Efficient shielding polyvinyl chloride sheath power cable

Abstract

The utility model discloses an efficient shielding polyvinyl chloride sheath power cable which sequentially comprises an outer sheath, an armor layer, an outer wrapping layer and an inner wrapping layer from outside to inside, the outer sheath is a polyvinyl chloride outer sheath, the outer wrapping layer is an aluminum-plastic composite belt wrapping layer, the inner wrapping layer is a flame-retardant belt wrapping layer, and the armor layer is arranged between the outer sheath and the inner wrapping layer. A central skeleton, a plurality of first cable core units and a plurality of second cable core units are arranged in the inner wrapping layer. The power cable is provided with the aluminum-plastic composite belt wrapping layer, the inner semiconductor shielding layer, the outer semiconductor shielding layer and the soft copper belt layer, so that the cable has a good shielding effect, and the stability of power transmission can be ensured. And the structure of the central skeleton, the first cable core unit and the second cable core unit enables the cable to have good roundness and good mechanical performance, so that when the cable is pressed by external force, the cable core units can be protected from being damaged. In addition, due to the fact that the cable is provided with the first cable core units and the second cable core units, the power transmission capacity of the cable is high.

Description

Technical Field

[0001] The utility model relates to the field of cables, and more specifically, to a high-efficiency shielded PVC sheathed power cable. Background Art

[0002] Power cables play a crucial role in power transmission and distribution. Power cables transport electricity from sources such as power stations and substations to various user terminals, ensuring the stability and reliability of power supply. With the rapid development of industrialization and urbanization, the demand for electricity shows a rapid growth trend, and the application scope of power cables is also expanding day by day.

[0003] Traditional power cables have deficiencies in shielding and cannot effectively resist external electromagnetic interference or prevent internal signal radiation. This may lead to attenuation or distortion during signal transmission, and even interfere with surrounding electronic devices, causing trouble to users. The roundness of some power cables is not enough, which will lead to a decrease in the mechanical strength of the cable. When the cable is subjected to external forces, it is more likely to be damaged, affecting the performance of the cable. In addition, the power transmission capacity of some power cables is often limited by their structure and it is difficult to meet the high-load power transmission requirements. Summary of the Utility Model

[0004] The utility model aims to overcome the defects of the prior art and provides a high-efficiency shielded PVC sheathed power cable.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A power cable, which sequentially includes an outer sheath, an armor layer, an outer wrapping layer and an inner wrapping layer from outside to inside. The outer sheath is a PVC outer sheath, the outer wrapping layer is an aluminum-plastic composite tape wrapping layer, the inner wrapping layer is a flame-retardant tape wrapping layer. Inside the inner wrapping layer, there are arranged a central skeleton, a plurality of first cable core units and a plurality of second cable core units. The plurality of first cable core units surround the central skeleton. The number of the first cable core units is the same as that of the second cable core units. The first cable core units and the second cable core units are alternately distributed. Each first cable core unit sequentially includes a first conductor, an inner semiconductor shielding layer, a first insulating layer, a semiconductor shielding layer and a first inner sheath from inside to outside. Each second cable core unit includes a second inner sheath and a plurality of wire cores located inside the second inner sheath. Each wire core sequentially includes a second conductor, a second insulating layer, a flame-retardant layer and a soft copper tape layer from inside to outside.

[0006] Further, there are three first cable core units and three second cable core units respectively. The cross-section of the central skeleton has three first arc edges and three second arc edges. The cross-section of the first inner sheath includes a third arc edge, a fourth arc edge and two first straight edges. The cross-section of the second inner sheath includes a fifth arc edge, a sixth arc edge, two seventh arc edges and two second straight edges. The three first arc edges of the central skeleton respectively abut against the third arc edges of the three first cable core units, and the three second arc edges respectively abut against the sixth arc edges of the three second cable core units. The fourth arc edge and the fifth arc edge can both abut against the inner wrapping layer, the first straight edge can abut against the second straight edge, and the seventh arc edge can abut against the third arc edge.

[0007] Thus, the central skeleton, the first cable core unit and the second cable core unit endow the cable with good roundness and good mechanical properties.

[0008] Further, there is an installation through-hole at the central skeleton, and a first tensile rope is installed at the installation through-hole.

[0009] Thus, the tensile property of the cable is improved.

[0010] Further, a second tensile rope is arranged inside the second inner sheath.

[0011] Thus, the tensile property of the cable is further improved.

[0012] Further, the armor layer is a steel wire armor layer.

[0013] Thus, the mechanical property of the cable is improved.

[0014] Further, the central skeleton extends along the length direction of the power cable.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The power cable of the present application has an aluminum-plastic composite tape wrapping layer, an inner semiconductor shielding layer, an outer semiconductor shielding layer and a soft copper tape layer. Thus, the cable has a good shielding effect and can ensure the stability of power transmission.

[0017] 2. For the power cable of the present application, the structures of the central skeleton, the first cable core unit and the second cable core unit endow the cable with good roundness and good mechanical properties. Thus, when the cable is subjected to external pressure, the cable core units can be protected from damage.

[0018] 3. The power cable of the present application has a plurality of first cable core units and a plurality of second cable core units. Thus, the power transmission capacity is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the power cable;

[0020] Figure 2 It is a schematic diagram of the first perspective of a power cable;

[0021] Figure 3 It is a schematic diagram of the second perspective of a power cable;

[0022] Figure 4 It is an enlarged view of area A;

[0023] Figure 5 It is an enlarged view of area B.

[0024] Description of reference numerals: outer sheath 1; armor layer 2; outer wrapping layer 3; inner wrapping layer 4; central skeleton 5; first tensile rope 5.1; first arc edge 5.2; second arc edge 5.3; first cable core unit 6; first conductor 6.1; inner semiconductor shielding layer 6.2; first insulating layer 6.3; semiconductor shielding layer 6.4; first inner sheath 6.5; third arc edge 6.6; fourth arc edge 6.7; first straight edge 6.8; second cable core unit 7; second conductor 7.1; second insulating layer 7.2; flame retardant layer 7.3; soft copper tape layer 7.4; second inner sheath 7.5; second tensile rope 7.6; fifth arc edge 7.7; sixth arc edge 7.8; seventh arc edge 7.9; second straight edge 7.10. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] The present invention provides as Figures 1-5An efficient shielding PVC sheathed power cable as shown, from outside to inside, successively includes an outer sheath 1, an armor layer 2, an outer wrapping layer 3 and an inner wrapping layer 4. The outer sheath 1 is a PVC outer sheath, the outer wrapping layer 3 is an aluminum-plastic composite tape wrapping layer, the inner wrapping layer 4 is a flame-retardant tape wrapping layer. Inside the inner wrapping layer, there are arranged a central skeleton 5, a plurality of first cable core units 6 and a plurality of second cable core units 7. The plurality of first cable core units 6 surround the central skeleton 5. The number of the first cable core units 6 and the second cable core units 7 is the same, and the first cable core units 6 and the second cable core units 7 are alternately distributed. The first cable core unit 6 successively includes a first conductor 6.1, an inner semiconductor shielding layer 6.2, a first insulating layer 6.3, a semiconductor shielding layer 6.4 and a first inner sheath 6.5 from inside to outside. The second cable core unit 7 includes a second inner sheath 7.5 and a plurality of wire cores located inside the second inner sheath 7.5. The wire cores successively include a second conductor 7.1, a second insulating layer 7.2, a flame-retardant layer 7.3 and a soft copper tape layer 7.4 from inside to outside.

[0027] Both the first cable core units 6 and the second cable core units 7 have three. The cross-section of the central skeleton 5 has three first arc edges 5.2 and three second arc edges 5.3. The cross-section of the first inner sheath 6.5 includes a third arc edge 6.6, a fourth arc edge 6.7 and two first straight edges 6.8. The cross-section of the second inner sheath 7.5 includes a fifth arc edge 7.7, a sixth arc edge 7.8, two seventh arc edges 7.9 and two second straight edges 7.10. The three first arc edges 5.2 of the central skeleton 5 respectively abut against the third arc edges 6.6 of the three first cable core units 6, and the three second arc edges 5.3 respectively abut against the sixth arc edges 7.8 of the three second cable core units 7. The fourth arc edge 6.7 and the fifth arc edge 7.7 can both abut against the inner wrapping layer 4. The first straight edge 6.8 can abut against the second straight edge 7.10, and the seventh arc edge 7.9 can abut against the third arc edge 6.6. There is an installation through-hole at the central skeleton 5, and a first tensile rope 5.1 is installed at the installation through-hole. A second tensile rope 7.6 is arranged inside the second inner sheath 7.5. The armor layer 2 is a steel wire armor layer. The central skeleton 5 extends along the length direction of the power cable.

[0028] Working principle: The power cable of this application has an aluminum-plastic composite tape wrapping layer, an inner semiconductor shielding layer, an outer semiconductor shielding layer and a soft copper tape layer, so that the cable has a good shielding effect and can ensure the stability of power transmission. And the structures of the central skeleton, the first cable core units and the second cable core units make the cable have a good roundness and good mechanical properties. Thus, when the cable is subjected to external pressure, it can protect the cable core units from damage. In addition, due to having a plurality of first cable core units and a plurality of second cable core units, the power transmission capacity of the cable is strong.

[0029] During actual production, the first cable core unit and the second cable core unit are alternately arranged around the central skeleton to ensure equal quantity and uniform distribution. An aluminum-plastic composite tape is wrapped around the cable core units, so as to ensure that the central skeleton, the first cable core unit and the second cable core unit are tightly combined together, thereby improving the shielding performance and mechanical strength of the cable. Then, a flame-retardant tape is wrapped around the aluminum-plastic composite tape wrapping layer to enhance the flame-retardant performance of the cable. Then, a steel wire armor layer is made on the outer side of the flame-retardant tape wrapping layer to improve the compression resistance, tensile resistance and impact resistance of the cable. Finally, a polyvinyl chloride outer sheath is extruded on the outer side of the armor layer to complete the external protection of the cable.

[0030] Although the preferred embodiments of the present invention have been illustrated and described, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. High-efficiency shielded PVC sheathed power cable, characterized in that, From outside to inside, it successively includes an outer sheath, an armor layer, an outer wrapping layer, and an inner wrapping layer. The outer sheath is a polyvinyl chloride outer sheath. The outer wrapping layer is an aluminum-plastic composite tape wrapping layer. The inner wrapping layer is a flame-retardant tape wrapping layer. Inside the inner wrapping layer, there are arranged a central skeleton, a plurality of first cable core units, and a plurality of second cable core units. The plurality of first cable core units surround the central skeleton. The number of the first cable core units is the same as that of the second cable core units. The first cable core units and the second cable core units are alternately distributed. The first cable core unit successively includes a first conductor, an inner semiconductor shielding layer, a first insulating layer, a semiconductor shielding layer, and a first inner sheath from inside to outside. The second cable core unit includes a second inner sheath and a plurality of cores located inside the second inner sheath. The core successively includes a second conductor, a second insulating layer, a flame-retardant layer, and a soft copper tape layer from inside to outside.

2. The high-efficiency shielding PVC sheathed power cable according to claim 1, wherein There are three first cable core units and three second cable core units. The cross-section of the central skeleton has three first arc edges and three second arc edges. The cross-section of the first inner sheath includes a third arc edge, a fourth arc edge, and two first straight edges. The cross-section of the second inner sheath includes a fifth arc edge, a sixth arc edge, two seventh arc edges, and two second straight edges. The three first arc edges of the central skeleton respectively abut against the third arc edges of the three first cable core units. The three second arc edges respectively abut against the sixth arc edges of the three second cable core units. The fourth arc edge and the fifth arc edge can both abut against the inner wrapping layer. The first straight edge can abut against the second straight edge. The seventh arc edge can abut against the third arc edge.

3. The high-efficiency shielded PVC sheathed power cable according to claim 1, characterized in that, There is an installation through-hole at the central skeleton, and a first tensile rope is installed at the installation through-hole.

4. The high-efficiency shielding PVC sheathed power cable according to claim 1, characterized in that A second tensile rope is arranged inside the second inner sheath.

5. The high-efficiency shielding PVC sheathed power cable according to claim 1, wherein The armor layer is a steel wire armor layer.

6. The high-efficiency shielding PVC sheathed power cable according to claim 1, wherein The central skeleton extends along the length direction of the power cable.

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