Bending-resistant power cable

Abstract

The utility model discloses a bending-resistant power cable, which comprises three cable core monomers, a nylon framework and a scaling ring body, the nylon framework is provided with three arc-shaped bearing grooves in the circumferential direction, the three cable core single bodies are arranged in the three bearing grooves respectively, the scaling ring body comprises at least three nylon plates which are lapped end to end, the nylon plates are arranged in an arc shape, and the nylon plates are lapped end to end along the same circumferential direction. The two ends of the nylon plates are located on the outer sides and the inner sides of the ends of the two adjacent nylon plates respectively, the outer side of the scaling ring body is coated with a fiber rope cross woven mesh layer, the outer side of the woven mesh layer is extruded with an inner sheath layer, the outer side of the inner sheath layer is coated with a shielding layer, the outer side of the shielding layer is woven with a steel tape armoring layer, and the outer side of the steel tape armoring layer is extruded with an outer sheath layer. And an outer sheath layer is extruded on the outer side of the steel tape armoring layer. The bending-resistant power cable has the advantages of being convenient to bend, long in service life and high in stability.

Description

Technical Field

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

[0002] Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems, including power cables of various voltage levels and insulation levels from 1 to 500KV and above.

[0003] Power cables are commonly used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. They are involved in industries such as electricity, construction, communications, and manufacturing. During the laying process, when there is a height difference in the laying position, the power cables need to be able to bend. However, the power cables currently used have poor bending performance and are at risk of breaking after being bent for a long time, which affects the service life of the power cables and brings inconvenience to production and life. 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 bending-resistant power cable that is easy to bend, has a long service life, and has high stability.

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

[0006] A bending-resistant power cable comprises three cable core monomers, a nylon frame and a zoom ring;

[0007] The nylon skeleton has three arc-shaped supporting grooves in the circumference, and the three cable core monomers are respectively arranged in the three supporting grooves. The zoom ring body includes at least three nylon plates with overlapping ends. The nylon plates are arranged in an arc shape. Along the same circumferential direction, the two ends of the nylon plates are respectively located on the outside and inside of the ends of two adjacent nylon plates. The outer side of the zoom ring body is covered with a cross-woven mesh layer of fiber ropes, the outer side of the woven mesh layer is extruded with an inner sheath layer, the outer side of the inner sheath layer is wrapped with a shielding layer, the outer side of the shielding layer is a woven steel belt armor layer, and the outer side of the steel belt armor layer is extruded with an outer sheath layer.

[0008] In this way, through the setting of the nylon skeleton and the scaling ring body, the cable core monomer can be displaced relative to the nylon skeleton and the scaling ring body. When the power cable is bent, due to the setting of the nylon skeleton and the scaling ring body, it can be more likely to bend and deform to adapt to the height difference changes in the laying position. The outer side of the scaling ring body is coated with a fiber rope cross-woven mesh layer, and the adjacent nylon plates can produce relative displacement, which can squeeze the three cable core monomers into the supporting groove of the nylon skeleton while making the power cable as a whole softer, more resistant to bending, and longer in service life. The inner sheath layer and the outer sheath layer are provided to better improve the service life of the power cable and protect the power cable. The provision of the steel belt armor layer improves the overall strength of the power cable and extends the service life of the cable. The shielding layer can better improve the safety performance.

[0009] Wherein, the zoom ring body includes three nylon plates.

[0010] The cable core monomer includes a copper conductor, a conductor shielding layer extruded outside the copper conductor, a silicone rubber insulation layer extruded outside the conductor shielding layer, an insulation shielding layer extruded outside the silicone rubber insulation layer, and a metal shielding layer extruded outside the insulation shielding layer.

[0011] Wherein, the inner sheath layer and the outer sheath layer are both made of polyethylene sheath layer, which has low water absorption, good corrosion resistance, good chemical stability, and can extend the service life of the power cable.

[0012] Wherein, the shielding layer is woven from tinned copper wires.

[0013] The metal shielding layer is a copper tape shielding layer or a copper wire shielding layer. The outer surface of the copper wire shielding layer is tightly bound by reversely wrapped copper wires or copper tapes, and the copper tape shielding layer is composed of one or more layers of overlapping soft copper tapes.

[0014] Wherein, the insulating shielding layer is formed by extruding a semi-conductive shielding material on the outer side of the insulating layer.

[0015] In summary, the bending-resistant power cable has the advantages of being easy to bend, having a long service life and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic structural diagram of a bending-resistant power cable.

[0017] Figure 2 Schematic diagram of the cable core monomer.

[0018] Figure 3 Schematic diagram of the nylon skeleton. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1-2 As shown, a bending-resistant power cable comprises three cable core monomers 1, a nylon skeleton 2 and a zoom ring;

[0021] The nylon skeleton has three arc-shaped supporting grooves in the circumference, and the three cable core monomers are respectively arranged in the three supporting grooves. The zoom ring body includes at least three nylon plates 3 with overlapping ends. The nylon plates are arranged in an arc shape. Along the same circumferential direction, the two ends of the nylon plates are respectively located on the outside and inside of the ends of two adjacent nylon plates. The outer side of the zoom ring body is covered with a fiber rope cross-woven mesh layer 4, the outer side of the woven mesh layer is extruded with an inner sheath layer 5, the outer side of the inner sheath layer is wrapped with a shielding layer 6, the outer side of the shielding layer is a woven steel belt armor layer 7, and the outer side of the steel belt armor layer is extruded with an outer sheath layer 8.

[0022] In this way, through the setting of the nylon skeleton and the scaling ring body, the cable core monomer can be displaced relative to the nylon skeleton and the scaling ring body. When the power cable is bent, due to the setting of the nylon skeleton and the scaling ring body, it can be more likely to bend and deform to adapt to the height difference changes in the laying position. The outer side of the scaling ring body is coated with a fiber rope cross-woven mesh layer, and the adjacent nylon plates can produce relative displacement, which can squeeze the three cable core monomers into the supporting groove of the nylon skeleton while making the power cable as a whole softer, more resistant to bending, and longer in service life. The inner sheath layer and the outer sheath layer are provided to better improve the service life of the power cable and protect the power cable. The provision of the steel belt armor layer improves the overall strength of the power cable and extends the service life of the cable. The shielding layer can better improve the safety performance.

[0023] In practice, the zoom ring body includes three nylon plates, which is convenient for manufacture and use.

[0024] During implementation, the cable core monomer includes a copper conductor 11, a conductor shielding layer 12 extruded on the outside of the copper conductor, a silicone rubber insulation layer 13 extruded on the outside of the conductor shielding layer, an insulation shielding layer 14 extruded on the outside of the silicone rubber insulation layer, and a metal shielding layer 15 extruded on the outside of the insulation shielding layer. The cable core monomer is a conventional structure, which is better improved in safety and use performance through the conductor shielding layer, the silicone rubber insulation layer, the insulation shielding layer and the metal shielding layer.

[0025] During implementation, the inner sheath layer and the outer sheath layer are both made of polyethylene sheath layer. The polyethylene sheath layer has low water absorption, good corrosion resistance, good chemical stability, and can extend the service life of the power cable. The overall protection performance is improved by setting the inner sheath layer and the outer sheath layer.

[0026] During implementation, the shielding layer is woven from tinned copper wires.

[0027] In implementation, the metal shielding layer is a copper tape shielding layer or a copper wire shielding layer. The outer surface of the copper wire shielding layer is tightly bound by reversely wrapped copper wires or copper tapes, and the copper tape shielding layer is composed of one or more layers of overlapping soft copper tapes.

[0028] During implementation, the insulating shielding layer is formed by extruding a semi-conductive shielding material on the outer side of the insulating layer.

[0029] 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 bending-resistant power cable, comprising three cable core monomers, characterized in that: Also included are a nylon skeleton and a scaled ring body; The nylon skeleton has three arc-shaped supporting grooves in the circumference, and the three cable core monomers are respectively arranged in the three supporting grooves. The zoom ring body includes at least three nylon plates with overlapping ends. The nylon plates are arranged in an arc shape. Along the same circumferential direction, the two ends of the nylon plates are respectively located on the outside and inside of the ends of two adjacent nylon plates. The outer side of the zoom ring body is covered with a cross-woven mesh layer of fiber ropes, the outer side of the woven mesh layer is extruded with an inner sheath layer, the outer side of the inner sheath layer is wrapped with a shielding layer, the outer side of the shielding layer is a woven steel belt armor layer, and the outer side of the steel belt armor layer is extruded with an outer sheath layer.

2. A bending-resistant power cable according to claim 1, characterized in that: The zoom ring body includes three nylon plates.

3. A bending-resistant power cable according to claim 2, characterized in that: The cable core monomer comprises a copper conductor, a conductor shielding layer extruded outside the copper conductor, a silicone rubber insulating layer extruded outside the conductor shielding layer, an insulating shielding layer extruded outside the silicone rubber insulating layer and a metal shielding layer extruded outside the insulating shielding layer.

4. The bending-resistant power cable according to claim 1, characterized in that: The inner sheath layer and the outer sheath layer are both made of polyethylene sheath layers.

5. The bending-resistant power cable according to claim 1, characterized in that: The shielding layer is woven from tinned copper wires.

6. The bending-resistant power cable according to claim 3, characterized in that: The metal shielding layer is a copper tape shielding layer or a copper wire shielding layer.

7. A bending-resistant power cable according to claim 6, characterized in that: The insulating shielding layer is extruded and wrapped on the outer side of the insulating layer with a semi-conductive shielding material.

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