Comprehensive performance test system for pneumatic electromagnetic valve

Abstract

The invention relates to a pneumatic solenoid valve comprehensive performance test system, a process system is provided with a driving gas circuit and a plurality of working gas circuits, and the driving gas circuit is connected with an external gas supply source, serves as a gas supply switch of the process system and adjusts driving gas pressure of valves in the plurality of working gas circuits; the various working gas circuits are used for performing pressure boosting, pressure reducing, pressure maintaining and exhaust operations on the to-be-tested solenoid valve product, so that various test working condition requirements of the to-be-tested solenoid valve under a load condition are met, and pressure data of the working gas circuits are monitored and fed back to the comprehensive measurement and control system; and the comprehensive measurement and control system is used for setting an automatic test program, setting the pressure of a valve in the process system, collecting pressure data fed back by the process system for analysis and processing, obtaining a dynamic response current action curve of a to-be-tested electromagnetic valve product and automatically interpreting key data. According to the invention, the test requirements under various production modes such as development and batch production are met, the system flexibility is high, and the multi-channel analysis and test capabilities are realized.

Description

Technical Field

[0001] This invention belongs to the field of automated testing technology and relates to a comprehensive performance testing system for pneumatic solenoid valves. Background Technology

[0002] Pneumatic solenoid valves are an important component of attitude and orbit control engines. Their basic working principle is as follows: an electromagnetic coil provides suction to the armature, opening the pneumatic passage and subsequently controlling the main hydraulic valve core to control the flow or cut off of propellant, thus providing power to the attitude and orbit control engine. Therefore, the performance of pneumatic solenoid valves directly affects the reliability of aerospace products, and their main performance tests include responsiveness testing, sealing checks, and life testing.

[0003] In existing technologies, the inspection and testing of solenoid valves requires frequent switching between different testing procedures such as response performance, sealing performance, and life testing. The testing and recording processes largely rely on manual labor or personnel support, resulting in low testing efficiency, poor accuracy, and complex operation. While some existing testing equipment can achieve a certain degree of automation, the following technical challenges remain:

[0004] The invention patent (CN201810482095) discloses a fully automated testing device for the electrical performance of solenoid valves. By controlling the switching of the internal relay matrix through an industrial control computer, the device can automatically test the electrical performance of the valve under test by performing only one cable clamping operation, including pull-in voltage (no-load and under load) and response time (no-load and under load). The device is designed with multi-level relays as the basic structure, and each test module is relatively independent. Although it can automatically collect electrical performance-related data by switching the relay matrix, the system lacks flexibility and is difficult to adapt to the debugging needs of various types and operating conditions of pneumatic solenoid valves through expansion modules. In fact, this control and acquisition method can hardly meet the full-process inspection test of each quadrant of four-machine solenoid valves.

[0005] The solenoid valve comprehensive performance inspection bench disclosed in patent (CN201821405283) includes an industrial all-in-one machine, a main control board, and multiple external control modules. The inspection bench achieves automated control of test processes such as electrical performance testing, sealing testing, and durability testing through an architecture where the host computer controls the slave computer. However, like the invention patent (CN201810482095), it only analyzes the stable state before and after the action, such as pull-in voltage, release current, and response time, through the electrical performance acquisition module, without considering the dynamic response process of the solenoid valve (current change curve, coil trigger current, etc.).

[0006] Patent (CN201020297675) discloses a PC-controlled comprehensive performance testing device for pneumatic solenoid valves. This device mainly consists of a PC, a data acquisition and control module, an air source, and an air path system. It can automatically test various dynamic characteristics, sealing performance, fatigue life, and other properties of solenoid valves. The device's working principle is to rely on data uploaded by a pressure sensor to determine the dynamic characteristics and other properties of the solenoid valve. Essentially, it possesses the ability to acquire pressure information during the test process. Furthermore, patent (CN201220544945) discloses a comprehensive performance testing system for high-durability switching solenoid valves. Although it mentions measuring the opening and closing action times of the solenoid valve, it also uses data from photoelectric sensors to indirectly obtain the valve's dynamic characteristics, which is insufficient to meet the accuracy requirements for dynamic characteristic testing of pneumatic solenoid valves. Summary of the Invention

[0007] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a comprehensive performance testing system for pneumatic solenoid valves, which can achieve: 1. meeting the testing requirements of various production modes such as research and development and mass production, with high system flexibility, multi-channel analysis and testing capabilities, and meeting the full-process inspection and testing of each quadrant of the solenoid valve; 2. obtaining accurate information on the dynamic response process of the solenoid valve (current change curve, coil trigger current, etc.), meeting the requirements of pneumatic solenoid valves for dynamic characteristic detection accuracy.

[0008] The solution to the technical problem of this invention is: a comprehensive performance testing system for pneumatic solenoid valves, comprising a test bench, a process system, and a comprehensive measurement and control system;

[0009] The test bench is used for human-machine interaction, provides a connection port for testing the electrical performance of the solenoid valve under test, and also provides an installation carrier for the process system and the integrated measurement and control system.

[0010] The process system is the gas path part of the test system, which is equipped with a drive gas path and multiple working gas paths. The drive gas path is connected to an external gas supply source, which acts as the gas supply switch of the process system and regulates the drive gas pressure of the valves in the multiple working gas paths. The multiple working gas paths are used to perform pressure boosting, pressure reduction, pressure holding and exhaust operations on the solenoid valve under test, so as to meet the various test conditions of the solenoid valve under test under load conditions, monitor the pressure data of the working gas paths and feed them back to the integrated measurement and control system.

[0011] The integrated measurement and control system is the electrical control part of the test system. It is used to supply power to the test system and the solenoid valve product under test, set the automated test program, set the pressure of the valve in the process system, collect and analyze the pressure data fed back by the process system, obtain the dynamic response current action curve of the solenoid valve product under test, and automatically interpret key data, including steady-state current Iy, pull-in trigger current Icd, pull-in trigger time Tcd, pull-in motion time Tyd, pull-in time Txh, release trigger current Icd", release trigger time Tcd", release motion time Tyd", and release time Tsf.

[0012] Furthermore, the process system includes a drive gas path and a working gas path;

[0013] The drive air circuit includes a shut-off valve A, a filter A, a 30MPa pressure transmitter, a manual pressure reducing valve, a 1.6MPa pressure gauge, a filter regulator, a 1.1MPa safety valve, a 1MPa pressure transmitter, an air manifold, and eight two-position three-way solenoid valves connected in sequence.

[0014] The shut-off valve A serves as the gas supply switch for the process system; the filter A filters the source gas; the 30MPa pressure transmitter monitors the driving gas pressure; the 1.6MPa pressure gauge observes the pressure after pressure reduction by the manual pressure reducing valve to avoid damaging the filter regulator; the filter regulator filters the driving gas and further adjusts the driving gas pressure; the 1.1MPa safety valve prevents overpressure of the driving gas; the gas collection pipe ensures the gas supply capacity of the driving gas path; the eight two-position three-way solenoid valves are respectively used to control the electronic pressure reducing valve A, electronic pressure reducing valve B, pneumatic switch valve A, pneumatic switch valve B, pneumatic switch valve C, pneumatic switch valve D, pneumatic switch valve E, and pneumatic switch valve F in the working gas path;

[0015] The working gas path includes a first high-pressure working gas path, a second high-pressure working gas path, and a low-pressure working gas path;

[0016] The first high-pressure working air circuit branches off after the shut-off valve A and filter A, and connects in sequence to the shut-off valve B, electronic pressure reducing valve A, 20MPa pressure transmitter, pneumatic switch valve A, 20MPa pressure transmitter and pressure gauge, and filter B.

[0017] The second high-pressure working air circuit branches off after the shut-off valve A and filter A, and connects in sequence to the shut-off valve C, electronic pressure reducing valve B, 15MPa pressure transmitter, pneumatic switch valve B, 15MPa pressure transmitter and pressure gauge, and filter C.

[0018] The low-pressure working air circuit branches off after the shut-off valve A and filter A, and connects in sequence to the shut-off valve D, manual pressure reducing valve, 1.6MPa pressure gauge, 1.1MPa safety valve, electric proportional valve, pressure stabilizing tank, 1MPa pressure transmitter, pneumatic switch valve C, 1MPa pressure transmitter and pressure gauge, and filter D.

[0019] In the first and second high-pressure working gas circuits, shut-off valves B and C are used for working circuit selection; electronic pressure reducing valves A and B are used for pressure boosting and depressurization operations; 20MPa and 15MPa pressure transmitters are used for pressure monitoring and feedback after pressure reduction; pneumatic switching valves A and B are used for working circuit pressure holding and venting; 20MPa and 15MPa pressure transmitters and gauges are used for working circuit pressure monitoring and feedback; and filters B and C are used for working circuit gas filtration.

[0020] In the low-pressure working gas circuit, shut-off valve D is used for working circuit selection; the manual pressure reducing valve is compensated for pressure reduction control through an electro-proportional valve, realizing self-closed-loop control of the proportional valve to ensure pressure control and accuracy of the low-pressure working gas circuit; a 1.6MPa pressure gauge is used to observe the pressure after pressure reduction by the manual pressure reducing valve; a 1.1MPa safety valve is used to prevent overpressure in the low-pressure circuit; a pressure stabilizing tank is used to buffer pressure fluctuations in the low-pressure circuit; a pneumatic switch valve C is used for pressure maintenance and venting in the working circuit; a 1MPa pressure transmitter and pressure gauge are used for monitoring and feedback of the working circuit pressure; and filter D is used for gas filtration in the working circuit.

[0021] Furthermore, the process system also includes an exhaust gas path;

[0022] The exhaust gas path branches off after shut-off valve A and filter A and connects to shut-off valve E to release the gas pressure of the process system.

[0023] In the first high-pressure working air circuit, a branch line is branched off from the pneumatic switch valve A and the 20MPa pressure transmitter and pressure gauge to connect to the pneumatic switch valve D, and then connected in parallel with the pneumatic switch valve D to the shut-off valve F, and finally connected to the rear end of the shut-off valve E in the exhaust air circuit.

[0024] In the second high-pressure working air circuit, a branch line is branched off between the pneumatic switch valve B and the 15MPa pressure transmitter and pressure gauge, connecting to the pneumatic switch valve E. The branch line is then connected in parallel with the pneumatic switch valve E to the shut-off valve G, and finally connected to the rear end of the shut-off valve E in the exhaust air circuit.

[0025] In the low-pressure working air circuit, a branch line is connected between the pneumatic switch valve C and the 1MPa pressure transmitter and pressure gauge to the pneumatic switch valve F, and then connected in parallel with the pneumatic switch valve F to the shut-off valve H, which is finally connected to the rear end of the shut-off valve E in the exhaust air circuit.

[0026] Furthermore, the upper half of the test bench is equipped with an integrated measurement and control system, while the lower half is equipped with a process system, thus isolating the electrical control section from the pneumatic section.

[0027] The test bench has an air supply interface on one side and an electrical performance test interface, a first high-pressure working air circuit interface, a second high-pressure working air circuit interface, and a low-pressure working air circuit interface on the other side. The solenoid valve product under test is electrically connected to the integrated measurement and control system through the electrical performance test interface, and is connected to the process system through the first high-pressure working air circuit interface, the second high-pressure working air circuit interface, and the low-pressure working air circuit interface.

[0028] Furthermore, the integrated measurement and control system includes a data acquisition unit, a PC and peripherals, a PLC, a switching power supply, a first solid-state relay, a linear power supply, a valve control box, and a second solid-state relay.

[0029] The data acquisition unit is used to acquire pressure data from 30MPa pressure transmitters, 1MPa pressure transmitters, 20MPa pressure transmitters, 20MPa pressure transmitters and pressure gauges, 15MPa pressure transmitters, 15MPa pressure transmitters and pressure gauges, 1MPa pressure transmitters and pressure gauges, and to record and monitor the dynamic response current data of the solenoid valve products under test.

[0030] The PC and peripherals are used for human-computer interaction, PLC control and analysis and processing of data transmitted back from the data acquisition unit, and automatically interpret key data of the dynamic response current action curve.

[0031] The PLC uses a first solid-state relay and eight two-position three-way solenoid valves to set the pressure of electronic pressure reducing valves and electro-proportional valves, and to open or close pneumatic switching valves and solenoid valves under test.

[0032] The switching power supply is used to power the data acquisition unit, PC and peripherals, and PLC;

[0033] The linear power supply is used to regulate the voltage and enable the solenoid valve product under test.

[0034] The valve control box is connected to the solenoid valve product under test and transmits the dynamic response current information of the solenoid valve product under test back to the data acquisition unit.

[0035] The second solid-state relay is used to enable multi-channel access of the solenoid valve product under test, so that the test system has multi-channel testing capability.

[0036] Furthermore, the PLC includes a CPU, a communication module, an AO module, and a DO module;

[0037] The communication module is used for data communication between the PLC and electronic pressure reducing valve A, electronic pressure reducing valve B, and the linear power supply; the AO module is used to control the electro-proportional valve; the DO module realizes the pressure setting of electronic pressure reducing valve A and electronic pressure reducing valve B in the test system, as well as the switching action of pneumatic switching valves A, B, C, D, E, and F, through the first solid-state relay and eight two-position three-way solenoid valves.

[0038] Furthermore, the integrated measurement and control system also includes a PWM module. The DO module controls the PWM module to realize the power on and off of the solenoid valve under test at the millisecond level, meeting the automated testing requirements of valve core life test.

[0039] Furthermore, the valve control box includes a high-precision sampling resistor and a freewheeling diode;

[0040] The high-precision sampling resistor is connected in series in the coil circuit of the solenoid valve under test to transmit the dynamic response current information of the solenoid valve under test back to the data acquisition unit; the freewheeling diode is connected in parallel in the coil circuit of the solenoid valve under test for circuit protection.

[0041] Furthermore, the process for the pneumatic four-machine solenoid valve product performance testing using the aforementioned testing system is as follows:

[0042] After confirming that the gas supply source and equipment power supply are properly connected to the test system, determine whether it is necessary to connect the first high-pressure working gas path and the second high-pressure working gas path according to the process requirements of the solenoid valve under test. Confirm that the lead wires of the four quadrants of the solenoid valve under test are connected to the electrical performance test connection port in sequence. Under no-load conditions, the solenoid valve under test does not need to be connected to the various gas paths of the process system. Under load conditions, the solenoid valve under test is connected to the first high-pressure working gas path, and the second high-pressure working gas path and the low-pressure working gas path are selected to be connected according to different operating conditions.

[0043] Open shut-off valve A to introduce high-pressure gas into the test system, and select the circuit using shut-off valves B and C according to the test requirements;

[0044] The inflation rate, holding time, deflation rate, number of switching operations, time interval, and whether to perform electrical performance tests can be set via PC and peripherals;

[0045] The PC communicates with the data acquisition unit and PLC. The PLC controls the drive air circuit and then controls the electronic pressure reducing valve and pneumatic switching valve. Based on whether the dynamic response current action curve needs to be output, it determines whether the coil circuit of the solenoid valve under test needs to go through the valve control box. The host computer controls the linear power supply, adjusts the voltage and enables it.

[0046] The test program is executed automatically, and the data transmitted back by the pressure transmitter is used for automatic closed-loop regulation to complete the automatic interpretation of the dynamic response data of the solenoid valve.

[0047] After the test, the exhaust operation was carried out.

[0048] Furthermore, the procedure for testing the opening and closing pressures of the non-pneumatic solenoid valve using the aforementioned testing system is as follows:

[0049] After confirming that the gas supply source and equipment power supply are properly connected to the test system, according to the process requirements of the solenoid valve product under test, if the solenoid valve product under test is to be tested for opening / closing or the gas distribution pressure is less than 0.1MPa, the solenoid valve product under test needs to be connected to the low-pressure working gas circuit.

[0050] Open shut-off valve A to introduce high-pressure gas into the test system, and use shut-off valve D to select the circuit according to the test requirements;

[0051] The inflation rate, holding time, and deflation rate can be set via PC and peripherals.

[0052] The PC communicates with the data acquisition unit and PLC, and the PLC controls the drive air circuit, thereby controlling the electronic pressure reducing valve and the pneumatic switching valve.

[0053] Extend the outlet hose of the solenoid valve product under test into a container filled with anhydrous ethanol.

[0054] When bubbles are observed to be generated or disappear in the container, the opening / closing pressure data of the solenoid valve under test is recorded.

[0055] The advantages of this invention compared to the prior art are:

[0056] (1) The pneumatic solenoid valve comprehensive performance testing system of the present invention can realize the simultaneous inspection and testing of multiple pneumatic solenoid valves / four-machine solenoid valves. The valve under test only needs to be clamped with the device once to complete the dynamic response performance (dynamic response curve of electromagnetic coil, steady-state current, pull-in / release current, pull-in / release contact time, pull-in / release movement time, pull-in / release time), life test, coil temperature rise test, etc.

[0057] (2) The pneumatic solenoid valve comprehensive performance testing system of the present invention can flexibly set the test items and is widely applicable to pneumatic solenoid valves in attitude and track control engines, including two-wire solenoid valves, four-wire solenoid valves and four-machine solenoid valves.

[0058] (3) The pneumatic solenoid valve comprehensive performance testing system of the present invention can assist the operator in completing load tests during the assembly and inspection process of the pneumatic solenoid valve, such as air tightness test, action flexibility test, stroke measurement, valve core opening pressure test, pressure holding test, etc.

[0059] (4) The pneumatic solenoid valve comprehensive performance testing system of the present invention controls the lower computer through the upper computer, has good human-computer interaction function, automatically interprets key parameters, displays them in real time and generates reports. It can test the performance indicators of solenoid electromagnets of different specifications. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the composition of a comprehensive performance testing system for a pneumatic solenoid valve according to the present invention;

[0061] Figure 2 This is a schematic diagram of the test bench structure of the comprehensive performance testing system for pneumatic solenoid valves according to the present invention;

[0062] Figure 3 This is a schematic diagram of the process system structure of a comprehensive performance testing system for a pneumatic solenoid valve according to the present invention;

[0063] Figure 4 This is a schematic diagram of the integrated measurement and control system structure of the pneumatic solenoid valve comprehensive performance testing system of the present invention;

[0064] Figure 5 This is a schematic diagram of the dynamic response current action curve of a pneumatic solenoid valve comprehensive performance testing system according to the present invention;

[0065] Figure 6 This is a schematic diagram of the valve control box structure of a pneumatic solenoid valve comprehensive performance testing system according to the present invention. Detailed Implementation

[0066] This invention proposes a comprehensive performance testing system for pneumatic solenoid valves, which can flexibly set test items and is widely applicable to pneumatic solenoid valves in attitude and orbit control engines, including two-wire solenoid valves, four-wire solenoid valves, and four-machine solenoid valves. It can assist operators in completing load tests during the assembly and inspection process of pneumatic solenoid valves, such as airtightness checks, agility checks, stroke measurements, valve core opening pressure tests, and pressure holding tests.

[0067] The present invention discloses a comprehensive performance testing system for pneumatic solenoid valves. The system controls the lower-level computer through the upper computer, has good human-computer interaction functions, can select automatic control and manual control, automatically interpret and display key parameters in real time and generate reports, and can realize functions such as real-time display, acquisition, storage, playback and fixed format output of multi-channel data, so as to meet the needs of various stages of research and development and mass production.

[0068] Specifically, such as Figure 1 As shown, the testing system includes a test bench, a process system, and a comprehensive measurement and control system;

[0069] The test bench is used for human-machine interaction, provides a connection port for testing the electrical performance of the solenoid valve under test, and also provides an installation carrier for the process system and the integrated measurement and control system.

[0070] The process system is the gas path part of the test system, which is equipped with a drive gas path and multiple working gas paths. The drive gas path is connected to an external gas supply source, which acts as the gas supply switch of the process system and regulates the drive gas pressure of the valves in the multiple working gas paths. The multiple working gas paths are used to perform pressure boosting, pressure reduction, pressure holding and exhaust operations on the solenoid valve under test, so as to meet the various test conditions of the solenoid valve under test under load conditions, monitor the pressure data of the working gas paths and feed them back to the integrated measurement and control system.

[0071] The integrated measurement and control system is the electrical control part of the test system. It is used to supply power to the test system and the solenoid valve product under test, set the automated test program, set the pressure of the valve in the process system, collect and analyze the pressure data fed back by the process system, obtain the dynamic response current action curve of the solenoid valve product under test, and automatically interpret key data, including steady-state current Iy, pull-in trigger current Icd, pull-in trigger time Tcd, pull-in motion time Tyd, pull-in time Txh, release trigger current Icd", release trigger time Tcd", release motion time Tyd", and release time Tsf.

[0072] The integrated measurement and control system,

[0073] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0074] Example 1

[0075] like Figure 1 The comprehensive performance testing system in this embodiment includes a test bench, a process system, and a comprehensive measurement and control system.

[0076] like Figure 2As shown, the test bench includes a bench structure 1, which adopts a piano-style structure. The entire structure is made of sheet metal with powder coating and has an internal structural frame to ensure overall strength. Operating doors 16 are set at the front and rear for easy maintenance. Rollers 17 are installed at the bottom for easy movement. The upper part of the bench structure 1 houses the integrated measurement and control system, and the lower part houses the process system, isolating the electrical control part from the pneumatic part. The left side of the bench structure 1 is provided with a gas supply interface, and the right side is provided with an electrical performance test connection port 12, a first high-pressure working gas circuit interface, a second high-pressure working gas circuit interface, and a low-pressure working gas circuit interface. The solenoid valve product under test is electrically connected to the integrated measurement and control system through the electrical performance test connection port 12, and is pneumatically connected to the process system through the first high-pressure working gas circuit interface, the second high-pressure working gas circuit interface, and the low-pressure working gas circuit interface. The bench structure 1 is also provided with an emergency stop button 3, a 220V power indicator light 4, a 24V power indicator light 5, and a product power indicator 6.

[0077] The process system includes a drive gas path and a working gas path;

[0078] like Figure 3 As shown, the drive air circuit includes a shut-off valve A7, a filter A18, a 30MPa pressure transmitter 19, a manual pressure reducing valve 20, a 1.6MPa pressure gauge 21, a filter pressure regulator 22, a 1.1MPa safety valve 23, a 1MPa pressure transmitter 24, an air collection pipe 25, and eight two-position three-way solenoid valves 26 connected in sequence.

[0079] The shut-off valve A7 serves as the gas supply switch for the process system; the filter A18 filters the source gas; the 30MPa pressure transmitter 19 monitors the driving gas pressure; the 1.6MPa pressure gauge 21 observes the pressure after pressure reduction by the manual pressure reducing valve 20, preventing damage to the filter regulator 22; the filter regulator 22 filters the driving gas and further regulates the driving gas pressure; the 1.1MPa safety valve 23 prevents overpressure of the driving gas; the gas collection pipe 25 ensures the gas supply capacity of the driving gas path; the eight two-position three-way solenoid valves 26 are respectively used to control the electronic pressure reducing valve A27, electronic pressure reducing valve B32, pneumatic switch valve A29, pneumatic switch valve B34, pneumatic switch valve C43, pneumatic switch valve D46, pneumatic switch valve E48, and pneumatic switch valve F50 in the working gas path.

[0080] like Figure 3 As shown, the working air path is used to boost, depressurize and exhaust the solenoid valve product under test, including a first high-pressure working air path 13, a second high-pressure working air path 14, a low-pressure working air path 15 and an exhaust air path 52.

[0081] The first high-pressure working air circuit 13 branches off after the shut-off valve A7 and the filter A18 and connects in sequence to the shut-off valve B8, the electronic pressure reducing valve A27, the 20MPa pressure transmitter 28, the pneumatic switch valve A29, the 20MPa pressure transmitter and pressure gauge 30, and the filter B31.

[0082] The second high-pressure working air circuit 14 branches off after the shut-off valve A7 and the filter A18 and connects in sequence to the shut-off valve C9, the electronic pressure reducing valve B32, the 15MPa pressure transmitter 33, the pneumatic switch valve B34, the 15MPa pressure transmitter and pressure gauge 35, and the filter C36.

[0083] The low-pressure working air circuit 15 branches off after the shut-off valve A7 and filter A18, and connects in sequence to the shut-off valve D10, manual pressure reducing valve 37, 1.6MPa pressure gauge 38, 1.1MPa safety valve 39, electric proportional valve 40, pressure stabilizing tank 41, 1MPa pressure transmitter 42, pneumatic switch valve C43, 1MPa pressure transmitter and pressure gauge 44, and filter D45;

[0084] The exhaust gas path branches off after the shut-off valve A7 and filter A18 and connects to the shut-off valve E11.

[0085] A branch line is branched between the pneumatic switch valve A29 in the first high-pressure working air circuit 13 and the 20MPa pressure transmitter and pressure gauge 30, connecting to the pneumatic switch valve D46, and connected in parallel with the pneumatic switch valve D46 to the shut-off valve F47, and finally connected to the rear end of the shut-off valve E11 in the exhaust air circuit.

[0086] A branch line is formed between the pneumatic switch valve B34 in the second high-pressure working air circuit 14 and the 15MPa pressure transmitter and pressure gauge 35, connecting to the pneumatic switch valve E48. The branch line is connected in parallel with the pneumatic switch valve E48 to the shut-off valve G49, and finally connected to the rear end of the shut-off valve E11 in the exhaust air circuit.

[0087] In the low-pressure working air circuit 15, the pneumatic switch valve C43 branches off from the 1MPa pressure transmitter and pressure gauge 44 and connects to the pneumatic switch valve F50. The pneumatic switch valve F50 is connected in parallel with the shut-off valve H51, and finally connected to the rear end of the shut-off valve E11 in the exhaust air circuit.

[0088] The solenoid valve under test is connected to the first high-pressure working air circuit interface, the second high-pressure working air circuit interface, and the low-pressure working air circuit interface on the platform structure 1 through a hose and auxiliary tooling, so as to achieve air circuit connection with the first high-pressure working air circuit 13, the second high-pressure working air circuit 14, and the low-pressure working air circuit 15.

[0089] In the first high-pressure working gas circuit 13 and the second high-pressure working gas circuit 14, shut-off valves B8 and C9 are used for working circuit selection; electronic pressure reducing valves A27 and B32 are used for pressure boosting and depressurization operations; 20MPa pressure transmitters 28 and 15MPa pressure transmitters 33 are used for pressure monitoring and feedback after pressure reduction; pneumatic switching valves A29 and B34 are used for working circuit pressure holding and venting; 20MPa pressure transmitters and pressure gauges 30 and 15MPa pressure transmitters and pressure gauges 35 are used for working circuit pressure monitoring and feedback; filters B31 and C36 are used for working circuit gas filtration.

[0090] In the low-pressure working air circuit 15, the shut-off valve D10 is used for working circuit selection; the manual pressure reducing valve 37 is compensated for pressure reduction control through the electro-proportional valve 40, realizing the proportional valve's self-closed-loop control to ensure the pressure control and accuracy of the low-pressure working air circuit; the 1.6MPa pressure gauge 38 is used to observe the pressure after pressure reduction by the manual pressure reducing valve 37; the 1.1MPa safety valve 39 is used to prevent overpressure in the low-pressure circuit; the pressure stabilizing tank 41 is used to buffer pressure fluctuations in the low-pressure circuit; the pneumatic switch valve C43 is used for pressure maintenance and venting in the working circuit; the 1MPa pressure transmitter and pressure gauge 44 are used for monitoring and feedback of the working circuit pressure; and the filter D45 is used for filtering the working circuit gas.

[0091] In the exhaust gas path 52, the shut-off valve E11 is used to release the gas pressure of the process system; the pneumatic switch valve D46 and the shut-off valve F47 are used to automatically or manually control the pressure release of the first high-pressure working gas path 13; the pneumatic switch valve E48 and the shut-off valve G49 are used to automatically or manually control the pressure release of the second high-pressure working gas path 14; and the pneumatic switch valve F50 and the shut-off valve H51 are used to automatically or manually control the pressure release of the low-pressure working gas path 15.

[0092] like Figure 4 As shown, the integrated measurement and control system includes a data acquisition unit 53, a PC and peripherals 2, a PLC 54, a switching power supply 55, a PWM module 56, a first solid-state relay 57, a linear power supply 58, a valve control box 59, a second solid-state relay 60, and supporting equipment.

[0093] The data acquisition unit 53 is used for acquiring pressure data from the 30MPa pressure transmitter 19, 1MPa pressure transmitter 24, 20MPa pressure transmitter 28, 20MPa pressure transmitter and pressure gauge 30, 15MPa pressure transmitter 33, 15MPa pressure transmitter and pressure gauge 35, 1MPa pressure transmitter 42, and 1MPa pressure transmitter and pressure gauge 44, and for recording and embedded monitoring of the dynamic response current data of the solenoid valve under test.

[0094] In this embodiment, the specific information of the dynamic response current collected by the data acquisition unit 53 is as follows: Figure 5As shown, the PC and peripheral device 2 can automatically interpret the steady-state current Iy, pull-in trigger current Icd, pull-in trigger time Tcd, pull-in motion time Tyd, pull-in time Txh, release trigger current Icd”, release trigger time Tcd”, release motion time Tyd”, and release time Tsf in the dynamic response current action curve.

[0095] The PLC54 includes a CPU, a communication module, an AO module, and a DO module. The communication module is used for data communication between the PLC54 and electronic pressure reducing valves A27 and B32, and a linear power supply 58. The AO module is used to control the electro-proportional valve 40. The DO module uses the first solid-state relay 57 and eight two-position three-way solenoid valves 26 to set the pressure of electronic pressure reducing valves A27 and B32 in the test system, as well as the switching actions of pneumatic switching valves A29, B34, C43, D46, E48, and F50. The DO module also controls the PWM module 56 to achieve millisecond-level power on / off of the solenoid valve under test, meeting the automated testing requirements of valve core life test.

[0096] The switching power supply 55 is used to power the data acquisition unit 53, PC and peripherals 2, PLC 54, and the switching power supply 55; the linear power supply 58 is used to regulate the voltage and enable the solenoid valve product under test.

[0097] like Figure 6 As shown, the valve control box 59 includes a high-precision sampling resistor 61 and a freewheeling diode 62; the high-precision sampling resistor 61 is connected in series with the coil circuit of the solenoid valve product under test, and transmits the dynamic response current information of the solenoid valve product under test back to the data acquisition unit 53; the freewheeling diode 62 is connected in parallel with the coil circuit of the solenoid valve product under test for circuit protection.

[0098] The second solid-state relay 60 is used to enable multi-channel access of the solenoid valve product under test, so that the test system has multi-channel testing capability;

[0099] The supporting equipment includes switches, electrical connectors, quick-connect terminals, cables, etc.

[0100] The pneumatic solenoid valve comprehensive performance testing system proposed in this invention can realize the coordinated operation of the process system and the comprehensive measurement and control system through the control valve on the test bench 1, the PC, and peripherals 2. Taking the pneumatic four-machine solenoid valve as an example, the specific control logic is as follows, depending on the different test items:

[0101] Performance test of pneumatic four-machine solenoid valve:

[0102] 1. After confirming that the air supply source and equipment power supply are properly connected to the pneumatic solenoid valve comprehensive performance test system, determine whether it is necessary to connect the first high-pressure working air circuit 13 and the second high-pressure working air circuit 14 according to the process requirements of the solenoid valve product under test. Confirm that the lead wires of the four quadrants of the solenoid valve product under test are connected to the electrical performance test connection port 12 in sequence.

[0103] Under no-load conditions, the solenoid valve under test does not need to be connected to the various air lines of the process system. Under load conditions, the solenoid valve under test needs to be connected to the first high-pressure working air line 13, and the second high-pressure working air line 14 and the low-pressure working air line 15 can be selected to be connected according to different working conditions.

[0104] 2. Open shut-off valve A7 to introduce high-pressure gas into the test system, and then use shut-off valves B8 and C9 to select the circuit according to the test requirements.

[0105] 3. The inflation rate, holding time, deflation rate, number of switching operations, time interval, and whether to perform electrical performance tests can be set via PC and peripherals.

[0106] 4. The PC communicates with the data acquisition unit 53 and PLC 54. The PLC 54 controls the drive air circuit and then controls the electronic pressure reducing valve and pneumatic switching valve. Based on whether the dynamic response current action curve needs to be output, it determines whether the coil circuit of the solenoid valve product under test needs to pass through the valve control box 59. The host computer controls the linear power supply 58 to adjust the voltage and enable it.

[0107] 5. The test program is executed automatically, and the data transmitted back by the pressure transmitter is used for automatic closed-loop regulation to complete the automatic interpretation of the dynamic response data of the solenoid valve.

[0108] 6. After the test is completed, perform the exhaust operation.

[0109] Performance testing of non-pneumatic solenoid valves (testing of opening and closing pressure data for valves such as check valves):

[0110] 1. After confirming that the air supply source and equipment power supply are properly connected to the pneumatic solenoid valve comprehensive performance testing system, according to the process requirements of the solenoid valve product under test, if the solenoid valve product under test is to be tested for opening / closing or the air distribution pressure is less than 0.1MPa, the solenoid valve product under test needs to be connected to the low-pressure working air circuit.

[0111] 2. Open the shut-off valve A7 to introduce high-pressure gas into the test system, and then use the shut-off valve D10 to select the circuit according to the test requirements.

[0112] 3. The inflation rate, holding time, deflation rate and other parameters can be set via PC and peripheral device 2.

[0113] 4. The PC communicates with the data acquisition unit 53 and PLC 54. The PLC 54 controls the drive air circuit, thereby controlling the electronic pressure reducing valve and the pneumatic switching valve.

[0114] 5. Extend the outlet hose of the solenoid valve under test into a container filled with anhydrous ethanol or other liquid media to facilitate observation of the generation or disappearance of bubbles.

[0115] 6. Operators should observe whether air bubbles are generated or disappear in the container. If such situations occur, record the opening / closing pressure data of the solenoid valve being tested.

[0116] 7. After the test is completed, perform the exhaust operation.

[0117] In summary, the pneumatic solenoid valve comprehensive performance testing system of the present invention can simultaneously perform inspection tests on multiple pneumatic solenoid valves / four-machine solenoid valves. The valve under test only needs to be clamped with the system of the present invention once to complete dynamic response performance (dynamic response curve of electromagnetic coil, steady-state current, pull-in / release current, pull-in / release contact time, pull-in / release movement time, pull-in / release time), life test, coil temperature rise test, etc.

[0118] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0119] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A comprehensive performance testing system for pneumatic solenoid valves, characterized in that, Includes the test bench, process system, and integrated measurement and control system; The test bench is used for human-machine interaction, provides a connection port for testing the electrical performance of the solenoid valve under test, and also provides an installation carrier for the process system and the integrated measurement and control system. The process system is the gas path part of the test system, which is equipped with a drive gas path and multiple working gas paths. The drive gas path is connected to an external gas supply source, which acts as the gas supply switch of the process system and regulates the drive gas pressure of the valves in the multiple working gas paths. The multiple working gas paths are used to perform pressure boosting, pressure reduction, pressure holding and exhaust operations on the solenoid valve under test, so as to meet the various test conditions of the solenoid valve under test under load conditions, monitor the pressure data of the working gas paths and feed them back to the integrated measurement and control system. The integrated measurement and control system is the electrical control part of the test system. It is used to supply power to the test system and the solenoid valve product under test, set the automated test program, set the pressure of the valve in the process system, collect and analyze the pressure data fed back by the process system, obtain the dynamic response current action curve of the solenoid valve product under test, and automatically interpret key data, including steady-state current Iy, pull-in trigger current Icd, pull-in trigger time Tcd, pull-in motion time Tyd, pull-in time Txh, release trigger current Icd", release trigger time Tcd", release motion time Tyd", and release time Tsf.

2. The pneumatic solenoid valve comprehensive performance testing system according to claim 1, characterized in that, The process system includes a drive gas path and a working gas path; The drive air circuit includes a shut-off valve A (7), a filter A (18), a 30MPa pressure transmitter (19), a manual pressure reducing valve (20), a 1.6MPa pressure gauge (21), a filter pressure regulator (22), a 1.1MPa safety valve (23), a 1MPa pressure transmitter (24), an air collection pipe (25), and eight two-position three-way solenoid valves (26) connected in sequence. The shut-off valve A (7) serves as the gas supply switch for the process system; the filter A (18) filters the gas source; the 30MPa pressure transmitter (19) monitors the driving gas pressure; the 1.6MPa pressure gauge (21) observes the pressure after the manual pressure reducing valve (20) reduces pressure, thus avoiding damage to the filter regulator (22); the filter regulator (22) filters the driving gas and further regulates the driving gas pressure; the 1.1MPa safety valve (23) prevents the driving gas pressure from overpressure; the gas collection pipe (25) ensures the gas supply capacity of the driving gas path; the eight two-position three-way solenoid valves (26) are respectively used to control the electronic pressure reducing valve A (27), electronic pressure reducing valve B (32), pneumatic switch valve A (29), pneumatic switch valve B (34), pneumatic switch valve C (43), pneumatic switch valve D (46), pneumatic switch valve E (48), and pneumatic switch valve F (50) in the working gas path; The working gas path includes a first high-pressure working gas path (13), a second high-pressure working gas path (14), and a low-pressure working gas path (15); The first high-pressure working air circuit (13) branches off after the shut-off valve A (7) and filter A (18) and connects in sequence to the shut-off valve B (8), electronic pressure reducing valve A (27), 20MPa pressure transmitter (28), pneumatic switch valve A (29), 20MPa pressure transmitter and pressure gauge (30), and filter B (31). The second high-pressure working air circuit (14) branches off after the shut-off valve A (7) and filter A (18) and connects in sequence to the shut-off valve C (9), electronic pressure reducing valve B (32), 15MPa pressure transmitter (33), pneumatic switch valve B (34), 15MPa pressure transmitter and pressure gauge (35), and filter C (36). The low-pressure working air circuit (15) branches off after the shut-off valve A (7) and filter A (18) and connects in sequence to the shut-off valve D (10), manual pressure reducing valve (37), 1.6MPa pressure gauge (38), 1.1MPa safety valve (39), electric proportional valve (40), pressure stabilizing tank (41), 1MPa pressure transmitter (42), pneumatic switch valve C (43), 1MPa pressure transmitter and pressure gauge (44), and filter D (45); In the first high-pressure working air circuit (13) and the second high-pressure working air circuit (14), shut-off valve B (8) and shut-off valve C (9) are used for working circuit selection; electronic pressure reducing valve A (27) and electronic pressure reducing valve B (32) are used for pressure boosting and depressurization operations; 20MPa pressure transmitter (28) and 15MPa pressure transmitter (33) are used for pressure monitoring and feedback after pressure reduction; pneumatic switch valve A (29) and pneumatic switch valve B (34) are used for working circuit pressure holding and exhaust; 20MPa pressure transmitter and pressure gauge (30) and 15MPa pressure transmitter and pressure gauge (35) are used for working circuit pressure monitoring and feedback; filter B (31) and filter C (36) are used for working circuit gas filtration. In the low-pressure working air circuit (15), the shut-off valve D (10) is used for working circuit selection; the manual pressure reducing valve (37) is compensated for pressure reduction control through the electric proportional valve (40), realizing the proportional valve self-closed-loop control, ensuring the pressure control and accuracy of the low-pressure working air circuit; the 1.6MPa pressure gauge (38) is used to observe the pressure after pressure reduction by the manual pressure reducing valve (37); the 1.1MPa safety valve (39) is used to prevent overpressure in the low-pressure circuit; the pressure stabilizing tank (41) is used to buffer the pressure fluctuation in the low-pressure circuit; the pneumatic switch valve C (43) is used for pressure holding and venting in the working circuit; the 1MPa pressure transmitter and pressure gauge (44) are used for monitoring and feedback of the working circuit pressure; and the filter D (45) is used for gas filtration in the working circuit.

3. The pneumatic solenoid valve comprehensive performance testing system according to claim 2, characterized in that, The process system also includes an exhaust gas path; The exhaust gas path branches off after the shut-off valve A (7) and filter A (18) and connects to the shut-off valve E (11) to release the gas pressure of the process system; In the first high-pressure working air circuit (13), the pneumatic switch valve A (29) is connected to the 20MPa pressure transmitter and pressure gauge (30) via a branch line to the pneumatic switch valve D (46), and is connected in parallel with the pneumatic switch valve D (46) to the shut-off valve F (47), and finally connected to the back end of the shut-off valve E (11) in the exhaust air circuit. In the second high-pressure working air circuit (14), the pneumatic switch valve B (34) is connected to the pneumatic switch valve E (48) between the 15MPa pressure transmitter and pressure gauge (35), and is connected in parallel with the pneumatic switch valve E (48) to the shut-off valve G (49), and finally connected to the back end of the shut-off valve E (11) in the exhaust air circuit. A branch line is formed between the pneumatic switch valve C (43) in the low-pressure working air circuit (15) and the 1MPa pressure transmitter and pressure gauge (44) to connect to the pneumatic switch valve F (50), and in parallel with the pneumatic switch valve F (50) to connect to the shut-off valve H (51), and finally connected to the back end of the shut-off valve E (11) in the exhaust air circuit.

4. The pneumatic solenoid valve comprehensive performance testing system according to claim 2, characterized in that, The upper half of the test bench is equipped with an integrated measurement and control system, while the lower half is equipped with a process system, thus isolating the electrical control part from the pneumatic part. The test bench is equipped with an air supply interface on one side and an electrical performance test connection port (12), a first high-pressure working air circuit interface, a second high-pressure working air circuit interface, and a low-pressure working air circuit interface on the other side. The solenoid valve product under test is electrically connected to the integrated measurement and control system through the electrical performance test connection port (12) and is connected to the process system through the first high-pressure working air circuit interface, the second high-pressure working air circuit interface, and the low-pressure working air circuit interface.

5. The pneumatic solenoid valve comprehensive performance testing system according to claim 3, characterized in that, The integrated measurement and control system includes a data acquisition unit (53), a PC and peripherals (2), a PLC (54), a switching power supply (55), a first solid-state relay (57), a linear power supply (58), a valve control box (59), and a second solid-state relay (60); The data acquisition unit (53) is used to acquire pressure data of 30MPa pressure transmitter (19), 1MPa pressure transmitter (24), 20MPa pressure transmitter (28), 20MPa pressure transmitter and pressure gauge (30), 15MPa pressure transmitter (33), 15MPa pressure transmitter and pressure gauge (35), 1MPa pressure transmitter (42), and 1MPa pressure transmitter and pressure gauge (44) and to record and monitor the dynamic response current data of the solenoid valve product under test. The PC and peripherals (2) are used for human-computer interaction, PLC control and data acquisition (53) data analysis and processing, and automatically interpret key data of dynamic response current action curve; The PLC (54) uses the first solid-state relay (57) and eight two-position three-way solenoid valves (26) to set the pressure of the electronic pressure reducing valve and the electric proportional valve, and to open or close the pneumatic switching valve and the solenoid valve under test. The switching power supply (55) is used to power the data acquisition unit (53), PC and peripherals (2), and PLC (54); The linear power supply (58) is used to regulate the voltage and enable the solenoid valve product under test; The valve control box (59) is connected to the solenoid valve product under test and transmits the dynamic response current information of the solenoid valve product under test back to the data acquisition unit (53). The second solid-state relay (60) is used to enable multi-channel access of the solenoid valve product under test, so that the test system has multi-channel testing capability.

6. The pneumatic solenoid valve comprehensive performance testing system according to claim 5, characterized in that, The PLC (54) includes a CPU, a communication module, an AO module, and a DO module; The communication module is used for data communication between the PLC (54) and the electronic pressure reducing valve A (27), the electronic pressure reducing valve B (32), and the linear power supply (58); the AO module is used to control the electro-proportional valve (40); the DO module realizes the pressure setting of the electronic pressure reducing valve A (27) and the electronic pressure reducing valve B (32) in the test system, as well as the switching action of the pneumatic switching valves A (29), B (34), C (43), D (46), E (48), and F (50) through the first solid-state relay (57) and eight two-position three-way solenoid valves (26).

7. The pneumatic solenoid valve comprehensive performance testing system according to claim 6, characterized in that, The integrated measurement and control system also includes a PWM module (56). The DO module controls the PWM module (56) to realize the power on and off of the solenoid valve product under test in milliseconds, so as to meet the automated testing requirements of valve core life test.

8. The pneumatic solenoid valve comprehensive performance testing system according to claim 5, characterized in that, The valve control box (59) includes a high-precision sampling resistor (61) and a freewheeling diode (62); The high-precision sampling resistor (61) is connected in series in the coil circuit of the solenoid valve product under test, and transmits the dynamic response current information of the solenoid valve product under test back to the data acquisition unit (53); the freewheeling diode (62) is connected in parallel in the coil circuit of the solenoid valve product under test, and is used for circuit protection.

9. The pneumatic solenoid valve comprehensive performance testing system according to claim 5, characterized in that, The testing process for the pneumatic four-machine solenoid valve product performance testing using the aforementioned testing system is as follows: After confirming that the gas supply source and equipment power supply are properly connected to the test system, determine whether the first high-pressure working gas path (13) and the second high-pressure working gas path (14) need to be connected according to the process requirements of the solenoid valve product under test. Confirm that the lead wires of the four quadrants of the solenoid valve product under test are connected to the electrical performance test connection port (12) in sequence. Under no-load conditions, the solenoid valve product under test does not need to be connected to the various gas paths of the process system. Under load conditions, the solenoid valve product under test is connected to the first high-pressure working gas path (13), and the second high-pressure working gas path (14) and the low-pressure working gas path (15) are selected to be connected according to different working conditions. Open shut-off valve A (7) to introduce high-pressure gas into the test system, and use shut-off valve B (8) and shut-off valve C (9) to select the circuit according to the test requirements; The inflation rate, holding time, deflation rate, number of switching operations, time interval, and whether to perform electrical performance testing can be set via PC and peripherals (2); The PC communicates with the data acquisition unit (53) and PLC (54). The PLC (54) controls the drive air circuit and then controls the electronic pressure reducing valve and the pneumatic switch valve. Based on whether the dynamic response current action curve needs to be output, it is determined whether the coil circuit of the solenoid valve product under test needs to be controlled through the valve control box (59). The host computer controls the linear power supply (58), adjusts the voltage and enables it. The test program is executed automatically, and the data transmitted back by the pressure transmitter is used for automatic closed-loop regulation to complete the automatic interpretation of the dynamic response data of the solenoid valve. After the test, the exhaust operation was carried out.

10. The comprehensive performance testing system for a pneumatic solenoid valve according to claim 5, characterized in that, The procedure for testing the opening and closing pressures of non-pneumatic solenoid valves using the aforementioned testing system is as follows: After confirming that the gas supply source and equipment power supply are properly connected to the test system, according to the process requirements of the solenoid valve product under test, if the solenoid valve product under test is to be tested for opening / closing or the gas distribution pressure is less than 0.1MPa, the solenoid valve product under test needs to be connected to the low-pressure working gas circuit. Open the shut-off valve A (7) to introduce high-pressure gas into the test system, and use the shut-off valve D (10) to select the circuit according to the test requirements; The inflation rate, holding time, and deflation rate can be set via PC and peripherals (2); The PC communicates with the data acquisition unit (53) and PLC (54), and controls the drive air circuit through the PLC (54) to control the electronic pressure reducing valve and the pneumatic switching valve. Extend the outlet hose of the solenoid valve product under test into a container filled with anhydrous ethanol. When bubbles are observed to be generated or disappear in the container, the opening / closing pressure data of the solenoid valve under test is recorded.

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