CN104749730B

CN104749730B - A kind of manufacture method of layer-stranding cable

Info

Publication number: CN104749730B
Application number: CN201510196823.0A
Authority: CN
Inventors: 方洁明
Original assignee: Dongguan Nan Fang Industrial Co Ltd
Current assignee: Dongguan Nan Fang Industrial Co., Ltd.
Priority date: 2015-04-23
Filing date: 2015-04-23
Publication date: 2017-08-22
Anticipated expiration: 2035-04-23
Also published as: CN104749730A; CN107144932A; CN106932876A

Abstract

The invention belongs to technical field of cables, more particularly, to the manufacture method of layer-stranding cable, it is characterised in that it includes following steps：The step of colouring optical fibres, Loose tube forming step, cable core forming step, restrictive coating forming step.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

A kind of manufacture method of layer-stranding cable

Technical field

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

Background technology

People's Republic of China's post and telecommunications professional standard：The basic of layer-stranding cable is defined in YD/T 901-2009 Structure and requirement, its layer-stranding cable be it is stranded around center reinforcemen by many Loose tubes and presumable gasket for packing, then Yarn class material formation cable core is dressed outside in intertwist body, makes cable core structure stable, then coats protective layer forming layer again in cable core bag Stranded cables, 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, requires to become with low temperature again and shrinks Or expansion character, if temperature, which becomes, shrinks excessive, easily cause and stab Loose tube, fibercuts is caused what is more, have a strong impact on communication； If warm variable expansion is excessive, wrapping can be made not tight, insecure, cause intertwist body in coiling or scattering in, become Loose tube Shape causes fiber transmission performance to reduce.On the other hand, in order that optical cable core reaches effectively blocks water, it is necessary to inside and outside in intertwist body The material that blocks water all is filled, the filling for the material that blocks water needs the equipment of specialty, and is difficult to reach preferable block-water effect.Intertwist body Due to being wrapped up using yarn class material, therefore, it is impossible to learn the length of intertwist body by easy method.Therefore, people expect have Better method solves the above problems.

The content of the invention

In order to solve the above problems, the purpose of the present invention is to disclose a kind of manufacture method of layer-stranding cable；It is to use Following technical scheme is realized.

A kind of manufacture 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 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 1%~3% color masterbatch or poly terephthalic acid fourth two of modified polypropene gross weight 1%~3% color masterbatch of alcohol ester gross weight melts and stirred together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the cavity that the optical fiber that the first step is formed is penetrated inside original Loose tube In, drawing original Loose tube makes the bosh that the optical fiber in cavity is moved through 20~40 DEG C with original Loose tube, The length of the optical fiber formed in finished product Loose tube, 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) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on stranding 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 formation and be wound on disk tool on finished product Loose tube by scroll wheel groups and 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, then passes 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 the first stranded mould, the second stranded mould, the 3rd stranded mould are remained stationary as, will In the injecting hole of polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head of melting, cable core hole is being crossed Right-hand member exit makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting be close to finished product using air extractor Fixed bed is formed outside 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 in front of the 3rd stranded mould；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 and the first medium pore are not communicated with, the first medium pore The distance of central axis and first edge hole central axis is the first spacing；First centre bore, the first edge hole are through second Stranded mould and the first centre bore be located at the second stranded mould center, the first edge hole has multiple and is distributed in first Outside heart hole and the first edge hole is not communicated with the first centre bore, 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；First stranded mould with The distance between second stranded mould is 1000~2000mm, and the distance between the second stranded mould and the 3rd stranded mould is 500~1000mm, the distance between the first stranded mould and the second stranded mould are the second stranded mould and the 3rd stranded mould The distance between 2~5 times；

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 the formation of the 3rd step cable core it Outside, restrictive coating is formed, 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, and its feature exists Integrally wrapped by centrally located reinforcer 3, around three stranded Loose tubes 1 of reinforcer, by all Loose tubes in the cable core The fixed bed 4 covered, the packed layer 5 outside fixed bed are constituted, any two adjacent Loose tubes be it is mutually circumscribed, every All there are eight optical fibers 2 in 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).

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, and its feature exists Integrally wrapped by centrally located reinforcer 3, around seven stranded Loose tubes 1 of reinforcer, by all Loose tubes in the cable core The fixed bed 4 covered is constituted, the Loose tube of arbitrary neighborhood be spacing two-by-two mutually between nontangential and adjacent Loose tube most Big value is 0.2mm, and fixed bed is extend into the internal clearance of Loose tube formation, all has eight optical fibers 2 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 poly terephthalic acid Butanediol ester.

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 rope 7 are replaced；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, protected positioned at first The second protective layer 9 and extrusion molding outside sheath 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 five stranded Loose tubes 1 of reinforcer, two gasket for packings 7, by all Loose tubes and all The fixed bed 4 that gasket for packing integral coating is lived is constituted, and the Loose tube of arbitrary neighborhood is that mutually nontangential, arbitrary neighborhood pine covers two-by-two Pipe and gasket for packing be two-by-two mutually nontangential, arbitrary neighborhood gasket for packing be two-by-two mutually nontangential and adjacent Loose tube it Between spacing maximum be 0.2mm, the spacing maximum between adjacent gasket for packing be 0.2mm, adjacent Loose tube and gasket for packing it Between spacing maximum be 0.2mm, fixed bed extend into Loose tube and gasket for packing formation internal clearance in, in every Loose tube all With eight optical fibers 2；Fixed bed is that liquid is sealed 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 first protective layer is waterstop, the material of the second protective layer It 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, a kind of manufacture method of layer-stranding cable described in embodiment 1, its spy Levy and be 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%；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 1%~3% color masterbatch or poly terephthalic acid fourth two of modified polypropene gross weight 1%~3% color masterbatch of alcohol ester gross weight melts and stirred together；Stretched by the extrusion head of secondary coated extruding machine Go out the internal original Loose tube with cavity, while the cavity that the optical fiber that the first step is formed is penetrated inside original Loose tube In, drawing original Loose tube makes the bosh that the optical fiber in cavity is moved through 20~40 DEG C with original Loose tube, The length of the optical fiber formed in finished product Loose tube, 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) it is second step being formed and be wound on the first disk tool 11 on finished product Loose tube 2 by 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, then passes through and crosses 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 the first stranded mould, the second stranded mould, the 3rd stranded mould are remained stationary as, by the polypropylene of melting Or in the injecting hole 53 of polyethylene or polybutylene terephthalate (PBT) injection extrusion head, crossing the right-hand member exit in cable core hole The polypropylene or polyethylene or polybutylene terephthalate (PBT) for making melting using air extractor are close to finished product Loose tube profile Into 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 The top of 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 and are located at before the second stranded mould Side, extrusion head are located in front of the 3rd stranded mould；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；The distance between first stranded mould and the second stranded mould are 1000~2000mm, the The distance between two stranded moulds and the 3rd stranded mould are 500~1000mm, the first stranded mould and the second stranded mould it Between distance be 2~5 times of the distance between the second stranded mould and the 3rd stranded mould；

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 manufacture method of another layer-stranding cable described in embodiment 1, it is characterised in that it includes following step Suddenly：

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) it is second step being formed and be wound on the first disk tool 11 on finished product Loose tube 2 by 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, then passes through and crosses 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 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 protects the first stranded mould, the second stranded mould, the 3rd stranded mould Hold motionless, in the injecting hole 53 that the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting are injected to extrusion head, Air extractor is used to make the polypropylene or polyethylene or polybutylene terephthalate of melting in the right-hand member exit for crossing cable core hole Ester is close to outside finished product Loose tube and entered the fixed bed that integration is formed in the internal clearance of Loose tube formation；（4）Take polypropylene Or the bar of polyethylene formation is filled in outside fixed bed and forms packed layer；And then form cable core；The material of packed layer is with consolidating The material of given layer is differed；

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

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on stranding 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 Tool 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 makes the first stranded mould, Two stranded moulds, the 3rd stranded mould are remained stationary as, and the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting are noted In the injecting hole 53 for entering extrusion head, air extractor is used to make the polypropylene or poly- second of melting in the right-hand member exit for crossing cable core hole Alkene or polybutylene terephthalate (PBT) are close to outside finished product Loose tube and form fixed bed；And then form cable core；

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

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on stranding 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 Tool 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 no more than 0.2mm gap between adjacent Loose tube；（3）Drew the reinforcer and pine set of extrusion head Pipe, and remains stationary as the first stranded mould, the second stranded mould, the 3rd stranded mould, by the polypropylene or polyethylene of melting or In the injecting hole 53 of polybutylene terephthalate (PBT) injection extrusion head, filled in the right-hand member exit for crossing cable core hole using pumping Putting makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting be close to outside finished product Loose tube and enter Loose tube The fixed bed of integration is formed in the internal clearance of formation；And then form cable core；

The manufacture method of a kind of layer-stranding cable described in embodiment 3, it is characterised in that it includes following steps：

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on stranding 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 Tool 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 when being located at adjacent position with many Loose tubes and Loose tube；（3）Take polypropylene or poly- second The gasket for packing that alkene material makes, through the first edge hole 411 of the first stranded mould 41, is 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 gasket for packing is located at outside reinforcer；There are many gasket for packings and gasket for packing to make when being located at adjacent position adjacent Gasket for packing it is tangent, gasket for packing and adjacent Loose tube are tangent；（4）Drew the reinforcer, gasket for packing and pine set of extrusion head Pipe, and remains stationary as the first stranded mould, the second stranded mould, the 3rd stranded mould, by the polypropylene or polyethylene of melting or In the injecting hole 53 of polybutylene terephthalate (PBT) injection extrusion head, filled in the right-hand member exit for crossing cable core hole using pumping Putting makes the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting be close to formation outside finished product Loose tube and gasket for packing Fixed bed；And then form cable core；The quantity of Loose tube and the quantity sum of gasket for packing are not less than 3；

The manufacture method of another layer-stranding cable described in embodiment 3, it is characterised in that it includes following step Suddenly：

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken as reinforcer and is placed on stranding 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 Tool 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；When being located at adjacent position with many Loose tubes and Loose tube, the nontangential and adjacent Loose tube of adjacent Loose tube it Between gap be not more than 0.2mm；（3）The gasket for packing for taking polypropylene or polythene material to make, through the first stranded mould 41 First edge hole 411, the first edge hole 421 for being then passed through the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 One holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product gasket for packing be located at reinforcer outside；Have When many gasket for packings and gasket for packing are located at adjacent position, adjacent gasket for packing is nontangential, and the gap between adjacent gasket for packing is not More than 0.2mm, the gap between gasket for packing and adjacent Loose tube is not more than 0.2mm；（4）Drew the reinforcement of extrusion head Part, gasket for packing and Loose tube, and the first stranded mould, the second stranded mould, the 3rd stranded mould are remained stationary as, by the poly- of melting In the injecting hole 53 of propylene or polyethylene or polybutylene terephthalate (PBT) injection extrusion head, go out in the right-hand member for crossing cable core hole The polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting is set to be close to finished product Loose tube using air extractor at mouthful And gasket for packing is outer and enters the fixed bed that integration is formed in the internal clearance of Loose tube formation；And then form cable core；Loose tube Quantity and the quantity sum of gasket for packing are not less than 3；

The manufacture method of a kind of layer-stranding cable described in embodiment 4, it is characterised in that it includes following steps：

4th step：The step of forming the first protective layer：Waterstop is taken longitudinally to be coated on the profile of the cable core of the 3rd step formation Into the first protective layer, the overlapping widths of waterstop lap-joint are 2~4mm；

5th step：The step of forming the second protective layer：Take steel band or aluminium strip to be longitudinally coated on the first of the formation of the 4th step to protect The second protective layer is formed outside sheath, when the first protective layer diameter is not more than 8.5mm, the overlapping width of steel band or aluminium strip lap-joint 20% of degree not less than the first protective layer diameter；When the first protective layer diameter is more than 8.5mm, the weight of steel band or aluminium strip lap-joint Folded width is not less than 5mm；

6th 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) are coated on the second guarantor of the 5th step formation by sheath extruding machine extrusion molding Outside sheath, restrictive coating is formed, the making of layer-stranding cable is completed.

The manufacture method of another layer-stranding cable described in embodiment 4, it is characterised in that it includes following step Suddenly：

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 1000 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 method for the present invention, the distance between the first stranded mould and the second stranded mould are the second stranded mould and the 2~5 times of the distance between three stranded moulds；It ensure that in layer-stranding cable Loose tube and presumable gasket for packing in cable core Stability, will not deform in fixed layer formation process, be formed after finished cable, can also keep excellent mechanical 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.

Or, in the manufacture method of layer-stranding cable or layer-stranding cable described above, the restrictive coating is by following heavy Measure the raw material composition of part：Polyethylene：65 parts, polypropylene：6 parts, antioxidant 1010：2 parts, aluminium hydroxide：10 parts, HK types resist it is quiet Electric agent：1 part, ethyl acetate：3 parts, carbon black：2 parts, titanium dioxide：1 part, sodium rice silica：8 parts, Tissuemat E：2 parts.It is above-mentioned to match somebody with somebody Side has excellent processing characteristics, and in 100m/min process velocities, jacket surface is still smooth, rounding, pin-free；Through surveying Examination, material oxygen index (OI) >=41 are made after the thick sheaths of 1.6mm in the interval that space potential is 16~50KV, long-term by 700 days Continuously use, the vestige of galvano-cautery is had no on sheath.

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

1. a kind of 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 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 the first stranded mould, the second stranded mould, the 3rd stranded mould are remained stationary as, it will melt Polypropylene or polyethylene or polybutylene terephthalate (PBT) injection extrusion head injecting hole in, crossing the right-hand member in cable core hole 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；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；First stranded mould and second is twisted The distance between matched moulds tool is 1000~2000mm, the distance between the second stranded mould and the 3rd stranded mould for 500~ 1000mm, the distance between the first stranded mould and the second stranded mould are between the second stranded mould and the 3rd stranded mould 2~5 times of distance；

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 by sheath extruding machine extrusion molding outside the cable core of the 3rd step formation, is formed restrictive coating, is completed layer The making of stranded cables.

2. a kind of preparation method of layer-stranding cable, it is characterised in that it includes following steps：

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）Drew the reinforcer and Loose tube of extrusion head, and make the first stranded mould, the second stranded mould, 3rd stranded mould is remained stationary as, and the polypropylene or polyethylene or polybutylene terephthalate (PBT) of melting are injected into extrusion head In injecting hole, air extractor is used to make the polypropylene or polyethylene of melting or poly- terephthaldehyde in the right-hand member exit for crossing cable core hole Sour butanediol ester is close to outside finished product Loose tube and entered the fixed bed that integration is formed in the internal clearance of Loose tube formation；And then Form cable core；