Leakage detection device and detection method

Abstract

A leakage detection device disclosed by the present invention comprises a detection assembly and a bearing assembly, the detection assembly comprises a cylinder, the surface of the cylinder is provided with a first annular groove and a second annular groove, the first annular groove is provided with a first air bag covering the first annular groove, and the second annular groove is provided with a second air bag covering the second annular groove. The bearing assembly comprises two supporting rings connected with the two ends of the cylinder body, mounting cavities are formed in the supporting rings, annular openings are formed in the inner walls of the supporting rings, clamping assemblies are mounted in the mounting cavities, and the clamping assemblies are arranged in the clamping assemblies. The clamping assembly extends out of the mounting cavity from the annular opening part to clamp the barrel, and the supporting ring is provided with a walking wheel. The clamping device is used for fixing the cylinder, so that the supporting ring can bear cylinders with different diameters, the device can bear air bags with different diameters, and pipelines with different diameters can be detected.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage detection, and more specifically, to a leakage detection device and a detection method. Background Art

[0002] The detection of pipeline leakage mostly relies on observation by staff during inspections, which is relatively inefficient. In addition, since pipelines are often buried underground in a complex environment, it is impossible to accurately determine whether the pipeline is intact by the human eye.

[0003] The Chinese invention patent with application number 2020100024995 discloses a pipeline leakage locating device, which belongs to the field of mechanical and electronic technology. The device includes a detection head for finding the location of pipeline leakage, a hose for guiding the movement of the detection head and a plug for sealing the pipeline port. The detection head can enter the interior of the pipeline under the guidance of the hose. An expansion ring and a camera are provided on the detection head. The expansion ring can flexibly seal pipelines at different positions when inflated. The camera can be used to guide the detection head forward and assist in finding the leakage location.

[0004] Although the leakage locating device can help manual detection of pipeline leakage, there are many pipelines with different diameters, and a single airbag cannot adapt to pipelines with different diameters. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a leakage detection device that can adapt to pipelines with different diameters.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a leakage detection device, including a detection component and a bearing component, the detection component includes a cylinder, the surface of the cylinder is provided with a first annular groove and a second annular groove, the first annular groove is installed with a first air bag covering the first annular groove, the second annular groove is installed with a second air bag covering the second annular groove, the surface of the cylinder is provided with a first air outlet placed between the first annular groove and the second annular groove, the bearing component includes two support rings connecting the two ends of the cylinder, the support ring is provided with an installation cavity and an annular opening is formed on the inner wall of the support ring, a clamping component is installed in the installation cavity, the clamping component extends out of the installation cavity from the annular opening part to clamp the cylinder, and the support ring is installed with a walking wheel.

[0007] Furthermore, a first conveying channel, a second conveying channel and a third conveying channel are provided in the cylinder, a second air outlet is provided on the surface of the first annular groove, a third air outlet is provided on the surface of the second annular groove, the second conveying channel is connected to the second air outlet and the third air outlet at the same time, the third conveying channel is connected to the first air outlet and the second air outlet at the same time, and the first conveying channel is connected to the first air outlet.

[0008] Furthermore, at least one end of the cylinder is provided with interfaces respectively connected to the first delivery channel, the second delivery channel and the third delivery channel, the interface is connected to a gas pipeline, the gas pipeline is connected to an external gas source, the gas pipeline connected to the first delivery channel is installed with a first pressure gauge, the gas pipeline connected to the second delivery channel is installed with a second pressure gauge, and the gas pipeline connected to the third delivery channel is connected with a third pressure gauge.

[0009] Furthermore, the support ring includes a ring body, the ring body is connected to a cover body, the installation cavity is formed between the cover body and the ring body, the clamping assembly includes a plurality of limit plates, the side of the ring body facing the cover body is provided with a plurality of guide grooves extending along the tangential direction of the inner ring of the ring body, the limit plate is provided with a guide column embedded in the guide groove so that the limit plate can move along the guide groove, and the end of the limit plate extends from the annular opening into the inner ring of the ring body and abuts against the cylinder.

[0010] Furthermore, the end of the limiting plate is a triangular structure so that the limiting plate forms a circular opening in the inner ring of the ring body, and the limiting plate moves to change the diameter of the circular opening.

[0011] Furthermore, a driving disk is provided in the installation cavity and placed between the cover body and the limit plate. The driving disk is provided with a plurality of strip holes. The limit plate is provided with a driving column embedded in the strip holes. The limit plate rotates to drive the limit plate to move. An adjustment hole is provided on the end surface of the cover body. The driving disk is provided with an adjustment rod extending through the adjustment hole to the outside of the installation cavity. The adjustment hole is arc-shaped. The adjustment rod moves along the adjustment hole to drive the driving disk to rotate.

[0012] Furthermore, an arc-shaped limit groove is provided on one side of the cover body facing the driving judgment disk, and the driving disk is provided with a limit column embedded in the limit groove, and a spring is provided in the limit groove, which pushes the limit column to move toward one end of the limit groove to drive the limit disk to rotate and drive the limit plate to move to the position where the diameter of the circular opening is the smallest.

[0013] Furthermore, the support ring is equipped with a rotatable support rod, the walking wheel is placed at the end of the support rod, a tension spring is arranged between the support rod and the support ring to limit the support rod from rotating toward one side of the support ring, and the support rod is equipped with a motor for driving the walking wheel to rotate.

[0014] The present invention also provides a leakage detection method, comprising the following steps:

[0015] S1: Select a suitable cylinder according to the pipe diameter and fix the support rings at both ends of the cylinder;

[0016] S2: Use the delivery pipe to connect the gas source to the interface of the cylinder and test whether it is ventilated normally;

[0017] S3: Place the device into the pipeline to be tested and control the device to move to the point to be tested;

[0018] S4: supplying air into the second delivery channel and the third delivery channel to expand the first airbag and the second airbag, and stopping supplying air after the values ​​of the first air pressure gauge and the second air pressure gauge are stable;

[0019] S5: supplying air into the first delivery channel, and stopping supplying air after the value of the first air pressure gauge stabilizes;

[0020] S6: Observe the decreasing range of the value of the first pressure gauge. If the decreasing range is too large, it indicates leakage.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. By fixing the cylinder with the clamping device, the support ring can carry cylinders of different diameters, and the device can carry airbags of different diameters, so that pipelines of different diameters can be inspected.

[0023] 2. A separate test space can be created in the pipeline through the first airbag and the second airbag. There is no need to inflate the entire pipeline for testing. The test is relatively fast and has strong targeting for suspected leaks.

[0024] 3. The two support rings not only support the cylinder but also back up each other, which can ensure the stability of the walking function of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0028] Figure 4 is a schematic diagram of the structure of the clamping assembly;

[0029] Figure 5 It is a schematic diagram showing the structure of the cover;

[0030] Figure markings: cylinder 100, first air bag 110, second air bag 120, first annular groove 130, second air outlet 131, second annular groove 140, third air outlet 141, first conveying channel 150, first air outlet 151, second conveying channel 160, third conveying channel 170, support ring 200, cover body 210, adjustment hole 211, limiting groove 212, spring 213, ring body 220, accommodating cavity 221, guide groove 222, installation cavity 230, limiting plate 240, guide column 241, driving column 242, driving disk 250, strip hole 251, adjustment rod 252, limiting column 253, walking wheel 300, motor 301, support rod 310, tension spring 320. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figures 1 to 5The present embodiment discloses a leakage detection device, including a detection component and a bearing component, the detection component includes a cylinder 100, the surface of the cylinder 100 is provided with a first annular groove 130 and a second annular groove 140, the first annular groove 130 is installed with a first air bag 110 covering the first annular groove 130, the second annular groove 140 is installed with a second air bag 120 covering the second annular groove 140, the surface of the cylinder 100 is provided with a first air outlet 151 disposed between the first annular groove 130 and the second annular groove 140, the bearing component includes two support rings 200 connecting the two ends of the cylinder 100, the support ring 200 is provided with an installation cavity 230 and an annular opening is formed on the inner wall of the support ring 200, a clamping component is installed in the installation cavity 230, the clamping component extends from the annular opening portion of the installation cavity 230 to clamp the cylinder 100, and the support ring 200 is installed with a walking wheel 300. The cylinder 100 is provided with a first delivery channel 150, a second delivery channel 160 and a third delivery channel 170, the surface of the first annular groove 130 is provided with a second air outlet 131, the surface of the second annular groove 140 is provided with a third air outlet 141, the second delivery channel 160 is connected to the second air outlet 131 and the third air outlet 141 at the same time, the third delivery channel 170 is connected to the first air outlet 151 and the second air outlet 131 at the same time, and the first delivery channel 150 is connected to the first air outlet 151. At least one end of the cylinder 100 is provided with an interface respectively connected to the first delivery channel 150, the second delivery channel 160 and the third delivery channel 170, the interface is connected to a gas pipeline, the gas pipeline is connected to an external gas source, the gas pipeline connected to the first delivery channel 150 is installed with a first barometer, the gas pipeline connected to the second delivery channel 160 is equipped with a second barometer, and the gas pipeline connected to the third delivery channel 170 is connected with a third barometer. The support ring 200 is provided with a rotatable support rod 310, and the walking wheel 300 is placed at the end of the support rod 310. A tension spring 320 is provided between the support rod 310 and the support ring 200 to limit the support rod 310 from rotating toward one side of the principle support ring 200, and the support rod 310 is provided with a motor 301 for driving the walking wheel 300 to rotate. A receiving cavity 221 is provided in the support ring 200, and a battery for powering the motor 301 and a circuit board for control are installed in the receiving cavity 221, so that the device can be remotely controlled and moved. At the same time, a camera is also installed on the support ring 200 to facilitate the user's observation. The two support rings 200 not only play the role of supporting the cylinder 100, but also serve as backup for each other. The two can work independently of each other, and when one party cannot work, the other party can also drive the cylinder 100 to move.

[0033] When in use, first connect the air source to the interface of the cylinder 100 through the delivery pipeline and test whether it is ventilated normally. After the test is completed, put the device into the pipeline to be tested, rotate the support rod 310, and make the walking wheel 300 contact and fit with the inner wall of the pipeline under the action of the tension spring 320. Then operate the device to move the device to the point to be tested, first send air to the second delivery channel 160 and the third delivery channel 170 to expand the first airbag 110 and the second airbag 120, stop sending air after the values ​​of the first and second pressure gauges are stable, and then send air to the first delivery channel 150, stop sending air after the value of the first pressure gauge is stable, and observe the decrease in the value of the first pressure gauge. If the decrease is too large, it means there is leakage.

[0034] The support ring 200 includes a ring body 220, the ring body 220 is connected to the cover body 210, and a mounting cavity 230 is formed between the cover body 210 and the ring body 220. The clamping assembly includes a plurality of limit plates 240. A plurality of guide grooves 222 extending along the tangent direction of the inner ring of the ring body 220 are provided on one side of the ring body 220 facing the cover body 210. The limit plates 240 are provided with guide posts 241 embedded in the guide grooves 222 so that the limit plates 240 can move along the guide grooves 222. The ends of the limit plates 240 extend from the annular opening to the inner ring of the ring body 220 and abut against the cylinder 100. The ends of the limit plates 240 are triangular structures so that the limit plates 240 form a circular opening in the inner ring of the ring body 220, and the limit plates 240 move to change the diameter of the circular opening. Different diameters of the airbags are required for pipes with different diameters. By changing the diameter of the annular opening, the cylinder 100 with different diameters can be clamped, so that the device can adapt to pipes with different diameters.

[0035] A driving disk 250 is provided in the installation cavity 230 and is placed between the cover body 210 and the limiting plate 240. The driving disk 250 is provided with a plurality of strip holes 251. The limiting plate 240 is provided with a driving column 242 embedded in the strip hole 251. The limiting plate 240 rotates to drive the limiting plate 240 to move. An adjusting hole 211 is provided on the end surface of the cover body 210. The driving disk 250 is provided with an adjusting rod 252 extending through the adjusting hole 211 to the outside of the installation cavity 230. The adjusting hole 211 is arc-shaped. The adjusting rod 252 moves along the adjusting hole 211 to drive the driving disk 250 to rotate. The cover 210 is provided with an arc-shaped limiting groove 212 on one side facing the driving disc, and the driving disc 250 is provided with a limiting column 253 embedded in the limiting groove 212. A spring 213 is provided in the limiting groove 212 to push the limiting column 253 to move toward one end of the limiting groove 212 to drive the limiting disc to rotate and drive the limiting plate 240 to move to the position when the diameter of the circular opening is the smallest. The diameter of the circular opening can be easily adjusted by adjusting the rod 252, so as to facilitate the replacement of the cylinder 100. The spring 213 can maintain the rotation trend of the driving disc 250, so that the circular opening can maintain the clamping of the cylinder 100, thereby preventing the cylinder 100 from detaching from the support ring 200.

[0036] This embodiment also provides a leakage detection method, comprising the following steps:

[0037] S1: Select a suitable cylinder 100 according to the pipe diameter and fix the support ring 200 to both ends of the cylinder 100;

[0038] S2: Use a delivery pipeline to connect the gas source to the interface of the cylinder 100 and test whether the ventilation is normal;

[0039] S3: Place the device into the pipeline to be tested and control the device to move to the point to be tested;

[0040] S4: supplying air into the second delivery channel 160 and the third delivery channel 170 to expand the first airbag 110 and the second airbag 120, and stopping supplying air after the values ​​of the first air pressure gauge and the second air pressure gauge are stable;

[0041] S5: supplying air into the first delivery channel 150, and stopping supplying air after the value of the first air pressure gauge stabilizes;

[0042] S6: Observe the decreasing range of the value of the first pressure gauge. If the decreasing range is too large, it indicates leakage.

[0043] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A leakage detection device, characterized in that: The invention comprises a detection component and a bearing component, wherein the detection component comprises a cylinder (100), the surface of the cylinder (100) is provided with a first annular groove (130) and a second annular groove (140), the first annular groove (130) is provided with a first airbag (110) covering the first annular groove (130), the second annular groove (140) is provided with a second airbag (120) covering the second annular groove (140), and the surface of the cylinder (100) is provided with a first annular groove (130) and a second annular groove (140). (140), the bearing assembly comprises two support rings (200) connected at both ends of the cylinder (100), a mounting cavity (230) is arranged in the support ring (200) and an annular opening is formed on the inner wall of the support ring (200), a clamping assembly is installed in the mounting cavity (230), the clamping assembly extends out of the mounting cavity (230) from the annular opening portion to clamp the cylinder (100), and the support ring (200) is installed with a walking wheel (300).

2. A leakage detection device according to claim 1, characterized in that: The cylinder (100) is provided with a first conveying channel (150), a second conveying channel (160) and a third conveying channel (170); the surface of the first annular groove (130) is provided with a second air outlet (131); the surface of the second annular groove (140) is provided with a third air outlet (141); the second conveying channel (160) is connected to the second air outlet (131) and the third air outlet (141); the third conveying channel (170) is connected to the first air outlet (151) and the second air outlet (131); the first conveying channel (150) is connected to the first air outlet (151).

3. A leakage detection device according to claim 2, characterized in that: At least one end of the cylinder (100) is provided with interfaces respectively connected to the first delivery channel (150), the second delivery channel (160) and the third delivery channel (170); the interfaces are connected to a gas pipeline, and the gas pipeline is connected to an external gas source; the gas pipeline connected to the first delivery channel (150) is installed with a first air pressure gauge, the gas pipeline connected to the second delivery channel (160) is installed with a second air pressure gauge, and the gas pipeline connected to the third delivery channel (170) is connected with a third air pressure gauge.

4. A leakage detection device according to claim 1, characterized in that: The support ring (200) comprises a ring body (220), the ring body (220) is connected to a cover body (210), the mounting cavity (230) is formed between the cover body (210) and the ring body (220), the clamping assembly comprises a plurality of limit plates (240), a side of the ring body (220) facing the cover body (210) is provided with a plurality of guide grooves (222) extending along the tangent direction of the inner ring of the ring body (220), the limit plate (240) is provided with a guide column (241) embedded in the guide groove (222) so that the limit plate (240) can move along the guide groove (222), and the end of the limit plate (240) extends from the annular opening into the inner ring of the ring body (220) and abuts against the cylinder (100).

5. A leakage detection device according to claim 4, characterized in that: The end of the limiting plate (240) is a triangular structure so that the limiting plate (240) forms a circular opening in the inner ring of the ring body (220), and the limiting plate (240) moves to change the diameter of the circular opening.

6. A leakage detection device according to claim 4, characterized in that: A driving disk (250) is arranged in the installation cavity (230) and is placed between the cover body (210) and the limiting plate (240); a plurality of strip holes (251) are arranged on the hand of the driving disk (250); the limiting plate (240) is provided with a driving column (242) embedded in the strip holes (251); the limiting plate (240) rotates to drive the limiting plate (240) to move; an adjustment hole (211) is arranged on the end surface of the cover body (210); the driving disk (250) is provided with an adjustment rod (252) extending through the adjustment hole (211) to the outside of the installation cavity (230); the adjustment hole (211) is arc-shaped; the adjustment rod (252) moves along the adjustment hole (211) to drive the driving disk (250) to rotate.

7. A leakage detection device according to claim 6, characterized in that: The cover body (210) is provided with an arc-shaped limiting groove (212) on one side facing the driving disc, and the driving disc (250) is provided with a limiting column (253) embedded in the limiting groove (212). A spring (213) is provided in the limiting groove (212), and the spring (213) pushes the limiting column (253) to move toward one end of the limiting groove (212) to drive the limiting disc to rotate and drive the limiting plate (240) to move to the position where the diameter of the circular opening is the smallest.

8. A leakage detection device according to claim 1, characterized in that: The support ring (200) is provided with a rotatable support rod (310), the travel wheel (300) is placed at the end of the support rod (310), a tension spring (320) is provided between the support rod (310) and the support ring (200) to limit the support rod (310) from rotating toward one side of the support ring (200), and the support rod (310) is provided with a motor (301) for driving the travel wheel (300) to rotate.

9. A method for leak detection using the leak detection device according to claim 3, characterized in that: The following steps are involved: S1: Select a suitable cylinder (100) according to the pipe diameter and fix the support rings (200) to both ends of the cylinder (100); S2: Use a delivery pipeline to connect the gas source to the interface of the cylinder (100) and test whether the gas is ventilated normally; S3: Place the device into the pipeline to be tested and control the device to move to the point to be tested; S4: supplying air into the second delivery channel (160) and the third delivery channel (170) to expand the first airbag (110) and the second airbag (120), and stopping supplying air after the values ​​of the first air pressure gauge and the second air pressure gauge become stable; S5: supplying air into the first delivery channel (150), and stopping the supply of air after the value of the first air pressure gauge stabilizes; S6: Observe the decreasing range of the value of the first pressure gauge. If the decreasing range is too large, it indicates leakage.

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