JPH0315212Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pressure fluid injection header for more completely removing water on the upper surface of a rolled material in a hot rolling hot run table.

[Conventional technology]

Generally, in hot rolling lines, temperature control of rolled materials is performed for the purpose of ensuring product quality characteristics, preventing scale flaws on the product surface, and preventing overload on equipment. This is one of the essential requirements for working.

To perform this temperature control stably, accurate temperature measurement and elimination of disturbance factors are essential.
One of the problems in performing control is the so-called water riding phenomenon, in which descaling water and cooling water in the cooling zone accumulate on the upper surface of the rolled material. This water riding phenomenon occurs when measuring the temperature of rolled material.
This has become a disturbance factor in temperature control, having an adverse effect on the accuracy of measured temperatures and, in the cooling zone, on the cooling capacity.

Conventionally, as a countermeasure to prevent this water riding phenomenon from affecting temperature control, as shown in Fig. 2,
A pressure fluid injection header consisting of a pipe 7 and an injection nozzle 8 as shown in Fig. 3, which injects high-pressure water, is installed at the upper part of the entrance side of the temperature measurement position, or at the upper part of the exit side of each cooling bank in the cooling zone. There is a method in which the water 5 on the upper surface of the rolled material 1 is dammed up by being injected toward the rolled material 1 to prevent it from flowing downstream.

Pipe 7 constituting this conventional pressure fluid injection header
As shown in the plan views of FIGS. 4 and 5, the longitudinal direction of the line is perpendicular to the line flow direction and is formed in a straight line. In addition, a plurality of injection nozzles 8 are arranged in the longitudinal direction of the tube 7, and the installation pitches of the injection nozzles 8 are arranged on the upper surface of the rolled material 1 in an injection pattern 9g,
9h wraps in this longitudinal direction, so that the jetted water hits all of the longitudinal direction, that is, the width direction of the rolled material 1. At that time, in order to prevent the water jets from adjacent jet nozzles 8 from interfering with each other, the angle of the jet direction of the adjacent jet nozzles 8 relative to the upper surface of the rolled material 1 may be changed as shown in FIG. 4, or as shown in FIG. As shown, consideration has been given to disposing the spray pattern 9h so that it is oblique by a predetermined angle with respect to the width direction of the rolled material 1.

[Problem that the invention attempts to solve]

However, in these conventional pressure fluid injection headers, the injection patterns 9g and 9h are arranged in the width direction of the rolled material 1, so that the dammed water temporarily stagnates as shown in part X in FIG. Since the rolled material 1 is not immediately removed in the direction of the width end, the
There was a problem in that the accumulated water flowed in the direction of the arrow Y in the figure and could not be completely drained.

The present invention has been proposed in order to solve the above-mentioned problems, and an object of the present invention is to provide a pressure fluid injection header in which a plurality of injection nozzles are disposed at desired positions and drain water more completely.

〔Example〕

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

FIG. 1 is a plan view of an embodiment of the present invention, which is arranged so that the longitudinal direction of the tube 7 and the line flow direction are perpendicular. A communication pipe 7a is connected to the center of this pipe 7 so that its longitudinal direction is perpendicular. Further, an X-shaped communication pipe 7b connects both ends of the pipe 7. Injection nozzles 8a, 8b, 8
c, 8d, 8e, and 8f are arranged in the communication pipe 7b. Spray nozzles 8a, 8b...spray patterns 9a, 9b, 9c, 9d, 9 on the upper surface of the rolled material 1
To prevent e and 9f from wrapping each other, the rolled material 1
The spray angle relative to the top surface has been determined.

In addition, the injection nozzles 8a, 8b, and 8c inject to one side, that is, in an oblique direction on the drive side, and the injection nozzles 8d,
8e and 8f are arranged so as to spray to the other side, that is, to the working side diagonally. At this time, the spray nozzles 8a, 8b... are arranged so that each spray pattern 9a, 9b... completely covers the width of the rolled material 1, and sprays closer to both ends. Pressure water is supplied from the water supply port 10. In response to an approach signal from the tip of the rolled material 1, a city valve (not shown) provided at the water supply port 10 opens, and pressurized water reaches the pipe 7 through the water supply port 10. At this time, the pressure water flows from the communication pipe 7a to the communication pipe 7b in the direction of arrow Z.
The pressure water flowing in the direction and reaching each injection nozzle 8a, 8b... is injected from the injection nozzles 8a, 8b... onto the upper surface of the rolled material 1 with a predetermined spread, but the injection nozzles 8a, 8b, 8c are 1, the water 5 on the top surface is transferred to the drive side, and the injection nozzles 8d, 8e,
8f is removed toward the work side. For this reason, the distance to exclude the water 5 riding on it,
That is, since the distance from the position where the jetted water hits to the end of the rolled material 1 is shortened, the accumulation of water 5 at the injection position of the rolled material 1 is suppressed and eliminated. Also,
Looking at the spray patterns 9a, 9b..., on the driving side, the spray nozzles 8a are arranged so that 9c is located near the center of the width of the rolled material 1, and 9b and 9a are arranged further downstream and closer to the ends of the width of the rolled material 1. ,8
b, 8c are arranged. As a result, in the process of damming and removing the water 5 on the upper surface of the rolled material 1 toward the width end of the rolled material 1 by the energy of the water jetted from the injection nozzle 8c, the water did not reach the width end. Even if the water 5 rides on the upper surface of the rolled material 1 again and advances, it is pushed toward the width end by the injection nozzle 8b which sprays strongly, and is completely removed by the injection nozzle 8a which sprays even more powerfully.

Further, in this embodiment, the injection patterns 9a, 9b...
Although the lengths in the longitudinal direction are different, they may be the same. Moreover, it goes without saying that the number of injection nozzles 8a, 8b, . . . is not particularly limited.

[Effect of idea]

As described above, according to the present invention, the water on the upper surface of the rolled material can be removed more completely, and the temperature control in the hot rolling line can be carried out with high accuracy.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of a conventional pressure fluid injection header, Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2, and Fig. 4 is a diagram of the conventional pressure fluid injection header. FIG. 5 is a plan view of another conventional pressure fluid injection header. 1...Rolled material, 2...Hot run table, 7
...Pipe, 7a, 7b...Communication pipe, 8a, 8b, 8
c, 8d, 8e, 8f... injection nozzle, 9a, 9
b, 9c, 9d, 9e, 9f... Injection pattern.

Claims (1)

[Scope of utility model registration request] A nozzle header that intersects in an X-shape from downstream to upstream of the rolled material is provided above the hot run table of the hot rolling line, with the intersection point aligned with the center line of the rolled material, and the intersection of the nozzle headers is A pair of left and right head nozzles are arranged symmetrically in front of the point, and a plurality of subsequent pairs of left and right nozzle groups are arranged symmetrically in the rear from the intersection point of the nozzle headers, and each nozzle is rolled. The nozzles are provided with openings that open diagonally forward to form a diagonal spray pattern parallel to the nozzle header to which each nozzle belongs on the material, and from the leading nozzle pair, the jets intersect above the rolled material and spray onto the rolled material. An umbrella-shaped spray pattern is formed in which the cooling water is divided to the left and right at the center of the rolled material, and the cooling water split by the umbrella-shaped spray pattern from each subsequent nozzle pair is received by each diagonal spray pattern pair. A pressurized fluid injection header characterized in that cooling water is sequentially discharged to both diagonal rear sides of the rolled material through the rear diagonal injection pattern pairs.