JPS5952119B2 - Refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a refueling system equipped with an air separation device.

Conventionally, there are the following oil supply devices equipped with an air separation device that separates oil from air mixed in the oil.

That is, a filtration chamber is formed in the flow path of the oil supply piping system from the pump that pumps up the oil liquid from the storage tank to the oil supply nozzle, and air mixed in the oil liquid is extracted in the filtration chamber as foam along with a small amount of oil liquid. The foam is guided through a communication path to an air separation tank 1, where it is completely separated into oil and air.

By the way, in order to prevent various inconveniences caused by the oil flowing through the filtration chamber flowing into the air separation tank through the communication path, the communication passage is designed to have a small diameter to reduce the opening area on the filtration chamber side. It's small.

In other words, if this opening area is made large, most of the oil that should flow to the refueling nozzle will flow to the air separation tank, reducing the amount of oil discharged from the refueling nozzle. Separation from the air is not performed normally, resulting in inconveniences such as the need to increase the volume of the air separation tank.

However, if the diameter of the communication passage is made small and the opening area is made small, when a large amount of air is mixed into the oil liquid, it becomes impossible to lead all the generated bubbles to the air separation tank, and the air cannot be separated. However, there was a drawback that the so-called separation efficiency deteriorated.

The present invention solves the above-mentioned drawbacks, and includes adjusting the opening area of the communication passage on the side of the flow chamber in accordance with the amount of bubbles generated (the amount of air mixed in the oil liquid). The present invention provides a characteristic oil supply device.

An embodiment in which the present invention is applied to a ground-mounted refueling device will be described below with reference to the drawings.

In FIG. 1, a motor 2 and a pump 3 driven by the motor 2 are installed in a main body 1 of the oil supply device.
A suction pipe 5 extending from an underground storage tank 4 is connected to the suction port.

A discharge pipe 6 is connected to the discharge port of the pump 3.
The tip thereof is connected to a refueling nozzle 8 via a refueling hose 7 extending outside the main body 1.

In addition, the discharge pipe 6 has a flow meter 10 interlocked with a flow rate display meter 9.
is connected.

As shown in detail in FIGS. 2 and 3, a flow chamber 11 is formed in the flow path of the discharge pipe 6 between the pump 3 and the flow meter 10. The air in the oil is extracted as bubbles along with a small amount of the oil by the filter element 12 housed therein.

Further, an air separation tank 13 is housed in the main body 1 adjacent to the filtration chamber 1, and the air separation tank 3 is connected to the filtration chamber 11 through a communication passage 14 having a larger diameter than the conventional one. It is also connected to the suction pipe 5 by a return pipe 15.

A float 17 that is movable up and down guided by a guide 16 is housed in the air separation tank 13, and the opening of the return pipe 15 can be opened and closed by a valve body 18 fixed to the float 17.

This air separation tank 13 completely separates the foamy oil liquid sent through the communication path 14 into air and oil liquid, and the separated air is released to the atmosphere through a discharge pipe 19, for example. , and the separated oil liquid is transferred to the air separation tank 13 up to a predetermined amount.
stored in

When the oil reaches a predetermined level, the valve body 18 opens the return pipe 15 due to the downward movement of the flow 17, and the separated oil flows back to the suction pipe 5.

On the other hand, in the upper part of the filtration chamber 11, a communication hole 20a is provided downwardly.
An air reservoir chamber 20 is formed, and the foamy oil liquid is collected in the air reservoir chamber 20.

An opening 14 a of the communication passage 14 on the filtration chamber 11 side is connected to the air reservoir chamber 20 at a position above the communication hole 208 .

Further, a float 21 is housed in the filtration chamber 11 and moves up and down according to the oil level in the filtration chamber 11, and the float 21 has a control valve that loosely fits through the communication hole 208. The control valve 22 also moves up and down in accordance with the up and down movement of the float 21.

Reference numeral 23 in the figure denotes a collar that restricts downward movement of the float 21 by more than a predetermined amount.

The control valve 22 adjusts the opening area of the opening 148, and as shown in FIG.
is formed.

The thin tube 24 has the same diameter as the conventional communication path.

In the above configuration, when the amount of air mixed in the oil is small, the filtration chamber 11 is filled with the oil and the control valve 22 is seated on the periphery of the opening 148.

At this time, the foamy oil collected in the air reservoir chamber through the communication hole 208 is led to the air separation tank 13 through the thin tube 24,
Processed as described above.

In this state, the opening area of the communication passage 14 is the same as the cross-sectional area of the thin tube 24, that is, that of the conventional communication passage (the gap area when the control valve 22 penetrates the communication hole 208 is that of the thin tube 24). Since it is extremely small, ? Filtration chamber 1
The oil passing through 1 flows toward the flow meter 10 without passing through the thin tube 24.

If there is a large amount of air mixed in the oil, the amount of bubbles generated will increase, and the oil level in the filtration chamber 11 will fall, as shown in FIG. Ru.

At this time, the control valve 22 is separated from the periphery of the opening 14a, and the thin tube 24 directly faces the i-filtration chamber 11, and the opening area of the opening 148 is the sum of the flow path area of the thin tube 24 and the gap area of the communication hole 20a. It becomes big.

Therefore, all the foamy oil liquid generated in large quantities is removed from the air separation tank 13.
The separation efficiency will not deteriorate.

Further, at this time, since the oil level is falling, a large amount of the oil itself does not flow into the air separation tank 13, and the normal operation of the air separation tank 13 is not hindered.

FIG. 4 shows a second embodiment of the present invention, in which the control valve 22
' is a tapered needle valve.

In this embodiment, depending on the amount of bubbles generated (control valve 22
The opening area of the opening 148 can be adjusted steplessly (according to the vertical movement of the opening 148).

FIG. 5 shows a third embodiment of the present invention, in which the control valve 22
'', the thin tube 24 is eliminated and a bypass tube 25 having the same diameter as the thin tube 24 that communicates the air reservoir chamber 20 and the communication path 14 is provided instead.

In each of the above embodiments, the control valve 22. 22', 22''
The explanation has been given of a case in which the flow rate is fixed to and interlocked with flows 1 to 21, but any interlocking method may be used as long as the opening area of the opening 148 is increased when flows 1 to 21 descend. good.

Further, the air reservoir chamber 20 is not necessarily required.

Of course, the present invention can also be applied to a suspended type oil supply device.

As described above, the present invention is capable of adjusting the opening area on the filtration chamber side of the communication passage connecting the air separation tank and the filtration chamber according to the amount of air mixed into the oil liquid. All of the foamed oil produced in the chamber can be led to the air separation tank for treatment, and separation efficiency can always be maintained at its best.

In addition, since the opening area is set to the minimum necessary according to the amount of foamy oil that is generated, the oil in the filtration chamber will not directly flow into the air separation tank, preventing its normal operation from being interfered with, or preventing the oil from flowing into the air separation tank. There is no need to make the volume larger than before.

Furthermore, even if there is a large amount of air mixed in and only air is sent from the pump, this air is discharged to the atmosphere etc. from the discharge pipe of the air separation tank through the communication passage with a large opening area. As a result, only a small amount of air is sent to the flow meter, so the flow meter does not rotate, and the amount of air is not added to the flow rate display meter as the amount of oil supplied.

Furthermore, a float is provided in the flow chamber and the flow 1
Since it has a simple structure of providing a control valve that works with ~,
It has various advantages, such as being easily implemented without major changes to conventional specifications.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the oil supply device according to the present invention, FIG.
FIG. 3 is an enlarged cross-sectional view of the main parts showing the inside of the filtration chamber depending on the amount of air in the oil liquid, FIG. 4 is a zoom diagram showing the control valve part according to the second embodiment of the present invention, and FIG. FIG. 3 is a diagram showing a control valve portion according to a third embodiment of the present invention. 3...Pump, 4...Storage tank, 5
...Discharge pipe (lubrication piping system), 8...Refueling nozzle, 1o...Flowmeter, 11...
Filtration chamber, 13... Air separation tank, 14...
・Communication path, 21...Float, 22, 22',
22”...Control valve.

Claims (1)

[Claims] 1. In a refueling device that uses a pump to pump up oil in a storage tank and supplies the pumped oil through a flowmeter and a refueling nozzle, a flow path of a refueling piping system that connects the pump and the flowmeter. A filtration chamber is formed therein, a communication path is provided to communicate the offshore filtration chamber and the air separation tank, and the filtration chamber is provided with a float that moves up and down according to the oil level, and as the float descends, An oil supply device characterized in that a control valve is provided in conjunction with the float to adjust the opening area of the communication passage so as to increase the opening area.