SU872011A1 - Sprayer for cooling systems of units for continuous and semicontinuous casting of metals - Google Patents

Description

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The invention relates to ferrous and non-ferrous metallurgy, namely, to the casting of metals in a continuous semi-continuous manner.

The closest in technical essence to the present invention is a device for cooling casting, in which sputtering is performed by water or air mixture. The atomizer contains a mixing chamber, in the wall of which several nozzles with cylindrical channels are arranged, the axes of which are parallel to each other. Cylindrical channels have different diameters, which ensures a given non-uniformity of cooling.

However, this device does not provide the necessary uniformity of supply of water-air mixture over time. With slight fluctuations in the pressure of water or air, the composition of the cooler plume changes significantly, and the uniformity of its supply around the perimeter. There are no devices to ensure the stability of the flow of air and water flow to the openings of the sprayer.

The purpose of the invention is to increase the intensity of cooling of the ingot, as well as simplify production and operation, increase reliability in the case of small fluctuations in pressure of water and air in the pipeline, the possibility, if necessary, of cooling only with air or only with water.

The goal is achieved by the fact that the spray gun is provided with additional forto holes installed along the axis of the main nozzles, in each of which the axis of the diffuser is made to the axis of the confuser at an angle equal to the double angle of the cone of the diffuser.

15

The cone angle of the diffuser is 6–15, and the ratio of the diameter of the sphere of the confuser to the diameter of the smallest cross-section of the channel is 5–10.

20

In each nozzle, the channel is designed as a spherical confuser, which passes into the diffuser. In the nozzles, the axis of the diffuser is made to the axis of the confuser at an angle equal to double the angle

25 taper diffuser.

The ratio of the sphere diameter of the infuser of the smallest cross-section of the channel, 5-10, was taken from the condition of the highest concentration of the air jet, which contributes to the greatest spraying of the cooler, and the angle between the axis of the confuser and the diffuser, equal to the double angle of taper of the diffuser, is taken from the condition of the most uniform distribution chiller throughout the ingot secondary cooling zone.

FIG. 1 and 2 shows the sprayer, general view; in fig. 3 - section AA in FIG. 2; in fig. 4 is a section BB in FIG. 2 in FIG. 5 — node I in FIG. 3; in fig. 6 — node 1G in FIG. four .

The device comprises a housing 1 in which an air inlet 2 is connected, connected to an air chamber 3 in which a partition 4 is made. Air chamber 3 is connected to the water-air chamber 5 by channel 6. The air-water chamber 5 is connected via channel 7 to the main for filing oxen. The air / water mixture is discharged through the nozzles 8 and the nozzles 9 located along this line between them.

The proposed device works as follows.

Water and air are simultaneously supplied under pressure, respectively, through channels 2 and 7, water is displaced with air in chamber 5. The air-water mixture through channels of nozzles 8 and 9 is supplied to cooled ingot 12. A confuser 10 with a spherical surface the radius of curvature of which is 5-10 times the radius of the minimum cross section of the middle part of the channel. The confuser 10 is designed to concentrate and direct the jet of water-air mixture into the diffuser. The presence of a curved surface makes it possible to concentrate the jet and direct it into the diffuser 11. On the outer side of the i: - nozzle channel, a diffuser is formed, which forms an angle of 6-15 ° to the longitudinal axis. With the passage of the ingot

the torch of the cooler should be as wide as possible (while ensuring the uniformity of the cooler over the cross section of the torch). This can be achieved by removing the sprayer from the ingot. As a rule, secondary cooling envelopes are limited; therefore, it is undesirable to remove the nebulizer from the ingot. This will lead to an unjustified increase in the mass of the metal structure. It is advisable to make holes in the shape of a diffuser.

11 with a tapered part at the outlet of the water-air mixture, which allows for expansion of the cooler flare. Increasing the taper above 15 ° is impractical because this causes uneven distribution of the cooler over the torch cross section.

Claims (2)

1. Sprayer for cooling systems of continuous plants (and semi-continuous casting of metals), containing 5 1DI housing with an air chamber and a mixing chamber connected to the fluid supply system, in the wall of which nozzles with channels are installed along one line another confuser and diffuser, about t 0 l and h a and n and with the fact that, with In order to increase the intensity of the ingot cooling, it is equipped with additional nozzles installed along the axis of the main nozzles, each 5 of which the axis of the diffuser is made to the axis of the confuser at an angle equal to the double angle of cone of the diffuser. 2. Sprayer according to claim 1, wherein the cone angle of cone is equal, and the ratio of the diameter of the sphere of confuser to the diameter of the smallest section of the channel is 5-10. Sources of information taken into account in the examination 1. Austria patent number 327418, cl. 31 In 8/02, pub. 1966. Kpucma jnaaffifff l X X G; | L l V / V: - / i; .x.t ,. FIG. eleven ui.3