JPS6020639Y2 - Refueling device - Google Patents

Description

[Detailed description of the invention] This invention relates to an easy-to-operate refueling device with safety measures.

Recently, at gas stations, a so-called self-service system, in which customers refuel themselves, has been desired in order to reduce labor costs.

However, in this self-service system, inexperienced customers have to wait for the refueling nozzle and operate the nozzle.
Various safety measures and considerations are necessary.

This invention attempts to provide a refueling device equipped with a safety device that uses air.

That is, the refueling device of this invention includes a pressurized air generator that generates air having a predetermined pressure, an air supply path that supplies the pressurized air to the refueling nozzle, and a refueling device that is connected to the air supply path and that is connected to the refueling nozzle. an opening that opens to the atmosphere at the tip of the nozzle; and a movable member that is installed at the tip of the refueling nozzle and is operated by the refueling port to close the opening when the tip of the refueling nozzle is inserted into the refueling port. , a pneumatic converter that outputs a refueling ready electrical signal in response to a change in pressure in the air supply path when the opening is closed; and a flow path interposed in the oil flow path to the refueling nozzle. an on-off valve, a confirmation indicator for confirming the output of the refueling preparation completion electric signal from the pneumatic converter, and a signal for manually generating a command electric signal for opening the flow path on-off valve. It is characterized by consisting of a generating means.

The illustrated embodiment will be described below.

In FIG. 1, 1 is a housing for a refueling machine, which is usually installed on the ground at a refueling station.

Reference numeral 2 denotes an oil supply pump, which is rotationally driven by a motor 3 to suck up oil from an underground oil storage tank (not shown) through a pipe P and send it to the flow meter 5 .

The oil from the flow meter 5 is guided to the oil supply nozzle 12 at the tip of the oil supply hose 10 through an oil supply flow path in which a flow path opening/closing valve 11 is interposed.

The measured output of the flow meter 5 is inputted to a display 8 via a gear system 6, and the amount of oil supplied is displayed.

1H is a nozzle case, 9 is a nozzle switch, and when the refueling nozzle 12 is taken out from the nozzle case IH, the motor 3 is energized by a signal (nozzle signal) from the nozzle switch 9.

A compressor 4 is operated by the rotation of the motor 3, and air having a predetermined pressure is generated.

This pressurized air is guided to an air supply system indicated by a two-dot chain line in the figure.

That is, 14 is an air supply path that guides this pressurized air to the fuel supply nozzle 12.

This air supply path 14 is on the other hand also connected to a pneumatic converter 16 via a throttle valve 15 which controls the flow rate.

The pneumatic converter 16 is activated by changes in air pressure in the air supply system and outputs a refueling preparation completion electric signal A, and a specific example of its configuration is shown in FIG.

As shown in FIG. 2, the chamber 25 of the pneumatic converter 16 is divided into an upper chamber and a lower chamber by a diaphragm 26, and the upper chamber communicates with the air supply system connected to the compressor 4 via a pipe 31. has been done.

27 is connected to the lead wire 30 by two electrodes implanted in the lower chamber.

28 is a spring interposed in the lower chamber and the diaphragm 26
Always keep it in the illustrated state.

Reference numeral 32 is a small hole drilled in the upper chamber, which is constantly connected to the atmosphere so that the diaphragm 26 can quickly return to its original state when the air supply from the air supply system is cut off.

As described later, when the air supply system becomes high pressure, diaphragm 2
6 is displaced downward against the elasticity of the spring 28, and the conductor 2
9 is connected to both electrodes 27, and an electrical signal is output from the lead wire 30.

The structure of the refueling nozzle 12, particularly the structure of the nozzle tip N, is as shown in FIG.

A nozzle tip N is provided at the tip of the refueling nozzle 12 to be inserted into the refueling port 38 (Fig. 4).
An air tube 33 for checking insertion as an extension of 4 is provided inside.

That is, the insertion confirmation air tube 33 is communicated with the air supply path 14, and its tip is opened at a predetermined position of the nozzle tip N.

33' is its opening. There is a movable frame 1 on the nozzle tip N.
3 is attached to the ring, and is normally biased toward the tip of the cylinder by the elasticity of a spring 34.

36 is a stopper that regulates it.

As shown in FIG. 3, when the movable frame 13 is biased by the spring 34 and in a position where it contacts the stopper 36, the opening 33' of the tube 33 is opened to the atmosphere by the discharge port 33 formed in the movable frame 13. It is open to

Therefore, the pressurized air from the air supply path 14 is transferred to this opening 33.
It is discharged from '.

When the refueling nozzle 12 is inserted into the refueling port 38, the movable frame 13 contacts (presses) the refueling port 38 as shown in FIG. ' is closed by the movable frame 13.

Due to this closure, the pressure within the air supply path 14 increases and the air supply system becomes under high pressure.

This pressure change activates the pneumatic converter 16 and outputs the refueling preparation completion electric signal A.

As shown in FIG. 1, the electrical signal A is transmitted to the operation unit 20 in the control room and lights up the confirmation indicator (lamp) 22.

The administrator or office worker presses the permission switch 23 after confirming safety by this lighting.

By this operation, a command electric signal B is output, the pilot valve 17 is actuated, and the hydraulic pressure from the bypass flow path 18 operates the flow path opening/closing valve 11 to open the flow path.

Therefore, by opening this flow path, oil can be supplied from the oil supply nozzle 12 to the oil supply port 38.

FIG. 5 shows the control electrical circuit of the device of the present invention.

The symbols of each element in FIG. 5 correspond to the symbols in FIGS. 1 and 2.

When the nozzle 12 is removed from the nozzle case IH, the electromagnetic contactor MO with the nozzle switch 9 closed is energized and its contact MC is activated.
' is closed, the motor 3 is energized, and the pump 2 and compressor 4 are operated.

When the nozzle tip N is inserted into the refueling port, the pneumatic converter 16 is activated as described above, and the conductor 29 connects both electrodes 27, so the confirmation lamp 22 lights up and the relay R1 is activated.
is energized and contact R1' closes.

When the refueling permission switch 23 is pressed, the emergency stop switch 24 is normally closed, so the relay R2 is energized and the permission lamp 23' lights up.

The lamp 23' can also be built into the push button of the switch 23.

The energization of relay R2 closes its contacts R2', R2''.

When R2' is closed, the self-holding circuit is closed, and when R2'' is closed, the pilot valve 17 is operated and the bypass flow path 1 is closed.
Open 8.

Therefore, as described above, the oil pressure from the bypass passage 18 causes the passage opening/closing valve 11 to open the oil passage, making it possible to supply oil by operating the nozzle 12.

If the manager senses danger during refueling, he or she can press the emergency stop switch 24 to deenergize relay R2 and close contact R.
2'' is opened, the pilot valve 17 is closed, and the channel opening/closing valve 11 is closed, thereby stopping the refueling.

When the nozzle tip N is pulled out from the refueling port 38 during refueling, the movable frame 35 returns to the state shown in FIG. The diaphragm 26 of the transducer 16 is returned upwardly, the conductor 29 is separated from the electrode 30, the relay R1 is deenergized, and therefore the relay R2 is also deenergized, so that the pilot valve 17 is closed and therefore the on-off valve 11 is closed. Refueling is stopped.

After refueling, when the nozzle 2 is returned to the case IH, the nozzle switch 9 is opened and the motor 3 is deenergized.

As shown in FIG. 1, when a preset device is provided, the flow path opening/closing valve 11 can be configured to close the flow path when the preset amount of oil supply is completed.

Reference numeral 7 denotes a transmitter necessary for this preset refueling.

FIG. 6 is a flowchart of the refueling operation. The present invention is not limited to the illustrated embodiment.A compressor is suitable as a device for generating pressurized air, but the present invention is not limited thereto.

The configuration of the pneumatic converter 16 is not limited to the configuration shown in FIG. 2, and the opening/closing mechanism for the air supply passage opening at the refueling nozzle, particularly at the tip of the nozzle, may have various configurations other than the illustrated example.

The same can be said about the structure of the operating section.

As detailed above, this device is configured so that refueling is only possible after a manager who is different from the nozzle operator confirms that the tip of the refueling nozzle has been inserted into the refueling port. This ensures that even when an unfamiliar customer performs refueling work, it can be done safely, reliably, and easily.

In particular, since air is used, there are no electrical contacts near the tip of the refueling nozzle, where dangerous substances such as gasoline are discharged, which could generate sparks in the event of an accident, and there is also the risk of oil being discharged even if the air hose is damaged. The effect is remarkable, with no cases at all.

[Brief explanation of the drawing]

Figure 1 is a diagram schematically showing the entire device of this invention, Figure 2 is a diagram showing the configuration of the pneumatic converter, Figure 3 is a diagram showing the nozzle tip of the refueling nozzle, and Figure 4 is an explanation of the operation. 5 is an electric circuit diagram, and FIG. 6 is a flowchart of refueling work. 1...Refueling machine housing, 2...Refueling pump, 3...Motor, 4...Compressor, 5...Flowmeter, 9...Nozzle switch, 10...Refueling hose, 11...
...Flow path opening/closing valve, 12...Refueling nozzle, 13
......Movable frame, 14...Air supply path, 16.
... Air converter, 17 ... Pilot valve, 20 ... Operation section, 22 ... Confirmation lamp, 23 ... Permission switch, 24...
Stop switch, 26...Diaphragm, 28.
34...Spring, 29...Conductor,
30...Lead wire, 33...Air tube, 35...Discharge port, 36...Stopper 38...Refueling port.

Claims (2)

[Scope of utility model registration request] (1) A pressurized air generator that generates air having a predetermined pressure, and an air supply path that supplies this pressurized air to a refueling nozzle;
An opening that communicates with the air supply path and opens to the atmosphere at the tip of the refueling nozzle, and an opening that is installed at the tip of the refueling nozzle and is operated by the refueling port when the tip of the refueling nozzle is inserted into the refueling port. a movable member that closes the opening; a pneumatic converter that outputs an electrical signal indicating that refueling is ready in response to a change in pressure in the air supply path when the opening is closed; A flow path opening/closing valve interposed in the flow path, a confirmation indicator for confirming the output of the refueling preparation completion electrical signal from the pneumatic converter, and a command for opening the flow path opening/closing valve. A refueling device comprising a signal generating means for manually generating an electric signal. (2) The refueling device according to claim 1, wherein the confirmation display and the signal generating means are provided in a console separate from the device housing.