JPH0733198A - Suspended feed oil device - Google Patents

Abstract

PURPOSE:To prevent a detecting sensor of oil kinds from being immersed into oil on inserting a feed oil nozzle into the oil inlet filled with oil. CONSTITUTION:A feed oil nozzle 6 is lowered from a delivery unit 4 of the high position 3 of a gas station. A vapour suction tube 30 sucking the vapour remaining in a tank is wound spiraly in a feed oil hose 5. A pressure sensor 37 and a detecting sensor 38 of oil kinds are arranged in an air vent pipe 32 for detecting the oil kinds, connected to the vapour suction tube 30. On sucking the vapour, when the pressure sensor 37 detects the change of pressure as the oil is sucked into the vapour suction tube 30, a valve 39 for suction air is closed to suspend the suction of the air suction pump 35 and a valve 40 is opened to discharge the oil in the vapour suction tube 30 by an exhaust air pump 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension type oil supply device,
In particular, a suspension type refueling device that lowers a refueling nozzle connected to the tip of a refueling hose from a delivery unit installed at a high place in a refueling station to refuel an automobile fuel tank or the like with an oil liquid such as gasoline or light oil Is.

[0002]

2. Description of the Related Art In gas stations, for gasoline supply,
An oil supply device is installed for each type of oil supply, such as for supplying light oil.

Therefore, in this type of refueling device, when refueling a fuel tank or the like of a customer's automobile, for example, a wrong oil is supplied by mistakenly using a refueling device for supplying light oil when gasoline should be supplied. In order to prevent seed refueling accidents, there is a tendency to have an oil type discrimination function. Then, the refueling device having the oil type discriminating function sucks the vapor of the residual oil liquid in the fuel tank for refueling and applies the vapor to an oil vapor sensor (oil type detection sensor) for discriminating the oil type. The type of oil is discriminated, and refueling can be performed only when the type of oil remaining in the fuel tank matches the type of oil supplied from a predetermined refueling device.

As an example of the oil vapor sensor, a semiconductor gas sensor for detecting vapor pressure of vapor remaining in a fuel tank of an automobile is used. The saturated vapor pressure of vapor varies depending on the type of oil (for example, gasoline and light oil), and gasoline has a higher saturated vapor pressure than light oil. Therefore, the output of the oil vapor sensor becomes high when the vapor of gasoline is sucked, and the output of the oil vapor sensor becomes low when the vapor of light oil is sucked.

Further, the above-mentioned oil type discriminating function tends to be adopted not only in the above-ground type refueling device but also in a suspension type refueling device provided with a delivery unit at a high place of a refueling station.
A suspension type oil supply device having an oil type discrimination function is being developed.

In this type of suspension type refueling device, a delivery unit is provided at a high place of a refueling place such as a ceiling or a canopy, and a refueling hose having a refueling nozzle connected to the tip thereof is suspended. Includes a refueling nozzle elevating mechanism including, for example, a hose reel around which a refueling hose is wound and a motor that drives the hose reel to rotate in the forward and reverse directions. At the start of refueling work, the hose reel is rotated forward to lower the refueling nozzle at a height position that does not hinder the running of the vehicle to a height position suitable for refueling work. When the refueling work is completed by inserting it into the refueling port and operating the nozzle lever, the refueling nozzle at the height position suitable for the refueling work is raised to a position where it does not interfere with the running of the vehicle. ing.

And, it is provided for each refueling device,
A metering unit consisting of a pump for supplying the oil liquid from the oil tank to the oil supply nozzle and a flow meter for measuring the amount of oil discharged from the oil supply nozzle, and an oil supply amount indicator for displaying the oil supply amount are It is installed in a place apart from the veri unit, for example, in a measuring room of a gas station building or on a wall in the gas station where visibility is good.

[0008]

However, in the above-mentioned suspension type refueling device, unlike the ground-installed refueling device, the vapor suction pump and the vapor exhaust pump together with the metering unit and the refueling amount indicator are not the delivery unit. It will be installed collectively in a distant place.

The oil vapor sensor may be installed in the delivery unit in order to shorten as much as possible the time until the vapor remaining in the fuel tank of the automobile is sucked by the vapor suction pump to determine the oil type. desirable. or,
One end of a vapor suction tube provided along the oil supply hose is connected to the oil vapor sensor, and the other end of the vapor suction tube reaches the tip of the oil supply nozzle and opens.

In the case of such a suspension type oil supply device, the distance from the oil supply nozzle to the oil vapor sensor is longer and the distance from the oil vapor sensor to the intake pump is longer than that of the above ground type oil supply device, so that it is more powerful. An intake pump with a large suction capacity is used.

Therefore, when a worker at the gas filling station turns on the cord switch of the hand switch box at the start of work, the fueling nozzle at the standby position is lowered to the fueling position and the intake pump is activated. Therefore, when the fueling nozzle is inserted into the fueling port of the automobile, the vapor remaining in the fuel tank of the automobile is sucked by the vapor suction pipe and supplied to the oil vapor sensor.

However, if the worker of the gas station accidentally inserts the fueling nozzle deeply into the fueling port of the automobile or the motorcycle that has finished refueling, the liquid level reaches near the fueling port, so vapor suction is performed. The other end opening of the tube will be thrust into the liquid surface. Moreover, as the suction pump, a pump with a larger suction force than the ground-mounted type is used, so when the other end opening of the vapor suction tube is inserted into the liquid surface, the vapor suction tube will be filled with oil liquid. It is supplied to the oil vapor sensor. In that case, the oil vapor sensor is composed of a semiconductor type gas sensor that detects the vapor pressure of the vapor as described above, and since it is configured to output a voltage value according to the vapor, the vapor detection surface of the sensor is immersed in the oil liquid. If this happens, the type of oil cannot be discriminated.

Therefore, an object of the present invention is to provide a suspension type oil supply device which solves the above problems.

[0014]

DISCLOSURE OF THE INVENTION The present invention is an elevator mechanism provided in a delivery unit suspended at a high place of a gas filling station and for moving up and down a fuel filling nozzle connected to the tip of a fuel filling hose, and the fuel filling nozzle. So as to suck in the vapor remaining in the tank for refueling work, one end is opened to the tip side of the refueling nozzle, and the other end is a vapor suction passage that extends along the refueling hose to the delivery unit. An oil type detection means provided in the vapor suction passage for detecting an oil type based on the sucked vapor; and an intake means connected to the other end of the vapor suction passage for sucking air in the vapor suction passage. An exhaust means connected to the other end of the vapor suction passage for exhausting the air in the vapor suction passage; a pressure detection means for detecting the pressure in the vapor suction passage; When the force detection means detects a change in pressure when the hydraulic fluid is sucked into the vapor suction passage,
Control means for interrupting the intake by the intake means and discharging the oil liquid in the vapor suction passage by the exhaust means.

[0015]

When the pressure detecting means detects the pressure change when the oil liquid is sucked into the vapor suction passage during the vapor suction, the suction by the suction means is interrupted and the air in the vapor suction passage is exhausted by the exhaust means. Switch to allow. As a result, even if the operator of the gas station mistakenly inserts the refueling nozzle into the refueling port that has been refueled and the oil liquid is sucked into the vapor suction passage, the oil liquid in the vapor suction passage reaches the oil type detection means. Can be prevented.

[0016]

1 to 3 show an embodiment of a suspension type oil supply device according to the present invention.

In each figure, 1 is a gas station site, and 2 is a building (office) provided on the gas station site 1. Above the site 1, a high place 3 including a ceiling, beams, a canopy, etc. is formed.

The suspension type refueling device has a delivery unit 4 installed at the high place 3, a refueling hose 5 fed from the delivery unit 4, and a refueling nozzle 6 connected to the refueling hose 5. In the case of the present embodiment, a single suspension type weighing machine in which only one refueling hose 5 having a refueling nozzle 6 at the tip of the delivery unit 4 is suspended is arranged at the high place 3.

Inside the wall 2a of the building 2 and at a high place 3, a liquid supply pipe 7 for supplying an oil liquid to the oil supply hose 5 and the oil supply nozzle 6 is provided. One end of this liquid supply pipe 7 is connected to the inside of the delivery unit 4, and the other end is connected to an underground tank (not shown) installed underground in the site 1. Then, the liquid delivery pipe 7 arranged in the wall 2a of the building 2.
A refueling pump 9 driven by a pump motor 8 and a flow meter 10 for measuring the refueling amount are provided in the middle of the flow rate, and a flow rate pulse transmitter 11 for transmitting a flow rate pulse signal proportional to the flow rate is attached to the flow meter 10. ing. The pump motor 8 and the flow rate pulse transmitter 11 are connected to a control circuit (control means) 18 provided in the building 2.

Further, the delivery unit 4 installed at the high place 3 includes a rotatably mounted hose reel 12, a hose lifting motor 14 for rotating the hose reel 12 forward and backward through a chain 13, and a fuel supply. Position detector 1 for detecting the rotational position of the hose reel 12 according to the vertical position of the nozzle 6.
And an elevating mechanism 16 composed of 5 and 5. One end of the liquid supply pipe 7 is connected to the hose reel 12, and the oil supply hose 5 is provided by winding the base end of the liquid supply pipe 7 in communication with the liquid supply pipe 7. Is installed.

In the position detector 15 provided in the delivery unit 4, the refueling nozzle 6 is located at the upper end position (storage position) C near the delivery unit 4 according to the rotation of the motor 14 or the hose reel 12. Storage position detection switch for detecting that the vehicle is located, standby position detection switch for detecting that the vehicle is located at a standby position B approximately 1.8 m from the ground, and detecting that the vehicle is located at a refueling position A that is suitable for refueling the vehicle. A refueling position detection switch (both not shown) is incorporated. Further, each switch of the position detector 15 and the motor 14 are connected to a control device 18 provided in the building 2, respectively.

Reference numeral 19 is an indicator provided at a position where the customer can easily see it, such as in a high place 3, for example, a refueling amount indicator 19a and an alarm device 19b for issuing an alarm (alarm or lamp blinking) when the oil types do not match. Have. As the oil supply amount indicator 19a, an indicator such as a reversing plate indicator or a plasma indicator is used. The oil supply amount indicator 19a is connected to the flow rate pulse transmitter 11 via a counting circuit and a drive circuit (not shown) built in the control device 18, and calculates based on the flow rate pulse signal from the flow rate pulse transmitter 9. It is configured to display the amount of refueling performed.

Further, a hand switch box 20 is provided so as to be interposed between the refueling hose 5 and the refueling nozzle 6, and the hand switch box 20 raises and lowers the hand refueling hose 5 at the hand up and down switch 22.
And an oil type detection release switch 23 for releasing the oil type detection before refueling. And hand raising switch 2
1, hand lowering switch 22, oil type detection release switch 23
Is connected to the control device 18 via a signal line (not shown) built in the fuel supply hose 5.

The hand lowering switch 22 can be operated by pulling down the cord 24, whereby the refueling hose 5 is extended to lower the refueling nozzle 6 from the standby position B to the refueling position A. Further, after the refueling work is completed at the refueling position A, when the hand raising switch 21 of the hand switch box 20 is pressed down, the refueling hose 5 is wound into the delivery unit 4 by the elevating mechanism 16 and the refueling nozzle 6 is Ascend to the standby position B.

Further, the hand lowering switch 22 also functions as a reset switch for the fueling amount indicator 19a in preparation for the present refueling work. Therefore, when the hand lowering switch 22 is operated by the cord 24, the refueling amount display is made. The oil supply amount display at the time of the last oil supply operation of the container 19a becomes zero and the oil supply nozzle 6 descends to the oil supply position A.

A main switch box 24 is installed on the wall surface 2a of the building 2, and the main switch box 24 has a main raising switch 25 for raising the refueling nozzle 6 at the standby position B to the upper end position C. And a main lowering switch 26 for lowering the refueling nozzle 6 at the upper end position C to the standby position B.

The main switch box 24 is connected to the controller 18, and the hose reel 11 is driven and controlled in the hose winding direction or the hose unwinding direction by operating the main raising switch 25 and the main lowering switch 26.

Reference numeral 30 denotes a flexible vapor suction tube (vapor suction passage), one end of which communicates with a vapor suction port 31 opening at the tip of the oil supply nozzle 6, and the other end of which is the oil type in the delivery unit 4. Vent pipe for detection (vapor suction passage) 32
It is connected to the. Further, the vapor suction tube 30 is spirally wound around the outer circumference of the fuel supply hose 13 so as to be able to expand and contract according to the elevation of the fuel supply hose 13, and the hand switch box 20 so as not to disturb the operation of the hand switch box 20. Is inserted into the inside of the fuel tank and reaches the refueling nozzle 6. Further, the vapor suction tube 30 is provided with a signal line (not shown) that connects the hand switch box 20 and the control circuit 18.

In the delivery unit 10, the end of the oil type detecting vent pipe 32 is bifurcated and connected to the intake vent pipe 33 and the exhaust vent pipe 34. The intake ventilation pipe 33 and the exhaust ventilation pipe 34 extend along the high place 3 and the wall portion 2a of the building 2 and are respectively connected to the building 2
It is connected to an intake pump (intake means) 35 and an exhaust pump (exhaust means) 36 installed inside.

Further, a pressure sensor (pressure detection means) 37 for detecting the pressure in the oil type detection ventilation pipe 32 and a refueling nozzle 6 are provided in the middle of the oil type detection ventilation pipe 32 in the delivery unit 10. An oil type detection sensor (oil vapor sensor) 38 for detecting the oil type from the oil vapor pressure sucked from the tip is provided.

Reference numeral 39 is an intake on-off valve which is an electromagnetic valve for opening and closing the intake ventilation pipe 33, and 40 is an exhaust on-off valve which is an electromagnetic valve for opening and closing the exhaust ventilation pipe 34. One on-off valve 39 is opened at the time of oil type determination to open the intake ventilation pipe 33, as will be described later. Therefore, the air in the vapor suction tube 30 is sucked by the suction force of the suction pump 35, and the oil in the fuel tank (not shown) sucked by the vapor suction tube 30 is detected together with the oil type detection sensor 3.
8 are supplied.

The other on-off valve 40 is opened after the oil type is determined, and the exhaust ventilation pipe 34 is opened. Therefore, the air in the vapor suction tube 30 is backflowed by the exhaust pump 36 and exhausted, and together with the vapor in the fuel tank (not shown) supplied to the oil type detection sensor 38, the vapor suction port 31 of the refueling nozzle 6 is discharged. More exhausted to the atmosphere. That is, after the oil type is determined, the oil type detecting vent pipe 32 and the exhaust pump 36 are connected to purge the vapor adhering to the sensor 38 and the vapor remaining in the vapor suction tube 30 to the atmosphere.

As the oil type detection sensor 38, for example, a semiconductor type gas sensor that changes the signal output according to the vapor pressure of vapor is used. The saturated vapor pressure differs depending on the type of oil remaining in the fuel tank (gasoline and light oil in this embodiment), and gasoline has a higher saturated vapor pressure than light oil.
Therefore, when the vapor of gasoline is sucked, the sensor 38
Output becomes high, and the output of the sensor 38 when the vapor of light oil is sucked becomes low. As described above, since the semiconductor type gas sensor is used, if the oil liquid directly adheres to the oil type detection sensor 38, the oil type detection sensor 38 cannot detect the oil type thereafter and stops the oil type detection. Therefore, it is necessary to clean the vapor detection portion of the oil type detection sensor 38 cleanly or replace it with a new oil type detection sensor 38.

When the output of the sensor 38 is supplied to the control device 18, the control device 18 determines the oil type of the fuel tank to be refueled based on the output from the sensor 38, that is, the sucked vapor, and this determination is performed. It is determined whether or not the oil type of the fuel tank and the oil type supplied from the preset fueling nozzle 6, that is, the oil type of the underground tank (not shown) match.
The refueling pump 9 is started only when the both match. That is, the control circuit 18 determines the oil type based on the detection signal from the oil type operation processing unit 18A that raises and lowers the oil supply nozzle 6 and starts and stops the pump motor 8 as described later, and the oil type detection sensor 38. An oil type confirmation processing means 18B to be performed,
Have.

The pressure sensor 37 detects the pressure in the vapor suction tube 30 and outputs a signal of a voltage value having a magnitude corresponding to the pressure value. For example, as shown in FIG. 2, the pressure sensor 37 outputs 0 V when the pressure inside the vapor suction tube 30 is atmospheric pressure, and the vapor suction tube 3
Half of 0 is blocked by oil liquid and vapor suction tube 30
When the internal pressure reaches a value immediately before the sensor danger, 3V is output, and when the entire vapor suction tube 30 is blocked by the oil liquid and the pressure inside the vapor suction tube 30 reaches the sensor danger value, 4V is output.

The output of the pressure sensor 37 is the control circuit 18
The control circuit 18 determines whether the oil liquid has been sucked into the vapor suction tube 30 based on the voltage value from the pressure sensor 37 as described later. If it is determined that the oil liquid has been sucked into the vapor suction tube 30, the suction of the vapor is stopped and the outside air is supplied into the vapor suction tube 30 so that the oil liquid detects the oil type detection sensor 3
8 is prevented and the oil liquid is discharged from the vapor suction port 31 of the oil supply nozzle 6.

Now, the processing executed by the control circuit 18 will be described. The control circuit 18 processes in parallel the refueling work process shown in FIG. 3 and the oil type confirmation process shown in FIGS. 4 to 6.

First, the refueling work process will be described with reference to FIG. 3, and then the oil type confirmation process will be described with reference to FIGS. 4 to 6.

In FIG. 3, in step S1 (hereinafter, "step" is omitted), the control circuit 18 pulls down the cord 24 of the hand switch box 20 when the refueling nozzle 6 is in the standby position B and lowers the hand. It is checked whether or not the switch 22 is operated to be turned on, and it is checked at S2 whether or not the main raising switch 25 of the main switch box 24 is operated to be turned on. In S2, when the main raising switch 25 is not turned on, the process returns to S1 again, and the above checking process is repeated. When it is confirmed in S2 that the main raising switch 25 is turned on, the operation moves to the hose storing operation.

However, when the hand lowering switch 22 is turned on in S1, the process proceeds to S3, in which the hose raising / lowering motor 14 of the raising / lowering mechanism 16 is driven downward to lower the refueling hose 5. In S4, when the position detector 15 detects that the refueling nozzle 6 has descended to the refueling position A, S
Go to step 5 and stop the hose lifting motor 14.

Subsequently, when the refueling nozzle 6 is inserted into the refueling port of the automobile, the result of the below-described oil type confirmation process is confirmed (S6).

At S6, when the result of the oil type confirmation processing is not "oil type OK", that is, the oil type of the fuel tank and the oil type (oil type of the underground tank) supplied from the preset oil supply nozzle 6 If they do not match, the process proceeds to S7 and S8, and it is checked whether the oil type detection release switch 23 of the hand switch box 20 has been turned on and whether the hand raising switch 21 has been turned on.

If the oil type detection release switch 23 is turned on in S7, the result of the oil type determination process in S6 is invalidated and the process proceeds to S9. On the other hand, in S8, when the hand raising switch 21 is turned on due to the oil type mismatch, the process proceeds to S14, which will be described later, and the processes after S14 are executed.

As a result of the oil type confirmation processing in S6, "Oil type O
"K" or in S7, the oil type detection release switch 23
When is turned on, the process proceeds to S9 and the pump motor 8
Is started, and the display of the refueling amount indicator 19a is reset to zero in S10.

Subsequently, the refueling amount measurement display process is executed (S11).

This refueling amount measurement display processing is performed by the refueling nozzle 6
The amount of oil supplied to the fuel tank by the valve opening operation is measured by the flow meter 10, the pulses output from the flow rate pulse transmitter 11 of the flow meter 10 are integrated, and the integrated value is added. It is displayed on the display 19a.

In next step S12, it is checked whether or not the hand raising switch 21 is turned on. When refueling of the fuel tank is completed and the hand raising switch 21 is turned on, the process proceeds to S13, and the pump motor 8 is stopped. Then, the process proceeds to S14, in which the hose elevating motor 14 of the elevating mechanism 16 is driven to ascend to elevate the fuel supply hose 5.

When the position detector 15 detects that the refueling nozzle 6 has moved to the standby position B in S15, the process proceeds to S16, in which the hose lifting motor 14 is stopped. This completes the series of processes for the refueling work.

Next, the above-described oil type confirmation processing will be described with reference to FIGS. 4 to 6.

In FIG. 4, when the hand lowering switch 22 is turned on at SS1, the process proceeds to SS2 to drive the intake pump 35. Then, the intake opening / closing valve 39 is opened to open the intake ventilation pipe 33, and the exhaust opening / closing valve 40 is closed to close the exhaust ventilation pipe 34. As a result, the atmosphere at the tip of the refueling nozzle 6 is changed to the vapor suction port 3
It is collected from No. 1 and is sucked toward the oil type detection sensor 38 by the suction force of the suction pump 35 via the vapor suction tube 30 (SS3).

Next, the timing t of the judgment time is started (SS
4). During this time, the operator of the fueling station inserts the fueling nozzle 6 lowered to the fueling position A into the fueling port of the fuel tank.

Therefore, the vapor remaining in the fuel tank is sucked by the vapor suction tube 30 through the vapor suction port 31 opened at the tip of the fueling nozzle 6 and supplied to the oil type detection sensor 38.

At the next SS5, the output of the pressure sensor 37 and the output of the oil type detection sensor 38 are sampled. Then, in SS6, it is checked whether or not the supply oil type determination condition is satisfied.

That is, as the oil type detection sensor 38, a semiconductor type sensor whose output changes according to the vapor pressure of the vapor is used as described above. The control device 18 determines whether or not the output level of the oil type detection sensor 38 exceeds a preset oil type determination level, for example, on condition that the fuel nozzle 6 is inserted in the fuel inlet of the fuel tank. It determines whether the type of oil is gasoline or light oil.

That is, since the saturated vapor pressure of light oil is lower than that of gasoline, the output level L ₁ of the oil type detection sensor 38 in the state of being inserted into the oil supply port of the fuel tank of light oil and the oil supply port of the fuel tank of gasoline. The output level L ₂ of the oil type detection sensor 38 in the state of being inserted into the control circuit 18 is stored in the control circuit 18 in advance. When the type of oil underground tank has to be gasoline, checks whether the output level L ₃ of the oil type detecting sensor 38 satisfies the gasoline determination condition (L ₃ ≧ L ₁₎ in SS6, oil type when the output level of the detection sensor 38 does not satisfy the determination condition of the gasoline (with _{L 1> L 3 ≧ L 2} , t = T O) SS7 to advances oil Seeds output level of the sensor 38 is diesel determination condition Check if you are satisfied.

When the output level of the oil type detection sensor 38 does not satisfy the light oil judgment condition in SS7, the process proceeds to SS8 to check whether a predetermined judgment time T _O (for example, about 3 seconds) has been exceeded. If it is still within the judgment time, the process proceeds to SS9, and the detected value of the pressure sensor 37 is such that half of the vapor suction tube 30 described above is blocked by the oil liquid and the pressure in the vapor suction tube 30 becomes the value immediately before the sensor danger. It is checked whether or not the voltage value of 3V has reached 3V.

When the detected value of the pressure sensor 37 is 3 V or less in SS9, the process returns to SS5 and the above-mentioned steps SS5 to SS9 are repeated.

However, at SS6, the oil type detection sensor 38
When the output level of satisfies the judgment condition of gasoline,
Judging that the oil type of the underground tank and the oil type of the fuel tank of the car are the same, proceed to SS10, and "Instruction of oil type OK"
Set. Then, in SS11 of FIG. 5, the intake on-off valve 39 is closed and the exhaust on-off valve 40 is opened. Then, SS12 is instructed to stop the intake pump 35.

Further, the time counting of the judgment time is finished at SS13, and the process goes to SS14 to drive the exhaust pump 36. As a result, the air pumped by the exhaust pump 36 passes through the exhaust ventilation pipe 34 and passes through the vapor suction tube 3
Supplied to zero. Therefore, the vapor adhering to the oil type detection sensor 38 and the vapor remaining in the vapor suction tube 30 are evaporated by the air flow from the exhaust pump 36 and pass through the vapor suction tube 30 together with the air flow to suck the vapor. Exhausted into the atmosphere through the mouth 31.

At the next SS15, the oil type detection sensor 3
8 and the cleaning of the vapor suction tube 30 are started, and the timing of the cleaning time is started. While this cleaning process is being executed, the oil supply pump 9 is activated as described above, and the oil supply operation described in S9 to S12 of FIG. 3 is executed.

After that, the program proceeds to SS16, and it is checked whether or not the hand raising switch 21 is turned on. This is the same processing as S12 described above, and it is confirmed that the refueling work is completed.

Subsequently, in SS17, the above-mentioned SS10 is executed.
Check whether the "Oil type OK instruction" set in step 4 is still set. If this "instruction of oil type OK" is set, proceed to SS18 and select "oil type OK".
Reset the instructions.

At the next SS19, when the position detector 15 detects that the refueling nozzle 6 has moved up to the standby position B, the process proceeds to SS20 and it is checked whether or not a predetermined cleaning time has passed. . When the time of this cleaning time reaches a predetermined time, SS21
Then, the exhaust pump 36 is stopped, and the time of the cleaning time is finished at SS22 to finish the oil type confirmation work.

In SS7, the oil type detection sensor 38
When the output level of 1 satisfies the determination condition of light oil, it is determined that the oil type of the fuel tank is light oil, the process proceeds to SS23, and an alarm of the oil type mismatch is issued from the alarm device 19b to notify the operator. Therefore, without setting "Oil type OK instruction", S
The above-mentioned cleaning work is executed by executing the processing after S11. In this case, the refueling pump 9 is not started unless the operator operates the oil type detection release switch 23 as shown in S7 and S8 of FIG. When the "instruction of oil type OK" is not set in SS17, the process proceeds to SS24, and the above-mentioned oil type inconsistency alarm is stopped.

Further, in SS8, when the time of the determination time has passed the preset determination time, the process proceeds to SS25 and an oil type determination impossible alarm is issued. After that, SS in FIG.
In step 26, the same processing as SS11 to SS15 described above is executed. That is, the intake on-off valve 39 is closed and the exhaust on-off valve 40 is opened at SS26. Then, SS27 is instructed to stop the intake pump 35.

Further, the time counting of the judgment time is finished at SS28, and the process goes to SS29 to drive the exhaust pump 36. As a result, the air pumped by the exhaust pump 36 passes through the exhaust ventilation pipe 34 and passes through the vapor suction tube 3
Supplied to zero. Therefore, the vapor adhering to the oil type detection sensor 38 and the vapor remaining in the vapor suction tube 30 are evaporated by the air flow from the exhaust pump 36 and pass through the vapor suction tube 30 together with the air flow to suck the vapor. Exhausted into the atmosphere through the mouth 31.

In the next SS30, the oil type detection sensor 3
8 and the cleaning of the vapor suction tube 30 are started, and the timing of the cleaning time is started. And SS
Proceeding to 31, it is checked whether or not the oil type detection canceling switch 23 is turned on. When the oil type detection release switch 23 is not operated to be turned on, the process proceeds to SS32 and it is checked whether or not the hand raising switch 21 is operated to be turned on.

If the hand raising switch 21 is not turned on, the process returns to SS31. Further, when the oil type detection release switch 23 is turned on in SS31, the process proceeds to SS33 to stop the oil type mismatch alarm, and further in SS34, the operator manually supplies oil by confirming the oil type. A manual judgment refueling alarm for notifying the operator of the fact is issued from the alarm device 19b.

Then, at SS35, the hand raising switch 21
Check if is turned on. When the hand raising switch 21 is operated to be turned on, the refueling is completed by the manual confirmation operation, and the refueling is returned to the refueling by the oil type confirmation processing based on the output of the oil type detection sensor 38, so the manual determination refueling alarm is stopped. After that, SS19-SS
22 is executed.

Further, in SS32, if the hand raising switch 21 is turned on, there is no possibility of refueling with a different oil type, and therefore the process proceeds to SS37 to stop the oil type mismatch warning. After that, the processing of SS19 to SS22 is executed.

Further, the operator of the gas filling station may erroneously insert the fueling nozzle 6 deeply into the fueling port of the automobile or the motorcycle which has finished refueling. In that case, since the liquid level reaches near the fuel filler port, the vapor suction port 31 will be thrust into the liquid level of the fuel filler port. Moreover,
As the suction pump 35, a pump having a larger suction force than that of the ground-installed type is used. Therefore, when the vapor suction port 31 is inserted into the liquid surface of the oil supply port, the vapor suction port 31 enters the vapor suction pipe 30. Oil type sensor 3 filled with oil
8 is likely to be supplied.

Therefore, in SS9, when the detected value of the pressure sensor 37 becomes 3 V or more, the pressure in the vapor suction tube 30 becomes the value immediately before the sensor danger, and more than half of the vapor suction tube 30 is oiled. Judged as being blocked by liquid. Therefore, SS9 pressure sensor 3
When the detected value of 7 becomes 3V or more, SS38
In order to prevent the oil type detection sensor 38 from being immersed in the oil liquid, the alarm device 19b issues an oil liquid suction alarm.

After that, the process proceeds to SS39 in FIG. 7 and the same processes as those in SS26 to SS30 described above are executed. That is, S
In S39, the intake on-off valve 39 is closed and the exhaust on-off valve 40 is opened. Then, SS40 is instructed to stop the intake pump 35.

Further, the time counting of the judgment time is finished at SS41, and the process goes to SS42 to drive the exhaust pump 36. As a result, the air pumped by the exhaust pump 36 passes through the exhaust ventilation pipe 34 and passes through the vapor suction tube 3
Supplied to zero. Therefore, the oil liquid sucked into the vapor suction tube 30 from the vapor suction port 31 at the tip of the oil supply nozzle 6 flows back by the air flow from the exhaust pump 36 and is returned from the vapor suction port 31 to the fuel tank.

The vapor adhering to the oil type detection sensor 38 also passes through the vapor suction tube 30 together with the air flow from the exhaust pump 36 and is exhausted from the vapor suction port 31 to clean the oil type detection sensor 38. .

As described above, even if the operator of the gas filling station accidentally inserts the fueling nozzle 6 deeply into the fueling port of the automobile or the motorcycle which has finished refueling, the pressure sensor 3
7 monitors the pressure change in the vapor suction tube 30, the oil type detection sensor 38 detects the vapor suction tube 30.
It can be prevented from being immersed in the oil liquid sucked into.

In the next SS43, the oil type detection sensor 3
8 and the cleaning of the vapor suction tube 30 are started, and the timing of the cleaning time is started. And SS
Proceeding to 44, it is checked whether the cleaning time has passed a preset predetermined time. When the time of the cleaning time does not reach the predetermined time, the process proceeds to SS45, and it is checked whether or not the hand raising switch 21 is turned on. Here, when the hand raising switch 21 is not turned on, the process returns to SS44 and SS44 and S
The process of S45 is repeated.

However, when the cleaning time exceeds the predetermined time in SS44, the process proceeds to SS46, the exhaust pump 36 is driven, and the oil suction alarm is stopped in SS47. Then, the time of the cleaning time is ended at SS48. After that, the process returns to SS2 described above, and the processes after SS2 are executed.

Therefore, when the cleaning of the oil type detection sensor 38 is completed by the above SS42 to SS44, the processing after SS2 is executed and the hand raising switch 2
It is possible to refuel another fuel tank as it is without operating the 1 to turn it on.

Further, in SS45, it is noticed that the operator of the gas station has inserted the fueling nozzle 6 deeply into the fueling port of the automobile or the motorcycle which has finished refueling by mistake. When the hand lift switch 21 is turned on and turned on, the process proceeds to SS49 to stop the oil liquid suction alarm. After that, SS19 described above
Then, the processing after SS19 is executed to finish the oil type confirmation work.

In the above embodiment, the suspension type oil supply device in which one delivery unit 4 is installed is taken as an example, but the present invention is not limited to this, and two or more delivery units are installed. It goes without saying that it can also be applied to a suspended refueling device.

Further, in the above embodiment, the delivery unit 4
Although the pressure sensor 37, the oil type detection sensor 38, the intake on-off valve 39, and the exhaust on-off valve 40 are provided therein, the invention is not limited to this.
For example, it goes without saying that the pressure sensor 37, the oil type detection sensor 38, the intake opening / closing valve 39, and the exhaust opening / closing valve 40 may be provided in the high place 3.

Further, in the above embodiment, the single suspension type weighing machine in which the one refueling hose 5 is suspended from the one delivery unit 4 has been taken as an example. Needless to say, the present invention can be applied to a double or multi-type suspended weighing machine in which the fuel supply hose 5 is suspended.

[0084]

As described above, in the suspension type oil supply apparatus according to the present invention, when the pressure detecting means detects the pressure change when the oil liquid is sucked into the vapor suction passage during the suction of the vapor, the suspension type oil supply device operates by the suction means. Since the intake is interrupted and the air is switched to exhaust the air in the vapor suction passage by the exhaust means, the worker at the filling station mistakenly inserts the refueling nozzle into the filled refueling port to suck the oil liquid into the vapor suction passage. Even if it is done, it is possible to prevent the oil liquid in the vapor suction passage from reaching the oil type detection means, and it is possible to prevent accidents due to erroneous operation in advance, so it is possible to improve the reliability of refueling work. It has features such as being able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a suspension type oil supply device according to the present invention.

FIG. 2 is a diagram showing characteristics of a pressure sensor.

FIG. 3 is a flowchart for explaining refueling work processing executed by a control circuit.

4 is a flow chart for explaining an oil type confirmation process executed by a control circuit in parallel with the refueling work process of FIG.

FIG. 5 is a flowchart for explaining a process executed subsequent to the process of FIG.

FIG. 6 is a flowchart illustrating a process that is executed after the process of FIG.

FIG. 7 is a flowchart illustrating a process that is executed subsequent to the process of FIG.

[Explanation of symbols]

 4 Delivery unit 5 Refueling hose 6 Refueling nozzle 12 Hose reel 14 Hose lifting motor 16 Lifting mechanism 18 Control device 19a Refueling amount display 19b Alarm 20 Hand switch box 21 Hand up switch 22 Hand down switch 23 Oil type detection release switch 30 Vapor suction tube 31 Vapor suction port 32 Oil type detection vent pipe 33 Intake air vent pipe 34 Exhaust vent pipe 35 Intake pump 36 Exhaust pump 37 Pressure sensor 38 Oil type detection sensor 39 Intake on-off valve 40 Exhaust on-off valve

Claims (1)

[Claims] 1. A lifting mechanism for raising and lowering a refueling nozzle connected to a tip of a refueling hose, provided in a delivery unit suspended at a high place of a refueling station, and a tank for performing refueling work by the refueling nozzle. A vapor suction passage having one end opened to the tip side of the refueling nozzle and the other end extending to the delivery unit along the refueling hose so as to suck the remaining vapor, and the vapor suction passage is provided in the vapor suction passage. An oil type detection means for detecting an oil type based on the sucked vapor, an intake means connected to the other end of the vapor suction passage for sucking air in the vapor suction passage, and the other end of the vapor suction passage And an exhaust unit for exhausting the air in the vapor suction passage, a pressure detection unit for detecting the pressure in the vapor suction passage, and a pressure detection unit for detecting the pressure in the vapor suction passage. A control means for interrupting intake by the intake means and discharging the oil liquid in the vapor suction passage by the exhaust means when a pressure change is detected when the oil liquid is sucked into the vapor suction passage. Suspended refueling device characterized by: