Hole sealing device for magnetic slurry grouting hole of coal mine

Abstract

The utility model discloses a hole sealing device for a coal mine magnetic slurry grouting hole. The hole sealing device comprises a grouting pipe, the rotating frame is rotationally arranged on the side wall of the grouting pipe; the blades are circumferentially arrayed on the end face of the grouting pipe and are in running fit with the grouting pipe; the pull rod is rotationally arranged on the side wall of the blade and is movably connected with the rotating frame; and a sealing assembly. According to the hole sealing device for the coal mine magnetic slurry grouting hole, after grouting is finished, the sealing piece is rapidly deformed and closed, magnetic slurry is prevented from flowing back, when a grouting pump is separated from a grouting pipe, the rotating frame rotates and pulls the pull rod, the pull rod rotates and drives the blades to rotate at the same time, and therefore the multiple opened blades are closed together, and the grouting hole sealing effect is achieved. When the blades are closed, the grouting holes of the grouting pipe are sealed by the multiple blades, magnetic grout in the crack is effectively prevented from flowing back along the grouting pipe, loss of the magnetic grout poured into the crack is avoided, and the stability and the bearing capacity of the underground space are improved.

Description

Technical Field

[0001] This utility model relates to the field of grouting pipe technology, specifically to a sealing device for magnetic grouting holes in coal mines. Background Technology

[0002] During coal mining, cracks and pores will appear in the tunnels and shafts of the coal mine. In order to prevent the coal mine from collapsing, magnetic grout needs to be injected into the cracks and pores through grouting pipes. The magnetic grout can seal the cracks and pores, forming a solid system, thereby improving the stability and bearing capacity of the underground space.

[0003] In existing grouting pipes, magnetic grout is continuously injected into the grouting pipe through the grouting hole by a grouting pump. The magnetic grout overflows from the grouting pipe through holes in the side wall and is injected into cracks and pores. After solidification, the magnetic grout can seal the cracks and pores. However, the magnetic grout takes a certain amount of time to solidify. When the grouting pump leaves the grouting pipe, if the magnetic grout has not solidified in time, it will flow out through the grouting hole, causing the magnetic grout injected into the cracks and pores to be lost. This seriously reduces the stability and bearing capacity of the underground space in the coal mine.

[0004] Therefore, it is necessary to provide a sealing device for magnetic grout injection holes in coal mines to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a sealing device for magnetic slurry injection holes in coal mines, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for magnetic slurry injection holes in coal mines, comprising:

[0007] Grouting pipe;

[0008] Rotary frame mounted on the side wall of the grouting pipe;

[0009] Blades arranged in a circular array on the end face of the grouting pipe and rotating to engage with it;

[0010] A pull rod that is rotatably mounted on the side wall of the blade and movably connected to the rotating frame;

[0011] A sealing assembly, comprising at least a sealing sheet arranged in a circumferential array on the sidewall of the grouting pipe.

[0012] Preferably, the side wall of the grouting pipe is provided with through holes arranged in a circumferential array, and a sealing plate is fixedly installed in the through holes. A cross groove is provided on the end face of the sealing plate.

[0013] Preferably, the sealing sheet is a rubber block.

[0014] Preferably, the end face of the grouting pipe is provided with a first rotating shaft arranged in a circumferential array, and blades are fixedly connected to the first rotating shaft.

[0015] Preferably, a second rotating shaft is movably mounted on the side wall of the blade, and a pull rod is movably connected to the side wall of the second rotating shaft.

[0016] Preferably, a third rotating shaft is movably mounted on the side wall of the pull rod, and the side wall of the third rotating shaft is movably connected to the rotating frame.

[0017] In the above technical solution, the sealing device for magnetic slurry injection holes in coal mines provided by this utility model has the following beneficial effects:

[0018] This invention, by incorporating a rotating frame, blades, a tie rod, and sealing plates on the grouting pipe, facilitates the sealing of the grouting holes after grouting. The sealing plates, installed within through holes in the sidewall of the grouting pipe, deform and open under pressure during grouting, allowing magnetic grout to flow into the cracks for filling. After grouting, the sealing plates quickly deform and close, preventing backflow of the magnetic grout. When the grouting pump disengages from the grouting pipe, the rotating frame rotates and pulls the tie rod, causing the blades to rotate simultaneously. This closes the multiple open blades, effectively sealing the grouting holes and preventing backflow of the magnetic grout into the cracks. This avoids the loss of injected magnetic grout, improving the stability and load-bearing capacity of the underground space.

[0019] This invention, by setting a first rotating shaft, a second rotating shaft, and a third rotating shaft, can conveniently drive the blades to open or close. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the rotating frame structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the tie rod of this utility model;

[0024] Figure 4This is a schematic diagram of the blade structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the sealing sheet structure of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Grouting pipe; 2. Through hole; 3. Sealing plate; 4. First rotating shaft; 5. Blade; 6. Second rotating shaft; 7. Tie rod; 8. Third rotating shaft; 9. Rotating frame; 11. Cross groove. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-5 As shown, a sealing device for magnetic grout injection holes in coal mines includes:

[0030] Grouting pipe 1;

[0031] Rotate the rotating frame 9, which is mounted on the side wall of the grouting pipe 1;

[0032] Blades 5 are arranged in a circular array on the end face of the grouting pipe 1 and rotate to engage with it;

[0033] A pull rod 7 is rotatably mounted on the side wall of blade 5 and movably connected to the rotating frame 9;

[0034] A sealing assembly, comprising at least a sealing sheet 3 arranged in a circumferential array on the sidewall of the grouting pipe 1.

[0035] Specifically, when the grouting pump continuously injects magnetic grout into the grouting pipe 1, the sealing plate 3 installed in the through hole 2 opened in the side wall of the grouting pipe 1 is opened by pressure, allowing the magnetic grout to pass through the sealing plate 3 and be injected into the cracks and pores. When the grouting pump stops injecting magnetic grout, the sealing plate 3 closes quickly because the magnetic grout can no longer provide pressure to the sealing plate 3, thus preventing the magnetic grout from flowing back along the through hole 2. When the grouting pump's delivery pipe is disconnected from the grouting pipe 1, the rotating frame 9 is rotated, causing the rotating frame 9 to pull the pull rod 7 to rotate. The rotation of the pull rod 7 drives the blades 5 to rotate, causing multiple blades 5 to rotate and close together to seal the grouting pipe 1, thereby sealing the grouting hole and preventing the magnetic grout from flowing back from the grouting hole.

[0036] In the above embodiments, by setting a rotating frame 9, blades 5, a tie rod 7, and a sealing plate 3 on the grouting pipe 1, the grouting hole of the grouting pipe 1 can be easily sealed after grouting. The sealing plate 3 is installed in the through hole 2 opened in the side wall of the grouting pipe 1, so that the sealing plate 3 is deformed and opened under pressure during grouting, allowing the magnetic grout in the grouting pipe 1 to flow into the crack for filling. After grouting, the sealing plate 3 quickly deforms and closes to prevent the magnetic grout from flowing back. When the grouting pump is disengaged from the grouting pipe 1, the rotating frame 9 rotates and pulls the tie rod 7, causing the tie rod 7 to rotate while simultaneously rotating the blades 5, thus closing the multiple opened blades 5 together. When the blades 5 are closed, the grouting hole of the grouting pipe 1 is sealed by the multiple blades 5, effectively preventing the magnetic grout in the crack from flowing back along the grouting pipe 1, avoiding the loss of the magnetic grout injected into the crack, and improving the stability and bearing capacity of the underground space.

[0037] As a further embodiment of this utility model, the side wall of the grouting pipe 1 is provided with through holes 2 arranged in a circumferential array, and a sealing plate 3 is fixedly installed in the through holes 2. A cross groove 11 is provided on the end face of the sealing plate 3.

[0038] Furthermore, the sealing sheet 3 is a rubber block.

[0039] Specifically, by installing a rubber sealing sheet 3 inside the through hole 2, the sealing sheet 3 can seal the through hole 2. By opening a cross groove 11 on the sealing sheet 3, the sealing sheet 3 can deform and open when subjected to pressure, so that the magnetic slurry can flow through the sealing sheet 3 into the gap.

[0040] As another embodiment of this utility model, a first rotating shaft 4 arranged in a circular array is provided on the end face of the grouting pipe 1, and blades 5 are fixedly connected to the first rotating shaft 4.

[0041] Specifically, the blade 5 is connected to the first rotating shaft 4, so that the blade 5 can rotate along the first rotating shaft 4 when driven, thereby enabling the blade 5 to open and close.

[0042] As a further embodiment of this utility model, a second rotating shaft 6 is movably mounted on the side wall of the blade 5, and a pull rod 7 is movably connected to the side wall of the second rotating shaft 6.

[0043] Specifically, the pull rod 7 is connected to the second rotating shaft 6, so that the pull rod 7 can rotate along the second rotating shaft 6 while pulling the blade 5.

[0044] As a further embodiment of this utility model, a third rotating shaft 8 is movably mounted on the side wall of the pull rod 7, and the side wall of the third rotating shaft 8 is movably connected to the rotating frame 9.

[0045] Specifically, as the rotating frame 9 rotates, it drives the third rotating shaft 8 to move, which in turn pulls the pull rod 7 to move. At the same time, the pull rod 7 is driven to rotate along the third rotating shaft 8 to automatically adjust its position, thereby enabling the pull rod 7 to open and close the blade 5.

[0046] Working principle: When the grouting pump is inserted into the grouting pipe 1 for continuous grouting, the magnetic grout provides thrust to the sealing plate 3, causing the sealing plate 3 to open along the cross groove 11, so that the magnetic grout can flow out and be injected into the crack. When the grouting pump stops grouting, the sealing plate 3 quickly deforms and closes, so that the sealing plate 3 seals the through hole 2 and prevents the magnetic grout from flowing back. When the grouting pump is disengaged from the grouting pipe 1, the rotating frame 9 is driven to rotate, so that the rotating frame 9 pulls the tie rod 7 to rotate and move, so that the tie rod 7 pulls multiple blades 5 to rotate and close. Through the rotation and closure of multiple blades 5, the grouting hole of the grouting pipe 1 can be sealed, so that the magnetic grout flows out along the grouting hole of the grouting pipe 1 completely.

[0047] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sealing device for magnetic slurry injection holes in coal mines, characterized in that, include: Grouting pipe (1); Rotate the rotating frame (9) which is mounted on the side wall of the grouting pipe (1); Blades (5) arranged in a circular array on the end face of the grouting pipe (1) and rotating to engage with it; Rotary rod (7) is rotatably mounted on the side wall of blade (5) and movably connected to rotating frame (9); A sealing assembly, comprising at least a sealing sheet (3) arranged in a circumferential array on the sidewall of the grouting pipe (1).

2. The sealing device of a coal mine magnetic slurry injection hole according to claim 1, characterized in that, The side wall of the grouting pipe (1) is provided with through holes (2) arranged in a circular array. A sealing plate (3) is fixedly installed in the through holes (2). A cross groove (11) is provided on the end face of the sealing plate (3).

3. The sealing device of a coal mine magnetic slurry injection hole according to claim 2, characterized in that, The sealing sheet (3) is a rubber block.

4. The sealing device of a coal mine magnetic slurry injection hole according to claim 1, characterized in that, The grouting pipe (1) has a first rotating shaft (4) arranged in a circular array on its end face, and blades (5) are fixedly connected to the first rotating shaft (4).

5. The sealing device of a coal mine magnetic slurry injection hole according to claim 4, characterized in that, A second rotating shaft (6) is movably mounted on the side wall of the blade (5), and a pull rod (7) is movably connected to the side wall of the second rotating shaft (6).

6. The sealing device of a coal mine magnetic slurry injection hole according to claim 5, characterized in that, A third rotating shaft (8) is movably mounted on the side wall of the pull rod (7), and the side wall of the third rotating shaft (8) is movably connected to the rotating frame (9).

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