Aside spray method for cooling the steel strip after hot rolling, comprising the following steps: a) providing side spray devices (30, 30, 30) behind each of cooling sections after hot rolling (20, 20, 20), the side spray devices being staggered along the two sides of an run out roller table (10), each side spray device comprising at least two spray units, each spray unit comprising spray tubes (2, 2, 2) and nozzles on the tubes, the spray tubes being in parallel and vertically arranged along running direction of the steel strip, the covering ranges of adjacent nozzles are partially overlapped, and a total spray coverage of nozzles covers the width of the entire run out roller table; side spray water collecting devices (40, 40, 40) are provided on the other side of the run out roller table that is opposite to side spray devices, so that side spray water being collected by the water collecting devices; b) controlling the side spray devices in a mode of open-in-pairs, i.e., side spray devices on either side of the run out roller table must be started simultaneously. The side spray method can effectively purge the residual water on the surface of steel strip having different width specifications, improves the cooling uniformity, and reduces splashes as far as possible to avoid adverse effects on the environment and electrical equipment.

The present invention discloses an annular cooling device for large-scale cylindrical shell, which comprises a plurality of inner jet devices and outer jet devices; the inner jet devices are arranged inside the cylindrical shell along the inner periphery; the outer jet devices are arranged outside the cylindrical shell along the outer periphery; each inner jet device and each outer jet device are oppositely arranged; the inner jet devices are used for spraying cooling medium to the inner wall of the cylindrical shell; the outer jet devices are used for spraying the cooling medium to the outer wall of the cylindrical shell; and the spray ranges of each inner jet device and each outer jet device in the axial direction of the cylindrical shell are both greater than the length of the cylindrical shell.

A cooling device for cooling a material to be cooled, comprising an inlet for a cooling medium conducted into a first, upper chamber of the cooling device. First conduits are provided which conduct the cooling medium from the upper chamber into a second, lower chamber of the cooling device. The upper chamber is separated from the lower chamber by a wall. Second conduits are provided which conduct the cooling medium from the lower chamber to at least one outlet opening for cooling medium, via which the cooling medium is discharged onto the material to be cooled.

The invention relates to a method for cooling a metallic item (1) by discharging a cooling medium from a cooling bar (2) onto the item (1), wherein the cooling medium is discharged through a slot (3) in the cooling bar (2). According to the invention, in order to achieve improved cooling, during the cooling process the width (B) of the slot (3) in the conveying direction (F) of the item (1) or of the cooling bar (2) is altered in order to bring the cooling power of the cooling medium to a desired or predefined level by open-loop or closed-loop control. In addition, the invention relates to a cooling bar.

A cooling device with variable cooling rate for treating metal materials, in particular for cooling steel sheets in plate mills, hot strip mills or thermal treatment lines, by means of a spray nozzle cooling system. The cooling device consists of at least two cooling bars one of each two cooling bars being situated on the lower side and the other on the upper side transversely to the sheet travel direction of the sheet and centrally between two roller table rollers and includes a spray nozzle cooling system with which a plurality of full jet nozzles and a plurality of full cone nozzles are associated, the full jet nozzles being arranged symmetrically to the full cone nozzles. A method for operating the cooling device according to the disclosure

The present invention relates to an apparatus for tempering hot articles, in particular an apparatus for homogeneous, contactless tempering of primarily non-endless surfaces that are to be tempered; the tempering apparatus has at least one tempering blade or a tempering cylinder; the tempering blade or tempering cylinder is embodied as hollow and has a tempering blade nozzle edge or a plurality of tempering cylinders arranged in a row; in the nozzle edge at least one nozzle is provided, which is aimed at an article to be tempered; and at least seven tempering blades are arranged in such a way that the flow pattern on the surface to be tempered forms a honeycomb-like structure; and to a method therefor.

In a facility for cold rolling a metal strip in a circulating oil-feeding system by jetting a low concentration coolant, in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of the jetting position of the low concentration coolant to conduct rolling, the metal strip is cold rolled with the cold rolling facility provided with a control equipment for varying a jetting amount of the low concentration coolant in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a surface of a steel sheet at an inlet side of the work roll does not reach a jetting position of the high concentration coolant, whereby the rolling can be performed without losing a plate-out property even if the rolling rate is decreased.

During the rolling of a metallic flat rolling stock (1) in a roll stand (2), lubricating oil (5) is sprayed onto the rolling stock (1) and/or at least one roll (3,4) of the roll stand (2) by multiple spray nozzles (7) arranged beside one another. In each case, a mixing chamber (8) of a spray nozzle (7) is fed with a respective quantity of lubricating oil (5) via respective multiple oil inlet openings (9). The respective mixing chamber (8) is fed with compressed air (11) via respectively one air inlet opening (10). Compressed air (11) atomizes the lubricating oil (5) in the respective mixing chamber (8) to form an aerosol and, via respectively at least one nozzle outlet (12), is sprayed onto the rolling stock (1) and/or the at least one roll (3,4) of the roll stand (2).

Provided is a coolant spray module system for a heat treatment metal product, comprising: a first coolant spray module (1A), wherein the first coolant spray module (1A) comprises a first module housing (10), a first module cover (20), and a first nozzle (30), wherein the first nozzle (30) is fixed between the first module housing (10) and the first module cover (20) by first nozzle fixing blocks (13) and second nozzle fixing blocks (23), wherein the coolant spray module system sprays the coolant onto the heat treatment metal product to quench and clean the heat treatment metal product.

A piercing machine includes a plurality of skewed rolls, a plug, a mandrel bar and an outer surface cooling mechanism. The outer surface cooling mechanism is disposed around the mandrel bar at a position that is rearward of the plug, and with respect to an outer surface of a hollow shell advancing through a cooling zone which has a specific length in an axial direction of the mandrel bar and which is located rearward of the plug, as seen from an advancing direction of the hollow shell, the outer surface cooling mechanism ejects a cooling fluid toward an upper part of the outer surface, a lower part of the outer surface, a left part of the outer surface and a right part of the outer surface of the hollow shell to cool the hollow shell inside the cooling zone.