CN203476278U

CN203476278U - Grouting type hole sealing and automatic water discharging device for underground drilling gas extraction

Info

Publication number: CN203476278U
Application number: CN201320565172.4U
Authority: CN
Inventors: 王玉奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-12
Filing date: 2013-09-12
Publication date: 2014-03-12
Anticipated expiration: 2023-09-12

Abstract

The utility model discloses a grouting type hole sealing and automatic water discharging device for underground drilling gas extraction. The grouting type hole sealing and automatic water discharging device for underground drilling gas extraction is applied to gas extraction, hole sealing and accumulated water discharging of coal mine underground coal extraction operation. According to the grouting type hole sealing and automatic water discharging device for underground drilling gas extraction, hole sealing with pressure and pressure grouting are adopted, the problems that leakproofness is poor after hole sealing is accomplished, and cracks exist around the sealed and drilled hole are solved, and permeability of a sealed hole is reduced. A reverse water discharging valve (2) is arranged on a plugging device, when accumulated hole in the sealed hole reaches a certain amount, the reverse water discharging valve (2) can be opened by the accumulated water, and automatic water discharging can be carried out. Three check valves which are connected with a grouting pipeline (10) are arranged on a gas extraction pipeline (9), and are used for controlling the grouting pipeline (10) to grout a bag (4), a bag (7) and an enclosed space arranged between the two bags. A gas collecting pipe (1) with gas collecting holes is processed at the front end of the gas extraction pipeline (9), and is used for gas extraction. The grouting type hole sealing and automatic water discharging device for underground drilling gas extraction is simple in structure and convenient to operate, the effect that tight sealing is carried out to prevent gas from leaking is achieved, discharging of the accumulated water in the sealed hole is achieved, and the effect of mine gas extraction can be improved.

Description

Down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder

Technical field

The utility model belongs to down-hole coal bed gas pumping technical field, relates generally to down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder.

Background technology

As everyone knows, the accident of mine disaster causing because of gas explosion in coal mining activity under coal mine all happens occasionally every year, having caused very large loss to country, enterprise and family, is therefore one of key content of national security work for the problem of eliminating all hidden dangers existence in down-hole coal excavation operation.Extraction to projecting coal bed gas in coal mining activity, particularly improving soft seam gas extraction concentration and negative pressure of suction problem is a technical barrier being badly in need of solution.Equipment and method that in current down-hole coal bed operation, gas drainage under suction is used, no matter be to adopt polyurethane material sealing of hole, or the yellow mud sealing of hole to coal seam shallow bore hole extraction, all in various degree have that sealing of hole is tight, the easy ponding problem of extraction pipeline and cause negative pressure of suction not enough, badly influence mine gas extraction and should meet the index request in < < coal mine gas drainage temporary provisions > > up to standard.Probably during stope of coal mines or driving, cause gas explosion accident because of gas exceeding limit.So the problem that solves down-hole drilling sealing of hole, gas leakage and draining difficulty is to guarantee to get rid of in coal mining activity process the Important Action of hidden danger.

Utility model content

In view of in prior art to the existing practical problem of coal bed gas extraction, the utility model designs and discloses down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder.The thinking that instructs of design is: 1, adopt sealing of hole slip casing by pressure with pressure, solve sealing and sealing boring crackle gap around after sealing of hole, reduce its permeability, play the effect of tight shutoff.2, the reverse valve that discharges water is set on plugging device, when hole internal water accumulation reach a certain amount of after ponding pressure wash valve automatic draining open, reduce the operation that manually discharges water, improve gas pumping effect.For achieving the above object, the concrete technical scheme that the utility model is taked is: down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder are mainly to consist of pump-line, gas collection hole, reverse Draw off valve, pouch check valve, line check valve door, Grouting Pipe snap joint; Wherein on pump-line, be provided with altogether three flap valve, a pouch that pouch check valve is housed is respectively set on the pump-line at line check valve door two ends, first by Grouting Pipe to slip casting in pouch, when grouting pressure reaches 2.0MPa, open line check valve door, make expansion cement slurry fill with the middle vacant part of two pouches, stop slip casting when grouting pressure reaches 3.0MPa, check valve is closed automatically; The front end of pump-line is processed with gas collection hole, in order to draw out methane; Oppositely Draw off valve is arranged on the pump-line of discharge rear end, must be with pressing wind to dredge grouting pipe through pump-line after slip casting finishes, when hole internal water accumulation reach a certain amount of after, hydraulic pressure is washed reverse Draw off valve open and automatically by grouting pipe, is flowed out, Grouting Pipe snap joint setting is arranged on grouting pipe back-end location, is connected with the grouting pipeline of outside hole-sealing pump.Described down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder, wherein adopting the pump-line external diameter that polyvinyl chloride pipe material is manufactured is 50mm, length 18m.

Down-hole drilling gas pumping slip casting type sealing of hole described in the utility model and automatic bleeder, simple in structure, easy to operate.With pressure grouting, in drawing-off gas, can tightly seal boring crackle gap around, reduce permeability, play the problem that tight shutoff prevents gas leakage.After sealing of hole, hole internal water accumulation can flow out by grouting pipe through Draw off valve after a certain amount of automatically at savings, has solved extraction pipeline ponding problem, has reduced the operation that manually discharges water, and is conducive to improve mine gas extraction effect.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

In figure: 1, discharge; 2, reverse Draw off valve; 3, pouch check valve; 4, pouch; 5, line check valve door; 6, pouch check valve; 7, pouch; 8, Grouting Pipe snap joint; 9, pump-line; 10, grouting pipe.

The specific embodiment

Below in conjunction with accompanying drawing, provide embodiment of the present utility model as follows:

As shown in Figure 1, down-hole drilling gas pumping slip casting type sealing of hole described in the utility model and automatic bleeder are mainly by: discharge 1, oppositely Draw off valve 2, pouch check valve 3, pouch 4, line check valve door 5, pouch check valve 6, pouch 7, Grouting Pipe snap joint 8, pump-line 9, grouting pipe 10 form; Wherein, outside dimension is that 50mm, length dimension are 18m, is provided with three check valve that are connected with grouting pipe 10, in order to slip casting on the pump-line 9 that adopts polychloroethylene pipes to manufacture.The middle part of pump-line 9 is provided with line check valve door 5, on the pump-line 9 at line check valve door 5 two ends, respectively arrange one the pouch 4 of pouch check valve 3 and the pouch 7 of pouch check valve 6 are housed, by slip casting duct to pouch 4 and the interior slip casting of pouch 7, when grouting pressure reaches 2.0MPa, open line check valve door, make expansion cement slurry fill with the middle sealing of two pouches slip casting space, stop slip casting when grouting pressure reaches 3.0MPa, check valve is closed automatically.The front end of pump-line 9 is processed with the discharge 1 with gas collection hole, in order to mash gas extraction gas.Oppositely Draw off valve 2 is fixed on discharge 1 rear end pump-line 9 and is connected on grouting pipe 10.After slip casting finishes, necessary using presses wind through discharges 1 and reverse Draw off valve 2, to dredge grouting pipes by pump-line 9 again through grouting pipe 10 and Grouting Pipe snap joint 8.Oppositely Draw off valve 2 is under the effect of negative pressure of suction, and at ordinary times in closed condition, when hole internal water accumulation reaches a certain amount of, hydraulic pressure is washed reverse Draw off valve 2 open and carried out automatic draining by Grouting Pipe 10 and snap joint 8.Grouting Pipe snap joint 8 connects Grouting Pipe 10 and is fixed on pump-line 9 back-end locations, connects with the grouting pipeline of outside grouting pump.Hole sealing device described in the utility model in use, is first sent into hole sealing device the assigned address of coal bed drilling in order, and slip casting snap joint 8 is connected with the grouting pipeline of grouting pump, starts grouting pump and starts slip casting.When operating pressure reaches 1.0MPa, pouch check valve 3 and pouch check valve 6 are opened, at this moment grouting pipe starts to pouch 4 and the interior slip casting of pouch 7, after pouch 4 and pouch 7 expand, the boring in coal seam is played to two ends plugging action, push up the surrounding of real drill hole wall, between pouch 4 and pouch 7, also form sealing slip casting space simultaneously.When grouting pressure reaches 2.0MPa, line check valve door 5 is opened, beginning is to the sealing slip casting space slip casting between two pouches, the pressure in sealing slip casting space increases gradually, slurries start, to drill hole wall infiltration, when operating pressure reaches 3.0MPa, to stop slip casting, check valve is closed automatically, plays the airtight effect of sealing of hole.In boring, gas, after discharge 1 is collected, is extracted out through draw-off pump station by pump-line 9.

Claims

1. a down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder, it is characterized in that: described a kind of down-hole drilling gas pumping slip casting type sealing of hole and automatic bleeder are mainly to consist of discharge (1), reverse Draw off valve (2), pouch check valve (3), pouch (4), line check valve door (5), pouch check valve (6), pouch (7), Grouting Pipe snap joint (8), pump-line (9), grouting pipe (10); Wherein, pump-line (9) is provided with three check valve that are connected with grouting pipe (10); Line check valve door (5) is fixed on the middle part of pump-line (9), respectively arranges one the pouch (4) of pouch check valve (3) and the pouch (7) of pouch check valve (6) are housed on the pump-line (9) at line check valve door (5) two ends; The front end of pump-line (9) is provided with discharge (1); Reverse Draw off valve (2) is fixed on discharge (1) rear end pump-line (9) and above connects with grouting pipe (10); Grouting Pipe snap joint (8) is fixed on pump-line (9) back-end location and connects with grouting pipe (10).

2. a kind of down-hole drilling gas pumping slip casting type sealing of hole according to claim 1 and automatic bleeder, is characterized in that: the outside dimension of pump-line (9) is 50mm, and length dimension is 18m.

3. a kind of down-hole drilling gas pumping slip casting type sealing of hole according to claim 1 and automatic bleeder, is characterized in that: discharge is processed with gas collection hole on (1).