Flexible mineral insulation isolation type fireproof cable

Abstract

The invention discloses a flexible mineral insulation isolation type fireproof cable, which comprises a plurality of groups of conductor units, and the conductor units are twisted into a cable core; the extruded cable can be supported and protected by arranging the cross-shaped reinforcing plates and the elastic arc-shaped plates, damage to the interior of the cable caused by extrusion deformation of the inner sheath layer is prevented, the strength can be enhanced by arranging the reinforcing layer and reinforcing wires, damage caused by external force 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] The present invention relates to the technical field of cables, and particularly to a flexible mineral insulated and isolated fireproof cable. Background Art

[0002] The insulation performance of traditional fireproof cables deteriorates in high-temperature environments, easily leading to short circuits or fires. Although some existing mineral insulated cables have relatively ideal fireproof performance, they lack flexibility. Therefore, a flexible fireproof cable is needed.

[0003] In the prior art, the publication number CN216119649U is proposed. The technical solution disclosed in this patent document is as follows: An isolated mineral insulated corrugated copper sheath flexible fireproof cable, which relates to the technical field of flexible fireproof cables, includes a positioning tube. An anti-pressure frame is installed on the outer surface of the positioning tube, a filler is installed inside the anti-pressure frame, a metal conductor is installed inside the filler, a wrapping layer is installed on the outer surface of the metal conductor, an insulating layer is installed on the outer surface of the wrapping layer, a protective layer is installed on the outer surface of the anti-pressure frame, and a fireproof lining layer is installed on the outer surface of the protective layer.

[0004] The above technical solution provides tensile and compressive protection for the cable by setting an inner copper sheath and an anti-pressure frame on the cable, but the buffering effect is average, resulting in deformation of the cable and internal damage to the cable, affecting the performance of the cable. Summary of the Invention

[0005] The purpose of the present invention is to provide a flexible mineral insulated and isolated fireproof cable to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A flexible mineral insulated and isolated fireproof cable includes a conductor unit. Multiple groups of the conductor units are twisted and stranded into a cable core.

[0007] A cross-shaped reinforcement plate is arranged in the middle of the conductor unit, separating the conductor units around the cross-shaped reinforcement plate. Elastic arc-shaped plates are fixedly connected to the four sides of the cross-shaped reinforcement plate. A filling layer is provided in the gaps among the cable core, the cross-shaped reinforcement plate, and the elastic arc-shaped plates. An inner sheath layer is arranged outside the elastic arc-shaped plates. A reinforcing layer is arranged outside the inner sheath layer. Wave-shaped grooves are arranged in a staggered manner on the inner and outer sides of the reinforcing layer. An outer insulating layer is arranged outside the reinforcing layer. The outer insulating layer is made of a flexible mineral insulating material. Reinforcing wires are arranged in the gaps between the reinforcing layer and the outer insulating layer. The reinforcing wires are arranged along the length of the cable.

[0008] In the above technical solution, the cross reinforcing plate and the elastic arc plate are provided to support and protect the extruded cable, prevent the inner sheath layer from being extruded and deformed, and damage the inside of the cable. The provided reinforcing layer and reinforcing wires can increase the strength, avoid being damaged by external forces such as stretching and extrusion, and further protect the inner sheath layer, thereby 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 outside the conductor, a protective layer is provided outside 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 outside the outer insulating layer, and an isolation layer is provided outside the fire-resistant layer.

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

[0012] In the above technical solution, by stranding the conductor with multiple fine copper wires and using a flexible sheath, the cable is easy to install.

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

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

[0015] In the above technical solution, the cable can work in a high-temperature environment and isolate the fire source.

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

[0017] In the above technical solution, it can reduce the release of harmful gases during a fire and improve the fire protection performance.

[0018] The present invention provides a flexible mineral insulation isolation type fire-resistant cable, which has the following beneficial effects: (1) In the present invention, by providing a cross reinforcing plate and an elastic arc plate, the extruded cable can be supported and protected, preventing the inner sheath layer from being extruded and deformed and damaging the inside of the cable. The provided reinforcing layer and reinforcing wires can increase the strength, avoid being damaged by external forces such as stretching and extrusion, and further protect the inner sheath layer, thereby extending the service life of the cable.

[0019] (2) In the present invention, through the multi-strand fine copper wire stranded conductor and the flexible sheath, the cable is easy to install. The provided isolation layer made of ceramized silicone rubber material enables the cable to work in a high-temperature environment and isolate the fire source. The provided outer sheath layer made of low-smoke and halogen-free flame-retardant material can reduce the release of harmful gases during a fire and improve the fire protection performance. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the whole of the present invention; Figure 3 is an enlarged view of FIG. A of the present invention; Figure 4 is a schematic structural diagram of the cross-shaped reinforcement plate and the elastic arc-shaped plate of the present invention; Figure 5 is a schematic structural diagram of the reinforcement layer of the present invention; In the figure: 1. Conductor unit; 11. Conductor; 12. Inner insulation layer; 13. Protective layer; 2. Filling layer; 3. Cross-shaped reinforcement plate; 31. Elastic arc-shaped plate; 4. Inner sheath layer; 5. Reinforcement layer; 51. Wave groove; 52. Reinforcement wire; 6. Outer insulation layer; 7. Fire-resistant layer; 8. Isolation layer; 9. Outer sheath layer. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention.

[0022] The present invention provides a technical solution: As Figure 1 and Figure 2 shown, in this embodiment, a flexible mineral insulated and isolated fire-resistant cable includes a conductor unit 1. The conductor unit 1 includes a conductor 11, and the conductor 11 is formed by stranding multi-strand fine copper wires. An inner insulation layer 12 is provided outside the conductor 11, and a protective layer 13 is provided outside the inner insulation layer 12. The inner insulation layer 12 is made of a flexible mineral insulation material. Multiple groups of conductor units 1 are stranded to form a cable core, and the insulation layer is made of a flexible mineral insulation material of mica tape to ensure the insulation performance at high temperatures.

[0023] As Figure 4 and Figure 5 ​As shown in the figure, a cross-shaped reinforcement plate 3 is provided in the middle of the conductor unit 1. The conductor unit 1 around the cross-shaped reinforcement plate 3 is separated. Elastic arc-shaped plates 31 are fixedly connected to the periphery of the cross-shaped reinforcement plate 3. A filling layer 2 is provided in the gap between the cable core, the cross-shaped reinforcement plate 3 and the elastic arc-shaped plates 31. An inner sheath layer 4 is provided outside the elastic arc-shaped plates 31. A strengthening layer 5 is provided outside the inner sheath layer 4. The strengthening layer 5 is made of a metal material, such as steel. Wave-shaped grooves 51 are arranged in rows on the inner and outer sides of the strengthening layer 5. An outer insulation layer 6 is provided outside the strengthening layer 5. The outer insulation layer 6 is made of a flexible mineral insulation material. A strengthening wire 52 is arranged in the gap between the strengthening layer 5 and the outer insulation layer 6. The strengthening wire 52 is arranged along the length of the cable. By providing the cross-shaped reinforcement plate 3 and the elastic arc-shaped plates 31, the extruded cable can be supported and protected, preventing the inner sheath layer 4 from being extruded and deformed and damaging the inside of the cable. The provided strengthening layer 5 and strengthening wire 52 can increase the strength, avoid being damaged by external forces such as stretching and extrusion, and further protect the inner sheath layer 4, thereby extending the service life of the cable.

[0024] As Figure 1 and Figure 3 As shown in the figure, a fire-resistant layer 7 is provided outside the outer insulation layer 6. 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 a flame-retardant ceramized silicone rubber material. An outer sheath layer 9 is provided outside the isolation layer 8. The outer sheath layer 9 is a flexible sheath and is made of a low-smoke and halogen-free flame-retardant material. By using a stranded conductor 11 composed of multiple thin copper wires and a flexible sheath, the cable is easy to install. The provided isolation layer 8 made of a ceramized silicone rubber material enables the cable to work in a high-temperature environment and isolate the fire source. The provided outer sheath layer 9 made of a low-smoke and halogen-free flame-retardant material can reduce the release of harmful gases during a fire and improve the fire prevention performance.

[0025] The present invention provides a flexible mineral insulation isolation type fireproof cable. The specific working principle is as follows: The cross-shaped reinforcement plate 3 and the elastic arc-shaped plates 31 are provided to support and protect the extruded cable. The provided strengthening layer 5 and strengthening wire 52 can increase the strength. The provided isolation layer 8 made of a ceramized silicone rubber material enables the cable to work in a high-temperature environment and isolate the fire source. The provided outer sheath layer 9 made of a low-smoke and halogen-free flame-retardant material reduces the release of harmful gases during a fire and improves the fire prevention performance.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible mineral insulated fireproof cable, comprising a conductor unit (1), characterized in that: The conductor units (1) are arranged in multiple groups and twisted into a cable core; A cross reinforcement plate (3) is provided in the middle of the conductor unit (1), the conductor units (1) around the cross reinforcement plate (3) are separated, elastic arc plates (31) are fixedly connected around the cross reinforcement plate (3), a filling layer (2) is provided in the gap between the cable core, the cross reinforcement plate (3) and the elastic arc plate (31), an inner sheath layer (4) is provided on the outer side of the elastic arc plate (31), a reinforcement layer (5) is provided on the outer side of the inner sheath layer (4), wave grooves (51) are arranged on the inner and outer sides of the reinforcement layer (5), an outer insulating layer (6) is provided on the outer side of the reinforcement layer (5), the outer insulating layer (6) is made of a flexible mineral insulating material, and a reinforcing wire (52) is provided in the gap between the reinforcing layer (5) and the outer insulating layer (6), and the reinforcing wire (52) is provided along the length of the cable.

2. A flexible mineral insulated fireproof cable according to claim 1, characterized in that: The conductor unit (1) comprises a conductor (11), an inner insulating layer (12) is provided on the outer side of the conductor (11), a protective layer (13) is provided on the outer side of the inner insulating layer (12), and the inner insulating layer (12) is made of a flexible mineral insulating material.

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

4. A flexible mineral insulated isolated fireproof cable according to claim 3, characterized in that: An outer sheath layer (9) is provided on the outer side of the isolation layer (8).

5. A flexible mineral insulated isolated fireproof cable according to claim 1, characterized in that: The conductor (11) is formed by twisting a plurality of thin copper wires.

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

7. A flexible mineral insulated fireproof 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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