CN105810338A - Composite waterproof cable and preparation method thereof - Google Patents
Composite waterproof cable and preparation method thereof Download PDFInfo
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- CN105810338A CN105810338A CN201410855652.3A CN201410855652A CN105810338A CN 105810338 A CN105810338 A CN 105810338A CN 201410855652 A CN201410855652 A CN 201410855652A CN 105810338 A CN105810338 A CN 105810338A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses a composite waterproof cable and a preparation method thereof. The composite waterproof cable comprises a cable inner core, an isolation layer and a sheath layer, wherein the isolation layer and the sheath layer successively cover the cable inner core from the inside out. The cable inner core is formed by twisting a number of insulation core wires. Water blocking filling layers are arranged in twisting voids of a number of insulation core wires. Each insulation core wires comprises a conductor group and an insulation layer which covers the conductor group. Each conductor group is formed by tow-twisting a number of copper wires and a number of water blocking wires, wherein the filament diameter of each water blocking wire before water swelling is less than or equal to the filament diameter of each copper wire, and the filament diameter of each copper wire is less than 0.2mm. According to the invention, water blocking ropes are arranged in twisting voids of a number of insulation core wires; the water blocking ropes can block radial seepage of the cable and can absorb vertical seepage of the cable; and radial and longitudinal full range stereo waterproof effect of the cable is realized.
Description
Technical field
The present invention relates to power cable technical field, more particularly, it relates to a kind of combination water-proof cable and preparation method thereof.
Background technology
Needs along with social development, the use occasion of plant equipment product is more and more extensive, relate to open air (drenching with rain), the Special use occasion such as under water, to the performance requirement of plant equipment product own harsh while, the waterproof requirement as the matching used electric wire of auxiliary is also improved accordingly.
Domestic at present radially waterproof and longitudinal waterproof two ways are generally adopted for multicore waterproof flexible cord, namely adopt and internal fill waterproof material and outer used waterproof material.There is the problem that water, steam easily penetrate into conductor by conductor gap in aforesaid way.
Summary of the invention
The technical problem to be solved in the present invention is in that, for drawbacks described above of the prior art, it is provided that a kind of combination water-proof cable and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is:
One combination water-proof cable is provided, including cable inner core, and is coated on the sealing coat outside described cable inner core and restrictive coating from inside to outside successively；Described cable inner core is formed by many insulation core wires are stranded, is provided with the packed layer for blocking water in the stranded space of described many insulation core wires；Described insulation core wire includes conductor group and is coated on the insulating barrier outside described conductor group, described conductor group by many copper wires and many block water tow strand form, filament diameter before a described imbibition that blocks water is less than or equal to the filament diameter of described copper wire, and the filament diameter of described copper wire is less than 0.2mm.
In combination water-proof cable of the present invention, the filament diameter of described copper wire is less than 0.18mm, and the monofilament percentage elongation of described copper wire is more than 20%.
In combination water-proof cable of the present invention, described in block water the expansion rate of silk more than or equal to 8mm/min, described in block water the diameter after an imbibition more than or equal to 12mm.
In combination water-proof cable of the present invention, the thickness of described insulating barrier is 0.2mm～0.8mm.
In combination water-proof cable of the present invention, described packed layer is waterproofing rope.
In combination water-proof cable of the present invention, described sealing coat is formed by aluminium-plastic tape is wrapped, and the thickness of described sealing coat is more than or equal to 0.05mm.
In combination water-proof cable of the present invention, described restrictive coating is made up of halogen-free and low-smoke flame-retardant polyolefin composite, and the thickness of described restrictive coating is 1mm～1.5mm.
In combination water-proof cable of the present invention, described halogen-free and low-smoke flame-retardant polyolefin composite includes by mass fraction: EVA40～60 part, Mg (OH)2Or AL (OH)3160～190 parts, LDPE30～50 part, compatilizer 5～20 parts, synergist 2～4 parts and stabilizer 0.5～1 part.
The present invention also provides for a kind of combination water-proof cable, including cable inner core, and is coated on the sealing coat outside described cable inner core and restrictive coating from inside to outside successively；Described cable inner core is formed by many insulation core wires are stranded, is provided with the packed layer for blocking water in the stranded space of described many insulation core wires；
Described insulation core wire includes conductor group and is coated on the insulating barrier outside described conductor group, described conductor group includes the first conductor layer being positioned at described conductor group switching centre, the second conductor layer being coated on outside described first conductor layer, and it is embedded the silk that blocks water between described first conductor layer and described second conductor layer, described first conductor layer is formed by many copper wires are stranded, and described second conductor layer is arranged to make up and is looped around by many copper wires are rounded outside described first conductor layer；Filament diameter before a described imbibition that blocks water is less than or equal to the filament diameter of described copper wire, and the filament diameter of described copper wire is less than 0.2mm.
The present invention also provides for a kind of preparation method combining water-proof cable, comprises the following steps:
S1, prepare conductor group: after copper wire and the skein silk that blocks water being closed, obtain conductor group；
S2, extruded insulation layer: adopt plsitive mold at the outer extruded insulation layer of described conductor group to obtain insulation core wire；
S3, wrapped sealing coat: by stranded for many described insulation core wires, and in the stranded gap of described many insulation core wires, fill waterproofing rope, to obtain cable inner core, being evenly coated at by sealing coat outside described cable inner core, described sealing coat is formed by aluminium-plastic tape is wrapped；
S4, extrude restrictive coating: adopt the mode of extruding to be evenly coated at outside described sealing coat by the restrictive coating prepared by halogen-free and low-smoke flame-retardant polyolefin composite.
In sum, implement combination water-proof cable of the present invention and preparation method thereof, have the advantages that first, conductor group is formed by many copper wires and the many tow strand that blocks water, and copper wire is soft annealing copper free wire, owing to annealing copper free wire is oxygen-free also fine copper without any deoxidizer residue, therefore its electricapparatus performance is extremely excellent, and the monofilament percentage elongation of copper free wire is more than 20%, monofilament percentage elongation height illustrates that copper wire is soft, ductility strong, and bend resistance ability is strong.Secondly as block water, the water absorption of silk is strong, can expand more than 40 times of own vol after water suction, therefore adds the silk that blocks water in conductor group, it is possible to effectively intercept the longitudinal direction infiltration of cable, it is prevented that copper wire group is oxidized, and the electric property to guarantee copper wire is unaffected.3rd, the stranded space of many insulation core wires is arranged to the waterproofing rope blocked water, the water absorption of this waterproofing rope is strong, more than 40 times of own vol can be expanded after water suction, and this waterproofing rope can intercept the radial direction infiltration of cable, also can absorbing cable longitudinal direction infiltration, reach the effect of cable radially and longitudinally omnibearing stereo waterproof.Finally, restrictive coating uses halogen-free and low-smoke flame-retardant polyolefin composite, can not only meet outside general fire resistance, also have certain water resistance, can effectively prevent moisture content from radially penetrating into inside cable, thus extending the service life of water-proof cable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the combination water-proof cable that one of present pre-ferred embodiments provides；
Fig. 2 is the structural representation of the conductor group of combination water-proof cable shown in Fig. 1.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
As it is shown in figure 1, the combination water-proof cable that present pre-ferred embodiments provides, this water-proof cable includes cable inner core 3, and is coated on the sealing coat 2 outside cable inner core 3 and restrictive coating 1 from inside to outside successively.Wherein, cable inner core 3 is formed by many insulation core wires 5 are stranded, the stranded space of many insulation core wires 5 is provided with the packed layer 4 for blocking water, insulation core wire 5 includes conductor group 7 and the insulating barrier 6 being coated on outside conductor group 7, shown in Fig. 2, conductor group 7 is restrainted strand formed by many copper wires 8 and the many silk 9 that blocks water, and the filament diameter before silk 9 imbibition that blocks water is less than or equal to the filament diameter of copper wire 8, and the filament diameter of copper wire 8 is less than 0.2mm.
As in figure 2 it is shown, conductor group 7 is restrainted strand formed by many copper wires 8 and the many silk 9 that blocks water.Wherein, copper wire 8 is soft annealing copper free wire, owing to annealing copper free wire is oxygen-free also fine copper without any deoxidizer residue, therefore its electricapparatus performance is extremely excellent, and the monofilament percentage elongation of copper free wire is more than 20%, monofilament percentage elongation height illustrates that copper wire is soft, ductility strong, and bend resistance ability is strong.
Being different from blister copper silk of the prior art, the filament diameter of copper wire 8 used herein is respectively less than 0.2mm, it is preferable that the filament diameter of copper wire 8 is less than 0.18mm, and in the present embodiment, the filament diameter of copper wire 8 is 0.16mm.Owing in the present invention, the filament diameter of copper wire 8 is little, and the filament diameter before silk 9 imbibition that blocks water is not more than the filament diameter of copper wire 8, needed for making to make the conductor group 7 of same external diameter the quantity of copper wire 8 much larger than in prior art the quantity of the required blister copper silk used, so can external force suffered by effective dispersed cable.Therefore, the electric conductivity of conductor group 7 of the present invention is strong, is not easy fracture without Hydrogen Brittleness Phenomena, has extremely strong bend resistance ability, will not rupture, and then guarantee that the physically and electrically performance of cable is unaffected after coming and going bending motion for million times through exceedance.
Further, in the present embodiment, the filament diameter before silk 9 imbibition that blocks water is not more than the filament diameter of copper wire 8, preferably, block water the filament diameter before silk 9 imbibition less than 0.16mm, and the expansion rate after the silk 9 that blocks water water suction is not less than 8mm/min, and the diameter after silk 9 imbibition that blocks water is more than 12mm, in the present embodiment, the filament diameter before silk 9 imbibition that blocks water is 0.15mm.Owing to silk 9 water absorption that blocks water is strong, more than 40 times of own vol after water suction, can be expanded, therefore by adding the silk 9 that blocks water in conductor group 7, it is possible to prevent cable longitudinally infiltration, thus effectively preventing conductor group 7 from aoxidizing.
In addition, the mode bundle that the silk 9 that above-mentioned many copper wires 8 and many blocked water adopts armour stranded is stranding into conductor group 7, there is stronger intensity and bending ability in order to ensure prepared conductor group 7, time stranded, the bundle of copper wire 8 twists 10 times of the twisting pitch stranded external diameter less than or equal to copper wire 8, and the bundle stranded mode of strand of many copper wires 8 is left-hand.
As shown in Figure 1, at the outer uniformly coated insulation layer 6 of above-mentioned conductor group 7 to obtain insulation core wire 5, concrete, the present embodiment adopts plsitive mold at conductor group 7 outer cladding insulating barrier 6, thus obtaining the insulation core wire 5 of composition water-proof cable, this insulating barrier 6 is made up of pvc material, to meet the pressure by force and strong anti-wear performance of cable.The insulating barrier 6 prepared by pvc material greatly improves the ageing resistance of cable; and improve the hot strength of cable; enhance the overall flexibility of cable; insulating barrier 6 is made can better to protect copper wire 8 and the silk 9 that blocks water; avoid destroying because insulating barrier 6 weares and teares the insulating properties of cable, cause potential safety hazard.Preferably, the thickness of the application insulating barrier 6 is 0.2mm～0.8mm, and in the present embodiment, the thickness of insulating barrier 6 is 0.5mm.
As it is shown in figure 1, many insulation core wires 5 adopt the twisting mode of armour formula carry out stranded obtaining cable inner core 3.Wherein, stranded direction is inwardly followed successively by " S "-" Z "-" S " etc. to 15 times of stranded external diameter less than or equal to cable inner core 3 of, the twisting pitch of cable inner core 3 by outer layer.
Preferably, it is possible in the stranded space of many insulation core wires 5, be arranged to the packed layer 4 blocked water, to strengthen the waterproof effect of cable.In the present embodiment, packed layer 4 is waterproofing rope, owing to the water absorption of waterproofing rope is strong, can expand more than 40 times of own vol after water suction, therefore by adding waterproofing rope between insulation core wire 5, it is possible to prevent cable longitudinally infiltration, thus effectively preventing copper wire 8 oxidized.
Further, by adding waterproofing rope in stranded space, accommodation can also be carried out according to the requirement that water-proof cable is different, cable inner core 3 is made to constitute rounded configurations, thus the overall structure maintaining water-proof cable is constant, this adaptive adjustment is simple and enhances adaptive capacity and the scope of application of water-proof cable greatly.
In the present embodiment, the quantity of insulation core wire 5 is four, is added with waterproofing rope, and makes cable inner core 3 constitute rounded configurations in the stranded space of four insulation core wires 5.It is understood that the present embodiment does not limit the particular number of insulation core wire 5, it can be multiple.Preferably, the quantity of insulation core wire 5 is four or seven.
As it is shown in figure 1, the outer peripheral face of cable inner core 3 is coated with sealing coat 2, this sealing coat 2 is formed by aluminium-plastic tape is wrapped.In the present embodiment, aluminium-plastic tape is around the outer layer wrapping in cable inner core 3, and the aluminium strip layer of aluminium-plastic tape is close to cable inner core 3.Preferably, the thickness of aluminium-plastic tape is not less than 0.05mm, aluminium-plastic tape the thickness of aluminium strip layer be not less than 0.02mm.
By at the outer wrapped aluminium-plastic tape of cable inner core 3, being possible not only to strengthen the hot strength of cable, strengthen overall flexibility and the wearability of cable, and may also operate as the effect of fixing cable inner core 3, it is ensured that the mechanical performance of cable and stablizing of electrical property.
As it is shown in figure 1, the outer peripheral face of sealing coat 2 is coated with restrictive coating 1, owing to sealing coat 2 is formed by aluminium-plastic tape is wrapped, restrictive coating 1 adopts the mode of extruding to be coated on sealing coat 2, it is possible to the thickness making sealing coat 2 is uniform.In the present embodiment, restrictive coating 1 is made up of halogen-free and low-smoke flame-retardant polyolefin composite, to meet anti-flammability and the water proofing property of cable.Wherein, halogen-free and low-smoke flame-retardant polyolefin composite is made up of the raw material of following parts by weight: EVA40～60 part, Mg (OH)2Or AL (OH)3160～190 parts, LDPE30～50 part, compatilizer 5～20 parts, synergist 2～4 parts and stabilizer 0.5～1 part.
Being different from traditional fire proofing, this halogen-free and low-smoke flame-retardant polyolefin composite is possible not only to meet outside the general fire resistance of cable, also has certain water resistance, can effectively prevent water from radially penetrating into inside cable.In addition; this halogen-free and low-smoke flame-retardant polyolefin composite greatly improves the ageing resistance of cable; and improve hot strength; enhance the overall flexibility of cable; restrictive coating 1 is made can better to protect copper wire 8; avoid destroying the insulating properties of cable because restrictive coating 1 weares and teares, thus causing potential safety hazard.
In the present embodiment; the thickness of restrictive coating 1 is 1mm～1.5mm; the restrictive coating 1 made due to halogen-free and low-smoke flame-retardant polyolefin composite has stronger pliability and wearability; the thickness making traditional polyvinyl chloride insulation layer need to reach more than a times of herein described restrictive coating 1 thickness, just can have the protected effect identical with the application restrictive coating 1.Preferably, the thickness of restrictive coating 1 is 1.2mm.
The application also provides for a kind of combination water-proof cable, this cable includes cable inner core 3, and it is coated on the sealing coat 2 outside cable inner core 3 and restrictive coating 1 from inside to outside successively, cable inner core 3 is formed by many insulation core wires 5 are stranded, being provided with the packed layer 4 for blocking water in the stranded space of many insulation core wires 5, this packed layer 4 is waterproofing rope.
Concrete, insulation core wire 5 includes conductor group 7 and the insulating barrier 6 being coated on outside conductor group 7, shown in Fig. 2, conductor group 7 includes the first conductor layer 7a being positioned at conductor group 7 center, the second conductor layer 7b being coated on outside the first conductor layer 7a, and it is embedded the silk 9 that blocks water between the first conductor layer 7a and the second conductor layer 7b, first conductor layer 7a is formed by many copper wires 8 are stranded, and the second conductor layer 7b is arranged to make up and is looped around by many copper wires 8 are rounded outside first conductor layer 7a.
Further, the filament diameter before silk 9 imbibition that blocks water is less than or equal to the filament diameter of copper wire 8, and the filament diameter of copper wire 8 is less than 0.2mm.
Preferably, in the present embodiment, the first conductor layer 7a is made up of seven copper wires 9, and the copper wire 9 to ensure the first conductor layer 7a can be constituted rounded configurations arrangement.It is understood that the present embodiment does not limit the particular number of copper wire 9 in the first conductor layer 7a, the quantity of copper wire 9 can be adjusted as required, arranges as long as enabling the first conductor layer 7a to constitute rounded configurations.
The application also provides for a kind of preparation method combining water-proof cable, owing to the process control condition in combination water-proof cable preparation process is prior art, does not repeat them here.Wherein, described preparation method comprises the following steps:
S1, prepare conductor group: after stranded to copper wire 8 and the silk 9 that blocks water, obtain conductor group 7.
Concrete, the preparation of copper wire 8 includes three sub-steps: select materials, wire drawing and stranded.Select materials: select the conductor material used according to the requirement of the different cable of preparation, as selected electrician's round copper rod as conductor material；Wire drawing: conductor material carries out wire drawing, annealing obtains annealing copper free wire, and the diameter of this annealing copper free wire is 0.15mm；Stranded: annealing copper free wire wire drawing obtained and the silk 9 that blocks water adopt the stranded mode bundle of armour to be stranding into conductor group 7.
S2, extruded insulation layer: adopting plsitive mold at the outer extruded insulation layer 6 of conductor group 7 to obtain insulation core wire 5, this insulating barrier 6 is polyvinyl chloride insulation material.
S3, wrapped sealing coat: by stranded for many insulation core wires 5, and in the stranded gap of many insulation core wires 5, fill waterproofing rope, to obtain cable inner core 3, sealing coat 2 is evenly coated at outside cable inner core 3, sealing coat 2 is formed by aluminium-plastic tape is wrapped.
S4, extrude restrictive coating: adopt the mode of extruding to be evenly coated at outside sealing coat 2 by the restrictive coating 1 prepared by halogen-free and low-smoke flame-retardant polyolefin composite.Concrete, configuration includes the raw material of this halogen-free and low-smoke flame-retardant polyolefin composite.
Embodiment 1
S1, prepare conductor group: after stranded to copper wire 8 and the silk 9 that blocks water, obtain conductor group 7.
S2, extruded insulation layer: adopting plsitive mold at the outer extruded insulation layer 6 of conductor group 7 to obtain insulation core wire 5, this insulating barrier 6 is polyvinyl chloride insulation material.
S3, wrapped sealing coat: by stranded for many insulation core wires 5, and in the stranded gap of many insulation core wires 5, fill waterproofing rope, to obtain cable inner core 3, sealing coat 2 is evenly coated at outside cable inner core 3, sealing coat 2 is formed by aluminium-plastic tape is wrapped.
S4, extrude restrictive coating: adopt the mode of extruding to be evenly coated at outside sealing coat 2 by the restrictive coating 1 prepared by halogen-free and low-smoke flame-retardant polyolefin composite.
Wherein, EVA40 part, Mg (OH)2160 parts, LDPE50 part, compatilizer 15 parts, synergist 2 parts and stabilizer 1 part.
Embodiment 2
S1, prepare conductor group: after stranded to copper wire 8 and the silk 9 that blocks water, obtain conductor group 7.
S2, extruded insulation layer: adopting plsitive mold at the outer extruded insulation layer 6 of conductor group 7 to obtain insulation core wire 5, this insulating barrier 6 is polyvinyl chloride insulation material.
S3, wrapped sealing coat: by stranded for many insulation core wires 5, and in the stranded gap of many insulation core wires 5, fill waterproofing rope, to obtain cable inner core 3, sealing coat 2 is evenly coated at outside cable inner core 3, sealing coat 2 is formed by aluminium-plastic tape is wrapped.
S4, extrude restrictive coating: adopt the mode of extruding to be evenly coated at outside sealing coat 2 by the restrictive coating 1 prepared by halogen-free and low-smoke flame-retardant polyolefin composite.
Wherein, EVA40 part, Mg (OH)2190 parts, LDPE30 part, compatilizer 5 parts, synergist 2 parts and stabilizer 0.5 part.
Embodiment 2
S1, prepare conductor group: after stranded to copper wire 8 and the silk 9 that blocks water, obtain conductor group 7.
S2, extruded insulation layer: adopting plsitive mold at the outer extruded insulation layer 6 of conductor group 7 to obtain insulation core wire 5, this insulating barrier 6 is polyvinyl chloride insulation material.
S3, wrapped sealing coat: by stranded for many insulation core wires 5, and in the stranded gap of many insulation core wires 5, fill waterproofing rope, to obtain cable inner core 3, sealing coat 2 is evenly coated at outside cable inner core 3, sealing coat 2 is formed by aluminium-plastic tape is wrapped.
S4, extrude restrictive coating: adopt the mode of extruding to be evenly coated at outside sealing coat 2 by the restrictive coating 1 prepared by halogen-free and low-smoke flame-retardant polyolefin composite.
Wherein, EVA50 part, Mg (OH)2170 parts, LDPE40 part, compatilizer 15 parts, synergist 2 parts and stabilizer 1 part.
In sum, implement combination water-proof cable of the present invention and preparation method thereof, have the advantages that
(1) conductor group by many copper wires and many block water tow strand form, copper wire is soft annealing copper free wire, owing to annealing copper free wire is oxygen-free also fine copper without any deoxidizer residue, therefore its electricapparatus performance is extremely excellent, and the monofilament percentage elongation of copper free wire is more than 20%, monofilament percentage elongation height illustrates that copper wire is soft, ductility strong, and bend resistance ability is strong.
(2) owing to the water absorption of the silk that blocks water is strong, more than 40 times of own vol can be expanded after water suction, in conductor group, therefore add the silk that blocks water, it is possible to effectively intercept the longitudinal direction infiltration of cable, preventing copper wire group oxidized, the electric property to guarantee copper wire is unaffected.
(3) the stranded space of many insulation core wires is arranged to the waterproofing rope blocked water, the water absorption of this waterproofing rope is strong, more than 40 times of own vol can be expanded after water suction, and this waterproofing rope can intercept the radial direction infiltration of cable, also can absorbing cable longitudinal direction infiltration, reach the effect of cable radially and longitudinally omnibearing stereo waterproof.
(4) restrictive coating uses halogen-free and low-smoke flame-retardant polyolefin composite, can not only meet outside general fire resistance, also have certain water resistance, can effectively prevent moisture content from radially penetrating into inside cable, thus extending the service life of water-proof cable.
Although the present invention is illustrated by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, it is also possible to the present invention is carried out various conversion and equivalent replacement.It addition, for particular condition or material, it is possible to the present invention is made various amendment, without deviating from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should include the whole embodiments falling within the scope of the claims in the present invention.
Claims (10)
1. a combination water-proof cable, it is characterised in that include cable inner core (3), and it is coated on the outer sealing coat (2) of described cable inner core (3) and restrictive coating (1) from inside to outside successively；Described cable inner core (3) is formed by many insulation core wires (5) are stranded, is provided with the packed layer (4) for blocking water in the stranded space of described many insulation core wires (5)；Described insulation core wire (5) includes conductor group (7) and is coated on described conductor group (7) insulating barrier (6) outward, described conductor group (7) is formed by many copper wires (8) and the many silk that blocks water (9) bundle strands, filament diameter before the imbibition of the described silk that blocks water (9) is less than or equal to the filament diameter of described copper wire (8), and the filament diameter of described copper wire (8) is less than 0.2mm.
2. combination water-proof cable according to claim 1, it is characterised in that the filament diameter of described copper wire (8) is less than 0.18mm, and the monofilament percentage elongation of described copper wire (8) is more than 20%.
3. combination water-proof cable according to claim 1, it is characterised in that described in block water the expansion rate of silk (9) more than or equal to 8mm/min, described in block water the diameter after silk (9) imbibition more than or equal to 12mm.
4. combination water-proof cable according to claim 1, it is characterised in that the thickness of described insulating barrier (6) is 0.2mm～0.8mm.
5. combination water-proof cable according to claim 1, it is characterised in that described packed layer (4) is waterproofing rope.
6. combination water-proof cable according to claim 1, it is characterised in that described sealing coat (2) is formed by aluminium-plastic tape is wrapped, the thickness of described sealing coat (2) is more than or equal to 0.05mm.
7. combination water-proof cable according to claim 1, it is characterised in that described restrictive coating (1) is made up of halogen-free and low-smoke flame-retardant polyolefin composite, the thickness of described restrictive coating (1) is 1mm～1.5mm.
8. combination water-proof cable according to claim 7, it is characterised in that described halogen-free and low-smoke flame-retardant polyolefin composite includes by mass fraction: EVA40～60 part, Mg (OH)2Or AL (OH)3160～190 parts, LDPE30～50 part, compatilizer 5～20 parts, synergist 2～4 parts and stabilizer 0.5～1 part.
9. a combination water-proof cable, it is characterised in that include cable inner core (3), and it is coated on the outer sealing coat (2) of described cable inner core (3) and restrictive coating (1) from inside to outside successively；Described cable inner core (3) is formed by many insulation core wires (5) are stranded, is provided with the packed layer (4) for blocking water in the stranded space of described many insulation core wires (5)；
Described insulation core wire (5) includes conductor group (7) and is coated on described conductor group (7) insulating barrier (6) outward, described conductor group (7) includes the first conductor layer (7a) being positioned at described conductor group (7) center, it is coated on described first conductor layer (7a) the second conductor layer (7b) outward, and it is embedded the silk that blocks water (9) between described first conductor layer (7a) and described second conductor layer (7b), described first conductor layer (7a) is formed by many copper wires (8) are stranded, described second conductor layer (7b) is arranged to make up by many copper wires (8) are rounded, and it is looped around described first conductor layer (7a) outward；Filament diameter before the imbibition of the described silk that blocks water (9) is less than or equal to the filament diameter of described copper wire (8), and the filament diameter of described copper wire (8) is less than 0.2mm.
10. the preparation method combining water-proof cable, it is characterised in that comprise the following steps:
S1, prepare conductor group: after stranded to copper wire (8) and the silk that blocks water (9), obtain conductor group (7)；
S2, extruded insulation layer: adopt plsitive mold the outer extruded insulation layer (6) of described conductor group (7) to obtain insulation core wire (5)；
S3, wrapped sealing coat: by stranded for many described insulation core wires (5), and in the stranded gap of described many insulation core wires (5), fill waterproofing rope, to obtain cable inner core (3), sealing coat (2) is evenly coated at described cable inner core (3) outward, and described sealing coat (2) is formed by aluminium-plastic tape is wrapped；
S4, extrude restrictive coating: adopt the mode of extruding that the restrictive coating (1) prepared by halogen-free and low-smoke flame-retardant polyolefin composite is evenly coated at described sealing coat (2) outward.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937528A (en) * | 2022-04-29 | 2022-08-23 | 远东电缆有限公司 | Conductor water-blocking high-tensile high-cold-resistance optical fiber monitoring power cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114937528A (en) * | 2022-04-29 | 2022-08-23 | 远东电缆有限公司 | Conductor water-blocking high-tensile high-cold-resistance optical fiber monitoring power cable |
| CN114937528B (en) * | 2022-04-29 | 2023-11-28 | 远东电缆有限公司 | Conductor water-blocking high-tensile Gao Naihan optical fiber monitoring power cable |
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Application publication date: 20160727 |