A pipe fitting airtightness detection device

Abstract

The present invention discloses a pipe air tightness detection device, comprising a pressure supply mechanism, wherein the outer end face of the pressure supply mechanism is fixedly connected with a plurality of support components, the support components are used to limit the pressure supply mechanism in the middle of the pipeline to be tested, the end of the pressure supply mechanism is provided with a sealing mechanism for fitting with the inner wall of the pipeline to be tested to form a closed space, the outer end face of the sealing mechanism is provided with a plurality of cleaning components for cleaning the inner wall of the pipeline to be tested, and the end of the sealing mechanism away from the pressure supply mechanism is provided with a driving mechanism for closing and rotating the sealing mechanism. The invention can detect a part of the pipeline to be tested, thereby improving the detection accuracy and flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and in particular to a pipe air tightness detection device. Background Art

[0002] The air tightness test is a test method that introduces compressed gas into the pipeline system and determines whether the pipeline system is leaking by detecting the gas pressure or gas leakage in the pipeline system. The purpose of the air tightness test is to find small leaks in the pipeline system so that timely measures can be taken to repair them, thereby ensuring the safe operation of the pipeline system.

[0003] Chinese patent publication number CN1690676A, a method for detecting air tightness of sewage pipes, a pipe plug is installed at each end of the sewage pipe section to be tested; an inflator is used to inflate the annular inflatable ring to make the air pressure in the annular inflatable ring reach a predetermined pressure, a compressor is used to inflate the sewage pipe section to be tested, and when the gas pressure in the pipe section reaches 3000pa, the inflation is stopped, and the pipe plug is kept leak-free, and the gas pressure in the sewage pipe section to be tested is maintained for 5 minutes, and the detection is completed, and the pipe plug is removed. The present invention has the advantages of being very convenient to install and disassemble, and can save a lot of water resources.

[0004] The existing detection device can only perform detection by blocking both ends and then inflating and supplying pressure. It is unable to perform local detection on the pipeline, and thus is unable to accurately locate the leakage position. In addition, it is sealed by an inflatable ring, and the pressure-bearing capacity in the detection area is weak. At the same time, if there is debris attached to the inner wall of the pipeline, the airtightness of the inflatable ring is difficult to ensure, affecting the accuracy of the airtightness detection.

[0005] Therefore, it is necessary to provide a pipe air tightness detection device to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a pipe air tightness detection device to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pipe air tightness detection device, comprising a pressure supply mechanism, the outer end face of the pressure supply mechanism is fixedly connected to a plurality of support components, the support components are used to limit the pressure supply mechanism in the middle of the pipeline to be tested, the end of the pressure supply mechanism is provided with a sealing mechanism for fitting with the inner wall of the pipeline to be tested to form a closed space, the outer end face of the sealing mechanism is provided with a plurality of cleaning components for cleaning the inner wall of the pipeline to be tested, and the end of the sealing mechanism away from the pressure supply mechanism is provided with a driving mechanism for driving the sealing mechanism to close and rotate.

[0008] As a further solution of the present invention, the sealing mechanism includes an extended sealing plate, a movable cavity, and a sealing plate. The sealing plate is fixedly connected to the end of the pressure supply mechanism. The movable cavity is opened inside the sealing plate. There are multiple groups of the extended sealing plates, and multiple groups of the extended sealing plates are elastically embedded inside the movable cavity. A driven assembly for driving the extended sealing plate to extend out of the movable cavity is provided inside the movable cavity.

[0009] Further, there are multiple groups of the extended sealing plates. The extended sealing plates are fan-shaped and are arc-shaped and fitted to the inside of the pipeline to be measured. The extended sealing plates can be made of materials such as rubber to improve their sealing effect.

[0010] As a further solution of the present invention, the cleaning assembly includes a telescopic plate and a cleaning scraper. There are two groups of the telescopic plates, and two groups of the telescopic plates are elastically embedded inside the sealing plate. The telescopic plates are arranged at the gaps between multiple groups of extended sealing plates. A rotating rod is provided between the telescopic plates. The cleaning scraper is elastically arranged on the outer end face of the rotating rod.

[0011] Further, the length of the cleaning scraper and the width of the telescopic plate can be appropriately increased as needed. The ends of the cleaning scraper and the telescopic plate are arc-shaped. The extended sealing plate can be provided with a fitting groove adapted to the cleaning scraper. The rotating shaft and the cleaning scraper can be elastically connected by an elastic member such as a torsion spring. And the rotation angle between the rotating rod and the cleaning scraper is an acute angle relative to the tangent direction of the outer end face of the sealing plate, so as to improve the cleaning effect of the cleaning scraper on the inner wall of the pipeline to be measured and prevent the cleaning scraper from reversing excessively.

[0012] As a further solution of the present invention, a sliding cavity is provided inside the pressure supply mechanism. A rotating shaft driven by a driving mechanism penetrates through the middle of the sliding cavity. A sliding sealing plate is slidably connected inside the sliding cavity. The sliding sealing plate is threadedly engaged with the rotating shaft through a threaded groove. A limiting slider is fixedly connected to the outer end face of the sliding sealing plate. A limiting groove adapted to the limiting slider is provided on the inner wall of the sliding cavity. An air outlet communicated with the sliding cavity is provided in the middle of the pressure supply mechanism. An air inlet communicated with the sliding cavity is opened on the sealing mechanism.

[0013] Further, there are two groups of the sliding sealing plates, and two groups of the sliding sealing plates are symmetrically arranged inside the sliding cavity. The threaded grooves on the surface of the rotating shaft are symmetrically arranged.

[0014] As a further solution of the present invention, the driven assembly includes an inclined plane block and a damping telescopic rod. The damping telescopic rod is fixedly connected to one side of the sliding sealing plate. The inclined plane block is arranged inside the movable cavity. The inclined plane block is fixedly connected to the damping telescopic rod. The extended sealing plate is provided with a driving push rod for the inclined plane block.

[0015] Further, the extended sealing plate is elastically arranged inside the movable cavity, and the driving abutting rod is elastically attached to the inclined surface of the inclined block.

[0016] As a further solution of the present invention, the driving mechanism includes a shield, a driven gear, a driving gear and a rotating cavity. The shield is fixedly connected to the side of the sealing mechanism away from the pressure supply mechanism. The rotating cavity is opened inside the shield. The rotating shaft is arranged through the middle of the rotating cavity. The driving gear is fixedly connected to the outer end of the rotating shaft. The driven gear is slidably connected inside the rotating cavity, and the driven gear meshes with the driving gear. Tooth grooves meshing with the driven gear are arranged on the inner wall of the shield.

[0017] Further, multiple groups of driven gears are provided and are symmetrically arranged in a ring inside the rotating cavity.

[0018] As a further solution of the present invention, an extended pin rod is arranged in the middle of the driven gear, and the extended pin rod is fixedly connected to the end of the damping telescopic rod away from the sliding sealing plate.

[0019] As a further solution of the present invention, the support assembly includes a socket cavity, a support rod, an anti-slip member and a socket rod. The support rod is fixedly connected to the outer end face of the pressure supply mechanism. The socket cavity is opened inside the support rod. The socket rod is elastically embedded inside the socket cavity. The anti-slip member is fixedly connected to the end of the socket rod away from the socket cavity. The socket cavity is communicated with the middle of the pressure supply mechanism through a communication hole.

[0020] When the present invention is in use, the pressure supply mechanism is arranged in the middle of the pipeline to be tested through the support assembly. The device can be arranged in any area inside the pipeline, and thus the air tightness of any position inside the pipeline can be detected. Therefore, the leakage position can be checked more precisely. The driving mechanism drives the sealing mechanism to rotate, thereby driving the cleaning assembly to rotate to clean the inner wall of the pipeline to be tested, avoiding the influence of attached sundries and the like inside the pipeline to be tested on the sealing effect of the sealing mechanism. Moreover, the driving mechanism can also drive the sealing mechanism to close both ends of the pressure supply mechanism, so that a sealed space is formed between the pressure supply mechanism and the pipeline to be tested. By pressurizing the sealed space and observing the pressure change, the air tightness of the pipeline to be tested in the corresponding area of the pressure supply mechanism can be detected. The device is simple to operate and is not affected by the state of the pipeline to be tested. Description of the Drawings

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 is the overall schematic diagram of the present invention;

[0023] Figure 2 is the internal structure schematic diagram of the present invention;

[0024] Figure 3It is a schematic structural diagram of the cleaning component of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the sealing mechanism of the present invention in the sealed state;

[0026] Figure 5 It is a schematic internal structural diagram of the sealing mechanism of the present invention in the sealed state;

[0027] Figure 6 It is a schematic cross-sectional structural diagram of the present invention;

[0028] Figure 7 It is of the present invention Figure 6 Schematic enlarged structure diagram of A therein;

[0029] Figure 8 It is a schematic structural diagram of the driven component of the present invention;

[0030] Figure 9 It is of the present invention Figure 6 Schematic enlarged structure diagram of C therein;

[0031] Figure 10 It is a schematic internal structural diagram of the driving mechanism of the present invention;

[0032] Figure 11 It is a schematic structural diagram of the sliding sealing plate of the present invention;

[0033] Figure 12 It is of the present invention Figure 6 Schematic enlarged structure diagram of B therein.

[0034] In the figure: 1. Support component; 2. Pressure supply mechanism; 3. Air outlet; 4. Sealing mechanism; 5. Driving mechanism; 6. Air inlet; 7. Cleaning component; 8. Pipeline to be measured; 9. Fitting groove; 10. Extended sealing plate; 11. Driving abutting rod; 12. Rotating shaft; 13. Activity cavity; 14. Sealing plate; 15. Telescopic plate; 16. Rotating rod; 17. Cleaning scraper; 20. Driven component; 21. Sliding cavity; 22. Thread groove; 23. Sliding sealing plate; 24. Inclined plane block; 25. Protective cover; 26. Extended pin rod; 27. Damping telescopic rod; 28; Driven gear; 29. Driving gear; 30. Rotating cavity; 31. Limit slider; 33. Communication hole; 34. Socket cavity; 35. Support rod; 36. Anti-slip member; 37. Socket rod. Detailed implementation manners

[0035] Embodiment 1

[0036] As Figure 1As shown in the figure, a pipe fitting airtightness detection device includes a pressure supply mechanism 2. Multiple groups of support components 1 are fixedly connected to the outer end face of the pressure supply mechanism 2. The support components 1 are used to limit the pressure supply mechanism 2 in the middle of the pipeline to be tested 8. A sealing mechanism 4 for fitting with the inner wall of the pipeline to be tested 8 to form a sealed space is provided at the end of the pressure supply mechanism 2. Multiple groups of cleaning components 7 for cleaning the inner wall of the pipeline to be tested 8 are provided on the outer end face of the sealing mechanism 4. A driving mechanism 5 for driving the sealing mechanism 4 to close and rotate is provided at one end of the sealing mechanism 4 away from the pressure supply mechanism 2.

[0037] Furthermore, multiple groups of support components 1 and cleaning components 7 are provided, and the support components 1 and cleaning components 7 are symmetrically arranged uniformly along the outer surfaces of the pressure supply mechanism 2 and the sealing mechanism 4.

[0038] During use, the pressure supply mechanism 2 is arranged in the middle of the pipeline to be tested 8 through the support components 1. The device can be arranged in any area inside the pipeline, and thus the airtightness of any position inside the pipeline can be detected, so that the leakage position can be checked more precisely. The driving mechanism 5 drives the sealing mechanism 4 to rotate, thereby driving the cleaning components 7 to rotate to clean the inner wall of the pipeline to be tested 8, avoiding the influence of attached sundries inside the pipeline to be tested 8 on the sealing effect of the sealing mechanism 4. Moreover, the driving mechanism 5 can also drive the sealing mechanism 4 to close both ends of the pressure supply mechanism 2, so that a sealed space is formed between the pressure supply mechanism 2 and the pipeline to be tested 8. By pressurizing the sealed space and observing the pressure change, the airtightness of the pipeline to be tested 8 in the corresponding area of the pressure supply mechanism 2 can be detected. The device is easy to operate and is not affected by the state of the pipeline to be tested 8.

[0039] Embodiment 2

[0040] On the basis of Embodiment 1, as Figure 1 - Figure 2 and Figure 5 shown in the figure, the sealing mechanism 4 includes an extended sealing plate 10, a movable cavity 13 and a sealing plate 14. The sealing plate 14 is fixedly connected to the end of the pressure supply mechanism 2. The movable cavity 13 is opened inside the sealing plate 14. Multiple groups of extended sealing plates 10 are provided. Multiple groups of extended sealing plates 10 are elastically embedded inside the movable cavity 13. A driven component 20 for driving the extended sealing plates 10 to extend out of the movable cavity 13 is provided inside the movable cavity 13.

[0041] Furthermore, multiple groups of extended sealing plates 10 are provided. The extended sealing plates 10 are fan-shaped and are arc-shaped and fitted with the inside of the pipeline to be tested 8. The extended sealing plates 10 can be made of materials such as rubber to improve their sealing effect.

[0042] During use, through the provision of multiple groups of extended sealing plates 10, the extended sealing plates 10 can extend out of the inside of the movable cavity 13 and abut against the inner wall of the pipeline to be tested 8 under the drive of the driven component 20.

[0043] AsFigure 1 - Figure 4 As shown in Figure 4 , the cleaning assembly 7 includes a telescopic plate 15 and a cleaning scraper 17. There are two groups of telescopic plates 15. The two groups of telescopic plates 15 are elastically embedded inside the sealing plate 14. The telescopic plates 15 are arranged at the gaps between multiple groups of extended sealing plates 10. A rotating rod 16 is arranged between the telescopic plates 15. The cleaning scraper 17 is elastically arranged on the outer end face of the rotating rod 16.

[0044] Furthermore, the length of the cleaning scraper 17 and the width of the telescopic plate 15 can be appropriately increased as needed. The ends of the cleaning scraper 17 and the telescopic plate 15 are arc-shaped. The extended sealing plate 10 can be provided with a fitting groove 9 adapted to the cleaning scraper 17. The rotating rod 16 and the cleaning scraper 17 can be elastically connected through an elastic member such as a torsion spring. And the rotation angle between the rotating rod 16 and the cleaning scraper 17 is an acute angle relative to the tangent direction of the outer end face of the sealing plate 14, so as to improve the cleaning effect of the cleaning scraper 17 on the inner wall of the pipeline 8 to be measured and prevent the cleaning scraper 17 from reversing excessively.

[0045] During use, after the pressure supply mechanism 2 is fixed inside the pipeline 8 to be measured, the cleaning scraper 17 inside the cleaning assembly 7 fits against the inner wall of the pipeline 8 to be measured under the action of elastic force. The sealing mechanism 4 rotates under the drive of the drive mechanism 5, driving the cleaning scraper 17 to rotate along the inner wall of the pipeline 8 to be measured, so as to pre-clean the positions where the sealing mechanism 4 needs to fit against the inner wall of the pipeline 8 to be measured. And the telescopic plates 15 are arranged at the adjacent gaps of the extended sealing plates 10. When the extended sealing plates 10 extend out of the movable cavity 13 and fit with the extended sealing plates 10, gaps will be generated between the extended sealing plates 10. When the extended sealing plates 10 extend out, they will press the cleaning scraper 17, so that the cleaning scraper 17 and the telescopic plates 15 fit against the inner wall of the extended sealing plates 10. The telescopic plates 15 can seal the gaps generated by the extension between the extended sealing plates 10, so that the sealing mechanism 4 fits tightly against the inner wall of the pipeline 8 to be measured, and further forms a sealed cavity between the pressure supply mechanism 2 and the pipeline 8 to be measured.

[0046] As Figure 1 - Figure 2 、 Figure 5 - Figure 6 and Figure 11 As shown in Figure 5 , Figure 6 and Figure 11 , a sliding cavity 21 is provided inside the pressure supply mechanism 2. A rotating shaft 12 driven by the drive mechanism 5 runs through the middle of the sliding cavity 21. A sliding sealing plate 23 is slidably connected inside the sliding cavity 21. The sliding sealing plate 23 is threadedly engaged with the rotating shaft 12 through a threaded groove 22. A limiting slider 31 is fixedly connected to the outer end face of the sliding sealing plate 23. A limiting groove adapted to the limiting slider 31 is provided on the inner wall of the sliding cavity 21. An air outlet 3 communicating with the sliding cavity 21 is provided in the middle of the pressure supply mechanism 2. An air inlet 6 communicating with the sliding cavity 21 is provided on the sealing mechanism 4.

[0047] Further, there are two sets of sliding sealing plates 23, which are symmetrically arranged inside the sliding cavity 21, and the threaded grooves 22 on the surface of the rotating shaft 12 are symmetrically arranged.

[0048] During use, after the sealing mechanism 4 seals the pipeline 8 to be tested, the driving mechanism 5 (such as a motor) drives the rotating shaft 12 to rotate. While the rotating shaft 12 rotates, it will drive the movement of the sliding sealing plate 23 through the threaded groove 22, so that the internal gas pressure of the sliding cavity 21 is discharged through the air outlet 3 into the gap between the pressure supply mechanism 2 and the pipeline 8 to be tested, thereby pressurizing between the pressure supply mechanism 2 and the pipeline 8 to be tested. A pressure sensor can be provided on the outer surface of the pressure supply mechanism 2, and the local airtightness of the pipeline 8 to be tested can be judged by the pressure change.

[0049] As Figure 1 - Figure 8 As shown in the figure, the driven assembly 20 includes an inclined plane block 24 and a damping telescopic rod 27. The damping telescopic rod 27 is fixedly connected to one side of the sliding sealing plate 23. The inclined plane block 24 is arranged inside the movable cavity 13. The inclined plane block 24 is fixedly connected to the damping telescopic rod 27. The extending sealing plate 10 is provided with a driving abutting rod 11 for the inclined plane block 24.

[0050] Further, the extending sealing plate 10 is elastically arranged inside the movable cavity 13, and the driving abutting rod 11 is elastically attached to the inclined surface of the inclined plane block 24.

[0051] During use, when the rotating shaft 12 drives the sliding sealing plate 23 to move horizontally, it drives the damping telescopic rod 27 to move horizontally synchronously. The driven assembly 20 drives the extending sealing plate 10 to extend out of the movable cavity 13 through the abutment between the inclined plane block 24 and the driving abutting rod 11.

[0052] As Figure 1 - Figure 12 As shown in the figure, the driving mechanism 5 includes a shield 25, a driven gear 28, a driving gear 29 and a rotating cavity 30. The shield 25 is fixedly connected to the side of the sealing mechanism 4 away from the pressure supply mechanism 2. The rotating cavity 30 is opened inside the shield 25. The rotating shaft 12 is arranged through the middle of the rotating cavity 30. The driving gear 29 is fixedly connected to the outer end of the rotating shaft 12. The driven gear 28 is slidably connected inside the rotating cavity 30, and the driven gear 28 meshes with the driving gear 29. The inner wall of the shield 25 is provided with a tooth groove meshing with the driven gear 28.

[0053] Further, there are multiple sets of driven gears 28, which are symmetrically arranged in a ring inside the rotating cavity 30.

[0054] During use, the rotating shaft 12 is driven to rotate by a motor or the like. While the rotating shaft 12 rotates, it drives the rotating cavity 30 to rotate synchronously through the transmission of the driving gear 29 and the driven gear 28.

[0055] As Figure 1-12As shown, an extension pin rod 26 is provided in the middle of the driven gear 28, and the extension pin rod 26 is fixedly connected to one end of the damping telescopic rod 27 away from the sliding sealing plate 23.

[0056] During use, at the initial stage of the rotation of the rotating shaft 12, it is first necessary to drive the sealing mechanism 4 to rotate. The extension pin rod 26 is fixedly connected to one end of the damping telescopic rod 27, so that the driven gear 28 can only rotate within the rotation cavity 30. Therefore, the rotation of the rotating shaft 12 will drive the shroud 25 through the driven gear 28 and the driving gear 29 to drive the sealing mechanism 4 to rotate, so as to complete the cleaning of the inner wall of the pipeline 8 to be measured. As the rotating shaft 12 continues to rotate, the damping telescopic rod 27 drives the inclined block 24 and the extension pin rod 26 to move horizontally. The inclined block 24 will drive the extension sealing plate 10 to extend for sealing. When the extension sealing plate 10 fits with the inner wall of the pipeline 8 to be measured, the sealing mechanism 4 stops rotating, and the extension pin rod 26 will be disengaged from the inside of the driven gear 28. At this time, the driven gear 28 revolves around the rotating shaft 12 within the rotation cavity 30 under the drive of the rotating shaft 12, and the shroud 25 stops rotating. At this time, the inside of the pipeline 8 to be measured is sealed. The damping telescopic rod 27 has a certain telescopic damping, and its damping size is set according to the driving force of the inclined block 24 on the extension sealing plate 10. At this time, the rotating shaft 12 continues to rotate, and the sliding sealing plate 23 continues to move horizontally. At this time, the sliding sealing plate 23 will be used to pressurize between the pressure supply mechanism 2 and the pipeline 8 to be measured until the rotating shaft 12 stops rotating after reaching the specified pressure.

[0057] As Figure 1 - Figure 12 As shown, the support assembly 1 includes a socket cavity 34, a support rod 35, an anti-slip member 36 and a socket rod 37. The support rod 35 is fixedly connected to the outer end face of the pressure supply mechanism 2. The socket cavity 34 is opened inside the support rod 35. The socket rod 37 is elastically embedded inside the socket cavity 34. The anti-slip member 36 is fixedly connected to one end of the socket rod 37 away from the socket cavity 34. The socket cavity 34 is communicated with the middle of the pressure supply mechanism 2 through a communication hole 33.

[0058] During use, the socket rod 37 is elastically embedded inside the support rod 35. The socket rod 37 abuts against the inner wall of the pipeline 8 to be measured through elastic force. Through multiple sets of support assemblies 1, the pressure supply mechanism 2 is suspended in the middle of the pipeline 8 to be measured, and the anti-slip member 36 can be set as rubber or a metal cone according to the material of the pipeline 8 to be measured. The socket cavity 34 is communicated with the communication hole 33. When the pressure inside the pressure supply mechanism 2 increases, the pressure inside the socket cavity 34 will also increase synchronously, so as to synchronously improve the fixing effect of the anti-slip member 36.

[0059] Working principle: The pressure supply mechanism 2 is arranged in the middle of the pipeline to be tested 8 through the support component 1. The device can be arranged in any area inside the pipeline, and thus the airtightness of any position inside the pipeline can be detected. Therefore, the leakage position can be more precisely checked. The driving mechanism 5 drives the sealing mechanism 4 to rotate, thereby driving the cleaning component 7 to rotate to clean the inner wall of the pipeline to be tested 8, avoiding the influence of debris attached inside the pipeline to be tested 8 on the sealing effect of the sealing mechanism 4. Moreover, the driving mechanism 5 can also drive the sealing mechanism 4 to close the two ends of the pressure supply mechanism 2, so as to form a sealed space between the pressure supply mechanism 2 and the pipeline to be tested 8. By pressurizing the sealed space and observing the pressure change, the airtightness of the pipeline to be tested 8 in the corresponding area of the pressure supply mechanism 2 can be detected. The device is easy to operate and is not affected by the state of the pipeline to be tested 8. By providing multiple groups of extended sealing plates 10, the extended sealing plates 10 can extend from the inside of the moving cavity 13 and abut against the inner wall of the pipeline to be tested 8 under the drive of the driven component 20. After the pressure supply mechanism 2 is fixed inside the pipeline to be tested 8, the cleaning scraper 17 inside the cleaning component 7 fits against the inner wall of the pipeline to be tested 8 under the action of elastic force. The sealing mechanism 4 rotates under the drive of the driving mechanism 5, driving the cleaning scraper 17 to rotate along the inner wall of the pipeline to be tested 8, so as to pre-clean the position where the sealing mechanism 4 needs to fit against the inner wall of the pipeline to be tested 8. Moreover, the telescopic plate 15 is arranged at the adjacent gap of the extended sealing plates 10. When the extended sealing plates 10 extend from the inside of the moving cavity 13 and fit against each other, a gap will be generated between the extended sealing plates 10. When the extended sealing plates 10 extend, they will press the cleaning scraper 17, so that the cleaning scraper 17 and the telescopic plate 15 fit against the inner wall of the extended sealing plates 10. The telescopic plate 15 can seal the gap generated when the extended sealing plates 10 extend, so that the sealing mechanism 4 fits tightly against the inner wall of the pipeline to be tested 8, and thus a sealed cavity is formed between the pressure supply mechanism 2 and the pipeline to be tested 8. After the sealing mechanism 4 closes the pipeline to be tested 8, the driving mechanism 5, such as a motor, drives the rotating shaft 12 to rotate. While the rotating shaft 12 rotates, it will drive the movement of the sliding sealing plate 23 through the thread groove 22, so as to discharge the gas pressure inside the sliding cavity 21 through the air outlet 3 into the gap between the pressure supply mechanism 2 and the pipeline to be tested 8, thereby pressurizing the space between the pressure supply mechanism 2 and the pipeline to be tested 8. The local airtightness of the pipeline to be tested 8 can be judged by the pressure change through a pressure sensor arranged on the outer surface of the pressure supply mechanism 2. While the rotating shaft 12 drives the sliding sealing plate 23 to move horizontally, it drives the damping telescopic rod 27 to move horizontally synchronously. The driven component 20 drives the extended sealing plates 10 to extend from the inside of the moving cavity 13 through the abutment of the inclined plane block 24 and the driving rod 11. The rotating shaft 12 is driven to rotate by a motor or the like. While the rotating shaft 12 rotates, it drives the rotating cavity 30 to rotate synchronously through the transmission of the driving gear 29 and the driven gear 28. At the initial stage of the rotation of the rotating shaft 12, it is necessary to drive the sealing mechanism 4 to rotate first. The extended pin rod 26 is fixedly connected to one end of the damping telescopic rod 27, so that the driven gear 28 can only rotate within the rotating cavity 30.Thus, the rotation of the rotating shaft 12 will drive the shroud 25 through the driven gear 28 and the driving gear 29 to drive the sealing mechanism 4 to rotate, thereby completing the cleaning of the inner wall of the pipeline 8 to be measured. As the rotating shaft 12 continues to rotate, the damping telescopic rod 27 drives the inclined block 24 and the extension pin rod 26 to move horizontally. The inclined block 24 will drive the extension sealing plate 10 to extend out for closing. When the extension sealing plate 10 fits against the inner wall of the pipeline 8 to be measured, the sealing mechanism 4 stops rotating. The extension pin rod 26 will disengage from the inside of the driven gear 28. At this time, the driven gear 28 revolves around the rotating shaft 12 inside the rotating cavity 30 under the drive of the rotating shaft 12, and the shroud 25 stops rotating. At this time, the inside of the pipeline 8 to be measured is closed. The damping telescopic rod 27 has a certain telescopic damping, and its damping magnitude is set according to the driving force magnitude of the inclined block 24 on the extension sealing plate 10. At this time, the rotating shaft 12 continues to rotate, and the sliding sealing plate 23 continues to move horizontally. At this time, the sliding sealing plate 23 will be used to pressurize between the pressure supply mechanism 2 and the pipeline 8 to be measured until the rotating shaft 12 stops rotating after reaching the specified pressure. The socket rod 37 is elastically embedded inside the support rod 35, and the socket rod 37 abuts against the inner wall of the pipeline 8 to be measured through elasticity. Through multiple sets of support components 1, the pressure supply mechanism 2 is suspended in the middle of the pipeline 8 to be measured, and the anti-slip member 36 can be set as rubber or a metal cone according to the material of the pipeline 8 to be measured. The socket cavity 34 is communicated with the communication hole 33. When the pressure inside the pressure supply mechanism 2 increases, the pressure inside the socket cavity 34 will also increase synchronously, thereby synchronously improving the fixing effect of the anti-slip member 36.,

Claims

1. A pipe air tightness detection device, comprising a pressure supply mechanism, characterized in that: The outer end surface of the pressure supply mechanism is fixedly connected with multiple groups of supporting components, and the supporting components are used to limit the pressure supply mechanism in the middle of the pipeline to be tested, and the end of the pressure supply mechanism is provided with a sealing mechanism for fitting with the inner wall of the pipeline to be tested to form a closed space, and the outer end surface of the sealing mechanism is provided with multiple groups of cleaning components for cleaning the inner wall of the pipeline to be tested, and the end of the sealing mechanism away from the pressure supply mechanism is provided with a driving mechanism that drives the sealing mechanism to close and rotate; the sealing mechanism includes an extended sealing plate, a movable cavity and a sealing plate, and the interior of the movable cavity is provided with a driven component that drives the extended sealing plate to extend out of the movable cavity, and the interior of the pressure supply mechanism is provided with a sliding cavity, and the middle part of the sliding cavity is penetrated by a rotating shaft driven to rotate by the driving mechanism, and the interior of the sliding cavity is slidably connected with a sliding sealing plate, and the sliding sealing plate is threadedly meshed with the rotating shaft through a threaded groove, and the outer end surface of the sliding sealing plate is fixedly connected with a limiting slider, and the inner wall of the sliding cavity is provided with a limiting groove that matches the limiting slider. The middle part of the pressure supply mechanism is provided with an air outlet connected to the sliding chamber, and the sealing mechanism is provided with an air inlet connected to the sliding chamber; the driven assembly includes a ramp block and a damping telescopic rod, the damping telescopic rod is fixedly connected to one side of the sliding sealing plate, the ramp block is arranged inside the movable chamber, the ramp block is fixedly connected to the damping telescopic rod, and the extension sealing plate is provided with a driving push rod connected to the ramp block; the driving mechanism includes a shield, a driven gear, a driving gear and a rotating chamber, the shield is fixedly connected to the side of the sealing mechanism away from the pressure supply mechanism, the rotating chamber is opened inside the shield, the rotating shaft is arranged through the middle part of the rotating chamber, the driving gear is fixedly connected to the outer end of the rotating shaft, the driven gear is slidably connected to the inside of the rotating chamber, and the driven gear is meshed with the driving gear, and the inner wall of the shield is provided with a tooth groove meshing with the driven gear; the middle part of the driven gear is provided with an extension pin, and the extension pin is fixedly connected to the end of the damping telescopic rod away from the sliding sealing plate.

2. A pipe air tightness detection device according to claim 1, characterized in that: The sealing plate is fixedly connected to the end of the pressure supply mechanism, the active cavity is opened inside the sealing plate, and the extended sealing plates are provided in multiple groups, and the multiple groups of extended sealing plates are elastically embedded in the active cavity.

3. A pipe air tightness detection device according to claim 2, characterized in that: The cleaning assembly includes a telescopic plate and a cleaning scraper. The telescopic plates are provided in two groups. The two groups of telescopic plates are elastically embedded in the interior of the sealing plate. The telescopic plates are arranged in the gaps between multiple groups of extended sealing plates. A rotating shaft is provided between the telescopic plates, and the cleaning scraper is elastically arranged on the outer end surface of the rotating shaft.

4. A pipe air tightness detection device according to claim 1, characterized in that: The support assembly includes a sleeve cavity, a support rod, an anti-slip part and a sleeve rod. The support rod is fixedly connected to the outer end surface of the pressure supply mechanism, the sleeve cavity is opened inside the support rod, the sleeve rod is elastically embedded in the sleeve cavity, the anti-slip part is fixedly connected to one end of the sleeve rod away from the sleeve cavity, and the sleeve cavity is connected with the middle part of the pressure supply mechanism through a connecting hole.

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