KR940005302Y1 - Air knife device for removing hot water - Google Patents

Abstract

No content.

Description

Air Knife Device for Hot Water Removal

1 is a cross-sectional view showing the configuration of a post-treatment apparatus of a zinc plating apparatus according to the prior art.

2 is a cross-sectional view showing the configuration of a post-processing device equipped with an air knife device according to the present invention.

3 is a block diagram of an air knife device according to the present invention.

4 is a cross-sectional view taken along the line AA ′ of FIG. 3.

* Explanation of symbols for main parts of the drawings

10a, 10b: Air spray unit 15a, 15b: Guide

16a, 16b: large cutout 20a, 20b: air supply pipe

25a, 25b: knife type spray nozzle 26a, 26b: adjusting rod

100: post-processing device 120: hot water spray room

F: Fiexible tube

The present invention relates to a device for removing hot water injected from the post-treatment apparatus during the manufacture of galvanized steel sheet, and more specifically, to remove hot water by using the injection pressure of air, zinc in the state of removing hot water The present invention relates to an air knife (Air Knife) device, which is rotated to move away from a plated steel sheet to prevent contact between a galvanized steel sheet and a spray nozzle.

In general, the post-treatment apparatus 100 of the galvanized steel sheet production equipment is equipped with an alkaline solution injection chamber 110 and a hot water spray chamber 120 on the downstream side thereof, followed by chrome (the hot water spray chamber 120). Chrome) solution spray chamber 130 is located, the dryer 140 is finally located. Galvanized steel sheet (S) is passed through the skin pass mill (Skin Pass Mill) (not shown) and then the alkaline solution spray chamber 110 of the after-treatment apparatus 100 to remove the wet oil (Wet Oil) used in the temper rolling mill In the alkaline solution injection chamber 110, the alkali solution is uniformly applied to the upper and lower surfaces of the galvanized steel sheet (S) by the alkaline solution circulation pump 115, the alkali solution is galvanized steel sheet ( Most of the alkali solution is removed by a plurality of pairs of ringer rolls R before S) leaves the alkaline solution injection chamber 110. However, some of the remaining alkaline solution is washed by spraying hot water on the front and rear of the galvanized steel sheet S by the hot water circulation pump 125 in the hot water spraying chamber 120, where most of the alkali solution is removed. . In addition, the galvanized steel sheet (S) is also removed by the plurality of Ringer roll (R) before leaving the hot water spray chamber 120, and then enters the chromium solution spray chamber 130. In the chromium solution injection chamber 130, a chromium (CrO ₃ ) film is formed by coating a chromium solution on the front and rear of the galvanized steel sheet (S) by the chromium solution circulation pump 135, and finally the dryer 140 Through the galvanized steel sheet (S) of the finished product will be produced. However, in the series of post-treatment as described above, the galvanized steel sheet (S) must be completely removed from the hot water spray chamber 120, and then enter the chromium solution spray chamber 130, but the galvanized steel sheet (S) ), The thickness of each step was different, and as the hardness and roughness of the ringer roll R were changed, hot water adhered to the galvanized steel sheet S could not be effectively removed. Therefore, the problem that the concentration of the chromium solution is lowered, the zinc (Zn) content is increased, and the pH of the chromium solution is increased due to the incorporation of hot water into the chromium solution increases.

In order to solve the above problems, an apparatus for removing hot water by an injection pressure of air has been proposed. This removes the hot water attached to the upper and lower surfaces of the galvanized steel sheet entering the chromium solution spray chamber from the hot water spray chamber by air pressure to prevent the concentration of the chromium solution from decreasing and does not contaminate the chromium solution. I will not give. However, in the conventional air knife device, since the position of the injection nozzle is fixed, the injection nozzle is arranged adjacent to the galvanized steel sheet even when the air injection operation is not performed. Therefore, even a small looping portion of the galvanized steel sheet hits the nozzle and not only damages the spray nozzle but also damages the galvanized steel sheet.

The present invention is to solve the conventional problems as described above to effectively remove the hot water attached to the upper and lower surfaces of the galvanized steel sheet entering the chromium solution injection chamber from the hot water spray chamber to prevent the concentration of the chromium solution of course, At the end of the air spraying operation, the distance between the spray nozzle and the galvanized steel sheet is kept large to prevent breakage of the spray nozzle due to the curved projection of the galvanized steel sheet, and to minimize damage such as scratching of the galvanized steel sheet. It is an object to provide an air knife device for removal.

In order to achieve the above object, the present invention, the knife-type injection nozzle connected to the air supply pipe is tilted so as to be able to rotate and move before and after in the guides located on the upper and lower sides of the galvanized steel sheet, the air from the knife-type injection nozzle In the apparatus for removing hot water from the post-treatment device of the galvanized steel sheet production equipment is injected, one side of the guide is symmetrically formed so as to face each of the a-shaped guide groove, the a-shaped guide groove in the outer side of the air supply pipe Protruding control rods are selectively fitted in the guide grooves to fix the knife-type injection nozzles at the air injection position and the standby position, respectively.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The air knife device 1 according to the present invention is located at the rear of the hot water spray chamber 120, has a symmetrical structure, and a galvanized steel sheet (S) between a pair of air spray units (10a) (10b) ) Is moved.

Each of the air spray units 10a and 10b has the same structure, and each has a cylindrical guide stand 15a and 15b, and both ends of the guide stand 15a and 15b have hot water spray chamber 120. It is fixed to the side wall 21 of each integrally.

In addition, the guides 15a and 15b have large cutouts 16a and 16b formed long in the longitudinal direction, and extend outward through one side wall 121 of the hot water spray chamber 120. Small cutouts (17a) and (17b) connected to the large cutouts (16a) and (16b) are formed at one side end thereof in the longitudinal direction, and the knife-type spray nozzles (25a) are formed at the small cutouts (17a) and (17b). A guide groove (G) of the a-shape for determining the air injection position and the standby position of the (25b) is formed to face symmetrically.

Then, inside the guides 15a and 15b, air supply pipes 20a and 20b, which coincide with the inner diameter and have a smaller outer diameter, are fitted, and one end of the air supply pipes 20a and 20b (not shown). C) is blocked, and the other end is connected to each of the flexible tubes F at the outside of the hot water spray chamber 120. In addition, knife-type injection nozzles 25a and 25b are formed on one side of the air supply pipes 20a and 20b in the longitudinal direction, respectively, to protrude to the cutouts 16a and 16b of the guides 15a and 15b. It is formed, and the adjustment bar (26a) (26b) that can be fitted into the guide groove (G) in the small cut portion (17a) (17b) of the guide (15a) (15b), respectively, protruding on the outer surface. At this time, the knife-type spray nozzles 25a and 25b protruding from the cutout portions 16a and 16b of the guides 15a and 15b are provided between the adjusting rods 26a and 16b between the cutout portions 16a and 16b. The position is adjusted up and down by the up and down movement operation of 26b). (27a) (27b) is an indication of the fitting position of the guide groove.

Hereinafter, the operation and effects of the present invention will be described.

The air knife device 1 of the present invention is mounted so that the knife-type injection nozzles 25a and 25b can respectively inject air as opposed to the entry direction of the galvanized steel sheet S as shown in FIG. When the operator inserts and adjusts the adjusting rods 26a and 26b to the " 1 " position 27a of the guide groove G provided in the small cutouts 17a and 17b of the guides 15a and 15b. (Air injection position), each of the knife-type injection nozzles (25a, 25b) is rotated to the injection nozzles (25a, 25b) toward the galvanized steel sheet (S) 45 to the entry direction of the galvanized steel sheet (S) ° C is achieved (see solid line in FIG. 4). At this time, when the operator pulls the adjusting rods 26a and 26b into the " 1 " position 27a of the guide groove G, the air supply pipes 20a and 20b slide in the guides 15a and 15b. It moves and is properly fitted in the guide groove (G) of the a-type.

Since the air supply pipes 20a and 20b are simply inserted into the guides 15a and 15b, there is no influence on the movement by the adjusting rods 26a and 26b. On the other hand, the pressure of the air supplied through the knife-type injection nozzles (25a, 25b) is about 4bar to properly remove the hot water remaining on the upper and lower surfaces of the galvanized steel sheet (S). That is, the galvanized steel sheet (S) is passed through the air curtain (Air Curtain) formed of a layer of air supplied through the knife-type injection nozzles (25a, 25b), the hot water of the upper and lower surfaces are removed will be. And, when the air knife device 1 of the present invention is not used, the operator moves the adjusting rods 26a and 26b from the "1" position 27a to the "2" position 27b (standby position). ). Therefore, the knife-type injection nozzles 25a and 25b of the air supply pipes 20a and 20b are rotated outward as shown by the dotted line in FIG. 4 to be separated from the galvanized steel sheet S, and the galvanized steel sheet ( Even if the curved projection part of the waveform on S) is formed, it does not interfere with the injection nozzles 25a and 25b.

In this case, the operator can easily adjust the rods by moving the rods 26a and 26b up and down, respectively, and pulling them slightly forward to fix the adjustment rods 26a and 26b at the "2" position 27b. .

According to the present invention as described above, a pair of air supply pipe (20a) (20b) is fitted into the guide grooves (G) and adjustment rods (26a) (26b) of the a-shape respectively to the guide (15a, 15b) The hot water is completely removed from the hot water spraying chamber 120 because the hot water attached to the upper and lower surfaces of the galvanized steel sheet S is removed at an air pressure of 4 bar or more. In addition, during the air spraying operation, the spray nozzles 25a and 25b are rotated to approach the galvanized steel sheet S to achieve a good hot water removing operation. When the air spraying operation is completed, the spray nozzles 25a and 25b are galvanized. It is rotated away from the steel plate (S) and does not come into contact with the protruding portion of the galvanized steel sheet (S), thereby preventing damage to the spray nozzle and preventing quality defects such as scratching of the galvanized steel sheet, thus preventing contamination of the chromium solution. By reducing the concentration of the chromium solution, the chromium solution used can be saved, resulting in cost reduction, and without affecting the chromium film layer of the galvanized steel (S). Since the spraying position and the standby position can be selectively switched by the adjusting rods 26a and 26b and the a-shaped guide groove G, the spray nozzle is prevented from being damaged and the galvanized steel sheet is scratched. Removal will get an excellent practical effect on that.

Claims (1)

The knife-type injection nozzles 25a and 25b connected to the air supply pipes 20a and 20b are rotated, moved forward and backward in the guides 15a and 15b located above and below the galvanized steel sheet S. In the device to be inserted, the air is injected from the knife-type spray nozzles (25a, 25b) to remove hot water from the post-treatment device of the galvanized steel sheet production equipment, one side of the guide (15a) (15b) The a-shaped guide groove (G) is symmetrically formed so as to face each other, the a-shaped guide groove (G) is provided with a control rod (26a, 26b) protruding from the outer surface of the air supply pipe (20a) (20b) Optionally fitted in the groove (G) to fix the knife-type injection nozzles (25a, 25b) in the air injection position and the standby position, respectively, characterized in that the air knife device for removing hot water.