CN110344338A - A kind of bridge in-site installation jacking transferring equipment - Google Patents

A kind of bridge in-site installation jacking transferring equipment Download PDF

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Publication number
CN110344338A
CN110344338A CN201910744433.0A CN201910744433A CN110344338A CN 110344338 A CN110344338 A CN 110344338A CN 201910744433 A CN201910744433 A CN 201910744433A CN 110344338 A CN110344338 A CN 110344338A
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CN
China
Prior art keywords
bridge
plate
cylinder
support base
site installation
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
Application number
CN201910744433.0A
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Chinese (zh)
Inventor
白红波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Henglu Steel Structure Engineering Co Ltd
Original Assignee
Chongqing Henglu Steel Structure Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Henglu Steel Structure Engineering Co Ltd filed Critical Chongqing Henglu Steel Structure Engineering Co Ltd
Priority to CN201910744433.0A priority Critical patent/CN110344338A/en
Publication of CN110344338A publication Critical patent/CN110344338A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a kind of bridge in-site installation jacking transferring equipment, lift cylinders, Translation cylinder and support base including base and on base, the lifting pin of lift cylinders moves up and down along the vertical direction, and the telescopic rod of Translation cylinder is connect with support base drives support base to move back and forth with close or separate lift cylinders;The top of support base is the first supporting surface, the top of lifting pin is equipped with the second supporting surface, when the lifting pin of lift cylinders retracts downwards, the height of first supporting surface is higher than the height of the second supporting surface, when the lifting pin of lift cylinders stretches out fully up, the height of the first supporting surface is lower than the height of the second supporting surface.Pushing tow when a kind of bridge in-site installation jacking transferring equipment of the present invention is installed for bridge, elapses bridge to the other side from the side of gantry through bridge pier step by step, not will cause and suspends traffic or Navigation in Navigable.

Description

A kind of bridge in-site installation jacking transferring equipment
Technical field
The invention belongs to bridge mounting technique fields, and in particular to a kind of bridge in-site installation jacking transferring equipment.
Background technique
In civil engineering bridge construction, need to install the prefabricated mixed of various cross-lines, the highway in cross a river road and municipal works Solidifying soil bridge and Steel Bridge, and require to be installed under conditions of uninterrupted traffic and Navigation in Navigable.To meet above-mentioned requirements, The erection of highway, railroad bridge mostly uses incremental launching method to realize at present, it is therefore desirable to design a special equipment to realize to bridge Jacking passage.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of bridge in-site installation jacking transferring equipment.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of bridge in-site installation jacking transferring equipment of the present invention, it is lift cylinders including base and on base, flat It moves cylinder and support base, the lifting pin of lift cylinders moves up and down along the vertical direction, the telescopic rod of Translation cylinder connect drive with support base Support base moves back and forth with close or separate lift cylinders;The top of support base is the first supporting surface, and the top of lifting pin is equipped with Second supporting surface, when the lifting pin of lift cylinders retracts downwards, the height of the first supporting surface is higher than the height of the second supporting surface, when When the lifting pin of lift cylinders stretches out fully up, the height of the first supporting surface is lower than the height of the second supporting surface.
Further, be equipped with a pair of of closed slide on base, the upper surface of guide rail is plane, the bottom of support base with lead Rail is slidably matched.
Further, the track groove of a pair of parallel indent is equipped on base, the lower containment of guide rail is led in track groove The upper surface of rail is protruding upward with respect to the upper surface of base.
Further, the quadrate support frame of a side opening is equipped with below lift cylinders, the cylinder body end of Translation cylinder is mounted on branch It in support frame, is connect after the telescopic rod horizontal extension of Translation cylinder with support base, support base is driven to slidably reciprocate on guide rail.
Further, it is equipped with screw thread in the outer surface of cylinder block of Translation cylinder, is correspondingly provided with threaded hole on institute's support frame, translated Cylinder, which is connected through a screw thread, to be mounted on support frame.
Further, Translation cylinder is hydraulic cylinder, and the oil inlet of Translation cylinder is set to the telescopic rod outer end center of Translation cylinder, and Axle center along telescopic rod is penetrated through to cylinder body.
Further, support base includes that bottom plate, the first bearing plate of muti-piece, the second bearing plate of muti-piece and top plate, bottom plate are set to Bottom is simultaneously slidably matched with guide rail, and the first bearing plate interval vertical is set on the bottom plate, be located at intermediate two piece of first bearing plate it Between be equipped with connecting plate, the telescopic rod end of Translation cylinder is fixedly connected with connecting plate;Second bearing plate is set to above the first bearing plate, And opposite first bearing plate intersecting vertical;Top plate is set to the top of the second bearing plate.
It further, further include correction executing mechanism, correction executing mechanism includes mounting base and passage cylinder, and mounting base is set to The side of support base, passage cylinder are mounted in mounting base, elapse the telescopic rod telescopic direction of cylinder and the telescopic direction phase of Translation cylinder Vertically.It is equipped with fixed plate on the first bearing plate, is fixedly connected below the second bearing plate equipped with slide plate, in the slide plate bottom Equipped with a pair of smooth rail, elapses the telescopic rod of cylinder and slide plate is connect to push slide plate together with the second bearing plate in fixed plate or so Movement carries out fine position, to carry out positional deviation correction to ajust the Bridge position being held on above support base.
Further, further include a pair of of postive stop baffle, postive stop baffle be set to base two sides and with the extending direction of guide rail one It causes, the cross sectional shape of postive stop baffle forms a spacing breach in inverted L-shaped, and the two sides cooperation limit of bottom plate is in spacing breach It is interior, and gap is preset between the two sides and postive stop baffle of bottom plate.
It further, further include hydraulic station, hydraulic station is connect with lift cylinders and Translation cylinder respectively.
The beneficial effects of the present invention are: when a kind of bridge in-site installation jacking transferring equipment of the present invention is installed for bridge Pushing tow, elapse bridge to the other side from the side of gantry through bridge pier step by step, not will cause and suspend traffic or navigation channel is logical Boat.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out Illustrate:
Fig. 1 is a kind of bridge in-site installation jacking transferring equipment stereoscopic schematic diagram of the present invention.
Fig. 2 is a kind of stereoscopic schematic diagram at another visual angle of bridge in-site installation jacking transferring equipment of the invention.
Fig. 3 is that a kind of bridge in-site installation jacking transferring equipment of the present invention hides the schematic diagram after support base.
Fig. 4 is the structural representation that a kind of bridge in-site installation jacking transferring equipment of the present invention includes after correction executing mechanism Figure.
Fig. 5 is slide plate bottom substance schematic diagram.
In figure, 1 is base, and 2 be lift cylinders, and 3 be Translation cylinder, and 4 be support base, and 5 be guide rail, and 6 be support frame, and 40 be bottom Plate, 41 be the first bearing plate, and 42 be the second bearing plate, and 43 be top plate, and 44 be connecting plate, and 7 be postive stop baffle, and 8 be hydraulic station, 9 It is mounting base for correction executing mechanism, 90,91 be passage cylinder, and 92 be fixed plate, and 93 be smooth rail, and 94 be slide plate.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with It better understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1 to Figure 3, a kind of bridge in-site installation jacking transferring equipment of the present invention, including base 1 and be set to Lift cylinders 2, Translation cylinder 3 and support base 4, the lifting pin of lift cylinders 2 on base 1 move up and down along the vertical direction, Translation cylinder 3 Telescopic rod is connect with support base 4 drives support base 4 to move back and forth with close or separate lift cylinders 2.The top of support base 4 is the The top of one supporting surface, lifting pin is equipped with the second supporting surface, is used to support bridge.When the lifting pin of lift cylinders 2 retracts downwards, The height of first supporting surface is higher than the height of the second supporting surface, when the lifting pin of lift cylinders 2 stretches out fully up, the first support The height in face is lower than the height of the second supporting surface.
A pair of of closed slide 5 is equipped on base 1, the upper surface of guide rail 5 is plane, and as flat guide rail is metal Material, such as steel are made, and guide rail 5 is designed as flat guide and plays vital work for jacking and pushing bridge is better achieved With.The bottom of support base 4 is slidably matched with guide rail 5, i.e., the bottom of support base 4 directly contacts to form hard sliding friction with guide rail 5, By the plane contact being designed as guide rail 5 between support base 4, it can enter to avoid stone, iron filings of erecting bed etc. and lead Between rail 5 and support base 4 that its is stuck, there is a phenomenon where movement is unsmooth;When guide rail 5 is worn, it is conveniently replaced.
The track groove of a pair of parallel indent is equipped on base 1, the lower containment of guide rail 5 in track groove, guide rail 5 it is upper Surface is protruding upward with respect to the upper surface of base 1.
The quadrate support frame 6 of a side opening is equipped with below lift cylinders 2, the cylinder body end of Translation cylinder 3 is mounted on support frame 6 It is interior, it is connect after the telescopic rod horizontal extension of Translation cylinder 3 with support base 4, support base 4 is driven to slidably reciprocate on guide rail 5.
It is equipped with screw thread in the outer surface of cylinder block of Translation cylinder 3, threaded hole is correspondingly provided on institute's support frame 6, Translation cylinder 3 passes through Threaded connection is mounted on support frame 6, by said structure design, while meeting requirement and guaranteeing structural strength, It can simplify device structure.
In the present embodiment, Translation cylinder 3 is hydraulic cylinder, and the oil inlet of Translation cylinder 3 is set to the telescopic rod outer end of Translation cylinder 3 Portion center, and penetrate through along the axle center of telescopic rod to cylinder body.By designing oil inlet in telescopic rod end, it is ensured that translation The stroke of cylinder 3 is unaffected, can also influence to avoid oil circuit to telescopic rod, support base 4.
Support base 4 includes that bottom plate 40, the first bearing plate of muti-piece 41, the second bearing plate of muti-piece 42 and top plate 43, bottom plate 40 are set It is slidably matched in bottom and with guide rail 5,41 interval vertical of the first bearing plate is set on bottom plate 40, is held being located at intermediate two piece first Connecting plate 44 is equipped between weight plate 41, the telescopic rod end of Translation cylinder 3 is fixedly connected with connecting plate 44;Second bearing plate 42 is set to First bearing plate, 41 top, and opposite first bearing plate, 41 intersecting vertical, to can be saved while guaranteeing support strength Material;Top plate 43 is set to the top of the second bearing plate 42.
A kind of bridge in-site installation jacking transferring equipment of the present invention further includes correction executing mechanism 9, and correction executing mechanism 9 wraps Mounting base 90 and passage cylinder 91 are included, mounting base 90 is set to the side of support base 4, and passage cylinder 91 is mounted in mounting base 90, elapses The telescopic rod telescopic direction and the telescopic direction of Translation cylinder 3 of cylinder 91 are perpendicular;Fixed plate 92 is equipped on the first bearing plate 41.? It is fixedly connected below second bearing plate 42 equipped with slide plate 94, is equipped with a pair of smooth rail 93, as flat cunning in 94 bottom of slide plate Rail, the setting direction of the setting direction of smooth rail 93 perpendicular to guide rail 5.The telescopic rod of passage cylinder 91 is connect with slide plate 93 to push Slide plate 93 is moved left and right in fixed plate 92 together with the second bearing plate 42 to carry out positional deviation correction, is held on support base 4 to ajust The Bridge position of top.Slide plate 94 is slidably matched by smooth rail 93 with fixed plate 4, and driving mechanism 1 drives slide plate 5 and slide plate The second support plate 6 on 5, top plate 7 move back and forth in fixed plate 92, to realize the deviation-correcting function to Bridge position.Specifically Ground is equipped with a pair of guide rails slot in the bottom of slide plate 94, and level gauge 93 is set in guide-track groove and the bottom convex of opposite slide plate 94 Out, to be slidably matched with fixed plate 92, simultaneously as by Guide Rail Design be it is flat, can stone, iron to avoid erecting bed Bits etc. enter it is between guide rail and fixed plate that its is stuck, occur to move it is unsmooth, and also just when guide rail is worn In replacement.
A kind of bridge in-site installation jacking transferring equipment of the present invention further includes a pair of of postive stop baffle 7 for preventing support base 4 It turns on one's side in sliding, postive stop baffle 7 is set to 1 two sides of base and, section of postive stop baffle 7 consistent with the extending direction of guide rail 5 Face shape forms a spacing breach in inverted L-shaped, and the two sides cooperation limit of bottom plate 40 is in spacing breach, and the two of bottom plate 40 Gap is preset between side and postive stop baffle 7 in order to positional deviation correction.
A kind of bridge in-site installation jacking transferring equipment of the present invention further includes hydraulic station 8, hydraulic station 8 respectively with lift cylinders 2 It is connected with Translation cylinder 3, to control the work of lift cylinders 2 and Translation cylinder 3.Hydraulic station 8, lift cylinders 2 and the translation of present embodiment Internal structure, control method, the working principle of cylinder 3 itself can use common technology, and details are not described herein again.
The present invention a kind of working principle or the course of work of bridge in-site installation jacking transferring equipment are as follows: when original state, The lifting pin of lift cylinders 2 is in upward ejection state and supports bridge, when support base 4 moves close to lift cylinders 2, lifting pin It moves down, lifting pin is detached from bridge at this time, supports bridge by support base 4;Translation cylinder 3 pushes support base 4 mobile, that is, pushes support Seat 4 far from lift cylinders 2, then realizes the pushing tow of bridge together with bridge.When support base 4 it is mobile in place when, lift cylinders 2 at this time Lifting pin ejects again up, and Translation cylinder 3 retracts support base 4, recycles the above movement, realizes the passage of bridge.Actual installation When, need to lay multiple transfer equipment on single bridge pier, the pushing tow of bridge is completed in common cooperation, to be gradually completing bridge Installation suspends traffic or Navigation in Navigable without will cause.
Pushing tow when a kind of bridge in-site installation jacking transferring equipment of the present invention is installed for bridge, make bridge step by step from The side of gantry is elapsed through bridge pier to the other side, not will cause and is suspended traffic or Navigation in Navigable.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention Protection scope within.Protection scope of the present invention is subject to claims.
In the description of the present invention, it is to be understood that, if occur term " center ", " longitudinal direction ", " transverse direction ", "upper", The orientation or position of the instructions such as "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage Solution is limitation of the present invention.In addition, being used for description purposes only if there is term " first ", " second " etc., and cannot understand For indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ", The feature of " second " etc. can explicitly or implicitly include one or more of the features.In the description of the present invention, it removes Non- to be otherwise noted, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, if there is term " peace Dress ", " connected ", " connection ", shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or one Ground connection;It can be mechanical connection, be also possible to be electrically connected;It can be directly connected, the indirect phase of intermediary can also be passed through Even, it can be the connection inside two elements.For the ordinary skill in the art, can be understood by concrete condition The concrete meaning of above-mentioned term in the present invention.

Claims (10)

1. a kind of bridge in-site installation jacking transferring equipment, it is characterised in that: the liter including base and on the base Drop cylinder, Translation cylinder and support base, the lifting pin of the lift cylinders move up and down along the vertical direction, the telescopic rod of the Translation cylinder with The support base connection drives the support base to move back and forth with the close or separate lift cylinders;The top of the support base Top for the first supporting surface, the lifting pin is equipped with the second supporting surface, when the lifting pin of the lift cylinders retracts downwards, institute The height for stating the first supporting surface is higher than the height of second supporting surface, when the lifting pin of the lift cylinders stretches out fully up When, the height of first supporting surface is lower than the height of second supporting surface.
2. bridge in-site installation jacking transferring equipment according to claim 1, it is characterised in that: be equipped on the base The upper surface of a pair of of closed slide, the guide rail is plane, and the bottom of the support base is slidably matched with the guide rail.
3. bridge in-site installation jacking transferring equipment according to claim 2, it is characterised in that: be equipped on the base The track groove of a pair of parallel indent, the lower containment of the guide rail is in the track groove, and the upper surface of the guide rail is with respect to institute The upper surface for stating base is protruding upward.
4. bridge in-site installation jacking transferring equipment according to claim 2, it is characterised in that: below the lift cylinders Quadrate support frame equipped with a side opening, the cylinder body end of the Translation cylinder are mounted in the support frame, and the Translation cylinder is stretched It is connect after contracting bar horizontal extension with the support base, the support base is driven to slidably reciprocate on the guide rail.
5. bridge in-site installation jacking transferring equipment according to claim 4, it is characterised in that: in the cylinder of the Translation cylinder External surface is equipped with screw thread, is correspondingly provided with threaded hole on institute's support frame, the Translation cylinder be connected through a screw thread be mounted on it is described On support frame.
6. bridge in-site installation jacking transferring equipment according to claim 5, it is characterised in that: the Translation cylinder is hydraulic Cylinder, the oil inlet of the Translation cylinder are set to the telescopic rod outer end center of the Translation cylinder, and along the axle center of telescopic rod penetrate through to In cylinder body.
7. bridge in-site installation jacking transferring equipment according to claim 1, it is characterised in that: the support base includes bottom Plate, the first bearing plate of muti-piece, the second bearing plate of muti-piece and top plate, the bottom plate are set to bottom and are slidably matched with the guide rail, The first bearing plate interval vertical is set on the bottom plate, is equipped with connecting plate being located between intermediate two piece of first bearing plate, The telescopic rod end of the Translation cylinder is fixedly connected with the connecting plate;Second bearing plate is set on first bearing plate Side, and the relatively described first bearing plate intersecting vertical;The top plate is set to the top of second bearing plate.
8. bridge in-site installation jacking transferring equipment according to claim 7, it is characterised in that: further include correction execution machine Structure, the correction executing mechanism include mounting base and passage cylinder, and the mounting base is set to the side of the support base, the passage Cylinder is mounted in the mounting base, and the telescopic rod telescopic direction of the passage cylinder and the telescopic direction of Translation cylinder are perpendicular;Institute The first bearing plate is stated equipped with fixed plate, is fixedly connected below second bearing plate equipped with slide plate, in the slide plate bottom Equipped with a pair of smooth rail, the telescopic rod of the passage cylinder is connect to push the slide plate together with second load-bearing with the slide plate Plate is moved left and right in the fixed plate to carry out positional deviation correction.
9. bridge in-site installation jacking transferring equipment according to claim 7, it is characterised in that: further include a pair of of limiting block Plate, the postive stop baffle are set to the base two sides and, the section of the postive stop baffle consistent with the extending direction of the guide rail Shape forms a spacing breach in inverted L-shaped, and the two sides cooperation limit of the bottom plate is in the spacing breach, and the bottom Gap is preset between the two sides of plate and the postive stop baffle.
10. bridge in-site installation jacking transferring equipment according to claim 1 to 9, it is characterised in that: also wrap Hydraulic station is included, the hydraulic station is connect with the lift cylinders and the Translation cylinder respectively.
CN201910744433.0A 2019-08-13 2019-08-13 A kind of bridge in-site installation jacking transferring equipment Pending CN110344338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910744433.0A CN110344338A (en) 2019-08-13 2019-08-13 A kind of bridge in-site installation jacking transferring equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910744433.0A CN110344338A (en) 2019-08-13 2019-08-13 A kind of bridge in-site installation jacking transferring equipment

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CN110344338A true CN110344338A (en) 2019-10-18

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CN201910744433.0A Pending CN110344338A (en) 2019-08-13 2019-08-13 A kind of bridge in-site installation jacking transferring equipment

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111395164A (en) * 2020-01-16 2020-07-10 中铁二十四局集团浙江工程有限公司 Steel box girder pushing structure for bridge construction
CN114043201A (en) * 2021-11-16 2022-02-15 中车长江车辆有限公司 Motor press-fitting device
CN115259009A (en) * 2022-07-21 2022-11-01 中国十七冶集团有限公司 Jacking device suitable for old district transformation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103924521A (en) * 2014-04-14 2014-07-16 上海市机械施工集团有限公司 Rectifying device used for mounting elevated frames and bridges and rectifying method of rectifying device
KR101689028B1 (en) * 2016-01-25 2016-12-23 주식회사 특수건설 transporter for bridge construction
KR101692028B1 (en) * 2015-09-11 2017-01-03 박종협 The accumulated box type of rail transporter and the rapid ballast bridge replacement method
CN208733477U (en) * 2017-12-25 2019-04-12 中铁二局第五工程有限公司 A kind of large-tonnage steel box beam thrustor and pushing tow system
CN209039980U (en) * 2018-08-21 2019-06-28 沈阳嘉奇液压科技有限公司 A kind of bridge incremental launching machine
CN210946505U (en) * 2019-08-13 2020-07-07 重庆恒庐钢结构工程有限公司 Jacking transfer equipment for on-site bridge installation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103924521A (en) * 2014-04-14 2014-07-16 上海市机械施工集团有限公司 Rectifying device used for mounting elevated frames and bridges and rectifying method of rectifying device
KR101692028B1 (en) * 2015-09-11 2017-01-03 박종협 The accumulated box type of rail transporter and the rapid ballast bridge replacement method
KR101689028B1 (en) * 2016-01-25 2016-12-23 주식회사 특수건설 transporter for bridge construction
CN208733477U (en) * 2017-12-25 2019-04-12 中铁二局第五工程有限公司 A kind of large-tonnage steel box beam thrustor and pushing tow system
CN209039980U (en) * 2018-08-21 2019-06-28 沈阳嘉奇液压科技有限公司 A kind of bridge incremental launching machine
CN210946505U (en) * 2019-08-13 2020-07-07 重庆恒庐钢结构工程有限公司 Jacking transfer equipment for on-site bridge installation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111395164A (en) * 2020-01-16 2020-07-10 中铁二十四局集团浙江工程有限公司 Steel box girder pushing structure for bridge construction
CN114043201A (en) * 2021-11-16 2022-02-15 中车长江车辆有限公司 Motor press-fitting device
CN114043201B (en) * 2021-11-16 2023-01-17 中车长江车辆有限公司 Motor press-fitting device
CN115259009A (en) * 2022-07-21 2022-11-01 中国十七冶集团有限公司 Jacking device suitable for old district transformation

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