Fireproof cable

Abstract

The utility model provides a fireproof cable. The fireproof cable is characterized in that the fireproof cable comprises an outer sheath arranged on the outermost layer; the lining of the outer sheath is coated with a middle functional layer; the inner side of the middle functional layer is coated with a steel tape armoring layer; the inner side of the steel tape armoring layer is coated with a buffer and isolation layer; the lining coated with the buffer and isolation layer is coated with an aluminum sleeve layer; the inner side of the aluminum sleeve layer is coated with a fire-resistant wrapping tape; a fire-resistant filling layer is coated in the fire-resistant belting; the lining of the fire-resistant filling layer is coated with the isolating layer; the insulating layer is coated inside the isolating layer; and the conductor is coated with the inner side of the insulating layer. A good fireproof effect is achieved in a multi-layer waterproof mode.

Description

Technical Field

[0001] This utility model relates to the field of cables, specifically to a fire-resistant cable. Background Technology

[0002] Against the backdrop of continuous social development and improved living standards, public concern for the safety of everyday products is increasing. As the core of the power system, wires and cables are receiving widespread attention for their safety characteristics. Furthermore, as consumers become more aware of electrical safety, their demands for the quality, reliability, and safety features of wires and cables are also rising. This trend is prompting related industries to continuously innovate and improve their technologies to ensure the stability and reliability of wires and cables in power supply, thereby protecting the safety of people's living and working environments.

[0003] Currently, most fire-resistant cables rely on mica tape to maintain their fire-resistant properties. However, due to limitations in processing technology, the insulation and mechanical properties of mica tape are not ideal. Using it directly as an insulation layer may cause problems, and its safety performance is relatively low. Utility Model Content

[0004] The present invention aims to overcome the above-mentioned defects and provide a waterproof cable with good safety performance.

[0005] This utility model provides a fireproof cable, characterized in that it includes an outer sheath disposed on the outermost layer;

[0006] The inner lining of the aforementioned outer sheath is covered with an intermediate functional layer;

[0007] The inner lining of the aforementioned intermediate functional layer is covered with a steel belt armor layer;

[0008] The inner lining of the aforementioned steel belt armor layer is covered with a buffer and isolation layer;

[0009] The inner lining of the aforementioned buffer and isolation layers is covered with an aluminum sleeve layer;

[0010] The inner lining of the aforementioned aluminum sheath is covered with fire-resistant tape;

[0011] The inner lining of the aforementioned fire-resistant wrapping is covered with a fire-resistant filling layer;

[0012] The aforementioned refractory filling layer is internally covered with an insulating layer;

[0013] The inner layer of the aforementioned isolation layer is covered with an insulating layer;

[0014] The conductor is encased inside the aforementioned insulating layer.

[0015] Furthermore, the fireproof cable provided by this utility model is characterized in that: the outer sheath is made of flame-retardant cross-linked polyolefin material with a polytetrafluoroethylene coating.

[0016] Furthermore, the fire-resistant cable provided by this utility model is further characterized in that: the aforementioned intermediate functional layer prevents the steel tape armor layer from damaging the outer sheath and has a fire-retardant effect. Furthermore, the fire-resistant cable provided by this utility model is further characterized in that:

[0017] The aforementioned intermediate functional layer is ceramicized silicone.

[0018] Furthermore, the fireproof cable provided by this utility model is characterized in that: the above-mentioned buffer and isolation layers are made of elastic material.

[0019] Furthermore, the fireproof cable provided by this utility model is characterized in that: the aforementioned aluminum sheath shields the signal and is waterproof, fireproof, and resistant to mechanical forces.

[0020] Furthermore, the fire-resistant cable provided by this utility model is further characterized in that:

[0021] The aforementioned refractory strapping is a composite F4 material.

[0022] Furthermore, the fireproof cable provided by this utility model is characterized in that: the fire-resistant filling layer is an inorganic mineral-based silicone material in a putty state.

[0023] Furthermore, the fire-resistant cable provided by this utility model is further characterized in that:

[0024] The aforementioned isolation sleeve is made of modified high-density polyethylene.

[0025] Furthermore, the fireproof cable provided by this utility model is characterized in that: the above-mentioned insulation layer is made of irradiated cross-linked polyethylene and flame-retardant irradiated cross-linked polyolefin composite material. Attached Figure Description

[0026] Figure 1 This embodiment provides a structural schematic diagram of a fire-resistant cable; Detailed Implementation

[0027] This invention can be implemented in many ways and has various embodiments, therefore specific embodiments are illustrated and described in the accompanying drawings. However, this is not intended to limit the invention to specific implementations, but should be understood to include all modifications, equivalents, and even substitutions that fall within the spirit and technical scope of this invention.

[0028] like Figure 1 As shown, this embodiment provides a fire-resistant cable, comprising:

[0029] The outermost sheath 1 is made of flame-retardant cross-linked polyolefin material with a polytetrafluoroethylene coating. It has high temperature resistance and flame-retardant properties, effectively preventing the spread of flames and reducing the risk of fire. In addition, the coating makes the cable surface smooth, reduces the coefficient of friction, and makes it easier to lay and protect the cable core.

[0030] There is a ceramicized silicone 2 (i.e., intermediate functional layer) between the outer sheath 1 and the steel strip armor layer 3. The purpose of setting 2 is to prevent the outer sheath 1 from directly contacting the steel strip 3 and to prevent the outer sheath from being damaged by the pressure of the steel strip seam due to its own weight during installation. On the other hand, the silicone material can be cured when exposed to fire to achieve the purpose of fire resistance.

[0031] The steel belt armor layer 3 protects the internal structure and also serves as a fire-resistant layer. Its good heat dissipation also helps it resist fire when exposed to fire.

[0032] The inner lining layer 4 is made of an elastomer material, which serves as a buffer and isolation between the armor layer 3 and the aluminum sheath 5. In addition, the properties of the elastomer make the cable more flexible.

[0033] The aluminum sheath 5 is made of aluminum alloy, and its excellent shielding performance prevents the cable from being interfered with by external signals during use. It is also waterproof and fireproof, and together with the armor layer, it forms a barrier against mechanical forces.

[0034] The fire-resistant wrapping tape 6 is used to cover the fire-resistant filler layer 7. Its material is composite F4 tape, which is flame-retardant and high-temperature resistant.

[0035] The fire-resistant filler layer 7 is made of inorganic mineral-based silicone material. This material is normally in a putty-like state, filling and smoothing the gaps in the cable. It has excellent insulation properties and outstanding fire resistance. After being exposed to fire, it gradually hardens after about 2 hours, adhering between the wire cores to further prevent flame erosion.

[0036] The isolation sleeve 8 is made to fit the insulated wire core using a special mold. The material is modified high-density polyethylene, which has excellent waterproof performance.

[0037] Insulation layer 9 is made of irradiated cross-linked polyethylene and flame-retardant irradiated cross-linked polyolefin composite material, manufactured through a double-layer co-extrusion technology. This approach fully utilizes the high insulation properties of cross-linked polyethylene and the high flame-retardant properties of cross-linked polyolefin. After gamma ray irradiation, the two materials achieve a working temperature of 150℃. This high working temperature translates to high current carrying capacity and temperature resistance rating, and the material also exhibits superior mechanical strength, which is unmatched by fire-resistant mica tape.

[0038] Furthermore, under fire conditions, the combustible material in the flame-retardant irradiated polyolefin material vaporizes, and the material eventually forms a honeycomb-like solidified material surrounding the conductor 10, achieving dual insulation from both air and the solidified material. This allows the cable to maintain power for an extended period even under fire conditions. Tests have shown that at normal operating temperature (90℃), the volume resistivity of the cable insulation is greater than 1.0 × 10⁻⁶.15 Ω·cm, and even under fire conditions, it reaches no less than 1.0×10. 8 The horizontal strength of the double insulation layer is Ω·cm; the tensile strength is not less than 9.0 N / mm². 2 The elongation at break is not less than 150%. Therefore, double insulation maintains good electrical and mechanical properties at room temperature and also maintains good insulation properties under fire conditions.

[0039] The function and effect of this embodiment:

[0040] This embodiment effectively prevents flame spread and ensures the cable functions normally under fire conditions by using multiple layers of flame-retardant materials. The use of high-temperature-resistant materials increases the cable's operating temperature and current carrying capacity, extending its service life. Materials with good shielding and waterproof properties protect the cable from external signal interference and moisture corrosion, improving its reliability. The use of elastomer and coating materials increases the cable's flexibility and surface smoothness, facilitating cable laying and maintenance. This optimized combination of materials provides new means and methods for achieving fire resistance and improves the product's electrical performance under normal use and fire conditions.

[0041] While the foregoing description has focused on embodiments, these are merely illustrative and do not limit the scope of the invention. Those skilled in the art will understand that various modifications and applications not illustrated above can be made without departing from the essential characteristics of the embodiments. For example, the constituent elements specifically shown in the embodiments can be implemented through modifications. Furthermore, various differences related to such modifications and applications should be interpreted as including within the scope of the invention as defined in the appended claims.

Claims

1. A fire-resistant cable, characterized in that: Including the outermost protective sleeve; The inner lining of the outer sheath covers the intermediate functional layer; The inner lining of the intermediate functional layer is covered with a steel strip armor layer; The inner lining of the steel strip armor layer is covered with a buffer and isolation layer; The inner lining of the buffer and isolation layer is covered with an aluminum sleeve layer; The inner lining of the aluminum sleeve is covered with a fire-resistant wrapping tape; The inner lining of the fire-resistant wrapping is covered with a fire-resistant filling layer; The inner layer of the refractory filling layer is covered with an isolation layer; The inner lining of the isolation layer is covered with an insulating layer; The conductor is encased inside the insulating layer.

2. The fire-resistant cable as described in claim 1, characterized in that: The outer sheath is made of flame-retardant cross-linked polyolefin material with a polytetrafluoroethylene coating.

3. The fire-resistant cable as described in claim 1, characterized in that: The intermediate functional layer prevents the steel strip armor layer from damaging the outer sheath and also has a fire-retardant effect.

4. A fire-resistant cable as described in claim 1, characterized in that: The intermediate functional layer is ceramicized silicone.

5. A fire-resistant cable as described in claim 1, characterized in that: The buffer and isolation layers are made of elastic material.

6. A fire-resistant cable as described in claim 1, characterized in that: The aluminum sheath shields the signal and is waterproof, fireproof, and resistant to mechanical forces.

7. A fire-resistant cable as described in claim 1, characterized in that: The refractory tape is a composite F4 tape.

8. A fire-resistant cable as described in claim 1, characterized in that: The refractory filler layer is an inorganic mineral-based silica gel material in a putty state.

9. A fire-resistant cable as described in claim 1, characterized in that: The isolation layer is made of modified high-density polyethylene.

10. A fire-resistant cable as described in claim 1, characterized in that: The insulation layer is made of a composite material of irradiated cross-linked polyethylene and flame-retardant irradiated cross-linked polyolefin.

Images