JPS6231602B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is a refueling system that does not have its own tank, by temporarily storing dirty fuel oil spilled from a filter separator and dirty oil mixed with water discharged from a water separator. This relates to a fuel sump tank whose purpose is to simultaneously remove impure solids from the stale oil.

In conventional oil supply systems of this kind, although the dirty oil storage tank plays an important role, its nature is that it is nothing more than a box for storing dirty oil, so it has little utility value, and its structure is just a box. Ta. On the other hand, since fuel is expensive, there is a need to equip the fuel supply system with a device that removes impurities, water, etc. mixed into the fuel, and regenerates it so that it can be used effectively.

This invention was made in view of the above circumstances,
By thinking of the dirty oil storage tank as a unit of the oil supply system and adding functions to fulfill its role organically, it is possible to reduce the amount of dirty oil spilled from the filter separator and water mixed in from the water separator. To provide a tank for storing dirty oil for fuel, which is characterized in that it is capable of temporarily storing dirty oil and the like and at the same time removing impure solid matter from the dirty oil.

Embodiments of the present invention will be described in detail below based on the drawings.

1 to 3 are a partially sectional front view, a plan view, and a side view showing an example of a dirty oil storage tank according to the present invention. In the figures, 1 is the tank body, and the inside thereof is oriented toward the center. It is divided into an upper chamber 3 and a lower chamber 4 by an inclined partition plate 2, and the upper chamber 3 and lower chamber 4 communicate with each other by a vertical overflow pipe 5 passing through the partition plate 2. At the same time, the inclined concentration area 3 at the bottom of the upper chamber 3 from the side of the overflow pipe 5
They are communicated via a thin tube 6 that hangs down toward a.

At the upper part of the upper chamber 3, there are provided a replenishment port 7 for replenishing fuel when pump priming or for replenishing excess oil, etc., and a pipe 8 for air suction and vapor discharge. The discharge pipe 8 is equipped with a gate valve 9. In addition, a drain port 10 is provided at the bottom of the upper chamber 3.
Further, the side of the upper chamber 3 is provided with a return oil supply port 11 from a filter separator (not shown), a suction port 12 to the suction side of the pump (not shown), and an air separator of the filter separator. Port 19 into which fuel vapor separated by
is provided.

Further, since the main function of the lower chamber 4 is to store impure solid matter in the fuel, it is formed to have a larger internal volume than the upper chamber 3, and like the upper chamber 3, it is formed in an inclined shape. A drain port 13 is provided at the bottom, and a port 14 is provided at the side to allow water-containing dirty oil discharged from the filter separator to flow therein.

Reference numerals 15 and 16 are an upper chamber liquid level gauge and a lower chamber liquid level gauge, which are used to observe the separation status and the amount of dirty oil in both chambers 3 and 4 from the outside. Also,
17 and 18 are an upper chamber inspection lid and a lower chamber inspection lid.

The operation of the dirty oil sump tank of the present invention constructed as described above will be explained.

When refueling work begins, the upper chamber 3 of the dirty oil storage tank
Air containing fuel vapor separated by a filter separator air separator flows into the chamber from port 19, return oil from the filter separator flows from return oil supply port 11, and a filter separator moisture separator flows into the lower chamber 4. Water containing the separated fuel flows in. The dirty oil accumulated in the upper chamber 3 is
Due to the difference in specific gravity, impure solids c, water b, and fuel a are separated from the bottom of the upper chamber 3 in this order, and are transferred to the upper overflow pipe 5 of the thin tube 6.
It is accumulated up to the connection point. When the amount of dirty oil flowing in exceeds the upper part of the thin pipe 6 and the connection part with the overflow pipe 5,
It overflows and flows from the capillary tube 6 into the lower chamber 4 through the overflow tube 5. At this time, since the lower end of the thin tube 6 is placed close to the bottom of the upper chamber 3, the impure solids c and water b flow into the lower chamber 4 first, and the relatively less contaminated fuel flows into the upper chamber 3. The remaining fuel is appropriately sucked into a refueling pump (not shown) through the suction port 12, passed through a filter separator, and then refueled into an aircraft or the like. The drain port 10 provided in the upper chamber 3 is used to properly remove impure solids c and water b accumulated in the inclined concentration area 3a before refueling, and to keep the inside of the upper chamber 3 clean. Incidentally, since most of what accumulates in the lower chamber 4 is impurities, it is appropriately discharged from the drain port 13. The air suction and vapor discharge pipe 8 provided at the upper part of the tank upper chamber 3 is connected to the upper chamber 3.
This is provided to prevent the tank from being destroyed due to positive pressure being applied to the lower chamber 4 during refueling operations or negative pressure being applied when fuel is sucked by the pump from the suction port 12. In addition, the gate valve 9 installed in the middle of the air suction and vapor discharge pipe 8 is kept open at all times for the reasons mentioned above, but when there is a risk of fuel spilling, such as when moving this device, Closed. The overflow pipe 5 connects the upper chamber 3 and the lower chamber 4.
In order to eliminate the pressure difference between the two chambers when fuel enters and exits the chamber, and at the same time, if for some reason fuel that exceeds the flow rate of the thin tube flows into the upper chamber 3, it is released to the lower chamber 4 before overflowing to the outside. It is provided.

In the above embodiment, the partition plate 2 is formed in an inclined shape concentrating toward the center thereof, and this concentrated portion 3
Although the case is shown in which the tip of the thin tube 6 is disposed at the part a, the structure is not necessarily limited to this, and the partition plate 2 is inclined to one side, and the lower concentrated part 3a is arranged.
It goes without saying that the structure may be such that the tip of the thin tube 6 is disposed at the tip.

As explained above, according to the dirty oil sump tank of the present invention, the upper chamber and the lower chamber separated by the partition plate are communicated with each other by the overflow pipe, and
Since the overflow pipe is connected to the bottom of the upper chamber 3 through a thin tube that hangs down from the side thereof, it is possible to separate water and impure solids in the dirty fuel oil supplied into the upper chamber 3 from the fuel. The effect is obtained that the impure solids can be discharged into the lower chamber through the capillary tube and a part of the overflow tube and discharged from the lower chamber to the outside by using the hydraulic pressure of the dirty oil. There is no need to separately equip the oil supply system with equipment such as a dirty oil separator, and the entire oil supply system can be made smaller and cheaper, and excellent effects such as maintenance and inspection can be achieved. Therefore, its utility value is remarkable.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a part of the dirty oil storage tank of the present invention in cross section, FIGS. 2 and 3 are its plan view and side view, respectively, and FIG. 4 is the dirty oil separated state of the tank of the present invention. FIG. In the figure, 1...tank body, 2...partition plate, 3...upper chamber, 3a...inclined concentration area, 4...
... lower chamber, 5 ... overflow pipe, 6 ... thin tube, 7 ... supply port, 10, 13, ... drain port, 11 ...
Return oil supply port, 12... is a suction port.

Claims (1)

[Claims] 1. The tank body is divided into an upper chamber and a lower chamber by a partition plate, and these two chambers are communicated through an overflow pipe, and the upper chamber is connected from the side of the overflow pipe. It is connected through a thin tube that hangs down toward the bottom, and separates the water and impure solids in the dirty oil supplied into the upper chamber based on the difference in specific gravity, and also uses the hydraulic pressure of the dirty oil. A dirty oil sump tank characterized in that impure solids are discharged into the lower chamber through a thin tube and a part of an overflow tube. 2. The dirty oil storage tank according to claim 1, wherein the bottom surface of the upper chamber is formed in an inclined shape concentrating on one place, and the tips of the thin tubes are disposed at this concentrated area.