CN102011606A - Reaction type foam hole sealing multi-baffle sealing device - Google Patents
Reaction type foam hole sealing multi-baffle sealing device Download PDFInfo
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- CN102011606A CN102011606A CN 201010581980 CN201010581980A CN102011606A CN 102011606 A CN102011606 A CN 102011606A CN 201010581980 CN201010581980 CN 201010581980 CN 201010581980 A CN201010581980 A CN 201010581980A CN 102011606 A CN102011606 A CN 102011606A
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Abstract
The invention discloses a reaction type foam hole sealing multi-baffle sealing device, comprising an infusion tube and at least two hole sealing baffles, wherein a seal section is divided into at least two seal subsections by a stock stop plate parallel to the hole sealing baffles along the axial direction, and the stock stop plate is provided with an axial feeding through hole. In the invention, the initial foaming space of a hole sealing material is reduced, thus being beneficial to fully foaming by centralizing heat at the foaming initial stage; in the foaming process, stock enters into the rear seal subsection to be foamed continuously by virtue of the axial feeding through hole on the stock stop plate, seal units are relatively more, and the stock can be subject to restricted foaming in each seal unit, thus excellent sealing quality can be ensured by multiple restricted foaming seal units; and a sealing baffle device is adjustable on a gas drainage pipe, and hole sealing depth can be ensured to be more than the width of a coal bed fracture zone, thus air is difficult to penetrate from coal bed micro fracture, and higher gas drainage concentration, higher gas drainage efficiency and lower gas drainage power consumption are ensured.
Description
Technical field
The present invention relates to a kind of gas in mine extraction ancillary service, relate in particular to a kind of device that is used for the construction of gas pumping anti-leak in the gas pumping hole that is arranged at.
Background technology
Coal bed gas be the colliery in recovery process for preventing gas explosion and outstanding, guarantee Safety of Coal Mine Production and elementary byproduct that pump drainage goes out; Its main component is a methane, and as can be seen, coal bed gas is the energy and the industrial chemicals of outbalance from its component content, simultaneously, has material impact for the safety of Coal Production.Thereby the extraction of coal bed gas far surpasses the economic worth of itself with utilization for the importance of safety of coal mines, energy security and Environmental security.In the practice, stretch into and gas is carried out vacuum inhale and to adopt, need to carry out sealing of hole between extraction tube outer surface and the extraction hole, and the sealing of hole problem is one of problem that influences the gas quality critical that safety, power consumption and extraction go out by the extraction pipe.In case poorly sealed, can cause extraction front end negative pressure deficiency, reduce extraction efficient, the waste extraction energy; Also can cause methane concentration reduction in the extraction gas, increase the post processing cost, and add the potential safety hazard of atmospheric conveying and last handling process.
In the practice, generally adopt response type foam sealing hole method, utilize response type A component and response type B component mixed foaming and curing and mixed foaming to solidify principle and carry out sealing of hole with regular hour difference.Because foam has curing rate fast (being generally 2 ~ 5 minutes), expansion multiplying power height, strong with the rib adhesion, strength and toughness is relative to advantages such as height, obtained applying comparatively widely in the gas pumping field.
In the prior art, response type foam sealing hole method generally adopts and manual mixes response type AB component, utilizes cotton to adsorb after the stirring and is wrapped on the gas pumping pipeline, inserts the extraction hole in the lump with the gas pumping pipeline.This method for sealing has following four significant drawbacks: (1) for the bigger B component of viscosity, artificial dispersion and the mixed effect that stirs is too poor, and this not only can cause waste of raw materials, also directly influences follow-up foaming and solidification effect; (2) owing to begin to be mixed into the only tens seconds blanking time (usually less than 30 seconds) of foaming from the AB component, thereby usually the gas pumping pipe in the extraction hole in the progradation response type developed foaming, friction between this moment cotton and the rib can make the abscess at foaming initial stage break in a large number and and the hole, this will reduce response type foam seal effect significantly; (3) back viscosity rises rapidly because the AB component begins to foam, therefore, the hole sealing depth of manual sealing of hole often lower (different with workman's qualification, as to be usually less than 3 meters), this is unfavorable for avoiding the cracks in coal seam band; (4) manual sealing of hole process reaction type belongs to free foaming, and abscess intensity is relatively poor, shrinks along with time lengthening produces easily, thereby loses sealability.
For overcoming the above problems, a kind of hand-rail type hole sealing device appears, promptly by being similar to the hand supercharging device of jack, AB two components of response type foam are clamp-oned " Y " font collecting pipe, the back of confluxing pours between extraction pipe and the gas pumping cell walls by a plastic pipe.Though solved the problem of manual response type foam sealing hole to a certain extent, but same existence can't be avoided the problem of coal seam microfissure, and it is in the sealing of hole process, because the foaming of AB two components of response type foam needs comparatively concentrated energy, but the seal section space is bigger, sealing material flows into behind this space because action of gravity is spread out, the foaming energy can't be concentrated, it is insufficient also just to cause foaming, and because seal cavity is uncertain, can cause sealing material skewness between extraction pipe and gas pumping passage, thereby inhomogeneous behind the foamed solidification, sealing effectiveness is poor.This shows, as long as have the material of the foaming of two kinds of component hybrid reactions, expansion and curing characteristics, have same application limitation, particularly be injected into the confined space and use, the problems referred to above are particularly evident.
Therefore, need a kind of special sealing device, make the sealing material that injects seal section can concentrate heat at the foaming initial stage at the firedamp taking-out discharging drilling sealing of hole, fully foaming, thus evenly distribute the assurance sealing effectiveness after making the sealing material foamed solidification; Simultaneously, control sealed borehole length as required, can guarantee sealing of hole, thereby make that air is difficult for infiltrating from the microfissure of coal seam, guarantee higher gas pumping concentration, and then improve gas pumping efficient greater than the cracks in coal seam bandwidth.
Summary of the invention
In view of this, the invention provides a kind of many baffle plates of response type foam sealing hole sealing device, reduced sealing material initial stage foaming space, be beneficial at the foaming initial stage and concentrate heat fully to foam; Material enters a back sealing segmentation continuation foaming by the axial material through hole of crossing on the striker plate in the foaming process, because sealing unit quantity is more relatively, and material all can form limited foaming in each sealing unit, therefore, a plurality of limited foaming sealing unit has guaranteed excellent more airtight quality; Simultaneously, the present invention can control hole sealing depth as required, thereby makes that air is difficult for infiltrating from the microfissure of coal seam, guarantees higher gas pumping concentration, and then improves gas pumping efficient.
A kind of many baffle plates of response type foam sealing hole sealing device of the present invention comprises intrusion pipe and at least two sealing of hole baffle plates, and the gas pumping pipe passes sealing of hole baffle plate plate face fixedlys connected with it, forms seal section between the adjacent sealing of hole baffle plate; Described intrusion pipe both ends open is respectively feeding mouth and discharging opening, and seal section is provided with and is positioned on the sealing of hole baffle plate of the outside and the seal section charging aperture that is connected with the intrusion pipe discharging opening;
Described seal section was provided with on the described striker plate and axially crossed material through hole by being divided at least two sealing segmentations with sealing of hole baffle plate striker plate arranged side by side vertically.
Further, the described axial material through hole of crossing is along the striker plate radial distribution in striker plate on the same circumferential position;
Further, be positioned at the most inboard sealing of hole baffle plate apart from the distance of mash gas pumping drilling orifice greater than 8 meters;
Further, described sealing of hole baffle plate is two, and the distance between two sealing of hole baffle plates can be regulated according to the sealed borehole length needs;
Further, described intrusion pipe feeding mouth is provided for being communicated with the ready-packaged joint of injection device;
Further, described sealing of hole baffle plate cylindrical is with elastic seal cartridge;
Further, described elastic seal cartridge cross section is circular.
Beneficial effect of the present invention is: many baffle plates of response type foam sealing hole sealing device of structure of the present invention, adopt striker plate that the seal section that forms between the sealing of hole baffle plate is divided into the sealing segmentation, reduced sealing material initial stage foaming space, be beneficial at the foaming initial stage and concentrate heat fully to foam; Material enters a back sealing segmentation continuation foaming by the axial material through hole of crossing on the striker plate in the foaming process, because sealing unit quantity is more relatively, and material all can form limited foaming in each sealing unit, therefore, a plurality of limited foaming sealing unit has guaranteed excellent more airtight quality; Simultaneously, sealing device of the present invention can be controlled sealed borehole length as required, guarantee sealing of hole greater than the cracks in coal seam bandwidth, thereby make that air is difficult for infiltrating from the microfissure of coal seam, guarantee higher gas pumping concentration, higher gas pumping efficient and lower extraction power consumption.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is a structural representation of the present invention;
Fig. 2 be Fig. 1 along A-A to sectional view.
The specific embodiment
Fig. 1 is a structural representation of the present invention, Fig. 2 be Fig. 1 along A-A to sectional view, as shown in the figure: many baffle plates of response type foam sealing hole sealing device of present embodiment, comprise intrusion pipe 2 and at least two sealing of hole baffle plates 3, gas pumping pipe 5 passes sealing of hole baffle plate 3 plate faces fixedlys connected with it, mode such as fixedly connected mode can adopt clip, is threaded, finger setting; Form seal section 7 between the adjacent sealing of hole baffle plate 3, described intrusion pipe 2 both ends opens are respectively feeding mouth and discharging opening, seal section 7 is provided with and is positioned on the outside sealing of hole baffle plate 3 and the seal section charging aperture 7b that is connected with intrusion pipe 2 discharging openings, as shown in the figure, when sealing of hole baffle plate 3 is two, sealing of hole baffle plate 3 outside intrusion pipe 2 passes and discharging opening are between two sealing of hole baffle plates 3, and the outside is meant the side that gas pumping pipe 5 is given vent to anger, just the side outside the gas pumping duct 6; Seal section charging aperture 7b is arranged on the sealing of hole baffle plate in the outside, and the discharging opening of intrusion pipe 2 directly is communicated with seal section charging aperture 7b; If a plurality of sealing of hole baffle plates 3 form a plurality of seal sections 7, then can adopt a plurality of intrusion pipes 2 or adopt the structure that is communicated with between the seal section 7, can both realize goal of the invention, intrusion pipe can pass sealing of hole baffle plate 3 plate face discharging openings directly as the feeding mouth of seal section 7;
Described seal section 7 was provided with on the described striker plate 4 and axially crossed material through hole 4a by being divided at least two sealing segmentation 7a with sealing of hole baffle plate 3 striker plate 4 arranged side by side vertically;
In the present embodiment, sealing of hole baffle plate 3 and striker plate 4 are circle, are applicable to that the sealing of hole of most of mash gas pumping drillings uses.
In the present embodiment, the described axial material through hole 4a that crosses is along the striker plate radial distribution in striker plate on the same circumferential position, can make sealing material pass through striker plate 4, guarantee that each sealing segmentation 4a can both carry out filling-foam in the suitable time at comparatively suitable height.
In the present embodiment, be positioned at the most inboard sealing of hole baffle plate 3 apart from the distance of extraction pipe gas outlet greater than 8 meters; Guarantee that hole sealing depth is enough dark, can avoid the cracks in coal seam band, realize the high-quality sealing of hole.
In the present embodiment, described sealing of hole baffle plate 3 is two, and the distance between two sealing of hole baffle plates 3 can regulate arbitrarily according to the sealed borehole length needs, and such as adopting dismountable mode to connect, spacing can adopt modes such as clip, screw location comparatively easily; Omnidistance airtight than from shallow to deep, the present invention only seals a bit of of boring depths, and it is airtight to have cast out low-quality shallow-layer, thereby has farthest saved material, has reduced the sealing of hole cost.
In the present embodiment, described intrusion pipe 2 feeding mouths are provided for being communicated with the ready-packaged joint 1 of injection device, adopt high pressure ready-packaged joint structure of the prior art; Save installation time, improve the extraction efficiency of construction.
In the present embodiment, described sealing of hole baffle plate 3 cylindricals are with elastic seal cartridge 3a; Reduce radial clearance as far as possible, prevent response type A component and the too much leakage of response type B component and the waste that causes.
In the present embodiment, around described elastic seal cartridge 3a radially is close to the sealing of hole baffle plate along the sealing of hole baffle plate; Can be adapted to the surface configuration of extraction duct 6 walls preferably, and be beneficial to sealing device and stretch into the extraction duct.
Response type A component and response type B component can be the materials of expansion curing of can reacting and foam after any two kinds of mixing, such as the poly-AB type sealing material etc. that inspires confidence in, certainly, comprise any two kinds of materials that can react, foam, expand and solidify after the mixing; Present embodiment adopts the poly-AB type sealing material that inspires confidence in.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. many baffle plates of response type foam sealing hole sealing device, it is characterized in that: comprise intrusion pipe and at least two sealing of hole baffle plates, the gas pumping pipe passes sealing of hole baffle plate plate face fixedlys connected with it, forms seal section between the adjacent sealing of hole baffle plate; Described intrusion pipe both ends open is respectively feeding mouth and discharging opening, and seal section is provided with and is positioned on the sealing of hole baffle plate of the outside and the seal section charging aperture that is connected with the intrusion pipe discharging opening;
Described seal section was provided with on the described striker plate and axially crossed material through hole by being divided at least two sealing segmentations with sealing of hole baffle plate striker plate arranged side by side vertically.
2. many baffle plates of response type foam sealing hole sealing device according to claim 1 is characterized in that: the described axial material through hole of crossing is along the striker plate radial distribution in striker plate on the same circumferential position.
3. many baffle plates of response type foam sealing hole sealing device according to claim 2 is characterized in that: be positioned at the most inboard sealing of hole baffle plate apart from mash gas pumping drilling orifice distance greater than 8 meters.
4. many baffle plates of response type foam sealing hole sealing device according to claim 3, it is characterized in that: described sealing of hole baffle plate is at least two, and the distance between two sealing of hole baffle plates can be regulated according to the sealed borehole length needs.
5. many baffle plates of response type foam sealing hole sealing device according to claim 4, it is characterized in that: described intrusion pipe feeding mouth is provided for being communicated with the ready-packaged joint of injection device.
6. many baffle plates of response type foam sealing hole sealing device according to claim 5 is characterized in that: described sealing of hole baffle plate cylindrical is with elastic seal cartridge.
7. many baffle plates of response type foam sealing hole sealing device according to claim 6 is characterized in that: described elastic seal cartridge cross section is for circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010581980 CN102011606B (en) | 2010-12-10 | 2010-12-10 | Reaction type foam hole sealing multi-baffle sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010581980 CN102011606B (en) | 2010-12-10 | 2010-12-10 | Reaction type foam hole sealing multi-baffle sealing device |
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| CN102011606A true CN102011606A (en) | 2011-04-13 |
| CN102011606B CN102011606B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010581980 Active CN102011606B (en) | 2010-12-10 | 2010-12-10 | Reaction type foam hole sealing multi-baffle sealing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251800A (en) * | 2011-07-13 | 2011-11-23 | 河南理工大学 | Magazine clip type hole packer |
| CN102787820A (en) * | 2012-08-24 | 2012-11-21 | 中煤科工集团重庆研究院 | Hole sealing and drilling method for downhole gas extraction in coal mine |
| CN102889068A (en) * | 2012-11-02 | 2013-01-23 | 淮南矿业(集团)有限责任公司 | Hole sealing device and method |
| CN103362542A (en) * | 2013-08-08 | 2013-10-23 | 中国矿业大学 | Sectionalized hole sealing method for bedding gas extraction drilled holes |
| CN104314607A (en) * | 2014-08-28 | 2015-01-28 | 太原理工大学 | Method for increasing coal seam drilling gas extraction concentration in multiple stages |
| CN113266415A (en) * | 2021-06-16 | 2021-08-17 | 陕西长武亭南煤业有限责任公司 | Gas extraction equipment and method with alternative pumping and pressing |
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| CN101886531A (en) * | 2010-06-14 | 2010-11-17 | 阳泉煤业（集团）有限责任公司 | Drilling and sealing method for gas drainage from coal seam |
| CN202073589U (en) * | 2010-12-10 | 2011-12-14 | 煤炭科学研究总院重庆研究院 | Multi-baffle sealing device capable of sealing holes with reactive foam |
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| JPS62242100A (en) * | 1986-04-04 | 1987-10-22 | アンステイテイ フランセ−ズ ド ペトロ−ル | Method and device for measuling characteristic of bed by horizontal boring bored from subway |
| SU1730433A1 (en) * | 1989-03-21 | 1992-04-30 | Трест "Дальвостуглеразведка" | Plugging-back method on rock inrush conditions and lost mud circulation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251800A (en) * | 2011-07-13 | 2011-11-23 | 河南理工大学 | Magazine clip type hole packer |
| CN102787820A (en) * | 2012-08-24 | 2012-11-21 | 中煤科工集团重庆研究院 | Hole sealing and drilling method for downhole gas extraction in coal mine |
| CN102889068A (en) * | 2012-11-02 | 2013-01-23 | 淮南矿业(集团)有限责任公司 | Hole sealing device and method |
| CN103362542A (en) * | 2013-08-08 | 2013-10-23 | 中国矿业大学 | Sectionalized hole sealing method for bedding gas extraction drilled holes |
| CN104314607A (en) * | 2014-08-28 | 2015-01-28 | 太原理工大学 | Method for increasing coal seam drilling gas extraction concentration in multiple stages |
| CN113266415A (en) * | 2021-06-16 | 2021-08-17 | 陕西长武亭南煤业有限责任公司 | Gas extraction equipment and method with alternative pumping and pressing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102011606B (en) | 2012-12-05 |
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Owner name: CHINA COAL TECHNOLOGY ENGINEERING GROUP CHONGQING Free format text: FORMER NAME: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RESEARCH INSTITUTE Owner name: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RE Free format text: FORMER NAME: COAL SCIENTIFIC RESEARCH INSTITUTE CHONGQING INSTITUTE |
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