CN102394148A - Method for manufacturing stranded and non-armored full dry type optical fiber composite optical cable with single protection layer - Google Patents

Abstract

The invention discloses a method for manufacturing a stranded and non-armored full dry type optical fiber composite optical cable with a single protection layer. A full dry type light unit (which is stranded), leads and filling wires cladding an insulating layer, and the like are wrapped with a thermal insulation band externally after being stranded; some dry water resisting material can be added in the gap of a cable core for ensuring the roundness and the water preventing effect of the cable core; and an outer sheath is extruded finally, and a lead insulating layer, fillers, the outer protection layer are made of inflaming retarding material such as PVC (polyvinyl chloride) or LSAH (Low Smoke Zero Halogen). Simultaneously, the light unit is stranded, and adopts an all dry structure of a loose sleeve, namely, the interior of the sleeve or the cable core adopts dry water-resisting material to realize the functions of preventing water and blocking moisture with the full section.

Description

The manufacture method of the absolutely dry type Optical Fiber Composite of the non-armouring of layer-twisted type list sheath optical cable

Technical field

The application relates to the manufacture method of the absolutely dry type Optical Fiber Composite of a kind of non-armouring of layer-twisted type list sheath optical cable.

Background technology

Along with national intelligent grid strategy requirements on Construction, national grid will carry out the intelligent grid construction in China.Intelligent grid is to be that the strong rack of key rack, electric network coordination at different levels development is the basis with extra-high voltage grid; With communication information platform is support; Have informationization, automation, interactive characteristic; The generating, transmission of electricity, power transformation, distribution, electricity consumption and the scheduling six big links that comprise electric power system; Cover all electric pressures, realize that many nets of " flow of power, information flow, Business Stream " merge, have the modern power network of strong reliable, economical and efficient, clean environment firendly, transparent opening and friendly interactive intension.Medium and high pressure section cable in the market; Utilize OPGW or ADSS and existing electrical lead to constitute the notion that many nets merge, and at middle pressure and low pressure stage, when promptly perhaps the user inserts in the metropolitan area network; Consider the city look and feel construction requirements; The cable system of laying is often underground by transferring on the road, and just pipeline and direct-buried mode become more general, the optical fiber that therefore will transmit information and electrical lead permeate bar Optical Fiber Composite cable will become intelligent grid build in the main force of middle pressure and low pressure stage.

The light unit adopts loose sleeve pipe dry type structure in the dry type Optical Fiber Composite cable newly developed, and just the interior perhaps cable core of sleeve pipe adopts the dry type material water-proof material to realize the effect of total cross-section waterproof retaining tide.This invention is mainly used in 10kV and the following power distribution network thereof, and system of laying is main with direct-burried or pipeline, and its major advantage is following:

(1) realizes the effect that blocks water because of light unit total cross-section adopts the dry type material water-proof material, do not have the vertical drip problem of ointment, so can effectively protect light unit total length section to block water in section or the vertical wirings significantly at drop;

(2) fill because of no ointment in the light unit, so such Optical Fiber Composite cable has better fire resistance;

(3) because of optical fiber by bale breaking the cover in; Be bound in the tight sleeve layer unlike the same optical fiber of tight sleeve optic cable; Therefore in broad temperature range, have the little characteristics of decay, be particularly suitable for long application apart from optical branching device in intermediate pressure section line construction and the low pressure stage circuit.

Summary of the invention

In structured design process, focus on the protection that the structural shape and the light unit of power cable are pressed in consideration.Consider cable long-term work temperature, the light unit can adopt high temperature resistant fine cream, high-temperature resistant optical fiber, or takes certain separator to guarantee the stable of Optical Fiber Transmission performance.

According to the networking requirement of this cable, dry type light unit can adopt layer-twisted type structured light unit;

According to the cable laying demand, the oversheath form can adopt the non-armouring type of single sheath;

The manufacture method of the application's layer-twisted type is absolutely dry type Optical Fiber Composite optical cable is following:

(1) the preparation conductor adopts single copper cash as conductor, is coated with insulating barrier in the periphery of conductor, and three conductors are as a conductor element;

(2) preparation one layer-twisted type light unit installs to some optical fiber on the pay off rack, adjusts unwrapping wire and stretches power, and unwrapping wire is stretched power at 40～100g;

(3) some optical fiber are drawn according to assigned direction, and be incorporated into plastic extruding machine, outside optical fiber, extrude and coated loose sleeve pipe, in the loose sleeve pipe of extruding, inject the dry type water-blocking material simultaneously, the injection rate of dry type water-blocking material is to send 92%～98% of cannula cavity cross section;

(4) reinforcement of processing by nonmetallic materials, it is parallel with the optical fiber that four loose sleeve pipes coat to be wire, and is positioned at layer-twisted type light unit center, to strengthen support force and tensile strength;

(5) with gasket for packing, the optical fiber and the non-metal reinforcement member of four loose sleeve pipe coatings coat waterstop and sheath outward successively, gasket for packing, and the slit that exists between the optical fiber of four loose sleeve pipe coatings and the non-metal reinforcement member is by the water blocking yarn filling;

(6) conductor element and a layer-twisted type light unit of three conductors being formed form cable core; Cable core is carried out optical fiber attenuation, surplus long the detection; The detection back that finishes is stranded and coat heat insulating belt and oversheath successively through stranding; And increase the dry type water-blocking material in the cable core gap, close and block-water effect to guarantee the cable core rounding.

Wherein, wire insulation, filler and outer jacket adopt fire proofing.

Wherein, fire proofing is PVC or LSZH.

The light unit of the composite rope of being designed and developed by said method has adopted the dry type structure, just in loose sleeve pipe and the cable core gap adopt the dry type material water-proof material to realize that total cross-section blocks water, the overall optical unit is nonmetal full dielectric structure.Because whole optical fiber composite cable has adopted outstanding raw material of performance and relatively more suitable structure; Therefore; Not only the light unit has the characteristics of heat insulation preferably, resistance to compression and tension, and whole cable has electric property and optical property preferably, satisfies the demand that intelligent grid is built fully.

Description of drawings

Fig. 1 composite rope cross-sectional view

Fig. 2 light cell cross-section figure

Fig. 3 is a method flow diagram

Wherein,

The 11-conductor

The 12-insulating barrier

13-light unit

The 14-heat insulating belt

The 15-oversheath

B1-light unit sheath

The B2-waterstop

B3-pine sleeve pipe

B4-dry type water-blocking material

B5-optical fiber

The B6-water blocking yarn

The B7-non-metal reinforcement member

The B8-gasket for packing

Embodiment

With reference to Fig. 1; 2 composite rope structure and the method flow diagram of Fig. 3; The manufacture method of the absolutely dry type Optical Fiber Composite of the non-armouring of the application's layer-twisted type list sheath optical cable is following: (1) preparation conductor; Adopt single copper cash as conductor, be coated with insulating barrier in the periphery of conductor, three conductors are as a conductor element; (2) preparation one layer-twisted type light unit installs to some optical fiber on the pay off rack, adjusts unwrapping wire and stretches power, and unwrapping wire is stretched power at 40～100g; (3) some optical fiber are drawn according to assigned direction, and be incorporated into plastic extruding machine, outside optical fiber, extrude and coated loose sleeve pipe, in the loose sleeve pipe of extruding, inject the dry type water-blocking material simultaneously, the injection rate of dry type water-blocking material is to send 92%～98% of cannula cavity cross section; (4) reinforcement of processing by nonmetallic materials, it is parallel with the optical fiber that four loose sleeve pipes coat to be wire, and is positioned at layer-twisted type light unit center, to strengthen support force and tensile strength; (5) with gasket for packing, the optical fiber and the non-metal reinforcement member of four loose sleeve pipe coatings coat waterstop and sheath outward successively, gasket for packing, and the slit that exists between the optical fiber of four loose sleeve pipe coatings and the non-metal reinforcement member is by the water blocking yarn filling; (6) conductor element and a layer-twisted type light unit of three conductors being formed form cable core; Cable core is carried out optical fiber attenuation, surplus long the detection; The detection back that finishes is stranded and coat heat insulating belt and oversheath successively through stranding; And increase the dry type water-blocking material in the cable core gap, close and block-water effect to guarantee the cable core rounding.Wherein, wire insulation, filler and outer jacket adopt fire proofing.Wherein, fire proofing is PVC or LSZH.

Exploitation through new construction; Designed a kind of dry type Optical Fiber Composite cable; For middle pressure and low pressure stage in the intelligent grid construction provide a kind of brand-new product; Also solved the drawback that ointment filled type light unit exists in the vertical wirings application process, optical fiber and power conductor are gathered and in same cable, have also been practiced thrift construction cost in the Optical Fiber Composite low-voltage cable, and have alleviated the deficient circumstances of conduit resource to a certain extent.

Thereby reached following effect:

1, the telecommunication management of pressure and low pressure stage in solving in the intelligent grid is that four net fusions are laid a good foundation;

2, avoid the wiring that repeats of optical cable and cable, practice thrift construction cost;

3, avoid the vertical drip problem of ointment in the ointment filled type structure, guaranteed the wet requirement of the moistureproof retaining of light unit total length section.

4, because of not using ointment, so have the good flame performance.

5, because of optical fiber by bale breaking the cover in; Be bound in the tight sleeve layer unlike the same optical fiber of tight sleeve optic cable; Therefore in broad temperature range, have the little characteristics of decay, be particularly suitable for long application apart from optical branching device in intermediate pressure section line construction and the low pressure stage circuit.

Claims (3)

1. the manufacture method of the absolutely dry type Optical Fiber Composite of the non-armouring of a layer-twisted type list sheath optical cable is characterized in that this method may further comprise the steps:

(1) the preparation conductor adopts single copper cash as conductor, is coated with insulating barrier in the periphery of conductor, and with the transmission performance of raising conductor, three conductors are as a conductor element;

(2) preparation layer-twisted type light unit installs to some optical fiber on the pay off rack, adjusts unwrapping wire and stretches power, and unwrapping wire is stretched power at 40～100g;

(3) some optical fiber are drawn according to assigned direction, and be incorporated into plastic extruding machine, outside optical fiber, extrude and coated loose sleeve pipe, in the loose sleeve pipe of extruding, inject the dry type water-blocking material simultaneously, the injection rate of dry type water-blocking material is to send 92%～98% of cannula cavity cross section;

(4) reinforcement of processing by nonmetallic materials, it is parallel with the optical fiber that four loose sleeve pipes coat to be wire, and is positioned at layer-twisted type light unit center, to strengthen support force and tensile strength;

(5) with gasket for packing, the optical fiber and the non-metal reinforcement member of four loose sleeve pipe coatings coat waterstop and sheath outward successively, gasket for packing, and the slit that exists between the optical fiber of four loose sleeve pipe coatings and the non-metal reinforcement member is by the water blocking yarn filling;

(6) conductor element and a layer-twisted type light unit of three conductors being formed form cable core; Cable core is carried out optical fiber attenuation, surplus long the detection; The detection back that finishes is stranded and coat heat insulating belt and oversheath successively through stranding; And increase the dry type water-blocking material in the cable core gap, close and block-water effect to guarantee the cable core rounding.

2. manufacture method as claimed in claim 1 is characterized in that: wherein, wire insulation, filler and outer jacket adopt fire proofing.

3. manufacture method as claimed in claim 2 is characterized in that: wherein, fire proofing is PVC or LSZH.

Images