JPH111299A - Oil feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently operate a plurality of submerged pumps by inserting the submerged pumps in a plurality of tanks in which the single kind of oil is stored. SOLUTION: In an oil feed device 1 to be installed in a gas station, measuring machines 2-4 are connected to underground tanks 5A, 5B through an oil feed pipe 6. A submerged pump control device 26 selectively controls the drive of the submerged pumps 18A, 18B based on the signal to be outputted from a nozzle switch 10 of the measuring machines 2-4, and when the number of nozzles during the oil feed is <=2, either of the submerged pumps 18A, 18B which is more in the residual quantity is started based on the residual quantity in the underground tanks 5A, 5B to be detected by level gages 17A, 17B. Because two submerged pumps 18A, 18B are simultaneously driven, or either of the submerged pumps is driven according to the number (n) of the nozzles during the oil feed, the oil of the quantity corresponding to the total oil feed quantity to be fed by the measuring machines 2-4 can be led.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device, and more particularly to an oil supply device configured to selectively start a submersible pump provided for each tank.

[0002]

2. Description of the Related Art For example, a refueling station having a plurality of weighing machines is installed in a gas station or the like. Each weighing machine is provided with an oil supply nozzle for each type of oil for regular gasoline, high-octane gasoline, and light oil. In such a gas station, when a customer's vehicle arrives, a fuel nozzle of an oil type corresponding to the engine specification is inserted into a fuel port of the fuel tank, and the oil liquid stored in an underground tank as an oil liquid storage tank is discharged. Fuel is supplied to the fuel tank.

[0003] An underground tank is provided for each oil type. For example, a plurality of underground tanks are provided for storing regular gasoline whose oil supply is larger than other oil types.
Then, in a gas station having a plurality of underground tanks in which a single oil type of oil is stored, an oil pump is buried in each underground tank, and when the oiling nozzle is removed from the nozzle hook of each meter, Is always operating each submersible pump.

[0004]

As described above, in a gas station having a plurality of underground tanks storing the oil liquid of a single oil type, the oil supply nozzle is removed from the nozzle hook of the measuring machine and the nozzle switch is turned on. , A plurality of submersible pumps were operating in parallel. However, when one or two weighing machines are used at the same time, the pressure loss increases because the total flow passage area of the liquid sending pipeline for sending the oil liquid to each weighing machine is small.

[0005] In this case, despite the fact that a plurality of oil pumps are driven, the discharge amount of the oil liquid actually discharged from the oil supply nozzle may be equal to the discharge capacity of one oil pump. Many. Therefore, when the refueling amount by the refueling nozzle is small, it is not necessary to start all of the plurality of oil pumps. The surplus oil liquid among the oil liquids discharged from the plurality of submerged pumps is returned to the underground tank via the return pipe. Therefore, as a control method of the oil-in-oil pump, one of the oil-in-oil pumps becomes idle (the oil is discharged and the oil liquid is returned to the underground tank) or the operation time becomes several tens of minutes. Had been stopped.

Therefore, in the conventional oil supply device, the oil consumption of each of the plurality of underground tanks varies, and the remaining amount of the oil liquid stored in each underground tank is a single oil type. Is biased. When one of the underground tanks is emptied, an oil tank is requested to be delivered to the oil depot, and the oil liquid delivered by the tank truck while the other underground tank has sufficient oil liquid is transferred to the underground tank. Will be unloaded. In other words, the amount of unloading to the underground tank where the remaining amount of the oil liquid is sufficient decreases, and the number of unloading increases accordingly, so that the oil liquid stored in the plurality of underground tanks cannot be used effectively. Was.

[0007] Therefore, an object of the present invention is to provide a refueling device that solves the above-mentioned problems.

[0008]

The present invention has the following features to solve the above-mentioned problems. According to the first aspect of the present invention, there are provided a plurality of oil supply nozzles for discharging a single oil type of oil liquid, a nozzle use detecting means for detecting whether or not the oil supply nozzle is used, and a single oil type of oil. Pumps provided in a plurality of tanks in which liquids are stored, a liquid feed pipe connecting the plurality of pump discharge ports and the inlets of the plurality of refueling nozzles, and used by a signal from the nozzle use detecting means Control means for controlling the number of pumps to be driven in accordance with the number of nozzles set.

Therefore, according to the first aspect of the present invention, the number of pumps to be driven is switched and controlled in accordance with the number of nozzles used in accordance with a signal from the nozzle use detecting means. The consumption can be equalized. Therefore, when unloading from the tank truck, it is only necessary to unload a certain amount of each tank, so that the unloading work becomes easier and the number of unloading operations can be reduced. In addition, since the number of driving of the pump is controlled in accordance with the number of used fueling nozzles, power consumption can be suppressed, and the load on the pump can be reduced to extend the life of the pump.

According to a second aspect of the present invention, there is provided the fuel supply device according to the first aspect, wherein the control means is configured to control a plurality of tanks based on an accumulated amount of used oil for each tank or a remaining amount for each tank. One of the submersible pumps is selected and activated. Therefore, according to the second aspect of the present invention, one pump is selected from a plurality of pumps and started based on the used cumulative refueling amount of each tank or the remaining amount of each tank, thereby reducing power consumption. In addition, the load on the pump can be reduced and the life of the pump can be extended.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an embodiment of a fuel supply device according to the present invention, and FIG. 2 is a block diagram showing each device. The refueling device 1 installed at the gas station includes a plurality (three in this embodiment) of weighing machines 2 to 4 and a plurality (two in this embodiment) of underground tanks 5A and 5B. Are connected by a liquid feed line 6. In addition, in the weighing machines 2-4,
Usually, a plurality of refueling systems are provided, but FIG. 1 shows only one refueling system for convenience of explanation. The underground tanks 5A and 5B store a single type of oil (eg, regular gasoline).

Each of the weighing machines 2 to 4 has the same configuration,
Refueling nozzle 7 (7₁~ 7_Three) Connected to the refueling hose 8
(8₁~ 8_Three) Is connected to the side. Refueling nozzle 7
(7 ₁~ 7_Three) Is usually a nozzle provided on the side of the housing
Hang 9 (9₁~ 9_Three). For example, for a customer
When the car arrives at the refueling station, the worker refuels
(8₁~ 8_Three) With the nozzle hook 9 (9₁~ 9_ThreeRemove from
It is inserted into the filler port (not shown) of
Do the oil.

In this embodiment, for convenience of explanation, each of the weighing machines 2 to 4 is provided with a refueling nozzle 7 for regular gasoline.
(7 ₁ to 7 ₃₎ is described as an example a structure which is provided one by one. The aforementioned nozzle seat 9 (91 _to 93 _3), the nozzle switch 10 as a nozzle using detecting means (10 ₁ -
10 ₃ ) is provided. This nozzle switch 10
(10 ₁ to 10 _3), when the fuel supply nozzle 7 (7 ₁ to 7 ₃₎ is removed from the nozzle seat 9 (91 _to 93 _3), turns on from off, the fuel supply nozzle 7 (7 ₁ to 7 When ₃₎ is returned to the nozzle seat 9 (91 _to 93 ₃₎ switches from oN to oFF.

[0014] Inside the weighing machine 2-4, refueling hose 8 (8 _{1-8 3)} oil supply conduit communicating with the 11 (11 ₁
To 11 ₃ ) are provided, and the refueling pipeline 11 (111 to ₁ ) is provided.
1 to ₃₎ is the flow meter 12 (12 ₁ to 12 _3), the solenoid valve 13
_{(131-134 3),} a check valve 14 (14 ₁ to 14 ₃₎ are disposed. 15 (15 ₁ to 15 ₃₎ in the control circuit, the fuel supply nozzle 7 (7 ₁ to 7 ₃₎ is a nozzle seat 9 (9 ₁
To 9 ₃ ) and the nozzle switch 10 (10 ₁ to 1)
0 ₃ ) is turned on, the oil pump control device 26 described later
A drive signal is output to the oil pumps 18A and 18B to be described later.
Drive. Further, the control circuit 15 (15 ₁ to 1
5 _3), together to open the solenoid valve 13 _{(131-134 3),} determine the oil amount by integrating the outputted flow pulses from the flow meter 12 (12 ₁ to 12 _3), the display unit 16 ( 16
Display the measured refueling amount in _{1 to} 16 ₃ ).

In each of the underground tanks 5A and 5B, a liquid level meter 1 for measuring the amount of residual oil stored from the liquid level is provided.
7A, 17B and an in-oil pump 18A,
18B. The liquid sending line 6 is provided with a discharge line 19 connected to the discharge ports of the oil pumps 18A and 18B.
A, 19B, a common pipe line 21 in which the discharge pipe lines 19A, 19B are communicated, and each of the weighing machines 2 branched from the common pipe line 21.
It is constructed from a to 4 of the oil supply pipe 11 (11 ₁ to 11 ₃₎ connected to the branch pipe 22 (22 ₁ to 22 _3).
Therefore, oil pump 18A, the hydraulic fluid delivered from 18B, the discharge pipe 19A, 19B, the common line 21, through the branch conduit 22 (22 ₁ to 22 ₃₎ of each weighing machine 2-4 It is supplied to the oil supply line 11 (11 ₁ to 11 _3).

Reference numeral 25 denotes a liquid level controller, which is a liquid level gauge 17A, 17
From the liquid level measured by B, each underground tank 5A, 5
The remaining amount of B is calculated. Reference numeral 26 denotes an oil pump control device, which controls the nozzle switches 10 of the weighing machines 2 to 4 as control means.
(10 ₁ to 10 ₃ ), a control program for selectively driving and controlling the in-oil pumps 18A and 18B based on the signals output from the signals, and the liquid level gauges 17A and 17B when the number of nozzles during refueling is two or less. Tanks 5A, 5 detected by
Based on the remaining amount of B, the pump 18A,
A control program for activating the 18B and averaging the remaining amounts of the underground tanks 5A and 5B is stored in the memory.

Here, the control process executed by the oil pump control device 26 will be described with reference to the flowchart of FIG. In step S1 (hereinafter, “step” is omitted), the submersible pump control device 26 sets the nozzle switch 1
The presence or absence of a signal from 0 (10 ₁ to 10 ₃ ) is checked. The fueling nozzle 7 (7 ₁ ~ to perform refueling
7 ₃₎ either is removed from the nozzle seat 9 (91 _to 93 _3), a drive signal is outputted nozzle switch 10 (10 ₁ to 10 ₃₎ is turned on, the process proceeds to S2, the current It is determined whether or not the number n of nozzles during refueling is three or more.

In S2, if the number of nozzles n currently being refueled is 3 or more (n ≧ 3), each of the weighing machines 2 to 2
4 is within the range of the total discharge amount when the two in-oil pumps 18A and 18B are simultaneously driven.
To drive the oil pumps 18A and 18B. Then, the oil liquid sent from the oil pumps 18A and 18B is
Discharge pipeline 19A, 19B, common pipeline 21, branch pipeline 22
Is supplied to the (22 ₁ to 22 ₃₎ through the respective weighing machines 2-4 oil supply conduit 11 (11 ₁ to 11 _3). Therefore, the operator filling nozzle 7 (7 ₁ to 7 ₃₎ of the fuel tank of an automobile parked in the fueling area by the nozzle lever to open operation (not shown) in-oil pump 18A, 18B
The oil liquid fed by the is supplied.

In the next S4, it is determined whether or not the number n of nozzles during refueling is two or less. If the number n of nozzles is not less than 2 in S4, the number of nozzles n during refueling has not changed, so the flow returns to S3, and the two oil pumps 18A and 18B are driven. However, in S4, if one of the fuel supply nozzle 7 of the weighing machine 2-4 (7 ₁ to 7 ₃₎ is returned to the nozzle seat 9 (9 ₁ to 9 ₃₎ refueling is completed, the number of nozzles in the refueling Since n is reduced to two, the total refueling amount of each of the weighing machines 2 to 4 becomes one oil pump 18A or 1
8B is within the range of the total discharge amount when driving. In this case, the process proceeds to S5, where the remaining amounts of the underground tanks 5A, 5B detected by the liquid level meters 17A, 17B are compared.

In S5, when the remaining amount of the underground tank 5A is smaller than the remaining amount of the underground tank 5B (when the used refueling amount of the underground tank 5A is larger than the underground tank 5B), the process proceeds to S6, The pump 18A in the oil in the underground tank 5A with little water is stopped. In this case, the stored oil liquid in the underground tank 5B having a large remaining amount is supplied and supplied by the oil pump 18B.

In the next S7, the number n of nozzles currently being refueled
Check if there are three or more. In S7, if the number n of nozzles currently being refueled is three or more, the process returns to S3 described above, and the two oil pumps 18A, 1
8B are driven simultaneously. However, if the number n of the currently refueling nozzles is two or less in S7, the process proceeds to S8, and it is checked whether the number n of the currently refueling nozzles is zero. If n = 0 in this S8, it means that the fuel is still being refueled, so the flow returns to S7, and it is checked again whether or not the current number of nozzles n being refueled is three or more. Therefore, when the number of nozzles n during refueling is one or two, S
7. The processing of S8 is repeated.

If n = 0 in S8, the refueling by all the weighing machines 2 to 4 has been completed, so the process proceeds to S9, and the oil pump 18B of the underground tank 5B is stopped. This ends the current processing and returns to S1 again.
Further, in S5, when the remaining amount of the underground tank 5A is larger than the remaining amount of the underground tank 5B (when the used cumulative refueling amount of the underground tank 5A is smaller than the underground tank 5B), S10 is performed.
Submersible pump 5 for underground tank 5B
Stop 8B. In this case, the stored oil liquid in the underground tank 5B having a large remaining amount is supplied and supplied by the oil pump 18B.

In the next step S11, it is checked whether or not the number n of nozzles currently being refueled is three or more, similarly to the above-mentioned step S7. In S11, the number n of nozzles currently being refueled
If there are three or more, the flow returns to S3 described above, and the two oil pumps 18A and 18B are simultaneously driven. However, if the number n of the currently refueling nozzles is two or less in S11, the process proceeds to S12, and it is checked whether the number n of the currently refueling nozzles is zero. In this S12, n
If = 0, it means that the fuel is still being refueled, so the flow returns to S11, and it is checked again whether or not the current number of nozzles n being refueled is three or more. Therefore, when the number of nozzles n during refueling is one or two, the processing of S11 and S12 is repeated.

If n = 0 in S12, the refueling in all the weighing machines 2 to 4 has been completed, so that S13
To stop the submersible pump 18A of the underground tank 5A. This ends the current processing and returns to S1 again.
Further, in S2, the number n of nozzles currently being refueled
If not more than three (n <3), the total refueling amount of each of the weighing machines 2 to 4 is within the range of the total discharge amount when one oil pump 18A is driven at the same time. Proceeds, and each underground tank 5 detected by the liquid level gauge 17A, 17B
The remaining amounts of A and 5B are compared.

In S14, when the remaining amount of the underground tank 5A is larger than the remaining amount of the underground tank 5B (when the used refueling amount of the underground tank 5A is smaller than that of the underground tank 5B), the process proceeds to S15 and the remaining amount is returned. The submersible pump 18A of the large underground tank 5A is driven. In the next S16, it is checked whether or not the number n of the nozzles currently being refueled is three or more as in S11 described above. In S16, if the current number of nozzles n during refueling is three or more, the process returns to S3, and the two in-oil pumps 18A and 18B are simultaneously driven.

However, if the number n of the currently refueling nozzles is two or less at S16, the process proceeds to S17, and it is checked whether the number n of the currently refueling nozzles is zero. This S
If n is not 0 at 17, it means that the fuel is still being refueled, so the flow returns to S 16, and it is checked again whether or not the current number of nozzles n being refueled is three or more. Therefore, when the number of nozzles n during refueling is one or two, S16, S16
Step 17 is repeated.

If n = 0 in S17, refueling in all the weighing machines 2 to 4 has been completed, so that S18
To stop the submersible pump 18A of the underground tank 5A. This ends the current processing and returns to S1 again.
In S14, when the remaining amount of the underground tank 5A is smaller than the remaining amount of the underground tank 5B (the underground tank 5A
When the used refueling amount is larger than the underground tank 5B), S
Go to 19, pump 1 in oil in underground tank 5B with large remaining
8B is driven.

In the next step S20, it is checked whether or not the number n of nozzles currently being refueled is three or more. In S20, if the current number of nozzles n during refueling is three or more, the process returns to S3 described above, and the two in-oil pumps 18A, 1
8B are driven simultaneously. However, when the number n of the nozzles currently refueling is two or less in S20, the process proceeds to S21, and it is checked whether the number n of the nozzles currently refueling is zero. In this S21, if n = 0, it means that the fuel is still being refueled, so the flow returns to S20, and it is confirmed again whether or not the current number of nozzles n being refueled is three or more.
Therefore, when the number of nozzles n during refueling is one or two, the processing of S20 and S21 is repeated.

If n = 0 in S20 and S21, the refueling by all the weighing machines 2 to 4 has been completed, so the process proceeds to S22 and the oil pump 18B of the underground tank 5B is stopped. This ends the current processing and returns to S1
Return to In this way, the number of nozzles n during refueling is checked, and two in-oil pumps 1 are selected according to the number n of nozzles at that time.
8A and 18B are simultaneously driven, or the oil pumps 18A and
In order to drive any one of 18B, an amount of oil liquid corresponding to the total amount of oil supplied by the measuring machines 2 to 4 can be sent. Therefore, when the number of nozzles is n = 1, the two oil pumps 18A and 18B are simultaneously driven to prevent excessive oil liquid discharge. That is, in this embodiment, since the number of activated oil pumps 18A and 18B is switched according to the number of simultaneously used oil supply nozzles of the weighing machines 2 to 4, the power consumption can be suppressed and the burden on the oil pumps 18A and 18B. And the pump life can be extended.

When only one of the two pumps 18A and 18B is driven, the level gauges 17A and 18B are driven.
The remaining amounts of the underground tanks 5A and 5B detected by 17B are compared, and the in-oil pumps 18A and 18B with the larger remaining amount, that is, the smaller used cumulative refueling amount, are driven. For this reason, it is possible to prevent the used cumulative refueling amount of the underground tanks 5A, 5B from being biased toward one of them, and to equalize the remaining amount of the underground tanks 5A, 5B, thereby reducing the number of times of delivery by the tank truck.

In the above-described embodiment, a ground-type refueling device has been described as an example. However, the present invention is not limited to this, and it is needless to say that the present invention can be applied to a suspension type refueling device that raises and lowers a refueling nozzle. In the above embodiment, a combination of three weighing machines and two underground tanks is given as an example. However, a configuration in which three or more weighing machines or two or more underground tanks of a single oil type are installed. It is needless to say that the present invention can be applied also to the above-mentioned one.

Further, in the above-described embodiment, the configuration in which the submersible pump is inserted into the underground tank storing the oil liquid of a single oil type is described as an example. However, the present invention is not limited to this. Of course, the present invention can also be applied to a configuration in which the stored oil liquid is supplied. Further, in the present embodiment, the number of nozzles for simultaneously driving the submersible pumps 18A and 18B is set to three, but it is needless to say that the number of nozzles can be appropriately set according to the discharge capacity of the submersible pump.

[0033]

As described above, according to the first aspect of the present invention,
Since the number of driven pumps is switched and controlled in accordance with the number of nozzles used according to the signal from the nozzle use detecting means, it is possible to efficiently operate a plurality of pumps and to consume a plurality of tanks of a single oil type. The amount can be equalized. Therefore, when unloading from a tank truck, it is sufficient to unload a certain amount of each tank, which makes it easy to work and reduces the number of times of unloading. In addition, since the number of pumps to be driven is controlled in accordance with the number of weighing machines used, power consumption can be reduced, and the load on the pump can be reduced to extend the life of the pump.

According to the second aspect of the present invention, one pump is selected from a plurality of pumps and started based on the used cumulative refueling amount of each tank or the remaining amount of each tank. The power can be reduced, and the load on the pump can be reduced to extend the life of the pump.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an embodiment of a fuel supply device according to the present invention.

FIG. 2 is a block diagram showing each device of the refueling device according to the present invention.

FIG. 3 is a flowchart of a control process executed by an in-oil pump control device 26;

[Explanation of symbols]

1 lubricator 2-4 weighing machine 5A, 5B underground tanks 6 Okuekikanro 7 (7 ₁ to 7 ₃₎ fueling nozzle 8 (8 _{1-8 3)} oil supply hose 9 (9 ₁ to 9 ₃₎ nozzle seat 10 ( 10 ₁ to 10 ₃₎ nozzle switch 11 (11 ₁ to 11 ₃₎ the oil supply pipe 12 (12 ₁ to 12 ₃₎ flow meter 15 (15 ₁ to 15 ₃₎ control circuit 17A, 17B level gauge 18A, 18B oil Pump 25 Liquid level controller 26 Pump control device in oil

Claims (2)

[Claims] 1. A plurality of oil supply nozzles for discharging a single oil type oil liquid, a nozzle use detecting means for detecting whether or not the oil supply nozzle is used, and a single oil type oil liquid is stored. Pumps provided in the plurality of tanks, a liquid feeding pipeline connecting the plurality of pump discharge ports and the inflow ports of the plurality of refueling nozzles, and a nozzle used by a signal from the nozzle use detection means Control means for controlling the number of pumps to be driven in accordance with the number of pumps. 2. The fuel supply device according to claim 1, wherein the control means selects one pump from a plurality of pumps based on a used cumulative refueling amount or remaining amount of each tank and starts the pump. A refueling device characterized by being made to work.