CN215496054U - Novel flexible mineral substance insulation fireproof cable - Google Patents

Abstract

The utility model provides a novel flexible mineral substance insulated fireproof cable, which comprises a conductive core, wherein the conductive core comprises a flexible central core and a plurality of wire cores, the plurality of wire cores are arranged around the flexible central core, a first inorganic material insulating layer is coated outside the flexible central core, and a second inorganic material insulating layer is coated outside the wire cores; the flexible central core is coaxially provided with a plurality of first thin copper wires, the wire core is formed by twisting a plurality of second thin copper wires, and gaps among the first thin copper wires are larger than gaps among the second thin copper wires; the outer cladding of electrically conductive core has the isolation layer, is provided with a plurality of arcuation archs rather than coaxial being used for fixed sinle silk position on the isolation layer, sets up inorganic material filling layer between isolation layer and the sinle silk, is provided with the armor outside the isolation layer, is provided with the flame retardant coating outside the armor, is provided with flexible soft sheath outside the flame retardant coating. The utility model provides a novel flexible mineral insulated fireproof cable, which solves the problem that a wire core is easily damaged in the structure in the prior art.

Description

Novel flexible mineral substance insulation fireproof cable

Technical Field

The application relates to the technical field of power transmission, particularly, relate to a novel flexible mineral substance insulation fireproof cable.

Background

The flexible mineral insulated cable, commonly known as a fireproof cable, can withstand combustion for 3 hours at a flame temperature of 950 ℃ and a voltage of 1000V without breakdown. The flexible mineral insulated cable is characterized in that the cable is of a structure, the main materials of the cable are inorganic materials, a plurality of annealed copper stranded wires are used as conducting wires, inorganic mineral alloy mica tapes and mineral compounds are used as insulation and protective sleeves, and the cable is further provided with an anti-corrosion outer sleeve and the like. The chinese utility model patent with publication No. CN212934180U, entitled "a mineral insulated fireproof cable", has a structure that can achieve flexible bending, but is very easy to damage the core due to the pressing between the cores when bending because the cores are merely pressed together.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a novel flexible mineral substance insulation fireproof cable, it has solved prior art's structure and has very easily caused the destroyed problem of sinle silk.

The embodiment of the application is realized by the following technical scheme:

the utility model provides a novel flexible mineral substance insulated fireproof cable, which comprises a conductive core, wherein the conductive core comprises a flexible central core and a plurality of wire cores, the plurality of wire cores are arranged around the flexible central core, a first inorganic material insulating layer is coated outside the flexible central core, and a second inorganic material insulating layer is coated outside the wire cores; a plurality of first thin copper wires are coaxially arranged in the flexible central core, the wire core is formed by twisting a plurality of second thin copper wires, and gaps among the first thin copper wires are larger than gaps among the second thin copper wires; the outer cladding of above-mentioned electrically conductive core has the isolation layer, is provided with a plurality of arcuation archs rather than coaxial being used for fixed above-mentioned sinle silk position on the above-mentioned isolation layer, sets up inorganic material filling layer between above-mentioned isolation layer and the above-mentioned sinle silk, is provided with the armor outside the above-mentioned isolation layer, is provided with the flame retardant coating outside the above-mentioned armor, is provided with flexible soft sheath outside the above-mentioned flame retardant coating.

In some embodiments of the present invention, the arc-shaped protrusion is disposed between two adjacent wire cores for filling a gap.

In some embodiments of the present invention, the arc-shaped protrusion includes a left arc and a right arc symmetrically disposed, one end of the left arc is connected to one end of the right arc, and the left arc and the right arc are both concave toward the symmetry axis.

In some embodiments of the present invention, the first inorganic material insulating layer and the second inorganic material insulating layer are both made of synthetic mica.

In some embodiments of the present invention, the isolation layer is formed by winding a plurality of alkali-free glass fiber insulation wires, the inorganic material filling layer is made of glass fiber cotton, the armor layer is made of galvanized steel, and the flexible soft sheath layer is made of copper.

In some embodiments of the present invention, the material of the fire-proof layer is a high fire-proof ceramic fire-proof composite tape.

In some embodiments of the present invention, a fire-resistant layer is disposed between the isolation layer and the armor layer, and the fire-resistant layer is made of a synthetic mica tape.

In some embodiments of the present invention, an inorganic material filling layer is disposed between the flexible core and the wire core.

The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:

the utility model provides a novel flexible mineral substance insulated fireproof cable which is provided with a conductive core, a flexible middle core, a first fine copper wire, a first inorganic material insulating layer, a wire core, a second fine copper wire, a second inorganic material insulating layer, an inorganic material filling layer, an isolating layer, an arc-shaped bulge, an armor layer, a fireproof layer and a flexible soft sheath. According to the utility model, the gaps among the first thin copper wires are set to be larger than the gaps among the second thin copper wires, so that when the whole cable is bent, certain space can be provided for the movement and deformation among the wire cores, the wire cores of the cable are not damaged in the bending process, and the cable has better deformation capacity, so that the cable is more beneficial to bending and can meet the wiring requirements under more different environments. The arc-shaped protrusions are used for filling gaps, the inorganic material filling layer is filled after the arc-shaped protrusions are filled, tightness among all layers in the cable is guaranteed, and meanwhile the inorganic material filling layer is preferably made of flexible materials. The arc-shaped protrusion comprises a left arc and a right arc which are symmetrically arranged, one ends of the left arc and the right arc are connected, the left arc and the right arc are both concave towards the symmetric axis, and the arc-shaped protrusion is composed of the left arc and the right arc which are symmetric to each other, so that the arc-shaped protrusion can be better matched with the wire core. Armor and flexible soft sheath have better intensity, have increased the toughness of cable to prolonged the life of cable, through setting up the flame retardant coating, can improve the fire prevention and the high temperature resistance effect of cable. The utility model provides a novel flexible mineral insulated fireproof cable, which solves the problem that a wire core is easily damaged in the structure in the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

FIG. 2 is a schematic view of a structure of an isolation layer according to the present invention;

FIG. 3 is a schematic view of the structure of the conductive core of the present invention;

icon: 1-a conductive core; 101-a flexible core; 1011-a first fine copper wire; 1012-first inorganic material insulating layer; 102-a wire core; 1021-a second fine copper wire; 1022 — a second inorganic material insulating layer; 2-inorganic material filling layer; 3-an isolating layer; 301-arc-like protrusion; 3011-left arc; 3012-right arc; 4-a refractory layer; 5-an armor layer; 6-a fireproof layer; 7-flexible soft sheath.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "inner", "outer", etc. are used to indicate an orientation or positional relationship based on that shown in the drawings or that the product of the application is usually placed in use, this is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present application.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1-3, the present invention provides a novel flexible mineral insulated fireproof cable, which includes a conductive core 1, the conductive core 1 includes a flexible central core 101 and a plurality of wire cores 102, the plurality of wire cores 102 are disposed around the flexible central core 101, the flexible central core 101 is coated with a first inorganic material insulating layer 1012, and the wire cores 102 are coated with a second inorganic material insulating layer 1022; the flexible central core 101 is coaxially provided with a plurality of first thin copper wires 1011, the wire core 102 is formed by twisting a plurality of second thin copper wires 1021, the clearance between the first thin copper wires 1011 is larger than the clearance between the second thin copper wires 1021, a plurality of wire cores 102 in the existing cable structure are only extruded together, the utility model is to easily damage the wire core 102 by pressing each other when bending by setting the gap between the first thin copper wires 1011 to be larger than the gap between the second thin copper wires 1021, when the whole cable is bent, the gaps among the first thin copper wires 1011 can provide certain space for the movement and deformation among the wire cores 102, so that the wire cores 102 cannot be damaged in the bending process of the cable, and make the cable have better deformability for the cable is more easily buckled, more can adapt to the wiring requirement under more different environment. The outer cladding of electrically conductive core 1 has isolation layer 3, be provided with a plurality ofly on the isolation layer 3 rather than coaxial be used for the protruding 301 of arcuation of fixed sinle silk 102 position, set up inorganic material filling layer 2 between isolation layer 3 and the sinle silk 102, set up inorganic material filling layer 2 between flexible center 101 and the sinle silk 102, the protruding 301 of arcuation is used for filling the space, rethread inorganic material filling layer 2 after filling through the protruding 301 of arcuation, guarantee the compactness between the inside each layer of cable, the flexible material is preferred for use to inorganic material filling layer 2 simultaneously, the protruding 301 setting of arcuation is used for filling the space between two adjacent sinle silks 102. The arc-shaped protrusion 301 comprises a left arc 3011 and a right arc 3012 which are symmetrically arranged, one ends of the left arc 3011 and the right arc 3012 are connected, and the left arc 3011 and the right arc 3012 are both concave towards the symmetry axis. The arc-shaped protrusion 301 is composed of two left arcs 3011 and right arcs 3012 which are symmetrical to each other, so that the arc-shaped protrusion can be better matched with the wire core 102. The isolation layer 3 is provided with armor 5 outward, and armor 5 is provided with flame retardant coating 6 outward, and flame retardant coating 6 is provided with flexible soft sheath 7 outward, and armor 5 and flexible soft sheath 7 have better intensity, have increased the toughness of cable to the life of cable has been prolonged, through setting up flame retardant coating 6, the fire prevention and the high temperature resistance effect of cable can be improved. The utility model provides a novel flexible mineral insulated fireproof cable, which solves the problem that a wire core 102 is easily damaged in the structure in the prior art.

In the present embodiment, the material of the first inorganic material insulating layer 1012 and the second inorganic material insulating layer 1022 are both synthetic mica. Be provided with flame retardant coating 4 between isolation layer 3 and the armor 5, the material of flame retardant coating 4 is synthetic mica tape, and synthetic mica tape does not contain crystal water, and fusing point 1375 ℃, and safety margin is big, and high temperature resistance can be good with resistant combustion behavior, and this cable can work for a long time under 125 ℃ ambient temperature, also can work for a short time under 1080 ℃ under emergency. The isolation layer 3 is formed by winding a plurality of alkali-free glass fiber insulating wires, the alkali-free glass fiber insulating wires are high in strength, high in elastic coefficient, good in rigidity and good in water resistance, the cable can have a waterproof effect, the practicability of the cable is further improved, and the corresponding number of layers are wound according to actual use conditions, so that the cable is not limited. The inorganic material filling layer 2 is made of glass fiber cotton which is an inorganic non-metallic material and has good insulation property, strong heat resistance, good corrosion resistance and high mechanical strength. The armor layer 5 is made of galvanized steel. The flexible soft sheath 7 is made of copper, has the characteristics of mechanical impact resistance and flexible bending, can avoid the problems of wiring terminal and delivery length frequently encountered when a rigid mineral insulated cable is designed and installed, is made of an inorganic material, does not generate acid gas under the condition of fire, releases gas when the material taken from the cable burns according to GB/T17650.2-1998, and has a PH value of over 5.0 and an electric conductivity of about 1.0.

In this embodiment, the material of the fire-proof layer 6 is a high fire-retardant ceramic fire-proof and fire-proof composite tape, which has the following advantages: 1. the fire-proof and fire-proof material can be formed into a ceramic shell under the condition of 350-3000 ℃ with or without flame, the fire-proof and fire-proof performance is excellent, 2, the fire-proof grade can reach the A-grade standard of GB12666.6, and can also pass the CWZ highest-grade test of British BS6387, 3, the smoke after combustion is low-smoke, halogen-free, phosphorus-nitrogen-free, heavy metal-free, nontoxic and harmless, the smoke toxicity safety grade reaches the ZA1 grade of the highest safety grade of high polymer materials, and no secondary damage can be caused to people, and 3, the environment-friendly standard is RoHS. The cable has the characteristics of water resistance, no moisture absorption, high strength, excellent mechanical property and excellent electrical insulation property, and can further resist fire and high temperature, so that the cable is suitable for more high-temperature environments with different degrees.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (8)

1. A novel flexible mineral substance insulated fireproof cable is characterized by comprising: the conductive core comprises a flexible central core and a plurality of wire cores, the plurality of wire cores are arranged around the flexible central core, a first inorganic material insulating layer is coated outside the flexible central core, and a second inorganic material insulating layer is coated outside the wire cores; the flexible middle core is coaxially provided with a plurality of first thin copper wires, the wire core is formed by twisting a plurality of second thin copper wires, and gaps among the first thin copper wires are larger than gaps among the second thin copper wires; the insulation layer is coated outside the conductive core, a plurality of arc-shaped protrusions which are coaxial with the insulation layer and used for fixing the positions of the conductive cores are arranged on the insulation layer, an inorganic material filling layer is arranged between the insulation layer and the conductive cores, an armor layer is arranged outside the insulation layer, a fireproof layer is arranged outside the armor layer, and a flexible soft sheath is arranged outside the fireproof layer.

2. The novel flexible mineral insulated fireproof cable of claim 1,

the arc-shaped protrusion is arranged between two adjacent wire cores and used for filling gaps.

3. A novel flexible mineral-insulated fireproof cable according to claim 2,

the arc-shaped protrusion comprises a left arc and a right arc which are symmetrically arranged, the left arc is connected with one end of the right arc, and the left arc and the right arc are both concave towards the symmetric axis.

4. The novel flexible mineral insulated fireproof cable of claim 1,

the first inorganic material insulating layer and the second inorganic material insulating layer are both made of synthetic mica.

5. The novel flexible mineral insulated fireproof cable of claim 1,

the isolation layer is formed by winding a plurality of alkali-free glass fiber insulating wires, the inorganic material filling layer is made of glass fiber cotton, the armor layer is made of galvanized steel, and the flexible soft sheath is made of copper.

6. The novel flexible mineral insulated fireproof cable of claim 1,

the fireproof layer is made of a high-flame-retardant ceramic fireproof and fireproof composite belt.

7. A novel flexible mineral-insulated fireproof cable according to any one of claims 1 to 6,

and a fire-resistant layer is arranged between the isolation layer and the armor layer, and the fire-resistant layer is made of synthetic mica tape.

8. A novel flexible mineral-insulated fireproof cable according to any one of claims 1 to 6,

an inorganic material filling layer is arranged between the flexible middle core and the wire core.

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