JPH0355541B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an apparatus for producing minimum spangle hot-dip galvanized steel sheets.

B. Prior Art As an example of a conventional product of this kind, for example, as shown in Japanese Patent Application Laid-open No. 137628/1983, a steel plate strip passes through a plating bath and has a passageway extending from the bottom to the top in a casing. A pair of spangle erasing devices are installed facing each other with the strip in between. However, in the lever device, an air header and a water header, which are long in the width direction of the strip, are installed at intervals vertically, and between these headers, a large number of branch pipes extending vertically are provided at equal intervals in the width direction of the strip. , a nozzle was attached to each of these branch pipes.

C. Problems to be Solved by the Invention In the above-mentioned conventional technology, since the nozzles are installed at small intervals, it is extremely troublesome to replace the nozzles when they become clogged. This nozzle replacement is carried out by slowing down the advancing speed of the strip, but this not only reduces work efficiency, but also results in defective products, as well as creating an extremely poor work environment as water vapor is blown out from the nozzle. It was hot.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a device that allows the nozzle to be replaced with a spare one even if it becomes clogged, and has a lightweight and compact nozzle header.

D. Means for Solving the Problems In order to achieve the above object, the configuration of the present invention is as follows. A minimum spangle hot-plated steel plate manufacturing apparatus, in which a pair of spangle erasing devices are installed facing each other with the strip in between, in a casing having a path for the steel plate strip to pass through a plating bath and proceed from bottom to top, The spangle erasing device includes a plurality of erasing nozzles provided at equal intervals in the width direction of the strip, a nozzle header to which these nozzles are detachably attached, and a nozzle header that guides and supports the header so as to be slidable in the length direction thereof. The nozzle header has a first header that is long in the width direction of the strip, a second header that is attached to the rear side of the first header and is long in parallel to the first header, and a plurality of headers arranged at equal intervals in the length direction of the header. a nozzle introduction member which is fixed and penetrates the first header in the front-rear direction and has an air passage for the liquid passage, and the nozzle introducing member is fixed so as to pass through the first header in the front-rear direction, and the nozzle introduction member A drain receiver is provided below the spangle eraser, a convection prevention plate is provided that separates from the strip as it goes downward from the nozzle and reaches the drain receiver, and the upper part of the casing is provided with a convection prevention plate for displacing mist. A mist exhaust hood was installed to exhaust the air upward.

E Effect When air is introduced into either the first or second header and liquid is introduced into the other, they are mixed and injected from the nozzle through the nozzle introducing member. If the nozzle becomes clogged, a spangle elimination backup device is activated. Alternatively, separate the pipe connection tube opening of the nozzle header, pull out the header along its length through the slide guide, and replace the clogged nozzle with a new one, or replace the nozzle header with a spare by immediately moving the slide guide. Install it at the location.

As the strip advances upward, the mist flowing upward from the nozzle is blocked by the casing inner wall, goes around the rear of the nozzle, passes below the nozzle again, circulates forward, and prevents convection from colliding with the strip surface. Since it is blocked by the plate, water droplets adhering to the inner wall of the device are prevented from adhering to the strip due to droplets, and the quality of the product is not degraded.

F. Embodiment An embodiment of the present invention will be described below based on the drawings. In FIG. 1, a spangle erasing device B is provided in a casing 1 having a rectangular parallelepiped appearance and having a passage 1a for a steel plate strip A that passes through a plating bath and advances from bottom to top. A passage door 1a is provided on the side surface of the strip passage 1a, and an opening/closing cylinder 1d thereof is provided on the outer surface of the casing. Further, a mist suction adjustment port 1d is provided on the upper surface of the casing.
A mist chamber 2 is formed inside the casing 1 by a mist guide wall 2a extending from above to the upper end of the erasing device B, and a mist suction port 2b is formed at the top of this wall.
is provided so that the opening area can be adjusted by a damper.

Now, in this apparatus, the spangle erasing device consists of a main device B and a standby device C, which are vertically spaced apart from each other. FIG. 4 shows a preliminary spangle eliminating device C equipped with a nozzle header 3. As shown in FIG.
Strip A progresses from bottom to top as shown by the arrow, and is sandwiched between a pair of erasing devices (one
(Only one set is shown) and is installed above the drain receiver 1b provided at the bottom of the casing 1. Also shown are a plurality of erasing nozzles N provided at equal intervals in the strip width direction and a nozzle header 3 to which these are removably attached.

As shown in FIGS. 4 to 6, the nozzle header 3 includes an air header 31 which is a first header which is long in the width direction of the strip A, and a second air header which is attached to the rear side (the side opposite to the strip) and which is long in parallel to the air header 31. It has a liquid header 32 as a header. One lengthwise end portion of each of both headers is provided with one tube connection port 33, 34, respectively, and these are oriented toward one end in a direction parallel to the lengthwise direction of the header. Several nozzle introduction members 35 are fixed to the air header 31 at equal intervals in the length direction of the header, passing through the air header in the front-rear direction (direction perpendicular to the strip). This member 35 has a cylindrical shape and has a liquid passage 35a penetrating in the front and back direction on its central axis, a nozzle N is detachably attached to the tip thereof, and the rear end is open to the liquid header 32. There is. Further, a plurality of air passages 35b are provided around the outside of the liquid passage 35 at equal intervals on the circumference near the connection portion of the nozzle N. A slide guide 36 is provided to guide and support both the headers so as to be slidable in their length directions. That is, a rail 36e is installed on the lower wall 36b, which is a web, of the irregularly shaped channel steel main body 36a.
The header is supported through the front wall 36c, which is a short flange, and the rear wall 36d, which is a long flange, and is positioned and guided in the front-rear direction.

Next, as shown in FIGS. 7 and 8, the header 3 is fixed via a bracket 5 to a horizontal header support rod 4 parallel to the strip, and is pressed down from above by a header fixing arm 6. Both ends of the support rod 4 are rotatably supported by a rod receiving plate 7.

The nozzle advancing/retracting part 8 for moving the nozzle N forward and backward with respect to the strip has a rectangular horizontal slide plate 8a on which the rod receiving plate 7 is erected, and is supported so as to be slidable in the front and rear directions on the upper surface of the horizontal base plate 8b. , upward movement is regulated by a horizontal guide rod 8j that is long in the front-rear direction, and a nut member 8d is mounted on the top surface of the slide plate 8a.
is fixed, and the guide pin 8 is inserted from the lower end surface of the nut member.
h is hanging down. This pin 8h passes through a slit 8c in the board and is guided so as to be movable back and forth. A nozzle advance/retreat screw shaft 8e extends horizontally in the front-rear direction and is rotatably supported by bearing plates 8f at both ends so as to be screwed into the nut member and move it forward and backward, and one end thereof extends through the casing 1. It is rotated by a handle not shown. Note that 8g is the opening cap where the handle is attached. Also, the screw shaft 8e
A protective bellows tube 8i is provided between the bearing plate 8f and the nut member 8d to cover the periphery of the screw shaft and prevent mist from adhering to the screw shaft.

Next, the nozzle angle adjustment section 9 that adjusts the angle of the nozzle N with respect to the strip is attached to the header support rod 4.
An angle adjustment lever 9a fixed to one end, and a nozzle angle setting plate 9c erected from a slide plate 8a.
It is adjusted by inserting pins (not shown) into pin holes 9b and 9d provided in the lever 9a and setting plate 9c, respectively.

Next, the operating state will be explained above. When air is introduced into the air header 31 and liquid is introduced into the liquid header 32, these are mixed at the nozzle N through the respective passages of the nozzle introduction member 35, and the strip A
It is sprayed directly towards the area. If a part of the nozzle is now clogged, the backup device C is activated.
Alternatively, the tube connection ports 33 and 34 are separated, and the header 3 is pulled out in the longitudinal direction under the guidance of the slide guide 36 and replaced with a spare header.

In order to adjust the distance of the nozzle N to the strip, a screw shaft 8e is used in the nozzle advance/retreat portion 8.
When a handle is attached to the tip of the head and rotated, the nut member 8d moves forward and backward with respect to the strip, and at the same time, the slide plate 8a moves forward and backward, and the header support rod 4 moves forward and backward. Then, the header 3 moves forward and backward together with it, thereby making it possible to adjust the distance.

Next, the angle of the nozzle N is adjusted by activating the nozzle angle adjustment section 9 and rotating the lever 9a to change the fitting position of the pin with respect to the angle setting plate 9c.

Next, in FIG. 1, a main nozzle header inlet/outlet cover 11a and a spare nozzle header inlet/outlet cover 11b are provided on the side surface of the casing 1. Also, as you go below the nozzle of main device B, the strip A
There are provided a main convection prevention plate 12 which is separated from the strip A and extends to the rear of the nozzle header of the preliminary device C, and a preliminary convection prevention plate 15 which is separated from the strip A and reaches the preliminary drain receiver 16 as it goes below the nozzle of the preliminary device C. ing. 13 is a main drain receiver installed on the lower side of the main device B.

Furthermore, in Fig. 3, there is a maintenance cover 1 on one side wall leading to the strip of the casing.
7 are provided at four locations, and a mist exhaust hood 18 communicating with the mist chamber 2 is provided on one side perpendicular to the strip of the casing to exhaust the mist upward. is provided, and a drain pipe 20 hangs down from its lower end.

Here, the mist that attempts to circulate within the casing 1 is blocked by the main and auxiliary convection prevention plates 12 and 15, and water droplets from the mist adhering to these plates are received by the main drain receiver 13 and the auxiliary drain receiver 16, and then the casing be led outside of 1.

In the above, since one tube connection port is provided at one end of each header, there are fewer tube joints, which greatly improves assembly efficiency and reduces the number of fluid leak points. Therefore, it has become possible to provide a header that is overall compact and lightweight. Note that when the header is long, a partition plate may be provided in the middle, and pipe connection ports may be provided at both ends of the header.

In addition, since the main and preliminary convection prevention plates are installed inside the casing, the circulating flow of mist is blocked and water droplets adhering to the inner surface of the casing are prevented from falling off and adhering to the strip, which has a negative impact on the quality of the strip product. As a result, there was no longer a problem with the production process, and there was no decrease in yield.

G Effect As described above, the present invention provides the first method for guiding water and liquid.
Since the header and the second header are integrally connected and supported by a slide guide that guides them slidably in the length direction, even if the nozzle becomes clogged, the header can be immediately removed to replace or spare the nozzle. The header will be replaced immediately.

And by providing a slide guide,
The nozzle header can be stably fixed, and the nozzle can be easily pulled out and replaced.

In addition, since the first header and the second header are integrally connected and a nozzle introduction member is provided that communicates with them, the number of pipe joints of the header is reduced, which greatly improves assembly work efficiency. There are fewer leak points. Therefore, it has become possible to provide a header that is overall compact and lightweight.

In addition, since a convection prevention plate and a drain receiver are installed inside the casing, the circulation of mist is blocked and water droplets adhering to the inner surface of the casing are prevented from dripping and adhering to the strip, thereby improving the quality of the strip product. It has no adverse effects and does not cause a decrease in yield. Moreover, the provision of the exhaust hood prevents environmental pollution around the device.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a right side view, Fig. 4 is an enlarged cross-sectional view at right angles to the length direction of the header, and Fig. 5 is a view of the header. FIG. 6 is a left side view, FIG. 6 is a right side view of the header, FIG. 7 is an enlarged front view of the main part of the spangle eliminating device of FIG. 1, and FIG. 8 is a fragmentary plan view thereof. A... Strip, B, C... Main and spare spangle eraser, N... Nozzle, 3... Nozzle header, 31... First header, 32... Second header, 33... Pipe connection tube opening, 34... ...Pipe connection tube opening,
35... Nozzle introducing member, 35a... Liquid path, 3
5b...Air path, 36...Slide guide, 36
a...Main body, 36e...Rail, 4...Header support rod, 5...Bracket, 6...Header fixing arm, 7...Rod receiving plate, 8...Nozzle advance/retreat portion, 8d...Nut member, 8e ...Nozzle advancement/retraction screw shaft, 9... Nozzle angle adjustment section, 9a... Angle adjustment lever, 9c... Nozzle angle setting plate, 12...
Main convection prevention plate, 13...Main drain receiver, 15...Preliminary convection prevention plate, 16...Preliminary drain receiver.

Claims (1)

[Claims] 1. In an apparatus for producing minimum spangle hot-plated steel sheets, in which a pair of spangle erasing devices are installed facing each other with the strip in between, in a casing having a passage for the steel sheet strip passing through a plating bath and proceeding from the bottom to the top. , the spangle erasing device includes a plurality of erasing nozzles provided at equal intervals in the width direction of the strip, a nozzle header on which these nozzles are detachably attached, and a guide support for the header so as to be slidable in the length direction thereof. The nozzle header has a first header that is long in the width direction of the strip, a second header that is attached to the rear side of the first header and is long in parallel to the first header, and a slide guide that is equally spaced in the length direction of the header. A plurality of nozzle introduction members are provided, each having a liquid path and an air path, and fixedly penetrating the first header in the front-rear direction, and air is placed in one of the first and second headers, and liquid is placed in the other. is introduced, a drain receiver is provided below the spangle eraser, a convection prevention plate is provided that separates from the strip as it goes downward from the nozzle and reaches the drain receiver, and the upper part of the casing is provided with a convection prevention plate that is connected to the drain receiver. A minimum spangled melt-plated steel plate manufacturing device, characterized in that a mist exhaust hood is provided to exhaust air upward.