RU2349649C1 - Rotation facility of melting retort furnace - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: facility is implemented in the form of two pairs of pivotally connected levers, located symmetrically from both sides of furnace, top levers of which by one end is pivotally fixed on reference ring, and bottom levers are pivotally fixed on platform. Force mechanism for influence upon levers is implemented in the form of two screw pairs, body of each pair is pivotally connected with support point, rigid on side surface of retort furnace body, and feed screw of each force mechanism is pivotally connected to bottom lever. Horizontal axis of furnace turn is displaced relative to furnace symmetry axis.

EFFECT: reliability and durability in running.

6 dwg

Description

The invention relates to the field of metallurgical engineering, mainly to devices for turning melting retort furnaces.

A converter is known, on the drive axle of which the hub of the central gear wheel of the gearbox with a gear ratio of 14.118 is fixed. The gear housing on the rolling bearings is centered on the hub and is prevented from turning around by a buffer link with spring and hydraulic shock absorbers to damp vibrations during start-up and braking. Four mounted drives are mounted on the four output ends of the gear shaft of the special gearbox, consisting of a 29 kW flanged electric motor and a high-speed two-stage gearbox with a gear ratio of 51.1. The connection of the electric motor with the gearbox is provided by a gear clutch. The hinged drive is kept from turning by a buffer device with a spring shock absorber. An emergency turn drive is provided: four TDP brakes are used to brake the converter, and for emergency stops, a mechanical brake is used together with electric motor braking (Mechanical equipment of non-ferrous metallurgy plants: A textbook for high schools. In 3 parts. Part 2. L.S. Kokhan , A.I. Sapko, A.Ya. Zhuk. “Mechanical equipment of workshops for the production of non-ferrous metals.” M .: Metallurgy, 1988, p.96-97).

The complex design and the large mass of the existing drive indicate difficulties in repair and maintenance. The drive is fully rotatable, which is not required for technological parameters. The gear wheel is subject to accelerated wear, which entails a reduction in the overhaul period.

A known converter adopted for the prototype, which contains a housing, a support ring with pins, a bandage with a shoulder and a vertical flange, connected to the housing and installed in the support ring and the device for turning the converter. On the shoulder, on two pairs of spring-loaded rollers, a movable carriage equipped with a wedge is installed. A drive crank shaft of a reciprocating movement mechanism including a connecting rod, an axle and a thrust is located in the hollow pin. The crank shaft of the rotation device is connected to the gearbox and the engine through a clutch. The carriage is equipped with a swinging two-arm lever, one end of which is in contact with the wedge, and the other is pivotally connected to the thrust of the reciprocating mechanism. The end of the lever in contact with the wedge is connected to it by means of articulated rods having a slot in one of the hinges. Opposite the wedge, a support insert contacts the shoulder, which abuts the carriage body along an arc of a circle. The wedge and the liner from falling out are kept from below by trims. An adjustable rotation limiter in the form of a screw is installed on the carriage. The rod is connected to the axis by means of a ball joint. Rollers with vertical axes of rotation are mounted on angular levers, the axes of which are installed in the carriage body and are pressed to the ring by springs, which are compressed by adjusting nuts. Tapered rollers with horizontal axes of rotation are axially tightened by springs adjustable with nuts (certificate of authorship No. 1560567, IPC С21С 5/50, publ. 1990).

The complex design and the large mass of the existing drive indicate difficulties in repair and maintenance. The drive is fully rotatable, which is not required by technological parameters

The technical result of the invention is to eliminate the above drawbacks, that is, simplifying the design of the rotation mechanism, improving the reliability and maintainability of both the rotation device itself and the melting retort furnace (converter).

The technical result is achieved in that the rotation device of the melting retort furnaces, comprising levers, a power mechanism, two racks installed on the platform, on which the trunks of the melting retort furnace with a support ring are placed in the pins, according to the invention, the device is made in the form of two pairs of articulated levers arranged symmetrically on both sides of the furnace, the upper levers of which at one end are pivotally mounted on the support ring, and the lower levers are pivotally mounted on the platform, the power mechanism for impact the levers are made in the form of two screw pairs, the case of each pair is pivotally connected to a support platform rigidly fixed to the side surface of the retort furnace body, and the feed screw of each power mechanism is pivotally connected to the lower lever, and the horizontal axis of rotation of the furnace is offset relative to the axis of symmetry of the furnace.

The rotation device of the melting retort furnaces is illustrated by drawings, in which Fig. 1 shows a general view of a vertical converter with a rotation device, in Fig. 2 is a front view, in Fig. 3 is a connection of the levers of a furnace rotation device, in Figs. 4-6 are kinematic schemes turning the converter.

The rotation device of the melting retort furnaces comprises upper levers 1, lower levers 2, a pivot joint 3 of the upper 1 and lower 2 levers, a platform 4 and a pivot joint 5 of the lower levers 2 with a platform 4, a hinge 6 connecting the upper levers 1 with a support ring 7, which the pins 8 rests on the supports 9. The power mechanism for acting on the levers is presented in the form of two screw pairs, each of which contains a worm gear housing 10, connected by a hinge 11 with a support platform 12, mounted on the side surface of the lower part of the housing 13 melting furnace. The screw pair includes a feed screw 14, which is connected via a hinge 15 to the lower arm 2, a worm wheel nut, which are housed in the housing 10, and an asynchronous electric motor (not shown in the drawing).

Before work, the melting retort furnace (for example, a converter) is in a vertical position (figure 4). In operation, the converter is tilted by the rotation device 10 ° to load the source material (figure 5), after loading the furnace must be turned to its original position (figure 4), in which the conversion takes place. After melting, the metal must be poured into the ladle. To perform this task, the furnace must be rotated from a vertical position by an angle of 110 ° (Fig.6). The operation of turning the furnace by 10 ° and 110 ° is as follows: asynchronous motors of the worm gearboxes 10 are turned on, rotating worms drive the worm wheels to rotate. The Central holes of the worm wheels are made in the form of nuts, the rotation of which translates the feed screws 14, which act on the levers 2. From the levers 2 through the hinges 3, the movement is transmitted to the levers 1 and through the hinges 6 and the support ring 7 the converter is rotated around the pins 8. Since each screw pair with a hinge 11 is fixed on the support platform 12 of the converter, when the efforts of each feed screw 14 act on the lever system 1, 2, there is also a force acting on the converter itself, helping it to bend in yam or reverse direction by reversing the direction of rotation of motors.

The offset of the horizontal trunnions 8 relative to the axis of symmetry OO _{1 of the} furnace (diametrical arrangement) by the value X (chordal arrangement) facilitates the rotation of the working converter with the metal. In case of failure of the furnace turning device, the converter may spontaneously turn at such an angle α at which pouring of the melt from the furnace does not occur. The value of X is found by the formula

,

,

where X is the desired displacement of the horizontal pins 8 relative to the axis of symmetry of the furnace;

α = 45 ° - the angle of the safe position of the furnace, at which the pouring of the melt from the furnace does not occur;

Y is the height of the center of mass of the empty furnace relative to the horizontal plane in which the axis of the pins 8 is located.

From the formula it follows that X = Y is the optimal position of the horizontal trunnions 8 of the furnace.

Thus, the proposed rotation device of the melting retort furnace provides both reliability and durability in operation, and simplification in design. In addition, the device provides a reduction in size and helps to reduce energy costs and efforts aimed at the operation of turning the furnace to the required angle.

Claims (1)

A device for turning melting retort furnaces containing levers, a power mechanism for acting on the levers installed on the platform are two racks on which the trunks of the melting retort furnace with a support ring are located in pins, characterized in that it has two pairs of articulated upper and lower levers, located symmetrically on both sides of the furnace, with the upper levers at one end pivotally mounted on the support ring, and the lower levers pivotally mounted on the platform, the power mechanism for acting on the levers in the form of two screw pairs having a housing and a feed screw, wherein the housing of each pair is pivotally connected to a support pad rigidly fixed to the side surface of the retort furnace body, and the supply screw of each screw pair is pivotally connected to the lower arm, and the horizontal trunnions are offset relative to the axis symmetry of the furnace.

Images