The invention relates to a device for holding and separating chippings and cooling liquid accumulating on machine tools, the cooling liquid being returned for reuse and the chippings being removed, comprising a holding tank for holding the chippings and the cooling liquid, a rising guide section, adjoining the holding tank, an elevated discharge section, adjoining the guide section, a chain-like closed conveying element, which is guided over return elements, at least in the region holding the chippings and the cooling liquid and in the discharge section, at least one of which elements is coupled to a rotary drive, and a rotatably mounted filter drum, which is in drive connection with the conveying element.
Such a device is known from German patent application 102 23 290.3. Also, a similar device is disclosed in GB 2 302 818. This document describes a device for holding and separating chippings and cooling liquid accumulating on machine tools, comprising a rotating drum filter. Fixedly arranged in the lower region of the filter drum in that case is an inlet tube, which runs parallel to the axis of said filter drum and extends at least over part of the length of the latter. Said inlet tube is in turn connected to a suction tube, which enters the filter drum through the axis thereof and is connected outside to a pump. This arrangement allows filtered liquid to be sucked out from the interior of the filter drum. It is further provided to return part of the sucked-out filtered liquid into the drum and apply it to the wall by means of spray nozzles in the upper region of the drum, in order in this way to flush away residues adhering to the outside.
The invention is based on the object of developing a device of the generic type in such a way that in particular the space requirement that is required altogether for the device is considerably reduced.
This object is achieved in the case of a device of the type mentioned at the beginning by fixedly arranging in the lower region of the filter drum an invertedly channel-shaped covering element, which runs parallel to the axis of said filter drum and extends at least over part of the length of the latter, by the covering element communicating in a sealing manner at its one end with an opening in one wall of the drum housing, and by the opening being connected to a suction line, which is in connection with a suction element, which is arranged at a higher level and discharges into a collection tank.
The cooling liquid which enters the filter drum and is thereby cleaned is passed through an opening in the side wall and then fed via a suction line to a pump, from which the cleaned cooling liquid is directed to a collection tank. This upward conveyance of the cleaned cooling liquid therefore passes close by a side wall of the drum housing and partly also above this housing, so that the entire standing area of the device can be made very small.
According to the invention, it is further provided that the side walls of the covering element reach close to the inner surface of the filter drum, so that the space underneath the covering element is at least partly restricted at its side edges. Consequently, the suction pressure exerted by the pump via the suction line acts in particular in the region enclosed by the covering element.
Further advantageous features of the invention are stated in particular in the claims and are supported by the description.
An exemplary embodiment of the device according to the invention is described below on the basis of drawings, in which:
The device according to the invention that is schematically represented in
Provided for conveying the chippings in the exemplary embodiment shown is a scraper chain 4 (represented in
In the exemplary embodiment according to
The filter drum 9 is provided on its circumference with a covering 10 (
The covering element 11 is fixedly supported at its end lying on the left in
Furthermore, it is provided that a tube 20, which is provided with jet openings and the free end of which is closed in the region of the filter drum 9, is fixed on the side wall 14 of the filter drum 9. This tube 20 serves the purpose of directing cleaned cooling water in a jet-like manner against the covering of the filter drum 9, in order to blast the covering 10 from the inside and dislodge contaminants situated on the outside of the filter drum 9.
List of Designations
1 holding tank
2 guide section
3 discharge section
4 scraper chain
5 gear wheel
6 crank pin
7 push rod
8 ratchet wheel
9 filter drum
10 covering
11 covering element
12 side wall
13 inner surface
14 wall
15 housing wall
16 connecting piece
17 suction tube
18 suction pump (suction element)
19 collection tank
20 backflush tube
Number | Date | Country | Kind |
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102004032334.8 | Jul 2004 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2005/007123 | 7/1/2005 | WO | 00 | 9/29/2009 |