CN114197750A - Ultra-large span prestress string-stretching structure of limited site and construction method thereof - Google Patents
Ultra-large span prestress string-stretching structure of limited site and construction method thereof Download PDFInfo
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- CN114197750A CN114197750A CN202111359551.3A CN202111359551A CN114197750A CN 114197750 A CN114197750 A CN 114197750A CN 202111359551 A CN202111359551 A CN 202111359551A CN 114197750 A CN114197750 A CN 114197750A
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- stretching structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/10—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal prestressed
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0486—Truss like structures composed of separate truss elements
- E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a limited site ultra-large span prestress string stretching structure, which comprises supporting beams, connecting pieces and a cross beam, wherein two ends of the cross beam are respectively and fixedly connected with the supporting beams at two sides, and the lower end of a supporting body is arranged on the cross beam in a propping manner. Setting up a temporary support frame; primary positioning of the support beam and the connecting beam; the connecting piece is fixedly connected with the supporting beam and the connecting beam; mounting the cross beam; dismantling the temporary support frame; the limited site ultra-large span prestress string structure formed by the combination of the supporting beams, the connecting pieces and the cross beams is arranged, so that the supporting beams and the connecting beams are butted through the connecting pieces, and a positioning supporting effect is formed between the V-shaped supporting bodies and the cross beams, so that the overall strength between beam body structures is improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a limited site ultra-large span prestress string-stretching structure and a construction method thereof.
Background
The string structure system has obvious advantages for the construction of a large-span space structure due to the characteristics of simple and clear stress, various structural forms and full utilization of the advantages of two rigid and flexible materials, and the string structure system is increasingly widely applied along with the pulling of more and more large-span space buildings. Due to the characteristics of large self weight, large size, high quality requirement and the like of the components, the construction of the components is easily limited by site conditions and cannot be efficiently implemented, the parallel construction of projects such as curtain walls, roofs and the like can be possibly hindered, a series of influences are brought to the total construction period and the total construction cost of the projects, and the further popularization and application of the components are not facilitated.
Disclosure of Invention
The invention aims to provide a limited site ultra-large span prestressed string-stretching structure and a construction method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a restricted site super large span prestressing force string structure of stretching and construction method thereof, restricted site super large span prestressing force string structure includes:
the supporting beams are of a horn-shaped beam body structure, and a pair of supporting beams are symmetrically arranged;
the connecting beam is arranged between the supporting beams on the two sides;
the connecting beam and the supporting beam are fixedly connected through the connecting piece, a supporting body is fixedly welded on the lower side surface of the connecting piece, and the supporting body is of a V-shaped structure;
the supporting beam is fixedly connected with the two ends of the cross beam respectively, and the lower end of the supporting body is arranged on the cross beam in a propping mode.
Preferably, the mortise is opened to the tip of the back beam, the mortise has all been opened at the both ends of tie-beam, the size of mortise is identical with the size of mortise, and a supporting beam and tie-beam when actually docking, its mortise sets up among the mortise for the embedding.
Preferably, the supporting beam, the connecting beam and the connecting piece are positioned and fixed through bolts and nuts.
Preferably, the edge of lower position mounting hole has seted up locking moving assembly mounting groove, locking moving assembly mounting groove is the notch structure that the cross-section is regular hexagon frame form, and locking moving assembly mounting groove does not run through the connecting piece completely, and the movable groove has been seted up to the both sides of locking moving assembly mounting groove.
Preferably, the anti-loosening assembly is arranged in the anti-loosening assembly mounting groove and comprises a supporting piece, an anti-loosening piece and a limiting assembly.
Preferably, the supporting member is composed of a first supporting plate, a second supporting plate and a supporting spring, the first supporting plate and the second supporting plate are connected through the supporting spring, and the cross section sizes of the first supporting plate and the second supporting plate are matched with the cross section size of the anti-loosening assembly mounting groove.
Preferably, the cross-sectional dimension of the anti-loosening element is matched with the cross-sectional dimension of the anti-loosening element mounting groove, a limiting element mounting groove is formed in the outer side wall of the anti-loosening element, the position where the limiting element mounting groove is formed corresponds to the movable groove, and the limiting element is arranged in the limiting element mounting groove.
Preferably, the limiting assembly is composed of a limiting block, a first supporting body and a second supporting body, the first supporting body and the second supporting body are made of spring steel through casting, the limiting block, the first supporting body and the second supporting body are integrally formed, and when the first supporting body and the second supporting body are in a reset state, the limiting block is arranged in the movable groove.
Preferably, the limiting block is provided with a screw hole, an adjusting screw is screwed in the screw hole and is arranged, the adjusting screw penetrates through the movable groove to be arranged, and when the adjusting screw applies pressure to the limiting block, the limiting block is completely taken in the limiting assembly mounting groove.
The construction method of the ultra-large span prestressed string-stretching structure of the restricted site comprises the following steps:
the method comprises the following steps: setting up a temporary support frame;
step two: the temporary support frame is used for carrying out the initial positioning process on the support beam and the connecting beam;
step three: connecting and fixing process of the connecting piece, the supporting beam and the connecting beam;
step four: mounting the cross beam;
step five: and (5) dismantling the temporary support frame.
Compared with the prior art, the invention has the beneficial effects that:
1. the limited site ultra-large span prestressed string-stretching structure formed by combining the supporting beam, the connecting piece and the cross beam is arranged, so that the supporting beam and the connecting beam are butted through the connecting piece, and a positioning supporting effect is formed between the V-shaped supporting body and the cross beam, so that the overall strength between beam body structures is improved;
2. an anti-loosening assembly mounting groove is formed in the edge of the lower mounting hole, and an anti-loosening assembly formed by combining a supporting piece, an anti-loosening movable piece and a limiting assembly is arranged in the anti-loosening assembly mounting groove, so that the nut is limited by the anti-loosening movable piece, the nut is prevented from loosening, and the stability of the whole structure of the nut is guaranteed;
3. and constitute by stopper, first supporter and second supporter combination through setting spacing subassembly to, thereby through the combined action of first supporter and second supporter, thereby effectively improve the supporting effect to the stopper, thereby guarantee that the embedding that the stopper can be stable among the activity groove, thereby reach and carry out spacing purpose to the stopper, thereby avoid locking moving piece to drop and influence structural stability, and realization that can be very convenient carries out the dismouting to the stopper.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a support beam structure;
FIG. 3 is a schematic view of a connecting beam structure;
FIG. 4 is a schematic view of a cross beam structure;
FIG. 5 is a schematic view of the position of the anti-loosening assembly;
FIG. 6 is an enlarged view of the structure at A in FIG. 5;
FIG. 7 is a half sectional view of the locking member;
FIG. 8 is a schematic structural view of a position-limiting assembly;
fig. 9 is a schematic view of a support structure.
In the figure: the support beam comprises a support beam 1, a connecting beam 2, a connecting piece 3, a cross beam 4, an upper mounting hole 5, a nut groove 6, a lower mounting hole 7, a bolt 8, a nut 9, a support body 10, a mortise 11, a mortise 12, an anti-loosening assembly mounting groove 13, a movable groove 14, an anti-loosening member 15, a support member 16, a first support plate 17, a second support plate 18, a support spring 19, a limiting assembly mounting groove 20, a limiting assembly 21, a limiting block 22, a first support body 23, a second support body 24, a screw hole 25 and an adjusting screw 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution: a limited site ultra-large span prestress string-stretching structure and a construction method thereof are provided, the limited site ultra-large span prestress string-stretching structure comprises:
the supporting beam 1 is of a horn-shaped beam body structure, and a pair of supporting beams 1 are symmetrically arranged;
the connecting beam 2 is arranged between the supporting beams 1 on the two sides;
the connecting beam 2 and the supporting beam 1 are fixedly connected through the connecting piece 3, a supporting body 10 is fixedly welded on the lower side surface of the connecting piece 3, and the supporting body 10 is of a V-shaped structure;
A tongue 11 has been seted up to a supporting beam 1's tip, and first 12 in a twelve earthly branches has all been seted up at the both ends of tie-beam 2, and first 12 in a twelve earthly branches size is identical with the size of tongue 11, and a supporting beam 1 and tie-beam 2 when actual butt joint, and its first 12 in a twelve earthly branches is for imbedding the setting among tongue 11.
Supporting beam 1, tie-beam 2's tip has all been seted up and has been gone up mounting hole 5, and nut groove 6 has been seted up to the upside end of going up mounting hole 5, and next mounting hole 7 has all been seted up at the both ends of connecting piece 3, and next mounting hole 7, the position of going up mounting hole 5 and next mounting hole 7 is corresponding, and all fix a position fixedly through bolt 8 and nut 9 between supporting beam 1, tie-beam 2 and the connecting piece 3.
Locking subassembly mounting groove 13 that moves has been seted up at the edge of lower position mounting hole 7, and locking subassembly mounting groove 13 that moves is the notch structure that the cross-section is regular hexagon frame form, and locking subassembly mounting groove 13 that moves does not run through connecting piece 3 completely, and movable groove 14 has been seted up to the both sides of locking subassembly mounting groove 13 that moves.
The anti-loosening assembly is arranged in the anti-loosening assembly mounting groove 13 and comprises a supporting piece 16, an anti-loosening piece 15 and a limiting assembly 21.
The supporting member 16 is composed of a first supporting plate 17, a second supporting plate 18 and a supporting spring 19, the first supporting plate 17 and the second supporting plate 18 are connected through the supporting spring 19, and the cross-sectional dimensions of the first supporting plate 17 and the second supporting plate 18 are matched with the cross-sectional dimension of the anti-loosening assembly mounting groove 13.
The cross sectional dimension of locking piece 15 is identical with the cross sectional dimension of locking subassembly mounting groove 13 that moves, and seted up spacing subassembly mounting groove 20 on locking piece 15's the lateral wall, the position of seting up of spacing subassembly mounting groove 20 is corresponding setting with movable groove 14, spacing subassembly 21 is for setting up among spacing subassembly mounting groove 20, set up locking subassembly mounting groove 13 that moves through the edge at lower mounting hole 7, and set up by support piece 16 in locking subassembly mounting groove 13 that moves, the locking subassembly that constitutes is made up of locking piece 15 and spacing subassembly 21, thereby spacing nut 9 through locking piece 15, thereby it is not hard up to avoid nut 9 to appear, thereby its whole stability of structure has been guaranteed.
The limiting component 21 is composed of a limiting block 22, a first supporting body 23 and a second supporting body 24, the first supporting body 23 and the second supporting body 24 are both made of spring steel through casting, the limiting block 22, the first supporting body 23 and the second supporting body 24 are integrally formed, and when the first supporting body 23 and the second supporting body 24 are in a reset state, the limiting block 22 is arranged in the movable groove 14.
Screw hole 25 has been seted up on stopper 22, twist in the screw hole 25 and install adjusting screw 26, adjusting screw 26 passes movable groove 14 and sets up, and when adjusting screw 26 applyed pressure to stopper 22, its stopper 22 is for taking in completely among the spacing subassembly mounting groove 20, through setting spacing subassembly 21 to by stopper 22, first supporter 23 and the combination of second supporter 24 constitute, thereby through the combined action of first supporter 23 and second supporter 24, thereby effectively improve the supporting effect to stopper 22, thereby guarantee embedding that stopper 22 can be stable among movable groove 14, thereby reach and carry out spacing purpose to stopper 22, thereby avoid locking piece 15 to drop and influence structural stability, and realization that can be very convenient carries out the dismouting to stopper 22.
The construction method of the ultra-large span prestressed string-stretching structure of the restricted site comprises the following steps:
the method comprises the following steps: setting up a temporary support frame;
step two: the temporary support frame is used for carrying out the initial positioning process on the support beam 1 and the connecting beam 2;
step three: the connecting and fixing process of the connecting piece 3, the supporting beam 1 and the connecting beam 2;
step four: the mounting process of the beam 4;
step five: and (5) dismantling the temporary support frame.
The working principle is as follows: by arranging the limited site ultra-large span prestressed string-stretching structure formed by combining the supporting beam 1, the connecting beam 2, the connecting piece 3 and the crossbeam 4, the supporting beam 1 and the connecting beam 2 are butted through the connecting piece 3, and a positioning supporting function is formed between the V-shaped supporting body 10 and the crossbeam 4, so that the overall strength between beam body structures is improved, the anti-loosening assembly mounting groove 13 is formed at the edge of the lower mounting hole 7, the anti-loosening assembly formed by combining the supporting piece 16, the anti-loosening piece 15 and the limiting assembly 21 is arranged in the anti-loosening assembly mounting groove 13, so that the nut 9 is limited through the anti-loosening piece 15, the loosening of the nut 9 is avoided, the stability of the whole structure is ensured, and the limiting assembly 21 is formed by combining the limiting block 22, the first supporting body 23 and the second supporting body 24, therefore, through the combined action of the first support body 23 and the second support body 24, the support effect of the limit block 22 is effectively improved, the limit block 22 can be stably embedded into the movable groove 14, the purpose of limiting the limit block 22 is achieved, the situation that the structural stability is affected due to the falling of the anti-loosening part 15 is avoided, the limit block 22 can be conveniently disassembled and assembled, when in practical use, when an installer needs to install the bolt 8 and the nut 9, the installer firstly pushes the adjusting screw 26 upwards and then tightens the nut 9, when the nut 9 is screwed to a quick screwing state, the adjusting screw 26 is put down and then the nut 9 is continuously screwed, when the nut 9 is screwed for a certain angle, due to the support effect of the support part 16, the loosening part 15 falls down, and the limit effect on the nut 9 is completed, thereby ensuring the stability of the whole structure.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a restricted place super large span prestressing force string structure that stretches out which characterized in that: the restricted site super large span prestressing force string structure includes:
the supporting beams (1) are of a horn-shaped beam body structure, and a pair of supporting beams (1) are symmetrically arranged;
the connecting beam (2) is arranged between the supporting beams (1) on the two sides;
the connecting beam (2) is fixedly connected with the supporting beam (1) through the connecting piece (3), a supporting body (10) is fixedly welded on the lower side surface of the connecting piece (3), and the supporting body (10) is of a V-shaped structure;
the supporting device comprises a cross beam (4), wherein two ends of the cross beam (4) are fixedly connected with supporting beams (1) on two sides respectively, and the lower end of a supporting body (10) is arranged on the cross beam (4) in a propping mode.
2. The confined site ultra-large span prestressed string stretching structure of claim 1, wherein: mortise (11) have been seted up to the tip of a supporting beam (1), mortise (12) have all been seted up at the both ends of tie-beam (2), mortise (12) size is identical with the size of mortise (11), and a supporting beam (1) and tie-beam (2) when actual butt joint, and its mortise (12) set up among mortise (11) for the embedding.
3. The confined site ultra-large span prestressed string stretching structure of claim 1, wherein: the utility model discloses a support beam, including supporting beam (1), tie-beam (2), supporting beam, connecting beam, supporting beam (1), mounting hole (5) have all been seted up to the tip of supporting beam (1), tie-beam (2), nut groove (6) have been seted up to the upside end of last mounting hole (5), lower mounting hole (7) have all been seted up at the both ends of connecting piece (3), and lower mounting hole (7), it is corresponding with the position of lower mounting hole (7) to go up mounting hole (5), and all fixes a position fixedly through bolt (8) and nut (9) between supporting beam (1), tie-beam (2) and connecting piece (3).
4. The confined site ultra-large span prestressed string stretching structure of claim 3, wherein: locking subassembly mounting groove (13) that moves has been seted up at the edge of lower mounting hole (7), locking subassembly mounting groove (13) that moves is the notch structure of regular hexagon frame form for the cross-section, and locking subassembly mounting groove (13) that moves does not run through connecting piece (3) completely, and the both sides of locking subassembly mounting groove (13) that moves have seted up movable groove (14).
5. The confined site ultra-large span prestressed string stretching structure of claim 4, wherein: the anti-loosening assembly is arranged in the anti-loosening assembly mounting groove (13) and comprises a supporting piece (16), an anti-loosening piece (15) and a limiting assembly (21).
6. The confined site ultra-large span prestressed string stretching structure of claim 5, wherein: the support piece (16) is composed of a first support plate (17), a second support plate (18) and a support spring (19) in a combined mode, the first support plate (17) is connected with the second support plate (18) through the support spring (19), and the cross sections of the first support plate (17) and the second support plate (18) are matched with the cross section of the anti-loosening assembly installation groove (13).
7. The confined site ultra-large span prestressed string stretching structure of claim 6, wherein: the cross-sectional dimension of the anti-loosening element (15) is matched with that of the anti-loosening element mounting groove (13), a limiting element mounting groove (20) is formed in the outer side wall of the anti-loosening element (15), the position where the limiting element mounting groove (20) is formed corresponds to the movable groove (14), and the limiting element (21) is arranged in the limiting element mounting groove (20).
8. The confined site ultra-large span prestressed string stretching structure of claim 7, wherein: spacing subassembly (21) comprises stopper (22), first supporter (23) and second supporter (24) combination, first supporter (23) and second supporter (24) are the spring steel casting and form, and be integrated into one piece between stopper (22), first supporter (23), the second supporter (24), and when first supporter (23), second supporter (24) were in the reset state, its stopper (22) was for setting up among activity groove (14).
9. The confined site ultra-large span prestressed string stretching structure of claim 8, wherein: the utility model discloses a spacing subassembly installation groove (20) of limiting block, set up screw hole (25) on limiting block (22), twist in screw hole (25) and install adjusting screw (26), adjusting screw (26) pass activity groove (14) and set up, and when adjusting screw (26) exerted pressure to limiting block (22), its limiting block (22) are for taking in completely among spacing subassembly installation groove (20).
10. A construction method of the limited site ultra-large span prestressed string-stretching structure as claimed in any one of claims 1-9, characterized in that: the construction method of the ultra-large span prestressed string-stretching structure of the restricted site comprises the following steps:
the method comprises the following steps: setting up a temporary support frame;
step two: the temporary support frame is used for carrying out the initial positioning process on the support beam (1) and the connecting beam (2);
step three: the connecting and fixing process of the connecting piece (3), the supporting beam (1) and the connecting beam (2);
step four: the mounting process of the cross beam (4);
step five: and (5) dismantling the temporary support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359551.3A CN114197750B (en) | 2021-11-17 | 2021-11-17 | Super-large-span prestress string-tensioning structure for limited site and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359551.3A CN114197750B (en) | 2021-11-17 | 2021-11-17 | Super-large-span prestress string-tensioning structure for limited site and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114197750A true CN114197750A (en) | 2022-03-18 |
| CN114197750B CN114197750B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111359551.3A Active CN114197750B (en) | 2021-11-17 | 2021-11-17 | Super-large-span prestress string-tensioning structure for limited site and construction method thereof |
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Citations (6)
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|---|---|---|---|---|
| JP2002242922A (en) * | 2001-02-19 | 2002-08-28 | Makkusu:Kk | Washer, and screw fastener using the same washer |
| JP2004084353A (en) * | 2002-08-28 | 2004-03-18 | Sumitomo Forestry Co Ltd | Roof truss beam installing structure and roof truss beam installing method |
| CN211735778U (en) * | 2020-02-27 | 2020-10-23 | 广东善建建设股份有限公司 | Large-span beam structure |
| CN211948893U (en) * | 2019-12-02 | 2020-11-17 | 中建钢构有限公司 | Single-layer grid string structure |
| CN213929111U (en) * | 2020-11-30 | 2021-08-10 | 台州三德汽车配件股份有限公司 | Nut with anti-loosening function |
| CN113502983A (en) * | 2021-08-19 | 2021-10-15 | 青岛鲁鹏建筑工程有限公司 | Screw-thread steel connecting piece for building frame |
-
2021
- 2021-11-17 CN CN202111359551.3A patent/CN114197750B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242922A (en) * | 2001-02-19 | 2002-08-28 | Makkusu:Kk | Washer, and screw fastener using the same washer |
| JP2004084353A (en) * | 2002-08-28 | 2004-03-18 | Sumitomo Forestry Co Ltd | Roof truss beam installing structure and roof truss beam installing method |
| CN211948893U (en) * | 2019-12-02 | 2020-11-17 | 中建钢构有限公司 | Single-layer grid string structure |
| CN211735778U (en) * | 2020-02-27 | 2020-10-23 | 广东善建建设股份有限公司 | Large-span beam structure |
| CN213929111U (en) * | 2020-11-30 | 2021-08-10 | 台州三德汽车配件股份有限公司 | Nut with anti-loosening function |
| CN113502983A (en) * | 2021-08-19 | 2021-10-15 | 青岛鲁鹏建筑工程有限公司 | Screw-thread steel connecting piece for building frame |
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| Publication number | Publication date |
|---|---|
| CN114197750B (en) | 2023-07-07 |
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