Air pressure type three-way solenoid valve verification system

Abstract

The utility model belongs to the technical field of component verification, and particularly relates to an air pressure type three-way solenoid valve verification system, which comprises an air pressure pump with pressure display and an adjustable power supply device, and is characterized in that the air pressure pump with pressure display is respectively connected with an air inlet I of a solenoid valve to be verified and an air inlet II of the solenoid valve to be verified through pipelines; an air outlet of the to-be-detected electromagnetic valve is respectively connected with an air inlet of the pressure transmitter with the display screen and an air inlet of the air storage tank through pipelines; the change-over switch is used for checking the voltage operating values of coil operation and resetting on the two sides of the to-be-detected electromagnetic valve respectively, and the minimum air source pressure operating value of the to-be-detected electromagnetic valve can be measured, so that the defect that the coil operating voltage of the air pressure type electromagnetic valve and the minimum air source pressure of electromagnetic valve operation cannot be accurately measured in the prior art is overcome; meanwhile, whether the valve element acts in place or not can be judged by respectively closing the second mechanical valve and the third mechanical valve and displaying through a pressure transmitter with a display screen.

Description

Technical Field

[0001] This utility model belongs to the field of component verification technology, specifically relating to a pneumatic three-way solenoid valve verification system. Background Technology

[0002] In the field of industrial automation control, especially in pneumatic control systems, pneumatic three-way solenoid valves play a crucial role. They are responsible for controlling the flow and on / off of gas to achieve precise control of various equipment and processes. However, as the solenoid valve is used for a long time and is affected by the working environment, its performance may change. For example, the solenoid valve's operating voltage or minimum operating air pressure may deviate. This deviation may cause the solenoid valve core to fail to switch normally or to switch incompletely, which may lead to a series of problems, such as pipeline pressure loss, affecting the normal operation of the system, and pressure buildup, which may damage pipelines and related equipment, or even cause safety accidents.

[0003] Existing verification techniques have significant shortcomings. They cannot accurately test the action value of pneumatic solenoid valves under specific air pressure and voltage values. This makes it difficult to accurately determine whether the solenoid valve is in normal working condition in practical applications, and also makes it impossible to detect potential faults in a timely manner.

[0004] To address this issue, a pneumatic three-way solenoid valve calibration system was designed. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a pneumatic three-way solenoid valve calibration system, which effectively solves the problems described in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic three-way solenoid valve calibration system, comprising a pneumatic pump with pressure display and an adjustable power supply. The pneumatic pump with pressure display is connected to the air inlet one and the air inlet two of the solenoid valve under test via pipelines. The air outlet of the solenoid valve under test is connected to the air inlet of a pressure transmitter with display screen and the air inlet of an air storage tank via pipelines. The negative terminal of the adjustable power supply is connected to the inlet terminals of coil one and coil two via two wires. The outlet terminals of coil one and coil two are connected to the two outlet contacts of a switch via wires. The inlet contacts of the switch are connected to the positive terminal of the adjustable power supply via wires.

[0007] As a preferred embodiment of the pneumatic three-way solenoid valve calibration system of this utility model, a mechanical pressure gauge is provided on the pipeline between the pneumatic pump with pressure display and the solenoid valve to be tested.

[0008] In a preferred embodiment of the pneumatic three-way solenoid valve calibration system of this utility model, the solenoid valve to be tested is located between coil one and coil two, and coil two is located to the right of coil one.

[0009] As a preferred embodiment of the pneumatic three-way solenoid valve calibration system of this utility model, a mechanical valve one is provided on the pipeline between the pneumatic pump with pressure display and the mechanical pressure gauge, a mechanical valve two is provided on the pipeline between the mechanical valve one and the air inlet one of the solenoid valve to be tested, and a mechanical valve three is provided on the pipeline between the mechanical valve one and the air inlet two of the solenoid valve to be tested.

[0010] As a preferred embodiment of the pneumatic three-way solenoid valve calibration system of this utility model, the pressure transmitter with display screen is a pressure transmitter with pressure display, and a mechanical valve is provided on the pipeline between the air outlet of the solenoid valve under test and the air inlet of the pressure transmitter with display screen.

[0011] As a preferred embodiment of the pneumatic three-way solenoid valve calibration system of this utility model, a mechanical valve five is installed on the pipeline between the air tank and the pressure transmitter with a display screen, a safety valve is installed on the outlet pipeline one of the air tank, and an exhaust valve is installed on the outlet pipeline two of the air tank.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The pneumatic solenoid valve calibration system provided in this application can verify the voltage action values ​​of the coil action and reset on both sides of the solenoid valve under test by switching the switch, and can measure the minimum air source pressure action value of the solenoid valve under test. The pneumatic solenoid valve calibration system provided in this application has a simple structure, is safe to use, and is easy to operate. It makes up for the fact that the prior art cannot accurately measure the coil action voltage of the pneumatic solenoid valve and the minimum air source pressure of the solenoid valve action. At the same time, by closing mechanical valve two and mechanical valve three respectively, the valve core can be judged to be in place by displaying the pressure transmitter with a display screen. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 A structural diagram of the pneumatic three-way solenoid valve calibration system provided in this application;

[0015] In the picture:

[0016] 1. Air pump with pressure display; 2. Mechanical valve one; 3. Mechanical pressure gauge; 4. Mechanical valve two; 5. Mechanical valve three; 6. Coil one; 7. Coil two; 8. Solenoid valve to be tested; 9. Switch; 10. Adjustable power supply; 11. Mechanical valve four; 12. Pressure transmitter with display screen; 13. Mechanical valve five; 14. Air tank; 15. Safety valve; 16. Exhaust valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1

[0019] like Figure 1 As shown;

[0020] A pneumatic three-way solenoid valve calibration system includes a pneumatic pump 1 with pressure display and an adjustable power supply 10.

[0021] Based on the above: the air pump 1 with pressure display is connected to the air inlet 1 and the air inlet 2 of the solenoid valve 8 under test through pipelines. The air outlet of the solenoid valve 8 under test is connected to the air inlet of the pressure transmitter 12 with display screen and the air inlet of the air tank 14 through pipelines. The negative terminal of the adjustable power supply device 10 is connected to the inlet terminal of coil 1 6 and the inlet terminal of coil 2 7 through two wires. The outlet terminals of coil 1 6 and coil 2 7 are connected to the two outlet contacts of the switch 9 through wires. The inlet contact of the switch 9 is connected to the positive terminal of the adjustable power supply device 10 through wires.

[0022] In this implementation scheme: the switch 9 is switched to any coil circuit, and the air pressure is adjusted by the air pump 1 with pressure display to half of the maximum air pressure range that the nameplate of the solenoid valve 8 under test can withstand, thus pressurizing the air supply. At the same time, the voltage amplitude of the adjustable power supply device 10 is changed until the touch screen of the pressure transmitter 12 with display screen shows that the air pressure provided by the air pump 1 with pressure display is provided. At this time, the voltage amplitude of the adjustable power supply device 10 is the coil action voltage value on one side of the solenoid valve 8 under test. The air supply is turned off, and the voltage is adjusted to the coil action voltage value. The air supply pressure is adjusted until the screen of the pressure transmitter 12 with display screen shows the air pressure. At this time, the air pressure displayed by the pressure transmitter 12 with display screen is the minimum air pressure for the solenoid valve 8 under test. The air storage tank 14 can be used to store gas when calibrating the high-pressure solenoid valve 8 under test, avoiding the direct discharge of high-pressure air source. Therefore, it can calibrate pneumatic solenoid valves with a large pressure range, while also ensuring personal safety.

[0023] Furthermore:

[0024] In an optional embodiment, the adjustable power supply 10 has a voltage amplitude adjustment range of 0 to 400V and can also display the voltage amplitude, thus it can be applied to solenoid valves of different voltage levels. The adjustable power supply 10 controls coil 6 and coil 7 through a switch 9. The switch 9 can control three pairs of contacts. Coil 7 is connected to the left contact in the switch 9, and coil 6 is connected to the right contact in the switch 9. When in the middle position, the coil control circuit of coil 6 and coil 7 is disconnected. When in the left contact in the switch 9, the coil 7 circuit is closed. When in the right contact in the switch 9, the coil 6 circuit is closed. The air pump 1 with pressure display provides adjustable and displayable air pressure. A mechanical pressure gauge 3 is provided on the pipeline between the air pump 1 with pressure display and the solenoid valve 8 under test for detecting the pressure provided by the air pump 1 with pressure display. The solenoid valve 8 under test is located between coil 6 and coil 7, and coil 7 is located to the right of coil 6.

[0025] In this implementation scheme, the use of switching switch 9 can prevent the coils 6 and 7 on both sides of the pneumatic solenoid valve 8 from being energized simultaneously, thus preventing the valve core from malfunctioning or getting stuck.

[0026] Furthermore:

[0027] In an optional embodiment, a mechanical valve 2 is provided on the pipeline between the pressure pump 1 with pressure display and the mechanical pressure gauge 3, a mechanical valve 4 is provided on the pipeline between the mechanical valve 2 and the air inlet 1 of the solenoid valve 8 to be tested, and a mechanical valve 5 is provided on the pipeline between the mechanical valve 2 and the air inlet 2 of the solenoid valve 8 to be tested.

[0028] In this implementation scheme: Mechanical pressure gauge 3 is used to detect the pressure in the air inlet pipe of the solenoid valve 8 under test; air pump 1 with pressure display is used to change the air source pressure and display the air source pressure; the mechanical pressure gauge 3 detects the pressurization pressure of air pump 1 with pressure display to avoid the applied pressure exceeding the maximum pressure that the solenoid valve 8 under test can bear; mechanical valve 2 is used to control air pump 1 with pressure display to provide air pressure flow; mechanical valve 2 is used to control the flow of gas into air inlet 1 of the solenoid valve 8 under test; and mechanical pressure gauge 3 is used to control the flow of gas into air inlet 2 of the solenoid valve 8 under test.

[0029] Furthermore:

[0030] In an optional embodiment, the pressure transmitter 12 with a display screen is a transmitter with pressure display. A mechanical valve 11 is provided on the pipeline between the outlet of the solenoid valve 8 under test and the inlet of the pressure transmitter 12 with the display screen. The solenoid valve 8 under test can be replaced by closing the mechanical valve 11 according to the pressure range it can withstand.

[0031] In this implementation scheme: the pressure transmitter 12 with display screen is equipped with a display screen. The pressure range of the pressure transmitter 12 with display screen can be changed according to the pressure range of the solenoid valve 8 under test. Therefore, it can test solenoid valves 8 of different specifications. At the same time, the pressure transmitter 12 with display screen can display the outlet pipeline pressure value of the solenoid valve 8 under test and can output an overpressure alarm signal.

[0032] Furthermore:

[0033] In an optional embodiment, a mechanical valve 13 is provided on the pipeline between the gas storage tank 14 and the pressure transmitter 12 with a display screen, a safety valve 15 is installed on the outlet pipeline of the gas storage tank 14, and an exhaust valve 16 is installed on the outlet pipeline of the gas storage tank 14.

[0034] In this implementation plan: After the calibration is completed, the air pump 1 with pressure display is turned off, the exhaust valve 16 is opened, the gas in the pipeline is emptied, and then the solenoid valve is removed to ensure safety. The mechanical valve 13 can be replaced by closing the mechanical valve 13 according to the pressure range that the gas storage tank 14 can withstand. When the gas pressure in the gas storage tank 14 exceeds the safety pressure value set by the safety valve 15 due to various reasons (such as continuous gas supply from the air pump during the calibration process, gas expansion due to heat, etc.), the safety valve 15 will automatically open. This action can promptly discharge excess gas from the gas storage tank 14, preventing the gas storage tank 14 from rupturing, exploding, or other serious safety accidents due to excessive pressure, and ensuring the safety of the entire calibration system and surrounding personnel and equipment.

[0035] Working principle: During use, mechanical valves 1 (2), 2 (4), 3 (5), 4 (11), and 5 (13) are fully open. Switch the selector switch 9 to any coil circuit. Adjust the air pressure through the air pump 1 with pressure display to half of the maximum air pressure range that the solenoid valve 8 under test can withstand, and pressurize it. At the same time, change the voltage amplitude of the adjustable power supply device 10 until the touch screen of the pressure transmitter 12 with display screen shows that the air pump 1 with pressure display is providing air pressure. At this time, the voltage amplitude of the adjustable power supply device 10 is the coil action voltage value of one side of the solenoid valve 8 under test. Turn off the air source and adjust the voltage to the coil action voltage value. Adjust the air source pressure until the air pressure is displayed on the screen of the pressure transmitter 12 with display screen. At this time, the air pressure displayed on the pressure transmitter 12 with display screen is the minimum air pressure for the solenoid valve 8 under test. At the same time, by keeping mechanical valve 2 (4) open and mechanical valve 3 (5) closed, the air pressure display on the pressure transmitter 12 with display screen can be used to determine that the valve core has reached the required position.

[0036] After the calibration is completed, turn off the air pump 1 with pressure display, open the exhaust valve 16 to purge the gas from the pipeline, and then remove the solenoid valve to ensure safety.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic three-way solenoid valve calibration system, comprising a pneumatic pump (1) with pressure display and an adjustable power supply (10), characterized in that: The pressure pump (1) with pressure display is connected to the air inlet one and the air inlet two of the solenoid valve (8) under test through pipelines. The air outlet of the solenoid valve (8) under test is connected to the air inlet of the pressure transmitter (12) with display screen and the air inlet of the air tank (14) through pipelines. The negative terminal of the adjustable power supply device (10) is connected to the inlet terminal of coil one (6) and the inlet terminal of coil two (7) through two wires. The outlet terminals of coil one (6) and coil two (7) are connected to the two outlet contacts of the switch (9) through wires. The inlet contact of the switch (9) is connected to the positive terminal of the adjustable power supply device (10) through wires.

2. The pneumatic three-way solenoid valve calibration system according to claim 1, characterized in that: A mechanical pressure gauge (3) is installed on the pipeline between the pneumatic pump (1) with pressure display and the solenoid valve (8) to be tested.

3. The pneumatic three-way solenoid valve calibration system according to claim 1, characterized in that: The solenoid valve (8) to be tested is located between coil one (6) and coil two (7), and coil two (7) is located to the right of coil one (6).

4. The pneumatic three-way solenoid valve calibration system according to claim 1, characterized in that: A mechanical valve 1 (2) is installed on the pipeline between the air pump (1) with pressure display and the mechanical pressure gauge (3). A mechanical valve 2 (4) is installed on the pipeline between the mechanical valve 1 (2) and the air inlet 1 of the solenoid valve (8) to be tested. A mechanical valve 3 (5) is installed on the pipeline between the mechanical valve 1 (2) and the air inlet 2 of the solenoid valve (8) to be tested.

5. The pneumatic three-way solenoid valve calibration system according to claim 1, characterized in that: The pressure transmitter (12) with display screen is a pressure transmitter with pressure display, and a mechanical valve four (11) is installed on the pipeline between the outlet of the solenoid valve (8) under test and the inlet of the pressure transmitter (12) with display screen.

6. The pneumatic three-way solenoid valve calibration system according to claim 1, characterized in that: A mechanical valve five (13) is installed on the pipeline between the gas storage tank (14) and the pressure transmitter (12) with a display screen. A safety valve (15) is installed on the outlet pipeline one of the gas storage tank (14), and an exhaust valve (16) is installed on the outlet pipeline two of the gas storage tank (14).

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