CN220681142U - Production device for prefabricated box girder - Google Patents
Production device for prefabricated box girder Download PDFInfo
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- CN220681142U CN220681142U CN202322241085.XU CN202322241085U CN220681142U CN 220681142 U CN220681142 U CN 220681142U CN 202322241085 U CN202322241085 U CN 202322241085U CN 220681142 U CN220681142 U CN 220681142U
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 238000007789 sealing Methods 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a production device of prefabricated box girder components, wherein a track and fixing tables symmetrically arranged on two sides of the track are fixedly arranged at the upper end of a base along the direction of front and rear ends; the track is connected with a moving assembly in a sliding way; the two side templates are oppositely arranged and are respectively connected with the upper ends of the two fixed tables in a sliding way; the end-capped templates are bucket-shaped and are two, the opening ends of the end-capped templates are upwards arranged at the front end and the rear end of the supporting bottom plate at the upper end of the movable assembly, which correspond to the front end and the rear end of the side templates, the end-capped templates and the supporting bottom plate are in seamless connection to form an outer frame with the opening being upwards in seamless connection, the inner core die is positioned inside the outer frame, the front end and the rear end of the inner core die are in seamless connection with the end-capped templates of the outer frame, and an annular pouring forming cavity is formed between the periphery of the inner core die and the outer frame. The production device of the prefabricated box girder component, which is designed by the utility model, not only can reduce the production period and improve the production efficiency, but also can ensure the uniformity and stability of the girder body size of the box girder and improve the production quality and safety of the prefabricated box girder component.
Description
Technical Field
The utility model relates to the technical field of construction of prefabricated box girder components for bridges, in particular to a production device of the prefabricated box girder components for bridges.
Background
The box girder is used as one of important structures in bridge engineering and is divided into a prefabricated box girder and a cast-in-situ box girder according to a concrete pouring mode. The prefabricated box girder is prefabricated in advance in a single place, and then is hoisted after the lower structure of the bridge is completed. Because the prefabricated box girder can effectively avoid construction cross interference, the engineering progress is greatly improved, and the construction period is saved, the prefabricated box girder is widely applied.
The existing production mode is to fixedly install a plurality of production pedestals, then the hoisting templates are separately fixed on two sides of the pedestals, hoisting reinforcement cages, installing end-capped templates and inner core molds, installing inner core mold pressing bars, pouring concrete after the inner core mold pressing bars are ready, and manually disassembling an outer mold after beam concrete on the pedestals reaches the mold disassembling strength. And hoisting the template to the next production pedestal for vertical mould concrete casting. In the production mode, 1) the production pedestal has the advantages of large installation quantity, wide occupied area, large labor consumption, increased production period and low production efficiency; 2) Most of the lifting operation is performed in the installation process, the risk sources are more, the safety risk is high, the installation precision of the lifting operation is difficult to ensure, the beam body size of the produced box beam is influenced, and the appearance quality of the beam body is further influenced; 3) In the construction process, impact force generated by pouring concrete and vibration force generated by vibrating the concrete for discharging air bubbles generate buoyancy to the core mold, and if the core mold floats upwards, the bottom plate thickness and the top plate thickness of the box girder are caused to be thin, so that the quality of precast box girder components is influenced.
Therefore, how to provide a production device for the prefabricated box girder, which not only can reduce the production cycle and the safety risk and improve the production efficiency, but also can ensure the girder body size of the box girder, and simultaneously can avoid the floating of the core mould, ensure the uniformity and stability of the girder body size and improve the quality of the prefabricated box girder component, is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the utility model provides a device for producing a prefabricated box girder, which not only can reduce production period and safety risk and improve production efficiency, but also can ensure the girder size of the box girder, and can avoid floating of a core mould, ensure uniform and stable girder size and improve the quality of prefabricated box girder components.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a production device for prefabricated box girders, comprising: the device comprises a base, a moving assembly and a template assembly;
the upper end of the base is fixedly provided with a track along the front and rear end directions and fixing tables symmetrically arranged at two sides of the track; the plurality of moving assemblies are arranged along the length direction of the track, each moving assembly comprises a moving trolley and a supporting bottom plate, the lower end of each moving trolley is connected with the upper end of the track in a sliding manner, and the supporting bottom plates are fixed at the upper end of each moving trolley;
the template assembly comprises two side templates, end-capped templates and an inner core die, wherein the two side templates are oppositely arranged and respectively connected with the upper ends of the two fixed tables in a sliding manner, and one side, close to the supporting bottom plate, of the lower ends of the two side templates is respectively in seamless connection with the two sides of the supporting bottom plate; the end-sealing templates are bucket-shaped and are two, the opening ends of the end-sealing templates are upwards arranged at the upper end of the supporting bottom plate, the front end and the rear end of the end-sealing templates correspond to the side templates, the side plates of the end-sealing templates are respectively in seamless connection with the side templates at the two sides, the bottom plate of the end-sealing templates is in seamless connection with the upper end of the supporting bottom plate, and the side templates, the supporting bottom plate and the end-sealing templates form an outer frame with an opening at the upper end; the inner core mould is positioned inside the outer frame, the front end and the rear end of the lower end of the inner core mould are respectively lapped on the bottom plate of the end-capped template and are in seamless connection with one side far away from the supporting bottom plate, the front end and the rear end of the two sides of the inner core mould are respectively in seamless connection with the side plate of the end-capped template and one side far away from the side template, the upper end face of the inner core mould is lower than the upper end face of the outer frame, and an annular concrete pouring forming cavity is formed in an end face gap between the periphery of the inner core mould and the outer frame.
According to the technical scheme, the prefabricated box girder production device is provided, the movable assembly is moved between the two fixed tables, concrete pouring forming is carried out through the upper end opening of the annular pouring forming cavity, after the girder body concrete reaches the demolding strength, only the side templates are required to be slid, the two end sealing templates and the inner core mold are required to be disassembled, then the next movable assembly is moved between the fixed tables, the side templates are slid to the position close to the movable assembly, the end sealing templates and the inner core mold are required to be fixed, and next pouring can be carried out, compared with the prior art, the prefabricated box girder production device has the advantages that the production of a plurality of prefabricated box girders can be completed only by installing one set of production pedestal, the labor amount is reduced, the production period is shortened, and the production efficiency is improved; and through the side form plate, the end-capped form plate and the inner core mold which are relatively fixed, the dimension specification of the forming cavity of the precast box girder component can be ensured to be stable, the appearance quality of the precast box girder component after pouring is good and uniform, and the quality of the precast box girder component is improved.
Preferably, the upper end of the side plate extends to the flanges at two sides, and the extending section and the outer side surface of the upper end of the end-capped template form arc transition surfaces and are in seamless connection with the side templates.
The upper end of the fixed table is connected with a sliding seat in a sliding way, the side templates are fixed on the sliding seat, and the side templates on two sides move oppositely or relatively.
Further, the sliding direction of the sliding seat is perpendicular to the length direction of the rail, and the upper end surface of the fixed table is arranged in a downward inclined manner from one side close to the rail to one side far away from the rail.
Furthermore, the lower end of the sliding seat is inclined and matched with the upper end of the fixed table so as to ensure that the upper end surface of the sliding seat is in a horizontal state.
Further, the height of the sliding seat is set to control the bottom inner side angle template surface of the side template at the upper end of the sliding seat to be matched and connected with the plane where the supporting bottom plate is located.
Through the technical scheme, demolding at the arc transition surface of the flange of the beam body can be facilitated, stability of the side template can be guaranteed on one hand, and on the other hand, the side template can be in seamless connection with two sides of the supporting bottom plate.
Preferably, the fixed table is fixedly connected with a telescopic driving piece arranged along the sliding direction of the sliding seat, and the other end of the telescopic driving piece is fixedly connected with the side template.
Further, the telescopic driving piece is a hydraulic rod or a push-pull rod. The sliding seat is driven by the telescopic driving piece to drive the side templates to slide, in the working process, the supporting bottom plate moves between the two working tables, the two side templates slide to be in seamless connection with the two sides of the supporting bottom plate, and when the concrete pouring is completed to reach the form removing strength, the side templates slide to the two sides to complete the form removing of the side templates.
Preferably, the inner core mold is a hollow column formed by detachably enclosing a plurality of mold pieces, and a plurality of support frames for supporting the mold pieces are arranged in the inner cavity of the hollow column. The inner core die can be conveniently disassembled through the arrangement of the structure, so that the labor intensity is reduced, the labor force is saved, the production period is shortened, and the production efficiency is improved; the integral rigidity and strength of the core mold can be improved through the arrangement of the supporting frame
Preferably, the lower end of the hollow cylinder is fixed at the upper end of the supporting bottom plate through a screw rod. Through the setting of this structure can fix the inner core mould, avoid pouring the impact force that concrete produced and for the discharge bubble and vibrate the vibration force that the concrete produced to the inner core mould produce buoyancy and cause the thick phenomenon of bottom plate, roof of case roof beam, improved the quality of prefabricated case roof beam component.
Preferably, the upper end of the base is continuously provided with a plurality of functional sections along the length direction of the rail, the functional sections opposite to the fixed table are concrete pouring areas, and the mobile trolley slides to each functional section on the rail.
Further, the functional segments are preferably four, which in turn are: the system comprises a steel bar binding arrangement area, a concrete building area, a concrete curing area, a tensioning and finished product area; the reinforced bar binding arrangement area is positioned in the front end direction of the concrete pouring area, and the concrete curing area and the beam body tensioning finished product area are sequentially positioned in the rear end direction of the concrete pouring area.
Specifically, the reinforcement bar binding arrangement area is mainly used for carrying out reinforcement cage arrangement and binding work on the prefabricated box girder components; if the space of the field is limited, the bound reinforcement cage can be integrally hoisted into the cavity of the closed side template.
And arranging opposite areas on the fixed table and the templates at two sides of the concrete building area, and carrying out concrete pouring forming.
The concrete curing area performs steam sealing curing on the precast small box girder components after pouring;
and tensioning a finished product area, tensioning and grouting the prefabricated small box girder component with the concrete strength reaching the designed tensioning value, and hoisting and transferring the finished prefabricated box girder component after the processing steps are completed.
Through the technical scheme, the assembly line production of the prefabricated box girder components can be realized, the appearance quality of the prefabricated box girder components is improved, the overall production efficiency of the prefabricated box girder components is improved, and the comprehensive benefit is obvious.
Compared with the prior art, the production device can finish the production of a plurality of prefabricated box beams by only installing one set of production pedestal, reduces the amount of manual labor, shortens the production period and improves the production efficiency; the dimensional specification of the forming cavity of the precast box girder component can be ensured to be stable through the side templates, the end-capped templates and the inner core mold which are relatively fixed, the appearance quality of the precast box girder component after pouring is good and uniform, and the quality of the precast box girder component is improved; the inner core die can be fixed, the phenomena of bottom plate thickness and top plate thinness of the box girder caused by buoyancy generated by impact force generated by pouring concrete and vibration force generated by vibrating the concrete for discharging air bubbles on the inner core die are avoided, and the quality of precast box girder components is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall block diagram of a precast box girder production device of the present utility model;
FIG. 2 is a schematic diagram of a capping template according to the present utility model;
FIG. 3 is a schematic view of a core mold according to the present utility model;
wherein 1 is a base; 2 is a track; 3 is a fixed table; 4 is a mobile trolley; 5 is a supporting bottom plate; 6 is a side template; 7 is a telescopic driving piece; 8 is a sliding seat; 9 end-capping the template; 10 an inner core mold; 11 screw rods; 12 is a supporting frame; 13 is a side plate; 14 is a bottom plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, an embodiment of the present utility model discloses a device for producing a prefabricated box girder, which includes: the device comprises a base 1, a moving assembly and a template assembly;
the upper end of the base 1 is fixedly provided with a track 2 along the front and rear end directions and fixed tables 3 symmetrically arranged on two sides of the track 2; the plurality of moving assemblies are arranged along the length direction of the track 2, each moving assembly comprises a moving trolley 4 and a supporting bottom plate 5, the lower end of each moving trolley 4 is connected with the upper end of the track 2 in a sliding manner, and the supporting bottom plate 5 is fixed at the upper end of each moving trolley 4;
the template assembly comprises two side templates 6, end-capped templates 9 and an inner core mold 10, wherein the two side templates 6 are oppositely arranged and respectively connected with the upper ends of the two fixed tables 3 in a sliding manner, and one side, close to the supporting bottom plate 5, of the lower ends of the two side templates 6 is respectively in seamless connection with two sides of the supporting bottom plate 5; the end-sealing templates 9 are bucket-shaped and are two, the opening ends of the end-sealing templates are upwards arranged at the upper end of the supporting bottom plate 5, the front end and the rear end of the corresponding side templates 6 are respectively in seamless connection with the side templates 6 at the two sides, the bottom plate 14 of the end-sealing template 9 is in seamless connection with the upper end of the supporting bottom plate 5, and the side templates 6, the supporting bottom plate 5 and the end-sealing template 9 form an outer frame with an opening at the upper end; the inner core mould 10 is positioned in the outer frame, the front end and the rear end of the lower end of the inner core mould are respectively lapped on the bottom plate 14 of the end sealing mould plate 9 and are in seamless connection with one side far away from the supporting bottom plate 5, the front end and the rear end of the two sides of the inner core mould are respectively in seamless connection with the side plate 13 of the end sealing mould plate 9 and one side far away from the side mould plate 6, the upper end face of the inner core mould is lower than the upper end face of the outer frame, and an annular concrete pouring forming cavity is formed in an end face gap between the periphery of the inner core mould 10 and the outer frame.
In order to further optimize the technical scheme, the upper end of the side plate 13 extends to the flanges at two sides, and the extending section and the outer side surface of the upper end of the end-capped template 9 form an arc transition surface and are in seamless connection with the side template 6.
In order to further optimize the technical scheme, the upper end of the fixed table 3 is slidably connected with a sliding seat 8, and the sideforms 6 are fixed on the sliding seat 8 and the sideforms 6 on two sides move towards each other or relatively.
Further, the sliding direction of the sliding seat 8 is perpendicular to the length direction of the track 2, and the upper end face of the fixed table 3 is arranged in a downward inclined manner from one side close to the track 2 to one side far away from the track, and the lower end of the sliding seat 8 is arranged in an inclined manner which is identical to the upper end of the fixed table 3, so that the upper end face of the sliding seat is in a horizontal state.
Further, the height of the sliding seat 8 is controlled by controlling the bottom inside corner template surface of the side template 6 at the upper end of the sliding seat 8 to be engaged with the plane where the supporting bottom plate 5 is located.
In order to further optimize the technical scheme, the fixed table 3 is fixedly connected with a telescopic driving piece 7 arranged along the sliding direction of the sliding seat 8, and the other end of the telescopic driving piece 7 is fixedly connected to the side template 6.
Further, the telescopic driving piece 7 is a hydraulic rod or a push-pull rod.
To further optimize the above technical solution, the inner core mold 10 is a hollow cylinder surrounded by a plurality of mold pieces in a detachable manner, and the inner cavity of the hollow cylinder is provided with a plurality of supporting frames 12 for supporting the mold pieces.
Further, the lower end of the hollow cylinder is fixed to the upper end of the supporting base plate 5 by a screw 11.
In order to further optimize the technical scheme, the upper end of the base is provided with a plurality of functional sections along the length direction of the track 2, the functional sections opposite to the fixed table are concrete pouring areas, and the mobile trolley slides to each functional section on the track.
Further, the functional segments are preferably four, which in turn are: the system comprises a steel bar binding arrangement area, a concrete building area, a concrete curing area, a tensioning and finished product area; the reinforced bar binding arrangement area is positioned in the front end direction of the concrete pouring area, and the concrete curing area and the beam body tensioning finished product area are sequentially positioned in the rear end direction of the concrete pouring area.
Specifically, the reinforcement bar binding arrangement area is mainly used for carrying out reinforcement cage arrangement and binding work on the prefabricated box girder components; if the space of the field is limited, the bound reinforcement cage can be wholly and transversely hoisted into the cavity of the closed side template.
And arranging opposite areas on the fixed table and the templates at two sides of the concrete building area, and carrying out concrete pouring forming.
The concrete curing area performs steam sealing curing on the precast small box girder components after pouring;
and tensioning a finished product area, tensioning and grouting the prefabricated small box girder component with the concrete strength reaching the designed tensioning value, and hoisting and transferring the finished prefabricated box girder component after the processing steps are completed.
Compared with the prior art, the production device for the prefabricated box beams can finish the production of a plurality of prefabricated box beams by only installing one set of production pedestal, reduces the manual labor amount, reduces the production period and improves the production efficiency; the fixed side templates, the end-capped templates and the inner core mould can ensure that the dimension specification of the forming cavity of the prefabricated box girder component is stable, the appearance quality of the poured prefabricated small box girder component is good and uniform, and the quality of the prefabricated box girder component is improved; the inner core die can be fixed, the phenomena of bottom plate thickness and top plate thinness of the box girder caused by buoyancy generated by impact force generated by pouring concrete and vibration force generated by vibrating the concrete for discharging air bubbles on the inner core die are avoided, and the quality of precast box girder components is improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a apparatus for producing of prefabricated case roof beam which characterized in that includes: the device comprises a base (1), a moving assembly and a template assembly;
the upper end of the base (1) is fixedly provided with a track (2) along the front and rear end directions, and fixed tables (3) are symmetrically arranged on two sides of the track (2); the movable components are arranged in a plurality along the length direction of the track (2), each movable component comprises a movable trolley (4) and a supporting bottom plate (5), the lower ends of the movable trolleys (4) are connected with the upper ends of the track (2) in a sliding mode, and the supporting bottom plates (5) are fixed at the upper ends of the movable trolleys (4);
the template assembly comprises two side templates (6), end-capped templates (9) and an inner core die (10), wherein the two side templates (6) are oppositely arranged and are respectively and slidably connected to the upper ends of the two fixed tables (3), and one side, close to the supporting bottom plate (5), of the lower ends of the two side templates (6) is respectively and seamlessly connected with two sides of the supporting bottom plate (5); the end-capped templates (9) are bucket-shaped and are two, the opening ends of the end-capped templates are upwards arranged at the upper end of the supporting bottom plate (5) and correspond to the front end and the rear end of the side templates (6), the side plates (13) of the end-capped templates are respectively in seamless connection with the side templates (6) on the two sides, and the bottom plate (14) of the end-capped templates (9) is in seamless connection with the upper end of the supporting bottom plate (5); the side templates (6), the supporting bottom plate (5) and the end-capped templates (9) form an outer frame with an opening at the upper end; the inner core mold (10) is positioned inside the outer frame, the front end and the rear end of the inner core mold (10) are respectively lapped on the bottom plate (14) of the end sealing mold plate (9) and are far away from one side of the supporting bottom plate (5) and are in seamless connection, the front end and the rear end of the two sides of the inner core mold are respectively and seamlessly connected with the side plate (13) of the end sealing mold plate (9) and far away from one side of the side mold plate (6), the upper end face of the inner core mold is lower than the upper end face of the outer frame, and an annular concrete pouring forming cavity is formed in an end face gap between the periphery of the inner core mold (10) and the outer frame.
2. The device for producing the prefabricated box girder according to claim 1, wherein the upper end of the side plate (13) extends to the flanges at two sides, and the extending section forms an arc transition surface with the outer side of the upper end of the end-capped template (9) and is in seamless connection with the side template (6).
3. The device for producing the prefabricated box girder according to claim 1, wherein the upper end of the fixed table (3) is slidably connected with a sliding seat (8), and the side template (6) is fixed on the sliding seat (8).
4. A device for producing prefabricated box girders according to claim 3, characterized in that the sliding direction of the sliding seat (8) is perpendicular to the length direction of the rail (2), the upper end surface of the fixed table (3) is inclined downwards from the side close to the rail (2) to the side far away from the rail, and the lower end of the sliding seat (8) is inclined to be matched with the upper end of the fixed table (3) so as to ensure that the upper end surface of the sliding seat is in a horizontal state.
5. The device for producing the prefabricated box girder according to claim 4, wherein the fixed table (3) is fixedly connected with a telescopic driving piece (7) arranged along the sliding direction of the sliding seat (8), and the other end of the telescopic driving piece (7) is fixedly connected to the side template (6).
6. A production device for prefabricated box girders according to claim 5, characterized in that the telescopic drive (7) is a hydraulic or push-pull rod.
7. A production device for prefabricated box girders according to claim 1, characterized in that the inner core mould (10) is a hollow cylinder surrounded by a plurality of mould pieces in a detachable way, and the inner cavity of the hollow cylinder is provided with a plurality of supporting frames (12) for supporting the mould pieces.
8. The device for producing the prefabricated box girder according to claim 7, wherein the lower end of the hollow cylinder is fixed at the upper end of the supporting base plate (5) through a screw (11).
9. The device for producing the prefabricated box girder according to claim 1, wherein a plurality of functional sections are arranged at the upper end of the base (1) along the length direction of the track (2), the functional sections opposite to the fixed table (3) are concrete pouring areas, and the mobile trolley (4) slides to each functional section on the track (2).
10. The apparatus for producing a prefabricated box girder according to claim 9, wherein the functional section further comprises: the device comprises a steel bar binding arrangement area, a concrete curing area and a beam tensioning finished product area; the reinforced bar binding arrangement area is located in the front end direction of the concrete pouring area, and the concrete curing area and the beam body tensioning finished product area are sequentially located in the rear end direction of the concrete pouring area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322241085.XU CN220681142U (en) | 2023-08-21 | 2023-08-21 | Production device for prefabricated box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322241085.XU CN220681142U (en) | 2023-08-21 | 2023-08-21 | Production device for prefabricated box girder |
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| Publication Number | Publication Date |
|---|---|
| CN220681142U true CN220681142U (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322241085.XU Active CN220681142U (en) | 2023-08-21 | 2023-08-21 | Production device for prefabricated box girder |
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| CN (1) | CN220681142U (en) |
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2023
- 2023-08-21 CN CN202322241085.XU patent/CN220681142U/en active Active
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