CN106223846A - A kind of coal mine self-moving moves the steady boring device of base plate armature boring - Google Patents
A kind of coal mine self-moving moves the steady boring device of base plate armature boring Download PDFInfo
- Publication number
- CN106223846A CN106223846A CN201610583575.XA CN201610583575A CN106223846A CN 106223846 A CN106223846 A CN 106223846A CN 201610583575 A CN201610583575 A CN 201610583575A CN 106223846 A CN106223846 A CN 106223846A
- Authority
- CN
- China
- Prior art keywords
- underframe
- boring
- supporting cylinder
- base plate
- location
- 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.)
- Pending
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- 239000003245 coal Substances 0.000 title claims abstract description 23
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 8
- 241000233855 Orchidaceae Species 0.000 description 15
- 241000196324 Embryophyta Species 0.000 description 12
- 239000011435 rock Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
- E21B15/045—Hydraulic, pneumatic or electric circuits for their positioning
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/024—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting having means for adapting to inclined terrain; having means for stabilizing the vehicle while drilling
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of coal mine self-moving and move the steady boring device of base plate armature boring, including underframe (1), workpiece (2), added (3) and device positioning element (4)；Added it is fixedly mounted on underframe；Workpiece is arranged on underframe, including body (21), front and back gathering sill (22), front and back locator card blue (23), left and right gathering sill (24), left and right locator card blue (25), rig installing rack (26) and rig (27)；Device positioning element includes location supporting cylinder, top (41), location supporting cylinder, bottom (42) and control valve group and pumping plant (43), and control valve group and pumping plant are connected with top location supporting cylinder and location, bottom supporting cylinder respectively.This coal mine self-moving moves and realizes quickly carrying out roadway floor drilling operation on the premise of the steady boring device of base plate armature boring can provide reverse holding power in boring procedure, and overall raising rockbolt installation speed is adapted to the requirement of Quick Road-Made.
Description
Technical field
The present invention relates to a kind of drilling equipment, specifically one be applicable to underground coal mine roadway floor carries out anchor pole of holing
The coal mine self-moving of supporting moves the steady boring device of base plate armature boring, belongs to down-hole support equipment technical field.
Background technology
Due to the self-characteristic of different depth rock mass and the difference of residing ambient stress around tunnel, transported by geologic rhythm
The factor impacts such as dynamic, ground water pressure, country rock easily produces Incoordinate deformation, exploits especially for underground coal mine, top, tunnel, the end
Plate and two helps country rock to be deformed and move in tunnel, and the phenomenon that wherein roadway floor or gob floor upwards swell is i.e.
Referred to as pucking, pucking is a kind of dynamic phenomenon often occurred in roadway, it and the character of country rock, mining influence, mining depth
And geological structure etc. is directly related, some Floor Heave in Roadway amount of domestic mine even account for top, tunnel, the base plate amount of shifting near 70% with
On, bigger particular for mining depth, have that stress is high, temperature is high, subsoil water hydraulic pressure is high, strength of turbulence is high, danger of burst
The deep-seated setting of feature, high stress and soft rock mine roadway and the chambers such as height, creep is obvious, deformation is big, pucking makes roadway deformation, section become
Little, drastically influence the links such as mine ventilation, transport and personnel's walking, restriction mine safety and high-yield and high-efficiency and produce.
Underground coal mine prevents the generation of pucking phenomenon from not only wanting reinforcement roadway support, reinforced design method, and will be according to specifically
Wall rock geology condition take measures pucking amount is reduced to allowed band, generally use method for strengthening, destressing method, combination method and add
Gu the methods such as tunnel side, angle reduce pucking phenomenon, wherein method for strengthening is to be enclosed base plate by raising floor rocks intensity or raising
The supporting power of rock reaches the purpose of floor lift control, is a kind of the most frequently used pucking control method.
Improve the intensity of floor rocks, mainly have floor grouting, floor bolting etc., base plate is being used suspension roof support
Needing during operation first to hole base plate, traditional method need to be with pin or reversely air leg support above drilling rod in boring procedure
On back, to provide reverse holding power, but due in order to ensure that roadway floor does not destroys before installing anchor pole, it is necessary to
Installing anchor pole in driving face certain distance, the size of this distance is relevant with the character of floor rock, typically should be little
In 10 meters, the most unaffected in order to ensure tunnelling speed, the speed of usual rockbolt installation wants fast, and this traditional brill
Hole method operation not only complicated, manpower and materials consume big, and hole and install the speed of anchor pole compared with slow, efficiency is low, inadaptable
Requirement in Quick Road-Made.
Summary of the invention
For the problems referred to above, the present invention provides a kind of coal mine self-moving to move the steady boring device of base plate armature boring, simple in construction, energy
Realize quickly roadway floor being carried out drilling operation, and then entirety carries on the premise of reverse holding power is enough provided in boring procedure
High rockbolt installation speed, is adapted to the requirement of Quick Road-Made.
For achieving the above object, this coal mine self-moving moves the steady boring device of base plate armature boring and includes underframe, workpiece, added
With device positioning element；
Described added being fixedly mounted on underframe, underframe bottom is provided with the active at least including that one group of coaxial direction is arranged
The roller of wheel, drivewheel is provided with driving hydraulic motor；
Described workpiece is arranged on underframe, and, left and right blue including body, front and back gathering sill, front and back locator card guides
Groove, left and right locator card orchid, rig installing rack and rig；Body is located at fore-and-aft direction by cylindricality slip shoe frame and is arranged on inside underframe
Before and after on face on gathering sill；Front and back locator card is blue is connected with body and is equipped with on front and back's gathering sill；Rig installing rack
It is located at left and right directions by cylindricality slip shoe frame to be arranged on the left and right gathering sill on body medial surface；Left and right locator card orchid and rig
Installing rack connects and is equipped with on the gathering sill of left and right；Described rig is vertically arranged and is arranged on rig installing rack；
Described device positioning element includes location, top supporting cylinder, bottom location supporting cylinder and control valve group
And pumping plant；Location, top supporting cylinder is set to four, and location, four tops supporting cylinder piston end sets up, cylinder body
Centrosymmetry is vertically fixedly mounted on added diagonally adjacent, and its piston end end is provided with support footstock；Location, bottom
Support hydraulic cylinder is set to four, and location, four bottoms supporting cylinder piston end is down-set, location, cylinder body corresponding top supports
Position of Hydraulic Cylinder is vertically fixedly mounted on the diagonally adjacent of underframe, and its piston end end is provided with support base；Control valve group
And pumping plant be arranged on underframe or added on, the outfan of control valve group and pumping plant is supported by fluid pressure line and top location respectively
Hydraulic cylinder, bottom location supporting cylinder and driving hydraulic motor connect.
Scheme as a further improvement on the present invention, described body is by angle regulation positioning device and locator card front and back
Blue connection.
Scheme as a further improvement on the present invention, described rig installing rack passes through angle regulation positioning device and left and right
Locator card orchid connects.
Scheme as a further improvement on the present invention, described underframe and added be all frame structure.
Scheme as a further improvement on the present invention, described underframe and/or added frame structure two sides are provided with
Supporting rib stiffener arranged in a crossed manner.
Compared with prior art, this coal mine self-moving moves the steady boring device of base plate armature boring and is arranged on underframe owing to being provided with
Added, top location supporting cylinder and control valve group and pumping plant are arranged on added, and location, bottom supporting cylinder is installed
On underframe, therefore it is manipulated by valve group and pumping plant makes top location supporting cylinder and location, bottom supporting cylinder divide
Not stretching out, the support footstock of location, top supporting cylinder acts against on top board, the support base of location, bottom supporting cylinder
Acting against and make underframe form stable rigid support between back and base plate on base plate, during boring, the drilling rod of rig bores
The counteracting force entering base plate generation acts on underframe by rig installing rack, body, and active force is propped up by underframe by location, top
Support hydraulic cylinder and location, bottom supporting cylinder directly act on back and base plate, therefore need not on the drilling rod of rig
Side's pin or reversely air leg are supported on back to provide reverse holding power；Front and back guide owing to workpiece is provided with
Groove, front and back locator card orchid, left and right gathering sill, left and right locator card orchid, therefore move this coal mine self-moving base plate armature boring and surely bore dress
Put and can realize pinpointing a position after having good positioning and can complete the multiple rows of or operation in multiple row hole, i.e. can realize rig front and back
All full lines and the bore position of permutation in gathering sill and left and right gathering sill stroke range carry out location boring；This coal mine self-moving
Dynamic base plate armature boring steady boring device simple in construction, easily operated control, can carry out rockbolt installation after completing boring, boring and
The speed of anchor pole, installation effectiveness height are installed, are adapted to the requirement of Quick Road-Made, when being particularly well-suited to Floor Heave in Roadway is administered
Use the Quick mounting anchor rod of floor bolting.
Accompanying drawing explanation
Fig. 1 is the three dimensional structure schematic diagram of the present invention.
In figure: 1, underframe, 11, drivewheel, 12, drive hydraulic motor, 2, workpiece, 21, body, 22, front and back guide
Groove, 23, front and back locator card are blue, 24, left and right gathering sill, 25, left and right locator card blue, 26, rig installing rack, 27, rig, 3, on
Frame, 4, device positioning element, 41, location, top supporting cylinder, 42, location, bottom supporting cylinder, 43, control valve group and pump
Stand.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
As it is shown in figure 1, this coal mine self-moving moves the steady boring device of base plate armature boring includes underframe 1, workpiece 2, added 3 and
Device positioning element 4.
Described added 3 are fixedly mounted on underframe 1, and underframe 1 bottom is provided with and at least includes what one group of coaxial direction was arranged
The roller of drivewheel 11, drivewheel 11 is provided with driving hydraulic motor 12.
Described workpiece 2 is arranged on underframe 1, including body 21, front and back gathering sill 22, front and back locator card orchid 23,
Left and right gathering sill 24, left and right locator card orchid 25, rig installing rack 26 and rig 27；Before and after body 21 is located at by cylindricality slip shoe frame
Direction be arranged on underframe 1 medial surface before and after on gathering sill 22；Front and back locator card blue 23 is connected with body 21 and is equipped with
On front and back's gathering sill 22, body 21 can pass through front and back gathering sill 22 and front and back locator card orchid 23 fore-and-aft direction on underframe 1
Move and location；Rig installing rack 26 is located at, by cylindricality slip shoe frame, the left and right that left and right directions is arranged on body 21 medial surface and leads
On groove 24；Left and right locator card blue 25 is connected with rig installing rack 26 and is equipped with on left and right gathering sill 24, rig installation
Frame 26 can be moved by left and right gathering sill 24 and left and right locator card orchid 25 and position by left and right directions on body 21；Rig 27 erects
Straight setting is arranged on rig installing rack 26.
Described device positioning element 4 includes location, top supporting cylinder 41, bottom location supporting cylinder 42 and control
Valve group processed and pumping plant 43；Support more firm on the diagonal supporting leg of support body owing to supporting cylinder is vertically arranged in, therefore push up
Location, portion supporting cylinder 41 is set to four, and location, four tops supporting cylinder 41 piston end sets up, cylinder body center
Symmetrical be vertically fixedly mounted on added 3 diagonally adjacent, its piston end end is provided with support footstock；Location, bottom supports liquid
Cylinder pressure 42 is set to four, and location, four bottoms supporting cylinder 42 piston end is down-set, location, cylinder body corresponding top supports
Hydraulic cylinder 41 position is vertically fixedly mounted on the diagonally adjacent of underframe 1, and its piston end end is provided with support base；Control valve
Group and pumping plant 43 are arranged on underframe 1 or added 3, and the outfan of control valve group and pumping plant 43 is respectively by fluid pressure line and top
Location supporting cylinder 41, bottom location supporting cylinder 42 and driving hydraulic motor 12 connect.
Control to drive hydraulic motor 12 action that this coal mine self-moving moves base plate armature boring by control valve group and pumping plant 43
Steady boring device stays in and need to carry out operation control valve group and pumping plant 43 after on the roadway floor of base plate boring and make location, top support
Hydraulic cylinder 41 and location, bottom supporting cylinder 42 stretch out respectively, and the support footstock of location, top supporting cylinder 41 acts against top
On plate, the support base of location, bottom supporting cylinder 42 acts against and makes underframe 1 shape between back and base plate on base plate
Become rigid support, then unclamp before and after's locator card blue 23 and left and right locator card orchid 25, mobile body 21 to fore-and-aft direction needs to bore
Locator card orchid 23 before and after locking behind the position in hole, locks after then needing the position of boring on mobile drill installing rack 26 to left and right directions
Tight left and right locator card orchid 25, rig 27, the most just to bore position, starts rig 27 and carries out holing, rig 27 during boring
Drilling rod pierces the counteracting force of base plate generation and acts on underframe 1 by rig installing rack 26, body 21, and active force is led to by underframe 1
Cross top location supporting cylinder 41 and location, bottom supporting cylinder 42 directly acts on back and base plate；It is drilled first
The boring that individual Kong Houke directly unclamps before and after's locator card blue 23 or left and right locator card orchid 25 carries out on fore-and-aft direction or left and right directions
Position adjustment realizes the drilling operation of a row or string.
In order to realize this equipment can on fore-and-aft direction non-fully the roadway floor of level carry out vertical drilling, Jin Erzeng
The suitability of university degree equipment, as a further improvement on the present invention scheme, described body 21 passes through angle regulation positioning device
Is connected with front and back locator card blue 23, makes the drilling rod of rig 27 be perpendicular in the longitudinal direction by regulating angle regulation positioning device
The roadway floor of non-fully level and lock, vertical drilling can be realized.
In order to realize this equipment can on left and right directions non-fully the roadway floor of level carry out vertical drilling, Jin Erzeng
The suitability of university degree equipment, as a further improvement on the present invention scheme, described rig installing rack 26 is fixed by angular adjustment
Position mechanism is connected with left and right locator card blue 25, makes the drilling rod of rig 27 be perpendicular in left and right by regulation angle regulation positioning device
The roadway floor of the non-fully level on direction also locks, and can realize vertical drilling.
In order to alleviate the overall weight of whole device so that moving, scheme as a further improvement on the present invention, described
Underframe 1 and added 3 be all frame structure.
In order to increase the integrated support intensity of this equipment, scheme as a further improvement on the present invention, described underframe 1
And/or the frame structure two sides of added 3 are provided with supporting rib stiffener arranged in a crossed manner.
This coal mine self-moving moves the steady boring device of base plate armature boring owing to being provided with added 3 be arranged on underframe 1, and top positions
Supporting cylinder 41 and control valve group and pumping plant 43 are arranged on added 3, and location, bottom supporting cylinder 42 is arranged on underframe 1
On, therefore it is manipulated by valve group and pumping plant 43 makes top location supporting cylinder 41 and location, bottom supporting cylinder 42 points
Not stretching out, the support footstock of location, top supporting cylinder 41 acts against on top board, the support of location, bottom supporting cylinder 42
Base acts against and makes underframe 1 form stable rigid support between back and base plate on base plate, rig 27 during boring
Drilling rod pierce the counteracting force that base plate produces and act on underframe 1 by rig installing rack 26, body 21, underframe 1 is by active force
Back and base plate is directly acted on, the most not by top location supporting cylinder 41 and location, bottom supporting cylinder 42
Need to be supported on back to provide reverse holding power with pin or reverse air leg above the drilling rod of rig 27；Due to work
Make parts 2 and be provided with before and after's gathering sill 22, front and back locator card orchid 23, left and right gathering sill 24, left and right locator card orchid 25, therefore by this coal
Ore deposit can realize pinpointing a position after the steady boring device of movable base plate armature boring is had good positioning can complete multiple rows of or multiple row hole
Operation, i.e. can realize the rig 27 all full lines in front and back's gathering sill 22 and left and right gathering sill 24 stroke range and permutation
Bore position carry out location boring；This coal mine self-moving moves base plate armature boring steady boring device simple in construction, easily operated control,
Rockbolt installation can be carried out after completing boring, hole and the speed of anchor pole, installation effectiveness height are installed, being adapted to Quick Road-Made
Requirement, when being particularly well-suited to Floor Heave in Roadway is administered use floor bolting Quick mounting anchor rod.
Claims (5)
1. coal mine self-moving moves the steady boring device of base plate armature boring, including rig (27), it is characterised in that also include underframe
(1), workpiece (2), added (3) and device positioning element (4)；
Described added (3) are fixedly mounted on underframe (1), and underframe (1) bottom is provided with and at least includes that one group of coaxial direction is arranged
The roller of drivewheel (11), drivewheel (11) is provided with driving hydraulic motor (12)；
Described workpiece (2) is arranged on underframe (1), blue including body (21), front and back gathering sill (22), front and back locator card
(23), left and right gathering sill (24), left and right locator card blue (25), rig installing rack (26) and rig (27)；Body (21) passes through post
Shape slip shoe frame is located at before and after fore-and-aft direction is arranged on underframe (1) medial surface on gathering sill (22)；Front and back locator card is blue (23)
It is connected with body (21) and is equipped with on front and back's gathering sill (22)；Rig installing rack (26) is located at a left side by cylindricality slip shoe frame
Right direction is arranged on the left and right gathering sill (24) on body (21) medial surface；Left and right locator card blue (25) and rig installing rack
(26) connect and be equipped with on left and right gathering sill (24)；Described rig (27) is vertically arranged and is arranged on rig installing rack
(26) on；
Described device positioning element (4) include top location supporting cylinder (41), bottom location supporting cylinder (42) and
Control valve group and pumping plant (43)；Location supporting cylinder, top (41) is set to four, location, four tops supporting cylinder
(41) piston end sets up, cylinder body centrosymmetry is vertically fixedly mounted on the diagonally adjacent of added (3), its piston end end
Portion is provided with support footstock；Location supporting cylinder, bottom (42) is set to four, and four location supporting cylinder, bottoms (42) are lived
Plug end is down-set, the corresponding top of cylinder body positions supporting cylinder (41) position and is vertically fixedly mounted on the diagonal of underframe (1)
On direction, its piston end end is provided with support base；Control valve group and pumping plant (43) are arranged on underframe (1) or added (3), control
The outfan of valve group processed and pumping plant (43) is supported with location supporting cylinder, top (41), location, bottom by fluid pressure line respectively
Hydraulic cylinder (42) and driving hydraulic motor (12) connect.
Coal mine self-moving the most according to claim 1 moves the steady boring device of base plate armature boring, it is characterised in that described body
(21) it is connected with front and back's locator card blue (23) by angle regulation positioning device.
Coal mine self-moving the most according to claim 1 and 2 moves the steady boring device of base plate armature boring, it is characterised in that described
Rig installing rack (26) is connected with left and right locator card blue (25) by angle regulation positioning device.
Coal mine self-moving the most according to claim 3 moves the steady boring device of base plate armature boring, it is characterised in that described underframe
And added (3) are all frame structures (1).
Coal mine self-moving the most according to claim 4 moves the steady boring device of base plate armature boring, it is characterised in that described underframe
And/or the frame structure two sides of added (3) are provided with supporting rib stiffener arranged in a crossed manner (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583575.XA CN106223846A (en) | 2016-07-22 | 2016-07-22 | A kind of coal mine self-moving moves the steady boring device of base plate armature boring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583575.XA CN106223846A (en) | 2016-07-22 | 2016-07-22 | A kind of coal mine self-moving moves the steady boring device of base plate armature boring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106223846A true CN106223846A (en) | 2016-12-14 |
Family
ID=57531432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610583575.XA Pending CN106223846A (en) | 2016-07-22 | 2016-07-22 | A kind of coal mine self-moving moves the steady boring device of base plate armature boring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106223846A (en) |
-
2016
- 2016-07-22 CN CN201610583575.XA patent/CN106223846A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161214 |