High-temperature-resistant anti-cracking power cable

Abstract

The utility model discloses a high temperature resistant anti-cracking power cable, which comprises a main elastic core, a wire core and an auxiliary elastic core, the main elastic core is arranged at the central position of the cable, the wire core is arranged around the main elastic core, the auxiliary elastic core is arranged around the main elastic core, and the auxiliary elastic core and the wire core are arranged at an interval; an insulating layer is arranged on the outer side of the wire core, a shielding layer is arranged on the outer side of the insulating layer, a high-temperature-resistant layer is arranged on the outer side of the shielding layer, an armor layer is arranged on the outer side of the high-temperature-resistant layer, and a sheath layer is arranged on the outer side of the armor layer. The high-temperature-resistant anti-cracking power cable provided by the utility model is simple in structure and practical in function, and effectively solves the problem that the service life of the cable is affected to a certain extent due to poor bending resistance of the existing high-temperature-resistant anti-cracking power cable.

Description

Technical Field

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

[0002] Power cables are cables used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, power station lead-out lines, internal power supplies for industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electrical energy in the trunk lines of power systems, including power cables with various voltage levels of 1-500kV and above, and various insulations. Existing power cables have improved their high-temperature resistance under the action of a high-temperature resistant layer, allowing the power cables to work normally in high-temperature environments and preventing the power cables from cracking easily when working in high-temperature environments. However, the power cable has poor bending resistance, which affects the service life of the cable to a certain extent. Therefore, how to develop a new type of high-temperature resistant and crack-resistant power cable has become a problem that needs to be solved urgently by technicians in this field. Utility Model Content

[0003] The purpose of the utility model is to provide a high temperature resistant and crack resistant power cable, which solves the problem that the existing high temperature resistant and crack resistant power cables have poor anti-bending ability, which affects the service life of the cables to a certain extent.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The utility model discloses a high-temperature resistant and crack-proof power cable, comprising a main elastic core, a wire core and a secondary elastic core, wherein the main elastic core is arranged at the center of the cable, the wire core is arranged around the main elastic core, the secondary elastic core is arranged around the main elastic core, and the secondary elastic core is spaced apart from the wire core; an insulating layer is arranged on the outside of the wire core, a shielding layer is arranged on the outside of the insulating layer, a high-temperature resistant layer is arranged on the outside of the shielding layer, and an armor layer is arranged on the outside of the high-temperature resistant layer.

[0006] Furthermore, the cross section of the main elastic core is circular.

[0007] Furthermore, the surface of the secondary elastic core facing the wire core is a curved surface.

[0008] Furthermore, the number of the secondary elastic cores is the same as the number of the wire cores.

[0009] Furthermore, a sheath layer is provided on the outside of the armor layer.

[0010] Furthermore, the shielding layer includes a first shielding layer and a second shielding layer, the second shielding layer is arranged on the outside of the first shielding layer, and a second filling layer is arranged between the first shielding layer and the second shielding layer.

[0011] Furthermore, a first filling layer is provided between the main elastic core and the insulating layer.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are:

[0013] This new high-temperature resistant and crack-resistant power cable effectively improves the cable's bending resistance by providing a primary elastic core and a secondary elastic core, effectively extending the cable's overall lifespan. The combined effects of the high-temperature resistant layer and the armor layer effectively enhance the cable's crack resistance at high temperatures. Overall, this new high-temperature resistant and crack-resistant power cable boasts a simple structure and practical functionality, effectively resolving the issue of existing high-temperature resistant and crack-resistant power cables, which suffer from poor bending resistance and, to a certain extent, shorten their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 This is a cross-sectional view of the high-temperature resistant and crack-proof power cable of the utility model.

[0016] Explanation of the accompanying drawings: 1. Main elastic core; 2. Wire core; 3. First filling layer; 4. Insulation layer; 5. First shielding layer; 6. Second filling layer; 7. Second shielding layer; 8. High temperature resistant layer; 9. Armor layer; 10. Sheath layer; 11. Secondary elastic core. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, a high temperature resistant and crack resistant power cable comprises a main elastic core 1, a wire core 2 and an auxiliary elastic core 11. The main elastic core 1 and the auxiliary elastic core 11 are made of TPE material.

[0018] The main elastic core 1 is disposed at the center of the cable and has a circular cross-section. The core 2 is disposed around the main elastic core 1, and the secondary elastic cores 11 are disposed around the main elastic core 1. The number of secondary elastic cores 11 is the same as the number of cores 2. The secondary elastic cores 11 are spaced apart from the core 2. The surface of the secondary elastic core 11 facing the core 2 is a curved surface. This prevents the secondary elastic core 11 from damaging the core 2.

[0019] An insulating layer 4 is provided on the outer side of the wire core 2 , and a first filling layer 3 is provided between the main elastic core 1 and the insulating layer 4 .

[0020] A shielding layer is provided on the outside of the insulating layer 4. The shielding layer is formed by wrapping beryllium copper soft elastic sheets. The shielding layer includes a first shielding layer 5 and a second shielding layer 7. The second shielding layer 7 is provided on the outside of the first shielding layer 5. A second filling layer 6 is provided between the first shielding layer 5 and the second shielding layer 7.

[0021] The first filling layer 3 and the second filling layer 6 are made of low-smoke halogen-free flame-retardant filling rope.

[0022] A high temperature resistant layer 8 is provided on the outside of the shielding layer, and an armor layer 9 is provided on the outside of the high temperature resistant layer 8. The armor layer 9 is made of double-layer galvanized steel strip.

[0023] A sheath layer 10 is provided on the outside of the armor layer 9. The sheath layer 10 is made of halogen-free, low-smoke, flame-retardant polyolefin.

[0024] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A high temperature resistant and crack resistant power cable, characterized by: The cable comprises a main elastic core (1), a wire core (2) and a secondary elastic core (11), wherein the main elastic core (1) is arranged at the center of the cable, the wire core (2) is arranged around the main elastic core (1), the secondary elastic core (11) is arranged around the main elastic core (1), and the secondary elastic core (11) and the wire core (2) are arranged at intervals; an insulating layer (4) is arranged on the outside of the wire core (2), a shielding layer is arranged on the outside of the insulating layer (4), a high-temperature resistant layer (8) is arranged on the outside of the shielding layer, and an armor layer (9) is arranged on the outside of the high-temperature resistant layer (8).

2. The high temperature resistant and crack resistant power cable according to claim 1, characterized in that: The cross section of the main elastic core (1) is circular.

3. The high temperature resistant and crack resistant power cable according to claim 1, characterized in that: The surface of the auxiliary elastic core (11) facing the wire core (2) is a curved surface.

4. The high temperature resistant and crack resistant power cable according to claim 1, characterized in that: The number of the auxiliary elastic cores (11) is the same as the number of the wire cores (2).

5. The high temperature resistant and crack resistant power cable according to claim 1, characterized in that: A sheath layer (10) is provided on the outer side of the armor layer (9).

6. The high temperature resistant and crack resistant power cable according to claim 1, characterized in that: The shielding layer comprises a first shielding layer (5) and a second shielding layer (7), wherein the second shielding layer (7) is arranged outside the first shielding layer (5), and a second filling layer (6) is arranged between the first shielding layer (5) and the second shielding layer (7).

7. The high temperature resistant and crack resistant power cable according to claim 1, characterized in that: A first filling layer (3) is provided between the main elastic core (1) and the insulating layer (4).

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