JPH072516B2 - Refueling device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fueling device provided in a gasoline service station for refueling an automobile or the like.

[Conventional technology]

There are two types of gasoline refueling equipment, one fixed on the ground on the island and one suspended from the canopy, in which the refueling hose is suspended from the canopy. Since it extends to the refueling hose storage device along the line, the piping becomes extremely long. Therefore, if a pipe is damaged during an earthquake, a large amount of oil remains in the pipe, which is very dangerous because it leaks out. If the canopy itself collapses, this risk becomes even greater.

As a countermeasure against this, when a seismic sensor is installed and the earthquake is detected, the valve is switched and the pump is rotated in the forward direction to allow the oil in the piping to flow out to the underground tank via the return path specially provided for the oil supply piping, Instead of rotating the pump in the normal direction, there is a method of reversing it so that the oil flows out to the underground tank, and a method of opening the valve to let the oil naturally flow down to the underground tank.

[Problems to be solved by the invention]

However, in these methods, when the earthquake subsides, oil is sent back into the pipes and oil supply is restarted, so if there is damage due to an earthquake in the middle of the pipes, an oil leak will occur and normal oil supply will be resumed. I can't. Therefore, the conventional method can prevent the disaster caused by the oil spill at the time of the earthquake, but it cannot prevent the disaster occurrence after the earthquake caused by the earthquake has subsided, and it cannot be said that the safety measures are sufficient. It was

The object of the present invention is to eliminate the inconveniences of the conventional examples and prevent not only the occurrence of a disaster at the time of an earthquake, but also the occurrence of a disaster caused by the earthquake after the earthquake has subsided, and sufficient safety is ensured. It is to provide a refueling device that can be secured.

[Means for solving problems]

According to the present invention, in order to achieve the above object, a hose storage device in which a refueling hose having a nozzle valve at a tip end is movably suspended is attached to a canopy, one end is connected to an underground tank, and the other end is erected on the canopy. Install a refueling pump and a flow meter in the middle of the refueling hose connected to the refueling hose in the rear hose storage device, and install a seismic shock absorber on the refueling device equipped with a refueling amount indicator that displays the measured amount of the flow meter. In a refueling device that allows the oil in the refueling pipe to flow out to the underground tank when the device detects vibration, a pressure detector mounted on the discharge side pipe of the flow meter and an inspection to check for leaks in the pipe A switch, a pressure control means for driving the oil pump for a certain period of time with a start signal from the switch to pump oil from the underground tank, and a detection signal from the seismic sensor to output an oil refueling disable signal, A refueling control enable means for outputting a refueling enable signal when the detection signal from the pressure detector after a fixed time after the pump is driven by the pressure control means is equal to or higher than a predetermined pressure, and a refueling disable signal from the refueling control enable means 31. In response to this, the drive of the refueling amount indicator is stopped, and when the refueling ready signal is received, the refueling amount indicator is
The gist is to provide a refueling control means for permitting the driving of 22.

[Action]

According to the present invention, when an earthquake occurs, if the vibration caused by the earthquake is equal to or greater than a certain value, the seismic detector stops the output from the refueling control enable means to the refueling control means by the earthquake detection signal, and the refueling device cannot refuel. Becomes

At the same time, the pressurization control means drives the oil supply pump for a certain period of time.

As a result, the oil in the oil supply pipe is quickly discharged into the tank by the operation of the oil supply pump.

Since the return of such oil to the underground tank is completed within a certain time, when the earthquake is subsided, the refueling pump is then driven to inspect the refueling pipe for damage next time.

However, at this time, the oil in the oil supply pipe is returned to the underground tank by the above operation, so there is only air here, so the air in the oil supply pipe is pushed by the oil sent from the underground tank by the drive of the oil supply pump. Oil rises from the underground tank by the amount of pressure and air compressed. Next, the output signal from the pressurization control means prevents the oil in the refueling pipe from falling into the underground tank, and the pressurization control means sends a pressurization end signal to the refueling control enable means.

If the pressure detection signal in the oil supply pipe from the pressure detector does not drop within a certain time after the pressurization of air in the oil supply pipe is completed in this way, there is no leakage in the oil supply pipe and there is no damage and the oil supply control is performed. The refueling possible signal is input from the refueling control enabling means to the refueling control means, and the refueling device is ready to refuel.

However, if the air in the refueling pipe is not pressurized even if it is pressurized, or if a pressure drop is observed after pressurization, the refueling control enable means does not output a refueling enable signal to the refueling control means. Indicates that refueling is not possible, the refueling amount indicator does not operate, and the hose reel motor does not rotate.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a piping explanatory view showing an embodiment of the oil supply device of the present invention,
FIG. 2 is a block diagram of the same as above. First, the general structure of the fueling device will be described. In the figure, 1 is an underground tank and 2 is a canopy.
Hose reel 2a that is hung from the inside and is driven by a motor 2b inside and a hose position detector 2c that works with this reel 2a
A hose accommodating device 3 provided with a hose reel 2a is wound around the hose reel 2a and is vertically hung from the accommodating device 2 and provided with a nozzle valve 3a and a hose elevating control switch 3b at the tip thereof. It is an oil supply pipe arranged along the wall 20 and the canopy 19 so as to connect the end of 3 and the underground tank 1. In the middle of the oil supply pipe 4, a check valve 5 for preventing oil in the pipe from flowing down from the lower stage when oil is not supplied, an oil supply pump 6, and a flow meter 7 to which a flow rate pulse transmitter 7a is attached are sequentially provided, A bypass 8 connecting the flow meter 7 and the fuel pump 6 and the check valve 5 and the underground tank 1 is provided with a safety valve 9 for releasing the pressure when the pressure in the pipe becomes abnormally high. The barrel oil supply pipe 4 is provided with a control valve 10 which allows only an upward flow. In the figure, 21 is a pump 6
A pump motor for driving the oil pump 22 and a reference numeral 22 for a fuel supply amount indicator provided on the wall 20 or the like.

The above is a normal refueling device, and as a seismic safety device to be added to this, one of the refueling pipes 4 (preferably in the upper position)
Atmosphere release valve 11 for introducing air into the pipe is provided in the above, and solenoid valves 12 and 13 are provided before and after the pump 6, respectively. Further, a branch passage 14 connecting the discharge side of the flow meter 7 of the oil supply pipe 4 to the pump 6 and the solenoid valve 12, and a branch passage 15 connecting the pump 6 and the solenoid valve 13 to the underground tank 1 and the check valve 5. And a solenoid valve 17 is provided in each of these branch passages 14 and 15.

The atmosphere release valve 11 may be a solenoid valve, but may be a check valve that automatically opens by suction negative pressure of the pump.
The solenoid valves 16 and 17 are normally closed so that oil does not flow into the branch passages 14 and 15, and the solenoid valves 12 and 13 are open.

On the other hand, a pressure detector 18 as a pressure measuring means is attached to the discharge side of the flow meter 7 of the oil supply pipe 4, and it is arranged side by side with a control device 25 installed in the office 23 of the gas filling station. A tremor 28 was installed.

In the figure, reference numeral 24 is a so-called pump chamber, in which various devices such as the pump 6 and the flow meter 7 and valves are housed.

The control device 25 uses a microcomputer or the like. As shown in the block diagram of FIG. 2, the refueling control means 36 of the control device 25 receives the outputs from the hose lifting control switch 3b and the hose position detector and receives the pump motor. A drive signal is output to the drive means 32 and the hose reel motor control means 35 to rotate the motors 21 and 2b, and the flow rate pulse transmitter 7
The amount of refueling is calculated by receiving the output of a and the amount display signal is output to the refueling amount indicator driving means 34 to display the amount of refueling on the refueling amount indicator 22.

Furthermore, the enable signal from the refueling control enable means 31 is introduced. The seismic detection signal from the seismic sensor 28 is introduced into the oil return control means 29, the drive signal from the means 29 is introduced into the valve drive means 33 and the pump motor drive means 32, and the valves 11, 12, 13, 16 are introduced. , 17 are opened and closed, and the motor 21 is rotated. Further, a refueling impossible signal is introduced to the refueling control enable means 31.

The activation signal from the inspection switch 27 is introduced into the pressurization control means 30, the drive signal from the means 30 is introduced into the valve drive means 33 and the pump motor drive means 32, and the valves 11, 12, 13, 16, 17 are turned on. Open and close to rotate the motor 21. Further, the pressure signal from the pressure measuring means 18 was introduced into the oil supply controllable means 31.

Next, the operation will be described. Normally, the refueling control enable means 31 inputs a refueling enable signal to the refueling control means 36.
If you press the hose lift control switch 3b in this state,
A normal rotation signal is input to the motor drive means 35 from the oil supply control means 36 of the control device 25 by the rising position signal of the hose position detector 2c and the pressing signal of the switch 3b, the motor 2b is normally rotated, and the oil supply hose 3 is supplied from the hose reel 2a. When the hose 3 descends to the oiling position, the hose position detector 2c inputs a descending position signal to the oiling control means 36, and the motor 2b stops. In addition, from the refueling control means 36 to the pump motor drive means
A drive signal is output to 32, the pump motor 21 is started, the refueling pump 6 is driven, and refueling is possible. When the nozzle valve 3a is inserted into the fuel filler port of the automobile and opened, the oil sucked from the underground tank 1 by the power of the fuel pump 6 is checked valve 5 → oil pump 6 → control valve 10 → flow meter 7 →
It flows with the fuel supply hose 3 and is poured into the fuel tank of the automobile through the nozzle valve 3a at the tip.

The amount of refueling at that time is determined by the flow pulse generator provided in the flow meter 7.
The flow rate pulse from 7a is calculated by the refueling control means 36 and displayed on the refueling amount display meter 22 via the indicator driving means 34.

After refueling, if you press the hose lift control switch 3b, the motor 2b will reverse and the hose reel 2a will refuel the hose 3
The hose position detector 2c
The motor 2b is stopped by the rising position signal of. Further, the pump motor 21 and the oil supply pump 6 are stopped.

When the oil supply pump 6 is not driven and the oil supply is not performed, the check valve 5 blocks the reverse flow, and when the internal pressure of the pipe becomes high due to temperature rise such as in summer, the expanded oil pushes the safety valve 9 and flows through the bypass passage 8 to the underground. Return to tank 1.

By the way, when an earthquake occurs, if the vibration caused by the earthquake is a certain value (for example, seismic intensity 5) or more, an earthquake detection signal is output from the seismic sensor 28 to the oil return control means 29, and a refueling impossibility signal from this is sent to the refueling control enable means. 31. As a result, the oil output from the oil supply controllable means 31 to the oil supply control means 36 is stopped, and the oil supply device becomes incapable of oil supply.

At the same time, the output signal from the oil return control means 29 is the valve drive means 33.
Is also output for a certain period of time (for example, 10
Atmosphere release valve 11, solenoid valves 16 and 17 open, solenoid valves 12 and 1
3, the output signal from the oil return control means 29 is input to the pump motor drive means 32, and the pump motor 21 is driven for a fixed time (for example, 80 seconds).

As a result, the inside of the oil supply pipe 4 is communicated with the atmosphere by the air release valve 11, and the portion of the oil supply pipe 4 above the flowmeter 7 → the branch path 14 →
A return path to the underground tank 1 is formed from the pump 6 to the branch path 15, and the oil in the oil supply pipe 4 is quickly discharged to the tank 1 by the function of the pump.

Since the return of the oil to the underground tank 1 is completed within 80 seconds, the pump 6 is stopped after 80 seconds has passed and the various valves return to their original states after 100 seconds have passed.

In this way, when the earthquake has subsided, the inspection switch 27 is closed and a start signal is sent to the pressurization control means 30 in order to inspect for damage to the fuel supply pipe 4, and the output from this is sent via the pump porter drive means 32. The pump motor 21 is turned on for a fixed time (for example, 10 seconds) to drive the oil supply pump 6. However, at this time, the oil in the oil supply pipe 4 is returned to the underground tank 1 by the above-mentioned operation, so that only air is present here, so that it is pushed by the oil sent from the underground tank 1 by the operation of the oil supply pump 6. The air in the oil supply pipe 4 is pressurized, and the oil rises from the underground tank 1 by the amount of the compressed air. Next, the output signal from the pressurization control means 30 is sent to the solenoid valve 12 via the valve drive means 33 to close the solenoid valve 12 so that the oil in the oil supply pipe 4 does not drop into the underground tank 1 and the pressurization control is performed. means
A pressure end signal is sent from 30 to refueling controllable means 31.

When the pressurization of the air in the oil supply pipe 4 is completed in this way, if the pressure detection signal in the oil supply pipe 4 from the pressure detector 18 does not drop within a fixed time (for example, 60 seconds), the oil supply is performed. The refueling control enable means 31 determines that the pipe 4 has no leakage and no damage, and the refueling control enable means 31 sends a refueling enable signal to the refueling control means 36.
And the refueling device is ready for refueling.

However, if the air in the oil supply pipe 4 is not pressurized even if it is pressurized, or if a pressure drop is observed after pressurization, the oil supply control enable means 31 outputs an oil supply enable signal to the oil supply control means 36. Is not performed, the refueling device becomes unrefuelable, the refueling amount indicator 22 does not operate, and the hose reel 2a motor
2b doesn't rotate either.

In the above embodiment, the oil supply pump 6 is used as the pressurizing means for increasing the internal pressure in the oil supply pipe 4 to pressurize the air in the pipe.
As another embodiment, a pressure vessel 26a equipped with a valve 26b is connected to the discharge side of the flow meter, and the valve 26b is opened by the output from the pressurization control means 30 to feed gas from the vessel 26a into the oil supply pipe 4 The inside may be pressurized.

〔The invention's effect〕

As described above, the refueling device of the present invention is inspected for damage to the refueling pipe after the earthquake, and refueling is possible only when it is determined that there is no damage, so refueling is performed with the refueling pipe being damaged. It is possible to prevent the resumption of the operation and to ensure sufficient safety.

[Brief description of drawings]

FIG. 1 is a piping explanatory view showing an embodiment of the oil supply device of the present invention,
FIG. 2 is a block diagram of the same as above. 1 ... Underground tank, 2 ... Hose storage device 2a ... Hose reel, 2b ... Motor 2c ... Hose position detector, 3 ... Refueling hose 3a ... Nozzle valve, 3b ... Hose lift control switch 4 ... … Oil supply pipe, 5 …… Check valve 6 …… Oil supply pump, 7 …… Flowmeter 7a …… Flow pulse transmitter, 8 …… Bypass pipe 9 …… Safety valve, 10 …… Control valve 11 …… Atmosphere release valve, 12,13,16,17 …… Solenoid valve 14,15 …… Branch, 18 …… Pressure detector 19 …… Canopy, 20 …… Wall 21 …… Pump motor, 22 …… Fluid amount indicator 23 …… Office, 24 ...... Pump chamber 25 ...... Control device, 26a ...... Pressure vessel 26b ...... Valve, 27 ...... Inspection switch 28 ...... Sensor, 29 ...... Oil return control means 30 ...... Pressure control means , 31 …… Refueling controllable means 32 …… Pump motor drive means, 33 …… Valve drive means 34 …… Refueling amount indicator drive means, 35 …… Over the drive means 36 ...... refueling control means

Claims (1)

[Claims] 1. A hose storage device 2 in which a refueling hose 3 having a nozzle valve 3a at its tip is suspended so as to be vertically movable is attached to a canopy 19, one end of which is connected to an underground tank 1 and the other end is raised on the canopy 19. In the hose accommodating device 2, a refueling device provided with a refueling pump 6 and a flow meter 7 in the middle of a refueling pipe 4 connected to a refueling hose 3, and a refueling amount indicator 22 for displaying the measured amount of the flow meter 7. In the refueling device, which is provided with a seismic absorber 28 and causes the oil in the refueling pipe 4 to flow out to the underground tank 1 when the vibration is detected, the pipe 4 on the discharge side of the flow meter is provided. Pressure detector 18 attached and piping 4
Inspection switch 27 for checking internal leakage and the switch
Pressurization control means 30 that drives refueling pump 6 for a certain period of time by a start signal from 27 to pump oil from underground tank 1 and a detection signal from seismic sensor 28 to output a refueling impossible signal and pressurize. Refueling controllable means 31 that outputs a refueling enable signal when the detection signal from the pressure detector 18 after a certain time after the pump is driven by the control means 30 is equal to or higher than a predetermined pressure, and refueling is not possible from the refueling control enablement means 31. A refueling device comprising: a refueling control means (36) for stopping the drive of the refueling amount display meter (22) in response to a signal and permitting the refueling amount indicator (22) to be driven in response to a refueling enable signal.