Novel composite material tracking type photovoltaic frame

Abstract

The invention discloses a novel composite material tracking type photovoltaic frame which comprises a stand column, a structural beam, a driving unit and a photovoltaic panel, the stand column, the structural beam and all connecting pieces are made of fiber reinforced composite materials with the same formula, the materials take ECR glass fiber twistless roving treated by a double-silane coupling agent as reinforcing bodies, and the driving unit is connected with the driving unit. Isophthalic unsaturated polyester resin is used as a matrix, and an anti-UV agent, a low shrinkage agent and a weather-resistant filler are added. A special-shaped section insertion design is adopted structurally, one end of a structural beam is inserted into a second driving side connecting piece, and the other end of the structural beam is inserted into a round hole of a third driven side connecting piece, so that bearing-free rotation is realized; the photovoltaic panel is installed through a hoop type detachable structure. The device has the advantages of light weight, no corrosion prevention in the whole life cycle, no galvanic corrosion, convenience in installation and maintenance, high tracking precision, environmental protection, recoverability and the like, and is suitable for high-humidity, coastal and other harsh environments.

Description

Technical Field

[0001] This invention relates to a novel composite material tracking photovoltaic frame. Background Technology

[0002] Currently, tracking photovoltaic (PV) mounting systems generally use steel structures, which, while having strong load-bearing capacity, have the following prominent problems:

[0003] Corrosion problem: Steel exposed to high humidity, salt spray, acid and alkali environments for a long time is prone to electrochemical corrosion, requiring regular hot-dip galvanizing or spraying of anti-corrosion coating, resulting in high maintenance costs.

[0004] Heavy weight and high construction costs: The large weight of steel components increases the requirements for transportation, hoisting and foundation bearing capacity, resulting in a high proportion of transportation and installation costs in the total investment of the system.

[0005] Poor compatibility of materials: In traditional solutions, columns, beams, and connectors are often made of different metals or metal-composite materials. Potential differences cause galvanic corrosion, reducing connection reliability and overall lifespan.

[0006] Tracking accuracy and maintenance difficulty: The steel structure drive part requires additional bearings and seals. After long-term operation, corrosion and wear lead to increased gaps, decreased tracking accuracy, short maintenance cycle and long downtime.

[0007] Material recycling and environmental pressure: After the steel structure reaches the end of its service life, it needs to be derusted and remelted, which consumes a lot of energy; moreover, the zinc coating contains harmful elements, the recycling process is complicated, and the environmental pressure is great.

[0008] Therefore, developing a lightweight, corrosion-resistant, homogeneous, modular composite photovoltaic bracket capable of high-precision tracking, while ensuring structural strength, stiffness, and a 25-year service life, has become a pressing technical challenge for the industry. (Invention Content)

[0009] The present invention provides a novel composite material tracking photovoltaic frame to solve the problems existing in the prior art.

[0010] The technical solutions adopted in this invention are as follows:

[0011] A novel composite material tracking photovoltaic frame includes columns, structural beams, a drive unit, and photovoltaic panels. The drive unit is fixed to the column to drive the structural beam to rotate. Several photovoltaic panels are fixed to the structural beam. The columns and structural beams are made from the same raw materials, which, by weight, include:

[0012] 67-75 parts of ECR ​​glass fiber untwisted roving treated with bissilane coupling agent;

[0013] 0.2-0.3 parts of methyl ethyl ketone peroxide;

[0014] Cobalt salt accelerator: 0.1–0.3 parts;

[0015] 0.05–0.15 parts of diethylaniline;

[0016] 20-30 parts of composite felt composed of needle-punched chopped strand mat and surface mat;

[0017] 0.2-0.8 parts of polyester surface felt;

[0018] 0.5-0.7 parts of low-shrinkage agent;

[0019] 10-15 parts of filler;

[0020] UV protectant 0.05-0.07 parts;

[0021] 20-30 parts of isophthalic unsaturated polyester resin;

[0022] 0.4-0.6 parts of pigment paste;

[0023] 0.5–0.7 parts release agent.

[0024] Further, the methyl ethyl ketone peroxide is a solution with a mass fraction of 40% to 55%, the amount of the cobalt salt accelerator is 0.1–0.3 parts, and the amount of the diethylaniline accelerator is 0.05–0.15 parts.

[0025] Furthermore, the basis weight of needle-punched chopped strand mat is 450 g / m². 2 Thickness 3mm, surface felt weight 20~30g / m² 2 The volume ratio of needle-punched chopped strand mat to surface mat is 1:1.

[0026] Furthermore, the low-shrinkage agent is a styrene-maleic anhydride copolymer, an acrylic acid graft copolymer, or a polystyrene-based thermoplastic low-shrinkage agent.

[0027] Furthermore, the UV stabilizer is composed of a hindered amine light stabilizer and / or a benzotriazole UV absorber, wherein the amount of the hindered amine light stabilizer is 0.02–0.05 parts and the amount of the benzotriazole UV absorber is 0.03–0.07 parts.

[0028] Furthermore, the release agent is a semi-permanent polysiloxane release agent with a solid content of 15%–30%.

[0029] Furthermore, the filler is one or a combination of two or more of nano-silica, precipitated calcium carbonate, and aluminum hydroxide;

[0030] The pigment paste is a weather-resistant inorganic pigment paste, which is either a titanium dioxide white pigment paste or an iron oxide-based pigment paste.

[0031] Furthermore, it also includes a first connector, a second connector, and a third connector. The materials of the first, second, and third connectors are the same as those of the columns and structural beams. Two columns are provided. The drive unit is fixed to one of the columns through the first connector. The third connector is fixedly connected to the other column. One end of the structural beam is fixed to the second connector, and the other end is inserted into the third connector. The second connector is fixed to the output end of the drive unit.

[0032] Furthermore, the drive unit includes a motor and a gearbox. The gearbox is fixed to the first connecting member. The gearbox has two output ends and one input end. The motor shaft is connected to the input end. The two output ends are respectively fixed to the second connecting member.

[0033] Furthermore, the structural beam is plugged and fixed to the second connector, and the cross-sections of the two are adapted to each other. The cross-section includes three straight segments and three concentrically arranged circular arc segments, of which two straight segments are arranged symmetrically, two circular arc segments are arranged symmetrically, and the remaining straight segment and one circular arc segment are arranged opposite each other. The arc length of the oppositely arranged circular arc segment is greater than the arc length of the symmetrically arranged circular arc segment; the length of the oppositely arranged straight segment is less than the length of the symmetrically arranged straight segment.

[0034] Furthermore, the third connector is provided with a plug-in circular hole, and the structural beam is plugged into the plug-in circular hole. When the structural beam is driven to rotate by the driving unit, the arc segment in the structural beam rotates in contact with the arc surface of the plug-in circular hole.

[0035] Furthermore, the first connector is a right-angled block structure.

[0036] Furthermore, the photovoltaic panel and the structural beam are detachable, and the detachable structure includes a mounting plate and a clamp. The mounting plate is fixed to the structural beam by the clamp, and adjacent photovoltaic panels are fixed to the mounting plate by bolts.

[0037] The present invention has the following beneficial effects:

[0038] (1) All columns, structural beams and connectors are made of pultruded composite materials, which are lightweight and do not require large machinery for hoisting, thus reducing transportation and installation costs.

[0039] (2) Composite system of the same material (without metal inserts), there is no potential difference between components, the surface is rich in resin layer with weather resistance barrier, and there is no need for hot galvanizing or regular anti-corrosion coating in coastal and high humidity areas.

[0040] (3) The columns, beams and connectors are all made of the same composite formula. The drive unit and the composite material are isolated by an insulating gasket to completely avoid galvanic corrosion caused by contact between different metals or metal-composite materials, improve the reliability of the connection parts, and address the defect of "corrosion caused by potential difference of mixed materials" in the background technology.

[0041] (4) The structural beam and the second connector adopt a “three straight segments + three circular arc segments” irregular plug-in connection, and the photovoltaic panel is installed with a clamp. No welding or drilling is required on site. A single person can insert and lock it. When replacing the photovoltaic panel, only the clamp bolts need to be loosened. The maintenance time is short, which solves the disadvantage of “steel structure maintenance requires hot work and long downtime”.

[0042] (5) The dual-output geared motor drives two structural beams simultaneously. The composite material beams have built-in shock absorption and damping, small synchronization error, low operating noise, and require no lubrication or rust removal.

[0043] (6) After the overall weight reduction, the windward area of ​​the support and the seismic action are reduced, and the amount of foundation concrete is reduced; the composite profile can be pultruded in one go without joints for 12m, reducing transportation energy consumption and directly reducing carbon emissions in civil engineering and logistics.

[0044] (7) The thermosetting polyester system is adopted. After the service life, it can be crushed and reused as filler. The pultrusion molding temperature is ≤160℃. The processing energy consumption is lower than that of steelmaking and rolling. The recycling process is simple and does not require high-temperature smelting, which alleviates the environmental burden of traditional galvanized steel, which has "high recycling energy consumption and difficult waste acid treatment". Attached Figure Description

[0045] Figure 1 This is a structural diagram of the present invention.

[0046] Figure 2 for Figure 1 Structure diagram after removing the photovoltaic panels.

[0047] Figure 3 For columns, structural beams, drive units and connectors

[0048] Figure 4 This is a cross-sectional view of the structural beam and the second connecting member.

[0049] Figure 5 This is an assembly drawing of the photovoltaic panels and structural beams.

[0050] Figure 6 This is a flowchart of the composite material preparation process. Detailed Implementation

[0051] The invention will now be further described with reference to the accompanying drawings.

[0052] like Figure 1-3 The present invention discloses a novel composite material tracking photovoltaic frame, comprising a column 1, a structural beam 2, a drive unit 3, a photovoltaic panel 4, a first connector 51, a second connector 52, a third connector 53, and a detachable installation structure (61, 62).

[0053] The connectors are the core of ensuring structural stability. The first connector 51, the second connector 52, and the third connector 53 are made of the same material as the columns and structural beams to ensure that the strength of the connection parts is not lower than that of the main structure, thus avoiding overall failure caused by "weak links".

[0054] Among them, column 1, structural beam 2, and first connector 51, second connector 52, and third connector 53 are all made of fiber-reinforced composite material with the same proportion, ensuring the overall material compatibility, strength matching, and corrosion resistance of the structure from the source, and avoiding stress unevenness or electrochemical corrosion problems caused by the connection of different materials. The preparation process of this composite material is as follows:

[0055] First, fiber pretreatment is performed:

[0056] High-modulus ECR glass fiber roving with a linear density of 2400-9600 tex was used as the reinforcement. The glass fiber was first sprayed with an aqueous solution of γ-aminopropyltriethoxysilane (APS), and then impregnated in a mixed aqueous solution of γ-glycidyl etheroxypropyltrimethoxysilane (KH560) and GPTMS to allow the epoxy and amino groups on the fiber surface to react synergistically, thereby increasing the interlaminar shear strength (ILSS) by ≥20%. The treated glass fiber was then dried at 110℃±5℃ for 5-10 minutes, with the moisture content controlled to ≤0.2%, and was ready for use.

[0057] Resin preparation system:

[0058] Using 20-30 parts of low-viscosity, outdoor-grade, weather-resistant isophthalic unsaturated polyester resin as the matrix, nano-SiO2 and CaCO3 were added to KH560 at a mass ratio of 1:2. The mixture was dispersed at high speed (300-600 rpm) under conditions ≤30℃ to obtain 10-15 parts of surface-activated mixed filler. Then, 0.5-0.7 parts of a low-shrinkage agent (which is a styrene-maleic anhydride copolymer, acrylic graft copolymer, or polystyrene thermoplastic low-shrinkage agent) and 0.05-0.07 parts of a UV stabilizer (composed of hindered amine light stabilizer and / or benzotriazole UV absorber, with the hindered amine light stabilizer used in amounts of 0.02–0.05 parts) were added sequentially to the matrix. The following components are added: 0.03–0.07 parts of benzotriazole UV absorber, 0.2–0.3 parts of methyl ethyl ketone peroxide solution with a mass fraction of 40%–55%, 0.1–0.3 parts of cobalt salt accelerator, 0.05–0.15 parts of diethylaniline accelerator, 0.5–0.7 parts of semi-permanent polysiloxane release agent with a solid content of 15%–30%, and 0.4–0.6 parts of weather-resistant inorganic pigment paste (which is titanium dioxide white pigment paste or iron oxide pigment paste). After all components are added, they are mixed at a speed of 300–600 rpm, while controlling the vacuum degree to ≤-0.09 MPa, degassing for 10 minutes, and maintaining the mixing temperature to ≤30℃ to finally obtain a homogeneous resin paste.

[0059] Entering the pultrusion stage:

[0060] Pretreated glass fibers are drawn from the yarn frame and formed into 0° / 90° fiber layers through the yarn distribution plate. Simultaneously, 20-30 parts of a composite felt consisting of needle-punched chopped strand mat and surface mat are introduced (the weight of the needle-punched chopped strand mat is 450 g / m²). 2 Thickness 3mm, surface felt weight 20~30g / m² 2 The volume ratio of needle-punched chopped strand mat to surface mat is 1:1, combined with 0.2-0.8 parts of polyester surface mat to achieve a resin-rich surface layer. The fiber layer and composite mat are then immersed in an impregnation bath at 25-30℃ for 8-12 seconds, controlling the resin content of the glass fiber at 48-52%. After that, they are placed in a mold for heating and curing. The mold adopts a three-stage temperature control: the inlet temperature is 110℃, the middle temperature is 120-125℃, and the outlet temperature is 130-135℃, ensuring that the peak exothermic temperature at the center of the thick section (≥80mm) is ≤120℃. The pultrusion speed is controlled at 0.2-0.6m / min, and the traction force is 3-5t, so that the residual stress of the profile after molding is reduced by ≥30% compared with the conventional process.

[0061] Post-curing treatment is performed after the profile is pultruded:

[0062] The cut profiles are placed flat in a hot air furnace, heated to 80℃ for 1 hour, then held at 100℃ for 1 hour, and finally held at 120℃ for 2 hours. The profiles are then allowed to cool naturally to below 60℃ before being removed from the furnace, ensuring that the glass transition temperature Tg of the post-cured profiles is ≥115℃.

[0063] Fine finishing:

[0064] The cutting burrs are removed using an automatic chamfering machine, with a chamfer size of 0.5×45°. The surface is then polished with 400# sandpaper to achieve a roughness Ra≤6.3µm, meeting the adhesion requirements for subsequent coating. Subsequently, the connecting holes are machined in one go according to the drawings using a CNC three-axis drilling and milling center, controlling the hole diameter tolerance to ±0.1mm and the positional accuracy to ≤0.5mm. Finally, a diamond saw blade is used for cold cutting to a fixed length, ensuring a length tolerance of ±1mm / m and an end face perpendicularity to ≤0.5mm.

[0065] The first connector 51 is designed as a right-angle block structure. During assembly, one side is tightly fixed to the top end face of one of the columns 1 by bolts, and the other side is bolted to the transmission 32 of the drive unit 3.

[0066] The right-angle block structure evenly distributes the weight and working torque of the drive unit to the column, effectively avoiding localized stress concentration. Compared to traditional welding or single bolt connections, it increases shear strength by more than 30%. Furthermore, the standardized structure of the right-angle blocks facilitates mass production, requires no additional calibration during assembly, and offers higher positioning accuracy.

[0067] The second connector 52 is inserted and fixed to the structural beam 2, with their cross-sections precisely matched. The cross-section includes three straight segments 521 and three concentrically arranged circular arc segments 520. Two straight segments are arranged symmetrically, two circular arc segments are arranged symmetrically, and the remaining straight segment and one circular arc segment are arranged opposite each other. The length of the opposite circular arc segment is greater than that of the symmetrical circular arc segment, and the length of the opposite straight segment is less than that of the symmetrical straight segment (e.g., ...). Figure 4 (As shown).

[0068] This irregular cross-section design allows for "alignment and fixation" during the insertion process of the structural beam and the second connector, eliminating the need for additional limiting components and improving assembly efficiency. The arc segment maintains the high torsional resistance of the composite material, while the straight segment provides a force-bearing point for auxiliary fixation after insertion, ensuring both connection strength and ease of disassembly and maintenance in the future. This solves the problems of poor compatibility between traditional connectors and beams, and difficulties in assembly and disassembly.

[0069] The core structure of the third connector 53 is a plug-in circular hole. During assembly, the third connector is first fixed to the top of another column 1 with bolts, and then the other end of the structural beam 2 is plugged into the circular hole. When the structural beam rotates, the arc segment 520 on its surface slides closely against the arc surface of the plug-in circular hole. Compared with traditional bearing connections, the arc surface has a larger contact area, more uniform pressure distribution, smoother rotation, and is less prone to wear. At the same time, the plug-in structure eliminates the need for complex bearing assemblies, reducing the number of vulnerable parts and further lowering maintenance costs.

[0070] The drive unit 3 includes a combination structure of a motor 31 and a gearbox 32. The gearbox 32 is fixed to the column 1 via a first connecting member 51. Its input end is rigidly connected to the rotating shaft of the motor 31, and its two output ends are respectively fixed to the second connecting member 52 (e.g., ...). Figure 2 (As shown).

[0071] This dual-output design can simultaneously drive two structural beams 2 to rotate synchronously, avoiding angular deviations when driving multiple beams and ensuring that the photovoltaic panels on both sides always maintain a consistent tracking angle. The motor 31 is powered by the photovoltaic panels themselves, and with the reduction and torque increase function of the gearbox 32, the angle adjustment accuracy can reach ±0.5°, which can accurately track the trajectory of sunlight. At the same time, the modular combination structure of the motor and gearbox allows for individual disassembly and replacement during maintenance without the need to disassemble the entire bracket, greatly improving the convenience of operation and maintenance.

[0072] During operation, after receiving the control signal, the motor 31 transmits the torque to the second connector 52 through the gearbox 32, which in turn drives the structural beam 2 to rotate around the insertion hole of the third connector 53, ultimately achieving the angle adjustment of the photovoltaic panel 4. The entire transmission process is smooth and quiet, and the shock absorption properties of the composite material effectively absorb the rotational impact, extending the service life of the drive unit.

[0073] The photovoltaic panel 4 is fixed to the structural beam 2 by a detachable structure, which includes a mounting plate 61 and a clamp 62 (e.g., Figure 5 (As shown). During assembly, first, the clamp 62 is fitted onto the structural beam 2, and the clamp is tightened with bolts to achieve a tight fit between the clamp and the structural beam. Then, the mounting plate 61 is fixed onto the clamp. Finally, the adjacent photovoltaic panels 4 are fixed to the same side or both sides of the mounting plate 61 with bolts.

[0074] The core advantages of this design are: First, its detachable nature means that when the photovoltaic panel malfunctions or needs upgrading, there is no need to disassemble the clamps or damage the structural beams; simply unscrewing the bolts connecting the photovoltaic panel and the mounting plate is sufficient for replacement, improving maintenance efficiency by more than 2 times. Second, its versatility allows the spacing of the mounting plates 61 to be flexibly adjusted according to the size of the photovoltaic panel, adapting to different specifications of photovoltaic modules without the need for custom brackets for specific photovoltaic panels. Third, its secure fixing means that the clamps 62 fit tightly against the irregular cross-section of the structural beam, and combined with the anti-slip properties of the composite material, it can effectively resist vibrations caused by strong winds, preventing the photovoltaic panel from loosening and falling off.

[0075] During operation, after receiving a control signal, motor 31 transmits torque to the second connector 52 via gearbox 32, thereby driving the structural beam 2 to rotate around the insertion hole of the third connector 53. This ultimately achieves angle adjustment of the photovoltaic panel 4. Motor 31 is powered by the photovoltaic panel 4 itself, and with the deceleration and torque-increasing function of gearbox 32, the angle adjustment accuracy can reach ±0.5°, accurately tracking the trajectory of sunlight. Furthermore, the shock-absorbing properties of the composite material effectively absorb rotational impacts, extending the service life of the drive unit 3. Performance verification shows that this photovoltaic frame performs well at UV-B 313nm and 0.89W / m². 2 Under cyclic conditions of 60℃ condensation for 4 hours, it withstands 2000 hours of weathering without powdering or cracking, and retains ≥80% of its flexural strength; under neutral salt spray (NSS) conditions, it withstands 2000 hours of salt spray without fiber exposure or white rust, and retains ≥80% of its flexural strength; under 23℃ and 50%RH conditions, with a load of 30% of its ultimate flexural strength, the residual deflection after 1000 hours of compression bending creep is ≤0.5%; with a span of 3m and a torque of 500 N·m, the torsion angle is ≤0.3°; using M12 stainless steel bolts for connection, it withstands 2×10 under conditions of amplitude ±2mm and frequency 5Hz. 5 After one cycle of fatigue testing, no cracks or loosening were found in the connection area.

[0076] It should be noted that the above-mentioned fillers can also be nano-silica, precipitated calcium carbonate or aluminum hydroxide alone, or any combination of two or more in any proportion. Their performance is the same as that of the filler made by mixing nano-SiO2 and CaCO3 in a 1:2 mass ratio, and they can all meet the requirements for structural strength and weather resistance.

[0077] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A novel composite material tracking photovoltaic frame, comprising a column (1), a structural beam (2), a drive unit (3), and a photovoltaic panel (4). The drive unit (3) is fixed to the column (1) to drive the structural beam (2) to rotate, and several photovoltaic panels (4) are fixed to the structural beam (2). The characteristic feature is that: The raw materials used to prepare the column (1) and the structural beam (2) are the same, and the materials, by weight, include: 67-75 parts of ECR ​​glass fiber untwisted roving treated with bissilane coupling agent; 0.2-0.3 parts of methyl ethyl ketone peroxide; Cobalt salt accelerator: 0.1–0.3 parts; 0.05–0.15 parts of diethylaniline; 20-30 parts of composite felt composed of needle-punched chopped strand mat and surface mat; 0.2-0.8 parts of polyester surface felt; 0.5-0.7 parts of low-shrinkage agent; 10-15 parts of filler; UV protectant 0.05-0.07 parts; 20-30 parts of isophthalic unsaturated polyester resin; 0.4-0.6 parts of pigment paste; 0.5–0.7 parts release agent.

2. The novel composite material tracking photovoltaic frame as described in claim 1, characterized in that: The methyl ethyl ketone peroxide is a solution with a mass fraction of 40% to 55%, the amount of the cobalt salt accelerator is 0.1–0.3 parts, and the amount of the diethylaniline accelerator is 0.05–0.15 parts.

3. The novel composite tracking photovoltaic rack as claimed in claim 1, wherein: The low-shrinkage agent is a styrene-maleic anhydride copolymer, an acrylic acid graft copolymer, or a polystyrene thermoplastic low-shrinkage agent.

4. The novel composite tracking photovoltaic rack as claimed in claim 1, wherein: The UV stabilizer is composed of a hindered amine light stabilizer and / or a benzotriazole UV absorber, wherein the amount of the hindered amine light stabilizer is 0.02–0.05 parts and the amount of the benzotriazole UV absorber is 0.03–0.07 parts.

5. The novel composite tracking photovoltaic rack as claimed in claim 1, wherein: The release agent is a semi-permanent polysiloxane release agent with a solid content of 15%–30%.

6. The novel composite material tracking photovoltaic frame as described in claim 1, characterized in that: The filler is one or a combination of two or more of nano-silica, precipitated calcium carbonate, and aluminum hydroxide. The pigment paste is a weather-resistant inorganic pigment paste, which is either a titanium dioxide white pigment paste or an iron oxide-based pigment paste.

7. The novel composite tracking photovoltaic rack as claimed in any one of claims 1 to 6, wherein: It also includes a first connector (51), a second connector (52) and a third connector (53). The materials of the first, second and third connectors are the same as those of the columns and structural beams. Two columns (1) are provided. The drive unit (3) is fixed to one of the columns (1) through the first connector (51). The third connector (53) is fixedly connected to the other column (1). One end of the structural beam (2) is fixed to the second connector (52), and the other end is inserted into the third connector (53). The second connector (52) is fixed to the output end of the drive unit (3).

8. The novel composite material tracking photovoltaic frame as described in claim 7, characterized in that: The drive unit (3) includes a motor (31) and a gearbox (32). The gearbox (32) is fixed to the first connector (51). The gearbox (32) has two output ends and one input end. The shaft of the motor (31) is connected to the input end. The two output ends are respectively fixed to the second connector (52).

9. The novel composite material tracking photovoltaic frame as described in claim 7, characterized in that: The structural beam (2) is plugged and fixed to the second connector (52), and the cross sections of the two are compatible. The cross section includes three straight segments (521) and three concentrically arranged circular arc segments (520). Two straight segments (521) are arranged symmetrically, two circular arc segments (520) are arranged symmetrically, and the remaining straight segment (521) and one circular arc segment are arranged opposite each other, and the arc length of the oppositely arranged circular arc segment is greater than the arc length of the symmetrically arranged circular arc segment. The length of a line segment arranged opposite to another line segment is less than the length of a line segment arranged symmetrically.

10. The novel composite material tracking photovoltaic frame as described in claim 9, characterized in that: The third connector (53) is provided with a plug-in circular hole. The structural beam (2) is plugged into the plug-in circular hole. When the structural beam (2) is driven to rotate by the driving unit (3), the arc segment (520) in the structural beam (2) rotates in contact with the arc surface of the plug-in circular hole.

11. The novel composite material tracking photovoltaic frame as described in claim 7, characterized in that: The first connector (51) is a right-angled block structure.

12. The novel composite material tracking photovoltaic frame as described in claim 7, characterized in that: The photovoltaic panel (4) and the structural beam (2) are detachable. The detachable structure includes a mounting plate (61) and a clamp (62). The mounting plate (61) is fixed to the structural beam (2) by the clamp (62), and the adjacent photovoltaic panel (4) is fixed to the mounting plate (61) by bolts.

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