CN210622847U

CN210622847U - Air compression sealing device for coal mine gas extraction drill hole

Info

Publication number: CN210622847U
Application number: CN201921199874.9U
Authority: CN
Inventors: 刘莎莎
Original assignee: Shaoxing Huahuo Intelligent Equipment Co ltd
Current assignee: Shanxi Huayang Kehui Testing Technology Co.,Ltd.
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-05-26
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a colliery gas drainage drilling compressed air sealing device relates to coal gas and administers the field, including the exhaust tube, the outer wall of exhaust tube is provided with the injection bag, and the below that the outer wall of exhaust tube is located the injection bag is provided with the locking head, the below that the outer wall of exhaust tube is located the locking head is provided with the filter screen ring, and the top that one side of exhaust tube is located the injection bag is provided with the injection syringe that runs through to the injection bag bottom, one side that the outer wall of exhaust tube is located the injection syringe is provided with the coupling. The utility model discloses a sealed cowling that sets up, gas sensor, warning light detect exhaust tube and collecting duct handing-over department through the sealed cowling whether have gas leakage, and the gas in the sealed cowling feeds back to the warning light after gas sensor detects, has effectively solved current exhaust tube and has collected the pipe connection and not closely probably lead to gas leakage, the problem that the staff is difficult for discovering.

Description

Air compression sealing device for coal mine gas extraction drill hole

Technical Field

The utility model relates to a field is administered to coal gas, specifically is a colliery gas drainage drilling compressed air sealing device.

Background

The gas extraction is a fundamental measure and a main approach for coal mine gas control, and the extraction borehole sealing has great influence on the extraction effect, mainly manifested as serious gas leakage phenomenon and low gas extraction concentration in the process of borehole extraction. The method directly causes that a lot of gas extracted from coal mines cannot reach the available concentration condition, the gas utilization rate is low, a large amount of gas is directly discharged into the atmosphere, not only is huge waste of resources caused, but also pollution is caused to the environment, and the most common hole sealing method at present is to seal two sides of an extracted sealing section in a drill hole by a special matching device or polyurethane, and then inject cement slurry into the middle to realize hole sealing (commonly called two-plugging one-injection).

However, the plugging mode has the defects that the strength of the plugging material is not enough, and the main performance is that the injection sac is stressed in the radial direction, so that a gap is generated between the injection sac and the inner wall of a drill hole, gas leakage is caused, the existing exhaust pipe is not provided with a filtering device, impurities and gas are sucked into the exhaust pipe at the same time, the machine is easy to block, the existing exhaust pipe and a collecting pipeline are generally detachably connected, the gas leakage can be caused due to the fact that the connection mode is not tight, workers cannot easily perceive the gas leakage, and air pollution is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that the radial stress of an injection bag causes a gap between the injection bag and the inner wall of a drill hole and causes gas leakage, a filter device is not arranged on the existing exhaust pipe, impurities and gas are sucked into the exhaust pipe at the same time, the machine is easy to block, the existing exhaust pipe and a collecting pipeline are generally detachably connected, the connection mode is not tight, gas leakage can be caused, and workers cannot easily perceive the problem, and the coal mine gas extraction drill hole compressed air sealing device is provided.

In order to achieve the above object, the utility model provides a following technical scheme: a coal mine gas extraction drilling compressed air sealing device comprises an exhaust pipe, wherein an injection bag is arranged on the outer wall of the exhaust pipe, a locking head is arranged on the outer wall of the exhaust pipe below the injection bag, a filter screen ring is arranged on the outer wall of the exhaust pipe below the locking head, an injection pipe penetrating to the bottom end of the injection bag is arranged on one side of the exhaust pipe above the injection bag, a coupling is arranged on one side of the outer wall of the exhaust pipe above the injection pipe, a sealing cover is arranged on the outer wall of the exhaust pipe above the coupling, a collecting pipeline is arranged at the top end of the exhaust pipe, a pressure valve is arranged on the outer wall of the injection pipe, a filter screen is arranged at the bottom end of the filter screen ring, rotating shafts are arranged on two sides of the locking head, a supporting plate is sleeved on the outer wall of the rotating shafts, a clamping block penetrating to the outer side of the supporting plate is arranged on the outer wall of the rotating shafts, and one side of the supporting plate is provided with a clamping plate, the inner side of the sealing cover is provided with a gas sensor, and one side, located at the collecting pipeline, of the top end of the sealing cover is provided with an alarm lamp.

Preferably, the inner wall of the filter screen ring is provided with threads, and the filter screen ring is detachably connected with the exhaust tube through the threads.

Preferably, the pivot has six, each the welding of the both ends of pivot has the locking head, per two the locking head is through a bolt detachable connection.

Preferably, the support plate and the extension plate are detachably connected through a second bolt, and the outer wall of the extension plate is matched with the inner wall of the support plate.

Preferably, the top end of the filter screen is welded at the bottom end of the filter screen ring, and the sealing cover is connected with the air exhaust pipe through viscous glue.

Preferably, the number of the injection bag is two, the injection bag is made of a nylon woven layer, an anti-seepage coating is arranged on the inner wall of the injection bag, a modified asphalt coating is arranged on the outer wall of the injection bag, and a rubber pad is arranged at the joint of the fixture block and the exhaust pipe.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a backup pad that sets up, the locking head, the extension board, the pivot, No. two bolts, the cardboard, slip casting in the injection bag, the outer wall oppresses the backup pad and opens after the injection bag expands, when the injection bag closely laminated with the drilling inner wall, the backup pad was opened completely, cardboard support backup pad made it keep the horizontality, effectively solved plugging material intensity inadequately, mainly showed in injection bag radial atress, make and produce the gap between injection bag and the drilling inner wall, lead to the problem of gas leakage, through the filter screen ring that sets up, the filter screen, gas and debris pass through the filter screen separation, gas after the filtration is taken out through the exhaust tube, debris are kept apart by the filter screen and are moved to the filter screen both sides along the outer wall and break away from, effectively solved current exhaust tube and not equipped with filter equipment, lead to debris and gas to inhale in the exhaust tube simultaneously, easily cause the problem of machine jam, through, gas sensor, warning light, whether there is gas leakage through sealed cowling detection exhaust tube and collection pipeline handing-over department, and the warning light is given back to in the sealed cowling gaseous through gas sensor detection, has effectively solved current exhaust tube and collection pipeline and generally for dismantling the connection, and this kind of connected mode is connected and is inseparable probably leads to gas leakage, the problem that the staff is difficult to perceive.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the seal housing of the present invention;

FIG. 3 is a schematic view of the structure of the rotating shaft of the present invention;

FIG. 4 is a schematic view of the partition structure of the present invention

Fig. 5 is the schematic diagram of the filter screen structure of the present invention.

In the figure: 1. an air exhaust pipe; 2. an injection balloon; 3. an injection tube; 4. a coupling; 5. a pressure valve; 6. a support plate; 7. a locking head; 8. a screen ring; 9. filtering with a screen; 10. a sealing cover; 11. a collection pipe; 12. a gas sensor; 13. an alarm light; 14. an extension plate; 15. a rotating shaft; 16. a first bolt; 17. a second bolt; 18. clamping a plate; 19. and (7) clamping blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The gas sensor (model: MJC4/2.5J) mentioned in the utility model can be obtained by market or private ordering.

Referring to fig. 1-5, a coal mine gas extraction drilling compressed air sealing device comprises an extraction tube 1, wherein an injection bag 2 is arranged on the outer wall of the extraction tube 1, a locking head 7 is arranged on the outer wall of the extraction tube 1 and positioned below the injection bag 2, a filter screen ring 8 is arranged on the outer wall of the extraction tube 1 and positioned below the locking head 7, an injection tube 3 penetrating to the bottom end of the injection bag 2 is arranged on the top end of the injection bag 2 on one side of the extraction tube 1, a coupling 4 is arranged on the outer wall of the extraction tube 1 and positioned above the coupling 4, a sealing cover 10 is arranged on the outer wall of the extraction tube 1, a collecting pipeline 11 is arranged on the top end of the extraction tube 1, a pressure valve 5 is arranged on the outer wall of the injection tube 3, a filter screen 9 is arranged at the bottom end of the filter screen ring 8, rotating shafts 15 are arranged on two sides of the locking head 7, a support plate 6 is sleeved on the outer wall of the rotating shaft 15, and a clamping block, an extension plate 14 is sleeved on the inner wall of the support plate 6, a clamping plate 18 is arranged on one side of the support plate 6, a gas sensor 12 is arranged on the inner side of the sealing cover 10, and an alarm lamp 13 is arranged on one side, located on the collecting pipeline 11, of the top end of the sealing cover 10.

Please refer to fig. 5, the inner wall of the filter screen ring 8 is provided with a screw thread, and the filter screen ring 8 is detachably connected with the exhaust tube 1 through the screw thread, so as to facilitate replacing and cleaning the filter screen.

Please refer to fig. 3, six rotating shafts 15 are provided, two ends of each rotating shaft 15 are welded with locking heads 7, and each two locking heads 7 are detachably connected through a bolt 16, so that the distance between the rotating shafts 15 can be adjusted when the exhaust pipes 1 with different diameters are used, and different requirements can be met.

Please refer to fig. 3, the supporting plate 6 is detachably connected to the extending plate 14 by a second bolt 17, and the outer wall of the extending plate 14 is engaged with the inner wall of the supporting plate 6, so as to adjust the distance of the supporting plate 6 according to the inner diameter of the drilled hole and bear the radial force of the injection capsule 2.

Please refer to fig. 1, the top end of the filter screen 9 is welded to the bottom end of the filter screen ring 8, and the sealing cover 10 is connected to the exhaust tube 1 by viscous glue, so as to facilitate maintenance and adjustment when the exhaust tube 1 is connected to the collecting pipe 11 for leakage.

Please refer to fig. 1, the number of the injection bags 2 is two, the injection bags 2 are made of nylon braided layers, the inner wall of the injection bag 2 is provided with an anti-seepage coating, and the outer wall of the injection bag 2 is provided with a modified asphalt coating, so as to increase the elasticity and toughness of the injection bag 2, prevent the injection bag 2 from being worn in the operation process, increase the extensibility of the injection bag 2, and provide a rubber pad at the joint between the fixture block 19 and the exhaust tube 1, so as to prevent the exhaust tube 1 from being scratched by the fixture block 19 for a long time, thereby preventing the exhaust tube 1 from gas leakage, and increase the friction force between the exhaust tube 1 and the fixture block 19, so that the connection is tighter.

The working principle is as follows: firstly, loosening a second bolt 17, pulling out an extension plate 14 to a certain length according to the diameter of the inner wall of a drill hole, screwing the second bolt 17, injecting slurry into an injection bag 2 through an injection pipe 3, pressing a support plate 6 to be opened by the outer wall of the expanded injection bag 2, completely opening the support plate 6 when the injection bag 2 is tightly attached to the inner wall of the drill hole, supporting the support plate 6 to be kept in a horizontal state by a clamping plate 18, simultaneously, when the injection bag 2 is completely filled, pressing a pressure valve 5 to be opened, injecting the slurry in the injection pipe 3 into a space between the two injection bags 2, closing the injection pipe 3 after the injection is finished, opening an exhaust pipe 1, pumping out gas through the exhaust pipe 1 after being filtered by a filter screen 9, detecting whether gas leaks at the joint of the exhaust pipe 1 and a collecting pipeline 11 through a gas sensor 12 in a sealing cover 10, and transmitting an electric signal to a PLC controller to control an alarm lamp 13 to give an alarm when the gas sensor 12 detects the, and informing the staff to solve the leakage accident and completing the detection.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a colliery gas drainage drilling compressed air sealing device, includes exhaust tube (1), its characterized in that: the outer wall of the exhaust tube (1) is provided with an injection bag (2), a locking head (7) is arranged on the outer wall of the exhaust tube (1) and is positioned below the injection bag (2), a filter screen ring (8) is arranged on the outer wall of the exhaust tube (1) and is positioned below the locking head (7), an injection tube (3) penetrating to the bottom end of the injection bag (2) is arranged on the top end of the injection bag (2) on one side of the exhaust tube (1), a coupling (4) is arranged on the outer wall of the exhaust tube (1) and is positioned on one side of the injection tube (3), a sealing cover (10) is arranged on the outer wall of the exhaust tube (1) and is positioned above the coupling (4), a collecting pipeline (11) is arranged on the top end of the exhaust tube (1), a pressure valve (5) is arranged on the outer wall of the injection tube (3), a filter screen (9) is arranged on the bottom end of the filter screen ring (8), and rotating shafts (15) are, the outer wall of pivot (15) has cup jointed backup pad (6), and the outer wall of pivot (15) is provided with fixture block (19) that run through to the backup pad (6) outside, the inner wall of backup pad (6) has cup jointed extension board (14), and one side of backup pad (6) is provided with cardboard (18), the inboard of sealed cowling (10) is provided with gas sensor (12), and the top of sealed cowling (10) is located one side of collecting duct (11) and is provided with warning light (13).

2. The coal mine gas extraction drill hole compressed air sealing device according to claim 1, characterized in that: the inner wall of the filter screen ring (8) is provided with threads, and the filter screen ring (8) is detachably connected with the exhaust pipe (1) through the threads.

3. The coal mine gas extraction drill hole compressed air sealing device according to claim 1, characterized in that: the pivot (15) have six, each the both ends welding of pivot (15) has locking head (7), per two locking head (7) can be dismantled through a bolt (16) and connect.

4. The coal mine gas extraction drill hole compressed air sealing device according to claim 1, characterized in that: the supporting plate (6) is detachably connected with the extension plate (14) through a second bolt (17), and the outer wall of the extension plate (14) is matched with the inner wall of the supporting plate (6).

5. The coal mine gas extraction drill hole compressed air sealing device according to claim 1, characterized in that: the top welding of filter screen (9) is in the bottom of filter screen ring (8), sealed cowling (10) are connected with exhaust tube (1) with the gluey glue of crossing.

6. The coal mine gas extraction drill hole compressed air sealing device according to claim 1, characterized in that: the quantity of injection bag (2) is two, just the material of injection bag (2) constitutes for the nylon weaving layer, the inner wall of injection bag (2) is provided with the prevention of seepage coating, and the outer wall of injection bag (2) is provided with the modified asphalt coating, fixture block (19) and exhaust tube (1) junction are provided with the rubber pad.