SU213051A1 - Machine for replacement of blast furnace tuyeres - Google Patents

Description

(54) MACHINE FOR THE CHANGE OF THE DIFFERENT DOMAIN NO.

Machines are known for changing the blast furnace tuyeres, consisting of a telley moving along an annular rail track and a frame suspended to it, on which are placed the drives and a trolley carrying a pneumatic hammer for driving and tuyere tuyeres. The blows from the pneumatic hammer are transmitted through a massive rod, which absorbs a significant part of the impact energy, which makes it necessary to use high-power machines.

Known machine bulky and unreliable in operation.

In order to increase the reliability of the operation of the machine, it is proposed to mount the pneumatic hammer into the pneumatic cylinder stem, which carries the cavity through valves and spools embedded in its piston, connected to the hammer distributor valve, into the bearing grippers.

FIG. 1 shows the proposed machine; in fig. 2 - car with airlock; in fig. 3 - pneumatic cylinder with integrated pneumatic hammer in two projections.

The machine consists of a carrier plate 1, a pneumatic cylinder 2, a pneumatic hammer 3 and a lance gripping mechanism 4.

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The 5 trolleys supported on the outer and inner rails have different diameters in order to allow them to roll on the rails without slipping when rotated from a single drive. To perceive the horizontal forces arising from the machine operation and its movement along the rails around the furnace, two pairs of rollers 6 with vertical axes are mounted on the trolley, covering an additional, thrust annular rail mounted on the same brackets as the running tracks. In the lower part of the frame of the trolley there are two supporting rollers 7, which receive the forces from the tilting moment that occurs when driving or knocking tuyeres.

A bracket 8 is fixed on the frame of the telle below, to which the supporting pneumatic cylinder 2 is attached with the help of a flange. In order to reduce the overall length of the machine, the non-climbing cylinder is made telescopic. A pneumatic hammer 3 is built into the inner cylinder 9 of the cylinder, which is intended for driving and tuyere punching. At the front end of the zeros of the rod 10, a tuyere gripping mechanism is fixed, which contains a head 11 with a tong clamp 12. A two valve 13 single-sided real are inserted in the head. clamping tongs. In the body of the head there is a conical bore into which the shank of the interchangeable mandrel (not shown in the drawings) is inserted, which, in turn, is furl1a. The mandrel, used for knocking out the tuyere, is a smooth rod with a tube mounted on it, to the end of which a sleeve with a collar is welded. Before starting the pipe, the pipe is filled with clay, which, when the head 11 is moved, is squeezed forward into the furnace and moves the coke away from the tuyere. The outer diameter of the sleeve corresponds to the diameter of the hole in the flange of the tuyere. The mandrel for driving a lance is equipped with a non-stem: but with a fixed sleeve. On the collar of the sleeve there are two protrusions ending in plugs in which the tuyere hooks enter. The size and shape of the protrusions are chosen so that the tongs could not capture the hooks of the tuyere.

To maintain the pliers with the correct position, a cover is welded to the rear end of the hollow rod 10, having a square hole through which square rod 14 is passed. The rod is fixed in the cap 15 of the outer stem of the bearing cylinder. The outer rod of the carrier cylinder, in turn, is fixed against rotation with the help of a rolling pin 16, fixed in the lid of the inner cavity of the carrier cylinder and passed through a sleeve on its housing. The same rolling pin is used to supply air to the internal cavity of the cylinder.

The air for operation of the hammer is taken from the cavity of the carrier cylinder by means of a valve 17 and a spool 18 embedded in the small piston 19 of the carrier cylinder and connecting the control valve 20 of the pneumatic hammer to the cavity of the carrier cylinder that is currently under pressure. Air to the tick-borne cylinders 13 is also supplied from the cavity of the carrying cylinder through the hollow rod 10 of the pneumatic hammer.

With the appropriate construction of the tuyere device, the machine can be used to change the tuyeres during the blast furnace run. In this case, the bracket is made in the form of a lock chamber 21, inside of which is located the head 11 with the tongs. When the machine is operated, the sluice chamber with the front flange 22 presses against the flange of the shut-off valve of the tuyere unit, thereby allowing the machine working bodies to be inserted into the tuyere instrument without disturbing the furnace sealing. The airlock chamber is attached to the working cylinder with 2 bolts and equipped with four rollers 23 mounted on brackets welded to the camera body. The rollers move in the guides 24 mounted on the trolley 1. To move the lock chamber on the frame of the trolley 1, a hydraulic cylinder 25 is installed. The front flange 22 of the lock chamber is hinged to fit snugly to the flange of the clamping device p

grippers for fastening the sluice chamber to the tuyere instrument for the time of the machine operation. To change the tuyere, the machine is brought to

The tuyere instrument, in which it is necessary to change the tuyere, and stops between it and the adjacent instrument. In this position, a mandrel is installed to remove the tuyere and a pipe is put on it

which is pre-filled with clay so that its rear end on the length of 250-300 mm was free. After that, the lid on the tuyere elbow is folded back, the machine is installed along the axis of the tuyere, and the head 11

with a tick grip is fed forward. When, welded to the pipe with clay, enters the hole of the wagon, and its collar is pressed into the lance of the tuyere, the pipe stops and the mandrel continues to move forward,

pushes the clay out. The force arising from this is transmitted through the mandrel and gripping device to the hollow rod 10, which is pressed against the plate of the valve 17 built into the small piston 19. If the resistance to the movement of the mandrel exceeds the force of the valve spring pre-tightening, the air will pass into the spool 20 pneumatic hammer. The hammer will start working to push the clay out of the pipe.

The air entering the cavity of the working cylinder through the hollow rod 10, passes to the cylinders 13 of the control tongs, and the tongs are compressed.

When approaching the tuyere, the head 11 with the gripping device rests on its end and stops; tongs grab the tuyere hooks. The slave cylinder is then reversed. The rod 10 held by the hooks departs from the valve and the pneumatic hammer communicates with the piston cavity of the cylinder. In advance, the air fed into the rod end of the cylinder transfers the auxiliary valve 18 to another position and enters the pneumatic hammer, which

knocks lance. The removed lance is removed from the machine together with the Olivetka. Instead, a new lance is installed on the machine, it is put on the driver in advance. After that, the head moves forward again. With the emphasis tuyere

A hammer is inserted into the embrasure, which clogs the tuyere. Then the head moves back, removed the mandrel. The machine shifts to the axis of the tuyere unit, after which the lid of the tuyere unit is closed.

The removal of the new tuyere from the wagon of the tuyere and the installation of a new tuyere on it is carried out with the help of a hoist suspended on a cat that can move around the blast furnace along a special monorail.

pneumatic hammer and a tuyere locking mechanism, characterized in that, in order to increase the reliability of its operation, the vacuum tube is mounted into the hydraulic rod / cylinder cylinder, which carries the grippers.

2. Machine but n. 1, characterized in that, in order to connect a pneumatic cylinder's sheet with the hammer's distribution spool, clans and spools are embedded in the piston of the non-cylindrical cylinder.

FIG. one

FIG. 3