KR101518613B1 - Drip-pan apparatus having dual structure and device using rollers for coating - Google Patents

Abstract

The present invention relates to a double structure drip pan apparatus and, more specifically, a double structure drip pan apparatus, comprising a drip pan which is installed in the lower part of a rotatable roll to rotate when the certain area on the roll is partly inserted and accordingly includes a liquid storage space to supply liquid due to the rotating of the roll; a drip pan case which is installed on the outside of the drip pan to store the drip pan and includes another liquid storage space to store liquid which flows over the liquid storage space of the drip pan; a supply discharging pipe part which supplies liquid from a liquid supplying tool to the drip pan or the drip pan case; and a discharge pipe part which is connected to a liquid discharge tool from the drip pan case to enable the drip pan case to discharge liquid.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip pan apparatus and a roll coating apparatus,

The present invention relates to a drip pan device having a dual structure in a drip-pan device for receiving a solution applied to a rotating roll.

More particularly, it relates to a double structure for suppressing generation of resin gel and generation of surface defects of a strip when a clean resin solution from which a foreign substance is removed is applied to a coating roll in a post-treatment resin coating process of a strip plating process line And a roll coating apparatus including the same.

The process of applying the resin solution 11 to the coating roll in the post-treatment resin coating process of the plating line of a general steel mill is as shown in Fig. The resin solution 11 supplied from the circulation tank 25 is a clean resin solution 11 from which foreign substances have been removed through the foreign matter filter 20 and is discharged along the supply pipe 7 connected to the circulation tank 25, And is supplied to the roll drip pan 10. The supplied resin solution 11 is applied directly to the strip 1 by the rotation of the pickup roll 3, the transfer roll 4 and the applicator roll 5. In this regard, reference is made to "Drip pan for roll coating with improved flow performance of coating liquid " (Patent Document 1).

At this time, since the resin solution (11) is directly applied to the strip (1), a clean state must be maintained continuously. If the resin gel 9 is generated in the resin solution 11 or the resin solution 11 is not removed as shown in Fig. 2, the resin gel 9 is not removed, Or foreign matter adheres to the strip 1 as it is, it may cause surface defects. Therefore, there is a need to remove such foreign matter.

In this case, the contaminated resin solution 11 is moved to the foreign matter filter 20 along the return pipe 8 provided at one side of the resin coated roll drip pan 10, and the foreign matter filtering The cleaned resin solution 11 that has been treated is again transferred to the circulation tank 25 and stored.

Further, in the case of a metal-resin-coated steel sheet coated with a fuel tank, a coated primary coating solution is coated on a coated steel sheet, then a metallic resin is applied to an upper layer, and the coating is passed through an oven, At this time, the coating operation is performed on the basis of 800 to 5000 mg / m < 2 >. In such a coating process, the metallic component factors unique to the resin solution 11 are caused by the ratio of the main component of the coating roll and the NIP pressure The resin gel 9 starts to be generated inside the resin coating roll drip pan 10 and from the edge of the upper layer.

When the resin gel 9 remains in the resin solution 11 or flows into the circulation tank 25, it is attached to the pickup roll 3 rotating in the resin-coated roll drip pan 10, Is attached to the transfer roll 4 by the rotation of the pickup roll 3 and is attached to the applicator roll 5 by the rotation of the transfer roll 4. [ If the resin gel 9 is adhered to the strip 1 by the rotation of the roll, the strip 1 remains as a surface defect.

In the process of passing the strip 1 having the resin gel 9 on its surface passing through the process roll, a resin pick-up defect further occurs. If the resin gel 9 accumulates, The resin solution 11 can not be normally supplied to the resin-coated roll drip pan 10. As a result, when the resin solution level in the resin-coated roll drip pan 10 is insufficient, the coating roll is damaged and coating trouble is generated, thereby stopping the entire process line.

Further, it is difficult to check the state of the resin solution level in the resin-coated roll drip pan 10, and there is a problem that it is very difficult to take precautions before a problem such as stopping the process line occurs.

KR 10-2012-0074801 A KR 10-2010-0006761 A

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the prior art as described above, and to provide a double-structure drip pan to prevent a state of insufficient solution level in the drip pan.

Another aspect of the present invention is to provide a piping structure for allowing a remaining resin solution to be filtered through a foreign matter filter in a short time.

The present invention, as one aspect, aims to prevent problems such as clogging of piping that may occur during coating operation.

According to one aspect of the present invention, there is provided a liquid supply device including a liquid containing space for supplying liquid by rotation of a roll, A drip pan case provided on the outside of the drip pan to receive the drip pan and to receive a liquid flowing in excess of the liquid containing space of the drip pan; A supply piping portion provided to supply liquid from the means to the drip pan or the drip pan case; And a discharge pipe connected from the drip pan case to the liquid discharging means so that the drip pan case discharges the liquid, wherein the drip pan includes a liquid containing space, And at least one first overflow guiding pipe provided at an edge of the opened upper surface to guide the liquid flowing in the liquid containing space of the drip pan to be discharged into the drip pan case , And the drip pan case includes a second overflow guiding pipe which is installed at an upper edge of the drip pan case and connected to the liquid discharging means so as to discharge a liquid flowing over the liquid containing space of the drip pan case , The supply piping portion is connected to the drip pan and the liquid supply means and supplies the liquid directly to the drip pan A first supply pipe; And a second supply pipe connected to the drip pan case and the liquid supply unit and provided to directly supply the liquid to the drip pan case.

Preferably, the flow rate sensing means is provided inside the supply pipe portion and is provided to rotate or rise according to the flow inside the supply pipe portion. And a flow rate sensor unit installed at a lower portion of the flow rate sensing unit and configured to transmit flow information inside the supply pipe unit to the flow rate control unit.

More preferably, the flow rate sensing means includes: a propeller that rotates and rises by flow, changes the amount of rotation and the amount of increase by the amount of flow, and descends by self weight when descending, and a propeller that supports the propeller, And a propeller frame which is fixedly inserted into the propeller frame and is provided so as to be raised or lowered in the same manner as the propeller, wherein the flow sensor unit comprises: a sensor touch pad attached to a lower portion of the propeller; And a sensor installed at a lower portion of the sensor touch band, and may be provided to transmit flow information depending on whether the sensor touch pad is in contact with or detached from the sensing sensor due to a change in the position of the propeller.

Preferably, the flow rate sensing means includes a sliding groove on an inner wall of the supply pipe portion so that the propeller can be raised and lowered inside the supply pipe portion; And a sliding guide member which is inserted into the sliding groove at one side and is fixed to both ends of the propeller frame at the other side and moves in the same manner as the vertical movement of the propeller.

More preferably, the flow rate sensing means and the flow rate sensor portion are disposed in the first supply pipe, and when the flow rate of the first supply pipe detected by the flow rate sensor means is less than a reference value, Wherein the second overflow guiding tube of the drip pan case is disposed on the same or higher position as the first overflow guiding tube and the liquid supplied to the second supply pipe is supplied to the first overflow guiding tube And may be provided to cover the guiding tube and flow into the drip pan.

In one embodiment of the roll coating apparatus according to the present invention, a double-structure drip pan apparatus, a roll rotating in a strip coating process, and a discharge pipe connected to the discharge pipe unit, And a circulation tank installed to receive the liquid from which the foreign matter has been removed by the foreign matter filter and to supply or store the liquid from which the foreign matter has been removed, through the supply pipe portion .

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According to an embodiment of the present invention, the flow information to the inside of the drip pan can be known through the flow rate sensing means. When the liquid inside the drip pan is insufficient by the control of the flow rate control means, There is an effect that it can supply. As a result, it is possible to prevent the liquid level shortage inside the drip pan in advance, thereby preventing defects of the product.

Further, by providing the piping structure in which the first and second overflow guiding pipes are provided, liquid flowing in excess of the liquid containing space of the drip pan or drip pan case can be discharged to the foreign matter filter before the resin gel is generated have. Therefore, it is possible to prevent surface defects and resin clogging which are caused by the resin gel (gel) adhering to the surface of the strip.

In other words, it is possible to prevent an equipment failure or the like in advance, thereby increasing the production efficiency, thereby contributing to an improvement in product productivity.

Figure 1 schematically illustrates a conventional plating process line post-treatment resin coating process.
2 is an enlarged partial perspective view of the 'A' portion of FIG.
FIG. 3 is a cross-sectional view of a double-structure drip pan device and a roll coating device according to an embodiment of the present invention.
4 is a plan view of a dual structure drip pan device and a roll coating device according to an embodiment of the present invention.
5A is an enlarged schematic view of the portion 'B' in FIG.
5B is an enlarged schematic view of the portion 'D' of FIG. 5A.
6 is an enlarged view of a portion 'C' in FIG.
7A shows the state of the flow rate sensing means 90 and the flow rate sensor portion 100 when no liquid is supplied to the supply piping portion 60 of the present invention.
7B shows the state of the flow rate sensing means 90 and the flow rate sensor portion 100 when the liquid is supplied to the supply pipe portion 60 of the present invention but is not a normal flow rate.
7C shows the state of the flow rate sensing means 90 and the flow rate sensor portion 100 when the liquid is supplied to the supply pipe portion 60 of the present invention and the flow rate is normal.
8A shows that liquid is supplied to the drip pan 40 through the first supply piping 61 and the overflowing liquid drops to the drip pan case 50 through the first overflow guiding conduit 80, And is moved to the discharge pipe portion 70 by the pipe 71. As shown in Fig.
8B shows that the liquid is supplied to the drip pan case 50 through the second supply pipe 63 and the drip pan 40 is supplied to cover the first overflow guiding pipe 80, And is moved to the discharge pipe portion 70 by the overflow guiding pipe 81. [
Fig. 8C shows a state in which the roll 30 is separated from the strip 1 in the state of Fig. 8A and no resin coating occurs.
FIG. 8D shows a state in which there is no liquid flow, and the roll coating apparatus according to the present invention moves downward and the roll 30 can be replaced.
FIG. 9 is a schematic view of a post-treatment resin coating process of a plating process line according to an embodiment of the double-structure drip pan and roll coating apparatus of the present invention.

The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

In order to facilitate understanding of the embodiments described below, elements denoted by the same reference numerals in the accompanying drawings are the same elements, and a description of elements and techniques well known in the prior art will be omitted in order to clarify the gist of the present invention .

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

3 to 5B, the present invention is arranged at a lower portion of a rotating roll 30, and a predetermined area of the rotating roll 30 is locked so that the roll 30 is rotated by liquid (40) having a liquid containing space (S1) so as to apply a liquid to the liquid.

The drip pan case 50 has a liquid receiving space S2 of a certain level as the drip pan 40 and is installed outside the drip pan 40 to receive the drip pan 40. [ ). At this time, the liquid containing space S2 is provided to receive the liquid that overflows the liquid containing space S1 of the drip pan. As such a drip pan 40 and a drip pan case 50 for receiving the drip pan 40 from the outside, the present invention has a dual drip pan structure.

At this time, the supplied liquid may be the resin solution 11 applied to the coating roll in the post-treatment resin coating process of the plating process line, and any other liquid supplied by using the rotating roll may be possible to be.

The double-structure drip pan device of the present invention can receive the liquid from outside through a certain means, which serves as liquid supply means. Further, the double-structure drip pan device of the present invention can discharge the liquid to the outside , And the means for post-treating the discharged liquid may be liquid discharging means.

The present invention is also characterized in that it comprises a supply pipe portion 60 provided to supply liquid from the liquid supply means to the drip pan 40 or the drip pan case 50, And a discharge piping unit 70 connected to the drip pan case 50 to discharge the liquid. Therefore, it is a clear fact that the supply pipe portion 60 and the discharge pipe portion 70 can flow between the double-structure drip pan device and the liquid supply means and the liquid discharge means.

On the other hand, the liquid accommodation space S1 of the drip pan has a rectangular parallelepiped shape, and the upper surface is opened. However, it can be modified depending on the usage environment such as the shape and size of the roll.

As shown in FIG. 5A ', a protruding portion or a channel hole is formed in the rim of the opened upper surface to allow liquid exceeding the accommodation space S1 to fall down to the inner bottom of the drip pan case 50 . In particular, as shown in FIG. 5B, a semicircular tube having an open upper portion can be provided on the undersurface of the concavo-convex portion or the flowpath to induce a smooth flow. And at least one guiding tube 80 is provided to guide the liquid flowing in excess of the drip pan 40 to be discharged to the drip pan case 50.

The liquid containing space S2 of the drip pan case 50 shown in Figs. 3 and 4 can receive the liquid flowing along the first overflow guiding tube 80. As shown in Fig. Further, the drip pan case 50 includes a second overflow guiding pipe 81 so that the liquid flowing in the liquid containing space S2 does not overflow to the outside but flows to the liquid discharging means.

Hereinafter, the flow rate sensing means 90 provided inside the supply piping portion 60 of the dual structure drip pan device of the present invention will be described in detail with reference to the drip pan structure and the piping structure of the dual structure drip pan device of the present invention. And the structure of the flow rate sensor unit 100 will be described.

FIG. 6 is an enlarged view of a portion 'C' in FIG. 3, which is provided inside the supply pipe portion 60 as shown in FIG. 3 and is provided to rotate or rise according to the internal flow of the supply pipe portion 60 And the wander detection means 90 shown in Fig.

A first flange 95a is provided on the upper portion of the flow sensing means 90 and a second flange 95b is provided on the lower portion of the flow sensing means 90 to secure a flow sensing space in the supply pipe portion 60. The first flow housing 96a and the second flow housing 96b having a hollow portion having the same size as that of the hollow portion are provided in the first and second flanges 95a and 95b, Respectively, and are fixed to the first and second flanges 95a and 95b, respectively.

In addition, the flow sensing means 90 includes a propeller 91 that is rotated or elevated by flow. The propeller 91 is provided so as to be lowered by the weight of the propeller 91 when the amount of rotation and the amount of elevation change due to the flow rate inside the supply piping 60, The propeller 91 is fixedly inserted into a central portion of a propeller frame 92 which is supported and fixed to the propeller 91 and moves up or down like the propeller 91.

A sliding groove 93 and a sliding guide member 93 inserted into the sliding groove 93 are formed on the inner wall of the supply pipe portion 60 so that the propeller 91 and the propeller frame 92 can be raised and lowered. 94 are provided. One side of the sliding guide member 94 is inserted into the sliding groove 93 and the other side is fixed to both ends of the propeller frame 92 so that the propeller 91 moves in the same manner as the vertical position of the propeller 91 do.

The flow rate sensor unit 100 installed below the flow rate sensing unit 90 and adapted to transmit flow information inside the supply pipe unit 60 to the flow rate control unit 130 includes the propeller 91 A sensor touch pad 101 attached to a lower portion of the sensor touch pad and a detection sensor 102 installed to face the lower portion of the sensor touch pad. The sensing sensor 102 is provided on the same line as the second flow housing 96b and is provided with a flow ring 97 having a plurality of flow ring holes 98 penetrated to allow flow inside the supply pipe portion 60, As shown in FIG.

At this time, the propeller 91 will be raised or lowered depending on the flow rate inside the supply piping 60, which determines whether or not the sensor touch pad 101 and the detection sensor 102 are contacted or separated. Here, contact or separation between the sensor touch pad 101 and the detection sensor 102 is transmitted to the flow rate control means 130.

7B to 7C, if the flow inside the supply piping 60 is maintained at a certain level, the propeller 91 rotates itself and the sliding groove 93 and the sliding guide member 94 are rotated, . At this time, the sensor touch pad 101 and the detection sensor 102 are also not in contact with each other, and the separated state is maintained.

However, when there is no flow inside the supply piping 60 as shown in FIG. 7A, the propeller 91 is lowered due to its own weight, so that the sensor touch pad 101 and the detection sensor 102 are brought into contact with each other. At this time, the signal of the sensor unit is transmitted to the flow rate control unit 130.

The flow rate control means 130 may follow the format of a conventional touch sensor control unit for transmitting an output signal generated in response to an input signal from a touch sensor to a main CPU by using a predetermined communication, It is preferable that the switch is provided as a switch capable of on / off, but it can be modified in any way depending on the use environment.

The flow rate sensing unit 90 and the flow rate sensor unit 100 are installed inside the supply pipe unit 60 and the first supply pipe 61 And when the flow rate control means 130 detects the flow rate of the first supply pipe 61 detected by the flow rate sensor portion 100 is not more than the proper reference value, the liquid is supplied to the second supply pipe 63 It is preferable to supply them.

In the dual-structure drip pan device of the present invention, the second overflow guiding pipe 81 of the drip pan case 50 is positioned at the same or higher position than the first overflow guiding pipe 80 So that the liquid supplied to the second supply pipe 63 covers the first overflow guiding pipe 80 and flows directly into the drip pan 40 through the upper open face .

Hereinafter, the roll coating apparatus including the double-structure drip pan apparatus will be described in detail. The detailed structure and operation principle of a conventional roll coating apparatus are well known in the art, and are disclosed in, for example, Patent Document 1 or Patent Document 2 A detailed description thereof will be omitted and the operation of the dual structure drip pan device and the roll coating device of the present invention will be described with reference to the accompanying drawings.

First, in operation of the double-structure drip pan device and the roll coating device described below, the liquid discharged through the discharge pipe portion 70 is moved to the foreign matter filter 20, The same is applied to each case in which the liquid is moved to the circulation tank 25 for storing and storing the clean liquid from which foreign substances have been removed along the portion 70 and then supplied again to the present apparatus by the supply piping portion 60 do.

8A shows a state in which the liquid is supplied to the drip pan 40 through the first supply pipe 61. At this time, the first automatic valve 250 is in a closed state and the second automatic valve 251 is in an open state.

The liquid exceeding the liquid containing space S1 of the drip pan 40 drops to the inner bottom of the drip pan case 50 through the first overflow guiding pipe 80. [ The liquid falling on the inner bottom of the drip pan case (50) is discharged to the discharge pipe portion (70) by the case discharge pipe (71). At this time, the third automatic valve 252 is in an open state.

8B shows a state in which the first automatic valve 250 is opened and the second automatic valve 251 is closed so that the liquid is supplied through the second supply pipe 63. That is, when the liquid supplied to the drip pan case 50 exceeds the liquid containing space S2 of the drip pan case, the first overflow guiding pipe 80 is covered, and the drip pan 40, (S1). At this time, the third automatic valve 252 is closed so that liquid exceeding the liquid containing space S2 of the drip pan case 50 is discharged through the second overflow guiding pipe 81, To the foreign matter filter 20.

8A and 8B. In the case as described above, the apparatus operates normally and the resin solution 11 is smoothly supplied. When the roll 30 is rotated, the resin solution 11 is uniformly applied And the coating of the strip 1 is smoothly progressed.

However, referring to FIG. 8C, it can be seen that the coating of the strip 1 is stopped due to the movement of the roll 30. That is, FIG. 8C shows a state in which, when a problem situation such as a flow abnormality in the supply piping section 60 is recognized in the state of FIG. 8A, the operator who is aware of the problem situation by the signal of the flow rate control means 130 The roll 30 is moved away from the strip 1, so that the coating of the resin does not occur.

In the case of Fig. 8D, the resin solution 11 is not circulated in the pumped state in the state of Fig. 8C, and the necessity of replacing the roll 30 arises. In order to replace the roll 30, The drip pan device and the roll coating device of the strip 1 descend downward and move to the left so as to be separated from the strip 1.

In order to enable the double-structure drip pan apparatus and the roll coating apparatus to move in the left-right direction and the up-down direction, the support frame 220 can be supported and fixed at the lowermost end And the third frame 212 may be fixed to the upper portion of the support frame.

A stepping motor 210 and a screw shaft 205 are installed on the upper portion of the third frame 212 so that the apparatus can be raised or lowered by the interaction between the stepping motor 210 and the screw shaft 205 . That is, the stepping motor 210 is connected to the screw shaft 205, the screw shaft 205 is fixed and supported by the screw housing 201, and the first frame 206 Is brought into contact with and fixed to the bottom of the bottom of the drip pan case (50).

The screw shaft 205 is fixed to the side of the drip pan case 50 and the stepping motor 210 is fixed to the side of the third frame 212 by the fixing bracket 211, And is fixed to the support frame 220. Accordingly, the screw shaft 205 can be rotated according to the operation of the stepping motor 210, and the apparatus can be moved by the rotation of the screw shaft 205.

In order to prevent the piping structure from being affected by the operation of the present apparatus, the supply piping unit 60 includes a first expanded piping 230 that can be expanded and contracted, and the discharge piping unit 70 is also expanded and contracted The second expanded pipe 231 may be provided.

9, the supply pump may be provided as the first supply pump 300 and the second supply pump 310, respectively, so that replacement pumping is enabled. As a result, pipe clogging or piping failure ) Surface defects can be prevented in advance.

By the operation of the double-structure drip pan apparatus and the roll coating apparatus of the present invention described above, the resin solution 11 used in the post-treatment resin coating process of the plating process line is supplied to the drip pan 40 and the drip pan case 50 It is possible to induce the circulation of the resin solution 11 smoothly by preventing the resin gel 9 from being left for a long time and then being transferred to the foreign matter filter 20 immediately before the resin gel 9 is generated.

When the resin solution 11 can not be supplied into the drip pan 40, the resin solution 11 may be supplied through the drip pan case 50 to prevent the supply of the resin solution 11 from being cut off In addition, it is possible to prevent a situation in which the resin gel 9 is generated in the resin solution 11 due to the circulation of the resin solution 11 and the rapid removal of foreign matter, thereby preventing surface defects of the strip 1 It is.

It is to be understood that the present invention has been described in connection with specific embodiments of a double-structure drip pan device and a roll coating device, and that the present invention can be variously changed and modified in various forms depending on the use environment.

S1: Drip pan liquid receiving space S2: Drip pan case liquid receiving space
1: strip 2: backing roll
3: Pickup roll 4: Transfer roll
5: Applicator roll 6: Top coater equipment
7: Supply piping 8: Return piping
9: Resin gel 10: Resin coated roll drip pan
11: Resin solution 12: Bottom coater equipment
20: foreign matter filter 25: circulation tank
30: roll 40: drip pan
41: frame ring 50: drip pan case
60: supply pipe section 61: first supply pipe
63: second supply pipe 70: discharge pipe portion
71: Case discharge pipe 80: First overflow guiding pipe
81: second overflow guiding tube 90: flow rate sensing means
91: Propeller 92: Propeller frame
93: sliding groove 94: sliding guide member
95a: first flange 95b: second flange
96a: first flow housing 96b: second flow housing
97: Flowing ring 98: Flowing ring
100: Flow sensor unit 101: Sensor touch sensor
102: detection sensor 130: flow rate control means
201: screw housing 205: screw shaft
206: first frame 210: stepping motor
211: Fixing bracket 212: Third frame
220: support frame 230: first expanded pipe
231: Second expanded piping 250: First automatic valve
251: second automatic valve 252: third automatic valve
300: first supply pump 310: second supply pump

Claims (8)

A drip pan (40) including a liquid containing space (S1) so that a certain area of the roll is rotated in a locked state in a lower part of the rotating roll (30) so that liquid is supplied by rotation of the roll;
The drip pan 40 is provided outside the drip pan 40 and accommodates the drip pan 40. The drip pan 40 includes a liquid containing space S2 for receiving liquid flowing in excess of the liquid containing space S1 of the drip pan. A case 50;
A supply pipe portion 60 provided to supply liquid from the liquid supply means to the drip pan 40 or the drip pan case 50; And
And a discharge pipe unit (70) connected from the drip pan case to the liquid discharge unit, the discharge pipe unit being configured to discharge the liquid,
The drip pan (40)
The upper surface of the liquid containing space S1 which is provided so that a certain area of the roll 30 is submerged is opened and the liquid flowing in the liquid containing space S1 of the drip pan 40 And at least one first overflow guiding pipe (80) provided to guide the discharge of the drip pan case (50)
The drip pan case (50)
A second overflow guiding pipe 81 connected to the liquid discharging means so as to discharge the liquid flowing in the liquid containing space S2 of the drip pan case 50 at an upper edge of the drip pan case 50 ), ≪ / RTI >
The supply pipe portion (60)
A first supply pipe (61) connected to the drip pan (40) and the liquid supply means and provided to supply liquid directly to the drip pan (40); And
A second supply pipe (63) connected to the drip pan case (50) and the liquid supply means and provided to supply liquid directly to the drip pan case
Comprising a dual structure drip pan device.
delete delete The method according to claim 1,
A flow rate sensing means 90 provided inside the supply pipe portion 60 and adapted to rotate or rise according to the flow inside the supply pipe portion;
A flow rate sensor unit 100 provided below the flow rate sensing unit 90 and adapted to transmit flow information inside the supply pipe unit 60 to the flow rate control unit 130;
Wherein the drip pan device is a dual-structure drip pan device.
5. The apparatus according to claim 4, wherein the flow rate sensing means (90)
A propeller 91 that rotates and rises by the flow, changes the amount of rotation and the amount of increase by the flow amount, and falls by its own weight at the time of the descent;
And a propeller frame (92) supporting the propeller (91), the propeller being fixedly inserted and provided so as to be raised or lowered in the same manner as the propeller,
The flow rate sensor unit (100)
A sensor touch pad 101 attached to the lower portion of the propeller;
And a sensing sensor 102 installed at a lower portion of the sensor touch pad 101,
Wherein the flow information is transmitted by contact or separation between the sensor touch pad (101) and the detection sensor (102) due to a change in the position of the propeller (91).
6. The apparatus of claim 5, wherein the flow sensing means (90)
A sliding groove 93 is formed on the inner wall of the supply pipe portion 60 so that the propeller 91 can be raised and lowered inside the supply pipe portion 60; And
A sliding guide member 94 inserted into the sliding groove 93 at one side and fixed at both ends of the propeller frame 92 to move in the same manner as the vertical movement of the propeller 91;
Wherein the drip pan device is a dual-structure drip pan device.
5. The apparatus according to claim 4, wherein the flow sensing means (90) and the flow rate sensor portion (100) are arranged in the first supply pipe (61)
When the flow rate of the first supply pipe (61) detected by the flow rate sensor unit (100) is equal to or lower than the reference value, the liquid is supplied to the second supply pipe (63)
The second overflow guiding tube 81 of the drip pan case 50 is disposed on the same or higher position as the first overflow guiding tube 80,
So that the liquid supplied to the second supply pipe (63) flows over the first overflow guiding pipe (80) and flows into the drip pan (40).
A double-structure drip pan device as claimed in any one of claims 1 to 7,
Strip (1) The roll (30) rotating in the coating process,
A foreign matter filter 20 connected to the discharge pipe unit 70 for removing foreign substances in the liquid discharged by the discharge pipe unit 70,
A circulation tank 25 installed to receive the liquid from which the foreign substances have been removed by the foreign matter filter 20 and to store or store the liquid from which the supplied foreign substances have been removed and to supply the liquid through the supply piping 60,
. ≪ / RTI >

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