WO1983001200A1

WO1983001200A1 - Trough-like collar for the upper external rim of fuel reservoirs for cooling thereof

Info

Publication number: WO1983001200A1
Application number: PCT/BR1982/000014
Authority: WO
Inventors: Pesquizas E Invençoes Ucerpo S/A. Idéias
Original assignee: Sobrinho, Luiz, Cocozza
Priority date: 1981-10-01
Filing date: 1982-10-01
Publication date: 1983-04-14
Also published as: EP0090828A1; BR6101373U

Abstract

A trough-like collar (2) applied to the upper external rim of a fuel reservoir (1) for cooling thereof results from a plate member which is made to surround the top of the fuel reservoir (1) to form a ring. The plate member is riveted or welded at its lower portion to the reservoir wall and projects therefrom at its upper portion thus forming an empty space to be filled with water.

Description

TROUGH-LIKE COLLAR FOR THE. UPPER EXTERNAL RIM OF FUEL RESERVOIRS FOR COOLING THEREOF

The present invention refers to a collar, in the form of a trough, which is applied to the upper external rim of a fuel reservoir resulting in an annular water reservoir which circumscribes the whole diameter of the. fuel reservoir.

In case of fires in fuel reservoirs, the highest temperatures are found in the plates forming the upper rims of the reservoirs since it is there that the evaporated fuel feeds the fire upon contacting the oxygen in the air. The heat produced raises the fuel temperature beyond the boiling point. There is also the overheating of the rim -forming plates which results in a reduction in their resistence, to the extent that they fold one on top of the other, so that the whole reservoir is destroyed.

The main use of the trough-like collar of the present invention is, in case of fire in the fuel reservoir, to maintain the. upper reservoir plate in direct contact with the cold water stored therein, thus avoiding higher temperature elevations.

Another useful application of the present invention is in the daily handling of fuel into the reservoir. Since the fuel to be stored in the reservoir most of the times arrives in a hot state, a ready cooling thereof caused by the water in the trough diminishes the fuel losses resulting from evaporation. The invention is also useful for cooling products of a toxic content which are stored in reservoirs, thus avoiding the risk of accidents caused by overheating of said products. The trough-like collar of the present invention may have perforations or serriform grooves in the upper section thereof to allow the excess water flow downward on the external reservoir walls which results in uniform cooling of the reservoir contents and better utilization of the water used. The water used may be partiall recovered if another trough is adapted around the reservoir next to its base.

In the accompanying drawings, Figure 1 shows a fuel reservoir to which a trough-like collar has been applied. In order to clarify the operation of the invention, the parts which form it are indicated by reference numerals: 1-fuel reservoir; 2-trough-like collar; 3-serriform grooves in the upper rim of the trough-like collar; 4-overflow holes on the trough-like collar; 5-inlet tube for the water; 6-upward rising tube; 7-water distribution pipe; 8-feeding terminal between the reseivoir wall and the trough-like collar; 9-water-jet; 10-water stored between the trough-like collar and the reservoir wall; 11-upper reservoir rim.

Figure 2 shows in detail the trough-like collar 2 full of water 10, being fed by a water jet 9 which sprays water from both sides of the upper end of distribution pipe 7. A uniform volume of water must be flowing through serriform grooves 3 and overflow holes 4 in order to maintain the reservoir external walls completely wet.

The upper rim 11 of the reservoir stands higher than the serriform edge of the trough 2, and the difference in height between the two must be only enough to encompass the eddying effect and the height of the waves produced by force feeding the water.

In a variant of the present invention, it may be a walkway disposed around the top of a fuel reservoir and serving also as a reinforcement therefor, said walkway being inclined outwardly and storing a certain amount of water, and in order to be less slippery it is perforated all around to allow drainage of rain water; in case of fires, it can be filled in by the firemen's hoses so that the same effect of the trough-like collar is produced.

Claims

1. A Trough-like collar applied to the upper external rim of a fuel reservoir for cooling thereof characterized by enclosing a water ring next to the upper external reservoir rim.

2. A Trough-like collar applied to the upper external rim of a fuel reservoir for cooling thereof as claimed in claim 1, characterized by being provided with serriform grooves all around its upper section or being provided throughout all its diameter with overflow holes, or both, for maintaining a water ring next to the upper external reservoir rim and for having the excess water flow uniformly through the reservoir's external walls so as to maintain the latter wet from top to bottom and thus assure a good cooling effect.

3. A Trough-like collar applied to the upper external rim of a fuel reservoir for cooling thereof, as claimed in claim 1, characterized in that it may be a walkway disposed around the top of the fuel reservoir and serving also as a reinforcement therefor, said walkway being inclined outwardly and storing a certain amount of water, and in order to be less slippery it is perforated all around to allow drainage of rain water; in case of fires, it can be filled in by the firemen's hoses so that the same effect of the trough-like collar is produced.