CN212209001U - Cascade water cooling type B1 medium voltage aluminum alloy fireproof cable - Google Patents

Abstract

The utility model discloses a B1-level medium-voltage aluminum alloy fireproof cable of stepped water release and cooling type, which comprises a cable core. , The conductor shielding layer, the insulating layer, the insulating shielding layer, and the metal shielding tape are composed of the first refractory oxygen barrier layer extruded as a whole outside the cable core, and the gap between the first refractory oxygen barrier layer and the wire core is filled with low smoke Halogen-free flame retardant filler; outside the first refractory and oxygen barrier layer, there are cooling and fireproof layer, first fire-resistant and heat-insulating layer, second fire-resistant and oxygen-insulating layer, cooling and heat-insulating armored fire-blocking layer, cooling and fire-insulating layer, and second fire-resistant layer. Insulation layer, fire-resistant outer sheath. The cable of the utility model has the characteristics of flame retardant, flame retardant and fire resistance.

Description

Cascade water cooling type B1 medium voltage aluminum alloy fireproof cable

technical field

The utility model relates to the field of electric power transmission cables, in particular to a B1-level medium-voltage aluminum alloy fireproof cable of a stepped water release and cooling type.

Background technique

With the rapid development of urbanization in my country and the high progress of construction technology, various large-scale buildings, such as large airports, large railway stations, large gymnasiums, large theaters, large exhibition halls, large office buildings, etc., have become symbols of urban modernization. sex symbol. With the continuous increase of the volume ratio, electrical equipment and power consumption of large buildings, 1kV low-voltage power cables can no longer fully meet the transmission needs of power consumption, so 10kV or 35kV medium-voltage power cables need to be used inside buildings to achieve high power. Transmission of electrical energy. Since power cables need to pass through buildings and relatively densely populated areas, in order to avoid power accidents from causing fires, or to prevent power cables from causing secondary accidents in the event of fire damage, power cables are required to have reliable fire protection. Function. However, due to the high voltage level and special core structure of 10kV or 35kV medium voltage aluminum alloy fireproof cables, there are many difficulties in realizing fireproof function.

Utility model content

The purpose of the utility model is to provide a B1-level medium-voltage aluminum alloy fireproof cable of stepped water release and cooling type, so as to solve the problem of difficulty in realizing the fireproof function of the prior art 10kV or 35kV medium-voltage aluminum alloy fireproof cable.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is:

The cascade water cooling type B1 medium-voltage aluminum alloy fireproof cable is characterized in that: it includes a cable core, and the cable core is composed of a single wire core, or the cable core is formed by twisting three wire cores, and each wire core is made of aluminum alloy. Alloy special-shaped conductor, conductor shielding layer wrapped on aluminum alloy special-shaped conductor, insulating layer wrapped on conductor shielding layer, insulating shielding layer wrapped on insulating layer, insulating shielding layer wrapped with metal shielding tape ; The metal shielding tape of the cable core composed of a single wire core is extruded with a first fire-resistant oxygen barrier layer, or the cable core composed of three wire cores is extruded with a first fire-resistant oxygen barrier layer, and the first fire-resistant oxygen barrier layer is extruded as a whole. The gap between the oxygen barrier layer and the wire core is filled with low-smoke halogen-free flame retardant filler; A refractory thermal insulation layer is extruded and covered with a second refractory oxygen barrier layer, the second refractory oxygen barrier layer is surrounded by a cooling and thermal insulation armored fire barrier, and the cooling and thermal insulation armored fire barrier is extruded and covered with a cooling fire barrier , the cooling and fire-insulating layer is wrapped with a second refractory and heat-insulating layer, and the second refractory and heat-insulating layer is extruded and wrapped with a fire-resistant outer protective layer.

The step-release water cooling type B1-level medium-voltage aluminum alloy fireproof cable is characterized in that: the aluminum alloy special-shaped conductor is twisted by a plurality of special-shaped aluminum alloy monofilaments.

The stepwise water release and cooling type B1-level medium-voltage aluminum alloy fireproof cable is characterized in that: the cooling and fireproof layer is made of inorganic compound materials with water release and cooling properties, and the critical temperature range of decomposition and water cooling is 150°C to 100°C 250°C, preferably 200°C.

The cascade water cooling type B1-level medium-voltage aluminum alloy fireproof cable is characterized in that: the cooling and heat-insulating armored fire-blocking layer is armored with metal tapes, and the armoring type is a metal tape interlocking armoring structure.

The step water release cooling type B1 medium-voltage aluminum alloy fireproof cable is characterized in that: the cooling and fire insulation layer is made of inorganic compound materials with water release cooling properties, and the critical temperature range for decomposing water cooling is 300°C to 400°C, preferably 350°C.

The described cascade water cooling type B1-level medium-voltage aluminum alloy fireproof cable is characterized in that: the fire-resistant outer sheath is made of low-smoke halogen-free flame-retardant polyolefin material, preferably B1-level with high flame retardancy and burning into a shell Special sheath material.

Compared with the prior art, the utility model has the following advantages:

The utility model provides a B1-level medium-voltage aluminum alloy fireproof cable of stepped water release and cooling type. The cable has the characteristics of flame retardant and flame retardant, and will not generate combustion support for the surrounding environment; the cable has the characteristics of fire resistance, even if it is completely exposed to fire conditions , it will not cause instantaneous power failure, affecting escape and rescue; the cable has the characteristics of low smoke, low toxicity, low corrosion, low heat release, no dripping, etc., and will not cause secondary damage to the surrounding in case of fire.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the cascade water cooling type B1 medium-voltage aluminum alloy fireproof cable includes a cable core. The core 1 is respectively composed of an aluminum alloy special-shaped conductor 11 , a conductor shielding layer 12 wrapped around the aluminum alloy special-shaped conductor 11 , an insulating layer 13 wrapped around the conductor shielding layer 12 , and an insulating shielding layer 14 wrapped around the insulating layer 13 . The insulating shielding layer 14 is surrounded by a metal shielding tape 15 (copper shielding tape in this embodiment), and the conductor shielding layer 12, the insulating layer 13 and the insulating shielding layer 14 are co-extruded in three layers; The metal shielding tape 15 of the cable core is extruded with a first fire-resistant oxygen-insulating layer 3, or the cable core composed of three cores 1 is extruded with a first fire-resistant oxygen-insulating layer 3 as a whole, and the first fire-resistant oxygen-insulating layer 3 A low-smoke halogen-free flame retardant filler 2 is filled in the gap between the wire core 1; 5. The first refractory and thermal insulation layer 5 is extruded and wrapped with a second refractory oxygen barrier layer 6, and the second refractory oxygen barrier layer 6 is wrapped with a cooling and thermal insulation armored fire barrier layer 7, and the cooling and thermal insulation armored fire barrier layer 7 A cooling and fire-insulating layer 8 is extruded and wrapped, a second refractory insulating layer 9 is wrapped around the cooling and fire-insulating layer 8, and a fire-resistant outer protective layer 10 is extruded and wrapped around the second refractory insulating layer 9.

In the present invention, the aluminum alloy special-shaped conductor 11 is twisted by several special-shaped aluminum alloy monofilaments, and has the characteristics of high compression coefficient, smooth appearance, and roundness.

In the present invention, the cooling and fireproof layer 4 is made of inorganic compound materials with water-releasing and cooling properties, and is composed of sodium silicate, aluminum hydroxide, and a cementing agent. 200℃, with the function of cooling aluminum alloy.

In the utility model, the cooling and heat insulating armored fire-blocking layer 7 is armored with metal tapes, and the armoring type is a metal tape interlocking armoring structure, which has the functions of cooling, heat insulation and impact resistance.

In the present invention, the cooling and fire insulating layer 8 is made of inorganic compound materials with water-releasing and cooling properties, and is composed of sodium silicate, magnesium hydroxide, and a cementing agent. The temperature is preferably 350°C, and it has the function of cooling and preventing fire.

In the present invention, the fire-blocking outer sheath 10 is made of low-smoke halogen-free flame-retardant polyolefin material, preferably a B1-level special sheath material with flame-retardant and crusted properties, with fire-blocking, halogen-free, low-smoke, and low-toxicity properties. , low corrosion, low heating value and no dripping characteristics.

The utility model of the cascade water cooling type B1 level medium-voltage aluminum alloy fireproof cable is provided with a cooling fireproof layer, a cooling insulation armored fire blocking layer, and a cooling fire insulation layer structure, so that the cable forms a "cascade" cooling effect from the outside to the inside. , which solves the problem that the medium voltage cable cannot achieve the fire resistance function.

The embodiments described in the present invention are only the description of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Various modifications and improvements made by the technical solution of the utility model shall fall within the protection scope of the present utility model, and the technical content claimed by the present utility model has been fully recorded in the claims.

Claims (6)

1. Step water release cooling type B1 level middling pressure aluminum alloy fireproof cable, its characterized in that: the cable comprises a cable core, wherein the cable core consists of a single wire core or is formed by twisting three wire cores, each wire core consists of an aluminum alloy special-shaped conductor, a conductor shielding layer coated outside the aluminum alloy special-shaped conductor, an insulating layer coated outside the conductor shielding layer and an insulating shielding layer coated outside the insulating layer, and a metal shielding tape is wrapped outside the insulating shielding layer; a first fire-resistant oxygen-isolating layer is extruded outside a metal shielding belt of a cable core consisting of a single wire core, or the first fire-resistant oxygen-isolating layer is extruded outside the cable core consisting of three wire cores integrally, and a low-smoke halogen-free flame-retardant filler is filled in a gap between the first fire-resistant oxygen-isolating layer and the wire cores; the first fire-resistant oxygen-isolating layer is wrapped with a cooling fireproof layer in an extruding mode, the cooling fireproof layer is wrapped with a first fire-resistant heat-insulating layer in an outer wrapping mode, the first fire-resistant heat-insulating layer is wrapped with a second fire-resistant oxygen-isolating layer in an outer wrapping mode, the second fire-resistant oxygen-isolating layer is wrapped with a cooling heat-insulating armor fire-blocking layer in an outer wrapping mode, the cooling heat-insulating armor fire-blocking layer is wrapped with a cooling heat-insulating layer in an outer wrapping mode, and the second fire-resistant heat-insulating layer is wrapped with a second fire-resistant heat-insulating.

2. The step water release cooling type B1 level medium voltage aluminum alloy fireproof cable of claim 1, wherein: the aluminum alloy special-shaped conductor is formed by twisting a plurality of special-shaped aluminum alloy monofilaments.

3. The step water release cooling type B1 level medium voltage aluminum alloy fireproof cable of claim 1, wherein: the temperature-reducing fireproof layer is made of an inorganic compound material with water releasing and temperature-reducing characteristics.

4. The step water release cooling type B1 level medium voltage aluminum alloy fireproof cable of claim 1, wherein: the temperature-reducing heat-insulating armored fire-blocking layer is armored by a metal belt, and the armor type is a metal belt interlocking armor structure.

5. The step water release cooling type B1 level medium voltage aluminum alloy fireproof cable of claim 1, wherein: the temperature-reducing and fire-isolating layer is made of an inorganic compound material with water releasing and temperature-reducing characteristics.

6. The step water release cooling type B1 level medium voltage aluminum alloy fireproof cable of claim 1, wherein: the fire-retardant outer protective layer is made of low-smoke halogen-free flame-retardant polyolefin material.

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