CN106194041A - A kind of mine high efficiency drilling rod - Google Patents
A kind of mine high efficiency drilling rod Download PDFInfo
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- CN106194041A CN106194041A CN201510304195.3A CN201510304195A CN106194041A CN 106194041 A CN106194041 A CN 106194041A CN 201510304195 A CN201510304195 A CN 201510304195A CN 106194041 A CN106194041 A CN 106194041A
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Abstract
The invention discloses a kind of mine high efficiency drilling rod, be provided with brill and cut head, connecting rod, dust suction bar, connecting rod one end connects brill and cuts head, and the other end connects dust suction bar.Multifunctional drill rod provided by the present invention is provided with high pressure spray discharge orifice, water cavity, air suction opening and turnover air cavity, it can not only realize boring the switching cutting function, can also be collected dust and gas executing brill, the drilling rod effectively solving frequently switching difference in functionality in drilling rod work progress causes inefficiency and executes the problem getting out existing gas exceeding limit and dust harzard simultaneously.
Description
Technical field
The invention belongs to technical field of coal exploitation, relate to coal and formally exploit setting during front pre-mash gas extraction passage construction
Standby, the brill particularly to pre-mash gas extraction passage cuts and effective collection of the gas of ejection, dust in boring in work progress.
Background technology
Coal mine gas, dust accident are one of disasters of down-hole, if there is gas, dust accident, not only can seriously break
Bad production environment, and can cause casualties, cause huge loss, therefore, elimination watt to the people, enterprise, country
This transfinites and dust is pre-gas prevention, the precondition of dust accident, is also one of the important leverage of mine safety production.So
And, due to geologic sedimentation effect, coal seam is overstock the toxic and harmfuls such as substantial amounts of gas, in order to realize safe digging,
Under normal circumstances, before digging, first have to arrange special gas pumping tunnel, use underground drill rig construction extraction borehole early excise
Gas pumping, after extraction is up to standard, can start digging coal.
The construction in gas pumping tunnel generally includes boring and isolates the multiple working procedures such as coal seam.Concrete grammar is to use underground drill rig
First execute the boring boring certain depth, need to cut in putting in boring after then changing drilling rod into drill rod special for isolating coal seam again
The position, coal seam split, then uses water under high pressure to isolate coal seam.Adopt effect to reach good gas pre-drainage, usually require that brill
Hole has certain degree of depth, and the different depth position holed needs to isolate coal seam, this be accomplished by repeatedly by drilling rod from boring
In exit and repeatedly change boring drilling rod and isolate the drill rod special in coal seam.When this drilling rod Renewal process can take substantial amounts of engineering
Between, affect project progress.Conventionally, as some duration of a project is nervous or other reasons, it would however also be possible to employ only
The form of construction work holed and do not cut, but it is the lowest to adopt its gas pumping rate of extraction tunnel arranged in this way.At present
The most not only can guarantee that the duration but also the extraction tunnel obvious method of effect can be made.
Meanwhile, during construction extraction borehole, after particularly many mines enter deep horizontal, coal seam gas-bearing capacity, pressure
Power, all by increase, is executed and is bored spray orifice, gas exceeding limit unsafe problems that even boring time delay spray orifice causes, and boring collapses hole problem also
More and more prominent, in order to overcome collapse hole and gas exceeding limit problem, it has to take to press wind row's powder construction technology, but dust is endangered
Evil has become again a new difficult problem.But, in the prior art, do not have at the special gas for these serious problems, dust
Reason equipment, therefore executes a large amount of gas, dust during brill and still can be released in tunnel, cause serious gas exceeding limit,
Dust exceeding potential safety hazard.
Summary of the invention
Cause inefficiency to solve in existing drilling rod work progress the drilling rod of frequently switching difference in functionality and execute and get out existing watt
This transfinites and the problem of dust harzard, and the present invention provides a kind of mine high efficiency drilling rod.
Technical solution of the present invention is as follows:
A kind of mine high efficiency drilling rod, is provided with brill and cuts head, connecting rod, dust suction bar, and connecting rod one end connects brill and cuts head, separately
One end connects dust suction bar.
Brill cuts head and includes that drill bit, drill bit shaft main body, drill bit water cavity, drill bit connect female, high pressure spray discharge orifice, water cavity sealing of hole plug
With change cord；Drill bit and drill bit connect female and are separately positioned on the two ends of drill bit shaft main body, and drill bit water cavity is arranged on drill bit shaft master
Drill bit shaft main body is also run through in the axial centre position of body, and its one end is conical through-hole, and high pressure spray discharge orifice is arranged on drill bit shaft main body
Going up and run through drill bit shaft main body, water cavity sealing of hole plug is arranged in water cavity, and its shape matches with the conical through-hole of drill bit water cavity,
Its section maximum gauge, less than the diameter of drill bit water cavity, changes cord and is connected and long enough with water cavity sealing of hole plug.
Connecting rod is provided with connecting rod water cavity bar wall, connecting rod air cavity bar wall, connecting rod water cavity, high pressure air cavity, connecting rod even
Connect male and connecting rod connects female；Connecting rod water cavity is at connecting rod water cavity bar pars intramuralis, and high pressure air cavity is at connecting rod water cavity bar
Between wall and connecting rod air cavity bar wall；Connecting rod connects male and connecting rod connects female and is separately positioned on the two ends of connecting rod,
Connecting rod connects female and includes being arranged at the connecting rod water cavity connection female of connecting rod water cavity bar wall one end and be arranged at connecting rod gas
Chamber bar wall connects female with the connecting rod air cavity of one end；Preferably, connecting rod water cavity bar wall is designed as tubular shape.
Dust suction bar be provided with dust suction bar water cavity bar wall, dust suction bar outlet chamber bar wall, dust suction bar inlet chamber bar wall, dust suction bar water cavity,
High pressure admission chamber, high pressure outlet air chamber, air suction opening, steady pin；Dust suction bar water cavity is at dust suction bar water cavity bar pars intramuralis, and height is pressed into
Air cavity is arranged between dust suction bar water cavity bar wall and inlet chamber bar wall, and high pressure outlet air chamber is arranged at inlet chamber bar wall and outlet chamber bar
Between wall；Dust suction bar water cavity bar wall two ends are provided with the dust suction bar water cavity bar wall being mutually matched and connect male and dust suction bar water cavity bar
Wall connects female, and dust suction bar outlet chamber bar wall two ends are provided with the dust suction bar outlet chamber bar wall being mutually matched and connect male and dust suction
Bar outlet chamber bar wall connects female, and dust suction bar inlet chamber bar wall two ends are provided with the dust suction bar inlet chamber bar wall being mutually matched and connect
Male and dust suction bar inlet chamber bar wall connect female；Air suction opening is arranged on dust suction bar outlet chamber bar wall, it is preferred that its axis
Direction is connected the acute angle that is wired to of male with itself and dust suction bar outlet chamber, and described sharp angle is 30 °；Steady pin is for fixing each
Bar wall, makes each bar wall fix relative to position；Preferably, dust suction bar water cavity bar wall is designed as tubular shape；Preferably, dust suction bar
Inlet chamber bar wall is designed as tubular shape.
Drill bit connection female is connected male with connecting rod and matches；Connecting rod water cavity connects female and is connected male with dust suction bar water cavity
Matching, connecting rod air cavity connection female is connected male with dust suction bar outlet chamber and matches.
Owing to using above technical scheme, Multifunctional drill rod provided by the present invention is provided with high pressure spray discharge orifice, water cavity, air suction opening
With turnover air cavity, it can not only realize boring the switching cutting function, can also be collected dust and gas executing brill simultaneously, have
The drilling rod solving in drilling rod work progress frequently switching difference in functionality of effect cause inefficiency and executing get out existing gas exceeding limit and
The problem of dust harzard.Its operation principle is: when in water cavity, hydraulic fluid keeps normal pressure, drilling rod is holed；To in water cavity
When hydraulic fluid applies high pressure, liquid goes out from high pressure spray discharge orifice high velocity spray and cuts coal seam；In boring or cutting coal seam
While, it being passed through gases at high pressure to high pressure admission chamber, gases at high pressure flow out from high pressure outlet air chamber, form circulation of air flow, dust
Suck this airflow circulating system with gas by air suction opening thus be excluded.
Accompanying drawing explanation
Fig. 1 is the generally longitudinally sectional view of the present invention；
Fig. 2 is the longitudinal sectional view boring and cutting head；
Fig. 3 is the A-A sectional view of Fig. 2；
Fig. 4 is the longitudinal sectional view of connecting rod；
Fig. 5 is the B-B sectional view of Fig. 4；
Fig. 6 is the longitudinal sectional view of dust suction bar；
Fig. 7 is the C-C sectional view of Fig. 6.
1, brill cuts head；1.1, drill bit；1.2, drill bit shaft main body；1.3, drill bit water cavity；1.4, drill bit connects female；1.5、
High pressure spray discharge orifice；1.6, water cavity sealing of hole plug；1.7 change cord；2, connecting rod；2.1, connecting rod water cavity bar wall；2.2, connect
Bar air cavity bar wall；2.3, connecting rod water cavity；2.4, high pressure air cavity；2.5, connecting rod connects male；2.6, connecting rod connects
Female；2.6.1 connecting rod water cavity connects female；2.6.2 connecting rod air cavity connects female；3, dust suction bar；3.1, dust suction bar water
Chamber bar wall；3.2, dust suction bar outlet chamber bar wall；3.12, dust suction bar inlet chamber bar wall；3.3, dust suction bar water cavity；3.4, high pressure
Inlet chamber；3.5, high pressure outlet air chamber；3.6, air suction opening；3.7, dust suction bar connects male；3.7.1, dust suction bar water cavity connects public affairs
Head；3.7.12, dust suction bar inlet chamber connects male；3.7.2, dust suction bar outlet chamber connects male；3.8, dust suction bar connects female；
3.8.1, dust suction bar water cavity connects female；3.8.12, dust suction bar inlet chamber connects female；3.8.2, dust suction bar outlet chamber connects mother
Head；4, steady pin.
Detailed description of the invention
The present invention is described further with specific embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of mine high efficiency drilling rod, it is provided with brill and cuts 1, connecting rod 2, dust suction bar 3, connecting rod 2
One end connects brill and cuts 1, and the other end connects dust suction bar 3.
Brill cuts 1 and includes that drill bit 1.1, drill bit shaft main body 1.2, drill bit water cavity 1.3, drill bit connect female 1.4, high-pressure jet
Hole 1.5, water cavity sealing of hole plug 1.6 and change cord 1.7；Drill bit 1.1 and drill bit connect female 1.4 and are separately positioned on drill bit shaft main body
The two ends of 1.2, drill bit water cavity 1.3 is arranged on the axial centre position of drill bit shaft main body 1.2 and runs through drill bit shaft main body 1.2, its
One end is conical through-hole, and high pressure spray discharge orifice 1.5 is arranged in drill bit shaft main body 1.2 and runs through drill bit shaft main body 1.2, and water cavity seals
Stopple 1.6 is arranged in water cavity, and its shape matches with the conical through-hole of drill bit water cavity 1.3, and its section maximum gauge is less than
The diameter of drill bit water cavity 1.3, changes cord 1.7 and is connected with water cavity sealing of hole plug 1.6.
In work progress, when needs vertical drilling, the hydraulic fluid in drill bit water cavity 1.3 keeps normal pressure, water cavity sealing of hole plug
The conical through-hole of drill bit water cavity 1.3 is not blocked by 1.6, and hydraulic fluid flows out from conical through-hole, and drilling rod carries out vertical drilling；When
When needing level to isolate coal seam, drilling rod stops boring, then the hydraulic fluid in water cavity is applied high pressure, water cavity sealing of hole plug 1.6
Being oppressed by highly pressurised liquid and blocked by the bellmouth of drill bit water cavity 1.3, hydraulic fluid sputters in high pressure spray discharge orifice 1.5, complete
Isolating of paired coal seam, factually border measuring and calculating, liquid pressure, when 8-10Pa, can reach expection cutting effect, i.e. by water
The regulation of intracavity hydraulic fluid pressure realizes boring and the switching isolating two kinds of mode of operations.Owing to water cavity sealing of hole plug 1.6 is frequent
Being oppressed by high pressure, its sealing effectiveness is easier to be damaged, and then makes cutting function not realize, now can be by changing cord
1.7 change water cavity sealing of hole plugs 1.6, it is to avoid whole drilling rod exits boring and changes water cavity sealing of hole plug 1.6 and delay the plenty of time,
Also improve work efficiency.
As shown in Figure 4, connecting rod 2 is provided with connecting rod water cavity bar wall 2.1, connecting rod air cavity bar wall 2.2, connecting rod water cavity
2.3, high pressure air cavity 2.4, connecting rod connect male 2.5 and connecting rod connection female 2.6；Connecting rod water cavity 2.3 is at connecting rod water
Chamber bar wall 2.1 is internal, and high pressure air cavity 2.4 is between connecting rod water cavity bar wall 2.1 and connecting rod air cavity bar wall 2.2；Connecting rod
Connecting male 2.5 and connecting rod connects female 2.6 and is separately positioned on the two ends of connecting rod 2, connecting rod connects female 2.6 and includes
The connecting rod water cavity being arranged at connecting rod water cavity bar wall 2.1 one end connects female 2.6.1 and is arranged at connecting rod air cavity bar wall 2.2
Female 2.6.2 is connected with the connecting rod air cavity of one end；Preferably, connecting rod water cavity bar wall 2.1 is designed as tubular shape, to reduce
Its air drag suffered when boring.
Connecting rod 2 is used for connecting brill and cuts 1 and dust suction bar 3, is connected female 1.4 company with drill bit when connecting rod connects male 2.5
After connecing, connecting rod water cavity 2.3 is through with drill bit water cavity 1.3, and connecting rod water cavity 2.3 is for the work carried by dust suction bar 3
Liquid flows to drill bit water cavity 1.3；Meanwhile, high pressure air cavity 2.4 is by the high pressure admission chamber 3.4 of dust suction bar 3 and high pressure outlet air chamber
3.5 connections, to form circulation of air flow.
As shown in Figure 6, dust suction bar 3 is provided with dust suction bar water cavity bar wall 3.1, dust suction bar outlet chamber bar wall 3.2, dust suction bar enter
Air cavity bar wall 3.12, dust suction bar water cavity 3.3, high pressure admission chamber 3.4, high pressure outlet air chamber 3.5, air suction opening 3.6, steady pin 4；
Dust suction bar water cavity 3.3 inside dust suction bar water cavity bar wall 3.1, high pressure admission chamber 3.4 be arranged at dust suction bar water cavity bar wall 3.1 with
Between inlet chamber bar wall 3.12, high pressure outlet air chamber 3.5 is arranged between inlet chamber bar wall 3.12 and outlet chamber bar wall 3.2；Inhale
Dirt bar water cavity bar wall 3.1 two ends are provided with the dust suction bar water cavity bar wall being mutually matched and connect male 3.7.1 and dust suction bar water cavity bar wall
Connecting female 3.8.1, dust suction bar outlet chamber bar wall 3.2 two ends are provided with the dust suction bar outlet chamber bar wall being mutually matched and connect male
3.7.2 connecting female 3.8.2 with dust suction bar outlet chamber bar wall, dust suction bar inlet chamber bar wall 3.12 two ends are provided with the suction being mutually matched
Dirt bar inlet chamber bar wall connects male 3.7.12 and dust suction bar inlet chamber bar wall connects female 3.8.12, owing to being arranged at dust suction bar 3
The connection male at two ends and corresponding connection female coupling, can control whole drilling rod by the quantity increasing dust suction bar 3
Length；Air suction opening 3.6 is arranged on dust suction bar outlet chamber bar wall 3.2, it is preferred that its axis direction and itself and dust suction bar are given vent to anger
Chamber connect male 3.7.2 be wired to acute angle, further, this acute angle is 30 degree, to strengthen its dust suction inspiratory effects；Gu
Rationed marketing 4 is used for fixing each bar wall, makes each bar wall fix relative to position；Preferably, dust suction bar water cavity bar wall 3.1 is designed as tubulose
Shape, dust suction bar inlet chamber bar wall 3.12 is designed as tubular shape, to reduce the air drag in its boring procedure.
After dust suction bar connection male 3.7 is connected female 2.6 connection with connecting rod, dust suction bar water cavity 3.3 and connecting rod water cavity 2.3
Connection, the hydraulic fluid in dust suction bar water cavity 3.3 is delivered to connecting rod water cavity 2.3；Meanwhile, high pressure admission chamber 3.4 and high pressure
Outlet chamber 3.5 is connected by high pressure air cavity 2.4, is passed through gases at high pressure from high pressure admission chamber 3.4, and gases at high pressure arrive high pressure gas
Behind chamber 2.4, returning from high pressure outlet air chamber 3.5, form circulation of air flow, owing to high velocity air air pressure is low, dust and gas pass through
Air suction opening 3.6 is adsorbed enters this circulation of air flow, thus is excluded.
Drill bit connection female 1.4 is connected male 2.5 and matches with connecting rod；Connecting rod water cavity connects female 2.6.1 and dust suction bar
Water cavity connects male 3.7.1 and matches, and connecting rod air cavity connects female 2.6.2 and is connected male 3.7.2 phase with dust suction bar outlet chamber
Join, bore and cut 1, connecting rod 2 and a dust suction bar 3 and connected two-by-two with being connected female by these connection males being mutually matched.
The operation principle of the present invention is: brill is cut after head is connected with dust suction bar by connecting rod, is designed at the water cavity within three's axle even
Logical, inlet chamber is connected by high pressure air cavity with outlet chamber.In whole work progress, high pressure admission chamber is passed through gases at high pressure,
After gases at high pressure arrive high pressure air cavity, return from high pressure outlet air chamber, form circulation of air flow, owing to high velocity air air pressure is low, powder
Dirt and gas enter this circulation of air flow by air suction opening is adsorbed, thus are excluded；And to holing and isolating two kinds of mode of operations
Switching then by the regulation of hydraulic fluid pressure in water cavity is realized: when needs vertical drilling, in drill bit water cavity 1.3
Hydraulic fluid keeps normal pressure, and now the bellmouth of drill bit water cavity 1.3 is not blocked by water cavity sealing of hole plug 1.6, and hydraulic fluid is from taper
Hole is flowed out, and drilling rod carries out vertical drilling；When needs level isolates coal seam, drilling rod stops boring, then to the work in water cavity
Making liquid and apply high pressure, water cavity sealing of hole plug 1.6 is oppressed by highly pressurised liquid and is blocked by the bellmouth of drill bit water cavity 1.3, working solution
Body sputters in high pressure spray discharge orifice 1.5, completes to isolate coal seam, factually border measuring and calculating, liquid pressure when 8-10Pa,
Expection cutting effect can be reached；Simultaneously as water cavity sealing of hole plug 1.6 is often subject to high pressure compressing, its sealing effectiveness is relatively vulnerable to
Damage, and then make cutting function not realize, now can change water cavity sealing of hole plug 1.6 by changing cord 1.7, it is to avoid by whole
Individual drilling rod exits boring and changes water cavity sealing of hole plug 1.6 and delay the plenty of time, also improves work efficiency.
Those of ordinary skill in the art is it will be appreciated that embodiment described here is to aid in the reader understanding present invention's
Principle, it should be understood that protection scope of the present invention is not limited to such special statement and embodiment.This area common
It is various specifically that technical staff can make various other without departing from essence of the present invention according to these technology disclosed by the invention enlightenment
Deformation and combination, these deformation and combination are the most within the scope of the present invention.
Claims (7)
1. a mine high efficiency drilling rod, it is characterised in that: it is provided with brill and cuts head (1), connecting rod (2), dust suction bar (3),
Described connecting rod (2) one end connects brill and cuts head (1), and the other end connects dust suction bar (3)；
Described brill cuts head (1) and includes that drill bit (1.1), drill bit shaft main body (1.2), drill bit water cavity (1.3), drill bit connect mother
Head (1.4), high pressure spray discharge orifice (1.5), water cavity sealing of hole plug (1.6) and change cord (1.7)；
Described drill bit (1.1) and drill bit connect female (1.4) and are separately positioned on the two ends of drill bit shaft main body (1.2), drill bit
Water cavity (1.3) is arranged on the axial centre position of drill bit shaft main body (1.2) and runs through drill bit shaft main body (1.2), its one end
For conical through-hole, high pressure spray discharge orifice (1.5) is arranged on drill bit shaft main body (1.2) and above and runs through drill bit shaft main body (1.2),
Water cavity sealing of hole plug (1.6) is arranged in water cavity, and its shape matches with the conical through-hole of drill bit water cavity (1.3), its cross section
Place's maximum gauge, less than the diameter of drill bit water cavity (1.3), changes cord (1.7) and is connected with water cavity sealing of hole plug (1.6)；
Described connecting rod (2) includes that connecting rod water cavity bar wall (2.1), connecting rod air cavity bar wall (2.2), connecting rod connect public affairs
Head (2.5) and connecting rod connect female (2.6)；
It is connecting rod water cavity (2.3) inside described connecting rod water cavity bar wall (2.1), connecting rod water cavity bar wall (2.1) and company
Being high pressure air cavity (2.4) between extension bar air cavity bar wall (2.2), connecting rod connects male (2.5) and connecting rod connects female
(2.6) being separately positioned on the two ends of connecting rod (2), connecting rod connects female (2.6) and includes being arranged at connecting rod water cavity bar
The connecting rod water cavity of wall (2.1) one end connects female (2.6.1) and is arranged at connecting rod air cavity bar wall (2.2) with one end
Connecting rod air cavity connects female (2.6.2)；
Described dust suction bar (3) includes dust suction bar water cavity bar wall (3.1), dust suction bar outlet chamber bar wall (3.2), dust suction bar air inlet
Chamber bar wall (3.12), air suction opening (3.6) and steady pin (4)；
Described dust suction bar water cavity bar wall (3.1) is internal for dust suction bar water cavity (3.3), dust suction bar water cavity bar wall (3.1) with enter
Be high pressure admission chamber (3.4) between air cavity bar wall (3.12), inlet chamber bar wall (3.12) and outlet chamber bar wall (3.2) it
Between be high pressure outlet air chamber (3.5), described dust suction bar water cavity bar wall (3.1) two ends are provided with the dust suction bar water cavity bar being mutually matched
Wall connects male (3.7.1) and dust suction bar water cavity bar wall connects female (3.8.1), described dust suction bar outlet chamber bar wall (3.2)
Two ends are provided with the dust suction bar outlet chamber bar wall being mutually matched and connect male (3.7.2) and dust suction bar outlet chamber bar wall connection female
(3.8.2), described dust suction bar inlet chamber bar wall (3.12) two ends are provided with the dust suction bar inlet chamber bar wall connection being mutually matched
Male (3.7.12) and dust suction bar inlet chamber bar wall connect female (3.8.12), and air suction opening (3.6) is arranged on dust suction bar and goes out
On air cavity bar wall (3.2), steady pin (4) is arranged between each bar wall, is used for fixing each bar wall, makes each bar wall relative to position
Fixing；
Described drill bit connection female (1.4) is connected male (2.5) and matches with described connecting rod；Described connecting rod water cavity connects
Female (2.6.1) is connected male (3.7.1) with described dust suction bar water cavity and matches, and described connecting rod air cavity connects female (2.6.2)
It is connected male (3.7.2) with described dust suction bar outlet chamber to match.
A kind of mine high efficiency drilling rod the most according to claim 1, it is characterised in that: described high pressure spray discharge orifice (1.5)
For the inside trumpet degree of lip-rounding.
A kind of mine high efficiency drilling rod the most according to claim 1, it is characterised in that: described air suction opening (3.6) tilts
Being arranged in dust suction bar outlet chamber bar wall (3.2), its axis direction is connected male (3.7.2) with itself and dust suction bar outlet chamber
Be wired to acute angle.
A kind of mine high efficiency drilling rod the most according to claim 3, it is characterised in that: described sharp angle is 30 °.
A kind of mine high efficiency drilling rod the most according to claim 1, it is characterised in that: described connecting rod water cavity bar wall (2.1)
It is designed as tubular shape.
A kind of mine high efficiency drilling rod the most according to claim 1, it is characterised in that: described dust suction bar water cavity bar wall (3.1)
It is designed as tubular shape.
A kind of mine high efficiency drilling rod the most according to claim 1, it is characterised in that: described dust suction bar inlet chamber bar wall
(3.12) it is designed as tubular shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720836 | 2014-12-02 | ||
| CN2014107208369 | 2014-12-02 |
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| CN106194041A true CN106194041A (en) | 2016-12-07 |
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| CN201510304195.3A Withdrawn CN106194041A (en) | 2014-12-02 | 2015-06-04 | A kind of mine high efficiency drilling rod |
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| CN203441366U (en) * | 2013-07-02 | 2014-02-19 | 中煤科工集团西安研究院 | Double-pipe fast connection and dust collection device for air sleeve pipe drilling |
| CN203463049U (en) * | 2013-09-18 | 2014-03-05 | 湖南科技大学 | Dust-settling device for wind deslagging drilling in underground coal mine |
| CN103643899A (en) * | 2013-11-05 | 2014-03-19 | 成都晟鑫机电设备有限公司 | Integrated drilling-cutting drill rod device |
| CN203716841U (en) * | 2013-11-13 | 2014-07-16 | 河南理工大学 | Double-layer internal slag discharging and plugging prevention drilling tool for soft outburst coal seam drilling |
| CN103556940A (en) * | 2013-11-15 | 2014-02-05 | 河南理工大学 | Dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and construction method of drilling tool |
| CN203584298U (en) * | 2013-11-15 | 2014-05-07 | 河南理工大学 | Soft coal rock drilling dual-channel porous turbulent pressure relief drill |
| CN204851080U (en) * | 2015-06-04 | 2015-12-09 | 成都宸鸿科技有限公司 | Mine high efficiency drilling rod |
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Application publication date: 20161207 |