Coal mine gas extraction hole sealing device

Abstract

The utility model discloses a coal mine gas extraction hole sealing device which comprises an inner through hole, an inner pipe extending in the length direction of the inner through hole is arranged in the inner through hole, two sealing baffle rings are arranged between the inner through hole and the inner pipe, and protruding frames are arranged on the opposite faces of the two sealing baffle rings. The inner ring is located on the outer side of the inner pipe, an inner supporting frame corresponding to the convex frame is arranged on the inner ring, and the convex frame is connected with the inner supporting frame through a connecting rubber body; sealing colloid is filled between the inner through hole and the inner pipe, and the elasticity modulus of the sealing colloid is larger than that of the connecting colloid. The sealing structure has the beneficial effects that the low elastic modulus of the connecting rubber body is utilized, the buffering effect is achieved, when the inner pipe vibrates or displaces, the connecting rubber body can firstly absorb deformation, pressure on the sealing rubber body is reduced, good sealing performance is kept, and the service life of a sealing system is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of gas extraction, and in particular to a coal mine gas extraction hole sealing device. Background Art

[0002] Coal mine gas extraction holes are crucial for safe coal mine production. They are used to effectively extract gas from underground coal mines to prevent explosions caused by excessive gas concentrations. Gas extraction holes are drilled in coal seams or gas-rich areas using drilling technology, and the gas is transported to the surface through pipelines. During the extraction process, extraction pipes, air pumps, compressors, and other equipment are installed. Safety features such as gas concentration monitoring, exhaust valves, and pressure control devices are also implemented to ensure safe operation.

[0003] However, the existing coal mine gas extraction holes are mostly sealed with a single sealing material. Since the inner tube vibrates during use, it is easy for the sealing material between the extraction space and the inner tube to fatigue or become dislocated, which can easily lead to seal failure. Utility Model Content

[0004] The purpose of the present invention is to provide a coal mine gas extraction hole sealing device in order to solve the above problems, as described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides a coal mine gas extraction hole sealing device, comprising an inner through hole, an inner tube extending along the length direction of the inner through hole, two sealing retaining rings arranged between the inner through hole and the inner tube, and protrusions arranged on the facing surfaces of the two sealing retaining rings;

[0007] It also includes an inner ring located outside the inner tube, and an inner support frame corresponding to the protrusion is provided on the inner ring, and the protrusion and the inner support frame are connected by a connecting colloid; the inner through hole and the inner tube are filled with a sealing colloid, and the elastic modulus of the sealing colloid is greater than the elastic modulus of the connecting colloid.

[0008] As an optional solution of the technical solution of this application document, the sealing colloid is drum-shaped on the side away from the inner tube, and the middle part is arranged away from the inner tube.

[0009] As an optional solution to the technical solution of this application document, the cross-section of the protrusion is triangular, and its tip is set in an arc shape, and the inner support frame is a V-shaped structure corresponding to the protrusion.

[0010] As an optional solution to the technical solution of this application document, a skeleton frame is provided on the outside of the inner ring, the outer wall of the skeleton frame is drum-shaped, both ends of the skeleton frame are fixedly connected to the inner ring, and the middle part is arranged away from the inner ring.

[0011] As an optional solution to the technical solution of this application document, the area of the holes on the skeleton frame is larger than the holes on the inner ring.

[0012] As an optional solution to the technical solution of this application document, a connecting ring is connected to the sealing ring near the opening of the inner through hole, and a glue injection flange frame is provided on the outer side of the connecting ring. The glue injection flange frame is provided with a filling hole connected to the sealing colloid.

[0013] As an optional solution to the technical solution of this application document, a fixed flange is installed on the outside of the connecting ring, and the fixed flange is connected to the injection flange frame by bolts. A sealing ring is connected between the fixed flange and the injection flange frame.

[0014] As an optional solution of the technical solution of this application document, one end of the connecting ring extending into the sealing retaining ring is connected to a skeleton with a through hole.

[0015] The beneficial effects are:

[0016] The lower elastic modulus of the connecting colloid plays a buffering role. When the inner tube vibrates or moves, the connecting colloid can first absorb the deformation, reduce the pressure on the sealing colloid, maintain good sealing performance, and extend the service life of the sealing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 2 It is a structural diagram of the inner ring in the utility model;

[0020] Figure 3 It is a structural diagram of the skeleton frame of the present invention.

[0021] The following are the descriptions of the reference numerals:

[0022] 1. Inner through hole; 2. Inner tube; 3. Sealing retaining ring; 301. Boss; 4. Inner ring; 401. Inner support frame; 5. Connecting colloid; 6. Frame; 7. Sealing colloid; 8. Connecting ring; 801. Fixing flange; 802. Glue injection flange frame. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] First embodiment:

[0025] See also Figure 1-Figure 3 As shown, the utility model provides a coal mine gas extraction hole sealing device, comprising an inner through hole 1, an inner tube 2 extending along the length direction of the inner through hole 1 is provided inside the inner through hole 1, two sealing retaining rings 3 are provided between the inner through hole 1 and the inner tube 2, the two sealing retaining rings 3 are distributed along the length direction of the inner tube 2, the two sealing retaining rings 3 are arranged at intervals, and the facing surfaces of the two sealing retaining rings 3 are provided with protrusions 301;

[0026] It also includes an inner ring 4 located outside the inner tube 2, and an inner support frame 401 corresponding to the protrusion 301 is provided on the inner ring 4, and the protrusion 301 and the inner support frame 401 are connected by a connecting colloid 5, and the protrusion 301 and the inner support frame 401 are connected by a connecting colloid 5;

[0027] When the cam 301 is in the closed position, the sealing member 7 is tightened, and the sealing member 7 is tightened, so that the sealing member 7 is tightened.

[0028] Furthermore, the sealing colloid 7 is drum-shaped on the side away from the inner tube 2 , and the middle part thereof is arranged away from the inner tube 2 , so as to better fasten and install the inner tube 2 .

[0029] The second embodiment is different from the first embodiment in that:

[0030] The cross section of the protrusion 301 is triangular, and its tip is set in an arc shape. The inner support frame 401 is a V-shaped structure corresponding to the protrusion 301. With this arrangement, when the device is in use, when the inner tube 2 vibrates or moves, the inner tube 2 pulls the sealing retaining ring 3, and the sealing retaining ring 3 produces relative displacement. When the protrusion 301 moves toward the inner support frame 401, the tip of the protrusion 301 approaches the inner support frame 401, and the opening of the inner support frame 401 becomes larger, thereby squeezing the sealing colloid 7, which can better seal the inner through hole 1 and the inner tube 2. Furthermore, when the protrusion 301 moves away from the inner support frame 401, the elastic deformation of the connecting colloid 5 between the protrusion 301 and the inner support frame 401 is used to reduce the elastic deformation of the sealing colloid 7, thereby avoiding the overall deformation of the sealing colloid 7 and ensuring the sealing between the inner through hole 1 and the inner tube 2.

[0031] A skeleton frame 6 is provided on the outside of the inner ring 4, and the outer wall of the skeleton frame 6 is drum-shaped. Both ends of the skeleton frame 6 are fixedly connected to the inner ring 4, and the middle part is arranged away from the inner ring 4. The drum-shaped skeleton frame 6 is used to form a support for the sealing colloid 7. In the structure of the skeleton frame 6, the diameter at the maximum position of the skeleton frame 6 is matched with the inner diameter clearance of the inner through hole 1, which is convenient for arranging the sealing ring 3, the inner ring 4, the connecting colloid 5, and the skeleton frame 6 in the inner through hole 1. Furthermore, the hole area on the skeleton frame 6 is larger than the hole area on the inner ring 4, so as to facilitate the fluidity of the sealing colloid 7 between the inner through hole 1 and the inner tube 2, thereby ensuring the filling effect of the sealing colloid 7 between the inner through hole 1 and the inner tube 2.

[0032] The third embodiment is different from the first embodiment in that:

[0033] A connecting ring 8 is connected to the sealing retaining ring 3 near the opening of the inner through hole 1. A glue injection flange frame 802 is provided on the outer side of the connecting ring 8. A filling hole connected to the sealing colloid 7 is provided on the glue injection flange frame 802. During construction, glue can be injected between the inner through hole 1 and the inner tube 2 through the filling hole to achieve elastic sealing of the inner tube 2. There can be multiple filling holes to improve the glue injection efficiency. The sealing glue injection material can be polyurethane glue injection material or epoxy resin glue.

[0034] Furthermore, a fixed flange 801 is installed on the outside of the connecting ring 8, and the fixed flange 801 is connected to the injection flange frame 802 by bolts. A sealing ring is connected between the fixed flange 801 and the injection flange frame 802, and the sealing ring is used to achieve sealing between the fixed flange 801 and the injection flange frame 802. Furthermore, a sealing plug corresponding to the filling hole is provided on the sealing ring, so as to tighten the sealing hole and achieve better sealing effect. In a preferred embodiment, one end of the connecting ring 8 extending into the sealing retaining ring 3 is connected to a skeleton with a through hole, and the skeleton is used to improve the connection effect between the connecting ring 8 and the sealing retaining ring 3.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A coal mine gas extraction hole sealing device, comprising an inner through hole (1), wherein an inner tube (2) extending along the length direction of the inner through hole (1) is provided inside the inner through hole (1), characterized in that: Two sealing retaining rings (3) are provided between the inner through hole (1) and the inner tube (2), and facing surfaces of the two sealing retaining rings (3) are provided with protrusions (301); It also includes an inner ring (4) located outside the inner tube (2), the inner ring (4) being provided with an inner support frame (401) corresponding to the convex frame (301), and the convex frame (301) and the inner support frame (401) being connected via a connecting colloid (5); A sealing colloid (7) is filled between the inner through hole (1) and the inner tube (2), and the elastic modulus of the sealing colloid (7) is greater than the elastic modulus of the connecting colloid (5).

2. A coal mine gas extraction hole sealing device according to claim 1, characterized in that: The sealing colloid (7) is in a drum shape on the side away from the inner tube (2), and the middle part thereof is arranged away from the inner tube (2).

3. A coal mine gas extraction hole sealing device according to claim 2, characterized in that: The cross section of the protrusion (301) is triangular, and the tip thereof is arranged in an arc shape. The inner support frame (401) is a V-shaped structure corresponding to the protrusion (301).

4. A coal mine gas extraction hole sealing device according to claim 3, characterized in that: A frame (6) is provided on the outside of the inner ring (4), the outer wall of the frame (6) is drum-shaped, both ends of the frame (6) are fixedly connected to the inner ring (4), and the middle part is arranged away from the inner ring (4).

5. A coal mine gas extraction hole sealing device according to claim 4, characterized in that: The area of the holes on the skeleton frame (6) is larger than the area of the holes on the inner ring (4).

6. A coal mine gas extraction hole sealing device according to claim 1, characterized in that: A connecting ring (8) is connected to the sealing retaining ring (3) near the opening of the inner through hole (1), and a glue injection flange frame (802) is provided on the outside of the connecting ring (8). The glue injection flange frame (802) is provided with a filling hole connected to the sealing colloid (7).

7. A coal mine gas extraction hole sealing device according to claim 6, characterized in that: A fixed flange (801) is installed on the outside of the connecting ring (8), and the fixed flange (801) is connected to the glue injection flange frame (802) through bolts. A sealing ring is connected between the fixed flange (801) and the glue injection flange frame (802).

8. A coal mine gas extraction hole sealing device according to claim 7, characterized in that: One end of the connecting ring (8) extending into the sealing retaining ring (3) is connected to a skeleton with a through hole.

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