Cable with insulating fireproof properties

Abstract

This utility model discloses a cable with insulating and fire-resistant properties, comprising several conductors, each covered with a cross-linked polyethylene layer. Multiple ceramic rings are arranged along the extension direction of each cross-linked polyethylene layer. Both the cross-linked polyethylene and the ceramic rings are covered with a silicone rubber layer. An outer fire-resistant mica tape is disposed outside the silicone rubber layer, and a PVC outer layer is disposed outside the fire-resistant mica tape. This utility model has the following advantages and effects: by filling the ceramic rings with silicone rubber, the ceramic rings can slow down the axial spread of fire when the cable is subjected to fire, solving the problem that traditional cables easily accelerate the spread of flames in a fire.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to cables with insulating and fire-resistant properties. Background Technology

[0002] A cable is a device for transmitting electrical energy or signals, typically composed of several or groups of conductors. Each group of conductors is insulated from each other and is often twisted around a central conductor, with the entire cable covered by a highly insulating outer layer. Cables are characterized by being internally energized and externally insulated.

[0003] In modern society, electrical fires account for 30% of building fires, making the fire-resistant insulation performance of cables increasingly important. Fire-resistant insulated cables are a vital line of defense for the safe operation of modern cities. Although existing cables utilize high-insulation, high-fire-resistant materials, flames can still spread along the cables during a fire. Utility Model Content

[0004] The purpose of this invention is to provide a cable with insulating and fire-resistant properties.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a cable with insulating and fireproof properties, comprising a plurality of conductors, each conductor being covered with a cross-linked polyethylene layer, and a plurality of ceramic rings being provided outside the plurality of cross-linked polyethylene layers along their extension direction, the cross-linked polyethylene and the ceramic rings being covered with a silicone rubber layer, a fire-resistant mica tape being provided outside the silicone rubber layer, and a PVC outer layer being provided outside the fire-resistant mica tape.

[0006] The ceramic ring is further configured to have a radius of 6cm, an outer wall thickness of 2-3mm, and a wall width of 2cm.

[0007] A further setting is made: the ceramic ring is embedded 2 mm inside the cross-linked polyethylene layer.

[0008] The further configuration is as follows: the outer side of the silicone rubber layer extends 1 mm above the ceramic ring.

[0009] A further configuration is provided: flame-retardant filler particles are disposed within the silicone rubber layer.

[0010] The ceramic ring is further configured such that: the ceramic ring includes two semi-rings, one end of which is provided with a cut and the other end with an extension, and the extension of the semi-ring is inserted into the cut.

[0011] The configuration is further defined as follows: several cross-linked polyethylene layers are covered with an inner layer of fire-resistant mica tape, the inner layers of fire-resistant mica tape are spaced apart, and the inner layers of fire-resistant mica tape are provided with multiple perforations.

[0012] In summary, this utility model has the following beneficial effects: by filling the ceramic ring with silicone rubber, the ceramic ring can slow down the spread of fire in the axial direction when the cable is subjected to fire erosion, thus solving the problem that traditional cables are prone to accelerating the spread of flames in a fire. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the cross-sectional structure of the cable;

[0014] Figure 2 for Figure 1 Enlarged view of section AA;

[0015] Figure 3 This is a schematic diagram of a semi-ring structure.

[0016] In the diagram: 1. Conductor; 2. Cross-linked polyethylene layer; 3. Ceramic ring; 4. Silicone rubber layer; 5. Outer fire-resistant mica tape; 6. PVC outer layer; 7. Flame-retardant filler particles; 8. Semi-ring; 9. Cutting end; 10. Extension opening; 11. Inner fire-resistant mica tape; 12. Perforation. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] The cable has fire-resistant insulation properties and includes three conductors 1, which are made of copper.

[0019] Each conductor 1 is covered with a cross-linked polyethylene layer 2. Three cross-linked polyethylene layers 2 with conductors 1 are arranged in parallel, and multiple ceramic rings 3 are sleeved along their extension direction. There are gaps between the ceramic rings 3. The cross-sections of the three cross-linked polyethylene layers 2 are triangularly distributed. The radius of the ceramic rings 3 is 6cm, the outer wall thickness is 2-3mm, and the wall width is 2cm.

[0020] To ensure the stability of the triangular distribution among the three cross-linked polyethylene layers 2, an inner layer of refractory mica tape is wound around the three cross-linked polyethylene layers 2. The inner refractory mica tapes are spaced apart and have multiple perforations 12. A ceramic ring 3 is positioned outside the inner refractory mica tape and is embedded 2 mm into the cross-linked polyethylene layer 2. The ceramic ring 3 includes two semi-rings 8, each with a cutout 9 at one end and an extension 10 at the other end. The extensions 10 of the semi-rings 8 are inserted into the cutouts 9.

[0021] Then, through an extrusion process, the cross-linked polyethylene layer 2 with the ceramic ring 3 is placed into an extruder, so that the cross-linked polyethylene and the ceramic ring 3 are covered with a silicone rubber layer 4. The silicone rubber layer 4 contains flame-retardant filler particles 7, which can be traditional materials such as aluminum hydroxide.

[0022] A fire-resistant mica tape is provided outside the silicone rubber layer 4, and a PVC outer layer 6 is provided outside the fire-resistant mica tape through an extrusion process.

[0023] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. Cable with insulating fireproof properties, characterized in that: The conductor is coated with a cross-linked polyethylene layer, and the cross-linked polyethylene layer is provided with a plurality of ceramic ring sleeves along the extension direction thereof.

2. The cable having an insulating fireproofing performance according to claim 1, characterized by: The radius of the ceramic ring sleeve is 6 cm, the outer wall thickness is 2-3 mm, and the layer wall width is 2 cm.

3. The cable having an insulating fireproofing performance according to claim 1, characterized by: The ceramic ring sleeve is embedded in the cross-linked polyethylene layer by 2 mm.

4. The cable having an insulating fireproofing performance according to claim 1, characterized by: The outer side of the silicone rubber layer is 1 mm higher than the ceramic ring sleeve.

5. The cable having an insulating fireproofing performance according to claim 1, characterized by: The silicone rubber layer is provided with flame-retardant filler particles.

6. The cable having an insulating fireproofing performance according to claim 1, characterized by: The ceramic ring sleeve comprises left and right two half rings, one end of the half ring is provided with a cutting port, and the other end is provided with an extension port.

7. The cable having an insulating fireproofing performance according to claim 1, characterized by: The cross-linked polyethylene layer is coated with an inner layer of fire-resistant mica tape, and the inner layer of fire-resistant mica tape has a spacing therebetween and is provided with a plurality of perforations.

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