CN212380154U

CN212380154U - Mineral insulated cable

Info

Publication number: CN212380154U
Application number: CN202021470433.0U
Authority: CN
Inventors: 马荣丰
Original assignee: Kunming Red Star Cable Co ltd
Current assignee: Kunming Red Star Cable Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-01-19
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a mineral insulated cable, including four, four wire cores the surface of wire core all fixed parcel has the insulating layer, and the insulating layer parcel has the shielding layer outward, four on the cross section wire core is two rows of arrangements from top to bottom, four be provided with a plurality of cross supports between the wire core, and the through-hole has been seted up in the middle of cross support, is provided with fire-retardant strip in the through-hole, and the both ends of cross support are provided with the enhancement layer respectively, and the top and the bottom of cross support are provided with fixed stabilizer blade, and the outside of fixed stabilizer blade is the arc, and the outmost of enhancement layer and shielding layer is provided with outer protective sheath; the beneficial effects of the utility model reside in that, a bunched cable is provided, practice thrift the length of cable, reduce cost increases the stability that cross support improves the cable, and the enhancement layer has increased the intensity of cable, and outer protective sheath has good fire-retardant, high temperature resistant and stand wear and tear effect, reduces the influence of external environment to the cable.

Description

Mineral insulated cable

Technical Field

The utility model relates to a cable field especially relates to a mineral insulated cable.

Background

The mineral insulated cable is characterized in that a copper sheath wraps a copper conductor core wire, magnesium oxide powder is used as an inorganic insulating material to isolate a conductor and the sheath, a proper protective sleeve can be selected as required on the outermost layer, and a similar cable which replaces the copper sheath to wrap the core wire and the insulating material is called as a mineral insulated metal sheath cable and is widely used due to the excellent fireproof characteristic; however, because of the influence of the traditional production process and equipment, the production and supply length of the mineral insulated cable are difficult to meet the requirements of various projects, and the problem of the sealing property of the connecting part is difficult to solve by solving the length problem through butt joint.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mineral insulated cable to prior art not enough.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

The utility model provides a mineral insulated cable, it includes that the wire core is four, four the surface of wire core all fixed parcel has the insulating layer, the outer parcel of insulating layer has the shielding layer, four on the cross section the wire core is two rows from top to bottom and arranges, four be provided with a plurality of cross supports between the wire core, the through-hole has been seted up to the centre of cross support, be provided with fire-retardant strip in the through-hole, cross support's both ends are provided with the enhancement layer respectively, cross support's top and bottom are provided with fixed stabilizer blade, the outside of fixed stabilizer blade is the arc, the outermost of enhancement layer and shielding layer is provided with outer protective sheath.

Further, the enhancement layer includes steel wire, high strength layer and protective sheath, the steel wire is located the inside of enhancement layer, the outside parcel of steel wire has the high strength layer, the outside parcel of high strength layer has the protective sheath, the end connection of protective sheath and cross support.

Furthermore, the insulating layer is made of inorganic mineral insulating materials, the shielding layer is formed by twisting six 0.1mm tin-plated copper wires into a bundle, the bundle is interwoven into a bundle by 9 bundles, and the bundle surrounds the outer side of the insulating layer, and the density of the bundle is not less than ninety-three percent.

Further, the high-strength layer is composed of carbon fiber, and the protective sheath is composed of polyethylene.

Furthermore, the outer protective sleeve sequentially comprises a wrapping belt, a fire-resistant layer, a flame-retardant layer and a rubber sheath from inside to outside.

Further, the wrapping belt is formed by overlapping and wrapping water-blocking belts, the fire-resistant layer is a fire-resistant mica belt, and the fire-resistant layer is composed of polyethylene, polyvinyl chloride and thermoplastic polyurethane.

Furthermore, fire extinguishing powder is filled in the fire retardant strips.

Furthermore, the cross-shaped support is formed by connecting four partition plates, and the cross-shaped support forms a cross shape on the cross section.

Furthermore, shielding layer and protective sheath are filled with tensile fibre outward, tensile fibre's surface is provided with outer protective sheath.

The beneficial effects of the utility model reside in that, a bunched cable is provided, practice thrift the length of cable, reduce cost increases the stability that cross support improves the cable, and the enhancement layer has increased the intensity of cable, and outer protective sheath has good fire-retardant, high temperature resistant and stand wear and tear effect, reduces the influence of external environment to the cable.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1. a wire core; 101. an insulating layer; 102. a shielding layer; 103. a tensile fiber; 2. a cross-shaped bracket; 201. a fixed leg; 202. a through hole; 3. an enhancement layer; 301. a steel wire; 302. a high-strength layer; 303. a protective sleeve; 4. an outer protective sheath; 401. wrapping a wrapping belt; 402. a refractory layer; 403. a flame retardant layer; 404. a rubber sheath; 5. a flame retardant strip.

Detailed Description

The present invention is further illustrated by the following examples, but is not limited to the contents of the specification.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in the figure: a mineral insulated cable comprises four conductor cores 1, wherein an insulating layer 101 is fixedly wrapped on the outer surface of each conductor core 1, a shielding layer 102 is wrapped outside the insulating layer 101, the four conductor cores 1 are arranged in two rows in the vertical direction on a cross section, a plurality of cross-shaped supports 2 are arranged between the conductor cores 1, the cross-shaped supports 2 are formed by connecting four partition plates, the cross-shaped supports 2 form a cross shape on the cross section, a through hole 202 is formed in the middle of each cross-shaped support 2, a flame-retardant strip 5 is arranged in each through hole 202, fire-extinguishing powder is filled in each flame-retardant strip 5, two ends of each cross-shaped support 2 are respectively provided with an enhancement layer 3, each enhancement layer 3 comprises a steel wire 301, a high-strength layer 302 and a protective sleeve 303, the steel wire 301 is positioned inside the enhancement layer 3, and the high, the outside parcel of high strength layer 302 has protective sheath 303, the end connection of protective sheath 303 and cross support 2, the top and the bottom of cross support 2 are provided with fixed stabilizer blade 201, the outside of fixed stabilizer blade 201 is the arc, can protect the shape of cable, prolongs its life.

The insulating layer 101 is made of an inorganic mineral insulating material, the shielding layer 102 is formed by twisting six 0.1mm tin-plated copper wires into a bundle, and the bundle is interwoven into a bundle by 9 bundles and then surrounds the outer side of the insulating layer 101, so that the density of the bundle is not less than ninety-three percent, and the shielding layer has a good shielding effect.

The high strength layer 302 is comprised of carbon fiber and the protective sheath 303 is comprised of polyethylene.

The shielding layer 102 and the protective sleeve 303 are filled with tensile fibers 103, the outer surface of the tensile fibers 103 is provided with an outer protective sleeve 4, and the outer protective sleeve 4 sequentially comprises a wrapping belt 401, a fire-resistant layer 402, a flame-retardant layer 403 and a rubber outer skin 404 from inside to outside.

The wrapping belt 401 is formed by overlapping and wrapping water-blocking tapes, the fire-resistant layer 402 is a fire-resistant mica tape, and the fire-resistant layer 403 is composed of polyethylene, polyvinyl chloride and thermoplastic polyurethane, so that the fire-retardant effect is improved.

The beneficial effects of the utility model reside in that, a bunched cable is provided, practice thrift the length of cable, reduce cost increases the stability that cross support 2 improved the cable, and enhancement layer 3 has increased the intensity of cable, and outer protective sheath 4 has good fire-retardant, high temperature resistant and stand wear and tear effect, reduces the influence of external environment to the cable.

It is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. A mineral insulated cable characterized by: including four, four wire cores the surface of wire core all fixed parcel has the insulating layer, the outer parcel of insulating layer has the shielding layer, four on the cross section wire core is two rows from top to bottom and arranges four be provided with a plurality of cross supports between the wire core, the through-hole has been seted up to cross support's centre, be provided with fire-retardant strip in the through-hole, cross support's both ends are provided with the enhancement layer respectively, cross support's top and bottom are provided with fixed stabilizer blade, the outside of fixed stabilizer blade is the arc, the outermost of enhancement layer and shielding layer is provided with outer protective sheath.

2. A mineral-insulated cable according to claim 1, characterized in that: the enhancement layer includes steel wire, high strength layer and protective sheath, the steel wire is located the inside of enhancement layer, the outside parcel of steel wire has the high strength layer, the outside parcel on high strength layer has the protective sheath, the end connection of protective sheath and cross support.

3. A mineral-insulated cable according to claim 1, characterized in that: the insulating layer is made of inorganic mineral insulating materials, the shielding layer is formed by twisting six 0.1mm tin-plated copper wires into a bundle, the bundle is interwoven into a strand by 9 bundles, and the strand surrounds the outer side of the insulating layer, and the density of the strand is not less than ninety-three percent.

4. A mineral-insulated cable according to claim 2, characterized in that: the high-strength layer is composed of carbon fibers, and the protective sleeve is composed of polyethylene.

5. A mineral-insulated cable according to claim 1, characterized in that: the outer protective sleeve sequentially comprises a wrapping belt, a fire-resistant layer, a flame-retardant layer and a rubber sheath from inside to outside.

6. A mineral-insulated electric cable according to claim 5, characterized in that: the wrapping belt is formed by overlapping and wrapping water-blocking tapes, the fire-resistant layer is a fire-resistant mica tape, and the fire-resistant layer is composed of polyethylene, polyvinyl chloride and thermoplastic polyurethane.

7. A mineral-insulated cable according to claim 1, characterized in that: and fire extinguishing powder is filled in the fire-retardant strips.

8. A mineral-insulated cable according to claim 1, characterized in that: the cross-shaped support is formed by connecting four partition plates, and the cross-shaped support forms a cross shape on the cross section.

9. A mineral-insulated cable according to claim 1, characterized in that: the shielding layer and the protective sleeve are filled with tensile fibers, and the outer surface of each tensile fiber is provided with an outer protective sleeve.