CN202937203U - Extraction dust removal device of mine drilling machine - Google Patents

Extraction dust removal device of mine drilling machine Download PDF

Info

Publication number
CN202937203U
CN202937203U CN 201220677993 CN201220677993U CN202937203U CN 202937203 U CN202937203 U CN 202937203U CN 201220677993 CN201220677993 CN 201220677993 CN 201220677993 U CN201220677993 U CN 201220677993U CN 202937203 U CN202937203 U CN 202937203U
Authority
CN
China
Prior art keywords
dust
cylinder
bearing
extraction
drilling machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220677993
Other languages
Chinese (zh)
Inventor
覃乐
许刚
张鹏伟
隆念
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING SONGZAO C&E Co Ltd
Original Assignee
CHONGQING SONGZAO C&E Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHONGQING SONGZAO C&E Co Ltd filed Critical CHONGQING SONGZAO C&E Co Ltd
Priority to CN 201220677993 priority Critical patent/CN202937203U/en
Application granted granted Critical
Publication of CN202937203U publication Critical patent/CN202937203U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses an extraction dust removable device of a mine drilling machine. The extraction dust removable device of the mine drilling machine comprises a dust collecting barrel, a horn-mouth sleeve is arranged at one end of the dust collecting barrel, a bearing installation seat is arranged at the other end of the dust collecting barrel, a beating is arranged in the bearing installation seat, and a rotating head is matched with the bearing installation seat through the bearing. A bearing limit end cover is arranged on the end portion of the bearing installation seat, an outer barrel is sleeved on the dust collecting barrel, a fixed support is arranged on the middle segment of the dust collecting barrel, a connecting support lug is arranged on one end, opposite to the fixed support, of the outer barrel, the outer barrel and the fixed support are locked through a bolt, a seal rubber sleeve is arranged between the outer barrel and the dust collecting barrel, one end of the seal rubber sleeve extends to cover the horn-mouth sleeve, the upper portion of the dust collecting barrel is provided with a water inlet used for connecting a water inlet pipe, and the lower portion of the dust collecting barrel is provided with a slag discharge hole used for connecting a slag discharge pipe. The extraction dust removable device can eliminate dust generated in a construction drilling process, the working environment of a construction site is improved, and producing security is guaranteed.

Description

The extraction device for reducing dust of mine drilling machine
Technical field
The utility model relates to a kind of device for reducing dust, particularly a kind of extraction device for reducing dust of mine drilling machine.
Background technology
The gas that draws out methane before coal mining and in exploitation is the important measures that guarantee safety of coal mines.Particularly when coal and gas outburst mine, gas pumping work is the major tasks of mine production especially.In order to administer gas, mine is generally adhered to wearing layer extraction and is combined with this drainage from coal seam, adopts front extraction and adopts while taking out, and the brill extraction must be executed in every coal seam that should extraction, reduces seam gas content.And in this coal bed drilling of construction process, owing to adopting the wind row powder mode of pressing, underworkings all needs air hundreds thousand of and even millions of cubic metres each second, they are mainly to complete by mine ventilation, when adopting pressure wind row powder construction drill, mine ventilation contains a large amount of dust, the dust that discharge in the aperture spreads in the tunnel, visibility in the tunnel reduces, pollute underground air, make construction environment abominable, particularly when the same tunnel had two bench drill machines to construct simultaneously, the brill personnel that execute of that bench drill machine of return side were subjected to the impact of dust more serious.Have a strong impact on the healthy of staff, also easily caused the generation of occupational disease.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and a kind of extraction device for reducing dust of mine drilling machine is provided.The utility model can be eliminated the dust that produces in the construction drill process, improve the operating environment of job site, guarantees safety in production.
The purpose of this utility model is achieved in that
a kind of extraction device for reducing dust of mine drilling machine, comprise that a dust catches cylinder, the threaded one end that described dust catches cylinder connects a loudspeaker muzzle, the other end that dust catches cylinder is provided with a bearing mounting base, in this bearing mounting base, bearing is installed, a swivel head rotatably coordinates with bearing mounting base by bearing, the end of described bearing mounting base is provided with the spacing end cap of bearing, described dust catches the upper cover of cylinder has one can catch the axially movable urceolus of cylinder along dust, the stage casing that described dust catches cylinder is provided with fixed support, the end that urceolus is relative with fixed support is provided with the connection journal stirrup, urceolus and fixed support pass through locked with bolts, described urceolus and dust catch between cylinder and are provided with seal rubber sleeve, the sealing gum cover is fixedly connected in urceolus, one end extension of seal rubber sleeve is covered horn mouth and is put, the top that dust catches cylinder is provided with for the inlet opening that connects water inlet pipe, dust catches a bottom and is provided with for the mud hole that connects scum pipe.
Described loudspeaker muzzle comprises cylindrical section and cone section, and the loudspeaker muzzle catches the cylinder threaded engagement by internal thread and the dust that cylindrical section is provided with.
Described seal rubber sleeve covers the side face of whole loudspeaker muzzle, and perhaps seal rubber sleeve covers the part of loudspeaker muzzle cone section.
The internal diameter of described urceolus is less than the large end external diameter of loudspeaker muzzle, and catches the external diameter of cylinder greater than dust.
Described swivel head comprises rotary cylinder and pressure ring, and this pressure ring is fixedly connected on the end of rotary cylinder.
The outer peripheral face of described rotary cylinder is stepped, and the miner diameter end of rotary cylinder is provided with draw-in groove, is provided with clamp in this draw-in groove, and the distance of draw-in groove and the shaft shoulder equals the width of bearing; The endoporus of rotary cylinder is shoulder hole, and the middle part of rotary cylinder endoporus is provided with positive stop lug boss.
The end face of described pressure ring is provided with positioning spigot, and the positioning spigot of pressure ring embeds rotary cylinder, and the axle center of pressure ring is provided with the through hole that axially runs through pressure ring.
Be provided with sealing ring between the miner diameter end of described rotary cylinder and bearing mounting base.
The end face of the spacing end cap of described bearing is provided with position limiting convex ring, and this position limiting convex ring embeds bearing mounting base and contacts with bearing, and the axle center of the spacing end cap of bearing is provided with the axially extending bore that coordinates rotary cylinder, is provided with sealing ring between the spacing end cap of bearing and rotary cylinder.
Described dust catches cylinder and is connected with the grain slag separator box by scum pipe.
Owing to having adopted such scheme, the urceolus of this device for reducing dust is fixed on the position, aperture of construction drill, lock the bolt of urceolus and dust seizure cylinder by adjusting, making dust catch tin the loudspeaker muzzle and the urceolus that are provided with moves in opposite directions, thereby make urceolus and dust catch the seal rubber sleeve expanded radially between cylinder and seal up urceolus and catch tin with dust between the space, prevented that dust from overflowing from the gap.Dust catches a swivel head that is provided with and is used for installing and sealing drilling rod, thereby makes dust not catch the cylinder effusion from dust.The top of dust seizure cylinder connects water inlet pipe, and dust catches cylinder bottom connection scum pipe, and in boring procedure, the water smoke of water inlet pipe ejection can be combined with the dust that boring produces and be formed the grain slag mixture, and grain slag mixture process scum pipe is discharged.
The dust of this device for reducing dust catches cylinder and is connected with the grain slag separator box by scum pipe, after water and mix dust in the grain slag separator box precipitate and separate.Water in this device for reducing dust can recycle, and has saved water resource and has reduced cost.
owing to the utlity model has swivel head and Seal Design, therefore the utility model can be totally-enclosed with the space between holing with drilling rod in the construction drill process, decrease is executed the dust concentration of boring in the outgoing airflow of place, a dustfall water that enters in dust seizure cylinder all enters gas slag separator box from scum pipe, executing the dust and the dustfall water that bore generation all is closed in the grain slag separator box, can not gush out along drilling rod, create a good operating environment to the operating personnel, increase the visual range in the tunnel, thereby reduced the generation of occupational disease, guaranteed safety in production.Particularly when the same tunnel had two bench drill machines to construct simultaneously, the utility model more made the impact that the brill personnel no longer suffer dust of executing that is in that bench drill machine of return side, and effect is more obvious.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the present utility model;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1;
Fig. 3 is the structural representation of rotary cylinder in Fig. 1;
Fig. 4 is the structural representation of a kind of embodiment of the present utility model.
In accompanying drawing, 1 for dust catches cylinder, and 2 is the loudspeaker muzzle, and 3 is bearing mounting base, and 4 is bearing, 5 is swivel head, and 6 is the spacing end cap of bearing, and 7 is urceolus, and 8 is fixed support, 9 for connecting journal stirrup, and 10 is seal rubber sleeve, and 11 is the inlet opening, and 12 is mud hole, 13 is rotary cylinder, and 14 is pressure ring, and 15 is draw-in groove, and 16 is clamp, 17 is positive stop lug boss, and 18 is positioning spigot, and 19 is position limiting convex ring, and 20 is scum pipe, 21 is the grain slag separator box, and 22 is bolt, and 23 is cushion rubber.
The specific embodiment:
Referring to Fig. 1~Fig. 4, a kind of embodiment for the extraction device for reducing dust of mine drilling machine, this device for reducing dust comprises that a dust catches cylinder 1, the stack shell that this dust catches cylinder 1 is cylindric, the threaded one end that described dust catches cylinder 1 connects a loudspeaker muzzle 2, and dust seizure cylinder 1 and loudspeaker muzzle 2 are threaded and can conveniently pull down and change the loudspeaker muzzle.Described loudspeaker muzzle 2 comprises cylindrical section and cone section, and loudspeaker muzzle 2 catches cylinder 1 threaded engagement by internal thread and the dust that cylindrical section is provided with.The other end that dust catches cylinder 1 is provided with a bearing mounting base 3, the connected mode that dust catches cylinder 1 and bearing mounting base 3 can be integrated casting, be threaded and be connected with key, catch the bonding strength of cylinder 1 and bearing mounting base 3 and prevent bearing mounting base 3 axial rotation in order to increase dust, in the present embodiment, dust catches cylinder 1 and bearing mounting base 3 integrally casting moulding.In this bearing mounting base 3, bearing 4 is installed, a swivel head 5 rotatably coordinates with bearing mounting base 3 by bearing 4, the quantity of described bearing 4 can be one or more, when the quantity of bearing 4 when being a plurality of, a plurality of bearings 4 are positioned on same axial line, because the radial load that bearing 4 bears is little, therefore the present embodiment is selected a bearing 4.
Described swivel head 5 comprises rotary cylinder 13 and pressure ring 14, and this pressure ring 14 is fixedly connected on the end of rotary cylinder 13, and the connected mode that rotary cylinder 13 is connected with pressure ring is that bolt connects.The outer peripheral face of described rotary cylinder 13 is stepped, the miner diameter end of rotary cylinder 13 is provided with draw-in groove 15, described draw-in groove 15 is annular slot, be provided with clamp 16 in this draw-in groove 15, the distance of draw-in groove 15 and the shaft shoulder equals the width of bearing 4, when installing bearing 4, it is interior to bearing 4 axial limitings that clamp 16 embeds draw-in groove 15.Be provided with sealing ring between the miner diameter end of described rotary cylinder 13 and bearing mounting base 3, the sealing circle can prevent that dust from catching the dust effusion in cylinder 1.The endoporus of rotary cylinder 13 is shoulder hole, and the middle part of rotary cylinder 13 endoporus is provided with positive stop lug boss 17, and the shoulder hole of rotary cylinder 13 external parts is installed the drilling rod of punching rig, and positive stop lug boss 17 contacts drilling rod spacing with drilling rod; The other end of rotary cylinder 13 embeds bearing mounting base 3.The end face of described pressure ring 14 is provided with positioning spigot 18, and this positioning spigot 18 is the ring-type seam, and the positioning spigot 18 of pressure ring 14 embeds rotary cylinder 13, and the axle center of pressure ring 14 is provided with the through hole that axially runs through pressure ring 14, and this through hole is used for installing drilling rod.Be provided with cushion rubber 23 between pressure ring 14 and positive stop lug boss 17, this cushion rubber 23 contact with drilling rod with rotary cylinder 13 simultaneously, and the effect by pressure ring 14 makes cushion rubber 23 along expanded radially, makes between cushion rubber 23 and drilling rod to seal, and prevents the effusion of dust and boring mud.The end of described bearing mounting base 3 is provided with the spacing end cap 6 of bearing, and the end face of the spacing end cap 6 of described bearing is provided with position limiting convex ring 19, and this position limiting convex ring 19 embeds bearing mounting base 3 and contacts with bearing 4, to bearing 4 axial limitings.The axle center of the spacing end cap 6 of bearing is provided with the axially extending bore that coordinates rotary cylinder 13, be provided with sealing ring between the spacing end cap 6 of bearing and rotary cylinder 13, the sealing circle can prevent that dust from catching the raceway that the outer dust of cylinder 1 is invaded rolling element, guarantees that sliding agent only works to rolling element and raceway and do not overflow and can also prevent to a certain extent that bearing 4 is subjected to External Force Acting and damages.
Described dust catches to overlap on cylinder 1 has one can catch cylinder 1 an axially movable urceolus 7 along dust, and described urceolus 7 is positioned at the end that dust catches cylinder 1 installation loudspeaker muzzle 2, and this dust catches between cylinder 1 and urceolus 7 and leaves certain gap.The stage casing that described dust catches cylinder 1 is provided with fixed support 8, be fixedly connected with the bolt 22 of two symmetries on this fixed support 8, the end that urceolus 7 is relative with fixed support 8 is provided with and connects journal stirrup 9, the quantity of described connection journal stirrup 9 is two, be respectively equipped with the through hole that passes for bolt 22 on two journal stirrups, by bolt 22 lockings, described bolt 22 is the bolt with double nut to urceolus 7 with fixed support 8.Described urceolus 7 and dust catch between cylinder 1 and are provided with seal rubber sleeve 10, described seal rubber sleeve 10 is the seal rubber sleeve 10 of elastomeric material, sealing gum cover 10 is fixedly connected in urceolus 7, one end extension of seal rubber sleeve 10 is covered on loudspeaker muzzle 2, described seal rubber sleeve 10 covers the side face of whole loudspeaker muzzle 2, perhaps seal rubber sleeve 10 covers the part of loudspeaker muzzle 2 cone sections, and seal rubber sleeve 10 is bolted to connection on the endoporus of urceolus 7.The internal diameter of described urceolus 7 is less than the large end external diameter of loudspeaker muzzle 2, and catches the external diameter of cylinder 1 greater than dust, and when loudspeaker muzzle 2 was moved to urceolus, the cone section of loudspeaker muzzle 2 can make seal rubber sleeve 10 contact with the hole wall of construction drill along 2 expanded radiallys of loudspeaker muzzle.
The top that dust catches cylinder 1 is provided with for the inlet opening 11 that connects water inlet pipe, and dust catches 1 bottom and is provided with for the mud hole 12 that connects scum pipe 20, and up and down, the position of inlet opening 11 and mud hole 12 is corresponding, and the aperture of mud hole 12 is greater than inlet opening 11.In rig when work,, dust catches cylinder 1 and is connected with scum pipe with water inlet pipe respectively and is connected, the path of formation water mist dust fall.Described dust catches cylinder 1 and is connected with grain slag separator box 21 by scum pipe 20, and described grain slag separator box 21 is settling tank, after water and mix dust in the interior precipitation of grain slag separator box 21.Grain slag separator box 21 is provided with the dewatering outlet, and the water in this device for reducing dust can recycle.
Before the work of this device for reducing dust, at first urceolus being installed to dust catches on cylinder, then dust is caught the position, aperture that cylinder and urceolus are sent into construction drill together, when urceolus all enters in the hole, catch the bolt of cylinder by unscrewing locking urceolus and dust, loudspeaker muzzle and urceolus are moved in opposite directions, seal rubber sleeve outwards expands along the loudspeaker muzzle, thereby seal up the space between urceolus and construction drill, and then fix this device for reducing dust.The drilling rod that drill bit is installed is inserted in the swivel head of this device for reducing dust, the swivel head of drilling rod and this device for reducing dust adopts sealing ring to seal, and prevents that dust from overflowing, simultaneously good rotary cylinder with bolts and pressure ring; Dust catches cylinder to be connected with mud hole with water inlet pipe by water inlet and to be connected with scum pipe, and scum pipe is connected with the grain slag separator box, the path of formation water mist dust fall.Jointed rod, rig and hydraulic drive rig power head are opened the water source, and water inlet pipe ejection water smoke is executed driller's work.Execute the dust that produces in the brill process and press the dust that produces in wind row powder process and water smoke is combined into the grain slag mixture and enters mud hole, then enter grain slag separator box precipitate and separate.
The utility model not only is confined to above-described embodiment, and dust catches cylinder also can directly discharge the grain slag mixture by scum pipe, has reduced the space that this device for reducing dust takies.
The utility model not only is confined to above-described embodiment, in the situation that do not deviate from the technical scheme that the technical solutions of the utility model spirit is carried out a little change, should fall into protection domain of the present utility model.

Claims (10)

1. the extraction device for reducing dust of a mine drilling machine, it is characterized in that: comprise that a dust catches cylinder, the threaded one end that described dust catches cylinder connects a loudspeaker muzzle, the other end that dust catches cylinder is provided with a bearing mounting base, in this bearing mounting base, bearing is installed, a swivel head rotatably coordinates with bearing mounting base by bearing, the end of described bearing mounting base is provided with the spacing end cap of bearing, described dust catches the upper cover of cylinder has one can catch the axially movable urceolus of cylinder along dust, the stage casing that described dust catches cylinder is provided with fixed support, the end that urceolus is relative with fixed support is provided with the connection journal stirrup, urceolus and fixed support pass through locked with bolts, described urceolus and dust catch between cylinder and are provided with seal rubber sleeve, the sealing gum cover is fixedly connected in urceolus, one end extension of seal rubber sleeve is covered horn mouth and is put, the top that dust catches cylinder is provided with for the inlet opening that connects water inlet pipe, dust catches a bottom and is provided with for the mud hole that connects scum pipe.
2. the extraction device for reducing dust of mine drilling machine according to claim 1 is characterized in that: described loudspeaker muzzle comprises cylindrical section and cone section, and the loudspeaker muzzle catches a threaded engagement by the internal thread that cylindrical section is provided with dust.
3. the extraction device for reducing dust of mine drilling machine according to claim 1, is characterized in that: the side face of the whole loudspeaker muzzle of described seal rubber sleeve covering, the perhaps part of seal rubber sleeve covering loudspeaker muzzle cone section.
4. the extraction device for reducing dust of mine drilling machine according to claim 1 is characterized in that: the internal diameter of described urceolus is less than the large end external diameter of loudspeaker muzzle, and catches the external diameter of cylinder greater than dust.
5. the extraction device for reducing dust of mine drilling machine according to claim 1, it is characterized in that: described swivel head comprises rotary cylinder and pressure ring, this pressure ring is fixedly connected on the end of rotary cylinder.
6. the extraction device for reducing dust of mine drilling machine according to claim 5, it is characterized in that: the outer peripheral face of described rotary cylinder is stepped, and the miner diameter end of rotary cylinder is provided with draw-in groove, is provided with clamp in this draw-in groove, the distance of draw-in groove and the shaft shoulder equals the width of bearing; The endoporus of rotary cylinder is shoulder hole, and the middle part of rotary cylinder endoporus is provided with positive stop lug boss.
7. the extraction device for reducing dust of mine drilling machine according to claim 5, it is characterized in that: the end face of described pressure ring is provided with positioning spigot, and the positioning spigot of pressure ring embeds rotary cylinder, and the axle center of pressure ring is provided with the through hole that axially runs through pressure ring.
According to claim 5 to 7 arbitrary described mine drilling machine the extraction device for reducing dust, it is characterized in that: be provided with sealing ring between the miner diameter end of described rotary cylinder and bearing mounting base.
9. the extraction device for reducing dust of mine drilling machine according to claim 1, it is characterized in that: the end face of the spacing end cap of described bearing is provided with position limiting convex ring, this position limiting convex ring embeds bearing mounting base and contacts with bearing, the axle center of the spacing end cap of bearing is provided with the axially extending bore that coordinates rotary cylinder, is provided with sealing ring between the spacing end cap of bearing and rotary cylinder.
10. the extraction device for reducing dust of mine drilling machine according to claim 1 is characterized in that: described dust catches cylinder and is connected with the grain slag separator box by scum pipe.
CN 201220677993 2012-12-11 2012-12-11 Extraction dust removal device of mine drilling machine Expired - Fee Related CN202937203U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220677993 CN202937203U (en) 2012-12-11 2012-12-11 Extraction dust removal device of mine drilling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220677993 CN202937203U (en) 2012-12-11 2012-12-11 Extraction dust removal device of mine drilling machine

Publications (1)

Publication Number Publication Date
CN202937203U true CN202937203U (en) 2013-05-15

Family

ID=48321447

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220677993 Expired - Fee Related CN202937203U (en) 2012-12-11 2012-12-11 Extraction dust removal device of mine drilling machine

Country Status (1)

Country Link
CN (1) CN202937203U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966320A (en) * 2012-12-11 2013-03-13 重庆松藻煤电有限责任公司 Extraction dust settling device of mine drilling machine
CN103306605A (en) * 2013-07-02 2013-09-18 中煤科工集团西安研究院 Double-pipe fast connecting and dust collecting device for drilling of air casting pipe and applications of double-pipe fast connecting and dust collecting device
CN104196472A (en) * 2014-08-27 2014-12-10 敦煌研究院 Dust prevention device special for earthen archaeological site drilling machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966320A (en) * 2012-12-11 2013-03-13 重庆松藻煤电有限责任公司 Extraction dust settling device of mine drilling machine
CN103306605A (en) * 2013-07-02 2013-09-18 中煤科工集团西安研究院 Double-pipe fast connecting and dust collecting device for drilling of air casting pipe and applications of double-pipe fast connecting and dust collecting device
CN103306605B (en) * 2013-07-02 2015-08-12 中煤科工集团西安研究院有限公司 A kind of casing air creeps into and to connect and dust collect plant and application fast with two-tube
CN104196472A (en) * 2014-08-27 2014-12-10 敦煌研究院 Dust prevention device special for earthen archaeological site drilling machine

Similar Documents

Publication Publication Date Title
CN202937203U (en) Extraction dust removal device of mine drilling machine
CN205663410U (en) Hydrodrill with drill way blowout preventer
CN203499569U (en) Water-pressure-controlled drilling and blanking integrated efficient drill bit
CN201050381Y (en) Spurting-proof device for safe tunneling of protrusive coal bed
CN206707754U (en) A kind of coal mine drilling water filling slag-draining device
CN105156060A (en) Coiled tubing well sealing device
CN102966320A (en) Extraction dust settling device of mine drilling machine
CN204591337U (en) A kind of coal road dry drilling aperture dust collect plant
CN204004401U (en) Rig wireline pulley sealing configuration
CN102828707B (en) The dust-proof slag-draining device of anchoring drilling machine
CN207795249U (en) A kind of coal petrography cutting operating mechanism
CN204827248U (en) Dual -purpose split type double jet drill bit that punches a hole creeps into
CN104555153B (en) Turn round direct acting arch breaking apparatus
CN203638446U (en) Hydraulic arch breaker
CN104818948A (en) Port piling drill bit
CN202937263U (en) Internal spraying device of drum-type coal winning machine
CN201908659U (en) Dustproof structure of cutting part of heading machine
CN204782828U (en) Heavily loaded tap of high pressure
CN204591144U (en) A kind of harbour piling drill bit
CN204419085U (en) The board-like dust arrester in coal road dry drilling aperture
CN204984333U (en) Coiled tubing blowout preventer
CN104722373B (en) A kind of main axle structure on vertical shaft impact crusher
CN204252854U (en) Water filling drill rod connector
CN201372732Y (en) Drill bit
CN201027507Y (en) Wet-type drilling can filler of electric coal drill

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130515

Termination date: 20161211