JPH0769398A - Oil feeder - Google Patents

Abstract

PURPOSE:To prevent a wrong oil feeding, by a method wherein when an oil feeding nozzle is inserted into an oil feeding port of a fuel tank, an oil kind detecting sensor provided on the oil feeding nozzle detects an oil kind from vapor concentration in the fuel tank, and if it is determined that the oil kind is wrong, an alarm is given to an operator. CONSTITUTION:If an oil feeding nozzle 9 is taken off from a nozzle hanger 10, a nozzle switch 11 is turned ON to drive a suction pump 15 in a reversed direction for a prescribed time, so that oily vapor in a suction hose 13 is exhausted into the atmosphere. Next, if a discharge pipe 9a of the oil feeding nozzle 9 is inserted into an oil feeding port of a fuel tank, an insertion sensor 16 detects it and drives the suction pump 15 in a normal direction for a prescribed time, so that vapor in the fuel tank may be sucked through a gas collecting cylinder 14 and the suction hose 13. As a result, the oil kind detecting sensor 12 is exposed to the sucked oily vapor, resistance value of a resistor varies, and output voltage also varies. By this voltage variation, a controller 17 detects the oil kind, determines whether the detected oil kind is the same as the oil kind to be fed by the oil feeding nozzle 9. If it is not the same, an alarm 23 is given.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device used in a gas filling station, and more particularly to an oil supply device suitable for use in the case of preventing an oil of a wrong liquid type from being supplied to a fuel tank of a vehicle or the like.

[0002]

2. Description of the Related Art Generally, a refueling device used in a refueling station is designed so that a refueling pump is automatically driven when a refueling worker removes a refueling nozzle attached to the refueling device. It is possible to refuel by inserting the refueling nozzle into the refueling port of the vehicle. In this case, the type of liquid that can be refueled is limited to the oil in the underground tank pumped up by the refueling pump of the refueling device, and in order to refuel the oil required by the vehicle, It is necessary to use a refueling nozzle for oils pumped from an underground tank of the same liquid type.

By the way, an erroneous oil supply prevention device is known as a device for preventing troubles such as a refueling worker accidentally refueling a vehicle equipped with a gasoline engine with light oil or a vehicle equipped with a diesel engine with gasoline. ing. An "oil supply device" (Japanese Utility Model Laid-Open No. 60-70595) has been previously proposed as a device provided with this type of device in an oil supply device. When the refueling nozzle is inserted into the vehicle's refueling port, the photo sensor provided at the tip of the nozzle is immersed in the oil in the fuel tank, and the type of oil is determined by the degree of light absorption by the photo sensor. To do.

[0004]

However, the above-mentioned conventional "fueling device" has the following problems.

Since the fuel tank of a vehicle or the like has a complicated pipe shape from the fuel filling port to the tank body, the photo sensor may not reach the liquid surface of the oil, and therefore the liquid type of the oil may be discriminated. There were times when I couldn't.

Even if the photosensor is dipped in oil, the sensitivity of the sensor may be reduced due to the dirt of the oil or the accompanying dirt of the sensor, and the liquid type of the oil may be erroneously detected.

The present invention has been proposed in view of the above-mentioned problems, and in order to prevent refueling of oil of an incorrect liquid type to a fuel tank of a vehicle or the like, prior to refueling, the oil concentration is changed from the vapor concentration in the fuel tank. It is an object of the present invention to provide a refueling device capable of surely detecting the oil supply and notifying the user when an erroneous fuel supply is detected.

[0008]

In order to solve the above-mentioned problems, an oil supply device according to the present invention includes a pipe having one end connected to a tank, a pump provided in the middle of the pipe and driven by a pump motor, and an oil supply amount. And a fueling nozzle that is provided on the other end side of the pipe via a hose and discharges oils sent from the pump to a fuel tank.

The features of the configuration adopted by the present invention are as follows:
An oil type detection sensor for detecting an oil type from the vapor concentration of the fuel tank, a comparison means for comparing the oil type detected by the oil type detection sensor with the oil type supplied from the refueling nozzle, and detected by the comparison means. It is composed of an alarm means for issuing an alarm when it is determined that the oil type and the oil type to be supplied are different.

[0010]

According to the present invention, when the refueling nozzle is inserted into the refueling port of the fuel tank, the oil type detection sensor provided in the refueling nozzle detects the oil type from the vapor concentration in the fuel tank. As a result, the comparison means determines whether or not the oil type detected by the oil type detection sensor and the oil type specific to the weighing machine supplied from the oil supply nozzle match. When it is determined that the detected oil type is different from the oil type to be refueled, the alarm means issues an alarm to the operator to prevent erroneous oil supply.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the case where the oil supply apparatus of the present invention is applied to a fixed type oil supply apparatus will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is an overall configuration diagram of a fueling apparatus used in this embodiment. In FIG. 1, 1 is a weighing machine provided in the site of a gas station, and 2 is a weighing machine. With piping,
A pump 4 driven by a pump motor 3 and a flow meter 5 are provided in the middle of the pipe 2, and a flow rate pulse transmitter 6 that transmits a flow rate pulse proportional to the flow rate is attached to the flow meter 5. Further, on the front surface of the weighing machine 1, a refueling amount display 7 for displaying the total refueling amount is provided.

Reference numeral 8 is a hose whose proximal end side is connected to the pipe 2, 9 is a fueling nozzle provided at the tip end of the hose 8, and the fueling nozzle 9 is opened to discharge the oil liquid to the fuel tank. You can do it. Reference numeral 10 denotes a nozzle accommodating portion provided on the side surface of the weighing machine 1, and the oil supply nozzle 9 is attached to and detached from the nozzle accommodating portion 10. The nozzle accommodating portion 10 is opened / closed in conjunction with the attachment / detachment of the oil supply nozzle 9. A nozzle switch 11 is provided to output a nozzle switch signal indicating that the refueling operation is being performed during closing. The nozzle switch 11 is a refueling work detection switch that detects the start and end of the refueling work.

Reference numeral 12 denotes an oil type detection sensor which is provided at the tip of the discharge pipe 9a of the oil supply nozzle 9 and detects the oil type from the vapor concentration of the oils in the fuel tank.
As shown in FIG. 3, a resistor 12a obtained by kneading a synthetic resin (Teflon) and a conductor (carbon and other inorganic substances),
The resistor 12a is made of synthetic resin (Teflon) and covers the resistor 12a.
A weak current is applied to the. This water repellent resin 12
b is not compatible with water vapor or the like, is impermeable to water droplets, and allows only the vapor of oils to pass through. The vapor of oils that has passed through the resin 12b is reversible with the Teflon of the resistor 12a. The resistance value of the resistor 12a changes due to the affinity with the. The degree of change in the resistance value depends on the density of the vapor concentration of the oil, and when the vapor of the oil disappears from the vicinity of the oil type detection sensor 12, the original resistance value is restored in a short time. That is, the oil type detection sensor 12 detects the vapor concentration of oils as a change in resistance value, in other words, as a change in output voltage.

Reference numeral 13 is an intake hose provided along the hose 8. One end of the intake hose 13 extends to the discharge pipe 9a of the oil supply nozzle 9 and is provided so as to surround the oil type detection sensor 12. It opens into the cylinder 14. In addition,
The tip end of the collecting cylinder 14 serves as a steam suction / exhaust opening end 14a, and the collecting cylinder 14 also serves as a protective member for the oil type detection sensor 12. On the other hand, the other end of the intake hose 13 extends into the weighing machine 1, and the intake pump 1 provided in the weighing machine 1 is provided.
It is connected to 5. Here, the intake pump 15 is composed of a motor capable of rotating in the forward and reverse directions and a gas pump driven by the motor (both not shown), and at the time of normal rotation, the oil is supplied from the collecting cylinder 14 side via the hose 13. The steam of the kind is sucked in, and at the time of reverse rotation, the air in the weighing machine 1 is discharged to the collecting cylinder 14 side. In the case of the present embodiment, the suction hose 13, the collecting cylinder 14, the suction pump 15 and the like constitute the vapor suction means.

In the figure, 16 is the discharge pipe 9 of the oil supply nozzle 9.
The insertion sensor 16 is provided at the tip of a, and the insertion sensor 16 is configured as an optical sensor including, for example, a light emitting element and a light receiving element, and detects the insertion state by the difference in brightness between the outside air and the inside of the fuel tank. An ultrasonic sensor may be used as the insertion sensor 16.

Next, 17 is a control device provided in the weighing machine 1. The control device 17 includes an oil type setting circuit 18, a comparison circuit 19, an AND circuit 20, a pump motor control circuit 21, and an intake pump control circuit 22. Etc. here,
The oil type setting circuit 18 sets a standard output voltage value output from the oil type detection sensor 12 for a specific oil type of the weighing machine 1, for example, gasoline. The comparison circuit 19 is the insertion sensor 1
After a predetermined time by the signal input from 6, the oil type detection sensor 1
The output voltage from No. 2 is compared with the set voltage value of the oil type setting circuit 18, and when the difference between the voltage values of the two is out of a predetermined allowable value, an operation prohibition signal is output. The AND circuit 20 outputs a refueling permission signal when signals are simultaneously input from the nozzle switch 11 and the insertion sensor 16, and outputs a refueling stop signal otherwise. Further, the pump motor control circuit 21 drives the pump motor 3 only while the refueling permission signal is input from the AND circuit 20, and when the operation prohibition signal is input from the comparison circuit 19, how to input the refueling permission signal. Regardless, the drive of the pump motor 3 is prohibited. further,
When a signal is input from the nozzle switch 11, the intake pump control circuit 22 reverses the intake pump 15 to perform an exhaust operation for a certain period of time, and when a signal is next input from the insertion sensor 16, the intake pump 15 rotates normally. For a certain period of time to perform inhalation operation (see FIG. 5).

Further, 23 is an alarm device (alarm means) such as a buzzer, a lamp, etc. The alarm device 23 detects the oil type and fuel detected by the oil type detection sensor 12 when an operation prohibition signal is inputted from the comparison circuit 19. When the oil type of the tank is different,
This is notified.

Although the present embodiment is configured in this way, the operation thereof will be described below, taking as an example the case where the type of oil supplied by the weighing machine 1 is gasoline.

First, when the fueling nozzle 9 is removed from the nozzle housing portion 10 in order to start the fueling work, the nozzle switch 11
Is turned on, and the intake pump control circuit 22 reversely drives the intake pump 15 for a predetermined time. As a result, the previous oil vapor remaining in the intake hose 13 is discharged into the atmosphere.

Next, when the discharge pipe 9a of the refueling nozzle 9 is inserted into the refueling port of the fuel tank to refuel gasoline,
The insertion sensor 16 detects this and an insertion detection signal is output. As a result, the AND circuit 20 outputs a refueling permission signal to the pump motor control circuit 21.

On the other hand, when an insertion detection signal is output from the insertion sensor 16 to the intake pump control circuit 22, the intake pump control circuit 22 normally rotates the intake pump 15 for a certain period of time to collect the steam remaining in the fuel tank. Cylinder 14, intake hose 13
Aspirate through. As a result, the oil type detection sensor 12 located in the collection cylinder 14 is exposed to the sucked oil vapor, the resistance value of the resistor 12a changes, and before and after the insertion into the fuel tank. The output voltage changes.

When the oil remaining in the fuel tank is gasoline, the amount of vaporized vapor is large, so that the resistance value of the resistor 12a becomes large and the output voltage rises. At this time, since the reference voltage value corresponding to the predetermined allowable range of gasoline is set in the oil type setting circuit 18, the comparison circuit 19 receives the signal from the insertion sensor 16 and after a predetermined time, the comparison circuit 19 outputs the oil type detection sensor 12 It is determined that the fuel tank is for gasoline based on the output voltage.

Thus, since the operation prohibiting signal from the comparison circuit 19 is deactivated, the pump motor 3 is started together with the refueling permission signal output from the AND circuit 20, and the weighing machine 1 maintains the refuelable state. Then, when the refueling nozzle 9 is opened, the gasoline in the underground tank is refueled from the refueling nozzle 9 via the pipe 2, the pump 4, the flow meter 5, and the hose 8. When the desired amount of refueling is reached, the refueling nozzle 9 is closed and withdrawn from the fuel tank, the insertion sensor 16 turns "OFF", the pump motor 3 stops, and the refueling nozzle 9 is moved to the nozzle housing portion 10. When turned on, the nozzle switch 11 is turned off, and the refueling work is completed.

On the other hand, when the oil remaining in the fuel tank is light oil, the amount of vaporized gas is small, so that the resistance value of the resistor 12a of the oil type detection sensor 12 hardly changes. Therefore, the output voltage output from the oil type detection sensor 12 does not reach the predetermined allowable value range, and the comparison circuit 1
9 determines that the oil in the fuel tank is light oil and does not deactivate the operation prohibition signal.

As a result, the pump motor control circuit 21 receives the operation prohibition signal, stops the drive of the pump motor 3, and the alarm device 23 also operates according to the operation prohibition signal, so that the gasoline to be refueled is not oiled. The operator is alerted that the species are different. This prevents accidental refueling due to some mistake.

In the embodiments, gasoline and light oil are exemplified as the oils, but the present invention is not limited to these and can be applied when other oils such as kerosene are supplied. Although the suction means including the suction hose 13, the suction pump 15 and the like has been illustrated as the suction means, an ejector pump may be disposed in the middle of the relief pipe of the pump 4 and the oil liquid relieved by the pump 4 may be used. On the other hand, a small intake pump may be attached to the refueling nozzle 9. Further, although the fixed type weighing machine is exemplified as the oil supply device of the present invention, it may be applied to a suspension type weighing machine in which an oil supply nozzle is suspended from a high place of a gas supply station.

[0028]

The oil supply device according to the present invention is as described above in detail, and the oil type detection sensor for detecting the oil type from the vapor concentration of the fuel tank, and the oil type and the oil supply detected by the oil type detection sensor. The comparison means for comparing the oil type supplied from the nozzle, and the alarm means for issuing an alarm when it is determined by the comparison means that the detected oil type and the oil type to be supplied are different from each other. Produce an effect.

Since the oil type detection sensor detects the vapor concentration of oils, it is not necessary to immerse the sensor in oils, and even if the fuel tank has a complicated fuel filler port shape, the oil type sensor can be reliably used. The species can be identified.

When the comparison means determines that the oil type detected by the oil liquid detection sensor and the oil type to be supplied are different, the alarm means can notify the operator of an oil type error, so that a mistake is made. Accidental refueling due to factors such as the above can be reliably prevented.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a fixed oil supply device used in this embodiment.

FIG. 2 is an enlarged view of a main part of a tip end portion of the oil supply nozzle shown in FIG.

FIG. 3 is a vertical sectional view showing an oil type detection sensor.

FIG. 4 is a block diagram showing a circuit configuration of a control device.

FIG. 5 is an operation explanatory view showing the operation of the intake pump control circuit.

[Explanation of symbols]

 1 Measuring Machine 2 Piping 3 Pump Motor 4 Pump 5 Flow Meter 8 Hose 9 Refueling Nozzle 9a Discharge Pipe 11 Nozzle Switch 12 Oil Type Detection Sensor 12a Resistor 12b Water Repellent Resin 13 Intake Hose 14 Cylinder 15 Intake Pump 16 Insertion Sensor 17 Control Device 23 Alarm

Claims (1)

[Claims] 1. A pipe having one end connected to a tank, a pump provided in the middle of the pipe, a pump driven by a pump motor, and a flow meter for measuring the amount of oil supply, and a pipe provided at the other end of the pipe via a hose. A fueling device configured to discharge the oils sent from the pump to a fuel tank, and an oil type detecting sensor for detecting an oil type from the vapor concentration of the fuel tank, and the oil type detecting sensor. Comprising a comparing means for comparing the detected oil type with the oil type supplied from the refueling nozzle, and an alarm means for issuing an alarm when the comparing means determines that the detected oil type and the oil type to be supplied are different. A refueling device characterized by the above.