JPH05221500A - Oil storage system in oil station - Google Patents

Abstract

PURPOSE:To control the stock oil in an underground tank and efficiently make use of the stocked oil, by connecting the bottoms of the tanks to each other, in an oil station having a plurality of underground tanks stocking the same kind of oil. CONSTITUTION:Underground tanks 1-3 reserving same kind of oil is fed from oil-feed inlets 10-12 through oil-feed pipes 7-9. A piping system 13 is connected to respective bottoms of these underground tanks 1-3. The piping system 13 is composed of a main pipe 14 and branch pipes 15-17. One end of each branch pipe 15-17 is jointed to the bottom of respective underground tanks and the other end thereof is jointed to the main pipe 14. The connected position of one end of each branch pipe 15-17 with the bottom of respective underground tanks 1-3 is the place where the front end of the suction pipes 4-6 in the tanks is positioned. In this way, the oil levels of respective tanks can be equalized and hence, the stocked oil can be efficiently utilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil storage device for a gas station having a plurality of underground tanks of the same oil type.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
Although 1 and 2 weighing machines 37-40 were connected from 1,32 via the oil supply pipes 33-36, the vehicle was refueled,
Depending on the location where the weighing machine is installed, there are weighing machines that are frequently entered by the vehicle and weighing machines that are infrequently used, resulting in a large difference in the amount of refueling.

The difference in the amount of refueling is directly related to the amount of inventory in the underground tank, and even with the same tank of 10 kiloliters,
Inventories of tanks connected to weighing machines with a large amount of refueling decrease rapidly, and tanks connected to weighing machines with a small amount of refueling decrease only slightly.

Finally, although one tank is sufficiently in stock, the other tank is out of stock, and the weighing machine connected to the unstocked tank cannot be used. There is a lot of waste, such as inducing tanks and arranging tank trucks just for tanks that are out of stock.

In order to solve this, there is an automatic balancing system as shown in FIG. This is the underground tank 5
Liquid level detectors 70 to 54 connected to the three-way valves 61 to 63 from the suction pipes 0 to 54 and provided in the respective underground tanks 50 to 54
In this system, the output of 74 is monitored by the digital liquid level gauge 81, and the controller 82 operates the three-way valves 61 to 63 according to the change of the stock amount to switch the underground tank to be used.

[0006]

However, when the system is to be installed at an existing gas station, it is necessary to replace all the piping from the tank to the weighing machine, which makes the construction complicated and the construction cost is low. There was a problem of being expensive.

The problem to be solved by the present invention is to adjust the stock quantity of underground tanks by a simple remodeling work and utilize the stock efficiently.

[0008]

The oil storage device of a gas filling station of the present invention is characterized in that the bottom portions of a plurality of underground tanks storing the same type of oil are connected to each other through pipes.

The pipe is composed of a main pipe and a branch pipe corresponding to each underground tank. One end of each branch pipe is connected to the bottom of each underground tank and the other end is connected to the main pipe. The connection position between one end of the branch pipe and the bottom of the underground tank is preferably a position facing the tip of the suction pipe in the tank.

Further, if necessary, it is possible to close the communication state between an arbitrary underground tank and another underground tank,
An on-off valve can be provided in the middle of each branch pipe.

[0011]

In the oil storage device of the present invention, since the bottoms of the respective underground tanks communicate with each other, when the liquid level in any of the underground tanks drops due to the siphon effect, oil flows in from the other underground tanks. Therefore, the liquid levels in all tanks are always kept almost equal. Further, when replenishing oil to the underground tank, it is replenished to all the underground tanks only by replenishing to any one of the underground tanks.

[0012]

FIG. 1 is a diagram showing the construction of an oil storage device in an embodiment in which the present invention is applied to a gas station equipped with three underground tanks.

In the figure, reference numerals 1, 2 and 3 denote underground tanks for storing oils of the same oil type. In this embodiment, a pipe 13 is connected to the bottoms of the underground tanks 1, 2 and 3 to form the underground tank 1. , 2 and 3 are communicated with each other. In addition, in the figure, 4, 5 and 6 are rising pipes, 7, 8 and 9 are oil supply pipes, 10, 11 and 12 oil injection ports, and these are a part of normal gas station facilities.

The pipe 13 for connecting the bottoms of the underground tanks 1, 2, 3 to each other is composed of a main pipe 14 and branch pipes 15, 16, 17 and one end of each of the branch pipes 15, 16, 17 is connected to the underground tanks 1, 2. , 3 and the other end is connected to the main pipe 14. One end of the branch pipes 15, 16 and 17 and the underground tank 1,
The connection position with the bottom of 2, 3 is the suction pipe in the tank 4,
Positions facing the tips of 5 and 6. Branch pipe 1 at this position
By opening one end of 5, 16, 17, for example, when refueling the vehicle from the underground tank 1, the suction pipe 4
Since the siphon effect of the pipe 13 is promoted by the suction force of the pipe 13, the oil in the underground tanks 2 and 3 quickly flows into the underground tank 1 even if the pipe 13 does not have a large diameter, , 3 become equal.

Since the liquid level in each of the underground tanks 1, 2 and 3 is monitored by a level sensor (not shown), oil is replenished when the liquid level falls below a predetermined level. Since the siphon effect is still in effect during this replenishment, only one of the underground tanks is refueled to refuel all tanks.

FIG. 2 is a view showing another embodiment of the present invention, in which an opening / closing valve is provided in the middle of each branch pipe of the apparatus of the embodiment shown in FIG. In the figure, the same components as those shown in FIG. 1 are designated by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

In this embodiment, the underground tanks 1, 2,
Branch pipes 15 and 1 of the pipe 14 for communicating the bottoms of the three
On-off valves 18, 19, 20 are provided in the middle of 6, 17.

The on-off valves 18, 19 and 20 are normally kept open so that the bottoms of the underground tanks 1, 2 and 3 are communicated with each other to store the same kind of oil, but different oils are stored in any of the underground tanks. When it becomes necessary to store seed oil, the branch valve of the underground tank can be closed and used as an independent underground tank. These on-off valves 1
From the viewpoint of accident prevention, do not open / close 8, 19, 20 while oil is being supplied to the underground tank.

[0019]

As described above, the present invention has the following effects.

It is possible to adjust the inventory volume of the underground tank and efficiently utilize the inventory by a simple construction in which piping is connected to the bottom of the existing underground tank.

By adjusting the inventory amount, it is possible to prevent the inventory assets of the tank with poor rotation from being left for a long time, and it is possible to utilize the inventory efficiently.

The frequency of stays decreases significantly with the number of times a tank truck is arranged.

The oil of the specific weighing machine will not run out, and it will not be necessary to guide or replace the passenger car.

[0024] At a gas station, the inventory amount of a plurality of tanks is uniformly reduced, so that the amount of oil received at one time is increased, and the amount of oil loaded is extremely increased in a tank truck vehicle. The cost can be reduced.

Since the consumption stock amount can be afforded, the time designation when arranging a tank truck vehicle is drastically reduced.

Since the amount of oil received per gas station is large,
The number of vehicles for two gas stations will be extremely reduced, and trailer delivery will be possible.

When replenishing oil to the underground tank, all the underground tanks can be replenished by simply replenishing the oil to any one of the underground tanks, so that the replenishment work is simplified.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an oil storage device in an embodiment in which the present invention is applied to a gas station equipped with three underground tanks.

FIG. 2 is a diagram showing another embodiment in which an opening / closing valve is provided in the middle of each branch pipe of the apparatus of FIG.

FIG. 3 is a diagram showing a configuration of a conventional oil storage device.

FIG. 4 is a block diagram showing an example of a conventional inventory balance system.

[Explanation of symbols]

1, 2, 3 underground tanks, 4, 5, 6 rising pipes,
7, 8, 9 Oil supply pipe, 10, 11, 12 Oil inlet, 13
Piping, 14 main pipes, 15, 16, 17 branch pipes, 18,
19,20 Open / close valve

Claims (3)

[Claims] 1. An oil storage device for a gas station, wherein bottoms of a plurality of underground tanks storing the same type of oil are connected to each other through piping. 2. The pipe is composed of a main pipe and a branch pipe corresponding to each underground tank, one end of each branch pipe is connected to the bottom of each underground tank, and the other end is connected to the main pipe. Oil storage device of the gas station described. 3. The oil storage device according to claim 2, wherein an opening / closing valve is provided in the middle of each of the branch pipes.