Direct current cable for photoelectric curtain wall

Abstract

The utility model relates to the technical field of power cables, in particular to a direct-current cable for a photoelectric curtain wall, which comprises an inner conductor, and a braided reinforcing layer, an insulating layer and an outer protective layer which are sequentially arranged on the outer side of the inner conductor, the inner conductor is arranged in the center of the cable, the cross section of the inner conductor is oblate, the inner conductor comprises a plurality of wires which are tightly attached, and the wires are formed by tightly pressing and twisting tinned copper wires I and tinned copper wires II; the woven reinforcing layer is tightly attached to the outer side of the inner conductor and is formed by weaving tin-coated copper wires and alkali-free glass fibers in a warp and weft crossed manner; the insulating layer is tightly extruded on the outer side of the braided reinforcing layer, the outer protective layer is tightly extruded on the outer side of the insulating layer, and an anti-sticking layer is arranged between the insulating layer and the outer protective layer; the structure of the inner conductor and the braided reinforcing layer enables the cable to have certain flexibility and tensile and anti-distortion capability, can bear certain external force, and is not easy to be snapped when being bent. The cable is of a flat wire type structure, is easy to install and fix, and can be well hidden in the photoelectric curtain wall.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically to a DC cable for photovoltaic curtain walls. Background Technology

[0002] Building-integrated photovoltaics (BIPV) is a technology that combines solar photovoltaic power generation with buildings, with photovoltaic curtain walls accounting for the largest proportion. Photovoltaic curtain walls possess the functions of ordinary curtain wall envelopes, including aesthetic appeal, safety performance, thermal insulation, water tightness, air tightness, and sound insulation, while also generating electricity for the building's own use and for grid-connected power generation. The installation and laying of photovoltaic curtain walls requires a large number of photovoltaic DC cables between the modules.

[0003] In the prior art, such as the Chinese patent with announcement number CN217061541U entitled "A Photovoltaic Cable", the disclosed technical solution describes that the cable effectively increases the radiation resistance and high temperature resistance of the photovoltaic cable by setting the cable jacket of the cross-linked polyolefin insulation material, so that the photovoltaic cable can be used in harsh environments and avoid damage to the outer sheath of the photovoltaic cable caused by harsh environments. However, the existing photovoltaic DC cables are usually circular in structure, while the gap between the curtain wall strip between the photovoltaic glass and the window frame in the photovoltaic curtain wall is small. The use of traditional circular photovoltaic DC cables will cause problems such as difficult installation, difficulty in fixing, and difficulty in hiding, which will affect the aesthetics of the photovoltaic curtain wall. Utility Model Content

[0004] This utility model provides a DC cable for photovoltaic curtain walls to solve the above-mentioned problems.

[0005] This utility model adopts the following technical solution: a DC cable for photovoltaic curtain walls, including an inner conductor and a braided reinforcing layer, an insulating layer, and an outer sheath arranged sequentially on the outside of the inner conductor; the inner conductor is located at the center of the cable, and the cross-section of the inner conductor is a flat oval with a certain width and thickness. The inner conductor includes multiple conductors, which are tightly bonded together; the conductors include tinned copper wire one and tinned copper wire two, which are tightly twisted together to form a conductor, reducing the conductor diameter to be close to a solid conductor; the flat oval cross-section of the inner conductor makes the cable a flat wire structure, and the cable thickness is less than four millimeters and the width is less than seven millimeters when in use, so that it can pass through the curtain wall adhesive strip used in photovoltaic curtain walls, thus being well hidden in the photovoltaic curtain wall; the tightly twisted tinned copper wire one and tinned copper wire two form a conductor, and the conductors are tightly bonded together, making the inner conductor more compact and having a certain degree of flexibility and tensile and torsional resistance, able to withstand a certain external force and bending and not easily broken.

[0006] Furthermore, the braided reinforcement layer is tightly bonded to the outside of the inner conductor. The braided reinforcement layer includes tin-plated copper wire and alkali-free glass fiber, which are interwoven in warp and weft. The number of tin-plated copper wires in the braided reinforcement layer is twice the number of alkali-free glass fibers. The interwoven warp and weft of the tin-plated copper wire and alkali-free glass fiber provides good support in both the transverse and longitudinal directions, and also provides good elasticity and extensibility in both directions, preventing the cable from deforming and breaking under external force, thus improving the stability of the cable.

[0007] Furthermore, the insulation layer is tightly extruded onto the outside of the braided reinforcing layer, and the insulation layer is halogen-free PV cable insulation material; the outer sheath is tightly extruded onto the outside of the insulation layer, and the outer sheath is halogen-free PV cable sheath material; an anti-adhesion layer is provided between the insulation layer and the outer sheath; the anti-adhesion layer between the insulation layer and the outer sheath prevents the insulation layer and the outer sheath from sticking together, making the outer sheath easy to peel off without damaging the insulation layer during peeling.

[0008] The beneficial effects are: the inner conductor cross-section is flat and round, making the cable a flat wire structure. The finished cable thickness is less than four millimeters and the width is less than seven millimeters. When in use, it can pass through the curtain wall adhesive strip used in the photovoltaic curtain wall, thus being well hidden in the photovoltaic curtain wall.

[0009] The inner conductor is composed of multiple tightly fitted wires, and the wires are made of tinned copper wire one and tinned copper wire two tightly twisted together, making the inner conductor more compact, with a certain degree of flexibility and tensile and torsional resistance, and able to withstand a certain amount of external force and bending without being easily broken.

[0010] The braided reinforcement layer is made of tin-plated copper wire and alkali-free glass fiber woven together, which improves the cable's tensile and torsional resistance. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of an embodiment of a DC cable for a photoelectric curtain wall according to the present invention;

[0013] Figure 2 This is a schematic diagram of the wire structure according to an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the braided reinforcing layer in an embodiment of the present invention;

[0015] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0016] In the diagram: 100, inner conductor; 110, wire; 111, tinned copper wire one; 112, tinned copper wire two; 200, braided reinforcing layer; 201, tinned copper wire; 202, alkali-free glass fiber; 300, insulation layer; 400, outer sheath; 500, anti-sticking layer. Detailed Implementation

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] An embodiment of the DC cable for a photoelectric curtain wall according to this utility model is as follows: Figures 1 to 4 As shown: A DC cable for a photovoltaic curtain wall includes an inner conductor 100 and a braided reinforcing layer 200, an insulation layer 300, and an outer sheath 400 sequentially disposed outside the inner conductor 100. The inner conductor 100 is located at the center of the cable, and its cross-section is a flat oval with a certain width and thickness. The inner conductor 100 includes multiple conductors 110, which are tightly bonded together. Each conductor 110 includes a first tinned copper wire 111 and a second tinned copper wire 112, which are tightly twisted together to form a conductor. The inner conductor 100 has a flat, round cross-section, making the cable a flat wire structure. When in use, the cable thickness is less than four millimeters and the width is less than seven millimeters, allowing it to pass through the curtain wall adhesive strip used in photovoltaic curtain walls, thus being well hidden in the photovoltaic curtain wall. Tinned copper wire 111 and tinned copper wire 112 are tightly twisted together to form the inner conductor 110, and the inner conductor 100 is tightly fitted together, making the inner conductor 100 more compact and giving it a certain degree of flexibility and tensile and torsional resistance. It can withstand a certain amount of external force and bending and is not easily broken.

[0019] The braided reinforcement layer 200 is tightly attached to the outside of the inner conductor 100. The braided reinforcement layer 200 includes tin-plated copper wire 201 and alkali-free glass fiber 202, which are interwoven in warp and weft. The number of tin-plated copper wires 201 in the braided reinforcement layer 200 is twice the number of alkali-free glass fibers 202. The interwoven warp and weft of the tin-plated copper wires 201 and alkali-free glass fiber 202 provides good support in both the transverse and longitudinal directions, and also provides good elasticity and extensibility in both the transverse and longitudinal directions, preventing the cable from deforming and breaking when subjected to external forces, thus improving the stability of the cable.

[0020] The insulation layer 300 is tightly extruded over the outside of the braided reinforcing layer 200. The insulation layer 300 is a halogen-free PV cable insulation material. The outer sheath 400 is tightly extruded over the outside of the insulation layer 300. The outer sheath 400 is a halogen-free PV cable sheath material. An anti-adhesion layer 500 is provided between the insulation layer 300 and the outer sheath 400. The anti-adhesion layer 500 is provided between the insulation layer 300 and the outer sheath 400 to prevent adhesion between the insulation layer 300 and the outer sheath 400, making the outer sheath 400 easy to peel off without damaging the insulation layer 300 during peeling.

[0021] Based on the above embodiments, the working principle and process of this utility model are as follows: The inner conductor 100 of the cable has a flat oval cross-section, making the cable a flat wire structure. The finished cable thickness is less than four millimeters and the width is less than seven millimeters. Tinned copper wire 111 and tinned copper wire 112 are tightly twisted together to form conductor 110, and the conductors 110 are closely attached to each other, making the inner conductor 100 more compact and having a certain degree of flexibility and tensile and torsional resistance, which can withstand a certain amount of external force and is not easily broken by bending. Tinned copper wire 201 and alkali-free glass fiber 202 are cross-woven, so that the braided reinforcement layer 200 has good support in both the transverse and longitudinal directions, and has good elasticity and extensibility in both the transverse and longitudinal directions, preventing the cable from deforming and breaking when subjected to external force, and improving the stability of the cable. An anti-adhesion layer 500 is provided between the insulation layer 300 and the outer sheath 400, so that the insulation layer 300 and the outer sheath 400 will not stick together, making the outer sheath 400 easy to peel off without damaging the insulation layer 300.

[0022] When laying cables on a photovoltaic curtain wall, the cable has a flat wire structure and its size is smaller than the gap between the curtain wall sealing strips between the photovoltaic glass and the window frame. It can pass through the curtain wall sealing strips between the photovoltaic glass and the window frame and thus be hidden inside the window frame. Because the cable has a flat wire structure and has a certain degree of flexibility and tensile and torsional resistance, it can be easily laid openly or concealed along the complex shape of the main and secondary keels of the photovoltaic curtain wall using structural tape, double-sided tape, wire clips, and wrapping tape.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A DC cable for a photoelectric curtain wall, characterized by: The cable comprises an inner conductor (100), a braided reinforcing layer (200), an insulation layer (300) and an outer protective layer (400) arranged in sequence outside the inner conductor (100). The inner conductor (100) is arranged at the center of the cable, and the cross section of the inner conductor (100) is a flat circle with a certain width and thickness. The inner conductor (100) comprises a plurality of wires (110) which are closely attached to each other. The wire (110) comprises a tin-plated copper wire I (111) and a tin-plated copper wire II (112). The tin-plated copper wire I (111) and the tin-plated copper wire II (112) are tightly twisted to form the wire (110), so that the diameter of the wire (110) is reduced to be close to that of a solid conductor.

2. A DC cable for a photoelectric curtain wall according to claim 1, characterized in that: The braided reinforcing layer (200) is closely attached to the outside of the inner conductor (100), and the braided reinforcing layer (200) comprises a tin-plated copper wire (201) and an alkali-free glass fiber (202). The tin-plated copper wire (201) and the alkali-free glass fiber (202) are interlaced and woven.

3. A DC cable for a photoelectric curtain wall according to claim 2, characterized in that: The number of the tin-plated copper wire (201) contained in the braided reinforcing layer (200) is twice the number of the alkali-free glass fiber (202).

4. A DC cable for use in a photoelectric curtain wall according to claim 3, characterized in that: The insulation layer (300) is tightly extruded outside the braided reinforcing layer (200), and the insulation layer (300) is a halogen-free PV cable insulation material.

5. A DC cable for a photoelectric curtain wall according to claim 4, characterized in that: The outer protective layer (400) is tightly extruded outside the insulation layer (300), and the outer protective layer (400) is a halogen-free PV cable sheath material.

6. A DC cable for a photoelectric curtain wall according to claim 5, characterized by: The insulation layer (300) and the outer protective layer (400) are provided with an anti-sticking layer (500).

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