JP5409554B2 - Liquid processing equipment - Google Patents

Description

  The present invention relates to a dirty liquid tank, a solid-liquid separator, and a liquid processing apparatus using a clean liquid tank.

  Conventionally, as a vortex circulation type coolant purifier for purifying coolant liquid discharged from a processing apparatus and mixed with sludge, etc. by vortex and recirculating it to the processing apparatus, the cross section is substantially circular. A first coolant tank having a shape and containing a coolant liquid guided from the processing apparatus in a swirl state and having a discharge port for discharging from the center bottom surface; and at least a side and a lower part of the first coolant liquid tank. A second coolant liquid tank having a substantially cylindrical shape that encloses the coolant liquid in a swirl state outside the first coolant liquid tank, and communicates with the discharge port of the first coolant liquid tank below, and the discharge port A flow path for introducing the coolant liquid discharged from the coolant and introducing the coolant liquid into the second coolant liquid tank; and the second coolant A circulation path for sending a clean liquid having a high degree of cleanness near the inner wall of the liquid tank to the processing apparatus, a coolant liquid flowing through the flow path is introduced while generating a vortex, and an upper clean liquid is introduced into the second coolant liquid tank On the other hand, there is a vortex circulation type coolant liquid purification device provided with a tornado type purification device for guiding dirty liquid having a low cleanliness discharged from below to the first coolant liquid tank (see, for example, Patent Document 1).

Japanese Patent No. 38975587 (page 4-6, FIG. 1)

  However, in the above prior art, since the lower part of the first coolant liquid tank functioning as a dirty liquid tank and the second coolant liquid tank functioning as a clean liquid tank are in direct communication, the lower part of the first coolant liquid tank is used. When the pump for pumping up the dirty liquid and supplying it to the tornado type purification device stops unexpectedly due to a failure or power failure, the sludge in the dirty liquid directly flows from the lower part of the first coolant liquid tank to the second coolant liquid tank. There is a problem of inflow.

  The present invention has been made in view of such points, and an object of the present invention is to provide a liquid processing apparatus that can prevent the sludge in the dirty liquid from directly flowing from the dirty liquid tank to the clean liquid tank even when the pump is stopped. To do.

  According to the first aspect of the present invention, there is provided a dirty liquid tank that receives dirty liquid having a low cleanliness and settles sludge in the liquid, a pump for pumping up the dirty liquid from the bottom of the dirty liquid tank, and the pump A solid-liquid separator that sends out clean liquid obtained by solid-liquid separation of the pumped dirty liquid, and a part of the clean liquid that stores the clean liquid sent from the solid-liquid separator. A clean liquid tank capable of discharging the dirty liquid tank to the dirty liquid tank, a supply pump for supplying clean liquid from the clean liquid tank to a necessary location, and a movable partition provided between the dirty liquid tank and the clean liquid tank And when the liquid level of the dirty liquid tank is lower than the liquid level of the clean liquid tank, the movable partition is opened from the clean liquid tank to the dirty liquid tank. Lean liquid can be replenished, and when the liquid level of the dirty liquid tank is higher than the liquid level of the clean liquid tank, it is closed to prevent inflow of dirty liquid from the dirty liquid tank to the clean liquid tank, and When the liquid level of the dirty liquid tank exceeds the upper limit, the liquid processing apparatus has a function of causing the supernatant liquid of the dirty liquid to overflow from the dirty liquid tank to the clean liquid tank.

  According to a second aspect of the present invention, the dirty liquid tank in the liquid processing apparatus according to the first aspect is formed in a hopper shape provided with a slope portion inclined in a direction of reducing the cross-sectional area toward the bottom portion. The bottom is provided with a delivery port for sending the dirty liquid to the pump.

  According to a third aspect of the present invention, the clean liquid tank in the liquid processing apparatus according to the first or second aspect is formed in a cylindrical shape, and the clean liquid sent from the solid-liquid separator is arranged along the inner peripheral wall surface. And a circulation pump that sucks the liquid in the center of the clean liquid tank and circulates it in a direction that promotes the swirl flow of the clean liquid tank.

  According to a fourth aspect of the present invention, in the liquid processing apparatus according to the third aspect of the present invention, the circular clean liquid tank is provided with a circular plate provided in parallel from the bottom surface through a gap at the center of the cylindrical clean liquid tank. The pump sucks the liquid between the disk and the bottom surface of the clean liquid tank and circulates it in a direction that promotes the swirling flow of the clean liquid tank.

  According to the first aspect of the present invention, when the liquid level in the dirty liquid tank is lower than the liquid level in the clean liquid tank, the movable partition opens, and the clean liquid in the clean liquid tank becomes the dirty liquid. Since the tank is replenished, it is possible to prevent the occurrence of liquid shortage in the dirty liquid tank and continue the smooth operation of the pumping pump and solid-liquid separator, while the liquid level in the dirty liquid tank is clean. When the liquid level is higher than the liquid tank, the movable partition is closed to prevent the dirty liquid from flowing from the dirty liquid tank to the clean liquid tank, and the liquid level of the dirty liquid tank is If the upper limit is exceeded, the dirty liquid supernatant overflows from the dirty liquid tank that settles the sludge in the dirty liquid to the clean liquid tank, so the dirty liquid is transferred from the dirty liquid tank to the solid-liquid separator. The movable partitioning body can prevent the sludge in the liquid in the dirty liquid tank from flowing into the clean liquid tank even when the pump to be pumped up stops due to failure and the liquid level of the dirty liquid tank rises, A clean liquid having a high cleanliness in the clean liquid tank can be supplied to a necessary portion by the supply pump.

  According to the invention described in claim 2, in addition to the above-described effect, the dirty liquid tank is formed in a hopper shape provided with a slope portion inclined in a direction of reducing the cross-sectional area toward the bottom portion. In addition, since the bottom is provided with a delivery port for sending the dirty liquid to the pumping pump, sludge in the dirty liquid is efficiently collected at the bottom of the hopper-shaped dirty liquid tank, and the solid-liquid separation device is used by the pumping pump. Can be sent reliably.

  According to the invention described in claim 3, in addition to the above effect, the clean liquid sent from the solid-liquid separator is swirled along the inner peripheral wall surface of the clean liquid tank formed in the cylindrical shape. In addition, the circulation pump sucks the liquid in the center of the clean liquid tank and circulates it in a direction that promotes the swirling flow of the clean liquid tank. As the closer portion can suppress the possibility of accumulation of sludge in the liquid due to the flow of the swirling flow flowing at higher speed, the closer the portion closer to the center in the clean liquid tank the stronger the suction force of the circulation pump acts, The possibility that sludge in the liquid accumulates in the central portion in the clean liquid tank can be suppressed, and the maintainability with respect to the sludge accumulation in the clean liquid tank can be improved.

  According to the invention described in claim 4, the circulation pump includes a circular plate provided in parallel to a central portion of the cylindrical clean liquid tank through a gap from a bottom surface portion, and a bottom surface of the clean liquid tank. Since the liquid in between is sucked and circulated in the direction that promotes the swirling flow of the clean liquid tank, sludge in the liquid that is going to be deposited somewhere away from the center of the clean liquid tank is also efficient. It is possible to suppress the suction and accumulation well, and to suppress the possibility that the sludge in the liquid accumulates over the entire area of the clean liquid tank.

It is a piping diagram showing one embodiment of a liquid processing apparatus concerning the present invention. It is the II-II sectional view taken on the line of FIG. It is sectional drawing to which the movable partition of the liquid processing apparatus same as the above was expanded. It is sectional drawing which shows other embodiment of the movable partition body of a liquid processing apparatus same as the above, (a) shows the closed state of a movable partition body, (b) shows the open state of a movable partition body.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS. 1 to 3 and another embodiment shown in FIG.

  FIG. 1 shows the entire liquid processing apparatus 10, and the dirty processing liquid 10 is discharged from a machine tool 11 at the tip of a pipe 12 that discharges a dirty liquid L1 such as a low-cleanness coolant liquid containing sludge such as abrasive grains and chips. A dirty liquid tank 13 for receiving the liquid L1 and settling sludge (abrasive grains and chips) in the liquid is disposed.

  The dirty liquid tank 13 is formed in a hopper shape provided with an inclined surface portion 15 inclined in a direction to reduce the cross-sectional area toward the bottom portion 14, and the bottom portion 14 has a delivery port 16 for sending the dirty liquid L1. And a suction port of a pump 18 for pumping up the dirty liquid L1 from the bottom 14 of the dirty liquid tank 13 is connected to the delivery port 16 via a pipe 17.

  Cleanliness from which sludge such as abrasive grains and chips obtained by solid-liquid separation of the dirty liquid L1 pumped up by the pumping pump 18 is removed from the discharge port of the pumping pump 18 through the pipe 19 An inflow port 21 of a solid-liquid separation device 20 that sends out a clean liquid L2 having a high value is connected.

  This solid-liquid separation device 20 is a tornado type or cyclone type liquid purification device, and when the dirty liquid L1 is introduced from the inlet 21 into the outer cylinder 22, it is swung from the tangential direction to remove sludge in the liquid. Centrifugal separation is performed in the cylinder 22, and the clean liquid L2 is taken out by the pipe 25 from the outlet 24 provided at the upper end of the inner cylinder 23 disposed at the center of the outer cylinder 22, and the sludge is removed from the inner peripheral wall surface of the outer cylinder 22. The valve connected to the lower end of the sludge pot 26 when the sludge pot 26 is full. 27 is opened to discharge sludge to the outside.

  The pumping pump 18, the cyclonic solid-liquid separator 20, the sludge pot 26, the valve 27, the pipe 19 connecting them, and the like are integrally assembled by a frame (not shown) to constitute a liquid purification unit 28. ing.

  A clean liquid L2 sent from the solid-liquid separator 20 through the pipe 25 is stored via an external pipe 31 connected to the pipe 25, and a part of the clean liquid L2 can be discharged to the dirty liquid tank 13 A liquid tank 32 is provided integrally with the dirty liquid tank 13 as shown in FIGS.

  The clean liquid tank 32 is formed in a cylindrical shape, an opening 33 is provided in a part of the side wall, and the connection part 34 of the dirty liquid tank 13 is connected so as to surround the periphery of the opening 33. Yes. The hopper-shaped dirty liquid tank 13 is smaller than the cylindrical clean liquid tank 32.

  At the tip of the pipe 31 from the solid-liquid separation device 20, a clean liquid L2 sent from the solid-liquid separation device 20 is swung along the inner peripheral wall surface of the clean liquid tank 32 as shown in FIG. The outlet 35 is opened toward a tangential direction inscribed in the inner peripheral wall surface of the clean liquid tank 32.

  As shown in FIG. 1, a return pipe 36 is inserted in the center of the clean liquid tank 32, and the clean liquid L2 in the clean liquid tank 32 is supplied to the coolant liquid of the machine tool 11 in the return pipe 36. As shown in FIG.

  As shown in FIG. 1, a plate-shaped movable partition 41 is provided between the dirty liquid tank 13 and the clean liquid tank 32.

  As shown in FIG. 3, the movable partition 41 has an upper end portion of a plate member at the inlet portion 42 of the dirty liquid tank 13 facing the opening 33 of the clean liquid tank 32, and the dirty liquid tank 13. At a position lower than the upper edge, it is pivotally attached by a support shaft 43 spanned in the dirty liquid tank 13, and a part of the dirty liquid tank 13 is a valve at the lower part of the movable partition 41. The valve seat surface portion 44 functioning as a seat is provided so as to be able to contact and separate.

  In the movable partition 41, as shown by a two-dot chain line in FIG. 3, the liquid level L1a of the dirty liquid L1 in the dirty liquid tank 13 is lower than the liquid level L2a of the clean liquid L2 in the clean liquid tank 32. In this case, the pressure difference in the right direction acts on both surfaces of the movable partition 41 based on the liquid level difference, so that the clean from the clean liquid tank 32 to the dirty liquid tank 13 opens from the valve seat surface portion 44. Liquid L2 can be replenished, and the level of dirty liquid L1 in dirty liquid tank 13 is higher than the level of clean liquid L2 in clean liquid tank 32 as shown by the solid line in FIG. The left side pressure difference acts on both surfaces of the movable partition 41 based on the liquid level difference, so that the dirty liquid from the dirty liquid tank 13 to the clean liquid tank 32 is closed to the valve seat surface portion 44. While preventing the inflow of L1, the dirty as shown by the one-dot chain line in FIG. When the liquid level L1b of the dirty liquid L1 in the tank 13 exceeds the upper limit of the movable partition 41, it has a function of overflowing the supernatant liquid of the dirty liquid L1 from the dirty liquid tank 13 to the clean liquid tank 32. .

  As shown in FIG. 1, a pipe 51 is provided from the central portion of the clean liquid tank 32 to the vicinity of the inner peripheral wall surface of the clean liquid tank 32, and in the central portion of the clean liquid tank 32 in the pipe 51. A circulation pump 52 is provided for sucking a certain liquid and circulating it in a direction that promotes the swirling flow of the clean liquid tank 32.

  A circular plate 55 is provided in parallel to the central portion of the cylindrical clean liquid tank 32 through a gap 54 from the bottom surface 53, and the circulation pump 52 is disposed at the center of the bottom surface 53 of the clean liquid tank 32. A tangential direction of the inner peripheral wall surface that sucks in the liquid between the disk 55 and the bottom surface portion 53 of the clean liquid tank 32 from the perforated suction hole 56 and promotes the swirling flow of the clean liquid tank 32 The clean liquid L2 is discharged into the clean liquid tank 32 from the discharge port 57 opened toward the front.

  Next, the function and effect of the embodiment shown in FIGS. 1 to 3 will be described.

  A dirty liquid L1 such as a coolant liquid mixed with abrasive grains and chips discharged from the machine tool 11 is introduced into the dirty liquid tank 13, and a pumping pump 18 is supplied from a delivery port 16 at the bottom 14 of the dirty liquid tank 13. Thus, the water is pumped up to the cyclone solid-liquid separator 20. At this time, by forming the dirty liquid tank 13 into a hopper shape, and when the liquid level in the dirty liquid tank 13 is lower than the liquid level in the clean liquid tank 32, the movable partition 41 opens and the liquid in the clean liquid tank 32 Is supplied to the dirty liquid tank 13 so that sludge such as abrasive grains and chips is reliably sent to the cyclone solid-liquid separator 20 by the pumping pump 18 together with sufficient liquid.

  Then, since the sludge centrifuged from the liquid in the solid-liquid separator 20 is settled in the sludge pot 26, only the clean liquid L2 passes through the pipes 25 and 31, and is discharged into the cylindrical clean liquid tank 32. The liquid is discharged from the outlet 35 in a tangential direction inscribed in the inner peripheral wall surface of the clean liquid tank 32, and a swirling flow is formed in the clean liquid tank 32 along the inner peripheral wall surface of the clean liquid tank 32. Thereby, the accumulation of sludge is effectively suppressed by the swirling flow toward the inner peripheral wall surface in the clean liquid tank 32.

  However, the central part of the swirling flow in the clean liquid tank 32 has a weaker swirl flow than the outer peripheral part, and therefore an environment in which sludge is likely to accumulate is obtained. The liquid in the vicinity of the center is sucked from the lower part of the central part (or the upper part of the central part in some cases) by the circulation pump 52 and discharged in a tangential direction inscribed in the inner peripheral wall surface in the clean liquid tank 32. Sediment accumulation near the center of the

  Further, by providing a disc 55 in the center of the cylindrical clean liquid tank 32 with a predetermined gap 54 in parallel with the bottom surface portion 53, the disc 55 is located along the peripheral edge of the disc 55, The sludge in the liquid to be deposited at a location some distance from the center of the clean liquid tank 32 is also efficiently sucked to suppress the deposition. Due to these accumulation suppressing actions, sludge accumulation as a whole in the clean liquid tank 32 is effectively suppressed.

  In addition, the dirty liquid tank 13 having a hopper shape is provided on the outer peripheral portion of the clean liquid tank 32 having a cylindrical shape, and the two liquid tanks are partitioned by a movable partition 41 that opens and closes depending on a liquid level difference. When the liquid level of 13 is lower than the liquid level of the clean liquid tank 32, the movable partition 41 is opened, and the clean liquid L2 flows from the clean liquid tank 32 to the dirty liquid tank 13, causing a shortage of liquid in the dirty liquid tank 13. When the liquid level in the dirty liquid tank 13 becomes higher than the liquid level in the clean liquid tank 32, the movable partition 41 closes, and the overflow of the dirty liquid L1 from the dirty liquid tank 13 to the clean liquid tank 32 due to overflow However, the movable partitioning body 41 prevents sludge such as abrasive grains and chips that settle in the dirty liquid L1 from flowing from the dirty liquid tank 13 to the clean liquid tank 32.

  Accordingly, when the pump for pumping up the dirty liquid from the lower portion of the first coolant liquid tank and supplying it to the tornado type purifier is stopped unexpectedly due to a failure or a power failure, as in the prior art disclosed in Patent Document 1. The problem that the sludge in the dirty liquid directly flows into the second coolant liquid tank from the lower part of the first coolant liquid tank does not occur.

  Thus, when the liquid level in the dirty liquid tank 13 is lower than the liquid level in the clean liquid tank 32, the movable partition 41 is opened, and the clean liquid in the clean liquid tank 32 is replenished to the dirty liquid tank 13. Therefore, the occurrence of liquid shortage in the dirty liquid tank 13 can be prevented, and the smooth operation of the pumping pump 18 and the solid-liquid separator 20 can be continued.

  On the other hand, when the liquid level in the dirty liquid tank 13 is higher than the liquid level in the clean liquid tank 32, the movable partition 41 is closed, and the dirty liquid L1 flows from the dirty liquid tank 13 into the clean liquid tank 32. When the liquid level in the dirty liquid tank 13 exceeds the upper limit of the movable partition 41, the dirty liquid L1 from the dirty liquid tank 13 to settle the sludge in the dirty liquid L1 to the clean liquid tank 32. Even if the pumping pump 18 that pumps up the dirty liquid L1 from the dirty liquid tank 13 to the solid-liquid separator 20 is stopped due to a failure or the like and the liquid level of the dirty liquid tank 13 rises, The movable partition 41 can prevent the sludge in the liquid in the dirty liquid tank 13 from flowing into the clean liquid tank 32, and the clean liquid L2 in the clean liquid tank 32 is cleaned by the supply pump 37. Can be supplied where needed.

  In addition to the above effects, the dirty liquid tank 13 is formed in a hopper shape provided with a slope 15 inclined in a direction to reduce the cross-sectional area toward the bottom 14, and the dirty liquid L1 is applied to the bottom 14 thereof. Since the delivery port 16 for delivery to the pumping pump 18 is provided, the sludge in the dirty liquid L1 is efficiently collected at the bottom 14 of the hopper-shaped dirty liquid tank 13, and the solid-liquid separation device 20 is collected by the pumping pump 18. Can be sent reliably.

  In addition to the above effect, not only the clean liquid L2 sent from the solid-liquid separation device 20 is swung along the inner peripheral wall surface of the clean liquid tank 32 formed in the cylindrical shape, but also the circulation pump 52 sucks the liquid at the center of the clean liquid tank 32 and circulates it in a direction that promotes the swirling flow of the clean liquid tank 32, so that the portion closer to the inner peripheral wall surface in the clean liquid tank 32 is faster. Since it is possible to suppress the possibility of accumulation of sludge in the liquid due to the flow of the swirling flow, the suction force of the circulation pump 52 acts more strongly in the portion closer to the center in the clean liquid tank 32, so the clean liquid tank The possibility that sludge in the liquid accumulates in the central portion of the liquid 32 can be suppressed, and maintainability with respect to sludge accumulation in the clean liquid tank 32 can be improved.

  The circulation pump 52 is provided between a circular plate 55 provided in parallel to a central portion of the cylindrical clean liquid tank 32 through a gap 54 from a bottom surface part 53, and a bottom surface part 53 of the clean liquid tank 32. Since a certain liquid is sucked and circulated in a direction that promotes the swirling flow of the clean liquid tank 32, sludge in the liquid to be deposited at a location some distance from the center of the clean liquid tank 32 is also efficiently sucked. And the possibility that sludge in the liquid accumulates over the entire area of the clean liquid tank 32 can be suppressed.

  Next, another embodiment shown in FIG. 4 will be described.

  As shown in FIG. 4, a plate-shaped movable partition 61 is provided between the dirty liquid tank 13 and the clean liquid tank 32. The movable partition 61 is a valve seat ridge that functions as a valve seat on the left and right inner wall surfaces and the bottom surface in the width direction at the inlet 42 of the dirty liquid tank 13 facing the opening 33 of the clean liquid tank 32. Are formed on the left and right inner wall surfaces and the bottom surface in the width direction via recesses 63 that are equally spaced with respect to the valve seat protrusions 62, and the recesses A plate-like movable partition 61 is loosely fitted in 63 via play gaps 65 in the width direction and the front-rear direction.

  The surface of the movable partition 61 on the clean liquid tank 32 side is provided so as to be in close contact with the valve seat ridge 62 as shown in FIG. 4A, and the dirty partition of the movable partition 61 is provided. Since the spacers 66 are attached to the four corners on the surface on the liquid tank 13 side, the spacers 66 at the four corners are locked by the locking protrusions 64 as shown in FIG. In this state, the liquid in the clean liquid tank 32 can flow into the dirty liquid tank 13 through the play gap 65 in the recess 63.

  When the liquid level in the clean liquid tank 32 is higher than the liquid level in the dirty liquid tank 13, the movable partition 61 is a spacer of the movable partition 61 as shown in FIG. 66 is in an open state pressed against the locking ridge 64, allowing the clean liquid L2 to flow from the clean liquid tank 32 into the dirty liquid tank 13, and in the dirty liquid tank 13. When the liquid level is higher than the liquid level in the clean liquid tank 32, as shown in FIG. 4A, the movable partition 61 is pressed against the valve seat ridge 62 to be in a closed state. In addition, the dirty liquid L1 is prevented from flowing into the clean liquid tank 32 from the dirty liquid tank 13, and when the liquid level in the dirty liquid tank 13 exceeds the upper limit of the movable partition 61, the dirty liquid The supernatant of the dirty liquid L1 is discharged from the tank 13 into the clean liquid tank 32. And a function of flow.

  Other operational effects of the embodiment shown in FIG. 4 are the same as those of the embodiment shown in FIGS.

  The present invention has applicability to those who are involved in manufacturing or sales of liquid processing apparatuses.

L1 Dirty fluid
L2 clean liquid
10 liquid processing equipment
13 Dirty bath
14 Bottom
15 Slope
16 Outlet
18 Pumping pump
20 Solid-liquid separator
32 Clean liquid tank
37 Supply pump
41 Movable partition
52 Circulation pump
53 Bottom
54 Gap
55 disc
61 Movable partition

Claims (4)

Dirty liquid tank that accepts dirty liquid with low cleanliness and settles sludge in the liquid,
A pump for pumping up the dirty liquid from the bottom of the dirty liquid tank;
A solid-liquid separation device that sends out a clean liquid with a high degree of cleanliness obtained by solid-liquid separation of the dirty liquid pumped up by the pumping pump;
A clean liquid tank capable of storing the clean liquid sent from the solid-liquid separator and discharging a part of the clean liquid to the dirty liquid tank;
A supply pump for supplying the clean liquid from the clean liquid tank to the required location;
A movable partition provided between the dirty liquid tank and the clean liquid tank;
The movable partition opens when the liquid level of the dirty liquid tank is lower than the liquid level of the clean liquid tank, and enables the supply of clean liquid from the clean liquid tank to the dirty liquid tank. When the liquid level of the dirty liquid tank is higher than the level of the clean liquid tank, it closes to prevent the dirty liquid tank from flowing into the clean liquid tank, and when the liquid level of the dirty liquid tank exceeds the upper limit. A liquid processing apparatus comprising a function of causing the supernatant of a dirty liquid to overflow from the dirty liquid tank to the clean liquid tank. The dirty tank is
It is formed in a hopper shape provided with a slope part inclined in a direction to reduce the cross-sectional area toward the bottom part, and a delivery port for sending the dirty liquid to the pumping pump is provided at the bottom part. The liquid processing apparatus according to claim 1. The clean liquid tank is formed in a cylindrical shape, swirling the clean liquid sent from the solid-liquid separator along the inner peripheral wall surface,
The liquid processing apparatus according to claim 1, further comprising a circulation pump that sucks the liquid in the central portion of the clean liquid tank and circulates the liquid in a direction that promotes the swirling flow of the clean liquid tank. Provided with a disc provided in parallel with a gap from the bottom to the center of the cylindrical clean liquid tank,
The said circulation pump suck | inhales the liquid which exists between the said disc and the bottom face part of the said clean liquid tank, and circulates in the direction which encourages the swirl | vortex flow of the said clean liquid tank. Liquid processing equipment.

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