CN104730666B - A kind of layer-stranding cable and preparation method - Google Patents

Abstract

The invention belongs to technical field of cables, more particularly, to a kind of layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, it is characterized in that the cable core is constituted by centrally located reinforcer, around the stranded Loose tube of reinforcer, by the fixed bed that all Loose tube integral coatings are lived, 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 liquid-tight envelope 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.Of the invention to have simple structure, be easy to making, more cost-effective, stable optical performance after temperature change wide scope change, the machinery equipment for using is simple, less investment；Block-water effect is excellent, cable core length understand etc. beneficial effect.

Description

A kind of layer-stranding cable and preparation method

Technical field

The invention belongs to technical field of cables, more particularly, to a kind of 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 are, Ran Hous stranded around center reinforcemen by many Loose tubes and presumable gasket for packing Intertwist body dresses outside yarn class material and forms cable core, makes cable core structure stabilization, 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 becomes shrinks excessive, is easily caused and stabs Loose tube, and fibercuts is caused what is more, has 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 Causing fiber transmission performance reduces.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 electrical property occurs significant change；Because sheath is weightless in oils environment Excessively, it is impossible to worked more than 12 hours；5Kg, 100 DEG C, 20min can split, pole can simultaneously pass through FV after making cable The combustion test that level and GB2408-80/I specify.

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 professional equipment, and is difficult to reach preferable block-water effect.

Intertwist body is wrapped up due to use yarn class material, 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 a kind of layer-stranding cable；The purpose of the present invention it Two is the preparation method for disclosing the layer-stranding cable；They are realized using following technical scheme.

A kind of layer-stranding cable in first embodiment of the invention, 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, the packed layer outside fixed bed are constituted, any two adjacent Loose tubes It is mutually circumscribed, all there is at least one optical fiber in every Loose tube；Fixed bed is liquid-tight relative to internal Loose tube Envelope, the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable of another embodiment in first embodiment of the invention, it includes cable core and squeezes Modeling is coated on restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, stranded around reinforcer Many Loose tubes, the fixed bed of living all Loose tube integral coatings, packed layer outside fixed bed constitute, it is adjacent Loose tube can also be two-by-two mutually between nontangential and adjacent Loose tube spacing maximum be 0.2mm；Fixed bed extend into In the internal clearance that Loose tube is formed, all there is at least one optical fiber in every Loose tube；Fixed bed is relative to internal pine Sleeve pipe is liquid-tight envelope, and the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable described above, it is characterised in that the material of the packed layer is polypropylene or polyethylene, And the material of packed layer is differed with the material of fixed bed.

A kind of layer-stranding cable in second embodiment of the invention, 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 the Loose tube of arbitrary neighborhood is pine mutually nontangential and adjacent two-by-two Spacing maximum between sleeve pipe is 0.2mm, and fixed bed is extend into the internal clearance of Loose tube formation, is all had in every Loose tube There is at least one optical fiber；Fixed bed is liquid-tight envelope relative to internal Loose tube, the material of fixed bed be polypropylene or Polyethylene or polybutylene terephthalate (PBT).

Further, a kind of layer-stranding cable described in embodiment two, it includes cable core and extrusion molding is coated on cable Restrictive coating outside core, it is characterised in that the cable core is by centrally located reinforcer, around many stranded pine sets of reinforcer Pipe, the fixed bed for living all Loose tube integral coatings 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 is liquid-tight envelope relative to internal Loose tube, the material of fixed bed be polypropylene or Polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable in 3rd embodiment of the invention, 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 that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, there is many fillings During rope, the gasket for packing of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing be that spacing maximum between mutually nontangential and adjacent Loose tube and gasket for packing is 0.2mm, Gu Given layer is extend into the internal clearance that Loose tube, gasket for packing are formed, and all has at least one optical fiber in every Loose tube；Pine set The quantity of pipe is not less than 3 with the quantity sum of gasket for packing；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, The material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, a kind of layer-stranding cable described in embodiment three, it includes cable core and extrusion molding is coated on cable Restrictive coating outside core, it is characterised in that the cable core is by centrally located reinforcer, around stranded at least one of reinforcer Loose tube, at least one gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, and have many Loose tubes When, the Loose tube of arbitrary neighborhood is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is tangent, adjacent pine Sleeve pipe is tangent with gasket for packing, all has at least one optical fiber in every Loose tube；The quantity and gasket for packing of Loose tube Quantity sum be not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, and the material of fixed bed is poly- Propylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable in 4th embodiment of the invention, it includes cable core, outside cable core One 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, and it is special Levy is that the cable core is filled 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 all gasket for packing integral coatings are constituted, when having many Loose tubes, the pine of arbitrary neighborhood Sleeve pipe is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, when having many gasket for packings, any phase Adjacent gasket for packing is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube with fill out It is that spacing maximum mutual between nontangential and adjacent Loose tube and gasket for packing is 0.2mm to fill rope, and fixed bed extend into pine In the internal clearance that sleeve pipe, gasket for packing are formed, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube with fill out The quantity sum for filling rope is not less than 3；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube and gasket for packing It is polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, the second protective layer Material is steel band or aluminium strip.

Further, a kind of layer-stranding cable described in embodiment four, it includes cable core, outside cable core First 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 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 The fixed bed that all Loose tubes and all gasket for packing integral coatings fill rope, lived is constituted, when having many Loose tubes, arbitrary neighborhood Loose tube is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is that tangent, adjacent Loose tube is with gasket for packing Tangent, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube is not small with the quantity sum of gasket for packing In 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, the material of fixed bed be polypropylene or polyethylene or Polybutylene terephthalate (PBT)；The material of the 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 are in light UV solidification colorings are carried out on fine tinting machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, formed Many optical fibers, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) is taken to be squeezed secondary coated Melted in the spiral shell chamber of molding machine, and add modified polypropene gross weight 1%~3% color masterbatch or poly terephthalic acid fourth two The color masterbatch of the 1%~3% of alcohol ester gross weight melts and stirs together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the optical fiber that the first step is formed to be penetrated the cavity inside original Loose tube In, the bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, Finished product Loose tube is formed, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, Optical fiber in finished product Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on stranding as reinforcer On the reinforcer discharge device of machine and pull out through the first stranded mould the first medium pore, then pass through the second stranded mould First centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by Two steps formed and be wound on disk tool on finished product Loose tube by scroll wheel groups and pass through the first stranded mould first edge hole, The first edge hole of the second stranded mould is then passed through, the first holes around of the 3rd stranded mould is subsequently passed through, is then passed through extrusion molding Crossing cable core hole and ensuring that finished product Loose tube is located at outside reinforcer inside head；Make adjacent Loose tube tangent；（3）Drew The reinforcer and Loose tube of extrusion head, and make the first stranded mould, the second stranded mould, the 3rd stranded mould with rotating mechanism Synchronous axial system, in the injecting hole of polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head that will be melted, The polypropylene of melting or polyethylene or polybutylene terephthalate are made using air extractor in the right-hand member exit for crossing cable core hole Ester is close 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 pine The release direction of sleeve pipe：Pipe discharging mechanism is located at the rear of the first stranded mould, the second stranded mould and is located at the first stranded mould Front, the 3rd stranded mould are located at the front of the second stranded mould, extrusion head and are located at the 3rd stranded mould front；First center Hole, first edge hole are through the first stranded mould and the first medium pore is located at the center of the first stranded mould, first edge Hole has multiple and is distributed in outside the first medium pore and first edge hole is not communicated with the first medium pore, the first medium pore Central axis is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through second Stranded mould and the first centre bore is located at the center of the second stranded mould, the first edge hole has multiple and is distributed in first Outside heart hole and the first edge hole and the first centre bore are not communicated with, the first centre bore central axis and the first edge hole center The distance of axis is the second spacing；First interstitial hole, the first holes around are through the second stranded mould and the first middle hole position In the center of the second stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and the first holes around and the One interstitial 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 first Centre bore is not communicated with, and the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First The spacing of the second spacing of 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 or medium density polyethylene or high density polyethylene (HDPE) by sheath extruding machine extrusion molding be coated on cable core that the 3rd step formed it Outward, restrictive coating is formed, 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：

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 are in light UV solidification colorings are carried out on fine tinting machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, formed Many optical fibers, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) is taken to be squeezed secondary coated Melted in the spiral shell chamber of molding machine, and add modified polypropene gross weight 1%~3% color masterbatch or poly terephthalic acid fourth two The color masterbatch of the 1%~3% of alcohol ester gross weight melts and stirs together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the optical fiber that the first step is formed to be penetrated the cavity inside original Loose tube In, the bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, Finished product Loose tube is formed, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, Optical fiber in finished product Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on stranding as reinforcer On the reinforcer discharge device of machine and pull out through the first stranded mould the first medium pore, then pass through the second stranded mould First centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by Two steps formed and be wound on disk tool on finished product Loose tube by scroll wheel groups and pass through the first stranded mould first edge hole, The first edge hole of the second stranded mould is then passed through, the first holes around of the 3rd stranded mould is subsequently passed through, is then passed through extrusion molding Crossing cable core hole and ensuring that finished product Loose tube is located at outside reinforcer inside head；Make to have between adjacent Loose tube and be not more than The gap of 0.2mm；（3）The reinforcer and Loose tube of extrusion head were drawn, and made the first stranded mould, second with rotating mechanism Stranded mould, the 3rd stranded mould synchronous axial system, polypropylene or polyethylene or the polybutylene terephthalate (PBT) note that will be melted Enter in the injecting hole of extrusion head, the polypropylene of melting or polyethylene are made using air extractor in the right-hand member exit for crossing cable core hole Or polybutylene terephthalate (PBT) is close to outside finished product Loose tube and enters and integration is formed in the internal clearance that Loose tube is formed 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 pine The release direction of sleeve pipe：Pipe discharging mechanism is located at the rear of the first stranded mould, the second stranded mould and is located at the first stranded mould Front, the 3rd stranded mould are located at the front of the second stranded mould, extrusion head and are located at the 3rd stranded mould front；First center Hole, first edge hole are through the first stranded mould and the first medium pore is located at the center of the first stranded mould, first edge Hole has multiple and is distributed in outside the first medium pore and first edge hole is not communicated with the first medium pore, the first medium pore Central axis is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through second Stranded mould and the first centre bore is located at the center of the second stranded mould, the first edge hole has multiple and is distributed in first Outside heart hole and the first edge hole and the first centre bore are not communicated with, the first centre bore central axis and the first edge hole center The distance of axis is the second spacing；First interstitial hole, the first holes around are through the second stranded mould and the first middle hole position In the center of the second stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and the first holes around and the One interstitial 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 first Centre bore is not communicated with, and the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First The spacing of the second spacing of 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 or medium density polyethylene or high density polyethylene (HDPE) by sheath extruding machine extrusion molding be coated on cable core that the 3rd step formed it Outward, restrictive coating is formed, the making of layer-stranding cable is completed.

Layer-stranding cable in the present invention has simple structure, is easy to making, more cost-effective, light after temperature change wide scope change Stable performance is learned, the machinery equipment for using 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 of the present invention 1.

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

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

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

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

Specific embodiment

Embodiment 1 to embodiment 4 is a kind of embodiment of layer-stranding cable in the present invention；Embodiment 5 is this hair The embodiment of bright middle preparation method.

Embodiment 1

See Fig. 1, a kind of layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating 6 outside cable core, and it is special Levy is the cable core by centrally located reinforcer 3, around three stranded Loose tubes 2 of reinforcer, all Loose tubes are whole The fixed bed 4 that body is enveloped, the packed layer 5 outside fixed bed are constituted, any two adjacent Loose tubes be it is mutually circumscribed, All there are eight optical fibers 1 in every Loose tube；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube Material is polypropylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable described above, it is characterised in that the Loose tube can be other many, every Loose tube Interior optical fiber at least has one.

Further, a kind of layer-stranding cable described above, it is characterised in that the adjacent Loose tube can also be The spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm two-by-two；Fixed bed extend into Loose tube formation In internal clearance.

A kind of layer-stranding cable described above, it is characterised in that the material of the packed layer is polypropylene or polyethylene, And the material of packed layer is differed with the material of fixed bed.

A kind of layer-stranding cable described above, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, its It is characterised by the cable core by centrally located reinforcer, around many stranded Loose tubes of reinforcer, all Loose tubes are whole Fixed bed that body is enveloped, the packed layer outside fixed bed are constituted, any two adjacent Loose tubes be it is mutually circumscribed, often All there is at least one optical fiber in root Loose tube；Fixed bed is liquid-tight envelope relative to internal Loose tube, fixed bed Material is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Embodiment 2

See Fig. 2, a kind of layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating 6 outside cable core, and it is special Levy is the cable core by centrally located reinforcer 3, around seven stranded Loose tubes 2 of reinforcer, all Loose tubes are whole The fixed bed 4 that body is enveloped is constituted, the Loose tube of arbitrary neighborhood be between Loose tube mutually nontangential and adjacent two-by-two between It is 0.2mm away from maximum, fixed bed is extend into the internal clearance of Loose tube formation, all has eight light guide fibres in every Loose tube Dimension 1；Fixed bed is liquid-tight envelope relative to internal Loose tube, and the material of fixed bed is polypropylene or polyethylene or poly- to benzene two Formic acid butanediol ester.

A kind of layer-stranding cable described above, it is characterised in that the Loose tube can be other many, every Loose tube Interior optical fiber at least has one.

A kind of layer-stranding cable described above, can also be that adjacent Loose tube is mutually circumscribed, and fixed bed is not extended into In the internal clearance formed to Loose tube.

Embodiment 3

See Fig. 3, a kind of layer-stranding cable, substantially with embodiment 2, difference is that wherein two Loose tubes are filled out Rope 7 is filled to be replaced；The material of gasket for packing is polypropylene or polyethylene.

A kind of layer-stranding cable in this embodiment, it includes cable core and extrusion molding is coated on sheath outside cable core Layer, it is characterised in that the cable core is by centrally located reinforcer, around reinforcer stranded at least one Loose tube, at least one Root gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, when having many Loose tubes, arbitrary neighborhood Loose tube is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, when having many gasket for packings, arbitrarily Adjacent gasket for packing is that the spacing maximum mutually between nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube with Gasket for packing is that the spacing maximum between mutually nontangential and adjacent Loose tube and gasket for packing is 0.2mm, and fixed bed extend into In the internal clearance that Loose tube, gasket for packing are formed, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube with The quantity sum of gasket for packing is not less than 3；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube and gasket for packing Material is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, a kind of layer-stranding cable described in this embodiment, it includes cable core and extrusion molding is coated on cable Restrictive coating outside core, it is characterised in that the cable core is by centrally located reinforcer, around stranded at least one of reinforcer Loose tube, at least one gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, and have many Loose tubes When, the Loose tube of arbitrary neighborhood is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is tangent, adjacent pine Sleeve pipe is tangent with gasket for packing, all has at least one optical fiber in every Loose tube；The quantity and gasket for packing of Loose tube Quantity sum be not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, and the material of fixed bed is poly- Propylene or polyethylene or polybutylene terephthalate (PBT).

Embodiment 4

See Fig. 4, a kind of layer-stranding cable, it includes cable core, the first protective layer 8 outside cable core, positioned at The second protective layer 9 and extrusion molding outside one protective layer are coated on the restrictive coating 6 outside the second protective layer, it is characterised in that the cable Core by centrally located reinforcer 3, around stranded five Loose tubes, 2, two gasket for packings 7 of reinforcer, by all Loose tubes and The fixed bed 4 that all gasket for packing integral coatings are lived is constituted, and the Loose tube of arbitrary neighborhood is mutual nontangential, arbitrary neighborhood two-by-two Loose tube is that mutually nontangential, arbitrary neighborhood gasket for packing is pine set mutually nontangential and adjacent two-by-two two-by-two with gasket for packing Spacing maximum between pipe is that the spacing maximum between 0.2mm, adjacent gasket for packing is 0.2mm, adjacent Loose tube and fills Spacing maximum between rope is 0.2mm, and fixed bed is extend into the internal clearance that Loose tube and gasket for packing are formed, every Loose tube Inside all there are eight optical fibers 1；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube and gasket for packing It is polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, the second protective layer Material 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.

A kind of layer-stranding cable described in this embodiment, it includes cable core, the first protection outside cable core Layer, the second protective layer outside the first protective layer and extrusion molding are coated on the restrictive coating outside the second protective layer, it is characterised in that The cable core is by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one gasket for packing, by institute The fixed bed for having Loose tube and all gasket for packing integral coatings to live is constituted, and when having many Loose tubes, the Loose tube of arbitrary neighborhood is Mutually the spacing maximum between nontangential and adjacent Loose tube is 0.2mm, and when having many gasket for packings, arbitrary neighborhood is filled out It is that spacing maximum mutually between nontangential and adjacent gasket for packing is 0.2mm to fill rope, and adjacent Loose tube is with gasket for packing Mutually the spacing maximum between nontangential and adjacent Loose tube and gasket for packing is 0.2mm, fixed bed extend into Loose tube, In the internal clearance that gasket for packing is formed, all there is at least one optical fiber in every Loose tube；The quantity and gasket for packing of Loose tube Quantity sum be not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, and the material of fixed bed is poly- Propylene or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, the material of the second protective layer It is steel band or aluminium strip.

Further, a kind of layer-stranding cable described in this embodiment, it includes cable core, outside cable core First 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 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 The fixed bed that all Loose tubes and all gasket for packing integral coatings fill rope, lived is constituted, when having many Loose tubes, arbitrary neighborhood Loose tube is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is that tangent, adjacent Loose tube is with gasket for packing Tangent, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube is not small with the quantity sum of gasket for packing In 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, the material of fixed bed be polypropylene or polyethylene or Polybutylene terephthalate (PBT)；The material of the 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, it is also possible to It is only one gasket for packing.

Certainly, a kind of layer-stranding cable in embodiment of the present invention 1 to embodiment 3 described in any embodiment, all The first protective layer and the second protective layer can be set between cable core and restrictive coating as embodiment 4；Further, also Can the first protective layer be only set between cable core and restrictive coating or the second protective layer is only set.

A kind of layer-stranding cable described in any of the above-described embodiment, can also set various protections outside restrictive coating Layer, such as first sets steel belt layer, then sets external sheath layer, so can more effectively protect optical fiber therein, makes mechanical resistance to compression etc. Performance is greatly enhanced；Nylon layer can also be set outside restrictive coating, the purpose of ant proof can be so reached；Etc., it is numerous.

A kind of layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the reinforcer is steel Silk or fiberglass-reinforced plastic lever.

As further simplifying, a kind of layer-stranding cable described in above-mentioned embodiment 1,2, it is characterised in that described Loose tube in cable core can also be and be arranged in parallel, and rather than stranded setting, be arranged in parallel the strand that can be saved in cabling device Attach together and 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, can be with It is further cost-effective.

As further simplifying, a kind of layer-stranding cable described in above-mentioned embodiment 3,4, it is characterised in that described Loose tube, gasket for packing in cable core can also be and be arranged in parallel, and rather than stranded setting, be arrangeding in parallel can save cabling device In stranding device, 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 Degree, can be further cost-effective.

A kind of layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the restrictive coating is low Cigarette Zero halogen flame resistance polyethylene or LLDPE or low density polyethylene (LDPE) or medium density polyethylene or high density polyethylene (HDPE).

A kind of layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the Loose tube is to change Property polypropylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable described in any of the above-described embodiment, it is characterised in that G.652 the optical fiber is 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 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, its feature exists Include following steps in it：

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 are in light UV solidification colorings are carried out on fine tinting machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；Eight times repeatedly, formed Eight optical fibers, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) is taken to be squeezed secondary coated Melted in the spiral shell chamber of molding machine, and add modified polypropene gross weight 1%~3% color masterbatch or poly terephthalic acid fourth two The color masterbatch of the 1%~3% of alcohol ester gross weight melts and stirs together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the optical fiber that the first step is formed to be penetrated the cavity inside original Loose tube In, the bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, Finished product Loose tube is formed, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length； Repeatedly for three times, three finished product Loose tubes 2 are formed；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever is taken to be placed on into as reinforcer 3 On the reinforcer discharge device of cable machine and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second strand First centre bore of matched moulds tool 42, the first interstitial hole after the 3rd stranded mould 43, the mistake that is then passed through inside extrusion head 51 Cable core hole 52；(2) finished product Loose tube 2 that is forming second step and being wound on the first disk tool 11 passes through the first scroll wheel groups 31 simultaneously Through the first edge hole 411 of the first stranded mould 41, it is then passed through the first edge hole 421 of the second stranded mould 42, then wears Cross the first holes around 431 of the 3rd stranded mould 43, then pass through crossing cable core hole and ensuring finished product pine inside extrusion head 51 Sleeve pipe is located at outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the second disk tool 12 is rolled by second Wheel group 32 simultaneously passes through the first edge hole 411 of the first stranded mould 41, is then passed through the first edge hole of the second stranded mould 42 421st, the first holes around 431 of the 3rd stranded mould 43 is subsequently passed through, is then passed through and cross cable core hole simultaneously inside extrusion head 51 Ensure that finished 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 leads to Cross the 3rd scroll wheel groups 33 and through the first edge hole 411 of the first stranded mould 41, be then passed through the of the second stranded mould 42 One edge hole 421, the first holes around 431 for being subsequently passed through the 3rd stranded mould 43, then pass through mistake inside extrusion head 51 Cable core hole simultaneously ensures that finished product Loose tube is located at outside reinforcer；Make adjacent Loose tube tangent；（3）Drew adding for extrusion head Strong part and Loose tube, and make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, will In the injecting hole 53 of polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head of melting, cable core hole is being crossed Right-hand member exit be close into the polypropylene of melting or polyethylene or polybutylene terephthalate (PBT) using air extractor Fixed bed is formed outside product Loose tube；（4）The bar for taking polypropylene or polyethylene formation is filled in formation filling outside fixed bed Layer；And then form cable core；The material of packed layer is differed with the material of fixed bed；

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 The top of the first pipe discharging mechanism 21；Second disk tool 12 can be rotated relative to the second fixed pipe discharging mechanism 22, the second scroll wheel Group 32 is located 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 Three scroll wheel groups 33 are located at the top of the 3rd pipe discharging mechanism 23；Along the release direction of Loose tube：3rd pipe discharging mechanism is located at second The front of pipe discharging 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 The rear of tool, the second stranded mould are located at the front of the first stranded mould, the 3rd stranded mould before the second stranded mould Side, extrusion head are located at the 3rd stranded mould front；First medium pore, first edge hole be through the first stranded mould and One medium pore 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 the One spacing；It is that first centre bore, the first edge hole are through the second stranded mould and the first centre bore is located at the second stranded mould Center, 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 not phases Logical, the distance of the first centre bore central axis and the first edge hole central axis is the second spacing；First interstitial hole, first week The center that hole is through the second stranded mould and the first interstitial hole is located at the second stranded mould is enclosed, the first holes around has multiple And be distributed in outside the first interstitial hole and the first holes around and the first interstitial hole are not communicated with, the first edge hole have it is multiple and It is distributed in outside the first centre bore and the first edge hole and the first centre bore is not communicated with, the first interstitial hole central axis and the The distance of one holes around central axis is the 3rd spacing；The spacing of first the second spacing of spacing ＞ ＞ the 3rd；The injection of extrusion head Hole 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 or medium density polyethylene or high density polyethylene (HDPE) by sheath extruding machine extrusion molding be coated on cable core that the 3rd step formed it Outward, restrictive coating is formed, 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 to coil Loose tube disk tool, 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 the 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 are in light UV solidification colorings are carried out on fine tinting machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, formed Many optical fibers, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) is taken to be squeezed secondary coated Melted in the spiral shell chamber of molding machine, and add modified polypropene gross weight 1%~3% color masterbatch or poly terephthalic acid fourth two The color masterbatch of the 1%~3% of alcohol ester gross weight melts and stirs together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the optical fiber that the first step is formed to be penetrated the cavity inside original Loose tube In, the bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, Finished product Loose tube is formed, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, Optical fiber in finished product Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on stranding as reinforcer On the reinforcer discharge device of machine and pull out the first medium pore 410 through the first stranded mould 41, to then pass through second stranded First centre bore of mould 42, after the 3rd stranded mould 43 the first interstitial hole, be then passed through inside extrusion head 51 cross cable Core bore 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 Have 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 the 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 made first with rotating mechanism Stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system, by the polypropylene for melting or polyethylene or poly- terephthaldehyde In the injecting hole 53 of sour butanediol ester injection extrusion head, melting is made using air extractor in the right-hand member exit for crossing cable core hole Polypropylene 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 pine The release direction of sleeve pipe：Pipe discharging mechanism is located at the rear of the first stranded mould, the second stranded mould and is located at the first stranded mould Front, the 3rd stranded mould are located at the front of the second stranded mould, extrusion head and are located at the 3rd stranded mould front；First center Hole, first edge hole are through the first stranded mould and the first medium pore is located at the center of the first stranded mould, first edge Hole has multiple and is distributed in outside the first medium pore and first edge hole is not communicated with the first medium pore, the first medium pore Central axis is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through second Stranded mould and the first centre bore is located at the center of the second stranded mould, the first edge hole has multiple and is distributed in first Outside heart hole and the first edge hole and the first centre bore are not communicated with, the first centre bore central axis and the first edge hole center The distance of axis is the second spacing；First interstitial hole, the first holes around are through the second stranded mould and the first middle hole position In the center of the second stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and the first holes around and the One interstitial 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 first Centre bore is not communicated with, and the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First The spacing of the second spacing of 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 or medium density polyethylene or high density polyethylene (HDPE) by sheath extruding machine extrusion molding be coated on cable core that the 3rd step formed it Outward, restrictive coating is formed, 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 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 are in light UV solidification colorings are carried out on fine tinting machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, formed Many optical fibers, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) is taken to be squeezed secondary coated Melted in the spiral shell chamber of molding machine, and add modified polypropene gross weight 1%~3% color masterbatch or poly terephthalic acid fourth two The color masterbatch of the 1%~3% of alcohol ester gross weight melts and stirs together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the optical fiber that the first step is formed to be penetrated the cavity inside original Loose tube In, the bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, Finished product Loose tube is formed, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, Optical fiber in finished product Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on stranding as reinforcer On the reinforcer discharge device of machine and pull out the first medium pore 410 through the first stranded mould 41, to then pass through second stranded First centre bore of mould 42, after the 3rd stranded mould 43 the first interstitial hole, be then passed through inside extrusion head 51 cross cable Core bore 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 Have 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 the 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 the no more than gap of 0.2mm between adjacent Loose tube；（3）Drew the reinforcer and pine set of extrusion head Pipe, and make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, poly- third for melting In the injecting hole 53 of alkene or polyethylene or polybutylene terephthalate (PBT) injection extrusion head, the right-hand member outlet in cable core hole is being crossed Place makes the polypropylene of melting or polyethylene or polybutylene terephthalate (PBT) be close to outside finished product Loose tube using air extractor And the fixed bed of integration is formed in the internal clearance formed into Loose tube；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 pine The release direction of sleeve pipe：Pipe discharging mechanism is located at the rear of the first stranded mould, the second stranded mould and is located at the first stranded mould Front, the 3rd stranded mould are located at the front of the second stranded mould, extrusion head and are located at the 3rd stranded mould front；First center Hole, first edge hole are through the first stranded mould and the first medium pore is located at the center of the first stranded mould, first edge Hole has multiple and is distributed in outside the first medium pore and first edge hole is not communicated with the first medium pore, the first medium pore Central axis is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through second Stranded mould and the first centre bore is located at the center of the second stranded mould, the first edge hole has multiple and is distributed in first Outside heart hole and the first edge hole and the first centre bore are not communicated with, the first centre bore central axis and the first edge hole center The distance of axis is the second spacing；First interstitial hole, the first holes around are through the second stranded mould and the first middle hole position In the center of the second stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and the first holes around and the One interstitial 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 first Centre bore is not communicated with, and the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First The spacing of the second spacing of 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 or medium density polyethylene or high density polyethylene (HDPE) by sheath extruding machine extrusion molding be coated on cable core that the 3rd step formed it Outward, restrictive coating is formed, the making of layer-stranding cable is completed.

Or, in optical cable described above or fiber optic cable production method, 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 cycloalkanes of commercially available 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 2400 hours aging, 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 substantially 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 The combustion test that GB2408-80/I specifies.

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 is wrapped up, with the faster advantage of speed of production, reached 250m/ The most fast stranding speed of min, and stranding speed only 80m/min of the prior art；Hence it is evident that save electric power input and Artificial input.

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

The present invention does experiment in being placed on -50 to+90 DEG C of temperature test chambers, 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 dissect, 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 has simple structure, is easy to making, more cost-effective, light after temperature change wide scope change Stable performance is learned, the machinery equipment for using is simple, less investment；The main Advantageous such as block-water effect is excellent, cable core length understands 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 (2)

1. 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%；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 modified polypropene gross weight 1%~3% color masterbatch or polybutylene terephthalate (PBT) The color masterbatch of the 1%~3% of gross weight melts and stirs together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while during the optical fiber that the first step is formed penetrated into the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, is formed Finished product Loose tube, the length of the optical fiber in 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) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer 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 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, is then passed 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 synchronization with rotating mechanism Rotate, in the injecting hole of polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head that will be melted, in mistake The right-hand member exit in cable core hole makes the polypropylene of melting or polyethylene or polybutylene terephthalate (PBT) 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 at the 3rd stranded mould front；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 is not communicated with the first medium pore, the first medium pore central shaft Line is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore is located at the center of the second stranded mould, 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 low density polyethylene (LDPE) or medium density polyethylene or High density polyethylene (HDPE) is coated on outside the cable core that the 3rd step is formed by sheath extruding machine extrusion molding, forms restrictive coating, completes layer The making of stranded cables.

2. 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%；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 modified polypropene gross weight 1%~3% color masterbatch or polybutylene terephthalate (PBT) The color masterbatch of the 1%~3% of gross weight melts and stirs together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while during the optical fiber that the first step is formed penetrated into the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, is formed Finished product Loose tube, the length of the optical fiber in 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) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer 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 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, is then passed through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Make to have between adjacent Loose tube and be not more than The gap of 0.2mm；（3）The reinforcer and Loose tube of extrusion head were drawn, and made the first stranded mould, second with rotating mechanism Stranded mould, the 3rd stranded mould synchronous axial system, polypropylene or polyethylene or the polybutylene terephthalate (PBT) note that will be melted Enter in the injecting hole of extrusion head, the polypropylene of melting or polyethylene are made using air extractor in the right-hand member exit for crossing cable core hole Or polybutylene terephthalate (PBT) is close to outside finished product Loose tube and enters and integration is formed in the internal clearance that Loose tube is formed 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 at the 3rd stranded mould front；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 is not communicated with the first medium pore, the first medium pore central shaft Line is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore is located at the center of the second stranded mould, 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 low density polyethylene (LDPE) or medium density polyethylene or High density polyethylene (HDPE) is coated on outside the cable core that the 3rd step is formed by sheath extruding machine extrusion molding, forms restrictive coating, completes layer The making of stranded cables.