SU778851A1 - Apparatus for cooling hot rolled strips - Google Patents

Description

(54) DEVICE FOR. COOLING HOT TEMPLATES

one

The device relates to metallurgy. rot, in particular for rolling mill production, and can be used, for example, in workshops with broadband hot rolling mills.5

A device for cooling hot rolled strips behind a rolling mill is known, which contains supply pipelines and headers with nozzles til.

For the purpose of uniform cooling of 10 rolled products, the total area of the nozzles is 0.25-0.30 in the cross section area of the collector. If this ratio is not fulfilled, then with one-way supply of the cooler to the collector-15, the flow through the holes (nozzles) g located at the end of the collector is greater than that through the nozzles located at the beginning of the collector. It has a potential head that determines the flow rate through the nozzles.

When the mill is reorganized from one strip size to another, the number of included sections changes, for example, in the direction of decreasing the number of included sections of the device, i.e. disconnecting part of the sections, in the collectors. disconnected sections, water is preserved which, when rolled to the next 30%

the size of the strips boils, deposited on the surface of the salt collector leads to clogging of the collector, reducing the diameter of the nozzles. This leads to an uneven outflow of the cooling chamber, uneven cooling of the strip across the width and deterioration of the mechanical properties of the rolled products. The above area ratio is violated.

Objective 13 is to ensure the stable operation of the collector for a long time by preventing boiling of the cooler in the collector.

The goal is achieved by the fact that, in a cooling device for strips behind a rolling mill containing inlet pipelines and headers with nozzles, the headers are provided with covers hinged to rotate from horizontal to vertical, with the covers longer than the maximum width of the cooled metal strips and Additional areas have been made at their edges extending beyond the cooled strips.

FIG. 1 shows the device, a general view; in fig. 2 - section

A-A in FIG. one; in fig. 3 - cover, type B.

The device consists of the collector 1 with nozzles evenly distributed along the axis, the cover 2 of the working part of the collector, which is fixed on the collector using detachable rings 3, spring 4 return.

In the initial position, the cover is horizontal. When supplying a cooler in the collector of this section, the cover 2 under the action of the flow of the cooler rises, providing cooling of the strip, when the supply of the cooler to the section is turned off, the cover returns to its original position. The preservation of the continuity of the jet in the section of the collector corresponding to the width of the strip is achieved by the special shape of the cover. The length of the collector and its cover more than the maximum width of the strip, rolled on the mill, by 150-200 mm. Along the edges of the lid, additional pads 5 are made; as a result, extreme jets that do not participate in the cooling of the strip keep the lid in position

778851

ensuring the continuity of the jet in the cooling section. When the jet is disconnected, the cap returns to its original position with a return spring.

Claims (1)

1. USSR author's certificate No. 529231, cl. Century 21 B 45/02, 1975.