Low-temperature high-voltage power cable

Abstract

The utility model relates to the field of power cables, and discloses a low-temperature high-voltage power cable, which comprises a cold-resistant filler, a plurality of transmission protection copper sleeves are uniformly and fixedly connected to the inner periphery of the cold-resistant filler, and transmission conductors are fixedly connected to the inner sides of the transmission protection copper sleeves. The outer side of the cold-resistant filler is fixedly connected with a cold-resistant insulating layer, the outer side of the cold-resistant insulating layer is fixedly connected with a compression-resistant supporting layer, the outer side of the compression-resistant supporting layer is fixedly connected with a protective cold-resistant layer, and a plurality of compression-resistant supporting assemblies are evenly installed in the protective cold-resistant layer. And the outer side of the protective cold-resistant layer is fixedly connected with a wear-resistant protective layer. According to the utility model, cold-resistant protection can be carried out on the cable, the cable can be prevented from working normally in a low-temperature environment, the external overall wear-resistant effect is better, the cable can be prevented from being damaged by impact due to too severe external environment, and the transmission stability of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the field of power cables, in particular to a low-temperature and high-voltage power cable. Background Art

[0002] High-voltage power cables are cables used to transmit high-voltage electricity and are usually used in power transmission and distribution systems. They usually consist of a conductor, an insulation layer, a conductive shielding layer, a metal sheath, and an outer sheath. The conductor is usually made of copper or aluminum, the insulation layer and the conductive shielding layer are used to prevent current leakage and external interference, the metal sheath is used to prevent electromagnetic interference and mechanical damage, and the outer sheath is used to protect the entire cable structure.

[0003] After searching, a low-temperature resistant power cable with announcement number CN208538533U includes a cable core, a cable through-tube and a protective tube, wherein the cable core is arranged in the cable through-tube, the protective tube is arranged on the outside of the cable through-tube, the cable core is composed of a plurality of conductors, one of which is arranged in the middle, and the other conductors are in a ring structure surrounding the conductor arranged in the middle, and there is a gap between each conductor, an insulating layer is arranged on the outside of each conductor, a first insulation layer is arranged on the outside of the wire through-tube, a steel belt armor layer is arranged on the outside of the first insulation layer, a pressure-sensitive structural tape is wrapped around the periphery of the steel belt armor layer, and the protective tube is arranged on the outside of the pressure-sensitive structural tape; the utility model has a simple structure and has good low-temperature resistance and strength;

[0004] Based on the above patent, the background technology of the equipment mentioned in the background technology operates in a low temperature environment. Conventional cables will lose elasticity, crack and break, and cannot withstand repeated movement or bending. The conductor will leak and pose a safety hazard. In response to this technical problem, this application proposes a low-temperature high-voltage power cable. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a low-temperature and high-voltage power cable with strong low-temperature and pressure resistance.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A low-temperature high-voltage power cable comprises a cold-resistant filler, wherein a plurality of transmission protection copper sleeves are evenly and fixedly connected inside the cold-resistant filler, transmission conductors are fixedly connected inside the transmission protection copper sleeves, a cold-resistant insulation layer is fixedly connected outside the cold-resistant filler, a compression-resistant support layer is fixedly connected outside the cold-resistant insulation layer, a protective cold-resistant layer is fixedly connected outside the compression-resistant support layer, a plurality of compression-resistant support components are evenly installed inside the protective cold-resistant layer, and a wear-resistant protective layer is fixedly connected outside the protective cold-resistant layer. The wear-resistant protective layer is coated with a polyurethane coating on the outside.

[0008] Furthermore, the compression-resistant support assembly includes a plurality of installation grooves located outside the protective cold-resistant layer, a plurality of through-slot grooves are provided inside the installation grooves, the inner side of the protective cold-resistant layer is provided with nesting grooves located inside the through-slot grooves, the interior of the installation grooves is fixedly connected with a support ring, a plurality of connecting support columns are evenly fixedly connected around the inner side of the support ring, and the inner side of the connecting support columns is fixedly connected with a support arc plate.

[0009] Furthermore, the exterior of the connecting support column corresponds to and is fixedly connected to the interior of the slot.

[0010] Furthermore, the outsides of the supporting arc pieces are respectively fixedly connected to the insides of the nesting grooves, and the inner sides of the supporting arc pieces are respectively fitted to the outsides of the compression-resistant supporting layers.

[0011] Furthermore, the cold-resistant filler is polymer gel.

[0012] Furthermore, the cold-resistant insulating layer is a fluoroplastic layer.

[0013] Furthermore, the protective cold-resistant layer is a polyurethane foam layer.

[0014] Furthermore, the wear-resistant protective layer is a nitrile rubber layer.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, the cold-resistant protection of the power cable is completed by cold-resistant fillers, protective cold-resistant layers, cold-resistant insulating layers, protective cold-resistant layers, wear-resistant protective layers, and polyurethane coatings. Not only can the cables be protected from cold to prevent them from failing to work properly in low temperature environments, but the overall external wear resistance is also better.

[0017] 2. In the utility model, the compression resistance of the cable is achieved by protecting the cold-resistant layer, supporting arc pieces, supporting rings, mounting grooves, insertion slots, nesting grooves, compression-resistant supporting layers, and connecting supporting columns, thereby avoiding damage to the cable due to impact caused by an excessively harsh external environment and improving the stability of cable transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an overall diagram of a low-temperature high-voltage power cable proposed by the utility model;

[0019] Figure 2 This is a cross-sectional view of a low-temperature high-voltage power cable proposed by the utility model;

[0020] Figure 3 This is a diagram of a protective cold-resistant layer assembly mechanism for a low-temperature high-voltage power cable proposed by the utility model;

[0021] Figure 4 This is a diagram of a protective cold-resistant layer structure of a low-temperature high-voltage power cable proposed by the utility model;

[0022] Figure 5 The present invention is a diagram of a support ring mechanism for a low-temperature high-voltage power cable.

[0023] Legend:

[0024] 1. Cold-resistant filler; 2. Cold-resistant insulation layer; 3. Compression-resistant support layer; 4. Protective cold-resistant layer; 5. Wear-resistant protective layer; 6. Polyurethane coating; 7. Transmission protection copper sleeve; 8. Transmission conductor; 9. Support ring; 10. Support arc piece; 11. Installation groove; 12. Nesting groove; 13. Through-slot groove; 14. Connecting support column. 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] Reference Figure 1 and Figure 2 The utility model provides an embodiment: a low-temperature high-voltage power cable, comprising a cold-resistant filler 1, a plurality of transmission protection copper sleeves 7 are evenly fixedly connected to the inside of the cold-resistant filler 1, a transmission conductor 8 is fixedly connected to the inner side of the transmission protection copper sleeve 7, a cold-resistant insulation layer 2 is fixedly connected to the outer side of the cold-resistant insulation layer 2, a compression support layer 3 is fixedly connected to the outer side of the compression support layer 3, a protective cold-resistant layer 4 is fixedly connected to the outer side, a plurality of compression support components are evenly installed inside the protective cold-resistant layer 4, a wear-resistant protective layer 5 is fixedly connected to the outer side of the protective cold-resistant layer 4. The outer side of the wear-resistant protective layer 5 is coated with a polyurethane coating 6, the cold-resistant filler 1 is a polymer gel, the cold-resistant insulation layer 2 is a fluoroplastic layer, the protective cold-resistant layer 4 is a polyurethane foam layer, and the wear-resistant protective layer 5 is a nitrile rubber layer;

[0027] The external air contacts the surface of the wear-resistant protective layer 5. The wear-resistant protective layer 5 has good wear resistance in low temperature environment and blocks the cold air outside. The excessively low temperature outside passes through the wear-resistant protective layer 5 into the protective cold-resistant layer 4. The protective cold-resistant layer 4 is relatively thick. The polyurethane foam has good thermal insulation performance, which can effectively reduce energy conduction, and keep the internal temperature of the cable warm to avoid the loss caused by the transmission conductor 8 during transmission. The cold-resistant insulating layer 2 has a certain cold resistance to ensure the normal use of the insulation and avoid cracking caused by low temperature. It can not only protect the cable from cold and prevent the cable from failing to work normally in a low temperature environment, but also has a better overall external wear resistance.

[0028] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 The compressive support assembly includes a plurality of mounting grooves 11 located outside the protective cold-resistant layer 4, a plurality of through-slots 13 are provided inside the mounting grooves 11, and a nesting groove 12 is provided inside the through-slots 13 on the inner side of the protective cold-resistant layer 4, and a support ring 9 is fixedly connected inside the mounting grooves 11, and a plurality of connecting support columns 14 are evenly fixedly connected around the inner side of the support ring 9, and a supporting arc piece 10 is fixedly connected to the inner side of the connecting support column 14, and the outer sides of the connecting support columns 14 are respectively fixedly connected to the inner sides of the through-slots 13, and the outer sides of the supporting arc pieces 10 are respectively fixedly connected to the inner sides of the nesting grooves 12, and the inner sides of the supporting arc pieces 10 are respectively correspondingly fitted to the outer sides of the compressive support layer 3;

[0029] The pressure generated externally acts on the outside of the wear-resistant protective layer 5, and the pressure generated externally is transmitted inwardly and directly acts on the outside of the support ring 9. The pressure generated externally is dispersed by multiple support rings 9, and the pressure will be transmitted to the inside of the support arc piece 10 through the connecting support column 14. The pressure generated inward by the support arc piece 10 will be offset by the compressive support layer 3, further improving the compressive resistance of the cable, avoiding damage to the cable due to impact caused by an excessively harsh external environment, and improving the stability of the cable transmission.

[0030] Working principle: external air contacts the surface of the wear-resistant protective layer 5. The wear-resistant protective layer 5 has good wear resistance in low temperature environment and blocks the cold air outside. The excessively low temperature outside passes through the wear-resistant protective layer 5 into the protective cold-resistant layer 4. The protective cold-resistant layer 4 is relatively thick. The polyurethane foam has good thermal insulation performance and can effectively reduce energy conduction. The internal temperature of the cable is insulated to avoid the loss caused by the transmission conductor 8 during transmission. The cold-resistant insulating layer 2 has a certain cold resistance to ensure the normal use of the insulation and avoid cracking caused by low temperature. The pressure generated by the outside acts on the outside of the wear-resistant protective layer 5. The pressure generated by the outside is transmitted inwardly and directly acts on the outside of the support ring 9. The pressure generated by the outside is dispersed by multiple support rings 9, and the pressure will be transmitted to the inside of the support arc piece 10 through the connecting support column 14. The pressure generated inward by the support arc piece 10 will be offset by the compressive support layer 3, thereby further improving the compressive resistance of the cable.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-temperature high-voltage power cable, comprising a cold-resistant filler (1), characterized in that: The cold-resistant filler (1) is evenly and fixedly connected with a plurality of transmission protection copper sleeves (7) around its interior, and the transmission protection copper sleeves (7) are all fixedly connected with transmission conductors (8) on their inner sides. The cold-resistant filler (1) is fixedly connected with a cold-resistant insulation layer (2) on its outer side, and a pressure-resistant support layer (3) is fixedly connected with the outer side of the cold-resistant insulation layer (2). The pressure-resistant support layer (3) is fixedly connected with a protective cold-resistant layer (4) on its outer side. The protective cold-resistant layer (4) is evenly and fixedly installed with a plurality of pressure-resistant support components, and the protective cold-resistant layer (4) is fixedly connected with a wear-resistant protective layer (5) on its outer side. The wear-resistant protective layer (5) is coated with a polyurethane coating (6) on its outer side.

2. A low temperature and high voltage power cable according to claim 1, characterized in that: The compression-resistant support assembly comprises a plurality of installation grooves (11) located outside the protective cold-resistant layer (4), a plurality of through-slots (13) are provided inside the installation grooves (11), a nesting groove (12) is provided inside the through-slots (13) on the inner side of the protective cold-resistant layer (4), a support ring (9) is fixedly connected inside the installation grooves (11), a plurality of connecting support columns (14) are evenly fixedly connected around the inner side of the support ring (9), and a supporting arc sheet (10) is fixedly connected to the inner side of the connecting support column (14).

3. A low temperature high voltage power cable according to claim 2, characterized in that: The exterior of the connecting support column (14) is respectively fixedly connected to and inserted into the interior of the slot (13).

4. A low temperature and high voltage power cable according to claim 2, characterized in that: The outside of the supporting arc piece (10) is respectively fixedly connected to the inside of the nesting groove (12), and the inside of the supporting arc piece (10) is respectively fitted to the outside of the compression-resistant supporting layer (3).

5. A low temperature and high voltage power cable according to claim 1, characterized in that: The cold-resistant filler (1) is a polymer gel.

6. A low temperature and high voltage power cable according to claim 1, characterized in that: The cold-resistant insulating layer (2) is a fluoroplastic layer.

7. A low temperature and high voltage power cable according to claim 1, characterized in that: The protective cold-resistant layer (4) is a polyurethane foam layer.

8. The low-temperature high-voltage power cable according to claim 1, characterized in that: The wear-resistant protective layer (5) is a nitrile rubber layer.

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