Natural gas pipeline leakage plugging equipment

Abstract

The present application discloses a natural gas pipeline leakage plugging device, which comprises: a supporting and fixing component, on which a sealing cover component is fixedly arranged; an auxiliary sealing structure, and a pressure buffering structure. In order to solve the problem in the prior art that, during the plugging process of ordinary natural gas pipeline plugging equipment, the pressure fluctuation inside the natural gas pipeline causes the impact on the plugging cover, resulting in a reduced effect, the present application designs an auxiliary sealing structure, and through the use of the auxiliary sealing structure in conjunction with the sealing cover component, the function of automatic auxiliary plugging is achieved when the pipeline pressure increases. The greater the pressure, the greater the plugging force, which effectively avoids the problem of reduced plugging effect due to continuous impact caused by pressure fluctuations. Furthermore, a pressure buffering structure is provided, and when the pressure is too high, a certain amount of natural gas is automatically released and collected by a gas collecting bag, thereby reducing the impact on the plugging cover.

Description

Technical Field

[0001] The present application relates to the field of natural gas pipeline plugging devices, in particular to natural gas pipeline leakage plugging equipment. Background Art

[0002] A natural gas pipeline refers to a pipeline that transports natural gas (including associated gas produced in oil fields) from the production site or processing plant to the urban gas distribution center or industrial enterprise users. It is also called a gas transmission pipeline. Natural gas pipelines are an important infrastructure that is indispensable to modern urban construction and people's lives.

[0003] The existing patent document "CN218625991U A natural gas pipeline plugger" discloses a pipeline plugger. Although the pipeline plugger in the above technical solution can plug the natural gas pipeline, when plugging, the pressure fluctuation inside the natural gas pipeline causes impact on the plugging cover, which easily causes gap leakage.

[0004] That is, the prior art has the following technical problem: when the pressure inside the natural gas pipeline fluctuates, the common pipeline plugging device is prone to gap leakage. Therefore, a natural gas pipeline leakage plugging device is proposed to solve the above problem. Summary of the invention

[0005] In this embodiment, a natural gas pipeline leakage plugging device is provided to solve the problem that ordinary pipeline pluggers in the prior art are prone to gap leakage when the internal pressure of the natural gas pipeline fluctuates.

[0006] According to one aspect of the present application, a natural gas pipeline leakage plugging device is provided, and the natural gas pipeline leakage plugging device comprises:

[0007] A support and fixing assembly, wherein a bottom bracket is fixedly arranged at the bottom end of the support and fixing assembly, and a sealing cover assembly is fixedly arranged at the bottom surface of one end of the support and fixing assembly, and the sealing cover assembly is used to be fixed at the leakage of the natural gas pipeline for sealing;

[0008] An auxiliary sealing structure, the auxiliary sealing structure is fixedly arranged on the upper surface of the sealing cover assembly, and the auxiliary sealing structure is used to automatically perform auxiliary sealing when the pressure fluctuates;

[0009] A pressure buffer structure, one end of which is fixedly arranged on the upper surface of the sealing cover assembly, and the pressure buffer structure is used for automatically buffering when the pressure increases.

[0010] Furthermore, the supporting and fixing assembly includes a rectangular fixed column, a movable frame, a guide rod, a fixed circular plate, a compression spring, a movable slider, a threaded rod and a rotating disk, a guide slot is provided at the side wall of the rectangular fixed column, the movable frame is slidably connected at the guide slot of the rectangular fixed column, an inner cavity is provided inside the rectangular fixed column, a movable slider is slidably connected in the inner cavity of the rectangular fixed column, the movable slider is fixedly connected to the movable frame, guide rods are slidably connected at both sides of the movable frame, the bottom ends of the two guide rods are fixedly connected to the sealing cover assembly, the top end of the guide rod is fixedly connected to the fixed circular plate, the bottom surface of the fixed circular plate is fixedly connected to one end of the compression spring, and the other end of the compression spring is fixedly connected to the upper surface of the movable frame.

[0011] Furthermore, a threaded rod is rotatably connected between the upper and lower walls of the inner cavity of the rectangular fixed column, the threaded rod passes through the movable slider and is threadedly engaged with the movable slider, and a rotating disk is rotatably connected to the upper end of the rectangular fixed column, and one end of the rotating disk is fixedly connected to the top end of the threaded rod.

[0012] Furthermore, a fixed shell is fixedly connected to the side wall of the rectangular fixed column, a positioning slider is slidably connected in the inner cavity of the fixed shell, one end of a locking pin is fixedly connected to one side of the positioning slider, a plurality of limiting holes are opened on the arc-shaped wall of the threaded rod, one end of the locking pin extends into the limiting hole of the threaded rod, one end of a positioning spring is fixedly connected to the other side of the positioning slider, the other end of the positioning spring is fixedly connected to the side wall of the inner cavity of the fixed shell, a moving plate is slidably connected to the bottom surface of the fixed shell, and the moving plate is fixedly connected to the positioning slider.

[0013] Furthermore, the sealing cover assembly includes a fixing plate, a sealing cover body, a fixing bracket, a protrusion and an expansion rubber bag, the fixing plate is fixedly arranged at the bottom end of the guide rod, the fixing bracket is fixedly connected to the side of the fixing plate, the sealing cover body is fixedly connected to the bottom side of the fixing bracket, the bottom side of the sealing cover body is arc-shaped, a sealing gasket is fixedly arranged on the arc surface of the bottom side of the sealing cover body, a protrusion is fixedly arranged in the inner cavity of the sealing cover body, and an expansion rubber bag is fixedly arranged on the bottom surface of the protrusion.

[0014] Furthermore, the auxiliary sealing structure includes a fixed tube, a movable plunger, a hose A, a limit spring, a push rod, a hose B, a fixed tube, a movable piston, a movable rod, a connecting plate A, a rectangular sleeve rod, a movable guide rod and a connecting tube. The fixed tube is fixedly arranged on the upper surface of the sealing cover body, one end of the hose A is fixedly connected to one side of the inner cavity of the fixed tube, the other end of the hose A extends into the inner cavity of the sealing cover body and is fixedly connected to the sealing cover body, a movable plunger is slidably connected in the inner cavity of the fixed tube, one end of the movable plunger is fixedly connected to one end of the push rod, the other end of the push rod passes through the inner cavity side wall of the fixed tube and extends outside the wall, one end of the movable plunger is fixedly connected to one end of the limit spring, the other end of the limit spring is fixedly connected to the inner cavity side wall of the fixed tube, and an output port is provided at the side wall of the fixed tube.

[0015] Furthermore, one end of the output port is fixedly connected to one end of a hose B, and the other end of the hose B is connected to the inner cavity of a fixed cylinder, and the fixed cylinder is fixedly arranged on the upper surface of a sealing cover body, and a movable piston is slidably connected in the inner cavity of the fixed cylinder, and one side of the movable piston is fixedly connected to one end of a movable rod, and the other end of the movable rod penetrates the inner cavity side wall of the fixed cylinder and extends outside the wall, and one end of the movable rod is rotatably connected to a connecting plate A, and the connecting plate A extends into the inner cavity of a rectangular sleeve rod and is slidably connected to the rectangular sleeve rod, and the rectangular sleeve rod is arranged on the upper surface of the sealing cover body and is rotatably connected to the sealing cover body, and a connecting plate B is slidably connected to the other side of the rectangular sleeve rod, and one end of the connecting plate B is rotatably connected to a movable guide rod, and the movable guide rod is arranged on the upper surface of the sealing cover body and slidably cooperates with the sealing cover body.

[0016] Furthermore, the connecting cylinder is fixedly arranged on the upper surface of the sealing cover body, and a piston is slidably connected in the inner cavity of the connecting cylinder, one end of a connecting rod is fixedly connected to one side of the piston, and the other end of the connecting rod penetrates the inner cavity side wall of the connecting cylinder and extends outside the wall, and a connecting plate is fixedly connected to one end of the connecting rod, and the connecting plate is fixedly connected to one end of the movable guide rod, the inner cavity of the connecting cylinder is filled with hydraulic oil, and one end of an output hose is fixedly connected to one side of the inner cavity of the connecting cylinder, and the other end of the output hose extends into the inner cavity of the expansion rubber bag and is fixedly connected to the expansion rubber bag.

[0017] Furthermore, the pressure buffer structure includes an output pipe, an air collecting bag, a valve body, a channel, a valve column, a port and a connecting spring. The air collecting bag is fixedly arranged at the side wall position of the supporting fixing component, and one end of the output pipe is fixedly connected to the inner cavity of the air collecting bag. The output pipe is fixedly arranged on the upper surface of the sealing cover body, and one end of the output pipe extends into the inner cavity of the sealing cover body.

[0018] Furthermore, a valve body is fixedly provided at the output pipe, a channel is provided inside the valve body, a valve column is slidably connected inside the valve body, a through opening is provided at the valve column, one end of a connecting spring is fixedly connected to the outer wall of the valve body, the other end of the connecting spring is fixedly connected to one end of the valve column, and the valve column and the push rod are in the same straight line.

[0019] Through the above-mentioned technical scheme of the present application, in order to solve the problem in the prior art that, during the sealing process of ordinary natural gas pipeline sealing equipment, the pressure fluctuation inside the natural gas pipeline causes the impact on the sealing cover, resulting in a reduced effect, the present application designs an auxiliary sealing structure. By using the auxiliary sealing structure in conjunction with the sealing cover assembly, the function of automatic auxiliary sealing is achieved when the pipeline pressure increases. The greater the pressure, the greater the sealing force, which effectively avoids the problem of reduced sealing effect due to continuous impact caused by pressure fluctuations. Furthermore, a pressure buffer structure is provided. When the pressure is too high, a certain amount of natural gas is automatically released and collected by a gas collecting bag, thereby reducing the impact on the sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0022] Figure 2 This is a structural schematic diagram of a support and fixing assembly according to an embodiment of the present application;

[0023] Figure 3 For an embodiment of the present application Figure 2 A local enlarged structural schematic diagram;

[0024] Figure 4 This is a schematic diagram of the internal structure of a support and fixing assembly according to an embodiment of the present application;

[0025] Figure 5 For an embodiment of the present application Figure 4 A local enlarged structural schematic diagram;

[0026] Figure 6 This is a structural schematic diagram of an auxiliary sealing structure according to an embodiment of the present application;

[0027] Figure 7 This is a schematic diagram of the internal structure of a fixed tube according to an embodiment of the present application;

[0028] Figure 8 A schematic top view of an auxiliary sealing structure according to an embodiment of the present application;

[0029] Fig. 9 This is a structural schematic diagram of a pressure buffer structure according to an embodiment of the present application;

[0030] Fig.10 For an embodiment of the present application Fig. 9 Schematic diagram of the structure with a partial enlargement at A.

[0031] In the figure:

[0032] Support and fixation assembly 1, rectangular fixed column 101, movable frame 102, guide rod 103, fixed circular plate 104, compression spring 105, movable slider 106, threaded rod 107, rotating disk 108, fixed shell 109, positioning slider 110, locking pin 111, movable sheet 112, positioning spring 113;

[0033] Bottom bracket 2, sealing cover assembly 3, fixing plate 301, sealing cover body 302, fixing bracket 303, protrusion 304, expansion rubber bag 305;

[0034] Auxiliary sealing structure 4, fixed tube 401, output port 4011, movable plunger 402, hose A403, limit spring 404, ejector rod 405, hose B406, fixed tube 407, movable piston 408, movable rod 409, connecting plate A410, rectangular sleeve rod 411, connecting plate B412, movable guide rod 413, connecting plate 414, connecting tube 415, piston 416, connecting rod 417, output hose 418;

[0035] Pressure buffer structure 5, output pipe 501, air collecting bag 502, valve body 503, channel 504, valve column 505, port 506, connecting spring 507;

[0036] Natural gas pipeline7. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] See also Figure 1 As shown, a natural gas pipeline leakage plugging device, the natural gas pipeline leakage plugging device comprises:

[0043] A support and fixing component 1, wherein a bottom bracket 2 is fixedly arranged at the bottom end of the support and fixing component 1, and a sealing cover component 3 is fixedly arranged at the bottom surface of one end of the support and fixing component 1, and the sealing cover component 3 is used to be fixed at the leakage of the natural gas pipeline 6 for sealing;

[0044] An auxiliary sealing structure 4, wherein the auxiliary sealing structure 4 is fixedly arranged on the upper surface of the sealing cover assembly 3, and the auxiliary sealing structure 4 is used for automatically performing auxiliary sealing when the pressure fluctuates;

[0045] The pressure buffer structure 5 has one end fixedly disposed on the upper surface of the sealing cover assembly 3, and the pressure buffer structure 5 is used for automatically buffering when the pressure increases.

[0046] Through the above technical scheme, by using the auxiliary sealing structure 4 in conjunction with the sealing cover assembly 3, the function of automatic auxiliary sealing is achieved when the pipeline pressure increases. The greater the pressure, the greater the sealing force, which effectively avoids the problem of reduced sealing effect due to continuous impact caused by pressure fluctuations. Further, a pressure buffer structure 5 is provided. When the pressure is too high, a certain amount of natural gas is automatically released and collected by the air collecting bag 502, thereby reducing the impact on the sealing cover.

[0047] For further technical solutions, see Figure 2 As shown, the support and fixing assembly 1 includes a rectangular fixed column 101, a movable frame 102, a guide rod 103, a fixed circular plate 104, a compression spring 105, a movable slider 106, a threaded rod 107 and a rotating disk 108. The side wall of the rectangular fixed column 101 is provided with a guide slot, and the movable frame 102 is slidably connected to the guide slot of the rectangular fixed column 101. The interior of the rectangular fixed column 101 is provided with an inner cavity, and the inner cavity of the rectangular fixed column 101 slides A movable slider 106 is connected, and the movable slider 106 is fixedly connected to the movable frame 102. Guide rods 103 are slidably connected to both sides of the movable frame 102. The bottom ends of the two guide rods 103 are fixedly connected to the sealing cover assembly 3. A fixed circular plate 104 is fixedly connected to the top of the guide rod 103. One end of a compression spring 105 is fixedly connected to the bottom surface of the fixed circular plate 104. The other end of the compression spring 105 is fixedly connected to the upper surface of the movable frame 102.

[0048] For specific technical solutions, please refer to Figure 3 , Figure 4 and Figure 5As shown, a threaded rod 107 is rotatably connected between the upper and lower walls of the inner cavity of the rectangular fixed column 101, and the threaded rod 107 penetrates the movable slider 106 and is threadedly matched with the movable slider 106. A rotating disk 108 is rotatably connected at the upper end of the rectangular fixed column 101, and one end of the rotating disk 108 is fixedly connected to the top of the threaded rod 107. Through this technical solution, when it is necessary to block the leakage point on the natural gas pipeline 6, the bottom bracket 2 of the device is set on the outer surface of the natural gas pipeline 6, and the sealing cover assembly 3 is set on the leakage point. At the dew point, the threaded rod 107 can be driven to rotate by rotating the rotating disk 108, so that the movable slider 106 can be driven to move by the rotation of the threaded rod 107, thereby driving the movable frame 102 to move, and the sealing cover assembly 3 is driven to move by the movement of the movable frame 102, so that the sealing cover assembly 3 is set at the leakage point, and a downward pressure is generated by stretching the compression spring 105, so that the sealing cover assembly 3 is stably pressed at the leakage point of the natural gas pipeline 6, realizing the plugging function, which is particularly suitable for short-term temporary plugging without gas outage;

[0049] A fixed shell 109 is fixedly connected to the side wall of the rectangular fixed column 101, and a positioning slider 110 is slidably connected in the inner cavity of the fixed shell 109. One end of a locking pin 111 is fixedly connected to one side of the positioning slider 110. A plurality of limiting holes are opened on the arc-shaped wall of the threaded rod 107. One end of the locking pin 111 extends into the limiting hole of the threaded rod 107. One end of a positioning spring 113 is fixedly connected to the other side of the positioning slider 110. The other end of the positioning spring 113 is fixedly connected to the inner cavity side wall of the fixed shell 109. A moving piece 112 is slidably connected to the bottom surface of the fixed shell 109, and the moving piece 112 is fixedly connected to the positioning slider 110. Through the technical solution, the threaded rod 107 can be locked and fixed by the locking pin 111, thereby avoiding loosening during blocking. When installation and adjustment are required, the moving piece 112 can be manually moved to drive the positioning slider 110 to move, thereby driving the locking pin 111 to move, so that the locking pin 111 is separated from the limiting hole of the threaded rod 107, thereby realizing the unlocking function;

[0050] The sealing cover assembly 3 includes a fixing plate 301, a sealing cover body 302, a fixing bracket 303, a protrusion 304 and an expansion rubber bag 305. The fixing plate 301 is fixedly arranged at the bottom end of the guide rod 103. The fixing bracket 303 is fixedly connected to the side of the fixing plate 301. The sealing cover body 302 is fixedly connected to the bottom side of the fixing bracket 303. The bottom side of the sealing cover body 302 is arc-shaped. A sealing gasket is fixedly arranged on the arc surface of the bottom side of the sealing cover body 302. A protrusion 304 is fixedly provided in the inner cavity of the body 302, and an expansion rubber bag 305 is fixedly provided on the bottom surface of the protrusion 304. Through the technical solution, the sealing cover body 302 is covered at the leakage point of the natural gas pipeline 6, so that the natural gas pipeline 6 can be blocked. When the natural gas pipeline 6 is covered and blocked, the expansion rubber bag 305 can be set to seal and compensate for the gap between the pipeline and the sealing cover body 302, thereby further reducing leakage.

[0051] As a preferred technical solution, please refer to Figure 6 , Figure 7 and Figure 8 As shown, the auxiliary sealing structure 4 includes a fixed tube 401, a movable plunger 402, a hose A403, a limit spring 404, a push rod 405, a hose B406, a fixed tube 407, a movable piston 408, a movable rod 409, a connecting plate A410, a rectangular sleeve rod 411, a movable guide rod 413 and a connecting tube 415. The fixed tube 401 is fixedly arranged on the upper surface of the sealing cover 302, one end of the hose A403 is fixedly connected to one side of the inner cavity of the fixed tube 401, and the other end of the hose A403 extends into the inner cavity of the sealing cover 302 and is fixedly connected to the sealing cover 302. The movable plunger 402 is slidably connected in the inner cavity of the fixed tube 401, and one end of the push rod 405 is fixedly connected to one end of the movable plunger 402. The other end of 05 penetrates the inner cavity side wall of the fixed tube 401 and extends outside the wall. One end of the movable plunger 402 is fixedly connected to one end of the limit spring 404. The other end of the limit spring 404 is fixedly connected to the inner cavity side wall of the fixed tube 401. An output port 4011 is arranged at the side wall of the fixed tube 401. Through the technical solution, when the pressure fluctuation in the inner cavity of the natural gas pipeline 6 increases, the pressure increase will also cause the gas to push the movable plunger 402 to move. As the pressure increases, the movable plunger 402 continues to move, causing the limit spring 404 to continue to contract. When the movable plunger 402 moves to the output port 4011, since the output port 4011 loses the sealing effect of the movable plunger 402, the gas can be output through the output port 4011.

[0052] One end of the output port 4011 is fixedly connected to one end of a hose B406, and the other end of the hose B406 is connected to the inner cavity of a fixed cylinder 407. The fixed cylinder 407 is fixedly arranged on the upper surface of the sealing cover body 302. A movable piston 408 is slidably connected in the inner cavity of the fixed cylinder 407. One side of the movable piston 408 is fixedly connected to one end of a movable rod 409. The other end of the movable rod 409 penetrates the inner cavity side wall of the fixed cylinder 407 and extends outside the wall. A connecting plate A410 is rotatably connected to one end of the movable rod 409. The connecting plate A410 extends into the inner cavity of a rectangular sleeve rod 411 and is slidably connected to the rectangular sleeve rod 411. The rectangular sleeve rod 411 is arranged on the upper surface of the sealing cover body 302 and is slidably connected to the sealing cover body 302. The other side of the rectangular sleeve rod 411 is slidably connected with a connecting plate B412, and one end of the connecting plate B412 is rotatably connected with a moving guide rod 413, and the moving guide rod 413 is arranged on the upper surface of the sealing cover body 302 and slides with the sealing cover body 302. Through the technical solution, when the pressure increases, the gas is output through the limit spring 404, and then enters the inner cavity of the fixed cylinder 407 through the hose B406, thereby pushing the moving piston 408 to move. The movement of the moving piston 408 can drive the moving rod 409 to move, thereby driving the connecting plate A410 to rotate angularly, and then driving the connecting plate B412 to rotate, thereby pulling the moving guide rod 413 to move, and realizing the traction and movement function of the moving guide rod 413;

[0053] The connecting cylinder 415 is fixedly arranged on the upper surface of the sealing cover body 302, and a piston 416 is slidably connected in the inner cavity of the connecting cylinder 415, and one end of a connecting rod 417 is fixedly connected to one side of the piston 416, and the other end of the connecting rod 417 penetrates the inner cavity side wall of the connecting cylinder 415 and extends outside the wall, and a connecting plate 414 is fixedly connected to one end of the connecting rod 417, and the connecting plate 414 is fixedly connected to one end of the movable guide rod 413. The inner cavity of the connecting cylinder 415 is filled with hydraulic oil, and one end of an output hose 418 is fixedly connected to one side of the inner cavity of the connecting cylinder 415, and the other end of the output hose 418 extends into the inner cavity of the expansion rubber bag 305 and is fixedly connected to the expansion rubber bag 305. According to the technical solution, the movement of the movable guide rod 413 can drive the connecting cylinder 415 to move. The plate 414 moves, thereby driving the connecting rod 417 to move, and then pushing the piston 416 to move, so that the movement of the piston 416 can push the hydraulic oil in the inner cavity of the connecting cylinder 415 into the inner cavity of the expansion rubber bag 305, so that the expansion rubber bag 305 continues to expand, and further expands and seals the gap. Through the setting of the auxiliary sealing structure 4, when the pressure is greater, the moving piston 408 is pushed to move a longer distance, thereby driving the connecting rod 417 to move a longer distance, so that more hydraulic oil enters the inner cavity of the expansion rubber bag 305, so that the expansion rubber bag 305 is further expanded and sealed. It can be seen from the above description that the greater the pressure of the natural gas pipeline 6, the greater the sealing force, which effectively avoids the problem of reduced sealing effect due to continuous impact caused by pressure fluctuations.

[0054] For further technical solutions, see Fig. 9 ,and Fig.10 As shown, the pressure buffer structure 5 includes an output pipe 501, an air collecting bag 502, a valve body 503, a channel 504, a valve column 505, a through port 506 and a connecting spring 507. The air collecting bag 502 is fixedly arranged at the side wall position of the support fixing component 1, and one end of the output pipe 501 is fixedly connected to the inner cavity of the air collecting bag 502. The output pipe 501 is fixedly arranged on the upper surface of the sealing cover body 302, and one end of the output pipe 501 extends into the inner cavity of the sealing cover body 302.

[0055] The output pipe 501 is fixedly provided with a valve body 503, the interior of the valve body 503 is provided with a channel 504, the interior of the valve body 503 is slidably connected with a valve column 505, the valve column 505 is provided with a through port 506, the outer wall of the valve body 503 is fixedly connected with one end of a connecting spring 507, the other end of the connecting spring 507 is fixedly connected to one end of the valve column 505, the valve column 505 and the push rod 405 are in the same straight line, through the technical solution, when the pressure of the natural gas pipeline 6 increases, the increase in pressure will push the moving plunger 402 to move, thereby driving the push rod 405 to move, and as the push rod 405 continues to move, one end of the push rod 405 can contact and push The movable valve column 505 moves, and the movement of the valve column 505 can drive the port 506 to move, so that the port 506 coincides with the channel 504, so that the valve body 503 is in a conducting state, and then the gas in the inner cavity of the sealing cover body 302 can enter the inner cavity of the air collecting bag 502 through the output pipe 501 under high pressure, thereby releasing a certain amount of gas inside the sealing cover body 302, achieving a certain buffering compensation effect, thereby reducing the impact on the blocking cover. It can be seen from the above description that through the setting of the pressure buffer structure 5, a certain amount of natural gas can be automatically released when the pressure increases, and collected by the air collecting bag 502, thereby reducing the impact on the sealing cover body 302.

[0056] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Natural gas pipeline leakage plugging equipment, characterized by: The natural gas pipeline leakage plugging equipment comprises: A support and fixing assembly (1), wherein a bottom bracket (2) is fixedly arranged at the bottom end of the support and fixing assembly (1), and a sealing cover assembly (3) is fixedly arranged at the support and fixing assembly (1), and the sealing cover assembly (3) is used to be fixed at a leaking part of a natural gas pipeline (6) for sealing; An auxiliary sealing structure (4), the auxiliary sealing structure (4) being fixedly arranged on the sealing cover assembly (3), and the auxiliary sealing structure (4) being used for automatically performing auxiliary sealing when pressure fluctuates; A pressure buffer structure (5), the pressure buffer structure (5) being fixedly arranged on the sealing cover assembly (3), and the pressure buffer structure (5) being used for automatically buffering when pressure increases; The sealing cover assembly (3) comprises a fixing plate (301), a sealing cover body (302), a fixing bracket (303), a protrusion (304) and an expansion rubber bag (305); the fixing plate (301) is fixedly arranged at the bottom end of the guide rod (103); the fixing bracket (303) is fixedly connected to the side of the fixing plate (301); the sealing cover body (302) is fixedly connected to the bottom side of the fixing bracket (303); the bottom side of the sealing cover body (302) is arc-shaped; a sealing gasket is fixedly arranged on the arc surface of the bottom side of the sealing cover body (302); the protrusion (304) is fixedly arranged in the inner cavity of the sealing cover body (302); and the expansion rubber bag (305) is fixedly arranged on the bottom surface of the protrusion (304); The auxiliary sealing structure (4) comprises a fixed tube (401), a movable plunger (402), a hose A (403), a limit spring (404), a push rod (405), a hose B (406), a fixed tube (407), a movable piston (408), a movable rod (409), a connecting plate A (410), a rectangular sleeve rod (411), a movable guide rod (413) and a connecting tube (415), wherein the fixed tube (401) is fixedly arranged on the upper surface of the sealing cover body (302), one end of the hose A (403) is fixedly connected to one side of the inner cavity of the fixed tube (401), and the other end of the hose A (403) extends to the sealing cover body (302). The fixed tube (401) is in the inner cavity of the fixed tube (302) and is fixedly connected to the sealing cover body (302); a movable plunger (402) is slidably connected to the inner cavity of the fixed tube (401); one end of the movable plunger (402) is fixedly connected to one end of a push rod (405); the other end of the push rod (405) penetrates the inner cavity side wall of the fixed tube (401) and extends outside the wall; one end of the movable plunger (402) is fixedly connected to one end of a limit spring (404); the other end of the limit spring (404) is fixedly connected to the inner cavity side wall of the fixed tube (401); and an output port (4011) is provided on the side wall of the fixed tube (401).

2. The natural gas pipeline leakage plugging device according to claim 1 is characterized in that: The supporting and fixing assembly (1) comprises a rectangular fixed column (101), a movable frame (102), a guide rod (103), a fixed circular plate (104), a compression spring (105), a movable slider (106), a threaded rod (107) and a rotating disk (108); a guide slot is provided on the side wall of the rectangular fixed column (101); the movable frame (102) is slidably connected to the guide slot of the rectangular fixed column (101); an inner cavity is provided inside the rectangular fixed column (101); a movable frame (102) is slidably connected to the movable frame (102) in the inner cavity of the rectangular fixed column (101); A movable slider (106) is connected, the movable slider (106) is fixedly connected to the movable frame (102), guide rods (103) are slidably connected to both sides of the movable frame (102), the bottom ends of the two guide rods (103) are fixedly connected to the sealing cover assembly (3), the top ends of the guide rods (103) are fixedly connected to a fixed circular plate (104), the bottom surface of the fixed circular plate (104) is fixedly connected to one end of a compression spring (105), and the other end of the compression spring (105) is fixedly connected to the upper surface of the movable frame (102).

3. The natural gas pipeline leakage plugging device according to claim 2 is characterized in that: A threaded rod (107) is rotatably connected between the upper and lower walls of the inner cavity of the rectangular fixed column (101); the threaded rod (107) passes through the movable slider (106) and is threadably engaged with the movable slider (106); a rotating disk (108) is rotatably connected to the upper end of the rectangular fixed column (101); one end of the rotating disk (108) is fixedly connected to the top end of the threaded rod (107).

4. The natural gas pipeline leakage plugging device according to claim 2 is characterized in that: A fixed shell (109) is fixedly connected to the side wall of the rectangular fixed column (101), a positioning slider (110) is slidably connected in the inner cavity of the fixed shell (109), one end of a locking pin (111) is fixedly connected to one side of the positioning slider (110), a plurality of limiting holes are provided on the arc-shaped wall of the threaded rod (107), one end of the locking pin (111) extends into the limiting hole of the threaded rod (107), one end of a positioning spring (113) is fixedly connected to the other side of the positioning slider (110), the other end of the positioning spring (113) is fixedly connected to the side wall of the inner cavity of the fixed shell (109), a moving sheet (112) is slidably connected to the bottom surface of the fixed shell (109), and the moving sheet (112) is fixedly connected to the positioning slider (110).

5. The natural gas pipeline leakage plugging device according to claim 1 is characterized in that: One end of the output port (4011) is fixedly connected to one end of a hose B (406), and the other end of the hose B (406) is connected to the inner cavity of a fixed cylinder (407). The fixed cylinder (407) is fixedly arranged on the upper surface of the sealing cover (302). A movable piston (408) is slidably connected to the inner cavity of the fixed cylinder (407). One side of the movable piston (408) is fixedly connected to one end of a movable rod (409). The other end of the movable rod (409) penetrates the inner cavity side wall of the fixed cylinder (407) and extends outside the wall. One end of the movable rod (409) is rotatably connected to A connecting plate A (410), the connecting plate A (410) extending into the inner cavity of the rectangular sleeve rod (411) and being slidably connected to the rectangular sleeve rod (411), the rectangular sleeve rod (411) being arranged on the upper surface of the sealing cover body (302) and being rotatably connected to the sealing cover body (302), a connecting plate B (412) being slidably connected to the other side of the rectangular sleeve rod (411), a movable guide rod (413) being rotatably connected to one end of the connecting plate B (412), the movable guide rod (413) being arranged on the upper surface of the sealing cover body (302) and being slidably matched to the sealing cover body (302).

6. The natural gas pipeline leakage plugging device according to claim 1 is characterized by: The connecting cylinder (415) is fixedly arranged on the upper surface of the supporting and fixing assembly (1); a piston (416) is slidably connected in the inner cavity of the connecting cylinder (415); one end of a connecting rod (417) is fixedly connected to one side of the piston (416); the other end of the connecting rod (417) penetrates the inner cavity side wall of the connecting cylinder (415) and extends outside the wall; one end of the connecting rod (417) is fixedly connected to a connecting plate (414); the connecting plate (414) is fixedly connected to one end of a movable guide rod (413); the inner cavity of the connecting cylinder (415) is filled with hydraulic oil; one end of an output hose (418) is fixedly connected to one side of the inner cavity of the connecting cylinder (415); the other end of the output hose (418) extends into the inner cavity of the expansion rubber bag (305) and is fixedly connected to the expansion rubber bag (305).

7. The natural gas pipeline leakage plugging device according to claim 1 is characterized in that: The pressure buffer structure (5) comprises an output tube (501), an air collecting bag (502), a valve body (503), a channel (504), a valve column (505), a through port (506) and a connecting spring (507); the air collecting bag (502) is fixedly arranged at a side wall position of the supporting and fixing component (1); one end of the output tube (501) is fixedly connected to the inner cavity of the air collecting bag (502); the output tube (501) is fixedly arranged on the upper surface of the sealing cover body (302); and one end of the output tube (501) extends into the inner cavity of the sealing cover body (302).

8. The natural gas pipeline leakage plugging device according to claim 7 is characterized in that: A valve body (503) is fixedly arranged at the output pipe (501), a passage (504) is arranged inside the valve body (503), a valve column (505) is slidably connected inside the valve body (503), a through hole (506) is arranged at the valve column (505), one end of a connecting spring (507) is fixedly connected to the outer wall of the valve body (503), the other end of the connecting spring (507) is fixedly connected to one end of the valve column (505), and the valve column (505) and the push rod (405) are on the same straight line.

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