Wind-resistant stabilizing structure of assembled rectangular pyramid flexible photovoltaic support

Abstract

The utility model provides a wind-resistant stabilizing structure of an assembled rectangular pyramid flexible photovoltaic support, comprising a rectangular pyramid frame which comprises a pair of transverse square tube prefabricated parts; the transverse square tube prefabricated part comprises a transverse square tube, a pair of U-shaped connecting plates are symmetrically arranged at the bottom of the transverse square tube, and a pair of connecting plates arranged between the U-shaped connecting plates are symmetrically arranged at the top and the bottom of the transverse square tube; a pair of longitudinal square pipes are arranged between U-shaped connecting plates of the pair of transverse square pipe prefabricated parts, a pair of mounting plates are arranged on the side walls of the pair of longitudinal square pipes, vertical square inclined pipes are arranged between the pair of mounting plates, rectangular pyramid bases are arranged on the side walls of the vertical square inclined pipes, and horizontal square inclined pipes are arranged between connecting plates of the pair of transverse square pipe prefabricated parts. The wind-resistant and energy-saving window frame has the advantages that the wind-resistant and energy-saving window frame is reasonable in structure, high in space rigidity, easy to assemble and excellent in wind-resistant performance.

Description

Technical Field

[0001] This utility model relates to photovoltaic brackets, specifically, to a wind-resistant and stable structure for a modular, four-sided pyramidal flexible photovoltaic bracket. Background Technology

[0002] With the expansion of photovoltaic power plants and the diversification of geographical environments, higher demands are placed on the adaptability and maintainability of photovoltaic support systems. Existing flexible photovoltaic support systems have insufficient torsional stiffness, making them prone to irregular wind-induced vibrations under wind loads, which can lead to microcracks in the modules. Furthermore, the installation of current flexible photovoltaic support systems often requires extensive on-site welding or fastening, increasing construction difficulty and cost. Uncontrollable welding quality can also result in uneven structural strength, affecting wind resistance. Therefore, there is an urgent need for a modular, four-sided pyramidal flexible photovoltaic support system to address these problems. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a wind-resistant and stable modular four-sided pyramidal flexible photovoltaic support structure to solve the problems mentioned in the background technology. This utility model has a reasonable structure, strong spatial rigidity, is easy to assemble, and has excellent wind resistance performance.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a wind-resistant and stable modular four-sided pyramidal flexible photovoltaic support structure, comprising:

[0005] The four-sided pyramid frame includes a pair of horizontal square tube prefabricated components, a longitudinal square tube, a mounting plate, a vertical square oblique tube, a horizontal square oblique tube, a fixing plate, and a four-sided pyramid base;

[0006] The prefabricated component of the horizontal square tube includes a horizontal square tube, a pair of U-shaped connecting plates symmetrically arranged at the bottom of the horizontal square tube, and a pair of connecting plates placed between the pair of U-shaped connecting plates symmetrically arranged at the top and bottom of the horizontal square tube.

[0007] A pair of longitudinal square tubes are provided between the U-shaped connecting plates of a pair of transverse square tube prefabricated components. A pair of mounting plates are provided on the side walls of the pair of longitudinal square tubes. A vertical square oblique tube is provided between the pair of mounting plates. A four-sided pyramid base is provided on the side wall of the vertical square oblique tube. A horizontal square oblique tube is provided between the connecting plates of a pair of transverse square tube prefabricated components. A fixing plate is provided at the end of the side wall of the pair of transverse square tubes.

[0008] At least two quadrangular pyramid frames are provided. A steel wire rope is provided between the horizontal square tube on one of the adjacent quadrangular pyramid frames and the quadrangular pyramid base on the other adjacent quadrangular pyramid frame. A row of triangular support rods is provided between the quadrangular pyramid base on one of the adjacent quadrangular pyramid frames and the fixed plate on the other adjacent quadrangular pyramid frame.

[0009] Furthermore, the quadrangular pyramid base includes a base plate and a pair of side ribs. The base plate is set on the side wall of the vertical square oblique tube, and the pair of side ribs are symmetrically set on the side wall of the base plate. A first through hole is opened on one side of each pair of side ribs, and a second through hole is opened on the other side of each pair of side ribs. A suspension hole is opened at the end of the side wall of the pair of horizontal square tubes away from the fixed plate. A steel wire rope is set between the suspension hole on one of the adjacent quadrangular pyramid frames and the second through hole on the other adjacent quadrangular pyramid frame. A row of triangular support rods is set between the first through hole on one of the adjacent quadrangular pyramid frames and the fixed plate on the other adjacent quadrangular pyramid frame.

[0010] Furthermore, a pair of first rope clips are symmetrically arranged on the horizontal square tubes of each pair of horizontal square tube prefabricated components, and a component cable perpendicular to the horizontal square tube passes through the first rope clip on the adjacent horizontal square tubes. The component cable is used to support the photovoltaic module.

[0011] Furthermore, a pair of second rope clips (9) are provided at the bottom of the base plate (81), and a stabilizing cable (5) passes through the second rope clips (9). The stabilizing cable (5) is used to provide support for the component cable (61), and the stabilizing cable (5) and the component cable (61) form a spatial triangular prism structure.

[0012] Furthermore, a pair of second rope clips are provided at the bottom of the base plate, and a stabilizing cable passes through the second rope clips.

[0013] Furthermore, both the first and second rope clips are equipped with fixing components;

[0014] The fixing component includes a pair of threaded posts symmetrically arranged on the first rope clamp or the second rope clamp, each of the threaded posts being provided with a fixing nut, and the pair of threaded posts penetrating the transverse square tube or the four-sided pyramidal base.

[0015] Furthermore, mounting bolts are provided between the longitudinal square tube and the U-shaped connecting plate, between the longitudinal square tube and the mounting plate, between the vertical square oblique tube and the mounting plate, between the square pyramid base and the vertical square oblique tube, between the connecting plate and the horizontal square oblique tube, and between the row triangular support rod and the square pyramid base and the fixing plate, respectively. Mounting nuts are provided on the mounting bolts.

[0016] Furthermore, the connecting plates on the pair of said transverse square tube prefabricated components are diagonally distributed.

[0017] This utility model discloses a modular, flexible, four-sided pyramidal photovoltaic support structure designed for wind resistance and stability. By using a five-sided pyramidal frame as a spatial pentahedron, each plane is a stable triangle, ensuring the structure's inherent stability and reliability. Adjacent pyramidal frames are reliably connected using inter-row triangular support rods and steel wire ropes, combining rigidity and flexibility to significantly enhance the overall spatial rigidity and wind resistance of the pyramidal frame. It also absorbs wind vibration energy, ensuring the stable operation of photovoltaic modules in harsh wind environments. The flexible connection technology reduces the impact of wind vibration on photovoltaic modules and the risk of microcracks. Each component of this application can be manufactured and processed in a standardized factory, ensuring the quality of each component of the pyramidal frame is effectively guaranteed. The parts are dimensionally accurate, and the component strength is uniform, which greatly improves the overall assembly effect and stress performance of the pyramidal frame. It facilitates rapid on-site assembly, significantly reducing on-site welding and fastening work, shortening the construction cycle, and avoiding material waste caused by material errors. It is highly economical, and the modular design allows for the replacement of local components at any time, reducing later maintenance costs. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a perspective view of the quadrangular pyramid frame in a wind-resistant and stable structure of an assembled quadrangular pyramid flexible photovoltaic support according to an embodiment of the present invention;

[0020] Figure 2 According to an embodiment of the present utility model Figure 1 Enlarged view of A in the middle;

[0021] Figure 3 According to an embodiment of the present utility model Figure 1 Enlarged view of B in the middle;

[0022] Figure 4 According to an embodiment of the present utility model Figure 1 Enlarged view of C;

[0023] Figure 5 This is a perspective view of the quadrangular pyramid base in a wind-resistant and stable structure of an assembled quadrangular pyramid flexible photovoltaic support according to an embodiment of the present invention.

[0024] Figure 6 This is a three-dimensional view of the quadrangular pyramid base in a wind-resistant and stable structure of an assembled quadrangular pyramid flexible photovoltaic support according to an embodiment of the present invention.

[0025] Figure 7 This is a perspective view of the assembly of four-sided pyramidal frames in a wind-resistant and stable structure of a modular four-sided pyramidal flexible photovoltaic support according to an embodiment of the present invention.

[0026] Figure 8 According to an embodiment of the present utility model Figure 7 Enlarged view of D;

[0027] Figure 9 According to an embodiment of the present utility model Figure 7 Enlarged view of E in the middle;

[0028] Figure 10 This is a top view of a transverse square tube prefabricated component in a wind-resistant and stable structure of an assembled quadrangular pyramidal flexible photovoltaic support according to an embodiment of the present invention.

[0029] Figure 11 This is a left view of a transverse square tube prefabricated component in a wind-resistant and stable structure of an assembled quadrangular pyramidal flexible photovoltaic support according to an embodiment of the present invention.

[0030] Figure 12 This is a perspective view of the assembly of four-sided pyramidal frames in a wind-resistant and stable structure of a modular four-sided pyramidal flexible photovoltaic support according to an embodiment of the present invention.

[0031] In the diagram: 1. Horizontal square tube prefabricated component; 101. Horizontal square tube; 1011. Suspension hole; 102. U-shaped connecting plate; 103. Connecting plate; 2. Longitudinal square tube; 3. Mounting plate; 4. Vertical square inclined tube; 5. Stabilizing cable; 6. First rope clamp; 61. Component cable; 7. Horizontal square inclined tube; 8. Four-sided pyramid base; 81. Base plate; 82. Side rib plate; 821. First through hole; 822. Second through hole; 9. Second rope clamp; 10. Mounting bolt; 11. Inter-row triangular support rod; 12. Steel wire rope; 13. Fixing plate. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] like Figure 1 As shown, this utility model provides a technical solution: a wind-resistant and stable structure for a modular, four-sided pyramidal flexible photovoltaic support, comprising:

[0034] The four-sided pyramid frame includes a pair of horizontal square tube prefabricated components 1, a longitudinal square tube 2, a mounting plate 3, a vertical square oblique tube 4, a horizontal square oblique tube 7, a fixing plate 13, and a four-sided pyramid base 8.

[0035] Reference Figure 10 and Figure 11The prefabricated horizontal square tube component 1 includes a horizontal square tube 101. A pair of U-shaped connecting plates 102 are symmetrically arranged at the bottom of the horizontal square tube 101. A pair of connecting plates 103 are symmetrically arranged at the top and bottom of the horizontal square tube 101 and placed between the pair of U-shaped connecting plates 102. The U-shaped connecting plates 102, the horizontal square tube 101, and the connecting plates 103 in the prefabricated horizontal square tube component 1 are welded together by fillet welds.

[0036] A pair of longitudinal square tubes 2 are provided between the U-shaped connecting plates 102 of a pair of transverse square tube prefabricated components 1. A pair of mounting plates 3 are provided on the side walls of the pair of longitudinal square tubes 2. A vertical square inclined tube 4 is provided between the pair of mounting plates 3. A four-sided pyramid base 8 is provided on the side wall of the vertical square inclined tube 4. A horizontal square inclined tube 7 is provided between the connecting plates 103 of a pair of transverse square tube prefabricated components 1. A fixing plate 13 is provided at the end of the side wall of a pair of transverse square tubes 101.

[0037] At least two quadrangular pyramid frames are provided. A steel wire rope 12 connects the horizontal square tube 101 on one adjacent quadrangular pyramid frame to the quadrangular pyramid base 8 on the other adjacent quadrangular pyramid frame. A row of triangular support rods 11 connects the quadrangular pyramid base 8 on one adjacent quadrangular pyramid frame to the fixed plate 13 on the other adjacent quadrangular pyramid frame. This design uses the quadrangular pyramid frame as a spatial pentahedron, ensuring that each plane is a stable triangle, making the structure itself stable and reliable. The adjacent quadrangular pyramid frames are reliably connected by the row of triangular support rods 11 and the steel wire rope 12, achieving a balance of rigidity and flexibility, greatly enhancing the overall spatial rigidity and wind resistance of the quadrangular pyramid frame. By absorbing wind vibration energy and ensuring the stable operation of photovoltaic modules in harsh wind environments, the flexible connection technology reduces the impact of wind vibration on photovoltaic modules and the risk of microcracks. Each component of this application can be produced and processed in a standardized factory, ensuring the quality of each component of the four-sided pyramid frame is effectively guaranteed. The parts are dimensionally accurate and the component strength is uniform, which can greatly improve the overall assembly effect and stress performance of the four-sided pyramid frame, facilitate rapid on-site assembly, greatly reduce on-site welding and fastening work, shorten the construction cycle, and avoid material waste caused by material errors. It has very high economic efficiency. At the same time, the modular design allows for the replacement of local components at any time, reducing later maintenance costs.

[0038] Reference Figure 2 , Figure 5 and Figure 6The quadrangular pyramid base 8 includes a base plate 81 and a pair of side ribs 82. The base plate 81 is located on the side wall of the vertical square oblique tube 4. The pair of side ribs 82 are symmetrically arranged on the side wall of the base plate 81. A first through hole 821 is opened on one side of each pair of side ribs 82, and a second through hole 822 is opened on the other side of each pair of side ribs 82. A suspension hole 1011 is opened at the end of the side wall of the pair of horizontal square tubes 101 away from the fixed plate 13. A steel wire rope 12 is arranged between the suspension hole 1011 on one of the adjacent quadrangular pyramid frames and the second through hole 822 on the other adjacent quadrangular pyramid frame. A row of triangular support rods 11 is arranged between the first through hole 821 on one of the adjacent quadrangular pyramid frames and the fixed plate 13 on the other adjacent quadrangular pyramid frame. This design facilitates the installation of the steel wire rope 12 and the row of triangular support rods 11. The base plate 81 and the side ribs 82 are welded together by a bevel weld.

[0039] Reference Figure 1 , Figure 3 and Figure 4 A pair of first rope clips 6 are symmetrically arranged on the horizontal square tubes 101 of a pair of horizontal square tube prefabricated components 1. A component cable 61 perpendicular to the horizontal square tube 101 passes through the first rope clip 6 on the adjacent horizontal square tubes 101. This design uses the component cable 61 to pass through the first rope clip 6.

[0040] Reference Figure 7 and Figure 8 A pair of second rope clips 9 are provided at the bottom of the base plate 81. A stabilizing cable 5 passes through the second rope clips 9. This design is achieved by using the stabilizing cable 5 to pass through the second rope clips 9.

[0041] The module cable 61 is used to support the photovoltaic modules. The photovoltaic modules are laid on the module cable 61 (generally 30-50m per span) and then fixed to the module cable 61 by clips. The stabilizing cable 5 provides support to the module cable by supporting the four-sided pyramid. Therefore, the module cable 61 and the stabilizing cable 5 can form a spatial triangular shuttle structure. At the same time, combined with the inter-row triangular support rods 11 and steel wire ropes 12, multiple rows of photovoltaic modules are connected into a whole to jointly resist external loads such as wind, thereby further improving the overall spatial rigidity and wind resistance of the photovoltaic array.

[0042] Reference Figure 8 and Figure 12 Both the first rope clamp 6 and the second rope clamp 9 are provided with fixing components; the fixing components include a pair of threaded posts symmetrically arranged on the first rope clamp 6 or the second rope clamp 9, and a fixing nut is provided on each pair of threaded posts. The pair of threaded posts penetrate the transverse square tube 101 or the four-sided pyramid base 8. This design facilitates the installation of the first rope clamp 6 and the second rope clamp 9 by setting threaded posts on the first rope clamp 6 and the second rope clamp 9 and cooperating with fixing nuts.

[0043] Reference Figure 9 and Figure 12 Mounting bolts 10 are provided between the longitudinal square tube 2 and the U-shaped connecting plate 102, between the longitudinal square tube 2 and the mounting plate 3, between the vertical square oblique tube 4 and the mounting plate 3, between the quadrangular pyramid base 8 and the vertical square oblique tube 4, between the connecting plate 103 and the horizontal square oblique tube 7, and between the row triangular support rod 11 and the quadrangular pyramid base 8 and the fixing plate 13, respectively. Mounting bolts 10 are provided with mounting nuts. This design facilitates the assembly of the components of the quadrangular pyramid frame by using mounting bolts 10 and mounting nuts. Through holes matching the mounting bolts 10 are opened on the longitudinal square tube 2, the mounting plate 3, the vertical square oblique tube 4, the horizontal square oblique tube 7, the fixing plate 13, the connecting plate 103, the U-shaped connecting plate 102, and the row triangular support rod 11, thereby facilitating the installation of the mounting bolts 10 and enabling rapid on-site assembly.

[0044] Reference Figure 1 and Figure 12 The connecting plates 103 on the pair of transverse square tube prefabricated components 1 are diagonally distributed. This design facilitates dividing the rectangle formed by the pair of transverse square tube prefabricated components 1 and the pair of longitudinal square tubes 2 into a triangle by connecting plates 103, thereby making the structure itself stable and reliable.

[0045] Reference Figures 1-12 As an embodiment of this utility model: Workers use mounting bolts 10 and mounting nuts to splice and fix the longitudinal square tube 2 and U-shaped connecting plate 102, the longitudinal square tube 2 and mounting plate 3, the vertical square oblique tube 4 and mounting plate 3, the square pyramid base 8 and vertical square oblique tube 4, the connecting plate 103 and horizontal square oblique tube 7, and the inter-row triangular support rod 11 to the square pyramid base 8 and fixing plate 13 respectively. The steel wire rope 12 is suspended between the suspension hole 1011 on one of the adjacent square pyramid frames and the second through hole 822 on the other adjacent square pyramid frame. The component cable 61 passes through the first rope clamp 6, and the stabilizing cable 5 passes through the second rope clamp 9, completing the assembly of the quadrangular pyramid frame and the components between the quadrangular pyramid frames. Each component of this application can be produced and processed in a standardized factory, ensuring that the quality of each component of the quadrangular pyramid frame is effectively guaranteed, the parts are dimensionally accurate, and the component strength is uniform. This can greatly improve the overall assembly effect and stress performance of the quadrangular pyramid frame, facilitate rapid on-site assembly, greatly reduce on-site welding and fastening work, shorten the construction cycle, and avoid material waste caused by material errors. It has very high economic efficiency. At the same time, the modular design allows for the replacement of local components at any time, reducing later maintenance costs.

[0046] By using a four-sided pyramid frame as a spatial pentahedron, each plane is a stable triangle, ensuring the structure's inherent stability and reliability. Adjacent four-sided pyramid frames are reliably connected by rows of triangular support rods 11 and steel wire ropes 12, combining rigidity and flexibility. This greatly enhances the overall spatial rigidity and wind resistance of the four-sided pyramid frame, while also absorbing wind vibration energy, ensuring the stable operation of photovoltaic modules in harsh wind environments. The use of flexible connection technology reduces the impact of wind vibration on photovoltaic modules and the risk of hidden cracks, thus improving the practicality of this invention.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wind-resistant and stable structure for a modular, four-sided pyramidal flexible photovoltaic support, characterized in that, include: The four-sided pyramid frame includes a pair of transverse square tube prefabricated components (1), a longitudinal square tube (2), a mounting plate (3), a vertical square oblique tube (4), a horizontal square oblique tube (7), a fixing plate (13), and a four-sided pyramid base (8); The prefabricated component (1) of the horizontal square tube includes a horizontal square tube (101), a pair of U-shaped connecting plates (102) are symmetrically arranged at the bottom of the horizontal square tube (101), and a pair of connecting plates (103) are symmetrically arranged at the top and bottom of the horizontal square tube (101) and placed between the pair of U-shaped connecting plates (102). A pair of longitudinal square tubes (2) are provided between the U-shaped connecting plates (102) of a pair of transverse square tube prefabricated components (1), a pair of mounting plates (3) are provided on the side walls of each pair of longitudinal square tubes (2), a vertical square oblique tube (4) is provided between each pair of mounting plates (3), a quadrangular pyramid base (8) is provided on the side wall of the vertical square oblique tube (4), a horizontal square oblique tube (7) is provided between the connecting plates (103) of a pair of transverse square tube prefabricated components (1), and a fixing plate (13) is provided at the end of the side wall of each pair of transverse square tubes (101). At least two quadrangular pyramid frames are provided. A steel wire rope (12) is provided between the horizontal square tube (101) on one of the adjacent quadrangular pyramid frames and the quadrangular pyramid base (8) on the other adjacent quadrangular pyramid frame. A row of triangular support rods (11) is provided between the quadrangular pyramid base (8) on one of the adjacent quadrangular pyramid frames and the fixing plate (13) on the other adjacent quadrangular pyramid frame.

2. The wind-resistant and stable structure of the assembled four-sided pyramidal flexible photovoltaic support according to claim 1, characterized in that, The quadrangular pyramid base (8) includes a base plate (81) and a pair of side ribs (82). The base plate (81) is disposed on the side wall of the vertical square oblique tube (4). The pair of side ribs (82) are symmetrically disposed on the side wall of the base plate (81). A first through hole (821) is provided on one side of each pair of side ribs (82), and a second through hole (822) is provided on the other side of each pair of side ribs (82). A suspension hole (1011) is provided at the end of the side wall of the pair of horizontal square tubes (101) away from the fixed plate (13). The wire rope (12) is disposed between the suspension hole (1011) on one of the adjacent quadrangular pyramid frames and the second through hole (822) on the other adjacent quadrangular pyramid frame. The row-to-row triangular support rod (11) is disposed between the first through hole (821) on one of the adjacent quadrangular pyramid frames and the fixed plate (13) on the other adjacent quadrangular pyramid frame.

3. The wind-resistant and stable structure of the assembled four-sided pyramidal flexible photovoltaic support according to claim 2, characterized in that, A pair of first rope clips (6) are symmetrically arranged on the horizontal square tubes (101) of the pair of horizontal square tube prefabricated components (1). A component cable (61) perpendicular to the horizontal square tube (101) passes through the first rope clip (6) on the adjacent horizontal square tubes (101). The component cable (61) is used to support the photovoltaic module.

4. The wind-resistant and stable structure of the assembled four-sided pyramidal flexible photovoltaic support according to claim 3, characterized in that, A pair of second rope clips (9) are provided at the bottom of the base plate (81). A stabilizing cable (5) passes through the second rope clips (9). The stabilizing cable (5) is used to provide support for the component cable (61), and the stabilizing cable (5) and the component cable (61) form a spatial triangular prism structure.

5. The wind-resistant and stable structure of the assembled quadrangular pyramidal flexible photovoltaic support according to claim 4, characterized in that, Both the first rope clip (6) and the second rope clip (9) are provided with fixing components; The fixing component includes a pair of threaded posts symmetrically arranged on the first rope clamp (6) or the second rope clamp (9), each of the threaded posts being provided with a fixing nut, and the pair of threaded posts penetrating the transverse square tube (101) or the four-sided pyramidal base (8).

6. The wind-resistant and stable structure of the assembled four-sided pyramidal flexible photovoltaic support according to claim 1, characterized in that, Mounting bolts (10) are provided between the longitudinal square tube (2) and the U-shaped connecting plate (102), between the longitudinal square tube (2) and the mounting plate (3), between the vertical square oblique tube (4) and the mounting plate (3), between the square pyramid base (8) and the vertical square oblique tube (4), between the connecting plate (103) and the horizontal square oblique tube (7), and between the row triangular support rod (11) and the square pyramid base (8) and the fixing plate (13), respectively. Mounting nuts are provided on the mounting bolts (10).

7. The wind-resistant and stable structure of the assembled four-sided pyramidal flexible photovoltaic support according to claim 1, characterized in that, The connecting plates (103) on the pair of transverse square tube prefabricated components (1) are diagonally distributed.

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