A device for testing the air tightness of an automobile exhaust pipe

Abstract

The application belongs to the technical field of automobile exhaust pipe detection, in particular to an automobile exhaust pipe air tightness testing device, which comprises two first circular plates arranged slidingly, the first circular plates are used for clamping two ends of the exhaust pipe, one side of each first circular plate is provided with a hose, the other end of the hose is connected with an air pump, the lower end of one side of each first circular plate is provided with a first water tank, the first water tank is filled with water, a metal removal assembly is arranged inside the first water tank, the metal removal assembly comprises a filter screen arranged inside the first water tank, one side of the first water tank is provided with a sliding overturning assembly, the sliding overturning assembly is used for driving the filter screen to slide and overturn in the first water tank, and the problem that the metal particles remaining in the first water tank block the holes on the surface of the exhaust pipe when the next round of exhaust pipe detection is performed, so that the existence of the holes cannot be detected, thereby affecting the detection result, is solved.

Description

Technical Field

[0001] This invention belongs to the field of automotive exhaust pipe testing technology, specifically a device for testing the air tightness of automotive exhaust pipes. Background Technology

[0002] The exhaust pipe is an essential device for treating vehicle exhaust and reducing noise. When the exhaust pipe leaks, its noise reduction effect will be reduced. After production, its sealing can be tested by an airtightness testing device.

[0003] A patent application with publication number CN113483954B discloses a water-immersion type automotive exhaust pipe air tightness testing device and method. The exhaust pipe is controlled by a first sealing block and a second sealing block. The water immersion testing method can achieve rapid detection of exhaust pipe air tightness, and even if leakage is found at the interface, it can be directly observed without significantly affecting the air tightness of the exhaust pipe itself. Furthermore, the electrical equipment of the device is located above the water immersion chamber, ensuring normal operation afterward.

[0004] In the aforementioned prior art, the exhaust pipe needs to be welded and polished before testing, which will cause metal particles to adhere to the surface of the exhaust pipe. When the exhaust pipe is placed in a water tank for testing, a large number of metal particles will mix with the water. During the next round of testing, the metal particles may enter the holes on the surface of the exhaust pipe in the next round of testing, blocking the holes and making it impossible to detect the existence of the holes, thus affecting the test results.

[0005] Therefore, the present invention provides a device for testing the air tightness of automobile exhaust pipes. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The automobile exhaust pipe air tightness testing device of the present invention includes two slidingly arranged first circular plates, the first circular plates are used to clamp both ends of the exhaust pipe, and a hose is respectively provided on one side of the first circular plates. The other end of the hose is connected to an air pump. A first water tank is provided at the lower end of one side of the two first circular plates. The first water tank is filled with water. A dirt removal component is provided inside the first water tank. The dirt removal component includes a filter screen provided inside the first water tank. A sliding flipping component is provided on one side of the first water tank. The sliding flipping component is used to drive the filter screen to slide and flip inside the first water tank.

[0008] Preferably, the lower end of the first water tank is provided with a base plate. The sliding flipping assembly includes racks fixed to both sides of the upper end of the filter screen. A second cylindrical rod is provided on one side of the rack. First rectangular blocks are fixed to both sides of the second cylindrical rod at the positions of the racks. The racks are slidably disposed in the middle of the first rectangular blocks. L-shaped support rods are rotatably provided at both ends of the second cylindrical rod. The L-shaped support rods are fixed to the upper end of the base plate. A third motor is provided at one end of the second cylindrical rod. The third motor is fixed to the base plate through the first support rod. A first cylindrical rod is provided at the upper end of the second cylindrical rod. The second cylindrical rod is connected to the first support rod through the first support rod. Two rectangular blocks are fixedly connected to a first cylindrical rod. L-shaped blocks are rotatably mounted at both ends of the first cylindrical rod. A second motor is mounted at one end of the first cylindrical rod. A rotating block is fixedly mounted on one side of the second motor. The rotating block is rotatably mounted on one side of a first support rod via a torsion spring. Arc-shaped blocks are fixedly mounted at both ends of one side of the L-shaped support rod. The L-shaped blocks are slidably mounted between the two arc-shaped blocks. A first gear is fixedly mounted on both sides of the first cylindrical rod at positions corresponding to the rack. A second gear is meshed on one side of each of the first gears. The second gear is rotatably mounted on one side of the L-shaped block via a pin shaft. The second gear meshes with the rack.

[0009] Preferably, an air inlet pipe passes through the middle of the first circular plate, and airbags are fixedly connected to opposite sides of the first circular plate. The air inlet pipe passes through the middle of the airbags, and a third circular plate is provided at the end of the air inlet pipe away from the airbags. The air inlet pipe passes through the middle of the third circular plate and is fixedly connected to an L-shaped pipe, which is connected to a flexible hose.

[0010] Preferably, the third circular plate is slidably disposed outside the air intake pipe, a cylindrical block is fixedly connected to the middle of the side of the first circular plate away from the third circular plate, the air intake pipe passes through the middle of the cylindrical block, the airbag covers the first circular plate and the cylindrical block on one side, a plurality of circular holes are respectively provided around the middle of the first circular plate, and circular tubes are fixedly connected to the positions of the circular holes on the side of the first circular plate away from the airbag, and a second circular plate is fixedly connected to the ends of the circular tubes away from the first circular plate, the circular tubes respectively pass through the second circular plate, the air intake pipe passes through the middle of the second circular plate, the edge of the second circular plate is fixedly connected to the third circular plate through the telescopic airbag, cylinders are fixedly connected to the four corners of the side of the third circular plate facing the second circular plate, and cylindrical strips are fixedly connected to the positions of the cylinders on the side of the second circular plate facing the third circular plate, the cylindrical strips are slidably disposed inside the cylinders, and the cylindrical strips are respectively connected to the inside of the cylinders through the first springs.

[0011] Preferably, the upper end of the third circular plate is fixedly connected to a first rectangular strip, the upper end of the two first rectangular strips is respectively provided with a second rectangular strip, the lower end of the second rectangular strip is fixedly connected to a U-shaped plate, the first rectangular strip is slidably disposed at the lower end of the U-shaped plate, a bidirectional lead screw is rotatably disposed in the middle of the U-shaped plate, the two sides of the bidirectional lead screw are respectively threaded to the first rectangular strip, one end of the bidirectional lead screw is fixedly connected to a first motor, and the first motor is fixedly connected to the second rectangular strip through a motor seat.

[0012] Preferably, a third rectangular bar is fixedly connected to the lower sides of both ends of the second rectangular bar, and a first rectangular tube is provided at the lower end of each of the third rectangular bars. The third rectangular bar is slidably disposed inside the first rectangular tube. A hydraulic cylinder is installed inside the first rectangular tube. A first electric slide is fixedly connected to the lower end of the first rectangular tube. A first electric slide rail is fixedly connected to the upper end of the base plate at the position corresponding to the first electric slide. The first electric slide is slidably disposed on the upper end of the first electric slide rail.

[0013] Preferably, the lower end of the hose is provided with a cylindrical wheel, and a sixth rectangular bar is rotatably provided on both sides of the cylindrical wheel. The lower end of the sixth rectangular bar is provided with a second rectangular tube. The sixth rectangular bar is slidably provided inside the second rectangular tube and is fixedly connected to the inside of the second rectangular tube by a second spring.

[0014] Preferably, a second water tank is provided on one side of the first water tank, a first rectangular plate is provided on the upper end of the second water tank, a plurality of nozzles are provided on the lower end of the first rectangular plate, and the two sides of the first rectangular plate are fixed to the base plate by second support rods.

[0015] Preferably, two fourth rectangular strips are provided on one side of the second water tank, and brushes are provided on the opposite sides of the two fourth rectangular strips.

[0016] Preferably, the fourth rectangular strip is fixed to a second rectangular plate via a fifth rectangular strip on the side away from the second water tank. A third support rod is fixed to the lower end of the second rectangular plate. A second electric slide is fixed to the lower end of the third support rod. A second electric slide rail is fixed to the upper end of the base plate at the position corresponding to the second electric slide. The second electric slide is slidably mounted on the upper end of the second electric slide rail.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The automobile exhaust pipe airtightness testing device of the present invention, by starting a second motor to drive a first cylindrical rod to rotate, the first cylindrical rod to drive a first gear to rotate, the first gear to drive a second gear to rotate, the second gear to drive a rack to move upward, the rack to drive a filter screen to slide upward from the first water tank, the filter screen to completely separate metal particles from the water in the first water tank, so that the filter screen is located at the upper end of the first water tank, then starting a third motor to drive a second cylindrical rod to rotate, the second cylindrical rod to drive the rack to rotate to one side through a first rectangular block, the rack to drive the filter screen to rotate 180 degrees to one side, the second cylindrical rod to drive the second rectangular block to rotate the rack to one side. The block drives the first cylindrical rod and the L-shaped block to rotate 180 degrees to one side, causing the L-shaped block to rotate 180 degrees between the arc-shaped blocks, maintaining rotational stability. This allows the filter screen to slide upwards, carrying out metal particles in the water. Then, it flips 180 degrees, causing the metal particles at the top of the filter screen to fall to one side. After each round of exhaust pipe testing, the metal particles in the first water tank are removed, ensuring that the water in the first water tank remains clean. This solves the problem that residual metal particles in the first water tank would block the holes on the surface of the exhaust pipe during the next round of exhaust pipe testing, making it impossible to detect the existence of the holes and thus affecting the test results.

[0019] 2. The automobile exhaust pipe air tightness testing device of the present invention, after the filter screen is rotated 180 degrees, so that the filter screen is located at the upper end of the second water tank, then the spray nozzle is driven to spray water to rinse the filter screen. At the same time, the second electric slide is driven to slide on the upper end of the second electric slide rail. The second electric slide is driven by the third support rod to slide the second rectangular plate towards the side closer to the second water tank. The second rectangular plate is driven by the fifth rectangular strip to slide the fourth rectangular strip towards the side of the second water tank. The fourth rectangular strip drives the brush to rub the upper and lower sides of the filter screen to prevent metal particles from getting stuck inside the filter screen. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the position of the bidirectional lead screw;

[0023] Figure 3 This is a diagram showing the location of the hose;

[0024] Figure 4 This is a schematic diagram of the airbag cross-section;

[0025] Figure 5 This is a schematic diagram of the cross-section of the first water tank;

[0026] Figure 6 This is a schematic diagram of the rack position;

[0027] Figure 7 This is a schematic diagram of the cylindrical wheel's position;

[0028] Figure 8 This is a diagram showing the nozzle positions;

[0029] In the diagram: 1. First circular plate; 11. Circular hole; 111. Cylindrical block; 12. Airbag; 13. Circular tube; 131. Second circular plate; 14. Telescopic airbag; 15. Third circular plate; 151. Cylinder; 152. First spring; 153. Cylindrical strip; 154. First rectangular strip; 16. L-shaped tube; 17. Second rectangular strip; 171. U-shaped plate; 172. Bidirectional lead screw; 173. First motor; 174. Third rectangular strip; 175. First rectangular cylinder; 176. First electric slide table; 177. First electric slide rail; 18. Air inlet pipe; 2. Hose; 21. Air pump; 22. Cylindrical wheel; 23. Sixth rectangular strip; 24. Second rectangular cylinder; 241. Second spring; 3. 31. First water tank; 32. Filter screen; 33. Rack; 34. First cylindrical rod; 35. First gear; 36. Second gear; 37. L-shaped block; 38. Second motor; 39. Second cylindrical rod; 30. First rectangular block; 31. L-shaped support rod; 32. Arc block; 33. Third motor; 34. Second rectangular block; 35. First support rod; 36. Rotating block; 47. Second water tank; 41. First rectangular plate; 41. Nozzle; 42. Second support rod; 58. Fourth rectangular bar; 59. Brush; 50. Fifth rectangular bar; 51. Second rectangular plate; 52. Third support rod; 53. Second electric slide table; 54. Second electric slide rail; 55. Base plate. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Example 1: As Figures 1-5 As shown in the embodiment of the present invention, an airtightness testing device for an automobile exhaust pipe includes two slidably arranged first circular plates 1. The first circular plates 1 are used to clamp both ends of the exhaust pipe. A hose 2 is respectively arranged on one side of the first circular plates 1, and the other end of the hose 2 is connected to an air pump 21. A first water tank 3 is arranged at the lower end of one side of the two first circular plates 1. The first water tank 3 is filled with water. A cleaning component is arranged inside the first water tank 3. The cleaning component includes a filter screen 31 arranged inside the first water tank 3. A sliding flipping component is arranged on one side of the first water tank 3. The sliding flipping component is used to drive the filter screen 31 to slide and flip inside the first water tank 3.

[0032] Specifically, before testing the exhaust pipe, it needs to be welded and ground, which will cause metal particles to adhere to the surface of the exhaust pipe. When the exhaust pipe is placed in a water tank for testing, a large number of metal particles will mix with the water. In the next round of testing, the metal particles may enter the holes on the surface of the exhaust pipe, blocking the holes and making it impossible to detect their existence, thus affecting the test results. When using this testing device, the exhaust pipe is placed between two first circular plates 1, and then the two first circular plates 1 are driven to move closer together, clamping the exhaust pipe and blocking both ends of the exhaust pipe. Then, the first circular plates 1 are driven to move the exhaust pipe into the first water tank 3 filled with water, so that the exhaust pipe is completely immersed in the water. Then, the air pump 21 is started, and air is injected into the exhaust pipe between the two first circular plates 1 through the hose 2. The results are then observed. Whether bubbles appear on the water surface determines the airtightness of the exhaust pipe. After testing an exhaust pipe, the sliding and flipping assembly is driven to move the filter screen 31 from the bottom of the first water tank 3 upwards, causing the filter screen 31 to separate the metal particles in the water in the first water tank 3, so that the metal particles are located at the top of the filter screen 31. The filter screen 31 then completely separates the metal particles from the water in the first water tank 3, keeping the filter screen 31 at the top of the first water tank 3. The filter screen 31 is then driven to flip 180 degrees at any time, causing the metal particles at the top of the filter screen 31 to fall to one side. After each round of exhaust pipe testing, the metal particles in the first water tank 3 are removed, keeping the water in the first water tank 3 clean at all times. This solves the problem that when the next round of exhaust pipe testing, the metal particles remaining in the first water tank 3 will block the holes on the surface of the exhaust pipe, making it impossible to detect the existence of the holes and thus affecting the test results.

[0033] like Figure 6As shown, a base plate 6 is provided at the lower end of the first water tank 3. The sliding tilting assembly includes racks 32 fixed to both sides of the upper end of the filter screen 31. A second cylindrical rod 34 is provided on one side of the rack 32. A first rectangular block 341 is fixed to both sides of the second cylindrical rod 34 at the position of the rack 32. The racks 32 are slidably disposed in the middle of the first rectangular blocks 341. L-shaped support rods 342 are rotatably provided at both ends of the second cylindrical rod 34. The L-shaped support rods 342 are fixed to the upper end of the base plate 6. A third motor 343 is provided at one end of the second cylindrical rod 34. The third motor 343 is fixed to the base plate 6 through the first support rod 35. A first cylindrical rod 33 is provided at the upper end of the second cylindrical rod 34. The second cylindrical rod 34 is connected to the first rectangular block 341 through the second rectangular block 341. A cylindrical rod 33 is fixedly connected. L-shaped blocks 333 are rotatably mounted at both ends of the first cylindrical rod 33. A second motor 334 is mounted at one end of the first cylindrical rod 33. A rotating block 351 is fixedly connected to one side of the second motor 334. The rotating block 351 is rotatably mounted on one side of the first support rod 35 via a torsion spring. Arc-shaped blocks 3421 are fixedly connected to both ends of one side of the L-shaped support rod 342. The L-shaped block 333 is slidably mounted between the two arc-shaped blocks 3421. A first gear 331 is fixedly connected to both sides of the first cylindrical rod 33 at positions corresponding to the rack 32. A second gear 332 is meshed on one side of the first gear 331. The second gear 332 is rotatably mounted on one side of the L-shaped block 333 via a pin shaft. The second gear 332 meshes with the rack 32.

[0034] Specifically, by starting the second motor 334, the first cylindrical rod 33 is driven to rotate. The first cylindrical rod 33 drives the first gear 331 to rotate. The rotation of the first gear 331 simultaneously drives the second gear 332 to rotate. The rotation of the second gear 332 simultaneously drives the rack 32 to move upward. The rack 32 drives the filter screen 31 to slide upward from inside the first water tank 3. The filter screen 31 completely separates the metal particles from the water in the first water tank 3, so that the filter screen 31 is located at the upper end of the first water tank 3. Then, the third motor 343 is started to drive the second cylindrical rod 34 to rotate. The second cylindrical rod 34 drives the rack 32 to rotate to one side via the first rectangular block 341. The rack 32 drives the filter screen 31 to rotate 180 degrees to one side. The second cylindrical rod 34 drives the first cylindrical rod 33 and the L-shaped block 333 to rotate 180 degrees to one side via the second rectangular block 344. The L-shaped block 333 rotates 180 degrees between the arc-shaped block 3421 to maintain rotational stability. This allows the filter screen 31 to slide upwards and carry out metal particles in the water. Then, it flips 180 degrees, causing the metal particles to fall from the top of the filter screen 31 onto one side of the first water tank 3.

[0035] like Figures 3-4As shown, an air inlet pipe 18 passes through the middle of the first circular plate 1. An airbag 12 is fixedly connected to the opposite side of the first circular plate 1. The air inlet pipe 18 passes through the middle of the airbag 12. A third circular plate 15 is provided at the end of the air inlet pipe 18 away from the airbag 12. The air inlet pipe 18 passes through the middle of the third circular plate 15 and is fixedly connected to an L-shaped pipe 16. The L-shaped pipe 16 is connected to the hose 2.

[0036] Specifically, by driving the third circular plate 15 to move closer to each other, the third circular plate 15 drives the first circular plate 1 to move closer to each other through the air intake pipe 18, so that the first circular plate 1 drives the airbag 12 to clamp the exhaust pipe, resulting in a better sealing effect at both ends of the exhaust pipe.

[0037] like Figure 4 As shown, the third circular plate 15 is slidably disposed outside the air intake pipe 18. A cylindrical block 111 is fixedly connected to the middle of the side of the first circular plate 1 away from the third circular plate 15. The air intake pipe 18 passes through the middle of the cylindrical block 111. The airbag 12 covers the first circular plate 1 and one side of the cylindrical block 111. Several circular holes 11 are respectively provided around the middle of the first circular plate 1. Circular tubes 13 are fixedly connected to the side of the first circular plate 1 away from the airbag 12 at the positions corresponding to the circular holes 11. Several circular tubes 13 are fixedly connected to a second circular plate 131 at the ends away from the first circular plate 1. The circular tubes 13 are divided into... The air intake pipe 18 passes through the middle of the second circular plate 131. The edge of the second circular plate 131 is fixed to the third circular plate 15 through the telescopic airbag 14. The four corners of the third circular plate 15 facing the second circular plate 131 are respectively fixed with cylinders 151. The position of the second circular plate 131 facing the third circular plate 15, corresponding to the position of the cylinders 151, is respectively fixed with cylindrical strips 153. The cylindrical strips 153 are slidably arranged inside the cylinders 151. The cylindrical strips 153 are respectively connected to the inside of the cylinders 151 through the first spring 152.

[0038] like Figure 2 As shown, a first rectangular strip 154 ​​is fixedly connected to the upper end of the third circular plate 15. A second rectangular strip 17 is set on the upper end of each of the two first rectangular strips 154. A U-shaped plate 171 is fixedly connected to the lower end of the second rectangular strip 17. The first rectangular strip 154 ​​is slidably set at the lower end of the U-shaped plate 171. A bidirectional lead screw 172 is rotatably set in the middle of the U-shaped plate 171. The two sides of the bidirectional lead screw 172 are threadedly connected to the first rectangular strip 154 ​​respectively. A first motor 173 is fixedly connected to one end of the bidirectional lead screw 172. The first motor 173 is fixedly connected to the second rectangular strip 17 through a motor base.

[0039] like Figure 2As shown, a third rectangular bar 174 is fixedly connected to the lower sides of both ends of the second rectangular bar 17. A first rectangular tube 175 is provided at the lower end of the third rectangular bar 174. The third rectangular bar 174 is slidably disposed inside the first rectangular tube 175. A hydraulic cylinder is installed inside the first rectangular tube 175. A first electric slide table 176 is fixedly connected to the lower end of the first rectangular tube 175. A first electric slide rail 177 is fixedly connected to the upper end of the base plate 6 at the position corresponding to the first electric slide table 176. The first electric slide table 176 is slidably disposed on the upper end of the first electric slide rail 177.

[0040] Specifically, by starting the first motor 173, the double-ended lead screw 172 is driven to rotate. Simultaneously, the rotation of the double-ended lead screw 172 causes the first rectangular bars 154 on both sides to move closer together. The first rectangular bars 154 cause the third circular plates 15 on both sides to move closer together. The third circular plates 15, through the intake pipe 18, cause the second circular plates 131 to move closer together. The second circular plates 131, through the circular pipe 13, cause the first circular plates 1 to move closer together. The first circular plates 1 cause the cylindrical block 111 to enter the exhaust pipe. The first circular plates 1 cause the airbag 12 to press tightly against both ends of the exhaust pipe. The cylindrical block 111 causes the airbag 12 to enter the exhaust pipe. After the first circular plates 1 are against both ends of the exhaust pipe, the third circular plates 15 continue to move closer together, causing the third circular plates 15 to slide towards the second circular plate 131 from the outside of the intake pipe 18. At the same time, the cylindrical bar 153 slides into the cylinder 151 and compresses the first spring 152. The telescopic airbag 14 is compressed, and the gas generated by the compression of the telescopic airbag 14 enters the airbag 12 through the round tube 13, inflating the airbag 12. The airbag 12 can support both ends of the exhaust pipe from the inside, resulting in a better sealing effect and preventing deformation of both ends of the exhaust pipe. After the exhaust pipe is compressed, the first electric slide table 176 is driven to slide on the upper end of the first electric slide rail 177. The first electric slide rail 177 drives the third rectangular bar 174 to slide towards the first water tank 3 through the first rectangular cylinder 175. The third rectangular bar 174 drives the exhaust pipe held at the lower end to move to the upper end of the first water tank 3 through the second rectangular bar 17. Then, the hydraulic cylinder in the first rectangular cylinder 175 is driven to make the third rectangular bar 174 slide downward. The third rectangular bar 174 drives the exhaust pipe held at the lower end to be completely immersed in the water in the first water tank 3 through the second rectangular bar 17.

[0041] like Figure 7 As shown, a cylindrical wheel 22 is provided at the lower end of the hose 2, and a sixth rectangular bar 23 is rotatably provided on both sides of the cylindrical wheel 22. A second rectangular tube 24 is provided at the lower end of the sixth rectangular bar 23. The sixth rectangular bar 23 is slidably provided inside the second rectangular tube 24. The sixth rectangular bar 23 is fixedly connected to the inside of the second rectangular tube 24 by the second spring 241.

[0042] Specifically, after the third circular plate 15 drives the first circular plate 1 to clamp the exhaust pipe, the third circular plate 15 is then driven to slide towards the first water tank 3. As it moves downward, the exhaust pipe is sent into the first water tank 3. During the movement, the hose 2 squeezes the cylindrical wheel 22. The cylindrical wheel 22 drives the sixth rectangular bar 23 to slide into the second rectangular cylinder 24 and squeezes the second spring 241. The cylindrical wheel 22 can support the hose 2.

[0043] Example 2: Figure 8 As shown in the first embodiment, another embodiment of the present invention is as follows: a second water tank 4 is provided on one side of the first water tank 3, a first rectangular plate 41 is provided on the upper end of the second water tank 4, a plurality of nozzles 411 are provided on the lower end of the first rectangular plate 41, and the two sides of the first rectangular plate 41 are fixedly connected to the base plate 6 by the second support rod 42.

[0044] like Figure 8 As shown, two fourth rectangular bars 5 are provided on one side of the second water tank 4, and brushes 51 are provided on the opposite side of the two fourth rectangular bars 5.

[0045] like Figure 8 As shown, the fourth rectangular strip 5 is fixed to the side away from the second water tank 4 via the fifth rectangular strip 52, and the lower end of the second rectangular strip 53 is fixed to the third support rod 54. The lower end of the third support rod 54 is fixed to the second electric slide table 55. The upper end of the base plate 6 is fixed to the second electric slide table 55 at the position corresponding to the second electric slide table 55. The second electric slide table 55 is slidably mounted on the upper end of the second electric slide table 56.

[0046] Specifically, after the filter screen 31 is rotated 180 degrees, it is positioned at the top of the second water tank 4. Then, the spray nozzle 411 sprays water to rinse the filter screen 31. At the same time, the second electric slide 55 is driven to slide on the top of the second electric slide rail 56. The second electric slide 55 drives the second rectangular plate 53 to slide closer to the second water tank 4 via the third support rod 54. The second rectangular plate 53 drives the fourth rectangular strip 5 to slide towards the second water tank 4 via the fifth rectangular strip 52. The fourth rectangular strip 5 drives the brush 51 to rub the upper and lower sides of the filter screen 31 to prevent metal particles from getting stuck inside the filter screen 31.

[0047] Working principle: The exhaust pipe is placed between two first circular plates 1. The first motor 173 drives the double-acting screw 172 to rotate. Simultaneously, the rotation of the double-acting screw 172 causes the first rectangular bars 154 on both sides to move closer together. The first rectangular bars 154 then cause the third circular plates 15 on both sides to move closer together. The third circular plates 15, through the intake pipe 18, cause the second circular plates 131 to move closer together. The second circular plates 131, through the circular tube 13, cause the first circular plates 1 to move closer together. The first circular plates 1 cause the cylindrical block 111 to enter the exhaust pipe. The first circular plates 1 cause the airbag 12 to press tightly against both ends of the exhaust pipe. The cylindrical block 111 then causes the airbag 12 to enter the exhaust pipe. After the first circular plates 1 are against both ends of the exhaust pipe, the third circular plates 15 continue to move closer together, causing them to slide from the outside of the intake pipe 18 towards the side closer to the second circular plate 131. Simultaneously, the cylindrical bar 153 slides into the cylinder 151, compressing the first spring 152 and squeezing the telescopic airbag 14. The gas generated by the pressure enters the airbag 12 through the round tube 13, inflating the airbag 12. The airbag 12 can support both ends of the exhaust pipe from the inside, resulting in a better sealing effect and preventing the exhaust pipe from being squeezed and deformed. After the exhaust pipe is squeezed, the first electric slide table 176 is driven to slide on the upper end of the first electric slide rail 177. The first electric slide rail 177 drives the third rectangular bar 174 to slide towards the first water tank 3 through the first rectangular cylinder 175. The third rectangular bar 174 drives the exhaust pipe clamped at the lower end to move to the upper end of the first water tank 3 through the second rectangular bar 17. Then, the hydraulic cylinder in the first rectangular cylinder 175 is driven to make the third rectangular bar 174 slide downward. The third rectangular bar 174 drives the exhaust pipe clamped at the lower end to be completely immersed in the water in the first water tank 3 through the second rectangular bar 17. Then, the air pump 21 is started, and the exhaust pipe between the two first round plates 1 is inflated through the hose 2. The sealing performance of the exhaust pipe is judged by observing whether the water surface is clear.

[0048] After testing an exhaust pipe, the second motor 334 is activated to rotate the first cylindrical rod 33. The first cylindrical rod 33 rotates the first gear 331, which in turn rotates the second gear 332. The second gear 332 rotates the rack 32, which moves it upwards. The rack 32 causes the filter screen 31 to slide upwards from the first water tank 3, completely separating metal particles from the water in the first water tank 3, positioning the filter screen 31 at the top of the first water tank 3. Then, the third motor 343 is activated to rotate the second cylindrical rod 34. The second cylindrical rod 34, through the first rectangular block 341, rotates the rack 32 to one side. The rack 32 causes the filter screen 31 to rotate 180 degrees to one side. The second cylindrical rod 34, through the second rectangular block 344, rotates the first cylindrical rod 33... 3. The L-shaped block 333 rotates 180 degrees to one side, so that the L-shaped block 333 rotates 180 degrees between the arc-shaped blocks 3421, maintaining the stability of the rotation, so that the filter screen 31 slides upward to carry out the metal particles in the water. Then it flips 180 degrees so that the filter screen 31 is located at the upper end of the second water tank 4. Then the spray nozzle 411 is driven to spray water to rinse the filter screen 31. At the same time, the second electric slide table 55 is driven to slide on the upper end of the second electric slide rail 56. The second electric slide table 55 drives the second rectangular plate 53 to slide closer to the second water tank 4 through the third support rod 54. The second rectangular plate 53 drives the fourth rectangular bar 5 to slide to one side of the second water tank 4 through the fifth rectangular bar 52. The fourth rectangular bar 5 drives the brush 51 to rub the upper and lower sides of the filter screen 31 to prevent metal particles from getting stuck inside the filter screen 31.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A kind of automobile exhaust pipe air tightness testing device, including two slidingly arranged first circular plate (1), the first circular plate (1) is used to clamp exhaust pipe two ends, the first circular plate (1) one side is provided with hose (2) respectively, the other end of the hose (2) is connected with air pump (21), the lower end of the first circular plate (1) one side is provided with first water tank (3), the first water tank (3) is equipped with water, the first water tank (3) is provided with impurity removal component in, it is characterized in that: The impurity removing assembly comprises a filter screen (31) arranged in a first water tank (3), and a sliding and overturning assembly arranged on one side of the first water tank (3) and used for driving the filter screen (31) to slide and overturn in the first water tank (3). The lower end of the first water tank (3) is provided with a bottom plate (6), the sliding and overturning assembly comprises two rack gears (32) respectively fixed on the upper end of the filter screen (31) and on both sides of the filter screen (31), one side of each rack gear (32) is provided with a second cylindrical rod (34), the first rectangular block (341) is fixed on the position of the rack gear (32) on both sides of the second cylindrical rod (34), the rack gear (32) is slidingly arranged in the middle of the first rectangular block (341), the L-shaped support rod (342) is rotatably arranged at the two ends of the second cylindrical rod (34), the L-shaped support rod (342) is fixed on the upper end of the bottom plate (6), the third motor (343) is arranged at one end of the second cylindrical rod (34), the third motor (343) is fixed on the bottom plate (6) through the first support rod (35), the first cylindrical rod (33) is arranged on the upper end of the second cylindrical rod (34), the second cylindrical rod (34) is fixed on the first cylindrical rod (33) through the second rectangular block (344), the L-shaped block (333) is rotatably arranged at the two ends of the first cylindrical rod (33), the second motor (334) is arranged at one end of the first cylindrical rod (33), the rotating block (351) is fixed on one side of the second motor (334), the rotating block (351) is rotatably arranged on one side of the first support rod (35) through the torsional spring, the arc-shaped blocks (3421) are fixed on the two ends of one side of the L-shaped support rod (342), the L-shaped block (333) is slidingly arranged between the two arc-shaped blocks (3421), the first gear (331) is fixed on the position of the rack gear (32) on both sides of the first cylindrical rod (33), the second gear (332) is rotatably arranged on one side of the L-shaped block (333) through the pin shaft, and the second gear (332) is meshed with the rack gear (32).

2. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 1, characterized in that: The middle of the first circular plate (1) is provided with an air inlet pipe (18), the air bags (12) are fixed on the opposite sides of the first circular plate (1), the air inlet pipe (18) penetrates the middle of the air bag (12), the third circular plate (15) is arranged at the end of the air inlet pipe (18) away from the air bag (12), the L-shaped pipe (16) is arranged in the middle of the third circular plate (15) and fixed on the air inlet pipe (18), and the L-shaped pipe (16) is connected with the hose (2).

3. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 2, characterized in that: The third circular plate (15) is slidingly arranged outside the air inlet pipe (18), the first circular plate (1) is fixedly connected with a cylindrical block (111) at the middle of the side away from the third circular plate (15), the air inlet pipe (18) penetrates the middle of the cylindrical block (111), the air bag (12) is wrapped on the side of the first circular plate (1) and the cylindrical block (111), a plurality of circular holes (11) are arranged around the middle of the first circular plate (1), a circular tube (13) is fixedly connected at the position corresponding to the circular hole (11) on the side away from the air bag (12) of the first circular plate (1), a plurality of the circular tubes (13) are fixedly connected at the ends away from the first circular plate (1) to form a second circular plate (131), the circular tubes (13) penetrate the second circular plate (131) respectively, the air inlet pipe (18) penetrates the middle of the second circular plate (131), the second circular plate (131) is fixedly connected with the third circular plate (15) through the stretchable air bag (14), the third circular plate (15) is fixedly connected with a cylinder (151) at each of the four corners of the side facing the second circular plate (131), the second circular plate (131) is fixedly connected with a cylindrical bar (153) at the position corresponding to the cylinder (151) of the side facing the third circular plate (15), the cylindrical bar (153) is slidingly arranged in the cylinder (151) respectively, and the cylindrical bar (153) is connected with the cylinder (151) through the first spring (152) respectively.

4. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 3, characterized in that: The first rectangular bar (154) is slidingly arranged at the lower end of the U-shaped plate (171), and the U-shaped plate (171) is rotatably provided with a bidirectional screw rod (172) at the middle thereof, the two sides of the bidirectional screw rod (172) are threadedly connected with the first rectangular bar (154) respectively, one end of the bidirectional screw rod (172) is fixedly connected with a first motor (173), and the first motor (173) is fixedly connected with the second rectangular bar (17) through a motor base.

5. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 4, characterized in that: The third rectangular bar (174) is slidingly arranged in the first rectangular cylinder (175), and the first rectangular cylinder (175) is internally provided with a hydraulic cylinder, the lower end of the first rectangular cylinder (175) is fixedly connected with a first electric sliding table (176), and the upper end of the bottom plate (6) is fixedly connected with a first electric sliding rail (177) at the position corresponding to the first electric sliding table (176), and the first electric sliding table (176) is slidingly arranged on the upper end of the first electric sliding rail (177).

6. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 5, characterized in that: The lower end of the hose (2) is respectively provided with a cylindrical wheel (22), the two sides of the cylindrical wheel (22) are respectively rotationally provided with a sixth rectangular strip (23), the lower end of the sixth rectangular strip (23) is respectively provided with a second rectangular cylinder (24), the sixth rectangular strip (23) is respectively slidably arranged in the second rectangular cylinder (24), and the sixth rectangular strip (23) is respectively fixedly connected with the inside of the second rectangular cylinder (24) through a second spring (241).

7. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 1, characterized in that: The first water tank (3) is provided with a second water tank (4) on one side, the upper end of the second water tank (4) is provided with a first rectangular plate (41), the lower end of the first rectangular plate (41) is provided with a plurality of spray heads (411), and the two sides of the first rectangular plate (41) are fixedly connected with the bottom plate (6) through a second supporting rod (42).

8. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 7, characterized in that: The second water tank (4) is provided with two fourth rectangular strips (5) on one side, and the opposite sides of the two fourth rectangular strips (5) are respectively provided with brushes (51).

9. The device for testing the air tightness of an exhaust pipe of a vehicle according to claim 8, characterized in that: The fourth rectangular strip (5) is fixedly connected with a second rectangular plate (53) through a fifth rectangular strip (52) away from the second water tank (4) on one side, the lower end of the second rectangular plate (53) is fixedly connected with a third supporting rod (54), the lower end of the third supporting rod (54) is fixedly connected with a second electric sliding table (55), the upper end of the bottom plate (6) is fixedly connected with a second electric sliding rail (56) corresponding to the position of the second electric sliding table (55), and the second electric sliding table (55) is slidably arranged on the upper end of the second electric sliding rail (56).

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