Cross-linked polyethylene sheath fire-resistant power cable

Abstract

The utility model discloses a cross-linked polyethylene sheath fire-resistant power cable, which comprises an outer sheath, the inner side of the outer sheath is provided with a fire-resistant layer, the inner side of the fire-resistant layer is provided with a pressure-resistant unit, the pressure-resistant unit comprises a plurality of wire cores, the plurality of wire cores are fixedly connected to the inner side of the fire-resistant layer, and the inner side of the fire-resistant layer is provided with a cross-linked polyethylene sheath. A pressure-resistant plate is fixedly connected between the two wire cores, connecting holes are formed in the outer sides of the pressure-resistant plate, stabilizing ribs are fixedly connected to the inner sides of the connecting holes, reinforcing ribs are fixedly connected to the outer sides of the wire cores, supporting rods are fixedly connected between the reinforcing ribs, and the outer sheath is made of a crosslinked polyethylene material. And the pressure-resistant plate is made of an aluminum alloy material. By arranging the pressure-resistant plates, the reinforcing ribs, the supporting rods, the wire cores and the stabilizing ribs, the pressure-resistant performance of the multiple wire cores is improved, the influence of external pressure on the multiple wire cores is reduced, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cross-linked polyethylene sheathed fire-resistant power cable. Background Art

[0002] Cable is a device used to transmit electrical energy or signals. It is usually composed of several or several groups of insulated wires and has a protective outer layer. Power cables are mainly used to transmit and distribute electrical energy. They are commonly found in urban underground power grids, power station lead lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas.

[0003] An outer sheath is provided on the outside of the power cable, which is convenient for protecting the wire cores inside the cable. However, the power cable has poor compression resistance, which can easily damage multiple wire cores inside and affect the normal use of the power cable. Utility Model Content

[0004] In order to overcome the disadvantage of poor compression resistance of cables in the prior art, one of the purposes of the utility model is to provide a cross-linked polyethylene sheathed fire-resistant power cable.

[0005] One of the purposes of the utility model is achieved by the following technical solution: A cross-linked polyethylene sheathed fire-resistant power cable, comprising an outer sheath: a fire-resistant layer is arranged on the inner side of the outer sheath, and a pressure-resistant unit is arranged on the inner side of the fire-resistant layer;

[0006] The pressure-resistant unit includes a plurality of wire cores, and the plurality of wire cores are fixedly connected to the inner side of the fire-resistant layer, a pressure-resistant plate is fixedly connected between two of the wire cores, a connecting hole is provided on the outer side of the pressure-resistant plate, a stabilizing rib is fixedly connected to the inner side of the connecting hole, a reinforcing rib is fixedly connected to the outer side of the wire core, and support rods are fixedly connected between the reinforcing ribs, the outer sheath is made of cross-linked polyethylene material, and the pressure-resistant plate is made of aluminum alloy material.

[0007] According to the cross-linked polyethylene sheathed fire-resistant power cable, a first filler is provided between the compression plate and the fire-resistant layer, and a second filler is provided between the reinforcing rib and the compression plate.

[0008] According to the cross-linked polyethylene sheathed fire-resistant power cable, the first filler is made of calcium oxide material, and the second filler is made of magnesium oxide material, thereby increasing the compression resistance of the cable.

[0009] According to the cross-linked polyethylene sheathed fire-resistant power cable, the compression plate is arranged in an arc-shaped structure.

[0010] According to the cross-linked polyethylene sheathed fire-resistant power cable, the fire-resistant layer is made of polyimide material.

[0011] Beneficial effects:

[0012] 1. By providing compression plates, reinforcing ribs, support rods, wire cores, and stabilizing ribs, it is convenient to increase the compression resistance of multiple wire cores, reduce the impact of external pressure on multiple wire cores, and increase the service life of the cable.

[0013] 2. The fire-resistant layer, filler 1 and filler 2 are provided to increase the fire-resistant performance of the cable.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is the overall three-dimensional structure diagram of a cross-linked polyethylene sheathed fire-resistant power cable of the utility model;

[0017] Figure 2 The utility model is a three-dimensional structural diagram of a compression unit in a cross-linked polyethylene sheathed fire-resistant power cable.

[0018] Legend:

[0019] 1. Outer sheath; 2. Fire-resistant layer; 3. Filler 1; 4. Filler 2; 5. Compression-resistant unit; 501. Wire core; 502. Compression-resistant plate; 503. Reinforcement rib; 504. Support rod; 505. Connection hole; 506. Stabilization rib. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-2 A cross-linked polyethylene sheathed fire-resistant power cable comprises an outer sheath 1: a fire-resistant layer 2 is arranged on the inner side of the outer sheath 1, a pressure-resistant unit 5 is arranged on the inner side of the fire-resistant layer 2, and the fire-resistant layer 2 increases the fire-resistant performance of the cable.

[0022] The pressure-resistant unit 5 includes a plurality of wire cores 501, which are fixedly connected to the inner side of the fire-resistant layer 2, a pressure-resistant plate 502 is fixedly connected between two wire cores 501, a connection hole 505 is provided on the outer side of the pressure-resistant plate 502, a stabilizing rib 506 is fixedly connected to the inner side of the connection hole 505, a reinforcing rib 503 is fixedly connected to the outer side of the wire core 501, and a support rod 504 is fixedly connected between the reinforcing ribs 503. The outer sheath 1 is made of cross-linked polyethylene material, the pressure-resistant plate 502 is made of aluminum alloy material, the pressure-resistant plate 502 is arranged in an arc-shaped structure, and a filling is arranged between the pressure-resistant plate 502 and the fire-resistant layer 2. A filler 3, a filler 2 4 is arranged between the reinforcing rib 503 and the pressure-resistant plate 502, the filler 3 is made of calcium oxide material, the filler 2 4 is made of magnesium oxide material, and the fire-resistant layer 2 is made of polyimide material, wherein the pressure-resistant plate 502 and a plurality of support rods 504 are arranged to increase the pressure resistance of a plurality of cores 501, and the stabilizing rib 506 inside the pressure-resistant plate 502 is used to increase the pressure resistance of the pressure-resistant plate 502 to external pressure, and at the same time, the cable is preliminarily fire-resistant through the fire-resistant layer 2, and the cable is doubly fire-resistant through the filler 3 and the filler 2 4, thereby increasing the fire resistance of the cable.

[0023] Working principle: When in use, the overall compression resistance of the cable core 501 is increased through the compression plate 502, the reinforcing ribs 503, the support rod 504 and the stabilizing ribs 506, and the fire resistance of the cable is increased through the fire-resistant layer 2, the filler 1 3 and the filler 2 4.

[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A cross-linked polyethylene sheathed fire-resistant power cable, characterized in that: It comprises an outer sheath (1), wherein a fire-resistant layer (2) is arranged on the inner side of the outer sheath (1), and a pressure-resistant unit (5) is arranged on the inner side of the fire-resistant layer (2); The pressure-resistant unit (5) comprises a plurality of wire cores (501), wherein the plurality of wire cores (501) are fixedly connected to the inner side of the fire-resistant layer (2), a pressure-resistant plate (502) is fixedly connected between two of the wire cores (501), a connection hole (505) is provided on the outer side of the pressure-resistant plate (502), a stabilizing rib (506) is fixedly connected to the inner side of the connection hole (505), a reinforcing rib (503) is fixedly connected to the outer side of the wire core (501), and support rods (504) are fixedly connected between the reinforcing ribs (503), the outer sheath (1) is made of a cross-linked polyethylene material, and the pressure-resistant plate (502) is made of an aluminum alloy material.

2. A cross-linked polyethylene sheathed fire-resistant power cable according to claim 1, characterized in that: A filler 1 (3) is provided between the compression-resistant plate (502) and the fire-resistant layer (2), and a filler 2 (4) is provided between the reinforcing rib (503) and the compression-resistant plate (502).

3. A cross-linked polyethylene sheathed fire-resistant power cable according to claim 2, characterized in that: The filler 1 (3) is made of calcium oxide material, and the filler 2 (4) is made of magnesium oxide material.

4. A cross-linked polyethylene sheathed fire-resistant power cable according to claim 1, characterized in that: The compression-resistant plate (502) is arranged in an arc-shaped structure.

5. The cross-linked polyethylene sheathed fire-resistant power cable according to claim 1, characterized in that: The fire-resistant layer (2) is made of polyimide material.

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