CN111255211A - Regularization can have enough to meet need formula construction elevator steel platform - Google Patents
Regularization can have enough to meet need formula construction elevator steel platform Download PDFInfo
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- CN111255211A CN111255211A CN202010224475.4A CN202010224475A CN111255211A CN 111255211 A CN111255211 A CN 111255211A CN 202010224475 A CN202010224475 A CN 202010224475A CN 111255211 A CN111255211 A CN 111255211A
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- platform
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- ramp
- ceiling
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
- E04G1/152—Platforms made of metal or with metal-supporting frame
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
- E04G1/04—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means the members being exclusively poles, rods, beams, or other members of similar form and simple cross-section
- E04G1/06—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means the members being exclusively poles, rods, beams, or other members of similar form and simple cross-section comprising members with rod-like or tubular portions fitting together end to end, with or without separate connecting pieces
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G27/00—Temporary arrangements for giving access from one level to another for men or vehicles, e.g. steps, ramps
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
- E04G2001/155—Platforms with an access hatch for getting through from one level to another
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a shaped recyclable construction elevator steel platform, which comprises a construction platform (2) fixed on the ground (1), a ramp (3) and a protective shed (4); the construction platform is formed by splicing a group of platform support legs (5) with the same structure and size and a steel platform (6); the ramp is formed by splicing two steel platforms, a connecting steel plate (8), a series of ramp supporting legs (7) with the height decreasing according to the arithmetic progression and a triangular cushion block (9); the protective shed is formed by assembling a group of pillars (10) with equal height, a group of upper-layer ceilings (11), a group of lower-layer ceilings (12) and a group of guardrails (13). The invention has the characteristics of convenient construction, light weight, high strength, high safety performance and no influence on the floor structure. The invention avoids the disordering of environmental pollution around the platform and creates a good construction environment. The main components of the invention can be used interchangeably. The assembly and disassembly are convenient and quick. The main parts are convenient to stack, package and transport after being disassembled.
Description
Technical Field
The invention relates to a stereotyped recyclable construction elevator steel platform, and belongs to the technical field of civil and industrial building construction equipment.
Background
The existing masonry construction elevator platform has great pollution to the surrounding environment, does not meet the requirement of environment-friendly green construction, and needs to be further improved.
Disclosure of Invention
The invention aims to provide a finalized turnover construction elevator steel platform to solve the problem that the existing masonry construction elevator platform pollutes the surrounding environment greatly, and therefore the defects of the prior art are overcome.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a shaped recyclable construction elevator steel platform, which comprises a construction platform, a ramp and a protective shed, wherein the construction platform, the ramp and the protective shed are fixed on the ground; the construction platform is formed by assembling a group of platform support legs with the same structure and size and a steel platform; the ramp is formed by splicing two steel platforms, a connecting steel plate, a series of ramp support legs with the height decreasing according to the arithmetic progression and a triangular cushion block; the protection canopy is assembled by a set of pillar that the height equals, a set of upper ceiling, a set of lower floor's ceiling and a set of guardrail and forms.
In the finalized turnover type construction elevator steel platform, the steel platform comprises an I-shaped steel rectangular frame, the I-shaped steel rectangular frame is provided with longitudinal beams and a group of cross beams, and the top surface of the I-shaped steel rectangular frame is provided with a group of steel bars; the top surfaces of the group of square steel rods are paved with steel plates; the I-shaped steel rectangular frames are provided with splicing holes for connecting the platform support legs and connecting the two I-shaped steel rectangular frames into a whole.
In the finalized recyclable construction elevator steel platform, the platform support leg and the ramp support leg respectively comprise a center pillar, inclined struts are arranged on two sides of the top of the center pillar, and the other ends of the inclined struts on two sides of the center pillar are respectively welded with one side of the bottom of the side pillar; the lower ends of the middle columns and the side columns are provided with foot supporting plates, the foot supporting plates are provided with bolt holes, and the bolt holes are connected with the ground angle bolts; horizontal assembling plates are arranged at the top ends of the middle column and the side column of the platform supporting leg; inclined assembling plates are arranged at the top ends of the middle column and the side column of the ramp support leg; the horizontal assembling plate and the inclined assembling plate are both provided with assembling holes; the splicing holes are all vertical to the upper surfaces of the horizontal splicing plates and the inclined splicing plates.
In the finalized turnover construction elevator steel platform, the lower end of the strut is provided with a supporting foot plate, the supporting foot plate is provided with a bolt hole, and the bolt hole is connected with a ground angle bolt; an upper cross brace and a lower cross brace are arranged on two opposite sides or one side of the upper part of the strut, and an upper layer ceiling is arranged on the upper cross brace; the lower cross brace is provided with a lower ceiling; the upper layer ceiling and the lower layer ceiling comprise ceiling frames; a white iron sheet is laid on the ceiling frame of the upper ceiling; and tile steel plates are paved on the ceiling framework of the lower-layer ceiling.
Due to the adoption of the technical scheme, compared with the prior art, the invention adopts the circularly-used shaped construction elevator steel platform to replace the existing masonry construction elevator platform, thereby avoiding the disordering of environmental pollution around the platform and creating a good construction environment. The invention adopts the standardized design, which is convenient for manufacturing and the interchange use of the main parts. The assembly and disassembly are convenient and quick. The main parts are mainly flat plates, rod-shaped and easy-to-stack parts after being disassembled, and are convenient to package and transport. The invention has the characteristics of convenient construction, light weight, high strength, high safety performance and no influence on the floor structure.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the ramp;
FIG. 3 is a schematic structural view of a construction platform;
FIG. 4 is a schematic structural view of a steel platform;
FIG. 5 is a schematic structural view of a platform foot;
FIG. 6 is a schematic structural view of the top end of the ramp leg;
fig. 7 is a schematic view showing a connection structure between the upper and lower ends and the upper end of the pillar and the ceiling.
The figures are labeled as follows: 1-ground, 2-construction platform, 3-ramp, 4-protective shed, 5-platform support leg, 6-steel platform, 7-ramp support leg, 8-connecting steel plate, 9-triangular cushion block, 10-support column, 11-upper ceiling, 12-lower ceiling, 13-guardrail, 14-I-steel rectangular frame, 15-longitudinal beam and 16-cross beam, 17-square steel bar, 18-steel plate, 19-splicing holes, 20-center column, 21-diagonal brace, 22-side column, 23-foot supporting plate, 24-bolt hole, 25-ground angle bolt, 26-horizontal splicing plate, 27-inclined splicing plate, 28-white iron sheet, 29-tile steel plate, 30-upper cross brace, 31-lower cross brace and 32-ceiling frame.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention discloses a shaped recyclable construction elevator steel platform, which comprises a construction platform 2 fixed on the ground 1, a ramp 3 and a protective shed 4, as shown in figures 1-7. As shown in fig. 3, the construction platform 2 is formed by splicing a group of platform support legs 5 with the same structure and size and a steel platform 6; the ramp 3 is formed by splicing two steel platforms 6, a connecting steel plate 8, a series of ramp support legs 7 with the height decreasing according to the number of arithmetic progression and a triangular cushion block 9 as shown in figure 2; as shown in fig. 1, the protection shed 4 is formed by assembling a group of pillars 10 with equal height, a group of upper ceilings 11, a group of lower ceilings 12 and a group of guardrails 13. As shown in fig. 4, the steel platform 6 comprises an i-steel rectangular frame 14, the i-steel rectangular frame 14 is provided with longitudinal beams 15 and a group of cross beams 16, and the top surface of the i-steel rectangular frame 14 is provided with a group of square steel bars 17; a steel plate 18 is laid on the top surface of the group of square steel bars 17; the I-shaped steel rectangular frames 14 are provided with splicing holes 19 for connecting the platform support legs 5 and connecting the two I-shaped steel rectangular frames 14 into a whole. As shown in fig. 5, each of the platform leg 5 and the ramp leg 7 includes a central pillar 20, inclined struts 21 are provided at two sides of the top of the central pillar 20, and the other ends of the inclined struts 21 at two sides of the central pillar 20 are respectively welded to one side of the bottom of a side pillar 22; the lower ends of the middle column 20 and the side columns 22 are respectively provided with a supporting foot plate 23, the supporting foot plates 23 are provided with bolt holes 24, and the bolt holes 24 are connected with a corner bolt 25; horizontal assembling plates 26 are arranged at the top ends of the central column 20 and the side columns 22 of the platform support leg 5; the top ends of the central column 20 and the side columns 22 of the ramp supporting foot 7 are provided with inclined assembling plates 27 as shown in FIG. 6; the horizontal assembling plate 26 and the inclined assembling plate 27 are both provided with assembling holes 19; the assembly holes 19 are perpendicular to the upper surfaces of the horizontal assembly plate 26 and the inclined assembly plate 27. As shown in fig. 7, a foot supporting plate 23 is arranged at the lower end of the strut 10, the foot supporting plate 23 is provided with a bolt hole 24, and the bolt hole 24 is connected with a corner bolt 25; an upper cross brace 30 and a lower cross brace 31 are arranged on two opposite sides or one side of the upper part of the strut 10, and an upper ceiling 11 is arranged on the upper cross brace 30; the lower cross brace 31 is provided with a lower ceiling 12; the upper ceiling 11 and the lower ceiling 12 each include a ceiling frame 32; a white iron sheet 28 is laid on the ceiling frame 32 of the upper-layer ceiling 11; the tile steel plate 29 is laid on the ceiling frame 32 of the lower ceiling 12.
Examples
The embodiment mainly aims to solve the technical problem that the existing masonry construction elevator platform has great pollution to the surrounding environment.
The steel structure regularization turnover type construction elevator steel platform is adopted to replace the existing masonry construction elevator platform. The steel platform of the finalized rotatable construction elevator comprises three main parts, namely a construction platform 2, a ramp 3 and a protective shed 4, which are shown in figure 1. The construction platform 2 is formed by assembling a steel platform 6 and four platform support legs 5 as shown in fig. 3. The ramp 3 is formed by splicing two steel platforms 6, a series of ramp support legs 7 with the height decreasing according to the number of arithmetic progression and a triangular cushion block 9 as shown in figure 2; the two steel platforms 6 are connected into a whole through a connecting plate 8 and are obliquely arranged. The protection canopy 4 is as shown in fig. 1, shelters from construction platform 2 and ramp 3 top through protection canopy 4, prevents that high altitude junk from smashing the injury personnel. The protective shed 4 is formed by assembling a group of pillars 10 with equal height, a group of upper ceilings 11, lower ceilings 12 and guardrails 13. During construction, the whole stereotyped assembly of the recyclable construction elevator steel platform can be quickly completed on site through bolts and temporary spot welding connection. Can dismantle fast after the construction, the steel platform 6, upper ceiling 11, the lower floor ceiling 12 after the dismantlement are platelike structure, and platform stabilizer blade 5 and ramp stabilizer blade 7 also can range upon range of putting together, and pillar 10, guardrail 13 and some square steel bars 17 that spot welding connects temporarily all belong to rod-like structure, can bundle together. The whole assembly parts occupy smaller space after being packaged, and are convenient to package and transport.
In order to realize interchangeability between main components, the steel platform 6 used by the construction platform 2 and the steel platform 6 used by the ramp 3 in the embodiment have the same structure and size and are designed into standard parts by adopting sizing. As shown in FIG. 4, each steel platform 6 is formed by welding 10I-steel into an I-steel rectangular frame 14, the length-width ratio of the I-steel rectangular frame 14 is 2: 1, and in the embodiment, the length of the I-steel rectangular frame 14 is 6 meters, and the width of the I-steel rectangular frame is 3 meters. A longitudinal beam 15 and three cross beams 16 are welded in the middle of the I-steel rectangular frame 14 by adopting I-steel with the same type, so that the welded I-steel rectangular frame 14 and the lower surface are flat surfaces. The distance between the three cross beams 16 is the same as the distance between the longitudinal beam 15 in the length direction of the I-shaped steel rectangular frame 14 and the two side beams in the length direction, and the three cross beams are arranged in a centered and symmetrical mode. To facilitate docking with the ramp 3. Assembling holes 19 are drilled in the middle parts of two ends and two sides of the I-steel rectangular frame 14 so as to be conveniently connected with four platform support legs 5 at the bottom of the I-steel rectangular frame 14. A group of assembling holes 19 are also drilled on the web plates at the two ends of the I-shaped steel rectangular frame 14 so as to be convenient for butting the two steel platforms 6 to be used as the ramp 3. A group of square steel bars 17 with the specification of 50mm multiplied by 50mm are arranged at equal intervals on the top surface of the I-shaped steel rectangular frame 14, and a steel plate 18 is welded on the top surface of the group of square steel bars 17 to be used as a pedal. The whole I-shaped steel rectangular frame 14 can be used as a flat plate type rotatable part, and all welding seams are welded in a full welding mode in order to ensure the strength of the whole I-shaped steel rectangular frame 14.
The four platform feet 5 at the bottom of the I-steel rectangular frame 14 in this example are also modular in design and are identical in structure and size. The concrete structure is shown in fig. 5, and comprises a middle column 20 and two side columns 22 which are made of square steel with the thickness of 100mm multiplied by 100 mm; the distance between the two side posts 22 corresponds to the width of the I-steel rectangular frame 14. Inclined struts 21 with the specification of 50mm multiplied by 50mm are welded on two sides of the top of the central column 20, and the other ends of the inclined struts 21 on two sides of the central column 20 are respectively welded with one side of the bottom of the side column 22; the lower ends of the middle column 20 and the side columns 22 are welded with supporting foot plates 23 with the size of 200mm multiplied by 200mm, a group of bolt holes 24 are drilled on the supporting foot plates 23, and the bolt holes 24 are connected with the ground angle bolts 25; to illustrate the bolt holes 23, only two corner bolts 25 are shown diagonally in fig. 5, and four corner bolts 25 are provided in actual assembly. Horizontal assembling plates 26 are arranged at the top ends of the middle columns 20 and the side columns 22; the horizontal assembling plate 26 is drilled with assembling holes 19 connected with the I-steel rectangular frame 14. The entire platform foot 5 can be used as a rotatable part. In order to ensure the strength of the entire platform foot 5, all the welding seams of the entire platform foot 5 are welded in a full welding manner.
The steel platform 6 is shown in fig. 1, and four platform feet 5 are arranged at the bottom. The bottom of each of the two ends of the steel platform 6 is provided with one, and the bottom of each of the two sides of the steel platform 6 is provided with one. The platform legs 5 at the bottom of the two sides of the steel platform 6 are installed in the center, and the center line of the center post 20 in the platform legs 5 is aligned with the center line of the cross beam 16 in the middle of the steel platform 6 during installation.
The ramp 3 is formed by splicing two butted steel platforms 6, a series of ramp supporting legs 7 with the height decreasing according to the arithmetic progression and a triangular cushion block 9 as shown in figure 2; i-shaped steel webs on two sides of the two steel platforms 6 are connected into a whole through rectangular connecting steel plates 8. The bottom of the two steel platforms 6 is supported by a series of ramp supporting feet 7 with the height decreasing according to the level difference series to form the inclined ramp 3. Because the steel platform 6 has a certain thickness, a triangular cushion block 9 is arranged at the joint of the steel platform 6 and the ground 1. The triangular cushion block 9 is formed by welding steel plates.
The structure of a series of ramp legs 7 with the height decreasing in an arithmetic progression is basically the same as that of the four platform legs 5 arranged at the bottom of the steel platform 6. Different points as shown in fig. 6, the top ends of the center pillar 20 and the side pillars 22 of the ramp leg 7 are welded with inclined assembling plates 27 instead of the horizontal assembling plates 26. The inclined assembling plate 27 is drilled with assembling holes 19 connected with the I-steel rectangular frame 14. The assembling holes 19 should be perpendicular to the upper surface of the inclined assembling plate 27.
The protective shed 4 is formed by assembling a group of pillars 10 with equal height, a group of upper ceilings 11, lower ceilings 12 and guardrails 13 as shown in fig. 1. The support post 10 is made of square steel with the length of 4480mm and the specification of 200mm multiplied by 200 mm. The pillars 10 are evenly distributed along the construction platform 2 and the outer side of the ramp 3 at equal intervals. Fig. 7 is a schematic structural view of a part of the shelter 4. A supporting foot plate 23 is welded at the lower end of the strut 10, a bolt hole 24 is formed in the supporting foot plate 23, and the bolt hole 24 is connected with a corner bolt 25; the upper cross brace 30 and the lower cross brace 31 are welded on two opposite sides or one side of the upper part of the pillar 10, and the upper cross brace 30 and the lower cross brace 31 are both square steel parts with the thickness of 50mm multiplied by 50 mm. The upper cross brace 30 is provided with an upper ceiling 11; the lower cross brace 31 is provided with a lower ceiling 12; the upper ceiling 11 and the lower ceiling 12 each include a ceiling frame 32; a white iron sheet 28 is laid on the ceiling frame 32 of the upper-layer ceiling 11; the tile steel plate 29 is laid on the ceiling frame 32 of the lower ceiling 12. Specifically, the ceiling frame 32 of the lower ceiling 12 is also designed to have a standardized size.
After the assembly of the protection shed 4 is completed, the guardrails 13 are arranged around the protection shed 4, the guardrails 13 are phi 10 round steel pipes or 10mm multiplied by 10mm square steel pipe components, connecting seats are arranged at two ends of each guardrail 13, and the guardrails 13 are connected with the supporting columns 10 through the connecting seats and screws. The guardrail 13 on the one hand serves to prevent personnel from falling off from the ramp 3 or the construction platform 2 and on the other hand also serves to reinforce the protective shed 4 to prevent the protective shed 4 from shaking.
Claims (4)
1. A shaped and rotatable construction elevator steel platform comprises a construction platform (2) fixed on the ground (1), a ramp (3) and a protective shed (4); the method is characterized in that: the construction platform (2) is formed by splicing a group of platform support legs (5) with the same structure and size and a steel platform (6); the ramp (3) is formed by splicing two steel platforms (6), a connecting steel plate (8), a series of ramp supporting legs (7) with the height decreasing according to the number of arithmetic progression and a triangular cushion block (9); the protective shed (4) is formed by assembling a group of pillars (10) with equal height, a group of upper ceilings (11), a group of lower ceilings (12) and a group of guardrails (13).
2. The finalized rotatable construction elevator steel platform as claimed in claim 1, wherein: the steel platform (6) comprises an I-shaped steel rectangular frame (14), the I-shaped steel rectangular frame (14) is provided with longitudinal beams (15) and a group of cross beams (16), and the top surface of the I-shaped steel rectangular frame (14) is provided with a group of steel bars (17); a steel plate (18) is laid on the top surface of the group steel bar (17); the I-shaped steel rectangular frames (14) are provided with splicing holes (19) for connecting the platform support legs (5) and connecting the two I-shaped steel rectangular frames (14) into a whole.
3. The finalized rotatable construction elevator steel platform as claimed in claim 1, wherein: the platform supporting leg (5) and the ramp supporting leg (7) respectively comprise a center pillar (20), inclined struts (21) are arranged on two sides of the top of the center pillar (20), and the other ends of the inclined struts (21) on two sides of the center pillar (20) are respectively welded with one side of the bottom of a side pillar (22); the lower ends of the middle column (20) and the side columns (22) are respectively provided with a supporting foot plate (23), the supporting foot plates (23) are provided with bolt holes (24), and the bolt holes (24) are connected with the ground angle bolts (25); horizontal assembling plates (26) are arranged at the top ends of the middle column (20) and the side column (22) of the platform support leg (5); inclined assembling plates (27) are arranged at the top ends of the middle column (20) and the side column (22) of the ramp supporting leg (7); the horizontal assembling plate (26) and the inclined assembling plate (27) are both provided with assembling holes (19); the splicing holes (19) are all vertical to the upper surfaces of the horizontal splicing plates (26) and the inclined splicing plates (27).
4. The finalized rotatable construction elevator steel platform as claimed in claim 1, wherein: a supporting foot plate (23) is arranged at the lower end of the strut (10), a bolt hole (24) is formed in the supporting foot plate (23), and the bolt hole (24) is connected with a floor angle bolt (25); an upper cross brace (30) and a lower cross brace (31) are arranged on two opposite sides or one side of the upper part of the strut (10), and an upper layer ceiling (11) is arranged on the upper cross brace (30); the lower cross brace (31) is provided with a lower layer ceiling (12); the upper layer ceiling (11) and the lower layer ceiling (12) both comprise ceiling frames (32); a white iron sheet (28) is paved on the ceiling frame (32) of the upper layer ceiling (11); the tile steel plate (29) is paved on the ceiling frame (32) of the lower layer ceiling (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010224475.4A CN111255211A (en) | 2020-03-26 | 2020-03-26 | Regularization can have enough to meet need formula construction elevator steel platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010224475.4A CN111255211A (en) | 2020-03-26 | 2020-03-26 | Regularization can have enough to meet need formula construction elevator steel platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111255211A true CN111255211A (en) | 2020-06-09 |
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ID=70944399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010224475.4A Pending CN111255211A (en) | 2020-03-26 | 2020-03-26 | Regularization can have enough to meet need formula construction elevator steel platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111255211A (en) |
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2020
- 2020-03-26 CN CN202010224475.4A patent/CN111255211A/en active Pending
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