CN212161400U

CN212161400U - Super A-class flame-retardant power cable

Info

Publication number: CN212161400U
Application number: CN202021121396.2U
Authority: CN
Inventors: 梅宇航; 蔺泉
Original assignee: Yunnan Longyuan Cable Co ltd
Current assignee: Yunnan Longyuan Cable Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-12-15
Anticipated expiration: 2030-06-17

Abstract

The utility model belongs to the power cable field, in particular to a super A-class flame-retardant power cable, which comprises a protective sleeve layer and three wire cores, wherein the inner wall of the protective sleeve layer is fixedly connected with a plurality of connecting layers which are distributed in an annular shape, an inner protective layer is arranged inside the protective sleeve layer, the inner protective layer is fixedly connected with the protective sleeve layer through a plurality of connecting layers, and a flame-retardant filling layer is arranged between the protective sleeve layer and the inner protective layer; when external hard objects are scraped and rubbed on the surface of the protective sleeve layer, the hard objects are buffered by the connecting layer and cannot directly contact with the inner protective layer, and through the arrangement of the gap between the protective sleeve layer and the inner protective layer, a moving space is provided for the connecting layer when the connecting layer is deformed in a buffering mode, even if the surface of the protective sleeve layer is scratched and broken by the hard objects, the flame-retardant effect can be achieved through the arrangement of the flame-retardant filling layer at the first time, the flame-retardant effect is prevented from being poor due to the breakage of the protective sleeve layer, and therefore the risk during use is reduced.

Description

Super A-class flame-retardant power cable

Technical Field

The utility model belongs to the power cable field specifically is a fire-retardant power cable of super A class.

Background

The power cable is used for transmitting and distributing electric energy, the power cable 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, along with the continuous expansion of the scale of industries such as China power industry, data communication industry, urban rail traffic industry, automobile industry, shipbuilding and the like, the demand on the power cable also rapidly increases, the power cable has huge development potential in the future, meanwhile, the requirement on the power cable is higher and higher to meet the market demand, and the highest flame-retardant grade in the current market is the A-type flame-retardant power cable.

When an existing flame-retardant cable is extruded by an external sharp object and a hard object, the surface of the existing flame-retardant cable is easy to damage, and after the surface of the cable is damaged, the flame-retardant performance of the cable is easily directly influenced, so that if the damaged position is not found out in time in subsequent use, potential safety hazards can be directly caused, and the risk in use is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire-retardant power cable of super A class to solve the problem that proposes in 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-retardant power cable of super A class, includes protective sheath layer and three sinle silk, the inner wall fixedly connected with a plurality of protective sheath layer is the articulamentum that the annular distributes, the inside of protective sheath layer is equipped with the inner protective layer, the inner protective layer passes through a plurality of the articulamentum with protective sheath layer fixed connection, the protective sheath layer with be equipped with fire-retardant filling layer between the inner protective layer, it is three the sinle silk all is located the inboard of inner protective layer, the inner wall fixedly connected with separate layer of inner protective layer, the inside of inner protective layer is passed through the separate layer is separated and is had three line body separation chamber, and is three the sinle silk is located threely respectively line body separation intracavity, the separate layer with be equipped with the shielding filling.

As a further aspect of the present invention: a gap is formed between the protective sleeve layer and the inner protective layer, and the flame-retardant filling layer is arranged in the gap.

As a further aspect of the present invention: and a core wire insulating layer is arranged outside the wire core and is made of polyolefin insulating material.

As a further aspect of the present invention: the connecting layer is made of chlorinated polyethylene, and the flame-retardant filling layer is made of high-flame-retardant glass fiber.

As a further aspect of the present invention: the protective sleeve layer and the inner protective layer are both made of polyvinyl chloride materials.

As a further aspect of the present invention: the shielding filling layer is a copper mesh braid layer.

As a further aspect of the present invention: the clearance between the protective sleeve layer and the inner protective layer is six millimeters.

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

this scheme is when external hard object is cut to pieces and is rubbed the surface of protective sheath layer, hard object receives the buffering of articulamentum can directly not contact with interior protective layer, and through the setting in clearance between protective sheath layer and the interior protective layer, give an activity space of articulamentum when buffering deformation, even protective sheath layer surface receives hard object to be cut to pieces and rub and break, also can play flame retardant efficiency through the very first time of setting up of fire-retardant filling layer, prevent to lead to the fact flame retardant efficiency to worsen because of protective sheath breaks, thereby reduce the risk when using, and separate out three sinle silks through the separate layer, also can make things convenient for the separation of follow-up sinle silk when wire stripping, prevent that three sinle silks twine and influence wire stripping efficiency together, thereby the practicality has been improved.

Drawings

FIG. 1 is a schematic structural diagram of a super class A flame retardant power cable;

FIG. 2 is a schematic structural diagram of an inner protective layer, a core and a separation layer in a super A-class flame retardant power cable;

FIG. 3 is a top view of an inner protective layer and a tie layer in a super class A flame retardant power cable;

fig. 4 is a schematic structural diagram of an interlayer in an ultra-class a flame-retardant power cable.

In the figure: 1. a protective jacket layer; 11. a connecting layer; 12. a flame retardant filler layer; 13. a gap; 2. an inner protective layer; 21. a wire body separation chamber; 3. a wire core; 31. a core wire insulating layer; 4. a separation layer; 41. and shielding the filling layer.

Detailed Description

Please refer to fig. 1-4, in an embodiment of the present invention, a super a-class flame retardant power cable, includes a protective sheath 1 and three cores 3, the inner wall of the protective sheath 1 is fixedly connected with a plurality of connecting layers 11 distributed in an annular shape, the protective sheath 1 is internally provided with an inner protective layer 2, the inner protective layer 2 is fixedly connected with the protective sheath 1 through the plurality of connecting layers 11, a flame retardant filling layer 12 is arranged between the protective sheath 1 and the inner protective layer 2, the three cores 3 are all located inside the inner protective layer 2, the inner wall of the inner protective layer 2 is fixedly connected with a separation layer 4, the inner protective layer 2 is internally separated by the separation layer 4 to form three line body separation cavities 21, the three cores 3 are respectively located in the three line body separation cavities 21, and a shielding filling layer 41 is arranged between the separation layer 4 and the inner protective; when external hard objects are scraped to the surface of the protective sleeve layer 1, the buffer with the elastic connecting layer 11 cannot directly contact with the inner protective layer 2, and the gap 13 between the protective sleeve layer 1 and the inner protective layer 2 is arranged, so that an activity space of the connecting layer 11 in the buffer deformation process is provided, even if the surface of the protective sleeve layer 1 is scratched by the hard objects to break, the flame-retardant effect can be achieved through the first time of arrangement of the flame-retardant filling layer 12, the flame-retardant effect is prevented from being deteriorated due to the breakage of the protective sleeve layer 1, the possibility that the inner protective layer 2 is damaged is reduced, and the safety performance is further improved. Reduce the risk nature when using, and separate out three sinle silk 3 through separate layer 4 and make three sinle silks 3 be located three line body separating chamber 21 respectively among, to the separation of three sinle silk 3 when also can make things convenient for follow-up wire stripping, prevent that three sinle silk 3 twines to influence wire stripping efficiency together, and separate layer 4 also plays the supporting role when protective coating 1 and inner protective layer 2 receive the people foot to trample, also can prevent that 2 inside sinle silks 3 of inner protective layer from receiving the people foot to trample and twist and connect together, thereby the practicality has been improved.

In fig. 1: a gap 13 is formed between the protective sleeve layer 1 and the inner protective layer 2, the flame-retardant filling layer 12 is arranged in the gap 13, and the gap 13 between the protective sleeve layer 1 and the inner protective layer 2 is six millimeters; through the setting in six millimeter clearance 13 between protection jacket layer 1 and the interior protective layer 2, give a activity space of articulamentum 11 when buffering deformation, make articulamentum 11 protect interior protective layer 2 when receiving extrusion deformation, reduce the local pressure that interior protective layer 2 received to reduce interior protective layer 2 and receive the possibility of cutting the damage, thereby further improved the security performance.

In fig. 2: a core wire insulating layer 31 is arranged outside the wire core 3, and the core wire insulating layer 31 is made of polyolefin insulating material; chlorinated polyethylene has excellent ozone resistance, weatherability, color stability, chemical resistance, oil resistance and flame retardancy, and the core wire insulating layer 31, which is the name of polyolefin insulating material, plays the role of insulating protection to the wire core 3, and can further improve the flame retardant effect, so that the flame retardant property is higher, and the possibility of potential safety hazard is reduced.

In fig. 1 and 3: the connecting layer 11 is made of chlorinated polyethylene, and the flame-retardant filling layer 12 is made of high-flame-retardant glass fiber; chlorinated polyethylene material has good elasticity and heat resistance, makes outside hard thing can not direct and interior protective layer 2 contact after crushing protection jacket layer 1 through the buffering that receives to have elastic articulamentum 11, and glass fiber is the inorganic non-metallic material of a performance excellence, and the variety is various, and the advantage is that insulating nature is good, the heat resistance is strong, corrosion resistance is good, plays the fire-retardant thermal-insulated effect to interior protective layer 2 through the fire-retardant filling layer 12 of glass fiber material.

In fig. 1: the protective sheath layer 1 and the inner protective layer 2 are made of polyvinyl chloride materials, and the shielding filling layer 41 is a copper mesh braid layer; the polyvinyl chloride material has good insulating property, further improves the insulating effect to sinle silk 3 through protective sheath layer 1 and the inner protective layer 2 of polyvinyl chloride material, and shielding filling layer 41 that the netted weaving layer of copper was made plays and is to reduce the influence of external electromagnetic field to power or communication line, and has played the effect that prevents the outside radiation electromagnetic energy of circuit.

The utility model discloses a theory of operation is: when external hard objects are scraped and rubbed on the surface of the protective sleeve layer 1, the buffer layer 11 with elasticity can not be in direct contact with the inner protective layer 2, and through the arrangement of the gap 13 between the protective sleeve layer 1 and the inner protective layer 2, an active space is provided for the connecting layer 11 during buffer deformation, even if the surface of the protective sleeve layer 1 is scratched and broken by the hard objects, the flame-retardant effect can be achieved at the first time through the arrangement of the flame-retardant filling layer 12, the flame-retardant effect is prevented from being deteriorated due to the breakage of the protective sleeve layer 1, the possibility that the inner protective layer 2 is damaged by cutting is reduced, the safety performance is further improved, the risk during use is reduced, the overall safety performance is improved, the three wire cores 3 are separated by the separation layer 4, the three wire cores 3 are respectively positioned in the three separation cavities 21, and the separation of the three wire cores 3 during subsequent wire stripping can be facilitated, prevent that three sinle silk 3 twines to influence wire stripping efficiency together, and separate layer 4 also plays the supporting role when protecting coat 1 and inner protective layer 2 receive the people foot and trample, also can prevent that the inside sinle silk 3 of inner protective layer 2 from receiving the people foot and trampling to twist and connect together to thereby improved the practicality and improved the practicality.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A super A-class flame-retardant power cable comprises a protective sleeve layer (1) and three wire cores (3), and is characterized in that the inner wall of the protective sleeve layer (1) is fixedly connected with a plurality of connecting layers (11) which are distributed in an annular manner, an inner protective layer (2) is arranged inside the protective sleeve layer (1), the inner protective layer (2) is fixedly connected with the protective sleeve layer (1) through the connecting layers (11), a flame-retardant filling layer (12) is arranged between the protective sleeve layer (1) and the inner protective layer (2), the three wire cores (3) are all positioned on the inner side of the inner protective layer (2), the inner wall of the inner protective layer (2) is fixedly connected with a separation layer (4), the inside of the inner protective layer (2) is separated by the separation layer (4) to form three wire body separation cavities (21), and the three wire cores (3) are respectively positioned in the three wire body separation cavities (21), and a shielding filling layer (41) is arranged between the separation layer (4) and the inner protection layer (2).

2. A fire retardant power cable according to claim 1, wherein a gap (13) is provided between the protective sheath (1) and the inner protective layer (2), and the fire retardant filler layer (12) is disposed in the gap (13).

3. A fire retardant power cable according to claim 1, wherein said core (3) is externally provided with a core insulation layer (31), and said core insulation layer (31) is made of polyolefin insulation material.

4. The ultra class A flame-retardant power cable according to claim 1, wherein the connection layer (11) is made of chlorinated polyethylene, and the flame-retardant filling layer (12) is made of high flame-retardant glass fiber.

5. The ultra class A flame-retardant power cable according to claim 1, wherein the protective sheath layer (1) and the inner protective layer (2) are both made of polyvinyl chloride.

6. A fire retardant power cable according to claim 1, characterized in that said shielding and filling layer (41) is a copper mesh braid.

7. A fire retardant power cable according to claim 1, characterized in that the gap (13) between the protective sheath (1) and the inner protective layer (2) is six millimetres.