CN105089525B - The hole flushing device of coal mine gas extraction borehole - Google Patents
The hole flushing device of coal mine gas extraction borehole Download PDFInfo
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- CN105089525B CN105089525B CN201510579831.3A CN201510579831A CN105089525B CN 105089525 B CN105089525 B CN 105089525B CN 201510579831 A CN201510579831 A CN 201510579831A CN 105089525 B CN105089525 B CN 105089525B
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Abstract
A kind of hole flushing device of coal mine gas extraction borehole, including water tank, high-pressure pump, high pressure hard tube and high-pressure hose, self-feeding bit, base, capstan winch, propulsive mechanism etc., capstan winch and propulsive mechanism are fixed on base, can make device corresponding to the drilling of diverse location and angle by each part of adjusting base；High pressure hard tube can be through propulsive mechanism before feeding drilling, and the propulsive force provided by propulsive mechanism makes high pressure hard tube be fed forward along drilling；When high-pressure hose and self-feeding bit of the water under high pressure by high pressure hard tube front end, generation high-pressure water jet is to collapsing, blocking portion carries out broken rock dredging, and is produced from into power.The present apparatus is simple in construction, and overall dimensions are smaller, and easy to adjust, is easy to use in the narrow working space of underground coal mine；Whole power pipeline can realize the conveying of long term distance, and can prevent pipeline from blocking in the case where pulling in front and others push behind collective effect power；Hole flushing speed is fast, efficiency high, can greatly save cost, improves gas pumping effect.
Description
Technical field
The invention belongs to coal mine underground coal bed gas extraction technical field, it is related to a kind of hole flushing device of mash gas pumping drilling,
It is applicable in weak seam dredge the mash gas pumping drilling that has collapsed, blocked.
Background technology
China's highly gassy mine quantity is more, and most of coal-mine gas content is high, and gas pressure is big, and geological structure is multiple
Miscellaneous, coal seam permeability is low, 2~3 orders of magnitude averagely lower than the U.S..With the increase of coal mining depth, gas pressure and watt
This content will increase, and coal seam permeability is lower, increase coal mining and gas pumping difficulty, Gas Disaster is serious.Take out coal in advance
Layer gas is the effective measures prevented Gas Disaster and ensure Safety of Coal Mine Production, but highly gassy mine coal seam is typically soft；
Southwest, 93.14% colliery minable coal seam is all with the dangerous weak seam of coal and gas prominent.In these collieries
In, because crustal stress is big, coal rock strength is low, is easily caused drilling plastic deformation and collapses seriously, so as to reduce making for drilling
With life-span and the extracting result of gas, Safety of Coal Mine Production is threatened.Therefore, find it is a kind of reduce drilling across porosity or improve pair
The technology that drilling of having collapsed carries out dredging efficiency is very necessary.
Easily occur the problems such as drilling is collapsed and blocked for above-mentioned weak seam, many scholars propose drilling solid hole, prevented
The measures such as collapse hole, as Chinese patent CN103114810A is announced《A kind of anti-collapse hole of coal bed drilling creeps into lower sleeve device with brill
And boring method》It is during drill bit is crept into, mesh sleeve is rotated together with twist drill rods using propulsion plant is combined
Enter in coal inlet desired depth, be then log out twist drill rods, and mesh sleeve is stayed among coal hole, prevent coal hole collapse hole；In
What state patent CN102226389A was announced《The anti-collapse hole pipe network of coal mine drilling and anti-collapse hole method》It is middle to be sleeved on anti-collapse hole pipe network
On the drilling rod of drilling tool, pipe network is brought into drilling using the folding drill bit in drilling rod end, and pipe network is stayed in hole, pipe is utilized
The strength support coal body of net, prevents the collapse hole that drills.However, there are following some problems in above-mentioned measure：Drilling tool and drill bit after improvement
Often structure is more complicated, heaviness；Manufacturing cost is higher；In addition, these measures can not still be fully solved collapsing, blocking for drilling
Problem, drilling is collapsed, situation about blocking still largely is present.
It is many at present that gas pumping hole is just crept into using mechanical drilling tool again for the drilling collapsed and blocked in colliery
Method carries out drilling dredging.What Chinese patent literature CNI02312660A was announced《Borehole cleaning drilling tool》In devise it is a kind of simple in construction
Mechanical borehole cleaning drilling tool, but such mechanical drilling tool is that, using the method for mending brill again, quantities is big, and cost is high, and exists and bore
Machine device to hole is difficult, drilling efficiency is low, move back brill needs to waste the problems such as needing sealing of hole again after plenty of time, drilling.With water under high pressure
Developing rapidly for jet theory and technology, has scholar to propose waterpower hole flushing technology.As China specially you first profit
What CN103015898A was announced《A kind of mining hydraulic power operation machine》Steel pipe is used for underground coal mine, a kind of gas pumping hole is devised
Waterpower working rig.The working rig compact conformation, can adjust underground coal mine pore-forming position and direction, can under mine to it is multi-faceted enter
Row thin hole, reaming, slot, pressure break etc.；But the working rig build is huge, it is difficult to adapt to the narrow and small working space in underground；Meanwhile, made
Winding steel pipe hardness is big, fatiguability is damaged, and easily occurs card pipe in drilling process, when carrying out forcing to promote, bores inclined
Etc. phenomenon.
At present, solve weak seam and easily drill the method and apparatus for collapsing and blocking seldom, and there is more ask
Topic.Therefore, find the method that can effectively reduce drilling across porosity and the device that invention can improve drilling dredging efficiency is particularly significant.
The content of the invention
It is an object of the invention to the deficiency for existing apparatus coal bed drilling dredging efficiency can be effectively improved there is provided one kind
Device, realize simple in construction, equipment size is small, do not block pipe during hole flushing, do not bore the purpose such as partially.
To achieve the above object, the present invention uses following technical scheme：
The hole flushing device of coal mine gas extraction borehole proposed by the present invention is mainly hard including water tank, high-pressure pump, high pressure
Pipe and high-pressure hose, self-feeding bit, base, capstan winch, propulsive mechanism etc..Its self-feeding bit is carried out to the part that blocks, collapses
Dredging, reaming, and be produced from into thrust；Capstan winch winds high pressure hard tube, realizes and high pressure hard tube is carried out to put pipe and closed tube automatically；Push away
Enter mechanism and provide thrust to high pressure hard tube；Capstan winch and propulsive mechanism are fixed on base, and by adjusting height and angle realization pair
The drilling of diverse location and different angle is dredged.Their annexation is：The water outlet connection high-pressure pump of water tank, high-pressure pump
It is connected by high-voltage tube with capstan winch, and water under high pressure is conveyed to the high pressure hard tube being wrapped on capstan winch by high pressure sealing water tail,
High pressure hard tube passes through propulsive mechanism before feeding drilling, and the propulsive force provided by propulsive mechanism makes high pressure hard tube along brill
Hole is fed forward, and high pressure hard tube front end is sequentially connected high-pressure hose and self-feeding bit, and self-feeding bit is produced from into thrust, right
Block, part of collapsing is dredged, reaming.
The drill bit is self-feeding bit, is divided into three parts by the jet of this drill bit：Preceding jet, middle jet and after penetrate
Stream.Preceding jet is crushed to the rock for the part that blocks, collapses, and the effect with certain reaming；Middle jet has to drill bit
Centralizing function, can effectively prevent drill bit from boring inclined；Jet provides for the drilling of drill bit afterwards enters power certainly, and further reaming and row
Slag.
The concrete structure of self-feeding bit include bit body and bit body on center self-oscillation nozzle, side nozzle, in
Portion's nozzle and posterior nozzle, bit body have front platform and internal cavities；The bit body front portion is spherical, before front end face is
Portion's platform, is setting center self-oscillation nozzle on self-feeding bit axis in Platform center, center self-excitation is surrounded on platform
Vibrating nozzles surrounding is evenly arranged side nozzle；The bit body rear end is openend, is used to connect high-pressure hose provided with internal thread；
The internal cavities of bit body are the combination cavity of leading portion cone and back segment cylinder, and the taper of conical section is
The propulsive mechanism includes frame, synchronous pulley, compresses belt wheel, special-shaped synchronous cog belt, with the pneumatic of reductor
Motor, speed reducer output shaft, follower shaft, compress wheel shaft, compressor arm, spring, wing nut, conduit saddle mechanism, dust cover and
Corresponding link member.Concrete structure relation is as follows：
A pair of synchronous pulleys are arranged in frame, and one is driving wheel, is connected with the speed reducer output shaft of air motor, separately
One is to be connected between driven pulley, two belt wheels by special-shaped synchronous cog belt, and the outer surface of special-shaped synchronous cog belt has and high pressure
The U-lag of hose outside diameter matching.
A pair of compression belt wheels are by compressing wheel shaft in frame, with synchronous pulley up and down just to coordinating, two holddown belts
Connected, produced by the abundant contact of special-shaped synchronous cog belt and high pressure hard tube by another special-shaped synchronous cog belt between wheel
Raw frictional force provides propulsive force, so as to realize the compression to high pressure hard tube.
One end, spring and the spring cup for compressing wheel shaft are enclosed on compressor arm, and wing nut is screwed into compressor arm upper end
Tight against spring cup, lower spring end is pressed on compression wheel shaft, can make the spring-compressed on compressor arm by adjusting wing nut, real
Now compress above and below belt wheel and adjust.
Conduit saddle mechanism is arranged on whole propulsion plant foremost, and it has regulation stock, and regulation stock lower end passes through axle
Pin is arranged in frame, can carry out the rotation of different angles around pivot pin, and in frame centered on pivot pin in same radius
Multiple adjustment holes are set, regulation stock provided with a regulation positioning hole, regulation positioning hole respectively it is corresponding with each adjustment hole simultaneously
After being connected, the angular adjustment of regulation stock is realized, first order regulation is formed；The upper end of regulation stock is fixed with regulating bolt
One " T " font guide rail, guide rail can be rotated by regulating bolt around regulation stock upper end, form two grades of regulations；Guide rail two ends are each
A hole is opened so that guide wheel shaft passes through, is installed with reeded directive wheel on guide wheel shaft, it is hard for high pressure between two directive wheels
The space that pipe passes through；Guide wheel shaft two ends are fixed by pad and split pin, and have respectively covered an extension spring to protect at two ends
Hold the balance of overall guide wheel shaft and directive wheel.
The power pipeline of the present invention is high pressure hard tube and partial high-pressure hose, and high pressure hard tube uses high-pressure resin pipe, its
Internal diameter is about 2 times of high-pressure hose diameter.High pressure hard tube can be wrapped on the capstan winch of certain diameter, while there is certain rigidity,
Can transmitting thrust；Its front end is connected with the high-pressure hose with self-feeding bit, and high-pressure hose enters under power certainly what drill bit was produced
Advance；Therefore, whole pipeline above high-pressure hose " pulling force " and propulsive mechanism passes through frictional force institute to high pressure hard tube below
Realized under the collective effect of " thrust " that provides and medium-length hole is dredged.
The capstan winch is used to wind high pressure hard tube and carries out winding displacement and take-up, and power, Ji Nengshi are provided using air motor
Existing rotating can also adjust rotating speed, be easy to carry out automatic unwrapping wire and take-up to high pressure hard tube；Capstan winch passes through high pressure sealing water simultaneously
Tail is connected with the pressure duct being connected from high-pressure pump；It is manual bus cable device in the front end of capsizing moment pawl-rim, capstan winch can be achieved to pipe
Road carries out manual winding displacement.
The capstan winch and propulsive mechanism of the present invention is each attached on base, can correspond to device by each part of adjusting base
The drilling of diverse location and angle.
The base is made up of bottom support frame, supporting leg, guide rail, propulsive mechanism support, additional body and fixed plate；Bottom
Portion's support frame surrounding is hinged with folding additional body, keeps the stability of whole base；The lower end of supporting leg and guide rail is equal
It is hinged on the support frame of bottom, one is distributed with along its length on installation propulsive mechanism support, propulsive mechanism support on guide rail is
Row adjustment hole, is connected by adjustment hole with guide rail, realizes the regulation of propulsive mechanism support flexible length on guide rail；Supporting leg
Upper end is connected using adjusting screw with the adjustment hole of propulsive mechanism support, so as to adjust the angle of guide rail；Capstan winch and propulsive mechanism
It is separately fixed at respectively by fixed plate on the bottom support frame and propulsive mechanism support of base, position can adjust.Wherein lead
The regulation of the angle of rail and the length of propulsive mechanism support is significantly to adjust, and is the brill for different height and different angles
Hole and adjust；And the regulation that fixed plate is small range is designed, and capstan winch and propulsive mechanism are on the one hand easily installed, it is on the other hand favourable
In being fixed on suitable installation site, it is set mutually to coordinate with complete equipment.Whole understructure is simple, easy to adjust, it is adaptable to
Drilling to diverse location and angle in the narrow space of underground coal mine is adjusted.
The present invention the course of work be：
According to across hole, the position of blocking drilling and angle, the bottom support frame of base is fixed, and adjusts support on base
The length of propulsive mechanism support in the angle and guide rail of leg and guide rail；Then capstan winch and propulsive mechanism are fixed on base,
And connect power pipeline.It is conveyed to through piping and high pressure sealing water tail as the water under high pressure produced by high-pressure pump and is wrapped in capstan winch
On high pressure hard tube, high pressure hard tube feeding drilling before can through propulsive mechanism, the propulsive force provided by propulsive mechanism
High pressure hard tube is set to be fed forward along drilling；When high-pressure hose and self-feeding bit of the water under high pressure by high pressure hard tube front end,
Generation high-pressure water jet is to collapsing, blocking portion carries out broken rock dredging, and is produced from into power；Therefore whole power pipeline is above
Under the collective effect of " thrust " that " pulling force " of high-pressure hose and below propulsive mechanism are provided by frictional force high pressure hard tube
The conveying of long term distance can be realized, so as to realize the dredging to medium-length hole.
Hole flushing device of the present invention is compared with existing apparatus, mainly with advantages below：
1. the self-feeding bit that hole flushing device is used have higher efficiency of breaking rock and can produce it is larger enter thrust certainly,
Hole flushing efficiency high；And wherein jet has centralizing function, it can effectively prevent and treat drill bit and bore inclined.
2. a hole flushing device uses power pipeline for high pressure hard tube and high-pressure hose combined pipeline, high pressure hard tube can be bent
Wind and bear, transmit certain thrust, can overcome the disadvantages that self-feeding bit limits the defect of hole flushing depth because of tractive force deficiency, make
Hole flushing depth is greatly increased；High-pressure resin pipe is used high pressure hard tube, its internal diameter is larger, and inner wall smooth more, pressure damage can be reduced
Lose, meet the hydraulic pressure required for self-feeding bit broken rock drilling；, can be more preferably with entering certainly and the high-pressure hose flexibility of front end is more preferably
Formula drill bit advances；Whole piping can realize the effect of " pulling in front and others push behind ", make to promote comprehensively distance far, and can prevent pipeline from blocking.
3. the propulsive mechanism of a hole flushing device is a kind of propulsive mechanism for high pressure hard tube, the frictional force provided is big,
Small to the local damage of pipeline, mechanism uses air motor, with explosion prevention function, can realize the conveying and take-up of high pressure hard tube,
Also stepless time adjustment can be carried out, and it is simple in construction, and size is smaller, and light weight, service life is long, can efficiently accomplish in waterpower drilling
To the conveying of high pressure hard tube during deep hole.
4. the power of a hole flushing device is provided by air motor, there is explosion-proof performance in underground coal mine, can realize just
Reversion can also carry out stepless time adjustment, make the simple to operate of device, have a safety feature.
5. the understructure of a hole flushing device is simple, and can adjust the angle of guide rail and the length of propulsive mechanism support, make
It adapts to the drilling of all kinds of positions and angle.
6. a hole flushing device is fixed by base, capstan winch and propulsive mechanism are each attached on base, easy for installation, and are filled
Put overall dimensions small, light weight is easy to move and assembled, and can well adapt to underground coal mine narrow space.
On the whole, the present apparatus is simple in construction, and overall dimensions are smaller, and easy to adjust, is easy to narrow in underground coal mine
Working space in use；Whole power pipeline can realize the conveying of long term distance, and energy in the case where pulling in front and others push behind collective effect power
Prevent pipeline from blocking；Hole flushing speed is fast, efficiency high, can greatly save cost, improves gas pumping effect.
Brief description of the drawings
Fig. 1 is the structural representation of this hole flushing device；
Fig. 2 is the left view of the self-feeding bit of this hole flushing device；
Fig. 3 is A-A profiles of the self-feeding bit of this hole flushing device；
Fig. 4 is B-B profiles of the self-feeding bit of this hole flushing device；
Fig. 5 is the enlarged drawing of the center self-oscillation nozzle section of the self-feeding bit of this hole flushing device；
Fig. 6 is self-feeding bit side nozzle drift angle and the schematic diagram of subtended angle of this hole flushing device；
Fig. 7 is the front view of the propulsion plant of this hole flushing device (without dust cover)；
Fig. 8 is A-A profiles of the propulsion plant of this hole flushing device；
Fig. 9 is B-B profiles of the propulsion plant of this hole flushing device；
Figure 10 and Figure 11 are the front elevation and E-E profiles of the conduit saddle mechanism of this hole flushing device.
Figure 12 a and Figure 12 b are the front view and top view of this hole flushing device pedestal；
Figure 13 a and Figure 13 b are the top views of propulsive mechanism support and bottom support frame on this hole flushing device pedestal；
Figure 14 is the structural representation of this hole flushing device capstan winch；
Figure 14 a are Figure 14 A-A profiles.
Drawing reference numeral explanation：
1-water tank, 2-high-pressure pump, 3-capstan winch, 4-high pressure hard tube, 5-propulsive mechanism, 6-base, 7-high pressure is soft
Pipe, 8-self-feeding bit；
5.1-frame, 5.2-abnormal shape synchronous cog belt, 5.3-synchronous pulley, 5.4-sunk screw, 5.5-shaft end gear
Plate, 5.6-compress wheel shaft, 5.7-compression belt wheel, 5.8-compressor arm, 5.9-spring, 5.10-spring cup, 5.11-butterfly
Nut, 5.12-conduit saddle mechanism, 5.13-follower shaft, 5.14-round nut, 5.15-bearing pin (including split pin), 5.16-
Plain cushion, 5.17-bolt and and its nut, 5.18-speed reducer output shaft, the 5.19-air motor with reductor, 5.20-
Fillister head screw, 5.21-dust cover, 5.22-guide rail, 5.23-guide wheel shaft, 5.24-extension spring, 5.25-nylon guide
To wheel, 5.26-regulation stock, 5.27-regulation positioning hole；
6.1-bottom support frame, 6.2-guide rail, 6.3-supporting leg, 6.4-fixed plate, 6.5-additional body, 6.6-
Propulsive mechanism support；
8.1-front platform, 8.2-self-oscillation nozzle, 8.3-side nozzle, 8.4-middle part nozzle, the spray of 8.5-rear portion
Mouth, 8.6-internal thread, 8.7-internal cavities, 8.8-upstream nozzle, 8.9-the self-excited oscillation cavity, 8.10-downstream nozzle.
3.1-manual wire-arranging mechanism, 3.2-high pressure sealing water tail, 3.3-spoke, 3.4-capstan winch baffle plate, 3.5-capstan winch
Central shaft, the 3.6-air motor with reductor.
Embodiment
The embodiment to this hole flushing device is described further below in conjunction with the accompanying drawings：
As shown in figure 1, the hole flushing device of mash gas pumping drilling proposed by the present invention, mainly by water tank (1), high-pressure pump (2),
High pressure hard tube (4) and high-pressure hose (7), self-feeding bit (8), base (6), capstan winch (3), propulsive mechanism (5) etc. are constituted.Water tank
(1) water outlet connection high-pressure pump (2), high-pressure pump is connected by high-voltage tube with capstan winch (3), and by high pressure sealing water tail by high pressure
Water is conveyed to the high pressure hard tube (4) being wrapped on capstan winch (3), and high pressure hard tube (4) passes through propulsive mechanism before feeding drilling
(5) propulsive force, provided by propulsive mechanism makes high pressure hard tube be fed forward along drilling, and high pressure hard tube (4) front end is successively
High-pressure hose (7) and self-feeding bit (8) are connected, self-feeding bit (8) is produced from into thrust, part is carried out to blocking, collapsing
Dredging, reaming.
Its operation principle is：According to across hole, the position of blocking drilling and angle, fix and regulate base (6), then will
Capstan winch (3) and propulsive mechanism (5) are fixed on base (6), and connect power pipeline；As the high pressure produced by high-pressure pump (2)
Water is conveyed to the high pressure hard tube (4) being wrapped on capstan winch (3) through piping and high pressure sealing water tail (16), and high pressure hard tube (4) exists
Can be through the propulsive mechanism (5) on base rail (10) before feeding drilling, the propulsive force provided by propulsive mechanism (5) makes
High pressure hard tube (4) is fed forward along drilling；When water under high pressure passes through the high-pressure hose (7) and self-advancing type of high-pressure resin hard tube front end
During drill bit (8), generation high-pressure water jet is to collapsing, blocking portion carries out broken rock dredging, and is produced from into power.Therefore whole power
Pipeline can be real under the collective effect of " thrust " that propulsive mechanism (5) is provided at " pulling force " of above high-pressure hose (7) and below
The conveying of existing long term distance, so as to realize the dredging to medium-length hole.
The power pipeline of the present apparatus is high pressure hard tube (4) and partial high-pressure hose (7), and high pressure hard tube uses high-pressure resin
Pipe, its internal diameter is about 2 times of high-pressure hose diameter, and inner wall smooth.High pressure hard tube (4) can be wrapped in the capstan winch of certain diameter
(3) on, while there is certain rigidity, can transmitting thrust；Its front end is connected with the high-pressure hose (7) with self-feeding bit, high
Pressure flexible pipe (7) enters under power to advance certainly what self-feeding bit (8) was produced；Therefore, the power that whole pipeline advances is above high pressure
" pulling force " of flexible pipe (7) and below the collective effect power of " thrust " that propulsive mechanism (5) is provided.Such progression hole flushing
Efficiency high, and easily block pipe unlike mechanical hole flushing.
As shown in Figures 2 to 6, present invention employs the self-feeding bit of unique structure (8), it includes bit body and drill bit
Center self-oscillation nozzle (8.2), side nozzle (8.3), middle part nozzle (8.4) and posterior nozzle (8.5) on body.Bit body has
There are front platform (8.1) and internal cavities (8.7).The bit body rear end is openend, is used to connect provided with internal thread (8.6)
High-pressure hose.The internal cavities (8.7) of bit body are the combination cavity of leading portion cone and back segment cylinder, the cone of conical section
Spend and be
Self-feeding bit (8) front portion is spherical, and front end is a platform (8.1), and Platform center sets center self-oscillation to spray
Mouth (8.2), its surrounding is evenly arranged the side nozzle (8.3) with certain subtended angle α and drift angle β, as shown in figure 12, to subtended angle α and
Drift angle β definition is：Side nozzle starting point c will be crossed and the straight line cc ＇ parallel with drill axis oo ＇ is defined as straight line one, straight line one
Plane one is defined as with plane oo ＇ d ＇ d determined by drill axis；It is baseline with straight line one, first to side jet in plane one
Way out deflects certain angle to the direction away from drill axis, and this angle initialization is subtended angle α, now determines nozzle-axis ce
Justice is straight line two；It is rotary shaft with straight line one again by straight line two using side nozzle starting point as origin, rotates certain cone angle, gained
Nozzle-axis cf is defined as the actual axis of straight line three, as front nozzle, now by straight line two and straight line three in self-feeding bit
The angle of projection ec ＇ and fc ＇ on cross section is set as drift angle β.All side nozzles are all according to said method evenly arranged, and deflection
Angle and direction is consistent.The middle part nozzle (8.4) in cross-section with certain deviation angle θ is evenly distributed with the middle part of drill bit,
As shown in figure 9, cross section referred to the axis and the plane vertical with drill axis of middle part nozzle, deviation angle θ refers to that middle part is sprayed
The axis of mouth and the angle of radial direction radius.Drill bit rear end is openend, and inside is soft for connecting high pressure provided with internal thread (8.6)
Pipe, it is in certain cone angle Φ posterior nozzle (8.5) that it is evenly arranged with axis above, as shown in Fig. 2 cone angle Φ refers to rear portion
The axis of nozzle and the angle of drill axis.
Visible with reference to Fig. 2 and Fig. 4, the number of side nozzle (8.3) is 3-4, and nozzle diameter is 0.5mm-1.0mm, point
Cloth radius R1 is 1.0mm-10.0mm, and subtended angle α is between 15 ° -30 °, preferably 25 °, and drift angle β is optimal between 60 ° -90 °
For 360 °/n (n refers to side nozzle number).Distribution radius R1 refers to side injection stream export center to the distance of drill axis.
Visible with reference to Fig. 3, the front-end platform (8.1) of drill bit reduces the overall dimensions of drill bit, is easy to get out on platform
Center self-oscillation nozzle (8.2) and side nozzle (8.3), its radius R2 are 10.5mm -4.0mm.The number of posterior nozzle (8.5)
Mesh is 6-8, and nozzle diameter is 0.5mm-1.5mm, and axial cone angle Φ is between 10 °-30 °, and optimal is 25 °.In bit body
Portion is the combination cavity of cone and cylinder, combines the cone angle of cavity conical section between 20 ° -45 °, the cone angleSelection
Principle is to make the local losses of jet minimum, easy to process.
Visible with reference to Fig. 4, the number of middle part nozzle (8.4) is 3-4, and nozzle diameter is 0.5mm-1.0mm, the deviation angle
θ is between 30 ° -45 °.The main function of middle part nozzle is centralizing function, and broken rock repaiies hole and acts on weaker, while its jet is anti-
The torque that impulse force is produced can tighten drill bit.It is thus impossible to too greatly can not be too small,
Visible with reference to Fig. 5, center self-oscillation nozzle (8.2) is arranged on self-feeding bit axis, is sprayed successively by upstream
Mouth (8.8), the self-excited oscillation cavity (8.9) and downstream nozzle (8.10) composition.Self-oscillation cavity length L is generally upstream nozzle diameter
2.3~3.3 times of d1, downstream nozzle diameter d2 is generally 1.2~1.3 times of upstream nozzle diameter d1.The self-excited oscillation cavity (8.9)
Main body be cylindrical cavity, 18 times of its a diameter of upstream nozzle diameter d1；The vertical section of cavity is symmetrical above and below parallel four
Side shape, cavity upstream and downstream nozzle impingement wall is taper surface, and upstream nozzle impact walls are convex to upstream, and downstream nozzle impact walls are concaved towards
Downstream.
One of another key point of the present invention is to employ propulsive mechanism (5), and referring to Fig. 7 to Figure 11, it includes frame
(5.1), synchronous pulley (5.3), compression belt wheel (5.7), special-shaped synchronous cog belt (5.2), the air motor with reductor
(5.19), speed reducer output shaft (5.18), follower shaft (5.13), compress wheel shaft (5.6), compressor arm (5.8), spring (5.9),
Wing nut (5.11), conduit saddle mechanism (5.12), dust cover (5.21) and corresponding link member.
Referring to Fig. 7, Fig. 8 and Fig. 9, both sides are respectively symmetrical arranged a pair of belt wheels above and below high-pressure hose, and downside is drive pulley
(5.3), including driving pulley and driven pulley, upside is installed in frame (5.1) to compress belt wheel (5.7).Driving pulley
(5.3) it is connected by speed reducer output shaft (5.18) with the air motor (5.19) with reductor, driving pulley and driven pulley
(5.3) the special-shaped synchronous cog belt (5.2) with U-shaped groove is cased between, when air motor (5.19) drives driving pulley (5.3)
During rotation, driven pulley (5.3) will together be rotated in the presence of special-shaped synchronous cog belt (5.2).Air motor used
(5.19) there is explosion-proof performance, use piston type pneumatic motor more, rotating can be realized, can also carry out stepless time adjustment, rotating speed
It is relatively slow, but the moment of torsion provided is big, and rotating speed can be adjusted by adjusting air inflow, so as to be crept into from not in the same time different
Speed matches.
The compressor arm (5.8) for compressing belt wheel (5.7) is that a top is that cylinder bottom is cubical rod member, and top is justified
Post is threaded, and its size and wing nut (5.11) are supporting, and the cross section of lower cube is square, and its size is with compressing
Wheel shaft (5.6) is supporting.
The left side for compressing wheel shaft (5.6) is cylindrical drive shaft, and the right is hollow cube, and its size can be such that it is just enclosed on
On compressor arm (5.8) lower cube, so as to realize moving up and down for contact roller.
Whole compressor arm (5.8) is welded in the frame of propulsion plant (5.1).Compress and pressure is installed on wheel shaft (5.6)
The special-shaped synchronous cog belt (5.2) of identical is cased between bearing up pulley (5.7), two contact rollers (5.7).By tightening on compressor arm (5.8)
Wing nut (5.11) come holddown spring lid (5.10) and spring (5.9), so as to promote moving down for contact roller (5.7), complete
To the compression of high-pressure hose, the offer of frictional force is realized.This compression mode has certain elasticity, can under bad environment work
Make.
As shown in Figure 10 and Figure 11, propulsion plant front end is a conduit saddle mechanism (5.12), and it is by regulation stock (5.26), Buddhist nun
Imperial directive wheel (5.25), guide rail (5.22), extension spring (5.24) and other link members composition.Adjust stock (5.26) lower end
Be arranged on by pivot pin in frame (5.1), can carry out the rotation of different angles around pivot pin, and in frame centered on pivot pin
Multiple adjustment holes are set in same radius, regulation stock provided with a regulation positioning hole (5.27), regulation positioning hole respectively with
Each adjustment hole correspondence and the angle that a certain needs are fixed on by screw bolt and nut, realize the angular adjustment of regulation stock, shape
Into first order regulation, this is first order regulation.The upper end of regulation stock (5.26) secures a guide rail (5.22) with bolt, leads
Rail (5.22) is " T " font, and a hole is respectively opened so that guide wheel shaft (5.23) passes through in two ends；With reeded nylon directive wheel
(5.25) space that string passes through between one side of guide wheel shaft (5.23), two directive wheels (5.25) for high pressure hard tube；Directive wheel
Axle (5.23) two ends are fixed by pad (5.16) and split pin (5.15), and respectively covered at two ends an extension spring (5.24)
To keep the balance of overall guide wheel shaft (5.23) and directive wheel (5.25)；The whole front end of regulation stock (5.26) can pass through
Regulating bolt makes it be rotated with guide rail (5.22) around bolt, is easy in the smooth feeding hole of high-voltage tube, so as to avoid high pressure
Pipe port wall turn it is too urgent cause resistance excessive, this be the second level regulation.Whole deposit mechanism is adjusted by the first order
High pressure hard tube is smoothly sent into diverse location and the brill at inclination angle by stock (5.26) and second level regulation guide rail (5.22) to realize
Kong Zhong.
In addition, whole propulsion plant is protected with aluminium alloy sheet dust cover (5.21), the entrance of dust can be effectively reduced,
Improve the propulsion effect and service life of mechanism, it is ensured that the safety of operating personnel.
Referring to Figure 12 a, Figure 12 b, Figure 13 a and Figure 13 b, the base (6) of the present apparatus is by bottom support frame (9), supporting leg
(11), guide rail (10), propulsive mechanism support (14), additional body (13) and fixed plate (12) etc. are constituted.
Bottom support frame (6.1) surrounding is hinged with folding additional body (6.5), when it is extended, increases base
Bottom out area, so as to ensure the stability of whole base.The lower end of supporting leg (6.3) and guide rail (6.2) is hinged on bottom
On support frame (6.1), installed on guide rail (6.2) on propulsive mechanism support (6.6), propulsive mechanism support (6.6) along its length
A series of adjustment holes are distributed with, are connected by adjustment hole with guide rail (6.2), realize that propulsive mechanism support (6.6) is stretched on guide rail
The regulation of contracting length；The upper end of supporting leg (6.3) is connected using adjusting screw with the adjustment hole of propulsive mechanism support (6.6), from
And adjust the angle of guide rail (6.2)；Capstan winch (3) and propulsive mechanism (5) are separately fixed at base by fixed plate (6.4) respectively
On bottom support frame (9) and propulsive mechanism support (6.6), position can adjust whole understructure simply, easy to adjust, be applicable
It is adjusted in the drilling to diverse location and angle in the narrow space of underground coal mine.
As shown in Figure 14 and Figure 14 a, the capstan winch (3) of the present apparatus is by capstan winch baffle plate (3.4), spoke (3.3), high pressure sealing water
The composition such as tail (3.2), capstan winch central shaft (3.5), the air motor (3.6) with reductor and manual wire-arranging mechanism (3.1).Capstan winch
Baffle plate (3.4) and spoke (3.3) constitute the winding disc of high pressure hard tube (4), and its rotary shaft is capstan winch central shaft (3.5)；In
One end of heart axle (3.5) is high pressure sealing water tail (3.2), the pressure duct for connecting high-pressure pump (2)；Central shaft (3.5) is another
One end is the air motor (3.6) with reductor, drives winding disc to rotate, realizes unwrapping wire and the take-up of high pressure hard tube (4)；Pass through
The air inflow of regulation motor (3.6) can make the fltting speed synchronization of the payingoff speed and propulsive mechanism (5) of capstan winch (3), and can
Its reversion is set to carry out take-up；It is a manual wire-arranging mechanism (3.1) in the front end of capstan winch (3), manual winding displacement can be carried out to capstan winch.
Schematical embodiment of the invention is the foregoing is only, and is not used to determine the scope of the present invention, in this hair
On the basis of bright disclosed technology and scheme, those skilled in the art can according to disclosed in this patent technology contents, it is not necessary to
Performing creative labour can just make some modifications and variations to some of which technical characteristic, and these modifications and variations are at this
In the protection domain of invention.
Claims (7)
1. a kind of hole flushing device of coal mine gas extraction borehole, it is characterised in that including water tank（1）, high-pressure pump（2）, it is high
Press hard tube（4）, high-pressure hose（7）, self-feeding bit（8）, base（6）, capstan winch（3）And propulsive mechanism（5）；The water tank（1）
Water outlet connection high-pressure pump（2）, high-pressure pump passes through high-voltage tube and capstan winch（3）It is connected, and by high pressure sealing water tail by water under high pressure
It is conveyed to and is wrapped in capstan winch（3）On high pressure hard tube（4）, high pressure hard tube（4）Propulsive mechanism is passed through before feeding drilling（5）,
The propulsive force provided by propulsive mechanism makes high pressure hard tube be fed forward along drilling, high pressure hard tube（4）Front end is sequentially connected
High-pressure hose（7）And self-feeding bit（8）, self-feeding bit（8）It is produced from into thrust, the part that blocks, collapses is dredged,
Reaming；
The self-feeding bit (8) includes the center self-oscillation nozzle on bit body and bit body（8.2）, side nozzle (8.3),
Middle part nozzle (8.4) and posterior nozzle (8.5), the bit body front portion is spherical, and front end face is front platform (8.1), preceding
Portion's Platform center is setting center self-oscillation nozzle on self-feeding bit axis（8.2）, in front platform around center certainly
Induced Oscillation nozzle（8.2）Surrounding is evenly arranged side nozzle (8.3)；The bit body rear end is openend, provided with internal thread (8.6)
For connecting high-pressure hose；Bit body has internal cavities（8.7）, it is leading portion cone and the combination sky of back segment cylinder
Chamber, the taper of conical section is φ；
The propulsive mechanism (5) includes frame（5.1）, synchronous pulley（5.3）, compress belt wheel（5.7）, special-shaped synchronous cog belt
（5.2）, the air motor with reductor（5.19）, speed reducer output shaft（5.18）, follower shaft（5.13）, compress wheel shaft
（5.6）, compressor arm（5.8）, spring（5.9）, wing nut（5.11）, conduit saddle mechanism（5.12）And corresponding link member；
A pair of synchronous pulleys（5.3）Installed in frame（5.1）On, one is driving wheel, with air motor（5.19）Reductor
Output shaft（5.18) connect, another is to pass through special-shaped synchronous cog belt between driven pulley, two belt wheels（5.2）Connection, abnormity is same
There is the U-lag matched with high-pressure hose external diameter the outer surface of step cog belt；
A pair of compression belt wheels（5.7）By compressing wheel shaft（5.6）Installed in frame（5.1）On, with synchronous pulley（5.3）Up and down just
To coordinating, two compress belt wheel（5.7）Between pass through another special-shaped synchronous cog belt（5.2）Connection, it is synchronizing jugged by abnormity
Band（5.2）Propulsive force is provided with the frictional force produced by the abundant contact of high pressure hard tube, the compression to high pressure hard tube is realized；
Compress wheel shaft（5.6）One end, spring（5.9）And spring cup（5.10）It is enclosed on compressor arm（5.8）On, wing nut
（5.11）It is screwed into compressor arm（5.8）Upper end is tight against spring cup（5.10）, spring（5.9）Lower end is pressed in compression wheel shaft（5.6）On,
By adjusting wing nut（5.11）Compressor arm can be made（5.8）On spring（5.9）Compression, realizes and compresses belt wheel（5.7）On
Lower regulation；
Conduit saddle mechanism（5.12）Installed in whole propulsion plant foremost, it has regulation stock（5.26）, adjust stock
（5.26）Lower end passes through pivot pin（5.15）Installed in frame（5.1）On, the rotation of different angles can be carried out around pivot pin, and in frame
On multiple adjustment holes are set centered on pivot pin in same radius, regulation stock is provided with a regulation positioning hole（5.27）,
Regulation positioning hole is corresponding with each adjustment hole respectively and after being connected, and realizes the angular adjustment of regulation stock, the formation first order
Regulation；Adjust stock（5.26）Upper end " T " font guide rail is fixed with regulating bolt（5.22）, " T " font guide rail
（5.22）Can be around regulation stock by regulating bolt（5.26）Upper end is rotated, and forms two grades of regulations；" T " font guide rail（5.22）Two
A hole is respectively opened so as to guide wheel shaft in end（5.23）Pass through, with reeded directive wheel（5.25）Installed in guide wheel shaft（5.23）
On, two directive wheels（5.25）Between the space that passes through for high pressure hard tube；Guide wheel shaft（5.23）Two ends pass through pad（5.16）With
Split pin（5.15）It is fixed, and respectively covered at two ends an extension spring（5.24）To keep overall guide wheel shaft（5.23）With lead
To wheel（5.25）Balance；
Capstan winch（3）Wind high pressure hard tube（4）, and realize to high pressure hard tube（4）Carry out automatic unwrapping wire and take-up；
Capstan winch（3）And propulsive mechanism（5）It is each attached to base（6）On, by each part of adjusting base device can be made to correspond to not
With the drilling of position and angle；
The base（6）By bottom support frame（6.1）, supporting leg（6.3）, guide rail（6.2）, propulsive mechanism support（6.6）, it is additional
Support（6.5）And fixed plate（6.4）Composition；Bottom support frame（6.1）Surrounding is hinged folding additional body（6.5）, keep
The stability of whole base；Supporting leg（6.3）And guide rail（6.2）Lower end be hinged on bottom support frame（6.1）On, guide rail
（6.2）Upper installation propulsive mechanism support（6.6）, propulsive mechanism support（6.6）On a series of adjustment holes are distributed with along its length,
Pass through adjustment hole and guide rail（6.2）Connection, realizes propulsive mechanism support（6.6）The regulation for length of being stretched on guide rail；Supporting leg
（6.3）Upper end using adjusting screw and propulsive mechanism support（6.6）Adjustment hole connection, so as to adjust guide rail（6.2）Angle
Degree；Capstan winch（3）And propulsive mechanism（5）Pass through fixed plate respectively（6.4）It is separately fixed at the bottom support frame of base（9）And propulsion
Mechanism rack（6.6）On, position can adjust.
2. the hole flushing device of coal mine gas extraction borehole according to claim 1, it is characterised in that the self-advancing type
The front platform of drill bit (8)（8.1）Radius R2 is 10.5mm -4.0mm, side nozzle（8.3）Number be 3-4, side nozzle
A diameter of 0.5mm -1.0mm, the distribution radius R1 around front platform center is 1.0mm-10.0mm, the self-feeding bit
Side nozzle (8.3) have subtended angle α and drift angle β；Subtended angle α is between 15 ° -30 °, and drift angle β is between 60 ° -90 °；Side nozzle
Setting is：In front platform（8.1）On away from drill axis 1.0mm-10.0mm distance determine a little be side nozzle starting point, by side
The nozzle starting point and straight line parallel with drill axis is defined as straight line one, plane definition determined by straight line one and drill axis is
Plane one；It is baseline with straight line one, first to side jet exit direction to the direction deflection one away from drill axis in plane one
Determine angle, this angle initialization is subtended angle α；Side nozzle-axis is now defined as straight line two；Again by straight line two with side nozzle starting point
It is rotary shaft with straight line one for origin, rotates certain cone angle, the side nozzle-axis of gained is defined as straight line three, as side nozzle
Actual axis, the angle for now projecting straight line two and straight line three on self-feeding bit cross section is set as drift angle β；It is all
Side nozzle is all according to said method evenly arranged, and the angle and direction of deflection is consistent.
3. the hole flushing device of coal mine gas extraction borehole according to claim 1, it is characterised in that the self-advancing type
The middle part nozzle (8.4) in cross-section with deviation angle θ, the middle part spray are evenly distributed with the middle part of the bit body of drill bit (8)
Mouth（8.4）Number be 3-4, middle part nozzle diameter be 0.5mm-1.0mm, deviation angle θ is between 30 °-45 °, the deviation angle
θ refers to the angle of the axis and radial direction radius of middle part nozzle, and cross section referred to the axis of middle part nozzle and hung down with drill axis
Straight plane.
4. the hole flushing device of coal mine gas extraction borehole according to claim 1, it is characterised in that the self-advancing type
The posterior nozzle (8.5) in cone angle Φ with drill bit body axis, rear portion spray are evenly arranged on the bit body rear end side wall of drill bit (8)
Mouth（8.5）Number be 6-8, a diameter of 0.5mm-1.5mm of posterior nozzle, axial cone angle Φ is between 10 °-30 °, axle
Refer to the axis of posterior nozzle and the angle of drill axis to cone angle Φ.
5. the hole flushing device of coal mine gas extraction borehole according to claim 1, it is characterised in that：It is described from exciting
Swing nozzle（8.2）Successively by upstream nozzle（8.8）, the self-excited oscillation cavity（8.9）And downstream nozzle（8.10）Composition；The self-excited oscillation cavity
Length L is 2.3 ~ 3.3 times of upstream nozzle diameter d1, and downstream nozzle diameter d2 is 1.2 ~ 1.3 times of upstream nozzle diameter d1；From
Induced Oscillation chamber（8.9）Main body be cylindrical cavity, 18 times of its a diameter of upstream nozzle diameter d1；Above and below the vertical section of cavity is
Symmetrical parallelogram, cavity upstream and downstream nozzle impingement wall is taper surface, and upstream nozzle impact walls are convex to upstream, downstream spray
Mouth impact walls concave towards downstream.
6. the hole flushing device of coal mine gas extraction borehole according to claim 1, it is characterised in that the self-advancing type
Drill bit（8）Jet is divided into three parts：Preceding jet, middle jet and rear jet, preceding jet are broken to the rock for the part that blocks, collapses
It is broken, and the effect with certain reaming；Middle jet has centralizing function to drill bit, can effectively prevent drill bit from boring inclined；Jet afterwards
There is provided for the drilling of drill bit from entering power, and further reaming and deslagging.
7. the hole flushing device of coal mine gas extraction borehole according to claim 1, it is characterised in that the high pressure is hard
Pipe uses high-pressure resin pipe, and its internal diameter is about 2 times of high-pressure hose diameter, and inner wall smooth.
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| CN105525900B (en) * | 2015-09-11 | 2017-08-22 | 重庆大学 | The coal mine underground coal bed tree-shaped uniform anti-reflection equipment of drilling composite fracturing |
| CN105156085B (en) * | 2015-09-11 | 2018-02-02 | 重庆大学 | The coal mine underground coal bed tree-shaped uniform anti-reflection method of drilling composite fracturing |
| CN105134112B (en) * | 2015-09-11 | 2017-08-22 | 重庆大学 | The hole flushing method of coal mine gas extraction borehole |
| CN106285481B (en) * | 2016-10-17 | 2018-07-31 | 华北理工大学 | A kind of broken coal hole-punching method of automatic screw type high pressure water |
| CN106437520B (en) * | 2016-10-17 | 2018-07-31 | 华北理工大学 | A kind of broken coal hole punched device of automatic screw type high pressure water |
| CN106761495B (en) * | 2017-01-16 | 2023-01-17 | 济宁学院 | Hole washing device for coal mine gas extraction hole |
| CN111877985A (en) * | 2020-08-26 | 2020-11-03 | 沈阳煤炭科学研究所有限公司 | Continuous pipe type high-pressure guiding drilling device and method for coal mine |
| CN113944431A (en) * | 2021-12-20 | 2022-01-18 | 成都迪普金刚石钻头有限责任公司 | Hydraulic auxiliary rock breaking PDC drill bit and auxiliary rock breaking method |
| CN116411964B (en) * | 2023-05-26 | 2024-01-02 | 中国矿业大学 | Hydraulic fracturing cutting cooperative device suitable for hard rock and use method |
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