JPH0663456A - Liquid supply nozzle - Google Patents

Abstract

PURPOSE:To uniformize the flow velocity distribution in the lateral direction of a strip by allowing a large amount of a liquid to flow in a distributed state reduced in pulsation or vibration by providing taper slits and jet orifices having parallel gaps to arrange both of them in a spaced-apart state. CONSTITUTION:Liquid supply nozzles 2, 2' are divided into inside nozzle chambers 3, 3' and outside nozzle chambers 4, 4' by a double cylinder and liquid supply ports are provided on one end sides of the inside nozzle chambers 3, 3' and slits 7, 7' tapering from the parts of the liquid supply ports toward liquid discharge ports are provided to at least one places of the partition walls 5, 5' of the inside nozzle chambers 3, 3' and the outside nozzle chambers 4, 4'. Jet orifices 10, 10' having parallel gaps supplying a liquid from the outside nozzle chambers 4,4' to a passing plate part 13 are provided to be arranged so as to be kept away from the slits 7, 7'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid supply nozzle for supplying a liquid such as an acid liquid and a plating liquid to a plate-shaped surface from one direction.

[0002]

2. Description of the Related Art Liquid supply nozzles are used in various industrial fields such as supplying a liquid such as an acid liquid or a plating liquid to a plate-shaped surface. That is, a liquid supply nozzle for supplying a liquid such as an acid liquid or a plating liquid having a uniform flow velocity to a plate-shaped surface to be processed is disclosed in, for example, Japanese Patent Laid-Open No. 61-90860, as shown in FIG. Japanese Laid-Open Patent Publication No. 61-64897 discloses a liquid supply nozzle as shown in FIG.

[0003]

In order to perform highly efficient plating on a very thin strip having a material to be plated of about 0.1 mm in a plating tank, a large amount of liquid must be supplied. Further, the liquid flow must be in a rectified state in which liquid pulsation and vibration are extremely small. Further, the flow velocity distribution in the width direction of the strip must be uniform. However, in the conventional liquid supply nozzle, the rectification effect and the uniform flow velocity distribution effect were insufficient. The present invention has been made to solve the above problems,
It is an object of the present invention to provide a liquid supply nozzle in which a large amount of liquid is made into a liquid flow in a rectified state in which pulsation and vibration are extremely small and the flow velocity distribution in the width direction of the strip is uniform.

[0004]

SUMMARY OF THE INVENTION The gist of the present invention is to divide an inner nozzle chamber and an outer nozzle chamber into a double cylinder, and to provide a liquid supply port on one end side of the inner nozzle chamber, At least one place of the partition wall with the chamber is provided with a tapered slit that gradually decreases from the liquid supply port side to the counter liquid supply port side, and a jet port having a parallel gap for supplying liquid from the outer nozzle chamber to the plate passing portion is provided. The liquid supply nozzle is characterized in that the jet port and the slit are arranged apart from each other. A flow straightening plate is provided in the flow path of the outer nozzle chamber.

[0005]

1 is a side sectional view showing an embodiment of the present invention, FIG.
3 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a sectional view taken along the line BB of FIG. As shown in FIG. 1, the liquid supply nozzles 2 and 2 ′ are arranged on the front and back of the strip 1. The liquid is 2 as shown in FIG.
It is supplied from the liquid supply pipes 6, 6'of the place. The liquid supplied from the liquid supply port flows into the inner nozzle chambers 3, 3 '. The liquid that has flowed into the inner nozzle chambers 3 and 3 ′ collides with the end portion C of the inner nozzle chambers 3 and 3 ′ that is opposite to the liquid supply pipes 6 and 6 ′. Considering the static pressure distribution of, the static pressure on the side of the ends C and C ′ is necessarily higher than that on the liquid supply side.

The partition walls 5 and 5'on the outer surface side of the inner nozzle chambers 3 and 3'are provided with slits 7 and 7'toward the outer nozzle chambers 4 and 4 ', respectively, so that the liquid is stored in the outer nozzle chambers 4 and 4'. Spills towards. At this time, the slits 4 and 4 ′ are tapered in width from the end A to the end B. That is, since the liquid easily comes out from the end A and the liquid does not easily come out from the other end B, the liquid has a tapered shape to make the liquid flow uniform in the width direction.

The liquid flowing into the outer nozzle chambers 4 and 4'is blown out toward the strip 1 from the jet ports 10 and 10 'through the flow path of the outer nozzle chambers. At this time, a porous straightening plate 8 is provided in the flow path of the outer nozzle chamber to straighten the liquid flow.

The jet ports 10 and 10 'are provided with an angle θ toward the strip 1 to improve the liquid flow and at the same time suppress vibration and fluttering with respect to the strip 1. As described above, a uniform flow velocity distribution in the width direction of the nozzle can be obtained by the structural consideration of the nozzle and the balance of the static pressure distribution in the nozzle chamber.

That is, the inner nozzle chamber stores the primary pressure of the liquid, and the tapered shape of the slit makes the static pressure distribution in the width direction uniform, and further makes the static pressure distribution uniform while passing through the flow path of the outer nozzle chamber. At the same time, the liquid flow can be rectified. Here, in addition, the fact that the liquid is supplied in only one direction is a means for reducing the number of liquid pipes. FIG. 4 shows the flow velocity distributions of the conventional nozzle and the nozzle of the present invention, but they are not uniform. On the other hand, it was proved from the test results that the nozzles of the present invention were almost uniform when used.

[0010]

EXAMPLE Liquid supply nozzles 2 and 2'are arranged on the front and back of the strip 1. That is, this embodiment is for supplying liquid to both the front and back of the strip 1. Here, in order to make the description easier to understand, the liquid supply nozzle 2 will be mainly described. The liquid supply nozzle 2'has the same function.

The liquid supply nozzle 2 has a tank body 12 and a liquid seal 11
Are connected through. The liquid is supplied from a single liquid supply pipe 6 as shown in FIG. The liquid supplied to the liquid supply nozzle 2 from one liquid supply port flows into the inner nozzle chamber 3.

The size of the inner nozzle chamber 3 may be substantially the same as that of the liquid supply port. The liquid that has flowed into the inner nozzle chamber 3 collides with the end portion C of the inner nozzle chamber 3 that is opposite to the liquid supply pipe 6, and therefore, in consideration of the static pressure distribution in the inner nozzle chamber 3, the end portion is inevitable. The static pressure on the C side is higher than that on the liquid supply side.

The partition wall 5 on the outer surface side of the inner nozzle chamber 3 is provided with a slit 7 toward the outer nozzle chamber 4, and the liquid flows out toward the outer nozzle chamber 4. At this time, the slit 7 is widened in a taper shape from the end A to the end B. That is, the liquid easily flows out from the end A and the other end B
On the contrary, since it is difficult for the liquid to come out, a tapered shape is formed to make the liquid flow uniform in the width direction. At this time, the taper shape (width dimension) is about 10 mm at the A part of the slit and about 30 mm at the B part.
mm is suitable.

A plurality of porous straightening plates 8 are provided between the flow paths of the outer nozzle chamber 4 to impart a liquid straightening effect. Also,
The holding plate 9 holds the inner nozzle chamber 3 and the outer nozzle chamber 4 in place. In the embodiment, the holding plate is made porous to improve the liquid flow.

The liquid flowing into the outer nozzle chamber 4 is blown out from the jet port 10 toward the strip 1 through the flow path.
It is appropriate that the size ratio of the area between the inner nozzle chamber 3 and the outer nozzle chamber 4 is 1.0 to 1.5: 1.0. The direction of the jet port should be as parallel as possible to the strip 1 so as not to vibrate the strip 1, but there is a limit due to the structural restrictions.

Therefore, the jet port 10 is provided with an angle θ toward the strip 1 to improve the liquid flow and at the same time suppress the vibration to the strip 1. At this time, the angle θ is 15 °
~ 45 ° is suitable.

Although the embodiment has been described above, the present invention is not limited to blowing upwards with respect to the strip 1, but may be blown downwards with respect to the strip 1.
You can blow horizontally. Further, the liquid supply nozzle of the present invention can be sufficiently used not only in plating but also in an apparatus for performing operations such as pickling and degreasing.

The present invention has been described above with reference to the drawings. However, the present invention is not limited to this, and the design can be changed according to the purpose of the liquid supply nozzle, and, of course, it deviates from the scope of the present invention. is not.

[0019]

According to the present invention, firstly, when liquid is supplied to a very thin strip having a material to be plated of about 0.1 mm, wrinkles and breaks do not occur in the strip, and pulsation and vibration are very small. It can be a liquid flow in a rectified state. Secondly, it is possible to make uniform the flow velocity distribution in the width direction of the strip, which is necessary when the plating thickness is performed under strict control standards.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a chart of the flow velocity distribution of the nozzle of the present invention and the prior art.

FIG. 5 is an explanatory diagram of a conventional nozzle.

6A and 6B are explanatory views of another conventional liquid supply nozzle, FIG. 6A is a side view, and FIG. 6B is a sectional view taken along line CC.

[Explanation of symbols]

 1 strip 2,2 'liquid supply nozzle 3,3' inner nozzle chamber 4,4 'outer nozzle chamber 5,5' outer partition wall 6,6 'liquid supply pipe 7,7' slit 8 straightening plate 9 holding plate 10, 10 'Jet port 11 Liquid seal 12 Tank body 13 Plated part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaharu Sanada 46-59 Nakahara, Tobata-ku, Kitakyushu City Nippon Steel Corporation Machinery & Plant Division

Claims (2)

[Claims] 1. An inner nozzle chamber and an outer nozzle chamber are divided by a double cylinder, a liquid supply port is provided at one end side of the inner nozzle chamber, and at least one position of a partition wall between the inner nozzle chamber and the outer nozzle chamber is provided. A tapered slit that gradually decreases from the liquid supply port side to the counter liquid supply port side is provided, and a jet port having a parallel gap for supplying liquid from the outer nozzle chamber to the plate portion is provided, and the jet port and the slit are kept away from each other. A liquid supply nozzle characterized by being arranged. 2. The liquid supply nozzle according to claim 1, wherein a flow straightening plate is provided in the flow path of the outer nozzle chamber.