CN112414700A - Electromagnetic valve performance testing device and testing method - Google Patents
Electromagnetic valve performance testing device and testing method Download PDFInfo
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- CN112414700A CN112414700A CN202011288088.3A CN202011288088A CN112414700A CN 112414700 A CN112414700 A CN 112414700A CN 202011288088 A CN202011288088 A CN 202011288088A CN 112414700 A CN112414700 A CN 112414700A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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Abstract
The invention relates to a performance testing device of an electromagnetic valve, which comprises: the pressure reducing valve is respectively connected with the gas source part and the stop valve, the inlet pipe orifice of the electromagnetic valve is connected with the stop valve, the outlet pipe orifice of the electromagnetic valve is connected with the flow meter, and the pressure difference meter is connected with the electromagnetic valve in parallel. The invention also relates to a method for testing the electromagnetic valve by using the electromagnetic valve performance testing device.
Description
Technical Field
The invention relates to the technical field of electromagnetic valves, in particular to a device and a method for testing the performance of an electromagnetic valve.
Background
The electromagnetic valve drives the valve core to move to open or close through electromagnetic force generated by electrifying and exciting a coil arranged in the electromagnetic valve. The solenoid valve includes valve body and solenoid, in order to ensure that the valve body of solenoid valve can normally open, normally close and the valve body does not have the condition of leaking when closing at the working process, need test its performance before using the solenoid valve, the capability test includes:
1. testing whether the electromagnetic valve can be normally opened and closed under the conditions that the differential pressure is 2.1MPa and the voltage is 85 percent of rated voltage;
2. testing whether the electromagnetic valve can be normally opened and closed under the conditions that the differential pressure is 0MPa and the voltage is 85 percent of rated voltage;
3. air with the pressure of 2.1MPa is input from the inlet end of the electromagnetic valve, and whether the leakage of the electromagnetic valve is less than 300mL/min or not is measured under the closing state of the electromagnetic valve.
However, the performance test technical scheme of the existing electromagnetic valve has the technical problems of low test efficiency and low test precision.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a device and a method for testing the performance of an electromagnetic valve.
In one aspect, the present invention provides a performance testing apparatus for an electromagnetic valve, including:
the air source part is used for providing an air source required by the test;
the pressure reducing valve is used for adjusting the test pressure required in the test process and is connected with the gas source part;
the stop valve is used for controlling the circulation of gas in the pipeline system, the gas passes when the stop valve is opened, the gas does not pass when the stop valve is closed, the stop valve is connected with the pressure reducing valve in series, and the pressure reducing valve is arranged between the gas source part and the stop valve;
the inlet pipe orifice of the valve body of the electromagnetic valve is connected with the stop valve, and the action of the valve body of the electromagnetic valve is controlled by an electromagnetic coil in the electromagnetic valve;
the differential pressure gauge is connected with the electromagnetic valve in parallel and used for testing the differential pressure at two ends of the electromagnetic valve and ensuring the differential pressure during testing;
and the flowmeter is used for recording the gas flow passing through the valve body in the testing process, feeding back flow data to be used for judging the testing result, and connecting the outlet pipe orifice of the valve body of the electromagnetic valve with the flowmeter.
The device for testing the performance of the electromagnetic valve further comprises a PLC control module, wherein the PLC control module is connected with the electromagnetic valve and the stop valve, the PLC control module controls the on-off of the electromagnetic valve and the on-off of the stop valve, the PLC control module is also in communication connection with the flowmeter, and the PLC control module judges whether the test data of the flowmeter are qualified or not.
The gas source part can adopt a gas cylinder internally provided with compressed gas, and can also adopt other devices meeting the requirement of testing pressure, such as a booster pump.
In another aspect, the present invention provides a method for testing an electromagnetic valve by using the testing apparatus, wherein the testing method includes the steps of:
after the electromagnetic valve is opened for at least 3s under the pressure difference of 0MPa and the voltage of 85 percent of rated voltage, the stop valve is opened and then air is introduced to the electromagnetic valve, the pressure of the introduced air is equal to the maximum pressure difference which can be borne by the electromagnetic valve, and the flow meter tests the flow of the valve body of the electromagnetic valve;
after the electromagnetic valve is powered off for at least 3 seconds, opening the stop valve and then introducing air to the electromagnetic valve, wherein the pressure of the introduced air is equal to the maximum pressure difference which can be borne by the electromagnetic valve, and the flowmeter tests the flow of a valve body of the electromagnetic valve;
and after the electromagnetic valve is opened for at least 3S when the maximum differential pressure and the voltage are 85% of the rated voltage, the flow meter tests the flow of the valve body, and then after the electromagnetic valve is powered off for at least 3S, the flow meter tests the flow of the valve body of the electromagnetic valve.
The invention provides a testing method, wherein in the process of testing an electromagnetic valve, a PLC control module can automatically judge a testing result by reading the numerical value of a flowmeter.
In one embodiment, the maximum pressure difference that the solenoid valve can bear is 2.1MPa, and the specific determination criteria for the performance test of the solenoid valve are as follows: opening the electromagnetic valve for 3s under the conditions that the differential pressure is 0MPa and the voltage is 85 percent of rated voltage, then opening the stop valve and introducing air with the pressure of 2.1MPa to the electromagnetic valve, wherein at the moment, the flow of a valve body of the electromagnetic valve is not less than 300L/min; after the electromagnetic valve is powered off for 3 seconds, opening the stop valve and then introducing air with the pressure of 2.1MPa to the electromagnetic valve, wherein the flow of a valve body of the electromagnetic valve is less than 300 mL/min; thirdly, after the electromagnetic valve is opened for 3S under the pressure difference of 2.1MPa and the voltage of 85 percent of rated voltage, the flow of the valve body of the electromagnetic valve is not less than 300L/min at the moment, then the electromagnetic valve is powered off for 3S, and at the moment, the flow of the valve body of the electromagnetic valve is less than 300 mL/min. The electromagnetic valve is judged according to the standard when normally opened: the electromagnetic valve is in an open state under the power-on state, and the flow of the electromagnetic valve is not less than 300L/min under the air pressure of 2.1 MPa. The judgment standard when the electromagnetic valve is normally closed is as follows: the electromagnetic valve is closed when the power is off, and the flow of the electromagnetic valve is less than 300mL/min under the air pressure of 2.1 MPa.
The invention provides a testing method, in the testing process of an electromagnetic valve, the performance of the electromagnetic valve can be judged to be qualified only if the results of all testing items are qualified.
Compared with the prior art, the technical scheme provided by the invention has the following technical effects:
1. the electromagnetic valve is tested by using the testing device provided by the invention, one set of testing device can test various performances of the electromagnetic valve, the testing efficiency is high, the testing device automatically judges a testing result, and the judgment of the reading of a tester is not needed;
2. the testing device monitors the flow of the electromagnetic valve in an open valve state or a closed valve state through the flowmeter, so that the testing result is more accurate;
3. the testing device can accurately control the air pressure value of air communicated to the electromagnetic valve through the pressure reducing valve and the differential pressure gauge.
The following description will be given with reference to specific examples.
Drawings
Fig. 1 is a schematic structural diagram of a performance testing apparatus (not including a PLC control module) for an electromagnetic valve according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a testing method according to an embodiment of the present invention.
The figure includes: 1. a gas cylinder; 21. a first pressure reducing valve; 22. a second pressure reducing valve; 31. a first shut-off valve; 32. a second stop valve; 4. a differential pressure gauge; 5. an electromagnetic valve; 6. a flow meter.
Detailed Description
To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Referring to fig. 1, the performance testing device for the electromagnetic valve provided by the embodiment includes a gas cylinder 1 for providing a tested gas source, the gas cylinder 1 is respectively connected with a first reducing valve 21 and a second reducing valve 22, the first reducing valve 21 is connected with a first stop valve 31 in series, the second reducing valve 22 is connected with a second stop valve 32 in series, a pipe inlet of a valve body of the electromagnetic valve 5 is respectively connected with the first stop valve 31 and the second stop valve 32, a pipe outlet of the valve body of the electromagnetic valve 5 is connected with a flow meter 6, and a differential pressure meter 4 is connected with the electromagnetic valve 5 in parallel.
The solenoid valve capability test device that this embodiment provided still includes PLC control module, PLC control module and solenoid valve 5 are connected, PLC control module simultaneously respectively with first stop valve 31, second stop valve 32 is connected, PLC control module controls solenoid valve 5's break-make, the break-make of first stop valve 31 and the break-make of second stop valve 32, PLC control module still with flowmeter 6 communication connection, PLC control module judges whether flowmeter 6's test data is qualified. In this embodiment, the PLC control module adopts the PLC control module disclosed in the prior art and applicable to the control of the solenoid valve and the stop valve and the data reading of the flow meter.
The performance test of the electromagnetic valve 5 by using the testing device provided by the embodiment comprises the following steps:
step one, opening the gas cylinder, controlling the first stop valve 31 and the electromagnetic valve 5 to be opened through the PLC control module, and adjusting the first reducing valve 21 to enable the pressure difference between two ends of the electromagnetic valve 5 to be 2.1MPa, wherein the pressure difference between two ends of the electromagnetic valve is 2.1MPa at the moment. Then, the first stop valve 31 is closed, the second stop valve 32 is opened, and the second pressure reducing valve 22 is adjusted so that the pressure difference between both ends of the electromagnetic valve 5 is 2.1MPa, and at this time, the pressure difference between both ends of the electromagnetic valve is 2.1 MPa. In the above process, if the value regulated by the first pressure reducing valve 21 is equal to the value displayed by the differential pressure gauge 4 and the value regulated by the second pressure reducing valve 22 is equal to the value displayed by the differential pressure gauge 4, it indicates that the testing device is normal, and the performance test of the electromagnetic valve 5 is started;
step two, starting the test, closing the first stop valve 31 and the second stop valve 32, enabling the electromagnetic valve 5 to have no gas passing through, enabling the pressure to be 0MPa, closing the electromagnetic valve 5 at the moment, opening the second stop valve 32 after the electromagnetic valve 5 is completely closed after 3S, testing the leakage Q1 of the electromagnetic valve 5 under the pressure of 2.1MPa, and if Q1 is more than or equal to 300mL/min, determining that the leakage of the electromagnetic valve 5 is unqualified, and stopping the test; if Q1 is less than 300mL/min, the electromagnetic valve 5 is normally closed and the leakage amount is qualified, and the next step is carried out.
Step three, closing the second stop valve 32, enabling no gas to pass through the electromagnetic valve 5, enabling the pressure to be 0MPa, opening the electromagnetic valve 5 at the moment, opening the second stop valve 32 after the electromagnetic valve 5 is opened completely after 3S, testing the flow Q2 of the electromagnetic valve 5 under the pressure of 2.1MPa, and if Q2 is less than or equal to 300L/min, determining that the flow of the electromagnetic valve 5 is unqualified, and stopping testing; if Q2 is more than 300L/min, the electromagnetic valve 5 is normally opened, and the next step is carried out.
Step four, the electromagnetic valve 5 is in an open state, the second stop valve 32 is closed, the first stop valve 31 is opened, the gas pressure difference between two ends of the electromagnetic valve 5 is 2.1MPa, the electromagnetic valve 5 is closed at the moment, after the electromagnetic valve 5 is completely closed, the first stop valve 31 is closed, the second stop valve 32 is opened, the leakage Q3 of the closed electromagnetic valve 5 is tested after 3S, if Q3 is more than or equal to 300mL/min, the leakage of the electromagnetic valve 5 is unqualified, and the test is stopped; if Q3 is less than 300mL/min, the electromagnetic valve 5 is normally closed and the leakage amount is qualified, and the next step is carried out.
Step five, at the moment, the electromagnetic valve 5 is in a closed state, the gas pressure at two ends of the electromagnetic valve 5 is 2.1MPa, the electromagnetic valve 5 is opened under the pressure, the flow Q4 of the electromagnetic valve 5 is recorded after the electromagnetic valve 5 is completely opened, if Q4 is less than or equal to 300L/min, the flow of the electromagnetic valve 5 is unqualified, and the test is stopped; if Q4 is more than 300L/min, the electromagnetic valve 5 is normally opened, the test is finished, and the sample is qualified.
In this embodiment, the reason why the pressure difference between both ends of the electromagnetic valve 5 is adjusted to 2.1MPa is to confirm whether the valve body can be normally closed when the pressure difference is 2.1MPa when the electromagnetic valve 5 is opened.
In the present embodiment, Q1 and Q3 function to confirm whether the solenoid valve 5 has been normally closed, and Q2 and Q4 function to confirm whether the solenoid valve 5 has been normally opened. The four sets of data Q1, Q2, Q3 and Q4 were tested under different conditions.
The following describes the effects of the steps of the test method provided in this example:
the first step is used for adjusting the pressure required by the test to meet the test requirement;
the second step is used for testing whether the electromagnetic valve 5 can be normally closed under the air pressure of 0 MPa;
the third step is used for testing whether the electromagnetic valve 5 can be normally opened under the air pressure of 0 MPa;
the fourth step is used for testing whether the electromagnetic valve 5 can be normally closed under the action of the pressure difference of 2.1 MPa;
and the fifth step is used for testing whether the electromagnetic valve 5 can be normally opened under the action of the pressure difference of 2.1 MPa.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A performance testing device for an electromagnetic valve is characterized by comprising: air supply portion, relief pressure valve, stop valve, solenoid valve, differential pressure gauge and flowmeter, the relief pressure valve respectively with air supply portion and the stop valve is connected, the inlet tube mouth of solenoid valve with the stop valve is connected, the outlet tube mouth of solenoid valve with the flowmeter is connected, the differential pressure gauge with the solenoid valve is parallelly connected.
2. The apparatus according to claim 1, wherein the pressure reducing valve includes a first pressure reducing valve and a second pressure reducing valve, the shutoff valve includes a first shutoff valve and a second shutoff valve, the gas source portion is connected to the first pressure reducing valve and the second pressure reducing valve, the first pressure reducing valve is connected to the first shutoff valve in series, the second pressure reducing valve is connected to the second shutoff valve in series, and the inlet of the solenoid valve is connected to the first shutoff valve and the second shutoff valve, respectively.
3. The solenoid valve performance testing device according to claim 2, further comprising a PLC control module, wherein the PLC control module is connected to the solenoid valve, and is connected to the first stop valve and the second stop valve, respectively, and controls on/off of the solenoid valve, on/off of the first stop valve, and on/off of the second stop valve.
4. The solenoid valve performance testing device of claim 3, wherein the PLC control module is in communication with the flow meter.
5. The solenoid valve performance testing device of claim 4, wherein the gas source portion comprises a gas cylinder.
6. A method of testing a solenoid valve using the solenoid valve performance testing apparatus according to any one of claims 1 to 5, comprising the steps of:
after the electromagnetic valve is opened for at least 3s under the conditions that the differential pressure is 0MPa and the voltage is 85% of the rated voltage, air is introduced to the electromagnetic valve after the stop valve is opened, the pressure of the introduced air is equal to the maximum differential pressure capable of being borne by the electromagnetic valve, and the flow meter tests the valve body flow of the electromagnetic valve;
after the electromagnetic valve is powered off for at least 3 seconds, opening the stop valve and then introducing air to the electromagnetic valve, wherein the pressure of the introduced air is equal to the maximum pressure difference capable of being borne by the electromagnetic valve, and the flowmeter tests the valve body flow of the electromagnetic valve;
and after the electromagnetic valve is opened for at least 3S when the maximum differential pressure and the voltage are 85% of the rated voltage, the flow meter tests the flow of the valve body, and then after the electromagnetic valve is powered off for at least 3S, the flow meter tests the flow of the valve body of the electromagnetic valve.
7. The method according to claim 6, wherein after the electromagnetic valve is opened for 3s under the conditions that the differential pressure is 0MPa and the voltage is 85% of the rated voltage, air with the pressure of 2.1MPa is introduced into the electromagnetic valve after the stop valve is opened, and the electromagnetic valve is judged to be qualified if the flow rate of a valve body of the electromagnetic valve is not less than 300L/min.
8. The method according to claim 6, characterized in that after the electromagnetic valve is powered off for 3S, air with the pressure of 2.1MPa is introduced into the electromagnetic valve after the stop valve is opened, and the electromagnetic valve is judged to be qualified if the flow of a valve body of the electromagnetic valve is less than 300 mL/min.
9. The method according to claim 6, characterized in that after the electromagnetic valve is opened for 3s under the pressure difference of 2.1MPa and the voltage of 85% of the rated voltage, the flow rate of the valve body of the electromagnetic valve is not less than 300L/min, and the electromagnetic valve is judged to be qualified.
10. The method according to claim 9, characterized in that after the electromagnetic valve is opened for 3S under the pressure difference of 2.1MPa and the voltage of 85% of the rated voltage, the electromagnetic valve is powered off for 3S, and the electromagnetic valve is judged to be qualified if the flow rate of the valve body of the electromagnetic valve is less than 300 mL/min.
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| CN202011288088.3A CN112414700A (en) | 2020-11-17 | 2020-11-17 | Electromagnetic valve performance testing device and testing method |
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| CN202011288088.3A CN112414700A (en) | 2020-11-17 | 2020-11-17 | Electromagnetic valve performance testing device and testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183206A (en) * | 2023-04-23 | 2023-05-30 | 余姚市三力信电磁阀有限公司 | Gas detection system and method for ultrahigh-pressure electromagnetic valve |
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| CN101846536A (en) * | 2010-05-27 | 2010-09-29 | 中国计量学院 | Device and method for measuring flow of electronic expansion valve |
| KR101418370B1 (en) * | 2013-08-26 | 2014-07-11 | 주식회사 에네스지 | A Test Block Apparatus For Solenoid Valve And A Test Method Using Of It |
| CN107917803A (en) * | 2018-01-09 | 2018-04-17 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of fuel solenoid valve test platform and test method |
| CN214251519U (en) * | 2020-11-17 | 2021-09-21 | 格力电器（武汉）有限公司 | Solenoid valve capability test device |
-
2020
- 2020-11-17 CN CN202011288088.3A patent/CN112414700A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846536A (en) * | 2010-05-27 | 2010-09-29 | 中国计量学院 | Device and method for measuring flow of electronic expansion valve |
| KR101418370B1 (en) * | 2013-08-26 | 2014-07-11 | 주식회사 에네스지 | A Test Block Apparatus For Solenoid Valve And A Test Method Using Of It |
| CN107917803A (en) * | 2018-01-09 | 2018-04-17 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of fuel solenoid valve test platform and test method |
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| CN116183206A (en) * | 2023-04-23 | 2023-05-30 | 余姚市三力信电磁阀有限公司 | Gas detection system and method for ultrahigh-pressure electromagnetic valve |
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