JPH026720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid supply system that has the function of program inspection of a fluid supply system and operation inspection of various devices such as control valves and display meters, and particularly relates to a fluid supply system for use in oil depots commonly called depots. This invention relates to a liquid supply device that can be inspected without actually flowing oil.

Generally, when inspecting the program of the liquid supply system and inspecting instruments such as control valves and indicators at oil depots, the inspection is done by actually flowing oil. Therefore, in order to flow a predetermined amount of oil, it is necessary to park the lorry on the side of the rack and insert the loading arm into the oil filler port, just like when refueling, which makes the work cumbersome. be.

In a liquid supply device having an electronic device, the technology of displaying the flow rate using a pulse signal from a flow meter is well known, and the technology of providing a test signal to check its operation is disclosed in, for example, Japanese Patent Laid-Open No. 50-52615. It is disclosed in the publication No. However, such known technology uses a test unit that provides a test signal that simulates the input, and therefore requires work such as connecting the test unit.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a fluid supply system for oil depots that allows equipment to be easily inspected without actually pouring oil or connecting a special test unit.

According to the present invention, the oil supply amount is set by the preset signal, the control valve is opened by the liquid supply start signal, and
A liquid supply device that is controlled by a computer so that a control valve closes when a flow rate pulse from a flow meter reaches a set value is provided with a pseudo flow rate pulse generation means and a check signal generation means, and the pseudo flow rate pulse generation means is controlled by the computer. It uses an oscillator.

Therefore, when a check signal is generated by the check signal oscillating means, such as a switch, a pseudo pulse is oscillated from the pseudo flow rate pulse generating means. As is well known, since a computer is equipped with an oscillator, this pseudo flow rate pulse generating means uses the pulse oscillator that the computer is originally equipped with. This makes it extremely easy to test the meter. Therefore, it is possible to arbitrarily test the flow rate pulse of a flow meter of a liquid supply device for oil depots, which is extremely suitable.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an oil depot in which the present invention is implemented, and FIG. 2 shows its block diagram. A rack designated by the reference numeral 1 in FIG. 1 is provided with a plurality (three in the illustrated embodiment) of liquid supply devices 2a, 2b and 2c. Each of the liquid supply devices 2a, 2b, and 2c has a different type of oil, for example, the liquid feed device 2a supplies high octane gasoline, the liquid supply device 2b supplies regular gasoline, and the liquid supply device 2c supplies diesel oil. Each liquid supply device 2a, 2b, 2c (hereinafter referred to as 2
) have the same structure. The lower side of the rack plate 3 is provided with a control valve (not shown), a flow meter, and a computer or controller 7 for the liquid supply device 2, and the upper side of the rack plate 3 is provided with loading arms 8a, 8b, 8c.
(hereinafter abbreviated as 8) and data displays 11a, 11b, and 11c (hereinafter abbreviated as 11) are provided.

Each loading arm 8 is connected to a piping 16 for each oil type via a control valve and a flow meter (not shown), and is connected to an oil storage tank 18 via a pump 17 (in FIG. 1, only one oil type is used). ).

Further, a case 20 provided on the rack board 3 is provided with a computer or control device 7 for a card reader 21 and a ground wire 23.

A plurality of such racks 1 are installed at an oil depot.

On the other hand, an office 25 is established at a location away from the rack 1, and a data input/output device 26 is provided within this office 25.
and rack 1 computer or control device 7,
29 through a signal line 27, and information is transmitted through serial communication.

In FIG. 1, SW ₁ and SW ₂ are respectively a starting switch and an oil amount selection setting switch provided on the loading arm 8, and 4 is a hand valve. Also, 28 is Lori. In order to carry out normal liquid supply work at such an oil depot, a specific card is given in advance to the driver of each lorry 28. The card contains information such as the vehicle number, oil depot code, and expiry date. The clerk looks at the oil distribution slip and operates the data input/output device 26 to input the type of oil to be supplied, the amount of fluid to be supplied, etc. The lorry driver receives a liquid distribution slip from office 25, goes to rack 1, and first grounds it with ground wire 23. This signal indicating that the grounding has been done is sent from the computer 29 in the case 20 to the liquid supply control computer, that is, the control device 7 (FIG. 2). will be displayed where indicated. Next, when the card is read by the card reader 21, the signal is transmitted to the computer, that is, the control data via the signal line 27, and the liquid distribution (liquid supply) data for that car number stored in the data input/output device 26 in the office 25. The information is transmitted to device 7.

The driver inserts a predetermined loading arm 8 into a predetermined hatch, selects the amount of oil with the setting switch _SW2 , and then presses the start switch _SW1 . Then, a signal from the control device 7 opens the control valve 5, a display indicating that the liquid is being supplied is displayed, and the pump 17 sends oil to the loading arm 8. Then, when the driver opens the hand valve 4, the liquid is supplied. During this time, a pulse signal from the flow meter 6 is sent to the control device 7, and the amount of liquid to be supplied is displayed on the display meter of the display device 11.

When the set amount of oil is supplied in this way, the control valve 5 is closed by a signal from the control device 7 and the indicator 11
The liquid supplying display disappears.

When the preset amounts of all oil types are supplied in sequence as described above, a liquid supply slip is printed from the data input/output device 26 in the office 25. After refueling, the driver should connect the ground connector 23.
Remove it and leave the car.

In such oil depots, each piece of equipment must be inspected at the time of installation and at regular intervals, such as once a year. According to the prior art,
You have to do the same work as above.

Therefore, according to the invention, a switch _SW3 (FIG. 2) is provided for issuing a check signal. This switch SW ₃ is located in a place that is difficult to operate, for example, the control device 7.
A storage case (not shown) is provided with a lid, and the storage case is placed inside the lid to prevent careless operation. When this check switch SW ₃ is operated, a check signal is generated, which is replaced with a pulse from the flow meter 6 by the pseudo flow pulse generating means 3 provided in the control device 7.
Pseudo pulses starting from 0 are counted.

FIG. 3 shows a control device implementing the invention.

The signal from check switch SW ₃ is sent to switching means 3.
Sent to 1. This switching means 31 normally sends the flow rate pulse signal from the flow meter 6 to the counting circuit 32, but when it receives the check signal from the check switch SW ₃ , it inputs the flow rate pulse signal from the flow meter 6. It is configured to disable input of the pseudo flow rate pulse signal from the pulse oscillator 30 and to allow input of the pseudo flow rate pulse signal from the pulse generator 30.
When SW ₃ is pressed, a pulse signal from the pseudo flow rate pulse generating means 30 is sent to the counting circuit 32. Note that this pseudo flow rate pulse generating means 30 can utilize a control device, that is, an oscillator of a computer.

Since oil will not flow during inspection work, keep the hand valve 4 closed, turn on the check switch SW ₃ , then connect the ground as described above, read the card with the card reader, and the total preset amount memory circuit will be activated. 34 stores the total preset amount from the data input/output device 26 via line 27. Then, a preset amount such as 2Kl is stored in the preset circuit 33 by the selection switch _SW2 . When the start switch _SW1 is pressed, the signal activates the pseudo flow rate pulse generating means 30 via the switching means 31, and is also transmitted to the preset circuit 33, and the control valve 5 is opened by the signal from the preset circuit.

However, since the hand valve is closed, oil is not supplied. The pulse signal from the pseudo flow rate pulse generating means 30 is counted by the counting circuit 32, and the flow rate corresponding to the pulse signal is displayed on the display meter 11, and at the same time, subtraction is performed from the preset amount stored in the preset circuit 33 to determine the remaining amount. When it becomes zero, the control valve 5 closes and the pulse also stops. The display meter 11 shows the flow rate at that time.

If you press the check switch as described above, the other operations are the same as when the oil is flushed, except that the oil does not flow. During this time, the system program and each device such as indicators and valves are activated. You can check whether it is normal.

Therefore, according to the present invention, each device or system can be inspected without actually draining oil, and the time and effort required for inspection can be significantly reduced. Further, simply by providing the switching means 31 and the check switch SW ₃ , the pseudo flow rate pulse generating means 30 can also be used for a computer, so the cost is low and the effect is extremely large.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a liquid supply station implementing the present invention, FIG. 2 is a block diagram showing a control circuit implementing the present invention, and FIG. 3 is a block diagram showing an embodiment of the present invention. . 5...Control valve, 6...Flowmeter, 11...Display meter, SW ₁
...start switch, SW ₂ ...selection switch, SW ₃ ...check switch, 7 ...control device (computer),
30...Pseudo flow rate pulse generating means, 31...Switching means, 32...Counting circuit, 33...Preset circuit.

Claims (1)

[Claims] 1 In a liquid supply device controlled by a computer, the amount of oil supplied is set by a preset signal, the control valve opens by a supply start signal, and the control valve closes when the flow rate pulse from the flow meter reaches the set value. 1. A liquid supply device comprising: a check signal generating means; and a check signal generating means, the pseudo flow rate pulse generating means using an oscillator of the computer.