Lightning protection connection structure of photovoltaic roof of cultivation greenhouse

Abstract

A lightning protection connecting structure of a photovoltaic roof of a cultivation greenhouse, several Chinese character-shaped convex ribs are uniformly distributed on the top surface of the color steel roof, the two sides of the Chinese character-shaped convex rib are clamped by the lower part of the clamping strip, the clamping bolt and the nut are inserted and fixed, the upper end horizontal part of the Chinese character-shaped convex rib is fixedly installed with a photovoltaic panel, the clamping strip is further fixedly installed with an edge fixing piece, the lower end of the edge fixing piece is fixedly connected with the clamping strip through the bolt and the nut, the upper end is bent towards the photovoltaic panel and is pressed against the edge of the photovoltaic panel; one end of the lightning arrester is fixed on the horizontal part of the clamping strip through the bolt and the nut together with the lower part of the edge fixing piece, the other end is connected with the building lightning protection grounding device; the two end pressing noses of the lightning arrester are connected by flexible aluminum stranded wire. It has the advantages of keeping the roof complete, flexible and firm connection, preventing the joint from falling off, ensuring the reliability of lightning protection, and convenient installation process.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic lightning protection technology, specifically a lightning protection connection structure for a photovoltaic roof of a livestock shed. Background Technology

[0002] Distributed photovoltaic (PV) power generation is a new and promising method of power generation and comprehensive energy utilization. It advocates the principles of local power generation, local grid connection, local conversion, and local use, effectively increasing the power generation of PV power plants while solving the problems of power loss during voltage boosting and transmission. Industrial and commercial factory buildings, as well as the rooftops of livestock sheds and surrounding ground, are particularly suitable for the construction of distributed power stations.

[0003] Commercial and industrial sheds or livestock farms typically have corrugated steel or resin tile roofs. Constructing a bracket-type photovoltaic power station using the space above the shed roof not only preserves the functionality of the shed but also avoids excessive sun exposure and makes full use of the available space. As a building, the livestock farm should also have lightning protection. According to GB / T32512-2016, "Rooftop photovoltaic power stations can use permanent metal structures on the roof as lightning rods, but all components must be electrically connected," and "The lightning rod should be able to withstand the mechanical and thermal effects of the expected lightning current." Currently, to meet these standards, existing lightning protection connections for livestock farms generally use hot-dip galvanized round or flat steel directly welded to the photovoltaic bracket or corrugated steel roof tiles as lightning rods. This welding is a rigid connection, with welding used at both ends. However, this results in the following drawbacks: 1. Since the corrugated steel roof is made of thin iron sheet, welding the lightning arrester directly onto the iron sheet can easily puncture it, damaging the roof and causing leaks. If the lightning arrester is directly anchored to the roof with bolts, leaks may also occur. 2. Ordinary lightning arresters use rigid hot-dip galvanized round or flat steel. When the roof and photovoltaic modules are pushed by external forces (such as swaying in strong winds or hail) or vibrated, relative displacement can occur, causing the welded joints to detach, rust, or even deform the support structure, making it difficult to ensure a reliable lightning protection connection. 3. The welding and bending processes during lightning arrester installation are cumbersome and inconvenient. Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides a lightning protection connection structure for photovoltaic roofs in livestock sheds. This structure offers several advantages, including maintaining roof integrity, flexible yet secure connections, preventing joint detachment, ensuring reliable lightning protection, and facilitating installation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A lightning protection connection structure for a photovoltaic roof of a livestock shed is disclosed. The roof surface of the corrugated steel roof is evenly distributed with several Z-shaped protruding ribs. The two sides of the Z-shaped ribs are clamped by the lower part of clamping strips, and clamping bolts and nuts are used for clamping and fixing. A photovoltaic panel is fixedly installed on the upper horizontal part of the Z-shaped ribs. An edge fixing component is also fixedly installed on the clamping strip. The lower end of the edge fixing component is fixedly connected to the clamping strip by bolts and nuts, and the upper end is bent towards the photovoltaic panel and pressed against the edge of the photovoltaic panel. One end of the lightning arrester, a wire lug, is fixed to the lower part of the edge fixing component on the horizontal part of the clamping strip by bolts and nuts, and the other end of the wire lug is connected to the building's lightning protection grounding device.

[0007] The advantages of using the above-mentioned photovoltaic panel connection structure are as follows: the zigzag ribs are clamped and fixed by the folded plate-shaped clamping strips, and the photovoltaic panels are then fixed to the upper end face of the clamping strips. All connecting parts will not damage the color steel tiles, thus maintaining the integrity and waterproof effect of the color steel tiles. Furthermore, the photovoltaic panels can be fixed and pressed tightly above the clamping strips by the Z-shaped cross-section edge fasteners. No drilling or other processing operations are required for the photovoltaic panels, thus maintaining the integrity of the photovoltaic panels and facilitating installation and disassembly.

[0008] The lightning arrester forms a direct path between the photovoltaic support structure and the building's lightning protection grounding device; the building's lightning protection grounding device can be a steel structure on another building connected to the ground, which conducts the current into the ground.

[0009] Flexible aluminum stranded wire is used to connect the wire lugs at both ends of the lightning arrester. Since the use of rigid round or flat steel lightning arresters has been eliminated, even if there is limited relative displacement between the photovoltaic panel and the color steel roof, it will not affect the fixation of the lightning arrester.

[0010] The clamping strip is also fixed with pads, and crossbeams are fixed to the upper surfaces of adjacent pads to support the two ends of the photovoltaic panel. The use of pads and crossbeams serves two purposes: firstly, it raises the support height of the photovoltaic panel, keeping it away from the drainage groove formed between the two protruding ribs of the lower corrugated steel sheet; secondly, the groove-shaped pads have a certain degree of compressive elasticity, allowing the edges of the photovoltaic panel to adhere tightly to the pressing edge of the edge fixing component after the edge fixing bolts are pressed down, increasing the firmness of the photovoltaic panel's fixation. The crossbeams increase the area of ​​the support, improving support stability.

[0011] The connection between the crimping lug and the aluminum stranded wire is wrapped with a waterproof sleeve. The waterproof sleeve enhances the corrosion and rust prevention of the joint.

[0012] The wire nose connection surface is tin-plated. After tin plating, the corrosion resistance, wear resistance, conductivity and mechanical strength of the wire nose can be improved.

[0013] In summary, the beneficial technical effects of this utility model are as follows:

[0014] 1. The lightning arrester of this device adopts a flexible connection, which can well meet the requirement that the metal lightning arrester can still be reliably connected when the photovoltaic device on the top of the greenhouse is under stress and swaying. The joint will not detach or deform, and the bracket will not deform. It also meets the standard connection and can withstand the mechanical and thermal effects generated by the expected lightning current.

[0015] 2. The connection structure does not cause any damage to the color steel roof, and is firmly fixed, which facilitates construction, installation and disassembly, shortens the construction period, reduces costs, and makes it easy to purchase construction materials. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of the components of this utility model (excluding the lightning arrester).

[0017] Figure 2 This is a structural diagram of the elevation connection of this utility model (including the lightning arrester).

[0018] Figure 3 for Figure 2 Cross-sectional structure diagram of the middle section of a photovoltaic panel;

[0019] Figure 4 This is a diagram showing the connection structure between the other end of the lightning arrester and the building's lightning protection grounding device.

[0020] Figure 5 This is a schematic diagram of the lightning arrester structure;

[0021] The components in the diagram are named as follows: 1-Color steel roof; 2-Clamping strip; 21-Clamping bolt; 3-Pan block; 4-Crossbeam; 5-Photovoltaic panel; 6-Edge fastener; 7-Lightning arrester; 71-Wire lug; 72-Waterproof sheath; 73-Aluminum stranded wire; 8-Building lightning protection grounding device. Detailed Implementation

[0022] Example 1

[0023] A lightning protection connection structure for a photovoltaic roof of a livestock shed includes a steel roof 1 with several Z-shaped ribs evenly distributed on its top surface. The two sides of the Z-shaped ribs are clamped by the lower part of the clamping strips 2, and clamping bolts 21 and nuts are used to clamp and fix them. A photovoltaic panel 5 is fixedly installed on the upper horizontal part of the Z-shaped ribs. An edge fixing member 6 is also fixedly installed on the clamping strips 2. The lower end of the edge fixing member 6 is fixedly connected to the clamping strips 2 by bolts and nuts, and the upper end is bent towards the photovoltaic panel 5 and pressed against the edge of the photovoltaic panel 5. One end of the lightning arrester 7, the wire lug 71, is fixed to the lower part of the edge fixing member 6 together with bolts and nuts on the horizontal part of the clamping strips 2. The other end of the wire lug 71 is connected to the building lightning protection grounding device 8.

[0024] The two ends of the lightning arrester 7 are connected by LJ-50 aluminum stranded wire 73 flexible aluminum stranded wire; a 50mm2 cross section is selected to meet the thermal stability requirements under lightning; and a telescopic length of 0.3 meters is reserved.

[0025] The clamping strip 2 is also fixed with pads 3, and the upper surface of the adjacent pads 3 is also fixed with crossbeams 4 to support the two ends of the photovoltaic panel 5.

[0026] The connection between the wire nose 71 and the aluminum stranded wire 73 is wrapped with a waterproof sheath 72.

[0027] The connecting surface of the pressure nose 73 is tin-plated.

Claims

1. A lightning protection connection structure for a photovoltaic roof of a livestock shed, characterized in that: The top surface of the color steel roof (1) is evenly distributed with several Z-shaped protrusions. The two sides of the Z-shaped protrusions are clamped by the lower part of the clamping strip (2). The clamping bolts (21) and nuts are inserted and clamped to fix them. The photovoltaic panel (5) is fixedly installed on the upper horizontal part of the Z-shaped protrusions. The edge fixing part (6) is also fixedly installed on the clamping strip (2). The lower end of the edge fixing part (6) is fixedly connected to the clamping strip (2) by bolts and nuts. The upper end is bent towards the photovoltaic panel (5) and pressed against the edge of the photovoltaic panel (5). One end of the lightning arrester (7) is fixed to the horizontal part of the clamping strip (2) together with the lower part of the edge fixing part (6) by bolts and nuts. The other end of the lightning arrester (7) is connected to the building lightning protection grounding device (8). The two ends of the lightning arrester (7) are connected by flexible aluminum stranded wire (73).

2. The lightning protection connection structure for the photovoltaic roof of the livestock shed according to claim 1, characterized in that: The clamping strip (2) is also fixed with pads (3), and the upper surface of the adjacent pads (3) is also fixed with crossbeams (4) to support the two ends of the photovoltaic panel (5).

3. The lightning protection connection structure for the photovoltaic roof of the livestock shed according to claim 1, characterized in that: The connection between the wire nose (71) and the aluminum stranded wire (73) is wrapped with a waterproof sheath (72).

4. The lightning protection connection structure for the photovoltaic roof of the livestock shed according to claim 1, characterized in that: The connecting surface of the pressure nose (71) is tin-plated.

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