CN202693882U

CN202693882U - Nonmetal fire-resistant cable

Info

Publication number: CN202693882U
Application number: CN 201220374961
Authority: CN
Inventors: 刘延华; 毛文沛
Original assignee: JIANGSU HITEKER CO Ltd
Current assignee: JIANGSU HITEKER CO Ltd
Priority date: 2012-08-01
Filing date: 2012-08-01
Publication date: 2013-01-23
Anticipated expiration: 2022-08-01

Abstract

The utility model discloses a nonmetal fire-resistant cable which comprises a cable core, and is characterized in that a ceramic fire-resistant composite belt is wrapped outside the cable core; a halogen-free low smoke inflaming retarding polyolefin inner sheath is extruded outside the ceramic fire-resistant composite belt; a second ceramic fire-resistant composite belt is wrapped outside the halogen-free low smoke inflaming retarding polyolefin inner sheath; and a halogen-free low smoke inflaming retarding polyolefin outer sheath is extruded outside the second ceramic fire-resistant composite belt. The ceramic fire-resistant composite belt is lapped and the halogen-free low smoke inflaming retarding polyolefin inner sheath and the halogen-free low smoke inflaming retarding polyolefin outer sheath are extruded, the nonmetal fire-resistant cable provided by the utility model has the advantages of reasonable structure design, stable optical performance, good mechanical and physical properties and fire-resistant performance, low manufacture cost and simple manufacture process.

Description

Nonmetal flame-proof cable

Technical field

The utility model relates to a kind of flame-proof cable, especially relates to a kind of nonmetal flame-proof cable, belongs to the optical fiber cable field.

Background technology

Flame-proof cable mainly is comprised of light unit, metal reinforcement, metal armouring, glass tape or Mica tape, halogen-free and low-smoke flame-retardant polyolefin sheathed etc. at present; utilize especially metal reinforcement, tinsel or metal tape bag to carry out the optical cable endothecium structure; play the effect that flame burns away to inside that intercepts; and utilize halogen-free and low-smoke flame-retardant polyolefin sheathed effect at the high temperature absorbing heat; are not damaged when burning in protection optical cable endothecium structure and light unit; make flame-proof cable after the burning of high temperature a period of time, still can keep good optical property.Because metallic optical cable easily produces induction current in electric system when destroying optical cable, power line short-circuit and thunderbolt, and is all dangerous to optical cable, equipment and the person, so the flame-proof cable that lays of interior of building, need to adopt nonmetallic flame-proof cable.

The fire-resistant composite band of ceramic---be to be composited by ceramic fireproof＝fire-proof silicon rubber and the calendering of high temperature resistance glass fiber cloth; under 300 ℃ and above flame condition, begin hardening; reach as high as 3000 ℃; along with temperature raises, by the hard complete housing of Low fire ceramic shape, the ablation time is longer rapidly; temperature is higher; harder, as to produce after the burning hard housing can both play preferably protective effect to optical cable inside after combustion process and burning.

The utility model content

Technical problem to be solved in the utility model provides a kind of nonmetal flame-proof cable, has the performances such as good physical mechanical, counter-bending, fire-resistant burning, low cost of manufacture.

In order to reach above-mentioned technical purpose, the technical solution adopted in the utility model is: a kind of nonmetal flame-proof cable, comprise cable core, and it is characterized in that: described cable core is surrounded with the fire-resistant composite band of ceramic outward.

The fire-resistant composite band of described ceramic is squeezed one deck halogen-free and low-smoke flame-retardant polyolefin inner sheath outward.

The outer fire-resistant composite band of wrapped second layer ceramic of described halogen-free and low-smoke flame-retardant polyolefin inner sheath.

The fire-resistant composite band of described second layer ceramic is squeezed one deck halogen-free and low-smoke flame-retardant polyolefin oversheath outward.

It is a loose sleeve pipe that is surrounded by multifiber and fine cream that tubular type cable core centered by the described cable core, described central tubular cable core set gradually from inside to outside, the FRP reinforcement of the vertical bag of one deck, and each places two water blocking yarns at least inside and outside the FRP reinforcement of described vertical bag.

Described cable core is the layer-twisted type cable core, and described layer-twisted type cable core is by the many loose sleeve pipes that contain multifiber and fine cream, around circular stranded the forming of PRF reinforcement.

Also stranded in the described layer-twisted type cable core have a filling plastic rope.

The stranded mode of described layer-twisted type cable core is that simple helix or SZ are spiral, and two water blocking yarns are placed in the gap at least.

Beneficial effect: nonmetal flame-proof cable of the present utility model, adopt two layers of fire-resistant composite band of wrapped ceramic, play the combustion of good obstruct flame around with heat to the optical cable core transmission, particularly the fire-resistant composite band of ceramic begins hardening under 300 ℃ to 1000 ℃ flame conditions,, complete housing hard by the Low fire ceramic shape plays preferably protective effect to the optical cable inner structure rapidly; Adopt simultaneously oversheath in two layers of halogen-free and low-smoke flame-retardant polyolefin, can fire around the part heat that produces by the extinction cable, reduce optical cable internal temperature ascending velocity.After taking abovementioned technology, can make flame-proof cable in 1000 ℃ of fire testings and following maintenance 90 minutes and naturally cold going in the process, optical fiber communication is unaffected; Have the performances such as good physical mechanical, counter-bending, fire-resistant burning, low cost of manufacture, being applicable to indoor and outdoor fixedly lays, can be widely used in industry heavy construction and the engineering construction projects such as communication, network, electric power, in many nets fusion in future, intelligent grid, intelligent building, have very widely application prospect, and can bring good Social benefit and economic benefit.

Description of drawings

Accompanying drawing 1 is the nonmetal flame-proof cable structural representation of central tubular cable core in the utility model;

Accompanying drawing 2 is the nonmetal flame-proof cable structural representation of layer-twisted type cable core in the utility model.

Wherein: 1 cable core; The fire-resistant composite band of 2 ceramics; 3 halogen-free and low-smoke flame-retardant polyolefin inner sheaths; The fire-resistant composite band of 4 second layer ceramics; 5 halogen-free and low-smoke flame-retardant polyolefin oversheaths; 6 silicon rubber sheaths; 101 optical fiber; 102 fine cream; 103 loose sleeve pipes; 104 FRP reinforcements; 105 water blocking yarns; 106 gasket for packings.

Embodiment

Below in conjunction with accompanying drawing and instantiation the utility model is further described.

Embodiment 1

As shown in Figure 1, a kind of nonmetal flame-proof cable of central tubular, tubular type cable core centered by the cable core 1, its central tubular cable core comprises: a center is the loose sleeve pipe 103 that comprises multifiber 101, fine cream 102, the FRP reinforcement 104 of the vertical bag in the outside, each places two water blocking yarns 105 at least the inside and outside side clearance of the FRP reinforcement 104 of vertical bag; The outer successively fire-resistant composite band 2 of wrapped ceramic of cable core 1, extrude halogen-free and low-smoke flame-retardant polyolefin inner sheath 3, the fire-resistant composite band 4 of wrapped second layer ceramic, extrude halogen-free and low-smoke flame-retardant polyolefin oversheath 5.

Embodiment 2

As shown in Figure 2, a kind of nonmetal flame-proof cable of layer-twisted type, cable core 1 is the layer-twisted type cable core, its layer-twisted type cable core comprises: the center is 104 1 of circular reinforcement FRP, 103 3 of the loose sleeve pipes of every optical fiber 101 that contains four-core and fine cream 102 are placed in the outside, 106 3 of gasket for packings, 105 at least two of water blocking yarns, the stranded mode of layer-twisted type cable core is that simple helix or SZ are spiral; The outer successively fire-resistant composite band 2 of wrapped ceramic of cable core 1, extrude halogen-free and low-smoke flame-retardant polyolefin inner sheath 3, the fire-resistant composite band 4 of wrapped second layer ceramic, extrude halogen-free and low-smoke flame-retardant polyolefin oversheath 5.

Facts have proved nonmetal flame-proof cable of the present utility model, the fire-resistant composite band of wrapped ceramic, extrude oversheath in the halogen-free and low-smoke flame-retardant polyolefin, reasonable in design, optical property are stable, and mechanical-physical and fire performance are good, and low cost of manufacture, manufacturing process are simple.

Below disclose the utility model with preferred embodiment, so it is not to limit the utility model, and all employings are equal to replaces or technical scheme that the equivalent transformation mode obtains, all drops within the protection domain of the present utility model.

Claims

1. a nonmetal flame-proof cable comprises cable core, it is characterized in that: described cable core is surrounded with the fire-resistant composite band of ceramic outward.

2. nonmetal flame-proof cable according to claim 1 is characterized in that: the fire-resistant composite band of described ceramic is squeezed one deck halogen-free and low-smoke flame-retardant polyolefin inner sheath outward.

3. nonmetal flame-proof cable according to claim 2 is characterized in that: the outer fire-resistant composite band of wrapped second layer ceramic of described halogen-free and low-smoke flame-retardant polyolefin inner sheath.

4. nonmetal flame-proof cable according to claim 3 is characterized in that: the fire-resistant composite band of described second layer ceramic is squeezed one deck halogen-free and low-smoke flame-retardant polyolefin oversheath outward.

5. each described nonmetal flame-proof cable according to claim 1-4, it is characterized in that: tubular type cable core centered by the described cable core, it is a loose sleeve pipe that is surrounded by multifiber and fine cream that described central tubular cable core sets gradually from inside to outside, the FRP reinforcement of the vertical bag of one deck, each places two water blocking yarns at least inside and outside the FRP reinforcement of described vertical bag.

6. each described nonmetal flame-proof cable according to claim 1-4, it is characterized in that: described cable core is the layer-twisted type cable core, described layer-twisted type cable core is by the many loose sleeve pipes that contain multifiber and fine cream, around circular stranded the forming of PRF reinforcement.

7. nonmetal flame-proof cable according to claim 6 is characterized in that: also stranded in the described layer-twisted type cable core have a filling plastic rope.

8. nonmetal flame-proof cable according to claim 6, it is characterized in that: the stranded mode of described layer-twisted type cable core is that simple helix or SZ are spiral, and two water blocking yarns are placed in the gap at least.