A helium leak detection device for stainless steel corrugated pipes used in gas supply

Abstract

This utility model relates to a helium leak detection device for stainless steel corrugated pipes used in gas production, comprising: a detection box containing water, a drain valve on one side of the detection box, and a visual inspection device for detecting air bubbles generated by the corrugated pipe in the water; a conversion assembly disposed inside the detection box and capable of rotating within the detection box to transfer the corrugated pipe from the loading position to the detection position; and an inflation assembly capable of passing helium into the corrugated pipe. The conversion assembly includes a rotating shaft rotatably disposed within the detection box, with a rotating cylinder coaxially connected to the rotating shaft. This utility model, through multiple elastic buckles adapted to the corrugated pipe structure on the turntable, enables continuous clamping of multiple corrugated pipes. Furthermore, the automatic reset and re-insertion design of the inflation head significantly shortens changeover time, meeting the high-efficiency testing requirements of mass production.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel corrugated pipe testing technology, specifically a helium leak detection device for stainless steel corrugated pipes used in gas applications. Background Technology

[0002] Stainless steel corrugated pipes for gas supply are key components connecting gas pipelines and gas stoves, and their sealing performance directly affects gas safety in homes and commercial establishments. These corrugated pipes, thanks to the corrosion resistance, excellent flexibility, and fatigue resistance of stainless steel, are widely used in urban gas transmission systems, becoming a core component ensuring the safety of gas terminal connections.

[0003] In existing technologies, the sealing performance of bellows is mainly tested using water immersion combined with gas pressure or helium gas spectrometry. Among these, helium, due to its small molecular weight, high permeability, and stable chemical properties, is an ideal tracer gas and can efficiently detect minute leaks.

[0004] Traditional devices often use fixed inflation heads, requiring manual clamping of each bellows and manual insertion of the inflation head. After testing, the bellows must be completely disassembled to replace the test piece, resulting in long testing times per piece and making it difficult to meet the needs of large-scale industrial production. Furthermore, existing devices suffer from poor clamping and positioning stability. The unique structure of the snap-fit ​​nuts and conduit at both ends of the bellows makes it difficult for traditional clamps to achieve rapid tightening, frequently leading to helium leaks due to unstable fixing, thus affecting testing accuracy. Utility Model Content

[0005] The purpose of this utility model is to provide a helium leak detection device for stainless steel corrugated pipes used in gas production. By setting multiple elastic buckles on the turntable to adapt to the corrugated pipe structure, multiple corrugated pipes can be continuously clamped. The automatic reset and repeated insertion design of the inflation head can significantly shorten the replacement time and meet the high-efficiency testing requirements of mass production.

[0006] To address the problems of existing technologies, this utility model provides a helium leak detection device for stainless steel corrugated pipes used in gas applications, comprising: a detection box containing water, a drain valve on one side of the detection box, and a visual detection device for detecting air bubbles generated by the corrugated pipe in the water; a conversion assembly disposed inside the detection box and capable of rotating within the detection box to transfer the corrugated pipe from the loading position to the detection position; and an inflation assembly capable of passing helium into the corrugated pipe. The conversion assembly includes a rotating shaft rotatably disposed within the detection box, with a rotating cylinder coaxially connected to the rotating shaft. The rotating cylinder is provided with several receiving plates that can slide on the rotating cylinder, and each receiving plate is evenly provided with several elastic buckles for securing the corrugated pipe in a circumferential direction. The inflation assembly is provided in two sets, respectively disposed at both ends of the corrugated pipe. Each inflation assembly also includes an inflation head that can reciprocate and be inserted into the corrugated pipe, and the inflation head can reciprocate around the rotating shaft.

[0007] Preferably, the inflation assembly further includes a sleeve fitted on the rotating shaft, and a connecting rod is fixedly connected to one end of the sleeve near the receiving plate, and one end of the connecting rod is connected to a telescopic drive component. The output end of the telescopic drive component is connected to a moving rod, and the end of the moving rod is connected to the inflation head. The inflation assembly also includes a second rotating component disposed outside the detection box and used to drive the sleeve to reciprocate.

[0008] Preferably, the interior of the movable rod is hollow, and a sealing ring is fitted at the position where the inflation head contacts the bellows.

[0009] Preferably, the inflation assembly further includes an air tank disposed outside the testing box. The air outlet of the air tank is also equipped with a pressure gauge and a solenoid valve, and the air outlet of the solenoid valve is connected to a pipe, one end of which is connected to a moving rod.

[0010] Preferably, the second rotating assembly includes a fourth pulley sleeved on the end face of the sleeve extending to the outside of the detection box. The second rotating assembly also includes a second rotating drive unit mounted on the outer wall of the detection box. The output end of the second rotating drive unit is connected to a third pulley, and the third pulley and the fourth pulley are connected by a belt.

[0011] Preferably, the conversion assembly further includes a slide groove formed along the length of the rotating cylinder, and several slide grooves are distributed on the rotating cylinder. The receiving plate is also provided with a slider that slides in cooperation with the slide groove.

[0012] Preferably, the conversion assembly further includes a fixing bolt rotatably disposed on the receiving plate for fixing the receiving plate to the rotating cylinder, and one end of the fixing bolt can be inserted into the slide groove.

[0013] Preferably, the conversion assembly further includes a first rotating assembly disposed outside the detection box for driving the rotating cylinder to rotate. The first rotating assembly includes a second pulley sleeved on the rotating shaft and a first rotating drive component installed outside the detection box. The output end of the first rotating drive component is connected to the first pulley, and the first pulley and the second pulley are connected by a belt.

[0014] The advantages of this utility model compared to the prior art are: This application proposes a highly efficient sealing test through structural optimization. Specifically, several receiving plates are evenly distributed circumferentially on a rotating cylinder. Each receiving plate has multiple sets of elastic clips on its surface. The deformation clamping force of the elastic clips enables rapid positioning and stable installation of the stainless steel bellows, avoiding pipe displacement caused by vibration during the test. During testing, the telescopic drive component drives the moving rod to move axially, allowing the inflation head to be inserted into both ends of the bellows under test, forming an airtight connection. Subsequently, the rotating cylinder drives the receiving plates to rotate synchronously, immersing the bellows in the test water tank. At this time, the solenoid valve opens, and helium gas is injected into the bellows through the inflation head. The sealing defects are determined by observing whether continuous bubbles are generated in the water. After the test is completed, the telescopic drive component reverses its movement, causing the inflation head to disengage from the bellows. The sleeve rotates under the drive of the second rotating component, and through the transmission action of the connecting rod, it drives the moving rod to return to the corresponding position of the next bellows to be tested, realizing the automated cycle of the testing process. This device significantly improves the testing efficiency and the reliability of the results through the coordinated design of mechanical structure and pneumatic control. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional structural schematic diagram of a helium leak detection device for a stainless steel corrugated pipe used for gas supply according to this utility model.

[0016] Figure 2 This is a second three-dimensional structural diagram of a helium leak detection device for a stainless steel corrugated pipe used for gas supply according to this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of a helium leak detection device for a stainless steel corrugated pipe used for gas supply, according to this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the rotating cylinder and receiving plate of a helium leak detection device for a stainless steel corrugated pipe for gas supply according to this utility model.

[0019] Figure 5 This is a first three-dimensional structural diagram of the inflation component of a helium leak detection device for a stainless steel corrugated pipe used for gas supply according to this utility model.

[0020] Figure 6 This is a schematic diagram of the second three-dimensional structure of the inflation component of a helium leak detection device for a stainless steel corrugated pipe for gas supply according to this utility model.

[0021] The following are the labels in the diagram: 1. Detection box; 11. Drain valve; 2. Conversion assembly; 21. Rotating shaft; 22. Rotating cylinder; 221. Slide groove; 23. Receiving plate; 231. Elastic buckle; 232. Slider; 233. Fixing bolt; 24. First rotating assembly; 241. First rotating drive component; 242. First pulley; 243. Second pulley; 3. Inflation assembly; 31. Inflation head; 32. Moving rod; 33. Telescopic drive component; 34. Air tank; 341. Solenoid valve; 35. Pipeline; 36. Second rotating assembly; 361. Second rotating drive component; 362. Third pulley; 363. Fourth pulley; 37. Sleeve; 38. Connecting rod. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0023] Reference Figures 1-6 As shown, this utility model provides a helium leak detection device for stainless steel corrugated pipes used in gas applications, comprising: a detection box 1, which contains water, and a drain valve 11 on one side of the detection box 1. The detection box 1 also includes a visual inspection device for detecting air bubbles generated by the corrugated pipe in the water. The detection box 1 serves as the main supporting structure of the device, storing water for leak detection and providing a medium environment for underwater sealing testing of the corrugated pipe. The drain valve 11 on one side controls the discharge and replacement of water in the box, facilitating equipment maintenance and wastewater treatment. The integrated visual inspection device uses image recognition technology to capture air bubbles in the water in real time, achieving automated judgment of the corrugated pipe's leak status, replacing manual observation to improve detection accuracy and efficiency. The conversion component 2 is located inside the detection box 1 and can rotate within the detection box 1 to transfer the bellows from the loading position to the detection position; the inflation component 3 can pass helium gas into the bellows; the conversion component 2 includes a rotating shaft 21 rotatably disposed in the detection box 1, and a rotating cylinder 22 is coaxially connected to the rotating shaft 21. The rotating cylinder 22 is provided with several receiving plates 23 that can slide on the rotating cylinder 22, and each receiving plate 23 is provided with several elastic buckles 231 evenly arranged in a circumferential direction for locking the bellows. The inflation component 3 is provided in two sets and is respectively disposed at both ends of the bellows. Each set of inflation components 3 also includes an inflation head 31 that can reciprocate and be inserted into the bellows, and the inflation head 31 can reciprocate around the rotating shaft 21.

[0024] During operation, the position of the receiving plate 23 on the rotating cylinder 22 is adjusted according to the length of the corrugated pipe. The corrugated pipe to be tested is fixed to the loading position of the receiving plate 23 via the elastic buckle 231. After the equipment is started, the rotating shaft 21 drives the rotating cylinder 22 to rotate, moving the corrugated pipe to the previous working position of the testing position. At this time, the inflation head 31 of the inflation assembly 3 moves and inserts into both ends of the corrugated pipe, filling it with helium. The rotating shaft 21 drives the rotating cylinder 22 to rotate, moving the corrugated pipe to the testing position (underwater area). If there is a leak in the corrugated pipe, the helium escapes and forms bubbles. The visual inspection device detects the bubbles and determines it to be a defective product. After the test is completed, the inflation head 31 disengages from the interface and rotates to reset. The conversion assembly 2 continues to rotate to move the next set of corrugated pipes to the testing position, repeating the above process, ultimately realizing continuous and automated sealing test of stainless steel corrugated pipes for gas.

[0025] The inflation assembly 3 also includes a sleeve 37 fitted onto the rotating shaft 21, and a connecting rod 38 is fixedly connected to one end of the sleeve 37 near the receiving plate 23. One end of the connecting rod 38 is connected to a telescopic drive member 33, and the output end of the telescopic drive member 33 is connected to a moving rod 32. The end of the moving rod 32 is connected to the inflation head 31. The inflation assembly 3 also includes a second rotating assembly 36 disposed outside the detection box 1 and used to drive the sleeve 37 to reciprocate. The second rotating assembly 36 includes a fourth pulley 363 fitted onto the end face of the sleeve 37 extending to the outside of the detection box 1. The second rotating assembly 36 also includes a second rotating drive member 361 mounted on the outer wall of the detection box 1. The output end of the second rotating drive member 361 is connected to a third pulley 362, and the third pulley 362 and the fourth pulley 363 are connected by a belt.

[0026] The second rotating assembly 36 starts working, and the second rotating drive 361 drives the third pulley 362 to rotate. The belt drives the fourth pulley 363 and the sleeve 37 to rotate. The sleeve 37 drives the telescopic drive 33, the moving rod 32 and the inflation head 31 to rotate to the position corresponding to both ends of the bellows through the connecting rod 38. Then the telescopic drive 33 drives the moving rod 32 to move, so that the inflation head 31 is inserted into both ends of the bellows.

[0027] The movable rod 32 is hollow inside, and a sealing ring is fitted at the contact point between the inflation head 31 and the bellows. The inflation head 31 is inserted into both ends of the bellows, and the sealing ring on the inflation head 31 fits tightly with the bellows interface to achieve a good seal.

[0028] The inflation assembly 3 also includes an air tank 34 located outside the test box 1. The air outlet of the air tank 34 is equipped with a pressure gauge and a solenoid valve 341, and the air outlet of the solenoid valve 341 is connected to a pipe 35. One end of the pipe 35 is connected to the moving rod 32.

[0029] The control system (not shown in the figure, representing prior art) opens the solenoid valve 341. Helium gas in the storage tank 34, after pressure monitoring by a pressure gauge, is transported through pipe 35 to the hollow moving rod 32, then from the moving rod 32 to the inflation head 31, and finally into the bellows. If there is a leak in the bellows, helium gas escapes, forming bubbles. A visual inspection device detects these bubbles and determines the product to be defective. After the inspection is completed, the solenoid valve 341 closes, stopping the helium gas supply. The conversion assembly 2 also includes a slide groove 221 formed along the length of the rotating cylinder 22, and several slide grooves 221 are distributed on the rotating cylinder 22. The receiving plate 23 is also provided with a slider 232 that slides in cooperation with the slide groove 221. The conversion assembly 2 also includes a fixing bolt 233 rotatably disposed on the receiving plate 23 for fixing the receiving plate 23 to the rotating cylinder 22, and one end of the fixing bolt 233 can be inserted into the slide groove 221.

[0030] According to the length of the corrugated pipe to be tested, loosen the fixing bolt 233, adjust the position of the receiving plate 23 on the rotating cylinder 22 by sliding the slider 232 in the slide groove 221, tighten the fixing bolt 233 after adjustment, fix the receiving plate 23, and then fix the corrugated pipe to be tested at the feeding position of the receiving plate 23 by the elastic buckle 231.

[0031] The conversion assembly 2 also includes a first rotating assembly 24 disposed outside the detection box 1 for driving the rotating cylinder 22 to rotate. The first rotating assembly 24 includes a second pulley 243 sleeved on the rotating shaft 21 and a first rotating drive 241 installed outside the detection box 1. The output end of the first rotating drive 241 is connected to a first pulley 242, and the first pulley 242 and the second pulley 243 are connected by a belt.

[0032] The first rotary drive 241 drives the first pulley 242 to rotate, which in turn drives the second pulley 243 and the rotating shaft 21 to rotate via the belt. The rotating shaft 21 drives the rotating cylinder 22 to rotate, thus moving the bellows to the detection position (underwater area).

[0033] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A helium leak detection device for a stainless steel bellows for gas, characterized by ,include: The test box (1) contains water and a drain valve (11) is provided on one side of the test box (1). The test box (1) also has a visual detection device for detecting bubbles generated by the corrugated pipe in the water. The conversion component (2) is located inside the detection box (1) and can rotate in the detection box (1) to transfer the bellows from the loading position to the detection position; The inflation component (3) is capable of passing helium gas through the bellows; The conversion component (2) includes a rotating shaft (21) rotatably disposed in the detection box (1), and a rotating cylinder (22) is coaxially connected to the rotating shaft (21). The rotating cylinder (22) is provided with a number of receiving plates (23) that can slide on the rotating cylinder (22), and each receiving plate (23) is provided with a number of elastic buckles (231) for snapping the corrugated pipe evenly in the circumferential direction. The inflation component (3) is provided with two sets and is respectively disposed at both ends of the corrugated pipe. Each inflation component (3) also includes an inflation head (31) that can reciprocate and be inserted into the corrugated pipe, and the inflation head (31) can reciprocate around the rotating shaft (21).

2. A helium leak detection device for stainless steel bellows for gas according to claim 1, characterized in that The inflation assembly (3) further includes a sleeve (37) sleeved on the rotating shaft (21), and a connecting rod (38) is fixedly connected to one end of the sleeve (37) near the receiving plate (23), and a telescopic drive (33) is connected to one end of the connecting rod (38). The output end of the telescopic drive (33) is connected to a moving rod (32), and the end of the moving rod (32) is connected to the inflation head (31). The inflation assembly (3) further includes a second rotating assembly (36) disposed outside the detection box (1) and used to drive the sleeve (37) to reciprocate.

3. A helium leak detection apparatus for stainless steel bellows for gas burners according to claim 2, characterized in that The interior of the moving rod (32) is hollow, and a sealing ring is provided at the position where the inflation head (31) contacts the bellows.

4. The helium leak detection apparatus for stainless steel bellows for gas according to claim 1, characterized by The inflation assembly (3) also includes an air tank (34) located outside the detection box (1). The air outlet of the air tank (34) is also equipped with a pressure gauge and a solenoid valve (341). The air outlet of the solenoid valve (341) is connected to a pipe (35), and one end of the pipe (35) is connected to the moving rod (32).

5. A helium leak detection device for a stainless steel corrugated pipe for gas supply according to claim 2, characterized in that... The second rotating assembly (36) includes a fourth pulley (363) sleeved on the end face of the sleeve (37) extending to the outside of the detection box (1). The second rotating assembly (36) also includes a second rotating drive (361) mounted on the outer wall of the detection box (1). The output end of the second rotating drive (361) is connected to a third pulley (362). The third pulley (362) and the fourth pulley (363) are connected by a belt.

6. The helium leak detection apparatus for stainless steel bellows for gas according to claim 1, characterized by The conversion component (2) also includes a slide groove (221) opened along the length of the rotating cylinder (22), and several slide grooves (221) are distributed on the rotating cylinder (22). The receiving plate (23) is also provided with a slider (232) that slides and engages with the slide groove (221).

7. A helium leak detection apparatus for stainless steel bellows for gas burners according to claim 6, characterized in that The conversion assembly (2) further includes a fixing bolt (233) rotatably disposed on the receiving plate (23) for fixing the receiving plate (23) on the rotating cylinder (22), and one end of the fixing bolt (233) can be inserted into the slide groove (221).

8. The helium leak detection apparatus for stainless steel bellows for gas according to claim 1, characterized by The conversion component (2) further includes a first rotating component (24) disposed outside the detection box (1) for driving the rotating cylinder (22) to rotate. The first rotating component (24) includes a second pulley (243) sleeved on the rotating shaft (21) and a first rotating drive (241) installed outside the detection box (1). The output end of the first rotating drive (241) is connected to a first pulley (242), and the first pulley (242) and the second pulley (243) are connected by a belt.

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