JPS6333602Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fuel supply device that supplies fuel oil to a ship's engine.

A conventional gravity tank T as shown in FIG. 1 is known as a gravity tank T provided between a bottom tank serving as a fuel oil tank of a ship and an engine for propulsion of the ship. That is, the gravity tank T receives fuel oil O sent from the bottom tank 1 by the oil transfer pump 2.
The fuel tank is mainly composed of a fuel chamber A filled with oil, and a float chamber B that communicates with the fuel chamber A and sends the fuel oil O to the engine E. The refueling chamber A of such a gravity tank T includes a pipe 4 provided with an outlet for the fuel oil O in close proximity to the inner wall 3 of the refueling chamber A, and a pipe 4 for distributing the fuel in the refueling chamber A. an overflow pipe 5 for keeping the amount of oil O below a certain amount; and an outlet for a drain D, which is provided at the bottom 6 of the oil supply chamber A and is a mixture of water and impurities in the fuel oil O in the oil supply chamber A. A drain outlet 7 and a drain discharge pipe 9 having a drain valve 8 and connected to the drain outlet 7 are provided in the float chamber B of the gravity tank T.
Float 10 that moves up and down depending on the amount of fuel oil O
A bellows 11 connected to the float 10 and extending and contracting in the vertical direction; a fuel oil O feed port 12 formed at the top of the bellows 11; and a fuel oil take-off valve 13 connected to the fuel oil feed port 12. The oil supply chamber A and the float chamber B are provided with a partition plate 15 and a stiffener for reinforcing the gravity tank attached to the lower part of the partition plate 15. 16, and at the bottom of the partition plate 15 there is an oil flow port 1 that connects the oil supply chamber A and the float chamber B.
7 are provided, and the fuel oil O in the bottom tank 1 is transferred to the oil transfer pump 2, the filling pipe 4, the oil supply chamber A, the oil flow port 17, the float chamber B, the oil feed port 12, and the oil feed pipe 14. It is designed to be sent to engine E via the engine. Although not shown in the drawings, the oil flow port 17 expands and contracts as air is supplied and discharged.
A flexible annular valve is provided for communicating and blocking the oil flow port 17.

Incidentally, the fuel oil O contains a mixture of water and impurities, and this mixture settles as a drain D at the bottom 6 of the fueling room A during the voyage. When the gravity tank T is rocked due to pitching or rolling of the hull, the drain D is diffused into the fuel oil O and is sent to the float chamber B and eventually to the engine E side, causing damage to the engine E side. There is a risk that the drain D may enter the oil feed pump or the like and wear out these oil-tight parts.

Conventionally, the drain valve 8 is opened from time to time to extract the drain D in the fuel chamber A from the drain outlet 7 together with the fuel oil O in the bottom 6 of the fuel chamber A. Although this prevents a large amount of sediment from settling, it is difficult to completely remove the drain D with a large specific gravity or the drain D stuck to the bottom of the oil supply chamber A from the drain outlet 7. During a ship inspection, a considerable amount of drain D is often found in the refueling room A.

This idea was made in consideration of the above circumstances, and includes a drain hole provided at the bottom of a gravity tank that has a refueling chamber and a float chamber that communicate with each other.
A bottom tank is connected to the drain discharge hole via a drain separation tank, and the bottom tank is connected to an oil supply pipe provided in the oil supply chamber of the gravity tank by a fuel supply pipe equipped with an oil transfer pump, A branch pipe with a stop valve is branched from the oil supply pipe and installed between the oil transfer pump and the filling pipe, and the fuel oil is directed into the gravity tank along the bottom of the gravity tank and toward the drain outlet. A spout for ejecting oil is provided in communication with the branch pipe, and an oil feed pipe is connected to the float chamber via a float.

This invention will be explained below with reference to the drawings.

2 and 3 show a first embodiment of this invention, and the same reference numerals as in FIG. 1 indicate the same constituent elements, and their explanation will be omitted. 20, 21, 2 in the diagram
Reference numerals 2 denote a lead-out pipe, a connecting pipe, and a coupling pipe that constitute a fuel supply pipe P that leads the fuel oil O in the bottom tank 1 to the gravity tank T, and the lead-out pipe 20 is connected to the bottom tank 1 via a stop valve 23 for oil transfer. The connecting pipe 21 is connected to the oil transfer pump 2.
and the stop valve 24, and the connecting pipe 2
2 communicates the stop valve 24 and the filling pipe 4.

A stop valve 25 is provided in the connecting pipe 21.
One end of a branch pipe 26 having a
The oil supply chamber A is exposed through the bottom 6 of the oil supply chamber A. Further, the other end of the branch pipe 26 is connected to an ejector 27 made of an annular pipe attached along the inner periphery of the bottom 6 of the oil supply chamber A, and the inner peripheral wall 27a of the ejector 27 is , the oil supply room A
An injection nozzle 30 is provided with an ejection port 29 for ejecting the fuel oil O guided by the branch pipe 26 and protrudes toward the drain outlet 28 provided at the center of the bottom of the fuel tank. Note that the diameter of the drain discharge hole 28 is set larger than the diameter of the drain outlet 7. The drain discharge hole 28 is connected to a drain separation tank 33 by a drain discharge pipe 32 having a drain valve 31, and the drain separation tank 33 is connected to the bottom tank 1 by a separation pipe 34. .

The drain separation tank 33 has a separation partition plate 35,
36, the introduction chamber 38, separation chamber 39, and discharge chamber 40 are partitioned into three chambers as shown in FIG. 39 and extraction chamber 40
are connected to each other at the upper part of each, while the drain discharge pipe 32 is connected to the upper part of the introduction chamber 38.
The separation pipe 34 is connected to the upper part of the discharge chamber 40. Further, the separation chamber 39 is divided into upper and lower parts by a separation plate 42 having communication ports 41, 41 and a separation plate 44 having a communication port 43.
It is divided into rooms.

Reference numeral 45 denotes a drain detection gauge made of a thick glass tube attached to the outside of the gravity tank T, vertically connecting the bottom of the side wall end of the oil supply chamber A to the center.

Next, the operation of the fuel supply system for a ship according to the invention configured as described above will be explained.

First, after closing the stop valve 25 and opening the stop valve 24, the oil transfer pump 2 is operated, and the fuel oil O in the bottom tank 1 is sent to the engine E via the gravity tank T, and the engine E is operated in the same manner as before. Let's go on a voyage. Then, from time to time, the amount of drain D in the oil supply chamber A is checked using the drain detection gauge 45, and when the amount of drain D increases, the drain D in the oil supply chamber A is removed using the procedure described below.

First, the drain valve 8 is opened to discharge the drain D from the drain discharge pipe 9. At this time, water in the oil supply chamber A and drain D having a small specific gravity are discharged from the discharge pipe 9. Next, the drain valve 8 is closed, the oil transfer pump 2 is stopped, and the stop valve 24 is closed. Then, the stop valve 25 is opened, the oil transfer pump 2 is operated again, and the fuel oil O is spouted from the spout 29. Next, open the drain valve 31. By the above operation, the drain D with a large specific gravity accumulated at the bottom of the oil supply chamber A and the drain D stuck to the bottom are removed from the spout 29.
The fuel oil O injected toward the drain discharge hole 28 moves to the drain discharge hole 28, and is discharged from the gravity tank T from the drain discharge hole 28.

In addition, the drain D and fuel oil O discharged from the gravity tank T as described above are transferred to the drain discharge pipe 32.
It is led to the drain separation tank 33 through the drain. Fuel oil O and drain D led to drain separation tank 33
The drain D enters the introduction chamber 38 and the separation chamber 39, and most of the drain D settles at the bottom of the introduction chamber 38 and the separation chamber 39.
The fuel oil O and a portion of the drain D that has not precipitated flow into the discharge chamber 40 through the flow ports 41 and 43. At this time, the drain D settles on the separation plates 42, 44 and the bottom of the discharge chamber 40. Subsequently, the fuel oil O in the upper part of the discharge chamber 40 flows into the bottom tank 1 through the separation pipe 34. In this way, the drain D in the fuel oil O is removed in the separation tank 33.

Figure 4 shows a second embodiment of the fuel supply system for ships according to this invention.
The same reference numerals as those shown in the figures indicate the same constituent elements, and the explanation thereof will be omitted. In the second embodiment, the gravity tank T is mainly a small-sized ship with a drain discharge device attached thereto. In this example, gravity tank T
The oil supply chamber A is formed smaller than the float chamber B,
A lower end 15a of the partition plate 15 is spaced from the bottom of the oil supply chamber A, and the oil supply chamber A and the float chamber B are communicated with each other at their respective bottoms. The floor plate 50 of the float chamber B is raised one step higher than the bottom 51 of the oil supply chamber A on the side near the oil supply chamber A, while the floor plate 50 is tilted upward as it moves away from the oil supply chamber A, and the upper end of this floor plate 50 A spout 29 is provided nearby, and a drain outlet 28 is provided below the partition plate 15. Further, a sliding plate 52 made of a plastic plate or the like is attached to the upper surface of the floor plate 50 by means of adhesive or the like, so that the drain D deposited on the sliding plate 52 can easily slide.

53 is the drain D accumulated in the oil supply chamber A.
This is a cover for a drain extraction manhole to remove water.

The fuel supply system in the ship of this example is such that when drain D accumulates in the float chamber B, the stop valve 24
is closed, the stop valve 25 is opened, fuel oil O is jetted out from the spout 29, and the drain valve 31 is opened. By the above operation, the drain D on the sliding plate 52 slides down the sliding plate 52 and exits the gravity tank T through the drain discharge hole 28. The drain D in the fuel supply chamber A may be removed by opening the lid 53 when the fuel oil O in the gravity tank T is drained.

Note that the sliding plate 52 as shown in the second embodiment
may be attached to the bottom of the fuel supply chamber A in the first embodiment, or may be attached to the entire bottom or inner surface of the gravity tank T. Further, in the first embodiment, two types of holes for discharging the drain D are provided, the drain outlet 7 and the drain outlet 28, but the drain outlet 7 can be omitted.

As explained above, the fuel supply system for a ship of this invention has a drain discharge hole provided at the bottom of a gravity tank having a fuel supply chamber and a float chamber that communicate with each other. The bottom tank is connected via the
The bottom tank is connected to a filling pipe provided in the oiling chamber of the gravity tank by a fueling pipe equipped with an oil transfer pump, and the oiling pipe has a stop valve between the oil transfer pump and the filling pipe. A branch pipe is attached to branch from the oil supply pipe, and a spout is provided in the gravity tank in communication with the branch pipe for spouting fuel oil along the bottom surface of the gravity tank and toward the drain discharge hole,
In addition, since the oil pipe is connected to the float chamber via the float, even if condensate sticks in the gravity tank or condensate with a large specific gravity settles, it will not flow out from the spout. The drained fuel oil can reliably flow into the drain discharge hole and remove the drain from the gravity tank. In addition, in the ship's fuel supply system of this invention, the fuel oil is used to flow the condensate accumulated in the gravity tank to the drain discharge hole, and the condensate can be easily discharged even while the engine is running during a voyage, so it can be used for a long period of time. Even during voyages, no condensate accumulates in the gravity tank.

Furthermore, in the fuel supply system of this invention, the drain discharge hole of the gravity tank is connected to the bottom tank via the drain separation tank, so that the fuel oil from which the drain has been removed by the drain separation tank can be returned to the bottom tank. Can be reused as is,
Therefore, fuel oil can be used without wasting any trouble.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a conventional drain discharge device for a gravity tank, Fig. 2 is an explanatory diagram showing a partial cross-section of a first embodiment of a fuel supply device for a ship according to this invention, and Fig. 3 is an explanatory diagram showing a drain discharge device for a conventional gravity tank. FIG. 4 is an enlarged sectional view of the drain separation tank of the same example, and is an explanatory view showing a main part of the second embodiment of the invention in cross section. T...Gravity tank, 1...Bottom tank, O...
Fuel oil, P... Fuel supply pipe, 25... Stop valve, 26... Branch pipe, 28... Drain discharge hole, 29... Spout port.

Claims (1)

[Scope of utility model registration request] A drain discharge hole 28 is provided at the bottom of the gravity tank T, which has an oil supply chamber A and a float chamber B that communicate with each other.
The bottom tank 1 is connected to the drain discharge hole 28 via a drain separation tank 33, and the bottom tank 1 is connected to a pipe 4 provided in the oil supply chamber A of the gravity tank T. A branch pipe 26 is connected to the oil supply pipe P equipped with the oil transfer pump 2 and has a stop valve 25 between the oil transfer pump 2 and the filling pipe 4 of the oil supply pipe P and is attached by branching from the oil supply pipe P. A spout 29 is provided in the gravity tank T to spout fuel oil O along the bottom surface of the gravity tank T and toward the drain discharge hole 28, and is connected to the branch pipe 26. 1. A fuel supply system for a ship, characterized in that an oil supply pipe 14 is connected via a float 10.