JP2554788B2 - How to display the weighing of the lubricator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metering and displaying method which can be suitably applied to an oil supply system in which fuel oil pumped up by one pump is branched into a plurality of nozzles and pressure-fed.

[0002]

2. Description of the Related Art Conventionally, fuel oil such as gasoline or light oil pumped by one pump is branched into two nozzles and pressure-fed, and the amount of oil supplied individually from each nozzle is supplied to each nozzle. 2. Description of the Related Art A refueling device is used in which a refueling amount corresponding to each nozzle is individually displayed by a display means based on a pulse signal from a pulse transmitter which is a measuring means provided in a continuous oil feeding path.

[0003]

In such a prior art, while refueling is being performed by each nozzle, while refueling is stopped by operating the operation lever of one nozzle, refueling of the other nozzle is stopped. Then, the display value of the display means corresponding to the one nozzle may slightly increase. That is, since each nozzle is connected to the oil feeding path via a duct having elasticity such as rubber, if one nozzle is blocked while the other nozzle being refueled is blocked, it remains driven. The so-called water hammer phenomenon occurs due to the pressure from a certain pump, and the inside of the oil feed path is instantaneously pressurized above the output of the pump. Therefore, the stretchable conduit slightly expands, and the flow rate pulse transmitter provided corresponding to the one nozzle that has stopped refueling first, sends the flow that corresponds to the expansion of the conduit. The amount of oil is counted and the display value of the display means is increased. Therefore, the customer who has been refueled by the one nozzle that has stopped refueling may notice that the display value of the display means has increased even though one nozzle is obviously not in the refueling state, It is desired to prevent such an undesired increase in the display value.

Therefore, it is an object of the present invention to prevent the display value indicating the amount of refueling of the display means corresponding to the nozzle that has stopped refueling from rising due to the refueling stop operation of the remaining nozzles that are refueling. Another object of the present invention is to provide a weighing display method for the refueling device.

[0005]

According to the present invention, fuel oil pumped up by one pump is branched and supplied to a plurality of oil feed passages, and each oil feed passage is provided with a stretchable conduit. A fueling device that pressure-feeds to a plurality of nozzles that are individually connected, and that individually displays the amount of lubrication that corresponds to each nozzle on the basis of the measured value from the measuring means that is provided in each oil-feeding path, by means of the display means. In the weighing display method, the second weighing value re-weighed is equal to or less than a predetermined value after a predetermined time has elapsed since the first weighing value from the weighing means was stopped while the pump was driven. If so, the second measured value is once held, and when the second measured value reaches the predetermined value, the held second measured value is added to the display value of the display means. Metering of refueling device characterized by displaying A How to Display.

[0006]

According to the present invention, the fuel oil pumped up by the pump is branched and supplied to the plurality of oil feeding paths, and individually pumped from the respective oil feeding paths to the plurality of nozzles through the pipes. It Measuring means are respectively provided in the respective oil supply paths, and the amount of oil supplied from each nozzle is individually displayed by the display means based on the measured values from these measuring means. With the pump running, the first
After a predetermined time has passed since the weighing value of
If the second measured value measured again is less than or equal to a predetermined value, the second measured value is held once. Therefore, even if the measured value of the measuring means of the nozzle that has stopped refueling rises after a predetermined time elapses, for example, due to the water hammer phenomenon due to the blocking of the remaining nozzles after the nozzle is shut off and refueling is stopped, this rise is displayed. Can be prevented from being displayed. Further, when the second weight value reaches a predetermined value, the held second weight value is added to the display value of the display means and displayed by the display means. Therefore, when the blocked state of the nozzle that stopped refueling is released and refueling is performed, and the second measured value that has been measured reaches a predetermined value after a lapse of a predetermined time, the held second measured value is displayed. Is added and displayed. In this way, it is possible to prevent the display value of the nozzle that has stopped refueling from rising due to the refueling stop operation of the remaining nozzles.

[0007]

FIG. 1 is a system diagram showing the overall construction of an embodiment of the present invention. Refueling device 1 provided in a gas station, etc.
Is a pump 6 driven by a pump motor 5 from a pipeline 3 through a check valve 4 for fuel oil such as gasoline or light oil stored in a storage tank 2 buried underground or the like.
Is supplied to oil feed pipes 8a and 8b which are oil feed routes that branch in two directions via the pipe line 7, and are flexible pipes 9a, which are elastic and flexible pipe lines such as rubber. The nozzles 9a and 10b are pressure-fed to the pair of nozzles 10a and 10b, respectively.

The nozzles 10a and 10b are detachably attached to the nozzle cases 11a and 11b. Each nozzle case 11a, 11b has a nozzle detection switch 12a,
12b are provided respectively. The nozzle detection switches 12a and 12b output the nozzle detection signal s1 that is at a low level when the nozzles 11a and 11b are locked to the nozzle cases 11a and 11b, and at a high level when the nozzles are removed. These nozzle detection switches 12
The nozzle detection signal s1 from a and 12b is the control means 13
Is input to at least one nozzle detection switch 12
When the nozzle detection signal s1 from a (or 12b) is input, a motor drive signal s2 is output to drive the pump motor 5, which drives the pump 6 and pumps up the fuel oil.

A flow control valve 1 is provided on the one oil feed pipe 8a.
5a are provided respectively. These flow control valves 15a
Is opened / closed by the flow rate control signal s3 output by the control means 13 in response to the nozzle detection signal s1. That is, when the nozzle 10a is removed from the nozzle case 11a, the valve is opened, and when the nozzle 10a is hooked on the nozzle case 11a, the valve is closed. The oil supply pipe 8a also includes a flow control valve 1
A flow meter 16a is provided downstream of 5a in the oil feeding direction,
Corresponding to the flow rate measured by this flow meter 16a,
From the flow rate pulse transmitter 17a which is a measuring means, for example, 1
One flow rate pulse signal s4 is output every / 100 liters. Control means 1 to which this flow rate pulse signal s4 is input
3 outputs a weighing value display signal s5 for displaying a weighing value corresponding to the number of pulses, and is digitally displayed by a display 18a which is a display means.

Further, regarding the other oil feeding pipe 8b,
The structure similar to the structure related to the oil feeding pipe 8a is provided, and the corresponding part is given a subscript b and its description is omitted.

FIG. 2 is a block diagram showing the electrical construction of the control means 13. When refueling, when the nozzle 10 is removed from the nozzle case 11 (generally, the subscripts a and b are omitted), the nozzle detection signal s1 of the nozzle detection switch 12 becomes high level, and the motor drive circuit 21. Outputs the motor drive signal s2 to drive the pump motor 5. In this way, with the pump 6 driven, the discharge pipe 22 of the nozzle 10 is inserted into the fueling port of the fuel tank of the automobile that has received refueling, and the operating lever 23 is operated to open / close the valve built in the nozzle 10. When refueling is started with the valve open, the flow rate pulse signal s4 from the flow rate pulse transmitter 17 is input to the determination circuit 24.

The determination circuit 24 counts with the clock pulse signal s6 from the clock pulse oscillator 25,
As shown in FIG. 3, the flow rate pulse signal s4, which is the first measured value, is input from the flow rate pulse transmitter 17 at the time W1 when refueling is performed. When stopped at t1, the determination circuit 24
When the flow rate pulse signal s4 is input again until time t2 when the timer operation is started and the time W2 = 3 seconds preset in the time setting circuit 28 is finished, refueling is continuously performed. It is determined that the flow rate pulse signal s4 is output as it is, and the counting circuit 27 causes the time t
The measured value display signal s5 added to the number of pulses already counted before 1 is output, and the amount of refueling is displayed by the display 18.

When the flow rate pulse signal s4, which is the second measured value, is input to the determination circuit 24 after time t2, the pulse number determination signal s7 of, for example, 4 pulses which is preset in the hold pulse number setting circuit 26. If the flow rate pulse signal s4 is 3 pulses or less (3 pulses in the present embodiment), the determination circuit 24 does not hold and output the flow rate pulse signal s4 of 3 pulses or less, and refuel at time t3 again. When the flow rate pulse signal s4 is input and the second measured value reaches 4 pulses, and the number of held pulses reaches 4, the 4 pulse that is the second held value is held. The number of pulses to be added is output to the counting circuit 27, counted, and displayed on the display unit 18.

The determination circuit 24 as described above finishes measuring the waiting time W2 = 3 seconds set in the time setting circuit 28 from the time t1 in synchronization with the clock pulse signal s6 from the clock pulse oscillator 25. At the right time
The flow rate pulse signal s4 input thereafter is compared with the pulse number determination signal s7 to make the determination as described above. In addition,
In the present embodiment, it is assumed that the flow rate pulse signal s4 is input at the same time as the time t2 at which the waiting time W2 has been measured.

The counting circuit 27 resets and displays the count value when the nozzle detection signal s1 from the nozzle detection switch 12 changes from low level to high level, that is, when the nozzle 10 is removed from the nozzle case 11. Bowl 1
Zero is reduced to 8. Further, when the nozzle detection signal s1 is at a high level, the control valve drive circuit 29 causes the flow rate control signal s3.
Is output, which causes the control valve 15 to open.

FIG. 4 is a flow chart for explaining the weighing display operation during refueling. From step n1 to step n2, it is determined whether or not the nozzle 10 is separated from the nozzle case 11. At least one nozzle 10
When a is removed from the nozzle case 11a, the process moves to step n3, and the nozzle detection signal s1 from the nozzle detection switch 12a becomes high level. Thereby, the control means 13
Outputs the flow rate control signal s3 to open the flow rate control valve 15a, outputs the motor drive signal s2 to drive the pump motor 5, and the pump 6 starts the fuel oil pumping operation. The other nozzle 10b remains hooked on the nozzle case 11b, and in this state, the flow rate control valve 15
b is closed.

In step n2, when none of the nozzles 10a and 10b is removed from the nozzle cases 11a and 11b, the process proceeds to step n4, the pump 6 is stopped, and the flow control valves 15a and 15b are closed. ing. Therefore, each of the indicators 18a and 18b keeps displaying the amount of refueling at the time of the previous refueling in step n5, and the waiting state is maintained.

From step n3 to step n6,
The determination circuit 24a corresponding to the nozzle 10a removed from the nozzle case 11a causes the flow rate pulse transmitter 17
It is determined whether the flow rate pulse signal s4 from a is 8 pulses or less. This 8-pulse signal is set in correspondence with the above-described 4-pulse pulse number determination signal s7. That is, when the previous refueling was the preset refueling, the pump 6 is once stopped when the preset value is reached. Therefore, when the pump 6 is driven again by the current refueling, the oil feeding pipes 8a and 8b and the flexible pipes are Nozzles 10a and 10b are provided inside the pumps 9a and 9b while the pump 6 is still operating.
It is at a lower pressure than in a normal refueling outage, where it only closes. Therefore, when the stopped motor 6 is driven again by the start of refueling this time, the amount of refueling flowing into the oil feeding pipes 8a, 8b and the flexible pipes 9a, 9b becomes large, which is more than 4 pulses. The number of pulses to be held in the determination circuits 24a and 24b is set to 7 in advance and set to 8 pulses.

Therefore, if the number of pulses is 7 pulses or less in step n6, the previous time is preset lubrication and the flexible tube 9a,
It is determined that the unlubricated amount is due to the swelling of 9b or the like, the determination circuit 24a holds the flow rate pulse signal s4 of 7 pulses or less, and the display 18a displays the display "0.00" in step n7. . The pulse number determination signal s7 of 8 pulses in consideration of such preset refueling is also set in the holding pulse number setting circuit 26.

In step n6, 8 pulses exceeding 7 pulses
When the pulsed flow rate pulse signal s4 is input to the determination circuit 24a, the process proceeds to step n8, the determination circuit 24a successively outputs the flow rate pulse signal s4 from the flow rate pulse transmitter 17a, and the counting circuit 27a counts it. The meter value display signal s5 corresponding to the flow rate pulse signal s4 is output, and the display unit 18 displays the display "A" while counting up the display "A" corresponding to the amount of oil supplied from the nozzle 10a.

When the predetermined amount of lubrication is reached in this way,
Moving to step n9, the operating lever 23a of the nozzle 10a
Is returned and it is determined whether refueling has stopped. If refueling is not stopped, the process moves to step n8 again, and the refueling amount is displayed while being added by the display 18a as long as refueling is continued. When refueling is stopped, the process proceeds to step n10, where it is determined that it is time t1 described with reference to FIG. 3, and from this time t1 time W2 = 3.
It is determined whether or not the flow rate pulse signal s4 from the flow rate pulse transmitter 17a is input to the determination circuit 24a while the second elapses.

When the flow rate pulse signal s4 is not input after measuring this time W2 = 3 seconds, the nozzle 10a
It is judged that the refueling from the above is finished, the process moves to step n11, the counting by the counting circuit 27a is stopped, and the display by the indicator 18a is kept at the refueling amount at the end of the refueling.

Further, when the flow rate pulse signal s4 is input to the determination circuit 24a by the end of the measurement of 3 seconds in step n10, the counting circuit 27a continues counting in step n12, and the counting circuit 27a is continued.
The display value of the display 18a is added by the measured value display signal s5 from, and the operations of steps n9, n10 and n12 are repeated.

When steps n9, n10 and n11 are carried out again to step n13, it is judged whether or not the nozzle 10a has been returned to the nozzle case 11a. When the nozzle 10a is returned to the nozzle case 11a, the process proceeds to step n4,
The pump 6 is stopped and the refueling operation ends. If the nozzle 10a is not returned to the nozzle case 11a, the process proceeds to step n15, and it is determined again whether or not the flow rate pulse signal s4 is input to the determination circuit 24a. At this time, when the other nozzle 10b, which has been refueling, releases the operation lever 23b to stop the refueling operation, the flow rate pulse transmitter 17a provided in association with the one nozzle 10a which has already stopped the refueling operation. A flow rate pulse signal s4 of 3 pulses or less corresponding to the expansion amount of the flexible tube 9 is generated and input to the determination circuit 24a. If the flow rate pulse signal s4 is 3 pulses or less, it is determined that the nozzle 10a is not refueling, and it is held.
When 0a starts refueling again and the flow rate pulse signal s4 reaches 4 pulses, and the number of held pulses becomes 4, in step n16, the held 4 pulses are added to the counting circuit 27a as the number of pulses to be added. The unlubricated amount ΔA corresponding to the number of pulses less than or equal to 3 that was output and counted and held
The weighing value display signal s5 to which the
Display on 8b.

In this way, while the pump 6 is still being driven, while one of the nozzles 10a and 10b is supplying oil, one nozzle 10a is operated by the operating lever 23a.
Is released to stop refueling, and then the other nozzle 10b
Even if the operator releases the operation lever 23b to stop refueling, a flow rate pulse corresponding to the amount of oil that has flowed into the oil supply paths 8a and 9a on the nozzle 10a side that has previously stopped refueling due to the so-called water hammer phenomenon. The flow rate pulse signal s4 of 3 pulses or less from the transmitter 17a is held, and the display 18
It is not displayed on a, and when the refueling operation by the nozzle 10a is started again, that is, a predetermined value of 4
When the second measured value reaches the number of pulses and the number of held pulses becomes 4, the flow rate pulse signal s4 of 4 pulses, which is the second measured value held, is added to display 18a.
Therefore, it is possible to reliably prevent the display value displayed on the display 18a from rising even though the fuel supply by the nozzle 10a is stopped.

In the above-described embodiment, the waiting time W2 for judging that the nozzle during refueling is closed is set to 3 seconds, but as another embodiment of the present invention, it is set to 5 seconds or longer. You may do it.

[0027]

As described above, according to the present invention, in a fuel supply system configured to supply fuel oil pumped up by one pump from a plurality of nozzles, the nozzles are shut off while the pumps are driven. If a second measured value again measured after a predetermined time has elapsed from the time when the first measured value from the measuring means is stopped is equal to or less than a predetermined value, the second measured value equal to or less than the predetermined value. The value is once held, and when the second measured value reaches the predetermined value, the held second measured value is added to the display value of the display means and displayed. Despite being stopped
It is possible to prevent the display value of the display unit corresponding to the nozzle that has already stopped refueling from increasing due to the stop of refueling operation of the remaining nozzles.

[Brief description of drawings]

FIG. 1 is a system diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of control means 13.

FIG. 3 is a diagram showing a flow rate pulse signal from a flow rate pulse transmitter 17.

FIG. 4 is a flowchart for explaining a weighing display operation.

[Explanation of symbols]

 1 Lubrication device 5 Pump motor 6 Pump 8a, 8b Oil feeding pipe 9a, 9b Flexible pipe 10a, 10b Nozzle 12a, 12b Nozzle detection switch 17a, 17b Flow rate pulse transmitter 18a, 18b Indicator 24a, 24b Judgment circuit 26 Number of held pulses Setting circuit 28 hours Setting circuit s1 Nozzle detection signal s2 Motor drive signal s3 Flow rate control signal s4 Flow rate pulse signal s5 Weighing value display signal s6 Clock pulse signal s7 Pulse number discrimination signal

Claims (1)

(57) [Claims] 1. A plurality of fuel oils pumped by one pump are branched and supplied to a plurality of oil feeding paths, and a plurality of fuel oils are individually connected from the respective oil feeding paths via elastic conduits. In a metering display method of a fueling device, which pumps to a nozzle and individually displays the amount of oil supply corresponding to each nozzle on the basis of a measured value from a metering unit provided in each oil supply path, by the pump, While driving, the first from the weighing means
After a predetermined time has passed since the weighing value of
If the second weighed value weighed again is less than or equal to the predetermined value, the second weighed value is once held, and when the second weighed value reaches the predetermined value, the second held value is held. 2. A weighing display method for a refueling device, characterized in that the weighing value of 2 is added to the display value of the display means and displayed.