KR20170016337A - Magnetic filter and magnetic substance removal method - Google Patents

Abstract

The magnetic filter (W1) comprises an outer cylinder (1) and an inner cylinder (2) arranged in a concentric circle; A filter chamber 12 formed in the gap between the outer cylinder 1 and the inner cylinder 2; And a magnet unit bar (3) mounted in the cylinder of the inner cylinder (2) so that it can be freely inserted and removed. The magnetic material mixed with the unfiltered liquid flowing to the filter chamber (12) ) Of the inner cylinder (2) by the magnetic force of the magnet unit bar (3) mounted on the inner cylinder (2), and the scraping parts Is provided to the filter chamber 12 and when the scraper 9 is operated the scraping parts 9a are provided on the outer peripheral side of the inner cylinder 2 So that the magnetic material adsorbed to the inner cylinder 2 is scraped.

Description

MAGNETIC FILTER AND MAGNETIC SUBSTANCE REMOVAL METHOD BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method for removing a magnetic filter and a magnetic material, and for example, a magnetic material mixed in a liquid such as a rolling oil used for cold rolling performed in an iron part is separated from a liquid To a magnetic filter capable of cleaning the liquid and a method for removing the magnetic material.

Until now, the magnetic filter has been used in a method for separating magnetic particles (magnetic material) mixed in a liquid from a liquid. Here, the magnetic filter of the related art will be described with reference to Figs. 5 and 6. Fig.

FIG. 5 is a schematic view showing the structure of a magnetic filter according to the related art, wherein FIG. 5 (a) is a schematic sectional view of the magnetic filter and FIG. 5 (b) is a schematic view showing a horizontal sectional view of the magnetic filter . FIG. 6 shows a schematic diagram for explaining a filtering method by a related art magnetic filter and a method of removing a magnetic material from a magnetic filter. (a) is a schematic diagram showing a magnetic filter performing a filtering step, (b) is a schematic diagram showing a magnetic filter performing a backwash step, and (c) Fig.

First, the structure of the related art magnetic filter will be described.

5, the related art magnetic filter 100 includes an outer cylinder 1 and an inner cylinder 2 arranged concentrically, and a magnet (not shown) mounted in the cylinder of the inner cylinder 2 so as to be freely inserted and removed. And a unit bar (3). The outer cylinder 1 and the inner cylinder 2 are made of metal and the like.

In addition, the outer cylinder 1 is formed in the shape of a hollow cylinder with both ends closed and the "unfiltered liquid inlet pipe 5", the "filtered liquid outlet pipe 6", the "backwash liquid inlet pipe 7" &Quot; and " backwash liquid outlet pipe 8 " are connected to the side portion of the outer cylinder 1.

The inner cylinder 2 is formed in a hollow cylindrical shape having a diameter smaller than that of the outer cylinder 1. One end (the lower end in the figure) of the inner cylinder 2 is disposed in the bottom surface portion 1a in the cylinder of the outer cylinder 1, and the one end is clogged to prevent water from leaking. Another end (upper end in the figure) of the inner cylinder 2 penetrates the upper surface portion 1b of the outer cylinder 1 and protrudes from the upper surface portion 1b, and the upper end thereof is opened.

The magnet unit bar 3 is formed in a substantially columnar shape having a diameter smaller than that of the inner cylinder 2 and magnets 4 each having a substantially cylindrical shape are arranged in the inner cylinder 2 so as to be stacked in multi- Lt; / RTI > The magnet unit bar 3 is inserted into the opening at the other end (upper end in the figure) and is mounted in the cylinder of the inner cylinder 2 so as to freely move in the direction of the central axis of the inner cylinder 2.

The magnet unit bar 3 is mounted in the cylinder of the inner cylinder 2 so that the upper end thereof can be fixed by the holding means (not shown), and the lower end thereof is fixed to the inner cylinder 2 by the holding means. And the upper end of the second end portion is positioned at an upper position by a predetermined dimension.

The "unfiltered liquid inlet pipe 5", the "filtered liquid outlet pipe 6", the "backwash liquid inlet pipe 7" and the "backwash liquid outlet pipe 8" The same opening / closing means is provided. The "unfiltered liquid inlet pipe 5", the "filtered liquid outlet pipe 6", the "backwash liquid inlet pipe 7" and the "backwash liquid outlet pipe 8" Open " and " closed " states.

The " unfiltered liquid inlet pipe 5 " is connected to an " unfiltered liquid supply system " having a pump or the like for supplying " unfiltered liquid " ) &Quot; is connected to the reservoir or the like to store the filtered liquid from which the magnetic material has been removed. The "backwashing liquid inlet pipe (7)" is connected to a "backwashed liquid outlet pipe (8)" having a pump or the like for supplying a backwash liquid, and the "backwash liquid outlet pipe A water tank to be discharged, and the like.

In the magnetic filter 100, a gap portion formed between the outer cylinder 1 and the inner cylinder 2 forms a " filter chamber 12 ". The magnetic particles mixed in the " unfiltered liquid " allowed to flow from the " unfiltered liquid inlet pipe 5 " to the " filter chamber 12 " (Outer wall surface) of the inner cylinder 2. As shown in Fig.

Next, the " filtering step " of the magnetic filter 100 will be described.

When the magnetic filter 100 is used in the filtering step, the filtration filter 100 is placed in the state shown in Fig. 6 (a). Specifically, the magnet unit bar 3 is mounted in the cylinder of the inner cylinder 2. In addition, the "unfiltered liquid inlet pipe 5" and the "filtered liquid outlet pipe 6" connected to the outer cylinder 1 are not only placed in the "open" state, 7 " and " backwash liquid outlet pipe 8 " are placed in the " closed state ".

When the " unfiltered liquid " is allowed to flow into the unfiltered liquid inlet pipe 5 in the above state ( open state = yes) , the " unfiltered liquid " ) &Quot; and flows into the filtered liquid outlet pipe 6. At this time, the magnetic particles existing in the unfiltered liquid are adsorbed on the outer peripheral side surface (outer wall surface) of the inner cylinder 2 by the magnetic force of the magnets 4 of the magnet unit bar 3, Quot; The " filtered liquid " from which the magnetic particles have been removed is discharged to the filtered liquid outlet pipe 6.

The magnetic filter 100 is characterized in that the amount of magnetic particles adsorbed to the inner cylinder 2 increases as the " filtering time " increases, and the filtering performance (the ability to remove the magnetic particles) . Thus, the backwashing step is performed periodically in the magnetic filter 100.

Specifically, in the backwashing step, the magnet unit bar 3 mounted on the inner cylinder 2 is pulled up and taken out from the inner cylinder 2 as shown in Fig. 6 (b). In addition, the "unfiltered liquid inlet pipe 5" and the "filtered liquid outlet pipe 6" connected to the outer cylinder 1 are placed in the "closed" state and the "backwash liquid inlet pipe 7" And " backwash liquid outlet pipe 8 " are placed in the " open state ".

In the above state, when the backwash liquid is allowed to flow into the backwash liquid inlet pipe 7, the "backwash liquid" passes through the "filter chamber 12" and flows into the backwash liquid outlet pipe 8 . At this time, magnetic particles from the magnet unit bar 3 do not affect the inner cylinder 2, so that the magnetic particles adsorbed on the outer peripheral side surface (side wall surface) of the inner cylinder 2, (7) to a backwash liquid outlet pipe (8).

When the backwashing step is completed, as shown in Fig. 6 (c), the magnet unit bar 3 taken out is returned into the cylinder of the inner cylinder 2 and mounted therein, and the unfiltered liquid inlet pipe 5 and the filtered liquid outlet pipe 6 are in the "open state" and the backwash liquid inlet pipe 7 and the backwash liquid outlet pipe 8 are in the "closed" state, Set the "wait for filtering" state.

Patent Document 1 discloses a magnetic filter in which a filter body is magnetized by magnets and magnetic particles mixed in a liquid are adsorbed to the filter body, but the inner cylinder 2 does not function as a filter .

Quote list

Patent literature

Patent Document 1: JP-A 7-68109

However, in the magnetic filter 100 of the related art, in order to flush the magnetic particles adsorbed on the outer peripheral side surface of the inner cylinder 2 in the backwashing step, the backwash liquid having a high flow velocity is removed from the filter chamber (12), " which leads to technical problems such as an increase in the size of the system and an increase in the price to realize such a matter.

Specifically, when " filtration " is performed by the magnetic filter 100, the preferred "filtering performance" is that the flow rate of the "unfiltered liquid" By allowing the " unfiltered liquid " to flow. On the other hand, when backwash is performed by the magnetic filter 100, the flow rate of the "backwash liquid" of the "filter chamber 12" should be "3.0 to 6.0 m / s" in order to obtain the desired "backwash performance" It is necessary to allow the inverse liquid to flow. Therefore, when using the magnetic filter 100, it is necessary to provide a large-scale system for backwash, which causes an increase in the system cost for the filtering process.

As the magnetic particles, which can not be completely removed by backwash, remain on the outer peripheral side of the inner cylinder 2 in the magnetic filter 100, the remaining magnetic particles gradually increase during the filtration and backwashing, There is a problem, and therefore the filtering performance (the ability to remove magnetic particles) is degraded. In order to prevent the " deterioration of the filtering performance ", a repair work for disassembling the magnetic filter 100 and cleaning the outer peripheral side surface of the inner cylinder 2 is periodically performed in the present situation, It costs money.

The present inventors have measured the particle distribution of magnetic particles remaining on the outer circumferential side of the inner cylinder 2 after backwash in order to find out the cause of the gradual increase of the remaining magnetic particles during repeated filtration and backwashing.

Specifically, the step of backwashing the magnetic filter 100 is performed after filtering the unfiltered liquid by the magnetic filter 100 for a certain period of time, and thereafter, remaining on the outer peripheral side of the inner cylinder 2 The magnetic particles were measured. &Quot; Water-soluble rolling oil of rolling mill for rolling steel sheet " was used as an unfiltered liquid. In this case, the size of the magnetic particles included in the water-soluble rolling oil is distributed in the range of " 1 to 50 m ". The particle distribution of the magnetic particles remaining on the outer wall surface of the inner cylinder 2 after backwashing was "1 to 10 μm" (the size of the particles is very fine).

According to the above measurement results, the remaining magnetic particles of the magnetic filter 100 after backwashing (magnetic particles having a particle distribution of "1 to 10 μm" in the above measurement), the flow rate of the filter chamber 12 being "3.0 (measured as " 20 m ") of the viscous sub-layer around the outer peripheral side of the inner cylinder 2,

That is, the magnetic particles remaining in the inner cylinder 2 at the time of backwashing have a size smaller than the thickness of the viscous sub-layer (sub-layer having a very slow flow velocity) around the outer peripheral side surface of the inner cylinder 2 , And therefore cleaning with backwash liquid is insufficient, presumably because of the gradual increase in the magnetic particles remaining on the outer circumferential side of the inner cylinder 2.

Instead of using a method of decomposing the magnetic filter 100 to perform regular maintenance, the flow rate of the backwash liquid in the filter chamber 12 is reduced from 3.0 to 6.0 The system cost for backwashing is increased by the above method, although it is possible to consider a method of reducing the thickness of the viscous sublayer by increasing the flow rate to above m / s ".

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of removing magnetic material in a magnetic filter capable of not only reducing system cost of a filtering process and labor of a maintenance work, To provide a magnetic filter.

According to an embodiment of the present invention, there is provided a magnetic filter comprising: a magnetic filter including an outer cylinder and an inner cylinder arranged in a concentric circle; a filter chamber formed in a gap between the outer cylinder and the inner cylinder; The magnetic material mixed with the unfiltered liquid flowing into the filter chamber is adsorbed on the outer peripheral side surface of the inner cylinder by the magnetic force of the magnet unit bar mounted on the inner cylinder, A scraper is provided in the filter chamber with a scraping portion adjacent to an outer peripheral side of the inner cylinder so that it can freely slide, and when the scraper is actuated, In order to scrape the magnetic material adsorbed on the cylinder, It slips further along the outer periphery side.

As described above, the magnetic filter according to the present invention has a structure in which a filter chamber is provided with a scraper that directly scrapes the magnetic material adsorbed to the inner cylinder, and therefore, the magnetic material adsorbed on the magnetic filter is reversed (See FIGS. 5 and 6) in terms of removing the magnetic material adsorbed to the inner cylinder by the magnetic material filter (see FIGS. 5 and 6) (which can be removed without leaving the magnetic material in the inner cylinder). As a result, a magnetic filter is provided according to the present invention in which deterioration of the filtering performance (performance for removing the magnetic material) is prevented.

In addition, when using the structure of the magnetic filter according to the present invention, the magnetic material does not decompose the magnetic filter and can be directly scraped by the scraper, and therefore the number of maintenance operations performed by decomposing the magnetic filter is reduced (Or maintenance work is not required), and the labor for maintenance work can also be reduced.

Further, according to the present invention, it is not necessary to make the backwash liquid flow at a high flow rate by providing the scraper, and the system cost of the filtering process can be reduced as compared with the related art.

A magnetic attraction portion can be provided to the scraper, and when the magnet unit bar mounted on the inner cylinder is taken out from the inner cylinder, the scraper provided with the magnetic portion acts on the magnetic force of the magnet unit bar And the scraping portions can slide along the outer peripheral side of the inner cylinder to scrape the magnetic material adsorbed to the inner cylinder.

As described above, when using the structure according to the present invention, the "step of pulling out the magnet unit bar from the inner cylinder" performed also in the related art (see FIGS. 5 and 6) Is performed to automatically scrape the magnetic material that is adsorbed to the inner cylinder by the portions. That is, it is possible in the present invention to effectively remove the magnetic material adsorbed to the inner cylinder without increasing the working process.

In addition, the magnetic portion is provided in the structure of the present invention, and therefore it is not necessary to install devices such as a motor to operate the scraper, so that a system for a filtering process can be provided at low cost.

According to an embodiment of the present invention, there is also provided a method of removing a magnetic material in a magnetic filter provided with a magnetic portion in a scraper. The method comprises the steps of: as a scraping step, removing a magnet unit bar mounted in an inner cylinder from the inner cylinder so that a scraper provided with a magnetic portion is operated by the action of the magnetic force of the magnet unit bar, A scraping step of sliding along an outer peripheral side of the inner cylinder to scrape the magnetic material adsorbed on the inner cylinder; And a backwash step wherein the backwash liquid is allowed to flow into the filter chamber so that the magnetic material scraped in the scraping step is discharged from the filter chamber together with backwash liquid.

As described above, when the method of removing the magnetic material from the magnetic filter of the present invention is used, a method of directly scraping the magnetic material adsorbed to the inner cylinder by the scraper is adopted, The magnetic material can be effectively removed.

It is not necessary in the present invention to allow the backwash liquid to flow at a high flow rate in the backwash stage, as in the related art, as " the magnetic material adsorbed on the inner cylinder " is removed in the scraping step performed prior to the backwashing step . Thus, when using the method of removing the magnetic material attached to the magnetic filter according to the present invention, the system cost for the filtering process is reduced compared to the related art.

According to an embodiment of the present invention there is also provided a method of removing magnetic material in a magnetic filter in which a magnetic portion is provided in a scraper and a discharge port is provided in a filter chamber. The method comprises the steps of: as a scraping step, a magnetic unit bar is pulled by the magnetic force of a magnet unit bar by pulling up a magnet unit bar mounted in an inner cylinder out of the inner cylinder, and the scraper provided with the magnetic portion A scraping step operated upward with the magnet unit bar, the scraping parts sliding along the outer peripheral side of the inner cylinder to scrape the magnetic material adsorbed to the inner cylinder; And releasing the magnet unit bar pulled out from the inner cylinder and returning the magnet unit bar into the cylinder of the inner cylinder so that the scraper pulled by the magnetic force of the magnet unit bar moves downward together with the magnet unit bar, The magnetic material scraped in the scraping step includes a discharge step that is released from the discharge port by pushing by gravity and a scraper moving downward together with unfiltered liquid remaining in the filter chamber.

As depicted above, there is no need to perform a backwash step in a method of removing magnetic material in accordance with the present invention, so a system for backwashing, such as pumps and backwash liquids, is not needed. That is, when the method of removing the magnetic material from the magnetic filter according to the present invention is used, the system cost for the filtering process can be greatly reduced.

According to the present invention, it is possible to provide a magnetic filter capable of not only reducing the system cost and the maintenance work for the filtering process, but also preventing deterioration of the filtering performance.

1 is a schematic view showing a structure of a magnetic filter according to a first embodiment of the present invention, wherein (a) is a schematic cross-sectional view showing a vertical sectional view of the magnetic filter, and (b) Fig.
FIG. 2 is a schematic view for explaining a filtering process by the magnetic filter and a process of removing the magnetic material from the magnetic filter according to the first embodiment of the present invention. FIG. 2 (a) (B) is a schematic diagram showing a magnetic filter for performing a scraping step, (c) is a schematic diagram showing a magnetic filter for performing a backwashing step, and (d) Is a schematic diagram illustrating a magnetic filter that is in a prior filtering standby state.
3 is a schematic view showing a structure of a magnetic filter according to a second embodiment of the present invention, wherein (a) is a schematic vertical cross-sectional view of the magnetic filter, (b) is a horizontal sectional view of the magnetic filter Fig.
FIG. 4 is a schematic view for explaining the filtering process by the magnetic filter and the process of removing the magnetic material from the magnetic filter according to the second embodiment of the present invention, wherein FIG. 4 (a) (B) is a schematic diagram showing a magnetic filter for performing a scraping step, (c) is a schematic diagram showing a magnetic filter for carrying out a discharge step, and (d) Is a schematic diagram illustrating a magnetic filter that is in a prior filtering standby state.
5 is a schematic view showing a structure of a related art magnetic filter, wherein (a) is a schematic cross-sectional view of the magnetic filter, and (b) is a schematic view showing a horizontal sectional view of the magnetic filter.
6 is a schematic view for explaining a filtering process by a related art magnetic filter and a method of removing a magnetic material from a magnetic filter, wherein (a) is a schematic view showing a magnetic filter for performing a filtering step, and (b) Is a schematic diagram showing a magnetic filter that performs a backwashing step, and (c) is a schematic diagram showing a magnetic filter that is in a filtering standby state before the start of the filtering step.
7 is a schematic view showing a structure of a magnetic filter according to a third embodiment of the present invention, wherein (a) is a schematic vertical sectional view of the magnetic filter, and (b) is a horizontal sectional view of the magnetic filter Fig.
8 is a schematic view showing a structure of a magnetic filter according to a fourth embodiment of the present invention, wherein (a) is a schematic vertical view of the magnetic filter, and (b) is a horizontal sectional view of the magnetic filter Fig.

Hereinafter, the magnetic filters according to the embodiments of the present invention (one embodiment, two embodiments, three embodiments and four embodiments) will be described with reference to the drawings.

In the description of the above embodiments (1 embodiment, 2 embodiment, 3 embodiment and 4 embodiment), the same symbols are used for the same components as the magnetic filter of the related art (Figures 5, 6, 100) Element), and the above description will be simplified.

First, the structure of the magnetic filter according to the first embodiment of the present invention will be described with reference to Fig.

1 is a schematic view showing a structure of a magnetic filter according to a first embodiment of the present invention, wherein (a) is a schematic cross-sectional view of the magnetic filter, and (b) is a schematic view showing a horizontal sectional view of the magnetic filter.

As shown in the figure, the magnetic filter W1 according to the first embodiment includes an outer cylinder 1 and an inner cylinder 2 arranged in a concentric circle, and an inner cylinder 2 in a cylinder of the inner cylinder 2 And a magnet unit bar 3 mounted thereon. The gap portion formed between the inner circumferential surface of the outer cylinder 1 and the outer circumferential surface of the inner cylinder 2 is the " filter chamber 12 ".

(Moveable) in the central axis direction (parallel to the central axis) of the inner cylinder 2 (and the outer cylinder 1) and to slide freely in the filter chamber 12 2 is provided with scraping portions 9a adjacent to the outer peripheral side of the scraper. When the scraper 9 is operated in the direction of the central axis, the scraping parts 9a are arranged on the outer side of the inner cylinder 2 so as to scrape the magnetic material adsorbed on the outer peripheral side surface of the cylinder 2. [ And slides along the peripheral side.

Means for putting the magnet unit bar 3 into the inner cylinder 2 and taking it out are not particularly limited. For example, the magnet unit bar 3 can be put into and taken out of the inner cylinder 2 by a driving device (not shown) having a power source such as a motor, 3) can be manually inserted and taken out by the operator himself.

The outer cylinder 1 is formed in the shape of a hollow cylinder and has an outer cylinder 1 which is formed in the shape of a hollow cylinder and which is connected to the outer cylinder 1 by means of an "unfiltered liquid inlet pipe 5", "a filtered liquid outlet pipe 6" Outlet pipe 8 " is connected to the side portion.

 The inner cylinder 2 is formed in a hollow cylindrical shape having a diameter smaller than that of the outer cylinder 1. One end (the lower end in the figure) of the inner cylinder 2 is disposed in the bottom surface portion 1a in the cylinder of the outer cylinder 1, and the one end is clogged to prevent water from leaking. Another end of the inner cylinder 2 extends through the upper surface portion 1b of the outer cylinder 1 and protrudes from this upper surface portion 1b (the other end of the inner cylinder 2 is open do].

The magnet unit bar 3 is formed in a substantially cylindrical shape having a diameter smaller than that of the inner cylinder 2 and magnets 4 each having a substantially cylindrical shape are fitted in the inner cylinder 2 so as to be stacked in a multi- .

The scraper 9 has a ring-shaped scraping parts 9a (ten scraping parts 9a in the illustrated example) each having a through hole at the center and a scraping part 9a (Four support columns 9b in the example shown) supporting and / securing a plurality of support pillars (magnetic support members) 11, 9b. The scraper 9 and the magnetic force blocks 11 are integrally formed.

 The length dimension h1 from the lower end of the support column 9b to the upper end of the magnetic block 11 is shorter than the length dimension h2 of the outer cylinder 1 in the direction of the center axis.

The scraping parts 9a are formed of metal, synthetic resin or the like. The scraping portions 9a may be formed in a ring shape such as a belt having a predetermined thickness dimension as well as a so-called toroidal ring shape.

The scraping parts 9a are arranged such that the inner peripheral parts of the through holes are freely and slid in parallel with the bottom surface part 1a of the outer cylinder 1a so as to be adjacent to the outer peripheral side of the inner cylinder 2. [ And the outer peripheral edge portions of the scraping portion are supported and fixed to the side portions of the supporting columns 9b. In the illustrated example, by inserting the outer peripheral edge portions into the " notches (grooves) " provided in the side portions of the support columns 9b, the scraping portions 9a are provided on the support columns 9b And the present invention is not limited thereto. The method of fixing the scraping parts 9a to the supporting columns 9b is suitably selected from welding, adhesion, and the like.

Although the example in which a plurality of scraping portions 9a are provided is cited in the first embodiment, the number of scraping portions 9a is appropriately determined. For example, only one scraping portion 9a can be mounted.

The supporting columns 9b are formed of metal, synthetic resin or the like. The supporting columns 9b are formed in a prism shape in the illustrated example, but the supporting columns 9b may be formed in a shape other than a prism shape (for example, a cylindrical shape may be adopted) . Although the four supporting columns 9b in the illustrated example are arranged in an annular arrangement at equal intervals, the number of supporting columns 9b is only an example.

The magnetic force blocks 11 may be formed of a magnetic body (for example, ferritic stainless steel, general structural rolled steel, etc.) attached to the upper end of the support columns 9b by fitting, welding, .

 Although the magnetic force blocks 11 are attached to the upper ends of the support columns 9b in the first embodiment, the present invention is not particularly limited thereto. The magnetic force blocks 11 may be mounted at positions other than the upper ends of the support columns 9b. The magnetic force blocks 11 are preferably mounted in a position where the flow of " unfiltered liquid " or " backwash liquid " flowing into the filter chamber 12 is not restrained. The magnetic force blocks 11 are formed, for example, in the form of a toroidal ring or a ring like a belt.

According to the above structure, the scraper 9 and the magnetic force blocks 11 can move in the direction of the central axis within the range of the " length of the central axis of the outer cylinder 1 ".

The magnetic force blocks 11 are moved in the same direction as the magnet unit bar 3 by the motion of the magnet unit bar 3 because of the attractive force due to the magnetic force between the magnet unit bar 3 and the magnetic force blocks 11.

That is, when the magnet unit bar 3 moves in the direction of the central axis, the scraper 9 attached to the magnetic force blocks 11 pulled by the magnet unit bar 3 is moved in the same direction as the magnet unit bar 3 Direction. At this time, since the scraping portions 9a of the scraper 9 slide along the outer peripheral side surface of the inner cylinder 2, the magnetic material adsorbed to the inner cylinder 2 is scraped.

Next, the " filtering process " and the " process of removing the magnetic material " of the magnetic filter W1 according to the first embodiment will be described with reference to FIG.

FIG. 2 is a schematic view for explaining a process of filtering by a magnetic filter and a process of removing a magnetic material from the magnetic filter according to a first embodiment of the present invention, wherein (a) is a schematic view showing a magnetic filter for performing a filtering step (B) is a schematic diagram showing a magnetic filter for performing a scraping step, (c) is a schematic view showing a magnetic filter performing a backwashing step, and (d) shows a filtering waiting state before the start of the filtering step Magnetic filter. Fig.

First, the steps of the " filtering process " (filtering step) performed by the magnetic filter W1 will be described.

When the magnetic filter W1 is used in the filtering step, the magnetic filter W1 is placed in the state shown in Fig. 2 (a). Specifically, the magnet unit bar 3 is placed in a state of being mounted in the cylinder of the inner cylinder 2. The "unfiltered liquid inlet pipe (5)" and the "filtered liquid outlet pipe (6)" connected to the outer cylinder (1) are placed in an open state and "backwash liquid inlet pipe (7)" and "backwash liquid outlet Pipe 8 " is placed in the closed state.

If the "unfiltered liquid" is allowed to flow into the "unfiltered liquid inlet pipe 5" in the above state, the "unfiltered liquid" passes through the "filter chamber 12" Filtered liquid outlet pipe 6 ". At this time, the magnetic particles existing in the unfiltered liquid are adsorbed on the outer peripheral side surface (outer wall surface) of the inner cylinder 2 by the magnetic force of the magnets 4 of the magnet unit bar 3, Filtered liquid " leaves the " filtered liquid outlet pipe 6 ".

Next, the steps of the " process of removing the magnetic material " of the magnetic filter W1 will be described.

A scraping step in which the magnetic material adsorbed to the inner cylinder 2 is directly scraped in the " process of removing the magnetic material ", and the magnetic material scraped in the scraping step is " &Quot; is performed when the filtering process is stopped.

In the scraping step, the "unfiltered liquid inlet pipe 5", the "filtered liquid outlet pipe 6", the "backwash liquid inlet pipe 7" and the "backwash liquid" Outlet pipe 8 " is placed in the closed state as shown in Fig. 2 (b).

The magnet unit bar 3 mounted in the inner cylinder 2 moves in the direction of the central axis of the inner cylinder 2 and pulls out the inner cylinder 2 in the above state (pulling the magnet unit bar upward). At this time, the " scraper 9 to which the magnetic force blocks 11 are attached " pulled by the magnetic force of the magnet unit bar 3 operates in the same direction as the magnet unit bar 3 (moves). That is, the "scraper 9" can be moved upward by pulling the magnet unit bar 3. When the scraper 9 is moved up (moved) together with the magnet unit bar 3, the scraping portion 9 of the scraper 9 is moved to scrape the magnetic material adsorbed on the outer peripheral side of the inner cylinder 2 The magnetic material 9a slides along the outer circumferential side surface of the inner cylinder 2 so that the magnetic material adsorbed on the outer circumferential side surface is peeled from the outer circumferential side surface.

When the scraping step is completed, a backwashing step is carried out and the magnetic material stripped from the inner cylinder 2 is discharged to the " filter chamber 12 ".

Specifically, as shown in Fig. 2 (c), the "unfiltered liquid inlet pipe 5" and the "filtered liquid outlet pipe 6" connected to the outer cylinder 1 are placed in the closed state Backwash liquid inlet pipe 7 " and " backwash liquid outlet pipe 8 " are in an open state. In the backwashing step, the magnet unit bar 3 is in a state of being taken out from the inner cylinder 2 (the state shown in Fig. 2 (c)).

 When the backwash liquid is allowed to flow into the backwash liquid inlet pipe 7 in the above state, the "backwash liquid" passes through the "filter chamber 12" and flows into the "backwash liquid outlet 8". At this time, the magnetic material scraped in the scraping step is discharged to the " filter chamber 12 " together with the backwash liquid.

When the process of removing the magnetic material (scraping step and backwashing step) is completed, the magnet unit bar 3 taken out from the inner cylinder 2 returns to the cylinder of the inner cylinder 2 so as to be in the mounted state. The magnet unit bar 3 moves in the direction of the central axis of the inner cylinder 2 (moves downward) and returns into the cylinder of the inner cylinder 2 and the scraper 9 is also moved together with the magnet unit bar 3 And the supporting columns 9b are located on the bottom surface portion 1a of the outer cylinder 1. [ Thereafter, when the unfiltered liquid inlet pipe 5 and the filtered liquid outlet pipe 6 are placed in the open state as well as the backwash liquid inlet pipe 7 and the backwash liquid outlet pipe 8 are placed in the closed state , The state is placed in a filtering waiting state where the filtering step can be started as shown in Fig. 2 (d).

As described above, in the method of removing the magnetic filter according to the first embodiment, the magnet unit bar 3 moves in the direction of the center axis of the inner cylinder 2 and is taken out from the inner cylinder 2 The scraper 9 automatically moves in the same direction as the magnet unit bar 3 and the scraping portions 9a scrape the magnetic material adsorbed to the inner cylinder 2, The magnetic material adsorbed to the cylinder can be effectively removed without performing a specific operation for scraping the magnetic material. That is, when "the step of taking out the magnet unit bar 3 from the inner cylinder" is carried out also in the related art magnetic filter (see FIGS. 5 and 6), the scraping parts 9a, The magnetic material adsorbed by the magnetic material 2 is automatically scraped.

As the magnetic material adsorbed on the inner cylinder 2 is directly scraped by the scraper 9 and peeled off from the inner cylinder 2 in the first embodiment, the magnetic material is peeled off (see FIG. 6) The magnetic material can be effectively removed as compared with the related art method. As a result, the "filtering performance (performance for removing the magnetic material)" degradation of the magnetic filter is prevented according to the first embodiment.

According to the first embodiment, since the magnetic material can be directly scraped by the scraper 9 without disassembling the magnetic filter W1, the magnetic material W1 can be directly scraped by the scraper 9, The number of times can be reduced (or maintenance work is not required), and labor for maintenance work can also be reduced.

As a method of directly scraping the magnetic material adsorbed to the inner cylinder 2 by the scraper 9 is adopted, it is necessary to allow the backwash liquid to flow at a high flow rate in the backwash stage, as in the related art There is no. As a result, the system cost for the filtering process according to the first embodiment is reduced as compared with the related art.

In addition, the backwashing step is performed after the magnetic material has been stripped from the inner cylinder 2 in the scraping step, thereby releasing the magnetic material from the filter chamber 12 easily and roughly completely.

As described above, according to the first embodiment, it is possible to provide the magnetic filter W1 that can reduce the system cost of the filtering process and the labor of the maintenance work, as well as prevent deterioration of the filtering performance .

Next, a magnetic filter according to a second embodiment of the present invention will be described.

 The second embodiment can be established by partially changing the first embodiment. Therefore, components different from those of the first embodiment will be described, and description of the same components as those of the first embodiment will be omitted. In the second embodiment, the same symbols are added to the same components (or corresponding components) as the components of the magnetic filter (Figs. 1 and 2, W1) according to the first embodiment.

First, the structure of the magnetic filter W2 according to the second embodiment of the present invention will be described with reference to Fig.

FIG. 3 is a schematic view showing a structure of a magnetic filter according to a second embodiment of the present invention, in which (a) is a schematic view showing a vertical sectional view of the magnetic filter, and (b) is a schematic diagram showing a horizontal sectional view of the magnetic filter.

As shown in the drawing, the magnetic filter W2 according to the second embodiment is characterized in that an iron powder discharge portion 13 is provided at a lower end portion of the outer cylinder 1, 7 " and " backwash liquid outlet pipe 8 " are not connected to the outer cylinder 1, and the lower end portion of each support column 9b has a substantially L- The structure other than the first embodiment is the same as that of the first embodiment.

Specifically, the iron discharge portion 13 having a hollow cylindrical shape for interchanging with the filter chamber 12 is provided at the lower end portion of the outer cylinder 1. The iron discharge portion 13 is formed to have a diameter smaller than that of the outer cylinder 1 but also to have a diameter larger than that of the inner cylinder 2 and is provided with an iron release port 13a are provided at the lower end of the outer cylinder 1. [

In the illustrated example, the inner cylinder 2 penetrates the bottom surface portion 1a of the outer cylinder 1 and extends to the position of the iron release port 13a, but the present invention is not particularly limited thereto. The lower end portion of the inner cylinder 2 is mounted to the bottom surface portion 1a in the cylinder of the outer cylinder 1 in the same manner as in the first embodiment.

In the second embodiment, when the filtering step and the scraping step are performed, the iron discharge port 13a is placed in the closed state. When the "release step" to be described later is performed, the iron release port 13a is placed in the open state.

Further, in the second embodiment, as an example, the lower end portions of each of the supporting columns 9b having a prism shape are formed in a substantially L-shape in cross section. The reason why the lower end portion of the supporting column 9b is formed in a substantially L shape as described above is to facilitate the discharge of the magnetic material by widening the opening of the iron discharge port 13a in the discharging step to be described later .

Next, the " filtering process " and the " process of removing the magnetic material " using the magnetic filter W2 according to the second embodiment will be described with reference to FIG.

FIG. 4 is a schematic view for explaining a process of filtering by a magnetic filter and a process of removing a magnetic material from the magnetic filter according to a second embodiment of the present invention, wherein (a) is a schematic view showing a magnetic filter for performing a filtering step (B) is a schematic view showing a magnetic filter for performing a scraping step, (c) is a schematic view showing a magnetic filter for carrying out a discharge step, and (d) Magnetic filter. Fig.

First, the steps of the " filtering process (filtering step) " using the magnetic filter W2 will be described.

When the magnetic filter W2 is used in the filtering step, the magnetic filter W2 is placed in the state shown in Fig. 4 (a). Specifically, the magnet unit bar 3 is placed in the state of being mounted in the inner cylinder 2. Quot; unfiltered liquid inlet pipe 5 " and " filtered liquid outlet pipe 6 " connected to the outer cylinder 1 are placed in the open state and connected to the iron discharge port 13a Is in a closed state.

If the " unfiltered liquid " is allowed to flow into the " unfiltered liquid inlet pipe 5 " in the above state, the magnetic particles remaining in the unfiltered liquid will pass through the magnets of the magnet unit bar 3 Filtered liquid ", in which the magnetic particles are removed in the same manner as in the first embodiment, is adsorbed on the outer peripheral side surface of the inner cylinder 2 by the magnetic force of the filter liquid outlet pipe 6, &Quot;

Next, the steps of the " process of removing the magnetic material " of the magnetic filter W2 will be described.

A scraping step in which the magnetic material adsorbed to the inner cylinder 2 is directly scribed, and a magnetic material scraped in the scraping step is applied to the " filter chamber 12 " Is performed when the filtering step is stopped.

In the scraping step, the "unfiltered liquid inlet pipe 5" and the "filtered liquid outlet pipe 6" connected to the outer cylinder 1 are in a closed state as shown in FIG. 4 (b) Is set. The iron discharge port 13a provided at the lower end of the outer cylinder 1 is in the closed state. Thereafter, the same steps as in the first embodiment are performed to remove the magnetic material adsorbed on the outer peripheral side surface of the inner cylinder 2. [ More specifically, when the magnet unit bar 3 mounted in the inner cylinder 2 is pulled out of the inner cylinder 2 and taken out, the scraper 9 is moved in the same manner as in the first embodiment, (Moves) together with the magnet unit bar 3 by the magnetic force of the bar 3. When the scraper 9 is operated upward with the magnet unit bar 3, the scraping parts 9a (9a) of the scraper 9 to scrape the magnetic material adsorbed on the outer peripheral side surface of the inner cylinder 2 Is slid along the outer peripheral side surface of the inner cylinder 2 so that the magnetic material adsorbed on the outer peripheral side surface of the inner cylinder 2 is peeled off from the outer peripheral side surface.

Next, the release step performed after the scraping step will be described.

 Specifically, as shown in Fig. 4 (c), the "unfiltered liquid inlet pipe 5" and the "filtered liquid outlet pipe 6" connected to the outer cylinder 1 are in a closed state Same condition as the raping step).

Thereafter, the iron discharge port 13a provided at the lower end of the outer cylinder 1 is placed in the open state, and the magnet unit bar 3 pulled out from the inner cylinder 2 and taken out is again driven by the inner cylinder 2 ) To the cylinder. When the magnet unit bar 3 is pulled back into the cylinder of the inner cylinder 2 the scraper 9 moves down with the magnet unit bar 3 and the supporting columns 9b are moved to the outer cylinder 1 on the bottom surface portion 1a.

In the release step, the magnetic material scraped in the scraping step is transferred to the scraper 9, which moves down (moving) with the " unfiltered liquid " remaining in the filter chamber 12, (Toward the direction of the iron discharge port 13a) and is discharged from the iron discharge port 13a.

Unfiltered liquid inlet pipe 5 " and " filtered liquid outlet pipe 6 " connected to the outer cylinder 1 after the process of removing the magnetic material (scraping and discharging) The iron release port 13a provided at the lower end of the outer cylinder 1 is placed in the closed state as shown in Fig. 4 (d), and the state is a state in which the " Standby state ".

As described above, the method of directly scraping the magnetic material adsorbed to the inner cylinder 2 by the scraping step in the same manner as in the first embodiment is adopted also in the second embodiment, The operating effect as in the embodiment can be obtained. As the " backwash stage " is not performed in the second embodiment, a system for backwash (pump to supply backwash water etc.) is not mandatory and the system cost is reduced compared to the magnetic filter W1 according to the first embodiment Can be saved.

Next, a magnetic filter according to a third embodiment of the present invention will be described with reference to Fig.

FIG. 7 is a schematic view showing a structure of a magnetic filter according to a third embodiment of the present invention, wherein FIG. 7A is a schematic view showing a vertical sectional view of the magnetic filter, and FIG. 7B is a schematic view showing a horizontal sectional view of the magnetic filter .

The third embodiment is an embodiment in which the scraper (see FIG. 1) used in the first embodiment is changed to a scraper 19 formed in a spiral shape, and the components other than the scraper 19 are arranged in the first Is the same as the example component. Therefore, the constituent elements of the first embodiment and other constituent elements will be described below, and the description of the same constituent elements as those of the first embodiment is omitted or simplified. In the third embodiment, the same symbols are added to the same components as the magnetic filter W1 of the first embodiment.

As shown in the figure, the magnetic filter W3 according to the third embodiment has the outer cylinder 1, the inner cylinder 2, and the inner cylinder 2 so as to be freely put in and taken out in the same manner as in the first embodiment, And a magnet unit bar (3) mounted in the cylinder of the magnet unit. In the filter chamber 12 formed between the inner circumferential side surface of the outer cylinder 1 and the outer circumferential side surface of the inner cylinder 2 in the direction of the central axis of the inner cylinder 2 (and of the outer cylinder 1) A scraper 19 is provided adjacent to the outer peripheral side surface of the inner cylinder 2 so as to be operated (moved) and slid freely (parallel to the central axis).

The scraper 19 is formed in a spiral shape having an inner diameter equal to or slightly larger than the diameter of the inner cylinder 2 and extends from one end of the inner cylinder 2 to the other end of the inner cylinder 2 2). The inner peripheral edge portions of the scraper 19 in the form of a spiral correspond to scraping portions 19a and the scraper 19 is fixed to the outer side of the cylinder 2 so that the scraping portions 19a can freely slide And is fitted to the outer peripheral surface of the inner cylinder 2 in a state adjacent to the peripheral surface. The scraper 19 is formed of metal, synthetic resin or the like.

The magnetic force blocks 11 are provided at one end portion (top end portion in the drawing) of the scraper 19 (the magnetic force blocks 11 are attached to one end portion of the scraper 19) ). The length dimension h10 from the other end portion (lower end portion in the drawing) of the scraper 19 to the upper end portion of the magnetic force blocks 11 is equal to the length dimension h2 of the outer cylinder 1 in the " ) (H10 < h2).

Although the other end portion (the lower end portion in the drawing) of the scraper 19 is disposed at a position away from the bottom surface portion 1a in the cylinder of the outer cylinder 1 ), The present invention is not limited thereto. The other end portion (the lower end portion in the drawing) of the scraper 19 extends to the bottom end portion 1a in the cylinder of the outer cylinder 1, It is preferable to be adjacent to the bottom surface portion 1a of the inside.

According to the third embodiment, when the magnet unit bar 3 moves in the direction of the central axis, the scraper 19 (to which the magnetic force blocks 11 pulled by the magnet unit bar 3 are attached) Is operated in the same direction as the magnet unit bar 3 in the same manner as in the first embodiment. At this time, the scraping portions 19a of the scraper 19 are slid along the outer peripheral side surface of the inner cylinder 2, so that the magnetic material adsorbed to the inner cylinder 2 is scraped.

As described above, according to the third embodiment, when the magnet unit bar 3 moves in the direction of the central axis of the inner cylinder 2 and is taken out of the inner cylinder 2, Is moved automatically in the same direction as the magnet unit bar 3 and the scraping portions 19a scrape the magnetic material adsorbed to the inner cylinder 2 to produce the same operating effect as that of the first embodiment described above Can be obtained.

In addition, the scraper 19 according to the third embodiment has a spiral shape, and does not have a structure in which a plurality of components are assembled like the scraper 9 according to the first embodiment (the scraping parts 9a ) Are attached to the scraping support columns 9b so as to have higher durability than the scraper 9 according to the first embodiment by being formed by one component.

In addition, the number of the components of the scraper 19 according to the third embodiment is smaller than the number of the components of the scraper 9 according to the first embodiment, as well as the number of the " scraping support columns 9b " the work of attaching the fit scraping portions 9a " is unnecessary, thereby achieving an operating effect of cost reduction.

Next, a magnetic filter according to a fourth embodiment of the present invention will be described with reference to Fig.

FIG. 8 is a schematic view showing a structure of the magnetic filter according to the fourth embodiment of the present invention, wherein FIG. 8A is a schematic view showing a vertical sectional view of the magnetic filter, FIG. 8B is a schematic view showing a horizontal sectional view of the magnetic filter to be.

The fourth embodiment is an example in which a scraper 29 (see FIG. 1) used in the first embodiment is changed to a scraper 29 formed in a cylindrical shape with a window, and the components except the scraper 29 are arranged in a first The same as the example components. Therefore, components different from those of the first embodiment will be described below, and description of the same components as those of the first embodiment is omitted or simplified. In the fourth embodiment, the same symbols are added to the same components (or the corresponding components) as the magnetic filter W1 of the first embodiment.

As shown in the figure, the magnetic filter W4 according to the fourth embodiment includes the outer cylinder 1, the inner cylinder 2, and the inner cylinder 2 (not shown) so as to be freely inserted and taken out in the same manner as in the first embodiment. And a magnet unit bar 3 mounted in the cylinder of the magnet unit bar 3. The filter chamber 12 formed between the inner circumferential side surface of the outer cylinder 1 and the outer circumferential side surface of the inner cylinder 2 is provided with a plurality of A scraper 29 is provided adjacent to the outer peripheral side surface of the inner cylinder 2 so as to be movable (in a direction parallel to the central axis) and slid freely.

The scraper 29 is formed in a hollow cylindrical shape (hollow cylindrical shape penetrating both ends) having an inner diameter equal to or slightly larger than the diameter of the inner cylinder 2, and the plurality of window holes 29a are formed at a predetermined interval Is formed in the side portions along both directions of the " circumferential direction and the direction of the central axis (vertical direction in the drawing) ", and the side portions have a grid pattern due to the window holes 29a.

The inner side surface of the side surface of the scraper 29 formed in a lattice pattern corresponds to the scraping portions 29a1 and the scraper 29 is provided on the inner side surface of the cylinder 2 so that the scraping portions 29a1 can freely slide The outer circumferential surface of the inner cylinder 2 abuts against the outer circumferential surface of the inner cylinder 2. [ The scraper 29 is formed of metal, synthetic resin or the like.

The magnetic force blocks 11 are provided at one end portion of the scraper 29 (the magnetic force blocks 11 are attached to one end portion of the scraper 29) . The length dimension h10 from the other end portion (lower end portion in the drawing) of the scraper 29 to the upper end portion of the magnetic force block 11 is defined as the length dimension h2 of the outer cylinder 1 in the " ) (H10 < h2).

Although the other end portion (the lower end portion in the drawing) of the scraper 29 is disposed at a position away from the bottom surface portion 1a in the cylinder of the outer cylinder 1 ), The present invention is not limited thereto. The other end portion (the lower end portion in the drawing) of the scraper 29 extends to the bottom surface portion 1a in the cylinder of the outer cylinder 1, It is also preferable to be adjacent to the bottom surface portion 1a of the inside.

According to the fourth embodiment, when the magnet unit bar 3 moves in the direction of the central axis, the scraper 29 to which the magnetic force blocks 11 pulled by the magnet unit bar 3 are attached, Is operated in the same direction as the magnet unit bar 3 in the same manner as in the first embodiment. At this time, the scraped portions 29a1 of the scraper 29 move along the outer peripheral side surface of the inner cylinder 2, so that the magnetic material adsorbed to the inner cylinder 2 is scraped.

As described above, according to the fourth embodiment, when the magnet unit bar 3 moves in the direction of the central axis of the inner cylinder 2 and is taken out of the inner cylinder 2, Is moved automatically in the same direction as the magnet unit bar 3 and the scraping portions 29a scrape the magnetic material adsorbed to the inner cylinder 2 to produce the same operating effect as the first embodiment described above Can be obtained.

In addition, the scraper 29 according to the fourth embodiment has a cylindrical shape, and does not have a structure in which a plurality of components are assembled like the scraper 9 according to the first embodiment (the scraping parts 9a ) Are attached to the scraping support columns 9b so as to have higher durability than the scraper 9 according to the first embodiment by being formed by one component.

In addition, the number of the components of the scraper 29 according to the fourth embodiment is smaller than the number of the components of the scraper 9 according to the first embodiment, as well as the number of the " scraping support columns 9b " A work for attaching the scraping parts 9a " is not required, thereby achieving an operation effect of cost reduction.

The present invention is not limited to the above embodiments (1, 2, 3, and 4 embodiments), and various modifications may be made within the scope of the present invention.

For example, the "unfiltered liquid inlet pipe 5", the "filtered liquid outlet pipe 6", the "backwash liquid inlet pipe 7" and the "backwash liquid outlet pipe 8" Although connected in one embodiment, the present invention is not limited thereto. It is also possible to adopt a structure in which an apparatus such as a switching valve for separating the pipe from the outer surface of the outer cylinder 1 is provided to connect only the inlet pipe and the outlet pipe in the outer cylinder 1. [

The magnetic force blocks 11 shown in the embodiments (12, 3 and 4 embodiments) are only one example. The component is not required to have a block shape so long as the component allows the scraper 9 to operate in the same direction as the magnet unit bar 3.

Although the scraping portions 9a are formed in a ring shape in the above-described first and second embodiments, the present invention is not limited thereto. It is also desirable to employ a structure provided with a plurality of scraping portions 9a having a " semicircular " or " one-third circular shape "

In the scraping step of the first and second embodiments, the operating direction of the scraper 9 is the same as that of the magnet unit bar 3, but the operating direction of the magnet unit bar 3 is only one example . When the magnet unit bar 3 is taken out from the inner cylinder 2, the scraper 9 is operated by the action of the magnetic force of the magnet unit bar 3 and the scraping parts 9a are moved It is sufficient to slide along the outer peripheral side surface of the cylinder 2.

For example, there is provided an apparatus for converting the translational motion of the scraper 9 into rotational motion, and the scraper 9 is adapted to move the magnet unit bar 3 out of the inner cylinder 2, It is also desirable to cause rotational motion by means of the motor. It is additionally desirable to move the scraper 9 in a direction opposite to the magnet unit bar 3 by providing a reversing device for operating the scraper 9 in a direction opposite to the direction of operation of the magnet unit bar 3.

It is also preferable that the scraper 19 according to the third embodiment (or the scraper 29 according to the fourth embodiment) is mounted on the magnetic filter W2 instead of the scraper 9 according to the second embodiment.

W1, W2, W3, W4 Magnetic filters
1 Outer cylinder
1a Floor surface part (outer cylinder)
1b Top surface portion (outer cylinder)
2 internal cylinder
3 magnet unit bar
4 magnets
5 Unfiltered liquid inlet pipe
6 Filtered liquid outlet pipe
7 Backwash liquid inlet pipe
8 Backwash liquid outlet pipe
9 Scraper
9a Scraping section (scraper)
9b Supporting column (scraper)
9b1 leg part (support circumference)
11 Magnetic blocks
12 filter chamber
13 Iron release part
13a Iron release port (iron release section)
19 Scraper
19a Scraping section (scraper)
29 Scraper
29a Window Holes (Scraper)
29a1 Scraping section (scraper)

Claims (4)

An outer cylinder and an inner cylinder arranged concentrically;
A filter chamber formed in a gap between the outer cylinder and the inner cylinder; And
And a magnet unit bar mounted in the cylinder of the inner cylinder so as to be freely inserted and removed,
The magnetic material mixed with the unfiltered liquid flowing into the filter chamber is adsorbed on the outer peripheral side surface of the inner cylinder by the magnetic force of the magnet unit bar mounted on the inner cylinder,
A scraper is provided in the filter chamber with scraping portions adjacent to the outer peripheral side of the inner cylinder so as to freely slide, and when the scraper is actuated, the scraping portions are provided on the outer peripheral side of the inner cylinder And scribing the magnetic material adsorbed to the inner cylinder by sliding along the inner cylinder. The method according to claim 1,
A magnetic portion is provided on the scraper, and
When the magnet unit bar mounted in the inner cylinder is taken out from the inner cylinder, the scraper provided with the magnetic portion is operated by the action of the magnetic force of the magnet unit bar,
Wherein the scraping parts slide along the outer peripheral side of the inner cylinder to scrape the magnetic material adsorbed to the inner cylinder. A method of removing a magnetic material in a magnetic filter according to claim 1, wherein a magnetic portion is provided in the scraper, the method comprising:
The scraping step is carried out by pulling the magnet unit bar mounted in the inner cylinder out of the inner cylinder so that the scraper provided with the magnetic portion is operated by the action of the magnetic force of the magnet unit bar, A scraping step of sliding along the outer peripheral side of the inner cylinder to scrape the adsorbed magnetic material; And
Wherein the backwashing step includes allowing the backwash liquid to flow into the filter chamber so that the magnetic material scraped in the scraping step is discharged from the filter chamber together with backwash liquid. A method of removing magnetic material in a magnetic filter according to claim 1, wherein a magnetic portion is provided in the scraper and a discharge port is provided in the filter chamber, the method comprising:
A scraping step of pulling up a magnet unit bar mounted in an inner cylinder to take it out of the inner cylinder so that the magnetic force portion is pulled by the magnetic force of the magnet unit bar, The scraping portions being slid along the outer peripheral side of the inner cylinder to scrape the magnetic material adsorbed to the inner cylinder; And
In the discharging step, the magnet unit bar pulled out from the inner cylinder is pulled down and the magnet unit bar is returned into the cylinder of the inner cylinder, so that the scraper pulled by the magnetic force of the magnet unit bar moves downward together with the magnet unit bar, Wherein the magnetic material scraped in the lapping step includes a release step that is released from the discharge port by pushing by gravity and a scraper moving downward with the unfiltered liquid remaining in the filter chamber.

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