CN218939291U - Medium-voltage fireproof cable - Google Patents

Abstract

The utility model relates to the technical field of cables and discloses a medium-voltage fire-resistant cable, which comprises a protective jacket, wherein three wires are arranged in the protective jacket, the protective jacket is of a multi-layer structure, an outer jacket, a first glass fiber cloth wrapping layer of a first steel wire weaving layer, a second glass fiber cloth wrapping layer of a mica wrapping layer and a ceramic silicon rubber protective layer are sequentially arranged in the protective jacket from outside to inside, the first steel wire weaving layer and the second steel wire weaving layer are formed by weaving stainless steel wires, and the first glass fiber cloth wrapping layer and the second glass fiber cloth wrapping layer are formed by wrapping glass fiber cloth. According to the medium-voltage fire-resistant cable, the protective jacket adopts the multi-layer protective structure, so that the protective strength of the medium-voltage fire-resistant cable is improved, mineral fire clay is added into the glass fiber cloth wrapping layer, the fire resistance of the glass fiber cloth wrapping layer is further improved, and the fire-resistant protection measures are effectively avoided.

Description

Medium-voltage fireproof cable

Technical Field

The utility model relates to the technical field of cables, in particular to a medium-voltage fire-resistant cable.

Background

With the gradual acceleration of the economic construction of China, medium voltage distribution systems corresponding to important public places such as high-rise buildings, subways, power plants, nuclear power plants, tunnels and the like provide higher requirements for the safety performance of cables in the event of a fire, and medium voltage refractory cables are generated;

application number: CN201110327455.0, proposes a medium-voltage fire-resistant cable, which can form a hard ceramic armor after high-temperature combustion, so that the protection circuit is smooth, the longer the ablation time is, the harder the ceramic armor is, the better the insulation performance is, and the fire resistance and pressure resistance of the cable can be completely ensured; meanwhile, the product cost is low, the installation and the laying are easy, and the use is convenient;

but the fire-retardant fire prevention effect of middling pressure fire-resistant cable mainly reaches through outer oversheath, but when the oversheath appears damaged, the position of damage can greatly reduced fire-resistant effect, and fire-resistant protection's measure is comparatively single.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model provides a medium-voltage fireproof cable.

The utility model provides a medium voltage fire-resistant cable, includes protective sheath and wire, protective sheath is including oversheath, first steel wire weaving layer, first glass fiber cloth around covering, second steel wire weaving layer, second glass fiber cloth around covering, mica around package isolation layer and ceramic silicone rubber protective layer, oversheath, first steel wire weaving layer, first glass fiber cloth around covering, second steel wire weaving layer, second glass fiber cloth around covering, mica around package isolation layer and ceramic silicone rubber protective layer from outside to inside parcel outside the wire.

Preferably, the first steel wire braiding layer and the second steel wire braiding layer are formed by braiding stainless steel wires.

Preferably, the materials of the first glass fiber cloth wrapping layer and the second glass fiber cloth wrapping layer are glass fiber cloth and mineral refractory clay.

Preferably, the outer sheath is a low smoke halogen-free flame retardant sheath.

Preferably, the wire is composed of a conductor and a shielding layer wrapped on the outer surface of the conductor.

Preferably, the shielding layer comprises a metal shielding layer, an insulating layer and a conductor shielding layer, and the metal shielding layer, the insulating layer and the conductor shielding layer are sequentially wrapped outside the conductor from outside to inside.

According to the medium-voltage fireproof cable, the strength of the protective jacket is greatly improved by adopting the steel wire braiding layer and the glass fiber cloth wrapping layer in the protective jacket, meanwhile, the outer jacket of the outermost layer of the protective jacket is made of a low-smoke halogen-free flame-retardant material, halogen acid is not released, the self-extinguishing effect is achieved, the flame-retardant effect is improved, toxic corrosive gas is not generated, mineral fire clay is added in the glass fiber cloth wrapping layer, the strength of the glass fiber cloth wrapping layer is improved, the fire resistance of the medium-voltage fireproof cable is further improved, the comprehensiveness of fire-resistant protection is achieved, and the metal shielding layer, the insulating layer and the conductor shielding layer are sequentially arranged on the outer surface of an inner conductor to protect the conductor, so that the using effect of the conductor is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a cross-sectional view of the overall structure of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The medium voltage fire-resistant cable shown in fig. 1-2 comprises a protective jacket 1 and a wire 2, wherein the protective jacket 1 comprises an outer sheath 3, a first steel wire weaving layer 4, a first glass fiber cloth wrapping layer 5, a second steel wire weaving layer 6, a second glass fiber cloth wrapping layer 7, a mica wrapping isolation layer 8 and a ceramic silicon rubber protection layer 9, and the outer sheath 3, the first steel wire weaving layer 4, the first glass fiber cloth wrapping layer 5, the second steel wire weaving layer 6, the second glass fiber cloth wrapping layer 7, the mica wrapping isolation layer 8 and the ceramic silicon rubber protection layer 9 are wrapped outside the wire 2 from outside to inside.

In this embodiment, the first steel wire braid 4 and the second steel wire braid 6 are both woven by stainless steel wires, and the toughness of the protective outer sleeve 1 is increased by weaving the stainless steel wires into the first steel wire braid 4 and the second steel wire braid 6.

As another embodiment of the utility model, the materials of the first glass fiber cloth wrapping layer 5 and the second glass fiber cloth wrapping layer 7 are glass fiber cloth and mineral refractory clay, and the mineral refractory clay is added into the glass fiber cloth wrapping layer, so that the fire resistance of the medium-voltage refractory cable is further improved.

As another embodiment of the utility model, the outer sheath 3 is a low-smoke halogen-free flame-retardant sheath, and the low-smoke halogen-free flame-retardant material does not release halogen acid, has the characteristic of self-extinguishing, and increases the flame-retardant effect.

As another embodiment of the utility model, the wire 2 is composed of a conductor 14 and a shielding layer wrapped on the outer surface of the conductor 14, the shielding layer comprises a metal shielding layer 10, an insulating shielding layer 11, an insulating layer 12 and a conductor shielding layer 13, the metal shielding layer 10, the insulating shielding layer 11, the insulating layer 12 and the conductor shielding layer 13 are sequentially wrapped outside the conductor 14 from outside to inside, and the conductor 14 is protected through the metal shielding layer 10, the insulating shielding layer 11, the insulating layer 12 and the conductor shielding layer 13, so that the use effect of the conductor 14 is improved.

According to the medium-voltage fire-resistant cable, the protective jacket adopts the multi-layer protective structure, so that the protective strength of the medium-voltage fire-resistant cable is improved, mineral fire clay is added into the glass fiber cloth wrapping layer, the fire resistance of the glass fiber cloth wrapping layer is further improved, and the fire-resistant protection measures are effectively avoided.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. The utility model provides a medium voltage fire-resistant cable, its characterized in that, including protective sheath (1) and wire (2), protective sheath (1) is including oversheath (3), first steel wire weaving layer (4), first glass fiber cloth around covering (5), second steel wire weaving layer (6), second glass fiber cloth around covering (7), mica around packet isolation layer (8) and ceramic silicone rubber protective layer (9), oversheath (3), first steel wire weaving layer (4), first glass fiber cloth around covering (5), second steel wire weaving layer (6), second glass fiber cloth around covering (7), mica around packet isolation layer (8) and ceramic silicone rubber protective layer (9) from outside to inside parcel outside wire (2).

2. A medium voltage fire resistant cable according to claim 1 characterised in that the first wire braid (4) and the second wire braid (6) are both braided from stainless steel wires.

3. A medium voltage fire resistant cable according to claim 1 characterised in that the first glass fibre cloth wrapping layer (5) and the second glass fibre cloth wrapping layer (7) are both made of glass fibre cloth mixed with mineral fire clay.

4. A medium voltage fire resistant cable according to claim 1 characterised in that the outer sheath (3) is a low smoke halogen free flame retardant sheath.

5. A medium voltage fire resistant cable according to claim 1 characterized in that the conductor (2) consists of a conductor (14) and a shielding layer wrapped around the outer surface of the conductor (14).

6. The medium voltage fire resistant cable according to claim 5, wherein the shielding layer comprises a metal shielding layer (10), an insulating shielding layer (11), an insulating layer (12) and a conductor shielding layer (13), and the metal shielding layer (10), the insulating shielding layer (11), the insulating layer (12) and the conductor shielding layer (13) are sequentially wrapped outside the conductor (14) from outside to inside.

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