SU889173A1 - Apparatus for cooling moving rolled stock - Google Patents

Description

(.54) DEVICE FOR COOLING MOVING RENT

one

The invention relates to rolling production and can be used to accelerate the cooling of products after rolling, as well as to accelerate the roll in the rolling process.

Devices are known for transporting and cooling rolled products, including. transporting rollers, inter roller plates, devices for the upper and lower refrigerant supply and openings for supplying refrigerant through the plates J.

A disadvantage of the known devices is that special openings for supplying coolant jets to the bottom surface of the car are made in the plates of the roll tables. Owing to the sticking of rolled metal in the holes, there is a danger that the strip will be wiped when moving along the roller table. The presence of windows in the plates reduces the surface of the cooled stock and limits the number of effective nozzles.

Closest to the present invention, there is a device for cooling a rolling stock, including an advanced collector with water nozzles, mounted between the rollers of the outgoing roller table inside the collection chamber, on which the cover with holes 2 is installed.

The disadvantage of this device is that the placement of the collectors for supplying a cooler between the rollers of the live rolls requires making holes in the plates for supplying jets of cooler to the rolling surface, which leads to delays of the strip by role 15 Ganges. This reduces the cooling rate and increases its unevenness. This device does not allow to increase the rolling rate, and also contributes to the unstable position

20 lanes on the roller table.

Claims (1)

The purpose of the invention is to increase the reliability of the device for supplying a cooler, increasing the cooled surface and its uniform distribution over the entire surface of the strip, improving the removal of the vapor produced by increasing the area of the suction surface. The delivered pellet is achieved by the fact that, in a device containing a collector with water nozzles, mounted between the rollers of the discharge roller table inside the accumulation chamber, on which the roof with openings is installed, the cover is made in the form of a guide grid, the rod of which is angled 20 -50 ° to the longitudinal axis of rolling. Such an arrangement of the bars leads to a uniform cooling of the metal and provides the possibility of rolling both the section and the sheet metal, contributes to an improved suction of air and steam from the lower part of the roll, increases the stability of the roll on the roller table. The angle of the bars of the lattice of less than 20 ° leads to the appearance of zones of non-cooling metal, and an angle of more than 50 ° leads to striping of the strip. FIG. 1 is a schematic diagram of the proposed device; in fig. 2 shows section A-A in FIG. 1, in FIG. 3 - lattice, general view. The device contains rollers of roller table 1, chamber 2, inside of which is placed collector 3 with water nozzles 4, guiding grate 5 through which a cooler is fed to the strip and exhausts air and steam. The cavity of the chamber through the nozzles 6 of the suction pipe 7 through the valve 8 is connected to the fan 9. The device operates as follows. When the strip is moving along the rollers of the roller table 1, water is simultaneously supplied from the collector 3 and the refrigerant enters the roll through the guide grate 5. At the same time, the fan 9 is turned on, which in the zone above the chamber 2 under the grate 5 forms a vacuum, the strip, the passage under the guide grate 5, experiences different pressure on the lower and upper surfaces. The pressure on top of the Bbmie strip is lower than that of the m, due to the created differential pressure, the front end is pressed against the guide grid and the rollers of the roller table. Form. 4 when cooling steam through the guide grate 5, chamber 2, system of nozzles 6 and suction pipe 7 with valve 8 is removed by fan 9. Discharge control is carried out with the help of valve 8. This device ensures reliable fit of the front end of the strip and its when moving on rollers of the roller table itself, due to which its take-off and bend to the front end strip are excluded, which can cause accidents at the mill. The use of a guide grate allows to increase the cooling area of the metal by placing an additional amount of coolant nozzles and to improve the removal of the resulting vapor by increasing the suction surface. The use of a lattice with rods, the slope of which 20-50 ° allows uniform cooling of its entire surface and prevents the strip from drilling. The proposed device expands the possibilities of increasing the rolling speed of thin strips and other types of rolled products. The steam removed from the floor can be used for industrial and domestic needs. The proposed device used for cooling two single-grade 10XSND steel at mill 585 of Konstantinovsky Metallurgical Plant named after Frunze allows to improve the mechanical characteristics of the metal produced by the workshop and to apply it to bridge structures at low temperatures, which leads to a decrease in their weight. Apparatus of the invention for cooling a rolling stock including a water nozzle collector installed between the rollers of the discharge roller table inside the accumulation chamber on which the lid with holes is installed, characterized in that in order to increase the intensity and uniformity of cooling the rolled product by increasing the cooled section the lower surface of the strip, the crunch chamber of the accumulation chamber, is made in the form of a guide grid, the rod of which is located