JP2002002899A - Residual amount adjustment device of oil storing tank at oil supplying station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a restriction against an amount of transfer with a pipe passage as much as possible and adjust a residual amount of oil. SOLUTION: There are provided oil storing tanks 1, 2 for supplying fuel oil to an oil feeding device; a transferring tank 3 capable of supplementing fuel oil through a tank car; and a submersible pump 33 installed inside the transferring tank 3. A discharging pipe 34 of the pump 33 is communicated with the oil storing tanks 1, 2 and then the fuel oil is forcedly fed to the oil storing tanks 1, 2 from the transferring tank 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for easily adjusting the stock amount of an underground tank for storing fuel oil consumed by a fueling device.

[0002]

2. Description of the Related Art An apparatus for adjusting the stock amount of an underground tank for supplying fuel oil to a fueling apparatus is disclosed in Japanese Patent Publication No. 7-37280,
As shown in Japanese Patent Publication No. 7-80519, a thin suction pipe is inserted from the lubrication port of each of a plurality of underground tanks, and one end is pulled out to the ground. It was configured to regulate the amount of oil storage between the two.

[0003]

According to this, although it is possible to add a device for adjusting the stock amount without requiring a change to the underground buried portion, the suction from the lubrication port of the existing underground tank can be performed. Due to the insertion of the pipe, its diameter is limited, and it is necessary to pass through a bent part, so it is necessary to use a pipe made of a flexible material, the transfer amount per unit time is small, There is a problem that it takes time to adjust the stock amount between the tanks. The present invention has been made in view of such a problem, and an object thereof is to adjust a stock amount in a short time while minimizing a restriction on a transfer amount due to a pipeline. An object of the present invention is to provide an inventory control device for an oil storage tank in a gas station.

[0004]

According to the present invention, there is provided an oil storage tank for supplying fuel oil to a fueling device, a transfer tank capable of replenishing fuel oil by a lorry, A pump for pumping provided inside the transfer tank, and a discharge pipe of the pump for pumping is connected to the oil storage tank.

[0005]

The fuel oil in the transfer tank is pumped by a pump provided inside the tank, so that the fuel oil can be reliably transferred to the oil storage tank at a large flow rate regardless of the tank liquid depth.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. Oil storage tanks 1 and 2 for supplying fuel oil to a refueling device (not shown) are provided with level gauges 11 and 21 for detecting a liquid level and lubrication pipes 12 and 22 for replenishing fuel oil from a lorry. 13, 23
Is buried underground so that it is exposed above ground.

The transfer tank 3 is an oil storage means for stock adjustment provided separately from the tanks 1 and 2. The transfer tank 3 is provided with a liquid level gauge 31 and an oil supply pipe 32 for receiving fuel oil from a lorry. A pressure pump for intermediate installation, in this embodiment, a submerged pump 33 is installed.

[0008] The submerged pump 33 is
And a discharge pipe 34 is drawn out to the ground via a lubrication port 35 exposed to the ground. Also, as shown in FIG.
The discharge pipe 37 is installed so as to be drawn out.

The discharge pipe 34 is extended to the lubrication ports 13 and 23 of the tank 1 and the tank 2 by the pipe 4,
4 are connected to lubrication ports 13 and 23 of the respective oil storage tanks 1 and 2.

The control means 5 includes a liquid level meter 3 for each of the tanks 1 and 2.
1 to output signals to the solenoid valve driving means 6 and the pump driving means 7 in accordance with the stock amount, as described later, to control the operations of the solenoid valves 14, 24 and the submerged pump 33. Is configured.

The operation of the above-configured apparatus will be described with reference to the flowchart shown in FIG. When the amount of liquid in the oil storage tank, for example, the oil storage tank 1 decreases due to the refueling of the vehicle by the oil supply device, and the amount of liquid decreases to the lower limit level set in the tank 1, the controller 5 controls This is detected by a signal (step b). Next, the control means 5 detects the amount of oil storage by the liquid level gauge 31 of the transfer tank 3 (step b), and outputs an alarm if the oil storage amount has decreased to the set lower limit, and outputs the alarm. To refuel the fuel oil (Step C).

If sufficient fuel oil is present in the transfer tank 3, the solenoid valve 14 of the oil storage tank 1 is opened and the submerged pump 33 is operated (step d). As a result, the fuel oil in the transfer tank 3 is transferred to the oil storage tank 1 by the submerged pump 33.
Since the fuel oil is pressure-fed through the pipeline 4 by the submerged pump 33 installed at the bottom of the transfer tank 3, the liquid can be fed at a higher pressure than a conventional device using a suction tube. The oil storage tank can be adjusted to the specified amount in a short time.

During the transfer period, the control means 5 outputs an alarm at the stage when the oil storage amount is detected by the liquid level gauge 31 of the transfer tank 3 and the oil storage amount is reduced to the set lower limit value (step E), and an alarm is output. In addition to prompting the supply of fuel oil to the tank 3, the solenoid valve 14 in the open state is closed, and the submerged pump 3 is closed.
Stop 3 (Step f).

On the other hand, while fuel oil is being transferred from the transfer tank 3 to one oil storage tank 1,
When the control means 5 detects that the liquid amount has decreased to the lower limit value of the tank 2 by a signal from the liquid level gauge 11 (step S), the solenoid valve 24 of the tank 2
Is opened (step), and the fuel oil pumped by the pump 33 is supplied from the oil inlet 23.

As described above, when the liquid amount in any one of the oil storage tanks 1 and 2 reaches the preset upper limit value by the replenishment of the fuel oil from the transfer tank 3, the control means 5 sets the liquid level gauge 11 and This is detected by the signal from step 21 (step
B) The solenoid valves 14 and 24 of the oil storage tanks 1 and 2 whose liquid amount has reached the upper limit value are closed (step nu). Control means 5
Continuously monitors the presence or absence of the solenoid valves 14 and 24 in the open state (step), and stops the submerged pump 33 when all the solenoid valves are closed (step).

The fuel oil in the transfer tank 3 is automatically transferred by repeating the above steps so that the liquid amount in the oil storage tanks 1 and 2 always falls within the range between the lower limit and the upper limit. Automatically adjust the stock of the oil storage tank.

In the above-described embodiment, an example has been described in which the transfer tank is newly installed and the stock amount of the existing oil storage tank is adjusted. However, one of two or more oil storage tanks is used. Construction work to install a submerged pump
It is clear that the same effect can be obtained even if the construction for connecting this pump to another oil storage tank is performed.

[0018]

As described above, in the present invention,
It has an oil storage tank that supplies fuel oil to the refueling device, a transfer tank that allows refueling of fuel oil by a lorry, and a pressure pump installed inside the transfer tank, and stores the discharge pipe of the pressure pump. Since the tank is connected to the tank, no negative pressure acts on the transfer pipe, and the fuel oil can be reliably transferred to the oil storage tank at a large flow rate. In addition, since the pump is installed in the transfer tank, the fuel depth is not limited, and the fuel oil can be reliably transferred from the large transfer tank.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a stock amount adjusting device for a gas station underground tank of the present invention.

FIG. 2 is a view showing another embodiment of a tank used in the same device.

FIG. 3 is a flowchart showing an operation of the above device.

[Explanation of symbols]

 1, 2 Oil storage tank 3 Transfer tank 4 Pipeline 11, 21 Level gauge 12, 22 Lubrication pipe 13, 23 Lubrication port 14, 24 Solenoid valve 23 Lubrication port 24 Solenoid valve 31 Level gauge 32 Lubrication pipe 33 Submerged pump 33 pump 34 discharge pipe 35 lubrication port

Claims (6)

[Claims] 1. An oil storage tank for supplying fuel oil to an oil supply device, a transfer tank capable of replenishing fuel oil by a lorry, and a pressure pump installed inside the transfer tank. For adjusting the stock quantity of the oil tank at the gas station where the discharge pipe of the pump for the tank is connected to the oil tank. 2. The apparatus according to claim 1, wherein the discharge pipe is connected to each of a plurality of oil storage tanks via valves. 3. When the amount of liquid in the oil storage tank falls to a preset lower limit, the pump for pumping is operated to supply liquid to the oil storage tank, and the amount of liquid in the oil storage tank is reduced. An inventory control device for a fueling station oil storage tank, comprising a control means for stopping the pump when a predetermined upper limit is reached. 4. The refueling station storage tank stock amount adjusting device according to claim 1, further comprising control means for stopping the pump when the liquid amount in the transfer tank drops to a preset lower limit value. . 5. A fuel supply system comprising: a plurality of oil storage tanks for supplying fuel oil to a refueling device; a transfer tank capable of replenishing fuel oil by a lorry; and a pressure feed pump installed inside the transfer tank; The discharge pipe of the pump for pumping is connected to each of a plurality of oil storage tanks via respective valves, and the valve of the oil storage tank is opened when the amount of liquid in the oil storage tank decreases to a preset lower limit. Operate the pump for pumping to feed the oil to the oil storage tank, and when the amount of liquid in the oil storage tank reaches a preset upper limit, close the valve of the oil storage tank. And a pump for stopping the pump. 6. The stock quantity of the oil storage tank according to claim 1, wherein the pump for pressure feeding is inserted and installed through a through hole formed in an upper part of the transfer tank. Adjustment device.