CN210325314U

CN210325314U - Flexible fireproof cable

Info

Publication number: CN210325314U
Application number: CN201921389010.3U
Authority: CN
Inventors: 陈杰; 牛杰; 谭斌; 许冬
Original assignee: Wuhan Xintiandi Electrician Technology Co Ltd
Current assignee: Wuhan Xintiandi Electrician Technology Co Ltd
Priority date: 2019-08-24
Filing date: 2019-08-24
Publication date: 2020-04-14
Anticipated expiration: 2029-08-24

Abstract

The utility model discloses a flexible fireproof cable relates to wire and cable's technical field, include by copper core, insulating layer, middle filling layer and the metal sheath that sets gradually outside to inside, the copper core sets up to many, the insulating layer adopts synthetic mica tape, the inside grafting of insulating layer has the heat conduction core, heat conduction core perisporium has set firmly a plurality of heat conduction poles, the heat conduction pole dorsad heat conduction core one end passes in proper order the insulating layer with behind the middle filling layer with metal sheath connects. Through adopting above-mentioned technical scheme, the cable can produce a large amount of heats in the copper core when the great occasion of electric current of continuous work, and the heat around the copper core can transmit for the heat conduction core this moment, then utilizes the heat conduction pole to transmit outside the insulating layer, and the heat conduction pole is connected with metal sheathing and can make the heat scatter and disappear through metal sheathing. The temperature inside the cable can be partially dissipated through the matching of the heat conducting core and the heat conducting rod, and further the damage of high temperature to the inside of the cable is prevented.

Description

Flexible fireproof cable

Technical Field

The utility model belongs to the technical field of wire and cable's technique and specifically relates to a flexible fireproof cable is related to.

Background

The main functions of the electric wire and cable are electric energy transmission, signal transmission and electromagnetic conversion, the electric wire and cable are classified into various types according to different functional cables, such as a power cable for transmitting electric power, an overhead line and the like, a coaxial cable for transmitting signals, an enameled wire for electromagnetic conversion and the like, the cable can be classified according to different use environments, and the flexible fireproof cable is mainly used for escape and rescue systems, fire monitoring, emergency lighting, some industrial fields and the like due to good high temperature resistance, good flexibility and the like.

Chinese patent with patent publication No. CN203503356U proposes a flexible fireproof cable, which comprises a conductive wire core, a fire-resistant insulating layer composed of synthetic mica tape is wrapped around the conductive wire core, a flame-retardant insulating layer made of fluorine-46 material is wrapped outside the fire-resistant insulating layer, a metal protective layer is sleeved outside the flame-retardant insulating layer, a heat-insulating flame-retardant layer composed of basalt fiber is wrapped outside the metal protective layer, and an outer sheath is wrapped outside the heat-insulating flame-retardant layer.

The above prior art solutions have the following drawbacks: the cable is when using in it the electric current that passes through big more, the heating power of copper core is also big more, and fire-resistant insulating layer is around wrapping outside the electric wire core, and fire-resistant insulating layer comprises synthetic mica tape, but because synthetic mica tape radiating effect is not good, so when the cable is worked for a long time in the electric current than great occasion, the temperature of cable copper core will be high more, and high temperature can be flooded inside synthetic mica tape in addition, and the high temperature has the possibility of the inside damage of cable.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flexible fireproof cable, the inside temperature of cable scatters and disappears easily, and then can protect the cable inner structure.

The utility model discloses a can realize through following technical scheme:

the utility model provides a flexible fireproof cable, includes by interior copper core, insulating layer, middle filling layer and the metal sheath who sets gradually outside to, the copper core sets up to many, the insulating layer adopts synthetic mica tape, the inside grafting of insulating layer has the heat conduction core, heat conduction core perisporium has set firmly a plurality of heat conduction poles, the heat conduction pole dorsad heat conduction core one end is passed in proper order the insulating layer with behind the middle filling layer with the metal sheath is connected.

Through adopting above-mentioned technical scheme, the cable can produce a large amount of heats in the copper core when the great occasion of electric current of continuous work, and the heat around the copper core can transmit for the heat conduction core this moment, then utilizes the heat conduction pole to transmit outside the insulating layer, and the heat conduction pole is connected with metal sheathing and can make the heat scatter and disappear through metal sheathing. The temperature inside the cable can be partially dissipated through the matching of the heat conducting core and the heat conducting rod, and further the damage of high temperature to the inside of the cable is prevented.

Further setting the following steps: the heat conducting rod is characterized in that a heat insulation sleeve is sleeved on the outer wall of the heat conducting rod between the insulating layer and the heat conducting core, and two ends of the heat insulation sleeve are fixedly connected with the insulating layer and the heat conducting core respectively.

Through adopting above-mentioned technical scheme, the radiation shield makes mutual isolation between heat conduction pole and the copper core, and then prevents that the temperature on the heat conduction pole from transmitting to the copper core again when outside transmission heat, is favorable to scattering and disappearing of temperature.

Further setting the following steps: and the copper cores are uniformly distributed on the peripheral wall of the heat conducting core around the axis of the heat conducting core.

Through adopting above-mentioned technical scheme, copper core evenly distributed makes every copper core can both contact with heat conduction core, makes heat transfer efficiency higher.

Further setting the following steps: and a heat insulation layer is arranged between the insulation layer and the copper core.

Through adopting above-mentioned technical scheme, synthetic mica tape can become when continuously receiving high temperature and be the powder and drop, and its effect will lose efficacy this moment, and the insulating layer can separation heat, makes the heat be difficult for transmitting to the insulating layer.

Further setting the following steps: the inner wall of the metal sheath is provided with a splicing hole, and the heat conducting rod penetrates through the middle filling layer and then is inserted into the splicing hole in a close fit manner.

Through adopting above-mentioned technical scheme, the heat conduction pole is pegged graft in the spliced eye, can make and dismantle easily between metal sheath and the heat conduction pole.

Further setting the following steps: the metal sheath is wrapped with an outer sheath which is made of low-smoke non-toxic plastic materials.

By adopting the technical scheme, the low-smoke non-toxic plastic material has better corrosion resistance, and can be coated outside the metal sheath to protect the metal sheath.

Further setting the following steps: the heat insulation layer is made of glass fiber.

Through adopting above-mentioned technical scheme, glass fiber flexibility is better, and then can not influence the holistic flexibility of cable.

Further setting the following steps: the middle filling layer is made of glass fiber.

Through adopting above-mentioned technical scheme, glass fiber heat-proof quality is better, and when the cable outside because of being burnt temperature sharply risees, glass fiber can make the difficult transmission of heat to the insulating layer on the metal sheath, and then can protect the insulating layer.

To sum up, the utility model discloses a beneficial technological effect does:

(1) when the temperature in the cable is too high due to too large current, the temperature of the copper core of the cable is intensively transferred to the heat conducting core, then the temperature of the heat conducting core is transferred to the metal sheath through the heat conducting rod, and the temperature is dissipated through the metal sheath;

(2) the middle filling layer and the heat insulation layer can respectively stop the temperature inside and outside the insulation layer, and the insulation layer can be protected from being influenced by high temperature.

Drawings

Fig. 1 is a schematic diagram of the internal structure of the present invention.

Reference numerals: 1. a copper core; 2. an insulating layer; 3. an intermediate filling layer; 4. a metal sheath; 5. an outer sheath; 6. a heat conducting core; 7. a thermal insulation layer; 8. a heat conducting rod; 9. inserting holes; 10. a heat insulation sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a flexible fireproof cable, including many copper core 1, many copper core 1 outside by interior cladding in proper order outside has insulating layer 2, middle filling layer 3 and metal sheath 4. Wherein, the insulating layer 2 adopts synthetic mica tape, and the middle filling layer 3 adopts glass fiber. The glass fiber has good heat insulation performance and good flexibility. The metal sheath 4 is wrapped by the outer sheath 5, the outer sheath 5 is made of low-smoke non-toxic plastic materials, and the low-smoke non-toxic plastic materials have corrosion resistance, so that the metal sheath 4 can be protected, and the metal sheath 4 is prevented from rusting.

Referring to fig. 1, a heat conducting core 6 is inserted into the insulating layer 2 along the direction of the copper core 1, and the copper core 1 is uniformly distributed on the peripheral wall of the heat conducting core 6 around the axis of the heat conducting core 6. The copper cores 1 are uniformly wound on the peripheral wall of the heat conducting core 6, so that each copper core 1 is in contact with the heat conducting core 6, and heat is transferred to the heat conducting core 6. Be provided with insulating layer 7 between insulating layer 2 and the copper core 1, glass fiber is adopted to the material of insulating layer 7, and glass fiber's thermal-insulated effect is better, when the copper core 1 generates heat excessively, insulating layer 7 can make the difficult transmission of heat to insulating layer 2, and then can protect insulating layer 2.

The perisporium of heat conduction core 6 is provided with a plurality of heat transfer pieces along the 6 trends of heat conduction core, and the heat transfer piece is including setting firmly three heat conduction rods 8 in 6 outer walls of heat conduction core, and heat conduction rod 8 is around 6 equiangular distributions of axis of heat conduction core on 6 perisporium of heat conduction core and 8 length direction of heat conduction rods are perpendicular with 6 axes of heat conduction core. The end of the heat conducting rod 8 far away from the heat conducting core 6 extends towards the metal sheath 4 and sequentially penetrates through the heat insulating layer 7 and the insulating layer 2 to be connected with the metal sheath 4. The inner wall of the metal sheath 4 is provided with a splicing hole 9 at the position opposite to the heat conducting rod 8, and one end of the heat conducting rod 8 far away from the heat conducting core 6 is tightly matched and spliced in the splicing hole 9. The heat conducting rod 8 and the heat conducting core 6 are both made of heat conducting insulating elastic rubber. The heat on the copper core 1 can be transferred to the heat conducting core 6, and the heat conducting core 6 can transfer the heat to the metal sheath 4 through the heat conducting rod 8, so that the heat can be transferred to the outside. The end part of the heat conducting rod 8 is inserted in the inserting hole 9, so that the metal sheath 4 and the heat conducting rod 8 can be conveniently separated. The outer wall of the heat conducting rod 8 between the insulating layer 2 and the heat conducting core 6 is sleeved with a heat insulating sleeve 10, and two ends of the heat insulating sleeve 10 are fixedly connected with the insulating layer 2 and the heat conducting core 6 respectively. The heat-insulating sleeve 10 can isolate the heat-conducting rod 8 from the copper core 1, and when the heat-conducting rod 8 transfers heat, the heat is not easy to be transferred into the copper core 1 again, which is beneficial to heat dissipation.

The implementation principle and the beneficial effects of the embodiment are as follows:

cable during operation, if the electric current lasts when too big, the heating power of copper core 1 will be very big, and the temperature ratio of copper core 1 this moment is higher, and the temperature of copper core 1 will transmit very easily to heat conduction core 6 on, after copper core 1 transmits the heat to heat conduction core 6, heat conduction core 6 again with heat transfer to heat conduction pole 8, and the radiation shield 10 separates heat conduction pole 8 and copper core 1 this moment, prevents that heat conduction pole 8 from transmitting heat to copper core 1 again when transmitting the heat. The heat conducting rod 8 transfers heat to the metal sheath 4, and dissipates the heat via the metal sheath 4. The insulating layer 2 both sides all are provided with middle filling layer 3 and insulating layer 7, prevent that the heat transfer from to insulating layer 2.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a flexible fireproof cable, includes by copper core (1), insulating layer (2), middle filling layer (3) and metal sheath (4) that inside to outside set gradually, copper core (1) sets up to many, its characterized in that: the insulating layer (2) adopts synthetic mica tape, heat conduction core (6) is inserted in the insulating layer (2), a plurality of heat conduction rods (8) are fixedly arranged on the peripheral wall of the heat conduction core (6), and one ends of the heat conduction rods (8) back to the heat conduction core (6) sequentially penetrate through the insulating layer (2) and the middle filling layer (3) and then are connected with the metal sheath (4).

2. The flexible fire-protected cable of claim 1, wherein: the heat conducting rod (8) is characterized in that a heat insulating sleeve (10) is sleeved on the outer wall of the heat conducting rod between the insulating layer (2) and the heat conducting core (6), and two ends of the heat insulating sleeve (10) are fixedly connected with the insulating layer (2) and the heat conducting core (6) respectively.

3. A flexible fire-resistant cable according to claim 2, wherein: and the copper cores (1) are uniformly distributed on the peripheral wall of the heat conducting core (6) around the axis of the heat conducting core (6).

4. A flexible fire-resistant cable according to claim 2, wherein: and a heat insulation layer (7) is arranged between the insulation layer (2) and the copper core (1).

5. The flexible fire-protected cable of claim 1, wherein: the inner wall of the metal sheath (4) is provided with a splicing hole (9), and the heat conducting rod (8) penetrates through the middle filling layer (3) and then is inserted into the splicing hole (9) in a close fit manner.

6. The flexible fire-protected cable of claim 1, wherein: an outer sheath (5) is coated outside the metal sheath (4), and the outer sheath (5) is made of low-smoke non-toxic plastic materials.

7. The flexible fire-protected cable of claim 4, wherein: the heat insulation layer (7) is made of glass fiber.

8. The flexible fire-protected cable of claim 1, wherein: the middle filling layer (3) is made of glass fiber.