JP2015080735A - Magnetic filter device, liquid cleaning system, and liquid cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic filter device, a liquid cleaning system, and a liquid cleaning method which can improve filtration performance.SOLUTION: The action of magnetic force is utilized to remove through filtering the metal powder (a ferromagnetic particle) dispersed in the used coolant (liquid to be processed) in a magnetic filter device 1A (1B). The magnetic filter device 1A (1B) includes a processing vessel 6, a magnet unit 2, and nine of the magnetic yoke 41. The processing container 6 has a processing chamber S1 into which the used coolant is introduced. The magnet unit 2 is comprised such that a plurality of magnetic poles including different magnetic poles are arranged along a flow direction of the coolant and is located the outside of the processing chamber S1. The magnetic yoke 41 is disposed in the processing chamber S1, being arranged to pull in magnetic lines of force originating from each of a plurality of poles in the processing chamber S1 into a direction away from the magnet unit 2 in the processing chamber S1.

Description

  The present invention relates to a magnetic filter device, a liquid cleaning system, and a liquid cleaning method.

  A machine tool such as a honing machine or a grinding machine supplies coolant (grinding fluid, cutting fluid, etc.) stored in a supply tank to a workpiece (hereinafter referred to as a workpiece) arranged and supported in a machining section. In general, grinding is performed. And the metal grinding powder of the workpiece | work generated at the time of this grinding process is collect | recovered with a coolant. The collected used coolant is reused after being filtered by the filter device to remove the metal grinding powder.

  As a filter device for filtering metal grinding powder from this used coolant, for example, a magnetic filter device described in Patent Document 1 has been proposed.

  This magnetic filter device includes a filter medium made of a magnetic material disposed in a processing container and a magnet for magnetizing the filter medium, and metal grinding powder (ferromagnetic particles) contained in the used coolant is magnetized. It is adsorbed on the filter medium.

JP 2011-11205 A

  However, in the magnetic filter device described in Patent Document 1, the magnetic field radiated from the magnet reaches the filter medium disposed relatively close to the magnet, but the filter medium disposed relatively far from the magnet. There was a case that did not reach enough. In this case, the filter medium disposed relatively far from the magnet cannot sufficiently adsorb the metal grinding powder (ferromagnetic particles), and there is a possibility that the filtration performance may be deteriorated.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide a magnetic filter device and a liquid cleaning system capable of improving filtration performance.

(1) A magnetic filter device according to the present invention is a magnetic filter device for filtering and removing ferromagnetic particles dispersed in a liquid to be processed from the liquid to be processed by using a magnetic force action. A processing unit having a processing chamber, a plurality of magnetic poles including different magnetic poles arranged along the flow direction of the liquid to be processed and positioned outside the processing chamber, and a processing chamber One or more magnetic yokes arranged, and the magnetic yoke is arranged to draw magnetic lines of force starting from each of the plurality of magnetic poles in a direction away from the magnet unit in the processing chamber.
By the way, in the configuration in which the magnetic yoke is not disposed in the processing chamber, the lines of magnetic force increase from one magnetic pole to the other different magnetic poles through the vicinity of the magnet unit. Therefore, the strength of the magnetic field increases near the magnet unit in the processing chamber, but the strength of the magnetic field decreases at a position away from the magnet unit.
On the other hand, according to this configuration, since the magnetic yoke is arranged to draw the magnetic field lines in the direction away from the magnet unit, it is possible to prevent a decrease in the strength of the magnetic field at a position away from the magnet unit. .

(2) Further, in the magnetic filter device according to the present invention, the one or more magnetic yokes include a first magnetic yoke and a second magnetic yoke, and the first magnetic yoke is disposed in the processing chamber of the magnet unit. The second magnetic yoke is disposed in the vicinity of the first position corresponding to one magnetic pole, and the second magnetic yoke is disposed in the processing chamber near the second position corresponding to another magnetic pole of the magnet unit. The direction of the magnetic field drawn in the direction away from the magnet unit along the first magnetic yoke from one magnetic pole may be changed in the direction from the first magnetic yoke toward the second magnetic yoke in the processing chamber.
According to this configuration, the direction of the magnetic field drawn by the second magnetic yoke from one magnetic pole along the first magnetic yoke in the direction away from the magnet unit is changed from the first magnetic yoke to the second magnetic yoke in the processing chamber. Change in the direction you head. As a result, the magnetic flux density of the magnetic field from the first magnetic yoke toward the second magnetic yoke can be improved.

(3) Moreover, in the magnetic filter device according to the present invention, the magnet unit has a plurality of magnets arranged along the flow direction of the liquid to be processed, and each of the plurality of magnets is adjacent to the other. Arranged to have the same polarity as the other magnet on the magnet side, there are a plurality of the one or more magnetic yokes, and each of the plurality of magnetic yokes has a magnetic pole of each of the plurality of magnets in the flow direction of the liquid to be processed. It may be arranged in the vicinity of the position corresponding to.
According to this configuration, since the magnetic field in the flow direction of the liquid to be processed is generated from each of the plurality of magnets, the magnetic flux density of the magnetic field in the flow direction of the liquid to be processed can be improved.

(4) Further, in the magnetic filter device according to the present invention, the magnet unit further includes a plurality of magnetic yokes, and each of the plurality of magnetic yokes is disposed between two magnets adjacent in the cylinder axis direction. It may be interposed.

(5) Further, in the magnetic filter device according to the present invention, the processing container has a cylindrical body, the inside of the cylindrical body constitutes the processing chamber, and the magnet unit is disposed outside the cylindrical body. It may be what has been done.
According to this configuration, since the magnetic flux density in the processing chamber can be improved, the filtration performance can be improved.

(6) Further, in the magnetic filter device according to the present invention, the processing container has a shape in which the second cylindrical body is disposed outside the first cylindrical body, and the first cylindrical body and the second cylinder are provided. The area between the cylindrical bodies may constitute the processing chamber, and the magnet unit may be disposed inside the first cylindrical body.
According to this configuration, there is an advantage that the processing chamber can be easily enlarged.

(7) In the magnetic filter device according to the present invention, the magnetic yoke is disposed inside the processing chamber so that a flow path of the liquid to be processed is formed between the magnetic yoke unit and the magnet unit. A magnetic field line starting from each of the plurality of magnetic poles may be drawn.
According to this configuration, the magnetic yoke draws magnetic lines of force starting from each of the plurality of magnetic poles of the magnet unit. Thereby, the magnetic flux density of the magnetic field which goes to a magnetic yoke from a magnet unit can be improved.

(8) Further, the magnetic filter device according to the present invention may be made of a magnetic material and further include a filter medium disposed in the processing chamber of the processing container.
According to this configuration, the filtration performance can be improved by providing the filter medium.

(9) The liquid cleaning system according to the present invention from another viewpoint includes the magnetic filter device according to (8), a pump that supplies the liquid to be processed to the processing chamber of the processing container included in the magnetic filter device, A switching section for switching the flow path of the liquid to be processed supplied by the pump, and the processing container is located on the opposite side of the first piping communicating with the processing chamber and the first piping side of the filter medium in the processing chamber. A second piping that communicates with the processing chamber; and an air reservoir region forming portion that forms an air reservoir region in which air is accumulated on the second piping side of the filter medium in the processing chamber, and the switching unit includes a pump The flow path of the liquid to be processed supplied by the pump is compressed after switching the flow path of the liquid to be processed to pass through the first pipe and the second pipe to compress the air present in the air reservoir region. Through the second pipe By switching to push the liquid to be treated present in the processing chamber by the pressure of the compressed air present in the air reservoir region, to the outside of the processing chamber through the first pipe.
According to this configuration, the air present in the air reservoir region is compressed by switching the flow path of the liquid to be processed by controlling the switching unit. Thereafter, by switching the flow path of the liquid to be processed further in the switching unit, the liquid to be processed existing in the processing chamber is vigorously pushed out to the first pipe by the pressure of the air existing in the air reservoir region. At this time, sludge such as ferromagnetic particles adhering to the filter medium is washed away by the liquid to be treated, so that clogging of the filter medium is eliminated.

(10) In the liquid cleaning system according to the present invention, the air reservoir region forming unit may be configured by a pipe that communicates with the second pipe and protrudes into the processing chamber.
According to this configuration, the air reservoir region forming part can be simplified.

(11) In the liquid cleaning system according to the present invention, the switching unit may include a multi-way valve.

(12) Further, the liquid cleaning system according to the present invention includes a third pipe connected to the pump, a fourth pipe for the treated liquid, a discharge pipe for discharging the liquid to be processed, and the first pipe. A bypass pipe that bypasses the two pipes and the third pipe, wherein the switching unit connects the first pipe to one of the third pipe and the discharge pipe; A second three-way valve that connects the two pipes to one of the fourth pipe and the bypass pipe, and a control unit that controls the first three-way valve and the second three-way valve. By controlling the valve and connecting the first pipe to the third pipe, and by controlling the second three-way valve and connecting the second pipe to the fourth pipe, the pump goes through the first pipe and the filter medium in this order. Switch to the first flow path that flows to the second pipe, control the first three-way valve, By connecting the pipe to the third pipe and controlling the second three-way valve and connecting the second pipe to the bypass pipe, the second flow flowing from the pump into the processing chamber through the first pipe and the second pipe Switch to the passage, control the first three-way valve, connect the first pipe to the discharge pipe, control the second three-way valve, and connect the second pipe to the bypass pipe, It switches to the 3rd flow path which flows into the 1st piping through order of piping and a filter medium.

(13) The liquid cleaning method according to the present invention from another viewpoint includes a magnetic filter device according to claim 8, and a pump for supplying the liquid to be processed to the processing chamber of the processing container provided in the magnetic filter device. The process vessel is located on the opposite side of the process chamber from the first pipe side of the filter medium in the process chamber and in the process chamber. A step of forming an air reservoir region in which air is accumulated on the second piping side of the filter medium in the processing chamber, and a flow path of the liquid to be processed supplied by the pump Switching the air passing through the first pipe and the second pipe to compress the air present in the air reservoir region, and the flow path of the liquid to be treated supplied by the pump to the second pipe The By switching to so that, including the steps of extruding the treated liquid present in the processing chamber by the pressure of the compressed air present in the air reservoir region, through the first pipe to the outside of the processing chamber, the.

  ADVANTAGE OF THE INVENTION According to this invention, the magnetic filter apparatus and liquid washing system which can aim at filtration performance improvement can be provided.

It is a schematic structure figure of a liquid washing system concerning an embodiment. It is a schematic block diagram of the magnetic filter apparatus which concerns on embodiment. The magnetic yoke which concerns on embodiment is shown, (a) is a perspective view, (b) is sectional drawing. It is a block diagram of a control part concerning an embodiment. It is operation | movement explanatory drawing of the magnetic filter apparatus which concerns on embodiment. It is operation | movement explanatory drawing of the magnetic filter apparatus which concerns on a comparative example. It is performance explanatory drawing of the magnetic filter apparatus which concerns on embodiment. It is a flowchart which shows operation | movement of the control part which concerns on embodiment. It is a flowchart which shows operation | movement of the control part which concerns on embodiment. It is a flowchart which shows operation | movement of the control part which concerns on embodiment. It is operation | movement explanatory drawing of the magnetic filter apparatus which concerns on embodiment. It is operation | movement explanatory drawing of the magnetic filter apparatus which concerns on embodiment. It is operation | movement explanatory drawing of the magnetic filter apparatus which concerns on embodiment. It is a schematic block diagram of the magnetic filter apparatus which concerns on a modification. The magnetic yoke which concerns on a modification is shown, (a) is a perspective view, (b) is sectional drawing. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification. It is a schematic block diagram which shows a part of magnetic filter apparatus concerning a modification.

<Embodiment>
<1> Configuration [Overall configuration]
FIG. 1 is a schematic diagram of a fluid cleaning system according to the present embodiment.
The fluid cleaning system is a system for cleaning coolant (processed fluid) used in a machine tool 108 such as a honing machine.
The fluid cleaning system includes magnetic filter devices 1A and 1B, a pump 90, an accumulator 96, a liquid removal / solidification unit 100, a buffer tank 104, a recovery tank 106, a pressure sensor 120, and a control unit 190. Prepare.

The recovery tank 106 is for recovering the coolant (used coolant) used in the machine tool 108.
The pump 90 supplies the used coolant stored in the recovery tank 106 to the two magnetic filter devices 1A through the pipe 114.
The magnetic filter devices 1 </ b> A and 1 </ b> B clean the used coolant sent through the pipe 114. Details of the magnetic filter devices 1A and 1B will be described later.

The accumulator 96 stores the coolant (cleaned coolant) and air cleaned by the magnetic filter device 1A (1B). Here, the coolant stored in the accumulator 96 flows from the magnetic filter device 1 </ b> A (1 </ b> B) through the piping 118, and air flows through the piping 99 and the valve 98.
The buffer tank 104 stores the cleaned coolant supplied to the machine tool 108. Then, the pump 102 supplies the cleaned coolant stored in the buffer tank 104 to the machine tool 108.

The valve 98 is for switching the flow path of the cleaned coolant flowing through the pipe 118. When the valve 98 is closed, the cleaned coolant flowing through the pipe 118 flows into the accumulator 96. On the other hand, when the valve 98 is open, the cleaned coolant flows into the buffer tank 104 through the pipe 99. Air also flows into the accumulator 96 through the pipe 99.
The liquid removal / solidification unit 100 separates and solidifies sludge such as metal powder contained in the coolant flowing from the magnetic filter device 1A through the pipe 116 when cleaning the magnetic filter device 1A described later.
The pressure sensor 120 is provided in the vicinity of the pump 90 and detects the delivery pressure of the pump 90.

[Magnetic filter device]
FIG. 2 is a schematic cross-sectional view of the magnetic filter device 1A according to the present embodiment. The magnetic filter device 1B is the same as the magnetic filter device 1A.
The magnetic filter device 1A is a device for filtering and removing ferromagnetic particles (for example, metal grinding powder generated by honing) dispersed in used coolant flowing in through the pipe 114 from the coolant using a magnetic force action.
The magnetic filter device 1A mainly includes a processing vessel 6, a magnet unit 2, a filter medium 4, a magnetic yoke 41, liquid three-way valves 16, 18, air three-way valves 134, 136, a compressed air source 138, and a pressure sensor. 120.

The processing container 6 includes a substantially cylindrical second cylindrical body 62, a substantially cylindrical first cylindrical body 61, an upper lid 17 b, a lower lid 17 a, a top plate 7, and a base 9. Composed.
In the cross section perpendicular to the cylinder axis direction of the second cylindrical body 62, the outer diameter of the first cylindrical body 61 is smaller than the inner diameter of the second cylindrical body 62. And it has the shape where the 2nd cylindrical body 62 was arrange | positioned on the outer side of the 1st cylindrical body 61. FIG. The length in the cylinder axis direction of the 2nd cylindrical body 62 and the 1st cylindrical body 61 is substantially equal. The 2nd cylindrical body 62 and the 1st cylindrical body 61 are comprised, for example from nonmagnetic material, such as nonmagnetic stainless steel.

  The top plate 7 has the second cylindrical body 62 and the first cylindrical body 61 so as to close one end side (the upper end side in FIG. 2) of the second cylindrical body 62 and the first cylindrical body 61 in the cylindrical axis direction. Has been attached to. Further, the base 9 has the second cylindrical body 62 and the first cylinder so as to close the other end side (the lower end side in FIG. 2) of the second cylindrical body 62 and the first cylindrical body 61 in the cylindrical axis direction. Attached to the body 61. And the area | region between the 2nd cylindrical body 62 and the 1st cylindrical body 61 comprises process chamber S1, and the area | region inside the 1st cylindrical body 61 is magnet chamber S2 by which the magnet unit 2 is arrange | positioned. Is configured.

An air pipe 142 for introducing compressed air is provided at a portion of the top plate 7 corresponding to the inside of the first cylindrical body 61. Further, a pipe 10 for discharging the cleaned coolant from the processing chamber S1 is provided at a portion of the top plate 7 corresponding to the processing chamber S1. Here, the distal end portion 10 a of the pipe 10 protrudes downward from the lower surface of the top plate 7. A portion (protruding portion) that protrudes into the processing chamber S1 in the pipe 10 constitutes an air reservoir region forming portion that forms an air reservoir region (see A1 in FIG. 11 described later) in which air accumulates. The protruding portion communicates with a portion (second piping) other than the protruding portion in the pipe 10.
When the magnetic filter device 1A (1B) is used, an air reservoir region (see A1 in FIG. 11 described later) in which air accumulates is formed between the lower surface of the top plate 7 and the distal end portion 10a of the pipe 10 in the processing chamber S1. Is done.
A lower port 143 a is provided at a portion of the base 9 corresponding to the inside of the first cylindrical body 61. A pipe (first pipe) 8 is connected to a portion of the base 9 corresponding to the processing chamber S1. The distal end portion of the pipe 8 constitutes a processing fluid introduction / discharge port 8a for introducing the coolant into the processing chamber S1 and discharging the coolant from the processing chamber S1.

  In the processing chamber S1, a filter medium arrangement region S11 in which the filter medium 4 is arranged is formed. The filter medium 4 is made of a magnetic material. As the filter medium 4, for example, steel wool, a wire mesh, a wire, or the like can be used. Thus, by providing the filter medium 4, it is possible to improve the filtration performance of the magnetic filter device 1A.

  The upper lid 17 b and the lower lid 17 a hold the filter medium 4 in the processing container 6. The upper lid 17b and the lower lid 17a are provided with a large number of liquid passage holes of such a size that the filter medium 4 cannot pass and the coolant can pass.

  The liquid three-way valve 18 is connected to the pipes 10, 22, and 118, and switches the connection destination of the pipe 10 to the pipe 118 side or the pipe 22 side. The liquid three-way valve 18 performs a switching operation according to a control signal from the control unit 190.

  The liquid three-way valve 16 is connected to the pipes 8, 114, 116, and switches the connection destination of the pipe 8 to the pipe 114 side or the pipe 116 side. The liquid three-way valve 18 performs a switching operation according to a control signal from the control unit 190.

  The air three-way valves 134 and 136 are connected to the air pipes 135 and 137, and the connection destination of the air pipes 135 and 137 is switched to the air pipes 142 and 143 side or the open side.

The air pipes 135 and 137 are connected to a compressed air source 138.
The compressed air source 138 is composed of, for example, an air compressor.

The magnet unit 2 is arranged in an area corresponding to the filter medium arrangement area S11 inside the first cylindrical body 61 (outside the processing chamber S1). That is, the processing container 6 has a shape in which the second cylindrical body 62 is disposed outside the first cylindrical body 61, and the region between the first cylindrical body 61 and the second cylindrical body 62 is processed. The chamber S <b> 1 is configured, and the magnet unit 2 is disposed inside the first cylindrical body 61.
Thereby, there exists an advantage that process chamber S1 can be enlarged easily.

The magnet unit 2 has a substantially cylindrical shape, and includes a plurality (eight in FIG. 2) of magnets 25 and a plurality (nine in FIG. 2) of auxiliary magnetic yokes 27, 27A, and 27B. .
The sub magnetic yokes 27, 27A, 27B serve to guide the magnetic flux radiated from the magnet 25 to a magnetic yoke 41 described later. Thereby, since the magnetic flux radiated | emitted from the magnet 25 is efficiently guide | induced to the magnetic yoke 41, the loss of the magnetic flux radiated | emitted from the magnet 25 can be reduced.

  The magnet 25 and the sub magnetic yokes 27, 27A, 27B have a substantially disk shape. Here, the magnet 25 is comprised from permanent magnets, such as a neodymium magnet, for example. The auxiliary magnetic yokes 27, 27A, 27B are made of a magnetic material such as soft iron. The diameter of the sub magnetic yoke 27 is set to be slightly smaller than the inner diameter of the magnet chamber S2, and the diameter of the magnet 25 is set to be smaller than the diameter of the sub magnetic yoke 27.

Here, the plurality of magnets 25 and the plurality of sub magnetic yokes 27, 27A, 27B are arranged in an alternately stacked state. Further, two magnets 25 adjacent to each other in the central axis direction of the magnet unit 2 are arranged to have the same polarity (N pole and N pole or S pole and S pole) via the sub magnetic yoke 27. That is, the magnet unit 2 includes different magnetic poles of S pole and N pole. Here, each of the sub magnetic yokes 27, 27A, 27B is disposed in the vicinity of the position corresponding to the magnetic pole of each of the plurality of magnets 25 in the coolant flow direction.
Since the magnet unit 2 has the configuration described above, a magnetic field in the arrangement direction of the plurality of magnets 25 is generated from each of the plurality of magnets 25, so that the magnetic flux density of the magnetic field in the arrangement direction of the plurality of magnets 25 is improved. Can be made.

The magnet unit 2 is movable in the cylinder axis direction (vertical direction in FIG. 2) of the first cylindrical body 61 in the magnet chamber S2.
The magnetic yoke 41 is arranged in the filter medium arrangement region S11 in the processing chamber S1. The magnetic yoke 41 is made of a magnetic material such as soft iron. The magnetic yoke 41 is arranged to draw magnetic lines of force starting from each of the plurality of magnetic poles of the magnet unit 2 in a direction away from the magnet unit 2 in the processing chamber S1.

  Further, one magnetic yoke 41 is disposed in the vicinity of the position corresponding to one magnetic pole of the magnet unit 2 (first position) in the processing chamber S1, and the other magnetic yoke 41 is disposed in the processing chamber S1. The magnet unit 2 is disposed in the vicinity of a position (second position) corresponding to another different magnetic pole. Then, the other magnetic yoke 41 changes the direction of the magnetic field drawn from one magnetic pole along the one magnetic yoke 41 in the direction away from the magnet unit 2 from one magnetic yoke 41 to another magnetic field in the processing chamber S1. The direction is changed toward the yoke 41.

  In this case, the direction of the magnetic field that the other magnetic yoke 41 is drawn from one magnetic pole along the one magnetic yoke 41 away from the magnet unit 2 is changed from one magnetic yoke to another magnetic field in the processing chamber S1. Change in the direction toward the yoke (coolant flow direction). Thereby, the magnetic flux density of the magnetic field (magnetic field along the coolant flow direction) from one magnetic yoke 41 toward the other magnetic yoke 42 can be improved.

FIG. 3 shows a magnetic yoke 41 according to this embodiment, where (a) is a perspective view and (b) is a cross-sectional view.
The magnetic yoke 41 has a disk shape (that is, a substantially circular shape in a plan view) in which a through hole 41b having a circular shape in a plan view is formed. The inner diameter dimension of the magnetic yoke 41 is slightly larger than the outer diameter dimension of the first cylindrical body 61 of the processing container 6. The outer diameter of the magnetic yoke 41 is slightly smaller than the inner diameter of the second cylindrical body 62 of the processing container 6. And the magnetic yoke 41 is arrange | positioned in the filter medium arrangement | positioning area | region S11 in the state by which the 1st cylindrical body 61 was penetrated by the through-hole 41b. Further, the magnetic yoke 41 is formed with a plurality of through holes 41a penetrating in the thickness direction. Further, the magnetic yoke 41 is arranged so that the thickness direction thereof is along the cylinder axis direction of the processing container 6. In the state where the magnetic yoke 41 is arranged in the filter medium arrangement region S <b> 11, the filter medium 4 is filled inside the through hole 41 a of the magnetic yoke 41.

[Control unit]
The controller 190 controls the operation of the fluid cleaning system.
FIG. 4 is a block diagram of the control unit 190 according to the present embodiment.
The control unit 190 includes a CPU 200, a memory 292, and an input / output port 296. The CPU 200, the memory 292, and the input / output port 296 are connected via a bus BUS. A control program 290 is stored in the memory 292.
The input / output port 296 measures the output of the valve 98, the air three-way valves 134 and 136, the liquid three-way valves 16 and 18, the pump 90, a control element (for example, a relay) that controls the compressed air source 138, and the pressure sensor 120. A measuring element (for example, an analog-digital converter) is connected.

The CPU 200 realizes various functions of the control unit 190 by executing a control program 298 stored in the memory 292.
In addition, the control unit 190 manages information indicating which of the two magnetic filter devices 1A and 1B has been subjected to the backwash process described later. Specifically, identification information is given to each of the two magnetic filter devices 1A and 1B, and the identification information of the magnetic filter device 1A (1B) that has been subjected to the latest backwashing process was subjected to the previous backwashing process. It is stored in the memory 292 as identification information of the magnetic filter device. This identification information is updated every time the backwash process is performed.

<2> Performance of Magnetic Filter Device Next, the performance of the magnetic filter device 1A according to the present embodiment will be described. Here, the performance of the magnetic filter device 1A according to the present embodiment will be described in comparison with the magnetic filter device 1001 according to the comparative example. Since the magnetic filter device 1B is the same as the magnetic filter device 1A, description thereof is omitted here.
The magnetic filter device 1001 according to the comparative example has substantially the same configuration as the magnetic filter device 1A according to this embodiment, and is different from the magnetic filter device 1A in that there is no magnetic yoke in the processing chamber S1 of the processing container 6.
Further, in the magnetic filter device 1A according to the present embodiment and the magnetic filter device 1001 according to the comparative example, the sub magnetic yokes 27, 27A, and 27B are magnetic poles that are the starting points of the magnetic field lines of the magnetic field generated by the magnet unit 2. ing.

FIG. 5 is an operation explanatory diagram of the magnetic filter device 1A according to the present embodiment, and FIG. 6 is an operation explanatory diagram of the magnetic filter device 1001 according to the comparative example. 5 and 6 show an image of the lines of magnetic force M radiated from the peripheral surface of the sub magnetic yoke 27 of the magnet unit 2.
As shown in FIG. 6, in the magnetic filter device 1001 according to the comparative example, the density of the magnetic force lines M radiated from the peripheral surface of the sub magnetic yoke 27 is higher than that in the vicinity of the outer peripheral surface of the first cylindrical body 61. The vicinity of the inner peripheral surface of the shaped body 62 is small.

On the other hand, as shown in FIG. 5, in the magnetic filter device 1 </ b> A according to the present embodiment, the magnetic yoke 41 moves the path of the magnetic field lines generated by the magnet unit 2 (sub magnetic yoke 27) in the processing chamber S <b> 1. Is pulled away from the magnet unit 2. Thereby, the deviation of the density distribution of the magnetic force lines M radiated from the peripheral surface of the sub magnetic yoke 27 is smaller than that of the magnetic filter device 1001 according to the comparative example. That is, the difference between the density (magnetic flux density) of the magnetic force lines M near the outer peripheral surface of the first cylindrical body 61 and the density (magnetic flux density) of the magnetic force lines M near the inner peripheral surface of the second cylindrical body 62 is reduced. Yes. This indicates that the magnetic filter device 1 </ b> A has a magnetic field radiated from the magnet unit 2 reaching the vicinity of the inner peripheral surface of the second cylindrical body 62 as compared with the magnetic filter device 1001.
Further, the magnetic yoke 41 is disposed in the processing chamber S1 so as to generate a magnetic field along the cylinder axis direction of the processing container 6. The magnetic field lines M are substantially parallel to the cylinder axis of the second cylindrical body 62 both on the side close to the outer wall of the first cylindrical body 61 and on the side close to the inner wall of the second cylindrical body 62. Further, the magnetic flux density is substantially the same on the side near the outer wall of the first cylindrical body 61 and on the side near the inner wall of the second cylindrical body 62.

FIG. 7 shows a result of comparison of magnetic flux density distributions in the magnetic filter device 1A according to the present embodiment and the magnetic filter device 1001 according to the comparative example. The distribution of the magnetic flux density B in (b) is, as shown in (a), the first cylindrical body 61 (second cylindrical body 62) when the outer peripheral surface of the first cylindrical body 61 is used as a base point. The distribution in the radial direction (r) is shown. In FIG. 7B, the solid line indicates the distribution in the case of the magnetic filter device 1A according to the present embodiment, and the broken line indicates the distribution in the case of the magnetic filter device 1001 according to the comparative example. FIG. 7B shows the distribution in the central part of the two sub magnetic yokes 27 in the cylinder axis direction of the first cylindrical body 61 (second cylindrical body 62).
As shown in FIG. 7B, the magnetic filter device 1A has a magnetic flux in the radial direction (r) of the first cylindrical body 61 (second cylindrical body 62) as compared with the magnetic filter device 1001 according to the comparative example. Density of density distribution is reduced. And in the filter medium 4, the magnetic field radiated | emitted from the magnet unit 2 in the radial direction of the 1st cylindrical body 61 (2nd cylindrical body 62) is applied uniformly compared with a comparative example.

  That is, since the magnetic field applied to the filter medium 4 is uniformly applied in the radial direction of the first cylindrical body 61 (second cylindrical body 62), the first cylindrical body 61 (the first cylindrical body 61 of the filtration performance in the filter medium 4) The radial deviation of the two cylindrical body 62) can be eliminated. And especially the filtration performance in the inner peripheral surface vicinity of the 2nd cylindrical body 62 among the filter media 4 can be improved.

<3> Operation <3-1> Overall Operation Next, the operation of the control unit 190 of the liquid cleaning system according to the present embodiment will be described.
8 and 9 are flowcharts showing the operation of the control unit 190 of the liquid cleaning system according to this embodiment.
First, the control unit 190 determines whether or not to use the magnetic filter device 1A (step S1). Specifically, the control unit 190 determines based on the identification information of the magnetic filter device stored in the memory 202 whether or not the magnetic filter device 1A was backwashed last time. And the control part 190 determines with using the magnetic filter apparatus 1A, when the backwash process is performed about the magnetic filter apparatus 1A last time.

  If it is determined in step S1 that the magnetic filter device 1A is to be used (step S1: Yes), the control unit 190 controls the air three-way valves 134 and 136 of the magnetic filter device 1A to supply the air supply destination of the compressed air source 138. Is switched to the upper port 142a side (step S2). At this time, the control unit 190 controls the air three-way valves 134 and 136 for the magnetic filter device 1A to switch the connection destination of the air pipe 135 to the air pipe 142 side.

  Next, the control unit 190 operates the compressed air source 138 (step S3). At this time, in the magnetic filter device 1A, compressed air is introduced from the upper port 142a of the processing container 6 above the magnet unit 2 in the magnet chamber S2. Thereby, the magnet unit 2 is fixed below in the magnet chamber S2, and preparation for using the magnetic filter device 1A is made.

  On the other hand, when it is determined in step S1 that the magnetic filter device 1A is not used (step S1: No), the control unit 190 controls the air three-way valves 134 and 136 of the magnetic filter device 1B to control the compressed air source 138. The air supply destination is switched to the upper port 142a side (step S4). At this time, the control unit 190 controls the air three-way valves 134 and 136 for the magnetic filter device 1A to switch the connection destination of the air pipe 135 to the air pipe 142 side.

  Next, the control unit 190 operates the compressed air source 138 (step S5). At this time, in the magnetic filter device 1B, compressed air is introduced from the upper port 142a of the processing container 6 above the magnet unit 2 in the magnet chamber S2. Thereby, the magnet unit 2 is fixed below in the magnet chamber S2, and preparation for using the magnetic filter device 1B is made.

  Subsequently, the control unit 190 opens the valve 98 (step S6). Then, a flow path from the recovery tank 106 to the buffer tank 104 via the pipe 114, the magnetic filter device 1A (or the magnetic filter device 1B), and the pipe 118 is opened.

Thereafter, the control unit 190 drives the pump 90 (step S7). Then, the used coolant stored in the recovery tank 106 is sucked up by the pump 90 and sent to the processing fluid introduction / discharge port 8a of the magnetic filter device 1A (or the magnetic filter device 1B). In addition, the control part 190 abbreviate | omits the process of step S4, when the pump 90 is already driven.
Thereby, the used coolant sent to the processing fluid introduction / discharge port 8a is guided to the processing chamber S1. Then, the coolant filtered by the filter medium 4 in the processing chamber S1 flows into the buffer tank 104 through the pipe 118.

Next, the control unit 190 acquires the value of the pressure sensor 120 (step S8).
Subsequently, the control unit 190 determines whether or not the acquired value of the pressure sensor 120 is equal to or less than a predetermined value (step S9). In Step S6, when the value of pressure sensor 120 is below a predetermined value (Step S9: Yes), control part 190 performs processing of Step S5 again. On the other hand, in step S6, when the value of the pressure sensor 120 exceeds a predetermined value (step S9: No), the control unit 190 closes the valve 98 (step S11).

  Here, in the magnetic filter devices 1 </ b> A and 1 </ b> B, so-called clogging occurs as a result of trapping sludge in the filter medium 4. At this time, the delivery pressure of the pump 90 increases. Therefore, in the magnetic filter device 1A, the control unit 190 monitors the delivery pressure of the pump 90 by the pressure sensor 120, and when the delivery pressure of the pump exceeds a predetermined value, the valve 98 is closed and preparation for backwash processing described later is performed. I do.

  In step S <b> 11, the cleaned coolant that has flowed out of the magnetic filter device 1 </ b> A flows into the accumulator 96 due to the valve 98 being closed, and the cleaned coolant is accumulated in the accumulator 96.

  Thereafter, the control unit 190 determines whether or not a predetermined time for accumulating the cleaned coolant in the accumulator 96 has elapsed since the valve 98 was closed (step S12). Here, the CPU 200 of the control unit 190 measures time using, for example, a built-in timer. The predetermined time is set based on the capacity of the accumulator 96 and the amount of coolant flowing into the accumulator 96 from the magnetic filter devices 1A and 1B.

  Next, the control unit 190 determines whether or not the previous backwash process is intended for the magnetic filter device 1A (step S13). Specifically, based on the identification information of the magnetic filter device stored in the memory 292, the control unit 190 determines whether or not the previous backwash process is for the magnetic filter device 1A.

  In step S13, when the previous backwash process is intended for the magnetic filter device 1A (step S13: Yes), the control unit 190 controls the air three-way valves 134 and 136 of the magnetic filter device 1B. The air supply destination of the compressed air source 138 is switched to the lower port 143a side (step S14). At this time, the control part 190 switches the connection destination of the air piping 135 to the air piping 142 side about the magnetic filter 1B.

  Subsequently, the control unit 190 operates the compressed air source 138 (step S15). At this time, in the magnetic filter device 1B, compressed air is introduced from the lower port 143a of the processing container 6 to the lower side of the magnet unit 2 in the magnet chamber S2. Thereby, the magnet unit 2 is fixed above the magnet chamber S2, and preparation for performing the backwash process of the magnetic filter apparatus 1B is made. Then, the control part 190 performs a backwash process (step S16). The details of this backwash process will be described in detail in <3-2>.

  On the other hand, in step S13, the previous backwash process is not intended for the magnetic filter device 1A, that is, the previous backwash process is intended for the magnetic filter device 1B (step S13: Yes). . In this case, the control unit 190 controls the three-way air valves 134 and 136 of the magnetic filter device 1A to switch the passage from the compressed air source 138 to the lower port 143a side (step S17). At this time, the control unit 190 controls the air three-way valves 134 and 136 for the magnetic filter device 1B to switch the passage from the compressed air source 138 to the upper port 142a side.

Subsequently, the control unit 190 operates the compressed air source 138 (step S18). At this time, in the magnetic filter device 1A, compressed air is introduced from the lower port 143a of the processing container 6 to the lower side of the magnet unit 2 in the magnet chamber S2. Thereby, the magnet unit 2 is fixed above the magnet chamber S2, and preparation for performing the backwash process of the magnetic filter apparatus 1B is made. Then, the control part 190 performs a backwash process (step S16). The details of this backwash process will be described in detail in <3-2>.
As described above, in the liquid cleaning system according to this embodiment, the magnetic filter devices 1A and 1B are cleaned alternately.

<3-2> Backwashing process Next, the backwashing process of the liquid washing system according to the present embodiment will be described in detail.
FIG. 10 is a flowchart illustrating an operation in the backwash process of the control unit 190 according to the present embodiment. FIGS. 11 to 13 are operation explanatory diagrams of the magnetic filter device 1A (1B) according to the present embodiment.

Initially, the coolant flow path is set as a flow path (first flow path) that flows from the pump 90 to the pipe 10 via the pipe 8 and the processing chamber S1 in this order.
In this state, the control unit 190 first controls the liquid three-way valve 18 to switch the connection destination of the pipe 10 to the pipe 22 side (step S21). Then, the coolant flow path is switched from the first flow path to the flow path (second flow path) that flows from the pump 90 through both the pipe 8 and the pipe 10 into the processing chamber S1. As shown in FIG. 11, the coolant is supplied into the processing chamber S <b> 1 of the processing container 6 by the pump 90 even in the flow path through the pipe 22, the liquid three-way valve 18, and the pipe 10 (see the arrow in FIG. 11). . At this time, the coolant level is pushed upward from the tip of the pipe 10 by the delivery pressure of the pump 90. Then, the air accumulated in the air reservoir area A1 above the processing chamber S1 is compressed by the coolant.

  The control unit 190 controls the liquid three-way valve 16 to switch the connection destination of the pipe 8 communicating with the processing chamber S1 to the pipe 116 side connected to the liquid removal / solidification unit 100 (step S22). Then, the coolant flow path is switched from the second flow path to the flow path (third flow path) that flows from the pump 90 to the pipe 8 via the pipe 10 and the processing chamber S1 in this order. Then, as shown in FIG. 12, the coolant introduced into the processing chamber S1 flows out into the pipe 116 vigorously due to the pressure of the compressed air accumulated in the air reservoir region A1 (see the arrow in FIG. 12). .

Subsequently, the control unit 190 determines whether or not a predetermined time has elapsed after switching the connection destination of the pipe 8 and the connection destination of the pipe 10 (step S23). Here, the control unit 190 maintains the standby state unless a predetermined time has elapsed (step S23: No).
At this time, as shown in FIG. 13, the coolant supplied by the pump 90 continues to be supplied into the processing chamber S1 through the piping 22 (see the arrow in FIG. 13). Thereby, the filter medium 4 is washed by the coolant flowing in the direction opposite to that when the magnetic filter device 1A (1B) is used.

  If it is determined in step S23 that the predetermined time has elapsed (step S23: Yes), the control unit 190 controls the liquid three-way valve 18 to switch the connection destination of the pipe 10 to the pipe 118 side (step S24). .

  Thereafter, the control unit 190 stops the pump 90 (step S25). Note that the control unit 190 may continue to drive the pump 90 without performing the process of step S25.

  Finally, the control unit 190 controls the liquid three-way valve 16 to switch the connection destination of the pipe 8 to the pipe 114 side connected to the pump 90 (step S26).

<4> Summary By the way, in the configuration in which the magnetic yoke is not disposed in the processing chamber S1 (for example, the magnetic filter device 1001 according to the comparative example), the magnetic lines of force pass from one magnetic pole to another different magnetic pole through the vicinity of the magnet unit. There are more things to go. Accordingly, the magnetic field strength increases in the vicinity of the magnet unit 2 in the processing chamber S1, but the magnetic field strength decreases at a position away from the magnet unit 2.
On the other hand, in the magnetic filter device 1A (1B) according to the present embodiment, the magnetic yoke 41 is arranged so as to draw the lines of magnetic force in the direction away from the magnet unit 2, so that the magnetic field at a position away from the magnet unit 2 is used. It is possible to prevent a decrease in strength.
As a result, with respect to the magnetic field generated in the processing chamber S1 by each of the magnetic poles of the magnet unit, it is possible to reduce the bias of the magnetic field strength distribution in the direction orthogonal to the flow direction of the processed coolant.

  Further, the control unit 190 controls the liquid three-way valves 16 and 18 to switch the coolant flow path from the first flow path to the second flow path, thereby compressing the air present in the air reservoir region A1. Thereafter, the control unit 190 controls the liquid three-way valves 16 and 18 to switch the coolant flow path from the second flow path to the third flow path, so that the coolant existing in the processing chamber S1 is transferred to the air reservoir region A1. It is pushed out vigorously into the pipe 8 by the pressure of the existing air. At this time, sludge such as ferromagnetic particles adhering to the filter medium 4 is washed away by the coolant, so that clogging of the filter medium 4 is eliminated.

<Modification>
(1) In the magnetic filter device 1A (1B) according to the embodiment, the inside of the first cylindrical body 61 of the processing container 6 constitutes the magnet chamber S2, and the second cylindrical body 62 and the first cylindrical body 61 are included. An example in which the area between the two forms the processing chamber S1 has been described. However, the processing container is configured by the second cylindrical body 62 and the first cylindrical body 61 as in the embodiment, and the inside of the first cylindrical body 61 configures the processing chamber, The area between the cylindrical body 62 and the first cylindrical body 61 may constitute a magnet chamber. That is, the inside of the first cylindrical body 61 of the processing container 6 constitutes the processing chamber S1, and the magnet unit 2 is disposed so as to surround a part of the first cylindrical body 61 around the cylinder axis. It may be.

FIG. 14 is a schematic configuration diagram of a magnetic filter device 201 according to this modification. In FIG. 14, the same components as those in the embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
In the magnetic filter device 201, the processing container 206 is composed of a second cylindrical body 62 and a first cylindrical body 61, as in the embodiment. And the inside of the 1st cylindrical body 61 comprises process chamber S21, and the area | region between the 2nd cylindrical body 62 and the 1st cylindrical body 61 comprises magnet room S22.

A magnet unit 202 is disposed in the magnet chamber S22. The magnet unit 202 includes a plurality (eight in FIG. 14) of magnets 225 and a plurality (nine in FIG. 14) of auxiliary magnetic yokes 227, 227A, and 227B. The magnet 225 and the auxiliary magnetic yokes 227, 227A, 227B have a substantially annular shape in plan view. The inner diameter dimensions of the magnet 225 and the auxiliary magnetic yoke 27 are set to be slightly larger than the outer diameter dimension of the first cylindrical body 61.
The magnet unit 202 is movable in the cylinder axis direction (vertical direction in FIG. 14) of the first cylindrical body 61 in the magnet chamber S22 as in the embodiment.

FIG. 15 shows a magnetic yoke 241 according to the present embodiment, where (a) is a perspective view and (b) is a cross-sectional view.
The magnetic yoke 241 has a disk shape. The outer diameter dimension of the magnetic yoke 241 is slightly smaller than the inner diameter dimension of the first cylindrical body 61 of the processing container 6. The magnetic yoke 241 is formed with a plurality of through holes 241a penetrating in the thickness direction. In the state where the magnetic yoke 241 is arranged in the filter medium arrangement region S211, the filter medium 4 is filled inside the through hole 241a of the magnetic yoke 241.

  According to this configuration, since the magnetic flux density in the processing chamber S21 can be improved, the filtration performance can be improved.

(2) In the embodiment, the configuration in which the magnet unit 2 includes the sub magnetic yoke 27 has been described. However, the configuration is not necessarily limited to the configuration including the sub magnetic yoke.

FIGS. 16A to 16D are cross-sectional views showing a part of the magnetic filter device according to this modification.
The magnetic filter device shown in FIG. 16A includes a cylindrical processing container 306, two plate-shaped magnetic yokes 341a arranged inside the processing container 306 in the cylindrical axis direction of the processing container 306, and a processing A magnet unit 302 a disposed outside the container 306. Here, the two magnetic yokes 341 a are formed with through holes (not shown) penetrating in the thickness direction, and are arranged so as to close the inside of the processing container 306. Further, the filter medium 4 is disposed between the two magnetic yokes 341a.

  The magnet unit 302 a is disposed on the outer wall of the processing container 306 so as to face a part around the cylindrical axis of the processing container 306. Moreover, the magnet unit 302a is comprised from one magnet which has a substantially C-shaped shape, and each two front-end | tip parts are couple | bonded magnetically with the magnetic yoke 341a. Two tip portions of the magnet unit 302a serve as magnetic poles.

The magnetic filter device shown in FIG. 16B is different from the configuration shown in FIG. 16A in the magnet unit 302b disposed outside the processing container 306.
In the magnet unit 302b, three magnets 302b1 are arranged in a stacked state. Here, two adjacent magnets 302b1 are arranged to have the same polarity (N pole and N pole or S pole and S pole). The boundary portion between the two adjacent magnets 302 b 1 is located at a portion corresponding to the magnetic yoke 341 a on the outer wall of the processing container 306. Moreover, the boundary part of the two adjacent magnets 302b1 of the magnet unit 302b becomes a magnetic pole.

  With the arrangement of the magnetic yoke 341 a as shown in FIGS. 16A and 16B, a magnetic field is generated in the processing chamber inside the processing container 306 along the cylindrical axis direction of the processing container 306.

In the magnetic filter device shown in FIG. 16C, the arrangement of the magnetic yoke 341b is different from the configuration shown in FIG.
The magnetic yoke 341a is disposed on the opposite side of the processing container 306 from the magnet unit 302a side. The filter medium 4 is interposed between the magnetic yoke 341a and the magnet unit 302a. The filter medium 4 is fixed at a predetermined place by an upper lid (not shown) and a lower lid (not shown) as in the first embodiment. Further, the magnetic yoke 341a is disposed so as to straddle the two tip portions of the magnet unit 302a in the cylinder axis direction of the processing container 306. As a result, it is possible to reduce the leakage magnetic flux component to the outside of the magnetic yoke 341a out of the magnetic flux radiated from the two tip portions of the magnet unit 302a, so that the magnetic flux radiated from the magnet unit 302a is effectively utilized. be able to.

The magnetic filter device shown in FIG. 16 (d) has substantially the same configuration as the magnetic filter device shown in FIG. 16 (b), and the arrangement of the magnetic yoke 341b is different from the configuration shown in FIG. 16 (b).
The magnetic yoke 341a is disposed on the opposite side of the processing container 306 from the magnet unit 302b side. Further, the magnetic yoke 341b is disposed so as to straddle the boundary portion between two adjacent magnets 302b1 constituting the magnet unit 302b in the cylinder axis direction of the processing container 306. As a result, among the magnetic fluxes radiated from the boundary between the two adjacent magnets 302b1, the leakage magnetic flux component to the outside of the magnetic yoke 341a can be reduced, so that the magnetic flux radiated from the magnet unit 302a can be effectively utilized. can do.
In addition, in the arrangement of the magnetic yoke 341 b as shown in FIGS. 16C and 16D, a magnetic field that is orthogonal to the cylinder axis direction of the processing container 306 is generated in the processing chamber inside the processing container 306.

  After all, in the magnetic filter device shown in FIGS. 16C and 16D, the magnetic yoke 341b is arranged inside the processing chamber so as to form a coolant channel between the magnet unit 2 and the magnet. Magnetic field lines starting from each of the plurality of magnetic poles of the unit 2 are drawn.

  In this case, the magnetic yoke 341b draws magnetic lines of force starting from each of the plurality of magnetic poles of the magnet unit 2. Thereby, the magnetic flux density of the magnetic field which goes to the magnetic yoke 341b from the magnet unit 2 can be improved.

(3) The number of sub magnetic yokes and the arrangement of the sub magnetic yokes are not limited to the configuration of the magnetic filter device 1A (1B) according to the embodiment.
FIGS. 17A to 17F are cross-sectional views showing a part of the magnetic filter device according to this modification.
The magnetic filter device shown in FIG. 17A is substantially the same as the configuration shown in FIG. 16A described in the above (2), and the magnet unit 402a is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate. In the magnetic filter device shown in FIGS. 17A to 17F, the magnet unit is arranged to face a part around the cylinder axis of the processing container 306 on the outer wall of the processing container 306.

  As shown in FIG. 17A, the magnet unit 402a is composed of one magnet 425a and two sub magnetic yokes 427a. The two sub magnetic yokes 427a are magnetically coupled to the magnet 425a and the magnetic yoke 341a, respectively.

The magnetic filter device shown in FIG. 17B has substantially the same configuration as the magnetic filter device shown in FIG. 16A, and the magnet unit 402b is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
As shown in FIG. 17B, the magnet unit 402b includes two magnets 425b and one auxiliary magnetic yoke 427b. Each of the two magnets 425b is magnetically coupled to the magnetic yoke 341a on one end side and is magnetically coupled to the sub magnetic yoke 427b on the other end side. The two magnets 425b have opposite polarities in the radial direction perpendicular to the cylinder axis direction of the processing container 306.

The magnetic filter device shown in FIG. 17C has substantially the same configuration as the magnetic filter device shown in FIG. 16A, and the magnet unit 402c is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
As shown in FIG. 17C, the magnet unit 402c is arranged in a state where three magnets 302b1 are stacked via a sub magnetic yoke 427c. Here, two adjacent magnets (magnet 425c and magnet 425d or magnet 425d and magnet 425e) are arranged to have the same polarity (N pole and N pole or S pole and S pole). The sub magnetic yoke 427c is located in a portion corresponding to the magnetic yoke 341a on the outer wall of the processing container 306, and is magnetically coupled to the magnetic yoke 341a.

Each of the magnetic filter devices shown in FIGS. 17D to 17F is different from the configuration shown in FIGS. 17A to 17C in the arrangement of the magnetic yoke 341b.
In the magnetic filter device shown in FIGS. 17D to 17F, the magnetic yoke 341 a is arranged along a part of the inner wall of the processing container 306. The filter medium 4 is interposed between the magnetic yoke 341a and a part of the peripheral wall of the processing container 306 on the magnet unit 302a side. The filter medium 4 is fixed at a predetermined place by an upper lid (not shown) and a lower lid (not shown) as in the first embodiment.

In the magnetic filter device shown in FIGS. 17D and 17F, the magnetic yoke 341a straddles the two portions of the processing container 306 facing the sub magnetic yokes 427a and 427c in the cylinder axis direction of the processing container 306. Has been placed. In the magnetic filter device shown in FIG. 17E, the magnetic yoke 341a is arranged so as to straddle the two parts facing the magnet 425b in the processing container 306 in the cylinder axis direction of the processing container 306.
As a result, it is possible to reduce the leakage magnetic flux component to the outside of the magnetic yoke 341a out of the magnetic flux radiated from the two tip portions of the magnet unit 302a, so that the magnetic flux radiated from the magnet unit 302a is effectively utilized. be able to.

(4) In the modified examples (2) and (3), the magnet unit 2 has been described as an example in which the magnet unit 2 is disposed on the outer wall of the processing container 306 so as to face a part around the cylindrical axis of the processing container 306. The arrangement of the unit 2 is not limited to this. For example, the magnet unit may be disposed so as to surround a part of the outer wall of the processing container 306 around the cylinder axis of the processing container 306.

FIGS. 18A to 18D and FIGS. 19A to 19E are cross-sectional views showing a part of the magnetic filter device according to this modification.
The magnetic filter device shown in FIG. 18A is substantially the same as the magnetic filter device shown in FIG. 16A, and the configuration of the magnet unit 502a is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
The magnet unit 502a has a substantially annular shape surrounding the processing vessel 306 around the cylinder axis, and is composed of one permanent magnet having a substantially C-shaped cross section perpendicular to the circumferential direction. The magnet unit 502 a is arranged around the processing container 306, and two tip portions thereof are opposed to the outer wall of the processing container 306 in a cross section orthogonal to the circumferential direction. At this time, each of the two tips of the magnet unit 502a is magnetically coupled to the magnetic yoke 341a.

The magnetic filter device shown in FIG. 18B is substantially the same as the magnetic filter device shown in FIG. 16A, and the configuration of the magnet unit 502b is different from the configuration shown in FIG.
In the magnet unit 502b, three magnets 502b1 having a substantially annular shape and surrounding a part of the processing container 306 around the cylinder axis of the processing container 306 are arranged in a stacked state. Here, two adjacent magnets 302b1 are arranged to have the same polarity (N pole and N pole or S pole and S pole). A boundary portion between two adjacent magnets 502b1 is located at a portion corresponding to the magnetic yoke 341a on the outer wall of the processing container 306.

The magnetic filter device shown in FIG. 18C is substantially the same as the configuration shown in FIG. 16A, and the configuration of the magnet unit 502c is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
As shown in FIG. 18C, the magnet unit 502c includes one magnet 525c and two sub magnetic yokes 527c. Here, each of the magnet 525c and the auxiliary magnetic yoke 527c has a substantially annular shape, and surrounds a part of the outer wall of the processing container 306 around the cylindrical axis of the processing container 306. Each of the two sub magnetic yokes 527c is magnetically coupled to each of the magnet 525c and the magnetic yoke 341a.

The magnetic filter device shown in FIG. 18 (d) has substantially the same configuration as the magnetic filter device shown in FIG. 16 (a), and a magnet unit 502d is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
As shown in FIG. 18D, the magnet unit 502d is composed of two magnets 525d and one sub magnetic yoke 527d. Here, each of the magnet 525d and the auxiliary magnetic yoke 527d has a substantially annular shape, and surrounds a part of the outer wall of the processing container 306 around the cylindrical axis of the processing container 306. Each of the two magnets 525d is magnetically coupled to the magnetic yoke 341a on one end side and is magnetically coupled to the sub magnetic yoke 427b on the other end side. The two magnets 525d have opposite polarities in the radial direction perpendicular to the cylinder axis direction of the processing container 306.

In each of the magnetic filter devices shown in FIGS. 19A to 19D, the arrangement of the magnetic yoke 841a is different from the configuration shown in FIGS. 18A to 18D. In addition, about the structure similar to the structure shown to Fig.18 (a)-(d), the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.
In the magnetic filter device shown in FIGS. 19A to 19D, the magnetic yoke 841 a is arranged along the central axis of the processing container 306. The filter medium 4 is interposed between the magnetic yoke 841 a and the inner wall of the processing container 306. The filter medium 4 is fixed at a predetermined place by an upper lid (not shown) and a lower lid (not shown) as in the first embodiment.

In the magnetic filter device shown in FIG. 19B, a sub magnetic yoke may be provided between two adjacent magnets 502b1.
In the magnetic filter device shown in FIG. 19E, a substantially annular sub magnetic yoke 827a is interposed between the magnets 825a and 825b and between the magnets 825b and 825c. The magnetic yoke 841a is disposed so as to straddle two portions of the processing container 306 facing each of the two sub magnetic yokes 827a in the cylinder axis direction of the processing container 306.
In the arrangement of the magnetic yoke 841a as shown in FIGS. 19A to 19E, a magnetic field perpendicular to the cylinder axis direction of the processing container 306 is generated in the processing chamber inside the processing container 306.

(5) In the modified example (1), the magnet unit 2 has been described with the configuration including the plurality of magnets 225 and the plurality of sub magnetic yokes 27, 227A, and 227B. However, the magnet unit has a configuration including the sub magnetic yoke. It is not limited. Further, the magnet unit is not limited to a configuration including a plurality of magnets 225.

FIGS. 20A and 20B and FIGS. 21A to 21D are cross-sectional views showing a part of the magnetic filter device according to this modification.
The magnetic filter device shown in FIG. 20A includes a processing container 606, two plate-like magnetic yokes 641a, a filter medium 4, and a magnet unit 602a. Here, the processing container 606 has a cylindrical second cylindrical body 662 and a first cylindrical shape whose outer diameter is smaller than the inner diameter of the second cylindrical body 662 in a cross section that is cylindrical and orthogonal to the cylindrical axis direction. And a body 661. The two magnetic yokes 641 a are formed in a substantially annular shape, and are aligned in the cylinder axis direction of the processing container 606 in the processing chamber between the second cylindrical body 662 and the first cylindrical body 661 of the processing container 606. Is arranged in. Here, the two magnetic yokes 341a are formed with through-holes (not shown) penetrating in the thickness direction so as to close the processing chamber. Further, the filter medium 4 is arranged between the two magnetic yokes 641a.

  The magnet unit 302a includes three columnar magnets 602a1. The three magnets 602a1 are arranged in a state of being stacked in the cylinder axis direction of the first cylindrical body 661 in the magnet chamber inside the first cylindrical body 661. Further, the boundary portion between the two adjacent magnets 602a1 is located in a portion corresponding to the magnetic yoke 641a on the inner wall of the first cylindrical body 661.

The magnetic filter device shown in FIG. 20B has substantially the same configuration as the magnetic filter device shown in FIG. 20A, and the configuration of the magnet unit 602b is different. Note that components similar to those illustrated in FIG. 20A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
The magnet unit 602b includes one magnet 625b and two sub magnetic yokes 627b. Each of the two sub magnetic yokes 627b is magnetically coupled to each of the magnet 625b and the magnetic yoke 641a.
Further, in the arrangement of the magnetic yoke 641a as shown in FIGS. 20A and 20B, a magnetic field is generated in the processing chamber inside the processing container 306 along the cylinder axis direction of the processing container 306.

Each of the magnetic filter devices shown in FIGS. 21A and 21B is different from the configuration shown in FIGS. 20A and 20B in the arrangement of the magnetic yoke 941a. In addition, about the structure similar to the structure shown to Fig.20 (a) and (b), the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.
In the magnetic filter device shown in FIGS. 21A and 21B, a cylindrical magnetic yoke 941 a is disposed along the inner wall of the second cylindrical body 662 of the processing container 306. The filter medium 4 is interposed between the magnetic yoke 941a and the outer wall of the first cylindrical body 661. The filter medium 4 is fixed at a predetermined place by an upper lid (not shown) and a lower lid (not shown) as in the first embodiment.

Each of the magnetic filter devices shown in FIGS. 21C and 21D has substantially the same configuration as the magnetic filter device shown in FIGS. 21A and 21B, and the configuration of the magnet unit is different.
In the magnetic filter device shown in FIG. 21 (c), the magnet unit 902a is composed of a plurality of (five in FIG. 21 (c)) magnets 902a1. Here, the plurality of magnets 902a1 are arranged in a stacked state. Two adjacent magnets 902a1 are arranged to have the same polarity (N pole and N pole or S pole and S pole). And the cylindrical magnetic yoke 941b is arrange | positioned along the inner wall of the 2nd cylindrical body 662 so that all the boundary parts of two adjacent magnets 902a1 may be straddled.

In the magnetic filter device shown in FIG. 21 (d), the magnet unit 902b is composed of a plurality of (four in FIG. 21 (d)) magnets 925b and a plurality (five in FIG. 21 (d)) sub-magnetic yokes 927b. Has been. Here, the plurality of magnets 925b and the plurality of sub magnetic yokes 927b are arranged in an alternately stacked state. Two adjacent magnets 925b are arranged to have the same polarity (N pole and N pole or S pole and S pole). The cylindrical magnetic yoke 941b is disposed along the inner wall of the second cylindrical body 662 so as to straddle all the portions of the outer wall of the first cylindrical body 661 facing the plurality of sub magnetic yokes 927b. Yes.
Further, in the arrangement of the magnetic yokes 941a and 941b as shown in FIGS. 21A to 21D, the processing container 606 (first cylindrical body 661, second cylindrical body 662) is disposed in the processing chamber inside the processing container 606. ) Is generated perpendicular to the cylinder axis direction.

(6) In the magnetic filter device according to the embodiment and the magnetic filter device described in the modified example (1), the example including one magnet unit in which a plurality of magnets and a plurality of sub magnetic yokes are alternately stacked has been described. . However, the number of magnet units is not limited to one, and may include a plurality of magnet units.

22A and 22B are cross-sectional views showing a part of the magnetic filter device according to this modification.
The magnetic filter device shown in FIG. 22 (a) has substantially the same configuration as the magnetic filter device shown in FIG. 16 (a), and two magnetic filter devices separated from each other in the cylindrical axis direction of the processing container 306 on the outer wall of the processing container 306. The point where magnet units 702a and 702b are arranged so as to surround each part is different from the configuration shown in FIG.

  Here, the magnet unit 702a (702b) includes one magnet 725a (725b) and two sub magnetic yokes 727a (727b). Here, each of the magnet 725a (725b) and the sub magnetic yoke 727a (727b) has a substantially annular shape, and surrounds a part of the outer wall of the processing container 306 around the cylindrical axis of the processing container 306. Yes. The two sub magnetic yokes 727a (727b) are magnetically coupled to the magnets 725a (725b) and the magnetic yokes 741a (741b), respectively.

The magnetic filter device shown in FIG. 22B has substantially the same configuration as the magnetic filter device shown in FIG. 20B, and two magnetic filter devices spaced apart in the cylinder axis direction of the processing container 306 on the outer wall of the processing container 306 are provided. The point where magnet units 702c and 702d are arranged so as to surround each part is different from the configuration shown in FIG.
Here, the magnet unit 702c (702d) includes one magnet 725c (725d) and two auxiliary magnetic yokes 727c (727d). Here, each of the magnet 725c (725d) and the auxiliary magnetic yoke 727c (727d) has a substantially annular shape, and surrounds a part of the outer wall of the processing container 306 around the cylinder axis of the processing container 306. Yes. Each of the two sub magnetic yokes 727c (727d) is magnetically coupled to each of the magnet 725c (725d) and the magnetic yoke 741g (741h).

  Further, in the arrangement of the magnetic yokes 741a, 741b, 741g, and 741h as shown in FIGS. 22A and 22B, the processing containers 306 and 606 (first cylindrical bodies) are disposed in the processing chambers inside the processing containers 306 and 606. 661, the second cylindrical body 662) generates a magnetic field along the cylinder axis direction.

(7) In the embodiment and the modification, the example in which one magnetic yoke is arranged in the vicinity of the position corresponding to each magnetic pole of the magnet unit 2 in the processing chamber of the processing container has been described. However, the arrangement of the magnetic yokes is not limited to this, and for example, a plurality of magnetic yokes overlap each other in the vicinity of the position corresponding to each magnetic pole in the processing chamber in the cylinder axis direction (coolant flow direction) of the processing container. May be arranged.

(8) In the embodiment and each of the above-described modified examples, the example in which the magnetic filter device filters and removes the ferromagnetic particles contained in the liquid such as coolant has been described. However, the object to be cleaned by the magnetic filter device is not limited to a liquid, and may be a gas in which ferromagnetic particles are dispersed, for example.

(9) In the embodiment, the magnet constituting a part of the magnet unit has been described as a permanent magnet. However, the type of magnet is not limited to a permanent magnet, and may be an electromagnet.

(10) In the embodiment, the example in which the coolant is caused to flow in the direction opposite to the coolant flow direction when the magnetic filter device 1A (1B) is used when the filter medium 4 is cleaned has been described. However, the cleaning direction of the filter medium 4 is not limited to this. For example, the magnet unit 2 is disposed above the magnet chamber S2 and is in the same direction as the coolant flow direction when the magnetic filter device 1A (1B) is used. A coolant may be allowed to flow.
In this case, for example, the liquid three-way valve 18 may switch the connection destination of the pipe 10 between the pipe 118 side and the pipe (not shown) side directly connected to the liquid removal / solidification unit 100. Then, when cleaning the filter medium 4, the liquid three-way valve 18 may switch the connection destination of the pipe 10 to the pipe side connected to the liquid removal / solidification unit 100.

(11) In the embodiment, the pressure sensor 120 is provided in the vicinity of the pump 90, that is, in the piping 114 on the coolant inlet side of the magnetic filter device 1A (1B), and the example of detecting the delivery pressure of the pump 90 has been described. The pressure sensor 120 may be provided in the piping 118 on the coolant outlet side of the magnetic filter device 1A (1B). In this case, the pressure sensor 120 detects pressure loss due to the flow path constituted by the pipe 118, the valve 98, and the pipe 114, and in step S9, it may be determined whether or not it is equal to or greater than a predetermined value. Further, the pressure sensor 120 may detect a differential pressure between the coolant inlet side pipe 114 and the coolant outlet side pipe 118 of the magnetic filter device 1A (1B). And in step S9 (refer FIG. 8), what is necessary is just to determine whether it is more than predetermined value.

1A, 1B, 1001 Magnetic filter device 2, 202, 302a, 302b, 402a, 402b, 402c, 502a, 502b, 502c, 502d, 602a, 602b, 702a, 702b, 702c, 702d, 902a, 902b Magnet unit 4 Filter medium 6 , 206, 306, 606 Processing vessel 7 Top plate 8, 10, 22, 99, 114, 116, 118 Piping 8a Processing fluid introduction / discharge port 9 Base 16, 18 Liquid three-way valve 17a Upper lid 17b Lower lid 98 Valves 25, 225 , 302b1, 425a, 425b, 425c, 425d, 502b1, 525c, 525d, 602a1, 625b, 725a, 725c, 825a, 825b, 825c, 902a1, 925b Magnets 27, 27A, 27B, 227, 227A, 227B, 42 a, 427b, 427c, 527c, 527d, 627b, 727a, 727c, 827a, 927b Sub magnetic yoke 41, 241, 341a, 341b, 641a, 741a, 741g, 741h, 841a, 941a, 941b Magnetic yoke 41a, 41b, 241a Through hole 61,661 First cylindrical body 62,662 Second cylindrical body 90,102 Pump 96 Accumulator 100 Dehydrating / solidifying unit 104 Buffer tank 106 Recovery tank 108 Machine tool 120 Pressure sensor 134,136 Air three-way valve 135, 137, 142, 143 Air piping 138 Compressed air source 142a Upper port 143a Lower port 190 Control unit 292 Memory 296 I / O port 298 Control program A1 Air reservoir area S1, S21 Processing chamber S2, S2 Magnet chamber S11, S211 filter media arrangement region

(1) Magnetic filter apparatus according to the present invention is introduced to be treated flow body made of liquid or gas, filtered from the process stream object ferromagnetic particles dispersed this to be treated in the fluid by using a magnetic force After the removal, a processing container having a processing chamber from which the fluid to be processed is discharged, a filter medium made of a magnetic material and disposed in the processing chamber of the processing container, and a plurality of magnetic poles including different magnetic poles, are arranged along the flow direction of the process stream body is configured and positioned outside the processing chamber, the magnet unit on the magnetic force acting on the processing chamber from the outside of the processing chamber, is disposed in the processing chamber, And at least one magnetic yoke for drawing magnetic lines of force starting from each of the plurality of magnetic poles in a direction away from the magnet unit in the processing chamber.
By the way, in the configuration in which the magnetic yoke is not disposed in the processing chamber, the lines of magnetic force increase from one magnetic pole to the other different magnetic poles through the vicinity of the magnet unit. Therefore, the strength of the magnetic field increases near the magnet unit in the processing chamber, but the strength of the magnetic field decreases at a position away from the magnet unit.
On the other hand, the magnetic filter device of the present configuration includes the magnetic yoke that draws the magnetic field lines in the direction away from the magnet unit, and thus can prevent the strength of the magnetic field from being lowered at a position away from the magnet unit.

(3) In addition, the magnetic filter device according to the present invention, other the magnet unit has a plurality of magnets disposed along the flow direction of the object to be processed Fluid, each of the plurality of magnets, adjacent disposed in the magnet side to have the same polarity as the other magnets, the one or more magnetic yoke, there exist a plurality, each of the plurality of magnetic yoke, in the flow direction of the process stream body, a plurality of magnets It may be arranged in the vicinity of the position corresponding to the magnetic pole.
With this arrangement, since the magnetic field of the flow direction of the process stream material from each of the plurality of magnets is generated, thereby improving the magnetic field of the magnetic flux density in the flow direction of the process stream material.

(4) In addition, the magnetic filter device according to the present invention, the magnet unit further comprises a plurality of secondary magnetic yokes, each of the plurality of the sub-magnetic yoke, interposed between the two magnets mutually Ri next It may be.

(7) In addition, the magnetic filter device according to the present invention, the magnetic yoke, in the interior of the processing chamber, are arranged so the flow path of the treated stream body is formed between the magnet unit, You may draw in the magnetic force line | wire which starts each of the said some magnetic pole.
According to this configuration, the magnetic yoke draws magnetic lines of force starting from each of the plurality of magnetic poles of the magnet unit. Thereby, the magnetic flux density of the magnetic field which goes to a magnetic yoke from a magnet unit can be improved.

(8) Since the magnetic filter device according to the present invention in (1) is made of a magnetic material and further includes a filter medium disposed in the processing chamber of the processing container , the filtration performance can be improved.

(9) The liquid cleaning system according to the present invention from another viewpoint includes the magnetic filter device according to the above (1) to (7) and the processing target made of liquid into the processing chamber of the processing container provided in the magnetic filter device. comprising a pump for supplying a flow body, a switching unit which pump switches the flow path of the object to be processed fluid supply, the processing container, a first pipe which communicates with the process chamber, the filter medium in the processing chamber 1 A second pipe that is located on the opposite side of the pipe side and communicates with the processing chamber; and an air reservoir region forming section that forms an air reservoir region in which air is accumulated on the second piping side of the filter medium in the processing chamber; has, after the switching unit, the flow path of the process stream object pump supplies, compressed air present in the air reservoir region by switching so as to pass through the first pipe and the second pipe, pump the flow path of but supplies the processed fluid , By switching so as to pass through the second pipe, extruding the treated stream body present in the processing chamber by the pressure of the compressed air present in the air reservoir region, to the outside of the processing chamber through the first pipe.
According to this configuration, by controlling the switching unit switches the flow path of the process stream body, the air present in the air reservoir region is compressed. Thereafter, by switching the flow path switching unit further treated Fluid, treated Fluid present in the processing chamber, momentum is often pushed into the first pipe at a pressure of air present in the air reservoir region. At this time, sludge such as ferromagnetic particles adhering to the filter medium is, since washed away by the process stream body, clogging of the filter medium is eliminated.

(12) The liquid cleaning system according to the present invention includes a third pipe connected to the pump, and a fourth pipe for the treated liquid, a discharge pipe for discharging the treated stream body, the A bypass pipe that bypasses the second pipe and the third pipe, and the switching unit connects the first pipe to one of the third pipe and the discharge pipe; A second three-way valve that connects the second pipe to one of the fourth pipe and the bypass pipe; and a control unit that controls the first three-way valve and the second three-way valve. By controlling the three-way valve and connecting the first pipe to the third pipe, and controlling the second three-way valve and connecting the second pipe to the fourth pipe, the pump, the first pipe, and the filter medium in this order. Switch to the first flow path that flows to the second pipe via the first three-way valve, By connecting the pipe to the third pipe and controlling the second three-way valve and connecting the second pipe to the bypass pipe, the second flow flowing from the pump into the processing chamber through the first pipe and the second pipe Switch to the passage, control the first three-way valve, connect the first pipe to the discharge pipe, control the second three-way valve, and connect the second pipe to the bypass pipe, It switches to the 3rd flow path which flows into the 1st piping through order of piping and a filter medium.

(13) The liquid cleaning method according to the present invention from another viewpoint includes the magnetic filter device according to the above (1) to (7) and the object to be processed that is made of liquid in the processing chamber of the processing container provided in the magnetic filter device. a pump for supplying a processing flow body, a liquid cleaning method using said processing vessel, a first pipe which communicates with the processing chamber, opposite to the first pipe side of the filter medium in the processing chamber A second pipe located on the side and communicating with the processing chamber, and forming a reservoir area in which air is accumulated on the second piping side of the filter medium in the processing chamber; and the pump supplies wherein the flow path of the process stream material, and the step of compressing the air present in the air reservoir region by switching so as to pass through the first pipe and the second pipe, wherein the process stream wherein the pump is supplied to Body flow path , By switching so as to pass through the second pipe, the treated stream body present in the processing chamber by the pressure of the compressed air present in the air reservoir region, to the processing chamber of the outside through the first pipe Extruding.

In this case, the direction of the magnetic field that the other magnetic yoke 41 is drawn from one magnetic pole along the one magnetic yoke 41 away from the magnet unit 2 is changed from one magnetic yoke to another magnetic field in the processing chamber S1. Change in the direction toward the yoke (coolant flow direction). Thereby, the magnetic flux density of the magnetic field (magnetic field along the coolant flow direction) from one magnetic yoke 41 toward the other magnetic yoke 41 can be improved.

<3> Operation <3-1> Overall Operation Next, the operation of the control unit 190 of the liquid cleaning system according to the present embodiment will be described.
8 and 9 are flowcharts showing the operation of the control unit 190 of the liquid cleaning system according to this embodiment.
First, the control unit 190 determines whether or not to use the magnetic filter device 1A (step S1). Specifically, the control unit 190, based on the identification information of the magnetic filter device is stored in the memory 2 9 2 determines whether the previously performed, the backwash process the magnetic filter device 1A. And the control part 190 determines with using the magnetic filter apparatus 1A, when the backwash process is performed about the magnetic filter apparatus 1A last time.

In step S13, when the previous backwash process is intended for the magnetic filter device 1A (step S13: Yes), the control unit 190 controls the air three-way valves 134 and 136 of the magnetic filter device 1B. The air supply destination of the compressed air source 138 is switched to the lower port 143a side (step S14). At this time, the control unit 190 switches the connection destination of the air pipe 135 to the air pipe 142 side in the magnetic filter device 1B.

Subsequently, the control unit 190 operates the compressed air source 138 (step S18). At this time, in the magnetic filter device 1A, compressed air is introduced from the lower port 143a of the processing container 6 to the lower side of the magnet unit 2 in the magnet chamber S2. Thereby, the magnet unit 2 is fixed upward in the magnet chamber S2, and preparation for performing the backwash process of the magnetic filter device 1A is made. Then, the control part 190 performs a backwash process (step S16). The details of this backwash process will be described in detail in <3-2>.
As described above, in the liquid cleaning system according to this embodiment, the magnetic filter devices 1A and 1B are cleaned alternately.

FIGS. 15A and 15B show a magnetic yoke 241 according to this modification, where FIG. 15A is a perspective view and FIG. 15B is a cross-sectional view.
The magnetic yoke 241 has a disk shape. The outer diameter dimension of the magnetic yoke 241 is slightly smaller than the inner diameter dimension of the first cylindrical body 61 of the processing container 6. The magnetic yoke 241 is formed with a plurality of through holes 241a penetrating in the thickness direction. In the state where the magnetic yoke 241 is arranged in the filter medium arrangement region S211, the filter medium 4 is filled inside the through hole 241a of the magnetic yoke 241.

In the magnetic filter device shown in FIG. 16C, the arrangement of the magnetic yoke 341b is different from the configuration shown in FIG.
Magnetic yoke 341 b is disposed on the opposite side to the magnet unit 302a side in the interior of the processing vessel 306. Then, the filter medium 4 is interposed between the magnetic yoke 341 b and the magnet unit 302a. Incidentally, the filter medium 4 is fixed in place by way of shaped on purpose similar top cover (not shown) and lower lid (not shown). In addition, the magnetic yoke 341 b is disposed so as to straddle the two tip portions of the magnet unit 302 a in the cylinder axis direction of the processing container 306. Accordingly, among the magnetic flux emanating from the two tips of the magnet unit 302a, it is possible to reduce the leakage magnetic flux component of the magnetic yoke 341 b out, effectively use the magnetic flux emanating from the magnet unit 302a can do.

The magnetic filter device shown in FIG. 16 (d) has substantially the same configuration as the magnetic filter device shown in FIG. 16 (b), and the arrangement of the magnetic yoke 341b is different from the configuration shown in FIG. 16 (b).
Magnetic yoke 341 b is disposed on the opposite side to the magnet unit 302b side in the interior of the processing vessel 306. Further, the magnetic yoke 341b is disposed so as to straddle the boundary portion between two adjacent magnets 302b1 constituting the magnet unit 302b in the cylinder axis direction of the processing container 306. Accordingly, among the magnetic flux emanating from the two boundary portions of the magnets 302b1 adjacent, it is possible to reduce the leakage magnetic flux component of the magnetic yoke 341 b outside the effective magnetic flux emanating from the magnet unit 302 b It can be used for.
In addition, in the arrangement of the magnetic yoke 341 b as shown in FIGS. 16C and 16D, a magnetic field that is orthogonal to the cylinder axis direction of the processing container 306 is generated in the processing chamber inside the processing container 306.

The magnetic filter device shown in FIG. 17C has substantially the same configuration as the magnetic filter device shown in FIG. 16A, and the magnet unit 402c is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
As shown in FIG. 17C, the magnet unit 402c is arranged in a state where three magnets 425c, 425d, and 425e are stacked via the sub magnetic yoke 427c. Here, two adjacent magnets (magnet 425c and magnet 425d or magnet 425d and magnet 425e) are arranged to have the same polarity (N pole and N pole or S pole and S pole). The sub magnetic yoke 427c is located in a portion corresponding to the magnetic yoke 341a on the outer wall of the processing container 306, and is magnetically coupled to the magnetic yoke 341a.

Each of the magnetic filter devices shown in FIGS. 17D to 17F is different from the configuration shown in FIGS. 17A to 17C in the arrangement of the magnetic yoke 341b.
In the magnetic filter device shown in FIGS. 17D to 17F, the magnetic yoke 341 b is arranged along a part of the inner wall of the processing container 306. Then, a magnetic yoke 341 b, the magnet units 402a in the peripheral wall of the processing vessel 306, 402b, is the filter medium 4 between the part of 402c side is interposed. Incidentally, the filter medium 4 is fixed in place by way of shaped on purpose similar top cover (not shown) and lower lid (not shown).

In the magnetic filter device shown in FIGS. 17D and 17F, the magnetic yoke 341 b straddles two parts facing the sub magnetic yokes 427 a and 427 c in the processing container 306 in the cylindrical axis direction of the processing container 306. Is arranged. Further, in the magnetic filter device shown in FIG. 17 (e), the magnetic yoke 341 b is, in the tube axis direction of the processing vessel 306 is disposed so as to straddle two sites opposed to the magnet 425b in the processing vessel 306.
Thus, the magnet unit 402a, 402b, of the magnetic flux emanating from the two tips of 402c, it is possible to reduce the leakage magnetic flux component of the magnetic yoke 341 b outside the magnet unit 402a, 402b, from 402c The radiated magnetic flux can be used effectively.

The magnetic filter device shown in FIG. 18 (d) has substantially the same configuration as the magnetic filter device shown in FIG. 16 (a), and a magnet unit 502d is different. Note that components similar to those illustrated in FIG. 16A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
As shown in FIG. 18D, the magnet unit 502d is composed of two magnets 525d and one sub magnetic yoke 527d. Here, each of the magnet 525d and the auxiliary magnetic yoke 527d has a substantially annular shape, and surrounds a part of the outer wall of the processing container 306 around the cylindrical axis of the processing container 306. Each of the two magnets 525d is magnetically coupled to the magnetic yoke 341a on one end side and is magnetically coupled to the sub magnetic yoke 527d on the other end side. The two magnets 525d have opposite polarities in the radial direction perpendicular to the cylinder axis direction of the processing container 306.

In each of the magnetic filter devices shown in FIGS. 19A to 19D, the arrangement of the magnetic yoke 841a is different from the configuration shown in FIGS. 18A to 18D. In addition, about the structure similar to the structure shown to Fig.18 (a)-(d), the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.
In the magnetic filter device shown in FIGS. 19A to 19D, the magnetic yoke 841 a is arranged along the central axis of the processing container 306. The filter medium 4 is interposed between the magnetic yoke 841 a and the inner wall of the processing container 306. Incidentally, the filter medium 4 is fixed in place by way of shaped on purpose similar top cover (not shown) and lower lid (not shown).

FIGS. 20A and 20B and FIGS. 21A to 21D are cross-sectional views showing a part of the magnetic filter device according to this modification.
The magnetic filter device shown in FIG. 20A includes a processing container 606, two plate-like magnetic yokes 641a, a filter medium 4, and a magnet unit 602a. Here, the processing container 606 has a cylindrical second cylindrical body 662 and a first cylindrical shape whose outer diameter is smaller than the inner diameter of the second cylindrical body 662 in a cross section that is cylindrical and orthogonal to the cylindrical axis direction. And a body 661. The two magnetic yokes 641 a are formed in a substantially annular shape, and are aligned in the cylinder axis direction of the processing container 606 in the processing chamber between the second cylindrical body 662 and the first cylindrical body 661 of the processing container 606. Is arranged in. Here, the two magnetic yokes 6 41a, through hole penetrating in the thickness direction (not shown) are formed, are arranged so as to close the process chamber. Further, the filter medium 4 is arranged between the two magnetic yokes 641a.

Magnet unit 6 02a is composed of three cylindrical magnets 602A1. The three magnets 602a1 are arranged in a state of being stacked in the cylinder axis direction of the first cylindrical body 661 in the magnet chamber inside the first cylindrical body 661. Further, the boundary portion between the two adjacent magnets 602a1 is located in a portion corresponding to the magnetic yoke 641a on the inner wall of the first cylindrical body 661.

The magnetic filter device shown in FIG. 20B has substantially the same configuration as the magnetic filter device shown in FIG. 20A, and the configuration of the magnet unit 602b is different. Note that components similar to those illustrated in FIG. 20A are denoted by the same reference numerals, and description thereof is omitted as appropriate.
The magnet unit 602b includes one magnet 625b and two sub magnetic yokes 627b. Each of the two sub magnetic yokes 627b is magnetically coupled to each of the magnet 625b and the magnetic yoke 641a.
Further, in the arrangement of the magnetic yoke 641a as shown in FIG. 20 (a) and (b), the magnetic field along the tube axis direction of the processing container 6 06 inside the processing chamber of the processing chamber 6 06 occurs.

Each of the magnetic filter devices shown in FIGS. 21A and 21B is different from the configuration shown in FIGS. 20A and 20B in the arrangement of the magnetic yoke 941a. In addition, about the structure similar to the structure shown to Fig.20 (a) and (b), the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.
A magnetic filter device shown in FIG. 21 (a) and (b), a cylindrical magnetic yoke 941a are arranged in line with the inner wall of the second cylindrical body 662 of the processing chamber 6 06. The filter medium 4 is interposed between the magnetic yoke 941a and the outer wall of the first cylindrical body 661. Incidentally, the filter medium 4 is fixed in place by way of shaped on purpose similar top cover (not shown) and lower lid (not shown).

The magnetic filter device shown in FIG. 22 (b) has substantially the same configuration as the magnetic filter device shown in FIG. 20 (b), in the outer wall of the processing container 6 06, spaced in the cylinder axis direction of the processing container 6 06 The point where magnet units 702c and 702d are arranged so as to surround each of the two parts is different from the configuration shown in FIG.
Here, the magnet unit 702c (702d) includes one magnet 725c (725d) and two auxiliary magnetic yokes 727c (727d). Here, the magnet 725c (725d) and the secondary magnetic yoke 727c (727d) are both have a substantially circular plate shape. Each of the two sub magnetic yokes 727c (727d) is magnetically coupled to each of the magnet 725c (725d) and the magnetic yoke 741g (741h).

Claims (13)

A magnetic filter device for filtering and removing ferromagnetic particles dispersed in a liquid to be processed from the liquid to be processed by using a magnetic force action,
A processing container having a processing chamber into which the liquid to be processed is introduced;
A plurality of magnetic poles including different magnetic poles are arranged along the flow direction of the liquid to be processed and are configured to be located outside the processing chamber; and
One or more magnetic yokes disposed in the processing chamber,
The magnetic yoke is
A magnetic filter device arranged to draw magnetic lines of force starting from each of the plurality of magnetic poles in a direction away from the magnet unit in the processing chamber. The one or more magnetic yokes include a first magnetic yoke and a second magnetic yoke,
The first magnetic yoke is disposed in the processing chamber in the vicinity of a first position corresponding to one magnetic pole of the magnet unit,
The second magnetic yoke is disposed in the processing chamber in the vicinity of a second position corresponding to another different magnetic pole of the magnet unit;
The second magnetic yoke has a direction of a magnetic field drawn in a direction away from the magnet unit along the first magnetic yoke from the one magnetic pole, and the second magnetic yoke moves from the first magnetic yoke to the second magnetic yoke in the processing chamber. The magnetic filter device according to claim 1, wherein the magnetic filter device is changed in a direction toward. The magnet unit has a plurality of magnets arranged along the flow direction of the liquid to be treated,
Each of the plurality of magnets is arranged to have the same polarity as the other magnets on the other adjacent magnet side,
There are a plurality of the one or more magnetic yokes,
3. The magnetic filter device according to claim 1, wherein each of the plurality of magnetic yokes is disposed in the vicinity of a position corresponding to a magnetic pole of each of the plurality of magnets in a flow direction of the liquid to be processed. The magnet unit further includes a plurality of magnetic yokes,
The magnetic filter device according to claim 3, wherein each of the plurality of magnetic yokes is interposed between two magnets adjacent in the cylinder axis direction. The said processing container has a cylindrical body, the inner side of the said cylindrical body comprises the said process chamber, The said magnet unit is arrange | positioned on the outer side of the said cylindrical body. 2. A magnetic filter device according to claim 1. The processing container has a shape in which a second cylindrical body is disposed outside the first cylindrical body, and a region between the first cylindrical body and the second cylindrical body constitutes the processing chamber. And
The magnetic filter device according to any one of claims 1 to 4, wherein the magnet unit is disposed inside the first cylindrical body. The magnetic yoke is disposed inside the processing chamber so that a flow path of the liquid to be processed is formed between the magnetic yoke and the magnetic unit, and draws magnetic lines of force starting from each of the plurality of magnetic poles. The magnetic filter device described. The magnetic filter device according to any one of claims 1 to 7, further comprising a filter medium made of a magnetic material and disposed in the processing chamber of the processing container. A magnetic filter device according to claim 8;
A pump for supplying the liquid to be processed to the processing chamber of the processing container provided in the magnetic filter device;
A switching unit that switches a flow path of the liquid to be processed supplied by the pump, and
The processing container is
A first pipe communicating with the processing chamber;
A second pipe located on the opposite side to the first pipe side of the filter medium in the processing chamber and communicating with the processing chamber;
An air reservoir region forming part that forms an air reservoir region in which air is accumulated on the second pipe side of the filter medium in the processing chamber,
The switching unit is
After compressing the air present in the air reservoir region by switching the flow path of the liquid to be treated supplied by the pump so as to pass through the first pipe and the second pipe,
By switching the flow path of the liquid to be processed supplied by the pump so as to pass through the second pipe, the liquid to be processed existing in the processing chamber by the pressure of compressed air existing in the air reservoir region A liquid cleaning system that pushes out the outside of the processing chamber through the first pipe. The liquid cleaning system according to claim 9, wherein the air reservoir region forming unit includes a pipe that communicates with the second pipe and protrudes into the processing chamber. The liquid cleaning system according to claim 9, wherein the switching unit includes a multi-way valve. A third pipe connected to the pump;
A fourth pipe for the treated liquid;
A discharge pipe for discharging the liquid to be treated;
A bypass pipe that bypasses the second pipe and the third pipe;
The switching unit is
A first three-way valve connecting the first pipe to one of the third pipe and the discharge pipe;
A second three-way valve connecting the second pipe to either the fourth pipe or the bypass pipe;
A control unit for controlling the first three-way valve and the second three-way valve,
The control unit controls the first three-way valve to connect the first pipe to the third pipe, and also controls the second three-way valve to connect the second pipe to the fourth pipe. By switching to the first flow path from the pump to the second pipe via the first pipe and the filter medium in this order,
By controlling the first three-way valve to connect the first pipe to the third pipe and controlling the second three-way valve to connect the second pipe to the bypass pipe, the pump To a second flow path that flows into the processing chamber through the first pipe and the second pipe,
By controlling the first three-way valve and connecting the first pipe to the discharge pipe, and controlling the second three-way valve and connecting the second pipe to the bypass pipe, The liquid cleaning system according to claim 9, wherein the liquid switching system is switched to a third flow path that flows to the first pipe via the second pipe and the filter medium in this order. A magnetic filter device according to claim 8;
A liquid cleaning method using a pump for supplying the liquid to be processed to the processing chamber of the processing container provided in the magnetic filter device,
The processing container has a first pipe communicating with the processing chamber, and a second pipe communicating with the processing chamber located on the opposite side of the filtering medium in the processing chamber from the first piping side,
Forming an air reservoir region in which air is accumulated on the second pipe side of the filter medium in the processing chamber;
Compressing the air present in the air reservoir region by switching the flow path of the liquid to be treated supplied by the pump so as to pass through the first pipe and the second pipe;
By switching the flow path of the liquid to be processed supplied by the pump so as to pass through the second pipe, the liquid to be processed existing in the processing chamber by the pressure of compressed air existing in the air reservoir region Pushing out the outside of the processing chamber through the first pipe.

Images