SU48394A1 - Apparatus for blocking and shuraki slag tap of a blast furnace - Google Patents

Description

The invention relates to an apparatus for blocking and shaving a slag tap of a blast furnace, which is called slag corkscrews in factories. Apparatuses for this purpose are known in various designs, including those in which the crowbar is placed in the fork of the rod. For example, in some factories, the apparatus of the Dango-Dienental system and its modifications are used.

Existing, slag corkscrews, made by the Dango-Dienental type, besides a whole number of fixable defects, have a rather large disadvantage, which, however, cannot be eliminated provided that the basic principle of the corkscrew remains. This disadvantage is the length of the corkscrew, which is approximately 4.4 m. With such a length, the front bar of the corkscrew, in the state of a closed slag tap, blocks the path near the furnace and, in some cases, especially in the moments of accidents, is unpleasant and even a dangerous obstacle preventing personnel from moving quickly around the hearth of the blast furnace. This circumstance led the author to the idea of creating a completely new design of the corkscrew, endowed, besides the old ones, with a number of new improvements and simplifications. At the same time, its length in the closed tap-hole state does not exceed 1.3 m from the casing of the blast furnace.

In the proposed apparatus for communicating reciprocating motion in the parallel guide bars of the rod. in which scrap is strengthened, chains are fastened together with one end of the bar and the other with a sector wedged on a crank shaft connected to a piston rod swinging on the axles of the pneumatic cylinder.

FIG. 1 shows a side view of the apparatus; FIG. 2 is a front view of the apparatus; fchg 3-parts suspension; FIG. 4 is a top view of the rod bar.

The proposed design consists of a frame M, reinforced with a hinge on the bracket J9. On the frame J4 with the help of a swivel roller / 6 the chain three-strand sector / 5 is strengthened. Sector 75 is rigidly connected to roller J6. On roller 76, adjacent to sector 75, cranks 22 are hinged on pins, which are pivotally connected to rod 24 of a pneumatic cylinder 28. A 2S cylinder can swing on pins 29. On a roller 75 at some angle to cranks 22 a crank is fixed 2 /, end which is hingedly connected to the link 18, which is fitted with a groove on the Vapts 17. On the roller 76, besides cranks 27 and 22 and sector 7.5, is fixed a snag with counter load 25. In the lower part of the frame 14, guide parallels 36, which rest in two points from one

the sides in the hinges 57, on the other hand, are suspended from the adjustable spring 38. Such an elastic fastening is guided in direction; they are ensured by a tight locking of the notch in the case of a certain eccentric position of the plug relative to the tuyere. In the directions parallel parallels 36, the slider angles 77 can move freely, between which the pipe 9 is fastened (welded). The level crowbar 3 is completely freely inserted into the pipe 9 with large gaps and thanks to its rear curved end and doggie (folding) JO fixed in a certain position To the corners 7 / are attached the strips and 5 with hook-shaped grooves, into which the fork-shaped fork 2 with its plug 7 enters with its crossbars 6 and 7.

To the front end of the sector / 5 and to the rear end of the sliders / 7, two parallel segments of a simple welded chain 72 are fixed at their ends. Between chains / 2 passes a chain 73, which at one end is fixed at the rear end of sector 75, and the other at the front end of the corners //. Due to this arrangement of the chains, the angles 77 with the leveling crowbar 3 and the rod 2 are progressively moved when the sector 75 rotates around the axis of the roller 76. When the stem 24 operates from top to bottom, the sector 75 rotates clockwise, the rod 2 with the stopper / locks the tap. details take the position indicated by a simple dotted line and the sign A. When opening the notch, firstly the sector rotates counterclockwise, and the cork moves horizontally from the hole until the axis of the roller 75, hinge with Unity between the crank 22 and rod 24 and the pins 29 will not be on the same straight line. Thereafter, the entire system begins to rotate with the frame 14 around the hinge 1 and continues until it is rotated by 90 °, after which all the parts occupy the position shown by the axial dotted line and C signs. The transverse roller 35 drops into automatic the hook 37 and then the air from the cylinder can be released, and the whole system will remain hanging on the hook 37, fixing

by an emphasis 27, until the end of the release of the slag, after which the hook 37 is released with the help of a pull for a special cord, the entire movement of the mechanism occurs in the reverse order and the tap is closed. In the case when the slag does not go after removal of the plug from the tap hole due to the formation of nastily, it is necessary to pierce the nastila with a leveling crowbar. This operation is carried out mechanically, without the direct participation of the person, as follows. At some distance from the slag notch, perpendicular to the slag chute, a monorail suspended route 40 (I-beam) was strengthened, along which the trolley 47 can move on four runners 42. On the trolley there are three downstairs brackets a, b, with supports for shaft 43 and pins 44; between the supports a, b, to the axle 44 n, to the shaft 43, levers 45 are attached, connected to each other by a rigidly transverse bracket 46. A rocker arm 47 is mounted on the rear end of the shaft 43 with taps 48, with which the worker away from the tap hole can rotate the shaft 43 together with the levers 45, which, capturing with their curved left ends for the cross-pieces 5 and 7 of the locking rod 2, remove the last of the hook-like grooves 4 and 5, and the special shape of the groove 4 ensures free exit of the stopper, mine the end of the crowbar 3. Bar 2 levers 45 rises up d about until the angle of inclination of the levers becomes greater than the angle of friction of steel against steel, after which the rod slides along the levers 45 to their opposite ends and remains in that position during the entire drilling process, which is performed by the same movements as closing the tap hole, with the difference that now the crowbar 3, freed from the double rod surrounding it earlier, freely enters the hole of the tap hole, pushing inside the furnace by mm and punching nastily, after that the whole mechanism rises to its extreme the upper position C. The levers 45 turn, the bar with the stopper slides to the left and falls into the slots and 5 into its original place. When the whole system is lowered down, the cams 8, hinged on the corners, rotate under their own weight and, meeting the stop On, lock the crossbar 7 in the groove 5, so that the rod 2 with a stopper / cannot get out of the slots 4 to 5 1 l locks slag hole.

The mechanism provides for not only the easy replacement of the crowbar 3 with a new one, which is easily done with a closed tapping hole by folding the dog Yu and pulling the crowbar out of the pipe 9, but also provides an easy, fast and safe replacement of the rod 2 with the stopper 7 with a new one. This operation is, of course, carried out with an open tap at the time of slag production. With the help of the above described trolley 41 and levers 45, the old bar is removed from the corkscrew and slips onto the right end of the levers 45. Then the carriage 41 is moved aside to a safe place, where the burnt barbell is removed from the levers, and a new one is hung in its place, after which the cart until refusal (stop) to the corkscrew, and a new rod with a cork is put in its place in the manner already described. Due to the sufficient length of the trolley and the distance from the handle 48 to the levers 45, the worker never has to be directly at the entrance, and when installing the air distributor in a safe place, all control of the corkscrew movement is done from the side, which ensures maximum safety for servicing the slag tap. The compactness of this corkscrew makes it easy to work on cleaning the chol from the frozen slag and does not block the path around the blast furnace. During the work on changing the slag tuyere and embrasure, the entire corkscrew construction goes up, leaving enough free space for work.

The subject matter of the invention.

Claims (4)

1.ftnnapaT for clogging and shugging of the slag tap of the blast furnace using a removable locking rod located in the wreck, characterized in that to communicate a reciprocating movement using chains 12 sliding in parallel 36 to the sliders between which pipe 9 fixed with it is a replaceable crowbar 3, serves as sector 15 with three chains for chains, whose shaft is fixed in the swing frame 14, and cranks 22 are wedged on it, connected to the rod 28 of the pneumatic cylinder 28, and the crank 2 / connected to the link 18 minutes on a stationary platen / 7, which is fastened near the abutment 20. 2. The form of the apparatus according to claim 1, wherein the guide parallels 36 are fixed in the frame 14 by means of hinges 37 and a bracket with a spring 38. 3. The form of the apparatus according to paragraphs. 1 and 2, characterized in that the forked removable rod 2 carrying the plug 1 is mounted with crossbars 6 and 7 in the hook-shaped grooves 4, 5 of the strips attached to the sliders 7 /, and for locking it in these grooves in horizontal position serves swinging dog 8 and stop 77a. 4. In the apparatus according to PP. 1--3 use, for removing rod 2 after turning it to a vertical position, levers 45 supporting it for crossmember 7 and connected by a brace 46 mounted pivotally with roller 43 rigidly fastened with it in suspensions a, b l from trolley 41 , at the end of which roller 43 the rocker 47 is jammed with tami 48.