CN209011781U - A kind of core drilling rig - Google Patents
A kind of core drilling rig Download PDFInfo
- Publication number
- CN209011781U CN209011781U CN201821704036.8U CN201821704036U CN209011781U CN 209011781 U CN209011781 U CN 209011781U CN 201821704036 U CN201821704036 U CN 201821704036U CN 209011781 U CN209011781 U CN 209011781U
- Authority
- CN
- China
- Prior art keywords
- drilling rig
- forward beam
- core drilling
- fixing seat
- bracket
- 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
Abstract
The utility model discloses a kind of core drilling rigs, and including power head and the fixing seat being capable of fixing inside development machine, fixing seat is equipped with bar shaped forward beam, and forward beam is equipped with the bracket for being fixedly connected with power head；Wherein, fixing seat is removably connect with forward beam, and bracket is slidably connected with forward beam.Core drilling rig disclosed by the utility model adopts a split structure, and can stay in inside development machine the fixing seat of core drilling rig when being not necessarily to and carrying, while power head, bracket, forward beam being removed together, realize the effect for having subtracted core drilling rig occupied space.
Description
Technical field
The utility model relates to rock stratum core-taking technology fields, more specifically to a kind of core drilling rig.
Background technique
Development machine needs to carry core drilling rig in the construction process.In the prior art, in order to carry core drilling rig, development machine
Be reserved with interface agency, and core drilling rig docked with interface agency after can not usually remove, lead to the coring in tunneler construction
Drilling machine is in carrying state always.However since tunneler construction process is without persistently using core drilling rig, carrying type knot
The core drilling rig of structure occupies the space of development machine, reduces construction efficiency.
It is that current those skilled in the art urgently solve in conclusion how to provide a kind of core drilling rig to occupy little space
Certainly the problem of.
Utility model content
In view of this, being torn open the purpose of the utility model is to provide a kind of core drilling rig without using Shi Kecong development machine
Under, reduce core drilling rig the space occupied.
To achieve the goals above, the utility model provides the following technical solutions:
A kind of core drilling rig, including power head further include the fixing seat being capable of fixing inside development machine, the fixing seat
On be removably provided with bar shaped forward beam, the forward beam is equipped with the bracket for being fixedly connected with the power head, and
The bracket is slidably connected with the forward beam.
Preferably, the lateral wall of the lower part of the forward beam is equipped with the first protrusion；The outside of the forward beam is equipped with clamping plate,
The clamping plate is equipped with the first card slot that can be bonded with first protrusion, to adjust the position of the forward beam along its length
It sets；The clamping plate is connect by the first bolt with the fixing seat.
Preferably, the top of the forward beam is equipped with sliding rail, and the bracket includes the sliding block that can be moved along the sliding rail；Institute
Forward beam is stated equipped with the U-lag of notch upward, and is equipped with the driving portion for driving the sliding block mobile in the U-lag.
Preferably, the sliding rail is the second protrusion set on the forward beam lateral wall, and the sliding block is equipped with can be along described
Second card slot of the second protrusion sliding, the bracket further includes the supporting plate for being fixedly connected with the power head, the supporting plate
It is bolted with the sliding block by second.
Preferably, the nut of the nut of first bolt and/or second bolt is eccentric nut.
Preferably, the driving portion includes the propelling cylinder being fixedly connected with the forward beam, the work of the propelling cylinder
Plug is equipped with pulley, and the peripheral pulley is equipped with the tractive unit being fixedly connected with the supporting plate.
Preferably, the fixing seat lower end is equipped with telescopic supporting leg, to adjust the propulsion depth of beam.
Preferably, the supporting leg includes the sleeve being fixedly connected with the fixing seat and the branch for being socketed on the sleeve inner
The side wall of bar, the sleeve is equipped with through-hole, and the tight fixed bolt that can push the strut side wall is equipped in the through-hole.
Preferably, the deslagging pump of the core drilling rig, control section, power section are flexibly connected by pipeline, to adjust
Save installation site.
Preferably, the pumping plant of the power section is hydraulic power unit.
Core drilling rig provided by the utility model includes power head and the fixing seat that is capable of fixing inside development machine, fixed
Seat is equipped with bar shaped forward beam, and forward beam is equipped with the bracket for being fixedly connected with power head；Wherein, fixing seat and forward beam
Dismountable connection, bracket are slidably connected with forward beam.It, can be motor-driven by core drill when development machine needs to carry core drilling rig
Power head and forward beam are mounted in fixing seat；When without that the fixing seat of core drilling rig can be stayed in driving when carrying core drilling rig
Inside machine, while power head, bracket, forward beam being removed together, to reduce the occupied space of core drilling rig.
Core drilling rig provided by the present application adopts a split structure, and without that can carry out partial dismantling when carrying, realizes
Reduce the effect of core drilling rig occupied space.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the sectional side view of installation interface provided by the utility model；
Fig. 2 is the main view of local installation interface provided by the utility model；
Fig. 3 is the structural schematic diagram of open type complete-section tunnel boring machine provided by the utility model；
Fig. 4 is the structural schematic diagram of shield formula complete-section tunnel boring machine provided by the utility model；
Fig. 5 is the system connection schematic diagram of core drilling rig provided by the utility model；
Fig. 6 is the top view of control section provided by the utility model；
Fig. 7 is the main view of control section provided by the utility model；
Fig. 8 is the main view of power section provided by the utility model；
Fig. 9 is the side view of power section provided by the utility model；
Figure 10 is the structural schematic diagram of deslagging pump provided by the utility model.
Appended drawing reference in Fig. 1~10 are as follows:
Center cutter 01, center cutterhead 02, bottom shield 03, body frame 04, main driving 05, cutterhead scraper bowl 06, cutterhead 07, shield body row
The mouth of a river 08, lower gripper 09；
Coring part 1, control section 2, power section 3, power distribution cabinet 31, pumping plant 32, deslagging pump 4；
Strut 101, sleeve 102, tight fixed bolt 103, fixing seat 104, clamping plate 105, the first bolt 106, forward beam 107,
Sliding block 108, the second bolt 109, supporting plate 110, power head 111, hoist engine 112.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The core of the utility model is to provide a kind of core drilling rig, removes without using Shi Kecong development machine, to subtract
The space for the development machine that small core drilling rig occupies.
Fig. 1~10 is please referred to, Fig. 1 is the sectional side view of installation interface provided by the utility model；Fig. 2 is the utility model
The main view of provided part installation interface；Fig. 3 is open type complete-section tunnel boring machine provided by the utility model
Structural schematic diagram；Fig. 4 is the structural schematic diagram of shield formula complete-section tunnel boring machine provided by the utility model；Fig. 5 is this
The system connection schematic diagram of core drilling rig provided by utility model；Fig. 6 is bowing for control section provided by the utility model
View；Fig. 7 is the main view of control section provided by the utility model；Fig. 8 is power section provided by the utility model
Main view；Fig. 9 is the side view of power section provided by the utility model；Figure 10 is deslagging provided by the utility model
The structural schematic diagram of pump.
The utility model provides a kind of core drilling rig, including power head 111 and is capable of fixing consolidating inside development machine
Reservation 104, is removably provided with bar shaped forward beam 107 in fixing seat 104, forward beam 107 be equipped with for power head 111
The bracket being fixedly connected, and bracket is slidably connected with forward beam 107.
Specifically, core drilling rig includes control section 2, power section 3, coring part 1 and deslagging pump 4.With reference to Fig. 6 and figure
7, control section 2 mainly includes the console that can control corresponding component positive and negative rotation, propulsion, clamping.With reference to Fig. 8 and Fig. 9, power
Part 3 includes that can drive the pumping plant 32 and power distribution cabinet 31 of power head 111, wherein pumping plant 32 can be used the mode of hydraulic control into
Row driving, improves the reliability of work.Coring part 1 is mainly including power head 111, drilling rod and for connecting power head 111
And installation interface of development machine etc.；Wherein, power head 111 is the power source of core drilling rig work, is mainly used for that drilling rod is driven to return
Turn, power head 111 and lower gripper 09 cooperate during the work time, and bear the working impact of drilling rod and pressurize when creeping into
Pressure.With reference to Figure 10, deslagging pump 4 is connect with coring part 1, for the rock slag mud of location of the coring procedure to be discharged.
With reference to Fig. 1 and Fig. 2, installing interface includes fixing seat 104, forward beam 107, bracket etc..Wherein, fixing seat 104 is logical
It crosses welding or other modes is fixedly connected with development machine, the effect of fixing seat 104 is connection forward beam 107 and development machine.It promotes
Beam 107 is removably connect by modes such as bolt, buckles with fixing seat 104, and forward beam 107 is specific elongated, in order to protect
Hinder the stability that forward beam 107 connects, two or more fixing seats 104 can be set along its length below forward beam 107；
In addition, the top of forward beam 107 slidably connects bracket, bracket is simultaneously advanced with power head 111 in pressurization drilling process, complete
At construction operation.In actual use, in order to pull out the fisher of core drilling rig, the end of forward beam 107 can be with
Hoist engine 112 is set.
In use, power head 111, installation interface and development machine are sequentially connected, to realize consolidating for power head 111
It is fixed.Since core drilling rig adopts a split structure, forward beam 107 and fixing seat 104 are removably connected, when development machine needs are taken
It, can be by power head 111, bracket and 107 integral installation of forward beam in fixing seat 104 when carrying core drilling rig；When without carrying
When core drilling rig, the fixing seat 104 of core drilling rig can be stayed in inside development machine, while by power head 111, bracket, forward beam
107 remove together, to reduce the occupied space of core drilling rig.
Core drilling rig provided by the present application can be used as carrying type core drilling rig one using dismountable split type mechanism
Directly it is mounted on development machine；It can also be used as portable core drilling rig to use, plug and play, be torn open without carrying out part when carrying
It removes, realizes the effect for reducing core drilling rig occupied space, and it is smaller to the change of development machine to carry the core drilling rig, core drill
The versatility of machine is higher.
It should be noted that during core drilling rig and the practical carrying of development machine assemble, for open type tunneling boring
Rock tunnel(ling) machine needs first to remove the center cutter 01 on center cutterhead 02 with reference to Fig. 3, then in 05 inner ring of main driving and body frame
Core drilling rig is installed, wherein the fixing seat 104 of core drilling rig is fixed on the bottom shield 03 of development machine in 04.And for single shield
The shields formulas such as complete-section tunnel boring machine, double shield complete-section tunnel boring machines, balancing earth-pressure shielding machine, slurry balance shield machine
Complete-section tunnel boring machine needs first to open the shield body discharge outlet 08 on shield partition with reference to Fig. 4, removes mud ponding, so
Rotary head 07 afterwards enables cutterhead scraper bowl 06 and shield body discharge outlet 08 be in same straight line, and in the bottom mounting-fixing base of shield body
104。
Optionally, in order to further save the space inside development machine, with reference to Fig. 5, power section 3, the control of core drilling rig
Part 2, coring part 1 and deslagging pump 4 processed are successively flexibly connected by pipeline.Each component uses the arrangement of piecemeal,
Can be adjusted flexibly in actual use according to the real space inside development machine can part installation site, for example, by deslagging
Pump 4, control section 2, power section 3 are placed on the rear mating trolley of development machine, to reduce the occupied driving of each section
Space inside machine.
Further, in order to optimize the using effect of core drilling rig, on the basis of the above embodiments, forward beam 107
The lateral wall of lower part is equipped with the first protrusion；The outside of forward beam 107 is equipped with clamping plate 105, and clamping plate 105 is equipped with can be with the first protrusion
First card slot of fitting, to adjust the position of forward beam 107 along its length；Clamping plate 105 is by the first bolt 106 and fixes
Seat 104 connects.
Specifically, the two sides of forward beam 107 are symmetrically arranged with clamping plate 105, the setting along its length of 107 outside of forward beam is cut
Face the first protrusion triangular in shape or rectangular, correspondingly, clamping plate 105 is provided with and the first protrusion close to the side of forward beam 107
Corresponding first card slot of shape.During the installation process, the opposite position of forward beam 107 Yu clamping plate 105 can be adjusted according to actual needs
It sets, clamping plate 105 is connect by 107 position of forward beam after determining using the first bolt 106 with fixing seat 104, and clamping plate 105 can at this time
It clamps and fixes forward beam 107.
Further, it is contemplated that power head 111 needs forward end to promote during the work time, in the present embodiment, forward beam
107 top is equipped with sliding rail, and bracket includes can be along the sliding block 108 that sliding rail moves；Forward beam 107 is equipped with the U-lag of notch upward,
And the driving portion for driving sliding block 108 mobile is equipped in U-lag.Specifically, the section of forward beam 107 is in U-shape, specifically include
Bottom plate and two side plates connecting with bottom plate, clamping plate 105 are arranged in the outside of two side plates, forward beam 107 are fixed.It pushes away
Into being arranged driving portion in the U-lag inside beam 107, the top of the side plate of forward beam 107 is arranged sliding rail, driving portion control bracket with
Power head 111 is slided along sliding rail together, propulsion that is real and then realizing drilling rod.
Optionally, in a kind of embodiment provided by the present application, sliding rail is the second protrusion set on 107 lateral wall of forward beam,
Sliding block 108 is equipped with can be along the second card slot of the second protrusion sliding, and bracket further includes the supporting plate for being fixedly connected with power head 111
110, supporting plate 110 is connect with sliding block 108 by the second bolt 109.Specifically, section is arranged in the top of the side plate of forward beam 107
It is square, the second protrusion of triangle or other shapes, and the second protrusion extends along the length direction of forward beam 107.Bracket packet
Sliding block 108 and supporting plate 110 are included, sliding block 108 is symmetricly set on the outside of forward beam 107, and sliding block 108 is close to forward beam 107
Side setting can be along the second card slot of the first protrusion sliding；Supporting plate 110 is fixedly connected by bolt with power head 111, simultaneously
Supporting plate 110 is fixedly connected by the second bolt 109 with sliding block 108 and carries out synchronous slide.
Optionally, in order to reinforce the locking effect of the first bolt 106, the second bolt 109, the nut of the first bolt 106,
The nut of two bolts 109 can specifically use eccentric nut.
Optionally, in a kind of embodiment provided by the present application, driving portion includes the propulsion oil being fixedly connected with forward beam 107
Cylinder, the piston of propelling cylinder are equipped with pulley, and peripheral pulley is equipped with the tractive unit being fixedly connected with supporting plate 110.That is, using movable pulley
Principle control supporting plate 110 and sliding block 108 it is jointly mobile.Specifically, propelling cylinder is fixed on by the modes such as welding, bolting
In the U-lag of forward beam 107, the piston of propelling cylinder can be moved along the length direction of forward beam 107, and pulley is arranged on piston.
Tractive unit can specifically select flexible steel wire, rope cable or other kinds of hawser, can also specifically select chain.Tractive unit
One end position is fixed, the other end is fixedly connected with supporting plate 110, and the periphery of pulley is set in the middle part of tractive unit.When piston moves
When dynamic, tractive unit controls two times of strokes of the mobile piston of supporting plate 110.
Further, in order to enable core drilling rig to match different types of development machine, the versatility of core drilling rig is improved,
On the basis of any one above-mentioned embodiment, 104 lower end of fixing seat is equipped with telescopic supporting leg, to adjust forward beam 107
Height.Specifically, fixing seat 104 is fixedly connected by supporting leg with development machine, supporting leg lower end is welded and fixed with development machine, and props up
Leg itself is retractable structure, to facilitate the height and position for adjusting power head 111 according to use demand.Particularly, for pushing away
The structure of multiple fixing seats 104 is set below into beam 107, if the height in the fixed supporting leg region inside development machine is inconsistent,
It can also keep horizontal by adjusting the height official post forward beam 107 of each supporting leg.
Optionally, on the basis of the above embodiments, supporting leg includes the sleeve 102 being fixedly connected with fixing seat 104 and set
The strut 101 being connected to inside sleeve 102, the side wall of sleeve 102 are equipped with through-hole, and are equipped in through-hole and can push 101 side of strut
The tight fixed bolt 103 of wall.Specifically, supporting leg includes sleeve 102 and strut 101, sleeve 102 is fixedly connected with fixing seat 104, branch
Bar 101 is set in inside sleeve 102, the i.e. controllable forward beam of length stretched out inside sleeve 102 by adjusting strut 101
107 height.In practical fixation procedure, through-hole is arranged in 102 side wall of sleeve, is equipped with tight fixed bolt 103 in through-hole, works as strut
After 101 adjust with 102 position of sleeve, screw rod end and strut 101 of the tight fixed bolt 103 up to tight fixed bolt 103 are screwed
Side wall offset, fix strut 101 with 102 position of sleeve.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Core drilling rig provided by the utility model is described in detail above.Specific case pair used herein
The principles of the present invention and embodiment are expounded, and the above embodiments are only used to help understand, and this is practical new
The method and its core concept of type.It is practical not departing from it should be pointed out that for those skilled in the art
Under the premise of new principle, several improvements and modifications can be made to this utility model, these improvement and modification also fall into this
In the protection scope of utility model claims.
Claims (10)
1. a kind of core drilling rig, including power head (111), which is characterized in that further include being capable of fixing consolidating inside development machine
Reservation (104) is removably provided with bar shaped forward beam (107) on the fixing seat (104), sets on the forward beam (107)
There is the bracket for being fixedly connected with the power head (111), and the bracket is slidably connected with the forward beam (107).
2. core drilling rig according to claim 1, which is characterized in that the lateral wall of the lower part of the forward beam (107) is set
There is the first protrusion；The outside of the forward beam (107) is equipped with clamping plate (105), and the clamping plate (105) is equipped with can be with described first
First card slot of protrusion fitting, to adjust the position of the forward beam (107) along its length；The clamping plate (105) passes through
First bolt (106) is connect with the fixing seat (104).
3. core drilling rig according to claim 2, which is characterized in that the top of the forward beam (107) is equipped with sliding rail, institute
State bracket include can be along the sliding block (108) that the sliding rail moves；The forward beam (107) is equipped with the U-lag of notch upward, and institute
State the driving portion being equipped in U-lag for driving the sliding block (108) mobile.
4. core drilling rig according to claim 3, which is characterized in that the sliding rail be set on the forward beam (107) outside
Second protrusion of side wall, the sliding block (108), which is equipped with, to further include along the second card slot of the second protrusion sliding, the bracket
Supporting plate (110) for being fixedly connected with the power head (111), the supporting plate (110) and the sliding block (108) pass through second
Bolt (109) connection.
5. core drilling rig according to claim 4, which is characterized in that the nut of first bolt (106) and/or described
The nut of second bolt (109) is eccentric nut.
6. core drilling rig according to claim 4, which is characterized in that the driving portion includes and the forward beam (107)
The propelling cylinder being fixedly connected, the piston of the propelling cylinder are equipped with pulley, and the peripheral pulley is equipped with and the supporting plate (110)
The tractive unit being fixedly connected.
7. core drilling rig described in any one according to claim 1~6, which is characterized in that fixing seat (104) lower end is set
There is telescopic supporting leg, to adjust the height of the forward beam (107).
8. core drilling rig according to claim 7, which is characterized in that the supporting leg includes solid with the fixing seat (104)
Surely the sleeve (102) connected and the strut (101) being socketed on inside the sleeve (102), the side wall of the sleeve (102) are equipped with
Through-hole, and the tight fixed bolt (103) that can push the strut (101) side wall is equipped in the through-hole.
9. core drilling rig according to claim 7, which is characterized in that the deslagging pump (4) of the core drilling rig, control section
(2), power section (3) is flexibly connected by pipeline, to adjust installation site.
10. core drilling rig according to claim 9, which is characterized in that the pumping plant (32) of the power section (3) is hydraulic
Pumping plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821704036.8U CN209011781U (en) | 2018-10-19 | 2018-10-19 | A kind of core drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821704036.8U CN209011781U (en) | 2018-10-19 | 2018-10-19 | A kind of core drilling rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209011781U true CN209011781U (en) | 2019-06-21 |
Family
ID=66839332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821704036.8U Active CN209011781U (en) | 2018-10-19 | 2018-10-19 | A kind of core drilling rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209011781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025878A (en) * | 2018-10-19 | 2018-12-18 | 中国铁建重工集团有限公司 | A kind of core drilling rig |
-
2018
- 2018-10-19 CN CN201821704036.8U patent/CN209011781U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025878A (en) * | 2018-10-19 | 2018-12-18 | 中国铁建重工集团有限公司 | A kind of core drilling rig |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101832102B (en) | Movable two-platform partitioned four-arm hanging wall anchor rod and anchor cable construction drill carriage | |
| CN101832103B (en) | Movable two-arm hanging wall anchor rod and anchor cable construction drill carriage | |
| CN100559013C (en) | Tunneling, anchoring and drilling composite machine | |
| CN107461197A (en) | A kind of drop shaft sinking shaft excavation machine and its construction method | |
| CN102278110A (en) | Movable two-arm of lifting platform hanging wall anchor rod and anchor cable construction drill carriage | |
| CN109630126A (en) | A kind of rotary shaft excavation machine of sinking method | |
| CN102654060A (en) | Tunnel excavation staggered type supporting device | |
| CN104712333A (en) | Large-width one-step roadway formation roadway rapid excavation technology | |
| CN109779525A (en) | Major diameter self- steering horizontal drill | |
| CN104533408A (en) | Large-width comprehensive coal road driving anchor machine with simultaneous drifting function | |
| CN202055821U (en) | Two-arm top slope anchor rod and anchor rope construction drill wagon with movable lifting platform | |
| CN209011781U (en) | A kind of core drilling rig | |
| CN209604053U (en) | Combined bolting and shotcrete operation rock bolting jumbo | |
| CN204386597U (en) | The coal road comprehensive dig-anchor machine of large width simultaneous drifting | |
| CN109025878A (en) | A kind of core drilling rig | |
| CN206860205U (en) | A kind of platform mechanical arm of bow member installation chassis | |
| CN101845952B (en) | Movable three-arm top-assisting anchor rod and anchor cable construction drill carriage | |
| CN110513117B (en) | Mode switching device of double-mode shield screw machine and using method | |
| CN201635656U (en) | Side-propping anchor rod-anchor cable construction drill carriage with three movable arms | |
| CN103016019A (en) | Heading and anchoring integrated machine | |
| CN205400768U (en) | Anchor rope integration platform truck | |
| CN201265354Y (en) | Light full-hydraulic core drilling rig | |
| CN209761335U (en) | Horizontal directional drilling machine | |
| CN114855772A (en) | Dual-purpose jacking equipment for inclined and straight piles | |
| CN201635655U (en) | Side-propping anchor rod-anchor cable construction drill carriage with two movable arms |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410100 No. 88 East 7 Line, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: China Railway Construction Heavy Industry Group Co., Ltd. Address before: 410100 No. 88 East 7 Line, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee before: China Railway Construction Heavy Industry Co.,Ltd. |