Flexible mineral insulation isolation type fireproof cable

Abstract

The utility model discloses a flexible mineral insulation isolation type fireproof cable comprising a plurality of groups of conductor units which are twisted to form a cable core. According to the utility model, the cross-shaped reinforcing plate and the elastic arc-shaped plate are arranged to support and protect an extruded cable, damage to the interior of the cable caused by extrusion deformation of the inner sheath layer is prevented, the reinforcing layer and the reinforcing wires are arranged to increase the strength, damage caused by external forces such as stretching and extrusion is avoided, the inner sheath layer is further protected, and the service life of the cable is prolonged. The service life of the cable is prolonged, the cable is easy to install through the multi-strand thin copper wire stranded conductor and the flexible sheath, the cable can work in a high-temperature environment and isolate a fire source through the isolation layer made of the ceramic silicone rubber material, and the outer sheath layer made of the low-smoke halogen-free flame-retardant material is arranged, so that the service life of the cable is prolonged, and the service life of the cable is prolonged. The release of harmful gases in fire disasters can be reduced; and the fireproof performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a flexible mineral-insulated fireproof cable. Background Technology

[0002] Traditional fire-resistant cables suffer from reduced insulation performance at high temperatures, which can easily lead to short circuits or fires. While some existing mineral-insulated cables offer relatively good fire resistance, they lack flexibility. Therefore, a flexible fire-resistant cable is needed.

[0003] The prior art, disclosed in patent publication number CN216119649U, presents the following technical solution: an isolated mineral-insulated corrugated copper-sheathed flexible fireproof cable, relating to the field of flexible fireproof cable technology, comprising a positioning tube, an anti-pressure frame installed on the outer surface of the positioning tube, a filler installed inside the anti-pressure frame, a metal conductor installed inside the filler, a wrapping layer installed on the outer surface of the metal conductor, an insulation layer installed on the outer surface of the wrapping layer, a protective layer installed on the outer surface of the anti-pressure frame, and a fireproof inner lining layer installed on the outer surface of the protective layer.

[0004] The above technical solution provides tensile and compressive protection to the cable by setting an inner copper sheath and a pressure-resistant frame on the cable. However, the buffering effect is generally poor, which causes the cable to deform, resulting in internal damage to the cable and affecting its performance. Utility Model Content

[0005] The purpose of this invention is to provide a flexible mineral-insulated fireproof cable to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flexible mineral-insulated fireproof cable, comprising conductor units, wherein multiple sets of conductor units are arranged and twisted together to form a cable core.

[0007] A cross-shaped reinforcing plate is provided in the middle of the conductor unit. The conductor units around the cross-shaped reinforcing plate are separated. Elastic arc-shaped plates are fixedly connected around the cross-shaped reinforcing plate. A filling layer is provided in the gap between the cable core, the cross-shaped reinforcing plate and the elastic arc-shaped plates. An inner sheath layer is provided on the outside of the elastic arc-shaped plates. A reinforcing layer is provided on the outside of the inner sheath layer. Corrugated grooves are arranged on the inside and outside of the reinforcing layer. An outer insulation layer is provided on the outside of the reinforcing layer. The outer insulation layer is made of flexible mineral insulating material. A reinforcing wire is provided in the gap between the reinforcing layer and the outer insulation layer. The reinforcing wire is provided along the length of the cable.

[0008] In the above technical solution, the cross-shaped reinforcing plate and the elastic arc plate can support and protect the extruded cable, preventing the inner sheath layer from being deformed and causing damage to the inside of the cable. The reinforcing layer and reinforcing wire can increase the strength and avoid damage due to external forces such as tension and compression, further protecting the inner sheath layer and thus extending the service life of the cable.

[0009] As a further preferred embodiment of this technical solution, the conductor unit includes a conductor, an inner insulating layer is provided on the outside of the conductor, a protective layer is provided on the outside of the inner insulating layer, and the inner insulating layer is made of a flexible mineral insulating material.

[0010] As a further preferred embodiment of this technical solution, a fire-resistant layer is provided on the outside of the outer insulation layer, and an isolation layer is provided on the outside of the fire-resistant layer.

[0011] As a further preferred embodiment of this technical solution, an outer sheath layer is provided on the outside of the isolation layer.

[0012] In the above technical solution, the cable is easy to install by using multiple strands of fine copper wire to form the conductor and a flexible sheath.

[0013] As a further preferred embodiment of this technical solution, the conductor is made of multiple strands of fine copper wire twisted together.

[0014] As a further preferred embodiment of this technical solution, both the fire-resistant layer and the insulating layer are made of flame-retardant ceramicized silicone rubber material.

[0015] The above technical solution enables the cable to operate in high-temperature environments and isolates fire sources.

[0016] As a further preferred embodiment of this technical solution, the outer sheath layer is a flexible sheath made of low-smoke, halogen-free flame-retardant material.

[0017] The above-mentioned technical solutions can reduce the release of harmful gases during a fire and improve fire resistance.

[0018] This utility model provides a flexible mineral-insulated fire-resistant cable with the following advantages:

[0019] (1) This utility model can support and protect the squeezed cable by setting a cross reinforcement plate and an elastic arc plate, preventing the inner sheath layer from being squeezed and deformed, which would damage the inside of the cable. The reinforcement layer and reinforcement wire can increase the strength and avoid damage due to external forces such as stretching and squeezing, further protecting the inner sheath layer and thus extending the service life of the cable.

[0020] (2) This utility model makes the cable easy to install by using a multi-strand fine copper wire stranded conductor and a flexible sheath. The ceramicized silicone rubber material isolation layer enables the cable to work in high-temperature environments and isolates fire sources. The low-smoke halogen-free flame-retardant material outer sheath layer can reduce the release of harmful gases during a fire and improve fire resistance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 3 This is an enlarged view of Figure A of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the cross-shaped reinforcing plate and the elastic arc-shaped plate of this utility model;

[0025] Figure 5 This is a schematic diagram of the reinforcing layer of this utility model;

[0026] In the diagram: 1. Conductor unit; 11. Conductor; 12. Inner insulation layer; 13. Protective layer; 2. Filler layer; 3. Cross-shaped reinforcing plate; 31. Elastic arc plate; 4. Inner sheath layer; 5. Reinforcing layer; 51. Corrugated groove; 52. Reinforcing wire; 6. Outer insulation layer; 7. Fire-resistant layer; 8. Isolation layer; 9. Outer sheath layer. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] This utility model provides a technical solution: such as Figure 1 and Figure 2 As shown in this embodiment, a flexible mineral-insulated fireproof cable includes a conductor unit 1, which includes a conductor 11. The conductor 11 is made of multiple strands of fine copper wire twisted together. An inner insulation layer 12 is provided on the outside of the conductor 11, and a protective layer 13 is provided on the outside of the inner insulation layer 12. The inner insulation layer 12 is made of flexible mineral insulating material. The conductor unit 1 is provided with multiple sets of stranded cable cores. The insulation layer is made of flexible mineral insulating material of mica tape to ensure insulation performance at high temperatures.

[0029] like Figure 4 and Figure 5As shown, a cross-shaped reinforcing plate 3 is provided in the middle of conductor unit 1. The conductor units 1 are separated around the cross-shaped reinforcing plate 3. Elastic arc-shaped plates 31 are fixedly connected around the cross-shaped reinforcing plate 3. A filling layer 2 is provided in the gap between the cable core, the cross-shaped reinforcing plate 3, and the elastic arc-shaped plates 31. An inner sheath layer 4 is provided on the outside of the elastic arc-shaped plates 31. A reinforcing layer 5 is provided on the outside of the inner sheath layer 4. The reinforcing layer 5 is made of metal, such as steel. Corrugated grooves 51 are arranged on the inner and outer sides of the reinforcing layer 5. An outer insulation layer 6 is provided on the outside of the reinforcing layer 5. The outer insulation layer 6 is made of flexible mineral insulating material. A reinforcing wire 52 is installed in the gap between the reinforcing layer 5 and the outer insulation layer 6. The reinforcing wire 52 is installed along the length of the cable. By setting the cross reinforcement plate 3 and the elastic arc plate 31, the compressed cable can be supported and protected, preventing the inner sheath layer 4 from being compressed and deformed, which would damage the inside of the cable. The reinforcing layer 5 and the reinforcing wire 52 can increase the strength and avoid damage due to external forces such as tension and compression, further protecting the inner sheath layer 4, thereby extending the service life of the cable.

[0030] like Figure 1 and Figure 3 As shown, a fire-resistant layer 7 is provided outside the outer insulation layer 6, and an isolation layer 8 is provided outside the fire-resistant layer 7. Both the fire-resistant layer 7 and the isolation layer 8 are made of flame-retardant ceramicized silicone rubber material. An outer sheath layer 9 is provided outside the isolation layer 8. The outer sheath layer 9 is a flexible sheath made of low-smoke halogen-free flame-retardant material. The conductor 11 is stranded with multiple strands of fine copper wire, and the flexible sheath makes the cable easy to install. The ceramicized silicone rubber isolation layer 8 enables the cable to work in high-temperature environments and isolates the fire source. The low-smoke halogen-free flame-retardant outer sheath layer 9 can reduce the release of harmful gases during a fire and improve fire resistance.

[0031] This utility model provides a flexible mineral-insulated fireproof cable. The specific working principle is as follows: a cross-shaped reinforcing plate 3 and an elastic arc plate 31 are set to support and protect the extruded cable; a reinforcing layer 5 and reinforcing wires 52 are set to increase strength; a ceramicized silicone rubber material isolation layer 8 is set to enable the cable to work in high-temperature environments and isolate fire sources; and a low-smoke halogen-free flame-retardant outer sheath layer 9 is set to reduce the release of harmful gases during a fire and improve fire resistance.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible mineral-insulated fire-resistant cable, comprising a conductor unit (1), characterized in that: The conductor unit (1) is provided with multiple sets and twisted together to form a cable core; A cross-shaped reinforcing plate (3) is provided in the middle of the conductor unit (1). The conductor units (1) around the cross-shaped reinforcing plate (3) are separated. An elastic arc plate (31) is fixedly connected around the cross-shaped reinforcing plate (3). A filling layer (2) is provided in the gap between the cable core, the cross-shaped reinforcing plate (3) and the elastic arc plate (31). An inner sheath layer (4) is provided on the outside of the elastic arc plate (31). A reinforcing layer (5) is provided on the outside of the inner sheath layer (4). A wave groove (51) is arranged on the inside and outside of the reinforcing layer (5). An outer insulation layer (6) is provided on the outside of the reinforcing layer (5). The outer insulation layer (6) is made of flexible mineral insulating material. A reinforcing wire (52) is provided in the gap between the reinforcing layer (5) and the outer insulation layer (6). The reinforcing wire (52) is provided along the length of the cable.

2. The flexible mineral-insulated fire-resistant cable according to claim 1, characterized in that: The conductor unit (1) includes a conductor (11), an inner insulation layer (12) is provided on the outside of the conductor (11), and a protective layer (13) is provided on the outside of the inner insulation layer (12). The inner insulation layer (12) is made of flexible mineral insulating material.

3. The flexible mineral-insulated fire-resistant cable according to claim 1, characterized in that: The outer insulation layer (6) is provided with a fire-resistant layer (7) on the outside, and the fire-resistant layer (7) is provided with an isolation layer (8) on the outside.

4. The flexible mineral-insulated fire-resistant cable according to claim 3, characterized in that: An outer sheath layer (9) is provided on the outside of the isolation layer (8).

5. A flexible mineral-insulated fire-resistant cable according to claim 1, characterized in that: The conductor (11) is made of multiple strands of fine copper wire twisted together.

6. A flexible mineral-insulated fire-resistant cable according to claim 3, characterized in that: Both the fire-resistant layer (7) and the isolation layer (8) are made of flame-retardant ceramicized silicone rubber material.

7. A flexible mineral-insulated fire-resistant cable according to claim 4, characterized in that: The outer sheath layer (9) is a flexible sheath made of low-smoke halogen-free flame-retardant material.

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