Air tightness detection device for metal bellows

Abstract

The invention discloses a metal bellows airtightness detection device, and relates to the technical field of pipeline detection, the metal bellows airtightness detection device comprises a water tank and at least one detection module, the detection module can be located in the water tank, and the detection module comprises a linear driving structure, a first sealing structure and a second sealing structure, the linear driving structure is used for driving the first sealing structure and / or the second sealing structure to move so as to change the distance between the first sealing structure and the second sealing structure, the first sealing structure comprises a first inflatable sealing ring, the first inflatable sealing ring is used for sealing one end of a to-be-detected pipeline, and the first inflatable sealing ring is used for sealing the other end of the to-be-detected pipeline. The second sealing structure comprises a second inflation sealing ring, and the second inflation sealing ring is used for sealing the other end of the to-be-detected pipeline. The metal corrugated pipe air tightness detection device can be matched with pipelines of different sizes and is high in adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline detection, and in particular to an air tightness detection device for a metal bellows. Background Art

[0002] Metal bellows, as a flexible pressure-resistant pipe fitting, is widely used in the industrial field. As one of its key performances, air tightness has an important impact on the safety of pipeline operation. Existing air tightness detection technologies mainly include manual detection method, semi-automatic test bench detection method, etc. When testing the air tightness of the bellows, the above two methods need to customize different sealing tools according to the diameter and length of the bellows, which has poor adaptability. Summary of the invention

[0003] The purpose of the present invention is to provide a metal bellows air tightness detection device to solve the problems existing in the above-mentioned prior art, which can match pipelines of different sizes and has strong adaptability.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a metal bellows air tightness detection device, comprising: a water tank and at least one detection module, wherein the detection module can be located in the water tank, the detection module comprises a linear drive structure, a first sealing structure and a second sealing structure, the linear drive structure is used to drive the first sealing structure and / or the second sealing structure to move, so as to change the distance between the first sealing structure and the second sealing structure, the first sealing structure comprises a first inflatable sealing ring, and the first inflatable sealing ring is used to seal one end of the pipeline to be detected, and the second sealing structure comprises a second inflatable sealing ring, and the second inflatable sealing ring is used to seal the other end of the pipeline to be detected.

[0006] Preferably, the linear drive structure includes a detection module base, a first motor and a screw rod, the first motor and the second sealing structure are both arranged on the detection module base, the screw rod is transmission-connected to the power output end of the first motor, the first sealing structure is arranged on the screw rod nut, and the screw rod nut is threadedly connected to the screw rod.

[0007] Preferably, the first sealing structure also includes a movable support and a first sealing ring seat, the movable support and the first sealing ring seat are rotatably connected, the first inflatable sealing ring is located on the first sealing ring seat, a first inflation channel is provided in the first sealing ring seat, and the first inflation channel is connected to the first inflatable sealing ring.

[0008] Preferably, the detection module further comprises a rotation driving structure, the rotation driving structure comprises a second motor, and the second motor is used for driving the first sealing structure, the pipeline to be detected and the second sealing structure to rotate relative to the detection module base.

[0009] Preferably, the second sealing structure also includes a second sealing ring seat, which is rotatably connected to the detection module base, and the second inflatable sealing ring is located on the second sealing ring seat. A second inflation channel is provided in the second sealing ring seat, and the second inflation channel is used to communicate with the second inflatable sealing ring.

[0010] Preferably, a core shaft is provided on the first sealing ring seat and the second sealing ring seat, and a third inflation channel is opened on the core shaft on the first sealing ring seat and / or the second sealing ring seat, and the third inflation channel is connected to the pipeline to be detected.

[0011] Preferably, the detection module further includes a distance sensor, and the distance sensor is used to detect the distance between the first sealing structure and the second sealing structure.

[0012] Preferably, it also includes a lifting structure, which includes a lifting drive structure and a guide structure, the output end of the lifting drive structure is used to connect with the detection module, the guide structure is located in the water tank, and the guide structure is used to guide when the lifting drive structure drives the detection module to lift.

[0013] Preferably, it also includes an air supply structure, which is respectively connected to the first inflatable sealing ring, the second inflatable sealing ring and the pipeline to be detected, and an air pressure sensor is provided on the pipeline connecting the air supply structure with the first inflatable sealing ring, the second inflatable sealing ring and the pipeline to be detected.

[0014] Preferably, it also includes a visual recognition module, and the visual recognition module is used to capture the image in the water tank.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The present invention adopts a first inflatable sealing ring and a second inflatable sealing ring, so that a single tool can seal a pipeline with a medium diameter within a certain range, and can realize dynamic compensation for the wear of the sealing element. There is no need to frequently replace the sealing tool, which reduces equipment costs and tooling requirements. The distance between the first sealing structure and the second sealing structure is adjusted by a linear drive structure, so that pipelines of different lengths can be adapted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a front view of the metal bellows air tightness detection device of the present invention;

[0019] Figure 2 It is a side view of the metal bellows air tightness detection device of the present invention;

[0020] Figure 3 This is a front view of the detection module of the present invention;

[0021] Figure 4 This is an axonometric diagram of the detection module of the present invention (excluding the motor protection cover, the first protection cover and the second protection cover);

[0022] Figure 5 is a cross-sectional view of a first sealing structure of the present invention;

[0023] Figure 6 is a cross-sectional view of a second sealing structure of the present invention;

[0024] Figure 7 It is a schematic diagram of a metal bellows;

[0025] In the figure: 100-metal bellows air tightness detection device; 1, base; 2, guide shaft; 3, linear bearing; 4, floating joint; 5, lifting drive structure; 6, spring hose; 7, detection module; 8, transparent observation plate; 9, air pressure sensor; 10, air supply structure; 11, visual recognition module; 12, sink; 13, motor protection cover; 14, detection module base; 15, first protection cover; 16, second motor; 17, movable support; 18, first sealing structure; 19, gear; 20, second protection cover; 21, second sealing structure; 22, distance sensor; 23, first motor; 24, coupling; 25, first bearing seat; 26, guide rail; 27, slider; 28, screw nut; 29, screw; 30, second bearing seat; 31, bearing; 32, first sealed bearing seat; 33, first inflatable sealing ring; 34, first sealing ring seat; 35, core shaft; 36, second sealing ring seat. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide a metal bellows air tightness detection device to solve the problems existing in the above-mentioned prior art, which can match pipelines of different sizes and has strong adaptability.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 7 As shown, this embodiment provides a metal bellows air tightness detection device 100, including: a base 1, a water tank 12 and at least one detection module 7, the water tank 12 is fixed on the base 1, and the side wall of the water tank 12 is provided with a transparent observation plate 8, the detection module 7 can be located in the water tank 12, the detection module 7 includes a linear drive structure, a first sealing structure 18 and a second sealing structure 21, the linear drive structure is used to drive the first sealing structure 18 and / or the second sealing structure 21 to move, so as to change the distance between the first sealing structure 18 and the second sealing structure 21, the first sealing structure 18 includes a first inflatable sealing ring 33, the first inflatable sealing ring 33 is used to seal one end of the pipeline to be detected, and the second sealing structure 21 includes a second inflatable sealing ring, and the second inflatable sealing ring is used to seal the other end of the pipeline to be detected.

[0030] Specifically, in this embodiment, the linear drive structure includes a detection module base 14, a first motor 23 and a screw rod 29. The first motor 23 and the second sealing structure 21 are both arranged on the detection module base 14. A motor protection cover 13 is arranged on the outer side of the first motor 23. The screw rod 29 is connected to the power output end of the first motor 23 through a coupling 24. The screw rod 29 passes through the first bearing seat 25 on the first mounting plate of the detection module base 14, and the screw rod 29 is rotatably connected to the first bearing seat 25. The first sealing structure 18 is arranged on the screw nut 28, and the screw nut 28 is threadedly connected to the screw rod 29. The other end of the screw rod 29 passes through the second bearing seat 30 on the second mounting plate of the detection module base 14, and the screw rod 29 is rotatably connected to the second bearing seat 30. The second sealing structure 21 is arranged on the second mounting plate, and a distance sensor 22 is also arranged on the second mounting plate. The distance of the horizontal movement of the movable support 17 is controlled by the distance sensor 22 arranged on the second mounting plate, so as to avoid the movable support 17 not moving into place and causing the pipeline to be detected to be not fixed normally.

[0031] In this embodiment, the first sealing structure 18 also includes a movable support 17 and a first sealing ring seat 34. The movable support 17 is arranged on the screw nut 28, and the first sealing ring seat 34 is arranged on the first sealing bearing seat 32. The movable support 17 and the first sealing bearing seat 32 are rotatably connected through a bearing 31. A first protective cover 15 is arranged on the outer side of the screw part between the first mounting plate and the movable support 17, and a second protective cover 20 is arranged on the outer side of the screw part between the movable support 17 and the second mounting plate. The first protective cover 15 and the second protective cover 20 are both retractable structures. The first inflatable sealing ring 33 is located on the first sealing ring seat 34, and a first inflation channel is arranged in the first sealing ring seat 34. One end of the first inflation channel is connected to the first inflatable sealing ring 33, and the other end of the first inflation channel is connected to the air supply structure 10.

[0032] In this embodiment, a guide rail 26 is further provided on the detection module base 14 , and a slider 27 at the bottom of the movable support 17 is slidably connected to the guide rail 26 .

[0033] In this embodiment, the detection module 7 also includes a rotation drive structure, which includes a second motor 16. The second motor 16 is arranged on a movable support 17. A gear 19 is arranged at the power output end of the second motor 16. The gear 19 is transmission-connected to the first sealing ring seat 34. The second motor 16 drives the gear 19 to rotate, thereby driving the first sealing structure 18, the pipeline to be detected and the second sealing structure 21 to rotate relative to the detection module base 14.

[0034] In this embodiment, the second sealing structure 21 also includes a second sealing ring seat 36, which is arranged on a second sealing bearing seat. The second sealing bearing seat is rotatably connected to the second mounting plate through a bearing. The second inflatable sealing ring is located on the second sealing ring seat 36. A second inflation channel is arranged in the second sealing ring seat 36. One end of the second inflation channel is connected to the second inflatable sealing ring, and the other end of the second inflation channel is connected to the air supply structure 10.

[0035] In this embodiment, a core shaft 35 is provided on the first sealing ring seat 34 and the second sealing ring seat 36, and the core shaft 35 on the first sealing ring seat 34 and / or the second sealing ring seat 36 is provided with a third inflation channel, one end of the third inflation channel is connected to the pipeline to be detected, and the other end of the third inflation channel is connected to the air supply structure 10.

[0036] In this embodiment, the air supply structure 10 is located inside the base 1, and an air pressure sensor 9 is provided on the pipeline connecting the air supply structure 10 with the first air filling channel, the second air filling channel and the third air filling channel, and the pipeline connecting the air supply structure 10 with the first air filling channel, the second air filling channel and the third air filling channel is a spring hose 6.

[0037] The present embodiment also includes a lifting structure, which includes a lifting drive structure 5 and a guide structure. The lifting drive structure 5 is a cylinder, a hydraulic cylinder or an electric push rod. The fixed end of the lifting drive structure 5 is fixed on the water tank 12. The output end of the lifting drive structure 5 is connected to the detection module base 14 through a floating joint 4. The guide structure is located in the water tank 12. The guide structure is a guide shaft 2. A linear bearing 3 is arranged between the floating joint 4 and the guide shaft 2. The guide structure is used for guiding when the lifting drive structure 5 drives the detection module 7 to lift.

[0038] This embodiment also includes a visual recognition module 11, which is arranged above the water tank 12. The visual recognition module 11 is preferably a camera. The visual recognition module 11 is used to capture images in the water tank 12. The image data collected by the visual recognition module 11 can be used to transmit to the system for calculation and determination of the precise location of the leakage point and generate a detection report.

[0039] In this embodiment, a plurality of detection modules 7 can be provided according to actual needs to realize simultaneous detection of a plurality of pipelines to be detected, and the plurality of detection modules 7 can be driven by the same lifting structure.

[0040] In this embodiment, the pipeline to be tested is placed between the first sealing structure 18 and the second sealing structure 21, and the first motor 23 is controlled to drive the movable support 17 to move along the guide rail 26 through the screw rod 29 through the linkage of the distance sensor 22 and the first motor 23, so as to change the distance between the first sealing structure 18 and the second sealing structure 21, so as to achieve the matching of pipelines to be tested with different lengths; the first sealing structure 18 is provided with a first inflation channel connected to the first inflation seal ring 33, and the second sealing structure 21 is provided with a second inflation channel connected to the second inflation seal ring, and the air supply structure 10 supplies air to the first inflation seal ring 33 through the first inflation channel and to the second inflation seal ring through the second inflation channel. The first inflation seal ring 33 and the second inflation seal ring are made of rubber. After being inflated, they can automatically expand to adapt to pipelines to be tested with different inner diameters, so as to achieve the matching of pipelines to be tested. the lifting drive structure 5 works to drive the detection module 7 into the water tank 12, the air supply structure 10 adjusts the air pressure according to the setting and fills the gas into the pipeline to be detected through the third inflation channel provided on the first sealing structure 18, thereby simulating the airtightness state under different working environments and monitoring the air pressure changes inside the pipeline to be detected in real time; after the pipeline to be detected enters the water tank 12, the second motor 16 drives the pipeline to be detected to rotate, thereby realizing the detection of the pipeline to be detected without dead angles; when the pipeline to be detected is immersed in water and inflated, bubbles will be generated at any leakage point; the visual recognition module 11 can detect whether bubbles are generated in the water tank 12, and automatically determine the precise position of the leakage point through the algorithm, so as to mark the leakage position; after the detection is completed, the system automatically generates a detection report to record all data during the airtightness detection process, including the leakage point position, pressure curve diagram, etc.

[0041] This embodiment adopts the first inflatable sealing ring 33 and the second inflatable sealing ring, so that a single tool can seal the pipeline with a diameter within a certain range, and can realize dynamic compensation for the wear of the sealing element. There is no need to frequently replace the sealing tool, which reduces the equipment cost and the tooling requirements. The distance between the first sealing structure 18 and the second sealing structure 21 is adjusted by the linear drive structure, so that pipelines of different lengths can be adapted. Through the water immersion detection combined with the visual recognition module 11, the leakage point can be captured and marked in real time to provide more accurate detection results. The gas pressure filled into the pipeline to be detected is adjusted by the air supply structure 10 to adapt to the air tightness detection requirements under different working pressures and cover more application scenarios. The key parameters are monitored in real time by the air pressure sensor 9 and the distance sensor 22 to avoid damage to the pipeline to be detected or detection failure due to excessive pressure or incorrect position of the movable support 17, thereby improving the safety and reliability of the detection. This embodiment can also be matched with a control system to achieve fully automated operation, replacing traditional manual operation, significantly improving the efficiency of pipeline air tightness detection, and reducing human intervention and operating errors.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A metal bellows air tightness detection device, characterized in that: include: A water tank and at least one detection module, the detection module can be located in the water tank, the detection module includes a linear drive structure, a first sealing structure and a second sealing structure, the linear drive structure is used to drive the first sealing structure and / or the second sealing structure to move, so as to change the distance between the first sealing structure and the second sealing structure, the first sealing structure includes a first inflatable sealing ring, the first inflatable sealing ring is used to seal one end of the pipeline to be detected, and the second sealing structure includes a second inflatable sealing ring, the second inflatable sealing ring is used to seal the other end of the pipeline to be detected.

2. The metal bellows air tightness detection device according to claim 1, characterized in that: The linear drive structure includes a detection module base, a first motor and a screw rod. The first motor and the second sealing structure are both arranged on the detection module base. The screw rod is transmission-connected to the power output end of the first motor. The first sealing structure is arranged on a screw rod nut, and the screw rod nut is threadedly connected to the screw rod.

3. The metal bellows air tightness detection device according to claim 2, characterized in that: The first sealing structure also includes a movable support and a first sealing ring seat, the movable support and the first sealing ring seat are rotatably connected, the first inflatable sealing ring is located on the first sealing ring seat, a first inflatable channel is provided in the first sealing ring seat, and the first inflatable channel is connected to the first inflatable sealing ring.

4. The metal bellows air tightness detection device according to claim 2, characterized in that: The detection module further includes a rotation driving structure, which includes a second motor, and the second motor is used to drive the first sealing structure, the pipeline to be detected, and the second sealing structure to rotate relative to the detection module base.

5. The metal bellows air tightness detection device according to claim 3, characterized in that: The second sealing structure also includes a second sealing ring seat, which is rotatably connected to the detection module base. The second inflatable sealing ring is located on the second sealing ring seat. A second inflation channel is provided in the second sealing ring seat. The second inflation channel is used to communicate with the second inflatable sealing ring.

6. The metal bellows air tightness detection device according to claim 5, characterized in that: The first sealing ring seat and the second sealing ring seat are provided with a core shaft, and the core shaft on the first sealing ring seat and / or the second sealing ring seat is provided with a third inflation channel, and the third inflation channel is communicated with the pipeline to be detected.

7. The metal bellows air tightness detection device according to claim 1, characterized in that: The detection module further includes a distance sensor, and the distance sensor is used to detect the distance between the first sealing structure and the second sealing structure.

8. The metal bellows air tightness detection device according to claim 1, characterized in that: It also includes a lifting structure, which includes a lifting drive structure and a guide structure. The output end of the lifting drive structure is used to connect with the detection module. The guide structure is located in the water tank and is used to guide when the lifting drive structure drives the detection module to lift.

9. The metal bellows air tightness detection device according to claim 1, characterized in that: It also includes an air supply structure, which is respectively connected to the first inflatable sealing ring, the second inflatable sealing ring and the pipeline to be detected, and an air pressure sensor is arranged on the pipeline connecting the air supply structure with the first inflatable sealing ring, the second inflatable sealing ring and the pipeline to be detected.

10. The metal bellows air tightness detection device according to claim 1, characterized in that: It also includes a visual recognition module, which is used to capture images in the water tank.

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