CN113463781A - Waterproof insulation construction on building engineering - Google Patents

Waterproof insulation construction on building engineering Download PDF

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Publication number
CN113463781A
CN113463781A CN202110793398.9A CN202110793398A CN113463781A CN 113463781 A CN113463781 A CN 113463781A CN 202110793398 A CN202110793398 A CN 202110793398A CN 113463781 A CN113463781 A CN 113463781A
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CN
China
Prior art keywords
layer
waterproof
heat insulation
heat
building engineering
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110793398.9A
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Chinese (zh)
Inventor
李大伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Sentong Construction Engineering Co ltd
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Anhui Sentong Construction Engineering Co ltd
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Publication date
Application filed by Anhui Sentong Construction Engineering Co ltd filed Critical Anhui Sentong Construction Engineering Co ltd
Priority to CN202110793398.9A priority Critical patent/CN113463781A/en
Publication of CN113463781A publication Critical patent/CN113463781A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/88Insulating elements for both heat and sound
    • E04B1/90Insulating elements for both heat and sound slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/61Connections for building structures in general of slab-shaped building elements with each other
    • E04B1/6108Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
    • E04B1/612Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
    • E04B1/6179Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces with protrusions and recesses on each frontal surface
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66Sealings
    • E04B1/665Sheets or foils impervious to water and water vapor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/94Protection against other undesired influences or dangers against fire
    • E04B1/941Building elements specially adapted therefor
    • E04B1/942Building elements specially adapted therefor slab-shaped

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses a waterproof heat-insulation structure on building engineering, which relates to the technical field of building engineering and aims at solving the problems that the existing waterproof heat-insulation wallboard is time-consuming, labor-consuming and difficult to assemble, has single function and poor using effect. The wallboard body is novel in design and simple to operate, is convenient to install, has the functions of antibiosis, fire prevention, sound insulation and the like, and is extremely high in practicability, good in using effect and high in working efficiency.

Description

Waterproof insulation construction on building engineering
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a waterproof heat-insulating structure on constructional engineering.
Background
The building waterproof engineering is a subsection engineering which ensures that the structure of a building is not affected by water and the internal space is damaged by water, and the building waterproof engineering plays an important role in the whole building engineering. In the schedule life, the wall body of bathroom is changeed damp, and owing to daylighting is not enough to ventilate relatively poorly, and the space is narrow and small in addition, leads to being in moist state throughout the year in the bathroom, very easily breeds the bacterium in this kind of environment and threatens people's healthy, so install the wallboard that has waterproof heat preservation in the bathroom very necessary thing. However, the existing waterproof heat-insulation wallboard is time-consuming, labor-consuming, difficult to assemble, single in function and poor in using effect, and therefore a waterproof heat-insulation structure in building engineering is provided.
Disclosure of Invention
The invention provides a waterproof heat-insulation structure on building engineering, which solves the problems that the existing waterproof heat-insulation wallboard is time-consuming, labor-consuming, difficult to assemble, single in function and poor in use effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a waterproof heat-insulation structure on building engineering comprises a wallboard body, wherein clamping seats are fixedly connected to two sides of the wallboard body, clamping holes are formed in two sides of the wallboard body, a push plate is fixedly connected to the inner wall, close to each other, of one side of each clamping hole, the push plate is matched with the corresponding clamping hole, fixing grooves are formed in the inner walls of the top and the bottom of each clamping hole, sliding grooves are formed in the sides, far away from each other, of the two clamping seats, the push plate is matched with the corresponding sliding grooves, limiting holes are formed in the top and the bottom of each clamping seat, sliding seats are connected in the sliding grooves in a sliding mode, two guide holes are formed in the front side of each sliding seat, cylinders are connected in the guide holes in a sliding mode, limiting seats are fixedly connected to the rear sides of the two cylinders, and are movably connected in the corresponding limiting holes, the wallboard body is divided into an antibacterial layer, a waterproof layer, a heat insulation layer, a fireproof layer and a sound insulation layer, the antibacterial layer and the sound insulation layer are respectively positioned on the top side and the bottom side of the wallboard body, the waterproof layer is positioned at the bottom of the antibacterial layer, the heat insulation layer is positioned at the bottom of the waterproof layer, the fireproof layer is positioned at the bottom of the heat insulation layer, the fireproof layer is positioned at the top of the sound insulation layer, the waterproof layer is divided into a polymer cement layer, a waterproof paper gypsum layer and a cement mortar layer, the waterproof paper gypsum layer is positioned between the polymer cement layer and the cement mortar layer, the heat insulation layer is divided into a rubber-plastic heat insulation layer, a cement mortar layer and an inorganic heat insulation mortar layer, the cement mortar layer is positioned between the rubber-plastic heat insulation layer and the inorganic heat insulation mortar layer, and the cement mortar layer is divided into an inorganic heat insulation mortar layer and a foamed cement heat insulation layer, the inorganic heat-insulation mortar layer is located on the top of the foamed cement heat-insulation layer, the fireproof layer is divided into a magnesium crystal plate layer, a glass fiber layer and a ceramic heat-insulation plate, and the glass fiber layer is located between the magnesium crystal plate layer and the ceramic heat-insulation plate.
Preferably, the top and the bottom of the wallboard body are provided with first threaded holes, the first threaded holes are connected with threaded rods in an internal thread mode, the top of the clamping seat is provided with second threaded holes, and the threaded rods are matched with the second threaded holes.
Preferably, the outer side of the threaded rod is provided with a group of external threads, the first threaded hole and the second threaded hole are internally provided with a group of external threads, and the internal threads are meshed with the external threads.
Preferably, the antibacterial layer is made of a nano silver ion coating and a gypsum partition board, and the nano silver ion coating covers the outer side of the gypsum partition board.
Preferably, the material of the sound insulation layer is provided as sound insulation board, and the material of the sound insulation board is provided as plant fiber.
Preferably, the top and the bottom of the wallboard body are both provided with grooves, and the screw caps are matched with the grooves.
Preferably, the ratio of cement to water in the cement mortar layer is 1: 0.65.
compared with the prior art, the invention has the beneficial effects that:
1. according to the wall board mounting device, the clamping seats and the clamping holes are formed, when two or even a plurality of wall board bodies are clamped, the limiting seats slide into the corresponding limiting holes, the threaded rods are rotated to enable the threaded rods to extend into the corresponding second threaded holes through the first threaded holes, and therefore the wall boards can be mounted very quickly and efficiently;
2. the antibacterial layer, the waterproof layer, the heat insulation layer, the fireproof layer and the sound insulation layer are prepared, and the wall body has the effects of antibiosis, sound insulation, fire prevention and the like on the basis of waterproof heat insulation in a matching manner;
in conclusion, the wall board is novel in design and simple to operate, the wall board body is convenient to install, has the functions of antibiosis, fire prevention, sound insulation and the like, and is extremely high in practicability, good in using effect and high in working efficiency.
Drawings
FIG. 1 is a perspective view of a waterproof and heat-insulating structure for construction engineering according to the present invention;
FIG. 2 is a schematic sectional view of a waterproof and heat-insulating structure in a construction project according to the present invention;
FIG. 3 is a schematic structural view of part A of a waterproof and heat-insulating structure in building engineering according to the present invention;
FIG. 4 is a schematic cross-sectional view of a waterproof and heat-insulating structure in a building engineering according to the present invention;
FIG. 5 is a schematic sectional view of a waterproof layer of a waterproof and heat-insulating structure for construction engineering according to the present invention;
FIG. 6 is a schematic cross-sectional view of a heat insulation layer of a waterproof structure in building engineering according to the present invention;
FIG. 7 is a schematic cross-sectional view of a cement mortar layer of a waterproof and heat-insulating structure in construction engineering according to the present invention;
fig. 8 is a schematic cross-sectional structural view of a fire-proof layer of a waterproof and heat-insulating structure in building engineering according to the present invention.
In the figure: 1. a wall panel body; 2. clamping a seat; 3. clamping the hole; 4. pushing the plate; 5. fixing grooves; 6. a sliding groove; 7. a limiting hole; 8. a sliding seat; 9. a guide hole; 10. a cylinder; 11. a limiting seat; 12. an antimicrobial layer; 13. a waterproof layer; 14. a polymer cement layer; 15. a water-resistant paper-faced gypsum layer; 16. a cement mortar layer; 17. a heat insulation layer; 18. a rubber-plastic heat-insulating layer; 19. a cement mortar layer; 20. an inorganic heat-insulating mortar layer; 21. a foamed cement heat-insulating layer; 22. a fire barrier layer; 23. a magnesium wafer layer; 24. a glass fiber layer; 25. a ceramic insulation board; 26. and a sound insulation layer.
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.
Referring to fig. 1-8, this scheme provides one embodiment: a waterproof heat-insulation structure on building engineering comprises a wall board body 1, wherein both sides of the wall board body 1 are fixedly connected with clamping seats 2, both sides of the wall board body 1 are respectively provided with a clamping hole 3, the inner wall of one side, close to each other, of each clamping hole 3 is fixedly connected with a push plate 4, the push plates 4 are matched with the corresponding clamping holes 3, the inner walls of the top and the bottom of each clamping hole 3 are respectively provided with a fixed groove 5, the sides, far away from each other, of the two clamping seats 2 are respectively provided with a sliding groove 6, the push plates 4 are matched with the corresponding sliding grooves 6, both the top and the bottom of each clamping seat 2 are respectively provided with a limiting hole 7, the sliding grooves 6 are internally and slidably connected with sliding seats 8, the front sides of the sliding seats 8 are provided with two guide holes 9, cylinders 10 are respectively and slidably connected in the two guide holes 9, the rear sides of the two cylinders 10 are respectively and fixedly connected with limiting seats 11, the limiting seats 11 are movably connected in the corresponding limiting holes, the wallboard body 1 is divided into an antibacterial layer 12, a waterproof layer 13, a heat insulation layer 17, a fireproof layer 22 and a sound insulation layer 26, the antibacterial layer 12 and the sound insulation layer 26 are respectively positioned on the top side and the bottom side of the wallboard body 1, the waterproof layer 13 is positioned at the bottom of the antibacterial layer 12, the heat insulation layer 17 is positioned at the bottom of the waterproof layer 13, the fireproof layer 22 is positioned at the bottom of the heat insulation layer 17, the fireproof layer 22 is positioned at the top of the sound insulation layer 26, the waterproof layer 13 is divided into a polymer cement layer 14, a waterproof paper gypsum layer 15 and a cement mortar layer 16, the waterproof paper gypsum layer 15 is positioned between the polymer cement layer 14 and the cement mortar layer 16, the heat insulation layer 17 is divided into a rubber-plastic heat insulation layer 18, a cement mortar layer 19 and an inorganic heat insulation mortar layer 20, the cement mortar layer 19 is positioned between the rubber-plastic heat insulation layer 18 and the inorganic heat insulation mortar layer 20, the cement mortar layer 19 is divided into an inorganic heat insulation mortar layer 20 and a foamed cement heat insulation layer 21, the inorganic heat-preservation mortar layer 20 is located on the top of the foamed cement heat-preservation layer 21, the fireproof layer 22 is divided into a magnesium crystal plate layer 23, a glass fiber layer 24 and a ceramic heat-preservation plate 25, and the glass fiber layer 24 is located between the magnesium crystal plate layer 23 and the ceramic heat-preservation plate 25.
In this embodiment, first screw hole has been seted up with the bottom at 1 top of wallboard body, and first screw hole female connection has the threaded rod, and the second screw hole, threaded rod and second screw hole looks adaptation have been seted up to the top fixedly connected with nut of threaded rod, the top of clamping seat 2.
In this embodiment, the outside of threaded rod is equipped with a set of external screw thread, all is equipped with a set of external screw thread in first screw hole and the second screw hole, and the internal thread meshes with the external screw thread mutually.
In this embodiment, the antibacterial layer 12 is made of a nano silver ion coating and a gypsum partition board, and the nano silver ion coating covers the outer side of the gypsum partition board.
In this embodiment, the material of the soundproof layer 26 is a soundproof plate, and the material of the soundproof plate is plant fiber.
In this embodiment, wallboard body 1's top and bottom all are seted up flutedly, nut and recess looks adaptation.
In this embodiment, the ratio of cement to water in the cement mortar layer 16 is 1: 0.65.
the working principle is that firstly two or even a plurality of wall board bodies 1 are spliced together according to actual needs, the clamping seat 2 is clamped into the corresponding clamping hole 3, the push plate 4 pushes the sliding seat 8 to move, the sliding seat 8 moves to drive the cylinder 10 to move, the two limiting seats 11 are far away from each other and slide into the corresponding fixing groove 5, when the two wall board bodies 1 are in close contact, the threaded rod is rotated, one end of the threaded rod close to each other is rotated into the corresponding second threaded hole, the antibacterial layer 12 can ensure that the wall board bodies 1 do not breed bacteria and mildew in a long-term humid environment, the waterproof layer 13 can ensure that the moistened wall board bodies 1 quickly dilute water molecules in the humid environment, the service life of the wall board bodies 1 is prolonged, the heat insulation layer 17 can keep indoor temperature as much as possible, the temperature in a bathroom can be kept for a period in winter, the fireproof layer 22 can make the enclosed space of the bathroom become a temporary shelter when natural disasters such as fire occur, so that the external temperature is not easy to conduct rapidly, and the sound insulation layer 26 can block noise to make users have better living experience.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. A waterproof heat-insulation structure on building engineering comprises a wallboard body (1) and is characterized in that clamping seats (2) are fixedly connected to two sides of the wallboard body (1), clamping holes (3) are formed in the two sides of the wallboard body (1), a push plate (4) is fixedly connected to the inner wall, close to each other, of one side of each of the two clamping holes (3), the push plate (4) is matched with the corresponding clamping holes (3), fixing grooves (5) are formed in the inner walls of the top and the bottom of each clamping hole (3), sliding grooves (6) are formed in the sides, far away from each other, of the two clamping seats (2), the push plate (4) is matched with the corresponding sliding grooves (6), limiting holes (7) are formed in the top and the bottom of each clamping seat (2), and sliding seats (8) are connected in the sliding grooves (6) in a sliding mode, the wallboard is characterized in that two guide holes (9) are formed in the front side of the sliding seat (8), cylinders (10) are connected in the two guide holes (9) in a sliding mode, limiting seats (11) are fixedly connected to the rear sides of the cylinders (10), the limiting seats (11) are movably connected in the corresponding limiting holes, the wallboard body (1) is divided into an antibacterial layer (12), a waterproof layer (13), a heat insulation layer (17), a fireproof layer (22) and a sound insulation layer (26), the antibacterial layer (12) and the sound insulation layer (26) are respectively located on the top side and the bottom side of the wallboard body (1), the waterproof layer (13) is located at the bottom of the antibacterial layer (12), the heat insulation layer (17) is located at the bottom of the waterproof layer (13), the fireproof layer (22) is located at the bottom of the heat insulation layer (17), and the fireproof layer (22) is located at the top of the sound insulation layer (26), the waterproof layer (13) is divided into a polymer cement layer (14), a waterproof paper surface gypsum layer (15) and a cement mortar layer (16), the waterproof paper surface gypsum layer (15) is located between the polymer cement layer (14) and the cement mortar layer (16), the heat insulation layer (17) is divided into a rubber-plastic heat insulation layer (18), a cement mortar layer (19) and an inorganic heat insulation mortar layer (20), the cement mortar layer (19) is located between the rubber-plastic heat insulation layer (18) and the inorganic heat insulation mortar layer (20), the cement mortar layer (19) is divided into an inorganic heat insulation mortar layer (20) and a foamed cement heat insulation layer (21), the inorganic heat insulation mortar layer (20) is located at the top of the foamed cement heat insulation layer (21), the fireproof layer (22) is divided into a magnesium crystal plate layer (23), a glass fiber layer (24) and a ceramic heat insulation layer (25), the glass fiber layer (24) is located between the magnesium crystal plate layer (23) and the ceramic insulation plate (25).
2. The waterproof and heat-insulating structure on the building engineering as claimed in claim 1, wherein the wallboard body (1) has a first threaded hole at the top and bottom, a threaded rod is connected to the first threaded hole via internal thread, a nut is fixedly connected to the top end of the threaded rod, a second threaded hole is arranged at the top of the clamping seat (2), and the threaded rod is matched with the second threaded hole.
3. The waterproof and heat-insulating structure for building engineering as claimed in claim 1, wherein a set of external threads are provided on the outer side of the threaded rod, a set of external threads are provided in each of the first threaded hole and the second threaded hole, and the internal threads are engaged with the external threads.
4. The waterproof and heat-insulating structure for building engineering as claimed in claim 1, wherein the antibacterial layer (12) is made of nano silver ion coating and gypsum partition, and the nano silver ion coating covers the outer side of the gypsum partition.
5. The waterproof and thermal insulation structure for construction engineering as claimed in claim 1, wherein the material of the sound insulation layer (26) is provided as sound insulation board, and the material of the sound insulation board is provided as plant fiber.
6. The waterproof and heat-insulating structure for the building engineering as claimed in claim 1, wherein the top and the bottom of the wall plate body (1) are both provided with a groove, and the screw cap is matched with the groove.
7. The waterproof and heat-insulating structure for building engineering as claimed in claim 1, wherein the cement-to-water ratio in the cement mortar layer (16) is 1: 0.65.
CN202110793398.9A 2021-07-14 2021-07-14 Waterproof insulation construction on building engineering Pending CN113463781A (en)

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Application Number Priority Date Filing Date Title
CN202110793398.9A CN113463781A (en) 2021-07-14 2021-07-14 Waterproof insulation construction on building engineering

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114922374A (en) * 2022-05-11 2022-08-19 深圳市建筑装饰(集团)有限公司 A assembled gypsum wallboard for building is decorated

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US20040123548A1 (en) * 2001-02-02 2004-07-01 Dixon Gimpel Panel connector system
CN107143086A (en) * 2017-07-14 2017-09-08 俞洁 One kind building Acoustic barrier plate
CN209082748U (en) * 2018-09-30 2019-07-09 黑龙江省华宏力安绿建科技有限公司 A kind of isolating composite plate
CN209163064U (en) * 2018-10-12 2019-07-26 湖北科利节能科技有限公司 A kind of tension rockwool sandwich board
CN111021584A (en) * 2019-12-31 2020-04-17 吉林建筑大学 Assembled wallboard connection structure
CN212802047U (en) * 2020-07-28 2021-03-26 陈秀梅 Building sound insulation building board
CN212866449U (en) * 2020-07-07 2021-04-02 石家庄筑佳节能产品科技有限责任公司 Antibacterial and mildew-proof wall
CN213115099U (en) * 2020-08-20 2021-05-04 常州市国伟钢结构有限公司 Sound-proof steel structure wall
CN213174284U (en) * 2020-08-13 2021-05-11 上海全筑建筑装饰集团股份有限公司 Connecting piece of assembled interior wall system
CN213572435U (en) * 2020-08-06 2021-06-29 四川南方美创防水科技有限公司 Composite heat-insulating board

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040123548A1 (en) * 2001-02-02 2004-07-01 Dixon Gimpel Panel connector system
CN107143086A (en) * 2017-07-14 2017-09-08 俞洁 One kind building Acoustic barrier plate
CN209082748U (en) * 2018-09-30 2019-07-09 黑龙江省华宏力安绿建科技有限公司 A kind of isolating composite plate
CN209163064U (en) * 2018-10-12 2019-07-26 湖北科利节能科技有限公司 A kind of tension rockwool sandwich board
CN111021584A (en) * 2019-12-31 2020-04-17 吉林建筑大学 Assembled wallboard connection structure
CN212866449U (en) * 2020-07-07 2021-04-02 石家庄筑佳节能产品科技有限责任公司 Antibacterial and mildew-proof wall
CN212802047U (en) * 2020-07-28 2021-03-26 陈秀梅 Building sound insulation building board
CN213572435U (en) * 2020-08-06 2021-06-29 四川南方美创防水科技有限公司 Composite heat-insulating board
CN213174284U (en) * 2020-08-13 2021-05-11 上海全筑建筑装饰集团股份有限公司 Connecting piece of assembled interior wall system
CN213115099U (en) * 2020-08-20 2021-05-04 常州市国伟钢结构有限公司 Sound-proof steel structure wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114922374A (en) * 2022-05-11 2022-08-19 深圳市建筑装饰(集团)有限公司 A assembled gypsum wallboard for building is decorated

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Application publication date: 20211001

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