CN211604772U

CN211604772U - Flexible mineral insulated cable

Info

Publication number: CN211604772U
Application number: CN201922371078.5U
Authority: CN
Inventors: 邢风华; 邢国辉; 邢宁辉; 张义勇; 乔硕; 刘存凯
Original assignee: Zhuhai Wire And Cable Co ltd
Current assignee: Zhuhai Wire And Cable Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-09-29
Anticipated expiration: 2029-12-25

Abstract

The embodiment of the utility model discloses a flexible mineral insulated cable, which relates to the technical field of electric wires and cables, and comprises a cable body and a cable protection skin, wherein the cable protection skin is wrapped on the cable body; the cable protection skin comprises a mineral fire insulation layer and an outer protective layer which are sequentially wrapped outside the cable body; the outer protective layer comprises a temperature-sensitive insulating layer and a transparent layer, and the temperature-sensitive insulating layer and the transparent layer are sequentially arranged from inside to outside; the cable body includes the conductor, wraps up the mineral substance insulating layer of conductor, the isolation layer of cladding outside the mineral substance insulating layer, the flame retardant coating of cladding outside the isolation layer. The flexible mineral insulated cable provided by the embodiment of the utility model is provided with the cable protection skin outside the cable body, which plays an effective protection role for the cable body; the temperature-sensitive insulating layer and the transparent layer are arranged in the cable protective sheath, and when the cable is interfered by high temperature, the temperature-sensitive material of the temperature-sensitive insulating layer turns yellow when the temperature exceeds a safety value, so that a user can find the temperature-sensitive material in time, and potential safety hazards are eliminated in time.

Description

Flexible mineral insulated cable

Technical Field

The embodiment of the utility model provides a relate to wire and cable technical field, concretely relates to flexible mineral insulated cable.

Background

Mineral Insulated Cable (Mineral Insulated Cable) is abbreviated MI Cable. At present, the structure characteristics can be divided into rigid and flexible. Rigid mineral-insulated cables suffer from the following drawbacks: 1) the process conditions are high, and long-term production cannot be realized; 2) the construction is complicated and rigorous, because the metal sheath is extremely difficult to bend, the difficulty is high during installation, expensive special accessories are needed, and the bending radius can reach (6D) by using a special tool baking gun, a bending runner and the like during installation; 3) the fire-proof performance requirement is high.

Due to the defects, the rigid mineral insulated cable gradually falls off the market in developed countries in Europe and America, and the flexible mineral insulated cable is bound to be the mainstream cable product.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a flexible mineral insulated cable to solve the technological condition height that rigidity mineral insulated cable exists among the prior art, the construction is complicated.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

according to a first aspect of embodiments of the present invention, a flexible mineral insulated cable comprises a cable body and a cable protection skin, wherein the cable protection skin is wrapped on the cable body; the cable protection skin comprises a mineral fire insulation layer and an outer protective layer which are sequentially wrapped outside the cable body; the outer protective layer comprises a temperature-sensitive insulating layer and a transparent layer, and the temperature-sensitive insulating layer and the transparent layer are sequentially arranged from inside to outside; the cable body includes conductor, parcel the mineral substance insulating layer of conductor, the cladding is in the isolation layer outside the mineral substance insulating layer, the cladding is in the flame retardant coating outside the isolation layer.

Further, the fire barrier layer is coated with a high-flame-retardant sheath layer.

Further, the outer jacket is a low-smoke halogen-free jacket.

Further, the conductor is formed by stranding a plurality of single-wire copper wires.

Further, the transparent layer is doped with a phosphor.

Further, the transparent layer comprises a first transparent layer and a second transparent layer, fluorescent agents are doped in the first transparent layer, and the temperature-sensitive insulating layer, the first transparent layer and the second transparent layer are connected into a whole through transparent glue in sequence.

The second transparent layer is coated with a corrosion-resistant coating.

Further, the number of the conductors is four.

Furthermore, a foaming filling layer and a filling rope are arranged in the cable body.

The embodiment of the utility model provides a have following advantage:

the cable protection skin is arranged outside the cable body of the flexible mineral insulated cable, so that the cable body is effectively protected, the using effect of the cable is better, the service life of the cable is prolonged, and the cable requirement of long-time continuous use is met; the temperature-sensitive insulating layer and the transparent layer are arranged in the cable protective sheath, and when the cable is accidentally interfered by high temperature, the temperature-sensitive material of the temperature-sensitive insulating layer turns yellow when the temperature exceeds a safety value, so that a user can find the temperature-sensitive insulating layer in time, and potential safety hazards are eliminated in time.

The embodiment of the utility model provides a structure and material of flexible mineral insulated cable all adopt the mineral compound, have compensatied that rigidity mineral insulated cable structure is hard, defects such as difficult bending, have fire-resistant, that the current-carrying capacity is big, impulse voltage resistance, resistant mechanical damage, do not have halogen-free five poison, explosion-proof, waterproof, corrosion-resistant, longe-lived, safety, resistant overload, high temperature resistant, characteristics such as with low costs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural diagram of a flexible mineral-insulated cable according to embodiment 1 of the present invention;

in the figure: the cable comprises a cable body 1, a cable protection skin 2, a mineral fire insulation layer 21, an outer protection layer 22, a temperature-sensitive insulation layer 221, a transparent layer 222, a first transparent layer 2221, a second transparent layer 2222, a conductor 11, a mineral insulation layer 12, an isolation layer 13, a fire-proof layer 14, a high-fire-retardant sheath layer 15, a foaming filling layer 16 and a filling rope 17.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The flexible mineral insulated cable shown in fig. 1 comprises a cable body 1 and a cable protective sheath 2, wherein the cable protective sheath 2 is wrapped on the cable body 1; the cable protection skin 2 comprises a mineral fire insulation layer 21 and an outer protection layer 22 which are sequentially wrapped outside the cable body 1; the outer protective layer 22 comprises a temperature-sensitive insulating layer 221 and a transparent layer 222, wherein the temperature-sensitive insulating layer 221 and the transparent layer 222 are arranged in sequence from inside to outside; cable body 1 includes conductor 11, the parcel that is formed by the transposition of many monofilament copper the mineral substance insulating layer 12 of conductor 11, the cladding are in isolation layer 13 outside the mineral substance insulating layer 12, the cladding are in flame retardant coating 14 outside isolation layer 13, the outside cladding that separates flame retardant coating 14 has high fire-retardant restrictive coating 15.

According to the technical scheme, the cable protection skin is arranged outside the cable body, so that the cable body is effectively protected, the using effect of the cable is better, the service life of the cable is prolonged, and the requirement of the cable for long-time continuous use is met; the temperature-sensitive insulating layer and the transparent layer are arranged in the cable protective sheath, and when the cable is accidentally interfered by high temperature, the temperature-sensitive material of the temperature-sensitive insulating layer turns yellow when the temperature exceeds a safety value, so that a user can find the temperature-sensitive insulating layer in time, and potential safety hazards are eliminated in time.

The outer jacket 22 is a low smoke zero halogen sheath. Through the technical scheme, toxic and corrosive gases generated during combustion can be reduced, and the prepared cable is more environment-friendly.

The transparent layer 222 includes a first transparent layer 2221 and a second transparent layer 2222, the first transparent layer 2221 is doped with a fluorescent agent, and the temperature-sensitive insulating layer 221, the first transparent layer 2221 and the second transparent layer 2222 are sequentially connected into a whole through transparent adhesive. The second transparent layer plays a certain role in protecting the first transparent layer, and the fluorescent agent is prevented from being lost when the first transparent layer is directly exposed outside; the fluorescer is environment-friendly colorless fluorescer, when the cable is accidentally interfered by high temperature under the condition of insufficient light, the temperature sensitive material of the temperature sensitive insulating layer turns yellow when the temperature exceeds a safety value, and the fluorescer emits yellow light under the action of the colorless fluorescer, so that the prompt effect is stronger.

The second transparent layer 2222 is coated with a corrosion-resistant coating, so that the corrosion resistance of the cable can be enhanced.

The number of the conductors 11 is four.

The cable body 1 is also internally provided with a foaming filling layer 16 and a filling rope 17. Through this technical scheme, increased the cable body to the protective properties of conductor, strengthened its tensile ability.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A flexible mineral insulated cable, characterized in that the flexible mineral insulated cable comprises a cable body (1) and a cable protective sheath (2), wherein the cable protective sheath (2) is wrapped on the cable body (1); the cable protection skin (2) comprises a mineral fire insulation layer (21) and an outer protective layer (22) which are sequentially wrapped outside the cable body (1); the outer protective layer (22) comprises a temperature-sensitive insulating layer (221) and a transparent layer (222), and the temperature-sensitive insulating layer (221) and the transparent layer (222) are sequentially arranged from inside to outside; the cable body (1) comprises a conductor (11), a mineral insulating layer (12) wrapping the conductor (11), an isolating layer (13) wrapping the mineral insulating layer (12), and a fireproof layer (14) wrapping the isolating layer (13).

2. A flexible mineral-insulated cable according to claim 1, characterized in that the fire-resistant layer (14) is externally coated with a highly flame-retardant sheath layer (15).

3. A flexible mineral-insulated cable according to claim 1, characterized in that the outer sheath (22) is a low smoke zero halogen sheath.

4. A flexible mineral-insulated cable according to claim 1, characterized in that the conductor (11) is stranded of a plurality of individual wires of copper.

5. The flexible mineral-insulated cable according to claim 1, wherein the transparent layer (222) comprises a first transparent layer (2221) and a second transparent layer (2222), and the temperature-sensitive insulating layer (221), the first transparent layer (2221) and the second transparent layer (2222) are connected into a whole through transparent glue in sequence.

6. A flexible mineral-insulated cable according to claim 5, characterized in that the second transparent layer (2222) is coated with a corrosion-resistant coating.

7. A flexible mineral-insulated cable according to claim 1, characterized in that the number of conductors (11) is four.

8. A flexible mineral-insulated cable according to claim 1, characterized in that a foamed filling layer (16) and a filling rope (17) are also provided in the cable body (1).