CN213877661U

CN213877661U - Safety self-extinguishing cable

Info

Publication number: CN213877661U
Application number: CN202120080870.XU
Authority: CN
Inventors: 林科锐
Original assignee: Guangdong Yile Construction Co ltd
Current assignee: Guangdong Yile Construction Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-08-03
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a safe type is from extinguishing cable, concretely relates to cable field, including inner core and the crust of parcel in the inner core outside, the inner core comprises cable core and interior flame retardant insulating layer, just interior flame retardant insulating layer parcel is on the surface of cable core, the crust comprises high temperature resistant layer, inoxidizing coating and outer flame retardant insulating layer, high temperature resistant layer parcel is in the outside of inner core, the inoxidizing coating parcel is in the outside on high temperature resistant layer, outer flame retardant insulating layer parcel is in the outside of inoxidizing coating. The utility model discloses a set up PVC storage ball, can catch fire at the cable after thermal expansion to exploding and split, the liquid carbon dioxide of PVC storage ball inside packing vaporizes rapidly, cools down the cable, and carbon dioxide packs rapidly in the inside of crust simultaneously, isolated air to put out a fire, through high temperature resistant layer, can make the crust can support the high temperature of intensity of a fire after the cable catches fire, thereby can cooperate PVC storage ball to put out a fire to the intensity of a fire, avoid the cable to be thoroughly lighted.

Description

Safety self-extinguishing cable

Technical Field

The utility model relates to the technical field of cables, more specifically say, the utility model relates to a safe type is from fire extinguishing cable.

Background

A cable is a conductor made of one or more conductors insulated from each other and an outer insulating sheath that carries power or information from one location to another. In an electric power system, a cable plays a role in transmitting electric energy, the electric energy transmitted by the cable provides requirements for industrial production and life of people, so the cable plays an important role in the current society, generally, a trunk cable is used for transmitting and distributing high-power cables and cannot be interrupted, if the influence caused by the interruption of the trunk cable is immeasurable, the basic life of people in the whole area can be seriously influenced, and the cable of the trunk has very high performance requirements.

The existing cable has some defects in some aspects during use and needs further improvement, and the existing cable is still poor in fire-resistant and high-temperature-resistant performance, so that ignition is caused during high-load carrying of the cable, once ignition occurs, a main trunk circuit is forced to be powered off, and daily life of people is affected.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a safe type is from putting out a fire cable 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 safe type is from extinguishing cable, includes inner core and the crust of parcel in the inner core outside, the inner core comprises cable core and internal flame retardant insulating layer, just the surface at the cable core of internal flame retardant insulating layer parcel, the crust comprises high temperature resistant layer, inoxidizing coating and outer flame retardant insulating layer, the outside at the inner core is wrapped up in to high temperature resistant layer, the inoxidizing coating parcel is in the outside on high temperature resistant layer, outer flame retardant insulating layer parcel is in the outside of inoxidizing coating, crack department between inner core and the crust is provided with the PVC storage ball of packing fire extinguishing material.

Furthermore, the protective layer consists of a metal layer, a corrosion-resistant layer and an anti-aging layer, the corrosion-resistant layer is wrapped outside the metal layer, and the anti-aging layer is wrapped outside the corrosion-resistant layer.

Furthermore, the inner flame-retardant insulating layer and the outer flame-retardant insulating layer are both made of flame-retardant cross-linked polyethylene materials.

Further, the high temperature resistant layer is a mica layer.

Further, the inside of the PVC storage ball is filled with liquid carbon dioxide.

Furthermore, the metal layer is formed by weaving a plurality of fine iron wires, and the metal layer is netted.

Further, the anti-aging layer is a chloroprene rubber layer, and the corrosion-resistant layer is a polyperfluoroalkoxy resin layer.

The utility model discloses a technological effect and advantage:

1. compared with the prior art, through setting up PVC storage ball, can catch fire at the cable after the thermal expansion to exploding and split, the liquid carbon dioxide of PVC storage ball inside packing vaporizes rapidly, cools down the cable, carbon dioxide packs rapidly in the inside of crust simultaneously, isolated air to put out a fire, through high temperature resistant layer, can make the crust can support the high temperature of intensity of a fire after the cable catches fire, thereby can cooperate PVC storage ball to put out a fire to the intensity of a fire, avoid the cable to be thoroughly lighted.

2. Compared with the prior art, through setting up internal flame-retardant insulating layer and outer flame-retardant insulating layer, can utilize internal flame-retardant insulating layer to carry out fire-retardant when insulating the cable core, can utilize outer flame-retardant insulating layer to carry out fire-retardant to external burning things which may cause a fire disaster, through setting up the corrosion resistant layer, can increase the corrosion resisting property of cable effectively, make the crust avoid being corroded in external adverse circumstances, utilize anti-aging layer simultaneously, can avoid the crust to expose for a long time in the air and ageing, utilize the metal level, can increase the tensile strength of crust, make the crust to parcel and supporting role better to the inner core.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the layer structure of the outer skin of the present invention.

Fig. 3 is a schematic view of the layered structure of the protective layer of the present invention.

The reference signs are: 1. an inner core; 11. a cable core; 12. an inner flame-retardant insulating layer; 2. a skin; 21. a high temperature resistant layer; 22. a protective layer; 221. a metal layer; 222. a corrosion-resistant layer; 223. an anti-aging layer; 23. an outer flame retardant insulating layer; 3. PVC storage balls.

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.

The safety self-extinguishing cable shown in the attached figures 1-3 comprises an inner core 1 and a sheath 2 wrapped outside the inner core 1, wherein the inner core 1 consists of a cable core 11 and an inner flame-retardant insulating layer 12, the inner flame-retardant insulating layer 12 is wrapped on the surface of the cable core 11, the sheath 2 consists of a high temperature resistant layer 21, a protective layer 22 and an outer flame-retardant insulating layer 23, the high temperature resistant layer 21 is wrapped outside the inner core 1, the protective layer 22 is wrapped outside the high temperature resistant layer 21, the outer flame-retardant insulating layer 23 is wrapped outside the protective layer 22, and a PVC storage ball 3 filled with a fire extinguishing material is arranged at a crack between the inner core 1 and the sheath 2.

In a preferred embodiment, the shield layer 22 is composed of a metal layer 221, a corrosion-resistant layer 222, and an anti-aging layer 223, the corrosion-resistant layer 222 being wrapped outside the metal layer 221, and the anti-aging layer 223 being wrapped outside the corrosion-resistant layer 222, so that the tensile strength, the corrosion resistance, and the anti-aging property of the outer skin 2 can be increased by the shield layer 22.

In a preferred embodiment, the inner flame-retardant insulating layer 12 and the outer flame-retardant insulating layer 23 are made of flame-retardant cross-linked polyethylene, the cross-linked modified PE has a significantly improved temperature resistance, and the heat resistance temperature of the PE can be increased from 70 ℃ to 90 ℃ or higher, and the cross-linked polyethylene is applied to the insulating layer of the power cable, so that the heat resistance of the power cable can be effectively improved, the inner flame-retardant insulating layer 12 can be used for insulating the cable core 11 and retarding flame, and the outer flame-retardant insulating layer 23 can be used for retarding flame of an external fire source.

In a preferred embodiment, the high temperature resistant layer 21 is a mica layer, and the mica tape can withstand high temperature of about 1300 ℃ without melting, so that the sheath 2 can resist the high temperature of fire after the cable is on fire through the high temperature resistant layer 21, and the PVC storage ball 3 can be matched to extinguish the fire and prevent the cable from being completely ignited.

In a preferred embodiment, the inside of the PVC storage ball 3 is filled with liquid carbon dioxide, so that the PVC storage ball 3 can be heated and expanded to burst after the cable is on fire, the liquid carbon dioxide filled in the PVC storage ball 3 is rapidly vaporized to cool the cable, and the carbon dioxide is rapidly filled in the sheath 2 to isolate air, thereby extinguishing the fire.

In a preferred embodiment, the metal layer 221 is woven by a plurality of fine iron wires, and the metal layer 221 is in a net shape, so that the tensile strength of the outer skin 2 can be increased by the fine iron wires woven into the net shape, so that the outer skin 2 can better wrap and support the inner core 1.

In a preferred embodiment, the anti-aging layer 223 is a chloroprene rubber layer, the chloroprene rubber has good physical and mechanical properties, has good aging and heat resistance, and the corrosion-resistant layer 222 is a polyperfluoroalkoxy resin layer, the polyperfluoroalkoxy resin is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, the melt adhesion is enhanced, the melt viscosity is reduced, the properties are unchanged compared with those of the polytetrafluoroethylene, and has good corrosion resistance, so that the corrosion resistance of the cable can be effectively increased by providing the corrosion-resistant layer 222, the sheath 2 is prevented from being corroded in the external severe environment, and the aging of the sheath 2 due to long-term exposure to the air can be prevented by using the anti-aging layer 223.

The utility model discloses the theory of operation: by arranging the PVC storage ball 3, the cable can be heated and expanded to burst after being ignited, the liquid carbon dioxide filled in the PVC storage ball 3 is rapidly vaporized to cool the cable, meanwhile, the carbon dioxide is rapidly filled in the sheath 2 to isolate air, thereby extinguishing the fire, the sheath 2 can be enabled to support the high temperature of the fire after the cable is ignited by the high temperature resistant layer 21, thereby being capable of cooperating with the PVC storage ball 3 to extinguish the fire and preventing the cable from being completely ignited, the inner flame-retardant insulating layer 12 and the outer flame-retardant insulating layer 23 are arranged, the inner flame-retardant insulating layer 12 can be utilized to insulate the cable 11 and simultaneously perform flame retardance, the outer flame-retardant insulating layer 23 can be utilized to retard the external fire source, the corrosion resistance of the cable can be effectively improved by arranging the corrosion-resistant layer 222, and the sheath 2 is prevented from being corroded in the external severe environment, meanwhile, the anti-aging layer 223 is utilized to prevent the outer skin 2 from being aged due to long-time exposure in the air, and the metal layer 221 is utilized to increase the tensile strength of the outer skin 2, so that the outer skin 2 can better wrap and support the inner core 1.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a safe type is from extinguishing fire cable, includes inner core (1) and parcel at inside core (1) outside crust (2), its characterized in that: inner core (1) comprises cable core (11) and interior fire-retardant insulating layer (12), just interior fire-retardant insulating layer (12) parcel is on the surface of cable core (11), crust (2) comprises high temperature resistant layer (21), inoxidizing coating (22) and outer fire-retardant insulating layer (23), high temperature resistant layer (21) parcel is in the outside of inner core (1), inoxidizing coating (22) parcel is in the outside of high temperature resistant layer (21), outer fire-retardant insulating layer (23) parcel is in the outside of inoxidizing coating (22), crack department between inner core (1) and crust (2) is provided with PVC storage ball (3) of packing fire extinguishing material.

2. A safety self-extinguishing cable according to claim 1, characterized in that: the protective layer (22) is composed of a metal layer (221), a corrosion-resistant layer (222) and an anti-aging layer (223), the corrosion-resistant layer (222) is wrapped outside the metal layer (221), and the anti-aging layer (223) is wrapped outside the corrosion-resistant layer (222).

3. A safety self-extinguishing cable according to claim 2, characterized in that: the inner flame-retardant insulating layer (12) and the outer flame-retardant insulating layer (23) are both made of flame-retardant cross-linked polyethylene materials.

4. A safety self-extinguishing cable according to claim 3, characterized in that: the high-temperature resistant layer (21) is a mica layer.

5. A safety self-extinguishing cable according to claim 4, characterized in that: the PVC storage ball (3) is filled with liquid carbon dioxide.

6. A safety self-extinguishing cable according to claim 5, characterized in that: the metal layer (221) is formed by weaving a plurality of fine iron wires, and the metal layer (221) is net-shaped.

7. A safety self-extinguishing cable according to claim 6, characterized in that: the anti-aging layer (223) is a chloroprene rubber layer, and the corrosion-resistant layer (222) is a polyperfluoroalkoxy resin layer.