Double-end water plugging device integrated with gas concentration monitoring function

Abstract

The utility model belongs to the technical field of mining double-end water shutoff devices, and particularly relates to a double-end water shutoff device integrated with a gas concentration monitoring function, which comprises a first water shutoff air bag and a second water shutoff air bag which are fixedly connected through an internal thread connecting square pipe; the gas detection assembly is used for detecting the gas concentration; the pushing pipe is used for pushing the device to move; the inflating part is communicated with the first water plugging air bag and the second water plugging air bag and is used for inflating and expanding the first water plugging air bag and the second water plugging air bag; the water injection part penetrates through the first water plugging air bag, and the water outlet end of the water injection part is located in a cavity formed between the first water plugging air bag and the second water plugging air bag; the screen display monitoring part is located at the tail end of the advancing direction of the first water plugging air bag, and the screen display monitoring part is electrically connected with the gas detection assembly. The device can monitor the gas concentration in the hole in real time, the change condition of the gas concentration can be mastered in time, safety accidents are avoided, and the safety of operators is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of double-end water plugging devices for mines, and in particular relates to a double-end water plugging device with an integrated gas concentration monitoring function. Background Art

[0002] As coal is continuously mined, the rock mass above the coal seam lacks support under the influence of mining. The upper rock mass in the goaf continues to collapse under the action of its own weight and ground stress, destroying and causing displacement and deformation of the upper rock mass. There are delamination cracks distributed continuously in the horizontal direction. In the vertical direction, due to the inconsistency of the rock mass collapse and sinking, vertical broken cracks are produced, forming a water-conducting fracture zone. If this area is not clearly detected underground, it will pose a major safety hazard.

[0003] In the actual mining process, a double-ended water plug is generally used for detection. Holes are drilled obliquely upward on the roofs of the two tunnels of the coal mining face. The double-ended water plug is then pushed to different heights and water is injected respectively to observe water loss in different areas. However, when the double-ended water plug is conducting a water injection test in the borehole, the cracks in the hole will expand with the injection of water, and the gas concentration in the coal seam roof may rise sharply, resulting in a safety accident. Therefore, there is an urgent need for a double-ended water plug device with an integrated gas concentration monitoring function for use in mines, which can monitor the gas concentration in the hole in real time when the double-ended water plug is injecting water in the borehole. Utility Model Content

[0004] The utility model aims to provide a double-end water shutoff device with integrated gas concentration monitoring function to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] A double-ended water shutoff device with integrated gas concentration monitoring function, comprising:

[0007] A first water-blocking airbag and a second water-blocking airbag are sequentially arranged along the traveling direction, wherein the first water-blocking airbag and the second water-blocking airbag are fixedly connected by an internally threaded square tube;

[0008] The end of the first water blocking airbag in the direction of travel is fixedly connected with a propulsion tube, and the front end of the second water blocking airbag in the direction of travel is fixedly connected with a second water blocking airbag front probe tube;

[0009] A gas detection assembly, fixedly connected to the front probe tube of the second water blocking airbag, for detecting gas concentration;

[0010] An inflation part, which is in communication with the first water blocking airbag and the second water blocking airbag and is used for inflating the first water blocking airbag and the second water blocking airbag;

[0011] A water injection portion passing through the first water blocking airbag, wherein a water outlet end of the water injection portion is located in a cavity formed between the first water blocking airbag and the second water blocking airbag;

[0012] The screen display monitoring unit is located at the end of the first water blocking airbag in the direction of travel, and the screen display monitoring unit is electrically connected to the gas detection component.

[0013] Preferably, the two ends of the first water blocking airbag are respectively fixedly connected with a first protection pad of the first water blocking airbag and a second protection pad of the first water blocking airbag; the first protection pad of the first water blocking airbag is located at the end of the first water blocking airbag in the direction of travel, and the propulsion tube is fixedly connected to an end of the first protection pad of the first water blocking airbag away from the first water blocking airbag;

[0014] A first fixing screw is coaxially fixedly connected to one end of the second protection pad of the first water blocking airbag away from the first water blocking airbag, and the first fixing screw is threadedly fixedly connected to the corresponding end of the internally threaded square tube;

[0015] The first water blocking airbag is connected to a first water blocking airbag air injection port, and the first water blocking airbag air injection port is connected to the inflation part.

[0016] Preferably, the two ends of the second water blocking airbag are respectively fixed with a first protection pad of the second water blocking airbag and a second protection pad of the second water blocking airbag, and the second protection pad of the second water blocking airbag is located at the front end of the second water blocking airbag in the traveling direction;

[0017] One end of the second protection pad of the second water blocking airbag away from the second water blocking airbag is fixedly connected to the front probe tube of the second water blocking airbag;

[0018] A second fixing screw is coaxially fixedly connected to one end of the first protection pad of the second water blocking airbag away from the second water blocking airbag, and the second fixing screw is threadedly fixedly connected to the corresponding end of the internally threaded square tube;

[0019] The second water blocking airbag is connected to a second water blocking airbag air injection port, and the second water blocking airbag air injection port is connected to the inflation part.

[0020] Preferably, the inflation part includes an inflation tube, one end of the inflation tube is connected to the air inlet end of the second water-blocking airbag inflation tube through a connecting valve, the air outlet end of the second water-blocking airbag inflation tube is connected to the second water-blocking airbag air injection port, and the side wall of the inflation tube is connected to the first water-blocking airbag air injection port.

[0021] Preferably, the water injection part comprises a water inlet pipe, the water outlet end of the water inlet pipe is connected to the water inlet end of the water delivery pipe, and the water outlet end of the water delivery pipe is connected to the pressure reducing part;

[0022] The side wall of the water delivery pipe is connected with a first water injection port, a second water injection port and a third water injection port, and the first water injection port, the second water injection port and the third water injection port are located in the cavity between the first water blocking airbag and the second water blocking airbag.

[0023] Preferably, the pressure reducing unit comprises a pressure reducing valve, and the pressure reducing valve is connected to the water outlet end of the water delivery pipe.

[0024] Preferably, the gas detection assembly comprises a square storage box, the square storage box is fixedly connected to the bottom side of the front probe tube of the second water blocking airbag through a fixing ring, and the front probe tube of the second water blocking airbag is axially connected to the side of the second protection pad of the second water blocking airbag away from the second water blocking airbag;

[0025] A gas concentration monitoring component is provided in the square storage box, and the gas concentration monitoring component is fixed to the top inner wall of the square storage box through a bracket;

[0026] A third square storage box notch is provided at the bottom of the square storage box, a second square storage box notch is provided on a side wall of the square storage box close to the front end in the direction of travel, and a first square storage box notch is provided on a side wall of the square storage box away from the front end in the direction of travel. The gas concentration monitoring component is electrically connected to the screen display monitoring part.

[0027] Preferably, the screen display monitoring unit includes an electronic display screen, and the electronic display screen is electrically connected to the gas concentration monitoring component through a quick junction box;

[0028] The quick junction box is located in a cavity between the first water blocking airbag and the second water blocking airbag.

[0029] Compared with the prior art, the utility model has the following advantages and technical effects:

[0030] Before use, the equipment is assembled. Then, when in use, the first water-blocking airbag and the second water-blocking airbag are inserted into the borehole under the action of the propulsion tube. The gas detection component at the front end can observe the gas concentration in the borehole. After moving to the designated position in the borehole, the first water-blocking airbag and the second water-blocking airbag are inflated through the inflation part, so that the airbag walls of the first water-blocking airbag and the second water-blocking airbag contact the side wall of the borehole, and a closed cavity is formed between the first water-blocking airbag and the second water-blocking airbag; then, water is injected into the closed cavity formed between the first water-blocking airbag and the second water-blocking airbag through the water injection part. The gas in the closed cavity overflows from the cracks in the upper part of the borehole due to the injection of water, and moves to the gas detection component. The gas value is detected by the gas detection component, and the operator monitors in real time through the screen display monitoring part. This device can monitor the gas concentration in the hole in real time, timely grasp the changes in the gas concentration in the borehole, and take emergency measures in time when the gas concentration in the coal seam roof rises sharply, so as to avoid safety accidents and ensure the safety of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0032] Figure 1 It is a schematic diagram of the structure of the utility model;

[0033] Figure 2 For this utility model Figure 1 A partial enlarged view of the middle part;

[0034] Figure 3 This is a schematic diagram of the structure of the first water blocking airbag of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the second water blocking airbag of the utility model;

[0036] Among them, 1. water inlet pipe; 2. inflation pipe; 3. first protective pad of the first water-blocking airbag; 4. first water-blocking airbag; 5. air injection port of the first water-blocking airbag; 6. second protective pad of the first water-blocking airbag; 7. water pipe; 8. first water injection port; 9. second water injection port; 10. connecting valve; 11. third water injection port; 12. pressure reducing valve; 13. first protective pad of the second water-blocking airbag; 14. inflation pipe of the second water-blocking airbag; 15. air injection port of the second water-blocking airbag; 16. second water-blocking airbag; 17. second water-blocking airbag first protective pad of the second water-blocking airbag; Two protective pads; 18. Second water-blocking airbag front probe tube; 19. Electronic display screen; 20. Propulsion tube; 21. Wire protection tube; 22. Wires; 23. Data transmission line; 24. First fixing screw; 25. Internally threaded square tube; 26. Quick junction box; 27. Second fixing screw; 28. First notch of square storage box; 29. ​​Fixing ring; 30. Bracket; 31. Square storage box; 32. Second notch of square storage box; 33. Gas concentration monitoring component; 34. Third notch of square storage box. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] Reference Figures 1 to 4 The utility model discloses a double-end water shutoff device with integrated gas concentration monitoring function, comprising:

[0040] A first water blocking airbag 4 and a second water blocking airbag 16 are sequentially arranged along the traveling direction, and the first water blocking airbag 4 and the second water blocking airbag 16 are fixedly connected by an internally threaded square tube 25;

[0041] The end of the first water blocking airbag 4 in the travel direction is fixedly connected with a propulsion tube 20, and the front end of the second water blocking airbag 16 in the travel direction is fixedly connected with a second water blocking airbag front probe tube 18;

[0042] A gas detection assembly, fixedly connected to the front probe tube 18 of the second water blocking airbag, is used to detect the gas concentration;

[0043] An inflation part, which is in communication with the first water blocking airbag 4 and the second water blocking airbag 16 and is used for inflating the first water blocking airbag 4 and the second water blocking airbag 16;

[0044] A water injection portion passes through the first water blocking airbag 4, and a water outlet end of the water injection portion is located in a cavity formed between the first water blocking airbag 4 and the second water blocking airbag 16;

[0045] The screen display monitoring part is located at the end of the first water blocking airbag 4 in the moving direction, and the screen display monitoring part is electrically connected to the gas detection component.

[0046] Before use, the equipment is assembled. Then, when in use, the first water-blocking airbag 4 and the second water-blocking airbag 16 are inserted into the borehole under the action of the propulsion tube 20. The gas detection assembly at the front end can observe the gas concentration in the borehole. After moving to the specified position in the borehole, the first water-blocking airbag 4 and the second water-blocking airbag 16 are inflated through the inflation part, so that the airbag walls of the first water-blocking airbag 4 and the second water-blocking airbag 16 are in contact with the side wall of the borehole, and a closed cavity is formed between the first water-blocking airbag 4 and the second water-blocking airbag 16; then, water is injected into the closed cavity formed between the first water-blocking airbag 4 and the second water-blocking airbag 16 through the water injection part. The gas in the closed cavity overflows from the cracks in the upper part of the borehole due to the injection of water, and moves to the gas detection assembly, and the gas value is detected by the gas detection assembly. The operator monitors in real time through the screen display monitoring unit. This device can monitor the gas concentration in the hole in real time, and timely grasp the changes in the gas concentration in the borehole. When the gas concentration in the coal seam roof rises sharply, emergency measures can be taken in time to avoid safety accidents and ensure the safety of operators.

[0047] Further optimizing the scheme, the two ends of the first water blocking airbag 4 are respectively fixedly connected with the first water blocking airbag first protection pad 3 and the first water blocking airbag second protection pad 6; the first water blocking airbag first protection pad 3 is located at the end of the first water blocking airbag 4 in the direction of travel, and the propulsion tube 20 is fixedly connected to the end of the first water blocking airbag first protection pad 3 away from the first water blocking airbag 4;

[0048] A first fixing screw 24 is coaxially fixedly connected to one end of the first water blocking airbag second protection pad 6 away from the first water blocking airbag 4, and the first fixing screw 24 is threadedly fixedly connected to the corresponding end of the internally threaded square tube 25;

[0049] The first water blocking airbag 4 is connected to a first water blocking airbag air injection port 5 , and the first water blocking airbag air injection port 5 is connected to the inflation part.

[0050] Further optimizing the solution, the two ends of the second water blocking airbag 16 are respectively fixed with the second water blocking airbag first protection pad 13 and the second water blocking airbag second protection pad 17, and the second water blocking airbag second protection pad 17 is located at the front end of the second water blocking airbag 16 in the direction of travel;

[0051] One end of the second water blocking airbag second protection pad 17 away from the second water blocking airbag 16 is fixedly connected to the second water blocking airbag front probe 18;

[0052] A second fixing screw 27 is coaxially fixedly connected to one end of the first protection pad 13 of the second water blocking airbag away from the second water blocking airbag 16, and the second fixing screw 27 is threadedly fixedly connected to the corresponding end of the internally threaded square tube 25;

[0053] The second water blocking airbag 16 is communicated with a second water blocking airbag air injection port 15 , and the second water blocking airbag air injection port 15 is communicated with the inflation part.

[0054] The first water-blocking airbag 4 and the second water-blocking airbag 16 are detachably connected, and a first fixing screw 24 is fixed to the second protection pad 6 of the first water-blocking airbag fixed to the first water-blocking airbag 4. The first fixing screw 24 is threadedly connected to one end of the internally threaded square tube 25, and the other end of the internally threaded square tube 25 is threadedly connected to the second fixing screw 27. The second fixing screw 27 is fixed to the first protection pad 13 of the second water-blocking airbag fixed to the second water-blocking airbag 16, thereby realizing the detachable connection between the first water-blocking airbag 4 and the second water-blocking airbag 16.

[0055] To further optimize the solution, the inflation part includes an inflation tube 2, one end of the inflation tube 2 is connected to the air inlet end of the second water-blocking airbag inflation tube 14 through a connecting valve 10, the air outlet end of the second water-blocking airbag inflation tube 14 is connected to the second water-blocking airbag air injection port 15, and the side wall of the inflation tube 2 is connected to the first water-blocking airbag air injection port 5.

[0056] The inflation tube 2 passes through the first protection pad 3 of the first water-blocking airbag, the first water-blocking airbag 4 and the second protection pad 6 of the first water-blocking airbag, and is connected with the interior of the first water-blocking airbag 4 through the first water-blocking airbag air injection port 5. The end of the inflation tube 2 is connected with the air inlet end of the second water-blocking airbag inflation tube 14 through the connecting valve 10. The second water-blocking airbag inflation tube 14 penetrates into the second water-blocking airbag 16 and is connected with the interior of the second water-blocking airbag 16 through the second water-blocking airbag air injection port 15.

[0057] By injecting air into the inflation tube 2, the first water blocking airbag 4 and the second water blocking airbag 16 can be expanded and pressed against the inner wall of the borehole, thereby achieving fastening of the device to the borehole.

[0058] After the first water blocking airbag 4 and the second water blocking airbag 16 are expanded, a closed cavity is formed between the first water blocking airbag 4 and the second water blocking airbag 16 .

[0059] According to a further optimized solution, the water injection part includes a water inlet pipe 1, the water outlet end of the water inlet pipe 1 is connected to the water inlet end of the water delivery pipe 7, and the water outlet end of the water delivery pipe 7 is connected to the pressure reducing part;

[0060] The side wall of the water delivery pipe 7 is connected with a first water injection port 8 , a second water injection port 9 and a third water injection port 11 , and the first water injection port 8 , the second water injection port 9 and the third water injection port 11 are located in the cavity between the first water blocking airbag 4 and the second water blocking airbag 16 .

[0061] According to a further optimized solution, the pressure reducing unit includes a pressure reducing valve 12 , and the pressure reducing valve 12 is connected to the water outlet end of the water supply pipe 7 .

[0062] The first water injection port 8, the second water injection port 9 and the third water injection port 11 are located in the cavity between the first water blocking airbag 4 and the second water blocking airbag 16. By injecting water into the water pipe 7, water is filled into the cavity between the first water blocking airbag 4 and the second water blocking airbag 16 through the first water injection port 8, the second water injection port 9 and the third water injection port 11, and the gas in the cavity is squeezed into the cracks at the upper part of the cavity.

[0063] Further optimized solution, the gas detection assembly includes a square storage box 31, the square storage box 31 is fixed to the bottom side of the second water blocking airbag front probe tube 18 through a fixing ring 29, and the second water blocking airbag front probe tube 18 is axially connected to the side of the second water blocking airbag second protection pad 17 away from the second water blocking airbag 16;

[0064] A gas concentration monitoring component 33 is provided in the square storage box 31, and the gas concentration monitoring component 33 is fixed to the top inner wall of the square storage box 31 through a bracket 30;

[0065] A third square storage box notch 34 is provided at the bottom of the square storage box 31, a second square storage box notch 32 is provided on a side wall of the square storage box 31 near the front end in the direction of travel, a first square storage box notch 28 is provided on a side wall of the square storage box 31 away from the front end in the direction of travel, and the gas concentration monitoring component 33 is electrically connected to the screen display monitoring part.

[0066] Further optimizing the scheme, the screen display monitoring unit includes an electronic display screen 19, and the electronic display screen 19 is electrically connected to the gas concentration monitoring component 33 through a quick junction box 26;

[0067] The quick junction box 26 is located in the cavity between the first water blocking airbag 4 and the second water blocking airbag 16 .

[0068] The electric wires 22 and the data transmission lines 23 are electrically connected to the gas concentration monitoring component 33, and the electric wires 22 and the data transmission lines 23 are wrapped inside the wire protection tube 21. The other ends of the electric wires 22 and the data transmission lines 23 are electrically connected to the quick junction box 26. Then, the electric wires 22 and the data transmission lines 23 wrapped with the wire protection tube 21 are electrically connected to the electronic display screen 19, and the two electric wires 22 and the two data transmission lines 23 are connected at the quick junction box 26 to realize the electrical connection between the electronic display screen 19 and the gas concentration monitoring component 33.

[0069] The gas concentration monitoring component 33 is placed on the bracket 30 of the square storage box 31. The square storage box 31 is fixed on the front probe 18 of the second water-blocking airbag through a fixing ring 29. There are a first square storage box notch 28, a second square storage box notch 32 and a third square storage box notch 34 on the wall of the square storage box 31. The three notches are semi-sealed with waterproof and breathable films. When the water injection test in the borehole is carried out, the gas overflows to the upper part of the borehole through the cracks, and the gas concentration is monitored by the gas concentration monitoring component 33.

[0070] The gas concentration monitoring component 33 includes a gas detector. The gas concentration monitoring component 33 is a prior art and will not be described in detail here.

[0071] The working process of the utility model is as follows: when in use, the first water blocking airbag 4 and the second water blocking airbag 16 are connected to the first external fixing screw 24 of the first water blocking airbag 4 and the second external fixing screw 27 of the second water blocking airbag 16 through the internally threaded square tube 25 with internal threads, the inflation tube 2 is connected to the second water blocking airbag inflation tube 14 of the second water blocking airbag 16 through the connecting valve 10, and the wires 22 and the data transmission line 23 in the wire protection tube 21 are connected respectively through the quick junction box 26;

[0072] The first water blocking airbag 4 and the second water blocking airbag 16 are extended into the borehole through the propulsion pipe 20, and the gas concentration in the borehole can be observed through the gas concentration monitoring component 33;

[0073] The high-pressure gas is ventilated into the first water-blocking airbag 4 through the inflation tube 2 from the first water-blocking airbag gas injection port 5 to form an air storage space. The inflation tube 2 is connected to the second water-blocking airbag inflation tube 14 through the connecting valve 10. The high-pressure gas is injected into the second water-blocking airbag 16 through the second water-blocking airbag inflation tube 14 and the second water-blocking airbag gas injection port 15 to form an air storage space, so that the first water-blocking airbag 4 and the second water-blocking airbag 16 are in contact with the borehole wall.

[0074] A closed space is formed between the first water-blocking airbag 4 and the second water-blocking airbag 16. High-pressure water is injected into the closed space through the water inlet pipe 1 and the water delivery pipe 7, and then through the first water injection port 8, the second water injection port 9 and the third water injection port 11. Gas overflows to the upper part of the borehole through the cracks and enters the square storage box 31 through three gaps. The gas concentration is monitored by the gas concentration monitoring component 33.

[0075] The gas concentration during water injection is monitored in real time externally through an electronic display screen 19.

[0076] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A double-ended water shutoff device with integrated gas concentration monitoring function, characterized in that: include: A first water blocking airbag (4) and a second water blocking airbag (16) are sequentially arranged along the traveling direction, wherein the first water blocking airbag (4) and the second water blocking airbag (16) are fixedly connected via an internally threaded square tube (25); The end of the first water blocking airbag (4) in the direction of travel is fixedly connected to a propulsion tube (20), and the front end of the second water blocking airbag (16) in the direction of travel is fixedly connected to a second water blocking airbag front probe tube (18); A gas detection assembly, fixedly connected to the front probe tube (18) of the second water blocking airbag, for detecting gas concentration; an inflation portion, which is in communication with the first water blocking airbag (4) and the second water blocking airbag (16), and is used for inflating the first water blocking airbag (4) and the second water blocking airbag (16); A water injection portion passing through the first water blocking airbag (4), wherein a water outlet end of the water injection portion is located in a cavity formed between the first water blocking airbag (4) and the second water blocking airbag (16); The screen display monitoring unit is located at the end of the first water blocking airbag (4) in the direction of travel, and the screen display monitoring unit is electrically connected to the gas detection component.

2. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 1, characterized in that: The two ends of the first water blocking airbag (4) are respectively fixedly connected with a first water blocking airbag first protection pad (3) and a first water blocking airbag second protection pad (6); the first water blocking airbag first protection pad (3) is located at the end of the first water blocking airbag (4) in the direction of travel, and the propulsion tube (20) is fixedly connected to an end of the first water blocking airbag first protection pad (3) away from the first water blocking airbag (4); A first fixing screw (24) is coaxially fixedly connected to one end of the second protection pad (6) of the first water blocking airbag away from the first water blocking airbag (4), and the first fixing screw (24) is threadedly fixedly connected to the corresponding end of the internally threaded square tube (25); The first water blocking airbag (4) is connected to a first water blocking airbag air injection port (5), and the first water blocking airbag air injection port (5) is connected to the inflation portion.

3. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 2, characterized in that: The two ends of the second water blocking airbag (16) are respectively fixedly connected with a second water blocking airbag first protection pad (13) and a second water blocking airbag second protection pad (17), and the second water blocking airbag second protection pad (17) is located at the front end of the second water blocking airbag (16) in the moving direction; One end of the second protection pad (17) of the second water blocking airbag away from the second water blocking airbag (16) is fixedly connected to the front probe tube (18) of the second water blocking airbag; A second fixing screw (27) is coaxially fixedly connected to one end of the first protection pad (13) of the second water blocking airbag away from the second water blocking airbag (16), and the second fixing screw (27) is threadedly fixedly connected to the corresponding end of the internally threaded square tube (25); The second water blocking airbag (16) is connected to a second water blocking airbag air injection port (15), and the second water blocking airbag air injection port (15) is connected to the inflation portion.

4. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 3, characterized in that: The inflation portion comprises an inflation tube (2), one end of the inflation tube (2) being connected to the air inlet end of a second water-blocking airbag inflation tube (14) via a connecting valve (10), the air outlet end of the second water-blocking airbag inflation tube (14) being connected to the second water-blocking airbag air injection port (15), and the side wall of the inflation tube (2) being connected to the first water-blocking airbag air injection port (5).

5. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 3, characterized in that: The water injection part comprises a water inlet pipe (1), the water outlet end of the water inlet pipe (1) is connected to the water inlet end of the water delivery pipe (7), and the water outlet end of the water delivery pipe (7) is connected to the pressure reducing part; The side wall of the water delivery pipe (7) is connected to a first water injection port (8), a second water injection port (9) and a third water injection port (11); the first water injection port (8), the second water injection port (9) and the third water injection port (11) are located in the cavity between the first water blocking airbag (4) and the second water blocking airbag (16).

6. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 5, characterized in that: The pressure reducing unit comprises a pressure reducing valve (12), and the pressure reducing valve (12) is connected to the water outlet end of the water delivery pipe (7).

7. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 3, characterized in that: The gas detection assembly comprises a square storage box (31), the square storage box (31) is fixedly connected to the bottom side of the second water blocking airbag front probe tube (18) through a fixing ring (29), and the second water blocking airbag front probe tube (18) is axially connected to the side of the second water blocking airbag second protection pad (17) away from the second water blocking airbag (16); A gas concentration monitoring component (33) is provided in the square storage box (31), and the gas concentration monitoring component (33) is fixed to the top inner wall of the square storage box (31) through a bracket (30); A third square storage box notch (34) is provided at the bottom of the square storage box (31), a second square storage box notch (32) is provided on a side wall of the square storage box (31) close to the front end in the direction of travel, and a first square storage box notch (28) is provided on a side wall of the square storage box (31) away from the front end in the direction of travel. The gas concentration monitoring component (33) is electrically connected to the screen display monitoring unit.

8. A double-ended water shutoff device with integrated gas concentration monitoring function according to claim 7, characterized in that: The screen monitoring unit comprises an electronic display screen (19), and the electronic display screen (19) is electrically connected to the gas concentration monitoring component (33) via a quick junction box (26); The quick junction box (26) is located in the cavity between the first water blocking airbag (4) and the second water blocking airbag (16).

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