Fixing mechanism for gas extraction pipe in upward borehole

Abstract

The present invention relates to the technical field of gas extraction pipes, and discloses a fixing mechanism for a gas extraction pipe in an ascending borehole, comprising an outer tube component, a sealing component fixedly mounted on the top outer wall of the outer tube component, a limiting component slidably sleeved on the middle outer wall of the outer tube component, and a connecting pipe three arranged around the outer wall of the outer tube component. Through the expansion of an annular airbag, the gap between the outer tube component and the borehole is filled by the annular airbag, so that the gas will not overflow through the gap between the outer tube component and the borehole. Compared with the traditional extraction pipe fixing mechanism, the step of using a hole sealer or a filling material to seal the gap between the outer tube component and the inner wall of the borehole at the orifice is optimized. At the same time, since the sealing component is placed in the middle and lower position of the borehole, the coal seam debris between the outer tube component and the inner wall of the borehole can be limited by the annular airbag, so that the gap between the outer tube component above the annular airbag and the inner wall of the borehole can be filled with the coal seam debris.

Description

Technical Field

[0001] The invention relates to the technical field of gas extraction pipes, in particular to a fixing mechanism for a gas extraction pipe in an ascending borehole. Background Art

[0002] During coal mining, gas accidents are one of the most dangerous natural disasters in coal mine disasters. Currently, the most effective measure to control coal mine gas problems is gas extraction; In coal mines, upward drilling is often used to extract gas from coal seams. Since the density of gas is usually smaller than that of air, gas will accumulate in the upper part of the coal mine. By drilling upward in the upper coal seam, gas can be extracted more effectively and the safety risks caused by gas accumulation can be reduced; Upward drilling refers to the process in which the direction of drilling is upward relative to the horizontal plane, that is, drilling from bottom to top, during the mining of coal mines or other underground mineral resources.

[0003] The basic process of gas extraction is to first drill a hole in the tunnel with a drilling rig, and then insert a gas extraction pipe into the borehole after withdrawing the drill rod and drill bit. The gas extraction pipe must be exposed for a certain distance from the borehole. Then, a sealer or filling material is used to seal the gap between the gas extraction pipe and the inner wall of the borehole at the hole mouth. Finally, the gas extraction equipment is connected to the end of the gas extraction pipe, and the equipment is started to extract gas.

[0004] Most of the existing gas extraction pipes are ordinary straight PVC pipes. In order to improve the efficiency of gas extraction, one end of the gas extraction pipe in the borehole is still some distance away from the bottom of the borehole, that is, the gas extraction pipe does not fill the entire borehole. At this time, the entire gas extraction pipe is only fixed by the sealer at the top of the extraction hole (in the period of time after the PVC pipe is just placed, the gap between the PVC pipe and the inner wall of the extraction hole will not be filled with coal seam debris. At this time, the PVC pipe will slide in the borehole, especially when drilling upward). If the hole is not sealed tightly or under other special circumstances, it is easy for the extraction pipe to slide downward and fall out of the extraction hole, thereby affecting the effect of gas extraction. Summary of the invention

[0005] The present invention provides a gas extraction pipe fixing mechanism in an upward borehole, which solves the problems raised by the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a gas extraction pipe fixing mechanism in an upward borehole, comprising an outer tube component, the top outer wall of the outer tube component is fixedly equipped with a sealing component, the middle outer wall of the outer tube component is slidably sleeved with a limiting component, the outer wall of the outer tube component is surrounded by a connecting pipe three, and the inner wall of the outer tube component is slidably sleeved with an inner tube component.

[0007] As a preferred technical solution of the present invention: the outer tube component includes an outer tube body, the bottom of the outer tube body is provided with a plurality of square grooves in an annular shape, the inner wall of the square groove is provided with a slide groove, and the inner wall of the slide groove is slidably connected with a sealing plate; The sealing plate and the sliding groove are interference fit.

[0008] As a preferred technical solution of the present invention: the sealing component includes a fixed ring, the bottom outer wall of the fixed ring is fixedly equipped with a plurality of rotating seats, the inner wall of the rotating seat is rotatably connected with a plug-in plate, and the outer walls of the plurality of plug-in plates close to the axis of the fixed ring are fixedly equipped with annular air bags.

[0009] As a preferred technical solution of the present invention: the annular airbag is sleeved on the outer wall of the outer tube component, the fixing ring 1 is fixed to the outer wall of the outer tube component by bolts, and one end of the connecting tube 3 is connected to the annular airbag.

[0010] As a preferred technical solution of the present invention: the limiting component includes a fixing ring 2, a plurality of sleeve grooves are opened in a ring shape on the top of the fixing ring 2, a plurality of rotating seats 2 are fixedly assembled on the bottom of the fixing ring 2, an extrusion plate is rotatably connected to the inner wall of the rotating seat 2, a clamping seat is fixedly assembled on the outer edge of the extrusion plate away from the rotating seat 2 and close to the axis of the fixing ring 2, a connecting plate is fixedly assembled on the bottom of the fixing ring 2, a mounting ring is fixedly assembled on the bottom of the connecting plate, a plurality of extrusion airbags are fixedly assembled on the inner wall of the mounting ring, a connecting tube 1 is connected to the top of the extrusion airbag, and a connecting tube 2 is connected to the end of the connecting tube 1 away from the extrusion airbag.

[0011] As a preferred technical solution of the present invention: the connecting pipe 2 and the connecting pipe 3 are connected, the outer walls of the plurality of extrusion airbags and the plurality of extrusion plates are fixedly assembled, the connecting plate is located between the two groups of extrusion plates, the fixing ring 2 is slidably connected through the outer tube body between the sleeve groove and the two groups of square grooves, and the fixing ring 2 and the outer tube body are fixedly assembled by bolts, and the extrusion plate is located on the inner wall of the square groove.

[0012] As a preferred technical solution of the present invention: the inner tube component includes an inner tube body, a conical tube is fixedly installed at the bottom of the inner tube body, a secondary tube is fixedly installed at the bottom of the conical tube, and two sets of sealing rings are fixedly installed on the outer wall of the bottom of the inner tube body.

[0013] As a preferred technical solution of the present invention: the inner tube body is sealed by a sealing ring and the inner wall of the outer tube component, and the diameter of the auxiliary tube is smaller than the diameter of the inner tube body.

[0014] The present invention has the following beneficial effects: 1. The gas extraction pipe fixing mechanism in the upward borehole places the sealing component in the middle and lower position of the borehole, transmits gas to the annular airbag in three directions through the connecting pipe, so that the annular airbag pushes the plug-in plate to rotate with the rotating seat 1 as the axis, so that the end of the plug-in plate away from the rotating seat 1 abuts against the inner wall of the borehole, and after the plug-in plates are rotated, they are in an outward eight-shaped shape, so that when the device moves downward under its own gravity, the end of the plug-in plate away from the rotating seat 1 will be plugged into the inner wall of the borehole, thereby making the device more firmly fixed. On the other hand, the annular airbag is expanded to expand the space between the outer tube component and the borehole. The gap is filled by an annular airbag, so that the gas will not overflow through the gap between the outer tube component and the borehole. Compared with the traditional extraction tube fixing mechanism, the step of using a sealer or filling material to seal the gap between the outer tube component and the inner wall of the borehole at the hole mouth is optimized. At the same time, since the sealing component is placed in the middle and lower position of the borehole, the coal seam debris between the outer tube component and the inner wall of the borehole can be limited by the annular airbag, so that the gap between the outer tube component above the annular airbag and the inner wall of the borehole can be filled with the coal seam debris, further increasing the stability of the outer tube component.

[0015] 2. The fixing mechanism of the gas extraction pipe in the upward borehole has an interference fit between the sealing plate and the slide groove, so that the sealing plate can be fixed to the slide groove, and the sliding card connection between the sealing plate and the slide groove allows a plurality of sealing plates to be assembled arbitrarily according to the use environment. In actual use, if it is necessary to extract gas on one side, a plurality of square grooves on one side of the outer tube body can be sealed by the sealing plate, so that the square grooves on the other side remain open, thereby realizing gas extraction in a specific direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the present invention in use state; Figure 2 This is a schematic diagram of the structure of the inner tube component of the present invention; Figure 3 This is a schematic diagram of the chute structure of the present invention; Figure 4 This is a schematic diagram of the sealing plate structure of the present invention; Figure 5 This is a schematic diagram of the structure of the outer tube component of the present invention; Figure 6 This is a schematic diagram of the sealing component structure of the present invention; Figure 7 It is a schematic diagram of the structure of the limiting component of the present invention; Figure 8 This is a schematic diagram of the connecting plate structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the extruded airbag of the present invention.

[0017] In the figure: 1. outer tube component; 2. sealing component; 3. connecting tube three; 4. limiting component; 5. inner tube component; 101, outer tube body; 102, square groove; 103, slide groove; 104, sealing plate; 201, a fixed ring; 202, a rotating seat; 203, a plug-in board; 204, a ring-shaped airbag; 401, fixed ring 2; 402, sleeve groove; 403, rotating seat 2; 404, extrusion plate; 405, clamping seat; 406, connecting plate; 407, mounting ring; 408, extrusion airbag; 409, connecting pipe 1; 410, connecting pipe 2; 501, inner tube body; 502, conical tube; 503, auxiliary tube; 504, sealing ring. DETAILED DESCRIPTION

[0018] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 - Fig. 9 The fixing mechanism of the gas extraction pipe in the upward borehole comprises an outer tube component 1, the top outer wall of the outer tube component 1 is fixedly equipped with a sealing component 2, the middle outer wall of the outer tube component 1 is slidably sleeved with a limiting component 4, the outer wall of the outer tube component 1 is surrounded by a connecting pipe 3, and the inner wall of the outer tube component 1 is slidably sleeved with an inner tube component 5.

[0020] In a preferred embodiment, the outer tube component 1 includes an outer tube body 101, a plurality of square grooves 102 are formed in an annular manner at the bottom of the outer tube body 101, a slide groove 103 is formed in the inner wall of the square groove 102, and a sealing plate 104 is slidably connected to the inner wall of the slide groove 103; The sealing plate 104 and the slide groove 103 are interference fit.

[0021] In the above structure, the sealing plate 104 and the slide groove 103 are interference fit, so that the sealing plate 104 can be fixed to the slide groove 103, and the sealing plate 104 and the slide groove 103 are slidingly connected, so that a plurality of sealing plates 104 can be assembled arbitrarily according to the use environment. In actual use, if it is necessary to extract gas in one direction, a plurality of square grooves 102 on one side of the outer tube body 101 can be sealed by the sealing plate 104, so that the square grooves 102 on the other side remain open, thereby realizing gas extraction in a specific direction.

[0022] In a preferred embodiment: the sealing component 2 includes a fixed ring 201, the bottom outer wall of the fixed ring 201 is fixedly equipped with a plurality of rotating seats 202, the inner wall of the rotating seat 202 is rotatably connected to a plug-in board 203, and the outer walls of the plurality of plug-in boards 203 close to the axis of the fixed ring 201 are fixedly equipped with annular airbags 204.

[0023] In a preferred embodiment: the annular airbag 204 is sleeved on the outer wall of the outer tube component 1, the fixing ring 1 201 is fixed to the outer wall of the outer tube component 1 by bolts, and one end of the connecting tube 3 3 is connected to the annular airbag 204.

[0024] In the above structure, the outer wall of the plurality of plug-in plates 203 close to the axis of the fixing ring 201 is connected to the annular airbag 204, so that when the annular airbag 204 expands, the annular airbag 204 can push the plug-in plates 203 to rotate with the rotating seat 202 as the axis, thereby rotating the plug-in plates 203 outward, and the fixing ring 201 is fixed to the outer wall of the outer tube component 1 by bolts, so that the height of the sealing component 2 located on the outer wall of the outer tube component 1 can be changed according to the height position of the drilled hole; When the device is in use, the sealing component 2 is placed in the middle and lower position of the drill hole, and gas is transmitted to the annular airbag 204 through the connecting pipe 3, so that the annular airbag 204 pushes the plug-in board 203 to rotate with the rotating seat 1 202 as the axis, so that the end of the plug-in board 203 away from the rotating seat 1 202 abuts against the inner wall of the drill hole, and after the plug-in boards 203 are rotated, they are in an outward-facing eight-shaped shape, so that when the device moves downward under its own gravity, the end of the plug-in board 203 away from the rotating seat 1 202 will be plugged into the inner wall of the drill hole, thereby making the device more firmly fixed. On the other hand, the expansion of the annular airbag 204 makes the outer tube component 1 and the drill hole The gap between them is filled by the annular airbag 204, so that the gas will not overflow through the gap between the outer tube component 1 and the borehole. Compared with the traditional extraction pipe fixing mechanism, the step of using a sealer or filling material to seal the gap between the outer tube component 1 and the inner wall of the borehole at the hole mouth is optimized. At the same time, since the sealing component 2 is placed in the middle and lower position of the borehole, the coal seam debris between the outer tube component 1 and the inner wall of the borehole can be limited by the annular airbag 204, so that the gap between the outer tube component 1 above the annular airbag 204 and the inner wall of the borehole can be filled with the coal seam debris, further increasing the stability of the outer tube component 1.

[0025] In a preferred embodiment: the limiting component 4 includes a second fixing ring 401, a plurality of sleeve grooves 402 are provided in an annular manner on the top of the second fixing ring 401, a plurality of rotating seats 403 are fixedly assembled on the bottom of the second fixing ring 401, an inner wall of the second rotating seat 403 is rotatably connected with an extrusion plate 404, an outer edge of the extrusion plate 404 is fixedly assembled with a clamping seat 405 away from the rotating seat 403 and close to the axis of the second fixing ring 401, a connecting plate 406 is fixedly assembled on the bottom of the second fixing ring 401, a mounting ring 407 is fixedly assembled on the bottom of the connecting plate 406, a plurality of extrusion airbags 408 are fixedly assembled on the inner wall of the mounting ring 407, a connecting tube 1 409 is connected to the top of the extrusion airbag 408, and a connecting tube 2 410 is connected to the end of the connecting tube 1 409 away from the extrusion airbag 408.

[0026] In a preferred embodiment: connecting tube 2 410 is connected to connecting tube 3 3 , a plurality of extrusion airbags 408 and the outer walls of a plurality of extrusion plates 404 are fixedly assembled, the connecting plate 406 is located between the two groups of extrusion plates 404 , the fixing ring 2 401 is slidably sleeved through the sleeve groove 402 and the outer tube body 101 between the two groups of square grooves 102 , and the fixing ring 2 401 and the outer tube body 101 are fixedly assembled by bolts, and the extrusion plate 404 is located on the inner wall of the square groove 102 .

[0027] In the above structure, the outer walls of a plurality of extrusion airbags 408 and a plurality of extrusion plates 404 are fixedly assembled, so that after the inner tube component 5 is placed on the inner wall of the outer tube component 1, the extrusion plate 404 is pushed by the end of the inner tube component 5, so that the extrusion plate 404 pushes the extrusion airbag 408, and the extrusion airbag 408 is connected with the connecting tube 3 3 through the connecting tube 1 409 and the connecting tube 2 410, so that the gas in the inner cavity of the plurality of extrusion airbags 408 is transmitted to the inner cavity of the annular airbag 204, so that the annular airbag 204 is expanded, and on the other hand, the clamping seat 405 is fixedly assembled on the outer edge of the extrusion plate 404 away from the rotating seat 2 403 and close to the axis of the fixing ring 2 401, so that the outer edge of the end of the inner tube component 5 can be limited by the clamping seat 405, so that the inner tube component 5 is limited by the distance moved downward by the inner wall of the outer tube component 1, thereby realizing the fixing of the inner tube component 5 on the inner wall of the outer tube component 1; On the other hand, by fixing the fixing ring 2 401 and the outer tube body 101 with bolts, the limiting component 4 can be moved at the height of the outer wall of the outer tube component 1, and the connecting pipe 3 3 is arranged around the outer wall of the outer tube component 1, so that the sealing component 2 and the limiting component 4 can be connected through the connecting pipe 3 3 when the height is changed.

[0028] In a preferred embodiment, the inner tube component 5 includes an inner tube body 501 , a conical tube 502 is fixedly mounted on the bottom of the inner tube body 501 , a secondary tube 503 is fixedly mounted on the bottom of the conical tube 502 , and two sets of sealing rings 504 are fixedly mounted on the outer wall of the bottom of the inner tube body 501 .

[0029] In a preferred embodiment, the inner tube body 501 is sealed by the sealing ring 504 and the inner wall of the outer tube component 1 , and the diameter of the secondary tube 503 is smaller than the diameter of the inner tube body 501 .

[0030] Working principle: In actual use, if it is necessary to extract gas in one direction, the sealing plate 104 can be used to seal the square grooves 102 on one side of the outer tube body 101, so that the square grooves 102 on the other side remain open, thereby achieving gas extraction in a specific direction; Before placing the outer tube component 1, the sealing component 2, and the limiting component 4 of the device in the drill hole, press the annular airbag 204 to discharge the gas in the inner cavity of the annular airbag 204, so that the plug-in board 203 and the outer tube component 1 fit as closely as possible, and then place the outer tube component 1 in the drill hole; The inner tube component 5 is placed on the inner wall of the outer tube body 101 through the top of the outer tube component 1, and the extrusion plate 404 is pushed through the end of the auxiliary tube 503, so that the extrusion plate 404 pushes the extrusion airbag 408, and the extrusion airbag 408 is connected with the connection tube 3 3 through the connection tube 1 409 and the connection tube 2 410, so that the gas in the inner cavity of the plurality of extrusion airbags 408 is transmitted to the inner cavity of the annular airbag 204, so that the annular airbag 204 is expanded, and the outer wall of the plurality of plug-in plates 203 close to the axis of the fixing ring 1 201 is The annular airbag 204 is connected to the annular airbag 204. When the annular airbag 204 expands, the annular airbag 204 can push the plug-in board 203 to rotate with the rotating seat 202 as the axis, thereby rotating the plug-in board 203 outward, so that the end of the plug-in board 203 away from the rotating seat 202 abuts against the inner wall of the drill hole. When the device moves downward under its own gravity, the end of the plug-in board 203 away from the rotating seat 202 will be plugged into the inner wall of the drill hole, thereby making the device more firmly fixed; On the other hand, the annular airbag 204 is expanded to fill the gap between the outer tube component 1 and the borehole through the annular airbag 204, so that the gas will not overflow through the gap between the outer tube component 1 and the borehole. Compared with the traditional extraction pipe fixing mechanism, the step of using a hole sealer or a filling material to seal the gap between the outer tube component 1 and the inner wall of the borehole at the hole opening is optimized. At the same time, since the sealing component 2 is placed in the middle and lower position of the borehole, the coal seam debris between the outer tube component 1 and the inner wall of the borehole can be limited by the annular airbag 204, so that the gap between the outer tube component 1 above the annular airbag 204 and the inner wall of the borehole can be filled with the coal seam debris, further increasing the stability of the outer tube component 1. On the other hand, the clamping seat 405 is fixedly assembled on the outer edge of the extrusion plate 404 away from the rotating seat 2 403 and close to the axis of the fixing ring 2 401, so that the outer edge of the end of the inner tube component 5 can be limited by the clamping seat 405, and then the inner tube component 5 is limited by the distance moved downward from the inner wall of the outer tube component 1, so that the inner tube component 5 is fixed on the inner wall of the outer tube component 1; By providing the sealing ring 504 , the gap between the inner tube body 501 and the outer tube body 101 is filled by the sealing ring 504 .

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas extraction pipe fixing mechanism in an upward borehole, comprising an outer pipe component (1), characterized in that: The top outer wall of the outer tube component (1) is fixedly equipped with a sealing component (2), the middle outer wall of the outer tube component (1) is slidably sleeved with a limiting component (4), a connecting pipe three (3) is arranged around the outer wall of the outer tube component (1), and the inner wall of the outer tube component (1) is slidably sleeved with an inner tube component (5).

2. The gas extraction pipe fixing mechanism in the upward borehole according to claim 1 is characterized in that: The outer tube component (1) comprises an outer tube body (101), a plurality of square grooves (102) are provided in an annular shape at the bottom of the outer tube body (101), a sliding groove (103) is provided on the inner wall of the square groove (102), and a sealing plate (104) is slidably engaged with the inner wall of the sliding groove (103); The sealing plate (104) and the sliding groove (103) are interference fit.

3. The gas extraction pipe fixing mechanism in the upward borehole according to claim 1 is characterized in that: The sealing component (2) comprises a fixing ring (201), a plurality of rotating seats (202) being fixedly mounted on the bottom outer wall of the fixing ring (201), a plug-in plate (203) being rotatably connected to the inner wall of the rotating seat (202), and an annular airbag (204) being fixedly mounted on the outer wall of the plurality of plug-in plates (203) close to the axis of the fixing ring (201).

4. The gas extraction pipe fixing mechanism in the upward borehole according to claim 3 is characterized in that: The annular airbag (204) is sleeved on the outer wall of the outer tube component (1), the fixing ring 1 (201) is fixedly abutted against the outer wall of the outer tube component (1) by means of bolts, and one end of the connecting tube 3 (3) is connected to the annular airbag (204).

5. The gas extraction pipe fixing mechanism in the upward borehole according to claim 1 is characterized in that: The limiting component (4) comprises a second fixing ring (401), a plurality of sleeve grooves (402) are formed in an annular manner on the top of the second fixing ring (401), a plurality of second rotating seats (403) are fixedly assembled on the bottom of the second fixing ring (401), an inner wall of the second rotating seat (403) is rotatably connected with an extrusion plate (404), an outer edge of the extrusion plate (404) away from the second rotating seat (403) and close to the axis of the second fixing ring (401) is fixedly assembled with a clamping seat (405), a connecting plate (406) is fixedly assembled on the bottom of the second fixing ring (401), a mounting ring (407) is fixedly assembled on the bottom of the connecting plate (406), a plurality of extrusion airbags (408) are fixedly assembled on the inner wall of the mounting ring (407), a connecting tube (409) is connected to the top of the extrusion airbag (408), and a connecting tube (410) is connected to the end of the connecting tube (409) away from the extrusion airbag (408).

6. The gas extraction pipe fixing mechanism in the upward borehole according to claim 5 is characterized in that: The second connecting pipe (410) is connected to the third connecting pipe (3), the outer walls of the plurality of extrusion airbags (408) and the plurality of extrusion plates (404) are fixedly assembled, the connecting plate (406) is located between the two groups of extrusion plates (404), the second fixing ring (401) is slidably sleeved through the sleeve groove (402) and the outer tube body (101) between the two groups of square grooves (102), and the second fixing ring (401) and the outer tube body (101) are fixedly assembled by bolts, and the extrusion plate (404) is located on the inner wall of the square groove (102).

7. The gas extraction pipe fixing mechanism in the upward borehole according to claim 1 is characterized in that: The inner tube component (5) comprises an inner tube body (501), a conical tube (502) is fixedly mounted on the bottom of the inner tube body (501), a secondary tube (503) is fixedly mounted on the bottom of the conical tube (502), and two sets of sealing rings (504) are fixedly mounted on the outer wall of the bottom of the inner tube body (501).

8. The gas extraction pipe fixing mechanism in the upward borehole according to claim 7 is characterized in that: The inner tube body (501) is sealed by a sealing ring (504) and the inner wall of the outer tube component (1); the diameter of the secondary tube (503) is smaller than the diameter of the inner tube body (501).

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