CN220138002U - Fireproof power cable with crosslinked polyethylene sheath - Google Patents

Abstract

The utility model discloses a crosslinked polyethylene sheath fire-resistant power cable, which comprises a cable core, wherein the cable core comprises a plurality of insulating wire cores, fire-retardant filling mud and a central reinforcing core, the central reinforcing core is arranged at the central position of the plurality of insulating wire cores, the fire-retardant filling mud is arranged at the gaps of the plurality of insulating wire cores, a low-smoke halogen-free fire-retardant wrapping tape is wrapped at the outer side of the cable core, a copper wire shielding layer is arranged at the outer side of the low-smoke halogen-free fire-retardant wrapping tape, a fire-resistant fire-retardant layer is arranged at the outer side of the copper wire shielding layer, a ceramic oxygen-isolating layer is arranged at the outer side of the fire-resistant fire-retardant layer, a corrosion-resistant layer is arranged at the outer side of the ceramic oxygen-isolating layer, the crosslinked polyethylene sheath is arranged at the outer side of the corrosion-resistant layer, the cable is provided with multiple protection, the corrosion-resistant layer can provide corrosion resistance for the cable, the ceramic mud cured by heating is used as the ceramic oxygen-isolating layer, the cable has good crusting effect, provides high-temperature resistance performance, and the fire-resistant layer adopts halogen-free fire-resistant silicon to encounter with good self-resistance, and good fire resistance performance.

Description

Fireproof power cable with crosslinked polyethylene sheath

Technical Field

The utility model relates to the related field of power cables, in particular to a crosslinked polyethylene sheath fire-resistant power cable.

Background

The power cable is used for transmitting and distributing electric energy, the circuit comprises a main road and branch roads, and the main road is provided with an urban underground power grid, an outgoing line of a power station, an internal power supply of an industrial and mining enterprise, an underwater power transmission line crossing the river and the sea and the like. In the basic life of people is guaranteed in the function of conveying electric energy, the power cable plays an important role. In particular, special requirements are imposed on the performance of the cable in special cases, such as in power stations and rail traffic, and high requirements are imposed on the fire-resistant and flame-retardant capabilities of the cable.

In the technical field of the existing cable, the outer jackets made of different materials are generally adopted for carrying out fire-resistant, wear-resistant and protection on the cable, the fire-resistant and fire-resistant means are single under special requirements, and the special requirements cannot be met, so that the fire-resistant power cable with the crosslinked polyethylene jacket is provided

Disclosure of Invention

The utility model aims to provide a crosslinked polyethylene sheath fire-resistant power cable which solves the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a fire-resistant power cable of crosslinked polyethylene sheath, includes the cable core, the cable core includes many insulation core, fire-retardant filler mud and central enhancement core, many insulation core's central point puts and is provided with central enhancement core, many insulation core's clearance department is provided with fire-retardant filler mud, the cable core outside is around the package has the fire-retardant band of low smoke and zero halogen, the fire-retardant band outside of low smoke and zero halogen is provided with the copper wire shielding layer, the copper wire shielding layer outside is provided with fire-resistant fire-retardant layer, the fire-resistant fire-retardant layer outside is provided with ceramic and separates oxygen layer, ceramic separates oxygen layer outside and is provided with corrosion-resistant layer, the corrosion-resistant layer outside is provided with crosslinked polyethylene sheath.

In a further embodiment, the insulated wire core comprises a conductor, a polyolefin insulation layer wrapped around the outside of the conductor, and a mica tape outside of the insulation layer.

In a further embodiment, the central reinforcing core material is silicon carbide.

In a further embodiment, the fire-resistant and flame-retardant layer is made of halogen-free flame-retardant silicone rubber.

In a further embodiment, the ceramic oxygen barrier layer is a ceramic paste that is cured by heat.

In a further embodiment, the corrosion resistant layer is made of ethylene propylene diene monomer.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model is provided with multiple protections, the crosslinked polyethylene outer sheath can provide excellent fire resistance, the corrosion-resistant layer of the inner ethylene propylene diene monomer rubber material can provide corrosion resistance, corrosion resistance and wear resistance, the ceramic mud solidified by heating is used as a ceramic oxygen-insulating layer, the ceramic mud has good crusting effect, good shock resistance and spray resistance after being hardened at high temperature, good high temperature resistance and flame retardance are achieved, the high temperature resistance and waterproof performance of the cable can be achieved, the inner layer is provided with halogen-free flame retardant silicone rubber as a fire-resistant flame retardant layer, and the halogen-free flame retardant silicone rubber is formed by vulcanizing a composition taking methyl vinyl silicone rubber as a base rubber with a vulcanizing machine, and has good self-extinguishing property when encountering flame.

Drawings

FIG. 1 is a cross-sectional view of the present utility model;

FIG. 2 is an overall view of the present utility model;

fig. 3 is a cross-sectional view of an insulated wire core of the present utility model.

In the figure: 1. an insulated wire core; 2. flame retardant filler mud; 3. a central reinforcing core; 4. a cable core; 5. low smoke halogen-free flame-retardant belting; 6. a copper wire shielding layer; 7. a fire resistant flame retardant layer; 8. a ceramic oxygen barrier layer; 9. a corrosion resistant layer; 10. a crosslinked polyethylene sheath; 11. a conductor; 12. a polyolefin insulating layer; 13. mica tape.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, an embodiment of the present utility model is provided: the utility model provides a fire-resistant power cable of crosslinked polyethylene sheath, including cable core 4, cable core 4 includes many insulation core 1, fire-retardant filling mud 2 and central enhancement core 3, the central point of many insulation core 1 puts and is provided with central enhancement core 3, the clearance department of many insulation core 1 is provided with fire-retardant filling mud 2, cable core 4 outside is around the package has the fire-retardant band 5 of low smoke and zero halogen, the fire-retardant band 5 outside of low smoke and zero halogen is provided with copper wire shielding layer 6, the copper wire shielding layer 6 outside is provided with fire-resistant fire-retardant layer 7, fire-resistant fire-retardant layer 7 outside is provided with ceramic oxygen barrier layer 8, the ceramic oxygen barrier layer 8 outside is provided with corrosion-resistant layer 9, the corrosion-resistant layer 9 outside is provided with crosslinked polyethylene sheath 10.

Further, the insulated wire core 1 includes a conductor 11, a polyolefin insulation layer 12 wrapped around the outside of the conductor 11, and a mica tape 13 wrapped around the outside of the insulation layer.

Further, the central reinforcing core 3 is made of silicon carbide.

Further, the material of the fireproof flame-retardant layer 7 is halogen-free flame-retardant silicone rubber, the halogen-free flame-retardant silicone rubber is formed by vulcanizing a composition taking methyl vinyl silicone rubber as a base rubber and a vulcanizing machine, and the flame-retardant silicone rubber has good self-extinguishing property when meeting flame.

Further, the ceramic oxygen-insulating layer 8 is ceramic mud solidified by heating, has good crusting effect, has good anti-seismic and anti-spraying capabilities after being hardened at high temperature, has good high-temperature resistance and flame retardance, and can achieve high-temperature resistance and waterproof performance of the cable.

Further, the corrosion-resistant layer 9 is made of ethylene propylene diene monomer rubber, so that corrosion resistance, corrosion resistance and wear resistance can be provided for the ethylene propylene diene monomer rubber.

Working principle: the utility model provides a fire-resistant power cable of crosslinked polyethylene sheath, including cable core 4, cable core 4 includes many insulation core 1, fire-retardant filler mud 2 and central enhancement core 3, the central point of many insulation core 1 puts and is provided with central enhancement core 3, the clearance department of many insulation core 1 is provided with fire-retardant filler mud 2, the cable core 4 outside is lapped and is had low smoke and zero halogen fire-retardant band 5, the fire-retardant band 5 outside of low smoke and zero halogen is provided with copper wire shielding layer 6, copper wire shielding layer 6 outside is provided with fire-resistant fire-retardant layer 7, fire-resistant fire-retardant layer 7 outside is provided with ceramic oxygen barrier layer 8, ceramic oxygen barrier layer 8 outside is provided with corrosion-resistant layer 9, corrosion-resistant layer 9 outside is provided with crosslinked polyethylene sheath 10, when the cable main part outside receives the damage, firstly, crosslinked polyethylene sheath 10 can carry out essential fire-retardant wear-resistant protection to it, after damage, the corrosion-resistant layer of the inner-layer ethylene propylene diene monomer rubber can provide corrosion resistance, corrosion resistance and wear resistance, the ceramic mud cured by heating is used as the ceramic oxygen-insulating layer 8, the ceramic oxygen-insulating layer has good crusting effect, good shock resistance and spray resistance after being hardened at high temperature, good high temperature resistance and flame retardant property, the high temperature resistance and water resistance of the cable can be achieved, the flame-resistant flame-retardant layer 7 of the halogen-free flame-retardant silicone rubber is formed by vulcanizing a composition taking methyl vinyl silicone rubber as a base rubber and a vulcanizing machine, the halogen-free flame-retardant silicone rubber has good self-extinguishing property when encountering flame, the flame-retardant filling mud with gaps between the low smoke halogen-free flame-retardant wrapping tape 5 and the insulating wire core 1 provides excellent flame retardant property for conductors, and the flame-retardant filling mud can be suitable for operation under special environments.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. A crosslinked polyethylene jacketed fire resistant power cable comprising a cable core (4), characterized in that: the cable core (4) comprises a plurality of insulating wire cores (1), flame-retardant filling mud (2) and a central reinforcing core (3), wherein the central reinforcing core (3) is arranged at the central position of each insulating wire core (1), the flame-retardant filling mud (2) is arranged at the clearance of each insulating wire core (1), the low-smoke halogen-free flame-retardant wrapping tape (5) is wrapped outside each cable core (4), a copper wire shielding layer (6) is arranged outside each low-smoke halogen-free flame-retardant wrapping tape (5), a flame-retardant layer (7) is arranged outside each copper wire shielding layer (6), a ceramic oxygen-isolating layer (8) is arranged outside each flame-retardant layer (7), and a corrosion-resistant layer (9) is arranged outside each ceramic oxygen-isolating layer (8), and a crosslinked polyethylene sheath (10) is arranged outside each corrosion-resistant layer (9).

2. A crosslinked polyethylene jacketed fire resistant power cable as in claim 1, wherein: the insulated wire core (1) comprises a conductor (11), a polyolefin insulating layer (12) wrapped on the outer side of the conductor (11) and a mica tape (13) on the outer side of the insulating layer.

3. A crosslinked polyethylene jacketed fire resistant power cable as in claim 1, wherein: the central reinforcing core (3) is made of silicon carbide.

4. A crosslinked polyethylene jacketed fire resistant power cable as in claim 1, wherein: the fireproof flame-retardant layer (7) is made of halogen-free flame-retardant silicone rubber.

5. A crosslinked polyethylene jacketed fire resistant power cable as in claim 1, wherein: the ceramic oxygen-insulating layer (8) is ceramic mud solidified by heating.

6. A crosslinked polyethylene jacketed fire resistant power cable as in claim 1, wherein: the corrosion-resistant layer (9) is made of ethylene propylene diene monomer.