CN103714909A - Nylon photoelectric butterfly-shaped cable and manufacturing method thereof - Google Patents
Nylon photoelectric butterfly-shaped cable and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a nylon photoelectric butterfly-shaped cable and a manufacturing method thereof. The cable comprises optical fibers, two copper stranded wires are symmetrically arrayed on the two sides of each optical fiber in parallel, an integrated type inner protective jacket layer is arranged outside the optical fibers and the copper stranded wires, the inner protective jacket layer is covered with an outer protective jacket layer, a molding sleeve is arranged on outer layers of the optical fibers, the molding sleeve is arranged outside the optical fibers in a sleeved mode, and certain gaps exist between the molding sleeve and outer diameters of the optical fibers. The method includes the steps of covering inner cores of the optical fibers with nylon layers to form optical fiber units, enabling at least one optical fiber unit to be lapped and stranded with an aramid fiber layer, then, extruding a PVC high-temperature resistance protective jacket, enabling the manufactured optical fibers to be sleeved with a stainless steel metal hose, then, enabling the manufactured optical fibers to be sleeved with the molding sleeve through a tube extruding structure, wherein six water blocking yarn bodies are vertically placed in inner hole walls of the molding sleeve in advance, and finally adopting double-handpiece extruding technology to sequentially extrude the high-temperature resistance PVC inner protective jacket layer and the nylon outer protective jacket layer,. The bending radius of the nylon photoelectric butterfly-shaped cable is smaller than 7.5mm, production efficiency is improved, and heat deformation resistance, flame retardance and water blocking performance are improved.
Description
Technical field
The present invention relates to cable and optical cable and merge field, specifically a kind of nylon photoelectricity butterfly cable and preparation method thereof.
Background technology
The integration of three networks is not the physics unification of simple telecommunications network, computer network and cable television network three macroreticulars, is the fusion of high-level business application its basic order.If consider the type of service that can meet at present: the Internet access, mediaphone, IPTV etc. need the support with high-end broadband network.In the definite integration of three networks major tasks of Executive Meeting of the State Council, " Fiber to the home to advance cities and towns, expands rural area broadband network coverage, actively pushes forward network overall planning and Joint construction and sharing " clearly proposed.Be accompanied by Chinese broadband implementation.FTTH will promote the rapid growth of Chinese broadband user's number.FTTH user to 2013 is 10 million year, 10-14 annual compound growth rate 60%.
Although Fiber to the home, obtained popularization energetically, the optical fiber rate of user side access electrical network is almost nil, and China's intelligent grid is at the early-stage in the fiberize of incoming end.Therefore,, for newly-built building, when laying drop cable, if can lay the cable that is applicable to high-speed communication simultaneously, that drops into the later stage of reducing widely user and operator.
For this reason, domestic had relevant research to corresponding cable, as a key name is called Chinese patent, the notification number CN201868144U of " a kind of composite flexible fireproof power cable with optical fibers ", it discloses several conductors, inorganic insulation layer, several conductors are arranged in parallel, every conductor outside is all enclosed with inorganic insulation layer, and the gap-fill between the inorganic insulation layer of several conductors has an Optical Fiber Transmission unit; Outside is enclosed with belting layer, inner restrictive coating, external sheath layer successively, gap between belting layer and the inorganic insulation layer of several conductors is provided with filler, belting layer is that Mica tape forms, and inner restrictive coating material adopts seamless wrinkle copper, and filler material is inorfil.This patent light harvesting fibre and power transmission and distribution cable, have been avoided secondary wiring, have reduced operating expenses, and networking expense is low; Huge bandwidth access is provided.Yet, due to factors such as its external diameter are thick, stripping is inconvenient, construction is inconvenient, therefore fail large-scale promotion, use.For another example a key name is called the Chinese patent of " a kind of power optical fiber is to family cable ", notification number CN102314968A, it discloses the first insulated conductor, the second insulated conductor, butterfly optical cable, envelope the first outer jacket of the first insulated conductor, envelope the second insulated conductor the second outer jacket, envelope the 3rd outer jacket of butterfly optical cable and be positioned at cavity within the 3rd outer jacket and that can hold described butterfly optical cable; The first insulated conductor, the second insulated conductor lay respectively at the both sides of butterfly optical cable; The first outer jacket, the second outer jacket, the 3rd outer jacket are one-body molded; In plane arbitrary and that the first conductor axis is perpendicular, the outer rim of the 3rd outer jacket is protruded to cavity.Although this invention has adopted the contour structures of butterfly optical cable, reached easily spread split, easily lay, the easy beneficial effect such as construction.But find through long-term research, the bending direction that often occurs oversheath and cable core due to butterfly optical cable is inconsistent, and optical fiber directly contacts with sheath, can not produce remaining length, cause butterfly optical cable when construction wiring, even if carry out bending within the scope of the bending radius of butterfly optical cable, also usually occur that butterfly optical cable unit damages, the phenomenon of fibercuts, to construction, cause much inconvenience and loss.
Summary of the invention
technical problem to be solved by this invention is to provide a kind of nylon photoelectricity butterfly cable and preparation method thereof, this nylon photoelectricity butterfly cable stripping and easy construction, and during construction wiring, optical fiber can stressedly not rupture.
A kind of nylon photoelectricity butterfly cable of the present invention, comprise optical fiber, a copper stranded conductor is arranged in optical fiber both sides respectively Parallel Symmetric, optical fiber and copper stranded conductor arrange integral type inner restrictive coating outward, inner restrictive coating is coated external sheath layer outward again, described fiber outer layer is provided with moulding sleeve pipe, and this molding sleeve pipe box has certain interval outside optical fiber and with optical fiber external diameter.
The moulding sleeve pipe of this kind of endoporus molding structure makes optical fiber directly not contact with protective cover material, and optical fiber can have appropriate endwisely slipping in moulding sleeve pipe, and moulding sleeve pipe not only efficiently solves optical fiber pressurized and causes impaired problem; The zero remaining long bad phenomenon of even bearing remaining length and cannot adjusting of simultaneously having avoided extrusion modling to cause.
As improvement, between optical fiber and moulding sleeve pipe, be also provided with flange-connection stainless steel metal flexible pipe, optical fiber is enclosed within flange-connection stainless steel metal flexible pipe.By adopting flange-connection stainless steel metal flexible pipe, not only reduced the impact of lateral pressure on optical fiber, also improved the bending property of optical fiber, can realize the bending radius of butterfly optical cable 7.5mm.
Further, described optical fiber structure is: outside optical fiber inner core, hard-pressed bale nylon layer forms fiber unit, and several this fiber units are arranged in parallel, outside wrapped aramid layers, and aramid layers extrudes the high temperature resistant sheath of PVC outward again.
Further, moulding sleeve pipe adopts and squeezes tubular structure moulding, and on molding sleeve pipe orifice wall, directly puts 6 water blocking yarns, has improved the block-water performance of product, has avoided nylon material water suction too much to cause deformation of products.
Inner restrictive coating adopts high temperature resistant PVC sheath, and external sheath layer adopts nano-nylon material.Conventional butterfly optical cable is in order to possess the characteristic of environmental protection flame retardant, the general low smoke and zero halogen protective cover material that adopts, but this kind of material wear-resistant performance is not good, in order effectively to solve the flimsy phenomenon of butterfly optical cable surface sheath, the present invention has adopted nano-nylon material to be coated on the duplex sheath structure on high temperature resistant PVC protective cover material surface.Meanwhile, according to the characteristic of product requirement, adopted nano-nylon material, more common this product of nylon has feature: 1, heat-resistant deforming temperature rises to 150 ℃ from 65 ℃, increases on year-on-year basis 90%; 2, thermal coefficient of expansion declines 45%; 3, fire resistance promotes, and HRR declines 63%, and harmful black smoke disappears; 4, barrier properties for gases improves 50%-4 times.
In addition, the present invention also provides the manufacture method of this nylon photoelectricity butterfly cable, it is characterized in that comprising the following steps:
1) 1 optical fiber inner core is installed on fiber placing shaft, by fine tension adjustment to the 0.6 ~ 0.7N of putting of optical fiber inner core, takeup tension is adjusted to 5 ~ 7N;
2) make above-mentioned optical fiber inner core pass successively device for filling oil, vacuum extractor and import in hard-pressed bale mould, the pressure of device for filling oil is 0.02MPa, and import mould is: 0.75, and outlet mold is: 0.6; The pressure of vacuum extractor is 0.4MPa;
Afterwards the optical fiber inner core after oil-filled is passed through to the extrusion molding mould of plastic extruding machine, at optical fiber inner core outer cladding last layer nylon layer, it is 215 ~ 265 ℃ that nylon layer extrudes temperature; Cooling through hot water storgae, cold rinse bank secondary again, hot water storgae temperature is at 50 ~ 60 ℃, and cold rinse bank temperature, at 20 ~ 25 ℃, is made the fiber unit of hard-pressed bale, and it is of a size of Φ 0.58-0.62mm, and speed of production is 250m/min;
3) at least one fiber unit is placed in to pay off rack, laying tension is 2 ~ 2.5N, adopts wrapped stranded aramid layers: wrapped stranded with the aramid yarn of 8 1580dtex, aramid fiber laying tension is 1N; Adopt afterwards the high temperature resistant sheath of PVC to adopt PVC protective cover material to squeeze tubular type and extrude the high temperature resistant sheath of PVC, PVC protective cover material temperature is 145 ~ 185 ℃, and sheath wall thickness is 0.45-0.55mm;
4) optical fiber of step 3) being made is inserted in flange-connection stainless steel metal flexible pipe, then adopt to squeeze tubular structure molding mode and be inserted in moulding sleeve pipe, forms and in molded cannula, directly puts in advance on inner hole wall 6 water blocking yarns;
5) by step 4) optical fiber and two copper stranded conductors made are placed on pay off rack, adopt Double-head extrusion process, extrude successively high temperature resistant PVC inner restrictive coating and nylon outer sheath layer, wherein the thickness of high temperature resistant PVC inner restrictive coating is 0.7-0.75mm, and extruding temperature is 145 ~ 185 ℃; The thickness of nylon outer sheath layer is 0.4-0.45mm, and extruding temperature is 215 ~ 265 ℃; Cooling through hot water storgae, cold rinse bank secondary afterwards, hot water storgae temperature is at 50 ~ 60 ℃, and cold rinse bank temperature is at 20 ~ 25 ℃, one-shot forming.
The relative prior art of the present invention has following beneficial effect:
1, this butterfly optical cable is when construction wiring, and bending radius still can not fracture when being less than 7.5mm.
2, adopt high temperature resistant PVC protective cover material, guarantee that the jacket thickness between copper stranded conductor and moulding sleeve pipe, copper stranded conductor and nylon outer sheath is 0.7-0.75mm.Adopt this kind of material and wall thickness can replace the structure (layer insulating is coated on 8 copper stranded conductors, and second layer insulating barrier is outer jacket) of original dielectric layers, reduced the operation that insulate together, greatly improved production efficiency.
3, inner restrictive coating adopts high temperature resistant PVC sheath, and external sheath layer adopts nano-nylon material, heat-resistant deforming ability and fire resistance is promoted greatly and promote; Barrier properties for gases also obtains raising.
4, improve the block-water performance of product, avoided nylon material water suction too much to cause deformation of products.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's (single core);
Fig. 2 is the structural representation of the present invention's (two cores);
Fig. 3 is the structural representation of the present invention's (four-core).
Embodiment
As shown in Figure 1, a kind of nylon photoelectricity butterfly cable of the present invention, comprise optical fiber, a copper stranded conductor 8 is arranged in optical fiber both sides respectively Parallel Symmetric, the outer integral type inner restrictive coating 9 that arranges of optical fiber and copper stranded conductor 8, and inner restrictive coating is coated external sheath layer 10 outward again, in described optical fiber is enclosed within, the outer cover again of flange-connection stainless steel metal flexible pipe 5 has moulding sleeve pipe 6, and moulding sleeve pipe 6 adopts and squeezes tubular structure moulding, and on moulding sleeve pipe 6 inner hole walls, directly puts 6 water blocking yarns 7.Inner restrictive coating 9 adopts high temperature resistant PVC sheath, and external sheath layer 10 adopts 10 nano-nylon materials.
Wherein optical fiber structure is: at the outer hard-pressed bale nylon layer of optical fiber inner core 12, form fiber units, one, two or four this fiber units are arranged in parallel, outside wrapped aramid layers 3, the outer high temperature resistant sheath 4 of PVC that extrudes again of aramid layers 3.See Fig. 1 to Fig. 3.
The manufacture method of described nylon photoelectricity butterfly cable, it comprises the following steps:
1) 1 optical fiber inner core 1 is installed on fiber placing shaft, by fine tension adjustment to the 0.6 ~ 0.7N of putting of optical fiber inner core 1, takeup tension is adjusted to 5 ~ 7N;
2) make above-mentioned optical fiber inner core pass successively device for filling oil, vacuum extractor and import in hard-pressed bale mould, the pressure of device for filling oil is 0.02MPa, and import mould is: 0.75, and outlet mold is: 0.6; The pressure of vacuum extractor is 0.4MPa;
Afterwards the optical fiber inner core after oil-filled is passed through to the extrusion molding mould of plastic extruding machine, at optical fiber inner core 1 outer cladding last layer nylon layer 2, it is 215 ~ 265 ℃ that nylon layer 2 extrudes temperature; Cooling through hot water storgae, cold rinse bank secondary again, hot water storgae temperature is at 50 ~ 60 ℃, and cold rinse bank temperature, at 20 ~ 25 ℃, is made the fiber unit of hard-pressed bale, and it is of a size of Φ 0.58-0.62mm, and speed of production is 250m/min; Hard-pressed bale external diameter external diameter urine is in reducing structure.
3) according to demand one, two or four fiber units are placed in to pay off rack, laying tension is 2 ~ 2.5N, adopt wrapped stranded aramid layers 3: wrapped stranded with the aramid yarn of 8 1580dtex, aramid fiber laying tension is 1N, make more than the long-term tensile force of product can reach 300N; Adopt afterwards the high temperature resistant sheath of PVC to adopt PVC protective cover material to squeeze tubular type and extrude the high temperature resistant sheath 4 of PVC, PVC protective cover material temperature is 145 ~ 185 ℃, and sheath wall thickness is 0.45-0.55mm;
4) optical fiber of step 3 being made is inserted in flange-connection stainless steel metal flexible pipe 5, then adopt to squeeze tubular structure molding mode and be inserted in moulding sleeve pipe 6, forms and in molded cannula 6, directly puts in advance on inner hole wall 6 water blocking yarns 7; Adopt flange-connection stainless steel metal flexible pipe, discharge the G.657A2 bending property of optical fiber, bending radius can realize and be less than 7.5mm.
In this step, adopt flange-connection stainless steel metal flexible pipe 5 to be placed on PVC sheath 4 surfaces, this kind of cable adopts G.657A2 optical fiber, this type optical fiber is to bend-insensitive, macrobending loss 0.2dB@1550nm under 7.5mm bending radius reaches, do not affect Optical Fiber Transmission performance, be particularly suitable for crossing the corner bending use of registering one's residence.But because the bending direction of oversheath and cable core is inconsistent, and the impact of lateral pressure, cause use that general standard requires G.657A2 the butterfly optical cable bending radius of optical fiber be 15mm.By adopting flange-connection stainless steel metal flexible pipe not only to reduce the impact of lateral pressure on optical fiber, also improved bending property, can realize the bending radius of butterfly optical cable 7.5mm.
5) by step 4) optical fiber and two copper stranded conductors 8 made are placed on pay off rack, adopt Double-head extrusion process, extrude successively high temperature resistant PVC inner restrictive coating 9 and nylon outer sheath layer 10, wherein the thickness of high temperature resistant PVC inner restrictive coating 9 is 0.7-0.75mm, and extruding temperature is 145 ~ 185 ℃; The thickness of nylon outer sheath layer 10 is 0.4-0.45mm, and extruding temperature is 215 ~ 265 ℃; Cooling through hot water storgae, cold rinse bank secondary afterwards, hot water storgae temperature is at 50 ~ 60 ℃, and cold rinse bank temperature is at 20 ~ 25 ℃, one-shot forming.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (7)
1. a nylon photoelectricity butterfly cable, comprise optical fiber, a copper stranded conductor (8) is arranged in optical fiber both sides respectively Parallel Symmetric, the outer integral type inner restrictive coating (9) that arranges of optical fiber and copper stranded conductor (8), inner restrictive coating is coated external sheath layer (10) outward again, it is characterized in that, described fiber outer layer is provided with moulding sleeve pipe (6), and this moulding sleeve pipe (6) is enclosed within outside optical fiber and has certain interval with optical fiber external diameter.
2. nylon photoelectricity butterfly cable according to claim 1, is characterized in that, between optical fiber and moulding sleeve pipe (6), is also provided with flange-connection stainless steel metal flexible pipe (5), and optical fiber is enclosed within flange-connection stainless steel metal flexible pipe (5).
3. nylon photoelectricity butterfly cable according to claim 1 and 2, it is characterized in that, described optical fiber structure is: outside optical fiber inner core (1), hard-pressed bale nylon layer (2) forms fiber unit, several this fiber units are arranged in parallel, outside wrapped aramid layers (3), the outer high temperature resistant sheath of PVC (4) that extrudes again of aramid layers (3).
4. nylon photoelectricity butterfly cable according to claim 1 and 2, is characterized in that, moulding sleeve pipe (6) adopts and squeezes tubular structure moulding, and directly puts 6 water blocking yarns (7) on moulding sleeve pipe (6) inner hole wall.
5. nylon photoelectricity butterfly cable according to claim 1 and 2, is characterized in that, inner restrictive coating (9) adopts high temperature resistant PVC sheath.
6. nylon photoelectricity butterfly cable according to claim 1 and 2, is characterized in that, external sheath layer (10) adopts 10 nano-nylon materials.
7. the manufacture method of nylon photoelectricity butterfly cable described in claim 1 to 7 any one, is characterized in that comprising the following steps:
1) 1 optical fiber inner core (1) is installed on fiber placing shaft, by fine tension adjustment to the 0.6 ~ 0.7N of putting of optical fiber inner core (1), takeup tension is adjusted to 5 ~ 7N;
2) make above-mentioned optical fiber inner core pass successively device for filling oil, vacuum extractor and import in hard-pressed bale mould, the pressure of device for filling oil is 0.02MPa, and import mould is: 0.75, and outlet mold is: 0.6; The pressure of vacuum extractor is 0.4MPa;
Afterwards the optical fiber inner core after oil-filled is passed through to the extrusion molding mould of plastic extruding machine, at optical fiber inner core (1) outer cladding last layer nylon layer (2), it is 215 ~ 265 ℃ that nylon layer (2) extrudes temperature; Cooling through hot water storgae, cold rinse bank secondary again, hot water storgae temperature is at 50 ~ 60 ℃, and cold rinse bank temperature, at 20 ~ 25 ℃, is made the fiber unit of hard-pressed bale, and it is of a size of Φ 0.58-0.62mm, and speed of production is 250m/min;
3) at least one fiber unit is placed in to pay off rack, laying tension is 2 ~ 2.5N, adopts wrapped stranded aramid layers (3): wrapped stranded with the aramid yarn of 8 1580dtex, aramid fiber laying tension is 1N; Adopt afterwards the high temperature resistant sheath of PVC to adopt PVC protective cover material to squeeze tubular type and extrude the high temperature resistant sheath of PVC (4), PVC protective cover material temperature is 145 ~ 185 ℃, and sheath wall thickness is 0.45-0.55mm;
4) optical fiber of step 3) being made is inserted in flange-connection stainless steel metal flexible pipe (5), then adopt to squeeze tubular structure molding mode and be inserted in moulding sleeve pipe (6), forms and in molded cannula (6), directly puts in advance on inner hole wall 6 water blocking yarns (7);
5) by step 4) optical fiber and two copper stranded conductors (8) made are placed on pay off rack, adopt Double-head extrusion process, extrude successively high temperature resistant PVC inner restrictive coating (9) and nylon outer sheath layer (10), wherein the thickness of high temperature resistant PVC inner restrictive coating (9) is 0.7-0.75mm, and extruding temperature is 145 ~ 185 ℃; The thickness of nylon outer sheath layer (10) is 0.4-0.45mm, and extruding temperature is 215 ~ 265 ℃; Cooling through hot water storgae, cold rinse bank secondary afterwards, hot water storgae temperature is at 50 ~ 60 ℃, and cold rinse bank temperature is at 20 ~ 25 ℃, one-shot forming.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103996452A (en) * | 2014-05-07 | 2014-08-20 | 浙江一舟电子科技股份有限公司 | Lift cable |
| CN107230509A (en) * | 2017-07-07 | 2017-10-03 | 山东太平洋光纤光缆有限公司 | A kind of fire-fighting special photoelectric composite rope and preparation method thereof |
| CN107329222A (en) * | 2017-08-09 | 2017-11-07 | 长飞光纤光缆股份有限公司 | A kind of anti-insect bite covered wire cable of self-bearing type |
| CN108022690A (en) * | 2017-12-06 | 2018-05-11 | 山东太平洋光纤光缆有限公司 | A kind of pipe band laying optoelectronic composite cable and manufacture method |
| CN108039243A (en) * | 2017-12-06 | 2018-05-15 | 山东太平洋光纤光缆有限公司 | A kind of resistance to dragging optoelectronic composite cable and manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108039243A (en) * | 2017-12-06 | 2018-05-15 | 山东太平洋光纤光缆有限公司 | A kind of resistance to dragging optoelectronic composite cable and manufacture method |
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| CN103714909B (en) | 2016-01-20 |
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