CN201259797Y

CN201259797Y - Railway synthetic run-through ground wire with conductive macromolecular protection sleeve

Info

Publication number: CN201259797Y
Application number: CNU2008201123189U
Authority: CN
Inventors: 秦保新; 王革; 柳峻岭; 崔芳
Original assignee: Jiaozuo Railway Cable Factory
Current assignee: Jiaozuo Railway Cable Co Ltd
Priority date: 2008-08-20
Filing date: 2008-08-20
Publication date: 2009-06-17
Anticipated expiration: 2018-08-20

Abstract

The utility model discloses a railway comprehensive link-up ground wire with a conductive macromolecular sheath, which comprises a sheath and a cable core; a plurality of twisted conductors are evenly intertwisted together to from the cable core; a breaking alarm insulated solid wire can be twisted in the cable core; and the conductive macromolecular sheath wraps up the cable core. The railway comprehensive link-up ground wire is characterized in that the conductive macromolecular sheath is made of material which takes macromolecular insulating material as the base material, and nanometer-superconducting black carbon and machining addition agent are evenly distributed in the base material. The railway comprehensive link-up ground wire has the advantages that the bleeding speed is quick; heat generated at the time of bleeding is reduced; and the service life of the ground wire is long. The railway comprehensive link-up ground wire satisfies resistance requirement of the sheath of the link-up ground wire. The cable core can be provided with a breaking and short circuit alarm function testing wire if necessary, thus ensuring the safety and reliability of the system.

Description

A kind of conductive high polymer sheath railway combined through ground wire

Technical field:

The utility model relates to a kind of conductive high polymer sheath railway combined through ground wire.

Background technology:

The important component part that combined through ground wire guarantees as railway security, it is the assurance that realizes railway signal transmission equipment and facility reliable ground along the line, but because China is vast in territory, different geographical environments exists bigger potential difference, causes potential threat to railway signal and control system.The a large amount of uses of railway combined through ground wire in railway construction, the grounding system of China railways is connected into a continuous network, make whole signal and control system realize equipotential fully, the system thunder defending to railway communication along the line, signal, electric power, traction power supply engineering etc. plays crucial effects simultaneously.

The combined through ground wire that railway uses at present mainly with plumbous, conductive plastics and conductive rubber as sheath.All there are some problems in these sheaths on different degree.Plumbous have very big contaminative as a heavy metal species, is that environment friendly system is prohibited use; Lead has with the water animal migration, and bury underground meeting and pollute large-area soil, because lead is that its half-life of heavy metal is long in the extreme, be long-term and very difficult elimination so pollute.Lead is a kind of metal in addition, can produce oxidation and corrosion, and particularly the speed of corroding under the environment of highly basic is very fast.Therefore plumbous sheath as railway combined through ground wire is unfavorable.Conductive plastics and conductive rubber are as the sheath material of railway combined through ground wire, though solved environmental issue, but such material is as conductive auxiliary agent with common conductive carbon black at present, common conductive carbon black is because particle is bigger, its particle diameter is greatly about about 100 microns, in material system, can't reach equably and distribute, in material system, distribute and form isolated island structure mostly, can not effectively form solid netted conducting system, and common conductive carbon black specific insulation is more than or equal to 0.8 Ω .cm, electric conductivity is relatively poor, therefore, can't reach very little specific insulation with common conductive carbon black as the conductive plastics and the conductive rubber of conductive auxiliary agent, generally all about 10 Ω .cm, the long-time stability of this conduction system are also relatively poor for their specific insulation.Even if the amount of filling out that rolls up common conductive carbon black is to reach the specific insulation about 1 Ω .cm, but the increase of the common conductive carbon black amount of filling out will be the physical and mechanical properties and the process industrial art performance of whole electric conducting material system to descend, so that can't carry out machine work.So on ground connection effect and long-term stability, all have certain problem as the railway combined through ground wire of sheath with conductive plastics and conductive rubber.

The utility model content:

The purpose of this utility model provides the conductive high polymer sheath railway combined through ground wire that a kind of specific insulation is lower, physical and mechanical properties has environmental-protecting performance well, again.

To achieve these goals, the utility model comprises: sheath, cable core, many stranded conductors evenly twist together the formation cable core mutually, stranded in cable core have a break alarm insulated single wire, conductive high polymer sheath is wrapped in around the cable core, the conductive high polymer sheath material as base-material, is evenly distributed with nano superconductive carbon black and processing aid with insulating polymeric material in base-material.

Because the nano superconductive carbon black has conductivity and well dispersed preferably, so in base-material, add and just can obtain lower specific insulation than small scale, be easy to form continuous solid netted conductive network in system, specific insulation can reach below the 0.7 Ω .cm.The nano superconductive carbon black not only has very high conductivity, base-material is also had the function of reinforcement in system, has improved conductive high polymer sheath physical and mechanical properties and process industrial art performance.It is fast to have earial drainage, the heating when reducing earial drainage, and the ground wire long service life satisfies the requirement of Through ground wire sheath resistance.As required, can add in the ground wire has broken string, short circuit warning function p-wire, guarantees that transmission system is safe and reliable.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a cross-sectional structure schematic diagram of the present utility model.

Embodiment:

As shown in Figure 1, the utility model comprises: sheath 2, cable core 1, many stranded conductors 3 evenly twist together the formation cable core mutually.In cable core break alarm insulated single wire 4 can strandedly be arranged, break alarm insulated single wire 4 is positioned at the centre of cable core, to prevent extraneous interference.Report to the police and quantitatively indication by making broken string, short circuit and the defective insulation situation of Through ground wire to the real-time monitoring of loop resitance between cable core and the outer conductor, can realize guaranteeing the signal transmission system reliable ground owing to Through ground wire fracture back under the artificial or irresistible external force effect is in time found and maintenance.Conductive high polymer sheath 2 is wrapped in around the cable core 1, and the conductive high polymer sheath material as base-material, is evenly distributed with nano superconductive carbon black and processing aid with insulating polymeric material in base-material.Specific insulation is less than 0.7 Ω cm, and it is made and adopts the processing technology that extrudes to process.

Claims

1, a kind of conductive high polymer sheath railway combined through ground wire, comprise: sheath (2), cable core (1), many stranded conductors (3) evenly twist together the formation cable core mutually, stranded in cable core have a break alarm insulated single wire, conductive high polymer sheath is wrapped in around the cable core, it is characterized in that the conductive high polymer sheath material with insulating polymeric material as base-material, in base-material, be evenly distributed with nano superconductive carbon black and processing aid.