CN221609299U - Photovoltaic system for industrial and commercial roof - Google Patents

Abstract

The utility model discloses a photovoltaic system for industrial and commercial roofs, which comprises photovoltaic panel units, a support and a heightening structure frame, wherein the heightening structure frame is fixed on the roof of an industrial and commercial building, the support is erected and fixed on the top of the heightening structure frame, the photovoltaic panel units are paved along the top surface of the support, the heightening structure frame lifts the photovoltaic panel units to be higher than a protruding functional structure of the roof without affecting the use and maintenance of the functional structure, and the photovoltaic roof formed by the photovoltaic panel units fully covers the surface area of the roof of the industrial and commercial building. The method has the advantages of high space utilization rate and improvement of the efficiency of the photovoltaic system.

Description

Photovoltaic system for industrial and commercial roof

Technical Field

The utility model mainly relates to a solar photovoltaic power generation technology, in particular to a photovoltaic system for industrial and commercial roofs.

Background

Solar energy is energy generated by the continuous nuclear fusion reaction process of black seeds in the sun or on the surface. The solar energy has the advantages of sufficient resources, long service life, wide distribution, safety, cleanness, reliable technology and the like, and the application range is very wide because the solar energy can be converted into various other forms of energy. The power obtained from solar energy is obtained by performing photoelectric conversion by a solar cell.

Photovoltaic panels are often mounted on the roof of buildings over large areas to receive sunlight and produce electrical energy. Under specific conditions, the roof can be replaced by a photovoltaic panel covered on the top surface of the building, so that the effect of shielding wind and rain is achieved.

Currently, the roof space of Xu Duogong commercial houses is not reasonably utilized, and the roof of commercial houses often has a plurality of structures such as ventilation skylights 4 and dormer 5 (as shown in fig. 1), so that the roof is divided into a plurality of small areas by the structures such as the ventilation skylights 4 and dormer 5. In order not to affect the normal use of the functional structures and the efficiency of the photovoltaic system can be affected by the projection of the structures, in the prior art, the photovoltaic system is only paved in a small area separated, and some spaces are reserved for avoiding the structures such as the ventilation skylight 4, the dormer 5 and the like, so that the utilization rate of the photovoltaic system in the roof space is reduced.

Disclosure of utility model

The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide the photovoltaic system for industrial and commercial roofs, which has the advantages of high space utilization rate and high photovoltaic system efficiency.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The utility model provides a photovoltaic system for industrial and commercial roof, includes photovoltaic panel unit, support and increases the structure frame, increase the structure frame and fix at industrial and commercial building's roof, the support is set up and is fixed at increasing the structure frame top, photovoltaic panel unit lays along the support top surface, increase the structure frame and increase the photovoltaic panel unit lifting to the protruding functional structure top of roof and do not influence the use and the maintenance of functional structure, the photovoltaic roof that each photovoltaic panel unit constitutes carries out full coverage to industrial and commercial building's roof surface area.

As a further improvement of the above technical scheme:

The heightening structure frame comprises a plurality of heightening upright posts, the heightening upright posts are arranged at intervals along the edge of the roof of the industrial and commercial building, diagonal braces are connected between the heightening upright posts, and the support is erected and fixed on the heightening upright posts along the transverse and longitudinal directions.

The diagonal brace is also connected with the bracket.

The roof of the industrial and commercial building comprises a building matrix and color steel tiles arranged at the top of the building matrix, and the heightening upright post penetrates through the color steel tiles and is fixedly connected with the building matrix.

And a sealing piece is arranged at the penetrating position of the heightening upright post and the color steel tile.

The sealing piece comprises a sleeve body, the sleeve body is sleeved on the heightening upright post, the inner wall of the sleeve body and the heightening upright post form a seal, and the outer wall of the sleeve body and the color steel tile form a seal.

The top of the sleeve body is upwards provided with an extension binding edge, and the extension binding edge is tightly bound on the heightening upright post.

The side part of the sleeve body is provided with an extending and pressing edge, and the extending and pressing edge is pressed on the surface of the color steel tile.

The photovoltaic panel unit comprises a longitudinal frame, a transverse frame and a photovoltaic panel, wherein the longitudinal frame is fixedly supported on the support along the length direction of the support, the transverse frame is connected with the longitudinal frame, and the photovoltaic panel is installed in a frame formed by the longitudinal frame and the transverse frame.

The support is provided with a water guide pressing piece which is used for pressing and fixing the longitudinal frame and can guide and discharge rainwater rapidly.

The water guide pressure piece comprises a gland and a fastening piece, and the gland is fixedly connected with the bracket through the fastening piece.

And water guide slope surfaces are formed on two sides of the gland.

The fastener comprises an anchor pulling bolt and a locking nut, an anchor pulling groove is formed in the top of the support, a screw head of the anchor pulling bolt is arranged in the anchor pulling groove, a screw body of the anchor pulling bolt penetrates through the gland, and the locking nut is in threaded fastening with the anchor pulling bolt and provided with a supporting gland to compress the longitudinal frame.

The drainage plate positioned in the gland is formed on the longitudinal frame, and the drainage cavity is formed between the drainage plate and the gland.

Drainage grooves are formed in the bottom of the support towards two sides.

Two horizontal frames of adjacent photovoltaic panel units overlap each other in order to form the waterproof construction that prevents rainwater from oozing from the clearance between the two, install on the support and be used for supporting two adjacent horizontal frames and can receive oozing rainwater and drain its drainage support piece down.

And the two transverse frames which are mutually overlapped are provided with water-blocking sealing bodies for preventing rainwater from flowing backwards from the drainage supporting piece at the overlapping positions.

Among the two adjacent horizontal frames, one horizontal frame top shaping has waterproof eaves, waterproof eaves overlap joint is at another horizontal frame top, the sealing body that blocks water sets up between waterproof eaves and corresponding another horizontal frame top.

The drainage support piece is provided with a water outlet groove, and the water outlet groove is positioned below a gap between two adjacent transverse frames.

The drainage support piece comprises a drainage support plate, a connecting plate is formed in the drainage support plate and is fixedly connected with the support through bolts, the drainage support plate is connected with two adjacent transverse frames, and the water outlet groove is formed in the drainage support plate.

The water draining support plate is characterized in that a buckling groove is formed in the transverse frame, two buckling edges are formed in the water draining support plate, and the two buckling edges are buckled with the corresponding buckling grooves.

And the bracket is provided with a pressing piece for pressing and fixing the longitudinal frame.

The compressing piece comprises a pressing plate and a locking bolt, the pressing plate is pressed on the longitudinal frame, and the locking bolt penetrates through the pressing plate and is fixedly connected with the support.

The compressing piece comprises a pressing plate, a locking bolt and a mounting plate, wherein the mounting plate is fixedly supported on the bracket, the pressing plate is pressed on the longitudinal frame, and the locking bolt is arranged on the pressing plate in a penetrating mode and is fixedly connected with the mounting plate.

And a drainage piece used for receiving and draining rainwater seeping downwards in a gap between two transverse frames of the adjacent photovoltaic panel units is arranged on the support.

The heightening upright post is welded with the building matrix or connected with the building matrix by bolts.

Compared with the prior art, the utility model has the advantages that:

When the photovoltaic system for the industrial and commercial building roof is installed, the heightening structure frame is firstly built on the industrial and commercial building roof, then the support is built on the heightening structure frame, and then the photovoltaic panel unit is paved on the support. Compared with the traditional structure, the photovoltaic panel unit is lifted and heightened above the protruding functional structure of the roof by building the heightening structure frame, so that the photovoltaic system can fully cover the roof of the industrial and commercial building, the utilization rate of the roof space is greatly improved, meanwhile, the photovoltaic system is not influenced by the projection of the protruding functional structure of the roof, the efficiency of the photovoltaic system is improved, and in addition, the use and maintenance of the functional structure are not influenced by the arrangement of the photovoltaic system.

Drawings

Fig. 1 is a schematic view of a roof structure.

Fig. 2 is a schematic overall structure (perspective view) of embodiment 1 of the present utility model.

Fig. 3 is a schematic overall structure (top view) of embodiment 1 of the present utility model.

Fig. 4 is a sectional view A-A in fig. 3.

Fig. 5 is a sectional view of B-B in fig. 3.

Fig. 6 is an enlarged view at a in fig. 2.

Fig. 7 is an enlarged view at B in fig. 6.

Fig. 8 is a partial schematic structural view of embodiment 2 of the present utility model.

Fig. 9 is a partial schematic structural view of embodiment 2 of the present utility model.

Fig. 10 is a partial schematic structure of embodiment 3 of the present utility model.

Fig. 11 is a partial schematic structure of embodiment 3 of the present utility model.

The reference numerals in the drawings denote:

1. A photovoltaic panel unit; 10. a drainage cavity; 11. a longitudinal frame; 112. a drain plate; 12. a transverse frame; 121. waterproof eave; 122. a buckling groove; 13. a drainage support; 131. a water outlet tank; 132. a drainage support plate; 1321. buckling edges; 133. a connecting plate; 14. a water-blocking seal; 15. a pressing member; 151. a pressing plate; 152. a locking bolt; 153. a mounting plate; 16. a drain member; 2. a bracket; 21. an anchor pulling groove; 22. a drainage channel; 3. a height-increasing structural frame; 31. height-increasing upright posts; 32. a diagonal brace; 6. building a substrate; 7. color steel tile; 8. a seal; 81. a sleeve body; 82. extending the wrapping edge; 83. extending the compression edge; 9. a water guide pressing member; 91. a gland; 911. a water guiding slope; 92. a fastener; 921. an anchor bolt is pulled; 922. and (5) locking the nut.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the specific examples.

Example 1:

as shown in fig. 1 to 7, a first embodiment of the photovoltaic system for industrial and commercial roofs of the present utility model comprises a photovoltaic panel unit 1, a bracket 2 and a height-increasing structure frame 3, wherein the height-increasing structure frame 3 is fixed on the roof of an industrial and commercial building, the bracket 2 is erected and fixed on the top of the height-increasing structure frame 3, the photovoltaic panel unit 1 is laid along the top surface of the bracket 2, the height-increasing structure frame 3 lifts the photovoltaic panel unit 1 to use and overhaul of a functional structure, and the photovoltaic roof formed by each photovoltaic panel unit 1 fully covers the roof surface area of the industrial and commercial building. During installation, the heightening structure frame 3 is firstly built on the roof of the industrial and commercial building, then the support 2 is built on the heightening structure frame 3, and the photovoltaic panel unit 1 is paved on the support 2. Compared with the traditional structure, the photovoltaic panel unit 1 is lifted and heightened above the functional structure by building the heightening structure frame 3, so that the photovoltaic system fully covers the industrial and commercial building roof, the utilization rate of the roof space is greatly improved, meanwhile, the photovoltaic system is not influenced by projection of the functional structure, the efficiency of the photovoltaic system is improved, and in addition, the arrangement of the photovoltaic system does not influence the use and maintenance of the functional structure.

In this embodiment, the functional structures include structures such as a ventilation skylight 4 and a clerestory 5.

In this embodiment, the heightening structure frame 3 includes a plurality of heightening columns 31, each heightening column 31 is arranged at intervals along the edge of the roof of the industrial and commercial building, diagonal braces 32 are connected between the heightening columns 31, and the bracket 2 is erected and fixed on each heightening column 31 in the transverse and longitudinal directions. The inclined stay bars 32 form a stable triangular structure, so that the structural strength is improved, and the structure is simple, firm and reliable.

In this embodiment, the diagonal brace 32 is also connected to the bracket 2. Which enhances the mounting strength of the bracket 2.

In this embodiment, the roof of the industrial and commercial building comprises a building base 6 and a color steel tile 7 arranged on the top of the building base 6, and the heightening upright column 31 passes through the color steel tile 7 and is fixedly connected with the building base 6. The color steel tile 7 is for building the base member 6, and structural strength is low, is inconvenient for heightening the connection installation of stand 31, and in this structure, heightening stand 31 passes color steel tile 7 and building the base member 6 fixed connection, has improved joint strength, has guaranteed overall structure's firm reliable.

In this embodiment, the sealing member 8 is disposed at the position where the heightening upright column 31 and the color steel tile 7 are connected. The sealing piece 8 is arranged at the penetrating position, so that rainwater leakage caused by perforation is avoided, and the waterproof performance is improved.

In this embodiment, the sealing member 8 includes a sleeve 81, the sleeve 81 is sleeved on the heightening upright 31, the inner wall of the sleeve 81 forms a seal with the heightening upright 31, and the outer wall of the sleeve 81 forms a seal with the color steel tile 7. The waterproof device has the advantages of simple structure and good waterproof effect.

In this embodiment, the top of the sleeve 81 is provided with an extending tightening edge 82 upwards, and the extending tightening edge 82 is tightened on the height-increasing upright 31. The extension wrapping edges 82 are arranged to wrap the heightening upright posts 31, so that the waterproof effect between the sleeve body 81 and the heightening upright posts 31 is improved.

In this embodiment, an extending pressing edge 83 is disposed on a side portion of the sleeve 81, and the extending pressing edge 83 is pressed against the surface of the color steel tile 7. In this structure, the extending compression edge 83 is compressed on the surface of the color steel tile 7, so that the waterproof effect between the sleeve body 81 and the color steel tile 7 is ensured.

In this embodiment, the photovoltaic panel unit 1 includes a longitudinal frame 11, a transverse frame 12, and a photovoltaic panel, where the longitudinal frame 11 is fixed on the support 2 along the length direction of the support 2, the transverse frame 12 is connected with the longitudinal frame 11, and the photovoltaic panel is installed in a frame formed by the longitudinal frame 11 and the transverse frame 12. The edge of the photovoltaic panel is coated in the frame formed by the longitudinal frame 11 and the transverse frame 12, the longitudinal frame 11 is fixedly supported on the support 2 along the length direction of the support 2, the longitudinal frame 11 and the support 2 are stressed together, the load bearing capacity of the whole structure is improved, and the transverse frame 12 only needs to play a role in protecting the photovoltaic panel, so that the photovoltaic panel is simple and reliable in structure.

In this embodiment, the support 2 is provided with a water guiding member 9 for pressing and fixing the longitudinal frame 11 and guiding rainwater rapidly. In this structure, water guide pressure spare 9 is fixed to compress tightly on support 2 with vertical frame 11, can also carry out quick water conservancy diversion discharge with the rainwater simultaneously, its design benefit.

In the present embodiment, the water guide 9 includes a pressing cover 91 and a fastening member 92, and the pressing cover 91 is fastened to the bracket 2 by the fastening member 92. The structure is simple, and the connection is firm.

In this embodiment, water guiding slopes 911 are formed on both sides of the pressing cover 91. The water guide slope 911 is arranged on the gland 91 to quickly discharge rainwater on the gland 91, so that rainwater accumulation is avoided, and the waterproof effect is improved.

In this embodiment, the fastener 92 includes a draw anchor bolt 921 and a lock nut 922, the top of the bracket 2 is formed with a draw anchor groove 21, the screw head of the draw anchor bolt 921 is placed in the draw anchor groove 21, the screw body of the draw anchor bolt 921 passes through the pressure cover 91, and the lock nut 922 is screwed with the draw anchor bolt 921 and presses the longitudinal frame 11 with the support pressure cover 91.

In this embodiment, a drain plate 112 positioned in the gland 91 is formed on the longitudinal frame 11, and a drain cavity 10 is formed between the drain plate 112 and the gland 91. In this structure, the drain plate 112 is formed on the longitudinal frame 11, and forms the drain chamber 10 with the pressing cover 91, so as to drain the permeated rainwater in a diversion manner, thereby improving the waterproof effect of the whole structure.

In this embodiment, the bottom of the bracket 2 is formed with drain grooves 22 toward both sides. The drainage groove 22 can drain the rainwater which seeps downwards along the gradient of the roof, so that the waterproof effect is further improved.

In this embodiment, two lateral frames 12 of adjacent photovoltaic panel units 1 overlap each other to form a waterproof structure preventing rainwater from leaking downwards from a gap between them, and a drainage support 13 for supporting the two adjacent lateral frames 12 and capable of receiving the leaking rainwater to drain the same is mounted on the bracket 2. In this structure, adjacent horizontal frame 12 overlap joint each other can place rainwater infiltration, sets up drainage support piece 13 in adjacent horizontal frame 12 below and can collect the rainwater of infiltration and discharge, and its water-proof effects is good.

In this embodiment, two overlapping transverse frames 12 are provided with a water-blocking sealing body 14 at overlapping positions for preventing rainwater from flowing backward from the drainage support 13. Providing the water-blocking seal 14 further improves the water-proof effect.

In this embodiment, in two adjacent lateral frames 12, a waterproof eave 121 is formed on the top of one lateral frame 12, the waterproof eave 121 is lapped on the top of the other lateral frame 12, and the water-blocking sealing body 14 is disposed between the waterproof eave 121 and the top of the other corresponding lateral frame 12. The waterproof eave 121 is arranged at the top of the other transverse frame 12 in a lap joint mode, a waterproof structure is formed, and the waterproof effect is good.

In this embodiment, the drainage support 13 is provided with a water outlet groove 131, and the water outlet groove 131 is located below the gap between two adjacent lateral frames 12. The structure is simple, and the water outlet groove 131 can collect and discharge rainwater permeated from the gaps of the adjacent transverse frames 12.

In this embodiment, the drainage support 13 includes a drainage support plate 132, a connection plate 133 is formed on the drainage support plate 132, the connection plate 133 is fastened to the bracket 2 by bolts, the drainage support plate 132 is connected to two adjacent lateral frames 12, and the water outlet tank 131 is disposed on the drainage support plate 132. In this structure, the drainage support 13 is fastened to the bracket 2 by the connection plate 133, and the lateral frame 12 is connected to the drainage support plate 132, so that the lateral frame 12 can be supported, and the structure is simple, stable and reliable.

In this embodiment, the lateral frame 12 is formed with a fastening slot 122, and the drainage supporting plate 132 is formed with two fastening edges 1321, and the two fastening edges 1321 are fastened with the corresponding fastening slots 122. The buckling connection is simple and convenient to operate.

In this embodiment, the elevation column 31 is welded to the building base 6. The welding connection is firm and reliable.

Example 2:

fig. 8 and 9 show a second embodiment of the photovoltaic system for industrial and commercial roofs of the present utility model, which is substantially identical to embodiment 1, except that:

In this embodiment, the bracket 2 is provided with a pressing member 15 for pressing and fixing the longitudinal frame 11. The vertical frame 11 is pressed and fixed on the bracket 2 by the pressing piece 15, and the structure is stable and reliable.

In this embodiment, the pressing member 15 includes a pressing plate 151 and a locking bolt 152, the pressing plate 151 presses on the longitudinal frame 11, and the locking bolt 152 is disposed on the pressing plate 151 in a penetrating manner and is fastened to the bracket 2. In this structure, the pressing plate 151 is pressed on the longitudinal frame 11, and the longitudinal frame 11 is locked and fixed on the bracket 2 through the locking bolt 152 penetrating through the pressing plate 151, so that the connection is firm and the operation is convenient.

In this embodiment, the elevation column 31 is connected to the building base 6 by bolts. The bolt connection is simple and convenient to operate and convenient to detach and maintain.

Example 3:

Fig. 10 and 11 show a third embodiment of the photovoltaic system for industrial and commercial roofs of the present utility model, which is substantially identical to embodiment 1, except that:

In this embodiment, the pressing member 15 includes a pressing plate 151, a locking bolt 152 and a mounting plate 153, where the mounting plate 153 is supported and fixed on the bracket 2, the pressing plate 151 presses on the longitudinal frame 11, and the locking bolt 152 is disposed on the pressing plate 151 and is fastened to the mounting plate 153. In this structure, the mounting plate 153 is fixed on the bracket 2, then the pressing plate 151 is pressed on the two adjacent longitudinal frames 11, the pressing plate 151 is locked and fixed by the locking bolt 152, and the pressing plate 151 is driven to press and fix the longitudinal frames 11 on the mounting plate 153, so that the operation is simple and convenient, and the connection is firm.

In this embodiment, the support 2 is provided with a drain member 16 for receiving and draining rainwater from the gap between the two lateral frames 12 of the adjacent photovoltaic panel units 1. In this structure, the drainage member 16 is provided to collect and drain rainwater that has permeated into the gap between the adjacent two lateral frames 12, thereby improving the waterproof effect of the overall structure.

While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims (26)

1. A photovoltaic system for use in industrial and commercial roofs, characterized by: including photovoltaic panel unit (1), support (2) and increase structure frame (3), increase structure frame (3) and fix the roof at industrial and commercial building, support (2) set up and fix at increase structure frame (3) top, photovoltaic panel unit (1) are laid along support (2) top surface, increase structure frame (3) and increase photovoltaic panel unit (1) lifting to the protruding functional structure top of roof and do not influence the use and the maintenance of functional structure, the photovoltaic roof that each photovoltaic panel unit (1) constitutes carries out full coverage to industrial and commercial building's roof surface area.

2. The photovoltaic system for industrial and commercial rooftops of claim 1, wherein: the heightening structure frame (3) comprises a plurality of heightening upright posts (31), the heightening upright posts (31) are arranged at intervals along the edge of the roof of the industrial and commercial building, diagonal bracing rods (32) are connected between the heightening upright posts (31), and the support (2) is erected and fixed on the heightening upright posts (31) along the transverse and longitudinal directions.

3. The photovoltaic system for industrial and commercial rooftops of claim 2, wherein: the diagonal brace (32) is also connected with the bracket (2).

4. A photovoltaic system for industrial and commercial roofs according to claim 3, wherein: the roof of industrial and commercial building comprises a building matrix (6) and color steel tiles (7) arranged at the top of the building matrix (6), and the heightening upright posts (31) penetrate through the color steel tiles (7) and are fixedly connected with the building matrix (6).

5. The photovoltaic system for industrial and commercial rooftops of claim 4, wherein: and a sealing piece (8) is arranged at the penetrating position of the heightening upright post (31) and the color steel tile (7).

6. The photovoltaic system for industrial and commercial rooftops of claim 5, wherein: the sealing piece (8) comprises a sleeve body (81), the sleeve body (81) is sleeved on the heightening upright post (31), the inner wall of the sleeve body (81) and the heightening upright post (31) form sealing, and the outer wall of the sleeve body (81) and the color steel tile (7) form sealing.

7. The photovoltaic system for industrial and commercial rooftops of claim 6, wherein: the top of the sleeving body (81) is upwards provided with an extension binding edge (82), and the extension binding edge (82) is tightly bound on the heightening upright column (31).

8. The photovoltaic system for industrial and commercial rooftops of claim 7, wherein: the side part of the sleeve body (81) is provided with an extending and pressing edge (83), and the extending and pressing edge (83) is pressed on the surface of the color steel tile (7).

9. The photovoltaic system for industrial and commercial rooftops according to any one of claims 1 to 8, wherein: the photovoltaic panel unit (1) comprises a longitudinal frame (11), a transverse frame (12) and a photovoltaic panel, wherein the longitudinal frame (11) is fixedly supported on the support (2) along the length direction of the support (2), the transverse frame (12) is connected with the longitudinal frame (11), and the photovoltaic panel is installed in a frame formed by the longitudinal frame (11) and the transverse frame (12).

10. The photovoltaic system for industrial and commercial rooftops of claim 9, wherein: the support (2) is provided with a water guide pressure piece (9) which is used for compressing and fixing the longitudinal frame (11) and can guide and discharge rainwater rapidly.

11. The photovoltaic system for industrial and commercial rooftops of claim 10, wherein: the water guide pressure piece (9) comprises a pressing cover (91) and a fastening piece (92), and the pressing cover (91) is fixedly connected with the bracket (2) through the fastening piece (92).

12. The photovoltaic system for industrial and commercial rooftops of claim 11, wherein: and water guide slope surfaces (911) are formed on two sides of the gland (91).

13. The photovoltaic system for industrial and commercial rooftops of claim 12, wherein: the fastener (92) comprises an anchor pulling bolt (921) and a locking nut (922), an anchor pulling groove (21) is formed in the top of the support (2), a screw head of the anchor pulling bolt (921) is arranged in the anchor pulling groove (21), a screw body of the anchor pulling bolt (921) penetrates through the gland (91), and the locking nut (922) is in threaded fastening with the anchor pulling bolt (921) and provided with a supporting cover (91) to press the longitudinal frame (11).

14. The photovoltaic system for industrial and commercial rooftops of claim 13, wherein: a drain plate (112) positioned in the gland (91) is formed on the longitudinal frame (11), and a drain cavity (10) is formed between the drain plate (112) and the gland (91).

15. The photovoltaic system for industrial and commercial rooftops of claim 14, wherein: drainage grooves (22) are formed in the bottom of the support (2) towards two sides.

16. The photovoltaic system for industrial and commercial rooftops according to any one of claims 10-15, wherein: two transverse frames (12) of adjacent photovoltaic panel units (1) are mutually overlapped to form a waterproof structure for preventing rainwater from leaking downwards from a gap between the two transverse frames, and a drainage support (13) for supporting the two adjacent transverse frames (12) and being capable of receiving leaking downwards rainwater to drain the rainwater is arranged on the support (2).

17. The photovoltaic system for industrial and commercial rooftops of claim 16, wherein: the two transverse frames (12) which are mutually overlapped are provided with water-blocking sealing bodies (14) used for preventing rainwater from flowing backwards from the drainage supporting piece (13) at the overlapping position.

18. The photovoltaic system for industrial and commercial rooftops of claim 17, wherein: among the two adjacent horizontal frames (12), waterproof eaves (121) are formed at the top of one horizontal frame (12), waterproof eaves (121) overlap joint at the top of the other horizontal frame (12), and water-blocking sealing bodies (14) are arranged between the waterproof eaves (121) and the tops of the other corresponding horizontal frames (12).

19. The photovoltaic system for industrial and commercial rooftops of claim 18, wherein: the drainage support piece (13) is provided with a water outlet groove (131), and the water outlet groove (131) is positioned below a gap between two adjacent transverse frames (12).

20. The photovoltaic system for industrial and commercial rooftops of claim 19, wherein: the drainage support piece (13) comprises a drainage support plate (132), a connecting plate (133) is formed on the drainage support plate (132), the connecting plate (133) is fixedly connected with the support (2) through bolts, the drainage support plate (132) is connected with two adjacent transverse frames (12), and the water outlet groove (131) is formed in the drainage support plate (132).

21. The photovoltaic system for industrial and commercial rooftops of claim 20, wherein: the water draining support plate (132) is provided with two buckling edges (1321) in a buckling mode, and the two buckling edges (1321) are buckled with the corresponding buckling grooves (122).

22. The photovoltaic system for industrial and commercial rooftops of claim 9, wherein: the support (2) is provided with a pressing piece (15) for pressing and fixing the longitudinal frame (11).

23. The photovoltaic system for industrial and commercial rooftops of claim 22, wherein: the pressing piece (15) comprises a pressing plate (151) and a locking bolt (152), the pressing plate (151) is pressed on the longitudinal frame (11), and the locking bolt (152) penetrates through the pressing plate (151) and is fixedly connected with the bracket (2).

24. The photovoltaic system for industrial and commercial rooftops of claim 22, wherein: the compressing piece (15) comprises a pressing plate (151), a locking bolt (152) and a mounting plate (153), wherein the mounting plate (153) is fixedly supported on the bracket (2), the pressing plate (151) is pressed on the longitudinal frame (11), and the locking bolt (152) is arranged on the pressing plate (151) in a penetrating mode and is fixedly connected with the mounting plate (153).

25. The photovoltaic system for industrial and commercial rooftops of claim 24, wherein: the support (2) is provided with a drainage piece (16) used for receiving and draining rainwater from a gap between two transverse frames (12) of adjacent photovoltaic panel units (1).

26. The photovoltaic system for industrial and commercial rooftops according to any one of claims 2-8, wherein: the heightening upright post (31) is welded with the building matrix (6) or connected by bolts.