Gas separation – With nonliquid cleaning means for separating media – For moving indefinite or continuous length separating media
Patent
1997-09-23
1999-08-24
Woo, Jay H.
Gas separation
With nonliquid cleaning means for separating media
For moving indefinite or continuous length separating media
55293, 55302, 55303, B08B 704
Patent
active
059420162
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a travelling cleaner for textile machines, in particular spinning and weaving machines, having a blowing and sucking device and a filter device which has at least one tubular filter cartridge, which is connected via an air connection to the blowing and sucking device of the travelling cleaner
BACKGROUND OF THE INVENTION
Such a travelling cleaner is known in its basic construction from DE-B-16 85 860. It has a blowing and sucking device, with which fibers, yarn remains and similar residues can be blown off the textile machines and then sucked up. In a filter device, these residues are separated from the transporting air. The filter may be in the form of a filter mat.
In practice, it is also known to install tubular filter cartridges in such travelling cleaners. The filter is connected via an air connection to the blowing and sucking device, so that cleaned air is available for the blowing off of the residues. In the case of the known filter cartridges, the air connection is situated on the end face, whereby the contaminated air flows axially into the cartridge and leaves radially through the filter casing. The known arrangement has problems with the multiple air deflections in the blowing and sucking device and also in the filter and with the effectiveness of the filter device. In addition, this arrangement makes it difficult to clean the filter cartridge. The yarn finish and size cause the filters to clog relatively readily, which leads to short filter service lives and leads to frequent maintenance and cleaning of the filter.
DE-A-26 25 559 and DE-A-22 21 117 show travelling cleaners with drum filters, which are subjected to negative pressure by an internal suction connection. The air flows through the filter casing radially from outside into the drum and leaves again axially.
For cleaning the soiled filter, filter-cleaning apparatuses are used. Such an apparatus is known from DE-B-16 85 860. It has a suction-removal device which can be docked on the filter chamber and with which it is intended to suck off and remove the residues from the flat filter. To depressurize the filter in this case, an additional shutter underneath the filter is opened, via which shutter the fan of the cleaning apparatus can take in secondary air.
Instead of suction removal, it is also known from DE-B-16 85 870 to blow out a flat filter in counter-air flow into a collecting chamber. The counter-air is generated by a reversing of the fan or a changing of its direction of flow by means of shutter control. There is no separate suction-removal device here. In addition, the fan of the cleaning apparatus is used for cleaning the filter. The mechanics required are complex, susceptible to faults and complicated in both citations.
DE-A-43 21 869 shows a different filter-cleaning apparatus. The blowing device of the travelling cleaner takes in ambient air via a drum filter which is rotatingly mounted and driven. The filter-cleaning apparatus has a blowing device and a suction-removal device, which are arranged on opposite sides of the filter and together clean the filter with a counter-flow flushing. The blowing device of the filter-cleaning apparatus is fed by the fan of the travelling cleaner and has no pressure generator of its own. The filter-cleaning apparatus operates with relatively low blowing and sucking pressures, which are aimed at providing low pressures and approximately equal volumetric flows. The blowing and sucking nozzles of the cleaning apparatus are directed in the same direction. The filter serves only for cleaning the ambient air taken in for the blowing operation, which is laden relatively little with fiber fluff and other contaminants. Therefore, low blowing and sucking pressures and low flow rates suffice for filter cleaning. The much more contaminated suction-removal air, which the cleaning apparatus sucks off the factory floor and off the textile machines, is not passed over the said but is diverted directly into the fixed suction duct and is passed there to the
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Pham Minh-Chau T.
Woo Jay H.
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