JP2000300914A - Filter apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the cleaning work of a place where sludge is accumulated, to naturally exclude a chip adhered to a hinge conveyor on the return side thereof and to dispense with the restriction of an arranging condition because of low constitution in a filter apparatus for removing a large chip in its initial stage and filtering off a small chip by the filter drum of a natural flow-down type filter apparatus. SOLUTION: The filter apparatus is equipped with a hinge conveyor for feeding a chip G with a large particle size while removing a liquid and a chip (g) with a small particle size on the way of the feed of a liquid to be filtered introduced from a first tank 2 along a first slope 5 to discharge the same, a chain 10 for introducing the liquid (s) and the chip (g) with a small particle size into a second tank 3 through the opening part 11 provided to the lower portion of the first slope 5 to discharge the same while feeding the same along a second slope 20 and an ejection pipe 16 for ejecting a liquid to a filter drum 12 provided with a filter for filtering a liquid to be filtered flowing in the drum and rotationally driven and the filter to wash them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device, for example, for separating a cutting oil before purification, which contains chips of random size and shape after use in metal cutting, into chips and cutting oil. The present invention relates to a filtering device used for obtaining a cutting oil after purification to enable repeated use.

[0002]

2. Description of the Related Art Conventionally, a cutting oil to be filtered (also referred to as a pre-purification cutting oil) containing cutting chips or abrasive powder after using metal cutting or grinding by various machine tools has been cut. Cutting oil that separates into powder and cutting oil to make it reusable
Many filtration devices for obtaining cutting oil after purification) have been proposed.

[0003] The applicant of the present application has provided a replaceable filter on the outer peripheral surface of a rotatably driven filter drum having a predetermined mesh in accordance with the filtering accuracy, and temporarily introduces the purified cutting oil filtered into the filter drum. A filtration device configured to take out the cutting oil after purification from the opening on the side surface of the filtration drum, and pass through the filtration filter without positively applying pressure to the filtrate to be treated. This is a so-called natural flow-down type based on the operation principle of obtaining and recovering a filtered solution.

On the other hand, a recent machine tool, as represented by a machining center, performs all kinds of machining with one machine. Therefore, after being used in this machining, a cutting chip is mixed. The cutting oil is in a state containing spiral chips or small-sized random chips of large and small sizes. In order to filter and reuse the liquid to be filtrated containing the chips having different sizes and shapes as described above, if the liquid is allowed to flow directly into the above-mentioned free-flow type filtration device, the chips having a particularly large size during the transportation are required. As a result, clogging occurs immediately, making continuous operation impossible.

[0005] Therefore, conventionally, a large-sized chip is removed by removing a large-sized chip in an initial stage, and filtering a small-sized chip by a gravity-draining filter in a next step by a filtration drum. A device in which a device for removing water and a gravity-flow-type filtration device are arranged so as to be in a vertical positional relationship has been put into practical use.

According to the above-mentioned machining center,
The installation space for disposing the filtration device may be very limited, and the filtration device in the initial stage is provided in a very limited space between the floor surface and the bottom surface of the device.

FIG. 5 is a front view showing an example of an apparatus configuration in which large-sized chips are removed at an initial stage, and small-sized chips are filtered by a gravity-drain type filtration device in a next stage by a filtration drum. . In this figure, a random swarf G formed into a spiral or small piece of large or small size after use,
The liquid to be filtered in a state where g and the cutting oil S are mixed is supplied from the inlet 204 to the tank 20 through the transfer device 101 or the duct.
In the course of being transported along the inclined surface 205 formed obliquely upward from the tank bottom while being introduced into the inside of the tank 0, the cutting oil and the small small chips g having a small size are removed while the large large chips G are mainly removed. Hinged conveyor 207 for transport and discharge
Is provided.

[0008] Further, below the inclined surface 205, a small-sized chip g is transported along the inclined surface 220 by a raising member provided on the chain 210, and a filter drum provided with a filter on the outer peripheral surface. 212 is provided so as to be in a vertical positional relationship with the above-mentioned free-flow type filtration device.

[0009]

However, in the filter device constructed as described above, when the filter device is installed at the floor or at the position of the height H, the periodic inspection location A of the tank 200 is required.
However, it is very difficult to clean a place where small chips, sludge and the like are deposited. Further, small chips adhered to the return side of the hinge conveyor remain as they are. Further, since a height of 200 minutes is required, the installation conditions are further limited.

Therefore, the filtering device of the present invention has been made in view of the above circumstances, and removes large-sized solids or chips at an initial stage, and uses a gravity-flow type filtering device to remove small-sized solids. Or, in a filtration device that filters chips in the next step by a filtration drum, cleaning work for a place where small solids and sludge are accumulated becomes unnecessary, and small cuttings attached to the return side of an endless large solids conveying means. An object of the present invention is to provide a filtration device which can eliminate powder and can be configured at a low level, and is not limited by installation conditions.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, according to the present invention, a liquid is filtered from a liquid to be filtered in which solids and liquids having random sizes and shapes are mixed. Or a filtration device for separating solids from the solid matter, wherein the liquid to be filtered is introduced from the inlet of the first tank and transported along a tank bottom and a first inclined surface formed obliquely upward from the tank bottom. On the way, while removing the liquid and the small solids having a small size, the large solids having a large size are transported to the first discharge portion above the first inclined surface, and are discharged. The liquid and the small solid are introduced into the second tank through the first transporting means and the opening provided below the first inclined surface, and the small solid is introduced into the second tank. While transporting along the second inclined surface of the second tank, the second tank above the second inclined surface An endless second conveying means for conveying and discharging the liquid to be filtered out, a filter provided on an outer peripheral surface for flowing the liquid to be filtered into the inside and filtering the liquid, A filter drum that is provided with an opening that opens at least on a side surface to allow the filter to flow out of the second tank, and is rotatably driven inside the second tank; and a jetting unit that cleans the filter by jetting a liquid. It is characterized by having.

Further, the invention is characterized in that a hinge type conveyor is used as the first transport means.

[0013] The second conveying means comprises a chain and a plurality of second lifting members fixed to the chain, and is provided so as to mesh with the chain sprocket of the filtration drum. , Wherein the rotational drive is performed. And the liquid to be filtered is
It is a cutting oil before filtration in a state containing chips of random size and shape used in metal cutting, and the liquid is a cutting oil after filtration after separation into chips and cutting oil. I have.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing the internal structure of a filtration device 1 according to one embodiment. In this drawing, the liquid to be filtered is a mixture of a solid and a liquid having a random size and shape, and any type can be used as long as it is separated and filtered into a solid and a liquid. In the following, a description will be given of a case in which the liquid to be filtered is a mixture of cutting oil and cutting chips generated in the machining apparatus 100 shown by a dashed line in the drawing.

Referring to FIG. 1, a tank serving also as a mounting base for all components of the filtering apparatus 1 is composed of a first tank 2 and a second tank 3, and is horizontally placed on a floor in a factory. Adjusted and fixed. At this time, the first tank 2 is installed as shown in a state in which the first tank 2 is sneaked below the height H of the machine tool 100, which is various types of machining devices.

The first tank 2 is provided with an inlet portion 4 which opens upward, and has a large or small spiral or small random large chip after use in the machine tool 100. G, a small chip g and grinding powder are contained in the cutting oil S, and the liquid to be filtered before filtration in a mixed state is transferred to the conveyer 50 or the duct in a direction indicated by an arrow. By being introduced from the inlet portion 4 into the inside of the first tank 2, it flows into the hinge conveyor 7. In this way,
As shown in FIG. 2, which is a cross-sectional view taken along line XX of FIG. 1, the cutting oil to be filtered is introduced with a slight change in the predetermined liquid level L.

The hinge conveyor 7 drops large chips G from the first discharge portion 6 provided on the upstream side.
A motor (not shown) is provided between the drive shaft 8 and the idler shaft 9 in an endless state, and extends along a first inclined surface 5 extending obliquely upward from the horizontal bottom of the first tank 2 as shown in the figure. Driven by

With the above configuration, the large chips G on the outward path of the hinge conveyor 7 are transported upward, and the chip collection box 25
Will be dropped inside.

As shown in FIG. 2, the hinge conveyor 7 is formed as a connecting hinge body provided with rollers 28 individually rotating on guides 29 provided on the tank 2, and is provided with endless ends 7a and 7b. Perform exercise. Also, left and right wall portions 27 are fixed to each hinge body as shown in the figure, and small chips g overflowing on these wall portions 27 are formed.
Will flow in the direction of the arrow, and will face the bottom. Similarly, the liquid containing the small chips g also flows downward from the gap between the connecting hinge bodies as shown by the arrow. In this way, the liquid containing the small chips g flows toward the bottom of the tank 2 and flows in the direction of the arrow shown in FIG.
Flows into the horizontally long opening 11 formed below the inclined surface 5 of FIG.

Referring again to FIG. 1, the second tank 3 is provided with an arc portion along the outer peripheral surface of the filtration drum 12 and a second inclined surface 20 continuously formed diagonally upward from the arc portion.
At the upper end of the second inclined surface 20, the left and right side plates are integrally welded so as to have a shape for dropping small chips g.

The second tank 3 is provided with bearings (not shown) for rotatably supporting the filtration drum 12 and a shaft 13 supported by these bearings at positions shown in the drawing. Further, inside the filtration drum 12, there is provided an injection pipe 16 which is provided on the outer peripheral surface of the filtration drum and injects the purified liquid so as to eliminate clogging of the filtration filter for filtering the liquid. . The filter drum 12 has a V-shaped cross section of a kind of a lip rubber seal, and is provided with a V-seal for maintaining a liquid-tight state by slidably contacting a side portion of the filter drum.
2 is slidably supported in a liquid-tight state.

Further, an opening (not shown) is formed on the right side surface of the filtration drum 12 so as to communicate with an opening 14 formed in the side plate. It is configured so that the purified cutting oil after filtration flows thereinto.

As described above, by constituting the filtration drum 12, the shaft 16 and the ejector 6 can be easily moved outside along the inner wall surfaces of the left and right side plates as required, so that they can be easily taken out. The configuration is such that the filter filter replacement operation can be easily performed.

Next, with further reference to the enlarged view of the main part of FIG. 3, the chain 10 driven by a motor with a gear head (not shown) in the direction of the arrow shown in FIG.
Is fixed as shown, and the chain 10
Is meshed with a chain sprocket 44 fixed to the edge of the outer peripheral surface of the filtration drum 12, so that the filtration drum can be driven to rotate in the direction of the arrow.

With the above configuration, the liquid S is supplied to the filtration drum 1
2 is rotated into the filter drum via the filter 22 (shown by broken lines) and filtered, and then the opening 14
Through the purification tank 15. In addition, small chip g
The second inclined surface 20 shown in FIG.
, And is discharged from the second discharge unit 21 and falls into the collection box 25.

On the other hand, the large swarf G is conveyed obliquely upward by the raising member 33 fixed at a predetermined interval on the outward path 7a of the hinge conveyor 7, and similarly dropped.

As described above, large-sized chips are removed in the initial stage, and can be filtered in the next stage by a small-sized rotating filter drum by a gravity-flow type filtration device. By providing the portion 11 at the turning position of the hinge conveyor 7 as shown in the figure, the return path 7b
Flows (in the direction of the double arrow in the figure). This flow is to wash the return path 7b, so that the “return chips” that adhere to the hinge plate and cannot be discharged can be washed out and completely removed. As a result, at least the hinge conveyor 7 can be made maintenance-free.

FIG. 4 shows a second example of the filtration device described above.
It is a front view of the tank 3 of FIG. In this drawing, the same reference numerals are given to the components already described and the description is omitted. First, an inspection window 36 is provided on the left and right side plates,
Allows for internal inspection. Further, plate-like magnets 40 are provided on the bottom surface and the inclined surface of the tank so as to promote the sedimentation of small chips by magnetic attraction. In particular, the present invention is effective for effectively carrying out carbon scale and sludge in the cutting processing of iron castings.

As described above, since the space for the inflow from the hinge conveyor to the filtration filter of the filtration drum is small, the inflowing chips are immediately discharged, so that fine chips generated by high-speed rotation end milling can be processed. The sealing surface is N
The BR packing and the fluid packing are used in combination to enhance the sealing performance.

Further, since the filter drum 12 can be pulled out from between the left and right side plates as described above, the cover member 37 can be detached from the front surface, and the work of attaching and detaching the filter drum 12 becomes very easy.

It is needless to say that the present invention is not limited to the configuration described above, and the case where cutting fluid is used as the liquid to be filtered before filtration is described.
The present invention can be applied to all liquid filtering devices in which solids having different sizes and random shapes are mixed in the liquid.

[0033]

As described above, according to the present invention,
Remove large size solids or chips at an early stage,
In a filtration device that filters small-sized solids or swarf in the next stage by a filtration drum using a gravity-flow type filtration device, cleaning work where small solids and sludge are deposited is unnecessary, and endless large solids are removed. Since small chips adhering to the return side of the object transporting means can be eliminated and can be configured low, it is possible to provide a filtration device which is not limited by its installation conditions.

[Brief description of the drawings]

FIG. 1 is a front view showing an internal configuration of a filtration device 1 according to one embodiment.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged view of the filtration drum of FIG.

FIG. 4 is a front view of a filtration device according to another embodiment.

FIG. 5 is a front view showing an internal configuration of a conventional filtering device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration apparatus 2 1st tank 3 2nd tank 4 Inlet part 5 1st inclined surface 7 Hinge conveyor (1st conveyance means) 10 Chain (2nd conveyance means) 11 Opening 12 Filtration drum 14 Opening 16 Injection tube 22 Filtration filter G Large chip g Small chip s Cutting oil (liquid)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 35/22 B23Q 11/00 U 36/00 B01D 33/34 B03B 9/00 35/02 E B23Q 11 / 00 F term (reference) 3C011 BB34 4D026 BA01 BB01 BC18 BC29 BF06 BF09 4D064 AA23 BM28 BM34 BM37 DC06 4D066 AA06 BB22 BB24 BB31 FA02 4D071 AA06 AA07 AB03 AB06 AB07 AB33 AB62 DA20

Claims (4)

[Claims] 1. A filtration device for filtering a liquid or separating a solid from a liquid to be filtered in which a solid and a liquid having random sizes and shapes are mixed, wherein the liquid to be filtered is supplied from an inlet of a first tank. While the liquid and the small solid matter having a small size are removed while the liquid is being conveyed along a tank bottom and a first inclined surface formed obliquely upward from the tank bottom, the first inclined surface is removed. Through an endless first conveying means for conveying and discharging a large-sized large solid matter to a first discharging portion above the first inclined portion, and an opening disposed below the first inclined surface. hand,
The liquid and the small solid are introduced into the second tank, and the small solid is transported along the second inclined surface of the second tank while the small solid is transported along the second inclined surface. An endless second conveying unit that conveys and discharges the liquid to the second discharge unit, a filtration filter provided on an outer peripheral surface for inflowing and filtering the liquid to be filtered, and a liquid after filtration And a filter drum rotatably driven inside the second tank, and cleaning the filter by jetting a liquid. A filtering device comprising: an injection unit. 2. The filtering device according to claim 1, wherein a hinge type conveyor is used as the first conveying means. 3. The second transporting means includes a chain and a plurality of second lifting members fixed to the chain. The second transporting means meshes the chain with a chain sprocket of the filtration drum, and rotates the chain. 3. The filtration device according to claim 1, wherein the filtration device is driven. 4. The liquid to be filtered is a cutting oil before filtration used in metal cutting and containing chips of random size and shape, and the liquid is separated into chips and cutting oil. The filtering device according to claim 1, wherein the filtering device is a filtered cutting oil.