CN107503374A - A kind of piping lane Operation Van - Google Patents
A kind of piping lane Operation Van Download PDFInfo
- Publication number
- CN107503374A CN107503374A CN201710730017.6A CN201710730017A CN107503374A CN 107503374 A CN107503374 A CN 107503374A CN 201710730017 A CN201710730017 A CN 201710730017A CN 107503374 A CN107503374 A CN 107503374A
- Authority
- CN
- China
- Prior art keywords
- trestle
- collateral
- piping lane
- side plate
- operation van
- 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
Links
- 238000005065 mining Methods 0.000 claims abstract description 13
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 230000007704 transition Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000001737 promoting effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention discloses a kind of piping lane Operation Van, mining head including collateral protecting system, on front side of the collateral protecting system and the propulsion system installed in the collateral protecting system rear side for the propulsion collateral protecting system advance, the trestle for vehicle to run is provided with the upside of the collateral protecting system, the width of the trestle is consistent with the width of target driving foundation ditch so that the vehicle at left and right sides of the target driving foundation ditch can be walked from the trestle.In the piping lane Operation Van, because trestle is provided with collateral protecting system, to do the bridge of foundation ditch or so transition, with when the piping lane Operation Van jaywalks and excavates foundation ditch, because excavation speed is slow, even if trestle slightly moves, vehicle can be still set to be passed through from trestle, can be excavated on the basis of vehicle to run is not influenceed.In summary, the piping lane Operation Van, which can efficiently solve, excavates the problem of road surface foundation ditch influences to pass through.
Description
Technical field
The present invention relates to excavating equipment technical field, more specifically to a kind of piping lane Operation Van.
Background technology
At present both at home and abroad building for large-scale shallow underground structures mainly use cut and cover method, and gradually be evolved into lid digging with it is bright
The construction method that tunneling combines, but generally speaking cut and cover method is still main construction method in underground engineering construction.
In actual underground pipe gallery work progress, construction operation is typically carried out using cut and cover method.Opened as certain company is newest
Excavation formula uses the arrangement and method for construction that top cut and cover method is combined with lower rectangular shield method.Contrastingly, cut and cover method, which has, takes up an area
The inferior position that area is big, amount of demolition is big.And boundary of works area is big, it usually needs slope is excavated, and the requirement to place space is higher.Construction
Less efficient, engineering construction progress is generally relatively slow, and the influence to surrounding enviroment is also larger.Simultaneously very big pressure is brought to municipal traffic
Power, many hidden trouble of traffic be present, the problems such as noise pollution is serious, in cargo transport and nearby residents near construction infection at road
Normal traffic is current and lives.Fluting cut and cover method is generally difficult to adapt to the demand that piping lane crosses crossing, in work progress for a long time
Block traffic, take the problems such as large area place.
In summary, how to efficiently solve and excavate the problem of road surface foundation ditch influences to pass through, be current people in the art
Member's urgent problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of piping lane Operation Van, the piping lane Operation Van effectively to solve
Certainly excavating road surface foundation ditch influences the problem of current.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of piping lane Operation Van, including collateral protecting system, the mining head on front side of the collateral protecting system and installation
For promoting the propulsion system that the collateral protecting system advances on rear side of the collateral protecting system, the collateral protecting system it is upper
Side is provided with the trestle for vehicle to run, and the width of the trestle is consistent so that the target with the width of target driving foundation ditch
Vehicle at left and right sides of driving foundation ditch can walk from the trestle.
Preferably, it is provided with left and right sides of the trestle for riding over the folding at left and right sides of foundation ditch on road surface respectively
Plate.
Preferably, the folded plate is hinged with the trestle by front and rear extended jointed shaft.
Preferably, in addition to the drive system for driving the folded plate to rotate.
Preferably, the collateral protecting system includes base and is arranged on to be used for the side for propping up the left and right sides earthwork on the upside of base
Plate group, the side plate group include multiple side plates set gradually along the longitudinal direction, and each side plate stands up and can independently inclined
.
Preferably, the side plate is respectively arranged with left and right sides of the base, the plate face direction of the side plate is
Left and right directions.
Preferably, the lower end of each side plate is be hinged so that the upper end through-thickness of the side plate with the base
Rotate, the drive device for driving the side plate inwardly to rotate is provided with the inside of the side plate.
A kind of piping lane Operation Van provided by the invention, the piping lane Operation Van include collateral protecting system, mining head, propulsion system
And trestle.Wherein mining head is arranged on the front side of collateral protecting system, and wherein propulsion system is arranged on the rear side of collateral protecting system, with
For promoting collateral protecting system to advance, and then mining head is promoted to move on excavation.Wherein collateral protecting system, for supporting foundation ditch
The side wall of the left and right sides is to avoid left and right sidewall from caving in.Trestle is provided with the upside of collateral protecting system, trestle should be used for car
Walking.And the width of trestle is consistent with the width of target driving foundation ditch, so that the vehicle at left and right sides of target driving foundation ditch is equal
It can walk, even if the vehicle on the left of trestle can be opened on upper trestle from the earthwork, and walk after trestle, walking is arrived from trestle
In the earthwork of right side, and for can then enter positioned at the vehicle on right side from trestle on the road surface of left side.
According to above-mentioned technical scheme, it is recognised that in the application piping lane Operation Van, when vehicle to run is to foundation ditch, and
When needing to cross over foundation ditch to opposite side, now because trestle is provided with the upside of collateral protecting system, so that vehicle can lead to
Cross and walked from trestle, parallel to opposite side, so that vehicle can cross foundation ditch.In the piping lane Operation Van, because collateral
Trestle is provided with protecting system, to do the bridge of foundation ditch or so transition, with the piping lane Operation Van jaywalk excavate foundation ditch when,
Because excavation speed is slow, even if trestle slightly moves, vehicle can be still set to be passed through from trestle, so that vehicle can not influenceed
Excavated on the basis of walking.In summary, the piping lane Operation Van can efficiently solve excavation road surface foundation ditch and influence to pass through
The problem of.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the forward direction schematic diagram of piping lane Operation Van provided in an embodiment of the present invention；
Fig. 2 is the side schematic view of piping lane Operation Van provided in an embodiment of the present invention.
Marked in accompanying drawing as follows：
Mining head 1, propulsion system 2, base 3, side plate 4, trestle 5, cable 6, foundation ditch 7, folded plate 8.
Embodiment
The embodiment of the invention discloses a kind of piping lane Operation Van, influences current ask to efficiently solve excavation road surface foundation ditch
Topic.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-Fig. 2 is referred to, Fig. 1 is the forward direction schematic diagram of piping lane Operation Van provided in an embodiment of the present invention；Fig. 2 is this hair
The side schematic view for the piping lane Operation Van that bright embodiment provides.
In a kind of specific embodiment, a kind of piping lane Operation Van is present embodiments provided, the piping lane Operation Van includes collateral
Protecting system, mining head 1, propulsion system 2 and trestle 5.
Wherein mining head 1 is arranged on the front side of collateral protecting system, to continue to excavate the earthwork forward on front side of collateral protecting system,
To tunnel forward.Two mining heads 1 are typically set up in parallel in left-right direction in the front side of collateral protecting system to improve excavation speed.
It should be noted that wherein how mining head 1 specifically excavates the earthwork, prior art is may be referred to, will not be repeated here.It is general to go back
Slag-tapping system is provided with, the slag charge that mining head 1 is excavated conveys output.
Wherein propulsion system 2 is arranged on the rear side of collateral protecting system, for promoting collateral protecting system to advance, and then promotes
Mining head 1 moves on excavation.When general propulsion system 2 is pushed ahead, the propelling cylinder of rear side also needs to hold out against tube coupling.Need
Illustrate, the concrete structure of wherein propulsion system 2 may be referred to prior art, will not be repeated here.
Wherein collateral protecting system, for supporting the side wall at left and right sides of foundation ditch 7 to avoid left and right sidewall from caving in.Generally comprise
Base 3 and the upper side plate 4 for being arranged on base 3, prop up the left and right sides earthwork of foundation ditch 7, to avoid foundation ditch 7 or so by side plate 4
The earthwork landslide of both sides.It should be noted that the concrete structure of wherein collateral protecting system may be referred to prior art.
Trestle 5 is provided with the upside of collateral protecting system, trestle 5 should be used for vehicle to run.And the width and mesh of trestle 5
The width of mark driving foundation ditch 7 is consistent, so that the vehicle of the left and right sides of target driving foundation ditch 7 can walk from trestle 5, even if
The vehicle in the left side of trestle 5 can be opened from the earthwork on upper trestle 5, and is walked after trestle 5, walk onto the right side earthwork, and for
Vehicle positioned at right side can then enter on the road surface of left side from trestle 5.In order to set for convenience, trestle 5 can be made rectangular, when
So can also parallelogram or trapezoidal, it is only necessary to vehicle can left and right walk.The height of trestle 5 should be with object tape
It is consistent to tunnel the depth of foundation ditch 7, so that trestle 5 and the earthwork are contour, it is of course possible to it is slightly higher, can also be lower slightly, it is only necessary to vehicle energy
Enough run on trestle 5.
In the present embodiment, in the application piping lane Operation Van, when vehicle to run is to foundation ditch 7, and needing to cross over foundation ditch 7
During to opposite side, now because trestle 5 is provided with the upside of collateral protecting system, so that vehicle can be by wearing from trestle 5
OK, parallel to opposite side, so that vehicle can cross foundation ditch 7.In the piping lane Operation Van, because being set on collateral protecting system
Trestle 5, to do the bridge of the transition of foundation ditch 7 or so, with when the piping lane Operation Van jaywalks and excavates foundation ditch 7, because excavating
Speed is slow, even if trestle 5 slightly moves, vehicle is passed through from trestle 5, can not influence vehicle to run
On the basis of excavated.In summary, the piping lane Operation Van, which can efficiently solve excavation road surface foundation ditch 7, influences current ask
Topic.
Further, it is contemplated that the left and right sides of trestle 5 stretches out can not be too many, can influence pavement facilities.And in road
During Lu Zhongzuo bridges, stretch out difference, and wheel will be pressed onto the boundary of foundation ditch 7, and border soil is more loose, even if there is protection,
It may be pressurized and collapse.Based on this, preferably it is provided with herein in the left and right sides of trestle 5 for riding over foundation ditch 7 or so two respectively
Folded plate 8 on dypass face, vehicle is directed on trestle 5 by folded plate 8.Wherein the width of folded plate 8 can be with the width of trestle 5
Unanimously, in order that guiding effect is good, folded plate 8 is gradually thick from outside to inner side, thickness.It should be noted that wherein folded plate 8 and trestle
5 can be used and be detachably fixed connection, but dismount inconvenience, and based on this, preferred folded plate 8 is prolonged with trestle 5 by front and rear herein
The jointed shaft for stretching setting is hinged, so that folded plate 8 can turn to the inside to positioned at the surface of trestle 5, or even in stacked shape
State, and can be turned out to the parallel side-by-side of trestle 5 setting, to guide vehicle to enter on trestle 5.In order to easy to operate,
The drive system for driving folded plate 8 to rotate is also provided with, specifically, can also be in the left and right sides of folded plate 8 or centre
Drive system is set, and wherein drive system can be telescopic hydraulic cylinder, can also be other devices certainly, will not be repeated here.
In order to preferably comply with the movement of vehicle, and trestle 5 is set not move as far as possible.Trestle 5 can be made with collateral protecting system before
Rear is to being slidably connected.With when collateral protecting system small distance moves, and the trestle 5 will not move.
Further, consider when excavating foundation ditch 7, cable 6 is there may be on the downside of ground, and cable 6 can interfere collateral shield system
The advance of system, based on this, preferably collateral protecting system includes base 3 and set to be used to prop up left and right sides soil on the base 3 herein
The side plate group of side.And side plate group includes multiple side plates 4 set gradually along the longitudinal direction, wherein front and rear be set up in parallel, so that preceding
Rear is upward, and prop up the both sides earthwork of foundation ditch 7 is no longer one block of side plate 4, but polylith side plate 4.It should be noted that this polylith
Side plate 4 can be disposed adjacent successively or spacing a certain distance is set, but it should ensureing the support to earthwork side.
And each side plate 4 stands up and can independently toppled over, it is necessary to illustrate, side plate 4, which is stood up, refers to plate face perpendicular to water
Plane is set, and is at least approximately perpendicular to horizontal plane setting, and general plate face is set to left and right direction, so that plate face larger area
Offseted with the earthwork side of the both sides of foundation ditch 7.Side plate 4, and the left and right sides are preferably respectively arranged with the left and right sides of base 3 herein
Side plate be respectively held against the left and right sides of foundation ditch 7.And the plate face of side plate 4 is oriented left and right directions, so that plate face and the side of foundation ditch 7
Offset, now side plate 4 can inwardly be turned to and toppled over, so that front and rear side plate 4 will not interfere with each other when toppling over.
Further, control side plate 4 is stood up for convenience, and side plate 4 is toppled over setting, herein preferably, side for convenience
The lower end of plate 4 is be hinged with base 3 so that the upper end of side plate 4 can through-thickness rotate, even if side plate 4 can turn to
Tilt state, and the state of standing up can be turned to, control side plate 4 to rotate for convenience, to realize Automatic-dumping or erect, herein
It is preferred that the inner side of side plate 4 is provided with the drive device for driving the side plate inwardly to rotate.Further, in order to ensure side plate
4 intensity stood up, the side of side plate 4 can be provided with bearing diagonal device, it is necessary to explanation, because side plate 4 should can
Topple over, so bearing diagonal device should separate or transition state, to ensure that side plate 4 can topple over setting when needed.Specifically
Bearing diagonal device can be driving side plate 4 rotate drive device, such as telescopic hydraulic cylinder.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (7)
1. a kind of piping lane Operation Van, including collateral protecting system, the mining head on front side of the collateral protecting system and it is arranged on
The propulsion system advanced on rear side of the collateral protecting system for the propulsion collateral protecting system, it is characterised in that described collateral
The trestle for vehicle to run is provided with the upside of protecting system, the width one of the width and target driving foundation ditch of the trestle is shown
The vehicle at left and right sides of the target driving foundation ditch is set to be walked from the trestle.
2. piping lane Operation Van according to claim 1, it is characterised in that be provided with and be used at left and right sides of the trestle
The folded plate on road surface at left and right sides of foundation ditch is ridden over respectively.
3. piping lane Operation Van according to claim 2, it is characterised in that the folded plate passes through front and rear extension with the trestle
The jointed shaft of setting is hinged.
4. piping lane Operation Van according to claim 3, it is characterised in that also include being used for the drive for driving the folded plate to rotate
Dynamic system.
5. according to the piping lane Operation Van described in claim any one of 1-4, it is characterised in that the collateral protecting system includes base
Be used for the side plate group for propping up the left and right sides earthwork on the upside of the base with being arranged on, the side plate group include it is multiple along the longitudinal direction
The side plate set gradually, each side plate stand up and can independently toppled over.
6. piping lane Operation Van according to claim 5, it is characterised in that institute is respectively arranged with left and right sides of the base
Side plate is stated, the plate face direction of the side plate is left and right directions.
7. piping lane Operation Van according to claim 6, it is characterised in that the lower end of each side plate with the base
The upper end through-thickness rotation so that the side plate is hinged, is provided with the inside of the side plate for driving the side plate inside
The drive device of rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730017.6A CN107503374A (en) | 2017-08-23 | 2017-08-23 | A kind of piping lane Operation Van |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730017.6A CN107503374A (en) | 2017-08-23 | 2017-08-23 | A kind of piping lane Operation Van |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107503374A true CN107503374A (en) | 2017-12-22 |
Family
ID=60692569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710730017.6A Pending CN107503374A (en) | 2017-08-23 | 2017-08-23 | A kind of piping lane Operation Van |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107503374A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306550A (en) * | 2019-07-23 | 2019-10-08 | 江苏苏南建筑安装工程有限公司 | It is used to support the trestle device of jumbolter |
| CN113482046A (en) * | 2021-07-21 | 2021-10-08 | 中交二公局第六工程有限公司 | Pipe gallery segment installation construction system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529613A1 (en) * | 1982-07-05 | 1984-01-06 | Voest Alpine Ag | Wide tunnel or gallery driving sectioned hewing -involves two sections simultaneously alternately hewnand lined while mutually sealed |
| CN102966169A (en) * | 2012-12-12 | 2013-03-13 | 邹进昭 | Automatic baffle of foundation ditch |
| CN104674863A (en) * | 2015-02-26 | 2015-06-03 | 济南轨道交通集团有限公司 | Method for reinforcing existing municipal pipe gallery within deep foundation pit excavation range |
| CN205382940U (en) * | 2016-03-01 | 2016-07-13 | 中铁二局第四工程有限公司 | Self -propelled tunnel overlength inverted arch moving die plate steel case roof beam landing stage |
| CN106049532A (en) * | 2016-07-25 | 2016-10-26 | 中铁工程装备集团有限公司 | Supporting and retaining device for open excavation construction of comprehensive pipe gallery and construction method thereof |
| CN106869165A (en) * | 2017-02-20 | 2017-06-20 | 曾庆如 | City integrated prefabricated piping lane open cut formula is from construction of prevention work method and self-propelled laydown machine |
| CN207109857U (en) * | 2017-08-23 | 2018-03-16 | 中国铁建重工集团有限公司 | A kind of piping lane Operation Van |
-
2017
- 2017-08-23 CN CN201710730017.6A patent/CN107503374A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529613A1 (en) * | 1982-07-05 | 1984-01-06 | Voest Alpine Ag | Wide tunnel or gallery driving sectioned hewing -involves two sections simultaneously alternately hewnand lined while mutually sealed |
| CN102966169A (en) * | 2012-12-12 | 2013-03-13 | 邹进昭 | Automatic baffle of foundation ditch |
| CN104674863A (en) * | 2015-02-26 | 2015-06-03 | 济南轨道交通集团有限公司 | Method for reinforcing existing municipal pipe gallery within deep foundation pit excavation range |
| CN205382940U (en) * | 2016-03-01 | 2016-07-13 | 中铁二局第四工程有限公司 | Self -propelled tunnel overlength inverted arch moving die plate steel case roof beam landing stage |
| CN106049532A (en) * | 2016-07-25 | 2016-10-26 | 中铁工程装备集团有限公司 | Supporting and retaining device for open excavation construction of comprehensive pipe gallery and construction method thereof |
| CN106869165A (en) * | 2017-02-20 | 2017-06-20 | 曾庆如 | City integrated prefabricated piping lane open cut formula is from construction of prevention work method and self-propelled laydown machine |
| CN207109857U (en) * | 2017-08-23 | 2018-03-16 | 中国铁建重工集团有限公司 | A kind of piping lane Operation Van |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306550A (en) * | 2019-07-23 | 2019-10-08 | 江苏苏南建筑安装工程有限公司 | It is used to support the trestle device of jumbolter |
| CN113482046A (en) * | 2021-07-21 | 2021-10-08 | 中交二公局第六工程有限公司 | Pipe gallery segment installation construction system and method |
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| CB02 | Change of applicant information |
Address after: 410100 No. 88 East 7 Line, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Applicant after: China Railway Construction Heavy Industry Co.,Ltd. Address before: 410100 No. 88 Dongqi Road, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Applicant before: China Railway Construction Heavy Industry Co.,Ltd. |
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Application publication date: 20171222 |
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| RJ01 | Rejection of invention patent application after publication |