JPH05221499A - Stock control system in oil station - Google Patents

Abstract

PURPOSE:To rationally control the stock oil in an underground tank by providing a suction pipe in each tank and connecting the base of the pipes to each other with a pipe and freely transferring the oil between the tanks through the pipe in an oil station having a plurality of underground tanks stocking the same kind of oil. CONSTITUTION:When one of the stocked oil of respective underground tanks 1, 2, the underground tank 1 for instance, detected by oil level sensors 14, 15 decreases to less than a specified volume or the difference between the two becomes larger than a specified one, an-instruction to open a solenoid valve 9 for suction operation and a solenoid valve 10 for oil feeding is transmitted by a solenoid valve controller 17 to actuate an oil-feed pump 12. In this way, the oil in the underground tank 2 is sucked through the suction pipe 4 and transferred to an adapter 7 of an oil-feed inlet 5 side through pipe 7-2, solenoid valve 9, pipe 7-5, 7-6, solenoid valve 10, and pipe 7-1 and conducted to the underground tank 1 through a suction pipe 3. When the stock volume in the underground tanks 1, 2 becomes almost equal, the pump 12 is stopped and the solenoid valves 9, 10 are closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inventory amount adjusting system for effectively utilizing inventory in 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]

[Problems to be Solved by the Invention] However, when installing the system at an existing gas station, it is necessary to replace all the piping from the tank to the weighing machine, which requires a long construction period and hinders the operation of the gas station. There are many problems such as being done.

The problem to be solved by the present invention is to adjust the amount of underground tank stock at a gas station to efficiently use the inventory, and to minimize the construction range to significantly reduce the business interruption time of the gas station. It is in.

[0008]

In order to solve this problem, the inventory amount adjusting system of the present invention is designed so that a stocking station having a plurality of underground tanks storing the same type of oil droops into each underground tank. Provided with a suction pipe whose base end is led to the outside, connecting the base ends of the suction pipes with a pipe, and providing a means for supplying oil from an underground tank to another underground tank via the pipe. Is characterized by.

When it is decided that the frequency of use of a particular underground tank is low, the system for refueling that underground tank is omitted, and only the refueling system from that underground tank to other underground tanks is used. You can also

As means for supplying oil from one underground tank to another underground tank, a pump is provided in the middle of the pipe to suck the oil in one underground tank and supply it to the other underground tank. An opening / closing solenoid valve, a two-way solenoid valve, a three-way solenoid valve, or a check valve can be provided at required places in the piping on the inlet side and the outlet side of the pump.

The oil supply between the tanks may be performed manually by monitoring the oil amount or liquid level in each underground tank.
Depending on the signal from the sensor that detects the oil amount or liquid level in each underground tank, the oil amount or liquid level in one of the underground tanks will be below a certain level, or the difference in the oil amount or liquid level from other underground tanks will be above a certain level. It is desirable to provide a control device that drives the pump to supply oil from an underground tank having a large amount of oil or a high liquid level to an underground tank having a small amount of oil or a low liquid level.

Further, the suction pipes provided in the respective underground tanks are connected at their proximal ends with a pipe, and the same pipe is provided with a solenoid valve connected to the atmosphere side and a solenoid valve connected to the suction device. You can also

In this case, a pump is used as the suction device, and the amount of oil or liquid level in each underground tank is monitored to manually operate the pump, or a sensor for detecting the amount of oil or liquid level in each underground tank is used. Depending on the signal, when the oil amount or liquid level in one of the underground tanks is below a certain level or the difference in oil amount or liquid level from other underground tanks is above a certain level, the pump is automatically driven and each rising pipe Fill the tank with oil so that the liquid level in all underground tanks becomes equal by siphoning.

[0014]

In the present invention, the oil amount or liquid level of each underground tank is monitored, and the oil amount or liquid level of any of the underground tanks is below a certain level or the oil amount or liquid level of other underground tanks. When the difference exceeds a certain level, oil is automatically or manually operated from the underground tank with a large amount of residual oil to the underground tank with a small amount of residual oil by supplying oil through the riser pipes. The amounts are almost equal.

Further, by using the siphon phenomenon to equalize the liquid levels in all the underground tanks, the remaining amount in each underground tank becomes substantially equal.

When it is determined that a particular underground tank is used infrequently, the cost of equipment can be reduced by omitting the system for refueling the underground tank.

The work for remodeling may be carried out only in the part where the underground tank is installed, and can be carried out without modifying the site where the weighing machine is installed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in the drawings.

FIG. 1 is a block diagram showing the first embodiment of the system according to the present invention. In the figure, 1 and 2 are underground tanks, and 3 and 4 are suction pipes that hang down until their tips are located at the bottom of the tanks 1 and 2. The rising pipe for refueling is not shown. The base ends 5 and 6 of the suction pipes 3 and 4 are out of the tank, and the pipe 7 is connected to the base ends 5 and 6. The pipe 7 is for supplying oil from the underground tanks 1 to 2 or from the underground tanks 2 to 1,
Pipe lines 7-1, 7-2, 7-3, 7-4, 7-5, 7-6
Consists of. The pipe lines 7-1 and 7-2 are connected to each other via the suction opening / closing solenoid valves 8 and 9 in the middle thereof, and further connected to the oil passage opening / closing solenoid valves 10 and 11 at the tip end portions thereof. Solenoid valves for suction opening / closing 8, 9 and solenoid valve for lubricating opening / closing 10,
An oil supply pump 12 is provided between the oil supply pump 11 and the oil supply pump 11. Reference numeral 13 in the figure denotes a motor for driving the oil supply pump 12.

The underground tanks 1 and 2 are respectively provided with oil level sensors 14 and 15 for detecting the stock quantity, and the detection outputs thereof are input to a digital indicator 16. The output of the digital indicator 16 is input to the solenoid valve control device 17.

One of the stock quantities of oil in each of the underground tanks 1 and 2 detected by the oil level sensors 14 and 15, for example, the stock quantity of the underground tank 1 is below a fixed value, or the mutual difference is a fixed value. As described above, the solenoid valve control device 17 issues a command to open the suction opening / closing solenoid valve 9 and the oiling opening / closing solenoid valve 10, and operates the oil supply pump 12. As a result, the oil in the underground tank 2 is sucked up via the suction pipe 4, and the pipelines 7-2 and 7-4, the solenoid valve 9, the pipeline 7-5, the oil supply pump 12, the pipeline 7-6, and the electromagnetic passage. Oil is supplied into the underground tank 1 through the suction pipe 3 through the valve 10 and the pipe line 7-1. Pump 1 when inventory quantity in underground tanks 1 and 2 becomes almost equilibrium value
2 is stopped and the solenoid valves 9 and 10 are closed.

Instead of the suction opening / closing solenoid valves 8 and 9 and the oil supply opening / closing solenoid valves 10 and 11, two-way solenoid valves or three-way solenoid valves can be used.

FIG. 2 shows a second embodiment, in which two three-way solenoid valves 18, 19 are used instead of the opening / closing solenoid valves 8, 9, 10, 11 in the first embodiment, and the same oil is used. It is made possible to supply.

In this embodiment, for example, when refueling from the underground tank 2 to the underground tank 1, the pipelines 7-2, 7
-4, three-way solenoid valve 18, pipe line 7-5, refueling pump 12,
Oil is supplied through the pipe line 7-6, the three-way solenoid valve 19, and the pipe line 7-1.

The above-mentioned first and second embodiments are examples in the case of two underground tanks, but can be similarly applied to the case of three or more underground tanks.

FIGS. 3 and 4 show an example in which the same system as the first and second embodiments is applied to three underground tanks.

In the third embodiment shown in FIG. 3, the pipe 7 is connected to the base end portions 5, 6, 6a of the suction pipes 3, 4, 4a of the three underground tanks 1, 2, 2a. There is. The pipe 7 is
In the pipe 7 of the first embodiment shown in FIG.
-3a and opening / closing solenoid valves 9a and 11a are additionally provided.

The fourth embodiment shown in FIG. 4 uses three three-way solenoid valves 20, 21, 21a instead of the opening / closing solenoid valves 8, 9, 9a, 10, 11, 11a shown in FIG. is there.

In the case of these third and fourth embodiments, the first,
As in the case of the second embodiment, oil can be supplied from another tank to a tank with a small remaining amount.

The above is an example of a system in which all underground tanks can be refueled with each other. However, depending on the filling station, the underground tanks that are frequently used due to the installation location of the weighing machine or the like. In some cases, there are certain underground tanks that are rarely used. Therefore, when the system of FIGS. 1 to 4 is installed, the refueling system for a specific underground tank may not be used. Therefore, it is possible to provide a system in which only an oil supply system from an underground tank that is rarely used to an underground tank that is frequently used is provided.

FIG. 5 shows a fifth embodiment, in which the underground tank 1 is used less frequently and the underground tank 2 is used more frequently. In this case, the pipe 7 is the pipeline 7-1.
And the pipe line 7-2 are connected via the oil supply pump 12, and the oil flow is in one direction from the pipe line 7-1 to the pipe line 7-2 side. As a result, when the oil amount or the liquid level in the underground tank 2 becomes a certain value or less, or when the difference from the oil amount or the liquid level in the underground tank 1 becomes a certain value or more, the output of the digital indicator 16 causes the pump driving device 22. The oil in the underground tank 1 is transmitted to the suction pipe 3 by driving the motor 13 to operate the oil supply pump 12.
Is sucked up through the pipe line 7-1, the oil supply pump 12,
It is supplied into the underground tank 2 via the pipe line 7-2 and the suction pipe 4. When the stock quantity in the underground tanks 1 and 2 reaches a nearly equilibrium value, the fuel pump 12 is stopped. As described above, the system of the present embodiment can be sufficiently applied when there is an underground tank which is frequently used and whose oil amount or liquid level often decreases.
The equipment cost can also be reduced as compared with the system of FIG.

FIG. 6 shows a sixth embodiment. A check valve 23 is provided in the middle of the pipeline 7-1 of the embodiment of FIG. 5, and the suction pipe 3 is provided after the oil supply pump 12 is stopped. It prevents oil from falling. The other configurations are similar to those of the system shown in FIG.

FIG. 7 shows a seventh embodiment, which is 3
The system in the case where the underground tank 1 is a tank which is rarely used among the basic underground tanks 1, 2 and 2a is shown. In this case, the underground tank 2 in the system of FIG.
(A) is attached to an element having the same configuration as that having a plurality of systems. The suction pipes 4 and 4a are connected to the oil supply pump 12 via electromagnetic valves 24, 24a. Therefore, when the oil amount or the liquid level of either the underground tank 2 or 2a, for example, the underground tank 2a becomes a certain value or less or the difference from the oil amount or the liquid level of the underground tank 1 becomes a certain value or more, the digital indicator The output of 16 is transmitted to the solenoid valve control device 17, the corresponding solenoid valve 24a is opened, the motor 13 is driven to operate the oil supply pump 12, and the oil in the underground tank 1 is sucked through the suction pipe 3. It is sucked up and supplied into the underground tank 2a through the pipe line 7-1, the oil supply pump 12, the electromagnetic valve 24a, the pipe line 7-2a, and the suction pipe 4a. In the case of the other underground tank 2, oil is similarly supplied from the underground tank 1.

In the above first to seventh embodiments, the oil level sensors 14, 15, 15 of the underground tanks 1, 2, 2a are used.
An automatic device that automatically drives the solenoid valve control device 17 or the pump drive device 22 according to the detected value of a to transfer oil is shown. However, when there is no oil level sensor etc., the operator manually operates the electromagnetic valve. Valve control device 17 or pump drive device 2
It is also possible to operate 2 to transfer the oil.

FIG. 8 shows an eighth embodiment of the present invention, in which a pipe line 7- connected to the base ends of the suction pipes 3, 4, 4a.
1, 7-2, 7-2a are combined into one, and solenoid valves 25, 2
6 is provided. Solenoid valve 26 that automatically connects to the atmosphere when there is a difference in the remaining amount of any of the underground tanks 1, 2 and 2a
Is closed and the pump 12 is operated. The suction of the pump 12 starts, and the pipe lines 7-1, 7-2, 7-2a and the suction pipe 3,
Solenoid valve 2 automatically when air in 4, 4a is exhausted
When 5 is closed and the pump 12 is stopped, the oil naturally moves until the level of the liquid level in the tanks 1, 2 and 2a becomes uniform due to the siphon effect. Receiving a uniform signal from the oil level sensors 14, 15 and 15a and automatically opening the solenoid valve 26 to drop the oil in the pipelines 7-1, 7-2 and 7-2a so that the siphon does not always become siphon. To

The ninth embodiment of FIG. 9 uses a three-way solenoid valve 27 in place of the opening / closing solenoid valves 25 and 26 of FIG. 8, and since the other construction and operation are the same, the description thereof will be omitted.

In the eighth and ninth embodiments, the signals from the oil level sensors 14, 15, 15a are input to the solenoid valve control device 19 to control the oil level in the underground tanks 1, 2, 2a. Although the leveling is performed, if the oil level sensor is not provided, the operator manually operates the solenoid valve control device 17 to level the level of the oil in the underground tanks 1, 2, 2a. You can also

In the above embodiment, the pipe 7 is provided separately from the oil supply pipe for supplying oil to the underground tank. However, the oil supply pipe is a double pipe and the pipe is inserted into the oil supply pipe. With the structure, piping work will be completed simply by replacing the oil supply pipe.

By the way, the current Fire Defense Law prohibits suctioning from underground tanks during unloading, that is, selling and moving oil with a weighing machine. It is desirable to keep the regulation system inoperative. For example, when the level of the underground tank is increasing at a constant speed, it is automatically detected that the tank is being unloaded, and the power of the automatic inventory adjustment system of the present invention is turned off, or the movement of oil is stopped, When the operation is completed, it will be automatically restored.

[0040]

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

Since the system can be constructed with almost no modification to the existing equipment, the business hindrance time can be shortened at the time of remodeling.

By adjusting the stock amount, it is possible to prevent the stock property of the tank with poor rotation from being laid for a long time, and it is possible to efficiently use the stock.

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

It is not necessary to run out of oil in the specific weighing machine, and it is not necessary to guide or replace the passenger car.

Since the stock amount of a plurality of tanks is uniformly reduced at the gas station, the amount of oil received at one time is increased, and the amount of oil loaded is extremely increased in the tank truck vehicle, and the number of vehicles to be dispatched is also reduced. The cost can be reduced.

Since the amount of inventory to be consumed can be increased, the time designation when arranging a tank truck vehicle is drastically reduced.

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

When it is determined that the specific underground tank is used less frequently, the facility cost can be reduced by omitting the system for refueling the underground tank.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a system of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the system of the present invention.

FIG. 3 is a configuration diagram showing a third embodiment of the system of the present invention.

FIG. 4 is a configuration diagram showing a fourth embodiment of the system of the present invention.

FIG. 5 is a configuration diagram showing a fifth embodiment of the system of the present invention.

FIG. 6 is a configuration diagram showing a sixth embodiment of the system of the present invention.

FIG. 7 is a configuration diagram showing a seventh embodiment of the system of the present invention.

FIG. 8 is a configuration diagram showing an eighth embodiment of the system of the present invention.

FIG. 9 is a configuration diagram showing a ninth embodiment of the system of the present invention.

FIG. 10 is a schematic diagram showing a configuration of a conventional refueling facility.

FIG. 11 is a block diagram showing an example of a conventional inventory balance system.

[Explanation of symbols]

1,2,2a underground tank, 3,4,4a suction pipe,
5, 6, 6a Base end, 7 pipes, 8, 9, 9a, 10, 1
1, 11a solenoid valve, 12 oil supply pump, 13 motor,
14, 15, 15a Oil level sensor, 16 Digital indicator, 17 Solenoid valve control device, 20, 21, 21a Solenoid valve, 22 Pump drive device, 23 Check valve, 24, 24
a, 25, 26, 27 solenoid valve

Claims (10)

[Claims] 1. In a gas station having a plurality of underground tanks storing the same type of oil, suction pipes are provided in each of the underground tanks, the base ends of which are led to the outside, and the base ends of the respective suction pipes. An inventory adjustment system at a gas station, comprising means for connecting oil to each other through a pipe and supplying oil from an underground tank to another underground tank through the pipe. 2. The inventory adjustment system in a gas station according to claim 1, wherein the means for supplying oil from one underground tank to another underground tank is a pump provided in the middle of the pipe. 3. The inventory quantity adjusting system in a gas station according to claim 2, wherein solenoid valves are provided in the pipe lines on the inlet side and the outlet side of the pump. 4. A stock quantity adjusting system at a gas station according to claim 2, wherein a three-way solenoid valve is provided in a pipe line on the inlet side of the pump. 5. The inventory quantity adjusting system at a gas station according to claim 2, wherein a check valve is provided in a pipe line on the inlet side of the pump. 6. The inventory quantity adjusting system in a gas station according to claim 2, wherein an electromagnetic valve is provided in a pipeline on the outlet side of the pump. 7. The signal of a sensor for detecting the oil amount of each underground tank causes the oil amount or the liquid level of one of the underground tanks to be below a certain level or the difference in the oil amount or the liquid level from other underground tanks to be above a certain level. When it becomes, a control device for driving a pump to supply oil from an underground tank having a large amount of oil or a high liquid level to an underground tank having a small amount of oil or a low liquid level is provided. 7. The inventory amount adjustment system at a gas station according to any one of 2 to 6. 8. In a gas station having a plurality of underground tanks that store the same type of oil, suction pipes are provided in each of the underground tanks, the base ends of which are led out to the outside, and the base ends of the suction pipes are provided. A stock adjustment system at a gas station, characterized in that a solenoid valve connected to the atmosphere side and a solenoid valve connected to the suction device are provided in the pipes. 9. The inventory adjustment system in a gas station according to claim 8, wherein the suction device is a pump. 10. The signal of a sensor for detecting the oil amount of each underground tank causes the oil amount or the liquid level of one of the underground tanks to be below a certain level or the difference in the oil amount or the liquid level from another underground tank to be above a certain level. 10. The stock amount adjustment at the gas station according to claim 9, wherein the pump is driven to fill the riser pipes and pipes of each underground tank with oil so that the liquid level of all underground tanks becomes equal due to the siphon phenomenon. system.