A prefabricated sandwich composite wall panel structure

Abstract

The application relates to a prefabricated sandwich composite wallboard structure and relates to the technical field of composite wallboards, which comprises an outer panel, a sandwich layer and an inner panel. First galvanized steel wire meshes and second galvanized steel wire meshes in the sandwich layer are engaged through the penetration of flat-head self-tapping screws through the outer panel, the sandwich layer and into the inner panel, so that the problems of interlayer looseness and delamination of traditional wallboards are avoided, cracks caused by local stress concentration are reduced, the overall structural stability is improved, meanwhile, a connecting convex tenon on one side of a glass-magnesium thermal insulation core material cooperates with a connecting groove on the other side, mechanical engagement splicing can be realized without additional connecting parts, a waterproof sleeve in the connecting groove can simplify the installation steps, solve the positioning difficulty, form a targeted waterproof barrier, avoid water seepage and wear in the splicing joint, and the like; in addition, rubber sealing strips at the edges of the outer panel, the sandwich layer and the inner panel can block the penetration of water vapor and dust and buffer thermal expansion and cold contraction deformation.

Description

Technical Field

[0001] This application relates to the field of composite wall panel technology, and in particular to a prefabricated sandwich composite wall panel structure. Background Technology

[0002] Precast sandwich composite wall panels are widely used in building wall engineering due to their combination of thermal insulation, lightweight, and ease of construction. Their conventional structure typically consists of an outer panel, a sandwich insulation layer, and an inner panel, assembled through bonding or simple connectors. However, existing precast sandwich composite wall panels consistently face a core problem in practical applications: the difficulty in simultaneously meeting the synergistic requirements of structural stability, convenient and precise splicing, and comprehensive protection. This results in low reliability, poor installation efficiency, and high maintenance costs.

[0003] Specifically, in terms of structural stability, the outer panel, core layer and inner panel of traditional wall panels are mostly connected by interface adhesives, lacking a through mechanical fixing structure. After long-term use, delamination may occur due to temperature changes, vibration or external impact. At the same time, the core insulation layer usually does not have an effective reinforcing support structure. When the stress is uneven, it is prone to cracking. The overall impact resistance is weak, and it is difficult to ensure long-term stability.

[0004] The aforementioned problems are interconnected and have existed for a long time, making it difficult for traditional prefabricated sandwich composite wall panels to meet the needs of modern buildings for walls. In order to solve these problems, a prefabricated sandwich composite wall panel structure is proposed. Utility Model Content

[0005] The purpose of this application is to provide a prefabricated sandwich composite wall panel structure that has the effects of structural stability, convenient splicing and excellent protection, thus solving the problems mentioned in the background art.

[0006] This application provides a prefabricated sandwich composite wall panel structure with the following technical solution: A prefabricated sandwich composite wall panel structure includes an outer panel, a core layer, and an inner panel. The outer panel, core layer, and inner panel are stacked sequentially along the thickness direction of the wall panel. Evenly distributed flat-head self-tapping screws are provided between the outer panel, core layer, and inner panel. These flat-head self-tapping screws sequentially pass through the outer panel, core layer, and extend into the inner panel. The outer panel includes a fiber-reinforced cement board. The core layer includes a magnesium oxide insulation core material, a first galvanized steel wire mesh, and two second galvanized steel wire meshes. The magnesium oxide insulation core material is sandwiched between the fiber-reinforced cement board and the inner panel. The first galvanized steel wire mesh and the two second galvanized steel wire meshes are embedded inside the magnesium oxide insulation core material, with the first galvanized steel wire mesh located between the two second galvanized steel wire meshes. The inner panel includes a gypsum composite board installed on one side of the magnesium oxide insulation core material.

[0007] By adopting the above technical solution, the outer panel, sandwich layer, and inner panel can form a stable stacked structure, avoiding the loosening problem caused by the lack of through-fixation between layers in traditional wall panels. The through-type setting of flat-head self-tapping screws can directly connect the three layers in series, preventing delamination of the panel and core material during use. At the same time, the first galvanized steel wire mesh and two second galvanized steel wire mesh inside the sandwich layer can support the glass magnesium insulation core material, reduce cracking caused by uneven stress on the core material, and also disperse the external impact on the wall panel, making the overall structure of the wall panel more stable and solving the problem of weak impact resistance of traditional sandwich wall panels.

[0008] Preferably, the outer panel, the sandwich layer, and the inner panel are fixedly connected by evenly distributed flat-head self-tapping screws, and the flat-head self-tapping screws engage with the first galvanized steel wire mesh and the second galvanized steel wire mesh.

[0009] By adopting the above technical solution, the fixing of the flat-head self-tapping screw no longer relies solely on the interface bonding between the panel and the core material. Instead, it forms a mechanical locking structure through the interlocking with the first and second galvanized steel wire meshes. Even if the interface bonding strength decreases after long-term use, the interlocking between the flat-head self-tapping screw and the first and second galvanized steel wire meshes can still ensure the connection strength of the three-layer structure, further reducing the risk of delamination. At the same time, the interlocking structure allows the force transmitted by the flat-head self-tapping screw to be more evenly distributed to the wire mesh, and then diffused by the first or second galvanized steel wire mesh to the entire glass magnesium insulation core material. This avoids local stress concentration around the flat-head self-tapping screw and reduces the micro-cracks caused by excessive local stress.

[0010] Preferably, the outer panel, the sandwich layer and the inner panel are provided with rubber sealing strips on their exterior surfaces, and the rubber sealing strips cover the edges of the outer panel, the sandwich layer and the inner panel.

[0011] By adopting the above technical solution, the rubber sealing strip can fill the gaps between the outer panel, the core layer and the inner panel, preventing external moisture and dust from seeping into the interior of the wall panel from the edges, and avoiding the core material from becoming damp and deteriorating or dust accumulation affecting the thermal insulation performance.

[0012] Preferably, two connecting tenons are fixedly connected to one side of the inner wall of the glass magnesium insulation core material, and two connecting grooves are formed on one side of the inner wall of the glass magnesium insulation core material.

[0013] By adopting the above technical solution, the connecting tenon of one wall panel can be directly embedded into the connecting groove of another wall panel to form a mechanical interlocking splice, which simplifies the installation steps, reduces the number of parts to be installed on site, and lowers the installation difficulty.

[0014] Preferably, a waterproof sleeve is installed on the inner wall of each of the connecting grooves, and the size of the connecting tenon is adapted to the size of the connecting groove and the waterproof sleeve.

[0015] By adopting the above technical solution, the waterproof sleeve can fit the contact surface of the connecting tenon and the connecting groove, fill the tiny gap between them, form a targeted waterproof barrier, and prevent rainwater from seeping into the core layer from the splice seam.

[0016] Preferably, one end of each of the two connecting tenons is welded to one side of the first galvanized steel wire mesh.

[0017] By adopting the above technical solution, the connecting tenon is no longer only connected to the glass magnesium insulation core material, but is welded to the first galvanized steel wire mesh to form an integral whole. This allows the splicing force on the connecting tenon to be directly transmitted to the first galvanized steel wire mesh, and then distributed by the first galvanized steel wire mesh to the entire glass magnesium insulation core material, thus preventing the connecting tenon from falling off the core material due to concentrated force.

[0018] Preferably, the outer surface of the fiber-reinforced cement board is fitted with an anti-ultraviolet layer.

[0019] By adopting the above technical solution, the UV-resistant layer can directly block outdoor ultraviolet rays from irradiating the fiber-reinforced cement board, avoiding problems such as surface aging, fading, and cracking caused by long-term exposure to ultraviolet rays, and extending the service life of the outer panel.

[0020] Preferably, the inner wall of the gypsum composite board is inlaid with a sound insulation layer.

[0021] By adopting the above technical solutions, the sound insulation layer can form a sound wave barrier inside the gypsum composite board, absorb the noise transmitted from indoors and outdoors, reduce the amount of noise transmitted through the wall panel, and improve the comfort of indoor living or use.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] This prefabricated sandwich composite wall panel structure uses flat-head self-tapping screws that penetrate the outer panel, the sandwich layer, and extend into the inner panel. The first and second galvanized steel wire meshes within the sandwich layer interlock, avoiding the loosening and delamination problems of traditional wall panels and reducing cracks caused by localized stress concentration, thus improving overall structural stability. Simultaneously, the connecting tenon on one side of the magnesium oxide insulation core material mates with the connecting groove on the other side, achieving mechanical interlocking without additional connectors. Combined with the waterproof sleeve within the connecting groove, this simplifies installation, solves positioning difficulties, and forms a targeted waterproof barrier, preventing water seepage and wear at the joints. Furthermore, the rubber sealing strips on the edges of the outer panel, sandwich layer, and inner panel prevent moisture and dust penetration and buffer thermal expansion and contraction. The UV-resistant layer on the fiber-reinforced cement board extends the lifespan of the outer panel, and the sound insulation layer within the gypsum composite board improves indoor comfort without affecting the overall decoration. This comprehensively solves the problems of weak impact resistance, low splicing efficiency, and insufficient protection inherent in traditional wall panels. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall front view structure of this application;

[0025] Figure 2 This is a schematic diagram of the overall rear view structure of this application;

[0026] Figure 3 This is a partial top view of the structure of this application;

[0027] Figure 4 This is a schematic diagram of the cross-sectional planar structure of this application;

[0028] Figure 5 This is a cross-sectional top view of the structure of this application.

[0029] In the picture:

[0030] 1. Outer panel; 101. Fiber-reinforced cement board; 102. UV-resistant layer; 2. Sandwich layer; 201. Magnesium oxide insulation core material; 202. First galvanized steel wire mesh; 203. Second galvanized steel wire mesh; 3. Inner panel; 301. Gypsum composite board; 302. Sound insulation layer; 4. Flathead self-tapping screws; 5. Rubber sealing strip; 6. Connecting tenon; 7. Connecting groove; 8. Waterproof sleeve. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0032] Example 1: A prefabricated sandwich composite wall panel structure, referring to... Figure 3 , Figure 4 and Figure 5The wall panel comprises an outer panel 1, a core layer 2, and an inner panel 3, which are stacked sequentially along the thickness of the wall panel. Evenly distributed flat-head self-tapping screws 4 are provided between the outer panel 1, the core layer 2, and the inner panel 3. These screws pass through the outer panel 1, the core layer 2, and extend into the inner panel 3. The outer panel 1 includes a fiber-reinforced cement board 101, with an UV-resistant layer 102 installed on its outer surface. This UV-resistant layer 102 directly blocks outdoor ultraviolet rays from irradiating the fiber-reinforced cement board 101, preventing surface aging, fading, and cracking caused by long-term UV exposure, thus extending the service life of the outer panel 1. Simultaneously, the UV-resistant layer 102 forms a protective film on the surface of the fiber-reinforced cement board 101, reducing the erosion of the panel surface by rainwater and pollutants, maintaining a clean appearance, reducing later maintenance costs, and solving the problems of weak UV resistance and easy aging of traditional outer panels. The core layer 2 includes a magnesium oxide insulation core material 2. 01. A first galvanized steel wire mesh 202 and two second galvanized steel wire meshes 203 are provided. The glass magnesium insulation core material 201 is sandwiched between the fiber reinforced cement board 101 and the inner panel 3. The first galvanized steel wire mesh 202 and the two second galvanized steel wire meshes 203 are all embedded inside the glass magnesium insulation core material 201, and the first galvanized steel wire mesh 202 is located between the two second galvanized steel wire meshes 203. The inner panel 3 includes a gypsum composite board 301 installed on one side of the glass magnesium insulation core material 201. The inner wall of the gypsum composite board 301 is inlaid with... The sound insulation layer 302 forms a sound wave barrier inside the gypsum composite board 301, absorbing noise transmitted from indoors and outdoors, reducing the amount of noise transmitted through the wall panel, and improving the comfort of indoor living or use. At the same time, the sound insulation layer 302 is embedded in the inner wall of the gypsum composite board 301, which does not occupy indoor space or affect the later wall decoration, keeping the surface of the inner panel 3 flat, avoiding the problem of traditional external sound insulation layers affecting the decoration effect, and solving the problems of poor sound insulation effect of traditional wall panels and sound insulation structure affecting decoration.

[0033] Reference Figure 1 , Figure 2 and Figure 4The outer panel 1, the core layer 2, and the inner panel 3 are fixedly connected by evenly distributed flat-head self-tapping screws 4. The flat-head self-tapping screws 4 engage with the first galvanized steel wire mesh 202 and the second galvanized steel wire mesh 203. By adopting this technical solution, the fixing of the flat-head self-tapping screws 4 no longer relies solely on the interface bonding between the panel and the core material, but rather forms a mechanical locking structure through engagement with the first galvanized steel wire mesh 202 and the second galvanized steel wire mesh 203. Even if the interface bonding strength decreases after long-term use, the engagement between the flat-head self-tapping screws 4 and the first galvanized steel wire mesh 202 and the second galvanized steel wire mesh 203 still ensures the connection strength of the three-layer structure, further reducing the risk of delamination. Simultaneously, the engagement structure allows the force transmitted by the flat-head self-tapping screws 4 to be more evenly distributed onto the wire mesh, and then diffused by the first galvanized steel wire mesh 202 or the second galvanized steel wire mesh 203 to... The entire magnesium oxide insulation core material 201 avoids localized stress concentration around the flat-head self-tapping screws 4, reducing micro-cracks caused by excessive localized stress. Rubber sealing strips 5 are installed on the exterior of the outer panel 1, sandwich layer 2, and inner panel 3. These rubber sealing strips 5 cover the edges of the outer panel 1, sandwich layer 2, and inner panel 3, filling the gaps and preventing external moisture and dust from seeping into the wall panel. This prevents the core material from becoming damp and deteriorating, or dust accumulation from affecting the insulation performance. Simultaneously, the rubber sealing strips 5 are elastic, buffering the overall thermal expansion and contraction caused by temperature changes, reducing cracking caused by deformation and compression at the edges. They also protect the edges of the wall panel during installation, preventing edge damage during handling and splicing, thus solving the problems of unprotected edges in traditional wall panels, which are easily damaged and prone to water ingress.

[0034] Example 2: A prefabricated sandwich composite wall panel structure, referring to... Figure 1 , Figure 2 and Figure 5Based on the same concept as Embodiment 1 above, this embodiment proposes that two connecting tenons 6 are fixedly connected to one side of the inner wall of the glass magnesium insulation core material 201, and two connecting grooves 7 are opened on one side of the inner wall of the glass magnesium insulation core material 201. The connecting tenon 6 of one wall panel can be directly embedded into the connecting groove 7 of another wall panel to form a mechanical interlocking splice, which simplifies the installation steps, reduces the number of parts installed on site, and reduces the installation difficulty. At the same time, the cooperation between the connecting tenon 6 and the connecting groove 7 can play a positioning role for adjacent wall panels, ensuring the flatness and verticality of the wall panels during splicing, avoiding the splicing misalignment caused by inaccurate positioning in traditional bolt connections, and solving the problems of low splicing efficiency and difficult positioning in traditional wall panel splicing. A waterproof sleeve 8 is installed on the inner wall of each connecting groove 7. The size of the connecting tenon 6 is adapted to the size of the connecting groove 7 and the waterproof sleeve 8. The waterproof sleeve 8 can fit the contact surface of the connecting tenon 6 and the connecting groove 7, filling the small gap between them, forming a targeted The waterproof barrier prevents rainwater from seeping into the core layer 2 through the splicing seam. At the same time, the elastic material of the waterproof sleeve 8 increases the tightness of the fit between the connecting tenon 6 and the connecting groove 7, reduces loosening at the splice, and also acts as a buffer when the wall panel is shaken by external force, preventing wear on the splice surface due to hard friction. This solves the problems of poor waterproofing and easy wear of traditional splice seams. One end of each of the two connecting tenons 6 is welded to one side of the first galvanized steel wire mesh 202. The connecting tenon 6 is no longer only connected to the glass magnesium insulation core material 201, but is integrated with the first galvanized steel wire mesh 202 through welding. This allows the splicing force on the connecting tenon 6 to be directly transmitted to the first galvanized steel wire mesh 202, and then distributed by the first galvanized steel wire mesh 202 to the entire glass magnesium insulation core material 201, preventing the connecting tenon 6 from falling off the core material due to concentrated force. At the same time, welding fixation can improve the connection stability between the connecting tenon 6 and the core material. Even if subjected to lateral tension for a long time, it is not easy to loosen or break.

[0035] The implementation principle of this application embodiment is as follows: In the production stage, the first galvanized steel wire mesh 202 and two second galvanized steel wire meshes 203 are first embedded inside the glass magnesium insulation core material 201 according to the positional relationship between the middle and the sides, forming a reinforced support system for the sandwich layer 2. Then, the sandwich layer 2 is sandwiched between the fiber-reinforced cement board 101 of the outer panel 1 and the gypsum composite board 301 of the inner panel 3. The outer panel 1 and the sandwich layer 2 are sequentially inserted by evenly distributed flat-head self-tapping screws 4 and extended into the inner layer. Inside panel 3, flat-head self-tapping screws 4 engage with the first galvanized steel wire mesh 202 and the second galvanized steel wire mesh 203. Through the dual action of mechanical locking and through fixation, the outer panel 1, the sandwich layer 2, and the inner panel 3 are tightly connected into a whole, preventing the layers from loosening or delaminating. Subsequently, an anti-ultraviolet layer 102 is installed on the outer surface of the fiber-reinforced cement board 101, and a sound insulation layer 302 is installed on the inner wall of the gypsum composite board 301. Rubber sealing strips 5 are then wrapped around the edges of the wall panel to complete the prefabrication of the wall panel. During on-site installation, the connecting tenon 6 of one wall panel is aligned with the connecting groove 7 of another wall panel. One end of the connecting tenon 6 is welded to the first galvanized steel wire mesh 202 to ensure force transmission. The tenon 6 and the connecting groove 7 are then inserted into the groove. The cooperation between the connecting tenon 6 and the connecting groove 7 achieves quick positioning and mechanical interlocking splicing without the need for additional connectors. At the same time, the waterproof sleeve 8 on the inner wall of the connecting groove 7 will fit against the surface of the connecting tenon 6, filling the gaps and forming a sealing buffer to prevent rainwater from seeping in and the splicing surface from being worn. During use, the rubber sealing strip 5 will continuously fill the gaps at the edge of the wall panel, blocking the intrusion of water vapor and dust and buffering thermal expansion and contraction deformation. The UV-resistant layer 102 blocks the outdoor ultraviolet rays from corroding the fiber-reinforced cement board 101. The sound insulation layer 302 absorbs noise within the gypsum composite board 301. The steel wire mesh system of the sandwich layer 2 continuously disperses external impacts and stresses, ensuring the overall stability and comprehensive performance of the wall panel.

Claims

1. A prefabricated sandwich composite wall panel structure, comprising an outer panel (1), a sandwich layer (2), and an inner panel (3), characterized in that: The outer panel (1), the sandwich layer (2), and the inner panel (3) are stacked sequentially along the thickness direction of the wall panel. Evenly distributed flat-head self-tapping screws (4) are provided between the outer panel (1), the sandwich layer (2), and the inner panel (3). The flat-head self-tapping screws (4) pass through the outer panel (1), the sandwich layer (2), and extend into the inner panel (3). The outer panel (1) includes fiber-reinforced cement board (101), and the sandwich layer (2) includes magnesium oxide insulation core material (201) and a first galvanized steel wire mesh (…). The first galvanized steel wire mesh (202) and two second galvanized steel wire meshes (203) are sandwiched between the fiber reinforced cement board (101) and the inner panel (3). The first galvanized steel wire mesh (202) and two second galvanized steel wire meshes (203) are embedded inside the glass magnesium insulation core material (201), and the first galvanized steel wire mesh (202) is located between the two second galvanized steel wire meshes (203). The inner panel (3) includes a gypsum composite board (301) installed on one side of the glass magnesium insulation core material (201).

2. The prefabricated sandwich composite wall panel structure according to claim 1, characterized in that: The outer panel (1), the sandwich layer (2) and the inner panel (3) are fixedly connected by evenly distributed flat-head self-tapping screws (4), and the flat-head self-tapping screws (4) engage with the first galvanized steel wire mesh (202) and the second galvanized steel wire mesh (203).

3. The prefabricated sandwich composite wall panel structure according to claim 1, characterized in that: The outer panel (1), the sandwich layer (2) and the inner panel (3) are provided with rubber sealing strips (5), which cover the edges of the outer panel (1), the sandwich layer (2) and the inner panel (3).

4. The prefabricated sandwich composite wall panel structure according to claim 1, characterized in that: Two connecting tenons (6) are fixedly connected to one side of the inner wall of the glass magnesium insulation core material (201), and two connecting grooves (7) are opened on one side of the inner wall of the glass magnesium insulation core material (201).

5. A prefabricated sandwich composite wall panel structure according to claim 4, characterized in that: Each of the connecting grooves (7) has a waterproof sleeve (8) installed on its inner wall, and the size of the connecting tenon (6) is adapted to the size of the connecting groove (7) and the waterproof sleeve (8).

6. The prefabricated sandwich composite wall panel structure according to claim 4, characterized in that: One end of each of the two connecting tenons (6) is welded to one side of the first galvanized steel wire mesh (202).

7. The prefabricated sandwich composite wall panel structure according to claim 1, characterized in that: The outer surface of the fiber-reinforced cement board (101) is fitted with an anti-ultraviolet layer (102).

8. The prefabricated sandwich composite wall panel structure according to claim 1, characterized in that: The inner wall of the gypsum composite board (301) is inlaid with a sound insulation layer (302).

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