A pressure plugging device and plugging method for gas leakage in a pipe gallery

Abstract

The present invention relates to the technical field of gas leakage plugging in pipe gallery, and specifically to a pressure plugging device and a plugging method for gas leakage in pipe gallery, including an attached plugging component and a supporting and fixing component, the attached plugging component including a rectangular seat, a plugging block, an injection mechanism and an elastic pressure mechanism, a flexible fitting is provided on one side of the rectangular seat, a strip groove and a receiving groove are respectively provided on both sides of the plugging block, a through opening is provided on one of the peripheral walls of the plugging block, the elastic pressure mechanism includes a plugging slide and an elastic pressure strip, and the supporting and fixing component includes two groups of telescopic support frames for pressing the rectangular seat against the inner wall of the pipe gallery. When the filling agent in the strip groove increases, the plugging slide slides out, the elastic pressure strip is pressed down, and finally the filling agent is pressed toward the crack through the elastic pressure strip, and the filling agent can overcome the air pressure and be applied to the crack through the elastic pressure strip.

Description

Technical Field

[0001] The present invention relates to the technical field of gas leakage plugging in a pipe gallery, and in particular to a pressure plugging device and a plugging method for gas leakage in a pipe gallery. Background Art

[0002] A pipe gallery is a steel or reinforced concrete structure used to support pipes laid above or below the ground. In chemical and related factories, many pipes are concentrated together and arranged along the outside of the device or factory building, forming a corridor-like appearance. In addition, the urban underground integrated pipe gallery is also an important form of pipe gallery, which concentrates municipal public pipelines such as electricity, communications, and water supply in one structure. The pipe gallery is generally composed of columns, beams, and trusses of steel or reinforced concrete structures, and is designed in the shape of an "open". According to different needs, the pipe gallery can be divided into single-layer or multi-layer, passable or impassable, above ground or underground. The existing Chinese patent with publication number CN113944196A discloses a pressure plugging device and a plugging method for underwater pipe gallery gas leakage, but its patent and traditional technology also have the following defects:

[0003] First, the best way to seal cracks is to use fillers. Ordinary patches or plates will reduce their sealing properties due to corrosion after long-term use, which will eventually lead to sealing failure and require secondary sealing.

[0004] Secondly, the blocking block in the above patent is fixedly connected to the inner wall of the pipe gallery by bolts. When drilling and installing the bolts, it is inevitable to damage the pipe gallery, which eventually causes the original cracks to gradually expand;

[0005] Thirdly, the above patent adopts hydraulic drive to fix the blocking block, that is, a jack is used to press the blocking block against the inner wall of the pipe gallery. Since the driving force of the jack is large, if the stroke is not well controlled, secondary damage will be caused to the inner wall of the pipe gallery. Therefore, it is necessary to provide a pressure blocking device and a blocking method for gas leakage in a pipe gallery to address the above problems. Summary of the invention

[0006] Based on this, it is necessary to provide a pressure-sealing device and a sealing method for gas leakage in a pipeline gallery in response to the existing technical problems.

[0007] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: a pressure-sealing device for gas leakage in a pipe gallery, comprising an attached sealing component and a supporting and fixing component, the attached sealing component comprising a rectangular seat, a sealing block, an injection mechanism and an elastic pressure mechanism, a flexible fitting part is provided on one side of the rectangular seat, the sealing block is strip-shaped, the sealing block is fixed on the side of the rectangular seat provided with the flexible fitting part, a strip groove and a receiving groove are respectively provided on both sides of the sealing block, the strip groove faces the flexible fitting part, the receiving groove is connected with the strip groove, a through opening connected with the strip groove is provided on one of the peripheral walls of the sealing block, the injection mechanism is provided on the sealing The sealing block is on the wall, and the injection mechanism is located on the opposite side of the opening. The injection mechanism is used to inject liquid filling agent into the strip groove. The elastic pressure mechanism is arranged on the sealing block. The elastic pressure mechanism includes a sealing slide and an elastic pressure strip. The sealing slide slides in the strip groove, and the elastic pressure strip is arranged in the accommodating groove. The elastic pressure strip is parallel to the sealing slide, and the length of the elastic pressure strip is less than the length of the sealing slide. The elastic pressure strip is elastically connected to the sealing block, and the elastic pressure strip is pressed on the sealing slide. The supporting and fixing component is arranged on the side of the rectangular seat away from the flexible fitting, and the supporting and fixing component includes two sets of telescopic support frames for pressing the rectangular seat against the inner wall of the pipe gallery.

[0008] Furthermore, a rectangular sleeve located beside the through opening is fixedly provided on one side of the rectangular seat, a rubber sleeve is embedded in the rectangular sleeve, and one end of the blocking slide passes through the through opening and then out of the rubber sleeve.

[0009] Furthermore, a plurality of limit shafts are formed on the side of the elastic strip facing away from the blocking slide bar, and the limit shafts are evenly distributed along the length direction of the elastic strip. An avoidance groove for the plurality of limit shafts to pass through is opened on the rectangular seat. Each limit shaft is perpendicular to the elastic strip. A fixed plate and a plurality of limit plates are fixed on the side of the blocking block close to the accommodating groove. The fixed plate is parallel to the blocking block. Each limit shaft passes through the fixed plate. A spring is sleeved on each limit shaft. The two ends of the spring respectively conflict with the fixed plate and the elastic strip. A limit nut is screwed on the end of each limit shaft.

[0010] Furthermore, the injection mechanism includes an injection tube and a push rod. An injection port connected to the strip groove is formed on the side of the sealing block away from the through opening. One end of the injection tube is fixed on the injection port. The push rod is inserted into the injection tube through the other end of the injection tube. The inner diameter of the injection port is consistent with the inner diameter of the injection tube, and the outer diameter of the push rod is consistent with the inner diameter of the injection tube.

[0011] Furthermore, two groups of telescopic support frames are distributed vertically up and down, and each group of telescopic support frames includes two telescopic rods distributed horizontally left and right, and each telescopic rod includes a No. 1 threaded rod, a rotating sleeve, a No. 2 threaded rod, a universal connector and a contact plate. The No. 1 threaded rod and the No. 2 threaded rod are respectively coaxially rotated in the two ends of the rotating sleeve, and the end of the No. 1 threaded rod away from the rotating sleeve is hinged on the side wall of the rectangular seat. The contact plate is connected to the end of the No. 2 threaded rod away from the rotating sleeve through the universal connector, and the two adjacent No. 1 threaded rods on the left and right are connected by a horizontal connecting rod.

[0012] Furthermore, the flexible fitting comprises four groups of rubber pads distributed in a rectangular shape on four end corners of the rectangular seat, and each rubber pad is fixedly connected to the side wall of the rectangular seat.

[0013] Furthermore, a rubber ring surrounding the strip groove is fixedly provided on one side of the sealing block close to the rubber pad.

[0014] A method for blocking gas leakage in a pipe gallery, the method comprising the following steps:

[0015] S1, after attaching the rectangular block vertically to the crack, fix the rectangular block by two sets of telescopic support frames;

[0016] S2, injecting the liquid filling agent into the injection tube, and then pressing the push rod;

[0017] S3, after the elastic layer is pressed down, the injection of the liquid filling agent is stopped, and then a period of time is waited for the liquid filling agent to dry;

[0018] S4, when the liquid filling agent is dry, the rectangular block is removed from the inner wall of the pipe gallery.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Firstly, the device uses a filler to fill the cracks, and in the process of applying the filler to the cracks, the filler is injected into the strip groove from the side. Since the strip groove covers the cracks, when the filler enters the strip groove, the blown filler will not fly out;

[0021] Secondly, when the filling agent in the strip groove increases, the blocking strip slides out, and the elastic strip presses down, and finally the filling agent is pressed toward the crack through the elastic strip, so that the filling agent can overcome the air pressure and be spread toward the crack through the elastic strip;

[0022] Thirdly, the device fixes the rectangular seat by a telescopic support frame, and the telescopic support frame is manually controlled to prevent the rectangular block from being strongly pressed on the inner wall of the pipe gallery, thereby eventually causing secondary damage to the pipe gallery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1is a schematic diagram of the three-dimensional structure of an embodiment;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of a rectangular seat;

[0025] Figure 3 It is the plan view of a rectangular seat;

[0026] Figure 4 yes Figure 3 Section view along line AA;

[0027] Figure 5 yes Figure 4 A1 is a partial enlarged schematic diagram;

[0028] Figure 6 yes Figure 4 A2 is a partial enlarged schematic diagram;

[0029] Figure 7 It is a three-dimensional structural exploded diagram of the rectangular seat and the blocking block;

[0030] Figure 8 It is a three-dimensional structural schematic diagram of the telescopic support frame;

[0031] Fig. 9 It is a plan view of the telescopic support frame when the rectangular seat is fixed.

[0032] The numbers in the figure are: 1. Attached sealing component; 2. Support and fixing component; 3. Rectangular seat; 4. Sealing block; 5. Strip groove; 6. Accommodating groove; 7. Through port; 8. Sealing slide; 9. Elastic pressure strip; 10. Telescopic support frame; 11. Rectangular sleeve; 12. Rubber sleeve; 13. Limiting shaft; 14. Avoidance groove; 15. Fixed plate; 16. Limiting plate; 17. Spring; 18. Limiting nut; 19. Injection tube; 20. Push rod; 21. Injection port; 22. Telescopic rod; 23. No. 1 threaded rod; 24. Rotating sleeve; 25. No. 2 threaded rod; 26. Resistance plate; 27. Universal connector; 28. Horizontal connecting rod; 29. ​​Rubber pad; 30. Rubber ring. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] refer to Figures 1 to 9The illustrated embodiment of a pressure plugging device for gas leakage in a pipe gallery comprises an attached plugging component 1 and a supporting and fixing component 2. The attached plugging component 1 comprises a rectangular seat 3, a plugging block 4, an injection mechanism and an elastic pressure mechanism. A flexible adhesive member is provided on one side of the rectangular seat 3. The plugging block 4 is strip-shaped. The plugging block 4 is fixed on the side of the rectangular seat 3 provided with the flexible adhesive member. A strip groove 5 and a receiving groove 6 are respectively provided on both sides of the plugging block 4 (combined with the Figure 4 and Figure 6 ), the strip groove 5 faces the flexible fitting, the receiving groove 6 is connected with the strip groove 5, a through hole 7 connected with the strip groove 5 is opened on one of the peripheral walls of the blocking block 4, the injection mechanism is arranged on the blocking block 4, and the injection mechanism is located on the opposite side of the through hole 7, the injection mechanism is used to inject liquid filling agent into the strip groove 5, the elastic pressing mechanism is arranged on the blocking block 4, the elastic pressing mechanism includes a blocking slide 8 and an elastic pressure strip 9, the blocking slide 8 slides in the strip groove 5, the elastic pressure strip 9 is arranged in the receiving groove 6, the elastic pressure strip 9 is parallel to the blocking slide 8, the length of the elastic pressure strip 9 is less than the length of the blocking slide 8, the elastic pressure strip 9 is elastically connected to the blocking block 4, and the elastic pressure strip 9 is pressed on the blocking slide 8, the support and fixing component 2 is arranged on the side of the rectangular seat 3 away from the flexible fitting, and the support and fixing component 2 includes two groups of telescopic support frames 10 for pressing the rectangular seat 3 against the inner wall of the pipe gallery.

[0035] The present device is used to seal cracks generated on the inner wall of the pipe gallery. Since the pipe gallery has multiple inner walls, cracks appear on the vertical inner wall of the pipe gallery by default. The specific sealing process is as follows: the rectangular seat 3 is vertically attached to the crack. At this time, the sealing slide 8 located in the strip groove 5 will cover the crack. Then, the rectangular seat 3 is pressed against the inner wall of the pipe gallery by extending the two sets of telescopic support frames 10. When the position of the rectangular seat 3 is fixed, the operator injects liquid filling agent into the strip groove 5 through the injection mechanism. When the liquid filling agent is injected into the strip groove 5, the sealing slide 8 will be driven to slide in the strip groove 5 due to the hydraulic pressure. Then, as the sealing slide 8 slides, the crack blocked by the sealing slide 8 will gradually be exposed in the strip groove 5. When the crack is exposed, liquid is sprayed from the crack. The gas released will bring the liquid filling agent in the strip groove 5 to the elastic pressure strip 9. When the sealing slide bar 8 slides to separate from the elastic pressure strip 9, the elastic pressure strip 9 will lose the resistance with the sealing slide bar 8 and immediately press toward the crack. Then, the liquid filling agent in the strip groove 5 will be pressed toward the crack by the elastic pressure strip 9. In this way, the liquid filling agent can overcome the air pressure in the crack and be spread on the crack through the elastic pressure strip 9. When the operator observes the displacement of the elastic pressure strip 9, he stops injecting the liquid filling agent into the strip groove 5 and then waits for a while. When the liquid filling agent solidifies, the telescopic support frame 10 can be retracted to remove the rectangular seat 3 from the inner wall of the pipe gallery. A release agent is applied in advance in the strip groove 5, so that when the liquid filling agent solidifies, the liquid filling agent will not adhere to the strip groove 5.

[0036] In order to ensure that the blocking slide bar 8 can only slide along its length direction, the following features are provided:

[0037] A rectangular sleeve 11 located beside the through opening 7 is fixedly provided on one side of the rectangular seat 3 , a rubber sleeve 12 is embedded in the rectangular sleeve 11 , and one end of the blocking slide bar 8 passes through the through opening 7 and then out of the rubber sleeve 12 .

[0038] The rectangular sleeve 11 is used to ensure that the blocking slide bar 8 can only slide along its length direction. The rubber sleeve 12 embedded in the rectangular sleeve 11 is used to increase the friction between the blocking slide bar 8 and the rectangular sleeve 11, so as to prevent the blocking slide bar 8 from sliding down due to its own weight when the operator places the rectangular seat 3 vertically. When the liquid filling agent is injected into the strip groove 5, the hydraulic pressure will be much greater than the friction between the blocking slide bar 8 and the rubber sleeve 12, and finally the blocking slide bar 8 will still be driven by the hydraulic pressure to slide.

[0039] In order to show how the elastic pressure strip 9 is elastically connected to the blocking block 4, the following features are set:

[0040] A plurality of limit shafts 13 are formed on the side of the elastic strip 9 away from the blocking slide 8 and are equidistantly distributed along the length direction of the elastic strip 9. An avoidance groove 14 is provided on the rectangular seat 3 for the plurality of limit shafts 13 to pass through. Each limit shaft 13 is perpendicular to the elastic strip 9. A fixing plate 15 and a plurality of limit plates 16 are fixed on the side of the blocking block 4 close to the accommodating groove 6. The fixing plate 15 is parallel to the blocking block 4. Each limit shaft 13 passes through the fixing plate 15. A spring 17 is sleeved on each limit shaft 13. The two ends of the spring 17 respectively conflict with the fixing plate 15 and the elastic strip 9. A limit nut 18 is screwed onto the end of each limit shaft 13.

[0041] When the blocking slide 8 is not inserted into the strip groove 5, each spring 17 will drive the elastic pressure strip 9 to penetrate into the strip groove 5 through elastic force. At this time, the downward pressure stroke of the elastic pressure strip 9 is limited by the limit nut 18. When the blocking slide 8 is inserted into the strip groove 5, the elastic pressure strip 9 is manually pressed, and the elastic pressure strip 9 will synchronously compress several springs 17. When the elastic pressure strip 9 is pressed back from the strip groove 5 to the receiving groove 6, the blocking slide 8 is inserted. Finally, the blocking slide 8 is used to limit the downward pressure of the elastic pressure strip 9. Several limit plates 16 are used to prevent the elastic pressure strip 9 from passing through the receiving groove 6 when it is pressed back from the strip groove 5 to the receiving groove 6.

[0042] In order to show the specific structure of the injection mechanism, the following features are set:

[0043] The injection mechanism includes an injection tube 19 and a push rod 20. An injection port 21 connected to the strip groove 5 is formed on the side of the sealing block 4 away from the through port 7. One end of the injection tube 19 is fixed on the injection port 21. The push rod 20 is inserted into the injection tube 19 through the other end of the injection tube 19. The inner diameter of the injection port 21 is consistent with the inner diameter of the injection tube 19, and the outer diameter of the push rod 20 is consistent with the inner diameter of the injection tube 19.

[0044] Before injecting the liquid filling agent into the strip groove 5, the filling tube 19 is first fixed on the filling port 21, and then the liquid filling agent is injected into the filling tube 19, and finally the push rod 20 is inserted into the filling tube 19. Thereafter, the push rod 20 is pressed to press the liquid filling agent in the filling tube 19 into the strip groove 5 through the filling port 21. When the liquid filling agent enters the strip groove 5, the blocking slide bar 8 is driven to move, and finally the elastic pressure strip 9 is ejected from the receiving groove 6 into the strip groove 5. When the elastic pressure strip 9 bounces into the strip groove 5, the elastic pressure strip 9 will cut off the connection channel between the injection port 21 and the strip groove 5, so that when the liquid filler dries, only the injection port 21 and the injection tube 19 will form a solidified body. Since the inner diameter of the injection port 21 is consistent with the inner diameter of the injection tube 19, the outer diameter of the push rod 20 is consistent with the inner diameter of the injection tube 19, after the rectangular seat 3 is removed, the solidified body in the injection port 21 and the injection tube 19 can be pushed out by the push rod 20.

[0045] In order to show the specific structure of the telescopic support frame 10, the following features are set:

[0046] The two groups of telescopic support frames 10 are distributed up and down in the vertical direction, and each group of telescopic support frames 10 includes two telescopic rods 22 distributed left and right in the horizontal direction. Each telescopic rod 22 includes a No. 1 threaded rod 23, a rotating sleeve 24, a No. 2 threaded rod 25, a universal connector 27 and a contact plate 26. The No. 1 threaded rod 23 and the No. 2 threaded rod 25 are respectively coaxially rotated in the two ends of the rotating sleeve 24, and the end of the No. 1 threaded rod 23 away from the rotating sleeve 24 is hinged on the side wall of the rectangular seat 3. The contact plate 26 is connected to the end of the No. 2 threaded rod 25 away from the rotating sleeve 24 through the universal connector 27, and the two adjacent No. 1 threaded rods 23 on the left and right are connected by a horizontal connecting rod 28.

[0047] The entire telescopic support frame 10 is driven to rotate by the No. 1 threaded rod 23 hinged to the rectangular seat 3. When the rectangular seat 3 is fixed, the telescopic support frame 10 located above is rotated to the horizontal, and then the sleeve 24 and the No. 2 threaded rod 25 are rotated to make the contact plate 26 contact the inner wall of the pipe gallery. Then, the telescopic support frame 10 located below is rotated to be inclined, and then the sleeve 24 and the No. 2 threaded rod 25 are rotated again to make the corresponding contact plate 26 contact the inner wall of the pipe gallery. Finally, Fig. 9 As shown, the two sets of telescopic support frames 10 will form a triangle shape with the inner wall of the pipe gallery, thereby improving the stability of the rectangular seat 3.

[0048] In order to show the specific structure of the flexible fitting, the following features are set:

[0049] The flexible fitting comprises four groups of rubber pads 29 distributed in a rectangular shape on four end corners of the rectangular seat 3 , and each rubber pad 29 is fixedly connected to the side wall of the rectangular seat 3 .

[0050] When the rectangular seat 3 is attached to the inner wall of the pipe gallery, the rubber pad 29 is used to prevent the rectangular seat 3 from having a hard contact with the inner wall of the pipe gallery.

[0051] In order to prevent the gas produced by the cracks from flowing out from the gap between the inner wall of the pipe gallery and the blocking block 4, the following features are set:

[0052] A rubber ring 30 surrounding the strip groove 5 is fixedly provided on one side of the blocking block 4 close to the rubber pad 29 .

[0053] When the rectangular seat 3 is attached to the inner wall of the pipe gallery, the crack on the inner wall of the pipe gallery is located inside the rubber ring 30, so that the rubber ring 30 that fits the inner wall of the pipe gallery prevents the gas penetrating the crack from flowing out from the gap between the inner wall of the pipe gallery and the blocking block 4.

[0054] A method for blocking gas leakage in a pipe gallery, the method comprising the following steps:

[0055] S1, after the rectangular block is vertically attached to the crack, the rectangular block is fixed by two sets of telescopic support frames 10;

[0056] The entire telescopic support frame 10 is driven to rotate by the No. 1 threaded rod 23 hinged to the rectangular seat 3. When the rectangular seat 3 is fixed, the telescopic support frame 10 located above is rotated to the horizontal, and then the sleeve 24 and the No. 2 threaded rod 25 are rotated to make the contact plate 26 contact the inner wall of the pipe gallery. Then, the telescopic support frame 10 located below is rotated to be inclined, and then the sleeve 24 and the No. 2 threaded rod 25 are rotated again to make the corresponding contact plate 26 contact the inner wall of the pipe gallery. Finally, Fig. 9 As shown, the two sets of telescopic support frames 10 will form a triangle shape with the inner wall of the pipe gallery, thereby improving the stability of the rectangular seat 3.

[0057] S2, injecting the liquid filling agent into the injection tube 19, and then pressing the push rod 20;

[0058] By pressing the push rod 20, the liquid filler in the injection tube 19 is pressed into the strip groove 5 through the injection port 21. When the liquid filler enters the strip groove 5, the blocking slide 8 will be driven to move, and finally the elastic pressure strip 9 will bounce from the receiving groove 6 into the strip groove 5. When the elastic pressure strip 9 bounces into the strip groove 5, the elastic pressure strip 9 will cut off the connection channel between the injection port 21 and the strip groove 5. Therefore, when the liquid filler dries, only the injection port 21 and the injection tube 19 will form a solidified body. Since the inner diameter of the injection port 21 is consistent with the inner diameter of the injection tube 19, the outer diameter of the push rod 20 is consistent with the inner diameter of the injection tube 19. Therefore, after the rectangular seat 3 is removed, the solidified body in the injection port 21 and the injection tube 19 can be pushed out by the push rod 20.

[0059] S3, after the elastic pressure strip 9 is pressed down, the injection of the liquid filling agent is stopped, and then a period of time is waited for the liquid filling agent to dry;

[0060] When the liquid filler is injected into the strip groove 5, the sealing slide bar 8 will be driven to slide in the strip groove 5 due to the hydraulic pressure. Then, as the sealing slide bar 8 slides, the crack blocked by the sealing slide bar 8 will gradually be exposed in the strip groove 5. When the crack is exposed, the gas ejected from the crack will bring the liquid filler in the strip groove 5 to the elastic pressure strip 9. When the sealing slide bar 8 slides to separate from the elastic pressure strip 9, the elastic pressure strip 9 will lose the resistance with the sealing slide bar 8 and immediately press toward the crack. Then, the liquid filler in the strip groove 5 will be pressed toward the crack by the elastic pressure strip 9, so that the liquid filler can overcome the air pressure in the crack and be spread onto the crack through the elastic pressure strip 9.

[0061] S4, when the liquid filling agent is dry, the rectangular block is removed from the inner wall of the pipe gallery.

[0062] After the liquid filling agent solidifies, the telescopic support frame 10 can be retracted to remove the rectangular seat 3 from the inner wall of the pipe gallery, wherein a release agent is applied in advance in the strip groove 5, so that when the liquid filling agent solidifies, the liquid filling agent will not adhere to the strip groove 5.

[0063] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A pressure plugging device for gas leakage in a pipe gallery, characterized in that: The invention comprises an attached plugging component (1) and a supporting and fixing component (2), wherein the attached plugging component (1) comprises a rectangular seat (3), a plugging block (4), an injection mechanism and an elastic pressure mechanism, wherein a flexible adhesive component is provided on one side of the rectangular seat (3), the plugging block (4) is strip-shaped, and the plugging block (4) is fixed to the side of the rectangular seat (3) provided with the flexible adhesive component, and strip grooves (5) and receiving grooves (6) are respectively provided on two sides of the plugging block (4), the strip grooves (5) face the flexible adhesive component, and the receiving grooves (6) are connected to the strip grooves (5), and a through-port (7) connected to the strip grooves (5) is provided on one of the peripheral walls of the plugging block (4), and the injection mechanism is provided on the plugging block (4), and the injection mechanism is located on the opposite side of the through-port (7), and the injection mechanism The invention is used for injecting liquid filling agent into the strip groove (5). The elastic agent pressing mechanism is arranged on the blocking block (4). The elastic agent pressing mechanism comprises a blocking slide (8) and an elastic pressure strip (9). The blocking slide (8) slides in the strip groove (5). The elastic pressure strip (9) is arranged in the receiving groove (6). The elastic pressure strip (9) is parallel to the blocking slide (8). The length of the elastic pressure strip (9) is less than the length of the blocking slide (8). The elastic pressure strip (9) is elastically connected to the blocking block (4). The elastic pressure strip (9) is pressed on the blocking slide (8). The support fixing component (2) is arranged on the side of the rectangular seat (3) away from the flexible fitting. The support fixing component (2) comprises two sets of telescopic support frames (10) for pressing the rectangular seat (3) against the inner wall of the pipe gallery.

2. A pressure plugging device for gas leakage in a pipe gallery according to claim 1, characterized in that: A rectangular sleeve (11) located beside the through opening (7) is fixedly provided on one side of the rectangular seat (3), a rubber sleeve (12) is embedded in the rectangular sleeve (11), and one end of the blocking slide bar (8) passes through the through opening (7) and then out of the rubber sleeve (12).

3. A pressure plugging device for gas leakage in a pipe gallery according to claim 1, characterized in that: A plurality of limit shafts (13) are formed on the side of the elastic pressure strip (9) away from the blocking slide (8) and are equidistantly distributed along the length direction of the elastic pressure strip (9). An avoidance groove (14) is provided on the rectangular seat (3) for the plurality of limit shafts (13) to pass through. Each limit shaft (13) is perpendicular to the elastic pressure strip (9). A fixing plate (15) and a plurality of limit plates (16) are fixedly provided on the side of the blocking block (4) close to the accommodating groove (6). The fixing plate (15) is parallel to the blocking block (4). Each limit shaft (13) passes through the fixing plate (15). A spring (17) is sleeved on each limit shaft (13). The two ends of the spring (17) are respectively in contact with the fixing plate (15) and the elastic pressure strip (9). A limit nut (18) is screwed onto the end of each limit shaft (13).

4. A pressure plugging device for gas leakage in a pipe gallery according to claim 1, characterized in that: The injection mechanism comprises an injection tube (19) and a push rod (20); an injection port (21) communicating with the strip groove (5) is formed on a side of the blocking block (4) facing away from the through port (7); one end of the injection tube (19) is fixed to the injection port (21); the push rod (20) is inserted into the injection tube (19) through the other end of the injection tube (19); the inner diameter of the injection port (21) is consistent with the inner diameter of the injection tube (19); and the outer diameter of the push rod (20) is consistent with the inner diameter of the injection tube (19).

5. The pressure plugging device for gas leakage in a pipe gallery according to claim 1 is characterized in that: Two groups of telescopic support frames (10) are distributed vertically up and down, and each group of telescopic support frames (10) comprises two telescopic rods (22) distributed horizontally left and right, and each telescopic rod (22) comprises a No. 1 threaded rod (23), a rotating sleeve (24), a No. 2 threaded rod (25), a universal joint (27) and a contact plate (26). The No. 1 threaded rod (23) and the No. 2 threaded rod (25) are respectively coaxially rotatably arranged at two ends of the rotating sleeve (24), one end of the No. 1 threaded rod (23) away from the rotating sleeve (24) is hinged on the side wall of the rectangular seat (3), and the contact plate (26) is connected to one end of the No. 2 threaded rod (25) away from the rotating sleeve (24) through the universal joint (27), and the two adjacent No. 1 threaded rods (23) on the left and right are connected through a horizontal connecting rod (28).

6. A pressure plugging device for gas leakage in a pipe gallery according to claim 1, characterized in that: The flexible fitting comprises four groups of rubber pads (29) distributed in a rectangular shape on four end corners of the rectangular seat (3), and each rubber pad (29) is fixedly connected to the side wall of the rectangular seat (3).

7. A pressure plugging device for gas leakage in a pipe gallery according to claim 6, characterized in that: A rubber ring (30) surrounding the strip groove (5) is fixedly provided on one side of the sealing block (4) close to the rubber pad (29).

8. A method for plugging gas leakage in a pipe gallery, comprising a pressure plugging device for gas leakage in a pipe gallery as claimed in claim 1, characterized in that: The method comprises the following steps: S1, attaching the rectangular block vertically to the crack, and fixing the rectangular block by two sets of telescopic support frames (10); S2, injecting a liquid filling agent into the injection tube (19), and then pressing the push rod (20); S3, after the elastic pressure strip (9) is pressed down, the injection of the liquid filling agent is stopped, and then a period of time is waited for the liquid filling agent to dry; S4, when the liquid filling agent is dry, the rectangular block is removed from the inner wall of the pipe gallery.

Images