CN113153213A - Gas collection hole plugging device and plugging method thereof - Google Patents
Gas collection hole plugging device and plugging method thereof Download PDFInfo
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- CN113153213A CN113153213A CN202110520619.5A CN202110520619A CN113153213A CN 113153213 A CN113153213 A CN 113153213A CN 202110520619 A CN202110520619 A CN 202110520619A CN 113153213 A CN113153213 A CN 113153213A
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- plugging
- hole
- sleeve
- grouting
- outer sleeve
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 41
- 230000003028 elevating effect Effects 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 15
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 7
- 239000011440 grout Substances 0.000 claims description 7
- 239000004088 foaming agent Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 239000011496 polyurethane foam Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 3
- 239000007788 liquid Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 12
- 238000007493 shaping process Methods 0.000 abstract description 2
- 238000007569 slipcasting Methods 0.000 description 18
- 230000008093 supporting effect Effects 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000000670 limiting effect Effects 0.000 description 5
- 230000005574 cross-species transmission Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to the technical field of gas equipment, in particular to a gas collection hole plugging device and a plugging method thereof. The device comprises a plugging grouting mechanism and a coaxial pipe lifting mechanism, wherein the coaxial pipe lifting mechanism drives the plugging grouting mechanism to move in a gas collection hole; the shutoff grouting mechanism includes outer tube and interior sleeve pipe, interior sleeve pipe sliding connection is in the inside of outer tube, and the inner wall in close contact with of interior sheathed tube outer wall and outer tube, the bottom of outer tube is equipped with annular water pocket, the middle part of annular water pocket is equipped with elastic connection portion, elastic connection portion cup joints on the outer wall of outer tube, be connected with pressurization water injection device on the water pocket, interior sheathed tube upper end is connected with pressurization grouting device. This technical scheme is used for solving among the prior art when gathering the hole shutoff to gas, because gas gathers the inside gas that has of hole and emits, causes the influence to the solidification shaping of shutoff thick liquid, leads to gathering the not good problem of shutoff effect of hole to gas.
Description
Technical Field
The invention relates to the technical field of hole plugging equipment, in particular to a gas collection hole plugging device and a plugging method thereof.
Background
At present, in the field of coal mines, drilling is often needed to be performed on a coal seam and a gas gathering area to perform coal mine gas extraction so as to prevent safety accidents such as gas explosion, gas outburst and the like, after extraction is completed, an extraction hole needs to be plugged so as to prevent gas leakage and damage to the underground operation environment, and life safety of operators is threatened.
Disclosure of Invention
Aiming at the defects of the technology, the invention aims to provide a gas collection hole plugging device and a plugging method thereof, which are used for solving the problem that when a gas collection hole is plugged in the prior art, the gas is continuously blown out from the inside of the gas collection hole, so that the solidification and forming of plugging slurry are influenced, and the plugging effect on the gas collection hole is poor.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a gas collection hole plugging device comprises a plugging grouting mechanism and a coaxial pipe lifting mechanism, wherein the coaxial pipe lifting mechanism drives the plugging grouting mechanism to move in a gas collection hole;
the plugging grouting mechanism comprises an outer sleeve and an inner sleeve, the inner sleeve is connected to the inside of the outer sleeve in a sliding mode, the outer wall of the inner sleeve is in close contact with the inner wall of the outer sleeve, an annular water bag is arranged at the bottom of the outer sleeve, an elastic connecting part is arranged in the middle of the annular water bag and sleeved on the outer wall of the outer sleeve, a pressurizing water injection device is connected onto the water bag, a pressurizing grouting device is connected to the upper end of the inner sleeve, and the pressurizing water injection device and the pressurizing grouting device are both located on the ground of a coal mine roadway;
with spool hoist mechanism including annular installation seat, mirror image symmetry is equipped with elevating system on the annular installation seat, elevating system is including the first elevating system and the second elevating system that set up from top to bottom, be equipped with first fixture and second fixture on first elevating system and the second elevating system respectively, first fixture and second fixture carry out the centre gripping respectively to outer sleeve pipe and interior sheathed tube outer wall and fix, and the vertical upper and lower slip of first elevating system control outer tube that the symmetry set up, second elevating system is used for controlling interior vertical upper and lower slip of sleeve pipe.
The working principle of the technical scheme is as follows:
the plugging device is carried to be right above the gas collecting hole, the inner sleeve and the outer sleeve move towards the inside of the gas collecting hole under the driving of the first lifting mechanism and the second lifting mechanism, then water is injected into the water bag through the pressurized water injection device, the gas collecting hole is plugged, so that gas below the gas collecting hole cannot overflow upwards, then a first layer of plugging slurry is injected into the gas hole, the height of the plugging slurry is lower than that of an elastic connecting part arranged in the middle of the annular water bag, after the slurry is solidified, the inner sleeve and the outer sleeve are lifted upwards to separate the elastic connecting part from the outer sleeve, at the moment, the water bag is folded in the water bag box, an annular space in the middle of the water bag is sealed, subsequent grouting plugging is facilitated, finally, the inner sleeve and the outer sleeve are lifted upwards continuously, and under the action of the pressurized grouting device, the inner sleeve is used for, until the hole plugging is finished.
Further limiting, the bottom circumference of the inner sleeve and the outer sleeve is evenly provided with strip-shaped through holes corresponding in position, the annular water bag is positioned above the strip-shaped through holes, the upper end of the strip-shaped through holes of the inner sleeve is provided with a rotating shaft, the rotating shaft is rotatably connected with a rotating rod, the rotating rod can rotate in the strip-shaped through holes of the inner sleeve and the outer sleeve, the bottom end of the inner sleeve is provided with a bottom plate, the bottom plate is provided with elastic pieces corresponding to the rotating rods in number, one end of each elastic piece is fixedly connected with the bottom plate, the other end of each elastic piece is fixedly connected with the upper end of the rotating rod, and each elastic piece is in a stretching state and is characterized in that when the inner sleeve slides out towards the lower end of the outer sleeve, the rotating rod can rotate outwards under the action of the elastic pieces, so that the end part of the rotating rod is clamped on the inner wall of the gas collecting hole, thereby supporting and limiting the water bag above the inner sleeve, the water bag is ensured to be fully filled with gas collection holes in the space formed by the water bag, and the sealing effect of the water bag on the collection holes is ensured.
Further inject, be equipped with the closing plate on the lower surface of bottom plate, the diameter of closing plate is greater than the diameter of outer tube, and its beneficial part lies in, and the closing plate can carry out the shutoff to the tip of outer tube, makes the pressure of slip casting not too much reveal, guarantees simultaneously that the shutoff thick liquid can not flow out from the bottom of outer tube.
Further inject, the outside cladding of dwang has the elastic layer, and its beneficial effect lies in, and the elastic layer can further strengthen support and spacing effect to the water pocket.
Further inject, the top of annular water pocket is equipped with the sliding sleeve, the sliding sleeve cup joints with the outer tube on, the outside of sliding sleeve is equipped with the slip casting bag, all be equipped with the grout inlet hole that corresponds with outer tube bar hole position on slip casting bag and the sliding sleeve, be equipped with out the thick liquid hole on the decurrent bottom surface of slip casting bag, the diameter in play thick liquid hole is less than the diameter in advance thick liquid hole, the length in highly being greater than outer tube bar hole of sliding sleeve, its beneficial part lies in, seals through the bar hole on the outer tube of sliding sleeve, then through the mode of outwards grouting from the slip casting bag with the shutoff thick liquid, makes the injection distribution of thick liquid more even, and the inflation of slip casting bag is further sealed to gas collection hole simultaneously, is the malleation in the space that makes the slip casting, further guarantees that the gas of below can not upwards spill over.
Further inject, first elevating system and second elevating system all include the mounting panel, inboard on the mounting panel is equipped with the threaded rod, be equipped with the slider on the threaded rod, the both sides of threaded rod are equipped with the guide bar, guide bar and slider sliding connection, the upper end of mounting panel is equipped with driving motor, driving motor's output and the upper end fixed connection of threaded rod, first fixture and second fixture symmetry respectively set up on first elevating system and second elevating system's slider.
Further inject, first fixture and second fixture all include linear electric motor, linear electric motor's tip fixedly connected with clamping part.
Further inject, the clamping part is the splint, the shape of splint is isosceles triangle, and its beneficial effect lies in that isosceles triangle's splint can press from both sides tightly the sleeve pipe diameter of difference, increases its practicality.
Further inject, be equipped with the backup pad on the slider that first elevating system and second elevating system symmetry set up respectively, the through-hole with outer tube and interior sleeve pipe diameter assorted has been seted up respectively at the middle part of backup pad, interior sleeve pipe and outer tube are located the through-hole that corresponds with it respectively, first fixture and second fixture set up in the backup pad, and its beneficial effect lies in, the backup pad can support the straightness that hangs down of the centre gripping object removal in the middle of avoiding it to empty, can also increase the chamber.
Further, the contact surface of the clamping plate and the inner sleeve or the outer sleeve is provided with the non-slip mat, and the non-slip mat has the advantage that the non-slip mat can prevent the clamping plate and a clamped object from slipping.
Further limited, the method also comprises a plugging method of the plugging device for the gas collecting hole, and the specific plugging steps are as follows:
(1) carrying the device to the position right above the gas collecting hole;
(2) the outer sleeve and the inner sleeve are lowered into the gas collecting hole under the action of the first lifting mechanism and the second lifting mechanism;
(3) under the action of the first lifting mechanism, the inner sleeve moves downwards until the rotating rod is clamped in the gas collecting hole under the action of the elastic part;
(4) the pressurized water injection device injects water into the water bag until the water bag expands to block the gas collection hole;
(5) at the moment, injecting a polyurethane foaming agent or plugging slurry into the gas collecting hole manually or mechanically;
(6) when the polyurethane foaming agent or the plugging slurry is solidified, the inner sleeve and the outer sleeve are lifted upwards under the action of the first lifting mechanism and the second lifting mechanism, so that the sealing plate is positioned above the polyurethane foaming layer or the solidified plugging slurry, the elastic connecting part of the water bag is separated from the outer sleeve under the action of resistance, and the water bag is gathered inwards under the action of pressure to plug the annular space in the middle of the water bag;
(7) sliding the sliding sleeve to the bottom end of the outer sleeve, and sealing the strip-shaped through hole by the sliding sleeve;
(8) the pressurized grouting device injects plugging slurry into the inner sleeve, the plugging slurry enters from a slurry inlet hole of the grouting bag through the strip-shaped hole and is discharged from a slurry outlet hole, and a cavity is formed between the expansion of the grouting bag and polyurethane foam or the first layer of plugging slurry as the diameter of the slurry inlet hole is larger than that of the slurry outlet hole;
(9) after the cavity in the step (8) is filled with the slurry, waiting for the slurry to solidify;
(10) after solidification is finished, under the action of the first lifting mechanism and the second lifting mechanism, the grouting bag is lifted to the upper end of the gas cavity, and under the action of the pressurized grouting device, the gas collection hole is subjected to final grouting plugging.
The invention has the technical effects that:
(1) the hole is gathered to the gas to the setting of water pocket carries out the shutoff, makes the gas of lower part can not upwards spill over, guarantees the shaping effect of shutoff thick liquid to the effect of hole shutoff is gathered to the gas has been promoted. (2) When interior sleeve pipe outside sheathed tube lower extreme removed, the dwang outwards rotated under the effect of elastic component and stretches out to the chucking plays supporting role and limiting displacement to the water pocket on gas collection hole, has guaranteed the sealed effect of water pocket inflation time to gas collection hole, can also play the supporting role to slip casting for the first time simultaneously. (3) Adopt the slip casting bag to gather the shutoff of slip casting in the hole to the gas, make the thick liquid distribute more evenly, reduce the impact force when thick liquids are poured into simultaneously, the production of bubble when reducing the slip casting, the hole shutoff is gathered to the gas to the bag gradually of inflation simultaneously, makes its inside length present the state of malleation to further avoid below gas to upwards spill over. (4) The plugging device is simple in structure, and after the hole is plugged, the inner sleeve and the outer sleeve can be taken out of the gas collection hole, so that the plugging cost is saved.
Drawings
Fig. 1 is a schematic perspective view of a plugging device according to the present embodiment.
Fig. 2 is a schematic cross-sectional view of a plugging device according to the present embodiment.
Fig. 3 is a schematic top view of a plugging device according to the present embodiment.
Fig. 4 is a schematic perspective view of a plugging and grouting mechanism in this embodiment.
Fig. 5 is a schematic front view of the plugging and grouting mechanism in this embodiment.
Fig. 6 is a schematic top view of the plugging and grouting mechanism in this embodiment.
Fig. 7 is a perspective view of the coaxial tube lifting mechanism in this embodiment.
Fig. 8 is a schematic front view of the coaxial tube lifting mechanism in this embodiment.
Fig. 9 is a schematic top view of the coaxial tube lifting mechanism in this embodiment.
Fig. 10 is a schematic diagram of water injection of the water bag during plugging in the present embodiment.
Fig. 11 is a schematic view of the first grouting in this embodiment.
Fig. 12 is a schematic view of the second grouting in this embodiment.
Reference numerals
The device comprises an annular mounting seat 1, a mounting plate 11, a threaded rod 12, a guide rod 13, a sliding block 14, a linear motor 15, a clamping plate 16, a driving motor 17, a supporting plate 18, an inner sleeve 2, an outer sleeve 21, a water bag 22, a sliding sleeve 23, a grouting bag 24, a rotating rod 25, an elastic piece 26, a bottom plate 27, an elastic connecting part 28, a sealing plate 29, a pressurized water injection device 3, a pressurized grouting device 4 and plugging slurry 5.
Detailed Description
The following is further detailed by way of specific embodiments:
as shown in fig. 1, 2, 3, 7, 8 and 9, a gas collecting hole plugging device mainly comprises two parts, namely a coaxial pipe lifting mechanism and a plugging grouting mechanism, in this embodiment, the coaxial pipe lifting mechanism mainly comprises an annular mounting base 1, a foundation bolt is arranged on the arc mounting base, the foundation bolt is fixed on the ground of a coal mine when in use, lifting mechanisms are symmetrically arranged on the annular mounting base 1 in a mirror image manner, each lifting mechanism comprises a first lifting mechanism and a second lifting mechanism which are distributed up and down, the first lifting mechanism and the second lifting mechanism are respectively provided with a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism respectively clamp and fix the outer walls of an outer sleeve 21 and an inner sleeve 2, the first lifting mechanism which is symmetrically arranged controls the outer sleeve 21 to vertically slide up and down, second elevating system is used for controlling interior sleeve pipe 2 and slides from top to bottom vertically, specific first elevating system and second elevating system all include mounting panel 11, the inboard on the mounting panel 11 is equipped with threaded rod 12, be equipped with slider 14 on the threaded rod 12, the both sides of threaded rod 12 are equipped with guide bar 13, guide bar 13 and slider 14 sliding connection, the upper end of mounting panel 11 is equipped with driving motor 17, driving motor 17's output and the upper end fixed connection of threaded rod 12, first fixture and second fixture symmetry respectively set up on first elevating system and second elevating system's slider 14, driving motor 17's rotation drives threaded rod 12 rotatory, thereby make slider 14 reciprocate on threaded rod 12 upper berth.
Preferably, first fixture and second fixture all include linear electric motor 15, and linear electric motor 15's tip fixedly connected with clamping part, clamping part are splint 16, and splint 16's shape is isosceles triangle, and its beneficial part lies in, and isosceles triangle's splint 16 can press from both sides tightly the sleeve pipe diameter of difference, increases its practicality. The outside cladding of dwang 25 has the elastic layer, and the elastic layer can be the elasticity cloth, and its beneficial effect lies in, and the elastic layer can further strengthen support and spacing effect to water pocket 22. The supporting plates 18 are respectively arranged on the sliding blocks 14 symmetrically arranged on the first lifting mechanism and the second lifting mechanism, through holes matched with the diameters of the outer sleeve 21 and the inner sleeve 2 are respectively formed in the middle of the supporting plates 18, the inner sleeve 2 and the outer sleeve 21 are respectively located in the through holes corresponding to the inner sleeve 2 and the outer sleeve, the first clamping mechanism and the second clamping mechanism are arranged on the supporting plates 18, the supporting plates 18 can support the first lifting mechanism and the second lifting mechanism on two sides, and the verticality of the movement of a clamping object in the middle of a cavity can be increased while the situation that the first lifting mechanism and the second lifting mechanism topple. The contact surface of the clamping plate 16 and the inner sleeve 2 or the outer sleeve 21 is provided with a non-slip mat, which is beneficial in that the non-slip mat can avoid the slip between the clamping plate 16 and the clamped object, and in this embodiment, the non-slip mat can be a rubber mat.
As shown in fig. 4, fig. 5 and fig. 6, the plugging grouting mechanism includes an outer sleeve 21 and an inner sleeve 2, the inner sleeve 2 is slidably connected inside the outer sleeve 21, the outer wall of the inner sleeve 2 is in close contact with the inner wall of the outer sleeve 21, an annular water bag 22 is arranged at the bottom of the outer sleeve 21, an elastic connecting portion 28 is arranged in the middle of the annular water bag 22, in this embodiment, the material of the elastic connecting portion 28 is similar to that of a rubber band, the elastic connecting portion 28 is sleeved on the outer wall of the outer sleeve 21, a pressurized water injection device 3 is connected to the water bag 22, a pressurized grouting device 4 is connected to the upper end of the inner sleeve 2, and both the pressurized water injection device 3 and the pressurized grouting device 4 are located on the ground of the coal mine roadway. Preferably, the bottom end circumference of the inner sleeve 2 and the outer sleeve 21 is evenly provided with strip-shaped through holes with corresponding positions, the annular water sac 22 is positioned above the strip-shaped through holes, the upper end of the strip-shaped through hole of the inner sleeve 2 is provided with a rotating shaft, the rotating shaft is rotatably connected with a rotating rod 25, the rotating rod 25 can rotate in the strip-shaped through holes of the inner sleeve 2 and the outer sleeve 21, the bottom end of the inner sleeve 2 is provided with a bottom plate 27, the bottom plate 27 is provided with elastic pieces 26 with the number corresponding to that of the rotating rod 25, one end of each elastic piece 26 is fixedly connected with the bottom plate 27, the other end of each elastic piece 26 is fixedly connected with the upper end of the corresponding rotating rod 25, the elastic pieces 26 are in a stretching state, the working principle is that when the inner sleeve 2 slides out towards the lower end of the outer sleeve 21, the rotating rod 25 can rotate outwards under the action of the elastic pieces 26, so that the end part of the rotating rod 25 is clamped on the inner wall of the gas collecting hole, thereby supporting and limiting the water sac 22 above the inner sleeve, the water bag 22 can be fully filled with the gas collecting holes in the formed space, and the sealing effect of the water bag 22 on the collecting holes is ensured.
Preferably, the lower surface of the bottom plate 27 is provided with a sealing plate 29, and the diameter of the sealing plate 29 is larger than that of the outer sleeve 21, which is beneficial in that the sealing plate 29 can seal the end of the outer sleeve 21, so that the pressure of grouting can not leak excessively, and meanwhile, the sealing grout 5 can not flow out from the bottom end of the outer sleeve 21. The outside of the rotating rod 25 is coated with an elastic layer, which is advantageous in that the elastic layer can further enhance the supporting and limiting effect on the water bladder 22. The top of annular water pocket 22 is equipped with sliding sleeve 23, sliding sleeve 23 cup joints with outer tube 21 on, sliding sleeve 23's the outside is equipped with slip casting bag 24, all be equipped with the grout inlet corresponding with outer tube 21 bar hole position on slip casting bag 24 and the sliding sleeve 23, be equipped with out the thick liquid hole on the decurrent bottom surface of slip casting bag 24, the diameter in play thick liquid hole is less than the diameter in advance thick liquid hole, sliding sleeve 23 highly is greater than the length in outer tube 21 bar hole, seal through sliding sleeve 23 bar hole on the outer tube 21, then through the mode of outwards slip casting in with shutoff thick liquid 5 follow slip casting bag 24, make the injection distribution of thick liquid more even, the inflation of slip casting bag 24 is further sealed to gas collection hole simultaneously, be the malleation in the space that makes the slip casting, further guarantee the gas of below can not upwards spill over.
As shown in fig. 10, 11 and 12, in summary, the present embodiment further discloses a plugging method for a gas collecting hole plugging device, which includes the following specific plugging steps:
(1) carrying the device to the position right above the gas collecting hole;
(2) the outer sleeve 21 and the inner sleeve 2 are lowered into the gas collecting hole under the action of the first lifting mechanism and the second lifting mechanism;
(3) under the action of the first lifting mechanism, the inner sleeve 2 moves downwards until the rotating rod 25 is clamped in the gas collecting hole under the action of the elastic part 26;
(4) the pressurizing water injection device 3 injects water into the water bag 22 until the water bag 22 expands to block the gas collection hole;
(5) at the moment, injecting a polyurethane foaming agent or plugging slurry 5 into the gas collecting hole manually or mechanically;
(6) when the polyurethane foaming agent or the plugging slurry 5 is solidified, the inner sleeve 2 and the outer sleeve 21 are lifted upwards under the action of the first lifting mechanism and the second lifting mechanism, so that the sealing plate 29 is positioned above the polyurethane foaming layer or the solidified plugging slurry 5, the elastic connecting part 28 of the water bag 22 is separated from the outer sleeve 21 under the action of resistance, the water bag 22 is gathered inwards under the action of pressure, and the annular space in the middle of the water bag 22 is plugged;
(7) sliding the sliding sleeve 23 to the bottom end of the outer sleeve 21, and sealing the strip-shaped through hole by the sliding sleeve 23;
(8) the pressurized grouting device 4 injects plugging slurry 5 into the inner sleeve 2, the plugging slurry 5 enters from a slurry inlet hole of the grouting bag 24 through a strip-shaped hole, and is discharged from a slurry outlet hole, and a cavity is formed between the expansion of the grouting bag 24 and polyurethane foam or the first layer of plugging slurry as the diameter of the slurry inlet hole is larger than that of the slurry outlet hole;
(9) after the cavity in the step (8) is filled with the slurry, waiting for the slurry to solidify;
(10) after solidification is finished, under the action of the first lifting mechanism and the second lifting mechanism, the grouting bag 24 is lifted to the upper end of the gas cavity, and under the action of the pressurized grouting device 4, the gas collection hole is subjected to final grouting plugging.
It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A gas collecting hole plugging device is characterized by comprising a plugging grouting mechanism and a coaxial pipe lifting mechanism, wherein the coaxial pipe lifting mechanism drives the plugging grouting mechanism to move in a gas collecting hole;
the plugging grouting mechanism comprises an outer sleeve and an inner sleeve, the inner sleeve is connected to the inside of the outer sleeve in a sliding mode, the outer wall of the inner sleeve is in close contact with the inner wall of the outer sleeve, an annular water bag is arranged at the bottom of the outer sleeve, an elastic connecting part is arranged in the middle of the annular water bag and sleeved on the outer wall of the outer sleeve, a pressurizing water injection device is connected onto the water bag, a pressurizing grouting device is connected to the upper end of the inner sleeve, and the pressurizing water injection device and the pressurizing grouting device are both located on the ground of a coal mine roadway;
with spool hoist mechanism including annular installation seat, mirror image symmetry is equipped with elevating system on the annular installation seat, elevating system is including the first elevating system and the second elevating system that set up from top to bottom, be equipped with first fixture and second fixture on first elevating system and the second elevating system respectively, first fixture and second fixture carry out the centre gripping respectively to outer sleeve pipe and interior sheathed tube outer wall and fix, and the vertical upper and lower slip of first elevating system control outer tube that the symmetry set up, second elevating system is used for controlling interior vertical upper and lower slip of sleeve pipe.
2. The gas collecting hole blocking device according to claim 1, wherein the bottom ends of the inner sleeve and the outer sleeve are circumferentially and uniformly provided with strip-shaped through holes corresponding in position, the annular water bag is located above the strip-shaped through holes, a rotating shaft is arranged at the upper end of the strip-shaped through holes of the inner sleeve, a rotating rod is rotatably connected to the rotating shaft, the rotating rod can rotate in the strip-shaped through holes of the inner sleeve and the outer sleeve, the bottom end of the inner sleeve is provided with a bottom plate, the bottom plate is provided with elastic pieces corresponding to the rotating rod in number, one end of each elastic piece is fixedly connected with the bottom plate, the other end of each elastic piece is fixedly connected with the upper end of the corresponding rotating rod, and the elastic pieces are in a stretching state.
3. The gas collection hole plugging device according to claim 2, wherein a sealing plate is provided on a lower surface of said base plate, said sealing plate having a diameter larger than a diameter of said outer sleeve.
4. The gas collecting hole plugging device according to claim 2, wherein an elastic layer is coated on the outer side of the rotating rod.
5. The gas collecting hole plugging device according to claim 2, wherein a sliding sleeve is arranged above the annular water bag, the sliding sleeve is sleeved on the outer sleeve, a grouting bag is arranged outside the sliding sleeve, the grouting bag and the sliding sleeve are both provided with a grout inlet corresponding to the position of the strip-shaped hole of the outer sleeve, a grout outlet is arranged on the downward bottom surface of the grouting bag, the diameter of the grout outlet is smaller than that of the grout inlet, and the height of the sliding sleeve is larger than the length of the strip-shaped hole on the outer sleeve.
6. The gas collecting hole blocking device as claimed in claim 1, wherein the first lifting mechanism and the second lifting mechanism each comprise a mounting plate, a threaded rod is arranged on the inner side of the mounting plate, a sliding block is arranged on the threaded rod, guide rods are arranged on two sides of the threaded rod and are slidably connected with the sliding block, a driving motor is arranged at the upper end of the mounting plate, the output end of the driving motor is fixedly connected with the upper end of the threaded rod, and the first clamping mechanism and the second clamping mechanism are symmetrically arranged on the sliding blocks of the first lifting mechanism and the second lifting mechanism respectively.
7. The gas collecting hole blocking device as claimed in claim 6, wherein the first clamping mechanism and the second clamping mechanism each comprise a linear motor, a clamping portion is fixedly connected to an end of the linear motor, the clamping portion is a clamping plate, and the clamping plate is in an isosceles triangle shape.
8. The gas collecting hole plugging device according to claim 6, wherein the first elevating mechanism and the second elevating mechanism are symmetrically provided with a support plate on the slide block, the support plate is provided with a through hole at a middle portion thereof, the through hole is matched with the diameter of the outer sleeve and the inner sleeve, the inner sleeve and the outer sleeve are respectively located in the through holes corresponding to the inner sleeve and the inner sleeve, and the first clamping mechanism and the second clamping mechanism are provided on the support plate.
9. The gas collecting hole plugging device according to claim 7, wherein a non-slip pad is provided on the contact surface of the clamping plate and the inner sleeve or the outer sleeve.
10. The plugging method of the plugging device for the gas collection hole according to any one of claims 1 to 9, wherein the specific plugging steps are as follows:
(1) carrying the device to the position right above the gas collecting hole;
(2) the outer sleeve and the inner sleeve are lowered into the gas collecting hole under the action of the first lifting mechanism and the second lifting mechanism;
(3) under the action of the first lifting mechanism, the inner sleeve moves downwards until the rotating rod is clamped in the gas collecting hole under the action of the elastic part;
(4) the pressurized water injection device injects water into the water bag until the water bag expands to block the gas collection hole;
(5) at the moment, injecting a polyurethane foaming agent or plugging slurry into the gas collecting hole manually or mechanically;
(6) when the polyurethane foaming agent or the plugging slurry is solidified, the inner sleeve and the outer sleeve are lifted upwards under the action of the first lifting mechanism and the second lifting mechanism, so that the sealing plate is positioned above the polyurethane foaming layer or the solidified plugging slurry, the elastic connecting part of the water bag is separated from the outer sleeve under the action of resistance, and the water bag is gathered inwards under the action of pressure to plug the annular space in the middle of the water bag;
(7) sliding the sliding sleeve to the bottom end of the outer sleeve, and sealing the strip-shaped through hole by the sliding sleeve;
(8) the pressurized grouting device injects plugging slurry into the inner sleeve, the plugging slurry enters from a slurry inlet hole of the grouting bag through the strip-shaped hole and is discharged from a slurry outlet hole, and a cavity is formed between the expansion of the grouting bag and polyurethane foam or the first layer of plugging slurry as the diameter of the slurry inlet hole is larger than that of the slurry outlet hole;
(9) after the cavity in the step (8) is filled with the slurry, waiting for the slurry to solidify;
(10) after solidification is finished, under the action of the first lifting mechanism and the second lifting mechanism, the grouting bag is lifted to the upper end of the gas cavity, and under the action of the pressurized grouting device, the gas collection hole is subjected to final grouting plugging.
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