CN106932876A

CN106932876A - A kind of manufacture method of layer-stranding cable

Info

Publication number: CN106932876A
Application number: CN201710299664.6A
Authority: CN
Inventors: 吴俊�
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-23
Filing date: 2015-04-23
Publication date: 2017-07-07
Also published as: CN104749730B; CN104749730A; CN107144932A

Abstract

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

The application is entitled：A kind of manufacture method of layer-stranding cable, the applying date be：On 04 23rd, 2015, application Number it is：The divisional application of 201510196823.0 application for a patent for invention.

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 is dressed outside in intertwist body and form cable core, make cable core structure stabilization, then coat 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 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 the 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 of 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 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 the first stranded mould, the second stranded mould, the 3rd stranded mould are remained stationary as, 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 of melting or polyethylene or polybutylene terephthalate (PBT) 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 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；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 LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on outside the cable core that the 3rd step is formed by sheath extruding machine extrusion molding, shape Into restrictive coating, 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 the embodiment of layer-stranding cable in the present invention；During embodiment 5 is the present invention The embodiment of preparation method.

Embodiment 1

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

Layer-stranding cable described above, it is characterised in that the Loose tube can be other many, in 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 for covering, 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 liquid-tight envelope, the material of fixed bed relative to internal Loose tube It is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Embodiment 2

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

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

Embodiment 3

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

Layer-stranding cable in this embodiment, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, its It is characterised by that the cable core is filled out by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one The fixed bed that all Loose tubes and gasket for packing integral coating fill rope, lived is constituted, 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 mutually nontangential and adjacent Loose tube and gasket for packing is 0.2mm, and fixed bed extend into loose set In the internal clearance that pipe, gasket for packing are formed, 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 liquid-tight envelope 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, and when having many gasket for packings, 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 Amount sum is 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 polypropylene Or polyethylene or polybutylene terephthalate (PBT).

Embodiment 4

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

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

Layer-stranding cable described in this embodiment, it includes cable core, the first protective layer outside cable core, position The second protective layer and extrusion molding outside the first protective layer are coated on the restrictive coating outside the second 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, and when having many Loose tubes, 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 Spacing maximum between tangent and adjacent Loose tube and gasket for packing is 0.2mm, and fixed bed extend into Loose tube, filling Restrict in the internal clearance for being 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 Amount sum is 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 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.

Further, the 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 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, and when having many gasket for packings, 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 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, and the material of fixed bed is polypropylene or polyethylene or poly- right Benzene dicarboxylic acid butanediol ester；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, the layer-stranding cable in embodiment of the present invention 1 to 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 various protective layers, such as outside restrictive coating Steel belt layer is first set, then external sheath layer is set, so can more effectively protect optical fiber therein, 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 that, rather than stranded setting, 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 is cost-effective.

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 that, rather than stranded setting, 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 With further cost-effective.

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

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add 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；Repeatedly Three times, form three finished product Loose tubes 2；

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

Wherein, the first disk tool 11 can be rotated relative to the first fixed pipe discharging mechanism 21, and the first scroll wheel groups 31 are located at first The top of pipe discharging mechanism 21；Second disk tool 12 can be rotated relative to the second fixed pipe discharging mechanism 22, the second scroll wheel groups 32 Positioned at the top of the second pipe discharging mechanism 22；3rd disk tool 13 can be rotated relative to the 3rd fixed pipe discharging mechanism 23, the 3rd rolling Driving wheel group 33 is located at the top of the 3rd pipe discharging mechanism 23；Along the release direction of Loose tube：3rd pipe discharging mechanism puts pipe positioned at second The front of mechanism, the second pipe discharging mechanism are located at the front of the first pipe discharging mechanism, the first pipe discharging mechanism and are located at the first stranded mould Rear, the second stranded mould are located at the front of the first stranded mould, the 3rd stranded mould and are located at the front of the second stranded mould, squeeze Molding machine head is located at the 3rd stranded mould front；First medium pore, first edge hole be through the first stranded mould and in first Central aperture is located at the center of the first stranded mould, and first edge hole has multiple and is distributed in outside the first medium pore and first edge Hole is not communicated with the first medium pore, between the distance of the first medium pore central axis and first edge hole central axis is first Away from；First centre bore, the first edge hole are through the second stranded mould and the first centre bore is located in the second stranded mould Centre, the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore are to be not communicated with , the distance of the first centre bore central axis and the first edge hole central axis is the second spacing；First interstitial hole, around first Hole is through the second stranded mould and the first interstitial hole is located at the center of the second stranded mould, the first holes around have it is multiple and It is distributed in outside the first interstitial hole and the first holes around is not communicated with the first interstitial hole, the first edge hole has multiple and divides Cloth is outside the first centre bore and the first edge hole is not communicated with the first centre bore, the first interstitial hole central axis and first The distance of holes around central axis is the 3rd spacing；The spacing of first the second spacing of spacing ＞＞ the 3rd；The injecting hole of extrusion head It is connected to cable core hole excessively logical；The distance between first stranded mould and the second stranded mould are 1000~2000mm, second The distance between stranded mould and the 3rd stranded mould are 500~1000mm, between the first stranded mould and the second stranded mould 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 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 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 are taken and is placed on cable-former as reinforcer 3 Reinforcer discharge device on and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould Tool 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through extrusion head 51 inside mistake cable core Hole 52；(2) finished product Loose tube 2 that is forming second step and being wound on the first disk tool 11 is by the first scroll wheel groups 31 and passes through The first edge hole 411 of the first stranded mould 41, the first edge hole 421 for being then passed through the second stranded mould 42, it is subsequently passed through First holes around 431 of three stranded moulds 43, then pass through crossing inside extrusion head 51 and cable core hole and ensure finished product Loose tube Outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the second disk tool 12 passes through the second scroll wheel groups 32 and through the first stranded mould 41 first edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, connect The first holes around 431 through the 3rd stranded mould 43, then pass through crossing cable core hole and ensuring into inside extrusion head 51 Product Loose tube is located at outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the 3rd disk tool 13 passes through the 3rd Scroll wheel groups 33 simultaneously pass through the first edge hole 411 of the first stranded mould 41, are then passed through the first edge of the second stranded mould 42 Hole 421, the first holes around 431 for being subsequently passed through the 3rd stranded mould 43, to then pass through and cross cable core hole inside extrusion head 51 And ensure that finished product Loose tube is located at outside reinforcer；Make that there is the no more than gap of 0.2mm between adjacent Loose tube；（3）Lead The reinforcer and Loose tube of extrusion head are introduced through, and the first stranded mould, the second stranded mould, the 3rd stranded mould is kept not It is dynamic, in the injecting hole 53 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 The fixed bed of integration is formed in the internal clearance for being attached to outside finished product Loose tube and being formed into Loose tube；（4）Take polypropylene or poly- The bar that ethene is formed forms packed layer outside being filled in fixed bed；And then form cable core；The material and fixed bed of packed layer Material differ；

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) 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 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； Make adjacent Loose tube tangent；（3）The reinforcer and Loose tube of extrusion head were drawn, and twists the first stranded mould, second Matched moulds tool, the 3rd stranded mould are remained stationary as, and polypropylene or polyethylene or the polybutylene terephthalate (PBT) injection that will be melted are squeezed In the injecting hole 53 of molding machine head, cross the right-hand member exit in cable core hole using air extractor make the polypropylene of melting or polyethylene or Polybutylene terephthalate (PBT) is close to outside finished product Loose tube and forms 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) 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 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； Make that there is the no more than gap of 0.2mm between adjacent Loose tube；（3）The reinforcer and Loose tube of extrusion head were drawn, and Remain stationary as the first stranded mould, the second stranded mould, the 3rd stranded mould, the polypropylene or polyethylene or poly- to benzene that will be melted In the injecting hole 53 of dioctyl phthalate butanediol ester injection extrusion head, make to melt using air extractor in the right-hand member exit for crossing cable core hole It is outer and into Loose tube formation that the polypropylene or polyethylene or polybutylene terephthalate (PBT) for melting are close to finished product Loose tube The fixed bed of integration is formed in internal clearance；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) 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 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； Make adjacent Loose tube tangent when being located at adjacent position with many Loose tubes and Loose tube；（3）Take polypropylene or polyethylene material Expect the gasket for packing for making, through the first edge hole 411 of the first stranded mould 41, be then passed through the first side of the second stranded mould 42 Along hole 421, 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 simultaneously ensures that finished product gasket for packing is located at outside reinforcer；Have many gasket for packings and gasket for packing makes adjacent filling out when being located at adjacent position Fill rope it is tangent, gasket for packing is tangent with adjacent Loose tube；（4）Reinforcer, gasket for packing and the Loose tube of extrusion head were drawn, and Remain stationary as the first stranded mould, the second stranded mould, the 3rd stranded mould, the polypropylene or polyethylene or poly- to benzene that will be melted In the injecting hole 53 of dioctyl phthalate butanediol ester injection extrusion head, make to melt using air extractor in the right-hand member exit for crossing cable core hole The polypropylene or polyethylene or polybutylene terephthalate (PBT) for melting are close to outside finished product Loose tube and gasket for packing and form fixed bed； And then form cable core；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；

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) 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 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； When being located at adjacent position with many Loose tubes and Loose tube, between the nontangential and adjacent Loose tube of adjacent Loose tube Gap is not more than 0.2mm；（3）The gasket for packing that polypropylene or polythene material make is taken, through the first of the first stranded mould 41 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 first week Enclose hole 431, then pass through crossing cable core hole and ensuring that finished product gasket for packing is located at outside reinforcer inside extrusion head 51；There are many When gasket for packing 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 reinforcer of extrusion head, filled out Rope and Loose tube are filled, and remains stationary as the first stranded mould, the second stranded mould, the 3rd stranded mould, the polypropylene that will be melted 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 of melting or polyethylene or polybutylene terephthalate (PBT) is set to be close to finished product Loose tube and fill out using air extractor The fixed bed of integration is formed in the internal clearance for filling outside rope and being formed into Loose tube；And then form cable core；The quantity of Loose tube Quantity sum with gasket for packing is 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：Take outside waterstop is longitudinally coated on the cable core of the 3rd step formation and form the One protective layer, the overlapping widths of waterstop lap-joint are 2~4mm；

5th step：The step of forming the second protective layer：Take the first protective layer that steel band or aluminium strip are longitudinally coated on the formation of the 4th step Outside form the second protective layer, when the first protective layer diameter is not more than 8.5mm, the overlapping widths of steel band or aluminium strip lap-joint are not Less than the 20% of the first protective layer diameter；When the first protective layer is with diameter greater than 8.5mm, the overlap of steel band or aluminium strip lap-joint is wide Degree 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 Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on the second protective layer that the 5th step is formed by sheath extruding machine extrusion molding Outside, restrictive coating is formed, complete the making of layer-stranding cable.

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 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.

1000 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 method for the present invention, the distance between the first stranded mould and the second stranded mould are the second stranded mould and 2~5 times of the distance between three stranded moulds；Ensure that in layer-stranding cable Loose tube and presumable gasket for packing in cable core Stability, deformation will not occurs in fixed layer formation process, after forming 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 described above or layer-stranding cable, 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 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

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

4th step：Restrictive coating forming step：Jacket layer material is coated on the cable that the 3rd step is formed by sheath extruding machine extrusion molding Outside core, restrictive coating is formed, complete the making of layer-stranding cable；The jacket layer material be LLDPE or It is made up of the raw material of following weight portion：Polyethylene：65 parts, polypropylene：6 parts, antioxidant 1010：2 parts, aluminium hydroxide：10 parts, HK type antistatic additive：1 part, ethyl acetate：3 parts, carbon black：2 parts, titanium dioxide：1 part, sodium rice silica：8 parts, Tissuemat E：2 Part.

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) 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）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, polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head that will be melted In injecting hole, the polypropylene of melting or polyethylene or poly- terephthaldehyde are made using air extractor in the right-hand member exit for crossing cable core hole The fixed bed of integration is formed in the internal clearance that sour butanediol ester is close to outside finished product Loose tube and is formed into Loose tube；And then Form cable core；