Flow testing device for solenoid valve
By designing a solenoid valve flow testing device, which utilizes multiple valves and pipeline connections, combined with a pressure device and an energized coil control, efficient testing of the forward and reverse flow of the solenoid valve is achieved. This solves the problem that existing devices can only perform unidirectional testing, thus improving testing efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU KEODA ELECTROMAGNETIC TECHNOLOGY CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-07
AI Technical Summary
Existing solenoid valve flow testing devices can only perform unidirectional testing and cannot complete the testing of both forward and reverse flow rates of a solenoid valve in a single setup, resulting in low testing efficiency and operational errors.
A solenoid valve flow testing device was designed to test the forward and reverse flow of a solenoid valve on a single device. The device utilizes multiple valves and pipelines, which are connected to an air source and a flow meter respectively. By combining a pressure device and an energized coil to control the opening state of the solenoid valve, bidirectional flow testing can be achieved.
The forward and reverse flow tests of solenoid valves can be completed on a single device, avoiding the time wasted on changing test stations and re-clamping, thus improving testing efficiency and accuracy, and making it suitable for rapid testing.
Smart Images
Figure CN224471252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic valve technology, and more specifically, to a flow testing device for electromagnetic valves. Background Technology
[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.
[0003] As a crucial fluid control component, the flow characteristics of solenoid valves (usually expressed as flow capacity Cv or Kv values) are a key performance indicator, directly impacting the efficiency and stability of the entire fluid system. Therefore, precise flow testing is essential during the manufacturing and factory inspection of solenoid valves.
[0004] Currently, most existing solenoid valve flow testing devices are designed for unidirectional testing, meaning that a single device can only test the flow rate in one direction: from port P1 to port P2 (forward) or from port P2 to port P1 (reverse). However, due to the potential asymmetry in the internal structure of the solenoid valve, such as the valve core and flow channels, there may be differences in the flow capacity in both directions. Therefore, there is a need to design a device that can complete the bidirectional flow testing of a solenoid valve in a single setup under the same reference standard.
[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Summary of the Invention
[0006] The technical problem to be solved by this utility model is to provide a flow testing device for a solenoid valve.
[0007] To address the aforementioned technical problems, this utility model provides a flow testing device for a solenoid valve, comprising a test plate. The test plate includes a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The test plate has a mounting hole for installing a solenoid valve. The solenoid valve has ports P1 and P2 and can be in an open or closed state. The first and second air inlets are used to connect to a gas source, and the first and second air outlets are used to connect to a flow meter. When testing the forward flow of the solenoid valve from port P1 to port P2, the solenoid valve is in the open state. Gas from the gas source enters the test plate from the first air inlet, passes through ports P1 and P2 of the solenoid valve, flows out from the first air outlet, and enters the flow meter. When testing the reverse flow of the solenoid valve from port P2 to port P1, the solenoid valve is in the open state. Gas from the gas source enters the test plate from the second air inlet, passes through ports P2 and P1 of the solenoid valve, flows out from the second air outlet, and enters the flow meter.
[0008] Preferably, a first valve and a second valve are respectively installed at the first air inlet and the second air inlet. The first air outlet is connected to the flow meter through a first pipe, and the second air outlet is connected to the flow meter through a second pipe. A third valve is installed on the first pipe, and a fifth valve is installed on the second pipe. When testing the forward flow of the solenoid valve from port P1 to port P2, the first valve and the third valve are open, and the second valve and the fifth valve are closed. When testing the reverse flow of the solenoid valve from port P2 to port P1, the first valve and the third valve are closed, and the second valve and the fifth valve are open.
[0009] Preferably, the flow meter includes a large flow meter and a small flow meter, and the testing device further includes a gas circuit board, which includes a third air inlet, a fourth air inlet, a third air outlet, and a fourth air outlet. The third air outlet is connected to the large flow meter, and the fourth air outlet is connected to the small flow meter. A seventh valve is provided between the third air outlet and the large flow meter, and an eighth valve is provided between the fourth air outlet and the small flow meter. When testing the large flow rate passing through the solenoid valve, the seventh valve is opened and the eighth valve is closed. When testing the small flow rate passing through the solenoid valve, the eighth valve is opened and the seventh valve is closed.
[0010] Preferably, the testing device further includes a leak tester. The first air outlet is connected to the leak tester via a third pipe, and the second air outlet is connected to the leak tester via a fourth pipe. A fourth valve is installed on the third pipe, and a sixth valve is installed on the fourth pipe. When the test solenoid valve is closed and in a forward sealing state from port P1 to port P2, the first and fourth valves are open, and the second, third, fifth, and sixth valves are closed. When the test solenoid valve is closed and in a reverse sealing state from port P2 to port P1, the second and sixth valves are open, and the first, third, fourth, and fifth valves are closed.
[0011] Preferably, the testing device further includes a pressure holding valve, and the third and fourth pipes are connected to the pressure holding valve, and then connected to the leakage tester through the pressure holding valve.
[0012] Preferably, a first pressure gauge is installed in the air path between the first air inlet and the solenoid valve P1 port to monitor the inlet pressure of the solenoid valve; a second pressure gauge is installed in the air path between the second air inlet and the solenoid valve P2 port to monitor the inlet pressure of the solenoid valve.
[0013] Preferably, the testing device includes a pressing device, which is equipped with an energized coil. The pressing device can move the energized coil downwards to cover the solenoid valve, and control the opening and closing of the solenoid valve through the energized coil.
[0014] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0015] The flow testing device for solenoid valves of this invention can test the flow rate of the solenoid valve in both the forward (P1→P2) and reverse (P2→P1) directions on a single device, avoiding the time waste and operational errors caused by changing test stations or re-clamping workpieces, thus improving testing efficiency and making it suitable for rapid testing. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the flow testing device of this utility model.
[0017] Figure 2 This is a partial structural schematic diagram of the flow testing device of this utility model.
[0018] Figure 3 This is a schematic diagram of the flow testing device of this utility model.
[0019] The components include: 1. Test board; 11. First air inlet; 12. Second air inlet; 13. First air outlet; 14. Second air outlet; 100. Pressurizing device; 200. Energizing coil; 2. Solenoid valve; 31. First pressure gauge; 32. Second pressure gauge; 4. Air circuit board; 41. Third air inlet; 42. Fourth air inlet; 43. Third air outlet; 44. Fourth air outlet; 5. Large flow meter; 6. Small flow meter; 7. Pressure holding valve; 8. Leakage tester; 91. First valve; 92. Second valve; 93. Third valve; 94. Fourth valve; 95. Fifth valve; 96. Sixth valve; 97. Seventh valve; 98. Eighth valve; 101. First pipeline; 102. Second pipeline; 103. Third pipeline; 104. Fourth pipeline. Detailed Implementation
[0020] 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.
[0021] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0022] like Figure 1-3As shown, this utility model provides a flow testing device for a solenoid valve 2, including a test plate 1. The test plate 1 includes a first air inlet 11, a second air inlet 12, a first air outlet 13, and a second air outlet 14. The test plate 1 has a mounting hole for installing the solenoid valve 2. The solenoid valve 2 has a P1 port and a P2 port and can be in an open or closed state. The first air inlet 11 and the second air inlet 12 are used to communicate with an air source, and the first air outlet 13 and the second air outlet 14 are used to communicate with a flow source. The flow meter is configured such that when testing the forward flow of solenoid valve 2 from port P1 to port P2, solenoid valve 2 is in the open state. Gas from the gas source enters the test plate 1 from the first inlet 11, passes through ports P1 and P2 of solenoid valve 2, and flows out from the first outlet 13 into the flow meter. When testing the reverse flow of solenoid valve 2 from port P2 to port P1, solenoid valve 2 is in the open state. Gas from the gas source enters the test plate 1 from the second inlet 12, passes through ports P2 and P1 of solenoid valve 2, and flows out from the second outlet 14 into the flow meter. The testing device includes a pressing device 100, which is equipped with an energized coil 200. The pressing device 100 can move the energized coil 200 downwards to cover the solenoid valve 2, controlling the opening and closing of the solenoid valve 2 through the energized coil 200. This flow testing device can test the flow rate of solenoid valve 2 in both the forward (P1→P2) and reverse (P2→P1) directions on a single device, avoiding the time waste and operational errors caused by changing test stations or re-clamping workpieces, thus improving testing efficiency and making it suitable for rapid testing. Specifically, a first valve 91 and a second valve 92 are respectively installed at the first air inlet 11 and the second air inlet 12. The first air outlet 13 is connected to the flow meter through a first pipe 101, and the second air outlet 14 is connected to the flow meter through a second pipe 102. A third valve 93 is installed on the first pipe 101, and a fifth valve 95 is installed on the second pipe 102. When testing the forward flow of the solenoid valve 2 from port P1 to port P2, the first valve 91 and the third valve 93 are opened, and the second valve 92 and the fifth valve 95 are closed. When testing the reverse flow of the solenoid valve 2 from port P2 to port P1, the first valve 91 and the third valve 93 are closed, and the second valve 92 and the fifth valve 95 are opened.
[0023] The flow meters include a large flow meter 5 and a small flow meter 6. The testing device also includes a gas path plate 4, which includes a third air inlet 41, a fourth air inlet 42, a third air outlet 43, and a fourth air outlet 44. The third air outlet 43 is connected to the large flow meter 5, and the fourth air outlet 44 is connected to the small flow meter 6. A seventh valve 97 is provided between the third air outlet 43 and the large flow meter 5, and an eighth valve 98 is provided between the fourth air outlet 44 and the small flow meter 6. When testing the large flow rate passing through the solenoid valve 2, the seventh valve 97 is opened and the eighth valve 98 is closed. When testing the small flow rate passing through the solenoid valve 2, the eighth valve 98 is opened and the seventh valve 97 is closed. The large flow meter 5 is used to measure higher flow rates, but its relative error increases when the flow rate is very low. Therefore, when measuring lower flow rates, the small flow meter 6 can be used, achieving a wide range of flow rate measurement for the solenoid valve 2 while protecting the precision small flow meter 6.
[0024] The testing device further includes a leak tester 8. The first air outlet 13 is connected to the leak tester 8 via a third pipe 103, and the second air outlet 14 is connected to the leak tester 8 via a fourth pipe 104. A fourth valve 94 is installed on the third pipe 103, and a sixth valve 96 is installed on the fourth pipe 104. When the test solenoid valve 2 is closed and in a forward sealing state from port P1 to port P2, the first valve 91 and the fourth valve 94 are open, and the second valve 92, the third valve 93, the fifth valve 95, and the sixth valve 96 are closed. When the test solenoid valve 2 is closed and in a reverse sealing state from port P2 to port P1, the second valve 92 and the sixth valve 96 are open, and the first valve 91, the third valve 93, the fourth valve 94, and the fifth valve 95 are closed. The testing device also includes a pressure holding valve 7. The third pipe 103 and the fourth pipe 104 are connected to the pressure holding valve 7, and then the pressure holding valve 7 is connected to the leak tester 8. Due to the microscopic asymmetry of the valve core and valve seat structure, the sealing capability of solenoid valve 2 may differ in the two directions. This testing device can test the "forward sealing performance" and "reverse sealing performance" of solenoid valve 2 separately, improving the accuracy of the test. In addition, this testing device realizes the integrated measurement of the flow performance and sealing performance of solenoid valve 2. Only one clamping is required to obtain two sets of key performance data: flow rate and sealing performance.
[0025] In a preferred embodiment, a first pressure gauge 31 is provided in the air path between the first air inlet 11 and the solenoid valve 2P1 port to monitor the inlet pressure of the solenoid valve 2; a second pressure gauge 32 is provided in the air path between the second air inlet 12 and the solenoid valve 2P2 port to monitor the inlet pressure of the solenoid valve 2.
[0026] The working principle of the flow testing device for solenoid valve 2 in this application is as follows:
[0027] Forward flow test: Control the pressure-reducing device 100 to move the energized coil 200 downwards until it covers the solenoid valve 2, energizing the coil 200 to open the solenoid valve 2. Open the first valve 91 and the third valve 93, and close the second valve 92 and the fifth valve 95. If testing a large flow rate, open the seventh valve 97 of the gas circuit board 4 and close the eighth valve 98; if testing a small flow rate, open the eighth valve 98 and close the seventh valve 97. The gas source enters the test board 1 from the first inlet 11, passes through the P1 and P2 ports of the solenoid valve 2, flows out from the first outlet 13, and enters the corresponding flow meter through the first pipe 101 to complete the test. At the same time, the first pressure gauge 31 monitors the inlet pressure.
[0028] Reverse flow test: Keep solenoid valve 2 open (controlled by energized coil 200). Close first valve 91 and third valve 93, and open second valve 92 and fifth valve 95. Select either seventh valve 97 (high flow) or eighth valve 98 (low flow) to open according to the flow rate, and close the corresponding valve. Gas source gas enters test plate 1 from second inlet 12, passes through solenoid valve 2 P2 port and P1 port, flows out from second outlet 14, enters the corresponding flow meter through second pipe 102 to complete the test, and second pressure gauge 32 monitors the inlet pressure.
[0029] Forward sealing test: Control the energized coil 200 to keep solenoid valve 2 in the closed state. Open the first valve 91 and the fourth valve 94, and close the second valve 92, the third valve 93, the fifth valve 95, and the sixth valve 96. If there is a leak in solenoid valve 2, the gas source enters from the first air inlet 11, and the gas passes through the relevant path, through the third pipe 103 and the pressure holding valve 7, and enters the leak tester 8 to complete the test.
[0030] Reverse sealing test: Keep solenoid valve 2 closed. Open the second valve 92 and the sixth valve 96, and close the first valve 91, the third valve 93, the fourth valve 94, and the fifth valve 95. If there is a leak in solenoid valve 2, the gas source enters from the second air inlet 12, and the gas passes through the relevant path, through the fourth pipe 104 and the pressure holding valve 7, and enters the leak tester 8 to complete the test.
[0031] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.
Claims
1. A flow testing device for a solenoid valve, characterized in that, The test board includes a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The test board has a mounting hole for installing a solenoid valve. The solenoid valve has a P1 port and a P2 port and can be in an open or closed state. The first and second air inlets are used to connect to an air source, and the first and second air outlets are used to connect to a flow meter. When testing the positive flow rate of the solenoid valve from port P1 to port P2, the solenoid valve is in the open state. The gas from the gas source enters the test plate from the first inlet, passes through the solenoid valve ports P1 and P2, flows out from the first outlet and enters the flow meter. When testing the reverse flow of the solenoid valve from port P2 to port P1, the solenoid valve is in the open state. The gas from the gas source enters the test plate from the second inlet, passes through the solenoid valve ports P2 and P1, flows out from the second outlet and enters the flow meter.
2. The testing apparatus according to claim 1, characterized in that, A first valve and a second valve are respectively installed at the first air inlet and the second air inlet. The first air outlet is connected to the flow meter via a first pipe, and the second air outlet is connected to the flow meter via a second pipe. A third valve is installed on the first pipe, and a fifth valve is installed on the second pipe. When testing the positive flow rate of the solenoid valve from port P1 to port P2, the first and third valves are opened, and the second and fifth valves are closed. When testing the reverse flow of the solenoid valve from port P2 to port P1, the first and third valves are closed, and the second and fifth valves are open.
3. The testing apparatus according to claim 2, characterized in that, The flow meters include large flow meters and small flow meters, and the testing device also includes a gas circuit board. The air circuit board includes a third air inlet, a fourth air inlet, a third air outlet, and a fourth air outlet. The third air outlet is connected to the large flow meter, and the fourth air outlet is connected to the small flow meter. A seventh valve is installed between the third air outlet and the high flow meter. An eighth valve is provided between the fourth air outlet and the small flow meter. When testing a large flow rate through the solenoid valve, open the seventh valve and close the eighth valve. When testing a small flow rate through the solenoid valve, open the eighth valve and close the seventh valve.
4. The testing apparatus according to claim 3, characterized in that, The testing apparatus also includes a leak tester. The first air outlet is connected to the leak tester via a third pipe, and the second air outlet is connected to the leak tester via a fourth pipe. A fourth valve is installed on the third pipe, and a sixth valve is installed on the fourth pipe. When the test solenoid valve is closed and the positive sealing state from port P1 to port P2 is achieved, the first valve and the fourth valve are opened, and the second valve, the third valve, the fifth valve and the sixth valve are closed. When the test solenoid valve is closed and the reverse sealing state is achieved from port P2 to port P1, the second and sixth valves open, while the first, third, fourth, and fifth valves close.
5. The testing apparatus according to claim 4, characterized in that, The testing device also includes a pressure holding valve, and the third and fourth pipes are connected to the pressure holding valve, and then connected to the leakage tester through the pressure holding valve.
6. The testing apparatus according to claim 1, characterized in that, A first pressure gauge is installed in the air path between the first air inlet and the solenoid valve P1 port to monitor the inlet pressure of the solenoid valve; a second pressure gauge is installed in the air path between the second air inlet and the solenoid valve P2 port to monitor the inlet pressure of the solenoid valve.
7. The testing apparatus according to claim 1, characterized in that, The testing device includes a pressing device equipped with an energized coil. The pressing device can move the energized coil downwards to cover the solenoid valve, thereby controlling the opening and closing of the solenoid valve through the energized coil.