WO2022199060A1

WO2022199060A1 - Roofing back plate and roofing structure

Info

Publication number: WO2022199060A1
Application number: PCT/CN2021/131245
Authority: WO
Inventors: 周聪; 孟夏杰; 缪演平; 孔维; 梁欢迎; 盛昊
Original assignee: 隆基乐叶光伏科技有限公司
Priority date: 2021-03-24
Filing date: 2021-11-17
Publication date: 2022-09-29
Also published as: CN217630881U

Abstract

The present disclosure relates to the technical field of solar photovoltaics, and provides a roofing back plate and a roofing structure. The roofing back plate comprises a plurality of recessed portions and protruding portions formed by connecting side edges of adjacent recessed portions, wherein two opposite side edges of the roofing back plate in a transverse direction are provided with edge locking structures, and in the roofing back plate, the height of the protruding portions is greater than that of the edge locking structures arranged at the two opposite side edges; and at least one snap-fitting structure configured to be snap-fitted with a middle support is arranged at the bottom of each protruding portion. When a photovoltaic module is placed on the roofing back plate, since the tops of the protruding portions are the highest positions on the roofing back plate, the placement of the photovoltaic module is not limited by other structures on the roofing back plate, and the roofing back plate with unified standardized dimensions can be adapted to photovoltaic modules of any size, thereby reducing the production cost of photovoltaic modules. Moreover, each protruding portion of the roofing back plate is further connected to the middle support, thereby improving the wind uplift resistance of the roofing back plate.

Description

A roof back panel and roof structure

CROSS-REFERENCE TO RELATED APPLICATIONS

This disclosure claims the priority of a Chinese patent application with application number 202120602160.9 and titled "A Roof Backboard and Roof Structure" filed with the China Patent Office on March 24, 2021, the entire contents of which are incorporated by reference in this disclosure .

technical field

The present disclosure relates to the field of solar photovoltaic technology, and in particular, to a roof back sheet and a roof structure.

Background technique

In the implementation of photovoltaic power generation, in order to save installation space, photovoltaic modules are often chosen to be installed on the roof.

Generally speaking, during the construction process, the photovoltaic modules are directly covered on the outside of the roof, and the photovoltaic modules and the roof are combined together by gluing. Since the photovoltaic power generation system pursues the standardized design of the component size to reduce the cost, the width of the conventional photovoltaic module is about 1000mm, which is usually larger than the width of the traditional roof back sheet. Combined, traditional roof back panels are usually widened.

However, a wider roof back sheet means a larger wind-receiving area, which will lead to insufficient overall wind resistance of the roof. In addition, it is necessary to manufacture a corresponding size roof back sheet for different sizes of photovoltaic modules, which increases the production cost.

Overview

The present disclosure provides a roof back panel and a roof structure, aiming at solving the problems of poor wind resistance and high production cost when installing photovoltaic modules on the traditional roof back panel.

A first aspect of the embodiments of the present disclosure provides a roof backboard, including:

a plurality of concave parts, and a convex part formed by connecting the sides of adjacent said concave parts;

Two opposite sides of the roof back panel in the lateral direction are provided with a locking structure, and the locking structure is used to connect with the hook of the sliding support;

In the roof back panel, the height of the protruding portion is greater than the height of the seaming structures provided on the two opposite sides;

The bottom of the protruding portion is provided with at least one buckle structure, and the buckle structure is used to buckle with the intermediate support.

Optionally, the intermediate support includes a support body, and bending structures located on both sides of the support body, the bending structures are bent toward the center of the support body, and the buckle structure is The shape matches the shape of the bending structure.

Optionally, the edge locking structure includes a male rib and a female rib, the shape of the male rib matches the shape of the inner side of the hook, and the shape of the female rib matches the shape of the outer side of the hook; One side of the roof back plate is engaged with the inner side of the hook through the male rib, and the other side of the roof back plate is engaged with the outer side of the other hook through the female rib.

Optionally, the number of the concave portions is 2, and the top of the protruding portion is a planar structure, and the planar structure forms a bearing surface for bearing photovoltaic modules.

A second aspect of the embodiments of the present disclosure further provides a roof structure, the roof structure includes: a photovoltaic module, a sliding support, and a roof back plate; adjacent roof back plates are connected by a sliding support, and the roof back plate is connected by a sliding support. The locking structure on one side of the board is connected with the hook of one sliding support, and the locking structure on the other side of the roof back panel is connected with the hook of another adjacent sliding support; the middle support is connected with the The buckle structure of the roof back plate is fastened and connected with the purlin; the photovoltaic component is overlapped on the bearing surface of the roof back plate.

Optionally, a plurality of the roof backboards are overlapped to form a bearing structure, and one bearing structure carries one photovoltaic module.

Optionally, both sides of the intermediate support are provided with first fixing holes, and fasteners pass through the first fixing holes to fixedly connect the intermediate support and the purlin.

Optionally, the bottom of the sliding support is provided with a second fixing hole, and a fastener passes through the second fixing hole to fixedly connect the sliding support and the purlin.

In the embodiment of the present disclosure, the roof back panel includes a plurality of concave portions and a raised portion formed by connecting sides adjacent to the concave portions, and two opposite sides of the roof back panel in the lateral direction are provided with edge locking structures. In the roof back panel, the height of the protruding portion is greater than the height of the locking structures provided on the two opposite sides, and the bottom of the protruding portion is provided with at least one buckle structure. to snap into the middle support. Therefore, when the photovoltaic modules are placed on the above-mentioned roof backplane, the photovoltaic modules will only be in contact with the top of the raised part of the roof backplane, and since the top of the raised part is the highest position on the roof backplane, the placement of the photovoltaic modules It will not be limited by other structures on the roof backplane, and one or more roof backplanes can carry a photovoltaic module. Therefore, a unified standardized size roof backplane can be used to adapt to any size of photovoltaic modules, reducing the need for photovoltaic modules. It also reduces the production cost and does not need to increase the width of the roof back panel for installing photovoltaic modules, which avoids the reduction of the wind resistance due to the excessive width of the roof back panel. The support further improves the wind resistance of the roof back panel.

The above description is only an overview of the technical solutions of the present disclosure. In order to understand the technical means of the present disclosure more clearly, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present disclosure more obvious and easy to understand , the following specific embodiments of the present disclosure are given.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present disclosure more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. , for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 shows a schematic structural diagram of a roof back panel in an embodiment of the present disclosure;

FIG. 2 shows a schematic cross-sectional structure diagram of a roof back panel in an embodiment of the present disclosure;

FIG. 3 shows a schematic structural diagram of an intermediate support in an embodiment of the present disclosure;

FIG. 4 shows a schematic assembly diagram of a roof back panel and an intermediate support in an embodiment of the present disclosure;

FIG. 5 shows a schematic structural diagram of a sliding support in an embodiment of the present disclosure;

FIG. 6 shows an axial schematic view of a roof structure in an embodiment of the present disclosure;

FIG. 7 shows a schematic elevation view of a roof structure in an embodiment of the present disclosure.

Description of reference numbers:

10-Roof back panel, 11-Protrusion, 12-Depression, 13-Seam structure, 14-First side panel, 15-Second side panel, 16-Snap structure, 20-Intermediate support, 21 -Support body, 22-Bending structure, 23-First fixing hole, 30-Sliding support, 31-Hook, 32-Second fixing hole, 40-Photovoltaic module.

specific embodiment

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

Building Integrated Photovoltaic (BIPV, Building Integrated PV, PV is Photovoltaic) is a technology that integrates solar power modules (photovoltaic modules) into buildings. The building has photovoltaic power generation capability by bonding the photovoltaic modules and the roof back sheet on the exterior surface of the building together by means of gluing.

Referring to FIG. 1 , FIG. 1 shows a schematic structural diagram of a roof back panel in an embodiment of the present disclosure. The roof back panel includes a plurality of concave portions 12, and one or more raised portions 11 formed by connecting the sides of adjacent concave portions 12; the two opposite sides of the roof back panel in the lateral direction are provided with a locking structure 13. The edge locking structure 13 is used to connect with the hook of the sliding support.

The roof back panel may be produced by extruded metal plates or other manufacturing processes and materials, which are not specifically limited in this embodiment of the present disclosure. The shape of any cross section of the roof back panel is the same shape. Each roof back panel includes at least two concave parts 12 , the bottom end of each concave part 12 can be a plane structure, and two adjacent plane structures extend from opposite sides and connect to form a protrusion higher than the plane structure The protruding structure constitutes a protruding portion 11, and the upper surface of the protruding portion 11 can be used to carry objects, such as photovoltaic modules. In the above-mentioned plane structure, the side that is not adjacent to another plane structure extends in the direction away from the plane structure, and forms an overlock structure 13 higher than the plane structure, and the overlock structure 13 is used to connect a roof backboard with The other roof back panels are overlapped with each other. When the adjacent roof back panels are connected by the seam locking structure 13, the two roof back panels can be directly connected by the seam locking structure 13 of the two roof back panels, or by connecting the two roof back panels. The edge-locking structures 13 of the two roof backboards are connected to the same middle piece to achieve the effect of connecting two roof backboards. For example, the middle piece can be a hook of a sliding support.

The width and length of the above-mentioned roof backboard can be set to required dimensions according to actual requirements, which are not specifically limited in this embodiment of the present disclosure. The number of concave parts 12 is at least two, and the number of convex parts 11 is one less than the number of concave parts 12 . For example, when the number of concave parts 12 is three, the space between every two adjacent concave parts 12 If one raised portion 11 is formed, two raised portions 11 will be formed in total.

It should be noted that the above-mentioned concave portion 12, raised portion 11 and edge locking structure 13 may be independent components, and the roof back panel may be formed by welding or riveting, and the roof back panel may also be integrally manufactured by integral molding technology. .

Referring to Fig. 2, Fig. 2 shows a schematic cross-sectional structure diagram of a roof back panel in an embodiment of the present disclosure. In the roof back panel, the height of the raised portion 11 is greater than the height of the seaming structures 13 provided on the two opposite sides.

The concave direction of the concave part 12 of the roof back panel and the convex direction of the convex part 11 point to opposite directions. When the roof back plate is placed in such a way that the concave direction of the concave portion 12 points to the center of the earth, the highest point on the roof back plate is the top of the convex portion 11 , that is, the top of the convex portion 11 in FIG. 2 to the concave portion The vertical distance d1 at the bottom of 12 is greater than the vertical distances d2 and d3 from the top of the two edge-locking structures 13 to the bottom of the recessed part 12, and the position of the top of the raised part 11 is higher than the height of the edge-locking structures 13 on both sides of the roof back panel . In this way, when the flat structure object completely covering the roof back panel is placed horizontally above the roof back panel, the flat structure object only contacts the top of the raised part 11 on the roof back panel, and will not contact other structures on the roof back panel touch.

At least one buckling structure is also provided at the bottom of the raised portion of the roof back panel, and the buckling structure is used to buckle with the intermediate support.

The intermediate support can be fixedly connected to the purlin by means of fasteners or welding, and at least one buckle structure can be provided at the bottom of the raised portion of the roof back panel, so that the roof back panel and the intermediate support are mutually buckled. Furthermore, the raised portion of the intermediate support can be connected to the purlin through the intermediate support, which can significantly improve the wind resistance of the roof backboard.

Optionally, referring to FIG. 2 and FIG. 3 , FIG. 3 shows a schematic structural diagram of an intermediate support in an embodiment of the present disclosure. The bottom of the raised portion 11 of the roof back panel is provided with two buckling structures 16 opposite to each other, and the buckling structures 16 are used to buckle with both sides of the middle support.

As shown in FIG. 2 , for each raised portion 11 of the roof back panel, it may include a first side panel 14 and a second side panel 15 connecting the bottom of the recessed portion 12 and the top of the raised portion 11 . 14 and the end of the second side plate 15 close to the bottom of the recessed part 12, the first side plate 14 is bent toward the direction of the second side plate 15 and forms a protruding structure, the protruding structure forms a buckle structure 16, the second The side panel 15 is bent toward the direction of the first side panel 14 and forms a protruding structure, and the protruding structure forms another fastening structure 16, and the fastening structure 16 is used for fastening the roof back panel to the intermediate support. .

The bottom of each raised portion 11 on the roof back plate is provided with a buckle structure 16. When the roof back plate is installed on the surface of the house, the buckle structure 16 and the intermediate support arranged on the surface of the house are mutually buckled. , which can make the connection between the roof back panel and the house surface more firmly, and help to improve the wind resistance of the roof back panel.

Optionally, referring to FIG. 3 and FIG. 4 , FIG. 4 shows a schematic assembly diagram of a roof back panel and an intermediate support in an embodiment of the present disclosure. The intermediate support includes a support body 21 and bending structures 22 located on both sides of the support body 21 , and the bending structures 22 are bent toward the center of the support body 21 . The shape of the fastening structure on the roof back panel matches the shape of the bending structure 22 .

As shown in FIG. 3 , both sides of the support body 21 of the intermediate support are connected with bending structures 22 respectively. The two bending structures 22 are located on the same side of the intermediate support. One end of the bending structure 22 is connected to the support body 21 . One end of each bending structure 22 is fixedly connected, and the middle part of each bending structure 22 is bent toward the center of the surface of the support body 21. Each bending structure 22 is also provided with at least one first through hole, the first through hole For fixing the intermediate support with other structures, for example, the intermediate support is installed on the purlin by passing the screw through the above-mentioned first through hole. The support body 21 can be connected with the bending structure 22 by welding, riveting, etc. to form an intermediate support, and the intermediate support can also be produced by an integral molding technology, which is not specifically limited in the embodiment of the present disclosure.

As shown in FIG. 4 , the bending structures on both sides of the intermediate support 20 correspond to the buckling structures disposed opposite to the bottom of the raised portion. Specifically, the shape of the inner side of the folded structure and the shape of the outer side of the buckling structure match each other. During assembly, the roof back panel 10 is moved toward the intermediate support 20 along the x direction shown in FIG. 4 , so that the bending structure and the fastening structure are fastened to each other, and the assembly is completed.

It should be noted that, due to the limited size of the intermediate supports, one intermediate support usually cannot completely fill all the snap-fit structures, so each protrusion can be assembled with multiple intermediate supports to improve the stability of the structure.

In the above assembly method, the contact surface between the intermediate support and the roof back panel is the inner surface of the entire bending structure, so the contact area of the connection position between the intermediate support and the roof back panel is large, and the roof back panel is subjected to When the external force is large, the connection position between the roof back panel and the intermediate support is not easily deformed, which effectively improves the wind resistance of the roof back panel.

Optionally, referring to FIG. 2 and FIG. 5 , FIG. 5 shows a schematic structural diagram of a sliding support in an embodiment of the present disclosure. The edge locking structure 13 includes male ribs and female ribs, the shape of the male ribs matches the shape of the inner side of the hook 31, and the shape of the female rib matches the shape of the outer side of the hook 31; The inner side of the hook 31 is engaged, and the other side of the roof back plate is engaged with the outer side of another hook 31 through the female rib.

Both sides of the roof back panel are provided with a side-locking structure 13, that is to say, each roof back panel includes two side-locking structures 13. Among the two side-locking structures 13, one of the side-locking structures 13 is a male rib. Another edge-locking structure 13 is a female rib. The shape of the male rib matches the shape of the inner side of the hook 31 , and the shape of the female rib matches the shape of the outer side of the hook 31 . During assembly, the male rib of one roof back panel is placed on the inner side of the hook 31, and the female rib of the other roof back panel wraps the hook 31 from the outside of the hook 31, so that the seam structures 13 of the two roof back panels overlap each other. , to complete the assembly between the two roof back panels.

Optionally, referring to FIG. 2 , the number of the concave parts 12 is 2, the top of the convex part 11 is a plane structure, and the plane structure forms a bearing surface for supporting photovoltaic modules.

Each roof back panel in the embodiment of the present disclosure may include two concave parts 12 and one convex part 11 between the two concave parts 12 . The top of the raised portion 11 is a plane structure, and the plane structure forms a bearing surface, which is used to support the backside of the photovoltaic module to support the photovoltaic module. Ensure that the contact area is large, which helps to better carry photovoltaic modules.

In the embodiment of the present disclosure, the roof back panel includes a plurality of concave portions and a raised portion formed by connecting the sides of adjacent concave portions, and two opposite sides of the roof back panel in the lateral direction are provided with edge locking structures. In the board, the height of the raised portion is greater than the height of the edge locking structures provided on the two opposite sides. When the photovoltaic modules are placed on the above-mentioned roof backplane, the photovoltaic modules will only contact the top of the raised part of the roof backplane, while the other positions of the photovoltaic modules are in a suspended state, which is conducive to the circulation of the air under the photovoltaic modules, which can make Photovoltaic modules obtain better heat dissipation effect, and due to the highest position on the roof backplane at the top of the raised part, the placement of photovoltaic modules will not be restricted by other structures on the roof backplane, which can be composed of one or more roof backplanes. It carries one photovoltaic module, so the uniform standardized size of the roof backplane can be adapted to any size of photovoltaic modules, which reduces the production cost of photovoltaic modules, and does not need to increase the width of the roof backplane for the installation of photovoltaic modules, avoiding the need for roofing. The back panel is too wide, which reduces its wind resistance. In addition, there is no structure higher than the upper surface of the photovoltaic modules on the roof backplane, so the roof backplane will not cast shadows on the photovoltaic modules, so that the photovoltaic modules can obtain more sufficient light, which helps to improve the power generation of the photovoltaic modules. quantity.

Referring to FIG. 6 , an embodiment of the present disclosure further provides a roof structure. FIG. 6 shows an axial schematic view of a roof structure in an embodiment of the present disclosure. The roof structure includes: a photovoltaic module 40 , a sliding support 30 and the aforementioned The roof back panel 10.

The roof structure includes at least one roof back panel 10 , and when the roof structure includes a plurality of roof back panels 10 , the roof structure further includes at least one sliding support 30 . The roof structure may further include a photovoltaic module 40 arranged on the top, so that the roof structure has a photovoltaic power generation function.

Referring to FIG. 7 , FIG. 7 shows a schematic elevation view of a roof structure in an embodiment of the present disclosure. Adjacent roof back panels 10 are connected by sliding supports 30 , and the seam structure on one side of the roof back panels 10 is connected to The hooks of one sliding support 30 are connected, and the locking structure on the other side of the roof back panel 10 is connected to the hook of another adjacent sliding support 30; the photovoltaic module 40 is overlapped on the bearing surface of the roof back panel 10 .

Generally speaking, the roof structure consists of multiple roof backing panels to cover the entire roof. One or more sliding supports are arranged between adjacent roof backboards, each sliding support is provided with a hook, one of the adjacent roof backboards is close to the sliding support The side-locking structure on one side of the support is connected with the hook, and the side-locking structure on the other side of the roof back panel close to the sliding support is connected with the hook, so that the side-locking structure of the adjacent roof back panel is connected with the hook. By overlapping and fixing each other, it is difficult for rainwater to enter from the edge of the roof backboard, which improves the stability and waterproofing of the roof.

Photovoltaic modules can be lapped on the bearing surface of the roof back sheet. Since only the bearing surface of the roof back sheet in the embodiment of the present disclosure is in contact with the photovoltaic modules, and no other structure affects the arrangement of the photovoltaic modules, the embodiments of the present disclosure do not limit the width and overlap angle of the photovoltaic modules.

Optionally, referring to FIG. 7 , the roof structure further includes: an intermediate support 20 ; the intermediate support 20 is engaged with the two fastening structures of the roof back panel 10 , and is also connected to the purlin.

During construction, the bottom of the sliding support 30 is fixed on the purlin below the overlap of the two roof backboards 10, and the hook on the sliding support 30 and the locking structure on the roof backboard 10 are locked in the form of Snap together, the middle support 20 is installed on the purlin below the convex part of the roof back panel 10, the bending structure on both sides of the middle support 20 is fastened with the buckle structure of the roof back panel 10, and the photovoltaic modules 40 pass through The form of bonding is connected with the bearing surface of the roof back panel 10 .

Optionally, referring to FIG. 6 , a plurality of roof back sheets 10 are overlapped to form a bearing structure, and one bearing structure carries one photovoltaic module 40 .

After the overlapping of the plurality of roof backboards 10 is completed, the bearing surfaces on the plurality of roof backboards 10 together form a bearing structure, and one bearing structure can be used to carry one photovoltaic module 40 .

For example, the load-bearing structure can be formed by overlapping two roof backboards, so the load-bearing surfaces on the two roof structures can be in contact with the photovoltaic module at the same time to jointly carry the photovoltaic module. Obviously, if a larger photovoltaic module needs to be carried, Then, a load-bearing structure can be formed by overlapping two or more roof backboards to carry larger photovoltaic modules. Therefore, the roof structure formed by the overlapping of the roof backboards in the embodiments of the present disclosure can carry photovoltaic modules of any size without changing the size of the roof backboards.

Optionally, referring to FIG. 3 , first fixing holes 23 are provided on both sides of the intermediate support, and fasteners pass through the first fixing holes 23 to fixedly connect the intermediate support and the purlin.

In order to install the middle support 20 on the purlin, at least one first fixing hole 23 is respectively provided on the bending structure on both sides of the middle support, and the first fixing hole 23 is a through hole structure. During installation, the fasteners pass through the first fixing holes 23 to fixedly connect the intermediate support and the purlin.

Optionally, referring to FIG. 5 , the bottom of the sliding support is provided with a second fixing hole 32 , and the fastener passes through the second fixing hole 32 to fixedly connect the sliding support and the purlin.

In order to install the sliding support on the purlin, at least one second fixing hole 32 is further provided at the bottom of the sliding support, and the second fixing hole 32 is a through hole structure. During installation, the fasteners pass through the second fixing holes 32 to fixedly connect the sliding support and the purlin.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The embodiments of the present disclosure have been described above in conjunction with the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present disclosure, many forms can be made without departing from the scope of the present disclosure and the protection scope of the claims, which all fall within the protection of the present disclosure.

Claims

A roof back plate, the roof back plate is used to carry photovoltaic modules, characterized in that the roof back plate comprises:

a plurality of concave parts, and a convex part formed by connecting the sides of adjacent said concave parts;

Two opposite sides of the roof back panel in the lateral direction are provided with a locking structure, and the locking structure is used to connect with the hook of the sliding support;

In the roof back panel, the height of the protruding portion is greater than the height of the seaming structures provided on the two opposite sides;

The bottom of the protruding portion is provided with at least one buckle structure, and the buckle structure is used to buckle with the intermediate support.
The roof back panel according to claim 1, wherein the intermediate support comprises a support body and bending structures located on both sides of the support body, and the bending structures face the support body The shape of the buckle structure matches the shape of the bending structure.
The roof back panel according to claim 1, wherein the locking structure comprises a male rib and a female rib, the shape of the male rib matches the shape of the inner side of the hook, and the shape of the female rib Matches the shape of the outer side of the hook; one side of the roof back panel is engaged with the inner side of the hook through the male rib, and the other side of the roof back panel is connected to the other side through the female rib The outside of the hook engages.
The roof back panel according to claim 1, wherein the number of the concave parts is 2, the top of the convex part is a plane structure, and the plane structure forms a bearing surface for bearing photovoltaic modules.
A roof structure, characterized in that the roof structure comprises: a photovoltaic module, a sliding support, an intermediate support, and the roof back plate according to any one of claims 1-4; The support is connected, the locking structure on one side of the roof back plate is connected with the hook of a sliding support, and the locking structure on the other side of the roof back plate is connected with the hook of another adjacent sliding support; The intermediate support is fastened with the fastening structure of the roof backboard, and is also connected with the purlin; the photovoltaic component is overlapped on the bearing surface of the roof backboard.
The roof structure according to claim 5, wherein a plurality of the roof backboards are overlapped to form a bearing structure, and one bearing structure carries one photovoltaic module.
The roof structure according to claim 5, wherein first fixing holes are provided on both sides of the intermediate support, and fasteners pass through the first fixing holes to fixedly connect the intermediate support and the purlin .
The roof structure according to claim 5, wherein the bottom of the sliding support is provided with a second fixing hole, and a fastener passes through the second fixing hole to fixedly connect the sliding support and the purlin.