CN114370114A - Steel structure building heat insulation decorative wall structure and construction method thereof - Google Patents
Steel structure building heat insulation decorative wall structure and construction method thereof Download PDFInfo
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- CN114370114A CN114370114A CN202210123954.6A CN202210123954A CN114370114A CN 114370114 A CN114370114 A CN 114370114A CN 202210123954 A CN202210123954 A CN 202210123954A CN 114370114 A CN114370114 A CN 114370114A
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- wall
- infrared reflection
- decorative
- reflection film
- heat insulation
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- 238000009413 insulation Methods 0.000 title claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 10
- 238000005034 decoration Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 2
- 239000008397 galvanized steel Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 5
- 239000012774 insulation material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a steel structure building heat insulation decorative wall structure and a construction method thereof, wherein the steel structure building heat insulation decorative wall structure comprises vertical wall beams arranged between the wall beams, an additional keel is arranged between the vertical wall beams, a metal surface sandwich board is arranged on the outer side of each vertical wall beam, a heat insulation layer and a decorative inner plate are arranged on the inner side of each additional keel, infrared reflection films are arranged on the inner sides of the metal surface sandwich board and the heat insulation layer, two layers of infrared reflection films form a closed air layer through the wall beams, the steel structure building heat insulation decorative wall structure has a better heat insulation effect, and the inner plate is fixed on the additional keel by using the decorative inner plate. According to the invention, the vertical wall beams are arranged between the infrared reflection film pieces, so that a closed air layer is formed between the vertical wall beams and the infrared reflection film pieces, and the heat insulation performance of the wall body is further improved; the decorative inner plate is a profiled metal plate or an integrated decorative plate with a decorative effect, so that labor is saved, and the decorative effect of the inner side of the wall body is improved.
Description
Technical Field
The invention relates to the technical field of steel structure building construction, in particular to a heat-insulation decorative metal curtain wall structure and a construction method.
Background
In steel structure buildings, the wall body of an industrial building is mostly a profiled metal sheet wall body compounded on site, an inner plate is a profiled metal sheet, a heat insulation layer is arranged between an outer plate and a wall beam, and the heat insulation layer is generally made of glass wool roll felt; in office buildings and the like, the outer plate is changed into a metal surface sandwich plate, and the inner plate is a pressed metal plate or a calcium silicate plate. During actual installation, the lapping treatment of the heat insulation cotton and the metal plate is not in place, so that the heat insulation layer cannot be effectively and continuously formed easily, and the indoor decoration effect is poor; the outer plate is a metal surface sandwich plate, and the inner plate is a single-layer pressed metal plate, so that the overall thermal insulation performance of the wall is poor, and the cold bridge phenomenon is easy to occur.
Disclosure of Invention
The invention aims to provide a steel structure building heat insulation decorative wall structure and a construction method thereof, and aims to solve the problem of poor heat insulation performance of a wall in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a steel construction building thermal-insulated decoration wall body structure, includes first wall roof beam, the both sides of first wall roof beam are provided with first infrared reflection membrane and second infrared reflection membrane respectively, the surface of first infrared reflection membrane is provided with the insulating layer that keeps warm, the surface of insulating layer that keeps warm is provided with decorates the inner panel, the surface of second infrared reflection membrane is provided with the metal covering battenboard.
The utility model discloses a wall structure, including first wall roof beam, first infrared reflection membrane, second wall roof beam and additional fossil fragments, the vertical second wall roof beam and the additional fossil fragments that are provided with on the first wall roof beam, second wall roof beam and the alternate setting of additional fossil fragments, the both sides of second wall roof beam respectively with first infrared reflection membrane and second infrared reflection membrane fixed connection, the lower extreme of additional fossil fragments passes through L type connecting piece and first wall roof beam fixed connection, L type connecting piece (5) are the metal material.
The metal surface sandwich board is provided with a plurality of decorative edge sealing pieces at the joint of the metal surface sandwich boards which are adjacently arranged, the decorative edge sealing pieces are made of one of galvanized steel plates, aluminum alloys and metal materials, and the cross section of each decorative edge sealing piece is T-shaped.
A steel structure building heat insulation decorative wall structure and a construction method thereof are disclosed, the method comprises the following steps:
firstly, manufacturing an outer wall body;
step two, manufacturing an inner wall;
step three, installing an inner wall body and an outer wall body;
and step four, obtaining the heat-insulating decorative wall body.
The manufacturing of the inner wall body and the outer wall specifically comprises the following steps:
101, selecting a first infrared reflection film, a second infrared reflection film, a heat preservation and insulation layer, a decorative inner plate and a metal surface sandwich;
102, bonding a metal surface sandwich board, a second infrared reflection film, a heat insulation layer and a first infrared reflection film; the second infrared reflection film is adhered and fixed with the metal surface sandwich board; the first infrared reflection film is fixedly bonded with the heat insulation layer.
The installation inner wall body and the installation outer wall body specifically comprise;
step 201, manufacturing a connecting piece, and arranging a second wall beam and an additional keel on a first wall beam; sticking self-adhesive heat-insulating gaskets on the vertical surfaces of the second wall beam and the additional keel;
202, splicing the inner wall and the outer wall, connecting the metal surface sandwich board bonded with the second infrared reflection film with a second wall beam by using self-tapping screws, sealing a butt joint gap on the adjacent metal surface sandwich board by using a decorative edge sealing piece, fixing the heat insulation layer bonded with the first infrared reflection film with an additional keel, mounting a decorative inner plate on the surface of the heat insulation layer, and sealing the joint of the first infrared reflection film and the second infrared reflection film by using an aluminum foil adhesive tape;
and step 203, obtaining the heat insulation decorative wall.
Compared with the prior art, the invention has the following advantages:
according to the invention, the second wall beam is arranged between the first infrared reflection film and the second infrared reflection film, so that a closed air layer is formed between the second wall beam and the first infrared reflection film and between the second wall beam and the second infrared reflection film, and the heat insulation performance of the wall body is further improved; the heat preservation insulating layer selects the heat preservation insulating material of self-adhesion first infrared reflection membrane for use, and the material of different materials can be selected according to indoor user demand to the decoration inner panel, and indoor decoration-free uses manpower sparingly, has still improved the inboard decorative effect of wall body simultaneously.
Drawings
FIG. 1 is a schematic view of a heat-insulating decorative wall structure according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic flow chart of the present invention.
In the figure: in the figure: the wall comprises a first wall beam 1, a second wall beam 2, an additional keel 3, a decorative inner plate 4, a 5L-shaped connecting piece, a first infrared reflection film 6-1, a second infrared reflection film 6-2, a metal surface sandwich plate 7, a decorative edge sealing piece 8 and a heat insulation layer 9.
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.
As shown in fig. 1, the invention provides a steel structure building heat insulation decorative wall structure, which comprises a first wall beam 1, wherein a first infrared reflection film 6-1 and a second infrared reflection film 6-2 are respectively arranged on two sides of the first wall beam 1, a heat insulation layer 9 is arranged on the surface of the first infrared reflection film 6-1, the heat insulation layer 9 is used for decorating an inner plate 4, and a metal surface sandwich plate 7 is arranged on the surface of the second infrared reflection film 6-2; a closed air layer is formed between the second wall beam and the first infrared reflection film 6-1 and the second infrared reflection film 6-2, and the heat insulation layer 9 is made of a heat insulation material self-adhered to the first infrared reflection film 6-1, so that the heat insulation performance of the wall body is improved; the decorative inner plate 4 can be made of different materials according to indoor use requirements, such as a colored profiled metal plate, an integrated decorative plate, a gypsum board and the like, and is free of indoor decoration, labor-saving and capable of improving the decorative effect of the inner side of the wall body.
As shown in fig. 2, in this embodiment, the first infrared reflective film 6-1 and the second infrared reflective film 6-2 are both a conductive photoelectric switch reflection ranging reflection photosensitive reflective film automated robot infrared reflector; the metal surface sandwich plate 7 is a profiled metal plate or a decorative integrated plate; in actual installation, the first wall beam 1 is vertically provided with a second wall beam 2 and additional keels 3, the second wall beam 2 and the additional keels 3 are arranged at intervals, the lower end of the second wall beam 2 is respectively welded and connected with the upper end face of the first wall beam 1 and is used for supporting the first infrared reflecting film 6-1 and the second infrared reflecting film 6-2, meanwhile, a sealed air layer is formed between the first infrared reflecting film 6-1 and the second infrared reflecting film 6-2, and the heat insulation performance of the wall body is improved; the two sides of the second wall beam 2 are respectively bonded and fixed with the first infrared reflection film 6-1 and the second infrared reflection film 6-2, the lower end of the additional keel 3 is fixedly connected with the first wall beam 1 through an L-shaped connecting piece 5, and the L-shaped connecting piece 5 can be an angle iron or a galvanized plate bending piece and the like and is used for improving the firmness of the additional keel 3 and the first wall beam 1; the side surface of the additional keel 3 is fixedly bonded with the first infrared reflection film 6-1; the surface of the first infrared reflection film 6-1 is provided with a heat insulation layer 9, the heat insulation layer 9 is fixedly bonded with the first infrared reflection film 6-1, the surface of the heat insulation layer 9 is provided with a decorative inner plate 4, and the decorative inner plate 4 is fixedly connected with the additional keel 3 through a self-tapping screw and used for hiding a wall beam to achieve the effect of indoor decoration; the adjacent metal surface sandwich plates 7 are fixedly connected with the second wall beam 2 through self-tapping screws, and decorative edge sealing pieces 8 are arranged at the transverse joint of the metal surface sandwich plates 7; the decorative edge sealing piece 8 is made of profiled steel plates, stainless steel or aluminum profiles, the cross section of the decorative edge sealing piece 8 is T-shaped and used for covering the transverse joint of the metal surface sandwich plate 7, and the heat insulation performance and the decorative effect of the wall body are improved.
As shown in fig. 3, a steel structure building heat insulation decorative wall structure and a construction method thereof includes the following steps: firstly, manufacturing an outer wall body; selecting a second infrared reflecting film 6-2 and a metal surface sandwich 7; the metal surface sandwich plate 7 is fixedly bonded with the first infrared reflection film 6-1; step two, manufacturing an inner wall; selecting a first infrared reflection film 6-1, a heat insulation layer 9 and a decorative inner plate 4; the first infrared reflection film 6-1 is adhered and fixed with the heat insulation layer 9; step three, installing an inner wall body and an outer wall body; the spliced inner wall body and the spliced outer wall body specifically comprise a steel plate and a steel plate; manufacturing a connecting piece, and arranging a second wall beam 2 and an additional keel 3 on the first wall beam 1; a self-adhesive heat insulation gasket is pasted between the second wall beam 2 and the additional keel 3; splicing the inner wall body and the outer wall, connecting the metal surface sandwich plate 7 adhered with the second infrared reflection film 6-2 with the second wall beam 2 by using self-tapping screws, sealing a butt joint gap on the adjacent metal surface sandwich plate 7 by using a decorative edge sealing piece 8, and sealing a joint of the second infrared reflection film 6-2 by using an aluminum foil adhesive tape; fixing the heat-insulating layer 9 adhered with the first infrared reflection film 6-1 on the surface of the additional keel 3, and sealing the joint of the first infrared reflection film 6-1 by using an aluminum foil adhesive tape; and connecting and fixing the decorative inner plate 4 and the additional keel by using self-tapping screws to obtain the heat-insulating decorative wall body.
According to the invention, the second wall beam 2 is arranged between the first infrared reflection film 6-1 and the second infrared reflection film 6-2, so that a closed air layer is formed between the second wall beam 2 and the first infrared reflection film 6-1 and the second infrared reflection film 6-2, and further the heat insulation performance of the wall body is improved; the heat insulation layer 9 is made of a heat insulation material of a self-adhesive first infrared reflection film 6-1, the decorative inner plate 4 can be made of materials of different materials according to indoor use requirements, indoor decoration is omitted, labor is saved, and meanwhile the decoration effect of the inner side of the wall body is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a steel construction building thermal-insulated decoration wall structure which characterized in that: the wall comprises a first wall beam (1), wherein a first infrared reflection film (6-1) and a second infrared reflection film (6-2) are respectively arranged on two sides of the first wall beam (1), a heat insulation layer (9) is arranged on the surface of the first infrared reflection film (6-1), a decorative inner plate (4) is arranged on the surface of the heat insulation layer (9), and a metal surface sandwich plate (7) is arranged on the surface of the second infrared reflection film (6-2).
2. The heat-insulating decorative wall structure of a steel structure building of claim 1, wherein: the utility model discloses a wall structure, including first wall roof beam (1), second wall roof beam (2) and additional fossil fragments (3) are vertically provided with on first wall roof beam (1), second wall roof beam (2) and additional fossil fragments (3) alternate setting, the both sides of second wall roof beam (2) respectively with first infrared reflection membrane (6-1) and second infrared reflection membrane (6-2) fixed connection, the lower extreme of additional fossil fragments (3) is passed through L type connecting piece (5) and is fixed with first wall roof beam (1) and be connected, L type connecting piece (5) are the metal material.
3. The heat-insulating decorative wall structure of a steel structure building of claim 1, wherein: the metal surface sandwich board (7) is provided with a plurality of decorative edge sealing pieces (8), the joint of the metal surface sandwich boards (7) which are adjacently arranged is provided with one of the decorative edge sealing pieces (8) made of galvanized steel plates, aluminum alloys and metal materials, and the cross section of each decorative edge sealing piece (8) is T-shaped.
4. The heat-insulating decorative wall structure of the steel structure building and the construction method thereof according to claim 1 or 3, wherein: the method comprises the following steps:
firstly, manufacturing an outer wall body;
step two, manufacturing an inner wall;
step three, installing an inner wall body and an outer wall body;
and step four, obtaining the heat-insulating decorative wall body.
5. The heat-insulating decorative wall structure of the steel structure building and the construction method thereof according to claim 3, wherein: the manufacturing of the inner wall body and the outer wall specifically comprises the following steps:
101, selecting a first infrared reflection film (6-1), a second infrared reflection film (6-2), a heat preservation and insulation layer (9), a decorative inner plate (4) and a metal surface sandwich (7);
102, bonding a metal surface sandwich board (7), a second infrared reflection film (6-2), a heat insulation layer (9) and a first infrared reflection film (6-1); the second infrared reflection film (6-2) is bonded and fixed with the metal surface sandwich board (7); the first infrared reflection film (6-1) is fixedly bonded with the heat insulation layer (9).
6. The heat-insulating decorative wall structure of the steel structure building and the construction method thereof according to claim 3 or 5, wherein: the installation inner wall body and the installation outer wall body specifically comprise;
step 201, manufacturing a connecting piece, and arranging a second wall beam (2) and an additional keel (3) on a first wall beam (1); sticking self-adhesive heat-insulating gaskets on the vertical surfaces of the second wall beam (2) and the additional keel (3);
202, splicing the inner wall body and the outer wall, connecting the metal surface sandwich board (7) bonded with the second infrared reflection film (6-2) with the second wall beam (2) by using self-tapping screws, sealing a butt joint gap on the adjacent metal surface sandwich board (7) by using a decorative edge sealing piece (8), fixing the heat insulation layer (9) bonded with the first infrared reflection film (6-1) with the additional keel (3), installing a decorative inner board (4) on the surface of the heat insulation layer (9), and sealing the joint of the first infrared reflection film (6-1) and the second infrared reflection film (6-2) by using an aluminum foil adhesive tape;
and step 203, obtaining the heat insulation decorative wall.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202210123954.6A CN114370114A (en) | 2022-02-10 | 2022-02-10 | Steel structure building heat insulation decorative wall structure and construction method thereof |
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CN202210123954.6A CN114370114A (en) | 2022-02-10 | 2022-02-10 | Steel structure building heat insulation decorative wall structure and construction method thereof |
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CN202210123954.6A Pending CN114370114A (en) | 2022-02-10 | 2022-02-10 | Steel structure building heat insulation decorative wall structure and construction method thereof |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20090005274A (en) * | 2008-12-18 | 2009-01-13 | 이봉재 | Installation structure of sandwiches panel for decorating a building wall |
CN102094465A (en) * | 2010-12-08 | 2011-06-15 | 中冶建筑研究总院有限公司 | Composite heat-insulating containment system and construction method thereof |
CN206128518U (en) * | 2016-10-27 | 2017-04-26 | 安徽华电工程咨询设计有限公司 | Compound battenboard of metal |
CN111851794A (en) * | 2020-06-30 | 2020-10-30 | 同济大学 | Heat-insulation and decoration integrated light steel keel composite wallboard and manufacturing method thereof |
-
2022
- 2022-02-10 CN CN202210123954.6A patent/CN114370114A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20090005274A (en) * | 2008-12-18 | 2009-01-13 | 이봉재 | Installation structure of sandwiches panel for decorating a building wall |
CN102094465A (en) * | 2010-12-08 | 2011-06-15 | 中冶建筑研究总院有限公司 | Composite heat-insulating containment system and construction method thereof |
CN206128518U (en) * | 2016-10-27 | 2017-04-26 | 安徽华电工程咨询设计有限公司 | Compound battenboard of metal |
CN111851794A (en) * | 2020-06-30 | 2020-10-30 | 同济大学 | Heat-insulation and decoration integrated light steel keel composite wallboard and manufacturing method thereof |
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