JP2022129082A - Magnetic filter unit and filtering device including the same - Google Patents

Abstract

To provide a magnetic filter which enables improvement of iron powder removal rate by a scraper unit.SOLUTION: A magnetic filter unit F1 includes: an external cylinder 11 and an internal cylinder 12; a filtration chamber fr formed in a gap between the external cylinder 11 and the internal cylinder 12; a magnetic rod 10 stored in a cylinder of the internal cylinder 12 so as to protrude and retract; and a scraper unit 20 having a scraping part 20a which slidably contacts with an outer periphery side surface of the internal cylinder 12. The magnetic filter unit F1 has: a magnet moving shaft 15 extending upward from an upper end of the magnetic rod 10; a scraper moving shaft 45 connected to the scraper unit 20; and a moving mechanism 100 including one reciprocating actuator 140. The moving mechanism 100 selectively holds one of the magnet moving shaft 15 and the scraper moving shaft 45 and moves the shaft in a vertical direction to move one of the magnetic rod 10 and the scraper unit 20 in the vertical direction.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a magnetic filter unit and a filtration device equipped with the magnetic filter unit, for example, lubrication and cooling in steel plate rolling process, steel plate press process, machining (cutting) by machine tools, etc. The present invention relates to a magnetic filter unit for separating and purifying substances such as metal powder mixed in the liquid of rolling oil and cooling liquid used as a filter, and a filtering device equipped with the magnetic filter unit.

Conventionally, rolling oil and cooling liquid have been used for the purpose of lubrication and cooling in the steel sheet rolling process of steelworks, the press process for processing steel sheets into desired shapes, and machining (cutting) by machine tools. , Fine metal powder generated during processing such as rolling mixes with rolling oil and cooling liquid and damages the surface of the product and rolling rollers, so it is often used while removing the metal powder. Filtration equipment is often used as a means for removing metal powder, and in addition to filtration using a metal filter or felt filter, a magnetic filter using a permanent magnet or an electromagnet is used when the metal powder is mainly iron. It is

Disposable filters that are replaced with new filters when the amount of captured metal powder reaches the limit are also used for these filters, but in many cases, in consideration of running costs, etc., they are repeatedly used while removing the captured metal powder. .
In the case of a magnetic filter that is repeatedly used while removing captured metal powder, for example, after canceling the attraction force of the magnet acting on the cylindrical filter, a cleaning liquid is run through the filter to wash away the adsorbed iron powder. In some cases, so-called backwashing is used.

In addition to the properties of the rolling oil and cooling liquid, the iron powder that is adsorbed to the magnetic filter depends on conditions such as the size and shape generated during processing. Some are difficult to wash off, and among them, there is iron powder that cannot be washed off only by washing with a cleaning solution.

In addition, some magnetic filters are equipped with a scraper to scrape off the iron powder in order to remove the iron powder that cannot be washed off only by washing with the cleaning liquid, and the scraper scrapes off the iron powder firmly adhering to the filter surface. . For example, in a magnetic filter equipped with a scraper, after canceling the attraction force of the magnet, in addition to the so-called backwashing to wash away the iron powder by running the washing liquid, the iron powder adhering to the surface of the cylindrical filter is scraped off. Some use a scraper together.
A magnetic filter provided with a scraper is disclosed, for example, in Patent Document 1.

The magnetic filter described in Patent Document 1 includes an outer cylinder and an inner cylinder that are concentrically arranged, a filtering chamber formed in a gap between the outer cylinder and the inner cylinder, and a filter that can be inserted into and removed from the inner cylinder. with a housed magnet bar. In this magnetic filter, magnetic substances mixed in the filtrate flowing into the filtration chamber are attracted to the outer peripheral side of the inner cylinder by the magnetic force of the magnetic rods housed in the inner cylinder. A scraper having a scraping portion slidably contacting the outer peripheral side surface of the inner cylinder is installed. A magnetic attraction portion is provided at the upper end of the scraper, and the scraper and the magnetic attraction portion move in the same direction as the magnet rod within the length of the outer cylinder in the central axis direction. It can move and reciprocate in the central axis direction. In the magnetic filter, when the magnet bar is moved in the central axis direction of the outer cylinder, the magnetic attraction portion is attracted by the magnetic force of the magnet bar, and the scraper provided with the magnetic attraction portion moves in the same direction as the magnet bar. Then, the scraping portion slides along the outer peripheral side surface of the inner cylinder to scrape off the magnetic substance adsorbed to the inner cylinder.
Thus, in the magnetic filter of Patent Document 1, when scraping iron powder (metal powder) with the scraper, the scraper is moved along the surface of the cylindrical filter (inner cylinder) in the axial direction of the inner cylinder. , using the attraction force of the magnet (magnet bar) of the magnetic filter.

Japanese Patent No. 6308698

By the way, like the invention described in the above-mentioned Patent Document 1, in the magnetic filter that moves the scraper using the attractive force of the magnet, when the scraper scrapes off the attached iron powder, the iron powder adheres. When the scraper is strong, the scraper cannot be moved by the attractive force of the magnet, and there is a problem that the iron powder cannot be completely removed. If the filtration is restarted before the iron powder is completely removed, the removal rate of the iron powder is lowered and the iron powder capture rate is lowered, thereby lowering the filtration efficiency.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a magnetic filter unit having a scraper unit for scraping off and removing sludge such as iron powder trapped on the surface of the filter, the scraper unit To provide a magnetic filter with improved sludge removal rate by Another object of the present invention is to provide a filtering device equipped with the magnetic filter.

The present invention, which has been made to solve the above problems, comprises an outer cylinder and an inner cylinder concentrically arranged, a filtration chamber formed in a gap between the outer cylinder and the inner cylinder, and a filter inside the inner cylinder. A magnetic filter unit comprising: a magnetic bar that can be put in and taken out; and a scraper unit that has a scraper unit that slidably abuts against the outer peripheral side surface of the inner cylinder. The mixed iron powder is attracted to the outer peripheral surface of the inner cylinder by the magnetic force of the magnet rod contained in the inner cylinder, and the magnet moving shaft extends upward from the upper end of the magnet rod. a scraper moving shaft connected to the scraper unit; and a moving mechanism provided with one reciprocating motion actuator, wherein the moving mechanism is one of the magnet moving shaft and the scraper moving shaft. Either one of the magnet bar and the scraper unit is selectively held and one of the magnet moving shaft and the scraper moving shaft is vertically moved by the reciprocating actuator. is selectively moved in the vertical direction, and when the scraper unit moves in the vertical direction, the sludge adhering to the outer peripheral side surface of the inner cylinder is removed by the scraping portion.

Thus, the magnetic filter unit of the present invention is provided with a "magnet moving shaft" for moving the magnet bar and a "scraper moving shaft" for moving the scraper unit. Further, the magnetic filter unit of the present invention has a moving mechanism having a reciprocating motion actuator, and the moving mechanism selectively holds one of the magnet moving shaft and the scraper moving shaft to reciprocate. Either one of the magnet bar and the scraper unit is selectively moved vertically by vertically moving one of the magnet moving shaft and the scraper moving shaft by the motion actuator. .
That is, in the present invention, the scraper unit is vertically moved by a reciprocating motion actuator, instead of "a configuration in which the scraper is moved by utilizing the attractive force of a magnet" as in the invention described in Patent Document 1 mentioned above. sludge such as iron powder captured on the outer peripheral surface (surface) of the inner cylinder of the magnetic filter unit is Therefore, it is possible to prevent deterioration of filtration efficiency such as reduction of iron powder removal rate and reduction of iron powder capture amount. As a result, when filtering the rolling oil or cooling liquid using the magnetic filter unit, the cleanliness of the rolling oil or cooling liquid can be maintained.

Further, in the present invention, the scraper unit is vertically moved by using the reciprocating actuator, which is a driving source for vertically moving the magnet bar. Therefore, for example, compared to the case where a drive source for moving the scraper unit in the vertical direction is provided separately from the drive source for moving the magnet bar in the vertical direction, the structure is simplified, and energy and space can be saved. becomes.

Further, the moving mechanism has a rotating mechanism and a substantially flat plate-shaped holder rotatably supported by the rotating mechanism. A magnet bar/clamp switching hole for switching between holding and releasing the shaft, and a scraper/clamp switching hole through which the scraper moving shaft is inserted and for switching between holding and releasing the scraper moving shaft are provided. The moving mechanism switches between holding and releasing the magnet moving shaft by the magnet bar/clamp switching hole and moves the scraper by the scraper/clamp switching hole by rotating the holder by the rotating mechanism. It is desirable to switch between release and holding of the moving shaft.

As described above, in the moving mechanism of the present invention, the rotating mechanism rotates the substantially flat plate-shaped holder for selectively holding one of the magnet moving shaft and the scraper moving shaft, whereby the magnet bar/clamp is moved. Switching between holding and releasing the magnet moving shaft by the switching hole and switching between holding release and holding of the scraper moving shaft by the scraper/clamp switching hole are performed. That is, the moving mechanism of the present invention is configured to selectively hold one of the magnet moving shaft and the scraper moving shaft by a space-saving structure in which a flat plate-shaped holder is rotated. A switching structure is provided for selectively holding one of the magnet moving shaft and the scraper moving shaft without increasing the size of the device.

Further, the moving mechanism includes a vertically moving unit having a plate-shaped first holder that selectively holds one of the magnet moving shaft and the scraper moving shaft, and a vertical moving unit above the vertical moving unit. and an upper holding unit provided with a plate-like second holder supported by the base, and the reciprocating actuator supports the lower end of the vertical movement unit and moves up and down. The unit is adapted to reciprocate vertically, and when the first holder selects and holds the scraper-moving shaft, the second holder moves the scraper-moving shaft. The magnet moving shaft is held in a released state, and when the first holder holds the magnet moving shaft, the scraper moving shaft is held in a released state of the magnet moving shaft. Further, when the second holder holds the magnet moving shaft, the magnet bar is arranged at a height position above the filtration chamber, and the scraper It is desirable that the scraper unit is arranged at a height above the filtering chamber when the filter moving shaft is held.

According to this configuration, of the magnet moving shaft and the scraper moving shaft, the shaft that is desired to be moved in the vertical direction is held by the first holder of the vertical movement unit, and the shaft that is not desired to be moved is placed at the upper portion. It can be held by the second holder of the holding unit and arranged at a height position above the filtration chamber.
For example, during the filtration process, the scraper moving shaft is held by the second holder of the upper holding unit so that the scraper unit is arranged at a height above the filtration chamber, and the first holding member of the vertically moving unit is held. With the magnet bar held by the holding portion, the magnet bar can be arranged at the height of the filter chamber in the inner cylinder/cylinder. As a result, the iron powder mixed in the filtrate flowing into the filtration chamber is attracted to the outer peripheral side surface of the inner cylinder by the magnetic force of the magnet bar housed in the inner cylinder, and the filtrate is filtered.
On the other hand, when the sludge adhering to the outer peripheral side surface of the inner cylinder is to be removed after the above filtration process, first, the reciprocating actuator is driven to raise the vertical movement unit holding the magnet movement shaft. direction, the magnet bar is arranged at a height position above the filter chamber, and the magnet bar is taken out from the position of the filter chamber. Next, the first holding portion of the vertical movement unit is switched to "a state in which the holding of the magnet moving shaft is released and the scraper moving shaft is held", and the second holding portion of the upper holding unit is switched to the "scraper moving shaft". The moving shaft is released and the magnet moving shaft is held”. After that, when the vertical movement unit holding the scraper moving shaft is moved downward, the scraping portion of the scraper unit descends while rubbing against the outer peripheral side surface of the inner cylinder. Sludge adhering to is removed.

The vertical movement unit has a rotation mechanism that rotatably supports the first holder, and the first holder is inserted with the shaft for moving the magnet and holds and holds the shaft for moving the magnet. A first magnet bar/clamp switching hole for switching release and a first scraper/clamp switching hole through which the scraper moving shaft is inserted and for switching between holding and releasing the scraper moving shaft are provided, The second retainer is rotatably supported by the base and has a connecting rod connected to the first support plate so as to rotate as the first retainer rotates. Further, the second holder includes a second magnet bar/clamp switching hole for switching between holding and releasing the magnet moving shaft, and a second scraper for switching between holding and releasing the scraper moving shaft. The moving mechanism rotates the first and second holders by the rotating mechanism to move the magnet by the first magnet bar/clamp switching hole of the first holder. Switching between holding and releasing the holding of the shaft, switching between releasing and holding the scraper moving shaft by the first scraper/clamp switching hole, and switching between holding and holding the scraper moving shaft by the second magnet bar/clamp switching hole of the second holder. It is desirable that the magnet moving shaft is switched between holding and holding, and that the scraper moving shaft is switched between holding and holding by the second scraper/clamp switching hole.

Further, the vertical movement unit has a first rotation mechanism that rotatably supports the first holder, and the magnet movement shaft is inserted through the first holder, and the magnet movement shaft is inserted through the first holder. A first magnet bar/clamp switching hole for switching between holding and holding release, and a first clamp/switching hole through which the scraper moving shaft is inserted and for switching between holding and holding release of the scraper moving shaft are provided, The base portion of the upper holding unit is provided with a second rotation mechanism that rotatably supports the second holder. 2. A magnet bar/clamp switching hole and a second scraper/clamp switching hole for switching holding and releasing of the scraper moving shaft are provided, and the moving mechanism is operated by the first rotating mechanism to move the first holder. to switch between holding and non-holding of the magnet moving shaft by the first magnet bar/clamp switching hole of the first holder, and the scraper moving shaft by the first scraper/clamp switching hole. and by rotating the second holder by the second rotating mechanism, the magnet moving shaft is released and held by the second magnet bar/clamp switching hole of the second holder. and to switch holding and releasing of holding of the scraper moving shaft by the second scraper/clamp switching hole.

The present invention also provides a filtering device comprising the above-mentioned magnetic filter unit, comprising: a hollow cylindrical main body having both ends penetrating; a bottom covering the lower end of the main body; and a top surface covering the upper end of the main body. and a partition plate installed below the cylinder of the main body of the housing, the lower end of the magnetic filter unit being installed on the upper surface of the partition plate, and the bottom portion is provided with an opening penetrating through the bottom and a bottom cover capable of opening and closing the opening. By opening the bottom cover and opening the opening, the scraper unit is removed. sludge is discharged from the opening.
The present invention also provides a filtering device comprising the above-mentioned magnetic filter unit, comprising: a hollow cylindrical main body having both ends penetrating; a bottom covering the lower end of the main body; and a top surface covering the upper end of the main body. and a partition plate installed below the cylinder of the main body of the housing, the lower end of the magnetic filter unit being installed on the upper surface of the partition plate, and the bottom portion is detachably attached to the main body, and when the bottom is removed from the main body, the sludge removed by the scraper unit is discharged from an opening at the lower end of the main body. It is characterized by
According to this configuration, for example, when investigating and analyzing the components of the sludge removed by the scraper unit, or when the sludge itself contains substances that need to be recovered, the sludge can be easily removed. can be recovered.

According to the present invention, there is provided a magnetic filter unit having a scraper unit for scraping off and removing sludge such as iron powder trapped on the surface of the filter, and improving the sludge removal rate of the scraper unit. can provide. Moreover, according to this invention, the filtering apparatus provided with the said magnetic filter can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic diagram which showed the structure of the filtration apparatus provided with the magnetic filter unit of 1st Embodiment of this invention. FIG. 4 is an enlarged schematic diagram showing portions of an outer cylinder, an inner cylinder, a magnet bar, and a scraper unit of the magnetic filter unit according to the first embodiment of the present invention, showing the positions of the magnet bar and the scraper unit when filtering is performed. It is a schematic diagram shown. FIG. 4 is an enlarged schematic diagram showing portions of the outer cylinder, the inner cylinder, the magnet rods, and the scraper unit of the magnetic filter unit according to the first embodiment of the present invention, showing the magnet rods and the scraper unit after the sludge removal process. It is a schematic diagram showing a position. FIG. 4A is a schematic diagram for explaining the configuration of the scraper unit of the magnetic filter unit according to the first embodiment of the present invention, and FIG. FIG. 4B is a schematic diagram for explaining the positional relationship between the scraper unit and the scraper moving shaft. FIG. 4 is a schematic plan view of the state of an upper holder and a lower holder when the filtration device equipped with the magnetic filter unit according to the first embodiment of the present invention is performing filtration, where (a) is the upper holder; , and (b) is a schematic diagram showing a lower holder. It is the schematic cross-sectional view of the state which the filtration apparatus provided with the magnetic filter unit of 1st Embodiment of this invention is performing the filtration process. It is the schematic cross-sectional view of the state which the filtration apparatus provided with the magnetic filter unit of 1st Embodiment of this invention is pulling up the magnet bar. FIG. 4 is a schematic plan view of the state of the upper holder and the lower holder when the filtration device equipped with the magnetic filter unit of the first embodiment of the present invention is pulling up the magnet bar, where (a) is the upper holder; , and (b) is a schematic diagram showing a lower holder. It is the schematic cross-sectional view of the state which the filtration apparatus provided with the magnetic filter unit of 1st Embodiment of this invention is switching the clamp. FIG. 4 is a schematic plan view showing the state of the upper holder and the lower holder when the filtration device equipped with the magnetic filter unit according to the first embodiment of the present invention switches between clamps, and (a) shows the upper holder. It is a schematic diagram and (b) is a schematic diagram which shows a lower holder. FIG. 3 is a schematic cross-sectional view showing a state in which the filtering device including the magnetic filter unit according to the first embodiment of the present invention performs sludge removal processing and pushes down the scraper unit. FIG. 4 is a schematic plan view of the states of the upper holder and the lower holder when the scraper unit is pushed down by the filtering device equipped with the magnetic filter unit according to the first embodiment of the present invention, where (a) is the upper holder; , and (b) is a schematic diagram showing a lower holder. It is the schematic cross-sectional view of the state which the filtration apparatus provided with the magnetic filter unit of 2nd Embodiment of this invention is performing the filtration process. FIG. 10A is a schematic plan view of the state of an upper holder and a lower holder when a filtration device equipped with a magnetic filter unit according to a second embodiment of the present invention is performing a filtration process, where (a) is the upper holder; , and (b) is a schematic diagram showing a lower holder. It is the schematic cross-sectional view of the state which the filtration apparatus provided with the magnetic filter unit of 2nd Embodiment of this invention is pulling up the magnet bar. FIG. 10 is a schematic plan view showing the states of the upper holder and the lower holder when the filtration device equipped with the magnetic filter unit of the second embodiment of the present invention switches clamps, and (a) shows the upper holder. It is a schematic diagram and (b) is a schematic diagram which shows a lower holder. FIG. 10 is a schematic cross-sectional view showing a state in which the filtering device including the magnetic filter unit according to the second embodiment of the present invention performs sludge removal processing and pushes down the scraper unit. It is a schematic diagram showing a modification of the housing of the first embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION A magnetic filter unit according to embodiments (first and second embodiments) of the present invention and a filter device including the magnetic filter unit will be described below with reference to the drawings.
First, the configuration of a magnetic filter unit according to a first embodiment of the present invention and a filtering device provided with the magnetic filter unit will be described with reference to FIGS. 1 to 5. FIG.

Here, FIG. 1 is a schematic diagram showing the configuration of the filtering device provided with the magnetic filter unit of the first embodiment. FIG. 2 is a schematic diagram showing an enlarged portion of the outer cylinder, the inner cylinder, the magnet bar, and the scraper unit of the magnetic filter unit of the first embodiment, and the position of the magnet bar and the scraper unit when performing the filtration process. It is a schematic diagram showing. FIG. 3 is a schematic diagram showing an enlarged portion of the outer cylinder, the inner cylinder, the magnet bar and the scraper unit of the magnetic filter unit of the first embodiment, showing the magnet bar and the scraper unit after the sludge removal process. It is a schematic diagram showing the position of. 4A and 4B are schematic diagrams for explaining the configuration of the scraper unit of the magnetic filter unit of the first embodiment, and FIG. FIG. 4B is a schematic diagram for explaining the positional relationship between the scraper unit and the scraper moving shaft. Moreover, FIG. 5 is a schematic plan view of the state of the upper holder and the lower holder when the filtration device equipped with the magnetic filter unit of the first embodiment is performing filtration processing. It is a schematic diagram which shows an upper holder, and (b) is a schematic diagram which shows a lower holder.

<<Overview of Filtration Device W1>>
First, a schematic configuration of the filtering device W1 will be described.
As shown in FIG. 1, the filtering device W1 of the first embodiment includes a hollow cylindrical housing 1, a partition plate 8 installed below the cylinder of the housing 1, and a lower end portion of the partition plate 8. and a magnetic filter unit (hereinafter simply referred to as a magnetic filter) F1 installed in the .

As shown in FIGS. 1 to 3, the magnetic filter F1 includes an outer cylinder 11 and an inner cylinder 12 arranged concentrically, and a filtration chamber fr (see FIG. 2) formed in a gap between the outer cylinder 11 and the inner cylinder 12. ), a magnet rod 10 stored in the cylinder of the inner cylinder 12 so that it can be pulled in and out, a magnet moving shaft 15 extending upward from the upper end of the magnet rod 10, and sliding on the outer peripheral side surface of the inner cylinder 12. and a scraper unit 20 having a freely abutting scraping portion 20a. During the filtration process, iron powder mixed in the filtrate flowing into the filtration chamber fr is attracted to the outer peripheral side surface of the inner cylinder 12 by the magnetic force of the magnet rods 10 housed in the inner cylinder 12.

The magnetic filter F1 includes a scraper moving shaft 45 (see FIG. 1) for moving the scraper unit 20, a connecting plate 48 (see FIG. 4) connecting the scraper unit 20 and the scraper moving shaft 45, and a magnet. a moving mechanism 100 that selectively holds one of the moving shaft 15 and the scraper moving shaft 45 and vertically moves either one of the magnet bar 10 and the scraper unit 20; I have. The magnetic filter F1 also has a control device (not shown) for controlling the operation of the moving mechanism 100 and a power supply section (not shown) for supplying power to the moving mechanism 100 .

In the magnetic filter F1 described above, the "outer cylinder 11 and inner cylinder 12, and most of the magnet rod 10", which constitutes a filter function for capturing magnetic substances such as iron powder, are housed inside the housing 1. there is
1 and 2, the magnet rod 10 is housed in the cylinder of the inner cylinder 12, and the scraper unit 20 is held at a position above the outer cylinder 11 (a position above the filtration chamber fr). This indicates that the 3, the magnet bar 10 of the inner cylinder 12 is raised to a position above the outer cylinder 11 (a position above the filter chamber fr), and the scraper unit 20 is pushed downward. state.

The housing 1 has a hollow cylindrical body portion 1a with both ends penetrating through, a bottom portion 1b that closes the opening at the lower end of the body portion 1a, and a top portion (lid portion) 1c that closes the opening at the upper end of the body portion 1a. ing. Further, the main body portion 1a is formed with a filtrate inlet 3 for allowing a fluid (fluid to be filtered) to flow into the side surface portion on the lower end side thereof. In addition, the body portion 1a is provided with a filtrate outlet 5 for discharging the filtered fluid on a side surface portion on the upper end side thereof. The inside of the housing 1 is partitioned into an area on the side of the filtrate inlet 3 and an area on the side of the filtrate outlet 5 by a partition plate 8 installed in the lower part of the cylinder.

A through hole 1c1 is formed in the center of the lid portion 1c that constitutes the housing 1. The through hole 1c1 accommodates and supports a reciprocating motion actuator 140 that constitutes a movement mechanism 100, which will be described later. The upper end of a bottomed hollow cylindrical waterproof case 7 is fitted and fixed.

Further, the lid portion 1c is formed with four through holes 1c2 at positions around the through hole 1c1 at predetermined intervals. (outer peripheral surface) is fitted and fixed. Further, the through hole 1c2 allows the magnet bar 10 and the magnet moving shaft 15 attached to the upper end of the magnet bar 10 to pass through. The magnet bar 10 and the magnet moving shaft 15 can freely reciprocate between the inside and outside of the housing 1 through the through hole 1c2.
Further, the lid portion 1c is formed with a through hole 1c3 (four through holes 1c3 are formed) at a position around the through hole 1c1 and adjacent to the through hole 1c2. A scraper moving shaft 45 for moving the scraper unit 20 is inserted. The scraper moving shaft 45 can freely reciprocate between the inside and outside of the housing 1 through the through hole 1c3.

The partition plate 8 is formed in a substantially disc shape, and is provided with through holes 8a penetrating through the front and rear surfaces (upper and lower surfaces). The lower end portion (outer peripheral surface) of the outer cylinder 11 is airtightly fitted and fixed. In this embodiment, four through holes 8a (see FIG. 1) are formed in the partition plate 8 at predetermined intervals, and the lower ends of the outer cylinders 11 are airtightly fitted in the respective through holes 8a.・It is fixed.

Further, the bottom portion 1b is provided with an opening (not shown) passing through the bottom portion 1b and a bottom lid portion (not shown) capable of opening and closing the opening portion. By opening the opening, the sludge removed by the scraper unit 20 is preferably discharged through the opening.
With this configuration, for example, when investigating and analyzing the components of the sludge removed by the scraper unit 20, or when the sludge itself contains substances that need to be recovered, the sludge can be easily recovered.

<<Each configuration of the magnetic filter F1>>
Next, each component of the magnetic filter F1 will be described in order.

<<Outer cylinder 11>>
The outer cylinder 11 is formed in a hollow cylindrical shape with both ends penetrating. The length of the outer cylinder 11 in the vertical direction (axial direction) is about half the length of the housing 1 in the vertical direction (axial direction).
With this configuration, the fluid in the area on the filtrate inlet 3 side below the partition plate 8 passes through the through hole 8a of the partition plate 8 and does not pass through the inside of the outer cylinder 11, and is partitioned by the partition plate 8. It becomes impossible to move to the area where the filtrate outlet 5 on the upper side is located. In addition, the fluid in the area on the side of the filtrate inlet 3 above the partition plate 8 passes through the inside of the outer cylinder 11 and does not pass through the through hole 8a of the partition plate 8. It becomes impossible to move to the area on the side of the filtrate inlet 3 on the side.

<<Inner cylinder 12>>
The inner cylinder 12 is formed in a hollow cylindrical shape with an open upper end and a closed lower end. It is In addition, the inner cylinder 12 has a length dimension in the vertical direction (axial direction) larger than the length dimension in the vertical direction (axial direction) of the outer cylinder 11 and has a length dimension in the vertical direction (axial direction) of the housing 1 . It has a length dimension shorter than the dimension (for example, a length dimension of about "4/5" of the housing 1). In addition, the inner cylinder 12 has a radial length dimension (diameter) smaller than that of the outer cylinder 11 , and a portion on the lower end side of the inner cylinder 12 is the cylinder of the outer cylinder 11 . housed inside. The lower end of the inner cylinder 12 is arranged above the lower end of the outer cylinder 11 by a predetermined distance. In addition, the inner cylinder 12 and the outer cylinder 11 are arranged concentrically so that their central axes are aligned.
In the first embodiment, the gap formed between the inner peripheral surface of the outer cylinder 11 and the outer peripheral surface of the inner cylinder 12 is the "filter chamber fr".

《Magnetic Bar 10》
The magnet bar 10 is formed in a substantially cylindrical shape, and a rod-shaped magnet moving shaft 15 having a diameter smaller than that of the magnet bar extends upward from the upper end portion thereof. In addition, the magnet bar 10 is formed such that the length dimension in the vertical direction (axial direction) is smaller than the length dimension in the vertical direction (axial direction) of the inner cylinder 12, and the length dimension in the radial direction ( diameter) is smaller than the radial length dimension (diameter) of the inner cylinder 12 .
In addition, the magnet bar 10 is housed inside the inner cylinder 12 so as to be able to be pulled in and out. 12)”, or in the “height position out of the filtration chamber fr (region above the upper end of the outer cylinder 11)” shown in FIG.

Further, the magnet moving shaft 15 is provided with an engaging portion 15a at an upper position for fixing to an "upper holder 154 of the moving mechanism 100", which will be described later. In addition, the magnet moving shaft 15 is provided with a locking portion 15b for fixing to the "lower holder 134 of the moving mechanism 100" at a position lower than the locking portion 15a by a predetermined distance.

The engaging portion 15a is formed by a pair of flanges (ring-shaped flanges in a plan view) protruding radially outwardly of the magnet moving shaft 15 at a predetermined interval. The pair of flanges are arranged such that an upper flange and a lower flange face each other with a predetermined gap therebetween. Also, the predetermined interval is slightly larger than the thickness dimension of the upper holder 154 (lower holder 134).
The locking portion 15b has the same structure as the locking portion 15a, and is a pair of flanges (ring-shaped flanges in a plan view) projecting radially outwardly of the magnet moving shaft 15 with a predetermined interval. ).

In addition, the predetermined dimension between the engaging portion 15a and the engaging portion 15b is the highest position set in the filtering device W1 when the moving mechanism 100 raises the vertically moving unit 130 (described later). 7), the distance dimension in the vertical direction (axial direction) between the upper holder 154 and the lower holder 134 is achieved.
In the illustrated example, the locking portions 15a and 15b are inserted into the magnet moving shaft 15 with a pair of nuts separated by the thickness dimension of the upper holder 154 (lower holder 134). A pair of flanges are formed by being fixed, but the present invention is not particularly limited to this.

<<Scraper unit 20>>
The scraper unit 20 includes a ring-shaped scraping portion 20a having a through hole in the center, and bar-shaped scraper holding shafts 20b extending upward from the upper end of the scraping portion 20a. there is

The scraping portion 20a has a length dimension (diameter) in the radial direction of the inner peripheral portion so that the inner peripheral portion can slidably contact the outer peripheral side surface of the inner cylinder 12 and move in the vertical direction. Designed. The radial dimension (diameter) of the outer peripheral portion of the scraper unit 20 is designed so that the scraper unit 20 can be inserted into the outer cylinder 11 and reciprocated vertically (axially).
As shown in FIG. 4, the scraper holding shafts 20b, 20b are fixed at their upper ends to a connecting plate 48 fixed to the lower end of the scraper moving shaft 45. As shown in FIG. Accordingly, when the scraper moving shaft 45 moves vertically, the scraper unit 20 moves vertically together with the scraper moving shaft 45 . The connecting plate 48 is formed with through-holes through which the inner cylinder 11 and the magnet rods 10 are inserted.

<<Scraper moving shaft 45>>
The scraper moving shaft 45 is formed in a substantially bar shape with the same diameter as the magnet moving shaft 15 described above. Further, as shown in FIG. 4(a), the scraper moving shaft 45 is provided at its upper position with a locking portion 45a for fixing to an "upper holder 154 of the moving mechanism 100", which will be described later. ing. Further, the scraper moving shaft 45 is provided with a locking portion 45b for fixing to the "lower holder 134 of the moving mechanism 100" at a position lower than the locking portion 45a by a predetermined distance.

The locking portions 45a and 45b have the same configuration as the locking portions 15a and 15b, and are a pair of flanges (plan view ring-shaped flange). Further, the flanges of the locking portions (locking portions 45a and 45b and locking portions 15a and 15b) have the same shape and size.

As described above, the scraper moving shaft 45 has the connection plate 48 that holds the scraper unit 20 fixed to its lower end. It can be moved.

<<Movement Mechanism 100>>
The moving mechanism 100 includes a vertically moving unit 130 having a lower holder (first holder) 134 that selectively holds one of the magnet moving shaft 15 and the scraper moving shaft 45, and the vertically moving unit 130. A reciprocating motion actuator (reciprocating motion mechanism) 140 that supports the lower end and vertically reciprocates the vertical movement unit 130, and an upper portion that selectively holds one of the magnet moving shaft 15 and the scraper moving shaft 45. and an upper holding unit 150 with a holding fixture (second holding fixture) 154 .
Further, the upper holding unit 150 is provided with downwardly extending connecting rods 156 on the lower surface of the upper holding tool (second holding tool) 154 . The lower ends of the connecting rods 156 are fixed to a lower holder (first holder) 134 of the vertical movement unit 130 . The connecting rods 156 , 156 connect the upper holder (second holder) 154 to the lower holder (first holder) 134 .

<<Vertical Movement Unit 130 of Movement Mechanism 100>>
The vertically moving unit 130 includes a body portion 131, a rotation mechanism 133 attached to the upper surface of the body portion 131, and a lower portion housed inside the body portion 131 and rotatably supported by the rotating shaft of the rotation mechanism 133. and a retainer 134 . The rotating mechanism 133 is composed of, for example, a servomotor or the like, and rotates the lower holder 134 clockwise within a predetermined rotation range and rotates the lower holder 134 counterclockwise within a predetermined rotation range. It is designed to let
Since the lower holder 134 is connected to the upper holder 154 by a connecting rod 156, when the lower holder 134 rotates, the upper holder 154 also rotates in the same manner as the lower holder 134. there is

The body portion 131 includes a bottom portion 131a, a top portion 131b facing the bottom portion 131a, and side portions 131c and 131c extending from both side ends of the bottom portion 131a to both sides of the top portion 131b. is formed in a substantially box-like shape.
The magnet moving shaft 15 and the scraper moving shaft 25 are inserted through the bottom surface portion 131a and the upper surface portion 131b. A connecting rod 156 is inserted through the upper surface portion 131b.
Further, the tip portion of the piston rod 144 of the reciprocating motion actuator 140 is connected and fixed to the bottom surface portion 131 a of the main body portion 131 . The body portion 131 moves vertically as the piston rod 144 of the reciprocating actuator 140 expands and contracts.

The lower holder 134 is formed in a substantially disc shape, as shown in FIG. 5(b).
The lower holder 134 also has a first magnet bar/clamp switching hole (hereinafter referred to as " clamp switching hole") 71 and a first scraper/clamp switching hole (hereinafter referred to as "clamp switching hole") 72 for controlling the scraper moving shaft 45 between a held state (clamped state) and a held state (free state). and are provided. In this embodiment, four sets of "clamp switching holes 71 and clamp switching holes 72" are provided.

The clamp switching hole 71 has an elongated hole shape with a diameter slightly larger than the diameter of the magnet moving shaft 15 and smaller than the outer diameter of the flanges of the locking portions 15 a and 15 b of the magnet moving shaft 15 . and a circular large-diameter portion 71b having a diameter larger than the outer diameter of the flanges of the locking portions 15a and 15b of the magnet moving shaft 15 (substantially elongated hole). It is formed in a shape in which a part of a substantially circular shape is overlapped and joined to a part of the shape.

When holding the magnet moving shaft 15, the lower holder 134 is arranged at a position sandwiched between the "pair of flanges" of the engaging portion 15b of the magnet moving shaft 15 in the vertical direction. It's like That is, the lower holder 134 is arranged at a position sandwiched between the upper and lower flanges of the locking portion 15b of the magnet moving shaft 15 (see FIG. 1). .

Then, when the lower holder 134 is rotated in the "first direction (for example, clockwise direction)" by the rotating mechanism 133, and the magnet moving shaft 15 is arranged at the position of the small diameter portion 71a of the clamp switching hole 71, A “pair of flanges” of the engaging portion 15 b of the magnet moving shaft 15 is arranged at the position of the small diameter portion 71 a of the clamp switching hole 71 of the lower holder 134 . As a result, the lower holder 134 is sandwiched between the engaging portions 15b (pair of flanges). That is, the lower holder 134 holds the magnet moving shaft 15 in a vertically fixed state (clamped state).
On the other hand, with the lower holder 134 clamping the magnet moving shaft 15 , when the rotating mechanism 133 rotates the lower holder 134 in the “second direction (for example, counterclockwise direction)”, the magnet moving shaft 15 is rotated. is arranged at the position of the large-diameter portion 71b of the clamp switching hole 71, and the lower holder 134 is released from holding the locking portions 15 (pair of flanges). . As a result, the magnet moving shaft 15 is brought into a state (free state) in which it can move freely in the vertical direction with respect to the lower holder 134 .

The clamp switching hole 72 has an elongated hole shape with a diameter slightly larger than the diameter of the scraper moving shaft 45 and smaller than the outer diameter of the flanges of the locking portions 45 a and 45 b of the scraper moving shaft 45 . and a circular large diameter portion 72b having a diameter larger than the outer diameter of the flanges of the locking portions 45a and 45b of the scraper moving shaft 45 (substantially elongated hole). It is formed in a shape in which a part of a substantially circular shape is overlapped and joined to a part of the shape.

Further, when the scraper moving shaft 45 is held, the lower holder 134 is arranged at a position sandwiched between "a pair of flanges" of the engaging portion 45b of the scraper moving shaft 45 in the vertical direction. It's like That is, the lower holder 134 is arranged at a position sandwiched between the upper and lower flanges of the locking portion 45b of the scraper moving shaft 45 (see FIG. 7). .

Then, when the lower holder 134 is rotated in the "first direction (for example, clockwise direction)" by the rotating mechanism 133, and the scraper moving shaft 45 is arranged at the position of the small diameter portion 72a of the clamp switching hole 72, A “pair of flanges” of the engaging portion 45 b of the scraper moving shaft 45 is arranged at the position of the small diameter portion 72 a of the clamp switching hole 72 of the lower holder 134 . As a result, the lower holder 134 is sandwiched between the engaging portions 45b (pair of flanges). That is, the lower holder 134 holds the scraper moving shaft 45 in a vertically fixed state (clamped state).

On the other hand, when the lower holding tool 134 clamps the scraper moving shaft 45, rotating the lower holding tool 134 in the "second direction (for example, counterclockwise direction)" by the rotating mechanism 133 clamps the scraper moving shaft 45. The locking portion 45b of the moving shaft 45 is now arranged at the position of the large diameter portion 72b of the clamp switching hole 72, and the lower holder 134 is released from clamping the collar portion constituting the locking portion 45b. become a state. As a result, the clamp moving shaft 45 is brought into a state (free state) in which it can move freely in the vertical direction with respect to the lower holder 134 .

When the lower holder 134 holds the magnet moving shaft 15 (or the scraper moving shaft 45) in a fixed state, the scraper moving shaft 45 (or the magnet moving shaft 15) is fixed. When released, the scraper moving shaft 45 (or the magnet moving shaft 15) can be freely moved with respect to the lower holder 134. As shown in FIG. That is, the lower holder 134 is configured to select and hold one of the magnet moving shaft 15 and the scraper moving shaft 45 .

<<Reciprocating Motion Actuator 140 of Moving Mechanism 100>>
As shown in FIG. 1, the reciprocating motion actuator 140 includes a cylinder tube 141, a head cover 142 that seals one end of the cylinder tube 141, a rod cover 143 that seals the other end of the cylinder tube 141, and a cylinder tube. 141 and a piston rod 144 having one end connected to the piston and the other end extending outward from a through hole of the rod cover 143 . It consists of an air cylinder. Also, the tip of the piston rod 144 is fixed to the bottom surface 131 a of the main body 131 of the vertical movement unit 130 .
Further, the reciprocating motion actuator 140 is attached to the waterproof case 7 attached to the lid portion 1c of the housing 1 at the outer peripheral portion on the upper end side of the cylinder tube 141, and most of the cylinder tube 141 is attached to the waterproof case 7. housed inside.
The reciprocating motion actuator 140 is connected to an air supply source (not shown). An air supply is also controlled by a controller (not shown) to supply air to the reciprocating actuator 140 to operate the reciprocating actuator 140 .

With the above configuration, the reciprocating motion actuator 140 causes the piston rod 144 to protrude from the cylinder tube 141 and extend it, thereby pushing up the main body 131 fixed to the tip of the piston rod 144. can be lifted by pressing (see FIG. 7). Further, the reciprocating motion actuator 140 retracts the piston rod 144 into the cylinder-tube 141 in a state in which the piston rod 144 is protruded from the cylinder-tube 141 and is shortened, so that the tip of the piston rod 144 is The fixed main body 131 can be lowered by pushing it downward (see FIG. 1).

In the first embodiment, the reciprocating motion actuator 140 is an air cylinder, but it may be a hydraulic cylinder instead of an air cylinder, or an electric actuator (electric cylinder). can be That is, any device may be used as long as it can move the main body 131 linearly in the vertical direction to reciprocate.

<<Upper Holding Unit 150 of Moving Mechanism 100>>
The upper holding unit 150 includes a flat plate-shaped base 151 fixed to a support C such as a ceiling or a rack in the installation area, a rotation shaft 152 provided on one surface (lower surface) of the base 151, and a rotation shaft 152. 152 and an upper holder (second holder) 154 rotatably supported. Further, the upper holder (second holder) 154 is provided with connecting rods 156 and 156 fixed to the lower holder (first holder) 134 of the vertical movement unit 130 on its lower surface.

As shown in FIG. 5( a ), the upper holder 154 is formed in a substantially disk shape like the lower holder 134 described above, and has a “second magnet bar/clamp switching hole (clamp switching hole). 71" and four sets of "second scraper/clamp switching holes (clamp switching holes) 72" are provided.
The second magnet bar/clamp switching hole 71 has the same configuration as that of the first magnet bar/clamp switching hole 71, and is given the same reference numerals. Further, the second scraper/clamp switching hole 72 has the same configuration as the first scraper/clamp switching hole 72, and is given the same reference numerals.
Further, the position of the clamp switching hole 71 and the clamp switching hole 72 of the upper holder 154 is set at a predetermined angle (for example, 23 degrees) clockwise from the "clamp switching hole 71 and the clamp switching hole 72" of the lower holder 134. ) is placed in a rotated position.

With the above configuration, when the upper holder 154 clamps the magnet moving shaft 15 , the lower holder 134 frees the magnet moving shaft 15 . When the upper holder 154 keeps the magnet moving shaft 15 free, the lower holder 134 clamps the magnet moving shaft 15 .
Further, with the above configuration, when the upper holder 154 clamps the scraper moving shaft 45, the lower holder 134 frees the scraper moving shaft 45. FIG. Further, when the upper holder 154 puts the scraper moving shaft 45 in a free state, the lower holding member 134 puts the scraper moving shaft 45 in a clamped state.

<<Operation of Filtration Device W1>>
Next, the operation of the filtering device W1 of the first embodiment will be described.

≪Filtration process≫
First, the state of the filtration device W1 during the filtration process (the positions of the magnet bar 10 and the scraper unit 20, the positions of the lower holder 134 and the upper holder 154, and the "magnet movement shaft 15 and scraper movement shaft 45") relationship) will be described with reference to FIGS. 5 and 6 described above.
Here, FIG. 6 is a schematic cross-sectional view showing a state in which the filtration device including the magnetic filter unit of the first embodiment is performing filtration processing.

As shown in FIG. 6, when the filtration device W1 performs the filtration process, the magnet rods are placed in the lower region of the inner cylinder 12 housed in the outer cylinder 11 (the region at the height of the filtration chamber fr). 10 is inserted and the scraper unit 20 is held at a position above the outer cylinder 11 .
At this time, the magnet moving shaft 15 for vertically moving the magnet bar 10 is clamped and held by the lower holder 134 and is in a free state in which it can freely move with respect to the upper holder 154 . Further, the scraper moving shaft 45 for moving the scraper unit 20 is clamped and held by the upper holder 154, and the scraper unit 20 is positioned above the outer cylinder 11 (above the filter chamber fr). position).

At this time, the lower holder 134 and the upper holder 154 are arranged as shown in FIGS. 5(a) and 5(b).
Specifically, as shown in FIG. 6, the lower holder 134 is arranged at a position sandwiched between an upper flange portion and a lower flange portion of the locking portion 15b of the magnet moving shaft 15. And, as shown in FIG. 5(b), the magnet moving shaft 15 is arranged at the position of the small diameter portion 71a of the clamp switching hole 71 of the lower holder 134 in plan view. That is, the lower holder 134 is in a state of being held between a pair of flanges of the engaging portion 15b of the magnet moving shaft 15 (a state of clamping and holding the magnet moving shaft 15).
In addition, in plan view, the clamp movement shaft 45 is arranged at the position of the large diameter portion 72b of the clamp switching hole 72 of the lower holder 134 , and the clamp movement shaft 45 is free with respect to the lower holder 134 . It is in a free state in which it can move up and down.

Further, as shown in FIG. 6, the upper holder 154 is arranged at a position sandwiched between the upper and lower flanges of the engaging portion 45a of the scraper moving shaft 45. Further, as shown in FIG. 5(a), the scraper moving shaft 45 is arranged at the position of the small diameter portion 72a of the clamp switching hole 72 of the upper holder 154 in plan view. In other words, the upper holder 154 is sandwiched between the pair of flanges of the engaging portions 45a of the scraper moving shaft 45 (the scraper moving shaft 45 is clamped and held). ing.
Further, as shown in FIG. 5(a), the magnet moving shaft 15 is arranged at the position of the large diameter portion 71b of the clamp switching hole 71 of the upper holder 154 in plan view. is in a free state in which it can move freely with respect to the upper holder 154 . In this state, even if the magnet moving shaft 15 rises, the locking portion 15a of the magnet moving shaft 15 passes through the large diameter portion 71b of the clamp switching hole 71 of the upper holder 154. FIG.

In the filtration process, in the state shown in FIGS. 5 and 6, "filtrate (fluid) mixed with iron powder" is introduced into the housing 1 from the filtrate inlet 3 (see FIG. 1) at the lower end of the housing 1. ” inflow.
The "filtrate (fluid)" that has flowed into the housing 1 from the filtrate inlet 3 passes through the through hole 8a of the partition plate 8 and flows into the "filter chamber fr" from the lower end of the outer cylinder 11. , in the "filter chamber fr", the iron powder present in the filtrate is attracted to the outer peripheral side surface (outer wall surface) of the inner cylinder 12 by the magnetic force of the magnetic bar 10 housed inside the inner cylinder 12, The iron powder mixed in the filtrate is removed. After that, the "filtrate from which the iron powder has been removed" flows from the opening at the upper end of the outer cylinder 11 to the upper side of the housing 1, and further flows out from the "filtrate outlet 5" provided on the upper side of the housing 1. continue. A conical closed portion 13 is formed at the lower end of the inner cylinder 12 so that the filtrate flowing into the "filter chamber" can smoothly flow upward.

≪Pull-up process of magnet bar≫
Next, a process of pulling up the magnet bar 10 in order to remove iron powder (sludge) adhering to the outer peripheral surface (outer wall surface) of the inner cylinder 12 will be described with reference to FIGS. 7 and 8. FIG.
Here, FIG. 7 is a schematic cross-sectional view showing a state in which the filtering device including the magnetic filter unit of the first embodiment pulls up the magnet bar. FIG. 8 is a schematic plan view of the state of the upper holder and the lower holder when the magnetic bar is pulled up by the filtration device equipped with the magnetic filter unit of the first embodiment. It is a schematic diagram which shows a tool|tool, (b) is a schematic diagram which shows a lower holding tool.

After performing the filtration process in the state of FIGS. 5 and 6 described above, when removing the iron powder (sludge) adsorbed to the outer peripheral side surface (outer wall surface) of the inner cylinder 12, first, from the position of the filter chamber, the magnet bar Raise 10.
Specifically, the operator operates the reciprocating motion actuator 140 of the moving mechanism 100 for the filtration device W1 in the state of FIGS. to extend it. As a result, the body portion 131 fixed to the tip portion of the piston rod 144 is pushed upward (raised). At this time, since the lower holder 134 of the main body 131 clamps the magnet moving shaft 15, the filtering device W1 is held by the lower holder 134 and rises as the main body 131 rises. Together with the shaft 15, the magnet bar 10 supported at the lower end of the magnet moving shaft 15 also rises to the state shown in FIGS.

Then, as shown in FIG. 7, since the magnet bar 10 is arranged at the "height position outside the filtration chamber fr (region above the upper end of the outer cylinder 11)", the No effect of magnetic force. In addition, due to this upward movement, the lower holder 134 moves vertically between the upper and lower flanges of the locking portion 45b of the scraper moving shaft 45 held by the upper holder 154. It will be placed in a sandwiched position. Further, by the above-described elevation, the magnet moving shaft 15 is raised to the position of the upper holder 154 at the locking portion 15a.
As shown in FIG. 8, the state of the "lower holder 134 and upper holder 154" when the magnet bar 10 is pulled up is the same as in FIG. 45 is clamped and held, and the lower holder 134 clamps and holds the magnet moving shaft 15 .

《Clamp switching》
Next, a clamp switching process for removing iron powder (sludge) adhering to the outer peripheral side surface (outer wall surface) of the inner cylinder 12 will be described with reference to FIGS. 9 and 10. FIG.
Here, FIG. 9 is a schematic cross-sectional view showing a state in which the filtering device including the magnetic filter unit of the first embodiment is switching between clamps. FIG. 10 is a schematic plan view of the states of the upper holder and the lower holder when the filtration device equipped with the magnetic filter unit of the first embodiment switches clamps, and (a) shows the upper holder. It is a schematic diagram showing, and (b) is a schematic diagram which shows a lower holder.

As shown in FIGS. 7 and 8 described above, after pulling up the magnet bar 10 from the position of the filtration chamber, the operator drives the rotation mechanism 133 of the vertical movement unit 130 of the movement mechanism 100 with respect to the filtration device W1. Then, the lower holder 134 is rotated clockwise by a predetermined angle. In addition, since the lower holder 134 is connected to the upper holder 154 by the connecting rod 156, when the lower holder 134 rotates, the upper holder 154 rotates clockwise by a predetermined angle as well as the lower holder 134. Rotate. As a result, the filtering device W1 enters the state shown in FIGS. 9 and 10. FIG.

9 is the same as in FIG. 7, but the lower holder 134 and the upper holder 154 are rotated by the rotation mechanism 133. Therefore, the position in plan view transitions to the state shown in FIG. 10, and the clamping of the lower holder 134 and the upper holder 154 is switched. In FIG. 10, the upper holder 154 clamps and holds the magnet moving shaft 15, and the scraper moving shaft 45 is unclamped and placed in a free state. In addition, the lower holder 134 unclamps the magnet moving shaft 15 and puts it in a free state, and clamps and holds the scraper moving shaft 45 .
Accordingly, when the moving mechanism 100 is driven to operate the vertically moving unit 130, only the scraper unit 20 can be moved while maintaining the magnet bar 10 at the upper position.

Specifically, as shown in FIG. 10(a), the magnet moving shaft 15 is arranged at the position of the small diameter portion 71a of the clamp switching hole 71 of the upper holder 154 in plan view, and the upper holder 154 It is held between a pair of flanges of the engaging portion 15a of the magnet moving shaft 15 (see FIG. 9). That is, the upper holder 154 clamps and holds the magnet moving shaft 15 . Further, in plan view, the clamp movement shaft 45 is arranged at the position of the large diameter portion 72b of the clamp switching hole 72 of the upper holder 154, and the clamp movement shaft 45 is free in the vertical direction with respect to the upper holder 154. can be moved to

Further, as shown in FIG. 10(b), in plan view, the scraper moving shaft 45 is arranged at the position of the small diameter portion 72a of the clamp switching hole 72 of the lower holder 134, and the lower holder 134 is scraped. - It is sandwiched between a pair of flanges of the engagement portion 45b of the pa-moving shaft 45 (see FIG. 9). That is, the lower holder 134 clamps and holds the scraper moving shaft 45 . Further, in a plan view, the magnet moving shaft 15 is arranged at the position of the large diameter portion 71b of the clamp switching hole 71 of the lower holder 134, and the magnet moving shaft 15 is free to move vertically with respect to the lower holder 134. can be moved to

《Push down the scraper》
Next, a scraper pressing step for removing iron powder (sludge) adhering to the outer peripheral side surface (outer wall surface) of the inner cylinder 12 will be described with reference to FIGS. 11 and 12. FIG.
Here, FIG. 11 is a schematic cross-sectional view showing a state in which the filtering device equipped with the magnetic filter unit of the first embodiment performs sludge removal processing and pushes down the scraper unit. FIG. 12 is a schematic plan view of the state of the upper holding fixture and the lower holding fixture when the scraper unit is pushed down by the filtration device equipped with the magnetic filter unit of the first embodiment, and (a) is the upper holding fixture. It is a schematic diagram which shows a tool|tool, (b) is a schematic diagram which shows a lower holding tool.

After switching the clamps as shown in FIGS. 9 and 10 described above, the operator operates the reciprocating motion actuator 140 of the moving mechanism 100 for the filtering device W1 to shorten the piston rod 144. to pull the piston rod 144 into the cylinder-tube 141. As a result, the body portion 131 fixed to the tip portion of the piston rod 144 is pushed downward (lowered). At this time, since the lower holder 134 of the main body 131 clamps the sludge moving shaft 45, the filter W1 is held by the lower holder 134 and descends as the main body 131 descends. Along with the shaft 45, the scraper unit 20 connected to the sludge moving shaft 45 via the connecting plate 48 descends to the state shown in FIGS. 11 and 12. FIG.

9 to 11, the scraping portion 20a of the sludge 20 descends while sliding on the outer peripheral side surface of the inner cylinder 12. Sludge adhering to the outer peripheral side surface of is scraped off and peeled off.
As shown in FIG. 12, the state of the "lower holder 134 and upper holder 154" when the scraper unit 20 is pulled down is the same as in FIG. is clamped and held, and the lower holder 134 clamps and holds the scraper moving shaft 45 .

11 and 12, when returning to the filtering step, first, the operator operates the reciprocating motion actuator 140 of the moving mechanism 100 for the filtering device W1, and the cylinder-tube 141 By extending the piston rod 144, the scraper unit 20 is pulled up and returned to the state shown in FIG.
Next, the operator operates the rotating mechanism 133 of the vertically moving unit 130 of the moving mechanism 100 for the filtering device W1 to rotate the "lower holder 134 and upper holder 154" counterclockwise. By rotating it by a predetermined angle, the “lower holder 134 and upper holder 154” are shifted to the state shown in FIG. 8 to switch between clamps. As a result, the upper holder 154 clamps and holds the scraper moving shaft 45 , and the lower holder 134 clamps and holds the magnet moving shaft 15 .

Thereafter, the operator operates the reciprocating motion actuator 140 of the moving mechanism 100 to pull the piston rod 144 into the cylinder-tube 141 and shorten it. As a result, the body portion 131 fixed to the tip portion of the piston rod 144 is pushed downward (lowered). At this time, since the lower holder 134 of the main body 131 clamps the magnet moving shaft 15, the filtering device W1 is held by the lower holder 134 and descends as the main body 131 descends. The magnet bar 10 descends together with the shaft 45, and the filtration process shown in FIGS. 5 and 6 is performed.

As described above, the magnetic filter W1 of the first embodiment of the present invention includes the magnet moving shaft 15 for vertically moving the magnet bar 10 and the scraper for vertically moving the scraper unit 20. A moving shaft 45 is provided.
Moreover, the magnetic filter F1 of the first embodiment has a moving mechanism 100 having one reciprocating motion actuator 140 . The moving mechanism 100 selectively holds one of the magnet moving shaft 15 and the scraper moving shaft 45, and vertically moves one of the magnet moving shaft 15 and the scraper moving shaft 45 by a reciprocating actuator. , one of the magnet bar 10 and the scraper unit 20 is selectively moved vertically.

That is, in the first embodiment, the scraper unit 20 is moved by the reciprocating motion actuator 140 instead of the "configuration in which the scraper is moved using the attractive force of the magnet" as in the invention described in Patent Document 1 described above. Since it is configured to move in the vertical direction, iron trapped on the outer peripheral surface (surface) of the inner cylinder 12 of the magnetic filter F1 is removed compared to "a configuration in which the scraper is moved using the attractive force of the magnet". The powder can be reliably removed, and a decrease in filtration efficiency, such as a decrease in the iron powder removal rate and a decrease in the amount of iron powder captured, can be prevented. As a result, when filtering the rolling oil or cooling liquid using the magnetic filter F1, the cleanliness of the rolling oil or cooling liquid can be maintained.

Further, in the first embodiment, the scraper unit 20 is vertically moved by using the reciprocating motion actuator 140, which is a driving source for vertically moving the magnet bar 10. FIG. Therefore, for example, compared to the case where a driving source for moving the scraper unit 20 in the vertical direction is provided separately from the driving source for moving the magnet bar 10 in the vertical direction, the structure is simplified, energy saving, and space saving are achieved. becomes possible.

In the moving mechanism 100 of the first embodiment, the rotating mechanism 133 selectively holds one of the magnet-moving shaft 15 and the scraper-moving shaft 45 . By rotating the upper holder 154), the holding and holding release of the magnet moving shaft 15 by the clamp switching hole 71 are switched, and the holding release and holding of the scraper moving shaft 45 by the clamp switching hole 72 are switched. ing. That is, the moving mechanism 100 of the first embodiment rotates the flat plate-like holders (lower holder 134, upper holder 154), which saves space. 45 can be selectively held, and a switching structure for selectively holding one of the magnet moving shaft 15 and the scraper moving shaft 45 is provided without increasing the size of the device. .

<<Second embodiment>>
Next, the configuration of the magnetic filter unit F2 of the second embodiment of the present invention and the filter device W2 including the magnetic filter unit F2 will be described with reference to FIGS. 13 to 17. FIG.
The same reference numerals are given to the same (or corresponding) configurations as those of the above-described first embodiment, and the description thereof will be omitted or simplified. Also, only the parts of the second embodiment that differ from the first embodiment will be described in detail.

First, referring to FIG. 13, the configuration of a filtering device W2 including the magnetic filter unit F2 of the second embodiment will be described.
Here, FIG. 13 is a schematic cross-sectional view showing a state in which the filtration device having the magnetic filter of the second embodiment is performing filtration.

As shown in the figure, the filtration device W2 of the second embodiment includes a housing 1, a partition plate 8 installed below the cylinder of the housing 1, and a magnetic and a filter unit (hereinafter simply "magnetic filter") F2.

The magnetic filter F2 of the second embodiment is not provided with the connecting rod 156 that connects the lower holder 134 and the upper holder 154, and rotates also on the upper holder 154 side separately from the rotation mechanism that rotates the lower holder 134. It is configured with a mechanism.

Specifically, the magnetic filter F2 of the second embodiment includes an outer cylinder 11 and an inner cylinder 12, a filtration chamber fr formed in a gap between the outer cylinder 11 and the inner cylinder 12, and a filter inside the inner cylinder 12. It has a magnet rod 10 that can be put in and taken out, a magnet moving shaft 15 that extends upward from the upper end of the magnet rod 10, and a scraping portion 20a that slidably contacts the outer peripheral side surface of the inner cylinder 12. scraper unit 20, scraper moving shaft 45 for moving scraper unit 20, connecting plate 48 connecting scraper unit 20 and scraper moving shaft 45, magnet moving shaft 15 and scraper moving shaft 45 and a moving mechanism 200 which selectively holds one of them and vertically moves either one of the magnet bar 10 and the scraper unit 20 to move vertically. Further, the magnetic filter F2 has a control device (not shown) for controlling the operation of the moving mechanism 200 and a power supply section (not shown) for supplying power to the moving mechanism 200 .

Further, the moving mechanism 200 of the second embodiment includes a vertically moving unit 130 having a lower holder (first holder) 134 that selectively holds one of the magnet moving shaft 15 and the scraper moving shaft 45. , a reciprocating motion actuator 140 that supports the lower end of the vertically moving unit 130 and reciprocates the vertically moving unit 130 in the vertical direction, and selectively holds one of the magnet moving shaft 15 and the scraper moving shaft 45. and an upper holding unit 250 having an upper holding fixture (second holding fixture) 154 that
Note that the vertically moving unit 130 and the reciprocating motion actuator 140 have the same configurations as those of the first embodiment, and thus description thereof is omitted.

The upper holding unit 250 also includes a base 151 , a rotation mechanism 233 having a rotating shaft 233 a installed on the other surface (upper surface) of the base 151 , and an upper holder (second holder) 154 . In the rotating mechanism 233, a rotating shaft 233a protrudes from one surface (the other surface) of the base portion 151, and an upper holder (second holder) 154 is rotatably supported on the rotating shaft 233a.

<<Operation of Filtration Device W2>>
Next, operation|movement of the filter W2 of 2nd Embodiment is demonstrated easily.

≪Filtration process≫
First, the filtration device W2 during the filtration process will be described with reference to FIGS. 13 and 14 described above.
Here, FIG. 14 is a schematic plan view of the state of the upper holder and the lower holder when the filtration device equipped with the magnetic filter unit of the second embodiment is performing filtration processing. is a schematic diagram showing an upper holder, and (b) is a schematic diagram showing a lower holder.

As shown in FIG. 13 , in the filtration device W2 of the second embodiment, as in the first embodiment, when performing filtration, the filter is placed in the region below the inner cylinder 12 accommodated in the outer cylinder 11 . A state is set in which the magnet bar 10 is inserted and the scraper unit 20 is held at a position above the outer cylinder 11 (a position above the filtration chamber fr).
Also in the second embodiment, as in the first embodiment, the magnet moving shaft 15 is clamped to the lower holder 134 and is freely movable with respect to the upper holder 154 when the filtering process is performed. state. Further, the scraper moving shaft 45 is clamped and held by the upper holder 154, and the scraper unit 20 is maintained at a position above the outer cylinder 11 (a position above the filter chamber fr).

At this time, the lower holder 134 and the upper holder 154 are arranged as shown in FIGS. 14(a) and 14(b).
Specifically, as shown in FIG. 14B, the magnet moving shaft 15 is arranged at the position of the small diameter portion 71a of the clamp switching hole 71 of the lower holder 134 in plan view. That is, the lower holder 134 is sandwiched between the pair of flanges of the engaging portion 15b of the magnet moving shaft 15, and clamps and holds the magnet moving shaft 15. As shown in FIG.
In addition, in plan view, the clamp movement shaft 45 is arranged at the position of the large diameter portion 72b of the clamp switching hole 72 of the lower holder 134 , and the clamp movement shaft 45 is free with respect to the lower holder 134 . It is in a free state in which it can move up and down.

Further, as shown in FIG. 14A, the scraper moving shaft 45 is arranged at the position of the small diameter portion 72a of the clamp switching hole 72 of the upper holder 154 in plan view. In other words, the upper holder 154 is sandwiched between the pair of flanges of the engaging portions 45a of the scraper moving shaft 45, and clamps and holds the scraper moving shaft 45. It's becoming
Further, in plan view, the magnet moving shaft 15 is arranged at the position of the large diameter portion 71b of the clamp switching hole 71 of the upper holder 154 , and the magnet moving shaft 15 is free with respect to the upper holder 154 . It is in a free state in which it can move up and down. In this state, even if the magnet moving shaft 15 rises, the locking portion 15a of the magnet moving shaft 15 passes through the large diameter portion 71b of the clamp switching hole 71 of the upper holder 154. FIG.

≪Pull-up process of magnet bar≫
Next, the process of pulling up the magnet bar 10 will be described with reference to FIG. 15 .
Here, FIG. 15 is a schematic cross-sectional view showing a state in which the magnetic bar is pulled up by the filtering device provided with the magnetic filter of the second embodiment.

Specifically, the operator operates the reciprocating motion actuator 140 of the moving mechanism 200 for the filtering device W2 in the state of FIGS. to extend it. As a result, the body portion 131 fixed to the tip portion of the piston rod 144 is pushed upward (raised). At this time, since the lower holder 134 of the main body 131 clamps the magnet moving shaft 15, the filtering device W2 is held by the lower holder 134 and rises as the main body 131 rises. Together with the shaft 15, the magnet bar 10 supported at the lower end of the magnet moving shaft 15 also rises to the state shown in FIG.

The state of the "lower holder 134 and upper holder 154" remains as shown in FIG. The lower holder 134 clamps and holds the magnet moving shaft 15 .

《Clamp switching》
Next, the clamp switching process will be described with reference to FIGS. 15 and 16 described above.
Here, FIG. 16 is a schematic plan view of the state of the upper holder and the lower holder when the filter device equipped with the magnetic filter unit of the second embodiment switches the clamps, and (a) is the upper part. It is a schematic diagram which shows a holder, (b) is a schematic diagram which shows a lower holder.

As shown in FIG. 15 described above, after pulling up the magnet bar 10 from the position of the filtration chamber, the operator moves the movement mechanism 200 to the "rotation mechanism 133 of the vertical movement unit 130 and upper holding position" for the filtration device W2. The rotation mechanism 233 of the unit 250 is operated to rotate the lower holder 134 counterclockwise by a predetermined angle, and the rotation mechanism 233 rotates the upper holder 154 clockwise by a predetermined angle. Let As a result, the positions of the lower holder 134 and the upper holder 154 of the filtering device W2 in plan view transition from the state shown in FIG. 14 to the state shown in FIG.
In addition, the vertical position of each component in the cross-sectional view of the filtering device W1 is the same as in FIG. 15 .

Specifically, in FIG. 16, the upper holder 154 clamps and holds the magnet moving shaft 15, and the scraper moving shaft 45 is unclamped and placed in a free state. In addition, the lower holder 134 unclamps the magnet moving shaft 15 and puts it in a free state, and clamps and holds the scraper moving shaft 45 . Accordingly, when the moving mechanism 200 is driven to operate the vertically moving unit 130, only the scraper unit 20 can be moved while maintaining the magnet bar 10 at the upper position.

《Push down the scraper》
Next, a scraper pressing step for removing iron powder (sludge) adhering to the outer peripheral side surface (outer wall surface) of the inner cylinder 12 will be described with reference to FIG. 17 .
Here, FIG. 17 is a schematic cross-sectional view showing a state in which the filtration device including the magnetic filter unit of the second embodiment performs sludge removal processing and pushes down the scraper unit.

After switching the clamps as shown in FIG. retracted and shortened. As a result, the body portion 131 fixed to the tip portion of the piston rod 144 is pushed downward (lowered). At this time, since the lower holder 134 of the main body 131 clamps the sludge moving shaft 45, the filter device W2 is held by the lower holder 134 and descends as the main body 131 descends. Together with the shaft 45, the scraper unit 20 connected to the sludge moving shaft 45 via the connecting plate 48 descends to the state shown in FIG.

In this manner, the second embodiment of the present invention can also obtain the same effects as those of the above-described first embodiment.
That is, according to the present embodiment (first embodiment, second embodiment), the magnetic filter units F1 and F2 are provided with the scraper unit 20 for scraping and removing the iron powder trapped on the surface of the filter. , magnetic filters F1 and F2 can be provided in which the removal rate of iron powder by the scraper unit is improved. Moreover, according to this embodiment, it is possible to provide filtering devices W1 and W2 having the magnetic filter units F1 and F2.

The present invention is not limited to the above-described embodiments (first and second embodiments), and various modifications are possible within the scope of the gist thereof.

For example, in the embodiment described above, the scraping portion 20a is formed in a ring shape, but it is not particularly limited to this. Instead of the ring-shaped scraping portion 20a, a plurality of “semi-circular” or “1/3-circular” scraping portions may be provided.

In the above-described embodiment, the bottom portion 1b of the housing 1 is provided with an opening (not shown) passing through the bottom portion 1b and a bottom cover portion (not shown) capable of opening and closing the opening. By opening the bottom cover and opening the opening, the sludge removed by the scraper unit 20 is discharged from the opening, but this is only an example.
For example, the bottom portion 1b may be detachably attached to the main body portion 1a as shown in FIG. 18 without providing the opening portion and the bottom lid portion. In this case, when the bottom portion 1b is removed from the main body portion 1a, the sludge removed by the scraper unit 20 is discharged from the opening at the lower end of the main body portion 1a. Also in this configuration, the sludge can be easily recovered.

W1, W2... Filtration device

DESCRIPTION OF SYMBOLS 1... Housing 1a... Main-body part 1b... Bottom part 1c... Lid part (upper surface part)
1c1, 1c2, 1c3 through hole 3 filtrate inlet 5 filtrate outlet 7 waterproof case 8 partition plate 8a through hole

F1, F2 ... magnetic filter unit (magnetic filter)
fr... Filtration chamber 10... Magnet bar 11... Outer cylinder 12... Inner cylinder 13... Closing part 15... Magnet moving shafts 15a, 15b... Locking part

Reference Signs List 20 Scraper unit 20a Scraping portion 20b Scraper holding shaft 45 Scraper moving shafts 45a, 45b Locking portion 48 Connecting plate

100, 200 Moving mechanism 130 Vertical moving unit (moving mechanism 100, moving mechanism 200)
131 Main body portion 131a Bottom surface portion 131b Top surface portion 131c Side surface portion 133 Rotating mechanism 134 Lower holder 71 First and second magnet bar/clamp switching holes 71a Small diameter portion 71b Large diameter portion 72 First , 2nd scraper/clamp switching hole

140... Reciprocating motion actuator (moving mechanism 100, moving mechanism 200)
141... Cylinder tube 142... Head cover 143... Rod cover 144... Piston rod

150... Upper holding unit (moving mechanism 100)
151... Base 152... Rotating shaft 154... Upper holder 156... Connecting rod

250... Upper holding unit (moving mechanism 200)
233... Rotating mechanism 233a... Rotating shaft

The present invention, which has been made to solve the above problems, comprises an outer cylinder and an inner cylinder concentrically arranged, a filtration chamber formed in a gap between the outer cylinder and the inner cylinder, and a filter inside the inner cylinder. A magnetic filter unit comprising: a magnetic bar that can be put in and taken out; and a scraper unit that has a scraper unit that slidably abuts against the outer peripheral side surface of the inner cylinder. The mixed iron powder is attracted to the outer peripheral surface of the inner cylinder by the magnetic force of the magnet rod contained in the inner cylinder, and the magnet moving shaft extends upward from the upper end of the magnet rod. a scraper moving shaft connected to the scraper unit; and a moving mechanism provided with one reciprocating motion actuator, wherein the moving mechanism is one of the magnet moving shaft and the scraper moving shaft. Either one of the magnet bar and the scraper unit is selectively held and one of the magnet moving shaft and the scraper moving shaft is vertically moved by the reciprocating actuator. is selectively moved in the vertical direction, and when the scraper unit moves in the vertical direction, the sludge adhering to the outer peripheral side surface of the inner cylinder is removed by the scraping part , The moving mechanism has a rotating mechanism and a substantially flat plate-like holder rotatably supported by the rotating mechanism. A magnet bar/clamp switching hole for switching between holding and releasing, and a scraper/clamp switching hole through which the scraper moving shaft is inserted and for switching between holding and releasing of the scraper moving shaft are provided, and the moving mechanism comprises: The rotation mechanism rotates the holder to switch between holding and releasing the magnet moving shaft by the magnet bar/clamp switching hole, and releasing the scraper moving shaft from holding by the scraper/clamp switching hole. and holding are switched.

Further, the present invention includes an outer cylinder and an inner cylinder arranged concentrically, a filtering chamber formed in a gap between the outer cylinder and the inner cylinder, and a magnet housed in the cylinder of the inner cylinder so that it can be pulled in and out. A magnetic filter unit comprising a rod and a scraper unit having a scraper unit slidably contacting the outer peripheral side surface of the inner cylinder, wherein the iron powder mixed in the filtrate flowing into the filtration chamber is removed from the It is adapted to be attracted to the outer peripheral side surface of the inner cylinder by the magnetic force of the magnet rod housed in the inner cylinder, and the magnet moving shaft extending upward from the upper end of the magnet rod is connected to the scraper unit. and a moving mechanism having one reciprocating motion actuator, the moving mechanism selectively holding one of the magnet moving shaft and the scraper moving shaft. and one of the magnet moving shaft and the scraper moving shaft is vertically moved by the reciprocating actuator to selectively vertically move either the magnet bar or the scraper unit. When the scraper unit moves in the vertical direction, the scraping part removes the sludge adhering to the outer peripheral side surface of the inner cylinder, and the moving mechanism includes the magnet. A vertically moving unit having a plate-like first holder that selectively holds one of the moving shaft and the scraper moving shaft; a base provided above the vertically moving unit; an upper holding unit having a plate-like second holder supported thereon, wherein the reciprocating actuator supports the lower end of the vertically moving unit and reciprocates the vertically moving unit in the vertical direction. When the first holder selects and holds the scraper-moving shaft, the second holder holds the scraper-moving shaft in a state of releasing the holding of the scraper-moving shaft. When the shaft is held and the first holder holds the magnet moving shaft, the scraper moving shaft is held in a state where the magnet moving shaft is released from holding, Further, when the second holder holds the shaft for moving the magnet, the magnet bar is arranged at a height position above the filtration chamber, and holds the shaft for moving the scraper . In some cases, the scraper unit is arranged at a height above the filtering chamber .

The vertical movement unit has a rotation mechanism that rotatably supports the first holder, and the first holder is inserted with the shaft for moving the magnet and holds and holds the shaft for moving the magnet. A first magnet bar/clamp switching hole for switching release and a first scraper /clamp switching hole through which the scraper moving shaft is inserted and for switching between holding and releasing the scraper moving shaft are provided, The second retainer is rotatably supported by the base, has a connecting rod connected to the first retainer , and rotates as the first retainer rotates. Further, the second holder includes a second magnet bar/clamp switching hole for switching between holding and releasing the magnet moving shaft, and a second scraper for switching between holding and releasing the scraper moving shaft. The moving mechanism rotates the first and second holders by the rotating mechanism to move the magnet by the first magnet bar/clamp switching hole of the first holder. Switching between holding and releasing the holding of the shaft, switching between releasing and holding the scraper moving shaft by the first scraper/clamp switching hole, and switching between holding and holding the scraper moving shaft by the second magnet bar/clamp switching hole of the second holder. It is desirable that the magnet moving shaft is switched between holding and holding, and that the scraper moving shaft is switched between holding and holding by the second scraper/clamp switching hole.

Further, the vertical movement unit has a first rotation mechanism that rotatably supports the first holder, and the magnet movement shaft is inserted through the first holder, and the magnet movement shaft is inserted through the first holder. A first magnet bar/clamp switching hole for switching between holding and holding release, and a first clamp/switching hole through which the scraper moving shaft is inserted and for switching between holding and holding release of the scraper moving shaft are provided, The base portion of the upper holding unit is provided with a second rotation mechanism that rotatably supports the second holder. 2. A magnet bar/clamp switching hole and a second scraper /clamp switching hole for switching holding and releasing of the scraper moving shaft are provided. to switch between holding and non-holding of the magnet moving shaft by the first magnet bar/clamp switching hole of the first holder, and the scraper moving shaft by the first scraper/clamp switching hole. and by rotating the second holder by the second rotating mechanism, the magnet moving shaft is released and held by the second magnet bar/clamp switching hole of the second holder. and switching between holding and releasing of holding of the scraper moving shaft by the second scraper/clamp switching hole.

Claims (7)

An outer cylinder and an inner cylinder arranged concentrically, a filtration chamber formed in a gap between the outer cylinder and the inner cylinder, a magnet rod housed in the cylinder of the inner cylinder so that it can be pulled in and out, and the inner cylinder. a scraper unit having a scraping portion slidably abutting on the outer peripheral side surface of the magnetic filter unit,
The iron powder mixed in the filtrate flowing into the filtration chamber is attracted to the outer peripheral side surface of the inner cylinder by the magnetic force of the magnet bar housed in the inner cylinder,
a magnet moving shaft extending upward from the upper end of the magnet bar;
a scraper moving shaft connected to the scraper unit;
a moving mechanism with one reciprocating actuator;
The moving mechanism selectively holds one of the magnet moving shaft and the scraper moving shaft, and vertically moves one of the magnet moving shaft and the scraper moving shaft by the reciprocating actuator. to selectively move either one of the magnet bar and the scraper unit vertically, and when the scraper unit moves vertically, the scraping section moves the A magnetic filter unit, wherein sludge adhering to the outer peripheral side surface of an inner cylinder is removed. The moving mechanism has a rotating mechanism and a substantially flat plate-like holder rotatably supported by the rotating mechanism,
The holder has a magnet bar/clamp switching hole through which the magnet moving shaft is inserted and switches between holding and releasing of the magnet moving shaft, and a scraper moving shaft through which the scraper moving shaft is inserted. A scraper/clamp switching hole for switching between holding and releasing the shaft is provided,
The moving mechanism switches between holding and releasing the magnet moving shaft by the magnet bar/clamp switching hole and moves the scraper by the scraper/clamp switching hole by rotating the holder by the rotating mechanism. 2. A magnetic filter unit according to claim 1, characterized in that it is arranged to switch between release and holding of the yoke. The moving mechanism is
a vertical movement unit including a plate-like first holder that selectively holds one of the magnet moving shaft and the scraper moving shaft;
an upper holding unit having a base provided above the vertical movement unit and a plate-like second holder supported by the base;
The reciprocating actuator supports the lower end of the vertical movement unit and reciprocates the vertical movement unit in the vertical direction,
When the first holder selects and holds the scraper-moving shaft, the second holder holds the magnet-moving shaft with the scraper-moving shaft released from holding, When the first holder holds the magnet moving shaft, the scraper moving shaft is held in a state where the magnet moving shaft is released from holding,
Further, when the second holder holds the magnet moving shaft, the magnet bar is arranged at a height position above the filtration chamber, and the scraper moving shaft is held. 2. A magnetic filter unit as set forth in claim 1, wherein said scraper unit is arranged at a height above said filter chamber in some cases. The vertical movement unit has a rotation mechanism that rotatably supports the first holder,
The first holder includes a first magnet bar/clamp switching hole through which the magnet moving shaft is inserted and for switching between holding and releasing of holding of the magnet moving shaft, and a first magnet bar/clamp switching hole through which the scraper moving shaft is inserted and through which the a first scraper/clamp switching hole for switching between holding and releasing the scraper moving shaft;
The second retainer is rotatably supported by the base and has a connecting rod connected to the first support plate so as to rotate as the first retainer rotates. cage,
Further, the second holder includes a second magnet bar/clamp switching hole for switching between holding and releasing the magnet moving shaft, and a second scraper/clamp switching hole for switching between holding and releasing the scraper moving shaft. A clamp switching hole is provided,
The moving mechanism rotates the first and second holders by the rotation mechanism to switch between holding and releasing the magnet movement shaft by the first magnet bar/clamp switching hole of the first holding fixture, The scraper moving shaft is switched between holding and releasing by the first scraper/clamp switching hole, and the magnet moving shaft is released and held by the second magnet bar/clamp switching hole of the second holder. 4. The magnetic filter unit according to claim 3, wherein the holding and releasing of the scraper moving shaft by the second scraper/clamp switching hole are switched. The vertical movement unit has a first rotation mechanism that rotatably supports the first holder,
A first magnet bar/clamp switching hole through which the magnet moving shaft is inserted and for switching between holding and releasing of the magnet moving shaft, and the scraper moving shaft are inserted through the first holder, and a first clamp/switching hole for switching holding and holding release of the scraper moving shaft;
The base of the upper holding unit is provided with a second rotating mechanism that rotatably supports the second holding fixture,
The second holder has a second magnet bar/clamp switching hole for switching between holding and releasing the magnet moving shaft, and a second scraper/clamp switching hole for switching between holding and releasing the scraper moving shaft. a hole is provided;
The moving mechanism is
By rotating the first holder by the first rotation mechanism, the magnet moving shaft is switched between holding and non-holding by the first magnet bar/clamp switching hole of the first holder, and the first scraper・Switching the holding release and holding of the scraper moving shaft by the clamp switching hole,
By rotating the second holder by the second rotating mechanism, the magnet moving shaft is switched between release and holding of the magnet moving shaft by the second magnet bar/clamp switching hole of the second holder, and the second scraper - The magnetic filter unit according to claim 3, characterized in that holding and releasing of holding of the scraper moving shaft are switched by a clamp switching hole. A filtering device comprising the magnetic filter unit according to any one of claims 1 to 5,
a housing having a hollow cylindrical main body with both ends penetrating through, a bottom covering the lower end of the main body, and a top covering the upper end of the main body;
and a partition plate installed below the inside of the cylinder of the main body of the housing,
the lower end of the magnetic filter unit is installed on the upper surface of the partition plate,
The bottom is provided with an opening penetrating through the bottom and a bottom cover capable of opening and closing the opening. By opening the bottom cover and opening the opening, the scraper unit is A filtering device, wherein the removed sludge is discharged from the opening. A filtering device comprising the magnetic filter unit according to any one of claims 1 to 5,
a housing having a hollow cylindrical main body with both ends penetrating through, a bottom covering the lower end of the main body, and a top covering the upper end of the main body;
and a partition plate installed below the inside of the cylinder of the main body of the housing,
the lower end of the magnetic filter unit is installed on the upper surface of the partition plate,
The bottom portion is detachably attached to the main body portion, and when the bottom portion is removed from the main body portion, the sludge removed by the scraper unit is discharged from the opening at the lower end of the main body portion. A filtering device characterized by:

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