CN115387244B - Hanging basket internal mold for cantilever pouring construction - Google Patents
Hanging basket internal mold for cantilever pouring construction Download PDFInfo
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- CN115387244B CN115387244B CN202211048825.1A CN202211048825A CN115387244B CN 115387244 B CN115387244 B CN 115387244B CN 202211048825 A CN202211048825 A CN 202211048825A CN 115387244 B CN115387244 B CN 115387244B
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- moving guide
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000005266 casting Methods 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
- E01D21/105—Balanced cantilevered erection
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention discloses a hanging basket internal mold for cantilever pouring construction, which comprises a joint template and two internal mold units which are arranged oppositely, wherein each internal mold unit comprises an upper template and a side template, one side of the joint template is lapped on the upper template of one internal mold unit, and the other side of the joint template is lapped on the upper template of the other internal mold unit. According to the invention, two sides of the joint template are respectively lapped at the joint of the upper templates of the two inner mold units, so that a two-layer laminated structure is formed at the joint of the two inner mold units, the overall structure is simple, when the thickness of the web plate of the concrete continuous beam is changed, the transverse distance between the two inner mold units is correspondingly adjusted, the joint template can always meet the support of the joint gap, the use is convenient, the wood template is not required to be assembled, the time and the labor are saved, the cost is saved, the gap after the concrete continuous beam is formed is reduced, and the appearance quality is improved.
Description
Technical Field
The invention relates to bridge construction equipment, in particular to a hanging basket internal mold for cantilever pouring construction.
Background
Cantilever pouring construction refers to a construction method for pouring concrete beam bodies in a symmetrical and balanced way section by section to span way on two sides of a forward bridge taking a bridge pier as a center and applying prestress section by section. The cradle is special equipment which is used for bearing the self weight of the beam body and the construction load and can move forward section by section when the concrete beam body is poured by a cantilever method, and mainly comprises a main truss, an inner die and an outer die for forming the concrete beam body. When pouring, because the thickness of the concrete beam body web plate can change, the side templates of the inner die are required to be adjusted to the left and the right sides, and most of the side templates are manually adjusted at present, so that the workload is large, time and labor are wasted in adjustment, and the labor cost is high. After the position of the side template is determined, gaps are formed at the joints of the upper templates of the inner mold, the gaps are generally filled with wood templates at present, a bracket is erected below the wood templates for fixing, the operation space is limited, the required time is long, the appearance quality is not guaranteed due to the fact that the gaps of the templates are more favorable for guaranteeing, and the wood templates with different sizes are required to be prepared to meet the changed joint gaps.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art, and provides the hanging basket internal mold for cantilever casting construction, which has a simple structure, is beneficial to reducing joint gaps, and can always meet the support of the joint gaps when the thickness of a concrete beam web varies.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a cantilever pouring construction is with hanging basket centre form, includes joint template and two relative arrangement's centre form unit, the centre form unit includes cope match-plate pattern and side form board, joint template one side overlap joint in one of them on the cope match-plate pattern of centre form unit, the opposite side overlap joint in another on the cope match-plate pattern of centre form unit.
As a further improvement of the above technical scheme: the joint template, the upper template and the side templates are all steel templates.
As a further improvement of the above technical scheme: the cantilever pouring construction is with hanging basket centre form still including sideslip subassembly, sideslip subassembly includes sideslip guide beam and sideslip driving piece, the cope match-plate pattern below is equipped with the back of the body frame, go up back of the body frame slidable and locate on the sideslip guide beam, sideslip driving piece both ends respectively with two go up back of the body frame of centre form unit is connected.
As a further improvement of the above technical scheme: the side form is characterized in that a side back frame is arranged on the inner side of the side form, the side back frame is hinged with the upper back frame, and a die retracting driving piece for driving the side back frame to rotate is arranged on the upper back frame.
As a further improvement of the above technical scheme: the die-sinking driving piece is a die-sinking oil cylinder, one end of the die-sinking oil cylinder is hinged with the upper back frame, and the other end of the die-sinking oil cylinder is hinged with the side back frame.
As a further improvement of the above technical scheme: the transverse moving driving piece is a transverse moving oil cylinder, and two ends of the transverse moving oil cylinder are respectively hinged with the upper back frames of the two inner mold units.
As a further improvement of the above technical scheme: and the transverse guide beam is provided with a positioning stay bar, and the upper end of the positioning stay bar is connected with the joint template.
As a further improvement of the above technical scheme: the cantilever pouring construction is with hanging basket centre form still includes centre form hanging beam, indulges and moves the nose girder and be used for indulging the bracing cross beam that moves the nose girder and provide support, sideslip nose girder is located on the centre form hanging beam, be equipped with the centre form jib on the centre form hanging beam, indulge and move the nose girder with can slide relatively between the back frame.
As a further improvement of the above technical scheme: the longitudinal moving guide beam is an I-shaped section beam, and the upper back frame is provided with rollers on at least one side of the web plate of the longitudinal moving guide beam.
As a further improvement of the above technical scheme: the inner die hanging beam and the longitudinal moving guide beam are arranged in parallel.
Compared with the prior art, the invention has the advantages that: the hanging basket inner die for cantilever pouring construction comprises the joint die plates, wherein two sides of the joint die plates are respectively overlapped at the joint of the upper die plates of the two inner die units, so that a two-layer laminated structure is formed at the joint of the two inner die units, the whole structure is simple, when the thickness of a concrete continuous beam web is changed, the transverse distance between the two inner die units is correspondingly adjusted, the joint die plates can always meet the support of joint gaps, the use is convenient, the wooden die plates are not required to be assembled, the time and the labor are saved, the cost is saved, the gap after the concrete continuous beam is formed is reduced, and the appearance quality is improved.
Drawings
Fig. 1 is a schematic perspective view of a first state of an inner mold of a basket for cantilever casting construction according to the present invention.
Fig. 2 is a schematic perspective view of a second state of the inner mold of the basket for cantilever casting construction according to the present invention.
Fig. 3 is a schematic diagram of a front view structure of an inner mold of a hanging basket for cantilever casting construction.
The reference numerals in the drawings denote: 1. joining the templates; 2. an inner mold unit; 21. an upper template; 22. a side form; 23. an upper back frame; 231. a roller; 24. a side back frame; 25. a die-receiving driving piece; 3. a traversing assembly; 31. traversing the guide beam; 32. a traversing driving member; 33. positioning a stay bar; 4. an inner mold hanging beam; 41. an inner mold suspender; 5. longitudinally moving the guide beam; 7. and supporting the cross beam.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples.
Fig. 1 to 3 show an embodiment of a hanging basket internal mold for cantilever casting construction of the present invention, which includes a joint mold plate 1 and two internal mold units 2 arranged opposite to each other, the internal mold units 2 including an upper mold plate 21 and a side mold plate 22, one side of the joint mold plate 1 being overlapped on the upper mold plate 21 of one of the internal mold units 2, and the other side being overlapped on the upper mold plate 21 of the other internal mold unit 2.
The hanging basket inner mold for cantilever pouring construction of the embodiment comprises the joint mold plate 1, wherein the left side and the right side of the joint mold plate 1 are respectively overlapped at the joint of the upper mold plates 21 of the left and the right inner mold units 2, so that a two-layer laminated structure is formed at the joint of the two inner mold units 2, the whole structure is simple, when the thickness of a web plate of a concrete continuous beam changes, the transverse distance (see fig. 3, namely the transverse direction or the width direction of the concrete continuous beam; and correspondingly, the longitudinal direction is the front and the rear direction or the length direction of the concrete continuous beam) of the two inner mold units 2 is correspondingly adjusted, the joint mold plate 1 can always meet the support of a joint gap, the use is convenient, the wooden mold plate is not required to be assembled, the time and the labor are saved, the cost is also facilitated to be reduced, and the gap after the concrete continuous beam is formed is improved, and the appearance quality is improved.
As a preferred embodiment, since the joint form 1 and the upper form 21 are formed in a lap joint laminated structure without repeated assembly, the joint form 1 may be formed by steel forms as the upper form 21 and the side forms 22.
Further, in this embodiment, the hanging basket inner mold for cantilever pouring construction further includes a lateral movement assembly 3, the lateral movement assembly 3 includes a lateral movement guide beam 31 and a lateral movement driving member 32, an upper back frame 23 is disposed below the upper mold plate 21, the upper back frame 23 is slidably disposed on the lateral movement guide beam 31, and two ends of the lateral movement driving member 32 are respectively connected with the upper back frames 23 of the two inner mold units 2. When the thickness of the web of the concrete continuous beam changes, correspondingly, the transverse distance between the two inner mold units 2 needs to be adjusted, at the moment, the transverse moving driving piece 32 acts to drive the upper back frames 23 of the two inner mold units 2 to be far away from (or close to) each other, the transverse moving guide beam 31 provides a guiding function for the upper back frames 23, the position deviation of the upper back frames 23 is avoided, the upper mold plates 21, the side mold plates 22 and the like integrally move along the transverse direction along the upper back frames 23, the adjusting process is convenient and labor-saving, and manual adjustment is not needed.
As a preferred embodiment, the traversing driving member 32 may employ a traversing cylinder, which is mature in technology, reliable and low in cost, and capable of providing a sufficient traversing driving force; the two ends of the traversing cylinder are respectively hinged with the upper back frames 23 of the two inner mold units 2, which is beneficial to ensuring smooth traversing action of the upper back frames 23 and avoiding clamping stagnation. Of course, in other embodiments, other components may be used for the traversing drive 32.
Further, in this embodiment, a side back frame 24 is provided on the inner side of the side form 22, the side back frame 24 is hinged to an upper back frame 23, and a mold retracting driving member 25 for driving the side back frame 24 to rotate is provided on the upper back frame 23. In the pouring process, the mold collecting driving piece 25 can provide a certain support for the side back frame 24, so that the side back frame 24 and the side mold plate 22 are prevented from being shifted; after pouring is completed, the die-collecting driving piece 25 drives the side back frame 24 and the side die plate 22 to rotate inwards, so that the die-collecting driving piece is separated from the concrete continuous beam, and quick die-stripping is realized, and the die-collecting device is simple and effective in structure.
In this embodiment, the mold-retracting driving member 25 is a mold-retracting cylinder, which has mature technology, good reliability and low cost, and can provide sufficient rotational driving force, one end of the mold-retracting cylinder is hinged to the upper back frame 23, and the other end is hinged to the side back frame 24, so that smooth lateral movement of the side back frame 24 is ensured, and jamming is avoided. Of course, in other embodiments, other components may be used for the mold closing drive 25.
As a preferred embodiment, the traversing guide beam 31 is provided with a positioning stay 33, and the upper end of the positioning stay 33 is connected with the joint template 1. The positioning stay bars 33 can provide positioning and supporting functions for the joint templates 1, ensure the accurate positions of the joint templates 1 and avoid left and right offset.
Further, in this embodiment, the hanging basket inner mold for cantilever pouring construction further includes an inner mold hanging beam 4, a longitudinally moving guide beam 5, and a supporting beam 7 for providing support for the longitudinally moving guide beam 5 (preferably, the supporting beam 7 is a front upper beam of the hanging basket), the transversely moving guide beam 31 is disposed on the inner mold hanging beam 4, an inner mold hanging beam 41 is disposed on the inner mold hanging beam 4, and the longitudinally moving guide beam 5 and the upper back frame 23 can slide relatively. Before the reinforcement cage is integrally hoisted, the inner die unit 2 is anchored to the poured continuous beam section through the inner die hanging beam 4 and the inner die hanging rod 41, the longitudinally moving guide beam 5 slides into the poured continuous beam section (particularly shown in fig. 2), then the reinforcement cage is hoisted to the installation position by the hanging frame, and at the moment, the inner die cannot influence the integral hoisting of the reinforcement cage. After the reinforcement cage is in place, the front end of the longitudinally moving guide beam 5 slides onto the supporting cross beam 7 (particularly shown in fig. 1), the supporting cross beam 7 provides support, then the inner mold suspender 41 is loosened, the inner mold unit 2 slides forwards along the longitudinally moving guide beam 5 to the section to be poured, the inner mold is not required to be assembled on site, the construction period is further shortened, and the whole structure is simple and effective and is convenient to operate.
As a preferred embodiment, the longitudinal moving guide beam 5 is an i-shaped section beam, and the upper back frame 23 is provided with rollers 231 at two sides of the web plate of the longitudinal moving guide beam 5, so that dynamic stress is more dispersed and balanced. When the longitudinal moving guide beam 5 needs to slide forwards, the roller 231 contacts with the upper wing plate of the longitudinal moving guide beam 5 to provide support for the longitudinal moving guide beam 5; when the internal mold unit 2 needs to slide forwards, the roller 231 is contacted with the lower wing plate of the longitudinal movement guide beam 5, the longitudinal movement guide beam 5 provides a guiding function for the internal mold unit 2, and the position of the internal mold unit 2 is prevented from deviating, so that the structure is simple and effective. Of course, in other embodiments, the rollers 231 may be provided only on the inner or outer side of the web of the longitudinal girder 5.
As a preferred embodiment, the inner die hanging beam 4 and the longitudinally moving guide beam 5 are arranged in parallel, so that when the inner die unit 2 needs to slide forwards, the dynamic stress balance of the inner die unit 2 is ensured, and the safety and reliability of the device are improved.
While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a cantilever pouring construction is with hanging basket centre form which characterized in that: comprises a joint template (1) and two oppositely arranged inner die units (2), wherein the inner die units (2) comprise an upper die plate (21) and side die plates (22), one side of the joint template (1) is lapped on the upper die plate (21) of one inner die unit (2), the other side is lapped on the upper die plate (21) of the other inner die unit (2), the transverse moving assembly (3) further comprises a transverse moving assembly (3), the transverse moving assembly (3) comprises a transverse moving guide beam (31) and a transverse moving driving piece (32), an upper back frame (23) is arranged below the upper die plate (21), the upper back frame (23) is slidably arranged on the transverse moving guide beam (31), the two ends of the transverse moving driving piece (32) are respectively connected with the upper back frames (23) of the two inner mould units (2), the transverse moving driving piece also comprises an inner mould hanging beam (4), a longitudinal moving guide beam (5) and a supporting cross beam (7) for providing support for the longitudinal moving guide beam (5), the transverse moving guide beam (31) is arranged on the inner mould hanging beam (4), an inner mould hanging rod (41) is arranged on the inner mould hanging beam (4), the longitudinal moving guide beam (5) and the upper back frames (23) can slide relatively, before the whole hoisting of the reinforcement cage, the inner mould units (2) are anchored on the poured continuous beam sections through the inner mould hanging rod (41), sliding the longitudinally moving guide beam (5) into the poured continuous beam section; after the reinforcement cage is in place, the front end of the longitudinal moving guide beam (5) slides onto the supporting cross beam (7), the supporting cross beam (7) provides support, then the inner mould suspender (41) is loosened, and the inner mould unit (2) slides forwards along the longitudinal moving guide beam (5) to the section to be poured.
2. The hanging basket internal mold for cantilever casting construction according to claim 1, wherein: the joint template (1), the upper template (21) and the side templates (22) are all steel templates.
3. The hanging basket internal mold for cantilever casting construction according to claim 1, wherein: the side form (22) inboard is equipped with side back of body frame (24), side back of body frame (24) with go up back of body frame (23) are articulated, upward be equipped with on back of body frame (23) be used for driving side back of body frame (24) pivoted receipts mould driving piece (25).
4. The hanging basket internal mold for cantilever casting construction according to claim 3, wherein: the die-sinking driving piece (25) is a die-sinking oil cylinder, one end of the die-sinking oil cylinder is hinged with the upper back frame (23), and the other end of the die-sinking oil cylinder is hinged with the side back frame (24).
5. The hanging basket internal mold for cantilever casting construction according to claim 1, wherein: the transverse moving driving piece (32) is a transverse moving oil cylinder, and two ends of the transverse moving oil cylinder are respectively hinged with the upper back frames (23) of the two inner mold units (2).
6. The hanging basket internal mold for cantilever casting construction according to claim 1, wherein: and a positioning stay bar (33) is arranged on the transverse guide beam (31), and the upper end of the positioning stay bar (33) is connected with the joint template (1).
7. The hanging basket inner mold for cantilever casting construction according to any one of claims 3 to 6, wherein: the longitudinal moving guide beam (5) is an I-shaped section beam, and the upper back frame (23) is provided with rollers (231) on at least one side of a web plate of the longitudinal moving guide beam (5).
8. The hanging basket inner mold for cantilever casting construction according to any one of claims 3 to 6, wherein: the inner mould hanging beam (4) is arranged in parallel with the longitudinal moving guide beam (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211048825.1A CN115387244B (en) | 2022-08-30 | 2022-08-30 | Hanging basket internal mold for cantilever pouring construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211048825.1A CN115387244B (en) | 2022-08-30 | 2022-08-30 | Hanging basket internal mold for cantilever pouring construction |
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| Publication Number | Publication Date |
|---|---|
| CN115387244A CN115387244A (en) | 2022-11-25 |
| CN115387244B true CN115387244B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211048825.1A Active CN115387244B (en) | 2022-08-30 | 2022-08-30 | Hanging basket internal mold for cantilever pouring construction |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200189326Y1 (en) * | 1999-12-27 | 2000-07-15 | 김근택 | Incremental launching method type pc box girder bridge making mold system |
| CN102409621A (en) * | 2011-11-17 | 2012-04-11 | 中铁十五局集团有限公司 | Easy-to-dismount steel mould for hollow beam of bridge |
| CN108582431A (en) * | 2018-07-12 | 2018-09-28 | 中交航局第工程有限公司 | A kind of method for dismounting after prefabricated case beam core model and its use |
| CN209652772U (en) * | 2019-02-21 | 2019-11-19 | 中交第二公路工程局有限公司 | Box girder bridge cantilever construction main truss cradle system |
| CN111005317A (en) * | 2019-12-03 | 2020-04-14 | 中交第二航务工程局有限公司 | Hanging basket variable-section inner cavity adjustable fixed steel inner mold device and construction method |
| CN211312218U (en) * | 2019-11-08 | 2020-08-21 | 山东丰年路桥钢构有限公司 | Interior slide beam removes subassembly |
| CN212835002U (en) * | 2020-06-18 | 2021-03-30 | 中铁十一局集团第一工程有限公司 | Be used for cable-stay bridge cable beam anchor block template device that can slide |
-
2022
- 2022-08-30 CN CN202211048825.1A patent/CN115387244B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200189326Y1 (en) * | 1999-12-27 | 2000-07-15 | 김근택 | Incremental launching method type pc box girder bridge making mold system |
| CN102409621A (en) * | 2011-11-17 | 2012-04-11 | 中铁十五局集团有限公司 | Easy-to-dismount steel mould for hollow beam of bridge |
| CN108582431A (en) * | 2018-07-12 | 2018-09-28 | 中交航局第工程有限公司 | A kind of method for dismounting after prefabricated case beam core model and its use |
| CN209652772U (en) * | 2019-02-21 | 2019-11-19 | 中交第二公路工程局有限公司 | Box girder bridge cantilever construction main truss cradle system |
| CN211312218U (en) * | 2019-11-08 | 2020-08-21 | 山东丰年路桥钢构有限公司 | Interior slide beam removes subassembly |
| CN111005317A (en) * | 2019-12-03 | 2020-04-14 | 中交第二航务工程局有限公司 | Hanging basket variable-section inner cavity adjustable fixed steel inner mold device and construction method |
| CN212835002U (en) * | 2020-06-18 | 2021-03-30 | 中铁十一局集团第一工程有限公司 | Be used for cable-stay bridge cable beam anchor block template device that can slide |
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| Publication number | Publication date |
|---|---|
| CN115387244A (en) | 2022-11-25 |
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Address after: No. 205, Xingsha Avenue, Xingsha Street, Changsha County, Changsha, Hunan Province, 410199 Patentee after: Hunan Wuxin Intelligent Engineering Machinery Co.,Ltd. Country or region after: China Address before: No. 205, Xingsha Avenue, Xingsha Street, Changsha County, Changsha, Hunan Province, 410199 Patentee before: Hunan China Railway Wuxin Formwork Engineering Service Co.,Ltd. Country or region before: China |