Photovoltaic module support

Abstract

The utility model relates to a photovoltaic module support which comprises a first support assembly and a second support assembly, the first support assembly is used for being arranged on a first slope, and the end, away from a ridge, of the first support assembly is used for being fixedly connected with a house or the ground; the second support assembly is arranged on a second slope, the end, away from the ridge, of the second support assembly is fixedly connected with a house or the ground, and the end, close to the ridge, of the first support assembly is connected with the end, close to the ridge, of the second support assembly. The first support assembly and the second support assembly are respectively provided with a photovoltaic assembly, and the first support assembly is used for changing the inclination angle of the photovoltaic assembly located on the first support assembly. Namely, the first support assembly does not need to be fixedly connected with the first slope, and the second support assembly does not need to be fixedly connected with the second slope, thereby preventing the photovoltaic assembly support from damaging the roof when the photovoltaic assembly is installed.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module installation technology, and in particular to photovoltaic module mounting brackets. Background Technology

[0002] With the rapid installation of photovoltaic power stations, fewer and fewer roofs are suitable for installation. The double-slope installation scheme for sloping roofs is gradually adapting to market demand. Traditional double-slope sloping roofs have relatively low power generation on the north slope. In order to increase the power generation on the north slope, a type of double-slope sloping roof support with an increased north slope angle is gradually gaining attention.

[0003] In related technologies, a support frame is typically installed directly on the north-facing roof. The support frame is connected to the roof using expansion bolts, and the photovoltaic modules are mounted on the support frame. The tilt angle of the photovoltaic modules on the north-facing roof is adjusted by adjusting the height difference between the support frame and the ridge.

[0004] However, since the bottom of the support frame is usually fixed to the north-facing roof with expansion bolts, it can damage the roof and easily lead to roof leaks. Utility Model Content

[0005] Therefore, it is necessary to provide a photovoltaic module support system to address the issue of damage to the roof when changing the slope of a north-facing roof.

[0006] A photovoltaic module support for mounting on a sloping roof having a ridge, one side of which is a first slope and the other side of which is a second slope, the photovoltaic module support comprising:

[0007] A first support assembly is used to be installed on the first slope, and the end of the first support assembly away from the ridge is used to be fixedly connected to the house or the ground;

[0008] The second support assembly is used to be installed on the second slope, and the end of the second support assembly away from the ridge is used to be fixedly connected to the house or the ground. The end of the first support assembly near the ridge is connected to the end of the second support assembly near the ridge.

[0009] The first support assembly and the second support assembly are respectively used to install photovoltaic modules, and the first support assembly is used to change the tilt angle of the photovoltaic module located on the first support assembly.

[0010] In one embodiment, the first support assembly includes a first leveling structure and a first supporting structure. The first leveling structure has a first supporting plane, and the first supporting structure is disposed on the first supporting plane. The first supporting structure is used to mount the photovoltaic module.

[0011] In one embodiment, the end of the first leveling structure near the ridge is connected to the second support assembly, and the end of the first leveling structure away from the ridge is fixedly connected to the house or the ground.

[0012] In one embodiment, the first leveling structure includes a leveling beam and a plurality of first support members disposed at the bottom of the leveling beam. The first support member includes an upright and a horizontal bar perpendicular to the upright. One end of the upright is connected to the leveling beam, and the other end is disposed on the first slope through the horizontal bar.

[0013] In one embodiment, there are multiple leveling beams, which are arranged sequentially along the length of the ridge, and the side of the multiple leveling beams away from the first support member forms a first support plane.

[0014] The first leveling structure includes connectors, and multiple leveling beams are connected through the connectors.

[0015] In one embodiment, the connector is parallel to the ridge, and along the length of the connector, two adjacent leveling beams at the first end are connected by a figure-eight brace, and two adjacent leveling beams at the last end are connected by a figure-eight brace.

[0016] In one embodiment, the first support structure includes a first base frame and a plurality of web members. The end of the first base frame near the ridge is connected to the first leveling structure, and the end of the first base frame away from the ridge is spaced apart from the first leveling structure. The plurality of web members are arranged sequentially between the first base frame and the first leveling structure along the slope direction of the first slope, and two adjacent web members form a figure-eight structure.

[0017] In one embodiment, a first platform is provided on the side of the first slope away from the ridge; the first support assembly includes a first column fixed on the first platform, and the first leveling structure and the end of the first base frame away from the ridge are respectively fixedly connected to the first column.

[0018] In one embodiment, there are multiple first columns, which are arranged sequentially along the length of the roof ridge. Adjacent first columns are connected by diagonal braces, which are inclined to the first columns.

[0019] In one embodiment, the second support assembly includes a second base frame and a plurality of second support members disposed at the bottom of the second base frame. The end of the second support member away from the second base frame is located on the second slope. The end of the second base frame near the ridge is connected to the first support assembly. The end of the second base frame away from the ridge is fixedly connected to a second column, which is used for fixed connection to the house or the ground.

[0020] In the aforementioned photovoltaic module support system, one end of the first support assembly and the second support assembly are connected. The end of the first support assembly furthest from the second support assembly is fixed to the building or the ground, and the end of the second support assembly furthest from the first support assembly is also fixed to the building or the ground. This allows the first and second support assemblies to be stably fixed to the sloping roof, thereby improving the stability of the photovoltaic module support system. Simultaneously, the first support assembly does not need to be fixedly connected to the first slope, and the second support assembly does not need to be fixedly connected to the second slope, thus preventing the photovoltaic module support system from damaging the roof during installation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of a photovoltaic module support along the length of the roof ridge in one embodiment.

[0022] Figure 2 This is a schematic diagram of the first leveling structure along the slope direction of the first slope in one embodiment.

[0023] Figure 3 This is a schematic diagram of the connection structure between multiple first columns along the length of the roof ridge in one embodiment.

[0024] Figure 4 A schematic diagram of the structure at point A in the middle.

[0025] Figure 5 A schematic diagram of the structure at point B.

[0026] Reference numerals: 10, First slope; 20, Second slope; 30, Ridge; 40, First platform; 50, Second platform; 100, First support assembly; 110, First leveling structure; 111, Leveling beam; 112, First support member; 1121, Horizontal bar; 1122, Vertical bar; 113, Connector; 114, V-brace; 120, First support structure; 121, First base frame; 122, Web member; 140, First column; 141, Diagonal tie rod; 200, Second support assembly; 212, Second support member; 240, Second column; 260, Second base frame; 300, Photovoltaic module; 310, Guide rail; 320, Waterproof layer. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See Figure 1 This application provides a photovoltaic module 300 bracket, which is used to install on a sloping roof. The sloping roof has a ridge 30, one side of which is a first slope 10, and the other side is a second slope 20. The photovoltaic module 300 bracket includes a first bracket assembly 100 and a second bracket assembly 200. The first bracket assembly 100 is installed on the first slope 10, and the end of the first bracket assembly 100 away from the ridge 30 is fixedly connected to the building or the ground. The second bracket assembly 200 is installed on the second slope 20, and the end of the second bracket assembly 200 away from the ridge 30 is fixedly connected to the building or the ground. The end of the first bracket assembly 100 near the ridge 30 is connected to the end of the second bracket assembly 200 near the ridge 30. Photovoltaic modules 300 are respectively installed on the first bracket assembly 100 and the second bracket assembly 200. The first bracket assembly 100 is used to change the tilt angle of the photovoltaic modules 300 located on the first bracket assembly 100.

[0034] The sloping roof includes a first slope 10 and a second slope 20, with the tops of the first slope 10 and the second slope 20 connected to form a ridge 30. The first slope 10 can be a north-facing slope, and the second slope 20 can be a south-facing slope. In practical use, due to the larger tilt angle of the north-facing slope, the power generation on the north-facing slope is lower. Furthermore, the photovoltaic modules 300 on the north-facing slope are prone to glare, affecting neighbors. Therefore, by setting up a first support assembly 100, the tilt angle of the photovoltaic modules 300 on the first support assembly 100 can be different from the tilt angle of the north-facing slope. This changes the tilt angle of the photovoltaic modules 300 on the north-facing slope, thereby increasing the power generation of the photovoltaic modules 300 on the north-facing slope and reducing the glare effect.

[0035] In this embodiment, one end of the first support assembly 100 and the second support assembly 200 are connected. The end of the first support assembly 100 away from the second support assembly 200 is fixed to the building or the ground, and the end of the second support assembly 200 away from the first support assembly 100 is also fixed to the building or the ground. This allows the first support assembly 100 and the second support assembly 200 to be stably fixed on the sloping roof, thereby improving the stability of the photovoltaic module support. Simultaneously, the first support assembly 100 does not need to be fixedly connected to the first slope 10, and the second support assembly 200 does not need to be fixedly connected to the second slope 20, thus preventing the photovoltaic module 300 support from damaging the roof during installation.

[0036] In some embodiments, the first support assembly 100 includes a first leveling structure 110 and a first support structure 120. The first leveling structure 110 has a first support plane, and the first support structure 120 is disposed on the first support plane. A photovoltaic module 300 is disposed on the first support structure 120.

[0037] In this embodiment, since the roof is generally covered with tiles, the surface of the first slope 10 is uneven. A first leveling structure 110 is provided. The first leveling structure 110 has a first supporting plane. The first supporting structure 120 is disposed on the first supporting plane. That is, the first leveling structure 110 is used to provide a first supporting plane for the first supporting structure 120, so as to facilitate the stable fixing of the first supporting structure 120 on the first supporting plane.

[0038] In some embodiments, the end of the first leveling structure 110 near the ridge 30 is connected to the second support assembly 200, and the end of the first leveling structure 110 away from the ridge 30 is fixedly connected to the first platform 40.

[0039] That is, the first leveling structure 110 is used to provide a stable plane for the first support structure 120, and at the same time, it realizes the connection between the first support structure 120 and the roof.

[0040] In some other embodiments, the end of the first support structure 120 near the ridge 30 may be connected to the second bracket assembly 200, and the end of the first support structure 120 away from the ridge 30 may be fixedly connected to the first platform 40.

[0041] In some embodiments, combined with Figure 4 The first leveling structure 110 includes a leveling beam 111 and a plurality of first support members 112 disposed at the bottom of the leveling beam 111. The first support member 112 includes a vertical pole 1122 and a horizontal bar 1121 perpendicular to the vertical pole 1122. One end of the vertical pole 1122 is connected to the leveling beam 111, and the other end is disposed on the first slope 10 through the horizontal bar 1121.

[0042] In this embodiment, the crossbar 1121 is used to increase the contact area between the bottom of the upright 1122 and the tiles on the first slope 10, thereby improving the stability of the first support member 112. The crossbar 1121 can be connected to the upright 1122 by screws or welding. Multiple first support members 112 enable the leveling beam 111 to be stably supported on the first slope 10, while also ensuring that the surface of the first leveling beam 111 away from the first support member 112 forms the first support plane. A waterproof layer 320 is laid on the tiles, and the crossbar 1121 is positioned on the waterproof layer 320. The waterproof layer 320 is used to prevent roof leaks caused by damaged tiles.

[0043] Furthermore, in combination Figure 2 There are multiple leveling beams 111, which are arranged sequentially along the length of the ridge 30. The side of the multiple leveling beams 111 away from the first support member 112 forms a first support plane. The first leveling structure 110 includes a connector 113, and the multiple leveling beams 111 are connected by the connector 113.

[0044] In this embodiment, each leveling beam 111 is supported on the first slope 10 by multiple first support members 112. The stability of the leveling beam 111 can be ensured by using first support members 112 of different heights. Furthermore, the connector 113 can connect multiple leveling beams 111 into a whole, further improving the stability of the first leveling structure 110.

[0045] Specifically, the connector 113 is parallel to the ridge 30. Along the length of the connector 113, two adjacent leveling beams 111 at the beginning are connected by a figure-eight brace 114, and two adjacent leveling beams 111 at the end are connected by a figure-eight brace 114.

[0046] In some embodiments, the connector 113 is a long rod, and the middle portion of each leveling beam 111 is simultaneously connected to the connector 113. The figure-eight brace 114 includes two ribs forming a figure-eight structure, with the two ribs located on both sides of the connector 113. The beginning and end are connected by the figure-eight brace 114 to further improve the stability of the first leveling structure 110 and enhance the support strength for the first support structure 120 and the photovoltaic module 300.

[0047] In other embodiments, the connector 113 can also be multiple short rods, with at least two leveling beams 111 connected simultaneously by a short rod. That is, multiple short rods can also connect multiple leveling beams 111 simultaneously. The first and last ends are connected by V-braces 114 to further improve the stability of the first leveling structure 110.

[0048] In some embodiments, combined with Figure 1 Along the slope direction of the first slope 10, the thickness of the first support structure 120 increases sequentially.

[0049] In this embodiment, the thickness of the first support structure 120 increases sequentially along the slope direction of the first slope 10, thereby reducing the slope of the north slope.

[0050] In some embodiments, combined with Figure 1 The first support structure 120 includes a first base frame 121 and a plurality of web members 122. The end of the first base frame 121 near the ridge 30 is connected to the first leveling structure 110, and the end of the first base frame 121 away from the ridge 30 is spaced apart from the first leveling structure 110. The plurality of web members 122 are arranged sequentially between the first base frame 121 and the first leveling structure 110 along the slope direction of the first slope 10, and two adjacent web members 122 form a figure-eight structure.

[0051] Furthermore, the end of the first base frame 121 near the ridge 30 is connected to the first leveling beam 111, and the end of the first base frame 121 away from the ridge 30 is spaced apart from the first leveling beam 111, so that the thickness of the first support structure 120 increases sequentially along the slope direction of the first slope 10. A web member 122 is provided between the first base frame 121 and the first leveling beam 111, and two adjacent web members 122 form a V-shaped structure, that is, two adjacent web members 122 can form a triangular structure with the first base frame 121 or the first leveling beam 111, which is used to improve the stability of the first support structure 120.

[0052] Specifically, along the slope direction of the first slope 10, the length of the web member 122 increases sequentially for the smaller slope of the north slope.

[0053] In some embodiments, a first platform 40 is provided on the side of the first slope 10 away from the ridge 30, and a second platform 50 is provided on the side of the second slope 20 away from the ridge 30. The first platform 40 is located on the side of the first slope 10 away from the second slope 20, and the second platform 50 is located on the side of the second slope 20 away from the first slope 10. The first support assembly 100 includes a first column 140 fixed to the first platform 40, and the ends of the first leveling structure 110 and the first base frame 121 away from the ridge 30 are respectively fixedly connected to the first column 140. The first column 140 is fixed to the first platform 40 by expansion screws.

[0054] In this embodiment, one end of the first leveling beam 111 is fixedly connected to the second support assembly 200, and the other end is fixedly connected to the first column 140, thereby enabling the fixed connection of the first leveling beam 111 and facilitating the placement of the first support structure 120 on the first leveling beam 111.

[0055] In some embodiments, combined with Figure 3 There are multiple first columns 140, which are arranged sequentially along the length of the ridge 30. Adjacent columns are connected by diagonal bracing 141, which is inclined to the first column 140.

[0056] In this embodiment, the diagonal tie rod 141 is used to connect two adjacent first columns 140, thereby strengthening the fixation of all first columns 140 and improving the stability of the entire first support assembly 100.

[0057] In other embodiments, there is no need to set up the first platform 40 and the second platform 50. In this case, the bottom of the first column 140 can be directly fixed to the ground; or the bottom of the first column 140 can be fixed to the outer wall of the house through a triangular bracket.

[0058] In some embodiments, the first slope 10 is a north slope, and the tilt angle of the photovoltaic module 300 located on the first support assembly 100 is greater than 0° and less than or equal to 15°. For example, the tilt angle of the photovoltaic module 300 can be any integer within the range of 1 degree to 15 degrees.

[0059] In this embodiment, the first slope 10 is the north slope. When the tilt angle of the photovoltaic module 300 on the north slope is raised to 0 degrees, the theoretical power generation of the photovoltaic module 300 on the north slope is the highest. However, when the tilt angle of the photovoltaic module 300 is 0 degrees, there is dust accumulation on the surface of the photovoltaic module 300 and the drainage and dust removal are difficult, which will lead to a reduction in the actual power generation. Therefore, after the photovoltaic module 300 is installed on the first support assembly 100, the tilt angle of the photovoltaic module 300 on the first support assembly 100 is greater than 0° and less than or equal to 5°, that is, to ensure that the power generation of the photovoltaic module 300 on the north slope is close to the theoretical maximum power generation.

[0060] In some embodiments, the second support assembly 200 includes a second column 240, a second base frame 260, and a plurality of second support members 212 disposed at the bottom of the second base frame 260. One end of each second support member 212, away from the second base frame 260, is located on the second slope 20. The end of the second base frame 260 near the ridge 30 is connected to the first support assembly 100. The end of the second base frame 260 away from the ridge 30 is fixedly connected to the second column 240, and the second column 240 is fixedly connected to the building or the ground. The second column 240 is fixed to the second platform 50 using expansion bolts.

[0061] Combination Figure 5 The second support member 212 has the same structure as the first support member 112. The second support member 212 also includes a vertical pole 1122 and a horizontal bar 1121 perpendicular to the vertical pole 1122. One end of the vertical pole 1122 is connected to the second base frame 260, and the other end is set on the second slope 20 through the horizontal bar 1121. A waterproof layer 320 is laid on the tiles, and the horizontal bar 1121 is set on the waterproof layer 320.

[0062] Furthermore, the support height of the second support member 212 on the second base frame 260 can be changed by altering the height of the second support member 212, thereby changing the slope of the south slope. However, the second support members 212 at different heights are only used to change the slope within a first range, such as the south slope. If they are used directly when the slope needs to be changed over a larger range, the support strength will be poor. Therefore, when changing the slope of the north slope, the first leveling structure 110 is combined with the first support structure 120. The slope of the north slope is changed through the first support structure 120, which is a truss structure and has a stabilizing support function.

[0063] Of course, when there is no second platform 50, the bottom of the second column 240 can be directly fixed to the ground; or the bottom of the second column 240 can be fixed to the outer wall of the house through a triangular bracket.

[0064] In some embodiments, combined with Figure 1 Guide rails 310 are respectively provided on the first base frame 121 and the second base frame 260, and the photovoltaic modules 300 are respectively mounted on the first base frame 121 and the second base frame 260 through the guide rails 310.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A photovoltaic module support structure, characterized in that, For installation on a sloping roof having a ridge, one side of the ridge being a first slope and the other side of the ridge being a second slope, the photovoltaic module support includes: A first support assembly is used to be installed on the first slope, and the end of the first support assembly away from the ridge is used to be fixedly connected to the house or the ground; The second support assembly is used to be installed on the second slope, and the end of the second support assembly away from the ridge is used to be fixedly connected to the house or the ground. The end of the first support assembly near the ridge is connected to the end of the second support assembly near the ridge. The first support assembly and the second support assembly are respectively used to install photovoltaic modules, and the first support assembly is used to change the tilt angle of the photovoltaic module located on the first support assembly.

2. The photovoltaic module support according to claim 1, characterized in that, The first bracket assembly includes a first leveling structure and a first supporting structure. The first leveling structure has a first supporting plane, and the first supporting structure is disposed on the first supporting plane. The first supporting structure is used to mount the photovoltaic module.

3. The photovoltaic module support according to claim 2, characterized in that, The end of the first leveling structure near the ridge is connected to the second support assembly, and the end of the first leveling structure away from the ridge is fixedly connected to the house or the ground.

4. The photovoltaic module support according to claim 2, characterized in that, The first leveling structure includes a leveling beam and a plurality of first support members disposed at the bottom of the leveling beam. The first support member includes an upright and a horizontal bar perpendicular to the upright. One end of the upright is connected to the leveling beam, and the other end is disposed on the first slope through the horizontal bar.

5. The photovoltaic module support according to claim 4, characterized in that, The number of leveling beams is multiple, and the multiple leveling beams are arranged sequentially along the length direction of the roof ridge. The side of the multiple leveling beams away from the first support member forms a first support plane. The first leveling structure includes connectors, and multiple leveling beams are connected through the connectors.

6. The photovoltaic module support according to claim 5, characterized in that, The connector is parallel to the ridge. Along the length of the connector, two adjacent leveling beams at the beginning are connected by a figure-eight brace, and two adjacent leveling beams at the end are connected by a figure-eight brace.

7. The photovoltaic module support according to claim 2, characterized in that, The first support structure includes a first base frame and multiple web members. The end of the first base frame near the ridge is connected to the first leveling structure, and the end of the first base frame away from the ridge is spaced apart from the first leveling structure. The multiple web members are arranged sequentially between the first base frame and the first leveling structure along the slope direction of the first slope, and two adjacent web members form a figure-eight structure.

8. The photovoltaic module support according to claim 7, characterized in that, A first platform is provided on the side of the first slope away from the roof ridge; The first support assembly includes a first column fixed to the first platform, and the first leveling structure and the end of the first base frame away from the ridge are respectively fixedly connected to the first column.

9. The photovoltaic module support according to claim 8, characterized in that, There are multiple first columns, which are arranged sequentially along the length of the roof ridge. Adjacent first columns are connected by diagonal braces, which are inclined to the first columns.

10. The photovoltaic module support according to claim 1, characterized in that, The second support assembly includes a second column, a second base frame, and a plurality of second support members disposed at the bottom of the second base frame. The end of the second support member away from the second base frame is located on the second slope. The end of the second base frame near the ridge is connected to the first support assembly. The end of the second base frame away from the ridge is fixedly connected to the second column, which is used to fix the structure to the house or the ground.

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