RU40672U1 - DEVICE FOR OVERLAPPING THE OPERATING WINDOW OF ELECTRIC AND MELTING FURNACE - Google Patents

Abstract

The utility model relates to metallurgy, in particular, to the equipment of electric arc furnaces. The technical goal of the utility model is to increase the reliability of the shutter, reduce furnace downtime, improve working conditions and increase the safety of staff. This goal is achieved by the fact that in the device for closing the working window of the electric steel furnace, the damper is made in the form of a screen connected by fastening to a supporting beam with the possibility of their joint movement relative to the working window using fixedly mounted carriages, while the movement mechanism is made in the form of a chain transmission installed on the carrier beam, and the screen is mounted on the edge of the carrier beam from the side of the working window of the furnace.

Description

The utility model relates to metallurgy, in particular, to the equipment of electric arc furnaces.

The known mechanism for moving the door of the working window of an electric furnace (AS No. 817461, class P 27 D 1/18 publ. 1981) contains a drive guides for moving the door when it is raised and lowered.

The disadvantage of this mechanism is that the guides are located directly at the working window. Clogged slag guides and alignment of the working window make it difficult to move the door. Flames may be emitted from the furnace, which reduces the resistance of the equipment located near it, and makes the furnace difficult to maintain.

Closest to the utility model is the shutter chamber of the furnace (AS No. 718684, class. P 27 D 1/18, publ. 1977).

The disadvantages of this shutter are the proximity of the movement and clamping drives, as well as the movement carriages to the furnace window. Since, when opening the working window of the electric steel furnace, the window alignment becomes contaminated with slag, it is impossible to ensure a tight shutter clip, and the shutter is also difficult to move. This leads to the need for frequent repair of the shutter, increasing downtime of the furnace.

The technical goal of the utility model is to increase the reliability of the shutter, reduce furnace downtime, improve working conditions and increase the safety of staff.

This goal is achieved by the fact that in the device for closing the working window of the electric steel furnace, the damper is made in the form of a screen connected by fastening to a supporting beam with the possibility of their joint movement relative to the working window using fixedly mounted carriages, while the movement mechanism is made in the form of a chain transmission installed on the carrier beam, and the screen is mounted on the edge of the carrier beam from the side of the working window of the furnace.

The utility model is illustrated by drawings:

Figure 1 shows a General view of the device for closing the working window of the electric furnace, front view; figure 2 is the same side view; figure 3 is the same, top view.

The device for closing the working window consists of a screen 1 connected to the carrier beam 2, roller carriages 5 for moving the beam 2, a drive chain 3 mounted on a carrier beam 2, a drive 4, an asterisk 12 of which engages with a drive chain 3, and limit switches 6. Roller carriages 5, drive 4 and limit switches 6 are fixedly mounted on the metal structure 11. Limit stops 10 are provided at the ends of the carrier beam 2. The drive can be made hydraulic, pneumatic or electromechanical (for example, a motor p-reducer).

The device operates as follows:

In the operating position of the device, the screen 1 is opposite the working window 7 (see figure 1). When you turn on the actuator 4 due to the engagement of the sprocket 12 and chain 3, the carrier beam 2 connected to the screen 1 moves to the side of the working window 7 of the electric furnace 8 (9-electrodes of the furnace) using the carriage rollers 5. The device stops in extreme positions automatically due to limit switches 6. Mechanically, the beam travel is limited by limit stops 10.

Due to the fact that the screen is mounted on the edge of the supporting beam and the significant movement of the movement mechanism, in the open position the elements of the device do not interfere with the operation of other technological equipment and the maintenance of the furnace. This allows you to remove the drive, carriages and chain transmission from the zone of high temperatures and emissions from the working window. Overlapping the working window of the furnace is provided by the geometric dimensions of the screen.

Using this device to close the working window allows you to increase the reliability of the shutter, reduce downtime, improve working conditions, improve the safety of staff.

Claims (3)

1. A device for closing the working window of an electric steel furnace, comprising a shutter with a protective layer mounted on the guides, a movement mechanism and a drive, characterized in that the shutter is made in the form of a screen connected by fastening to a carrier beam with the possibility of their joint movement relative to the working window by motionlessly mounted carriages. 2. The device according to claim 1, characterized in that the movement mechanism is made in the form of a chain transmission mounted on a carrier beam. 3. The device according to claim 1, characterized in that the screen is mounted on the edge of the carrier beam from the side of the working window of the furnace.