SU1072995A1 - Wicket taper refractory gate - Google Patents

Abstract

SWIVEL CONE REFRACTORY PLUG, containing an exhaust manifold. A fixed block and a rotary block with locking rings located in it, mounted in the lateral lower part of the bucket wall, which in order to improve operational reliability, in the rotary block a calibration channel is made in the upper part of the fixed block has a tapered hole with a base diameter and a height equal to 2.5-3.0 and 0.4-0.5 diameters of the calibration channel of the rotary block, respectively, and in its lower part there is an oval outlet A hole with a width, length and height, ravish1I, respectively, the diameter of the calibration channel, 2.5-3.0 and 0.5 of the diameter of this channel, while the width of the locking rings of the rotary unit is 0,, 6 of the diameter of the calibration channel (Leading channel, and the collector channel in the upper part coincides with the oval outlet of the fixed block and in the lower part at a distance of 1.0-1.2 of the diameter of the calibrating channel goes from the oval to the calibrating hole.

Description

The invention relates to metallurgy and foundry, in particular, to the dosing of liquid metal, the filling of molds, molds, crystallizers and other metal receivers. Known shutters containing a rod, refractories located on the rod, the mechanism for moving the stop G1. However, these closures are unreliable in operation, are disposable closures, and constitute a significant consumption of refractories. Known gate valves f2 and Cz, which are mounted outside the bucket, as a rule, from the bottom. The inlet channel of the slide gates has a significant length to the flat surface of the locking movable element, therefore the metal partially crystallizes in this channel, which reduces the reliability of operation, requires additional measures to prevent metal from entering the channel, for example, filling the channel with powdered graphite. The flat shape of the sliding surfaces necessitates the application of considerable efforts to eliminate the gaps between the planes of the movable and fixed blocks of the shutter. Accordingly, friction between the blocks and forces for their retraction is increased. This increases the complexity of the drive, the dimensions of the shutter, fire hazard, mechanical abrasion and unreliability of the operation of blocks of special refractories such as fused periclase with complex machining (diamond grinding, etc.). The device containing the discharge ring is the closest to the proposed technical essence. the lecturer, the fixed block and the swivel block placed in it with locking rings mounted in the side lower part of the bucket wall 4. These design features allow to eliminate the long The input channel and the associated drawbacks of the flat slide gate operation. The disadvantage of this device is that the cylindrical surface of the movable block inserted from the side with a horizontal axis of rotation does not provide for self-clearance of the gap that occurs when the thermal elements of the system are not equal. , which can lead to the release of the metal or the seizure of the rolling block by metal frozen in these gaps. The purpose of the invention is to increase the operational reliability of operation. The goal is achieved by those. that in the rotary cone refractory gate containing the exhaust manifold, the fixed block and the rotary block placed in it with locking rings, mounted in the lateral lower part of the bucket wall, the calibrating channel is made in the rotary block, in the upper part of the fixed block there is a conical hole with the base diameter and a height equal to, respectively, 2.5-3.0 and 0.4-0.5 diameters of the calibration channel of the rotary unit, and in its lower part an oval outlet opening with a width, length and height equal to, respectively, dia the calibrating channel is 2.5-3.0 and 0.5 of the diameter of this calibrating channel, and the width of the locking rings of the rotary unit is 0.4-0.6 of the diameter of the calibrating canal. The collector channel in the upper part coincides with the oval outlet of the stationary block and in the lower part at a distance of 1.0-1.2 of the diameter of the calibrating channel passes from the oval to the calibrating hole. FIG. 1 shows a shutter longitudinal section; in fig. 2 - section A-A. in fig. 1. Metal 1 is in a container with lining 2 —and the bottom inside the casing 3. The refractory seal 4 holds the fixed shutter block 5 in the recess of the lining 2. Inside the block 5 there is a conical socket with a horizontal axis of symmetry. In this nest there is a front conic part of the movable block b, the back part of which is narrowed and has a tail, for example, in the form of a polyhedron. The conical front part of the movable block b has a through calibration channel 7 with a diameter d. The surface of the cone at the front and rear of the channel form the front 8 and rear 9 stop. rings tightly rubbed to the surface of the nest in the fixed block 5. The fixed block 5, made like block 6, of high-quality refractory carbon-containing material, is adjoined by the lower part — the collector 10 of block 5. The inlet 11 of block 5 has a conical shape and length 0 , 4-0.5 diameters, and the outlet 12 has the shape of an oval, the width of which (Fig. 1) coincides with the diameter of the channel, and the length in cross section is 2.53, 0 of the diameter of the channel (Fig. 2). The upper part 13 of the channel of the collector 10, which in the lower part at a distance of 1.0-1.2 of the diameter of the calibrating channel moves from the oval to the calibrating hole, adjoins the hole 12 from the bottom. To the tail of the block 6 is mechanically connected to the actuator 14 turn. The shutter has preparatory, working, final and emergency modes of operation. When preparing the liner 2 into the nest through the hole in the bucket 3, the bucket is inserted (block 5 together with block 6 is in the Open position. Figures 1 and 2. A collector 10 is docked from below. Gaps between block 5 and lining 2 are blocked by a refractory mass that creates a seal 4. After the bucket is dried by the actuator 14, the block 6 is turned so that the upper part of the channel 7 in block 6 coincides with the inlet of block 5. In this position, the container Chkovsh) fills with metal 1 and is fed to the casting site. The operating mode consists in turning the drive 14, block 6 in block 5, to achieve the technically necessary filling rate of the metal reservoir due to the different degrees of coincidence of the openings 11 of the inlet and channel 7 in block 6. The locking rings 8 and 9 do not expel the metal along the gate axis . From the oval hole 12 and the site of the hole 13 of the collector 10, the jet is arranged in a circle; which reduces the spatter and the loss of metal itself. In the final mode, the block 6 is rotated smoothly so that the metal does not flow from the hole 11 into the channel 7, but due to the extension of the oval it goes down, which prevents the metal from being locked inside the channel 7 and the formation here is pro-side. In this connection, during operation, instantaneous turns of the block 6 with a jerk are undesirable. This may lead to the release of the shutter stro. Spent blocks are removed from the liner socket and new ones are inserted through the same hole in the vessel 3 of the container. The emergency situation is associated with the rare freezing of metal in the opening 11. In this case, the block. 6 rotates into the Open position, a rod is introduced into the channel from the bottom and the cork is pushed into the aperture 11 by means of a bucket, opening access to the methycle. The same result is obtained using oxygen to burn through the plug. In all other cases, the actions in an emergency situation are similar to those in the case of stop or slide casting. The results of studying the geometric parameters of the shutter blocks are shown in the table. 1. The expected economic efficiency is .350-1050 thousand rubles. in year.

d basic size

I

0.2; 0.33 0.4-0, bo1 0.7 and 0.8 d

1.0, 1.5 and 2.0 o1 2.5 and 3.0 o1 3.5 and 4.0d

The diameter of the cross section of 2.0 and 2.3 d of the cross section of the cone of the rolling block

2,5-a, 0 o1

By technology

There are rare cases of metal to the ends

Satisfactory but

Worsening of conditions for grinding blocks to each other

Formation of traffic jams in the channel Full, discharge from the channel.

f

Deterioration of the closure conditions, as the length of the channel mismatch zone in the movable and the aperture in the fixed block is reduced

(with a chuck, minor zones are locked

Satisfactorily

3.5-3.8, 0.3 and 0.4d

input channel

0.5 d

0.6 and 0.7d

0.3 and 0.4d

0.5d

0.6 and 0.8d, etc.

The height of the transition section from the oval to the circle in the manifold

Table continuation

Unacceptable shutter dimensions

The weakening of the mechanical strength of the block

Satisfactorily

The case of crystallization of the metal in the input channel

The weakening of the mechanical strength of the block

Satisfactorily

Cases of metal crystallization in the input channel

Non-compact jet satisfies non-compact jet

Claims (1)

A ROTARY CONE FIRE-RESISTANT SHUTTER, containing an exhaust manifold, a fixed block and a rotary block with locking rings mounted in it, installed in the lateral lower part of the bucket wall, characterized in that, in order to increase operational reliability, a calibrating channel is made in the rotary block, in the upper part of the fixed block a conical hole is made with a diameter of the base and a height equal to 2.5-3.0 and 0.4-0.5, respectively, of the diameter of the calibrating channel of the rotary block, and in its lower part there is an oval outlet growth with a width, length and height equal respectively to the diameter of the calibrating channel, 2.5-3.0 and 0.5 of the diameter of this channel, while the width of the locking rings of the swivel ° block is 0.4-0.6 of the diameter of the calibrating channel, moreover, the collector channel in the upper part coincides with the oval outlet of the fixed unit and in the lower part at a distance of 1.0-1.2 diameter of the calibrating channel passes from the oval to the calibrating hole.