JPH11158593A - Floating-up pot in air in hot dipping equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating-up pot in the air of a hot dipping equipment with which the molten plating metal in the inner part is always renewed without staying. SOLUTION: In the floating-up pot 10 in the air in which a bottom opening part 12 is formed by holding the molten plating metal 101 in the inner part with the action of a horizontal magnetic field impressed with an induction magnetic field impressing device 11, a steel strip 100 is passed toward an upper opening part 13 from the bottom opening part 12 and also, the molten plating metal 101 is supplied by spouting toward this steel strip 100 from the spouting hole 14a of a supplying nozzle 14, the spouting hole 14a of the supplying nozzle 14 is extended to near the bottom opening part 12 by forming an inclining part 14b inclined to the direction toward the bottom opening part 12 at the lower edge end of the spouting hole 14a of the supplying nozzle 14 so as to be able to spout the molten plating metal 101 toward the horizontal direction and the bottom opening part 12 side (diagonally downward) to the surface of the steel strip 100 and then, the molten plating metal 101 near the bottom opening part 12 is made to flow without staying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a levitating pot of a hot-dip plating facility capable of plating an object without providing a mechanical mechanism in a plating bath.

[0002]

2. Description of the Related Art In recent years, a floating pot capable of plating an object without providing a mechanical mechanism in a plating bath in a hot dip plating facility has been developed. This levitating pot holds a hot-plated metal (eg, zinc) inside by applying a magnetic field to the lower part so that the object (eg, steel strip) can pass from the lower part to the upper part. ing. FIG. 2 shows a schematic structure of a main part of such a levitating pot.

[0003] As shown in FIG.
The internal hot-dip metal 10 is formed by the electromagnetic force generated by the action of the horizontal magnetic field applied by both high-frequency magnetic field applying devices 21.
1 is held so as not to leak from the bottom opening 22, and the strip 100 whose traveling direction has been changed upward by the deflector roll 31 is passed from the bottom opening 22 to the upper opening 23, and the temperature and the composition are controlled. By continuously discharging and supplying the adjusted hot-dip metal 101 from both supply nozzles 24 to the vicinity of the surface of the strip 100, the strip 100 is continuously plated, and the slit nozzle above the upper opening 23 is provided. By injecting gas from both sides to both surfaces of the steel strip 100, the extra hot-dip coated metal 101 adhering to the surface of the steel strip 100 is scraped off evenly, and the plating layer formed on the surface of the steel strip 100. Can be adjusted in thickness. In addition, in FIG. 2, 25 is
This is a discharge path for discharging the hot-dip plated metal 101 used for plating the steel strip 100.

[0004]

In the above-mentioned levitating pot 20, the steel strip 100 which travels and moves in the vertical direction is used.
Since the hot-dip plating metal 101 is horizontally discharged and supplied from the supply nozzle 24 to the surface of the steel plate, as shown in FIG. 3, a dynamic pressure 101a is generated at a collision portion between the discharged hot-dip metal 101 and the strip 100, The flow of the hot-dip metal 101 toward the discharge path 25 between the dynamic pressure 101a and the bottom opening 22 is blocked. For this reason, the bottom opening 22
The hot-dip metal 101 in the vicinity is hard to be renewed, and the temperature and composition of the hot-dip metal 101 in the relevant portion are likely to be different from those in the other portions. In some cases, plating cannot be performed.
Further, the hot-dip plating metal 101 near the bottom opening 22 is provided.
The function of discharging the dross generated therein to the discharge path 25 cannot be maintained, and the dross sometimes adheres to the belt 100.

In view of the above, an object of the present invention is to provide an air floating pot of a hot-dip plating facility that can always renew the hot-dip coated metal therein without stagnation.

[0006]

In order to solve the above-mentioned problems, a levitating pot of a hot-dip plating facility according to the present invention forms a bottom opening by holding a hot-dip plating metal inside in a horizontal magnetic field, In the levitating pot of the hot-dip plating facility, which passes the object upward from the bottom opening and discharges and supplies the hot-dip plating metal from the discharge port of the supply nozzle toward the target, the bottom opening The discharge port of the supply nozzle is extended to the vicinity of the bottom opening so that the hot-dip metal in the vicinity of the portion flows without stagnation.

[0007] In the above-mentioned levitating pot of the hot-dip plating equipment, a lower edge of the discharge port of the supply nozzle is inclined in a direction toward the bottom opening.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air floating pot of a hot-dip plating facility according to the present invention will be described with reference to FIG. FIG. 1 is a schematic structural view of the main part.

In FIG. 1, reference numeral 11 denotes a high-frequency magnetic field applying device, which is provided in a pair at the bottom of the levitating pot 10 so as to form a bottom opening portion 12, and is provided with an electromagnetic force by the action of a horizontal magnetic field to be applied. Internal hot-dip plating metal 10
1 can be held so as not to leak from the bottom opening 12, and the running direction of the steel strip 1, the running direction of which is changed upward by the deflector roll 31 disposed below, is increased.
00 can be received from the bottom opening 12. Reference numeral 13 denotes an upper opening, from which the steel strip 100 received from the lower opening 12 can be sent upward.

Reference numeral 14 denotes a supply nozzle, which is provided in pairs so as to discharge and supply the hot-dip metal 101 to both sides of the steel strip 100. At the lower edge of the discharge port 14a of the supply nozzle 14, the discharge port 14a
Is formed so as to increase the opening area toward the front end. That is, the supply nozzle 14
Has an inclined portion 14b in which the lower edge of the outlet 14a is inclined in the direction toward the bottom opening 12 so as to expand the outlet 14a to the vicinity of the bottom opening 12, and travels vertically. The hot-dip metal 101 can be discharged to the surface of the steel strip 100 in the horizontal direction and toward the bottom opening 12 (obliquely downward).

Reference numeral 15 denotes a discharge passage, which is capable of discharging the hot-dip metal 101 used for plating the steel strip 100. Reference numeral 16 denotes a slit nozzle, which is arranged in a pair above the upper opening 13 so as to sandwich the steel strip 100 sent out from the upper opening 13 and injects gas onto the surface of the steel strip 100. You can do it.

In such a levitating pot 10, the hot-dip metal 101 inside is held by the electromagnetic force generated by the action of the horizontal magnetic field applied by both high-frequency magnetic field applying devices 11 so as not to leak from the bottom opening 12. The strip 100 whose traveling direction has been changed upward by the deflector roll 31 is passed from the bottom opening 22 to the top opening 23, and the temperature and composition of the hot-dip coated metal 101 are adjusted.
From the discharge ports 14a of both supply nozzles 14
By constantly discharging and supplying near the surface of the steel strip,
00 is continuously plated, and gas is jetted from the slit nozzle 26 above the upper opening 23 to both surfaces of the steel strip 100, so that extra hot-dip plated metal 101 adhering to the surface of the steel strip 100 is removed. The thickness of the plating layer formed on the surface of the steel strip 100 is adjusted while the scraping is performed uniformly.

Here, since the inclined portion 14b is formed at the discharge port 14a of the supply nozzle 14, the hot-dip plating metal 1 discharged from the discharge port 14a of the supply nozzle 14 is formed.
01 is horizontal to the surface of the strip 100 traveling and moving in the vertical direction and on the side of the bottom opening 12 (obliquely downward).
Is discharged toward the bottom opening 1
The hot-dip plated metal 101 in the vicinity of 2 is constantly renewed without stagnation of the flow.

Therefore, the composition of the hot-dip metal 101 near the bottom opening 12 is different from that of the hot-dip metal 10 in other portions.
Since there is no difference from the composition of No. 1, the strip 100 can be plated with the adjusted hot-dip metal 101 and the dross discharging function can be maintained.

[0015]

The floating pot of the hot-dip plating equipment according to the present invention forms a bottom opening by holding the hot-dip metal inside by a horizontal magnetic field, and passes an object upward from the bottom opening. In addition, the hot-dip plating metal whose temperature or composition has been adjusted is discharged from the discharge port of the supply nozzle toward the object and supplied in the air-floating pot of the hot-dip plating equipment, wherein the hot-dip plating near the bottom opening is provided. Expanding the discharge port of the supply nozzle to near the bottom opening so that the metal flows without stagnation,
By discharging the hot-dip plating metal from the discharge port of the supply nozzle toward the vicinity of the bottom opening, the hot-dip metal having a controlled temperature and composition can always be supplied to the vicinity of the bottom opening. As a result, the composition of the hot-dip metal in the vicinity of the bottom opening does not differ from the composition of the hot-dip metal in the other portions, and the object can be plated with the adjusted hot-dip metal.

Further, by increasing the opening area of the discharge port of the supply nozzle toward the front end side, the flow velocity of the hot-dip galvanized metal discharged from the discharge port of the supply nozzle is reduced to stand at a collision portion with the object. Since the dynamic pressure can be kept low, the hot-dip metal in the vicinity of the bottom opening always flows out toward the discharge port without stagnation, and renewal of the hot-dip metal is promoted. As a result, it is possible to maintain the dross discharge function of discharging dross generated in the hot-dip metal in the vicinity of the bottom opening to the discharge path, so that it is possible to reduce the adhesion of dross to the object.

[Brief description of the drawings]

FIG. 1 is a schematic structural view of a main part of an embodiment of a levitating pot of a hot-dip plating facility according to the present invention.

FIG. 2 is a schematic structural view of a main part of a conventional levitating pot of a hot-dip plating facility.

FIG. 3 is an explanatory view of a problem of a conventional floating levitating pot.

[Explanation of symbols]

 Reference Signs List 10 levitating pot 11 high-frequency magnetic field applying device 12 bottom opening 13 top opening 14 supply nozzle 14a discharge port 14b inclined part 15 discharge path 16 slit nozzle 31 deflector roll 100 steel strip 101 hot-dip coated metal

Continuation of the front page (72) Inventor Yasuo Fukada 4-6-22 Kanonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Kenichi Unoki 4-6-1 Kanonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima No.22 Mitsubishi Heavy Industries, Ltd.Hiroshima Research Laboratory (72) Inventor Chiaki Kato 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefecture Kawasaki Steel Engineering Co., Ltd. (72) Inventor Toshiaki Amagasa, Kawasaki-cho, Chuo-ku, Chiba-shi No. 1 Kawasaki Steel Corporation Chiba Works (72) Inventor Kazuaki Hosomi 5th Ishizu Nishimachi, Sakai City, Osaka Prefecture Nisshin Steel Co., Ltd.Technical Research Institute (72) Inventor Yasutaka Kawaguchi 5th Ishizu Nishimachi Sakai City, Osaka Prefecture Sun New steelmaking company Sakai Works

Claims (2)

[Claims] 1. A bottom opening is formed by holding a hot-dip metal inside by a horizontal magnetic field, and an object is passed upward from the bottom opening and a supply nozzle is directed toward the object. In the levitating pot of the hot-dip plating equipment that discharges and supplies the hot-dip plating metal from the discharge port, the discharge port of the supply nozzle is connected to the bottom portion so that the hot-dip metal near the bottom opening flows without stagnation. An air-floating pot for hot-dip galvanizing equipment that has been extended to the vicinity of the opening. 2. The levitating pot according to claim 1, wherein a lower edge of the discharge port of the supply nozzle is inclined in a direction toward the bottom opening.