SU29000A1 - Device for continuous casting of metal - Google Patents

Description

The invention relates to a device for continuous casting of metal, in which liquid metal from a metal receiver is fed into a well formed by two endless ribbons composed of separate hinged joints, automatically closing and disconnecting half-molds, and then, after solidification, is calibrated and cut into pieces of required length .

In the proposed belt feeding device, four plates are provided, which are rotated around axes that periodically approach each other and are removed, and to tension the tapes of the curl, a vertical shaft with thread that is screwed into the nut that is connected to the fixed plate.

In FIG. 1 shows a front view of a device for continuous casting of a metal with a partial cut; FIG. 2 the same side with a partial cut; FIG. 3 is the same from above; FIG. 4th and 4th view of sliding spring hooks.

From the glass of the pouring ladle through a funnel, liquid steel flows in a steady stream into the vertical E {$ b | y well 46, made up of two endless ribbons 7 and 20. The ribbons consist of metal links-links 26 fastened on hinge pax 27

and are suspended on separate triangular plates 25 and 7. These plates are mounted on axis 45 in bearings 28 and are rotated by motor B and 4 by means of screws 2 and worm wheels 44. Below, the same tension plates 8 and 27. mounted on axle 42, located in bearings 22. When the mechanism is operating, the belts are tightly tightened between the upper and lower triangular plates. When the upper plates 25 and 7 rotate, the ribbon gains a progressive movement. In the upper part of the belt mechanism, they converge closely and form a vertical well, moving evenly downwardly with metal 6 frozen in it. At the bottom, the well again splits into two separate ribbons, which bend around the lower tensioning plates and again go Up to form a well. The solidified metal gradually flows from the decaying well in the form of hot strip 77, passes through the hole in the lower cast-iron plate 18 and enters continuous rolling using guide rollers 16. To avoid slipping of ribbons along the edges of triangular plates, ribbon 47 are formed in the ribbon links x, forming wide on the outside

AcoAbs, which do not include the edges of the supporting plates. The walls of the slab well should be permanently strongly tensioned between the protruding corners of the triangular plates. In order to achieve the density of the well, when these plates are rotated, a continuous approach and removal of their axes of rotation occurs, carried out by a straight-line movement of the upper 4 and lower 12 movable plates. These plates are attached to bolts 29 and 33

to the uprights 30 and 34, moving in dovetail guides in the shape of a dovetail 31 and 55, screwed to fixed cast-iron plates: the upper 32 and lower 75. Four electric motors 5, 9, 19 and 49 by transmission from worms 14 v. the crankshafts 43 are rotated to the worm wheels 10, the iatons // mounted on them are attached to the supporting movable plates by means of the hinge devices 13. Thus, when the motors rotate, the supporting mechanisms, the belts themselves, move closer to the horizontal planes, maintain uniform translational motion. All six motors 5, 5, 9, 19, 48, and 49 are synchronous, and synchronism can be accomplished by one of the known methods. When rotated by 60 ° triangular plates, one movement of the supporting pillars follows, as a result of which the number of teeth on the worm wheels 10 is three times less than on the worm wheels 44. In order for the ribbons to be permanently tensioned, the bottom stationary cast iron plate 18 is attached to the bolts 41 to the part 36 into which the vertical shaft 15 is screwed, which abuts against the hub 38. The vertical shaft is rotated from the electric motor 37 by means of a worm 39 and a worm gear 40. When the ribbons loosen, the shaft is rotated, screwed in in detail 56, and pulls down the entire lower mechanism. When rotating in the ebrat side, tension is weakened. Tension adjustment can be designed automatically. To achieve well tightness, the strip tiles have along the edges longitudinal 23 and transverse 24 protrusions that fit into the corresponding hollows of the adjacent plates. Longitudinal projections are made in chess

order, which eliminates the possibility of slipping the ribbons from one to another. On one of the ribbons at each link-tile in the middle, from both sides, on hinges 55, it is suspended by an automatic tightening spring hook. On the plates of the other tape, respectively, there are the same hinges, but without hooks. By the time the well was drawn up, the dowel hooks are freely hinged. When the well is lowered, the fixed stops 50 which are placed on the side, press on the tails of the spring hooks 57, while the nozzles of the latches 54, which are pressed into the hinge rollers, -. In the lower part of the well, during its disintegration, the nozzles of the hooks also fall down behind the supports, as a result of which the tapes automatically disengage. Thus, along the whole line of the well, both tapes are tightly pressed to each other. At the points of contact between the tiles, careful mechanical treatment is necessary, even grinding is desirable. For cooling, the well is watered when operating in thin streams of water. For starting up the mechanism, one pair of opposite tile units has on the inner side two shallow transverse grooves.

Before the production of the casting, after the preliminary trial start of the mechanism, it is stopped so that the described pair of tiles falls on the second from the top. A metal plate is inserted into the well in such a way that it is held in its grooves with its edges. The gaps between the tiles and the walls of the well are covered with refractory clay. At the beginning of casting, a small amount of metal is first poured; getting on a horizontal plate inserted into the grooves at the top of the well, the metal freezes; the mechanism is gradually put into operation and begins to be cast at a full funnel, at which the rotation speed of the mechanism is adjusted so that the metal level is constant. When the metal exits from the bottom, the support plate beats off, and the hot strip goes into continuous rolling consisting of only three or four stands, since the strip has a profile that is as close as possible to the required one. The continuously rolled metal is sawn on the move with special design circular saws.

At a useful well height of about five meters and other normal conditions, it will be possible to pour from 1.2 to 1.6 tann per minute. With cages of 100 tons and above, it is possible to pour from one bucket with two stoppers at the same time, for which one should place

two casting machines with common

rolls. When working with Bessemer well height is significantly less. In order to eliminate splashes during casting, the metal pouring from the funnel passes inside a vertical graphite tube, immersed 50 mm in the liquid metal in the well. The impact of the jet 9 on the surface of the liquid metal occurs inside the tube, which eliminates splashing.

The main advantage of the described design over all previous ones, according to the inventor, is the well formation method, due to which the liquid metal level can be kept at the very top with a length of tiles up to 500 mm, as well as the tightness of the well walls, its satisfactory cooling and the absence of splashes of metal .

Subject of the invention.

Claims (2)

1. A device for the continuous casting of metal, in which the liquid metal of their metal reservoir is fed into a well formed by two endless ribbons made up of separate hinge-connected, automatically closed and disconnecting half-form links, then further, after solidification, is calibrated and cut into pieces of the required length, Four triangular plates, 8, 21 and 25, driven by electric motors 3, 48 during rotation about axes 45, 42, which axes periodically approach and are removed by means of a crank transmission from motors 5, 9 , 19 and 49, and for tensioning the belts, by tightening the lower mechanism, a vertical shaft / 5 with rotation made from an electric motor 37 is screwed, which is screwed into the part 35, which plays the role of a nut, which is bolted to the fixed plate 18. 2. In the device according to claim 1, use for closing the links, when the spring hooks 57 are closed on the links of one of the tapes and, accordingly, on the links of the other of the tapes of the latches 54, for opening and closing of which are stops 50,