CN113851264A

CN113851264A - Novel fire prevention low smoke and zero halogen cable

Info

Publication number: CN113851264A
Application number: CN202111083251.7A
Authority: CN
Inventors: 孙中奇
Original assignee: Shanghai Changshun Elevator Cable Co ltd
Current assignee: Shanghai Changshun Elevator Cable Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2021-12-28

Abstract

The utility model belongs to the technical field of the cable technique and specifically relates to a novel fire prevention low smoke and zero halogen cable is related to, including oversheath layer, a plurality of setting at the intraformational sinle silk of oversheath, be provided with the band layer that is used for suppressing flame to sinle silk direction propagation between sinle silk and the oversheath layer, the outside parcel of sinle silk has the flame retardant coating, the outside parcel of flame retardant coating has the insulating layer, and this application has that the cable is fire prevention effect is good, not fragile effect.

Description

Novel fire prevention low smoke and zero halogen cable

Technical Field

The application relates to the technical field of cables, in particular to a novel fireproof low-smoke halogen-free cable.

Background

The elevator cable is a daily-seen electric wire cable, the cable is commonly used on a high-rise elevator, a plurality of cables are often centralized and bound together, and under the condition of electrification, the current ratio of the cable used by the elevator is higher, so that the cable has higher requirements on heat dissipation, particularly fire resistance, of the cable under the use condition.

The cable with fireproof performance is also a basic requirement of the power industry on the used cable, and the conventional common cables have basic fireproof performance and are all made of flame retardant materials by replacing the outer sheaths of the cables.

In view of the above-mentioned related art, the inventor believes that the existing cable has insufficient fireproof performance, and although the adjacent cables can be effectively prevented from burning, the core wrapped in the flame-retardant outer sheath is easily burnt in case of fire, thereby causing serious loss.

Disclosure of Invention

In order to further promote the fire behavior of cable, reduce the loss, this application provides a novel fire prevention low smoke and zero halogen cable.

The application provides a pair of novel fire prevention low smoke and zero halogen cable adopts following technical scheme:

the utility model provides a novel fire prevention low smoke and zero halogen cable, includes oversheath layer, the setting of a plurality of at the intraformational sinle silk of oversheath, be provided with the band layer that is used for suppressing flame to sinle silk direction propagation between sinle silk and the oversheath layer, the outside parcel of sinle silk has the flame retardant coating, the outside parcel of flame retardant coating has the insulating layer.

Through adopting above-mentioned technical scheme, the effectual suppression flame of band layer is propagated to the direction of sinle silk to avoid the sinle silk to be burnt and lose, the flame retardant coating has further promoted the fire behavior of cable, and the insulating layer also has the insulating effect of fire prevention simultaneously, and the oversheath layer all plays good protection effect to sinle silk, band layer and insulating layer.

Optionally, the belting layer includes an inner belting near the core, an outer belting contacting with the outer jacket layer, and an inner protective layer arranged between the inner belting and the outer belting, the inner belting and the outer belting are both halogen-free ceramic flame-retardant belts, and the inner protective layer is made of flame-retardant polyolefin material.

Through adopting above-mentioned technical scheme, the material of inner bag area and outer band sets up to the fire-retardant material of pottery, and fire-retardant polyolefin can effectively isolated oxygen to restrain the propagation of flame.

Optionally, the outer sheath layer is made of a material which expands when exposed to fire, and a plurality of heat dissipation holes are formed in the outer wall of the outer sheath layer.

Through adopting above-mentioned technical scheme, when the cable met conflagration or high temperature, the oversheath layer is heated and expands to the inner chamber of compression louvre separates the both ends of louvre this moment, makes external oxygen be difficult to get into the inner chamber of oversheath, realizes the fire prevention effect.

Optionally, a flexible heat dissipation sleeve is arranged on the outer side of the outer wrapping belt, a flexible heat conduction frame is arranged between the flexible heat dissipation sleeve and the wire core, and the flexible heat conduction frame is in contact with the flexible heat dissipation sleeve and the insulation layer respectively.

Through adopting above-mentioned technical scheme, flexible heat conduction frame is equipped with heat conduction silica gel or silicon rubber material to make the cable flexible, because the silicon material has the heat conductivity, thereby can lead out the oversheath layer with the heat that the sinle silk gived off, make cable itself be difficult to produce high temperature.

Optionally, a pore formed among the inner wrapping tape, the insulating layer and the flexible heat conducting frame is filled with insulating and heat-insulating filler.

Through adopting above-mentioned technical scheme, insulating thermal-insulated material is ceramic fiber, and ceramic fiber has high temperature resistant insulating performance, through the mode of packing for be difficult to directly influence each other between the adjacent sinle silk, the heat that sinle silk itself produced passes through flexible heat conduction frame and transmits to the external world, thereby reaches radiating effect, and whole cable also is difficult to take place the burning.

Optionally, a plurality of radiating grooves are evenly formed in the outer wall of one side, far away from the wire core, of the flexible radiating sleeve at intervals, and the radiating grooves are arc-shaped grooves.

Through adopting above-mentioned technical scheme, be curved radiating groove and increased the heat radiating area of whole flexible heat dissipation cover, promoted the heat dispersion of whole cable.

Optionally, the wire core is formed by twisting a plurality of strands of annealed soft copper wires, and the fireproof layer is a mica tape wrapped on the outer side of the wire core.

Through adopting above-mentioned technical scheme for the compliance of cable itself is better, has promoted the convenience of cable transportation installation. The mica tape is a fire-resistant insulating material and has excellent high-temperature resistance and combustion resistance.

Optionally, the insulating layer is a cross-linked polyethylene material extruded outside the fire-proof layer.

By adopting the technical scheme, the cross-linked polyethylene material has better heat resistance and insulativity, the long-term working temperature of the cross-linked polyethylene can be increased to ninety ℃ and the endurable instantaneous short-circuit temperature can reach 170-250 ℃, so that the insulating layer is also difficult to be damaged, and the short circuit between adjacent wire cores is difficult to occur.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the wrapping tape layer effectively inhibits flame from spreading towards the wire core, so that the wire core is prevented from being burnt, the fireproof performance of the cable is further improved by the fireproof layer, meanwhile, the insulating layer also has a fireproof insulating effect, and the outer sheath layer has a good protection effect on the wire core, the wrapping tape layer and the insulating layer;

2. the fireproof performance is excellent.

Drawings

Fig. 1 is a schematic view of the entire structure part of the present embodiment.

Fig. 2 is a cross-sectional view of the cable in the present embodiment.

Fig. 3 is a schematic structural diagram for showing the overall structure of the flexible heat dissipation sleeve and the flexible heat conduction frame in the present embodiment.

Reference numerals: 1. an outer jacket layer; 2. a wire core; 3. a belting layer; 4. a fire barrier layer; 5. an insulating layer; 6. an inner wrapping belt; 7. an outer wrapping belt; 8. an inner protective layer; 9. heat dissipation holes; 10. a flexible heat dissipation sleeve; 11. a flexible heat conducting frame; 12. a heat dissipation groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses novel fire prevention low smoke and zero halogen cable.

Referring to fig. 1, a novel fireproof low-smoke halogen-free cable comprises an outer sheath layer 1, wherein the outer sheath layer 1 is made of an expanded rubber material, in the actual production process, the outer sheath layer 1 can be an integrally formed expanded rubber sleeve, a plurality of heat dissipation holes 9 are formed in the outer wall of the outer sheath layer 1 in a needle pricking mode, the heat dissipation holes 9 are communicated with the inner cavity of the outer sheath layer 1, and the heat dissipation holes 9 are uniformly distributed on the outer side of the outer sheath layer 1 at intervals; the outer sheath layer 1 can also be formed by weaving and wrapping a plurality of strips made of expanded rubber, and heat dissipation holes 9 are formed among the plurality of strips made of expanded rubber.

Referring to fig. 1 and 2, a flexible heat dissipation sleeve 10 is disposed on the inner side of the wire sleeve, the flexible heat dissipation sleeve 10 is generally made of silicon rubber, and since silicon itself has good heat conduction and dissipation performance, the flexible heat dissipation sleeve 10 dissipates heat from the inner cavity of the flexible heat dissipation sleeve 10 to the outside through a heat dissipation hole 9.

Referring to fig. 2, a belting layer 3 is disposed on the inner side of the flexible heat dissipation sleeve 10, and the belting layer 3 is mainly used for inhibiting flame from spreading towards the wire core 2. The belting layer 3 comprises an inner belting 6, an outer belting 7 and an inner protective layer 8, wherein the inner belting 6 and the outer belting 7 are halogen-free ceramic flame retardant materials with excellent fireproof performance. The inner protection layer 8 is located between the inner wrapping belt 6 and the outer wrapping belt 7, and the outer wrapping belt 7 is attached to the flexible heat dissipation sleeve 10. The inner sheath layer 8 is made of halogen-free low-smoke flame-retardant polyolefin material, so that oxygen is effectively isolated, and flame propagation is inhibited.

Referring to fig. 2, the number of the wire cores 2 is usually more than one, in this embodiment, three wire cores 2 are provided, and all three wire cores 2 are formed by twisting a plurality of annealed soft copper wires. The three wire cores 2 are uniformly distributed in the inner cavity of the inner wrapping belt 6 at intervals.

Referring to fig. 2, in order to further improve the fire-proof performance of the wire core 2, a fire-proof layer 4 is usually arranged outside the wire core 2, the fire-proof layer 4 is a mica tape wound outside the wire core 2 in a wrapping manner, and the mica tape is a fire-proof insulating material, so that the wire core 2 has excellent high-temperature resistance and combustibility.

Referring to fig. 2, the outside of flame retardant coating 4 is provided with one deck insulating layer 5, and insulating layer 5 is the cross-linked polyethylene material of crowded package outside flame retardant coating 4, and cross-linked polyethylene has stronger intensity and high temperature resistant insulating nature to make the situation of whole sinle silk 2 position difficult to take place the short circuit burning, promoted the security of cable use.

Referring to fig. 2 and 3, in order to further transmit the heat emitted from the core 2 to the outside, a flexible heat conducting frame 11 is disposed between the flexible heat dissipating sleeve 10 and the core 2, and the flexible heat conducting frame 11 is made of the same material as the flexible heat dissipating sleeve 10 and is made of silicon rubber. A plurality of radiating grooves 12 are uniformly formed in the outer side of the flexible radiating sleeve 10 at intervals, and the radiating grooves 12 increase the radiating area of the flexible radiating sleeve 10. One end of the flexible heat conducting frame 11 is connected with the insulating layer 5 on the outer side of the wire core 2, and the other end of the flexible heat conducting frame penetrates through the belting layer 3 and is integrally connected with the flexible heat dissipation sleeve 10. And simultaneously, insulating and heat-insulating filler is filled in the pores among the inner wrapping tape 6, the insulating layer 5 and the flexible heat conducting frame 11, and the insulating and heat-insulating material is ceramic fiber.

The implementation principle of the novel fireproof low-smoke halogen-free cable in the embodiment of the application is as follows: in the actual manufacturing process, a fire-proof layer 4 is formed on the outer side of the wire core 2 in advance in an extrusion wrapping mode, and an insulating layer 5 is formed on the outer side of the fire-proof layer 4. Then arrange flexible heat conduction frame 11 and flexible heat conduction cover around sinle silk 2, thereby make flexible heat conduction frame 11 keep away from the one end of flexible heat conduction cover and the insulating layer 5 department of meeting in the sinle silk 2 outside, and then the mode through spraying packing is at the outside spraying ceramic fiber of flexible heat conduction frame 11, in the spraying process, make the shower nozzle of spray gun around sinle silk 2 circumference at the uniform velocity spraying, and then the outside of ceramic fiber packing is through the required band layer 3 of the mode shaping of winding movement spraying or crowded package, final at the 3 outside shaping oversheath layers 1 of fashioned band layer.

When the outer sheath layer 1 is formed by weaving and wrapping, the heat dissipation holes 9 do not need to be formed in the outer side of the outer sheath layer 1 at the moment, and when the outer sheath layer 1 is formed by a winding spraying mode, a plurality of heat dissipation holes 9 are formed in the outer side of the outer sheath layer 1 in a follow-up needle pricking mode.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a novel fire prevention low smoke and zero halogen cable, includes oversheath layer (1), sinle silk (2) of a plurality of setting in oversheath layer (1), its characterized in that: be provided with between sinle silk (2) and oversheath layer (1) and be used for inhibiting the band layer (3) that flame propagated to sinle silk (2) direction, the outside parcel of sinle silk (2) has flame retardant coating (4), the outside parcel of flame retardant coating (4) has insulating layer (5).

2. A novel fire-proof low smoke zero halogen cable according to claim 1, characterized in that: the wrapping tape layer (3) comprises an inner wrapping tape (6) close to the wire core (2), an outer wrapping tape (7) contacted with the outer sheath layer (1), and an inner protective layer (8) arranged between the inner wrapping tape (6) and the outer wrapping tape (7), wherein the inner wrapping tape (6) and the outer wrapping tape (7) are halogen-free ceramic flame-retardant tapes, and the inner protective layer (8) is made of a flame-retardant polyolefin material.

3. A novel fire-proof low smoke zero halogen cable according to claim 2, characterized in that: the material of oversheath layer (1) is the material that meets fire inflation, the shaping has a plurality of louvre (9) on the outer wall of oversheath layer (1).

4. A novel fire-proof low smoke zero halogen cable according to claim 3, characterized in that: the flexible heat dissipation device is characterized in that a flexible heat dissipation sleeve (10) is arranged on the outer side of the outer wrapping tape (7), a flexible heat conduction frame (11) is arranged between the flexible heat dissipation sleeve (10) and the wire core (2), and the flexible heat conduction frame (11) is respectively in contact with the flexible heat dissipation sleeve (10) and the insulating layer (5).

5. A novel fire-proof low smoke zero halogen cable according to claim 4, characterized in that: and insulating and heat-insulating filler is filled in a pore formed among the inner wrapping tape (6), the insulating layer (5) and the flexible heat conducting frame (11).

6. A novel fire-proof low smoke zero halogen cable according to claim 4, characterized in that: a plurality of radiating grooves (12) are evenly arranged on the outer wall of one side, far away from the wire core (2), of the flexible radiating sleeve (10) at intervals, and the radiating grooves (12) are arc-shaped grooves.

7. A novel fire-proof low smoke zero halogen cable according to claim 1, characterized in that: the cable core (2) is formed by twisting a plurality of strands of annealed soft copper wires, and the fireproof layer (4) is a mica tape wrapped on the outer side of the cable core (2).

8. A novel fire-proof low smoke zero halogen cable according to claim 1, characterized in that: the insulating layer (5) is made of cross-linked polyethylene material extruded on the outer side of the fireproof layer (4).