CN115929386A - Blowout preventer for internal and external extraction of drill hole construction for AHB type mine gas control - Google Patents

Abstract

The invention relates to the technical field of gas extraction, and discloses an internal and external extraction blowout preventer for an AHB type mine gas control borehole construction hole, which comprises an in-hole extraction blowout preventer, a self-sealing gas-water-slag separation and collection extractor and a U-shaped extraction water-proof device, wherein the self-sealing gas-water-slag separation and collection extractor comprises a gas separation bin and a disc type separation bin which are distributed up and down, and six self-shaking-off filter screens which rotate by taking the circle center of the disc type separation bin as a rotation center are arranged in the disc type separation bin; the filter screen has the advantages that the filter screen at the initial stage is guaranteed to have the self-cleaning purpose through the blocking and contact processes of the self-shaking filter screen by the protruding blocks, meanwhile, the filter screen plays a role in assisting the pulverized coal, so that the blocking condition that gas is not smoothly discharged due to the fact that the filter screen is insufficient in filtering effect is avoided, the long-time extraction process is met, and the gas leakage condition caused by filter screen replacement is avoided.

Description

Blowout preventer for internal and external extraction of drill hole construction for AHB type mine gas control

Technical Field

The invention relates to the technical field of gas extraction, in particular to an internal and external extraction blowout preventer for an AHB type mine gas control drilling construction hole.

Background

The advanced construction extraction pressure relief drill hole adopts a traditional construction process of an orifice extractor and a separation extractor, orifice blockage, unsmooth slag extraction and rapid increase of pressure in the hole often occur to burst injection of a large amount of coal and high-concentration gas, the frequency of accidents of burst injection of coal and gas overrun is caused, the safety production of a mine is seriously threatened, and the traditional inspection extraction box is easy to cause the leakage of gas in the traditional inspection extraction box in the slag discharge process, so that the phenomenon of roadway overrun often occurs;

the collector is often connected at the end of taking out the ware for filter the cinder, discharge the gas, when taking out to the continuity, the jam speed of filter screen is relevant with emission and duration, block up the back, cause the gas extraction route and the inside residual gas extraction route of cinder can't smoothly discharge, cause the gas to reveal easily in the filter screen treatment process this moment, when long-time extraction or eruption simultaneously, when the inside buggy collection volume of collector increases, also appear a small amount of gas easily and discharge along the buggy space when discharging the buggy.

Disclosure of Invention

The invention aims to provide an AHB type mine gas treatment borehole construction in-hole and out-hole extraction blowout preventer, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the internal and external extraction blowout preventer for the AHB type mine gas treatment borehole construction comprises an in-hole extraction blowout preventer, a self-sealing gas-water-slag separation and collection extractor and a U-shaped extraction water preventer, wherein the in-hole extraction blowout preventer, the self-sealing gas-water-slag separation and collection extractor and the U-shaped extraction water preventer are sequentially communicated;

the in-hole extraction blowout preventer comprises an extraction pipe arranged at the drill hole, and an extraction hose and a slag discharge hose are fixedly connected to the side surface of the extraction pipe;

the self-sealing gas-water-slag separation, collection and extraction device comprises a gas separation bin and a disc type separation bin which are distributed up and down, wherein the side surface of the disc type separation bin is fixedly connected with a gas inlet branch pipe and a slag inlet branch pipe, the gas inlet branch pipe is communicated with the extraction hose, the slag inlet branch pipe is communicated with the slag discharge hose, and the gas separation bin is communicated with the disc type separation bin;

six self-shaking-off filter screens rotating by taking the circle center of the disc type separation bin as a rotation center are arranged in the disc type separation bin, and a plurality of protruding blocks distributed at angles are fixedly connected to the bottom of the inner wall of the disc type separation bin and used for enabling the self-shaking-off filter screens to generate instant contact shaking-off particles with the protruding blocks when the self-shaking-off filter screens rotate;

the U-shaped extraction waterproof device comprises a low-negative-pressure extraction branch pipe and a U-shaped pipe, one end of the U-shaped pipe is communicated with the low-negative-pressure extraction branch pipe, and the other end of the U-shaped pipe extends to the top of the gas separation bin and is communicated with the gas separation bin.

As a still further scheme of the invention: the gas inlet branch pipe and the slag inlet branch pipe are vertically distributed on one side, close to the extraction pipe, of the disc type separation bin, a center shaft is rotatably connected to the circle center of the disc type separation bin, six self-shaking-off filter screens are annularly distributed on the periphery of the center shaft, the self-shaking-off filter screens are rotatably connected with the center shaft through one-way elastic hinge mechanisms, and the gas inlet branch pipe and the slag inlet branch pipe are respectively located above and below the center shaft.

As a still further scheme of the invention: the improved separation device is characterized in that a primary slag discharge pipe is fixedly connected under the disc type separation bin, one side of the primary slag discharge pipe is connected with a bent discharge pipe, the top of the bent discharge pipe is hinged with a sealing cover, an extension collector is fixedly connected under one side of the air inlet branch pipe and far away from the disc type separation bin, the extension collector is communicated with the disc type separation bin, the protruding block covers the extension collector, and the lowest end of the extension collector is communicated with the primary slag discharge pipe through a slag discharge communicating pipe.

As a still further scheme of the invention: the automatic air-sealing water-slag separation collection and extraction device is characterized in that two inclined screen meshes which are obliquely arranged are arranged inside the air separation bin, a water baffle is fixedly connected to the top of the inner wall of the air separation bin, the bottom of the air separation bin is communicated with an opening right above the disc type separation bin through a contraction port, the automatic air-sealing water-slag separation collection and extraction device further comprises a liquid supply pipeline, the liquid supply pipeline is respectively communicated with a spray head and a water gun, the spray head is located right above the air separation bin, and the water gun is located on one side of the primary slag discharge pipe.

As a still further scheme of the invention: two vertical portions of U-shaped pipe communicate through transverse distribution's air siphunculus, the arc bottom center department fixedly connected with secondary scum pipe of U-shaped pipe, one side intercommunication of secondary scum pipe has the self-draining pipe.

Compared with the prior art, the invention has the beneficial effects that:

the rotary self-shaking-off filter screen rotates in the disc type separation bin, impurities in gas entering the disc type separation bin from the air inlet branch pipe are filtered and then rotate to the lower side, coal powder is pushed to move, meanwhile, the gas in the coal powder is filtered, when the filter screen moves to the protruding block, the impurities on the filter screen are shaken off in the blocking and contact processes of the protruding block on the self-shaking-off filter screen, the purpose of self-cleaning of the filter screen in the initial stage is guaranteed, meanwhile, the filter screen plays a power assisting role in the coal powder, the blocking condition that gas is not smoothly discharged due to insufficient filter effect of the filter screen is avoided, the gas leakage condition caused by filter screen replacement is avoided in the long-time extraction process;

through the influence of liquid, after impurities flow through the liquid, the liquid jacks up a plate body at the end part of the bent discharge pipe, and the liquid together with pulverized coal impurities is discharged, so that the impurities in the disc type separation bin are not excessive, and meanwhile, the liquid plugs the bottom of the primary slag discharge pipe, so that gas is difficult to pass through, the effect of sealing bottom discharge is realized, continuous discharge is realized, gas leakage is avoided, the device can be applied to the gas extraction work with a long period, and the use safety is ensured;

after gas gets into through the U-shaped pipe, liquid can receive the gravity influence to pile up inside U-shaped pipe circular arc department, and gas this moment can directly get into the other end of U-shaped pipe through the gas siphunculus, thereby it takes out to take out the branch pipe through low negative pressure, and then be connected with automatic water repellent from the drain pipe this moment, automatic water trap this moment can control waterproofly according to the inside liquid level height of secondary row sediment, make the inside liquid level height of secondary row sediment be higher than the height from the drain pipe all the time, thereby make from the drain pipe be in the atmoseal state all the time, thereby form closed cycle drainage, this mode also is applied to long period's continuation gas extraction, avoid gas leakage simultaneously, make the device can realize continuation work.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic perspective sectional view of an internal and external extraction blowout preventer for AHB type mine gas control drilling construction;

FIG. 2 is a schematic view of the inside and outside extraction blowout preventer in an AHB type mine gas treatment borehole construction hole;

in the figure: 100. extracting a blowout preventer in the hole; 200. a self-sealing gas-water-slag separation collection extractor; 300. a U-shaped drainage water-proof device; 1. extracting pipes; 11. extracting the hose; 12. a slag discharge hose; 2. a gas separation bin; 21. a water baffle; 22. an inclined screen mesh; 23. a constriction; 3. a disc type separation bin; 31. an intake branch pipe; 32. a slag inlet branch pipe; 33. a convex block; 34. an extension collector; 341. a slag discharge communicating pipe; 35. a primary deslagging pipe; 351. bending the discharge pipe; 4. self-shaking off the filter screen; 41. a central shaft; 42. a unidirectional elastic hinge mechanism; 5. a liquid supply line; 51. a spray head; 52. a water gun; 6. extracting branch pipes at low negative pressure; 7. a U-shaped tube; 71. a gas-through pipe; 72. a secondary deslagging pipe; 73. and (4) a self-draining pipe.

Detailed Description

The self-sealing gas-water-slag separation and collection device comprises a blowout preventer 100 for extraction in a hole, a self-sealing gas-water-slag separation and collection device 200 and a U-shaped extraction water preventer 300, wherein the blowout preventer 100 for extraction in the hole, the self-sealing gas-water-slag separation and collection device 200 and the U-shaped extraction water preventer 300 are sequentially communicated;

the in-hole extraction blowout preventer 100 is deeply inserted into the borehole and used for extracting gas, coal dust residues and the like in the hole, a large amount of gas and coal dust residues enter the self-sealing gas-water-residue separation and collection extractor 200 for collection and temporary storage, and meanwhile, during extraction, the gas is subjected to secondary treatment through the U-shaped extraction blowout preventer 300;

the in-hole extraction blowout preventer 100 comprises an extraction pipe 1 arranged at a drill hole, and the side surface of the extraction pipe 1 is fixedly connected with an extraction hose 11 and a slag discharge hose 12;

the gas discharged through the extraction pipe 1 enters the self-sealing gas-water-slag separation and collection and extraction device 200 through the extraction hose 11, and the residue and the gas discharged through the extraction pipe 1 are discharged into the self-sealing gas-water-slag separation and collection and extraction device 200 through the slag discharge hose 12;

the self-sealing gas water-slag separating, collecting and pumping device 200 comprises a gas separating bin 2 and a disc type separating bin 3 which are distributed up and down, wherein a gas inlet branch pipe 31 and a slag inlet branch pipe 32 are fixedly connected to the side surface of the disc type separating bin 3, the gas inlet branch pipe 31 is communicated with an extraction hose 11, the slag inlet branch pipe 32 is communicated with a slag discharge hose 12, the gas separating bin 2 is communicated with the disc type separating bin 3, six self-shaking-off filter screens 4 which rotate by taking the circle center of the disc type separating bin 3 as a rotation center are arranged inside the disc type separating bin 3, a plurality of protruding blocks 33 distributed at angles are fixedly connected to the bottom of the inner wall of the disc type separating bin 3 and used for enabling the self-shaking-off filter screens 4 to be in instant contact with the protruding blocks 33 and shaking-off particles when the self-shaking-off filter screens 4 rotate, the gas inlet branch pipe 31 and the slag inlet branch pipe 32 are distributed up and down on one side of the disc type separating bin 3 close to the extraction hose 1, a center circle center shaft 41 is rotatably connected to the disc type separating bin 3, the six self-shaking-off filter screens 4 are circularly distributed on the periphery of the center shaft 41, and the self-shaking-off filter screens 4 are rotatably connected with the center shaft 41 through a one-way elastic hinge mechanism 42;

the gas extracted by the extraction hose 11 at the initial stage contains a small amount of coal dust impurities and enters the disc type separation bin 3, meanwhile, a large amount of coal dust impurities also enter the disc type separation bin 3, the disc type separation bin 3 is internally and rotatably connected with the self-shaking-off filter screen 4, the self-shaking-off filter screen 4 rotates towards one side of the air inlet branch pipe 31, at the moment, the six self-shaking-off filter screens 4 divide the disc type separation bin 3 into six subareas, the air inlet branch pipe 31 and the slag inlet branch pipe 32 are respectively distributed up and down, the sprayed gas carries a small amount of coal dust and can be filtered by the self-shaking-off filter screen 4 above, the filtered gas is sucked and lifted to the inside of the gas separation bin 2, at the moment, a large amount of coal slag sprayed by the slag inlet branch pipe 32 only contains a small amount of residual gas, at the moment, the coal slag descends along with the rotation of the self-shaking-off filter screen 4 to push the coal slag to move downwards, meanwhile, gas is sucked and rises to the inside of the gas separation bin 2 through a plurality of filter screens, when the self-shaking filter screen 4 rotates to a position close to the lower part of one side of the slag inlet branch pipe 32, the gas is acted by the convex block 33 at the moment, the one-way elastic hinge mechanism 42 at the central shaft 41 rotates at a certain angle because the self-shaking filter screen 4 is blocked by the slag inlet branch pipe 32, at the moment, the one-way elastic hinge mechanism 42 rotates to store energy, the convex block 33 is arc-shaped, at the moment, the self-shaking filter screen 4 rotates to incline and is separated from the convex block 33, the self-shaking filter screen 4 is separated from the limiting effect of the convex block 33, so that the self-shaking filter screen 4 is quickly reset under the elastic influence of a torsion spring in the one-way elastic hinge mechanism 42 and is contacted with the subsequent convex block 33, at the moment, the self-shaking filter screen 4 shakes, and accordingly, and surface impurities directly filtered by the gas inlet branch pipe 31 are shaken to the inside of the primary slag outlet pipe 35 Meanwhile, the self-shaking-off filter screen 4 continuously rotates along with the central shaft 41, the self-shaking-off filter screen starts to ascend through the primary slag discharge pipe 35, the self-shaking-off filter screen 4 after ascending is continuously deformed under the influence of the convex block 33 until the next convex block 33 is instantly contacted, the shaking-off surface at the moment is a direct injection surface of the slag inlet branch pipe 32, the direct injection surface is influenced by shaking, impurities are directly shaken off downwards, particles enter the primary slag discharge pipe 35 to be collected, the self-shaking-off filter screen 4 after being cleaned through the convex block 33 rotates to the air inlet branch pipe 31 and continuously moves, the central shaft 41 provides power through an explosion-proof motor, the central shaft 41 is connected with the disc type separation bin 3 through an explosion-proof bearing, the frame body of the self-shaking-off filter screen 4 and the convex block 33 are made of plastics, sparks generated by metal collision are avoided, a large amount of coal slag and coal slag in gas pumping gas can be filtered at the initial stage through the self-shaking-off effect, the filtering blockage period is greatly prolonged, and the filtering efficiency and the service life are effectively improved;

the U-shaped extraction water-proof device 300 comprises a low negative pressure extraction branch pipe 6 and a U-shaped pipe 7, wherein one end of the U-shaped pipe 7 is communicated with the low negative pressure extraction branch pipe 6, and the other end of the U-shaped pipe 7 extends to the top of the gas separation bin 2 to be communicated with the gas separation bin 2;

a flange plate interface at one end of the U-shaped pipe 7 is connected with an interface of the construction roadway low negative pressure extraction branch pipe 6, and a flange plate interface at the other end of the U-shaped pipe 7 is connected with an extraction port of the gas separation bin 2, so that the continuous extraction of gas sprayed in the hole is realized;

a primary slag discharge pipe 35 is fixedly connected right below the disc type separation bin 3, one side of the primary slag discharge pipe 35 is connected with a bent discharge pipe 351, the top of the bent discharge pipe 351 is hinged with a sealing cover, an extension collector 34 is fixedly connected below one side, far away from the air inlet branch pipe 31, of the disc type separation bin 3, the extension collector 34 is communicated with the disc type separation bin 3, a protruding block 33 covers the extension collector 34, the lowest end of the extension collector 34 is communicated with the primary slag discharge pipe 35 through a slag discharge communicating pipe 341, two inclined screens 22 which are obliquely arranged are arranged inside the gas separation bin 2, a water baffle 21 is fixedly connected to the top of the inner wall of the gas separation bin 2, the bottom of the gas separation bin 2 is communicated with an opening right above the disc type separation bin 3 through a contraction port 23, the self-sealing gas-water-slag separation and collection and extraction device 200 further comprises a water supply pipeline 5, the water supply pipelines 5 are respectively communicated with spray heads 51 and 52, the spray heads 51 are located right above the gas separation bin 2, and the 52 are located on one side of the primary slag discharge pipe 35;

residue inside the disc type separation bin 3, material can enter the inside of the primary slag discharging pipe 35, accumulation is generated inside the primary slag discharging pipe 35, and in order to realize continuous discharging and avoid blockage, therefore, the bent discharging pipe 351 is arranged on one side of the primary slag discharging pipe 35, the end part of the bent discharging pipe 351 is bent upwards, the port of the primary slag discharging pipe 35 is also upwards, so that a U-shaped pipeline is formed, liquid is rapidly flushed into the primary slag discharging pipe 35 through the water gun 52 at the moment, the liquid level inside the primary slag discharging pipe 35 is suddenly raised, the liquid level at the end part of the bent discharging pipe 351 is flush with the liquid level inside the primary slag discharging pipe 35, the spray head 51 continuously flushes water, impurity dust drops into the primary slag discharging pipe 35, and after the impurities flow through the liquid, the liquid jacks up the plate body at the end part of the bent discharging pipe 351 to discharge the liquid together with pulverized coal impurities, thereby ensuring that the impurities in the disc type separation bin 3 are not excessive, simultaneously sealing the bottom of the primary slag discharge pipe 35 by liquid to make the gas difficult to pass through, thereby realizing the effect of discharging and sealing the bottom, realizing continuous discharging, simultaneously avoiding gas leakage, ensuring that the device can be applied to the gas extraction work with long period, ensuring the use safety, simultaneously, the gas is sucked to move upwards after being filtered by the self-shaking-off filter screen 4, at the moment, the gas is secondarily filtered by the inclined screen 22, simultaneously, the dust in the extracted gas can be further reduced by utilizing the injection of the spray head 51, simultaneously, the liquid flows into the primary slag discharge pipe 35 after being subjected to the gravity influence and being collected by the contraction port 23, further playing a sealing role, and the purpose of arranging the water baffle plate 21 is to avoid the direct injection of water mist, and the extraction port is directly pumped to the U-shaped pipe 7, causing the liquid level storage capacity in the U-shaped pipe 7 to be overhigh;

the two vertical parts of the U-shaped pipe 7 are communicated through a transversely distributed air through pipe 71, a secondary slag discharging pipe 72 is fixedly connected to the center of the arc-shaped bottom of the U-shaped pipe 7, and one side of the secondary slag discharging pipe 72 is communicated with a self-draining pipe 73;

after gas enters the U-shaped pipe 7, liquid can be influenced by gravity and accumulated inside the circular arc of the U-shaped pipe 7, the gas at the moment can directly enter the other end of the U-shaped pipe 7 through the gas through pipe 71, the gas is extracted through the low negative pressure extraction branch pipe 6, the self-drainage pipe 73 is connected with the automatic waterproof device at the moment, the automatic water drainage device at the moment can control and prevent water according to the liquid level inside the secondary slag drainage pipe 72, the liquid level inside the secondary slag drainage pipe 72 is always higher than the self-drainage pipe 73, the self-drainage pipe 73 is always in an air seal state, closed circulating drainage is formed, the method is also applied to long-period continuous gas extraction, meanwhile, gas leakage is avoided, and continuous work of the device can be achieved.

The use process of the invention

For the sake of brevity, some noun expressions are introduced

A valve at the joint of the end part of the U-shaped pipe 7 and the low-negative-pressure extraction branch pipe 6 is a butterfly valve A, a valve at a suction port at the top of the gas separation bin 2 is a butterfly valve B, and a valve at the end part of the gas inlet branch pipe 31 is a butterfly valve C;

inserting the extraction pipe 1 into the drill hole to continuously extract gas, wherein the extracted gas enters the disc type separation bin 3 through the extraction hose 11 and the gas inlet branch pipe 31, and the coal powder enters the disc type separation bin 3 through the slag discharge hose 12 and the slag inlet branch pipe 32;

when the drilling construction rock section adopts static pressure water drilling, the butterfly valve A is fully opened, the butterfly valve B is properly opened, the butterfly valve C is fully opened, and extraction adjustment is carried out;

when the explosion-proof motor is started, the central shaft 41 rotates slowly, the sprayed gas carries a small amount of coal dust to be filtered through the self-shaking-off filter screen 4 above, the filtered gas is sucked and ascended to the inside of the gas separation bin 2, at the moment, a large amount of coal slag sprayed by the slag inlet branch pipe 32 only contains a small amount of residual gas, the coal slag descends along with the rotation of the self-shaking-off filter screen 4 to push the coal slag to move downwards, meanwhile, the gas is sucked and ascended to the inside of the gas separation bin 2 through the plurality of filter screens, when the self-shaking-off filter screen 4 rotates to the position below one side close to the slag inlet branch pipe 32, the coal slag is driven to act as a convex block 33, at the moment, the unidirectional elastic hinge mechanism 42 at the central shaft 41 rotates at a certain angle when the self-shaking-off filter screen 4 is blocked by the slag inlet branch pipe 32, the unidirectional elastic hinge mechanism 42 rotates to store energy, the convex block 33 is in a circular arc shape, at the moment, after the self-shaking-off filter screen 4 rotates to incline and is separated from the convex block 33, the convex block 4 breaks away from the filter screen 4 to contact with the convex block 33, and the surface of the elastic hinge mechanism, and the filter screen 31 is reset once, and impurities generated by the elastic spring, so that the elastic hinge mechanism can be directly reset on the filter screen 4 and the filter screen 4 and the filter screen can be reset;

when the coal bed is drilled to 0.5-1.0 meter of the outburst coal bed, the drilling is stopped, the spray head 51 and the water gun 52 are opened, so that liquid in the liquid supply pipeline 5 enters the gas separation bin 2, the interior of the primary slag discharge pipe 35 is sealed, the butterfly valve B is gradually and completely opened to adjust water column pressure and negative pressure, the liquid level in the primary slag discharge pipe 35 is higher than the liquid level in the bent discharge pipe 351, the liquid is ejected out of the top cover at the end part of the bent discharge pipe 351, impurities are communicated with a water source and are discharged to the outside, and gas at the moment is influenced by the sealing of the liquid when coal dust impurities are discharged, so that the gas cannot enter the interior of the bent discharge pipe 351, so that the gas cannot be discharged, the coal dust impurities are continuously discharged, the blockage situation of the disc type separation bin 3 is avoided, the long-period extraction and discharge is carried out, and the leakage is avoided;

if too much slag is accumulated in the primary slag discharge pipe 35, a discharge valve at the bottom of the primary slag discharge pipe 35 can be opened and closed back and forth to discharge slag orderly, but a water gun 52 needs to be opened to ensure that the primary slag discharge pipe 35 is blocked, in this state, the phenomenon that accumulated slag is generated in the disc type separation bin 3 to influence the normal rotation operation of the disc type separation bin 3 is mainly shown, and the disc type separation bin corresponds to some special terrain areas, for example, an extension collector 34 is fixed at the outer side of the disc type separation bin 3, coal powder pushed by a self-shaking-off filter screen 4 is firstly pushed to the primary slag discharge pipe 35, meanwhile, the residual coal powder and the shaken-off coal powder fall into the extension collector 34 and enter the primary slag discharge pipe 35 through a slag discharge communicating pipe 341 under the influence of gravity, the extension collector 34 increases the volume, or an extension bin is directly arranged between the primary slag discharge pipe 35 and the disc type separation bin 3, so that the accumulated volume is increased;

the gas filtered by the disc type separation bin 3 enters the U-shaped pipe 7, at the moment, the liquid inside the gas separation bin 2 is influenced by the extraction of the low-negative-pressure extraction branch pipe 6, the liquid is influenced by gravity and enters the bent part of the U-shaped pipe 7 to be accumulated, the gas enters the low-negative-pressure extraction branch pipe 6 through the gas through pipe 71 to be discharged, at the moment, the water level control continuous drainage is carried out through the self-drainage pipe 73 on the side surface of the secondary slag discharge pipe 72, and therefore the gas cannot be leaked.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (5)

1. An internal and external extraction blowout preventer for an AHB type mine gas treatment borehole construction hole is characterized in that: the self-sealing gas-water-slag separation and collection device comprises a blowout preventer (100) for drainage in a hole, a self-sealing gas-water-slag separation and collection device (200) and a U-shaped drainage water preventer (300), wherein the blowout preventer (100) for drainage in the hole, the self-sealing gas-water-slag separation and collection device (200) and the U-shaped drainage water preventer (300) are communicated in sequence;

   the in-hole extraction blowout preventer (100) comprises an extraction pipe (1) arranged at a drill hole, and an extraction hose (11) and a slag discharge hose (12) are fixedly connected to the side surface of the extraction pipe (1);

   the self-sealing gas-water-slag separation, collection and extraction device (200) comprises a gas separation bin (2) and a disc type separation bin (3) which are vertically distributed, the side surface of the disc type separation bin (3) is fixedly connected with a gas inlet branch pipe (31) and a slag inlet branch pipe (32), the gas inlet branch pipe (31) is communicated with the extraction hose (11), the slag inlet branch pipe (32) is communicated with the slag discharge hose (12), and the gas separation bin (2) is communicated with the disc type separation bin (3);

   six self-shaking-off filter screens (4) rotating by taking the circle centers of the disc type separation bins (3) as rotation centers are arranged in the disc type separation bins (3), and a plurality of protruding blocks (33) distributed at angles are fixedly connected to the bottoms of the inner walls of the disc type separation bins (3) and used for enabling the self-shaking-off filter screens (4) to generate instant contact shaking-off particles with the protruding blocks (33) when rotating;

   the U-shaped drainage water-proof device (300) comprises a low negative pressure drainage branch pipe (6) and a U-shaped pipe (7), one end of the U-shaped pipe (7) is communicated with the low negative pressure drainage branch pipe (6), and the other end of the U-shaped pipe (7) extends to the top of the gas separation bin (2) and is communicated with the gas separation bin (2).
2. 2. The inside and outside extraction blowout preventer of the AHB type mine gas treatment borehole construction hole of claim 1, wherein: the gas inlet branch pipe (31) and the slag inlet branch pipe (32) are vertically distributed on one side, close to the extraction pipe (1), of the disc type separation bin (3), the center of the circle of the disc type separation bin (3) is rotatably connected with a central shaft (41), six self-shaking-off filter screens (4) are annularly distributed on the peripheral side of the central shaft (41), the self-shaking-off filter screens (4) are rotatably connected with the central shaft (41) through one-way elastic hinge mechanisms (42), and the gas inlet branch pipe (31) and the slag inlet branch pipe (32) are respectively located above and below the central shaft (41).
3. 3. The inside and outside extraction blowout preventer of the AHB type mine gas treatment borehole construction hole of claim 2, wherein: the improved slag separator is characterized in that a primary slag discharge pipe (35) is fixedly connected to the position under the disc type separation bin (3), one side of the primary slag discharge pipe (35) is connected with a bent discharge pipe (351), the top of the bent discharge pipe (351) is hinged to a sealing cover, the disc type separation bin (3) is far away from an extension collector (34) fixedly connected to the position under one side of the air inlet branch pipe (31), the extension collector (34) is communicated with the disc type separation bin (3), the protruding block (33) covers the extension collector (34), and the lowest end of the extension collector (34) is communicated with the primary slag discharge pipe (35) through a slag discharge communicating pipe (341).
4. 4. The inside and outside extraction blowout preventer of AHB type mine gas treatment borehole construction hole of claim 3, wherein: the inside of gas separation storehouse (2) is provided with oblique screen cloth (22) that two slopes set up, the inner wall top fixedly connected with breakwater (21) in gas separation storehouse (2), gas separation storehouse (2) bottom through shrink-fit (23) with opening intercommunication directly over disk separation storehouse (3), from sealing up gas water sediment separation collection extractor (200) still includes liquid supply pipeline (5), liquid supply pipeline (5) communicate respectively has shower nozzle (51), squirt (52), shower nozzle (51) are located directly over gas separation storehouse (2), squirt (52) are located one side of once deslagging pipe (35).
5. 5. The inside and outside extraction blowout preventer of AHB type mine gas treatment borehole construction hole of claim 1, characterized in that: two vertical portions of U-shaped pipe (7) communicate through transversely distributed's air pipe (71), arc bottom center department fixedly connected with secondary scum pipe (72) of U-shaped pipe (7), one side intercommunication of secondary scum pipe (72) has from drain pipe (73).

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