KR101250303B1 - Filtration unit of centrifuge - Google Patents

Abstract

PURPOSE: A centrifugal filtering apparatus is provided to improve convenience for use and efficiency for purification with cleaning water by conveniently and quickly attaching and detaching a cover, and to allow a worker to require no extra fastening tools by integrating a handle with a handle fixing device. CONSTITUTION: A centrifugal filtering apparatus comprises an actuating unit(10) providing a rotational force; an outer container(20) placed at the upper side of the actuating unit; an inner container(30); a cover(40); and a handle fixing device(50). The bottom center of the outer container is directly connected to the rotary shaft of the actuating unit. A stepped groove is formed on the top border portion of the outer container. The inner container is detachably coupled inside the outer container. The cover has a feeding path for liquid to be purified, and a purified water outlet(43). The cover is detachably coupled to the outer container. The handle fixing devices are circumferentially installed on the top of the cover at certain intervals so that the cover can be selectively detached. The handle fixing devices are selectively fixed on the top border of the stepped groove depending on the rotation of handle parts.

Description

Filtration unit of centrifuge

The present invention relates to a centrifugal filtration apparatus, and more particularly, to remove foreign substances from contaminants, to separate clean water separately, and to recycle them, and to easily open and close the cover when cleaning sludge of the outer cylinder, thereby improving the convenience of use. It relates to a type filtration device.

In general, among the liquid materials used in daily life, for example, processing liquids used in various machine tools, semiconductor-related processing equipment, other hydraulic fluids, and freezer oils, foreign substances such as metal powder, rust, sand, sludge and seal debris are mixed. It is. Such mixtures are called contaminants.

Therefore, in order to recycle the contaminants as described above, the contaminants containing the foreign substances in the process of use are passed through a filtering device equipped with a fine filtering network to filter the foreign substances or rotated in a centrifuge so that the foreign substances and the purified water can be recycled by centrifugation. It was.

On the other hand, Figure 1 is a cross-sectional view showing a conventional centrifugal filtration device. As shown in FIG. 1, in order to separate clean purified water by rotating and centrifuging contaminants containing foreign substances, a conventional centrifugal filtration device includes a driving means 1 for providing rotational force and a central portion of the driving means 1. An outer cylinder 2 rotatably connected to a rotating shaft of the inner cylinder 2, an inner cylinder 3 detachably fitted to an inner side of the outer cylinder 2, and a cover detachably provided on an upper portion of the outer cylinder 2 ( 4) is made, including.

At this time, the conventional centrifugal filtration device is generally fixed to the cover 4 is fastened by bolts on the outer cylinder (2), this bolt fastening method had the following problems.

First, when using a conventional centrifugal filtration device, the operator takes unnecessary time to tighten and loosen the bolt in the process of repeating the assembly after removing the cover for internal cleaning, etc. There was a problem that occurred.

Second, in order to fasten or detach the outer cylinder and the cover, a separate tool is required to assemble the bolt. If such a tool is not prepared in advance or the separated bolt is lost, the centrifugal filter cannot be used. Utilization is significantly lowered.

Third, some leakage occurs while the outer cylinder and the cover are fastened when the contaminants containing the foreign substances are rotated, and foreign matter adheres to the fastening portion and the bolt and causes rust, which causes the outer cylinder cover. There was a problem in that the fastening property of was significantly reduced and the centrifugal filtration device could not be used.

Registered Room No. 20-03649040000 (2004.10.05)

In order to solve the above problems, the present invention is to remove the foreign matter from the contaminants to separate the clean water separately and recycle it, and also to facilitate the opening and closing of the cover when cleaning the sludge of the outer cylinder centrifugal filtration device with improved ease of use The challenge is to provide.

In order to solve the above problems, the present invention provides a drive means for providing a rotational force; An outer cylinder disposed on an upper side of the driving means, the lower center of which is directly connected to the rotating shaft of the driving means, and having a stepped groove formed on an upper edge thereof; An inner cylinder detachably coupled to an inner side of the outer cylinder; A cover formed to purify the liquid supply path and the purge water discharge path and provided to be detachable from the outer cylinder; And a handle fixing device which is provided with a plurality of spaced apart in the circumferential direction at the upper end of the cover so that the cover is selectively detached and is selectively restrained and fixed to the upper edge of the stepped groove according to the rotation operation. do.

Here, the handle fixing device is a handle that is formed extending in the longitudinal direction of the guide shaft to the lower side, the rotating bush is inserted into the coupling hole formed in the rim portion of the cover, the hollow portion is inserted into the guide shaft, and the guide It is fixed to the end of the shaft, it is preferable to include a cover stopper which is formed to extend in both sides to be selectively restrained in the stepped groove in accordance with the rotation operation of the handle portion provided with a restraining protrusion formed with a gradient slide on the upper surface.
In addition, it is preferable that a pair of stoppers are disposed on the upper edge of the stepped groove so as to face each other, and the constraining protrusion is interposed between the stoppers and selectively constrained to the bottom surface of the stopper.

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On the other hand, a holding spring having a locking groove formed in the center portion is coupled to the upper portion of the guide shaft, and the locking groove is coupled to the upper surface portion of the cover fixing device so that a variable range of the rotation angle of the handle fixing device is constrained. Preferably, a pair of first locking projections is provided.

In addition, the stopper protrusion protrudes on one side of the lower surface of the handle portion, and a pair of second catching protrusions are provided on the upper surface portion of the cover to limit a variable range of the rotation angle of the handle fixing device.

Through the above solution, the centrifugal filtration device of the present invention provides the following effects.

First, the cover may be securely sealed in close contact with the upper end of the inner cylinder just by being limited to or removed from the inside of the stepped groove by rotating the handle part to the outside or the inside, and conveniently and quickly the cover. Because of the desorption, the ease of use can be significantly increased, and the efficiency of the washing water purification operation can be significantly improved.

Second, since the handle fixing device is integrally provided with the handle part, a separate fastening tool is not required, and the cover can be easily detached by a simple operation of rotating the handle part, thereby increasing the ease of use. .

Third, in limiting the rotation radius of the handle fixing device is limited to a simple structure in which the holding spring and the stopper projection is selectively locked, the operation can be easily used by the user.

1 is a cross-sectional view showing the entire internal structure of the centrifugal filtration device according to the prior art.
Figure 2 is a cross-sectional view showing a centrifugal filtration device according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing the outer cylinder, the inner cylinder, the cover and the handle fixing device according to an embodiment of the present invention.
Figure 4a and 4b is an exploded perspective view showing a coupling state of the handle fixing device and step grooves in accordance with an embodiment of the present invention.
Figure 5 is a partial perspective view showing a state in which the handle fixing device is rotated according to an embodiment of the present invention.
Figures 6a and 7b is a front view and a partial cross-sectional view showing a detached state of the cover according to the rotation of the handle fixing device in part "A" of FIG.
8 is a plan view showing a state that the handle fixing device is restrained in accordance with an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the centrifugal filtration apparatus according to a preferred embodiment of the present invention.

Figure 2 is a cross-sectional view showing a centrifugal filtration apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the centrifugal filtration apparatus 100 according to the present invention includes a driving means 10, an outer cylinder 20, an inner cylinder 30, a cover 40, and a handle fixing device 50. It is done by

Here, the outer cylinder 20 and the inner cylinder 30 is made of a cylindrical case shape. The inner cylinder 30 is open at an upper portion thereof, and is provided with a washing space in which a liquid to be purified, such as cutting oil containing foreign matter, is stored and rotated by centrifugal force. In addition, the material of the inner cylinder 30 may be made of synthetic resin or NBR rubber material with excellent durability.

At this time, the inner cylinder 30 is coupled to the outer cylinder 20 in a fitting manner and after the filtration process is completed, the inner cylinder 30 is in close contact with the inner cylinder 20 to prevent separation of the inner cylinder 30. More preferably, a plurality of protrusions (not shown) are formed on the wall surface of the substrate.

On the other hand, a plurality of impellers 44 are attached to the lower surface of the cover 40 to facilitate the centrifugation of the liquid to be purified and the foreign matter inside the washing space portion of the inner cylinder 30. Here, the impeller 44 has an elastic force, preferably made of a material that can promote the stirring action of the liquid to be purified when the outer cylinder 20 and the inner cylinder 30 rotate. At this time, the impeller 44 may be formed with an uneven portion to further promote the stirring action of the liquid to be purified.

In addition, a mold fitting fixing part 33 may be formed on a bottom surface of the inner tube 30, and the mold fitting fixing part 33 is inserted into a mold hole 24 formed in the lower part of the outer tube 20 to drive the means. To overcome the inertia during the initial rotation by the (10) to allow the inner cylinder 30 and the outer cylinder 20 can be rotated in a sense of unity. At this time, if necessary, the drainage hole penetrating the mold fixing part 33 may be formed so that the remaining liquid is discharged to the lower part after the filtration operation is completed.

On the other hand, the outer cylinder 20 is open at the top, the inner cylinder 30 is inserted detachably. Here, the outer cylinder 20 is a rigid body (rigid body) is preferably made of a metal material such as aluminum, such as excellent corrosion resistance and durability so as not to be corroded by moisture or the like.

In addition, the lower center portion of the outer cylinder 20 is directly connected by the power transmission unit and the rotating shaft of the drive means 10, such as an electric motor for providing a rotational force. At this time, the power transmission unit is preferably coupled to the lower portion of the outer cylinder 20 by key coupling to screw coupling. In this case, the driving means 10 is connected to the lower side of the outer cylinder 20 vertically connected to provide a rotational force in either direction.

And, although not shown in the drawings, the drive of the rotary shaft is connected to an electrical supply device installed in the centrifugal filter 100 may be operated in a conventional manner by the operation of a switch or a timer. Since such electrical control method can be easily implemented by those skilled in the art, more detailed description thereof will be omitted.

In addition, an upper side of the outer cylinder 20 is provided with a purifying liquid supply path 42 into which the purifying liquid flows, and a purifying water discharge passage 43 through which the purifying liquid from which foreign substances have been removed is disposed, and an upper portion thereof is opened. The cover 40 is detachably coupled to the upper surface of the outer cylinder 20. Here, the cover 40 and the outer cylinder 20 is detachable by the fastening means.

Thus, when the centrifugal filtration device 100 is driven, the outer cylinder 20 and the inner cylinder 30 are rotated together, and the foreign matter in the liquid to be stored in the inner cylinder 30 is stored in the inner cylinder by centrifugal force. (30) The purified liquid which is in close contact with the inner wall surface and the foreign matter is separated may be discharged through the purified water discharge path 43 and recycled. In addition, the inner cylinder 30, the inner wall surface in close contact with the centrifuged foreign matter can also be easily removed.

On the other hand, the cover 40 is fastened to the upper portion of the outer cylinder 20 into which the inner cylinder 30 is inserted, and is generally coupled by a bolt fastening, such coupling to repeatedly open and close the cover 40. Becomes difficult. The reason is that it takes unnecessary time to tighten and loosen the bolts in the process of repeating the assembly after removing the cover 40, and the tool for fastening the bolts is not required separately, the outer cylinder in the filtration process ( This is because some leakage occurs between the cover 20 and the cover 40, such that foreign matters adhere to the fastening portion and the bolt and rust occurs.

For this reason, it takes a lot of time in the process of opening and closing the cover 40, the cover 40 is not properly coupled due to the leakage of the liquid in the inner cylinder due to the rotational force such that the centrifugal filtration device 100 There is a risk of damage.

The cover 40 applied in the present invention provides a structure to solve this problem.

Figure 3 is an exploded perspective view showing the outer cylinder, the inner cylinder, the cover and the handle fixing device according to an embodiment of the present invention, Figures 4a and 4b is a coupling state of the handle fixing device and step grooves in accordance with an embodiment of the present invention An exploded perspective view shown.

As shown in FIGS. 3 to 4B, the inner cylinder 30 is inserted into and connected to the outer cylinder 20, and the impeller 44 positioned inside the inner cylinder 30 is connected to a lower portion thereof. The cover 40 is detachably connected.

Here, the cover 40 is preferably provided with a handle fixing device (50). In detail, the handle fixing device 50 is coupled to a plurality of coupling holes 41 formed along the circumferential direction of the upper edge portion of the cover 40, the handle portion 51, the rotating bush 53, and the cover stopper And 54.

Referring to FIG. 4A, a guide shaft 52 extending in the longitudinal direction may be formed on one lower surface of the handle part 51. In addition, the guide bush 52 is provided with a rotary bush 53 formed with a hollow portion to insert, the rotary bush 53 is fixed to the coupling hole 41 formed in the cover 40. In this case, as the handle part 51 is selectively rotated, the handle fixing device 50 may be rotated by the guide shaft 52 being rotated inside the rotating bush 53.

Here, the guide shaft 52 is inserted into the hollow formed in the rotary bush 53 is penetrated through, it is preferable that the end is formed so as to be exposed to the outside. The cover stopper 54 is preferably coupled to an end of the guide shaft 52 exposed to the outside. At this time, the cover stopper 54 may be bolted to the end of the guide shaft 52, or may be coupled by a fastening method such as key coupling or screw coupling in some cases.

On the other hand, the cover stopper 54 is fixed to the end of the guide shaft 52 is interlocked and rotated in accordance with the rotation operation of the handle portion 51, the stepped groove formed on the upper edge portion of the outer cylinder 20 It is more preferable to be provided in 21.

In detail, the stepped groove 21 is preferably formed at an upper edge portion of the outer cylinder 20 at a position opposite to the position at which the handle fixing device 50 is provided. Referring to FIG. 4B, the stepped groove 21 is preferably provided with a pair of stoppers 22 on both stepped upper portions of the groove formed to insert the restriction protrusion 55 therein. The cover stopper 54 is provided inside the stepped groove 21 formed as described above, so that the cover stopper is selectively constrained to the stepped groove 21 according to the rotation operation of the handle part 51. 54 is formed extending to both sides, it is more preferable that the restraint protrusion 55 is formed with a slide portion (55a) formed to be gradient on the upper surface.

That is, the cover stopper 54 is connected to the guide shaft 52 and interlocked according to a rotation operation so that the cover stopper 54 is constrained to the lower surface edge 22a of the protrusion of the stopper 22 provided in the stepped groove 21 when rotating. The protrusion 55 may be selectively constrained to fix the cover 40 to the outer cylinder 20.

In detail, the slide portion 55a of the restraint protrusion 55 formed on the cover stopper 54 has an upper edge surface of the stepped groove 21, that is, the stopper according to the rotation operation of the handle portion 51. The lower surface of the protrusion 22 may be fixed to the edge by being in close contact with the edge 22a and selectively sliding. At this time, the stopper 22 is more preferably so that one side thereof protrudes to the inside of the stepped groove 21 so that the restraining protrusion (55) can be restrained.

Here, the stepped groove 21 may be fixed to the stopper 22 is provided separately as shown in the drawing or may be integrally formed by cutting the upper edge portion of the outer cylinder 20 in some cases.

The handle fixing device 50 formed as described above does not require a separate fastening tool because the handle part 51 is integrally provided, and the cover (s) by a simple operation of rotating the handle part 51. 40) can be easily removed, so the ease of use can be significantly increased.

On the other hand, Figure 5 is a partial perspective view showing a state in which the handle fixing device is rotated according to an embodiment of the present invention, Figures 6a and 7b is a removable cover of the cover according to the rotation of the handle fixing device in part "A" of FIG. It is the front view and partial sectional drawing which showed the state.

5 to 7b, the handle fixing device 50 is connected to be selectively rotated to the coupling hole 41 formed in the upper edge portion of the cover 40. At this time, the handle fixing device 50 is formed with the handle portion 51 which is formed in the guide shaft 52 extending in the longitudinal direction to the lower side, the rotating bush having a hollow portion so that the guide shaft 52 penetrates 53 is connected, it is preferably inserted into the coupling groove 41 formed in the cover 40 is connected.

In addition, the cover stopper 54 is connected to an end of the guide shaft 52 connected through the inside of the rotary bush 53, and the cover stopper 54 is rotated as the handle 51 is rotated. Can rotate in conjunction.

At this time, it is preferable that the cover stopper 54 is formed with the constraining protrusion 55 extending in both sides to be selectively constrained to the stepped groove 21 formed in the upper edge portion of the outer cylinder 20.

Here, the slide portion (55a) is formed in the restraint protrusion (55) formed in the cover stopper 54 to be gradient, one side of the stepped groove (21) in accordance with the rotation operation of the handle portion (51) The protruding upper edge surface, that is, the lower surface of the protruding portion of the stopper 22 is in close contact with the edge (22a) can be selectively fixed by sliding rotation. That is, since the slide part 55a is formed to be gradient, the handle part 51 is rotated along the edge 22a of the bottom surface of the protrusion 22 of the stopper 22 which partially protrudes into the stepped groove 21 during the rotation operation. While being constrained, the cover 40 can be coupled to the outer cylinder 20.

6A to 6B, when the handle part 51 is rotated to face the outside of the cover 40, the cover stopper 54 is interlocked to rotate, and at this time, the upper surface of the restraint protrusion 55 is provided. The slide portion 55a formed in the sliding portion is rotated along an edge 22a of the bottom surface of the stopper 22. Here, when the restraint protrusion 55 sliding along the slide portion 55a is constrained to the lower edge 22a of the protrusion of the stopper 22, the restraint protrusion 55 is fixed and the handle fixing device 50 ) Is provided with a cover 40 is pressed down.

In detail, the cover stopper 54 connected thereto when the handle part 51 is rotated outward by an external force is interlocked in the stepped recess 21, and the restraint formed in the cover stopper 54 is rotated. The protrusion 55 is in close contact with the upper edge surface of the stepped groove 21, that is, the lower surface edge 22a of the stopper 22, and is slid and rotated, and the cover 40 is pressed by the rotational force generated at this time. Can be.

In addition, the upper edge portion of the inner cylinder 30 which is connected to the inner cylinder 20 inside the extension portion 31 is formed so that one surface is fitted between the outer cylinder 20 and the seating portion of the cover 40, , It is preferable that the sealing projection 32 protrudes on one surface thereof. The extension part 31 formed as described above is fitted and fixed therebetween when the cover 40 is seated on the outer cylinder 20. As the cover 40 is pressed as described above, the sealing protrusion 32 is pressed. Grounding force with the lower surface portion of the cover 40 is improved.

That is, when the cover stopper 54 is rotated by rotating the handle part 51 to the outside, the slide portion 55a of the restraining protrusion 55 formed thereon is a lower edge of the protrusion of the stopper 22. The inner cylinder is constrained while being rotated along 22a, and the cover 40 is pushed downward by the rotation force generated at this time, and is fitted between the cover 40 and the edge of the outer cylinder 20. (30) The sealing protrusion 32 is formed in the extension portion 31 of the upper end is pressed.

Due to this, the sealing force of the cover 40 is remarkably improved, so that the liquid contained in the inner cylinder 30 can be prevented from leaking, and thus the durability of the centrifugal filtration device 100 can be remarkably improved. have. In addition, since the sealing force as described above can be expected only by the rotation operation of the handle 51, the ease of use can be significantly increased.

On the other hand, when the handle portion 51 is rotated to face the inside of the cover 40, the cover stopper 54 is rotated in conjunction with, at this time, the slide portion formed on the upper surface of the restraint protrusion (55) ( 55a) is slidably rotated along the edge 22a of the lower surface of the stopper 22. Here, the cover stopper 54 is separated from the stepped groove 21 when the restraining protrusion 55 which is slid and rotated along the slide part 55a is separated from the lower edge 22a of the protrusion of the stopper 22. Becomes possible.

In detail, the cover stopper 54 connected thereto when the handle portion 51 is rotated inward by an external force is interlocked and rotated in the stepped recess 21, and the restraint formed in the cover stopper 54 is rotated. The protrusion 55 is slid and rotated on the upper edge surface of the stepped groove 21, that is, the lower surface edge 22a of the stopper 22.

When the restraint protrusion 55 is separated from the stepped groove 21 and separated as described above, the cover 40, which has been pressed and lowered, may be raised, and the cover 40 may be lifted from an upper portion of the outer cylinder 20. Separation can be possible.

As such, the centrifugal filtration device 100 according to the present invention is sealed by simply rotating the handle part 51 to the outside or the inside of the cover 40 and the handle fixing device 50 as described above. In addition to the remarkable increase, since the cover 40 can be detached conveniently and quickly, the ease of use can be remarkably increased, and the efficiency of the purifying liquid to be purified can be remarkably improved.

On the other hand, Figure 8 is a plan view showing a state that the steering wheel fixing device is restrained in accordance with an embodiment of the present invention.

As shown in FIG. 8, the centrifugal filtration device 100 according to the present invention may selectively detach the cover 40 as the handle fixing device 50 rotates according to a rotation operation.

Here, the cover 40 is preferably provided with a plurality of locking projection members to limit the rotation radius of the handle fixing device 50. In detail, a guide shaft 52 extending in the longitudinal direction is formed on one lower surface of the handle part 51, and a holding spring 56 is coupled to the upper portion of the guide shaft 52.

At this time, the holding spring 56 is secured by fastening means such as fastening bolts to the opposite sides of the guide shaft 52 formed in the fixing portion formed extending to both sides and fixed to the locking projection member in the center thereof Preferably, the locking groove 56a is formed. In addition, the holding spring 56 is more preferably made of a metallic material having elasticity to be coupled while being elastically deformed to give a click feeling. In addition, it is preferable that the stopper 51a is formed at one side of the lower surface of the handle part 51.

The holding springs 56 and the stop protrusions 51a provided as described above are selectively locked to the first catching protrusions 45 and the second catching protrusions 46 provided at positions set at the cover 40, respectively. It may be fixed to limit the rotation radius of the handle fixing device 50.

In detail, the first locking protrusion 45 is provided at a position where the handle fixing device 50 can be fixed while being deformed in the locking groove 56a of the holding spring 56 when the handle fixing device rotates. It is more preferable that the constrained protrusion 55 is provided at a position corresponding to a set angle section that can be constrained or separated from the inside of the stepped groove 21 by rotation.

That is, when the handle fixing device 50 is rotated to the outside, the first locking stone above the cover 40 to limit the position F at which the cover stopper 54 and the stopper 22 can be restrained and fixed. Preferably, the group 45 is formed. In addition, it is more preferable that the second locking protrusion 46 is formed to be locked to the protruding surface of the stopper protrusion 51a so as to limit the rotation angle of the handle part 51.

In detail, the handle part 51 may be constrained to the first catching protrusion 45 and the second catching protrusion 46 formed at the set position F to limit the angle rotated toward the outside. The handle fixing device 50 can be prevented from rotating unnecessarily.

In addition, when the handle fixing device 50 is rotated inward, the cover stopper 54 and the stopper 22 are separated from each other above the cover 40 so as to limit the position S that can be separated. It is preferable that the first catching protrusion 45 is formed. In addition, it is more preferable that another second catching protrusion 46 is formed to be fixed to the protruding surface of the stopping protrusion 51a so as to limit the rotation angle of the handle part 51.

In detail, the handle part 51 may be constrained to another first locking protrusion 45 and a second locking protrusion 46 formed at a predetermined position S to restrict the angle rotated inward. In this way, the handle fixing device 50 may be prevented from being unnecessarily rotated.

On the other hand, the centrifugal filtration apparatus 100 according to the present invention can be used not only for the purification and recycling of the liquid to be purified, such as cutting oil, but also for the purification and recycling of various other liquids.

For example, the washing water used in the polishing process or the cleaning process of the glass used in glasses and the like may contain foreign substances of the glass material in the washing process, so that the centrifugal filtration device 100 of the present invention may be applied for recycling. That is, when the used washing water is supplied as the liquid to be purified, the purified water may be collected and recycled through the centrifugation process described above.

As described above, the present invention is not limited to the above-described embodiments, but may be modified by those skilled in the art without departing from the scope of the claims of the present invention. Such modifications are within the scope of the present invention.

10: drive means 20: outer cylinder
21: stepped groove 22: stopper
22a: bottom edge of the stopper protrusion 30: inner cylinder
31: extension part 32: sealing protrusion
40: cover 41: coupling hole
42: purifying liquid supply passage 43: purifying water discharge passage
44: impeller 45: the first locking projection
46: second locking projection 50: handle fixing device
51: handle portion 51a: stopper
52: guide shaft 53: rotating bush
54: cover stopper 55: restraint protrusion
55a: slide section 56: holding spring
56a: locking groove 100: centrifugal filtration device

Claims (5)

Drive means for providing a rotational force;
An outer cylinder disposed on an upper side of the driving means, the lower center of which is directly connected to the rotating shaft of the driving means, and having a stepped groove formed on an upper edge thereof;
An inner cylinder detachably coupled to an inner side of the outer cylinder;
A cover formed to purify the liquid supply path and the purge water discharge path and provided to be detachable from the outer cylinder; And
Centrifugal filtration device including a handle fixing device which is provided with a plurality of circumferentially spaced intervals in the upper end of the cover to selectively remove the cover is fixed to the upper edge of the stepped groove according to the rotation operation. The method of claim 1,
The handle fixing device
A handle part formed to extend downward in the longitudinal direction of the guide shaft,
A rotation bushing inserted into a coupling hole formed at an edge of the cover and having a hollow portion into which the guide shaft is inserted;
A cover stopper fixed to an end of the guide shaft, the cover stopper having a restriction protrusion formed on both sides of the guide shaft and extending to both sides to selectively restrain the stepped groove according to a rotation operation of the handle part. Centrifugal filtration. The method of claim 2,
A pair of stoppers are disposed on the upper edge of the stepped groove so as to face each other, and the constrained protrusions are interposed between the stoppers and selectively constrained to the lower surface of the stopper as they are selectively rotated. The method of claim 2,
A holding spring having a locking groove formed at a central portion thereof is coupled to the upper portion of the guide shaft.
Centrifugal filtration device, characterized in that the upper surface portion of the cover is provided with a pair of first locking projections coupled to the locking grooves to give a feeling of click so that the variable range of the rotation angle of the handle fixing device is bound. The method of claim 2,
A stopper protrusion protrudes on one side of the lower surface of the handle part,
Centrifugal filtration device, characterized in that the upper surface portion of the cover is provided with a pair of second locking projections to limit the variable range of the rotation angle of the handle fixing device.

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