CN105201405B - Propulsion device and drill jumbo for rock drill - Google Patents
Propulsion device and drill jumbo for rock drill Download PDFInfo
- Publication number
- CN105201405B CN105201405B CN201510622126.7A CN201510622126A CN105201405B CN 105201405 B CN105201405 B CN 105201405B CN 201510622126 A CN201510622126 A CN 201510622126A CN 105201405 B CN105201405 B CN 105201405B
- Authority
- CN
- China
- Prior art keywords
- rock drill
- propulsion device
- cylinder body
- forward beam
- sliding floor
- 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.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The propulsion device for rock drill of the present invention, including：Forward beam；Sliding floor, is movably disposed on forward beam, and for setting rock drill；Propelling cylinder, is arranged on forward beam, for promoting sliding floor to move；And displacement sensor, it is arranged on propelling cylinder, for monitoring the shift position of sliding floor in real time.Since displacement sensor can monitor the displacement of rock drill in real time, it is therefore desirable to directly set displacement sensor when changing drilling depth, it is made respective reaction when sliding floor moves to required amount of exercise.
Description
Technical field
The present invention relates to drill jumbo technical field, and particularly a kind of propulsion device for rock drill, further relates to
A kind of drill jumbo equipped with above-mentioned propulsion device.
Background technology
Drill jumbo is also drilling jumbo, is a kind of rock drilling equipment that tunnels and underground engineering uses drill bursting construction.
Drill jumbo generally comprises forward beam, the propelling cylinder and sliding floor being arranged on forward beam, and is fixed on
Rock drill on sliding floor.When in use, sliding floor is promoted to move by forward beam, so as to drive rock drill to complete to bore
Hole.For the ease of controlling the propulsion stroke of rock drill, travel switch is usually set on forward beam.Opened in rock drill touching stroke
Guan Hou, travel switch is excited and excitation signal is passed to the miscellaneous part of drill jumbo, final to control rock drill to stop work
Make.But when by travel switch to control the propulsion stroke of rock drill, a travel switch can only control one to promote row
Journey.When needing to promote stroke alteration, it is impossible to switched and controlled by the trip.That is, rock drill is controlled by travel switch
When promoting stroke, it is impossible to convenient to adjust.
Therefore, how to solve the problems, such as that the propulsion stroke of existing rock drill is not easy to adjust, be those skilled in the art
The technical issues that need to address.
The content of the invention
The present invention provides a kind of propulsion device for rock drill, simple in structure easy to adjust the drilling depth of rock drill.
The propulsion device for rock drill of the present invention, including：Forward beam；Sliding floor, is movably disposed at described
On forward beam, and for setting the rock drill；Propelling cylinder, is arranged on the forward beam, for promoting the slip bottom
Plate moves；And displacement sensor, it is arranged on the propelling cylinder, for monitoring the mobile position of the sliding floor in real time
Put.
In one embodiment, the cylinder body of the propelling cylinder is movably disposed on the forward beam and for promoting
The sliding floor movement, and the free end of the piston rod of the propelling cylinder is fixedly connected with the forward beam, wherein described
Displacement sensor is fixedly connected with the piston rod.
In one embodiment, institute's displacement sensors are fixed on the inside of the piston rod, and the displacement sensing
The pull rod of device is fixedly connected with the cylinder body.
In one embodiment, institute's displacement sensors be fixed on the piston rod in the through hole at both ends, wherein
The through hole of the piston rod is sealed with the cylinder body.
In one embodiment, the piston rod is equipped with makes the rod chamber of the cylinder body be in communication with the outside and makes institute respectively
State the oil body passage that the rodless cavity of cylinder body is in communication with the outside.
In one embodiment, institute's displacement sensors are fixed on one end equipped with piston of the piston rod.
In one embodiment, the pulley being fixed on the cylinder body is further included, wherein being arranged with one end on the pulley
It is fixed on the sliding floor and the other end is fixed on the preceding steel wire rope on the forward beam.
In one embodiment, the turntable being movably disposed on the forward beam is further included, wherein on the turntable
It is arranged with that one end is fixed on the sliding floor and the other end is fixed on the rear steel wire rope on the forward beam.
In one embodiment, further include to be fixed on and be used for the elastic tune for adjusting the preceding steel wire rope on the forward beam
Save screw rod.
The drill jumbo of the present invention, including rock drill, and for promoting the propulsion device of the rock drill, wherein described
Propulsion device is the propulsion device any one of above-mentioned.
Relative to the prior art, propulsion device of the invention controls the amount of exercise of sliding floor by displacement sensor, from
And control the propulsion stroke of rock drill.Since displacement sensor can monitor the displacement of rock drill in real time, it is therefore desirable to change
Displacement sensor is directly set during drilling depth, it is made respective reaction when sliding floor moves to required amount of exercise i.e.
Can.Thus the movement travel of rock drill can be easily adjusted after displacement sensor is provided with, consequently facilitating it is deep to change drilling
Degree, it is simple in structure, it is easy to use.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.
Fig. 1 is the front view of the drill jumbo of the embodiment of the present invention.
Fig. 2 is the propelling cylinder of the embodiment of the present invention and the mounting structure schematic diagram of displacement sensor.
Fig. 3 is the top view of the drill jumbo of the embodiment of the present invention.
In the accompanying drawings, identical component uses identical reference numeral.Attached drawing is not drawn according to actual ratio.
Embodiment
The present invention will be further described with reference to the accompanying drawings.
As shown in Figure 1, the propulsion device for rock drill 8 of the present invention includes forward beam 3, forward beam 3 is separately positioned on
On sliding floor 9 and propelling cylinder 10, and the displacement sensor 19 being arranged on propelling cylinder 10.Sliding floor 9 is removable
It is arranged on dynamicly on forward beam 3, and rock drill 8 is fixed on sliding floor 9.When in use, pushed away by propelling cylinder 10
Dynamic sliding floor 9 moves, and drives rock drill 8 to move by sliding floor 9.
Displacement sensor 19 is used for the displacement for monitoring sliding floor 9 in real time, so as to be obtained by the displacement of sliding floor 9
Go out the drilling depth of rock drill 8.Since displacement sensor 19 can monitor the displacement of rock drill 8 in real time (i.e. in sliding floor 9
Can be detected by displacement sensor 19 when moving to each position), it is therefore desirable to changing drilling depth, (i.e. rock drill 8 pushes away
Into stroke) when displacement sensor 19 is directly set, it is made respective reaction when sliding floor 9 moves to required amount of exercise
(such as the amount of exercise at the quarter being passed into automatic control unit, stop automatic control unit control propelling cylinder 10).
Thus the movement travel of rock drill 8 can be easily adjusted after displacement sensor 19 is provided with, consequently facilitating it is deep to change drilling
Degree, it is simple in structure, it is easy to use.
As shown in Fig. 2, propelling cylinder 10 includes cylinder body 10a and the piston rod 10b being arranged in cylinder body 10a.Piston rod 10b
The one end for being equipped with piston is located in cylinder body 10a, and the free end for being not provided with piston is located at outside cylinder body 10a.Piston rod 10b is by cylinder
Body 10a is divided into rod chamber 102 and rodless cavity 101, and piston rod 10b can produce relative movement between cylinder body 10a.
That is, when being filled with oil body into the rod chamber 102 of cylinder body 10a, piston rod 10b is moved with the direction that cylinder body 10a is overlapped toward each other；
When being filled with oil body into the rodless cavity 101 of cavity, piston rod 10b is moved with cylinder body 10a directions separated toward each other.
In one example, the free end of piston rod 10b is fixedly connected with forward beam 3.Cylinder body 10a is movably disposed at
On forward beam 3 (such as being directly placed on forward beam 3).The free end of piston rod 10b is fixed on the rear end of forward beam 3, and digs
The drilling rod 801 of rock machine 8 is located at the front end of forward beam 3.When the rod chamber 102 of cylinder body 10a is filled with oil body, cylinder body 10a is towards far
Direction movement from piston rod 10b, and finally drive rock drill 8 to drill.Oil body is filled with the rodless cavity 101 of cylinder body 10a
When, cylinder body 10a is moved towards close to the direction of piston rod 10b, and finally drives rock drill 8 to depart from drilling.Passing through cylinder body 10a
When driving the movement of forward beam 3, the stationarity of movement is higher, easy to set displacement sensor 19, and also it is simple in structure.
More specifically, two oil body passages are equipped with piston rod 10b.Wherein the first oil body passage 103 and cylinder body 10a
Rodless cavity 101 connect, the second oil body passage 104 is connected with the rod chamber 102 of cylinder body 10a.When extraneous oil body passes through first
When oil body passage 103 flows into the rodless cavity 101 of cylinder body 10a, the oil body in the rod chamber 102 of cylinder body 10a is led to by the second oil body
Road 104 flow to the external world, and cylinder body 10a is directed away from the direction movement of piston rod 10b at this time.When extraneous oil body passes through the second oil body
When passage 104 flows into the rod chamber 102 of cylinder body 10a, the oil body in the rodless cavity 101 of cylinder body 10a passes through the first oil body passage 103
The external world is flow to, cylinder body 10a is towards close to the movement of the direction of piston rod 10b at this time.So set, simple in structure, it is easy to process and
Installation, and it is easy to use.
When setting displacement sensor 19, displacement sensor 19 is fixedly connected with piston rod 10b, in order to install displacement
Sensor 19.In one example, the through hole 105 through its both ends is equipped with piston rod 10b.Displacement sensor 19 is fixed on
In the through hole 105 of piston rod 10b, and it is fixedly connected positioned at the pull rod 191 of sensor through through hole 105 with cylinder body 10a.In cylinder
Body 10a can drive the length of pull rod 191 to change when moving, and displacement sensor 19 by monitoring the length of its pull rod 191 in real time
Degree changes to monitor the amount of exercise of cylinder body 10a, so as to obtain the drilling depth of rock drill 8.Further, displacement sensor 19 is logical
Cross conducting wire for wearing through hole 105 etc. to be connected with positioned at extraneous such as automatic control unit, in order to realize automated control.It is logical
Said structure is crossed, the service life of displacement sensor 19 can be improved, and simple in structure, easy for installation, save trouble and labor.
When displacement sensor 19 is installed, one end equipped with piston of piston rod 10b is installed in.In this way, facilitate displacement
The connection of sensor 19 and cylinder body 10a, is easy to use.In order to ensure the effective exercise of cylinder body 10a, cylinder body 10a or oil body are prevented
Oil body in passage is flowed out from through hole 105, and the through hole 105 for setting displacement sensor 19 should be sealed with cylinder body 10a.One
In a example, seal plug is equipped with one end of the close piston of piston rod 10b, passes through seal plug spaced apart through apertures 105 and cylinder
Body 10a, and displacement sensor 19 is separated with the oil body in cylinder body 10a, to reduce damage of the oil body to displacement sensor 19.If
During the pull rod 191 of displacement sensor 19, pull rod 191 is connected directly through seal plug with cylinder body 10a.So set, knot
Structure is simple, easy for installation, save trouble and labor.
As shown in figures 1 and 3, propulsion device further includes the pulley 4 being fixed on cylinder body 10a.Reached in the length of cylinder body 10a
During less than demand, extension bar 6 can be set between pulley 4 and cylinder body 10a.That is, one end of extension bar 6 is connected with pulley 4, and one
End is connected with cylinder body 10a.Steel wire rope 7 before being arranged with pulley 4.One end and the front end of sliding floor 9 of preceding steel wire rope 7 are fixed
Connection, the other end are fixed on forward beam 3.When cylinder body 10a is directed away from the direction movement of piston rod 10b, pass through 4 band of pulley
Steel wire rope 7 moves before dynamic, and drives sliding floor 9 and rock drill 8 to move eventually through preceding steel wire rope 7.Passing through preceding steel wire rope 7
When driving the movement of sliding floor 9, the stroke of sliding floor 9 can be increased, and preceding steel wire rope 7 can be passed through and buffer rock drill 8
Influence of the impact vibration to propulsion device.Further, adjusting screw rod 15 is equipped with preceding steel wire rope 7, to adjust preceding steel wire
The tightness of rope 7.Adjusting screw rod 15 can be fixed on forward beam 3 and positioned at be connected with forward beam 3 the one of preceding steel wire rope 7
End, in order to install.
Propulsion device further includes the turntable 12 being movably disposed on forward beam 3.Rear steel wire is arranged with a turntable 12
Rope 11.One end of steel wire rope 11 is fixedly connected with the rear end of sliding floor 9 afterwards, and the other end is fixedly connected with (PLSCONFM with forward beam 3
It is whether correct).When cylinder body 10a is towards close to the movement of the direction of piston rod 10b, steel wire rope 11 is transported after being driven by turntable 12
It is dynamic, and drive rock drill 8 to depart from eyelet eventually through rear steel wire rope, but also rock drilling is further buffered by rear steel wire rope 11
Influence of the impact vibration of machine 8 to propulsion device.Preferably, one end being connected with forward beam 3 of rear steel wire rope 11 is arranged on dress
On binder 17, with steel wire rope after easy disassembly 11.Further, adjusting screw rod 18 also is provided with rear steel wire rope 11, to adjust
The tightness of steel wire rope 11 afterwards.Adjusting screw rod 18 can be fixed on clamp device 17, in order to install.
Propulsion device can also include puncheon centralizing device, drilling rod 801 is positioned and guided by puncheon centralizing device.In one example,
The puncheon centralizing device 2 before being fixedly arranged at the front end with of forward beam 3.Puncheon centralizing device 5 in being fixed with one end equipped with pulley 4 of extension bar 6.Pulley
4 are directly anchored on middle puncheon centralizing device 5.When installing rock drill 8 on sliding floor 9, the drilling rod 801 of rock drill 8 is helped before wearing
Pricker device 2 and middle puncheon centralizing device 5.When setting pulley 4, pulley 4 can be directly connected with middle puncheon centralizing device 5, with further simplified knot
Structure.
When the front end of forward beam 3 can be set for reducing 801 operation of drilling rod to the of the vibration effect of propulsion device
One damping rubber block 1.It may be provided for impact when buffering cylinder body 10a retracts to forward beam 3 in the rear end of forward beam 3
Second damping rubber block 14.In a specific example, forward beam 3 can be substantially into tabular.Set in the front end of forward beam 3
Vertical front apron 16 is put, vertical rear baffle 13 is set in the rear end of forward beam 3.First damping rubber block 1 is fixed on front
The front side of plate 16.Second damping rubber block 14 is fixed on rear baffle 13 and between rear baffle 13 and cylinder body 10a.Setting
Directly piston rod 10b can be fixed on rear baffle 13 during piston rod 10b.
The drill jumbo of the present invention includes rock drill 8 and propulsion device.Rock drill 8 is arranged on the sliding floor of propulsion device
On 9.Wherein propulsion device is equipped with displacement sensor 19.Equipped with the fortune that rock drill 8 can be easily adjusted after displacement sensor 19
Dynamic stroke, consequently facilitating change drilling depth, it is simple in structure, it is easy to use.
The drill jumbo can also set be connected respectively with propelling cylinder 10, displacement sensor 19 and rock drill 8 it is automatic
Control unit (not shown), to realize automatic drilling, reduces labour, saves labor cost.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and component therein can be replaced with equivalent.Especially, to be rushed as long as there is no structure
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical solutions including falling within the scope of the appended claims.
Claims (8)
1. a kind of propulsion device for rock drill, including：
Forward beam；
Sliding floor, is movably disposed on the forward beam, and for setting the rock drill；
Propelling cylinder, is arranged on the forward beam, for promoting the sliding floor to move；And
Displacement sensor, is arranged on the propelling cylinder, for monitoring the shift position of the sliding floor in real time,
The cylinder body of the propelling cylinder is movably disposed on the forward beam and for promoting the sliding floor to move, and
The free end of the piston rod of the propelling cylinder is fixedly connected with the forward beam, wherein the displacement sensor and the piston
Bar is fixedly connected, institute displacement sensors be fixed on the piston rod in the through hole at both ends, wherein the piston rod
Through hole is sealed with the cylinder body.
2. the propulsion device according to claim 1 for rock drill, it is characterised in that institute's displacement sensors are fixed on
The inside of the piston rod, and the pull rod of institute's displacement sensors is fixedly connected with the cylinder body.
3. the propulsion device according to claim 1 or 2 for rock drill, it is characterised in that the piston rod is equipped with
The oil body passage for making the rod chamber of the cylinder body be in communication with the outside and make the rodless cavity of the cylinder body be in communication with the outside respectively.
4. the propulsion device according to claim 1 or 2 for rock drill, it is characterised in that institute's displacement sensors are consolidated
It is scheduled on one end equipped with piston of the piston rod.
5. the propulsion device according to claim 1 or 2 for rock drill, it is characterised in that further include described in being fixed on
Pulley on cylinder body, wherein being arranged with that one end is fixed on the sliding floor on the pulley and the other end is fixed on the propulsion
Preceding steel wire rope on beam.
6. the propulsion device according to claim 1 or 2 for rock drill, it is characterised in that further include and movably set
The turntable on the forward beam is put, wherein being arranged with that one end is fixed on the sliding floor on the turntable and the other end is fixed
Rear steel wire rope on the forward beam.
7. the propulsion device according to claim 5 for rock drill, it is characterised in that further include and be fixed on the propulsion
It is used for the elastic adjusting screw rod for adjusting the preceding steel wire rope on beam.
8. a kind of drill jumbo, including rock drill, and for promoting the propulsion device of the rock drill, wherein described promote dress
It is set to the propulsion device any one of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622126.7A CN105201405B (en) | 2015-09-25 | 2015-09-25 | Propulsion device and drill jumbo for rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622126.7A CN105201405B (en) | 2015-09-25 | 2015-09-25 | Propulsion device and drill jumbo for rock drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105201405A CN105201405A (en) | 2015-12-30 |
| CN105201405B true CN105201405B (en) | 2018-05-04 |
Family
ID=54949318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510622126.7A Active CN105201405B (en) | 2015-09-25 | 2015-09-25 | Propulsion device and drill jumbo for rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105201405B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649553B (en) * | 2016-01-28 | 2017-10-27 | 常熟理工学院 | A kind of electro-hydraulic drive system of hydraulic gate propulsive mechanism |
| CN106223973B (en) * | 2016-08-31 | 2019-01-25 | 徐工集团工程机械有限公司 | Tunneling trolley drilling depth control method, system and tunneling trolley drilling equipment |
| CN107132036A (en) * | 2017-06-05 | 2017-09-05 | 西安航空制动科技有限公司 | A kind of undercarriage rigidity analogue and analogy method |
| CN107587847B (en) * | 2017-10-16 | 2024-04-05 | 湖南五新隧道智能装备股份有限公司 | Damping device and drilling jumbo |
| CN107621379B (en) * | 2017-10-27 | 2024-05-28 | 中国铁建重工集团股份有限公司 | Test equipment for drilling trolley |
| CN108868841A (en) * | 2018-07-06 | 2018-11-23 | 中国铁建重工集团有限公司 | A kind of rock bolting jumbo |
| CN110242318A (en) * | 2019-06-18 | 2019-09-17 | 中国铁建重工集团股份有限公司 | Cleaving mechanism and heading equipment |
| CN110439474B (en) * | 2019-08-27 | 2021-04-16 | 中铁隧道局集团有限公司 | Hinge type double-propelling-beam propelling mechanism |
| CN114776316B (en) * | 2022-06-22 | 2022-09-13 | 湖南鹏翔星通汽车有限公司 | Drilling depth accurate controllable rock drilling propulsion beam device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE424758B (en) * | 1978-04-11 | 1982-08-09 | Atlas Copco Ab | HYDRAULIC ADJUSTABLE DRILL BOOM |
| CN202627965U (en) * | 2012-04-24 | 2012-12-26 | 重庆工程职业技术学院 | Track type automatic drill jumbo |
| CN103470256A (en) * | 2013-09-27 | 2013-12-25 | 山西天巨重工机械有限公司 | Propulsion device of gadder |
| CN103967474B (en) * | 2014-05-23 | 2017-02-01 | 湖南有色重型机器有限责任公司 | Automatic positioning system of underground mining drill carriage |
| CN104074518B (en) * | 2014-07-16 | 2016-04-27 | 广西恒日科技股份有限公司 | Rock-boring splitter |
| CN104634673B (en) * | 2015-01-26 | 2017-04-05 | 中国矿业大学 | Rock fracture in dynamic indentation multi-function test stand |
| CN205154011U (en) * | 2015-09-25 | 2016-04-13 | 中国铁建重工集团有限公司 | A advancing device and drill jumbo for rock drill |
-
2015
- 2015-09-25 CN CN201510622126.7A patent/CN105201405B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105201405A (en) | 2015-12-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105201405B (en) | Propulsion device and drill jumbo for rock drill | |
| CN205154011U (en) | A advancing device and drill jumbo for rock drill | |
| CN101887273B (en) | Automatic height-adjusting test device of coal mining machine roller and control method | |
| KR101780154B1 (en) | Hydraulic percussion device and construction equipment having the same | |
| CN205403842U (en) | Coal -winning machine cut analogue test platform | |
| RU2018116873A (en) | OPTIMIZED DIRECTED DRILLING WITH APPLICATION OF MEASUREMENT DATA TAKEN DURING DRILLING | |
| CN201857226U (en) | Crane oil cylinder groove entering auxiliary guide connecting rod device | |
| CN103935730A (en) | Method and device for monitoring broken chain of mining scraper conveyer | |
| CN102139612A (en) | Vehicle as well as method and device for leveling hydro-pneumatic suspension of same | |
| CN203905944U (en) | Mechanism used for detecting as well as controlling impact to protect mining machine according to detection result | |
| CN202968487U (en) | Steel wire rope tension detection system for hydraulic decoking of delayed coking device | |
| CN201604495U (en) | Vehicle and hydro-pneumatic suspension leveling device thereof | |
| CN109538111A (en) | A kind of constant speed feed coal petrography drilling cuttings measuring device | |
| CN114776316B (en) | Drilling depth accurate controllable rock drilling propulsion beam device | |
| CN208918468U (en) | A kind of hydraulic rock drilling rig | |
| KR102072601B1 (en) | 4 step variable intelligent auto stroke hydraulic breaker | |
| CN110395543A (en) | A kind of scraper conveyer chain auto-tensioning control system | |
| CN102818697A (en) | Device for evaluating performances of window opening machine | |
| CN103306284A (en) | Construction machine and method for operating same | |
| CN107445073B (en) | Truck-mounted drilling rig combined type lifting device and application method | |
| CN103994120A (en) | Hydraulic support pushing oil cylinder control device and control method thereof | |
| KR20180013823A (en) | Hydraulic percussion device and construction equipment having the same | |
| CN207879348U (en) | Box culvert top drag reduction plate displacement automatic control structure | |
| CN207622625U (en) | A kind of tunnel digging smooth blasting device | |
| US20160121472A1 (en) | Method for controlling the impact energy of an impulse piston of a percussion tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Feixiang Inventor after: Andersen Peter Inventor after: Cheng Yongliang Inventor after: Zheng Daqiao Inventor after: Ma Chengbiao Inventor after: Liu Zaizheng Inventor after: Cao Yapeng Inventor after: Zou Liyong Inventor after: Fang Shuangpu Inventor before: Liu Feixiang Inventor before: Cheng Yongliang Inventor before: Zheng Daqiao Inventor before: Ma Chengbiao Inventor before: Liu Zaizheng Inventor before: Cao Yapeng Inventor before: Zou Liyong Inventor before: Fang Shuangpu |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 410100 No. 88 East 7 Line, Changsha Economic and Technological Development Zone, Hunan Province Patentee after: China Railway Construction Heavy Industry Group Co., Ltd. Address before: 410100 Changsha Province, the city of Hunan by the East Road, No. seven, No. 88 Patentee before: China Railway Construction Heavy Industry Co.,Ltd. |
|
| CP03 | Change of name, title or address |