Pulse solenoid valve test board and detection method

Abstract

The invention relates to the technical field of testing, in particular to a pulse solenoid valve test board which comprises a water tank, a pulse solenoid valve body is arranged in the middle of the water tank, a supporting mechanism is arranged in the middle of the water tank, and the supporting mechanism is used for being matched with the pulse solenoid valve body for detection. A turbulent flow mechanism is arranged in the middle of the side face of the pulse electromagnetic valve body, a flow guiding mechanism is arranged in the middle of the water tank, the pulse electromagnetic valve is tested by changing the state of water flow, and when a turbulent flow assembly is not started, the water flow flowing into the pulse electromagnetic valve body can directly hit a valve in the pulse electromagnetic valve body; meanwhile, the turbulent flow mechanism can be intermittently opened and closed, so that when the pulse electromagnetic valve body is tested, the change state of water flow in the testing process can be improved, and the pulse electromagnetic valve body can be comprehensively tested.

Description

Technical Field

[0001] The present invention relates to the technical field of testing, and specifically, to a pulse solenoid valve test bench and a detection method. Background Technique

[0002] A pulse solenoid valve is an electromagnetic driving device that quickly controls the on-off of gas or fluid through an electric pulse signal, and is mainly used for high-precision and high-frequency fluid control in industrial scenarios. Its core function is to drive the valve core or diaphragm to act instantaneously through the magnetic field generated by the electromagnetic coil, forming a pulsed air flow to achieve precise opening and closing of the fluid passage.

[0003] Before using the pulse solenoid valve, it is necessary to conduct spot checks to ensure the stability of the device during use. Before testing, the power supply needs to be disconnected and the pipeline pressure needs to be emptied to prevent electric shock or gas impact. Then, basic inspections (appearance inspection, action sound monitoring, resistance measurement), electrical performance testing, and function and airtightness testing can be carried out.

[0004] When detecting the pulse solenoid valve, it is necessary to detect the durability of the valve. The existing detection operation is just to continuously open and close the valve more than 100 times, and then observe whether the actions of the valve are consistent. However, during use, the water flow may impact the valve from multiple angles or in various ways, and thus this detection method is difficult to comprehensively test the pulse solenoid valve.

[0005] Based on this, the present invention discloses a pulse solenoid valve test bench and a detection method. Summary of the Invention

[0006] To solve the problem proposed in the background technique that when detecting the pulse solenoid valve, it is necessary to detect the durability of the valve. The existing detection operation is just to continuously open and close the valve more than 100 times, and then observe whether the actions of the valve are consistent. However, during use, the water flow may impact the valve from multiple angles or in various ways, and this detection method is difficult to comprehensively test the pulse solenoid valve, the present invention provides a pulse solenoid valve test bench and a detection method, which includes a water tank, and is characterized in that: a pulse solenoid valve body is arranged in the middle of the water tank, a support mechanism is arranged in the middle of the water tank, the support mechanism is used for cooperating with the pulse solenoid valve body for detection use, a flow disturbing mechanism is arranged in the middle of the side surface of the pulse solenoid valve body, and a flow guiding mechanism is arranged in the middle of the water tank;

[0007] As a further improvement of the technical solution, the flow disturbing mechanism includes a water inlet pipe, a diversion pipe, a sealing ring gasket, a groove, a baffle plate, an arc-shaped flow disturbing plate, a limiting plate, and a rotating assembly. The end of the pulse solenoid valve body is fixedly connected with a water inlet pipe. The end of the water inlet pipe is slidably connected with a diversion pipe. The end of the diversion pipe is fixedly connected with a sealing ring gasket. The sealing ring gasket is slidably connected with the water inlet pipe. A plurality of groups of grooves are formed inside the diversion pipe. A plurality of groups of baffle plates are fixedly connected to the ends of the grooves. An arc-shaped flow disturbing plate is slidably connected inside the baffle plate. A limiting plate is fixedly connected to the middle of the arc-shaped flow disturbing plate.

[0008] As a further improvement of the technical solution, the rotating assembly includes a support rod, a circular ring, a torsion, a pull rod, and a hinge ball. A plurality of groups of support rods are slidably connected inside the diversion pipe. A circular ring is fixedly connected to the ends of the plurality of groups of support rods. A torsion is rotatably connected to the middle of the circular ring. A pull rod is rotatably connected to the middle of the torsion. A hinge ball is fixedly connected to the end of the pull rod. The hinge ball is hinged to the limiting plate.

[0009] As a further improvement of the technical solution, the rotating assembly further includes a retaining rod and a connecting rod. A retaining rod is fixedly connected to the middle of the circular ring. A plurality of groups of connecting rods are fixedly connected to the middle of the circular ring. The ends of the connecting rods are clamped with the water inlet pipe.

[0010] As a further improvement of the technical solution, the diversion mechanism includes a ball filter, a water pump, and a water inlet pipe. A ball filter is fixedly connected to the middle of the inner side of the water tank. A water pump is fixedly connected to the side of the water tank. A water inlet pipe is fixedly connected to the middle of the water pump. The end of the water inlet pipe is slidably connected with the sealing ring gasket.

[0011] As a further improvement of the technical solution, the support mechanism includes a support rod, a protection disc, an electric push rod, and a circular groove support disc. A plurality of groups of support rods are fixedly connected to the middle of the water tank. A protection disc is fixedly connected to the ends of the support rods. A plurality of groups of electric push rods are fixedly connected to the middle of the protection disc. A circular groove support disc is fixedly connected to the end of the electric push rod. The circular groove support disc is slidably connected with the pulse solenoid valve body.

[0012] As a further improvement of the technical solution, a plurality of groups of sliding grooves are formed in the middle of the protection disc. A clamping groove is formed at the end of each of the plurality of groups of sliding grooves. A round rod is slidably connected to the middle of the clamping groove. A telescopic drain pipe is fixedly connected to the end of the round rod. The telescopic drain pipe is slidably connected with the bottom of the pulse solenoid valve body.

[0013] As a further improvement of the technical solution, a plurality of groups of drain grooves are formed at the bottom of the telescopic drain pipe.

[0014] As a further improvement of the technical solution, the detection method of the pulse solenoid valve is mainly applicable to the above-mentioned pulse solenoid valve test bench. The method mainly includes the following steps:

[0015] S1: First, select the pulse solenoid valve body to be tested, and then fix it in the middle position of the test bench. During placement, visual inspection can be carried out, and then the working sound can be monitored to determine whether the valve core is normally attracted.

[0016] S2: After fixing the pulse solenoid valve body, electrical performance tests can be carried out, such as insulation resistance test, withstand voltage performance test, and pulse signal verification, etc.

[0017] S3: Finally, function and airtightness tests can be carried out, and multiple repetitive tests can be carried out to reduce problems such as valve core jamming or reset spring fatigue.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this pulse solenoid valve test bench and detection method, water flow is introduced into the flow disturbing mechanism through the diversion mechanism, and then the water flow can be transformed into a spiral shape inside the flow disturbing mechanism and enter the inside of the pulse solenoid valve body. Furthermore, when opening and closing the valve inside the pulse solenoid valve body, the valve can be tested by changing the state of the water flow. When the flow disturbing component is not enabled, the water flow flowing into the inside of the pulse solenoid valve body can directly hit the valve inside the pulse solenoid valve body, and at the same time, the flow disturbing mechanism can be intermittently opened and closed. Therefore, when testing the pulse solenoid valve body, the changing state of the water flow during the test can be improved, and thus the test of the pulse solenoid valve body can be more comprehensive.

[0020] 2. In this pulse solenoid valve test bench and detection method, through the cooperation of the limiting plate and the baffle plate, the arc-shaped flow disturbing plate can be fixed to the diversion pipeline. Furthermore, when there is water flow passing through the inside of the diversion pipeline, the water flow inside the diversion pipeline can be rotated through the action of the arc-shaped flow disturbing plate. Therefore, when the water flow enters the inside of the pulse solenoid valve body, it becomes a spiral state, and thus when testing the pulse solenoid valve body, the valve inside it can be comprehensively impacted and detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is the partial cross-sectional view of the present invention;

[0023] Figure 3 is the structural schematic diagram of the diversion pipeline of the present invention;

[0024] Figure 4 is the internal cross-sectional view of the diversion pipeline of the present invention;

[0025] Figure 5 is the structural schematic diagram of the flow disturbing mechanism of the present invention;

[0026] Figure 6 for the present invention Figure 1 Enlarged schematic view of part A

[0027] The meanings of the various reference numerals in the figure are as follows:

[0028] 1. Water tank; 2. Support rod; 3. Protection disc; 4. Electric push rod; 5. Circular groove support disc; 6. Pulse solenoid valve body; 7. Water inlet pipe; 8. Diversion pipe; 9. Sealing gasket; 10. Groove; 11. Baffle; 12. Arc-shaped flow spoiler; 13. Limit plate; 14. Support rod; 15. Ring; 16. Rotary knob; 17. Pull rod; 18. Hinge ball; 19. Retaining rod; 20. Connecting rod; 21. Ball filter; 22. Water pump; 23. Water inlet pipe; 24. Round rod; 25. Slide groove; 26. Card slot; 27. Telescopic drain pipe; 28. Drainage tank. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] When detecting a pulse solenoid valve, it is necessary to detect the durability of the valve. The existing detection operation is only to continuously open and close the valve more than 100 times, and then observe whether the actions of the valve are consistent. However, during use, the water flow may impact the valve from multiple angles or in various ways. Therefore, this detection method is difficult to comprehensively test the pulse solenoid valve.

[0031] For this reason, the present invention provides a pulse solenoid valve test bench and detection method. Refer to Figure 1-5 as shown. It includes a water tank 1, and is characterized in that: a pulse solenoid valve body 6 is arranged in the middle of the water tank 1, a support mechanism is arranged in the middle of the water tank 1, the support mechanism is used for cooperating with the pulse solenoid valve body 6 for detection use, a flow spoiler mechanism is arranged in the middle of the side surface of the pulse solenoid valve body 6, and a diversion mechanism is arranged in the middle of the water tank 1.

[0032] When it is necessary to test the pulse solenoid valve body 6, it can be placed on the support assembly. Then, the water tank 1 introduces water flow into the flow disturbing mechanism through the diversion mechanism. Inside the flow disturbing mechanism, the water flow can be transformed into a spiral shape and enter the inside of the pulse solenoid valve body 6. Furthermore, when opening and closing the valve inside the pulse solenoid valve body 6, its test can be carried out by changing the state of the water flow. When the flow disturbing assembly is not enabled, the water flow flowing into the pulse solenoid valve body 6 can directly impact the valve inside the pulse solenoid valve body 6, and at the same time, the flow disturbing mechanism can be intermittently opened and closed. Therefore, when testing the pulse solenoid valve body 6, the changing state of the water flow during the test can be improved, and thus the test of the pulse solenoid valve body 6 can be more comprehensive.

[0033] Specifically, as shown in Figure 1-5 The flow disturbing mechanism includes a water inlet pipe 7, a diversion pipe 8, a sealing ring gasket 9, a groove 10, a baffle 11, an arc-shaped flow disturbing plate 12, a limiting plate 13, and a rotating assembly. The end of the pulse solenoid valve body 6 is fixedly connected with a water inlet pipe 7. The end of the water inlet pipe 7 is slidably connected with a diversion pipe 8. The end of the diversion pipe 8 is fixedly connected with a sealing ring gasket 9. The sealing ring gasket 9 is slidably connected with the water inlet pipe 7. Multiple groups of grooves 10 are opened inside the diversion pipe 8. Multiple groups of baffles 11 are fixedly connected to the ends of the grooves 10. An arc-shaped flow disturbing plate 12 is slidably connected inside the baffle 11. A limiting plate 13 is fixedly connected to the middle of the arc-shaped flow disturbing plate 12.

[0034] The rotating assembly includes a support rod 14, a ring 15, a torsion 16, a pull rod 17, and a hinge ball 18. Multiple groups of support rods 14 are slidably connected inside the diversion pipe 8. The ends of the multiple groups of the said support rods 14 are fixedly connected with a ring 15. A torsion 16 is rotatably connected to the middle of the ring 15. A pull rod 17 is rotatably connected to the middle of the torsion 16. The end of the pull rod 17 is fixedly connected with a hinge ball 18. The hinge ball 18 is hinged to the limiting plate 13.

[0035] The rotating assembly further includes a retaining rod 19 and a connecting rod 20. A retaining rod 19 is fixedly connected to the middle of the ring 15. Multiple groups of connecting rods 20 are fixedly connected to the middle of the ring 15. The ends of the connecting rods 20 are clamped with the water inlet pipe 7.

[0036] The diversion mechanism includes a ball filter 21, a water pump 22, and a water inlet pipe 23. The ball filter 21 is fixedly connected to the middle of the inner side of the water tank 1. The water pump 22 is fixedly connected to the side of the water tank 1. The water inlet pipe 23 is fixedly connected to the middle of the water pump 22. The end of the water inlet pipe 23 is slidably connected with the sealing ring gasket 9.

[0037] The support assembly includes a support rod 2, a protection disc 3, an electric push rod 4, and a circular groove support disc 5. Multiple groups of support rods 2 are fixedly connected to the middle of the water tank 1. The ends of the support rods 2 are fixedly connected with a protection disc 3. Multiple groups of electric push rods 4 are fixedly connected to the middle of the protection disc 3. The end of the electric push rod 4 is fixedly connected with a circular groove support disc 5. The circular groove support disc 5 is slidably connected with the pulse solenoid valve body 6.

[0038] When working, when it is necessary to make the water flow entering the inside of the pulse solenoid valve body 6 spiral, the arc-shaped spoiler 12 can be pulled by the rotating assembly. Then, the arc-shaped spoiler 12 can slide inside the groove 10. Then, through the cooperation of the limiting plate 13 and the baffle 11, the arc-shaped spoiler 12 can be fixed to the diversion pipeline 8. When there is water flowing through the inside of the diversion pipeline 8, the water flow inside the diversion pipeline 8 can be rotated through the action of the arc-shaped spoiler 12. When the water flow enters the pulse solenoid valve body 6, it becomes a spiral state. When testing the pulse solenoid valve body 6, the valve inside it can be comprehensively impacted and detected. When it is necessary to pull the arc-shaped spoiler 12 out of the groove 10, the ring 15 can be rotated in the middle of the diversion pipeline 8. At this time, multiple support rods 14 can support the ring 15. Then, under the pulling action of the pull rod 17, the arc-shaped spoiler 12 can slide inside the groove 10. At this time, the pull rod 17 can rotate in the middle of the torsion 16. Through the action of the hinge ball 18, when the pull rod 17 pulls the arc-shaped spoiler 12, the angle between the pull rod 17 and the arc-shaped spoiler 12 can be changed more conveniently. When the ring 15 is rotated in the reverse direction, the arc-shaped spoiler 12 can be pushed into the groove 10 under the action of the pull rod 17, so that the water flow passing through the inside of the diversion pipeline 8 becomes a direct current state. When it is necessary to rotate the ring 15, the ring 15 can be fixed to the water inlet pipeline 7 through the action of the ball filter 21. The fixing rod 19 can connect and fix multiple rings 15. At this time, the diversion pipeline 8 can be rotated, so that there is a relative rotation between the diversion pipeline 8 and the ring 15, and then the arc-shaped spoiler 12 can be pulled out of the groove 10. When it is necessary to make the water flowing through the inside of the diversion pipeline 8 spiral, it can be realized more quickly by rotating the diversion pipeline 8. When it is necessary to introduce water flow into the diversion pipeline 8, the water pump 22 can be started. Then, the water flow in the water tank 1 can be introduced into the pulse solenoid valve body 6 through the water inlet pipe 23. Through the action of the ball filter 21, the water in the water tank 1 can be filtered, and the situation that impurities in the water tank 1 enter the pulse solenoid valve body 6 and cause damage to it can be reduced. When it is necessary to test the pulse solenoid valve body 6, the pulse solenoid valve body 6 can be placed in the middle of the circular groove support plate 5. Then, through the action of the circular groove support plate 5, the pulse solenoid valve body 6 can be supported. At this time, multiple electric push rods 4 can be started to adjust the height of the placement position of the pulse solenoid valve body 6. The protection disc 3 can isolate and protect the pulse solenoid valve body 6 from the water tank 1 when testing the pulse solenoid valve body 6. Then, during the testing process, the situation that the pulse solenoid valve body 6 is damaged can be reduced.

[0039] Further, refer to Figure 1-6A plurality of sliding grooves 25 are provided in the middle of the shown protection disc 3, and clamping grooves 26 are provided at the ends of the plurality of sliding grooves 25. A round rod 24 is slidably connected to the middle of the clamping groove 26. The end of the round rod 24 is fixedly connected to a telescopic drain pipe 27, and the telescopic drain pipe 27 is slidably connected to the bottom of the pulse solenoid valve body 6.

[0040] A plurality of drain grooves 28 are provided at the bottom of the telescopic drain pipe 27.

[0041] During operation, after the water flow for testing the pulse solenoid valve body 6 passes through the inside of the pulse solenoid valve body 6, it can be discharged into the inside of the water tank 1 through the telescopic drain pipe 27. When it is necessary to install between the telescopic drain pipe 27 and the pulse solenoid valve body 6, the round rod 24 can be placed inside the sliding groove 25, and then after sliding upward, it is placed inside the clamping groove 26, so that the telescopic drain pipe 27 and the pulse solenoid valve body 6 can be connected and fixed. Furthermore, when testing the pulse solenoid valve body 6, the stability of the connection between the telescopic drain pipe 27 and the pulse solenoid valve body 6 can be improved. When using the telescopic drain pipe 27 to discharge the water flow in the middle of the pulse solenoid valve body 6 into the inside of the water tank 1, through the telescopic action of the telescopic drain pipe 27, the bottom of the telescopic drain pipe 27 can be brought into contact with the water tank 1, and then through the action of the drain grooves 28, the water flow inside the telescopic drain pipe 27 can be discharged from the side, so that when testing the pulse solenoid valve body 6, the situation of water splashing everywhere inside the water tank 1 can be reduced.

[0042] The detection method of this pulse solenoid valve is mainly applicable to the above-mentioned pulse solenoid valve test bench, and this method mainly includes the following steps:

[0043] S1: First, select the pulse solenoid valve body 6 to be detected, and then fix it at the middle position of the test bench. During placement, an appearance inspection can be carried out, and then the working sound can be listened to judge whether the valve core is normally attracted.

[0044] S2: After the pulse solenoid valve body 6 is fixed, electrical performance tests can be carried out, such as insulation resistance test, withstand voltage performance test, and pulse signal verification, etc.

[0045] S3: Finally, function and airtightness tests can be carried out, and multiple repeated tests can be carried out to reduce problems such as valve core jamming or reset spring fatigue.

[0046] In summary, it effectively solves the problem that when detecting a pulse solenoid valve, it is necessary to detect the durability of the valve. The existing detection operation is just to continuously open and close the valve more than 100 times, and then observe whether the actions of the valve are consistent. However, during use, the water flow may impact the valve from multiple angles or in various ways, and this detection method is difficult to comprehensively test the pulse solenoid valve.

[0047] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulse solenoid valve test bench, which includes a water tank (1), and is characterized in that: In the middle of the water tank (1), a pulse solenoid valve body (6) is provided. A support mechanism is provided in the middle of the water tank (1), and the support mechanism is used to cooperate with the pulse solenoid valve body (6) for detection use. A flow disturbing mechanism is provided in the middle of the side of the pulse solenoid valve body (6), and a flow guiding mechanism is provided in the middle of the water tank (1).

2. The pulse solenoid valve test bench according to claim 1, characterized in that: The flow disturbing mechanism includes a water inlet pipe (7), a flow guiding pipe (8), a sealing ring gasket (9), a groove (10), a baffle (11), an arc-shaped flow disturbing plate (12), a limiting plate (13), and a rotating assembly. The end of the pulse solenoid valve body (6) is fixedly connected with a water inlet pipe (7). The end of the water inlet pipe (7) is slidably connected with a flow guiding pipe (8). The end of the flow guiding pipe (8) is fixedly connected with a sealing ring gasket (9). The sealing ring gasket (9) is slidably connected with the water inlet pipe (7). A plurality of groups of grooves (10) are formed inside the flow guiding pipe (8). A plurality of groups of baffles (11) are fixedly connected to the ends of the grooves (10). An arc-shaped flow disturbing plate (12) is slidably connected inside the baffle (11). A limiting plate (13) is fixedly connected to the middle of the arc-shaped flow disturbing plate (12).

3. The pulse solenoid valve test bench according to claim 2, characterized in that: The rotating assembly includes a support rod (14), a ring (15), a turning knob (16), a pull rod (17), and a hinge ball (18). A plurality of groups of support rods (14) are slidably connected inside the flow guiding pipe (8). The ends of the plurality of groups of support rods (14) are fixedly connected with a ring (15). The middle of the ring (15) is rotatably connected with a turning knob (16). The middle of the turning knob (16) is rotatably connected with a pull rod (17). The end of the pull rod (17) is fixedly connected with a hinge ball (18). The hinge ball (18) is hinged with the limiting plate (13).

4. The pulse solenoid valve test bench according to claim 3, characterized in that: The rotating assembly further includes a retaining rod (19) and a connecting rod (20). A retaining rod (19) is fixedly connected to the middle of the ring (15). A plurality of groups of connecting rods (20) are fixedly connected to the middle of the ring (15). The ends of the connecting rods (20) are clamped with the water inlet pipe (7).

5. The pulse solenoid valve test bench according to claim 2, wherein: The flow guiding mechanism includes a ball filter (21), a water pump (22), and a water inlet pipe (23). The ball filter (21) is fixedly connected to the middle of the inner side of the water tank (1). The water pump (22) is fixedly connected to the side of the water tank (1). The middle of the water pump (22) is fixedly connected with a water inlet pipe (23). The end of the water inlet pipe (23) is slidably connected with the sealing ring gasket (9).

6. The pulse solenoid valve test bench according to claim 1, characterized in that: The support mechanism includes a support rod (2), a protection disc (3), an electric push rod (4), and a round groove support disc (5). A plurality of groups of support rods (2) are fixedly connected to the middle of the water tank (1). The ends of the support rods (2) are fixedly connected with a protection disc (3). A plurality of groups of electric push rods (4) are fixedly connected to the middle of the protection disc (3). The end of the electric push rod (4) is fixedly connected with a round groove support disc (5). The round groove support disc (5) is slidably connected with the pulse solenoid valve body (6).

7. A pulse solenoid valve test bench according to claim 6, characterized in that: A plurality of sliding grooves (25) are formed in the middle of the protection disc (3), and clamping grooves (26) are formed at the ends of the plurality of sliding grooves (25). A round rod (24) is slidably connected to the middle of the clamping groove (26). A telescopic drain pipe (27) is fixedly connected to the end of the round rod (24), and the telescopic drain pipe (27) is slidably connected to the bottom of the pulse solenoid valve body (6).

8. A pulse solenoid valve test bench according to claim 7, characterized in that: A plurality of drain grooves (28) are formed at the bottom of the telescopic drain pipe (27).

9. A detection method for a pulse solenoid valve, characterized in that: The detection method of the pulse solenoid valve is mainly applicable to a pulse solenoid valve test bench described in claims 1-8. The method mainly includes the following steps: S1: First, select the pulse solenoid valve body (6) to be detected, and then fix it in the middle position of the test bench. During placement, visual inspection can be carried out, and then the working sound can be monitored to judge whether the valve core is normally attracted; S2: After the pulse solenoid valve body (6) is fixed, electrical performance tests can be carried out, such as insulation resistance test, withstand voltage performance test, and pulse signal verification, etc.; S3: Finally, function and airtightness tests can be carried out, and repeated tests can be carried out multiple times to reduce problems such as valve core jamming or fatigue of the return spring.

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