JPS586571Y2 - Cooling equipment for hot rolled materials - Google Patents

Description

[Detailed Description of the Invention] The present invention is a cooling device for a hot rolled material, in particular, a hot rolled material (strip) is cooled on a hot run table before it is rolled up after coming out of a rolling mill. The present invention relates to a cooling device that controls the temperature of the strip at that time.

For example, in a continuous hot rolling facility, a strip that has undergone finish rolling is water cooled while running on a hot run table, and is wound up when the temperature has dropped to a predetermined temperature.

The temperature at this time (winding temperature) is determined depending on the product quality, and the temperature control of the strip on the hot run table has an important influence on the product quality, similar to the temperature control during rolling.

As a cooling device for controlling the winding temperature of the IJ tube, a device that cools the strip by dropping cooling water in the form of a water plate (curtain shape) in the width direction of the strip has an excellent effect.

The present invention belongs to this type of cooling device.

Included in the cooling device is a device that turns on and off the injection of cooling water into a water plate, which plays an important role in controlling the winding temperature.

Conventional devices for turning on and off the injection of cooling water used a cylinder that used a cylinder to press a plate or the like that matched the shape of the nozzle into close contact with the upper opening of the nozzle and then separate it from the nozzle, but the above-mentioned on/off device It is useful when the cooling water storage tank (header outer pipe) is an open type, but it is difficult to use it in a hot rolled material cooling device that has a closed type water storage tank, or if it is used, the structure will be complicated and the manufacturing cost will be high. However, it has the drawbacks of being expensive and difficult to maintain and inspect.

The present invention has been made in order to correct the above-mentioned drawbacks and provide a cooling device for hot-rolled materials that has a simple structure and is equipped with a device that can reliably and easily turn on and off the injection of cooling water. A hot-rolled material cooling device comprising a cooling water header that drops cooling water onto the upper surface of the hot-rolled material, and the header is equipped with a nozzle having a discharge port that extends in a strip shape in the direction of the thickness of the hot-rolled material. , a rotating arm whose rotation center is a shaft extending in the same direction as the longitudinal direction of the discharge port;
A cylinder device for driving the arm, a nozzle outlet opening/closing lid is attached to the arm, and a sealing material of a desired shape is attached to the nozzle tip or the lid.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the upper header in the cooling device of the present invention.

The header outer tube 1 in the shape of a circular pipe has a nozzle 2 at its bottom, and the nozzle 2 has a slit shape (in the direction of the thickness of the strip) extending in the same direction as the central axis of the header outer tube 1 (in the direction of the thickness of the strip).
It is equipped with a belt-shaped discharge port 3.

As described above, the rudder has a belt-shaped discharge port 3, and the ladder has a nozzle 2 that allows a continuous plate-shaped water stream to fall from the discharge port 3 to the upper surface of the strip in the direction of the plate thickness. This device includes a lid 4 that opens and closes the discharge port 3, a plurality of support arms 5 that support the lid 4, and a cylinder device 6 that rotates the support arm 5. , the support arm 5 is fixed to the shaft 7 extending in the longitudinal direction of the discharge port 3, the piston rod of the cylinder device 6 is connected to the drive arm 8 fixed to the shaft 7, and the bracket 10 is attached to the header support member 9. Both ends of the shaft 7 are rotatably supported via bearings 11, and the cylinder device 6 is pivotally supported by the header support member 9.

On the other hand, a sealing material 12 shaped to surround the discharge port 3 is attached to the tip of the nozzle 2 .

Note that the sealing material may be attached to the lid.

Further, the header outer tube 1 has a built-in conduit 13 for appropriately controlling the pressure distribution of the cooling water in the strip width direction, and a large number of water outflow holes 1 which are opened upwardly at equal intervals.
An in-header water supply pipe 15 having a pipe 4 provided in the pipe portion is installed.

One end of the header water supply pipe 15 is a water supply port (water supply end) 16
The other end is closed by a cap 17.

Further, both ends of the header outer tube 1 are closed by plates 18, and a communication tube 20 is provided at the top of the header outer tube 1, which communicates with the header outer tube 1 through a communication path 19.

Next, the operating procedure of the cooling device having the above configuration will be explained.

(I) The piston rod of the cylinder device 6 is extended and the lid 4 is brought into pressure contact with the sealing material 12 to close the discharge port 3.

Cooling water is supplied into the header outer pipe 1 from the header inner water supply pipe 15.

During the process of cooling water flowing into the header outer pipe 1, the air existing in the header outer pipe 1 is transferred to the communication path 19 and the communication pipe 2.
It passes through 0 etc. and is discharged outside.

(4) If the piston rod of the cylinder device 6 is shortened and the support arm 5 is rotated in the direction of arrow a, the discharge port 3
is opened, and a continuous plate-shaped water stream falls from the discharge port 3 onto the upper surface of the strip in the direction of the thickness of the strip, thereby cooling the strip.

■Supply cooling water from the water supply pipe 15 inside the header so that the water level inside the header outer pipe 1 does not drop.

The structures of the header outer pipe and the header inner water supply pipe are not limited to those in the above embodiments, and may be of any structure as long as they can continuously supply cooling water to the nozzles.

According to the cooling device for hot rolled material of the present invention, (i) generation of plate-like falling water flow is turned on and off at the nozzle discharge port;
It is possible to generate and stop the water flow at once when the water flow starts falling and when the water flow stops falling.

(11) Since a pressing force acts on the sealing portion and little shearing force, the sealing material is less worn out and its lifespan is extended.

(1 [D) With a simple structure, plate-like falling water flow generation can be turned on and off easily and reliably.

It can produce excellent effects such as

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an upper header in a cooling device for hot rolled material according to the present invention, and FIG. 2 is a view taken in the direction of the arrows ■■ in FIG. 1. DESCRIPTION OF SYMBOLS 1... Header outer tube, 2... Nozzle, 3... Discharge port, 4... Lid, 5... Support arm, 6... Cylinder device, 7... Shaft, 12...・Seal material.

Claims (1)

[Scope of utility model registration request] A hot-rolled material cooling system comprising a cooling water header that drops cooling water onto the upper surface of the hot-rolled material as it passes, and the header is equipped with a nozzle having a discharge port that extends long in the direction of the plate thickness of the hot-rolled material. The device includes a rotating arm whose rotation center is a shaft extending in the same direction as the longitudinal direction of the discharge port;
A cooling device for hot rolled material, comprising: a cylinder device for driving the arm; a nozzle outlet opening/closing lid is attached to the arm; and a sealing material having a desired shape is attached to the nozzle tip or the lid.