A solenoid valve operating durability testing system

Abstract

This application relates to a solenoid valve actuation durability testing system, belonging to the technical field of solenoid valve testing. The system includes: pressure sensors installed at the front and rear ends of the solenoid valve under test for measuring the pressure at both ends; a drive unit connected to the manual operating handle of the solenoid valve for opening the valve; an alarm for receiving alarm control signals and emitting audible and visual warning signals; and an electrical control box electrically connected to the solenoid valve under test, two pressure sensors, the drive unit, and the alarm, for controlling the closing of the solenoid valve, controlling the operation of the drive unit, receiving pressure data, and acquiring valve feedback signals from the solenoid valve. The control box also outputs an alarm control signal when the solenoid valve fails to close or open correctly. Because the solenoid valve actuation durability testing is fully automated and requires no manual intervention, it improves testing efficiency, shortens the test cycle, and reduces labor costs.

Description

Technical Field

[0001] This application relates to the technical field of solenoid valve testing, and in particular to a solenoid valve operation durability testing system. Background Technology

[0002] Solenoid valves, also known as electromagnetic emergency shut-off valves, work by using an energized electromagnetic coil to generate magnetic force that drives the valve core to move, thus controlling the valve's opening or closing. Relevant product standards require testing the operational durability of solenoid valves to verify product quality.

[0003] The solenoid valve's operational durability test refers to the test of continuously performing opening and closing actions at certain time intervals under specific load conditions. Relevant standards for solenoid valves stipulate that the valve can be automatically closed by a control signal, but manual reset is still required. However, the number of test actions varies depending on the valve specification, ranging from hundreds to thousands of times. Therefore, durability testing requires significant manpower and involves various measurements and monitoring, resulting in a long testing cycle and potential fatigue for testing personnel. Utility Model Content

[0004] To improve testing efficiency, shorten the test cycle, and reduce labor costs, this application provides a solenoid valve operating durability testing system, which adopts the following technical solution: A solenoid valve operating durability testing system includes: Pressure sensors are installed at the front and rear ends of the solenoid valve under test to measure the pressure at the front and rear ends of the solenoid valve under test. A driving component is connected to the manual operating handle of the solenoid valve under test and is used to drive the solenoid valve to open. An alarm is used to receive alarm control signals and emit audible and visual warning signals. The electrical control box is electrically connected to the solenoid valve under test, the two pressure sensors, the drive unit, and the alarm. It is used to control the solenoid valve under test to close, control the drive unit to operate, receive pressure data, and collect the valve feedback signal of the solenoid valve. The electrical control box is also used to output the alarm control signal when the solenoid valve under test fails to close or open correctly.

[0005] By adopting the above technical solution, the solenoid valve, due to its internal structural design, experiences pressure loss when a fixed flow of gas passes through it, meaning the pressure at the valve's front end differs from the pressure at its rear end. When the valve is closed, the rear end is open to air, and the pressure difference between the front and rear ends is the pressure of the test gas. Since the test gas pressure is known and much greater than the pressure difference when the valve is open, the pressure difference between the front and rear ends of the solenoid valve indicates whether the valve is open or closed, corresponding to the control signal. In other words, it can be determined whether the valve is closed after the control signal is issued. If the valve fails to close correctly, an alarm is triggered, and the test system automatically stops, awaiting manual confirmation. If the valve closes correctly, the control actuator opens the solenoid valve. Because the solenoid valve's durability test is fully automated, requiring virtually no manual intervention, testing efficiency is improved, the test cycle is shortened, and labor costs are reduced.

[0006] Optionally, the solenoid valve actuation durability testing system further includes: The control computer has built-in control software and is connected to the electrical control box. It is used to manage the test process in a timed manner, record image information, collect the action information of the electrical control box and record test data, generate test reports based on the recorded information, and output control commands to the electrical control box. A camera is installed at the solenoid valve under test and is connected to the control computer for collecting image information at the solenoid valve under test.

[0007] By adopting the above technical solution, the basic information of the valve under test can be registered through the testing software, such as manufacturer information, model, serial number, valve diameter, working voltage, normally open / normally closed type, etc. Then, the number of tests, test interval, start time, end time, and other information can be set. The photos taken by the camera showing the valve's open and closed state are recorded and archived so that a test report can be automatically generated after the test to ensure the fairness of the experiment.

[0008] Optionally, the solenoid valve actuation durability testing system further includes: An infrared thermometer is installed at the solenoid valve under test and is communicatively connected to the electrical control box to detect the radiation temperature of the actuator of the solenoid valve under test.

[0009] By adopting the above technical solution, since the temperature of the actuator may become abnormal after the solenoid valve has been operated repeatedly, an infrared thermometer is used to monitor the radiation temperature of the solenoid valve actuator.

[0010] Optionally, the solenoid valve actuation durability testing system further includes: A compressor is used to produce gas at a specified pressure. The pressure-stabilizing gas storage tank is connected at one end to the compressor and at the other end to the solenoid valve under test, and is used to stabilize the airflow pressure.

[0011] By adopting the above technical solution, the airflow pressure fluctuation is prevented when the valve is in the open and closed state during the test.

[0012] Optionally, the solenoid valve actuation durability testing system further includes: A regulating valve, installed at the output end of the pressure-stabilized gas storage tank, is used to regulate the output gas flow rate; A flow meter is installed at the output end of the pressure-stabilized gas storage tank and is electrically connected to the electrical control box. It is used to measure the flow rate of the gas output from the pressure-stabilized gas storage tank.

[0013] By adopting the above technical solution, the testing conditions for solenoid valves of different specifications can be met.

[0014] Optionally, the electrical control box includes: The main control board, powered by a microprocessor, is used to acquire signals from the two pressure sensors, the flow meter, the valve feedback signal, the temperature signal, and output alarm control signals and valve opening control signals. The power supply module is used to output DC24V / 5A, DC12V / 1A, and DC5V / 1A; DC24V is used to control the low-pressure DC solenoid valve and to power the pressure sensor, flow meter, and alarm; DC12V is used to control the low-pressure pulse solenoid valve; and DC5V is used to power the microprocessor.

[0015] In summary, this application has at least the following beneficial effects: 1. The test process is automatically controlled and test records are automatically generated, eliminating the need for manual intervention and improving test efficiency; 2. If any abnormality occurs during the test, an alarm should be issued immediately and the test should be stopped. The test should only be resumed after manual intervention to ensure test safety. 3. It can display information such as the start time of the experiment, the expected end time of the experiment, the number of tests already conducted, and the number of tests remaining, making it easy to understand the progress of the experiment.

[0016] 4. Automatically record the radiant temperature of the valve and automatically capture images of abnormal valve operation to help prove the impartiality of the test. Attached Figure Description

[0017] Figure 1 This is a system structure diagram of an embodiment of this application; Figure 2 This is a schematic diagram of the electrical structure of the electrical control box.

[0018] Explanation of reference numerals in the attached diagram: 1. Compressor; 2. Pressure-stabilizing gas storage tank; 3. Regulating valve; 4. Flow meter; 5. Pressure sensor; 6. Drive unit; 7. Alarm; 8. Electrical control box; 81. Main control board; 82. Power module; 9. Control computer; 10. Camera; 11. Infrared thermometer; 12. Solenoid valve under test. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the appendices of the embodiments of this utility model will be described below. Figure 1 -Appendix Figure 2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] This application discloses a solenoid valve operation durability testing system. (Refer to...) Figure 1 The solenoid valve operation durability testing system includes a compressor 1, a pressure-stabilizing gas storage tank 2, a regulating valve 3, a flow meter 4, a pressure sensor 5, a drive component 6, an alarm 7, an electrical control box 8, a control computer 9, and a camera 10. Figure 1 The red lines in the diagram represent electrical connection lines.

[0021] The compressor 1 is used to generate gas at a specified pressure. One end of the pressure-stabilizing gas storage tank 2 is connected to the compressor 1, and the other end is connected to the solenoid valve 12 under test, which is used to stabilize the gas flow pressure. The regulating valve 3 and the flow meter 4 are installed sequentially at the output end of the pressure-stabilizing gas storage tank 2. The flow meter 4 is located on the side of the regulating valve 3 away from the pressure-stabilizing gas storage tank 2. The regulating valve 3 is used to regulate the output gas flow rate, and the flow meter 4 is used to measure the output gas flow rate of the pressure-stabilizing gas storage tank 2.

[0022] Pressure sensors 5 are installed at the front and rear ends of the solenoid valve 12 under test to measure the pressure at both ends. A drive unit 6 is connected to the manual operating handle of the solenoid valve 12 under test to drive its opening. The drive unit 6 can be an electric cylinder; the push rod of the electric cylinder is connected to the manual operating handle of the solenoid valve 12 under test. By adjusting the push rod of the electric cylinder to generate a suitable linear displacement distance, the mechanical opening of the valve is achieved.

[0023] Furthermore, since the structures of solenoid valves differ, the structure of the drive component 6 can also differ, as long as it is a conventional structure that enables the mechanical opening of the solenoid valve 12 under test. The alarm 7 can be an audible and visual alarm, used to receive alarm control signals and provide audible and visual warnings to alert the test personnel to any abnormalities.

[0024] The electrical control box 8 is electrically connected to the solenoid valve 12 under test, two pressure sensors 5, a drive unit 6, an alarm 7, and a flow meter 4. It is used to control the solenoid valve 12 under test to close, control the drive unit 6 to operate, receive pressure data, collect the valve feedback signal of the solenoid valve 12 under test, and receive flow data. The electrical control box 8 is also used to output an alarm control signal when the solenoid valve 12 under test fails to close or open correctly.

[0025] Camera 10 is installed at the solenoid valve 12 under test to collect image information from the solenoid valve 12. Control computer 9 has built-in control software that communicates with control box 8 and camera 10. It is used for timed management of the test process, recording image information, collecting action information of control box 8 and recording test data, generating test reports based on the recorded information, and outputting control commands to control box 8.

[0026] In addition, an infrared thermometer 11 is installed at the solenoid valve 12 under test. The infrared thermometer 11 is connected to the electrical control box 8 to detect the radiation temperature of the actuator of the solenoid valve 12 under test.

[0027] Reference Figure 2 The electrical control box 8 includes a main control board 81 and a power module 82.

[0028] The main control board 81, powered by a microprocessor, is used to acquire signals from two pressure sensors 5, the flow meter 4, valve feedback signals, and temperature signals. It also outputs alarm control signals and valve opening control signals. Furthermore, the main control board 81 is equipped with a manual test button. After the pneumatic and electrical circuits are installed, the valve opening / closing button can be operated to test the control effect of the mechanical valve opening mechanism during testing.

[0029] Power module 82 is used to output DC24V / 5A, DC12V / 1A, and DC5V / 1A; DC24V is used to control the low-pressure DC solenoid valve and to power the pressure sensor 5, flow meter 4, and alarm; DC12V is used to control the low-pressure pulse solenoid valve; and DC5V is used to power the microprocessor.

[0030] Some solenoid valves communicate with the control box 8 wirelessly, lacking a direct circuit control interface, thus requiring the expansion of the wireless communication interface. The wireless communication circuit interface may differ between manufacturers. The main control board 81 can reserve a serial port and an I / O control port for connecting the solenoid valve's wireless communication module, thereby enabling wireless command control of the tested solenoid valve 12.

[0031] Pressure sensor 5 and flow meter 4 are standard instruments and equipment, and their output is a standard 4mA to 20mA signal. By adding a sampling resistor to the main control board 81, relevant information can be directly collected.

[0032] The infrared thermometer 11 is an off-the-shelf instrument that communicates with the main control board 81 via serial port. The measured temperature value can be collected according to the communication protocol.

[0033] Application example: Connect the valve under test to the test gas circuit via a conversion connector. Adjust the required gas flow rate for the test using regulating valve 3. Record the pressure at the front and rear ends of the valve under test when it is in the open state, and calculate the pressure difference.

[0034] Connect the relevant circuits according to the valve's operating voltage and whether it is normally open or normally closed.

[0035] Remove the manual operation protective cover of the valve, use clamps to tighten the manual valve opening handle, connect the push rod of the electric cylinder, adjust the position and direction of the electric cylinder, manually operate the valve opening / closing button on the electric control box 8, and test the control effect of the electric cylinder in opening the valve.

[0036] Point the infrared thermometer 11 at the actuator of the valve being tested, and point the camera 10 at the actuator of the valve being tested.

[0037] Start the control computer 9, enter the dedicated testing software, set the required information as mentioned above, and confirm the start of the test. Under the control of the electrical control box 8, the valve under test will be closed and opened in a rhythmic manner to perform a durability test.

[0038] When the valve under test is closed / opened, the testing software records the pressure at both ends of the valve, the gas flow rate, the detected temperature, the status of the valve's feedback signal, and takes a picture of the actuator. No manual intervention is required during this process until the test is completed. If any abnormality occurs during the test, the test is paused and an audible and visual alarm is issued to remind manual confirmation and handling.

[0039] The testing software allows for scheduled testing and automatic termination outside of working hours, freeing up manual operation. It also displays information such as start time, expected end time, number of tests completed, and remaining tests, facilitating monitoring of test progress.

[0040] Based on the control signal output from the electrical control box 8 and the measured pressure changes across the valve under test, the valve's response time can be calculated. Based on the monitored temperature, a curve showing the relationship between temperature and the number of tests can be plotted.

[0041] It should be noted that this testing system can also be used to test valves that use liquid as the medium; simply replace compressor 1 and pressure-stabilizing gas storage tank 2 with a water pump and a water tank.

[0042] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A solenoid valve operating durability testing system, characterized in that, include: Pressure sensor (5) is installed at the front and rear ends of the solenoid valve (12) under test, and is used to measure the pressure at the front and rear ends of the solenoid valve (12) under test; The driving component (6) is connected to the manual operating handle of the solenoid valve (12) under test and is used to drive the solenoid valve (12) under test to open. An alarm (7) is used to receive alarm control signals and issue audible and visual warning signals; The electrical control box (8) is electrically connected to the solenoid valve under test (12), the two pressure sensors (5), the drive unit (6) and the alarm (7), and is used to control the solenoid valve under test (12) to close, control the drive unit (6) to operate, receive pressure data and collect the valve feedback signal of the solenoid valve under test (12); the electrical control box (8) is also used to output the alarm control signal when the solenoid valve under test (12) fails to close or open correctly.

2. The solenoid valve operation durability testing system according to claim 1, characterized in that, The solenoid valve operation durability testing system also includes: The control computer (9) has built-in control software and is connected to the electrical control box (8) for timed management of the test process, recording image information, collecting the action information of the electrical control box (8) and recording test data, generating test reports based on the recorded information and outputting control commands to the electrical control box (8); A camera (10) is installed at the solenoid valve (12) under test and is connected to the control computer (9) for collecting image information at the solenoid valve (12) under test.

3. The solenoid valve operation durability testing system according to claim 2, characterized in that, The solenoid valve operation durability testing system also includes: An infrared thermometer (11) is installed at the solenoid valve (12) under test and is connected in communication with the electrical control box (8) to detect the radiation temperature of the actuator of the solenoid valve (12) under test.

4. The solenoid valve operation durability testing system according to claim 3, characterized in that, The solenoid valve operation durability testing system also includes: Compressor (1), used to generate gas at a specified pressure; The pressure-stabilizing gas storage tank (2) is connected at one end to the compressor (1) and at the other end to the solenoid valve (12) under test, and is used to stabilize the airflow pressure.

5. The solenoid valve operation durability testing system according to claim 4, characterized in that, The solenoid valve operation durability testing system also includes: A regulating valve (3) is installed at the output end of the pressure-stabilized gas storage tank (2) to regulate the output gas flow rate; A flow meter (4) is installed at the output end of the pressure-stabilized gas storage tank (2) and is electrically connected to the electrical control box (8) to measure the flow rate of the gas output from the pressure-stabilized gas storage tank (2).

6. The electromagnetic valve operation durability testing system according to claim 5, characterized in that, The electrical control box (8) includes: The main control board (81), powered by a microprocessor, is used to acquire signals from the two pressure sensors (5), acquire signals from the flow meter (4), acquire valve feedback signals, acquire temperature signals, output alarm control signals, and output valve opening control signals. The power supply module (82) is used to output DC24V / 5A, DC12V / 1A, and DC5V / 1A; DC24V is used to control the low-pressure DC solenoid valve and to power the pressure sensor (5), flow meter (4), and alarm; DC12V is used to control the low-pressure pulse solenoid valve; and DC5V is used to power the microprocessor.

Images