Fluid sprinkling – spraying – and diffusing – With cleaning means – drip collecting – waste disposal or soil... – Nozzle cleaner – flusher or drainer
Patent
1995-12-08
1998-09-08
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
With cleaning means, drip collecting, waste disposal or soil...
Nozzle cleaner, flusher or drainer
239455, B05B 1502
Patent
active
058033645
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION AND PRIOR ART
This invention is related to a nozzle device comprising a nozzle having an outlet, an inlet and a passage extending between the inlet and outlet. The nozzle has, preferably, the character of a jet tube.
The nozzle device according to the invention is generally applicable to all kinds of spray systems where one wishes to spray a liquid for different purposes. The device according to the invention is intended to avoid the serious problem which is caused by tendency to clogging of the liquid passage of the nozzle device.
A particularly preferred application of the nozzle device according to the invention is within fibre processing industries, in particular the paper and cellulose industry. On cleaning of filters within the paper and cellulose industry, one uses water spraying of the filters. The water is then conveyed through a tube, at the end of which a nozzle device is arranged. This nozzle device sprays the water against the filter in a spray stream, which suitable is plate shaped, so as to remove the pulp fibres from the filter.
The water used is per se filtered but contains as a rule some proportion of fibres or other particles tending to clog the passage through the nozzle device. The result is that the water spraying of the filters ceases. In order to clean the nozzle devices, one has to shut off the water supply to the same and dismount the nozzle devices for cleaning. Thereafter the nozzle devices may again be put into place. The disadvantage of these activities is that they require a considerable time and effort and, furthermore, the production is disturbed.
In order to enable cleaning of the nozzle devices during operations, it has been proposed in the Swedish patent No. 463 772 to design the passage in a member which is rotatable in a body of the nozzle device, which enables the passage to be caused, by rotation, to receive a flow of water in the backwards direction. However, the cleaning function in this known embodiment is far from satisfactory apart from the fact that the support of the rotatable member causes a substantial amount of constructive problems.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a nozzle device combining a structurally simple embodiment with an excellent cleaning effect without need for dismounting of the nozzle device. Although the nozzle device in the preferred case is intended for use within the paper and cellulose industry, it is generally applicable in all such connections where nozzles tend to be clogged during operation and where an efficient cleaning function is desired.
The object of the invention is fulfilled by the passage of the nozzle being defined by at least two parts, which are movable relative to each other and arranged to be able to be moved away from each other by relative movement so as to widen the passage.
The solution according to the invention gives rise to an excellent cleaning effect by means of opening or widening of the passage. Possible contaminations deposited in the passage loosen readily and are transported away by the liquid flowing by.
Preferable developments of the invention are defined in the dependent claims.
It is particularly advantageous to make nozzle devices according to the invention form part of a system where one automatically and continuously carries out repeated cleaning actions of the different nozzles by moving their parts defining the passages away from each other, the cleaning times being possible to control by timers or some pressure sensing arrangement, which on reaching of a certain pressure upstreams of the nozzle devices, said pressure indicating clogging of the nozzles, initiates the cleaning actions. Accordingly, interruptions in operation are eliminated, the need for surveillance is reduced, the production is increased and a better profitability is achieved. However, it is also possible to design the nozzle device according to the invention so that it is intended to be manually operated by surveying personal for the purpose of cleaning.
SHORT
REFERENCES:
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patent: 2484628 (1949-10-01), Valley
patent: 2593357 (1952-04-01), Spooner
patent: 3936002 (1976-02-01), Geberth, Jr.
patent: 4220286 (1980-09-01), Geberth, Jr.
patent: 4250211 (1981-02-01), Damrau et al.
patent: 4269355 (1981-05-01), Geberth, Jr.
Ganey Steven J.
Kashnikow Andres
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