JPH0144475Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a quantitative liquid supply device used, for example, when loading oil into a tank truck.

[Prior art]

As is well known, gasoline and the like sold to general consumers are transported from shipping sources to gas stations by tanker trucks. When this tank truck is loaded with gasoline, etc. at the shipping location, the minimum unit of loading amount is Kl (1000), unlike when it is retailed to general consumers. Therefore, tank trucks have, for example, 1Kl, 2Kl, 4Kl.
Gasoline and other items are being loaded in large quantities.

On the other hand, this loading work is automatically performed by the stage controller under the control of the host computer, and the stage controller confirms that the host computer has cleared the interlock condition. When the shipping OK signal is on, the metering valve is controlled to load. In other words, taking as an example the case of loading 1Kl as shown in Fig. 7, when the loading is started with the shipping OK signal being supplied from the host computer, the metering valve is set to a half-open state.
Supply liquid at a small flow rate, and when the loading amount reaches P ₁ , fully open the metering valve and increase the flow rate. and,
When only a predetermined amount α remains by the time the loading amount reaches 1 Kl, that is, when the loading amount reaches P ₂ (1 Kl−α), the metering valve is set half-open again to reduce the flow rate. , then the loading amount is 1Kl and the stroke amount β
When the value obtained by subtracting is reached, the metering valve is fully opened and loading is stopped. As a result, 1 Kl of oil is loaded into the tank truck. in this way,
Since the valves are controlled in two stages at the start and immediately before the end of liquid supply, it is possible to eliminate measurement errors due to the residual amount in the pipe and the overflow amount, and it is possible to carry out extremely accurate loading. In addition, when loading 2Kl, similar valve control is performed, as shown in Figure 8, the metering valve is first opened half-open to start liquid supply, and when the loading amount reaches P ₁ , the metering valve is opened. When the metering valve is fully opened and only the predetermined amount α remains until 2Kl, that is, when the loading amount reaches P ₃ (2Kl - α), the metering valve is half-opened again, and then from 2Kl When the value obtained by subtracting the stroke amount β is reached, the metering valve is fully closed to stop the liquid supply and 2Kl is loaded.

[Problem that the invention attempts to solve]

By the way, if the host computer side detects some kind of abnormality, that is, the occurrence of an interlock condition, such as when the grounding device is disconnected and the interlock is engaged during the loading operation, the host computer turns off the above-mentioned shipping OK signal. in this case,
The stage controller rounds up the amount (1Kl) so that there are no fractions less than the minimum in the loading amount.
(hereinafter referred to as unit liquid supply amount), and then the liquid supply is stopped. on the other hand,
When stopping the liquid supply, two-stage control of the metering valve must be performed as described above. For this reason, when the shipping OK signal is turned off, a problem may occur depending on the amount of cargo loaded at that time. That is, to explain using FIG. 8, if the signal is turned off when the loading amount is within the range of 1 Kl to 2 Kl, it is sufficient to continue supplying liquid without taking any action and to load 2 Kl. In addition, if the signal turns off when the loading amount is within the range of 0 to P ₂ Kl (for example, point A in the figure), if the liquid supply continues and the loading amount reaches P ₂ Kl, the quantification will start. It is sufficient to carry out two-stage control of the valve to load a unit liquid supply amount of 1 Kl (double-dashed line in the figure). However, the loading amount is P ₂
When the signal turns off within the range of Kl to 1Kl (for example, point B), the remaining loading amount up to 1Kl, which is the unit liquid supply amount, is less than the predetermined amount α mentioned above, so the stage controller cannot be controlled. For this reason, conventionally, when the shipping OK signal was turned off when the loading amount was within the above-mentioned range, the stage controller immediately fully closed the metering valve and stopped the liquid supply. Then, if the amount was less than 1Kl, the staff would insert a rod called a standard length into the supply port of the tank truck and add it manually while measuring the height of the liquid level. This is not only inconvenient, but also extremely dangerous.

In view of the above circumstances, this design automatically replenishes up to the unit loading amount even if the remaining amount of liquid supplied is less than the predetermined value when the shipping OK signal turns off, requiring no manual operation. The purpose of the present invention is to provide a metered liquid supply device that does not require

[Means for solving problems]

In order to achieve the above object, the present invention includes an output means that confirms that the interlock condition is released during loading work and outputs a shipping OK signal, a flow meter inserted in the liquid transfer path, and a flowmeter that outputs a shipping OK signal. In a metering liquid supply device comprising a metering means for metering the loading amount based on a flow rate pulse output from a flowmeter, and a metering valve that is inserted in the transfer path and closes in two stages, the loading of the liquid is carried out. If the shipping OK signal from the output means is turned off during the process, the loading amount measured by the measuring means is calculated by subtracting a predetermined remaining liquid supply amount from the unit supply liquid amount of this loading amount. a first determining means for determining whether or not the loaded amount is larger than the value;
a fully closing means for fully closing the metering valve in one step when it is determined that the value is greater than the subtracted value; a valve opening means that opens in a flow state;
When the metering valve is opened by the valve opening means, whether the loading amount measured by the measuring means has reached a value obtained by subtracting a predetermined passing amount from the unit liquid supply amount. a second determining means for determining whether or not the quantity is exceeded; and a valve that closes the metering valve when the second determining means determines that the loading amount has reached a value obtained by subtracting the predetermined amount of overflow. It is characterized by comprising a closing means.

[Effect]

According to the present invention, when the shipping OK signal is turned off and the remaining liquid supply amount up to the unit loading amount is less than a predetermined value, the metering valve is fully closed in one step, and then the metering valve is opened to a small flow state. Supply liquid. When the loading amount reaches the above value, the metering valve is closed to stop the liquid supply.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a liquid supply system equipped with a quantitative liquid supply device according to an embodiment of the present invention. In the figure, 1 is a pump that pumps oil in a storage tank (not shown), and 2 is a strainer. Further, numeral 3 is a flow meter inserted in the transfer path, and 4 and 5 are respective on-off valves, which together constitute a metering valve that closes in two stages. These on-off valves 4, 5 (hereinafter referred to as
(referred to as V ₁ and V ₂ ) are connected in parallel and inserted into the transfer path. Also, 6 is the loading arm,
7 is a remote control box provided at the tip of the loading arm 6. As shown in FIG. 2, this remote control box has a refueling start button 8 and an oil amount setting switch 9 that allows setting of 1Kl, 2Kl, and 4Kl. Further, 10 is a stage controller, which is composed of a CPU (central processing unit), a program memory, a work memory, and the like. The program stored in the program memory has the following numerical values as liquid supply data. That is, 63.5, 1000, 2000, 3000,
4000, the value obtained by subtracting the passing amount 1.5 (corresponding to the value β mentioned above) from these 1000, ... is 998.5, 1998.5,
These are the values 898.5, 1898.5, 2898.5, and 3898.5 obtained by subtracting the predetermined remaining liquid supply amount 101.5 (corresponding to the value α described above) from 2998.5, 3998.5, and the above 1000... Based on this liquid supply data, the start signal from the remote control box 7, and the flow rate pulse from the flow meter 3, the stage controller 10
Controls opening and closing of V ₁ and V ₂ . Note that 11 is a tank truck.

On the other hand, 12 is a card reader, which supplies card data to the host computer 13 when an ID card is inserted by a worker. The host computer 13 reads the card data,
If it is confirmed that the card data is registered and that the interlock conditions, such as the installation of a grounding device when supplying liquid, have been canceled, the stage controller 10 is notified of the shipment.
Turn on the OK signal.

The operation of the metered liquid supply device having the above configuration will be explained separately for the case where loading is completed normally and the case where the shipping OK signal is turned off due to an abnormality during the loading operation.

When loading is completed normally: First, the worker inserts his or her ID card into the card reader 12. Then, the data on the ID card is read by the card reader 12 and supplied to the host computer 13. The host computer 13 reads the card data, and if it confirms that the card data is registered and that the interlock condition, such as that a grounding device is installed when supplying liquid, has been released, then the stage A shipping signal is turned on for the controller 10. Next, the worker inserts the tip of the loading arm 6 into the supply port of the tank truck 11, sets the oil amount setting switch 9 of the remote control box 7, and presses the refueling start button 8. When the refueling start button 8 is pressed, the set value set in the oil amount setting switch 9 is supplied to the stage controller 10 along with the start signal. When the stage controller 10 is supplied with the start signal, it reads the setting value and then ships the stage controller 10.
Make sure the OK signal is turned on and start refueling. Note that refueling will not start unless the shipping OK signal is turned on. The refueling operation will be explained below using FIG. 3 A, B, and C. The stage controller 10 first turns on only _V2 . As a result, oil is supplied from the tip of the loading arm 6 to the tank truck 11 through this V ₂ . At the same time, a flow rate pulse is supplied from the flow meter to the stage controller 10, and the stage controller 10 calculates the loading amount based on this flow rate pulse. Then, the loading amount is the above-mentioned liquid supply data 6
3.5, turn on _V1 . This increases the flow rate. And the setting value is 1
If the set value is 2Kl (Figure 3 A), the loading amount is slightly before the supply liquid data 898.5, and if the set value is 2Kl (Figure 3 B), the loading amount is 1898.5.
The host computer 13 turns off the shipping OK signal when the set value is 4Kl, and when the loading amount reaches slightly before the liquid supply data 3898.5 when the set value is 4Kl (Fig. 3 C). Then, the flow of FIGS. 4 and 5 is executed. Figures 4 and 5 show the stage controller 1 when the shipping OK signal is turned off during loading, respectively.
1 is a flowchart showing the operation of 0. Now, assume that the shipping OK signal is turned off when the set value is 4Kl. Since the setting is 4Kl, steps S1 and S2 are passed, and since the loading amount at this time is a little before 3898.5, steps S3 to S5 are passed, and the judgment in step S20 is NO, so the process goes to step S21. Move. If the loaded amount matches the refueling data 3898.5 in steps S21 and S22, _V1 is turned off to reduce the flow rate (step S23), and if the loaded amount matches the refueling data 3998.5 (step S24). , S25), and _V2 is turned off (step S26). And 1.5 as excess amount
is supplied and the set amount of oil is loaded. Note that when the settings are 1 Kl and 2 Kl, the same is true as above, and the amount of oil as set is loaded.

If the shipping OK signal is turned off due to an abnormality, then during the loading process, for example, the grounding device is disconnected and an interlock is activated, which is confirmed by the host computer 13 and the host computer 1
The case where No. 3 turns off the shipping OK signal will be explained. When the shipping OK signal is turned off, the stage controller 10 determines whether the set value is 1Kl in step S1. The current set value is 4Kl, so the process moves to step S2. Note that if the set value is 1 Kl, the stage controller 10 terminates the process as the same operation as the normal loading described above. The stage controller 10 determines whether the set value is 2Kl in step S2, and then proceeds to step S3. Note that the processing when the setting value is 2Kl is substantially the same as the case where the setting value is 4Kl, which will be described below, and the explanation thereof will be omitted. The stage controller 10 is a step S
In step 3, it is determined whether the loaded amount is less than 1000. If the loading amount is less than 1000, the determination in step S6 becomes YES, and the stage controller 10 executes step S6 (FIG. 5).
The stage controller 10 performs this step S6.
It is determined whether the loaded amount has reached 898.5. Note that this judgment is made by comparing the calculated loading amount with the aforementioned liquid supply data 898.5. The same applies below. Loading amount
If it has not reached 898.5, the judgment in step S6 is YES and the process moves to step S7. In this case, the stage controller 10 continues the liquid supply and the loading amount is determined in steps S7 and S8.
Determine whether it has reached 898.5. Loading amount
If it reaches 898.5, the judgment in step S8 is
YES, and the stage controller 10 turns off _V1 in step S9. This reduces the flow rate. Next, the stage controller 10 determines whether the loading amount has reached 998.5 in steps S10 and S11. If the loading amount has reached 998.5, the judgment in step S11 is YES, and the stage controller 10
turns off _V2 in step S12. This closes off the oil transfer path. after that,
1.5 is supplied as an overflow amount, and the loading amount becomes 1Kl. Next, the stage controller 10 notifies the host computer 13 that the emergency stop has been completed and that the loading amount is 1Kl in step S13 (FIG. 4). The host computer 13 displays on the display that the liquid supply has stopped and that the loading amount is 1 Kl, and notifies the staff.

On the other hand, if the judgment in step S6 is NO,
In other words, when the shipment OK signal turns off, the loading amount is
If it is 898.5 or more, the stage controller 10 turns off both V ₁ and V ₂ and stops the liquid supply (step S14). Next, in step S15, the stage controller 10 determines whether or not the loading amount is 990 or more. If it is, the stage controller 10 executes step S13 and then ends the process. On the other hand, if the loading amount is smaller than 990, the stage controller 10 in step S16
Turn on V ₂ and restart liquid supply with a small flow rate (6th
(see figure). Next, the stage controller 10
The loading amount at step S17 and S18 is 998.5
Judgment is made as to whether the target has been reached. Loading amount
If it reaches 998.5, the judgment in step S18 becomes YES, and the stage controller 10
In step S19, _V2 is turned off. After that, 1.5 is supplied as a passing amount, and the loading amount is 1.
Become Kl. Next, the stage controller 10
The process moves to step S13 and notifies the host computer 13 that the emergency stop has been completed and that the loading amount is 1Kl.

The reason for providing the judgment in step S15 is as follows. In other words, if 990 or more is already loaded, the remaining liquid supply amount up to 1Kl is small, so there will be an error in the liquid supply amount due to the residual amount in the pipe, etc., and the loading amount must be exactly 1Kl. This is because it is not possible. However, it is a very exceptional event that the determination at step S15 becomes YES, and it is considered to be extremely unlikely to occur.

On the other hand, the judgment at step S3 in FIG.
In other words, if the loaded amount is not less than 1000, the stage controller 10 moves to step S4 and determines whether the loaded amount is less than 2000. If it is less than 2000, move to Figure 5. Note that the process is substantially the same as the process described above, and its explanation will be omitted. If it is not less than 2,000, the stage controller 10 moves to step S5 and determines whether the loaded amount is less than 3,000. Note that the process when the loading amount is less than 3000 is substantially the same as the process described above, and the explanation thereof will be omitted. Next, the stage controller 10
The process moves to step S20, and it is determined whether the loaded amount is less than 3898.5. If the loaded amount is less than 3898.5, the process moves to step S21. Since this process has already been described, it will be omitted. Loading amount
If it is 3898.5 or more, the loading amount has overflowed. Therefore, the stage controller 10 moves to step S27 and fully closes the metering valve. Next, the stage controller 10 determines that the loading amount is 3990 in step S28.
It is determined whether or not the value is above 3990, and if it is, step S13 is executed to end the process, while if it is less than 3990, only _V2 is opened and loading is performed (step S29). When the loading amount reaches 3998.5, loading is stopped (steps S30, S31, S32). Then,
In step S33, the stage controller enters a standby mode for the next loading operation.

In the above embodiment, the two-stage open/close metering valve is configured with two on-off valves 4 and 5, but this is not limited to this, and a single valve that can be opened half-open and fully opened can be used. It may be controlled in stages.

[Effect of idea]

As explained above, according to this invention, when the shipping OK signal is turned off during the loading operation, the metering valve is fully opened in the first stage when the remaining amount of liquid supplied up to the unit amount of oil supply is less than the predetermined value. Then, the metering valve is opened to a small flow rate to supply liquid. Then, when the loading amount reaches the rated loading amount, the metering valve is closed and fluid supply is stopped, so even if the remaining fluid supply amount up to the unit oil supply amount is less than the predetermined value, It is no longer necessary to manually supply additional liquid as in the past, reducing working time and avoiding risks associated with additional liquid supply.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a schematic configuration of a liquid supply system equipped with a metered liquid supply device according to an embodiment of this invention, Fig. 2 is a front view showing a remote control box, and Figs. are graphs showing changes in flow rate when loading 1Kl, 2Kl, and 4Kl, respectively; Figures 4 and 5 are flowcharts showing the operation of the stage controller when the shipping OK signal is interrupted; Figure 6 is a flowchart showing the operation of the stage controller when the shipping OK signal is interrupted. Graphs 7 and 8 each showing an example of a change in flow rate when the OK signal is interrupted are graphs showing changes in flow rate. 3... Flow meter, 4, 5... On-off valve (metering valve),
10...Stage controller (measuring means, first
judgment means, valve fully closing means, valve opening means, second judgment means, valve closing means), 13... host computer (output means).

Claims (1)

[Scope of utility model registration request] An output means that confirms that the interlock condition is released during loading work and outputs a shipping OK signal, a flowmeter inserted in the liquid transfer path, and a flow rate pulse output from this flowmeter. In a metering liquid supply device comprising a measuring means for measuring the loading amount and a metering valve inserted in the transfer path and closing in two stages, during loading of the liquid, the shipping OK is output from the output means. When the signal is turned off, the amount of cargo weighed by the weighing means is
The first step is to determine whether or not the loading amount is greater than the value obtained by subtracting a predetermined residual liquid supply amount from the unit liquid supply amount.
a valve fully closing means for fully closing the metering valve in one stage when the first determining means determines that the loading amount is greater than the subtracted value; a valve opening means for opening the metering valve to a small flow rate state after the metering valve is closed by the valve full closing means; and a metering means when the metering valve is opened by the valve opening means. A second step for determining whether the loading amount measured by
and a valve closing means for closing the metering valve when it is determined by the second determining means that the loading amount has reached a value obtained by subtracting the predetermined overflow amount. A quantitative liquid supply device characterized by: