Fluid sprinkling – spraying – and diffusing – With cleaning means – drip collecting – waste disposal or soil... – Nozzle cleaner – flusher or drainer
Patent
1997-07-01
1999-05-04
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
With cleaning means, drip collecting, waste disposal or soil...
Nozzle cleaner, flusher or drainer
239436, 239538, 2395871, B05B 1502, B05B 132
Patent
active
058993843
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a nozzle, preferably a nozzle for spray pipes, or to be more precise an improved nozzle for cleaning both supply pipes and the nozzle of impurities without cutting off the flow of fluid or using any form of external cleaning equipment.
The nozzle is especially designed for placing on a spray pipe in the processing industry, where it is important that the machinery is not brought to a standstill because of the cleaning of impurities from nozzles, but may also have other applications.
REVIEW OF RELATED TECHNOLOGY
The purpose of spray nozzles is to shape the fluid fed from a spray pipe into a desired jet and direct this toward the equipment which is to be cleaned or hosed down. As spraying fluid it is common to use spraying liquids which are not entirely free of impurities, such as metal particles, plastic particles, fibres of various kinds and so forth. Impurities of this kind can cause the nozzles to become blocked, and therefore expensive equipment for purifying the spraying liquid, such as spraying liquid filters, arc strainers, cleanable trunk pipes and so forth, is usually mounted in front of the nozzle.
Often, to save installation costs, cleaning equipment is not installed in front of the nozzles, and this results in the equipment having to be frequently dismantled and cleaned, which in turn may result in a shutdown of the machinery.
The reason that the nozzles become bunged up is that particles or aggregations of particles which are larger than the outlet orifice of the nozzle reach the outlet orifice. The impurities which come to a stop in the outlet orifice will then trap particles of various sizes and form a bung. This bung is not entirely liquid-tight and liquid can drain therethrough, whilst particles of various sizes are held back allowing the bung to grow inward in the pipe until the pipe gradually becomes completely blocked so that ultimately no more liquid passes through the pipe and the nozzle.
When using the most common spray nozzle types, cleaning takes place in that the fluid supply to the nozzle is cut off whereupon the nozzle is dismantled and cleaned manually of impurities. The fluid supply in the spray pipe is then turned on so that the bung which has built up in the spray pipe is flushed out. The liquid supply is then cut off again and the nozzle remounted, whereupon the liquid supply can be turned back on and the nozzle put into use again.
A procedure of this kind inevitably results in major interruptions of production in the machine/process for which the nozzles in question are installed, and in addition involves time-consuming and expensive maintenance of the machine/process.
Swedish Patent 463772 makes known a nozzle on a spray pipe for cleaning both the spray pipe and the nozzle, wherein there is disposed in the nozzle a turnable body through which there is a conical hole for forming spray jets, and also an external channel which permits the spraying liquid to be directed around the conical hole in order to flush the spray pipe.
During normal operations the turnable body is in a position such that the spraying liquid is conducted through the conical hole from the largest opening of the hole toward the smaller opening. When the spray pipe is to be cleaned, the turnable body is turned so that the spray jet is directed around the conical hole through the recess and out through an opening on the side of the nozzle. The conical hole can then be cleaned by turning the turnable body so that the spraying liquid is conducted through the conical hole in the reverse direction, so that accumulated impurities are flushed out. The turnable body is then turned back to the operative position, and the nozzle is once again ready for operation.
The advantage of this nozzle over the known fixed nozzles is that the spray pipe and the nozzle can be cleaned speedily without stopping the process--or only with a brief interruption thereof--without the spraying liquid pressure having to be cut off.
However, the nozzle according to Swedish Patent
REFERENCES:
patent: 3116882 (1964-01-01), Vork
patent: 3528611 (1970-09-01), Watson
patent: 4508268 (1985-04-01), Geberth
patent: 5154351 (1992-10-01), Takko
patent: 5715975 (1998-02-01), Stern et al.
Bandak A/S
Kashnikow Andres
O'Hanlon Sean P.
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