JPH04110001A - Filter for working liquid - Google Patents

Abstract

PURPOSE:To make the filtering device thin and compact by providing in parallel plural rotating drums having plural number of holes in the outer surface, preventing a working liquid from intruding into spaces between a continuous sheet filter and the rotating drum end, and sucking the working liquid into the rotating drums. CONSTITUTION:Plural rotating drums 12 having plural number of holes 14 in the outer surface are provided in parallel in a working liquid tank 8 so that a continuous sheet filter 10 is circulated with the rotating cylinder drums 12 and moved with the rotation of the drums 12 by releasing and winding devices. A polluted working liquid 9 is sucked and filtered with each sucking pump through a duct each connecting to the sucking hole 32 of the drum 12. To prevent direct intrusion of the contaminated liquid 9 to the inside of the drum 12, a monolithic end cap member 25 surrounding the end of each drum 12 is fixed and a rectangular plate member 28 is provided to each space between drums 12 and joined with the cap member 26. Further, a partial cylindrical member 30 made in one body with the cap member 26 is provided to cover the end drum 12 in a specified angle range.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention filters various machining debris mixed in the machining fluid used in machining in a machine tool, and processes [Prior Art] As a device for filtering contaminated machining fluid, a sheet-like filter is placed on a flat conveyor, and a chamber with a large number of holes on the upper surface is provided below the conveyor, and suction is drawn from inside the chamber and filtered. There is a structure in which the sheet filter is moved by a conveyor sliding on the conveyor.

However, the planar structure requires a large floor space, and the planar structure also has the drawback of having a low resistance to suction force. Therefore, in order to solve these problems, it is possible to adopt a drum-shaped suction filtration device.

[Problem to be solved by the invention]

However, it is often necessary to design a filtration device in a narrow space, and in that case, both the above-mentioned planar structure and drum cane structure have to be designed in terms of expansion space and height space, respectively. In some cases, it may not be possible to employ a mucosa that provides the required filtration flow rate.

Therefore, an object of the present invention is to provide a processing fluid filtration device that is thin and compact, yet can obtain a desired filtration flow rate, and has high strength against suction force.

[Means to solve the problem]

In view of the above object, the present invention provides a rotary cylinder that is immersed in a machining fluid tank storing used machining fluid, is rotatably attached around a longitudinal center axis, and has a plurality of holes on the outer circumferential surface of the cylinder. A plurality of drums are arranged in parallel, a continuous sheet-like filter is wound so as to be fed and movable over the outer peripheral surface of each of the plurality of rotating drums, and processing is performed from the gap between the continuous sheet-like filter and the end of each rotating drum. A suction device is provided to prevent the liquid from entering and to suck the machining liquid into each of the rotary drums through the continuous sheet filter and the plurality of holes of the rotary drum. Provides a processing fluid filtration device.

[Function] Since the configuration includes a plurality of rotating drums arranged in parallel, it can be configured thinner than a configuration using one large rotating drum that can obtain the same filtration flow rate. Furthermore, since the suction force acts on each rotating drum, the strength is greater than that of a planar structure. Furthermore, since the continuous sheet filter is wound around the outer peripheral surface of each rotating drum, the filtration area becomes larger than in the case of a flat structure.

〔Example〕

The present invention will be described in more detail below based on embodiments shown in the accompanying drawings.

First, referring to FIGS. 1 and 2, a large number of holes 14
A cylindrical drum 12 (as clearly shown in FIG. 3, etc.) provided on its outer peripheral surface is arranged side by side within a thin machining liquid tank 8. These cylindrical drums 12 are rotatably mounted, each having a sprocket 20 attached to one end thereof, and configured to rotate together in the same direction by a chain 22. As shown in FIG.
0 completely winds around the rotating cylindrical drum 12, and can be moved along with the rotation of the rotating cylindrical drum 12 by a feeding device and a collecting device (not shown). The contaminated machining liquid 9 is filtered through this sheet-like filter 10 and a hole 14 provided on each rotating cylindrical drum 12, which communicates with a suction hole 32 (see FIG. 3) at one end of each rotating cylindrical drum 12. The water is filtered by suction through the duct 18, which is not shown, using a suction pump (not shown). In FIG. 1, a portion of the sheet filter 10 is drawn with a dashed line, indicating that any number of rotating cylindrical drums 12 can be provided therebetween.

When a filtration device is constructed by arranging such cylindrical drums 12 in parallel, it not only becomes a thin filtration device as shown in FIG. is used as the filtering agent, and since the outer circumferential surface is arcuate, the 'a passing area becomes larger than in the case of a simple flat filtration device. Furthermore, since the suction force acts on each cylindrical drum 12, the cylindrical member has higher rigidity than a flat member due to its mechanical properties.

When the above filtration device is actually used, it is necessary to prevent the contaminated machining fluid from entering the rotating cylindrical drum 12 without passing through the sheet filter 10. A sealing member for this purpose will be explained with reference to FIGS. 3 and 4. Reference numeral 24 indicates a fine wire mesh, especially if the sheet filter lO is a paper filter, but the cylindrical drum 1 has relatively large holes.
Sheet-like filter 10 for holes 14 provided in 2
If it is directly adsorbed, there is a risk that it will be damaged by the suction force, so this is to prevent this, but it is not an essential matter of the present invention. First, in order to surround the end of each rotating cylindrical drum 12, an integral end cap member 26 having a size with a gap to the surface of each end so that each rotating cylindrical drum 12 can rotate is attached to the tank. Fixed to 8. A rectangular plate member 28 as shown is disposed in the gap between each rotating cylindrical drum 12. These members 26
, 28 are made of sheet metal, for example, and the rectangular plate member 28 and the camp member 26 are joined by welding or the like. Similar to the cap member 26 described above, this rectangular plate member 28 is provided with a gap therebetween without contacting the rotating cylindrical drum 12. Furthermore, a portion 10b where the sheet-like filter 10 begins to be wound around a series of rotating cylindrical drums 12, and a winding end portion 1.
A predetermined angular range of the rotating cylindrical drum 12 at the juxtaposed end portion remaining between the rotating cylindrical drum 12 and the rotating cylindrical drum 12 is controlled by a partial cylindrical member 30 (also shown in FIG. 1) integrated with the cap member 26. It is covered with a gap from the drum 12. The cap member 26 and the partial cylindrical member 30 are for preventing the contaminated machining fluid from entering through the gap formed between the sheet filter 10 and the end of each cylindrical drum 12.

If the sheet-like filter 10 is wound around each of the above members 26 , 28 , and 30 , the sheet-like filter 10 is moved around each member 26 by the suction force through the holes 14 of each rotating cylindrical drum 12 . , 28 and 30, and sealing is performed. Note that, as described above, the hole 32 of the cap member 26 is a suction hole to be connected to the duct 18. Further, it is not essential to drive the cylindrical drum 12 to rotate by the sprocket 20 and the chain 22.
may be rotatably supported and rotated as the sheet filter 10 moves.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to provide a processing fluid filtration device that is thin, compact, and highly rigid. Depending on the configuration of the installation space, it is possible to increase or decrease the number of rotating cylindrical drums installed in parallel, and in that case, the filtration flow rate can also be changed to a desired value.

[Brief explanation of the drawing]

FIG. 1 is a schematic end view of a filtration device according to the present invention, FIG. 2 is a schematic perspective view of a filtration device according to the present invention, and FIG. 3 is an explanatory diagram of a sealing member of the filtration device according to the present invention. FIG. 4 is an explanatory diagram of the sealing member of the filtration device according to the present invention. lO... Sheet filter 12... Rotating cylindrical drum, 18... Duct,
20... Sprocket, 22... Chain, 26... End cap member, 28... Rectangular plate member, 30... Partial cylindrical member.

Claims (1)

[Claims] 1. A plurality of rotating drums are immersed in a machining fluid tank that stores used machining fluid, and are rotatably mounted around a longitudinal center axis, with a plurality of rotating drums having a plurality of holes on the cylindrical outer circumference surface. , a continuous sheet filter is wound movably around the outer peripheral surface of each of the plurality of rotating drums, and processing liquid is prevented from entering through the gap between the continuous sheet filter and the end of each rotating drum. A filtration device for machining fluid, comprising: a suction device that sucks the machining fluid into each of the rotary drums through the continuous sheet-like filter and the plurality of holes of the rotary drum.