A composite board for a light steel prefabricated building and a building manufacturing method

Abstract

The present application relates to a composite board for a light steel prefabricated building and a building manufacturing method, which are applied in the technical field of light steel buildings. It includes a composite board for a light steel prefabricated building, comprising: a light steel structure frame; a reinforcing mesh, wrapped and fixed on at least one side surface of the light steel structure frame; two decorative layers, fixed on two opposite side surfaces of the light steel structure frame, and the reinforcing mesh is arranged between the light steel structure frame and the decorative layers; a filler, filled in the enclosed area formed by the two decorative layers and the light steel structure frame. The present application has the effect of improving the stability and stiffness of the overall structure.

Description

Technical Field

[0001] The present application relates to the technical field of light steel buildings, and in particular to a composite panel for light steel assembled buildings and a building manufacturing method. Background Art

[0002] At present, light steel structure buildings are one of the important forms of prefabricated buildings. The basic material of light steel keels is galvanized or galvanized steel strips. Light steel keels are rolled into cold-bent thin-walled steel sections, and are usually connected by self-tapping screws, rivets and other fasteners to form components. Since the connection is a point connection and stress concentration, the keel and fasteners are subject to great shear force, which is not only easy to damage, but also has poor stability and low rigidity of the entire component.

[0003] In the related technology, the prefabricated building of light steel structure includes a keel frame and a structural plate outside the keel frame. The structural plate and the keel are connected with self-tapping screws. The structural plate outside the keel frame can serve as a pouring template. After the building frame is assembled at the construction site, cement mortar is injected into the inside of the structural plate. After the cement mortar solidifies, the construction of the prefabricated building is completed.

[0004] With respect to the above-mentioned related technologies, the inventors found that the connection between the structural plate and the keel frame is still a point connection, which leads to stress concentration. As a result, the stability and rigidity of the overall structure formed by the structural plate and the keel frame are poor. When subjected to stress, the connection is easily damaged, which affects the quality of the building construction. Therefore, there is room for improvement. Summary of the invention

[0005] In order to improve the stability and rigidity of the overall structure, the present application provides a composite panel for a light steel prefabricated building and a building manufacturing method.

[0006] In the first aspect, the present application provides a composite panel for light steel assembled buildings, which adopts the following technical solution:

[0007] A composite panel for light steel assembled buildings, comprising:

[0008] Lightweight steel structural frame;

[0009] A reinforcing net is wrapped and fixed to at least one side of the light steel structure frame;

[0010] Two decorative layers are fixed to two opposite sides of the light steel structure frame, and the reinforcing mesh is arranged between the light steel structure frame and the decorative layers;

[0011] Filling material is filled in the enclosed area between the two decorative layers and the light steel structure frame.

[0012] By adopting the above technical solution, the strengthening net covers the entire surface of the light steel structure frame, that is, a continuous whole is formed on the surface of the light steel structure frame. Then, a filler is filled in the space enclosed by the two decorative layers. The filler wraps the light steel structure frame and the strengthening net. After the filler is cured, it plays a role of bonding, filling, fixing, supporting, protecting and strengthening the light steel structure frame, changing the point fixation between joints into surface fixation and volume fixation, reducing stress concentration, bonding the decorative layers on the two surfaces to the light steel structure frame as a whole, forming a continuous, seamless and closed structural protection layer for the light steel structure frame, avoiding the generation of cracks, and thus improving the overall stability and stiffness of the composite board for building.

[0013] Optionally, there is a gap between the decorative layer and the strengthening net.

[0014] By adopting the above technical solution, a gap is formed between the adopted decorative layer and the strengthening net, which can facilitate the filler to completely wrap the steel net and be completely bonded to the decorative layer, improving the strength of the overall composite board.

[0015] Optionally, a protective member that only allows water vapor to pass through is connected between the decorative layer and the light steel structure frame.

[0016] By adopting the above technical solution, the protective member can not only prevent the filler from overflowing from the joint, but also promote the condensation and curing of the filler by the gradual evaporation of water and keep the water in the filler within a reasonable range, further improving the mechanical properties and anti-cracking properties of the filler.

[0017] Optionally, the light steel structure frame:

[0018] Vertical keels;

[0019] Horizontal keels, perpendicular and fixed to the vertical keels, and the vertical keels and the horizontal keels enclose a filling space;

[0020] Grouting holes, penetratingly opened in the horizontal keels or vertical keels.

[0021] By adopting the above technical solution, the filler can be filled into the filling space of the light steel structure frame through the reserved grouting holes, facilitating the injection of the filler.

[0022] Optionally, a plurality of studs are fixed on the adjacent sides of the two decorative layers;

[0023] A plurality of nuts are rotatably arranged on both sides of the light steel structure frame, and the nuts are arranged corresponding to the studs;

[0024] Stay bars that can move towards the adjacent direction are arranged on both sides inside the light steel structure frame;

[0025] A cable is wound around each of the said sleeve nuts, with one end fixed to the sleeve nut and the other end fixed to the pulling rod on the same side. When the two pulling rods move towards the closer side, they can drive each sleeve nut to rotate through the cable and connect with the stud.

[0026] By adopting the above technical solution, when installing the decorative layer, cover the decorative layer on both sides of the light steel structure frame, and make the stud opposite to the corresponding sleeve nut. Then, press the decorative layer against the light steel structure frame. At the same time, move the pulling rods on both sides of the light steel structure frame towards the closer side. Thus, through multiple cables, multiple sleeve nuts on both sides of the light steel structure frame can be driven to rotate synchronously, enabling the stud to be threadedly connected to the corresponding sleeve nut, completing the threaded connection between the decorative layer and the light steel framework. On the one hand, it realizes the threaded connection of multiple studs simultaneously, eliminating the need for construction workers to tighten the screws one by one, which is beneficial to improving the assembly efficiency, shortening the construction period, and saving manpower and material resources. On the other hand, the studs are not exposed, improving the appearance of the decorative surface.

[0027] Optionally, a sliding groove is provided at the position of the light steel structure frame corresponding to the pulling rod along the moving direction of the pulling rod, and one end of the pulling rod extends into the sliding groove.

[0028] By adopting the above technical solution, the sliding groove adopted can, on the one hand, facilitate the operation of sliding the two pulling rods, and on the other hand, after the sleeve nut is threadedly connected to the stud through the two pulling rods, the sliding groove can be used as a grouting hole for pouring the filler.

[0029] Optionally, arc-shaped openings are formed on the opposite sides of the pulling rods on both sides of the light steel structure frame;

[0030] As the two pulling rods abut and merge at the arc-shaped openings, the stud and the sleeve nut can complete the connection.

[0031] By adopting the above technical solution, after merging the pulling rods on both sides of the light steel framework and completing the pouring of the filler, a wire-passing space will be formed between the two arc-shaped openings for various cables to pass through.

[0032] Optionally, a water-permeable member is provided between the splicing surfaces of the two opposite pulling rods.

[0033] By adopting the above technical solution, the water-permeable member enables the water vapor and air inside the composite board to be discharged through the water-permeable member. It can not only prevent the filler from overflowing from the merging pipe but also promote the condensation and curing of the filler by the gradual evaporation of water and keep the water content in the filler within a reasonable range, further improving the mechanical properties and anti-cracking properties of the filler, which is beneficial to further improving the overall performance and durability of the prefabricated building of the light steel structure.

[0034] Secondly, a method for manufacturing a light steel prefabricated building provided by the present application adopts the following scheme;

[0035] A manufacturing method for a light steel prefabricated building, comprising the following steps:

[0036] Place the light steel structure frame on a pre-set foundation to install and build the main structure, and reserve grouting holes in the light steel structure frame;

[0037] Fix a reinforcement mesh on at least one surface of the light steel structure frame, so that the reinforcement mesh forms a continuous whole on the surface of the light steel structure frame;

[0038] Install decorative layers on two surfaces of the light steel structure frame respectively, so that the reinforcement mesh is located between the decorative layer and the light steel structure frame;

[0039] Pour the prepared and mixed filling material into the space enclosed by the decorative layer and the light steel structure frame through the grouting holes;

[0040] Install switches, sockets, etc. of the water and electricity pipelines, install doors and windows, and complete the prefabricated building of the light steel structure.

[0041] By adopting the above technical solution, the reinforcement mesh covers the entire surface of the light steel structure frame, that is, forms a continuous whole on the surface of the light steel structure frame, and then uses the filling material to fill the space enclosed by the two decorative layers. The filling material wraps the light steel structure frame and the reinforcement mesh. After the filling material is cured, it plays a role of bonding, filling, fixing, supporting, protecting and strengthening the light steel structure frame, so that the light steel structure frame forms a continuous, seamless and closed structural protection layer, avoiding the generation of cracks, thereby improving the overall stability and stiffness of the light steel building.

[0042] Optionally, the installation of the decorative layer includes the following steps:

[0043] 1) Rotate and set a plurality of screw sleeves on two surfaces of the light steel structure frame, fix and wind cables on the plurality of screw sleeves, set pull rods that can move relatively on both sides inside the light steel structure frame, and fix the movable ends of the cables on the same side to the pull rods on the same side;

[0044] 2) Fix studs on the adjacent side of the decorative layer, and the studs are arranged corresponding to the screw sleeves;

[0045] 3) Cover the decorative layer on two surfaces of the light steel structure frame, and make the studs and the corresponding screw sleeves face each other;

[0046] 4) Pull the pull rods on both sides of the light steel structure frame to move towards each other until they abut against each other, drive the plurality of screw sleeves on the same side to rotate through the cables on the same side, and thread the studs and the screw sleeves, completing the fixation of the decorative layer and the light steel structure frame.

[0047] By adopting the above technical solution, the decorative layer is covered on the outer side of the light steel skeleton, and the stud is made to face the corresponding screw sleeve. Then, the decorative layer is pressed against the light steel skeleton. At the same time, the holding rods on both sides of the light steel structure frame are slid, so that the stud is threadedly connected to the corresponding screw sleeve, completing the threaded connection between the decorative layer and the light steel skeleton. There is no need for construction workers to tighten the screws one by one, which is beneficial to improving the assembly efficiency, shortening the construction period, and saving manpower and material resources.

[0048] In summary, the present application includes at least one of the following beneficial technical effects:

[0049] 1. Both the cement mortar and the thermal insulation slurry have low costs, good construction performance, heat insulation and sound insulation performance, which is beneficial to ensuring the mechanical strength, heat insulation and sound insulation performance of the building. The filler bonds the light steel skeleton and the decorative layer, changing the point fixation between the joints to surface fixation and volume fixation, reducing stress concentration, and significantly improving the mechanical strength of the joints and the entire light steel structure frame, enhancing the stability and stiffness of the overall structure;

[0050] 2. The reinforcing mesh covers the entire surface of the light steel structure frame, that is, a continuous whole is formed on the surface of the light steel structure frame. Then, the filler is filled in the space enclosed by the two decorative layers. The filler wraps the light steel structure frame and the reinforcing mesh, bonding the decorative layers on the two surfaces to the light steel structure frame as a whole, forming a continuous, seamless and closed structural protection layer for the light steel structure frame, avoiding the generation of cracks, and thus improving the overall stability and stiffness of the composite board used in the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is an exploded view of the composite board structure in Embodiment 1 of the composite board for a light steel prefabricated building of the present application.

[0052] Figure 2 is a cross-sectional view of the composite board structure in Embodiment 1 of the composite board for a light steel prefabricated building of the present application.

[0053] Figure 3 is a schematic view of the composite board structure in Embodiment 3 of the composite board for a light steel prefabricated building of the present application.

[0054] Figure 4 is Figure 3 an enlarged view of part A in

[0055] Figure 5 is a schematic view of the composite board after the screw sleeve and the stud are connected in Embodiment 3 of the composite board for a light steel prefabricated building of the present application.

[0056] Figure 6 is Figure 5 an enlarged view of part B in

[0057] Description of reference numerals: 1, vertical keel; 2, horizontal keel; 3, reinforcement mesh; 4, filler; 5, decorative layer; 51, stud; 6, light steel structure frame; 61, screw sleeve; 62, cable; 63, wire loop; 64, tension rod; 65, chute; 66, water seepage part. Detailed implementation manners

[0058] The following further elaborates on this application in conjunction with Figures 1-6 the accompanying drawings.

[0059] The first aspect of the embodiment of this application provides a composite board for a light steel prefabricated building.

[0060] Embodiment 1:

[0061] Referring to Figure 1 and Figure 2 , a composite board for a light steel prefabricated building is mainly constructed by using a light steel structure composite board. The light steel structure composite board includes a vertical keel 1, a horizontal keel 2, a reinforcement mesh 3, a filler 4, and a decorative layer 5.

[0062] Referring to Figure 1 and Figure 2 , both the vertical keel 1 and the horizontal keel 2 are U-shaped channel steel structures in cross-section. The ends of the two horizontal keels 2 and the two vertical keels 1 are perpendicularly fixed to each other, thus forming a rectangular sheet-like light steel structure frame 6. The fixing method of the horizontal keel 2 and the vertical keel 1 can use fasteners such as self-tapping screws or anchor bolts for connection at the factory or on-site. To further improve the strength of the light steel structure frame 6, additional horizontal keels 2 and vertical keels 1 can also be added within the area enclosed by the light steel structure frame, thereby enhancing the strength of the light steel structure frame 6. In addition, grouting holes can be pre-set on the horizontal keel 2 or the vertical keel to facilitate the filling of the subsequent filler 4.

[0063] Referring to Figure 1 and Figure 2 , in this way, on the basis of the existing foundation that has been laid at the construction site, the light steel structure frame 6 can be installed and erected as the main supporting part of the prefabricated building by using the existing technology, and various pipelines can be installed within the light steel structure frame 6.

[0064] Referring to Figure 1 and Figure 2 , the reinforcement mesh 3 is connected to one surface or two opposite surfaces of the light steel structure frame 6, so that the steel mesh covers the entire surface of the light steel structure frame 6, that is, a continuous whole is formed on the surface of the light steel structure frame 6; to increase the strength of the light steel structure frame 6, and after the filler 4 is filled within the light steel structure frame 6 subsequently, the probability of the filler 4 cracking can be reduced. The reinforcement mesh 3 can use a steel mesh or a fiberglass mesh, and among them, the steel mesh can use high-strength metal mesh structures such as expanded metal, wire mesh, and steel bar mesh.

[0065] Referring to Figure 1 and Figure 2 , the decorative layer 5 is respectively installed on two surfaces of the light steel structure frame 6 through installation fasteners such as self-tapping screws, and the reinforcing mesh 3 is located between the light steel structure frame 6 and the decorative layer 5. To facilitate the subsequent filling of the filler 4, a gap of 3-6 mm can be left between the reinforcing mesh 3 and the decorative layer 5, so that the subsequent filler 4 can completely wrap the reinforcing mesh 3 and be in full contact with the decorative layer 5, maximizing the enhancement and anti-cracking functions of the reinforcing mesh 3 and the bonding effect of the filler 4.

[0066] Referring to Figure 1 and Figure 2 , the decorative layer 5 can use a board with a decorative surface layer or a board without a decorative surface layer, and then make a decorative surface layer after installation. For example, for the light steel structure frame 6 on the exterior wall part, its outer surface can use an integrated thermal insulation and decoration board (such as a ceramic integrated thermal insulation board, etc.), or a structural board (such as a cement fiber board, etc.) and then apply an exterior wall coating (such as real stone paint, etc.). The inner surface can use an interior decorative wall board (such as a bamboo and wood fiber board, etc.). A protective part that allows water vapor to pass through but not the slurry is pasted at the joint of the decorative layer 5 to prevent slurry leakage during the pouring of the filler 4, but can promote the gradual evaporation of the water in the filler 4.

[0067] Referring to Figure 2 , the filler 4 can use polymer foam cement mortar, polystyrene particle thermal insulation mortar, perlite thermal insulation mortar, etc. It not only has a light weight, high mechanical strength, good thermal insulation and sound insulation performance, but also has a low production cost, easy adjustment of composition and performance, convenient production and construction, and high fire resistance.

[0068] Referring to Figure 2 , the filler 4 can be poured at one time after the installation of the decorative layer 5 is completed, or can be poured in batches during the installation process of the decorative layer 5. For example, for the interior wall, the decorative layer 5 can be installed from the bottom while pouring the filler 4. For the floor and roof slab parts, the decorative layer 5 on the lower surface of the light steel structure frame 6 can be installed first, then the filler 4 can be poured, and finally the decorative layer 5 on the upper surface of the light steel structure frame 6 can be installed. Then, the joints of the decorative layer 5 are treated, such as applying a weather-resistant sealant at the joints, and finally, switches, sockets, etc. of the water and electricity pipelines are installed, doors and windows are installed, and the protective film on the decorative layer 5 is torn off, and a prefabricated building with a finely decorated light steel structure is obtained.

[0069] Example 2:

[0070] A composite board for a light steel prefabricated building is basically the same as that in Example 1, except that

[0071] There are protective parts that are permeable to water (vapor) and air but impermeable to the filling slurry between the decorative layer 5 and the light steel structure frame 6, and at the joints of adjacent decorative layers 5 after splicing multiple composite boards. The protective parts can be selected from non-woven fabrics, fiberglass cloths, breathable foam strip boards, etc. The protective parts can not only prevent the filling material from overflowing from the joints, but also promote the condensation and solidification of the filling material by the gradual evaporation of moisture and keep the moisture in the filling material within a reasonable range, further improving the mechanical properties and anti-cracking properties of the filling material.

[0072] The inner surface of the decorative layer 5 can also be coated with a waterproof coating. The waterproof coating can not only prevent the decorative layer 5 from absorbing water and affecting its own performance and the performance of the filling material 4, but also act as an interface agent to make the bonding between the filling material 4 and the decorative layer 5 more firm and reliable.

[0073] The waterproof coating can be sprayed before or after the installation of the decorative layer 5, but it is preferably sprayed after the installation of the decorative layer 5 and before the pouring of the filling material 4. The advantage is that through spraying, the waterproof coating can be sprayed on the light steel structure frame 6, which can not only protect the light steel structure frame 6, prevent the oxidation and corrosion of the cross-section of the light steel structure frame 6, but also act as an interface agent to make the bonding between the filling material 4 and the light steel structure frame 6 more firm and reliable, have a better strengthening and protective effect on the light steel structure frame 6, further improve the overall performance of the prefabricated building of the light steel structure and extend the service life.

[0074] Example 3:

[0075] Refer to Figure 3 and Figure 4 In this embodiment, the difference from Embodiment 1 is that a plurality of studs 51 are fixed on one surface of the decorative layer 5 facing the light steel structure frame 6, and sleeves 61 are rotatably arranged at the positions of the studs 51 on the light steel structure frame 6 corresponding to the decorative layer 5. Each sleeve 61 corresponds to each stud 51. The sleeve 61 is used for the threaded connection of the stud 51. A cable 62 is wound around the outer peripheral surface of the sleeve 61. One end of the cable 62 is fixed to the sleeve 61, and a wire ring 63 is integrally formed on the peripheral wall of the sleeve 61. The other end of the cable 62 passes through the wire ring 63. By pulling the cable 62, the cable 62 can extend through the wire ring 63, thereby driving the sleeve 61 to rotate.

[0076] Refer to Figure 3 and Figure 5 In this embodiment, tension rods 64 are arranged on both sides of the light steel structure frame 6 corresponding to the adjacent sides of the two decorative layers 5. Each tension rod 64 corresponds to each row of sleeves 61, and the tension rods 64 on both sides of the light steel structure frame 6 are arranged oppositely. A chute 65 for the two tension rods 64 on both sides to move towards the adjacent direction is formed between the tension rods 64 on both sides of the light steel frame, and this chute 65 can be used as the pouring port for the filling material 4.

[0077] Refer toFigure 3 and Figure 5 One end of each cable 62 on the same row of bushings 61 passes through the wire loop 63 and is fixed to the pull rod 64. When the pull rods 64 of the light steel structure frame 6 move towards the similar direction, they can drive each cable 62 to stretch, thereby driving each bushing 61 to rotate synchronously.

[0078] Refer to Figure 3 and Figure 5 When installing the decorative layer 5, face the decorative layer 5 towards the horizontal keel 2 and align the stud 51 with the corresponding bushing 61. Then apply pressure to the decorative layer 5 so that the end of the stud 51 abuts against the screw hole of the bushing 61. At the same time, pull the pull rods 64 on both sides of the light steel structure frame to slide towards the middle of the light steel structure frame. Each pull rod 64 drives each bushing 61 to rotate through the cable 62, so that each stud 51 is screwed into the screw hole of the bushing 61, completing the threaded connection between the decorative layer 5 and the horizontal keel 2. There is no need for construction workers to tighten the screws one by one, which is beneficial to improving the assembly efficiency, shortening the construction period, and saving manpower and material resources.

[0079] Refer to Figure 5 and Figure 6 , The pull rods 64 are all semi-circular tubular with a semi-circular cross-section, and the arc openings of the pull rods 64 on both sides of the light steel structure frame are arranged opposite to each other. When the pull rods 64 on both sides of the light steel structure frame are moved to the arc opening positions for splicing, the stud 51 and the bushing 61 will be fixed, and the opposite pull rods 64 can be spliced to form a combined pipe with a circular cross-section. The through hole in the middle of the combined pipe can be used as the threading hole for wires and other conductors. Corresponding rabbets are provided on the splicing end faces of the opposite two pull rods 64, so that the opposite two pull rods 64 are positioned by rabbet insertion. And the two pull rods 64 can be connected by fixing methods such as welding or screwing to complete the forming of the combined pipe.

[0080] Refer to Figure 6 , Water seepage parts 66 can also be connected at the splicing positions of the combined pipes. The water seepage parts 66 extend vertically to both ends of the combined pipe, and the bottom end of the combined pipe is communicated with the construction joint reserved in the building through a conduit. The water seepage parts 66 can be made of materials such as non-woven fabric, fiberglass cloth or breathable foam strip board that can permeate water vapor and air but block the filler 4. So that the internal water vapor can be discharged to the construction joint through the water seepage parts 66.

[0081] In addition, the cable 62 adopts a traction cable 62. The traction cable 62 is often used in explosion-proof walls and has good tensile performance. When splicing the pull rods 64, the pull rods 64 gradually pull out the traction cable 62. After pouring the filler 4, since the pull rods 64 are in a fixed state, the traction cable 62 forms a rotational limit for the bushing 61, reducing the possibility of the stud 51 loosening.

[0082] The present application also discloses a method for manufacturing a light steel assembled building, comprising the following steps:

[0083] Embodiment 1: A method for manufacturing a light steel assembled building:

[0084] Reference Figure 1 and Figure 2 , Step 1: First, according to the design plan, the processed vertical keel 1 and the horizontal keel 2 are connected in the factory or on the construction site using fasteners such as self-tapping screws or rivets to form a sheet-like light steel structure frame, and grouting holes are reserved on the vertical keel 1 or the horizontal keel 2;

[0085] Step 2: Using existing technology at the construction site to install and build the light steel structure frame 6 of the prefabricated building on the already laid foundation, and install various pipelines in the light steel structure frame 6;

[0086] Step 3: Install the reinforcing mesh 3 on one or both surfaces of the light steel structure frame 6. The reinforcing mesh 3 can be made of glass fiber mesh or steel mesh, so that the reinforcing mesh 3 forms a continuous whole on the surface of the light steel structure frame 6;

[0087] Step 4: Install the decorative layer 5 on the two surfaces of the light steel structure frame 6 respectively. The decorative layer 5 is fixed to the light steel structure frame 6 by self-tapping screws, etc. The steel mesh is located between the light steel structure frame 6 and the decorative layer 5, and a gap of 3-6 mm is reserved between the steel mesh and the decorative layer 5;

[0088] Step 5: pour the prepared and mixed filler 4 into the space enclosed by the decorative layer 5 and the light steel structure frame 6 through the reserved grouting holes. The filler 4 can be made of polymer foam cement mortar, polystyrene particle insulation mortar, perlite insulation mortar, etc.

[0089] Step six, treating the joint seams of the decorative layer 5, such as applying weather-resistant sealant on the joint seams;

[0090] Step seven, install switches and sockets for water and electricity pipes, install doors and windows, and tear off the protective film on the decorative layer 5 to obtain a finely decorated light steel structure prefabricated building.

[0091] Embodiment 2,

[0092] A method for manufacturing a light steel assembled building, which is different from the method in Example 1 in that the filler 4 is poured once after the decorative layer 5 is installed:

[0093] The filling material 4 can be poured in batches during the installation of the decorative layer 5. For example, the inner wall can be installed with the decorative layer 5 from the bottom while pouring the filling material 4. For the floor and roof panels, the decorative layer 5 on the lower surface of the light steel structure frame 6 can be installed first, the filling material 4 can be poured, and finally the decorative layer 5 on the upper surface of the light steel structure frame 6 can be installed.

[0094] Example 3. A manufacturing method for a light steel prefabricated building, comprising the following steps:

[0095] Refer to Figure 3 , Step 1: First, according to the design plan, connect the processed vertical keels 1 and horizontal keels 2 with fasteners such as self-tapping screws or rivets in the factory or at the construction site to form a sheet-like light steel structure frame 6;

[0096] Step 2: At the construction site, install and build the light steel structure frame 6 of the prefabricated building on the foundation that has been laid using the existing technology;

[0097] Step 3: Install a reinforcement mesh 3 on one or two surfaces of the light steel structure frame 6. The reinforcement mesh 3 can be selected from a fiberglass mesh or a steel mesh, so that the reinforcement mesh 3 forms a continuous whole on the surface of the light steel structure frame 6;

[0098] Refer to Figure 4 and Figure 5 , Step 4, Install decorative layers 5 on two surfaces of the light steel structure frame 6 respectively, and leave a gap of 3 - 6 mm between the steel mesh and the decorative layer 5. Installing the decorative layer includes the following steps:

[0099] 1) Rotate and arrange screw sleeves 61 on two surfaces of the light steel structure frame 6, fix a cable 62 wound around the screw sleeves 61 on the screw sleeves 61, and open a sliding chute 65 along the thickness direction on the side of the light steel structure frame 6 in the thickness direction; arrange semi-circular holding rods 64 at both ends of the chute 65, keep the arc openings of the holding rods 64 facing each other, and fix the movable end of the cable 62 on the side of the holding rod 64 away from the arc opening;

[0100] 2) Fix stud bolts 51 on the side close to the decorative layer 5, and the stud bolts 51 are arranged corresponding to the screw sleeves 61;

[0101] 3) Cover the decorative layer 5 on two surfaces of the light steel structure frame 6, and make the stud bolts 51 face the corresponding screw sleeves 61;

[0102] 4) Pull the holding rods 64 on both sides of the light steel structure frame 6 to move towards each other until they abut against each other to form a splicing pipe. At the same time, drive the screw sleeves 61 to rotate through the cable 62, so that the stud bolts 51 are threadedly connected with the screw sleeves 61 to complete the fixation of the decorative layer 5 and the light steel structure frame 6;

[0103] 5) Fix the two opposite holding rods 64 by welding or screwing, etc. to form a combined pipe. Step 5, Pour the prepared and mixed filling material 4 into the space surrounded by the decorative layer 5 and the light steel structure frame 6 through the chute. The filling material 4 can be polymer foam cement mortar, polystyrene particle thermal insulation mortar, perlite thermal insulation mortar, etc., and ensure that the space inside the combined pipe is not poured;

[0104] Step Six, process the joints of the decorative layer 5, such as applying weather-resistant sealant at the joints, etc.;

[0105] Step Seven, pass the wire circuit through the combined pipe, and install switches, sockets, etc. of the water and electricity pipelines, install doors and windows, and tear off the protective film on the decorative layer 5, then a prefabricated building with a fine decoration of light steel structure is obtained.

[0106] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A composite board for a light steel prefabricated building, characterized in that, it includes: A light steel structure frame (6); A reinforcing mesh (3), wrapped and fixed on at least one side surface of the light steel structure frame (6); Two decorative layers (5), fixed on two opposite side surfaces of the light steel structure frame, and the reinforcing mesh (3) is arranged between the light steel structure frame (6) and the decorative layer (5); A filler (4), filled in the enclosed area between the two decorative layers (5) and the light steel structure frame (6); A plurality of studs (51) are fixed on the adjacent sides of the two decorative layers (5); A plurality of screw sleeves (61) are rotatably arranged on both sides of the light steel structure frame (6), and the screw sleeves (61) are arranged corresponding to the studs (51); Two tension rods (64) capable of moving towards the adjacent direction are arranged on both sides inside the light steel structure frame (6); A cable (62) with one end fixed to the screw sleeve (61) and the other end fixed to the tension rod (64) on the same side is wound on each screw sleeve (61). When the two tension rods (64) move towards the adjacent side, the cable (62) can drive each screw sleeve (61) to rotate and connect with the stud (51); A chute (65) is formed in the light steel structure frame (6) at the position corresponding to the tension rod (64) along the moving direction of the tension rod (64). One end of the tension rod (64) extends into the chute (65), and the chute (65) serves as a pouring port for the filler (4); Arc openings are formed on the opposite sides of the tension rods (64) on both sides of the light steel structure frame (6); As the two tension rods (64) abut against each other and the arc openings are combined, the stud (51) and the screw sleeve (61) can be connected, and the opposite tension rods (64) are spliced to form a combined pipe with a circular cross-section. The through hole in the middle of the combined pipe is used for the wire to pass through. After pouring the filler (4), since the tension rod (64) is in a fixed state, the traction cable (62) forms a rotational limit for the screw sleeve (61).

2. The composite board for a light steel prefabricated building according to claim 1, characterized in that: A gap is left between the decorative layer (5) and the reinforcing mesh (3).

3. The composite board for a light steel prefabricated building according to claim 1, characterized in that: A protective member that only allows water vapor to pass through is connected between the decorative layer (5) and the light steel structure frame (6).

4. The composite board for a light steel prefabricated building according to claim 1, characterized in that: The light steel structure frame (6) includes: Vertical keels (1); Horizontal keels (2), perpendicular and fixed to the vertical keels (1), and the vertical keels (1) and the horizontal keels (2) enclose a filling space; Grouting holes are formed through the horizontal keels (2) or the vertical keels (1).

5. The composite board for a light steel prefabricated building according to claim 1, characterized in that: A water seepage member (66) is arranged between the splicing surfaces of the two opposite tension rods (64).

6. A manufacturing method of a light steel prefabricated building using the composite board for a light steel prefabricated building according to claim 1, characterized in that, it includes the following steps: Place the light steel structure frame (6) on the pre-set foundation to install and build the main structure, and reserve grouting holes on the light steel structure frame (6). Fix the reinforcement mesh (3) on at least one surface of the light steel structure frame (6) so that the reinforcement mesh (3) forms a continuous whole on the surface of the light steel structure frame (6). Install the decorative layers (5) on two surfaces of the light steel structure frame (6) respectively, so that the reinforcement mesh (3) is located between the decorative layer (5) and the light steel structure frame (6). Pour the prepared and mixed filling material (4) into the space enclosed by the decorative layer (5) and the light steel structure frame (6) through the grouting holes. Install the switches and sockets of the water and electricity pipelines, install the doors and windows, and complete the prefabricated building of the light steel structure.

7. According to the method for manufacturing a light steel prefabricated building described in claim 6,[[]]END]] it is characterized in that: The installation of the decorative layer (5) includes the following steps: 1) Rotate and arrange a plurality of screw sleeves (61) on two surfaces of the light steel structure frame (6), fix and wind the cable (62) on the plurality of screw sleeves (61), arrange pull rods (64) that can move relatively on both sides inside the light steel structure frame (6), and fix the movable ends of the cables (62) on the same side to the pull rods (64) on the same side. 2) Fix the stud (51) on the adjacent side of the decorative layer (5), and the stud (51) is arranged corresponding to the screw sleeve (61). 3) Cover the decorative layer (5) on two surfaces of the light steel structure frame (6), and make the stud (51) face the corresponding screw sleeve (61). 4) Pull the pull rods (64) on both sides of the light steel structure frame (6) to move towards each other until they abut against each other, drive a plurality of screw sleeves (61) on the same side to rotate through each cable (62), and thread the stud (51) and the screw sleeve (61) to complete the fixation of the decorative layer (5) and the light steel structure frame (6).

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