RU1831505C - Pipe for cooling of rolled material on water-cooled lines - Google Patents

Abstract

The essence of the invention is the complete separation of the rolled material from the flow of the cooling medium. The deflecting device is made in the form of at least one air inlet pipe located in the wall of the cooling pipe, a funnel-shaped expansion is made in the upper half of the pipe with a constant cross section larger than the pipe cross section, and in the lower half, increasing along the rolling material the axes of the nozzles are located on the common generatrix of the pipe, the axes of the nozzles intersect the axis of the pipe, and the cross-sectional area of each air supply pipe is 5-30% of the cross-sectional area Cheney cooling tube, wherein the angle formed by the longitudinal pipe axis and a straight connecting the middle projections input and output sections funnel expansion equal to half the angle formed by the longitudinal axis of the pipe and forming a funnel-shaped expansion. 4 C.p. f-ly, 2 ill. Yo

Description

The invention relates to a tip of a cooling device for an extended rolling material to remove used cooling medium. These types of cooling devices are used in small grades and wire rolling mills.

The aim of the invention is to reduce the cost of equipment and energy consumption during operation of the cooling sections in small grades and wire rolling plants. The cooling section should work without interference.

The basis of the invention is the task of creating a tip of the cooling device for long rolling

a material for removing the used cooling medium, which eliminates the functional disadvantages of the known cooling devices that arise due to insufficient deviation of the used cooling medium. At the same time, the tip deflecting the cooling medium must be so influenced that only an extremely small fraction of the cooling medium together with the rolled material falls into the subsequent equipment, and the predominant part is separated from the rolled material. Separation should occur without energetically costly summing up of the environment.

00

with

Joint venture

about

(L

SLE

According to the invention, the guide channel of the rolled material before the funnel-shaped expansion is connected via at least one air channel to the air space surrounding the cooling pipe and the transition of the guide channel for the rolled material to the funnel-shaped expansion in the section of the air ducts in the guide channel for the rolled material is made in the form of a step-like expansion, with the air channels being on the common line of the cooling pipe body.

It has been shown that if the middle axis of the air channels crosses the middle axis of the guide channel for the material being rolled, the best deflection results are achieved.

This relates to the invention that the cross-sectional area of each air channel is from 5 to 30% of the cross-sectional area of the guide channel for the material being rolled. The funnel-shaped expansion axis is aligned so that it intersects the axis of the guide channel for the material to be rolled at an acute angle, which is preferably half as small as the funnel-shaped angle.

In FIG. 1 shows a tip in section along the longitudinal axis of the cooling pipe; figure 2 is a view in the direction A to the exit side of the tip.

The cooling pipe 1 encloses a guide channel for the rolling material 2, which from the outlet side into the funnel-shaped extension 3 thus enters that the axis of the cone of the funnel-shaped extension 3 intersects the axis of the guide channel for the rolling material 2 at an acute angle a. which is exactly half smaller than that selected by the diffuser criterion and amounting to a 12 ° angle of expansion / funnel-shaped expansion 3. The length a of the funnel-shaped extension 3 is 2.5 times longer than the conditional passage b of the guide channel for the rolling material 2. Immediately before the start of the funnel-shaped expansion 3, the air channel 4 enters the guide channel for the rolling material 2, which is connected via this air channel 4 to the filled cooling air surrounding the cooling pipe 1 simply the wreckage. The air channel 4 has the shape of a cylinder, the axis of which intersects the axis

guide channel for rolled material 2 at an angle of 90 °. The cross-sectional area of the air channel 4 is 16% of the cross-sectional area of the guide channel for the rolling material 2. The input cross-section of the funnel-shaped extension

3 is larger than the cross-section of the guide channel for the rolling material 2 and in the wall of the guide channel for the rolling material 2 located opposite to the entrance of the air channel into the guide channel for the rolling material 2

the wall. On both sides of this connected funnel-shaped attachment point 3 to the guide channel for rolling material 2, the transition of the guide channel for rolling

material 2 in a funnel-shaped extension 3 is made along the circle stepwise with an increasing step size, which has a maximum in the plane of entry of the air channel 4 into the guide channel for the rolling material 2.

In the same direction as the rolling material 5 in the guide channel 2 of the cooling pipe 1, the flowing stream of the cooling medium W draws in air at atmospheric pressure L through the air channel 4 from the surrounding pipe 1, which, before it can be moved with the cooling medium W,

it enters the funnel-shaped area 3 and there, due to flow separation, forms an increased local flow resistance. This increased local flow resistance causes a deviation.

passing a funnel-shaped expansion 3 of the flow of the cooling medium W to the opposite from the air channel inlet

4c is a guide channel for rolled material 2 direction.

The deflected stream of cooling medium W exiting from the funnel-shaped expansion 3 expands fan-shaped and has a cross section approximately in the shape of a circular segment. Its resulting direction deviates so much from the rolling direction that between the lateral surface of the jets from the side of the rolled material and the direction of the rolled material, an acute angle y is formed, which is larger than the expansion angle ft of the funnel-shaped expansion 3.

Thanks to this, the coolant flow W is already several centimeters behind.

end of the cooling pipe 1 is almost completely separated from the rolled material 5.

Claims (5)

Formula 1, A pipe for cooling rolled material in water-cooled lines, comprising a housing connected to a refrigerant supply system, the direction of movement of the refrigerant and rolled material being the same, having a funnel-shaped extension in its end part and a deflector arranged in front of the funnel-shaped extension, characterized so that the deflecting device is made in the form of at least one open air supply pipe located in the pipe wall and connecting the hollow of the pipe with the environment, a funnel-shaped expansion is made in the upper half of the pipe with a constant cross section larger than the pipe bore, and in the lower half with an increasing cross section along the rolling material, this axis of the nozzles are placed on the common generatrix of the pipe. 2. Pipe pop. 1, with the exception that the axes of the pipes are intersected with the axis of the pipe. 3. The pipe according to claim 1, characterized in that that the cross-sectional area of each air inlet pipe is 5-30% of the cross-sectional area of the cooling pipe. 4. The pipe according to claim 1, wherein the straight line connecting the middle of the projections of the inlet and outlet sections of the funnel-shaped extension is intersected with the longitudinal axis of the cooling pipe under sharp angle. 5. The pipe according to claim 1, characterized in that the angle formed by the longitudinal axis of the pipe and the straight line connecting the middle of the projections of the inlet and outlet sections of the funnel-shaped extension is equal to half the angle formed by the longitudinal axis of the pipe and forming a funnel-shaped extension. J 5