CN202023530U

CN202023530U - Step-by-step expansion fast hole packer for coal mine gas extraction

Info

Publication number: CN202023530U
Application number: CN2011200943816U
Authority: CN
Inventors: 李晓华; 戚新红; 李青松; 杨正东; 李绍泉; 龙祖根; 韩真理; 向龙; 罗勇; 秦震东; 马曙
Original assignee: GUIZHOU MINE SAFETY SCIENTIFIC RESEARCH INSTITUTE
Current assignee: GUIZHOU MINE SAFETY SCIENTIFIC RESEARCH INSTITUTE
Priority date: 2011-04-01
Filing date: 2011-04-01
Publication date: 2011-11-02
Anticipated expiration: 2021-04-01

Abstract

The utility model relates to a hole sealing device of a coal mine gas extraction hole, which comprises an extraction pipe, a primary expansion bag, a secondary expansion bag, a tertiary expansion bag, an isolation device, an expansion-resisting pad, an expansion material, a cutting sleeve and the like, wherein the extraction pipe is mainly used for extracting gas; the different grades of expansion bags are mainly expanded at different times; the isolation device is mainly used for temporarily dividing the expansion bag into two different spaces, and different expansion substances are filled in the different spaces; the expansion-resisting cushion is mainly used for preventing the expansion of the expansion substance to two ends; the expansion substance is mainly used for sealing holes of the hole sealing section after self expansion; the cutting ferrule is mainly used for blocking the expansion-blocking pad from moving. The utility model has the advantages that: the carrying is convenient and the operation is simple; the multi-stage expansion sealing can be quickly and conveniently realized for the extraction drill hole, the hole sealing depth is long, the sealing effect of the drill hole is good, and the hole sealing quality guarantee is provided for the extraction of coal seam gas in the coal mine.

Description

The coal mine gas extraction rapid hole sealing device that expands step by step

[technical field]

The utility model relates to the Safety of Coal Mine Production technical field, specifically, is a kind of coal mine gas extraction rapid hole sealing device that expands step by step.

[background technology]

The coal mine gas accident is one of great disaster in colliery, and coal-bed gas is taken out the measure that effects a permanent cure of the effectively preventing gas accident that is current line in advance, yet the good sealing quality of the extraction borehole that construction puts in place is again the prerequisite that the guarantee gas pumping is obtained good result.

At present, hole sealing technology to mash gas pumping drilling has carried out a lot of research, generally be to loose or polyurethane etc. carries out sealing of hole for sealing material with cement mortar sealing of hole, horse are beautiful, when adopting the hole-sealing technology of above sealing material, often occur leaking gas or bigger workload behind the extraction borehole sealing of hole.Simultaneously, when adopting expanding material sealing of hole such as horse beautifully looses, polyurethane, often adopt cloth-like thing circumvolution dilatant sealing of hole, hole-sealing technology complexity, sealed borehole length are shorter, cause extraction borehole gas leakage serious; And the dilatant that has has toxicity, and workman's health is caused serious harm.

[utility model content]

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of coal mine gas extraction rapid hole sealing device that expands step by step is provided.

The purpose of this utility model is achieved through the following technical solutions:

A kind of coal mine gas extraction rapid hole sealing device that expands step by step, it comprises extraction pipe, one-level expanding bag, compound expansion bag, three grades of expanding bags and spacer assembly; The inwall of expanding bag and extraction pipe stick together, and the opening of expanding bag seals and is bonded at above the extraction tube wall behind the dilatant of packing into; Spacer assembly is arranged on the expanding bag;

Spacer assembly surpasses the pipe of semicircle by cross section and can slider bar form in pipe, mainly is that expanding bag is isolated into different spaces, and keeps the different dilatants in two spaces not mix;

Resistance expand pad be diameter by the Rubber washer that is slightly larger than boring aperture because it is directly greater than boring, therefore in boring, moves the back and form " bowl " shape, can stop that material after the one-level inflation pocket inflates is to two ends.

One-level expanding bag, compound expansion bag, three grades of interior dilatant compositions of being adorned of expanding bag are according to the proportioning that requires that begins the time of expanding, also can utilize simultaneously beginning the expansion time of the different control expanding bags at different levels of incorporation time, require the dilatant in the one-level expanding bag to begin the dilatant of expansion time early than the compound expansion bag, the expansion time of compound expansion bag is early than three grades of expanding bags, realize expanding step by step with this, allow the interior dilatant of three grades of expanding bags in limited space, expand, thus the effect of the sealing extraction borehole that expands tight step by step.

Compared with prior art, good effect of the present utility model is:

When (1) the utility model has overcome the heavy of present employing cement mortar sealing of hole workload and has adopted the dilatant sealing of hole to defectives such as serious gas leakage behind the harm of health, complicated step, the sealing of hole;

(2) the utility model adopts the method for sealing that expands step by step, has realized the tight sealing of extraction borehole, satisfies the requirement of coal mine gas extraction sealing of hole;

(3) of the present utility model in light weight, easy to carry, its workload is little, simple to operate, the sealing of hole effect is better.

[description of drawings]

Fig. 1 structural representation of the present utility model;

Fig. 2 expanding bag of the present utility model place cross section;

The spacer assembly cross section of Fig. 3 expanding bag of the present utility model.

[specific embodiment]

The specific embodiment that below provides a kind of coal mine gas extraction of the utility model to expand the rapid hole sealing device step by step.

Embodiment 1

See also accompanying

drawing

1,2,3, a kind of coal mine gas extraction rapid hole sealing device that expands step by step, it is characterized in that, form by expand pad 6, dilatant 9,10 and cutting ferrule 5 etc. of extraction pipe 1, one-level expanding bag 2, compound expansion bag 3, three grades of expanding bags 4, spacer assembly 8, resistances, be used for the coal bed gas drainage borehole sealing.

The inwall of one-level expanding bag 2, compound expansion bag 3, three grades of expanding bags 4 and the outer wall of extraction pipe 1 stick together (except spacer assembly 8 places), the different material of packing into and be used to expand in two spaces that expanding bag separated with spacer assembly 8 (as: beautiful diffusing resin of horse and catalyzer, polyurethane combination AB liquid etc.) 9 and 10 should seal and be bonded on extraction pipe 1 wall at the opening of expanding bag behind the dilatant of packing into; One-level, secondary, three grades of expanding bags are to expand step by step, the expansion time that is one-level expanding bag 2 is early than compound expansion bag 3, the 3 expansion times of compound expansion bag are early than three grades of expanding bags 4, simultaneously, the length of expanding bag is the sealed borehole length design according to the scene, and the spacing of expanding bag is according to the expansion ratio design of extraction borehole diameter and dilatant.

Extraction pipe 1 inner end is reserved with extraction is approximately 1cm with diameter aperture 7; The two ends of extraction pipe 1 are cutting ferrule 5 fixedly, and cutting ferrule 5 is fixed on the extraction pipe.

Spacer assembly 8 by cross section surpass the pipe 11 of semicircle and therein slider bar 12 form, mainly be that expanding bag is isolated into two different spaces, and keep the different dilatants in two spaces not mix.

Resistance expand pad 6 be diameter by the Rubber washer that is slightly larger than boring aperture, be used to stop after the one-level inflation pocket inflates that the direction to 5 flows respectively.

During the utility model work:

(1) after extraction borehole construction finishes, the coal mine gas extraction hole packer that expands is step by step conscientiously checked, confirm the integrality of hole packer assembly;

(2) confirm that hole packer is complete after, open the spacer assembly of one-level expanding bag, compound expansion bag, three grades of expanding bags successively, and the difference in the sealing of hole bags at different levels expanded fully mix by the opening material, because the proportioning of the dilatant in the expanding bags at different levels is different successively different with the beginning incorporation time, making the time-series that begins to expand is one-level expanding bag, compound expansion bag, three grades of expanding bags;

(3) before inflation pocket inflates, sealer is sent into the suitable position of extraction borehole, and the space between swollen pad of resistance and one-level expanding bag swathes some cotton yarns respectively, the dilatant outflow after control is expanded;

(4) because the dilatant proportioning in the expanding bags at different levels is different with incorporation time, the one-level expanding bag of hole packer can expand and break prior to the compound expansion bag in the boring, the compound expansion bag can and break prior to three grades of inflation pocket inflates, before three grades of expanding bags break, the firsts and seconds expanding bag has broken and has been full of the space at place, such three grades of expanding bags will well improve the sealing of hole effect after fully expanding under the limited space.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model design; can also make some improvements and modifications, these improvements and modifications also should be considered as in the protection domain of the present utility model.

Claims

1. coal mine gas extraction rapid hole sealing device that expands step by step is characterized in that it comprises extraction pipe, expanding bag and spacer assembly; The inwall of expanding bag and extraction pipe stick together, and the opening of expanding bag seals and is bonded at above the extraction tube wall behind the dilatant of packing into; Spacer assembly is arranged on the expanding bag.

2. a kind of coal mine gas extraction as claimed in claim 1 rapid hole sealing device that expands step by step is characterized in that, spacer assembly surpass the pipe of semicircle by cross section and in pipe slider bar form.