CN2911887Y - Cables - Google Patents

Abstract

The utility model relates to a cable, comprising a central cable core and an external conductor. The cable core is twisted by at least five nonferrous metal wires or covered wires, and at least one metal wire with insulation or optical fiber is arranged at the center of the metal twisted wire; the cable core is twisted by at least five nonferrous metal wires, and one metal wire with insulation or optical fiber is arranged at the center of the metal twisted wire; the external circle of the metal twisted wire is connected with or embedded in the aluminum alloy conductor wrapped externally; the external aluminum alloy conductor is made of the alloy of magnesium, zinc and aluminum or common aluminum alloy material; the twisted wire is a multi-folded yarn twisted by a plurality of single-fold metal wires or insulation wires via the wire and cable equipment. The utility model is characterized in good conducting property, strong tensile strength, good resistance to corrosion, low production cost without pollution, clean exterior, uniform wall thickness, long service life, small bending radius and convenient construction etc.

Description

A kind of cable

Technical field

The utility model relates to the cable of a kind of transmission of electricity or signal of telecommunication transmission, especially a kind of railway signal earth cable, it belongs to technical field of electric wires and cables.

Background technology

Along with the development of the progress of science and technology and society, the transmission requirement of signals such as electric power, communication is also more and more higher, the cable purposes that needs shielding also more and more widely, and environmental requirement is also more and more important; The for example present Through ground wire of laying along the trunk railway total length, not only require this line earth resistance little, make equipment ground safe and reliable, excellent contact is arranged and stable corrosion resistance is arranged with soil, and require pollution-freely, need have the holding wire of break alarm or communication function.

The Through ground wire of home and abroad use at present is the sheath copper cash, outside copper stranded conductor, coat the plumbous cover of one deck, utilize the plumbous electric conductivity and the requirement of anti-soil corrosion sexual satisfaction Through ground wire, but in using following problem has appearred: 1. be poisonous heavy metal because of lead, although its anticorrosive property is good, can cause severe contamination to soil and water when directly burying when underground, also can contaminated air in manufacture course of products and operating personnel are caused harmful effect, because of this product does not meet environmental requirement, the national environmental protection department and the Ministry of Railways have proposed restriction and have continued to use.2. existing sheath copper Through ground wire is laid in underground back as breaking, and as construction, stolen etc., operating management department then can't in time be known, and causes the improper running of train, has potential safety hazard.3. Qian plasticity is poor, and minor radius is crooked and be subjected to external force effect damage easy to crack, gives construction and brings harmful effect useful life.4. appearance is not bright and clean, and production technology is outmoded, and production efficiency is low, is not suitable for length production.In view of above reason, authorities of the Ministry of Railways and relevant design, applying unit proposes to the manufacturing enterprise that produces Through ground wire, wishes to develop to meet environmental protection, electric property and Corrosion Protection all meet the demands, and have the novel railway perforation cable of break alarm function.

Summary of the invention:

The purpose of this utility model is to overcome the shortcoming of above-mentioned existence, and a kind of advanced technology is provided, and technology is reasonable, and composite quality is good, the long-life, the communication signal line is arranged, the cable of non-environmental-pollution.It is made of middle cable core and outer conductor, and described cable core is stranded the forming of holding wire by at least five non-ferrous metal wire rods or tape insulation, has the metal wire or the optical fiber of a tape insulation at least at the positive center of twisted wire.

Described cable core forms by the line more than five is stranded, and the metal wire or the optical fiber of an above tape insulation is arranged at the center of twisted wire.

The outer ring portion of described twisted wire contacts with the outer aluminium alloy outer conductor that coats or is chimeric mutually.

Described aluminium alloy outer conductor is that magnesium aluminium alloy material or aluminium alloy are made.

Metal twisted wire described in the utility model is metal wire or the optical fiber with many single-wire or tape insulation, is twisted into one multiply metal wire through cable equipment.

The utility model compared with prior art has following technical characterstic: 1. substitute traditional clad material lead with novel magnesium allumen, have good conductivity, pollution-free, advantage such as tensile strength height, corrosion resistance are strong, reduce cost.2. will unite two into one because of break alarm holding wire and the electric-power ground wire that construction, theft, natural calamity cause.3. cable product any surface finish, wall thickness is even, and length is big, and production efficiency increases substantially, easy damaged not in the little construction of bending radius, service life is more than 50 years.4. at present still belong to blank with this material, technological process production electric railway with Through ground wire both at home and abroad.5. sheath copper Through ground wire has limited use, and this product is an optimal substitute of present stage.

Description of drawings:

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

Fig. 2 is an another kind of cable product structural representation of the present utility model.

Fig. 3 is another cable product structural representation of the present utility model.

Embodiment:

The utility model mainly is made of middle cable core and outer conductor, and described cable core is by at least five non-ferrous metal wire rods or insulated wire is stranded forms, and has the metal wire or the optical fiber of a conductor or tape insulation at least at the positive center of twisted wire; Described cable core is by five bursts of stranded forming of metal wire, has one to thoroughly do away with the metal wire of edge or optical fiber as holding wire at the center of metal twisted wire; The outer ring portion of described metal twisted wire contacts with the outer aluminium alloy outer conductor that coats or is chimeric mutually; Described aluminium alloy outer conductor is made for the magnesium aluminium alloy material.Metal twisted wire described in the utility model is to be twisted into one multiply metal wire through cable equipment with many single-wire.

Shown in Figure 1 is the product structure schematic diagram of no center signal line of the present utility model, and its cable product is formed by five above metal twisted wires 1 with by magnesium allumen outer conductor 2.

Shown in Figure 2 is the product structure schematic diagram that there is holding wire at center of the present utility model, and this cable product includes holding wire 3,4, five above metal twisted wires 1 of insulator, magnesium allumen outer conductor 2.

Shown in Figure 3 is the product structure schematic diagram that stranded wire of the present utility model is insulated wire, and this cable product comprises: 3, five of metal inner wire holding wires are with upper insulator twisted wire 1, magnesium allumen outer conductor 2.

Above-mentioned cable product, its outer conductor outside can not add the plastic cement sheath; Outer conductor also can be made with common aluminum alloy, but adds the plastic cement sheath in order to increase the service life.Described metal wire can be a copper cash, also can be aluminum steel or other non ferrous wire commonly used.

Claims (5)

1, a kind of cable, it is made of middle cable core and outer conductor, it is characterized in that described cable core is by at least five non-ferrous metal wire rods or insulated wire is stranded to form, and has the metal wire or the optical fiber of a conductor or tape insulation at least at the positive center of twisted wire.

2, cable according to claim 1 is characterized in that described cable core by five stranded forming of metal wire, has the metal wire or the optical fiber of a tape insulation at the center of metal twisted wire.

3, cable according to claim 2, the outer ring portion that it is characterized in that described twisted wire contacts with the outer aluminium alloy outer conductor that coats or is chimeric mutually.

4, cable according to claim 3 is characterized in that described aluminium alloy outer conductor is that magnesium allumen or common aluminum alloy material are made.

5,, it is characterized in that described metal twisted wire is metal wire or the optical fiber with many single-wire or tape insulation, is twisted into one multi cord through cable equipment according to claim 1 or 2 or 3 described cables.