures, so that a certain temperature difference is formed between a measuring point of the sensor and the environment, and the sensor is started to work. When the temperature difference electricity taking performance test is carried out on the sensor, the constant-humidity constant-temperature box 1 can be adjusted to the room temperature, after 10 minutes, the controllable constant-temperature platform 2 is gradually added by taking 1 ℃ as an interval, and after each temperature adjustment, whether the sensor is started or not is detected after the controllable constant-temperature platform 2 is stable. And repeating the above process until the sensor starts to work, namely realizing the detection of the temperature difference electricity-taking performance of the sensor.
For the current power-taking sensor 4, as shown in fig. 1, an output wire of the current generator 3 can pass through a magnetic ring of the current power-taking sensor 4, the current power-taking sensor 4 can work normally through the output current of the current generator 3, the current generator 3 is installed in an equipment area at the lower part of the constant humidity incubator 1, and a measurement and control wire of the current generator 3 is led out to an auxiliary control panel of the constant humidity incubator 1, so that a tester can control the output current in real time. When the current electricity taking performance of the sensor is tested, the current generator 3 is started from 1A, the current output value is gradually increased by taking 1A as an interval, and whether the sensor is started or not is immediately detected after each adjustment. And repeating the above process until the sensor starts to work, namely realizing the detection of the current power taking performance of the sensor.
The contact temperature measuring sensor in the switch cabinet has various installation modes according to different installation positions and sensor measurement principles. For adapting to different sensor installation modes, the utility model discloses different shapes and screw have been designed on controllable constant temperature platform 2, as shown in fig. 2. The controllable constant temperature platform 2 is provided with four types of sensor mounting modes, namely a binding belt and clamping ring fixing component 6 arranged on the upper platform, a fixing bolt 7 arranged on the lower platform, an adhesive component 8 and a fixing bracket 9 arranged on the middle platform, wherein the binding band and clamping ring fixing component 6 of the upper platform comprises a clamping ring 6-1 and a binding band 6-2, used for fixing the bandage type temperature measuring sensor, the fixing bolt 7 can replace M8, M10, M12 and other different forms, so as to adapt to the installation of the temperature sensor fixed by the bolt, the bonding component 8 can be realized by double faced adhesive tape and the like and is suitable for the installation of the contact sensor, the fixed bracket 9 is used for fixing bracket products, the sensor arranged at the binding band and snap ring fixing component 6 mainly simulates a trolley contact, the position is a cylindrical structure, and the other positions simulate a plane heating position.
In order to guarantee that the whole surface temperature of constant temperature platform that generates heat is balanced, the utility model discloses at the inside evenly distributed of platform a plurality of heating resistors, arranged the thermocouple in upper, middle and lower three position simultaneously, through the resistance wire heating power who adjusts different positions, reach surface temperature's unanimity.
The thermostatable platform 2 has two main functions, including simulating the heating of the contacts and maintaining a constant temperature to detect the measurement accuracy of the sensor, the temperature control method is shown in fig. 3, and the arrangement positions of the heating resistors and thermocouples are shown in fig. 4. Two heating resistors 13 and 14 are respectively arranged at the central positions in the upper copper block and the lower copper block of the controllable constant temperature platform 2, thermocouple sensors 10, 11 and 12 are pre-embedded at the adjacent surfaces of the upper platform, the middle platform and the lower platform, and when the heating temperature T is set0Thereafter, the average temperature T detected by comparing the three thermocouples is measured1And T0Controlling whether the heating resistor heats or not; when T is1Is equal to T0The heating power of the heating resistor is reduced to ensure that the heating platform can keep constant temperature; when T is1Greater than T0When the heating resistor stops working, the platform needs to be cooled naturally.
The calibration measurement accuracy of the current temperature measurement sensor is usually less than +/-2 ℃. Because the sensor is the ligature area installation usually, this mounting means can influence contact temperature sensor's detection reliability, through the utility model discloses above-mentioned after improving, according to the relevant standard that the cubical switchboard defect of generating heat was definited, tested 30 ℃, 50 ℃, 80 ℃, 100 ℃ and 125 ℃ 5 degree of accuracy altogether to each sensor respectively. Adopt the utility model relates to a platform's testing result is shown in figure 5. Wherein, the thermocouple type sensor is more in quantity, and the difference between the products is great, and some sensors can guarantee the measurement accuracy of 2 ℃. In the test, the touch sensor with the multi-contact-point arrangement is adopted, and the measurement reliability of the touch sensor is obviously superior to that of a traditional single-point contact sensor. All the tests are sensors newly installed in a laboratory, part of the measurement errors are obviously larger, the maximum measurement error exceeds +/-8 ℃, and for the sensors needing long-time live operation, the measurement errors are more obvious after the installation time of the binding belt reaches several years. Therefore, the utility model discloses the measuring accuracy under the actual installation condition should be less than 2 ℃ with the unanimous satisfaction of the sensor calibration accuracy in the experiment.
Meanwhile, the average accuracy of the different types of sensors was counted, and the result is shown in fig. 6. The infrared radiation type temperature measurement sensor is obviously superior to other types of sensors, the accuracy of infrared sensors of 5 different manufacturers is less than +/-2 ℃, and the consistency is good. The infrared radiation type sensor is a non-contact sensor and is less affected by the installation mode. Other types of sensors have a large increase in measurement error beyond 100 ℃. The binding band used for installing the contact sensor can deform under the heated condition, so that the contact area and the contact force of a contact point are reduced, and the difference between the measured temperature of the sensor and the actual heating temperature is increased. It is proposed that the touch sensor has increased contact points and improved mounting. Meanwhile, the communication distance of the surface acoustic wave sensor is short, and the signal is weak; the optical fiber grating type sensor has a zero drift phenomenon, and the insulation performance of the optical fiber can increase the hidden danger of external insulation flashover of the air insulation switch cabinet.
In order to detect whether the sensor can normally work after being subjected to high and low temperature environments, the utility model discloses still developed high and low temperature tolerance test, endure 1 hour respectively under two kinds of extreme ambient temperature of-20 ℃ and 160 ℃. -20 ℃ is the extreme ambient temperature that may be encountered and 160 ℃ is the extreme heat generation temperature that may be encountered inside the switchgear. The test results showed that 2 of the 24 sensors were damaged to different extents. All sensors can work normally. The number of flying wires in the thermocouple sensor No. 4 is more, and the insulating sheath of the lead is cracked, so that the risk of short circuit is caused; the shell of the thermocouple No. 9 sensor is cracked, and the packaging quality of the sensor is poor.
Compared with the traditional detection method that the switch cabinet contact temperature measurement sensor only aims at the sensor body, the utility model can provide controllable environmental temperature and heating temperature through the constant humidity thermostat and the controllable constant temperature platform, and is suitable for the temperature difference power taking type temperature measurement sensor to carry out power taking performance test and accuracy test; through different mounted positions of simulation cubical switchboard contact temperature sensor, designed and had the controllable constant temperature platform that generates heat of multiple mounting means to fuse its with the design of constant humidity thermostated container, thereby realize getting the accuracy of electricity type temperature sensor, getting electric performance and high low temperature tolerance test three tests to the difference in temperature electricity and electric current, the result of its detection more accords with on-the-spot actual conditions than former testing, more can the measuring performance of true reflection sensor.
The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a cubical switchboard contact temperature measurement sensor testing platform based on controllable constant temperature platform which characterized in that: comprises a constant humidity and constant temperature box (1), a controllable constant temperature platform (2) and a current generator (3); the controllable constant temperature platform (2) is positioned in the cavity of the constant humidity and constant temperature box (1), and the current generator (3) is arranged in the equipment area of the constant humidity and constant temperature box (1); the constant-humidity incubator (1) is used for simulating the operating environment of a switch cabinet contact temperature measuring sensor and providing a high-low temperature tolerance test; the controllable constant temperature platform (2) is used for simulating the parts of the switch cabinet trolley contact and the cable joint which are easy to heat, can provide constant heating conditions, and is suitable for carrying out accuracy tests on temperature measuring sensors in various mounting modes; the current generator (3) is used for providing output current and supplying power for the current electricity taking type sensor (4) to work and take electricity.
2. The switch cabinet contact temperature sensor detection platform based on the controllable constant temperature platform as claimed in claim 1, wherein: the controllable constant temperature platform (2) is internally embedded with various thermocouples and heating resistors at different positions, so that the surface temperature of the platform is uniform and controllable, and the surface of the controllable constant temperature platform (2) is provided with various shapes and screw holes to provide mounting conditions for binding-belt type and bolt type sensors.
3. The switch cabinet contact temperature sensor detection platform based on the controllable constant temperature platform as claimed in claim 2, wherein: controllable constant temperature platform (2) are equipped with three platform from top to bottom in proper order, are upper mounting plate, well platform and lower platform respectively, are equipped with upper mounting plate thermocouple (10) and upper mounting plate resistance (13) that generates heat at the upper mounting plate of controllable constant temperature platform (2), are equipped with well platform thermocouple (11) in well platform, and platform thermocouple (12) and lower platform resistance (14) that generates heat are equipped with down to the platform down.
4. The switch cabinet contact temperature sensor detection platform based on the controllable constant temperature platform as claimed in claim 3, wherein: the outer wall of constant humidity thermostated container (1) is equipped with auxiliary control panel, goes up by this internal auxiliary control panel who draws forth to constant humidity thermostated container (1), platform heating resistor (13), lower platform heating resistor (14) and upper platform thermocouple (10), well platform thermocouple (11), the observing and controlling line of platform thermocouple (12) down.
5. The switch cabinet contact temperature sensor detection platform based on the controllable constant temperature platform as claimed in claim 3, wherein: the controllable constant temperature platform (2) further comprises a binding band and clamping ring fixing component (6) arranged on the upper platform, a fixing bolt (7) arranged on the lower platform, a bonding component (8) and a fixing support (9) arranged on the middle platform, the binding band and clamping ring fixing component (6) of the upper platform comprises a clamping ring (6-1) and a binding band (6-2) and is used for fixing the binding band type temperature measuring sensor, and the fixing bolt (7) is used for being adapted to the installation of the temperature measuring sensor fixed by the bolt.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879431A (en) * | 2020-08-07 | 2020-11-03 | 国网湖北省电力有限公司电力科学研究院 | Switch cabinet contact temperature measuring sensor detection platform and method based on controllable constant temperature platform |
| CN114136376A (en) * | 2021-11-30 | 2022-03-04 | 国网宁夏电力有限公司电力科学研究院 | Switchgear monitoring system based on temperature sensor fusion application |
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2020
- 2020-08-07 CN CN202021631280.3U patent/CN212513375U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879431A (en) * | 2020-08-07 | 2020-11-03 | 国网湖北省电力有限公司电力科学研究院 | Switch cabinet contact temperature measuring sensor detection platform and method based on controllable constant temperature platform |
| CN114136376A (en) * | 2021-11-30 | 2022-03-04 | 国网宁夏电力有限公司电力科学研究院 | Switchgear monitoring system based on temperature sensor fusion application |
| CN114136376B (en) * | 2021-11-30 | 2024-06-04 | 国网宁夏电力有限公司电力科学研究院 | Switching equipment monitoring system based on temperature sensor fusion application |
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