JPH02282099A - Oil feed system - Google Patents

Abstract

PURPOSE:To prevent an accidental idle running of a pump by always monitoring the amount of the remaining oil in an underground tank and automatically bringing weighers in a pump lock condition before the oil remaining amount reaches a dangerous level. CONSTITUTION:Based on the judgement that the remaining oil in an underground tank 8 is decreased to the amount not more than the preset, a computing means of a common control part 2 computes an estimated total sum of the oil feed amount estimated by an oil supply weigher 5 for feeding oil from the tank 8 and the oil feed amount estimated by a feed start demanding weigher 6. When the estimated total sum exceeds the oil feed capacity of the underground tank 8, a pump lock means for the common control part 2 brings the oil feed start demanding weigher 6 in a pump lock condition and a warning means 4 gives a warning that the remaining amount of the oil in the underground tank 8 is not more than the preset amount. By this system, the occurrence of the idle running and hence the lock of a pump can be prevented, thereby permitting a smooth oil feed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refueling system applied to a refueling station, and more particularly to a refueling system suitable for use in preventing idling accidents of pumps of measuring machines.

[Prior art and issues] Continuation of refueling work, that is, continued operation of the refueling pump, when the remaining amount of oil stored in an underground tank that supplies oil to a metering machine at a gas station is zero or below a limit value. This causes the fuel pump to run idly, causing a malfunction that can lead to malfunction.

Conventionally, in order to prevent the above-mentioned pump idling accident, refueling personnel have inserted a gauge for detecting stored oil into underground tanks to check the remaining amount of oil.

However, with the above-mentioned method of checking the amount of oil remaining in an underground tank using a gauge, it is necessary to perform the checking from time to time in order to prevent pump idling accidents, which is time-consuming and complicated, and is labor-saving. There were also problems from the perspective.

The present invention solves the above problem by constantly monitoring the remaining amount of oil in an underground tank, and detecting the amount of oil remaining in the underground tank before the remaining amount reaches a dangerous level.
The objective is to provide a refueling system that prevents pump idling accidents by automatically placing the pump in a pump lock state.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a measuring machine having a refueling pump for pumping up oil, a tank for storing oil to be supplied to a plurality of measuring machines, and a residual amount measuring means for measuring the remaining amount of oil in the tank; a determining means for determining whether the remaining amount of oil in the tank measured by the residual measuring means is less than or equal to a preset amount; a registration means for registering an estimated amount of refueling for a predetermined refueling direction for each measuring machine, and based on the registration of the registration means, oil liquid is supplied from a tank in which the residual oil 1 is determined to be less than or equal to a set amount by the determination means. a calculation means for calculating the total estimated amount of refueling by adding the estimated amount of refueling of the measuring machine that has outputted the refueling start request to the estimated amount of refueling of all the measuring machines during refueling; and the total refueling amount calculated by the calculating means. If the estimated amount exceeds the amount of oil that can be supplied from the tank in which the remaining amount of oil is determined to be less than or equal to the set amount, the oil supply pump of the metering machine that has outputted the refueling start request is placed in a lock state jf3, and the oil supply pump is locked. The pump is characterized by comprising: a pump lock means for preventing the oil from idling; and a notification means for notifying that the remaining amount of oil in the tank has become less than a set amount.

[Operation] According to the present invention, based on the determination that the remaining 1111 liquid in the tank is below the set amount, the calculation means or the estimated amount of oil to be supplied by the Uchinaka weighing machine that supplies oil from the tank is calculated. , Refueling start request needle ■ When the total estimated amount of refueling is calculated by adding the estimated amount of refueling of the machine, the pump lock means will turn the refueling start request needle when the total estimated amount of refueling exceeds the amount of oil that can be supplied in the underground tank. In addition to locking the pump of one aircraft, the notification means notifies the refueling man that the remaining amount in the tank has become less than the set amount.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of the refueling system of this embodiment. A refueling station building 1 is installed on the refueling station site, and a common control unit 2 is installed inside the building 1 to control each part of the refueling system. and an indoor display board 3 equipped with an empty lamp and a pump idling prevention error lamp (illustrated path) to indicate that the remaining amount of oil in the underground tank has fallen below the empty value, which will be described later, and the remaining amount of oil in the underground tank. A sound generating device 4 is provided which generates a lubrication alarm when the lubrication temperature reaches an empty value. In this case, the common control unit 2 includes the weighing machine number for each underground tank piping system, the average amount of refueling per vehicle for each weighing machine (estimated amount of refueling, for example, the amount of regular gasoline/high-octane gasoline to be supplied in ljt). 40g for a machine,
70Q in the case of a measuring machine that supplies light oil, 18c in the case of a total of 1 machine that supplies kerosene), and an operation display section (illustrated path) for inputting the empty value and limit value, etc. described later for each underground tank. It is arranged. These manual operations are
This is performed as an initial data setting operation when installing the gas station, and is stored in a fuel management table to be described later.

In addition, there are no.
Weighing machines 5, . An underground tank 8 is buried, and a liquid level gauge 9 for measuring the remaining amount of oil is provided in the underground tank 8. In this case, in this embodiment, for convenience, only two measuring machines and one underground tank are shown, but the filling station has multiple measuring machines that supply oil liquid of a different oil type from the above-mentioned oil type. machine (NO, s++1 machine ~ NO,
Machine No. Also,
These weighing machine numbers are determined when wiring work for each underground tank is performed.

The measuring machine 5 of the NO. A pipe line 1 for transferring the oil pumped up by the pump 10
A flow meter 13 is disposed in the middle of the supply 1111 to measure the flow rate of the supply 1111. A refueling hose 14 is disposed on the oil discharge side of the pipe 12, and a refueling nozzle 15 attached to the tip of the refueling hose 14 is a nozzle hook (not shown).
It is said that it is possible to escape. The nozzle hook is connected to the nearby weighing machine 5.
A nozzle switch 16 is arranged inside, and the refueling nozzle 1
5 is turned ON when removed from the nozzle hook, and turned OFF when hooked back. Further, the weighing machine 5 is provided with a control section 17, which controls the pump motor 1.
At the same time, the amount of refueling is measured based on the output signal of the flow meter 13, and a refueling start request signal is output to the common control section 2 based on the ON signal of the nozzle switch 16. Additionally, the weighing machine 5 has a display (not shown) that displays messages such as "Underground tank empty".
is installed.

In addition, the weighing machine 6 of NO, m machine and the pond weighing machine (NO0I
Each part of the weighing machine 11+1 to No. 11+1 to No. Also, other underground tanks (N.

2 to No. n) also have the same configuration as the underground tank 8. The common control unit 2 of the gas station building 1 and the control unit 17 of each weighing machine (No. 1 machine to No. x machine)
And each underground tank (No. 1 to No. n>) is connected to each i&plane meter 9 through a serial interface.

The common control unit 2 continuously scans the current remaining amount of oil stored in each underground tank based on the detection signal of each night sales account 9, and determines when the remaining amount in any underground tank reaches an empty value as described below. It is designed to monitor whether or not it has been completed.

Furthermore, as shown in FIG. 2, stored within the memory of the common control unit 2 of the gas station building 1 is a refueling management table 22 consisting of an oil amount table 20 and a refueling meter table 21.

That is, each area 20A, 20B of the oil amount table 20
, 20C each have underground tanks (NO, 1 to NO, n
) current remaining amount of stored oil liquid! (A), empty value of each underground tank (B), which is the standard for starting a lubrication alarm, and limit value (C) of each underground tank, where pump idling of the metering machine occurs.
) are now memorized.

In addition, each area 21Δ of the refueling measuring machine table 21
, 21B, . . . 21X, each of the first areas 21-1 has a weighing machine No. connected to each underground tank by piping.
are initially set, and each of the areas 21A, 21B,
...In each second area 2I2 of 21X, there is a refueling possible/inhibited flag F ("1" - Chiura possible, "0" - refueling amount) is set, and the average refueling ff1 (D) during normal refueling and the setting during preset refueling are set in the 3rd T-'J 7213 of each area 2 LA, 21 B, -21x, respectively. The preset oil supply fft(D') is stored.

In this case, the average oil supply amount (D) is set for the bright period from the operation display section of the common control section 2 depending on, for example, the oil type, the location of the metering well, etc.
t (D') is set to a desired oil supply amount that is set and input at the time of preset oil supply. Note that during normal refueling, the preset oil amount (D') - 0 is set.

The common control unit 2 refers to the stored contents of the refueling management table 22 and performs the following processing. In other words, ■ Lubricating fft
Based on the formula (X) - Current remaining amount (A) - Limit value (C), calculate the amount of oil that can be filled into the underground tank, and also calculate the oil filling position (X) obtained in ,・The total amount of refueling E (the following formula) of the measuring machine whose refueling permission flag F is set to "1" and refueling is already permitted in response to a refueling start request, E= (D+orD%) + (D ,orD,')+・-
+(DnorDn') (However, in the above formula, if normal refueling is permitted for a weighing machine for which refueling is already permitted, average refueling ff1D is calculated, and brisse is calculated.

(If permission has been granted for lubrication, the brissate lubrication amount D' is individually selected and calculated)
An inequality (the following formula) showing the relationship between orD'D' and (D'D' is the preset value when the preset value data is not "0" and preset lubrication is specified in the above report) (X) > GE) + (DDorD'D') ( If X) is satisfied, the refueling permission flag F is set to "1" for the weighing machine, while if (X) does not satisfy the above formula, the refueling permission flag F is set to "1°°". It is set not to be changed to .

Next, the operation of this embodiment with the above configuration will be explained in FIGS. 3 and 4.
This will be explained based on the flowchart shown in the figure.

Underground tank empty monitoring process (Fig. 3) After performing initialization processing to set the tank number to m=1 (step 5AQ), the common control unit 2 monitors the NO, l underground tank 8 detected by the liquid level gauge 9. It is determined whether the remaining amount of oil is less than the empty value read from area 20B of the oil supply management table 22 (Step SΔ1). If the remaining amount of oil is not less than the empty value, the corresponding NO.
, 1 underground tank 8 is subjected to the pump idling process shown in FIG. 4 (step 5A2). On the other hand, if the remaining oil fluid is below the empty value, the empty lamp on the indoor display board 3 is turned on and the fueling man is informed that the remaining amount in the underground tank (NO, l underground tank 8) is below the empty value. It notifies the fuel tanker that the level is below the level below and urges the refueling man to refuel the underground tank (underground tank 8) from the tanker truck (step 5A3). Next, the common control unit 2 determines whether or not the sound generation device 4 has been reset (step 5A4), and if it has not been reset, the sound generation device 4 causes the remaining amount of the underground tank (NO, ] underground tank 8) to be reset. It is notified for a predetermined time that the amount is below the empty value (step 5A5).

On the other hand, if the remaining amount of oil in the underground tank 8 is equal to or greater than the empty value, step SA2 is determined.
After completing the idle management process described below for the tank No. 1, add 1 to the tank No. and update it to the next tank No. (m = 2).
It is determined whether or not m-2) is greater than the number of installed tanks (m=X) and all the tanks have been confirmed or not (step SA6.7). Then, update the tank No. (
If m=2) is less than or equal to the number of installed tanks It is determined whether the remaining amount of oil is below the empty value (step 5AI), and if the remaining amount of oil is not below the empty value, the pump idle process shown in FIG. 4 is performed for the N02 underground tank (step 5A2). After this,
Step 7” Performs processing of SA6.7.

On the other hand, if the remaining amount of oil in the No. 2 underground tank is below the empty value in step SA1, then No. 2
After performing steps SA3 to SA5 described above for the underground tank, step SA6.7 is similarly performed. Therefore, by the process of step SA6.7, the tank N
While updating o sequentially, underground tank empty monitoring processing is also performed for the other remaining tanks, and the above steps are performed.

When the tank number (m) exceeds the number of installations X in step SA7, the process returns to step SAO, whereupon the tank number is initialized to "l" again and the underground tank empty monitoring process is executed again.

Pump idle management process (FIG. 4)> The pump idle management process is executed after step SAI of the underground tank empty monitoring process is completed.

The common control unit 2 controls the control unit 17 of the weighing machine as shown in FIG. 5 (for example, 4
Determine whether a refueling start request report configured in byte format has been received (Step 5BI)
. When the refueling start request report is received, it is determined whether the refueling by the weighing machine is in the preset mode or not, based on whether the preset value data of the refueling start request report is "0", that is, normal refueling is not in place.Step 5B2 ), if not preset mode lubrication, lubrication management table 22
The average fuel supply ff1(D) is read from the third area 21-3 corresponding to the weighing machine in question, and the average fuel supply ff1(D) is (
DD) (Step 5B3).

Next, in the refueling management table 22, select the weighing machine connected to the same tank 8 that has already received refueling, that is, the weighing machine whose refueling permission/inhibition flag F in the second area 21-2 is "1". , for each selected aircraft, if preset refueling has been accepted, the preset refueling ID stored in the third area 21-3, or if normal refueling has been accepted, the third area Read the average refueling ff1D stored in 21-3, and calculate the total refueling amount of the weighing machines for which refueling has already been accepted (E) - (D, orD,)
After calculating +, (DtorDt) +・-+ (DnorDn) (step 5B4), the oil supply management table 2
Current remaining ff1 read from each area 2OA, 20C corresponding to the underground tank that supplies oil to the relevant measuring machine in No.2
Based on (A) and the limit value (C), the amount of oil that can be filled into the underground tank ff1 (X) - (A) - (C)
is calculated (step 5B5). Furthermore, the oil supply amount ff1
(X), the total amount of refueling (E), and the average amount of 71 tl (
Calculate the magnitude relationship with the added value (E) + (DD) of Dig, that is, determine whether or not to refuel (Step 5B6)
.

Next, it is determined whether the refueling amount (X) is a dog based on the addition value (E) + (DD).Step 5B7) Dog (refueling amount)
If it is determined, the M1 availability flag F in the second area 21-2 corresponding to the weighing machine in the refueling management table 22 is set to "
1'' (step 5B8), and since this is normal lubrication, preset lubrication jil (D'') = 0 is stored in the third area 21-3 (step 5B9).
). After this, the common control unit 2 sends a “refueling amount” command to the control unit 17 of the weighing machine (step S B 1
0), the process ends.

On the other hand, if the common control unit 2 does not receive a refueling start request report from the weighing machine in step SBI, it determines whether or not it has received a refueling completion report configured in a predetermined format from the weighing machine (step SBI). 5BI
I). When the refueling completion report is received, it is determined whether the refueling completed by the weighing machine is preset mode refueling or not (step S B 12). If the refueling is preset mode refueling, the third area 21- of the refueling management table 22 is sent.
After storing the preset supply m1ffi (D') = O in 3 (step S B 13) and resetting the refueling permission/inhibition flag F in the second area 21-2 to "0" (step 5BI4), the process end. On the other hand, if the refueling completion report is not received from the weighing machine in step 5BII, the process is terminated;
If the refueling completed by the weighing machine in B12 is preset mode refueling, step 5B14 is executed, and then the process ends.

On the other hand, if the refueling by the weighing machine is in the preset mode in step SB2, the common control unit 2 performs the same process as step SB4 and step SB5 (step 5B15, step S816). Furthermore, an additional value ((E )+(received preset refueling amount)), that is, it is determined whether refueling is possible or not (step 5B).
17).

Next, in step S, it is determined whether the refueling amount (X) is larger than the additional value ((E) + (received preset refueling amount)).
B18) If it is determined that the amount of oil supplied is large, the same process as step SB8 above is performed, and (step SB
19), third area 21-3 of refueling management table 22
The received preset oil supply 1t(D') is stored in (Step S B 20). Thereafter, the common control section 2 sends a "refueling possible" command to the control section 17 of the weighing machine (steer knob 5B21), and then ends the process.

On the other hand, the common control unit 2 determines in step SB7 and step 5Bi8 whether the amount of oil to be supplied to the weighing machine is 1t(X) or the additional value ((E)+(DD) or (E)+(received preset amount of oil to be supplied)) ) In the following cases, send the "bon plotter" command to the weighing machine and (step 5B)
22), Sends the "Underground Tank Empty" display command. As a result, "Underground Tank Empty" is displayed on the display (illustrated path) of the weighing machine (Step 5B23). Next, the pump on the indoor display board 3 is displayed. Turn on the idle rotation prevention error lamp (step 5B2)
4) After the sound generating device 4 notifies the pump idling prohibition error for a predetermined period of time (step 5B25), the process ends.

After the pump idling management process is completed, the processes from step SA3 onward of the underground tank empty monitoring process are performed.

[Modification] ■In the above embodiment, the same oil type was supplied from one underground tank to m measuring machines, but in this case,
For example, at a filling station where oil of the same type is supplied from one underground tank to four weighing machines, the remaining amount in the one underground tank is the amount of oil that is supplied to three or five weighing machines. When it is determined that there is only a certain amount, it is also possible to set three measuring machines to refuel and prohibit the remaining one from refueling. This makes it possible to achieve efficient operation of the weighing machine.

(2) In the above embodiment, the common control section is configured to control each part of the refueling system using a polling method, but the common control section is not limited to this, and it is also possible to control using a contention (mutual activation) method.

■In the above embodiment, the configuration is such that the common control unit monitors the pump idling of each weighing machine, but the configuration is not limited to this. For example, a specific weighing machine among a plurality of weighing machines is used as a master unit, and refueling management is performed. It is also possible to provide a memory having a table and monitor the pump idling of each weighing machine using the weighing machine of the parent unit.

[Effects of the Invention] As explained above, according to the present invention, there is provided a measuring machine having a refueling pump for pumping up oil, a tank for storing oil to be supplied to a plurality of measuring machines, and an amount of oil in the tank. a remaining amount measuring means for measuring 1; a determining means for determining whether the remaining amount of oil in the tank measured by the remaining amount measuring means is less than or equal to a preset setting of 1; a registration means for registering an estimated amount of refueling for each aircraft; and a refueling system in which oil is supplied from a tank whose remaining amount of oil is determined to be less than or equal to a set amount by the determination means based on the registration of the registration means. a calculation means for calculating the total estimated amount of refueling by adding the estimated amount of refueling of the measuring machine that has outputted the refueling start request to the estimated amount of refueling of all the measuring machines; If the remaining amount of oil exceeds the oil supply capacity of the tank that is determined to be less than the set amount, the oil supply pump of the measuring machine that outputs the refueling start request is locked to prevent the oil supply pump from idling. Since the configuration includes a pump locking means for activating the pump, and a notifying means for notifying that the remaining amount of bi in the tank has become less than or equal to the set amount, the following effects can be achieved.

■The remaining amount of oil in the tank is constantly monitored and the meter automatically locks the pump before the remaining amount reaches a dangerous level, which prevents the pump from idling like in the past. can.

■Since the amount of oil remaining in the tank is constantly monitored, the metering machine will not lock up the pump while refueling the vehicle, allowing for smooth refueling operations.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of a refueling system according to an embodiment of the present invention, Figure 2 is a conceptual diagram showing the configuration of a refueling management table according to this embodiment, and Figure 3 is an underground tank empty monitoring system according to this embodiment. FIG. 4 is a flowchart of the process, and FIG. 4 is a flowchart of the pump idle management process of this embodiment, and FIG. 5 is a conceptual diagram showing an example of the refueling start request report format of this embodiment. 2...Common control unit (determination means, calculation means, pump lock means), 4...Audio generator (notification means), 5.6...Total 1 unit, 8...Underground tank (tank), 9...Liquid level gauge (remaining amount measuring means), 10...Pump (refueling pump), 22...
... Refueling management table (registration means).

Claims (1)

[Scope of Claims] A measuring machine having an oil supply pump for pumping up oil liquid, a tank for storing oil liquid to be supplied to a plurality of measuring machines, a residual amount measuring means for measuring the remaining amount of oil liquid in the tank, A determining means for determining whether the remaining amount of oil in the tank measured by the remaining amount measuring means is less than or equal to a preset amount, and registering for each measuring device the estimated amount of oil to be supplied per predetermined amount of oil by the measuring device. a registration means; and, based on the registration of the registration means, refueling is started based on the estimated amount of refueling of all the measuring machines being refueled, which are supplied with oil from the tank whose remaining amount of oil is determined to be less than or equal to a set amount by the determining means. a calculating means for calculating a total estimated amount of oil to be supplied by adding the estimated amount of oil to be supplied from a measuring machine that has outputted a request; If the amount of oil that can be supplied from the tank is exceeded, the pump lock means locks the oil pump of the measuring machine that outputs the refueling start request to prevent the oil pump from idling; 1. A refueling system comprising: a notification means for notifying that the amount of fuel has fallen below a set amount.