RU1793995C - Self-centering crystallizer - Google Patents

Abstract

The self-centering mold contains a body, a copper sleeve, pendants and a swinging frame, and has a top part. the body is a discharge pipe, and in the lower part on the opposite side is a water pipe, a swinging frame, a hollow space for supplying and discharging water, one beam of which is located at the bottom of the mold and is connected by a flexible element to the supply pipe. The swinging frame is supported by a screw with a ball end on a concave of a larger radius than that of the screw, the ball surface of the bracket of the support frame, the contacting surfaces in the suspensions are made end-face, and the mold flange on the water side has a guide with a beveled surface, between which the seal and the sleeve have a seal . 4 il .. -. . .

Description

The invention relates to ferrous metallurgy, and more particularly to continuous casting of metal. / - :: V.; ;.

.Well-known self-centering molds are known on continuous casting machines (MNEs). In all molds, both stationary and self-centering, only the lower part wears out; copper walls. In stationary prefabricated molds, the lower part of the copper walls is so worn that the walls are restored only by rebuilding. In self-centering crystallizers, the abrasion of the walls in the lower part is insignificant, therefore, to ensure uniform abrasion of the entire inner surface of the sleeve cavity, approximately every 50 ... 60 melts, the mold is disassembled, the sleeve is removed from the body and reinserted, but the sleeve is turned upside down and again collect the mold. Dismantling, assembly of the crystallizer, its alignment - expensive operations.;.

The prototype is a device for continuous casting of metal containing a cooled mold with trunnions and a centering system in the form of an intermediate hollow swing frame and ball pendants, the swing frame is supported by two bearings on the hollow frame of the swing mechanism. ::. .,: .... ,,. :.

Water for cooling from the frame of the swing mechanism through the hollow swing frame and the bellows system is supplied to the lower collector of the mold, cools the copper tubes and is freely discharged through the nozzles of the upper collector into two receiving funnels, from which water flows into the receiving workshop header.

However, the sleeve self-centering-with mold with a free discharge

"W

water (prototype) it is not possible to use on existing varietal BNL 3, because almost all of them operate in a closed cooling cycle and many workshop sewage collectors are pressurized and freely drained

water is impossible. ; V ;.

On all shell molds, including the prototype, the least: a reliable assembly is the seal of the gap between the shell and the housing, and water breakthrough often causes the pouring process to stop. In addition, the horizontal components of the heavy weight forces of the molded housings, as well as the significant friction drills of sliding in joints and suspensions, reduce the ability of the mold to self-center and increase the wear of copper. / ...

The purpose of the invention is to increase the stability and reliability of the mold due to its increased sensitivity to self-centering, the additional introduction of an internal seal, and lower operating costs due to the possibility of turning the mold sleeve with and without the housing. showdowns. .. .

. To achieve this goal, a self-centering crystallizer is proposed, comprising a copper sleeve, a welded lightweight body with a discharge on its upper part, and on the lower and opposite sides - inlet pipes and two trunnions, one on opposite sides in the center of the body height; two rockers for hanging the housing, having openings of a slightly larger diameter of the trunnions of the housing; a swinging water-cooled spatial frame, two end and one lateral water supply beams of which are located at the level of the upper outlet pipe, the lateral water supply beam being located on the opposite side of the casing from the upper outlet pipe, i.e. above the lower supply pipe of the housing, and the other lateral drainage beam is lowered to the level of the lower supply pipe, but on the opposite side of the housing and is located under the upper discharge pipe; two do not prevent the housing from displacing in the horizontal plane and its inclination along the axis of the trunnion pins of flexible hollow elements, which connect the lower supply pipe to the upper lateral water supply and the upper discharge pipe to the lower lateral discharge beam, respectively; swinging from the frame by means of screws with spherical ends located on the end beams is supported on the spherical surfaces of the brackets of the support frame made concave of a larger radius than the screws; suspensions, trunnion trunnions and suspensions are in contact with each other on end surfaces and thereby sliding friction is replaced by rolling friction, which reduces forces

resistance to self-centering; In the case of the mold, on the water side, in the upper part below, and in the lower part, above the flanges, an internal seal is installed, consisting of a beveled guide and a flexible cord.

Figure 1 shows a General view of the mold; figure 2 is a cross section aa; in Fig.Z - node internal

liner seals in the mold body; in Fig, 4 - mounting the suspension on the axis. The self-centering mold has a welded lightweight housing 1, which is supported by two trunnions on two rockers 2, the ends of which are suspended on hinged, with torus contacting surfaces, pendants 3, mounted on the brackets of the swing frame 4, which is installed by two supporting screws 5

with spherical ends on the concave surfaces of the brackets. Bellows b (flexible hollow elements) are designed for supplying and discharging water to the swinging frame, and the front and rear elongated bellows

7 (flexible elongated hollow elements) for the inlet and outlet of water; the mold is swinging from the frame. All this is mounted on a support frame 8, in which inlet and outlet conduits are made.

The upper water outlet 9 and the lower water supply 10 of the body nozzle are connected by elongated bellows 7, respectively, to the lower water discharge side beam 11 and to the upper side water supply beam 12 of the swing frame. An oil seal 16 is pressed between the copper sleeve 13 and the mold flange 14 by the flange 15. The proposed inner seal 17 is initially put on the top of the sleeve with some tension, and when the mold is closed with the flange 14 (when it is lowered and bolted to the body) this is an internal seal (cord ) but in conical

the gap between the guide 18 and the sleeve 13 and seals the mold, and the internal pressure of the water additionally seals the gap. Figure 4 shows the contact of the torus surfaces of the axis of the bracket 19 and the suspension 20.

The rotation of the sleeve together with the mold body relative to its center O (Fig. 2) is carried out as follows. The upper parts of the suspensions 3 (Fig. 1) are removed from the brackets of the swinging frame, the bolts of the upper flanges of the elongated bellows are unscrewed, and the mold body 1 is rotated together with the sleeve 13, the rocker arms 2 and the suspensions 3

relative to the center O (Fig. 2) by 180 ° and further, the upper parts of the suspensions are put on the brackets of the swinging frame and the flanges of the elongated bellows are bolted.

. In figure 1, arrows B and C show the inlet and outlet of water into the support frame; in Fig. 2, the arrows show the direction of water movement in the mold.

Claims (2)

Formula 1, A self-centering mold containing a sleeve, a housing, pendants, a support frame and a water-cooled swing frame supported on it, characterized in that, in order to increase durability, reliability and reduce operating costs by rotating the sleeve in the mold body without disassembling it and increasing its sensitivity to self-centering, it is equipped with rocker arms for hanging the housing, which is made welded with the outlet located at the top and at the bottom on the opposite side - supply and it has nozzles arranged at its center trunnion of the rocker body for suspending formed with openings whose diameter exceeds the diameter of the pins, with kachayuscha frame is hollow, its two end and one side vodopodvod conductive beams disposed at the discharging pipe housing, wherein the lateral water supply beam is located on the side of the housing opposite the outlet pipe and is connected to the supply pipe by a vertical flexible hollow element, the second side water discharge beam is located at the level of the supply pipe on the opposite side of the body and connected to the discharge pipe a vertical flexible hollow element, which is supported from the frame by the side beams by means of screws with spherical ends on the spherical surfaces of the bracket made concave of a larger radius new support frame, and the trunnion trunnions and pendants are in contact with each other on torus surfaces. 2. The mold according to claim 1. characterized in that, in the cavity of the mold body from the water side, a seal is made, made in the form of a guide with a bevel and a flexible cord.