JPS632166Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a descaling device used in hot rolling equipment for steel materials.

BACKGROUND ART As shown in FIG. 1, a descaling splash water prevention cover 6 for a descaling device used in a well-known hot rolling facility has a conveyor roller table 1 and a rolled material 2 conveyed on the table 1. Horizontal roof-like upper surface portions 5 are formed in a cross-sectional shape on both left and right end side walls 4a and 4b so as to cover an upper descaling header 3a that injects high-pressure descaling water onto the rolled material from above. The system is configured to collect water and direct it to a drainage ditch (not shown) to prevent the scattered water from wetting other equipment or damaging the atmosphere of the workplace. This is a special public service issued in 1984.
This is known as a configuration typified by the cooling device described in Publication No. 27579.

However, because the descaling water is under high pressure,
Water jet 7 from the lower descaling header 3b
There was a problem in that the water hit the inner side 5a of the upper surface portion 5 of the cover 6, became scattered water 8, and fell onto the upper surface 2a of the material to be rolled 2, lowering the temperature of the material to be rolled 2 more than necessary.

Structure and operation of the invention Therefore, the inventors of the present invention constructed the upper surface portion 5b of the splashing water prevention cover 6a to be curved upward with respect to the conveying axis direction as shown in FIGS. 8b is directed toward the side walls 4a, 4b at both ends, and the amount of water falling onto the rolled material 2 has been successfully reduced significantly. Note that, as long as the inner side 5c of the upper surface portion 5b is curved upward, the structure of the upper surface portion 5b may adopt any suitable form. In FIGS. 3 and 4, 9 is the upper surface portion 5
This is the reinforcement beam in b.

Accordingly, in the present invention, water that falls onto the surface of the rolled material 2 without functioning as the original descaling jet water, such as the splashed water 8, 8b, is referred to as descaling surplus water.

Example When descaling a rolled low-carbon steel material with a width of 1320 mm and a thickness of 23 mm on the entry side of a finishing mill, a conventional cover 6 shown in FIG. 1 was used and a cover 6a according to the present invention was used. A temperature difference of 2 to 3° C. was observed in the finished exit temperature (center temperature) between the two cases. The finishing exit end temperature is approximately 1°C.
The improvement effect was obtained.

Note that the upward bending angle θ of the cover 6a is 90°~
Experiments were conducted with the angle set at 160°, but good results were obtained when the angle was 95 to 130°. The pressure of the descaling water in this case was 130 Kg/cm ² for both the upper and lower headers.

Effects of the Invention As described above, the present invention has the practically advantageous effect of preventing excessive cooling of the rolled material due to descaling leftover water, and greatly contributes to rolling technology.

[Brief explanation of the drawing]

1 and 2 are schematic cross-sectional and longitudinal sectional views of a conventional splashing water prevention cover, and FIGS. 3 and 4 are schematic cross-sectional and vertical sectional views of a splashing water prevention cover according to the present invention. 1... Conveyance roller table, 2... Material to be rolled,
3a, 3b...Upper/lower descaling header,
4a, 4b...Both end side walls, 5, 5b...Top surface part,
5a, 5c...Inner side of top surface, 6...Scattered water prevention cover, 7...Sprayed water, 8, 8b...Splashed water, 9...
...Reinforcement beam.

Claims (1)

[Scope of utility model registration request] In a descaling device in a hot rolling facility, the inside of the top surface of the splash prevention cover that covers the descaling header and the rolled material on the conveyance roller is curved upward with respect to the direction of the conveyance axis, and the water collides with the inside of the top surface. A descaling device for a hot rolling facility, wherein descaling surplus water is formed to flow toward both end side walls of the cover.