A self-regulating pressure type plugging device for gas pipeline emergency repair construction

Abstract

The present application relates to gas pipeline maintenance technical field, especially in a kind of self-regulating pressure formula gas pipeline repair construction and use plugging device, including two groups of symmetrical pipe sealing module, the pipe sealing module includes fixed unit, the fixed unit top is equipped with clamping plate valve, the clamping plate valve top is equipped with plugging control unit, the plugging control unit includes lower standpipe, the lower standpipe top is connected with second electric ball valve, the second electric ball valve top is connected with upper standpipe, and pipeline plugging mechanism is arranged in the upper standpipe and is lifted.Setting additional closure operation is not needed in the present application, saves the repair time, also avoids gas leakage, and in the process of descending lower plugging disc, gas in upper standpipe and lower standpipe is directly discharged into pipeline, so as to reduce the pressure regulating time, i.e.it is solved that the risk of gas leakage caused by frequent opening and closing of each valve, while saving the repair and pressure regulating time, improve the repair efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas pipeline maintenance, and particularly relates to a self-pressure-regulating plugging device for gas pipeline emergency repair construction. BACKGROUND

[0002] During long-time use of a gas pipeline, cracks and the like are likely to occur on the pipeline wall, at this time, in order to avoid safety hazards and economic losses caused by gas leakage, a plugging device needs to be arranged at both ends of the damaged pipeline, and then bridging is performed, so that pipeline maintenance or replacement is realized without affecting gas transmission.

[0003] According to the search, a patent application document named a plugging device for gas pipeline maintenance is cited, with the publication number CN118361612A and the publication date of July 19, 2024, which comprises a mounting rod, electric drive moving wheels, DD motors and drive electric boxes; one DD motor is fixedly connected to the left side and the right side of the mounting rod; the rotating part of each DD motor is fixedly connected with a drive electric box, and the drive electric box is used to provide power for the equipment; two electric drive moving wheels are fixedly connected to each drive electric box, and an electric control telescopic piece a is arranged between the electric drive moving wheel and the drive electric box; the whole equipment is moved in the pipeline by the electric drive moving wheel, and the gas transmission pipe is plugged by unfolding the plugging cover one, compared with the existing plugging mode, a large amount of manpower and material resources can be reduced, the plugging efficiency is higher, and the pipeline will not be damaged during plugging, and the gas transmission pipe is double-plugged by the plugging cover one and the plugging cover two, so that the situation of gas leakage during construction after plugging is further avoided.

[0004] The above-mentioned embodiment still has the following defects:

[0005] When the plugging is completed and the opening of the pipeline needs to be sealed, external equipment is still needed for additional sealing work, and during the sealing work, the valves need to be frequently opened and closed, which is easy to cause gas leakage, not only prolonging the working time and reducing the efficiency, but also bringing safety hazards. SUMMARY

[0006] In view of the above problems, the application provides a self-pressure-regulating plugging device for gas pipeline emergency repair construction, which comprises two groups of symmetrical pipe sealing modules, the pipe sealing module comprises a fixing unit, the fixing unit is provided with a clamping plate valve at the top, the clamping plate valve is provided with a plugging control unit at the top,

[0007] The plugging control unit comprises a lower vertical pipe, a second electric ball valve is communicated at the top of the lower vertical pipe, an upper vertical pipe is communicated at the top of the second electric ball valve, a pipeline plugging mechanism is arranged in the upper vertical pipe and is lifted and lowered, a sealing plate component is in transmission connection on one side of the pipeline plugging mechanism, a lower plugging mechanism is movably connected at the bottom of the pipeline plugging mechanism, and the lower plugging mechanism is movably clamped with the top opening of the fixed unit;

[0008] In the plugging process, the lower plugging mechanism is lowered with the pipeline plugging mechanism and the sealing plate component, and after completion, the lower plugging mechanism is separated from the pipeline plugging mechanism in the lifting process of each component and is plugged at the top opening of the fixed unit, so that the plugging time is saved and the leakage risk is reduced.

[0009] A second pressure relief valve is communicated on the side wall of the lower vertical pipe, and a temporary joint is arranged on the lower vertical pipe, and a first electric ball valve is arranged on the temporary joint.

[0010] A top pipe is arranged at the top center of the upper vertical pipe, an electric push rod is mounted on the inner wall of the top pipe, the electric push rod extends to the upper vertical pipe at the bottom, and is connected with the pipeline plugging mechanism.

[0011] The pipeline plugging mechanism comprises a lifting block, an empty cylinder is arranged at the top of the lifting block, a servo motor is arranged at the top of the empty cylinder, a rotating rod is in transmission connection on the output end of the servo motor, the rotating rod extends to the lifting block through the empty cylinder at the bottom, and a rotating disc is mounted at the bottom, a protruding block is arranged on one side wall of the rotating disc, and an inclined surface is arranged on the side wall away from the rotating disc of the protruding block.

[0012] A bottom sliding groove is formed on the inner wall of the bottom of the lifting block, a sliding block is in sliding connection in the bottom sliding groove, a reset spring is arranged on one side of the sliding block, a horizontal moving plate is mounted on the top of the sliding block, and the horizontal moving plate is in sliding fit with the inclined surface; a plurality of groups of inclined rod sliding grooves are arranged in an annular array on the outer wall of the side of the lifting block close to the sealing plate component.

[0013] The sealing plate component comprises a center sealing plate, the center sealing plate is connected with the horizontal rod, a plurality of groups of folding sealing plates which are same in number with the inclined rods are arranged in an annular array at the periphery edges of the center sealing plate, each group of the folding sealing plates is hinged with a corresponding group of the inclined rods, and each group of the folding sealing plates is hinged with the center sealing plate; a sealing strip is arranged on the side wall of each group of the folding sealing plates.

[0014] Further, the fixed unit comprises an upper pipe clamping mechanism and a lower pipe clamping mechanism, the upper pipe clamping mechanism and the lower pipe clamping mechanism are same in structure and are arranged in a vertical direction and are symmetrical to each other; the upper pipe clamping mechanism comprises a first crescent plate, two groups of extension plates are symmetrically mounted at the two ends of the first crescent plate, a fixed screw is mounted between the two groups of extension plates on the same side of the upper pipe clamping mechanism and the lower pipe clamping mechanism, and a side limiting mechanism is mounted on the fixed screw.

[0015] Further, a top opening is formed at the center of the top of the upper pipe clamping mechanism, a plurality of groups of longitudinal through grooves are arranged in an annular array on the inner wall of the top opening, a sealing interface is installed at the opening of the top of the top opening, and a plurality of groups of clamping openings that are the same in number as the longitudinal through grooves are arranged in an annular array on the bottom edge of the sealing interface, and each group of clamping openings is in communication with a corresponding group of longitudinal through grooves.

[0016] Further, the lower plugging mechanism comprises a vacuum chuck, and a lower plugging disc is movably installed at the bottom of the vacuum chuck.

[0017] Further, the bottom of the elastic block is hinged to the lower plugging disc through a torsion spring, and the top of the elastic block is movably penetrated into a corresponding group of longitudinal through grooves and clamped in a corresponding group of clamping openings.

[0018] The beneficial effects of the present application are:

[0019] 1. Since the bottom of the elastic block is hinged to the lower plugging disc, the elastic block will fold when the lower plugging mechanism is lowered, so as not to affect the lowering. When the lower plugging mechanism moves into the pipeline, the top of each group of elastic blocks is instantaneously opened under the action of the torsion spring. And during the rising process, it moves along the longitudinal through groove to the clamping opening and is clamped, so as to complete the closure of the top opening. No additional closure operation is required, which saves the repair time, avoids gas leakage, and directly discharges the gas in the upper vertical pipe and the lower vertical pipe into the pipeline during the lowering process of the lower plugging disc, thereby reducing the pressure regulating time, solving the risk of gas leakage caused by frequent opening and closing of the valves, saving the repair and pressure regulating time, and improving the repair efficiency.

[0020] 2. First, the upper pipe clamping mechanism and the lower pipe clamping mechanism are abutted on the pipeline from the upper and lower ends, and then the two groups of side limiting mechanisms are abutted on the pipeline from the two sides, so that the pipeline has a structure for fixing around. And the fixing screws of the two groups of extension plates for fixing the same side are penetrated into the vertical plates, and the vertical plates form a triangular structure with the two groups of inclined plates, which forms a stable triangular support structure between the extension plates and the pipeline, thereby improving the fixing effect of the fixing unit in the vertical and horizontal directions, and improving the defense effect against external forces.

[0021] 3. By changing the original soft sealing plate to a center sealing plate and a plurality of groups of folding sealing plates arranged in an annular array, the problem of deformation of the soft sealing plate is avoided, the service life of the sealing plate component is prolonged, and by controlling the opening amplitude of each group of folding sealing plates, the device can be suitable for any size pipeline without the need for replacement, thereby improving the compatibility of the device.

[0022] 4. By setting the lower baffle plate as a circular truncated cone structure, the gas can form a backflow in the lower baffle plate, the impact of gas pressure on the lower baffle plate is reduced, the sealing effect is ensured, and the durability of the lower baffle plate is improved.

[0023] 5. The device is divided into several independent cavities by the clamp plate valve, the second electric ball valve and the first electric ball valve, self-regulating pressure work is realized by adjusting the opening and closing, and independent pressure regulating work is realized under the premise of not affecting the pressure of other cavities by the first pressure relief valve and the second pressure relief valve.

[0024] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0026] Figure 1 A structure schematic diagram of the plugging device according to the embodiment of the present application is shown.

[0027] Figure 2 A structure schematic diagram of the pipe sealing module according to the embodiment of the present application is shown.

[0028] Figure 3 A connection schematic diagram of the clamp plate valve and the PE opening machine according to the embodiment of the present application is shown.

[0029] Figure 4 A structure schematic diagram of the fixing unit according to the embodiment of the present application is shown.

[0030] Figure 5 A bottom view schematic diagram of the top opening according to the embodiment of the present application is shown.

[0031] Figure 6 A structure schematic diagram of the side limiting mechanism according to the embodiment of the present application is shown.

[0032] Figure 7 A structure schematic diagram of the plugging control unit according to the embodiment of the present application is shown.

[0033] Figure 8 A sectional view schematic diagram of the upper stand pipe according to the embodiment of the present application is shown.

[0034] Figure 9 A cross-sectional view of a pipe plugging mechanism according to an embodiment of the present application is shown.

[0035] Figure 10 A top view of a rotating disc according to an embodiment of the present application is shown.

[0036] Figure 11 A structural view of a sealing plate component according to an embodiment of the present application is shown.

[0037] Figure 12 A structural view of a sealing plate component when opened according to an embodiment of the present application is shown.

[0038] Figure 13 A structural view of a lower plugging mechanism according to an embodiment of the present application is shown.

[0039] In the figure: 100, fixed unit; 110, first crescent plate; 120, extension plate; 130, top opening; 131, sealing interface; 132, longitudinal through slot; 133, clamping opening; 140, fixed screw; 150, side limiting mechanism; 151, vertical plate; 152, second crescent plate; 153, inclined plate; 154, through hole; 200, sealing adapter sleeve; 201, first pressure relief valve; 300, clamping valve; 400, plugging control unit; 401, second pressure relief valve; 410, lower vertical pipe; 411, temporary interface; 412, first electric ball valve; 420, second electric ball valve; 430, upper vertical pipe; 431, top pipe; 432, electric push rod; 433, bottom sliding groove; 434, sliding block; 435, return spring; 436, inclined rod sliding groove; 437, push block; 440, pipe plugging mechanism; 441, lifting block; 442, empty cylinder; 443, servo motor; 444, rotating rod; 445, rotating disc; 4451, protruding block; 4452, inclined surface; 446, transverse moving plate; 447, transverse rod; 448, inclined rod; 450, sealing plate component; 451, central sealing plate; 452, folding sealing plate; 460, lower plugging mechanism; 461, lower plugging disc; 462, elastic block; 463, vacuum chuck; 500, temporary pipe; 600, PE perforating machine. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] The embodiments of the present application provide a self-pressure-adjusting type plugging device for gas pipeline repair construction, as shown inFigure 1 、 Figure 2 and Figure 3 As shown, it includes two sets of pipe sealing modules that are symmetrically arranged with each other, and the pipe sealing modules include a fixing unit 100. The fixing unit 100 is used to fix with the pipeline.

[0042] A sealing adapter sleeve 200 is movably mounted on the top of the fixing unit 100 , and a first pressure relief valve 201 is provided on the sealing adapter sleeve 200 .

[0043] A clamping valve 300 is movably mounted on the top of the sealing adapter sleeve 200. A blocking control unit 400 is movably mounted on the top of the clamping valve 300. The cavity of the blocking control unit 400 is connected to the cavities of the fixing unit 100, the sealing adapter sleeve 200, and the clamping valve 300. The blocking control unit 400 is used to block the pipeline.

[0044] A PE hole puncher 600 is also movably mounted on the top of the sealing adapter sleeve 200. The PE hole puncher 600 is used to punch holes in the pipeline, thereby facilitating the output end of the blocking control unit 400 to extend into the pipeline.

[0045] Specifically, the blocking control units 400 of the two groups of the sealing modules are connected to each other via a temporary pipe 500. The temporary pipe 500 is used to facilitate the transportation of gas during pipeline maintenance and ensure the continuity of gas transportation.

[0046] like Figure 4 and Figure 5 As shown, the fixing unit 100 includes an upper pipe clamping mechanism and a lower pipe clamping mechanism. The upper and lower pipe clamping mechanisms have the same structure and are vertically symmetrically arranged. The upper pipe clamping mechanism includes a first crescent plate 110, with two sets of extension plates 120 symmetrically mounted at both ends of the first crescent plate 110. A fixing screw 140 is installed between the two sets of extension plates 120 located on the same side of the upper and lower pipe clamping mechanisms. A side limit mechanism 150 is mounted on the fixing screw 140.

[0047] A top opening 130 is provided at the top center of the upper clamping tube mechanism, and several groups of longitudinal through grooves 132 are distributed in a circular array on the inner wall of the top opening 130. A sealing interface 131 is installed at the top opening of the top opening 130, and several groups of bayonet holes 133 with the same number as the longitudinal through grooves 132 are distributed in a circular array at the bottom edge of the sealing interface 131, and each group of bayonet holes 133 is connected to a corresponding group of longitudinal through grooves 132.

[0048] like Figure 6As shown, the side limiting mechanism 150 includes a vertical plate 151, the vertical plate 151 is provided with a through hole 154 in the vertical direction, and the fixed screw rod 140 penetrates the through hole 154. The vertical plate 151 is provided with a second crescent plate 152 near the axis of the first crescent plate 110, and a group of inclined plates 153 are arranged at the upper and lower edges of the vertical plate 151. The other end of the two groups of inclined plates 153 extends towards the center point of the second crescent plate 152 and is installed on the second crescent plate 152. The vertical plate 151 and the two groups of inclined plates 153 form a triangular structure.

[0049] First, the upper and lower pipe clamping mechanisms are respectively abutted on the pipeline from the upper and lower ends, and then the two groups of side limiting mechanisms 150 are respectively placed in the gap between the upper and lower pipe clamping mechanisms, and the second crescent plate 152 is attached to the pipeline from the side. Then the fixed screw rod 140 penetrates the two groups of extension plates 120 and the through hole 154 on the same side, thereby completing the installation of the fixing unit 100.

[0050] First, the upper and lower pipe clamping mechanisms are respectively abutted on the pipeline from the upper and lower ends, and then the two groups of side limiting mechanisms 150 are respectively placed in the gap between the upper and lower pipe clamping mechanisms, and the second crescent plate 152 is attached to the pipeline from the side. Then the fixed screw rod 140 penetrates the two groups of extension plates 120 and the through hole 154 on the same side, thereby completing the installation of the fixing unit 100.

[0051] As shown in Figure 7 and Figure 8 As shown, the plugging control unit 400 includes a lower vertical pipe 410, the side wall of the lower vertical pipe 410 is communicated with a second pressure relief valve 401, and the lower vertical pipe 410 is provided with a temporary connection port 411, the temporary connection port 411 is provided with a first electric ball valve 412, and the two ends of the temporary pipe 500 are respectively communicated with the temporary connection ports 411 of the two groups of pipe sealing modules.

[0052] The top of the lower vertical pipe 410 is communicated with a second electric ball valve 420, the top of the second electric ball valve 420 is communicated with an upper vertical pipe 430, the top center of the upper vertical pipe 430 is provided with a top pipe 431, the inner wall of the top of the top pipe 431 is installed with an electric push rod 432, the bottom of the electric push rod 432 extends into the upper vertical pipe 430, and a pipeline plugging mechanism 440 is installed. One side of the pipeline plugging mechanism 440 is provided with a sealing plate component 450. And the bottom of the pipeline plugging mechanism 440 is provided with a lower plugging mechanism 460, and the lower plugging mechanism 460 is movably connected with the top port 130.

[0053] AsFigure 9 And Figure 10 As shown in the pipe plugging mechanism 440, the lifting block 441 is provided with an empty cylinder 442 at the top, the empty cylinder 442 is provided with a servo motor 443 at the top, the output end of the servo motor 443 is drivingly connected with a rotating rod 444, the rotating rod 444 extends to the lifting block 441 through the empty cylinder at the bottom, and the bottom is provided with a rotating disc 445, one side wall of the rotating disc 445 is provided with a protruding block 4451, and the protruding block 4451 is provided with an inclined surface 4452 away from the side wall of the rotating disc 445. A bottom sliding groove 433 is formed in the inner wall of the bottom of the lifting block 441, a sliding block 434 is slidingly connected in the bottom sliding groove 433, a reset spring 435 is arranged on one side of the sliding block 434, and a horizontal moving plate 446 is arranged on the top of the sliding block 434. The horizontal moving plate 446 is slidingly attached to the inclined surface 4452. A plurality of groups of inclined rod sliding grooves 436 are arranged in an annular array on the outer wall of the side of the lifting block 441 close to the sealing plate component 450.

[0054] A horizontal rod 447 is fixedly installed at the center of the side wall away from the rotating rod 444 in the horizontal direction, the other end of the horizontal rod 447 extends to the outside of the lifting block 441, and is installed on the sealing plate component 450. A plurality of groups of inclined rods 448 are arranged in an annular array around the horizontal rod 447, the number of which is the same as that of the inclined rod sliding grooves 436. One end of each group of the inclined rods 448 is hingedly connected to the horizontal moving plate 446 through a torsional spring, the other end of each group of the inclined rods 448 extends radially and obliquely to the outside of the lifting block 441 through the corresponding inclined rod sliding groove 436, and is installed on the sealing plate component 450.

[0055] Specifically, each group of the inclined rod sliding grooves 436 is provided with a group of push blocks 437, and each group of the inclined rods 448 is slidingly attached to the corresponding group of push blocks 437.

[0056] As shown in Figure 11 And 12 The sealing plate component 450 includes a center sealing plate 451 connected to the horizontal rod 447, a plurality of groups of folding sealing plates 452 are arranged in an annular array around the edge of the center sealing plate 451, the number of which is the same as that of the inclined rods 448, each group of the folding sealing plates 452 is hingedly connected to the corresponding group of inclined rods 448, and each group of the folding sealing plates 452 is hingedly connected to the center sealing plate 451. Each group of the folding sealing plates 452 is provided with a sealing strip on the side wall.

[0057] As shown in Figure 13As shown, the lower plugging mechanism 460 comprises a vacuum chuck 463, the bottom of which is movably mounted with a lower plugging disc 461, which is in the shape of a circular truncated cone with the top diameter smaller than the bottom diameter. A number of groups of elastic blocks 462, same as the number of the bayonets 133, are arranged in an annular array on the side wall of the lower plugging disc 461. The bottom of the elastic block 462 is hingedly connected to the lower plugging disc 461 through a torsion spring, and the top is movably penetrated into the corresponding longitudinal through slot 132 and clamped in the corresponding bayonet 133.

[0058] First, the PE perforating machine 600 is installed on the top of the clamp plate valve 300, then a through hole is formed on the top of the pipeline through the top opening 130, the clamp plate valve 300 is closed, and the plugging control unit 400 is integrally installed on the clamp plate valve 300. At this time, the clamp plate valve 300 is opened again, and the pipeline plugging mechanism 440, the sealing plate component 450 and the lower plugging mechanism 460 are integrally lowered into the pipeline by the electric push rod 432. Then the servo motor 443 is started, the rotating rod 444 and the rotating disc 445 are driven to rotate by the servo motor 443, and the sliding fit between the horizontal moving plate 446 and the inclined surface 4452 is realized, so as to horizontally push the horizontal moving plate 446 to the sealing plate component 450. While the horizontal moving plate 446 moves, each group of inclined rods 448 and each group of corresponding push blocks 437 slide and fit, so that the angle between the inclined rod 448 and the horizontal rod 447 gradually increases during the movement, so that each group of folding sealing plates 452 is uniformly opened until the edges of each group of folding sealing plates 452 fit the inner wall of the pipeline. In this way, the pipeline is plugged.

[0059] When the two groups of pipeline sealing modules are operated, the gas is transmitted through the temporary interface 411 and the temporary pipeline 500, and the damaged pipeline between the two groups of pipeline sealing modules can be directly replaced or repaired.

[0060] After replacement, the servo motor 443 is started in the opposite direction to move the center sealing plate 451 horizontally to one side of the lifting block 441, and the folding sealing plates 452 are folded again. Then the electric push rod 432 is started to drive the pipeline plugging mechanism 440, the sealing plate component 450 and the lower plugging mechanism 460 to rise.

[0061] Further, since the bottom of the elastic block 462 is hinged to the lower plug plate 461, when the lower plug mechanism 460 is lowered, the elastic block 462 will be folded, so as not to affect the lowering. When the lower plug mechanism 460 moves into the pipeline, under the action of the torsional spring, the top of each group of elastic blocks 462 will be instantaneously popped out. And during the rising process, it moves along the longitudinal through slot 132 into the clamping hole 133 and clamps, so as to complete the closure of the top hole 130. Without additional closure operation, the repair time is saved, and gas leakage is avoided. Moreover, during the lowering process of the lower plug plate 461, the gas in the upper vertical pipe 430 and the lower vertical pipe 410 is directly discharged into the pipeline, thereby reducing the pressure regulating time. And by setting the lower plug plate 461 as a circular truncated cone structure, the gas can form a backflow in the lower plug plate 461, reducing the impact of gas pressure on the lower plug plate 461, thereby ensuring the sealing effect and improving the durability of the lower plug plate 461.

[0062] By changing the original soft sealing plate to the center sealing plate 451 and the ring array distribution of several groups of folding sealing plates 452, the problem of easy deformation of the soft sealing plate is avoided, and the service life of the sealing plate component is prolonged. At the same time, by controlling the opening amplitude of each group of folding sealing plates 452, the device can be suitable for any size of pipeline without the need to replace the matching parts, thereby improving the compatibility of the device.

[0063] The above embodiment has the following beneficial effects:

[0064] 1. Since the bottom of the elastic block 462 is hinged to the lower plug plate 461, when the lower plug mechanism 460 is lowered, the elastic block 462 will be folded, so as not to affect the lowering. When the lower plug mechanism 460 moves into the pipeline, under the action of the torsional spring, the top of each group of elastic blocks 462 will be instantaneously popped out. And during the rising process, it moves along the longitudinal through slot 132 into the clamping hole 133 and clamps, so as to complete the closure of the top hole 130. Without additional closure operation, the repair time is saved, and gas leakage is avoided. Moreover, during the lowering process of the lower plug plate 461, the gas in the upper vertical pipe 430 and the lower vertical pipe 410 is directly discharged into the pipeline, thereby reducing the pressure regulating time. And by setting the lower plug plate 461 as a circular truncated cone structure, the gas can form a backflow in the lower plug plate 461, reducing the impact of gas pressure on the lower plug plate 461, thereby ensuring the sealing effect and improving the durability of the lower plug plate 461.

[0065] 2. First, the upper and lower clamping pipe mechanisms are abutted on the pipeline from the upper and lower ends, and then the two groups of side limiting mechanisms 150 are abutted on the pipeline from the two sides, so that the pipeline has a structure for fixing around. And the fixing screw 140 of the two groups of extension plates 120 for fixing the same side penetrates the vertical plate 151, and the vertical plate 151 and the two groups of inclined plates 153 form a triangular structure, which forms a stable triangular support structure between the extension plate 120 and the pipeline, thereby improving the fixing effect of the fixing unit 100 in the vertical and horizontal directions, and improving the defense effect against external force.

[0066] 3、By changing the original soft sealing plate to the center sealing plate 451 and the several groups of folding sealing plates 452 distributed in annular array, the problem of easy deformation of the soft sealing plate is avoided, and the service life of the sealing plate component is prolonged. At the same time, by controlling the opening amplitude of each group of folding sealing plates 452, the device can be applied to any size pipeline without the need to replace the matching parts, thereby improving the compatibility of the device.

[0067] 4、By setting the lower stop disc 461 to a circular truncated cone structure, the gas can form a backflow in the lower stop disc 461, reducing the impact of gas pressure on the lower stop disc 461, thereby ensuring the sealing effect and improving the durability of the lower stop disc 461.

[0068] 5、By the clamp plate valve 300, the second electric ball valve 420 and the first electric ball valve 412, the device is divided into several independent cavities, and by adjusting the opening and closing, self-regulating pressure work is realized. By the first pressure relief valve 201 and the second pressure relief valve 401, independent pressure regulating work is realized without affecting the pressure of other cavities.

[0069] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-regulating pressure type plugging device for gas pipeline repair construction, comprising two groups of symmetrical pipe sealing modules, the pipe sealing module comprises a fixing unit (100), characterized in that: The fixed unit (100) is provided with a clamping plate valve (300) on the top, and the clamping plate valve (300) is provided with a plugging control unit (400) on the top, The plugging control unit (400) comprises a lower stand pipe (410), the top of the lower stand pipe (410) is communicated with a second electric ball valve (420), the top of the second electric ball valve (420) is communicated with an upper stand pipe (430), a pipeline plugging mechanism (440) is arranged in the upper stand pipe (430) and is lifted, one side of the pipeline plugging mechanism (440) is transmissionally connected with a sealing plate component (450), and the bottom of the pipeline plugging mechanism (440) is movably connected with a lower plugging mechanism (460), the lower plugging mechanism (460) is movably clamped with the top opening of the fixed unit (100); During the plugging process, the lower plugging mechanism (460) is lowered with the pipeline plugging mechanism (440) and the sealing plate component (450), and after completion, the lower plugging mechanism (460) is separated from the pipeline plugging mechanism (440) and is plugged at the top opening of the fixed unit (100) during the lifting of each component, thereby saving the plugging time and reducing the leakage risk; The side wall of the lower stand pipe (410) is communicated with a second pressure relief valve (401), and the lower stand pipe (410) is provided with a temporary interface (411), and the temporary interface (411) is provided with a first electric ball valve (412); The top center of the upper stand pipe (430) is provided with a top pipe (431), an electric push rod (432) is installed on the inner wall of the top of the top pipe (431), the bottom of the electric push rod (432) extends into the upper stand pipe (430) and is connected with the pipeline plugging mechanism (440); The pipeline plugging mechanism (440) comprises a lifting block (441), the top of the lifting block (441) is provided with an empty cylinder (442), the top of the empty cylinder (442) is provided with a servo motor (443), the output end of the servo motor (443) is transmissionally connected with a rotating rod (444), the bottom of the rotating rod (444) extends into the lifting block (441) through the empty cylinder, and the bottom is provided with a rotating disc (445), one side wall of the rotating disc (445) is provided with a protruding block (4451), and the protruding block (4451) is provided with an inclined surface (4452) away from the side wall of the rotating disc (445); The bottom inner wall of the lifting block (441) is provided with a bottom sliding groove (433), the sliding groove (433) is slidably connected with a sliding block (434), one side of the sliding block (434) is provided with a return spring (435), the top of the sliding block (434) is provided with a transverse moving plate (446), and the transverse moving plate (446) is slidably attached to the inclined surface (4452); a plurality of groups of inclined rod sliding grooves (436) are arranged in an annular array on the side outer wall of the lifting block (441) close to the sealing plate component (450). The sealing plate component (450) comprises a center sealing plate (451) connected with the horizontal rod (447), a plurality of groups of folding sealing plates (452) in the same number as the inclined rods (448) are arranged in a ring array at the periphery edge of the center sealing plate (451), each group of the folding sealing plates (452) is hinged with a corresponding group of the inclined rods (448), and each group of the folding sealing plates (452) is hinged with the center sealing plate (451); and a sealing strip is arranged on the periphery side wall of each group of the folding sealing plates (452).

2. The self-pressure-regulating plugging device for gas pipeline repair construction according to claim 1, characterized in that: The fixing unit (100) comprises an upper pipe clamping mechanism and a lower pipe clamping mechanism, the upper pipe clamping mechanism and the lower pipe clamping mechanism are structurally identical and are arranged symmetrically in the vertical direction; the upper pipe clamping mechanism comprises a first crescent plate (110), two groups of extension plates (120) are symmetrically arranged at the two ends of the first crescent plate (110), a fixing screw rod (140) is arranged between the two groups of extension plates (120) on the same side of the upper pipe clamping mechanism and the lower pipe clamping mechanism, and a side limiting mechanism (150) is arranged on the fixing screw rod (140).

3. The self-pressure-regulating plugging device for gas pipeline repair construction according to claim 2, characterized in that: A top opening (130) is arranged at the top center of the upper pipe clamping mechanism, a plurality of groups of longitudinal through grooves (132) are arranged in a ring array on the inner wall of the top opening (130), a sealing interface (131) is arranged at the top opening of the top opening (130), a plurality of groups of clamping openings (133) in the same number as the longitudinal through grooves (132) are arranged in a ring array at the bottom edge of the sealing interface (131), and each group of the clamping openings (133) is communicated with a corresponding group of the longitudinal through grooves (132).

4. The self-pressure-regulating plugging device for gas pipeline repair construction according to claim 3, characterized in that: The lower plugging mechanism (460) comprises a vacuum suction disc (463), the lower plugging disc (461) is movably arranged at the bottom of the vacuum suction disc (463), the lower plugging disc (461) is in a circular truncated cone structure, and the top diameter is smaller than the bottom diameter; a plurality of groups of elastic blocks (462) in the same number as the clamping openings (133) are arranged in a ring array on the periphery side wall of the lower plugging disc (461).

5. The self-pressure-regulating plugging device for gas pipeline repair construction according to claim 4, characterized in that: The elastic block (462) is hinged with the lower plugging disc (461) through a torsion spring at the bottom, and is clamped in a corresponding group of clamping openings (133) after being movably penetrated into a corresponding group of longitudinal through grooves (132) at the top.

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