Crosslinked polyethylene steel tape armored power cable

Abstract

A crosslinked polyethylene steel tape armored power cable disclosed by the present application comprises an outer sheath, an armored layer, an inner protection layer and a belting layer which are sequentially arranged from outside to inside, the belting layer is internally provided with a tensile unit, a plurality of inner-layer cable cores and a plurality of outer-layer cable cores, the tensile unit comprises a steel wire tensile rope and a tensile rope wrapping layer, and the tensile rope wrapping layer comprises a plurality of outer-layer cable cores and a plurality of outer-layer cable cores. The inner-layer cable core comprises a first conductor and a first insulating layer, the outer-layer cable core comprises a second conductor, a second insulating layer and a cable core wrapping layer, the outer side of the first insulating layer is provided with a plurality of strip-shaped convex rib parts, and the cable core wrapping layer is provided with a plurality of groove parts. The power cable is provided with a plurality of cable cores, so that the power transmission capacity is high, the inner-layer cable core and the outer-layer cable core can be nested, matched and installed and then wrapped, the roundness of the cross section of the cable is high, the cable can bear large pulling force through the steel wire tensile rope, the cable can bear large torsion through the steel tape armor layer, and the cable can be used as a high-voltage cable. Therefore, the device can be suitable for application scenes needing to bear tension and torsion.

Description

Technical Field

[0001] The utility model relates to the field of cables, and more specifically to a cross-linked polyethylene steel belt armored power cable. Background Art

[0002] Power cable, power cable is an electrical conductor used to transmit electricity from power plants or substations to various power consumption locations, such as factories, commercial buildings, residential areas, etc. Power cables are widely used in power systems, transportation, industrial production, construction engineering and other fields. They are one of the indispensable infrastructures in modern society and have promoted the development and progress of society.

[0003] Existing power cables have multiple cable cores, which are prone to displacement during actual use, affecting the transmission performance and safety of the cables. Some circular power cables have insufficient cross-sectional roundness, resulting in poor cable stability and making the cables difficult to arrange and bend during installation. Power cables need to withstand a certain amount of tension during use, especially during long-distance transmission and curved wiring. Insufficient tensile strength may cause the cable to break or stretch out of shape, thus affecting the service life and safety of the cable. Power cables may also be subject to external torsion during use. Insufficient torsion bearing capacity may cause the cable to twist, deform or break, affecting its transmission performance and safety. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and provides a cross-linked polyethylene steel belt armored power cable.

[0005] In order to achieve the above-mentioned object, the utility model provides the following technical solutions: a power cable, comprising an outer sheath, an armor layer, an inner sheath and a tape layer arranged in sequence from the outside to the inside, wherein a tensile unit, a plurality of inner cable cores and a plurality of outer cable cores are arranged in the tape layer, the plurality of inner cable cores are distributed in an annular shape and surround the tensile unit, the plurality of outer cable cores are respectively distributed in an annular shape and surround the plurality of inner cable cores, the tensile unit comprises a steel wire tensile rope and a tensile rope sheath covering the steel wire tensile rope, the cross section of the inner cable core is fan-shaped, the inner cable core is The core includes a first conductor and a first insulating layer covering the first conductor, the outer cable core includes a cable core sheath and a plurality of core wires covered by the cable core sheath, the core wire includes a second conductor and a second insulating layer covering the second conductor, the first and second insulating layers are both cross-linked polyethylene insulating layers, the outer side of the first insulating layer has a plurality of strip-shaped convex ribs, the cable core sheath has a groove portion matched with the strip-shaped convex ribs, the tape layer is a mica tape layer, the armor layer is a steel tape armor layer, and the outer sheath is made of polyvinyl chloride material.

[0006] Furthermore, the strip-shaped rib portion extends along the length direction of the cable.

[0007] Thereby, the inner and outer cable cores cooperate with the groove part so as to be tightly embedded and will not loosen during use.

[0008] Furthermore, the plurality of strip-shaped convex ribs on the first insulating layer are distributed in an arc shape with equal intervals.

[0009] Thereby, the internal structure of the cable is more stable.

[0010] Furthermore, each inner cable core has three strip-shaped convex ribs at the first insulating layer, and each outer cable core has three grooves at the cable core sheath.

[0011] Therefore, the groove portion of each outer cable core cooperates with the convex rib portions of the two inner cable cores, so that the inner cable cores and the outer cable cores are tightly connected.

[0012] Furthermore, the number of the inner cable core and the number of the outer cable core are both 6.

[0013] Furthermore, two adjacent inner cable cores abut against each other, and two adjacent outer cable cores abut against each other, both ends of the inner cable cores have a first abutting surface capable of abutting against the adjacent inner cable cores, and both ends of the outer cable cores have a second abutting surface capable of abutting against the adjacent outer cable cores.

[0014] This enables the adjacent inner and outer cable cores to form a tighter connection at the ends, further increasing the overall strength and stability of the cable.

[0015] Furthermore, the inner side of the inner cable core has a contact arc surface capable of contacting the anti-tension rope sheath.

[0016] This ensures a close bond between the inner cable core and the tensile unit.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The power cable of the present application has multiple inner cable cores and multiple outer cable cores, so that the number of cable cores is large and the power transmission capacity is strong. It can transmit multiple power lines at the same time, thereby enhancing the power transmission capacity. It is suitable for occasions requiring large-capacity power transmission, such as industrial plants, urban power grids, etc.

[0019] 2. In the power cable of the present application, the inner cable core and the outer cable core can be nested and wrapped after installation, ensuring their close connection during wrapping, and the roundness of the cable cross-section is high after the inner cable core and the outer cable core are combined, thereby improving the stability of the overall cable structure and extending the service life of the cable.

[0020] 3. The power cable of the present application has a steel wire tensile rope that enables the cable to withstand greater tension, and a steel belt armor layer that enables the cable to withstand greater torque, so that the cable can be suitable for application scenarios that need to withstand tension and torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the power cable structure;

[0022] Figure 2 This is an enlarged view of area A;

[0023] Figure 3 This is a cross-sectional view of a power cable.

[0024] Explanation of the reference numerals: 1.1 outer sheath; 1.2 armor layer; 1.3 inner sheath; 1.4 tape layer; 2.1 steel wire tensile rope; 2.2 tensile rope sheath; 3 inner cable core; 3.1 first conductor; 3.2 first insulating layer; 3.3 strip convex ribs; 4 outer cable core; 4.1 second conductor; 4.2 second insulating layer; 4.3 cable core sheath. 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 the embodiments. 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] The utility model provides Figure 1-3The cross-linked polyethylene steel belt armored power cable shown in the figure comprises an outer sheath 1.1, an armor layer 1.2, an inner sheath 1.3 and a tape layer 1.4 arranged in sequence from the outside to the inside, wherein a tensile unit, a plurality of inner cable cores 3 and a plurality of outer cable cores 4 are arranged in the tape layer 1.4, wherein the plurality of inner cable cores 3 are distributed in an annular shape and surround the tensile unit, and the plurality of outer cable cores 4 are distributed in an annular shape and surround the plurality of inner cable cores 3, wherein the tensile unit comprises a steel wire tensile rope 2.1 and a tensile rope sheath 2.2 covering the steel wire tensile rope 2.1, wherein the cross section of the inner cable core is fan-shaped, and the inner cable core 3 comprises a first conductor 3.1 and a sheath 2.2 covering the ... The first insulating layer 3.2 of the first conductor 3.1, the outer cable core 4 includes a cable core sheath 4.3 and a plurality of core wires covered by the cable core sheath 4.3, the core wires include a second conductor 4.1 and a second insulating layer 4.2 covering the second conductor 4.1, the first and second insulating layers are cross-linked polyethylene insulating layers, the outer side of the first insulating layer 3.2 has a plurality of strip convex ribs 3.3, the cable core sheath 4.3 has grooves matched with the strip convex ribs 3.3, the tape layer 1.4 is a mica tape layer, the armor layer 1.2 is a steel tape armor layer, and the outer sheath 1.1 is made of polyvinyl chloride material.

[0027] The strip convex ribs 3.3 extend along the length direction of the cable; the multiple strip convex ribs 3.3 at the first insulating layer 3.2 are distributed in an arc shape with equal intervals; each inner cable core 3 has three strip convex ribs 3.3 at the first insulating layer 3.2, and each outer cable core 4 has three grooves at the cable core sheath 4.3; the inner cable core 3 and the outer cable core 4 each have 6; two adjacent inner cable cores abut against each other, and two adjacent outer cable cores abut against each other, both ends of the inner cable core 3 have a first abutting surface that can abut against the adjacent inner cable cores, and both ends of the outer cable core 4 have a second abutting surface that can abut against the adjacent outer cable cores; the inner side of the inner cable core 3 has an abutting arc surface that can abut against the anti-tension rope sheath 2.2.

[0028] Working principle: The power cable of the present application has multiple inner cable cores and multiple outer cable cores, so that the number of cable cores is large and the power transmission capacity is strong. Multiple power lines can be transmitted at the same time, thereby enhancing the power transmission capacity. It is suitable for occasions that require large-capacity power transmission, such as industrial plants, urban power grids, etc. When the cable is subjected to external tension, the steel wire tensile rope can share the tension, prevent the cable from breaking or deforming, and ensure the stable operation of the cable under tension. The steel belt armor layer can provide the cable with better torsion resistance, enhance the cable structure, protect the internal conductor and insulation layer from damage, and ensure the normal use of the cable. Therefore, it can be suitable for application scenarios that need to withstand tension and torsion.

[0029] Specifically, multiple inner cable cores are first surrounded by the tensile unit, so that the inner side of the first insulation layer abuts against the tensile rope sheath, and then the outer cable core is installed. The three grooves of each outer cable core are matched with the convex ribs of the two inner cable cores. After the inner and outer cable cores are nested and installed, they are wrapped with mica tape to improve the fire resistance of the cable. Then the inner sheath, armor layer and outer sheath are made in sequence. The insulation layers of the inner and outer cable cores are made of cross-linked polyethylene material, which has excellent insulation performance and high temperature resistance, ensuring the safe and reliable operation of the cable in high temperature environments.

[0030] Although the present invention has been illustrated and described with respect to preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A cross-linked polyethylene steel belt armored power cable, characterized in that: The utility model comprises an outer sheath, an armor layer, an inner sheath and a tape layer which are arranged in sequence from the outside to the inside, wherein a tensile unit, a plurality of inner cable cores and a plurality of outer cable cores are arranged in the tape layer, the plurality of inner cable cores are distributed in an annular manner and surround the tensile unit, the plurality of outer cable cores are arranged in an annular manner and surround the plurality of inner cable cores, the tensile unit comprises a steel wire tensile rope and a tensile rope sheath which covers the steel wire tensile rope, the cross section of the inner cable core is fan-shaped, the inner cable core comprises a first conductor and a first insulating layer which covers the first conductor, the outer cable core comprises a cable core sheath and a plurality of core wires covered by the cable core sheath, the core wire comprises a second conductor and a second insulating layer which covers the second conductor, the first and second insulating layers are both cross-linked polyethylene insulating layers, the outer side of the first insulating layer has a plurality of strip-shaped convex ribs, the cable core sheath has a groove part which cooperates with the strip-shaped convex ribs, the tape layer is a mica tape layer, the armor layer is a steel belt armor layer, and the outer sheath is made of polyvinyl chloride material.

2. The cross-linked polyethylene steel tape armored power cable according to claim 1, characterized in that: The strip-shaped rib portion extends along the length direction of the cable.

3. The cross-linked polyethylene steel tape armored power cable according to claim 1, characterized in that: The plurality of strip-shaped convex ribs on the first insulating layer are distributed in an arc shape with equal intervals.

4. The cross-linked polyethylene steel tape armored power cable according to claim 1, characterized in that: Each inner cable core has three strip-shaped convex ribs at the first insulating layer, and each outer cable core has three grooves at the cable core sheath.

5. The cross-linked polyethylene steel tape armored power cable according to claim 1, characterized in that: The number of the inner cable core and the number of the outer cable core are both 6.

6. The cross-linked polyethylene steel tape armored power cable according to claim 1, characterized in that: Two adjacent inner cable cores abut against each other, and two adjacent outer cable cores abut against each other. Both ends of the inner cable cores have a first abutting surface that can abut against the adjacent inner cable cores, and both ends of the outer cable cores have a second abutting surface that can abut against the adjacent outer cable cores.

7. The cross-linked polyethylene steel tape armored power cable according to claim 1, characterized in that: The inner side of the inner cable core has a contact arc surface capable of contacting the anti-tension rope sheath.

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