CN214994968U - U-shaped connecting assembly for disassembly-free composite heat-insulation template - Google Patents

U-shaped connecting assembly for disassembly-free composite heat-insulation template Download PDF

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CN214994968U
CN214994968U CN202120583714.5U CN202120583714U CN214994968U CN 214994968 U CN214994968 U CN 214994968U CN 202120583714 U CN202120583714 U CN 202120583714U CN 214994968 U CN214994968 U CN 214994968U
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layer
section
heat
straight section
threaded
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蒋金梁
陈依泠
孙平平
蒋俊
苏磊
翁亚君
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Zhejiang Youed Construction Technology Co ltd
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Zhejiang Youed Construction Technology Co ltd
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Abstract

The utility model provides a U-shaped coupling assembling for exempting from to tear open compound incubation template belongs to building materials connecting piece technical field for solve current connecting piece and be difficult to satisfy the efficiency of construction and the technical problem of transportation convenience of exempting from to tear open compound incubation template simultaneously. This U-shaped coupling assembling includes U-shaped bolt and the straight section of connection, U-shaped bolt and the straight section detachable connection of connection, and the end department of U-shaped bolt is provided with the threaded connection section, and the U-shaped bolt is prefabricated as overall structure in exempting from to tear open compound incubation template, and the straight section of connection is connected with the threaded connection section, and the one end of the straight section of connection is provided with the screwed joint with the threaded connection section complex, and the straight section of connection is fixed in cast-in-place reinforced concrete structural layer after concrete placement accomplishes. Adopt sectional type structural design, connect the straight section and install before the construction exempt from to tear open on the compound incubation template, this structure had both guaranteed exempt from to tear open the structural strength and the efficiency of construction of compound incubation template, had also made things convenient for the transportation of exempting from to tear open compound incubation template.

Description

U-shaped connecting assembly for disassembly-free composite heat-insulation template
Technical Field
The utility model belongs to the technical field of the building materials connecting piece, a insulation construction integration technique is related to, specifically is a U-shaped coupling assembling for exempting from to tear open compound incubation template.
Background
Along with the improvement of the living standard of people and the continuous development of society, the requirements of people on the living environment and the comfort level are also continuously improved, the heat insulation structure integration technology can improve the heat insulation performance of the residential building, the durability is as long as the life of the building, and the maintenance cost of heat insulation of the outer wall of the building can be reduced. The heat-insulating structure integration technology accords with the national policy of energy conservation and emission reduction, carries out a profound revolution on the current heat-insulating concept, and can also promote the research of related fields of building and structure major.
The existing building wall heat insulation measure mainly uses an external wall heat insulation technology, and from the construction method and the use condition of the existing external wall heat insulation technology, the existing building heat insulation technology has the following problems:
1. the heat preservation occupies the indoor usage space in the outer wall, and because the ring beam, the floor slab, the constructional column and the like can cause a heat bridge, the heat loss is large.
2. The external wall external heat insulation is greatly influenced by outdoor weather, and the temperature difference between day and night and the temperature difference between winter and summer are large, so that the wall body is easy to crack.
3. The heat preservation and the main structure are separately constructed, the construction period is prolonged, and the construction cost is increased.
4. The density difference between the insulating layer and other materials is too large, the elastic modulus and the linear expansion coefficient between the materials are different, the deformation under the action of temperature stress is also different, and the cracks of the surface layer are easily generated.
5. A cavity is formed between the heat-insulating layer and the main body, and the wind pressure resistance, especially the negative wind pressure resistance, is poor; and a 'priming channel' can be formed quickly in case of fire, and the fire is easy to spread quickly.
6. The external thermal insulation durability of the external wall is poor, the external thermal insulation material is easy to fall off, potential safety hazards exist, regular maintenance is needed in the service life cycle of the building, the cost is increased, and the building quality is reduced.
In order to solve the problems, the technology of the non-dismantling heat-insulating template is continuously developed, the non-dismantling heat-insulating template is prefabricated in a factory, is directly used as an outer wall pouring template during construction, and is used as an outer wall heat-insulating and cast-in-place reinforced concrete structure layer to be fixed to form an integrated structure, and the non-dismantling structural design greatly improves the construction efficiency.
The disassembly-free heat preservation template and the cast-in-place reinforced concrete structural layer need to be connected through connecting pieces, the existing connecting pieces are usually connected through self-made reinforced bar pieces or standard hardware connecting pieces, the mounting forms of the connecting pieces are usually two, one is that the connecting pieces are prefabricated in the disassembly-free heat preservation template, and the connecting pieces need to be inserted into the cast-in-place reinforced concrete structural layer, so that the connecting pieces extend out of the disassembly-free heat preservation template for a long time, and are inconvenient to transport; the other type is that the connecting piece is installed on the non-dismantling heat preservation template and then poured during construction, the structure increases the workload, and the structural strength and the connection stability are correspondingly reduced.
Therefore, the U-shaped connecting assembly for the disassembly-free composite heat-insulation template needs to be designed, the heat-insulation structure integrated design of the disassembly-free composite heat-insulation template is matched, the defects of the existing building heat-insulation technology are overcome, the disassembly-free composite heat-insulation template is convenient to transport, and the connecting strength and the construction efficiency of the disassembly-free composite heat-insulation template can be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having above-mentioned problem to current technique, having proposed a U-shaped coupling assembling for exempting from to tear open compound incubation template, the technical problem that the device will solve is: how to improve joint strength and the efficiency of construction of exempting from to tear open compound incubation template, make things convenient for the transportation of exempting from to tear open compound incubation template simultaneously.
The purpose of the utility model can be realized by the following technical proposal:
the utility model provides a U-shaped coupling assembling for exempting from to tear open compound incubation template, including U-shaped bolt and connection straight section, U-shaped bolt and connection straight section releasable connection, the end department of U-shaped bolt is provided with the threaded connection section, the U-shaped bolt fastening is in exempting from to tear open compound incubation template, the threaded connection section stretches out exempting from to tear open compound incubation template's terminal surface, it is connected with the threaded connection section to connect straight section, the one end of connecting straight section is provided with the screwed connection section complex screwed joint with the threaded connection section, it fixes in cast-in-place reinforced concrete structure layer to connect straight section after concrete placement accomplishes.
The disassembly-free composite heat-insulation formwork comprises a protective layer, a heat-insulation layer and a bonding layer, wherein a steel wire mesh is arranged in the protective layer, the open end of a U-shaped bolt sequentially penetrates through the steel wire mesh, the heat-insulation layer and the bonding layer and extends out of the end face of the bonding layer, and the bonding layer is connected with a cast-in-place reinforced concrete structure layer.
The protective layer is made of light aggregate or reinforced concrete, the thickness of the protective layer is 15-60mm, the structural strength of the surface layer of the template can be enhanced by the protective layer, the structure is more stable, the template is not easy to crack and damage, and the service life is prolonged; the diameter of the steel wire in the steel wire mesh is 3-4mm, and the size of the grid in the steel wire mesh is 50-100 mm; the thickness of the heat-insulating layer is 30-150mm, and the heat-insulating layer is made of fireproof heat-insulating materials; the bonding layer is a cement mortar layer, the thickness of the bonding layer is 5-15mm, and the bonding layer is used for fixing the heat-insulating layer, so that the non-dismantling composite heat-insulating template forms a stable heat-insulating structure, the structural stability is enhanced, the transportation and the construction are convenient, the bonding performance between the non-dismantling composite heat-insulating template and the cast-in-place reinforced concrete structure layer is enhanced, and the surface layer structure of the wall body is more stable; the specific thicknesses of the protective layer, the insulating layer and the bonding layer are set according to the use environment of the heat-insulating layer.
The nut is installed on the threaded connection section, the nut is located on the outer side of the bonding layer, a gasket is arranged between the nut and the bonding layer, and the threaded connector is installed on the outer side of the nut.
The structure more than adopting sets up the nut on the threaded connection section and is used for consolidating protective layer, heat preservation and tie coat, prevents separation between layers in transportation and the installation, drops, increases the structural stability who exempts from to tear open compound incubation template.
The length of the threaded connecting section extending out of the bonding layer is 45-65mm, the length of the threaded joint is 40-60mm, and the threaded section of the threaded connecting section can be completely screwed into the threaded joint 3 after the nut is installed on the threaded connecting section.
The middle connecting section of the U-shaped bolt is a straight section, the threaded connecting sections are positioned on two sides of the straight section, the structure is different from the structure of the existing U-shaped bolt, and the middle connecting section of the existing U-shaped bolt is an arc transition section, so that the U-shaped bolt is not convenient to fix in a non-dismantling composite heat-insulating template; the straight section structure in the middle of the U-shaped bolt is convenient to connect with a steel wire mesh, and the connection stability of the non-dismantling composite heat-insulating template is enhanced.
The length of the connecting straight section is determined according to the thickness of the cast-in-place reinforced concrete structure layer, namely the anchoring length of the non-dismantling composite heat-insulating template and the cast-in-place reinforced concrete structure layer; the length of the U-shaped bolt is determined according to the thickness of the non-dismantling composite heat-insulating template, and the diameter of the U-shaped bolt is 6-8 mm.
The threaded connector is provided with a clamping groove, the threaded connector is convenient to rotate due to the clamping groove, and the straight section is convenient to connect and install.
Compared with the prior art, the U-shaped connecting component has the following advantages:
1. this U-shaped coupling assembling adopts sectional type structural design, and the U-shaped bolt is prefabricated as overall structure in exempting from to tear open compound incubation template, connects the straight section and passes through screwed joint and U-shaped bolt releasable connection, connects on the straight section is installed exempting from to tear open compound incubation template before the construction, simple structure, simple to operate, the transportation of being convenient for.
2. The disassembly-free composite heat-insulation template adopting the U-shaped connecting assembly is constructed, and the connecting straight section is positioned in a cast-in-place reinforced concrete structure layer and is condensed with the cast-in-place reinforced concrete structure layer into a whole, so that the disassembly-free composite heat-insulation template is fixed on the outer side of a concrete shear wall without disassembly and is directly used for external heat insulation of the reinforced concrete wall body, a heat insulation system is firmly connected with a main structure, the durability of the heat insulation system is improved, the integration of the heat insulation structure is realized, and the problem that the existing external wall heat insulation system falls off due to the insecure connection is avoided.
3. The gasket and the nut are arranged on the outer side of the bonding layer for fixing, so that the structural stability of the non-dismantling composite heat-insulation template is improved, and the phenomena of cracking, separation and falling off between layers in the transportation and installation processes of the non-dismantling composite heat-insulation template are prevented; the length of the U-shaped connecting assembly extending out of the surface of the non-dismantling composite heat-insulation template is greatly shortened after the connecting straight section is dismantled, the structural strength and the construction efficiency of the non-dismantling composite heat-insulation template are guaranteed, and the non-dismantling composite heat-insulation template is convenient to transport and stack.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the connection between the non-dismantling composite heat-insulating formwork of the present invention;
FIG. 3 is an enlarged schematic view of the connection between the non-dismantling composite heat-insulating formwork of the present invention;
FIG. 4 is a schematic structural view of the demolition-free composite heat-preservation formwork after construction;
in the figure: the concrete structure comprises 1-U-shaped bolts, 101-threaded connecting sections, 2-connecting straight sections, 3-threaded connectors, 301-clamping grooves, 4-gaskets, 5-nuts, 6-protective layers, 7-steel wire meshes, 8-insulating layers, 9-bonding layers and 10-cast-in-place reinforced concrete structure layers.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-4, the present embodiment provides a U-shaped connection assembly for a disassembly-free composite thermal insulation formwork, including a U-shaped bolt 1 and a connection straight section 2, the U-shaped bolt 1 and the connection straight section 2 are detachably connected, a threaded connection section 101 is disposed at an end of the U-shaped bolt 1, the U-shaped bolt 1 is fixed in the disassembly-free composite thermal insulation formwork, the threaded connection section 101 extends out of an end surface of the disassembly-free composite thermal insulation formwork, the connection straight section 2 is connected with the threaded connection section 101, a threaded joint 3 matched with the threaded connection section 101 is disposed at one end of the connection straight section 2, and the connection straight section 2 is fixed in a cast-in-place reinforced concrete structure layer 10 after concrete pouring is completed.
The disassembly-free composite heat-insulation formwork comprises a protective layer 6, a heat-insulation layer 8 and a bonding layer 9, a steel wire mesh 7 is arranged in the protective layer 6, the open end of the U-shaped bolt 1 sequentially penetrates through the steel wire mesh 7, the heat-insulation layer 8 and the bonding layer 9 and extends out of the end face of the bonding layer 9, and the bonding layer 9 is connected with a cast-in-place reinforced concrete structure layer 10.
The protective layer 6 is made of light aggregate or reinforced concrete, the thickness of the protective layer is 15-60mm, the structural strength of the surface layer of the template can be enhanced by the protective layer 6, the structure is more stable, the template is not easy to crack and damage, and the service life is prolonged; the diameter of steel wires in the steel wire mesh 7 is 3-4mm, and the size of grids in the steel wire mesh is 50-100 mm; the thickness of the heat-insulating layer 8 is 30-150mm, and the heat-insulating layer 8 is made of fireproof heat-insulating materials; the bonding layer 9 is a cement mortar layer, the thickness of the bonding layer 9 is 5-15mm, and the bonding layer 9 is used for fixing the heat-insulating layer, so that the non-dismantling composite heat-insulating template forms a stable heat-insulating structure, the structural stability is enhanced, the transportation and the construction are convenient, the bonding performance between the non-dismantling composite heat-insulating template and the cast-in-place reinforced concrete structure layer is enhanced, and the surface layer structure of the wall body is more stable; the specific thicknesses of the protective layer 6, the insulating layer 8 and the adhesive layer 9 are set according to the use environment thereof.
The threaded connection section 101 is provided with a nut 5, the nut 5 is positioned on the outer side of the bonding layer 9, a gasket 4 is arranged between the nut 5 and the bonding layer 9, and the threaded connector 3 is arranged on the outer side of the nut 5; set up nut 5 and be used for consolidating protective layer 6, heat preservation 8 and tie coat 9, prevent separation between layers, drop in transportation and the installation, increase the structural stability of exempting from to tear open compound incubation template.
The length of the threaded connecting section 101 extending out of the adhesive layer 9 is 45-65mm, the length of the threaded joint 3 is 40-60mm, and the thread section of the threaded connecting section 101 can be completely screwed into the threaded joint 3 after the nut 5 is installed on the threaded connecting section.
The middle connecting section of the U-shaped bolt 1 is a straight section, the threaded connecting sections 101 are positioned on two sides of the straight section, the structure is different from the existing U-shaped bolt structure, and the middle connecting section of the existing U-shaped bolt is an arc transition section, so that the U-shaped bolt is not convenient to fix in a non-dismantling composite heat-insulating template; the straight section structure in the middle of the U-shaped bolt 1 is convenient to connect with the steel wire mesh 7, and the connection stability of the disassembly-free composite heat-insulation template is enhanced.
The length of the connecting straight section 2 is determined according to the thickness of the cast-in-place reinforced concrete structural layer 10, namely the anchoring length of the non-dismantling composite heat-insulating template and the cast-in-place reinforced concrete structural layer 10; the length of the U-shaped bolt 1 is determined according to the thickness of the non-dismantling composite heat-insulating template, and the diameter of the U-shaped bolt 1 is 6-8 mm.
Threaded joint 3 is last to have seted up joint groove 301, sets up joint groove 301 and is convenient for rotate threaded joint 3, conveniently connects the installation of straight section 2.
The disassembly-free composite heat-insulation formwork is a prefabricated part and is prefabricated in a factory, a steel wire mesh 7 is arranged in a protective layer 6, when the protective layer 6 is manufactured, after a U-shaped bolt 1 is fixedly connected with the steel wire mesh 7, the protective layer 6 is poured, a heat-insulation layer 8 is placed above the protective layer 6, the open end of a U-shaped connecting piece 6 penetrates through the heat-insulation layer 8, then an adhesive layer 9 is manufactured, the threaded connecting section 101 at the end part of the U-shaped bolt 1 extends out of the end face of the adhesive layer 9, after the adhesive layer 9 is solidified, a gasket 4 and a nut 5 are arranged on the threaded connecting section 101 to fix the adhesive layer 9, the structure can increase the stability of the integral structure of the disassembly-free composite heat-insulation formwork, effectively prevent the protective layer 6, the heat-insulation layer 8 and the adhesive layer 9 from being separated in the transportation and installation processes, the length of the threaded connecting section 101 extending out of the nut 5 is the reserved length connected with a threaded connector 3, and the extending length of the U-shaped connecting assembly is greatly shortened after the straight connecting section 2 is disassembled, convenient transportation and stacking.
When the cast-in-place reinforced concrete wall structure is constructed, the connecting straight section 2 is firstly installed on the non-dismantling composite heat-insulating template, and then construction is carried out, namely the threaded joint 3 at one end of the connecting straight section 2 is connected with the threaded connecting section 101 at one side of the bonding layer 9; according to the structure of the wall body, the non-dismantling composite heat-insulating template is used as an outer template of the reinforced concrete shear wall to be fixed, the protective layer 6 is positioned on the outer side, the bonding layer 9 is positioned on the inner side, the non-dismantling composite heat-insulating template and an inner template of the wall body form a pouring template structure, and the connecting straight section 2 is positioned between the inner template and the outer template; pouring a reinforced concrete structure layer; after the pouring is finished, the part of the U-shaped connecting assembly, which extends out of the bonding layer 9, is positioned in the cast-in-place reinforced concrete structure layer 10 and is coagulated into a whole with the cast-in-place reinforced concrete structure layer, and the disassembly-free composite heat-insulation template is fixed on the outer side of the cast-in-place concrete shear wall and is directly used for external heat insulation of the reinforced concrete wall body without disassembly. The heat insulation system is firmly connected with the main structure, so that the durability of the heat insulation system is improved, and the integration of the heat insulation structure is realized; the installation is convenient, and the transportation is convenient; the construction efficiency is high, and thermal insulation wall body overall structure stability is strong, is difficult for fracture and damage, and building long service life can save the construction template, practices thrift the cost.
To sum up, the utility model provides a U-shaped coupling assembling for exempting from to tear open compound incubation template adopts sectional type structural design, and U-shaped bolt 1 prefabricates into overall structure in exempting from to tear open compound incubation template, connects straight section 2 through screwed joint 3 with U-shaped bolt 1 releasable connection, connects straight section 2 and installs on exempting from to tear open compound incubation template before the construction, simple structure, and simple to operate is convenient for the transportation; by adopting the disassembly-free composite heat-insulation template of the U-shaped connecting assembly, after construction, the connecting straight section 2 is positioned in the cast-in-place reinforced concrete structure layer 10 and is condensed with the cast-in-place reinforced concrete structure layer into a whole, so that the disassembly-free composite heat-insulation template is fixed on the outer side of a concrete shear wall, does not need to be disassembled, and is directly used for external heat insulation of the reinforced concrete wall, a heat-insulation system is firmly connected with a main structure, the durability of the heat-insulation system is improved, the integration of the heat-insulation structure is realized, and the problem that the existing external wall heat-insulation system falls off due to the insecure connection is avoided; a gasket 4 and a nut 5 are arranged on the outer side of the bonding layer 4 for fixing, so that the structural stability of the non-dismantling composite heat-insulation template is improved, and the phenomena of cracking, separation and falling off between layers in the transportation and installation processes of the non-dismantling composite heat-insulation template are prevented; the length of the U-shaped connecting assembly extending out of the surface of the non-dismantling composite heat-insulation template is greatly shortened after the connecting straight section 2 is dismantled, the structural strength and the construction efficiency of the non-dismantling composite heat-insulation template are guaranteed, and the non-dismantling composite heat-insulation template is convenient to transport and stack.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims (7)

1. The utility model provides a U-shaped coupling assembling for exempting from to tear open compound incubation template, includes U-shaped bolt (1) and connects straight section (2), a serial communication port, U-shaped bolt (1) and connection straight section (2) releasable connection, the end department of U-shaped bolt (1) is provided with threaded connection section (101), U-shaped bolt (1) is fixed in exempting from to tear open compound incubation template, threaded connection section (101) stretch out exempt from to tear open compound incubation template's terminal surface, connect straight section (2) and be connected with threaded connection section (101), the one end of connecting straight section (2) is provided with screwed joint (3) with threaded connection section (101) matched with, it fixes in cast-in-place reinforced concrete structural layer (10) to connect straight section (2) after concrete placement is accomplished.
2. The U-shaped connecting assembly for the disassembly-free composite heat-insulation formwork according to claim 1 is characterized by comprising a protective layer (6), a heat-insulation layer (8) and a bonding layer (9), wherein a steel wire mesh (7) is arranged in the protective layer (6), the open end of the U-shaped bolt (1) sequentially penetrates through the steel wire mesh (7), the heat-insulation layer (8) and the bonding layer (9) and extends out of the end surface of the bonding layer (9), and the bonding layer (9) is connected with a cast-in-place reinforced concrete structure layer (10).
3. The U-shaped connecting assembly for the disassembly-free composite heat-preservation formwork as claimed in claim 2, wherein the protective layer (6) is lightweight aggregate or reinforced concrete, and the thickness of the protective layer is 15-60 mm; the diameter of steel wires in the steel wire mesh (7) is 3-4mm, and the size of grids in the steel wire mesh is 50-100 mm; the thickness of the heat-insulating layer (8) is 30-150mm, and the heat-insulating layer (8) is made of fireproof heat-insulating materials; the bonding layer (9) is a cement mortar layer, and the thickness of the bonding layer (9) is 5-15 mm.
4. The U-shaped connecting assembly for the disassembly-free composite heat-preservation formwork according to claim 3, wherein a nut (5) is installed on the threaded connecting section (101), the nut (5) is located on the outer side of the bonding layer (9), a gasket (4) is arranged between the nut (5) and the bonding layer (9), and the threaded connector (3) is installed on the outer side of the nut (5).
5. The U-shaped connecting assembly for the non-dismantling composite heat-insulating formwork as claimed in claim 4, wherein the length of the threaded connecting section (101) extending out of the adhesive layer (9) is 45-65mm, the length of the threaded joint (3) is 40-60mm, and the thread section of the threaded connecting section (101) can be completely screwed into the threaded joint (3) after the nut (5) is installed on the threaded connecting section.
6. The U-shaped connecting assembly for the disassembly-free composite heat-preservation formwork as claimed in claim 1 or 5, wherein the middle connecting section of the U-shaped bolt (1) is a straight section, and the threaded connecting sections (101) are positioned on two sides of the straight section; the diameter of the U-shaped bolt (1) is 6-8 mm.
7. The U-shaped connecting assembly for the disassembly-free composite heat-insulation formwork as claimed in claim 6, wherein the threaded connector (3) is provided with a clamping groove (301).
CN202120583714.5U 2021-03-23 2021-03-23 U-shaped connecting assembly for disassembly-free composite heat-insulation template Active CN214994968U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892886A (en) * 2022-05-27 2022-08-12 上海上大建筑设计院有限公司 Reinforced concrete beam convenient to adjust

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892886A (en) * 2022-05-27 2022-08-12 上海上大建筑设计院有限公司 Reinforced concrete beam convenient to adjust
CN114892886B (en) * 2022-05-27 2023-09-29 上海上大建筑设计院有限公司 Reinforced concrete beam convenient to adjust

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