An automatic detection device for a pressure retaining valve

Abstract

The utility model provides a kind of pressure retaining valve automatic detection device, including gas source and detection system, the detection system includes electrical proportional valve and detection pipeline, the gas source is connected with electrical proportional valve, the detection pipeline includes first pipeline and second pipeline, one end of the first pipeline and second pipeline is connected with electrical proportional valve, the other end of the first pipeline is connected with analog air spring, pressure retaining valve's air spring interface, the other end of the second pipeline is connected with pressure retaining valve's air pump interface, first pressure gauge, first switch valve, first exhaust valve are set on the first pipeline, the first exhaust valve is between first switch valve and pressure retaining valve, second pressure gauge, second switch valve, second exhaust valve are set on the second pipeline, the second exhaust valve is between second switch valve and pressure retaining valve.The utility model can realize the inner cavity opening pressure test of pressure retaining valve, outer cavity opening pressure test and leakage test.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure holding valve testing devices, specifically to an automated testing device for pressure holding valves. Background Technology

[0002] As a key pressure control component, the pressure holding valve of the air spring has the core function of maintaining stable internal pressure and retaining a certain amount of air pressure in the event of pipeline leakage or disconnection, without affecting normal inflation operations. The pressure holding valve must possess high durability and reliability under complex operating conditions such as changes in pressure difference between the two ends and temperature fluctuations, and its performance directly affects the safety and service life of the vehicle suspension system.

[0003] Chinese invention patent application CN116793654A discloses a testing device and method for an air spring pressure holding valve. This device achieves automated durability testing of the pressure holding valve through two accumulators and an air compressor. However, this device cannot test the internal cavity opening pressure, external cavity opening pressure, or leakage of the pressure holding valve. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an automated testing device for pressure-holding valves, capable of testing the internal cavity opening pressure, external cavity opening pressure, and leakage of the pressure-holding valve.

[0005] To solve the above-mentioned technical problems, this utility model provides an automated detection device for a pressure holding valve, including an air source and a detection system. The detection system includes an electro-proportional valve and a detection pipeline. The air source is connected to the electro-proportional valve. The detection pipeline includes a first pipeline and a second pipeline. One end of both the first pipeline and the second pipeline is connected to the electro-proportional valve. The other end of the first pipeline is connected to a simulated air spring and the air spring interface of the pressure holding valve. The other end of the second pipeline is connected to the air pump interface of the pressure holding valve. A first pressure gauge, a first switching valve, and a first exhaust valve are installed on the first pipeline. The first exhaust valve is located between the first switching valve and the pressure holding valve. A second pressure gauge, a second switching valve, and a second exhaust valve are installed on the second pipeline. The second exhaust valve is located between the second switching valve and the pressure holding valve.

[0006] In some embodiments, the detection pipeline includes a third pipeline, the two ends of which are connected to a first pipeline and a second pipeline, respectively. The connection between the third pipeline and the first pipeline is located between a first switching valve and a first exhaust valve, and the connection between the third pipeline and the second pipeline is located between a second switching valve and a second exhaust valve. A flow meter, a third switching valve, and a fourth switching valve are installed on the third pipeline. The third switching valve and the fourth switching valve are used to control whether the third pipeline is connected to the first pipeline and whether the third pipeline is connected to the second pipeline, respectively.

[0007] In some embodiments, a controller is also included, which controls an electro-proportional valve, a first switching valve, a first exhaust valve, a second switching valve, a second exhaust valve, a third switching valve, and a fourth switching valve to achieve automatic detection.

[0008] In some embodiments, a manual shut-off valve is provided on both the first pipeline and the second pipeline.

[0009] In some embodiments, a testing platform is further included, on which a positioning fixture is provided. The positioning fixture is provided with a first air port and a second air port. The positioning fixture is used to fix the pressure holding valve and to seal the first air port and the second air port to the air pump interface and the air spring interface of the pressure holding valve, respectively.

[0010] In some embodiments, the positioning fixture includes a positioning seat and a pressing and sealing mechanism. The first air port and the second air port are respectively opened on the positioning seat and the pressing and sealing mechanism. The pressing and sealing mechanism is used to press and fix the pressure holding valve on the positioning seat, and to seal the first air port and the second air port to the air pump interface and the air spring interface of the pressure holding valve, respectively.

[0011] In some embodiments, a positioning hole is provided on the positioning seat, and the bottom end of the positioning hole is connected to the first air port, so that after the pressure holding valve is installed in the positioning hole, the air pump interface of the pressure holding valve is connected to the first air port.

[0012] In some embodiments, the pressing and sealing mechanism includes a bracket and a pressing drive mechanism. The pressing drive mechanism is mounted on the bracket, and a pressing block is provided at the output end of the pressing drive mechanism. The second air port is opened on the pressing block, so that after the pressing block presses the pressure holding valve, the air spring interface of the pressure holding valve is connected to the second air port.

[0013] Furthermore, sealing gaskets are provided at the bottom of the positioning hole and on the clamping block.

[0014] In some embodiments, a vertical plate is provided on the testing platform, the testing system is located on one side of the vertical plate, the positioning fixture is located on the other side of the vertical plate, and a wire-passing hole is provided on the vertical plate. The first pipeline and the second pipeline are both connected to the positioning fixture through the wire-passing hole.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model can realize the internal cavity opening pressure test, external cavity opening pressure test, and leakage test of the pressure holding valve.

[0017] 2. This utility model uses a positioning fixture to fix the pressure holding valve and seal the two ends of the pressure holding valve, which ensures the stability of the pressure holding valve and the accuracy of the test results during the testing process.

[0018] 3. This utility model can realize the automatic detection of pressure holding valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the detection system of this utility model;

[0020] Figure 2 This is a front view of the automated testing device for pressure-holding valves of this utility model;

[0021] Figure 3 This is a side view of the automated testing device for the pressure-holding valve of this utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a cross-sectional view of the positioning seat of this utility model;

[0024] Figure 6 This is a rear view of the automated testing device for the pressure-holding valve of this utility model.

[0025] Reference numerals: 1. Testing platform; 11. Vertical plate; 12. Wire hole; 13. Push cylinder; 14. Track; 2. Positioning fixture; 21. Positioning seat; 21. First air port; 211. Slider; 22. Bracket; 23. Pressing drive mechanism; 24. Pressing block; 25. Second air port; 251. Testing system; 3. Electro-proportional valve; 31. Main valve; 32. First pipeline; 33. First pressure gauge; 331. First switch valve; 332. First exhaust valve; 333. First manual shut-off valve; 334. Second pipeline; 34. Second pressure gauge; 341. Second switch valve; 342. Second exhaust valve; 343. Second manual shut-off valve; 344. Third pipeline; 35. Flow meter; 351. Third switch valve; 352. Fourth switch valve; 353. Simulated air spring; 4. Pressure holding valve; 5. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] like Figure 1As shown, this utility model provides an automated testing device for a pressure-holding valve, including a gas source and a testing system 3. The testing system 3 includes an electro-proportional valve 31 and a testing pipeline. The gas source is connected to the electro-proportional valve 31. The testing pipeline includes a first pipeline 33 and a second pipeline 34, which are connected in parallel. One end of each of the first pipeline 33 and the second pipeline 34 is connected to the electro-proportional valve 31. A main valve 32 is installed on the pipelines connecting the first pipeline 33 and the second pipeline 34 to the electro-proportional valve 31. The other end of the first pipeline 33 is connected to the simulated air spring 4 and the air spring interface of the pressure-holding valve 5 (i.e., Figure 1 The left end of the pressure-holding valve 5 is connected, and the other end of the second pipeline 34 is connected to the air pump interface of the pressure-holding valve 5 (i.e., Figure 1 The right end of the pressure holding valve 5 is connected to the first pipeline 33, which is equipped with a first pressure gauge 331, a first switch valve 332, and a first exhaust valve 333. The first pressure gauge 331 can detect the pressure of the simulated air spring 4. The first exhaust valve 333 is located between the first switch valve 332 and the pressure holding valve 5. The second pipeline 34 is equipped with a second pressure gauge 341, a second switch valve 342, and a second exhaust valve 343. The second pressure gauge 341 can detect the pressure at one end of the air pump interface of the pressure holding valve 5. The second exhaust valve 343 is located between the second switch valve 342 and the pressure holding valve 5.

[0028] Understandably, by using a gas source and an electro-proportional valve 31, opening the main valve 32 and the second switch valve 342, gas at a set pressure can be introduced into the simulated air spring 4 through the second pipeline 34, simulating the intake of the pressure holding valve 5. Through the second exhaust valve 343, some of the gas in the simulated air spring 4 can be discharged, simulating the exhaust of the pressure holding valve 5, thus achieving the intake and exhaust of the pressure holding valve 5. Furthermore, the intake pressure of the pressure holding valve 5 can be directly adjusted according to the electro-proportional valve 31. Specific testing methods include:

[0029] Open the main valve 32, the first switch valve 332, and the second exhaust valve 343. Gas can be directly injected into the simulated air spring 4 through the first pipeline 33. When the pressure of the gas in the simulated air spring 4 is greater than the opening pressure of the inner cavity of the pressure holding valve 5, the gas in the simulated air spring 4 enters the second pipeline 34 through the pressure holding valve 5 and is discharged from the second exhaust valve 343. The exhaust situation at the second exhaust valve 343 can be monitored (using a flow meter installed at the second exhaust valve 343). Read the reading of the first pressure gauge 331 to detect the opening pressure of the inner cavity of the pressure holding valve 5.

[0030] By opening the main valve 32, the first switch valve 332, and the second exhaust valve 343, gas can be directly injected into the simulated air spring 4 through the first pipeline 33. The exhaust volume at the second exhaust valve 343 can be monitored to detect the leakage of the pressure holding valve 5.

[0031] Open the main valve 32, the second switch valve 342, and the first exhaust valve 333. When the pressure of the gas in the second pipeline 34 is greater than the opening pressure of the outer cavity of the pressure holding valve 5, the gas in the second pipeline 34 enters the first pipeline 33 through the pressure holding valve 5 and is discharged from the first exhaust valve 333. The exhaust situation at the first exhaust valve 333 can be monitored (using a flow meter installed at the first exhaust valve 333). Read the reading of the second pressure gauge 341 to obtain the opening pressure of the outer cavity of the pressure holding valve 5.

[0032] Therefore, this automated pressure-holding valve testing device can perform internal cavity opening pressure testing, external cavity opening pressure testing, and leakage testing of the pressure-holding valve 5, and has a simple structure.

[0033] like Figure 1 As shown, in some embodiments, the detection pipeline includes a third pipeline 35, with both ends of the third pipeline 35 connected to the first pipeline 33 and the second pipeline 34, respectively. The connection between the third pipeline 35 and the first pipeline 33 is located between the first switch valve 332 and the first exhaust valve 333, and the connection between the third pipeline 35 and the second pipeline 34 is located between the second switch valve 342 and the second exhaust valve 343. A flow meter 351, a third switch valve 352, and a fourth switch valve 353 are installed on the third pipeline 35. The third switch valve 352 and the fourth switch valve 353 are used to control whether the third pipeline 35 is connected to the first pipeline 33 and whether the third pipeline 35 is connected to the second pipeline 34, respectively.

[0034] It is understandable that when testing the leakage of pressure holding valve 5, the main valve 32, the first switch valve 332, and the fourth switch valve 353 are opened, the simulated air spring 4 is charged to a certain pressure, the main valve 32 and the first switch valve 332 are closed, and the leakage of pressure holding valve 5 can be obtained by directly detecting the change of flow meter 351 on the third pipeline 35.

[0035] When testing the opening pressure of the pressure holding valve 5, the main valve 32, the first switch valve 332, and the fourth switch valve 353 are opened. Gas can be directly injected into the simulated air spring 4 through the first pipeline 33. When the pressure of the gas in the simulated air spring 4 is greater than the opening pressure of the pressure holding valve 5, the gas in the simulated air spring 4 enters the second pipeline 34 through the pressure holding valve 5 and is discharged from the third pipeline 35. When the flow rate in the flow meter 351 is greater than the set flow rate, the reading of the first pressure gauge 331 is read to detect the opening pressure of the pressure holding valve 5.

[0036] When testing the opening pressure of the outer cavity of the pressure holding valve 5, open the main valve 32, the second switch valve 342, and the third switch valve 352. When the pressure of the gas in the second pipeline 34 is greater than the opening pressure of the outer cavity of the pressure holding valve 5, the gas in the second pipeline 34 enters the first pipeline 33 through the pressure holding valve 5 and is discharged from the third pipeline 35. When the flow rate in the flow meter 351 is greater than the set flow rate, read the reading of the second pressure gauge 341 to detect the opening pressure of the outer cavity of the pressure holding valve 5.

[0037] In some embodiments, the pressure-holding valve automated detection device includes a controller for controlling an electro-proportional valve 31, a first switching valve 332, a first exhaust valve 333, a second switching valve 342, a second exhaust valve 343, a third switching valve 352, and a fourth switching valve 353, thereby achieving automatic detection.

[0038] It is understandable that the automatic detection of pressure holding valve 5 can be achieved by setting the opening and closing times and conditions of each valve. The aforementioned valves can be solenoid valves.

[0039] In some embodiments, a manual shut-off valve is provided on both the first pipeline 33 and the second pipeline 34.

[0040] In some embodiments, such as Figure 2 As shown, the automated testing device for the pressure holding valve includes a testing platform 1, on which a positioning fixture 2 is provided. The positioning fixture 2 is used to fix the pressure holding valve 5. The positioning fixture 2 is provided with a first air port 211 and a second air port 251. The positioning fixture 2 is used to fix the pressure holding valve 5 and to seal the first air port 211 and the second air port 251 to the air pump interface and the air spring interface of the pressure holding valve 5, respectively.

[0041] like Figure 4 As shown, the positioning fixture 2 includes a positioning seat 21 and a pressing and sealing mechanism. The first air port 211 and the second air port 251 are respectively opened on the positioning seat 21 and the pressing and sealing mechanism. The pressing and sealing mechanism is used to press and fix the pressure holding valve 5 on the positioning seat 21, and to seal the first air port 211 and the second air port 251 with the air pump interface and the air spring interface of the pressure holding valve 5 respectively, so as to ensure the accuracy of the test.

[0042] In some embodiments, such as Figure 5 As shown, a positioning hole is provided on the positioning seat 21, and the bottom end of the positioning hole is connected to the first air port 211, so that after the pressure holding valve 5 is installed in the positioning hole, the air pump interface of the pressure holding valve 5 is connected to the first air port 211, that is... Figure 5 The bottom end of the pressure holding valve 5 is connected to the first air port 211.

[0043] like Figure 4As shown, the pressing and sealing mechanism includes a bracket 23 and a pressing drive mechanism 24. The pressing drive mechanism 24 can be a cylinder. The pressing drive mechanism 24 is mounted on the bracket 23. A pressing block 25 is provided at the output end of the pressing drive mechanism 24. A second air port 251 is opened on the pressing block 25, so that after the pressing block 25 presses the pressure holding valve 5, the air spring interface of the pressure holding valve 5 is connected to the second air port 251, that is, the top of the pressure holding valve 5 is connected to the second air port 251. The pressing drive mechanism 24 can be a cylinder.

[0044] In some embodiments, sealing gaskets are provided at the bottom of the positioning hole and on the clamping block 25 to ensure the sealing of the connection.

[0045] In some embodiments, such as Figure 4 As shown, the testing table 1 is equipped with a push cylinder 13 and a track 14. The bottom of the positioning seat 21 is fixedly equipped with a slider 22, which is slidably mounted on the track 14. The output end of the push cylinder 13 is connected to the slider 22, which is used to push the positioning seat 21 out of the bracket 23 or pull it back into the bracket 23.

[0046] like Figure 2 , 3 As shown in Figure 6, a vertical plate 11 is installed on the testing table 1. The testing system 3 is located on one side of the vertical plate 11, and the positioning fixture 2 is located on the other side of the vertical plate 11. A wire-passing hole 12 is opened on the vertical plate 11, and the first pipeline 33 and the second pipeline 34 are both connected to the positioning fixture 2 through the wire-passing hole 12. Multiple sets of testing systems 3 can be installed on the vertical plate 1, and multiple positioning fixtures 2 can be installed on the testing table 1. Each positioning fixture 2 corresponds to one testing system 3, thereby realizing the testing of multiple pressure holding valves 5.

[0047] The usage method of this automated pressure-holding valve testing device includes:

[0048] Connect the first air port 211 of the positioning seat 21 to the second pipeline 34 in advance, and connect the second air port 251 of the clamping block 25 to the first pipeline 33. Manually install multiple pressure holding valves 5 into the positioning holes of the positioning seat 21. Press the opening test button, and the controller controls the push cylinder 13 to move the positioning seat 21 directly below the clamping and sealing mechanism. The clamping drive mechanism 24 drives the clamping block 25 to clamp and fix the pressure holding valve 5 on the positioning seat 21, so that the first air port 211 and the second air port 251 are respectively sealed and connected to the air pump interface and air spring interface of the pressure holding valve 5.

[0049] Next, the controller automatically controls the opening and closing of each valve to detect the pressure holding valve 5 (the first manual shut-off valve 334 and the second manual shut-off valve 344 are normally open, and the remaining valves are normally closed):

[0050] Internal cavity opening pressure detection: Adjust the electric proportional valve 31 to open the main valve 32, the first switch valve 332, and the fourth switch valve 353. Slowly pressurize the pressure holding valve 5 through the first pipeline 33. When the flow rate of the flow meter 351 is detected to be greater than the first set flow rate, record the pressure of the first pressure gauge 331 as the internal cavity opening pressure of the pressure holding valve 5.

[0051] External cavity opening pressure detection: Adjust the electric proportional valve 31 to open the main valve 32, the second switch valve 342, and the third switch valve 352. Slowly pressurize the pressure holding valve 5 through the second pipeline 34. When the flow rate of the flow meter 351 is detected to be greater than the second set flow rate, record the pressure of the second pressure gauge 341 as the external cavity opening pressure of the pressure holding valve 5.

[0052] Leakage detection: Adjust the electric proportional valve 31, open the main valve 32, the first switch valve 332, and the fourth switch valve 353, and pressurize the pressure holding valve 5 to the set pressure through the first pipeline 33 and hold the pressure for a period of time. If the flow rate of the flow meter 351 is less than the third set flow rate, it means that the leakage test of the pressure holding valve 5 is qualified.

[0053] After the test is completed, the controller controls the clamping drive mechanism 24 to raise the clamping block 25 to the initial position, pushes the cylinder 13 to move the positioning seat 21 to the initial position, and manually removes the pressure holding valve 5.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An automated testing device for pressure-holding valves, characterized in that, The system includes a gas source and a detection system (3). The detection system (3) includes an electro-proportional valve (31) and a detection pipeline. The gas source is connected to the electro-proportional valve (31). The detection pipeline includes a first pipeline (33) and a second pipeline (34). One end of both the first pipeline (33) and the second pipeline (34) is connected to the electro-proportional valve (31). The other end of the first pipeline (33) is connected to the air spring interface of the simulated air spring (4) and the pressure holding valve (5). The other end of the second pipeline (34) is connected to the pressure holding valve (4). 5) The air pump interface is connected. The first pipeline (33) is equipped with a first pressure gauge (331), a first switch valve (332) and a first exhaust valve (333). The first exhaust valve (333) is located between the first switch valve (332) and the pressure holding valve (5). The second pipeline (34) is equipped with a second pressure gauge (341), a second switch valve (342) and a second exhaust valve (343). The second exhaust valve (343) is located between the second switch valve (342) and the pressure holding valve (5).

2. The automated testing device for pressure-holding valves according to claim 1, characterized in that, The detection pipeline includes a third pipeline (35), with its two ends connected to the first pipeline (33) and the second pipeline (34) respectively. The connection between the third pipeline (35) and the first pipeline (33) is located between the first switch valve (332) and the first exhaust valve (333), and the connection between the third pipeline (35) and the second pipeline (34) is located between the second switch valve (342) and the second exhaust valve (343). A flow meter (351), a third switch valve (352), and a fourth switch valve (353) are installed on the third pipeline (35). The third switch valve (352) and the fourth switch valve (353) are used to control whether the third pipeline (35) is connected to the first pipeline (33) and whether the third pipeline (35) is connected to the second pipeline (34).

3. The automated testing device for pressure-holding valves according to claim 2, characterized in that, The system includes a controller for controlling an electro-proportional valve (31), a first switch valve (332), a first exhaust valve (333), a second switch valve (342), a second exhaust valve (343), a third switch valve (352), and a fourth switch valve (353) to achieve automatic detection.

4. The automated testing device for pressure-holding valves according to claim 1, characterized in that, Manual shut-off valves are installed on both the first pipeline (33) and the second pipeline (34).

5. The automated testing device for pressure-holding valves according to any one of claims 1 to 4, characterized in that, The device includes a testing platform (1), on which a positioning fixture (2) is provided. The positioning fixture (2) is provided with a first air port (211) and a second air port (251). The positioning fixture (2) is used to fix the pressure holding valve (5) and to seal the first air port (211) and the second air port (251) to the air pump interface and the air spring interface of the pressure holding valve (5) respectively.

6. The automated testing device for pressure-holding valves according to claim 5, characterized in that, The positioning fixture (2) includes a positioning seat (21) and a pressing and sealing mechanism. The first air port (211) and the second air port (251) are respectively opened on the positioning seat (21) and the pressing and sealing mechanism. The pressing and sealing mechanism is used to press and fix the pressure holding valve (5) on the positioning seat (21) and make the first air port (211) and the second air port (251) respectively sealed and connected to the air pump interface and the air spring interface of the pressure holding valve (5).

7. The automated testing device for pressure-holding valves according to claim 6, characterized in that, The positioning seat (21) has a positioning hole, the bottom of which is connected to the first air port (211), so that after the pressure holding valve (5) is installed in the positioning hole, the air pump interface of the pressure holding valve (5) is connected to the first air port (211).

8. The automated testing device for pressure-holding valves according to claim 7, characterized in that, The pressing and sealing mechanism includes a bracket (23) and a pressing drive mechanism (24). The pressing drive mechanism (24) is mounted on the bracket (23). A pressing block (25) is provided at the output end of the pressing drive mechanism (24). The second air port (251) is opened on the pressing block (25), so that after the pressing block (25) presses the pressure holding valve (5), the air spring interface of the pressure holding valve (5) is connected to the second air port (251).

9. The automated testing device for pressure-holding valves according to claim 8, characterized in that, Sealing gaskets are provided at the bottom of the positioning hole and on the clamping block (25).

10. The automated testing device for pressure-holding valves according to claim 5, characterized in that, The testing platform (1) is provided with a vertical plate (11), the testing system (3) is located on one side of the vertical plate (11), the positioning fixture (2) is located on the other side of the vertical plate (11), and a wire hole (12) is opened on the vertical plate (11). The first pipeline (33) and the second pipeline (34) are both connected to the positioning fixture (2) through the wire hole (12).

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