CN217640759U

CN217640759U - 35kV aluminum alloy core crosslinked polyethylene insulation halogen-free low-smoke flame-retardant power cable

Info

Publication number: CN217640759U
Application number: CN202221242955.4U
Authority: CN
Inventors: 郑连元; 冯国五; 田忠; 邵冰; 吴维
Original assignee: Yangzhou Shuguang Cable Co Ltd
Current assignee: Yangzhou Shuguang Cable Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-10-21
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a low cigarette fire-retardant power cable of 35kV aluminum alloy core crosslinked polyethylene insulation halogen-free of power cable technical field, which comprises a conductor, the surface of conductor is equipped with insulating layer and shielding layer in proper order, and the outside parcel of conductor is provided with the steel band armor, the surface of steel band armor is equipped with the buffering isolation layer, and the outside of buffering isolation layer is equipped with fire-retardant layer, the fire-retardant layer outside is equipped with the oversheath that the cladding set up, it is provided with the filling layer to fill between the outside of conductor and the steel band armor, the utility model discloses can effectively improve the flame retardant efficiency of cable, avoid the cable to appear spontaneous combustion phenomenon meetting the naked light, improved the use factor of safety of cable, and the buffering isolation layer can improve the compressive property of cable, avoid the cable to appear damaging when receiving external force extrusion, prolonged the life of cable.

Description

35kV aluminum alloy core crosslinked polyethylene insulation halogen-free low-smoke flame-retardant power cable

Technical Field

The utility model relates to a power cable technical field specifically is the low fire-retardant power cable of steamed low cigarette of 35kV aluminum alloy core crosslinked polyethylene insulation.

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. The power cable is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and comprises 1-500KV and above various voltage levels, the flame retardant property of the existing 35kV aluminum alloy core crosslinked cable is poor, the cable is easy to burn out when exposed fire occurs, the service life of the cable is shortened, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low fire-retardant power cable of 35kV aluminum alloy core crosslinked polyethylene insulation halogen-free to solve the poor problem of the flame retardant property of the power cable who proposes in the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

35kV aluminum alloy core crosslinked polyethylene insulation does not have steamed low fire-retardant power cable of cigarette, including the conductor, the surface of conductor is equipped with insulating layer and shielding layer in proper order, and the outside parcel of conductor is provided with the steel band armor, the surface of steel band armor is equipped with the buffering isolation layer, and the outside of buffering isolation layer is equipped with fire-retardant layer, the fire-retardant layer outside is equipped with the oversheath that the cladding set up, it is provided with the filling layer to fill between the outside of conductor and the steel band armor.

Further: the flame-retardant layer comprises a flame-retardant viscose fiber layer and a PBI fiber layer, and the PBI fiber layer is positioned on the inner side of the flame-retardant viscose fiber layer.

And further: buffer isolation layer in-connection has the multiunit resistance to compression block rubber, and the resistance to compression block rubber is that the annular array distributes in buffer isolation layer, and is adjacent be equipped with tensile rubber strip between the resistance to compression block rubber.

Further: the thickness of the flame-retardant viscose fiber layer and the thickness of the PBI fiber layer are both 0.12-0.16mm.

And further: the conductor, the insulating layer and the shielding layer are connected through an adhesive.

And further: the filling layer is a rubber filling layer.

And further: the outer surface of the outer sheath is coated with a wear-resistant coating.

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

1. the utility model discloses oversheath, fire-retardant viscose fibrous layer and the PBI fibrous layer of making by low smoke and zero halogen flame retardant sheath material can effectively improve the flame retardant property of cable, avoid the cable to appear the spontaneous combustion phenomenon meetting the naked light, have improved the application safety factor of cable, have prolonged the life of cable.

2. The oval compression-resistant rubber block of buffering isolation layer inner chamber uses with the cooperation of tensile rubber strip, can provide multi-directional guard action for the cable, avoids the cable to appear damaging, cracked condition when the atress is extruded, has improved the compressive capacity of cable, has further effectively protected the cable, and the practicality is good.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the structure of the buffer isolation layer of the present invention;

fig. 3 is a schematic view of the structure of the flame retardant layer of the present invention.

In the figure: 1. a conductor; 2. an insulating layer; 3. a shielding layer; 4. a filling layer; 5. a steel tape armor layer; 6. a buffer isolation layer; 601. a compression-resistant rubber block; 602. a tensile rubber strip; 7. a flame retardant layer; 701. a flame retardant viscose fiber layer; 702. a layer of PBI fibers; 8. an outer sheath.

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.

Example 1:

referring to fig. 1, the present invention provides a technical solution: 35kV aluminum alloy core crosslinked polyethylene insulation halogen-free low-smoke flame-retardant power cable, including conductor 1, the surface of conductor 1 is equipped with insulating layer 2 and shielding layer 3 in proper order, and the outside parcel of conductor 1 is provided with steel strip armor 5, the surface of steel strip armor 5 is equipped with buffering isolation layer 6, and the outside of buffering isolation layer 6 is equipped with fire-retardant layer 7, the fire-retardant layer 7 outside is equipped with the oversheath 8 that the cladding set up, it is provided with filling layer 4 to fill between the outside of conductor 1 and the steel strip armor 5, insulating layer 2 is crosslinked polyethylene, make 8 uses of cooperation fire-retardant layer 7 by the fire-retardant sheath material of low smoke and zero halogen, the fire-retardant effect of multilayer has been played, can improve the fire behaviour of cable, avoid the cable to appear spontaneous combustion phenomenon when meetting open fire, and the fire-retardant sheath material of low smoke and zero halogen can not produce harmful flue gas after burning, buffering isolation layer 6 can provide the guard action for the cable, prevent the condition that the cable appears damaging after the atress extrusion, further effectively protected the cable, the life of cable is prolonged.

Referring to fig. 1 and fig. 3, preferably, the flame retardant layer 7 includes a flame retardant adhesive fiber layer 701 and a PBI fiber layer 702, and the PBI fiber layer 702 is located inside the flame retardant adhesive fiber layer 701, and the flame retardant adhesive fiber layer 701 and the PBI fiber layer 702 have a flame retardant effect, so as to perform a flame retardant effect on the electric wire and cable, and avoid the occurrence of conditions such as spontaneous combustion of the electric wire and cable due to an open flame caused by a poor flame retardant effect of the existing electric wire and cable.

Please refer to fig. 1 and fig. 2, preferably, a plurality of sets of compression-resistant rubber blocks 601 are connected in the buffer isolation layer 6, and the compression-resistant rubber blocks 601 are distributed in the buffer isolation layer 6 in an annular array, a tensile rubber strip 602 is arranged between adjacent compression-resistant rubber blocks 601, the shape of the compression-resistant rubber blocks 601 is oval, the protection effect in the vertical direction can be provided for the cable, the tensile rubber strip 602 can provide the protection effect in the transverse direction for the cable, the condition that the cable is damaged when being extruded by force is avoided, the cable is effectively protected, and the service life of the cable is prolonged.

Referring to fig. 1 and 3, preferably, the thickness of the flame retardant adhesive fiber layer 701 and the thickness of the PBI fiber layer 702 are both 0.12-0.16mm.

Referring to fig. 1, the conductor 1, the insulating layer 2 and the shielding layer 3 are preferably connected by an adhesive.

Referring to fig. 1, preferably, the filling layer 4 is a rubber filling layer, the filling layer 4 may also be a filling rope, and the rubber filling layer has an elastic effect and can also provide protection for the cable.

Example 2:

referring to fig. 1, this embodiment is different from the first embodiment in that: the outer surface of the outer sheath 8 is coated with a wear-resistant coating, and the wear-resistant coating has a wear-resistant effect and can improve the wear-resistant performance of the cable.

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

1.35kV aluminum alloy core crosslinked polyethylene insulation does not have steamed low fire-retardant power cable of cigarette, including conductor (1), its characterized in that: the surface of conductor (1) is equipped with insulating layer (2) and shielding layer (3) in proper order, and the outside parcel of conductor (1) is provided with steel band armor (5), the surface of steel band armor (5) is equipped with buffering isolation layer (6), and the outside of buffering isolation layer (6) is equipped with fire-retardant layer (7), fire-retardant layer (7) outside is equipped with oversheath (8) that the cladding set up, it is provided with filling layer (4) to fill between the outside of conductor (1) and steel band armor (5).

2. The 35kV aluminum alloy core crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, which is characterized in that: the flame-retardant layer (7) comprises a flame-retardant viscose fiber layer (701) and a PBI fiber layer (702), and the PBI fiber layer (702) is positioned on the inner side of the flame-retardant viscose fiber layer (701).

3. The 35kV aluminum alloy core crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, which is characterized in that: buffer isolation layer (6) in-connection has multiunit resistance to compression block rubber (601), and resistance to compression block rubber (601) are the annular array and distribute in buffer isolation layer (6), and is adjacent be equipped with tensile rubber strip (602) between resistance to compression block rubber (601).

4. The 35kV aluminum alloy core crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 2, characterized in that: the thickness of the flame-retardant viscose fiber layer (701) and the thickness of the PBI fiber layer (702) are both 0.12-0.16mm.

5. The 35kV aluminum alloy core crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, which is characterized in that: the conductor (1), the insulating layer (2) and the shielding layer (3) are connected through an adhesive.

6. The 35kV aluminum alloy core crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, which is characterized in that: the filling layer (4) is a rubber filling layer.

7. The 35kV aluminum alloy core crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, which is characterized in that: the outer surface of the outer sheath (8) is coated with a wear resistant coating.