RU73061U1 - DEVICE FOR MOVING THE FURNACE WINDOW DOORS - Google Patents

Abstract

The invention relates to the equipment of heating furnaces, in particular to devices that provide effective sealing when closing the furnace shutter, and can be used in ferrous and non-ferrous metallurgy plants in metallurgical furnaces for heating and melting metals. The technical result is an increase in reliability and reduction of heat loss. A device for raising and lowering the furnace shutter comprises a drive, guides and limit stops. To press the shutter against the frame of the furnace window, a rotary pneumatic pusher is installed on the movable frame in the guides, connected to the center of the shutter by a ball joint. With a significant length of the furnace window in width, the damper is made of several leaves, sealed to each other on the sides and each connected by a ball joint with its own pneumatic pusher. Pneumatic pushers are located on a common movable frame. 1 s.p. f-ly, 1 ill.

Description

The invention relates to the equipment of heating furnaces, in particular, to devices that provide effective sealing when closing the furnace shutter, and can be used in ferrous and non-ferrous metallurgy plants in metallurgical furnaces for heating and melting metals.

A device for raising and lowering the furnace shutter is known, comprising a drive, guides, restrictive stops, rollers installed in the guides to interact with stops, and levers pivotally mounted on the shutter and connected to the drive, each lever having an additional arm connected to roller (RF patent No. 2229075, CL F27D 1/18, publ. 05/20/04).

The disadvantage of this device is the design complexity and insufficiently tight contact of the damper with the window frame of the furnace, thereby increasing heat loss.

The proposed utility model solves the problem of reducing heat loss through the damper, as well as improving the reliability of operation. This is achieved by supplying the device with a movable frame in the guides, on which a pneumatic pusher is mounted, connected to the center of the damper by a ball joint. Reduction of heat loss is achieved due to the fact that the damper enters the inside of the furnace and an air gap is formed between the damper and the walls of the oven, which prevents heat from leaving the oven.

With a considerable length of the furnace window in width, it is possible to make a shutter in the form of several flaps densified with each other on the sides, each of which is connected by a ball joint with its own pneumatic pusher, which are located on a common movable frame.

Figure 1 shows the proposed device, side view.

The device consists of a drive 1, for example, a hydraulic cylinder with a flexible coupling 2. A movable frame 3, equipped with protrusions 4, can be moved by means of a drive 1 in the guides 5, supported by rollers 6. A pneumatic follower 7 with a piston 8 is installed on the movable frame 3 the housing, which is connected to the center of the shutter 9 by a ball joint 10, as well as a line 11 with a control valve 12, which operates by the contact sensor 13. In the operating position, the shutter 9 is pressed against the window frame 14 and is supported through the rollers 15 on the stop 16. Around the perimeter damper 9 false flexible refractory sealing material 17. In the raised position of the damper 9 is located against the shield 18.

The device operates as follows. When you turn on the actuator 1 to move the shutter 9 downward, the movable frame 3, under the influence of its own weight, moves along the guides 5 together with the shutter 9, which is held on the movable frame 3 by a pneumatic pusher 7, relying on the tabs 4. Having reached the stop 16, the shutter 9 stops vertical movement, while the movement of the movable frame 3 continues until the entire stroke of the actuator 1 is selected, and until it touches the control valve 12.

After touching the movable frame 3 with the control valve 12, due to the contact sensor 13, air is pumped into the pneumatic pusher 7 through line 11, as a result of which the pusher moves the valve 9 through the ball hinge 10 in the direction of the window frame 14. The valve 9 is rolled on rollers 15 along the stop 16 in the horizontal direction until it contacts the frame of the window 14, so that part of the flap extends into the furnace. At the end of the injection of air into the pneumatic pusher 7, the shutter 9 is pressed against the frame of the window 14 by the force of compressed air.

When opening the shutter 9, the actuator 1 begins to move the movable frame 3 up. The touch of the movable frame 3 with the contact sensor 13 of the control valve 12 stops and the air begins to free the working space of the pneumatic follower 7, as a result of which,

the piston 8 pulls the ball joint 10 behind it, the shutter 9 on the rollers 15 on the stop 16 rolls to the stop 4. Then there is a joint upward movement of the movable frame 3 and the shutter 9 lying on it in a position opposite the protective screen 18.

Using the proposed device will reduce heat loss due to the fact that the damper enters the inside of the oven and an air gap is formed between the walls of the oven and the damper, which prevents heat from leaving the oven, and also increase the reliability of operation by using a pneumatic actuator as a pusher.

Claims (1)

A device for moving a furnace window shutter, comprising a shutter with a lining, limit stops, an actuator and a movable frame with a pusher connected to the shutter, characterized in that the shutter lining is provided with a protrusion; the pusher is made in the form of a pneumatic actuator with a control valve switched by a movable frame.