Adsorption type bamboo and wood fiber integrated wallboard and ALC wall connecting structure and construction method

Abstract

The invention discloses a connecting structure of an adsorption type bamboo and wood fiber integrated wallboard and an ALC wall body and a construction method, and belongs to the technical field of building enclosure. The connecting structure comprises an ALC wall body, a salt-fog-resistant HDPE film laid on the outer side of the AL wall body, a galvanized light steel keel fixed to the ALC wall body through self-tapping screws sleeved with EPDM salt-resistant rubber pads, magnetic attraction points fixed to the outer side of the galvanized light steel keel, and a surface layer composite wall plate formed by gluing a metal attraction layer and a bamboo and wood fiber wall plate. And the surface layer composite wall board is detachably fixed through adsorption matching of the metal adsorption layer and the magnetic adsorption points. During construction, the HDPE film is laid firstly, then the galvanized light steel keel and the magnetic attraction points are installed, and finally the surface layer composite wallboard is attracted and fixed. The problem that a coastal environment connecting structure is easy to corrode is solved through multiple salt-fog-resistant protection design, tool-free rapid disassembly and assembly are achieved through magnetic attraction type connection, and excellent weather resistance, high assembly efficiency and convenient maintenance performance are achieved.

Description

Technical Field

[0001] This invention relates to the field of building envelope technology, specifically to a connection structure and construction method for an adsorbent bamboo and wood fiber integrated wall panel and an ALC wall. Background Technology

[0002] Autoclaved aerated concrete (ALC) wall panels have become widely used enclosure components in prefabricated buildings due to their lightweight, high strength, and thermal insulation properties. Bamboo and wood fiber wall panels, with their environmentally friendly characteristics and good decorative properties, are often used as interior and exterior building materials. However, in harsh environments such as coastal areas with high temperatures, high humidity, and high salt spray, existing wall connection technologies have significant shortcomings.

[0003] First, traditional metal connectors lack specific salt spray corrosion resistance designs, making them prone to rusting during use, leading to decreased connection strength or even failure. Simultaneously, the sealing of the connection nodes between the ALC wall and the surface wall panel is poor, allowing salt spray to easily penetrate the connection interface and accelerate structural damage. Second, in existing technologies, the fixing of the surface wall panel to the base layer mostly uses adhesive or screw penetration fixing, which not only involves a large amount of on-site wet work and low construction efficiency but also hinders the later maintenance and replacement of the wall panel. Furthermore, conventional adhesives often contain harmful substances such as formaldehyde, failing to meet the low-carbon and environmentally friendly requirements of green buildings. Therefore, there is an urgent need to develop a new wall connection structure that can adapt to the harsh coastal environment and achieve efficient assembly and convenient maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a connection structure and construction method for adsorption-type bamboo and wood fiber integrated wall panels and ALC walls suitable for coastal environments with high salt spray and high humidity.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An adsorption-type bamboo and wood fiber integrated wall panel connection structure with an ALC wall includes an ALC wall. The outer surface of the ALC wall is covered with a salt spray resistant HDPE film and a galvanized light steel keel is fixed to it by self-tapping screws. An EPDM salt-resistant rubber pad is fitted on the self-tapping screw and between the self-tapping screw head and the galvanized light steel keel. Magnetic adsorption points are fixed on the side of the galvanized light steel keel away from the ALC wall, and a surface composite wall panel is adsorbed to it through the magnetic adsorption points. The surface composite wall panel is formed by adhesively fixing a metal adsorption layer and a bamboo and wood fiber wall panel.

[0007] Furthermore, the thickness of the salt spray resistant HDPE membrane is 0.25-0.3mm. The salt spray resistant HDPE membrane is laid on the surface of the ALC wall, and its edges are glued with butyl tape. The overlap width between membranes is not less than 50mm.

[0008] Furthermore, the galvanized light steel keel is a U-shaped keel with a galvanized layer thickness of not less than 85μm, a keel section height of 50-75mm, a flange width of 15-20mm, a web thickness of 1.2-1.5mm, and multiple galvanized light steel keels are arranged at equal intervals along the height direction of the ALC wall, with a spacing of 400-600mm.

[0009] Furthermore, the self-tapping screws are made of galvanized material, with a nominal diameter of 4.2-5.5mm. The depth of the self-tapping screw embedded in the ALC wall is not less than 50mm. Multiple self-tapping screws are arranged along the length of the galvanized light steel keel with a spacing of 150-200mm.

[0010] Furthermore, the EPDM salt-resistant rubber pad has a circular structure with a diameter 8-10mm larger than the head diameter of the self-tapping screw. The thickness of the EPDM salt-resistant rubber pad is 3mm, and the Shore hardness is 50-60 degrees.

[0011] Furthermore, the magnetic attraction points are N35 to N52 grade neodymium iron boron permanent magnets, and the magnetic attraction points are surrounded by 304 stainless steel sleeves with a thickness of 1.2mm. The bottom of the 304 stainless steel sleeves is attached with a 1mm thick EPDM salt-resistant rubber pad. Multiple magnetic attraction points are arranged at equal intervals along the length of the galvanized light steel keel, with a spacing of 200-300mm.

[0012] Furthermore, the metal adsorption layer is made of galvanized steel sheet with a thickness of 1.0-1.2 mm, the galvanized layer thickness is not less than 12 μm, and the surface is passivated.

[0013] Furthermore, the thickness of the bamboo and wood fiber wall panel is 8-12mm, the density is 0.8-1.0g / cm³, and the water absorption expansion rate is less than or equal to 2%.

[0014] Furthermore, the adhesive used in the bonding process is a formaldehyde-free polyurethane adhesive specifically designed for coastal areas, with a solid content of not less than 95% and a tensile shear strength of not less than 3.5 MPa.

[0015] A construction method for a connection structure between an absorbent bamboo-wood fiber integrated wall panel and an ALC wall includes the following steps:

[0016] S1. Substrate treatment and protective layer laying: Clean the surface of the ALC wall and lay a salt spray resistant HDPE membrane on the outer surface of the ALC wall.

[0017] S2. Installation of galvanized light steel keel and magnetic attraction points: Attach the galvanized light steel keel to the surface of the salt spray resistant HDPE membrane, put the EPDM salt resistant rubber pad on the head of the self-tapping screw, fix the galvanized light steel keel to the ALC wall with the self-tapping screw, and fix the magnetic attraction points to the side of the galvanized light steel keel away from the ALC wall with bolts.

[0018] S3. Adsorption and fixing of surface composite wall panel: The prefabricated surface composite wall panel is moved to the installation position with its metal adsorption layer facing the magnetic adsorption point. The surface composite wall panel is fixed to the ALC wall by magnetic adsorption between the magnetic adsorption point and the metal adsorption layer.

[0019] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0020] This invention constructs a complete salt spray corrosion resistant system through a multi-layered protective design, including an HDPE film on the ALC wall surface, galvanized light steel keel and self-tapping screws, EPDM salt-resistant rubber pads, and magnetic stainless steel inlays. This effectively solves the problem of easy corrosion and failure of connection structures in high-salt-spray coastal environments, significantly extending the service life of the enclosure system. The magnetic connection method enables tool-free, rapid assembly and disassembly of the surface wall panels and the ALC wall. The wall panels can be prefabricated in the factory; on-site work requires only two dry steps: keel installation and wall panel adsorption, greatly improving construction efficiency, shortening the construction cycle, and providing significant convenience for later wall panel inspection and replacement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention;

[0022] Attached diagram labels: 1. ALC wall, 2. Galvanized light steel keel, 3. Magnetic attraction point, 4. Composite wall panel. Detailed Implementation

[0023] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0024] like Figure 1 As shown in the figure, this embodiment provides a connection structure between an adsorption-type bamboo and wood fiber integrated wall panel and an ALC wall, including an ALC wall 1. The outer surface of the ALC wall 1 is covered with a salt spray resistant HDPE film, and a galvanized light steel keel 2 is fixed to it by self-tapping screws. An EPDM salt-resistant rubber pad is fitted on the self-tapping screw and between the self-tapping screw head and the galvanized light steel keel 2. A magnetic attraction point 3 is fixed on the side of the galvanized light steel keel 2 away from the ALC wall 1, and a surface composite wall panel 4 is adsorbed through the magnetic attraction point 3. The surface composite wall panel 4 is formed by adhesively fixing a metal adsorption layer and a bamboo and wood fiber wall panel.

[0025] The thickness of the salt spray resistant HDPE membrane is 0.25-0.3mm. The salt spray resistant HDPE membrane is laid on the surface of ALC wall 1, and its edges are glued with butyl tape. The overlap width between membranes is not less than 50mm.

[0026] The galvanized light steel keel 2 is a U-shaped keel with a galvanized layer thickness of not less than 85μm. The keel section height is 50-75mm, the flange width is 15-20mm, and the web thickness is 1.2-1.5mm. Multiple galvanized light steel keels 2 are arranged at equal intervals along the height direction of the ALC wall 1, with a spacing of 400-600mm.

[0027] The self-tapping screws are made of galvanized material with a nominal diameter of 4.2-5.5mm. The depth of the self-tapping screw embedded in the ALC wall is not less than 50mm. Multiple self-tapping screws are arranged along the length of the galvanized light steel keel with a spacing of 150-200mm.

[0028] The EPDM salt-resistant rubber pad has a circular structure, with a diameter 8-10mm larger than the head diameter of the self-tapping screw. The thickness of the EPDM salt-resistant rubber pad is 3mm, and the Shore hardness is 50-60 degrees.

[0029] The magnetic attraction point 3 is a neodymium iron boron permanent magnet of grade N35 to N52. The magnetic attraction point 3 is surrounded by a 304 stainless steel sleeve with a thickness of 1.2mm. The bottom of the 304 stainless steel sleeve is attached with a 1mm thick EPDM salt-resistant rubber pad. Multiple magnetic attraction points 3 are arranged at equal intervals along the length of the galvanized light steel keel with a spacing of 200-300mm.

[0030] The metal adsorption layer is made of galvanized steel sheet with a thickness of 1.0-1.2 mm, a zinc coating thickness of not less than 12 μm, and a passivated surface.

[0031] The thickness of bamboo and wood fiber wall panels is 8-12mm, the density is 0.8-1.0g / cm³, and the water absorption expansion rate is less than or equal to 2%.

[0032] The adhesive used in the bonding process is a formaldehyde-free polyurethane adhesive specifically for coastal areas, with a solid content of not less than 95% and a tensile shear strength of not less than 3.5 MPa.

[0033] A construction method for a connection structure between an absorbent bamboo-wood fiber integrated wall panel and an ALC wall includes the following steps:

[0034] S1. Substrate treatment and protective layer laying: Clean the surface of ALC wall 1 and lay salt spray resistant HDPE film on the outer surface of ALC wall 1.

[0035] S2. Installation of galvanized light steel keel and magnetic attraction points: Attach galvanized light steel keel 2 to the surface of salt spray resistant HDPE membrane, put EPDM salt resistant rubber pad on the head of self-tapping screw, and fix galvanized light steel keel 2 to ALC wall 1 with self-tapping screw. Magnetic attraction points 3 are fixedly installed on the side of galvanized light steel keel 2 away from ALC wall by bolts.

[0036] S3. Adsorption and fixing of surface composite wall panel: The prefabricated surface composite wall panel 4 is moved to the installation position with its metal adsorption layer facing the magnetic adsorption point 3. The surface composite wall panel 4 is fixed to the ALC wall 1 by magnetic adsorption between the magnetic adsorption point 3 and the metal adsorption layer.

[0037] This invention constructs a complete salt spray corrosion resistant system through a multi-layered protective design, including an HDPE film on the ALC wall surface, galvanized light steel keel and self-tapping screws, EPDM salt-resistant rubber pads, and magnetic stainless steel inlays. This effectively solves the problem of easy corrosion and failure of connection structures in high-salt-spray coastal environments, significantly extending the service life of the enclosure system. The magnetic connection method enables tool-free, rapid assembly and disassembly of the surface wall panels and the ALC wall. The wall panels can be prefabricated in the factory; on-site work requires only two dry steps: keel installation and wall panel adsorption, greatly improving construction efficiency, shortening the construction cycle, and providing significant convenience for later wall panel inspection and replacement.

[0038] The above description is merely a preferred embodiment of the present invention and does not limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A connection structure between an adsorption-type bamboo and wood fiber integrated wall panel and an ALC wall, characterized in that: The wall includes an ALC wall, the outer surface of which is covered with a salt spray resistant HDPE membrane and is fixed with a galvanized light steel keel by self-tapping screws. An EPDM salt-resistant rubber pad is fitted on the self-tapping screw and between the screw head and the galvanized light steel keel. Magnetic points are fixed on the side of the galvanized light steel keel away from the ALC wall, and the surface composite wall panel is attached to the magnetic points. The surface composite wall panel is made of a metal adsorption layer and a bamboo and wood fiber wall panel, which are fixed together by adhesive.

2. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The thickness of the salt spray resistant HDPE membrane is 0.25-0.3mm. The salt spray resistant HDPE membrane is laid on the surface of the ALC wall, and its edges are glued with butyl tape. The overlap width between membranes is not less than 50mm.

3. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The galvanized light steel keel is a U-shaped keel with a galvanized layer thickness of not less than 85μm. The keel section height is 50-75mm, the flange width is 15-20mm, and the web thickness is 1.2-1.5mm. Multiple galvanized light steel keels are arranged at equal intervals along the height direction of the ALC wall, with a spacing of 400-600mm.

4. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The self-tapping screws are made of galvanized material with a nominal diameter of 4.2-5.5mm. The depth of the self-tapping screw embedded in the ALC wall is not less than 50mm. Multiple self-tapping screws are arranged along the length of the galvanized light steel keel with a spacing of 150-200mm.

5. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The EPDM salt-resistant rubber pad has a circular structure, with a diameter 8-10mm larger than the head diameter of the self-tapping screw. The thickness of the EPDM salt-resistant rubber pad is 3mm, and the Shore hardness is 50-60 degrees.

6. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The magnetic attraction points are N35 to N52 grade neodymium iron boron permanent magnets, and the magnetic attraction points are surrounded by 304 stainless steel sleeves with a thickness of 1.2mm. The bottom of the 304 stainless steel sleeves is attached with a 1mm thick EPDM salt-resistant rubber pad. Multiple magnetic attraction points are arranged at equal intervals along the length of the galvanized light steel keel, with a spacing of 200-300mm.

7. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The metal adsorption layer is made of galvanized steel sheet with a thickness of 1.0-1.2 mm, the zinc coating thickness is not less than 12 μm, and the surface is passivated.

8. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The thickness of bamboo and wood fiber wall panels is 8-12mm, the density is 0.8-1.0g / cm³, and the water absorption expansion rate is less than or equal to 2%.

9. The connection structure between the adsorption-type bamboo and wood fiber integrated wall panel and the ALC wall according to claim 1, characterized in that: The adhesive used in the bonding process is a formaldehyde-free polyurethane adhesive specifically for coastal areas, with a solid content of not less than 95% and a tensile shear strength of not less than 3.5 MPa.

10. A construction method for a connection structure between an adsorption-type bamboo-wood fiber integrated wall panel and an ALC wall, based on any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Substrate treatment and protective layer laying: Clean the surface of the ALC wall and lay a salt spray resistant HDPE membrane on the outer surface of the ALC wall. S2. Installation of galvanized light steel keel and magnetic attraction points: Attach the galvanized light steel keel to the surface of the salt spray resistant HDPE membrane, put the EPDM salt resistant rubber pad on the head of the self-tapping screw, fix the galvanized light steel keel to the ALC wall with the self-tapping screw, and fix the magnetic attraction points to the side of the galvanized light steel keel away from the ALC wall with bolts. S3. Adsorption and fixing of surface composite wall panel: The prefabricated surface composite wall panel is moved to the installation position with its metal adsorption layer facing the magnetic adsorption point. The surface composite wall panel is fixed to the ALC wall by magnetic adsorption between the magnetic adsorption point and the metal adsorption layer.

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