SU1320912A2 - Induction furnace for heating flat ingots - Google Patents

Abstract

The invention relates to the field of electrical engineering, in particular, to high-speed induction heating before rolling billets (slabs) in the shape of a parallelepiped, in which all linear dimensions are much greater than the depth of current penetration into the heated metal, and is an improvement to the well-known induction furnace described in . - 1170635. The purpose of the invention is to increase efficiency by reducing losses and reducing power consumption. The induction furnace contains an inductor with straight winding sections 1 located at a minimum distance of 2 from the workpiece. The magnetic core 3 is placed outside. The side windings of the winding are spread apart through one turn and form the inner 4 and outer 5 layers. Additional conductors are connected to HPIM in at least one of the layers. Thus, by increasing the active cross section, the losses are reduced, the efficiency is increased and the power consumption is reduced. 12 il. (L C 1 g FIG. G

Description

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The invention relates to high-speed induction heating before rolling billets (slabs) in the shape of a parallelepiped, in which all linear dimensions are much greater than the depth of current penetration into the heated metal.

. The purpose of the invention is to increase efficiency by reducing losses and reducing power consumption.

Fig. 1 shows an inductor with a cross section winding; 2 is a section A-A in FIG. 1 (section of turns in the middle zone of the winding); FIGS. 3-8 shows a section B-B in FIG. 1 (versions of coils in the side portions of the winding; FIGS. 9 and 10, node I in FIG. 3; FIG. 11, node II in FIG. 6; on Fig - axonometric side of the winding.

The cues in the middle part of the winding along its width have straight sections 1 located at a minimum distance from the research institute 2. In the same part of the inductor, packages of the magnetic cores 3 are placed on the outside of the winding.

In the side portions of the winding, the coils are expanded and through one are displaced relative to the other, forming two layers: inner 4 and outer 5. Additional side conductors 6, made in the form of conductive plates, are attached to the side frequent coils in at least one of the displaced windings. Attaching them can be done by welding, soldering and aphids.

Additional conductors can be connected to the turns in both layers of the winding (Figs. 3 and 6); to the turns of the outer layer of the winding (figure 4 and 7); to the turns of the inner layer of the winding (fig.Z and 8).

The conductors can be connected to the turns on one side (FIGS. 3-5) or on both sides of each turn (FIGS. 6-8).

Additional conductors have a width not exceeding the size of the normal cross section of the coil in the central part of the winding, which is determined by design 209122

opportunity package, and form a spa package of 7 of the two conductors.

The conductors may also be 5 hollow.

The process of induction heating in the proposed induction furnace proceeds as follows.

With the transport means, the cooking is set in the inductor. A power supply is applied to the winding of the inductor and a current flows through its coils. In the lateral frequent windings, its coils in the presence of additional current 5 wires have an increased active cross section, which reduces the current density in both layers of the side part, as a result of which ohmic losses are reduced in addition to reducing them

20, due to the separation of the coils, as a result of which the ohmic losses in the inductor as a whole are reduced, the efficiency and energy consumption are reduced. The winding of the proposed inductor

 can be assembled from individual turns or sections consisting of several turns. Since the latter have a complex shape, special equipment is used to form them.

 in the form of patterns on which these coils are placed in places of bending in a heated state. After forming on the template, additional conductors are connected to the main part of the winding 35 and, if necessary, fittings are used to supply cooling water.

Claims (1)

Invention Formula Induction furnace for heating flat ingots according to ed.St. 1170635, characterized in that, in order to increase efficiency by reducing losses and reducing energy consumption, conductive plates are connected to coils in the side portions of the winding in at least one layer and on one of the coil sides. Fig.Z I Phage.E 11  WITH w to one t - 6 $ s . / 2 Editor M.Petrova Compiled by O. Shchedrina Tehred M. Khodanich Proofreader M. Sharoshi Order 2669/57 Circulation 801 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, And