Oil and gas pipeline leakage detection device

Abstract

The invention relates to the technical field of pipeline leakage detection, in particular to an oil and gas pipeline leakage detection device. The oil and gas pipeline leakage detection device comprises a detection box and a detector, the detection box comprises an upper box body, a lower box body and various sealing plates, the sealing plates are provided with accommodating grooves for oil and gas pipelines to penetrate through, and the various sealing plates are respectively provided with accommodating grooves. Sealing plates of the same kind are detachably mounted at the two ends of the upper box body and the lower box body in the width direction. The upper box body is buckled with or opened from the lower box body, the upper box body is buckled with the lower box body, the two sealing plates at the same end in the width direction are connected in a spliced mode, so that the upper box body, the lower box body and the sealing plates define a closed cavity, and the containing grooves of the two sealing plates connected in a spliced mode define a mounting hole capable of tightly holding the periphery of the oil and gas pipeline in a sealed mode. The detector is installed on the detection box and can detect whether the oil and gas pipeline located in the closed cavity leaks or not. The oil and gas pipeline leakage detection device can carry out leakage detection on oil and gas pipelines of different sizes, and the universality is improved.

Description

Technical Field

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

[0002] Natural gas resources are usually transported over long distances through oil and gas pipelines. As the service time of oil and gas pipelines increases, the pipelines are vulnerable to corrosion by the external environment and internal natural gas, as well as the influence of natural gas pressure, resulting in natural gas leakage prone to occur at the joints of oil and gas pipelines. It is necessary to regularly use leakage detection devices to detect oil and gas pipelines in order to timely discover the leakage locations.

[0003] Existing leakage detection devices are limited by their inherent detection components and can only detect the leakage of oil and gas pipelines of a single specification, with poor versatility. In the face of the leakage detection requirements of oil and gas pipelines of different specifications, it is necessary to purchase and use different models of leakage detection devices for detection operations, increasing the leakage detection cost. Summary of the Invention

[0004] The purpose of the present invention is to provide an oil and gas pipeline leakage detection device to improve the versatility of the oil and gas pipeline leakage detection device and reduce the leakage detection cost.

[0005] To achieve this purpose, the technical solution adopted by the present invention is as follows:

[0006] An oil and gas pipeline leakage detection device, comprising:

[0007] A detection box, the detection box includes an upper box body, a lower box body and a variety of sealing plates, the sealing plates are provided with accommodation grooves for the oil and gas pipelines to pass through, and the various sealing plates are respectively provided with accommodation grooves adapted to oil and gas pipelines of different outer diameters; the same kind of sealing plate is detachably installed at both ends of the upper box body and the lower box body along the width direction;

[0008] The upper box body can be buckled or opened with respect to the lower box body; when the upper box body is buckled on the lower box body, two sealing plates at the same end along the width direction are spliced and connected, so that the upper box body, the lower box body and the sealing plates enclose a sealed cavity; and the accommodation grooves of the two spliced and connected sealing plates form an installation hole capable of sealing and clamping the outer circumference of the oil and gas pipeline.

[0009] A detector, installed in the detection box and configured to be able to detect whether the oil and gas pipeline located in the sealed cavity leaks.

[0010] As an alternative, first mounting grooves are provided at both ends of the upper box body along the width direction, second mounting grooves are provided at both ends of the lower box body along the width direction, and the same sealing plate is selectively inserted and mounted in the first mounting groove and the second mounting groove.

[0011] As an alternative, one end of the upper box body along the length direction is rotatably arranged at one end of the lower box body along the length direction;

[0012] When the upper box body is buckled on the lower box body, the other end of the upper box body along the length direction is tightly connected to the other end of the lower box body along the length direction.

[0013] As an alternative, a detection hole is further provided in the upper box body, a sleeve is sleeved in the detection hole, an elastic membrane is covered at the bottom end of the sleeve, and the outer peripheral edge of the elastic membrane is clamped between the outer side of the circumference of the sleeve and the inner wall of the detection hole; a signal switch is arranged at the other end of the sleeve, and the signal switch is configured to be able to emit a trigger signal when triggered; a push rod is slidably arranged along the axial direction in the sleeve, one end of the push rod abuts against the elastic membrane, and the other end of the push rod abuts against the signal switch;

[0014] The elastic membrane is configured to be able to sink towards the inside of the sleeve when being pressed, so as to push the push rod to move along the axial direction of the sleeve towards the signal switch and trigger the signal switch.

[0015] As an alternative, the oil and gas pipeline leakage detection device further includes a storage box, a plurality of partition plates are arranged in the storage box, and the plurality of partition plates divide the interior of the storage box into a plurality of accommodation grooves, and the various sealing plates are selectively placed in the corresponding accommodation grooves.

[0016] As an alternative, the storage box includes an outer shell and an inner shell, one end of the inner shell is rotatably arranged at one end of the outer shell, so that the inner shell has a closed position extending into the outer shell and a picking and placing position extending out of the outer shell; a plurality of the partition plates are arranged at intervals in the inner shell to form a plurality of the accommodation grooves inside the inner shell.

[0017] As an alternative, the oil and gas pipeline leakage detection device further includes a mobile platform and a cleaning mechanism, the lower box body is arranged on the mobile platform, and the cleaning mechanism includes:

[0018] A cleaning driving member, arranged on the lower box body;

[0019] A cleaning bracket, slidably arranged along the width direction on the mobile platform and located on one side of the detection box along the width direction; the cleaning driving member is in transmission connection with the cleaning bracket;

[0020] A brush plate is installed on the cleaning bracket to clean the outer surface of the oil and gas pipeline.

[0021] As an alternative, the cleaning bracket includes:

[0022] A first bracket is slidably arranged on the moving platform along the width direction;

[0023] A second bracket is rotatably arranged at one end of the first bracket along the length direction to buckle or open the first bracket; the first bracket and the second bracket are both installed with the brush plate. When the second bracket buckles on the first bracket, the bristles of the two brush plates surround and abut against the outer periphery of the oil and gas pipeline.

[0024] As an alternative, the oil and gas pipeline leakage detection device further includes a moving platform, a base and a lifting mechanism. The lower box body is arranged on the moving platform, the lifting mechanism is arranged on the base, and the output end of the lifting mechanism is supported and connected to the moving platform to drive the moving platform to lift and move in the height direction.

[0025] As an alternative, the lifting mechanism includes:

[0026] A lifting driving member is arranged on the base;

[0027] A worm and a worm gear, the output end of the lifting driving member is connected to the worm, the worm is meshed with the worm gear for transmission, and the worm shaft of the worm gear is threadedly connected to the moving platform.

[0028] The beneficial effects of the present invention are as follows:

[0029] The oil and gas pipeline leakage detection device provided by the present invention has the upper box body buckled on the lower box body, so that the upper box body, the lower box body and the sealing plates installed on the upper box body and the lower box body jointly enclose a sealed cavity. At this time, the receiving grooves of the two spliced sealing plates form an installation hole and tightly hold the outer periphery of the oil and gas pipeline through the installation hole to ensure the sealing performance of the sealed cavity. The detector is used to detect whether the oil and gas pipeline located in the sealed cavity leaks. Since the receiving grooves of different sealing plates can be adapted to oil and gas pipelines with different outer diameters, only by replacing the sealing plates of the upper box body and the lower box body can the leakage detection of oil and gas pipelines with different outer diameters be realized. The operation is simple, the versatility of the oil and gas pipeline leakage detection device is improved, and the cost of leakage detection is reduced. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of the oil and gas pipeline leakage detection device provided by the embodiment of the present invention;

[0031] Figure 2It is a schematic structural diagram of the opened detection box and the cleaning mechanism provided by an embodiment of the present invention;

[0032] Figure 3 It is a schematic structural diagram of the opened storage box provided by an embodiment of the present invention;

[0033] Figure 4 It is a schematic structural diagram of the detection box and the cleaning mechanism provided by an embodiment of the present invention;

[0034] Figure 5 It is a sectional view of the detection box provided by an embodiment of the present invention;

[0035] Figure 6 It is a sectional view of the base, the lifting mechanism and the moving platform provided by an embodiment of the present invention.

[0036] The names and marks of the components in the figure are as follows:

[0037] 1. Detection box; 11. Upper box body; 111. Detection hole; 12. Lower box body; 13. Sealing plate; 131. Accommodating groove; 2. Detector; 31. Sleeve; 32. Elastic membrane; 33. Signal switch; 34. Thumb rod; 35. Pressing cover; 4. Storage box; 41. Outer shell; 42. Inner shell; 43. Partition board; 5. Moving platform; 51. Sliding sleeve; 52. Guide sleeve; 6. Cleaning mechanism; 61. Cleaning driving part; 62. Cleaning bracket; 621. First bracket; 622. Second bracket; 63. Brush plate; 64. Slide rail; 65. First guide post; 7. Base; 71. Pushing frame; 8. Lifting mechanism; 81. Lifting driving part; 82. Worm; 83. Worm gear; 84. Second guide post; 9. Control module; 10. Universal wheel. Detailed implementation manners

[0038] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that, for the sake of convenience of description, only parts related to the present invention are shown in the drawings, rather than all of them.

[0039] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 internal communication of two components or the interaction relationship between 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 situations.

[0040] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", "left", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific implementation manners.

[0043] The existing leakage detection devices are limited by the inherent detection components and can only detect the leakage of oil and gas pipelines of a single specification, with poor versatility. In the face of the leakage detection requirements for oil and gas pipelines of different specifications, it is necessary to purchase and use different models of leakage detection devices for detection operations, increasing the leakage detection cost.

[0044] To solve the above problems, as Figure 1 and Figure 2As shown in the figure, the oil and gas pipeline leakage detection device includes a detection box 1 and a detector 2. The detection box 1 includes an upper box body 11, a lower box body 12 and a variety of sealing plates 13. The sealing plates 13 are provided with accommodation grooves 131 for the oil and gas pipeline to pass through. The variety of sealing plates 13 are respectively provided with accommodation grooves 131 adapted to oil and gas pipelines with different outer diameters. At both ends of the upper box body 11 and the lower box body 12 in the width direction (the front-back direction in the figure), the same kind of sealing plate 13 is detachably installed. The upper box body 11 can be buckled or opened with respect to the lower box body 12. When the upper box body 11 is buckled on the lower box body 12, the two sealing plates 13 at the same end in the width direction are spliced and connected, so that the upper box body 11, the lower box body 12 and the sealing plates 13 enclose an airtight cavity, and the accommodation grooves 131 of the two spliced and connected sealing plates 13 form an installation hole capable of tightly sealing and holding the outer periphery of the oil and gas pipeline. The detector 2 is installed in the detection box 1 and is configured to be able to detect whether the oil and gas pipeline located in the airtight cavity leaks. The upper box body 11 is buckled on the lower box body 12, so that the upper box body 11, the lower box body 12 and the sealing plates 13 installed on the upper box body 11 and the lower box body 12 jointly enclose an airtight cavity. At this time, the accommodation grooves 131 of the two spliced and connected sealing plates 13 form an installation hole and tightly hold the outer periphery of the oil and gas pipeline through the installation hole to ensure the sealing performance of the airtight cavity. The detector 2 is used to detect whether the oil and gas pipeline located in the airtight cavity leaks. Since the accommodation grooves 131 of different sealing plates 13 can be adapted to oil and gas pipelines with different outer diameters, only by replacing the sealing plates 13 of the upper box body 11 and the lower box body 12 can the leakage detection of oil and gas pipelines with different outer diameters be realized. The operation is simple, the versatility of the oil and gas pipeline leakage detection device is improved, and the cost of leakage detection is reduced.

[0045] In this embodiment, the detector 2 is installed on the upper box body 11 by threading to achieve the stable installation of the detector 2 and at the same time facilitate the disassembly and replacement of the detector 2. In addition, a sealing gasket is installed between the detector 2 and the upper box body 11 to ensure that the detector 2 is sealed and installed on the upper box body 11, avoiding damage to the sealing performance of the airtight space inside the detection box 1. The main gas transported in the oil and gas pipeline in this embodiment is natural gas. When natural gas leaks, the detector 2 can detect the leaked natural gas in the airtight cavity, thereby determining that the oil and gas pipeline has leaked, and can know whether the leakage is serious according to the detected gas concentration. Since the detector 2 for detecting natural gas is a prior art, the structure and working principle of the detector 2 will not be elaborated here. In other embodiments, other gases can also be transported in the oil and gas pipeline, and the type and detection type of the detector 2 can be adaptively replaced and adjusted, which will not be specifically limited here.

[0046] As Figure 2As shown in the figure, first mounting grooves are formed at both ends of the upper box body 11 in the width direction, and second mounting grooves are formed at both ends of the lower box body 12 in the width direction. The same sealing plate 13 is selectively inserted and mounted in the first mounting groove and the second mounting groove. The sealing plate 13 is inserted and mounted with both the upper box body 11 and the lower box body 12, making the disassembly and assembly operation of the sealing plate 13 simple and improving the replacement efficiency of the sealing plate 13.

[0047] Specifically, first mounting grooves are formed at the front and rear ends of the upper box body 11 in the width direction, so that sealing plates 13 are mounted at both the front and rear ends of the upper box body 11. Second mounting grooves are formed at the front and rear ends of the lower box body 12 in the width direction, so that sealing plates 13 are mounted at both the front and rear ends of the lower box body 12. When the oil and gas pipeline to be detected is sequentially placed in the receiving grooves 131 of the sealing plates 13 at the front and rear ends of the lower box body 12, the upper box body 11 is buckled with the lower box body 12, so that the two sealing plates 13 at the front end of the detection box 1 are spliced and connected, and the two sealing plates 13 at the rear end of the detection box 1 are spliced and connected, so that the mounting holes formed at both the front and rear ends of the detection box 1 tightly hold the outer periphery of the oil and gas pipeline, thereby keeping the sealed cavity of the detection box 1 with the installed oil and gas pipeline in good sealing performance and improving the accuracy of leakage detection. It should be noted that the sealing plate 13 is a rubber plate, so that the sealing plate 13 has a certain elasticity, so as to enable the mounting hole to elastically hold the oil and gas pipeline to ensure the sealing effect between the sealing plate 13 and the oil and gas pipeline.

[0048] As Figure 2 shown in the figure, one end of the upper box body 11 in the length direction (the left - right direction in the figure) is rotatably arranged at one end of the lower box body 12 in the length direction. When the upper box body 11 is buckled on the lower box body 12, the other end of the upper box body 11 in the length direction is tightly connected with the other end of the lower box body 12 in the length direction. Through the above - mentioned setting, the upper box body 11 makes a flipping motion relative to the lower box body 12 to realize the rotational opening and closing of the upper box body 11 and the lower box body 12. When the upper box body 11 is buckled on the lower box body 12, the other end of the upper box body 11 in the length direction is locked with the other end of the lower box body 12 in the length direction by screws to improve the buckling strength of the upper box body 11 and the lower box body 12, ensure the sealing performance between the upper box body 11 and the lower box body 12, and at the same time enable the two spliced and connected sealing plates 13 to keep in a tightly pressed state, further improving the sealing performance of the sealed cavity in the detection box 1.

[0049] As Figure 1 and Figure 3As shown in the figure, the oil and gas pipeline leakage detection device further includes a base 7 and a storage box 4, and the storage box 4 is arranged on the base 7. A plurality of partition plates 43 are arranged in the storage box 4, and the plurality of partition plates 43 divide the interior of the storage box 4 into a plurality of accommodation grooves, and a variety of sealing plates 13 are selectively placed in the corresponding accommodation grooves. By providing the storage box 4 and dividing the interior of the storage box 4 into accommodation grooves by the partition plates 43, it is convenient to separately place different sealing plates 13 in different accommodation grooves, realizing the separate classification storage of a variety of sealing plates 13 and facilitating the classification and picking and placing operations of the sealing plates 13.

[0050] Specifically, as Figure 3 shown, the storage box 4 includes an outer shell 41 and an inner shell 42. One end of the inner shell 42 is rotatably arranged at one end of the outer shell 41, so that the inner shell 42 has a closed position extending into the outer shell 41 and a picking and placing position extending out of the outer shell 41. A plurality of partition plates 43 are arranged at intervals in the inner shell 42 to form a plurality of accommodation grooves inside the inner shell 42. By rotating the inner shell 42, the sealing plate 13 in the inner shell 42 is exposed, so as to realize the quick picking of the sealing plate 13. In this embodiment, the inner shell 42 rotates 90° relative to the outer shell 41 to extend out of the outer shell 41; after the picking operation of the sealing plate 13 is completed, only by rotating the inner shell 42 reversely by 90°, the inner shell 42 can be reset and buckled inside the outer shell 41, with simple operation and improved picking efficiency of the sealing plate 13.

[0051] As Figure 1 、 Figure 2 and Figure 4 shown, the oil and gas pipeline leakage detection device further includes a mobile platform 5 and a cleaning mechanism 6. A lower box body 12 is arranged on the mobile platform 5. The cleaning mechanism 6 includes a cleaning driving member 61, a cleaning bracket 62 and a brush plate 63, and the cleaning driving member 61 is arranged on the lower box body 12. The cleaning bracket 62 is slidably arranged on the mobile platform 5 along the width direction and is located on one side of the detection box 1 along the width direction. The cleaning driving member 61 is in transmission connection with the cleaning bracket 62. The brush plate 63 is installed on the cleaning bracket 62 to clean the outer surface of the oil and gas pipeline. By providing the cleaning mechanism 6, the outer surface of the oil and gas pipeline before detection can be cleaned to brush off impurities, dust, etc. attached to the outer surface of the oil and gas pipeline, so that the sealing plate 13 tightly seals around the outer circumference of the oil and gas pipeline, improving the sealing performance of the closed cavity of the detection box 1 and thus ensuring the accuracy of leakage detection.

[0052] Specifically, the cleaning bracket 62 includes a first bracket 621 and a second bracket 622. The first bracket 621 is slidably arranged on the moving platform 5 in the width direction. One end of the second bracket 622 in the length direction is rotatably arranged at one end of the first bracket 621 in the length direction to buckle or open the first bracket 621. Brush plates 63 are installed on both the first bracket 621 and the second bracket 622. When the second bracket 622 buckles on the first bracket 621, the bristles of the two brush plates 63 surround and abut against the outer periphery of the oil and gas pipeline. The structure of the brush plate 63 in this embodiment is basically the same as that of the sealing plate 13, and the bristles of the brush plate 63 are arranged in an arc shape. When the two brush plates 63 are spliced, the bristles on the two brush plates 63 form a cleaning hole with the same size as the installation hole, so that the bristles can surround the outer surface of the oil and gas pipeline. It should be noted that the brush plate 63 is installed on the first bracket 621 and the second bracket 622 by plugging or threaded connection, and the sizes of the cleaning holes formed by the bristles of the brush plates 63 of different sizes are different, and the brush plate 63 with a suitable size can be flexibly selected according to the outer diameter of different oil and gas pipelines. Therefore, the sealing plate 13 and the brush plate 63 corresponding to the same oil and gas pipeline can be placed in the same accommodation groove in the storage box 4 together, realizing the rapid selection, disassembly and assembly of the brush plate 63.

[0053] In this embodiment, the first bracket 621 and the second bracket 622 are rotationally matched. When the first bracket 621 is flipped to the outside of the second bracket 622, the brush plate 63 can be disassembled and assembled from the cleaning bracket 62. The first bracket 621 is flipped above the second bracket 622 and snap-fitted and fixed to improve the structural stability of the cleaning bracket 62. At this time, the bristles of the two brush plates 63 form a cleaning hole adapted to the oil and gas pipeline, that is, the bristles surround and abut against the outer periphery of the oil and gas pipeline. The cleaning driving member 61 is two motors. The two motors are arranged at intervals in the length direction on the lower box body 12, and the push rods of the two motors are connected to the cleaning bracket 62 to synchronously drive the cleaning bracket 62 to move back and forth in the width direction, so as to clean the outer surface of the oil and gas pipeline through the brush plate 63.

[0054] As Figure 1 and Figure 4 shown, two slide rails 64 are arranged on the moving platform 5 in the width direction, and the two slide rails 64 are arranged at intervals in the length direction. The second bracket 622 is slidably arranged on the two slide rails 64. The slide rails 64 realize the limit and guidance of the sliding process of the cleaning bracket 62, so that the cleaning bracket 62 can move back and forth smoothly and stably in the width direction.

[0055] Further, two first guide posts 65 are detachably mounted on the first bracket 621. After the first bracket 621 is snap-fitted and fixed to the second bracket 622, one end of each of the two first guide posts 65 is fixed to the first bracket 621, and the other end of each of the two first guide posts 65 passes through the upper box body 11 (at this time, the upper box body 11 is buckled on the lower box body 12) to limit and guide the sliding process of the cleaning bracket 62 through the first guide posts 65, so that the cleaning bracket 62 moves more smoothly and stably in the front-back direction along the width direction.

[0056] As Figure 4 and Figure 5 shown, the upper box body 11 is further provided with a detection hole 111. A sleeve 31 is sleeved in the detection hole 111. An elastic membrane 32 is provided at the bottom end of the sleeve 31. The outer peripheral edge of the elastic membrane 32 is clamped between the outer circumference of the sleeve 31 and the inner wall of the detection hole 111. A signal switch 33 is provided at the other end of the sleeve 31. The signal switch 33 is configured to emit a trigger signal when triggered. A push rod 34 is slidably arranged axially in the sleeve 31. One end of the push rod 34 abuts against the elastic membrane 32, and the other end of the push rod 34 abuts against the signal switch 33. The elastic membrane 32 is configured to be recessed toward the inside of the sleeve 31 when pressed, so as to push the push rod 34 to move axially along the sleeve 31 toward the signal switch 33 and trigger the signal switch 33. Through the above arrangement, on the basis of the detector 2, secondary detection of the leakage of the oil and gas pipeline can be realized, the accuracy of leakage detection is further improved, and at the same time, when the oil and gas pipeline located in the detection box 1 leaks, the signal switch 33 can be triggered in time and a trigger signal can be emitted through the signal switch 33 to remind the detection personnel to timely discover the leakage position of the oil and gas pipeline.

[0057] Specifically, a gland 35 is threadedly mounted at the top end of the sleeve 31. The signal switch 33 is movably mounted in the gland 35. The push rod 34 movably passes through the sleeve 31. The elastic membrane 32 is a rubber membrane with a relatively thin thickness, so that the elastic membrane 32 has good elasticity and can be deformed by depression when pressed. Moreover, the outer peripheral edge of the elastic membrane 32 is clamped between the outer circumference of the sleeve 31 and the inner wall of the detection hole 111, which not only realizes the stable installation of the elastic membrane 32, but also enables the sleeve 31 and the detection hole 111 to maintain good sealing through the elastic membrane 32, avoiding damage to the sealing performance of the closed space.

[0058] When the leak detection starts, if the natural gas in the oil and gas pipeline leaks, the detector 2 can detect a small amount of leakage. As the amount of natural gas leakage increases, the air pressure in the closed cavity in the detection box 1 increases accordingly, so that the elastic membrane 32 is compressed and recessed toward the inside of the sleeve 31, so as to push the push rod 34 to move along the axial direction of the sleeve 31 toward the signal switch 33 and trigger the signal switch 33. After the signal switch 33 is triggered, a trigger signal is sent to the control module 9 of the oil and gas pipeline leakage detection device. After receiving the trigger signal, the control module 9 sends a leakage alarm. The leakage alarm can be an audible and visual alarm or other alarm methods, which are not specifically limited here. The natural gas in the oil and gas pipeline is confirmed to have leaked by the air pressure change in the closed cavity in the detection box 1. Then, the concentration of the gas detected by the detector 2 is used to determine whether the leakage is serious. The control module 9 is a prior art, and the structure and working process of the control module 9 are not described in detail.

[0059] like Figure 1 and Figure 6 As shown, the oil and gas pipeline leakage detection device also includes a lifting mechanism 8, a lower box 12 is provided on the mobile platform 5, and the base 7 is provided with the lifting mechanism 8. The output end of the lifting mechanism 8 is connected to the support of the mobile platform 5 to drive the mobile platform 5 to move up and down in the height direction (up and down direction in the figure). The lifting mechanism 8 drives the mobile platform 5 to move up and down to adjust the position of the detection box 1 in the height direction, so that the detection box 1 is adapted to oil and gas pipelines of different heights, further improving the versatility of the oil and gas pipeline leakage detection device.

[0060] Specifically, the lifting mechanism 8 includes a lifting drive member 81, a worm 82 and a worm wheel 83. The lifting drive member 81 is arranged on the base 7. The output end of the lifting drive member 81 is connected to the worm 82. The worm 82 and the worm wheel 83 are meshed and driven. The worm wheel shaft of the worm wheel 83 is threadedly connected to the mobile platform 5. Through the self-locking property of the worm 82 and the worm wheel 83, the mobile platform 5 will not fall after being lifted and moved into position, thereby improving the stability of the position adjustment of the mobile platform 5.

[0061] In this embodiment, the lifting drive member 81 is a motor, the output end of the motor is connected to the worm 82, and the worm 82 is meshed with two worm wheels 83 for transmission. The mobile platform 5 is provided with two sleeves 51 downwardly, and the sleeves 51 have internal threads, so that the worm shafts of the two worm wheels 83 are screwed and installed in the corresponding sleeves 51 respectively. When the lifting drive member 81 drives the two worm wheels 83 to rotate through the worm 82, the worm shafts of the worm wheels 83 rotate in the corresponding sleeves 51 to push the mobile platform 5 and the detection box 1 to move up and down, thereby raising or lowering the detection box 1 to the height where the oil and gas pipeline is located.

[0062] Furthermore, if Figure 6As shown, a plurality of guide sleeves 52 are provided downward on the mobile platform 5, and a plurality of second guide posts 84 are provided on the base 7. The second guide posts 84 extend in the height direction and are slidably arranged in the corresponding guide sleeves 52. Through the sliding fit between the guide sleeves 52 and the second guide posts 84, the guiding and limiting of the lifting process of the mobile platform 5 are realized, avoiding the bending damage of the worm shaft of the worm gear 83, and improving the stability and reliability of the lifting process of the mobile platform 5.

[0063] As Figure 1 and Figure 6 shown, universal wheels 10 are provided at the corner positions of the bottom of the base 7, so that the oil and gas pipeline leakage detection device can be smoothly moved to different detection positions through the universal wheels 10, improving the convenience of the movement of the oil and gas pipeline leakage detection device. At the same time, a push frame 71 is also provided on one side of the base 7, so that the detection personnel can hold the push frame 71 to push the oil and gas pipeline leakage detection device to the detection position.

[0064] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An oil and gas pipeline leakage detection device, characterized in that, Comprising: A detection box (1), the detection box (1) includes an upper box body (11), a lower box body (12) and a variety of sealing plates (13), the sealing plates (13) are provided with accommodation grooves (131) for the oil and gas pipeline to pass through, and the variety of sealing plates (13) are respectively provided with accommodation grooves (131) adapted to the oil and gas pipelines with different outer diameters; both ends of the upper box body (11) and the lower box body (12) in the width direction are detachably installed with the same kind of sealing plate (13); The upper box body (11) can be buckled or opened with respect to the lower box body (12); when the upper box body (11) is buckled on the lower box body (12), two sealing plates (13) at the same end in the width direction are spliced and connected, so that the upper box body (11), the lower box body (12) and the sealing plate (13) enclose a sealed cavity; and the accommodation grooves (131) of the two spliced and connected sealing plates (13) form an installation hole capable of sealing and clamping the outer periphery of the oil and gas pipeline; A detector (2), installed in the detection box (1) and configured to be able to detect whether the oil and gas pipeline located in the sealed cavity leaks.

2. The oil and gas pipeline leakage detection device according to claim 1, wherein Both ends of the upper box body (11) in the width direction are provided with first installation grooves, and both ends of the lower box body (12) in the width direction are provided with second installation grooves, and the same kind of sealing plate (13) is selectively inserted and installed in the first installation groove and the second installation groove.

3. The oil and gas pipeline leakage detection device according to claim 2, characterized in that One end of the upper box body (11) in the length direction is rotatably arranged at one end of the lower box body (12) in the length direction; When the upper box body (11) is buckled on the lower box body (12), the other end of the upper box body (11) in the length direction is locked and connected to the other end of the lower box body (12) in the length direction.

4. The oil and gas pipeline leakage detection device according to claim 1, characterized in that, The upper box body (11) is further provided with a detection hole (111), a sleeve (31) is sleeved in the detection hole (111), an elastic membrane (32) is covered at the bottom end of the sleeve (31), and the outer peripheral edge of the elastic membrane (32) is clamped between the outer circumference of the sleeve (31) and the inner wall of the detection hole (111); the other end of the sleeve (31) is provided with a signal switch (33), and the signal switch (33) is configured to be able to emit a trigger signal when triggered; a push rod (34) is slidably arranged axially in the sleeve (31), one end of the push rod (34) abuts against the elastic membrane (32), and the other end of the push rod (34) abuts against the signal switch (33); The elastic membrane (32) is configured to be able to sink towards the inside of the sleeve (31) when pressed, so as to push the push rod (34) to move axially along the sleeve (31) towards the signal switch (33) and trigger the signal switch (33).

5. The oil and gas pipeline leakage detection device according to claim 1, characterized in that, The oil and gas pipeline leakage detection device further includes a storage box (4). A plurality of partition plates (43) are arranged in the storage box (4), and the plurality of partition plates (43) divide the interior of the storage box (4) into a plurality of accommodation grooves, and the various sealing plates (13) are selectively placed in the corresponding accommodation grooves.

6. The oil and gas pipeline leakage detection device according to claim 5, characterized in that, The storage box (4) includes an outer shell (41) and an inner shell (42). One end of the inner shell (42) is rotatably arranged at one end of the outer shell (41) so that the inner shell (42) has a closed position extending into the outer shell (41) and a pick-and-place position extending out of the outer shell (41); a plurality of the partition plates (43) are arranged at intervals in the inner shell (42) to form a plurality of the accommodation grooves inside the inner shell (42).

7. The oil and gas pipeline leakage detection device according to claim 1, wherein The oil and gas pipeline leakage detection device further includes a mobile platform (5) and a cleaning mechanism (6). The lower box body (12) is arranged on the mobile platform (5), and the cleaning mechanism (6) includes: a cleaning driving member (61) arranged on the lower box body (12); a cleaning support (62) slidably arranged on the mobile platform (5) along the width direction and located on one side of the detection box (1) along the width direction; the cleaning driving member (61) is in transmission connection with the cleaning support (62); a brush plate (63) installed on the cleaning support (62) to clean the outer surface of the oil and gas pipeline.

8. The oil and gas pipeline leakage detection device according to claim 7, characterized in that The cleaning support (62) includes: a first support (621) slidably arranged on the mobile platform (5) along the width direction; a second support (622) rotatably arranged at one end of the first support (621) along the length direction to buckle or open the first support (621); the first support (621) and the second support (622) are both installed with the brush plate (63). When the second support (622) buckles on the first support (621), the bristles of the two brush plates (63) surround and abut against the outer periphery of the oil and gas pipeline.

9. The oil and gas pipeline leakage detection device according to claim 1, characterized in that, The oil and gas pipeline leakage detection device further includes a mobile platform (5), a base (7) and a lifting mechanism (8). The lower box body (12) is arranged on the mobile platform (5), the base (7) is provided with the lifting mechanism (8), and the output end of the lifting mechanism (8) is supported and connected to the mobile platform (5) to drive the mobile platform (5) to move up and down along the height direction.

10. The oil and gas pipeline leakage detection device according to claim 9, characterized in that, The lifting mechanism (8) includes: a lifting driving member (81) arranged on the base (7); a worm (82) and a worm gear (83). The output end of the lifting driving member (81) is connected to the worm (82), the worm (82) is in meshing transmission with the worm gear (83), and the worm gear shaft of the worm gear (83) is threadedly connected to the mobile platform (5).

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