KR20040071844A - Dross removal apparatus of hot galvanizing bath - Google Patents

Abstract

PURPOSE: An apparatus for removing dross from hot dip galvanizing pot is provided simply remove the dross by using specific gravity difference between molten zinc contained in the hot dip galvanizing pot and various foreign materials (dross) floated on an upper part of the molten zinc. CONSTITUTION: The apparatus comprises first moving means(10) comprising a supporting frame(11) installed at both sides of an upper part of the galvanizing pot(100), a moving beam(12) movably installed on an upper surface of the supporting frame, first driving motor(13) installed on one side of the moving beam, and first driving roll(14) rotated by the first driving motor to move the moving beam; second moving means(20) comprising a moving member(21) movably installed on the bottom of the moving beam, second driving motor(22) installed on an upper surface of the moving member, and second driving roll(23) rotated by the second driving motor to move the moving member; a dross collection means(30) installed on the bottom of the second moving means to collect dross(104) floated on an upper part of molten zinc contained in the galvanizing pot; and a dross interception means for cutting off the dross so that the dross collected in the dross collection means is not discharged.

Description

Dross removal apparatus of hot galvanizing bath

The present invention relates to an apparatus for removing dross of a hot dip galvanizing bath, and more particularly, a specific gravity difference between hot dip zinc contained in a hot dip galvanizing bath and various foreign matters floating on the hot dip zinc (hereinafter referred to as 'dross'). The present invention relates to a dross removal apparatus of a hot dip galvanizing tank which can remove dross easily.

In general, the continuous hot dip galvanizing process of the cold rolling mill of the steel mill passes the annealed steel sheet (S) through the zinc zinc bath 100 into the molten zinc to pass zinc to the steel sheet (S) It is a process of plating.

At this time, the steel sheet (S) is introduced into the galvanizing bath 100 while being guided by the steel plate guide and plated while passing through the sink roll 101 to pass through the air knife 102. The air knife 102 is a device for controlling the thickness of the molten zinc buried in the steel sheet (S) by using high-speed air exiting a long narrow gap generates severe noise during operation.

The zinc oxide is produced by the reaction between the steel sheet S and the molten zinc and the reaction of the air blown from the air knife 102 with the molten zinc, and the zinc oxide floats on the hot water surface of the galvanizing bath 100. Such a zinc oxide float is called dross 104, and when the dross 104 is buried in the steel sheet S, the quality of the coated steel sheet is deteriorated, and thus the dross 104 should be periodically removed.

The dross removal method currently in use is to collect the dross 104 generated near the air knife 102 with the dross scraper 105 shown in FIG. 2A and collected into the front dross removal area or the rear dross removal area. Then, it floats with the dross removal shovel 106 shown in FIG. 2B, and throws it into the collection container, and is performed by hand.

At this time, in order to prevent the dross 104 from sticking to the dross removing shovel 106, when the dross 104 is discarded, the dross removing shovel 106 is applied to the dross barrel two to three times to give an impact. The dross 104 attached to the dross removing shovel 106 is shaken off.

However, this work is inconvenient for the operator's work due to the interference of the surrounding equipment and there is a risk of safety accident due to the high temperature of the zinc plating tank 100 of 450 ℃, around the zinc plating tank 100 due to the radiant heat of molten zinc Due to the high temperature, in particular, the working environment is very poor due to the noise generated in the air knife 102, the improvement of working conditions by automation is urgently required.

In order to meet such automation needs, it has been proposed as Utility Model Registration No.

As shown in FIGS. 3A and 3B, a cylinder 112 is embedded in an upper upper portion of the case 110 having a cover 111, and a shovel actuator fastener is provided at the end of the cylinder rod 113 of the cylinder 112. 117 is installed, and one end of the shovel actuator 114 fastened to the shaft pin 116 by the fastening piece 115 is connected to the shovel actuator fastener 117.

Meanwhile, one end of the dross removing shovel 118 having a plurality of micropores is connected to the lower end of the shovel actuator 114, and another cylinder 119 is provided on the other outside of the case 110. The auxiliary plate 121 is installed at the end of the cylinder rod 120 of the cylinder 119.

In addition, the shovel actuator 114 and the dross removal shovel 118 are fastened by the fastener 118a, and the cylinder rod 20 and the auxiliary plate 21 are fastened by the fastener 121a.

Therefore, when removing the dross 104 injured in the galvanizing tank 100, when the cylinder 112 is operated after collecting the dross 104 using a scraper, the cylinder rod (installed in the cylinder 112 ( By the reciprocating motion of 113, the shovel actuator 114 and the dross removal shovel 118 are rotated about the shaft pin 116 installed to the fastening piece 115 to the shaft and collected in the galvanizing tank 100 The dross 104 is placed into a dross removal shovel 118.

On the other hand, when the dross removal shovel 118 is closed, the cylinder 119 installed on the outer side of the case 110 is operated while lowering the auxiliary plate 121 to distal the tip and the auxiliary plate of the dross removal shovel 118. An end portion of the 121 is closely coupled to prevent the dross 104 and the plating liquid from flowing down the entire surface of the dross removing shovel 118.

In addition, the dross removal shovel 118 has a large number of fine pores, so that the plating solution is removed and only the dross 104 remains in the dross removal shovel 118.

However, such a conventional device has a limitation to solve the automation because it is necessary to collect the dross 104 by using a separate scraper to remove the dross 104 floating on the top of the galvanizing bath 100.

In addition, when the dross is removed by a conventional apparatus, since the dross and the molten zinc are discharged together, there is a problem of causing a cost increase.

The present invention is invented to solve the above problems, the object is to move the collector moved by the actuator to the position where the dross is generated to collect the dross and to separate the molten zinc and the dross to discharge the collected dross Therefore, the present invention provides a dross removal apparatus of a hot dip galvanizing tank capable of automatically performing a dross discharge operation.

1 is a perspective view showing a general galvanizing bath.

Figure 2a and 2b is a perspective view showing a conventional dross removal tool.

Figure 3a and Figure 3b is a side view showing the operating state of the conventional dross removal apparatus of another embodiment.

Figure 4 is a perspective view of the dross removal apparatus according to the present invention.

5 is a cross-sectional view showing a dross removal apparatus according to the present invention.

6 to 8 are cross-sectional views showing a state of removing the dross with the dross removing apparatus according to the present invention.

※ Explanation of symbols on main parts of drawing ※

10: first moving means 11: support frame

12: moving beam 13: first drive motor

14: first driving roll 20: second moving means

21: moving member 22: second drive motor

23: second drive roll 30: dross collecting means

31: first cylinder 32: guide rod

33: collecting tube 34: guide member

35: first heater 40: dross blocking means

41: second cylinder 42: rod

43: blocking member 44: zinc discharge hole

45: second heater 100: galvanizing bath

104: dross

The present invention for achieving the above object is a support frame provided on both upper sides of the galvanizing bath, a movable beam installed to be movable on the upper surface of the support frame, a first drive motor installed on one surface of the movable beam, the first First moving means formed of a first driving roll rotated by the driving motor to move the moving beam; Second moving means comprising a moving member movably installed on the bottom surface of the moving beam, a second driving motor provided on the upper surface of the moving member, and a second driving roll rotated by the second driving motor to move the moving member. ; And a dross collecting means for collecting the dross floating on the plating tank and a dross blocking means for blocking the dross collected in the dross collecting means from being discharged.

Referring to the present invention having such characteristics in detail as follows.

4 is a perspective view showing a dross removal apparatus according to the present invention, Figure 5 is a cross-sectional view showing a dross removal apparatus according to the present invention.

As referred to herein, the first moving means 10 is installed on the upper side of the galvanizing bath 100, but the first moving means 10 is supported on both sides of the upper part of the galvanizing bath 100. The frame 11 is provided, and both ends of the moving beam 12 are respectively seated on the support frame 11, and a first driving motor 13 is provided on one surface of the moving beam 12. The first driving roll 14 is installed at both ends of the moving beam 12 so as to rotate in contact with the upper surface of the support frame 11.

On the other hand, the second moving means 20 is provided on the bottom surface of the moving beam 12, the second moving means 20 to move the movable member 21 on the bottom surface of the moving beam 12. The second driving motor 22 is installed on the upper surface of the moving member 21, and the second driving roll 23 rotated by the second driving motor 22 is the moving member 21. It is installed to be rotatable in contact with one surface of the.

And the bottom surface of the second moving means 20 is provided with a dross collecting means 30 for collecting the dross 104 floating in the galvanizing tank 100, the dross collecting means 30 is The first cylinder 31 is provided on the bottom surface of the moving member 21, and the first cylinder 31 is provided with a collecting tube 33 for collecting the dross while moving up and down. On both sides of the cylinder 31, guide rods 32 to which guide members 34 coupled to both sides of the collecting pipe 33 are fitted are provided.

On the other hand, the collecting pipe 33 is preferably formed in a wide conical shape of the lower portion is narrow and the upper narrow conical so as to increase the collection amount of the dross 104, the collecting pipe (33) The first heater 35 for heating the collection pipe 33 may be built in the surface of the 33 so that the dross 104 is not fixed.

In addition, the dross collecting means 30 is provided with a dross blocking means 40 for blocking the collected dross 104 is not discharged, the dross blocking means 40 of the collecting tube 33 The second cylinder 41 is provided inside, and the rod 42 of the second cylinder 41 is provided with a blocking member 43 for blocking the collected dross 104 from being discharged.

It is preferable to form a plurality of zinc discharge holes 44 on the surface of the blocking member 43 so that molten zinc is discharged, and the dross 104 collected inside the rod 42 of the second cylinder 41. The second heater 45 for heating the rod 42 may be built in such that the rod 42 is not fixed.

Referring to the operating state of the present invention configured as described in detail as follows.

First, when removing the dross 104 floating in the galvanizing tank 100, by operating the first moving means 10 to move the moving beam 12 in the longitudinal direction of the galvanizing tank 100, 2 The moving means 20 is operated to move the moving member 21 in the width direction of the galvanizing bath 100 to position the collecting pipe 33 directly above the dross 104.

In this state, when the first cylinder 31 of the dross collecting means 30 is operated, the collecting tube 33 is moved downward, and the guide member 34 installed in the collecting tube 33 is a guide rod. Since it moves along the (32) it is to prevent the flow of the collecting pipe (33).

As described above, when the collecting tube 33 is moved downward, the dross 104 and molten zinc are introduced into the collecting tube 33, and the collecting tube 33 has a wide circular lower portion and a narrow circular cone at the upper portion thereof. The dross 104 and the molten zinc are collected in the center because they are formed in a shape.

In this case, when the second cylinder 41 of the dross blocking means 40 is operated, the blocking member 43 is moved upward to block the lower portion of the collecting pipe 33, and at this time, the molten zinc collected in the collecting pipe 33. Is discharged through the zinc discharge hole 44 formed in the blocking member 43, so that only the dross 104 remains inside the collection pipe 33.

When the collection of the dross 104 is completed as described above, the first cylinder 31 is operated in the reverse direction to move the dross collecting means 30 upward, and then the first moving means 10 and the second moving means 20. ) And the collecting tube 33 is positioned directly above the collecting box 50, and the second cylinder 41 is operated in the reverse direction, so that the dross 104 collected in the collecting tube 33 is caused by its own weight. Fall to the bottom is to be contained in the collecting box (50).

On the other hand, when the first heater 35 embedded in the collecting pipe 33 and the second heater 45 embedded in the rod 42 of the second cylinder 41 are operated, the dross 104 is not fixed. That's it.

As described above, the present invention collects the dross floated on the upper part of the galvanizing bath by using the collecting tube and moves the collecting tube to discharge the collected dross to the outside so that the dross can be removed automatically. There is a distinctive effect.

In addition, since the present invention separates the collected molten zinc and the dross, there is a unique effect of reducing the production cost by preventing the molten zinc is discharged in advance.

Claims (7)

A support frame 11 provided on both upper sides of the galvanizing bath 100, a moving beam 12 installed on the upper surface of the support frame 11, and a first installed on one surface of the moving beam 12. A first moving means (10) comprising a driving motor (13) and a first driving roll (14) rotated by the first driving motor (13) to move the moving beam (12); Rotation by the movable member 21 installed on the bottom surface of the movable beam 12, the second drive motor 22 provided on the upper surface of the movable member 21, and the second drive motor 22. Second moving means (20) consisting of a second driving roll (23) to move the moving member (21); Dross collecting means 30 is installed on the bottom surface of the second moving means 20 to collect the dross 104 floating in the galvanizing tank 100 and The dross removal device of the hot-dip galvanizing bath, characterized in that it comprises a dross blocking means 40 for blocking the dross collected in the dross collecting means 30 is not discharged. According to claim 1, The dross collecting means 30 is the first cylinder 31 installed on the bottom surface of the movable member 21, and the collecting pipe installed to be moved up / down by the first cylinder (31) (33), guide rods (32) provided on both sides of the first cylinder (31), and guide members (34) coupled to both side surfaces of the collection pipe (33) so as to move in a state fitted to the guide rod (32). Dross removal device of the hot-dip galvanizing bath comprising a). 3. The apparatus of claim 2, wherein the collecting pipe (33) has a wide bottom portion and a narrow circular cone shape at the top portion thereof. The method of claim 2, wherein the first tube (35) for heating the collecting tube 33 is embedded in the collecting tube 33 so that the dross 104 is not fixed to the surface of the collecting tube (33). Dross removal apparatus of a hot-dip galvanizing bath which uses. The method of claim 1, wherein the dross blocking means 40 is coupled to the second cylinder 41 installed in the collecting pipe 33 and the rod 42 of the second cylinder 41 up and down Dross removal apparatus of the hot-dip galvanized bath characterized in that it comprises a blocking member (43) for blocking the collected dross (104) to be discharged while being moved. The dross removal apparatus of the hot dip galvanizing bath according to claim 5, wherein a plurality of zinc discharge holes (44) are further formed on the surface of the blocking member (43) to discharge molten zinc. The method of claim 5, wherein the rod 42 of the second cylinder 41 is characterized in that the second heater 45 for heating the rod 42 is embedded so that the trapped dross 104 is not fixed. Dross removal device for hot dip galvanizing bath.