Anti-interference safe photovoltaic cable

Abstract

The utility model relates to the technical field of cables, in particular to an anti-interference type safe photovoltaic cable, which comprises two cable bodies arranged in parallel and a single bridging cable arranged between the two cable bodies, the bridging cable is detachably connected with any cable body, each cable body comprises a tensile wire core and a plurality of conductive cable cores spirally wound on the periphery of the tensile wire core, and the conductive cable cores are detachably connected with the bridging cable. A first shielding layer, a second shielding buffer layer and a sheath layer are sequentially arranged on the periphery of the conductive cable core outwards, the second shielding buffer layer is elastic and compressible, a clamping groove is formed in the portion, connected with the bridging cable, of the sheath layer, and a sealing ring which does not interfere with the bridging cable is arranged outside the cable body in a sleeving mode. The second shielding buffer layer comprises a woven mesh layer with a waved cross section, and a soft column strip layer is inserted in the woven mesh layer; according to the anti-interference safe photovoltaic cable, through the design of a multi-layer shielding structure, the resistance of the cable to electromagnetic interference is significantly improved, and safe operation and stable power transmission of a photovoltaic system are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an anti-interference safety photovoltaic cable. Background Art

[0002] With the growing global demand for clean energy, the rapid development of the photovoltaic industry, and the ever-expanding scale of photovoltaic power station construction, the demand for photovoltaic cables is also increasing. In photovoltaic systems, cables are a crucial component connecting various components. Their performance directly impacts the stability and safety of the entire system, seriously leading to power loss and equipment failure, impacting the normal operation of photovoltaic power generation systems. Therefore, the shielding strength of specialized photovoltaic cables is crucial. Anti-interference and safe photovoltaic cables can ensure the stable operation of photovoltaic systems and provide reliable infrastructure support for the sustainable development of the photovoltaic industry.

[0003] In view of this, it is particularly important to develop a photovoltaic cable with strong anti-interference performance and ensure the long-term safe operation of the photovoltaic system. Summary of the Invention

[0004] The purpose of the utility model is to provide a novel anti-interference safety photovoltaic cable.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] An anti-interference safety photovoltaic cable comprises two cable bodies arranged in parallel and a single bridging cable therebetween. The bridging cable is detachably connected to any one of the cable bodies. The cable body comprises a tensile core and a plurality of conductive cable cores spirally wrapped around the tensile core. A first shielding layer, a second shielding buffer layer and a sheath layer are sequentially arranged outward from the periphery of the conductive cable core. The second shielding buffer layer is elastically compressible. A card slot is provided at the connection between the sheath layer and the bridging cable. The outer jacket of the cable body is provided with a sealing ring that does not interfere with the bridging cable.

[0007] Furthermore, the second shielding buffer layer includes a braided mesh layer with an undulating cross-section, a soft column strip layer is inserted in the undulating space of the braided mesh layer, and a braided mesh layer is spaced between every two adjacent soft column strip layers.

[0008] Furthermore, the braided mesh layer is woven from tinned copper wires, and the first shielding layer is composited from aluminum foil and polyester film.

[0009] Furthermore, the number of the conductive wire cores is 6 to 36, and the diameter of the conductive wire core is larger than that of the tensile wire core.

[0010] Furthermore, the lateral ends of the bridge cable are provided with card strips matching the card slots, and length marking points are provided at equal intervals in the middle along the length direction of the bridge cable.

[0011] Furthermore, the sealing ring can move along the axial direction of the cable body, its hardness is lower than one third of the hardness of the sheath layer, and its outer diameter exceeds the outer diameter of the sheath layer by 6 to 10 mm.

[0012] Furthermore, a heat-conducting filler is provided between the conductive cable core and the first shielding layer.

[0013] Furthermore, the distance between every two adjacent length marking points is 1 to 5 meters.

[0014] The beneficial effects of adopting the technical solution of the utility model are:

[0015] The utility model discloses an anti-interference safety photovoltaic cable, which significantly improves the cable's resistance to electromagnetic interference through the design of a multi-layer shielding structure, ensuring the safe operation of the photovoltaic system and stable power transmission; it realizes a detachable connection between the bridge cable and the cable body, which is easy to use; it can effectively prevent moisture intrusion and extend the service life of the photovoltaic panel junction box in a humid environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the AA section;

[0019] Figure 3 for Figure 2 A magnified schematic diagram of point B in the middle;

[0020] Figure 4 This is a schematic structural diagram of the medium-conducting cable core of the utility model;

[0021] Figure 5 This is a schematic structural diagram of the woven mesh layer in the present invention;

[0022] Figure 6 for Figure 5 Enlarged schematic diagram of point C in the middle;

[0023] In the figure: 1: cable body; 101: tensile strength core; 102: conductive cable core; 103: first shielding layer; 104: second shielding buffer layer; 104-1: braided mesh layer; 104-2: soft column layer; 105: sheath layer; 105-1: slot; 2: bridging cable; 201: clip; 202: length marking point; 3: sealing ring. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the components related to the present invention and should not limit the scope of protection of the present invention.

[0025] See also Figures 1 to 6 , an anti-interference safety photovoltaic cable, comprising two cable bodies 1 arranged in parallel and a single bridge cable 2 between the two, the bridge cable 2 being detachably connected to any cable body 1, and being easy to separate or connect;

[0026] The cable body 1 includes a tensile core 101 and multiple conductive cable cores 102 spirally wrapped around the tensile core 101. The number of conductive cable cores 102 ranges from 6 to 36, and their diameters are larger than those of the tensile core 101. Specifically, a first shielding layer 103, a second shielding buffer layer 104, and a jacket layer 105 are sequentially arranged outward from the periphery of the conductive cable core 102. The second shielding buffer layer 104 is elastically compressible. A slot 105-1 is provided at the connection between the jacket layer 105 and the bridge cable 2. Clips 201 matching the slots 105-1 are provided at both lateral ends of the bridge cable 2, enabling a detachable connection between the bridge cable 2 and the cable body 1.

[0027] The first shielding layer 103 is a composite of aluminum foil and polyester film, providing preliminary isolation from external electromagnetic interference. The aluminum foil is made of a highly conductive metal material, such as copper or aluminum, to enhance its reflection of high-frequency electromagnetic waves, while the polyester film provides excellent insulation. The first shielding layer 103 wraps around the outer periphery of the conductive cable core 102, effectively protecting the cable from external interference and electromagnetic waves, thereby improving conductivity reliability. The second shielding buffer layer 104 comprises a braided mesh layer 104-1 with an undulating cross-section. Braided mesh layer 104-1 is woven from tinned copper wire, further enhancing the electromagnetic shielding effect while providing a certain degree of mechanical strength. It has a strong absorption and dispersion effect on low-frequency magnetic fields, effectively shielding against external electromagnetic interference and radio frequency interference, and improving the anti-interference capability of the photovoltaic cable.

[0028] At the same time, a soft column strip layer 104-2 is inserted in the undulating space of the woven mesh layer 104-1, and there is a woven mesh layer 104-1 between every two adjacent soft column strip layers 104-2. The elastically compressible soft column strip layer 104-2 can provide additional protection for the cable, enhance its impact resistance, protect the internal cable core, and is not easily broken by external forces such as squeezing.

[0029] In the above solution, the design of a multi-layer shielding structure significantly improves the cable's resistance to electromagnetic interference, ensures the stable operation of the photovoltaic system, and improves its safety of use.

[0030] A further optimization solution places length marking points 202 at regular intervals along the length of the bridge cable 2, with the spacing between adjacent length marking points 202 being 1 to 5 meters. During cable laying, construction workers can use the length markings to quickly and accurately determine the required cable length, avoiding material waste or construction interruptions caused by inaccurate length estimation. With the length markings, construction workers can better plan the cable routing and layout, improving construction efficiency.

[0031] The photovoltaic panel junction box is a crucial component of the photovoltaic system. It channels the direct current generated by the photovoltaic panels through cables, enabling series or parallel connections between multiple photovoltaic panels. Dust-proof and waterproof sealing is particularly important at the connection between the photovoltaic panel junction box and the photovoltaic cable. Therefore, a sealing ring 3 is installed on the outer sleeve of the cable body 1 to prevent interference with the bridge cable 2. The sealing ring 3 is movable along the axial direction of the cable body 1. Its hardness is less than one-third that of the sheath layer 105, and its outer diameter exceeds that of the sheath layer 105 by 6 to 10 mm. This ring is clamped / pressed onto the connection between the photovoltaic panel junction box and the photovoltaic cable, effectively preventing moisture intrusion and extending the service life of the photovoltaic panel junction box in humid environments.

[0032] When a cable is in operation, current flowing through the conductor generates heat. If this heat cannot be dissipated promptly, the cable temperature will rise, increasing the conductor resistance. This increased resistance will increase power loss during transmission, reducing power transmission efficiency. Effective heat dissipation can effectively control cable temperature. Therefore, a thermally conductive filler is provided between the conductive core 102 and the first shielding layer 103 to ensure the cable's heat dissipation performance.

[0033] Furthermore, the sheath layer 105 is made of flame-retardant, low-smoke, halogen-free polyolefin. The cable's lifespan depends largely on the quality of the outermost sheath layer 105, which plays a crucial role in mechanical protection, insulation, environmental adaptability, and identification and labeling. It is a critical component in ensuring the safe and reliable operation of the cable.

[0034] During use: The design of the multi-layer shielding structure significantly improves the cable's resistance to electromagnetic interference, ensuring the safe operation of the photovoltaic system and stable power transmission; the bridging cable 2 and the cable body 1 are detachably connected, which is easy to use; it can effectively prevent moisture intrusion and extend the service life of the photovoltaic panel junction box in a humid environment; a thermal conductive filler is provided between the conductive cable core 102 and the first shielding layer 103 to ensure good heat dissipation of the cable.

[0035] The development of the photovoltaic industry has placed higher demands on the performance and safety of photovoltaic cables. The development of anti-interference and safe photovoltaic cables will help improve product market competitiveness, promote the development of the photovoltaic industry, enhance system stability, and ensure the safety of personnel and equipment.

[0036] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, any changes, modifications or additions should be included in the protection scope of the present invention.

Claims

1. An anti-interference safety photovoltaic cable, characterized by: The invention comprises two cable bodies (1) arranged in parallel and a single bridging cable (2) therebetween, wherein the bridging cable (2) is detachably connected to any one of the cable bodies (1), the cable body (1) comprising a tensile core (101) and a plurality of conductive cable cores (102) spirally wrapped around the tensile core (101), the conductive cable core (102) being provided with a first shielding layer (103), a second shielding buffer layer (104) and a sheath layer (105) in sequence outwardly, the second shielding buffer layer (104) being elastically compressible, a slot (105-1) being provided at a portion where the sheath layer (105) is connected to the bridging cable (2), and a sealing ring (3) which does not interfere with the bridging cable (2) is provided on the outer shell of the cable body (1).

2. The anti-interference safety photovoltaic cable according to claim 1, characterized in that: The second shielding buffer layer (104) comprises a braided mesh layer (104-1) with an undulating cross-section, a soft column strip layer (104-2) is inserted in the undulating space of the braided mesh layer (104-1), and a braided mesh layer (104-1) is spaced between every two adjacent soft column strip layers (104-2).

3. The anti-interference safety photovoltaic cable according to claim 2, characterized in that: The braided mesh layer (104-1) is braided from tinned copper wires, and the first shielding layer (103) is composited from aluminum foil and polyester film.

4. The anti-interference safety photovoltaic cable according to claim 1, characterized in that: The number of the conductive cable cores (102) is 6 to 36, and the diameter thereof is larger than the tensile core (101).

5. The anti-interference safety photovoltaic cable according to claim 1, characterized in that: The bridging cable (2) is provided with clamping strips (201) matching the clamping slots (105-1) at both transverse ends, and length marking points (202) are provided at equal intervals in the middle along the length direction of the bridging cable (2).

6. The anti-interference safety photovoltaic cable according to claim 1, characterized in that: The sealing ring (3) can move along the axial direction of the cable body (1), its hardness is lower than one third of the hardness of the sheath layer (105), and its outer diameter exceeds the outer diameter of the sheath layer (105) by 6 to 10 mm.

7. The anti-interference safety photovoltaic cable according to claim 1, characterized in that: A heat-conducting filler is provided between the conductive cable core (102) and the first shielding layer (103).

8. The anti-interference safety photovoltaic cable according to claim 1, characterized in that: The distance between every two adjacent length marking points (202) is 1 to 5 meters.

Images