CN218730044U - Fire-resistant power cable with crosslinked polyethylene sheath - Google Patents

Abstract

The utility model discloses a fire-resistant power cable of crosslinked polyethylene sheath, including compound protection rete and crowded package crosslinked polyethylene sheath outside compound protection rete, the inside wall of compound protection rete evenly is fixed with the fixed disk, spacing hole has evenly been seted up to one side of fixed disk, the inside package in spacing hole is equipped with the cable core. The utility model discloses a fire-resistant flame retardant ability of compound protective film layer reinforcing cable, can bear higher temperature when the circuit short circuit, reduce the risk that high temperature leads to the cable to catch fire, can completely cut off flame and cable core simultaneously, further improve the fire-resistant ability of cable, guarantee the intensity of cable under the high temperature environment, reduce the risk that high temperature leads to the cable damage, separate a plurality of cable cores through the fixed disk, and set up fire-retardant sponge filling layer between the cable core, prevent to arouse other cable core burning after partial cable core spontaneous combustion, reduce the influence that the cable core spontaneous combustion caused, the security performance of improvement cable.

Description

Fire-resistant power cable with cross-linked polyethylene sheath

Technical Field

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

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables.

The invention discloses a power cable with strong compression resistance, which comprises a rubber sleeve, wherein a waterproof rubber tube is sleeved in the rubber sleeve, a buffer sleeve is sleeved in the waterproof rubber tube, the device is convenient for buffering and protecting a cable core in the cable under the action of the buffer sleeve, the compression resistance of the cable is convenient to improve under the action of a stretching sealing strip and a stretching spring, the cable is prevented from deforming when external force is applied to the cable, the temperature on the surface of a core tube is convenient to be continuously conducted under the action of a heat insulation tube, a heat absorption filler and a heat conduction sheet, and the cable core is prevented from being heated and damaged when the current quantity of the power inside the cable is larger.

However, the fire resistance of the device is general, when a fire breaks out outside, the environment temperature is high, the combustion of the power cable is easily caused, the damage and the leakage of the cable are caused, and more serious consequences and loss are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire-resistant power cable of crosslinked polyethylene sheath to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fire-resistant power cable of crosslinked polyethylene sheath, includes compound protection rete and crowded package crosslinked polyethylene sheath outside compound protection rete, the inside wall of compound protection rete evenly is fixed with the fixed disk, spacing hole has evenly been seted up to one side of fixed disk, the inside package in spacing hole is equipped with the cable core, be equipped with the filling layer between cable core and the compound protection rete, the inside of cable core is equipped with the conductor, and the sleeve pipe is the carbon element bellows, and the conductor is the conductive metal material.

As further preferable in the present technical solution: the fixing disc is characterized in that mounting holes are uniformly formed in one side of the fixing disc, and traction-resistant wires are fixedly connected to the inside of the mounting holes and are made of carbon fiber materials.

As further preferable in the present technical solution: the inside fixedly connected with strengthening rib of fixed disk, the strengthening rib is the PVC material.

As further preferable in the present technical solution: the composite protective film layer comprises a first protective film layer, a second protective film layer, a third protective film layer and a fourth protective film layer;

the lateral wall of fourth protection rete has the third protection rete around the package, and the material of third protection rete is glass fiber for fire-retardant, and the material of fourth protection rete is high density polyethylene, is used for the cable waterproof.

As further preferable in the present technical solution: the lateral wall of third protection rete has the second protection rete around the package, and the second protection rete is the crosslinked polyethylene material for improve cable fire-resistant ability.

As further preferable in the present technical solution: the outer side wall of the second protective film layer is coated with a first protective film layer, and the first protective film layer is made of poly-p-phthalic plastic and used for improving the wear resistance of the cable.

As further preferable in the present technical solution: the outer side wall of the conductor is wrapped with an insulating layer, and the insulating layer is made of rubber.

As further preferable in the present technical solution: the lateral wall of insulating layer has the semiconductor shield layer around the package, the lateral wall of semiconductor shield layer has the metallic shield layer around the package, the inside wall of cable core is around the lateral wall of package in the metallic shield layer, the lateral wall coating of cable core has dampproofing coating, and the semiconductor shield layer is the semiconductor material, and the metallic shield layer is formed for tinned copper wire and fibre are woven.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a fire-resistant flame retardant ability of compound protecting film layer reinforcing cable, can bear higher temperature when the circuit short circuit, reduce the risk that high temperature leads to the cable to catch fire, simultaneously can completely cut off flame and cable core, further improve the fire-resistant ability of cable, guarantee the intensity of cable under the high temperature environment, reduce the risk that high temperature leads to the cable damage, separate a plurality of cable cores through the fixed disk, and set up fire-retardant sponge filling layer between the cable core, prevent to arouse other cable core burning after partial cable core spontaneous combustion, reduce the influence that the spontaneous combustion of cable core caused, the security performance of cable is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the composite protective film layer of the present invention;

fig. 3 is a schematic structural view of the present invention after removing the composite protective film layer and the filling layer;

fig. 4 is the schematic diagram of the cable core structure of the present invention.

In the figure: 10. compounding a protective film layer; 11. a first protective film layer; 12. a second protective film layer; 13. a third protective film layer; 14. a fourth protective film layer; 15. a crosslinked polyethylene jacket; 20. a filling layer; 21. fixing the disc; 22. mounting holes; 23. anti-traction wires; 24. a limiting hole; 25. reinforcing ribs; 30. a moisture resistant coating; 31. a cable core; 32. a metal shielding layer; 33. a semiconductor shielding layer; 34. an insulating layer; 35. a conductor.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides a technical solution: a fire-resistant power cable with a cross-linked polyethylene sheath comprises a composite protective film layer 10 and a cross-linked polyethylene sheath 15 extruded outside the composite protective film layer 10, wherein a fixed disc 21 is uniformly fixed on the inner side wall of the composite protective film layer 10, a limiting hole 24 is uniformly formed in one side of the fixed disc 21, a cable core 31 is wrapped in the limiting hole 24, a filling layer 20 is arranged between the cable core 31 and the composite protective film layer 10, and a conductor 35 is arranged in the cable core 31; the cable core 31 is a carbon corrugated tube with a shell, and has the advantages of good flexibility, high strength, corrosion resistance and light weight, the conductor 35 is made of conductive metal, such as copper core, and is used for transmitting power, and the filling layer 20 is filled with flame-retardant sponge to prevent the cable cores 31 from being affected with each other.

In this embodiment, specifically: mounting holes 22 are uniformly formed in one side of the fixing disc 21, anti-traction wires 23 are fixedly connected to the interior of the mounting holes 22, the anti-traction wires 23 are made of carbon fibers, the carbon fibers have the characteristics of high temperature resistance, friction resistance, heat conduction, corrosion resistance and the like, the strength is high, and the tensile capacity of the cable is greatly enhanced.

In this embodiment, specifically: the reinforcing ribs 25 are fixedly connected to the inside of the fixed disc 21, and the reinforcing ribs 25 are made of PVC materials and used for enhancing the mechanical strength of the cable and preventing the conductor 35 from being damaged due to the fact that the cable is bent excessively.

In this embodiment, specifically: the composite protective film layer 10 comprises a first protective film layer 11, a second protective film layer 12, a third protective film layer 13 and a fourth protective film layer 14;

the outer side wall of the fourth protective film layer 14 is wrapped with the third protective film layer 13, the fourth protective film layer 14 is made of high-density polyethylene HDPE, the HDPE is high in use temperature, good in hardness, tensile strength, electrical insulation, toughness and cold resistance, resistant to corrosion of acid, alkali and various salts, small in water vapor and air permeability and low in water absorption, and therefore a good waterproof effect can be achieved; the third protective film layer 13 is made of glass fiber, and the glass fiber has good insulation property, strong heat resistance, good corrosion resistance, high mechanical strength and is difficult to burn, so that a good flame retardant effect can be achieved.

In this embodiment, specifically: the lateral wall of third protection rete 13 has second protection rete 12 around the package, second protection rete 12 is the crosslinked polyethylene material, crosslinked polyethylene's heat resistance is higher than polyvinyl chloride, can use for a long time under 90 ℃, the heat-resisting temperature during the short circuit can reach 250 ℃ at most, insulation resistance is high, dielectric loss tangent is little, basically not change along with the change of temperature, there are good wearability and resistant environmental stress fracture simultaneously, in case take place that cable burning produces carbon dioxide and water, do not contain harmful gas, avoid producing environmental pollution, and density is less, can obviously alleviate the quality of overhead line.

In this embodiment, specifically: the lateral wall of second protection rete 12 has first protection rete 11 around the package, and first protection rete 11 material is for the PETP plastics of terephthalic acid class plastics, and PETP plastics have good wear-resisting friction nature and dimensional stability and electrical insulation nature, can increase the wear resistance of second protection rete 12.

In this embodiment, specifically: the insulating layer 34 has been lapped around the lateral wall of conductor 35, and insulating layer 34 is the rubber material for keep apart conductor 35, prevent the electric leakage.

In this embodiment, specifically: insulating layer 34's lateral wall has semiconductor shield layer 33 around the package, and semiconductor shield layer 33's lateral wall has metallic shield layer 32 around the package, and cable core 31's inside wall has the lateral wall in metallic shield layer 32 around the package, and cable core 31's lateral wall coating has moisture barrier coating 30, and semiconductor shield layer 33 is the semiconductor material for eliminate the air gap on conductive core surface, improve resistant partial discharge, branch discharge's ability.

Working principle or structural principle, in the use, whether the staff detects power cable is complete, confirm to install the cable in the assigned position after the cable does not have the damage, the cable is in the use, if lead to ambient temperature to rise because the outside is on fire, second protection rete 12 has good fire resistance, therefore can not burn easily, if the external environment high temperature leads to second protection rete 12 to burn, its inside third protection rete 13 can play good flame retardant efficiency, can protect inside cable core 31 from being damaged, can not produce harmful gas in the second protection rete 12 combustion process simultaneously, environmental pollution has been avoided, when the spontaneous combustion of cable inside cable core 31, because the existence of fixed disk 21 between a plurality of cable cores 31, can not contact each other, and filled the filling layer 20 of fire-retardant sponge preparation between the cable core 31, therefore other normal cable cores 31 can not receive the influence, the security performance of power cable has been improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a fire-resistant power cable of crosslinked polyethylene sheath which characterized in that: including compound protection rete (10) and crowded package crosslinked polyethylene sheath (15) outside compound protection rete (10), the inside wall of compound protection rete (10) evenly is fixed with fixed disk (21), spacing hole (24) have evenly been seted up to one side of fixed disk (21), the inside package in spacing hole (24) is equipped with cable core (31), be equipped with between cable core (31) and compound protection rete (10) filling layer (20), the inside of cable core (31) is equipped with conductor (35).

2. A fire-resistant power cable with a crosslinked polyethylene sheath according to claim 1, characterized in that: mounting holes (22) are uniformly formed in one side of the fixed disc (21), and anti-traction wires (23) are fixedly connected to the inner portions of the mounting holes (22).

3. A fire-resistant power cable with a crosslinked polyethylene sheath according to claim 2, characterized in that: and reinforcing ribs (25) are fixedly connected inside the fixed disc (21).

4. A fire-resistant power cable with a crosslinked polyethylene sheath according to claim 1, characterized in that: the composite protective film layer (10) comprises a first protective film layer (11), a second protective film layer (12), a third protective film layer (13) and a fourth protective film layer (14); the lateral wall of fourth protection rete (14) has third protection rete (13) around the package, the lateral wall of third protection rete (13) has second protection rete (12) around the package, the lateral wall of second protection rete (12) has first protection rete (11) around the package.

5. A fire-resistant power cable with a crosslinked polyethylene sheath according to claim 1, characterized in that: and the outer side wall of the conductor (35) is wrapped with an insulating layer (34).

6. The fire resistant power cable with a crosslinked polyethylene sheath according to claim 5, wherein: the lateral wall of insulating layer (34) has semiconductor shield layer (33) around the package, the lateral wall of semiconductor shield layer (33) has metal shield layer (32) around the package, the inside wall of cable core (31) is around the lateral wall in metal shield layer (32), the lateral wall coating of cable core (31) has dampproofing coating (30).

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