CN112780012A - Novel sound insulation wall and use method thereof - Google Patents
Novel sound insulation wall and use method thereof Download PDFInfo
- Publication number
- CN112780012A CN112780012A CN202110036221.4A CN202110036221A CN112780012A CN 112780012 A CN112780012 A CN 112780012A CN 202110036221 A CN202110036221 A CN 202110036221A CN 112780012 A CN112780012 A CN 112780012A
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- sound insulation
- keel
- board
- fiber
- galvanized
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- 238000009413 insulation Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003365 glass fiber Substances 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 229920000742 Cotton Polymers 0.000 claims abstract description 6
- 239000002023 wood Substances 0.000 claims abstract description 5
- 239000011094 fiberboard Substances 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 7
- 239000011449 brick Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
- E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
-
- 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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
- E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
- E04B2/7414—Posts or frame members with projections for holding sound or heat insulating fillings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/38—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels
- E04C2/386—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels with a frame of unreconstituted or laminated wood
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Building Environments (AREA)
Abstract
The invention belongs to the technical field of sound insulation systems, and discloses a novel sound insulation wall and a use method thereof.A leveling keel is connected with a sound insulation main keel, the leveling keel and the sound insulation main keel form a closed frame body, and a sound insulation auxiliary keel is crossly arranged in the closed frame body; the front surface of the closed frame body is provided with a sound insulation plate, and the sound insulation plate is provided with a plurality of independent sound insulation plates. Third fibreboards are installed around the glass fibers in the independent sound insulation board, a second fibreboard is installed on the left side of the glass fibers, a first galvanized sheet is installed on the left side of the second fibreboard, and a first fibreboard is installed on the left side of the first galvanized sheet. The invention adopts high-density glass fiber cotton/aluminum silicate fiber to carry out heat energy conversion, and the high-density sound wave rebound can greatly improve the sound wave heat energy conversion efficiency. The sound insulation keel system can be effectively, quickly, simply and conveniently installed and sealed, the keel system is of a steel-wood composite structure, and is extremely low in resonant frequency, high in density reflection and stable in stress support.
Description
Technical Field
The invention belongs to the technical field of sound insulation systems, and particularly relates to a novel sound insulation wall and a using method thereof.
Background
At present, sound insulation is closely related to both professional and common office and household life in daily life, and a high-quality sound insulation system can improve and guarantee that people obtain a high-quality work and living environment. And the sound insulation system is a technical specialty which is difficult to break through in the whole industry at present. There are various bottlenecks in new materials and new process technologies. The mainstream sound insulation system in the market at the present stage is a brick wall, a light wall and a gypsum board wall system; brick wall, light wall and gypsum board wall system have the advantages of simple material, low construction technical requirement, low cost and the like.
However, the existing sound insulation system has the defects of weak comprehensive sound transmission loss capacity, low sound insulation conversion efficiency, high space occupancy rate, long construction period and the like, and is difficult to apply to professional acoustic places or effectively improve sound insulation capacity.
Through the above analysis, the problems and defects of the prior art are as follows: the existing sound insulation system is weak in comprehensive sound transmission loss capacity, low in sound insulation conversion efficiency, high in space occupancy rate and long in construction period, and is difficult to apply to professional acoustic places or effectively improve sound insulation capacity.
The difficulty in solving the above problems and defects is: how to improve the sound insulation and transmission loss capability and reduce the cost and improve the cost performance; and meanwhile, how to solve the technical difficulty of installation and construction.
The significance of solving the problems and the defects is as follows: the invention can effectively reduce the background noise of the space, create an ideal space environment to meet the requirements of working and living, and is also an important process for building energy conservation.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel sound insulation wall and a using method thereof.
The invention is realized in this way, a new sound insulation wall, the new sound insulation wall is provided with leveling keels;
the leveling keel is connected with the sound insulation main keel, the leveling keel and the sound insulation main keel form a closed frame body, and a sound insulation auxiliary keel is installed inside the closed frame body in a crossed mode;
the front surface of the closed frame body is provided with a sound insulation plate, and the sound insulation plate is provided with a plurality of independent sound insulation plates.
Furthermore, a third fiber board is arranged around the glass fiber in the independent sound insulation board, a second fiber board is arranged on the left side of the glass fiber, a first galvanized plate is arranged on the left side of the second fiber board, and a first fiber board is arranged on the left side of the first galvanized plate.
Furthermore, the silica gel strips are pasted on the periphery of the glass fiber, a fourth fiber plate is installed on the right side of the glass fiber, a second galvanized plate is installed on the right side of the fourth fiber plate, and a fifth fiber plate is installed on the right side of the second galvanized plate.
Furthermore, the sound insulation false keel is provided with a sixth fiber plate, the right side of which is a third galvanized plate, the right side of which is a seventh fiber plate, and the right side of which is a first batten.
Furthermore, the sound insulation main joist is provided with an eighth fiber board, the right side of the eighth fiber board is provided with a fourth galvanized plate, the right side of the fourth galvanized plate is provided with a ninth fiber board, and the right side of the ninth fiber board is provided with a second batten.
Another object of the present invention is to provide a method for using the novel sound-proof wall, which comprises:
adopting a 9 mm and 5 mm fiber board composite and a 1 mm galvanized sheet composite to form a sound insulation layer, flexibly adhering the sound insulation layers on the two sides, filling high-density glass fiber cotton, and manufacturing into an independent sound insulation board;
the stressed keel system made of the steel-wood composite structure is installed and constructed by adopting a standard structure, the sound insulation plate and the keel system are in double-layer closed flexible connection, and the amplitude of a single-sided wall body is maximized, so that the low frequency is effectively extended.
By combining all the technical schemes, the invention has the advantages and positive effects that:
the composite sound insulation board is compounded by adopting fiberboards with multiple specifications and a galvanized sheet; filling glass fiber cotton in the reflection region of the double-layer sound insulation layer; the comprehensive sound transmission loss capacity is improved through the matched keel supporting system rapid building and integral sealing process. Meanwhile, the composite sound insulation layer is in double-layer flexible connection, and a middle reflection area of the sound insulation layer is a high-density glass fiber medium; the high-density glass fiber cotton/aluminum silicate fiber is adopted for heat energy conversion, and the high-density sound wave rebounding can greatly improve the sound wave heat energy conversion efficiency. The keel system is of a steel-wood composite structure, has extremely low resonant frequency and high-density reflection, is stably stressed and supported, and can be effectively and quickly built and comprehensively sealed and sealed through standardized design; the integral comprehensive sound transmission loss capacity is improved, and the effective sound transmission loss capacity of the measured single-layer sound insulation wall system can reach 46 decibels.
The sound insulation layer can be used for the ground, the wall surface and the top, and the sound insulation system short plate effect can be reduced by adopting a homogeneous structural design. The comprehensive overall thickness of the sound insulation wall is 106 mm, and the sound transmission loss can be compared with the overall sound transmission loss and sound insulation capacity of a 24-specification red brick wall. The space ratio is only 1/3, and the weight ratio is only 1/11 (the density of the sound insulation wall surface is 57 KG/square meter, and the density of the red brick wall surface is 660 KG/square meter). And the sound insulation capability is far greater than that of light wall and plasterboard wall. Through the analysis, the sound insulation device is high in sound insulation capacity, low in space occupancy rate, light in weight and fast and convenient to install.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a schematic structural view of a novel sound insulation wall provided by an embodiment of the invention.
Fig. 2 is a schematic structural view of a back surface of a sound-proof wall according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a stand-alone sound-insulation board structure provided by an embodiment of the invention.
Fig. 4 is a schematic structural view of a sound insulation false keel provided by an embodiment of the invention.
Fig. 5 is a schematic structural view of each component of the sound insulation cross keel provided by the embodiment of the invention.
Fig. 6 is a schematic structural view of a sound insulation main keel provided by an embodiment of the invention.
Fig. 7 is a schematic structural view of each component of the sound insulation main keel provided by the embodiment of the invention.
Fig. 8 is a sectional view of a sound-proof wall according to an embodiment of the present invention.
In the figure: 1. leveling the keel; 2. an independent sound insulation board; 3. a sound insulation main keel; 4. a sound insulation false keel; 5. a first fiberboard; 6. a first galvanized sheet; 7. a second fiberboard; 8. a third fiberboard; 9. glass fibers; 10. a silica gel strip; 11. a fourth fiberboard; 12. a second galvanized sheet; 13. a fifth fiberboard; 14. a sixth fiberboard; 15. a third galvanized sheet; 16. a seventh fiberboard; 17. a first batten; 18. an eighth fiberboard; 19. a fourth galvanized sheet; 20. a ninth fiberboard; 21. and (5) second battens.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a novel sound insulation wall and a using method thereof, and the invention is described in detail with reference to the attached drawings.
As shown in fig. 1-2, the novel sound insulation wall provided by the embodiment of the invention is provided with leveling keels 1 connected with sound insulation main keels 3, the leveling keels 1 and the sound insulation main keels 3 form a closed frame body, and sound insulation auxiliary keels 4 are installed inside the closed frame body in a crossed manner; the front surface of the closed frame body is provided with a sound insulation plate 2, and the sound insulation plate 2 is provided with a plurality of independent sound insulation plates 2.
The sound insulation system is of a double-layer independent composite structure and is formed by compounding and combining different materials and specifications; the two reflecting layers on the two sides of the sound insulation plate are flexibly adhered; a sound insulation keel system adopts a professional matched keel supporting system, and the whole sound transmission loss capacity of the sound insulation system is effectively improved.
As shown in fig. 3, in the independent sound insulation panel provided in the embodiment of the present invention, third fiber plates 8 are installed around glass fibers 9, a second fiber plate 7 is installed on the left side of the glass fibers 9, a first galvanized plate 6 is installed on the left side of the second fiber plate 7, and a first fiber plate 5 is installed on the left side of the first galvanized plate 6.
Silica gel strips 10 are adhered to the periphery of the glass fiber 9, a fourth fiber plate 11 is installed on the right side of the glass fiber 9, a second galvanized plate 12 is installed on the right side of the fourth fiber plate 11, and a fifth fiber plate 13 is installed on the right side of the second galvanized plate 12.
As shown in fig. 4 to 5, the sound insulation false keel 4 provided in the embodiment of the present invention is provided with a third galvanized sheet 15 on the right side of a sixth fiberboard 14, a seventh fiberboard 16 on the right side of the third galvanized sheet 15, and a first batten 17 on the right side of the seventh fiberboard 16.
As shown in fig. 6 to 7, the sound insulation main keel provided in the embodiment of the present invention is provided with an eighth fiberboard 18, a fourth galvanized sheet 19 on the right side, a ninth fiberboard 20 on the right side of the fourth galvanized sheet 19, and a second batten 21 on the right side of the ninth fiberboard 20.
The working principle of the invention is as follows: according to the invention, the sound insulation layer is formed by compounding the 9 mm +5 mm fiber board and the 1 mm-thick galvanized plate, the sound insulation layers on the two sides are flexibly adhered, and high-density glass fiber cotton is filled to manufacture the independent sound insulation board. The stressed keel system made of the steel-wood composite structure has strong supporting force and narrow resonance frequency, and is an optimal scheme in a flexible keel wall. Adopt standard construction installation construction, the acoustic baffle is double-deck sealed flexonics with the fossil fragments system, and the amplitude maximize of single face wall body is effective to the low frequency extension. The invention utilizes the multiple composite flexible structure of the sound insulation wall body to carry out sound energy high-density heat energy conversion, thereby improving the comprehensive sound transmission loss capability. The standardized structural member can be quickly installed and closed for construction.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a novel sound insulation wall, its characterized in that, novel sound insulation wall is provided with:
leveling the keel;
the leveling keel is connected with the sound insulation main keel, the leveling keel and the sound insulation main keel form a closed frame body, and a sound insulation auxiliary keel is installed inside the closed frame body in a crossed mode;
the front surface of the closed frame body is provided with a sound insulation plate, and the sound insulation plate is provided with a plurality of independent sound insulation plates.
2. The novel sound insulation wall as claimed in claim 1, wherein a third fiber board is arranged around the glass fiber in the independent sound insulation board, a second fiber board is arranged on the left side of the glass fiber, a first galvanized board is arranged on the left side of the second fiber board, and a first fiber board is arranged on the left side of the first galvanized board.
3. The novel sound insulation wall as claimed in claim 2, wherein a silica gel strip is adhered around the glass fiber, a fourth fiber plate is installed on the right side of the glass fiber, a second galvanized plate is installed on the right side of the fourth fiber plate, and a fifth fiber plate is installed on the right side of the second galvanized plate.
4. The novel sound insulation wall as claimed in claim 1, wherein the sound insulation auxiliary keel is provided with a sixth fiber board, the right side of the sixth fiber board is provided with a third galvanized board, the right side of the third galvanized board is provided with a seventh fiber board, and the right side of the seventh fiber board is provided with a first batten.
5. The novel sound insulation wall as claimed in claim 1, wherein the sound insulation main keel is provided with an eighth fiber board, the right side of the eighth fiber board is provided with a fourth galvanized board, the right side of the fourth galvanized board is provided with a ninth fiber board, and the right side of the ninth fiber board is provided with a second batten.
6. A use method of the novel sound insulation wall according to any one of claims 1 to 5, wherein the use method of the novel sound insulation wall comprises the following steps:
adopting a 9 mm and 5 mm fiber board composite and a 1 mm galvanized sheet composite to form a sound insulation layer, flexibly adhering the sound insulation layers on the two sides, filling high-density glass fiber cotton, and manufacturing into an independent sound insulation board;
the stressed keel system made of the steel-wood composite structure is installed and constructed by adopting a standard structure, the sound insulation plate and the keel system are in double-layer closed flexible connection, and the amplitude of a single-sided wall body is maximized, so that the low frequency is effectively extended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110036221.4A CN112780012A (en) | 2021-01-12 | 2021-01-12 | Novel sound insulation wall and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110036221.4A CN112780012A (en) | 2021-01-12 | 2021-01-12 | Novel sound insulation wall and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112780012A true CN112780012A (en) | 2021-05-11 |
Family
ID=75755338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110036221.4A Pending CN112780012A (en) | 2021-01-12 | 2021-01-12 | Novel sound insulation wall and use method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN112780012A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016440A1 (en) * | 1999-08-31 | 2001-03-08 | Owens Corning | System for retrofitting a wall to increase sound attenuation |
| CN105089181A (en) * | 2014-05-15 | 2015-11-25 | 北新集团建材股份有限公司 | Double-row keel sound-isolation wall body |
| CN205012505U (en) * | 2015-06-18 | 2016-02-03 | 江苏建筑职业技术学院 | High sound insulation lightweight wall structure |
| JP2018053680A (en) * | 2016-09-30 | 2018-04-05 | 大建工業株式会社 | Wall surface structure |
| CN210713368U (en) * | 2019-06-14 | 2020-06-09 | 深圳市奇信集团股份有限公司 | Sound-absorbing partition wall |
| CN111379361A (en) * | 2018-12-27 | 2020-07-07 | 贵州富乐森整体定制家具有限公司 | Assembled high-sound-insulation wall and assembling method thereof |
| CN111827522A (en) * | 2020-06-29 | 2020-10-27 | 北新集团建材股份有限公司 | Wall structure |
| CN216892979U (en) * | 2021-01-12 | 2022-07-05 | 倪斌 | Novel sound insulation wall |
-
2021
- 2021-01-12 CN CN202110036221.4A patent/CN112780012A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016440A1 (en) * | 1999-08-31 | 2001-03-08 | Owens Corning | System for retrofitting a wall to increase sound attenuation |
| CN105089181A (en) * | 2014-05-15 | 2015-11-25 | 北新集团建材股份有限公司 | Double-row keel sound-isolation wall body |
| CN205012505U (en) * | 2015-06-18 | 2016-02-03 | 江苏建筑职业技术学院 | High sound insulation lightweight wall structure |
| JP2018053680A (en) * | 2016-09-30 | 2018-04-05 | 大建工業株式会社 | Wall surface structure |
| CN111379361A (en) * | 2018-12-27 | 2020-07-07 | 贵州富乐森整体定制家具有限公司 | Assembled high-sound-insulation wall and assembling method thereof |
| CN210713368U (en) * | 2019-06-14 | 2020-06-09 | 深圳市奇信集团股份有限公司 | Sound-absorbing partition wall |
| CN111827522A (en) * | 2020-06-29 | 2020-10-27 | 北新集团建材股份有限公司 | Wall structure |
| CN216892979U (en) * | 2021-01-12 | 2022-07-05 | 倪斌 | Novel sound insulation wall |
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