Double-layer insulating fire-resistant cable

Abstract

The utility model discloses a double-layer insulation fire-resistant cable which comprises a plurality of cable cores, a shielding layer is arranged outside the cable cores, the shielding layer is made of a copper wire belt material, a filling layer is arranged outside the shielding layer, an insulation sleeve is arranged in the middle of the filling layer, an elastic steel wire rope is arranged inside the insulation sleeve, and the elastic steel wire rope is arranged inside the elastic steel wire rope. An elastic layer is arranged on the outer side of the filling layer, a first fireproof layer is arranged on the outer side of the elastic layer, an insulating layer is arranged on the outer side of the first fireproof layer, and a second fireproof layer is arranged on the outer side of the insulating layer. According to the utility model, through the design of the elastic steel wire rope, the structural strength of the cable can be improved, the elasticity of the internal structure of the cable can be improved in cooperation with the insulation sleeve, the bending resistance and compression resistance of the cable are better, and through the design of the elastic layer, the structural elasticity of the cable can be further improved. The bending resistance and the compression resistance are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a double-layer insulated fire-resistant cable. Background Art

[0002] Cables are usually rope-like cables made of several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and often twisted around a center. The entire outside is covered with a highly insulating covering. Cables have the characteristics of being energized inside and insulated outside. Cables include power cables, compensating cables, shielded cables, voltage-resistant 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 multiple strands of wires and an insulating layer, used to connect circuits, electrical appliances, etc., and are used in different occasions.

[0003] The utility model patent with announcement number CN206194419U discloses a wear-resistant cable, which includes at least four cores, each of which is provided with a drainage wire. The wear-resistant cable is provided with a wear-resistant layer, an armor layer and a sheath layer from the inside to the outside, and fillers and isolation supports are evenly arranged between the cores. The core includes a conductor, an insulation layer and a shielding layer. The number of the conductors is at least one, and the conductor is a tinned copper conductor. The insulation layer is made of cross-linked polyethylene material. The thickness of the wear-resistant layer is 0.2-0.25mm, and the shielding layer is woven from mica tape. A cylindrical wear-resistant bracket is provided in the middle of the wear-resistant cable, and the thickness of the armor layer is 0.1-0.25mm. The patent has a simple and compact structure, good cable flexibility, good wear resistance, and low cost, which is convenient for large-scale popularization and application.

[0004] During use, the cable in the above patent has insufficient elasticity of the cable structure, and the cable bending or compression may easily cause damage and short circuit of the internal cable core, which affects the use of the cable, and the insulation and fireproof effect of the cable is also insufficient. Therefore, improvements are needed. Utility Model Content

[0005] The utility model aims to provide a double-layer insulated fire-resistant cable, which solves the problem that the internal cable core is easily damaged and short-circuited due to cable bending or pressure, and also solves the problem that the insulation fireproof effect of the cable is insufficient.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer insulated fire-resistant cable, comprising a plurality of cable cores, a shielding layer is arranged on the outside of the cable core, the shielding layer is made of copper wire belt, a filling layer is arranged on the outside of the shielding layer, an insulating sleeve is arranged in the middle of the filling layer, an elastic steel wire rope is arranged inside the insulating sleeve, an elastic layer is arranged on the outside of the filling layer, a first fireproof layer is arranged on the outside of the elastic layer, an insulating layer is arranged on the outside of the first fireproof layer, and a second fireproof layer is arranged on the outside of the insulating layer.

[0007] Preferably, the filling layer is made of vulcanized rubber. By designing the filling layer, the structural elasticity and insulation effect can be improved.

[0008] Preferably, the elastic layer is made of ceramic silicone rubber. By designing the elastic layer, the elasticity and strength of the internal structure of the cable can be further improved.

[0009] Preferably, the first fireproof layer is made of asbestos. By designing the first fireproof layer, the fireproof effect of the cable can be improved.

[0010] Preferably, the insulating layer is made of cross-linked polyethylene. By designing the insulating layer, the insulation performance of the cable can be further improved.

[0011] Preferably, the second fireproof layer is made of flame-retardant polyolefin. By designing the second fireproof layer, the outer surface of the cable has good fireproof, corrosion-resistant and crack-resistant effects.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model can improve the strength of the cable structure by designing the elastic steel wire rope, and at the same time, with the effect of the insulating sleeve, it can improve the elasticity of the internal structure of the cable, so that the cable has better bending and compression resistance. By designing the elastic layer, the elasticity of the cable structure can be further improved, and the bending and compression resistance can be further improved.

[0014] 2. The utility model can provide insulation and protection for the internal cable core by designing the filling layer. At the same time, the insulation effect of the cable can be further improved by cooperating with the insulating layer, and the safety of cable use can be improved. Through the effects of the first fireproof layer and the second fireproof layer, the cable has good fireproof and flame-retardant effects. At the same time, the second fireproof layer is made of flame-retardant polyolefin material and has good corrosion resistance and anti-cracking effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 For this utility model Figure 1A cutaway perspective view of

[0017] Figure 3 For this utility model Figure 1 A top sectional view of .

[0018] In the figure: 1. cable core; 2. shielding layer; 3. filling layer; 4. insulating sleeve; 5. elastic steel wire rope; 6. elastic layer; 7. first fireproof layer; 8. insulating layer; 9. second fireproof layer. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1 , Figure 2 , Figure 3 A double-layer insulated fire-resistant cable comprises a plurality of cable cores 1. A shielding layer 2 is arranged on the outside of the cable core 1. The shielding layer 2 is made of a copper ribbon. A filling layer 3 is arranged on the outside of the shielding layer 2. The filling layer 3 is made of a vulcanized rubber material. By designing the filling layer 3, the structural elasticity and insulation effect can be improved. An insulating sleeve 4 is arranged in the middle of the filling layer 3. An elastic steel wire rope 5 is arranged inside the insulating sleeve 4. An elastic layer 6 is arranged on the outside of the filling layer 3. The elastic layer 6 is made of a ceramic silicone rubber material. By designing the elastic layer 6, the elasticity and strength of the internal structure of the cable can be further improved.

[0021] See also Figure 1 , Figure 2 , Figure 3 A first fireproof layer 7 is arranged on the outside of the elastic layer 6. The first fireproof layer 7 is made of asbestos. By designing the first fireproof layer 7, the fireproof effect of the cable can be improved. An insulating layer 8 is arranged on the outside of the first fireproof layer 7. The insulating layer 8 is made of cross-linked polyethylene. By designing the insulating layer 8, the insulation performance of the cable can be further improved. A second fireproof layer 9 is arranged on the outside of the insulating layer 8. The second fireproof layer 9 is made of flame-retardant polyolefin. By designing the second fireproof layer 9, the outer surface of the cable has good fireproof, corrosion-resistant and anti-cracking effects.

[0022] The specific implementation process of the utility model is as follows: the shielding layer 2 used is made of copper silk belt material, which can provide electromagnetic shielding effect for the cable core 1; the filling layer 3 used is made of vulcanized rubber material, which can improve the structural elasticity and insulation effect; the insulating sleeve 4 and elastic steel wire rope 5 used can improve the cable structure strength and elasticity, so that the cable has better bending and compression resistance; the elastic layer 6 used is made of ceramic silicone rubber material, which can further improve the elasticity and strength of the internal structure of the cable; the first fireproof layer 7 used is made of asbestos material, which can improve the fireproof effect of the cable; the insulating layer 8 used is made of cross-linked polyethylene material, which can further improve the insulation performance of the cable; the second fireproof layer 9 used is made of flame-retardant polyolefin material, so that the outer surface of the cable has good fireproof, corrosion-resistant and anti-cracking effects. Through the action of the elastic steel wire rope 5, the strength of the cable structure can be improved. At the same time, with the action of the insulating sleeve 4, the elasticity of the internal structure of the cable can be improved, so that the bending and compression resistance of the cable can be better. Through the action of the elastic layer 6, the elasticity of the cable structure can be further improved, and the bending and compression resistance can be further improved. Through the action of the filling layer 3, the internal cable core 1 can be insulated and protected. At the same time, with the action of the insulating layer 8, the insulation effect of the cable can be further improved, and the safety of cable use can be improved. Through the action of the first fireproof layer 7 and the second fireproof layer 9, the cable has a better fireproof and flame-retardant effect. At the same time, the second fireproof layer 9 is made of flame-retardant polyolefin material and has a good corrosion resistance and anti-cracking effect.

[0023] Although the 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 insulated fire-resistant cable, comprising a plurality of cable cores (1), characterized in that: A shielding layer (2) is arranged on the outer side of the cable core (1), the shielding layer (2) is made of a copper wire rope, a filling layer (3) is arranged on the outer side of the shielding layer (2), an insulating sleeve (4) is arranged in the middle of the filling layer (3), an elastic steel wire rope (5) is arranged inside the insulating sleeve (4), an elastic layer (6) is arranged on the outer side of the filling layer (3), a first fireproof layer (7) is arranged on the outer side of the elastic layer (6), an insulating layer (8) is arranged on the outer side of the first fireproof layer (7), and a second fireproof layer (9) is arranged on the outer side of the insulating layer (8).

2. A double-layer insulated fire-resistant cable according to claim 1, characterized in that: The filling layer (3) is made of vulcanized rubber.

3. A double-layer insulated fire-resistant cable according to claim 1, characterized in that: The elastic layer (6) is made of ceramic silicone rubber.

4. A double-layer insulated fire-resistant cable according to claim 1, characterized in that: The first fireproof layer (7) is made of asbestos.

5. A double-layer insulated fire-resistant cable according to claim 1, characterized in that: The insulating layer (8) is made of cross-linked polyethylene.

6. A double-layer insulated fire-resistant cable according to claim 1, characterized in that: The second fireproof layer (9) is made of flame-retardant polyolefin material.

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