CN201017714Y - Bird pecking prevention communication cable - Google Patents

Abstract

The utility model relates to a bird damage prevention communications cable. A polyethylene insulating layer, a polyester wrapping layer, an aluminum-plastic shielding tape, a polyethylene sheath layer, an armoring layer, and a polyethylene outer sheath are wrapped outside a wire core in sequence. The utility model has the advantages that because of the adoption of the technical proposal, a firm armor is wore on the communications cable, the bird can not damage, the injury to the people and the environmental pollution can not be caused, not only can the bird damage be prevented, but also the shotgun which endangers the cable can be prevented when the people shoot the bird with the gun. A steel strip coated with corrosion prevention material is added outside the utility model, a layer of higher high molecular polyethylene with low moisture vapor transmission coefficient is added at the most outer surface, thereby making the cable service life is prolonged over one time; and the shielding characteristic is improved by about one time than the original cable when the electric field intensity is higher.

Description

Anti-unfirmly closing telecommunication cable

Technical field: the utility model relates to a kind of cable, especially relates to a kind of anti-unfirmly closing telecommunication cable.

Background technology: the major function of cable is used for transmission of audio, 150kHz and following analog signal and 2048kbit/s and following digital signal.Also can be used for transmitting the above digital signal of 2048kbit/s under certain condition.In recent years,, influenced the circuit normal communication, and increased to line crew and repair more than trouble repeatly because the telecommunication cable in woods area, rural area, various places is subjected to birds destruction in various degree.Because the happiness of this birds natural disposition is pecked, the built on stilts telecommunication cable in the jungle also regular meeting is taken as trunk and pips, and communication line often breaks down, and the cross-talk phenomenon gently then occurs, and is heavy then communication disruption takes place.The measure of being taked at present has: the employing outer jacket is that red cable, sheath confidential reference items are gone into the medicine protection and taked hard sheath to protect, dosed flavor material, increase cable clip length and iron clad skin or the like on cable; But take the effect that obtains after these measures all undesirable, the communication rush repair personnel feel simply helpless to this, can only be timely replacings.The repellant method is the more a kind of method that adopts at present, and is less to environmental hazard, belongs to no cytotoxic drug, at home and abroad praised highly at present.And in the medicine method, no matter be any medicine, poison, repellant, the compatibility in macromolecular material is relatively poor, if the repellent formulation does not have material to scatter and disappear, also can not produce smell, thereby loses efficacy easily, also has certain half-life, and timeliness can be too not of a specified duration.Medicine poisoning method is the long-term a kind of method of preventing and treating that adopts on the China market; still have the people using now; but all can be closed down in the place that environmental requirement is high; because bird is human friend; many still state guarantee animals; can not poison them, and the sense of smell of birds is very poor, is not suitable for adopting medicine " repellent " method.Adopt the charged method of driveing of sheath also inadvisable, external electric field can the interfere with communications signal, and birds can not get an electric shock on high-tension bus-bar, still more low pressure light current." warning coloration " method is intended comparatively disagreeable insect of imitative birds or the figure of its animal that fears etc., in case bad cable of unfirmly closing.But this method effectively, above after the regular hour, also can lose efficacy in certain time limit.Cable accounts for 1/3rd of signal equipment investment, and we expect that cable can reach the useful life in 40 years.In essence, reaching on electric continuously and making the suitable ground connection of metal is in order to reach safety and cable noiselessness in use.No matter these cables take which kind of system of laying (built on stilts, pipeline, direct-burried), all will be in the complex environment of a kind of biology, chemistry and physics.Original cable may be because installation, the mal-condition when laying, rock, damaged by rats, thunderbolt, frost and excavation etc. be former thereby damaged, therefore metallic shield near sheath then may be exposed in soil, the air, it is dangerous to produce corrosion, thereby influence communication quality, serious then will change cable.Densely-populated district in the city, communication network, power delivery networks, electric traction network all tightly are close together and lay.Therefore, it is more even more important than in the past that eletric power induction problem becomes.

Summary of the invention:

The purpose of this utility model provides and a kind ofly can prevent bird pest and the anti-unfirmly closing telecommunication cable that anti-corrosive properties are strong, shielding is high; The purpose of this utility model is achieved through the following technical solutions:

A kind of anti-unfirmly closing telecommunication cable, comprise core, polyethylene layer, polyester lapping layer, plastic-aluminum mask tape, polyethylene sheath, its core outside is surrounded by polyethylene layer, polyester lapping layer, plastic-aluminum mask tape, polyethylene sheath, armour, polyethylene oversheath successively.

The utility model has the advantages that: owing to adopt technique scheme, make telecommunication cable put on the solid armor, unfirmly closing is motionless, can not cause people's the injury and the pollution of environment, not only prevent bird pest, in the time of can also preventing human gunslinging birds, the shotgun shot jeopardizes cable.Outside of the present utility model is many, and one deck scribbles the steel band of preserver, outermost the is much thicker little high-molecular polythene of moisture vapor transmission coefficient of one deck, thereby make cable life prolongation more than one times; And when electric field strength was higher, shielding character improved nearly one times than original cable.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Embodiment: with reference to Fig. 1, anti-unfirmly closing telecommunication cable by: core 1, polyethylene layer 2, polyester lapping layer 3, plastic-aluminum mask tape 4, polyethylene sheath 5, armour 6, polyethylene oversheath 7 are formed.The core outside is surrounded by polyethylene layer, polyester lapping layer, plastic-aluminum mask tape, polyethylene sheath, armour, polyethylene oversheath successively.The copper conductor that core 1 adopts the anaerobic round copper rod of GB3953 standard code to draw, surface rounding, physical dimension are stablized, the whole lead non junction of cable produced or employing cold welding connect, conductor resistance is little, conduct electricity very well, polyethylene layer 2 adopts the polyolefin insulation material of YD/T760 standard code, the insulation resistance height, tensile strength, anti-good insulation preformance are ensured the quality of products; Polyester lapping layer 3 adopts non-hygroscopic polyester film wrapped, good heat resistance, gains in strength; The two-sided aluminum plastic composite belt longitudinal bag of YD/T723 standard code is adopted in plastic-aluminum mask tape 4, and aluminium strip is thick: 0.2mm, and shielding properties is strong, good airproof performance; Armour 6 adopts: the armoured cable galvanized steel strip of GB4175.2 standard code; Armour is to strengthen mechanical performance, shielding properties and the lightning protection properties of cable.Polyethylene oversheath 7 adopts the polyethylene sheath material of GB/T15065 standard code, and this material is low temperature resistant and the thermal stress cracking behavior is strong, good seal, mechanical strength height, ageing-resistant and radiation proof; Polyethylene oversheath 7 is used to prevent the armour corrosion, and the protection armouring tape is difficult for scattering.

Product is applicable to the city and the small towns telecommunication line of local telecommunication net, also is applicable to the private network circuit that inserts public network.When built on stilts the installation, need support with messenger wire.

Claims (1)

1. anti-unfirmly closing telecommunication cable, comprise core, polyethylene layer, polyester lapping layer, plastic-aluminum mask tape, polyethylene sheath, it is characterized in that: the core outside is surrounded by polyethylene layer, polyester lapping layer, plastic-aluminum mask tape, polyethylene sheath, armour, polyethylene oversheath successively.

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