A bellows airtightness rapid detection device and detection method

Abstract

The application discloses a kind of bellows airtightness rapid detection device and detection method, belong to bellows detection technical field, including detection mechanism, detection mechanism includes: fixed component, sealing assembly and leak detection component.Fixed component includes detection tool, and detection tool includes base;Sealing assembly includes sealing cover plate and sealing drive part;Leak detection component includes air nozzle, leak detection drive part, gas tank and differential pressure leak detector, gas tank and air nozzle are communicated at gas outlet end, and the drive end of leak detection drive part is connected with air nozzle, and the detection end of differential pressure leak detector is located in the detection cavity outside bellows;The application is realized to the automatic fixing of bellows by the cooperation of detection tool, sealing assembly and leak detection component, while realizing the integrated detection of pressure resistance and airtightness, degree of automation is high, manual intervention is less, reduce the labor intensity of worker, improve the work efficiency of bellows airtightness detection.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe testing technology, and in particular to a rapid testing device and method for the airtightness of corrugated pipes. Background Technology

[0002] Metal bellows are widely used in automotive instruments and meters, mainly as measuring elements in pressure measuring instruments. During the production process, the airtightness of metal bellows needs to be tested.

[0003] The publication number CN109211481A provides a leak detection device for welded bellows, which includes an upper fixed plate, a lower fixed plate, a connecting rod mechanism and a clamping mechanism. The upper fixed plate is provided with multiple upper annular sealing rings and the lower fixed plate is provided with multiple lower annular sealing rings. Each upper annular sealing ring and each lower annular sealing ring can be connected to a bellows flange of a certain specification, thereby fixing the bellows for leak detection.

[0004] In the existing technology for testing the airtightness of metal bellows, most steps in the testing process require repeated manual operation, which results in high labor intensity for workers and low testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and to propose a rapid testing device and method for the airtightness of corrugated pipes, thereby solving the technical problems of high labor intensity and low testing efficiency in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a rapid testing device and method for the airtightness of corrugated pipes, including a testing mechanism comprising:

[0007] The fixing component includes a testing fixture, which includes a base. The interior of the base forms a testing cavity for placing the bellows, and the top of the base has a feeding trough for placing the bellows.

[0008] A sealing assembly, comprising a sealing cover and a sealing drive, wherein the sealing cover is disposed on one side of the base and is slidably inserted into the base, and the sealing drive is connected to the sealing cover to drive the sealing cover to press against the base to seal the detection chamber.

[0009] The leak detection assembly includes an air nozzle, a leak detection drive unit, an air tank, and a differential pressure leak detector. The air nozzle is located below the detection fixture, and its outlet pipe passes through the base and can communicate with the interior of the bellows. The outlet end of the air tank is connected to the air nozzle to inflate the bellows. The drive end of the leak detection drive unit is connected to the air nozzle to drive the bellows upward to abut against the sealing cover plate to seal the bellows. The detection end of the differential pressure leak detector is located in the detection chamber outside the bellows to determine the airtightness of the bellows by identifying changes in the pressure value inside the detection chamber.

[0010] In some embodiments, the testing fixture further includes a positioning sleeve, which is slidably connected to the base. The upper end of the positioning sleeve has a testing groove arranged in a stepped manner, and the lower end of the positioning sleeve has a through hole for inserting an air outlet pipe into the corrugated pipe.

[0011] In some embodiments, one end of the air nozzle passes through the base and abuts against the positioning sleeve, and can drive the positioning sleeve to slide on the base under the drive of the leak detection drive, so as to drive the bellows to abut against the sealing cover plate through the positioning sleeve.

[0012] In some embodiments, the sealing drive includes a top cylinder and a pull rod, the pull rod being connected to a sealing cover plate, the top cylinder being connected to the pull rod to drive the sealing cover plate to slide into the base, and the leak detection drive includes a bottom cylinder, the bottom cylinder being connected to an air nozzle.

[0013] In some embodiments, the testing fixture is provided in two sets, and there are two sealing cover plates. The two sealing cover plates are slidably inserted into the base one-to-one. The two ends of one side of the pull rod are respectively connected to the two sealing cover plates, and the middle part of the pull rod is connected to the drive shaft of the top cylinder.

[0014] In some embodiments, both sides of the top of the base extend laterally toward the detection cavity to the top of the sealing cover plate. The cross-section of the sealing cover plate near the end of the base is designed in an "n" shape, and the periphery of the sealing cover plate is attached to the inner wall of the base.

[0015] In some embodiments, a sealing gasket is provided at the bottom of the sealing cover and at the end that abuts against the base.

[0016] In some embodiments, the bellows airtightness rapid testing device further includes a display, a filter pressure reducing oil mist separation valve, a leakage protection switch, a solenoid valve, a PLC controller, and a drive switch. The gas tank is connected to the gas nozzle through the filter pressure reducing oil mist separation valve and the solenoid valve. The sealing drive, differential pressure leak detector, filter pressure reducing oil mist separation valve, leakage protection switch, solenoid valve, and drive switch are all electrically connected to the PLC controller, and the PLC controller is electrically connected to the display.

[0017] In some embodiments, a universal adjustment lever is provided on the back of the display.

[0018] Compared with the prior art, the beneficial effects of the present invention include: by setting up the detection fixture, sealing component and leak detection component, the bellows and the detection chamber can be sealed separately, the bellows is automatically fixed during the process of driving the bellows to press against the seal, and the pressure resistance performance of the bellows can be detected at the same time. By using an air tank to inflate the bellows through the air nozzle, and measuring the air tightness of the bellows by the differential pressure leak detector, the bellows can be automatically fixed, and the pressure resistance and sealing performance can be tested in an integrated manner. The degree of automation is high, the manual intervention is small, the labor intensity of workers is reduced, and the work efficiency of bellows air tightness testing is improved.

[0019] A method for testing the airtightness of a bellows, performed using a rapid airtightness testing device for bellows, includes the following steps:

[0020] S100: When the operator presses the drive switch buttons on both sides of the equipment at the same time, the bellows housing airtightness leak detection equipment starts to work.

[0021] S200: A bellows is placed in the mounting base. The sealing drive drives the sealing cover to slide to the detection chamber to seal the detection chamber. The leak detection drive drives the air nozzle to move upward to press the bellows against the sealing cover to achieve a seal.

[0022] S300: The gas in the gas tank is controlled by a filter pressure reducing oil mist separation valve and a solenoid valve to enter the bellows through the air nozzle. The differential pressure leak detector detects the pressure difference change in the detection chamber and can accurately display the leakage rate of the parts. The leak detection drive continues to pressurize the bellows through the air nozzle to test the pressure resistance of the bellows.

[0023] S400: Displays the actual test results on the screen and compares them with the standard data to indicate whether the test is qualified or not. If the leakage amount meets the set parameter requirements, it is displayed in green as "qualified" and in red as "unqualified".

[0024] Compared with the prior art, the beneficial effects of the present invention include: the sealing drive component can achieve the sealing of the detection chamber; the leak detection drive component and the air nozzle can achieve the sealing of the bellows; the air tank is filled into the bellows through the air nozzle; the differential pressure leak detector detects the pressure difference change in the detection chamber and compares it with standard data; and the display shows the result of whether it is qualified or not. This enables the device to automatically clamp, automatically detect, automatically judge and identify, and automatically collect data. It has a high degree of automation, requires less manual intervention, reduces the labor intensity of workers, and improves the efficiency of bellows airtightness testing. Attached Figure Description

[0025] Figure 1 This is a perspective view of an embodiment of the rapid airtightness testing device for bellows provided by the present invention;

[0026] Figure 2 yes Figure 1 An installation perspective view of the detection mechanism, conveying mechanism, and infeeding mechanism of the bellows airtightness rapid testing device;

[0027] Figure 3 yes Figure 1 Front cross-sectional view of the rapid testing device for the airtightness of bellows in China;

[0028] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 yes Figure 1 A three-dimensional diagram of the testing mechanism of the rapid airtightness testing device for bellows;

[0030] Figure 6 yes Figure 1 A three-dimensional diagram of the testing mechanism of the rapid airtightness testing device for bellows;

[0031] Figure 7 This is a front cross-sectional view of the detection mechanism of the bellows airtightness rapid detection device provided by the present invention during the detection process;

[0032] Figure 8 yes Figure 7 Enlarged view at point B in the middle;

[0033] Figure 9 yes Figure 1 Side view of the workbench of the rapid airtightness testing device for bellows in China;

[0034] Figure 10 yes Figure 1 A cross-sectional view of the conveying mechanism of the bellows airtightness rapid testing device.

[0035] Figure 11 This is a flowchart of the bellows airtightness testing method provided by the present invention.

[0036] In the picture:

[0037] 1. Testing mechanism; 11. Fixing assembly; 111. Feeding fixture; 112. Testing fixture; 1121. Base; 1122. Positioning sleeve; 1123. Testing chamber; 1124. Testing groove; 1125. Through hole; 12. Positioning drive component; 121. Swing motor; 122. Control board; 13. Sealing assembly; 131. Sealing cover plate; 132. Sealing drive component; 1321. Top cylinder; 1322. Pull rod; 14. Leak detection assembly; 141. Air nozzle; 142. Leak detection drive component; 143. Differential pressure leak detector; 15. Fixing plate; 16. Support column;

[0038] 2. Conveying mechanism; 21. Conveying assembly; 211. Conveyor belt; 212. Placement mark; 22. Conveying drive component; 221. Conveying roller; 222. Conveying motor; 223. Guide bracket; 224. Drop chute; 23. Support frame; 24. Support cylinder;

[0039] 3. Import mechanism; 31. Import plate; 32. Import drive component; 321. Lateral drive cylinder; 322. Lifting drive cylinder; 323. Mounting plate;

[0040] 4. Display; 41. Universal adjustment rod; 5. Filter pressure reducing oil mist separator valve; 6. Leakage protection switch; 7. Solenoid valve; 8. PLC controller; 9. Drive switch; 10. Workbench; 101. Bellows. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] This invention provides a rapid testing device and method for the airtightness of corrugated pipes.

[0043] Example 1:

[0044] like Figure 1 , Figure 2 , Figure 5 , Figure 7 As shown, Embodiment 1 of the present invention provides a rapid testing device for the airtightness of a bellows, including a testing mechanism 1, which includes a fixing component 11, a sealing component 13, and a leak detection component 14.

[0045] like Figure 2 , Figure 5 As shown, the fixing component 11 includes a testing fixture 112, which includes a base 1121. The interior of the base 1121 forms a testing cavity 1123 for placing the corrugated pipe 101, and a feeding groove for placing the corrugated pipe 101 is provided above the base 1121.

[0046] like Figure 5 , Figure 6 As shown, the sealing assembly 13 includes a sealing cover plate 131 and a sealing drive member 132. The sealing cover plate 131 is disposed on one side of the base 1121 and is slidably inserted into and connected to the base 1121. The sealing drive member 132 is connected to the sealing cover plate 131 to drive the sealing cover plate 131 to press against the base 1121 to seal the detection chamber 1123.

[0047] like Figures 7 to 9As shown, the leak detection assembly 14 includes an air nozzle 141, a leak detection drive 142, an air tank, and a differential pressure leak detector 143. The air nozzle 141 is located below the detection fixture 112, and the air outlet of the air nozzle 141 passes through the base 1121 and can communicate with the interior of the bellows 101. The air outlet of the air tank is connected to the air nozzle 141 to inflate the bellows 101. The drive end of the leak detection drive 142 is connected to the air nozzle 141 to drive the bellows 101 upward to abut against the sealing cover plate 131 to seal the bellows 101. The detection end of the differential pressure leak detector 143 is located in the detection chamber 1123 outside the bellows 101 to determine the airtightness of the bellows 101 by identifying changes in the pressure value inside the detection chamber 1123.

[0048] In this device, the bellows 101 can be placed into the detection chamber 1123 on the base 1121 via the feeding trough of the base 1121. The sealing drive 132 drives the sealing cover 131 to slide into the base 1121 to seal the detection chamber 1123. After the detection chamber 1123 is sealed, one end of the sealing cover 131 is positioned at the feeding trough, and in conjunction with the leak detection drive 142, it is driven by the air nozzle 141 to move upwards on the bellows 101 until it abuts against the sealing cover 131. This causes the upper and lower ends of the bellows 101 to abut against the sealing cover 131 and the detection fixture 112, respectively, thus sealing the bellows 101. With the detection chamber 1123 and the bellows 101 both sealed, air can be used to... The canister is filled with air into the bellows 101 through the air nozzle 141. The detection end of the differential pressure leak detector 143 is located in the detection chamber 1123 on the outside of the bellows 101. By observing the change in air pressure in the detection chamber 1123, the air tightness of the bellows 101 is monitored over a certain period of time. Finally, the leak detection drive 142 is used to continue pressurizing the bellows 101 through the air nozzle 141 to test the pressure resistance of the bellows 101. If the pressure resistance of the bellows 101 fails, the bellows 101 will be damaged during the test. Therefore, its pressure resistance result can be judged based on the air tightness test result, thus realizing the test of the pressure resistance of the bellows 101. This device can achieve integrated testing of pressure resistance and sealing performance.

[0049] Furthermore, the bellows airtightness rapid testing device also includes a workbench 10, and the testing mechanism 1 also includes a fixing plate 15. The fixing plate 15 is connected to the workbench 10 through a support column 16, and the fixing component 11 is installed on the fixing plate 15.

[0050] like Figure 1 , Figure 2 , Figure 7As shown, in some embodiments, the bellows airtightness rapid testing device further includes a conveying mechanism 2 and an inlet mechanism 3. The testing mechanism 1 also includes a shifting drive 12. A leak detection station and a loading station are formed in the fixed assembly 11. The shifting drive 12 is connected to the fixed assembly 11 to drive the fixed assembly 11 to rotate to switch between the leak detection station and the loading station. The leak detection assembly 14 is used to detect the airtightness of the bellows 101 in the leak detection station. The fixed assembly 11 also includes a loading fixture 111. The loading fixture 111 and the testing fixture 112 have the same shape and both include a base 1121 and a positioning sleeve 1122.

[0051] Specifically, such as Figure 2 As shown, the conveying mechanism 2 includes a conveying component 21 and a conveying drive 22. A conveying section for placing the corrugated pipe 101 is formed above the conveying component 21. The conveying drive 22 is connected to the conveying component 21 to drive the conveying component 21 to move and convey the corrugated pipe 101 in the conveying section to one end closer to the detection mechanism 1.

[0052] Specifically, the import mechanism 3 includes an import plate 31 and an import drive 32. The import plate 31 is located above the conveying mechanism 2. The import drive 32 is connected to the import plate 31 to drive the import plate 31 to move. The movement stroke of the import plate 31 includes an upward translational position for the corrugated pipe 101 to pass between the import plate 31 and the conveying assembly 21, and a forward translational position for the corrugated pipe 101 to be imported into the loading station.

[0053] Specifically, the conveying section of the conveying component 21 can hold the corrugated pipe 101 to be tested. Under the driving action of the conveying drive component 22, the conveying component 21 conveys the corrugated pipe 101 in the conveying section to one end closer to the testing mechanism 1. The guide drive component 32 drives the guide plate 31 to move upward so that the corrugated pipe 101 passes between the guide plate 31 and the conveying component 21, so that the corrugated pipe 101 is located on the side of the guide plate 31 closer to the testing mechanism 1. The guide drive component 32 drives the guide plate 31 to reset and then drives it to move towards the direction closer to the loading station so as to guide the corrugated pipe 101 to the loading station. Finally, the switching drive component 12 can realize the switching between the leak detection station and the loading station, and send the corrugated pipe 101 from the loading station to the leak detection station. At this time, the leak detection station is switched to the loading station for continuous loading. Finally, the leak detection component 14 is used to detect the airtightness of the corrugated pipe 101.

[0054] Furthermore, the testing mechanism 1, the conveying mechanism 2, and the importing mechanism 3 are all installed on the workbench 10.

[0055] Furthermore, such as Figure 8As shown, the conveying mechanism 2 also includes a support cylinder 24 for supporting the corrugated pipe 101. The lower end of the support cylinder 24 extends outward to form a support groove. In use, the corrugated pipe 101 can be directly sleeved on the outside of the support cylinder 24, and the support cylinder 24 can be placed in the support groove to avoid the corrugated pipe 101 from bending or tipping over during the conveying process.

[0056] like Figure 2 , Figure 10 As shown, in some embodiments, the conveying assembly 21 includes a conveyor belt 211, the conveying drive 22 includes two conveying rollers 221 and a conveying motor 222, and the conveying mechanism 2 also includes a support frame 23. The support frame 23 is mounted on the worktable 10. The two conveying rollers 221 are arranged side by side on the support frame 23 and are rotatably connected to the support frame 23 through bearings. The conveyor belt 211 is sleeved between the two conveying rollers 221. The conveying motor 222 is coaxially connected to one of the conveying rollers 221 to drive the conveying roller 221 to rotate and drive the movement of the transmission belt, thereby realizing the transmission of the corrugated pipe 101 through the conveyor belt 211.

[0057] Furthermore, in some embodiments, such as Figure 2 As shown, the conveying mechanism 2 also includes a guide bracket 223. When the corrugated pipe 101 is automatically conveyed and unloaded by the conveying component 21, it will fall in a state of sudden weightlessness. At this time, it cannot be guaranteed that the corrugated pipe 101 is in the leak detection station or in the state to be tested. Slight deviation of the corrugated pipe 101 will affect the detection accuracy. Therefore, the guide bracket 223 is set. One end of the guide bracket 223 is located on one side of the conveyor belt 211 and is on the same horizontal plane as the upper side of the conveyor belt 211, so as to ensure that the guiding mechanism 3 can smoothly guide the corrugated pipe 101 on the conveying component 21 to the guide bracket 223. The other end of the guide bracket 223 extends to the top of the loading station. A dropping groove 224 is opened on the guide bracket 223 at the position corresponding to the loading station. The diameter of the dropping groove 224 is slightly larger than the outer diameter of the corrugated pipe 101, so that the corrugated pipe 101 can be unloaded through the dropping groove 224. At the same time, the dropping groove 224 is used to further limit the corrugated pipe 101 to ensure that the corrugated pipe 101 is in the state to be tested.

[0058] Furthermore, in some embodiments, the outer surface of the conveyor belt 211 is provided with placement marks 212 at intervals. The placement marks 212 are arranged in parallel with the material drop chute 224. The placement marks 212 are circular stickers pasted on the outer surface of the conveyor belt 211. The stickers are made of smooth adhesive paper to reduce the friction between them and the corrugated pipe 101, so as to guide the material to the corrugated pipe 101 in the future.

[0059] like Figures 2 to 4As shown, in some embodiments, the import drive component 32 includes a lateral drive cylinder 321, a lifting drive cylinder 322, and a mounting plate 323. The drive end of the lateral drive cylinder 321 is connected to the mounting plate 323. The lifting drive cylinder 322 is mounted on the mounting plate 323, and its drive end is connected to the import plate 31 to drive the import plate 31 to move up and down. The lateral drive cylinder 321 is used to drive the import plate 31 to move laterally through the lifting drive cylinder 322 and the mounting plate 323. In use, the lifting... The drive cylinder 322 drives the guide plate 31 to rise. At this time, the conveying component 21 sends a corrugated pipe 101 into the side of the guide plate 31 near the detection mechanism 1. Then, the lifting drive cylinder 322 drives the guide plate 31 to reset and be located on the side of the corrugated pipe 101 away from the detection mechanism 1. Finally, the lateral drive cylinder 321 drives the guide plate 31 to move laterally towards the detection mechanism 1 until the corrugated pipe 101 is dropped into the loading station via the guide bracket 223 and the material drop chute 224 on the guide bracket 223.

[0060] In some embodiments, such as Figure 7 As shown, the shifting drive 12 includes a swing motor 121 and a control board 122. The swing motor 121 is mounted on a fixed plate 15. The transverse drive cylinder 321 is fixedly connected to the fixed plate 15. The control board 122 is connected to both the loading fixture 111 and the detection fixture 112. The drive shaft of the swing motor 121 passes through the fixed plate 15 and is connected to the control board 122 to drive the control board 122 to swing intermittently, thereby driving the loading fixture 111 and the detection fixture 112 on the control board 122 to shift.

[0061] Furthermore, both the loading fixture 111 and the inspection fixture 112 are detachably connected to the control board 122 by bolts, so as to facilitate the disassembly, maintenance and replacement of the loading fixture 111 and the inspection fixture 112 in the future.

[0062] like Figure 8As shown, in some embodiments, the testing fixture 112 further includes a positioning sleeve 1122, which is slidably connected to the base 1121. The upper end of the positioning sleeve 1122 has a stepped testing groove 1124, and the lower end of the positioning sleeve 1122 has a through hole 1125 for inserting the air outlet pipe of the air nozzle 141 into the corrugated pipe 101. During loading, the corrugated pipe 101 enters the testing chamber 1123 through the material drop groove 224 on the guide bracket 223 and the loading groove of the base 1121. The corrugated pipe 101... The air nozzle 141 is placed on the detection groove 1124, so that the air outlet pipe of the air nozzle 141 can communicate with the inside of the bellows 101 through the through hole 1125. One end of the air nozzle 141 passes through the base 1121 and abuts against the positioning sleeve 1122. Under the drive of the leak detection drive component 142, the positioning sleeve 1122 can be driven to slide on the base 1121, so that the bellows 101 can be driven to abut against the sealing cover plate 131 through the positioning sleeve 1122, thereby achieving the sealing of the detection tube. The setting of the positioning sleeve 1122 makes it easier to place the bellows 101 and effectively plays a positioning role.

[0063] Furthermore, a groove is provided on the inner wall of the positioning sleeve 1122. After the bellows 101 moves into the positioning sleeve 1122, the support cylinder 24 enters the groove to achieve precise positioning of the bellows 101 by the support cylinder 24. In use, the support cylinder 24 can be placed against the support cylinder 24 from below the bellows 101. The thickness of the support cylinder 24 is greater than the thickness of the bellows 101, which can improve the stability of the bellows 101. Specifically, the outer diameter of the support cylinder 24 is smaller than the minimum diameter of the bellows 101, so that the support cylinder 24 will not cause blockage inside the bellows 101, thus ensuring the efficient detection of the device.

[0064] In some embodiments, such as Figure 5 , Figure 6 As shown, the sealing drive component 132 includes a top cylinder 1321 and a pull rod 1322. The top cylinder 1321 is mounted on the fixed plate 15, and the pull rod 1322 is connected to the sealing cover plate 131. The top cylinder 1321 is connected to the pull rod 1322. The top cylinder 1321 drives the pull rod 1322 to move closer to the base 1121. The pull rod 1322 can drive the sealing cover plate 131 to slide into the base 1121, thereby sealing the feeding trough and the detection chamber 1123. The leak detection drive component 142 includes a bottom cylinder, which is connected to the air nozzle 141.

[0065] Furthermore, in order to improve the detection efficiency of the bellows 101, in some embodiments, the fixing component 11 and the conveying mechanism 2 are provided with two sets, and two sealing cover plates 131 are provided. The guide plate 31 is horizontally arranged between the two conveying mechanisms 2 to realize the synchronous material guiding of the two bellows 101 on the two conveying mechanisms 2. Thus, the detection fixture 112 is provided with two sets, and the two sealing cover plates 131 are slidably inserted into the base 1121 one by one. The two ends of one side of the pull rod 1322 are respectively connected to the two sealing cover plates 131. The middle part of the pull rod 1322 is connected to the drive shaft of the top cylinder 1321. The top cylinder 1321 can drive the sealing cover plates 131 at both ends of the pull rod 1322 to enter the base 1121 at the same time to seal the base 1121. Not only can the sealing of the two bellows 101 be realized at the same time, but the sealing cover plates 131 are also subjected to uniform force, and their sealing performance is better.

[0066] Furthermore, when switching between the loading station and the leak detection station, the bottom cylinder can drive the air nozzle 141 to separate from the positioning sleeve 1122, so that the air nozzle 141 is moved to the bottom of the detection fixture 112 and the top of the air nozzle 141 is lower than the bottom of the detection fixture 112. When the detection work is performed, the bottom cylinder drives the air nozzle 141 to move upward and drives the positioning sleeve 1122 to slide on the base 1121. The air outlet pipe of the air nozzle 141 extends into the bellows 101 through the through hole 1125, so that the upper part of the air nozzle 141 can abut against the positioning sleeve 1122 to achieve a seal between the two.

[0067] Furthermore, to ensure the sealing effect of the device during airtightness testing, in some embodiments, both sides of the top of the base 1121 extend laterally toward the detection chamber 1123 to the top of both sides of the sealing cover 131. After the sealing cover 131 enters the base 1121, the upper end of the base 1121 can press against the top of the sealing cover 131. During the sealing operation of the bellows 101, the base can improve the stability of the sealing cover 131 and prevent one end of the sealing cover 131 from shifting upward when the bellows 101 is pressed against it. The cross-section of the sealing cover 131 near the base 1121 is designed with an "n" shape. The periphery of the sealing cover 131 is attached to the inner wall of the base 1121, increasing the contact area between the sealing cover 131 and the base 1121 to improve the sealing effect.

[0068] Furthermore, in some embodiments, sealing gaskets are provided at the bottom of the sealing cover plate 131 and at the end that abuts against the base 1121, which further improves the sealing effect of the device during airtightness testing.

[0069] like Figures 2 to 9As shown, in some embodiments, the bellows airtightness rapid testing device further includes a display 4, a filter pressure reducing oil mist separation valve 5, a leakage protection switch 6, a solenoid valve 7, a PLC controller 8, and a drive switch 9. The gas tank is connected to the gas nozzle 141 through the filter pressure reducing oil mist separation valve 5 and the solenoid valve 7. The shifting drive 12, the conveying drive 22, the guiding drive 32, the sealing drive 132, the differential pressure leak detector 143, the filter pressure reducing oil mist separation valve 5, the leakage protection switch 6, the solenoid valve 7, and the drive switch 9 are all electrically connected to the PLC controller 8. The PLC controller 8 is electrically connected to the display 4. The actual test results can be displayed on the display 4. The display 4 can be used to show whether the part is qualified for testing, to start and stop the testing process, and to control the rise and fall of the gas nozzle 141 through the bottom cylinder and to control the sliding of the sealing cover plate 131 through the top cylinder 1321. The system is driven by a swing motor 121 to switch between the loading and leak detection stations, and by a conveyor motor 222 to drive the corrugated pipe 101 on the conveyor belt 211. The filter, pressure reducing oil mist separator 5, solenoid valve 7, pressure boosting valve, gas tank, leakage protection switch 6, PLC controller 8, and air pipes are all installed on the workbench 10. Various valve bodies are connected by air pipes in a specific order. The PLC controller 8 can be programmed, stored, and recalled for different products, and parameters including program name, inflation pressure, inflation time, holding time, test time, and maximum leakage are set. The gas tightness test standard is no leakage after holding pressure for 30 seconds at 1MPa. The entire automated testing is achieved under the control of the PLC controller 8. The drive switch 9 controls the opening and closing of the PLC controller 8, and the leakage protection switch 6 shuts off the power to the device in case of leakage, providing leakage protection. It should be noted that the leakage current protection switch 6 and the differential pressure leak detector 143 are existing technologies that are widely used in the fields of electrical control and pipeline airtightness testing. Their working principles can be used as a reference for understanding.

[0070] Furthermore, a universal adjustment lever 41 is installed on the back of the monitor 4, which can be adjusted to a suitable position according to the usage habits of different operators.

[0071] This invention, through the setting of the detection fixture 112, sealing component 13, and leak detection component 14, can seal the bellows 101 and the detection chamber 1123 respectively. During the process of driving the bellows 101 to press against the seal, the bellows 101 is automatically fixed. At the same time, the pressure resistance performance of the bellows 101 can be tested. By using an air tank to inflate the bellows 101 through the air nozzle 141, the air tightness of the bellows 101 is measured by the differential pressure leak detector 143. This invention can achieve automatic fixing of the bellows 101 and integrated testing of pressure resistance and sealing performance. It has a high degree of automation, requires less manual intervention, reduces the labor intensity of workers, and improves the work efficiency of bellows 101 air tightness testing.

[0072] Example 2:

[0073] like Figure 11 As shown, the present invention provides a detection method for a rapid airtightness testing device for corrugated pipes, which is executed by the rapid airtightness testing device for corrugated pipes and includes the following steps:

[0074] S100: When the operator presses the drive switch 9 button on both sides of the equipment at the same time, the bellows 101 housing airtightness leak detection equipment starts to work.

[0075] S200: A bellows 101 is placed in the mounting base 1121. The sealing drive 132 drives the sealing cover 131 to slide to the detection chamber 1123 to seal the detection chamber 1123. The leak detection drive 142 drives the air nozzle 141 to move upward to press the bellows 101 against the sealing cover 131 to achieve a seal.

[0076] S300: The filter pressure reducing oil mist separation valve 5 and the solenoid valve 7 are used to control the gas in the gas tank to enter the bellows 101 through the air nozzle 141. The differential pressure leak detector 143 detects the differential pressure change in the detection chamber 1123, which can accurately display the leakage rate of the parts. The leak detection drive 142 continues to pressurize the bellows 101 through the air nozzle 141 to detect the pressure resistance of the bellows 101.

[0077] S400: Displays the actual test results on display 4 and compares them with standard data to indicate whether the test is qualified or not. If the leakage amount meets the set parameter requirements, it is displayed in green as "qualified" and in red as "unqualified".

[0078] Furthermore, before step S200, the steps include: fitting the corrugated pipe 101 onto the support cylinder 24, placing the support cylinder 24 on the conveyor belt 211, using the conveyor mechanism 2 to transport the corrugated pipe 101 to the end of the conveyor belt 211 near the detection mechanism 1, and guiding the corrugated pipe 101 to the loading station via the guide bracket 223 through the inlet mechanism 3, and driving the loading fixture 111 to rotate to the leak detection station by the swing motor 121, so as to realize the automatic placement of the corrugated pipe 101 in the mounting base 1121.

[0079] This invention achieves sealing of the detection chamber 1123 through the sealing drive component 132, and seals the bellows 101 through the leak detection drive component 142 and the air nozzle 141. The bellows 101 is filled with air from the air tank through the air nozzle 141. The differential pressure leak detector 143 detects the pressure difference change in the detection chamber 1123 and compares it with standard data. The result of whether it is qualified or not is displayed on the display 4. This allows the device to automatically clamp, automatically detect, automatically judge and identify, and automatically collect data. It has a high degree of automation, requires little manual intervention, reduces the labor intensity of workers, and improves the working efficiency of the airtightness detection of the bellows 101.

[0080] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A rapid testing device for the airtightness of corrugated pipes, characterized in that, The testing organization includes: A fixing component, the fixing component including a testing fixture, the testing fixture including a base, the interior of the base forming a testing cavity for placing a bellows, and the top of the base having a feeding groove for placing a bellows. A sealing assembly, comprising a sealing cover plate and a sealing drive component, wherein the sealing cover plate is disposed on one side of the base and slidably inserted into the base, and the sealing drive component is connected to the sealing cover plate to drive the sealing cover plate to press against the base to seal the detection chamber; A leak detection assembly includes an air nozzle, a leak detection drive, an air tank, and a differential pressure leak detector. The air nozzle is located below the detection fixture, and its outlet pipe passes through the base and communicates with the interior of the bellows. The outlet of the air tank is connected to the air nozzle to inflate the bellows. The drive end of the leak detection drive is connected to the air nozzle to drive the bellows upward to abut against the sealing cover to seal the bellows. The detection end of the differential pressure leak detector is located in the detection chamber outside the bellows to determine the airtightness of the bellows by identifying changes in the pressure value within the detection chamber. The testing fixture also includes a positioning sleeve, which is slidably connected to the base. The upper end of the positioning sleeve has a stepped testing groove, and the lower end of the positioning sleeve has a through hole for inserting an air outlet pipe into the corrugated pipe.

2. The rapid testing device for the airtightness of a corrugated pipe according to claim 1, characterized in that, One end of the air nozzle passes through the base and abuts against the positioning sleeve, and can drive the positioning sleeve to slide on the base under the drive of the leak detection drive, so as to drive the bellows to abut against the sealing cover plate through the positioning sleeve.

3. The rapid testing device for the airtightness of a corrugated pipe according to claim 1, characterized in that, The sealing drive component includes a top cylinder and a pull rod. The pull rod is connected to the sealing cover plate. The top cylinder is connected to the pull rod to drive the sealing cover plate to slide into the base. The leak detection drive component includes a bottom cylinder, which is connected to the air nozzle.

4. The rapid testing device for the airtightness of a corrugated pipe according to claim 3, characterized in that, The testing fixture is provided in two sets, and there are two sealing cover plates. The two sealing cover plates are slidably inserted into the base in a one-to-one correspondence. The two ends of one side of the pull rod are respectively connected to the two sealing cover plates, and the middle part of the pull rod is connected to the drive shaft of the top cylinder.

5. The rapid testing device for the airtightness of a corrugated pipe according to claim 1, characterized in that, Both sides of the top of the base extend laterally toward the detection cavity to the top of the sealing cover plate. The cross-section of the sealing cover plate near the base end is designed in an "n" shape, and the periphery of the sealing cover plate is attached to the inner wall of the base.

6. The rapid testing device for the airtightness of a corrugated pipe according to claim 1, characterized in that, The bottom of the sealing cover and the end that abuts against the base are both provided with sealing gaskets.

7. The rapid testing device for the airtightness of a corrugated pipe according to claim 1, characterized in that, The bellows airtightness rapid testing device also includes a display, a filter pressure reducing oil mist separation valve, a leakage protection switch, a solenoid valve, a PLC controller, and a drive switch. The gas tank is connected to the gas nozzle through the filter pressure reducing oil mist separation valve and the solenoid valve. The sealing drive, differential pressure leak detector, filter pressure reducing oil mist separation valve, leakage protection switch, solenoid valve, and drive switch are all electrically connected to the PLC controller. The PLC controller is electrically connected to the display.

8. The rapid testing device for the airtightness of a corrugated pipe according to claim 7, characterized in that, The display has a universal adjustment rod on the back.

9. A method for testing the airtightness of a corrugated pipe, applicable to the rapid airtightness testing device for corrugated pipes as described in claim 8, characterized in that, Includes the following steps: S100: When the operator presses the drive switch buttons on both sides of the equipment at the same time, the bellows housing airtightness leak detection equipment starts to work. S200: A bellows is placed in the mounting base. The sealing drive drives the sealing cover to slide to the detection chamber to seal the detection chamber. The leak detection drive drives the air nozzle to move upward to press the bellows against the sealing cover to achieve a seal. S300: The gas in the gas tank is controlled by a filter pressure reducing oil mist separation valve and a solenoid valve to enter the bellows through the air nozzle. The differential pressure leak detector detects the pressure difference change in the detection chamber and can accurately display the leakage rate of the parts. The leak detection drive continues to pressurize the bellows through the air nozzle to test the pressure resistance of the bellows. S400: Displays the actual test results on the screen and compares them with the standard data to indicate whether the test is qualified or not. If the leakage amount meets the set parameter requirements, it is displayed in green as "qualified" and in red as "unqualified".

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