CN219081540U - Coal mine gas extraction hole plugging device - Google Patents
Coal mine gas extraction hole plugging device Download PDFInfo
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- CN219081540U CN219081540U CN202320109732.9U CN202320109732U CN219081540U CN 219081540 U CN219081540 U CN 219081540U CN 202320109732 U CN202320109732 U CN 202320109732U CN 219081540 U CN219081540 U CN 219081540U
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Abstract
The utility model discloses a coal mine gas extraction hole plugging device which is arranged in an extraction hole, wherein the extraction hole is arranged on a roadway wall; the grouting device comprises a drainage pipe, a first sealing bag, a second sealing bag, a fixing sleeve, a grouting sleeve, an extrusion sleeve and a grouting box, wherein the first sealing bag, the second sealing bag, the fixing sleeve, the grouting sleeve and the extrusion sleeve are all sleeved outside the drainage pipe; four axial grooves are formed in the outer wall of the extraction pipe, and a hollow extraction channel is formed in the extraction pipe; the fixed sleeve is fixed on the extraction pipe, the first sealing bag is arranged between the grouting sleeve and the fixed sleeve, the second sealing bag is arranged between the grouting sleeve and the extrusion sleeve, and the grouting box directly or indirectly applies pressure to the extrusion sleeve, so that the first sealing bag and the second sealing bag are extruded with the hole wall of the extraction hole after being extruded so as to seal a gap between the corresponding extraction pipe and the extraction hole; two independent grouting cavities are arranged in the grouting box and are respectively communicated with a corresponding axial groove.
Description
Technical Field
The utility model belongs to the technical field of coal mine gas extraction, and particularly relates to a coal mine gas extraction hole plugging device.
Background
In the coal mine gas extraction process, extraction holes are required to be drilled on the roadway wall, the extraction holes are directly communicated with a gas layer, then the extraction holes are sealed and sealed, a channel is reserved, and subsequent extraction and sampling are performed through the channel.
At present, a bag hole packer is mainly used for sealing a pumping hole, the structure of the bag hole packer is very simple, namely two sealed bags are respectively fixed on a pumping pipe, each bag is respectively connected with a bag grouting pipe, and then the sealed grouting pipe is arranged between the two bags. When the device is used, the device is inserted into the extraction hole, and then grouting is carried out on the two bags respectively, so that the bags are compressed and sealed with the hole wall after being expanded. The portion between the two pockets is then grouting through the sealing grouting pipe so that the slurry seals the portion. Finally, a valve and an interface are arranged on the extraction pipe to prepare for subsequent extraction. The greatest disadvantage of this construction is the poor tightness, particularly the pouch near the outlet end, through which at least two pipes pass; thus, the bladder is not as tight as the tubing after inflation, which can affect the maximum grouting pressure of the subsequently sealed grouting pipe, potentially resulting in a failure to achieve a good seal. Meanwhile, when grouting is performed by the sealed grouting pipe, if the sealing performance of the two bags is good, the air cannot be discharged, that is, the final slurry cannot fill the corresponding space, and the sealing performance is poor. The success rate of the skilled worker is generally less than 90%, and once the sealing failure is found, the sealing can be totally sealed and additionally perforated, obviously, the exploitation cost is increased, and the leakage risk exists. Moreover, the method has long operation time and high experience requirement.
Therefore, how to make two bags effectively seal the extraction pipe and the extraction hole and ensure that the extraction hole between the two bags is effectively grouting sealed is a problem which needs to be solved at present.
Disclosure of Invention
The utility model aims at the problems, overcomes the defects of the prior art, and provides a coal mine gas extraction hole plugging device which is convenient to install and excellent in sealing performance.
In order to achieve the above purpose, the present utility model adopts the following technical scheme.
The utility model provides a coal mine gas extraction hole plugging device which is arranged in an extraction hole, wherein the extraction hole is arranged on a roadway wall; the grouting device comprises a drainage pipe, a first sealing bag, a second sealing bag, a fixing sleeve, a grouting sleeve, an extrusion sleeve and a grouting box, wherein the first sealing bag, the second sealing bag, the fixing sleeve, the grouting sleeve and the extrusion sleeve are all sleeved outside the drainage pipe; four axial grooves are formed in the outer wall of the extraction pipe, and a hollow extraction channel is formed in the extraction pipe;
the fixed sleeve is fixed on the extraction pipe, the first sealing bag is arranged between the grouting sleeve and the fixed sleeve, the second sealing bag is arranged between the grouting sleeve and the extrusion sleeve, and the grouting box directly or indirectly applies pressure to the extrusion sleeve, so that the first sealing bag and the second sealing bag are extruded with the hole wall of the extraction hole after being extruded so as to seal a gap between the corresponding extraction pipe and the extraction hole; two independent grouting cavities are arranged in the grouting box and are respectively communicated with a corresponding axial groove.
As a further improvement of the utility model, the first sealing bag and the second sealing bag are respectively hollow first sealing cavity and second sealing cavity, and the first sealing bag and the second sealing bag are made of high-elasticity soft materials.
As a further improvement of the utility model, the grouting sleeve is provided with a through grouting channel, and the grouting channel is communicated with the axial groove.
As a further improvement of the utility model, the grouting box is arranged outside the extraction hole, the inside of the extraction hole is divided into two independent grouting cavities by two grouting partition blocks, the corresponding part of the grouting box and each grouting cavity is respectively provided with a through grouting hole and a grouting through groove, and the grouting through groove is communicated with a corresponding axial groove.
As a further improvement of the utility model, the grouting box is also provided with two grouting clamping blocks which are assembled in a clamping way with the corresponding axial grooves, the two grouting clamping blocks are assembled in a clamping way with the two axial grooves respectively, and the two grouting through grooves are communicated with the corresponding axial grooves respectively; the two slurry passing holes are respectively communicated with the grouting pipe and the exhaust pipe directly or indirectly.
As a further improvement of the utility model, the fixing sleeve is provided with an installation table, the first sealing bag is sleeved on the installation table, and the inner side of the installation table is assembled with the four axial grooves in a clamping way.
As a further improvement of the utility model, the two ends of the grouting sleeve are respectively provided with a first grouting end ring and a second grouting end ring, the first grouting end ring and the second grouting end ring are fixedly connected through at least two grouting sleeve plates, and a grouting channel is formed between two adjacent grouting sleeve plates; a first sealing gasket is arranged between the first sealing bag and the first grouting end ring, and the first sealing gasket is assembled and sealed with the outer wall of the extraction pipe; and a second sealing gasket is arranged between the second grouting end ring and the second sealing bag.
As a further improvement of the utility model, a first extrusion end ring and a second extrusion end ring are respectively arranged at two ends of the extrusion sleeve, a plug strip is arranged on the first extrusion end ring, and the first extrusion end ring is tightly pressed with the end face of the second sealing bag;
the extrusion sleeve is close to the one end of slip casting cover and installs the grafting strip, grafting strip and the axial groove block assembly that corresponds, second seal bag, second sealed pad, second slip casting end ring all suit are outside the grafting strip.
As a further improvement of the utility model, one end of the extraction pipe penetrating through the extraction hole is respectively sleeved with a third sealing gasket, a first extrusion ring, a grouting box, a fourth sealing gasket, a second extrusion ring, a nut and a flange, and one end of the extraction hole penetrating through the extraction hole is provided with a thread part which is assembled with the nut through screw thread screwing; the grouting end cover and the grouting box are assembled and fixed in a sealing way.
As a further improvement of the utility model, the outer sealing sleeve of the grouting box is provided with a switch sleeve, the outer sealing sleeve of the switch sleeve is provided with a switch seat, and the switch seat is assembled and fixed with the grouting end cover; the bolts penetrate through the grouting end cover, the switch seat, the grouting box, the first extrusion ring and the third sealing gasket and then are assembled and fixed with the roadway wall;
the corresponding positions of the switch seat and the two slurry passing holes are respectively provided with a through pipe hole, and the grouting pipe and the exhaust pipe are respectively assembled with the corresponding pipe holes in a sealing way; the corresponding parts of the switch sleeve and the two pulp passing holes are respectively provided with a penetrating exhaust groove and a pulp discharging groove; in an initial state, the exhaust groove and the slurry discharge groove are respectively communicated with the two slurry passing holes and the two pipe holes; the switch seat is also provided with a handle groove which penetrates through the switch seat, and the handle is assembled and fixed with the switch sleeve after penetrating through the handle groove.
The beneficial effects of the utility model are as follows:
the utility model adopts the mode of extruding the first sealing bag and the second sealing bag to realize the extrusion sealing between the extraction pipe and the extraction hole wall, and compared with the traditional technology adopting a bag, the mode is faster, has better sealing reliability, can provide higher grouting pressure for the follow-up, and can ensure the effective sealing and fixing between the extraction pipe and the extraction hole wall.
In addition, the utility model adopts the mode of arranging the axial grooves on the extraction pipe, and grouting by using one axial groove and exhausting by using the other axial groove can effectively ensure that grouting liquid fills the extraction holes between the first sealing bag and the second sealing bag, thereby greatly improving the tightness of the extraction holes, reducing the leakage probability and also reducing the extraction cost. In addition, the utility model has low requirements on operation experience, high operation efficiency and good effect, and can effectively reduce failure rate; and part of parts can be disassembled for repeated use, so that the cost can be effectively reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a second schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic diagram III of the structure of the present utility model;
FIG. 4 is a top view of the present utility model;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a cross-sectional view B-B of FIG. 4;
fig. 7 is a cross-sectional view of C-C in fig. 6.
The marks in the figure: 01 is a roadway wall, 02 is a pumping hole, 100 is a pumping pipe, 101 is a pumping channel, 102 is an axial groove, 103 is a threaded part, 210 is a fixed sleeve, 211 is an installation table, 220 is a grouting sleeve, 221 is a first grouting end ring, 222 is a second grouting end ring, 223 is a grouting sleeve plate, 224 is a grouting channel, 230 is an extrusion sleeve, 231 is a first extrusion end ring, 232 is a second extrusion end ring, 233 is a plug strip, 310 is a first sealing bag, 311 is a first sealing cavity, 320 is a first sealing pad, 330 is a second sealing bag, 331 is a second sealing cavity the second gasket 340, the third gasket 350, the fourth gasket 360, the first extrusion ring 410, the grouting box 420, the grouting clamping block 421, the grouting spacer 422, the grouting cavity 423, the grouting through groove 424, the through hole 425, the switch seat 430, the pipe hole 431, the handle groove 432, the switch sleeve 440, the slurry discharge groove 441, the exhaust groove 442, the grouting end cover 450, the second extrusion ring 460, the nut 510, the flange 520, the bolt 530, the handle 540, the screw 550, the grouting pipe 610 and the exhaust pipe 620.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1-7, the plugging device for coal mine gas extraction holes in the embodiment is used for sealing the extraction holes 02, wherein the extraction holes 02 are arranged on a roadway wall 01; the grouting device comprises a extraction pipe 100, a first sealing bag 310, a second sealing bag 330, a fixing sleeve 210, a grouting sleeve 220, an extrusion sleeve 230 and a grouting box 420, wherein the first sealing bag 310, the second sealing bag 330, the fixing sleeve 210, the grouting sleeve 220 and the extrusion sleeve 230 are sleeved outside the extraction pipe 100; four axial grooves 102 are formed in the outer wall of the extraction pipe 100, and a hollow extraction channel 101 is formed in the extraction pipe 100.
The first sealing bag 310 and the second sealing bag 330 are respectively hollow first sealing cavity 311 and second sealing cavity 331, and the first sealing bag 310 and the second sealing bag 330 are made of high-elasticity and soft materials such as rubber; the fixing sleeve 210 is fixed on the extraction pipe 100 through screws 550, the first sealing bag 310 is installed between the grouting sleeve 220 and the fixing sleeve 210, the second sealing bag 330 is installed between the grouting sleeve 220 and the extrusion sleeve 230, and the grouting box 420 directly or indirectly applies pressure to the extrusion sleeve 230, so that the extrusion sleeve 230 respectively extrudes the first sealing bag 310 and the second sealing bag 330, and the first sealing bag 310 and the second sealing bag 330 are axially shortened and radially thickened after being extruded, so as to be extruded with the hole wall of the extraction hole 02 to seal a gap between the corresponding extraction pipe 100 and the extraction hole 02.
The grouting sleeve 220 is provided with a through grouting channel 224, and the grouting channel 224 is communicated with the axial groove 102, so that the slurry can enter the extraction hole 02 between the first sealing bag 310 and the second sealing bag 330 for grouting, sealing and fixing during grouting.
The grouting box 420 is arranged outside the extraction hole 02, the inside of the extraction hole 02 is divided into two independent grouting cavities 423 through two grouting partition blocks 422, a through grouting hole 425 and a grouting through groove 424 are respectively arranged at the corresponding position of each grouting cavity 423 of the grouting box 420, and the grouting through groove 424 is communicated with a corresponding axial groove 102. The grouting box 420 is further provided with a grouting clamping block 421, and the grouting clamping block 421 is assembled with the corresponding axial slot 102 in a clamping manner, so that the grouting box 420 is fixed in the circumferential direction. The two grouting clamping blocks 421 in this embodiment are respectively assembled with the two axial grooves 102 in a clamping manner, and the two grouting through grooves 424 are respectively communicated with the corresponding axial grooves 102. The two through-holes 425 are respectively communicated with the grouting pipe 610 and the exhaust pipe 620 directly or indirectly.
After the first and second sealing bags 310 and 330 are sealed with the extraction holes 02, pressurized grouting liquid is injected into the corresponding grouting cavities 423 through the grouting pipes 610, the grouting liquid flows into the grouting sleeve 220 along the corresponding axial grooves 102 and flows out of the grouting channels 224, then part of air flows into the other grouting cavities 423 from the other axial grooves 102, and finally is discharged from the exhaust pipe 620, and the air between the first and second sealing bags 310 and 330 can be considered to be completely discharged until the exhaust pipe 620 discharges the grouting liquid. And then sealing the exhaust pipe 620, and continuing to inject grouting liquid into the grouting pipe 610 until reaching the preset grouting pressure, thereby completing grouting. And after grouting is completed, waiting for grouting to solidify, and then plugging the extraction hole 02. The greatest benefit of this design is that there is no additional conduit at the second bladder 330, which does not affect its sealing properties, and air can be vented during grouting, thereby ensuring that the portion between the first and second bladders 310, 330 is filled with grouting fluid, and thus ensuring a secure, sealing effect.
Referring to fig. 5, preferably, the fixing sleeve 210 is provided with a mounting table 211, the first sealing bag 310 is sleeved on the mounting table 211, and the inner side of the mounting table 211 is assembled with the four axial grooves 102 in a clamping manner.
More preferably, the two ends of the grouting sleeve 220 are further provided with a first grouting end ring 221 and a second grouting end ring 222, the first grouting end ring 221 and the second grouting end ring 222 are fixedly connected through at least two grouting sleeve plates 223, and a grouting channel 224 is formed between two adjacent grouting sleeve plates 223; a first sealing gasket 320 is installed between the first sealing bag 310 and the first grouting end ring 221, the first sealing gasket 320 is assembled and sealed with the outer wall of the extraction pipe 100, and the design is mainly used for increasing the sealing effect between the fixing sleeve 210 and the extraction pipe 100 so as to provide a foundation for subsequent high-pressure grouting.
A second sealing pad 340 is installed between the second grouting end ring 222 and the second sealing bag 330, and the second sealing pad 340 and the first sealing pad 320 are both made of water-absorbing expansion rubber. In the subsequent use process, as water is arranged in the roadway wall 01 or grouting liquid, the second sealing gasket 340 and the first sealing gasket 320 can absorb water and expand, and the radial extrusion force between the wall of the extraction hole 02 and the sampling pipe is further increased after expansion, so that the tightness is improved.
Preferably, a plug strip 233 is installed on one end of the extrusion sleeve 230 near the grouting sleeve 220, the plug strip 233 is assembled with the corresponding axial slot 102 in a clamping manner, and the second sealing bag 330, the second sealing gasket 340 and the second grouting end ring 222 are all sleeved outside the plug strip 233. This design is mainly intended to avoid that the second sealing bladder 330 is pressed into the axial groove 102, which results in a reduced or blocked communication cross section of the axial groove 102, which affects the subsequent grouting.
The two ends of the extrusion sleeve 230 are respectively provided with a first extrusion end ring 231 and a second extrusion end ring 232, the plug strip 233 is installed on the first extrusion end ring 231, and the end surfaces of the first extrusion end ring 231 and the second sealing bag 330 are pressed.
Preferably, the end of the extraction pipe 100 penetrating the extraction hole 02 is respectively sleeved with a third sealing gasket 350, a first extrusion ring 410, a grouting box 420, a fourth sealing gasket 360, a second extrusion ring 460, a nut 510 and a flange 520, the end of the extraction hole 02 penetrating the extraction hole 02 is provided with a threaded portion 103, and the threaded portion 103 and the nut 510 are assembled through threaded screwing. So that the nut 510 and the extraction pipe 100 axially move, that is, the extraction pipe 100 drives the fixing sleeve 210 to move towards the nut 510, or the nut 510 applies a pushing force to the extrusion sleeve 230 to move towards the fixing sleeve 210. Eventually, the first and second sealing bladders 310, 330 are squeezed and inflated. The flange 520 is used for installing an air valve, and the opening and closing of the extraction channel 101 are controlled by the air valve when the air valve is used.
The first compression ring 410 and the roadway wall 01, and the first compression ring 410 and the second compression end ring 232 are sealed by compressing the third sealing gasket 350. The side of the grouting box 420 far away from the extraction hole 02 is sealed through a grouting end cover 450, sealing is achieved between the grouting end cover 450 and the second extrusion ring 460 through extruding a fourth sealing gasket 360, and the grouting end cover 450 and the grouting box 420 are assembled and fixed in a sealing way.
Referring to fig. 6-7, the outer sealing sleeve of the grouting box 420 is provided with a switch sleeve 440, the outer sealing sleeve of the switch sleeve 440 is provided with a switch seat 430, and the switch seat 430 is assembled and fixed with a grouting end cover 450; bolts 530 pass through grouting end cover 450, switch base 430, grouting box 420, first compression ring 410 and third sealing gasket 350, and then are assembled and fixed with roadway wall 01. The present embodiment may employ expansion bolts to effect fixation or anchor bolts 530 to roadway wall 01 by an anchor.
The switch seat 430 is provided with penetrating pipe holes 431 corresponding to the two slurry passing holes 425, and the grouting pipe 610 and the exhaust pipe 620 are respectively assembled with the corresponding pipe holes 431 in a sealing manner. The switch sleeve 440 is provided with a through exhaust slot 442 and a slurry discharge slot 441 corresponding to the two slurry passing holes 425. In the initial state, the exhaust grooves 442 and the slurry discharge grooves 441 respectively communicate the two slurry passing holes 425 with the two pipe holes 431.
The switch base 430 is further provided with a through handle slot 432, the handle 540 passes through the handle slot 432 and is assembled and fixed with the switch sleeve 440, and the switch sleeve 440 can be rotated by the handle 540, so that the communication or closing of the exhaust slot 442 and the slurry discharge slot 441 corresponding to the slurry passing hole 425 can be switched.
During installation, firstly, each part is sequentially installed according to the structure of fig. 5, then the extraction pipe 100 is installed in the extraction hole 02, and the bolts 530 penetrate through the grouting end cover 450, the switch seat 430, the grouting box 420, the first extrusion ring 410 and the third sealing gasket 350 and then are fixed with the roadway wall 01; the nut 510 is turned to enable the nut 510 to displace with the extraction pipe 100 so as to squeeze the first sealing bag 310 and the second sealing bag 330, and the first sealing bag 310 and the second sealing bag 330 are pressed and sealed with the wall of the extraction hole 02 after being squeezed. Grouting fluid is injected into the grouting pipe 610 until the exhaust pipe 620 discharges the grouting fluid, and the handle 540 is rotated by a certain angle (about one quarter of the handle groove 432), so that the handle 540 drives the switch sleeve 440 to rotate until the exhaust groove 442 is misplaced with the corresponding through-slurry hole 425 to close the corresponding through-slurry hole 425. Grouting is continued to be injected into the grouting pipe 610 until a preset grouting pressure is reached. The handle 540 is rotated to the other end, at which time the switch housing 440 is rotated to cause the slurry discharge groove 441 to be dislocated from the corresponding slurry via 425 to close the corresponding slurry via 425. And (5) disassembling grouting equipment, and waiting for grouting solidification. After the extraction is completed, the nut 510, the flange 520, the grouting end cover 450, the switch seat 430, the first extrusion ring 410 and the third sealing gasket 350 are all detachable and then reused (the bolts 530 are replaced by screws and nuts, and the nuts can be quickly detached after being detached), so that the cost is reduced, and only the extraction channel 101 is blocked at the moment.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. The coal mine gas extraction hole plugging device is arranged in an extraction hole, and the extraction hole is arranged on the wall of a roadway; the method is characterized in that: the grouting device comprises a drainage pipe, a first sealing bag, a second sealing bag, a fixing sleeve, a grouting sleeve, an extrusion sleeve and a grouting box, wherein the first sealing bag, the second sealing bag, the fixing sleeve, the grouting sleeve and the extrusion sleeve are all sleeved outside the drainage pipe; four axial grooves are formed in the outer wall of the extraction pipe, and a hollow extraction channel is formed in the extraction pipe;
the fixed sleeve is fixed on the extraction pipe, the first sealing bag is arranged between the grouting sleeve and the fixed sleeve, the second sealing bag is arranged between the grouting sleeve and the extrusion sleeve, and the grouting box directly or indirectly applies pressure to the extrusion sleeve, so that the first sealing bag and the second sealing bag are extruded with the hole wall of the extraction hole after being extruded so as to seal a gap between the corresponding extraction pipe and the extraction hole; two independent grouting cavities are arranged in the grouting box and are respectively communicated with a corresponding axial groove.
2. The coal mine gas extraction hole plugging device according to claim 1, wherein: the first sealing bag and the second sealing bag are respectively hollow first sealing cavity and second sealing cavity, and are made of high-elasticity and soft materials.
3. The coal mine gas extraction hole plugging device according to claim 1, wherein: and the grouting sleeve is provided with a penetrating grouting channel, and the grouting channel is communicated with the axial groove.
4. The coal mine gas extraction hole plugging device according to claim 1, wherein: the grouting box is arranged outside the extraction hole, the inside of the extraction hole is divided into two independent grouting cavities through two grouting partition blocks, the corresponding part of the grouting box and each grouting cavity is respectively provided with a through grouting hole and a grouting through groove, and the grouting through groove is communicated with a corresponding axial groove.
5. The coal mine gas extraction hole plugging device according to claim 4, wherein: the grouting box is also provided with grouting clamping blocks, two grouting clamping blocks are assembled by clamping corresponding axial grooves, and two grouting through grooves are communicated with corresponding axial grooves; the two slurry passing holes are respectively communicated with the grouting pipe and the exhaust pipe directly or indirectly.
6. The coal mine gas extraction hole plugging device according to claim 4 or 5, wherein: the fixing sleeve is provided with an installation table, the first sealing bag is sleeved on the installation table, and the inner side of the installation table is assembled with the four axial grooves in a clamping mode.
7. The coal mine gas extraction hole plugging device according to claim 6, wherein: the two ends of the grouting sleeve are respectively provided with a first grouting end ring and a second grouting end ring, the first grouting end ring and the second grouting end ring are fixedly connected through at least two grouting sleeve plates, and a grouting channel is formed between two adjacent grouting sleeve plates; a first sealing gasket is arranged between the first sealing bag and the first grouting end ring, and the first sealing gasket is assembled and sealed with the outer wall of the extraction pipe; and a second sealing gasket is arranged between the second grouting end ring and the second sealing bag.
8. The coal mine gas extraction hole plugging device according to claim 7, wherein: the two ends of the extrusion sleeve are respectively provided with a first extrusion end ring and a second extrusion end ring, the first extrusion end ring is provided with a plug strip, and the first extrusion end ring is tightly pressed with the end face of the second sealing bag; the extrusion sleeve is close to the one end of slip casting cover and installs the grafting strip, grafting strip and the axial groove block assembly that corresponds, second seal bag, second sealed pad, second slip casting end ring all suit are outside the grafting strip.
9. The coal mine gas extraction hole plugging device according to claim 7, wherein: the end of the extraction pipe penetrating out of the extraction hole is respectively sleeved with a third sealing gasket, a first extrusion ring, a grouting box, a fourth sealing gasket, a second extrusion ring, a nut and a flange, and a threaded part is arranged at the end of the extraction hole penetrating out of the extraction hole and assembled with the nut through threaded screwing; and a grouting end cover is fixedly arranged on the grouting box in a sealing manner.
10. The coal mine gas extraction hole plugging device according to claim 9, wherein: the outer sealing sleeve of the grouting box is provided with a switch sleeve, the outer sealing sleeve of the switch sleeve is provided with a switch seat, and the switch seat is fixedly assembled with the grouting end cover; the bolts penetrate through the grouting end cover, the switch seat, the grouting box, the first extrusion ring and the third sealing gasket and then are assembled and fixed with the roadway wall; the corresponding positions of the switch seat and the two slurry passing holes are respectively provided with a through pipe hole, and the grouting pipe and the exhaust pipe are respectively assembled with the corresponding pipe holes in a sealing way; the corresponding parts of the switch sleeve and the two pulp passing holes are respectively provided with a penetrating exhaust groove and a pulp discharging groove; in an initial state, the exhaust groove and the slurry discharge groove are respectively communicated with the two slurry passing holes and the two pipe holes; the switch seat is also provided with a handle groove which penetrates through the switch seat, and the handle is assembled and fixed with the switch sleeve after penetrating through the handle groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320109732.9U CN219081540U (en) | 2023-01-16 | 2023-01-16 | Coal mine gas extraction hole plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320109732.9U CN219081540U (en) | 2023-01-16 | 2023-01-16 | Coal mine gas extraction hole plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219081540U true CN219081540U (en) | 2023-05-26 |
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ID=86424160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320109732.9U Active CN219081540U (en) | 2023-01-16 | 2023-01-16 | Coal mine gas extraction hole plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219081540U (en) |
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2023
- 2023-01-16 CN CN202320109732.9U patent/CN219081540U/en active Active
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