JPS6350279B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a refueling device.

Currently, there are two types of refueling devices: (1) those that have a function (preset function) that allows the customer to preset the amount of refueling specified by the customer (preset) and automatically stop refueling when the set amount of refueling is reached; A device that has a function that can automatically stop refueling accurately at a whole amount of refueling by performing a refueling stop notice operation near the refueling amount (exact stop function), and has both functions (1) and (2) above. Some are known to have both.

With such a lubrication device, there are cases where it is desired to perform additional lubrication after refueling at a preset amount or the exact stop amount, but with conventional devices, the lubrication nozzle must be returned to the nozzle case for additional lubrication, which is inconvenient. Not only this, but it is also inconvenient because returning the nozzle causes the refueling amount counter to return to zero.

By the way, in general, in a refueling system, the control of the refueling flow rate (including control of the start and stop of refueling; hereinafter referred to as flow rate control) is based on the opening/closing and opening degree of the built-in valve of the refueling nozzle or the energization of the motor of the refueling pump. , by controlling de-energization and rotational speed.

The present invention provides a refueling device equipped with automatic refueling stop means using one or both of the above functions and a flow rate control means that controls the flow rate as described above.
After the refueling is stopped by the automatic refueling stop means, the refueling stop state by the automatic refueling stop means is canceled on the condition that the flow rate control means returns to the refueling disabled state.

That is, the first invention comprises: (a) a refueling nozzle having an operating lever; (b) an oil feeding means including a pump provided in an oil feeding path to the oil feeding nozzle, a pump drive motor, and a pump drive motor control circuit; c. A preset lubrication means that gives a lubrication stop signal to the pump drive motor control circuit to stop the pump drive motor when the lubrication value reaches a preset value, or a lubrication stop signal when the lubrication value reaches a value without a fraction. a stop means for stopping the pump drive motor by giving a signal to the drive motor control circuit; and providing the pump drive motor control signal to the pump drive motor control circuit to control the oil supply flow rate, e. When a motor control signal corresponding to the pump drive motor stop position of the lever is given from the element after the oil supply stop signal is given from the oil supply means or the stop means, the pump drive motor control circuit The system is configured to recover from a state where no refueling stop signal is given.

Further, the second invention provides: a) a refueling nozzle having an operating lever; b) an oil feeding means including a pump and a pump drive motor provided in an oil feeding path to the oil feeding nozzle; and b′ opening and closing of the oil feeding path. (c) a preset oil supply means that applies a valve closing signal to the control valve control circuit to close the control valve when the oil supply value reaches a preset value; or, in a refueling apparatus comprising: a stop means for applying a valve closing signal to the control valve control circuit to close the control valve when the refueling value reaches a value without a fraction; d. to the refueling nozzle; An element that generates a control valve control signal that changes depending on the operating position of the operating lever is disposed in association with the element, and the control valve control signal is applied to the control valve control circuit to control opening/closing and opening degree of the control valve. and e) controlling the control valve control circuit from the element to control the valve in response to the valve closing position of the lever after the valve closing signal is applied to the control valve control circuit from the preset oil supply means or the stop means. When the valve control signal is applied, the control valve control circuit is configured to restore the state in which the valve closing signal is not applied.

Furthermore, the third invention includes: a) a refueling nozzle having a built-in valve and an operating lever that mechanically opens and closes the built-in valve; and b, a pump and a pump drive motor provided in an oil feed path to the refueling nozzle. an oil supply means; b' a flow rate control means including a large flow valve that opens and closes the oil supply passage; a small flow valve provided in a bypass passage of the large flow valve; and a control circuit for both of the flow rate valves; When the refueling value reaches a value slightly before the preset value and when the refueling value reaches the preset value, a closing signal for the large flow valve and the small flow valve is applied to the flow valve control circuit to close the large flow valve and the small flow valve, respectively. A preset lubrication means for closing the flow valves, or a closing signal for the large flow valve and small flow valve when the lubrication value reaches a value slightly before the rounded value and when it reaches the rounded value, respectively. a stop means applied to the flow valve control circuit to close the large flow valve and the small flow valve, respectively; a switch is provided to detect the flow rate valve control circuit, and after the flow rate control circuit is given a closing signal for the large flow valve and the small flow valve, the switch causes the control lever to close the refueling nozzle built-in valve. When a signal corresponding to the position is applied, the flow valve control circuit is configured to restore the state in which the closing signal is not applied.

The illustrated embodiment will be described in detail below.

In Fig. 1a, 1 is the housing of the refueling device, which is installed on the ground surface G of the gas station, 2 is the oil pipe that leads oil from an underground oil storage tank (not shown) to the refueling hose 3, and 4 is the tip of the hose 3. This is a refueling nozzle, and only a check valve (not shown) is built into the nozzle, and no flow control valve is built in.

Reference numeral 5 denotes a variable resistor provided on the lever guard 6 of the nozzle 4, which constitutes one element of a control circuit to be described later, and whose resistance value changes depending on the operating position (pull degree) of the operating lever 7.

The resistance value of this resistor 5 is a value that stops the pump motor when the lever 7 is not pulled (motor stop resistance value), and the rotation speed of the pump motor is increased or decreased depending on the degree to which the lever 7 is pulled. Selected.

8 is a pump inserted into the oil feed pipe 2, 9 is a pump 8
10 is a flow meter inserted into the oil feed pipe 2, 11 is a flow pulse transmitter that generates a pulse corresponding to the measured value (oil amount) of the flow meter 10, 12 is a control unit, and 13 is an oil amount 14 is a preset keyboard for presetting (presetting) the desired oil supply amount; 15 is a nozzle hook in which the nozzle 4 is stored; 16 is a nozzle switch installed in the nozzle hook 15 to remove the nozzle from the nozzle case. When the nozzle is operated, the nozzle signal rises, and when the nozzle is returned to the nozzle case, the nozzle signal falls.

Operate the preset keyboard 14 to enter the desired refueling amount (e.g. 20) or refueling amount (e.g. 3000).
When the fuel amount preset circuit 17A or the fuel amount preset circuit 17B supplies a signal _A1 or _B1 corresponding to the preset amount or amount to the comparator circuit 18A or 18B (FIG. 3a).

Note that the preset circuits 17A and 17B are reset by the fall of the nozzle signal when the nozzle was previously returned to the nozzle case.

The rise of the nozzle signal when the nozzle is removed from the nozzle case this time resets the flow rate pulse counting circuit 19A, the refueling amount pulse counting circuit 19B, and the arithmetic circuit 20, which will be described later, and also controls the pump motor 9 via the motor control circuit 21. Enables energization. Then, when the lever of the nozzle is pulled, the motor 9 is energized, and the motor rotates at a rotational speed corresponding to the extent to which the lever is pulled, and refueling is started. As refueling progresses, flow rate pulses from the flow rate pulse transmitter 11 are counted by the counting circuit 19A, and the count output (refueling amount)
is displayed on the display 13A, and is also input to the comparison circuit 18A and compared with the preset value stored therein. When the two become equal, a refueling stop signal (one pulse) _A2 is sent to the motor control circuit 2.
1 to stop the motor 9. Note that the flow rate can be changed by changing the degree to which the lever 7 is pulled during refueling (by changing the rotational speed of the motor).

The flow rate pulse is also given to an arithmetic circuit 20, and this arithmetic circuit 20 is connected to a unit price setting circuit 2 by a unit price setting device 22.
Calculation is performed using the refueling unit price (for example, 150 yen/liter) set in No. 3 and the flow rate pulse, and a refueling amount pulse is given to the counting circuit 19B. Note that the unit price is displayed on the display 13C.

The output (refueling amount) of the counting circuit 19B is given to the comparator circuit 18B, and if the refueling amount is preset, it is compared with the preset refueling amount from the preset circuit 17B, and when the two become equal, a refueling stop signal (one Pulse) _B2 is applied to the motor control circuit 21 to stop the motor 9.

In the above-mentioned preset lubrication, the stop operation is not normally performed, but even in the preset lubrication, the tank may become "full" before the amount of oil supplied reaches the preset value. In this case, there is usually some margin even when the tank is called "full," so it is desirable to refuel the tank until it reaches a fractional value (that is, to stop the tank just in time). To this end, the flow velocity is changed by rapidly moving the lever 7 repeatedly several times to change the rotational speed of the motor 9 as a warning operation of the stop. Since the period of the flow rate pulse changes when the flow velocity changes, the detection circuit 24 detects this change and provides an output to the control circuit 25. Control circuit 2
5 is given signals from the counting circuits 19A, 19B and preset circuits 17A, 17B, so when the refueling amount or refueling amount is preset, the detection circuit 2 is applied depending on which one is preset.
After inputting the signal from 4, the control circuit 25 gives a refueling stop signal (one pulse) C to the motor control circuit 21 with a value without fractions of the refueling amount or the amount of money.
(just) stop. In other words, if the refueling amount is preset, the stop will be performed exactly at the refueling amount, and
If the refueling amount is preset, the stop will be made exactly at the refueling amount.

Note that even if the refueling amount (or amount) is preset, it may be configured to stop exactly at the refueling amount (or amount).

In the case of just stopping without presetting, the just stopping control circuit 25 is operated by signals from the counting circuit 19A and the detection circuit 24. In this case, the stop circuit 25 is exactly the same as the counting circuit 19B.
It can also be configured to be operated by the signal from the detection circuit 24, and the counting circuit 1
It is also possible to select a signal from 9A or 19B and to operate the stop control circuit 25 according to that signal and the signal from the detection circuit 24.

As described above, when the refueling is stopped by the preset function or the just stop function, when the lever 7 is returned to the motor stop resistance value position, the resistor 5
The motor control circuit 21 enables the motor 9 to be energized again by the signal D from the motor. In other words, the motor control circuit outputs the refueling stop signal A ₂ or B ₂ or C
Recovers the state where is not given. At this time, since the nozzle has not been returned to the nozzle case, there is no reset signal from the nozzle switch 16, and therefore the counting circuits 19A, 19B (indicators 13A, 13
B) The arithmetic circuit 20 is not reset. If the lever is then pulled again, the motor 9 is energized and refueling can be resumed.

FIG. 1b shows an example in which the flow rate is controlled by a continuous flow rate control valve 36, such as a motor-driven valve, inserted into the oil pipe 2.

Figure 3b shows the control circuit of Figure 1b. In these figures, the same reference symbols as in FIGS. 1a and 3a indicate corresponding parts or elements, and only differences in construction and operation will be explained.

In FIG. 3b, a valve control circuit (control valve control circuit) 21' for controlling opening/closing and opening degree of the valve 36 is provided in place of the motor control circuit 21 in FIG. 3a. The motor 9 is energized at the rising edge of the nozzle signal from the nozzle switch 16, and deenergized at the falling edge of the nozzle signal.

The resistance value of the resistor 5 is selected so that the valve 36 is closed when the lever 7 is not pulled, and the degree of opening of the valve 36 is increased or decreased depending on the degree to which the lever is pulled.

The preset function or just stop function allows the third
Lubrication stops automatically (valve 36) in the same way as in figure a.
(closed), when the pulled lever is returned, the refueling stop state is canceled in the valve control circuit 21'.
The valve 36 can be opened by pulling the lever again.

FIG. 2 shows an example in which the nozzle 4 has a built-in valve (not shown) and the flow rate is controlled by controlling the opening and closing of the valve with the operating lever 7. In this example, the position of the lever 7 is detected using a magnet 37 provided at the end of the lever 7.
This is performed by a reed switch 38 attached to the lever guard 6 so as to be opened and closed by the magnet 37. Further, in this example, a large flow valve 39 is provided in the oil feed pipe 2 of the refueling machine, and a small flow valve 40 is provided in the bypass passage 2' attached astride this large flow valve. By selectively controlling the opening and closing, the large flow rate of lubrication is switched to a small flow rate just before reaching the preset lubrication amount or exactly the stop amount, thereby accurately stopping the lubrication at the preset amount or exactly the stop amount. be.

FIG. 4 shows a control circuit for the example of FIG. In FIG. 4, the same reference numerals as in FIG. 3b indicate corresponding elements. Valve control circuit (flow rate valve control circuit) 21″
switches between a large flow rate and a small flow rate as described above, and also closes both valves 38 and 40 when the preset is stopped or just stopped, but when the pulled lever 7 is returned, the oil supply is stopped in the circuit 21''. is released, thereby opening the valves 39 and 40, and refueling can be performed by pulling the lever again.

FIG. 5 is a flowchart showing the procedure of refueling operation by the apparatus of the present invention. In this flowchart, the preset operation is performed after removing the nozzle from the nozzle case, but it can also be performed before removing the nozzle from the nozzle case.

In FIG. 2, the return of the lever is detected by a reed switch, but the detection means does not necessarily need to be provided in conjunction with the lever, and may be provided in the operating mechanism of the valve with a built-in nozzle.

Furthermore, the apparatus of the present invention can be configured to supply oil at a small flow rate for a certain period of time immediately after the start of oil supply.

As described above, according to the present invention, even if refueling is stopped, refueling can be resumed at any time by returning the lever or operating member to its original position (non-operating position), so it is possible to restart refueling at any time by returning the nozzle to the nozzle case. There is no need to attach special means, and additional refueling operation becomes easy.

[Brief explanation of drawings]

Figures 1a, 1b, and 2 are schematic configuration diagrams of different embodiments of the present invention, Figures 3a and 3b are block diagrams of the control circuits of Figures 1a and 1b, respectively, and Figure 4 is a block diagram of the control circuit of Figures 1a and 1b, respectively. FIG. 2 is a block diagram of the control circuit, and FIG. 5 is a flowchart showing the operating procedure of the apparatus. 2...Oil pipe, 3...Hose, 5...Variable resistor, 7
...Operation lever, 8...Pump, 10...Flowmeter, 11
...Flow rate pulse transmitter, 13...Display device, 14...Keyboard, 15...Nozzle case, 16...Nozzle switch.

Claims (1)

[Scope of Claims] 1 a. A refueling nozzle having an operating lever, b. An oil feeding means including a pump provided in an oil feeding path to the refueling nozzle, a pump drive motor, and a pump drive motor control circuit, c. A preset lubrication means for supplying a lubrication stop signal to the pump drive motor control circuit to stop the pump drive motor when the lubrication value reaches a preset value, or a lubrication stop signal for supplying a lubrication stop signal when the lubrication value reaches a value without a fraction. a stop means that is applied to the drive motor control circuit to stop the pump drive motor; d. A pump drive motor control signal that changes depending on the operating position of the operating lever is applied to the fuel nozzle; and providing the pump drive motor control signal to the pump drive motor control circuit to control the oil supply flow rate, e. When a pump drive motor control signal corresponding to the pump drive motor stop position of the lever is given from the element after the refueling stop signal is given from the means or just the stop means, the pump drive motor control circuit A refueling device characterized in that the refueling device is configured to recover from a state in which the refueling stop signal is not applied. 2 a: a refueling nozzle having an operating lever; b: an oil supply means including a pump and a pump drive motor provided in an oil supply path to the oil supply nozzle; and b': a control valve for opening and closing the oil supply path, and this control valve. c. a preset oil supply means that applies a valve closing signal to the control valve control circuit to close the control valve when the oil supply value reaches a preset value, or a preset oil supply means that closes the control valve when the oil supply value reaches a preset value; a stop means for applying a valve closing signal to the control valve control circuit to close the control valve when a value of 0 is reached; an element that generates a control valve control signal that changes in accordance with the control valve is provided, and the control valve control signal is applied to the control valve control circuit to control the opening/closing and opening degree of the control valve, and e. The control circuit is configured such that after the valve closing signal is applied from the preset oil supply stopping means or the just stopping means to the control valve control circuit, a control valve control signal corresponding to the valve closing position of the lever is applied from the element. 2. A refueling system according to claim 1, wherein the control valve control circuit is configured to restore the state in which the valve closing signal is not applied when the valve close signal is not applied. 3 a. A refueling nozzle having a built-in valve and an operating lever that mechanically opens and closes the built-in valve; b. a flow control means including a large flow valve that opens and closes the oil feed path, a small flow valve provided in a bypass path of the large flow valve, and a control circuit for both flow valves, c. Preset lubrication for supplying closing signals for the large flow valve and the small flow valve to the flow valve control circuit to close the large flow valve and the small flow valve, respectively, when the previous value is reached and when the preset value is reached. means, or when the oil supply value reaches a value slightly before the unrounded value and when the refueling value reaches the unrounded value, respectively, provides a closing signal for the large flow valve and the small flow valve to the flow valve control circuit. a stop means for closing the large flow valve and the small flow valve, respectively; d. the refueling nozzle is provided with a switch for detecting a closing position of the valve built in the refueling nozzle by the operating lever; e After the flow valve control circuit is given a closing signal for the large flow valve and the small flow valve, a signal corresponding to the closing position of the refueling nozzle built-in valve of the operating lever is sent from the switch. A refueling device characterized in that the flow valve control circuit is configured to restore the state in which the closing signal is not applied when the closing signal is applied.