JPH0517119B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a refueling device for moving and delivering liquid fuel such as kerosene by placing it on the loading platform of an automobile, and in particular, it is used to check for leakage, etc. This invention relates to a device that has been improved so that it can be easily performed.

[Background of the Invention] Conventionally, in a mobile oil supply device as described above, there is a possibility that the influence of vibration during movement may cause loosening of the pipe connecting portion or malfunction of the valve device. Additionally, depending on the delivery destination, it is necessary to install a long refueling hose, such as 10 m or 20 m, and extend the refueling nozzle to any desired position, and there is a risk that the hose may break or crack, causing liquid leakage. Therefore,
This type of equipment needs to be inspected regularly to detect leaks and malfunctions early and to prevent serious problems such as fires, but it takes a long time to thoroughly inspect each pipe. However, this resulted in a burden on users and service personnel.

On the other hand, as seen in Japanese Utility Model Application Laid-Open No. 60-2698, there is known a refueling device in which a pump is driven for a short period of time to detect liquid leakage before refueling is started. However, with such conventional equipment,
Since liquid leak detection is performed in conjunction with the refueling operation, detailed inspection functions cannot be provided, and even if it is known that there is a liquid leak, it is not possible to estimate where the liquid leak has occurred, and it is difficult to quickly investigate the problem. There was a defect that could not be repaired.

[Structure of the invention] This invention has been made to address these problems,
A tank that stores liquid fuel such as kerosene, a pump that feeds the fuel in the tank, a valve device installed in the oil supply path that connects to the pump discharge side, and a nozzle valve at the tip that forms the downstream oil supply path. In a refueling device for delivering fuel by being placed on a loading platform of an automobile, the refueling hose is equipped with a refueling nozzle for refueling. , a means for selecting any of the inspection items that can be performed in the inspection work mode; and a first inspection operation for opening the valve device and driving the pump in a timed manner according to the inspection item selected by the selection means. , a control means for at least performing a second inspection operation in which the valve device is closed and the pump is timed driven; and a metering means provided in the oil supply path upstream of the valve means and measuring the flow rate of fuel accompanying each of the inspection operations. , and a display means for displaying the flow rate given by the measuring means, which has been improved so that the oil supply system can be inspected.

[Operation] Accordingly, by performing the first and second inspection operations in the inspection work mode, the following points can be confirmed. Note that when the first inspection operation is performed, even when the nozzle valve of the refueling nozzle is closed, the refueling hose expands due to the pump pressure, and a liquid flow is generated in an amount approximately proportional to the length of the hose.

a. Perform the first inspection operation with the nozzle valve of the refueling nozzle closed, and if more leakage is observed than the normally observed leakage due to expansion of the refueling hose, it can be determined that there is a liquid leak, and in this case, a second inspection is also performed. If there is no outflow and no liquid leakage is observed during operation, it is determined that there is a liquid leakage in the oil supply path downstream of the valve device.

b Furthermore, if liquid leakage is found in both the first and second inspection operations, it can be determined that there is a liquid leakage on the upstream side of the valve device.

c Furthermore, even though no fluid leakage is detected in the first inspection operation, if a leak due to expansion of the refueling hose that occurs in the first inspection operation is also observed in the second inspection operation, the valve device must be closed. It can be seen that the liquid is not completely flowing and the liquid is flowing towards the refueling hose side.

[Example] Specific examples thereof will be explained below based on the drawings.

1 is a car, 2 is an oil tank placed on the loading platform 3 of the car 1, and 4 is a fueling device main body installed in parallel with the oil tank. A metered amount of oil is supplied to a container 7 to be supplied with oil through a refueling nozzle 6 .

The oil supply device body 4 includes a pump 8 that pumps oil from the tank 2, a drive circuit 18 for the pump 8, a flow meter 9 that measures the amount of oil supplied, and a transmitter that outputs a flow signal every time the flow meter 9 measures a constant flow rate. Vessel 1
0. A control valve 11 that faces the oil supply path and adjusts the oil supply flow rate by adjusting its opening degree; A valve driving means 12 that includes a motor and the like and drives the control valve 11; ON-OFF operation by the opening/closing linkage of the control valve 11; Valve opening/closing detection means 1 consisting of an operated micro switch etc.
3, and a control section 14 that sends and receives signals to and from each of the above sections and controls the refueling operation.

In the control unit 14, there is an operation board 15 that performs operations such as power ON/OFF, preset input, amount input, etc., and a display 16 that displays the amount of refueling, preset amount, amount, etc., and a control that provides control operations in accordance with the program. board 17. This control board 17 consists of a microcomputer equipped with a CPU, a system controller, a clock generator, a ROM, a RAM, and an input/output device, and operates according to a program registered in the ROM.

FIG. 3 is an enlarged view of the operation board 15, which includes a power switch 20, an operation switch 21 that starts and stops refueling, and a mode switch 2 that selects and sets the refueling mode and the display mode on the display 16.
2. It is equipped with a set key 23 for setting the preset amount, amount, etc. When the power is turned on at the power switch 20 and the operation switch 21 is turned on, the pump 8 is driven and the control valve 11 is opened to enter the oil supply standby state. In this state, refueling nozzle 6
Refueling is started by opening the nozzle valve, but the refueling that is performed in this way is performed by switching the mode switch 2 at the time when the operation switch 21 is turned on.
This is done in the setting mode in 2. The mode switch 22 allows the following modes (a) to (g) to be selected.

(b) Normal lubrication: A lubrication mode that starts when the nozzle valve of the lubrication nozzle 6 opens and stops lubrication when the nozzle valve closes.

(b) Preset lubrication: Starts when the nozzle valve is opened, and the control valve 11 adjusts the lubrication amount to the preset amount preset with the set key 23.
Refueling mode that automatically stops refueling.

(c) Integer value lubrication: Starts when the nozzle valve is opened, and then targets an integer value between 1 and less than 2 than the amount of lubrication when the nozzle valve is closed.
A lubrication mode in which lubrication is automatically stopped by the control valve 11 when the nozzle valve is restarted.

(c) Amount set lubrication: A lubrication mode that is started by opening the nozzle valve and automatically stops lubrication by the control valve 11 when the amount of lubrication corresponds to the amount set in the set key 23.

(e) Amount calculation: A mode in which the measured fuel amount displayed on the display 16 is multiplied by a pre-registered unit price (yen/) and the result is displayed on the display 16.

(f) Unit price registration: A mode in which the refueling unit price (yen/) is set using the set key 23 and registered in the storage means of the control unit 14.

(g) Inspection: Execute multiple inspection operations set according to the respective conditions such as the open/close state and time of the control valve 11 according to the specifications in the set key 23, and check the necessary flow rate, time, etc. related to the execution. A mode in which data is displayed on the display 16.

Setting operations using the set keys 23 are performed by pressing the corresponding keys a necessary number of times.

The inspection operations executed in the inspection mode (G) set by the mode switch 22 include the following.

CK1: The control valve 11 is opened and the pump 8 is driven into a standby state, and the flow rate generated during a certain period of time _T1 is displayed on the display 16.

CK2: Close the control valve 12 and drive the pump 8,
The flow rate generated during a certain period of time _T2 is displayed on the display 16.

CK3: The control valve 11 is opened and the pump 8 is driven into a standby state, and the flow rate is measured and displayed on the display 16 for a certain period of time _T3 when the nozzle valve is opened and the oil supply state is entered.

CK4: Open and close the control valve 11, and display the time t required for opening and closing the valve on the display 16.

Therefore, various inspections can be performed based on the data given to the display 16 in each of the above operations CK1 to CK4. That is, if the flow rate given at CK1 is larger than the reference value, there is a suspicion that there is a liquid leak in the nozzle valve or the pipe line including the hose 5. If the flow rate given at CK2 is greater than the reference value,
There is a suspicion that there is a liquid leak in the control valve 11 or in the pipe line before the control valve 11. If the flow rate given by CK3 is below the standard value, there is a possibility that the pump capacity has decreased or the valves and pipes are clogged with debris.
If the time t given in CK4 exceeds the reference value, there is a suspicion that the control valve 11 is malfunctioning.

FIG. 4 is a flowchart showing a part of the program registered in the ROM in the control board 17, mainly showing the program operation in the inspection mode.

After setting the inspection mode using the mode switch 22 and inputting inspection items CK1 to CK4 using the numbers 1 to 4 using the set key 23, operation in the inspection mode is started by pressing the operation switch 21. When the operation switch 21 is pressed, the operation starts (1), and when it recognizes that the inspection item entered with the set key 23 is CK1 (2), the valve drive means 12 outputs a drive command to start the control valve 11. The valve is opened (3), and when the valve opening is detected by the signal from the valve opening/closing detection means 13 (4), the pump 8 is turned on, a timer is set for a certain period of time _T1 , and the display on the display 16 is cleared to 0. Set to flow rate display state (5). When the internal timer detects the passage of _T1 (6), the pump 8 is turned off, the control valve 11 is closed, and an alarm is output to notify the end of the operation (7).

On the other hand, when you realize that the inspection item is CK2
(8) The control valve 11 is closed via the valve driving means 12 (9), and when the valve opening/closing detection means 13 confirms the valve closing (10), the pump 8 is turned on and a timer is set for a certain period of time _T2. At the same time, the display 16 is cleared to 0 to display the flow rate (11). After this, when the timer detects the passage of _T2 (12), the pump 8 is turned off and an alarm indicating the end of operation is output.

When it is recognized that the inspection item is CK3 (14), the control valve 11 is opened, the pump 8 is turned on, and a timer is set for a certain period of time _T4 (15). When the opening of the control valve 11 and the progress of _T4 are confirmed (16) and (17), an alarm is output to notify that inspection preparation is OK (18). The timer time _T4 set here is the time required for the pump 8 to enter steady operation. When the start of refueling by nozzle valve operation is detected by the flow rate signal from the flow rate transmitter 10, a timer is set for a certain period of time _T3 (20), and after _T3 has elapsed (21), the measured flow rate is set in a certain unit (/minute). ) is converted and displayed (22), and an alarm indicating the end of operation is output at the same time as pump 8 is turned off (23).

When recognizing that the inspection item is CK4 (24),
The control valve 11 is closed (25), and when the closure is confirmed (26), the control valve 11 is then opened and at the same time a time count is started based on the internal clock (27). When the valve opening/closing detection means 13 detects opening (28), the time count is stopped and the counted time t ₀ is displayed. After this, when there is a start input from the operation switch 21 (30),
The control valve 11 is closed, a time count is started (31), and when the valve is detected to be closed (32), the time count is stopped, the counted time tc is displayed, and an alarm indicating the end of the operation is output. (33).
If the inspection item specified by the set key 23 does not correspond to any of CK1 to CK4, an alarm is output to request re-designation (34).

According to the embodiment having the above configuration, when the inspection mode is set with the mode switch 22 and the inspection item is selected with the set key 23 to start operation, the control valve 11 is opened and closed under conditions according to the inspection item. At the same time, the pump 8 can be driven for a limited time to perform an inspection operation. The flow rate generated during this inspection operation is displayed on the display 16, and if this displayed flow rate is evaluated separately using a manual, etc., it is possible to identify the presence or absence of liquid leakage in the pipeline, the location of the liquid leakage, malfunction of the valve device, etc. can do.

That is, if a larger amount than usual is detected in the first inspection operation CK1, it can be determined that there is a liquid leak, and if no liquid leakage is detected in the second inspection operation CK2, the oil supply hose 5 downstream of the control valve 11 It can be seen that there is a liquid leak in the oil supply nozzle 6. Further, if liquid leakage is found in both the first and second inspection operations CK1 and CK2, it is known that there is a liquid leakage on the upstream side of the control valve 11. Furthermore, the first inspection operation
If liquid leakage is detected in the second inspection operation CK2 even though no liquid leakage is detected in CK1, it can be seen that the control valve 11 is not completely closed and leakage has occurred.

In addition to displaying the flow rate that occurred during inspection operation, it is also possible to configure the system to compare the flow rate with a reference value and notify the presence or absence of abnormalities such as liquid leakage. In the delivery refueling equipment,
The length of the oil supply path varies depending on the device, such as when an extension hose is used, and the reference value is not constant. In this case, a means for inputting the length of the oil supply path and setting the reference value is required.

[Effects of the Invention] The present invention is configured as described above, and can prevent liquid leakage by performing the first and second inspection movements in the inspection work mode without actually inspecting the pipe line of the device. It is possible to identify not only the presence or absence of liquid leaks, but also the location of liquid leaks, and even if a liquid leak occurs, it can be quickly repaired. Further, in addition to liquid leakage, it is possible to detect valve closing failures of the valve device by executing the first and second inspection operations, and detailed inspections can be performed with simple operations. Furthermore, the amount of leakage caused by inspection is displayed on the display means, and the amount of fluid leaked due to leakage can be easily grasped, which is useful when estimating the location and cause of the leakage based on the degree of leakage. be able to.

[Brief explanation of the drawing]

FIG. 1 is an external view showing an embodiment of the present invention. FIG. 2 is an explanatory diagram of the configuration of the embodiment. FIG. 3 is an enlarged view of the main parts of the embodiment. FIG. 4 is a flowchart showing the main part of the program of the embodiment. 4 is the oil supply device main body, 6 is the oil supply nozzle, 8 is the pump, 9 is the flow meter, 11 is the control valve which is the valve device, 16
17 is a control board, 15 is an operation board, 22 is a mode switch, and 23 is a set key.

Claims (1)

[Claims] 1 A tank for storing liquid fuel such as kerosene, a pump for feeding the fuel in the tank, a valve device installed in the oil supply path connected to the pump discharge side, and a downstream oil supply path formed with a nozzle valve at the tip. In a refueling device for distributing fuel by being placed on the loading platform of a car, the refueling device is equipped with a refueling hose provided with a refueling nozzle,
mode setting means capable of selecting and setting a mode for performing inspection work in addition to refueling work; means for selecting any of the inspection items executable in the inspection work mode; and inspection items selected by the selection means. a control means for at least providing a first inspection operation in which the valve device is opened and the pump is driven for a timed period, and a second inspection operation in which the valve device is closed and the pump is driven for a timed period according to the timing; and an oil supply upstream of the valve device. 1. A refueling device comprising: a metering device installed on a roadway for measuring the flow rate of fuel accompanying each of the inspection operations; and a display device displaying the flow rate provided by the metering device.