CN210599084U - Polyurethane hole sealing device for preventing underground spray hole from leaking - Google Patents
Polyurethane hole sealing device for preventing underground spray hole from leaking Download PDFInfo
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- CN210599084U CN210599084U CN201921540563.4U CN201921540563U CN210599084U CN 210599084 U CN210599084 U CN 210599084U CN 201921540563 U CN201921540563 U CN 201921540563U CN 210599084 U CN210599084 U CN 210599084U
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Abstract
Prevent in pit polyurethane hole sealing device that orifice was prevented leaking, including all taking out or the piezometric pipe that arranges along the fore-and-aft direction, first notes material pipe, second notes material pipe and gas injection or notes liquid pipe, take out or on the piezometric pipe by preceding first baffle that has set gradually backward, first polyurethane foaming bag, the second baffle, the third baffle, second polyurethane foaming bag and fourth baffle, form first hole sealing section between first baffle and the second baffle, form the elastic extrusion chamber between second baffle and the third baffle, form second hole sealing section between third baffle and the fourth baffle. The utility model discloses to bore broken coal petrography body adhesion formation a whole, block up the passageway that the gas flows, make the route of gas migration increase, frictional resistance increases, and pressure gradient does not change to increased the degree of difficulty of gas migration, improved the hole sealing effect greatly, reduced the injury of chemical agent to the human body simultaneously and reduced artificial physical power work load.
Description
Technical Field
The utility model belongs to the technical field of the safety in coal mine production, concretely relates to prevent polyurethane that orifice was prevented in pit and is prevented leaking hole device.
Background
The coal seam gas pressure is used as an important basic parameter of coal seam gas, and plays an important role in predicting coal seam outburst danger, detecting gas extraction effect and the like. Especially, in the process of measuring the gas pressure, due to the influences of factors such as the geological conditions of the coal bed, the hole sealing mode and the like, a certain difference is generated between the actual hole sealing effect of the drilled hole and the expected effect. How to improve the hole sealing effect has great significance to the measurement of the coal bed gas pressure.
For a high gas mine, the work of gas pre-extraction is a necessary link of mine safety production, and the hole sealing effect of a drilled hole is the first step of improving the extraction rate and the extraction effect. Although methods of drilling and sealing are increasing, each sealing method has its own advantages, disadvantages and application range.
The polyurethane is used for drilling and sealing holes, and the principle is as follows: the polyurethane A liquid and the polyurethane B liquid are fully mixed, the polyurethane has the characteristic of high expansibility, the polyurethane mixed liquid is placed in a drill hole, expansion is carried out in a short time to fill the space of the drill hole, the liquid polyurethane with adhesiveness enters the hole-cracks on the wall surface of the drill hole to block a gas flowing channel, and meanwhile, the broken coal-bearing rock bodies of the drill hole are absorbed and adhered to form a whole, so that the gas in a coal seam is prevented from flowing out of the vicinity of the wall surface of the drill hole, and the hole sealing effect is influenced. The following problems exist in the process of sealing the hole with polyurethane:
1) in the existing polyurethane hole sealing technology, when polyurethane is not completely solidified and the gas pressure in a coal seam is high in the initial hole sealing stage, a hole is extracted or flushed by a pressure measuring pipe, so that casualties and equipment damage around the hole can be caused;
2) before the polyurethane is expanded and hardened, air in a larger space exists in the drill hole, and in the closed drill hole, the air cannot be exhausted, and then the air can be compressed to enter hole-cracks on the wall surface of the drill hole, so that the polyurethane in an adhesion state cannot enter, a gas flowing channel cannot be blocked, and a coal-rock body in a drill hole crushing zone is absorbed and adhered to form a whole, and the crushing zone around the wall surface of the drill hole still has a channel provided for gas flowing, so that the hole sealing effect of the drill hole is influenced;
3) in the expansion hardening process of polyurethane, a certain degree of shrinkage phenomenon occurs, and holes appear due to shrinkage of the drilled holes originally filled with polyurethane, so that the hole sealing effect is influenced;
4) in the process of releasing the extraction or pressure measuring pipe, the pressure measuring pipe is placed in the center of the drill hole, particularly at the front end of the drill hole, and in the process of hole sealing, the extraction or pressure measuring pipe is located at the edge of the drill hole, so that the hole sealing is not facilitated, the hole sealing effect is influenced, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a polyurethane hole sealing device for preventing the blowout hole from leaking in the pit, which aims to solve the problems that in the prior art, because the polyurethane is not completely solidified and the gas pressure in the coal seam is higher, the drainage or pressure measuring pipe rushes out the drilled hole, and the casualties around the drilled hole can be caused; before the polyurethane is expanded and hardened, air in a larger space exists in the drill hole, and the air cannot be discharged in the middle of the closed drill hole, so that the air can be compressed to enter hole-cracks on the wall surface of the drill hole, and the polyurethane in an adhesion state cannot enter the hole-cracks, so that the hole sealing effect of the drill hole is influenced; in the expansion hardening process of polyurethane, a certain degree of shrinkage phenomenon occurs, and holes appear due to shrinkage of the drilled holes originally filled with polyurethane, so that the hole sealing effect is influenced; in the process of releasing, extracting or pressure measuring pipes, the extracting or pressure measuring pipes are always arranged in the center of the drill hole, hole sealing is facilitated, the hole sealing effect is improved, and the problem that polyurethane, a chemical agent, is not placed, harm to a human body is reduced and the like is solved.
In order to solve the technical problem, the utility model adopts the following technical scheme: a polyurethane hole sealing device for preventing an underground spray hole from leaking is characterized in that the direction from a drill hole opening to the hole bottom of a drill hole is used as a guide, the polyurethane hole sealing device sequentially comprises a pumping or pressure measuring pipe, a first injection pipe, a second injection pipe and a gas injection or liquid injection pipe which are arranged from front to back along the front-to-back direction, a first clapboard, a first polyurethane foaming bag, a second clapboard, a third clapboard, a second polyurethane foaming bag and a fourth clapboard are sequentially arranged on the pumping or pressure measuring pipe from front to back, a first hole sealing section is formed between the first clapboard and the second clapboard, an elastic extrusion cavity is formed between the second clapboard and the third clapboard, a second hole sealing section is formed between the third clapboard and the fourth clapboard, the first injection pipe penetrates through the first clapboard to be connected with the first polyurethane foaming bag, the second injection pipe penetrates through the first clapboard, the second clapboard from front to back, the third clapboard is connected with the second polyurethane foaming bag, and the gas injection or liquid injection pipe penetrates through the first clapboard, the second clapboard, the gas injection pipe and the second, The back of the second clapboard is communicated with the elastic extrusion cavity.
The first partition plate and the fourth partition plate are fixedly connected to the extraction or pressure measuring tube through fasteners, the second partition plate and the third partition plate are arranged on the extraction or pressure measuring tube through guide sleeves, certain friction force is formed between the inner walls of the guide sleeves and the outer circle of the extraction or pressure measuring tube, and rubber seal rings are arranged on the peripheries of the first partition plate, the second partition plate, the third partition plate and the fourth partition plate.
The second clapboard is provided with a first one-way valve which can flow in one way from the first hole sealing section to the elastic extrusion cavity, and the third clapboard is provided with a second one-way valve which can flow in one way from the second hole sealing section to the elastic extrusion cavity.
The front side surface of the fourth clapboard is provided with a rigid baffle positioned in the second hole sealing section; the rigid baffle is integrally in a conical cylinder structure with a thick front part and a thin rear part, the rigid baffle comprises an upper semi-conical cylinder and a lower semi-conical cylinder, and the rear end part of the upper semi-conical cylinder and the rear end part of the lower semi-conical cylinder are connected to the front side surface of the fourth baffle through hinges and torsional springs.
By adopting the technical scheme, the construction method of the polyurethane hole sealing device for preventing the underground blowout preventing hole from leaking comprises the following steps,
a. drilling holes by using a drilling machine to form a cylindrical hole, and then reaming the hole by using a hydraulic slotting measure to form at least two annular grooves;
b. installing a rigid baffle on the front side surface of a fourth clapboard, forming through holes for penetrating a first material injection pipe, a second material injection pipe and a gas injection or liquid injection pipe at eccentric positions of the first clapboard, the second clapboard and the third clapboard, installing rubber sealing rings on the peripheries of the first clapboard, the second clapboard, the third clapboard and the fourth clapboard, and respectively installing a first check valve and a second check valve on the second clapboard and the third clapboard;
c. sequentially installing a fourth partition plate, a second polyurethane foaming bag, a third partition plate, a second partition plate, a first polyurethane foaming bag and a first partition plate on an extraction or pressure measuring pipe from back to front;
d. the method comprises the following steps that a first injection pipe, a second injection pipe and an air injection or liquid injection pipe penetrate through corresponding through holes, the first injection pipe penetrates through a first partition plate and then is connected with a first polyurethane foaming bag through a quick plug, the second injection pipe penetrates through the first partition plate, a second partition plate and a third partition plate from front to back in sequence and then is connected with a second polyurethane foaming bag through the quick plug, the air injection or liquid injection pipe penetrates through the first partition plate and the second partition plate from front to back in sequence and then is communicated with an elastic extrusion cavity, and therefore the underground polyurethane hole sealing device for preventing and preventing jet holes and leakage is assembled;
e. the assembled polyurethane hole sealing device for preventing the underground spray hole from leaking is extended into the hole from the hole opening of the hole backwards, and when the first partition plate enters the hole and the rigid partition plate is positioned on the rear side of one of the annular grooves, the polyurethane hole sealing device for preventing the underground spray hole from leaking is stopped being conveyed backwards;
f. injecting polyurethane mixed liquid into the first hole sealing section and the second hole sealing section through the first material injection pipe and the second material injection pipe respectively to seal holes;
g. gas or liquid is injected into the elastic extrusion cavity through a gas or liquid injection pipe, so that the second partition plate and the third partition plate respectively extrude incompletely-hardened polyurethane forwards and backwards, and the hole sealing effect of the first hole sealing section and the second hole sealing section is improved;
h. after the polyurethane is completely hardened, a certain pressure is kept in the elastic extrusion cavity, so that the gas is prevented from further moving to the roadway, and a valve at the front port of the gas injection or liquid pipe is closed;
i. and (4) finishing all the drilling and hole sealing work, and starting to measure the coal seam gas pressure or develop the gas extraction work through an extraction or pressure measuring pipe.
The concrete process of the step f is that the feed inlets of the first material injection pipe and the second material injection pipe are respectively connected with the interfaces of the material injection pumps outside the holes, the polyurethane mixed liquid is respectively conveyed into the first polyurethane foaming bag and the second polyurethane foaming bag through the material injection pumps, and the polyurethane mixed liquid in the first polyurethane foaming bag and the second polyurethane foaming bag expands to break the polyurethane foaming bags into the holes until the whole spaces in the first hole sealing section and the second hole sealing section are filled; air in the space where the polyurethane is located is extruded by the air and enters the elastic extrusion cavity through the first one-way valve and the second one-way valve, so that the polyurethane can enter hole-cracks on the wall surface of the hole, and the coal and rock mass in the broken zone of the hole is adhered to form a whole to block a gas flowing channel; meanwhile, the polyurethane on the front side and the rear side of the elastic extrusion cavity can push the second partition plate to move backwards and the third partition plate to move forwards, so that the elastic extrusion space is reduced; and after the material injection is finished, the valves at the feeding ports of the two material injection pipes are closed.
And g, connecting an inlet of the gas or liquid injection pipe with a gas or liquid injection pump, injecting gas or liquid into the elastic extrusion space by the gas or liquid injection pump to a certain pressure, simultaneously pushing the second partition plate to move forwards and the third partition plate to move backwards to enlarge the elastic extrusion space, respectively extruding incompletely hardened polyurethane on the front side and the rear side by the second partition plate and the third partition plate, further improving the compactness of the polyurethane in the first hole sealing section and the second hole sealing section, and filling the pores shrunk due to hardening again.
At the initial stage of hole sealing, because polyurethane is not completely solidified, in the process of pumping or pressure measuring pipe punching out a drill hole, when gas pressure in a coal seam is high, the gas pressure at the bottom of the hole pushes the whole device to move forwards, when the front sides of an upper semi-conical cylinder and a lower semi-conical cylinder which are arranged on the front side surface of a fourth partition plate move forwards into adjacent annular grooves, under the action of a torsion spring, the upper semi-conical cylinder rotates upwards to enter the upper parts of the annular grooves, and the lower semi-conical cylinder rotates downwards to enter the lower parts of the annular grooves, so that the effect of a positioning device is achieved, and the situation of spraying holes is avoided.
The utility model has the advantages that:
(1) the utility model discloses the rigidity that passes through torsional spring and hinged joint some cylinders at fourth baffle front side separates the fender ware, the ring channel that forms after the hole inner wall passes through the water conservancy slot reaming. When the polyurethane is not completely solidified and the gas pressure in the coal seam is high in the initial hole sealing stage, in the process of extracting or pressure measuring pipe punching out a drill hole, the rigid baffle moves forwards to the cylindrical hole, the front side of the circular rigid baffle enters the annular groove under the driving of the torsion spring, so that the positions of the fourth baffle and the extracting or pressure measuring pipe are limited, the extracting or pressure measuring pipe is prevented from punching out the drill hole, and possible casualties and equipment damage around the drill hole are avoided
(2) The utility model discloses a ring channel that forms behind the water conservancy slot in the hole, in polyurethane inflation sclerosis process, be full of the drilling of polyurethane. Under the pressure gradient of coal seam gas, the gas is originally transported along a broken zone near the wall surface of a drill hole in a straight line, the annular groove formed after hydraulic cutting is filled with polyurethane, the path of the gas transport is increased, the friction resistance is increased, and the pressure gradient is unchanged, so that the difficulty of the gas transport is increased, and the hole sealing effect is improved.
(3) The utility model discloses a hole at second baffle and third baffle is passed through the guide pin bushing and is connected on taking out and adopt or the piezometer tube, and the guide pin bushing inner wall with take out and have certain frictional force between taking out or the piezometer tube excircle, can guarantee its leakproofness to can follow and take out or the piezometer tube removes after receiving certain pressure, install first check valve and second check valve simultaneously on second baffle and third baffle. Before the polyurethane is expanded and hardened, air in a larger space exists in the hole, in the expansion process, the air in the closed hole is extruded and discharged by the polyurethane and enters the elastic extrusion cavity through the first one-way valve and the second one-way valve, so that the adhered polyurethane can enter the hole-cracks on the wall surface of the hole, the coal-rock mass in the broken coal zone of the drill hole is adhered to form a whole, a gas flowing channel is blocked, and the hole sealing effect of the hole is improved.
(4) In the expansion hardening process of polyurethane, a certain degree of shrinkage phenomenon can occur, gas or liquid is injected into the elastic extrusion cavity through the gas injection (or liquid) pipe, the internal pressure of the elastic extrusion cavity is increased, the guide sleeves of the second partition plate and the third partition plate are driven to move along the extraction or pressure measuring pipe, the polyurethane which is not completely hardened on two sides is extruded, and the pores generated due to shrinkage are filled again, so that the hole sealing effect of the hole is improved.
(5) The utility model discloses a before, in and the rear portion of putting and taking out or the pressure-measuring pipe all is provided with the baffle, takes out and takes out or the pressure-measuring pipe arranges the central line position of hole in all the time, is carrying out the hole sealing in-process, avoids taking out and takes out or the pressure-measuring pipe is located the edge of hole and is unfavorable for the hole sealing, and then influences the appearance of hole sealing effect scheduling problem to improve the hole sealing effect of drilling.
(6) After the polyurethane is expanded and hardened, gas or liquid is injected into the elastic extrusion cavity through a gas injection or liquid pipe, and the internal pressure of the elastic extrusion cavity is increased to a certain pressure value. Gas near the rear port of the pressure measuring pipe or the extraction pipe at the deep part of the hole is transported under the pressure gradient, and the higher pressure exists at the elastic extrusion cavity, so that the gas is prevented from further transporting to the roadway, and the hole sealing effect of the hole is improved; meanwhile, gas or liquid with certain pressure is filled in the elastic extrusion cavity, so that the effect of secondary hole sealing can be achieved under the condition that the previous hole sealing effect fails, and a standby scheme is provided for improving the hole sealing effect.
(7) The utility model discloses an at the in-process of putting and taking out or the piezometer pipe, do not use polyurethane, reduce the injury of chemical agent to the human body and reduce artificial physical work load to avoided because polyurethane inflation hardening time is fast and can't carry out the disadvantage of longer distance's drilling hole sealing.
Drawings
FIG. 1 is a schematic structural view of the present invention before injecting polyurethane;
fig. 2 is a schematic structural diagram of the present invention after injecting polyurethane.
Detailed Description
As shown in figures 1 and 2, the utility model discloses a prevent polyurethane hole sealing device of orifice leakage in pit to the direction of the drill way to the hole bottom of drilling is by the front to back, including all along the drainage or pressure-measuring pipe 1, first notes material pipe 2, second notes material pipe 3 and gas injection or annotate liquid pipe 4 that the fore-and-aft direction arranged, drainage or pressure-measuring pipe 1 is last by the front to back first baffle 5, first polyurethane foaming bag 6, second baffle 7, third baffle 8, second polyurethane foaming bag 9 and fourth baffle 10 have set gradually, form first hole sealing section 11 between first baffle 5 and the second baffle 7, form elastic extrusion chamber 12 between second baffle 7 and the third baffle 8, form second hole sealing section 13 between third baffle 8 and the fourth baffle 10, first notes material pipe 2 passes first baffle 5 and is connected with first polyurethane foaming bag 6, second notes material pipe 3 is by preceding first baffle 5 of passing backward in proper order, The second clapboard 7 and the third clapboard 8 are connected with a second polyurethane foaming bag 9, and the gas injection or liquid injection pipe 4 sequentially passes through the first clapboard 5 and the second clapboard 7 from front to back and then is communicated with the elastic extrusion cavity 12.
The first partition plate 5 and the fourth partition plate 10 are fixedly connected to the extraction or pressure measuring tube 1 through fasteners 14, the second partition plate 7 and the third partition plate 8 are arranged on the extraction or pressure measuring tube 1 through guide sleeves 15, certain friction force is provided between the inner walls of the guide sleeves 15 and the outer circle of the extraction or pressure measuring tube 1, and rubber seal rings 16 are arranged on the peripheries of the first partition plate 5, the second partition plate 7, the third partition plate 8 and the fourth partition plate 10.
The second clapboard 7 is provided with a first one-way valve 17 which can flow from the first hole sealing section 11 to the elastic extrusion cavity 12 in a one-way, and the third clapboard 8 is provided with a second one-way valve 18 which can flow from the second hole sealing section 13 to the elastic extrusion cavity 12 in a one-way.
The front side surface of the fourth clapboard 10 is provided with a rigid clapboard positioned in the second hole sealing section 13; the rigid baffle is integrally in a conical cylinder structure with a thick front part and a thin rear part, the rigid baffle comprises an upper semi-conical cylinder 19 and a lower semi-conical cylinder 20, and the rear end part of the upper semi-conical cylinder 19 and the rear end part of the lower semi-conical cylinder 20 are connected to the front side surface of the fourth partition plate 10 through hinges and torsion springs.
The construction method of the polyurethane hole sealing device for preventing the spray holes from leaking in the pit comprises the following steps,
a. drilling underground by using a drilling machine to form a cylindrical hole 21, and then reaming the hole 21 by using a hydraulic slotting measure to form at least two annular grooves 22;
b. mounting a rigid baffle on the front side surface of a fourth clapboard 10, opening through holes for penetrating a first injection pipe 2, a second injection pipe 3 and an air injection or injection pipe 4 at eccentric positions of a first clapboard 5, a second clapboard 7 and a third clapboard 8, mounting rubber sealing rings 16 on the peripheries of the first clapboard 5, the second clapboard 7, the third clapboard 8 and the fourth clapboard 10, and mounting a first check valve 17 and a second check valve 18 on the second clapboard 7 and the third clapboard 8 respectively;
c. sequentially installing a fourth partition plate 10, a second polyurethane foaming bag 9, a third partition plate 8, a second partition plate 7, a first polyurethane foaming bag 6 and a first partition plate 5 on the extraction or pressure measuring pipe 1 from back to front;
d. a first injection pipe 2, a second injection pipe 3 and an air injection or liquid injection pipe 4 penetrate through corresponding through holes, the first injection pipe 2 penetrates through a first partition plate 5 and then is connected with a first polyurethane foaming bag 6 through a quick plug, the second injection pipe 3 sequentially penetrates through the first partition plate 5, a second partition plate 7 and a third partition plate 8 from front to back and then is connected with a second polyurethane foaming bag 9 through a quick plug, the air injection or liquid injection pipe 4 sequentially penetrates through the first partition plate 5 and the second partition plate 7 from front to back and then is communicated with an elastic extrusion cavity 12, and the underground polyurethane hole sealing device for preventing and preventing jet holes and leakage is assembled;
e. the assembled polyurethane hole sealing device for preventing the downhole jet orifice from leaking is extended into the hole 21 from the orifice of the hole 21 backwards, and when the first clapboard 5 enters the hole 21 and the rigid clapboard is positioned at the rear side of one annular groove 22, the polyurethane hole sealing device for preventing the downhole jet orifice from leaking is stopped being conveyed backwards;
f. injecting polyurethane mixed liquor into the first hole sealing section 11 and the second hole sealing section 13 through the first injection pipe 2 and the second injection pipe 3 respectively for hole sealing;
g. gas or liquid is injected into the elastic extrusion cavity 12 through the gas or liquid injection pipe 4, so that the second partition plate 7 and the third partition plate 8 respectively extrude incompletely hardened polyurethane forwards and backwards, and the hole sealing effect of the first hole sealing section 11 and the second hole sealing section 13 is improved;
h. after the polyurethane is completely hardened, a certain pressure is kept in the elastic extrusion cavity 12, so that the gas is prevented from further moving to the roadway, and a valve at the front port of the gas injection or liquid pipe is closed;
i. and (3) finishing all the drilling and hole sealing work, and starting to measure the coal seam gas pressure or develop the gas extraction work through the extraction or pressure measuring pipe 1.
The concrete process of the step f is that the feed inlets of the first injection pipe 2 and the second injection pipe 3 are respectively connected with the injection pump interface outside the hole 21, the polyurethane mixed liquid is respectively conveyed into the first polyurethane foaming bag 6 and the second polyurethane foaming bag 9 through the injection pump, and the polyurethane mixed liquid in the first polyurethane foaming bag 6 and the second polyurethane foaming bag 9 expands to break the polyurethane foaming bags into the hole 21 until the space in the whole first hole sealing section 11 and the whole second hole sealing section 13 is filled; air in the space where the polyurethane is located is extruded by the air and enters the elastic extrusion cavity 12 through the first one-way valve 17 and the second one-way valve 18, so that the polyurethane can enter hole-cracks on the wall surface of the hole 21, and the crushed coal-rock body in the hole 21 is adhered to form a whole to block a gas flowing channel; meanwhile, the polyurethane on the front side and the rear side of the elastic extrusion cavity can push the second partition plate 7 to move backwards and the third partition plate 8 to move forwards, so that the elastic extrusion space is reduced; and after the material injection is finished, the valves at the feeding ports of the two material injection pipes are closed.
And g, connecting an inlet of the gas or liquid injection pipe with a gas or liquid injection pump, injecting gas or liquid into the elastic extrusion space by the gas or liquid injection pump to a certain pressure, simultaneously pushing the second partition plate 7 to move forwards and the third partition plate 8 to move backwards to enlarge the elastic extrusion space, respectively extruding the incompletely hardened polyurethane on the front side and the rear side by the second partition plate 7 and the third partition plate 8, further improving the compactness of the polyurethane inside the first hole sealing section 11 and the second hole sealing section 13, and filling the pores shrunk due to hardening again.
In the initial stage of hole sealing, because polyurethane is not completely solidified, in the process of extracting or flushing a drill hole by the piezometer tube 1, when the gas pressure in a coal seam is high, the gas pressure at the bottom of the hole 21 pushes the whole device to move forwards, when the front sides of the upper semicircular cylinder 19 and the lower semicircular cylinder 20 arranged on the front side surface of the fourth partition plate 10 move forwards into the adjacent annular groove 22, under the action of the torsion spring, the upper semicircular cylinder 19 rotates upwards to enter the upper part of the annular groove 22, and the lower semicircular cylinder 20 rotates downwards to enter the lower part of the annular groove 22, so that the effect of a positioning device is achieved, and the situation of spraying holes is avoided.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.
Claims (4)
1. Prevent in pit that orifice prevents polyurethane hole sealing device of leaking, its characterized in that: the device takes the direction from the hole opening of a drill hole to the hole bottom as a guide, and sequentially comprises an extraction or pressure measuring pipe, a first injection pipe, a second injection pipe and a gas injection or liquid injection pipe which are arranged from front to back, wherein the extraction or pressure measuring pipe is sequentially provided with a first clapboard, a first polyurethane foaming bag and a second clapboard from front to back, the third baffle, second polyurethane foaming bag and fourth baffle, form first hole sealing section between first baffle and the second baffle, form the elasticity extrusion chamber between second baffle and the third baffle, form second hole sealing section between third baffle and the fourth baffle, first notes material pipe passes first baffle and is connected with first polyurethane foaming bag, the second is annotated the material pipe and is passed first baffle by preceding in proper order backward, the second baffle, be connected with second polyurethane foaming bag behind the third baffle, the gas injection or annotate the liquid pipe and pass first baffle by preceding in proper order backward, behind the second baffle with elasticity extrusion chamber intercommunication.
2. The polyurethane hole sealing device of claim 1, wherein: the first partition plate and the fourth partition plate are fixedly connected to the extraction or pressure measuring tube through fasteners, the second partition plate and the third partition plate are arranged on the extraction or pressure measuring tube through guide sleeves, friction force is formed between the inner walls of the guide sleeves and the outer circle of the extraction or pressure measuring tube, and rubber seal rings are arranged on the peripheries of the first partition plate, the second partition plate, the third partition plate and the fourth partition plate.
3. The polyurethane hole sealing device of claim 1, wherein: the second clapboard is provided with a first one-way valve which can flow in one way from the first hole sealing section to the elastic extrusion cavity, and the third clapboard is provided with a second one-way valve which can flow in one way from the second hole sealing section to the elastic extrusion cavity.
4. The polyurethane hole sealing device of claim 1, wherein: the front side surface of the fourth clapboard is provided with a rigid baffle positioned in the second hole sealing section; the rigid baffle is integrally in a conical cylinder structure with a thick front part and a thin rear part, the rigid baffle comprises an upper semi-conical cylinder and a lower semi-conical cylinder, and the rear end part of the upper semi-conical cylinder and the rear end part of the lower semi-conical cylinder are connected to the front side surface of the fourth baffle through hinges and torsional springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540563.4U CN210599084U (en) | 2019-09-17 | 2019-09-17 | Polyurethane hole sealing device for preventing underground spray hole from leaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540563.4U CN210599084U (en) | 2019-09-17 | 2019-09-17 | Polyurethane hole sealing device for preventing underground spray hole from leaking |
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| Publication Number | Publication Date |
|---|---|
| CN210599084U true CN210599084U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921540563.4U Active CN210599084U (en) | 2019-09-17 | 2019-09-17 | Polyurethane hole sealing device for preventing underground spray hole from leaking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513142A (en) * | 2019-09-17 | 2019-11-29 | 河南理工大学 | The polyurethane sealing aperture apparatus and its construction method of Underwell anti-injection hole anti-leak |
| CN113719255A (en) * | 2021-09-17 | 2021-11-30 | 河南理工大学 | Top directional long-drill-hole fractured zone gas extraction hole sealing method |
-
2019
- 2019-09-17 CN CN201921540563.4U patent/CN210599084U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513142A (en) * | 2019-09-17 | 2019-11-29 | 河南理工大学 | The polyurethane sealing aperture apparatus and its construction method of Underwell anti-injection hole anti-leak |
| CN110513142B (en) * | 2019-09-17 | 2024-03-01 | 河南理工大学 | Underground polyurethane hole sealing device capable of preventing spray holes from leakage and construction method thereof |
| CN113719255A (en) * | 2021-09-17 | 2021-11-30 | 河南理工大学 | Top directional long-drill-hole fractured zone gas extraction hole sealing method |
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