CN215802438U - Metal sandwich board - Google Patents

Abstract

The utility model discloses a metal sandwich panel, which belongs to the technical field of light steel structure buildings and comprises an upper metal panel and a lower metal panel which are bent according to the plate type of a prefabricated sandwich panel; the two corresponding ends of the upper metal panel and the lower metal panel are fixedly connected to form a complete sandwich board surface structure, one end of the surface structure is a tenon connecting node, and the other end of the surface structure is a tongue-and-groove connecting node; a filling cavity is also arranged between the upper layer metal panel and the lower layer metal panel, and a core material layer is filled in the center of the filling cavity; and biomass fiber reinforced gypsum serving as a hardening body porous structure is filled in a filling cavity defined by the tenon connecting node and the tongue-and-groove connecting node and the core material layer respectively. The utility model has the advantages of ensuring the strength and rigidity of the light steel enclosure system structure building, effectively blocking flame when fire hazard occurs, and protecting the sandwich board core material.

Description

Metal sandwich board

Technical Field

The utility model relates to the technical field of light steel structure buildings, in particular to a metal sandwich board.

Background

The light steel structure sandwich board consists of two layers of formed metal panels (or panels made of other materials) and a polymer heat-insulating inner core formed by directly foaming and curing the middle of the panels. The finished sandwich plates are light and convenient to install. The joint structure of sandwich board is composed of the first roof board with water-proof cover plate and its seam, the second wall board with self-tapping screw and its another board with male and female ribs, and the second board with hidden joint.

The construction of the connection node is very important in steel structure construction, and the damage of many steel structure constructions is the connection node damage. Sandwich panels used in construction today are often filled with rigid foam materials such as polyurethane/Polyisocyanurate (PIR), polystyrene/extruded board, phenolic resin, etc. at the joint points. The materials have good mechanical property and thermal insulation property, and become softer and more viscoelastic at high temperature; at low temperatures, it becomes more brittle, harder, and stronger. Plastic foam materials are all flammable, possibly due to raw materials. Although the fire-retardant property of the material can be improved by selecting proper raw materials, special foaming process and adding retarder or inorganic filling material, the chemical decomposition temperature and the combustion temperature of the plastic foam material are slightly influenced by the additive, and the additive is mainly used for delaying the combustion process. Therefore, it is necessary to provide a sandwich panel having similar properties but excellent fire-retardant properties against the drawbacks of the plastic foam.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the metal sandwich board which has the advantages of ensuring the strength and rigidity of a light steel enclosure system structure building, effectively blocking flame when fire hazard occurs and protecting the core material of the sandwich board.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a metal sandwich panel comprises an upper metal panel and a lower metal panel which are bent according to the plate shape of a prefabricated sandwich panel; the two corresponding ends of the upper metal panel and the lower metal panel are fixedly connected to form a complete sandwich board surface structure, one end of the surface structure is a tenon connecting node, and the other end of the surface structure is a tongue-and-groove connecting node; a filling cavity is also arranged between the upper layer metal panel and the lower layer metal panel, and a core material layer is filled in the center of the filling cavity; and biomass fiber reinforced gypsum serving as a hardening body porous structure is filled in a filling cavity defined by the tenon connecting node and the tongue-and-groove connecting node and the core material layer respectively.

In order to optimize the technical scheme, the specific measures adopted further comprise:

further, the core material layer adopts one or more of rock wool material, polyurethane material, glass silk cotton material, extruded sheet material and mineral wool material as the core material.

Furthermore, two metal sandwich plates with the same specification can be spliced and assembled through the tenon connecting node and the tongue-and-groove connecting node, so that the expansion of the metal sandwich plates is realized; the tongue-and-groove connection nodes are single tongue-and-groove connection nodes or double tongue-and-groove connection nodes; correspondingly, the tenon connecting node is a single tenon connecting node matched with the single tongue-and-groove connecting node or a double tenon connecting node matched with the double tongue-and-groove connecting node.

Furthermore, self-tapping screw fixing grooves are formed in the tongue-and-groove positions of the single tongue-and-groove connecting node and the double tongue-and-groove connecting node; after the two metal sandwich plates are spliced and assembled, the self-tapping screws are driven into the self-tapping screw fixing grooves, and the two metal sandwich plates are fixed on a wall beam or a purline.

Furthermore, the notch of the self-tapping screw fixing groove is a V-shaped notch or a rectangular notch, and the shape of the notch is determined according to the connection strength of the metal sandwich panel serving as a wall panel or a roof panel and the specification of the self-tapping screw.

Further, the biomass fiber reinforced gypsum is prepared by taking gypsum as a matrix and one of wood fiber, sisal fiber or bamboo fiber or a mixture of any two or three of the wood fiber, the sisal fiber and the bamboo fiber as a reinforcement, adding water, fully stirring, mixing and solidifying.

The utility model has the beneficial effects that:

1. the biomass fiber reinforced gypsum used in the utility model is used as a hardening body porous structure, has the advantages of strong heat preservation and insulation and sound absorption, and excellent fireproof performance, and when the biomass fiber reinforced gypsum is filled in the connecting nodes of the sandwich board, the crystal water in the sandwich board is evaporated to form a steam curtain after encountering fire, so that the fire spreading can be effectively prevented, and the fireproof effect is achieved.

2. According to the utility model, the biomass fiber is added as a reinforcement, so that the tensile bonding strength of the common gypsum can be effectively improved; the gypsum matrix added with the biomass fibers has obviously improved elastic modulus, static bending strength and bonding strength compared with common gypsum, and simultaneously has weakened brittleness, so that the joint strength of the sandwich board can be effectively enhanced.

3. The connecting joint has the form of single or multiple tongue-and-groove and tenon, and can be suitable for the connecting strength of various metal composite plates serving as roof boards or wall panels; meanwhile, the self-tapping screw fixing grooves are formed in the tongue-and-groove positions, and the metal sandwich plate can be stably fixed to the wall beam or the purline by matching with the self-tapping screws.

Drawings

FIG. 1 is a schematic view of the overall structure of a single metal sandwich panel of the present invention;

FIG. 2 is a schematic view of an assembly structure of two metal sandwich panels according to the present invention;

FIG. 3 is a schematic structural view of the assembly of two metal sandwich panels by a first double tongue-and-groove or tenon joint according to the present invention;

fig. 4 is a schematic structural view of the assembly of two metal sandwich panels by a second double tongue-and-groove or tenon joint according to the present invention.

The label names in the figure: the composite board comprises an upper metal panel 1, a lower metal panel 2, tenon connecting nodes 3, tongue-and-groove connecting nodes 4, biomass fiber reinforced gypsum 5 and a core material layer 11.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the utility model, and the relative relationship between the terms and the terms is not limited by the scope of the utility model.

The first embodiment:

referring to fig. 1-2, a metal sandwich panel of the present embodiment includes an upper metal panel 1 and a lower metal panel 2 bent according to a prefabricated sandwich panel; the corresponding two ends of the upper metal panel 1 and the lower metal panel 2 are fixedly connected to form a complete sandwich board surface structure, one end of the surface structure is a tenon connecting node 3, and the other end of the surface structure is a tongue-and-groove connecting node 4; a filling cavity is also arranged between the upper-layer metal panel 1 and the lower-layer metal panel 2, and a core material layer 11 is filled in the center of the filling cavity; the tenon joint 3 and the tongue-and-groove joint 4 are filled with biomass fiber reinforced gypsum 5 serving as a hardening body porous structure in a filling cavity enclosed by the core material layer 11.

In this embodiment, the core material layer 11 is made of rock wool, or may be made of one or more of polyurethane material, glass wool material, extruded board material, and mineral wool material, and is used in combination with the biomass fiber reinforced gypsum filling nodes at the joints of the present invention.

Referring to fig. 2-4, two metal sandwich boards with the same specification can be assembled by splicing the tenon joint 3 and the tongue-and-groove joint 4, so that the metal sandwich boards are expanded; the tongue-and-groove connection node 4 is a single tongue-and-groove connection node, as shown in fig. 2; or double tongue-and-groove connection nodes, as shown in fig. 3-4, both of which are suitable for the connection of metal surface composite plates with the thickness of 50 mm; correspondingly, the tenon joint 3 is a single tenon joint matched with a single tongue-and-groove joint or a double tenon joint matched with a double tongue-and-groove joint.

Wherein, the tongue-and-groove positions of the single and double tongue-and-groove connecting nodes are provided with self-tapping screw fixing grooves; after the two metal sandwich boards are spliced and assembled, the self-tapping screws are driven into the self-tapping screw fixing grooves, and the two metal sandwich boards are fixed on the wall beam or the purline, so that the connection of the two wall panels or the roof panels is correspondingly formed.

The notch of the self-tapping screw fixing groove is a V-shaped notch (as shown in figure 3) or a rectangular notch (as shown in figure 4), and the shape of the notch is determined according to the connection strength of the metal sandwich panel serving as a wall panel or a roof panel and the specification of the self-tapping screw.

In this embodiment, the biomass fiber reinforced gypsum 5 is formed by using gypsum as a matrix and one of wood fiber, sisal fiber and bamboo fiber or a mixture of any two or three of the wood fiber, the sisal fiber and the bamboo fiber as a reinforcement, adding water, fully stirring and mixing, and then solidifying.

The metal sandwich board which combines the biomass fibers and the gypsum powder as the filling material of the connecting nodes has excellent mechanical property, heat insulation and sound absorption capability and fireproof performance; the specific implementation steps can be divided into the following points:

step a: firstly, bending the existing upper metal panel 1 according to the plate shape of a prefabricated sandwich plate, filling a sandwich plate core material (the position of the filling material at the connecting node of the two ends of the sandwich plate is reserved at the moment), and then integrating and fixing the bent lower metal panel 2 and the two ends of the upper metal panel 1 into a whole metal sandwich plate (namely forming a complete sandwich plate surface structure);

step b: a user mixes the biomass fibers into the gypsum powder and can turn and stir the biomass fibers by using a tool so as to uniformly distribute the biomass fibers in the gypsum powder; it is noted that users should control the adding amount of the biomass fiber at 3%, and use wood fiber with particle size of 10-40um or sisal fiber and bamboo fiber with fiber length of 20 mm;

step c: adding water into gypsum powder mixed with biomass fibers, and fully stirring; the slurry stirring time is about 10min optimally;

step d: after slightly standing, filling the pasty biomass fiber gypsum into a space reserved at the connecting node of the board end of the sandwich board (namely a filling cavity enclosed by the tenon connecting node 3, the rabbet connecting node 4 and the core material layer 11) by using a filling device until the pasty gypsum overflows, and scraping the redundant pasty gypsum;

step e: standing, and after the pasty biomass fiber gypsum is completely solidified, using the sandwich board.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may be made by those skilled in the art without departing from the principle of the utility model.

Claims (6)

1. A metal sandwich panel is characterized by comprising an upper metal panel (1) and a lower metal panel (2) which are bent according to the plate shape of a prefabricated sandwich panel; the two corresponding ends of the upper metal panel (1) and the lower metal panel (2) are fixedly connected to form a complete sandwich board surface structure, one end of the surface structure is a tenon connecting node (3), and the other end of the surface structure is a tongue-and-groove connecting node (4); a filling cavity is also arranged between the upper layer metal panel (1) and the lower layer metal panel (2), and a core material layer (11) is filled in the center of the filling cavity; and biomass fiber reinforced gypsum (5) serving as a hardening body porous structure is filled in a filling cavity defined by the tenon connecting node (3) and the tongue-and-groove connecting node (4) and the core material layer (11).

2. A metal sandwich panel according to claim 1, wherein the core material layer (11) is made of one or more of rock wool material, polyurethane material, glass wool material, extruded board material and mineral wool material.

3. The metal sandwich panel according to claim 1, wherein two metal sandwich panels with the same specification can be spliced and assembled through the tenon joint (3) and the tongue-and-groove joint (4) so as to realize the expansion of the metal sandwich panel; the tongue-and-groove connecting nodes (4) are single tongue-and-groove connecting nodes or double tongue-and-groove connecting nodes; correspondingly, the tenon connecting node (3) is a single tenon connecting node matched with the single tongue-and-groove connecting node or a double tenon connecting node matched with the double tongue-and-groove connecting node.

4. The metal sandwich panel according to claim 3, wherein the tongue-and-groove positions of the single and double tongue-and-groove connection nodes are provided with self-tapping screw fixing grooves; after the two metal sandwich plates are spliced and assembled, the self-tapping screws are driven into the self-tapping screw fixing grooves, and the two metal sandwich plates are fixed on a wall beam or a purline.

5. The metal sandwich panel according to claim 4, wherein the notch of the self-tapping screw fixing groove is a V-shaped notch or a rectangular notch, and the shape of the notch is determined according to the connection strength of the metal sandwich panel as a wall panel or a roof panel and the specification of the self-tapping screw.

6. The metal sandwich panel according to any one of claims 3 to 5, wherein the biomass fiber reinforced gypsum (5) is formed by using gypsum as a matrix and one of wood fiber, sisal fiber or bamboo fiber or a mixture of any two or three of the wood fiber, the sisal fiber and the bamboo fiber as a reinforcement, adding water, fully stirring and mixing, and then solidifying.

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