SU62012A1 - Device for continuous annealing of cable cores - Google Patents

Description

It is known that during the compaction of copper current-carrying conductors with a cable / leii, the wire is hardened. Copper, on the other hand, has the property of varying its conductivity in the control of the degree of hardening: for example, soft annealed copper has a conductivity of 2–3% more than its content is hard. When compacting the copper cores, the stand-up system reduces their conductivity by 1.0-1.5io. As a result, in order to meet the conductive requirements of the cable cores, when using sealed cores, it is necessary to increase their cross section by 1.0-1.5%. This overspending could be eliminated by re-annealing the compacted cores, however, if equipment existing at cable plants is annealing without capital investment, it is almost impossible to destroy.

The proposed device makes it possible without capital expenditures to suspend the removal of charges from compacted and, consequently, to increase the conductivity of copper.

The device is made in the form of two groups of roller contacts. One group is designed to create the necessary contact area, and the second group is also used to seal the heated / keel.

FIG. 1 shows the obndiy view of the device; in fig. 2, 3, 4 and 5 are different forms of rollers positioning.

(. Twisted from the copper wires of the pit J4 immediately, after the compaction, and I. The rollers, go back to the wrong side, which is installed directly on the twist or turn-up and off-line machine between the unit and the winding unit. The two-way passage between the two grooves of the roller contacts I, 2, 3 and 4, 5, 6 (Fig. 1) is heated by contacts with an electric current to approximately 300-400 to the ETAG. As a result, the copper is heated

AO 62012-- 2 otzhigg1ets. In order to prevent the oxidation of copper, the entire device is Zaku, 1 a and k.ptak 11, in which an overpressure is maintained with water vapor or neutral gas.

In order to cool the contact rollers, hot water is supplied to their internal floor. In addition, they are watered outside the outlets of sockets 16. D; 1 TOio, so that the cooling water does not get into the heated area of the weights. Preservatives are installed. 13. The annealed vein 14 is also cooled with hot water from the outlet 12. Under the outlet 12, Below the passing core 14 is a tray 17, which serves to enhance the cooling of the bottom from the water jets reflected from the tray.

The amount of hot water supplied for cooling the core is adjusted so that the core, the output of the annealing device, already at a distance of 0.3--0.5 lg, dries out.

The hot water produced in the self heating device from,; s 14 and contact rollers flows through pipe 7 into reservoir 18, from a centrifugal pump 6 driven by an electric motor 9, is distilled through a pipeline / 5 into a pressure tank 10, from where re-installs into sockets 16 and 12 for cooling, etc. To regulate the excess vapor pressure inside the pipe, a valve 19 is provided on the steam discharge pipe -O. A valve 21 is required to regulate the water supply through the sockets.

D.1I heating the core provides a non-transformer 22 MOHiHocTbK) of about 200 kV with a current in the wired winding of up to 35,000 a (for a pump with a cross section of up to 240 mm inclusive at an annealing speed of 30 m / min.

In order to create the necessary contact between the core and the contact rollers, nredusmogreny various ways of positioning the rollers, as ego is depicted in FIG. 2, 3, 4.

In order to eliminate the stretching of the heated portion of the core between the contact rollers, the previous ones must have a force synchronous with the machine traction device.

The process of assembly can be carried out directly and completely), using two of the rollers of the contact roller device as roll rollers (for example, rollers / and 2 in Fig. 5 N 1).

When using this type of device, it is possible to twist the core of the ii3 | 1 burnt-off nolovok, annealing it in onisapnoy peppn and placing it heated in rollers / and 2.

Since the conductor can be heated by an electric current for a very short period of time, a similar device can be used to anneal copper or second wire directly in hot air at very high speeds, and not only the winding on the receiving coil, but also in the interval between the spinnerets, eliminating, in such a way. and spanOiHbiii and final. Annealing of the wire in normal for this purpose is not.

In this case, the current layout scheme shown on phi1 will be most appropriate. 3. In order to ensure good contact and exclude the moment of wire drawing between the rollers, the last few holes are made with a wedge-shaped groove (with an angle of less than -15). In addition, the rollers must have a forced drive, c1H1Hronny with a traction device of the machine.

In those cases when the cooling of the wire with water is impossible due to the adhesion properties of the annealed metal, it must be cooled with steam and a jet of neutral gas.

PRIORITY 3 ABOUT AND

Device for continuous annealing of cable cores with heating; electric current, characterized in that it is made in the form of two groups of roller contacts, of which one soil contact is intended to create the necessary contact area, and the second group also to seal the heated core.

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