JPH0441165Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a cooling device used to continuously cool a wire, especially a cooling water pipe that is cooled from the outside and which continuously passes the wire into the inside of a cooling water pipe. This invention relates to a cooling device for cooling wire.

[Prior Art] Wire rods that require solution treatment, especially wire rods made of Υ series stainless steel or titanium, need to be cooled and annealed as soon as possible after heating.

As shown in FIG. 2, in the conventional annealing apparatus, the drawn wire S is passed through a heating tube 4 to be heated, and then passed through a cooling tube 7 to be cooled. Cooling device 5
A cooling pipe 7 is supported through a cooling water tank 6, and cooling water flows through the cooling water tank 6. The heating tube 4 and the cooling tube 7 are coaxially connected via a heat insulating material, and a reducing gas or an inert gas flows through the interior thereof.

The conventional cooling device 5 described above has a slow cooling rate and requires a long cooling pipe 7 in order to cool the wire S to a predetermined temperature.

[Problems to be solved by the invention] The purpose of the invention is to provide a wire cooling device that uses the latent heat of vaporization of the refrigerant to increase cooling efficiency and can rapidly cool the wire even with a short cooling pipe. .

[Means for Solving the Problem] In order to achieve the above object, the cooling efficiency is increased by utilizing the heat pipe principle, and the length of the cooling pipe is shortened.

That is, the configuration of the present invention is such that a reduced pressure chamber filled with a small amount of refrigerant is defined at the bottom of the cooling water tank, and a cooling pipe that partially contacts the refrigerant in the reduced pressure chamber is provided through the reduced pressure chamber. The wire is passed through it.

[Function] The heat of the wire S is absorbed by the cooling pipe 7 while passing through the reducing atmosphere or inert atmosphere of the cooling pipe 7. The cooling pipe 7 is arranged inside the decompression chamber 12,
Since this bottom is in contact with the refrigerant (water) 13, it is cooled by the latent heat of evaporation of the refrigerant adhering to the peripheral wall of the cooling pipe 7.

The refrigerant adhering to the cooling pipe 7 absorbs the heat of the cooling pipe 7 and evaporates in the decompression chamber 12. The refrigerant gas rises and is cooled and condensed at the tube wall 10a of the decompression chamber 12 by the water 8 flowing through the cooling water tank 6. The condensed refrigerant liquid accumulates at the bottom of the decompression chamber 12 and adheres to the wall of the cooling tube 7 again by capillary action.

As described above, the refrigerant cools the cooling pipe 7 while repeating evaporation and condensation.

[Embodiment of the invention] FIG. 1 is a side sectional view showing the configuration of a cooling device that cools a wire S passing through an inert atmosphere of a heating tube 4 of a heating device 2 after heating it. A cooling pipe 7 connected to the heating pipe 4 via a heat insulating material is supported through the decompression chamber 12 . The decompression chamber 12 is preferably composed of a large-diameter pipe 10, and is decompressed to a predetermined pressure by a vacuum pump (not shown). However, a partition wall may be provided at the bottom of the cooling water tank 6 to partition the reduced pressure chamber.

Cooling water 8 flows through the cooling water tank 6, and the decompression chamber 12
The peripheral wall of is cooled. The cooling pipe 7 is connected to the bottom of the decompression chamber 12 to supply a small amount of refrigerant 1 filled in the bottom of the decompression chamber 12.
It is arranged so as to be in contact with 3. It is preferable that the cooling pipe 7 is made of a material with a rough surface, such as a cast iron pipe, or has a structure in which a wire such as felt is wrapped around the outer peripheral surface to promote evaporation of the refrigerant.

Next, the operation of the wire cooling device according to the present invention will be explained. The heating tube 4 and the cooling tube 7 connected thereto are filled with reducing gas or inert gas. The wire S that has passed through the heating tube 4 enters the cooling tube 7 and is cooled by inert gas. The inert gas absorbs heat on the peripheral wall of the cooling pipe 7 and is cooled. Since the refrigerant 13 at the bottom of the decompression chamber 12 is attached to the peripheral wall of the cooling pipe 7, the heat absorbed by the cooling pipe 7 evaporates the refrigerant. Evaporation of the refrigerant is promoted by lowering the pressure in the vacuum chamber 12. The refrigerant evaporated from the cooling pipe 7 is transferred to the peripheral wall of the decompression chamber 12, that is, the pipe wall 1.
At 0a, it is cooled by the cooling water 8 in the cooling water tank 6 and condensed. The refrigerant condensed on the pipe wall 10a is transferred to the decompression chamber 12.
It returns to the bottom of the cooling pipe 7, attaches again to the peripheral wall of the cooling pipe 7, and repeats the above-described operation.

In this way, the cooling pipe 7 efficiently absorbs the heat of the wire S using the latent heat of vaporization of the refrigerant, so the cooling efficiency is higher than that of conventional cooling devices, and even if the length of the cooling pipe 7 is short, The wire rod S is quickly cooled down to the temperature.

[Effects of the invention] As described above, the present invention divides the bottom of a cooling water tank into a vacuum chamber filled with a small amount of refrigerant, and passes through the vacuum chamber with a cooling pipe that partially contacts the refrigerant in the vacuum chamber. The heat transferred from the wire to the wall of the cooling pipe is efficiently absorbed by the latent heat of vaporization of cooling that adheres to the outer peripheral wall of the cooling pipe. The cooling speed is fast, and even though the cooling pipe is shorter than that of conventional cooling equipment, the cooling capacity is large and the floor space of the equipment is saved. In particular, since the cooling pipe is disposed in the reduced pressure chamber, evaporation of the refrigerant adhering to the wall of the cooling pipe is promoted.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a wire cooling device according to the present invention, and FIG. 2 is a side sectional view of a conventional wire cooling device. 5... Cooling device, 6... Cooling water tank, 7... Cooling pipe, 8... Cooling water, 10... Tube, 12... Decompression chamber, 13... Refrigerant.

Claims (1)

[Scope of utility model registration request] A decompression chamber filled with a small amount of refrigerant is divided at the bottom of the cooling water tank, a cooling pipe that partially contacts the refrigerant in the decompression chamber is provided through the decompression chamber, and the wire rod is passed through the cooling pipe. Cooling system.