Disclosure of Invention
In order to solve the problems, the invention provides a prefabricated composite heat-insulation external wall panel for a passive house, which has good bearing capacity on the premise of good heat insulation effect.
The technical scheme of the invention is as follows: a prefabricated composite heat-insulation external wall panel for a passive house comprises an external wall outer panel, an external wall inner panel and an internal filling heat-insulation material group positioned between the external wall outer panel and the external wall inner panel;
the inner filling heat insulation material group comprises xps plates which are respectively arranged on two opposite sides of an outer wall outer plate and an outer wall inner plate, and vacuum heat insulation plates which are bonded between the two layers of xps plates, wherein the vacuum heat insulation plates are arranged at intervals, and xps plates are respectively bonded on the outer wall outer plate and the outer wall inner plate;
a connecting piece group for penetrating the internally filled heat insulation material group is commonly fixed between the outer wall plate and the inner wall plate;
the inner side and the outer side of the outer wall inner plate are respectively provided with a layer of keel to form an inner side keel facing the indoor direction and an outer side keel connecting the outer wall outer plate direction, and each layer of keel comprises a plurality of vertical keels and transverse keels;
four sides of the outer wall plate are respectively connected with angle steel frames through bolts, a reinforcing mesh is arranged in an area enclosed by the four angle steel frames, and the stable connecting structure is fixedly arranged on the reinforcing mesh.
By adopting the technical scheme, the xps plates on two opposite sides of the outer wall outer plate and the outer wall inner plate and the vacuum heat-insulating plates adhered between the two layers of xps plates are respectively arranged, so that a good heat-insulating effect can be achieved, the vacuum heat-insulating plates are arranged at intervals, and the xps plates are respectively adhered to the outer wall outer plate and the outer wall inner plate, so that the temperature can be transmitted only through the vacuum heat-insulating plates, and the purpose of good heat-insulating performance is achieved; meanwhile, four edges of the outer wall plate are respectively connected with angle steel frames through bolts, a reinforcing mesh is arranged in an area enclosed by the angle steel frames, the stable connecting structure is fixedly arranged on the reinforcing mesh, and a connecting piece group penetrating through the internally filled heat-insulating material group is jointly fixed between the outer wall plate and the inner wall inner plate, so that the integral structural strength of the outer wall plate can be improved, and the outer wall plate has good bearing capacity.
Preferably, the following steps: the connecting piece comprises a glass fiber reinforced plastic pulling piece and a bridge cut-off connecting piece.
By adopting the technical scheme, the glass fiber reinforced plastic pulling piece is light in weight, high in strength and poor in heat conduction capability, and meets the requirements of good heat insulation performance and strong bearing capacity for the external wallboard.
Preferably, the following steps: the stable connection structure is in a triangular pyramid protruding shape distributed at intervals, and one tip of the stable connection structure in the triangular pyramid shape faces towards the outer plate of the outer wall and is arranged between the outer plate of the outer wall and the inner part of the outer wall.
Through adopting above-mentioned technical scheme, the protruding stable connection structure of form of triangular pyramid can be stable be connected with the bridge cut-off connecting piece, self stable in structure is favorable to the promotion of side fascia bulk strength and bearing capacity simultaneously.
Preferably, the following steps: the transverse keel is provided with a plurality of adapter pieces for connecting the transverse keel and the bridge cutoff connecting piece.
Through adopting above-mentioned technical scheme, the adaptor is used for being connected cross keel and bridge cut-off connecting piece to improve the bulk strength and the load-carrying capacity of side fascia.
Preferably, the following steps: the outer wall inner plate is a light steel keel cement pressurizing plate, and the outer wall outer plate is a reinforced concrete plate.
Preferably, the following steps: the distance between two adjacent vertical keels is 200-300 mm; the distance between two adjacent transverse keels is 300-500 mm.
Preferably, the following steps: the angle iron frame is a galvanized angle iron frame.
Preferably, the following steps: the diameter of the connecting bolt is 8-20 mm, and the specific gravity of the outer wall plate is 2.0-2.5t/m 3.
Preferably, the following steps: a plastering mortar is arranged between the vacuum heat insulation plate and the xps plate, and comprises the following components in parts by weight:
30-43.5% of cement, 49.5-64.4% of yellow sand, 3.96-4.95% of fly ash, 0.1-0.15% of wood fiber, 0.05-0.1% of PP fiber and 0.7-0.8% of wacker rubber powder, wherein the yellow sand is dried yellow sand, the fineness modulus of the yellow sand is 1.6-2.2, the mud content is less than 3%, the water content is less than 2%, and the water-cement ratio is 0.20-0.23.
By adopting the technical scheme, the raw materials are low in price and do not contain components harmful to the environment, so that the cost is reduced, and the environment is not damaged.
The invention has the following technical effects:
1. xps plates which are respectively arranged on two opposite sides of the outer wall outer plate and the outer wall inner plate and vacuum insulation plates which are bonded between the two layers of xps plates can play a good heat insulation effect, and since the vacuum insulation plates are arranged at intervals and xps plates are respectively bonded on the outer wall outer plate and the outer wall inner plate, the temperature can be transmitted only through the vacuum insulation plates, so that the purpose of good heat insulation performance is realized; meanwhile, four edges of the outer wall plate are respectively connected with angle steel frames through bolts, a reinforcing mesh is arranged in an area enclosed by the four angle steel frames, the stable connecting structure is fixedly arranged on the reinforcing mesh, and a connecting piece group penetrating through the internally filled heat insulation material group is jointly fixed between the outer wall plate and the inner wall inner plate, so that the integral structural strength of the outer wall plate can be improved, and the outer wall plate has good bearing capacity;
2. the bridge cut-off connecting piece is made of a steel structural part and a heat-resistant material, has simple structure and convenient connection, can meet the drawing effect of a light plate and the heat transfer bridge cut-off effect in a heat-insulating wall body, and can well ensure the quality of the wall body;
3. the stable connection structure of the triangular pyramid protrusion can be stably connected with the broken bridge connecting piece, and meanwhile, the stable structure of the stable connection structure is favorable for improving the overall strength and the bearing capacity of the external wall panel.
Example (b): a prefabricated composite heat-insulation external wall panel for a passive house is shown in figure 1 and comprises an external wall outer panel 1, an external wall inner panel 2, a bridge-cut-off connecting piece 6 fixedly arranged between the external wall outer panel 1 and the external wall inner panel 2, a glass fiber reinforced plastic bonding piece 10 fixedly arranged between the external wall outer panel 1 and the external wall inner panel 2, and an internal filling heat-insulation material group 3 arranged between the external wall outer panel 1 and the external wall inner panel 2. The inner filling heat insulation material group 3 comprises xps plates which are respectively arranged on two opposite sides of the outer wall outer plate 1 and the outer wall inner plate 2 and a vacuum heat insulation plate which is bonded between the two layers of xps plates. xps plates are respectively adhered to the outer wall panel 1 and the inner wall panel 2. The side walls of two adjacent vacuum insulation panels are mutually abutted, and the vacuum insulation panels are uniformly distributed on the xps board. xps a plastering mortar for bonding the two boards is arranged between the boards and the vacuum insulation board, and the plastering mortar comprises the following components in parts by mass: 31% of cement, 64% of yellow sand, 4.1% of fly ash, 0.1% of wood fiber, 0.1% of PP fiber, 0.7% of tile rubber powder, and the yellow sand is dried yellow sand, the fineness modulus of the yellow sand is 1.6-2.2, the mud content is less than 3%, the water content is less than 2%, and the water-cement ratio is 0.20-0.23.
The outer wall inner panel 2 adopts light gauge steel cement increased pressure board, and the inside and outside of outer wall inner panel 2 respectively has one deck fossil fragments, and every layer fossil fragments all include the fore-and-aft perpendicular fossil fragments 9 of a plurality of and horizontal cross keel 8, and the interval between the perpendicular fossil fragments 9 of a plurality of is 300mm, and the interval between the cross keel 8 of a plurality of is 500 mm.
The outer plate 1 of the outer wall is a reinforced concrete plate. The outer wall panel 1 comprises angle steel frames of steel bar structural members, connecting bolts, steel bar meshes 4 and stable connecting structures 5, four edges of the steel bar structural members of the outer wall panel 1 are angle steel frames respectively, the steel bar meshes 4 connected to the inner edges of the steel bars are arranged in the four angle steel frames as one layer, the four sides of the steel bar meshes 4 are fixed by the four angle steel frames, the angle steel frames are provided with a plurality of connecting bolts for fixing the outer wall panel 1, and the stable connecting structures 5 are fixed on the steel bar meshes 4. The angle steel frame is a galvanized angle steel frame, and the diameter of the connecting bolt is 8 mm. The weight of the exterior wall panel 1 is 2.0 t/m.
The bridge cutoff connecting piece 6 is made of bridge cutoff aluminum and is positioned between the outer wall outer plate 1 and the outer wall inner plate 2. The bridge-cut-off connecting piece 6 is connected by a nylon cable tie. The plurality of stable connection structures 5 have a plurality of layers, and each layer of stable connection structure 5 has the structure that: a plurality of short reinforcing steel bars facing the inner side of the reinforcing mesh 4 are welded on one or two transverse reinforcing steel bars on the reinforcing mesh 4 to form a plurality of triangles, an acute angle of each triangle faces the inner side of the reinforcing mesh 4, namely, the inner side of the outer wall inner plate 2, a connecting reinforcing steel bar is arranged on the inner side of the reinforcing mesh 4, the short reinforcing steel bars are welded on the connecting reinforcing steel bar, and each welding point on the connecting reinforcing steel bar is welded with two or four short reinforcing steel bars so as to be connected with the bridge-cut-off connecting piece 6; an adapter 7 is arranged between the cross keel 8 and the bridge-cut connector 6. The quantity of adaptor 7 is equivalent to the triangle-shaped quantity on the 4 horizontal reinforcing bars of above-mentioned reinforcing bar net piece, and adaptor 7 passes through bolted connection on 2 cross girders of outer wall inner panel 8, and adaptor 7 includes coupling part and fretwork part, and coupling part links to each other with cross girders 8, and the fretwork part is the remainder after above-mentioned adaptor 7 links to each other with above-mentioned cross girders 8, is the fretwork in the middle of it, and bridge cut-off connecting piece 6 penetrates the ligature through the nylon band and connects.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above 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 invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.