JP2000335700A - Oil supplying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely recover vapor generated during oil supply. SOLUTION: This oil supplying apparatus is provided with a vapor sensor 14 provided in vapor recovering paths 7, 12 and 15 from a vapor recovering cover 10 and a controlling means 16 which stops supplying a fuel oil to an oil supplying nozzle 8 or actuates an alarming means when concn. of the vapor sensor 14 is less than the reference value. In addition, when a vapor recovering means is in a bad condition or an oil supplying nozzle is not regularly set in an oil supplying hole or the nozzle is disconnected from the oil supplying hole, as the detected vapor concn. is less than the reference value, an alarm is raised or supplying oil is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling device having a function of collecting vapor leaking from a refueling port of a tank.

[0002]

2. Description of the Related Art For example, when a highly volatile fuel oil such as gasoline is supplied to a fuel tank of an automobile, air containing vapor corresponding to at least the supplied amount is released to the environment.
In order to prevent such diffusion of vapor into the atmosphere, a vapor recovery cover is provided on the refueling nozzle as shown in JP-A-4-311498, and the suction force of the vapor recovery pump is actuated by a hose during refueling. There has been proposed an oil supply device for sucking vapor generated in the air.

[0003]

However, when the vapor recovery pump is malfunctioning or when the fueling nozzle is not set in the fuel tank in a prescribed state, refueling is performed with the vapor leaking to the atmosphere. Problem. The present invention has been made in view of such a problem, and a purpose thereof is to monitor a recovery state of vapor, and to stop refueling when vapor recovery is impossible. It is to provide a refueling device.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a vapor collecting cover provided at a cylinder tip, a fuel supply nozzle for receiving a supply of fuel oil from a fuel pump, and a vapor collecting cover. In a refueling device having a vapor collecting means for suctioning and collecting vapor generated during refueling by connecting with a hose, detecting a concentration of the vapor provided in a flow path connecting the vapor collecting means from the vapor collecting cover. And a control means for stopping the supply of fuel oil to the refueling nozzle when the concentration detected by the vapor sensor is lower than a reference value or for activating an alarm means.

[0005]

[Action] If the vapor collection means is malfunctioning, the refueling nozzle is not set to the refueling port as specified, or if the nozzle comes off the refueling port, the detected vapor concentration will decrease, so an alarm is issued. It also prevents the release of vapor into the atmosphere by emitting or stopping the liquid supply, and also prevents the occurrence of a serious accident due to the detachment of the nozzle.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; FIG. 1 shows an embodiment of an oil supply device of the present invention. An oil supply pump 2 driven by a pump motor 1 has a suction port connected to an oil storage tank 4 via a rising pipe 3 and a discharge port. Is connected to the inflow port of the flowmeter 5, further connected to the outflow port of the flowmeter 5, and connected to a refueling nozzle 8 via a pipe 6 and a refueling hose 7.

The refueling nozzle 8 has a vapor recovery cover 10 provided at the rear end of the cylinder tip 9, and a vapor recovery hose 11 attached to the refueling hose 7 and a vapor return pipe 1.
2 is connected to a vapor recovery pump 13.
In the middle of the pipe 12, a vapor sensor 14 is connected,
A vapor collection pipe 15 communicating with the underground tank 4 is connected to the discharge port. The vapor sensor 14 is configured by housing a gas sensor sensitive to an organic solvent in a chamber connected to a flow path.

The control means 16 includes a pump driving means 30 for operating the pump motor 1 and the vapor recovery pump motor 19 in response to a signal from a nozzle switch 18 provided near the nozzle hook 17 as shown in FIG. When the nozzle switch 18 is switched from off to on, the counting means 31 is reset and counts the pulses from the pulse transmitter 20 of the flow meter 5; Display driving means 3 for outputting to 21
2, a signal from the vapor sensor 14 and first and second reference values previously stored in the storage unit 33, for example, 30
It is composed of a pump driving means 30 and a comparing means 35 for outputting a signal to the annunciator driving means 34 in comparison with vol% and 20 vol%. Reference numeral 22 in the figure denotes an acoustic or optical alarm unit.

Next, the operation of the apparatus having the above-described structure will be described with reference to FIG.
A description will be given based on the flowchart shown in FIG. The refueling nozzle 8 is removed from the nozzle holder 17 and the nozzle switch 18
Is turned on (step b), the control means 16
Returns the indicator 21 to zero and the pump motor 1,
19 is driven (step b). When the fuel supply nozzle 8 is inserted and the fuel supply lever is pulled up so as to cover the fuel supply port of the vehicle fuel tank with the vapor recovery cover 10, the fuel oil from the fuel supply pump 2 flows into the tank, and the pulse signal from the flow rate pulse transmitter 20 is output. Output (Step c). The counting means 31 integrates the flow rate pulses and displays the display driving means 3
2 and the refueling amount is displayed on the display 21 (step d).

When refueling is started in this manner, vapor corresponding to the refueling amount flows from the vehicle fuel tank to the refueling port. However, the vapor is sucked by the negative pressure acting on the cover 10 covering the refueling port, so that the vapor is removed from the atmosphere. To prevent leakage.
The vapor recovered from the refueling nozzle 8 flows into the vapor sensor 14 via the vapor return pipe 12, and is recovered via the vapor recovery pipe 15 to vapor recovery means, in this embodiment, the oil storage tank 4.

The comparing means 35 compares the concentration of the vapor detected by the vapor sensor 14 with the first and second reference values stored in the storage means 33. If the refueling nozzle 8 is set at the refueling port as specified and the vapor is reliably collected, a vapor having a high concentration, for example, 30 vol% or more vapor, flows into the vapor return pipe 12, Exceeding the first reference value (Step E). Thereby, the control means 15 continues to operate each of the pumps 1 and 19 until the nozzle switch 18 is turned off (step F).

On the other hand, when the refueling nozzle 8 is displaced from the refueling port and the like, a part of the vapor leaks to the atmosphere and the recovered vapor concentration is slightly lower, for example, 20 to 30 vol%.
In this case, the signal from the vapor sensor 14 falls below the first reference value and exceeds the second reference value (step).
To output the signal to operate the alarm 22 (step
D) Call attention to the operator.

Thus, the vapor can be reliably recovered by resetting the refueling nozzle 8. When the vapor concentration rises above the first reference value (step nu), the control means 15 stops the operation of the notification means 22 (step), and turns off the nozzle switch 18 (step f). The pumps 1 and 19 are continuously operated.

On the other hand, when the fuel supply nozzle 8 largely deviates from the fuel supply port of the vehicle fuel tank, or when the vapor is hardly recovered due to the failure of the vapor recovery pump 13 or the like, the signal from the vapor sensor 14 outputs the second signal. Since the value is below the reference value (step h), the comparing means 35 outputs a signal to the pump driving means 30 to stop the pump motor 1 (step e), issues an alarm from the alarm means 22 if necessary, Wait until is turned off (step w).

In the above-described embodiment, the vapor sensor 14 is connected to the suction port side of the vapor recovery pump 13, but is connected to the discharge port side of the vapor recovery pump 13, or as shown in FIG. As described above, even when the gas sensor 40 constituting the vapor sensor 14 is arranged in the area covered by the vapor collection cover 10, the same effect is exerted.

Further, as shown in FIG.
In the refueling apparatus in which two refueling nozzles 8 and 8 ′ can be selected via electromagnetic valves 41 and 42, respectively, the vapor collecting covers 10, 1
0 ', and these are collected as vapor recovery hoses 11 and 11'.
Are connected to the stop valves 43 and 44 via a vapor return pump 13 via the vapor return pipe 12 to the respective stop valves 43 and 44.
When the vapor concentration falls below the second reference value, the open valve, for example, the valve 43, for example, may be closed to stop the supply of the fuel oil to the nozzle 10. Obviously, it has a similar effect.

[0017]

As described above, according to the present invention, the vapor sensor provided in the vapor recovery flow path from the vapor recovery cover and the fuel supply nozzle when the concentration detected by the vapor sensor is lower than the reference value. Since the control means to stop the supply of fuel oil to the or to activate the alarm means, the vapor recovery means is malfunctioning,
Or, if the refueling nozzle is not set as specified in the refueling port, or if the nozzle comes off from the refueling port, an alarm can be issued or the liquid supply can be stopped to prevent the release of vapor to the atmosphere. Serious accidents can be prevented from occurring.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a fuel supply device of the present invention.

FIG. 2 is a block diagram showing one embodiment of a control unit of the above device.

FIG. 3 is a flowchart showing an operation of the above device.

FIG. 4 is a diagram showing an embodiment of a fueling nozzle usable in the above-mentioned device.

FIG. 5 is a configuration diagram showing another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pump motor 2 refueling pump 5 flow meter 7 refueling hose 8 refueling nozzle 10 vapor recovery cover 13 vapor recovery pump 14 vapor sensor 16 control means 18 nozzle switch

Claims (2)

[Claims] A vapor collection cover provided at a tube tip, a fuel supply nozzle for receiving a supply of fuel oil from a fuel supply pump, and a vapor recovery means connected to the vapor recovery cover by a hose for suctioning and recovering vapor generated during refueling. And a vapor sensor for detecting the concentration of the vapor provided in a flow path connecting the vapor collection cover to the vapor collection means, and a concentration detected by the vapor sensor being lower than a reference value. In such a case, the fuel supply device includes control means for stopping supply of fuel oil to the fuel supply nozzle or activating alarm means. 2. The method according to claim 1, wherein at least two concentrations of a high concentration reference value and a low concentration reference value are set as the reference values, and the vapor concentration detected by the vapor sensor is:
The fuel supply device according to claim 1, wherein the alarm device is activated when the concentration falls within the range between the high concentration reference value and the low concentration reference value, and the supply of the fuel oil is stopped when the concentration falls below the low concentration reference value. .