Fireproof self-supporting multi-core control cable

Abstract

A fireproof self-supporting multi-core control cable disclosed by the present invention comprises an outer sheath, the outer sheath is made of a polyvinyl chloride material, a plurality of copper cores are arranged in the outer sheath, the plurality of copper cores are distributed in two layers from inside to outside, and the plurality of copper cores in a single layer are in an annular array. A plurality of copper cores are arranged in the outer sheath, inner supporting tensile steel wires are arranged in the centers of the plurality of copper cores, and a plurality of outer ring tensile steel wires are arranged in the outer sheath, so that under the combined action of the inner supporting tensile steel wires arranged in the centers of the plurality of copper cores and the plurality of outer ring tensile steel wires arranged in the outer sheath, the tensile strength of the cable is improved; the overall tensile strength of the cable can be effectively improved, the fireproof layer arranged on the outer layer of the copper cores can prevent spontaneous combustion of a single copper core from affecting the outside, the insulating layer arranged on the outer layer of the fireproof layer can prevent interference among the multiple copper cores, and the filler made of polystyrene foam materials is filled in gaps among the multiple copper cores, so that the overall tensile strength of the cable is improved. And a good flame-retardant effect can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a fire-resistant self-supporting multi-core control cable. Background Art

[0002] A cable is made of one or more insulated conductors wrapped in insulation and protective layers to transmit electricity or information from one place to another. It is usually a rope-like cable made of several or several groups of conductors twisted together.

[0003] However, most existing cables lack anti-tensile measures. Their inner core is usually made of an insulating layer and a protective layer directly wrapped together. When the cables are installed, they are often pulled to a straight state. Cables lacking anti-tensile measures are prone to cracks in the outer protective layer and even breakage of the inner core. For this reason, a fire-resistant self-supporting multi-core control cable is proposed. Summary of the invention

[0004] The object of the present invention is to provide a fire-resistant self-supporting multi-core control cable to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fire-resistant self-supporting multi-core control cable, comprising an outer sheath, the outer sheath is made of polyvinyl chloride, a plurality of copper cores are arranged inside the outer sheath, the plurality of copper cores are distributed in two layers from the inside to the outside, and a single-layer plurality of copper cores are arranged in a ring array, an inner supporting tensile steel wire is arranged at the center position of the plurality of copper cores, and a plurality of outer ring tensile steel wires are arranged inside the outer sheath.

[0006] As a further preferred embodiment of the present technical solution, the outer ring tensile steel wires are distributed along the axial direction of the cable and a plurality of the outer ring tensile steel wires are in a ring array.

[0007] As a further preferred embodiment of the present technical solution, the outer surface of the copper core is provided with a fireproof layer, and the outer surface of the fireproof layer is provided with an insulating layer.

[0008] As a further preferred embodiment of the present technical solution, fillers are provided in the gaps between the plurality of copper cores, and the fillers are made of polystyrene foam material.

[0009] As a further preferred embodiment of the present technical solution, the outer ring sleeves of the multiple copper cores located in the outer layer are provided with a shielding layer.

[0010] As a further preferred embodiment of the present technical solution, the shielding layer is made of tinned copper wires woven in a mesh shape.

[0011] As a further preferred embodiment of the present technical solution, a temperature insulation layer is provided between the outer sheath and the shielding layer, and the temperature insulation layer is made of silicone rubber.

[0012] The present invention provides a fire-resistant self-supporting multi-core control cable, which has the following beneficial effects: The present invention can effectively improve the overall tensile strength of the cable through the joint action of the inner supporting tensile steel wires arranged at the center positions of the multiple copper cores and the multiple outer ring tensile steel wires arranged in the outer sheath, and avoid the damage of the inner core of the cable during pulling. The fireproof layer arranged on the outer layer of the copper core can avoid the spontaneous combustion of a single copper core and affect the outside world. The insulating layer arranged on the outer layer of the fireproof layer can avoid interference between the multiple copper cores. The filler made of polystyrene foam material is filled in the gaps between the multiple copper cores, which can have a good flame retardant effect. The shielding layer formed by tinned copper wire in a mesh shape can effectively isolate the outside world from interfering with the internal signal transmission of the cable, and the thermal insulation layer can isolate the high temperature outside the cable to avoid the damage of the inner core of the cable caused by the external high temperature. The outermost outer sheath can have the effects of buffering, shock absorption, wear prevention and flame retardancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an internal schematic diagram of the overall structure of the present invention; Figure 3 It is a front view of the present invention; Figure 4 It is a schematic diagram of the structure of the copper core in the present invention; In the figure: 1. Outer sheath; 2. Copper core; 3. Inner supporting tensile steel wire; 4. Shielding layer; 5. Thermal insulation layer; 6. Outer ring tensile steel wire; 7. Filling; 8. Fireproof layer; 9. Insulation layer. DETAILED DESCRIPTION

[0014] 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.

[0015] The present invention provides a technical solution: Figures 1 to 4 As shown, in the present embodiment, a fire-resistant self-supporting multi-core control cable comprises an outer sheath 1. The outer sheath 1 is made of polyvinyl chloride material, which has poor combustion performance and can prevent external open flames from damaging the cable. At the same time, it has certain buffering, shock absorption and anti-wear effects. A plurality of copper cores 2 are arranged inside the outer sheath 1. The plurality of copper cores 2 are distributed in two layers from the inside to the outside, and the single-layer plurality of copper cores 2 are all in a ring array. An inner supporting tensile steel wire 3 is arranged at the center position of the plurality of copper cores 2. A plurality of outer ring tensile steel wires 6 are arranged inside the outer sheath 1. The outer ring tensile steel wires 6 are distributed along the axial direction of the cable and are in a ring array.

[0016] The outer surface of the copper core 2 is provided with a fireproof layer 8 , and the outer surface of the fireproof layer 8 is provided with an insulating layer 9 .

[0017] The fireproof layer 8 can prevent the spontaneous combustion of a single copper core 2 from affecting the outside world, and the insulating layer 9 can prevent interference between multiple copper cores 2.

[0018] Among them, fillers 7 are arranged in the gaps between the multiple copper cores 2. The fillers 7 are made of polystyrene foam material and are filled in the gaps between the multiple copper cores 2 to achieve a good flame retardant effect.

[0019] Among them, the outer ring sleeve of the multiple copper cores 2 located in the outer layer is provided with a shielding layer 4, and the shielding layer 4 is made of tinned copper wire in a mesh shape, which can effectively isolate the external interference to the internal signal transmission of the cable. Under the joint action of the shielding layer 4 and the inner supporting tensile steel wire 3, the distribution of the multiple copper cores 2 can be locked and positioned.

[0020] Among them, a thermal insulation layer 5 is arranged between the outer sheath 1 and the shielding layer 4, and the thermal insulation layer 5 is made of silicone rubber. The thermal insulation layer 5 can isolate the high temperature outside the cable and prevent the high temperature outside from damaging the inner core of the cable.

[0021] The present invention provides a fire-resistant self-supporting multi-core control cable, and the specific working principle is as follows: Through the joint action of the inner supporting tensile steel wire 3 arranged at the center position of the multiple copper cores 2 and the multiple outer ring tensile steel wires 6 arranged in the outer sheath 1, the overall tensile strength of the cable can be effectively improved to prevent the inner core of the cable from being damaged during pulling. The fireproof layer 8 arranged on the outer layer of the copper core 2 can prevent the spontaneous combustion of a single copper core 2 from affecting the outside world. The insulating layer 9 arranged on the outer layer of the fireproof layer 8 can prevent interference between the multiple copper cores 2. The filler 7 made of polystyrene foam material is filled in the gaps between the multiple copper cores 2, which can have a good flame retardant effect. The shielding layer 4 made of tinned copper wire in a mesh shape can effectively isolate the outside world from interfering with the internal signal transmission of the cable, and the thermal insulation layer 5 can isolate the high temperature outside the cable to prevent the external high temperature from damaging the inner core of the cable. The outermost outer sheath 1 can have the effects of buffering, shock absorption, wear resistance and flame retardancy.

[0022] 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 fire-resistant self-supporting multi-core control cable, comprising an outer sheath (1), characterized in that: The outer sheath (1) is made of polyvinyl chloride, and a plurality of copper cores (2) are arranged inside the outer sheath (1). The plurality of copper cores (2) are distributed in two layers from the inside to the outside, and the single-layer plurality of copper cores (2) are all arranged in a ring array. An inner supporting tensile steel wire (3) is arranged at the center of the plurality of copper cores (2), and a plurality of outer ring tensile steel wires (6) are arranged inside the outer sheath (1).

2. A fire-resistant self-supporting multi-core control cable according to claim 1, characterized in that: The outer ring tensile steel wires (6) are distributed along the axial direction of the cable, and a plurality of the outer ring tensile steel wires (6) form a ring array.

3. A fire-resistant self-supporting multi-core control cable according to claim 1, characterized in that: The outer surface of the copper core (2) is provided with a fireproof layer (8), and the outer surface of the fireproof layer (8) is provided with an insulating layer (9).

4. A fire-resistant self-supporting multi-core control cable according to claim 1, characterized in that: Fillers (7) are provided at gaps between the plurality of copper cores (2), and the fillers (7) are made of polystyrene foam material.

5. The fire-resistant self-supporting multi-core control cable according to claim 1, characterized in that: The outer ring sleeves of the plurality of copper cores (2) located in the outer layer are provided with a shielding layer (4).

6. A fire-resistant self-supporting multi-core control cable according to claim 5, characterized in that: The shielding layer (4) is made of tinned copper wires woven in a mesh shape.

7. A fire-resistant self-supporting multi-core control cable according to claim 5, characterized in that: A thermal insulation layer (5) is provided between the outer sheath (1) and the shielding layer (4), and the thermal insulation layer (5) is made of silicone rubber.

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