CN205823155U - A kind of coal bed drilling burrowing device of quick penetration gangue - Google Patents
A kind of coal bed drilling burrowing device of quick penetration gangue Download PDFInfo
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- CN205823155U CN205823155U CN201620708578.7U CN201620708578U CN205823155U CN 205823155 U CN205823155 U CN 205823155U CN 201620708578 U CN201620708578 U CN 201620708578U CN 205823155 U CN205823155 U CN 205823155U
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Abstract
This utility model relates to the coal bed drilling burrowing device of a kind of quick penetration gangue, this device is during drilling in coal, if running into gangue, the mode of creeping into can be switched fast, original high speed rotating creep into and be converted to middle low speed rotation and creep into the drill mode combined with percussion drilling；The rock breaking capacity of rig is effectively promoted, it is possible to resolve conventional drilling machine meets the technical barrier that spoil cannot continue to creep into.
Description
Technical field
This utility model relates to a kind of coal bed drilling and drills technology, the coal bed drilling of a kind of quick penetration gangue
Burrowing device.
Background technology
It is known that at underground coal mine, no matter be to measure coal-bed gas pressure and gas flow quantity from boreholes in coal seam, or gas
Extraction or discharge, be required for coal seam construction drill.
Compared with large type drill, electric coal drill and the small volume of air drill, it is simple to carry, use also the most flexibly；But
It is to there is also deficiency, that is, power is inadequate, and the degree of depth of drilling is limited, when particularly running into spoil in drilling process, it is impossible to continue
Continue and creep into forward, cause drilling unsuccessfully.
In terms of the technique drilled at coal bed drilling and device research and development, disclosed achievement in research is concentrated mainly on large-scale high-power
The aspect such as the research and development of rig, the improvement of soft drill of protrusive coal seam drilling tool and the Slagoff method during drilling；And for coal electricity
Bore and air drill runs into this problem of gangue in drilling process, there is no solution concrete, effective at present.
Electric coal drill and air drill are the coal seam burrowing devices that underground coal mine is conventional, and association more or less in most coal seam
With the presence of spoil；Therefore, in order to provide the device of a kind of quick penetration gangue to coal mining enterprise, a kind of quick penetration is explored
The coal bed drilling of gangue technique of drilling just seems the most urgent with device.
Utility model content
In order to solve above-mentioned technical problem, this utility model provides the coal bed drilling of a kind of quick penetration gangue and drills
Device.
This utility model solves the coal that be the technical scheme is that a kind of quick penetration gangue of above-mentioned technical problem
Layer boring burrowing device, including rotary drilling-head, drill hammer, twist drill rods, gear coal brush, spring, Pressure gauge and high pressure positive blower；
It is characterized in that, described drilling rod center is provided with axial ducts, and one end of drilling rod is solidly connected rotary drilling-head, and in drilling rod end face axial
Offer the step embedding slot that outer imperial palace is little, bottom land connection air channel；Being provided with drill hammer and gear coal brush in embedding slot, gear brush leans on
Nearly notch is arranged, and drill hammer rear end has been linked in sequence sealing block and spring, the other end of spring and the axle installed close to bottom land
Holding connection, air channel air-flow is played sealing function by sealing block；The other end of described drilling rod is connected with high pressure positive blower, described high-pressure blast
Machine includes adapter, impeller, connecting rod, bearing, spring, bearing block, housing, air inlet and air outlet；Described housing is rectangular
Shape, wherein a side-wall hole be provided with bearing, its opposing sidewalls is provided with the centrage position of elastic shaft bearing, bearing and bearing block
On same level line, the another pair of sidewalls of housing is symmetrical arranged air inlet and air outlet；Axial wind it is provided with in described adapter
Road, its sidewall is provided with the air inlet in vertical connection air channel；Adapter is connected with housing into rotation by bearing and bearing block, adapter
One end is connected through housing with drilling rod, and the air channel of drilling rod and adapter communicates and seals, and the adapter other end is positioned at housing also
Connect and have rotary blade；It is also equipped with Pressure gauge on described drilling rod；Under normal drill state, air inlet is positioned at hull outside, punching
Hit drill bit and be positioned at embedding slot bottom land, the compressed gas in high pressure positive blower be completely used for promote impeller rotate, impeller drive drilling rod and
Rotary drilling-head high-speed rotation is holed；When boring front has spoil, boring resistance to increase, and the spring of elastic shaft bearing is significantly pressed
Contracting, air inlet on adapter enters in high pressure positive blower housing, and Partial shrinkage gas enters drilling rod air channel, promote drill hammer to
Front motion, reduces the compressed gas promotion ability to impeller simultaneously, and the rotating speed of rotary drilling-head reduces, it is to avoid rotary drilling-head is excessive
Abrasion.
Described elastic shaft bearing is formed by connecting by spring and bearing.
Described drilling rod is saved main drilling rod and more piece by one and extends that drilling rod is end to end to be formed, and drill bit is installed in main drilling rod front end, after
End is threaded hole, and the one end extending drilling rod is whorl brace rod, and the other end is screwed hole, the end face pair of described whorl brace rod
Answer wind passage mouth that conic connector and sealing ring, conic connector and air channel grafting are set.Described adapter is connected with drill rod thread, connects
The end face correspondence wind passage mouth of device arranges conic connector and sealing ring, conic connector and air channel grafting.Described whorl brace rod is with close
Seal built-up joint has dual-seal performance；Therefore, after compressed gas enters the position, air channel of drilling rod, it is possible to higher
Speed and pressure compression drill hammer travel forward.The cavity minimum clearance that described sealing block is less with embedding slot diameter coordinates.
Described high pressure positive blower is connected with underground coal mine compressed air plant.
Described gear coal brush is plastic bruss, is in tilted layout along drilling rod inwall, and front end is drawn in.
The hollow part internal diameter of described gear coal brush place embedding slot is bigger；Therefore, under the contention effect of gases at high pressure, punching
Hitting drill bit drives spring the most quickly to move, and clashes into gangue, makes spoil rupture；Now, on the one hand, the pulling force of spring is relatively big,
On the other hand, the sealing block of drill hammer has been moved in the relatively large cavity of embedding slot, and gas leaks, and pressure reduces, and makes
Obtain drill hammer to retreat rapidly；After returning to certain distance, the pulling force of spring reduces, and is even changed into pressure, high pressure gas
Body weight novel sealing is in the air channel of drilling rod, or there is the leakage of trace, then, restarts the percussion drilling of a new round.
Described Pressure gauge is shockproof pressure gage, can monitor the gas pressure in twist drill rods air channel in real time.
The bearing installed on described housing is to seal bearing can effectively control the flow direction of gas.
Described bearing and the installation of bearing block, it can be ensured that when single unit system rotates, the drill hammer of front end and rear end
Rig housing does not and then rotate.
The coal bed drilling of a kind of quick penetration gangue is drilled method, comprises the following steps:
Step 1) starts underground coal mine compressed air plant, and high pressure draught drives rotary blade, and drives twist drill rods and rotation
Drill bit rotates, and creeps into coal seam depth；Along with the increase of drilling depth, new prolongation drilling rod is installed at any time；
Step 2) when coal bed drilling front runs into spoil, continue to creep into forward difficulty, the resistance of whole device increases, bullet
Property bearing block spring contraction, air inlet above adapter enters in rig housing, and partial high pressure air-flow is entered by air inlet
Drilling rod air channel, promotes drill hammer to travel forward, on the one hand, drill hammer clashes into the spoil in boring front, on the other hand, residue
High pressure draught simultaneously drive device with in, low speed rotation, i.e. rotary drilling-head with in, low speed rotation mode continues to creep into；
Step 3) drill hammer is when clashing into spoil, and its sealing block is through having migrated to keep off the afterbody of coal brush, embedding slot herein
Internal diameter broadens, pressure relief of gas；Meanwhile, the spring elongation of drill hammer afterbody is longer, produces bigger tension, and drill hammer is rapid
Being moved rearwards by, sealing block returns in the cavity that embedding slot internal diameter is less, and drilling rod air channel reseals, and the tension of spring disappears,
Open again creeping into of a new round, i.e. drill hammer creeps in a pulsed fashion；Before penetrating spoil, rotary drilling-head with in,
Low speed rotation mode is crept into continuously；After penetrating spoil, the boring front coal body drop in resistance to device, the air inlet of adapter
Exiting housing, pressure wind is completely used for driving rotary blade；Drill hammer stops creeping into, and rotary drilling-head mode rotate at high speed is continuous
Creep into；This device is according to the ocurrence of coal seam geological conditions in boring front, automatic switchover drill mode.
The beneficial effects of the utility model are: the coal bed drilling burrowing device of a kind of quick penetration gangue and method, should
Device is during drilling in coal, if running into gangue, can be switched fast the mode of creeping into, original high speed rotating creep into and turn
It is changed to middle low speed rotation and creeps into the drill mode combined with percussion drilling；The rock breaking capacity of rig is effectively promoted, and can solve
Certainly conventional drilling machine meets the technical barrier that spoil cannot continue to creep into.
This utility model uses mine compressed air to drive impeller to rotate, if boring front is coal body, then only by impeller
Drill bit is rotated creep into；When front of holing runs into gangue, creeping into resistance and increase, the amount of spring compression at impeller rear increases
Adding, the aperture position in connecting rod can enter rig housing, and the energy one of pressure wind is used for driving rotary drilling, a part to be used for
Driving percussion drilling, drill mode can automatically switch to rotary drilling-head and drill hammer is combined and crept into；After penetrating spoil, creep into
Drop in resistance, the amount of spring compression at impeller rear reduces, and rig housing, drill mode meeting can be exited in the aperture position in connecting rod
Again automatic switchover rotary drilling-head creeps into；This can be according to boring front ocurrence of coal seam geological conditions, automatic switchover drill mode,
Further, associating drill mode quickly, effectively can penetrate gangue, is the advantage of this utility model maximum.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, labelling is as follows: rotary drilling-head 1, drilling rod 2, gear coal brush 3, drill hammer 4, spring 5, bearing 6, sealing block 7, embedding
Tankage 8, screwed hole 9, whorl brace rod 10, air channel 11, sealing ring 12, joint steel pipe 13, Pressure gauge 14, adapter 15, air inlet
Mouth 16, impeller 17, connecting rod 18, bearing 19, spring 20, bearing 21, housing 22, air inlet 23, air outlet 24.
Detailed description of the invention
The coal bed drilling burrowing device of a kind of quick penetration gangue, including rotary drilling-head 1, drill hammer 4, twist drill rods
2, gear coal brush 3, spring 5,20, Pressure gauge 14 and high pressure positive blower；It is characterized in that, described drilling rod 2 center is provided with axial ducts
11, one end of drilling rod 2 is solidly connected rotary drilling-head 1, and offers, in drilling rod 2 end face axial, the step embedding slot 8 that outer imperial palace is little,
Bottom land connection air channel 11；Being provided with drill hammer 4 and gear coal brush 3 in embedding slot 8, gear brush 3 is arranged near notch, after drill hammer 4
Holding be linked in sequence sealing block 7 and spring 5, the other end of spring 5 is connected with the bearing 6 installed close to bottom land, and sealing block 7 is to wind
Road 11 air-flow plays sealing function；The other end of described drilling rod 2 is connected with high pressure positive blower, and described high pressure positive blower includes adapter
15, impeller 17, connecting rod 18, bearing 21, spring 20, bearing block, housing 22, air inlet 23 and air outlet 24；Described housing 22
For rectangle, a wherein side-wall hole be provided with bearing 19, its opposing sidewalls is provided with elastic shaft bearing, bearing 21 and bearing block
Centrage be positioned on same level line, the another pair of sidewalls of housing 22 is symmetrical arranged air inlet 23 and air outlet 24；Described company
Being provided with axial ducts 11 in connecing device 15, its sidewall is provided with the air inlet 16 in vertical connection air channel；Adapter 15 is by bearing 21 He
Bearing block is rotationally connected with housing 22, and adapter 15 one end is connected through housing 22 with drilling rod 2, drilling rod 2 and the wind of adapter 15
Road 11 communicates and seals, and adapter 15 other end is positioned at housing 22 and connection has rotary blade 17；Also install on described drilling rod 2
There is Pressure gauge 14；Under normal drill state, it is outside that air inlet 16 is positioned at housing 22, and drill hammer 4 is positioned at embedding slot 8 bottom land, high
Compressed gas in pressure fan is completely used for promoting impeller 17 to rotate, and impeller 17 drives drilling rod 2 and rotary drilling-head 1 high-speed rotation to bore
Hole；When boring front has spoil, boring resistance to increase, and the spring of elastic shaft bearing significantly compresses, the air inlet on adapter 15
Mouth 16 enters in high pressure positive blower housings 22, and Partial shrinkage gas enters drilling rod air channel 11, promotes drill hammer 4 to travel forward, with
Time reduce the compressed gas promotion ability to impeller 17, the rotating speed of rotary drilling-head 1 reduces, it is to avoid rotary drilling-head excessive wear.
Described elastic shaft bearing is formed by connecting by spring 20 and bearing 19.
Described drilling rod 2 is saved main drilling rod and more piece by one and extends that drilling rod is end to end to be formed, and drill bit is installed in main drilling rod front end, after
End is threaded hole 9, and the one end extending drilling rod is whorl brace rod 10, and the other end is screwed hole 9, described whorl brace rod 10
End face correspondence wind passage mouth arranges conic connector and sealing ring 12, conic connector and air channel 11 grafting.Described adapter 15 and drilling rod 2
Threaded, the end face correspondence wind passage mouth of adapter 15 arranges conic connector and sealing ring 12, conic connector and air channel 11 grafting.
Described whorl brace rod 10 has dual-seal performance with sealing ring built-up joint；Therefore, the wind of drilling rod 2 is entered when compressed gas
Behind position, road 11, it is possible to travel forward with higher speed and pressure compression drill hammer 4.
The cavity minimum clearance that described sealing block 7 is less with embedding slot 8 diameter coordinates.
Described high pressure positive blower is connected with underground coal mine compressed air plant.
Described gear coal brush 3 is plastic bruss, is in tilted layout along drilling rod 2 inwall, and front end is drawn in, both can effectively prevent cinder from entering
The hollow part of drilling rod, can not affect again advance and the retrogressing of drill hammer.
The hollow part internal diameter of described gear coal brush 3 place embedding slot 8 is bigger；Therefore, under the contention effect of gases at high pressure,
Drill hammer 4 drives spring 5 the most quickly to move, and clashes into gangue, makes spoil rupture；Now, on the one hand, the pulling force of spring 5
Relatively big, on the other hand, the sealing block 7 of drill hammer 4 has been moved in the relatively large cavity of embedding slot 8, and gas leaks, pressure
Reduce so that drill hammer 4 retreats rapidly；After returning to certain distance, the pulling force of spring 5 reduces, and is even changed into pressure
Power, gases at high pressure reseal in the air channel 11 of drilling rod 2, or there is the leakage of trace, then, restart a new round
Percussion drilling.
Described Pressure gauge 14 is shockproof pressure gage, can monitor the gas pressure in twist drill rods 2 air channel 11 in real time.
The bearing 21 installed on described housing 22 is to seal bearing can effectively control the flow direction of gas.
Described bearing 21 and the installation of bearing block, it can be ensured that when single unit system rotates, the drill hammer 4 of front end and rear end
Rig housing 22 and then do not rotate.
Twist drill rods 2 welds with rotary drilling-head 1；Gear coal brush 3 uses seccotine to stick in embedding slot 8 inwall；Spring 5 passes through
Electric welding respectively with the sealing block 7 of drill hammer 4 and and bearing 6 be connected and connect；The foreign steamer of bearing 6 leads to and drilling rod 2 embedding slot inwall
Welding.
Between each drilling rod 2 threaded, and connecting portion arranges sealing ring 12, it is ensured that the sealing in air channel.
Drilling rod 12 is connected by joint steel pipe 13 with Pressure gauge 14, and connected mode is threaded, and joint steel pipe 13 is even
Ventilating duct 11.
Adapter 15 welds with impeller 17, and is fixed with one with the inner ring of bearing 21；Connecting rod 18 front end and impeller 17
Welding, and be integrated with the inner ring of bearing 19.
Spring 20 welds with outer ring and the housing 19 of bearing 19 respectively；Bearing 21 welds with housing 19.
Gases at high pressure enter from the side of rotary blade 17, flow out from opposite side.
An embodiment of the present utility model is as follows:
Rotary drilling-head 1 is electric drill head for mining coal, diameter 50mm；Twist drill rods 2 is hollow twist drill rods, long 1000mm, diameter
42mm。
Gear coal brush 3 is plastic bruss, and long 40mm, diameter 1mm, quantity is some；The front end of drill hammer 4 is cone, circular cone
Base diameter 10mm, high 25mm, material be diamond, middle part and rear end be cylinder, material is carbon steel, diameter be respectively
6mm and 36mm, high respectively 30mm and 5mm.
Spring 5 and spring 20 are made up of many helical springs respectively, long 36mm, diameter 10mm, and quantity is some, and every thick
2mm；Bearing 6,21,19 is deep groove ball bearing, and internal diameter is 20mm, 30mm and 10mm respectively, external diameter be respectively 30mm, 40mm and
28mm, wide is 10mm.
The frustoconical bevel angle of conic connector is 30o, sealing ring 12 is O RunddichtringO, external diameter 8mm, internal diameter 6mm.
Joint steel pipe 13 is circular, and long 150mm, external diameter 10mm, wall thickness 1mm, making material is rustless steel；Pressure gauge 14 is
YTXC-150-Z shockproof pressure gage；The making material of adapter 15 is rustless steel, diameter 36mm, long 200mm.
The making material of connecting rod 18 is rustless steel, diameter 8mm, long 50mm；The making material of housing 19 is rustless steel, long
300mm, wide 400mm, highly differ, at middle part (rotary blade position) high 300mm, and both sides height 50mm；Rotary blade
The making material of 17 is antistatic plastic, for centrifugal impeller, diameter 30mm.
Work process of the present utility model is as follows:
The good high pressure positive blower of pre-assembly, drilling rod 2 and drill bit, and ensure high pressure positive blower and air channel 11 good seal.
Starting underground coal mine pressure wind, start to creep into, high pressure draught drives rotary blade 17, and drives drilling rod 2 and rotary drilling
Head rotates, and creeps into coal seam depth；Along with the increase of drilling depth, twist drill rods 2 can be increased at any time.
When coal bed drilling front runs into spoil, continue to creep into forward difficulty, the resistance of whole device is increased, spring 20
Shrinking, adapter 15 air inlet 16 above enters in housing 22, and partial high pressure air-flow is entered in Flos Cannabis boring by aperture
Heart position, promotes spring 5 and drill hammer 4 to travel forward.
On the one hand, drill hammer 4 clashes into the spoil in boring front, and on the other hand, remaining high pressure draught simultaneously drives dress
Put with in, low speed rotation, i.e. rotary drilling-head 1 with in, low speed rotation mode continues to creep into.
Drill hammer 4 is after clashing into spoil, and its afterbody has migrated to keep off the afterbody of coal brush 3, and aperture broadens, and gas unloads
Pressure, meanwhile, spring 5 stretches longer, produces bigger tension, and drill hammer 4 is moved rearwards by rapidly；When moving to certain position
After, the air channel 11 of twist drill rods 2 reseals, and the tension of spring 5 disappears, and opens again creeping into of a new round, i.e. drill hammer 4
It is to creep in a pulsed fashion.
Before penetrating spoil, rotary drilling-head 1 be with in, low speed rotation mode creeps into continuously；After penetrating spoil, boring
The front coal body drop in resistance to device, adapter 15 air inlet 16 above exits housing 22, and pressure wind is completely used for driving rotation
Rotary impeller 17；Drill hammer 4 stops creeping into, and rotary drilling-head 1 mode rotate at high speed is crept into continuously.
By above-mentioned work process, this device can be according to the ocurrence of coal seam geological conditions in boring front, and automatic switchover is crept into
Pattern；When creep into run into spoil time, two kinds of differences can be given full play to and creep into the advantage of mode, quickly break rock, penetrate spoil.
Claims (6)
1. a coal bed drilling burrowing device for quick penetration gangue, including rotary drilling-head, drill hammer, twist drill rods, gear
Coal brush, spring, Pressure gauge and high pressure positive blower；It is characterized in that, described drilling rod center is provided with axial ducts, and one end of drilling rod is solid
Connect rotary drilling-head, and offer the step embedding slot that outer imperial palace is little, bottom land connection air channel in drilling rod end face axial；Embedding slot
Inside being provided with drill hammer and gear coal brush, gear brush is arranged near notch, and drill hammer rear end has been linked in sequence sealing block and spring, bullet
The other end of spring is connected with the bearing installed close to bottom land, and air channel air-flow is played sealing function by sealing block；Described drilling rod another
One end is connected with high pressure positive blower, described high pressure positive blower include adapter, impeller, connecting rod, bearing, spring, bearing block, housing,
Air inlet and air outlet；Described housing is rectangle, wherein a side-wall hole be provided with bearing, and its opposing sidewalls is provided with elasticity
The centrage of bearing block, bearing and bearing block is positioned on same level line, the another pair of sidewalls of housing be symmetrical arranged air inlet and
Air outlet；Being provided with axial ducts in described adapter, its sidewall is provided with the air inlet in vertical connection air channel；Adapter passes through bearing
Being connected with housing into rotation with bearing block, adapter one end is connected with drilling rod through housing, the air channel of drilling rod and adapter communicate and
Sealing, the adapter other end is positioned at housing and connection has rotary blade；It is also equipped with Pressure gauge on described drilling rod；Normal drill
Under state, air inlet is positioned at hull outside, and drill hammer is positioned at embedding slot bottom land, and the compressed gas in high pressure positive blower is completely used for
Promotion impeller rotates, and impeller drives drilling rod and the boring of rotary drilling-head high-speed rotation；When boring front has spoil, boring resistance to increase
Greatly, the spring of elastic shaft bearing significantly compresses, and the air inlet on adapter enters in high pressure positive blower housing, Partial shrinkage gas
Enter drilling rod air channel, promote drill hammer to travel forward, reduce the compressed gas promotion ability to impeller, rotary drilling-head simultaneously
Rotating speed reduce, it is to avoid rotary drilling-head excessive wear.
The coal bed drilling burrowing device of a kind of quick penetration gangue the most according to claim 1, it is characterised in that described
Elastic shaft bearing is formed by connecting by spring and bearing.
The coal bed drilling burrowing device of a kind of quick penetration gangue the most according to claim 1, it is characterised in that described
Drilling rod is saved main drilling rod and more piece by one and extends that drilling rod is end to end to be formed, and drill bit is installed in main drilling rod front end, and rear end is threaded hole,
The one end extending drilling rod is whorl brace rod, and the other end is screwed hole, and the end face correspondence wind passage mouth of described whorl brace rod is arranged
Conic connector and sealing ring, conic connector and air channel grafting.
The coal bed drilling burrowing device of a kind of quick penetration gangue the most according to claim 1, it is characterised in that described
Adapter is connected with drill rod thread, and the end face correspondence wind passage mouth of adapter arranges conic connector and sealing ring, conic connector and wind
Road grafting.
The coal bed drilling burrowing device of a kind of quick penetration gangue the most according to claim 1, it is characterised in that described
The cavity minimum clearance that sealing block is less with embedding slot diameter coordinates.
The coal bed drilling burrowing device of a kind of quick penetration gangue the most according to claim 1, it is characterised in that described
High pressure positive blower is connected with underground coal mine compressed air plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620708578.7U CN205823155U (en) | 2016-07-07 | 2016-07-07 | A kind of coal bed drilling burrowing device of quick penetration gangue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620708578.7U CN205823155U (en) | 2016-07-07 | 2016-07-07 | A kind of coal bed drilling burrowing device of quick penetration gangue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205823155U true CN205823155U (en) | 2016-12-21 |
Family
ID=57565071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620708578.7U Withdrawn - After Issue CN205823155U (en) | 2016-07-07 | 2016-07-07 | A kind of coal bed drilling burrowing device of quick penetration gangue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205823155U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927149A (en) * | 2016-07-07 | 2016-09-07 | 华北科技学院 | Coal seam drilling device and method capable of quickly penetrating through coal gangue |
| CN109530278A (en) * | 2018-10-27 | 2019-03-29 | 梁豪创 | It rotatable propeller and its interrupts and rotary-cleaning device |
| CN116550705A (en) * | 2023-07-06 | 2023-08-08 | 山西众尚建设工程有限公司 | Cable calandria pull throughs |
-
2016
- 2016-07-07 CN CN201620708578.7U patent/CN205823155U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927149A (en) * | 2016-07-07 | 2016-09-07 | 华北科技学院 | Coal seam drilling device and method capable of quickly penetrating through coal gangue |
| CN105927149B (en) * | 2016-07-07 | 2018-07-06 | 华北科技学院 | The coal bed drilling burrowing device and method of a kind of quick penetration gangue |
| CN109530278A (en) * | 2018-10-27 | 2019-03-29 | 梁豪创 | It rotatable propeller and its interrupts and rotary-cleaning device |
| CN116550705A (en) * | 2023-07-06 | 2023-08-08 | 山西众尚建设工程有限公司 | Cable calandria pull throughs |
| CN116550705B (en) * | 2023-07-06 | 2023-09-05 | 山西众尚建设工程有限公司 | Cable calandria pull throughs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161221 Effective date of abandoning: 20180706 |