Connecting piece, outer wall body framework and assembly type outer wall body structure of outer wall body framework

Abstract

The utility model relates to a connecting piece, an exterior wall body skeleton and an assembly type exterior wall body structure thereof, the connecting piece comprises a plurality of exterior wall body skeletons, the exterior wall body skeletons are distributed in the circumferential direction, the corners of the adjacent exterior wall body skeletons in the circumferential direction are connected and fixed through right-angle fixing pieces, and pouring cavities of the adjacent exterior wall body skeletons are arranged in a communicated mode. EPS (Expandable Polystyrene) double-foam lightweight concrete is poured in the pouring cavity. The outer wall body framework is clamped on the heat preservation plate through the connecting pieces and fixedly connected with the two side plates, assembly is convenient, and construction efficiency is greatly improved. The connecting piece is fixedly connected with the side plate through the two fixing parts, so that the contact area between the connecting piece and the side plate is increased, and the stability after the connecting piece and the side plate are connected is improved. The connecting pieces are connected into a whole through the connecting pieces, so that the longitudinal tensile strength of the outer wall framework is enhanced while the insulation board is clamped and fixed. The outer wall frameworks are connected and fixed through the right-angle fixing pieces, assembly is convenient, and the market application of the assembly type wall building house is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building walls, in particular to a connecting piece, an external wall frame and an assembled external wall structure thereof. Background Art

[0002] At present, most of the existing building walls in my country are brick-concrete structures that use a construction method of supporting formwork on site, pouring concrete and then removing the formwork. This method has heavy walls, slow construction speed, and a lot of material waste. With the rapid development of my country's residential industry, it has gradually failed to meet the efficient and simple design concepts advocated by modern new technologies. With the development of new building industrialization and intelligent construction, the application research of new prefabricated buildings with multi-functional integration such as environmental protection, energy saving, and thermal insulation is being widely carried out.

[0003] At present, threaded metal rod connectors used in assembled walls on the market can meet the tensile strength of the inner and outer leaf walls, but due to the large thermal conductivity of metal, a thermal bridge is formed in the wall, which increases the heat loss of the wall, and the contact area between the threaded metal rod and the wall panel is small, and the stability after connection is poor; and the connectors between the walls are independently set. Although the connectors can well fix the wall panels on both sides in the horizontal direction, the tensile strength of the connectors on the wall in the vertical direction is weak, and the longitudinal strength of the wall is poor. During the concrete pouring construction, if the impact load of the concrete is too large, the vibration time is too long, and the reinforcement is not in place, it is very easy to cause the wall panel to deform during the concrete pouring process, and the subsequent processing is more cumbersome. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a connecting piece, an external wall frame and an assembled external wall structure thereof.

[0005] The utility model is realized through the following technical scheme: a connecting piece, comprising a connecting portion and a fixing portion, wherein both ends of the connecting portion in the length direction expand and extend in a direction away from the connecting portion to form the fixing portion, and the cross-sectional area of ​​one end of the fixing portion away from the connecting portion is larger than the cross-sectional area of ​​the end portion of the connecting portion.

[0006] In this solution, the end of the connecting part extends outward to form a fixed part, and the cross-sectional size of the rear end is increased, thereby increasing the contact area with the wall, so that the connection between the connecting piece and the wall is more stable.

[0007] As an optimization, the two sides of the end face of the connecting portion extend in a direction away from the connecting portion and sequentially form a first side and a second side of the fixing portion, the two first sides are tilted in a direction away from each other, the two second sides are relatively parallel, the ends of the two second sides are connected to form a third side of the fixing portion, and the third side is parallel to the end face of the connecting portion. In this optimization solution, the first sides are tilted away from each other to increase the end face size of the connecting portion, and the third side is parallel to the end face of the connecting portion, so that the side plates connected at both ends of the connector are relatively parallel.

[0008] As an optimization, the top surface of the connection part is provided with two recessed grooves, and the two ends of the recessed grooves penetrate the connection part along the width direction of the connection part. This optimization solution facilitates the clamping and fixing of the connection piece by providing recessed grooves on the connection part.

[0009] An exterior wall skeleton comprises two side panels, an insulation board and the connecting piece described in any embodiment of the present application, wherein the two side panels are located on the left and right sides of the insulation board and are arranged opposite to the insulation board, a casting cavity is formed between the two side panels, the insulation board divides the casting cavity into left and right parts, the connecting piece is distributed along the length direction of the casting cavity, the connecting piece passes through the insulation board and is fixedly connected to the two side panels at both ends, and also comprises a connecting piece, which extends along the distribution direction of the connecting piece and is fixedly connected to the connecting piece.

[0010] In this solution, the connecting piece passes through the insulation board to connect and fix the two side panels, so that the insulation board and the side panels on both sides form casting cavities respectively, which is easy to assemble. The connecting piece in the casting cavity is fixed by the connecting piece, so that the connecting piece becomes a whole. The first connecting piece connected as a whole greatly improves the longitudinal tensile strength of the first side panel, thereby enhancing the overall structural strength of the exterior wall skeleton.

[0011] As an optimization, at least two layers of connectors are distributed in the casting cavity along the height direction, and the number of connectors in each layer is set to be several, and all connectors in the same layer are connected as a whole through the same connecting piece. In this optimization scheme, multiple layers of connectors are arranged in the height direction of the casting cavity to further enhance the stability and structural strength of the outer wall skeleton.

[0012] As an optimization, connecting pieces are provided on the left and right sides of the insulation board, and the two connecting pieces are respectively fixed in the two sinks of the connecting pieces and clamp the insulation board. In this optimization solution, the connecting pieces on the same layer are connected by two connecting pieces, making the connection between the connecting pieces on the same layer more stable, further enhancing the strength of the wall frame tension fixation, and at the same time, the insulation board in the middle is clamped by two connecting pieces to prevent the insulation board from shaking and displacement, thereby improving the stability of the insulation board and facilitating pouring.

[0013] As an optimization, an insulation board is provided between each two adjacent connectors in the length direction of the casting cavity, and slots are provided at both ends of the insulation board to penetrate the insulation board in the thickness direction of the insulation board, and two adjacent slots of adjacent insulation boards form fixing holes that fit the connecting parts of the connectors. In this optimization solution, the insulation boards are fixed by the connectors engaging in the slots at both ends of the insulation boards, which facilitates the assembly of the insulation boards.

[0014] As an optimization, a vertically extending reinforcement is fixed to the inner wall of the side panel, and the two ends of the connecting member are respectively fixed to the reinforcements on the two side panels. This optimization solution reinforces the side panels with reinforcements to prevent the side panels from deforming due to mold expansion during pouring. At the same time, the connecting member and the reinforcement are fixed to make the connection between the connecting member and the side panel more stable.

[0015] As an optimization, the cross section of the reinforcement includes a second horizontal side fixedly connected to the inner wall of the side panel, the two ends of the second horizontal side are bent on the same side to form a second vertical side, the fixing portion is embedded between the two second vertical sides and fixedly connected to the second vertical sides, and the ends of the two second vertical sides are bent in a direction away from each other to form a third horizontal side. The reinforcement of this optimization solution fixes the side panel through the second horizontal side, and the fixing portion of the connector is engaged with the two second vertical sides, so that the connection between the connector and the reinforcement is more stable. After pouring concrete in the casting cavity, the two third horizontal sides are engaged in the formed concrete, so that the connection between the reinforcement and the wall is more tightly connected, thereby enhancing the strength of the wall structure.

[0016] An assembled exterior wall structure comprises a plurality of exterior wall frames as described in any one of the embodiments of the present application, wherein the plurality of exterior wall frames are circumferentially distributed, the corners of circumferentially adjacent exterior wall frames are connected and fixed by right-angle fixing members, and the casting cavities of adjacent exterior wall frames are connected, and concrete is poured in the casting cavities.

[0017] In this solution, adjacent exterior wall frames are connected and fixed by right-angle fixings, which is easy to assemble and can be assembled into a variety of wall structures according to needs. It is widely applicable and greatly improves the market application of prefabricated wall building.

[0018] The beneficial effects of the utility model are as follows: the outer wall frame of the present application is engaged in the slot of the insulation board and connected and fixed with the two side panels through the connecting piece, so that the insulation board and the side panels on both sides form a casting cavity respectively, which is convenient to assemble and easy to assemble, greatly improving the construction efficiency. The connecting piece is engaged and fixed with the reinforcing piece on the side panel through two fixing parts, which increases the contact area between the connecting piece and the side panel, thereby increasing the stability after the connecting piece and the side panel are connected. The two sides of the insulation board connect the connecting pieces of the same layer into a whole through two connecting pieces, which further clamps and fixes the insulation board, and also enhances the strength and stability of the side panel, and enhances the longitudinal tensile strength of the outer wall frame. The outer wall frame is an assembled structure, and the building wall is formed by cast-in-place concrete, and there is no need to remove the mold, which meets the requirements of the new industrialized building for the new assembled building, and is suitable for promotion and application. In addition, the outer wall frames are connected and fixed by right-angle fixing pieces, which is convenient to assemble, and can be assembled into a variety of wall structures according to the requirements of the architectural drawings. It is widely applicable and greatly improves the market application of assembled wall building. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top view of the connecting part;

[0020] Figure 2 It is a schematic diagram of the front view structure of the connecting part;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting member and the connecting piece;

[0022] Figure 4 It is a schematic diagram of the structure of the outer wall skeleton from a top view;

[0023] Figure 5 for Figure 4 A magnified view of part A;

[0024] Figure 6 It is a schematic diagram of the side structure of the external wall skeleton;

[0025] Figure 7 It is a schematic diagram of the structure of the insulation board;

[0026] Figure 8 It is a top view of the structure of embodiment 1;

[0027] Fig. 9 for Figure 8 A magnified view of part A;

[0028] Fig.10 for Figure 8 A magnified view of part B;

[0029] Fig.11 It is a top view of the structure of the second embodiment;

[0030] Fig.12 for Fig.11 A magnified view of part A;

[0031] Fig.13 This is a top view of the structure of Embodiment 3;

[0032] Fig.14 for Fig.13 A magnified view of part A;

[0033] As shown in the figure:

[0034] 1. reinforcement, 11. second horizontal side, 12. second vertical side, 13. third horizontal side, 2. connector, 21. connecting part, 22. fixing part, 221. first side, 222. second side, 223. third side, 23. sink, 24. second mounting hole, 25. first mounting hole, 3. connecting piece, 31. first horizontal side, 32. first vertical side, 4. side panel, 5. EPS double-bubble lightweight concrete, 6. insulation board, 61. slot, 7. right-angle fixing part, 8. U-shaped sealing plate. DETAILED DESCRIPTION

[0035] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0036] Embodiment 1:

[0037] An assembled exterior wall structure comprises a plurality of exterior wall frames as described in any one of the embodiments of the present application, wherein the plurality of exterior wall frames are distributed circumferentially, and the corners of the circumferentially adjacent exterior wall frames are connected and fixed by right-angle fixing members 7, and the casting cavities of the adjacent exterior wall frames are connected.

[0038] like Figures 1 to 7 As shown, the outer wall skeleton includes two side panels 4, an insulation board 6 and the connector 2 described in any embodiment of the present application. The two side panels 4 are located on the left and right sides of the insulation board 6 and are arranged opposite to the insulation board. A casting cavity is formed between the two side panels 4, and the insulation board 6 divides the casting cavity left and right. The connector 2 is distributed along the length direction of the casting cavity. The connector 2 passes through the insulation board 6 and is fixedly connected to the two side panels 4 at both ends. It also includes a connecting piece 3, which extends along the distribution direction of the connector 2 and is fixedly connected to the connector. EPS double-bubble lightweight concrete 5 can be poured in the casting cavity on the left and right sides of the insulation board. The side panels 4 are provided with seepage holes that penetrate the side panels along the thickness direction of the side panels. When pouring concrete, slurry can seep out through the seepage holes to avoid incomplete pouring in the casting cavity. The side panels 4 described in this embodiment are metal expanded mesh panels with a thickness of 0.4 mm.

[0039] like Figures 1 to 3 As shown, specifically, the connecting member 2 is made of high-strength plastic material and is integrally formed by 3D printing, and includes a connecting portion 21 and a fixing portion 22. Both ends of the connecting portion 21 in the length direction expand and extend in a direction away from the connecting portion to form the fixing portion 22. The cross-sectional area of ​​one end of the fixing portion 22 away from the connecting portion is larger than the cross-sectional area of ​​the end of the connecting portion 21.

[0040] like Figure 3 As shown, the connection portion 21 described in this embodiment is a rod-shaped structure with a rectangular end face. Both sides of the end face of the connection portion 21 extend in a direction away from the connection portion and sequentially form a first side 221 and a second side 222 of the fixing portion 22. The ends of the two first sides 221 away from the connection portion extend obliquely in a direction away from each other, and the two first sides 221 have the same inclination angle. The two second sides 222 extend relatively parallel to each other in a direction away from the first sides, and the ends of the two second sides are connected to form a third side 223 of the fixing portion, and the third side 223 is arranged parallel to the end face of the connection portion 21. The second side 222 of the fixing portion described in this embodiment is provided with a first mounting hole 25 that penetrates the fixing portion inwardly.

[0041] like Figure 4 , 6As shown, specifically, a vertically extending reinforcement member 1 is fixedly connected to the inner wall of the side panel 4, and the reinforcement members 1 are distributed along the length direction of the side panel 4. The reinforcement members 1 on the two side panels 4 are arranged opposite to each other, and the two ends of the connecting member 2 are respectively fixedly connected to the two opposite reinforcement members 1 on the two side panels. The reinforcement member 1 extends along the height direction of the side panel and is fixed to the ground or the top surface. The side panel is supported by the reinforcement member to prevent deformation in the length direction of the side panel. The two reinforcement members are connected and fixed by the connecting member to prevent the side panel from expanding outward during casting.

[0042] like Figure 5 As shown, the reinforcement member described in this embodiment is a light steel keel, and the cross section of the reinforcement member 1 includes a second horizontal side 11 fixedly connected to the inner wall of the side panel 4. In this embodiment, the side panel 4 and the second horizontal side 11 are screwed and fixed by self-tapping screws. The two ends of the second horizontal side 11 are bent on the same side to form a second vertical side 12, and the fixing portion 22 of the connecting member 2 is embedded between the two second vertical sides 12 and fixed to the second vertical side. The ends of the two second vertical sides are bent in a direction away from each other to form a third horizontal side 13. In this embodiment, the spacing between the two second vertical sides 12 is adapted to the length of the third side 223 of the fixing portion, so that the fixing portion is embedded and clamped between the two second vertical sides, and the fixing portion cannot shake, further improving the stability after connection. The second vertical side 12 is provided with a through hole corresponding to the first mounting hole 25, and the second vertical side and the first mounting hole are screwed and fixed by external hexagonal bolts.

[0043] like Figure 4 , 6 As shown, specifically, several layers of connectors 2 are distributed in the height direction of the casting cavity, and at least one layer of connectors 2 is respectively arranged at the upper end and the lower end of the casting cavity in the height direction, and each layer of connectors 2 is distributed along the length direction of the casting cavity. Several reinforcing members 1 corresponding to the several connectors 2 are distributed along the length direction of the side plate 4, and connectors and reinforcing members are respectively arranged at least at the left and right ends in the length direction of the casting cavity. In this embodiment, the spacing of each layer of connectors 2 in the height direction is between 1.2 meters and 1.5 meters.

[0044] like Figure 4 , 7 As shown, the insulation board 6 is a polystyrene board with excellent insulation, waterproof and fireproof effects. An insulation board 6 is arranged between each two adjacent connectors in the length direction of the casting cavity. Both ends of the insulation board 6 are provided with a card slot 61 that penetrates the insulation board along the thickness direction of the insulation board. The two card slots at one end of the adjacent insulation board 6 close to each other form a fixing hole that fits the connecting part 21 of the connector 2. The number of fixing holes in the height direction of the insulation board 6 is the same as the number of layers of the connector 2 in the height direction of the casting cavity. During assembly, the insulation board is fixed by respectively engaging the adjacent connectors in the card slots at both ends of the insulation board, and the insulation boards are installed one by one along the length direction of the casting cavity, thereby dividing the casting cavity into two parts, the left and the right, which is convenient to assemble and efficient to install.

[0045] like Figure 4 , 6 As shown, in order to enhance the stability between the several connectors 2 in each layer, all the connectors 2 in the same layer are connected as a whole through the same connecting piece 3. At the same time, in order to further fix the insulation board and improve the stability of the insulation board, the insulation board 6 in this embodiment is provided with connecting pieces 3 on the left and right sides respectively, and the connectors 2 in the same layer are connected as a whole through two connecting pieces 3 distributed on the left and right sides, and the insulation board 6 in the middle is further clamped and fixed by the two connecting pieces 3 to prevent the insulation board from shaking and displacement.

[0046] like Figure 3 As shown, specifically, the cross section of the connecting piece 3 includes a first horizontal side 31, and one end of the first horizontal side 31 is bent to form a first vertical side 32. Two recesses 23 are provided on the top surface of the connecting portion 21 of the connecting piece, and both ends of the recesses 23 penetrate the connecting portion along the width direction of the connecting portion. The width and depth of the recesses 23 are adapted to the width and thickness of the first horizontal side 31, and the spacing between the two recesses 23 is adapted to the thickness of the insulation board 6. The first horizontal sides 31 of the two connecting pieces 3 are respectively fixed in the two recesses 23 of the connecting piece, and the first vertical sides 32 of the two connecting pieces are close to each other and clamp and fix the insulation board 6.

[0047] The two recessed grooves 23 of the connecting member 2 in this embodiment are provided with second mounting holes 24 that penetrate downward through the connecting portion, the first horizontal side 31 is provided with through holes corresponding to the second mounting holes 24, and the first horizontal side and the second mounting holes are screwed together by hexagonal bolts.

[0048] like Fig.10 As shown, according to actual on-site usage requirements, the port in the length direction of the outer wall frame can be blocked by a U-shaped sealing plate 8. The U-shaped sealing plate 8 extends along the height direction of the outer wall frame, and the end of the outer wall frame is engaged in the opening of the U-shaped sealing plate 8. The two vertical sides of the U-shaped sealing plate 8 and the two sides of the outer wall frame are fixedly connected by self-tapping screws.

[0049] like Figure 8 , 9 As shown, the assembled exterior wall structure of this embodiment includes two exterior wall frames, which are distributed in an L-shaped structure. The connecting pieces at the ends of the horizontal exterior wall frames and the connecting pieces 2 at the ends of the vertical exterior wall frames are vertically connected, and the casting cavities of the two exterior wall frames are connected.

[0050] Specifically, a right-angle corner formed by the side panels on the inner sides of the two outer wall frames is fixedly connected by a right-angle fixing piece 7. There are a plurality of right-angle fixing pieces 7 distributed along the height direction of the outer wall frame, and the number of right-angle fixing pieces 7 is the same as the number of connecting pieces 2 in the height direction of the outer wall frame and they are arranged one by one. The right-angle fixing piece 7 is an L-shaped structure, and the two straight sides of the right-angle fixing piece are respectively screwed and fixed to the connecting pieces 2 at the ends of the two outer wall frames.

[0051] A first extension plate is provided at the end of the side panel 4 on the outside of the horizontal outer wall frame, and a second extension plate is provided at the end of the side panel 4 on the outside of the vertical outer wall frame. The ends of the first extension plate and the second extension plate are vertically connected. The first extension plate and the second extension plate are also 0.4mm thick metal expanded mesh plates. A casting cavity is formed between the first extension plate, the second extension plate and the two outer wall frames, and EPS double-bubble lightweight concrete 5 is poured in the casting cavity.

[0052] Embodiment 2:

[0053] like Fig.11 , 12 As shown, the difference between this embodiment and embodiment one is that the prefabricated exterior wall structure of this embodiment includes three exterior wall frames, the three exterior wall frames are distributed in a T-shaped structure, two vertical exterior wall frames are located on both sides of the end of the horizontal exterior wall frame and are arranged opposite to each other, the casting cavities of the three exterior wall frames are interconnected, and the two right-angle corners formed between the three exterior wall frames are fixed by the right-angle fixing member 7.

[0054] A third extension plate is provided between the side plates of the two vertical outer wall frames away from the horizontal outer wall frames. The third extension plate is a metal expanded mesh plate with a thickness of 0.4 mm. The two ends of the third extension plate and the side plates of the two vertical outer wall frames are connected as a whole. A casting cavity is formed between the third extension plate and the three outer wall frames, and EPS double-bubble lightweight concrete 5 is poured in the casting cavity.

[0055] Embodiment three:

[0056] like Fig.13 , 14 As shown, the difference between this embodiment and all the above embodiments is that the assembled exterior wall structure of this embodiment includes four exterior wall frames, the four exterior wall frames are distributed in a cross-shaped structure, the casting cavities of the four exterior wall frames are interconnected, the four right-angle corners formed between the four exterior wall frames are fixed by the right-angle fixing parts 7, and EPS double-bubble lightweight concrete 5 is poured in the casting cavity.

[0057] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A connector, characterized in that: It comprises a connecting portion (21) and a fixing portion (22), wherein both ends of the connecting portion (21) in the length direction expand and extend in a direction away from the connecting portion to form the fixing portion (22), and the cross-sectional area of ​​one end of the fixing portion (22) away from the connecting portion is larger than the cross-sectional area of ​​the end of the connecting portion (21).

2. A connector according to claim 1, characterized in that: Both sides of the end surface of the connecting portion (21) extend in a direction away from the connecting portion and sequentially form a first side edge (221) and a second side edge (222) of the fixing portion, the two first side edges (221) being arranged in an inclined direction away from each other, the two second side edges (222) being relatively parallel, the ends of the two second side edges being connected to form a third side edge (223) of the fixing portion, the third side edge being parallel to the end surface of the connecting portion (21).

3. A connector according to claim 1, characterized in that: The top surface of the connecting portion (21) is provided with two recessed grooves (23), with both ends of the recessed grooves penetrating the connecting portion along the width direction of the connecting portion.

4. An external wall frame, characterized in that: The invention comprises two side panels (4), an insulation board (6) and a connecting piece (2) as claimed in any one of claims 1 to 3, wherein the two side panels (4) are located on the left and right sides of the insulation board (6) and are arranged opposite to the insulation board, a casting cavity is formed between the two side panels, the insulation board divides the casting cavity into left and right parts, the connecting piece (2) is distributed along the length direction of the casting cavity, the connecting piece (2) passes through the insulation board (6) and its two ends are respectively fixedly connected to the two side panels (4), and further comprises a connecting piece (3), the connecting piece extends along the distribution direction of the connecting piece (2) and is fixedly connected to the connecting piece.

5. An exterior wall frame according to claim 4, characterized in that: At least two layers of connecting pieces (2) are distributed in the casting cavity along the height direction, each layer has a plurality of connecting pieces, and all connecting pieces in the same layer are connected as a whole via the same connecting piece (3).

6. An exterior wall frame according to claim 4, characterized in that: Connecting plates (3) are respectively provided on the left and right sides of the insulation board (6); the two connecting plates (3) are respectively fixed in two sink grooves (23) of the connecting member and clamp and fix the insulation board (6).

7. An exterior wall frame according to claim 4, characterized in that: An insulation board (6) is provided between every two adjacent connecting pieces (2) in the length direction of the casting cavity, and both ends of the insulation board (6) are provided with clamping grooves (61) penetrating the insulation board in the thickness direction of the insulation board, and two adjacent clamping grooves of adjacent insulation boards form fixing holes that are clamped and matched with the connecting pieces (2).

8. The outer wall frame according to claim 4, characterized in that: A vertically extending reinforcement member (1) is fixedly connected to the inner wall of the side plate (4), and both ends of the connecting member are respectively fixedly connected to the reinforcement members on the two side plates.

9. An external wall frame according to claim 8, characterized in that: The cross section of the reinforcement member (1) comprises a second horizontal side (11) fixedly connected to the inner wall of the side plate, two ends of the second horizontal side are bent on the same side to form a second vertical side (12), the fixing portion (22) is embedded between the two second vertical sides (12) and fixedly connected to the second vertical sides, and the ends of the two second vertical sides are bent in a direction away from each other to form a third horizontal side (13).

10. An assembled exterior wall structure, characterized in that: It comprises a plurality of external wall frames as described in any one of claims 4 to 9, wherein the plurality of external wall frames are distributed circumferentially, the corners of the circumferentially adjacent external wall frames are connected and fixed by right-angle fixing members (7), and the casting cavities of the adjacent external wall frames are connected, and concrete (5) is poured in the casting cavities.

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