CN214935392U - Cantilever gantry hoisting device - Google Patents
Cantilever gantry hoisting device Download PDFInfo
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- CN214935392U CN214935392U CN202120255582.3U CN202120255582U CN214935392U CN 214935392 U CN214935392 U CN 214935392U CN 202120255582 U CN202120255582 U CN 202120255582U CN 214935392 U CN214935392 U CN 214935392U
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Abstract
The utility model belongs to the technical field of portal cranes, and discloses a cantilever gantry hoisting device which comprises a cantilever beam and a plurality of supporting structures, wherein the cantilever beam extends along a first direction, a plurality of first strip holes are arranged at intervals along the first direction, and the first strip holes extend along the first direction; a plurality of bearing structure set up along first direction interval, and bearing structure includes portal frame and coupling assembling, and coupling assembling includes connecting piece and first retaining member, and the connecting piece can be dismantled with the portal frame and be connected, and first retaining member passes first rectangular hole and connects connecting piece and cantilever beam. The cantilever beam of the cantilever gantry hoisting device is convenient to assemble, disassemble and maintain, can finish hoisting and taking parts of different weight levels in engine rooms with different space sizes, and is strong in universality, high in space utilization rate and high in working efficiency.
Description
Technical Field
The utility model relates to a portal crane technical field especially relates to a cantilever longmen hoisting accessory.
Background
The space in the cabin is limited, changes the part and all adopts large-scale loop wheel machine to carry out the auxiliary operation on most model towers at present, at the operation in-process, because the crossbeam and the stand of most large-scale loop wheel machines are integrated into one piece, lead to the loop wheel machine not be convenient for assemble, dismantle and maintain, can not be applicable to accomplish in the cabin of not equidimension and get hanging of the part of different weight levels, space utilization is low, work efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cantilever longmen hoisting accessory to solve the current loop wheel machine of being not convenient for assemble, dismantle and maintain, can not be applicable to accomplish in the cabin of not space size and get hanging of the part of different weight levels, space utilization is low, and work efficiency is low, the poor problem of commonality.
To achieve the purpose, the utility model adopts the following technical proposal:
a cantilever gantry crane, comprising:
the cantilever beam extends along a first direction, a plurality of first strip holes are formed in the cantilever beam at intervals along the first direction, and the first strip holes extend along the first direction;
a plurality of bearing structure, it is a plurality of bearing structure follows the first direction interval sets up, bearing structure includes portal frame and coupling assembling, coupling assembling includes connecting piece and first locking piece, the connecting piece with the portal frame can be dismantled and be connected, first locking piece passes first rectangular hole and connect the connecting piece with the cantilever beam.
Preferably, the number of the supporting structures is two, the two supporting structures are respectively a first supporting structure and a second supporting structure, the cantilever beam is provided with a first end and a second end along the first direction, the first supporting structure is arranged at the first end, the second supporting structure is positioned between the first end and the second end, the cantilever gantry hoisting device further comprises a cable-stayed structure, and the cable-stayed structure is detachably connected with the connecting piece of the second supporting structure and the second end of the cantilever beam.
Preferably, the cable-stayed structure comprises a nut, a first pull rod and a second pull rod, the first pull rod is rotatably connected with the connecting piece of the second supporting structure, the second pull rod is rotatably connected with the second end of the cantilever beam, the nut is respectively in threaded connection with the first pull rod and the second pull rod, the nut is rotated, and the first pull rod and the second pull rod can be close to or far away from each other.
Preferably, the cable-stayed structure further comprises two mounting assemblies, each mounting assembly comprises a mounting seat and a first bolt, the two mounting seats are respectively mounted at the second end of the connecting piece of the second supporting structure and the second end of the cantilever beam, the first bolt is rotatably arranged on the mounting seats in a penetrating mode, and the two first bolts are respectively in threaded connection with the first pull rod and the second pull rod.
Preferably, the portal frame includes two stands that set up relatively and interval, can dismantle connect in two the crossbeam of the one end of stand and can dismantle connect in two the base of the other end of stand, the connecting piece in the measurement can be dismantled the connection.
Preferably, the upright post comprises a plurality of connecting posts which are detachably connected in sequence.
Preferably, the connecting assembly further comprises a second locking member, the connecting member comprises a first connecting plate, a second connecting plate and a third connecting plate which are sequentially connected along a first direction, the second connecting plate is detachably connected with the cross beam, the first locking member penetrates one of the first elongated holes and is connected with the first connecting plate and the cantilever beam, the second locking member penetrates the other of the first elongated holes and is connected with the third connecting plate and the cantilever beam, and the first locking member and the second locking member are respectively located on two sides of the cross beam.
Preferably, a plurality of second elongated holes are arranged at intervals on the base.
Preferably, the base includes a first surface and a second surface that are opposite and spaced apart from each other, the pillar is detachably connected to the first surface, the second surface is used for fixing the base, and the first surface and the second surface are disposed at an acute angle.
Preferably, the cantilever gantry hoisting device further comprises an electric hoist, the cantilever beam is an I-shaped beam, and the electric hoist is located on the cantilever beam in a rolling mode.
The utility model has the advantages that:
the utility model aims to provide a cantilever gantry crane device, which comprises a cantilever beam and a plurality of supporting structures, wherein the cantilever beam extends along a first direction, a plurality of first strip holes are arranged at intervals along the first direction, and the first strip holes extend along the first direction; a plurality of bearing structure set up along first direction interval, and bearing structure includes portal frame and coupling assembling, and coupling assembling includes connecting piece and first retaining member, and the connecting piece can be dismantled with the portal frame and be connected, and first retaining member passes first rectangular hole and connects connecting piece and cantilever beam. The cantilever gantry hoisting device is characterized in that a plurality of first strip holes are formed at intervals in a cantilever beam along a first direction, namely the plurality of first strip holes are formed in the extending direction of the cantilever beam, the plurality of first strip holes extend along the extending direction of the cantilever beam and are detachably connected with a gantry frame through a connecting piece, and locking pieces penetrate through the first strip holes and are connected with the connecting piece and the cantilever beam, so that the gantry frame and the cantilever beam are detachably connected through a connecting assembly to be convenient for assembling, disassembling and maintaining the cantilever gantry hoisting device, the assembling positions of the first locking pieces assembled in the first strip holes can be adjusted by loosening the first locking pieces, the assembling distances among the plurality of gantry frames can be adjusted, the bearing capacity of the cantilever gantry hoisting device is adjusted, the cantilever gantry hoisting device is convenient to be suitable for the sizes of inner spaces of different engine rooms, and the hoisting of parts with different weight levels in the engine rooms with different space sizes is realized, the work efficiency is improved, the universality of the cantilever gantry hoisting device is improved, and the space utilization rate of the cantilever gantry hoisting device is improved.
Drawings
Fig. 1 is a schematic structural view of a cantilever gantry crane provided in an embodiment of the present invention;
fig. 2 is an exploded view of a cantilever gantry crane according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base of the cantilever gantry crane provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a connecting piece of the cantilever gantry crane according to the embodiment of the present invention.
In the figure:
1. a cantilever beam; 11. an upper beam body; 111. a first elongated hole; 12. a lower beam body; 13. a first end; 14. a second end;
2. a gantry; 21. a column; 211. connecting columns; 22. a cross beam; 23. a base; 231. a second elongated hole; 232. a first surface; 233. a second surface;
3. a connecting assembly; 31. a connecting member; 311. a first connecting plate; 312. a second connecting plate; 313. a third connecting plate; 32. a first locking member; 33. a second locking member;
4. a cable-stayed structure; 41. a nut; 42. a first pull rod; 43. a second pull rod; 44. a mounting seat; 45. a first bolt.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The utility model provides a cantilever gantry hoisting device, as shown in figure 1, figure 2 and figure 4, the cantilever gantry hoisting device comprises a cantilever beam 1 and a plurality of supporting structures, the cantilever beam 1 extends along a first direction, the cantilever beam 1 is provided with a plurality of first strip holes 111 along the first direction at intervals, and the first strip holes 111 extend along the first direction; a plurality of bearing structure set up along first direction interval, and bearing structure includes portal frame 2 and coupling assembling 3, and coupling assembling 3 includes connecting piece 31 and first locking piece 32, and connecting piece 31 can be dismantled with portal frame 2 and be connected, and first locking piece 32 passes first rectangular hole 111 and connects connecting piece 31 and cantilever beam 1. The cantilever gantry hoisting device is characterized in that a plurality of first strip holes 111 are arranged at intervals on a cantilever beam 1 along a first direction, namely the plurality of first strip holes 111 are arranged along the extension direction of the cantilever beam, the plurality of first strip holes 111 extend along the extension direction of the cantilever beam 1 and are detachably connected with a gantry frame 2 through a connecting piece 31, and a locking piece penetrates through the first strip holes 111 and is connected with the connecting piece 31 and the cantilever beam 1, it can be understood that the gantry frame 2 and the cantilever beam 1 are detachably connected through a connecting component 3 so as to be convenient for the assembly, disassembly and maintenance of the cantilever gantry hoisting device, the assembly position of the first locking piece 32 in the first strip holes 111 is adjusted by loosening the first locking piece 32, the installation distance between the plurality of gantry frames 2 can be adjusted, thereby realizing the adjustment of the bearing capacity of the cantilever gantry hoisting device and being convenient for the cantilever gantry hoisting device to be suitable for the sizes of internal spaces of different engine rooms, the hoisting device has the advantages that hoisting of parts of different weight levels is completed in the engine rooms of different space sizes, working efficiency is improved, universality of the cantilever gantry hoisting device is improved, and space utilization rate of the cantilever gantry hoisting device is improved.
Optionally, as shown in fig. 1 and fig. 2, the number of the support structures is two, the two support structures are a first support structure and a second support structure respectively, along the first direction, the cantilever beam 1 has a first end 13 and a second end 14, the first support structure is disposed at the first end 13, the second support structure is located between the first end 13 and the second end 14, the cantilever gantry crane further includes a cable-stayed structure 4, and the cable-stayed structure 4 is detachably connected to a connecting member 31 of the second support structure and the second end 14 of the cantilever beam 1. Can dismantle the second end 14 of connecting in second bearing structure's connecting piece 31 and cantilever beam 1 through setting up to draw structure 4 to one side, draw structure 4 to one side and can tension second bearing structure's connecting piece 31 and cantilever beam 1's second end 14, can further strengthen cantilever beam 1's bearing capacity simultaneously, prevent that cantilever beam 1 from warping to improve cantilever gantry crane device's reliability.
Alternatively, as shown in fig. 1, 2 and 4, the cable-stayed structure 4 comprises a nut 41, a first pull rod 42 rotatably connected with the connecting member 31 of the second support structure, and a second pull rod 43 rotatably connected with the second end 14 of the cantilever beam 1, the nut 41 is respectively in threaded connection with the first pull rod 42 and the second pull rod 43, and the first pull rod 42 and the second pull rod 43 can approach or depart from each other by rotating the nut 41. The connecting piece 31 of the second supporting structure is rotatably connected with the first pull rod 42, and the second end 14 of the cantilever beam 1 is rotatably connected with the second pull rod 43, so that the mounting distance between the second supporting structure and the second end 14 of the cantilever beam 1 can be conveniently adjusted, and the cantilever gantry hoisting device can complete hoisting of components with different weight levels in engine rooms with different space sizes; through setting up nut 41 and first pull rod 42 and second pull rod 43 threaded connection respectively, rotatory nut 41 can realize that first pull rod 42 and second pull rod 43 are close to each other or keep away from to tensioning second bearing structure and the second end 14 of cantilever beam 1, further strengthening the bearing capacity of cantilever beam 1, prevent that cantilever beam 1 warp, with the reliability that improves cantilever gantry crane.
Optionally, as shown in fig. 1, fig. 2 and fig. 4, the cable-stayed structure 4 further includes two mounting assemblies, each mounting assembly includes a mounting seat 44 and a first bolt 45, the two mounting seats 44 are respectively mounted at the connecting member 31 of the second supporting structure and the second end 14 of the cantilever beam 1, the first bolt 45 is rotatably inserted into the mounting seats 44, and the two first bolts 45 are respectively in threaded connection with the first pull rod 42 and the second pull rod 43. Install respectively in connecting piece 31 of second bearing structure and cantilever beam 1's second end 14 through setting up two mount pads 44, mount pad 44 is worn to locate in first bolt 45 rotation, and two first bolts 45 respectively with first pull rod 42 and second pull rod 43 threaded connection, in order to realize with pulling structure 4 demountable assembly in second bearing structure and cantilever beam 1 to one side, be convenient for adjust the installation distance between second bearing structure and cantilever beam 1's second end 14, also be convenient for carry out the later maintenance to cantilever gantry crane device simultaneously. Preferably, the mounting assembly further comprises a second bolt, the mounting seat 44 mounted on the connecting member 31 of the second support structure is integrally formed with the connecting member 31 of the second support structure, and the mounting seat 44 mounted on the second end 14 of the cantilever beam 1 is detachably connected with the cantilever beam 1 by the second bolt.
Alternatively, as shown in fig. 1 to 4, the gantry 2 includes two opposite and spaced columns 21, a beam 22 detachably connected to one ends of the two columns 21, and a base 23 detachably connected to the other ends of the two columns 21, and the connecting member 31 is detachably connected to the beam 22. The upright column 21, the cross beam 22 and the base 23 are detachably connected, and the connecting piece 31 and the cross beam 22 are detachably connected, so that the assembly, the disassembly and the maintenance of the cantilever gantry hoisting device can be facilitated, the installation distance between the two supporting structures can be conveniently adjusted, the cantilever gantry hoisting device is suitable for different installation spaces, and the universality of the cantilever gantry hoisting device is improved.
Alternatively, as shown in fig. 1 and 2, the column 21 includes a plurality of connecting columns 211 detachably connected in sequence. Through setting up a plurality of spliced poles 211 that stand 21 includes can dismantle the connection in proper order, can adjust the quantity of spliced pole 211 according to the high range of installation space to the height of adjustment cantilever longmen hoisting accessory has further improved cantilever longmen hoisting accessory's commonality.
Optionally, as shown in fig. 1 to 4, the connecting assembly 3 further includes a second locking member 33, the connecting member 31 includes a first connecting plate 311, a second connecting plate 312 and a third connecting plate 313 which are sequentially connected along the first direction, the second connecting plate 312 is detachably connected with the cross beam 22, the first locking member 32 passes through one of the first elongated holes 111 and connects the first connecting plate 311 and the cantilever beam 1, the second locking member 33 passes through the other one of the first elongated holes 111 and connects the third connecting plate 313 and the cantilever beam 1, and the first locking member 32 and the second locking member 33 are respectively located at two sides of the cross beam 22. The second connecting plate 312 is detachably connected with the cross beam 22, the first locking member 32 passes through one of the first elongated holes 111 and connects the first connecting plate 311 and the cantilever beam 1, the second locking member 33 passes through the other first elongated hole 111 and connects the third connecting plate 313 and the cantilever beam 1, so as to realize the detachable connection of the connecting piece 31 with the cross beam 22 and the cantilever beam 1, so that by adjusting the installation distance between the portal frame 2 of the first supporting structure and the portal frame 2 of the second supporting structure, therefore, the bearing capacity of the cantilever gantry hoisting device is adjusted, the cantilever gantry hoisting device is suitable for the sizes of the internal spaces of different engine rooms, hoisting of parts with different weight levels can be completed in the engine rooms with different space sizes, the working efficiency is improved, the universality of the cantilever gantry hoisting device is improved, and the space utilization rate of the cantilever gantry hoisting device is improved; the first locking member 32 and the second locking member 33 are respectively arranged on two sides of the cross beam 22, so that the cantilever beam 1 can be effectively fixed to the cross beam 22 through the first locking member 32 and the second locking member 33.
Alternatively, as shown in fig. 1 to 3, a plurality of second elongated holes 231 are spaced apart from each other on the base 23. Specifically, the cantilever gantry hoisting device further comprises a third bolt, wherein the base 23 is provided with a plurality of second long strip holes 231, and the third bolt penetrates through the second long strip holes 231 and is screwed on the installation ground so as to fixedly install the cantilever gantry hoisting device on the installation ground, wherein the installation ground is the ground in the engine room; meanwhile, the installation position of the cantilever gantry hoisting device in the cabin is convenient to adjust. Preferably, two second elongated holes 231 are spaced apart from each other on the base 23 of each gantry 2.
Alternatively, as shown in fig. 1-3, the base 23 includes a first surface 232 and a second surface 233 opposite and spaced apart from each other, the pillar 21 is detachably connected to the first surface 232, the second surface 233 is used for fixing the base 23, and the first surface 232 and the second surface 233 are disposed at an acute angle. It can be understood that the second surface 233 is attached to the ground in the cabin, and the ground in the cabin is an inclined surface, so that the first surface 232 and the second surface 233 are arranged at an acute angle to ensure that the cantilever gantry crane installed on the ground in the cabin is perpendicular to the horizontal plane, thereby ensuring that the cantilever gantry crane works normally and effectively. In other embodiments, the first surface 232 and the second surface 233 of the base 23 may be disposed to be opposite and spaced apart from each other, and are parallel to each other, so as to assemble the cantilever gantry crane on the horizontal bottom surface, thereby ensuring the normal and effective operation of the cantilever gantry crane, and expanding the applicable places of the cantilever gantry crane.
Optionally, the cantilever gantry lifting device further comprises an electric hoist, the cantilever beam 1 is an i-beam, and the electric hoist is located on the cantilever beam 1 in a rolling mode. By arranging the cantilever beam 1 as an i-beam, as shown in fig. 1 and 2, specifically, the cantilever beam 1 includes an upper beam body 11 and a lower beam body 12, a plurality of first elongated holes 111 are arranged at intervals in the upper beam body 11 of the cantilever beam 1, the electric hoist is arranged on the lower beam body 12 of the cantilever beam 1 in a rolling manner, and the electric hoist is used for hoisting a component.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A cantilever gantry hoisting device is characterized by comprising:
the cantilever beam (1) extends along a first direction, a plurality of first long holes (111) are formed in the cantilever beam (1) at intervals along the first direction, and the first long holes (111) extend along the first direction;
a plurality of bearing structure, a plurality of bearing structure follows the first direction interval sets up, bearing structure includes portal frame (2) and coupling assembling (3), coupling assembling (3) include connecting piece (31) and first retaining member (32), connecting piece (31) with portal frame (2) can be dismantled and be connected, first retaining member (32) pass first rectangular hole (111) and connect connecting piece (31) and cantilever beam (1).
2. The cantilever gantry crane according to claim 1, wherein the number of the support structures is two, the two support structures are a first support structure and a second support structure, respectively, the cantilever beam (1) has a first end (13) and a second end (14) along the first direction, the first support structure is disposed at the first end (13), the second support structure is located between the first end (13) and the second end (14), the cantilever gantry crane further comprises a cable-stayed structure (4), and the cable-stayed structure (4) is detachably connected to the connecting member (31) of the second support structure and the second end (14) of the cantilever beam (1).
3. Cantilever gantry crane according to claim 2, wherein the cable-stayed structure (4) comprises a nut (41), a first tie rod (42) rotatably connected to the connection member (31) of the second support structure and a second tie rod (43) rotatably connected to the second end (14) of the cantilever beam (1), the nut (41) being respectively in threaded connection with the first tie rod (42) and the second tie rod (43), and rotating the nut (41), the first tie rod (42) and the second tie rod (43) being able to approach or move away from each other.
4. The cantilever gantry crane device according to claim 3, wherein the cable-stayed structure (4) further comprises two mounting assemblies, each mounting assembly comprises a mounting seat (44) and a first bolt (45), the two mounting seats (44) are respectively mounted on the connecting piece (31) of the second support structure and the second end (14) of the cantilever beam (1), the first bolts (45) are rotatably arranged on the mounting seats (44), and the two first bolts (45) are respectively in threaded connection with the first pull rod (42) and the second pull rod (43).
5. A cantilever gantry crane according to claim 1, wherein the gantry (2) comprises two opposite and spaced columns (21), a beam (22) detachably connected to one end of the two columns (21), and a base (23) detachably connected to the other end of the two columns (21), and the connecting member (31) is detachably connected to the beam (22).
6. Cantilever gantry crane according to claim 5, wherein the upright (21) comprises a plurality of connecting columns (211) detachably connected in sequence.
7. A cantilevered gantry crane assembly according to claim 5, wherein the connection assembly (3) further comprises a second locking member (33), the connection member (31) comprises a first connection plate (311), a second connection plate (312) and a third connection plate (313) which are connected in sequence along a first direction, the second connection plate (312) is detachably connected with the beam (22), the first locking member (32) passes through one of the first elongated holes (111) and connects the first connection plate (311) and the cantilever beam (1), the second locking member (33) passes through the other one of the first elongated holes (111) and connects the third connection plate (313) and the cantilever beam (1), and the first locking member (32) and the second locking member (33) are respectively located at two sides of the beam (22).
8. A cantilevered gantry crane assembly according to claim 5, wherein the base (23) is provided with a plurality of second elongated holes (231) at intervals.
9. A cantilevered gantry crane assembly according to claim 6, wherein said base (23) comprises a first surface (232) and a second surface (233) which are opposed and spaced apart, said column (21) being removably attached to said first surface (232), said second surface (233) being adapted to secure said base (23), said first surface (232) being disposed at an acute angle to said second surface (233).
10. The cantilever gantry crane according to claim 1, further comprising an electric hoist, wherein the cantilever beam (1) is an i-beam, and the electric hoist is located on the cantilever beam (1) in a rolling manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120255582.3U CN214935392U (en) | 2021-01-29 | 2021-01-29 | Cantilever gantry hoisting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120255582.3U CN214935392U (en) | 2021-01-29 | 2021-01-29 | Cantilever gantry hoisting device |
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| CN214935392U true CN214935392U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405114A (en) * | 2022-09-30 | 2022-11-29 | 中建科技河南有限公司 | A platform for assembling concrete faces building wallboard |
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2021
- 2021-01-29 CN CN202120255582.3U patent/CN214935392U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405114A (en) * | 2022-09-30 | 2022-11-29 | 中建科技河南有限公司 | A platform for assembling concrete faces building wallboard |
| CN115405114B (en) * | 2022-09-30 | 2024-01-26 | 中建科技河南有限公司 | Platform for assembling concrete temporary building wallboard |
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