CN211087946U

CN211087946U - Flexible medium-voltage fireproof cable

Info

Publication number: CN211087946U
Application number: CN201922012799.7U
Authority: CN
Inventors: 冯保磊; 曹弘皎; 肖汉杰
Original assignee: People's Cable Group Co ltd
Current assignee: People's Cable Group Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-24
Anticipated expiration: 2029-11-20

Abstract

The utility model relates to the technical field of electric wires and cables, in particular to a flexible medium-voltage fireproof cable, which comprises a conductor, a conductor shielding layer, an insulating shielding layer, a metal shielding layer, fireproof plasticine, a cable core wrapping belt, a sheath fireproof layer and an outer sheath; the cable comprises a conductor shielding layer, an insulating layer and an insulation shielding layer, wherein the conductor shielding layer, the insulating layer and the insulation shielding layer are co-extruded from inside to outside, and are longitudinally laminated on the outer wall of the conductor to form an insulation wire core with the conductor, the metal shielding layer is extruded in a split-phase mode on the outer side of the insulation shielding layer, the three-phase insulation wire core containing the metal shielding layer forms a cable core, the gap between the cable cores is filled with fireproof plasticine, a cable core wrapping belt is longitudinally wrapped on the outer side of the cable core, the sheath fire-proof layer is extruded on the outer ring of the cable core wrapping belt, and. The cable has good electrical property, insulating property, fireproof property, flexibility, environmental protection and other properties, and is widely applied to electric energy transmission in power transmission and distribution lines with rated voltage of 35kV or below.

Description

Flexible medium-voltage fireproof cable

Technical Field

The utility model relates to a wire and cable technical field, concretely relates to flexible middling pressure fireproof cable.

Background

At present, various trades equipment is various, population intensity is great, the safety of using electricity to prevent fires becomes the civil engineering of government, reportedly, there are thousands of fire accidents each year and cause the casualties, the electric wire and cable is the chief culprit that causes personnel on fire, cause the circuit short circuit when the electric wire and cable conflagration breaks out, can not give sufficient time in limited time and flee for death, especially to the more intensive market of population, gymnasium, resident residential area etc. consequently, research fireproof cable becomes the big things such as reducing casualties and loss of property.

Disclosure of Invention

In order to solve the problem that exists among the prior art, the utility model provides a flexible middling pressure fireproof cable, this cable have performances such as good electrical property, insulating properties, fire behavior, compliance, environmental protection, long service life, wide application is in the transport of electric energy in the transmission and distribution lines of rated voltage 35kV and below.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a flexible medium-voltage fireproof cable, which comprises a conductor, a conductor shielding layer, an insulating shielding layer, a metal shielding layer, fireproof plasticine, a cable core wrapping belt, a sheath fireproof layer and an outer sheath; the cable comprises a conductor shielding layer, an insulating layer and an insulation shielding layer, wherein the conductor shielding layer, the insulating layer and the insulation shielding layer are co-extruded from inside to outside, and are longitudinally laminated on the outer wall of the conductor to form an insulation wire core with the conductor, the metal shielding layer is extruded in a split-phase mode on the outer side of the insulation shielding layer, the three-phase insulation wire core containing the metal shielding layer forms a cable core, the gap between the cable cores is filled with fireproof plasticine, a cable core wrapping belt is longitudinally wrapped on the outer side of the cable core, the sheath fire-proof layer is extruded on the outer ring of the cable core wrapping belt, and.

Preferably, the conductor is a compacted and stranded round copper or aluminum conductor.

Preferably, the conductor shielding layer and the insulation shielding layer are made of semiconductive shielding materials.

Preferably, the insulating layer is made of a chemically cross-linked polyethylene insulating material.

Preferably, the metal shielding layer is a copper-extruded sheath.

Preferably, the cable core wrapping tape is a glass fiber tape.

Preferably, the sheath fire-proof layer adopts an interlocking armored corrugated copper sheath.

Preferably, the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin material.

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

the utility model discloses a flexible medium voltage fireproof cable, the cable core clearance is filled with fireproof plasticine, when a fire disaster happens, the fireproof plasticine is formed into a hard block shape, and the burning of flame is prevented; the metal shielding changes the traditional wrapped metal copper strip, the extruded copper sheath is used as a metal shielding layer, the metal shielding layer is continuous, compact and seamless, and flame can not enter the insulating wire core when a fire disaster happens, so that the insulating wire core is burnt; the fire-proof layer of the sheath adopts a chain armored corrugated copper sheath, the melting point of the copper sheath is 1083 ℃, the flame temperature is generally 850-900 ℃, and when a fire disaster happens, the metal sheath protects the cable core from being burnt, so that the circuit can continuously and normally run. The utility model has the advantages of simple structure and novel design, the wide application is particularly useful for places such as market, gymnasium, resident's residential building, library that the population is intensive in the transport of electric energy among the transmission and distribution lines of rated voltage 35kV and below, and the life of cable reaches more than 30 years.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a flexible medium-voltage fireproof cable according to an embodiment of the present invention.

The reference numbers in the figures denote: 1. the cable comprises a conductor, 2 a conductor shielding layer, 3 an insulating layer, 4 an insulating shielding layer, 5 a metal shielding layer, 6 a fireproof plasticine, 7 a cable core wrapping tape, 8 a sheath fireproof layer and 9 an outer sheath.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.

As shown in fig. 1, the flexible medium-voltage fireproof cable of the embodiment includes a conductor 1, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4, a metal shielding layer 5, a fireproof plasticine 6, a cable core wrapping tape 7, a sheath fireproof layer 8 and an outer sheath 9; conductor shielding layer 2, insulating layer 3 and insulation shielding layer 4 are crowded altogether by interior to outer three-layer to vertically the laminating sets up on the outer wall of conductor 1, constitute insulating core with conductor 1, insulating shielding layer 4's the outside split phase crowded package metal shielding layer 5, the three-phase contains the insulating core constitution cable core of metal shielding layer 5, cable core clearance packing has fire prevention plasticine 6, the outside of cable core is vertically around having

cable core band

7, 8 extrusion in the outer lane of cable core band 7 of sheath flame retardant coating, 8 outside crowded packages of sheath flame retardant coating have oversheath 9.

Preferably, the conductor 1 is made of pressed and twisted round copper or aluminum conductor, and the surface of the conductor 1 is smooth and burr-free.

The conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are formed by three-layer co-extruded catenary chemical crosslinking lines at one time, the conductor shielding layer 2 and the insulating shielding layer 4 are made of semi-conductive shielding materials, the insulating layer 3 is an insulating extrusion layer made of chemical crosslinking polyethylene insulating materials, and the surface of the insulating extrusion layer is smooth and free of sizing materials.

The metal shielding layer 5 is formed by adopting an extruded copper sheath, the extruded copper sheath is continuous, compact and seamless, and flame can not enter the insulating wire core when a fire disaster happens, so that the insulating wire core is burnt.

The cable core wrapping tape 7 is wrapped by a non-hygroscopic glass fiber tape, and the wrapping should have no wrinkles or leakage.

The sheath fire-proof layer 8 adopts a chain armored corrugated copper sheath, the melting point of the copper sheath is 1083 ℃, the flame temperature is generally 850-900 ℃, and when a fire disaster happens, the metal sheath protects the cable core from being burnt, so that the circuit can continuously and normally operate. The chain armor pitch and the wave crests and the wave troughs are uniform, and flexibility is achieved.

The outer sheath 9 is made of low-smoke halogen-free flame-retardant polyolefin material, the surface of the outer sheath is smooth, and the oxygen index is not less than 36.

And the gap of the cable core is filled with fireproof plasticine 6, and when a fire disaster occurs, the fireproof plasticine 6 is sintered into a hard block shape to prevent flame from burning.

The utility model discloses a flexible middling pressure fireproof cable, the structure is provided with fire prevention plasticine 6, crowded package copper sheath and chain armor wrinkle line copper sheath, through the three-layer flame retardant coating, has effectively avoided the incident that the cable burning caused, and fire behavior is better, has better application prospect and use value.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Finally, it is to be noted that: the above description is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims

1. A flexible medium-voltage fireproof cable is characterized by comprising a conductor, a conductor shielding layer, an insulating shielding layer, a metal shielding layer, fireproof plasticine, a cable core wrapping belt, a sheath fireproof layer and an outer sheath; the cable comprises a conductor shielding layer, an insulating layer and an insulation shielding layer, wherein the conductor shielding layer, the insulating layer and the insulation shielding layer are co-extruded from inside to outside, and are longitudinally laminated on the outer wall of the conductor to form an insulation wire core with the conductor, the metal shielding layer is extruded in a split-phase mode on the outer side of the insulation shielding layer, the three-phase insulation wire core containing the metal shielding layer forms a cable core, the gap between the cable cores is filled with fireproof plasticine, a cable core wrapping belt is longitudinally wrapped on the outer side of the cable core, the sheath fire-proof layer is extruded on the outer ring of the cable core wrapping belt, and.

2. The flexible medium voltage fire cable of claim 1, wherein the conductor is a compacted stranded round copper or aluminum conductor.

3. The flexible medium voltage fire cable of claim 1, wherein the conductor shield and insulation shield are semiconductive shields.

4. The flexible medium voltage fire cable according to claim 1, wherein the insulation layer is a chemically cross-linked polyethylene insulation.

5. The flexible medium voltage fire cable according to claim 1, wherein the metallic shielding layer is an extruded copper sheath.

6. The flexible medium-voltage fireproof cable according to claim 1, wherein the cable core wrapping tape is a glass fiber tape.

7. The flexible medium voltage fire cable of claim 1, wherein the sheath fire barrier is an interlocking armored corrugated copper sheath.

8. The flexible medium voltage fireproof cable of claim 1, wherein the outer sheath is made of a low smoke, halogen free, flame retardant polyolefin material.