CN2192862Y

CN2192862Y - Pipe type cable

Info

Publication number: CN2192862Y
Application number: CN 94241533
Authority: CN
Inventors: 沈庆华; 龚闻音
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-19
Filing date: 1994-03-19
Publication date: 1995-03-22
Anticipated expiration: 2004-03-19

Abstract

The utility model relates to a pipe type cable, comprising a copper joint 1 and a conductive body 2, and the center of the copper joint 1 is provided with a through-hole 3. The utility model is characterized in that the ring placing groove 4 of the copper joint 1 is connected with the conductive body 2; the conductive body 2 is a conductive tube 5 which is knitted by a plurality of bare copper wires, and the center of the conductive tube 5 is a through-hole; a plurality of eyelets 6 are arranged on the conductive tube 5. The utility model can be used at the place the space position is particularly small, and has the advantages of good flexibility, uniform current distribution and high current density, and the current density can reach 5A / mm<2> or higher, and the utilization rate of a conductor can improved by 15 %.

Description

Pipe type cable

The utility model relates to a kind of cable, is specially adapted to the short net of secondary of electric arc furnaces, ladle furnace, power frequency induction furnace etc. in machinery, the field of metallurgy.

At present, in the secondary suspension of employed transformer outputs such as electric arc furnaces, induction furnace, generally adopting flexible exposed copper cable, because flexible naked cable electric current per unit length is not high, generally only is 1.4～1.7A/mm ²And a large-scale stove needs many such cable parallel operations, its caloric value is big, expense material and the locus that occupies are big, be not easy to even can't install, so present electric furnace arrangement for producing steel more than 5 tons is used the water-cooled cable instead more, a kind of " the big electric current water-cooled cable of beaming type device " as Chinese patent 90211547.2 propositions, the connector at cable two ends is all used water cooling, the exposed copper twisted wire enters copper sleeve with cold xtrusion, the adjacent copper stranded conductor of each strand is separated by with spacing screen along its length, and intrafascicular of exposed copper twisted wire has central support tube, and central support tube communicates with the central through hole of joint.Though the cable of this structure has certain effect to the cooling of copper stranded conductor, cable flexibility is poor, and because the influence of " kelvin effect " of electric current, CURRENT DISTRIBUTION is inhomogeneous in the cable, conduction density is low, and the conductor utilization rate is low, and copper stranded conductor inside can't be cooled off fully.

The purpose of this utility model is exactly in order to overcome above-mentioned deficiency, provide that a kind of cable flexibility is good, CURRENT DISTRIBUTION evenly, conduction density height, conductor utilization rate height, a kind of pipe type cable that the life-span is long.

The utility model is achieved in that a kind of pipe type cable, comprise that there is central through hole 3 at copper sleeve 1, conductive body 2, copper sleeve 1 center, the placement annular groove 4 that it is characterized in that copper sleeve 3 connects conductive body 2, described conductive body 2 be by some exposed copper wires weave into form, contact tube 5 that the center is through hole, the eyelet 6 that has braiding to form on the described contact tube 5.Placing annular groove 4 is annular groove, and conductive body 2 is inserted in the groove, makes annular groove and conductive body 2 be linked as an integral body by hot and cold fashion of extrusion.The exposed copper wire that braiding contact tube 5 is used, its diameter can be identical, also can be different, the eyelet 6 that braiding forms also can be greatly, can be little, even the big each other I of eyelet 6 is inconsistent.Because eyelet 6 is a lot of on the contact tube 5, the heat that the utmost point is beneficial to contact tube 5 scatters and disappears; Eyelet 6 because of stretch or compression also very easily in producing deformation, thereby contact tube 5 has good deformation nature, causes of the present utility model flexible fine.

Conductive body 2 described in the utility model can also be the multiple tube that is formed by some contact tubes 5 fits.Promptly put one, two or the more contact tubes that diameter is bigger again, can improve the captured area of a conductive body like this in the outside of a contact tube.

Sebific duct outside the utility model preferably is provided with outside conductive body 2.Can feed water, wet goods cooling medium so outside in the sebific duct,, can make conductive body 2 obtain fabulous cooling owing to have the eyelet 6 that a lot of braidings form on the contact tube 5.

The utility model has made full use of electric current " kelvin effect " phenomenon, and adopt contact tube that exposed copper wire weaves into formation as conductive body, and a lot of eyelets are arranged on the contact tube, so the utility model current density height, can reach 5A/mm ²More than, CURRENT DISTRIBUTION is even, and cable flexibility is good, and the conductor utilization rate can improve 15%, and the life-span is also long.

Fig. 1 is the utility model structural representation;

Fig. 2 is the pipe cable schematic diagram that outer sebific duct is arranged;

Further specify the utility model below by embodiment:

Embodiment 1, with reference to figure 1, is example with 5 tons of required cables of electric furnace, and it needs specified year capacity 9KVA, and every phase cross-section of cable is long-pending to be 8000mm ²Get final product, the sectional area that will form with exposed copper wire braiding is 4000mm ²Conductive body 2 is put into placement annular groove 4 places of copper sleeve 1, with the mode of hot and cold extruding it is connected as a single entity, every 2 of this pipe type cables that need mutually, and in parallel the use, totally 6 of three-phases, this cooling medium is an air.

Embodiment 2, and reference example 1 is characterized in that 8000mm ²Pipe type cable be 5000mm by the cross section ²And 3000mm ²Two contact tube fits form, promptly the contact tube that diameter is little is with the big contact tube of diameter outward.Contact tube links to each other with a annular groove on the copper sleeve, is connected as a single entity by hot and cold extruding, and the type of cooling is the cooling naturally of air.

Embodiment 3, with reference to figure 2, are example with 30 tons of required cables of electric furnace, and it needs specified year capacity 18KVA, and every phase cable needs 6400mm with the beaming type water-cooled cable with big section ²Adopt this pipe type cable, every phase cross-section of cable is long-pending to be 5500mm ²Get final product.The contact tube 5 that will be through hole with the center that exposed copper wire braiding forms is sentenced hot and cold fashion of extrusion with the placement annular groove 4 of copper sleeve 1 and is connected, outside the conductive body 2 that contact tube 5 forms, put sebific duct 7 outside, should can use the high-temperature resistant rubber pipe by outer sebific duct 7, thickness is 10～15mm, and its diameter is generally greater than conductive body 2～5mm.Water flowing cooling in sebific duct 7 and the through hole 3 outside is because perforation 6 on the contact tube 5 can obtain the abundant cooling of cooling water, 0.15 cube/h.m of cooling water consumption between contact tube 5 inside and outside walls and the inside and outside wall.

Claims

1, a kind of pipe type cable, comprise that there is central through hole 3 at copper sleeve 1, conductive body 2, copper sleeve 1 center, the placement annular groove 4 that it is characterized in that copper sleeve 1 connects conductive body 2, described conductive body 2 is by the contact tube 5 that some exposed copper wire braidings form, the center is through hole, the eyelet 6 that has braiding to form on the described contact tube 5.

2, pipe type cable according to claim 1 is characterized in that the multiple tube of described conductive body 2 for being formed by some contact tubes 5 fits.

3, pipe type cable according to claim 1 and 2 is characterized in that being provided with outer sebific duct 7 outside the described conductive body 2.