JP2561953B2 - Refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oil supply nozzle in which an oil supply hose is connected to the tip of a pipe in which a pump and a flow meter are interposed, and a liquid level sensor is provided at the end of the oil supply hose. Installation and lubrication system with a nozzle switch provided on the nozzle hook of the refueling nozzle and the nozzle removal signal from the nozzle switch to start refueling, and the refueling stop means to stop refueling in response to the liquid detection signal from the liquid level sensor. However, the refueling restart discharge rate is determined based on the relationship between the discharge rate immediately before the refueling stop, the discharge rate before the refueling stop stored in the storage means, and the discharge rate when the refueling is restarted. The present invention relates to a refueling device including: a refueling control device that automatically restarts refueling in step 1, and terminates refueling after stopping refueling on a plurality of floors.

[Prior Art] Conventionally, in a fueling station such as a gas station, when refueling a fuel tank of an automobile, when a liquid level sensor provided at the tip of a refueling nozzle detects the liquid level, refueling is performed by the output of the liquid level sensor. It is supposed to stop. However, at the time of refueling work, the liquid level sensor is not the liquid level, and the refueling is stopped even if bubbles or splashes are detected. It is disclosed by the applicant in Japanese Patent Application Laid-Open No. 58-30998. The refueling pattern in this known technique is shown, for example, in FIG. 5, in which the vertical axis represents the discharge amount per unit time, that is, the instantaneous flow rate Q, and the horizontal axis represents the time T. / min at a rate, the liquid level sensor output stops the fluid supply, and after a certain period of time, refueling is resumed at a discharge rate of 35 / min per unit time, and in the same manner, per unit time The discharge rate of 25 / m
Lubrication is being performed with a discharge rate of in, 15 / min, and 5 / min.
Although such a technique is effective in itself, depending on the structure of the fuel tank, for example, the fuel supply pipe extending from the fuel tank to the fuel tank is curved, and the discharge amount per unit time is 30%.
In the case where the liquid is detected by splashing at / min, the oil is refueled according to the refueling pattern shown in FIG. That is, at the beginning of refueling work, the fuel level is stopped at the output of the liquid level sensor at 30 / min for the _first time, and the second refueling starts after t ₁ hour. Stop and
After t ₂ hours, refueling is performed at the third speed of 25 / min.
In addition, for example, when the liquid is detected by splashing at 20 / min, the pattern is as shown in FIG.
Due to the waiting times t ₁ , t ₂ , and t ₃ and the small discharge amount per unit time, the refueling work time becomes long. The decrease in the discharge amount per unit time is unavoidable due to the structure of the fuel tank, but the above waiting time is useless for the refueling work.

[Problem to be Solved by the Invention] Therefore, an object of the present invention is to reduce the waiting time when refueling is restarted and to shorten the refueling work time when the refueling is stopped at the beginning of refueling, that is, when the discharge amount is halfway. To provide the equipment.

[Means for Solving the Problems] According to the present invention, an oil supply hose is connected to the tip of a pipe in which a pump and a flow meter are interposed, and an oil supply nozzle provided with a liquid level sensor is attached to the end of the oil supply hose to provide oil supply. A nozzle switch is provided on the nozzle hook of the nozzle to start refueling in response to a refueling system and a nozzle disengagement signal from the nozzle switch, and a refueling stop means stops refueling upon receipt of a liquid detection signal from the liquid level sensor. The refueling restart discharge amount is determined based on the discharge amount immediately before the stop and the relationship between the discharge amount before stopping the refueling and the discharge amount when refueling is restarted, which is stored in the storage means. In the lubrication device including a lubrication control device that automatically restarts the fuel supply and terminates the lubrication after stopping the lubrication a plurality of times, the lubrication control device receives a nozzle removal signal from the nozzle switch and determines a discharge amount. Refueling is started while increasing, and it is determined whether the first refueling stop by the refueling stopping means is before the maximum discharge amount, and if the first refueling stop is before the maximum discharge amount, the refueling is stopped. Provided is a refueling device to which refueling control means for restarting refueling is added at a discharge amount that is a fixed amount smaller than the immediately preceding discharge amount without providing a refueling stop time.

In the present specification, the "discharge amount" means the amount of oil supply per unit time.

[Operation] When the amount of discharge per unit time is relatively large at the start of refueling, the structure of the fuel tank causes a splash on the liquid level sensor to stop refueling. When refueling is stopped, refueling is restarted immediately with a discharge amount that is a fixed amount smaller than the discharge amount immediately before the refueling stop, and the liquid level sensor does not get splashed, and the discharge amount does not reach near "full" Refueling is performed in the conventional method, and the waiting time in the related art is eliminated, and the refueling work can be performed quickly.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an oil supply apparatus embodying the present invention, in which oil stored in an underground tank (not shown) is sucked up by a pump 2 housed in a casing 1 through a suction pipe 3 and discharged. It is pumped into the tube 4. The oil pressure-fed to the discharge pipe 4 passes through the flow meter 5 and the flow control valve 6, and is supplied to the oil supply nozzle 8 via the oil supply hose 7. The oil supply nozzle 8 has a liquid level sensor S at its tip. And, the nozzle hook 9 of the refueling nozzle 8 has a nozzle.
10 is provided, and the flow meter 5 is provided with a pulse transmitter 11 that transmits a flow rate pulse signal. The signals from the nozzle switch 10 and the pulse transmitter 11 are sent to the oil supply control device 12 described later. The lubrication amount display signal from the lubrication control device 12 is used to display the lubrication amount on the display unit 13, and the drive signal from the lubrication control device 12 is used to
The pump motor 14 that drives the pump 2 is controlled, and the valve drive motor 16 (for example, a stepping motor) that controls the opening degree of the flow rate control valve 6 is controlled.

FIG. 2 is a block diagram embodying the present invention. When the refueling nozzle 8 is removed from the nozzle hook 9, the ON signal output from the nozzle switch 10 is transmitted to the driving means 15 of the refueling control device 12. , The pump motor 14 is driven, at the same time, the previous count value of the counting means 20 is reset (returned to zero), and further input to the valve opening / closing control means 21 described later. Further, the flow rate signal from the pulse transmitter 11 of the flowmeter 5 is the counting means 20.
Is counted, and the amount of refueling is displayed on the display 13 by the drive means 18. Further, the liquid detection signal from the liquid level sensor S, the counting signal from the counting means 20 and the timing signal from the timing means 22 are input to the valve opening / closing control means 21. This valve opening / closing control means 21
The drive means of the control valve 6 according to the valve opening / closing pattern stored in the storage means 23, that is, the valve opening / closing pattern obtained by changing the start time of refueling of the conventional valve opening / closing pattern shown in FIG. 5 to the valve opening / closing pattern shown in FIG. A valve open / close signal is given to 17. Then, the stepping motor 16 is driven according to the instructed valve opening degree.

Next, the function and action of the oil supply control device 12 of the present invention will be described mainly with reference to FIG. 3 (A), FIG. 3 (B), FIG. 4 and FIG.

The flow of FIG. 3 (A) will be described. To make the explanation easier to understand, it is assumed that when one pulse is sent to the stepping motor 16, the control valve 6 will be in the valve open state of 1 / min.
That is, it is assumed that the number of pulses and the ejection amount / min are the same numerical value.

First, when the fueling nozzle 8 is removed from the nozzle hook 9 and an ON signal is input from the nozzle switch 10 to the fueling control device 12 (step S1), the previous count value of the counting means 20 is reset to zero and the display 13 becomes zero display. Then, the pump motor 14 is driven by the output of the driving means 15, and the valve opening / closing control means 21 sends a driving signal to the driving means 17 so that the stepping motor 16 can
The control valve 6 is driven for a pulse, and the control valve 6 is opened slightly (5 / min) (step S2). The worker inserts the refueling nozzle 8 into the refueling port of the fuel tank of the automobile, latches the valve opening lever of the refueling nozzle 8 at the fully open position, and opens the nozzle valve of the refueling nozzle 8. When refueling starts and the count value of the counting means 20 reaches 0.2 (step S3), the valve opening / closing control means 21 causes the drive means to
Then, the stepping motor 16 is driven and the control valve 6 is slowly opened. (Step S4). This valve opening is continued until the valve is opened as described later (step S5) or the valve is fully opened (step S6).

In FIG. 3 (B), the liquid level sensor S has splashes, bubbles,
When the liquid level is detected and the detection signal is input (step
S20), the valve opening / closing control means 21 sends a valve closing signal to the driving means 17, the stepping motor 16 is driven and the control valve 6 is closed (step S21). If the control valve 6 is closed before the valve is fully opened, that is, while the discharge amount is increasing (step S5), it is considered that the shape of the oil supply pipe is bad and the liquid level sensor S detects the splash, and the valve is immediately closed. A pulse for opening 6 is sent (step S8). This valve opening is less than the number of valve opening pulses immediately before the previous valve closing, and the valve 6 is opened until the valve opening degree, for example, 90% of the valve opening pulses (step S9), or the liquid is detected again and the valve is closed. Or (step S10) is continued. When a predetermined valve opening (opening of 90% of the number of pulses immediately before the last valve closing) is reached (step S9), refueling is performed with the discharge amount (refueling amount per unit time).

The relationship between the discharge amount Q and the time T for the above operation is shown in FIG. That is, in the case of step S6YES, 45 /
Refueling is performed at a rate of min. However, if the control valve 6 is closed at a point u on the way to 45 / min, for example, 40 / min (YES in step S5), 36 / min in step S9.
Is refueled at the ratio (point x). Further, for example, if the control valve 6 is closed at 30 / min (point v), 27 / min is refueled (point y), if 20 / min (point w), 18 / min is refueled (point z). Therefore, FIG. 4 and the conventional FIG. 6 and FIG.
By comparing with the figure, it can be seen that the waiting time decreases. Then, when the control valve 6 is closed by the output of the liquid level sensor S due to bubbles or splashes (step S11) or during the valve opening, that is, when the valve is closed in step S10, it is determined that both are almost full. After the bubble disappears, for example, 3 seconds (step S12), the same operation as the conventional one, that is, the discharge amount from point c to point d in FIG. 5 is controlled (step S13). Also, when the control valve 6 is fully opened and fuel is supplied at the maximum discharge amount (45 units / min) (step S6).
YES), when the control valve 6 is closed by the output of the liquid level sensor S due to bubbles or splashes (step S7), it is determined that the valve is almost full, and the control from step S12 onward is performed. In this way, except for the beginning of refueling, refueling was repeated several times in the same manner as in the past, until the tank was full and the nozzle valve was closed.
When the fueling nozzle 8 is hung on the nozzle hook 9, the nozzle switch 10 is turned off (step S14), the pump motor is stopped (step S15), and the operation is finished.

In the embodiment of the present invention, the discharge amount is changed by controlling the control valve, but the discharge amount may be changed by controlling the rotation speed of the pump drive motor. Further, instead of closing the control valve by the liquid detection signal of the liquid level sensor, it is also possible to implement a valve for closing the oil supply nozzle as described in JP-A-63-125196.

[Advantages of the Invention] As described above, according to the present invention, when refueling is started and the discharge amount is increased, for example, due to the shape of the refueling pipe, the liquid level sensor is splashed and refueling is stopped. In addition, because refueling is restarted immediately without a refueling stop time with a discharge amount that is a fixed amount smaller than the discharge amount immediately before the refueling stop,
When restarting, the liquid level sensor will not be splashed and refueling can be performed with a considerably large discharge amount without waiting time and the refueling time can be shortened to improve work efficiency.

Also, after refueling is started and the discharge amount increases and reaches the maximum discharge amount, refueling is stopped by the liquid detection signal from the liquid level sensor as before, and the discharge amount is reduced by a fixed amount after a certain period of time. Then, refueling is restarted, and this is repeated several times to fill up the tank, and the refueling is completed. Therefore, accurate refueling can be performed without overflow.

[Brief description of drawings]

FIG. 1 is an explanatory view of an oil supply device embodying the present invention, FIG. 2 is a block diagram showing an example of a control device embodying the present invention,
3 (A) and 3 (B) are views showing a flow chart of the present invention, FIG. 4 is an explanatory view of a flow pattern at the start of refueling, and FIG. 5 shows a conventional ideal flow pattern. FIG. 6, FIG. 6 and FIG. 7 are flow pattern diagrams showing the inconvenience of the conventional refueling start. 8 ... Refueling nozzle, 9 ... Nozzle hanging, 10 ... Nozzle switch, 11 ... Flow pulse generator, 12 ... Control device, 13
...... Display, 14 …… Pump motor, 16 …… Stepping motor, 20 …… Counting means, 21 …… Valve opening and closing control means, 22 ・ ・ ・
… Time keeping means, 23 …… Memory means

Continuation of front page (56) Reference JP-A-56-84296 (JP, A) JP-A-58-30998 (JP, A) JP-A-58-41095 (JP, A) JP-A-63-125196 (JP , A) JP-A-63-125197 (JP, A) JP-A-63-82998 (JP, A)

Claims (1)

(57) [Claims] 1. A refueling hose is connected to the tip of a pipe having a pump and a flow meter, a refueling nozzle provided with a liquid level sensor is attached to the tip of the refueling hose, and a nozzle switch is provided on the nozzle hook of the refueling nozzle. Refueling system, receiving the nozzle removal signal from the nozzle switch to start refueling, receiving the liquid detection signal from the liquid level sensor, the refueling stop means stops refueling, the discharge amount immediately before the refueling stop, and the storage means The refueling restart discharge amount is determined based on the relationship between the stored discharge amount when refueling is stopped and the discharge amount when refueling is restarted. A refueling control device that terminates refueling after stopping, wherein the refueling control device receives the nozzle removal signal from the nozzle switch, starts refueling while increasing the discharge amount, and If it is before the first stop of refueling reaches the maximum discharge rate, and if the first stop of refueling is before the maximum discharge rate, then the discharge rate is a fixed amount smaller than the discharge rate immediately before the stop of refueling. The refueling device is characterized in that a refueling control means for resuming refueling without adding a refueling stop time is added.