Tensile polyvinyl chloride steel tape armored power cable

Abstract

The utility model discloses a tensile polyvinyl chloride steel tape armored power cable, which sequentially comprises a polyvinyl chloride outer sheath, a steel tape armored layer, an inner protection layer and a mica belting layer from outside to inside, and is characterized in that a central tensile rope, a plurality of first cable cores, a plurality of second cable cores and a plurality of third cable cores are arranged in the mica belting layer. The power cable is provided with the plurality of first cable cores, the plurality of second cable cores and the plurality of third cable cores, so that the number of the cable cores is large, and the power transmission effect is good. The plurality of cable cores are reasonably distributed, the structure is compact, the roundness of the cable is high, and the pressure-resistant and tensile effects are good. Moreover, the power cable is provided with the mica belting layer, the flame-retardant layer and the flame-retardant filling ropes, so that the flame-retardant performance of the cable is good, and the damage of flame to the internal structure of the cable is effectively delayed.

Description

Technical Field

[0001] The utility model relates to the field of cables, and more specifically to a tensile-resistant polyvinyl chloride steel belt armored power cable. Background Art

[0002] In modern society, power cables have become an indispensable part of the power system. They are widely used in urban distribution networks, industrial facilities, construction, power transmission lines, and renewable energy. With the acceleration of urbanization and the continuous advancement of industrialization, the demand for power cables is also increasing.

[0003] Traditional power cables, due to their limited number of cores, can suffer from low power transmission efficiency, failing to meet the demands of modern power systems for high-capacity, high-efficiency transmission. While some power cables feature multiple cores, their irrational distribution leads to a loose overall structure and insufficient roundness, compromising the cable's pressure and tensile strength. This makes the cables susceptible to damage from various external forces during use. Furthermore, in emergency situations such as fires, the flame retardancy of traditional power cables can be insufficient, causing flames to spread rapidly within the cable, damaging the cable structure and even causing greater disasters. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and provides a tensile-resistant polyvinyl chloride steel belt armored power cable.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a power cable, comprising, from the outside to the inside, a polyvinyl chloride outer sheath, a steel tape armor layer, an inner sheath and a mica tape layer, wherein a central tensile rope, a plurality of first cable cores, a plurality of second cable cores and a plurality of third cable cores are arranged in the mica tape layer, the plurality of first cable cores surround the plurality of second cable cores and the plurality of third cable cores, and the plurality of second cable cores and the plurality of third cable cores jointly surround the central tensile rope, the cross-sections of the first and second cable cores are both fan-shaped, the cross-section of the third cable core is circular, the second cable core and the third cable core are alternately distributed, and a flame-retardant filling rope is arranged between adjacent second and third cable cores, the first cable core comprises a first insulating layer and two cores located in the first insulating layer, the core comprises a first conductor and a flame-retardant layer covering the first conductor, the second cable core comprises a second conductor and a second insulating layer covering the second conductor, and the third cable core comprises a third conductor and a third insulating layer covering the third conductor.

[0006] Furthermore, the flame-retardant filling rope includes a first arc portion abutting against the first cable core, a flat portion abutting against the second cable core, and a second arc portion abutting against the third cable core.

[0007] This results in a good filling effect and high cable roundness.

[0008] Furthermore, the second insulating layer has a groove portion capable of abutting against the central tensile cord.

[0009] As a result, the internal structure of the cable is compact and the connection is tight.

[0010] Furthermore, the flame retardant layer is a low-smoke halogen-free flame retardant layer.

[0011] Therefore, the flame retardant effect is good and no harmful gas is generated.

[0012] Furthermore, the first cable cores have three, and the second cable cores and the third cable cores each have two.

[0013] As a result, the cable has a large number of cable cores and a good power transmission effect.

[0014] Furthermore, the first insulation layer, the second insulation layer, and the third insulation layer are all made of polyethylene insulation layers.

[0015] Thereby providing better insulation performance for the cable.

[0016] Furthermore, the cross-section of the power cable is circular.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The power cable of the present application has multiple first cable cores, multiple second cable cores and multiple third cable cores, so that the number of cable cores is large and the power transmission effect is good.

[0019] 2. The power cable of the present application has multiple cable cores reasonably distributed, a compact structure, and a high cable roundness, thereby having good pressure and tensile resistance.

[0020] 3. The power cable of the present application has a polyvinyl chloride outer sheath, a mica tape layer, a flame retardant layer, and a flame retardant filling rope, so that the cable has good flame retardant performance, thereby effectively delaying the damage of the flame to the internal structure of the cable. 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 A cross-sectional view of a power cable.

[0024] Explanation of the reference numerals: PVC outer sheath 1; steel tape armor layer 2; inner sheath 3; mica tape layer 4; central tensile rope 5; first cable core 6; first conductor 6.1; flame retardant layer 6.2; first insulating layer 6.3; second cable core 7; second conductor 7.1; second insulating layer 7.2; third cable core 8; third conductor 8.1; third insulating layer 8.2; flame retardant filling rope 9. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The utility model provides Figure 1-3 The tensile strength PVC steel tape armored power cable shown in the figure comprises, from the outside to the inside, a PVC outer sheath 1, a steel tape armor layer 2, an inner sheath 3 and a mica tape layer 4. The mica tape layer 4 is provided with a central tensile rope 5, a plurality of first cable cores 6, a plurality of second cable cores 7 and a plurality of third cable cores 8. The plurality of first cable cores 6 surround the plurality of second cable cores 7 and the plurality of third cable cores 8. The plurality of second cable cores 7 and the plurality of third cable cores 8 jointly surround the central tensile rope 5. The cross-sections of the first and second cable cores are both fan-shaped, the cross-section of the third cable core 8 is circular, and the The second cable cores 7 and the third cable cores 8 are distributed alternately, and a flame-retardant filling rope 9 is arranged between adjacent second cable cores 7 and third cable cores 8. The first cable core 6 includes a first insulating layer 6.3 and two wire cores located in the first insulating layer 6.3. The wire core includes a first conductor 6.1 and a flame-retardant layer 6.2 covering the first conductor 6.1. The second cable core 7 includes a second conductor 7.1 and a second insulating layer 7.2 covering the second conductor 7.1. The third cable core 8 includes a third conductor 8.1 and a third insulating layer 8.2 covering the third conductor 8.1.

[0027] The flame-retardant filling rope 9 includes a first curved portion that abuts the first cable core 6, a flat portion that abuts the second cable core 7, and a second curved portion that abuts the third cable core 8. The second insulating layer 7.2 has a groove that can abut the central tensile rope 5. The flame-retardant layer 6.2 is a low-smoke, halogen-free flame-retardant layer. The first cable core 6 has three, while the second and third cable cores 7 and 8 each have two. The first, second, and third insulating layers 6.3, 7.2, and 8.2 are all polyethylene insulation layers. The cross-section of the power cable is circular.

[0028] Working Principle: The power cable of this application comprises multiple first cable cores, multiple second cable cores, and multiple third cable cores, resulting in a large number of cable cores and excellent power transmission performance. The multiple cable cores are rationally distributed, resulting in a compact structure and high cable roundness, thus providing excellent compressive and tensile strength. Furthermore, the power cable of this application comprises a mica tape layer, a flame-retardant layer, and a flame-retardant filler rope, resulting in excellent flame-retardant properties, effectively delaying flame damage to the cable's internal structure.

[0029] During specific production, the prepared second cable core and third cable core are firstly alternately distributed to surround the central tensile rope, then multiple first cable cores are surrounded by the second and third cable cores, and at the same time, the gap between the second and third cable cores is filled with flame-retardant filling ropes, and then the cable core and the central tensile rope are wrapped with a mica tape layer, and then an inner protective layer is prepared outside the mica tape layer, a steel belt armor layer is prepared outside the inner protective layer, and a polyvinyl chloride outer sheath is prepared outside the steel belt armor layer.

[0030] Although the present invention has been illustrated and described with respect to preferred embodiments, it will 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 tensile strength polyvinyl chloride steel tape armored power cable, characterized in that: From the outside to the inside, it includes a polyvinyl chloride outer sheath, a steel belt armor layer, an inner protective layer and a mica tape layer. The mica tape layer is provided with a central tensile rope, multiple first cable cores, multiple second cable cores and multiple third cable cores. The multiple first cable cores surround the multiple second cable cores and the multiple third cable cores. The multiple second cable cores and the multiple third cable cores jointly surround the central tensile rope. The cross-sections of the first and second cable cores are fan-shaped, and the cross-section of the third cable core is circular. The second cable core and the third cable core are alternately distributed. A flame-retardant filling rope is provided between adjacent second and third cable cores. The first cable core includes a first insulating layer and two cores located in the first insulating layer. The core includes a first conductor and a flame-retardant layer covering the first conductor. The second cable core includes a second conductor and a second insulating layer covering the second conductor. The third cable core includes a third conductor and a third insulating layer covering the third conductor.

2. The tensile strength polyvinyl chloride steel tape armored power cable according to claim 1, characterized in that: The flame-retardant filling rope includes a first arc portion abutting against the first cable core, a flat portion abutting against the second cable core, and a second arc portion abutting against the third cable core.

3. The tensile strength polyvinyl chloride steel tape armored power cable according to claim 1, characterized in that: The second insulating layer has a groove portion capable of abutting against the central tensile cord.

4. The tensile strength polyvinyl chloride steel tape armored power cable according to claim 1, characterized in that: The flame retardant layer is a low-smoke halogen-free flame retardant layer.

5. The tensile strength polyvinyl chloride steel tape armored power cable according to claim 1, characterized in that: The first cable cores have three pieces, and the second cable cores and the third cable cores each have two pieces.

6. The tensile strength polyvinyl chloride steel tape armored power cable according to claim 1, characterized in that: The first insulating layer, the second insulating layer and the third insulating layer are all made of polyethylene insulating layers.

7. The tensile strength polyvinyl chloride steel tape armored power cable according to claim 1, characterized in that: The cross section of the power cable is circular.

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