JPH072518B2 - Gas station - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a gas station for supplying gasoline to an automobile or the like.

[Conventional technology]

Such a gas station stores gasoline for fueling automobiles and the like in an oil storage tank buried underground, and supplies gasoline from a lorry tank to this oil storage tank.

By the way, when replenishing gasoline from such a tank truck, it is not possible to directly visually confirm that the tank is full due to the fact that the tank is underground. For this reason, conventionally, for example, a liquid level gauge is provided in an underground tank, and its display unit is installed on the ground so that the oil tank can be fully filled.

[Problems to be solved by the invention]

However, with the conventional method, it is only possible to know that the oil storage tank is full, so even if this is known, the discharge of oil from the tank truck must be stopped immediately to communicate with the oil storage tank and There is a risk that oil will overflow from the water detection port, air vent, etc. that are open to the outside, which may cause a fire and is extremely dangerous.

The object of the present invention is to eliminate the inconvenience of the above-mentioned conventional example, to reliably prevent oil overflow when the oil tank is full and to ensure safety when replenishing oil from the tank truck to the oil tank. Moreover, it is to provide a gas station with a simple structure.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a branch pipe for connecting a vapor return pipe to a tanker tank in the middle of an air vent started from an underground oil storage tank, and a valve that closes when the oil storage tank becomes full in the branch pipe. The purpose is to provide the.

[Action]

According to the present invention, the valve provided on the branch pipe for connecting the vapor return pipe to the lorry tank is closed when the oil storage tank is full, so that the lorry tank is sent together with gasoline vapor from the oil storage tank through the branch pipe. As a result, the supply of air was cut off, and as a result, the inside of the lorry tank became a negative pressure and further discharge of oil to the oil storage tank was stopped.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional front view showing an embodiment of a fueling station of the present invention, and FIG. 2 is a vertical sectional front view of a branch pipe for connecting a vapor return pipe, which is a main part of the same, in which 1 is a building and refueling. Place A
This is the case where it is installed on the first floor of this building 1.

A gasoline refueling machine 2 was erected on the floor of the gas station A, and an oil storage tank 3 was installed underground. A plurality of oil storage tanks 3 are provided for different oil types.

Each oil storage tank 3 is provided with a lubrication pipe 6 connected to the lubrication pipe 5 of the lorry tank 4, a water detection port 7, and an electronic oil level gauge 8. The lubrication pipe 5 is connected to the lubrication pipe 6 at the connecting portion. The electronic level gauge 8 is provided with a connection sensor 9 for detecting and outputting the level when connected, and a liquid level sensor 10 for detecting and outputting the level when the oil storage tank 3 is full.

Further, the air vent 11 is started up from the oil storage tank 3 and the air vent 11 is connected to the exhaust duct 16 opening to the outside of the building 1. A branch pipe 13 for connecting the vapor return pipe 12 to the lorry tank 4 is formed in the middle of the air vent 11, and the branch pipe 13 is closed when the output of the liquid level sensor 10 is received and the oil storage tank 3 becomes full. A solenoid valve 14 is provided.

Reference numeral 15 in the figure denotes a voice generator provided on the wall of the gas station A or the like.

In this way, as shown in the block diagram of FIG. 3, connection sensors 9, 9 ', 9 "provided for each oil storage tank 3, 3', 3" ...
Then, the connection signals from the liquid level sensors 10, 10 ', 10 "and the full signal are introduced into the solenoid valves 14, 14', 14" and the voice generator 15.

Next, the usage and operation will be described. To replenish oil from the tank truck 4 to the oil storage tank 3, the oil supply pipe 5 is connected to the oil supply pipe 6, and the vapor return pipe 12 is connected to the connecting branch pipe 13.
Connect to. When the oil supply pipe 5 and the oil supply pipe 6 are connected, the output from the connection sensor 9 to the solenoid valve 14 and the voice generator 15
Is opened, and the type of oil stored in the oil storage tank 3 to which the oil supply pipe of the tank truck 4 is connected is uttered, for example, “regular” from the voice generator 15, and the tank truck 4 is opened.
It is urged to confirm whether or not the oil in the oil storage tank 3 is of the same type. At this time, if the oil supply pipe 5 is connected to an oil storage tank of an oil different from the oil of the tank truck 4, for example, the oil supply pipe of 3 ', the type of oil in the oil storage tank 3', for example, "high-octane" is uttered by the voicing device 15. It can be seen that it is.

In addition, since it is not output from the connection sensor 9, the solenoid valve 14
As a result, even if an attempt is made to discharge the oil from the tank truck 4, the inside of the tank tank 4 becomes a negative pressure and the oil cannot flow out, so that the oil mixture can be prevented.

Next, when oil is replenished from the tank tank 4 to the oil tank 3, the vapor from the tank tank 3 is sent to the tank tank 4. As a result, the inside of the lorry tank 4 does not become a negative pressure, and the lorry tank 4 moves from the oil storage tank 3
The oil is discharged smoothly. By the way, oil storage tank 3
When the liquid level is full, the liquid level sensor 10 detects this, and from there, a full signal is output to the solenoid valve 14, which causes the solenoid valve 14 to close. As a result, the vapor is prevented from returning from the oil storage tank 3 to the lorry tank 4 via the vapor return pipe 12, so that the inside of the lorry tank 4 becomes a negative pressure and further oil is discharged from the lorry tank 4. Is blocked.

At the same time, the full tank signal is also output to the voice generator 15 to notify that the oil storage tank 3 is full and the solenoid valve 14 is closed, such as "valve closed". Therefore, the worker stops the discharge of oil from the lorry tank 4.

During the replenishment, the vapor generated from the oil storage tank 3 passes through the vapor return pipe 12 as described above and the tank tank 4
Although it is collected inside, if it is abnormal, it is discharged from the air vent 11 to the outside of the building 1 to the exhaust duct 16 having an open end.

〔The invention's effect〕

As described above, in the gas station of the present invention, when the oil storage tank is full, the discharge of oil is stopped, and a valve having a simple structure is provided in the branch pipe for connecting the vapor return pipe so that the oil storage tank is full. At times, the valve closes to prevent the vapor from returning and the negative pressure in the tanker tank is used to stop the refueling, so this can be done reliably with few failures, and the safety of the gas station can be secured. It is a thing.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a gas station of the present invention, FIG. 2 is a vertical sectional front view of a branch pipe for connecting a vapor return pipe, which is a main part of the same, and FIG. 3 is a block diagram of the embodiment. is there. 1 ... Building, 2 ... Gasoline refueling machine 3,3 ', 3 "... Oil storage tank 4 ... Lowry tank 5 ... Refueling pipe 6 ... Lubrication pipe, 7 ... Water detection port 8 ... Electronic oil level gauge 9,9', 9 ″… Connection sensor 10, 10 ′, 10 ″… Liquid level sensor 11… Air vent 12… Vapor return pipe, 13… Connection branch pipe 14, 14 ′, 14 ″… Solenoid valve, 15… Voice generator 16… Exhaust duct , A ... Gas station

Claims (1)

[Claims] 1. A branch pipe for connecting a vapor return pipe to a lorry tank is provided in the middle of an air vent raised from an underground oil storage tank, and the branch pipe is provided with a valve that closes when the oil storage tank is full. Characteristic gas station.