Composite material photovoltaic bracket for sandy and tidal flat areas and method for manufacturing the composite material

Abstract

The present invention relates to the technical field of photovoltaic supports, and relates to a composite material photovoltaic support for sandy and tidal flat areas and a composite material manufacturing method thereof. The support comprises: a column, an inclined beam, a front diagonal brace, a rear diagonal brace, and a purlin; the column is erected in the installation area of ​​the photovoltaic panel; the inclined beam is arranged obliquely above the column; the front diagonal brace and the rear diagonal brace are respectively arranged on both sides of the column and connected to the column, and the inclined beam, the front diagonal brace, and the rear diagonal brace enclose a triangular support frame at the top of the column; the column is provided with a fixing assembly to prevent the triangular support frame from rotating around the column, and the fixing assembly is connected to the triangular support frame; the two ends of the purlin are respectively connected to the triangular support frames on two adjacent columns, and the photovoltaic panel is fixed on the purlin. The photovoltaic support made of the prepared composite material can reduce the dead weight of the support and improve the corrosion resistance, and can be installed in special environments such as deserts and tidal flats.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic brackets, and in particular to a composite material photovoltaic bracket for sandy and tidal flat areas and a method for manufacturing the composite material. Background Art

[0002] In photovoltaic power generation systems, photovoltaic brackets, as carriers of photovoltaic panels, are the main components of the entire photovoltaic system. Conventional photovoltaic brackets mainly use steel structures. However, when constructing photovoltaic brackets in special environments such as deserts and mudflats, conventional steel structure brackets are heavy and difficult to install. They also have difficulty solving the problems of gravel erosion in windy and sandy areas and salt spray erosion in mudflat environments. The subsequent maintenance costs are high and there are major safety hazards. Therefore, single-column forms are mainly used in deserts and mudflats due to the difficulty of piling. The top of the column often has offset and deflection, which makes installation difficult. Therefore, conventional steel structures mainly use clamp connections to circumvent the problem of column top offset and deflection. However, this type of connection method relying on friction has poor stability and reliability, and fails to give full play to the axial force advantages of the concrete column and the role of the flange end plate. Therefore, it is urgent to solve this problem.

[0003] The above content is only used to assist in understanding the technical solution of the invention and does not constitute an admission that the above content is the closest prior art. Summary of the Invention

[0004] The technical problem to be solved by the invention is to provide a composite photovoltaic bracket for sandy and tidal flat areas and a method for preparing the composite material. The photovoltaic bracket made of the prepared composite material can reduce the bracket's own weight and improve corrosion resistance. It can be installed in special environments such as deserts and tidal flats. In addition, the photovoltaic bracket solves the problem of column angle deflection and improves stability and safety of use.

[0005] To achieve the above-mentioned purpose, the technical solution of the invention is realized as follows: a composite material photovoltaic bracket for sandy and tidal flat areas and a composite material manufacturing method thereof, comprising: a column, an inclined beam, a front inclined support rod, a rear inclined support rod and a purlin; the column is erected in the installation area of ​​the photovoltaic panel; the inclined beam is arranged obliquely above the column; the front inclined support rod and the rear inclined support rod are respectively arranged on both sides of the column and connected to the column, and the inclined beam, the front inclined support rod and the rear inclined support rod enclose a triangular support frame at the top of the column; a fixing component is provided on the column to prevent the triangular support frame from rotating around the column, and the fixing component is connected to the triangular support frame; the two ends of the purlin are respectively connected to the triangular support frames on the two adjacent columns, and the photovoltaic panel is fixed on the purlin.

[0006] Preferably, the fixing assembly includes a flange end plate, a cross arm and a hoop; the flange end plate is fitted and connected to the top of the column; the cross arm is horizontally placed on the flange end plate and fixed by an angle code; the hoop is sleeved on the column, and the two sides of the hoop are respectively connected to the bottom ends of the front and rear vertical poles; the middle parts of the front and rear vertical poles are respectively connected to the two ends of the cross arm, and the top ends of the front and rear vertical poles are respectively connected to the middle parts of the diagonal beam.

[0007] Preferably, the angle bracket is an adjustable angle bracket with an adjustable connection angle, and the angle bracket is fixed to the flange end plate by an adjustable bolt.

[0008] Preferably, it also includes a rear belly member and a front belly member; one end of the front belly member is connected to the middle part of the diagonal beam, and the other end is connected to the middle part of the front diagonal support rod; one end of the rear belly member is connected to the middle part of the diagonal beam, and the other end is connected to the middle part of the rear diagonal support rod; the angle between the rear belly member and the rear vertical rod is less than 90 degrees; the angle between the front belly member and the front vertical rod is less than 90 degrees.

[0009] Preferably, it further includes a cable and an anti-torsion connecting plate; the two ends of the cable are respectively connected to the oblique beams on two adjacent columns, and at least two mutually crossing cables are provided between the two adjacent columns; the anti-torsion connecting plate is provided at the bottom of the purlin.

[0010] Preferably, the crossarms, front uprights, rear uprights, front diagonal braces, rear diagonal braces, front web members, rear web members, diagonal beams, purlins, and torsion-resistant connecting plates are all made of composite materials; the columns are precast concrete pipe piles, cast-in-place concrete columns, or steel columns; the flange end plates are made of steel; and the clamps and angle brackets are made of steel or composite materials.

[0011] Preferably, the components in the composite material are blended and then prepared by a heat curing pultrusion process, and the tensile, compressive and flexural elastic moduli of the prepared composite material are 40-75 GPa.

[0012] Preferably, the mass fraction percentages of the components of the composite material are as follows: glass fiber or basalt fiber is 60-90%; resin composite matrix is ​​10-40%.

[0013] Preferably, the mass fraction percentages of the glass fiber components are as follows: glass fiber roving is 70-90%; glass fiber mat is 10-30% or basalt fiber mat is 0-30%;

[0014] The mass fraction percentages of the components of the resin composite matrix are specifically as follows: modified epoxy resin and its curing agent are 75-85%; inorganic filler powder is 5-10%; additives are 5-10%; and color paste is 0-5%.

[0015] Preferably, the mass fraction percentages of the additive components are as follows: UV additive 20-40%; anti-aging agent 0-20%, initiator 10-20%, release agent 20-30%, functional thermoplastic resin particles 20-30%; the inorganic filler powder is any one or more of calcium carbonate, silicon carbide, ceramic powder, magnesium oxide, zirconium oxide, aluminum hydroxide, titanium dioxide, and silicon dioxide.

[0016] The beneficial effects of the invention are embodied in:

[0017] (1) The photovoltaic bracket provided by the present invention adopts a unique adaptive connection method of cross arms, angle brackets and flange end plates, which solves the problem of column top deflection and forms a combination of column top bolt connection and column body sleeve connection, thereby improving the stability and safety of the structure.

[0018] (2) The photovoltaic bracket provided by the present invention adopts fiber composite materials, which are light in weight and high in strength, resistant to aging and corrosion, easy to produce and install, and suitable for use in deserts, mudflats, mountains and other environments. It is easy for one person to manually place and install it, effectively reducing the construction difficulty and maintenance cost in special environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a side view of the structure of the present invention;

[0021] Figure 3 It is a partial structural schematic diagram of the fixing assembly of the present invention.

[0022] Description of reference numerals:

[0023] A. Photovoltaic panels; 10. Columns; 21. Flange end plates; 22. Angle brackets; 23. Cross arms; 24. Hoops; 25. Front vertical poles; 26. Rear vertical poles; 31. Diagonal beams; 32. Rear diagonal braces; 33. Front diagonal braces; 41. Rear web members; 42. Front web members; 51. Cables; 60. Purlins; 61. Torsion-resistant connecting plates. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the embodiments described are only part of the embodiments of the invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0025] Example 1

[0026] See also Figure 1-3 As shown:

[0027] The invention provides a composite photovoltaic bracket for sandy and tidal flat areas and a composite material manufacturing method thereof, comprising: a column 10, an inclined beam 31, a front inclined support rod 33, a rear inclined support rod 32 and a purlin 60.

[0028] The column 10 is erected in the installation area of ​​the photovoltaic panel A. The column 10 is made of a precast concrete pipe pile, a cast-in-place concrete column or a steel column.

[0029] The diagonal beam 31 is arranged obliquely above the column 10; the front diagonal support rod 33 and the rear diagonal support rod 32 are respectively arranged on both sides of the column 10 and connected to the column 10, and the diagonal beam 31, the front diagonal support rod 33 and the rear diagonal support rod 32 enclose a triangular support frame at the top of the column 10.

[0030] A fixing assembly is provided on the column 10 to prevent the triangular support frame from rotating around the column 10 , and the fixing assembly is connected to the triangular support frame.

[0031] The fixing assembly mainly consists of a flange end plate 21 , a cross arm 23 and a clamp 24 .

[0032] During installation, the flange end plate 21 is bolted to the top of the column 10, and the cross arm 23 is placed horizontally on the flange end plate 21 and fixed to the angle bracket 22 via bolts. The angle bracket 22 is fixed to the flange end plate 21 via adjustable bolts. The structure of the angle bracket 22 is a commonly used adjustable angle bracket on the market. That is, the connection point and connection angle between the angle bracket 22 and the flange end plate 21 can be adjusted, generally achieved by adjusting the bolts and bolt holes with fixed adjustment positions.

[0033] When the flange end plate 21 is at any rotation angle caused by inaccurate piling of the column 10, the bolts connecting the angle bracket 22 and the cross arm 23 can be adjusted, and the bolts connecting the angle bracket 22 and the flange end plate 21 can be adjusted. By adjusting the bolts at the two places, the relative positions of the cross arm 23, the angle bracket 22 and the flange end plate 21 can be adjusted to overcome the deflection angle of the column 10 in the vertical direction.

[0034] The clamp 24 is mounted on the column 10, and the two sides of the clamp 24 are connected to the bottom ends of the front and rear uprights 25 and 26 respectively. The middle parts of the front and rear uprights 25 and 26 are connected to the ends of the cross arm 23 respectively, and the top ends of the front and rear uprights 25 and 26 are connected to the middle parts of the diagonal beam 31. The front diagonal brace 33 is connected to the front upright 25, and the rear diagonal brace 32 is connected to the rear upright 26.

[0035] With such an arrangement, the triangular support frame is further divided into two small triangular structures inside under the action of the front upright pole 25 and the rear upright pole 26, thereby further improving the stability of the structure.

[0036] The frame also includes a rear web member 41 and a front web member 42. One end of the front web member 42 is connected to the middle of the diagonal beam 31, and the other end is connected to the middle of the front diagonal brace 33. One end of the rear web member 41 is connected to the middle of the diagonal beam 31, and the other end is connected to the middle of the rear diagonal brace 32. The angle between the rear web member 41 and the rear upright 26 is less than 90 degrees; the angle between the front web member 42 and the front upright 25 is less than 90 degrees.

[0037] The two small triangular structures inside the triangular support frame are further divided into two smaller triangular structures by the rear web 41 and the front web 42, thereby further improving the stability of the structure.

[0038] Both ends of the purlin 60 are respectively connected to the triangular support frames on the two adjacent columns 10 , that is, both ends of the purlin 60 are respectively connected to the oblique beams 31 on the two adjacent columns 10 .

[0039] In specific applications, two adjacent diagonal beams 31 are connected by at least four purlins 60, thereby being able to form a uniform support for the photovoltaic panels A fixed on the purlins 60. In order to increase the torsion resistance of the purlins 60, anti-torsion connecting plates 61 are provided at the bottom of the purlins 60.

[0040] To prevent the triangular support frames on two adjacent columns 10 from shaking when the wind blows on the photovoltaic panels A, at least two intersecting cables 51 are installed between the two adjacent columns 10. The ends of the cables 51 are respectively connected to the ends of the diagonal beams 31 on the two adjacent columns 10. As a result, the triangular support frames on the two adjacent columns 10 are more integrated due to the connection between the cables 51 and the purlins 60.

[0041] The crossarm 23, the front vertical pole 25, the rear vertical pole 26, the front diagonal brace 33, the rear diagonal brace 32, the front web member 42, the rear web member 41, the diagonal beam 31, the purlin 60, and the torsion-resistant connecting plate 61 are all made of composite materials; the flange end plate 21 is made of steel; the hoop 24 and the angle code 22 are made of steel or composite materials.

[0042] Example 2

[0043] As can be seen from the above embodiment 1, most of the brackets for mounting and fixing the photovoltaic panel A are made of composite materials. The mass fraction percentages of the composite materials are as follows: glass fiber or basalt fiber is 60-90%; resin composite matrix is ​​10-40%.

[0044] The mass fraction percentages of the glass fiber components are as follows: glass fiber roving is 70-90%; glass fiber mat is 10-30% or basalt fiber mat is 0-30%.

[0045] The mass fraction percentages of the components of the resin composite matrix are specifically as follows: modified epoxy resin and its curing agent are 75-85%; inorganic filler powder is 5-10%; additives are 5-10%; and color paste is 0-5%.

[0046] The mass fraction percentages of each component of the additive are specifically as follows: UV additive 20-40%; anti-aging agent 0-20%, initiator 10-20%, release agent 20-30%, functional thermoplastic resin particles 20-30%; the inorganic filler powder is any one or more of calcium carbonate, silicon carbide, ceramic powder, magnesium oxide, zirconium oxide, aluminum hydroxide, titanium dioxide, and silicon dioxide.

[0047] In practical applications, the components in the composite material are blended and then prepared through a heat curing pultrusion process, and the tensile, compressive and bending elastic moduli of the prepared composite material are 40-75GPa.

[0048] The resulting composite materials were tested for density, tensile strength / modulus, compressive strength / modulus, flexural strength / modulus, punching shear strength, and interlaminar shear strength according to GB / T 1463-2005 "Fiber-reinforced Plastics - Test Method for Density and Relative Density," GB / T 1447-2005 "Fiber-reinforced Plastics - Test Method for Tensile Properties," GB / T 1448-2005 "Fiber-reinforced Plastics - Test Method for Compression-Tension Properties," GB / T 1449-2005 "Fiber-reinforced Plastics - Test Method for Flexural Properties," GB / T 1450.2-2005 "Fiber-reinforced Plastics - Test Method for Punching Shear Strength," and JC / T 773-2010 "Fiber-reinforced Plastics - Determination of Interlaminar Shear Strength by the Short-Beam Method." Five control groups were set up for testing, and the average of the test results from these five control groups was used as the final value, resulting in the table below.

[0049] Composite material performance test table

[0050]

[0051] It can be seen from the data in the above table that the composite material obtained by the present invention is a low-cost, lightweight, high-strength, corrosion-resistant, aging-resistant, and thermally insulating material, which can be suitable for the requirements of the use scenarios of the photovoltaic bracket of the present invention, that is, the photovoltaic bracket with high requirements on self-weight, strength, corrosion resistance, insulation, thermal insulation, and life in the present invention can be manufactured, which can solve the problems of gravel erosion in windy and sandy areas and salt spray erosion suffered by traditional photovoltaic brackets in tidal flat environments. In addition, the photovoltaic bracket made of composite materials has low later maintenance costs and less safety hazards, and has a strong prospect for application and promotion.

[0052] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0053] The above are only preferred embodiments of the invention and are not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the invention should be included in the scope of protection of the invention.

Claims

1. A composite photovoltaic support for sandy and tidal flat areas, characterized in that: include: A column (10), an oblique beam (31), a front oblique support rod (33), a rear oblique support rod (32) and a purlin (60); the column (10) is erected in the installation area of ​​the photovoltaic panel (A); the oblique beam (31) is arranged obliquely above the column (10); the front oblique support rod (33) and the rear oblique support rod (32) are respectively arranged on both sides of the column (10) and connected to the column (10), and the oblique beam (31), the front oblique support rod (33) and the rear oblique support rod (32) enclose a triangular support frame at the top of the column (10); a fixing component is provided on the column (10) to prevent the triangular support frame from rotating around the column (10), and the fixing component is connected to the triangular support frame; the two ends of the purlin (60) are respectively connected to the triangular support frames on two adjacent columns (10), and the photovoltaic panel (A) is fixed on the purlin (60); The fixing assembly comprises a flange end plate (21), a cross arm (23) and a hoop (24); the flange end plate (21) is fitted and connected to the top end of the column (10); the cross arm (23) is horizontally placed on the flange end plate (21) and fixed by an angle code (22); the hoop (24) is sleeved on the column (10), and both sides of the hoop (24) are respectively connected to the bottom ends of the front vertical rod (25) and the rear vertical rod (26); the middle parts of the front vertical rod (25) and the rear vertical rod (26) are respectively connected to the two ends of the cross arm (23), and the top ends of the front vertical rod (25) and the rear vertical rod (26) are respectively connected to the middle parts of the oblique beam (31); The angle bracket (22) is an adjustable angle bracket with an adjustable connection angle, and the angle bracket (22) and the flange end plate (21) are fixed by adjustable bolts; It also includes a cable (51) and a torsion-resistant connecting plate (61); both ends of the cable (51) are respectively connected to the inclined beam rods (31) on two adjacent columns (10), and at least two mutually intersecting cables (51) are provided between the two adjacent columns (10); the torsion-resistant connecting plate (61) is provided at the bottom of the purlin (60); The cross arm (23), front vertical rod (25), rear vertical rod (26), front diagonal brace (33), rear diagonal brace (32), front web member (42), rear web member (41), diagonal beam (31), purlin (60), and torsion-resistant connecting plate (61) are all made of composite materials; the column (10) is a precast concrete pipe pile, a cast-in-place concrete column, or a steel column; the flange end plate (21) is made of steel; the hoop (24) and the angle bracket (22) are made of steel or composite materials; The mass fraction percentages of the components of the composite material are specifically as follows: glass fiber or basalt fiber is 60-90%; resin composite matrix is ​​10-40%; The mass fraction percentages of the glass fiber components are specifically as follows: glass fiber roving is 70-90%; glass fiber mat is 10-30% or basalt fiber mat is 0-30%; The mass fraction percentages of the components of the resin composite matrix are specifically as follows: modified epoxy resin and its curing agent are 75-85%; inorganic filler powder is 5-10%; additives are 5-10%; and color paste is 0-5%.

2. The composite photovoltaic support for sandy and tidal flat areas according to claim 1, characterized in that: The invention also includes a rear belly bar (41) and a front belly bar (42); one end of the front belly bar (42) is connected to the middle part of the diagonal beam bar (31), and the other end is connected to the middle part of the front diagonal support bar (33); one end of the rear belly bar (41) is connected to the middle part of the diagonal beam bar (31), and the other end is connected to the middle part of the rear diagonal support bar (32); the angle between the rear belly bar (41) and the rear vertical bar (26) is less than 90 degrees; the angle between the front belly bar (42) and the front vertical bar (25) is less than 90 degrees.

3. The method for preparing a composite material for a composite material photovoltaic support in sandy and tidal flat areas according to any one of claims 1-2, characterized in that: The components in the composite material are blended and prepared through a heat curing pultrusion process, and the tensile, compressive and bending elastic moduli of the prepared composite material are 40-75 GPa.

4. The method for preparing a composite material for a composite material photovoltaic support in sandy and tidal flat areas according to claim 3, characterized in that: The mass fraction percentages of the additive components are specifically as follows: anti-ultraviolet additive 20-40%; anti-aging agent 0-20%, initiator 10-20%, release agent 20-30%, functional thermoplastic resin particles 20-30%; the inorganic filler powder is any one or more of calcium carbonate, silicon carbide, ceramic powder, magnesium oxide, zirconium oxide, silicon dioxide, aluminum hydroxide, and titanium dioxide.

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