Cooling a roll of a roll stand

Patent metadata

Field	Value
Publication number	US-11338339-B2
Application number	US-201716340410-A
Country	US
Kind code	B2
Filing date	Oct 12, 2017
Priority date	Oct 17, 2016
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A cooling device (7) for cooling a roll (5) of a roll stand (1). The cooling device (7) includes a chilled beam (13) for receiving and discharging a coolant. The chilled beam (13) has multiple full jet nozzles (21) disposed on a discharge side (19) of the chilled beam (13), the side facing the roll (5) and extending parallel to a roll axis (17) of the roll (5). Through each of the full-jet nozzles, a jet of coolant having a nearly constant jet diameter can be sprayed from the chilled beam (13) towards the roll (5) in a discharge direction (23).

First claim

The invention claimed is:

1. A cooling device for cooling a roll of a roll stand, the cooling device comprising:
a cooling bar configured for receiving and discharging a coolant; and
the cooling bar having a coolant discharge side, a plurality of full jet nozzles arranged on the discharge side of the cooling bar, the discharge side facing the roll to be cooled and extending parallel to a roll axis of the roll, the bar is configured so that through each full jet nozzle, a coolant jet of coolant with a constant jet diameter can be discharged from the cooling bar toward the roll in a discharge direction, wherein the full jet nozzles are arranged in a plurality of parallel nozzle rows, wherein adjacent full jet nozzles have a nozzle spacing along a direction parallel to the roll axis and the spacing varies symmetrically with respect to a center line of the discharge side of the cooling bar along the direction of the roll axis, wherein the nozzles are arranged symmetrically with respect to an axis along the direction of the roll axis, and wherein the nozzle spacing is smallest in a central region of the discharge side of the cooling bar.

2. The cooling device as claimed in claim 1 , further comprising:
the cooling bar is divided into at least two mutually separate coolant chambers for receiving the coolant, wherein each coolant chamber corresponds to a subregion of the discharge side of the cooling bar and a group of jet nozzles from the plurality of full jet nozzles is arranged in each subregion wherein, each nozzle is configured such that a coolant jet can be discharged from each coolant chamber toward the roll through each nozzle.

3. The cooling device as claimed in claim 2 , further comprising a first one of the coolant chambers corresponds to a first one of the subregions of the discharge side of the cooling bar, the first subregion is mirror-symmetrical with respect to the center line of the discharge side of the cooling bar, which is perpendicular to the roll axis.

4. The cooling device as claimed in claim 2 , wherein an extent of the first subregion parallel to the center line of the discharge side varies along the direction of the roll axis and is at a maximum along the center line.

5. The cooling device as claimed in claim 2 , further comprising the first subregion has the shape of a polygon.

6. The cooling device as claimed in claim 2 , further comprising a coolant feed line, connected to each coolant chamber and configured for feeding the coolant into the coolant chamber, wherein the coolant feed line opens into the coolant chamber in a direction substantially perpendicular to the discharge direction of the coolant.

7. The cooling device as claimed in claim 2 , further comprising a control valve and/or a pump configured for controlling the coolant quantities fed into the coolant chambers, wherein the controlling is independent by the control valve and/or the pump.

8. The cooling device as claimed in claim 2 , further comprising an automation system for controlling respective coolant quantities fed into the respective coolant chambers.

9. A roll stand comprising a roll and two of the cooling devices of claim 2 , wherein the two cooling devices are arranged on opposite sides of the roll which the two devices cool.

10. The cooling device as claimed in claim 1 , further comprising the nozzle spacing is between 25 mm and about 50 mm.

11. The cooling device as claimed in claim 1 , wherein each full jet nozzle is releasably secured in a respective nozzle aperture therefore.

12. The cooling device as claimed in claim 1 further comprising a wiper for wiping coolant from the roll, wherein one or both of the wiper and the cooling bar are configured to be pivoted separately or jointly for positions for the wiping and halting the wiping.

13. The cooling device as claimed in claim 1 , further comprising a respective plurality of rows of nozzles, the nozzle in each of the rows are spaced apart along a direction parallel to the roll axis and the nozzles in at least two adjacent rows of the nozzles are offset from a respective nozzle in an adjacent row, the offset selected such that coolant moving from one nozzle down the discharge side passes between two of the nozzles in the adjacent row of nozzles.

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Opitz Erich
• Pichler Lukas
• Seilinger Alois

Classifications

• B21B2027/103

  cooling externally · CPC title

• B21B27/10 Primary

  externally · CPC title