Breakdown-proof flexible fireproof cable

Abstract

The utility model discloses an anti-breakdown flexible fireproof cable which comprises a cable core. Six mutually twisted wire cores are arranged in the cable core, each wire core is composed of an inner insulating layer and a conductor, and the inner insulating layer wraps the conductor; a composite shielding layer is arranged outside the cable, the composite shielding layer is composed of a shielding base layer, a wrapping layer and an absorption layer, a composite anti-breakdown layer is arranged outside the composite shielding layer, and the composite anti-breakdown layer is composed of a base material layer, a strengthening layer and an outer protection layer. According to the scheme, the problem that the overall anti-breakdown performance of the fireproof cable is gradually reduced in a complex environment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof cables, in particular to a breakdown-proof flexible fireproof cable. Background Art

[0002] Fire-resistant cables are cables designed to prevent the spread of flames within a specified range after the test fire source is removed, even after the sample is burned under specified test conditions. Any residual flames or burns will extinguish themselves within a specified timeframe. While these cables may be damaged and rendered inoperable in a fire, they can prevent the spread of fire, thereby protecting other equipment and minimizing losses. Their basic structure includes insulation, sheath, outer sheath, tape, and filler, all made of flame-retardant materials.

[0003] For example, the Chinese authorized patent "A Fireproof Cable Structure" with announcement number CN215988177U has a cable core, an insulating layer is provided outside the cable core, a fireproof layer formed by filling with fireproof powder is provided outside the insulating layer, an outer sheath is provided outside the fireproof layer, a number of expansion parts are provided inside the fireproof layer, a cavity for filling with compressed inert gas is provided inside the expansion parts, a number of partitions are provided between the insulating layer and the outer sheath, a cavity is formed between two adjacent partitions and the insulating layer and the outer sheath, and the fireproof layer is placed in the cavity in multiple sections.

[0004] Although the above-mentioned existing technology can improve the fire resistance of cables, when used in complex environments, including harsh conditions such as high temperature, humidity, and corrosion, the overall anti-breakdown performance will gradually decrease, thereby affecting its own fire protection effect. Therefore, it does not meet the existing needs. In this regard, we propose a flexible fire-resistant cable that is anti-breakdown. Utility Model Content

[0005] The purpose of the present invention is to provide a flexible fireproof cable that is anti-breakdown, so as to solve the problem in the above background technology that the overall anti-breakdown performance of the fireproof cable will gradually decrease in complex environments.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a flexible fire-proof cable with anti-breakdown, comprising a cable core; six twisted-to-one wire cores are provided inside the cable core, the wire core is composed of an inner insulating layer and a conductor, and the inner insulating layer is wrapped around the outside of the conductor; a composite shielding layer is provided on the outside of the cable core, the composite shielding layer is composed of a shielding base layer, a wrapping layer and an absorption layer, a composite anti-breakdown layer is provided on the outside of the composite shielding layer, and the composite anti-breakdown layer is composed of a base material layer, a reinforcement layer and an outer protective layer.

[0007] Preferably, the conductor is formed by twisting a plurality of thin copper wires, and the inner insulating layer is extruded onto the outside of the conductor.

[0008] Preferably, the shielding base layer is wrapped around the outer wall of the cable core, the wrapping layer is wrapped around the outer wall of the shielding base layer by overlapping multiple layers of metal foil tapes to form a continuous shielding layer, and the absorption layer is fixed to the outer wall of the wrapping layer by adhesive.

[0009] Preferably, a fireproof layer is provided between the composite shielding layer and the composite anti-breakdown layer, and the fireproof layer is adhered and fixed to the composite shielding layer.

[0010] Preferably, the base material layer is fixed on the outer wall of the fireproof layer by extrusion equipment, the reinforcement layer is spirally wound on the outer wall of the base material layer, and the outer protective layer is fixed on the outer wall of the reinforcement layer by extrusion equipment.

[0011] Preferably, the gap between the cable core and the wire core is filled with epoxy resin.

[0012] Preferably, a Caselav reinforcement core is provided at the center of the cable core.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model is provided with a composite anti-breakdown layer and a multi-layer composite anti-breakdown layer structure, and in particular, by adding high-strength and high-insulation materials such as ceramic silicone rubber tape and mica tape, it can significantly improve the anti-breakdown ability of the cable and reduce the risk of failure due to electrical shock and short circuit. The composite anti-breakdown layer not only enhances the electrical insulation performance of the cable, but also improves the overall safety performance of the cable through the wear resistance and corrosion resistance of the outer sheath, and extends the service life of the cable. The composite anti-breakdown layer design of the flexible cable enables it to adapt to various complex installation environments, including high temperature, humidity, corrosion and other harsh conditions, and maintain stable anti-breakdown performance.

[0015] 2. The utility model is provided with a composite shielding layer, which can more effectively block and disperse electromagnetic interference, ensure the stable transmission of the internal signal of the cable, and by reducing the interference of external electromagnetic radiation on the internal signal of the cable, the composite shielding layer can significantly improve the signal quality, reduce the bit error rate and signal attenuation. The wear resistance and corrosion resistance of the absorption layer can protect the inner shielding structure from the influence of the external environment and extend the service life of the cable. The composite shielding layer design of the flexible cable enables it to adapt to various complex installation environments, including bending, torsion and other scenarios, and maintain stable shielding performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 For the utility model Figure 1 A partial enlarged view of area A in the middle;

[0019] Figure 4 This is a schematic diagram of the composite shielding layer structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the composite anti-breakdown layer structure of the present utility model.

[0021] In the figure: 1. Cable core; 2. Wire core; 21. Inner insulation layer; 22. Conductor; 3. Composite shielding layer; 31. Shielding base layer; 32. Wrapping layer; 33. Absorption layer; 4. Fireproof layer; 5. Composite anti-breakdown layer; 51. Base material layer; 52. Reinforcement layer; 53. Outer sheath. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-5 The utility model provides an embodiment: a breakdown-proof flexible fire-proof cable, comprising a cable core 1; six mutually twisted cores 2 are provided inside the cable core 1, the core 2 is composed of an inner insulating layer 21 and a conductor 22, and the inner insulating layer 21 is wrapped around the outside of the conductor 22, the gap between the cable core 1 and the core 2 is filled with epoxy resin, and the cable core 1 is provided with a composite shielding layer 3 on the outside, the composite shielding layer 3 is composed of a shielding base layer 31, a wrapping layer 32 and an absorption layer 33, a composite anti-breakdown layer 5 is provided on the outside of the composite shielding layer 3, the composite anti-breakdown layer 5 is composed of a base material layer 51, a strengthening layer 52 and an outer sheath 53, and a Caselaf strengthening core is provided at the center of the cable core 1.

[0024] The composite anti-breakdown layer 5 can significantly improve the anti-breakdown capability of the cable and reduce the risk of failure due to electrical shock and short circuit. The composite shielding layer 3 can more effectively block and disperse electromagnetic interference, ensuring the stable transmission of internal signals of the cable by reducing the interference of external electromagnetic radiation on the internal signals of the cable.

[0025] See also Figure 3 The conductor 22 is made of multiple fine copper wires twisted together, and the inner insulation layer 21 is extruded on the outside of the conductor 22. The conductor 22 is made of multiple strands of ultra-fine copper wires twisted together to ensure good conductivity and bending flexibility. Fine twisting can reduce resistance and increase current carrying capacity while maintaining good bending characteristics, which is convenient for installation and wiring. The inner insulation layer 21 is a synthetic mica tape, which can maintain stable insulation performance at high temperatures to prevent cable breakdown.

[0026] See also Figure 4The shielding base layer 31 is wrapped around the outer wall of the cable core 1, and the wrapping layer 32 is wrapped around the outer wall of the shielding base layer 31 by overlapping multiple layers of metal foil tapes to form a continuous shielding layer. The absorption layer 33 is fixed to the outer wall of the wrapping layer 32 by adhesive. The shielding base layer 31 is a tinned copper tape with good conductivity and ductility, which can effectively absorb and disperse electromagnetic interference; the wrapping layer 32 is a metal foil tape, which is wrapped by overlapping multiple layers of metal foil tapes to form a continuous shielding layer, thereby improving the shielding effect; the absorption layer 33 is a conductive polymer, which not only has the characteristics of wear resistance and corrosion resistance, but also can absorb electromagnetic waves to a certain extent, protecting the inner layer structure from the influence of the external environment.

[0027] See also Figure 1 and Figure 2 A fireproof layer 4 is provided between the composite shielding layer 3 and the composite anti-breakdown layer 5, and the fireproof layer 4 is adhered and fixed to the composite shielding layer 3. The fireproof layer 4 is ceramic fiber cotton, which has extremely low thermal conductivity and can effectively isolate heat transfer, reduce heat accumulation of the cable in a high temperature environment, and protect the internal structure of the cable and signal transmission from high temperature. At the same time, it has an extremely high fire resistance temperature and can maintain structural stability in an extremely high temperature environment, effectively preventing the cable from burning rapidly in a high temperature fire, and providing long-term fire protection for the cable.

[0028] See also Figure 5 The base material layer 51 is fixed on the outer wall of the fireproof layer 4 by an extrusion device, the reinforcement layer 52 is spirally wound on the outer wall of the base material layer 51, and the outer protective layer 53 is fixed on the outer wall of the reinforcement layer 52 by an extrusion device. The base material layer 51 is ethylene propylene rubber, which has good insulation performance and heat resistance and is suitable for cable insulation in high temperature environments to protect the cable conductor from electrical shock and short circuit; the reinforcement layer 52 is a ceramic silicone rubber belt, which can form a hard ceramic-like protective layer at high temperature to effectively prevent cable breakdown; the outer protective layer 53 is low-smoke halogen-free polyolefin, which does not produce toxic gas when burned, meets environmental protection requirements, and has good wear resistance and corrosion resistance to protect the inner layer structure from the influence of the external environment and further improve the durability of the cable.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A flexible fireproof cable with anti-breakdown function, comprising a cable core (1); characterized in that: The cable core (1) is provided with six mutually twisted cores (2) inside, the cores (2) are composed of an inner insulating layer (21) and a conductor (22), and the inner insulating layer (21) is wrapped around the outside of the conductor (22); the cable core (1) is provided with a composite shielding layer (3) outside, the composite shielding layer (3) is composed of a shielding base layer (31), a wrapping layer (32) and an absorption layer (33); the composite anti-breakdown layer (5) is provided outside the composite shielding layer (3), and the composite anti-breakdown layer (5) is composed of a base material layer (51), a reinforcement layer (52) and an outer sheath (53).

2. The anti-breakdown flexible fireproof cable according to claim 1, characterized in that: The conductor (22) is formed by twisting a plurality of thin copper wires, and the inner insulating layer (21) is extruded onto the outside of the conductor (22).

3. The anti-breakdown flexible fireproof cable according to claim 1, characterized in that: The shielding base layer (31) is wrapped around the outer wall of the cable core (1), the wrapping layer (32) is wrapped around the outer wall of the shielding base layer (31) by overlapping multiple layers of metal foil tapes to form a continuous shielding layer, and the absorption layer (33) is fixed to the outer wall of the wrapping layer (32) by adhesive.

4. The anti-breakdown flexible fireproof cable according to claim 1, characterized in that: A fireproof layer (4) is provided between the composite shielding layer (3) and the composite anti-breakdown layer (5), and the fireproof layer (4) is adhered and fixed to the composite shielding layer (3).

5. The anti-breakdown flexible fireproof cable according to claim 4, characterized in that: The base material layer (51) is fixed on the outer wall of the fireproof layer (4) by means of an extrusion device, the reinforcement layer (52) is spirally wound on the outer wall of the base material layer (51), and the outer protective layer (53) is fixed on the outer wall of the reinforcement layer (52) by means of an extrusion device.

6. The anti-breakdown flexible fireproof cable according to claim 1, characterized in that: The gap between the cable core (1) and the wire core (2) is filled with epoxy resin.

7. The anti-breakdown flexible fireproof cable according to claim 1, characterized in that: A Caselav reinforcement core is provided at the center of the cable core (1).

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