JP3463470B2 - Refueling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submerged pump provided in an oil storage tank, a leak detection valve provided in the discharge pipe of the submerged pump, and a plurality of branch pipes connected to the discharge pipe. The present invention relates to a refueling device including a weighing machine.

[0002]

2. Description of the Related Art A submerged pump provided in an oil storage tank, a leak detection valve provided in a discharge pipe of the submerged pump, and a weighing machine connected to each of a plurality of branch pipes of the discharge pipe. The leak detection valve used in the oil supply device described above, for example, as shown in JP-A-8-34498, flows only for a certain period of time from the driving of the submerged pump to the opening of the leak detection valve, for example, 3 seconds. If there is no oil flow to the outlet side, the leak detection valve opens and a large flow path is secured, but if there is oil flow to the outflow side during that time, the leak detection valve does not open and only the small flow path is held. What is done is being used.

This lubrication control device for a weighing machine receives a lubrication signal output by a refueling start operation and outputs a lubrication request signal to the drive control device for the submerged pump, and after a certain time from this, it is provided on the lubrication pipe of the weighing machine. By outputting a valve opening signal to the open / close valve, the leak detection valve can be reliably opened as long as there is no damage to the piping.

When the weighing machine is refueling and the submerged pump is driven, the leak detection valve is already open, and the next weighing machine may immediately open the open / close valve to refuel. As described above, also in this case, the open / close valve is opened after a certain time to refuel. The fixed time until the leak detection valve is opened is a mere 3 seconds, but is a dead time that is felt long by a person who is performing refueling work.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, when the submerged pump is already driven, the next weighing machine immediately opens the open / close valve to allow refueling.
An object of the present invention is to provide a refueling device that can improve work efficiency.

[0006]

To achieve the above object, the present invention provides a submerged pump provided in an oil storage tank, a leak detection valve provided in a discharge pipe of the submerged pump, and a discharge valve. In a fueling device composed of a weighing machine connected to each of a plurality of branch pipes of the pipe, the leakage detection valve is large if there is no oil flow to the outlet side for a certain period of time after the submerged pump is driven. When the flow path is secured and there is oil flow to the outlet side, only the small flow path is retained.The oil supply control device of the weighing machine receives the oil supply signal output by the oil supply start operation. It outputs a refueling request signal to the pump drive control device of the submerged pump, receives a valve opening permission signal from the pump drive control device, and outputs a valve opening signal to the opening / closing valve provided in the oil supply pipe of the weighing machine,
The pump drive control device of the submerged pump outputs a drive signal to the submerged pump in response to a lubrication request signal from the weighing machine, and after a certain time after outputting the drive signal, opens the valve to the lubrication control device of the weighing machine. The permission signal is output.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. As shown in FIG. 1, an oil storage tank 1 is provided underground of a gas filling station, and the oil storage tank 1 is provided with a submerged pump 2 and an oil supply pipe 3 for supplying oil from a tank truck.

A leak detection valve 4 is provided at the outlet of the submerged pump 2. As described above, the leak detection valve 4 opens a large flow path by opening the valve if there is no oil flow to the outlet side for a certain time after the submerged pump 2 is driven. A valve is used in which the valve does not open when there is an oil flow to the outlet side and only a small flow path is held.

The discharge pipe 5 of the submerged pump 2 is branched into a plurality of branch pipes 7A, 7B ...
A, 10B ... Oil supply pipes 11A, 11B.

An on-off valve 1 is provided on the oil supply pipe 11A of the weighing machine 10A.
2 and the flow meter 13 are interposed, and a hose 16 having a refueling nozzle 15 attached to the tip thereof is connected to the refueling nozzle 15
A nozzle switch 17 is provided for the nozzle hook for hanging. Refueling control device 20 provided in this weighing machine 10A receives a refueling signal from nozzle switch 17 and resets the previous refueling amount displayed on indicator 19 to a pump which will be described later with a refueling request signal. It outputs to the drive control device 30, receives the valve opening permission signal from the pump drive control device 30, and outputs the valve opening signal to the opening / closing valve 12. During refueling, it has a function of counting the pulses from the flow rate pulse transmitter 14 of the flow meter 13 and displaying the amount of refueling on the display meter 19.

The other weighing machines 10B ...
The structure is the same as that of 0A, and the description thereof is omitted.

On the other hand, in the office, there is provided a pump control device 30 which is connected to the submerged pump 2 and the weighing machines 10A, 10B, ...

As shown in FIG. 2, the refueling control device 20 of the weighing machine receives the refueling signal output from the nozzle switch 17 in the refueling start operation for removing the refueling nozzle 15 from the nozzle hook, and resets the previous count value to zero. Then, the flow rate signal from the flow rate pulse transmitter 14 of the flow meter 13 is counted and the counting means 21 for transmitting this count value to the display 19 and the pump drive control device 30 of the submerged pump 2 for receiving the refueling signal are refueled. Refueling request signal output means 22 for outputting a request signal and deactivating the refueling request signal when the refueling signal output from the nozzle switch 17 is erased by the refueling end operation of hanging the refueling nozzle 15 on the nozzle hook, and the refueling signal. And a valve opening permission signal from the pump drive control device 30 outputs a valve opening signal to the opening / closing valve 12 and erases the valve opening signal by deleting the refueling signal. It is equipped with.

Further, the pump drive control device 30 of the submerged pump 2 receives the lubrication request signal from the lubrication control device 20 of each of the weighing machines 10A, 10B, ... And outputs a drive signal to the submerged pump 2. Submerged pump 2 when refueling request signals from all weighing machines are deactivated
Drive drive determining means 31 for erasing the drive signal to the submerged pump 2, and a certain time after the pump drive determining means 31 outputs the drive signal to the submerged pump 2, the valve opening permission signal is sent to each of the weighing machines 10A, 10B ... Output to the refueling control device 20 of the above, and the valve opening permission signal output means 32 for deactivating the valve opening permission signal when the drive signal to the submerged pump 2 is erased.
And a time measuring means 33 for measuring a fixed time until the valve opening permission signal is output.

Next, the operation of the oil supply system will be described with reference to FIGS.

When a refueling start operation is carried out by removing the refueling nozzle 15 of the weighing machine 10A from the nozzle hook for refueling, a refueling signal is input from the nozzle switch 17 to the refueling control device 20 (ST1 in FIG. 3). Then, the previous count value counted by the counting means 21 is reset to zero, the display of the indicator 19 is reset to zero, and the refueling request signal output means 22 outputs a refueling request signal to the pump drive control device 30 (Fig. 3 ST
2).

The pump drive determination means 31 of the pump drive control device 30 to which the refueling request signal is input from the weighing machine 10A (ST1 in FIG. 4) does not output the drive signal to the submerged pump 2 (ST2 in FIG. 4). ), And outputs a drive signal to the submerged pump 2 (ST in FIG. 4).
3). Then, the submerged pump 2 is driven, and the oil in the oil storage tank 1 is pumped. At this time, if there is no liquid leakage due to breakage of the discharge pipe 5 and the branch pipes 7A, 7B ... And no flow to the discharge pipe 5 side occurs, the leak detection valve 4 opens in about 2 seconds, and the large flow path Is secured. And for a certain time,
For example, when 3 seconds is timed by the time measuring means 33 (see FIG.
(T4), the valve opening permission signal is output to the oil supply control devices 20 of all the weighing machines (ST5 in FIG. 4), and the process returns.

The opening / closing valve driving means 23 of the fuel supply control device 20 to which the valve opening permission signal is input from the pump control device 30 (see FIG.
ST3), and outputs a valve opening signal to the on-off valve 12 (S in FIG. 3).
T4), the on-off valve 12 opens.

Pulse transmitter 1 of flow meter 13 according to refueling
The flow rate pulse from 4 is input to the counting means 21 (see FIG.
At T5), the counting means 21 counts the flow rate pulse, transmits the count value to the display 19 (ST6 in FIG. 3), and the amount of oil supply is displayed on the display 19.

When refueling is completed and the refueling end operation is performed by hanging the refueling nozzle 15 on the nozzle hook, and the refueling signal from the nozzle switch 17 is erased (ST7 in FIG. 3), the on-off valve 12
The valve-opening signal that has been output to is deleted, the on-off valve 12 is closed, and the refueling request signal that has been output to the pump drive control device 30 is deactivated (ST8 in FIG. 3).

The pump drive judging means 31 of the pump drive controller 30 in which the refueling request signal from the weighing machine 10A is deactivated (ST6 in FIG. 4), when the refueling request signals from all the weighing machines are deactivated. (FIG. 4, ST7), the drive signal to the submerged pump 2 is erased, the submerged pump 2 is stopped, and the valve opening permission signal output to the lubrication control devices 20 of all the weighing machines is deactivated (FIG. 4). 4 ST8).

The above description is for the case where only one weighing machine 10A refuels, but the refueling nozzle 15 of the weighing machine 10B is removed during refueling, and the refueling signal is sent from the nozzle switch 17 to the refueling control device 20. When input (ST1 in FIG. 3), the display on the display 19 is reset to zero, and a refueling request signal is output to the pump drive control device 30 (ST2 in FIG. 3). Then, at this time, since the valve opening permission signal has already been input from the pump drive control device 30 (ST3 in FIG. 3), the valve opening signal is output to the on-off valve 12 after a certain period of time (ST4 in FIG. 3),
The on-off valve 12 opens immediately. In this way, refueling of the next weighing machine can be started immediately while refueling with another weighing machine.

On the other hand, the pump drive control device 30 to which the refueling request signal is input from the weighing machine 10B (ST1 in FIG. 4) has already output the drive signal to the submerged pump 2 (ST2 in FIG. 4). The process returns without executing ST3 to ST5.

According to the refueling, the refueling amount is displayed on the display 19 (ST5, ST6 in FIG. 3), and when the refueling is finished, the refueling nozzle 15 is hooked on the nozzle and the refueling signal from the refueling switch 17 is erased (ST7 in FIG. 3). ), The on-off valve 12 is closed, and the refueling request signal output to the pump control device 30 is deactivated (ST8 in FIG. 3).

When the refueling request signal from the weighing machine 10B is deactivated (ST6 in FIG. 4), if the weighing machine 10A is still refueling at this time (ST6 in FIG. 4).
7), the process returns without executing ST8 of FIG.

[0026]

As described above, according to the present invention, a submerged pump provided in an oil storage tank, a leak detection valve provided in a discharge pipe of the submerged pump, and a plurality of branch pipes of the discharge pipe are provided. In the oil supply device composed of the weighing machines connected to each other, the leakage detection valve secures a large flow path if there is no oil flow to the outlet side for a certain period of time after the submerged pump is driven. When there is a flow of oil to the outlet side, only the small flow path is held, and the lubrication control device of the weighing machine receives the lubrication signal output by the lubrication start operation and sends the lubrication request signal to the submerged pump. Output to the pump drive control device of the sub-merged pump, and upon receiving the valve open permission signal from the pump drive control device, output the valve open signal to the open / close valve provided in the oil supply pipe of the weighing machine, The device receives the refueling request signal from the weighing machine, outputs a drive signal to the submerged pump, and outputs a drive signal to the refueling control device of the weighing machine a fixed time after outputting the drive signal. When the bull pump is already driven, the opening and closing valve of the next weighing machine opens immediately to allow refueling, eliminating unnecessary waiting time.
Work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an overall view for explaining an oil supply device of the present invention.

FIG. 2 is a block diagram of a control device of the oil supply device of the present invention.

FIG. 3 is a flow chart of the oil supply control device of the present invention.

FIG. 4 is a flowchart of the pump control device of the present invention.

[Explanation of symbols] 1 oil storage tank 2 submerged pumps 3 lubrication pipe 4 Leakage detection valve 5 discharge pipe 7A, 7B Branch pipe 10A, 10B weighing machine 11A, 11B Oil supply pipe 12 open / close valve 13 Flowmeter 14 Flow rate pulse transmitter 15 Refueling nozzle 16 hoses 17 nozzle switch 19 Display 20 Refueling control device 21 counting means 22 Refueling request signal output means 23 Open / close valve drive means 30 Pump drive controller 31 Pump drive determination means 32 Valve opening permission signal output means 33 Timekeeping means

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-8-34498 (JP, A) JP-A-47-19401 (JP, A) JP-A-7-137800 (JP, A) JP-A 64-- 58699 (JP, A) Actual development 60-2698 (JP, U) Actual development 1-132598 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B67D 5/00

Claims (2)

(57) [Claims] 1. A submerged pump provided in an oil storage tank, a leak detection valve provided in a discharge pipe of the submerged pump, and a weighing machine connected to each of a plurality of branch pipes of the discharge pipe. In the oil supply device described above, the leakage detection valve secures a large flow path if there is no oil flow to the outlet side for a certain period of time after the submerged pump is driven, and there is oil flow to the outlet side. And only a small flow path is held, the refueling control device of the weighing machine outputs a refueling request signal to the pump drive control device of the submerged pump in response to the refueling signal output by the refueling start operation, Upon receiving a valve opening permission signal from the pump drive control device, the valve opening signal is output to the opening / closing valve provided in the oil supply pipe of the weighing machine,
The pump drive control device of the submerged pump outputs a drive signal to the submerged pump in response to a lubrication request signal from the weighing machine, and after a certain time after outputting the drive signal, opens the valve to the lubrication control device of the weighing machine. A refueling device that outputs a permission signal. 2. The refueling control device of the weighing machine receives a refueling signal by a refueling start operation and outputs a refueling request signal to a pump drive control device of the submerged pump, and a refueling request is made by erasing the refueling signal by a refueling end operation. A refueling request signal output means for deactivating the signal, a refueling signal by a refueling start operation, and a valve opening permission signal from the pump drive control device to output a valve opening signal to the on-off valve, and when the refueling signal is deleted, a valve opening signal The pump drive control device of the submerged pump outputs a drive signal to the submerged pump in response to a lubrication request signal from the lubrication control device of the weighing machine, and outputs all the weighing fluid. A pump drive determination means for deleting the drive signal when the refueling request signal from the machine is deactivated, and after the pump drive determination means outputs the drive signal to the submerged pump A valve opening permission signal output means for outputting a valve opening permission signal to the fueling control device of the weighing machine after a fixed time and deactivating the valve opening permission signal when the drive signal to the submerged pump is deleted. The refueling device according to claim 1.