Power cable with cold resistance

Abstract

The utility model discloses a power cable with cold resistance, which comprises three cable core monomers and a nylon framework, a steel wire rope is arranged in the center of the nylon framework, three support arms are uniformly distributed in the circumferential direction of the nylon framework, the adjacent support arms form a placing space, the cable core monomers are positioned in the placing space, and the cable core monomers are positioned in the nylon framework. Arc-shaped supporting plates are arranged at the outer ends of the supporting arms; and an outer shielding layer, an outer insulating layer, a cold-resistant layer, an armor layer and an outer sheath layer are sequentially arranged on the outer side of the nylon framework. The power cable with cold resistance has the advantages of simple and stable structure, low temperature resistance and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a power cable with cold-resistant performance. Background Art

[0002] Power cables are cables used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems.

[0003] However, the power cables currently in use have poor low-temperature resistance. They are prone to cracking and breaking at low temperatures, which seriously affects the normal operation of the power transmission network and cannot meet usage requirements. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a cold-resistant power cable with a simple and stable structure, low temperature resistance, and a long service life.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A power cable with cold resistance performance, comprising three cable core monomers and a nylon frame, wherein a steel wire rope is arranged at the center of the nylon frame, and three arms are evenly arranged in the circumferential direction of the nylon frame, and adjacent arms form a placement space, wherein the cable core monomer is located in the placement space, and the outer ends of the arms have arc-shaped support plates;

[0007] An outer shielding layer, an outer insulating layer, a cold-resistant layer, an armor layer and an outer sheath layer are sequentially arranged on the outer side of the nylon skeleton.

[0008] In this way, through the setting of the nylon skeleton, the three cable monomers can be separated and limited, and through the support of the arc-shaped support plate, the overall structure of the power cable can be kept stable, the overall bending resistance is improved, and the low-temperature brittle fracture and cracking of the power cable are reduced; through the setting of the steel wire rope, the tensile strength of the power cable is increased, the performance of the power cable is improved as a whole, and the service life is extended.

[0009] An outer shielding layer, an outer insulating layer, a cold-resistant layer, an armor layer and an outer sheath layer are arranged in sequence on the outside of the nylon skeleton, which can improve the safety performance and cold-resistant effect. The setting of the armor layer can improve the overall strength of the power cable and extend the service life of the cable.

[0010] Wherein, the inner side of the outer shielding layer is filled with silica gel particles.

[0011] The cable core monomer comprises a copper conductor, and an inner insulating layer, an inner shielding layer and a thermal insulation layer are sequentially arranged on the outer side of the copper conductor.

[0012] Among them, the inner insulation layer and the outer insulation layer are both made of cold-resistant and low-temperature halogen-free materials; the outer shielding layer and the inner shielding layer are both made of highly flame-retardant chlorinated polyethylene rubber materials; the cold-resistant layer is a polyurethane elastomer cold-resistant isolation sleeve; the insulation layer is asbestos material or insulation cotton layer or rubber layer; the armor layer is a steel belt armor layer; and the outer sheath layer is made of polyethylene material.

[0013] Wherein, a nano coating is arranged on the outer side of the sheath layer.

[0014] In summary, the power cable with cold-resistant performance has the advantages of simple and stable structure, low temperature resistance and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a power cable with cold-resistant performance.

[0016] Figure 2 Schematic diagram of the cable core monomer. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "upper, lower" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0018] like Figure 1-2 As shown, a power cable with cold-resistant performance includes three cable core monomers 1 and a nylon skeleton 2. A steel wire rope 3 is arranged at the center of the nylon skeleton. Three arms are evenly distributed around the nylon skeleton. Adjacent arms form a placement space. The cable core monomer is located in the placement space. The outer ends of the arms have arc-shaped support plates.

[0019] An outer shielding layer 4, an outer insulating layer 5, a cold-resistant layer 6, an armor layer 7 and an outer sheath layer 8 are sequentially arranged on the outer side of the nylon skeleton.

[0020] In this way, through the setting of the nylon skeleton, the three cable monomers can be separated and limited, and through the support of the arc-shaped support plate, the overall structure of the power cable can be kept stable, the overall bending resistance is improved, and the low-temperature brittle fracture and cracking of the power cable are reduced; through the setting of the steel wire rope, the tensile strength of the power cable is increased, the performance of the power cable is improved as a whole, and the service life is extended.

[0021] An outer shielding layer, an outer insulating layer, a cold-resistant layer, an armor layer and an outer sheath layer are arranged in sequence on the outside of the nylon skeleton, which can improve the safety performance and cold-resistant effect. The setting of the armor layer can improve the overall strength of the power cable and extend the service life of the cable.

[0022] Specifically, the inner side of the outer shielding layer is filled with silica gel particles 10. The silica gel particles have good elasticity. When the cable is bent, the power cable can flatten the silica gel particles to buffer the bending force, thereby improving the bending resistance of the cable, better bending resistance, and extending the service life.

[0023] Specifically, the cable core monomer includes a copper conductor 11, and the outer side of the copper conductor is sequentially provided with an inner insulating layer 12, an inner shielding layer 13 and a thermal insulation layer 14. The provision of the thermal insulation layer can better perform heat preservation and improve the cold resistance effect.

[0024] Specifically, the end of the support arm of the nylon frame connected to the arc-shaped support plate is larger than the other end, which can increase the contact area with the arc-shaped support plate, better withstand the force transmitted by the arc-shaped support plate, and improve the supporting stability of the nylon frame.

[0025] Specifically, the inner insulating layer and the outer insulating layer are both made of cold-resistant and low-temperature halogen-free materials to improve the cold resistance and insulation performance; the outer shielding layer and the inner shielding layer are both made of highly flame-retardant chlorinated polyethylene rubber material; the cold-resistant layer is a polyurethane elastomer cold-resistant isolation sleeve; the thermal insulation layer is an asbestos material or a thermal insulation cotton layer or a rubber layer; the armor layer is a steel belt armor layer to improve the strength, better protect the structure, and extend the service life; the outer sheath layer is made of polyethylene material, which has low water absorption, good corrosion resistance, good chemical stability, and can extend the service life of the power cable. By setting the outer sheath layer, the overall protection performance is improved.

[0026] Specifically, the outer side of the sheath layer is provided with a nano coating 10, which can improve the wear resistance of the outer sheath layer and extend its service life.

[0027] Finally, it should be noted that those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A power cable with cold resistance, comprising three cable core monomers, characterized in that: It also includes a nylon skeleton, a steel wire rope is arranged at the center of the nylon skeleton, three arms are evenly arranged in the circumference of the nylon skeleton, adjacent arms form a placement space, the cable core monomer is located in the placement space, and the outer ends of the arms have arc-shaped support plates; An outer shielding layer, an outer insulating layer, a cold-resistant layer, an armor layer and an outer sheath layer are sequentially arranged on the outer side of the nylon skeleton.

2. A power cable with cold resistance according to claim 1, characterized in that: The inner side of the outer shielding layer is filled with silica gel particles.

3. A cold-resistant power cable according to claim 2, characterized in that: The cable core monomer comprises a copper conductor, and an inner insulating layer, an inner shielding layer and a thermal insulation layer are sequentially arranged on the outer side of the copper conductor.

4. A cold-resistant power cable according to claim 3, characterized in that: The inner insulating layer and the outer insulating layer are both made of cold-resistant and low-temperature halogen-free materials; the outer shielding layer and the inner shielding layer are both made of highly flame-retardant chlorinated polyethylene rubber materials; the cold-resistant layer is a polyurethane elastomer cold-resistant isolation sleeve; the insulation layer is an asbestos material or an insulation cotton layer or a rubber layer; the armor layer is a steel belt armor layer; and the outer sheath layer is made of polyethylene material.

5. The cold-resistant power cable according to claim 1, characterized in that: The outer side of the sheath layer is provided with a nano coating.

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