JPS6010955B2 - Refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling device for refueling a vehicle or the like, and particularly to a refueling device that prevents air from being supplied together with oil.

In conventional oil supply systems, when air is sucked in, it is led to a foam-like air separation device through a furnace sieve chamber installed on the discharge side of the pump, where it is separated from the air. The oil is separated from the liquid and air is prevented from being supplied to the vehicle due to the presence of oil, but if there is a large amount of air, for example, the underground tank may be refueled without realizing it is empty, or If air is sucked in from the saddle between the piping on the suction side of the pump, the capacity of the air separation device will be exceeded, and the air will pass through the flow meter and be discharged from the refueling nozzle, so the air will not be sold to the customer. This caused inconvenience. An object of the present invention is to provide a refueling device that eliminates the above-mentioned disadvantages, and its configuration is such that a float that moves up and down according to the liquid level is provided in the filter chamber of an air separation device, and the oil supply device operates in conjunction with the float. By opening and closing the passage leading to the supply nozzle using a shutoff valve, when air is inhaled, the passage is closed;
This feature is characterized in that air is prevented from being discharged from the refueling nozzle.

An embodiment of the oil supply device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross section of the entire oil supply system. In the figure, the main body 1 of the fuel supply system is equipped with a pump 2, which is driven by a drive motor 3 to be installed underground or above ground. The oil can be sucked up from the tank 4.

The discharge side of the pump 2 is connected to a furnace filtration device 5, and the furnace filtration device 5 is passed through an air separation device 6 and a passage 7, and further passes through a flow meter 8, a refueling hose 9, and a refueling nozzle 10'. , oil liquid is discharged from the oil supply nozzle 10.
Further, the oil supply device main body 1 is provided with a display device 11 that displays the amount of oil flowing through the flow meter 8. FIG. 2 shows an enlarged cross section of the filtration device 5 and the air separation device 6.

The filtration device 5 is provided with a filter 5b in the filtration chamber 5a, and is configured to send oil from which dust has been removed to a passage 12 leading to an oil supply nozzle 10. On the other hand, the air separation device 6 includes a gas-liquid separation chamber 6a, a float 6b and a valve 6c in the chamber 6a, and when liquid accumulates, the float 6b floats up and connects the valve 6c, and the gas-liquid separation chamber 6
The oil liquid is returned to the suction side of the pump 2 through a passage 6d extending from the lower side of the pump 2 to the suction side of the pump 2. The air is then released into the atmosphere from the air release pipe 6e. As mentioned above, the furnace chamber 5a and the gas-liquid separation chamber 6a
The passage 7 passes through the passage 7, so that the oil mixed with the air in the furnace chamber 5a passes through the passage 7 and enters the gas-liquid separation chamber 6a. Under the above-mentioned configuration, there is a pipe in the furnace chamber 5a that moves up and down depending on the liquid level in the furnace chamber 5a.

The seat 13 is attached to one end of the arm 14. Arm 14
is pivotally supported around a fulcrum 14a, and a cutoff valve 15 is provided at the end of the arm 14 facing the passage 12.
is installed. The float 13 is heavier than the cutoff valve 15, and the buoyancy of the float 13 is larger than that of the cutoff valve 15. Therefore, when the furnace chamber 5a is filled with oil, the float 13 floats up and the shutoff valve 15 is engaged, and when the liquid level falls, the float 13 descends and the shutoff valve 15 closes the passage 15. It is now open to the public. In the oil supply system having the above configuration, when the tank 4 becomes empty or when a large amount of air is sucked into the pump 2 from the pump suction side, air accumulates in the upper part of the furnace chamber 5a. As the liquid level falls, the float 13 lowers and the isolation valve 15 opens the passage 12. (See Figure 3) Therefore, air is not discharged from the oil supply nozzle 10 through the passage 12, and the flow of oil through the passage 12 is stopped, so the flow meter 8 and the display device 11 also operate. There is no possibility that the second phenomenon will occur, which would result in selling air to the customer. Note that the air in the furnace chamber 5a flows into the gas-liquid separation chamber 6a through the passage 7, and is discharged to the atmosphere from the air release pipe 6e. In addition, if a small amount of air is mixed in that does not lower the liquid level in the furnace chamber 5a, the passage 123 remains open, but in this case, the conventional function The air is separated from the oil and is discharged to the outside from the air relief pipe 6e.

FIG. 4 shows another embodiment of the present invention, in which present invention 3 is applied to a ceiling-suspended oil supply device.

Components designated by the same numbers have the same configurations as those of the above-mentioned embodiment, and 16 is a pump unit, 17 is a transmitting device interlocked with the flow meter 8, and 18 is a display device provided at an easily visible position such as a high place at a gas station. In addition, in the above embodiment, a swinging structure using the arm 12 was adopted, but a fulcrum could be set at one end of the arm, and a float and a shutoff valve positioned in the opposite direction to that of the embodiment could be provided at the other end. It is of course possible to change the design to a different structure, but the point is that the float captures the fluctuations in the liquid level in the furnace chamber 5a due to air infiltration, and the movement of the shutoff valve mechanically responds to the up and down movements of the float. It is sufficient if the liquid passage can be opened and closed. Furthermore, in the above embodiment, the furnace filtration device and the air separation device are separate units, but the air separation device is provided within the furnace filtration device, that is, the capacity of the furnace filtration chamber is increased. Air and oil may be separated above the furnace chamber.

Since the present invention has the above configuration and operation,
It has the following various effects.

W If a large amount of air is sucked in, for example, if the pump operates even though the underground or above-ground tank is empty, the shutoff valve closes the passage leading to the refueling nozzle, causing air to be discharged from the refueling nozzle. Since the flow meter is not used for measurement, it is possible to prevent a situation where air is sold to a customer.

{〇ー If the check valve on the pump suction side is defective, the oil from the pump will fall into the underground tawak at night, so we sometimes had to measure the air when refueling first thing in the morning.
This is improved by adopting the configuration of the present invention.

1. Since it is only necessary to add a simple mechanism to the conventional air separation device, the problems of the conventional device can be solved without major changes to the structure of the conventional device, which is practical.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall front view with a partial cross section of the oil supply system according to the present invention, and FIG. 2 is an enlarged cross section of the furnace filtration device and air separation layer shown in FIG. 1. FIG. 3 is a sectional view of FIG. 2 in which the passage leading to the refueling nozzle is in the open state, and FIG. 4 is another embodiment of the present invention. FIG. 2 is a schematic diagram illustrating an example.

The meanings of the symbols in the diagram are as follows. 1... Oil supply device body, 2... Pump, 4... Tank, 5... Furnace filtration device, 6... Air separation device , 13...fu.

15...Shutoff valve. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 A float that moves up and down according to the liquid level is provided in the filtration chamber, and a cutoff valve that can be opened and closed is provided in the passage leading from the filtration chamber to the refueling nozzle, and the cutoff valve is opened and lowered when the float rises. A refueling device characterized in that the refueling device is interlocked with the float so as to be closed at times.