JP2002193397A - Refueling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine the kind of oil unloaded to an underground tank by means of an existing equipment. SOLUTION: When new oil is unloaded to an underground tank 28, a control circuit 55 of a refueling device 41, at a first refueling, opens or closes a solenoid valve 51 to measure the excessive amount of oil and determines the kind of oil unloaded to the tank 28 based on the excessive amount of oil. When it is judged that oil of different kind has been erroneously unloaded to the tank 28, the circuit 55 prohibits oil from being supplied from the tank 28. Thus, there is no need to provide an oil sensor in the tank 28 in an existing equipment, and the kind of oil from the tank 28 can be determined, and hence the increase of components can be avoided, reducing equipment costs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling apparatus, and more particularly, to a method in which when an oil tanker truck unloads an oil liquid into an underground tank installed at a gas station, the type of oil introduced into the underground tank is regulated. The present invention relates to a refueling device configured to be able to determine an oil type.

[0002]

2. Description of the Related Art In a refueling facility such as a gas station, an underground tank for storing an oil liquid is installed, and a weighing machine for refueling a vehicle with the oil liquid pumped from the underground tank is installed. The underground tank is installed for each oil type (for example, regular gasoline, high-octane gasoline, light oil, kerosene, etc.).

When unloading from a hatch loaded with each oil type, the driver of the tank truck checks that the oil type of the hatch matches the oil type of the underground tank before unloading the oil liquid. However, depending on the driver, an oil liquid of an oil type different from the oil type of the underground tank may be unloaded by mistake. In this way, when an oil liquid of an oil type different from the regular oil type is unloaded into the underground tank, for example, light oil is supplied to a fuel tank of a vehicle using gasoline as fuel, or light oil is used as fuel. There is a possibility that gasoline will be supplied to the fuel tank of the vehicle.

[0004] As a method for preventing the occurrence of mixing of different oil species (contamination) in a fuel tank of such a refueled vehicle, an oil type sensor for detecting an oil type is provided in each underground tank. There is a method of automatically detecting the unloaded oil type by determining the presence or absence of a different oil type mixing accident (contamination), and stopping the oil supply pump based on the determination result.

[0005]

However, in the configuration using the oil type sensor as described above, the oil type sensor must be attached to each of the underground tanks, and the number of parts increases accordingly. Is complicated and maintenance and inspection work are increased so that the oil type sensor does not break down, so that maintenance is troublesome.

Further, it is difficult to install an oil type sensor in an underground tank of an existing refueling facility, and there is a problem that the cost required for the improvement work increases when performing equipment improvement work for oil type determination. Therefore, an object of the present invention is to provide a refueling device that solves the above problems.

[0007]

In order to solve the above problems, the present invention has the following features.

According to the first aspect of the present invention, it is determined whether or not the oil type charged into the tank is a regular oil type based on an excessive amount of the oil liquid discharged from the oil supply nozzle, and the oil is supplied from the tank. If the selected oil type is not the proper oil type, the supply of the oil liquid is prohibited, and the oil type can be determined without changing the existing equipment.

Further, the invention according to claim 2 performs the oil type discrimination at the start of the first refueling after the oil liquid is supplied to the tank, and it is necessary to perform the oil type discrimination every time the oil is supplied. Therefore, the efficiency of the refueling process can be increased.

Further, the invention according to claim 3 performs the oil type discrimination each time the liquid level gauge of the tank detects a rise in the liquid level. Therefore, it is not necessary to perform the oil type discrimination every time the fuel is supplied. The efficiency of the refueling process can be increased accordingly.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a fuel supply apparatus according to an embodiment of the present invention; FIG. 1 is a schematic configuration diagram showing one embodiment of an unloading system to which a refueling device according to the present invention is applied. As shown in FIG. 1, a tank truck 1
1, tank 14 which is defined in a plurality of hatches ₁₂ 1 to 12 _n are mounted. Each hatch 12 ₁ to 12 _n, respectively 1 kg liter 2 kiloliters have different capacities such 4 kg liter oil type in accordance with the order from the gas station is loaded. Each hatch ₁₂ 1 to 12 _n
Has a hatch level gauge 16 ₁ that detects the amount of oil loaded.
１６16 _n are provided.

Then, each hatch 12₁~ 12_nAt the bottom of
Is a bottom valve 18 that is opened at the time of unloading. ₁~ 18_nIs arranged
Have been. Bottom valve 18₁~ 18_nWith the front of the tank 14
It communicates with discharge ports 20 and 21 provided at the rear.
Further, upstream of the discharge ports 20 and 21, a discharge
Valves 22 and 23 are provided. Discharge port 2 when unloading
One end of unloading hoses 24, 26 is connected to 0, 21.
It is. The other ends of the unloading hoses 24 and 26 are refueled.
2 for underground tanks 28-30 buried underground
8a to 30a. Therefore, unloading
Sometimes bottom valve 18₁~ 18_nOne of the valves was opened
After that, the opened bottom valve 18₁~ 18_nDischarge valve 2 corresponding to
By opening one of the valves 2, 23,
Unloading to the stores 28 to 30 is started.

Each of the underground tanks 28 to 30 is provided with a liquid level gauge 32 for measuring the storage amount. The data of the storage amount of each of the underground tanks 28 to 30 measured by the liquid level gauge 32 is stored in the liquid level gauge controller 34, and is transferred to the unloading computer 36 of the tank truck 11 at the time of unloading. In the present embodiment, the level gauge controller 34 having a microcomputer functions as a delivery destination computer. When the tank lorry vehicle 11 arrives at the service station, the unloading computer via the communication cable 35. 36.

Oil filling keys 28b-3 for transmitting signals indicating the type of oil stored in each of the underground tanks 28-30 to the tank truck 11 are provided at the oil filling ports 28a-30a.
0b is provided. The oil type keys 28b to 30b are connected to connectors (not shown) provided on the unloading hoses 24 and 26, and are unloaded via signal cables (not shown) built in the unloading hoses 24 and 26. Connected to computer 36. Bottom valve ₁₈ 1 ~ 18 _n provided at the bottom of the hatch ₁₂ 1 to 12 _n are opened individually at the time of unloaded, are closed operated by the end of unloading.

FIG. 2 is a configuration diagram of one embodiment of the oil supply device according to the present invention. As shown in FIG. 2, the refueling device 41 is installed at a refueling site of a gas station, and a refueling hose 45 connected to a refueling nozzle 43 is drawn out from a side surface of the device body 42. The refueling nozzle 43 is normally hung on a nozzle hook 44 provided on a side surface of the apparatus main body 42. For example, when a customer's automobile arrives at a gas station, an operator removes the refueling nozzle 43 from the nozzle hook 44 and discharges. A pipe 47 is inserted into a fuel supply port 46a of a fuel tank 46 of an automobile to perform refueling. The refueling nozzle 43 has a nozzle body 43b having a built-in valve mechanism that is opened by operating the operation lever 43a.
Is connected to an oil supply hose 45.

In the apparatus main body 42, an oil supply hose 45 is provided.
Is connected to the liquid feed line 50. The liquid feed pipe 50 extends and is inserted to the underground tank 28, and a solenoid valve 51, a pump 52, and a flow meter 54 are provided in the middle thereof. A refueling amount indicator 5 is provided on the front surface of the device main body 42.
6 are provided.

The liquid level gauge 3 of the underground tank 28
2. Nozzle switch 44a of nozzle hook 44, solenoid valve 5
1. The pump motor 52a of the pump 52, the flow rate pulse transmitter 54a of the flow meter 54, and the refueling amount display 56 are connected to the control circuit 55.

The control circuit 55 opens the solenoid valve 51 and activates the pump motor 52a of the pump 52 when the refueling nozzle 43 is removed from the nozzle hook 44 and a signal from the nozzle switch 44a is input. Underground tank 28
Pump up the oil inside. When the operation lever 43a of the refueling nozzle 43 is operated, refueling of the fuel tank 46 is started, and a flow pulse is output from the flow pulse transmitter 54a of the flow meter 54 to the control circuit 55.

Then, the control circuit 55 integrates the flow rate pulses output from the flow rate pulse transmitter 54a and causes the refueling amount display 56 to display the refueling amount. Also, the control circuit 55
Performs a full tank refueling control or a preset refueling control and a control for inching (intermittent refueling) as described later.

In the memory of the control circuit 55, a storage area (storage means) for storing information relating to the type of oil stored in the underground tank 28, and an excess amount of oil discharged from the oil supply nozzle 23 is measured. Control program I for
(Measurement means), a control program II (determination means) for determining whether or not the oil type charged into the underground tank 28 is a regular oil type based on the excessive amount of the oil liquid, and an underground tank 2
A control program III (prohibiting means) for prohibiting the supply of the oil liquid when the oil type supplied from 8 is not a regular oil type is stored.

Here, the case of refueling a predetermined amount (preset amount) specified by the customer will be described.

FIG. 3 is a graph showing a change in refueling flow rate during preset refueling. After the operator operates the preset switch to set the preset oil supply amount, the operator operates the operation lever to the valve open position to lock the lever hook on the lever hook. Then, the controller 55 integrates the flow rate pulses output from the flow rate transmitter 54a of the flow meter 54, and terminates refueling when the preset refueling amount is reached. The refueling flow rate according to such a preset refueling operation changes as shown in FIG.

When performing preset lubrication, if the pump motor 52a of the pump 52 is stopped after the integrated value of the flow pulse reaches the preset lubricating amount, the actual lubricating amount exceeds the preset value, so that accurate preset lubricating is performed. Can not do. Therefore, according to the inching (intermittent refueling) method, when the preset refueling amount is set,
When the refueling nozzle 23 is removed from the nozzle hook 44 (T ₁ ), the pump motor 52a of the pump 52 is started and the solenoid valve 51 is opened. When the operator opens operate the nozzle lever 43a, fueling is started main valve of the fueling nozzle 23 is opened (T _2). Then, the solenoid valve 51 is once closed when a certain refueling amount is reached. It is determined from the overshoot amount at this time whether or not the oil type matches a registered oil type.

If the determined oil type matches the registered oil type as a result of the oil type determination, the solenoid valve 51 is opened again to start refueling (T ₃ ). Then, the refueling amount immediately before the preset preset value (for example, 0.3
(T ₄ ) When the fuel is refilled (T ₄ ), the solenoid valve 51 is closed, the pump motor 52a is stopped, and then the solenoid valve 51 is opened and closed intermittently (“inching”) in consideration of the overshoot. ) Is performed a plurality of times to perform refueling at a minute flow rate so that the refueling amount of the preset value is accurately refueled.

In this embodiment, when the new oil liquid is unloaded into the underground tank 28, the control circuit 55 closes the valve by opening and closing the solenoid valve 51 at the time of the first refueling as described later. The amount of overshoot later is measured, and the type of oil unloaded into the underground tank 28 is determined based on the amount of overshoot. When it is determined that the oil liquid of a different oil type is unloaded by mistake in the underground tank 28, the control circuit 55 prohibits refueling from the underground tank 28.

Here, the control processing executed by the control circuit 55 of the fueling device 41 will be described. FIG.
5 is a flowchart for explaining a first embodiment of a control process executed by the control circuit 55 of FIG. FIG. 5 is a flowchart of a process executed after the process of FIG. As shown in FIG. 4, when the power is turned on, the control circuit 55 initializes in step S11 (hereinafter, “step” is omitted), that is, resets each variable to zero. In the next step S12, it is checked whether or not the nozzle switch 44a of the nozzle holder 44 has been turned on. In S12, when the operator removes the refueling nozzle 23 from the nozzle hook 44, the nozzle switch 44a is turned on. Therefore, the process proceeds to S13, where the pump motor 52a of the pump 52 is started and the solenoid valve 51 is opened.

When the operator opens the nozzle lever 43a, the main valve of the refueling nozzle 23 is opened to start refueling. Subsequently, in S14, the flow transmitter 54 of the flow meter 54
The flow rate pulse output from a is integrated, the refueling amount V is counted, and the instantaneous discharge amount (instantaneous flow rate) Q is calculated. In the next S15, it is checked whether or not the nozzle switch 44a of the nozzle holder 44 has been turned off. S15
When the operator returns the refueling nozzle 23 to the nozzle hook 44, the nozzle switch 44a is turned off, and the current refueling process ends. However, in S15, the process proceeds to S13, where the nozzle switch 4
When 4a is off, the routine proceeds to S16, where the refueling amount V is 1
Make sure it is at least liters. Then, in S16, when the refueling amount V is 1 liter or more, S1
The program proceeds to step 7, where the instantaneous discharge amount (instantaneous flow rate) Q at that time is stored in the memory, and the solenoid valve 51 is closed.

In the next step S18, after the solenoid valve 51 is closed, the flow pulses output from the flow transmitter 54a of the flow meter 54 are integrated, and the overshoot X is counted. Then, in S19, it is checked whether or not the input of the flow pulse from the flow transmitter 54a of the flow meter 54 has been completed.
In S19, when there is a flow rate pulse input, S1
8, the overshoot amount X is counted, and if there is no input of the flow rate pulse, the process proceeds to S20 shown in FIG. 5 and the oil type is determined based on the value of the instantaneous discharge amount (instantaneous flow rate) Q and the overshoot amount X. judge.

In step S19, a method for determining when there is no flow pulse input is, for example, the above-described step S17.
A method of determining that the flow rate pulse has stopped assuming that the overshoot amount has stopped after a predetermined time (e.g., 5 seconds) has elapsed since the execution of the process, or monitoring the number of pulses generated per unit time over time. Then, there is a method of determining that the flow pulse has stopped when the pulse interval becomes 1 second or longer.

Since the oil types have different viscosities, for example, the relationship between the excess amount of gasoline Xa, the excess amount of kerosene Xb, and the excess amount of light oil Xc is Xa <Xb <Xc. Then, the overshoot amount Xa,
By storing Xb and Xc, it becomes possible to determine the oil type from the measured value of the overshoot amount.

In S21, the oil type determined based on the value of the instantaneous discharge amount (instant flow rate) Q and the value of the overshoot amount X in S20 is the same as the oil type registered as the oil type of the underground tank 28. Check if they are the same oil type. In S21, if the discrimination oil type does not match the registered oil type in the underground tank 28, the process proceeds to S22, where the pump motor 52a of the pump 52 is stopped to prohibit refueling of the oil type, and the oil is displayed on the display unit. A seed error is displayed to notify the operator.

In the next step S23, it is checked whether or not the nozzle switch 44a of the nozzle hook 44 has been turned off. In S23, when the operator returns the refueling nozzle 23 to the nozzle hook 44, the nozzle switch 44a is turned off, so the process proceeds to S24, and the refueling from the underground tank 28 is set to the prohibited state. Thus, the gas station recognizes that the oil type unloaded to the underground tank 28 is a different oil type, and arranges to replace the oil liquid in the underground tank 28 with a regular oil type.

In S25, the liquid level signal measured by the liquid level gauge 32 provided in the underground tank 28 is read, and it is confirmed that the liquid level in the underground tank 28 has dropped to the zero position. In the subsequent S26, the underground tank 2
The liquid level signal measured by the liquid level gauge 32 provided at 8 is read to confirm that the liquid level in the underground tank 28 has risen from zero to a predetermined position. Thereby, it is confirmed that the oil liquid in the underground tank 28 has been replaced with the regular seed oil. In the next step S27, since the oil liquid in the underground tank 28 has been exchanged, the prohibition of refueling is released to allow refueling from the underground tank 28.

In S21, the oil type determined based on the value of the instantaneous discharge amount (instantaneous flow rate) Q and the value of the overshoot amount X is the oil type registered as the oil type of the underground tank 28. If they match, the oil type unloaded into the underground tank 28 is a regular oil type, so the process proceeds to S28, where the solenoid valve 51 is opened to switch to a state in which oil can be supplied. In the next step S29, the refueling amount V is obtained by integrating the flow rate pulses output from the flow rate transmitter 54a of the flow meter 54, and the refueling amount display 56 displays the refueling amount V.

In the next step S30, it is checked whether or not the nozzle switch 44a of the nozzle hook 44 has been turned off. In S30, when the nozzle switch 44a is ON, the refueling nozzle 23 has not been returned to the nozzle hook 44, so the flow returns to S29 to continue the refueling process.
However, when the operator returns the refueling nozzle 23 to the nozzle hook 44 in S30, the nozzle switch 44a is turned off, so that the current refueling process is terminated.

Thus, at the start of refueling, the underground tank 28
It is possible to determine whether or not a regular oil type is supplied by discriminating the oil type from the excess amount of the oil liquid supplied from, and comparing the determined oil type with the registered oil type. Even if another oil type is unloaded by mistake in the underground tank 28, it is possible to prevent the fuel tank 26 of the vehicle from being supplied with a different oil type at the time of refueling. Therefore, underground tank 2
8, it is possible to judge the oil type of the oil liquid from the underground tank 28 without using an oil type sensor even with existing equipment, thereby preventing an increase in the number of parts and reducing the cost of the equipment. .

FIG. 6 is a flowchart for explaining the control processing of the first modification. In FIG. 6, the same processes as those in FIG. 5 described above are the same as those in FIG. As shown in FIG. 6, in S21a instead of S21 in FIG. 5, it is checked whether or not the overshoot amount X this time and the overshoot amount Y during the previous refueling are substantially the same value. When X ≒ Y in S21a, it is determined that the current oil type matches the oil type registered as the oil type of the underground tank 28, and the oil type unloaded into the underground tank 28 It is determined that it is an oil type, and the process proceeds to S28,
The solenoid valve 51 is opened to switch to a state in which refueling is possible. In this oil type determination method, there is no need to register the oil type, and the excess amount Y at the previous refueling is used as a reference value and compared with the current excess amount X to determine whether the current oil type is a regular oil type. Can be determined.

FIG. 7 is a flowchart for explaining the control processing of the second modification. In FIG. 7, the same processes as those in FIG. 4 described above are the same as those in FIG. As shown in FIG. 7, in the second modification, S12
In step S13, when the operator removes the refueling nozzle 23 from the nozzle hook 44 and turns on the nozzle switch 44a,
Then, the pump motor 52a of the pump 52 is started, and the solenoid valve 51 is opened. Thereafter, the process proceeds to S51, where it is checked whether the mode is the oil type determination mode. In S51, when the reset switch (not shown) is off, the oil type determination mode is set, so that S14
The subsequent oil type determination processing is executed. However, when the reset switch (not shown) is turned on in S51, the oil type determination mode has been reset, so the oil type determination process is omitted, and the process proceeds to S28 to perform the refueling process.

In this case, when the person in charge of the refueling station switches on or off a reset switch (not shown), the oil type is determined each time, or after the first oil type is determined, the oil type is determined. The processing can be arbitrarily switched so as to omit the processing.

FIG. 8 is a flowchart for explaining the control processing of the third modification. In FIG. 8, the same processes as those in FIG. 4 described above are the same as those in FIG. As shown in FIG. 8, in the third modification, S12
In step S13, when the operator removes the refueling nozzle 23 from the nozzle hook 44 and turns on the nozzle switch 44a,
Then, the pump motor 52a of the pump 52 is started, and the solenoid valve 51 is opened. Thereafter, the process proceeds to S52, and it is determined whether or not the liquid level in the underground tank 28 has increased based on the liquid level detection signal input from the liquid level gauge 32 of the underground tank 28. In S52, when it is detected that the liquid level in the underground tank 28 has risen, the underground tank 2
It is determined that the oil liquid has been unloaded at 8. In that case, S1
The fourth and subsequent oil type determination processes are executed. However, if the rise in the liquid level in the underground tank 28 is not detected in S52, the unloading to the underground tank 28 has not been performed, so the oil type determination process is omitted, and the process proceeds to S28 to perform the refueling process. .

In this case, the necessity of oil type determination processing is determined based on the presence or absence of a rise in the liquid level in the underground tank 28. When the rise in the liquid level in the underground tank 28 is detected, the oil type is automatically determined. A determination can be made. Further, when the rise in the liquid level in the underground tank 28 is not detected, the oil type determination processing can be omitted to refuel.

Next, a second embodiment will be described. FIG.
FIG. 4 is a configuration diagram showing a schematic configuration of a second embodiment. As shown in FIG. 9, the plurality of refueling devices 41 and 41 ′ are configured so that the oil liquid is supplied from the same underground tank 28 to a refueling system of the same oil type. That is, the common conduit 61 is inserted into the underground tank 28, and the upper end of the common conduit 61 is branched into branch conduits 62, 63 connected to the respective fueling devices 41, 41 '. For this reason, the oil liquid in the underground tank 28 is supplied to each of the oil supply devices 41 and 41 ′. Therefore, when a different oil type mixing accident (contamination) occurs in the underground tank 28, one oil supply device 4
It is necessary to transmit the result of the first oil type determination processing to the other refueling devices 41 ′ and set the refueling prohibition in each of the refueling devices 41 and 41 ′.

FIG. 10 is a flowchart for explaining a second embodiment of the control processing executed by the control circuit 55 of the fueling device 41. FIG. 11 is a flowchart of a process executed after the process of FIG. In FIGS. 10 and 11, the same processes as those in FIGS. 4 and 5 described above are the same steps and will not be described. As shown in FIG. 10, the control circuit 55 determines in S12 that the operator removes the refueling nozzle 23 from the nozzle hook 44 and
When 4a is turned on, the process proceeds to S53, where the other lubrication devices 41
Reads information (transmission data) transmitted from. Next S
At 54, it is checked whether or not the other refueling device 41 is in a refueling prohibited state. In S54, when the other refueling device 41 is not in the refueling prohibition state, the oil type determination process in S13 and thereafter is executed. However, in S54, other refueling devices 41
Is in the refueling prohibited state, the process proceeds to S55, in which the refueling device 41 also sets the refueling from the underground tank 28 to the prohibited state, and displays an oil type error on the display to notify the operator.

In the next step S56, it is checked whether or not the nozzle switch 44a of the nozzle holder 44 has been turned off. In S56, when the nozzle switch 44a is turned off, it is possible to confirm that the operator has returned the refueling nozzle 23 to the nozzle hook 44, and thus the current processing is terminated.

In S21 shown in FIG. 11, the oil type determined based on the value of the instantaneous discharge amount (instant flow rate) Q and the value of the overshoot amount X is registered as the oil type of the underground tank 28. Check if the oil is the same as the seed.
In S21, if the discrimination oil type does not match the registered oil type of the underground tank 28, the process proceeds to S57, and the other oil supply devices 4 receiving the supply of the oil liquid from the same underground tank 28
The information (signal) of refueling prohibition is transmitted to 1 '. Then, S
Proceeding to 22, the pump motor 52a of the pump 52 is stopped to prohibit refueling of the oil type, and an oil type error is displayed on the display unit to notify the operator.

When the replacement of the oil in the underground tank 28 is completed in S23 to S26, the prohibition of refueling is released in S27, and the process proceeds to S58, where the information (signal) for releasing the prohibition of refueling is transmitted to another refueling device 41 '. Send

As described above, the plurality of refueling devices 41, 41 '
In the case where the oil liquid is supplied from the same underground tank 28, the signals for refueling prohibition and refueling prohibition are mutually transmitted and received between the refueling devices 41 and 41 ', and the oil type is determined by another refueling device. The result can be enjoyed as common information. For this reason, when the plurality of refueling devices 41 and 41 ′ detect the occurrence of a different oil type mixing accident (contamination) in the underground tank 28 by another refueling device, the plurality of refueling devices By setting the refueling prohibition, the efficiency of the oil type determination processing can be improved. In the above-described embodiment, the fuel supply device for supplying fuel to the fuel tank of the vehicle has been described as an example. .

As described above, according to the first aspect, it is determined whether or not the oil type charged into the tank is a regular oil type based on the excessive amount of the oil liquid discharged from the oil supply nozzle. However, when the oil type supplied from the tank is not a regular oil type, the supply of the oil liquid is prohibited, so that the oil type can be determined without changing existing equipment.

According to the second aspect of the present invention, since the oil type is determined at the start of the first refueling after the oil liquid is introduced into the tank, it is necessary to perform the oil type determination every time the oil is supplied. Therefore, the efficiency of the refueling process can be increased.

According to the third aspect of the present invention, the oil type is determined each time the liquid level gauge of the tank detects a rise in the liquid level. Therefore, it is not necessary to determine the oil type every time the fuel is supplied. The efficiency of the refueling process can be increased accordingly.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an unloading system to which a refueling device according to the present invention is applied.

FIG. 2 is a configuration diagram of one embodiment of a refueling device according to the present invention.

FIG. 3 is a graph showing a change in refueling flow rate during preset refueling.

FIG. 4 is a flowchart for explaining a first embodiment of a control process executed by a control circuit 55 of the refueling device 41.

FIG. 5 is a flowchart of a process executed after the process of FIG. 4;

FIG. 6 is a flowchart illustrating a control process according to a first modification.

FIG. 7 is a flowchart illustrating a control process according to a second modification.

FIG. 8 is a flowchart illustrating a control process according to a third modification.

FIG. 9 is a configuration diagram illustrating a schematic configuration of a second embodiment.

FIG. 10 is a flowchart for explaining a second embodiment of the control processing executed by the control circuit 55 of the refueling device 41.

FIG. 11 is a flowchart of a process executed after the process of FIG. 10;

[Explanation of symbols]

11 tank lorry vehicle 12 ₁ to 12 _n hatch 14 tank 18 ₁ ~ 18 _n bottom valve 20, 21 discharge ports 22 and 23 discharge valve 24, 26 unloading hoses 28-30 underground tanks 28a~30a oil port 32 level gauge 34 fluid Surface gauge controller 36 Unloading computer 41, 41 'Refueling device 43 Refueling nozzle 43a Operating lever 44 Nozzle hook 44a Nozzle switch 45 Refueling hose 46 Fuel tank 47 Discharge pipe 50 Liquid feeding pipeline 52 Pump 52a Pump motor 54 Flowmeter 55 Control circuit

Claims (3)

[Claims] 1. An oil supply device having a liquid supply means for supplying an oil liquid stored in a tank to an oil supply nozzle, wherein: storage means for storing information on an oil type stored in the tank; Measuring means for measuring the overshoot amount of the discharged oil liquid; and determining whether or not the oil type charged into the tank is a regular oil type based on the overshoot amount of the oil liquid measured by the measuring means. And a prohibition unit for prohibiting the supply of the oil liquid when the type of oil supplied from the tank by the determination unit is not a regular oil type. 2. The refueling apparatus according to claim 1, wherein said discriminating means performs an oil type discrimination at a start of a first refueling after the oil liquid is supplied to the tank. 3. The refueling apparatus according to claim 1, wherein said discriminating means performs oil type discrimination each time a liquid level gauge of said tank detects a rise in liquid level.