JPS62118914A - Cooling device for hot metallic plate - Google Patents

Abstract

PURPOSE:To obtain the cooling device equipping with sufficient high and low cooling capacities and high responsibility by making the composition that the water in-take of the nozzle for the slit laminer which opens for the header inner wall and of the nozzle for pipe laminer is selectively opened and closed by a change-over valve. CONSTITUTION:The water in-take 4a of the nozzle 4 for a pipe laminer is opened and the water in-take 2a of the nozzle 2 for a slit laminer is closed, when a change-over valve 7 is descended by air cylinder 5. With the ascent of the valve 7 by the cylinder 5 the water in-take 4a of the nozzle 4 is closed and the in-take 2a of the nozzle 2 is opened. In this way, the drainage pattern is changed and sufficient low cooling capacity and high cooling capacity are secured. Accordingly, the cooling device of the hot metallic plate equipping with sufficient high and low cooling capacities and high responsibility is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling device for a hot metal plate rolled in a hot rolling process.

[Conventional technology]

Conventionally, there has been a cooling device for a pipe lamina complete heat metal plate equipped with a header 1 and a nozzle 4 for pipe lamina as shown in FIG. A slit lamina complete hot metal plate cooling device is used in the hot rolling process.

Furthermore, Japanese Patent Publication No. 57-3736 discloses a device for sealing the slit laminar nozzle 4 from water, and Japanese Patent Publication No. 58-77710 discloses a flow rate adjustment gate for controlling the flow of cooling water from an overflow weir. A device has been proposed and disclosed.

[Problem that the invention seeks to solve]

However, since none of the conventional devices mentioned above are capable of achieving both high and low cooling performance, a set of pipe lamina is generally used for low cooling, and a set of slit lamina is used as a cooling system for high cooling performance.

There is no problem if you are satisfied with the cooling capacity of the hot rolling line, but if you are required to change the cooling capacity from low cooling capacity to high cooling capacity, the above-mentioned conventional equipment will not work. I couldn't deal with it.

Therefore, there is the above-mentioned device for adjusting the amount of water as a device for varying the cooling capacity, but it takes time to adjust the amount of water and cannot follow the rolling line speed of the hot rolling mill.

Moreover, as shown in FIG. 5, the relationship between the amount of cooling water W discharged from the slit laminar nozzle 2 and the heat transfer coefficient α is the curve 20, and the relationship between the cooling water Bw discharged from the pipe laminar nozzle 4 and the heat transfer coefficient α As shown by curve 21, there is a problem in that each individual nozzle cannot ensure a sufficient range of cooling performance.

Therefore, the present invention was proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a cooling device for a hot metal plate that has a sufficient range of low cooling capacity and high cooling capacity and has high responsiveness. With the goal.

[Means for solving problems]

The present invention was proposed to solve the above problems, and includes a header for storing cooling water, a slit laminar nozzle provided with a water intake opening on the inner wall of the header, and a slit laminar nozzle for storing cooling water. Select a plurality of pipe laminar nozzles that are provided so that water intake ports open on the inner wall of the header together with the nozzles, and a water intake port for the slit laminar nozzle or the pipe laminar nozzle that is provided on the inner wall of the header. This cooling device for hot metal plates is characterized by comprising a switching valve that opens and closes automatically, and a valve drive device that operates the switching valve.

[Effect]

Next, to explain the present invention in detail, by selectively opening and closing the water intake ports of the slit laminar nozzle and the pipe laminar nozzle, which are provided to open on the inner wall of the header, as shown in FIG. As shown in, for example, when the water amount is W1, the thermal conductivity coefficient α
The upper limit value is α1 and the lower limit value is α2, and by varying the amount of water, a sufficient range of low cooling ability and high cooling ability is provided, and the responsiveness is high.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings.

FIG. 1 shows a sectional view of this embodiment.

The header 1 stores cooling water supplied through the water supply pipe 3 inside the header.

Top M9 on header 2 with porto 6a and nut 6b
Install.

The slit laminar nozzle 2 is provided so that the water intake port 2a opens on the inner wall of the header 1, and the plurality of pipe laminar nozzles 4 are provided so that the water intake port 4a opens on the inner wall of the header l together with the slit laminar nozzle 2. 1 can be useful.

Next, the switching valve 7 is installed on the inner wall of the header l, and is raised and lowered by an air cylinder 5, which is a valve driving device, to selectively select the water intake port 2a of the slit laminar nozzle 2 or the water intake port 4a of the pipe laminar nozzle 4. open and close.

The cylindrical guide 8 functions to guide the switching valve 7 when it goes up and down, and when the switching valve 7 is supplying water to the slit laminar nozzle 2 as shown in FIG. The switching valve 7 is pressed against the inner wall of the header l to prevent water from leaking into the nozzle 4.

The bracket 11 is integrated with the guide 8 and presses the guide 8 against the inner wall of the header 1.

The sealing member 10 is for preventing water leakage from the opening 9a of the upper lid 9, which is provided as a passage for the switching valve 7.

Next, the operation of this embodiment will be explained.

3 and 4, which are cross-sectional views taken along the line A--A in FIG. 1, are diagrams showing water being discharged from the pipe laminar nozzle 4.

The air cylinder 5 lowers the switching valve 7 to open the water intake port 4a of the pipe laminar nozzle 4, and further closes the water intake port 2a of the slit laminar nozzle 2 to discharge water from the pipe laminar nozzle 4.

FIG. 2 is a diagram showing water being discharged from the slit laminar nozzle 2.

The switching valve 7 is raised by the air cylinder 5, the water intake port 4a of the pipe laminar nozzle 4 is closed, and the water intake port 2a of the slit laminar nozzle 2 is opened to discharge water from the slit laminar nozzle 2.

As described above, the water discharge pattern is changed by switching with the switching valve 7, and as shown in FIG. Ensure a range of cooling capacity.

Note that the mounting positions of the water intake port 2a of the slit laminar nozzle 2 and the vibrator laminar nozzle 4 are not limited to the embodiments shown in FIGS. 1 and 2, and the mounting may be reversed.

In this case, the upper part of the cut moss valve 7 is set horizontally and the bracket 11
It is preferable that the guides 8 and 8 be located midway between the water intake ports 2a and 4a of the respective slit laminar nozzles 2 and pipe laminar nozzles 4.

〔Effect of the invention〕

As explained above, the present invention has the advantage of having a sufficient range of low cooling capacity and high cooling capacity, and high responsiveness.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of one embodiment of the present invention, and FIG.
FIG. 2 is a partially enlarged sectional view of the illustrated embodiment. Figure 3 is a cross-sectional view taken along the line A-A of the embodiment shown in Figure 1, Figure 4 is a side view of the embodiment shown in Figure 1, Figure 5 is a diagram showing the relationship between water volume and heat transfer coefficient, and Figure 6 is a pipe laminate. FIG. 7 is a side view of a conventional slit lamina set. 1...Header

Claims (1)

[Claims] 1. A header for storing cooling water, a slit laminar nozzle provided so that a water intake port opens on the inner wall of the header, and a water intake port provided together with the slit laminar nozzle such that the water intake port opens on the inner wall of the header. A plurality of pipe laminar nozzles, a switching valve that is provided on the inner wall of the header and selectively opens and closes the water intake of the slit laminar nozzle or the pipe laminar nozzle, and a valve drive device that operates the switching valve. A thermal metal plate cooling device comprising: