Cold-formed thin-walled steel exterior composite wallboard filled with magnesium oxysulfate cement and construction method

Abstract

The present invention discloses a cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement and a construction method thereof, which includes an exterior wall panel, a lightweight wall panel, and an air isolation layer between the exterior wall panel and the lightweight wall panel. During construction, the exterior wall panel is prefabricated first; then, exterior wall iron parts are set at positions corresponding to the top of the exterior wall panel skeleton of the exterior wall panel, limit bolts are set in the hollow steel beam corresponding to the bottom, and a suspension structure is set on the embedded steel plate on the outer side of the composite beam or the upper flange of the steel beam used for connecting each exterior wall panel at the edge of the floor slab close to the outside; after completion, the exterior wall panel is fixed through the suspension structure, and a secondary waterproof flexible connection is adopted between every two adjacent exterior wall panels; finally, limit angle steels and lightweight wall panels are set on the top slab and bottom slab of the floor, and an air isolation layer is set between the exterior wall panel and the lightweight wall panel. The present invention realizes the requirements of heat preservation and airtightness performance of the building envelope under the condition of meeting the requirements of ultra-low energy consumption buildings.

Description

Technical Field

[0001] The present invention relates to the technical field of building wall panels, and particularly to a cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement and a construction method thereof. Background Art

[0002] The external hanging method is widely used for prefabricated maintenance exterior walls.

[0003] However, due to the need to adapt to the deformation of the main structure, flexible connections are usually used for the board joints, and the relatively large number of joints results in poor airtight performance of the maintenance.

[0004] Therefore, in the prior art, concrete external wall panels are mostly used for external wall panels, which have a large self-weight, increase the stress on the main structure, and are uneconomical in structural design.

[0005] When the common light steel keel system is used for the exterior wall, the cold-formed thin-walled steel usually does not adopt heat insulation treatment, resulting in relatively serious heat bridges of the cold-formed thin-walled steel and poor heat insulation performance of the wall.

[0006] This leads to the fact that it is very difficult for the prefabricated exterior protection system adopted in the prior art to achieve the heat insulation performance and airtight performance required by ultra-low energy consumption buildings.

[0007] Therefore, how to achieve the heat insulation and airtight performance requirements of the prefabricated building exterior protection system under the requirements of ultra-low energy consumption buildings has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement and a construction method thereof, and the purpose is to achieve the heat insulation and airtight performance requirements of the building exterior protection system under the requirements of ultra-low energy consumption buildings, and to realize the lightweight of the exterior protection system.

[0009] To achieve the above purpose, the present invention discloses a cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement, including an exterior wall panel and a lightweight wall panel arranged on the inner side of the exterior wall panel.

[0010] Wherein, an air isolation layer is arranged between the exterior wall panel and the lightweight wall panel;

[0011] The exterior wall panel includes a precast panel filled with magnesium oxysulfate cement and an exterior wall panel skeleton arranged in the precast panel;

[0012] An insulation coating is arranged on the surface of the exterior wall panel skeleton, and geogrid is arranged at positions corresponding to the inner and outer surfaces of the exterior wall panel;

[0013] On the side of the precast panel facing the outside, a thermal insulation board, a fiberglass mesh cloth and a finishing layer are arranged in sequence from inside to outside;

[0014] The height of the external wall panel matches the floor height of each floor, and the upper end is connected to the outdoor edge of the top plate through multiple sets of suspension structures;

[0015] The lightweight wall panel is arranged between the top plate and the bottom plate of each floor, at the edge position close to the outdoors, and sequentially includes a quartz fiber wall covering airtight layer, a cement mortar plastering layer, and a magnesium oxychloride cement lightweight wall panel from the inside out.

[0016] Preferably, the thickness of the air isolation layer is more than two centimeters;

[0017] The external wall panel skeleton is made of cold-formed thin-walled steel;

[0018] The heat insulation coating is formed on the surface of the external wall panel skeleton by spraying aerosol;

[0019] Each geogrid is a glass fiber geogrid and is fixed to the external wall panel skeleton with self-tapping screws;

[0020] The insulation board is reliably connected to the precast slab through an adhesive and a heat-insulating anchor bolt.

[0021] Preferably, the insulation board is processed from high-efficiency insulation materials including graphite polystyrene insulation board, extruded board, polyurethane board, foam glass board, or perlite concrete board.

[0022] Preferably, each set of the suspension structures includes an external hanging iron part and a limit bolt;

[0023] Each external hanging iron part is arranged at the top of the corresponding external wall panel, and two or more external hanging iron parts are arranged at the top of each external wall panel;

[0024] Each limit bolt is arranged in the hollow steel beam of the external wall panel skeleton at the bottom of the corresponding external wall panel, and the position where each limit bolt is arranged corresponds to the corresponding external hanging iron part on another external wall panel below the corresponding external wall panel;

[0025] Each external hanging iron part includes a flat plate extending towards the corresponding top plate;

[0026] Each flat plate is connected to the embedded steel plate on the outside of the superimposed beam used for connecting with each external wall panel on the top plate or the upper flange of the steel beam;

[0027] Grooves or holes are provided at the upper end and the flat plate of each external hanging iron part to connect with the embedded steel plate on the outside of the superimposed beam or the upper flange of the steel beam by arranging bolts in the grooves or holes, and at the same time connect with the limit bolt of another external wall panel above through the grooves or holes.

[0028] More preferably, each of the slabs is connected to the embedded steel plate on the outer side of the corresponding laminated beam or the upper flange of the steel beam through a pin shaft with a bottom plate embedded in the embedded steel plate on the outer side of the laminated beam or the upper flange of the steel beam.

[0029] Each of the external hanging iron pieces is connected to the external hanging wall panel skeleton through connecting bolts.

[0030] More preferably, a support reinforcement cold-formed thin-walled steel section is provided at each position of the external hanging wall panel skeleton where the external hanging iron piece is provided.

[0031] The support reinforcement cold-formed thin-walled steel section is a steel truss including a plurality of triangular structures built by using steel pipes.

[0032] Preferably, the joints between each of the external hanging wall panels and another adjacent external hanging wall panel adopt a secondary waterproof flexible connection.

[0033] Preferably, limit angle steels are provided at the positions of the top plate and the bottom plate corresponding to the positions where the lightweight wall panels are provided.

[0034] The present invention also provides a construction method for the cold-formed thin-walled steel external hanging composite wall panel filled with magnesium oxysulfate cement, including the following steps:

[0035] Step 1, prefabricate the external hanging wall panel and transport it to the construction site;

[0036] Step 2, set external hanging iron pieces at the positions corresponding to the top of the external hanging wall panel skeleton of the external hanging wall panel, and set limit bolts in the hollow steel beam at the corresponding bottom;

[0037] Step 3, at the edge of the floor top plate close to the outdoors, set a suspension structure on the embedded steel plate on the outer side of the laminated beam or the upper flange of the steel beam used for connecting each of the external hanging wall panels;

[0038] Step 4, fix the external hanging wall panel through the suspension structure;

[0039] Step 5, adopt a secondary waterproof flexible connection between every two adjacent external hanging wall panels;

[0040] Step 6, set limit angle steels and lightweight wall panels on the top plate and the bottom plate of the floor, and at the same time set the air isolation layer between the external hanging wall panel and the lightweight wall panel.

[0041] Preferably, step 1 includes the following steps:

[0042] Step 1.1, manufacture the external hanging wall panel skeleton by using cold-formed thin-walled steel according to the design data of the external hanging wall panel;

[0043] Step 1.2: Form the heat insulation coating on the surface of the external wall panel skeleton by spraying aerosol;

[0044] Step 1.3: Fix fiberglass geogrid at the positions corresponding to the inner and outer sides of the external wall panel on the external wall panel skeleton by self-tapping screws;

[0045] Step 1.4: Place the external wall panel skeleton with the fixed fiberglass geogrid into the mold table, and fill magnesium oxysulfate cement in the mold table to form the precast panel;

[0046] Step 1.5: Connect the insulation board to the side of the precast panel corresponding to the outdoor side of the external wall panel through an adhesive and a heat-insulating anchor bolt;

[0047] Step 1.6: Arrange the fiberglass mesh cloth and the decorative layer on the side of the insulation board corresponding to the outdoor side of the external wall panel.

[0048] Advantages of the present invention:

[0049] The present invention realizes the requirements of heat preservation and airtightness of the building envelope system under the conditions of meeting the requirements of ultra-low energy consumption buildings, and can also reduce the self-weight of the external wall panel.

[0050] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the drawings to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A cross-sectional structure schematic diagram showing an embodiment of the present invention.

[0052] Figure 2 A structure schematic diagram of the external wall panel skeleton of the external wall panel showing an embodiment of the present invention.

[0053] Figure 3 A cross-sectional schematic diagram of the connection structure at the top plate position showing an embodiment of the present invention.

[0054] Figure 4 A cross-sectional schematic diagram of the connection structure at the bottom plate position showing an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] Embodiment

[0056] As Figures 1 to 4 shown, a cold-formed thin-walled steel external composite wall panel filled with magnesium oxysulfate cement includes an external wall panel and a lightweight wall panel arranged on the inner side of the external wall panel.

[0057] Wherein, an air isolation layer 4 is provided between the external wall panel and the lightweight wall panel;

[0058] The external wall panel includes a precast panel 5 filled with magnesium oxysulfate cement, and an external wall panel skeleton 7 arranged inside the precast panel 5;

[0059] The surface of the external wall panel skeleton 7 is provided with a heat insulation coating 8, and geogrid 6 is provided at the positions corresponding to the inner and outer sides of the external wall panel;

[0060] On the side of the precast panel 5 facing the outdoors, there are sequentially arranged a thermal insulation board 9, a fiberglass mesh cloth 10 and a decorative layer 11 from inside to outside;

[0061] The height of the external wall panel matches the floor height of each floor, and the upper end is connected to the edge of the roof close to the outdoors through multiple groups of suspension structures;

[0062] The lightweight wall panel is arranged between the roof and the floor of each floor, at the edge position close to the outdoors, and sequentially includes a quartz fiber wall cloth airtight layer 1, a cement mortar plastering layer 2 and a magnesium oxysulfate cement lightweight wall panel 3 from inside to outside.

[0063] In the present invention, by filling and wrapping cold-formed thin-walled steel sections, the fireproof and heat insulation functions are realized. The thin plastering system with a thermal insulation board on the outer side of the wall can realize the continuous thermal insulation structure on the outer side of the building, and by setting a heat insulation coating 8 on the surface of the external wall panel skeleton 7, the heat bridge effect of the external wall panel skeleton can be reduced, and the heat insulation and airtight performance requirements of the building envelope system are met under the requirements of ultra-low energy consumption buildings.

[0064] In some embodiments, the thickness of the air isolation layer 4 is more than two centimeters;

[0065] The external wall panel skeleton 7 is made of cold-formed thin-walled steel sections;

[0066] The heat insulation coating 8 is formed on the surface of the external wall panel skeleton 7 by spraying aerosol;

[0067] Each geogrid 6 is a fiberglass geogrid and is fixed to the external wall panel skeleton 7 by self-tapping screws;

[0068] The thermal insulation board 9 is reliably connected to the precast panel 5 through an adhesive and a heat-insulating anchor bolt.

[0069] In the present invention, cold-formed thin-walled steel sections, aerosol spraying coatings, fiberglass geogrids, magnesium oxysulfate cement lightweight materials and external thermal insulation thin plastering systems are integrated and innovated. The aerosol spraying coating can realize the heat insulation treatment of cold-formed thin-walled steel sections. The magnesium oxysulfate cement lightweight materials are lightweight and high-strength, and their self-weight is about one-fourth of that of concrete. Therefore, they have more excellent sound insulation, noise reduction, heat insulation, crack resistance, water repellency, fire protection and environmental protection performances under the same weight.

[0070] The fiberglass geogrid replaces the steel mesh in the wall panel, further reducing the thermal bridge. Coupled with the quartz fiber wall cloth airtight layer on the inner side of the composite wall, it can better meet the requirements of heat preservation and airtightness while meeting the requirements of ultra-low energy consumption buildings.

[0071] In some embodiments, the insulation board 9 is processed from high-efficiency insulation materials including graphite polystyrene insulation board, extruded board, polyurethane board, foam glass board or perlite concrete board.

[0072] In some embodiments, each set of suspension structures includes an external hanging iron part 13 and a limit bolt 15;

[0073] Each external hanging iron part 13 is arranged at the top of the corresponding external wall panel, and two or more external hanging iron parts 13 are arranged at the top of each external wall panel;

[0074] Each limit bolt 15 is arranged in the hollow section steel cross beam 16 at the bottom of the external wall panel skeleton 7 corresponding to the external wall panel, and the position where each limit bolt 15 is arranged corresponds to the corresponding external hanging iron part 13 on another external wall panel below the corresponding external wall panel;

[0075] Each external hanging iron part 13 includes a flat plate extending towards the corresponding top plate;

[0076] Each flat plate is connected to the embedded steel plate on the outer side of the superimposed beam 18 used to connect with each external wall panel or the upper flange 19 of the steel beam;

[0077] Grooves or holes 14 are provided at the upper end and the flat plate of each external hanging iron part 13 to connect with the embedded steel plate on the outer side of the superimposed beam 18 or the upper flange 19 of the steel beam by setting bolts in the grooves or holes 14, and at the same time connect with the limit bolt 15 of another external wall panel above through the grooves or holes 14.

[0078] In some embodiments, each flat plate is connected to the embedded steel plate on the outer side of the corresponding superimposed beam 18 or the upper flange 19 of the steel beam through a pin shaft 20 with a bottom plate embedded in the embedded steel plate on the outer side of the superimposed beam 18 or the upper flange 19 of the steel beam;

[0079] Each external hanging iron part 13 is connected to the external wall panel skeleton 7 through a connecting bolt 17.

[0080] In some embodiments, the external wall panel skeleton 7 is provided with a support reinforcement cold-formed thin-walled steel section 24 at the position where the external hanging iron part 13 is provided;

[0081] The support reinforcement cold-formed thin-walled steel section 24 is a steel truss including multiple triangular structures built with steel section steel pipes.

[0082] In practical applications, the setting of the profiled steel truss can enhance the stiffness in the vertical plane at the upper suspension of the composite wall panel.

[0083] In some embodiments, the joints between each external wall panel and an adjacent another external wall panel all adopt a secondary waterproof flexible connection 21.

[0084] In practical applications, the secondary waterproof flexible connection 21 can allow the two adjacent external wall panels to rotate relative to each other and can adapt to the situation where the main structure deforms.

[0085] In some embodiments, the top plate and the bottom plate are both provided with limiting angle steels 22 at the positions corresponding to the lightweight wall panels.

[0086] The present invention also provides a construction method for a cold-formed thin-walled steel external composite wall panel filled with magnesium oxychloride cement, including the following steps:

[0087] Step 1, prefabricate the external wall panel in the factory and transport it to the construction site;

[0088] Step 2, set external iron parts 13 at the positions corresponding to the tops of the external wall panel skeletons 7 of the external wall panels, and set limiting bolts 15 in the hollow profiled steel cross beams 16 corresponding to the bottoms;

[0089] Step 3, at the edge of the floor slab close to the outdoors, set a suspension structure on the embedded steel plate outside the superimposed beam 18 or the upper flange 19 of the steel beam for connecting each external wall panel;

[0090] Step 4, fix the external wall panel through the suspension structure, specifically:

[0091] The upper part of each external wall panel is connected through the flat plate of the external iron part 13 to the embedded steel plate outside the corresponding superimposed beam 18 or the upper flange 19 of the steel beam;

[0092] The lower part of each external wall panel is connected through the limiting bolt 15 to the external iron part 13 of another external wall panel below;

[0093] Step 5, adopt a secondary waterproof flexible connection 21 between every two adjacent external wall panels;

[0094] Step 6, set limiting angle steels 22 and lightweight wall panels on the floor slab and the bottom plate of the floor, and at the same time set an air isolation layer 4 between the external wall panel and the lightweight wall panel.

[0095] In some embodiments, Step 1 includes the following steps:

[0096] Step 1.1, fabricate the external wall panel skeleton 7 with cold-formed thin-walled steel according to the design data of the external wall panel;

[0097] Step 1.2: Form a heat insulation coating 8 on the surface of the external wall panel skeleton 7 by spraying aerosol;

[0098] Step 1.3: Fix fiberglass geogrid at the positions corresponding to the inner and outer surfaces of the external wall panel on the external wall panel skeleton 7 with self-tapping screws;

[0099] Step 1.4: Place the external wall panel skeleton 7 with the fixed fiberglass geogrid into the mold table, and fill magnesium oxysulfate cement in the mold table to form a precast panel 5;

[0100] Step 1.5: Connect a thermal insulation board 9 to the side of the precast panel 5 corresponding to the external wall panel facing the outside through an adhesive and a heat-insulating anchor bolt;

[0101] Step 1.6: Arrange a fiberglass mesh cloth 10 and a decorative layer 11 on the side of the thermal insulation board 9 corresponding to the external wall panel facing the outside.

[0102] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. The cold-formed thin-walled steel exterior composite wallboard filled with magnesium oxysulfate cement comprises an exterior wallboard and a lightweight wallboard arranged on the inner side of the exterior wallboard; it is characterized in that, An air isolation layer (4) is provided between the external wall panel and the lightweight wall panel; The external wall panel comprises a prefabricated panel (5) filled with magnesium oxysulfate cement, and an external wall panel frame (7) arranged in the prefabricated panel (5); The surface of the external wall panel frame (7) is provided with a heat insulation coating (8), and geogrids (6) are provided at positions corresponding to the inner and outer surfaces of the external wall panel; The side of the prefabricated board (5) facing the outside is provided with a heat preservation board (9), a glass fiber mesh cloth (10) and a finishing layer (11) in sequence from the inside to the outside; The height of the external wall panels matches the height of each floor, and the upper end is connected to the edge of the top plate close to the outdoors through multiple sets of hanging structures; The lightweight wallboard is arranged between the top plate and the bottom plate of each floor, close to the edge of the outdoor, and comprises, from the inside to the outside, a quartz fiber wall cloth airtight layer (1), a cement mortar plaster layer (2) and a magnesium oxysulfate cement lightweight wallboard (3); Each group of the suspension structures comprises an external iron piece (13) and a limiting bolt (15); Each of the external iron pieces (13) is arranged on the top of the corresponding external wall panel, and more than two of the external iron pieces (13) are arranged on the top of each external wall panel; Each of the limiting bolts (15) is arranged in a hollow steel beam (16) located at the bottom of the corresponding external wall panel of the external wall panel frame (7), and the position at which each of the limiting bolts (15) is arranged corresponds to the corresponding external iron piece (13) on another external wall panel below the corresponding external wall panel; Each of the external iron parts (13) comprises a flat plate extending toward the corresponding top plate; Each of the flat plates is connected to an upper flange (19) of a pre-buried steel plate or steel beam disposed on the outside of a composite beam (18) on the top plate for connecting with each of the external wall panels; The upper end of each external iron piece (13) and the flat plate are provided with a slot or a hole (14) so ​​as to be connected to the embedded steel plate or the upper flange (19) of the steel beam outside the composite beam (18) by means of bolts arranged in the slot or the hole (14), and at the same time connected to the limiting bolt (15) of another external wall panel above through the slot or the hole (14); Each of the flat plates is connected to the corresponding upper flange (19) of the embedded steel plate or steel beam outside the composite beam (18) via a pin shaft (20) with a bottom plate embedded in the embedded steel plate or steel beam upper flange (19) outside the composite beam (18); Each of the external iron parts (13) is connected to the external wall panel frame (7) via a connecting bolt (17).

2. The cold-formed thin-walled steel exterior composite wallboard filled with magnesium oxysulfate cement according to claim 1, characterized in that, The thickness of the air isolation layer (4) is more than two centimeters; The external wall panel frame (7) is made of cold-bent thin-walled steel; The heat-insulating coating (8) is formed on the surface of the external wallboard frame (7) by spraying aerosol; Each of the geogrids (6) is a glass fiber geogrid and is fixed to the external wall panel frame (7) by using self-tapping screws; The thermal insulation board (9) is reliably connected to the prefabricated board (5) via adhesive and thermal insulation anchor bolts.

3. The cold-formed thin-walled steel ultra-low energy consumption external composite wall panel filled with magnesium oxysulfate cement according to claim 1, characterized in that The heat-insulating board (9) is processed from high-efficiency heat-insulating materials including graphite polystyrene heat-insulating board, extruded board, polyurethane board, foam glass board or perlite concrete board.

4. The cold-formed thin-walled steel exterior composite wallboard filled with magnesium oxysulfate cement according to claim 1, characterized in that The outer wall panel skeleton (7) is provided with a support reinforcement cold-formed thin-walled steel section (24) at the position where the outer hanging iron part (13) is provided. The support reinforcement cold-formed thin-walled steel section (24) is a steel truss including a plurality of triangular structures built with steel pipes of section steel.

5. The cold-formed thin-walled steel exterior composite wallboard filled with magnesium oxysulfate cement according to claim 1, characterized in that, The joint between each outer wall panel and another adjacent outer wall panel adopts a secondary waterproof flexible connection (21).

6. The cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement according to claim 1, wherein The top plate and the bottom plate are both provided with limit angle steels (22) at the positions corresponding to the light wall panels.

7. The construction method of the cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement according to claim 1, characterized in that, It includes the following steps: Step 1, prefabricate the outer wall panel and transport it to the construction site. Step 2, set the outer hanging iron part (13) at the position corresponding to the top of the outer wall panel skeleton (7) of the outer wall panel, and set the limit bolt (15) in the hollow section steel cross beam (16) corresponding to the bottom. Step 3, set a hanging structure on the embedded steel plate outside the composite beam (18) or the upper flange (19) of the steel beam used to connect each outer wall panel at the edge of the floor top plate close to the outside. Step 4, fix the outer wall panel through the hanging structure. Step 5, adopt a secondary waterproof flexible connection (21) between every two adjacent outer wall panels. Step 6, set the limit angle steel (22) and the light wall panel on the top plate and the bottom plate of the floor, and at the same time set the air isolation layer (4) between the outer wall panel and the light wall panel.

8. The construction method of the cold-formed thin-walled steel exterior composite wall panel filled with magnesium oxysulfate cement according to claim 7, characterized in that, Step 1 includes the following steps: Step 1.1, manufacture the outer wall panel skeleton (7) with cold-formed thin-walled steel according to the design data of the outer wall panel. Step 1.2, form the heat-insulating coating (8) on the surface of the outer wall panel skeleton (7) by spraying aerosol. Step 1.3, fix the fiberglass geogrid at the positions corresponding to the inner and outer sides of the outer wall panel on the outer wall panel skeleton (7) with self-tapping screws. Step 1.4, put the outer wall panel skeleton (7) fixed with the fiberglass geogrid into the formwork, and fill the formwork with magnesium oxysulfate cement to form the precast slab (5). Step 1.5, connect the heat-insulating board (9) to the side of the precast slab (5) corresponding to the outer wall panel facing the outside through an adhesive and a heat-insulating anchor bolt. Step 1.6, set the fiberglass mesh cloth (10) and the decorative layer (11) on the side of the heat-insulating board (9) corresponding to the outer wall panel facing the outside.

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