Composite material photovoltaic support used in windy and sandy areas and beach areas and composite material manufacturing method of composite material photovoltaic support

Abstract

The invention relates to the technical field of photovoltaic supports, in particular to a composite material photovoltaic support for wind-blown sand and mud flat areas and a composite material manufacturing method of the composite material photovoltaic support. Comprising stand columns, inclined beam rods, front inclined supporting rods, rear inclined supporting rods and purlines. The stand column is vertically arranged in an installation area of the photovoltaic panel. The oblique beam rod is obliquely arranged above the stand column; the front inclined supporting rod and the rear inclined supporting rod are arranged on the two sides of the stand column respectively and connected with the stand column, and a triangular supporting frame is defined by the inclined beam rod, the front inclined supporting rod and the rear inclined supporting rod at the top end of the stand column. The stand column is provided with a fixing assembly for preventing the triangular supporting frame from rotating around the stand column, and the fixing assembly is connected with the triangular supporting frame. The two ends of each purline are connected with the triangular supporting frames on the two adjacent stand columns respectively, and the photovoltaic panels are fixed to the purlines. A photovoltaic support made of the prepared composite material can reduce the self weight of the support and improve the corrosion resistance, and can be installed in special environments such as deserts and mud flats.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic brackets, and in particular to a composite photovoltaic bracket for sandstorm 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, but when building photovoltaics in special environments such as deserts and tidal flats, conventional steel structure brackets have a large deadweight and are difficult to install. It is also difficult to solve the problems of gravel erosion in windy and sandy areas and salt spray erosion in tidal flat environments. The later maintenance costs are high and there are great safety hazards. Therefore, single-column forms are mainly used in desert and tidal flat environments 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 avoid the problem of column top offset and deflection. However, this type of connection method that relies on friction has poor stability and reliability, and fails to give full play to the axial force advantages of concrete columns and the role of flange end plates. Therefore, it is urgent to solve this problem.

[0003] The above contents are only used to assist in understanding the technical solution of the invention and do not constitute an admission that the above contents are 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 sandstorm 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, and can be installed in special environments such as deserts and tidal flats. The photovoltaic bracket also solves the problem of column angle deflection, thereby improving stability and safety in use.

[0005] To achieve the above-mentioned purpose, the technical scheme of the invention is implemented as follows: a composite material photovoltaic bracket for sandstorm and tidal flat areas and a composite material manufacturing method thereof, comprising: a column, an inclined beam, a front inclined brace, a rear inclined brace and a purlin; the column is erected in the installation area of ​​the photovoltaic panel; the inclined beam is obliquely arranged above the column; the front inclined brace and the rear inclined brace are respectively arranged on both sides of the column and connected to the column, and the inclined beam, the front inclined brace and the rear inclined brace 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 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 uprights; the middle parts of the front and rear uprights are respectively connected to the two ends of the cross arm, and the top ends of the front and rear uprights 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 and the flange end plate are fixed by adjustable bolts.

[0008] Preferably, it also includes a rear belly bar and a front belly bar; one end of the front belly bar 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 bar; one end of the rear belly bar 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 bar; the angle between the rear belly bar and the rear vertical bar is less than 90 degrees; the angle between the front belly bar and the front vertical bar is less than 90 degrees.

[0009] Preferably, it also includes a cable and a torsion-resistant connecting plate; the two ends of the cable are respectively connected to the oblique beams on two adjacent columns, and at least two mutually intersecting cables are provided between the two adjacent columns; the torsion-resistant connecting plate is arranged 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 bending 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 percentage of each component of the additive is 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, silicon dioxide, 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, forms a combination of column top bolt connection and column body sleeve connection, and improves the stability and safety of the structure.

[0018] (2) The photovoltaic bracket provided by the present invention adopts a fiber composite material, which is light in weight and high in strength, resistant to aging and corrosion, easy to produce and install, and suitable for use in deserts, tidal flats, 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 structural side view 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 uprights; 26. Rear uprights; 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 described embodiments 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 in 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 sandstorm and tidal flat areas and a composite material manufacturing method thereof, comprising: a column 10, an inclined beam 31, a front inclined brace 33, a rear inclined brace 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 prefabricated concrete pipe pile, a cast-in-place concrete column or a steel column.

[0029] The inclined 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 inclined 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.

[0030] 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.

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

[0032] During specific installation, the flange end plate 21 and the top of the column 10 are fitted together by bolts, and the cross arm 23 is horizontally placed on the flange end plate 21 and fixed to the angle bracket 22 by bolts. The angle bracket 22 and the flange end plate 21 are fixed by adjustable bolts, and the structure of the angle bracket 22 is an adjustable angle bracket with adjustable connection angle commonly used in the market, that is, the connection point and connection angle between the angle bracket 22 and the flange end plate 21 can be adjusted, which is generally achieved by adjusting bolts and bolt holes with certain adjustment positions.

[0033] When the flange end plate 21 is at any rotation angle caused by inaccurate piling of the column 10, the bolts used to connect the angle code 22 and the cross arm 23 can be adjusted, and the bolts used to connect the angle code 22 and the flange end plate 21 can be adjusted. By adjusting the bolts at the two locations, the relative positions of the cross arm 23, the angle code 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 hoop 24 is mounted on the column 10, and the two sides of the hoop 24 are respectively connected to the bottom ends of the front upright rod 25 and the rear upright rod 26; the middle parts of the front upright rod 25 and the rear upright rod 26 are respectively connected to the two ends of the cross arm 23, and the top ends of the front upright rod 25 and the rear upright rod 26 are respectively connected to the middle parts of the diagonal beam rod 31. The front diagonal brace rod 33 is connected to the front upright rod 25, and the rear diagonal brace rod 32 is connected to the rear upright rod 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] It 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 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 belly bar 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 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.

[0037] The two small triangular structures inside the triangular support frame are further divided into two smaller triangular structures by the rear web bar 41 and the front web bar 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 inclined beams 31 on the two adjacent columns 10 .

[0039] In specific application, two adjacent inclined beams 31 are connected by at least four purlins 60, so as to form a uniform support for the photovoltaic panels A fixed on the purlins 60. In order to increase the anti-torsion ability of the purlins 60, an anti-torsion connecting plate 61 is provided at the bottom of the purlins 60.

[0040] In order to prevent the triangular support frames on two adjacent columns 10 from shaking when the photovoltaic panel A is blown by wind, at least two mutually intersecting cables 51 are provided between the two adjacent columns 10. The two ends of the cable 51 are respectively connected to the ends of the inclined beam rods 31 on the two adjacent columns 10, so that the triangular support frames on the two adjacent columns 10 are better integrated under the connection of the cable 51 and the purlin 60.

[0041] The cross arm 23, the front vertical rod 25, the rear vertical rod 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 anti-torsion 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 components of the composite materials are specifically: glass fiber or basalt fiber is 60-90%; resin composite matrix is ​​10-40%.

[0044] The mass fraction percentage of each component of the glass fiber is specifically as follows: the glass fiber roving is 70-90%; the glass fiber mat is 10-30% or the basalt fiber mat is 0-30%.

[0045] The specific mass fraction percentages of the components of the resin composite matrix are: 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 percentage of each component of the additive is specifically as follows: 20-40% of ultraviolet additive; 0-20% of anti-aging agent, 10-20% of initiator, 20-30% of release agent, 20-30% of functional thermoplastic resin particles; the inorganic filler powder adopts any one or more of calcium carbonate, silicon carbide, ceramic powder, magnesium oxide, zirconium oxide, silicon dioxide, 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 40-75 Gpa.

[0048] For the obtained composite materials, according to GB / T 1463-2005 "Fiber reinforced plastic density and relative density test method", GB / T 1447-2005 "Fiber reinforced plastic tensile performance test method", GB / T 1448-2005 "Fiber reinforced compression tensile performance test method", GB / T 1449-2005 "Fiber reinforced plastic bending performance test method", GB / T 1450.2-2005 "Fiber reinforced plastic punching shear strength test method", JC / T 773-2010 "Fiber reinforced plastic short beam method for interlaminar shear strength" to test its density, tensile strength / modulus, compressive strength / modulus, bending strength / modulus. Punching shear strength, interlaminar shear strength were tested. In the specific test, five groups of test control groups were set, and the average value of the test results of the five groups of test control groups was taken as the final value, and the following table was obtained.

[0049] Composite material performance test table

[0050]

[0051]

[0052] 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, and the problems of gravel erosion in sandy areas and salt spray erosion of traditional photovoltaic brackets in tidal flat environments can be solved. In addition, the photovoltaic bracket made of composite materials has low later maintenance costs and less potential safety hazards, and has a strong prospect for application and promotion.

[0053] 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 used for descriptive purposes and cannot be understood as indicating or implying 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 the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. 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 ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0054] 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 protection scope of the invention.

Claims

1. A composite photovoltaic bracket for sandy and tidal flat areas, characterized in that: include: A column (10), an inclined beam (31), a front inclined brace (33), a rear inclined brace (32) and a purlin (60); the column (10) is erected in the installation area of ​​the photovoltaic panel (A); the inclined beam (31) is arranged obliquely above the column (10); the front inclined brace (33) and the rear inclined brace (32) are respectively arranged on both sides of the column (10) and connected to the column (10), and the inclined beam (31), the front inclined brace (33) and the rear inclined brace (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).

2. A composite photovoltaic support for sandy and tidal flat areas according to claim 1, characterized in that: 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 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 the two sides of the hoop (24) are respectively connected to the bottom ends of the front upright pole (25) and the rear upright pole (26); the middle parts of the front upright pole (25) and the rear upright pole (26) are respectively connected to the two ends of the cross arm (23), and the top ends of the front upright pole (25) and the rear upright pole (26) are respectively connected to the middle parts of the inclined beam (31).

3. A composite photovoltaic support for sandy and tidal flat areas according to claim 2, characterized in that: 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.

4. A composite photovoltaic support for sandy and tidal flat areas according to claim 2 or 3, characterized in that: It 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.

5. A composite photovoltaic support for sandy and tidal flat areas according to claim 4, characterized in that: It also includes a cable (51) and an anti-torsion connecting plate (61); the two 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 arranged between the two adjacent columns (10); the anti-torsion connecting plate (61) is arranged at the bottom of the purlin (60).

6. The composite photovoltaic support for sandy and tidal flat areas according to claim 5, characterized in that: The cross arm (23), the front upright (25), the rear upright (26), the front diagonal brace (33), the rear diagonal brace (32), the front web (42), the rear web (41), the diagonal beam (31), the purlin (60), and the anti-torsion connecting plate (61) are all made of composite materials; the upright 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; and the hoop (24) and the angle bracket (22) are made of steel or composite materials.

7. A 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 to 6, characterized in that: The components in the composite material are blended and prepared by a heat curing pultrusion process, and the tensile, compressive and bending elastic moduli of the prepared composite material are 40-75 GPa.

8. The method for preparing a composite material for a composite material photovoltaic support in sandy and tidal flat areas according to claim 7, characterized in that: The mass fraction percentages of the components of the composite material are specifically as follows: glass fiber or basalt fiber is 60-90%; and resin composite matrix is ​​10-40%.

9. The method for preparing a composite material for a composite material photovoltaic support in sandy and tidal flat areas according to claim 8, characterized in that: 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%; 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%.

10. The method for preparing a composite material for a composite material photovoltaic support in sandy and tidal flat areas according to claim 9, characterized in that: The mass fraction percentages of the additive components are specifically as follows: 20-40% of anti-ultraviolet additives; 0-20% of anti-aging agents, 10-20% of initiators, 20-30% of release agents, and 20-30% of functional thermoplastic resin particles; the inorganic filler powder is any one or more of calcium carbonate, silicon carbide, ceramic powder, magnesium oxide, zirconium oxide, silicon dioxide, aluminum hydroxide, titanium dioxide, and silicon dioxide.

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