Anti-cracking and anti-ultraviolet photovoltaic direct-current cable
By using an aluminum alloy core and an ultraviolet-resistant protective layer in photovoltaic cables, combined with the design of protective shell and connecting ribs, the performance problems of traditional cables under strong ultraviolet light are solved, and cost reduction, mechanical performance improvement and construction efficiency are achieved. .
Patent Information
- Application Number
- CN202420453206.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-10
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-03-10
AI Technical Summary
After long-term exposure of cables to strong ultraviolet light, the color migration, insulation and sheath cracking will occur, the mechanical performance will be unqualified, the procurement cost is high, and the weight will be heavy, which will affect the power generation efficiency and the system operation quality.
Design of crack-resistant and anti-UV photovoltaic DC cable with aluminum alloy core, including strong UV light and low smoke halogen-free protective layer, irradiated crosslinked polyolefin insulation layer and aluminum alloy soft conductor, combining protective shell and connecting ribs to improve the cable The UV resistance and mechanical strength are combined and laid positive and negative polar cables to reduce cost and weight.
The long-term sun-aging resistance of the cable is achieved, reducing costs by 40%-60%, improving construction efficiency, ensuring the operating safety and mechanical properties of the system, and avoiding color migration and insulation problems.
Smart Images
Figure CN222300347U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wires and cables, and particularly relates to a crack-resistant and ultraviolet-proof photovoltaic DC cable. Background Art
[0002] The traditional photovoltaic power generation system cable process structure usually uses tinned soft copper conductors twisted together, extruded irradiation cross-linked polyolefin insulation, and the sheath is made of irradiation cross-linked polyolefin material. The finished product is inspected after being irradiated by an electron accelerator.
[0003] Cables with this structure have the disadvantages of high procurement cost, heavy weight, color migration, insulation and sheath cracking, and unqualified mechanical properties after long-term exposure to strong ultraviolet light. On-site photos provided by some customers show that after long-term exposure to the sun, the red cable surface has lost its original color and is only grayish white, and the sheath surface is seriously powdered, which seriously affects the operating quality of the electrical system. When the ambient humidity is high or it rains, it is very easy to cause the insulation resistance of the cable to drop, causing the power generation system to malfunction, affecting the power generation efficiency, and causing great losses.
[0004] In order to overcome the design defects of existing products, the utility model innovatively designs a strong ultraviolet light resistant aluminum alloy core photovoltaic cable structure, which can effectively reduce the cable cost and weight, and merge the two original separately laid positive and negative polarity cables into one parallel laid cable, and at the same time use a red color stripe mark on the surface of one of the cores to distinguish the positive and negative polarities. It has the advantages of less material consumption, low manufacturing cost, convenient laying, and high system operation safety. Utility Model Content
[0005] The purpose of the utility model is to provide a crack-resistant and UV-proof photovoltaic DC cable. The cable body has excellent UV resistance and can meet the requirements of long-term sunlight aging resistance. The product is light in weight and low in cost. It is 40%-60% cheaper than cables with conventional tinned copper conductor structures. It is easy to lay, and combining the original two cables together can greatly improve construction efficiency. It solves the problems of existing cables with high procurement costs, heavy weight, color migration, insulation and sheath cracking, and unqualified mechanical properties after long-term exposure to strong ultraviolet light.
[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0007] The utility model is a crack-resistant and UV-proof photovoltaic DC cable, comprising a placement seat, a protective pad fixedly connected to the top of the placement seat, a cable body arranged on the top of the protective pad, a strong UV-resistant low-smoke and halogen-free sheath arranged inside the cable body, an irradiation-crosslinked polyolefin insulation layer arranged on the inner wall of the strong UV-resistant low-smoke and halogen-free sheath, an aluminum alloy soft conductor arranged on the inner wall of the irradiation-crosslinked polyolefin insulation layer, and a connecting rib fixedly connected to the outer surface of the cable body. The cable body arranged in the utility model has excellent UV resistance and can meet the requirements of long-term resistance to sunlight aging. The product is light in weight, low in cost, and easy to lay. Combining the original two cables together can greatly improve construction efficiency.
[0008] Furthermore, a connecting block 1 is fixedly connected to the left and right sides of the placement seat, and a plurality of vertical rods are fixedly connected to the top of the connecting block 1. A protective component is arranged above the cable body. The vertical rods are arranged to position and limit the protective shell, so that the protective shell is more stable after installation.
[0009] Furthermore, the protection component includes a protective shell, and the left and right sides of the protective shell are fixedly connected to connecting blocks 2, the top of the inner wall of the protective shell is fixedly connected to a rubber pad, and a contact block is arranged at the center below the protective shell. By setting the protective shell, specifically when encountering a collision or an object falling, the protective shell can effectively protect the cable body, and the force generated by the collision will squeeze the protective shell. After the protective shell is squeezed, the rubber pad will contact the cable body, thereby playing a protective role again.
[0010] Furthermore, a fixed shell is fixedly connected at the center of the bottom of the protective shell, a handle is fixedly connected to the top of the protective shell, a sliding rod is slidably connected inside the contact block, a sliding shell is fixedly connected to the top of the contact block, and a spring is arranged inside the sliding shell. The fixed shell and the sliding shell are used to play a blocking role and can also support the contact block.
[0011] Furthermore, the second connecting block is plugged into the vertical rod, the bottom of the contact block contacts the top of the contact block, and the top of the sliding rod is fixedly connected to the bottom of the protective shell. By setting the sliding rod, the stability of the contact block during movement can be improved.
[0012] Furthermore, the top of the spring is fixedly connected to the bottom of the protective shell, the bottom of the spring is fixedly connected to the top of the contact block, the fixed shell is slidably connected to the sliding shell, and when the protective shell moves downward, it will squeeze the spring, so that it can have a certain distance of movement and buffer in the event of a collision.
[0013] The utility model has the following beneficial effects:
[0014] 1. The cable body provided in the utility model has excellent anti-ultraviolet performance, can meet the long-term resistance to sunlight aging, the product is light in weight and low in cost, and is 40%-60% lower in cost than cables with conventional tinned copper conductor structures. It is easy to lay, and combining the original two cables together can greatly improve construction efficiency.
[0015] 2. The utility model provides a protective shell, which can effectively protect the cable body when encountering a collision or falling objects, and the force generated by the collision will press the protective shell. After the protective shell is squeezed, the rubber pad will contact the cable body, thereby playing a protective role again.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for describing the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of the utility model cable body;
[0020] Figure 3 This is a schematic diagram of the bottom structure of the protective shell of the utility model;
[0021] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the contact block of the utility model;
[0022] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure of A.
[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0024] 1. Placement seat; 11. Protection pad; 111. Connection block 1; 112. Vertical rod; 12. Cable body; 121. Low-smoke, halogen-free sheath resistant to strong ultraviolet light; 122. Irradiation cross-linked polyolefin insulation layer; 123. Aluminum alloy soft conductor; 124. Connecting rib; 13. Protection assembly; 131. Protection shell; 132. Connection block 2; 133. Rubber pad; 134. Contact block; 341. Sliding rod; 342. Sliding shell; 343. Spring; 135. Fixed shell; 136. Handle. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figure 1-5 As shown, the utility model is a crack-resistant and UV-proof photovoltaic DC cable, comprising a placement seat 1, a protective pad 11 is fixedly connected to the top of the placement seat 1, a cable body 12 is arranged on the top of the protective pad 11, and an anti-strong UV low-smoke halogen-free sheath 121 is arranged inside the cable body 12, and an irradiation-crosslinked polyolefin insulation layer 122 is arranged on the inner wall of the anti-strong UV low-smoke halogen-free sheath 121, and an aluminum alloy soft conductor 123 is arranged on the inner wall of the irradiation-crosslinked polyolefin insulation layer 122. A connecting rib 124 is fixedly connected to the outer surface of the cable body 12. The cable body 12 arranged in the utility model has excellent UV resistance and can meet the long-term sunlight aging resistance. The product is light in weight and low in cost, and is 40%-60% lower in cost than cables with conventional tinned copper conductor structures. It is easy to lay, and combining the original two cables together can greatly improve the construction efficiency.
[0027] A connection block 111 is fixedly connected to the left and right sides of the placement seat 1 , a plurality of vertical rods 112 are fixedly connected to the top of the connection block 111 , and a protection component 13 is arranged above the cable body 12 .
[0028] The protection component 13 includes a protective shell 131, and the left and right sides of the protective shell 131 are fixedly connected to connecting blocks 132, the top of the inner wall of the protective shell 131 is fixedly connected to a rubber pad 133, and a contact block 134 is arranged at the center below the protective shell 131. By setting the protective shell 131, specifically when encountering a collision or an object falling, the protective shell 131 can effectively protect the cable body 12, and the force generated by the collision will press the protective shell 131. After the protective shell 131 is squeezed, the rubber pad 133 will contact the cable body 12, thereby playing a protective role again.
[0029] A fixed shell 135 is fixedly connected at the bottom center of the protective shell 131, a handle 136 is fixedly connected to the top of the protective shell 131, a sliding rod 341 is slidably connected inside the contact block 134, a sliding shell 342 is fixedly connected to the top of the contact block 134, and a spring 343 is arranged inside the sliding shell 342.
[0030] The second connecting block 132 is plugged into the vertical rod 112 , the bottom of the contact block 134 is in contact with the top of the contact block 134 , and the top of the sliding rod 341 is fixedly connected to the bottom of the protective shell 131 .
[0031] The top of the spring 343 is fixedly connected to the bottom of the protection shell 131 , the bottom of the spring 343 is fixedly connected to the top of the contact block 134 , and the fixed shell 135 is slidably connected to the sliding shell 342 .
[0032] A specific application of this embodiment is:
[0033] The design uses aluminum alloy as the soft conductor of the cable, and the diameter of the single wire is only 0.30mm, which can not only ensure the current carrying capacity of the cable, but also provide the bending performance of the cable, reduce the weight of the cable, and save the cable cost. The radiation cross-linked polyolefin insulation layer 122 sheath material with anti-UV additives is added. After the cable is irradiated, the sheath material can improve its resistance to strong ultraviolet light. It is extruded on the surface of the photovoltaic cable conductor. Except for black, the other colors have relatively poor resistance to sunlight aging. A color strip process with obvious color difference from the main body is adopted. The color strip is only coated on the surface of the sheath of the cable positive core, accounting for about 20% of the surface area of the positive core, so as to distinguish the positive and negative polarity of the core. The design adopts the connecting rib 124 process structure to combine the positive and negative poles of the cable together to facilitate laying, improve construction efficiency, and save laying space. During the operation, the cable body 12 is placed on the protective pad 11 on the top of the placement seat 1, and then the protective shell 131 is placed on the top of the cable body 12, so that the connecting blocks 132 on the left and right sides of the protective shell 131 are plugged into the vertical rod 112, and the bottom of the contact block 134 will contact the top of the connecting rib 124 and the surface of the cable body 12, so as to protect the cable body 12. When encountering a collision or an object falling, the protective shell 131 can effectively protect the cable body 12, and the force generated by the collision will press the protective shell 131, then the fixed shell 135 slides on the sliding shell 342 and squeezes the spring 343. After the protective shell 131 is squeezed, the rubber pad 133 will contact the cable body 12, so as to play a protective role again, and finally the protective shell 131 is reset under the elastic action of the spring 343.
[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A crack-resistant and UV-proof photovoltaic DC cable, comprising a placement seat (1), a protective pad (11) being fixedly connected to the top of the placement seat (1), a cable body (12) being arranged on the top of the protective pad (11), and characterized in that: The cable body (12) is provided with a strong ultraviolet light resistant low-smoke halogen-free sheath (121) inside, the inner wall of the strong ultraviolet light resistant low-smoke halogen-free sheath (121) is provided with a radiation cross-linked polyolefin insulation layer (122), the inner wall of the radiation cross-linked polyolefin insulation layer (122) is provided with an aluminum alloy soft conductor (123), and the outer surface of the cable body (12) is fixedly connected with a connecting rib (124).
2. The anti-cracking and UV-proof photovoltaic DC cable according to claim 1, characterized in that: The left and right sides of the placement seat (1) are fixedly connected to a connection block (111), the top of the connection block (111) is fixedly connected to a plurality of vertical rods (112), and a protection component (13) is arranged above the cable body (12).
3. The anti-cracking and UV-proof photovoltaic DC cable according to claim 2, characterized in that: The protection component (13) comprises a protection shell (131), the left and right sides of the protection shell (131) are fixedly connected to connection blocks 2 (132), the top of the inner wall of the protection shell (131) is fixedly connected to a rubber pad (133), and a contact block (134) is arranged at the center below the protection shell (131).
4. The anti-cracking and UV-proof photovoltaic DC cable according to claim 3, characterized in that: A fixed shell (135) is fixedly connected to the center of the bottom of the protective shell (131), a handle (136) is fixedly connected to the top of the protective shell (131), a sliding rod (341) is slidably connected inside the contact block (134), a sliding shell (342) is fixedly connected to the top of the contact block (134), and a spring (343) is arranged inside the sliding shell (342).
5. The anti-cracking and UV-proof photovoltaic DC cable according to claim 4, characterized in that: The second connecting block (132) is plugged into the vertical rod (112), the bottom of the contact block (134) is in contact with the top of the contact block (134), and the top of the sliding rod (341) is fixedly connected to the bottom of the protective shell (131).
6. The anti-cracking and UV-proof photovoltaic DC cable according to claim 5, characterized in that: The top of the spring (343) is fixedly connected to the bottom of the protective shell (131), the bottom of the spring (343) is fixedly connected to the top of the contact block (134), and the fixed shell (135) is slidably connected to the sliding shell (342).