KR20120020974A - Metal edge filter apparatus having a function of cleaning filter cartridge through sensing pressure gap - Google Patents

Abstract

The present invention relates to a metal edge filter device for cleaning the filter by detecting the differential pressure, according to a preferred embodiment of the present invention, the first space is provided inside, the lower end is connected to the drain valve for discharging foreign matter, one side The housing is provided with an inlet for introducing the cutting oil containing foreign matter, the other side is provided with an outlet for discharging the cutting oil is removed foreign matter; A cylindrical filter cartridge installed axially rotatable in the first space, having a second space formed therein, and having a plurality of filter holes formed therein; And a scraper installed vertically on the outside of the filter cartridge and having an end elastically biased to the surface of the filter cartridge, and rotating the filter cartridge by sensing a differential pressure generated between the first space portion and the second space portion. Provided is a metal edge filter device for detecting a differential pressure and cleaning a filter, wherein a foreign substance on the surface of the filter cartridge is removed by a scraper.

Description

METAL EDGE FILTER APPARATUS HAVING A FUNCTION OF CLEANING FILTER CARTRIDGE THROUGH SENSING PRESSURE GAP}

The present invention relates to a metal edge filter device, and more particularly, to a metal edge filter device that separates solids of a predetermined size or more from cutting oil and lubricating oil, wherein the function of cleaning the filter cartridge by sensing a differential pressure inside and outside the filter cartridge is provided. It has a metal edge filter device having.

In general, in the facilities for machining, cutting oil is used for lubrication and cooling between the tool and the workpiece, and the cutting oil is repeatedly used in a machine or a facility for a certain period of time. At this time, the foreign matter such as cutting chips (chip) contained in the cutting oil is removed and reused.

However, when reusing the coolant which must be continuously provided during machining such as cutting, drilling, boring, etc. on the workpiece as described above, it is necessary to remove foreign matters such as cutting chips included in the cutting oil. In the filtration apparatus using the filter, especially when a large amount of cutting chips are contained, the filtration efficiency is low and the removal of the cutting chips from the cutting oil is not performed properly, so that the content of foreign matters is high when the cutting oil is reused. There is a problem falling.

In addition, when the filter is composed of a metal mesh net for improved durability, foreign matter is attached to the mesh net when it is used continuously for a long time, so the filtering efficiency is reduced. However, it is inconvenient to prepare and replace another metal mesh net.

The present invention has been made to solve the above problems, an embodiment of the present invention, by detecting the internal and external pressure difference of the filter cartridge composed of a metal mesh network to rotate the filter cartridge, It relates to a metal edge filter device that allows foreign matter adhering to a surface to be removed by a scraper.

According to a preferred embodiment of the present invention, the first space is provided therein, a drain valve for discharging foreign matters is connected to the lower end, one side is provided with an inlet through which cutting oil containing foreign matters is introduced, and the other side is removed. A housing provided with an outlet for discharging the cutting oil; A cylindrical filter cartridge installed axially rotatable in the first space, having a second space formed therein, and having a plurality of filter holes formed therein; And a scraper installed vertically on the outside of the filter cartridge and having an end elastically biased to the surface of the filter cartridge, and rotating the filter cartridge by sensing a differential pressure generated between the first space portion and the second space portion. Provided is a metal edge filter device for detecting a differential pressure and cleaning a filter, wherein a foreign substance on the surface of the filter cartridge is removed by a scraper.

In this case, the filter cartridge may further include an air injection tube installed perpendicular to the inside of the filter cartridge so as to face an end of the scraper, and spraying high pressure air supplied from the outside when the filter cartridge rotates to remove foreign substances on the surface of the filter cartridge. have.

On the other hand, the housing is configured to include a cylindrical lower housing having a first space is formed therein, and an upper housing coupled to the upper end of the lower housing to open and close the first space, the filter cartridge is rotatable in the upper housing Combined.

In addition, the upper housing is provided with a rotating shaft, the upper holder is coupled to the upper end of the filter cartridge, the rotating shaft and the upper holder is coupled by a rotating bracket, the rotation of the filter cartridge is made by the rotation of the rotating shaft.

At this time, the lower end of the filter cartridge is supported by the pedestal, the pedestal is coupled to the upper housing by at least one pedestal support shaft.

In addition, the lower end of the scraper support shaft is coupled to one side of the pedestal, the upper end of the scraper support shaft is coupled to one side of the upper housing, the scraper is coupled to one side of the scraper support shaft, the scraper support shaft is interposed with at least one torsion spring, The end of the scraper is elastically biased to the surface of the filter cartridge.

According to the metal edge filter device for cleaning the filter by detecting the differential pressure according to an embodiment of the present invention, it is possible to continuously remove the foreign matter, such as chips from the cutting oil used, high regeneration efficiency, a large amount within a short time Since it is possible to perform the filtering operation on the coolant, it is excellent in utility as a preliminary filtering means performed before the precise filtering process.

In addition, since the foreign matter adhering to the filter cartridge can be effectively removed during long time use, it is possible to reduce the time and cost required for maintenance and repair, and to maintain uniform filtering performance.

1 is a cross-sectional view showing a filtering process of cutting oil in a metal edge filter device according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the flow of air in the metal edge filter device according to an embodiment of the present invention.
3 is a front view of a metal edge filter device according to an embodiment of the present invention.
Figure 4 is a schematic diagram showing a coupling relationship of the scraper according to an embodiment of the present invention.
5 is a cross-sectional view taken along the line 'A'-'A' of FIG.
6 is a block diagram illustrating differential pressure sensing and motor driving according to an embodiment of the present invention.
Figure 7 is a schematic view showing a longitudinal section of the filter cartridge according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of a metal edge filter device (hereinafter, referred to as 'metal edge filter device') for cleaning a filter by detecting a differential pressure according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

Example

1 is a cross-sectional view showing a filtering process of cutting oil in a metal edge filter device according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the flow of air in a metal edge filter device according to an embodiment of the present invention, Figure 3 Front view of a metal edge filter device according to an embodiment of the present invention, Figure 4 is a schematic view showing a coupling relationship of the scraper according to an embodiment of the present invention, Figure 5 is a cross-sectional view 'A'-'A' direction of FIG. 6 is a block diagram illustrating differential pressure sensing and motor driving according to an embodiment of the present invention, and FIG. 7 is a schematic view showing a longitudinal section of the filter cartridge according to an embodiment of the present invention.

As shown in Figures 1 to 3, the metal edge filter device 100 according to an embodiment of the present invention, the cylindrical filter cartridge 300 is installed inside the cylindrical housing 200, the filter cartridge 300 On one side of the) is provided with a scraper 400 to elastically bias the surface of the filter cartridge 300, to remove the foreign matter adhering to the surface of the filter cartridge 300.

In addition, foreign matter is separated from the cutting oil introduced into the housing 200 through the filter cartridge 300, and the separated foreign matter and the cutting oil are discharged to the outside of the housing 200 through separate lines.

Here, the housing 200 is coupled to the upper end of the cylindrical lower housing 210, the first space portion 211 is provided inside, and the lower housing 210, the upper housing for opening and closing the first space portion 211 It may be configured to include a 220, the lower end of the lower housing 210 is preferably formed in a hemispherical form (半球), for the convenience of manufacturing a separate member in the form of a hemisphere, after the cylindrical shape It is preferable to combine the lower housing 210 by welding.

At this time, one side of the upper housing 220 is formed with an inlet 221 through which the cutting oil is introduced, and the other side is formed with an outlet 222 through which the cutting oil from which the foreign matter is removed is discharged, and a foreign material at the center lower end of the lower housing 210. A drain valve 212 for discharging is connected.

Accordingly, the cutting oil introduced into the first space 211 through the inlet 221 is discharged through the outlet 222 through the filtering oil filtered through the filtering process, and the foreign matter removed in the filtering process is a drain valve for discharging foreign substances. It is discharged to the outside of the housing 200 through (212).

The filter cartridge 300 is installed to be rotatable in the first space portion 211 of the lower housing 210, a ring-shaped upper holder 330 is coupled to the upper end of the filter cartridge 300, the upper holder The lower end of the rotary bracket 340 is coupled to the groove of the key structure provided on the upper side of the 330, the upper end of the rotary bracket 340 is coupled to the rotary shaft 223 installed perpendicular to the upper housing 220, When the rotating shaft 223 rotates, the filter cartridge 300 rotates together.

In this case, the filter cartridge 300 is a cylindrical shape having a second space portion 310 provided therein and a plurality of filter holes 320 penetrating through the surface thereof, and preferably made of a metal material such as stainless steel. As shown in FIG. 7, a plurality of rings having a tapered triangular cross-sectional shape narrowly inwardly are connected by at least one or more connecting bars 321 at regular intervals in the vertical direction, so that a gap between the rings is cross-sectional nozzle shape. It is preferable to form the filter hole 320.

In addition, the bottom of the filter cartridge 300 is coupled to the pedestal 350 and is supported by the lower holder 360, the pedestal 350 is for example supported by at least one or more pedestal support shaft 370, such as a bolt screw It is coupled to the upper housing 220, a fine gap is formed between the lower end of the filter cartridge 300 and the pedestal 350, the pedestal 350 can be rotated in a fixed state.

The scraper support shaft 410 is vertically installed at one side of the edge portion of the pedestal 350. At this time, the upper end of the scraper support shaft 410 is coupled to one side of the bottom surface of the upper housing 220, the lower end is coupled to one side of the edge portion of the pedestal 350, the scraper 400 on the outer peripheral surface of the scraper support shaft 410 4 and 5 are coupled to the scraper support shaft 410 by a fastener 430 such as a bolt together with a clamping pad 420 for pressing and supporting the scraper 400.

Here, the scraper support shaft 410 is interposed with at least one tension spring 440, one end to the scraper support shaft 410 to maintain the end of the scraper 400 in contact with the surface of the filter cartridge 300 As a result, the elastic force is continuously applied.

At this time, one end of the tension spring 440 that is interposed on the upper end of the scraper support shaft 410 is coupled to one side of the upper housing 220 and the other end is coupled to the scraper support shaft 410, the scraper support shaft 410 One end of the tension spring 440 interposed at the lower end is coupled to one side of the pedestal 350, the other end is coupled to the scraper support shaft 410, the end of the scraper 400 is elastic to the surface of the filter cartridge 300 An elastic force is applied to the scraper support shaft 410 to bias.

As described above, as the end of the scraper 400 is in contact with the surface of the filter cartridge 300 by the elastic force of the tension spring 440, the scraper 400 when the filter cartridge 300 is rotated The surface of the filter cartridge 300 scratches the surface of the filter cartridge 300. Accordingly, the foreign matter attached to the surface of the filter cartridge 300 and blocking the filter hole 320 is removed by the scraper 400.

Therefore, the rotation of the filter cartridge 300 is preferably made in the tangential direction (for example, counterclockwise in FIG. 5) formed by the scraper 400 and the filter cartridge 300, and the filter cartridge 300 may be rotated. Rotation is achieved by the rotation of the rotary shaft 223 installed in the upper housing 220, the upper end of the rotary shaft 223 is exposed to the upper portion of the upper housing 220, using a tool such as a spanner or wrench, if necessary You can rotate it manually.

Preferably, the upper end of the rotary shaft 223 is connected to the reducer 224, one side of the reducer 224 is provided with a drive motor 225, by the operation of the drive motor 225 filter cartridge 300 Rotation is made.

According to one embodiment of the present invention, the removal of the foreign matter attached to the surface of the filter cartridge 300 may be performed by injecting a high pressure air (air) in the outward direction from the inside of the filter cartridge (300).

To this end, an air inlet 230 through which high pressure air is introduced is provided at one side of the upper housing 220, and the air inlet 230 is an air inlet pipe 231 perpendicular to the first space 211. The air inlet pipe 231 is connected to one side of the air induction pipe 232 installed in the horizontal direction again under the pedestal 350, the second space portion on the other side of the air induction pipe 232 The air injection pipe 233 installed perpendicular to the 310 is connected.

Accordingly, the high pressure air introduced into the air inlet 230 is transferred to the air injection pipe 233 through the air inlet pipe 231 and the air induction pipe 232, and the air injection pipe 233 has a large number in the longitudinal direction. Nozzle hole 234 is formed through, and the high-pressure air is injected to the outside of the filter cartridge 300 through the nozzle hole 234 to remove foreign substances blocking the filter hole 320 on the surface of the filter cartridge 300 It will be removed.

At this time, it is also possible to remove the foreign matter using only one of the scraper 400 and the air injection pipe 233, preferably the scraper 400 and the air injection pipe 233 to improve the efficiency of the foreign matter removal operation. Use together.

To this end, the nozzle hole 234 of the air injection pipe 233 is preferably formed in the end direction of the scraper 400. That is, the scraper 400 scrapes off the foreign matter attached to the surface of the filter cartridge 300, and at the same time, the foreign matter is separated by the high pressure air injected from the nozzle hole 234.

At this time, the rotation of the rotary shaft 223 and the supply of high pressure air for removing the foreign matter is possible manually, preferably by detecting the pressure difference between the first space portion 211 and the second space portion 310 automatically Is performed.

That is, as shown in FIG. 6, a first pressure detection sensor (not shown) is installed at one side of the first space 211, for example, the inlet 221, and the filter cartridge is the second space 310. When the second pressure sensor (not shown) is installed in the inside of the 300, and the pressure difference measured from the first space portion 211 and the second space portion 310 reaches a preset value, the driving motor ( The filter cartridge 300 is cleaned by supplying the high pressure air with the operation of the 225, and the drain valve 212 for discharging the foreign matter is opened so that the removed foreign matter is discharged to the outside.

When the filter hole 320 of the filter cartridge 300 is blocked by foreign matter, the internal pressure of the second space portion 310 is lowered compared to the internal pressure of the first space portion 211. As illustrated in FIG. 3, the operator may check whether the filter cartridge 300 needs to be cleaned of foreign matter through the differential pressure gauge 213 installed at the outside of the housing 200.

Metal edge filter device 100 according to an embodiment of the present invention operates as follows.

First, the cutting oil is introduced into the first space 211 through the inlet 221, and the introduced cutting oil is introduced into the second space part of the filter cartridge 300 through the filter hole 320 of the filter cartridge 300. Into the 310, foreign substances that do not pass through the filter hole 320 fall to the lower portion of the first space 211 by their own weight.

Then, the cutting oil introduced into the filter cartridge 300, the foreign matter is removed, is discharged to the outside of the housing 200 through the outlet 222, the filtration operation of the used cutting oil continues.

When the filtration operation of the used cutting oil as described above is continued for a long time, foreign matter is attached to the surface of the filter cartridge 300 to block the filter hole 320, wherein the pressure difference inside and outside the filter cartridge 300 is detected. The cleaning operation of the filter cartridge 300 is performed.

For the cleaning operation of the filter cartridge 300, the drive motor 225 is operated to rotate the filter cartridge 300 together with the rotating shaft 223, wherein the scraper 400 scratches the surface of the filter cartridge 300 Isolate foreign objects.

In addition, the high-pressure air is injected in the outward direction from the inside of the filter cartridge 300 through the air injection pipe 233, to drop the foreign matter scraped off by the scraper 400, the foreign matter thus separated by its own weight Falling to the lower portion of the first space 211, it is discharged to the outside of the housing 200 with the opening of the drain valve 212 for discharging the foreign matter.

At this time, when the pressure difference inside and outside the filter cartridge 300 falls below a predetermined value by the washing operation of the filter cartridge 300, the operation of the driving motor 225 is stopped and the inflow of air is blocked, and the foreign substance is discharged. The drain valve 212 is closed, and filtration of cutting oil is continued again.

On the other hand, the operator can check whether the filter cartridge 300 is cleaned through the differential pressure gauge 213, if necessary, by removing the foreign matter by the scraper 400 by rotating the rotary shaft 223 using a tool, By supplying air of high pressure, the foreign matter removal operation by the air injection pipe 233 can be performed manually.

100: metal edge filter device
200 housing 210 lower housing
211: first space part 212: drain valve for discharging foreign matter
213: differential pressure gauge 220: upper housing
221: inlet 222: outlet
223 rotation axis 230 air inlet
233: Air spray pipe
300: filter cartridge 310: second space portion
400: scraper 410: scraper support shaft
440: tension spring

Claims (6)

The first space is provided inside, the lower end is connected to the drain valve for the discharge of foreign matter, one side is provided with an inlet for the cutting oil containing foreign matter inlet, the other side is provided with an outlet for the discharge of the cutting oil is removed ;
A cylindrical filter cartridge installed in the first space to be rotatable and having a second space therein and having a plurality of filter holes penetrated therein; And
And a scraper disposed vertically to the outside of the filter cartridge and having an end elastically biased to the surface of the filter cartridge.
The foreign matter on the surface of the filter cartridge is removed by the scraper by sensing the differential pressure generated between the first space portion and the second space portion, thereby rotating the filter cartridge. Metal edge filter unit for cleaning.
The method according to claim 1,
It is installed perpendicular to the inner side of the filter cartridge so as to face the end of the scraper, and further comprises an air injection pipe for removing foreign matter on the surface of the filter cartridge by injecting a high-pressure air supplied from the outside when the filter cartridge is rotated The metal edge filter device for cleaning the filter by detecting the differential pressure.
The method according to claim 1, wherein the housing,
And a cylindrical lower housing formed in the first space portion, and an upper housing coupled to an upper end of the lower housing to open and close the first space portion, wherein the filter cartridge is rotatably rotated in the upper housing. Characterized in that coupled to, the metal edge filter device for cleaning the filter by detecting the differential pressure.
The method according to claim 3,
A rotating shaft is installed at the upper housing, an upper holder is coupled to an upper end of the filter cartridge, and the rotating shaft and the upper holder are coupled by a rotating bracket to rotate the filter cartridge by the rotation of the rotating shaft. Metal edge filter device for washing the filter by detecting the differential pressure.
The method of claim 4,
The lower end of the filter cartridge is supported by a pedestal, the pedestal is coupled to the upper housing by at least one pedestal support shaft, the metal edge filter device for cleaning the filter by detecting the differential pressure.
The method according to claim 5,
A lower end of the scraper support shaft is coupled to one side of the pedestal, an upper end of the scraper support shaft is coupled to one side of the upper housing, the scraper is coupled to one side of the scraper support shaft, at least one torsion spring to the scraper support shaft Is interposed, characterized in that the end of the scraper is elastically biased on the surface of the filter cartridge, the metal edge filter device for detecting the differential pressure to wash the filter.

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