JPH066751B2 - Cooling and sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention prevents the infiltration of outside air and the leakage of gas in the furnace at the outlet of the metal strip in the continuous heat treatment apparatus for the metal strip, and cools the metal strip. It relates to the device.

[Prior Art and its Problems] A cooling device shown in FIG. 3 is conventionally known as a cooling device for cooling a metal strip sent from a continuous heat treatment furnace through water. That is, in the illustrated apparatus, a water tank c is disposed opposite to the outlet b side of the heat treatment furnace a, and the metal strip d sent from the outlet b to the outside of the furnace a is rotated around the upper side of the support roll e by about 90 °. Then, after being introduced into the water tank c substantially directly below, the lower side of the turn roll f disposed in the water tank c is circulated and sent out of the water tank c. In the figure, k is a throat-shaped seal plate provided at the outlet e. According to such a cooling device, since the contact angle of the metal strip d orbiting the support roll e with the support roll is large, the frictional resistance therebetween becomes large, which may cause a flaw in the metal strip. Even if the meandering correction device is attached to the rolls after the support roll, this does not work effectively. Therefore, a meandering correction device having a seal structure has to be attached to the support roll e, which requires a large amount of equipment and has a drawback of increasing equipment cost. Further, since the meandering correction by this meandering correction device is performed by rotating the roll shaft of the support roll e to the left and right, an unreasonable force is applied to the metal strip d at that time, and wrinkles are formed especially in the case of a thin metal strip. There is also a drawback that permanent distortion occurs and quality is deteriorated. Further, when the metal strip d is set in the water tank c prior to the operation, the strip has to be largely curved, which makes the work difficult. There was also a problem.

On the other hand, in order to solve the above-mentioned drawbacks of the cooling device, Japanese Patent Application Laid-Open No. 56-139 which is a prior application by the applicant of the present application.
There is a device disclosed in Japanese Patent No. 629, which is a water tank c arranged opposite to the outlet b side of the heat treatment furnace a as shown in FIG.
The inlet b and the outlet wall on the side of the outlet b are provided with an introduction hole g and a lead-out hole h, respectively, and the metal strip d sent from the outlet b in the horizontal state is kept in the horizontal state from the introduction hole g to the water tank c. The water cooling device is designed to be guided inward and sent out of the water tank c through the outlet hole h. According to this water cooling device, it is not necessary to attach a meandering correction device as in the case of FIG. It is necessary to provide a set of seal rolls i, i, j, j and a driving device for the seal rolls i, i, j, j in the hole g and the lead-out hole h, respectively. Moreover, the water in the water tank c moves from the space between the seal rolls i, i to the furnace on the surface of the metal strip d. There was a problem that the operation of the furnace a was unstable because it was unavoidable to flow into the inside of a, and the deterioration of labor was accelerated. In the figure, m is a water receiver, P
Is a pump for returning the water that has fallen into the water receiver m to the water tank c.

[Means for Solving the Problems] In view of the above-mentioned conventional drawbacks, the present invention simplifies the equipment by eliminating the need for equipment such as seal rolls, and also the quality of wrinkles, distortion, etc. on the surface of metal strips. The purpose of the present invention is to provide a cooling and sealing device that eliminates the factor that hinders the operation, enables stable operation, and completely prevents the gas in the furnace from leaking out and the outside air from entering the furnace. In order to achieve the present invention, the metal strip is arranged so that the water tank is opposed to the outlet of the heat treatment furnace in which the metal strip is conveyed substantially horizontally, and a cooling liquid and a jet nozzle that blows downward are provided in the water tank,
At the outlet of the heat treatment furnace, at least a water tank and a seal plate leading to the spouting of the water are provided, and a fusible floater is provided on the outside of both tank walls of the water tank, respectively, and the metal strip extracted from the heat treatment furnace is provided on one side. After being floated on a futuristic floater, it is guided from one side edge of the water tank into the water tank to pass under the fountain port, and the metal strip is led out to the air from the other side edge of the water tank, and the other fuming method is used. It is characterized by being floated on a floater.

[Embodiment] FIG. 1 shows an embodiment of a metal strip continuous atmosphere heat treatment apparatus according to the present invention. In the drawing, 1 is a metal strip, 2 is heating and soaking, and 3 is sealing of an inlet portion of the heating and soaking. Rolls 4 are burners that serve as heat sources for heating and soaking, 5 are hot air blowing boxes for transporting the metal strip 1 in a floating state in the heating and soaking, and 6 is a fan for circulating atmospheric gas that serves as the hot air. Is. Numeral 7 is an outlet 8, 8 facing both sides of the metal strip 1 transferred from the heating and soaking zone 2.
Is a cooling zone for blowing out an atmospheric gas for cooling from the cooling zone, 9 is a fan for its circulation, and 10 is a cooler for cooling the gas. Further, 11 is a water tank arranged so as to face the outlet 12 of the heat treatment furnace. A circulation path 14 and a circulation pump 15 for supplying pressure to 13 are provided. Numerals 16 and 17 are fumarolic floaters provided outside the opposite side edges of the water tank 11, respectively. Further, 18 is a seal plate that shields a portion from the outlet 12 to the water tank 11, 19 is the outlet 12 to the fountain 13
It is a seal plate that shields the part up to. The blower 20 sucks gas from the portion surrounded by the seal plates 18 and 19 to one of the fusible floaters 16 near the outlet 12, and the gas is pumped. The other blower type floater 17 has a blower 21.
The atmosphere is pumped by. When the metal strip 1 is conveyed substantially horizontally in the heat treatment furnace, the metal strip 1 is first levitated by the gas blown from the futher type floater 16 and curved upward as shown in FIG. Is bent downward in the water tank 11 by the downward cooling liquid flowing into the water tank 11 and blown out from the fountain port 13, and then by the buoyant force of the other fumarolic floater 17 The air is led out from the side edge into the air, and is curved upward on the fumed floater 17.

A cooling liquid such as water is put into the water tank 11 according to its purpose, and the metal strip 1 thus extracted from the outlet 12 is shielded from the outside by the sealing plates 18 and 19 and the water seal of the water tank 11 to prevent outside air. To prevent the metal strip 1 from being oxidized and from losing heat.

[Effects of the Invention] As described above, the cooling / sealing device of the present invention can surely seal the metal strip by guiding the metal strip downward into the water tank that blows out the cooling liquid, and further, without contact, it is possible to prevent wrinkles and scratches. It is useful because it does not occur and enables high quality heat treatment.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a heat treatment apparatus showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a cooling / sealing apparatus of a main part thereof. 3 and 4 are vertical sectional views of a conventional device. 1 ・ ・ ・ Metal strip, 2 ・ ・ ・ Heating / uniform temperature, 7 ・ ・ ・ Cooling zone, 11 ・ ・ ・ Water tank, 12 ・ ・ ・ Exit, 13 ・ ・ ・ Fountain, 16,17
・ ・ ・ Fusing type floater, 18, 19 ・ ・ ・ Seal plate, 20, 21 ‥‥
Blower.

Claims (1)

[Claims] 1. A water tank is disposed so as to face an outlet of a heat treatment furnace in which metal strips are transported substantially horizontally, and a cooling water and a jet nozzle for blowing out downward are provided in the water tank, and the heat treatment furnace of the heat treatment furnace is provided. A seal plate is provided at the outlet, the tip of which extends to at least the water tank and the jet outlet, and each of the opposite tank walls of the water tank is provided with a blower type floater, and the metal strip extracted from the heat treatment furnace is placed on one of the blower type floaters. After being levitated, it is guided from one side edge of the water tank into the water tank and passes under the fountain port, and the metal strip is led out into the air from the other side edge of the water tank and floated on the other futuristic floater. A cooling and sealing device characterized in that