JPH0320038Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a slab guide roller for continuous casting equipment.

[Conventional technology]

Conventionally, the slab guiding device located at the bottom of the mold in continuous casting equipment has been designed to sandwich the slab between rotatable rolls to prevent damage to the surface of the hot slab, which has a surface temperature of 1200°C or higher. I was guiding. Therefore, cooling water piping was provided in a closed circuit in the bearing portion of the roller to protect the bearing from conductive heat and radiant heat from the slab.

As shown in FIG. 5, a bearing 22 of a roller 21 that guides the slab 20 is supported by a bearing box 23. If this bearing 22 remains at a high temperature for a long time, the lubricating oil supplied to the bearing 22 will seize up, which will impede the smooth rotation of the roller and prevent it from functioning as a slab guide roller. A cooling water chamber 24 is provided in the bearing box 23 for cooling by surrounding it with circulating water in order to protect it from the high-temperature radiant heat of the slab.

A cooling water pipe 25 is attached to the cooling water chamber 24 as if in a closed circuit state. Therefore, the circulating water supplied from the supply port 26 circulates through the cooling water chamber 24 and then exits from the discharge port 27, but the cooling water is introduced into the supply port 26' of the adjacent bearing box connected in series. However, the circulating water is heated by radiant heat, causing a boiling phenomenon, and air accumulates in the cooling water chamber 24. In this state, the high heat transmitted from the roller 21 cannot be prevented, and the life of the bearing 22 is shortened. Problems continued to occur. A possible solution to these drawbacks is to connect cooling water supply piping to each bearing box 23, but in such a case, the piping becomes extremely complicated and equipment costs also increase. I will do it.

[Problem that the invention attempts to solve]

In this way, in the past, the guide rollers of the slab were not directly cooled, so it was not possible to protect the bearings from conductive heat. There was also a risk that air would accumulate in the cooling water chamber.

The present invention aims to solve these conventional problems and improve the guide roller so that it can be directly cooled. Another object is to provide a roller mechanism having a cooling device that prevents air from accumulating in the cooling water chamber.

[Means to try to solve problems]

In order to achieve this objective, the present invention has the following configuration.

That is, in the slab guide roller that guides the slab, there is a cooling water supply port in one of the cooling water chambers of the bearing box, a cooling water discharge port in the other cooling water chamber of the bearing box, and a cooling water outlet connected to the discharge port. By providing a nozzle for discharging the discharged cooling water toward the body of the roller, the roller can be directly cooled, and the slab guide roller in continuous casting equipment does not allow air to accumulate in the cooling water chamber. It is.

[Example and operation]

Hereinafter, the present invention will be described with reference to drawings of embodiments.

1 to 4 are explanatory diagrams showing the cooling device of the present invention.

In FIGS. 1 and 2, bearings 3 of rollers 2 that clamp and guide a slab 1 having a high temperature of 1200° C. or more are supported by bearing boxes 4, respectively.

In order to prevent the bearing 3 from becoming too hot, the bearing box 4 is provided with a cooling water chamber 5 having a cooling water supply port 6 and a cooling water discharge port 7. Piping for supplying cooling water is installed in a so-called open circuit.

That is, the main pipe 8 of the supply cooling water is connected to the supply port 6 by a branch pipe 9, which passes through the cooling water chamber 5, reaches the discharge port 7, and then the cooling water exits into the atmosphere through short pipes. A nozzle 11 directed toward the surface of the roller 2 via the roller 10 is provided.

3 and 4 show another embodiment, in which the cooling water is supplied from the cooling water supply port 13 in the bearing box 12 through the cooling water channel 14 to the upper end of the bearing box 12 located at the top of the cooling water channel 14. A discharge port 15 is provided. A nozzle 17 is provided from which the cooling water is directed to the surface of the roller 2 via a short pipe 16 which exits into the atmosphere.

Next, the operation of the present invention will be explained.

The cooling water supplied from the bearing boxes 4 and 12 and the supply ports 6 and 13 cools the bearing 3 while passing through the cooling water chamber 5 or the cooling water channel 14 and reaching the drain ports 7 and 15.

During that time, the somewhat warm cooling water flows through the short pipe 1.
It is ejected from the nozzles 11 and 17 toward the surface of the roller 2 via the nozzles 0 and 16. Since the nozzles 11 and 17 have small holes or elongated holes, the cooling water is splashed vigorously and cools the surface of the roller 2 in just the right amount.

Furthermore, in order to prevent air from accumulating in the cooling water chamber, which is another objective, the nozzle 11,
Discharging cooling water from 17 is effective because air is also discharged. Furthermore, as shown in the drawings of other embodiments, when the cooling water is discharged from the nozzle 17 connected to the drain port 15 at the top of the cooling water channel 14, there is no place where air can accumulate, so it is completely safe.

[Effect of idea]

As described above, according to the present invention, since the guide roller is directly cooled, it can be sufficiently cooled, and there is no problem with the bearing, making it economical. In addition, since the cooling water can be discharged from the bearing box's cooling water chamber with a nozzle, there is no need to worry about air accumulation and the cooling effect is stable.

[Brief explanation of the drawing]

Figure 1 is an assembly diagram showing the cooling device of the present invention;
The figure is a view from arrow A showing the cooling device of the present invention, FIG. 3 is a diagram of another embodiment of the cooling device of the present invention, FIG. 4 is a bird's-eye view of another embodiment of the cooling device of the present invention, and FIG. The figure is an assembly diagram showing a conventional cooling water pipe. 1... Slab, 2... Guide roller, 3... Bearing, 4, 12, 23... Bearing box, 5, 24...
Cooling water chamber, 6, 13, 26... Supply port, 7, 1
5, 27...Discharge port, 9...Branch pipe, 11, 17...
...Nozzle, 14...Cooling channel, 25...Piping.

Claims (1)

[Scope of utility model registration request] A slab guide roller that guides the slab has a cooling water supply port in one of the cooling water chambers of the bearing box, a cooling water discharge port in the other cooling water chamber of the bearing box, and a roller connected to the discharge port. 1. A slab guide roller for continuous casting equipment, comprising a nozzle for discharging the discharged cooling water toward a cylinder of the slab.