Pipeline leak detection device

Abstract

The invention relates to the field of pipeline leakage detection, and discloses a pipeline leakage detection device, which comprises two structural members, the two structural members are detachably connected and form a circular passage, and each structural member comprises a shell provided with a semicircular surface; the first sealing element and the second sealing element are arranged on the semicircular surface at intervals in the axial direction of the passage, extend in 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 among the first sealing element, the second sealing element, the semicircular surface and the to-be-detected pipeline; the plurality of leak detection mechanisms are arranged in the shell and are arranged at intervals along the arc length direction of the semicircular surface, each leak detection mechanism comprises a box body, and a gas injection part, a gas extraction part and a leak detector which are arranged in the box body, the gas injection part and the gas extraction part are selectively communicated with the cavity, and the leak detector is used for detecting gas extracted by the gas extraction part; and the moving mechanism is arranged on the shell and is used for driving the structural member to walk on the to-be-detected pipeline. According to the invention, the efficiency and the detection accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline leak detection, and more particularly to a pipeline leak detection device. Background Art

[0002] Pipeline leak detection is a key measure to ensure the safe operation of high-risk gas transmission systems in fields such as chemical industry and nuclear power. Its detection performance directly affects production safety. When detecting high-pressure, toxic or radioactive gas pipelines, the detection efficiency of conventional pipeline detection methods is relatively low, and the detection accuracy is not good. Especially in the detection of radioactive gas pipelines, it is difficult for conventional pipeline detection means to effectively give early warning and prevention of potential safety hazards. Therefore, how to further improve the detection efficiency and accuracy of pipeline leak detection has become one of the problems to be solved urgently at present. Summary of the Invention

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

[0004] A pipeline leak detection device according to an embodiment of the present invention includes two structural members. The two structural members are detachably connected to form a circular aisle for accommodating a pipeline to be detected. The structural member includes: a housing provided with a semi-circular surface forming part of the aisle; a first seal and a second seal, which are arranged at intervals along the axial direction of the aisle on the semi-circular surface, extend along the arc length direction of the semi-circular surface, and are flush with both ends of the semi-circular surface in the arc length direction. A cavity is jointly defined among the first seal, the second seal, the semi-circular surface and the pipeline to be detected; a plurality of leak detection mechanisms are arranged in the housing and spaced along the arc length direction of the semi-circular surface. The leak detection mechanism includes a box body, and a jet part, a pumping part and a leak detector arranged in the box body. The jet part and the pumping part can be selectively communicated with the cavity. The leak detector is used to detect the gas pumped out by the pumping part; a moving mechanism is arranged on the housing and used to drive the structural member to move on the pipeline to be detected.

[0005] For the pipeline leak detection device according to an embodiment of the present invention, the pipeline leak detection device with the above structure can move on the pipeline to be detected and perform leak detection on each position passed, which is beneficial to improving the efficiency. Moreover, a plurality of leak detection mechanisms can select any one of two detection methods according to needs, or a combination of the two detection methods. The combination of multiple positions and multiple detection methods is beneficial to improving the detection accuracy.

[0006] In some embodiments of the present invention, the housing includes a housing main body and a cover plate. The housing main body has an opening formed at at least one end in the axial direction of the aisle. The housing main body is provided with the semi-circular surface. The number of the cover plates is equal to and corresponds to the number of the openings one by one. The cover plates are detachably covered on the openings. A plurality of the leak detection mechanisms are detachably arranged in the housing main body.

[0007] In some embodiments of the present invention, the housing wall where the semi-circular surface is located is provided with a mounting hole. The leak detection mechanism includes a first pipeline and a three-way valve. The first pipeline passes through the mounting hole. One interface of the three-way valve is communicated with the first pipeline, and the other two interfaces are respectively communicated with the air jet part and the air extraction part.

[0008] In some embodiments of the present invention, the air jet part is an air jet pipeline. The structural member includes a gas transmission pipeline. The gas transmission pipeline is arranged in the housing, and one end is communicated with the air jet pipeline, and the other end passes through the housing and is used for introducing gas.

[0009] In some embodiments of the present invention, the leak detection mechanism includes a feedback component. The feedback component is electrically connected or communicatively connected to the leak detector, and is configured to send a warning message or transmit feedback information outward when the leak detector detects air leakage.

[0010] In some embodiments of the present invention, the moving mechanism includes a plurality of moving units. The plurality of moving units are arranged at intervals along the arc length direction of the semi-circular surface. The moving unit includes a moving member and a clamping member. The clamping member is arranged on the housing and connected to the moving member, and can drive the moving member to clamp on the pipeline 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 traveling wheel, and at least the part of the traveling wheel in contact with the pipeline to be tested is made of an elastic material.

[0012] In some embodiments of the present invention, the moving mechanisms are provided at both ends of the housing in the axial direction of the aisle.

[0013] In some embodiments of the present invention, the housing is provided with docking ends at the radial two ends of the semi-circular surface. One of the corresponding two docking ends of the two structural members is provided with a convex part, and the other is provided with a concave part. The concave part and the convex part are nested and matched.

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

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the 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 be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 is a schematic perspective view of a pipeline leak detection device provided by some embodiments of the present invention; Figure 2 is an exploded view of a pipeline leak detection device provided by some embodiments of the present invention; Figure 3 is a cross-sectional view of a pipeline leak detection device provided by some embodiments of the present invention in cooperation with a pipeline to be detected; Figure 4 is a front view of a pipeline leak detection device provided by some embodiments of the present invention; Figure 5 is a schematic perspective view of a leak detection mechanism provided by some embodiments of the present invention; Figure 6 is a schematic view of the structure of the leak detection mechanism provided by some embodiments of the present invention after removing the box body; Figure 7 is Figure 3 a partial enlarged schematic view of part I; Figure 8 is a side cross-sectional view of a pipeline leak detection device provided by some embodiments of the present invention; Figure 9 is Figure 2 a partial enlarged schematic view of part II; Figure 10 is Figure 2 a partial enlarged schematic view of part III.

[0017] Reference Signs: 100, pipeline leak detection device; 10, structural member; 10a, aisle; 11, housing; 11a, semi-circular surface; 11b, mounting hole; 111. Housing body; 111a. Open end; 111b. Clamping groove; 112. Cover plate; 1101. Docking end; 1102. Protrusion; 1102a. Second through hole; 1103. Recess; 1103a. First through hole 12. First seal; 13. Second seal 14. Leak detection mechanism; 141. Box body; 142. Jetting part; 143. Air extraction part; 1431. Air extraction pump; 1432. Second pipeline; 1433. Third pipeline; 144. Leak detector; 145. First pipeline; 146. Three-way valve 15. Moving unit; 151. Movable part; 152. Clamping part; 1521. Swing arm; 1522. Driving part 16. Gas transmission pipeline; 161. First connector; 162. Second connector 17. Hose 20. Cavity 200. Pipeline to be tested Detailed implementation mode

[0018] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Reference will be made below Figures 1 - 10 to describe the pipeline leak detection device 100 according to an embodiment of the present invention.

[0021] As Figures 1 to 6 shown, the 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 aisle 10a for accommodating a pipeline 200 to be detected.

[0022] The structural member 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 is provided with a semi-circular surface 11a that forms part of the aisle 10a. The first seal 12 and the second seal 13 are spaced apart along the axial direction of the aisle 10a on the semi-circular surface 11a, extend along the arc length direction of the semi-circular surface 11a, and are flush with both ends of the semi-circular surface 11a in the arc length direction. A cavity 20 is jointly defined among the first seal 12, the second seal 13, the semi-circular surface 11a, and the pipeline 200 to be detected. A plurality of leak detection mechanisms 14 are provided in the housing 11 and are spaced apart along the arc length direction of the semi-circular surface 11a. The leak detection mechanism 14 includes a box body 141, and a gas jetting part 142, a gas pumping part 143, and a leak detector 144 provided in the box body 141. The gas jetting part 142 and the gas pumping part 143 are selectively communicated with the cavity 20, and the leak detector 144 is used to detect the gas pumped out by the gas pumping part 143. The moving mechanism is provided on the housing 11 and is used to drive the structural member 10 to move on the pipeline 200 to be detected.

[0023] 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 are not limited to, sealing rings, etc. According to the shape structure of the semi-circular surface 11a, the first seal 12 and the second seal 13 may be strip-shaped with the same radius and arc length as the semi-circular surface 11a. Among them, as an example, the "axial direction of the aisle 10a" may refer to Figure 1 and Figure 2 the front-back direction.

[0024] Optionally, the first seal 12 and the second seal 13 may be provided at both ends of the semi-circular surface 11a in the axial direction of the aisle 10a, or may refer to a distance from the axial ends with a certain interval, and no specific limitation is made here. Optionally, the surfaces of the first seal 12 and the second seal 13 facing away from the semi-circular surface 11a are configured to have a certain smoothness, which helps the first seal 12 and the second seal 13 to move on the pipeline under test 200 driven by the moving mechanism while ensuring a certain sealing performance, so as to reduce the wear on the pipeline under test 200 and ensure the integrity of the pipeline under test 200.

[0025] The air jet part 142 may refer to a structure or component that can jet air outwards. Similarly, the air extraction part 143 may refer to a structure or component that can extract the gas in the cavity 20. The leak detector 144 may refer to an instrument for detecting gas or liquid leakage. The composition and operation of the leak detector 144 in the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here. The moving mechanism may refer to a device that can drive the entire structural member 10 to walk on the pipeline under test 200, and may be, but not limited to, a robotic arm, robotic legs, rotors, a walking wheel mechanism, and the like.

[0026] When it is necessary to detect the leakage of the pipeline under test 200, the two structural members 10 can be butted and installed on both sides of the pipeline under test 200 and then sleeved on the pipeline under test 200. Since the first seal 12 and the second seal 13 are provided on the semi-circular surface 11a, a sealed cavity (i.e., two cavities 20) will be formed between the semi-circular surfaces 11a of the two structural members 10, the first seal 12, the second seal 13 and the pipeline under test 200. There are multiple leak detection mechanisms 14, which can sample and detect at multiple positions in the sealed cavity, thereby improving the accuracy of detection.

[0027] In the above technical solution, the leak detection mechanism 14 can implement two leak detection methods.

[0028] The first leak detection method: The air jet part 142 can inject gas into the sealed cavity, and the pipeline under test 200 can be evacuated. Whether the gas in the sealed cavity enters the pipeline under test 200 can be detected by the gas detection instrument inside the pipeline under test 200, thereby realizing the leakage detection of the pipeline under test 200. Among them, the gas ejected by the air jet part 142 can be, but not limited to, helium, nitrogen, sulfur hexafluoride, and the like. Optionally, the gas ejected by the air jet part 142 is nitrogen.

[0029] Second leak detection method: The air extraction part 143 can extract the air in the sealed cavity and introduce gas into the pipeline 200 to be tested. Then, the leak detector 144 is used to detect whether the air extracted by the air extraction part 143 contains the gas introduced into the pipeline 200 to be tested. If so, it indicates that there is a leak point at the current position of the pipeline 200 to be tested; if not, it indicates that there is no leak point at the current position of the pipeline 200 to be tested. Among them, the gas introduced into the pipeline 200 to be tested can be, but is not limited to, helium, nitrogen, sulfur hexafluoride, etc. Optionally, the gas introduced into the pipeline 200 to be tested is nitrogen.

[0030] It can be understood that with the leak detection mechanism 14 having two leak detection methods, the applicable range of the pipeline leak detection device 100 can be expanded to adapt to different detection requirements and more flexibly use different usage scenarios. Especially for the leak detection of vacuum pipelines, the pipeline leak detection device 100 can be better applied.

[0031] Since the moving mechanism is provided on the housing 11 and the moving mechanism can drive the pipeline leak detection device 100 to move along the pipeline 200 to be tested, that is to say, the pipeline leak detection device 100 can cruise and detect along the length direction of the pipeline 200 to be tested. The pipeline 200 to be tested can be divided into multiple pipe segments, and the width of each pipe segment is equal to the width of the sealed cavity. The pipeline leak detection device 100 detects one pipe segment each time, thereby enabling the detection of the entire pipeline 200 to be tested during the moving process.

[0032] According to the pipeline leak detection device 100 of the embodiment of the present invention, the pipeline leak detection device 100 with the above structure can walk on the pipeline 200 to be tested and perform leak detection on each position passed, which is beneficial to improving efficiency. Moreover, multiple leak detection mechanisms 14 can select any one of the two leak detection methods according to needs, or combine the two detection methods. Combining multiple positions and multiple detection methods in this way is beneficial to improving the accuracy of detection.

[0033] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the housing 11 includes a housing main body 111 and a cover plate 112. The housing main body 111 forms an opening 111a at at least one end in the axial direction of the aisle 10a. The housing main body 111 is provided with a semi-circular surface 11a. The number of cover plates 112 is equal to and corresponds to the number of openings 111a one by one. The cover plate 112 is detachably covered on the opening 111a, and multiple leak detection mechanisms 14 are detachably arranged in the housing main body 111.

[0034] Optionally, the detachable manner between the cover plate 112 and the housing main body 111 can be, but is not limited to, one of bolt connection, snap connection, bonding, and magnetic attraction connection. Optionally, the connection manner between the leak detection mechanism 14 and the housing main body 111 can be, but is not limited to, one of bolt connection, snap connection, bonding, and magnetic attraction connection.

[0035] In the above technical solution, the housing 11 is a detachable structure, and the cover plate 112 and the housing main body 111 are detachable, so that the housing 11 can be opened, facilitating the installation or disassembly of the leak detection mechanism 14. The plurality of leak detection mechanisms 14 are detachably mounted on the housing main body 111, facilitating the maintenance or replacement of the leak detection mechanism 14. On the other hand, the detachable structure of the housing 11 also helps to hide all other components of the structural member 10 (such as the leak detection mechanism 14, etc.) inside the housing 11, reducing damage caused by collision of other components, ensuring the reliability of other components, and being beneficial to extending the service life of the device.

[0036] Optionally, the housing main body 111 can be, but is not limited to, square, semi-circular, trapezoidal, etc., and the shapes of the cover plate 112 and the opening 111a match. Among them, when the housing main body 111 is semi-circular, the structural member 10 is semi-circular, so that the entire pipeline leak detection device 100 is annular, the overall structure is more compact, the volume is smaller, and it is convenient for the detection operation of the pipeline to be measured 200 in a narrow space.

[0037] In some embodiments of the present invention, as Figure 7 shown, the housing main body 111 is provided with a clamping groove 111b, and the box body 141 is clamped in the clamping groove 111b. It can be understood that the housing main body 111 and the box body 141 are connected in a clamping manner, thereby realizing the detachable connection between the leak detection mechanism 14 and the housing main body 111. This detachable method has a simple structure and good reliability.

[0038] Optionally, the clamping groove 111b can match the shape of the bottom of the housing main body 111, so that the housing main body 111 can be clamped in the clamping groove 111b by nesting. Optionally, the clamping groove 111b and the bottom of the housing main body 111 can be any one of square, circular, and rectangular.

[0039] Optionally, there can be two clamping grooves 111b, which are arranged on opposite sides of the housing main body 111. The clamping groove 111b is U-shaped, and convex edges are provided on opposite sides of the housing main body 111, and the convex edges can be fitted in the clamping groove 111b.

[0040] In some embodiments of the present invention, as Figure 2 and Figure 6As shown in the figure, the shell wall where the semi-circular surface 11a is located is provided with an installation hole 11b. The leak detection mechanism 14 includes a first pipeline 145 and a three-way valve 146. The first pipeline 145 passes through the installation hole 11b. One interface of the three-way valve 146 is communicated with the first pipeline 145, and the other two interfaces are respectively communicated with the air jet part 142 and the air extraction part 143. Optionally, the three-way valve 146 can be a control valve, and can be, but not limited to, an electromagnetic valve, an electric valve, etc. Through the three-way valve 146, it is possible to control the first pipeline 145 to jet air outwards under the action of the air jet part 142, or to extract air into the sealed cavity under the action of the air extraction part 143.

[0041] In the above technical solution, the air jet part 142 and the air extraction part 143 can share the first pipeline 145 through the three-way valve 146 to jet air or extract air into the sealed cavity. Thus, the dual-purpose function of the first pipeline 145 can be realized, the number of parts can be reduced, and the manufacturing cost can be lowered. Adopting the above method is also beneficial to flexibly switching between the air jet leak detection method and the air extraction leak detection method, which is more convenient to operate, and can also facilitate the coordinated use of the two leak detection methods during the leak detection process.

[0042] In some embodiments of the present invention, as Figure 7 shown, the air jet part 142 is an air jet pipeline. The structural member 10 includes a gas transmission pipeline 16. The gas transmission pipeline 16 is arranged inside the housing 11, and one end is communicated with the air jet pipeline, and the other end passes through the housing 11 and is used for introducing gas.

[0043] It can be understood that the gas transmission pipeline 16 can be communicated with an external gas storage device, such as a high-pressure gas tank. The gas storage device supplies gas to the air jet part 142 through the gas transmission pipeline 16, so that the gas can enter the sealed cavity through the first pipeline 145. This is beneficial to ensuring sufficient gas supply, improving the stability of the leak detection process, and 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.

[0044] Optionally, as Figure 7 shown, the gas transmission pipeline 16 has a first connector 161 and a second connector 162. The first connector 161 passes through the shell wall of the housing 11 away from the semi-circular surface 11a, and the second connector 162 is connected to the air jet pipeline through a hose 17. Optionally, the hose 17 can be, but not limited to, a metal pipe, a composite material pipe, etc.

[0045] Optionally, the box body 141 of the leak detection mechanism 14 is of a rectangular structure. The first pipeline 145 is arranged on the diagonal line of the box body 141. At the position corresponding to each leak detection mechanism 14 on the housing 11, there are two mounting holes 11b. The two mounting holes 11b are arranged on the diagonal line of the box body 141. The first pipeline 145 can be selectively matched with one of the two mounting holes 11b. In this way, it can be ensured that the first pipeline 145 and the mounting hole 11b can still be assembled after the leak detection mechanism 14 is rotated 180 degrees on the horizontal plane, which can reduce the probability of installation errors and improve the assembly efficiency. It should be noted that the one of the two mounting holes 11b that is not matched with the first pipeline 145 can be closed by the box body 141, thereby preventing the sealed cavity from communicating with the internal space of the housing 11.

[0046] In some embodiments of the present invention, as Figure 6 shown, the air extraction part 143 includes an air extraction pump 1431, a second pipeline 1432 and a third pipeline 1433. The air extraction pump 1431 is provided with an air inlet and an air outlet. The second pipeline 1432 communicates the three-way valve 146 and the air inlet. The third pipeline 1433 communicates the air outlet and the leak detector 144.

[0047] The air extraction pump 1431 can be a vacuum pump. Further, the vacuum pump can be a rotary vane vacuum pump. When the second leak detection method is adopted, the three-way valve 146 conducts the second pipeline 1432 and the first pipeline 145, and at the same time disconnects the connection between the air jet part 142 and the first pipeline 145. The air extraction pump 1431 extracts the air in the sealed cavity through the second pipeline 1432, and the extracted air then enters the leak detector 144 through the third pipeline 1433. The leak detector 144 can determine whether there is a leak in the current detection pipe section of the pipeline to be measured 200 by detecting whether there is gas (such as helium) in the pipeline to be measured 200 in the extracted air.

[0048] In some embodiments of the present invention, the air jet part 142 includes a gas storage member. The gas storage member is provided with an air outlet valve that can be controlled to open and close. The air outlet valve is connected to the three-way valve 146. It can be understood that the leak detection mechanism 14 can be self-provided with the gas required for air jetting, so there is no need to externally connect a gas supply device. This can avoid externally connecting a long pipeline and is beneficial to improving the moving flexibility of the pipeline leak detection device 100 on the pipeline to be measured 200.

[0049] In some embodiments of the present invention, the leak detection mechanism 14 includes a feedback component. The feedback component is electrically connected or communicatively connected to the leak detector 144 and is configured to issue a warning message or transmit feedback information externally when the leak detector 144 detects a leak.

[0050] The feedback component can refer to a physical indication component, which can send out a warning message when the leak detector 144 detects a gas leak. For example, the feedback component can be, but is not limited to, a light-emitting component, a sound-emitting component, a vibrating component, etc., to let the tester know the occurrence of leakage through physical means. The feedback component can also be a signal transmission component, which can send out the information of the existence of leakage when the leak detector 144 detects a gas leak, and an external signal receiving device (such as a receiver, a host, etc.) can obtain the leakage situation at a remote end. When the feedback component is a signal transmission component, the feedback component can be a single-chip microcomputer or a PLC controller.

[0051] In some embodiments of the present invention, as Figures 1 to 4 shown, the moving mechanism includes a plurality of moving units 15, the plurality of moving units 15 are arranged at intervals along the arc length direction of the semi-circular surface 11a, the moving unit 15 includes a moving member 151 and a clamping member 152, the clamping member 152 is arranged on the housing 11 and is connected to the moving member 151, and can drive the moving member 151 to clamp on the pipeline 200 to be tested.

[0052] It can be understood that since the first sealing member 12 and the second sealing member 13 are usually elastic members, they can adapt to pipelines 200 to be tested with a certain range of pipe diameters. On this basis, the clamping member 152 drives the moving member 151 to clamp on the pipeline 200 to be tested, so that the plurality of moving units 15 can adapt to pipelines 200 to be tested with different diameters. Moreover, since the clamping member 152 can clamp the moving member 151 on the pipeline 200 to be tested, the pipeline leak detection device 100 can not only detect leaks in horizontal pipelines, but also detect leaks in vertical pipelines, so that it can adapt to the detection of more complex pipelines, has better detection flexibility, and is beneficial to expanding the application scenarios and adaptation ranges of the pipeline leak detection device 100.

[0053] In some embodiments of the present invention, as Figure 2 shown, the clamping member 152 can include a swing arm 1521 and a driving part 1522, the driving part 1522 is arranged on the housing 11 and is connected to the swing arm 1521, and is configured to drive the swing arm 1521 to swing, and the moving member 151 is arranged on the swing arm 1521. In this way, the driving part 1522 can drive the swing arm 1521 to swing, thereby adjusting the angle between the swing arm 1521 and the housing 11, and further pressing the moving member 151 on the pipeline 200 to be tested, so as to play the role of clamping the pipeline 200 to be tested by the plurality of moving units 15 together.

[0054] Optionally, the driving part 1522 can be, but is not limited to, a rotary motor, a rotary oil cylinder, a rotary air cylinder, etc. Optionally, the swing arm 1521 can also be rotatably connected to the housing 11, the driving part 1522 can be a telescopic member, and can be, but is not limited to, an air cylinder, a hydraulic cylinder, an electric cylinder, etc. Wherein, the driving member 1522 is configured to be able to adjust the swing angle of the swing arm 1521 and the pressure between the moving member 151 and the housing 11.

[0055] In some embodiments of the present invention, the moving member 151 of at least one of the plurality of moving units 15 is configured as a driving component; the moving member 151 includes a traveling wheel, and at least the part of the traveling wheel in contact with the pipeline to be detected 200 is an elastic material member. The moving members 151 of the plurality of moving units 15 can all be driving components, or a part of the moving members 151 are driving components. The driving component can refer to a traveling mechanism with power, for example, a traveling wheel driven by a motor.

[0056] At least the part of the traveling wheel in contact with the pipeline to be detected 200 being an elastic material member can mean that the outermost circle structure of the traveling wheel is an elastic material member, or the entire traveling wheel is an elastic material member, and the elastic material member can be, but is not limited to, rubber, honeycomb structure, etc. Optionally, the traveling wheel is a friction wheel.

[0057] In the above technical solution, the overall pipeline leak detection device 100 can have the ability of autonomous walking, which can improve the overall automation level. Optionally, the moving member 151 as the driving component can have a remote communication or remote control function, which is convenient for remote control, especially for leak detection scenarios harmful to the human body such as high-pressure, toxic or radioactive gas pipelines. Adopting the above solution can keep the detection personnel away from the detection site and improve the safety of the operation. In some embodiments of the present invention, as Figure 1 、 Figure 2 and Figure 8 shown, moving mechanisms are provided at both ends of the housing 11 in the axial direction of the aisle 10a. Adopting the above solution can enable the two sides of the structural member 10 to be evenly supported on the pipeline to be detected 200, improve the movement stability of the structural member 10, and can also ensure that the first sealing member 12 and the second sealing member 13 have approximately the same compression amount for the pipeline to be detected 200, thereby ensuring the sealing performance of the closed cavity, which helps to improve the accuracy of leak 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, and the clamping member 152 can clamp the moving member 151 on the pipeline to be detected 200, the moving mechanisms on both sides can play a dual clamping role, improve the firmness of the pipeline leak detection device 100 on the pipeline to be detected 200, and reduce the risk of detachment during high-altitude operation.

[0058] In some embodiments of the present invention, as Figure 2, Figure 9 and Figure 10 As shown in Figure 9 and Figure 10 , the housing 11 is provided with docking ends 1101 at the radial two ends of the semi-circular surface 11a. Among the corresponding two docking ends 1101 of the two structural members 10, one 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.

[0059] In the above technical solution, the docking ends 1101 of the two housings 11 are nested and matched through the concave portion 1103 and the convex portion 1102, so as to realize the installation and positioning of the two housings 11, reduce the installation difficulty of the two housings 11, improve the assembly efficiency, and ensure the installation accuracy of the two housings 11. By the way that the concave portion 1103 and the convex portion 1102 are nested with each other, it is also helpful to make the installation of the two housings 11 closer, and thus improve the installation reliability of the two structural members 10.

[0060] In some embodiments of the present invention, the housing wall of the housing 11 protrudes outward to form a convex portion 1102 and recesses 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, the side wall of the convex portion 1102 is provided with a plurality of second through holes 1102a, and 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.

[0061] Optionally, the fastener can be, but is not limited to, a bolt, a pin or a clamping post, etc. When the fastener is a bolt, the first through hole 1103a and the second through hole 1102a can be bolt holes.

[0062] In the above technical solution, referring to the previous embodiment, the housing 11 can be opened. After the housing 11 is opened, the detachable connection between the two housings 11 can be realized through the fasteners, the first through holes 1103a and the second through holes 1102a. Adopting this detachable method, the structure is relatively simple, the connection reliability is high, and the cost is also low.

[0063] In some embodiments of the present invention, as Figure 9 and Figure 10 shown, the convex portion 1102 and the concave portion 1103 extend along the axial direction of the aisle 10a and are equal in size to the housing 11 in the axial direction. Combining Figure 1 , in this way, the two structural members 10 can be assembled in the front-back direction and can also be assembled in the up-down direction, which can provide more installation directions and reduce the assembly difficulty. Moreover, the convex portion 1102 and the concave portion 1103 having the above structure have a larger joint surface, which can improve the connection reliability of the two structural members 10.

[0064] In some embodiments of the present invention, as Figure 9 and Figure 10 ​​As shown, a plurality of first through holes 1103a are provided on both sides in the width direction of the concave portion 1103 and are spaced apart in the length direction of the concave portion 1103. A plurality of second through holes 1102a are provided on both sides in the width direction of the convex portion 1102 and are spaced apart in the length direction of the convex portion 1102. The "width direction of the concave portion 1103" and the "width direction of the convex portion 1102" can be referred to as Figure 9 and Figure 10 the left - right direction, and the "length direction of the concave portion 1103" and the "length direction of the convex portion 1102" can be referred to as Figure 9 and Figure 10 the front - back direction. 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 housings 11.

[0065] In some embodiments of the present invention, the connection method between the two corresponding docking ends 1101 of the two structural members 10 may include any one of snap - connection, magnetic - attraction connection, and bonding. For example, a snap - projection is provided on one of the two opposite docking ends 1101, and a snap - groove is provided on the other, and the snap - groove and the snap - projection can be snap - connected. Also, for example, magnetic - attraction members that attract each other are provided on the two opposite docking ends 1101, and the two magnetic - attraction members attract each other to achieve detachable connection.

[0066] In the description of this specification, the description with reference to terms such as "some embodiments", "optionally", "further", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above - mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pipeline leak detection device, characterized in that, It includes two structural members. The two structural members are detachably connected to form a circular aisle for accommodating a pipeline to be tested. The structural member includes: A housing provided with a semi-circular surface forming part of the aisle; A first seal and a second seal, which are arranged at intervals along the axial direction of the aisle on the semi-circular surface, extend along the arc length direction of the semi-circular surface, and are flush with both ends of the semi-circular surface in the arc length direction. A cavity is jointly defined among the first seal, the second seal, the semi-circular surface and the pipeline to be tested; A plurality of leak detection mechanisms are arranged in the housing and are spaced along the arc length direction of the semi-circular surface. The leak detection mechanism includes a box body, and a jet part, a suction part and a leak detector arranged in the box body. The jet part and the suction part can be selectively communicated with the cavity, and the leak detector is used for detecting the gas extracted by the suction part; A moving mechanism is arranged on the housing and is used for driving 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 housing includes a housing main body and a cover plate. The housing main body forms an opening at at least one end in the axial direction of the aisle. The housing main body is provided with the semi-circular surface. The number of the cover plates is equal to and corresponds to the number of the openings one by one. The cover plates are detachably covered on the openings, and a plurality of the leak detection mechanisms are detachably arranged in the housing main body.

3. The pipeline leak detection device according to claim 2, wherein, The housing wall where the semi-circular surface is located is provided with an installation hole. The leak detection mechanism includes a first pipeline and a three-way valve. The first pipeline penetrates through the installation hole. One interface of the three-way valve is communicated with the first pipeline, and the other two interfaces are respectively communicated with the jet part and the suction part.

4. The pipeline leak detection device according to claim 3, characterized in that, The jet part is a jet pipeline. The structural member includes a gas transmission pipeline, which is arranged in the housing, has one end communicated with the jet pipeline, and the other end penetrates through the housing and is used for introducing gas.

5. The pipeline leak detection device according to any one of claims 1 to 4, characterized in that, The leak detection mechanism includes a feedback component, which is electrically connected or communicatively connected to the leak detector and is configured to send a warning message or transmit feedback information outward when the leak detector detects air leakage.

6. 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 spaced along the arc length direction of the semi-circular surface. The moving unit includes a moving member and a clamping member. The clamping member is arranged on the housing and is connected to the moving member, and can drive the moving member to clamp on the pipeline to be tested.

7. The pipeline leak detection device according to claim 6, 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 traveling wheel, and at least the part of the traveling wheel in contact with the pipeline to be tested is made of an elastic material.

8. The pipeline leak detection device according to claim 6, characterized in that, The moving mechanism is arranged at both ends of the housing in the axial direction of the aisle.

9. The pipeline leak detection device according to claim 2, characterized in that, The housing is provided with docking ends at the two radial ends of the semi-circular surface. One of the corresponding two docking ends of the two structural members is provided with a convex part, and the other is provided with a concave part. The concave part and the convex part are nested and matched.

10. The pipeline leak detection device according to claim 9, characterized in that, The shell wall of the housing protrudes outward to form the convex part and depresses inward to form the concave part. A plurality of first through holes are provided on the side wall of the concave part, and a plurality of second through holes are provided on the side wall of the convex part. 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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