Automobile pipeline air tightness inspection equipment

Abstract

The invention relates to the technical field of automobile pipeline detection, and discloses automobile pipeline airtightness detection equipment which comprises a frame. A table; a pipe fitting body; the positioning assembly is used for detecting and positioning the pipeline fitting body; the detection assembly is used for carrying out pressurization type movable air tightness detection on the pipeline fitting body. According to the automobile pipeline air tightness detection equipment, the workbench is arranged to be of a turnover structure similar to two symmetrical stations, after the workbench is turned over, a pipeline fitting fixedly installed at the initial upper portion can go deep into a water tank, air tightness detection is achieved, the upper portion is in a neutral position, and the work efficiency is greatly improved. An operator can observe the air tightness detection process of the detection assembly on the lower pipeline fitting while installing another pipeline fitting, so that batch detection of the automobile pipeline fittings is carried out, the detection efficiency is improved, the neutral time of the operator is reduced, and the detection efficiency is improved. And a certain degree of high efficiency and convenience are provided for air tightness detection.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile pipeline detection, and specifically relates to an airtightness inspection device for automobile pipelines. Background Art

[0002] Automobiles are the most important means of transportation nowadays. There are pipelines inside, and the main function of the internal pipelines is to provide a passage for the fluids in the automobile. Therefore, their airtightness needs to be detected. Traditional pipeline airtightness detection devices generally use a combination of water and gas for detection, and the pipeline surface should also be dried after that.

[0003] However, there are certain limitations in the current detection of automobile pipeline fittings. Many existing technologies use the combination of air pressure and water for airtightness detection. First, in the traditional detection method, a certain amount of gas or liquid needs to be injected into the pipeline fittings, and then the other end outlet of the pipeline is sealed. After that, pressure is applied. When air pressure is injected into the pipeline fittings, if there is pressure relief, it means that the pipeline fittings have air leakage and the fittings are defective. However, this detection method has low detection efficiency. The operator needs to position the pipeline fittings first and then perform the detection, and then wait for the detection results. This kind of detection efficiency is low. And in the actual detection process, relying only on one-time pressurized gas injection or liquid injection, it is very difficult to achieve airtightness detection under strict simulated working conditions for the pipeline fittings, resulting in certain limitations in the airtightness detection results. Therefore, an airtightness inspection device for automobile pipelines is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an airtightness inspection device for automobile pipelines, which solves the problems of low airtightness detection efficiency and over-limited detection of automobile pipeline fittings in the prior art.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solutions: An airtightness inspection device for automobile pipelines, including a frame; a workbench; a pipeline fitting body; a positioning component for detecting and positioning the pipeline fitting body; a detection component for performing pressurized movable airtightness detection on the pipeline fitting body; a rotary motor is fixedly installed inside the frame, a rotary shaft sleeve is fixedly connected to the output shaft of the rotary motor, the rotary shaft sleeve is connected to the workbench through a connecting member, two groups of positioning components are provided, and the two groups of positioning components are respectively arranged on the upper and lower surfaces of the workbench, and a water tank is arranged inside the frame.

[0008] Preferably, the detection component includes a movable part and a display part. The movable part includes a driving motor, the output end of the driving motor is connected with a reciprocating screw rod, a sliding seat sleeve is slidably connected to the reciprocating screw rod, a sliding frame is slidably connected to the sliding seat sleeve, a sleeve is arranged on the sliding frame, and a push rod is slidably connected inside the sleeve.

[0009] Preferably, two sets of the sleeves and the push rods are provided, and the two sets of sleeves and push rods are symmetrically distributed with the center line of the reciprocating screw rod as the axis of symmetry. One ends of the two sets of sleeves are respectively connected to both ends of the pipeline fitting body through a pipeline device.

[0010] Preferably, a pin rod is fixedly connected inside the sliding seat sleeve, the pin rod slides in the spiral groove on the surface of the reciprocating screw rod, a push piece is fixedly connected to the surface of the sliding seat sleeve, and the push piece slides in a square groove formed in the sliding frame.

[0011] Preferably, a retaining pin is fixedly connected to the push rod, the retaining pin slides in a long groove formed in the sliding frame, one end of the push rod is located inside the sleeve and connected with a return spring, and the left end of the return spring is connected with the inner wall of the sleeve.

[0012] Preferably, a retaining pin is fixedly connected to the push rod, the retaining pin slides in a long groove formed in the sliding frame, one end of the push rod is located inside the sleeve and connected with a return spring, and the left end of the return spring is connected with the inner wall of the sleeve.

[0013] Preferably, the pipeline device includes an air pipe, one end of the air pipe is communicated with the sleeve, the other end of the air pipe is communicated with a connecting sleeve, the connecting sleeve is fixed inside the frame, a partition is arranged inside the rotary shaft sleeve, air venting ports are symmetrically formed on the surface of the rotary shaft sleeve, an air vent is formed in the connecting sleeve, the air vent is communicated with the air venting port below the partition, communicating pipes are symmetrically communicated with the surface of the rotary shaft sleeve, and the two communicating pipes are respectively communicated with both ends of the pipeline fitting body through positioning components.

[0014] Preferably, the positioning component includes a left positioning device and a right positioning device;

[0015] The left positioning device includes a frame one, a cylinder one and a cylinder two are installed on the frame one, the output end of the cylinder one is connected with a top seat one, a clamping seat one is slidably connected to the top seat one through a V-shaped groove, the clamping seat one is used for clamping the left end surface of the pipeline fitting body, the output end of the cylinder two is connected with a pushing seat one, a connector one is installed on the pushing seat one, the connector one abuts against the left end of the pipeline fitting body, and the pushing seat one is communicated with an air inlet pipe through a pipeline.

[0016] Preferably, the right positioning device includes a second frame body. A third cylinder and a fourth cylinder are fixedly installed on the second frame body. The output end of the third cylinder is connected to a pipe connection seat. A second joint is connected to the pipe connection seat. The second joint abuts against the right end of the pipe fitting body. The output end of the fourth cylinder is connected to a second push seat. A second clamping seat is slidably connected to the second push seat. The second clamping seat is used for clamping the right end surface of the pipe fitting body. The pipe connection seat is connected to the pipe device on the right side of the frame through a pipeline.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides an automobile pipeline airtightness inspection device, which has the following beneficial effects:

[0019] 1. This automobile pipeline airtightness inspection device is provided with a flipable structure on the workbench, similar to two symmetrical workstations. When the workbench is flipped, the pipeline fittings initially installed and fixed above will penetrate into the interior of the water tank to achieve airtightness detection, while there will be a vacant space above. The operator can install another pipeline fitting while observing the process of the detection component detecting the airtightness of the pipeline fitting below, so as to detect a batch of automobile pipeline fittings, thereby improving the detection efficiency, reducing the idle time of the operator, and providing a certain degree of high efficiency and convenience for airtightness detection.

[0020] 2. This automobile pipeline airtightness inspection device can achieve slow pressurization detection of automobile pipeline fittings through the set detection component, and the detection process is cyclic, realizing double-head conversion pressurization detection, so as to simulate more accurate working conditions. Because the pipe pressure of automobile pipeline fittings does not increase instantaneously when in use, but increases slowly, the double-head cyclic structure is used to realize cyclic pressurization and pressure relief detection of pipeline fittings, which can improve the accuracy of airtightness detection of pipelines more.

[0021] 3. This automobile pipeline airtightness inspection device can realize the rotary connection of a group of movable parts to two pipeline fittings through the set pipeline device. Only when the pipeline fitting rotates into the interior of the water tank, the air pressure will connect to it, and the pipeline fitting installed above will not be affected. Therefore, the installation and detection of pipeline fittings can be realized simultaneously, and two non-stop operations can be carried out, improving the detection efficiency from the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an automobile pipeline airtightness inspection device proposed by the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the positioning component of an automobile pipeline airtightness inspection device proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the movable parts of an automobile pipeline air tightness testing device proposed by the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of a sliding seat cover of an automobile pipeline air tightness testing device proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the connection structure of a sliding frame and a sleeve of an automobile pipeline air tightness inspection device proposed by the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of a display component of an automobile pipeline air tightness testing device proposed by the present invention;

[0028] Figure 7 This is a structural schematic diagram of a left positioning device of an automobile pipeline air tightness testing device proposed by the present invention;

[0029] Figure 8 This is a schematic structural diagram of a right positioning device of an automobile pipeline air tightness testing device proposed by the present invention;

[0030] Figure 9 It is a schematic diagram of the main structure of the pipeline fitting in the present invention.

[0031] In the figure: 1, frame; 2, workbench; 3, rotating motor; 4, positioning assembly; 41, left positioning device; 42, right positioning device; 411, frame body 1; 412, push seat 1; 413, joint 1; 414, cylinder 1; 415, top seat 1; 416, cylinder 2; 417, clamp seat 1; 421, frame body 2; 422, cylinder 3; 423, cylinder 4; 424, push seat 2; 425, clamp seat 2; 426, joint 2; 427, pipe seat; 5, detection assembly; 501, drive motor; 502, reciprocating screw rod; 503, Sliding seat sleeve; 5031, pin rod; 5032, push piece; 504, sliding frame; 505, push rod; 506, sleeve; 507, return spring; 508, square groove; 509, long groove; 510, bayonet; 511, air pipe; 512, connecting sleeve; 513, vent; 514, air connection port; 515, partition; 516, connecting pipe; 517, air inlet pipe; 518, display tube; 519, piston rod; 520, indicating slide plate; 521, scale line; 522, limit groove; 6, pipeline fitting body; 7, rotating shaft sleeve; 8, water tank. DETAILED DESCRIPTION

[0032] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-9 , an airtightness inspection device for automobile pipelines, including a frame 1; a workbench 2; a pipeline fitting body 6; a positioning component 4 for detecting and positioning the pipeline fitting body 6; a detection component 5 for pressurized movable airtightness detection of the pipeline fitting body 6; a rotary motor 3 is fixedly installed in the frame 1, a rotary shaft sleeve 7 is fixedly connected to the output shaft of the rotary motor 3, the rotary shaft sleeve 7 is connected to the workbench 2 through a connecting member, two groups of positioning components 4 are provided, and the two groups of positioning components 4 are respectively arranged on the upper and lower surfaces of the workbench 2, and a box body 8 is arranged in the frame 1. After the pipeline fitting body 6 is installed and fixed, control the rotary motor 3 to rotate 180 degrees, and rotate the just-installed pipeline fitting body 6 into the interior of the box body 8, and the interior of the box body 8 contains an aqueous solution, so as to perform airtightness detection on the fitting. For the rotated workbench 2, a group of positioning components 4 are also arranged above, so that the operator can reinstall and fix another fitting while detecting the fitting below, realizing synchronous operation of the double workstations, thereby reducing the idle time and improving the detection efficiency.

[0034] In this embodiment, the detection component 5 includes a movable part and a display part. The movable part includes a driving motor 501, the output end of the driving motor 501 is connected to a reciprocating lead screw 502, a sliding seat sleeve 503 is slidably connected to the reciprocating lead screw 502, a sliding frame 504 is slidably connected to the sliding seat sleeve 503, a sleeve 506 is arranged on the sliding frame 504, and a push rod 505 is slidably connected to the interior of the sleeve 506. Control the rotation of the driving motor 501 to drive the rotation of the reciprocating lead screw 502. The reciprocating thread groove on the surface will drive the sliding seat sleeve 503 to slide left and right reciprocally. When sliding to the left, it will abut against the left push rod 505 through the push piece 5032, and then drive the left push rod 505 to perform piston-type sliding in the sleeve 506. At this time, a certain degree of air pressure will be generated inside the sleeve 506 and enter the fitting interior through the pipeline device to achieve pressurized airtightness detection.

[0035] Furthermore, there are two sets of both the sleeve 506 and the push rod 505, and the two sets of the sleeve 506 and the push rod 505 are symmetrically distributed with respect to the center line of the reciprocating lead screw 502. One end of each of the two sets of sleeves 506 is connected to both ends of the pipeline fitting body 6 through a pipeline device. By setting the two sets of left-right symmetric structures, it is possible to perform cyclic complex working condition tests on the fitting, such as pressurizing the left end and the right end. Compared with the traditional airtight test by pressurization, the test result is more accurate. A pin rod 5031 is fixedly connected inside the sliding seat sleeve 503, and the pin rod 5031 slides in the helical groove on the surface of the reciprocating lead screw 502. A push piece 5032 is fixedly connected to the surface of the sliding seat sleeve 503, and the push piece 5032 is slidably connected in a square groove 508 opened in the sliding frame 504. During the test, although the right end of the fitting is connected through a pipeline, the latch 510 provided on the right push rod 505 will be stuck at the position of the long groove 509 and will not move leftward after being pressurized. Therefore, at this time, the sealing of one end of the fitting and the test after pressurizing the other end are realized. When the reciprocating lead screw 502 continues to rotate and drives the sliding seat sleeve 503 to move back to its original position, at this time, the left push rod 505 will be retracted under the elastic force of the return spring 507. When it returns to the middle value, the sliding seat sleeve 503 will abut against the right push rod 505 to control the right side to be pressurized, and the left push rod 505 will be stuck inside the long groove 509, thereby realizing the airtightness test of pressurizing the right side of the fitting again, so as to simulate the situation of double air pressure intake of air inlet and air outlet of the fitting under actual working conditions. A latch 510 is fixedly connected to the push rod 505, and the latch 510 is slidably connected in a long groove 509 opened on the sliding frame 504. One end of the push rod 505 is located inside the sleeve 506 and is connected to a return spring 507, and the left end of the return spring 507 is connected to the inner wall of the sleeve 506.

[0036] Furthermore, the display member includes a display tube 518. The bottom of the display tube 518 is communicated with the sleeve 506 through a pipeline. A piston rod 519 is slidably connected inside the display tube 518. The top of the piston rod 519 is connected with an indicating slide plate 520. One end of the indicating slide plate 520 is slidably connected in a limit groove 522 opened on the frame 1. A scale line 521 is opened on the right side of the limit groove 522. The surface of the piston rod 519 is sleeved with a pressure spring. One end of the pressure spring is connected with the bottom of the piston rod 519, and the other end of the pressure spring is connected with the top wall of the display tube 518. If the fitting leaks air, the aqueous solution inside the box body 8 will bubble. At this time, when the operator observes, he can directly judge whether the fitting product is qualified. Even if the bubbles are small and it is not easy for the operator to observe, a display member is also provided. Because when a part of the air pressure inside the sleeve 506 enters the fitting, the other part will enter the inside of the display tube 518, thus lifting the piston rod 519 and pushing the piston rod 519 to move upward, and compressing the compression spring. The elastic compression amount of the compression spring is the air pressure intensity provided inside the fitting. Because if there is air leakage in the fitting, at this time the compression spring will slowly push the piston rod 519 to move downward, and the operator can only see the indicating slide plate 520 gradually sink. At this time, it can also be judged whether there is air leakage in the fitting, so as to cope with the situation where it is not clear to observe the bubbling in water for a small hole position.

[0037] In addition, the pipeline device includes an air pipe 511. One end of the air pipe 511 is communicated with the sleeve 506, and the other end of the air pipe 511 is communicated with a connecting sleeve 512. The connecting sleeve 512 is fixed inside the frame 1. A partition plate 515 is arranged inside the rotary shaft sleeve 7. Gas passing ports 514 are symmetrically opened on the surface of the rotary shaft sleeve 7. An air vent 513 is opened in the connecting sleeve 512. The air vent 513 is communicated with the gas passing port 514 below the partition plate 515. Connecting pipes 516 are symmetrically communicated with the surface of the rotary shaft sleeve 7. The two groups of connecting pipes 516 are respectively communicated with both ends of the pipeline fitting body 6 through the positioning assembly 4. When the rotary shaft sleeve 7 rotates 180 degrees, at this time the gas passing port 514 below is communicated with the air vent 513, and the gas passing port 514 above is in contact with the inner wall of the connecting sleeve 512 to form a seal. Therefore, through the setting of the partition plate 515, it can be controlled that each time the detection assembly 5 detects only the fitting below, and the upper part is in a closed state, which will not affect the installation and disassembly of the fitting above the workbench 2.

[0038] In addition, the positioning component 4 includes a left positioning device 41 and a right positioning device 42; the left positioning device 41 and the right positioning device 42 have similar structures, only their positions are different. The left positioning device 41 includes a first frame 411, on which a first cylinder 414 and a second cylinder 416 are installed. The output end of the first cylinder 414 is connected to a first top seat 415, and a first clamping seat 417 is slidably connected to the first top seat 415 through a V-shaped groove. The first clamping seat 417 is used to clamp the left end surface of the pipe fitting body 6. The output end of the second cylinder 416 is connected to a first pushing seat 412, and a first connector 413 is installed on the first pushing seat 412. The first connector 413 abuts against the left end of the pipe fitting body 6. The first pushing seat 412 is communicated with the intake pipe 517 through a pipeline. By extending the first cylinder 414, the first top seat 415 is pushed to move, and then the first clamping seat 417 is pushed to clamp and fix the pipe fitting body 6. The main structure of the first clamping seat 417 is divided into a split structure and can slide up and down through the V-shaped groove to cope with the clamping problem caused by the curvature error of the pipe fitting body 6. A mating groove with the pipe fitting body 6 is provided inside the first clamping seat 417, so that the pipe fitting body 6 will not shift in position. Then, by controlling the extension of the second cylinder 416 again, the first pushing seat 412 is controlled to move to the right, and the first connector 413 is tightened against the left end port position of the pipe fitting body 6 to achieve tight closure. The right positioning device 42 includes a second frame 421, on which a third cylinder 422 and a fourth cylinder 423 are fixedly installed. The output end of the third cylinder 422 is connected to a connecting pipe seat 427, and a second connector 426 is connected to the connecting pipe seat 427. The second connector 426 abuts against the right end of the pipe fitting body 6. The output end of the fourth cylinder 423 is connected to a second pushing seat 424, and a second clamping seat 425 is slidably connected to the second pushing seat 424. The second clamping seat 425 is used to clamp the right end surface of the pipe fitting body 6. The connecting pipe seat 427 is connected to the pipeline device on the right side of the frame 1 through a pipeline. The right positioning device 42 also uses the same tightening principle to clamp and fix the fitting to ensure that the fitting will not be displaced during detection.

[0039] Working principle: First, it is necessary to install and position the pipeline fittings of the vehicle. The specific positioning process is as follows. The operator places the pipeline fitting body 6 on the left positioning device 41 and the right positioning device 42, and clamps and fixes the left and right ends of the pipeline fitting body 6 respectively. Then, through the elongation of the first cylinder 414, the top seat 415 is pushed to move, and then the clamping seat 417 is pushed to clamp and fix the pipeline fitting body 6. The main structure of the clamping seat 417 is a split structure and can slide up and down through the V-shaped groove to cope with the clamping problem caused by the curvature error of the pipeline fitting body 6. A mating groove with the pipeline fitting body 6 is arranged inside the clamping seat 417, so that the pipeline fitting body 6 will not shift in position. Then, by controlling the elongation of the second cylinder 416 again, the pushing seat 412 is controlled to move to the right, and the first joint 413 is tightened against the left end port position of the pipeline fitting body 6 to achieve tight sealing. The structural principle of the right positioning device 42 is the same, but the installation position is different, and the specific position is set according to the structural shape of the fitting. Therefore, after the pipeline fitting body 6 is installed and fixed, the rotation motor 3 is controlled to rotate 180 degrees, and the just-installed pipeline fitting body 6 is rotated into the interior of the box body 8, and the interior of the box body 8 is filled with an aqueous solution, so as to perform airtightness detection on the fitting. Above the rotated workbench 2, a set of positioning components 4 is also provided. Therefore, when the operator detects the fitting below, another fitting can be installed and fixed again to realize the synchronous operation of the double workstations.When the rotating shaft sleeve 7 rotates 180 degrees, the gas leakage port 514 below is then connected to the ventilation port 513. At this time, control the rotation of the drive motor 501 to drive the rotation of the reciprocating lead screw 502. The reciprocating thread grooves on the surface will drive the slide seat sleeve 503 to slide left and right reciprocally. When sliding left, it will abut against the left push rod 505 through the push piece 5032, thereby driving the left push rod 505 to perform piston-like sliding within the sleeve 506. At this time, a certain degree of air pressure will be generated inside the sleeve 506, enter the interior of the connecting sleeve 512 through the air pipe 511, then enter the interior of the rotating shaft sleeve 7 through the ventilation port 513 below, then enter the interior of the lower connecting pipe 516, and then enter the interior of the push seat one 412 through the air inlet pipe 517 and be injected into the interior of the fitting through the joint one 413. If there is air leakage in the fitting, the aqueous solution inside the box 8 will bubble. At this time, when the operator observes, he can directly judge whether the fitting product is qualified. Even if the bubbles are small and difficult for the operator to observe clearly, a display piece is also provided. Because when a part of the air pressure inside the sleeve 506 enters the fitting, the other part will enter the interior of the display tube 518, thus lifting the piston rod 519 and pushing the piston rod 519 to move upward, and compressing the compression spring (not shown in the figure). The elastic compression amount of the compression spring provides the air pressure intensity inside the fitting. Because the compression spring will provide a downward acting force on the piston rod 519 to resist the air pressure value generated by the movement of the push rod 505. If the fitting is in a sealed state, when the push rod 505 makes a piston movement, it will squeeze the piston rod 519 to move upward and compress the compression spring. Then the observer can directly judge the current air pressure value and whether there is air leakage according to the rising height of the indicating slide plate 520. Because if there is air leakage in the fitting, at this time the compression spring will slowly push the piston rod 519 to move downward, and the operator can only see the indicating slide plate 520 gradually sinking. At this time, it can also be judged whether there is air leakage in the fitting, so as to deal with the situation where it is not clear whether there are bubbles in the water for small holes. Although the right end of the fitting is connected by a pipe at this time, the pin 510 provided on the right push rod 505 will be stuck at the position of the long groove 509 and will not move leftward after being pressurized. So at this time, the detection of plugging one end of the fitting and pressurizing the other end is realized. When the reciprocating lead screw 502 continues to rotate and drives the slide seat sleeve 503 to move back to its original position, at this time the left push rod 505 will be reset by the elastic force of the return spring 507. When returning to the middle value, the slide seat sleeve 503 will abut against the right push rod 505 to control the right side to be pressurized, and the left push rod 505 will be stuck inside the long groove 509, thus realizing the airtightness detection of pressurizing the right side of the fitting again, so as to simulate the situation of double air pressure intake of air inlet and air outlet of the fitting under actual working conditions. And the operator can set the number of cycles according to the detection requirements, thereby improving the accuracy of the airtightness detection of the fitting.After the detection is completed, the flipping of the workbench 2 is controlled. The operator marks the qualified and unqualified parts after detection and takes them out, and then installs and detects another group of parts again, and so on, so as to improve the efficiency and accuracy of the entire automotive pipeline parts.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

Claims

1. An airtightness inspection device for automobile pipelines, characterized in that, including a frame (1); a workbench (2); a pipeline fitting body (6); a positioning component (4) for detecting and positioning the pipeline fitting body (6); a detection component (5) for performing a pressurized movable airtightness detection on the pipeline fitting body (6); a rotating motor (3) is fixedly installed inside the frame (1), a rotating shaft sleeve (7) is fixedly connected to the output shaft of the rotating motor (3), the rotating shaft sleeve (7) is connected to the workbench (2) through a connecting member, two groups of the positioning components (4) are provided, and the two groups of positioning components (4) are respectively arranged on the upper and lower surfaces of the workbench (2), and a box body (8) is arranged inside the frame (1).

2. The airtightness inspection device for an automotive pipeline according to claim 1, wherein: The detection component (5) includes a movable part and a display part, The movable part includes a driving motor (501), the output end of the driving motor (501) is connected with a reciprocating lead screw (502), a sliding seat sleeve (503) is slidably connected to the reciprocating lead screw (502), a sliding frame (504) is slidably connected to the sliding seat sleeve (503), a sleeve (506) is arranged on the sliding frame (504), and a push rod (505) is slidably connected inside the sleeve (506).

3. The airtightness inspection device for an automotive pipeline according to claim 2, wherein: Two groups of the sleeve (506) and the push rod (505) are provided, and the two groups of the sleeve (506) and the push rod (505) are symmetrically distributed with the center line of the reciprocating lead screw (502) as the axis of symmetry. One ends of the two groups of the sleeve (506) are respectively connected to the two ends of the pipeline fitting body (6) through pipeline devices.

4. An airtightness inspection device for an automotive pipeline according to claim 2, characterized in that: A pin rod (5031) is fixedly connected inside the sliding seat sleeve (503), the pin rod (5031) slides in a spiral groove on the surface of the reciprocating lead screw (502), a push piece (5032) is fixedly connected to the surface of the sliding seat sleeve (503), and the push piece (5032) slides in a square groove (508) opened on the sliding frame (504).

5. An airtightness inspection device for an automobile pipeline according to claim 2, characterized in that: A retaining pin (510) is fixedly connected to the push rod (505), the retaining pin (510) slides in a long groove (509) opened on the sliding frame (504), one end of the push rod (505) is located inside the sleeve (506) and is connected with a return spring (507), and the left end of the return spring (507) is connected with the inner wall of the sleeve (506).

6. The airtightness inspection device for an automotive pipeline according to claim 2, wherein: The display part includes a display tube (518), the bottom of the display tube (518) is communicated with the sleeve (506) through a pipeline, a piston rod (519) is slidably connected inside the display tube (518), the top of the piston rod (519) is connected with an indicating slide plate (520), one end of the indicating slide plate (520) slides in a limiting groove (522) opened on the frame (1), a scale line (521) is opened on the right side of the limiting groove (522), a pressure spring is sleeved on the surface of the piston rod (519), one end of the pressure spring is connected with the bottom of the piston rod (519), and the other end of the pressure spring is connected with the top wall of the display tube (518).

7. An airtightness inspection device for an automotive pipeline according to claim 3, characterized in that: The pipeline device includes an air pipe (511). One end of the air pipe (511) is communicated with a sleeve (506), and the other end of the air pipe (511) is communicated with a connecting sleeve (512). The connecting sleeve (512) is fixed in the frame (1). A partition (515) is arranged inside the rotating shaft sleeve (7). Air vent holes (514) are symmetrically formed on the surface of the rotating shaft sleeve (7). An air vent (513) is formed in the connecting sleeve (512). The air vent (513) is communicated with the air vent holes (514) below the partition (515). Connecting pipes (516) are symmetrically communicated with the surface of the rotating shaft sleeve (7). The two groups of connecting pipes (516) are respectively communicated with both ends of the pipeline fitting body (6) through positioning components (4).

8. An airtightness inspection device for an automotive pipeline according to claim 7, characterized in that: The positioning component (4) includes a left positioning device (41) and a right positioning device (42); The left positioning device (41) includes a first frame (411). A first cylinder (414) and a second cylinder (416) are installed on the first frame (411). The output end of the first cylinder (414) is connected with a first top seat (415). A first clamping seat (417) is slidably connected to the first top seat (415) through a V-shaped groove. The first clamping seat (417) is used for clamping the left end surface of the pipeline fitting body (6). The output end of the second cylinder (416) is connected with a first pushing seat (412). A first connector (413) is installed on the first pushing seat (412). The first connector (413) abuts against the left end of the pipeline fitting body (6). The first pushing seat (412) is communicated with an air inlet pipe (517) through a pipeline.

9. The airtightness inspection device for an automotive pipeline according to claim 8, characterized in that: The right positioning device (42) includes a second frame (421). A third cylinder (422) and a fourth cylinder (423) are fixedly installed on the second frame (421). The output end of the third cylinder (422) is connected with a connecting pipe seat (427). A second connector (426) is connected to the connecting pipe seat (427). The second connector (426) abuts against the right end of the pipeline fitting body (6). The output end of the fourth cylinder (423) is connected with a second pushing seat (424). A second clamping seat (425) is slidably connected to the second pushing seat (424). The second clamping seat (425) is used for clamping the right end surface of the pipeline fitting body (6). The connecting pipe seat (427) is connected with the pipeline device on the right side of the frame (1) through a pipeline.

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