JP2002177713A - Suction filtration equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide suction filtration equipment which separates cutting oil containing the chips generated in metal cutting to the chips and the cutting oil. SOLUTION: A storage tank which forms a slope and a scraper which is disposed in this storage tank, scrapes up the chips to the downstream side of a discharge port disposed above the slope and drops the chips from this discharge port are disposed in the suction filtration equipment for separating the cutting oil containing the chips generated in metal cutting to the chips and the cutting oil. The suction filtration equipment described above has a filtration drum which has an aperture for allowing the cutting oil after filtration by a filter to flow outside the storage tank and is rotationally driven in a liquid-tight state within the storage tank and a drum lid which generates the negative pressure necessary for suction filtration by the filter and makes the suction filtration possible by covering the filter within a prescribed range above the lowest liquid level at the fluctuating liquid level height. The top surface of the drum lid is fitted with an inspection window and this inspection window is openably disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction type filtration device capable of separating chips and cutting oil from cutting oil containing chips generated by metal cutting.

[0002]

2. Description of the Related Art Conventionally, there are many filtering devices for obtaining cutting oil which can be separated and reused from cutting oil including cutting chips generated by metal cutting by various machine tools. Proposed. In such a filtration device, for example, as a device disclosed in Japanese Utility Model Laid-Open No. 2-83003, a filter drum 12 is disposed in a storage tank 3 as shown in FIG. An inlet 2 for the discharged cutting oil is provided, and an inclined rising plate 4 continuous from the bottom plate 5 is provided on the side facing the inlet 2 for the discharged cutting oil, with the tip facing the outside of the storage tank 3. The conveyor 9 with the scraper 8 is rotated from the bottom plate on the inlet 2 side of the discharged cutting oil to the tip of the inclined rising plate 4 by a rotating mechanism 14 provided at the inlet 2 and the tip of the inclined rising plate 4, respectively. There is known a filtering device in which the cutting is scraped up and the chips 6 are discharged from a tip of the rising plate 4 into a chip collecting box 7.

On the other hand, in such a filtration device, a suction type filtration device has been proposed in which a negative pressure is applied to improve the filtration performance of the filtration drum in order to positively flow the filtrate into the inside of the filtration drum. I have. However, since this suction-type filtration device is used by being connected to various machine tools, the liquid level of the used cutting oil varies depending on the operation state of the machine tool. For this reason, for example, when the liquid level fluctuates in the liquid storage state and suction filtration is performed by a rotating filter drum at a portion lower than the liquid level, there is a problem that air is sucked.

[0004]

To solve these problems, a method has been proposed in which a drum lid is provided on the upper surface of a filter drum and the filter drum is sealed with the drum lid. In the suction type filtration device, air pools are generated between the filtration drum and the drum lid, so that the air between the filtration drum and the drum lid does not escape, and the pressure generated in the air pool causes the liquid level of the cutting oil. Is low as described above, there is a problem that the effective filtration area of the filtration drum is reduced, and further, because of the drum lid,
For inspection of filter drum or cleaning at the time of clogging,
There was a problem that the entire lower side or drum lid had to be removed.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have made intensive developments, and as a result, provided an inspection window on the upper surface of the drum lid, and the inspection window is provided with mounting bolts or tightening bolts. Provision of bolts or fasteners makes it easy to remove, which makes it easy to release air, and allows the user to work while visually checking the cleaning from above, and also to perform cleaning easily. An object of the present invention is to provide a suction-type filtration device provided with an air vent pipe.

The gist of the invention is as follows: (1) A storage tank having an inclined surface in a suction type filtration device for separating cutting oil and cutting oil from cutting oil containing cutting chips generated by metal cutting. And a scraper for scooping the chips toward the downstream side of the discharge port disposed in the storage tank and disposed above the inclined surface and dropping the chips from the discharge port, and A filter drum having an opening for allowing the cutting oil after filtration to flow out of the storage tank to the outside of the storage tank, and being rotationally driven in a liquid-tight state in the storage tank; A drum cover for generating the necessary negative pressure and covering the filter in a predetermined range equal to or higher than the lowermost liquid level of the variable liquid level, thereby enabling the suction filtration; and Attach the inspection window to the upper surface of the A suction-type filtration device, which is disposed so as to be easily opened.

(2) The suction-type filtration device according to (1), wherein an air vent pipe is provided on the upper surface of the drum cover. (3) The suction-type filtration device according to (1), wherein a cock or a valve capable of maintaining a negative pressure is provided at a tip of an air vent pipe provided on an upper surface of the drum cover. It is in.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a suction-type filtration device according to the present invention. In FIG. 1, the suction-type filtration device 1 includes:
It serves as a mounting base for the components of the entire apparatus, and the cutting oil used in the machine tool section 16 is injected into the storage tank 3 from the input port 2. The storage tank 3 scoops the chips 6 toward the downstream side of the chip discharge port 13 disposed above the inclined rising plate 4, drops the chips 6 from the chip discharge port 13, and freely drops the chips 6 into the chip collection box 7. A scraper 8 is fixed to the conveyor chain 9 at equal intervals.

FIG. 2 is a sectional view of the filtration drum according to the present invention. As shown in FIG. 2, the drum sprocket 18 of the filtration drum 12 is configured to be continuously rotated and driven by the drive of the drive motor 15, and is assembled in a state of being meshed with the endless conveyor chain 9. I have to. While these conveyor chains 9 are guided along a trajectory as shown in the figure, in order to apply a rotational driving force to the filtration drum 12 on the way, the conveyor chain 9 is turned on the filtration drum 12 at a portion where the chain turns downward. It meshes with the fixed drum sprocket 18 and enables driving by a common driving motor 15. At predetermined intervals between the conveyor chains 9, scrapers 8 for sending out the settled chips 6 in the used cutting oil toward the upstream as described above are fixed by a predetermined number,
A configuration in which the cutting chips 6 are conveyed upstream and the cutting oil is sufficiently removed from the chips while the cutting chips 6 in the used cutting oil are conveyed toward the upstream of the discharge port 13. Have been.

On the other hand, a seal for completely sealing the outer surface of the drum sprocket 18 provided on the filtration drum 12 in a completely liquid-tight state is provided. The opening communicating with the negative pressure chamber communicates with the negative pressure pipe 17. The negative pressure generated by a pump (not shown) is used to perform suction filtration from the outside to the inside of the filtration drum 12 in the direction of the arrow, and after filtration. Of the cleaning oil can be discharged to the negative pressure pipe 17. The drum lid 19 is provided so as to cover the filtration drum 12. In this case, as described above, in the conventional case, an air reservoir 20 is generated between the filtration drum 12 and the drum lid 19, and therefore, the air between the filtration drum 12 and the drum lid 19 does not escape. Due to the increase of the air pool 20, the liquid level in the drum lid 19 decreases.

For this purpose, in the present invention, the pressure generated by the air reservoir 20 is reduced as much as
In order to prevent the liquid level inside from dropping, an inspection window 21 is attached to the upper surface of the drum lid 19, or an inspection window 21 is attached to the upper surface of the drum lid, and an air vent pipe 22 is connected to the upper surface of the drum lid. Provided. Such a drum lid 19
As shown in FIG. 2, the depth of the drum lid can be made lower by Hmm than the lower surface of the drum, as shown in FIG. 2, without providing a special foreign matter receiving facility for preventing damage to the drum that becomes foreign matter carried on the conveyor. Drum lid can also be used.

FIG. 3 is a schematic view of a drum cover according to the present invention. As shown in this figure, an inspection window 21 is mounted on the upper surface of the drum lid 19 with bolts 11 or fastening fittings, and the inspection window 21 is regularly inspected, and the inspection window 21 is bolted or tightened. By loosening the metal fittings, it is possible to easily inspect the filtration drum 12 and to extract air. In addition, as described above, the inspection window 21 is provided, the air vent pipe 22 is provided on the upper surface of the drum cover 19, and a cock or a valve 23 such as a check valve or a solenoid valve capable of maintaining negative pressure is provided at the tip. With this arrangement, the air reservoir 20 generated between the filtration drum 12 and the drum lid 19 is discharged to the outside air. As a result, the depth of the drum can be made lower than the lower surface of the drum, and the effective filtration area of the filtration drum can be prevented from decreasing, and the maximum filtration area can be secured.

[0013]

As described above, by disposing the inspection window or the air vent pipe according to the present invention, it is possible to filter chips from used cutting oil whose liquid level fluctuates in the state of liquid storage and re-use the chips. When obtaining usable cutting oil, the storage tank can be configured as shallow as possible, extremely inexpensive equipment can be used, and the filter drum can be easily inspected and cleaned. Is played.

[Brief description of the drawings]

FIG. 1 is a side view of a suction-type filtration device according to the present invention.

FIG. 2 is a sectional view of a filtration drum according to the present invention.

FIG. 3 is a schematic view of a drum lid according to the present invention.

FIG. 4 is a cross-sectional view of a conventional filtration device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction type filtration apparatus 2 Input port 3 Storage tank 4 Inclined rising plate 5 Bottom 6 Chips 7 Chip recovery box 8 Scraper 9 Conveyor chain 10 Filtration filter 11 Bolt 12 Filtration drum 13 Cutting discharge port 14 Rotary mechanism 15 Drive motor 15 Injection Pipe 16 Machine tool section 17 Negative pressure pipe 18 Drum sprocket 19 Drum lid 20 Air reservoir 21 Inspection window 22 Air vent pipe 23 Valve capable of maintaining negative pressure

Claims (3)

[Claims] 1. A suction filtration device for separating chips and cutting oil from cutting oil containing cuttings generated by metal cutting, a storage tank having an inclined surface, and a storage tank provided in the storage tank. A scraper for scooping the chips toward the downstream side of the discharge port disposed above the inclined surface and dropping the chips from the discharge port is provided, and the cutting oil filtered by the filter is removed. A filter drum having an opening for flowing out of the storage tank and being driven to rotate in a liquid-tight state in the storage tank; and generating a negative pressure required for suction filtration by the filtration filter. A filter lid is provided to cover the filtration filter in a predetermined range of the liquid level or higher, which is equal to or higher than the lowermost liquid level, and a drum lid for enabling the suction filtration is provided. The feature is that the windows are easily openable Suction type filtration device. 2. The suction-type filtration device according to claim 1, wherein an air vent pipe is provided on an upper surface of the drum cover. 3. The suction-type filtration device according to claim 1, wherein a cock or a valve capable of maintaining a negative pressure is provided at a tip of an air vent pipe disposed on an upper surface of the drum cover. apparatus.