JPH11263399A - Oil feed apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil feed apparatus capable of detecting degradation of the operation of a valve element by an automatic valve closing mechanism, and rapidly giving an alarm or stopping the oil feed. SOLUTION: A pressure sensor 50 to detect the negative pressure is embedded in a negative chamber of an oil feed nozzle 8, and a pressure sensor 51 to detect the pressure in an oil feed pipe 6 is provided between the tip side of the oil feed pipe 6 and a flow meter 5. An abnormality alarm indicator 52 to indicate an abnormality in operating a valve element when degradation of the operation of the valve element is detected, is arranged on a front upper part of a device box body 2. A time ΔT is measured by the detected result of the pressure sensors 50, 51, the measured value is compared with the prescribed time T1 in a normal condition which is obtained in an experiment, etc., in advance, degradation of the operation of the valve element is detected and indicated on an abnormality alarm indicator 52, and degradation of the operation of the valve element is alarmed to a worker engaged in the oil feeding work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling device, and more particularly to a refueling device for detecting an abnormality of a refueling nozzle when a fuel tank is full.

[0002]

2. Description of the Related Art Oil stations (gasoline, light oil)
Each refueling device is installed. A pump as a means for pumping oil from the underground tank inside the refueling device,
Various devices such as a pump motor, a flow meter, and a solenoid valve are provided. A hose connected to the pump is drawn out from the front or side surface of the oil supply device, and an oil supply nozzle is connected to a hose tip.

[0003] The oil supply nozzle includes a nozzle body having an oil liquid flow path therein, a discharge pipe provided in the nozzle body to discharge the oil liquid to a fuel tank, and an opening and closing the flow path.
A valve body provided in the nozzle body to close the valve body, an operation lever manually operated to open and close the valve body, and an automatic lever when the vacuum chamber is in a negative pressure state with the valve body opened. There is widely known an automatic valve closing mechanism for automatically closing a valve body, and a negative pressure generating mechanism for bringing a negative pressure state into a negative pressure chamber of the automatic valve closing mechanism by the flow of oil during refueling. I have.

Here, the above-mentioned automatic valve closing mechanism includes a valve element engaging / disengaging mechanism for engaging and disengaging a valve element and an operation lever in a negative pressure chamber, and the negative pressure chamber is brought into a negative pressure state. As a result, the valve element engaging / disengaging mechanism is operated to release the engagement state between the valve element and the operation lever, and the valve element is automatically closed. In addition, the negative pressure generating mechanism for setting the negative pressure chamber of the automatic valve closing mechanism to a negative pressure state includes an air suction passage having one end opening to the distal end side of the discharge pipe and the other end opening to the negative pressure chamber, The air suction passage is opened, and the other end side is constituted by a negative pressure passage opened to a throttle passage (near the valve seat where the valve element is separated and seated) in the nozzle body.

[0005] The refueling nozzle provided with such an automatic valve closing mechanism or the like operates the operating lever with the tip end of the discharge pipe inserted into the fuel tank to open the valve body. The oil flowing in the road is discharged from the discharge pipe into the fuel tank. At this time, a negative pressure is generated in the negative pressure passage of the negative pressure generating mechanism due to the flow of the oil liquid (Venturi action), but the air in the fuel tank is automatically closed by sucking the air in the fuel tank from the air suction passage. The negative pressure chamber of the valve mechanism is kept at atmospheric pressure. Accordingly, the valve body engaging and disengaging mechanism holds the valve body and the operation lever in an engaged state (valve open state), and the oil is continuously supplied.

Next, when the fuel supply to the fuel tank proceeds and the level of the oil liquid rises to the tip of the discharge pipe, one end of the air suction passage opened at the tip of the discharge pipe is closed by the oil liquid. For this reason, the air in the negative pressure passage and the negative pressure chamber is sucked and the negative pressure chamber is brought into a negative pressure state, and the valve body engaging / disengaging mechanism releases the engaged state between the valve body and the operation lever to close the valve body. Let it go. As a result, the flow path is closed and the refueling is automatically stopped.

[0007]

However, in the above-described oil supply nozzle according to the prior art, the valve element is operated by the operation of the automatic valve closing mechanism. The operation of the valve body may become dull due to deterioration of the seal due to aging, expansion due to wear of the bearing of the valve body, and the like.

Conventionally, such deterioration of the operation of the valve element is a part where the quality of service is determined by the experience of a gas station worker, but cannot be judged by an unskilled gas station worker. Was. In addition, in self-service refueling in which a driver of an automobile refuels, it is necessary to frequently check a refueling nozzle in order to discover the deterioration of the operation of the valve body as described above.

Further, if the operation of the valve body is not noticed and the automatic valve closing mechanism is not operated, the oil liquid may leak out of the fuel tank during refueling. Could be

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a refueling device that detects deterioration of the operation of a valve element by an automatic valve closing mechanism and promptly notifies the fuel supply device.

[0011]

According to a first aspect of the present invention, there is provided an oil supply device having an automatic valve closing mechanism for closing a flow path by a negative pressure. First detecting means for detecting start, second detecting means for detecting blockage of the flow passage by the automatic valve closing mechanism, and operation time storing means for storing a time for operating the automatic valve closing mechanism in advance An operation time measurement unit that measures a time period from when the operation start of the automatic valve closing mechanism is detected by the first detection unit to when the blockage of the flow path is detected by the second detection unit; Control means for comparing the time measured by the operating time measuring means with the time stored in the operating time storing means and notifying when the measured time is longer than the stored time is provided. And

According to the first aspect of the present invention, the time from when the start of the operation of the automatic valve closing mechanism is detected by the first detecting means to when the blockage of the flow path is detected by the second detecting means is activated. It is measured by the time measuring means, and when the measured time is longer than the time stored in the operating time storage means, it is notified that the operation of the valve body is deteriorated. Can be easily recognized.

[0013]

FIG. 1 is a block diagram showing an embodiment of the present invention.
5 to FIG.

FIG. 1 is an overall configuration diagram of a refueling apparatus. In FIG. 1, a refueling apparatus 1 is installed at a refueling site of a refueling station, and pumps an oil liquid from an underground tank 3 of the refueling station into an apparatus housing 2. A pump 4 and a flow meter 5 for measuring the flow rate of the oil liquid sent from the pump 4 are provided. The pump 4 and the flow meter 5 are connected to an oil supply pipe 6 whose base end is connected to the underground tank 3. It is installed continuously.

The front end of the refueling pipe 6 is connected to the base end of a refueling hose 7 led out of the apparatus housing 2, and the front end of the refueling hose 7 is connected to a refueling nozzle 8 whose front end is inserted into a fuel tank of a vehicle. Is connected.

In the vicinity of the pump 4 in the device housing 2,
A pump motor 9 for driving the pump 4 is provided, and a pulse oscillator that converts a flow rate of the oil liquid measured by the flow meter 5 into a pulse signal and outputs the pulse signal near the flow meter 5. 10 are provided.

On the side surface of the apparatus housing 2, there is provided a nozzle holder 1 for retaining the refueling nozzle 8 during non-refueling work.
1 is provided, and inside the nozzle holder 11,
A nozzle switch 12 is provided for determining whether or not the refueling nozzle 8 is locked by the nozzle hook 11, that is, whether or not the refueling nozzle 8 is performing a refueling operation.

A flow meter 5 is provided on the upper part of the front surface of the device housing 2.
Is provided with a refueling amount display 13 for displaying the integrated value of the flow rate measured by the above.

Next, the configuration of the refueling nozzle 8 will be described with reference to FIGS. FIG. 2 is a longitudinal sectional view of the fueling nozzle 8, and FIG. 3 is a transverse sectional view of the fueling nozzle 8.

The fuel supply nozzle 8 includes a nozzle body 21 having an oil liquid flow path 20 therein, and a discharge pipe 22 provided at the tip end of the nozzle body 21 for discharging the oil liquid to a fuel tank.
A gripping portion 23 provided on the base end side of the nozzle body 21 and gripped by a refueling worker; a valve body 24 provided in the nozzle body 21 to open and close the flow path 20; And an operation lever 25 that is manually operated to open and close.

An annular valve seat 26 is provided inside the nozzle body 21 so as to be located in the flow passage 20. The valve body 24 is separated from and seated on the valve seat 26, whereby the flow passage 20 is closed.
Is opened and closed.

The nozzle body 21 faces the valve seat 26.
A valve shaft sliding hole 27 is formed at the other end of the valve shaft. A valve shaft 28 joined to the valve element 24 slides in the valve shaft sliding hole 27 in the lateral direction of FIGS. It is movably inserted. Here, the valve shaft 28 is composed of two members, a valve body side shaft 29 and a lever side shaft 30.

The valve body side shaft 29 is formed with an insertion hole 29A into which the small diameter portion 30A of the lever side shaft 30 is inserted. As shown in FIG. 3, the insertion hole 29A is opened in the middle of the insertion hole 29A. Is formed with a notch 29B extending in the radial direction.

One end of the lever side shaft 30 is a small diameter portion 30A which is slidably inserted into an insertion hole 29A of the valve body side shaft 29. In the middle of the small diameter portion 30A, a cutout portion of the valve body side shaft 29 is provided. Engagement groove 30 corresponding to 29B
B (see FIG. 3) is formed. Further, the other end of the lever-side shaft 30 has an engagement end 2 of the operation lever 25.
A lever engagement hole 30C with which 5A engages is formed.

A valve spring 31 is disposed on the outer peripheral side of the valve shaft 28 between the valve body 24 and the nozzle body 21, and the valve spring 31 is arranged so that the valve body 24 is seated on the valve seat 26. That is, it is always urged in the direction of arrow A ', and is constituted by a coil spring.

A coil spring 32 is provided between the lever side shaft 30 and the valve shaft sliding hole 27, and the coil spring 32 is connected to the lever engagement hole 30 of the lever side shaft 30.
By making C always contact the engagement end 25A of the operation lever 25, rattling of the operation lever 25 is prevented.

Reference numeral 33 denotes an automatic valve closing mechanism for automatically closing the valve element 24 when the oil liquid supplied into a fuel tank (not shown) reaches a predetermined liquid level. 3
Numeral 3 denotes a valve element engaging / disengaging mechanism which is disposed in an opening 34 formed on the side surface of the nozzle body 21 and includes a diaphragm 36, a receiving plate 39, an engaging roller 40, a coil spring 41, and the like, which will be described later.
Five.

Numeral 36 denotes a diaphragm, 37 denotes a cap for fixing the peripheral edge of the diaphragm 36 and closing the opening 34, and the diaphragm 36 defines a negative pressure chamber 38 in the opening 34 as shown in FIG. Has formed. A receiving plate 39 is fixed to the center of the diaphragm 36.

Here, the receiving plate 39 is formed in a U-shape that opens toward the valve shaft 9, and a long hole (not shown) extending in the axial direction of the valve shaft 9 is formed in the opposite wall. The two engagement rollers 40 are slidably fitted in the elongated holes.
The engagement roller 40 engages and disengages the notch 29B of the valve body-side shaft 29 and the engagement groove 30B of the lever-side shaft 30 in accordance with the movement of the diaphragm 36.

Reference numeral 41 denotes a cap located in the negative pressure chamber 38.
The coil spring 41 is provided between the diaphragm 7 and the diaphragm 39.
Each of the engagement rollers 40 is biased so as to fit into the engagement groove 30 </ b> B of the lever-side shaft 30 via.

Reference numeral 42 denotes an air suction passage having one end opening to the tip end of the discharge pipe 22 and the other end opening to the negative pressure chamber 38. The air suction passage 42 has an air introduction pipe 43, as will be described later. It is composed of an air passage 44 and a negative pressure passage 45.

The air introduction pipe 43 is disposed in the discharge pipe 5, and one end of the air introduction pipe 43 becomes an intake port 43 A opened at the tip end of the discharge pipe 22, as shown in FIG.
The other end is open to one end of the ventilation passage 44 and the other end of the negative pressure passage 45.

The air passage 44 is formed on the side surface of the nozzle body 1, and one end of the air passage 44 is open to the other end of the atmosphere introduction pipe 43, and the other end is open to the negative pressure chamber 38.

A negative pressure passage 45 is formed in the valve seat 26. One end of the negative pressure passage 45 is opened from the valve seat 26 to the flow path 20,
The other end is open to the ventilation path 44. Here, a negative pressure is generated in the negative pressure passage 45 due to the flow of the oil liquid flowing through the flow path 20 (Venturi action).

By adopting a pipe structure such as the above-described air introduction pipe 43, the ventilation path 44, and the negative pressure passage 45, for example, when the air introduction pipe 43 is not closed, Air is sucked into the passage 20, but new air is sucked from one end of the atmosphere introduction pipe 43, and the inside of the passage and the inside of the negative pressure chamber 38 are maintained at the atmospheric pressure. When the atmosphere introduction pipe 31 is closed, the air in the negative pressure chamber 38 is sucked into the flow path 20 from the ventilation path 32 together with the air in the passage, and the inside of the negative pressure chamber 38 is in a negative pressure state.

The configuration of the fueling nozzle 8 described above is the same as the configuration of a fueling nozzle having a known automatic valve closing mechanism, and the features that characterize the present invention will be sequentially described below.

As shown in FIG. 3, a pressure sensor 50 is buried in the cap 37 and detects the pressure in the negative pressure chamber 34.

As shown in FIG. 1, a pressure sensor 51 for detecting the pressure in the oil supply pipe 6 is provided between the tip of the oil supply pipe 6 and the flow meter 5.
Is for detecting the pressure (primary pressure) of the oil liquid flowing into the flow path 20 of the oil supply nozzle 8.

An abnormality notification display 52 is disposed at the upper front of the device housing 2.
When deterioration of the operation of the valve body is detected by an abnormality detection program described later, an indication of the abnormality of the valve body operation is displayed to notify the refueling worker of the abnormality.

The above-described pump motor 9 and pulse oscillator 1
0, the nozzle switch 12, the refueling amount display 13, the pressure sensors 50 and 51, and the abnormality notification display 52,
The control device 53 is provided in the device housing 2 and is electrically connected to a control device 53 that controls the refueling device 1.
An abnormality detection program described later and parameter values such as a predetermined time T1 used in the program are stored, and control for the refueling device 1 associated with refueling work and control for abnormality detection are performed.

Here, the pressure values detected by the pressure sensors 50, 51 are shown in FIG.
A description will be given based on the pressure transition diagram of FIG.

This pressure transition diagram shows the pressure values detected by the pressure sensors 50 and 51 immediately before the atmosphere introduction pipe 43 is closed due to the rise in the liquid level in the fuel tank, and the vertical axis indicates the pressure. The transition of the generated negative pressure detected by the pressure sensor 50 is indicated by a line A, and the transition of the primary pressure detected by the pressure sensor 51 is indicated by a line B, with the value and the horizontal axis representing time.

First, when the air introduction pipe 43 is not closed, the fuel is supplied into the fuel tank. Therefore, the air sucked from one end of the air introduction pipe 43 through the negative pressure passage 45 is supplied to the flow path 20. The pressure in the negative pressure chamber 38 detected by the pressure sensor 50 is close to zero, and the primary pressure detected by the pressure sensor 51 is also close to zero.

When the liquid level in the fuel tank rises and the air introduction pipe 3
1 is closed (state a), the air in the negative pressure chamber 38 is sucked from the ventilation path 32 and is
By being discharged inside, the inside of the negative pressure chamber 38 becomes a negative pressure state. The transition of the pressure detected by the pressure sensor 50 at this time falls at a steep angle. When the negative pressure value exceeds the urging force of the coil spring 41 (predetermined pressure value P1), the diaphragm 36 is displaced and the operating lever 2 is displaced.
5 is released, that is, the valve body engagement / disengagement mechanism 35
(Automatic valve closing mechanism) starts to operate (state b). Finally, the main valve 24 is seated on the valve seat 26 (state c) and the flow path 20
Is closed.

At the time of the transition from the state a to the state b, the pressure detected by the pressure sensor 50 drops at a steep angle due to the increase of the negative pressure. Does not change because is not closed.

At the time of the transition from the state b to the state c, the pressure detected by the pressure sensor 51 decreases as the flow of the oil in the flow path 20 decreases due to the closing of the main valve 24. To decrease, it goes up and down steeply. The pressure detected by the pressure sensor 51 is such that the flow path 20 is closed, but the oil liquid is continuously supplied from the pump 4, so that the pressure in the oil supply pipe 6 increases and rises rapidly. When the valve 20 is closed, that is, when the main valve 24 is completely seated on the valve seat 26, the pressure becomes constant (predetermined pressure value P2), the pressure stops rising, and does not change thereafter.

At this time, the time from the state b to the state c is the time ΔT during which the main valve 24 is moved (operated). If the state of the main valve 24 is deteriorated, the time ΔT is long.
This time ΔT does not change considerably from the beginning of installation,
It gradually increases with deterioration of seals and the like.

The control device 53 of the refueling device 1 measures the time ΔT as described above, and compares the measured time ΔT with a predetermined time T1 in a normal state, which is obtained in advance through experiments or the like, and deteriorates the operation of the valve body. An abnormality detection program for detecting the abnormality is stored. Next, the abnormality detection program will be described with reference to the flowchart of FIG. In FIG. 4, “step” is abbreviated as “S”. In the following description, “step” is abbreviated as “S”.

First, when the power supply of the refueling device 1 is turned on,
In S1, it is detected whether or not the refueling nozzle 8 is removed from the nozzle hook 11, that is, whether or not the nozzle switch 12 is turned on, and if it is turned on, the process proceeds to S2. It is in a refueling standby state.

In S2, the pump motor 9 is started to start oil supply and the pump 4 is driven to start supplying oil to the oil supply nozzle 8.

When the operation lever 25 of the refueling nozzle 8 is operated and the main valve 24 is opened, the oil liquid is discharged to the fuel tank, so that the flow meter 5 starts measuring the flow rate in S3, The integrated value of the flow rate is calculated based on the pulse signal output from the controller, and the integrated value is displayed on the refueling amount display 13.

In S 4, the output of the pressure sensor 50 determines whether or not the valve body engagement / disengagement mechanism 35 starts to operate, that is, the negative pressure value in the negative pressure chamber 38 exceeds a predetermined pressure value exceeding the urging force of the coil spring 41. It is detected whether or not P1 has been reached, and unless this is detected, the flow rate measurement in S3 is continuously performed.

Here, in the present embodiment, this S
The first detecting means for detecting the start of the operation of the automatic valve closing mechanism is constituted by the processing of No. 4 and the pressure sensor 50 and the control device 53.

At S4, when the negative pressure value in the negative pressure chamber 38 exceeds the urging force of the coil spring 41,
Then, the process goes to 5 to operate a timer provided in the control device 53 for measuring the time ΔT during which the main valve 24 moves (operates).

Next, the flow shifts to S6, this time for the pressure sensor 5
The output of 1 indicates whether or not the flow path 20 of the refueling nozzle 8 has been closed, that is, whether the primary pressure and the main valve 24 are completely
It is detected whether or not the predetermined pressure value P2 that is seated on the vehicle coincides with the predetermined pressure value. Unless this value is detected, the timer of the control device 53 continues to measure the time.

The processing in S6, the pressure sensor 51, and the control device 53 constitute a second detecting means for detecting blockage of the flow path by the automatic valve closing mechanism.

In S6, when the primary pressure has reached the predetermined pressure value P2, the flow goes to S7 to stop the timer of the control device 53, obtain the time ΔT for moving (operating) the main valve 24, and go to S8. Transition.

In S8, the time ΔT is compared with a predetermined time T1 when the valve body 24 is in a normal state. And the time Δ
If T is greater than the predetermined time T1, the process proceeds to S9, in which the abnormality notification display 52 indicates that the operation of the main valve has deteriorated, notifies the refueling operator, and proceeds to S10. If the time ΔT is equal to or shorter than the predetermined time T1 in S8, the process directly proceeds to S10.

In S10, it is detected whether or not the refueling nozzle 8 has been returned to the nozzle hook 11 and the refueling operation has been completed, based on whether or not the nozzle switch 12 has been turned off. If the nozzle is off, it is determined that the refueling operation has been completed and the refueling nozzle 8 has been returned to the nozzle holder 11,
In step 11, the pump motor 9 is deenergized and the fuel supply device 1 returns to the oil supply standby state. If the nozzle has not been turned off, it is assumed that additional fuel is to be supplied to the fuel tank, the flow is returned to the flow measurement state in S3, and the processing from S3 onward is performed again.

As described above, in the present embodiment,
The time ΔT is measured based on the detection results of the pressure sensors 50 and 51, and is compared with a predetermined time T1 in a normal state, which is obtained in advance by an experiment or the like, to detect the deterioration of the operation of the valve body 24, and the refueling work is performed. To inform the worker, the gas station worker
It is not necessary to judge the deterioration of the operation of No. 4, and it is possible to prevent the refueling work from becoming complicated. Further, it is possible to eliminate the trouble of routinely checking for deterioration of the operation of the valve body 24 at a service station where self-service refueling is performed.

In this embodiment, when the time ΔT is longer than the predetermined time T1, the control device 53 displays on the abnormality notification display 52 that the operation of the main valve is deteriorated, and refuels. Although the operator is notified, the pump motor 9 may be deenergized (shown by a broken line in FIG. 5). In this case, if the valve body engagement / disengagement mechanism 35
Even when the (automatic valve closing mechanism) does not operate, there is no possibility that the oil liquid leaks from the fuel tank of the vehicle during refueling.

Further, in the above embodiment, the pressure sensor 51 for detecting the primary pressure is provided between the tip side of the oil supply pipe 6 and the flow meter 5, but the present invention is not limited to this.
May be provided anywhere between the valve element 24 and the discharge port of the pump 4. For example, the element may be provided in the flow path 20 on the upstream side of the valve element 24 or in the oil supply hose 7.

In the above embodiment, the start of operation of the valve body engagement / disengagement mechanism 35 is detected based on the pressure in the negative pressure chamber 38. However, if the start of operation of the valve body engagement / disengagement mechanism 35 can be detected, the invention is not limited to this. Instead, the operation of the valve body engaging / disengaging mechanism 35 may be started by detecting the displacement of the diaphragm 36 or the displacement of the valve body 24, the valve shaft 28, or the valve spring 31 by using a microswitch or a displacement sensor.

In the above embodiment, the valve 2
4 is detected based on the pressure in the oil supply pipe 6. However, if the blockage of the flow path 20 can be detected, the present invention is not limited thereto, and the valve body 24, the valve shaft 28, or the valve spring 31 may be used.
And a pressure sensor is provided on the valve seat 26 so that the valve seat 26 of the valve body 24 is provided.
It may be configured to detect seating on the vehicle.

Next, a refueling device 6 according to a modification of the present invention will be described.
The zero control device 61 will be described based on the control flowchart of FIG. Note that the configuration of the refueling device 60 of the present modification is the same as the configuration of the refueling device 1 of the above-described embodiment, and therefore only control of the refueling device 60 performed by the control unit 61 that is different from that of the above-described embodiment will be described.

After the refueling operation by the refueling device 60 is started and the flow rate measurement is started (S1 to S3), in S21, the output of the pressure sensor 50 is used to control the valve body engaging / disengaging mechanism 35.
Is started, that is, whether the negative pressure value in the negative pressure chamber 38 has reached a predetermined pressure value P1 exceeding the urging force of the coil spring 41, and unless this is detected, the flow rate measurement in S3 is performed. to continue. The processing of S21 and the control device 6
1 constitutes a negative pressure determination means.

When the negative pressure value in the negative pressure chamber 38 has reached the predetermined pressure value P1 in S21, the process proceeds to S22, in which the control device 62 for measuring whether or not a predetermined time T1 in the normal state has elapsed. The timer provided in is operated.

Next, the program proceeds to S23, in which the output of the pressure sensor 51 determines whether or not the flow path 20 of the refueling nozzle 8 has been closed, that is, whether the primary pressure and the main valve 24 are completely closed.
It is detected whether or not the predetermined pressure value P2 seated on the seat 6 coincides with the predetermined pressure value P2. If this is not detected, the process proceeds to S24. The processing in S23 and the control device 61 constitute a primary pressure determining means.

In S24, it is determined whether or not the time of the timer operated in S22 has exceeded a predetermined time T1, and if not, the flow returns to S23.

In S23, the primary pressure is set to the predetermined pressure value P2
When it is determined that the operation of the main valve 24 has not deteriorated, the process shifts to S25, and in S25, the nozzle switch 12 is turned off to determine whether or not the refueling nozzle 8 is hooked back on the nozzle hook 11 and the refueling work is completed. It is detected depending on whether or not it has become.

If the nozzle is off, it is determined that the refueling operation has been completed and the refueling nozzle 8 has been returned to the nozzle hook 11, and the process proceeds to S26, where the pump motor 9 is deenergized and the refueling device 1 is set in a refueling standby state. Return to the state. If the nozzle has not been turned off, it is assumed that additional fuel is to be supplied to the fuel tank, and the flow returns to the flow measurement state in S3, and the processing of S3 is performed.

In S24, when the timer time has exceeded the predetermined time T1, it is determined that the primary pressure has not reached the predetermined pressure value P2 within the predetermined time T1, and that the operation of the main valve 24 has deteriorated. Then, the process proceeds to S27 and the abnormality notification display 52
Is displayed to notify the refueling operator that the operation of the main valve 24 has deteriorated, and the process proceeds to S28.

In S28, the pump motor 9 is deenergized.
This is because if the valve body engaging and disengaging mechanism 35 does not operate, the oil liquid continues to be discharged from the fueling nozzle 8 even though the fuel tank of the vehicle is full, and the oil from the fuel tank continues to be discharged. Since the liquid is sent, refueling is stopped to prevent such a situation.

At S29, the refueling nozzle 8 is
It is detected whether or not the nozzle switch 12 has been turned off by returning to 1 and completing the refueling operation. If the nozzle is off, it is assumed that the refueling operation has been completed and the refueling nozzle 8 has been returned to the nozzle holder 11,
To the refueling standby state.

As described above, in this modification, after the pressure sensor 50 detects the predetermined pressure value P1, the pressure sensor 51 detects whether or not the pressure sensor 51 detects the predetermined pressure value P2 within a predetermined time T1 in a normal state. That is, a comparison is made as to whether the time from detection of the predetermined pressure value P1 to detection of the predetermined pressure value P2 is equal to or shorter than a predetermined time T1. As a result, the deterioration of the operation of the valve body 24 is detected, the refueling worker is notified, and the pump motor 9 is deenergized.
There is no need for the service station worker to judge the deterioration of the operation of the valve element 24, and it is possible to prevent the refueling operation from becoming complicated. Also,
At the gas station that carries out self-service refueling, the valve 2
It is possible to eliminate the trouble of routinely checking the deterioration of the operation of No. 4 and, even if the valve body engagement / disengagement mechanism 35 does not operate, there is no possibility that the oil liquid leaks from the fuel tank of the vehicle during refueling. .

[0076]

As described in detail above, according to the first aspect of the present invention, the operating time measuring means detects the operation start pressure of the automatic valve closing mechanism by the negative pressure measuring means and then closes the flow passage. The time until detection by the primary pressure measuring means is measured. And
When the measured time is longer than the predetermined time stored in the operating time storage means, the control means notifies the operator that the operation of the valve element has deteriorated. There is no need for a member to make a judgment, and it is possible to prevent the refueling operation from becoming complicated. In addition, in a refueling station that performs self-service refueling, it is possible to eliminate the trouble of checking for deterioration of the valve body operation of the refueling nozzle.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a fueling device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a refueling nozzle.

FIG. 3 is a cross-sectional view of a refueling nozzle.

FIG. 4 is a pressure transition diagram of a primary pressure and a generated negative pressure.

FIG. 5 is a control flowchart of the fuel supply device according to the embodiment of the present invention.

FIG. 6 is a control flowchart of a refueling device according to a modification of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Oil supply device 4 Pump (liquid supply means) 8 Oil supply nozzle 20 Flow path 35 Valve body disengagement mechanism (automatic closing mechanism) 50 Pressure sensor (negative pressure measurement means) 51 Pressure sensor (primary pressure measurement means) 52 Error notification display Device 53 control device (operating time storage means, operating time measuring means, control means)

Claims (1)

[Claims] 1. An oil supply device having an automatic valve closing mechanism that closes a flow path by a negative pressure, a first detection unit that detects an operation start of the automatic valve closing mechanism, and the flow path by the automatic valve closing mechanism. Second to detect blockage
Detecting means for operating the automatic valve closing mechanism, and operating time storage means for storing the operating time of the automatic valve closing mechanism in advance; and closing the flow path after the first detecting means detects the start of operation of the automatic valve closing mechanism. Operating time measuring means for measuring a time until is detected by the second detecting means, and comparing the time measured by the operating time measuring means with the time stored in the operating time storing means, Control means for issuing a notification when the time is longer than the stored time.