Fireproof cable structure

Abstract

The utility model discloses a fireproof cable structure, relates to the technical field of fireproof cables, and aims to solve the technical problems that flame protection is mainly completed through an externally arranged copper sheath of a current mineral fireproof cable, but the copper sheath is easy to reduce the flexibility of the cable, the field construction operation is inconvenient, and the construction difficulty is large. Comprising an insulation structure, a plurality of cable core bodies are distributed in the insulation structure, the insulation structure is sleeved with a flame-retardant assembly, the surface of the flame-retardant assembly is provided with an outer protection layer, the flame-retardant assembly comprises an inner fireproof layer and an outer fireproof layer arranged in the outer protection layer, and a plurality of supporting ribs are arranged on the outer edge face of the inner fireproof layer in an annular array mode. Double flame protection is formed through the double-spiral inner and outer fireproof structures, due to the fact that the spiral directions are opposite, the flame isolation effect is greatly improved, flexibility is guaranteed, the fireproof performance is high, meanwhile, on-site construction operation is facilitated, and construction difficulty is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof cables, and more specifically, to a structure of a fireproof cable. Background Art

[0002] At present, mineral fireproof cables are composed of cable conductors, insulating layers, isolation layers, and outer sheaths. Since mineral cables are all composed of inorganic substances, they will not cause fires themselves, cannot burn or support combustion, and will not produce toxic gases. Even if there is an external fire, the cable can still work normally. After the fire is cleared, the cable does not need to be replaced, which is a real fireproof cable and provides a foolproof guarantee for fire-fighting lines.

[0003] However, the mineral fireproof cables in the prior art mainly complete the protection against fire through the copper sheaths arranged outside, but the copper sheaths are likely to reduce the flexibility of the cables, are not convenient for on-site construction operations, and have a relatively large construction difficulty. In view of this, we propose a structure of a fireproof cable. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, meet the actual needs, and provide a structure of a fireproof cable to solve the technical problems that the current mineral fireproof cables mainly complete the protection against fire through the copper sheaths arranged outside, but the copper sheaths are likely to reduce the flexibility of the cables, are not convenient for on-site construction operations, and have a relatively large construction difficulty.

[0005] To solve the above technical problems, the utility model provides the following technical solution: a structure of a fireproof cable, including an insulating structure;

[0006] A number of wire core bodies are distributed in the insulating structure, and a flame retardant component is sleeved on the insulating structure, and an outer protective layer is arranged on the surface of the flame retardant component;

[0007] The flame retardant component includes an inner fireproof layer and an outer fireproof layer arranged in the outer protective layer. A number of support ribs are arranged in a circular array on the outer edge surface of the inner fireproof layer, and the other ends of the support ribs are fixedly connected to the inner wall of the outer fireproof layer;

[0008] A number of clockwise spiral grooves are arranged in a circular array on the inner edge surface of the inner fireproof layer, and inner spiral copper sheets are arranged in a number of the clockwise spiral grooves. A number of counterclockwise spiral grooves are arranged in a circular array on the outer edge surface of the outer fireproof layer, and outer spiral copper sheets are arranged in a number of the counterclockwise spiral grooves. Through grooves are opened in both the outer spiral copper sheets and the inner spiral copper sheets, and fireproof fillers are filled in the through grooves.

[0009] The utility model provides fire protection for a plurality of wire core bodies by placing a flame retardant component between an outer protective layer and an insulating structure. When flame acts on the cable surface, double flame protection is formed by a plurality of outer spiral copper sheets cooperating with an outer fireproof layer and a plurality of inner spiral copper sheets cooperating with an inner fireproof layer. The spiral directions of the plurality of outer spiral copper sheets are opposite to those of the plurality of inner spiral copper sheets, which greatly improves the flame isolation effect and ensures flexibility. It has strong fireproof performance and is convenient for on-site construction operations, greatly reducing the construction difficulty.

[0010] Preferably, the insulating structure comprises a plurality of wire core sheaths, the wire core body is inserted into the wire core sheaths, and a magnesium oxide filler layer is filled between the wire core sheaths, the inner fireproof layer and the plurality of inner spiral copper sheets.

[0011] Preferably, the inner fireproof layer and the outer fireproof layer cooperate with a plurality of the supporting ribs to form a plurality of heat-insulating cavities distributed in an annular shape, and arc-shaped heat-insulating sheets are arranged in the plurality of the heat-insulating cavities.

[0012] Preferably, one end of the arc-shaped heat insulation sheet is equidistantly provided with a plurality of positioning convex keys, and one side of the support rib is equidistantly provided with a plurality of positioning grooves for corresponding positioning convex keys to be inserted.

[0013] Preferably, several of the annularly distributed outer spiral copper sheets form an outer fire protection structure for fire prevention, and several of the annularly distributed inner spiral copper sheets form an inner fire protection structure for fire prevention, and several of the arc-shaped thermal insulation sheets form a thermal insulation structure with the outer fire protection structure and the inner fire protection structure.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides fire protection for several core bodies by placing flame retardant components between the outer protective layer and the insulating structure. When the flame acts on the cable surface, double flame protection is formed by several outer spiral copper sheets cooperating with the outer fireproof layer and several inner spiral copper sheets cooperating with the inner fireproof layer. The spiral directions of the several outer spiral copper sheets and the several inner spiral copper sheets are opposite, which greatly improves the flame isolation effect and ensures flexibility. It has strong fireproof performance and is convenient for on-site construction operations, greatly reducing the construction difficulty.

[0016] 2. The utility model also forms an insulation structure between an outer fireproof structure formed by a plurality of outer spiral copper sheets cooperating with the outer fireproof layer and an inner fireproof structure formed by a plurality of inner spiral copper sheets cooperating with the inner fireproof layer, thereby further improving the flame isolation effect and achieving strong fireproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 Cross-sectional schematic diagram of the present utility model;

[0019] Figure 3 Partial structural schematic diagram of the insulation structure in the present utility model;

[0020] Figure 4 Partial structural schematic diagram of the insulation structure in a disassembled state in the present utility model.

[0021] Explanation of reference numerals in the figure:

[0022] 1. Insulation structure; 101. Core sheath; 102. Magnesium oxide filler layer; 2. Core body; 3. Flame retardant component; 301. Inner fireproof layer; 302. Outer fireproof layer; 303. Support rib; 304. Outer spiral copper sheet; 305. Inner spiral copper sheet; 306. Fireproof filler; 307. Arc-shaped heat insulation sheet; 308. Positioning convex key; 309. Positioning groove; 4. Outer protective layer. Specific embodiments

[0023] As Figures 1 to 4 shown, a fireproof cable structure related to the present utility model includes an insulation structure 1;

[0024] A number of core bodies 2 are distributed in the insulation structure 1, and a flame retardant component 3 is sleeved on the insulation structure 1, and an outer protective layer 4 is arranged on the surface of the flame retardant component 3;

[0025] In an embodiment of the utility model, the flame retardant component 3 includes an inner fireproof layer 301 and an outer fireproof layer 302 arranged in the outer protective layer 4, a plurality of support ribs 303 are arranged in an annular array on the outer edge surface of the inner fireproof layer 301, and the other end of the support rib 303 is fixedly connected to the inner wall of the outer fireproof layer 302, a plurality of clockwise spiral grooves are opened in an annular array on the inner edge surface of the inner fireproof layer 301, and inner spiral copper sheets 305 are arranged in the plurality of clockwise spiral grooves, a plurality of counterclockwise spiral grooves are opened in the outer edge surface of the outer fireproof layer 302, and outer spiral copper sheets 304 are arranged in the plurality of counterclockwise spiral grooves, and the outer spiral copper sheets 304 and the inner The spiral copper sheets 305 are all provided with through grooves, and the through grooves are filled with fireproof fillers 306. The flame retardant components 3 are provided between the outer protective layer 4 and the insulating structure 1 to provide fire protection for the several core bodies 2. When the flame acts on the cable surface, double flame protection is formed by the several outer spiral copper sheets 304 cooperating with the outer fireproof layer 302 and the several inner spiral copper sheets 305 cooperating with the inner fireproof layer 301. The spiral directions of the several outer spiral copper sheets 304 and the several inner spiral copper sheets 305 are opposite, which greatly improves the flame isolation effect and ensures flexibility. It has strong fireproof performance and is convenient for on-site construction operations, greatly reducing the construction difficulty.

[0026] In an embodiment of the utility model, the insulating structure 1 includes a plurality of wire core sheaths 101, the wire core body 2 is inserted into the wire core sheath 101, and a magnesium oxide filler layer 102 is filled between the wire core sheath 101 and the inner fireproof layer 301 and the plurality of inner spiral copper sheets 305, the inner fireproof layer 301 and the outer fireproof layer 302 cooperate with a plurality of supporting ribs 303 to form a plurality of heat insulation cavities distributed in an annular shape, and arc-shaped heat insulation sheets 307 are arranged in the plurality of heat insulation cavities, one end of the arc-shaped heat insulation sheet 307 is equidistantly configured with a plurality of positioning convex keys 308, and one side of the supporting rib 303 is equidistantly provided with a plurality of positioning grooves 309 for inserting the corresponding positioning convex keys 308, Several annularly distributed outer spiral copper sheets 304 form an outer fire protection structure for fire prevention, and several annularly distributed inner spiral copper sheets 305 form an inner fire protection structure for fire prevention, and several arc-shaped heat insulation sheets 307 form a heat insulation structure between the outer fire protection structure and the inner fire protection structure. By means of several arc-shaped heat insulation sheets 307 arranged between the outer fire protection layer 302 and the inner fire protection layer 301, a heat insulation structure is formed between the outer fire protection structure formed by the several outer spiral copper sheets 304 and the outer fire protection layer 302, and the inner fire protection structure formed by the several inner spiral copper sheets 305 and the inner fire protection layer 301, the flame isolation effect is further improved, and the fire protection performance is relatively strong.

[0027] Working principle: This embodiment provides a fireproof cable structure. When in use, through the cooperation of a number of outer spiral copper sheets 304 spiraling clockwise and a number of inner spiral copper sheets 305 spiraling counterclockwise with the outer fireproof layer 302 and the inner fireproof layer 301, an isolation effect on flames is formed. The use of the outer spiral copper sheets 304 and the inner spiral copper sheets 305 with bidirectional spirals improves flexibility while ensuring the fireproof effect, facilitating construction layout. Moreover, an insulating structure is formed between the outer fireproof structure formed by the cooperation of a number of outer spiral copper sheets 304 and the outer fireproof layer 302 and the inner fireproof structure formed by the cooperation of a number of inner spiral copper sheets 305 and the inner fireproof layer 301, further improving the isolation effect on flames. Additionally, the magnesium oxide filler layer 102 disposed between the wire core body 2 and the inner fireproof layer 301 can further improve the isolation effect on flames, with relatively strong practicability.

[0028] The embodiments disclosed in this utility model are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of this utility model based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of this utility model, they are within the protection scope of this utility model.

Claims

1. A fire-resistant cable structure, characterized in that, comprising an insulating structure (1); A plurality of wire core bodies (2) are distributed in the insulating structure (1), and a flame retardant component (3) is sleeved on the insulating structure (1), and an outer protective layer (4) is provided on the surface of the flame retardant component (3); The flame retardant assembly (3) comprises an inner fireproof layer (301) and an outer fireproof layer (302) arranged inside the outer protective layer (4); a plurality of support ribs (303) are arranged in a ring array on the outer edge surface of the inner fireproof layer (301), and the other end of the support rib (303) is fixedly connected to the inner wall of the outer fireproof layer (302); The inner edge surface of the inner fireproof layer (301) is provided with a plurality of clockwise spiral grooves in a circular array, and each of the clockwise spiral grooves is provided with an inner spiral copper sheet (305); the outer edge surface of the outer fireproof layer (302) is provided with a plurality of counterclockwise spiral grooves in a circular array, and each of the counterclockwise spiral grooves is provided with an outer spiral copper sheet (304); both the outer spiral copper sheet (304) and the inner spiral copper sheet (305) are provided with through grooves, and the through grooves are filled with fireproof fillers (306).

2. The structure of a fire-resistant cable according to claim 1, characterized in that, The insulating structure (1) comprises a plurality of wire core sheaths (101), the wire core body (2) is inserted into the wire core sheaths (101), and a magnesium oxide filler layer (102) is filled between the wire core sheaths (101), the inner fireproof layer (301) and the plurality of inner spiral copper sheets (305).

3. A fireproof cable structure according to claim 1, characterized in that, The inner fireproof layer (301) and the outer fireproof layer (302) cooperate with a plurality of the supporting ribs (303) to form a plurality of heat-insulating cavities distributed in an annular shape, and arc-shaped heat-insulating sheets (307) are arranged in each of the heat-insulating cavities.

4. A fireproof cable structure according to claim 3, characterized in that, One end of the arc-shaped heat insulation sheet (307) is equidistantly provided with a plurality of positioning convex keys (308), and one side of the support rib (303) is equidistantly provided with a plurality of positioning grooves (309) for corresponding positioning convex keys (308) to be inserted.

5. The structure of a fire-resistant cable according to claim 4, characterized in that, A plurality of the annularly distributed outer spiral copper sheets (304) form an outer fire protection structure for fire protection, and a plurality of the annularly distributed inner spiral copper sheets (305) form an inner fire protection structure for fire protection, and a plurality of the arc-shaped heat insulation sheets (307) form a heat insulation structure between the outer fire protection structure and the inner fire protection structure.

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