Automobile pipeline air tightness detection device

Abstract

This application relates to the field of airtightness testing, and in particular to an airtightness testing device for automotive pipelines. The device includes a base, a mounting base, a sliding base, and a measuring device. The mounting base and the sliding base are spaced apart and connected to the surface of the base. The measuring device includes an inlet seat, an outlet seat, and a measuring assembly. The inlet seat is connected to the surface of the sliding base, and the outlet seat is connected to the surface of the mounting base. The measuring assembly includes a controller, at least two flow meters, at least two inlet connectors, and at least two outlet connectors. One inlet connector is connected to the surface of the inlet seat, and the other inlet connector is connected to the surface of the outlet seat. The controller is electrically connected to the two flow meters. The configuration of the controller, flow meters, inlet connectors, and outlet connectors in this application eliminates the need for personnel to immerse the pipeline in water to observe the number of bubbles, thereby improving the accuracy of pipeline airtightness testing.

Description

Technical Field

[0001] This application relates to the field of airtightness testing, and in particular to an airtightness testing device for automotive pipelines. Background Technology

[0002] Automotive piping is a tubular assembly of parts that connect various functional components of a car and transport media such as oil, electricity, and gas. After the rubber hoses of automotive parts are vulcanized and shaped, they need to undergo an airtightness test. The traditional airtightness test involves introducing compressed air at a certain pressure into the inner cavity of the pipe to be tested, and then immersing the pipe in water to observe whether there are any air bubbles or leaks on the surface of the pipe.

[0003] However, during the airtightness testing of pipelines, when there is a minor leak, the resulting bubbles may be very small and few in number, making it difficult for staff to accurately observe and count them with the naked eye, thus reducing the accuracy of the pipeline airtightness test. Summary of the Invention

[0004] To improve the accuracy of pipeline airtightness testing, this application provides an automotive pipeline airtightness testing device.

[0005] This application provides an automotive pipeline airtightness testing device, which adopts the following technical solution: A device for testing the air tightness of automotive pipelines includes a base, a mounting base, a sliding base, and a measuring device. The mounting base and the sliding base are spaced apart and connected to the surface of the base. The measuring device includes an air inlet seat, an air outlet seat, and a measuring assembly. The air inlet seat is connected to the surface of the sliding base, and the air outlet seat is connected to the surface of the mounting base. The measuring assembly includes a controller, at least two flow meters, at least two air inlet connectors, and at least two air outlet connectors. One of the air inlet connectors is connected to the surface of the air inlet seat, and the other air inlet connector is connected to the surface of the air outlet seat. The air inlet connector on the air inlet seat is connected to the air outlet end of an air pump, and the air outlet seat... An air inlet connector is provided for pipe fitting. One of the air outlet connectors is connected to the surface of the air inlet seat, and the other air outlet connector is connected to the surface of the air outlet seat. The air outlet connector on the air inlet seat is provided for pipe fitting. Both the air outlet seat and the air inlet seat are provided with a connecting flow channel, which connects the inner cavity of the air inlet connector and the inner cavity of the air outlet connector. The flow meter corresponds to the air inlet connector and is connected to the inner wall of the air inlet connector. The controller is electrically connected to the two flow meters. The flow meters send the flow value of the air inlet connector to the controller. The controller compares the difference between the flow values ​​of the two flow meters with a preset value to determine the airtightness of the pipe.

[0006] By adopting the above technical solution, during pipeline airtightness testing, one end of the pipeline is coaxially fitted onto the outer circumferential surface of the outlet joint of the inlet seat, and the other end of the pipeline is coaxially fitted onto the outer circumferential surface of the inlet joint of the outlet seat. The outer circumferential surface of the outlet joint abuts against the inner circumferential surface of the pipeline to form a seal, and the outer circumferential surface of the inlet joint abuts against the inner circumferential surface of the pipeline to form a seal, thus achieving a sealed connection between both ends of the pipeline in the axial direction and the inlet and outlet joints; simultaneously, the air pump drives the gas to sequentially pass through the inner cavity of the inlet joint of the inlet seat, the connecting channel of the inlet seat, the inner cavity of the outlet joint of the inlet seat, and the inner cavity of the pipeline. The air outlet has an inlet connector cavity and a connecting flow channel, and the air is discharged from the outlet connector. The flow meter measures the flow rate of the gas in the inlet connector cavity in real time and sends it to the controller. The controller compares the difference between the flow rates of the two flow meters with a preset value. When the difference is within the preset value range, the pipe is airtight. When the difference is not within the preset value range, the pipe is airtight. This achieves automatic detection of pipe airtightness without the need for personnel to immerse the pipe in water to observe the number of bubbles, thereby improving the detection accuracy of pipe airtightness.

[0007] Optionally, the sliding seat includes a sliding part and a rotating shaft. The sliding part is slidably connected to the surface of the seat body, and the rotating shaft is rotatably connected to the surface of the sliding part. The rotation axis of the rotating shaft and the sliding direction of the sliding part are perpendicular to each other, and the air intake seat is connected to the surface of the rotating shaft.

[0008] By adopting the above technical solution, when the pipe length changes, the sliding part is driven to slide on the surface of the seat, so that the distance between the sliding part and the mounting seat is adapted to the pipe length. Then, the rotating shaft is driven to rotate on the surface of the sliding part, and the direction of the air outlet on the air inlet seat is adapted to the direction of the pipe opening, so that the outer circumferential surface of the air outlet can stably press against the inner circumferential surface of the pipe to form a seal. This allows the detection device to be adapted to pipes with different structures, thereby improving the versatility of the detection device.

[0009] Optionally, the mounting base is rotatably connected to the surface of the base body, and the rotation axis of the mounting base and the rotation axis of the rotating shaft are parallel to each other.

[0010] By adopting the above technical solution, the mounting base is driven to rotate on the surface of the base body, so that the orientation of the air inlet connector on the air outlet is adapted to the orientation of the pipe opening, ensuring that the outer circumferential surface of the air inlet connector can press against the inner circumferential surface of the pipe to form a seal, thereby improving the detection accuracy of the pipe's airtightness.

[0011] Optionally, the outer peripheral surface of the air outlet connector on the air inlet seat is provided with a guide surface. The guide surface is constricted in the direction close to the axis of the air outlet connector. The guide surface abuts against the inner wall of the pipe and guides the pipe to be coaxially sleeved on the outer peripheral surface of the air outlet connector.

[0012] By adopting the above technical solution, the guide surface is constricted in the direction close to the axis of the air outlet joint. The guide surface can abut against the inner wall of the pipe and guide the pipe to be coaxially sleeved on the outer circumferential surface of the air outlet joint, thereby reducing the wear between the inner wall of the pipe and the outer circumferential surface of the air outlet joint, and thus extending the service life of the detection device.

[0013] Optionally, the air inlet seat is connected to a sealing assembly, the sealing assembly including a sealing ring bladder, and the outer peripheral surface of the air outlet connector is provided with a sealing ring cavity for the sealing ring bladder to be embedded in. The inner wall of the sealing ring bladder abuts against the inner wall of the sealing ring cavity to form a seal, and the outer wall of the sealing ring bladder abuts against the inner wall of the pipe to form a seal.

[0014] By adopting the above technical solution, when the pipe opening is coaxially sleeved on the outer circumferential surface of the gas outlet joint, the outer circumferential surface of the sealing ring bladder abuts against the inner wall of the pipe to form a seal, and the inner circumferential surface of the sealing ring bladder abuts against the inner wall of the sealing ring cavity to form a seal. This makes it difficult for the gas discharged from the gas outlet joint to overflow from the abutment between the pipe and the gas outlet joint, ensuring that the gas stably enters the inner cavity of the pipe from the gas outlet joint, thereby improving the detection accuracy of the gas tightness of the pipe.

[0015] Optionally, the sealing assembly further includes a cylinder, a connecting rod, a connecting ring, and an inflation piston. The surface of the air inlet seat facing the air outlet joint has a sliding cavity for the connecting ring to slide. The sliding direction of the connecting ring is parallel to the axis of the air outlet joint. The end of the inflation piston is connected to the surface of the connecting ring facing the air outlet joint. The inner wall of the sliding cavity has an inflation channel for the inflation piston to slide. The inflation channel penetrates the surface of the air inlet seat in a direction close to the air outlet joint. The inner wall of the sealing ring cavity has a supply channel. The supply channel connects the inner cavity of the sealing ring bladder and the inflation channel. The cylinder is connected to the surface of the air inlet seat. The axis of the cylinder piston rod is parallel to the sliding direction of the connecting ring. One end of the connecting rod is connected to the surface of the connecting ring, and the other end of the connecting rod is connected to the cylinder piston rod. The cylinder is located on the side of the connecting ring away from the inflation piston.

[0016] By adopting the above technical solution, when the pipe is coaxially sleeved on the outer circumferential surface of the air outlet joint, the cylinder piston rod extends, the connecting rod receives the power of the cylinder and pushes the connecting ring to slide along the inner wall of the sliding cavity towards the air outlet joint, pushing the inflation piston to slide along the inner wall of the inflation channel towards the air supply channel, causing the air in the inflation channel to enter the inner cavity of the sealing ring bladder through the air supply channel. The outer circumferential surface of the sealing ring bladder is pressurized and expanded and presses against the inner wall of the pipe to form a seal, improving the pressing force between the outer circumferential surface of the sealing ring bladder and the inner wall of the pipe, thereby improving the sealing stability between the inner wall of the pipe and the outer circumferential surface of the air outlet joint.

[0017] Optionally, the sealing assembly further includes a retaining ring, which is coaxially connected to the surface of the connecting ring facing the outlet connector, and the inner wall of the retaining ring can press against the outer circumferential surface of the pipe to form a seal.

[0018] By adopting the above technical solution, the inner wall of the pipe is pressed against the outer circumference of the air outlet joint to form a seal, and the outer wall of the pipe is pressed against the inner wall of the sealing ring to form a seal, so that the air discharged from the air outlet joint is not easy to escape from the joint between the pipe and the air outlet joint, thereby improving the detection accuracy of the pipe's airtightness.

[0019] Optionally, the sealing assembly further includes a guide ring, the outer ring wall of which is coaxially connected to the inner ring wall of the abutment ring. The end face of the guide ring facing the air outlet connector has an abutment surface, which is flared in the direction close to the axis of the abutment ring. The abutment surface can abut against the outer circumferential surface of the pipe and guide the outer circumferential surface of the pipe to deform in the direction close to the axis of the pipe. The inner ring wall of the pipe abuts against the outer circumferential surface of the air outlet connector to form a seal.

[0020] By adopting the above technical solution, when the cylinder piston rod extends, the pressing surface abuts against the outer circumference of the pipe and guides the outer circumference of the pipe to deform in a direction close to the pipe axis. The inner ring wall of the pipe abuts against the outer circumference of the air outlet joint to form a seal, further improving the pressing force between the inner ring wall of the pipe and the outer circumference of the air outlet joint.

[0021] Optionally, the sealing ring bladder is located on the side of the guide ring away from the connecting ring.

[0022] By adopting the above technical solution, the sealing ring bladder is located on the side of the guide ring away from the connecting ring. The sealing surface guides the outer circumference of the pipe to deform in a direction closer to the pipe axis. At the same time, the outer ring wall of the sealing ring bladder presses against the inner wall of the pipe and guides the inner wall of the pipe to deform in a direction away from the pipe axis, thereby achieving multi-point compression deformation of the inner wall of the pipe and further improving the clamping force between the inner wall of the pipe and the outer circumference of the air outlet joint.

[0023] Optionally, the surface of the seat is connected to a slide rail, and the surface of the sliding part is provided with a slide track for the slide rail to slide.

[0024] By adopting the above technical solution, when the sliding part slides on the surface of the seat, the slide rail slides on the inner wall of the slide, making it less likely for the sliding part to deviate when sliding on the surface of the seat, thereby improving the stability of the sliding part sliding on the surface of the seat.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The setup of controllers, flow meters, inlet connectors, and outlet connectors enables automatic detection of pipeline air tightness, eliminating the need for personnel to immerse the pipeline in water to observe the number of bubbles, thereby improving the accuracy of pipeline air tightness detection. The sliding part and rotating shaft are designed to ensure that the outer circumferential surface of the air outlet joint can stably press against the inner circumferential surface of the pipe to form a seal, so that the detection device can be adapted to pipes with different structures, thereby improving the versatility of the detection device. The guide surface design reduces wear between the inner wall of the pipe and the outer circumference of the air outlet connector, thereby extending the service life of the detection device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a cross-sectional view of the air intake seat in an embodiment of this application, mainly showing the connecting flow channel.

[0028] Figure 3 This is a schematic diagram of the overall structure of the sealing assembly in the embodiments of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Base; 2. Mounting base; 3. Sliding base; 31. Sliding part; 311. Slide rail; 32. Rotating shaft; 4. Measuring device; 41. Inlet seat; 411. Connecting flow channel; 412. Sliding cavity; 413. Inflation flow channel; 42. Outlet seat; 43. Measuring component; 431. Flow meter; 432. Inlet connector; 433. Outlet connector; 4331. Guide surface; 4332. Sealing ring cavity; 4333. Supply flow channel; 5. Pipe; 6. Slide rail; 7. Sealing component; 71. Sealing ring bladder; 72. Cylinder; 73. Connecting rod; 74. Connecting ring; 75. Inflation piston; 76. Clamping ring; 77. Guide ring; 771. Clamping surface. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a device for testing the airtightness of automotive pipelines. (Refer to...) Figure 1 The automotive pipeline air tightness testing device includes a base 1, a mounting base 2, a sliding base 3, and a measuring device 4. The bottom of the base 1 abuts against the ground to form a support. The sliding base 3 and the mounting base 2 are spaced apart on the surface of the base 1. The number of measuring devices 4 can be one, two, or more. In this embodiment, there are multiple measuring devices 4, which are spaced apart between the mounting base 2 and the sliding base 3. The arrangement direction of the measuring devices 4 is parallel to the length direction of the base 1. The measuring devices 4 can limit the two ends of the pipeline 5 to the mounting base 2 and the sliding base 3 one by one and automatically detect the air tightness. There is no need for the staff to immerse the pipeline 5 in water to observe the number of bubbles, thereby improving the detection accuracy of the air tightness of the pipeline 5.

[0032] Reference Figure 1The mounting base 2 is rotatably connected to the surface of the base 1. The rotation axis of the mounting base 2 is parallel to the length direction of the base 1. The sliding base 3 includes a sliding part 31 and a rotating shaft 32. The sliding part 31 is slidably connected to the surface of the base 1. The sliding direction of the sliding part 31 is parallel to the height direction of the base 1. The surface of the base 1 is fixed with a slide rail 6 by bolts. The number of slide rails 6 can be one, two or more. In this embodiment, there are two slide rails 6. The two slide rails 6 are located on both sides of the length direction of the base 1. The surface of the sliding part 31 is provided with multiple slide tracks 311 for the slide rails 6 to slide. The sliding part 31 slides along the axis of the slide rails 6 on the surface of the base 1, so that the sliding part 31 is not easy to deviate during the sliding process on the surface of the base 1, thereby improving the stability of the sliding part 31 on the surface of the base 1.

[0033] Reference Figure 1 The rotating shaft 32 is rotatably connected to the surface of the sliding part 31. The rotation axis of the rotating shaft 32 is parallel to the length direction of the base 1. The mounting base 2 is rotatably connected to the surface of the base 1. The rotation axis of the mounting base 2 is parallel to the rotation axis of the rotating shaft 32.

[0034] Reference Figure 1 and Figure 2 The measuring device 4 includes an air inlet seat 41, an air outlet seat 42, and a measuring component 43. The air inlet seat 41 is fixed to the outer circumference of the rotating shaft 32 by bolts, and the air outlet seat 42 is fixed to the surface of the mounting base 2 by bolts. The measuring component 43 is connected between the air inlet seat 41 and the air outlet seat 42. The measuring component 43 can clamp both ends of the pipe 5 and detect the air tightness of the pipe 5. The measuring component 43 includes a controller, two flow meters 431, two air inlet connectors 432, and two air outlet connectors 433. One air inlet connector 432 and one air outlet connector 433 are welded and fixed to the surface of the air inlet seat 41 at intervals, and the other air inlet connector 432 and the other air outlet connector 433 are welded and fixed to the surface of the air outlet seat 42 at intervals. The axis of the air inlet connector 432 is perpendicular to the axis of the rotating shaft 32, and the axis of the air inlet connector 432 is perpendicular to the axis of the air outlet connector 433.

[0035] Reference Figure 1 and Figure 2 Both the air inlet seat 41 and the air outlet seat 42 are provided with a connecting flow channel 411. The connecting flow channel 411 connects the inner cavity of the air inlet connector 432 and the inner cavity of the air outlet connector 433. The air inlet connector 432 on the air inlet seat 41 is connected to the air outlet end of the air pump through an air pipe. The air outlet connector 433 on the air inlet seat 41 is fitted with the pipe opening of the pipe 5. The outer peripheral surface of the air outlet connector 433 on the air inlet seat 41 is provided with a guide surface 4331. The guide surface 4331 is constricted in the direction close to the axis of the air outlet connector 433. The guide surface 4331 can abut against the inner wall of the pipe 5 and guide the pipe opening of the pipe 5 to be coaxially fitted on the outer peripheral surface of the air outlet connector 433. The air inlet connector 432 on the air outlet seat 42 is fitted with the pipe opening of the pipe 5.

[0036] Reference Figure 1 and Figure 2 The flow meter 431 corresponds one-to-one with the air inlet connector 432 and is fixed to the inner wall of the air inlet connector 432 with bolts. The flow meter 431 can measure the flow rate of the gas in the air inlet connector 432 in real time. The controller is electrically connected to the two flow meters 431. The flow meter 431 sends the flow value of the air inlet connector 432 to the controller. The controller compares the two flow values ​​with a preset value. When the difference between the two flow values ​​is within the preset value range, the air tightness test of the pipeline 5 is qualified. When the difference between the two flow values ​​is not within the preset value range, the air tightness test of the pipeline 5 is unqualified. This realizes the automatic detection of the air tightness of the pipeline 5, eliminating the need for personnel to immerse the pipeline 5 in water to observe the number of bubbles, thereby improving the detection accuracy of the air tightness of the pipeline 5.

[0037] Reference Figure 2 and Figure 3 Both the air inlet seat 41 and the air outlet seat 42 are equipped with sealing components 7, which can improve the sealing stability of the pipe 5 opening. The sealing component 7 includes a sealing ring bladder 71, a cylinder 72, a connecting rod 73, a connecting ring 74, an inflation piston 75, a clamping ring 76, and a guide ring 77. The sealing ring bladder 71 and the inflation piston 75 can be made of rubber or silicone. In this embodiment, the sealing ring bladder 71 and the inflation piston 75 are both made of rubber, which has a certain deformation capacity. The outer circumferential surface of the head 433 is coaxially provided with a sealing ring cavity 4332 for the sealing ring 71 to be embedded. The inner wall of the sealing ring 71 abuts against the inner wall of the sealing ring cavity 4332 to form a seal. The outer wall of the sealing ring 71 can abut against the inner wall of the pipe 5 to form a seal. The surface of the air inlet seat 41 facing the air outlet connector 433 is provided with a sliding cavity 412 for the connecting ring 74 to slide. The axis of the connecting ring 74 coincides with the axis of the air outlet connector 433, and the sliding direction of the connecting ring 74 is parallel to the axis of the air outlet connector 433.

[0038] Reference Figure 2 and Figure 3 The number of inflation pistons 75 can be one, two or more. In this embodiment, the number of inflation pistons 75 is more than one. The ends of the multiple inflation pistons 75 are evenly fixed around the axis of the connecting ring 74 on the surface of the connecting ring 74 facing the air outlet 433. The inner wall of the sliding cavity 412 near the air outlet 433 is provided with multiple inflation channels 413 for the ends of the inflation pistons 75 to slide. The inflation channels 413 penetrate the surface of the air outlet seat 42 in the direction near the air outlet 433. The inner wall of the sealing ring cavity 4332 is provided with multiple air supply channels 4333 at intervals. The air supply channels 4333 correspond to the inflation channels 413 one by one, and the air supply channels 4333 connect the inner cavity of the sealing ring bladder 71 and the inflation channels 413.

[0039] Reference Figure 2 and Figure 3 The cylinder 72 is fixed to the surface of the intake seat 41 by bolts. The piston rod axis of the cylinder 72 and the axis of the connecting ring 74 are parallel to each other. The sliding cavity 412 penetrates the surface of the intake seat 41 in the direction close to the piston rod of the cylinder 72. One end of the connecting rod 73 is welded and fixed to the surface of the connecting ring 74, and the other end of the connecting rod 73 is welded and fixed to the piston rod of the cylinder 72. The cylinder 72 is located on the side of the connecting ring 74 away from the charging piston 75.

[0040] Reference Figure 2 and Figure 3 The clamping ring 76 is coaxially welded and fixed to the surface of the connecting ring 74 facing the air outlet connector 433. The outer diameter of the clamping ring 76 is equal to the outer diameter of the connecting ring 74, and the inner diameter of the clamping ring 76 is equal to the outer diameter of the pipe 5. The inner wall of the clamping ring 76 can press against the outer circumference of the pipe 5 to form a seal.

[0041] Reference Figure 2 and Figure 3 The outer ring wall of the guide ring 77 is coaxially fixed to the inner ring wall of the clamping ring 76. One end of the guide ring 77 in the axial direction is welded and fixed to the end face of the connecting ring 74. The end face of the guide ring 77 facing the air outlet connector 433 is provided with a clamping surface 771. The clamping surface 771 is flared in the direction close to the axial direction of the clamping ring 76. The guide ring 77 is located on the side of the sealing ring 71 close to the connecting ring 74. The clamping surface 771 can clamp against the outer circumferential surface of the pipe 5 and guide the outer circumferential surface of the pipe 5 to deform in the direction close to the axial direction of the pipe 5. The inner ring wall of the pipe 5 clamps against the outer circumferential surface of the air outlet connector 433 to form a seal.

[0042] Reference Figure 2 and Figure 3 When the pipe 5 is coaxially fitted onto the outer circumferential surface of the air outlet connector 433, the inner wall of the sealing ring bladder 71 abuts against the inner wall of the sealing ring cavity 4332 to form a seal, and the outer wall of the sealing ring bladder 71 abuts against the inner wall of the pipe 5 to form a seal. At the same time, the piston rod of the cylinder 72 extends, and the connecting rod 73 receives the power of the cylinder 72 and drives the connecting ring 74 to slide towards the air outlet connector 433, pushing the inflation piston 75 to slide along the inner wall of the inflation channel 413 towards the air supply channel 4333, causing the air in the inflation channel 413 to enter the inner cavity of the sealing ring bladder 71 through the air supply channel 4333. The outer circumferential surface of the sealing ring bladder 71 is pressurized and expands and abuts against the outer circumferential surface of the pipe 5 to form a seal, further improving the abutting force between the inner wall of the pipe 5 and the outer circumferential surface of the sealing ring bladder 71.

[0043] Reference Figure 2 and Figure 3Simultaneously, the contact surface 771 abuts against the outer circumference of the pipe 5 and guides the outer circumference of the pipe 5 to deform in a direction closer to the axis of the pipe 5, and the inner wall of the pipe 5 abuts against the outer circumference of the air outlet joint 433 to form a seal, further improving the abutment force between the inner wall of the pipe 5 and the outer circumference of the air outlet joint 433; when the air tightness test of the pipe 5 is completed, the piston rod of the cylinder 72 retracts, the connecting rod 73 receives the power of the cylinder 72 and pushes the connecting ring 74 to slide along the inner wall of the sliding cavity 412 in a direction away from the air outlet joint 433, driving the inflation piston 75 to slide along the inner wall of the inflation channel 413 in a direction away from the supply channel 4333. The air inside the sealing ring bladder 71 slides in the direction of the air supply channel 4333 and enters the charging channel 413 through the air supply channel 4333. The outer circumference of the sealing ring bladder 71 is depressurized and contracts, reducing the clamping force between the outer wall of the sealing ring bladder 71 and the inner wall of the pipe 5. At the same time, it drives the clamping ring 76 to slide away from the pipe 5 along the inner wall of the sliding cavity 412. The clamping surface 771 is flush with the surface of the air outlet seat 42, so that the clamping effect of the clamping surface 771 on the outer circumference of the pipe 5 disappears. This makes it easier to remove the pipe 5 outlet from the air outlet connector 433, reducing wear on the inner wall of the pipe 5 and ensuring the quality of the pipe 5.

[0044] The implementation principle of the automotive pipeline air tightness testing device according to this application embodiment is as follows: When the pipeline 5 is tested for air tightness, the sliding part 31 slides along the axis of the slide rail 6 on the surface of the seat 1, so that the distance between the air outlet seat 42 and the air inlet seat 41 is adapted to the length of the pipeline 5. The rotating shaft 32 is driven to rotate on the sliding part 31, so that the axis of the air outlet connector 433 on the air inlet seat 41 is adapted to the orientation of one of the pipe openings of the pipeline 5. Then, the mounting base 2 is driven to rotate on the surface of the seat 1, so that the axis of the air inlet connector 432 on the air outlet seat 42 is adapted to the orientation of the other pipe opening of the pipeline 5. The two ends of the pipeline 5 in the axial direction are coaxially sleeved on the air outlet connector 433 on the air inlet seat 41 and the air inlet connector 432 on the air outlet seat 42, so as to achieve sealing and fixing of the two ends of the pipeline 5. The air pump drives the gas through the air inlet seat 42 in sequence. The air inlet connector 432 of the air seat 41, the connecting flow channel 411 of the air inlet seat 41, the air outlet connector 433 of the air inlet seat 41, the inner cavity of the pipe 5, the air inlet connector 432 of the air outlet seat 42, the connecting flow channel 411 of the air outlet seat 42, and the air is discharged from the air outlet connector 433 of the air outlet seat 42. The flow meter 431 measures the flow rate of the gas in the inner cavity of the air inlet connector 432 in real time and sends it to the controller. The controller compares the difference between the flow values ​​of the two flow meters 431 with the preset value. When the difference is within the preset value range, the air tightness of the pipe 5 is qualified. When the difference is not within the preset value range, the air tightness of the pipe 5 is unqualified. This realizes the automatic detection of the air tightness of the pipe 5, eliminating the need for personnel to immerse the pipe 5 in water to observe the number of bubbles, thereby improving the detection accuracy of the air tightness of the pipe 5.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting the air tightness of a pipe of a vehicle, characterized in that: The device includes a base (1), a mounting base (2), a sliding base (3), and a measuring device (4). The mounting base (2) and the sliding base (3) are spaced apart and connected to the surface of the base (1). The measuring device (4) includes an air inlet seat (41), an air outlet seat (42), and a measuring component (43). The air inlet seat (41) is connected to the surface of the sliding base (3), and the air outlet seat (42) is connected to the surface of the mounting base (2). The measuring component (43) includes a controller, at least two flow meters (431), at least two air inlet connectors (432), and at least two air outlet connectors (433). One of the air inlet connectors (432) is connected to the surface of the air inlet seat (41), and the other air inlet connector (432) is connected to the surface of the air outlet seat (42). The air inlet connector (432) on the air inlet seat (41) is connected to the air outlet end of the air pump, and the air inlet connector (432) on the air outlet seat (42) is connected to the air outlet end of the air pump. The pipe (5) is fitted with an air outlet connector (433), one of which is connected to the surface of the air inlet seat (41), and the other is connected to the surface of the air outlet seat (42). The air outlet connector (433) on the air inlet seat (41) is fitted with the pipe (5). Both the air outlet seat (42) and the air inlet seat (41) are provided with a connecting flow channel (411). The connecting flow channel (411) connects the inner cavity of the air inlet connector (432) and the inner cavity of the air outlet connector (433). The flow meter (431) corresponds to the air inlet connector (432) and is connected to the inner wall of the air inlet connector (432). The controller is electrically connected to the two flow meters (431). The flow meter (431) sends the flow value of the air inlet connector (432) to the controller. The controller compares the difference between the flow values ​​of the two flow meters (431) with a preset value to determine the air tightness of the pipe (5).

2. The automobile pipeline air tightness detection device according to claim 1, characterized in that: The sliding seat (3) includes a sliding part (31) and a rotating shaft (32). The sliding part (31) is slidably connected to the surface of the seat body (1). The rotating shaft (32) is rotatably connected to the surface of the sliding part (31). The rotation axis of the rotating shaft (32) and the sliding direction of the sliding part (31) are perpendicular to each other. The air intake seat (41) is connected to the surface of the rotating shaft (32).

3. The automobile pipeline air tightness detection device according to claim 2, characterized in that: The mounting base (2) is rotatably connected to the surface of the base body (1), and the rotation axis of the mounting base (2) and the rotation axis of the rotating shaft (32) are parallel to each other.

4. The automobile pipeline air tightness detection device according to claim 1, characterized in that: The outer circumferential surface of the air outlet connector (433) on the air inlet seat (41) is provided with a guide surface (4331). The guide surface (4331) is constricted in the direction close to the axis of the air outlet connector (433). The guide surface (4331) abuts against the inner wall of the pipe (5) and guides the pipe (5) to be coaxially sleeved on the outer circumferential surface of the air outlet connector (433).

5. The automobile pipeline air tightness detection device according to claim 1, characterized in that: The air inlet seat (41) is connected to a sealing assembly (7), which includes a sealing ring bladder (71). The outer circumferential surface of the air outlet connector (433) is provided with a sealing ring cavity (4332) for the sealing ring bladder (71) to be embedded. The inner wall of the sealing ring bladder (71) abuts against the inner wall of the sealing ring cavity (4332) to form a seal, and the outer wall of the sealing ring bladder (71) abuts against the inner wall of the pipe (5) to form a seal.

6. The automobile pipeline air tightness detection device according to claim 5, characterized in that: The sealing assembly (7) further includes a cylinder (72), a connecting rod (73), a connecting ring (74), and an inflation piston (75). The surface of the air inlet seat (41) facing the air outlet connector (433) has a sliding cavity (412) for the connecting ring (74) to slide. The sliding direction of the connecting ring (74) is parallel to the axis of the air outlet connector (433). The end of the inflation piston (75) is connected to the surface of the connecting ring (74) facing the air outlet connector (433). The inner wall of the sliding cavity (412) has an inflation passage (413) for the inflation piston (75) to slide. The inflation passage (413) faces the air outlet connector (433). The direction of 33) penetrates the surface of the air intake seat (41). The inner wall of the sealing ring cavity (4332) is provided with an air supply channel (4333). The air supply channel (4333) connects the inner cavity of the sealing ring bladder (71) and the charging channel (413). The cylinder (72) is connected to the surface of the air intake seat (41). The piston rod axis of the cylinder (72) and the sliding direction of the connecting ring (74) are parallel to each other. One end of the connecting rod (73) is connected to the surface of the connecting ring (74), and the other end of the connecting rod (73) is connected to the piston rod of the cylinder (72). The cylinder (72) is located on the side of the connecting ring (74) away from the charging piston (75).

7. The automobile pipeline air tightness detection device according to claim 6, characterized in that: The sealing assembly (7) also includes a retaining ring (76), which is coaxially connected to the surface of the connecting ring (74) facing the air outlet (433). The inner wall of the retaining ring (76) can press against the outer circumferential surface of the pipe (5) to form a seal.

8. The automobile pipeline air tightness detection device according to claim 7, characterized in that: The sealing assembly (7) further includes a guide ring (77), the outer ring wall of which is coaxially connected to the inner ring wall of the clamping ring (76). The end face of the guide ring (77) facing the air outlet connector (433) is provided with a clamping surface (771). The clamping surface (771) is flared in the direction close to the axis of the clamping ring (76). The clamping surface (771) can abut against the outer circumferential surface of the pipe (5) and guide the outer circumferential surface of the pipe (5) to deform in the direction close to the axis of the pipe (5). The inner ring wall of the pipe (5) abuts against the outer circumferential surface of the air outlet connector (433) to form a seal.

9. The automobile pipeline air tightness detection device according to claim 8, characterized in that: The sealing ring bladder (71) is located on the side of the guide ring (77) away from the connecting ring (74).

10. The automobile pipeline air tightness detection device according to claim 2, characterized in that: The surface of the seat (1) is connected to a slide rail (6), and the surface of the sliding part (31) is provided with a slide track (311) for the slide rail (6) to slide.

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