CN104563412A - Solar photovoltaic roof structure body - Google Patents

Abstract

The invention discloses a solar photovoltaic roof structure, which includes a roof body and a photovoltaic module. The photovoltaic module is installed on the roof body. The upper surface of the photovoltaic module has an included angle with the horizontal plane; The cleaning system is used to remove debris from the upper surface of photovoltaic modules. In the solar photovoltaic roof structure of the present invention, a photovoltaic module cleaning system is installed on the roof body, and the photovoltaic module cleaning system installed on the roof body can be used to clean the surface of the photovoltaic modules on the roof body to remove impurities on the surface of the photovoltaic modules, Dust, etc.; there is no need to manually clean up the roof. On the one hand, it reduces dangerous operation procedures and improves the safety factor and efficiency of the operation. Better and more efficient.

Description

A solar photovoltaic roof structure

Technical field

The invention relates to a solar photovoltaic roof structure, in particular to a solar photovoltaic roof structure of an industrial factory building.

Background technique

In recent years, my country's building scale has grown significantly, and building energy consumption is increasing day by day. It is imperative to make full use of renewable clean energy to achieve building energy conservation and environmental protection. As a new type of energy, solar energy has attracted more and more attention. The combination of solar photovoltaic products and buildings can effectively use the surface area of buildings to absorb solar energy on the one hand, and enrich the structural form of buildings on the other hand. It is of great significance to vigorously develop building-integrated solar photovoltaic products.

At present, the building-integrated photovoltaic structure system mainly adopts the integration of photovoltaic modules with building roofs, curtain walls, glass windows, sunshades, etc., and installs photovoltaic modules on building roofs, curtain walls, glass windows, sunshades, etc. Photoelectric power generation. However, in a photovoltaic power station, tiny particles such as dust will inevitably accumulate on the surface of the photovoltaic module. Excessive accumulation will reduce the power generation efficiency of the photovoltaic module and affect the overall power generation of the photovoltaic power station. Therefore, regular cleaning and maintenance are required. Most of the existing photovoltaic power plants use manual cleaning of photovoltaic modules. For building sloping roofs or exterior wall photovoltaic integration, if manual cleaning is used, it will not only waste a lot of human resources, but also the manual operation at high altitude is complicated, the safety factor is low, the cleaning effect is poor and the work efficiency is low. This defect is especially obvious in large-scale industrial plants. .

Contents of the invention

The object of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a solar photovoltaic roof structure with high cleaning efficiency and good safety.

Further, the object of the present invention is to provide a solar photovoltaic roof structure that is convenient for maintenance or installation of photovoltaic modules.

In order to realize the above-mentioned purpose of the invention, the present invention provides the following technical solutions:

A solar photovoltaic roof structure, including a roof body and a photovoltaic module, the photovoltaic module is installed on the roof body, the upper surface of the photovoltaic module has an included angle with the horizontal plane; the roof body is provided with a photovoltaic module cleaning system , the photovoltaic module cleaning system is used to remove sundries on the upper surface of the photovoltaic module; the photovoltaic module cleaning system includes a cleaning device and a drainage device; the cleaning device is arranged laterally on the roof body and is located on the photovoltaic module above; the drainage device is arranged laterally on the roof body and below the photovoltaic module. For the solar photovoltaic roof structure with the above structure, the cleaning device sprays a cleaning liquid (such as water and other flowing liquid), and the cleaning liquid takes away impurities on the surface of the photovoltaic module, and the cleaning liquid that has cleaned the photovoltaic module and contains impurities and dust passes through the photovoltaic The slope of the module flows down to the drainage device at the lower end of the photovoltaic module, and the drainage device discharges the cleaning liquid with impurities and water out of the roof body to keep the roof body clean. Arranging the cleaning device and the drainage device horizontally on the roof body can make the cleaning liquid flow out of the slope of the photovoltaic module along the shortest distance and take away the impurities on the surface of the photovoltaic module. Use less. In the solar photovoltaic roof structure of the present invention, a photovoltaic module cleaning system is installed on the roof body, and the photovoltaic module cleaning system installed on the roof body can be used to clean the surface of the photovoltaic modules on the roof body to remove impurities on the surface of the photovoltaic modules, Dust etc. There is no need to manually clean the roof. On the one hand, it reduces dangerous work procedures and improves the safety factor and efficiency of work. On the other hand, using the photovoltaic module cleaning system to clean the sundries on the surface of photovoltaic modules is more timely than manual cleaning, and the cleaning effect is better. higher efficiency.

As a preferred solution of the present invention, the cleaning device includes a water storage tank, a water delivery pipeline, a cleaning pipeline and a nozzle; one end of the water delivery pipeline is connected to one end of the cleaning pipeline, and the other end of the water delivery pipeline is located at the In the water storage tank, the other end of the cleaning pipeline is closed; the cleaning pipeline is arranged horizontally on the roof body, the cleaning pipeline and the photovoltaic module are located on the same inclined plane, and the cleaning pipeline is located on the photovoltaic module above; the nozzles are arranged on the cleaning pipeline and distributed along the length direction (axial direction) of the cleaning pipeline, the nozzles are located above the photovoltaic module and open toward the photovoltaic module; the drainage device is A cleaning water tank, the cleaning water tank is arranged laterally on the roof body and located below the lower end of the photovoltaic module, and the outlet of the cleaning water tank is located on the side of the roof body. In the photovoltaic module cleaning system with the above structure, the cleaning liquid water is stored in the water storage tank, and the water comes out of the water storage tank and enters the cleaning pipeline through the water delivery pipeline. Impurities and dust. The water that has cleaned the surface of the photovoltaic module directly flows into the cleaning tank through the upper surface of the photovoltaic module, and is discharged from the roof body (that is, the roof) by the cleaning tank. The water discharged from the roof body can be directly returned to the water storage tank for recycling after standing and settling. The photovoltaic module with the above structure has the advantages of simple structure, low cost and good cleaning effect.

As a preferred solution of the present invention, the distance between the cleaning pipeline and the photovoltaic module is 5-10 cm, and the water outlet channel of the nozzle is parallel to the upper surface of the photovoltaic module. Since the photovoltaic module is relatively inclined to the horizontal direction, the outlet channel of the nozzle is parallel to the upper surface of the photovoltaic module, and the distance between the cleaning pipe and the photovoltaic module is 5-10 cm, which can improve the washing area, washing effect and washing efficiency of the photovoltaic module and reduce energy consumption ; At the same time, it can also reduce the impact of water flow on photovoltaic modules and avoid damage to photovoltaic modules caused by the cleaning process.

As a preferred solution of the present invention, a roof inspection and maintenance channel is also provided on the roof body, and the roof inspection and maintenance channel is arranged transversely on the roof body and located at the lower end of the photovoltaic module. A roof inspection and maintenance channel is provided on the roof body at the lower end of the photovoltaic module, which can facilitate the installation and maintenance of the photovoltaic module by staff. Moreover, maintenance personnel or installers standing on the roof inspection and maintenance channel can reduce the load-bearing capacity (pressure) per unit area of the roof body bearing the weight of installers and maintenance personnel to avoid damage to the roof and improve the safety factor of photovoltaic module installation and maintenance work . The solar photovoltaic roof body with this structure is especially effective when applied to industrial plants with large area and weak roof bearing capacity.

As a preferred solution of the present invention, the photovoltaic module cleaning system, the photovoltaic module and the roof inspection and maintenance channel include two or more groups, and each group is arranged in parallel on the roof body. On a large-area roof body, such as the roof of an industrial factory building, by setting up multiple sets of three-in-one photovoltaic module cleaning systems, the photovoltaic modules and the roof inspection and maintenance channels, not only can make full use of the large area of the roof body, Strong sunlight resources, and by setting up a cleaning system and maintaining installation channels, can greatly improve the cleaning efficiency of photovoltaic modules and the safety factor of installation and maintenance.

As a preferred solution of the present invention, the roof inspection and maintenance channel includes an inspection frame column, an inspection frame beam and a sidewalk, the lower end of the inspection frame column is fixed on the roof body, and the inspection frame beam is fixed on the inspection frame beam. At the upper end of the frame column, the pedestrian board is fixed on the inspection frame beam. The roof inspection and maintenance access of the above structure adopts a frame-type installation structure. The overall weight of the maintenance channel is light, which can reduce the pressure of the maintenance channel on the roof body, and the roof body is not easily damaged; It is safer to walk on it.

As a preferred solution of the present invention, the upper surface of the walkboard is located on a horizontal plane. The pedestrian board is placed horizontally, and it is safer for staff to walk on it.

As a preferred solution of the present invention, a support frame is provided on the roof body, and the support frame is fixed on the truss beam of the roof body; the photovoltaic module, the photovoltaic module cleaning system and the roof repair and maintenance A channel is mounted on the support frame. Install photovoltaic modules, photovoltaic module cleaning system and roof inspection and maintenance access on the roof body through the supporting frame. The damage to the roof body caused by the installation of components, cleaning systems and maintenance channels reduces the installation workload and preserves the original roof body to the greatest extent without damaging the existing waterproof system of the roof. And setting the support frame on the roof truss beam of the roof body can increase the load-bearing capacity of the support frame, and at the same time avoid damage to the top of the roof body due to the excessive weight of the installation parts.

As a preferred solution of the present invention, the support frame includes a support frame column and a support frame beam, the lower end of the support frame column is fixed on the roof truss beam of the roof body, and the support frame beam is fixed on the upper end of the support frame column; The photovoltaic module, the photovoltaic module cleaning system and the roof inspection and maintenance channel are fixed on the supporting frame beam. The support frame of the above structure has simple structure, strong bearing capacity and convenient installation.

As a preferred solution of the present invention, guide rails are fixed on the support frame beams, and the guide rails are arranged transversely on the support frame beams; the photovoltaic modules are installed on the guide rails and fixed by connecting fasteners. A guide rail is set on the supporting frame. When installing the photovoltaic module, the photovoltaic module is lifted onto the guide rail, and the photovoltaic module is transported to the predetermined installation position along the guide rail, and then the photovoltaic module is fixed by the connecting fastener. With this kind of structural support frame, the installation process of photovoltaic modules is simple and the installation is overall, which can not only improve the installation efficiency of photovoltaic modules, but also comprehensively arrange the photovoltaic modules to improve the utilization rate of the roof.

Compared with prior art, the beneficial effect of the present invention :

1. In the solar photovoltaic roof structure of the present invention, a photovoltaic module cleaning system is installed on the roof body, and the photovoltaic module cleaning system installed on the roof body can be used to clean the surface of the photovoltaic modules on the roof body to remove the surface of the photovoltaic module. Impurities, dust, etc. There is no need to manually clean the roof. On the one hand, it reduces dangerous work procedures and improves the safety factor and efficiency of work. On the other hand, using the photovoltaic module cleaning system to clean the sundries on the surface of photovoltaic modules is more timely than manual cleaning, and the cleaning effect is better. higher efficiency.

2. In the solar photovoltaic roof structure of the present invention, a roof inspection and maintenance channel is provided on the roof body at the lower end of the photovoltaic module, which can facilitate the installation and maintenance of the photovoltaic module by staff. Moreover, maintenance personnel or installers standing on the roof inspection and maintenance channel can reduce the load-bearing capacity (pressure) per unit area of the roof body bearing the weight of installers and maintenance personnel to avoid damage to the roof and improve the safety factor of photovoltaic module installation and maintenance work . In particular, the solar photovoltaic roof body with this structure is particularly effective when applied to industrial plants with large area and weak roof bearing capacity.

3. The solar photovoltaic roof structure of the present invention installs photovoltaic modules, photovoltaic module cleaning systems and roof maintenance and maintenance passages on the roof body through the supporting frame. The impact of installation, on the other hand, can also reduce the damage to the roof body caused by the installation of photovoltaic modules, cleaning systems and maintenance channels, reduce the installation workload and keep the roof body as it is to the greatest extent. And setting the support frame on the roof truss beam of the roof body can increase the load-bearing capacity of the support frame, and at the same time avoid damage to the top of the roof body due to the excessive weight of the installation parts.

4. In the solar photovoltaic roof structure of the present invention, the supporting frame is provided with guide rails, and the photovoltaic module is fixed on the supporting frame through the guide rails. With this kind of structural support frame, the installation process of photovoltaic modules is simple and the installation is overall, which can not only improve the installation efficiency of photovoltaic modules, but also comprehensively arrange the photovoltaic modules to improve the utilization rate of the roof.

Description of drawings:

Fig. 1 is a solar photovoltaic roof body (axial view) according to Embodiment 1 of the present invention.

Fig. 2 is a photovoltaic module cleaning system according to Embodiment 1 of the present invention.

Fig. 3 is the roof overhaul and maintenance channel of Embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of the connection between the guide rail and the supporting frame according to Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the connection between the photovoltaic module and the guide rail in Embodiment 1 of the present invention.

Fig. 6 is a cross-sectional view of the guide rail of Embodiment 1 of the present invention.

Fig. 7 is a schematic structural diagram of the intermediate connecting fastener according to Embodiment 1 of the present invention.

Fig. 8 is a schematic structural view of the end connection fastener according to Embodiment 1 of the present invention.

Marks in the figure: 1-roof body, 2-truss beam, 3-roof purlin, 4-roof color steel plate, 5-supporting frame column, 6-supporting frame beam, 7-water storage tank, 8-water pipeline, 9- Cleaning pipe, 10-nozzle, 11-cleaning sink, 12-guide rail, 13-photovoltaic module, 14-connecting fastener in the middle, 15-connecting fastener at the end, 16-bolt, 17-connecting piece between guide rail and supporting frame beam, 18-Inspection frame column, 19-Inspection frame beam, 20-Pedestrian board, 21-Screw, 22-Middle hole of connecting fastener in the middle, 23-Side hole of end connecting fastener, 24-Gross in the middle of guide rail, 25-Guide rail upper groove.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

Example 1

The solar light roof structure in this embodiment is a solar photovoltaic roof structure applied to industrial plants.

As shown in Figure 1, the solar photovoltaic roof structure of an industrial plant in this embodiment includes a roof body 1 (including roof truss beams 2, roof purlins 3 and roof color steel plates 4), a support frame fixed on the roof body 1 (including a support frame columns 5 and support frame beams 6), photovoltaic modules 13 installed on the support frame through guide rails 12, and photovoltaic module cleaning system (including water storage tank 7, water delivery pipeline 8, cleaning pipeline 9, nozzle 10 and cleaning water tank 11) and Roof inspection and maintenance access (including inspection frame beams 19, inspection frame beams and columns 18 and pedestrian boards 20). The part above A-A in Fig. 1 is a set of solar photovoltaic roof structures of a complete system, and the part below A-A is a part of the solar photovoltaic roof structure not drawn in the system.

The roof body 1 of an industrial factory building includes roof truss beams 2 , roof purlins 3 and roof color steel plates 4 . The roof truss beam 2 is arranged longitudinally (that is, the Y direction in Figure 1) on the industrial factory building; the roof purlin 3 is arranged horizontally (that is, the X direction in Figure 1) on the industrial factory building, and is fixed on the roof truss beam 2, and the roof color steel tile 4 It is laid on the roof purlin 3 and the roof truss beam 2. Roof truss beams 2, roof purlins 3 and roof color steel plates 4 jointly form the roof of the industrial factory building, and the roof is a steel frame structure with a "herringbone" shape on one side.

A supporting frame is welded on the roof truss beam 2 , as shown in FIG. 4 and FIG. 6 , the supporting frame includes a supporting frame column 5 and a supporting frame beam 6 . The lower end of the supporting frame column 5 is fixed on the roof truss beam 2 of the roof body 1, and the supporting frame beam 6 is welded on the upper end of the supporting frame column 5. The supporting frame column 5 is 10-50 cm high, which is convenient for manual maintenance and operation.

The photovoltaic module 13 is fixed on the support frame through the guide rail 12 . The photovoltaic module 13 is arranged obliquely, and its upper surface has an included angle with the horizontal direction. As shown in FIG. 4 , the guide rail 12 is arranged laterally on the supporting frame beam 6 through the connecting piece 17 and the bolt 16 . At the intersection of each guide rail 12 and the supporting frame beam 6, there is a connecting piece 17 on the left and right sides of the guiding rail 12 (that is, viewed from the side of the roof body 1), and the connecting piece 17 is fixed by bolts 16 and the guide rail 12 is fixed on the supporting frame beam. 6 on. FIG. 8 is a schematic structural view of the connecting piece 17 between the guide rail 12 and the supporting frame beam 6 . After the guide rail 12 and the support frame beam 6 are fixed, the bolt 16 passes through the hole on the connector 17 and penetrates to the guide rail middle groove 24 of the guide rail 12, and the connector 17 and the guide rail 12 can be fixed on the support frame beam by tightening the bolt 16 6, the position of the groove 24 in the middle of the guide rail is shown in Figure 6, which is a cross-sectional view of the guide rail 12 in this embodiment. A schematic diagram of the connection between the photovoltaic module 13 and the guide rail 12 is shown in FIG. 5 . The size of the photovoltaic modules 13 is 1.2m×1.5m. There are two guide rails 12 under each row of photovoltaic modules 13, and the distance between the two guide rails 12 is 60-120cm. The photovoltaic module 13 slides in from one end of the guide rail 12 and moves to a predetermined installation position. The photovoltaic module 13 is fixed on the guide rail 12 through connecting fasteners (the middle connecting fastener 14 and the end connecting fastener 15 ). As shown in FIG. 7 , the middle connecting fastener 14 includes three connecting parts, each connecting part is provided with a connecting hole, and the three connecting parts together form a groove with a rectangular cross section. The middle hole 22 of the middle connecting fastener at the bottom is used for installing the bolt that fixes the middle connecting fastener 14 on the guide rail 12 . The connecting holes on the connecting parts on both sides of the bottom are used for installing the bolts connecting the middle connecting fastener 14 and the photovoltaic module 13 . Two adjacent photovoltaic modules 13 are connected by two middle connection fasteners 14 arranged in parallel and fixed on the guide rail 12 . Both sides of the outermost photovoltaic module are connected and fixed on the guide rail 12 through end connecting fasteners 15 (as shown in FIG. 8 ). After the connection, the bolt passes through the side hole 23 on the end connecting fastener 15 and then penetrates to the upper groove 25 of the guide rail 12 .

The structure of the photovoltaic module cleaning system is shown in Figure 2, including a cleaning device and a drainage device. The cleaning device includes a water storage tank 7 , a water delivery pipeline 8 , a cleaning pipeline 9 and a nozzle 10 . Water storage tank 7 is positioned at " herringbone " font industrial workshop one side. One end of the water delivery pipeline 8 is drawn in the water storage tank 7, and the other end is connected with an end of the cleaning pipeline 9; the other end of the cleaning pipeline 9 is closed. A pumping station is arranged in the water delivery pipeline 8 for adjusting the water pressure introduced into the cleaning pipeline 9 through the water delivery pipeline 8 . The cleaning pipeline 9 is horizontally laid on the support frame beam 6 and is located above the upper end of the photovoltaic module 13 . The cleaning pipeline 9 and the photovoltaic module 13 are located on the same inclined plane, and the distance between the cleaning pipeline 9 and the photovoltaic module 13 is 5-10 cm. Holes are opened on the cleaning pipeline 9 and nozzles 10 are arranged; the nozzles 10 are distributed along the length direction (axial direction) of the cleaning pipeline 9 and are located above the photovoltaic modules 13 . The opening of the nozzle 10 faces the photovoltaic module 13 and the outlet channel of the nozzle 10 is parallel to the upper surface of the photovoltaic module 13 . 5-10 nozzles 10 are arranged above each photovoltaic module 13 . The drainage device is a cleaning water tank 11, which is horizontally arranged on the support frame and located below the lower end of the photovoltaic module 13; the width of the cleaning water tank 11 is 10-20 cm. Along the transverse direction of the roof body 1 , the whole cleaning tank 11 has an inclined slope with the horizontal direction, which can facilitate the drainage of the cleaning tank 11 ; the outlet of the cleaning tank 11 is located on the side of the roof body 1 . A row of cleaning pipes 9 and nozzles 10 are arranged above the upper end of each row of photovoltaic modules 13, and the cleaning pipes 9 and the nozzles 10 can share a water storage tank 7, and water is introduced into Clean waterways9. A row of cleaning water tanks 11 is arranged below the lower end of each row of photovoltaic modules 13, and the sewage or rainwater after each row of photovoltaic modules is cleaned is respectively discharged from the roof. When the photovoltaic module cleaning system is working, the motor pumps clean water from the water storage tank 7, and the clean water enters the cleaning pipe 9 through the water delivery pipe 8, and sprays high-pressure water vapor above the photovoltaic module 13 through the nozzle 10, and uses high-pressure water vapor to wash away the deposited on the photovoltaic module. The dust on the upper surface of 13, the sewage or rainwater after cleaning the surface of the photovoltaic module 13 enters the cleaning tank 11, and flows down the slope of the bottom of the cleaning tank 11 to discharge the roof surface. The water in the cleaning water tank 11 can also be led to the water storage tank 7, and reused after sedimentation to realize water circulation and save water.

As shown in FIG. 1 , the roof inspection and maintenance passage is set on the supporting frame and located below the lower end of the row of photovoltaic modules 13 . As shown in FIG. 3 , the roof inspection and maintenance channel includes inspection frame beams 19 and inspection frame beams and columns 18 . The lower end of the inspection frame beam column 18 is fixed on the supporting frame beam 6, the inspection frame beam 19 is welded on the upper end of the inspection frame beam column 18, the upper beam 19 of the inspection frame is laid with a pedestrian board 20, and the pedestrian board 20 is fixed on the inspection frame by screws 21 On the upper beam 19. A roof inspection and maintenance channel is provided under each row of photovoltaic modules 13 . The horizontal distance between the roof inspection and maintenance channel and the photovoltaic modules 13 is 15-30 cm, and the height of the maintenance frame column 18 at the lower end of each row of photovoltaic modules 13 is 10-20 cm higher than that of the cleaning water tank 11, and is 0-20 cm higher than the height of the lowest end of each row of photovoltaic modules 13. 10cm.

Claims (10)

1. a solar photovoltaic roof structure, comprises roofing body and photovoltaic module, and described photovoltaic module is arranged on described roofing body, it is characterized in that:

The upper surface of described photovoltaic module and horizontal plane have an angle;

Described roofing body is provided with photovoltaic module cleaning systems, and described photovoltaic module cleaning systems are for removing the foreign material of photovoltaic module upper surface; Described photovoltaic module cleaning systems comprise cleaning device and drainage arrangement; Described cleaning device is transversely arranged on described roofing body, and is positioned at the top of described photovoltaic module; Described drainage arrangement is transversely arranged on described roofing body, and is positioned at the below of described photovoltaic module.

2. solar photovoltaic roof structure according to claim 1, is characterized in that:

Described cleaning device comprises storage tank, aqueduct, pipe blow-through and nozzle;

One end of described aqueduct is connected with one end of described pipe blow-through, and the other end is positioned at described storage tank; The other end of described pipe blow-through is closed; On roofing body described in described pipe blow-through transverse arrangement of turbo, described pipe blow-through and described photovoltaic module are positioned at same clinoplain, and described pipe blow-through is positioned at the top of described photovoltaic module; Described nozzle to be arranged on described pipe blow-through and along described pipe blow-through length direction distribution, described nozzle be positioned at the top of described photovoltaic module and opening towards described photovoltaic module; Described drainage arrangement is cleaning sink, and described cleaning sink to be transversely arranged on described roofing body and to be positioned at the below of described photovoltaic module lower end, and the outlet of described cleaning sink is positioned at the side of described roofing body.

3. solar photovoltaic roof structure according to claim 2, is characterized in that: described pipe blow-through and described photovoltaic module are at a distance of 5 ~ 10cm, and the exhalant canal of described nozzle is parallel with described photovoltaic module upper surface.

4. solar photovoltaic roof structure according to claim 1, it is characterized in that: described roofing body is also provided with roofing inspection and maintenance passage, described roofing inspection and maintenance passage to be transversely arranged on described roofing body and to be positioned at the lower end of described photovoltaic module.

5. solar photovoltaic roof structure according to claim 4, it is characterized in that: described photovoltaic module cleaning systems, described photovoltaic module and described roofing inspection and maintenance passage comprise two groups or more, and often group is arranged in parallel on described roofing body.

6. solar photovoltaic roof structure according to claim 4, it is characterized in that: described roofing inspection and maintenance passage comprises maintenance frame column, maintenance Vierendeel girder and pedestrian floor, described maintenance frame column lower end is fixed on described roofing body, described maintenance Vierendeel girder is fixed on described maintenance frame column upper end, and described pedestrian floor is fixed on described maintenance Vierendeel girder.

7. solar photovoltaic roof structure according to claim 6, is characterized in that: the upper surface of described pedestrian floor is positioned on horizontal plane.

8. solar photovoltaic roof structure according to claim 4, is characterized in that: described roofing body is provided with support frame, and described support frame is fixed on the roof truss beam of described roofing body; Described photovoltaic module, described photovoltaic module cleaning systems and described roofing inspection and maintenance passage are installed on described support frame.

9. solar photovoltaic roof structure according to claim 8, it is characterized in that: described support frame comprises carriage trestle and support frame beams, described carriage trestle lower end is fixed on the roof truss beam of roofing body, and described support frame beams is fixed on described carriage trestle upper end; Described photovoltaic module, described photovoltaic module cleaning systems and described roofing inspection and maintenance passage are fixed in described support frame beams.

10. solar photovoltaic roof structure according to claim 9, is characterized in that: described support frame beams is fixed with guide rail, described guide rail is transversely arranged in described support frame beams; Described photovoltaic module is arranged on described guide rail, and is fixed by connection fastener.