Marine propulsion – Means for accomodating or moving engine fluids – Cooling for engine
Patent
1996-11-08
1998-11-10
Basinger, Sherman
Marine propulsion
Means for accomodating or moving engine fluids
Cooling for engine
114270, B63H 2138
Patent
active
058335030
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a bottom well and sea water piping system for vessels with which system the supply of sea water is provided for a vessel for both cooling water and other use. A bottom well and sea water piping system for vessels comprises a bottom well, pumps, filters, motors of the pumps with a frequency converter, an inlet and an outlet piping with associated equipments, and regulating devices.
BACKGROUND
Bottom wells are conventionally arranged on the vessel's boards in such a manner that part of the well is on the bottom side and part of the intake opening on the board side. Conventional bottom wells are naturally arranged below the water level in such a manner that all the water intake openings are below the water line. Bottom wells on both boards are most often connected by a common suction piping. A connecting suction pipe is arranged below the water level and it acts as a bypass manifold to which pumps are connected. Filters are also arranged on the suction pipe.
The greatest drawback of the conventionally used bottom well systems for vessels has been that the system is almost completely located below the water level. In that case there is always a risk in connection with disturbances and damages that water will gain access to the vessel's inner parts. Conventional bottom well and sea water piping systems normally have several pipe connections to the bottom well below the sea level. One or more suction pipes are connected to the bottom well. Furthermore, a return pipe for warmed water, an air pipe, possible lead-throughs required by compressed air or vapour blasting and lead-throughs of a heating spiral are also connected to the bottom well. It is clear that the above-mentioned lead-throughs arranged below the water level will always be risky. In northern conditions, in particular, bottom wells arranged on the boards are not a very good solution because ice and ice sludge in the sea will often prevent the water intake from the bottom well. It has also been problematic that conventional bottom wells are placed in the most crammed place on a vessel, that is, in the forebody of the engine room. The two bottom wells there and the piping connecting them take an inconsiderably large space. Also, filters and the necessary pumps have often been a problem with regard to their logical placing.
Conventional bottom well and sea water piping systems have also been problematic for users since bottom wells easily accumulate air and ice because of the position of the wells. The removal of ice requires additional heating and attending to the heating. Air causes malfunctions in the pumps and as ice accumulates in the bottom well or the filters, the flow of cooling water is prevented.
SUMMARY OF THE INVENTION
The bottom well and sea water piping system for vessels according to the invention eliminates the above-mentioned drawbacks and it is reliable and user-friendly. The bottom well and sea water piping system for vessels according to the invention is characterized by what is described below in the characterizing part of claims.
The greatest advantages of the bottom well and sea water piping system for vessels according to the invention will thus be the improvement of security and the lowering of the total cost. All parts of the system, piping as well as the openings in connection with the bottom well, are arranged above the sea level so that water will not gain access to the vessel's inner parts in cases of piping or other damages. The bottom well of the invention is in the vessel's midship, whereby it is possible to accomplish advantageous device and piping arrangements, which will essentially reduce the number of pipes, for example. Neither is it necessary to lay pipes transversely in the system of the invention. The position of the bottom well of the invention in the midship prevents air from entering the well, and a very slow flow in the bottom openings will not easily draw bay ice in with them. Furthermore, there is very little ice in the bottom well situated on the vesse
REFERENCES:
patent: 1641670 (1927-09-01), French
patent: 2350598 (1944-06-01), Faville
patent: 3662701 (1972-05-01), Cobb
patent: 5289793 (1994-03-01), Aker
Finnish Official Action for Finnish Patent Application No. 942557, filed Jul. 4, 1995, Inventor: Jaakko Juhani KALLIO; and English translation of the Finnish Official Action dated Apr. 25, 1995.
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