CN109667546A - It is a kind of to pass through the interior reamer of hydraulic pressure adjustment aperture - Google Patents
It is a kind of to pass through the interior reamer of hydraulic pressure adjustment aperture Download PDFInfo
- Publication number
- CN109667546A CN109667546A CN201910136058.1A CN201910136058A CN109667546A CN 109667546 A CN109667546 A CN 109667546A CN 201910136058 A CN201910136058 A CN 201910136058A CN 109667546 A CN109667546 A CN 109667546A
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- installation
- guide
- permanent magnet
- extension column
- magnet piece
- 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.)
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- 238000004080 punching Methods 0.000 claims abstract description 37
- 238000009434 installation Methods 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims description 13
- 235000014676 Phragmites communis Nutrition 0.000 claims description 8
- 230000001846 repelling effect Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 230000005389 magnetism Effects 0.000 description 23
- 238000000034 method Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
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
本发明提供了一种能够通过水压调节孔径的内扩孔器，属于机械技术领域。本内扩孔器包括冲孔刀头和与冲孔刀头等直径的延伸柱，延伸柱上开设有与延伸柱的轴线垂直的安装通槽，安装通槽的中部设置有两个对称分布在延伸柱轴线两侧扩孔刀头，扩孔刀头通过一转轴转动连接在延伸柱上，转轴上具有一齿轮，扩孔刀头的端部能够收缩在转轴上方的安装通槽内，延伸柱上固定设置有一扁平状的导向管，导向管内具有一通水孔，导向管的一端位于安装通槽内，导向管的另一端伸出连接端，导向管位于安装通槽内的一端套设有一顶罩，顶罩上具有两条分别与两个齿轮啮合的齿条，顶罩滑动连接在导向管上，通水孔连接高压水源。本发明具有扩孔平稳、高效等优点。
The invention provides an inner reamer capable of adjusting the aperture by water pressure, belonging to the technical field of machinery. The inner reamer includes a punching head and an extension column with the same diameter as the punching head. The extension column is provided with an installation through groove that is perpendicular to the axis of the extension column. Reaming cutter head on both sides of the column axis, the reaming cutter head is connected to the extension column through a rotating shaft, and there is a gear on the rotating shaft. A flat guide tube is fixedly arranged, and there is a water hole in the guide tube. The top cover is provided with two racks which are respectively meshed with the two gears, the top cover is slidably connected to the guide pipe, and the water through hole is connected to the high-pressure water source. The invention has the advantages of stable hole reaming, high efficiency and the like.
Description
Technical field
The invention belongs to field of mechanical technique, and being related to one kind can be by the interior reamer of hydraulic pressure adjustment aperture.
Background technique
Interior reamer, as the term suggests it is to process the tool of the more large aperture than entrance, reamer in inner to be processed
It is widely used in the fields such as mine development, building foundation engineering construction, geology, the hydrology.
Chinese patent [CN201610717127.4] discloses a kind of application method of interior reaming PDC drill bit, using with it is interior
The drilling tool of reaming PDC drill bit equivalent diameter first gets a datum hole on rock mass, is then put into bit feed end and gets in advance
Datum hole in, and ensure the moving knife wing, another moving knife wing completely into behind aperture and in the middle part of the datum hole, the moving knife wing and another moving knife
The upper end of effect of the slotted hole of the wing by axis, the moving knife wing and another moving knife wing starts to extend out and expands warp in the middle part of processing in datum hole
Hole；Then it is processing with explosive in datum hole of the middle part expansion through hole；Or concrete or glue are placed in datum hole and is inserted into
Drill rod is expanded using middle part and forms firm anti-taking off structure through hole；The present invention utilizes the two moving knife wings of interior reaming PDC drill bit
Middle part is got in datum hole to expand through hole, greatly facilitates the placement of explosive or the fixation of reinforcing bar, drill rod.The patent is using movable
The mode of wing, the inner cavity bigger compared with entrance can be outputed in interior of articles such as rocks can not still realize to cutter
It is cooling, meanwhile, aperture is uncontrollable, and different inner hole apertures need replacing various sizes of drill bit, it is well known that large-size drill is torn open
Fill very troublesome, time-consuming and laborious, if aperture can not be adjusted, the impact force that wing is subject to is larger, and can not preferably delay
Punching, it is very big to the damage of cutter.
Summary of the invention
In view of the above problems existing in the prior art, the purpose of the present invention is to provide one kind can pass through hydraulic pressure adjustment hole
The interior reamer of diameter, the technical problem to be solved by the present invention is to how pass through the hydraulic pressure for adjusting high-pressure water, to control reaming
The outer dip angle of cutter head, to realize the adjusting to counter bore diameter.
Object of the invention can be realized by the following technical scheme: one kind can pass through the interior reaming of hydraulic pressure adjustment aperture
Device, which is characterized in that in this reamer include punching cutter head and with the isodiametric extending column of piercing knife head, the extending column includes
Connecting pin and installation end, the punching cutter head are detachably connected on installation end, the axis with extending column are offered on the extending column
The vertical installation through slot of line, the both ends of the installation through slot are run through the outer wall of extending column, are provided in the middle part of the installation through slot
Two are symmetrically distributed in extension mast axis two sides reaming cutter, and the reaming cutter is rotatably connected on extending column by a shaft
On, there is a gear, the end of the reaming cutter can be contracted in the installation through slot above shaft, described in the shaft
It is fixedly installed a flat guide pipe on extending column, there is a limbers, one end of the guide pipe in the guide pipe
In installation through slot, the other end of the guide pipe stretches out connecting pin, and the guide pipe is located at the end cap in installation through slot
Equipped with an overhead guard, there are two rack gears engaged respectively with two gears on the overhead guard, the overhead guard is slidably connected at guiding
Guan Shang, the limbers connect high-pressure water.
The connecting pin connection driving power source of extending column in reamer, such as motor, enable punching cutter head to pass through rotation
It acts on object to be processed, after punching cutter head is punched out processing to object, increases the hydraulic pressure of high-pressure water, make overhead guard to peace
It is mobile to fill end, and drives two gear synchronous rotations, and then make reaming cutter flare, being formed in the two sides of extending column can process
Place's inner hole bigger compared with punching tool bit diameter.
High-pressure water refers to connection water source, and the water source for the pressure regulation device such as be provided with pressure-regulating valve refers to, in brief,
Pressure regulation device can ensure that the hydraulic pressure in limbers is in setting value always；Due to extending column be rotating motion part, guide pipe and
Rotary joint is set between high-pressure water.
This programme can realize the adjusting of counter bore diameter, and the flare intensity of reaming cutter by the adjusting to hydraulic pressure
It more mitigates, processing noise is smaller and smaller to the damage of reaming cutter.
Since two reaming cutters are synchronous, on the one hand reamer Mass Distribution can be made uniform, improve the stability of rotation,
But also it is stuck to can be avoided reaming cutter.
It a kind of can be fixedly installed on the punching cutter head in the interior reamer by hydraulic pressure adjustment aperture above-mentioned
One guide post is fixedly installed a guide cylinder on the overhead guard, and the guide post is plugged in guide cylinder, is covered in the guide post
Equipped with the holddown spring one being resisted against between guide cylinder and punching cutter head.
Holddown spring a pair of overhead guard plays the role of reset, and when stopping operation lower with hydraulic pressure, reaming cutter is contracted to
It installs in through slot, to prevent reaming cutter to the interference in punching mechanism, and reaming cutter in punching cutter head rotary course
It will not be thrown away except extending column because of centrifugal force.
It a kind of can also be slidably connected on the guide pipe in the interior reamer by hydraulic pressure adjustment aperture above-mentioned
One ejector sleeve, the ejector sleeve and installation through slot are connected with the holddown spring under compressive state between the bottom surface of connecting pin
Two, the rhone of several strips is offered on the tube wall of the guide pipe, the overhead guard is leaned on close to one end of ejector sleeve with ejector sleeve
The repulsion mechanism that can make to reserve certain gap between ejector sleeve and overhead guard always is provided between one end of nearly overhead guard.
Ejector sleeve can cover the position that rhone is located in ejector sleeve, overhead guard is arranged during mobile to overhead guard direction
Rhone in range can also be covered by overhead guard, drain the rhone between overhead guard and ejector sleeve can smoothly.
High-pressure water acts in guide pipe always, and when punching cutter head is punched out operation, hydraulic pressure is lower, in addition ejector sleeve
Between overhead guard have draining gap, so that this reamer is there is the spilling of cooling water in punching, in reaming, water flow according to
So exist, it is impaired to can be avoided each position high temperature of reamer.
It is above-mentioned it is a kind of can be in the interior reamer by hydraulic pressure adjustment aperture, the repulsions mechanism is pushed away including being fixed on
Permanent magnetism piece one on pipe and the permanent magnetism piece two being fixed on overhead guard, the right opposite homopolarity of the permanent magnetism piece one and permanent magnetism piece two.
Permanent magnetism piece one and permanent magnetism piece two can reserve certain draining seam by magnetic repellence between ejector sleeve and overhead guard
Gap, for the cooling in punching and reaming procedure, meanwhile, during hydraulic pressure increases, which is held essentially constant, energy
Ensure that the pressure that hydraulic pressure acts on overhead guard increases, enough to drive overhead guard mobile.
Due to compressed spring one, compressed spring two and repel mechanism three one " being flexible coupling " of formation, is formed preferable slow
Punching, draining gap change with the resistance that broad is subject to and change in a small range, and broad is made to be in " shake " state,
Reaming effect can not only be greatly improved, and is capable of increasing the protecting effect to each position of reamer.
It is above-mentioned it is a kind of can be in the interior reamer by hydraulic pressure adjustment aperture, the axis of the permanent magnetism piece one and extending column
In the inclination angle between 30 °~45 ° between line, the permanent magnetism piece one is parallel with permanent magnetism piece two.
It is above-mentioned it is a kind of can be in the interior reamer by hydraulic pressure adjustment aperture, the installation through slot is close to connecting pin
Bottom is the guide face of indent, and the water (flow) direction sprayed between permanent magnetism piece one and permanent magnetism piece two is towards guide face.
Water flow can be impacted first on guide face, then pass to punching cutter head direction, to prevent water stream from sputtering, while can
Improve cooling effect.
It is above-mentioned it is a kind of can be in the interior reamer by hydraulic pressure adjustment aperture, the repulsions mechanism has including one
The reed of certain helix angle, the both ends of the reed are born against on overhead guard and ejector sleeve.
Reed is ring-shaped jaggy, can be opposite between outline ejector sleeve and overhead guard there are longitudinally displaced between both ends
Constant draining gap.
It is above-mentioned it is a kind of can be in the interior reamer by hydraulic pressure adjustment aperture, the inner end of the reaming cutter has one
U-shaped installing port, the gear are located in the installing port.
The presence of installing port can make the engagement of wheel and rack steady, and the bonding strength of reaming cutter is larger.
Detailed description of the invention
Fig. 1 is sectional view of this reamer along fore-and-aft plane where installation through slot.
Fig. 2 is the sectional view in Fig. 1 on the direction A-A.
Fig. 3 is the enlarged drawing of part B in Fig. 1.
Fig. 4 is the structural schematic diagram of reaming cutter.
In figure, 1, punching cutter head；2, extending column；21, connecting pin；22, installation end；23, through slot is installed；31, reaming cutter；
32, gear；33, guide pipe；34, limbers；35, overhead guard；36, rack gear；37, guide post；38, guide cylinder；39, holddown spring
One；41, ejector sleeve；42, holddown spring two；43, rhone；51, permanent magnetism piece one；52, permanent magnetism piece two；6, installing port；7, guide face.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
As depicted in figs. 1 and 2, in this reamer include punching cutter head 1 and with the isodiametric extending column 2 of punching cutter head 1, prolong
Stretching column 2 includes connecting pin 21 and installation end 22, and punching cutter head 1 is detachably connected on installation end 22, offers and prolong on extending column 2
The vertical installation through slot 23 of the axis of column 2 is stretched, the both ends of installation through slot 23 are run through the outer wall of extending column 2, installed in through slot 23
Portion's setting is rotatablely connected there are two 2 axis two sides reaming cutter 31 of extending column, reaming cutter 31 is symmetrically distributed in by a shaft
On extending column 2, there is a gear 32, the end of reaming cutter 31 can be contracted in the installation through slot 23 above shaft in shaft
It is interior, it is fixedly installed a flat guide pipe 33 on extending column 2, there is a limbers 34 in guide pipe 33, guide pipe 33
One end is located in installation through slot 23, and the other end of guide pipe 33 stretches out connecting pin 21, and guide pipe 33 is located in installation through slot 23
One end is arranged with an overhead guard 35, has two rack gears 36 engaged respectively with two gears 32 on overhead guard 35, and the sliding of overhead guard 35 connects
It connects on guide pipe 33, limbers 34 connects high-pressure water.
The connection of the connecting pin 21 driving power source of extending column 2 in reamer, such as motor, enable punching cutter head 1 to pass through
Turning effort is on object to be processed, after punching cutter head 1 is punched out processing to object, increases the hydraulic pressure of high-pressure water, makes to push up
Cover 35 is mobile to installation end 22, and drives two 32 synchronous rotaries of gear, and then make 31 flare of reaming cutter, in extending column 2
Two sides, which are formed, can process place's inner hole bigger compared with 1 diameter of punching cutter head.
High-pressure water refers to connection water source, and the water source for the pressure regulation device such as be provided with pressure-regulating valve refers to, in brief,
Pressure regulation device can ensure that the hydraulic pressure in limbers 34 is in setting value always；Since extending column 2 is rotating motion part, guide pipe
Rotary joint is set between 33 and high-pressure water.
This programme can realize the adjusting of counter bore diameter, and the flare of reaming cutter 31 is strong by the adjusting to hydraulic pressure
Degree more mitigates, and processing noise is smaller and smaller to the damage of reaming cutter 31.
Since two reaming cutters 31 are synchronous, on the one hand reamer Mass Distribution can be made uniform, improve the stabilization of rotation
Property, but also it is stuck to can be avoided reaming cutter 31.
It is fixedly installed a guide post 37 on punching cutter head 1, a guide cylinder 38, guide post 37 are fixedly installed on overhead guard 35
It is plugged in guide cylinder 38, the holddown spring 1 being resisted against between guide cylinder 38 and punching cutter head 1 is arranged in guide post 37.
One 39 pairs of overhead guards 35 of holddown spring play the role of reset, and when stopping operation lower with hydraulic pressure, reaming cutter 31 is contracted to peace
It fills in through slot 23, to prevent reaming cutter 31 to the interference in punching mechanism, and cornish bit in 1 rotary course of punching cutter head
First 31 will not throw away except extending column 2 because of centrifugal force.
Also slidably connect an ejector sleeve 41 on guide pipe 33, ejector sleeve 41 and installation through slot 23 close to the bottom surface of connecting pin 21 it
Between be connected with the holddown spring 2 42 under compressive state, the rhone of several strips is offered on the tube wall of guide pipe 33
43, overhead guard 35 is provided between one end of overhead guard 35 close to one end of ejector sleeve 41 and ejector sleeve 41 can make ejector sleeve 41 and overhead guard
Always the repulsion mechanism in certain gap is reserved between 35.Ejector sleeve 41, being capable of the row of covering during mobile to 35 direction of overhead guard
Sink 43 is located at the position in ejector sleeve 41, and the rhone 43 that overhead guard 35 is arranged in range can also be covered by overhead guard 35, makes overhead guard
Rhone 43 between 35 and ejector sleeve 41 can be drained smoothly.
High-pressure water acts on always in guide pipe 33, and when punching cutter head 1 is punched out operation, hydraulic pressure is lower, in addition
There is the gap of draining between ejector sleeve 41 and overhead guard 35, so that this reamer is there is the spilling of cooling water in punching, in reaming
When, water flow still remains, and it is impaired to can be avoided each position high temperature of reamer.
Include the permanent magnetism piece 1 being fixed on ejector sleeve 41 and be fixed on overhead guard 35 forever as shown in figure 3, repelling mechanism
The right opposite homopolarity of magnetic sheet 2 52, permanent magnetism piece 1 and permanent magnetism piece 2 52.Permanent magnetism piece 1 and permanent magnetism piece 2 52 can pass through magnetic
Power is repelled, and certain draining gap is reserved between ejector sleeve 41 and overhead guard 35, for the cooling in punching and reaming procedure, together
When, during hydraulic pressure increases, which is held essentially constant, it can be ensured that hydraulic pressure acts on the increasing of the pressure on overhead guard 35
Greatly, to drive overhead guard 35 mobile.
Due to compressed spring one, compressed spring two and repel mechanism three one " being flexible coupling " of formation, is formed preferable slow
Punching, draining gap change with the resistance that broad is subject to and change in a small range, and broad is made to be in " shake " state,
Reaming effect can not only be greatly improved, and is capable of increasing the protecting effect to each position of reamer.
In the inclination angle between 30 °~45 °, permanent magnetism piece 1 and permanent magnetism piece between permanent magnetism piece 1 and the axis of extending column 2
2 52 is parallel.Install through slot 23 close to connecting pin 21 bottom be indent guide face 7, from permanent magnetism piece 1 and permanent magnetism piece 2 52
Between the water (flow) direction that sprays towards guide face 7.Water flow can first impact on guide face 7, then pass to 1 side of punching cutter head
To while can be improved cooling effect to prevent water stream from sputtering.
Repelling mechanism can also be such as flowering structure: including a reed with certain helix angle, the both ends point of reed
It is not resisted against on overhead guard 35 and ejector sleeve 41.Reed is ring-shaped jaggy, there are longitudinally displaced between both ends, can outline push away
Relative constant draining gap between pipe 41 and overhead guard 35.
As shown in figure 4, the inner end of reaming cutter has a U-shaped installing port 6, gear 32 is located in installing port 6.Installing port
6 presence can make gear 32 and engaging for rack gear 36 steady, and the bonding strength of reaming cutter 31 is larger.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136058.1A CN109667546A (en) | 2019-02-25 | 2019-02-25 | It is a kind of to pass through the interior reamer of hydraulic pressure adjustment aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136058.1A CN109667546A (en) | 2019-02-25 | 2019-02-25 | It is a kind of to pass through the interior reamer of hydraulic pressure adjustment aperture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109667546A true CN109667546A (en) | 2019-04-23 |
Family
ID=66151775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910136058.1A Withdrawn CN109667546A (en) | 2019-02-25 | 2019-02-25 | It is a kind of to pass through the interior reamer of hydraulic pressure adjustment aperture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109667546A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231133A (en) * | 2020-03-26 | 2020-06-05 | 石家庄正旭环保建材有限公司 | Reducing anchor bolt hole expanding drill bit |
| CN111594051A (en) * | 2020-05-13 | 2020-08-28 | 重庆科技学院 | Underground reaming angle regulator |
| CN112302557A (en) * | 2020-10-21 | 2021-02-02 | 北京佰文恒新能源服务有限公司 | Hydraulic cutting tool for various thick-wall pipes |
| CN115138754A (en) * | 2022-07-07 | 2022-10-04 | 张俊霞 | Aperture adjustable auto parts stamping die |
| CN116122731A (en) * | 2021-11-12 | 2023-05-16 | 长安大学 | Large-diameter-variable reaming device for deep holes |
| CN117703270A (en) * | 2023-11-23 | 2024-03-15 | 中国矿业大学(北京) | Mining system and method |
-
2019
- 2019-02-25 CN CN201910136058.1A patent/CN109667546A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231133A (en) * | 2020-03-26 | 2020-06-05 | 石家庄正旭环保建材有限公司 | Reducing anchor bolt hole expanding drill bit |
| CN111594051A (en) * | 2020-05-13 | 2020-08-28 | 重庆科技学院 | Underground reaming angle regulator |
| CN111594051B (en) * | 2020-05-13 | 2022-03-01 | 重庆科技学院 | A kind of downhole reaming angle adjuster |
| CN112302557A (en) * | 2020-10-21 | 2021-02-02 | 北京佰文恒新能源服务有限公司 | Hydraulic cutting tool for various thick-wall pipes |
| CN116122731A (en) * | 2021-11-12 | 2023-05-16 | 长安大学 | Large-diameter-variable reaming device for deep holes |
| CN115138754A (en) * | 2022-07-07 | 2022-10-04 | 张俊霞 | Aperture adjustable auto parts stamping die |
| CN117703270A (en) * | 2023-11-23 | 2024-03-15 | 中国矿业大学(北京) | Mining system and method |
| CN117703270B (en) * | 2023-11-23 | 2025-03-04 | 中国矿业大学(北京) | Mining system and method |
| US12338721B2 (en) | 2023-11-23 | 2025-06-24 | China University Of Mining And Technology, Beijing | Coal mining system and method of dual circulation drilling with mechanical reaming and abrasive jet |
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Application publication date: 20190423 |