SU1721101A1 - Rolled product cooling apparatus - Google Patents

Abstract

The invention relates to rolling production, in particular to the accelerated cooling of rolled products in the stream of hot rolling mills. The purpose of the invention is to improve the operating conditions and quality of processing by more complete removal of the spent cooler. The device contains successively placed receiving hopper 1, nozzle 2, cooling chambers 3, cooling cooler 4. Longitudinal fins 5 are attached to the internal surface of the cooling chambers 3 with placement of a part of their length in the cooling chambers 4. The ends of the longitudinal ribs 5 are inclined at an acute angle to their edges fixed on the cooling chamber 3. At the ends of the longitudinal ribs 5 placed in the cooler discharge chamber 4, transverse plates 6 are fixed. In addition, the section of the cooling chamber 3 adjacent to the cooler discharge chamber 4 is made with smooth expansion, and the upper transverse plate 6 is elongated to form a canopy above the remaining plates 6 underneath it and bent down along both sides of the vertical plane passing through the longitudinal axis of the device. 2 z.P. f-ly, 7 ill. THX

Description

The invention relates to rolling production, in particular to the accelerated cooling of rolled products in the stream of hot rolling mills.

The purpose of the invention is to improve the operating conditions and quality of processing by more complete removal of the spent cooler.

Figure 1 presents a General view of the device when cooling a round profile, a longitudinal section; figure 2 - section aa in figure 1; FIG. 3 shows an embodiment of a portion of the cooling chamber adjacent to the cooler discharge chamber; figure 4 is a variant of the section aa in figure 1 while cooling the corner profile; figure 5

- a longitudinal section of a portion of the cooling chamber adjacent to the cooler discharge chamber when the channel is cooled; 6 and 7 are cuts BB and B-B in FIG. 5, respectively.

The device for accelerated cooling of the rental includes a receiving funnel 1, a nozzle 2, cooling chambers 3 and cooling cooler 4. Longitudinal ribs 5 are attached to the internal surface of the cooling chambers 3 with part of their length in the cooling chambers 4. The ends of the longitudinal ribs 5 are inclined at an acute angle to their edges fixed on the cooling chamber 3. At the ends of the longitudinal ribs 5, placed in the chamber 4

about

reset the cooler, fixed transverse plate 6. Longitudinal ribs 5 together with plates 6 form a cut-off group, the number of which is determined by the complexity of the profile of the cooled stock (see Fig.2, 4, 6).

In order to further form the flow of the cut off cooler in the direction, the portion of the cooling chamber 3 adjacent to the cooler discharge chamber 4 is made with a smooth expansion (see FIG. 3).

When cooling, the rolls with the upper horizontal edge (channel, beam), the upper transverse plate 6 are full and extended to form a visor above the remaining 6 plates below and bent down on both sides of the vertical plane passing through the longitudinal axis device (see figure 5-7).

Cooling chamber 3 with longitudinal ribs 5 and transverse plates 6 and cooler reset chamber 4 are made detachable. .

The device works as follows.

During thermal strengthening, the roll through the receiving hopper 1 enters the cooling chamber 3, where the nozzle 2 creates a moving flow of a cooler, for example water, with excessive static pressure. Due to the flushing of the roll by a cooler with excessive static pressure, a high-speed cooling of the roll to a predetermined temperature occurs. Longitudinal ribs

5, the free flow of the cooler is passed, and for the roll, they are guides, limiting its movement in a plane perpendicular to the rolling axis. The transverse plate 6 cut from the roll cooler, smoothly changing the direction of its flow. Further, the cooler is reflected from the walls of the discharge chamber 4 of the cooler, is collected in its lower part and is discharged through the opening. When performing the cooling chamber 3 with smooth expansion in the area adjacent to the cooler discharge chamber 4, the flow of the cut-off cooler is additionally formed in the direction indicated by the expansion and the plates

6 (cm, fig.Z). In the case when the roll has an upper horizontal face (channel, beam) on which the cooler can be carried beyond the cooling device, the cut-off cooler is not directed upwards, but to the sides due to the special design of the top plate b (see Figures 5-7) .

The use of the proposed device for the accelerated cooling of rolled products allows for a more complete removal

exhaust cooler at an increased relative speed of the cooling flow to conduct a deeper cooling of the roll. Under the conditions of an operating continuous medium-sized mill, where it is impossible to reduce the temperature of the end of interrupted metal cooling by increasing the length of the active cooling zone, this reduction is ensured.

0 temperature at 80-100 ° C. Reducing the temperature of the rolled metal to 550–570 ° C at a cooling rate of about 600 ° C / s makes it possible to form the structural state of low carbon steel, which provides an increase in the strength of finished rolled products to 620–660 MPa. Also, in the absence of removal of the cooler from the device to the refrigerator, the size of the mechanical properties along the length of the finished product decreases. As a result, the yield of rolled products for higher strength classes 440 and 490 is increased in accordance with the requirements for thermomechanically strengthened rolled products according to TU 14-15-146-85. At the same time, with the elimination of significant emissions of exhaust coolant into the mill line, the operating conditions of the mill equipment and the safety of work are improved.

Claims (3)

Invention Formula 0 1. A device for cooling rolled products, containing successively placed receiving hopper, nozzle, cooling chamber, cutter, made in the form of longitudinal ribs and attached to 5 them at an angle of transverse plates that form an opening for the passage of the car, as well as a cooler discharge chamber, characterized in that, in order to improve the operating conditions and the quality of processing 0 due to the complete removal of the spent cooler, the longitudinal ribs are fixed in the cooling chamber with the placement of part of their length in the cooler discharge chamber, and the transverse plates are fixed in the chamber 5 reset the cooler at the ends of the longitudinal ribs, made with an inclination at an acute angle to their edges attached to the cooling chamber. 2. The device according to claim 1, of which is a section of the cooling chamber; Adjacent to the discharge chamber of the cooler, is made with a smooth extension. 3. A pop device, 1, characterized by the fact that the upper transverse plate 5 is made elongated with the formation of a visor above the plates below it and bent down on both sides of the vertical plane passing through the longitudinal axis of the device. -about cm " I four 0 Xh I L I 3 OsNXVSN FIG. 6 Fig