Enhanced hollow composite board

Abstract

The utility model relates to composite board technical field, concretely is a kind of reinforced hollow composite board, comprising: hollow skeleton, the hollow skeleton includes front net surface, double helix support frame, rear net surface, front net surface is connected with rear net surface by double helix support frame, double helix support frame is connected to be made of two annular spiral long strip, and castable material is between front net surface and rear net surface;Bolt piece, the bolt piece includes: bolt head, connecting ring, connecting ring is provided on the bolt head, and reinforcing fiber mesh cloth layer is attached to the two side surfaces of hollow skeleton.The utility model is provided with hollow skeleton, front net surface, rear net surface and double helix support frame are combined to form light weight support frame, internal hollow cavity provides accommodating space for castable material, double helix structure can disperse external force, improves the vertical tensile strength and the bending strength of overall resistance to break, and after casting castable material, form skeleton-core material composite structure, give consideration to structural strength and heat preservation, sound insulation and other functional requirements.

Description

Technical Field

[0001] This utility model relates to the field of composite panel technology, specifically to an enhanced hollow composite panel. Background Technology

[0002] In enhanced scenarios, composite panels must simultaneously meet the core requirements of lightweighting and high load-bearing capacity.

[0003] While traditional solid panels have strong load-bearing capacity, their large material consumption and high weight not only increase transportation costs and installation difficulties but also place additional loads on the foundation structure. Although simple hollow structures achieve lightweighting by reducing materials, they lack an effective support system, resulting in insufficient support stiffness and weak buckling resistance. Under external forces, they are prone to local instability. This is similar to building a load-bearing frame with thin-walled hollow tubes. Although the tubes are light, they are easy to bend under stress because the single hollow structure cannot effectively distribute external forces to the overall frame. Stress concentrates in local weak areas, ultimately leading to structural failure.

[0004] In view of this, we propose an enhanced hollow composite panel. Utility Model Content

[0005] The purpose of this utility model is to provide an enhanced hollow composite panel, which solves the problems of existing composite panels being unable to balance lightweight and high load-bearing capacity in enhanced applications, and the high self-weight of traditional solid panels with insufficient support stiffness, weak buckling resistance, and easy local instability under external forces.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An enhanced hollow composite panel, comprising:

[0008] The hollow frame includes a front mesh surface, a double-helix support frame, and a rear mesh surface. The front and rear mesh surfaces are connected by the double-helix support frame, which is composed of two connected annular spiral strips. A curable material is poured between the front and rear mesh surfaces. The hollow frame is woven from inorganic fibers in one piece.

[0009] A bolt assembly, comprising: a bolt head and a connecting ring, wherein the bolt head is provided with a connecting ring;

[0010] A reinforcing fiber mesh fabric layer is attached to both sides of the hollow skeleton;

[0011] An interface modification layer is coated on the outer surface of the reinforcing fiber mesh layer to improve interlayer interface compatibility.

[0012] Preferably, the two annular spiral strips of the double spiral support frame have opposite spiral directions, and their spiral axes are parallel to each other or intersecting at a predetermined angle.

[0013] Preferably, the curable material is at least one of lightweight concrete, epoxy resin-based composite material, or foamed polyurethane, and the reinforcing fiber mesh layer is bonded to the front and rear mesh surfaces by an adhesive.

[0014] Preferably, the end face of the bolt head is provided with internal thread, and the two ends of the double helix support frame are fixedly connected to the grid nodes of the front and rear mesh surfaces, respectively.

[0015] Preferably, the two annular spiral strips of the double helix support frame are partially overlapped in the axial direction.

[0016] Preferably, the interface modification layer has a clearance hole at the position of the corresponding bolt, and the diameter of the clearance hole is larger than the diameter of the bolt head.

[0017] Preferably, it further includes: a functional finishing layer, which is disposed on the surface of the interface modification layer.

[0018] Preferably, the surface of the functional finishing layer is provided with a protective layer, which covers decorative patterns or anti-slip textures.

[0019] Preferably, the bolt further includes: a pre-embedded ball mesh body, which is disposed on the connecting ring, and the pre-embedded ball mesh body is a multi-directional woven mesh ball structure.

[0020] By employing the above technical solution, this utility model provides an enhanced hollow composite panel. It possesses at least the following beneficial effects:

[0021] 1. This utility model sets up a hollow skeleton, and the front mesh surface, rear mesh surface and double helix support frame are combined to form a lightweight support frame. The internal hollow cavity provides a space for curable materials. The double helix structure can disperse external forces and improve the overall buckling resistance. After the curable material is poured, a "skeleton-core material" composite structure is formed, which takes into account the structural strength and the functional requirements of heat preservation and sound insulation.

[0022] 2. This utility model, by setting bolt components, allows the pre-embedded ball mesh to form a mechanical interlock with the curable material through a multi-directional mesh structure. Combined with the connecting ring and bolt head, it enables rapid connection of external components, avoiding the stress concentration problem caused by traditional bolts directly penetrating the core material. The integrated "pre-embedded-curing" anchoring method simplifies the installation process and improves construction efficiency. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0024] Figure 1 This is a schematic diagram of the hollow frame of this utility model;

[0025] Figure 2 This is a schematic diagram of the hollow skeleton part of this utility model;

[0026] Figure 3 This is a schematic diagram of the double helix support frame in this utility model;

[0027] Figure 4 This is a schematic diagram of the bolt component in this utility model;

[0028] Figure 5 This is a schematic diagram of the layered structure of this utility model.

[0029] In the diagram: 1. Hollow frame; 11. Front mesh; 12. Double helix support frame; 13. Rear mesh; 2. Bolts; 21. Bolt heads; 22. Connecting rings; 23. Embedded ball mesh; 3. Reinforcing fiber mesh layer; 4. Interface modification layer; 5. Functional finishing layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1 - Figure 5As shown, this utility model provides a technical solution: an enhanced hollow composite board, comprising: a hollow frame 1, the hollow frame 1 including a front mesh surface 11, a double helix support frame 12, and a rear mesh surface 13, the front mesh surface 11 and the rear mesh surface 13 being connected by the double helix support frame 12, the double helix support frame 12 being composed of two annular spiral strips connected together, the hollow frame 1 being woven from inorganic fibers in one piece; a curable material is poured between the front mesh surface 11 and the rear mesh surface 13, and through the combination of the front mesh surface 11, the rear mesh surface 13 and the double helix support frame 12, a lightweight support frame is formed, the internal hollow cavity providing space for the curable material, and the double helix structure can disperse external forces, improving the overall vertical tensile strength and bending strength; after pouring the curable material, a frame-core composite structure is formed, taking into account structural strength and the functional requirements of heat insulation, sound insulation and other functions; bolt components 2, the bolt components 2 including: bolt heads 21 and connecting rings 22, the bolt heads 21 being provided with connecting rings 22. Bolt 2 can enhance the fixed connection between the skeleton curing material and the hollow skeleton 1, preventing separation and detachment. In some preferred embodiments, in order to further enhance the fixed connection between the skeleton curing material and the hollow skeleton 1, bolt 2 also includes a pre-embedded ball mesh 23. The pre-embedded ball mesh (23) is set on the connecting ring 22. The pre-embedded ball mesh 23 is first placed in the hollow skeleton 1. When pouring curable material between the front mesh surface 11 and the rear mesh surface 13, the pre-embedded ball mesh 23 is placed between the front mesh surface 11 and the rear mesh surface 13. After the curable material is cured, an integrated anchoring structure can be formed. The pre-embedded ball mesh 23 forms a mechanical interlock with the curable material through a multi-directional mesh structure. It works with the connecting ring 22 and the bolt head 21 to achieve a rapid connection of external components, avoiding the stress concentration problem caused by the traditional bolt directly penetrating the core material. At the same time, the "pre-embedded-curing" integrated anchoring method can simplify the process. The installation process is streamlined to improve construction efficiency. The reinforcing fiber mesh layer 3, adhered to both sides of the hollow skeleton 1, inhibits shrinkage cracks after curing of the curable material, enhances the tensile strength of the composite board, and coordinates the deformation of the core material and outer structure through interfacial bonding, preventing interlayer delamination. The interface modification layer 4, coated on the outer surface of the reinforcing fiber mesh layer 3, improves interfacial compatibility, enhances the interfacial compatibility between the reinforcing fiber mesh and the functional finishing layer 5, reduces interfacial contact resistance, and improves the overall durability of the composite structure. The functional finishing layer 5, placed on the surface of the interface modification layer 4, forms a protective outer structure. As an outer protective structure, it can provide the composite board with fireproof, waterproof, impact-resistant, or decorative functions depending on the application scenario. Simultaneously, the integrated wrapping reduces seams, improving the overall integrity and aesthetics of the composite board.

[0032] The two annular spiral strips of the double helix support frame 12 have opposite spiral directions and their spiral axes are parallel to each other or intersecting at a preset angle. The reverse spiral strips can generate mutually restraining torques when subjected to force, offsetting the unidirectional force deviation of the single spiral structure and improving the torsional stiffness of the hollow frame 1. When the spiral axes are intersecting, a spatial grid support system can be formed to further optimize the stress distribution. The pre-embedded spherical mesh 23 is a multi-directional woven mesh spherical structure. The multi-directional woven mesh spherical structure can form a uniform interlocking force with the curable material in three-dimensional space, avoiding the stress concentration of traditional linear anchoring.

[0033] The curable material is at least one of lightweight concrete, epoxy resin-based composite material, or polyurethane foam. Lightweight concrete is suitable for load-bearing scenarios, epoxy resin-based composite material is suitable for high-strength and corrosion-resistant scenarios, and polyurethane foam is suitable for thermal insulation scenarios. The compatibility of multiple materials broadens the application range of the composite board. The reinforcing fiber mesh layer 3 is bonded to the front mesh surface 11 and the rear mesh surface 13 by adhesive, or fixedly connected to the hollow skeleton 1 by through-hole stitching. Adhesive bonding can achieve seamless connection and is suitable for curved or irregular structures; through-hole stitching can form mechanical locking and is suitable for high vibration or dynamic load scenarios. Both methods can avoid core material damage caused by traditional bolt fixing.

[0034] The bolt head 21 has an internal thread on its end face, which facilitates direct threaded connection with external connectors, such as lifting rings and splicing buckles, eliminating the need for additional adapters and shortening the installation process. The internal thread structure also allows for preload adjustment, preventing core material cracking caused by interference fit. The two ends of the double helix support frame 12 are fixedly connected to the grid nodes of the front mesh surface 11 and the rear mesh surface 13, respectively. The grid nodes are stress concentration areas. Fixing the ends of the double helix support frame 12 to these nodes forms a "node-support" collaborative force system, which improves the overall load-bearing capacity of the hollow frame 1 and reduces the amount of mesh deformation.

[0035] The interface modification layer 4 has a clearance hole at the position corresponding to the bolt 2. The diameter of the clearance hole is larger than the diameter of the bolt head 21. The clearance hole exposes the bolt head 21, avoiding electrochemical corrosion caused by direct contact between the bolt head 21 and the interface modification layer 4 material, such as the chemical reaction between the metal bolt and the organic modifier. At the same time, the clearance hole diameter is larger than the bolt head 21 diameter, providing a buffer space for the thermal expansion and contraction of the composite board under temperature changes, and preventing interface cracking.

[0036] The surface of the functional finishing layer 5 is provided with a protective layer, which covers decorative patterns or anti-slip textures. When covering decorative patterns, it can prevent the patterns from wearing off or fading, thus extending their aesthetic lifespan. Optional protective layers are transparent, such as heat-insulating transparent coatings or transparent protective coatings.

[0037] The two annular spiral strips of the double helix support frame 12 are partially overlapped in the axial direction. The overlapping area forms a "double helix-double density" support structure, which can form a gradient stiffness distribution in the thickness direction of the composite plate to meet the strengthening requirements of local high stress areas. Compared with the non-overlapping structure, the overlapping arrangement can improve the support stiffness.

[0038] Before using this reinforced hollow composite panel, the following preparations should be made: Confirm that the main structure of the hollow composite panel is intact, including the hollow frame 1, bolts 2, reinforcing fiber mesh layer 3, interface modification layer 4, and functional decorative layer 5, without damage. Prepare curable materials, mixing equipment, positioning clamps, hoisting tools, and sealing strips. Ensure the site is level and the ground bearing capacity meets the requirements for stacking and installing the composite panels. When working at height, erect temporary support scaffolding or a hoisting platform. Control the ambient temperature within a suitable range to avoid extreme temperatures affecting material performance.

[0039] Hollow Frame 1 Assembly and Bolt Component 2 Pre-embedding: According to the design spacing, the pre-embedded ball mesh 23 is placed in the hollow cavity of the hollow frame 1, ensuring that the axis of the bolt Component 2 is perpendicular to the thickness direction of the composite board. The position of the pre-embedded ball mesh 23 is adjusted so that its multi-directional woven structure is completely between the front mesh surface 11 and the rear mesh surface 13, avoiding interference with the double helix support frame 12. The curable material is mixed according to the material ratio and then poured into the hollow cavity of the hollow frame 1. During the pouring process, it is necessary to vibrate to remove air bubbles and ensure that the material is fully filled, especially wrapping the mesh structure and surface texture of the pre-embedded ball mesh 23 to form a mechanical interlocking anchor. Static curing is allowed, and the curing time is controlled according to the material type. External impact is avoided during the curing period. After curing, the bonding strength between the pre-embedded ball mesh 23 and the curable material is checked to ensure that there is no loosening or peeling. Outer Layer Structure Composite and Surface Treatment: The reinforcing fiber mesh layer 3 is respectively attached to the front mesh of the hollow frame 1. The outer side of face 11 and the outer side of back mesh 13 can be fixed by adhesive bonding or through-sewing. An interface modifier is evenly coated on the outer surface of the reinforcing fiber mesh layer 3, focusing on covering the avoidance holes at the bolt positions 2. Let it air dry naturally until the interface modification layer 4 is cured. The functional decorative layer 5 is then laminated onto the surface of the interface modification layer 4 and fixed by adhesive or mechanical clips to ensure that the transparent protective layer and decorative pattern or anti-slip texture are completely adhered. The edges of the functional decorative layers 5 of adjacent composite panels are spliced ​​using a tongue and groove structure, and the gaps are filled with sealing strips. Composite panel connection and overall fixation: the lifting ring is connected through the internal thread of the bolt head 21. The composite panel is transferred to the installation position using lifting tools, and the verticality and horizontality are adjusted. For multi-layer stacking or splicing scenarios, after the overall structure is stable, it is rigidly connected to the foundation or adjacent components through the integrated anchoring structure of the pre-embedded ball mesh 23. Sealant is applied to the joints and exposed parts of the bolt head 21 to prevent moisture penetration or electrochemical corrosion.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reinforced hollow composite panel, characterized in that: include: Hollow frame (1), the hollow frame (1) includes a front mesh surface (11), a double helix support frame (12), and a rear mesh surface (13). The front mesh surface (11) and the rear mesh surface (13) are connected by the double helix support frame (12). The double helix support frame (12) is composed of two annular spiral strips connected together. A curable material is poured between the front mesh surface (11) and the rear mesh surface (13). The hollow frame (1) is woven from inorganic fibers in one piece. Bolt component (2), the bolt component (2) includes: bolt head (21) and connecting ring (22), the connecting ring (22) is provided on the bolt head (21); A reinforcing fiber mesh fabric layer (3) is attached to both sides of the hollow skeleton (1); An interface modification layer (4) is coated on the outer surface of the reinforcing fiber mesh layer (3) to improve interlayer interface compatibility.

2. The reinforced hollow composite panel according to claim 1, characterized in that: The two annular spiral strips of the double spiral support frame (12) have opposite spiral directions, and their spiral axes are parallel to each other or intersecting at a preset angle.

3. The reinforced hollow composite panel according to claim 1, characterized in that: The end face of the bolt head (21) is provided with internal thread, and the two ends of the double helix support frame (12) are fixedly connected to the grid nodes of the front mesh surface (11) and the rear mesh surface (13), respectively.

4. The reinforced hollow composite panel according to claim 3, characterized in that: The two annular spiral strips of the double helix support frame (12) are partially overlapped in the axial direction.

5. The reinforced hollow composite panel according to claim 1, characterized in that: The interface modification layer (4) has a clearance hole at the position corresponding to the bolt (2), and the diameter of the clearance hole is larger than the diameter of the bolt head (21).

6. A reinforced hollow composite panel according to claim 1 or 5, characterized in that: Also includes: A functional finishing layer (5) is disposed on the surface of the interface modification layer (4).

7. The reinforced hollow composite panel according to claim 6, characterized in that: The surface of the functional finishing layer (5) is provided with a protective layer, which covers decorative patterns or anti-slip textures.

8. The reinforced hollow composite panel according to claim 1, characterized in that: The bolt (2) further includes: a pre-embedded ball mesh body (23), which is disposed on the connecting ring (22) and is a multi-directional woven mesh ball structure.

Images