Double-layer co-extrusion insulating sheath cable

Abstract

The utility model discloses a double-layer co-extrusion insulating sheath cable, which comprises a first shielding layer, and is characterized in that a coating layer is arranged outside the first shielding layer, a plurality of vertical steel wires are arranged in the coating layer, the plurality of vertical steel wires are uniformly distributed in the coating layer, a spiral steel wire is arranged in the coating layer, and the spiral steel wire is uniformly distributed in the coating layer. A second shielding layer is arranged outside the coating layer, an insulating sleeve is arranged inside the first shielding layer, a wire core is arranged inside the insulating sleeve, water-blocking yarn is wound outside the second shielding layer, two adjacent circles of lines of the water-blocking yarn are attached to each other, and the water-blocking yarn is wound outside the second shielding layer. According to the utility model, through arranging the vertical steel wires, the spiral steel wires and the coating layer, a reinforcing layer can be formed for the cable, thereby ensuring that the anti-pressure capability of the cable is more excellent when the cable is influenced by external force, and preventing the cable from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a double-layer co-extruded insulation sheathed cable. Background Art

[0002] Wires and cables are wire products used to transmit electrical (magnetic) energy, information and realize electromagnetic energy conversion. Wires and cables in a broad sense are also referred to as cables. Cables in a narrow sense refer to insulated cables, which can be defined as: a collection of the following parts; one or more insulated cores, and their respective coatings, total protective layers and outer sheaths.

[0003] Existing cables are generally made of oxygen-free copper core layer combined with polyethylene environmentally friendly insulation material. However, since the top of the cable is generally placed on the ground surface before use, when the outer wall or a part of the cable is subjected to a large pulling force during the construction process, it is easy to cause the cable to deform or the core layer inside the cable to be damaged. Utility Model Content

[0004] The utility model aims to provide a double-layer co-extruded insulated sheathed cable to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer co-extruded insulated sheathed cable, comprising a first shielding layer, characterized in that a covering layer is arranged outside the first shielding layer, a plurality of vertical steel wires are arranged inside the covering layer, the plurality of vertical steel wires are evenly distributed in the covering layer, a spiral steel wire is arranged inside the covering layer, and the spiral steel wire is wound around the outside of the plurality of vertical steel wires.

[0006] It can form a reinforcement layer for the cable, thereby ensuring that the cable has better pressure resistance when affected by external force and avoiding damage. When the cable is bent, the multiple vertical steel wires inside it can resist the longitudinal external force, while the spiral steel wires outside the multiple vertical steel wires can ensure that the wire core inside it will not be excessively deformed due to bending, effectively avoiding damage to the cable. Because the multiple vertical steel wires and spiral steel wires are inside the coating layer, these steel wires can be prevented from shifting with the use position, which is beneficial to increase the overall strength of the cable.

[0007] As a further preferred embodiment of the technical solution, a second shielding layer is arranged outside the covering layer, an insulating sleeve is arranged inside the first shielding layer, and a wire core is arranged inside the insulating sleeve.

[0008] As a further preferred embodiment of the technical solution, the second shielding layer is wrapped with water-blocking yarn on the outside, and two adjacent circles of the water-blocking yarn are arranged in close contact with each other.

[0009] As a further preferred embodiment of the present technical solution, the water-blocking yarn has an external fireproof layer and a wear-resistant layer, and the fireproof layer and the wear-resistant layer are bonded to each other.

[0010] The double-layer co-extrusion structure is adopted to save processing time, and the extruded layer has two characteristics, so that the cable has the characteristics of wear resistance and fire resistance. The wear-resistant layer can greatly increase the wear resistance of the cable, and the fire-proof layer can effectively prevent the external flame from spreading inward.

[0011] As a further preferred embodiment of the present technical solution, a plurality of reinforcement strips distributed at equal distances are arranged outside the wear-resistant layer.

[0012] As a further preferred embodiment of the present technical solution, the fireproof layer is made of chlorosulfonated polyethylene material.

[0013] As a further preferred embodiment of the present technical solution, the wear-resistant layer is made of butyl rubber material.

[0014] The utility model provides a double-layer co-extruded insulated sheathed cable, which has the following beneficial effects:

[0015] (1) The utility model can form a reinforcement layer for the cable by arranging vertical steel wires, spiral steel wires and a coating layer, thereby ensuring that the cable has better pressure resistance when subjected to external forces and avoiding damage. When the cable is bent, the multiple vertical steel wires therein can resist the longitudinal external force, while the spiral steel wires outside the multiple vertical steel wires can ensure that the wire core therein will not be excessively deformed due to bending, thereby effectively avoiding damage to the cable. The multiple vertical steel wires and spiral steel wires are located inside the coating layer, which can prevent these steel wires from shifting with the use position, thereby helping to increase the overall strength of the cable.

[0016] (2) The utility model provides a fireproof layer and a wear-resistant layer and adopts a double-layer co-extrusion structure, which is beneficial to saving processing time. The extruded layer has two characteristics, so that the cable has the characteristics of wear resistance and fire resistance. The wear-resistant layer can greatly increase the wear resistance of the cable, and the fireproof layer can effectively prevent external flames from spreading inward. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the water-blocking yarn structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the enlarged structure of the vertical steel wire and the spiral steel wire of the utility model;

[0020] Figure 4 For the utility model Figure 1The enlarged structural diagram at A in the middle;

[0021] In the figure: 1. wire core; 2. insulating sleeve; 3. first shielding layer; 4. vertical steel wire; 5. spiral steel wire; 6. coating layer; 7. second shielding layer; 8. water-blocking yarn; 9. fireproof layer; 10. wear-resistant layer; 11. reinforcement strip. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] The utility model provides a technical solution: Figure 2 and Figure 3 As shown, in this embodiment, a double-layer co-extruded insulated sheathed cable includes a first shielding layer 3, characterized in that: a covering layer 6 is arranged outside the first shielding layer 3, a plurality of vertical steel wires 4 are arranged inside the covering layer 6, the plurality of vertical steel wires 4 are evenly distributed in the covering layer 6, a spiral steel wire 5 is arranged inside the covering layer 6, and the spiral steel wire 5 is wound around the outside of the plurality of vertical steel wires 4.

[0024] When the cable is bent, the multiple vertical steel wires 4 therein can resist the longitudinal external force, while the spiral steel wires 5 outside the multiple vertical steel wires 4 can ensure that the wire core 1 therein will not be excessively deformed due to bending, thereby effectively avoiding damage to the cable. Because the multiple vertical steel wires 4 and the spiral steel wires 5 are inside the coating layer 6, these steel wires can be prevented from shifting with the use position, which is beneficial to increase the overall strength of the cable.

[0025] like Figure 2 and Figure 4 As shown, a second shielding layer 7 is arranged outside the sheathing layer 6, an insulating sleeve 2 is arranged inside the first shielding layer 3, and a wire core 1 is arranged inside the insulating sleeve 2.

[0026] The first shielding layer 3 and the second shielding layer 7 arranged outside the core 1 are two layers of barriers. On the one hand, they can increase the effect of cable shielding electromagnetic interference, and also ensure that when one of the shielding layers is damaged, the cable can still shield electromagnetic interference, which is beneficial to reduce the impact of the magnetic field on the cable.

[0027] like Figure 1 and Figure 2 As shown, the second shielding layer 7 is wrapped with a water-blocking yarn 8 on the outside, and two adjacent circles of the water-blocking yarn 8 are arranged in close contact with each other, wherein the water-blocking yarn 8 contains a material that can swell when in contact with water. When water enters from the cable end or from defects in the sheath, the material will swell rapidly when in contact with water to prevent the water from further diffusing along the longitudinal direction of the cable.

[0028] like Figure 1 and Figure 4As shown, the water-blocking yarn 8 has an external fireproof layer 9 and a wear-resistant layer 10, and the fireproof layer 9 and the wear-resistant layer 10 are bonded to each other. The fireproof layer 9 is made of chlorosulfonated polyethylene material, which has good thermal stability, insulation and fire resistance, and can effectively prevent the spread of flames. The wear-resistant layer 10 is made of butyl rubber material, which has the characteristics of good softness, excellent heat resistance, strong toughness, etc.

[0029] The outermost wear-resistant layer 10 and fire-proof layer 9 adopt a double-layer co-extrusion structure, and the two materials are coated on the outside of the cable at one time, so that the cable has the characteristics of wear resistance and fire resistance. The wear-resistant layer 10 can greatly increase the wear resistance of the cable, and the fire-proof layer 9 can effectively prevent external flames from spreading inward.

[0030] like Figure 1 As shown, a plurality of reinforcement strips 11 distributed at equal distances are arranged outside the wear-resistant layer 10 . The reinforcement strips 11 will first come into frictional contact with the outside, thereby further increasing the wear-resistant effect of the wear-resistant layer 10 .

[0031] The utility model provides a double-layer co-extruded insulated sheathed cable, the specific working principle of which is as follows:

[0032] When the device is working, when the cable is bent, the multiple vertical steel wires 4 inside it can resist the longitudinal external force, and the spiral steel wires 5 outside the multiple vertical steel wires 4 can ensure that the wire core 1 inside it will not be excessively deformed due to bending, effectively avoiding damage to the cable. The multiple vertical steel wires 4 and the spiral steel wires 5 are inside the coating layer 6, which can prevent these steel wires from shifting with the use position, which is beneficial to increase the overall strength of the cable.

[0033] The first shielding layer 3 and the second shielding layer 7 arranged outside the core 1 are two layers of barriers, which can increase the effect of shielding the cable from electromagnetic interference, and also ensure that when one of the shielding layers is damaged, the cable still has the effect of shielding electromagnetic interference, which is beneficial to reduce the influence of the magnetic field on the cable.

[0034] The outermost wear-resistant layer 10 and fire-proof layer 9 adopt a double-layer co-extrusion structure, and the two materials are coated on the outside of the cable at one time, so that the cable has the characteristics of wear resistance and fire resistance. The wear-resistant layer 10 can greatly increase the wear resistance of the cable, and the fire-proof layer 9 can effectively prevent external flames from spreading inward.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer co-extruded insulated sheathed cable, comprising a first shielding layer (3), characterized in that: A covering layer (6) is arranged outside the first shielding layer (3), a plurality of vertical steel wires (4) are arranged inside the covering layer (6), and the plurality of vertical steel wires (4) are evenly distributed in the covering layer (6), a spiral steel wire (5) is arranged inside the covering layer (6), and the spiral steel wire (5) is wound around the plurality of vertical steel wires (4).

2. A double-layer co-extruded insulated sheathed cable according to claim 1, characterized in that: A second shielding layer (7) is arranged outside the coating layer (6), an insulating sleeve (2) is arranged inside the first shielding layer (3), and a wire core (1) is arranged inside the insulating sleeve (2).

3. A double-layer co-extruded insulated sheathed cable according to claim 2, characterized in that: The second shielding layer (7) is wrapped with a water-blocking yarn (8) on the outside, and two adjacent turns of the water-blocking yarn (8) are arranged to fit each other.

4. A double-layer co-extruded insulated sheathed cable according to claim 3, characterized in that: The water-blocking yarn (8) has an external fireproof layer (9) and a wear-resistant layer (10), and the fireproof layer (9) and the wear-resistant layer (10) are bonded to each other.

5. A double-layer co-extruded insulated sheathed cable according to claim 4, characterized in that: The wear-resistant layer (10) is provided with a plurality of reinforcement strips (11) distributed at equal distances outside.

6. A double-layer co-extruded insulated sheathed cable according to claim 4, characterized in that: The fireproof layer (9) is made of chlorosulfonated polyethylene material.

7. A double-layer co-extruded insulated sheathed cable according to claim 4, characterized in that: The wear-resistant layer (10) is made of butyl rubber material.

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