CN108331542A - A kind of novel linkage up and down of coal mine drilling machine - Google Patents
A kind of novel linkage up and down of coal mine drilling machine Download PDFInfo
- Publication number
- CN108331542A CN108331542A CN201810428367.1A CN201810428367A CN108331542A CN 108331542 A CN108331542 A CN 108331542A CN 201810428367 A CN201810428367 A CN 201810428367A CN 108331542 A CN108331542 A CN 108331542A
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- Prior art keywords
- support plate
- supporting rack
- hydraulic cylinder
- coal mine
- fixedly connected
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- 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.)
- Pending
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- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 239000003245 coal Substances 0.000 title claims abstract description 21
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 210000000078 claw Anatomy 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/14—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/18—Connecting or disconnecting drill bit and drilling pipe
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of novel linkages up and down of coal mine drilling machine,Including the first supporting rack,Store up rod box and pedestal,Pedestal has been bolted in one end of first supporting rack,Corner strap has been bolted in the other end of first supporting rack,The corner strap upper surface is by being welded with the second supporting rack,Second supporting rack is welded with third support plate in one end far from corner strap,The side of the third support plate is fixedly connected with the first support plate,The other side of the third support plate is fixedly connected with the second support plate,It is welded with first axle on the downside of second support plate,The first axle is connect by the first rotary shaft with gripper,The gripper includes the second fixed block,First hydraulic cylinder and claw,The bottom end of second fixed block is fixedly connected with first hydraulic cylinder,One end of the first hydraulic cylinder is fixedly connected with third fixed block.Easy to operate, accurate positioning of the invention, Stability and dependability are high.
Description
Technical field
The present invention relates to coal mine equipment technology field, the novel linkage up and down of specially a kind of coal mine drilling machine.
Background technology
Drilling machine is that one kind being widely used in one of drilling equipment necessary to coal mining, is mainly used for inside mine, with
It the mankind to exploit the coal mine in deeper, more severe coal seam, not only needs the safety for ensureing staff, while also to be promoted
The efficiency of work, it is also just higher and higher to the performance requirement of drilling equipment in this way.The degree of automation of traditional hydraulic drill rig is not
Height, labor intensity is big when leading to actual production, especially changes during bar, needs that work could be continued after manually finishing changing drilling rod
Make, since drilling rod is heavier, it from ground is transported to clamper central axes from be to have certain altitude, be accomplished manually and just particularly eat
Power also results in the safety of staff certain threat, and the working efficiency of hydraulic drill rig is also very low, influences whole open
Progress is adopted, heavy losses economically can be also caused.
The shortcomings that hydraulic drill rig of continuous bar function automatic at present is a kind of driller, overcomes conventional drilling machine, with tradition
The advantages that drilling machine is compared, and has the amount of labour low, and safety is good, and work efficiency is high.Automatically continuous linkage is the key that hydraulic drill rig
Also there is a kind of automatic pipe-rod changing mechanism in mechanism, drilling rod can be transported according to specified movement locus, reduces the operation of worker
Intensity, major mining area are promoting and applying.
But this one kind has the function of that continuing bar hydraulic drill rig automatically all has the following problems：
1) it changes bar part and mainly changes bar operation by holder pivots oil cylinder and clamper rotation motor to realize, disadvantage exists
It is divided into once linear motion and rotary motion twice in movement locus, movement locus is complicated, and move has accumulated error every time, and three
Secondary accumulated error is excessive, it is difficult to ensure that lower beam operation can be completed accurately；
2) bar part is changed to be made of clamping hydraulic cylinder, small pivot angle hydraulic cylinder, big swing angle hydraulic cylinder, clamper, deficiency
It is in and changes bar process in it and need to be rotated in different joints, movement locus is complicated and joint positioning accuracy request
Higher, in addition the influence of manipulator its own gravity and the weight of drilling rod, error is larger, it is difficult to ensure that lower beam can be completed accurately
Operation；
3) China Patent Publication No. CN202832306U, innovation and creation are automatic dress lever apparatus, and the program discloses one kind
Bar slot stores up bar, and drilling rod movement is realized by the design to oil cylinder effective travel using the lever mechanism lever with resetting spring
Position is accurately positioned, and is finally completed dress bar operation, its shortcoming is that condition is moist under coal mine, it is easy to cause spring corrosion
Failure, this scheme once stores up about 20 drilling rods of bar in addition, and frequently changing drilling rod causes spring frequently to compress and stretch, the use of spring
Service life is low.
4) part novel hydraulic drilling machine by upper and lower lever apparatus be mounted on pedestal above or below, whole height often compared with
Height, can largely occupy tunnel space resources, and when barrier occupy head-room when, drilling machine can not be transported to designated position into
Row work.
Therefore, it is necessary to research and develop a kind of easy to use, the simple and adaptable hydraulic drill rig of control process is on novel
Lower linkage.
Invention content
The purpose of the present invention is to provide a kind of novel linkages up and down of coal mine drilling machine, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the present invention provides the following technical solutions：A kind of coal mine drilling machine novel linkage up and down, packet
The first supporting rack, storage rod box and pedestal are included, pedestal, first support has been bolted in one end of first supporting rack
The other end of frame has been bolted corner strap, and the corner strap upper surface is by being welded with the second supporting rack, and described second
Supporting rack is welded with third support plate in one end far from corner strap, and the side of the third support plate is fixedly connected with first
The other side of fagging, the third support plate is fixedly connected with the second support plate, and is welded on the downside of second support plate
One hinge, the first axle are connect by the first rotary shaft with gripper, and the gripper includes the second fixed block, the first liquid
The bottom end of cylinder pressure and claw, second fixed block is fixedly connected with first hydraulic cylinder, and one end of the first hydraulic cylinder is fixed
It is connected with third fixed block, one end of the third fixed block is fixedly connected with second hydraulic cylinder, and the two of the second hydraulic cylinder
Side is equipped with fixed plate, and one end of the second hydraulic cylinder is connect by the second rotary shaft with first support bar, first support
Bar one end is connect by the 4th rotary shaft with second support bar, and one end of the second support bar passes through third rotary shaft and claw
Connection, the side of the gripper are fixedly connected with second hinge, and the second hinge is connect by the second rotary shaft with cylinder,
The cylinder is fixedly connected by clamper with third support plate, and one end upper surface of the pedestal is equipped with gear-box, described
The side of gear-box is equipped with main folder holder, and the side of the main folder holder is equipped with drilling rod, during the side of the drilling rod is equipped with
Between clamper, the storage rod box connect by fixed block with the second supporting rack.
Preferably, the storage rod box is provided with two groups, respectively upper rod box and lower rod box, and puts up 10 ° with the second support
~20 ° of angles.
Preferably, the both sides of second support plate are equipped with graduated scale, and the both sides of the fixed plate are equipped with pointer label.
Preferably, the first axle is welded on the centre of the second support plate, and the clamper is welded on third support plate
Centre.
Preferably, first supporting rack, corner strap and the second supporting rack are respectively arranged with four groups, and the first supporting rack and
Second supporting rack is vertical relation.
Preferably, the box width of the storage rod box is about 926-1026mm.
Preferably, the clamper is made of being hinged by rotary shaft by two annular slots.
Compared with prior art, the beneficial effects of the invention are as follows：
1) storage linkage is welded on the both sides of rig substructure, and whole height is welded on than storage linkage under rig substructure
The height of side or top will substantially reduce, and be conducive to hydraulic drill rig in smaller coal mine roadway or in the top of transport device
Running.
2) hydraulic drill rig is compact-sized, and gripper is pushed away by cylinder side, and lower beam process in realization is gripped compared to direct-push
Device not only greatly reduces the abrasion between part, while easy to operate, accurate positioning, Stability and dependability are also further
It is promoted.
3) coal mine drilling machine is equipped with pointer label and graduated scale with novel linkage up and down, except gripper capable of being made to be accurately positioned
Outside, staff can also recording data improve the work of staff convenient for debugging hydraulic drill rig crawl drilling rod position
Make efficiency, while also being advanced optimized for the equipment and data reference is provided, the constantly improve equipment.
Description of the drawings
Fig. 1 is overall structure of the present invention；
Fig. 2 is present invention linkage front view up and down；
Fig. 3 is present invention linkage side view up and down；
Fig. 4 is gripper structural schematic diagram of the present invention；
Fig. 5 is gripper axonometric drawing of the present invention；
Fig. 6 is partial structural diagram of the present invention；
Fig. 7 is holder structure schematic diagram of the present invention.
In figure：1 first supporting rack, 2 corner straps, 3 second supporting racks, 4 first fixed blocks, 5 cylinders, 6 first support plates, 7
Second support plate, 8 first axles, 9 first rotary shafts, 10 grippers, 101 second fixed blocks, 102 first hydraulic cylinders, 103 are fixed
Plate, 104 second rotary shafts, 105 first support bars, 106 second support bars, 107 claws, 108 third rotary shafts, 109 the 4th rotations
Shaft, 110 second hydraulic cylinders, 111 third fixed blocks, 11 drilling rods, 12 second rotary shafts, 13 second hinges, 14 clampers, 15
Three support plates, 16 storage rod boxes, 17 pedestals, 18 main folder holders, 19 intermediate clampers, 20 gear-boxes, 21 pointer labels, 22 indexing
Ruler.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 7 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of novel linkage up and down of coal mine drilling machine, including
First supporting rack 1, storage rod box 16 and pedestal 17, one end of first supporting rack 1 have been bolted pedestal 17, and described the
Corner strap 2 has been bolted in the other end of one supporting rack 1, and 2 upper surface of the corner strap is by being welded with the second supporting rack
3, first supporting rack 1, corner strap 2 and the second supporting rack 3 are respectively arranged with four groups, and the first supporting rack 1 and second supports
Frame 3 is vertical relation, and second supporting rack 3 is welded with third support plate 15, the third branch in one end far from corner strap 2
The side of fagging 15 is fixedly connected with the first support plate 6, and the other side of the third support plate 15 is fixedly connected with the second support
The both sides of plate 7, second support plate 7 are equipped with graduated scale 22, and the both sides of the fixed plate 103 are equipped with pointer label 21, are convenient for
Being accurately positioned for gripper is stored with data, and the downside of second support plate 7 is welded with first axle 8, the first axle 8
It is welded on the centre of the second support plate 7, the clamper 14 is welded on the centre of third support plate 15, and the first axle 8 is logical
It crosses the first rotary shaft 9 to connect with gripper 10, the gripper 10 includes the second fixed block 101, first hydraulic cylinder 102 and claw
107, the bottom end of second fixed block 101 is fixedly connected with first hydraulic cylinder 102, and one end of the first hydraulic cylinder 102 is solid
Surely it is connected with third fixed block 111, one end of the third fixed block 111 is fixedly connected with second hydraulic cylinder 110, and described second
The both sides of hydraulic cylinder 110 are equipped with fixed plate 103, and one end of the second hydraulic cylinder 110 passes through the second rotary shaft 104 and first
Strut 105 connects, and 105 one end of the first support bar connect by the 4th rotary shaft 109 with second support bar 106, and described the
One end of two supporting rods 106 is connect by third rotary shaft 108 with claw 107, and the side of the gripper 10 is fixedly connected with
Second hinge 13, the second hinge 13 are connect by the second rotary shaft 12 with cylinder 5, the cylinder 5 by clamper 14 with
Third support plate 15 is fixedly connected, and the clamper 14 is made of being hinged by rotary shaft by two annular slots, and energy is more preferable
Fixation cylinder 5, and flexible modulation clamper 14 grip cylinder 5 position, the pedestal 17 one end upper surface installation it is with teeth
The side of roller box 20, the gear-box 20 is equipped with main folder holder 18, and the side of the main folder holder 18 is equipped with drilling rod 11, described
The side of drilling rod 11 is equipped with intermediate clamper 19, and the storage rod box 16 is connect by fixed block 4 with the second supporting rack 3, described
Storage rod box 16 is provided with two groups, respectively upper rod box and lower rod box, and utilizes brill at 10 °~20 ° angles with the second supporting rack 3
Bar its own gravity carries out storage-pole, and 16 box width of storage rod box is about 926-1026mm.
Operation principle：
The invention is in upper boom process：Staff pushes away gripper 10 by controlling 5 side of cylinder, makes gripper 10 to close to folder
14 side of holder rotates, and reference pointer label 21 and 22 setting of graduated scale make gripper 10 reach designated position angle, pass through
First hydraulic cylinder 102 and second hydraulic cylinder 110 it is flexible, while driving first support bar 105, second support bar 106 and card
The synergistic effect of pawl 107, the drilling rod 11 for making the gripping storage rod box 16 of claw 107 fall, after gripping, gripper is pushed away by 5 side of cylinder
10 reach the position (i.e. 90 degree positions of graduated scale 22) vertical with the second support plate 7, while downward by first hydraulic cylinder 102
It is flexible, it stretches to designated position, drilling rod 11 is clamped by intermediate clamper 19, then pass through gear-box 20, main folder holder
18 and drilling rod 11 travel forward, make the tail portion of the head precession drilling rod 11 of drilling rod 11, carry out upper boom；
The invention is in lower beam process：Drilling rod 11 is clamped by intermediate clamper 19, then passes through gear-box 20, main folder
Holder 18 and drilling rod 11 move backward, and the head of drilling rod 11 is made to screw out the tail portion of drilling rod 11, and 5 side of cylinder pushes away the arrival of gripper 10
The position vertical with the second support plate 7, while flexible downwards by first hydraulic cylinder 102, stretches to designated position, then passes through the
Two hydraulic cylinders 110, first support bar 105, the synergistic effect of second support bar 106 and claw 107 grip drilling rod 11,
After gripping, gripper 10 is pushed away by 5 side of cylinder, so that gripper 10 is rotated to far from 14 side of clamper, reference pointer label 21
With 22 setting of graduated scale, gripper 10 is set to reach designated position angle, then pass through first hydraulic cylinder 102 and second hydraulic cylinder
110 it is flexible, while driving first support bar 105, the synergistic effect of second support bar 106 and claw 107, drilling rod 11 put
Enter into storage rod box 16, completes lower beam operation.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of coal mine drilling machine novel linkage up and down, including the first supporting rack (1), storage rod box (16) and pedestal (17),
It is characterized in that：One end of first supporting rack (1) has been bolted pedestal (17), first supporting rack (1) it is another
One end has been bolted corner strap (2), and corner strap (2) upper surface is by being welded with the second supporting rack (3), and described
Two supporting racks (3) are welded with third support plate (15), the side of the third support plate (15) in one end far from corner strap (2)
It is fixedly connected with the first support plate (6), the other side of the third support plate (15) is fixedly connected with the second support plate (7), institute
It states and is welded with first axle (8) on the downside of the second support plate (7), the first axle (8) passes through the first rotary shaft (9) and machinery
Pawl (10) connects, and the gripper (10) includes the second fixed block (101), first hydraulic cylinder (102) and claw (107), described
The bottom end of second fixed block (101) is fixedly connected with first hydraulic cylinder (102), and one end of the first hydraulic cylinder (102) is fixed
It is connected with third fixed block (111), one end of the third fixed block (111) is fixedly connected with second hydraulic cylinder (110), described
The both sides of second hydraulic cylinder (110) are equipped with fixed plate (103), and one end of the second hydraulic cylinder (110) passes through the second rotary shaft
(104) it is connect with first support bar (105), described first support bar (105) one end passes through the 4th rotary shaft (109) and second
Strut (106) connects, and one end of the second support bar (106) is connect by third rotary shaft (108) with claw (107), institute
The side for stating gripper (10) is fixedly connected with second hinge (13), the second hinge (13) by the second rotary shaft (12) with
Cylinder (5) connects, and the cylinder (5) is fixedly connected by clamper (14) with third support plate (15), the pedestal (17)
One end upper surface is equipped with gear-box (20), and the side of the gear-box (20) is equipped with main folder holder (18), and the main folder is held
The side of device (18) is equipped with drilling rod (11), and the side of the drilling rod (11) is equipped with intermediate clamper (19), the storage rod box
(16) it is connect with the second supporting rack (3) by fixed block (4).
2. a kind of novel linkage up and down of coal mine drilling machine according to claim 1, it is characterised in that：The storage rod box
(16) two groups are provided with, respectively upper rod box and lower rod box, and with the second supporting rack (3) at 10 °~20 ° angles.
3. a kind of novel linkage up and down of coal mine drilling machine according to claim 1, it is characterised in that：Second support
The both sides of plate (7) are equipped with graduated scale (22), and the both sides of the fixed plate (103) are equipped with pointer label (21).
4. a kind of novel linkage up and down of coal mine drilling machine according to claim 1, it is characterised in that：The first axle
(8) it is welded on the centre of the second support plate (7), the clamper (14) is welded on the centre of third support plate (15).
5. a kind of novel linkage up and down of coal mine drilling machine according to claim 1, it is characterised in that：First support
Frame (1), corner strap (2) and the second supporting rack (3) are respectively arranged with four groups, and the first supporting rack (1) and the second supporting rack (3) are
Vertical relation.
6. the novel linkage up and down of a kind of coal mine drilling machine according to claim 1 and 2, it is characterised in that：The storage bar
The box width of case (16) is about 926-1026mm.
7. a kind of novel linkage up and down of coal mine drilling machine according to claim 1, it is characterised in that：The clamper
(14) it is made of being hinged by rotary shaft by two annular slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810428367.1A CN108331542A (en) | 2018-05-07 | 2018-05-07 | A kind of novel linkage up and down of coal mine drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810428367.1A CN108331542A (en) | 2018-05-07 | 2018-05-07 | A kind of novel linkage up and down of coal mine drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108331542A true CN108331542A (en) | 2018-07-27 |
Family
ID=62934924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810428367.1A Pending CN108331542A (en) | 2018-05-07 | 2018-05-07 | A kind of novel linkage up and down of coal mine drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108331542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513059A (en) * | 2019-10-08 | 2019-11-29 | 安徽理工大学 | A kind of all-hydraulic coal mine drilling machine lever apparatus and method up and down automatically |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233691A (en) * | 2013-04-11 | 2013-08-07 | 中煤科工集团重庆研究院 | Large-dip-angle drill pipe delivering device supporting coal drilling rig |
| CN105003201A (en) * | 2015-07-06 | 2015-10-28 | 河南科技大学 | Automatic pipe replacing hydraulic drill rig for coal mine |
| CN105041238A (en) * | 2015-07-06 | 2015-11-11 | 河南科技大学 | Automatic rod replacing device of hydraulic drill rig for coal mine |
| CN106223876A (en) * | 2016-09-21 | 2016-12-14 | 安徽理工大学 | All-hydraulic coal mine drilling machine upper and lower lever apparatus automatically |
| CN107542416A (en) * | 2017-10-24 | 2018-01-05 | 安徽理工大学 | Lower beam hydraulic pressure coal ore deposit rig and thereon lower beam method are continuously gone up automatically in a kind of ultralow hole |
-
2018
- 2018-05-07 CN CN201810428367.1A patent/CN108331542A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233691A (en) * | 2013-04-11 | 2013-08-07 | 中煤科工集团重庆研究院 | Large-dip-angle drill pipe delivering device supporting coal drilling rig |
| CN105003201A (en) * | 2015-07-06 | 2015-10-28 | 河南科技大学 | Automatic pipe replacing hydraulic drill rig for coal mine |
| CN105041238A (en) * | 2015-07-06 | 2015-11-11 | 河南科技大学 | Automatic rod replacing device of hydraulic drill rig for coal mine |
| CN106223876A (en) * | 2016-09-21 | 2016-12-14 | 安徽理工大学 | All-hydraulic coal mine drilling machine upper and lower lever apparatus automatically |
| CN107542416A (en) * | 2017-10-24 | 2018-01-05 | 安徽理工大学 | Lower beam hydraulic pressure coal ore deposit rig and thereon lower beam method are continuously gone up automatically in a kind of ultralow hole |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513059A (en) * | 2019-10-08 | 2019-11-29 | 安徽理工大学 | A kind of all-hydraulic coal mine drilling machine lever apparatus and method up and down automatically |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180727 |
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| RJ01 | Rejection of invention patent application after publication |