Hole sealing device capable of secondary grouting for coal mine gas extraction

Abstract

The utility model provides a hole sealing device capable of conducting secondary grouting for coal mine gas extraction, and belongs to the technical field of coal mining. The hole sealing device capable of achieving secondary grouting for coal mine gas extraction comprises a bottom plate, a grouting pipe and a secondary grouting mechanism. The bottom plate is used for supporting and moving a grouting hole sealing assembly. The grouting pipe is rectangular, and the grouting pipe is arranged at the central position of the bottom plate; the secondary grouting mechanism is located on the grouting pipe and comprises a grouting hole and a movable pipe, the grouting hole is formed in the outer surface of the grouting pipe and is a flowing channel for secondary grouting, the movable pipe can be manually controlled to open or close the grouting hole, and by pulling a connecting rod upwards, the connecting rod drives the movable pipe to slide upwards along a sliding groove through a protruding block. And the grouting holes are not shielded by the moving pipes, grout is injected into the holes through the grouting holes, secondary grouting can be carried out, and the plugging effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine mining, and specifically, to a hole - sealing device for coal mine gas extraction that can be grouted twice. Background Technique

[0002] At present, during the coal mine mining process, first, the gas in the coal seam needs to be extracted to ensure the safe progress of mining work and avoid gas explosion accidents. During the gas extraction process, holes left by the extraction pipeline exist. Therefore, after the gas extraction is completed, grouting is required and then the holes are blocked. The grouting fills the holes and then solidifies to reinforce the holes, avoiding the situation of cracks around the holes causing collapse, which affects the safety of underground coal mine workers.

[0003] After retrieval, in the Chinese utility model patent application number: CN202321584512.8, a hole - sealing grouting device for coal mine gas extraction is disclosed. Through the use of a driving component, the driving component controls the height adjustment of the hole - sealing grouting port, thereby improving the flexibility of the grouting device during operation. At the same time, the position of the hole - sealing grouting port for secondary grouting can be adjusted according to holes of different depths, thereby improving the reinforcement safety of the grouting device for blocking holes. Then, through the use of a stabilizing component, the stabilizing component fixes the grouting device for use, thereby improving the stability of the grouting device during operation. However, only single - time grouting can be performed during hole - sealing grouting, and there may be a situation of the blocking effect. Content of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a hole - sealing device for coal mine gas extraction that can be grouted twice to overcome the above - mentioned technical problems or at least partially solve the above problems.

[0005] The utility model provides a hole - sealing device for coal mine gas extraction that can be grouted twice, including

[0006] A bottom plate, which is used to support and move the components for hole - sealing grouting;

[0007] A grouting pipe, which is rectangular in shape and is arranged at the central position of the bottom plate;

[0008] A secondary grouting mechanism, which is located on the grouting pipe and includes a grouting hole and a moving pipe. The grouting hole is opened on the outer surface of the grouting pipe, and the grouting hole is the flow - through path for secondary grouting. The moving pipe can be manually controlled to open or close the grouting hole.

[0009] In a preferred solution, a plurality of the grouting holes are provided, and the plurality of grouting holes are evenly arranged on the grouting pipe.

[0010] In a preferred embodiment, a chute is formed on the inner wall of the grouting pipe, the moving pipe is slidably connected to the inner wall of the chute, a convex block is fixedly connected to the inner wall of the moving pipe, and a connecting rod is fixedly connected to the top of the convex block.

[0011] In a preferred embodiment, a hopper is fixedly connected to the top of the grouting pipe, the connecting rod passes through the hopper, and a limiting plate is rotatably installed on the connecting rod.

[0012] In a preferred embodiment, a fixing plate is arranged directly above the bottom plate, the grouting pipe is fixedly connected to the fixing plate, a fixing rod is fixedly connected to the top of the fixing plate, and two limiting blocks are fixedly connected to the side of the fixing rod close to the connecting rod.

[0013] In a preferred embodiment, a height adjusting mechanism is arranged between the bottom plate and the fixing plate, and the height adjusting mechanism includes a motor and a slider, and the motor is fixedly connected to the bottom plate.

[0014] In a preferred embodiment, the output end of the motor is fixedly connected to a lead screw, the lead screw is rotatably connected to the bottom plate through a bearing, a limiting rod is fixedly connected to the bottom plate, two sliders are provided, one slider is threadedly connected to the lead screw, and the other slider is slidably connected to the limiting rod. The slider is rotatably connected to a support rod, and the support rod is rotatably connected to the fixing plate.

[0015] In a preferred embodiment, a vertical rod is fixedly connected to the top of the bottom plate, the fixing plate is slidably connected to the vertical rod, and a circular plate is fixedly connected to the other end of the vertical rod.

[0016] In a preferred embodiment, a channel is formed on the top of the bottom plate, universal wheels are installed on the bottom of the bottom plate, a handle is fixedly connected to the top of the bottom plate, and an anti-slip sleeve is sleeved on the handle.

[0017] By providing a secondary grouting mechanism, during the first grouting, the slurry is grouted through the grouting pipe. During the secondary grouting, the connecting rod is pulled upward, and the connecting rod drives the moving pipe to slide upward along the chute through the convex block, so that the moving pipe no longer blocks the grouting hole, and the slurry grouts into the hole through the grouting hole, and the plugging effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of the overall structure provided by the embodiment of the present invention;

[0019] Figure 2 is a schematic side view structure diagram provided by the embodiment of the present invention;

[0020] Figure 3 is provided by the embodiment of the present invention Figure 2 Schematic enlarged view of the structure of part A in

[0021] Figure 4 Schematic cross-sectional structure diagram of the grouting pipe provided by the embodiment of the present utility model.

[0022] In the figure: 1, bottom plate; 2, secondary grouting mechanism; 201, grouting hole; 202, moving pipe; 203, convex block; 204, connecting rod; 205, sliding groove; 3, height adjustment mechanism; 301, motor; 302, lead screw; 303, limiting rod; 304, slider; 305, support rod; 306, vertical rod; 307, circular plate; 4, grouting pipe; 5, hopper; 6, limiting plate; 7, fixed rod; 8, limiting block; 9, fixing plate; 10, channel; 11, universal wheel; 12, handle; 13, anti-slip sleeve. Specific embodiments

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Refer to Figures 1-4 , the present utility model provides a technical solution: a hole sealing device for coal mine gas extraction with secondary grouting function, including a bottom plate 1, a grouting pipe 4 and a secondary grouting mechanism 2. The bottom plate 1 is used to support and move the components for hole sealing by grouting; the grouting pipe 4 is set as a rectangle and is arranged at the center position of the bottom plate 1; the secondary grouting mechanism 2 is located on the grouting pipe 4 and includes a grouting hole 201 and a moving pipe 202. The grouting hole 201 is opened on the outer surface of the grouting pipe 4 and is the flow path for secondary grouting. The moving pipe 202 can be manually controlled to open or close the grouting hole 201. During the first grouting, the slurry is grouted through the grouting pipe 4, and during the secondary grouting, the slurry is grouted through the grouting hole 201;

[0025] A plurality of grouting holes 201 are provided, and the plurality of grouting holes 201 are evenly arranged on the grouting pipe 4. A sliding groove 205 is opened on the inner wall of the grouting pipe 4, and the moving pipe 202 is slidably connected to the inner wall of the sliding groove 205. A convex block 203 is fixedly connected to the inner wall of the moving pipe 202, and a connecting rod 204 is fixedly connected to the top of the convex block 203. By pulling the connecting rod 204 upward, the connecting rod 204 drives the moving pipe 202 to slide upward along the sliding groove 205 through the convex block 203, so that the moving pipe 202 no longer blocks the grouting hole 201, and the slurry grouts into the hole through the grouting hole 201, enabling secondary grouting and better plugging effect;

[0026] The top of the grouting pipe 4 is fixedly connected with a hopper 5. The connecting rod 204 passes through the hopper 5, and a limiting plate 6 is rotatably installed on the connecting rod 204. A fixing plate 9 is arranged directly above the bottom plate 1, and the grouting pipe 4 is fixedly connected with the fixing plate 9. A fixing rod 7 is fixedly connected to the top of the fixing plate 9. A limiting block 8 is fixedly connected to one side of the fixing rod 7 close to the connecting rod 204. There are two limiting blocks 8. By arranging the limiting plate 6 and the limiting block 8, after the moving pipe 202 is pushed to the bottommost position to block the grouting hole 201, the limiting plate 6 is rotated so that the top of the limiting plate 6 abuts against the bottom of the lower limiting block 8. When the moving pipe 202 is pulled to the highest position, after the grouting hole 201 is opened, the limiting plate 6 is rotated so that the bottom of the limiting plate 6 abuts against the top of the lower limiting block 8, which is used to limit the moving pipe 202;

[0027] A height adjusting mechanism 3 is arranged between the bottom plate 1 and the fixing plate 9. The height adjusting mechanism 3 includes a motor 301 and a slider 304. The motor 301 is fixedly connected to the bottom plate 1. The output end of the motor 301 is fixedly connected with a lead screw 302. The lead screw 302 is rotatably connected to the bottom plate 1 through a bearing. A limiting rod 303 is fixedly connected to the bottom plate 1. There are two sliders 304. One slider 304 is threadedly connected with the lead screw 302, and the other slider 304 is slidably connected with the limiting rod 303. The slider 304 is rotatably connected with a support rod 305. The support rod 305 is rotatably connected with the fixing plate 9. A vertical rod 306 is fixedly connected to the top of the bottom plate 1. The fixing plate 9 is slidably connected with the vertical rod 306. The other end of the vertical rod 306 is fixedly connected with a circular plate 307. By starting the motor 301, the output end of the motor 301 drives the lead screw 302 to rotate. Under the restriction of the limiting rod 303, the slider 304 slides along the limiting rod 303. The slider 304 drives the support rod 305 to rotate. The support rod 305 drives the fixing plate 9 and the grouting pipe 4 to move up and down along the vertical rod 306, thereby adjusting the height of the grouting pipe 4 and improving the flexibility of the grouting work. The motor 301 is electrically connected to the storage battery;

[0028] A channel 10 is opened on the top of the bottom plate 1. Universal wheels 11 are installed at the bottom of the bottom plate 1. A handle 12 is fixedly connected to the top of the bottom plate 1. An anti-slip sleeve 13 is sleeved on the handle 12. The channel 10 is used for the movement of the grouting pipe 4. The universal wheels 11 have a self-locking function.

[0029] Specifically, the working process or working principle of the coal mine gas extraction and secondary grouting sealing device is as follows: The staff pushes the device to the hole, then starts the motor 301. The output end of the motor 301 drives the lead screw 302 to rotate. Under the restriction of the limiting rod 303, the slider 304 slides along the limiting rod 303. The slider 304 drives the support rod 305 to rotate. The support rod 305 drives the fixing plate 9 and the grouting pipe 4 to move up and down along the vertical rod 306, thereby adjusting the height of the grouting pipe 4 and inserting the grouting pipe 4 into the hole, and then sending the slurry into the grouting pipe 4 for grouting.

[0030] When secondary grouting is required, the staff pulls the connecting rod 204 upward. The connecting rod 204 drives the moving pipe 202 to slide upward along the chute 205 through the convex block 203, so that the moving pipe 202 no longer blocks the grouting hole 201, and the slurry grouts into the hole through the grouting hole 201, enabling secondary grouting with a better plugging effect. By setting the limiting plate 6 and the limiting block 8, after the moving pipe 202 is pushed to the bottom to block the grouting hole 201, the limiting plate 6 is rotated so that the top of the limiting plate 6 abuts against the bottom of the lower limiting block 8. When the moving pipe 202 is pulled to the highest position, after the grouting hole 201 is opened, the limiting plate 6 is rotated so that the bottom of the limiting plate 6 abuts against the top of the lower limiting block 8, which is used to limit the moving pipe 202.

Claims

1. A sealing device for coal mine gas extraction with secondary grouting, characterized in that: include A bottom plate (1), the bottom plate (1) being used to support and move components for grouting and sealing holes; A grouting pipe (4), wherein the grouting pipe (4) is arranged in a rectangular shape and is arranged at the center of the bottom plate (1); A secondary grouting mechanism (2) is located on a grouting pipe (4), and comprises a grouting hole (201) and a movable pipe (202); the grouting hole (201) is opened on the outer surface of the grouting pipe (4); the grouting hole (201) is a flow passage for secondary grouting; and the movable pipe (202) can be manually controlled to open or close the grouting hole (201).

2. A sealing device for coal mine gas extraction with secondary grouting according to claim 1, characterized in that: A plurality of grouting holes (201) are provided, and the plurality of grouting holes (201) are evenly arranged on the grouting pipe (4).

3. A sealing device for coal mine gas extraction with secondary grouting according to claim 2, characterized in that: The inner wall of the grouting pipe (4) is provided with a slide groove (205), the movable pipe (202) is slidably connected to the inner wall of the slide groove (205), the inner wall of the movable pipe (202) is fixedly connected with a protrusion (203), and the top of the protrusion (203) is fixedly connected with a connecting rod (204).

4. A sealing device for coal mine gas extraction with secondary grouting according to claim 3, characterized in that: The top of the grouting pipe (4) is fixedly connected to a hopper (5), the connecting rod (204) passes through the hopper (5), and a limit plate (6) is rotatably mounted on the connecting rod (204).

5. A sealing device for coal mine gas extraction with secondary grouting according to claim 4, characterized in that: A fixing plate (9) is arranged directly above the bottom plate (1), the grouting pipe (4) is fixedly connected to the fixing plate (9), a fixing rod (7) is fixedly connected to the top of the fixing plate (9), a limiting block (8) is fixedly connected to the side of the fixing rod (7) close to the connecting rod (204), and two limiting blocks (8) are arranged.

6. A sealing device for coal mine gas extraction with secondary grouting according to claim 5, characterized in that: A height adjustment mechanism (3) is provided between the base plate (1) and the fixed plate (9); the height adjustment mechanism (3) comprises a motor (301) and a slider (304); the motor (301) is fixedly connected to the base plate (1).

7. A sealing device for coal mine gas extraction with secondary grouting according to claim 6, characterized in that: The output end of the motor (301) is fixedly connected to a screw rod (302), the screw rod (302) is rotatably connected to the base plate (1) via a bearing, a limit rod (303) is fixedly connected to the base plate (1), two sliders (304) are provided, one of the sliders (304) is threadedly connected to the screw rod (302), and the other of the sliders (304) is slidably connected to the limit rod (303), the slider (304) is rotatably connected to a support rod (305), and the support rod (305) is rotatably connected to the fixed plate (9).

8. A sealing device for coal mine gas extraction with secondary grouting according to claim 7, characterized in that: The top of the bottom plate (1) is fixedly connected to a vertical rod (306), the fixed plate (9) is slidably connected to the vertical rod (306), and the other end of the vertical rod (306) is fixedly connected to a circular plate (307).

9. A sealing device for coal mine gas extraction with secondary grouting according to claim 8, characterized in that: A channel (10) is provided at the top of the base plate (1), a universal wheel (11) is installed at the bottom of the base plate (1), a handle (12) is fixedly connected to the top of the base plate (1), and an anti-slip sleeve (13) is sleeved on the handle (12).

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