Irradiation cross-linked polyolefin high-temperature-resistant special cable

Abstract

The utility model discloses an irradiation crosslinking polyolefin high-temperature-resistant special cable, which comprises a plurality of wire cores, the plurality of wire cores are mutually wound, the outer side ends of the wire cores are coated with semi-conductive belt layers, the outer side ends of the semi-conductive belt layers of the wire cores are coated with shielding layers, the plurality of wire cores are positioned in the shielding layers, and the shielding layers are arranged in the shielding layers. A filling layer is arranged in a gap between the shielding layer and the wire core, a reinforcing layer is arranged at the outer side end of the shielding layer, an insulating layer wraps the outer side end of the reinforcing layer, a plurality of circular grooves are formed in one end of the insulating layer at equal intervals, and the grooves penetrate through the insulating layer and are communicated with the inner wall of the insulating layer. The anti-impact performance of the cable is improved through the grooves, impact on the cable is buffered, the connection strength between the insulating layer and the shielding layer is improved through the reinforcing layer, the overall tensile performance of the cable is enhanced, and meanwhile the flexibility of the cable is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a radiation cross-linked polyolefin high-temperature resistant special cable. Background Art

[0002] Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multi-strand wires and insulation layers, used to connect circuits, electrical appliances, etc. Special cables are cables with special uses that can be used in specific occasions. Special cables can be resistant to high temperatures, acids and alkalis, and termites, as well as wires and cables used in ships, aircraft, nuclear power plants, etc.

[0003] The various structures in commonly used cables are usually directly connected using adhesive. When the adhesive is squeezed, it will spread in all directions, making the adhesive thinner. This results in limited structural connection strength in the cable, and when the cable is impacted, it can only be buffered by the cable's own material, which limits the cable's impact resistance. Utility Model Content

[0004] The utility model aims to provide a radiation cross-linked polyolefin high temperature resistant special cable, which can change the structure in the cable to improve the impact resistance of the cable, increase the friction of the inner wall of the insulation layer, and improve the connection strength of the structure in the cable.

[0005] In order to achieve the above-mentioned purpose, a radiation cross-linked polyolefin high temperature resistant special cable is provided, comprising: a core, a plurality of cores are provided, and the plurality of cores are intertwined, the outer end of the core is coated with a semi-conductive tape layer, the outer end of the semi-conductive tape layer of the core is wrapped with a shielding layer, and the plurality of cores are located in the shielding layer, a filling layer is provided in the gap between the shielding layer and the core, a reinforcement layer is provided at the outer end of the shielding layer, the outer end of the reinforcement layer is wrapped with an insulating layer, and a plurality of circular grooves are equidistantly provided at one end of the insulating layer, and the grooves penetrate the insulating layer and are connected to the inner wall of the insulating layer. The structure in the cable can be changed to improve the impact resistance of the cable, increase the friction of the inner wall of the insulating layer, and improve the connection strength of the structure in the cable.

[0006] According to the radiation cross-linked polyolefin high temperature resistant special cable, the outer end of the insulation layer is wrapped with a protective sheath, which is used to protect the outer end of the cable, improve the wear resistance of the cable, and extend the service life of the cable.

[0007] According to the irradiated cross-linked polyolefin high temperature resistant special cable, the filling layer is made of spinning wheel material. The spinning wheel has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, insulation, anti-aging, long life cycle, stable chemical structure, no melting droplets during combustion, and no toxic gas generation, so as to improve the cable performance.

[0008] According to the radiation cross-linked polyolefin high temperature resistant special cable, the reinforcement layer is a net with diamond mesh made of low-density polyethylene material and wrapped around the outer end of the shielding layer, and the opening of the reinforcement layer is filled with glue to store the glue, ensure the thickness of the glue, and improve the connection strength between the insulation layer and the shielding layer.

[0009] According to the radiation cross-linked polyolefin high temperature resistant special cable, the protective sleeve is glued onto the outer end of the insulating layer to fix the protective sleeve and the insulating layer to prevent the protective sleeve from detaching from the cable.

[0010] The above scheme has the beneficial effects of improving the impact resistance of the cable through the groove, buffering the impact on the cable, increasing the friction of the inner wall of the insulation layer, and using the reinforcement layer to improve the connection strength between the insulation layer and the shielding layer, thereby enhancing the overall tensile performance of the cable and ensuring the flexibility of the cable.

[0011] 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

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0013] Figure 1 This is a three-dimensional structural diagram of a radiation cross-linked polyolefin high-temperature resistant special cable of the utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of a radiation cross-linked polyolefin high temperature resistant special cable of the utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the insulation layer of a radiation cross-linked polyolefin high-temperature resistant special cable of the utility model;

[0016] Figure 4 for Figure 2 Enlarged structural diagram of point A in the middle.

[0017] Legend:

[0018] 1. Protective cover; 2. Insulation layer; 3. Wire core; 4. Filling layer; 5. Groove; 6. Shielding layer; 7. Semi-conductive tape layer; 8. Reinforcement layer. DETAILED DESCRIPTION

[0019] 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.

[0020] Reference Figure 1-4 The utility model embodiment is a radiation cross-linked polyolefin high temperature resistant special cable, which includes: a core 3, characterized in that a plurality of cores 3 are provided, and the plurality of cores 3 are intertwined, the outer end of the core 3 is coated with a semi-conductive tape layer 7, the outer end of the semi-conductive tape layer 7 of the core 3 is wrapped with a shielding layer 6, and the plurality of cores 3 are located in the shielding layer 6, a filling layer 4 is provided in the gap between the shielding layer 6 and the core 3, a reinforcement layer 8 is provided at the outer end of the shielding layer 6, the outer end of the reinforcement layer 8 is wrapped with an insulating layer 2, and a plurality of circular grooves 5 are equidistantly provided at one end of the insulating layer 2, and the grooves 5 penetrate the insulating layer 2 and are connected to the inner wall of the insulating layer 2.

[0021] The outer end of the insulating layer 2 is wrapped with a protective cover 1 .

[0022] The filling layer 4 is made of spinning wheel material.

[0023] The reinforcing layer 8 is a net with diamond-shaped meshes made of low-density polyethylene and wrapped around the outer end of the shielding layer 6 , and the openings of the reinforcing layer 8 are filled with adhesive.

[0024] The protective cover 1 is attached to the outer side of the insulating layer 2 by adhesive.

[0025] Working principle: When in use, the adhesive used for fixing the connection between the insulating layer 2 and the shielding layer 6 is located in the mesh of the reinforcing layer 8, so that the adhesive thickness at each location between the insulating layer 2 and the shielding layer 6 is the same, ensuring the connection strength between the insulating layer 2 and the shielding layer 6, thereby improving the tensile effect of the cable, and due to the mesh reinforcing layer 8, the cable maintains good flexibility. When the cable is hit by an external object during use, the insulating layer 2 is compressed, and at the same time, the groove 5 on the inner wall of the insulating layer 2 is deformed, which cushions the impact on the cable and improves the impact resistance of the cable.

[0026] 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 radiation cross-linked polyolefin high temperature resistant special cable, comprising: A wire core (3), characterized in that a plurality of wire cores (3) are provided, and the plurality of wire cores (3) are intertwined, the outer end of the wire core (3) is coated with a semi-conductive tape layer (7), the outer end of the semi-conductive tape layer (7) of the wire core (3) is wrapped with a shielding layer (6), and the plurality of wire cores (3) are located inside the shielding layer (6), a filling layer (4) is provided in the gap between the shielding layer (6) and the wire core (3), a reinforcing layer (8) is provided at the outer end of the shielding layer (6), the outer end of the reinforcing layer (8) is wrapped with an insulating layer (2), and a plurality of circular grooves (5) are equidistantly provided at one end of the insulating layer (2), and the grooves (5) penetrate the insulating layer (2) and are connected to the inner wall of the insulating layer (2).

2. The radiation cross-linked polyolefin high temperature resistant special cable according to claim 1, characterized in that: The outer end of the insulating layer (2) is wrapped with a protective sleeve (1).

3. The radiation cross-linked polyolefin high temperature resistant special cable according to claim 1, characterized in that: The filling layer (4) is made of spinning wheel material.

4. The radiation cross-linked polyolefin high temperature resistant special cable according to claim 1, characterized in that: The reinforcing layer (8) is a net with diamond-shaped meshes made of low-density polyethylene material and is wrapped around the outer end of the shielding layer (6), and the openings of the reinforcing layer (8) are filled with adhesive.

5. The radiation cross-linked polyolefin high temperature resistant special cable according to claim 2, characterized in that: The protective cover (1) is covered on the outer end of the insulating layer (2) by adhesive.

Images