CN201826807U - Gas drainage hole sealing device - Google Patents

Abstract

The utility model discloses a gas drainage hole sealing device comprising a gas drainage pipe, two rubber baffle groups, a curing material delivery pipe and a sealing liquid delivery pipe, wherein a gas collection hole is arranged at one end part of the gas drainage pipe; the two rubber baffle groups are sheathed at two ends of the gas drainage pipe respectively; each rubber baffle group is provided with two rubber baffles which are axially and dividually arranged; the gas collection hole is positioned at the outer end of the rubber baffle group; the curing material delivery pipe is arranged outside the gas drainage pipe; one end of the curing material delivery pipe is a curing material inlet; the curing material delivery pipe is provided with two curing material outlets which are respectively positioned between the two rubber baffles of each rubber baffle group; the sealing liquid delivery pipe is arranged outside the gas drainage pipe; one end of the sealing liquid delivery pipe is a sealing liquid inlet, and the other end of the liquid delivery pipe is a sealing liquid outlet; and the sealing liquid outlet is positioned between the two rubber baffle groups. The gas drainage hole sealing device can realize good plugging effect.

Description

The gas pumping hole sealing device

Technical field

The utility model relates to a kind of gas pumping hole sealing device, and it can be used for gas pressure and measures the extraction of gases such as natural gas.

Background technology

Gas drainage under suction is current reduction coal-face gas density, implement one of effective measures of regional protrusion-dispelling, and the gas drainage under suction effect depends on method for sealing and sealing quality to a great extent.

The gas hole sealing device that generally adopt in present colliery mainly contains polyurethane sealing aperture apparatus and cement mortar hole sealing device.

In highly gassy mine and coal and gas outburst mine, geostatic stress strengthens along with adopting dark continuous increase, down-hole coal bed boring under the geostatic stress effect with creep gradually.Sealing of hole time that draws out methane is generally all long, and 2～3 months at least, half a year at most.And for the polyurethane sealing aperture apparatus, (the single shaft anti-pressure ability is 0.9～1.2Mpa) because the polyurethane material anti-pressure ability is low, gradually reduced as time passes, its mechanical property can't stop the creep of boring and the formation of leakage path, seal insecure, cause later stage gas drainage under suction concentration sharply to reduce, the sealing of hole failure.

For the cement mortar hole sealing device, its cement mortar uniaxial compressive strength is higher, can reach 30Mpa, and has early epistasis and certain fluidity.But what the cement mortar sealing of hole adopted is Portland cement, owing to early stage chemical shrinkage, self-constriction and later stage of cement owing to volume contractions that reason caused such as variations in temperature, environmental dryings, the danger of cement shrinkage cracking is strengthened in the capital to a certain extent, thereby causes the shutoff failure.

The utility model content

The purpose of this utility model is, a kind of gas pumping hole sealing device is provided, and its plugging effect is good, but and the extraction concentration and the availability of gas.

Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:

A kind of gas pumping hole sealing device, it comprises: the gas pumping pipeline, the one end is provided with the gas gas collection hole; Two rubber baffle groups are set in the two ends of gas pumping pipeline respectively, and each rubber baffle group has two and axially divides the rubber baffles that are arranged, and the gas gas collection hole is positioned at the outer end of rubber baffle group; The curing materials conveyance conduit, it is arranged on the outside of gas pumping pipeline, one end of curing materials conveyance conduit is the curing materials inlet, has two curing materials outlets on the curing materials conveyance conduit, lays respectively between two rubber baffles of each rubber baffle group; The sealing fluid conveyance conduit, it is arranged on the outside of gas pumping pipeline, and an end of sealing fluid conveyance conduit is the sealingfluid inlet, and the other end is a seal fluid outlet, and seal fluid outlet is between two rubber baffle groups.

In preferred embodiment, the position of the outside corresponding gas gas collection hole of described gas pumping pipeline is provided with the covering cap.

In preferred embodiment, described curing materials conveyance conduit and sealing fluid conveyance conduit are separately positioned on the both sides of gas pumping pipeline, and three pipelines be arranged in parallel respectively.

In preferred embodiment, described rubber baffle is circular, and it is set in outside the described gas pumping pipeline ordinatedly.

In preferred embodiment, in described two curing materials outlet, one of them is the port with respect to the curing materials inlet of described curing materials conveyance conduit, and another is the opening on the curing materials conveyance conduit.

The characteristics and the advantage of hole sealing device of the present utility model are:

1, its principle is to utilize seal fluid that certain fluidity and certain surface tension are arranged, under surface tension effects, penetrate in the hole wall original crack on every side in extraction hole, form one fluid film in the crack, this road fluid film is shutoff gas effectively; Solid material adopts special cement or other fast dry substance, has characteristics such as super early strong, microdilatancy, compensate for shrinkage, thereby reduces the danger of solid shrinkage cracking, effectively shutoff liquid.

2, it can prevent that extraction hole air outside from entering in the extraction pore chamber, the gas that can prevent simultaneously inside, extraction hole again crack around the hole wall in extraction hole is leaked to the outside, thereby realize good plugging effect, can improve the extraction concentration and the availability of gas.

Description of drawings

In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of gas pumping hole sealing device of the present utility model.

The specific embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

Referring to shown in Figure 1, the gas pumping hole sealing device that the utility model embodiment proposes, it comprises 1, two rubber baffle group 2 of gas pumping pipeline, curing materials conveyance conduit 3, sealing fluid conveyance conduit 4.One end of gas pumping pipeline 1 is provided with gasgas collection hole 11; Two rubber baffle groups 2 are set in the two ends of gas pumping pipeline 1 respectively, and each rubber baffle group 2 has two and axially divides therubber baffle 21,22 that is arranged, and the gas gas collection hole is positioned at the outer end of rubber baffle group; Curing materials conveyance conduit 3 is arranged on the outside of gas pumping pipeline 1, one end of curing materials conveyance conduit 3 is acuring materials inlet 31, have twocuring materials outlets 32,33 on the curing materials conveyance conduit, lay respectively between tworubber baffles 21,22 of each rubber baffle group 2; Sealing fluid conveyance conduit 4 is arranged on the outside of gas pumping pipeline 1, and an end of sealing fluid conveyance conduit 4 is sealingfluidinlet 41, and the other end is a seal fluid outlet 42, and seal fluid outlet 42 is between two rubber baffle groups 2.

Wherein, in twocuring materials outlets 32,33, one of them is the port with respect to curing materials inlet 31 of curing materials conveyance conduit 3, and another is the opening on the curing materials conveyance conduit 3.

After the gas pumping hole is accomplished fluently, above-mentioned hole sealing device of the present utility model is put into the extraction hole.Eachrubber baffle 21,22 of rubber baffle group 2 is a flexible material, and the elasticity extruding that rubs of rubber baffle itself and extraction hole makes hole sealing device fixing in the extraction hole.Then, instrument by grouting pump and so on injects the curable materials of cement mortar (or fast dry substance) and so in the curing materials conveyance conduits 3 fromcuring materials inlet 31, and from twocuring materials outlets 32,33 flow out, because first curing materials outlet 32 is positioned at tworubber baffles 21 of first rubber baffle group 2, between 22, secondcuring materials outlet 33 is positioned at tworubber baffles 21 of second rubber baffle group 2, between 22, thereby tworubber baffles 21 two rubber baffle groups 2, all be full of curable materials between 22, form the curing materials closed chamber.After treating that this curable materials solidifies or solidifies, sealing fluid (swell soil mucus) pumps in the sealing fluid conveyance conduit 4 fromsealingfluid inlet 41, and from seal fluid outlet 42 outflows, between two rubber baffle groups 2, be full of sealing fluid, form the sealing fluid space, because sealing fluid itself has certain caking property, under surface tension effects, penetrate in the extraction hole hole wall original crack on every side, in the crack, form one fluid film, this road fluid film is shutoff gas effectively, simultaneously the curing materials in the curing materials closed chamber is played certain maintenance action, prevent the curing materials shrinkage cracking.Then gas pumping pipeline 1 is connected with the gas pumping major trunk roads again, makes gas from gasgas collection hole 11, enter gas pumping pipeline 1, and go out via the extraction of gas pumping major trunk roads.

Wherein, the curing materials in the curing materials closed chamber can improve the bonding strength in hole sealing device and extraction hole after solidifying, and spins off from the extraction hole to avoid hole sealing device.

The utility model embodiment adopts curing materials liquid for plugging formed material, the hole sealing device of liquefied material shutoff methane gas, can prevent that extraction hole air outside from entering in the extraction pore chamber, the gas that can prevent simultaneously inside, extraction hole again crack around the hole wall in extraction hole is leaked to the outside, thereby realize best plugging effect, can improve the extraction concentration and the availability of gas.

This hole sealing device simple in structure, easy to operate, cost is low, good sealing effect, labour intensity is little, can improve the vacuum in the extraction hole effectively, improves gas drainage under suction concentration, shortens the extraction time.

As an embodiment of the present utility model, the position of gas pumping pipeline 1 outside corresponding gasgas collection hole 11 is provided with and hides cap 5.Hidecap 5 and can prevent that suction coal dust particle blocks gasgas collection hole 11 in the gas drainage under suction process, to avoid influencing gas drainage under suction.

Curing materials conveyance conduit 3 and sealing fluid conveyance conduit 4 are separately positioned on the both sides of gas pumping pipeline 1, and three pipelines be arranged in parallel respectively.When assembling, can onrubber baffle 21,22, corresponding circular hole be set position, corresponding gas pumping pipeline 1 both sides, so that curing materials conveyance conduit 3 and sealing fluid conveyance conduit 4 pass from corresponding circular hole, wherein, the installation site of curing materials conveyance conduit 3 and sealing fluid conveyance conduit 4 can be positioned as close to gas pumping pipeline 1.

Rubber baffle 21,22 is circular, and it is set in outside the gas pumping pipeline 1 ordinatedly, so that the sealing in curing materials in the curing materials closed chamber and the sealing fluid space is isolated mutually.

The above only is several embodiment of the present utility model, and those skilled in the art can carry out various changes or modification to the utility model embodiment and do not break away from spirit and scope of the present utility model according to application documents are disclosed.

Claims (5)

1. a gas pumping hole sealing device is characterized in that, described hole sealing device comprises:

The gas pumping pipeline, the one end is provided with the gas gas collection hole;

Two rubber baffle groups are set in the two ends of gas pumping pipeline respectively, and each rubber baffle group has two and axially divides the rubber baffles that are arranged, and the gas gas collection hole is positioned at the outer end of rubber baffle group;

The curing materials conveyance conduit, it is arranged on the outside of gas pumping pipeline, one end of curing materials conveyance conduit is the curing materials inlet, has two curing materials outlets on the curing materials conveyance conduit, lays respectively between two rubber baffles of each rubber baffle group;

The sealing fluid conveyance conduit, it is arranged on the outside of gas pumping pipeline, and an end of sealing fluid conveyance conduit is the sealingfluid inlet, and the other end is a seal fluid outlet, and seal fluid outlet is between two rubber baffle groups.

2. gas pumping hole sealing device according to claim 1 is characterized in that, the position of the outside corresponding gas gas collection hole of described gas pumping pipeline is provided with the covering cap.

3. gas pumping hole sealing device according to claim 1 is characterized in that, described curing materials conveyance conduit and sealing fluid conveyance conduit are separately positioned on the both sides of gas pumping pipeline, and three pipelines be arranged in parallel respectively.

4. gas pumping hole sealing device according to claim 1 is characterized in that described rubber baffle is circular, and it is set in outside the described gas pumping pipeline ordinatedly.

5. gas pumping hole sealing device according to claim 1, it is characterized in that, in described two curing materials outlet, one of them is the port with respect to the curing materials inlet of described curing materials conveyance conduit, and another is the opening on the curing materials conveyance conduit.

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