Electromagnetic valve exhaust and air tightness detection device and detection method

Abstract

The invention relates to the technical field of electromagnetic valve detection devices, and discloses an electromagnetic valve exhaust and air tightness detection device and method, the electromagnetic valve exhaust and air tightness detection device comprises a detection table and an electromagnetic valve arranged at the top of the detection table, the top of the detection table is provided with a display screen, and the electromagnetic valve exhaust and air tightness detection device further comprises a connecting part arranged on the electromagnetic valve; the number of the exhaust parts is two, and the two exhaust parts are both arranged on the back face of the electromagnetic valve; the number of the fixing parts is two, and the two fixing parts are both arranged at the top of the detection table; the connecting part comprises a connecting assembly, and the connecting assembly is installed on the back face of the electromagnetic valve. Through the arrangement of the connecting part, the problems that in the detection and connection process of the electromagnetic valve, the connection mode is complex, so that detection and connection are difficult to complete rapidly, the detection efficiency is reduced, the situations of untight sealing and the like caused by tedious operation are easily caused, and then the detection result is influenced are solved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic valve testing devices, specifically to a device and method for testing the exhaust and airtightness of electromagnetic valves. Background Technology

[0002] An electromagnetic valve exhaust and airtightness testing device is an automated testing equipment designed specifically for verifying the core performance of electromagnetic valves. By integrating functional modules such as air path control, pressure sensing, and flow monitoring, it can accurately and quantitatively detect the exhaust flow, response speed, and sealing performance of electromagnetic valves. Its working principle is to introduce dry gas at a set pressure into the electromagnetic valve cavity, and use high-precision sensors to collect key parameters such as gas leakage and pressure holding value in real time. Combined with preset standards, it automatically determines the product's qualification status.

[0003] However, the existing solenoid valve exhaust and airtightness testing devices have a complicated connection method during the solenoid valve testing connection process, which makes it difficult to complete the testing connection quickly. This not only reduces the testing efficiency, but also easily leads to problems such as poor sealing due to cumbersome operation, thus affecting the test results. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for detecting the exhaust and airtightness of a solenoid valve. By setting up a connecting part, the invention solves the problem that the connection method is complicated during the detection connection process of the solenoid valve, which makes it difficult to complete the detection connection quickly. This not only reduces the detection efficiency, but also easily leads to poor sealing due to cumbersome operation, thus affecting the detection results.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a solenoid valve venting and airtightness testing device, comprising a testing platform and a solenoid valve disposed on the top of the testing platform. The top of the testing platform is provided with a display screen. The device also includes: a connecting part disposed on the solenoid valve; two venting parts disposed on the back of the solenoid valve; and two fixing parts disposed on the top of the testing platform. The connecting part includes a connecting assembly installed on the back of the solenoid valve; a sealing assembly installed on the front of the solenoid valve; the connecting assembly includes a vent pipe fixedly connected to the back of the solenoid valve, the outer wall of the vent pipe having a threaded opening, a nut being threaded onto the threaded opening, a sealing ring being fixedly connected to the inner wall of the nut, the front end of the sealing ring extending into the vent pipe, an air supply pipe being rotatably connected to the back of the nut, a pressure sensor being provided on the outer wall of the air supply pipe, an inflation device being fixedly connected to the bottom of the detection platform, and the end of the air supply pipe being fixedly connected to the inflation device.

[0006] Furthermore, the exhaust section includes an exhaust assembly disposed on the back of the solenoid valve; and a detection assembly mounted on the exhaust assembly.

[0007] Furthermore, the fixing part includes a fixing component disposed on the top of the testing table; and a limiting component mounted on the fixing component.

[0008] Furthermore, the sealing assembly includes two air supply pipes fixedly connected to the front of the solenoid valve. The outer walls of the two air supply pipes are provided with threaded openings, and nuts are threaded onto the two threaded openings. Sealing rings are fixedly connected to the inner walls of the two nuts. The rear ends of the two sealing rings extend into the two air supply pipes. Sealing tubes are rotatably connected to the front of the two nuts, and the sealing tubes communicate with the two nuts.

[0009] Furthermore, the exhaust assembly includes an exhaust pipe fixedly connected to the back of the solenoid valve. The outer wall of the exhaust pipe has a threaded opening three. A nut three is threadedly connected to the threaded opening three. A detection tube is rotatably connected to the back of the nut three, and the detection tube communicates with the nut three.

[0010] Furthermore, the detection assembly includes a valve disposed on a detection tube, and a flow sensor is disposed on the detection tube.

[0011] Furthermore, the fixing assembly includes a rectangular plate fixedly connected to the top of the testing platform, two slide rods slidably connected to the rectangular plate, a fixing plate fixedly connected to the left end of the two slide rods, the fixing plate being in contact with the solenoid valve, and springs wound around the outer walls of the two slide rods, one end of each spring being fixedly connected to the rectangular plate, and the other end of each spring being fixedly connected to the fixing plate.

[0012] Furthermore, the limiting component includes a screw fixedly connected to the right side of the fixed plate. The screw passes through the rectangular plate and is slidably connected to the rectangular plate. The outer wall of the screw is threaded with an anti-loosening nut and a limiting nut. The side of the anti-loosening nut and the limiting nut that are close to each other is in contact with the rectangular plate.

[0013] The present invention has the following beneficial effects: 1. By setting a connecting part, after the solenoid valve is fixed, the first nut of the air supply pipe is threaded to the first threaded port of the air supply pipe, ensuring that the first sealing ring inside the first nut is embedded inside the air supply pipe to ensure a seal. After the air supply pipe and the air supply pipe are connected in place, the two second nuts are threaded to the second threaded port of the air supply pipe on the front of the solenoid valve, respectively. Note that the second sealing ring inside the second nut should match the air supply pipe interface. This connection structure can simplify the connection process of solenoid valve exhaust and air tightness testing, and improve testing efficiency. 2. This invention, by setting up an exhaust section, allows for the testing of the exhaust performance of a solenoid valve. When the inflation device is activated, air is continuously supplied to the solenoid valve through the air supply pipe. Subsequently, an energizing signal is sent to the solenoid valve to drive the valve core to move, causing one exhaust pipe to close and the other to open. The gas is discharged from the open exhaust pipe through the sealing pipe. During the exhaust process, the flow sensor on the exhaust pipe collects instantaneous flow data in real time. If the exhaust time is less than a preset threshold, the exhaust performance is deemed unqualified; otherwise, it is qualified. 3. By setting up a fixing part, when testing the solenoid valve, it is first placed on the testing table. Then, the limiting nut of the screw is rotated outward to release the limiting. At this time, the screw will be driven by the sliding rod guide and the spring return thrust to move the fixing plate closer to and fit the solenoid valve. Then, the anti-loosening nut is rotated outward and cooperates with the rectangular plate to lock the screw, preventing the fixing plate from loosening and achieving reliable limiting on one side of the solenoid valve. At the same time, the same fixing mechanism is provided on the other side of the solenoid valve. The above steps can be repeated to complete the bidirectional clamping. This structure can quickly achieve the positioning and stable fixing of the solenoid valve, providing a stable guarantee for subsequent testing.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the connecting part of the present invention; Figure 3 This is a partial cross-sectional view of the exhaust section of the present invention; Figure 4 This is a partial structural schematic diagram of the sealing assembly of the present invention; Figure 5 This is a partial cross-sectional view of the fixing part of the present invention; Figure 6 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 7 For the present invention Figure 3 A magnified structural diagram of B in the diagram; Figure 8 For the present invention Figure 4 A magnified structural diagram of C; Figure 9For the present invention Figure 5 A magnified structural diagram of D in the diagram.

[0017] The attached diagram lists the components represented by each number as follows: In the diagram: 111, Testing platform; 112, Solenoid valve; 113, Display screen; 2, Connecting part; 21, Connecting assembly; 211, Vent pipe; 212, Threaded port one; 213, Nut one; 214, Sealing ring one; 215, Air supply pipe; 216, Pressure sensor; 217, Inflation device; 22, Sealing assembly; 221, Air supply pipe; 222, Threaded port two; 223, Nut two; 224, Sealing ring two; 225, Seal. 3. Exhaust section; 31. Exhaust assembly; 311. Exhaust pipe; 312. Threaded port three; 313. Nut three; 314. Detection pipe; 32. Detection assembly; 321. Valve; 322. Flow sensor; 4. Fixing part; 41. Fixing assembly; 411. Rectangular plate; 412. Slide rod; 413. Fixing plate; 414. Spring; 42. Limiting assembly; 421. Screw; 422. Anti-loosening nut; 423. Limiting nut. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-9 As shown, the present invention is a testing device for testing the venting and airtightness of a solenoid valve, including a testing platform 111 and a solenoid valve 112 disposed on the top of the testing platform 111. A display screen 113 is disposed on the top of the testing platform 111. The device also includes: a connecting part 2 disposed on the solenoid valve 112; two venting parts 3 disposed on the back of the solenoid valve 112; and two fixing parts 4 disposed on the top of the testing platform 111. The connecting part 2 includes a connecting assembly 21, which is installed on the back of the solenoid valve 112; and a sealing assembly 22, which is installed on the front of the solenoid valve 112. The connecting assembly 21 includes a vent pipe 211 fixedly connected to the back of the solenoid valve 112. The outer wall of the vent pipe 211 has a threaded opening 212, and a nut 213 is threaded onto the threaded opening 212. A sealing ring 214 is fixedly connected to the inner wall of the nut 213, and the front end of the sealing ring 214 extends to the vent pipe 21. Inside, a gas supply pipe 215 is rotatably connected to the back of nut 213. A pressure sensor 216 is installed on the outer wall of the gas supply pipe 215. An inflation device 217 is fixedly connected to the bottom of the detection platform 111. The end of the gas supply pipe 215 is fixedly connected to the inflation device 217. The sealing assembly 22 includes two gas supply pipes 221 fixedly connected to the front of the solenoid valve 112. The outer wall of each of the two gas supply pipes 221 has a threaded opening 222. Nuts 223 are threaded onto each of the two threaded openings 222. Each of the two nuts 223 has a sealing ring 224 fixedly connected to its inner wall. The rear ends of the two sealing rings 224 extend into the two air supply pipes 221. The front of each nut 223 is rotatably connected to a sealing tube 225, which communicates with both nuts 223. By setting the connecting part 2, after the solenoid valve 112 is fixed, the nut 213 on the air supply pipe 215 can be threaded to the threaded opening 212 on the outer wall of the air pipe 211. During connection, it is necessary to ensure that the nut 213 is sealed. The sealing ring 214 is inserted into the vent pipe 211 to ensure the sealing performance of the connection. After the air supply pipe 215 is connected to the vent pipe 211, the two nuts 223 are then threaded to the threaded openings 222 on the outer wall of the two air supply pipes 221 on the front of the solenoid valve 112. When connecting, it is also necessary to ensure that the sealing ring 224 inside the nut 223 matches the interface of the air supply pipe 221. This setting can reduce the cumbersome connection process of solenoid valve venting and airtightness testing, thereby improving its testing efficiency.

[0020] The exhaust section 3 includes an exhaust assembly 31, which is disposed on the back of the solenoid valve 112; and a detection assembly 32, which is mounted on the exhaust assembly 31. The exhaust assembly 31 includes an exhaust pipe 311 fixedly connected to the back of the solenoid valve 112. The outer wall of the exhaust pipe 311 has a threaded opening 312, and a nut 313 is threadedly connected to the threaded opening 312. A detection tube 314 is rotatably connected to the back of the nut 313 and communicates with the nut 313. The detection assembly 32 includes a valve 321 disposed on the detection tube 314, and a flow sensor 322 disposed on the detection tube 314. By setting the exhaust section 3, if it is necessary to test the exhaust performance of the solenoid valve 112, the inflation can be restarted. The device 217 continuously supplies gas to the solenoid valve 112 via the gas supply pipe 215, and then sends an energizing signal to the solenoid valve under test to drive the valve core to move, controlling the closure of one exhaust pipe 311 and the opening of the other exhaust pipe 311. The gas flows into the opened exhaust pipe 311 through the sealing pipe 225 and is discharged outward. During the exhaust process, the flow sensor 322 on the exhaust pipe 311 will collect instantaneous flow data in real time. If the exhaust time is less than a preset threshold, it means that the exhaust performance of the solenoid valve is unqualified; otherwise, the exhaust performance is qualified. Through the above series of settings, the standardized operation of solenoid valve fixing, airtightness testing and exhaust performance testing can be realized, which simplifies the testing process, improves testing efficiency, and ensures the accuracy and reliability of the test results.

[0021] The fixing part 4 includes a fixing assembly 41, which is disposed on the top of the detection table 111; and a limiting assembly 42, which is mounted on the fixing assembly 41. The fixing assembly 41 includes a rectangular plate 411 fixedly connected to the top of the detection table 111. Two slide rods 412 are slidably connected to the rectangular plate 411. A fixing plate 413 is fixedly connected to the left end of the two slide rods 412. The fixing plate 413 is in contact with the solenoid valve 112. Springs 41 are wound around the outer walls of the two slide rods 412. 4. One end of each of the two springs 414 is fixedly connected to the rectangular plate 411, and the other end of each of the two springs 414 is fixedly connected to the fixed plate 413. The limiting assembly 42 includes a screw 421 fixedly connected to the right side of the fixed plate 413. The screw 421 passes through the rectangular plate 411 and is slidably connected to the rectangular plate 411. The outer wall of the screw 421 is threaded with an anti-loosening nut 422 and a limiting nut 423. The side of the anti-loosening nut 422 and the limiting nut 423 that are close to each other is connected to the rectangular plate 411. By setting a fixing part 4, when using the solenoid valve 112 for testing, it can be placed on the testing platform 111. After placement, the limiting nut 423 on the outer wall of the screw 421 can be rotated outward to release the limiting constraint on the screw 421. At this time, the screw 421 will be guided by the two sliding rods 412 and the reset thrust of the outer wall spring 414, driving the fixing plate 413 to move closer to the solenoid valve 112 until the fixing plate 413 is in contact with the solenoid valve 112. Then, the anti-loosening nut 422 on the outer wall of the screw 421 can be rotated outward to lock the screw 421 in cooperation with the rectangular plate 411, preventing it from accidentally shifting and causing the fixing plate 413 to loosen. This achieves reliable limiting on one side of the solenoid valve 112. At the same time, the same fixing mechanism is provided on the other side of the solenoid valve 112. The above steps can be repeated to complete the bidirectional clamping. Through this setting, the positioning and stable fixing of the solenoid valve can be quickly achieved, providing a stable foundation for subsequent testing.

[0022] Test method: S1: Start the inflation device and enter the airtightness pressure test state. After the connection is completed, start the inflation device 217. The inflation device 217 fills the solenoid valve 112 with high-pressure gas through the gas supply pipe 215. When the pressure sensor 216 detects that the gas pressure in the gas supply pipe 215 has reached the preset test pressure, the inflation device 217 is closed, so that the solenoid valve 112 officially enters the airtightness pressure test state.

[0023] S2: Perform an airtightness test and determine the result. While the solenoid valve 112 is in the pressure measurement state, the pressure sensor 216 will intermittently collect the pressure data in the gas supply pipe 215. If the detected pressure value is lower than the set test pressure, the solenoid valve 112 is deemed to have failed the airtightness test. Conversely, if the pressure value is maintained at or above the set test pressure, the solenoid valve 112 is deemed to have passed the airtightness test. This step can avoid detection errors caused by poor sealing and ensure the accuracy of the airtightness test results.

[0024] S3: Perform exhaust performance testing and determine the results. If further exhaust performance testing of solenoid valve 112 is required, the inflation device 217 is restarted, and air is continuously supplied to solenoid valve 112 through air supply pipe 215. Then, an energizing signal is sent to the solenoid valve under test to drive the valve core to move, controlling one exhaust pipe 311 to close and the other exhaust pipe 311 to open. The gas flows into the open exhaust pipe 311 through sealing pipe 225 and is discharged outward. During the exhaust process, the flow sensor 322 on the exhaust pipe 311 collects instantaneous flow data in real time. If the exhaust time is less than the preset threshold, the exhaust performance of the solenoid valve is deemed unqualified. Conversely, if the exhaust time reaches or exceeds the preset threshold, the exhaust performance of the solenoid valve is deemed qualified. This ultimately achieves standardized operation of solenoid valve fixing, airtightness testing, and exhaust performance testing, while ensuring the reliability of the test results.

[0025] Pressure sensor 216: This is a specialized sensing device adapted for solenoid valve airtightness testing. It determines whether the solenoid valve is leaking by sensing pressure changes in the pipeline or cavity during the test. It usually has fast response, high accuracy and anti-interference characteristics. It is often available in piezoresistive and capacitive types to adapt to different testing needs. It is widely used in the automotive, electronics and other fields for testing the sealing performance of solenoid valves. A common model of this type of sensor is SensorsONE's DMP331i, which has a measurement range of 0-20 bar, is installed via G1 / 2 external thread, outputs a 4-20mA signal through an M12 interface, and has a built-in 16-bit analog-to-digital converter to ensure test resolution.

[0026] Flow sensor 322: This is a dedicated sensing device adapted for solenoid valve exhaust detection. It captures changes in gas flow rate in real time during exhaust using principles such as thermal and calorimetric methods, converting the flow signal into a readable electrical signal. This allows it to determine whether the solenoid valve exhaust is smooth and whether there are any abnormal leaks. It features high sensitivity and adaptability to various gas media, and is widely used in industrial pneumatic systems for testing the exhaust performance of solenoid valves. A common model of this type of sensor is the Emerson AVENTICS AF2 series 8652AV004JA0000, which uses calorimetric measurement, has a maximum rated flow rate of 1060 l / min, supports IO-Link communication and multiple signal outputs, and can monitor exhaust flow, pressure and temperature, enabling rapid intervention in solenoid valve exhaust leakage problems.

[0027] It should be noted that the control of the solenoid valve 112, pressure sensor 216 and flow sensor 322 in this application can all be achieved by using a program set in the control panel and inputting relevant parameters as needed for automated control. This control method can be set using existing technologies, such as PLC.

[0028] When using the solenoid valve 112, it can be placed on the testing platform 111. After placement, the limiting nut 423 on the outer wall of the screw 421 can be rotated outward to release the limiting constraint on the screw 421. At this time, under the guiding action of the two sliding rods 412 and the reset thrust of the outer wall spring 414, the screw 421 will drive the fixing plate 413 to move closer to the solenoid valve 112 until the fixing plate 413 is in contact with the solenoid valve 112. Then, the anti-loosening nut 422 on the outer wall of the screw 421 can be rotated outward to lock it with the rectangular plate 411. The fixed screw 421 prevents accidental displacement that could loosen the fixing plate 413, thus ensuring reliable limiting on one side of the solenoid valve 112. Simultaneously, a similar fixing mechanism is provided on the other side of the solenoid valve 112. Repeating the above steps completes bidirectional clamping. This design allows for quick and stable positioning and fixing of the solenoid valve, providing a stable foundation for subsequent testing. After the solenoid valve 112 is fixed, the nut 213 on the gas supply pipe 215 can be threaded into the threaded opening 212 on the outer wall of the vent pipe 211. During connection, ensure that the nut 213... The sealing ring 214 inside the valve 13 is inserted into the vent pipe 211 to ensure the sealing performance of the connection. After the air supply pipe 215 is connected to the vent pipe 211, the two nuts 223 are then threaded onto the threaded openings 222 on the outer wall of the two air supply pipes 221 on the front of the solenoid valve 112. During connection, it is also necessary to ensure that the sealing ring 224 inside the nut 223 matches the interface of the air supply pipe 221. This setting can reduce the cumbersome connection process of solenoid valve venting and airtightness testing, thereby improving its testing efficiency. After matching, start the inflation device 21. 7. High-pressure gas is injected into the solenoid valve 112 through the gas supply pipe 215. When the pressure sensor 216 detects that the gas pressure in the gas supply pipe 215 reaches the preset test pressure, the gas filling device 217 can be closed, so that the solenoid valve 112 enters the pressure measurement state. During this period, the pressure sensor 216 will intermittently collect pressure data. If the detected pressure value is lower than the set test pressure, it means that the air tightness test of the solenoid valve 112 is unqualified. Otherwise, the air tightness test is qualified. Through this setting, the air tightness test of the solenoid valve can be completed, avoiding the test error caused by poor sealing.If the exhaust performance of solenoid valve 112 needs to be tested, the inflation device 217 can be activated again to continuously supply air to solenoid valve 112 through the air supply pipe 215. Then, an energizing signal is sent to the solenoid valve under test, driving the valve core to actuate and controlling one exhaust pipe 311 to close while the other exhaust pipe 311 opens. Gas flows into the open exhaust pipe 311 through the sealing pipe 225 and is discharged outwards. During the exhaust process, the flow sensor 322 on the exhaust pipe 311 collects instantaneous flow data in real time. If the exhaust time is less than a preset threshold, the solenoid valve's exhaust performance is unqualified; otherwise, the exhaust performance is qualified. Through the above series of settings, standardized operations for solenoid valve fixing, airtightness testing, and exhaust performance testing can be achieved, simplifying the testing process, improving testing efficiency, and ensuring the accuracy and reliability of the test results.

[0029] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A solenoid valve exhaust and airtightness testing device, comprising a testing platform (111) and a solenoid valve (112) disposed on the top of the testing platform (111), wherein a display screen (113) is disposed on the top of the testing platform (111), characterized in that, Also includes: A connecting part (2) is provided on the solenoid valve (112); There are two exhaust sections (3), and both exhaust sections (3) are located on the back of the solenoid valve (112); Fixing part (4), two fixing parts (4) are provided, and both fixing parts (4) are provided on the top of the detection table (111); The connection part (2) includes a connection assembly (21) mounted on the back of the solenoid valve (112); and A sealing assembly (22) is mounted on the front of the solenoid valve (112); The connecting assembly (21) includes a vent pipe (211) fixedly connected to the back of the solenoid valve (112). The outer wall of the vent pipe (211) has a threaded opening (212). A nut (213) is threaded onto the threaded opening (212). A sealing ring (214) is fixedly connected to the inner wall of the nut (213). The front end of the sealing ring (214) extends into the vent pipe (211). An air supply pipe (215) is rotatably connected to the back of the nut (213). A pressure sensor (216) is provided on the outer wall of the air supply pipe (215). An inflation device (217) is fixedly connected to the bottom of the detection platform (111). The end of the gas supply pipe (215) is fixedly connected to the gas filling device (217).

2. The solenoid valve exhaust and airtightness detection device according to claim 1, characterized in that: The exhaust section (3) includes an exhaust assembly (31) disposed on the back of the solenoid valve (112); and A detection component (32) is mounted on an exhaust assembly (31).

3. The solenoid valve exhaust and airtightness detection device according to claim 2, characterized in that: The fixing part (4) includes a fixing component (41) disposed on the top of the testing table (111); and A limiting component (42) is mounted on a fixing component (41).

4. The solenoid valve exhaust and airtightness detection device according to claim 3, characterized in that: The sealing assembly (22) includes two air supply pipes (221) fixedly connected to the front of the solenoid valve (112). The outer walls of the two air supply pipes (221) are provided with threaded openings (222). Nuts (223) are threadedly connected to the two threaded openings (222). Sealing rings (224) are fixedly connected to the inner walls of the two nuts (223). The rear ends of the two sealing rings (224) extend into the two air supply pipes (221). Sealing pipes (225) are rotatably connected to the front of the two nuts (223). The sealing tube (225) is connected to both nuts (223).

5. The solenoid valve exhaust and airtightness detection device according to claim 4, characterized in that: The exhaust assembly (31) includes an exhaust pipe (311) fixedly connected to the back of the solenoid valve (112). The outer wall of the exhaust pipe (311) is provided with a threaded opening (312). A nut (313) is threadedly connected to the threaded opening (312). A detection tube (314) is rotatably connected to the back of the nut (313). Among them, the detection tube (314) is connected to the nut three (313).

6. The solenoid valve exhaust and airtightness detection device according to claim 5, characterized in that: The detection assembly (32) includes a valve (321) disposed on a detection tube (314), and a flow sensor (322) is disposed on the detection tube (314).

7. The solenoid valve exhaust and airtightness detection device according to claim 6, characterized in that: The fixing assembly (41) includes a rectangular plate (411) fixedly connected to the top of the detection table (111). Two slide rods (412) are slidably connected on the rectangular plate (411). A fixing plate (413) is fixedly connected to the left end of the two slide rods (412). The fixing plate (413) is in contact with the solenoid valve (112). Springs (414) are wound around the outer walls of the two slide rods (412). One end of each of the two springs (414) is fixedly connected to the rectangular plate (411), and the other end of each of the two springs (414) is fixedly connected to the fixed plate (413).

8. The solenoid valve exhaust and airtightness detection device according to claim 7, characterized in that: The limiting component (42) includes a screw (421) fixedly connected to the right side of the fixing plate (413). The screw (421) passes through the rectangular plate (411) and is slidably connected to the rectangular plate (411). The outer wall of the screw (421) is threaded with an anti-loosening nut (422) and a limiting nut (423). Among them, the side of the anti-loosening nut (422) and the limiting nut (423) that are close to each other is in contact with the rectangular plate (411).

9. A detection method for a solenoid valve exhaust and airtightness detection device, applicable to the solenoid valve exhaust and airtightness detection device as described in claim 8, characterized in that, Includes the following steps: S1: Start the inflation device and enter the airtightness pressure test state. After the connection is completed, start the inflation device (217). The inflation device (217) fills the solenoid valve (112) with high-pressure gas through the gas supply pipe (215). When the pressure sensor (216) detects that the gas pressure in the gas supply pipe (215) reaches the preset test pressure, close the inflation device (217) so that the solenoid valve (112) officially enters the airtightness test state. S2: Perform an airtightness test and determine the result. During the pressure measurement period of the solenoid valve (112), the pressure sensor (216) will intermittently collect the pressure data in the gas supply pipe (215). If the detected pressure value is lower than the set test pressure, the solenoid valve (112) is deemed to have failed the air tightness test. Conversely, if the pressure value is maintained at or above the set test pressure, the solenoid valve (112) is deemed to have passed the air tightness test. This step can avoid detection errors caused by poor sealing and ensure the accuracy of the air tightness test results. S3: Perform exhaust performance testing and determine the results. If further exhaust performance testing of the solenoid valve (112) is required, the inflation device (217) is restarted, and gas is continuously supplied to the solenoid valve (112) through the gas supply pipe (215). Then, an energizing signal is sent to the solenoid valve to be tested, driving the valve core to move, controlling the closure of one exhaust pipe (311) and the opening of the other exhaust pipe (311). The gas flows into the opened exhaust pipe (311) through the sealing pipe (225) and is discharged outward. During the exhaust process, the flow sensor (322) on the exhaust pipe (311) collects instantaneous flow data in real time. If the exhaust time is less than the preset threshold, the exhaust performance of the solenoid valve is deemed unqualified. Conversely, if the exhaust time reaches or exceeds the preset threshold, the exhaust performance of the solenoid valve is deemed qualified. In the end, the standardized operation of solenoid valve fixing, airtightness testing and exhaust performance testing is realized, while ensuring the reliability of the test results.

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