JP3716485B2 - Lubrication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an oil supply device that allows oil in a plurality of oil storage tanks to be used evenly, and in particular, submerged pumps provided respectively in the oil storage tanks are connected to a plurality of measuring machines via a common oil supply pipe. The present invention relates to a fueling device.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 64-23998 discloses an oil that can be used evenly in each oil storage tank of a gas station. This is effective in that each oil storage tank is connected by a siphon tube so that there is no difference in liquid level, and the oil in each oil storage tank is used equally, but a separate siphon tube is provided. There is a disadvantage that it is necessary and expensive. In addition, the siphon action is stopped when oil is supplied to the oil storage tank, and the siphon action is activated again after the replenishment is completed.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide an oil supply device that eliminates the disadvantages of the conventional example, does not require separate piping, and can use oil in each oil storage tank evenly without taking a complicated structure.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention connects the discharge pipes of the submerged pumps provided respectively to the plurality of oil storage tanks to a common oil supply pipe, and connects the inflow pipes of a plurality of measuring machines to the oil supply pipe. In the oil supply apparatus provided with a pump control device that drives a submerged pump in response to an oil supply request signal from the machine, each of the oil storage tanks is provided with a liquid level gauge, and the measurement signal of the liquid level gauge is a liquid level gauge control device is input to the pump controller receives the liquid amount signal from the level gauge controller, submerged Bull pump provided in the large oil storage tank of liquid volume comprises a pump drive means for driving preferentially, the The pump control device includes a drive number determination means for determining the number of submerged pumps to be driven according to the number of oil supply request signals input from each of the measuring machines, and a liquid amount signal from the liquid level meter control device. And a priority drive determination means for determining a submerged pump to be used with priority. The pump drive means has a priority determined by the priority drive determination means for the number of submerged pumps determined by the drive number determination means. The gist is to drive in order.
[0005]
According to the present invention, the pump drive means drives the number of submerged pumps determined by the drive number determination means in the priority order determined by the priority drive determination means. It is possible to optimally control a plurality of submergible pumps so that the oils are equally used.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a plurality of oil storage tanks T1, T2,... Are provided in the basement of the gas station, and these oil storage tanks send oil to a plurality of measuring machines 20, 20,. A submerged pump 2, a liquid level gauge 3 for measuring the liquid level in the oil storage tank, and an oil supply pipe 4 for replenishing oil from a tank truck are provided, and a metering machine 20 for supplying oil to the automobile on the island 5 in the oil supply area. Is provided. On the other hand, in the office 6, a level gauge control device 31 having a display 30 for displaying the liquid amount based on the measurement data from the level gauges 3, 3,. Is provided with a pump control device 32 for controlling the driving of the submergible pumps 2, 2... Based on the oil supply request signal from the liquid level meter and the liquid level signal from the liquid level meter control device 31.
[0007]
A check valve 8 is built in the head 7 of the submerged pump 2, and a discharge pipe 9 through the check valve 8 is connected to an oil supply pipe 10 common to the submerged pumps 2, 2. A plurality of branch pipes 11, 11... Are branched from the oil supply pipe 10, and this branch pipe 11 is connected to an inflow pipe 21 of the weighing machine 20. A valve 22 and a flow meter 24 are interposed in the inflow pipe 21 of the fueling device 20, a hose 26 having a fueling nozzle 25 attached to the tip is connected, and a nozzle switch 27 is provided for the nozzle hooking the fueling nozzle 25. It has been. The oil supply control device 28 receives a signal from the nozzle switch 27, outputs an oil supply request signal to the pump control device 32, drives the valve 22 to open and close, resets the indicator 29, and sets the flow rate pulse transmitter of the flow meter 24. 23 has a function of counting pulses from 23 and displaying on the indicator 29.
[0008]
The liquid level gauge control device 31 in the office 6 receives the measurement data from the liquid level gauges 3, 3,..., Calculates the liquid amount in each tank T1, T1. Then, the liquid amount signal of each tank T1, T1,... Is output to the pump control device 32. The pump control device 32 includes a drive number determination means 33 that determines the number of submerged pumps 2 to be driven according to the number of oil supply request signals input from the measuring machines 20, 20. The priority drive determination means 34 that determines the submergible pumps 2 to be used preferentially in response to the liquid amount signal from the signal 31, and the priority drive determination means 34 determines the number of submergeable pumps 2 determined by the drive number determination means 33. And pump driving means 35 for outputting drive signals in the given priority order.
[0009]
Next, the operation of the example of the oil supply device having two oil storage tanks T1 and T2 will be described based on the flowcharts of FIGS. The liquid level control device 31 in the office 6 always receives the measurement data from the liquid level gauges 3 and 3, calculates the liquid amount in each of the oil storage tanks T 1 and T 2 and displays it on the display 30. Is output to the pump control device 32. The priority drive determination means 34 of the pump control device 32 that has received this liquid amount signal determines which oil tank has the larger amount of liquid (S1 in FIG. 2), and pumps the priority order signal in which the tank numbers are arranged in the descending order. It outputs to the drive means 35 (FIG. 2, S2, S3).
[0010]
When the oil supply nozzle 25 is removed from the nozzle hook in order to supply oil to the vehicle, a nozzle removal signal is transmitted from the nozzle switch 27 to the oil supply control device 28, and the oil supply control device 28 displays the previous oil supply amount displayed on the indicator 29. Is reset, an oil supply request signal is output to the pump control device 32, and the valve 22 is opened.
[0011]
The drive number determination means 33 of the pump control device 32 outputs a single drive signal to the pump drive means 35 when the oil supply request signal is input from the oil supply control device 28 of the measuring machine 20 (S1 in FIG. 3) (S2 in FIG. 3). ).
[0012]
The pump drive means 35 is always looking at the drive number signal from the drive number determination means 33 (S1, S2, S3 in FIG. 4), and when one drive signal is input (S1 in FIG. 4), the priority drive determination means. A drive signal is output to the submergible pump 2 of the priority 1 of the priority signal from 34 (S4 in FIG. 4).
[0013]
The submergible pump 2 that has received the drive signal from the pump drive means 35 of the pump control device 32 is driven, and the oil in the oil storage tank is supplied with the check valve 8, the discharge pipe 9, the oil supply pipe 10, the branch pipe 11, the inflow pipe 21, Oil is supplied to the automobile from the oil supply nozzle 27 through the valve 22, the flow meter 24 and the hose 26. The oil supply amount is measured by the flow meter 24, and the flow rate pulse from the flow rate pulse transmitter 23 is counted by the oil supply control device 28 and displayed on the display meter 29.
[0014]
At this time, because of the check valve 8 provided on the head 7 of the submersible pump 2, no oil flows out to the side of the submerged pump 2 that is not driven, and the valve 22 opens only during use. Therefore, oil does not flow out to the weighing machine 20 that is not used.
[0015]
The number-of-drive determination means 33 of the pump control device 32 has received a refueling request signal from another metering machine 20, and has reached a number that is not in time for liquid feeding from one submergible pump, for example, 3 or more. (S3 in FIG. 3), or it is determined whether the fueling from all the weighing machines 20, 20... Has finished and becomes 0 (S4 in FIG. 3). It outputs to the means 35 (FIG. 3 S5), and when it becomes 0, a stop signal is output to the pump drive means 35 (FIG. 3 S6). Then, when the drive signal of the second unit is being output (S5 in FIG. 3), if the oil supply request signal becomes 3 or less (S7 in FIG. 3), one unit drive signal is output to the pump drive means 35 (S8 in FIG. 3).
[0016]
On the other hand, in the pump drive means 35, when the drive number signal from the drive number determination means 33 becomes two (S2 in FIG. 4), the drive signal is also output to the submergible pump 2 having the lower priority (S5 in FIG. 4). ) When the number of drive signals becomes zero (S3 in FIG. 4), the drive signals output to both submergeable pumps 2 and 2 are stopped (S6 in FIG. 4).
[0017]
【The invention's effect】
As described above, according to the present invention, the discharge pipes of the submerged pumps respectively provided in the plurality of oil storage tanks are connected to the common oil supply pipe, and the inflow pipes of the plurality of measuring machines are connected to the oil supply pipe. In the oil supply device provided with the pump control device that drives the submerged pump in response to the oil supply request signal from the oil storage tank, each oil storage tank is provided with a liquid level gauge, and the measurement signal of the liquid level gauge is sent to the liquid level gauge control device Since the pump control device receives the liquid level signal from the liquid level meter control device, the pump control device has a pump drive means for preferentially driving the submergible pump provided in the oil storage tank having a large amount of liquid. No separate piping is required, and the oil in each oil storage tank can be used evenly without taking a complicated structure.
[Brief description of the drawings]
FIG. 1 is an overall view illustrating a fueling device of the present invention.
FIG. 2 is a flowchart showing the operation of priority drive determination means of the present invention.
FIG. 3 is a flowchart showing the operation of the drive number determination means of the present invention.
FIG. 4 is a flowchart showing the operation of the pump driving means of the present invention.
[Explanation of symbols]
T1, T2 Oil storage tank 2 Submerged pump 3 Liquid level gauge 4 Oil supply pipe 5 Island 6 Office 7 Head 8 Check valve 9 Discharge pipe 10 Oil supply pipe 11 Branch pipe 20 Measuring machine 21 Inflow pipe 22 Valve 23 Flow rate pulse transmitter 24 Flow meter 25 Lubrication nozzle 26 Hose 27 Nozzle switch 28 Lubrication control device 29 Display meter 30 Display 31 Liquid level meter control device 32 Pump control device 33 Number of drive number judgment means 34 Priority drive judgment means 35 Pump drive means

Claims (1)

Connect the discharge pipes of the submerged pumps installed in multiple oil storage tanks to a common oil supply pipe, connect the inflow pipes of multiple measuring machines to this oil supply pipe, and receive the oil supply request signal from each measuring machine. In an oil supply apparatus provided with a pump control device for driving a pump, each of the oil storage tanks is provided with a liquid level gauge, and a measurement signal of the liquid level gauge is input to the liquid level gauge control apparatus. receiving a liquid volume signals from the surface meter controller, the submerged Bull pump provided in the large oil storage tank of liquid volume comprises a pump drive means for driving preferentially, in the pump control device, each weighing machine Drive number determination means for determining the number of submerged pumps to be driven according to the number of oil supply request signals input from the sub-mergible, and a sub-mer to be used with priority in response to a liquid amount signal from the level gauge control device. ; And a preferential driving determining means for determining the Buruponpu, said pump drive means and drives the submerged Bull pump number which is determined by the driving quantity determining means to a predetermined priority order with priority drive decision section Refueling device.

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