Environment-friendly heat insulation type medium-voltage cross-linked flexible fireproof cable

Abstract

The utility model discloses an environment-friendly heat insulation type medium-voltage cross-linked flexible fireproof cable, which comprises a cable core, the cable core comprises three wire cores and a filling layer, a mica tape wrapping layer is arranged outside the cable core, the mica tape wrapping layer is spirally wound and connected outside the cable core, and the filling layer is arranged outside the mica tape wrapping layer. A composite fireproof layer is arranged outside the mica tape wrapping layer, the composite fireproof layer is attached to the mica tape wrapping layer, a composite heat insulation layer is arranged outside the composite fireproof layer, the composite heat insulation layer is attached to the composite fireproof layer, a flexible armor layer is arranged outside the composite heat insulation layer, and a fireproof layer is arranged outside the flexible armor layer. The flexible armor layer is attached to the composite heat insulation layer, the outer sheath is arranged outside the flexible armor layer, the heat insulation layer in the fireproof cable is of a double-layer structure, external heat is effectively blocked, heat is prevented from being conducted into the cable in a high-temperature and high-heat state, and the heat insulation performance of the cable is improved; and the use effect of the fireproof cable is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a kind of environment-friendly heat insulation type medium voltage crosslinking flexible fireproof cable. BACKGROUND

[0002] Cable is made of one or more mutually insulated conductors and outer insulation protective layer, the wire that power or information is transmitted from one place to another, there are power cable, control cable, compensation cable, shielded cable, high temperature cable, computer cable, signal cable, coaxial cable, fire-resistant cable, marine cable, mine cable, aluminum alloy cable and so on, they are all by single or multi-strand wire and insulation layer composition, to connect circuit, electric appliance etc..Fireproof cable is a kind of cable that can resist the spread of fire under certain conditions, it can keep normal operation for a certain time in fire, so as to guarantee the power supply of critical equipment and the safety evacuation of personnel.

[0003] The utility model discloses a kind of environment-friendly heat insulation type medium voltage crosslinking flexible fireproof cable, including insulation layer, the inner side of the insulation layer is fixedly connected with outer flame-retardant layer, the inner side of the outer flame-retardant layer is fixedly connected with armored layer.The utility model cable main body is provided with outer flame-retardant layer in the position of relatively outer layer, better heat insulation fireproof effect can be provided from outside, inner flame-retardant layer is provided at the outermost side of wire core, then further fire protection can be carried out to it from inside, to ensure that transmission will not be interrupted, fire retardant paint is provided at the outer side of insulation layer, so that cable has insulating property, also can improve fireproof effect, wear-resistant layer set at the outermost side can effectively prevent these fire retardant paint from being scratched off, guarantee safety, further make cable have extremely high heat insulation fireproof and flame-retardant effect, effectively prevent the combustion situation caused by high temperature, guarantee normal transmission of electric power, avoid unnecessary trouble and loss.

[0004] The heat insulation performance of existing fireproof cable is poor, cannot well block external heat, when encountering high temperature and high heat state, heat is conducted to the inside of cable, very easy to cause damage to internal cable core, affect the normal transmission of electric power, shorten the service life of cable, cannot satisfy use demand. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of environment-friendly heat insulation type medium voltage crosslinking flexible fireproof cable, to solve the problem that the heat insulation performance of existing fireproof cable is poor in the above background art, cannot well block external heat, when encountering high temperature and high heat state, heat is conducted to the inside of cable, very easy to cause damage to internal cable core, affect the normal transmission of electric power, shorten the service life of cable, cannot satisfy use demand.

[0006] To achieve the above object, the utility model provides the following technical scheme: an environment -friendly heat -proof type medium -voltage cross -linked flexible fireproof cable, including cable core, the cable core includes wire core and filling layer, wire core is provided with three, the outside of cable core is provided with mica tape wrapping layer, and mica tape wrapping layer is spirally wound and is connected outside the cable core, the outside of mica tape wrapping layer is provided with composite fireproof layer, and composite fireproof layer is attached with mica tape wrapping layer, the outside of composite fireproof layer is provided with composite heat -insulating layer, and composite heat -insulating layer is attached with composite fireproof layer, the outside of composite heat -insulating layer is provided with flexible armor layer, and flexible armor layer is attached with composite heat -insulating layer, the outside of flexible armor layer is provided with outer sheath, and outer sheath is through extrusion forming between flexible armor layer.

[0007] Preferably, the wire core includes a conductor, an insulation layer, a shielding layer, and a heat insulation sleeve, the conductor is twisted by a plurality of copper wires, the insulation layer is arranged outside the conductor, the shielding layer is arranged outside the insulation layer, the insulation layer and the shielding layer are extrusion formed outside the conductor in sequence, and the heat insulation sleeve is arranged outside the shielding layer and attached with the shielding layer.

[0008] Preferably, the composite fireproof layer includes an oxygen barrier layer, a fire-retardant layer, and a fire-resistant layer, the oxygen barrier layer is attached with the mica tape wrapping layer, the fire-retardant layer is arranged outside the oxygen barrier layer, and the fire-resistant layer is arranged outside the fire-retardant layer.

[0009] Preferably, the composite heat-insulating layer includes a first heat-insulating layer and a second heat-insulating layer, the second heat-insulating layer is attached with the fire-resistant layer, the first heat-insulating layer is arranged outside the second heat-insulating layer, a connecting strip is arranged between the first heat-insulating layer and the second heat-insulating layer, the connecting strip is arranged in six, the connecting strip and the first heat-insulating layer and the second heat-insulating layer are integrated, the six connecting strips are equidistantly arranged outside the second heat-insulating layer, and heat-insulating cavities are arranged between the connecting strips.

[0010] Preferably, an anti-aging coating layer is coated on the outer wall of the outer sheath.

[0011] Preferably, the filling layer is arranged at the gap of the three wire cores.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses through the setting of composite heat-insulating layer, and composite heat-insulating layer improves the heat insulation performance of cable, and composite heat-insulating layer constitutes double -deck structure by first heat-insulating layer and second heat-insulating layer, and first heat-insulating layer and second heat-insulating layer all adopt polyurethane, and polyurethane expands when being heated, forms the compact heat insulation, effectively controls the heat transfer, and the heat-insulating cavity arranged between first heat-insulating layer and second heat-insulating layer prolongs the flow period of heat, increases the heat insulation performance of cable, avoids the damage caused by the infiltration of external heat into the cable core.

[0014] The utility model discloses the device through the setting of anti-aging coating, and anti-aging coating adopts nanometer titanium oxide paint, and anti-aging coating evenly coats in the outside of cable, increases the anti-aging performance of outer sheath, improves the service life of cable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the cable core section view of the utility model;

[0017] Figure 3 It is the composite fireproof layer structure diagram of the utility model;

[0018] Figure 4 It is the composite heat insulation layer section view of the utility model;

[0019] Figure 5 It is the outer sheath section view of the utility model.

[0020] In the drawing: 1, cable core;2, wire core;3, filling layer;4, mica tape wrapping layer;5, composite fireproof layer;6, composite heat insulation layer;7, flexible armor layer;8, outer sheath;9, conductor;10, insulation layer;11, shielding layer;12, heat insulation sleeve;13, oxygen barrier layer;14, flame retardant layer;15, fire resistance layer;16, first heat insulation layer;17, second heat insulation layer;18, connecting strip;19, heat insulation cavity;20, anti-aging coating. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0022] Please refer to Figures 1-5The utility model provides an embodiment: a kind of environment-friendly heat insulation type medium voltage crosslinking flexible fireproof cable, including cable core 1, cable core 1 includes wire core 2 and filling layer 3, wire core 2 is provided with three, filling layer 3 is arranged at the clearance of three wire core 2, the outside of cable core 1 is provided with mica tape wrapping layer 4, and mica tape wrapping layer 4 is spirally wound and connects outside cable core 1, the outside of mica tape wrapping layer 4 is provided with composite fireproof layer 5, and composite fireproof layer 5 is attached with mica tape wrapping layer 4, the outside of composite fireproof layer 5 is provided with composite heat insulation layer 6, and composite heat insulation layer 6 is attached with composite fireproof layer 5, the outside of composite heat insulation layer 6 is provided with flexible armor layer 7, and flexible armor layer 7 is attached with composite heat insulation layer 6, the outside of flexible armor layer 7 is provided with outer sheath 8, and outer sheath 8 is formed between flexible armor layer 7 by extrusion, wire core 2 includes conductor 9, insulating layer 10, shielding layer 11 and heat insulation sleeve 12, and conductor 9 is twisted by multiple copper wires, insulating layer 10 is arranged outside conductor 9, shielding layer 11 is arranged outside insulating layer 10, and insulating layer 10 and shielding layer 11 are sequentially formed by extrusion outside conductor 9, heat insulation sleeve 12 is arranged outside shielding layer 11, and heat insulation sleeve 12 is attached with shielding layer 11, composite heat insulation layer 6 improves the heat insulation performance of cable, can carry out interval insulation barrier to external heat, outer sheath 8 uses polyethylene, polyethylene has good environmental protection effect, polyethylene is handled by irradiation crosslinking, utilizes ionizing radiation to irradiate polyethylene, makes it form chemical bond or strong physical binding point between macromolecular chain, to generate three-dimensional network structure polymer with higher molecular weight, improves the fireproof performance of polyethylene.

[0023] Please refer to Figure 1 And Figure 3 Composite fireproof layer 5 includes oxygen barrier layer 13, fire-retardant layer 14 and fire-resistant layer 15, oxygen barrier layer 13 is attached with mica tape wrapping layer 4, fire-retardant layer 14 is arranged outside oxygen barrier layer 13, fire-resistant layer 15 is arranged outside fire-retardant layer 14, composite fireproof layer 5 is multilayer structure, fire-retardant layer 14 uses ceramicized silicone rubber, ceramicized silicone rubber has excellent fireproof, flame-retardant, low smoke, non-toxic and other characteristics, at high temperature, ceramic powder will react with silicone rubber, form self-supporting ceramic body, to play the role of fireproof, will not produce toxic waste gas or harmful solution, avoids secondary pollution to surrounding environment after fire.

[0024] Please refer to Figure 1 And Figure 4, the composite heat insulation layer 6 comprises a first heat insulation layer 16 and a second heat insulation layer 17, the second heat insulation layer 17 is attached to the fireproof layer 15, the first heat insulation layer 16 is arranged outside the second heat insulation layer 17, a connecting strip 18 is arranged between the first heat insulation layer 16 and the second heat insulation layer 17, six connecting strips 18 are arranged, the connecting strip 18 is integrated with the first heat insulation layer 16 and the second heat insulation layer 17, the six connecting strips 18 are equidistantly arranged outside the second heat insulation layer 17, a heat insulation cavity 19 is arranged between the connecting strips 18, the first heat insulation layer 16 and the second heat insulation layer 17 are made of polyurethane, the polyurethane expands when heated to form a dense heat insulation layer, effectively controlling heat transfer, the heat insulation cavity 19 prolongs the flow cycle of heat, increases the heat insulation performance of the cable, and avoids external heat from penetrating into the cable core to cause damage.

[0025] Please refer to Figure 1 and Figure 5 , an anti-aging coating 20 is coated on the outer wall of the outer sheath 8, the anti-aging coating 20 is a nano titanium oxide paint, the anti-aging coating 20 is uniformly coated on the outside of the cable, increasing the anti-aging performance of the outer sheath 8 and improving the service life of the cable.

[0026] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly heat-insulating medium-voltage cross-linked flexible fire-resistant cable, comprising a cable core (1), characterized in that: The cable core (1) comprises a wire core (2) and a filling layer (3), three wire cores (2) are provided, a mica tape wrapping layer (4) is provided on the outside of the cable core (1), and the mica tape wrapping layer (4) is spirally wound and connected on the outside of the cable core (1), a composite fireproof layer (5) is provided on the outside of the mica tape wrapping layer (4), and the composite fireproof layer (5) is adhered to the mica tape wrapping layer (4), a composite heat insulation layer (6) is provided on the outside of the composite fireproof layer (5), and the composite heat insulation layer (6) is adhered to the composite fireproof layer (5), a flexible armor layer (7) is provided on the outside of the composite heat insulation layer (6), and the flexible armor layer (7) is adhered to the composite heat insulation layer (6), and an outer protective layer is provided on the outside of the flexible armor layer (7). The outer sheath (8) and the flexible armor layer (7) are formed by extrusion; the composite thermal insulation layer (6) includes a first thermal insulation layer (16) and a second thermal insulation layer (17), and the second thermal insulation layer (17) is in contact with the fire-resistant layer (15); the first thermal insulation layer (16) is arranged outside the second thermal insulation layer (17); a connecting strip (18) is provided between the first thermal insulation layer (16) and the second thermal insulation layer (17); six connecting strips (18) are provided, and the connecting strips (18) are integrated with the first thermal insulation layer (16) and the second thermal insulation layer (17); the six connecting strips (18) are equidistantly arranged outside the second thermal insulation layer (17); and a thermal insulation cavity (19) is provided between the connecting strips (18).

2. The environmentally friendly, heat-insulated, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The wire core (2) comprises a conductor (9), an insulating layer (10), a shielding layer (11) and a thermal insulation sleeve (12), wherein the conductor (9) is formed by twisting a plurality of copper wires, the insulating layer (10) is arranged outside the conductor (9), the shielding layer (11) is arranged outside the insulating layer (10), and the insulating layer (10) and the shielding layer (11) are sequentially extruded outside the conductor (9), and the thermal insulation sleeve (12) is arranged outside the shielding layer (11), and the thermal insulation sleeve (12) is in contact with the shielding layer (11).

3. The environmentally friendly, heat-insulated, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The composite fireproof layer (5) comprises an oxygen-isolating layer (13), a flame-retardant layer (14) and a fire-resistant layer (15); the oxygen-isolating layer (13) is bonded to the mica tape wrapping layer (4); the flame-retardant layer (14) is arranged outside the oxygen-isolating layer (13); and the fire-resistant layer (15) is arranged outside the flame-retardant layer (14).

4. The environmentally friendly, heat-insulated, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The outer wall of the outer sheath (8) is coated with an anti-aging coating (20).

5. The environmentally friendly, heat-insulated, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The filling layer (3) is arranged at the gaps between the three wire cores (2).

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