KR20040037347A - Device for preventing clog of MgO supply pipe - Google Patents

Abstract

PURPOSE: An apparatus for preventing clogging of supply pipe of MgO coating solution for electroplated strip is provided to prevent the coating solution from being stuck to an inner part of the supply pipe by periodically flowing air through the supply pipe for circulating the coating solution. CONSTITUTION: The apparatus comprises a supply pipe longitudinally formed of a flexible corrugated pipe(10); and a flowing part comprising supporting shafts(20) rotationally installed at supporting brackets(21) by means of a bearing block, wherein the supporting brackets are projectingly installed at both ends of the corrugated pipe, a driving means for rotating the supporting shafts, circular inclined cams(22) a plurality of which are arranged along the supporting shafts and inclined to the supporting shafts, and interlocking members(23) which are installed at an outer side of the corrugated pipe, and on the surface of which grooves(24) are formed so that the outer circumferential parts of the inclined cams are inserted into the grooves, wherein the driving means comprises a driving motor(25), and a pair of bevel gears(26) installed at shaft of the driving motor and the supporting shafts, wherein the apparatus further comprises an atmospheric air injection part comprising cylinders(40), reciprocating guide member(41), air pipes(44), elastic tube, inflow pipes(45) and check valves(46,47).

Description

Device for preventing clog of MgO supply pipe

The present invention relates to a coating facility for coating a MgO solution on the surface of the steel sheet during the production of electroplated steel sheet, and more particularly, to prevent clogging of the coating solution supply pipe to prevent the supply pipe supplying the coating solution from being blocked by the coating solution. It is about.

In general, a grain-oriented electrical steel sheet is made of a strip of about 0.3 mm after two cold rolling or one cold rolling with intermediate annealing of silicon and traces of micro precipitate formation element or critical segregation element, and then wet hydrogen. Decarbonization annealing for a few minutes at a temperature of 800-900 ℃ under a nitrogen and mixed atmosphere, and then subjected to annealing by applying an annealing separator, MgO.

At this time, a secondary recrystallization phenomenon occurs in which the crystal axes of the grains of the strip are arranged along the rolling direction, and the annealing strip is subjected to a coating process and a curing process of forming a coating solution coated on the surface as an insulating film. After final productization.

In this coating process, as shown in FIG. 1, a predetermined amount of MgO solids in the mixing tank 100 is mixed and mixed with distilled water with an appropriate ratio, and the stirred coating solution is supplied to the bottom of the mixing tank 100. Dropped naturally through) is supplied to the top of the strip through the nozzle 120 installed at the end of the supply pipe 110, the coating solution is applied to the strip surface while passing through the upper, lower ringer roll 130 .

A portion of the coating solution supplied through the nozzle 120 is collected in the storage pan 140 and then drained to the storage tank 150, and the coating solution in the storage tank 150 is pumped by the pump 151. It is supplied back to the mixing tank 100 along the recovery pipe 160 to perform a continuous coating operation.

Here, the coating solution is MgO aqueous solution is a certain amount of additives are added to increase the adhesion to the strip, the additive is fixed to the inner peripheral surface of the supply pipe during the natural fall of the coating solution through the supply pipe to hinder the flow of the solution and in severe cases nozzle Blocking the solution supplied to the coating leads to coating defects, and shortens the life due to damage to the Ringer's roll, which causes a huge loss in productivity.

Furthermore, since the supply pipe adopts a natural drop type to prevent the solution from scattering to the outside when discharged through the nozzle and prevents the solution loss, the blockage of the supply pipe is more frequent.

Therefore, in order to prevent the supply pipe from being blocked in advance, the worker frequently applies a shock to the supply pipe and periodically removes the fixed material. However, this conventional structure increases the labor intensity of the worker, and removes the solids in the coating solution when the fixing part is removed. Is introduced and discharged, and this mass fills the processed grooves on the ringer roll surface, thereby causing a problem of streaks on the coated strip surface.

In addition, the mass of solids remains in the aqueous solution of MgO, causing continuous coating failure.

In addition, in spite of the prevention of such an operator, if the supply pipe is blocked, the ringer roll may be damaged prematurely due to the increased frictional force between the strip surface and the ringer roll due to the unsupply of the aqueous solution.

Accordingly, the present invention has been made in order to solve the above problems, the coating solution supply pipe clogging prevention device for electroplating steel sheet to prevent the solution is fixed in the flow by supplying the supply pipe through which the coating solution is distributed at regular intervals. The purpose is to provide.

In addition, another object of the present invention is to provide an apparatus for preventing clogging of a coating solution supply pipe for an electroplated steel sheet, which can improve a solution flow in a supply pipe.

1 is a schematic perspective view showing a general electroplating steel coating equipment,

Figure 2 is a perspective view of the coating solution supply pipe blockage preventing apparatus according to the present invention,

Figure 3 is a side cross-sectional view showing a state of use of the coating solution supply pipe blockage preventing apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

10: corrugated pipe 20: support shaft

22: inclined cam 23: interlocking member

24: groove 25: drive motor

26: Bevel Gear 27: Pulley

28: belt 29: guide roll

40: cylinder 41: reciprocating guide member

42: groove 43: piston

44: air pipe 45: inlet pipe

46,47: check valve 48: elastic tube

49: injection hole

In order to achieve the object as described above, the blockage preventing apparatus of the present invention is provided in the coating solution mixing tank, the supply pipe for supplying the coating solution to the nozzle is made of a flexible corrugated pipe, for flowing the corrugated pipe along the longitudinal direction Characterized in that it comprises a flow portion.

In this case, since the position of the nozzle installed at the end of the corrugated pipe should be fixed constantly, it is preferable to fold or unfold the surface of the corrugation while maintaining the overall length as it is.

The present invention may further include an air injection unit for injecting cooling air into the corrugated pipe so that the coating solution inside the corrugated pipe can maintain a proper temperature and a smooth flow.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view showing a general electroplating steel sheet coating equipment.

According to the drawings, the coating equipment is provided with a mixing tank 100 in which a coating solution is stored, a supply pipe 110 installed at a bottom of the mixing tank 100 to supply a coating solution to a strip, and an end of the supply pipe 110. It is installed in the nozzle 120 for evenly supplying the coating solution to the strip surface, the upper and lower ringer roll 130 is installed at the rear end of the nozzle 120 to apply the coating solution supplied to the strip surface on the strip surface do.

Therefore, the coating solution mixed and stirred in the mixing tank 100 is naturally dropped through the supply pipe 110 installed at the bottom of the mixing tank 100 and supplied to the upper portion of the strip through the nozzle 120 installed at the tip of the supply pipe 110. The coating solution applied on the strip is to be evenly applied to the surface of the strip while passing through the upper, lower ringer roll (130).

And Figure 2 is a perspective view showing a coating solution supply pipe blockage preventing apparatus according to the present invention, Figure 3 is a side cross-sectional view showing a state of use of the coating solution supply pipe blockage preventing apparatus according to the present invention.

According to the above drawings, the supply pipe blockage preventing device of the present invention, in the coating equipment of the above structure, the supply pipe is made of a corrugated pipe (10) that can be stretched by itself to form a wrinkle on the surface, the outside of the corrugated pipe (10) The corrugated pipe 10 has a structure in which a flow portion for flowing the corrugated pipe 10 along the longitudinal direction by folding or unfolding the corrugations on the surface thereof, and an air injection portion for supplying cooling air into the corrugated pipe 10. have.

Accordingly, while the wrinkles on the surface of the corrugated pipe 10 are folded and unfolded, the corrugated pipe 10 is moved to prevent the coating solution from flowing through the corrugated pipe 10.

The flow unit is a support shaft (20) rotatably installed via a bearing block on a support bracket (21) protruding from both ends of the corrugated pipe (10), and drive means for rotating the support shaft (20) , A plurality of circular inclined cams 22 disposed along the support shaft 20 and inclined with respect to the support shaft 20, installed outside the corrugated pipe 10, and on the surface of the outer periphery of the inclined cam 22. It includes an interlocking member 23 is formed with a groove 24 is inserted.

Accordingly, the position of the outer circumferential surface of the inclined cam 22 is changed along the longitudinal direction of the corrugated pipe 10 according to the rotation of the rotating shaft so that the interlocking member 23 into which the inclined cam 22 is inserted is also moved to flow the corrugated pipe 10. .

In this embodiment, two sets of inclined cams 22 having different inclined directions are disposed on both sides of the corrugated pipe 10 so that the corrugated pipe 10 may be collected or unfolded to flow the corrugated pipe 10.

Here, two support shafts 20 are disposed at intervals of 180 degrees with respect to the center of the corrugated pipe 10, and the inclined cam 22 and the interlocking member 23 are positioned at the same positions of the respective support shafts 20 and the corrugated pipe 10. ) Is installed so that the surface of the corrugated pipe 10 can flow evenly as a whole.

At this time, the inclined cam 22 installed on each support shaft 20 is disposed so that the inclined angle thereof is opposed to the center of the corrugated pipe 10, as shown in FIG. This is to cause the corrugated pipe 10 to be labeled or folded in the same manner.

In addition, according to the present embodiment, the drive means includes a drive motor 25, a pair of bevel gears 26 installed on the shaft of the drive motor 25 and the support shaft 20. And in order to transfer the power of the drive motor 25 to the other support shaft 20 in the same rotation direction, the pulleys 27 are installed on each of the support shafts 20 and connected to the belt 28. At this time, a guide roll 29 for guiding the belt 28 is installed on the outer surface of the corrugated pipe 10 for smooth rotation of the belt 28.

On the other hand, when looking at the air injection portion is installed in the mixing tank 100 and the bracket 30 extending along the side of the corrugated pipe 10, the cylinder 40 located outside the corrugated pipe 10 and the cylinder 40 The reciprocating guide member 41 is formed at the tip of the piston rod of the reciprocating guide member 41 having a groove 42 into which the outer circumferential portion of the inclined cam 22 is inserted along the outer circumferential surface thereof, and connected to each chamber of the cylinder 40. Air tube 44 is installed in communication with each other, the air tube 44 is connected to the end of each of the air pipe 44 is located inside the corrugated pipe 10 is an elastic tube formed with a spray hole (49) to spray air in the coating solution flow direction ( 48, a check valve installed in each of the air pipes 44 and each inlet pipe 45 for supplying air to each chamber of the cylinder 40, and for circulating air in one direction ( 46,47).

Here, two cylinders 40 are installed around the reciprocating guide member 41, and the piston rods of the respective cylinders 40 are connected to both ends of the reciprocating guide member 41 to the flow of the reciprocating guide member 41. Accordingly, the piston 43 of each cylinder 40 is operated to continuously inject air.

Hereinafter will be described the operation of the present invention.

When the drive motor 25 is actuated, the support shaft 20 is rotated through the bevel gear 26 and the other support shaft 20 connected to the support shaft 20 via the pulley 27 and the belt 28. ) Is also rotated in the same direction.

As the support shaft 20 rotates, the inclined cam 22 installed on the support shaft 20 also rotates so that the position of the outer peripheral portion of the inclined cam 22 with respect to the corrugated pipe 10 is changed. Accordingly, the interlocking member 23 installed so that the outer peripheral portion of the inclined cam 22 is interlocked with the groove 24 is moved in the longitudinal direction according to the position of the outer peripheral portion of the inclined cam 22.

Therefore, the corrugated pipe 10 having the interlocking member 23 is provided with fluidity to the corrugated pipe 10 while repeating the wrinkles being stretched and folded along the longitudinal direction of the corrugated pipe 10.

As the wrinkles forming the surface of the corrugated pipe 10 are repeatedly folded or unfolded, the coating solution circulated through the corrugated pipe 10 can be prevented from being attached to the inner circumferential surface of the corrugated pipe 10.

At this time, since both ends of the corrugated pipe 10 are supported by the support shaft 20, the overall length of the corrugated pipe 10 does not change, and despite the flow of the corrugated pipe 10, the nozzle 120 installed at the end of the corrugated pipe 10. It is possible to maintain the position of.

On the other hand, the air in the air flows into the corrugated pipe 10 as the support shaft 20 rotates to cool the coating solution and keep the flow smoothly.

That is, when the support shaft 20 rotates, the reciprocating guide member 41 which is interlocked and installed in the inclined cam 22 via the groove 42 on the outer side of the corrugated pipe 10 according to the rotation of the inclined cam 22. The piston 43 flows in the opposite direction to the interlocking member 23, and the piston 43 moves forward and backward with respect to each cylinder 40 in accordance with the reciprocating movement of the reciprocating guide member 41.

Each chamber of the cylinder 40 divided by the piston according to the operation of the piston 43 is expanded and contracted. When the chamber is expanded, air in the atmosphere is introduced into the chamber through the inlet pipe 45 and the chamber is When contracted, the supplied air is compressed and sent to the inside of the corrugated pipe 10 through the air pipe 44.

Accordingly, while the injection hole 49 of the elastic tube 48 installed in the air pipe 44 is opened, the compressed air is injected through the injection hole 49 in the coating solution flow direction of the corrugated pipe 10 to flow the coating solution. In addition, the temperature of the coating solution is lowered appropriately.

At this time, the check valves 47 and 46 installed in each of the inlet pipe 45 and the air pipe 44 distribute the air flow only from the inlet pipe 45 toward the air pipe 44, thereby preventing the reverse flow of air or the coating solution. Will be prevented.

According to the present invention, the coating solution supply pipe clogging prevention device for electroplating steel sheet according to the present invention can prevent the coating solution from adhering to the inner circumferential surface of the supply pipe during the distribution of the coating solution by flowing the supply pipe at a predetermined cycle.

Accordingly, the coating solution can be smoothly supplied to prevent breakage of the ringer roll and to prevent coating failure of the steel sheet.

In addition, by injecting the cooling air in the coating solution flow direction of the supply pipe it is possible to smoothly maintain the flow of the coating solution and to improve the coating properties by cooling the coating solution to an appropriate temperature.

Claims (3)

A supply pipe made of a longitudinally expandable corrugated pipe, A support shaft rotatably installed through a bearing block on a support bracket protruding from both ends of the corrugated pipe, a driving means for rotating the support shaft, a plurality of circularly disposed along the support shaft and inclined with respect to the support shaft Inclined cam of the, the outer side of the corrugated pipe is installed on the outer surface of the inclined cam including an interlocking member formed with a groove to insert, the flow portion for flowing the corrugated pipe along the longitudinal direction Coating solution supply pipe blockage preventing device for electroplating steel sheet comprising a. 2. The apparatus of claim 1, wherein the driving means includes a driving motor and a pair of bevel gears installed on the shaft and the support shaft of the driving motor. 3. A cylinder according to claim 1 or 2, which is installed on a bracket extending along the side of the corrugated pipe and positioned outside the corrugated pipe, and which is installed at the tip of the piston rod of the cylinder and whose outer peripheral portion of the inclined cam is inserted along the outer circumferential surface thereof. A reciprocating guide member having a groove formed therein, an air pipe connected to each chamber of the cylinder to communicate with the inside of the corrugated pipe, and installed at the end of each air pipe and positioned inside the corrugated pipe to inject air into the coating solution flow direction. Including a formed elastic tube, inlet pipe for supplying air to each chamber of the cylinder, check valves installed in each of the air pipe and each inlet pipe to distribute the air in one direction, injecting the cooling air into the corrugated pipe Coating solution supply pipe clogging prevention device for electroplating steel sheet, characterized in that it further comprises an air injection unit for .