JPS6232644Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for continuously and uniformly cooling a long steel material having a circular cross-sectional outer periphery, such as a pipe material, a wire rod, or a round bar material.

It is well known that long steel materials such as pipes, wire rods, and round bars are subjected to heat treatment by heating and cooling in order to obtain desired properties, and these treatments are carried out continuously under specified conditions. It must be done uniformly and uniformly.

However, with conventional cooling means in particular, it is extremely difficult to uniformly apply the cooling effect to such steel materials, and in many cases there has been a problem of uneven cooling.

In other words, in recent years, a device has been developed as a method that can achieve the most uniform cooling, in which the steel material to be cooled is equipped with an annular header and a slit nozzle is used to inject cooling water onto the outer surface of the steel material from all directions. When cooling water is supplied to the header, the air accumulated in the upper part of the header mixes with the cooling water and is injected together with it, which disturbs the cooling water film and increases water splashing at the steel collision area, resulting in an uneven distribution. Cooling conditions could not be obtained, resulting in poor cooling efficiency.

The present invention has been developed in view of the above-mentioned circumstances in order to provide a cooling device for high-temperature steel that can eliminate uneven cooling caused by air intrusion.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, 1 is an annular header equipped with a slit nozzle 2 on its inner periphery, 3 is a slit width adjustment mechanism for the nozzle 2', and 4 is a water supply pipe connected to left and right positions on the outer periphery of the header 1. , the water supply pipe 4
is provided with a water supply on-off valve 7 which is opened and closed by the operation of a flow rate regulating valve 5 and a pneumatic cylinder 6, and the cylinder 6 is configured to be actuated by the operation of a solenoid switching valve 8. In addition, an air bleed pipe 9 is connected to the top of the header 1, and the air bleed pipe 9 is connected to the top of the header 1.
is provided with an air vent opening/closing valve 11 that opens and closes by the operation of the pneumatic cylinder 10;
is configured to be actuated by operating the solenoid switching valve 12, and the solenoid switching valve 12
is configured to be turned ON by opening the water supply on-off valve 7, and turned OFF after a certain period of time by a timer (not shown).

Now, when the solenoid switching valve 8 is turned on by a switch (not shown) and the water supply switching valve 7 is opened through the operation of the cylinder 6, the cooling water is supplied into the header 1 while the flow rate is adjusted by the flow rate adjustment valve 5. Ru.
At this time, the solenoid switching valve 12 is turned on as the water supply on-off valve is opened, and the air bleed valve 11 is opened through the operation of the cylinder 10. In this way, the water supply on-off valve 7 and the air venting on-off valve 11 are opened simultaneously, so that the air present in the header 1 is sequentially vented from the air vent pipe 9 by the supply of cooling water. Thereafter, the solenoid switching valve 12 is turned OFF by the operation of the timer, and the air vent opening/closing valve 11 is closed by the operation of the cylinder 10.

In general, the amount of air accumulated in the header 1 is
Since the time varies depending on the capacity of the header 1 and the slit nozzle 2, the gap between the slit nozzles 2, the amount of water supplied, etc., the operation of the timer is set at a time based on these various data.

Therefore, the cooling water injected from the header 1 through the slit nozzle 2 does not contain any air, and is in a rectified state.

In the above embodiment, each on-off valve is opened and closed via each solenoid switching valve and each pneumatic cylinder, but of course any other control system may be employed.

As explained above, according to the present invention, (i) a cooling water film with a high degree of rectification without air contamination can be obtained, thereby eliminating uneven cooling of steel materials;

(ii) Since the time for air to escape is short, less cooling water is wasted.

(iii) Since the structure is simple, it can be easily incorporated into equipment currently in operation.

It can produce excellent effects such as

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the entirety of the apparatus of the present invention, and FIG. 2 is a view taken along the - direction arrow in FIG. 1... Header, 2... Slit nozzle, 4...
Water supply pipe, 7... water supply on/off valve, 9... air vent pipe, 11... air vent on/off valve.

Claims (1)

[Scope of utility model registration request] A cooling device in which cooling water supplied from a water supply pipe into an annular header is injected inward from a slit nozzle to cool high-temperature steel materials such as pipes, wire rods, and round bars passing through the slit nozzle. A cooling device for high-temperature steel, characterized in that an air bleed pipe is connected to the air bleed pipe, and the air bleed pipe is equipped with an on-off valve.