Grouting device for goaf of coal mine

Abstract

The utility model relates to the technical field of goaf grouting, in particular to a coal mine goaf grouting device which comprises a sleeve structure, a grouting pipe is arranged in the sleeve structure, the sleeve structure comprises a top pipe, a bottom pipe and a middle pipe, and airflow channels are formed in the top pipe, the bottom pipe and the middle pipe. A plurality of hollow supporting discs are evenly fixed between the two sides in the airflow channel, a plurality of protruding frames are fixed to the positions, close to the lower portions, of the side faces of the top pipe, the bottom pipe and the middle pipe, air holes are formed in the side faces of the protruding frames, and vent holes communicated with the airflow channel are formed in the positions, located on the protruding frames, of the side faces of the top pipe, the bottom pipe and the middle pipe. The bottom pipe is connected with the middle pipe connecting disc through a bolt, and an air outlet is formed in one side of the top pipe. The grouting pipe solves the problems that an existing grouting pipe cannot be suitable for goaf areas with different depths, the structure is complex, and later maintenance and replacement are not convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of goaf grouting, in particular to a coal mine goaf grouting device. Background Art

[0002] Grouting in coal mine goaf is a complex and critical technology that is of great significance for ensuring safe production in mines, preventing geological disasters, and achieving effective resource utilization. Grouting materials can effectively fill the gaps in the goaf, increase the overall stability of the goaf, prevent ground subsidence, and provide good conditions for subsequent coal mining.

[0003] A Chinese utility model patent application numbered CN202322328807.5 discloses a coal mine goaf grouting device. The device comprises a grouting pipe and an exhaust hose. The grouting pipe has an axially defined passage through which the exhaust hose passes, with the outer circumference of the exhaust hose abutting against the inner circumference of the passage. The exhaust hose is inserted into the grouting pipe passage, allowing one end of the hose to protrude into the goaf and the other end to remain outside the goaf. This facilitates the removal of air from the goaf and facilitates grouting.

[0004] However, the existing grouting pipe is generally of fixed length and cannot be applied to grouting in goafs of different depths. In addition, the exhaust hose is located inside the grouting pipe, which has a complex structure and is difficult to repair and replace after damage. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing grouting pipe cannot be applied to goafs of different depths and has a relatively complex structure, making it inconvenient for later maintenance and replacement.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a grouting device for coal mine goaf, including a casing structure, a grouting pipe is arranged in the casing structure, the casing structure includes a top pipe, a bottom pipe and an intermediate pipe, and air flow channels are opened inside the top pipe, the bottom pipe and the intermediate pipe, and a number of hollow support plates are evenly fixed between the two sides of the air flow channel, and a number of convex frames are fixed on the sides of the top pipe, the bottom pipe and the intermediate pipe near the bottom, and air holes are opened on the sides of the convex frames, and air holes connected to the air flow channel are opened on the sides of the top pipe, the bottom pipe and the intermediate pipe at the convex frames, and connecting plates are fixed at both ends of the bottom pipe and the intermediate pipe, and the bottom pipe and the intermediate pipe connecting plates are connected by bolts, and an air outlet connected to the air flow channel is opened on one side of the top pipe.

[0007] As a further solution of the present invention: air ports are provided at both ends of the middle tube at the air flow channel, and the top of the top tube and the bottom of the bottom tube are both in a sealed state at the air flow channel.

[0008] As a further solution of the present invention, reinforcing ribs are fixed between the connecting plates and the outer side walls of the top tube, the bottom tube and the middle tube.

[0009] As a further solution of the present invention: a fixing plate is fixed on the top of the jacking pipe for connecting with an external fixing bracket structure.

[0010] As a further solution of the present invention, an air pipe is fixed to the air outlet through bolt connection to facilitate exhaust or connect with an air pump.

[0011] As a further solution of the present invention, the air flow channels among the top pipe, the bottom pipe and the middle pipe are interconnected to facilitate exhaust.

[0012] Compared with the prior art, the advantages of the present invention are that: the patent adds a top pipe, a bottom pipe and several intermediate pipes, which can be connected to adapt to goafs of different depths and to facilitate exhaust during grouting; and the pipeline is an integrated structure, which is easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a three-dimensional diagram of the overall structure of a coal mine goaf grouting device of the utility model.

[0015] Figure 2 This is a partial structural section of a coal mine goaf grouting device in the utility model. Figure 1 .

[0016] Figure 3 This is a partial structural section of a coal mine goaf grouting device in the utility model. Figure 2 .

[0017] Figure 4 This is an enlarged view of the structure of part A in a coal mine goaf grouting device of the utility model.

[0018] Figure 5 This is an enlarged view of the structure of part B in a coal mine goaf grouting device of the utility model.

[0019] Figure 6 This is an enlarged view of the C-section structure in a coal mine goaf grouting device of the utility model.

[0020] In the attached figure:

[0021] 1. Grouting pipe; 2. Top pipe; 3. Bottom pipe; 4. Middle pipe; 5. Air flow channel; 6. Hollow support plate; 7. Convex frame; 8. Connecting plate; 9. Air port; 10. Reinforcement rib plate; 11. Fixing plate; 12. Air pipe; 7.1. Air vent. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The utility model provides a technical solution for solving the existing problems raised in the background technology.

[0024] Combined with attachment Figure 1 、 5 , it can be known that the equipment includes a casing structure, a grouting pipe 1 is provided in the casing structure, the casing structure includes a top pipe 2, a bottom pipe 3 and an intermediate pipe 4, both ends of the bottom pipe 3 and the intermediate pipe 4 are fixed with connecting plates 8, the bottom pipe 3 and the intermediate pipe 4 connecting plates 8 are connected by bolts, an air outlet 9 connected to the air flow channel 5 is opened on one side of the top pipe 2, and reinforcing ribs 10 are fixed between the connecting plates 8 and the outer walls of the top pipe 2, the bottom pipe 3 and the intermediate pipe 4. A fixing plate 11 is fixed on the top of the top pipe 2 for connecting to an external fixed bracket structure, and an air pipe 12 is fixed at the air outlet 9 by bolt connection to facilitate exhaust or communication with an air pump;

[0025] Combined with attachment Figure 2 、 3 , 4, 6, it can be known that air flow channels 5 are opened inside the top tube 2, the bottom tube 3 and the middle tube 4, and a number of hollow support plates 6 are evenly fixed between the two sides of the air flow channel 5. A number of convex frames 7 are fixed on the sides of the top tube 2, the bottom tube 3 and the middle tube 4 near the bottom, and air holes 7.1 are opened on the sides of the convex frames 7. Air holes connected to the air flow channels 5 are opened on the sides of the top tube 2, the bottom tube 3 and the middle tube 4 at the convex frames 7. Air ports 13 are opened at both ends of the middle tube 4 at the air flow channel 5. The top of the top tube 2 and the bottom of the bottom tube 3 at the air flow channel 5 are both sealed. The air flow channels 5 between the top tube 2, the bottom tube 3 and the middle tube 4 are interconnected for easy exhaust.

[0026] The working principle of this application is as follows: when grouting, first determine the specific depth of the goaf according to the survey results, then assemble and fix the top pipe 2, bottom pipe 3 and intermediate pipe 4 with bolts, then fix the top pipe 2 to the external support frame, and then extend the grouting pipe 1 into the inside of the top pipe 2, bottom pipe 3 and intermediate pipe 4 so that its top end can extend out of the bottom end of the bottom pipe 3, and then connect the air pipe 12 to the external air pump, and then grouting can be carried out;

[0027] During grouting, the gas in the goaf will enter the air flow channel 5 through the air holes 7.1 and the vent holes, and will eventually be pumped out by the air pump to facilitate grouting.

[0028] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A grouting device for a coal mine goaf, comprising a casing structure, a grouting pipe (1) being arranged in the casing structure, characterized in that: The sleeve structure comprises a top tube (2), a bottom tube (3) and an intermediate tube (4); an air flow channel (5) is provided inside the top tube (2), the bottom tube (3) and the intermediate tube (4); a plurality of hollow support plates (6) are evenly fixed between the two sides of the air flow channel (5); a plurality of convex frames (7) are fixed near the bottom of the side surfaces of the top tube (2), the bottom tube (3) and the intermediate tube (4); air holes (7.1) are provided on the side surfaces of the convex frames (7); air holes connected to the air flow channel (5) are provided on the side surfaces of the top tube (2), the bottom tube (3) and the intermediate tube (4) at the convex frames (7); connecting plates (8) are fixed at both ends of the bottom tube (3) and the intermediate tube (4); the connecting plates (8) of the bottom tube (3) and the intermediate tube (4) are connected by bolts; an air outlet (9) connected to the air flow channel (5) is provided on one side of the top tube (2).

2. A coal mine goaf grouting device according to claim 1, characterized in that: Both ends of the intermediate tube (4) are provided with air ports (13) at the air flow channel (5), and the top of the top tube (2) and the bottom of the bottom tube (3) are both in a sealed state at the air flow channel (5).

3. A coal mine goaf grouting device according to claim 1, characterized in that: Reinforcement ribs (10) are fixed between the connecting plates (8) and the outer side walls of the top tube (2), the bottom tube (3), and the middle tube (4).

4. A coal mine goaf grouting device according to claim 1, characterized in that: A fixing plate (11) is fixed on the top of the top pipe (2).

5. The coal mine goaf grouting device according to claim 1, characterized in that: An air delivery pipe (12) is fixed to the air outlet (9) via bolt connection.

6. The coal mine goaf grouting device according to claim 1, characterized in that: The air flow channels (5) between the top tube (2), the bottom tube (3) and the middle tube (4) are interconnected.

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