KR101760901B1

KR101760901B1 - Oil mist collecting device with drain filter

Info

Publication number: KR101760901B1
Application number: KR1020150076693A
Authority: KR
Inventors: 윤홍범
Original assignee: (주)와이에이치비; 주식회사 와이에이치비에코
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2017-07-25
Also published as: KR20160141319A

Abstract

The present invention relates to an oil mist cleaner provided with a drain filter and includes a main body having an inlet space for allowing outside air to flow therein and an inlet and an outlet for communicating with the inlet space on both sides, A suction unit for generating a suction force for allowing the outside air to flow into the main body through the suction port; a filter unit installed in the main body to filter the oil mist contained in air introduced into the main body; A cleaning unit installed in the main body and adapted to recover the cutting oil sprayed from the cleaning unit to remove foreign matter contained in the cutting oil, And has a drain filter portion.
The oil mist precipitator provided with the drain filter according to the present invention can periodically clean the impeller and the filter section by the oil splashed from the washing section and recover and reuse the cutting oil, There is an advantage in that the user can save money.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an oil mist collecting device,

The present invention relates to an oil mist cleaner provided with a drain filter, and more particularly, to a cleaner for collecting and filtering oil mist generated during a work using a machine tool such as a CNC lathe or a grinder, And a drain filter for removing foreign matter.

Generally, when machining a metal material by using a machine tool such as a lathe or a milling machine, cutting oil is supplied to a portion cut by a cutting tool or the like. The cutting oil reduces the frictional resistance, decreases the cutting point temperature, Thereby extending the service life of the tool and improving the accuracy of machining.

However, when cutting a metal material rotating at high speed in a machine tool by a cutting tool such as a cutting tool, the cutting oil supplied to the cutting part is scattered in a state of fine particles such as mist due to the high rotational force of the metal material. The oil mist in the mist state scattered in such a manner as described above is extremely harmful to the human body because dust and metal powder are contained therein. Therefore, a device for suppressing the generation of oil mist when cutting a metal material using a machine tool A dust collector for sucking and treating the oil mist has been proposed in Japanese Patent No. 10-0564297.

The dust collector includes an impeller driven by a motor to radially discharge the inhaled air, and an impeller disposed adjacent to the outer periphery of the impeller and impacted by the air discharged from the impeller, Centrifugal force applying means for separating the air primarily separated by the impact plate into heavy air containing oil and light air containing no oil by centrifugal force and centrifugal force applying means for separating the heavy air separated by the centrifugal force applying means And a screen strainer for separating the oil from the air.

However, when the dust collector sucks the air by rotating the impeller by using the power of the motor, the oil mist sucked together with the sucked air is filtered using a plurality of filters to improve the dust collecting efficiency It is necessary to replace the filter in a periodical manner, which causes a relatively large maintenance cost. Further, since there is no means for filtering contaminated washing water when the filter is washed with washing water, the treatment cost for the washing water is increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an impeller provided in a main body and a cleaning unit for spraying a cutting oil to clean the filter unit, The present invention has been made in view of the above problems.

In order to accomplish the above object, according to the present invention, there is provided an oil mist dust collector provided with a drain filter, comprising: a main body having an inlet space for introducing outside air into the inside thereof and having an inlet port and an exhaust port communicating with the inlet space, A suction unit installed in the main body and generating a suction force for allowing the outside air to flow into the main body through the suction port; a filter unit installed in the main body for filtering the oil mist contained in the air introduced into the main body; A cleaning unit installed in the main body, for spraying a coolant into the main body to clean the suction unit and the filter unit; and a cooler installed in the main body to recover the coolant sprayed from the cleaner, And a drain filter portion for filtering foreign substances.

The drain filter unit is connected to the main body by a connection pipe. The drain filter unit includes a filter container having an inlet space therein so that the cutting oil injected from the cleaner unit can be introduced into the filter unit. And a foreign matter filtering unit for filtering the foreign substances contained in the introduced cutting oil.

Wherein the filter container has an inlet formed at an upper portion thereof through which the coolant can be introduced through the connection pipe and a drain port through which the coolant having passed through the foreign matter filtering portion is discharged is formed at a lower portion thereof, A plurality of support plates formed to be spaced apart from each other in the vertical direction and formed to be convex downward and having a through hole for allowing the cutting oil to pass therethrough; A plurality of curved filters that are formed to be convex downwardly corresponding to the support plate and through which the cutting oil has passed and which filter foreign substances contained in the cutting oil; It is desirable to have a gateway.

The filter container has an inlet formed at an upper portion thereof through which the coolant can be introduced through the connection pipe, a drain port through which the coolant having passed through the foreign matter filtering portion is discharged is formed at a lower portion thereof, A drain pipe provided inside the filter container and provided with a drain space communicated with the drain hole and having a communication hole for allowing the coolant to flow into the drain hole on the outer circumferential surface, And a drain filter provided between the inner circumferential surface and the plurality of filter holes to allow the cutting oil to pass therethrough and to filter the foreign substances contained in the cutting oil.

The foreign matter filtering unit further includes an induction plate formed on an upper portion of the drain pipe opposite to the inlet, for guiding the coolant flowing into the filter container through the inlet to the drain filter.

Wherein the guide plate is provided on an upper portion of the drain pipe opposite to the inlet and is formed to have an outer diameter larger than the outer diameter of the drain pipe and to prevent the coolant from flowing into the drain pipe along the lower surface of the fixing member And a skirt member extending downward along an edge of the fixing member.

Preferably, the drain pipe extends a predetermined length in the vertical direction, and the plurality of drain filters are stacked on each other along a direction intersecting the vertical center line of the drain pipe, wherein the drain pipe is formed to be larger in size than the drain pipe Do.

The drain pipe is formed with a communication hole at a lower portion adjacent to the drain hole, and a plurality of the drainage filters are stacked on each other along the vertical direction, and the size of the filter hole is increased as the distance from the communication hole is increased .

The oil mist precipitator provided with the drain filter according to the present invention can periodically clean the impeller and the filter section by the oil splashed from the washing section and recover and reuse the cutting oil, There is an advantage in that the user can save money.

1 is a perspective view of a working box equipped with an oil mist dust collector provided with a drain filter according to an embodiment of the present invention,
FIG. 2 is a cross-sectional view of the oil mist precipitator provided with the drain filter of FIG. 1,
FIG. 3 is an exploded perspective view of the drain filter portion of the oil mist dust collector provided with the drain filter of FIG. 1,
FIG. 4 is a sectional view of the drain filter portion of the oil mist dust collector provided with the drain filter of FIG. 1,
5 is an exploded perspective view of a drain filter portion of an oil mist dust collector provided with a drain filter according to another embodiment of the present invention,
6 is a cross-sectional view of the drain filter unit of FIG. 5,
7 is an exploded perspective view of a drain filter portion of an oil mist dust collector provided with a drain filter according to another embodiment of the present invention,
8 is a sectional view of the drain filter portion of FIG. 7,
9 is an exploded perspective view of a drain filter portion of an oil mist dust collector provided with a drain filter according to another embodiment of the present invention,
10 is a cross-sectional view of the drain filter portion of FIG.

Hereinafter, an oil mist dust collector provided with a drain filter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an oil mist precipitator 100 provided with a drain filter according to the present invention.

Referring to the drawings, an oil mist dust collector provided with a drain filter is installed in a work box 15 provided with an internal space so that a machine tool such as a CNC lathe or a grinder can be installed to perform machining work on the work, (15). When a metallic material rotating at a high speed in a machine tool is cut by a bite or the like, the cutting oil supplied to the cutting portion is scattered in a four-way manner due to the high rotational force of the metal material, such as mist. The oil mist precipitator 100 provided with the drain filter sucks and filters the scattered oil mist.

The oil mist dust collector provided with the drain filter according to the present invention is provided with an inlet space 211 for allowing the oil mist to flow therein and has an inlet 221 and an outlet 231 communicating with the inlet space 211 on both sides, A suction unit 300 installed inside the main body 200 and generating a suction force to allow the air in the operation box 15 to flow into the main body 200; A filter unit 400 installed in the main body 200 for filtering the oil mist contained in the air introduced into the main body 200 and a filter unit 400 installed in the main body 200 to clean the suction unit 300 and the filter unit 400 And a drain filter unit installed in the main body and adapted to recover the cutting oil sprayed from the cleaning unit to filter out foreign substances contained in the cutting oil, Respectively.

The main body 200 includes a main body 210 having an inflow space 211 therein, a front cover 220 coupled to a front portion of the main body 210, And a rear cover 230 coupled thereto.

The main body 210 is provided with an inflow space 211 therein and is formed into a cylindrical shape extending in the front-rear direction. The main body 210 is respectively opened on the front and rear sides, and a drain pipe (not shown) for discharging the cutting oil sprayed from the cleaning part 500 to the outside is installed in the lower part.

A bracket 212 is provided on a lower surface of the main body 210 so as to be fixed to a frame adjacent to the operation box 15. The bracket 212 extends downward with respect to the main body 210 and a flange portion 213 is provided at a lower end of the bracket 212 so as to be bolted to the frame. The flange portion 213 is formed with a plurality of through holes so that the fixing bolts can be inserted into the frame through the fixing bolts.

In the illustrated example, the main body 210 is formed in a cylindrical shape. However, the main body 210 is not limited to the illustrated example, but may be formed in a rectangular shape.

The front cover 220 is fixed to the front end of the main body 210 so as to close the open front of the main body 210. The suction port 221 is formed at the center of the front cover 220 so that air in the working box 15 can be introduced. At this time, the front lid 220 is connected to the other end of the supply hose 222, one end of which is connected to the operation box 15, and the supply hose 222 is installed so as to communicate with the suction port 221.

The front lid 220 is formed with a plurality of through holes spaced apart from each other along the circumferential direction so that the coupling bolt can penetrate and be fastened to the main body 210. An auxiliary filter 223 is installed on the rear surface of the front lid 220 to cover the suction port 221. The auxiliary filter 223 is firstly filtered by the oil mist contained in the air introduced through the supply hose 222. [

The rear lid 230 is fixed to the rear end of the main body 210 so as to close the open rear face of the main body 210. [ An exhaust port 231 is formed at the center of the rear lid 230 so that air passing through the main body 210 can be discharged to the outside. At this time, an exhaust pipe 232 communicating with the exhaust port 231 is provided on the rear surface of the rear lid 230. The rear lid 230 is formed with a plurality of through holes spaced apart from each other along the circumferential direction so that the coupling bolts can penetrate and be fastened to the main body 210.

The suction unit 300 includes a fixed plate 310 fixed in the main body 210, an impeller 320 rotatably supported on the front surface of the fixed plate 310, A driving motor 330 mounted on a rotating shaft of the impeller 320 for rotating the impeller 320 and a receiving space 341 for receiving the driving motor 330, And a communication pipe 340 fixed to a rear surface of the main body 310.

The fixing plate 310 is formed to have an outer diameter corresponding to the inner diameter of the main body 210 and has an edge fixed to the inner surface of the main body 210. The fixing plate 310 is formed with a plurality of through holes 311 through which the air introduced into the main body 210 can pass through the air inlet 221. An impeller 320 is rotatably installed at the center of the fixing plate 310.

The driving motor 330 is fixed to the rear surface of the fixing plate 310 and is connected to the rotating shaft of the impeller 320. The driving motor 330 is connected to the suction port 221 through the suction port 221, The impeller 320 is rotated.

The communicating tube 340 is provided with a lead-in space 341 therein, and is formed into a cylindrical shape extending in a longitudinal direction by a predetermined length. The front end of the communicating tube 340 is fixed to the rear surface of the fixing plate 310 and the other end is fixed to the rear lid 230 so as to communicate with the exhaust port 231. A plurality of communication holes 342 are formed on the outer circumferential surface of the communicating tube 340 so that air flowing backward due to the rotation of the impeller 320 can be introduced into the inlet space 341.

The suction unit 300 further includes an operation lamp 350 installed on an outer surface of the main body 210 to inform the operating state of the suction unit 300. The operation lamp 350 is interlocked with the drive motor 330 to emit light when the drive motor 330 is operated, and is turned off when the drive motor 330 stops. The operator can easily determine the operation state of the suction unit 300 by the operation lamp 350.

The filter unit 400 includes a first filter 401 configured to surround the outer circumferential surface of the front end of the communicating tube 340 and a second filter 402 configured to surround the outer circumferential surface of the rear side communicating tube 340 of the first filter 401 . The first and second filters 401 and 402 are preferably formed of a porous material so that the air introduced into the main body 210 through the suction port 221 is passed through and the oil mist and foreign substances contained in the air can be filtered .

The cleaning unit 500 is installed inside the main body 200 and includes an injection nozzle 510 having a spray hole for spraying the cutting oil at an end thereof and a spray nozzle 510 connected to the spray nozzle 510, And a coolant supply member 520 for supplying coolant.

The injection nozzle 510 is installed at the rear end of the front cover 220 by a support rod (not shown). The injection nozzle 510 is supported so as to be spaced forward from the impeller 320 with respect to the air flow direction in the main body 200 and has a spray hole for spraying coolant on the rear surface of the impeller 320 opposite to the impeller 320 have. At this time, one end of the support rod is fixed to the inner surface of the front cover 220, and protrudes toward the center of the front cover 220, and the injection nozzle 510 is fixed to the other end.

The cutting oil supply member 520 includes a housing accommodating tank 521 in which a cutting oil is accommodated and one end connected to the accommodating tank 521 and the other end connected to the injection nozzle 510 through the front lid 220 And a supply pump 523 installed in the supply pipe 522 and for pumping the coolant stored in the storage tank 521 to the injection nozzle 510.

The drain filter unit 600 is connected to the main body 200 by a connection pipe 605 and an inflow space 613 is formed therein so that the cutting oil sprayed from the cleaning unit 500 can be introduced And a foreign matter filtering unit 620 installed inside the filter container 610 for filtering foreign substances contained in the cutting oil flowing into the inflow space 613. The filter casing 610 is provided with a filter casing 610,

The container 610 includes a container body 611 having an inlet space 613 formed therein and an upper surface thereof opened and a container cover 612 coupled to the container body 611 by an engaging portion 616. [ Respectively.

The container body 611 is formed into a cylindrical shape having a predetermined outer diameter, and is formed to extend in the vertical direction by a predetermined length. A drain port is formed at the center of the lower surface of the container body 611 so that the cutting oil flowing into the inlet space 613 can be discharged to the outside. At this time, the container body 611 is provided with a discharge pipe 614 to communicate with the drain hole.

The container lid 612 is formed to cover the upper surface of the container body 611 and has an inlet port connected to the connection pipe 605 at a central portion of the upper surface thereof. One end of the connection pipe 605 is connected to the main body 200 and the other end of the connection pipe 605 is connected to the inlet of the container cover 612.

The engaging portion 616 includes a plurality of hooks 616 spaced apart from each other along the circumferential direction on the outer circumferential surface of the container lid 612 and a plurality of hooks 616 pivotally mounted on the outer circumferential surface of the container body 611, And an engaging member 618 provided as far as possible.

The lower end of the latching member 618 is rotatably coupled to the container body 611 and the upper end of the latching member 618 is engaged with the hooking groove 616 so as to be hooked onto the hooking hook 616 when rotating in a direction adjacent to the container lid 612 (Not shown). A gripping member is formed at the lower end of the engaging member 618 so that the operator can grasp the engaging member 618 to rotate the engaging member 618. The gripping member extends downward with respect to the engaging member 618 and is inclined to be away from the container body 611 toward the downward direction.

Although not shown in the figure, the hinge pin of the latching member 618 is provided with a latching member 618 which provides an elastic force to the latching member 618 so that the upper end of the latching member 618 is rotated in the direction adjacent to the outer peripheral surface of the container lid 612 Spring is installed.

The foreign matter filtering unit 620 is disposed in the filter container 610 so as to be vertically spaced apart from each other and convex downward and includes a plurality of support plates 621 having a through hole 624 through which the cutting oil can pass, And a support plate 621 which is provided in the space between the support plates 621 so as to be supported by the support plate 621 and is formed to be convex downwardly corresponding to the support plate 621, A plurality of curved filters 622 through which the cutting oil is passed to filter out foreign substances contained in the cutting oil and a filter fixing part 623 for fixing the curved filter 622 to the support plate 621.

The support plate 621 has a predetermined thickness and is formed to have an outer diameter corresponding to the inner diameter of the container body 611. The center of the support plate 621 is convex downward and a through hole 625 is formed in the center of the support plate 621 so that the fixing bolt 626 of the filter fixing part 623, which will be described later, can pass through. Four through holes 624 are formed in the support plate 621. The through holes 624 are formed in arc shapes having a predetermined curvature around the through holes 625. [ At this time, it is preferable that the through-holes 624 are formed to be radially positioned around the through-hole 625.

Three support plates 621 constructed as described above are arranged in the interior of the container body 611 so as to be spaced apart from each other in the vertical direction and welded to the inner wall surface of the container body 611 at the edges.

The curved filter 622 is formed of a porous material having a plurality of filtration holes to allow the cutting oil to pass therethrough and to filter out foreign matter contained in the cutting oil. The curved filter 622 is formed to be convex downward corresponding to the support plate 621. A plurality of curvature filters 622 are arranged between the support plates 621 in the vertical direction. At this time, it is preferable that a curved filter 622 having a small size of the filter hole is provided to the lower side so that the cutting oil can be easily drained downward.

The filter fixing portion 623 includes a fixing bolt 626 penetrating through the through hole 625 of the supporting plate 621 and the bending filter 622 and a fixing nut 627 fastened to the end of the fixing bolt 626. [ Respectively. At this time, the fixing nut 627 is welded and fixed to the support plate 621 provided at the lowermost side.

Since the support plate 621 and the curved filter 622 are formed downwardly convexly as described above, a space is provided between the ceiling surface of the container cover 612 and the center of the curved filter 622, The inlet port is prevented from being closed and the cutting oil introduced into the container body 611 through the inlet is guided to the center of the curved filter 622 and flows out between the edge of the curved filter 622 and the inner wall of the container body 611 .

5 and 6 illustrate a drain filter unit 700 according to another embodiment of the present invention.

Elements having the same functions as those in the previous drawings are denoted by the same reference numerals.

The drain filter unit 700 is connected to the main body 200 by a connection pipe 605 and is connected to the inflow space 500 so that the cutting oil sprayed from the cleaning unit 500 can be introduced. And a foreign matter filtering unit 720 installed in the filter container 710 and filtering the foreign substances contained in the cutting oil introduced into the inflow space 713. The filter 710 includes a filter 710,

The container 710 includes a container body 711 having an inlet space 713 formed therein and an upper surface thereof opened and a container cover 712 coupled to the container body 711 by a coupling portion 616. [ Respectively. The container body 711 has the same configuration as that of the container body 611 of the embodiment shown in FIG. 2, and a detailed description thereof will be omitted.

The container lid 712 is formed with an insertion groove 715 which is drawn upward when the upper end of the container body 711 can be drawn inward. The container lid 712 is formed with an inlet port through which the connection pipe 605 is connected to the center of the upper surface. The container lid 712 has a limiting member 717 formed on the inner wall surface thereof so as to restrict the entry depth of the container body 711.

The limiting member 717 includes a first limiting plate 718 protruding toward the center of the container lid 712 on the inner wall surface of the container lid 712 at a position spaced upward from the lower end of the container lid 712, 1 limiting plate 718. The second limiting plate 719 extends downward at the end of the first limiting plate 718. [ The first limiting plate 718 is formed to extend along the circumferential direction on the inner wall surface of the container cover 712. At this time, the first restriction plate 718 is preferably formed at a position spaced downward from the inlet.

The upper end portion of the container body 711 that is drawn into the container lid 712 comes into contact with the lower surface of the first limiting plate 718 to restrict the entry thereof so that the foreign substance filtering portion 720 installed therein prevents the inlet port from being closed do.

The foreign matter filtering section 720 is installed in the filter container 710 so as to cover the drain port and has a drainage space 726 communicated with the drainage port. A drain pipe 721 provided with a communication hole 727 for allowing the coolant to flow into the drain pipe 721 and an outer circumferential surface of the drain pipe 721 and the inner circumferential surface of the filter container 710, The first to third drainage filters 722, 723 and 724 having a plurality of filtration holes formed therein to allow the filter to be filtered and the drainage pipe 721 facing the inlet to be introduced into the filter vessel 710 through the inlet And an induction plate 725 for guiding the coolant to the drain filter.

The drain pipe 721 extends upward from the bottom surface of the container body 711 formed with the drain hole by a predetermined length and is formed into a cylindrical shape having a predetermined inner diameter. A plurality of communication holes 727 are formed on the outer circumferential surface of the drain pipe 721. The communication holes 727 are formed by extending a predetermined length in the vertical direction.

The first drainage filter 722 has a first hollow 731 having an inner diameter corresponding to the outer diameter of the drainage pipe 721 so that the drainage pipe 721 can be inserted therein, And extends in the vertical direction with a corresponding length. The first drainage filter 722 is formed of a porous material so that a plurality of filtration holes can be formed.

The second drainage filter 723 is formed with a second hollow 732 having an inner diameter corresponding to the outer diameter of the first drainage filter 722 so that the first drainage filter 722 can be inserted therein, And extends in the vertical direction with a length corresponding to the vertical length of the filter 722. The second drainage filter 723 may be formed of a porous material having a larger size than that of the first drainage filter 722.

The third drainage filter 724 is formed with a third hollow 733 having an inner diameter corresponding to the outer diameter of the second drainage filter 723 so that the second drainage filter 723 can be inserted therein, And extends in the vertical direction with a length corresponding to the vertical length of the filter 723. The second drainage filter 723 of the third drainage filter 724 may be formed of a porous material having a larger size than the filtration holes of the second drainage filter 723.

The induction plate 725 is formed at the upper end of the drain pipe 721 opposed to the inlet of the container cover 712 and is connected to the drain pipe 721 to guide the cutting oil injected from the inlet to the first to third drain filters 722, Which has an outer diameter larger than the outer diameter of the disk.

The first to third drain filters 722, 723, and 724 configured as described above are stacked on each other along the direction crossing the center line of the drain pipe 721 in the vertical direction. As the distance from the drain pipe 721 increases, And the drainage of the cutting oil can be smoothly performed. Particularly, since the cutting oil is guided to the first to third drain filters 722, 723, and 724 by the guide plate 725, the cutting oil that has not passed through the filter and the outer peripheral surface of the drain pipe 721 flows into the drain pipe 721 .

7 and 8 illustrate a container lid 751 and a container body 754 according to another embodiment of the present invention.

Referring to the drawing, the container lid 751 is formed with an insertion groove 715 which is drawn upward when the upper end of the container body 754 can be drawn inward. The container lid 751 is formed with an inlet port through which the connection pipe 605 is connected to the center of the upper surface. The container lid 751 has a step 755 formed on its inner wall surface so as to limit the depth of entry of the container body 754. The step 755 is formed so as to protrude toward the center of the container lid 751 at a position spaced upward from the lower edge of the container lid 751. At this time, it is preferable that the step 755 is formed at a position spaced downward with respect to the inlet.

The upper portion of the container body 754 that is drawn into the container cover 751 is prevented from interfering with the step 755 so that the foreign substance filtering portion 720 installed therein prevents the inlet from being closed.

An auxiliary port 753 having a larger area than the communication port 727 is formed at the lower end portion of the drain pipe 752 adjacent to the drain port of the container body 754. The container body 754 is provided below the inner side surface And the auxiliary hole 753 is formed so that the inner diameter of the auxiliary hole 753 decreases as it approaches the drain hole so as to provide an inclined surface for guiding the cutting oil.

9 and 10 illustrate a foreign matter filtering unit 800 according to another embodiment of the present invention.

Referring to the drawing, a foreign matter filtering unit 800 is installed inside the filter container 710 so as to cover the drain hole, and a drainage space 811 communicating with the drainage hole is provided therein, A drain pipe 810 provided with a communication hole 812 for allowing the cutting oil to flow into the drain pipe 811 and an inner circumferential surface of the filter container 710, A plurality of fourth drainage filters 820 formed with a plurality of filtration holes for filtering foreign substances contained in the cutting oil and a plurality of second drainage filters 820 formed on the drainage pipe 810 opposite to the inlet and connected to the filter vessel 710 through the inlet, And an induction plate 830 for guiding the cutting oil flowing into the inside thereof toward the drain filter.

The drain pipe 810 extends upward from the bottom surface of the container body 754 formed with the drain hole by a predetermined length and is formed into a cylindrical shape having a predetermined inner diameter. The communication hole 812 is formed in the outer peripheral surface of the lower end of the drain pipe 810 adjacent to the drain hole of the container body 754.

The fourth drainage filter 820 is formed in a disc shape having an outer diameter corresponding to the inner diameter of the container body 754 and has an inner diameter corresponding to the outer diameter of the drainage pipe 810 so that the drainage pipe 810 can be inserted And a fourth hollow 821 is formed. The fourth drainage filter 820 may be formed of a porous material to form the filter hole.

At this time, a plurality of the fourth drainage filters 820 are arranged along the vertical direction between the support plates 621. At this time, it is preferable that a fourth drainage filter 820 having a smaller size of the filter hole is installed toward the lower side so that the cutting oil can be easily drained downward.

The guide plate 830 is installed on the drain pipe 810 facing the inlet and has a fixing member 831 formed to have an outer diameter larger than the outer diameter of the drain pipe 810, And a skirt member 832 extending downward along the edge of the fixing member 831 so as to prevent the water from flowing into the drain pipe 810 along the lower surface of the fixing member 831. The skirt member 832 preferably extends in the circumferential direction along the edge of the fixing member 831.

The cutting oil flowing through the inlet port is guided to the side of the fourth drainage filter 820 through the fixing member 831 and the skirt member 832 so that the cutting oil flowing through the filter and the outer peripheral surface of the drain pipe 810, Is prevented from flowing into the drain pipe (810).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: Oil mist dust collector
200:
210: Main body
220: front cover
222: Supply hose
230: rear cover
300:
310: Fixed plate
320: Impeller
330: drive motor
340: communicator
400:
401: first filter
402: second filter
500: Cleaning section
510: injection nozzle
520: Coolant supply member
521: Storage tank
522: Supply pipe
523: Feed pump
600: drain filter portion

Claims

A main body having an inflow space for allowing outside air to flow therein and having an inlet and an outlet for communicating with the inflow space on both sides;
A suction unit installed in the main body and generating a suction force for allowing the outside air to flow into the main body through the suction port;
A filter unit installed inside the main body and filtering the oil mist contained in the air flowing into the main body;
A cleaning unit installed in the main body and spraying a coolant into the main body to clean the suction unit and the filter unit;
And a drain filter unit installed in the main body for recovering the cutting oil sprayed from the cleaning unit to filter out foreign substances contained in the cutting oil,
The drain filter section
A filter container connected to the main body by a connection pipe and having an inflow space therein so that the cutting oil injected from the cleaning part can be introduced,
And a foreign matter filtering unit installed in the filter container to filter foreign substances contained in the cutting oil flowing into the inflow space,
The filter vessel
An inlet port through which the coolant can be introduced through the connection pipe is formed at an upper portion thereof and a drain port through which the coolant having passed through the foreign matter filtering portion is discharged is formed at a lower portion thereof,
The foreign matter filtering unit
A plurality of support plates spaced apart from each other in a vertical direction inside the filter container and formed to be convex downwardly and having a through hole for allowing the cutting oil to pass therethrough;
The support plate being provided in a space between the support plates so as to be supported by the support plate and being formed to be convex downwardly corresponding to the support plate, the coolant having passed through the pass hole is passed, and foreign matter contained in the coolant is filtered A plurality of curvature filters,
And a filter fixing unit for fixing the curved filter to the support plate.

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