CN216144514U - Gas proportional valve endurance test device - Google Patents
Gas proportional valve endurance test device Download PDFInfo
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- CN216144514U CN216144514U CN202121917114.4U CN202121917114U CN216144514U CN 216144514 U CN216144514 U CN 216144514U CN 202121917114 U CN202121917114 U CN 202121917114U CN 216144514 U CN216144514 U CN 216144514U
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Abstract
The utility model discloses a durability testing device for a gas proportional valve, which comprises an air compressor, a pressure reducing valve, a first ball valve, an electric control pressure regulating valve and a pneumatic switch valve, wherein an air outlet of the air compressor is sequentially connected with the pressure reducing valve, the first ball valve, the electric control pressure regulating valve and the pneumatic switch valve through a gas transmission pipeline, an air outlet of the pneumatic switch valve is connected with at least one testing branch through the gas transmission pipeline, the testing branch comprises a second ball valve, a gas proportional valve to be tested and an electromagnetic flowmeter, gas flowing out of the pneumatic switch valve enters an air inlet end of the gas proportional valve to be tested through the second ball valve, the electromagnetic flowmeter is connected to an air outlet end of the gas proportional valve to be tested, and a secondary pressure air outlet of the gas proportional valve to be tested is connected with a pressure switch.
Description
Technical Field
The utility model relates to the technical field of testing of gas proportional valves, in particular to a durability testing device for a gas proportional valve.
Background
With the large-area promotion of the coal-to-gas engineering in the whole country, the gas heating stove/water heater enters every family, and the combustion performance and safety of the gas heating stove/water heater are closely related to the quality of a gas proportional valve used by the gas heating stove/water heater. The gas proportional valve is used as a core component of the gas heating water heater, and has the functions of realizing the turn-off and proportional adjustment of gas so as to obtain a reasonable gas and air proportion, maintain the safe and stable combustion working condition of the gas, improve the combustion heat efficiency and reduce the pollutant discharge. In the use process of the gas proportional valve, frequent opening and closing actions and proportional adjustment exist, so that the durability test of the gas proportional valve of the gas heating stove is necessary.
The gas proportional valve is used as an important part of a gas heating furnace, and structurally comprises a valve body, 2 switch electromagnetic coils and 1 proportional gas outlet pressure regulator, wherein the valve body is provided with a gas inlet, a gas outlet, an inlet pressure test port, a secondary outlet pressure test port and the like. The industry adopts pressure sensor test gas proportional valve's secondary pressure of extruding the atmospheric pressure test mouth, compares with the standard value according to the pressure value that measures, is unqualified when being less than the standard value, equals or is qualified when being higher than the standard value. However, according to the requirements and methods of GB 25034-. In addition, the testing device in the industry can only test the durability of one gas proportional valve, and cannot test the gas proportional valve in batches, so that the automation degree is low, and the testing efficiency is low.
SUMMERY OF THE UTILITY MODEL
Based on the problems, the utility model provides a gas proportional valve endurance test device and a test method thereof, which have the advantages that comprehensive endurance test can be performed on the gas proportional valve, outlet pressure and outlet flow data of the gas proportional valve can be obtained, multiple tests can be performed later, and more comprehensive information of the gas proportional valve can be obtained.
The utility model provides a durability testing device for a gas proportional valve, which comprises an air compressor, a pressure reducing valve, a first ball valve, an electronic control pressure regulating valve and a pneumatic switch valve, wherein an air outlet of the air compressor is sequentially connected with the pressure reducing valve, the first ball valve, the electronic control pressure regulating valve and the pneumatic switch valve through a gas transmission pipeline, an air outlet of the pneumatic switch valve is connected with at least one testing branch through the gas transmission pipeline, the testing branch comprises a second ball valve, a gas proportional valve to be tested and an electromagnetic flowmeter, gas flowing out of the pneumatic switch valve enters an air inlet end of the gas proportional valve to be tested through the second ball valve, the electromagnetic flowmeter is connected to an air outlet end of the gas proportional valve to be tested, and a secondary pressure air outlet of the gas proportional valve to be tested is connected with a pressure switch.
The utility model is further arranged such that a pressure gauge is provided between the pressure reducing valve and the first ball valve.
The utility model is further provided that two ends of the electric control pressure regulating valve are respectively provided with a first pressure transmitter and a second pressure transmitter.
The utility model is further configured that the driving end of the pneumatic switch valve is connected to the rear side intake air of the first ball valve through an electromagnetic valve, and the electromagnetic valve is used for controlling ventilation of the pneumatic switch valve.
The utility model is further provided with a control panel, a microcontroller, a switching value output module, a switching value input module, an analog quantity acquisition module, a first communication module and a second communication module are arranged in the control panel, and the switching value output module, the switching value input module, the analog quantity acquisition module, the first communication module and the second communication module are all connected with the microcontroller;
the first pressure transmitter and the second pressure transmitter are connected with the analog quantity acquisition module through analog signal wires;
the switching value output module is connected with a servo motor driver, and the servo motor driver is connected with the electric control pressure regulating valve and used for controlling the action of the electric control pressure regulating valve; the switching value output module is also connected with the electromagnetic valve and used for controlling the action of the electromagnetic valve; the switching value output module is also connected with a solid relay, and the solid relay is connected with the to-be-tested gas proportional valve and is used for controlling the opening or closing of a stop valve in the to-be-tested gas proportional valve; the switching value output module is also connected with a three-color alarm lamp and a buzzer, and the three-color alarm lamp comprises flashing lamps with three colors of red, yellow and green;
the switching value input module is connected with an alarm signal line of the pressure switch;
the first communication module is connected with a signal output end of the electromagnetic flowmeter, the first communication module is also connected with a constant current source, and an output end of the constant current source is connected to a proportional current control end of the gas proportional valve to be tested;
the second communication module is connected with the touch display screen for information interaction.
In conclusion, the beneficial effects of the utility model are as follows:
1. according to the gas proportional valve endurance testing device, air generated by the air compressor is adjusted to the specified pressure used for testing through the electric control pressure regulating valve, the first pressure transmitter and the second pressure transmitter, so that the pressure of air flow entering the gas proportional valve to be tested tends to be constant, and the testing reliability is indirectly improved; the electromagnetic flowmeter and the pressure switch are respectively connected to the main output port and the secondary pressure outlet of the gas proportional valve, so that the outlet pressure and the outlet flow of the gas proportional valve to be tested are detected, flow and pressure data are obtained, and comprehensive evaluation on the performance of the gas proportional valve to be tested is facilitated; the utility model allows more than one test branch to be arranged to test a plurality of gas proportional valves at the same time, thereby improving the test efficiency of the gas proportional valves; in addition, through the control board and the associated characteristics thereof arranged in the utility model, the automatic test of the gas proportional valve can be realized, the test parameters such as the test period, the test times and the like can be flexibly set, and more test flexibility is provided.
2. According to the utility model, a control curve of a testing device is designed according to a proportional current-output pressure relation curve of the gas proportional valve, an automatic flow is realized by adopting a microcontroller, the flow and pressure switch data acquisition of the gas proportional valve is realized by adopting an electromagnetic flowmeter and a pressure switch in an electrical part, and finally the durability of the gas proportional valve is completely represented; the utility model solves the problems of inaccurate endurance test of the gas proportional valve and low endurance test efficiency. The unattended automatic test system can be used for the factory test of a fuel gas proportional valve manufacturer and the incoming material detection of a fuel gas heating furnace complete machine manufacturer, so that the labor cost is saved for users.
Drawings
FIG. 1 is a graph of proportional current versus output pressure for a gas proportional valve of the type mentioned in the background of the utility model;
FIG. 2 is a schematic diagram of an air path structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control structure of an embodiment of the present invention;
FIG. 4 is a schematic view of the overall configuration of an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating the selection of the minimum proportional current setting and the maximum proportional current setting according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a test principle of an embodiment of the present invention;
FIG. 7 is a flowchart of a test procedure in an embodiment of the present invention;
FIG. 8 is a flowchart of a pause procedure in an embodiment of the present invention;
fig. 9 is a flowchart of a stop procedure in the embodiment of the present invention.
In the figure, 1, an air compressor; 2. a pressure reducing valve; 3. a pressure gauge; 4. a first ball valve; 5. a first pressure transmitter; 6. an electrically controlled pressure regulating valve; 7. a second pressure transmitter; 8. an electromagnetic valve; 9. a pneumatic valve; 10. a second ball valve; 13. a gas proportional valve to be tested; 16. a pressure switch; 19. an electromagnetic flow meter; 20. a three-color alarm lamp; 21. a display screen is touched.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
Example (b): referring to fig. 2, a durable testing arrangement of gas proportional valve, including air compressor 1, relief pressure valve 2, first ball valve 4, automatically controlled air-vent valve 6 and pneumatic switch valve, air compressor 1's gas outlet passes through the gas transmission pipeline and connects gradually relief pressure valve 2, first ball valve 4, automatically controlled air-vent valve 6 and pneumatic switch valve, the gas outlet of pneumatic switch valve is connected with at least one test branch road through the gas transmission pipeline, the test branch road includes second ball valve 10, the gas proportional valve 13 and the electromagnetic flowmeter 19 of awaiting measuring, the gas that the pneumatic switch valve flows out enters into the inlet end of the gas proportional valve 13 of awaiting measuring through second ball valve 10, the electromagnetic flowmeter 19 is connected to the gas outlet end of the gas proportional valve 13 of awaiting measuring, the secondary pressure gas outlet of the gas proportional valve 13 of awaiting measuring is connected with pressure switch 16. In this embodiment, the test branch road is provided with three groups, and three groups of test branch road parallel connection are in the rear side of pneumatic ooff valve, and correspondingly, three groups of test branch roads can realize the test to three gas proportional valve.
In addition, a pressure gauge 3 is provided between the pressure reducing valve 2 and the first ball valve 4, and is used for reading the pressure of the compressed air after being reduced by the pressure reducing valve 2. The two ends of the electric control pressure regulating valve 6 are respectively provided with a first pressure transmitter 5 and a second pressure transmitter 7 which are respectively used for detecting the pressures in front of and behind the electric control pressure regulating valve 6, and whether the electric control pressure regulating valve 6 regulates the pressure value of the compressed air to a target value can be judged through the detection value of the second pressure transmitter 7. The first pressure transmitter 5 and the second pressure transmitter 7 can convert the pressure signals into electric signals, and are convenient to collect and calculate.
The driving end of the pneumatic switch valve is connected to the rear side of the first ball valve 4 through an electromagnetic valve 8 for air intake, the electromagnetic valve 8 is used for controlling whether the pneumatic switch valve is ventilated, through the connection, the air intake driving of the pneumatic switch valve is also realized by the air compressor 1, compressed air is not required to be additionally provided, the on-off of an air path of the pneumatic switch valve can be realized through the electromagnetic valve 8, and therefore the action control of the pneumatic switch valve is realized.
As shown in fig. 3, the present embodiment further includes a control board, a microcontroller, a switching value output module DO, a switching value input module DI, an analog value acquisition module AD, a first communication module, and a second communication module are disposed in the control board, and the switching value output module, the switching value input module, the analog value acquisition module, the first communication module, and the second communication module are all connected to the microcontroller;
the first pressure transmitter 5 and the second pressure transmitter 7 are connected with the analog quantity acquisition module through analog signal lines to realize analog-to-digital conversion and input of pressure values;
the switching value output module is connected with a servo motor driver, the servo motor driver is connected with the electric control pressure regulating valve 6 and used for controlling the action of the electric control pressure regulating valve 6, the switching value output module is connected with a PWM speed regulating signal line and a direction signal in the servo motor driver, and the phase A and the phase B of the servo motor driver are connected with the electric control pressure regulating valve 6 to realize the control of the electric control pressure regulating valve 6; the switching value output module is also connected with the electromagnetic valve 8 and used for controlling the action of the electromagnetic valve 8; the switching value output module is also connected with a solid-state relay, one end of an output dry contact of the solid-state relay is connected with an AC220 live wire, and the other end of the output dry contact is connected with EV1 and EV2 ends of the fuel gas proportional valve 13 to be tested, so that the stop valve in the fuel gas proportional valve can be opened or closed; the switching value output module is also connected with a three-color alarm lamp 20 and a buzzer, and the three-color alarm lamp 20 comprises flashing lamps with three colors of red, yellow and green;
the switching value input module is connected with an alarm signal line of the pressure switch 16;
the first communication module is connected with the signal output end of the electromagnetic flowmeter 19, in this embodiment, the number of the test branches is three, the number of the corresponding electromagnetic flowmeters 19 is also three, the output signals of the three electromagnetic flowmeters 19 are all connected to the first communication module, the first communication module is further connected with a constant current source, and the output end of the constant current source is connected to the proportional current control end of the gas proportional valve 13 to be tested; the constant current source provides proportional current for the gas proportional valve to be tested and controls output current according to a micro-control program. In this embodiment, the first communication module is an RS485 communication module.
The second communication module is connected to the touch display screen 21 for information interaction, and in this embodiment, the second communication module is an RS232 communication module.
As shown in fig. 4, the overall configuration of the gas proportional valve durability testing device in the embodiment of the present invention may be made in the form of a machine tool, a rectangular bed is provided for installing and protecting the above features, wherein the pressure gauge 3 is provided outside the bed, the touch display screen 21 and the three-color alarm are provided on the top of the bed, the air compressor 1 is provided independently and connects compressed air to the relevant features through an air path, and the right arrow in fig. 4 is the air intake position and the air intake direction of the compressed air.
According to the gas proportional valve endurance testing device, air generated by the air compressor 1 is adjusted to the specified pressure used for testing through the electric control pressure regulating valve 6, the first pressure transmitter 5 and the second pressure transmitter 7, so that the pressure of airflow entering the gas proportional valve 13 to be tested tends to be constant, and the testing reliability is indirectly improved; the electromagnetic flowmeter 19 and the pressure switch 16 are respectively connected to the main output port and the secondary pressure outlet of the gas proportional valve, so that the outlet pressure and the outlet flow of the gas proportional valve 13 to be tested are detected, flow and pressure data are obtained, and comprehensive evaluation on the performance of the gas proportional valve 13 to be tested is facilitated; the utility model allows more than one test branch to be arranged to test a plurality of gas proportional valves at the same time, thereby improving the test efficiency of the gas proportional valves; in addition, through the control board and the associated characteristics thereof arranged in the utility model, the automatic test of the gas proportional valve can be realized, the test parameters such as the test period, the test times and the like can be flexibly set, and more test flexibility is provided.
The testing method for the gas proportional valve endurance test by using the gas proportional valve endurance testing device is that, in the embodiment, a certain european type gas proportional valve is taken as an example, a current-output pressure relation curve of the european type gas proportional valve is shown in fig. 5, when the proportional current is 0-150 mA, a certain output pressure is constant, when the proportional current is gradually increased from 150mA, the output pressure is also increased, the output pressure and the proportional current are approximately in a linear relation, and when the proportional current is increased to 300mA, the output pressure is constant. According to the relationship graph of the output pressure and the proportional current and the endurance test requirement of the proportional valve, a test method is designed, as shown in FIG. 6, in a test period, according to a time minimum change amount delta period _ res, the proportional current is synchronously increased from 150mA to a minimum increment delta current _ res, when the maximum current is 300mA, according to the time minimum change amount delta period _ res, the proportional current is synchronously decreased from 300mA to the minimum increment delta current _ res, when the proportional current is decreased to the minimum value 150mA, the proportional current is immediately controlled to be 0, the period interval period _ gap is kept, and then the test period is repeated.
The control method is realized through a program, and the generated binary code is burnt in a microcontroller of a circuit control board. After the program is started, user configuration is loaded firstly, and the user configuration comprises the test number of a gas proportional valve, a minimum proportional current set value current _ min, a maximum proportional current set value current _ max, a set test period, a set period interval period _ gap, a minimum proportional current increment delta current _ res, a target test frequency set _ num, a set pressure set value set _ pressure after an electric control regulating valve, and when the program runs, the current test frequency count is set, and the initial value is 0. After the user clicks a "start" button on the touch display screen, the program is executed, as shown in fig. 7, specifically including the following steps:
step 1: judging whether the intake pressure is less than a set pressure value set _ pressure, if so, skipping to the step 2, otherwise, skipping to the step 3, wherein the intake pressure is obtained by a first pressure transmitter;
step 2: the method comprises the following steps of displaying 'insufficient air inlet pressure' on a touch display screen, stopping running of a program, and displaying red color by a three-color alarm lamp and long-ringing of a buzzer;
and step 3: controlling the electric control pressure regulating valve to regulate the pressure and jumping to the step 4;
and 4, step 4: judging whether the rear pressure value of the electric control pressure regulating valve reaches a set test pressure value set _ pressure, if so, jumping to the step 5, otherwise, jumping to the step 3, wherein the rear pressure value of the electric control pressure regulating valve is obtained by a second pressure transmitter;
and 5: controlling a solid-state relay, electrifying the gas proportional valve AC220, and skipping to the step 6;
step 6: first half cycleStarting timing, setting initial value T0Jumping to step 7 as period/2;
and 7: constant current source outputs current at presentt＝currentt-1+ Δ current _ res × value _ num, where the current outputted at the initial time is current0Skipping to step 8 if current _ min × value _ num;
and 8: time is calculated as Tt＝Tt-1- Δ period _ res, wherein the initial time is T0＝period/2，
Δ period _ res ═ period/2)/(abs (current _ max-current _ min)/Δ current _ res), and the process skips to step 9;
and step 9: acquiring and storing a numerical value of the flow of an electromagnetic flowmeter connected with a main output port of the gas proportional valve to be tested and a measured value of a pressure switch connected with a secondary pressure port of the gas proportional valve to be tested, and skipping to the step 10;
step 10: if TtIf the value is less than 0, jumping to the step 11, otherwise returning to the step 7;
step 11: the timing of the next half cycle starts, with an initial value T0Jumping to step 12 as period/2;
step 12: constant current source outputs current at presentt＝currentt-1Δ current _ res × value _ num, where the current output at the initial time is current0Jumping to step 13, current _ max × value _ num;
step 13: time is calculated as Tt＝Tt-1- Δ period _ res, wherein the initial time is T0＝period/2，
Δ period _ res ═ period/2)/(abs (current _ max-current _ min)/Δ current _ res), and the process skips to step 14;
step 14: acquiring and storing a numerical value of the flow of an electromagnetic flowmeter connected with a main output port of the gas proportional valve to be tested and a measured value of a pressure switch connected with a secondary pressure port of the gas proportional valve to be tested, and jumping to the step 15;
step 15: if TtIf the value is less than 0, jumping to the step 16, otherwise returning to the step 12;
step 16: adding 1 to the current test time count, namely count + +, simultaneously displaying the test time on the touch display screen, wherein the value is the current test time count, and skipping to the step 17;
and step 17: controlling a solid-state relay to cut off the power of the gas proportional valve AC220, and skipping to the step 18;
step 18: starting timing, judging whether the time reaches a set period interval period _ gap, if so, jumping to a step 19, otherwise, continuing to the step 18;
step 19: judging whether the test time count reaches the target test time set _ num, if so, jumping to the step 20, otherwise, returning to the step 5;
step 20: the three-color alarm lamp displays red, the buzzer makes a long sound, and the touch display screen displays that the test is finished.
A pause button is arranged on the touch display screen, and when a user clicks the pause button on the touch display screen, the test device executes a pause program, as shown in fig. 8, specifically including the following steps:
step 101: judging whether the test period of the fuel gas proportional valve is finished or not, if so, skipping to the step 102, otherwise, continuing to the step 101;
step 102: controlling a solid-state relay to cut off the power of the gas proportional valve AC 220;
step 103: closing the current output of the constant current source;
step 104: the three-color alarm lamp displays yellow.
A stop button is arranged on the touch display screen, and after the stop button is touched, the test device executes a pause program stop program, as shown in fig. 9, the method specifically includes the following steps:
step 201: controlling a solid-state relay to cut off the power of the gas proportional valve AC 220;
step 202: closing the current output of the constant current source;
step 203: the three-color alarm lamp displays red;
step 204: the program stops running.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121917114.4U CN216144514U (en) | 2021-08-16 | 2021-08-16 | Gas proportional valve endurance test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121917114.4U CN216144514U (en) | 2021-08-16 | 2021-08-16 | Gas proportional valve endurance test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545848A (en) * | 2022-04-24 | 2022-05-27 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Servo motor endurance test process monitoring method and device and computer equipment |
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2021
- 2021-08-16 CN CN202121917114.4U patent/CN216144514U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545848A (en) * | 2022-04-24 | 2022-05-27 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Servo motor endurance test process monitoring method and device and computer equipment |
| CN114545848B (en) * | 2022-04-24 | 2022-08-16 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Servo motor endurance test process monitoring method and device and computer equipment |
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