Coal mine gas extraction hole sealing pipe column

Abstract

The utility model belongs to the technical field of hole sealing pipe columns, and particularly relates to a coal mine gas extraction hole sealing pipe column which comprises a pipe column body and a sealing belt. The seepage cloth belt is distributed on the outer side of the sealing belt in a sectional mode, grouting operation is carried out through a grouting pipe at one end of the sealing belt, an annular guide pipe is arranged in the sealing belt, secondary grouting operation is carried out in the mode that a branch pipe on the outer side of the annular guide pipe is in butt joint with an inner partition belt in the sealing belt, and the multiple-grouting sealing effect is achieved. And the sealing block is located in the right end of the sealing belt, an electric expansion piece is further arranged in the sealing belt, the sealing block is tightly jacked through a push frame at the end to deform, the plugging range is enlarged, and the electric expansion piece is used for pre-sealing a tubular column and a drill hole and further used for enhancing the sealing performance for multiple times. According to the utility model, a pre-sealing effect can be formed during installation, the sealing performance can be enhanced for multiple times, in addition, grouting operation can be carried out for multiple times, defects can be checked and repaired, gaps can be blocked in time, and safe operation of coal mine gas extraction operation is effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing pipe columns, in particular to a coal mine gas extraction sealing pipe column. Background Art

[0002] Sealing pipe strings are pipes used to seal abandoned passages or mining spaces in coal mines. They have good sealing properties, are pressure-resistant, and are corrosion-resistant. They are important tools for ventilation and gas drainage in coal mines.

[0003] Currently, in actual applications, existing sealing columns often use grouting to seal holes and cracks. However, during coal mine gas extraction operations, the rock will vibrate due to movement, which in turn causes the cracks to continue to widen, making the sealing effect worse. At this point, the structure is already fixed, making secondary grouting difficult. This can easily affect normal extraction operations and even cause safety accidents.

[0004] In order to solve the above problems, this application proposes a coal mine gas extraction sealing pipe string. Utility Model Content

[0005] The purpose of the utility model is to provide a coal mine gas extraction sealing pipe string, which solves the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is a coal mine gas extraction and sealing pipe column, comprising: a pipe column and a sealing belt; a seepage belt, which is distributed in sections on the outside of the sealing belt, and grouting operations are performed through a grouting pipe at one end of the sealing belt; an annular conduit is provided inside the sealing belt, and a secondary grouting operation is performed through a branch pipe on the outside of the sealing belt to connect with an inner partition belt inside the sealing belt, thereby achieving the effect of multiple grouting and sealing; a sealing block, which is located inside the right end of the sealing belt; an electric expander is also provided inside the sealing belt, and the sealing block is pressed against the push frame at the end to deform it and increase the sealing range, and is used for pre-sealing the pipe column and the borehole, and is also used for multiple times to enhance the sealing performance.

[0008] Furthermore, an inflation unit is provided inside the lower end of the sealing belt, which is opposite to the grouting pipe and is used to inflate the sealing belt to expand it.

[0009] Furthermore, a first control valve is provided on the outside of the inlet end of the grouting pipe, and a second control valve is provided on the outside of one end of the branch pipe adjacent to the annular conduit, both of which are used to control the grouting flow state.

[0010] Furthermore, a boss is provided on the outer side of the pipe column for installing an electric expander, which is located in the middle area inside the sealing belt.

[0011] Furthermore, a connecting belt is provided on the inner side of the sealing block and is connected to the junction of the sealing belt and the pipe column.

[0012] Furthermore, a positioning ring is provided on the outer side of one end of the pipe string for recording the inlet position of the grouting pipe, which is convenient for subsequent grouting operations.

[0013] Furthermore, the branch pipes are circumferentially distributed on the outside of the annular conduit to increase the number of grouting outlets and ensure that the enlarged gaps are sealed in the first place.

[0014] The utility model has the following beneficial effects:

[0015] The utility model can not only reduce the occupied space and facilitate the placement of the sealing block through the cooperation of the push frame and the electric expansion device, but also form a variable fixed seal. By squeezing and deforming the sealing block, the gap is blocked over a large area, forming a pre-sealing effect. Moreover, the electric expansion device can be used to push forward multiple times during the coal mine gas extraction operation to achieve the effect of strengthening the seal, making the extraction operation more stable, reducing the probability of gas leakage and improving the safety of the operation.

[0016] The utility model can form a staged grouting operation mode during the coal mine gas extraction operation by adding an inner spacer belt and an annular guide tube. This can not only realize multiple grouting operations to improve the sealing performance, but also can timely seal the enlarged gap to achieve the effect of detecting defects and filling leaks. After the gap is found to be larger, the normal sealing can be restored as soon as possible to ensure the safe conduct of the extraction operation.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. 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.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the sealing bag of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal planar structure of the sealing bag of the present invention;

[0022] Figure 4 This is a partial enlarged structural diagram of part A of the present utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] In the figure: 1. pipe column; 2. sealing tape; 3. seepage tape; 4. inflation unit; 5. grouting pipe; 6. first control valve; 7. positioning ring; 8. inner spacer; 9. annular conduit; 10. branch pipe; 11. boss; 12. electric expansion joint; 13. sealing block; 14. push frame; 15. second control valve; 16. connecting tape. DETAILED DESCRIPTION

[0025] 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.

[0026] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] See also Figure 1-4 As shown, the utility model is a coal mine gas extraction sealing pipe string, comprising: a pipe string 1 and a sealing belt 2;

[0028] The seepage belt 3 is distributed in sections outside the sealing belt 2. Grouting is performed through the grouting pipe 5 at one end of the sealing belt 2. An annular conduit 9 is provided inside the sealing belt 2. The branch pipe 10 outside the annular conduit 9 connects to the inner spacer 8 inside the sealing belt 2 to perform secondary grouting, thereby achieving the effect of multiple grouting and sealing. An inflation unit 4 is provided inside the lower end of the sealing belt 2, opposite to the grouting pipe 5, for inflating the sealing belt 2 to expand it.

[0029] The sealing block 13 is located inside the right end of the sealing belt 2. An electric expander 12 is also provided inside the sealing belt 2. The push frame 14 at the end pushes the sealing block 13 to deform it and increase the sealing range. It is used to pre-seal the pipe column 1 and the borehole, and is also used to enhance the sealing performance multiple times. A first control valve 6 is provided on the outside of the inlet end of the grouting pipe 5, and a second control valve 15 is provided on the outside of one end of the branch pipe 10 adjacent to the annular conduit 9, both of which are used to control the grouting flow state.

[0030] This embodiment provides a sealing pipe structure that can seal gaps multiple times. The deformation characteristics of the sealing block 13 can be used to achieve multiple deformations to enhance the sealing effect. Combined with the segmented seepage belt 3, under the action of multiple annular conduits 9 and branch pipes 10, the function of multiple grouting operations can be achieved, which can not only strengthen the seal in the first place, but also detect and fill in the gaps to achieve a high sealing effect.

[0031] Among them, a boss 11 is provided on the outside of the pipe column 1 for installing an electric expander 12, which is located in the middle area inside the sealing belt 2. A connecting belt 16 is provided on the inner side of the sealing block 13, which is connected to the junction of the sealing belt 2 and the pipe column 1. When not in use, the electric expander 12 is retracted. Under the transfer action of the connecting belt 12, the sealing block 13 is horizontally stored on one side of the inner side of the sealing belt 2, and the limited position is convenient for sealing operations. It is also used to reduce the occupied space and facilitate carrying and transportation as well as installation and use of the pipe column 1.

[0032] Among them, a positioning ring 7 is provided on the outside of one end of the pipe column 1 to record the entrance position of the grouting pipe 5, which is convenient for subsequent grouting operations, making the subsequent grouting operation pipeline docking simpler and more convenient, and making corresponding adjustment measures for the gap in time.

[0033] Among them, the branch pipes 10 are circumferentially distributed on the outside of the annular conduit 9 to increase the number of grouting outlets and ensure that the enlarged gaps are sealed in the first time to form a seal.

[0034] It can be understood that the utility model can form a pre-sealing effect during installation and has the function of strengthening the sealing multiple times. In addition, it can also perform multiple grouting operations, which can not only check for deficiencies and leaks, but also seal gaps in time, effectively ensuring the safety of coal mine gas extraction operations.

[0035] A specific application of the operating process of this embodiment is: when in use, first push the push frame 14 through the electric telescopic device 12 to deform the sealing block 13 from the horizontal state to the vertical state to increase the cross-section and expand the blocking range. At this time, the pipe string 1 can be directly sealed with the inner wall of the borehole to achieve a pre-sealing effect, and during subsequent use, the sealing block 13 can be tightened multiple times in this way to achieve the effect of strengthening the seal in stages; further, grouting is performed through the grouting pipe 5 into the inner spacer 8 to spread it outward to penetrate into the interior of the ore and rock gaps to achieve the effect of sealing and reinforcement. When the seal is found to be loose, the annular conduit 9 and the branch pipe 10 are used for secondary grouting operations, which can form a seal and reinforcement at the first time of leakage, so that the pipe string 1 can still maintain a stable use effect in an environment where the ore and rock vibrate.

[0036] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A coal mine gas extraction sealing pipe string, characterized in that: include: A pipe column (1) and a sealing tape (2); The seepage belt (3) is distributed in sections outside the sealing belt (2), and grouting is performed through a grouting pipe (5) at one end of the sealing belt (2). An annular conduit (9) is provided inside the sealing belt (2), and a secondary grouting operation is performed by connecting the inner spacer belt (8) inside the sealing belt (2) through a branch pipe (10) outside the annular conduit (9), thereby achieving a multiple grouting sealing effect. The sealing block (13) is located inside the right end of the sealing belt (2). An electric telescoping device (12) is also provided inside the sealing belt (2). The pushing frame (14) at the end is used to press the sealing block (13) to deform it and increase the sealing range. The sealing block (13) is used for pre-sealing the pipe column (1) and the borehole, and is also used to enhance the sealing performance multiple times.

2. The coal mine gas extraction sealing string according to claim 1, characterized in that: An air-inflating unit (4) is provided inside the lower end of the sealing belt (2), which is opposite to the grouting pipe (5) and is used to inflate the sealing belt (2) to expand it.

3. The coal mine gas extraction sealing string according to claim 1, characterized in that: A first control valve (6) is provided on the outside of the inlet end of the grouting pipe (5), and a second control valve (15) is provided on the outside of one end of the branch pipe (10) adjacent to the annular conduit (9), both of which are used to control the grouting flow state.

4. The coal mine gas extraction sealing pipe string according to claim 1, characterized in that: The outer side of the pipe column (1) is provided with a boss (11) for installing an electric expansion joint (12), which is located in the middle area inside the sealing belt (2).

5. The coal mine gas extraction sealing pipe string according to claim 1, characterized in that: A connecting belt (16) is provided on the inner side of the sealing block (13) and is connected to the junction of the sealing belt (2) and the pipe column (1).

6. The coal mine gas extraction sealing string according to claim 1, characterized in that: A positioning ring (7) is provided on the outside of one end of the pipe column (1) for recording the inlet position of the grouting pipe (5) to facilitate subsequent grouting operations.

7. The coal mine gas extraction sealing string according to claim 1, characterized in that: The branch pipes (10) are circumferentially distributed on the outer side of the annular conduit (9) to increase the number of grouting outlets and ensure that the enlarged gap is sealed in the first place to form a seal.

Images