CN107024748A - Layer-stranding cable and preparation method - Google Patents

Abstract

The invention belongs to technical field of cables, it is related to layer-stranding cable, include cable core and restrictive coating, it is characterized in that fixed bed, the packed layer outside fixed bed that the cable core is lived by centrally located reinforcer, around the stranded Loose tube of reinforcer, by all Loose tube integral coatings are constituted, the Loose tube of arbitrary neighborhood is mutually nontangential two-by-two, and the spacing maximum between adjacent Loose tube is 0.2mm, fixed bed is extend into the internal clearance of Loose tube formation, all has at least one optical fiber in every Loose tube；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).Present invention further teaches the preparation method of layer-stranding cable.The present invention have it is simple in construction, be easy to make, it is more cost-effective, temperature becomes stable optical performance after wide scope becomes, and the machinery equipment used is simple, less investment；Block-water effect is excellent, cable core length understand etc. beneficial effect.

Description

Layer-stranding cable and preparation method

The application is entitled：A kind of layer-stranding cable and preparation method, Application No.：201510196163.6, application Day is the divisional application of the application for a patent for invention of on 04 23rd, 2015.

Technical field

The invention belongs to technical field of cables, more particularly, to layer-stranding cable and preparation method.

Background technology

People's Republic of China's post and telecommunications professional standard：The basic knot of layer-stranding cable is defined in YD/T901-2009 Structure and requirement, its layer-stranding cable be by many Loose tubes and presumable gasket for packing around center reinforcemen stranded, Ran Hou Intertwist body dresses outside yarn class material formation cable core, makes cable core structure stable, and then coating protective layer forming layer again in cable core bag twists Formula optical cable, the material that blocks water is filled or unfilled with cable core gap.This structure is primarily present following defect：For wrapping yarn class Material requirement is higher, should there is enough intensity, and fracture is not in machine wrapping, require to become with low temperature again shrink or Expansion character, if temperature, which becomes, shrinks excessive, easily causes and stabs Loose tube, fibercuts is caused what is more, have a strong impact on communication；If Warm variable expansion is excessive, and wrapping can be made not tight, insecure, causes intertwist body in coiling or scattering in, deforms Loose tube Fiber transmission performance is caused to reduce.Layer of the prior art twists optical cable sheath material, under the conditions of hot and humid, easily separates out, Aging intensity occurs more than 50% and is greatly lowered, and significant change occurs for electrical property；Because sheath is weightless in oils environment Excessively, it is impossible to worked more than 12 hours；5Kg, 100 DEG C, 20min be to split, making after cable pole can be simultaneously by FV Level and GB2408-80/I as defined in combustion test.

On the other hand, in order that optical cable core reaches effectively blocks water, it is necessary to blocked water material in the inside and outside all fillings of intertwist body, The filling for material that block water needs the equipment of specialty, and is difficult to reach preferable block-water effect.

Intertwist body using yarn class material due to being wrapped up, therefore, it is impossible to learn the length of intertwist body by easy method.

Therefore, people expect there is better method to solve the above problems.

The content of the invention

In order to solve the above problems, an object of the present invention is to disclose layer-stranding cable；The second object of the present invention is The preparation method for disclosing the layer-stranding cable；They are realized using following technical scheme.

Layer-stranding cable in the first embodiment of the present invention, it includes cable core and extrusion molding is coated on outside cable core Restrictive coating, it is characterised in that the cable core by centrally located reinforcer, around many stranded Loose tubes of reinforcer, will be all The fixed bed that Loose tube integral coating is lived, the packed layer outside fixed bed are constituted, and any two adjacent Loose tubes are phases Circumscribed, all there is at least one optical fiber in every Loose tube；Fixed bed is that liquid is sealed relative to internal Loose tube, The material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

The layer-stranding cable of another embodiment in the first embodiment of the present invention, it includes cable core and extrusion molding bag The restrictive coating overlayed on outside cable core, it is characterised in that the cable core is by centrally located reinforcer, around stranded many of reinforcer Root Loose tube, the fixed bed that all Loose tube integral coatings are lived, the packed layer outside fixed bed are constituted, adjacent pine set Pipe can also be two-by-two mutually between nontangential and adjacent Loose tube spacing maximum be 0.2mm；Fixed bed extend into loose set In the internal clearance of pipe formation, all there is at least one optical fiber in every Loose tube；Fixed bed is relative to internal Loose tube It is that liquid is sealed, the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Layer-stranding cable described above, it is characterised in that the material of the packed layer is polypropylene or polyethylene, and is filled out The material of the material and fixed bed that fill layer is differed.

Layer-stranding cable in the second embodiment of the present invention, it includes cable core and extrusion molding is coated on outside cable core Restrictive coating, it is characterised in that the cable core by centrally located reinforcer, around many stranded Loose tubes of reinforcer, will be all Fixed bed that Loose tube integral coating is lived is constituted, and the Loose tube of arbitrary neighborhood is mutual nontangential and adjacent Loose tube two-by-two Between spacing maximum be 0.2mm, fixed bed extend into Loose tube formation internal clearance in, in every Loose tube all have extremely A few optical fiber；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is polypropylene or poly- second Alkene or polybutylene terephthalate (PBT).

Further, the layer-stranding cable described in embodiment two, it include cable core and extrusion molding be coated on cable core it Outer restrictive coating, it is characterised in that the cable core is by centrally located reinforcer, around many stranded Loose tubes of reinforcer, general The fixed bed that all Loose tube integral coatings are lived is constituted, and adjacent Loose tube is mutually circumscribed, is all had extremely in every Loose tube A few optical fiber；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is polypropylene or poly- second Alkene or polybutylene terephthalate (PBT).

Layer-stranding cable in the 3rd embodiment of the present invention, it includes cable core and extrusion molding is coated on outside cable core Restrictive coating, it is characterised in that the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, extremely A few gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, when having many Loose tubes, any phase Adjacent Loose tube is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, when having many gasket for packings, The gasket for packing of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent pine set Pipe and gasket for packing are that the spacing maximum between mutual nontangential and adjacent Loose tube and gasket for packing is 0.2mm, and fixed bed is stretched Enter into Loose tube, the internal clearance of gasket for packing formation, all there is at least one optical fiber in every Loose tube；The number of Loose tube Amount and the quantity sum of gasket for packing are not less than 3；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, fixed bed Material be polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, the layer-stranding cable described in embodiment three, it include cable core and extrusion molding be coated on cable core it Outer restrictive coating, it is characterised in that the cable core is by centrally located reinforcer, around at least one stranded pine set of reinforcer Pipe, at least one gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, when having many Loose tubes, The Loose tube of arbitrary neighborhood is tangent, when having many gasket for packings, and the gasket for packing of arbitrary neighborhood is tangent, adjacent Loose tube It is tangent with gasket for packing, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the number of gasket for packing Measure sum and be not less than 3；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene Or polyethylene or polybutylene terephthalate (PBT).

Layer-stranding cable in the 4th embodiment of the present invention, it includes cable core, the first guarantor outside cable core Sheath, the second protective layer outside the first protective layer and extrusion molding are coated on the restrictive coating outside the second protective layer, and its feature exists In the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one gasket for packing, general The fixed bed that all Loose tubes and all gasket for packing integral coatings are lived is constituted, when having many Loose tubes, the Loose tube of arbitrary neighborhood It is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, when having many gasket for packings, arbitrary neighborhood Gasket for packing is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing It is that spacing maximum mutual between nontangential and adjacent Loose tube and gasket for packing is 0.2mm, fixed bed extend into loose set In pipe, the internal clearance of gasket for packing formation, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and filling The quantity sum of rope is not less than 3；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is Polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of first protective layer is waterstop, the material of the second protective layer Material is steel band or aluminium strip.

Further, the layer-stranding cable described in embodiment four, it includes cable core, first outside cable core Protective layer, the second protective layer outside the first protective layer and extrusion molding are coated on the restrictive coating outside the second protective layer, its feature Be the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one gasket for packing, The fixed bed that all Loose tubes and all gasket for packing integral coatings are lived is constituted, when having many Loose tubes, the pine set of arbitrary neighborhood Pipe is tangent, when having many gasket for packings, and the gasket for packing of arbitrary neighborhood is that tangent, adjacent Loose tube is tangent with gasket for packing , all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the quantity sum of gasket for packing are not less than 3； Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene or polyethylene or poly- pair Benzene dicarboxylic acid butanediol ester；The material of first protective layer is waterstop, and the material of the second protective layer is steel band or aluminium strip.

The preparation method of layer-stranding cable in second embodiment of the invention, it is characterised in that it includes following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 1%~3% color masterbatch or polybutylene terephthalate (PBT) of modified polypropene gross weight 1%~3% color masterbatch of gross weight melts and stirred together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity be moved through 20~40 DEG C with original Loose tube is drawn, is formed The length of optical fiber in finished product Loose tube, finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, finished product Optical fiber in Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on cable-former On reinforcer discharge device and pull out through the first stranded mould the first medium pore, then pass through the first of the second stranded mould Centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by second step Finished product Loose tube that is being formed and being wound on disk tool is by scroll wheel groups and passes through the first edge hole of the first stranded mould, wear again The first edge hole of the second stranded mould is crossed, the first holes around of the 3rd stranded mould is subsequently passed through, then passes through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Make adjacent Loose tube tangent；（3）Drew extrusion molding The reinforcer and Loose tube of head, and make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous with rotating mechanism Rotate, in the injecting hole that the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting are injected to extrusion head, in mistake The right-hand member exit in cable core hole makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting tight using air extractor It is attached to outside finished product Loose tube and forms fixed bed；And then form cable core；

Wherein, disk tool can be rotated relative to fixed pipe discharging mechanism, and scroll wheel groups are located at the top of pipe discharging mechanism；Along Loose tube Release direction：Pipe discharging mechanism be located at the rear of the first stranded mould, the second stranded mould be located at the first stranded mould front, 3rd stranded mould is located at the front of the second stranded mould, extrusion head and is located in front of the 3rd stranded mould；First medium pore, One edge hole is through the first stranded mould and the first medium pore is located at the center of the first stranded mould, and first edge hole has It is multiple and be distributed in outside the first medium pore and first edge hole and the first medium pore are not communicated with, the first medium pore central shaft The distance of line and first edge hole central axis is the first spacing；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore be located at the second stranded mould center, the first edge hole have it is multiple and be distributed in the first centre bore it Outer and the first edge hole is not communicated with the first centre bore, the first centre bore central axis and the first edge hole central axis Distance is the second spacing；It is that first interstitial hole, the first holes around are through the second stranded mould and the first interstitial hole is located at second The center of stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and in the middle of the first holes around and first Hole is not communicated with, and the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore It is not communicated with, the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First spacing ＞ The spacing of second spacing ＞ the 3rd；The injecting hole of extrusion head is connected to logical with cable core hole excessively；

4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the cable core of the 3rd step formation, shape Into restrictive coating, the making of layer-stranding cable is completed.

The preparation method of another layer-stranding cable in second embodiment of the invention, it is characterised in that it includes following step Suddenly：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 1%~3% color masterbatch or polybutylene terephthalate (PBT) of modified polypropene gross weight 1%~3% color masterbatch of gross weight melts and stirred together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity be moved through 20~40 DEG C with original Loose tube is drawn, is formed The length of optical fiber in finished product Loose tube, finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, finished product Optical fiber in Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on cable-former On reinforcer discharge device and pull out through the first stranded mould the first medium pore, then pass through the first of the second stranded mould Centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by second step Finished product Loose tube that is being formed and being wound on disk tool is by scroll wheel groups and passes through the first edge hole of the first stranded mould, wear again The first edge hole of the second stranded mould is crossed, the first holes around of the 3rd stranded mould is subsequently passed through, then passes through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Make to have no more than between adjacent Loose tube 0.2mm gap；（3）The reinforcer and Loose tube of extrusion head were drawn, and makes the first stranded mould, second with rotating mechanism Stranded mould, the 3rd stranded mould synchronous axial system, the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting are noted In the injecting hole for entering extrusion head, air extractor is used to make the polypropylene or polyethylene of melting in the right-hand member exit for crossing cable core hole Or polybutylene terephthalate (PBT) is close to outside finished product Loose tube and entered in the internal clearance of Loose tube formation and forms integration Fixed bed；And then form cable core；

Wherein, disk tool can be rotated relative to fixed pipe discharging mechanism, and scroll wheel groups are located at the top of pipe discharging mechanism；Along Loose tube Release direction：Pipe discharging mechanism be located at the rear of the first stranded mould, the second stranded mould be located at the first stranded mould front, 3rd stranded mould is located at the front of the second stranded mould, extrusion head and is located in front of the 3rd stranded mould；First medium pore, One edge hole is through the first stranded mould and the first medium pore is located at the center of the first stranded mould, and first edge hole has It is multiple and be distributed in outside the first medium pore and first edge hole and the first medium pore are not communicated with, the first medium pore central shaft The distance of line and first edge hole central axis is the first spacing；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore be located at the second stranded mould center, the first edge hole have it is multiple and be distributed in the first centre bore it Outer and the first edge hole is not communicated with the first centre bore, the first centre bore central axis and the first edge hole central axis Distance is the second spacing；It is that first interstitial hole, the first holes around are through the second stranded mould and the first interstitial hole is located at second The center of stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and in the middle of the first holes around and first Hole is not communicated with, and the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore It is not communicated with, the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First spacing ＞ The spacing of second spacing ＞ the 3rd；The injecting hole of extrusion head is connected to logical with cable core hole excessively；

4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the cable core of the 3rd step formation, shape Into restrictive coating, the making of layer-stranding cable is completed.

Layer-stranding cable in the present invention have it is simple in construction, be easy to make, it is more cost-effective, temperature become wide scope become after light Performance stabilization is learned, the machinery equipment used is simple, less investment；Block-water effect is excellent, cable core length understand etc. beneficial effect.

Brief description of the drawings

Fig. 1 is the cross-sectional structure schematic diagram of embodiment 1 of the present invention.

Fig. 2 is the cross-sectional structure schematic diagram of embodiment 2 of the present invention.

Fig. 3 is the cross-sectional structure schematic diagram of embodiment 3 of the present invention.

Fig. 4 is the cross-sectional structure schematic diagram of embodiment 4 of the present invention.

Fig. 5 is the dimensional structure diagram for the stranded part used in manufacture method of the present invention.

Embodiment

Embodiment 1 to embodiment 4 is the embodiment of layer-stranding cable in the present invention；During embodiment 5 is the present invention The embodiment of preparation method.

Embodiment 1

See Fig. 1, layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating 6 outside cable core, it is characterised in that institute Cable core is stated to live by centrally located reinforcer 3, around three stranded Loose tubes 2 of reinforcer, by all Loose tube integral coatings Fixed bed 4, the packed layer 5 outside fixed bed constitute, any two adjacent Loose tubes be it is mutually circumscribed, every pine set All there are eight optical fibers 1 in pipe；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is poly- third Alkene or polyethylene or polybutylene terephthalate (PBT).

Layer-stranding cable described above, it is characterised in that the Loose tube can be in other many, every Loose tube Optical fiber at least has one.

Further, layer-stranding cable described above, it is characterised in that the adjacent Loose tube can also be two-by-two Mutually the spacing maximum between nontangential and adjacent Loose tube is 0.2mm；Fixed bed extend into Loose tube formation it is interior between In gap.

Layer-stranding cable described above, it is characterised in that the material of the packed layer is polypropylene or polyethylene, and is filled out The material of the material and fixed bed that fill layer is differed.

Layer-stranding cable described above, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, its feature It is that the cable core is integrally wrapped by centrally located reinforcer, around many stranded Loose tubes of reinforcer, by all Loose tubes The fixed bed covered, the packed layer outside fixed bed are constituted, and any two adjacent Loose tubes are mutually circumscribed, every pines All there is at least one optical fiber in sleeve pipe；Fixed bed is that liquid is sealed relative to internal Loose tube, the material of fixed bed It is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Embodiment 2

See Fig. 2, layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating 6 outside cable core, it is characterised in that institute Cable core is stated to live by centrally located reinforcer 3, around seven stranded Loose tubes 2 of reinforcer, by all Loose tube integral coatings Fixed bed 4 constitute, the Loose tube of arbitrary neighborhood is spacing maximum two-by-two mutually between nontangential and adjacent Loose tube For 0.2mm, fixed bed is extend into the internal clearance of Loose tube formation, all has eight optical fibers 1 in every Loose tube；It is fixed Layer is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is polypropylene or polyethylene or poly terephthalic acid fourth two Alcohol ester.

Layer-stranding cable described above, it is characterised in that the Loose tube can be in other many, every Loose tube Optical fiber at least has one.

Layer-stranding cable described above, it is mutually circumscribed for can also be adjacent Loose tube, and fixed bed does not extend into pine In the internal clearance of sleeve pipe formation.

Embodiment 3

See Fig. 3, layer-stranding cable, substantially with embodiment 2, difference is that wherein two Loose tubes are filled 7 institutes of rope Instead of；The material of gasket for packing is polypropylene or polyethylene.

Layer-stranding cable in this embodiment, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, its It is characterised by that the cable core is filled out by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one Rope, the fixed bed for living all Loose tubes and gasket for packing integral coating is filled to constitute, when having many Loose tubes, the pine set of arbitrary neighborhood Pipe is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, when having many gasket for packings, arbitrary neighborhood Gasket for packing be that spacing maximum mutually between nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and filling Rope is that the spacing maximum between mutual nontangential and adjacent Loose tube and gasket for packing is 0.2mm, and fixed bed extend into loose set In pipe, the internal clearance of gasket for packing formation, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and filling The quantity sum of rope is not less than 3；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is Polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, the layer-stranding cable described in this embodiment, it include cable core and extrusion molding be coated on cable core it Outer restrictive coating, it is characterised in that the cable core is by centrally located reinforcer, around at least one stranded pine set of reinforcer Pipe, at least one gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, when having many Loose tubes, The Loose tube of arbitrary neighborhood is tangent, when having many gasket for packings, and the gasket for packing of arbitrary neighborhood is tangent, adjacent Loose tube It is tangent with gasket for packing, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the number of gasket for packing Measure sum and be not less than 3；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene Or polyethylene or polybutylene terephthalate (PBT).

Embodiment 4

See Fig. 4, layer-stranding cable, it includes cable core, the first protective layer 8 outside cable core, positioned at the first protective layer Outside the second protective layer 9 and extrusion molding be coated on restrictive coating 6 outside the second protective layer, it is characterised in that the cable core by positioned at The reinforcer 3 in center, around five stranded Loose tubes 2 of reinforcer, two gasket for packings 7, by all Loose tubes and all fillings The fixed bed 4 lived of rope integral coating is constituted, the Loose tube of arbitrary neighborhood be two-by-two mutually nontangential, arbitrary neighborhood Loose tube with Gasket for packing is that mutually nontangential, arbitrary neighborhood gasket for packing is two-by-two mutually between nontangential and adjacent Loose tube two-by-two Spacing maximum is that the spacing maximum between 0.2mm, adjacent gasket for packing is between 0.2mm, adjacent Loose tube and gasket for packing Spacing maximum is 0.2mm, and fixed bed extend into the internal clearance of Loose tube and gasket for packing formation, all had in every Loose tube Eight optical fibers 1；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene Or polyethylene or polybutylene terephthalate (PBT)；The material of first protective layer is waterstop, and the material of the second protective layer is steel Band or aluminium strip.

Certainly, in this embodiment, can also be between adjacent Loose tube it is to be between tangent, adjacent gasket for packing It is tangent between tangent, adjacent Loose tube and gasket for packing.

Layer-stranding cable described in this embodiment, it includes cable core, the first protective layer outside cable core, position The restrictive coating outside the second protective layer is coated in the second protective layer and extrusion molding outside the first protective layer, it is characterised in that described Cable core is by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one gasket for packing, by all pines Fixed bed that sleeve pipe and all gasket for packing integral coatings are lived is constituted, when having many Loose tubes, and the Loose tube of arbitrary neighborhood is not mutually not Spacing maximum between tangent and adjacent Loose tube is 0.2mm, when having many gasket for packings, the gasket for packing of arbitrary neighborhood It is that spacing maximum mutually between nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing are not mutually not It is tangent, and spacing maximum between adjacent Loose tube and gasket for packing is 0.2mm, fixed bed extend into Loose tube, filling Restrict in the internal clearance formed, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the number of gasket for packing Measure sum and be not less than 3；Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene Or polyethylene or polybutylene terephthalate (PBT)；The material of first protective layer is waterstop, and the material of the second protective layer is steel Band or aluminium strip.

Further, the layer-stranding cable described in this embodiment, it includes cable core, first outside cable core Protective layer, the second protective layer outside the first protective layer and extrusion molding are coated on the restrictive coating outside the second protective layer, its feature Be the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one gasket for packing, The fixed bed that all Loose tubes and all gasket for packing integral coatings are lived is constituted, when having many Loose tubes, the pine set of arbitrary neighborhood Pipe is tangent, when having many gasket for packings, and the gasket for packing of arbitrary neighborhood is that tangent, adjacent Loose tube is tangent with gasket for packing , all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the quantity sum of gasket for packing are not less than 3； Fixed bed is that liquid is sealed relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene or polyethylene or poly- pair Benzene dicarboxylic acid butanediol ester；The material of first protective layer is waterstop, and the material of the second protective layer is steel band or aluminium strip.

In this embodiment, the difference depending on application scenario can also individually omit the first protective layer or individually omit second and protect Sheath.

In embodiment 3 and embodiment 4, two gasket for packings are not limited to, can be other many gasket for packings, can also It is only one gasket for packing.

Certainly, layer-stranding cable of the embodiment 1 of the present invention into embodiment 3 described in any embodiment, can As embodiment 4, the first protective layer and the second protective layer are set between cable core and restrictive coating；Further, can be with First protective layer is only set between cable core and restrictive coating or the second protective layer is only set.

Layer-stranding cable described in any of the above-described embodiment, can also set a variety of protective layers, such as outside restrictive coating Steel belt layer is first set, then external sheath layer is set, optical fiber therein so can be more effectively protected, make the performances such as mechanical resistance to compression big Big enhancing；Nylon layer can also be set outside restrictive coating, the purpose of ant proof can be so reached；Etc., it is numerous.

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the reinforcer be steel wire or Fiberglass-reinforced plastic lever.

As further simplifying, the layer-stranding cable described in above-mentioned embodiment 1,2, it is characterised in that the cable core In Loose tube can also be and be arranged in parallel, rather than it is stranded set, be arranged in parallel the stranded dress that can be saved in cabling device Put, in this embodiment it is not even necessary to cabling device；It is, of course, also possible to save Loose tube and optical fiber due to the length of stranded generation, one can be entered Step saves cost.

As further simplifying, the layer-stranding cable described in above-mentioned embodiment 3,4, it is characterised in that the cable core In Loose tube, gasket for packing can also be and be arranged in parallel, rather than it is stranded set, be arrangeding in parallel to save in cabling device Stranding device, in this embodiment it is not even necessary to cabling device；It is, of course, also possible to Loose tube and optical fiber are saved due to the length of stranded generation, can Further to save cost.

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the restrictive coating be low cigarette without Halogen flame-proof polyethylene or LLDPE or low density polyethylene (LDPE) or medium density polyethylene or high density polyethylene (HDPE).

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the Loose tube is modified poly- Propylene or polybutylene terephthalate (PBT).

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the optical fiber be G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 Type or OM2 types or OM3 types.

Embodiment 5

See Fig. 5, and referring to figs. 1 to Fig. 4, the preparation method of the layer-stranding cable described in embodiment 1, it is characterised in that it Include following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；Eight times repeatedly, form eight Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 1%~3% color masterbatch or polybutylene terephthalate (PBT) of modified polypropene gross weight 1%~3% color masterbatch of gross weight melts and stirred together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity be moved through 20~40 DEG C with original Loose tube is drawn, is formed The length of optical fiber in finished product Loose tube, finished product Loose tube is 1.002~1.008 times of finished product Loose tube length；Repeatedly Three times, form three finished product Loose tubes 2；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer 3 and is placed on cable-former Reinforcer discharge device on and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould Tool 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through extrusion head 51 inside mistake cable core Hole 52；(2) finished product Loose tube 2 that is forming second step and being wound on the first disk tool 11 is by the first scroll wheel groups 31 and passes through The first edge hole 411 of first stranded mould 41, the first edge hole 421 for being then passed through the second stranded mould 42, it is subsequently passed through First holes around 431 of three stranded moulds 43, then pass through crossing cable core hole and ensuring finished product Loose tube inside extrusion head 51 Outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the second disk tool 12 passes through the second scroll wheel groups 32 and through the first stranded mould 41 first edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, connect The first holes around 431 through the 3rd stranded mould 43, then pass through crossing cable core hole and ensuring into inside extrusion head 51 Product Loose tube is located at outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the 3rd disk tool 13 is by the 3rd Scroll wheel groups 33 simultaneously pass through the first edge hole 411 of the first stranded mould 41, are then passed through the first edge of the second stranded mould 42 Hole 421, the first holes around 431 for being subsequently passed through the 3rd stranded mould 43, then pass through and cross cable core hole inside extrusion head 51 And ensure that finished product Loose tube is located at outside reinforcer；Make adjacent Loose tube tangent；（3）Drew extrusion head reinforcer and Loose tube, and make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, by melting In the injecting hole 53 of polypropylene or polyethylene or polybutylene terephthalate (PBT) injection extrusion head, the right-hand member in cable core hole is being crossed Exit makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting be close to finished product pine set using air extractor Pipe is outer to form fixed bed；（4）Polypropylene or the bar of polyethylene formation is taken to be filled in outside fixed bed and form packed layer；And then Form cable core；The material of packed layer and the material of fixed bed are differed；

Wherein, the first disk tool 11 can be rotated relative to the first fixed pipe discharging mechanism 21, and the first scroll wheel groups 31 are located at first The top of pipe discharging mechanism 21；Second disk tool 12 can be rotated relative to the second fixed pipe discharging mechanism 22, the second scroll wheel groups 32 Positioned at the top of the second pipe discharging mechanism 22；3rd disk tool 13 can be rotated relative to the 3rd fixed pipe discharging mechanism 23, the 3rd rolling Driving wheel group 33 is located at the top of the 3rd pipe discharging mechanism 23；Along the release direction of Loose tube：3rd pipe discharging mechanism puts pipe positioned at second The front of mechanism, the second pipe discharging mechanism are located at the front of the first pipe discharging mechanism, the first pipe discharging mechanism and are located at the first stranded mould Rear, the second stranded mould are located at the front of the first stranded mould, the 3rd stranded mould and are located at the front of the second stranded mould, squeeze Molding machine head is located in front of the 3rd stranded mould；First medium pore, first edge hole be through the first stranded mould and in first Central aperture is located at the center of the first stranded mould, and first edge hole has multiple and is distributed in outside the first medium pore and first edge Hole and the first medium pore are not communicated with, and the distance of the first medium pore central axis and first edge hole central axis is between first Away from；First centre bore, the first edge hole are through the second stranded mould and the first centre bore is located in the second stranded mould Centre, the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore are to be not communicated with , the distance of the first centre bore central axis and the first edge hole central axis is the second spacing；First interstitial hole, around first Hole is through the second stranded mould and the first interstitial hole is located at the center of the second stranded mould, the first holes around have it is multiple and It is distributed in outside the first interstitial hole and the first holes around is not communicated with the first interstitial hole, the first edge hole has multiple and divided Cloth is outside the first centre bore and the first edge hole is not communicated with the first centre bore, the first interstitial hole central axis and first The distance of holes around central axis is the 3rd spacing；The spacing of first the second spacing of spacing ＞ ＞ the 3rd；The injecting hole of extrusion head It is connected to cable core hole excessively logical；

4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the cable core of the 3rd step formation, shape Into restrictive coating, the making of layer-stranding cable is completed.

Certainly, in the above method, Loose tube is not limited to three, can also be many；As long as have to the disk for coiling Loose tube, Pipe discharging mechanism, scroll wheel groups correspondingly increase；Optical fiber in Loose tube is also not limited to eight, but at least one.

The preparation method of layer-stranding cable described in embodiment 2, it is characterised in that it includes following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 1%~3% color masterbatch or polybutylene terephthalate (PBT) of modified polypropene gross weight 1%~3% color masterbatch of gross weight melts and stirred together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity be moved through 20~40 DEG C with original Loose tube is drawn, is formed The length of optical fiber in finished product Loose tube, finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, finished product Optical fiber in Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on cable-former On reinforcer discharge device and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； Make adjacent Loose tube tangent；（3）The reinforcer and Loose tube of extrusion head were drawn, and makes the first stranded mould with rotating mechanism Tool, the second stranded mould, the 3rd stranded mould synchronous axial system, by the polypropylene or polyethylene or poly terephthalic acid fourth two of melting In the injecting hole 53 of alcohol ester injection extrusion head, air extractor is used to make the polypropylene of melting in the right-hand member exit for crossing cable core hole Or polyethylene or polybutylene terephthalate (PBT) are close to outside finished product Loose tube and form fixed bed；And then form cable core；

Wherein, disk tool can be rotated relative to fixed pipe discharging mechanism, and scroll wheel groups are located at the top of pipe discharging mechanism；Along Loose tube Release direction：Pipe discharging mechanism be located at the rear of the first stranded mould, the second stranded mould be located at the first stranded mould front, 3rd stranded mould is located at the front of the second stranded mould, extrusion head and is located in front of the 3rd stranded mould；First medium pore, One edge hole is through the first stranded mould and the first medium pore is located at the center of the first stranded mould, and first edge hole has It is multiple and be distributed in outside the first medium pore and first edge hole and the first medium pore are not communicated with, the first medium pore central shaft The distance of line and first edge hole central axis is the first spacing；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore be located at the second stranded mould center, the first edge hole have it is multiple and be distributed in the first centre bore it Outer and the first edge hole is not communicated with the first centre bore, the first centre bore central axis and the first edge hole central axis Distance is the second spacing；It is that first interstitial hole, the first holes around are through the second stranded mould and the first interstitial hole is located at second The center of stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and in the middle of the first holes around and first Hole is not communicated with, and the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore It is not communicated with, the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First spacing ＞ The spacing of second spacing ＞ the 3rd；The injecting hole of extrusion head is connected to logical with cable core hole excessively；

4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the cable core of the 3rd step formation, shape Into restrictive coating, the making of layer-stranding cable is completed.

The preparation method of another layer-stranding cable described in embodiment 2, it is characterised in that it includes following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 1%~3% color masterbatch or polybutylene terephthalate (PBT) of modified polypropene gross weight 1%~3% color masterbatch of gross weight melts and stirred together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity be moved through 20~40 DEG C with original Loose tube is drawn, is formed The length of optical fiber in finished product Loose tube, finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, finished product Optical fiber in Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on cable-former On reinforcer discharge device and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； Make that there is no more than 0.2mm gap between adjacent Loose tube；（3）The reinforcer and Loose tube of extrusion head were drawn, and Make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, by the polypropylene of melting or poly- In the injecting hole 53 of ethene or polybutylene terephthalate (PBT) injection extrusion head, used in the right-hand member exit for crossing cable core hole Air extractor makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting be close to outside finished product Loose tube and enter The fixed bed of integration is formed in the internal clearance of Loose tube formation；And then form cable core；

Wherein, disk tool can be rotated relative to fixed pipe discharging mechanism, and scroll wheel groups are located at the top of pipe discharging mechanism；Along Loose tube Release direction：Pipe discharging mechanism be located at the rear of the first stranded mould, the second stranded mould be located at the first stranded mould front, 3rd stranded mould is located at the front of the second stranded mould, extrusion head and is located in front of the 3rd stranded mould；First medium pore, One edge hole is through the first stranded mould and the first medium pore is located at the center of the first stranded mould, and first edge hole has It is multiple and be distributed in outside the first medium pore and first edge hole and the first medium pore are not communicated with, the first medium pore central shaft The distance of line and first edge hole central axis is the first spacing；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore be located at the second stranded mould center, the first edge hole have it is multiple and be distributed in the first centre bore it Outer and the first edge hole is not communicated with the first centre bore, the first centre bore central axis and the first edge hole central axis Distance is the second spacing；It is that first interstitial hole, the first holes around are through the second stranded mould and the first interstitial hole is located at second The center of stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and in the middle of the first holes around and first Hole is not communicated with, and the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore It is not communicated with, the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First spacing ＞ The spacing of second spacing ＞ the 3rd；The injecting hole of extrusion head is connected to logical with cable core hole excessively；

4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the cable core of the 3rd step formation, shape Into restrictive coating, the making of layer-stranding cable is completed.

Or, in optical cable or fiber optic cable production method described above, the restrictive coating described in any embodiment is by following weight The raw material composition of part：BS：30~55 parts；Poly- (2,6 diethyl-Isosorbide-5-Nitrae-phenylene) ether：25~50 Part；LLDPE：15~35 parts；Polypropylene：20~35 parts；Butylene：15~45 parts；The commercially available cycloalkanes of model 4006 Base white oil：8~30 parts；Trioctyl phosphate：30~50 parts；Lubricant：1~4 part；Cable jacket is anti-oxidant with model 1010 Agent：0.3~0.8 part；Model UV-234 or UV-360 ultraviolet-resistant absorbent：0.3~0.7 part；Titanium dioxide：5~10 parts；It is poly- Ethylene waxes：4~8 parts.The restrictive coating of above-mentioned formula after aging in 2400 hours, is not separated out under 85 DEG C and 85 humidity environments, machinery Intensity can keep before ageing more than 96%, and electrical property is without obvious change；Soaked in 97# gasoline 24 hours bodies lost weights≤ 10%；Under 135 DEG C, 1h and 12Kg loading conditions, there is no cracking phenomena；Make passed through after cable FV-0 grades and Combustion test as defined in GB2408-80/I.

In the present invention, the spacing of first the second spacing of spacing ＞ ＞ the 3rd can make Loose tube/gasket for packing in cable core progressively When shaping reaches fixed formable layer, the technique effect such as its indeformable, easy shaping.

It is of the invention compared with traditional use yarn class wrapping, with the faster advantage of speed of production, reached 250m/ Min most fast stranding speed, and stranding speed only 80m/min of the prior art；Hence it is evident that save electric power input and Artificial input.

The infiltration test of 10000 optical cables is equally done, it is of the invention compared with traditional layer-stranding cable, by YD/T901- There is not infiltration phenomenon in method test as defined in 2009, the present invention, and traditional layer-stranding cable has reached 10% infiltration Rate, therefore, the present invention have more preferable water permeability resistance energy.

The present invention is placed in -50 to+90 DEG C of temperature test chambers and done experiment, and with -50 DEG C ,+90 DEG C, per temperature spot, holding 24 is small When, it is once alternately a circulation, continuous 300 times, maximum temperature change additional attenuation value is 0.035dB/km；And existing skill Layer-stranding cable in art, in the range of said temperature, 2 circulations have occurred as soon as temperature change additional attenuation value for 0.3dB/km Phenomenon, have impact on being normally carried out for optic communication, through dissection, have on the Loose tube of many places occur prick trace;Therefore, the present invention has more Excellent temperature resistance becomes performance.

In the present invention, length mark can be stamped on fixed bed, the purpose of convenient identification can be reached, meanwhile, may be used also Using the fixed bed of different colours, to reach the purpose of differentiation.

Layer-stranding cable in the present invention have it is simple in construction, be easy to make, it is more cost-effective, temperature become wide scope become after light Performance stabilization is learned, the machinery equipment used is simple, less investment；The main Advantageous such as block-water effect is excellent, cable core length is understood Effect.

The present invention is not limited to above-mentioned preferred forms, it will be appreciated that design of the invention can be by other a variety of shapes Formula is implemented to use, and they are also fallen within protection scope of the present invention.

Claims (8)

1. layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, it is characterised in that the cable core The fixed bed lived by centrally located reinforcer, around many stranded Loose tubes of reinforcer, by all Loose tube integral coatings, Packed layer outside fixed bed is constituted, the Loose tube of arbitrary neighborhood be two-by-two mutually nontangential and adjacent Loose tube it Between spacing maximum be 0.2mm, fixed bed extend into Loose tube formation internal clearance in, in every Loose tube all have at least A piece optical fiber；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is polypropylene or polyethylene Or polybutylene terephthalate (PBT)；The material of the reinforcer is steel wire or fiberglass-reinforced plastic lever.

2. layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, it is characterised in that the cable core By centrally located reinforcer, outside reinforcer and many Loose tubes of parallel distribution, by all Loose tube integral coatings Fixed bed firmly, the packed layer outside fixed bed are constituted, and the Loose tube of arbitrary neighborhood is mutually nontangential and adjacent two-by-two Loose tube between spacing maximum be 0.2mm, fixed bed extend into Loose tube formation internal clearance in, in every Loose tube All there is at least one optical fiber；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is poly- third Alkene or polyethylene or polybutylene terephthalate (PBT)；The material of the reinforcer is steel wire or fiberglass-reinforced plastic lever.

3. layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, it is characterised in that the cable core The fixed bed lived by centrally located reinforcer, around many stranded Loose tubes of reinforcer, by all Loose tube integral coatings, Packed layer outside fixed bed is constituted, and adjacent Loose tube is mutually circumscribed, all has at least one in every Loose tube Optical fiber；Fixed bed is that liquid is sealed relative to internal Loose tube, and the material of fixed bed is polypropylene or polyethylene or poly- Mutual-phenenyl two acid bromide two alcohol ester；The material of the reinforcer is steel wire or fiberglass-reinforced plastic lever.

4. layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, it is characterised in that the cable core By centrally located reinforcer, outside reinforcer and many Loose tubes of parallel distribution, by all Loose tube integral coatings Fixed bed firmly, the packed layer outside fixed bed are constituted, and adjacent Loose tube is mutually circumscribed, is all had in every Loose tube There is at least one optical fiber；Fixed bed relative to internal Loose tube be liquid sealedly, the material of fixed bed be polypropylene or Polyethylene or polybutylene terephthalate (PBT)；The material of the reinforcer is steel wire or fiberglass-reinforced plastic lever.

5. the layer-stranding cable according to claim 1 to claim 4 any one, it is characterised in that the packed layer Material is polypropylene or polyethylene, and the material of packed layer and the material of fixed bed are differed.

6. layer-stranding cable according to claim 5, it is characterised in that the material of the restrictive coating is that linea low density gathers Ethene is made up of the raw material of following parts by weight：BS：30~55 parts；Poly- (2,6 diethyl-Isosorbide-5-Nitrae- Phenylene) ether：25~50 parts；LLDPE：15~35 parts；Polypropylene：20~35 parts；Butylene：15~45 parts；City Sell the naphthenic base white oil of model 4006：8~30 parts；Trioctyl phosphate：30~50 parts；Lubricant：1~4 part；Cable jacket type Number be 1010 antioxidant：0.3~0.8 part；Model UV-234 or UV-360 ultraviolet-resistant absorbent：0.3~0.7 part； Titanium dioxide：5~10 parts；Tissuemat E：4~8 parts；The material of the Loose tube is modified polypropene or poly terephthalic acid fourth two Alcohol ester.

7. according to claim 1 or claim 2 or claim 3 or claim 4 or claim 6 or claim 7 institute The layer-stranding cable stated, it is characterised in that the optical fiber be G.652 type or G.653 type G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or OM3 types.

8. the preparation method of layer-stranding cable, it is characterised in that it includes following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；Eight times repeatedly, form eight Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 1%~3% color masterbatch or polybutylene terephthalate (PBT) of modified polypropene gross weight 1%~3% color masterbatch of gross weight melts and stirred together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity be moved through 20~40 DEG C with original Loose tube is drawn, is formed The length of optical fiber in finished product Loose tube, finished product Loose tube is 1.002~1.008 times of finished product Loose tube length；Repeatedly Three times, form three finished product Loose tubes；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on cable-former On reinforcer discharge device and pull out through the first stranded mould the first medium pore, then pass through the first of the second stranded mould Centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by second step Finished product Loose tube that is being formed and being wound on disk tool is by scroll wheel groups and passes through the first edge hole of the first stranded mould, wear again The first edge hole of the second stranded mould is crossed, the first holes around of the 3rd stranded mould is subsequently passed through, then passes through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Make adjacent Loose tube tangent；（3）Drew extrusion molding The reinforcer and Loose tube of head, and make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous with rotating mechanism Rotate, in the injecting hole that the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting are injected to extrusion head, in mistake The right-hand member exit in cable core hole makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting tight using air extractor It is attached to outside finished product Loose tube and forms fixed bed；And then form cable core；

Wherein, disk tool can be rotated relative to fixed pipe discharging mechanism, and scroll wheel groups are located at the top of pipe discharging mechanism；Along Loose tube Release direction：Pipe discharging mechanism be located at the rear of the first stranded mould, the second stranded mould be located at the first stranded mould front, 3rd stranded mould is located at the front of the second stranded mould, extrusion head and is located in front of the 3rd stranded mould；First medium pore, One edge hole is through the first stranded mould and the first medium pore is located at the center of the first stranded mould, and first edge hole has It is multiple and be distributed in outside the first medium pore and first edge hole and the first medium pore are not communicated with, the first medium pore central shaft The distance of line and first edge hole central axis is the first spacing；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore be located at the second stranded mould center, the first edge hole have it is multiple and be distributed in the first centre bore it Outer and the first edge hole is not communicated with the first centre bore, the first centre bore central axis and the first edge hole central axis Distance is the second spacing；It is that first interstitial hole, the first holes around are through the second stranded mould and the first interstitial hole is located at second The center of stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and in the middle of the first holes around and first Hole is not communicated with, and the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore It is not communicated with, the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First spacing ＞ The spacing of second spacing ＞ the 3rd；The injecting hole of extrusion head is connected to logical with cable core hole excessively；

4th step：Restrictive coating forming step：LLDPE or following sheath material are passed through into sheath extruding machine extrusion molding Outside the cable core for being coated on the formation of the 3rd step, restrictive coating is formed, the making of layer-stranding cable is completed；The sheath material by with What the raw material of lower parts by weight was constituted：BS：30~55 parts；Poly- (2,6 diethyl-Isosorbide-5-Nitrae-phenylene) ether： 25~50 parts；LLDPE：15~35 parts；Polypropylene：20~35 parts；Butylene：15~45 parts；Commercially available model 4006 naphthenic base white oils：8~30 parts；Trioctyl phosphate：30~50 parts；Lubricant：1~4 part；Cable jacket model 1010 Antioxidant：0.3~0.8 part；Model UV-234 or UV-360 ultraviolet-resistant absorbent：0.3~0.7 part；Titanium dioxide：5 ~10 parts；Tissuemat E：4~8 parts；The material of the Loose tube is modified polypropene or polybutylene terephthalate (PBT).