An anti-corrosion photovoltaic bracket

Abstract

The application discloses a kind of anticorrosive photovoltaic support in solar photovoltaic power generation technical field, including vertical support, vertical support and horizontal support, the vertical support is double-layer hollow pipe shape structure, the inner layer pipe wall of vertical support is opened with the circular vent hole of diameter 1-3mm, the outer layer pipe wall of vertical support is opened with the circular vent hole of diameter 5-10mm, cavity is formed between inner and outer layer, the upper surface of horizontal support and vertical support is equipped with V-shaped flow guide groove, groove width 5-10mm, depth 3-5mm.The utility model discloses through the temperature difference natural convection of vertical support double-layer hollow structure, the quick water guide of V-shaped flow guide groove, black heat-absorbing film and electric heating wire are heated and dried intelligently, realize rainwater quick discharge, surface moisture accelerates evaporation, solve the problem that the existing photovoltaic support is caused by rainwater moisture adhesion and leads to metal corrosion, passive ventilation and single anticorrosive coating efficiency is low, with the effect of efficient water guide, active drying and long-acting corrosion prevention.

Description

Technical Field

[0001] This utility model relates to the field of solar photovoltaic power generation technology, specifically to a corrosion-resistant photovoltaic support. Background Technology

[0002] Currently, photovoltaic (PV) mounting systems, as key structures supporting PV power generation equipment, are mostly made of metal materials (such as steel). However, due to long-term exposure to the outdoor environment, they are susceptible to corrosion from rainwater, moisture, salt, and microorganisms. Traditional anti-corrosion methods (such as hot-dip galvanizing and painting) can delay corrosion to some extent, but the long-term adhesion of rainwater to the surface of the mounting system can still lead to coating failure. Especially when water accumulates at the bottom of the PV panels and is difficult to diffuse, the continuous contact between the metal components and moisture and oxygen accelerates corrosion, seriously affecting the structural strength and service life of the mounting system.

[0003] In the prior art, such as the patent with announcement number "CN220830403U", a corrosion-resistant photovoltaic bracket is disclosed. It achieves natural wind drying by means of vertical support hollow structure, air outlet and air guide groove design, and reduces moisture adhesion by guide plate. However, this patent has significant drawbacks in addressing the issue of moisture residue in complex environments: Firstly, it relies solely on passive ventilation using natural wind. When there is insufficient wind or no wind, it cannot actively accelerate the evaporation of moisture from the support surface, resulting in a significant decrease in drying efficiency. Especially in continuous rainy or high-humidity environments, prolonged moisture retention will still accelerate metal corrosion. Furthermore, the natural wind guiding structure has low wind utilization in multi-directional wind environments, making it difficult to form a continuous and effective drying airflow. Secondly, this solution lacks intelligent humidity sensing and active drying mechanisms, and cannot automatically adjust the ventilation intensity according to the actual humidity. When the humidity on the support surface increases due to dew or rainwater, it still needs to rely on natural drying conditions, failing to respond promptly and quickly reduce humidity. Moreover, the hydrophobic effect of the guide plate depends on the surface coating, and long-term wear of the coating can easily lead to a decrease in guiding efficiency, making it difficult to meet the long-term corrosion protection requirements of photovoltaic supports. Utility Model Content

[0004] The present invention aims to provide a corrosion-resistant photovoltaic support to solve the problems of metal corrosion caused by rainwater and moisture adhesion in existing photovoltaic supports, as well as the low efficiency of traditional passive ventilation and single anti-corrosion coating.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a corrosion-resistant photovoltaic bracket, including a vertical support, a longitudinal support, and a transverse support. The vertical support is a double-layer hollow tubular structure. The inner tube wall of the vertical support has circular ventilation holes with a diameter of 1-3mm, and the outer tube wall of the vertical support has circular ventilation holes with a diameter of 5-10mm. A cavity is formed between the inner and outer layers. The upper surfaces of the transverse and longitudinal supports are provided with V-shaped guide grooves with a groove width of 5-10mm and a depth of 3-5mm.

[0006] The working principle of this utility model is as follows: During the day, sunlight heats the inner wall of the vertical support, causing the heated air inside the cavity to rise and be discharged from the large holes in the outer layer. Cold air is drawn in from the bottom, forming a "bottom-in, top-out" airflow circulation. At night, the inner layer cools down, and the air contracts and sinks, being discharged from the bottom, forming a "top-in, bottom-out" airflow circulation. This continuously drives air through the small holes in the inner layer for 24 hours, accelerating the evaporation of moisture from the surface of the vertical support. The V-shaped drainage grooves (5-10mm wide and 3-5mm deep) on the upper surface of the horizontal and vertical supports guide rainwater to quickly collect and drip down along the inclined direction, reducing the adhesion time of moisture on the support surface. Through the dual effects of "ventilation and drying + drainage," the contact time between the metal components and moisture is reduced, thereby achieving an anti-corrosion effect.

[0007] The beneficial effects of this utility model are as follows: The vertical support of this utility model adopts a double-layer hollow tubular structure. The cavity between the inner and outer layers can form natural convection by utilizing the temperature difference. The small holes in the inner layer and the large holes in the outer layer work together to achieve continuous ventilation for 24 hours and accelerate the evaporation of surface moisture. The V-shaped guide grooves on the horizontal and vertical supports can guide rainwater to slide down quickly, reducing the adhesion time of water on the support surface and reducing the risk of corrosion from both water guiding and ventilation dimensions.

[0008] Furthermore, the inner ventilation holes of the vertical support are arranged in a spiral pattern with a spacing of 10-20 cm, while the outer ventilation holes of the vertical support are staggered vertically from the inner ventilation holes. The spiral arrangement of the inner ventilation holes allows for more uniform airflow and prevents localized moisture accumulation; the staggered distribution of the outer ventilation holes from the inner layer prevents rainwater from directly entering the cavity, while also enhancing air circulation efficiency and improving the overall drying effect.

[0009] Furthermore, the V-shaped guide channels are inclined along the length of the horizontal and vertical supports, with an inclination angle of 15°-30° and a channel spacing of 15-25cm. The V-shaped guide channels are inclined at 15°-30°, which conforms to the principles of fluid mechanics and can accelerate the flow of rainwater; the reasonable channel spacing can ensure a large area of ​​coverage of the support surface, prevent rainwater from accumulating on the plane of the crossbar, and further reduce the contact time between metal and water.

[0010] Furthermore, a black heat-absorbing film is attached to the upper surface of the horizontal support, and an electric heating wire is embedded beneath the film. A humidity sensor is installed on the horizontal support, and the humidity sensor is electrically connected to the electric heating wire. The black heat-absorbing film can absorb solar energy to raise the surface temperature of the support and accelerate moisture evaporation. The electric heating wire and humidity sensor are linked, and when the humidity exceeds a threshold, they automatically heat and dry the support, achieving active drying. This is especially effective in reducing the humidity of the support on cloudy or windless days. No additional power source is required; the system only consumes electricity generated by the photovoltaic panels themselves, making it energy-saving and environmentally friendly.

[0011] Furthermore, the heating wire is electrically connected to the power supply system of the photovoltaic panel, and the threshold of the humidity sensor is set to 60%-80% humidity. The heating wire is directly connected to the photovoltaic panel power supply system, making full use of clean energy and reducing operating costs; the humidity sensor threshold setting of 60%-80% can accurately trigger the heating mechanism, avoiding ineffective energy consumption and achieving intelligent and energy-saving drying control.

[0012] Furthermore, a conical pier is provided at the bottom of the vertical support, and a 45° inclined drainage groove is opened on the side of the pier. The inclined drainage groove design of the conical pier can quickly drain rainwater around the base and prevent water from soaking the bottom of the vertical support; the 45° inclination angle ensures smooth drainage, reduces soil moisture erosion on the bottom of the support, and extends the service life of the overall structure.

[0013] Furthermore, the inner and outer pipe walls of the vertical support are fixedly connected by an annular support member. The annular support member fixes the inner and outer pipe walls, ensuring the stability of the double-layer hollow structure and preventing deformation due to stress from affecting the ventilation effect during long-term use; it also ensures a constant cavity spacing, maintaining the continuity and effectiveness of temperature difference convection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a corrosion-resistant photovoltaic support according to the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the central vertical rod;

[0016] Figure 3 for Figure 1 Side view of the middle crossbar;

[0017] Figure 4 for Figure 3 The front sectional view.

[0018] The reference numerals in the accompanying drawings include: outer pipe wall 1 of the vertical support, outer ventilation hole 101, longitudinal support 2, V-shaped guide channel 201, horizontal support 3, conical pier 4, inner pipe wall 5 of the vertical support, and inner ventilation hole 501. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The basic implementation examples are as follows: Figure 1 -Appendix Figure 4As shown: A corrosion-resistant photovoltaic support includes a vertical support, a longitudinal support 2, and a transverse support 3. A conical pier 4 is fixedly installed at the bottom of the vertical support, and a 45° inclined drainage groove is opened on the side of the pier. The vertical support has a double-layer hollow tubular structure. The inner tube wall 5 of the vertical support has inner ventilation holes 501 with a diameter of 3mm, arranged in a spiral pattern with a spacing of 20cm. The outer tube wall 1 of the vertical support has outer ventilation holes 101 with a diameter of 10mm. Both the inner and outer ventilation holes 501 are circular. The outer ventilation holes 101 are staggered vertically from the inner ventilation holes 501. A cavity is formed between the pipe walls 1. The inner pipe wall 5 of the vertical support is fixedly connected to the outer pipe wall 1 of the vertical support by a ring support. The upper surfaces of the horizontal support 3 and the longitudinal support 2 are provided with V-shaped flow guide grooves 201, with a groove width of 10mm and a depth of 5mm. The V-shaped flow guide grooves 201 are inclined along the length direction of the horizontal support 3 and the longitudinal support 2, with an inclination angle of 30° and a groove spacing of 25cm. The upper surface of the horizontal support 3 is covered with a black heat-absorbing film, and an electric heating wire is fixedly embedded under the heat-absorbing film. A humidity sensor is fixedly installed on the horizontal support 3. The humidity sensor is electrically connected to the electric heating wire, and the electric heating wire is electrically connected to the power supply system of the photovoltaic panel. The threshold of the humidity sensor is set to 60%-80% humidity.

[0021] The specific implementation process is as follows: The vertical support uses inner and outer galvanized steel pipes. The inner pipe wall 5 of the vertical support has a 3mm diameter spiral ventilation hole 501, and the outer pipe wall 1 has a 10mm diameter staggered outer ventilation hole 101. After forming a 10mm cavity through a ring support, the bottom is bolted to a C30 concrete conical pier 4. A 45° drainage groove is chiseled on the side of the pier and anti-corrosion rubber strips are embedded. The upper surfaces of the longitudinal support 2 and the transverse support 3 are milled with V-shaped guide channels 201, 10mm wide, 5mm deep, and inclined at 30°, and fixed to the top of the vertical support. A black heat-absorbing film is pasted onto the upper surface of the transverse support 3, with an electric heating wire embedded under the film and electrically connected to a humidity sensor. The electric heating wire is connected to the 24V DC power supply system of the photovoltaic panel. The humidity sensor threshold is set to 60%-80%. During assembly, ensure the V-shaped guide channels 201 are aligned in the same direction. Test ventilation with smoke and drainage with water spray, and verify that the electric heating wire heats to 40℃ when humidity > 80% and automatically stops when humidity < 60%.

[0022] Rainy day scene:

[0023] Rainwater falls on the horizontal support 3 and the vertical support 2, and quickly converges along the 30° inclined V-shaped guide channel 201. The channel is 10mm wide and 5mm deep, which allows the rainwater to drip off within 1 minute, reducing the adhesion time on the metal surface. In the double-layer hollow structure of the vertical support, sunlight shines on the inner tube wall during the day, and the air in the cavity is heated and rises and is discharged from the outer large hole. The bottom draws in cold air to form a "bottom in and top out" airflow, which drives the moisture near the inner small hole to be discharged, accelerating the surface drying.

[0024] Sunny / Normal Humidity Scenario:

[0025] The black heat-absorbing film absorbs solar energy, raising the surface temperature of the horizontal support 3 by 5-10°C and accelerating the evaporation of residual moisture. The double-layer structure of the vertical support continuously utilizes the day-night temperature difference for ventilation: during the day, thermal convection drives moisture to rise and be expelled, while at night, the inner layer cools, and the air contracts and sinks, forming an "upward in, downward out" airflow that continuously dries the support surface 24 hours a day.

[0026] Cloudy / High Humidity Scenarios:

[0027] When the humidity sensor detects a value greater than 80%, the heating wire automatically turns on (powered by the photovoltaic panel) and heats the horizontal support at 3 to 40°C, which, together with the black heat-absorbing film, accelerates drying. At the same time, the temperature difference ventilation of the double-layer vertical support continues to operate. After the humidity is reduced to below 60% within 1 hour, the heating wire automatically stops to avoid ineffective energy consumption.

[0028] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A corrosion-resistant photovoltaic support, comprising vertical supports, longitudinal supports, and transverse supports, characterized in that: The vertical support is a double-layer hollow tubular structure. The inner tube wall of the vertical support has circular ventilation holes with a diameter of 1-3mm, and the outer tube wall of the vertical support has circular ventilation holes with a diameter of 5-10mm. A cavity is formed between the inner and outer tube walls of the vertical support. The upper surfaces of the horizontal and vertical supports are provided with V-shaped guide grooves with a width of 5-10mm and a depth of 3-5mm.

2. The corrosion-resistant photovoltaic support according to claim 1, characterized in that: The inner ventilation holes of the vertical support are arranged in a spiral shape with a hole spacing of 10-20cm. The outer ventilation holes of the vertical support are staggered from the inner ventilation holes.

3. The corrosion-resistant photovoltaic support according to claim 2, characterized in that: The V-shaped guide groove is inclined along the length of the horizontal and vertical supports, with an inclination angle of 15°-30° and a groove spacing of 15-25cm.

4. The corrosion-resistant photovoltaic support according to claim 3, characterized in that: The upper surface of the horizontal support is covered with a black heat-absorbing film, and an electric heating wire is embedded under the heat-absorbing film. A humidity sensor is installed on the horizontal support, and the humidity sensor is electrically connected to the electric heating wire.

5. A corrosion-resistant photovoltaic support according to claim 4, characterized in that: The heating wire is electrically connected to the power supply system of the photovoltaic panel, and the threshold of the humidity sensor is set to 60%-80% humidity.

6. The corrosion-resistant photovoltaic support according to claim 5, characterized in that: The bottom of the vertical support is equipped with a conical pier, and the side of the pier has a 45° inclined drainage channel.

7. A corrosion-resistant photovoltaic support according to claim 6, characterized in that: The inner and outer pipe walls of the vertical support are fixedly connected by an annular support member.

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