SU926030A2 - Apparatus for cooling rolled stock - Google Patents

Description

(W) DEVICE FOR COOLING THE RENT

one

The invention relates to a device for heat treatment of prol. kata, in particular sheets, plates, strips, tapes, and can be used for thermal strengthening with rolling heating.

According to the main author. St. No. 386E97, a device is known, a VB1 FILLED in the form of two non-axial pipes mounted one into the other, out of which are external, plugged at the ends and provided with a tapered nozzle extending into the slotted nozzle, and the internal pipe has opposing leads and a longitudinal slot directed into The opposite side of the nozzle is opposite to the nozzle, and petal-shaped distributors are installed in the cavity of the inner pipe, symmetrically to the longitudinal slit, the tops of which are located in the central vertical plane of the ticking plane of the slit 1.

The disadvantage of the design of the known device is that the flow of the cooler consists of large and

non-uniform particle size. Low dispersion of the cooler leads to slow cooling of the car, which is undesirable.

The aim of the invention is to improve the spray quality of the coolant stream.

This goal is achieved by the fact that the device is equipped with tapering nozzles placed on both sides, along its length, additional tapering nozzles, plugged at the ends and equipped with nozzles for supplying air, the cavity of each additional nozzle being formed by a half-pipe, which transforms into a longitudinal shelf and a wall nozzles in which holes are made.

FIG. 1 schematically shows the proposed device, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2

Claims (3)

The device for cooling the car consists of two non-coaxial pipes 1 and 2 built into one another, of which pipe 2 is plugged at the ends, and along the length is provided with a tapered nozzle 3I in which nozzle holes are made at an angle to the vertical axis inclined towards the jet outlet. The tapering nozzle 3 passes into the slotted nozzle 5. The inner pipe 1 is made together with the nozzles 6 and has a longitudinal slot 7 directed in the direction opposite to the nozzle 5. In the cavity of the inner pipe 1, two lobe distributors 8c are installed symmetrically with respect to the longitudinal slot rigidity 9. For supplying a sprayer, for example, compressed air in the device at the side of the main tapering nozzle 3, along its length. Additional tapering nozzles are installed, each of which is mounted with a semi-pipe 10 with a nozzle 11, a longitudinal shelf 12 and a wall of the nozzle 3. Additional tapering nozzles pass into slotted nozzles 13. The device works as follows. The coolant (water) through the pipes 6 flows into the inner pipe 1, in which the two flows of the cooler meet. Installed in the cavity of the pipe 1 and symmetrically located relative to the longitudinal slit 7 lobe distributors 8 with stiffeners 9 ensure uniform filling of the internal volume of the pipe with a cooler 2. Further averaging of the flow of the cooler along the width and length occurs in the main tapering nozzle. 3. The atomizer through the nozzles 11 enters the additional tapering nozzles, where it is divided into two streams. One of them passes through the nozzle holes k, made in the walls of the main tapering nozzle 3, is encountered with jets of water and crushes them to a fine state. In the form of a water-air mixture, water and air flow out of the device through the slit 9 04 nozzle 5- Another spray stream passes through an additional tapering nozzle, having flowed into the surrounding space through the external slit nozzle 13. Water-air jets flowing out of the main nozzle 5. meet with passing intersecting air jets flowing from the external slit nozzles 13. As a result of the mutual impact of air and water-air jets, additional crushing of liquid droplets occurs, and, as a result, clarity of water droplets in a water plume. The intersection of air jets emanating from the nozzles 13 makes it possible to obtain a sufficiently open air-water torch that allows covering a considerable surface area of the cooled steel. Thus, a two-stage sputtering is provided in the device: internal (in the main tapering nozzle 3) and external (at the nozzle exit 5 and 13), which improves the quality of the spray pattern of the coolant flow. The use of the proposed device provides an increase in the strength properties of rolled products of about a 5. Formula of the invention A device for cooling rolled products according to ed. se If 386997, characterized in that, in order to improve the spray quality of the coolant flow, it is provided with additional tapered nozzles placed on both sides along its length, additional tapered nozzles plugged at the ends and equipped with air connections, and the cavity of each additional nozzle is formed by a half pipe. transition into the longitudinal shelf, and the wall of the tapered nozzle in which the holes are made. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 386997, class, C 21 O 1/02, 13.03.71. .