CN202487255U - Ceramic silicone rubber insulated metal sheath flame retardant fire-resistant cable - Google Patents

Abstract

The utility model relates to a ceramic silicon rubber insulation metallic sheath flame retardant fire resisting cable. The fire resisting cable comprises at least one conductor, a fire resisting insulating layer, a packing layer, a cabling taped covering layer and a metallic sheath respectively from inside to outside, wherein the conductor is coated by the fire resisting insulating layer, the exteriors of the conductor and the fire resisting insulating layer are coated by the cabling taped covering layer, a gap portion between the fire resisting insulating layer and the cabling taped covering layer is the packing layer, and the cabling taped covering layer is coated by the metallic sheath. The fire resisting insulating layer is made of a ceramic silicon rubber fire resisting insulating material, and the metallic sheath is manufactured by a copper-coated copper alloy belt which is subjected to a longitudinal covering, a weld joint and an embossing. The fire resisting cable has the advantages of being good in flame retarding, heat resisting, fire resisting and mechanical protection performances and simple in product manufacturing process.

Description

Ceramic silicone rubber insulated metal sheath flame retardant fire-resistant cable

technical field

The utility model relates to a flame-retardant and fire-resistant cable, in particular to a flame-retardant and fire-resistant cable with ceramic silicon rubber insulated metal sheath.

Background technique

According to the statistics of the fire protection system, most of the fire accidents are caused by the failure of electrical equipment, and the fires caused by cable aging and overload use account for a considerable proportion. In addition, the toxic gas emitted by the cable fire increases. It reduces the casualties of personnel, and it is also not conducive to the conduct of fire protection.

At present, there are mainly two types of fire-resistant cables used at home and abroad: one is mineral insulated fire-resistant cables, and the other is fire-resistant tape/organic composite insulated fire-resistant cables. The former has short production length, troublesome product joint processing, and high manufacturing costs; The refractory belt used is made of inorganic matter through a binder. During the wrapping process, it is easy to cause the inorganic matter to fall off, and there is a certain degree of instability. The quality of the product cannot be guaranteed during mass production. For silicone rubber insulated and sheathed fire-resistant cables, although they have certain fire-resistant properties, they will produce smoke and toxic gases when they are burned in a fire, which will bring unfavorable factors to the evacuation of personnel and the implementation of fire protection.

Therefore, it is necessary to design a flame-retardant and fire-resistant cable to solve the above problems.

Utility model content

The purpose of the utility model is to provide a ceramic silicon rubber insulated metal sheath flame-retardant and fire-resistant cable with simple production process, low cost, and good flame retardancy, high temperature resistance, fire resistance and mechanical protection performance, so as to ensure that the cable circuit In the event of a fire, it can operate normally for a certain period of time without releasing smoke and poisonous gas, ensuring the safe evacuation of personnel and the smooth progress of fire fighting.

In order to achieve the above object, the utility model takes the following technical solutions:

Ceramic silicone rubber insulated metal sheath flame retardant and fire-resistant cable, including conductor, fire-resistant insulation layer covering the conductor, cabled wrapping layer covered by the fire-resistant insulating layer, and between the fire-resistant insulating layer and the cabled wrapping layer The filling layer between them, and the metal sheath covering the outer cladding of the cable.

The further improvement of the utility model is that: the conductor is a copper conductor.

The further improvement of the utility model is that: the fire-resistant insulating layer is made of ceramic silicon rubber, and the thickness of the fire-resistant insulating layer is 0.6-2.2mm.

The further improvement of the utility model is that: the filling layer is a rock wool filling rope.

The further improvement of the utility model is that: the cabled wrapping layer is composed of synthetic mica tape.

The further improvement of the utility model is that: the metal sheath is made of a copper-clad copper alloy strip formed longitudinally and then welded and embossed, and the thickness of the copper-clad copper alloy strip is 0.1-0.3 mm.

The further improvement of the utility model is that: the flame-retardant and fire-resistant cable includes several conductors, each conductor is covered with a fire-resistant insulating layer; the diameters of the several conductors are the same.

Structural features of the utility model: the conductor adopts single or multi-strand copper wire, the refractory insulating layer adopts ceramic silicon rubber, the cable wrapping layer adopts synthetic mica tape, the filling layer adopts rock wool filling rope, and the metal sheath adopts copper clad Copper alloy strip. The metal sheath is welded and corrugated after longitudinal wrapping.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The fire-resistant insulating layer in the utility model is made of ceramic silicon rubber, which has the same flexibility and elasticity as ordinary rubber at room temperature, and can form a ceramic shell with certain mechanical strength after high temperature or flame burning , can withstand high temperature of 1200 ℃, and has good electrical insulation performance, so that the normal operation of the cable circuit is effectively guaranteed.

2. The synthetic mica tape used in this utility model has good heat insulation and fire resistance, and can withstand high temperatures of 1000°C; the rock wool-filled rope between the fire-resistant insulating layer and the cabled wrapping layer also has good heat insulation And fire-resistant performance, to ensure the safe use of insulated single wire inside the cable core.

3. The copper-clad copper alloy strip used in the utility model has a high melting point (1000°C), light weight, low cost, good processing performance, and has mechanical and physical properties comparable to pure copper strips, which can effectively prevent Combustibility, fire resistance, high temperature resistance.

4. The metal sheath in the utility model is made of longitudinal, cladding welding and embossing, which ensures good bending performance of the cable and has good mechanical protection performance at the same time.

5. The raw materials used in this utility model are all smoke-free, halogen-free, and non-toxic materials, and will not produce smoke and toxic gases when burned by high temperature or flames, and belong to environmentally friendly flame-retardant and fire-resistant cables.

Description of drawings

Fig. 1 is the external appearance diagram of ceramic silicon rubber insulated metal sheath fire-resistant cable conforming to the utility model;

Fig. 2 is the structural representation of the utility model embodiment 1;

Fig. 3 is a schematic structural view of Embodiment 2 of the utility model.

Labels in the figure: 1 conductor, 2 refractory insulating layer, 3 filling layer, 4 cabled wrapping layer, 5 metal sheath.

Detailed ways

Below in conjunction with accompanying drawing 1 to 3 the utility model is further described.

Example 1:

As shown in Figure 2, a ceramic silicone rubber insulated metal sheath flame-retardant fire-resistant cable, the cable includes a conductor 1, a fire-resistant insulating layer 2, a filling layer 3, a cabled wrapping layer 4 and a metal sheath from the inside to the outside. Set 5; wherein there are three conductors 1, and each of them has the same diameter. The refractory insulating layer 2 is coated on the outside of the conductor 1, and the cabled wrapping layer 4 covers the conductor 1 and the refractory insulating layer 2; the gap between the cabled wrapping layer 4 and the refractory insulating layer 2 is the filling layer 3; the metal The sheath 5 covers the outside of the cabled wrapping 4 . The refractory insulating layer 2 is made of ceramic silicon rubber material, which can withstand high temperature of 1200°C and has good electrical insulation performance. It can form a ceramic shell with certain mechanical strength after high temperature or flame burning.

The cable wrapping layer 4 is made of synthetic mica tape, with an overlapping rate of 50%; the filling layer 3 is made of rock wool filling rope, which effectively protects the insulating single wire and ensures the roundness of the cable core; Both synthetic mica tape and rock wool-filled rope have excellent thermal insulation and fire resistance properties.

The metal sheath 5 is made of copper-clad copper alloy strip material, which has a high melting point (1000° C.) and is light in weight. The metal sheath 5 is made of longitudinal cladding, welding seam and embossing, which has good mechanical protection performance and bending performance, and also has excellent flame retardancy, high temperature resistance and fire resistance performance, and can effectively guarantee Cable circuits operate normally for a certain amount of time.

Example 2:

As shown in Figure 3, a ceramic silicone rubber insulated metal sheath flame-retardant fire-resistant cable, the cable includes a conductor 1, a fire-resistant insulating layer 2, a filling layer 3, a cabled wrapping layer 4 and a metal sheath from the inside to the outside. Set of 5; wherein the conductor 1 has 4 wires, all of which are copper stranded wires, and each wire has the same diameter. The refractory insulating layer 2 is coated on the outside of the conductor 1, and the cabled wrapping layer 4 covers the conductor 1 and the refractory insulating layer 2; the gap between the cabled wrapping layer 4 and the refractory insulating layer 2 is the filling layer 3; the metal The sheath 5 covers the outside of the cabled wrapping 4 . The refractory insulation layer 2 is made of ceramic silicon rubber material, which can withstand high temperature of 1200°C and has good electrical insulation performance. It can form a ceramic shell with certain mechanical strength after high temperature or flame burning.

The cable wrapping layer 4 is made of synthetic mica tape, with an overlapping rate of 50%; the filling layer 3 is made of rock wool filling rope, which effectively protects the insulating single wire and ensures the roundness of the cable core; Both synthetic mica tape and rock wool-filled rope have excellent thermal insulation and fire resistance properties.

The metal sheath 5 is made of copper-clad copper alloy strip material, which has a high melting point (1000° C.) and is light in weight. The metal sheath 5 is made of longitudinal cladding, welding seam and embossing, which has good mechanical protection performance and bending performance, and also has excellent flame retardancy, high temperature resistance and fire resistance performance, and can effectively guarantee Cable circuits operate normally for a certain amount of time.

The above specific embodiments are only used to illustrate the utility model, rather than to limit the utility model.

Claims (7)

1. potteryization silicon rubber insulation metallic sheath flame resistant cable; It is characterized in that: comprise conductor (1), be coated on the outer refractory insulating layer (2) of conductor (1), be coated on the packed layer (3) between refractory insulating layer (2) outer stranding lapping layer (4), refractory insulating layer (2) and the stranding lapping layer (4), and be coated on the outer metallic sheath (5) of stranding lapping layer (4).

2. potteryization silicon rubber insulation metallic sheath flame resistant cable as claimed in claim 1 is characterized in that: said conductor (1) is a copper conductor.

3. potteryization silicon rubber insulation metallic sheath flame resistant cable as claimed in claim 1, it is characterized in that: said refractory insulating layer (2) is processed by pottery silicon rubber, and the thickness of said refractory insulating layer is 0.6～2.2mm.

4. potteryization silicon rubber insulation metallic sheath flame resistant cable as claimed in claim 1 is characterized in that: said packed layer (3) is the rock wool gasket for packing.

5. potteryization silicon rubber insulation metallic sheath flame resistant cable as claimed in claim 1, it is characterized in that: said stranding lapping layer (4) is made up of synthetic mica tape.

6. potteryization silicon rubber insulation metallic sheath flame resistant cable as claimed in claim 1 is characterized in that: said metallic sheath (5) by the vertical wrap molding of copper-clad copper alloy belt after weld seam and embossing process, the thickness of said copper-clad copper alloy belt is 0.1～0.3mm.

7. like each described potteryization silicon rubber insulation metallic sheath flame resistant cable in the claim 1 to 6, it is characterized in that: said flame resistant cable comprises plurality of conductors (1), and each conductor (1) periphery all is coated with refractory insulating layer (2); Said plurality of conductors (1) diameter is identical.

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