JPS5940430Y2 - Tube rod end heating device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an end heating device for heating the ends of steel pipes, steel bars, etc. for forging. Another object of the present invention is to provide an apparatus that can eliminate temperature non-uniformity and obtain a good heating state.

As a means for simultaneously and continuously heating the ends of a large number of baton materials, there is a method of heating the baton materials by transferring them in a direction perpendicular to the axis while rotating them into an atmosphere heating furnace having an opening.

In this method, as shown in Fig. 1, the end of the baton material 1 is put into the furnace 2 through the opening 3 of the heating furnace 2 and transferred by rotation. In order to obtain a constant heating length at the end of the baton material 1, a nozzle 4 is installed on the top of the baton material 1 being transferred to cool it with water in order to prevent heat conduction at a position a certain length from the end. do the
A saucer 5 for collecting the cooling water spouted from the nozzle 4 was installed below the cooling position.

However, in such a conventional method, the furnace heat from inside the furnace 2 comes out from the opening 3 and blows up as shown by the arrow, causing thermal deformation or burnout of the nozzle installed near the opening 3. This causes variations in the method of ejecting cooling water, resulting in variations in the heating length of each baton material 1, and also because of the blowing up of the furnace heat at the opening 3, the cooling water scatters, causing damage to the heating section. This has the disadvantage of causing temperature non-uniformity.

Furthermore, the cooling water supplied to the nozzle 4 has pressure fluctuations due to pressurized water in the factory, and there are also disadvantages in that a change in the amount of water causes a poor temperature distribution at the heating boundary.

In order to eliminate such conventional drawbacks and achieve the intended purpose, the present invention installs a water tank at the opening of the heating furnace over the entire length of the furnace in the direction of conveyance of the baton material, and submerges the tip of the baton in water. An example of this will be described in detail below.

In FIG. 2, reference numeral 10 denotes a baton material whose end is heated, and the end is inserted into the furnace 13 through the opening 12 of the heating furnace 11 and transported by the conveyor 14. It is rotated and transferred on the skid rail 15.

The heating furnace 11 has a burner 16 on the back wall, the front wall is open, and the opening 12 is provided over the entire length of the furnace. It is used to heat.

17 is a water tank provided on the furnace wall below the opening 120, and by always storing a certain amount of water, the water tank shell is protected from thermal deformation and burnout. It is designed to drain water from 18.

Reference numeral 19 denotes a fountain nozzle, the tip of which is submerged in the water tank 17 and squirts water sent from the water supply pipe 20 toward the baton material 10 from the water, and the baton passes through with the spouted water. A predetermined position at the end of the material 10 is cooled.

The shape of the fountain nozzle 19 may be one in which holes are formed at a constant pitch in a longitudinal direction, for example, in one row, in multiple rows, or in a staggered manner, or in which slits are formed in a constant width in the longitudinal direction.
One option is to use a special nozzle tip, but
It may be either.

As is clear from FIG. 3, the water tank 17 and the fountain nozzle 19 are provided below the opening 12 over the entire length of the furnace.

21 is a head tank that supplies water to the fountain nozzle 19 via the water supply pipe 20, and by maintaining a constant pressure with this head tank 21,
The amount of cooling water supplied to the fountain nozzle 19 can be made constant.

Here, the head tank 21 can be made vertically movable, a valve 22 can be provided in the middle of the water supply pipe 20, or the water pressure adjustment valve 2 can be
3, the amount of water can be adjusted.

The operation of the device of the present invention having the above configuration will be explained next.

As shown in FIG.
The end portion thereof is inserted into the furnace 13 through the inlet opening of 1.

The baton material 10 that has entered the furnace 13 is transferred while being heated for a certain length from the end, and the certain length of the end is heated to a certain temperature at the furnace exit.

While the baton material 10 is being heated and transferred, the aforementioned fountain nozzle 19 faces a position a certain length dimension from the end, and this position is cooled by the jetted water, and the cooling is achieved by the rotation of the baton material 10. Because it is being transported, cooling can be performed at a constant rate over the entire circumferential direction, and a portion of a constant length on the end side can be heated to a constant temperature with the cooling position as a boundary.

As explained above, the present invention is a fountain nozzle in which a water tank is installed across the length of the furnace at the bottom of the opening of an atmosphere heating furnace that heats the end of the baton material while rotating it, and the tip is submerged in water in this water tank. is installed, and the water jetted from the fountain nozzle cools a certain length from the end of the rotating baton material, so even if the hot air inside the furnace blows out from the opening, However, there is no direct influence on the fountain nozzle, so there is no variation in the spouted water due to thermal deformation of the nozzle, and the cooling position is always kept constant to avoid temperature unevenness, making it possible to obtain a good heating condition. This is a very useful idea.

Note that if the amount of cooling water is kept constant using a head tank or the like, it is possible to more effectively prevent defects in temperature distribution at the heating boundary portion due to changes in the amount of water.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a part of a conventional heating device, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is a perspective view thereof. 10 is a baton material, 11 is a heating furnace, 12 is an opening, 13 is inside the furnace, 17 is a water tank, and 19 is a fountain nozzle.

Claims (1)

[Scope of utility model registration request] It consists of a transfer mechanism that transfers the baton material while rotating it in a direction perpendicular to the axis of the baton material, and an atmosphere heating furnace that has an opening that heats a predetermined length of the end of the baton material that is rotationally transferred by the transfer mechanism. , spraying cooling water onto a predetermined length of the end of the baton material to be heated on the lower wall of the opening of the heating furnace;
A device for heating the end of a baton material, characterized in that a water tank in which a cooling fountain nozzle is arranged so that its tip is submerged in water is provided in the furnace length direction.