JPS6112836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid supply and shipping device, and for example, while a liquid supply permission signal is output from a card reader or the like,
Even if the liquid supply stops, the pump remains driven for a certain period of time, thereby preventing frequent starting and stopping of the pump due to intermittent liquid supply, and immediately when the liquid supply permission signal disappears. It is an object of the present invention to provide a liquid supply and shipping device that can reliably prevent overload operation of the pump after completion of liquid supply, liquid leakage from piping, etc. by stopping the pump.

For example, a liquid supply and shipping device that ships oil to tank trucks may need to supply fluid to multiple tank trucks at once, or even one tank truck may need to be supplied several times due to the capacity of the hatch. There are cases where it is necessary to supply liquid separately, and if the pump were to be stopped each time the liquid supply to one hatch was completed, the number of times the pump would have to be started and stopped would become extremely large. For this reason, conventionally, in this type of liquid supply and shipping device, the pump is driven continuously for a certain period of time after liquid supply has stopped, and if the next liquid supply starts within that time, the pump continues to operate. The system continues to drive the pump, thereby reducing the frequent starting and stopping of the pump and increasing the efficiency of liquid supply work.

Therefore, it is good if the fluid supply interval is short and frequent fluid supply is performed, but even when fluid supply to all tanker trucks is completed, for example, the pump is driven for a certain period of time after the fluid supply is completed, so the pump However, there were drawbacks such as overloading the pipes or leakage of liquid from the pipes.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings. The figure shows a schematic configuration diagram of an embodiment of the liquid supply and shipping device of the present invention.

In the figure, a liquid supply and shipping device 1 is applied to a quantitative liquid supply device for tank lorries in an oil depot in this embodiment, and is used at the shipping site for example crude oil, heavy oil, light oil, etc.
A plurality of loading arms 2 are provided for each type of oil such as gasoline. The figure shows a liquid supply and shipping device for one type of oil, and in this embodiment, n loading arms 2 ₁ to 2 _o are provided so that the oil can be shipped to n tank lorries 3 at the same time.
Each of the loading arms 2 ₁ to 2 _o is provided with a metering valve 4 and a flow meter 5, and all are connected to an oil storage tank 7 via a pump 6. 8 is a card reader, and the above n loading arms 2 ₁ to 2
A card containing liquid supply information is inserted _into the card, and the liquid supply information on this card is read.

Reference numeral 9 denotes a control device installed in the building, which includes a main control unit 10 that receives a card reading signal from the card reader 8 and stores and calculates it, and a main control unit 10 that receives signals from the main control unit 10 to control the drive of the pump 6. It is generally composed of a pump drive control section 11 that performs the following steps.

The pump drive control unit 11 includes n liquid supply permission signal generating circuits _{12 1 to} 12 _o and n measuring signal generating circuits 13 1 to 13 provided corresponding to the number of loading arms 2 1 to _{2 o} . It has _o . The liquid supply permission signal generation circuits 12 ₁ to 12 _o output a liquid supply permission signal according to a command from the main control unit 10 when the liquid supply information on the card read by the card reader 8 is normal. The liquid supply permission signal does not disappear until the liquid supply amount specified by the liquid supply information is supplied. Measuring signal generation circuit 13 ₁ ~ 1
3 _o outputs a metering signal while the metering signal is being output from the flow meter 5.

Inside the pump drive control section 11, the circuit 12,
In addition to 13, for example, a delay circuit 14 that delays a drive stop signal so that the drive of the pump 6 does not stop until a certain period of time has elapsed even after the liquid supply has stopped; a flip-flop circuit 15 that holds the pump drive signal;
A buffer circuit 16 and the like that output a drive signal to the pump 6 are provided.

Next, the circuit configuration and operation of the entire pump drive control section 11 will be described using an example in which liquid is supplied to one tank lorry.

The driver of the tanker truck 3 who wants to receive refueling first stops the tanker truck 3 next to a predetermined loading arm _2k , and then uses a card on which fluid supply information such as oil type and amount of fluid to be supplied is recorded. into the card reader 8. The liquid supply information of the card read by the card reader 8 is supplied to the main control section 10 of the control device 9 .

Here, the oil tank of the tank lorry vehicle 3 is divided into three hatches 3a, 3b, and 3c, and each hatch 3a, 3b, and 3c is supplied with oil amounts of Q _a , Q _b , and Q _{c ,} respectively. shall be. Therefore, the liquid supply permission signal generation circuit 12 _k corresponding to the loading arm 2 _k
From then on, a liquid supply permission signal is outputted until the entire oil quantity of Q _a +Q _b +Q _c is completed. This liquid supply permission signal is supplied to the interlock circuit 18 through the OR circuit 17, thereby opening the interlock circuit 18.

The driver of the tank truck 3 first opens the manhole of the first hatch 3a and removes the loading arm 2.
Insert the tip of _k into the hatch 3a and press the liquid supply start button (not shown). As a result, the pump 6 is activated and metered liquid supply is started. At the same time, a refueling signal is transmitted from the refueling signal generating circuit _13k corresponding to the flowmeter 5 of the loading arm _2k , and this signal is transmitted through the OR circuit 19 to the flip-flop circuit 1.
5 set side terminal and one shot multi circuit 20
and will be supplied. The flip-flop circuit 15 is set by the signal supplied to the set port of the flip-flop circuit 15, and the flip-flop circuit 15 is set.
The pump drive signal is held by the output from the flop circuit 15 via the buffer circuit 16. On the other hand, in this embodiment, the one-shot multi-circuit 20 is configured to operate at the falling edge of a signal, and therefore no signal is supplied from the one-shot multi-circuit 20 to the interlock circuit 18.

When the first hatch 3a is supplied with Qa _of oil, the metering valve 4 is automatically closed by a signal from the main control section 10. As a result, the measuring signal outputted from the measuring signal generating circuit 13 _k disappears, and at the same time as this signal falls, the signal from the one shot multi circuit 20 passes through the interlock circuit 18 and is supplied to the delay circuit 14. Ru.

Since the delay circuit 14 delays the pump stop signal for a certain period of time, the pump 6 does not stop at the same time as the liquid supply to the first hatch 3a ends. That is, if liquid supply to the second hatch 3b is started within the above-mentioned fixed time, the pump stop signal is not output from the delay circuit 14, and the pump 6 is thereby stopped.
without stopping the second hatch 3.
The liquid supply to b can be started. Similarly, even after the liquid supply to the second hatch 3b is completed, the third hatch 3b is opened within the delay time of the delay circuit 14.
Once the liquid supply to c is started, the pump 6 can be continuously driven without being stopped.

In this way, the second hatch 3b and the third hatch 3
It is possible to continuously supply liquid to c without stopping the pump 6 even once during the process. There is no need to start the pump 6 every time the liquid is started.

When the liquid supply to the third hatch 3c is completed, the liquid supply permission signal disappears according to a command from the main control section 10, and the one-shot multi-circuit is activated by a signal from the inverter circuit 21 connected to the OR circuit 17. 22 is activated, and the flip-flop circuit 15 is cleared by the signal from the one shot multi circuit 22. As a result, the signal output from the set side output terminal of the flip-flop circuit 15 to the buffer circuit 16 disappears, and the pump 6
drive will stop.

If the time interval during which the liquid supply is interrupted is longer than the delay time of the delay circuit 14, the signal from the delay circuit 14 passes through the one-shot multi-circuit 22 to the flip-flop circuit 15. This causes the pump 6 to stop driving.

As described above, the liquid supply and shipping device 1 continuously drives the pump 6 until the liquid supply is completed, even if the liquid supply is interrupted, as long as the interruption is only for a short time. In addition, since the pump 6 is configured to stop immediately when the liquid supply is completed, for example, the pump 6 may be overloaded because the pump 6 is being driven even though the liquid supply has actually been completed. It is possible to reliably prevent inconveniences such as when the liquid pressure in the piping of the loading arm 2 or the like increases and liquid leaks from the piping.

If you want to emergency stop the pump 6 during liquid supply, or if you want to confirm that the pump 6 has stopped when you are about to start shipping, press the reset button (not shown). ) etc. to activate the reset circuit 23 and reset the flip-flop circuit 15.

In the above explanation, the case of supplying oil to one tank truck 3 was taken as an example, but there are cases where two or more tank trucks supply the same type of oil at the same time. A liquid supply permission signal is output from the liquid supply permission signal generating circuit 12 corresponding to all the loading arms 2.

Therefore, even if fluid supply to one tank lorry vehicle 3 is completed, if another tank lorry vehicle is supplying fluid, the pump 6 will not stop, and the fluid supply to the tank lorry vehicle 3 that was supplying fluid to the end will continue. When this is completed, that is, when all liquid supply is completed, the pump 6 stops at the same time as the liquid supply permission signal disappears.

In addition, in the above embodiment, the liquid supply and shipping device 1 is
Not limited to oil liquid shipping facilities for tanker trucks,
It can be applied to shipping facilities for other liquid types and other liquid supply targets.

As described above, the liquid supply and shipping device of the present invention includes a liquid supply pipe provided with a flow meter and a metering valve and connected to a liquid supply source via a pump, and a specified liquid supply pipe when supplying liquid through the liquid supply pipe. a liquid supply permission signal generation circuit that outputs a liquid supply permission signal until the amount of liquid is supplied and cancels the interlock, and a metering signal generation circuit that outputs a metering signal while the metering signal is output from the flowmeter; A delay circuit that delays the pump stop signal until a preset period of time or more has elapsed even if the liquid supply is interrupted and the metering signal disappears while the liquid supply permission signal is being output; When the liquid supply permission signal is output, a pump drive signal is output, and when the liquid supply permission signal disappears, a pump stop signal is immediately outputted to stop the pump. While the liquid permission signal is being output, the pump stop signal is delayed for a certain period of time, so that the pump continues to drive even if the liquid supply is interrupted or stopped due to liquid supply work, and the pump stop signal is delayed for a certain period of time. This prevents the pump from repeatedly starting and stopping every time the process is interrupted, thereby reliably preventing inconveniences such as a drop in liquid supply efficiency.Furthermore, when the liquid supply operation is completed, the liquid supply permission signal disappears, causing the pump to stop repeatedly. A stop signal can be output without delay to stop the pump immediately.
Therefore, it is possible to reliably prevent overload operation of the pump or liquid leakage after completion of liquid supply, and this can be used, for example, when supplying liquid intermittently to a specific target, or when supplying liquid to multiple targets with different times. It has the advantage that it is particularly suitable for simultaneously supplying liquid to several liquid targets.

Further, the liquid supply and shipping device of the present invention is configured to output a liquid supply permission signal based on the liquid supply information read from a card by a card reader, so that, for example, a card reader system can be used to supply a fixed amount of liquid to a tank truck or the like. It is particularly suitable for equipment, etc., and has features such as being able to favorably promote the introduction of computers, etc. to liquid supply and shipping management systems.

[Brief explanation of the drawing]

The figure is a schematic diagram of an embodiment of the liquid supply and shipping device of the present invention. DESCRIPTION OF SYMBOLS 1...Liquid supply and shipping device, 2, _{2 1} ~ _2o ... Loading arm, 4... Metering valve, 5... Flow meter,
6... Pump, 11... Pump drive control section, 12
₁ to 12 _o ...Liquid supply permission signal generation circuit, 14...
delay circuit.

Claims (1)

[Scope of Claims] 1. A liquid supply pipe that is provided with a flow meter and a metering valve and is connected to a liquid supply source via a pump, and a specified amount of liquid is supplied through the liquid supply pipe. a liquid supply permission signal generation circuit that outputs a liquid supply permission signal until the liquid supply permission signal is reached and cancels the interlock, a metering signal generation circuit that outputs a metering signal while the metering signal is output from the flowmeter, and a liquid supply permission signal that outputs the liquid supply permission signal. While this is being output, even if the liquid supply is interrupted and the metering signal disappears, there is a delay circuit that delays the pump stop signal until a preset period of time has elapsed, and the metering signal is output. A liquid supply and shipping device comprising: a circuit that sometimes outputs a pump drive signal, and immediately outputs a pump stop signal to stop the pump when the liquid supply permission signal disappears. 2. The liquid supply permission signal is configured to be output based on a signal output from a card reader when a card recording liquid supply information is inserted into the card reader. 1
Liquid supply and shipping device as described in section.