JPS5935293Y2 - Cooling equipment for hot rolled materials - Google Patents

Description

[Detailed description of the invention] In the present invention, hot-rolled material (S) (IJ tube) is cooled on a hot run table before it comes out of the rolling mill and is wound up. This invention relates to a cooling device that controls temperature and sound.

For example, in continuous hot rolling equipment, a strip that has been finish rolled passes through a water cooling die 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 at this time (winding temperature) is determined by the product quality.
Temperature control of the whelk, like temperature control during rolling, has an important influence on product quality4.

As a cooling device for controlling the winding temperature and noise of the strip described above, a cooling device that cools the strip by injecting cooling water falling in a water plate shape (curtain shape) in the width direction of the IJ tube has excellent effects 4.

The present invention was made to provide a cooling device having the function of injecting water dropwise into the plate-shaped cooling water strip and controlling the pressure distribution of the water plate-shaped cooling water in a favorable manner. a header outer tube having a nozzle 4 for discharging a continuous plate-shaped water stream in the width direction of the hot-rolled material;
The inner wall of the header outer pipe on the side opposite to the nozzle has a large number of water outflow keys opening at approximately equal intervals from each other, and the water supply pipe inside the header outer pipe is completely closed at the water supply end and the opposite end. The present invention is characterized in that a conduit metal is installed in the water supply pipe for guiding part of the cooling water on the end side to the closed end side of the water supply pipe.

The present invention will be explained below with reference to sidetone drawings.

FIGS. 1 and 2 show examples of the upper header of the cooling device of the present invention.

The circular pipe-shaped header outer tube 1 has a nozzle 2 at its bottom, and the nozzle 2 is provided with a slit-shaped discharge port 34 extending in the same direction as the central axis of the header outer tube 1.

Inner header water supply pipe 4 that guides cooling water sound into header outer pipe 1
is supported within the header outer tube 1 in such a manner that it is close to the upper inner wall of the header outer tube 1 and has one end protruding from the end of the header outer tube 1 .

The inner header water supply pipe 4 has a large number of water outflow holes 5 which are opened at approximately equal intervals on the inner wall of the header outer pipe 1 on the opposite nozzle side, and the header inner water supply pipe inside the header outer pipe 1 The end portion is closed with a cap 6.

The end of the water supply pipe inside the header that protrudes from the end of the header outer pipe 1 serves as a water supply port (water supply end) 7.

The end of the header outer tube 1 is closed by a plate 8.9, forming a closed water tank.

A communication pipe 11 is provided at the top of the header outer pipe 1 and communicated with the header outer pipe 1 through a communication path 10.

The communication pipe 11 is connected to an overflow pipe (not shown).

On the other hand, a conduit 12 is installed in the header water supply pipe 4 to lead the cooling water to the end of the water supply end on the side of the partially gold cap 6 .

The conduit 12 is for controlling the pressure distribution 4 of the cooling water passing through the nozzle, and the diameter of the conduit 12 is the same as the internal flow path 13.
It is desirable that the cross-sectional area of the conduit flow path 14 is selected to be equal to the cross-sectional area of the conduit flow path 14.

A support member 15 interposed between the conduit 12 and the water mixing pipe 4 in the ladder to support the conduit 12 has a thin plate shape so as not to obstruct the flow 4 of cooling water in the conduit flow path 14, and has a circumferential shape. An appropriate number (four in the embodiment) are arranged at appropriate intervals in the direction.

Next, the operating cost will be explained.

In the operation preparation stage, the inside of the header outer tube 1 is made purple, and the discharge port of the nozzle 2 is closed by a metal opening/closing device (not shown), and in this state, cooling water is introduced to the water supply end 7.

The cooling water guided to the water supply end 7 has two courses: one course in which it immediately flows into one end of the conduit flow path 14, and the other course in which it flows into the other end of the conduit flow path 14 through the internal conduit flow path 13. The water flows into the conduit flow path 14 and is ejected from the water outlet hole 5 onto the inner wall of the header outer tube 1.

Cooling water spouted from the water outflow hole 5 falls smoothly along the inner wall of the outer ladder tube 1.

The water level inside the header outer tube 1 gradually rises, and the inside of the header outer tube 1 is filled with cooling water.

The cooling water in the header outer pipe 1 eventually flows into the communication pipe 11 from the communication path 10, and then flows out of the header outer pipe 1 through the overflow pipe k.

With the cooling water overflowing from the communication path 10 in this manner, the discharge port 3 is opened and the operation is started.

When the discharge port 3 is opened, the cooling water in the header outer tube 1 becomes a plate-shaped water stream from the discharge port 3 and falls onto the strip.

As described above, the cooling water at the water supply end 7 flows into the conduit flow path 14 in two courses, passes through the water outlet hole 5, and falls smoothly along the inner wall of the header outer pipe.

The amount of cooling water supplied to the header outer pipe 1 is appropriately selected within a range that allows the plate-shaped water flow from the discharge port 3 to be rectified.

The flow of cooling water in the communication pipe 11 during operation depends on the shape of the overflow pipe, the position of the outlet end of the overflow pipe,
It varies depending on the amount of cooling water supplied to the header outer pipe, etc.
In any case, the overflow tube metal is designed so that air does not flow into the header outer tube 1 from the connecting tube 11.

In the above configuration, the cross-sectional area of the channel 13 within the conduit is equal to the cross-sectional area of the channel 14, so cooling water flows into the channel 14 from both ends of the channel 14 at an equal flow rate. .

Therefore, the pressure distribution of the cooling water jetted out from the water outlet hole 5 has a substantially flat shape as shown by A in FIG. 3, and the pressure deviation is only hl.

Therefore, a uniform plate-shaped water flow is generated from the discharge port 3, and the strip is uniformly cooled in its width direction.

On the other hand, in a conventional cooling water lug that does not use a double pipe type water supply pipe in the header, the pressure distribution of the cooling water jetted out from the water outlet hole is as shown by B in Figure 3, from the opposite water supply end to the water supply end. It will be in a state where it is tilted significantly downward to the side, and the pressure deviation will be h2.

For this reason, a uniform plate-like water flow could not be obtained.

As mentioned above, it is desirable that the cross-sectional area of the channel 13 in the conduit is equal to the cross-sectional area of the conduit-like channel 14, but the uniformity of the channel cross-sectional area is not necessarily essential, and even in the case of unevenness. The pressure distribution of cooling water from the water outlet hole can be controlled.

In addition, the triple pipe configuration of the cooling water header - 4 header outer pipes, header internal water supply pipe, and conduit - can also be applied to the lower lug, and can also be implemented as a type of cooling device that does not connect the header outer pipe to the connecting pipe. Of course it is possible.

Since the present invention has the above-mentioned structure, it can generate a uniform plate-shaped water sound from the nozzle outlet, and can cool the strip uniformly, thereby achieving excellent effects such as metallic odor.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the upper header in the cooling device for hot rolled material of the present invention, Fig. 2 is a top view (partial sectional view) of the upper header, and Fig. 3 is the pressure distribution of cooling water. It is a diagram. 1... Header outer tube, 2... Tsuzuru, 3
...Discharge port, 4...Water supply pipe in the header, 5...Water outflow hole, 6...Cap,
7... Water supply end, 12... Conduit, A...
...Pressure distribution of cooling water in this invention, B...
...Pressure distribution of cooling water in conventional equipment.

Claims (1)

[Scope of utility model registration request] A header outer tube has a nozzle 4 that emits continuous plate-like water sound in the width direction of the hot-rolled material passing through it, and a large number of openings at approximately equal intervals on the inner wall of the header outer tube on the side opposite to the nozzle. A water supply pipe in the outer pipe of the header with a water outflow key and a metal block at the end opposite to the water supply end, and a part of the cooling water on the water supply end side of the water supply pipe is led to the closed end side of the water supply pipe. A cooling device for hot-rolled material, characterized by a conduit metal installed in the water supply pipe.