JPH0764389B2 - Refueling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of an oil supply device.

[Prior Art] In a refueling device, as shown in FIG.
MPD (Multi-Prod) which is provided with a plurality of refueling systems (four systems A to D in this figure)
There is a uctive Dispenser) type weighing machine 20. In this type of weighing machine, there is a weighing machine in which a plurality of systems of oil supply pumps and flow meters, or a plurality of systems of indicators are shared.

For example, the refueling device shown in FIG. 1 (although this figure shows the configuration of the embodiment) has a refueling pump and a flow meter for the refueling system of the A system and the B system of the weighing machine shown in FIG. Is shared. Further, the refueling apparatus shown in FIG. 6 (this figure also shows the configuration of the embodiment) uses the indicators of the A system and C system refueling system of the weighing machine in FIG. 8 in common.

In the refueling apparatus shown in these drawings, it is necessary to prohibit the refueling of the B system or the C system while the A system is refueling, and to prohibit the refueling of the A system when the B system or the C system is refueling. This is because it is impossible to detect the flow rate of two systems or to count and display the amount of refueling of two systems simultaneously and independently.

[Problems to be Solved by the Invention] By the way, the above-described conventional oil supply device has the following problems.

For example, during refueling of system A, it is not possible to refuel even if the nozzles of system B or system C are removed. Therefore, the B system or C
The lever of the nozzle of the system may be opened to open the valve provided on the nozzle, and the valve may be returned to the nozzle hook in that state. However, in this state, when refueling of the A system is completed, the refueling system of B or C may be in a state where refueling is permitted by removing the nozzle from the nozzle hook. Therefore, in the next refueling, B system or C system
If the nozzle of the system is removed from the nozzle hook first, the valve of the nozzle is already open, so before the nozzle is inserted into the oil supply port, refueling will be started and the oil will be scattered. There is a risk.

The present invention has been made against such a background, and while refueling in one system, even if the nozzle of the other system is removed and the valve of the nozzle is opened and returned to the nozzle hook, An object of the present invention is to provide an oil supply device in which the inconvenience of spattering oil does not occur when it is removed from the nozzle hook.

[Means for Solving Problems] In order to solve the above problems, the present invention has a plurality of refueling systems each including a refueling hose and a refueling nozzle, and uses a common indicator or pump for the plurality of refueling systems. In addition, each of the refueling systems is provided with nozzle operation detection means for generating a signal according to the start and end of the refueling operation by the refueling nozzle, and based on the refueling operation start signal output by each of the nozzle operation detection means. In a refueling device equipped with a refueling control means for selectively permitting refueling by one refueling system and disabling simultaneous refueling by a plurality of refueling systems, refueling by a nozzle operation detection means of one permitted refueling system After the operation start signal is output and before the refueling operation end signal is output, the refueling operation start signal is output by the nozzle operation detection means of another refueling system. Is provided, and storage means is provided to store that there was a trial of simultaneous refueling by the other refueling system, and after the end signal of the refueling operation by the nozzle operation detecting means of one permitted refueling system is output, With respect to another refueling system stored in the storage means, an inspection means for inspecting whether or not the valve of the oil supply nozzle is opened is provided, and the valve of the oil supply nozzle is opened by the inspection means. When it is detected, a refueling prohibition means for prohibiting refueling of the other refueling system by the refueling control means is provided even when a refueling operation start signal is output from the nozzle operation detection means of the other refueling system. It is characterized by being done.

[Operation] According to the above configuration, when the nozzle of the other system is once removed during refueling of one system, the valve opening detection of this nozzle is performed. And, when this lever is open, the oil supply of this system is prohibited. Therefore, even if the nozzle returned to the nozzle hook is removed while the lever is still open, it is possible to prevent the inconvenience that the oil is scattered.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention. In this embodiment, as described above, the pump and the flow meter are shared. In the figure, the motor 1
The oil pumped from the underground tank (not shown) by the pump 2 driven by
It is branched by the pipe line 4, and the nozzle 6 is passed through the control valves 5A and 5B.
Supplied to A and 6B. When not in use, these nozzles 6A and 6B are hooked on the nozzle hooks provided on the main body of the oil supply device, and at this time, the nozzle switches provided on the nozzle hooks.
7A and 7B are turned off.

The flowmeter 3 is provided with a transmitter 8 that emits a number of pulses proportional to the detected flow rate, and the pulses are sent to the controller 9. The controller 9 always recognizes the system being refueled. That is, of the switches 7A and 7B, the one that is turned on first, that is, the system corresponding to the switch that the nozzle is first removed is stored as the system being refueled, and the control valve 5A of this system is stored. Or open 5B. Also, the flow rate pulses of the system being refueled are counted to calculate the amount of refueling, and this is displayed on the indicator 11α or 11 of the system being refueled.
Display β.

Next, FIG. 2 is for explaining the types and functions of the flags provided in the storage area of the controller 9. In the following description, the letter X is replaced with A or B, and when X = A, it indicates the A system flag, and when X = B, it indicates the B system flag.

The corresponding change flag FLGN (X) shown in FIG. 9A is a 2-bit flag, and indicates a change in the nozzle switches 7A and 7B. The nozzle switches 7A and 7B are turned off when the nozzles 6A and 6B are hooked on the nozzles and turned on when they are removed. Then, this on / off is checked at a predetermined cycle (the details will be described later), and the previous on / off state and the current on / off state are recorded with 1 bit each. For example, the flag FLGN (A) is "01" when the nozzle switch A is turned off last time and turned on this time.
Becomes Conversely, when it changes from ON to OFF, "01"
And becomes "11" when the ON state is continued, and "00" when the OFF state is continued. flag
FLGN (B) also records the same for nozzle switch 7B.

The refueling prohibition flag FLGS (X) in FIG. 2B is turned on when the refueling from the nozzle 6A or 6B is prohibited and turned off when the prohibition is released by the valve opening detection described later.
It is a bit flag.

The refueling flag FLGM (X) in FIG. 7C is a 1-bit flag that is turned on when the system is refueling and turned off when the system is not refueling. Here, whether or not the fuel is being supplied corresponds to ON / OFF of the pump 2.

The valve opening detection flag FLGK (X) in FIG. 9D is a 1-bit flag that is turned on when valve opening detection is necessary and turned off when it is unnecessary.

Next, the operation of the first embodiment will be described with reference to the flowcharts of FIGS. 3 and 4 and the time chart of FIG.

The flowchart of FIG. 3 shows a process of detecting the states of the nozzle switches 7A and 7B. This program is started by a timer at a predetermined cycle. When activated, first, the state of the nozzle switch 7A is read in step S1. Then, it is compared with the previous read status (step
S2), the correspondence change flag FLGN (A) is set (step S3). For example, when the nozzle 6A is removed from the nozzle hook and the nozzle switch 7A changes from OFF to ON between the previous reading and the current reading, "01" is set.

Further, in steps S4 to S6, the same process is performed for the nozzle switch 7B, and the corresponding change flag FLGN (B).
Is set. In this way, the state of the nozzle switches 7A, 7B is constantly checked at a predetermined cycle, and the corresponding change flag F
It is stored in LGN (X).

Next, the flowchart of FIG. 4 shows the refueling control process. This program is also started by a timer at a constant cycle. However, the controller 9
When this program is run for the own system X (for example, system A), then this program is run alternately for the other system (for example, system B), and so on. . Then, when traveling with respect to the other system, a process in which X and X in the above flowchart are exchanged is executed.

This program is roughly divided into the following four processes.

(1) Processing when own system X enters refueling and other system does nothing during this refueling (2) Processing when own system X is refueling and nozzle is removed and returned to other system 3) Release processing when an alarm is output due to the detection of valve opening of the nozzle 6 of the other system (4) Processing when the nozzle is removed in the other system during refueling of own system X and left as it is , These are explained item by item.

(1) Process in which own system X enters refueling and other system does nothing during refueling This process is divided into a starting process, a refueling process, and an ending process.

Startup Process (Steps S11 to S21) This is a process of checking the corresponding change flag FLGN (X) and starting refueling when refueling is possible.

In steps S11 to S13 of FIG. 4, flag FLGN (X)
Is checked. Then, the flag FLGN (X) is "01".
, That is, when the nozzle 6X is removed from the nozzle hook and the nozzle switch 7X is turned on, step S1
The procedure proceeds from step 2 to step S14, and the refueling prohibition flag FLGN of the own system
(X) is read, and "1" / "0" is determined in step S15.

When the refueling prohibition flag FLGS (X) is "1", that is, when refueling of the own system is prohibited, the process is terminated as it is, and refueling is not performed.

On the other hand, when the refueling prohibition flag FLGS (X) is "0", that is, in the normal case where the refueling of the own system is not prohibited, the refueling flag FLGM () of the other system is read (step S16) and the "1" is returned.
/ Check "0" (step S17).

When the other system refueling flag FLGM () is "0", that is, when the other system is not refueling, the self system refueling is possible. Therefore, the controller 9 resets the refueling counter and the indicator 11X (X = α or β) (step S1).
9), the motor 1 of the pump 2 is turned on and the control valve 5X of its own system is opened (step S20). Further, the refueling flag FLGM (X) of the own system is set to "1" (step S21), and the process is temporarily terminated.

In this state, when the operator opens the lever of the nozzle 6X, refueling is started.

Processing during refueling (steps S13, S31 to 33) During refueling, the refueling flag FLGM (X) of the own system is "1" and the corresponding change flag FLGN (X) is "11". Therefore, the control of the controller 9 shifts from step S13 to step S31. In step S31, the refueling flag FLGM (X)
Is read out, and its "1" / "0" is checked in step S32. Then, the refueling flag FLGM (X) is "0", that is, it is determined that refueling of the own system is prohibited in step S15 of the start-up process described above, or it is determined in step S17 that another system is refueling, and step S21 When the pump 2 is stopped due to the inability to refuel the own system, the refueling control process is once ended.

On the other hand, the refueling flag FLGM (X) is "1", that is, the pump 2
Is operating, the controller 9 counts the flow rate pulses sent from the transmitter 8 of the flow meter 3 to measure the flow rate K and displays the refueling of its own system on the display 11X (step S33). ). After that, during refueling, this process is repeated each time the timer is started.

Completion Processing (Steps S41 to 47) When refueling is completed, the nozzle 6X of the own system is hung on the nozzles, so that the corresponding change flag FLGN (X) changes to “10”. Therefore, the controller 9 moves from step S13 to step S41. In step S41, the control valve of the own system
Close 5X, and in the next step S42, the flag FLGM of own system refueling
(X) is read out, and in step S43, "1" / "0" is checked.

If the refueling flag FLGM (X) is "1" now, step S4
From 3 to step S44, the pump 2 is turned off (step S44), and the refueling flag FLGM (X) is reset (step S45). Next, the valve opening detection flag FLGK of the other system
() Is read (step S46), and "1" / "0" is checked (step S47).

Nothing was done in the other system In this case, the corresponding change flag FLGN () of the other system is in the state of "00". Therefore, in the other system, only the process of step S11 is performed, and the valve opening detection flag FLGK () maintains the "0" state, so the valve opening detection is not performed.

(2) Processing when the nozzle 6 of the other system is removed and returned while the own system X is refueling This processing is performed at the time when the nozzle 6 of the other system is removed and at the end of refueling of the own system. It is divided into a valve opening detection process.

Processing at the time when the nozzle 6 of the other system is removed (steps S11 to 18) In this case, the corresponding change flag FLGN () of the other system becomes "01". This change is after removing the nozzle 6 of the other system,
It is detected by the program running of the other system that is executed first. That is, the program running is performed by substituting for X in FIG. 4, and the above change is detected in step S12.

At this time, the refueling prohibition flag FLGS () is "0", so the process proceeds through steps S14 and S15 to step S16, where X
The system refueling flag FLGM (X) is read. In the present case where the X system is refueling, the refueling flag FLGM (X) is "1".
Then, the process proceeds to step S18, and the system valve opening detection flag FLGK
() Is set to "1".

Valve Opening Detection Processing for Other Systems (Steps S61 to 69) When refueling of the own system ends, as described above, Step S4
In 7, the valve open detection flag FLGK () of the other system is "1" /
"0" is checked. In the present case where the nozzle 6 of the other system is once removed, since it is "1", the process proceeds to the valve opening detection of the other system.

First, a weighing counter (not shown) is reset (step S6
1) Open the control valve 5 of the other system (step S62). Next, the motor 1 is intermittently driven to perform inching, and the flow rate K at this time is measured by the flow rate pulse from the transmitter 8 of the flow meter 3 (step S63). Then, the control valve 5 of the other system is closed (step S64), and the flow rate K is set to the set flow rate K.
It is checked whether it is 0 or less (step S65).

When the flow rate K is less than or equal to the set flow rate K0, that is, the nozzle 6 of the other system
If is closed, refueling prohibition flag FLGS of other system
() Is set to "0", the refueling prohibition is released (step S66), and the valve opening detection flag FLGK () of the other system is set to "0".
Then, it is stored that there is no need to detect the valve opening (step S67), and the process ends.

On the other hand, when the flow rate K is larger than the set flow rate K0, it is determined that the nozzle 6 of the other system is open, and the refueling prohibition flag FLGS
() Is set to "1" to prohibit refueling of other systems (step S68), and a valve opening warning is output (step S69).

In this way, when the nozzle 6 of the other system is removed and returned during refueling of the own system, valve opening detection of the nozzle 6 of the other system is executed at the end of refueling of the own system, and when the valve is open. , Prohibit refueling and give an alarm.

(3) Process for canceling the alarm (steps S71 to 79) When the above alarm is issued, once the nozzle 6 of the other system is removed from the nozzle hook and then returned to the nozzle hook, the alarm is canceled by the following processing. To be done. It should be noted that this processing is also executed by the program in which X and X are interchanged in the flowchart of FIG. First, when the nozzle 6 is removed, the correspondence change flag FLGN () becomes "01", and the process proceeds from step S12 to step S14. Here, since the refueling prohibition flag FLGS () is "1", the process is temporarily terminated.

Next, when the nozzle 6 is returned, the correspondence change flag FLGN ()
Changes to “10”, the process proceeds from step S13 to step S41, and the control valve 5 is closed. In addition, a refueling flag FLGM
() Is read and checked (steps S42,4
3). In this case, since this is "0", the process proceeds to step S48, and the X system refueling flag FLGM (X) is read and checked (steps S48, 49). Since this is also "0", the valve opening detection flag FLGK () is read and checked (steps S50, 51).

Since the valve opening detection flag FLGK () is "1", the valve opening detection of the nozzle 6 is executed in steps S71 to S79. This valve opening detection is performed in steps S61 to S6 described above.
Since it is similar to the valve opening detection of 9, the explanation is omitted.

In this way, the valve opening detection of the system is performed, and when the valve of the nozzle 6 is closed, the refueling prohibition flag FLGS () is released and refueling becomes possible. When this valve is open, an alarm is output again, prompting the valve to close.

(4) While the system is refueling, remove the nozzle 6 of the other system,
Processing when left as it is The processing in this case is similar to the above (2), and when the valve of the nozzle 6 is open, refueling is prohibited and a valve open alarm is output.

Here, when the worker closes the valve of the nozzle 6 and returns it to the nozzle hook, the alarm is released in the same manner as the above (3),
Refueling is permitted.

In the above description, it is assumed that the nozzle 6 is detached from the other system while the own system X is refueling. However, the same applies when the own system X and the other system are replaced.

FIG. 5 is a time chart of the above operation.

At time t1 in the figure, when the nozzle 6A is removed and the switch 7A is turned on, the control valve 5A and the motor 1 are turned on. Next, at time t2, the lever of the nozzle 6A is opened, and oil is refilled in the A system until time t3. In addition, during this period, a flow rate pulse is output and the amount of refueling is measured and displayed. And
When the nozzle 6A is returned to the nozzle hook and the switch 7A is turned off at time t4, the control valve 5A and the motor 1 are turned off, and one refueling is completed.

When the nozzle 6A is removed again at the time t5 and the switch 7A is turned on, similarly to the above, during the time t6 to t8, the A system is refueled. Then, the supply is completed at time t10 when the nozzle 6A is returned and the switch 7A is turned off. During this time, when the nozzle 6B is removed and the switch 7B is turned on at time t7, the valve opening detection flag FLGK (B) of the B system becomes "1" at this time (see step S18 in FIG. 4).

When the switch 7A is turned off at the time t10, the valve opening detection flag FLGK (B) is set to "1", so the valve opening detection of the nozzle 6B is performed. That is, the controller 9 determines that the time t1
The control valve 5A is closed and the control valve 5B is opened to 0, the motor 1 is intermittently driven to perform inching, and a small amount of oil B
Supply to the grid. In this case, if the nozzle 6B is closed and the flow rate K is less than or equal to the set flow rate K0, the refueling prohibition flag FLGS (B) of the B system is set to "0" to cancel the refueling prohibition and the valve opening detection flag K (B ) To “0”. After that, at time t12, as shown by the alternate long and short dash line, even if the switch 7B is not turned off and on once, the control valve 5B and the motor 1 are automatically turned on as shown by the solid line to refuel the B system. You may allow it.

On the other hand, as shown by the broken line, the nozzle 6B is left open (after time t9), and when the flow rate K is larger than the set flow rate K0 as a result of the valve opening detection, the control valve 5B and the motor 1 at time t11. Turn off and, and prohibit refueling of system B. This refueling prohibited state is connected until the nozzle 6B is closed, once returned to the nozzle hook, and then removed again.

According to this first embodiment, if the nozzle 6B of the B system is removed when the refueling of the A system is completed, the valve opening detection is performed, and the refueling is prohibited when the valve is open. Therefore, the oil is not scattered.

Next, FIG. 6 is a block diagram showing the configuration of the second embodiment of the present invention. In this embodiment, there are two of A system and C system.
While the oil supply system of the system is provided, the oil supply amount display system is one system. That is, the supply system of the A system is the motor 1A, the pump 2A, the flow meter 3A, the pipeline 4A,
It is composed of control valve 5A and nozzle 6A, and the supply system of C system is motor 1C, pump 2C, flow meter 3C, pipe line 4C, control valve 5
C, nozzle 6C. On the other hand, the display system is
It consists of a display 11α.

The operation of the second embodiment is almost the same as that of the first embodiment.

That is, as shown in the time chart of FIG.
Nozzle 6A is removed from t1 to t4, and control valve 5A
And the motor 1A are turned on. Also, from time t2 to t3,
Nozzle 6A of system A is opened and refueling is performed.

Next, when the nozzle 6A is removed at time t5, the switch
7A is turned on, and control valve 5A and motor 1A are driven. Subsequently, at time t6, the nozzle 6A is opened to supply the A system oil, and at time t8, the oil supply ends. Also, at time t9, the nozzle
When 6A is returned to the nozzle hook, switch 7A is turned off and control valve 5A and motor 1A are turned off.

During this time, when the nozzle 6C is removed from the nozzle hook at time t7, the valve opening detection flag FLGK (C) becomes "1" at this time. Therefore, the valve opening detection is performed from the time t9 when the refueling of the system A is completed (see step S61 onward in FIG. 4). That is, the controller 9 opens the control valve 5C, intermittently drives the motor 1B to perform inching, and outputs the C system transmitter 8C.
Check for flow pulses from. Then, when the flow rate K is less than or equal to the set flow rate K0, it is determined that the nozzle 6C is closed, and refueling of the C system is permitted. On the other hand, when the flow rate K is now larger than the set flow rate K0, it is determined that the nozzle 6C is open, the refueling is prohibited, and the valve open alarm is output.

When the worker closes the valve of the nozzle 6C and returns it to the nozzle hook by the valve opening alarm, the opening of the C system is detected again from this time t10 (see step S71 and subsequent steps in FIG. 4).
In this case, since the valve of the nozzle 6C is closed, the valve opening alarm is released and the prohibition of refueling is lifted. Thus, the nozzle 6C
It is possible to prevent the oil from accidentally leaking out.

In each of the above-described embodiments, the case of two systems has been described, but the same processing can be performed in the case of three or more systems.

Further, in the above embodiment, steps S61 to S6 in FIG.
The configuration for determining the nozzle valve opening detection, which is shown in 5 and steps S71 to S75, is not limited to this. That is, for example, a sensor for generating a signal by optically or magnetically detecting that the lever is in the valve opening position by bringing the valve of the nozzle close to the lever for opening the valve is used as a nozzle of each oil supply system. It is also possible to determine whether or not the detection signal is output from this sense, in correspondence with the above.

[Effects of the Invention] As described above, the present invention is a refueling device having a plurality of nozzles and capable of refueling from any one of these nozzles, during refueling of one system, another system When the nozzle of is removed, the valve opening detection of that nozzle is performed.Therefore, even if the nozzles other than the nozzle being refueled are left open, the oil will be mistaken when the nozzle is removed. It is possible to prevent the inconvenience of being scattered.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention, FIG. 2 is a diagram for explaining the types and functions of flags in the first embodiment, and FIGS. 3 and 4 are the first embodiment. 5 is a flowchart showing the operation of the example, FIG. 5 is a time chart showing the operation of the first embodiment, FIG. 6 is a block diagram showing the configuration of the second embodiment of the present invention, and FIG. 7 is the operation of the second embodiment. 8 is a diagram showing the structure of a conventional MPD type weighing machine, FIG. 8 (a) is a front view, and FIG. 8 (b) is a plan view. 1,1A, 1C …… Motor, 2,2A, 2C …… Pump, 3,3A, 3C ……
Flowmeter, 4,4A, 4C …… Pipe, 5,5A, 5B, 5C …… Control valve, 6,6
A, 6B, 6C …… Nozzle, 7,7A, 7B, 7C …… Switch, 8,8A, 8C
…… Transmitter, 9 …… Controller, 11α, 11β …… Display.

Claims (1)

[Claims] 1. A plurality of refueling systems each comprising a refueling hose and a refueling nozzle, wherein a plurality of refueling system indicators or pumps are shared, and each refueling system starts a refueling operation by means of a refueling nozzle, Nozzle operation detection means for generating a signal according to the end is provided respectively, based on the start signal of the refueling operation output by each nozzle operation detection means,
In a refueling device equipped with a refueling control means that selectively permits refueling by one refueling system and disables simultaneous refueling by a plurality of refueling systems, refueling operation by the nozzle operation detection means of one permitted refueling system After the start signal is output and before the end signal of the refueling operation is output, it is detected that the start signal of the refueling operation is output by the nozzle operation detection means of the other refueling system, and the simultaneous refueling by the other refueling system is detected. The storage means for storing the fact that the trial has been performed is provided, and after the end signal of the refueling operation by the nozzle operation detection means of one permitted refueling system is output, the other refueling system stored in the storage means A means for inspecting whether the valve of the refueling nozzle is closed or not is provided, and when the inspection means detects that the valve of the refueling nozzle is open, the other refueling nozzle Even if the start signal of the oil supply operation from the nozzle operation detecting means of the system is output, the oil supply control means that other fuel supply system fuel supply apparatus formed by providing an oil supply inhibiting means for inhibiting the refueling by.