CN212303160U - Cross-linked polyethylene insulated flame-retardant fire-resistant power cable - Google Patents

Abstract

The utility model discloses a fire-retardant fire-resistant power cable of crosslinked polyethylene insulation relates to power cable technical field, and is poor for solving current crosslinked polyethylene power cable flame retardant efficiency, meets the easy problem of damaging of strong fire. The utility model discloses a fire-retardant electric wire, including conductive core, shielding layer, fire-retardant package and compression resistant strip, conductive core is provided with four, four install the body that holds between the conductive core, four conductive core's externally mounted has the compression resistant cover, the outside parcel of compression resistant cover has the insulating layer, the outside parcel of insulating layer has the shielding layer, the outside parcel of shielding layer has the metal armor, install fire-retardant package and compression resistant strip between shielding layer and the metal armor, a plurality of is all installed to fire-retardant package and compression resistant strip, and the fire-retardant package of a plurality of borders on in proper order with the compression resistant strip, fire-retardant package and compression resistant strip and the equal fixed connection of shielding layer and metal armor, the inside packing of fire-retardant package has the fire retardant, the outside parcel of metal.

Description

Cross-linked polyethylene insulated flame-retardant fire-resistant power cable

Technical Field

The utility model relates to a power cable technical field specifically is fire-retardant fire-resistant power cable of crosslinked polyethylene insulation.

Background

With the progress of society and the development of science and technology, people can not live in production and life. The power cable is one of the components that must not be good in the power supply system, and mainly plays a role in transmitting and distributing electric energy. The cross-linked polyethylene power cable is one of various power cables, is a cable suitable for the field of power distribution networks and the like, and has the incomparable advantages of PVC insulated cables. It features simple structure, light weight, high heat resistance, strong load capacity, no fusion, high chemical corrosion resistance and high mechanical strength.

However, the existing crosslinked polyethylene power cable has poor flame retardant effect and is easy to damage in case of strong fire, so that the existing requirements are not met, and the crosslinked polyethylene insulating flame retardant fire-resistant power cable is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire-retardant fire-resistant power cable of crosslinked polyethylene insulation to the crosslinked polyethylene power cable flame retardant efficiency who proposes in solving above-mentioned background is poor, meets the easy problem of damaging of strong fire.

In order to achieve the above object, the utility model provides a following technical scheme: the cross-linked polyethylene insulated flame-retardant fire-resistant power cable comprises a conductive wire core, wherein the conductive wire core is provided with four or four bearing bodies and four bearing sleeves, the outer part of the conductive wire core is provided with a pressure-resistant sleeve, the outer part of the pressure-resistant sleeve is wrapped with an insulating layer, the outer part of the insulating layer is wrapped with a shielding layer, the outer part of the shielding layer is wrapped with a metal armor layer, a flame-retardant bag and a pressure-resistant strip are arranged between the shielding layer and the metal armor layer, the flame-retardant bag and the pressure-resistant strip are both provided with a plurality of, the flame-retardant bag and the pressure-resistant strip are sequentially abutted, the flame-retardant bag and the pressure-resistant strip are fixedly connected with the shielding layer and the metal armor layer, the flame retardant is filled in the flame-retardant bag, and the outer sleeve.

Preferably, the pressure-resistant sleeve comprises an upper sleeve body and a lower sleeve body, the upper sleeve body is arranged above the lower sleeve body, the inner parts of the upper sleeve body and the lower sleeve body are provided with four mounting grooves, and the number of the mounting grooves is four.

Preferably, the inner side of the lower end of the upper sleeve body is provided with a connecting groove, the inner side of the upper end of the lower sleeve body is provided with a connecting block, and the connecting block extends into the connecting groove and is attached to the upper sleeve body.

Preferably, four corners of the bearing body are provided with grooves, and the grooves are of arc structures.

Preferably, the upper sleeve body and the lower sleeve body are both of a semicircular structure.

Preferably, the compression resistant strips are arranged in a drum-like structure.

Preferably, the flame retardant is a PE halogen-free flame retardant.

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

1. the utility model discloses a by setting gradually fire-retardant package, metal armor and crosslinked polyethylene overcoat layer inside to outside, metal armor and crosslinked polyethylene overcoat layer all have certain fire resistance, meet fire and can not burn easily, the fire retardant has been filled to the inside of fire-retardant package, the fire retardant adopts the halogen-free fire retardant of PE, produce the expanded carbon layer in the combustion process, reach thermal-insulated, separate the effect of oxygen and prevent that surface flame from further diffusing, play the fire prevention, fire-retardant action, the environmental protection is nontoxic simultaneously. Through the combined action of the three components, the flame retardant effect of the power cable is greatly improved, and the power cable is not easy to damage when meeting strong fire.

2. The utility model discloses a resistance to compression cover is installed respectively and is accepted the body in four conductive core's the outside and inboard, resistance to compression cover all has good elasticity with accepting the body, resistance to compression cover is formed by two semicircular upper cover bodies and the equipment of lower cover body, inside set up with conductive core to the mounting groove that matches, the four corners department of accepting the body has set up the recess of four arc structures, from this with the fine parcel of four conductive core, hold, reach protection compressive action, also with the fine restriction of four conductive mounted position, make it be difficult for the dislocation.

3. The utility model discloses a set up the buffering strip between the adjacent fire-retardant package, buffering strip adopts the rubber material, has good shock attenuation, compressive property, further improves this power cable's resistance to compression effect.

Drawings

Fig. 1 is an overall cross-sectional view of the present invention;

FIG. 2 is a schematic view of a partial structure of the compression-resistant sleeve of the present invention;

fig. 3 is a schematic view of a partial structure of the supporting body of the present invention.

In the figure: 1. a conductive wire core; 2. a compression-resistant sleeve; 21. an upper sleeve body; 211. connecting grooves; 22. a lower sleeve body; 221. connecting blocks; 23. mounting grooves; 3. a receiving body; 31. a groove; 4. an insulating layer; 5. a shielding layer; 6. a flame retardant package; 7. a flame retardant; 8. anti-pressing strips; 9. a metal armor layer; 10. a crosslinked polyethylene jacket layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides an embodiment: the cross-linked polyethylene insulated flame-retardant fire-resistant power cable comprises four conductive wire cores 1 serving as main components for transmitting and distributing electric energy, wherein a bearing body 3 is arranged between the four conductive wire cores 1, a pressure-resistant sleeve 2 is arranged outside the four conductive wire cores 1, an insulating layer 4 is wrapped outside the pressure-resistant sleeve 2, a shielding layer 5 is wrapped outside the insulating layer 4, the insulating layer 4 and the shielding layer 5 have good insulating property and shielding wires, so that drying is reduced, partial discharge is prevented, the use safety of the power cable is improved, a metal armor layer 9 is wrapped outside the shielding layer 5, the power cable has strong mechanical strength, tensile strength and insect bite resistance, a plurality of flame-retardant packages 6 and pressure-resistant strips 8 are arranged between the shielding layer 5 and the metal armor layer 9, the flame-retardant packages 6 and the pressure-resistant strips 8 are respectively arranged, and the plurality of flame-retardant packages 6 and the pressure-resistant strips 8 are sequentially abutted, make anti layering 8 evenly distributed, guarantee the homogeneity of holding power distribution, fire-retardant package 6 and anti-pressing strip 8 and shielding layer 5 and the equal fixed connection of metal armor 9, connect reliably, the inside packing of fire-retardant package 6 has fire retardant 7, and the outside parcel of metal armor 9 has crosslinked polyethylene overcoat layer 10, and is heat-resisting good, load-carrying capacity is strong, resistant chemical corrosion, and mechanical strength is high.

Further, resistance to compression cover 2 includes the upper cover body 21 and the lower cover body 22, and the upper cover body 21 sets up in the top of the lower cover body 22, and the inside of the upper cover body 21 and the lower cover body 22 all is provided with mounting groove 23, and mounting groove 23 has four, with 1 number phase-match of electrically conductive sinle silk.

Further, the inboard of the lower extreme of the upper cover body 21 is provided with the connecting groove 211, and the inboard of the upper end of the lower cover body 22 is provided with the connecting block 221, and the connecting block 221 extends to the inside of the connecting groove 211 to be connected with the laminating of the upper cover body 21, increase the relation between the upper cover body 21 and the lower cover body 22, improve structural strength, and simultaneously, the easy concatenation.

Further, four corners of the supporting body 3 are provided with grooves 31, and the grooves 31 are of arc-shaped structures, so that the supporting body can be attached to the outer walls of the four conductive wire cores 1 conveniently.

Further, the upper sleeve body 21 and the lower sleeve body 22 are both arranged in a semicircular structure, and are combined to form a complete circle, so that the cladding is complete.

Furthermore, the compression resistant strip 8 is of a drum-like structure, so that the contact area between the compression resistant strip 8 and the shielding layer 5 and the metal armor layer 9 is increased, the compression resistant strip 8 is convenient to fix and install, and the compression resistant strip also has good compression resistance.

Further, the flame retardant 7 is a PE halogen-free flame retardant, is not hydrolyzed and precipitated, has good carbonization self-extinguishing property, excellent flame retardant efficiency, best hydrolysis resistance and environmental stability, high cost performance and environmental protection.

The working principle is as follows: during the use, cover the upper cover body 21 in the top of the lower cover body 22 to make the connecting block 221 of the upper end of the lower cover body 22 extend into the connecting groove 211 of the lower end of the upper cover body 21, realize the assembly of the anti-pressure sleeve 2, in the assembly process, put four conductive wire cores 1 into the mounting groove 23 of the upper cover body 21 and the lower cover body 22 respectively in proper order, put the bearing body 3 between four conductive wire cores 1, and make the grooves 31 of the four corners of the bearing body 3 laminate with one of the outer walls of the four conductive wire cores 1 respectively. From this fine parcel with four conductive wire core 1 to inject four conductive wire core 1's position, the compression sleeve 2 has certain elasticity with accepting body 3 simultaneously, reaches buffering, resistance to compression and protective effect from this. Insulating layer 4 and shielding layer 5 are by inside to outside parcel in proper order in the outside of resistance to compression cover 2, shielding layer 5 outside has still set gradually fire-retardant package 6 by inside to outside, metal armor 9 and crosslinked polyethylene overcoat layer 10 all have certain fire resistance, meet fire and can not burn easily, fire-retardant package 6's inside has been filled fire retardant 7, fire retardant 7 adopts the halogen-free fire retardant of PE, produce the expanded carbon layer in the combustion process, reach thermal-insulated, separate oxygen and prevent the effect of surface flame further diffusion, play the fire prevention, fire-retardant effect. The compression-resistant strip 8 is installed between the adjacent flame-retardant packages 6, the compression-resistant strip 8 is made of rubber, good shock absorption and compression resistance are achieved, the flame-retardant packages 6 can be supported, and meanwhile the compression-resistant effect of the power cable is also improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 (7)

1. Fire-retardant fire-resistant power cable of insulating of crosslinked polyethylene, including conductive core (1), its characterized in that: the cable is characterized in that four conductive wire cores (1) are arranged, a bearing body (3) is arranged between the four conductive wire cores (1), a pressure-resistant sleeve (2) is arranged outside the four conductive wire cores (1), an insulating layer (4) is wrapped outside the pressure-resistant sleeve (2), a shielding layer (5) is wrapped outside the insulating layer (4), a metal armor layer (9) is wrapped outside the shielding layer (5), a flame-retardant bag (6) and a pressure-resistant strip (8) are arranged between the shielding layer (5) and the metal armor layer (9), the flame-retardant bag (6) and the pressure-resistant strip (8) are both provided with a plurality of flame-retardant bags (6) and the pressure-resistant strip (8) which are sequentially abutted, the flame-retardant bags (6) and the pressure-resistant strip (8) are both fixedly connected with the shielding layer (5) and the metal armor layer (9), and a flame retardant agent (7) is filled inside the flame-retardant bag (6), the exterior of the metal armor layer (9) is wrapped with a cross-linked polyethylene outer sleeve layer (10).

2. The cross-linked polyethylene insulated flame retardant fire resistant power cable according to claim 1, characterized in that: the pressure-resistant sleeve (2) comprises an upper sleeve body (21) and a lower sleeve body (22), the upper sleeve body (21) is arranged above the lower sleeve body (22), the upper sleeve body (21) and the lower sleeve body (22) are both provided with mounting grooves (23), and the mounting grooves (23) are four.

3. The cross-linked polyethylene insulated flame retardant fire resistant power cable according to claim 2, characterized in that: the inboard of the lower extreme of the upper cover body (21) is provided with a connecting groove (211), the inboard of the upper end of the lower cover body (22) is provided with a connecting block (221), and the connecting block (221) extends to the inside of the connecting groove (211) and is attached to the upper cover body (21).

4. The cross-linked polyethylene insulated flame retardant fire resistant power cable according to claim 1, characterized in that: four corners of the bearing body (3) are provided with grooves (31), and the grooves (31) are of arc structures.

5. The cross-linked polyethylene insulated flame retardant fire resistant power cable according to claim 2, characterized in that: the upper sleeve body (21) and the lower sleeve body (22) are both arranged into a semicircular structure.

6. The cross-linked polyethylene insulated flame retardant fire resistant power cable according to claim 1, characterized in that: the anti-compression strip (8) is of a drum-like structure.

7. The cross-linked polyethylene insulated flame retardant fire resistant power cable according to claim 1, characterized in that: the flame retardant (7) is a PE halogen-free flame retardant.

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