JP2808463B2 - Bath floater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bath used in hot-dip galvanizing equipment, annealing and pickling equipment, etc., instead of a roll in a hot-dip zinc bath or a molten salt bath. For medium floaters.

[Conventional technology]

In hot-dip galvanizing equipment, annealing and pickling equipment, in-bath rolls of molten zinc and molten salt are trying to replace non-contact type in-float floaters in order to avoid scratching the product surface. FIG. 9 is a longitudinal sectional front view showing an example of a conventional in-bath floater, and FIG. 10 is a longitudinal sectional side view taken along line XX in FIG. The in-bath floater includes a pump 2 and a floater 1. Dissolved zinc or molten salt (hereinafter, referred to as liquid 5) is sucked from a suction port 2a by a pump impeller 3 and sent to a pressure chamber 1a. The bottom of the pressure chamber 1a is formed by a cylindrical surface having a horizontal axis, and the liquid pressurized by the pump 2 is ejected at high speed from a large number of outlets 1b provided on the bottom cylindrical surface to form a strip 4 Collide with The strip 4 is held by the liquid pressure in the gap between the outlet 1b (bottom cylindrical surface) and the strip collision surface, and runs in a non-contact state. The liquid ejected into the bathtub 6 is supplied to the floater 1 again by the pump 2.

[Problems to be solved by the invention]

In an actual production line, strips having different widths are continuously passed. In the above-mentioned conventional in-bath floater structure, the floater width and the distribution range width (strip width direction) of the outlet for discharging the liquid are determined at the maximum strip width specified for the equipment.

However, when a narrow strip passes through the floater, the outlets at both ends of the bottom cylindrical surface of the floater that are not covered by the strip are jetting out as an invalid flow rate in a state where the liquid is blown through. Thus, if the pump load is constant, the pressure in the pressure chamber will decrease, and thus the pressure between the bottom cylindrical surface (outer surface) of the floater and the inner surface of the strip. Then, the flying height of the strip is significantly reduced, and the strip comes into contact with the floater. Therefore, conventionally, the pump load, that is, the flow rate has been increased to cope with this. Therefore, a large flow pump was required, the operating power was large, and the cost was high.

[Means for solving the problem]

In order to solve the above-mentioned conventional problems, the present invention provides a method of causing a pressurized liquid to be spouted at high speed from a plurality of outlets provided at the bottom of a pressure chamber having a bottom formed by a horizontal cylindrical surface. In the above-mentioned in-bath floater, the inside of the pressure chamber is divided into a plurality of compartments by partitions along the axial direction, and the partition has an openable and closable communication hole. Things.

(Operation)

In the present invention, the pressure chamber is divided into a plurality of parts by partition walls, and by opening and closing communication holes provided in the partition walls, the distribution range width of the effective liquid outlet on the bottom cylindrical surface of the floater is set to the plate width of the strip. And the invalid liquid flow rate can be eliminated.

〔Example〕

FIG. 1 is a longitudinal sectional front view showing a first embodiment of the present invention, and FIG.
The figure is a longitudinal side view taken along the line II-II in FIG. 1, FIG. 3 is a longitudinal front view showing a state different from the above in the embodiment,
FIG. 4 is a vertical sectional front view taken along line IV-IV in FIG.
In these figures, the same parts as those in the prior art described with reference to FIGS. 9 and 10 are denoted by the same reference numerals to avoid redundancy, and detailed description is omitted.

In this embodiment, the inside of the pressure chamber 1a is divided into a plurality of compartments 8a by partition walls 7a along the cylindrical axis direction (the width direction of the strip 4). A communication hole 9a is formed in the partition wall 7a. The communication hole 9a is provided with a shaft 11 penetrating the blocking hole 10a and the upper part of the floater 1a and a pneumatic or hydraulic cylinder.
The opening and closing mechanism is composed of 12 and can be opened and closed freely. The overall structure is left-right symmetric.

1 and 2 show a state in which a strip 4 of the maximum specification width of this equipment is being passed. In this case, the liquid 5 sent by the impeller 3 is blown out of the center of the floater 1a from the outlet 1b in the center as it is, and is sent to each compartment 9a sequentially through the communication holes 8a near the left and right ends, It gushes from the outlet 1b.

3 and 4 show a situation in which a strip narrower than the above is passed. In this case, since the communication holes 9a of the left and right compartments 8a are closed by the closing plates 10a, the pressurized liquid does not squirt from the outlets 1b at both ends which are not covered by the strip 4, and therefore, the wasteful flow Losses are avoided.

Next, FIG. 5 is a vertical sectional front view showing a state in which a wide strip is passed in the second embodiment of the present invention, FIG. 6 is a vertical sectional side view taken along line VI-VI of FIG. FIG. 7 is a vertical sectional front view showing a state in which a narrow strip is also passed, and FIG. 8 is a vertical sectional side view taken along line VIII-VIII in FIG. Also in these figures, the same parts as those described above are denoted by the same reference numerals, and detailed description is omitted.

In this embodiment, as in the first embodiment, the inside of the pressure chamber 1a is divided into a plurality of compartments 8b by a partition wall 7b along the direction of the cylinder axis. 7b is not provided near the cylinder axis,
The compartment 8b is formed only near the inner surface of the cylinder. Communication hole 9b
Is opened and closed by a stopper 10b, a shaft 11, and a cylinder 12.

FIG. 11 is a diagram showing the relationship between the width of the strip to be passed and the pump power (liquid flow rate). In the case where the width of the strip is narrow, an invalid flow rate has conventionally been ejected from the outlets at both ends of the floater. Therefore, it is necessary to increase the pump load to compensate for the pressure drop in the pressure chamber. In the present invention, since this useless flow ejection is eliminated, the pump power can be reduced if the width of the strip is small.

〔The invention's effect〕

In the present invention, since the pressurized liquid can be ejected only from the effective outlet of the floater in accordance with the width of the strip to be passed, the pump can be reduced in size, and the equipment cost can be reduced. Also, the power cost for operating the pump is reduced.

[Brief description of the drawings]

1 is a vertical front view showing a first embodiment of the present invention, FIG. 2 is a vertical side view taken along the line II-II in FIG. 1, and FIG. 3 shows a state different from the above in the same embodiment. FIG. 4 is a vertical sectional front view taken along line IV-IV in FIG. FIG. 5 is a longitudinal sectional front view showing a second embodiment of the present invention, FIG. 6 is a longitudinal side view taken along line VI-VI of FIG. 5, and FIG. 7 is a longitudinal section showing a state different from the above in the embodiment. FIG. 8 is a longitudinal sectional side view taken along line VIII-VIII in FIG. Ninth
The figure is a longitudinal sectional front view showing an example of a conventional in-bath floater, and FIG.
The figure is a longitudinal sectional side view taken along line XX in FIG. Eleventh
The figure shows the relationship between the width of the strip to be passed and the pump power (liquid flow rate). 1 Floater, 1a Pressure chamber, 1b Outlet, 2 Pump, 2a Suction port, 3 Impeller, 4 Strip, 5 Liquid, 6 Bath tub, 7a, 7b ... partition wall, 8a, 8b ... compartment, 9a, 9b ... communication hole, 10a ... closing plate, 10b ... plug, 11 ... shaft, 12 ... cylinder.

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Susumu Kamikawa 4-6-22 Kannonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Yukihiro Iida 1 Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture Chome (without address) Inside Mizushima Works, Kawasaki Steel Corporation (72) Inventor Tetsuya Kiyasu 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (without house number) Inside Mizushima Works, Kawasaki Steel Corporation (56) -263960 (JP, A) JP-A-2-34760 (JP, A) JP-A-1-136160 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C23C 2/00- 2/40 C23G 3/02

Claims (1)

(57) [Claims] 1. A bath floater in which a pressurized liquid is ejected at high speed from a plurality of outlets provided at the bottom of a pressure chamber having a bottom formed by a horizontal cylindrical surface. A floater in a bath, wherein the inside of the chamber is divided into a plurality of compartments by a partition along the axial direction, and the partition has a communication hole which can be opened and closed.