CN103510943A - Instrument for measuring initial velocity of gas discharged from deep drill hole for coal mine outburst prediction - Google Patents
Instrument for measuring initial velocity of gas discharged from deep drill hole for coal mine outburst prediction Download PDFInfo
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Abstract
The invention relates to an instrument for measuring initial velocity of gas discharged from a deep drill hole for coal mine outburst prediction. The instrument comprises an expansion fluid tube, a manual hydraulic test pump, a hole sealing device, a flow tube and an orifice plate flowmeter, wherein a liquid injection tube connector and a flow tube connector are arranged at the end part of the hole sealing device; one end of the expansion fluid tube is connected with the manual hydraulic test pump; the other end of the expansion fluid tube is connected with the liquid injection tube connector; one end of the flow tube is connected with the orifice plate flowmeter; the other end of the flow tube is connected with the flow tube connector of the hole sealing device. The instrument provided by the invention can increase the depth of a drill hole and play a sealing effect on the drill hole, and is widely used in the field of initial velocity measurement of discharged gas.
Description
Technical field
The present invention relates to a kind of gas inrush initial velocity measuring apparatus, particularly about a kind of gun drilling gas inrush initial velocity analyzer for colliery outburst prediction.
Background technology
Coal mine gas is one of principal element threatening Safety of Coal Mine Production, and in order to guarantee mine safety production, national requirements is projecting coal bed takes the outburst prevention measures of " quaternity ", and outburst prediction is the first step work of " quaternity " outburst prevention measures.In numerous outburst prediction indexs, the drilling gas initial velocity prediction index of gushing out is widely used at a lot of mines.Drilling gas is gushed out after initial velocity measures and to refer to and drill and finish in coal seam, in 2 minutes, hole packer is sent into apart from the position of the 1 meter of distance in boring the place ahead, and sealing boring, measures the maximum outburst amount of this 1 meter of long gas chamber.The existing drilling gas initial velocity determining instrument of gushing out generally adopts several steel pipes to be connected to do flowtube, and escorts hole packer and enter the sealing of hole position in coal bed drilling, adopts General Purpose Rubber to make sealing of hole capsule.After drilling in coal seam, on the one hand, drilling axis is not linear, but is parabolic shape; On the other hand, borehole wall is uneven.This causes the existing drilling gas initial velocity of gushing out to measure equipment and have two defects: the one, and it is linear that the steel pipe being formed by connecting is, and the resistance of sending into non-linear boring is large, and speed is slow, therefore, in (2 minutes), the degree of depth of sending into boring is seriously limited, makes to measure drilling depth more shallow at the appointed time; The 2nd, the compressive resistance of common sealing of hole capsule is low, in practical measurement process, capsule the blowing pressure only has 0.2～0.3MPa, for rough borehole wall, is difficult to realize effective sealing, and, foot of hole is close in the rear end of sealing of hole capsule, and front end is close to boring top, and effectively sealed borehole length reduces, this situation can increase along with drilling depth, and becomes more remarkable.
Therefore, existing drilling gas is gushed out, and to measure the degree of depth superficial for initial velocity, is generally 3.5 meters, and part instrument can reach 6～8 meters after improving; In coal mine excavation process, need to frequently predict, seriously restricting the raising of digging speed, this and current high-intensity mechanical mining demand are conflicting.Therefore, need to improve the existing drilling gas initial velocity analyzer of gushing out, to improve its mensuration degree of depth.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of mensuration degree of depth that can increase drilling depth, boring is played to the gas inrush initial velocity determining instrument of effective sealing.
For achieving the above object, the present invention takes following technical scheme: a kind of gun drilling gas inrush initial velocity analyzer for colliery outburst prediction, it is characterized in that: it comprises inflation fluid pipe, Manual pressure test pump, hole packer, flowtube and orifice flowmeter, described hole packer end is provided with liquid injection pipe joint and flowtube joint; Described inflation fluid pipe one end is connected with described Manual pressure test pump, and the described inflation fluid pipe other end is connected with described liquid injection pipe joint; Described flowtube one end is connected with described orifice flowmeter, and the described flowtube other end is connected with the flowtube joint of described hole packer.
Described hole packer comprises outside described liquid injection pipe joint and described flowtube joint, also comprises pipe-blocking-proof, air inlet pipe, one-level nipple, built-in flow steel pipe, secondary nipple, sliding ring, preposition termination, steel wire capsule, rearmounted termination, external flow steel pipe and fluid injection steel pipe; The described pipe-blocking-proof described air inlet pipe front end that is threaded; Described air inlet pipe tail end and described one-level nipple threaded one end are connected and fixed, and the described one-level nipple other end is threaded after described secondary nipple front end and is set in together described built-in flow steel pipe front end; On described built-in flow steel pipe front end, be also arranged with respectively described sliding ring and described preposition termination, described preposition termination is threaded with described secondary nipple rear end, and described sliding ring is closely folded between described secondary nipple and described preposition termination; Described built-in flow steel pipe outside is also arranged with described steel wire capsule, and described preposition termination is pressed on steel wire capsule front end; Described built-in flow steel pipe tail end is welded with described rearmounted termination, described rearmounted termination is pressed on described steel wire capsule rear end, on described rearmounted termination, be also welded with described external flow steel pipe and described fluid injection steel pipe, the described external flow steel pipe rear end described flowtube joint that has been threaded, the described fluid injection steel pipe rear end described liquid injection pipe joint that has been threaded.
Described steel wire capsule comprises built-in gauze wire cloth and external rubber, and it is outside that described external rubber casts directly over described built-in gauze wire cloth, forms integral structure.
Described flowtube is made by sebific duct.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention is owing to adopting inflation fluid pipe, Manual pressure test pump, hole packer, flowtube and orifice flowmeter to form, hole packer end connects liquid injection pipe joint and flowtube joint, inflation fluid pipe one end is connected with Manual pressure test pump, and the other end is connected with liquid injection pipe joint; Flowtube one end is connected with orifice flowmeter, and the other end is connected with the flowtube joint of hole packer.And flowtube adopts sebific duct to support, so both can prevent that conventional steel from connecting the gas leakage causing because of poor sealing, had again certain flexibility, the strong adaptability to non-linear boring, can promote hole packer and move forward fast in boring, arrive darker locating.2, the present invention is owing to connecting pipe-blocking-proof in air inlet pipe, by pipe-blocking-proof, can when not hindering methane gas and entering air inlet pipe, effectively prevent that cinder from entering air inlet pipe, causes plug for air inlet pipe.3, the present invention, because flowtube adopts sebific duct, has certain flexibility, and flowtube, in used time not, can be folded, and is convenient for carrying; In use, it directly can be unclamped, send into boring precalculated position, can save the pipeline connect hours.4, the present invention is owing to adopting steel wire capsule to be made by built-in gauze wire cloth and external rubber, external rubber elastic performance is better, and built-in gauze wire cloth has certain retractility, free-extension characteristic by steel wire capsule can effectively reduce itself deformation size like this, and then improves hole packer application life.5, the present invention is owing to adopting steel wire capsule when the expanded radially, can effectively improve the stress between the hole wall of its boring, strengthens the sealing effectiveness to boring, prevents that gas from revealing from boring.The present invention can be widely used in drilling gas and gush out in initial velocity fields of measurement.
Accompanying drawing explanation
Fig. 1 is overall structure of the present invention and application schematic diagram
Fig. 2 is hole packer structural representation of the present invention
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the present invention includes an inflation fluid pipe 1, Manual pressure test pump 2, hole packer 3, flowtube 4 and an orifice flowmeter 5, hole packer 3 ends are provided with liquid injection pipe joint 6 and flowtube joint 7.Inflation fluid pipe 1 one end is connected with Manual pressure test pump 2, and the other end is connected with the liquid injection pipe joint 6 of hole packer 3; Flowtube 4 one end are connected with orifice flowmeter 5, and the other end is connected with the flowtube joint 7 of hole packer 3.During work, by flowtube 4, hole packer 3 is put into 8 borings of accomplishing fluently 9 in coal seam in advance, the bottom of boring 9 is gas chamber 10, when hole packer 3, inserts behind gas chamber 10, and the orifice flowmeter 5 being connected with hole packer 3 by flowtube 4 can detect the gas flow in gas chamber 10; Manual pressure test pump 2 can be by inflation fluid pipe 1 to the required inflation fluid of the interior injection of hole packer 3.
As shown in Figure 2, hole packer 3, except comprising liquid injection pipe joint 6 and flowtube joint 7, also comprises pipe-blocking-proof 11, air inlet pipe 12, one-level nipple 13, secondary nipple 14, built-in flow steel pipe 15, sliding ring 16, preposition termination 17, steel wire capsule 18, rearmounted termination 19, external flow steel pipe 20 and fluid injection steel pipe 21.Pipe-blocking-proof 11 air inlet pipe 12 front ends that are threaded, can, when not hindering methane gas and entering air inlet pipe 12, effectively prevent from causing air inlet pipe 12 to stop up after cinder from entering air inlet pipe 12.Air inlet pipe 12 tail ends and one-level nipple 13 threaded one ends are connected and fixed, one-level nipple 13 other ends are threaded after secondary nipple 14 front ends, one-level nipple 13 is set in built-in flow steel pipe 15 front ends together with secondary nipple 14, and then drives pipe-blocking-proof 11 and air inlet pipe 12 to slide on built-in flow steel pipe 15.On built-in flow steel pipe 15 front ends, be also arranged with respectively sliding ring 16 and preposition termination 17, preposition termination 17 is threaded with secondary nipple 14 rear ends, and sliding ring 16 is closely folded between secondary nipple 14 and preposition termination 17.Built-in flow steel pipe 15 outsides are also arranged with steel wire capsule 18, and preposition termination 17 is pressed on steel wire capsule 18 front ends by the pressure-acting of buckle machine, can prevent the leak of liquid of steel wire capsule 18 the insides; Built-in flow steel pipe 15 tail ends are welded with rearmounted termination 19, rearmounted termination 19 is also pressed on steel wire capsule 18 rear ends by the pressure-acting of buckle machine, on rearmounted termination 19, be also welded with external flow steel pipe 20 and fluid injection steel pipe 21, external flow steel pipe 20 is communicated with built-in flow steel pipe 15, and fluid injection steel pipe 21 is communicated with steel wire capsule 18.The flowtube joint 7 that has been threaded in external flow steel pipe 20 rear ends, the fluid injection steel pipe 21 rear ends liquid injection pipe joint 6 that has been threaded.
In above-described embodiment, steel wire capsule 18 comprises built-in gauze wire cloth 22 and external rubber 23, and external rubber 23 casts directly over built-in gauze wire cloth 22 outsides, forms integral structure.
In above-described embodiment, flowtube 4 is made by the suitable sebific duct of soft or hard, both can prevent that conventional steel from connecting the gas leakage causing because of poor sealing, there is again certain flexibility, strong adaptability to non-linear boring 9, can promote hole packer and move forward fast in boring 9, in 2 minutes, arrive darker locating.Flowtube 4, in used time not, can be folded, and is convenient for carrying; In use, it directly can be unclamped, send into boring precalculated position, can save the pipeline connect hours.
In the various embodiments described above, inflation fluid can enter in steel wire capsule 18 from the fluid injection steel pipe 21 of flowing through in inflation fluid pipe 1, built-in gauze wire cloth 22 and external rubber 23 in steel wire capsule 18 all have very strong elasticity, it is 6MPa that the inner maximum of steel wire capsule 18 is born pressure, can be according to the pressure size free-extension of inner inflation fluid.When injecting inflation fluid, 18 expanded radiallys of steel wire capsule and transverse contraction; When extracting inflation fluid out, steel wire capsule 18 radial contraction and lateral expansion, thus drive pipe-blocking-proof 11, air inlet pipe 12, one-level nipple 13, secondary nipple 14, sliding ring 16 and preposition termination 17 to slide on built-in flow steel pipe 15.When 18 expanded radially of steel wire capsule, can effectively improve the stress between the hole wall of itself and boring 9, strengthen holing 9 sealing effectiveness, prevent that gas from leaking out from holing 9; The free-extension characteristic of steel wire capsule 18 can effectively reduce deformation size, improves hole packer application life.
In above-described embodiment, the methane gas in gas chamber 10 enters successively air inlet pipe 12, built-in flow steel pipe 15, external flow steel pipe 20 and flowtube 4 by pipe-blocking-proof 11 and arrives orifice flowmeter 5, thereby carries out gas inrush initial velocity detection.
In sum, the present invention directly measures the drilling gas initial velocity of gushing out and comprises the following steps:
(1) hole packer 3 and inflation fluid pipe 1, flowtube 4 are connected; To in Manual pressure test pump 2, fill water, and inject steel wire capsule 18, the water that steel wire capsule is 18 li is full of, and does not want its expansion that makes with pressure.
(2) adopt conventional method in coal seam, to play a degree of depth and big or small satisfactory boring 9.
(3) hole packer 3 is sent into boring 9 precalculated positions, utilized Manual pressure test pump 2 pressurizations that steel wire capsule 18 is expanded, reach after predetermined pressure connection traffic pipe 4 and orifice flowmeter 5, the drilling gas flow of mensuration different time.
The various embodiments described above are only for illustrating the present invention; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (4)
1. the gun drilling gas inrush initial velocity analyzer for colliery outburst prediction, it is characterized in that: it comprises inflation fluid pipe, Manual pressure test pump, hole packer, flowtube and orifice flowmeter, described hole packer end is provided with liquid injection pipe joint and flowtube joint; Described inflation fluid pipe one end is connected with described Manual pressure test pump, and the described inflation fluid pipe other end is connected with described liquid injection pipe joint; Described flowtube one end is connected with described orifice flowmeter, and the described flowtube other end is connected with the flowtube joint of described hole packer.
2. a kind of gun drilling gas inrush initial velocity analyzer for colliery outburst prediction as claimed in claim 1, it is characterized in that: described hole packer comprises outside described liquid injection pipe joint and described flowtube joint, also comprises pipe-blocking-proof, air inlet pipe, one-level nipple, built-in flow steel pipe, secondary nipple, sliding ring, preposition termination, steel wire capsule, rearmounted termination, external flow steel pipe and fluid injection steel pipe; The described pipe-blocking-proof described air inlet pipe front end that is threaded; Described air inlet pipe tail end and described one-level nipple threaded one end are connected and fixed, and the described one-level nipple other end is threaded after described secondary nipple front end and is set in together described built-in flow steel pipe front end; On described built-in flow steel pipe front end, be also arranged with respectively described sliding ring and described preposition termination, described preposition termination is threaded with described secondary nipple rear end, and described sliding ring is closely folded between described secondary nipple and described preposition termination; Described built-in flow steel pipe outside is also arranged with described steel wire capsule, and described preposition termination is pressed on steel wire capsule front end; Described built-in flow steel pipe tail end is welded with described rearmounted termination, described rearmounted termination is pressed on described steel wire capsule rear end, on described rearmounted termination, be also welded with described external flow steel pipe and described fluid injection steel pipe, the described external flow steel pipe rear end described flowtube joint that has been threaded, the described fluid injection steel pipe rear end described liquid injection pipe joint that has been threaded.
3. a kind of gun drilling gas inrush initial velocity analyzer for colliery outburst prediction as claimed in claim 2, it is characterized in that: described steel wire capsule comprises built-in gauze wire cloth and external rubber, it is outside that described external rubber casts directly over described built-in gauze wire cloth, forms integral structure.
4. a kind of gun drilling gas inrush initial velocity analyzer for colliery outburst prediction as described in claim 1 or 2 or 3, is characterized in that: described flowtube is made by sebific duct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310521879.XA CN103510943A (en) | 2013-10-29 | 2013-10-29 | Instrument for measuring initial velocity of gas discharged from deep drill hole for coal mine outburst prediction |
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| CN201310521879.XA CN103510943A (en) | 2013-10-29 | 2013-10-29 | Instrument for measuring initial velocity of gas discharged from deep drill hole for coal mine outburst prediction |
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Cited By (6)
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| CN105548337A (en) * | 2016-03-15 | 2016-05-04 | 安徽理工大学 | Method for detection of gas in underwall borehole in coal mine tunnel |
| CN105735967A (en) * | 2016-04-12 | 2016-07-06 | 中国矿业大学 | Method for measuring initial emission velocity of gas from drill hole |
| CN105927214A (en) * | 2016-05-19 | 2016-09-07 | 六盘水师范学院 | Accurate measuring device and measuring method for current coal seam gas pressure |
| CN109779625A (en) * | 2019-01-25 | 2019-05-21 | 华北科技学院 | A kind of outburst prediction method and apparatus based on drilling slack coal size distribution situation |
| CN111140283A (en) * | 2020-01-17 | 2020-05-12 | 河南理工大学 | Device and method for measuring initial gas emission speed with fixed hole sealing length |
| CN113550736A (en) * | 2021-07-26 | 2021-10-26 | 重庆夏软科技有限公司 | Anomaly analysis system and method applied to oil gas collection |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105548337A (en) * | 2016-03-15 | 2016-05-04 | 安徽理工大学 | Method for detection of gas in underwall borehole in coal mine tunnel |
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| CN109779625A (en) * | 2019-01-25 | 2019-05-21 | 华北科技学院 | A kind of outburst prediction method and apparatus based on drilling slack coal size distribution situation |
| CN109779625B (en) * | 2019-01-25 | 2022-09-09 | 华北科技学院 | Method and device for prominence prediction based on size distribution condition of coal dust in drill hole |
| CN111140283A (en) * | 2020-01-17 | 2020-05-12 | 河南理工大学 | Device and method for measuring initial gas emission speed with fixed hole sealing length |
| CN113550736A (en) * | 2021-07-26 | 2021-10-26 | 重庆夏软科技有限公司 | Anomaly analysis system and method applied to oil gas collection |
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Application publication date: 20140115 |