JPS5848656A - Nozzle header for continuous hot dipping device - Google Patents

Abstract

PURPOSE:To facilitate removal work for dross by providing plural injection nozzles, and making the nozzles usable respectively independently by rotation of hollow supporting cylinders. CONSTITUTION:A titled header is constituted of inside cylinders 7 which are connected at one end of hollow supporting cylinders 2 and have plural gas passing holes 8 in two rows, concentrical outside cylinders 9 which are provided so as to cover the holes 8 on the outside circumferences thereof and are closed at both ends, partition plates 10 which divide the spaces between the inside and outside cylinders, injection nozzles 3 which are provided in the space parts of the respective outside cylinders 9 partitioned by the plates 10, and flow rate regulating valves 11 which regulate the flow rates of the gases supplied from the cylinders 7. Thus the desired nozzles 3 can be selected by rotating the cylinders 2. Therefore, there is no need for stopping the operation even when the injection nozzles go out of order.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle header for a continuous hot-dip plating apparatus, and particularly to a nozzle header for a continuous hot-dip plating apparatus, which is equipped with a gas injection nozzle for spraying a wiping gas onto the surface of a copper strip to be plated. This invention relates to an improvement in a nozzle header that is integrally constructed.

First, the prior art will be explained using FIG. 1. 1st
The figure is a schematic structural explanatory diagram of a continuous melting device proposed by the applicant of the present invention in Japanese Patent Laid-Open No. 55-148753. In FIG. 1, a nozzle ladder 1 is connected to one end of a hollow support tube 2 that also serves as a gas supply pipe, and in order to uniformly supply pressurized gas to the gas injection nozzle 3 in the width direction of the nozzle 30, the nozzle The header 1 is formed into a fan shape that widens toward the end, and gas is guided from the hollow support front 2 to the center of the ladder 1 to the nozzle via a bent pipe 4. However, in the configuration shown in Figure 1,
Since the bent pipe 4 is located close to the liquid surface of the hot-dip plating liquid tank 5, there is a problem that the bent pipe 4 becomes an obstacle when removing dross (oxide) floating on the liquid surface. Also,
When the gas injection nozzle 3 needs to be replaced due to clogging or damage to the injection port of the nozzle 3, replace the gas injection nozzle 3.
It is not integrated with the nozzle header 1, the hollow support cylinder 2, and the bent pipe 4. During this time, the line must be stopped. However, in continuous hot-dip plating equipment, if the line is stopped midway through operation, a considerable amount of parts will be left unfinished. That is, since this significantly impedes productivity, there is a need for a nozzle header that can prevent productivity from decreasing due to sudden clogging or damage to the nozzle injection port.

To address this problem, there is a rotary injection nozzle proposed by the applicant of the present invention in Japanese Utility Model Application Publication No. 53-58924. In this system, a plurality of gas injection nozzles are extended radially around the outer periphery of a cylindrical nozzle header whose both ends are pivotally supported to rotate around the cylindrical center. The gas injection nozzle is rotated to select and use one gas injection nozzle from among a plurality of gas injection nozzles that injects pressurized gas toward the strip.

However, the nozzle header is just a single cylindrical nozzle header, and when the pressurized gas passes through it and flows out from the gas injection nozzle, the state of the pressurized gas (flow rate There are no measures in place to equalize the pressure. Therefore, there is a problem in that it is difficult to uniformly plate the strip across its width.

The present invention has been made in view of the above, and its purpose is to facilitate the removal of dross,
Moreover, it is an object of the present invention to provide a nozzle header for a continuous hot-dip plating device that can reduce the decrease in productivity when a sudden failure occurs in a gas injection nozzle, and can also ensure sufficient performance. be.

A feature of the present invention is that an inner cylinder provided with a plurality of gas passage holes in at least two rows in the axial direction of the side wall is connected to one end of the hollow support cylinder for supplying pressurized wiping gas, and the outer circumference of the inner cylinder is An outer cylinder concentric with the inner cylinder with both ends closed so as to cover all of the plurality of gas passage holes is provided, and a space between the outer cylinder and the inner cylinder is used for the passage of the plurality of gases in each row. A space including a hole is divided by a partitioning means, and a blowing gas is blown onto the plated surface of the plate-like member into a portion of the outer cylinder in each space partitioned by the partitioning means in the axial direction of the inner cylinder. An extending gas injection nozzle is provided, and a flow control valve for adjusting the flow rate of the wiping gas supplied from the inner cylinder is provided in each of the gas passage holes, and the injection is performed at the same time as the inner cylinder rotates. The nozzle can be rotated to select one gas injection nozzle from among the plurality of gas injection nozzles that sprays the wiping gas onto the plated surface of the plate-shaped member;
Moreover, the present invention has a structure in which the wiping gas can be uniformly injected over the longitudinal direction of the gas injection nozzle.

The present invention will be explained in detail below using the embodiments shown in FIGS. 2 and 3.

Fig. 2 is a plan view showing a simple embodiment of the nozzle header of the present invention, and Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2. For example, a strip such as a copper strip is blown with wiping gas from both sides. The illustration shows a pair of left and right sides that can be used. In FIG. 2, numeral 5 denotes a hot-dip plating liquid droplet, and 6 a nozzle header for supplying pressurized wiping gas to the gas injection nozzle 3, which is connected to one end of the hollow support tube 2 which also serves as a wiping gas supply pipe.

Then, pressurized wiping gas is supplied from the direction of the arrow shown in the figure, passes through the hollow support cylinder 2, flows into the nozzle header 6, and is supplied to the gas injection nozzle 3.

By the way, the nozzle header 6 has a Sakaki structure as shown in FIG. A plurality of gas passage holes 8 are provided in two rows in each direction. Reference numeral 9 denotes an outer cylinder that is integrally provided on the outer periphery of the inner cylinder 7 so as to cover all the gas passage holes 8, and has both ends concentrically closed with the inner cylinder 7, and the space between the inner cylinder 7 and the outer cylinder 9 is as follows: It is divided by a partition plate 10 into two spaces including a plurality of gas passage holes 8 in each row,
A gas injection nozzle 3 extending in the axial direction is provided so as to face a portion of the outer cylinder 9 in each space. Further, each gas passage hole 8 is provided with a flow rate adjustment valve 11 for adjusting the flow rate of the wiping gas supplied from inside the inner cylinder 7. Note that the flow rate regulating valve 11 on the side that is not in operation is closed so that the wiping gas is not ejected from the gas injection nozzle 3 on that side.

In FIG. 3, the pressurized wiping gas that has been supplied into the inner cylinder 7 and passed through the gas passage hole 8 flows as shown by the arrow in the figure.
The gas is ejected from the gas injection nozzle 3 and wipes off the excess plating film on the surface of the strip 12 to be plated. Incidentally, while the wiping gas passes through the space 13 formed by the inner cylinder 7 and the outer cylinder 8, the flow of the gas is expanded in the width direction and rectified in the longitudinal direction of the gas injection nozzle 3. However, if this rectifying effect is not sufficient and the gas flow is uneven in the entire area of the gas injection nozzle 3, the flow rate regulating valve 11 provided at each gas passage hole 8 is appropriately adjusted to achieve uniformity.

If the gas injection nozzle 3 in operation suddenly becomes clogged or damaged, and it becomes necessary to replace the gas injection nozzle 3, connect the nozzle header 6 to the hollow The support tube 2 is rotated 180 degrees and the gas injection nozzle 3 on the reflection side is used to resume wiping. At this time, the flow rate adjustment valve 11 is adjusted so that the wiping gas does not flow into the gas injection nozzle 3 to be replaced, but flows only into the gas injection nozzle 3 that performs wiping.

According to the embodiment of the present invention described above, the curved pipe 4
(See Figure 1), the space near the liquid surface is expanded, making it easier to remove dross and improving workability. In addition, since two gas injection nozzles 3 are provided and each can be used independently, if a sudden problem occurs with the gas injection nozzle 3 in use, the hollow support cylinder 2 can be rotated 1800 times. It is only necessary to switch to using another gas injection nozzle 3, and the decrease in productivity can be significantly reduced compared to the conventional method. Furthermore, since the flow can be made uniform over the entire area of the gas injection nozzle 3, performance similar to that shown in FIG. 1 can be ensured.

In the above-mentioned embodiment, two gas injection nozzles 3 are provided, but it is also possible to use only one gas injection nozzle 3 if the purpose is simply to facilitate the dross removal work, or the gas injection nozzle 3 may be used multiple times. The number may be two or more in order to deal with any malfunctions.

As explained above, according to the present invention, it is possible to easily perform the dross removal work, and to reduce the decrease in productivity when a sudden failure occurs in the gas injection nozzle. In general, this has the effect of ensuring sufficient performance.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional nozzle header, Fig. 2 is a plan view showing an embodiment of the nozzle header of the continuous hot-dip plating apparatus of the present invention, and Fig. 3 is a sectional view taken along the line A-A in Fig. 2. be. 2...Hollow support tube, 3...Gas injection nozzle, 6...
・Nozzle header, 7... Inner cylinder, 8... Gas passage hole,
9... Outer cylinder, 10... Partition plate, 11... Flow rate adjustment valve, 12... Strip No. 1 Figure 'f-2'

Claims (1)

[Claims] 1. At one end of the hollow support cylinder for supplying pressurized wiping gas, a gas injection nozzle extending in the axial direction of the hollow support cylinder is provided, which is arranged in 5 pairs and sprays the wiping gas onto the surface to be plated of the plate-shaped member. A nozzle for a continuous hot-dip plating apparatus, in which a ladder is provided with an inner cylinder provided with a plurality of gas passage holes in at least two rows in the axial direction of the connected misaligned side wall at one end of the hollow support cylinder; ::, an outer cylinder concentric with the inner cylinder with both ends closed, and a space between the outer cylinder and the inner cylinder in each row. partitioning means dividing the space into a plurality of spaces including a plurality of gas passage holes; and the gas injection nozzle provided in each of the outer cylinder portions of the respective spaces partitioned by the partitioning means; The method includes a flow rate adjustment valve that adjusts the flow rate of the wiping gas supplied from the inner cylinder provided in the hole, and rotates the gas injection nozzle at the same time as the hollow support cylinder rotates to inject the plurality of gases. A nozzle header for a continuous hot-dip plating apparatus, characterized in that one gas injection nozzle for spraying the wiping gas onto the plated surface of the plate member can be selected from among the nozzles.