Turbocharger shell air tightness detection equipment

Abstract

The invention relates to the technical field of turbocharger detection, and discloses turbocharger shell air tightness detection equipment which comprises a machine body, a video recording device is installed on the machine body, a water tank is fixed to the machine body, a partition plate is fixed in the water tank, a sliding opening is formed in the side face of the water tank, the sliding opening is located below the partition plate, and the sliding opening is located below the partition plate. A fixing frame is fixed to the machine body, an air cylinder is installed on the machine body, a downward pressing piece is arranged below the fixing frame, a positioning piece is arranged above the water tank, and the water tank is made of transparent materials and right faces the video recording device. According to the method, the water removal treatment on the turbocharger shell after detection is realized, the trouble that additional working procedures are needed for water removal subsequently is avoided, and the time and the cost are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of turbocharger detection, and particularly to an airtightness detection device for a turbocharger housing. Background Art

[0002] An airtightness detection device for a turbocharger housing is a special device for detecting the sealing performance of a turbocharger housing.

[0003] After retrieval, a Chinese patent with the publication number CN107525636A discloses an airtightness detection device for a cooling cavity of a turbocharger intermediate body, including a frame. An installation plate is provided on the frame. A linear guide rail is provided on the installation plate. A tray moving along the direction of the linear guide rail is provided on the linear guide rail. An active positioning mechanism and an auxiliary positioning mechanism are respectively provided at both ends of the linear guide rail. A sealing mechanism cooperating with the water outlet of the intermediate body is provided on the side of the tray. The active positioning mechanism includes a positioning cylinder. The positioning cylinder is provided with an active positioning block driven by the positioning cylinder to move along the direction of the linear guide rail. A sealing pipe facing the water inlet of the intermediate body is provided on the side of the active positioning block facing the tray. The above solution is more convenient to use because the connection between the sealing pipe and the water inlet is completed while positioning the intermediate body. However, when the above solution is used, there are still the following deficiencies: The above solution for the airtightness detection device of the turbocharger housing has significant drawbacks. Due to the lack of a function for removing water from the turbocharger after detection, a large amount of water remains on the surface of the turbocharger due to being immersed in water during the detection process. This makes it necessary to add additional processes to carry out water removal and drying treatment on the turbocharger subsequently. This not only prolongs the time of the entire detection and production process, reduces production efficiency, but also increases the labor and material costs.

[0004] Therefore, it is necessary to design an airtightness detection device for a turbocharger housing to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose an airtightness detection device for a turbocharger housing.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: An airtightness detection device for a turbocharger housing, including a body. A video recording device is installed on the body. A water tank is fixed on the body. A partition is fixed inside the water tank. A sliding opening is provided on the side of the water tank, and the sliding opening is located below the partition. A fixing frame is fixed on the body. A cylinder is installed on the body. A pressing member is provided below the fixing frame. A positioning member is provided above the water tank. The water tank is made of a transparent material and is arranged facing the video recording device; Among them, the pressing member is connected to the telescopic end of the cylinder through a first connecting component; Among them, the positioning member is connected to the inner bottom surface of the water tank through a second connecting component; Among them, a driving unit is arranged inside the water tank, and the driving unit is used to drive the positioning member to rotate. The driving unit is located below the partition, and the driving unit includes a driving component and a transmission component; Among them, a water blocking component is arranged above the water tank to prevent water from splashing.

[0007] As a preferred technical solution of the present invention, the first connecting component includes a connecting plate and a vertical rod. Two holes are provided on the connecting plate. The telescopic end of the cylinder extends into one of the holes and is fixed in the hole. The vertical rod is rotatably installed in the other hole. The inside of the vertical rod is hollow, and the vertical rod is communicated with the pressing member. A rotary joint is installed at the top end of the vertical rod.

[0008] As a preferred technical solution of the present invention, the second connecting component includes an outer cylinder and a sliding rod. The outer cylinder is rotatably installed on the inner bottom surface of the water tank. The outer cylinder passes through the partition and is rotatably connected to the partition. The sliding rod is slidably arranged in the outer cylinder. The top end of the sliding rod extends to the outside of the outer cylinder and is fixedly connected to the positioning member. The outer cylinder and the sliding rod are connected by a first spring. The inner circle of the cross section of the outer cylinder and the cross section of the sliding rod are both rectangular structures.

[0009] As a preferred technical solution of the present invention, the outer cylinder, the inner rod, the positioning member, the pressing member and the vertical rod are coaxially arranged.

[0010] As a preferred technical solution of the present invention, the driving component includes an electric push cylinder, a cross plate, a threaded rod, a moving seat and a rack. The electric push cylinder is installed inside the water tank. The cross plate is fixed to the telescopic end of the electric push cylinder. The threaded rod is installed on the side of the cross plate through two bearing seats. The moving seat is threadedly sleeved on the threaded rod. The rack is fixed to the side of the moving seat. A fixed rod is fixed at the end of the threaded rod. The end of the fixed rod away from the threaded rod passes through the sliding opening and extends to the outside of the water tank.

[0011] As a preferred technical solution of the present invention, the transmission component includes a first gear, a rotating shaft, a second gear, a third gear and a fourth gear. The first gear and the fourth gear are both fixedly sleeved on the outer cylinder. The rotating shaft is rotatably installed on the inner bottom surface of the water tank. The second gear and the third gear are both fixedly sleeved on the rotating shaft. The third gear and the fourth gear are meshed with each other.

[0012] As a preferred technical solution of the present invention, the water retaining assembly includes a water retaining cylinder, a rotating door and a mounting plate. One end of the mounting plate is fixedly connected to the machine body, and the other end is fixedly connected to the water retaining cylinder. The water retaining cylinder is located directly above the water tank. The rotating door is rotatably mounted on the water retaining cylinder, and the rotating door and the water retaining cylinder together form a cylindrical structure.

[0013] As a preferred technical solution of the present invention, several jet pipes are fixed inside the water retaining cylinder. A plurality of jet holes are formed in each jet pipe. Adjacent two jet pipes are connected and communicated through a connecting pipe. An air supply assembly is arranged inside the water tank, and the air supply assembly is located below the partition plate.

[0014] As a preferred technical solution of the present invention, the air supply assembly includes a sealing cylinder, a sliding plug, a connecting rod and an air supply pipe. The sealing cylinder is fixed inside the water tank. The sliding plug is hermetically slidably connected inside the sealing cylinder. One end of the connecting rod is connected to the sliding plug, and the other end extends to the outside of the sealing cylinder. The sliding plug and the sealing cylinder are connected by a second spring. One end of the air supply pipe is communicated with the sealing cylinder, and the other end is communicated with one of the jet pipes.

[0015] As a preferred technical solution of the present invention, a slidable water scraping ring is arranged inside the water retaining cylinder, and the outer edge of the water scraping ring is fitted with the inner surface of the water retaining cylinder. A plurality of avoiding grooves are formed in the water scraping ring. A plurality of jet pipes respectively pass through the plurality of avoiding grooves. A push rod is fixed on the water scraping ring. The push rod passes through the fixing frame and is slidably connected with the fixing frame. One end of the push rod located above the fixing frame is fixed with a sleeve plate, and the sleeve plate and the fixing frame are connected by a third spring.

[0016] The present invention has the following beneficial effects: 1. After the test is completed, by rotating the handwheel to make the rack face the second gear, and then starting the electric push cylinder again to drive the turbocharger housing to rotate at a high speed, the residual water on its surface is thrown off, realizing the water treatment of the turbocharger housing after detection, avoiding the trouble of additional water removal procedures in the follow-up, and saving time and cost; 2. During the test process, the electric push cylinder drives the rack to move, driving the first gear to rotate, and then making the turbocharger housing between the positioning member and the pressing member rotate slowly. At the same time, the video recording device is used to take pictures of the turbocharger housing in the water from all directions, which is convenient for the staff to accurately find the leakage point and improves the accuracy and efficiency of detection; 3. During the high-speed water throwing and water removal process of the turbocharger housing, the water retaining cylinder can prevent water from splashing. At the same time, when the rack drives the second gear to rotate, it will also push the connecting rod to move the sliding plug, press the gas in the sealing cylinder into the jet pipe and spray it out through the jet holes, blowing the water on the surface of the turbocharger housing. Cooperating with the centrifugal water throwing action, the water removal effect is greatly improved; 4. After the detection work is completed, the staff can press down the push rod to drive the wiper ring to move downward, scraping off the residual moisture adhering to the inner surface of the water retaining cylinder, avoiding the dripping of residual moisture on the rotating door during subsequent detection, and ensuring the cleanliness of the detection environment and the normal use of the equipment. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the airtightness detection equipment for the turbocharger housing proposed by the present invention; Figure 2 It is a schematic structural diagram of the fixing frame and the water tank; Figure 3 It is a schematic sectional view of the fixing frame and the water tank; Figure 4 It is a schematic structural diagram of the water retaining assembly; Figure 5 It is a schematic structural diagram when the rotating door is opened; Figure 6 It is a schematic structural diagram of the driving unit; Figure 7 It is a schematic sectional view of the water tank Figure 1 ; Figure 8 It is a schematic sectional view of the water tank Figure 2 ; Figure 9 It is Figure 3 an enlarged view of the structure at position A of Figure 10 It is Figure 6 an enlarged view of the structure at position B of

[0018] In the figure: 11, body; 12, video recording device; 13, water tank; 131, partition; 132, sliding opening; 14, fixing frame; 15, cylinder; 16, pressing member; 17, positioning member; 21, connecting plate; 22, vertical rod; 23, rotary joint; 31, outer cylinder; 32, sliding rod; 33, first spring; 41, electric push cylinder; 42, cross plate; 43, threaded rod; 44, moving seat; 45, rack; 46, fixed rod; 47, first gear; 48, rotating shaft; 49, second gear; 410, third gear; 411, fourth gear; 51, water retaining cylinder; 52, rotating door; 53, mounting plate; 61, air injection pipe; 62, air injection hole; 63, connecting pipe; 64, sealing cylinder; 65, sliding plug; 66, connecting rod; 67, second spring; 68, air supply pipe; 71, wiper ring; 72, push rod; 73, sleeve plate; 74, third spring. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Referring to Figures 1 - 10 , a turbocharger housing airtightness detection device includes a body 11, a video recording device 12 is installed on the body 11, a water tank 13 is fixed on the body 11, a partition 131 is fixed inside the water tank 13, a sliding opening 132 is formed on the side of the water tank 13, the sliding opening 132 is located below the partition 131, a fixing frame 14 is fixed on the body 11, a cylinder 15 is installed on the body 11, a pressing member 16 is arranged below the fixing frame 14, a positioning member 17 is arranged above the water tank 13, the water tank 13 is made of a transparent material, and the water tank 13 is arranged opposite to the video recording device 12; The pressing member 16 is connected to the telescopic end of the cylinder 15 through a first connection assembly. The first connection assembly includes a connecting plate 21 and a vertical rod 22. Two holes are formed in the connecting plate 21. The telescopic end of the cylinder 15 extends into one of the holes and is fixed in the hole. The vertical rod 22 is rotatably installed in the other hole. The vertical rod 22 is hollow inside, and the vertical rod 22 is communicated with the pressing member 16. A rotary joint 23 is installed at the top of the vertical rod 22; The positioning member 17 is connected to the inner bottom surface of the water tank 13 through a second connection assembly. The second connection assembly includes an outer cylinder 31 and a sliding rod 32. The outer cylinder 31 is rotatably installed on the inner bottom surface of the water tank 13. The outer cylinder 31 passes through the partition 131 and is rotatably connected to the partition 131. The sliding rod 32 is slidably arranged in the outer cylinder 31. The top end of the sliding rod 32 extends to the outside of the outer cylinder 31 and is fixed to the positioning member 17. The outer cylinder 31 and the sliding rod 32 are connected by a first spring 33. The inner circle of the cross section of the outer cylinder 31 and the cross section of the sliding rod 32 are both rectangular structures. The outer cylinder 31, the inner rod, the positioning member 17, the pressing member 16 and the vertical rod 22 are coaxially arranged; When the airtightness detection device for the turbocharger housing proposed by the present invention is in use, the staff opens the rotating door 52, places the turbocharger housing to be detected on the positioning member 17, then closes the rotating door 52, and starts the cylinder 15. When the cylinder 15 operates, it can drive the connecting plate 21 to move downward, so that the connecting plate 21 drives the vertical rod 22 to move downward. When the vertical rod 22 moves downward, the pressing member 16 moves downward accordingly and presses the turbocharger housing. At this time, the positioning member 17 and the pressing member 16 jointly play a role in sealing and fixing the turbocharger housing. It should be noted that the specific structures and working principles of the positioning member 17 and the pressing member 16 are prior arts, and the implementation methods adopt conventional means, which are not shown in the figure and will not be elaborated here. Further, as the telescopic end of the cylinder 15 extends, the pressing member 16 will drive the turbocharger housing to move downward until the turbocharger housing is immersed in water. At the same time, the positioning member 17 and the sliding rod 32 will also move downward, so that the sliding rod 32 extends into the inner part of the outer cylinder 31. When the turbocharger housing is completely immersed in water, the staff supplies air to the pressing member 16 through the vertical rod 22, so that the gas is filled into the turbocharger housing. If there is a leakage point in the turbocharger housing, the gas will escape upward in the form of bubbles on the water surface. Therefore, the staff can judge the airtightness of the turbocharger housing by observing whether there are bubbles in the water; A driving unit is arranged inside the water tank 13. The driving unit is used to drive the positioning member 17 to rotate, and the driving unit is located below the partition plate 131. The driving unit includes a driving component and a transmission component. The driving component includes an electric push cylinder 41, a cross plate 42, a threaded rod 43, a moving seat 44 and a rack 45. The electric push cylinder 41 is installed inside the water tank 13, the cross plate 42 is fixed on the telescopic end of the electric push cylinder 41, the threaded rod 43 is installed on the side surface of the cross plate 42 through two bearing seats, the moving seat 44 is threadedly sleeved on the threaded rod 43, the rack 45 is fixed on the side surface of the moving seat 44, a fixing rod 46 is fixed at the end of the threaded rod 43, and the end of the fixing rod 46 away from the threaded rod 43 passes through the sliding port 132 and extends to the outside of the water tank 13. The transmission component includes a first gear 47, a rotating shaft 48, a second gear 49, a third gear 410 and a fourth gear 411. The first gear 47 and the fourth gear 411 are both fixedly sleeved on the outer cylinder 31, the rotating shaft 48 is rotatably installed on the inner bottom surface of the water tank 13, the second gear 49 and the third gear 410 are both fixedly sleeved on the rotating shaft 48, and the third gear 410 and the fourth gear 411 are meshed with each other; In the initial state, the rack 45 is arranged opposite to the first gear 47. During the test, the staff starts the electric push cylinder 41 to drive the cross plate 42 to move. When the cross plate 42 moves, the moving seat 44 and the rack 45 move accordingly. During the movement of the rack 45, it will mesh with the first gear 47 and drive the first gear 47 to rotate. When the first gear 47 rotates, it can drive the outer cylinder 31 to rotate. Since the inner circle of the cross-section of the outer cylinder 31 and the cross-section of the slide bar 32 are both rectangular structures, when the outer cylinder 31 rotates, it can drive the positioning member 17 to rotate through the slide bar 32, and finally make the turbocharger housing between the positioning member 17 and the pressing member 16 rotate slowly. In addition, a video recording device 12 is installed on the machine body 11. During the test, the staff can record the test process through the video recording device 12. During the slow rotation of the turbocharger housing, the video recording device 12 can take pictures of the turbocharger housing in the water from all directions, so that the staff can accurately find the leakage point of the turbocharger housing; After the test is completed, the staff controls the telescopic end of the cylinder 15 to retract. During this process, the turbocharger housing will move upward and reset under the elastic force of the first spring 33 until the turbocharger housing is separated from the water. At the same time, the staff also needs to control the telescopic end of the electric push cylinder 41 to reset. When the turbocharger housing and the electric push cylinder 41 are reset, the staff rotates the hand wheel to drive the fixed rod 46 to rotate. When the fixed rod 46 rotates, it will drive the threaded rod 43 to rotate, so that the threaded rod 43 drives the moving seat 44 to move. When the moving seat 44 moves, the rack 45 moves accordingly. When the moving seat 44 moves to the end position of the cross plate 42, the moving seat 44 cannot move any further. At this time, the rack 45 just moves to the position opposite to the second gear 49, so as to facilitate the subsequent water treatment of the turbocharger housing; When dewatering the turbocharger housing, the staff starts the electric push cylinder 41 again to drive the cross plate 42 to drive the rack 45 to move. Since the rack 45 is located opposite to the second gear 49, when the rack 45 moves, it will mesh with the second gear 49 and drive the second gear 49 to rotate, as Figure 7 and Figure 8As shown, when the second gear 49 rotates, it drives the rotation of the rotating shaft 48. The rotation of the rotating shaft 48 is transmitted to the outer cylinder 31 through the meshing of the third gear 410 and the fourth gear 411, causing the outer cylinder 31 to drive the turbocharger housing to rotate again. It is worth mentioning that the transmission between the third gear 410 and the fourth gear 411 can accelerate the rotation speed of the rotating shaft 48, enabling the outer cylinder 31 to drive the turbocharger housing to rotate at a high speed. During the high-speed rotation of the turbocharger housing, the moisture remaining on its surface can be thrown off, which serves to remove water from the turbocharger housing. Therefore, the turbocharger housing airtightness detection device proposed by the present invention not only has the function of detecting airtightness, but also has the function of removing water from the turbocharger housing after detection; A water-blocking component is provided above the water tank 13 to prevent water from splashing. The water-blocking component includes a water-blocking cylinder 51, a rotating door 52, and a mounting plate 53. One end of the mounting plate 53 is fixedly connected to the machine body 11, and the other end is fixedly connected to the water-blocking cylinder 51. The water-blocking cylinder 51 is located directly above the water tank 13. The rotating door 52 is rotatably mounted on the water-blocking cylinder 51, and the rotating door 52 and the water-blocking cylinder 51 together form a cylindrical structure; A number of air spray pipes 61 are fixed inside the water-blocking cylinder 51. A number of air spray holes 62 are formed in each air spray pipe 61. Adjacent two air spray pipes 61 are connected to each other through a communication pipe 63. An air supply component is provided inside the water tank 13, and the air supply component is located below the partition plate 131. The air supply component includes a sealing cylinder 64, a sliding plug 65, a connecting rod 66, and an air supply pipe 68. The sealing cylinder 64 is fixed inside the water tank 13. The sliding plug 65 is hermetically and slidably connected inside the sealing cylinder 64. One end of the connecting rod 66 is connected to the sliding plug 65, and the other end extends outside the sealing cylinder 64. A second spring 67 is connected between the sliding plug 65 and the sealing cylinder 64. One end of the air supply pipe 68 is connected to the sealing cylinder 64, and the other end is connected to one of the air spray pipes 61; During the water removal process, since the turbocharger housing is located inside the water-blocking cylinder 51, the moisture on the surface of the turbocharger housing will be thrown onto the inner surface of the water-blocking cylinder 51. The design of the water-blocking cylinder 51 can prevent water from splashing. To improve the water removal effect on the turbocharger housing, a number of air spray pipes 61 are also provided inside the water-blocking cylinder 51. A number of air spray holes 62 are formed in each air spray pipe 61. When the rack 45 drives the second gear 49 to rotate, the rack 45 will also push the connecting rod 66, causing the connecting rod 66 to drive the sliding plug 65 to move. When the sliding plug 65 moves, it can press the gas in the sealing cylinder 64 into the corresponding air spray pipe 61 through the communication pipe 63, enabling the gas to be ejected through a number of air spray holes 62. The gas ejected from a number of air spray holes 62 can blow off the moisture on the surface of the turbocharger housing. At the same time, in cooperation with the centrifugal water throwing action of the turbocharger housing, the water removal effect on the turbocharger housing can be improved; Inside the water baffle cylinder 51, a slidable water scraping ring 71 is provided, and the outer edge of the water scraping ring 71 is in contact with the inner surface of the water baffle cylinder 51. A number of avoidance grooves are formed on the water scraping ring 71, and a number of air injection pipes 61 respectively pass through the number of avoidance grooves. A push rod 72 is fixed on the water scraping ring 71. The push rod 72 passes through the fixing frame 14 and is slidably connected with the fixing frame 14. A sleeve plate 73 is fixed at one end of the push rod 72 above the fixing frame 14, and the sleeve plate 73 is connected with the fixing frame 14 through a third spring 74; For the water baffle cylinder 51, after the detection work is completed, the staff can press down the push rod 72 to drive the water scraping ring 71 to move downward. When the water scraping ring 71 moves downward, it can scrape off the residual water attached to the inner surface of the water baffle cylinder 51, playing a role in removing the water on the inner surface of the water baffle cylinder 51. Through this design, it is possible to avoid the phenomenon that the residual water on the rotating door 52 drips everywhere during the subsequent detection of the turbocharger housing.

[0021] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Turbocharger housing airtightness detection equipment, characterized in that It includes a body (11) on which a video recording device (12) is installed, a water tank (13) is fixed on the body (11), a partition (131) is fixed inside the water tank (13), a sliding opening (132) is formed on the side surface of the water tank (13), the sliding opening (132) is located below the partition (131), a fixing frame (14) is fixed on the body (11), a cylinder (15) is installed on the body (11), a pressing member (16) is arranged below the fixing frame (14), a positioning member (17) is arranged above the water tank (13), the water tank (13) is made of a transparent material, and the water tank (13) is arranged opposite to the video recording device (12); Among them, the pressing member (16) is connected to the telescopic end of the cylinder (15) through a first connection assembly; Among them, the positioning member (17) is connected to the inner bottom surface of the water tank (13) through a second connection assembly; Among them, a driving unit is arranged inside the water tank (13), the driving unit is used to drive the positioning member (17) to rotate, and the driving unit is located below the partition (131), and the driving unit includes a driving assembly and a transmission assembly; Among them, a water blocking assembly is arranged above the water tank (13) to prevent water from splashing.

2. The airtightness detection device for the turbocharger housing according to claim 1, characterized in that, The first connection assembly includes a connecting plate (21) and a vertical rod (22). Two holes are formed in the connecting plate (21). The telescopic end of the cylinder (15) extends into one of the holes and is fixed in the hole. The vertical rod (22) is rotatably installed in the other hole. The inside of the vertical rod (22) is hollow, and the vertical rod (22) is communicated with the pressing member (16). A rotary joint (23) is installed at the top end of the vertical rod (22).

3. The airtightness detection device for the turbocharger housing according to claim 2, characterized in that, The second connection assembly includes an outer cylinder (31) and a sliding rod (32). The outer cylinder (31) is rotatably installed on the inner bottom surface of the water tank (13). The outer cylinder (31) passes through the partition (131) and is rotatably connected to the partition (131). The sliding rod (32) is slidably arranged in the outer cylinder (31). The top end of the sliding rod (32) extends to the outside of the outer cylinder (31) and is fixedly connected to the positioning member (17). The outer cylinder (31) and the sliding rod (32) are connected by a first spring (33). The inner circle of the cross section of the outer cylinder (31) and the cross section of the sliding rod (32) are both rectangular structures.

4. The airtightness detection device for a turbocharger housing according to claim 3, characterized in that, The outer cylinder (31), the inner rod, the positioning member (17), the pressing member (16) and the vertical rod (22) are coaxially arranged.

5. The airtightness detection device for the turbocharger housing according to claim 1, characterized in that, The driving assembly includes an electric push cylinder (41), a horizontal plate (42), a threaded rod (43), a moving seat (44) and a rack (45). The electric push cylinder (41) is installed inside the water tank (13). The horizontal plate (42) is fixed to the telescopic end of the electric push cylinder (41). The threaded rod (43) is installed on the side of the horizontal plate (42) through two bearing seats. The moving seat (44) is threadedly sleeved on the threaded rod (43). The rack (45) is fixed to the side of the moving seat (44). A fixed rod (46) is fixed at the end of the threaded rod (43). One end of the fixed rod (46) away from the threaded rod (43) passes through the sliding opening (132) and extends to the outside of the water tank (13).

6. The airtightness detection device for the turbocharger housing according to claim 5, wherein The transmission assembly includes a first gear (47), a rotating shaft (48), a second gear (49), a third gear (410) and a fourth gear (411). Both the first gear (47) and the fourth gear (411) are fixedly sleeved on the outer cylinder (31). The rotating shaft (48) is rotatably installed on the inner bottom surface of the water tank (13). Both the second gear (49) and the third gear (410) are fixedly sleeved on the rotating shaft (48). The third gear (410) meshes with the fourth gear (411).

7. The airtightness detection device for the turbocharger housing according to claim 1, characterized in that, The water blocking assembly includes a water blocking cylinder (51), a rotating door (52) and a mounting plate (53). One end of the mounting plate (53) is fixedly connected to the machine body (11), and the other end is fixedly connected to the water blocking cylinder (51). The water blocking cylinder (51) is located directly above the water tank (13). The rotating door (52) is rotatably installed on the water blocking cylinder (51), and the rotating door (52) and the water blocking cylinder (51) together form a cylindrical structure.

8. The airtightness detection device for the turbocharger housing according to claim 7, characterized in that, A number of air injection pipes (61) are fixed inside the water blocking cylinder (51). A number of air injection holes (62) are formed in each air injection pipe (61). Adjacent two air injection pipes (61) are connected through a connecting pipe (63). An air supply assembly is arranged inside the water tank (13), and the air supply assembly is located below the partition plate (131).

9. The airtightness detection device for a turbocharger housing according to claim 8, characterized in that, The air supply assembly includes a sealing cylinder (64), a sliding plug (65), a connecting rod (66) and an air supply pipe (68). The sealing cylinder (64) is fixed inside the water tank (13). The sliding plug (65) is hermetically slidably connected inside the sealing cylinder (64). One end of the connecting rod (66) is connected to the sliding plug (65), and the other end extends to the outside of the sealing cylinder (64). The sliding plug (65) is connected to the sealing cylinder (64) through a second spring (67). One end of the air supply pipe (68) is connected to the sealing cylinder (64), and the other end is connected to one of the air injection pipes (61).

10. The airtightness detection device for the turbocharger housing according to claim 8, characterized in that, A slidable wiper ring (71) is arranged inside the water baffle cylinder (51), and the outer edge of the wiper ring (71) is in fit with the inner surface of the water baffle cylinder (51). A plurality of avoidance grooves are formed in the wiper ring (71), and a plurality of the air injection pipes (61) respectively pass through the plurality of avoidance grooves. A push rod (72) is fixed on the wiper ring (71), the push rod (72) passes through the fixing frame (14) and is slidably connected with the fixing frame (14). A sleeve plate (73) is fixed at one end of the push rod (72) above the fixing frame (14), and the sleeve plate (73) is connected with the fixing frame (14) through a third spring (74).

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