Pipeline leak detection device

Abstract

The present invention relates to the field of pipeline leak detection and discloses a pipeline leak detection device comprising two structural components that are detachably connected and form a circular passageway. The structural components include: a housing having a semicircular surface; a first sealing component and a second sealing component that are spaced apart on the semicircular surface along the axial direction of the passageway and extend along the arc length of the semicircular surface and are flush with both ends of the semicircular surface in the arc length direction; a cavity is defined between the first sealing component, the second sealing component, the semicircular surface, and the pipeline to be tested; a plurality of leak detection mechanisms that are disposed within the housing and spaced apart along the arc length direction of the semicircular surface; the leak detection mechanisms include a housing, an air injection unit, an air extraction unit, and a leak detector disposed within the housing; the air injection unit and the air extraction unit are selectively connected to the cavity; the leak detector is used to detect gas extracted by the air extraction unit; and a moving mechanism disposed on the housing for driving the structural components to move along the pipeline to be tested. The present invention can improve efficiency and detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline leakage detection, in particular to a pipeline leakage detection device. Background Art

[0002] Pipeline leak detection is a key measure for ensuring the safe operation of high-risk gas transmission systems in industries such as chemical and nuclear power. Its detection performance directly impacts production safety. Conventional pipeline inspection methods suffer from low efficiency and accuracy when inspecting high-pressure, toxic, or radioactive gas pipelines. This is particularly true for radioactive gas pipelines, where conventional pipeline inspection methods struggle to provide effective early warning and prevent potential safety hazards. Therefore, further improving the efficiency and accuracy of pipeline leak detection has become a pressing issue. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a pipeline leak detection device that can effectively improve the detection efficiency and accuracy of pipeline leakage detection.

[0004] According to an embodiment of the present invention, a pipeline leak detection device includes two structural members, which are detachably connected to form a circular passage, and the passage is used to accommodate the pipeline to be tested. The structural member includes: a shell, which is provided with a semicircular surface forming part of the passage; a first seal and a second seal, which are arranged on the semicircular surface at intervals along the axial direction of the passage, extend along the arc length direction of the semicircular surface, and are flush with the two ends of the semicircular surface in the arc length direction, and a cavity is jointly defined between the first seal, the second seal, the semicircular surface and the pipeline to be tested; a plurality of leak detection mechanisms are arranged in the shell and spaced along the arc length direction of the semicircular surface, the leak detection mechanism includes a box body, and an injection part, an exhaust part and a leak detector arranged in the box body, the injection part and the exhaust part can selectively be connected to the cavity, and the leak detector is used to detect the gas extracted by the exhaust part; a moving mechanism is provided on the shell body, and is used to drive the structural member to move on the pipeline to be tested.

[0005] According to an embodiment of the present invention, the pipeline leak detection device adopting the above-mentioned structure can move on the pipeline to be tested and perform leak detection at each position it passes through, which is conducive to improving efficiency. In addition, multiple leak detection mechanisms can select either of the two detection methods or combine the two detection methods as needed. This combination of multiple detection methods at multiple locations is conducive to improving the accuracy of detection.

[0006] In some embodiments of the present invention, the shell includes a shell body and a cover plate, the shell body is located at least at one end of the axial direction of the aisle and has an opening, the shell body is provided with the semicircular surface, the cover plates are equal to the number of the openings and correspond one to one, the cover plates are detachably covered on the openings, and multiple leak detection mechanisms are detachably provided in the shell body.

[0007] In some embodiments of the present invention, the shell wall where the semicircular surface is located is provided with a mounting hole, and the leak detection mechanism includes a first pipe and a three-way valve, the first pipe is passed through the mounting hole, one interface of the three-way valve is connected to the first pipe, and the other two interfaces are respectively connected to the jet part and the exhaust part.

[0008] In some embodiments of the present invention, the jet portion is a jet pipe, and the structural component includes a gas delivery pipe. The gas delivery pipe is arranged in the shell, and one end is connected to the jet pipe, and the other end is passed through the shell and is used to pass gas.

[0009] In some embodiments of the present invention, the leak detection mechanism includes a feedback component, which is electrically or communicatively connected to the leak detector and is configured to issue an alarm message or transmit feedback information externally when the leak detector detects a gas leak.

[0010] In some embodiments of the present invention, the moving mechanism includes a plurality of moving units, which are arranged at intervals along the arc length direction of the semicircular surface. The moving unit includes a moving part and a clamping part. The clamping part is provided on the shell and connected to the moving part, and can drive the moving part to clamp on the pipe to be tested.

[0011] In some embodiments of the present invention, the moving member of at least one of the plurality of moving units is configured as a driving component; the moving member includes a running wheel, and at least a portion of the running wheel in contact with the pipeline to be measured is made of elastic material.

[0012] In some embodiments of the present invention, the moving mechanism is provided at both ends of the housing in the axial direction of the passage.

[0013] In some embodiments of the present invention, the shell is provided with docking ends located at both radial ends of the semicircular surface, and one of the two corresponding docking ends of the two structural members is provided with a convex portion, and the other is provided with a concave portion, and the concave portion and the convex portion are nested and matched.

[0014] In some embodiments of the present invention, the shell wall of the shell extends outward to form the convex portion and is recessed inward to form the concave portion, the side wall of the concave portion is provided with a plurality of first through holes, the side wall of the convex portion is provided with a plurality of second through holes, and a plurality of fasteners are provided between the convex portion and the concave portion, and each of the fasteners is installed in the first through hole and the second through hole.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of a pipeline leak detection device provided by some embodiments of the present invention;

[0018] Figure 2 is an exploded view of a pipeline leak detection device provided by some embodiments of the present invention;

[0019] Figure 3 is a cross-sectional view of the cooperation between a pipeline leak detection device and a pipeline to be tested provided by some embodiments of the present invention;

[0020] Figure 4 is a front view of a pipeline leak detection device provided by some embodiments of the present invention;

[0021] Figure 5 is a schematic diagram of the three-dimensional structure of a leak detection mechanism provided by some embodiments of the present invention;

[0022] Figure 6 is a schematic structural diagram of a leak detection mechanism provided by some embodiments of the present invention with the box removed;

[0023] Figure 7 yes Figure 3 A local enlarged schematic diagram of location I;

[0024] Figure 8 is a side cross-sectional view of a pipeline leak detection device provided by some embodiments of the present invention;

[0025] Figure 9 for Figure 2 A local enlarged schematic diagram of location II;

[0026] Figure 10 for Figure 2 A local enlarged schematic diagram of point III.

[0027] Reference numerals:

[0028] 100. Pipeline leak detection device;

[0029] 10. Structural parts; 10a. Aisle;

[0030] 11. Housing; 11a. Semicircular surface; 11b. Mounting hole;

[0031] 111, housing body; 111a, opening; 111b, snap-fitting groove; 112, cover plate; 1101, docking end; 1102, convex portion; 1102a, second through hole; 1103, concave portion; 1103a, first through hole;

[0032] 12. First sealing member; 13. Second sealing member;

[0033] 14. Leak detection mechanism; 141. Box; 142. Jet unit; 143. Air extraction unit; 1431. Air extraction pump; 1432. Second pipeline; 1433. Third pipeline; 144. Leak detector; 145. First pipeline; 146. Three-way valve;

[0034] 15. Moving unit; 151. Moving member; 152. Clamping member; 1521. Swing arm; 1522. Driving unit;

[0035] 16. Gas delivery pipeline; 161. First connector; 162. Second connector;

[0036] 17. Hose;

[0037] 20. Cavity;

[0038] 200. Pipeline to be tested. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the features, without distinction of order or importance. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] Reference below Figures 1-10 , describing a pipeline leak detection device 100 according to an embodiment of the present invention.

[0043] like Figures 1 to 6 As shown, a pipeline leak detection device 100 according to an embodiment of the present invention includes two structural members 10 . The two structural members 10 are detachably connected and form a circular passage 10 a . The passage 10 a is used to accommodate a pipeline 200 to be tested.

[0044] The structural component 10 includes a housing 11, a first seal 12, a second seal 13, a leak detection mechanism 14, and a moving mechanism. The housing 11 has a semicircular surface 11a that forms part of the passageway 10a. The first and second seals 12, 13 are spaced apart on the semicircular surface 11a along the axial direction of the passageway 10a. They extend along the arc length of the semicircular surface 11a and are flush with both ends of the semicircular surface 11a in this arc length direction. A cavity 20 is defined between the first seal 12, the second seal 13, the semicircular surface 11a, and the pipeline 200 to be tested. Multiple leak detection mechanisms 14 are disposed within the housing 11 and spaced apart along the arc length of the semicircular surface 11a. The leak detection mechanisms 14 include a housing 141, an air injection unit 142, an air extraction unit 143, and a leak detector 144 disposed within the housing 141. The air injection unit 142 and the air extraction unit 143 are selectively connected to the cavity 20, and the leak detector 144 is used to detect the gas extracted by the air extraction unit 143. A moving mechanism is disposed on the housing 11 and is used to drive the structural member 10 to move along the pipeline 200 to be tested.

[0045] In the above technical solution, the first seal 12 and the second seal 13 may refer to structures or components that can play a sealing role, and may be, but not limited to, sealing rings. According to the shape structure of the semicircular surface 11a, the first seal 12 and the second seal 13 may be long strips with the same radius and arc length as the semicircular surface 11a. As an example, the "axial direction of the passage 10a" can refer to Figure 1 and Figure 2 The front and back direction.

[0046] Optionally, the first seal 12 and the second seal 13 can be disposed at both ends of the semicircular surface 11a in the axial direction of the passage 10a, or can be located at a distance from both ends of the axial direction, without specific limitation herein. Optionally, the surfaces of the first seal 12 and the second seal 13 facing away from the semicircular surface 11a are configured to have a certain degree of smoothness. This helps ensure that the first seal 12 and the second seal 13 can move on the pipeline 200 under the drive of the moving mechanism while maintaining a certain sealing performance, thereby reducing wear on the pipeline 200 and ensuring the integrity of the pipeline 200.

[0047] The jet portion 142 may refer to a structure or component capable of outwardly ejecting air. Similarly, the exhaust portion 143 may refer to a structure or component capable of extracting gas from the cavity 20. The leak detector 144 may refer to an instrument for detecting gas or liquid leaks. The structure and operation of the leak detector 144 in the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here. The moving mechanism may refer to a device capable of driving the entire structural member 10 to move on the pipeline 200 to be tested, and may be, but is not limited to, a robotic arm, a robotic leg, a rotor, a wheel mechanism, and the like.

[0048] When leak detection is required on the pipeline 200, the two structural members 10 can be butt-jointed on either side of the pipeline 200 and then sleeved onto the pipeline 200. Because the first and second sealing members 12, 13 are provided on the semicircular surface 11a, a sealed cavity (i.e., two cavities 20) is formed between the semicircular surface 11a, the first and second sealing members 12, 13 of the two structural members 10, and the pipeline 200. Multiple leak detection mechanisms 14 allow sampling and testing at multiple locations within the sealed cavity, thereby improving detection accuracy.

[0049] In the above technical solution, the leak detection mechanism 14 can implement two leak detection methods.

[0050] The first leak detection method: The air jet unit 142 can inject gas into the sealed cavity, and the pipeline 200 to be tested can be evacuated. A gas detection instrument inside the pipeline 200 can then detect whether the gas in the sealed cavity has entered the pipeline 200 to be tested, thereby achieving leak detection of the pipeline 200 to be tested. The gas ejected by the air jet unit 142 can be, but is not limited to, helium, nitrogen, sulfur hexafluoride, etc. Optionally, the gas ejected by the air jet unit 142 is nitrogen.

[0051] Second leak detection method: The air extraction unit 143 extracts air from the sealed cavity and introduces gas into the pipeline 200 to be tested. The leak detector 144 then detects whether the air extracted by the air extraction unit 143 contains the gas introduced into the pipeline 200 to be tested. If so, it indicates that a leak exists at the current location of the pipeline 200 to be tested. If not, it indicates that no leak exists at the current location of the pipeline 200 to be tested. The gas introduced into the pipeline 200 to be tested may be, but is not limited to, helium, nitrogen, sulfur hexafluoride, etc. Optionally, the gas introduced into the pipeline 200 to be tested is nitrogen.

[0052] It can be understood that by having two leak detection methods through the leak detection mechanism 14, the scope of application of the pipeline leak detection device 100 can be expanded to adapt to different detection needs and be used more flexibly in different usage scenarios, especially for leak detection of vacuum pipelines, the pipeline leak detection device 100 can be better applied.

[0053] Since the housing 11 is provided with a moving mechanism, the moving mechanism can move the pipeline leak detection device 100 along the pipeline to be tested 200. That is, the pipeline leak detection device 100 can cruise and detect along the length direction of the pipeline to be tested 200. The pipeline to be tested 200 can be divided into multiple pipe sections, and the width of each pipe section is equal to the width of the closed cavity. The pipeline leak detection device 100 detects one pipe section at a time, thereby realizing the detection of the entire pipeline to be tested 200 during the moving process.

[0054] According to the pipeline leak detection device 100 of the embodiment of the present invention, the pipeline leak detection device 100 adopting the above-mentioned structure can move on the pipeline 200 to be tested and perform leak detection at each position it passes through, which is conducive to improving efficiency. In addition, the multiple leak detection mechanisms 14 can select any one of the two leak detection methods as needed, or combine the two detection methods. This combination of multiple detection methods at multiple locations is conducive to improving the accuracy of detection.

[0055] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the shell 11 includes a shell body 111 and a cover plate 112. The shell body 111 is located at at least one end of the axial direction of the aisle 10a and has an opening 111a formed thereon. The shell body 111 is provided with a semicircular surface 11a. The cover plate 112 has an equal number of openings 111a and corresponds one to one. The cover plate 112 is detachably covered on the openings 111a, and a plurality of leak detection mechanisms 14 are detachably provided in the shell body 111.

[0056] Optionally, the cover plate 112 and the shell body 111 can be detachably connected by, but not limited to, bolt connection, snap connection, adhesive connection, or magnetic connection. Optionally, the leak detection mechanism 14 and the shell body 111 can be connected by, but not limited to, bolt connection, snap connection, adhesive connection, or magnetic connection.

[0057] In the above technical solution, the housing 11 is a detachable structure, with the cover 112 detachable from the housing body 111. This allows the housing 11 to be opened, facilitating the installation or removal of the leak detection mechanism 14. Multiple leak detection mechanisms 14 are detachably mounted on the housing body 111, facilitating maintenance or replacement of the leak detection mechanisms 14. Furthermore, the detachable structure of the housing 11 facilitates the concealment of all other components of the structural member 10 (such as the leak detection mechanisms 14) within the housing 11, reducing damage to other components caused by collisions, ensuring the reliability of these components, and ultimately extending the service life of the device.

[0058] Optionally, the housing body 111 may be, but is not limited to, square, semi-circular, trapezoidal, or the like, with the cover plate 112 and the opening 111a matching their shapes. When the housing body 111 is semi-circular, the structural member 10 is also semi-circular, resulting in the entire pipeline leak detection device 100 being annular. This makes the overall structure more compact and smaller, facilitating inspection operations on the pipeline 200 under test in confined spaces.

[0059] In some embodiments of the present invention, Figure 7 As shown, the shell body 111 is provided with a snap-fit ​​groove 111b, and the box body 141 is snap-fitted into the snap-fit ​​groove 111b. It is understandable that the shell body 111 and the box body 141 are snap-fitted to achieve a detachable connection between the leak detection mechanism 14 and the shell body 111. This detachable connection is simple in structure and has good reliability.

[0060] Optionally, the snap-fit ​​groove 111b can match the shape of the bottom of the shell body 111, so that the shell body 111 can be snap-fitted into the snap-fit ​​groove 111b in a nested manner. Optionally, the snap-fit ​​groove 111b and the bottom of the shell body 111 can be any one of square, circular, and rectangular.

[0061] Optionally, there may be two snap-fitting grooves 111b, which are provided on opposite sides of the shell body 111. The snap-fitting grooves 111b are U-shaped, and convex edges are provided on opposite sides of the shell body 111, which can be fitted into the snap-fitting grooves 111b.

[0062] In some embodiments of the present invention, Figure 2 and Figure 6 As shown, the shell wall where the semicircular surface 11a is located is provided with a mounting hole 11b. The leak detection mechanism 14 includes a first pipe 145 and a three-way valve 146. The first pipe 145 is provided through the mounting hole 11b. One interface of the three-way valve 146 is connected to the first pipe 145, and the other two interfaces are connected to the air injection unit 142 and the air extraction unit 143, respectively. Optionally, the three-way valve 146 can be a control valve, and can be, but is not limited to, a solenoid valve, an electric valve, etc. The three-way valve 146 can control the first pipe 145 to eject air outward under the action of the air injection unit 142, or to extract air into the closed cavity under the action of the air extraction unit 143.

[0063] In the above technical solution, the air injection unit 142 and the air extraction unit 143 share a first conduit 145 via a three-way valve 146 to inject or extract air into the sealed chamber. This allows the first conduit 145 to serve two purposes, reducing the number of parts and lowering vehicle manufacturing costs. This approach also facilitates flexible switching between air injection and air extraction leak detection, making operation more convenient and facilitating the coordinated use of the two leak detection methods during the leak detection process.

[0064] In some embodiments of the present invention, Figure 7 As shown, the jet portion 142 is a jet pipe, and the structural member 10 includes a gas delivery pipe 16. The gas delivery pipe 16 is arranged in the shell 11, and one end is connected to the jet pipe, and the other end is passed through the shell 11 and is used to pass gas.

[0065] It can be understood that the gas delivery pipeline 16 can be connected to an external gas storage device, such as a high-pressure gas tank. The gas storage device supplies gas to the jet part 142 through the gas delivery pipeline 16, so that the gas can enter the closed cavity through the first pipeline 145. This is conducive to ensuring sufficient gas supply and improving the stability of the leak detection process. It can also simplify the structure of the pipeline leak detection device 100, reduce costs, reduce the weight of the pipeline leak detection device 100, and facilitate operations on the pipeline.

[0066] Alternatively, as Figure 7 As shown, the gas delivery pipe 16 has a first connector 161 and a second connector 162. The first connector 161 is provided on the shell wall of the housing 11 away from the semicircular surface 11a, and the second connector 162 is connected to the gas injection pipe via a hose 17. Optionally, the hose 17 can be, but is not limited to, a metal pipe, a composite material pipe, etc.

[0067] Optionally, the housing 141 of the leak detection mechanism 14 is a rectangular structure, the first pipe 145 is provided on the diagonal line of the housing 141, and the housing 11 is provided with two mounting holes 11b corresponding to the position of each leak detection mechanism 14. The two mounting holes 11b are arranged on the diagonal line of the housing 141, and the first pipe 145 can selectively cooperate with one of the two mounting holes 11b. In this way, the leak detection mechanism 14 can be rotated 180 degrees on the horizontal plane and still ensure that the first pipe 145 and the mounting hole 11b can be assembled, which can reduce the probability of installation errors and improve assembly efficiency. It should be noted that one of the two mounting holes 11b that is not matched with the first pipe 145 can be closed by the housing 141, thereby preventing the closed cavity from communicating with the internal space of the housing 11.

[0068] In some embodiments of the present invention, Figure 6 As shown, the air extraction part 143 includes an air extraction pump 1431, a second pipe 1432 and a third pipe 1433. The air extraction pump 1431 is provided with an air inlet and an air outlet. The second pipe 1432 connects the three-way valve 146 and the air inlet. The third pipe 1433 connects the air outlet and the leak detector 144.

[0069] The vacuum pump 1431 can be a vacuum pump, and further, the vacuum pump can be a rotary vane vacuum pump. When the second leak detection method is used, the three-way valve 146 connects the second pipe 1432 and the first pipe 145, while disconnecting the air injection unit 142 from the first pipe 145. The vacuum pump 1431 extracts air from the sealed cavity through the second pipe 1432. The extracted air then enters the leak detector 144 through the third pipe 1433. The leak detector 144 detects whether the extracted air contains the gas (e.g., helium) from the pipeline 200 to be tested, thereby determining whether the current test section of the pipeline 200 to be tested has a leak.

[0070] In some embodiments of the present invention, the gas injection unit 142 includes a gas storage element equipped with a controllable opening and closing gas outlet valve, which is connected to the three-way valve 146. It is understood that the leak detection mechanism 14 can provide its own gas for injection, thus eliminating the need for an external gas supply device. This avoids the need for long external pipelines and helps improve the mobility of the pipeline leak detection device 100 on the pipeline 200 to be tested.

[0071] In some embodiments of the present invention, the leak detection mechanism 14 includes a feedback component, which is electrically or communicatively connected to the leak detector 144 and configured to issue an alarm message or transmit feedback information when the leak detector 144 detects a leak.

[0072] The feedback component can be a physical indicator that issues a warning message when the leak detector 144 detects a leak. For example, the feedback component can include, but is not limited to, a light-emitting component, a sound-emitting component, a vibrating component, etc., which physically alerts the inspector to the presence of a leak. The feedback component can also be a signal transmission component that transmits leak information when the leak detector 144 detects a leak, allowing an external signal receiving device (such as a receiver or host computer) to remotely detect the leak. The feedback component is a signal transmission component and can be a single-chip microcomputer or a PLC controller.

[0073] In some embodiments of the present invention, Figures 1 to 4 As shown, the moving mechanism includes a plurality of moving units 15, which are spaced apart along the arc length direction of the semicircular surface 11a. The moving unit 15 includes a moving member 151 and a clamping member 152. The clamping member 152 is provided on the housing 11 and connected to the moving member 151, and can drive the moving member 151 to clamp on the pipeline 200 to be tested.

[0074] It is understandable that since the first sealing member 12 and the second sealing member 13 are typically elastic members, they can adapt to a certain range of pipe diameters of the pipeline 200 to be tested. On this basis, the clamping member 152 drives the movable member 151 to clamp on the pipeline 200 to be tested, so that multiple movable units 15 can adapt to pipelines 200 to be tested with different diameters. Moreover, since the clamping member 152 can clamp the movable member 151 on the pipeline 200 to be tested, the pipeline leak detection device 100 can detect leaks not only in horizontal pipelines, but also in vertical pipelines. This can adapt to the detection of more complex pipelines, has better detection flexibility, and is conducive to expanding the application scenarios and adaptability of the pipeline leak detection device 100.

[0075] In some embodiments of the present invention, Figure 2 As shown, the clamping member 152 may include a swing arm 1521 and a driving portion 1522. The driving portion 1522 is disposed on the housing 11 and connected to the swing arm 1521, and is configured to drive the swing arm 1521 to swing. The movable member 151 is disposed on the swing arm 1521. In this manner, the driving portion 1522 can drive the swing arm 1521 to swing, thereby adjusting the angle between the swing arm 1521 and the housing 11, thereby pressing the movable member 151 against the pipeline 200 to be tested, thereby achieving the effect of multiple movable units 15 jointly clamping the pipeline 200 to be tested.

[0076] Alternatively, the drive unit 1522 may be, but is not limited to, a rotary motor, a rotary oil cylinder, or a rotary air cylinder. Alternatively, the swing arm 1521 may be rotatably connected to the housing 11, and the drive unit 1522 may be a telescopic member, and may be, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, or the like. The drive unit 1522 is configured to adjust the swing angle of the swing arm 1521 and the pressure between the moving member 151 and the housing 11.

[0077] In some embodiments of the present invention, the moving member 151 of at least one of the multiple mobile units 15 is configured as a driving component; the moving member 151 includes a running wheel, and at least the portion of the running wheel that contacts the pipeline 200 to be tested is made of an elastic material. All of the moving members 151 of the multiple mobile units 15 can be driving components, or a portion of the moving members 151 can be driving components. The driving component can be a powered running mechanism, for example, a running wheel driven by a motor.

[0078] At least the portion of the traveling wheel that contacts the pipeline 200 to be tested is made of an elastic material. This may refer to the outermost ring structure of the traveling wheel being made of an elastic material, or the entire traveling wheel being made of an elastic material. The elastic material may be, but is not limited to, rubber, a honeycomb structure, etc. Optionally, the traveling wheel is a friction wheel.

[0079] In the above technical solution, the pipeline leak detection device 100 as a whole is capable of autonomous movement, which can improve the overall level of automation. Optionally, the moving member 151, which serves as the driving component, can have remote communication or remote control functions. This facilitates remote control, especially for leak detection scenarios such as high-pressure, toxic, or radioactive gas pipelines that are harmful to the human body. This solution can keep the inspection personnel away from the inspection site, improving the safety of the operation.

[0080] In some embodiments of the present invention, Figure 1 、 Figure 2 and Figure 8 As shown, the housing 11 is provided with moving mechanisms at both ends of the axial direction of the passage 10a. The above scheme can make the two sides of the structural member 10 evenly supported on the pipeline 200 to be tested, improve the movement stability of the structural member 10, and also ensure that the first seal 12 and the second seal 13 have approximately the same compression amount on the pipeline 200 to be tested, thereby ensuring the sealing of the closed cavity, which helps to improve the accuracy of leakage detection. Secondly, in the moving mechanisms on both sides of the structural member 10, since the moving unit 15 includes a moving member 151 and a clamping member 152, the clamping member 152 can clamp the moving member 151 on the pipeline 200 to be tested, so the moving mechanisms on both sides can play a double clamping role, thereby improving the firmness of the pipeline leak detection device 100 on the pipeline 200 to be tested and reducing the risk of detachment during high-altitude operations.

[0081] In some embodiments of the present invention, Figure 2 、 Figure 9 and Figure 10 As shown, the shell 11 is provided with docking ends 1101 located at both radial ends of the semicircular surface 11a, and one of the two corresponding docking ends 1101 of the two structural members 10 is provided with a convex portion 1102, and the other is provided with a concave portion 1103, and the concave portion 1103 and the convex portion 1102 are nested and matched.

[0082] In the above technical solution, the butt ends 1101 of the two housings 11 are nested with the recessed portion 1103 and the raised portion 1102, thereby achieving the installation and positioning of the two housings 11, reducing the installation difficulty of the two housings 11, improving assembly efficiency, and ensuring the installation accuracy of the two housings 11. The nesting of the recessed portion 1103 and the raised portion 1102 also helps to ensure a tighter installation of the two housings 11, thereby improving the installation reliability of the two structural members 10.

[0083] In some embodiments of the present invention, the shell wall of the shell 11 extends outward to form a convex portion 1102 and is recessed inward to form a concave portion 1103. The side wall of the concave portion 1103 is provided with a plurality of first through holes 1103a, and the side wall of the convex portion 1102 is provided with a plurality of second through holes 1102a. A plurality of fasteners are provided between the convex portion 1102 and the concave portion 1103, and each fastener is installed in the first through hole 1103a and the second through hole 1102a.

[0084] Optionally, the fastener may be, but is not limited to, a bolt, a pin, or a clamping column, etc. When the fastener is a bolt, the first through hole 1103a and the second through hole 1102a may be bolt holes.

[0085] In the above technical solution, referring to the previous embodiment, the shell 11 can be opened. After opening the shell 11, a detachable connection between the two shells 11 can be achieved through fasteners, the first through hole 1103a and the second through hole 1102a. This detachable method has a relatively simple structure, high connection reliability, and low cost.

[0086] In some embodiments of the present invention, Figure 9 and Figure 10 As shown, the convex portion 1102 and the concave portion 1103 extend in the axial direction of the passage 10a and are equal to the size of the housing 11 in the axial direction. Figure 1 In this way, the two structural members 10 can be assembled in both the front-to-back direction and the top-to-bottom direction, providing more installation directions and reducing assembly difficulty. In addition, the convex portion 1102 and the concave portion 1103 adopt the above structure to provide a larger bonding surface, which can improve the connection reliability of the two structural members 10.

[0087] In some embodiments of the present invention, Figure 9 and Figure 10 As shown, a plurality of first through holes 1103a are provided on both sides of the width direction of the recess 1103 and are spaced apart along the length direction of the recess 1103. A plurality of second through holes 1102a are provided on both sides of the width direction of the protrusion 1102 and are spaced apart along the length direction of the protrusion 1102. The “width direction of the recess 1103” and the “width direction of the protrusion 1102” can be referred to in Figure 9 and Figure 10 The left and right directions of the "length direction of the concave portion 1103" and the "length direction of the convex portion 1102" can be referred to Figure 9 and Figure 10 In this way, more fasteners can be used, that is, the number of connection points between the concave portion 1103 and the convex portion 1102 can be increased, thereby improving the connection reliability of the two shells 11.

[0088] In some embodiments of the present invention, the connection between the corresponding two butt ends 1101 of the two structural members 10 may include any of a snap connection, a magnetic connection, and an adhesive connection. For example, one of the two opposing butt ends 1101 may be provided with a snap-on protrusion, and the other with a slot, wherein the slot and the butt end can snap into place. In another example, the two opposing butt ends 1101 may be provided with magnetic members that attract each other, and the two magnetic members can be magnetically attracted to each other to achieve a removable connection.

[0089] Throughout this specification, references to terms such as "some embodiments," "optionally," "further," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0090] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A pipeline leak detection device, characterized in that: The device comprises two structural members, which are detachably connected to form a circular passageway for accommodating a pipeline to be tested. The structural members include: The shell is provided with a semicircular surface forming part of the passage, and the shell wall where the semicircular surface is located is provided with a mounting hole; A first sealing member and a second sealing member are provided on the semicircular surface at intervals along the axial direction of the passage, extend along the arc length direction of the semicircular surface, and are flush with both ends of the semicircular surface in the arc length direction. A cavity is defined among the first sealing member, the second sealing member, the semicircular surface, and the pipeline to be tested; A plurality of leak detection mechanisms are arranged in the shell and spaced apart along the arc length direction of the semicircular surface, the leak detection mechanism includes a box body, and an air injection portion, an air extraction portion and a leak detector arranged in the box body, the air injection portion and the air extraction portion can be selectively connected to the cavity, and the leak detector is used to detect the gas extracted by the air extraction portion; the leak detection mechanism includes a first pipe and a three-way valve, the first pipe is passed through the mounting hole, one interface of the three-way valve is connected to the first pipe, and the other two interfaces are respectively connected to the air injection portion and the air extraction portion; the air injection portion is an air injection pipe, and the structural member includes a gas delivery pipe, the gas delivery pipe is arranged in the shell, and one end The gas delivery pipeline is connected to the gas injection pipeline, and the other end is passed through the shell and is used to pass gas; the gas delivery pipeline has a first connector and a second connector, the first connector is passed through the shell wall of the shell away from the semicircular surface, and the second connector is connected to the gas injection pipeline through a hose; the box body is a rectangular structure, the first pipeline is arranged on the diagonal line of the box body, the shell is provided with two mounting holes corresponding to the position of each leak detection mechanism, the two mounting holes are arranged on the diagonal line of the box body, the first pipeline can selectively cooperate with one of the two mounting holes, and the one of the two mounting holes that does not cooperate with the first pipeline is closed by the box body; The moving mechanism is provided on the housing and is used to drive the structural member to move on the pipeline to be tested.

2. The pipeline leak detection device according to claim 1, characterized in that: The shell includes a shell body and a cover plate, the shell body is located at least at one end of the axial direction of the aisle and has an opening, the shell body is provided with the semicircular surface, the number of the cover plates and the openings is equal and one-to-one corresponding, the cover plates are detachably covered on the openings, and multiple leak detection mechanisms are detachably arranged in the shell body.

3. The pipeline leak detection device according to claim 1 or 2, characterized in that: The leak detection mechanism includes a feedback component, which is communicatively connected to the leak detector and is configured to issue a warning message or transmit feedback information to the outside when the leak detector detects a gas leak.

4. The pipeline leak detection device according to claim 1 or 2, characterized in that: The moving mechanism includes a plurality of moving units, which are arranged at intervals along the arc length direction of the semicircular surface. The moving unit includes a moving part and a clamping part. The clamping part is provided on the housing and connected to the moving part, and can drive the moving part to clamp on the pipeline to be tested.

5. The pipeline leak detection device according to claim 4, characterized in that: The moving member of at least one of the plurality of moving units is configured as a driving component; the moving member includes a running wheel, and at least a portion of the running wheel that contacts the pipeline to be measured is made of an elastic material.

6. The pipeline leak detection device according to claim 4, characterized in that: The moving mechanism is provided at both ends of the housing in the axial direction of the passage.

7. The pipeline leak detection device according to claim 2, characterized in that: The shell is provided with butt joints located at both radial ends of the semicircular surface, one of the two corresponding butt joints of the two structural members is provided with a convex portion, and the other is provided with a concave portion, and the concave portion and the convex portion are nested and matched.

8. The pipeline leak detection device according to claim 7, characterized in that: The shell wall of the shell protrudes outward to form the convex part and is recessed inward to form the concave part. The side wall of the concave part is provided with a plurality of first through holes, and the side wall of the convex part is provided with a plurality of second through holes. A plurality of fasteners are provided between the convex part and the concave part, and each of the fasteners is installed in the first through hole and the second through hole.

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