JPH0128071Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present application relates to a safety device at a gas station where automobiles are refueled.

(b) Conventional technology Gas stations usually have multiple oil storage tanks separated by oil type, and refueling is performed by pumping out this oil with a refueling device installed on the ground. When the oil level decreases, a tank truck brings in oil and replenishes by connecting the oil filler port of the oil storage tank to the tank of the truck with a hose.

The flow rate of oil at this time of replenishment is very fast, and since all oil has electrical insulation properties, a large amount of static electricity is generated at this time and accumulates in the oil in the oil storage tank. Since the fuel storage tank is electrically grounded, static electricity will escape over time, but if the fuel tank is operated during refueling to refuel the customer's car, the static electricity will still be filled. This may cause a fire due to static electricity discharge and sparks. Also, during this replenishment, the oil in the oil storage tank is agitated, causing dirt and other debris at the bottom of the tank to fly up, and if this oil is sucked up, it can clog the filter in the oil supply system. Therefore, while refilling a fuel tank, you should refrain from using the refueling device connected to the tank, but at general gas stations, the location of the refueling device and the location of the filler port are far apart, so be careful. However, when the number of fuel supply devices and oil storage tanks increases, it is often difficult to decide which fuel supply device to refrain from using.

(c) Purpose The purpose of this application is to prevent the occurrence of the above-mentioned problems such as the filling of static electricity-filled oil and filter clogging due to operation of the oil supply device connected to the oil storage tank when oil is being filled.

(d) Structure and operation The structure for achieving the above purpose consists of an oil storage tank,
In a refueling station that is equipped with an oil filler port connected to each oil storage tank, a pump for pumping out oil, and a motor that drives the pump, it is possible to move forward and backward with respect to the lorry hose connection position of the oil filler port, and when moving out, the hose is A baffle member that takes a position that obstructs the connection to the oil filling port and a detection switch that detects the position of the baffle member are provided, and when the baffle member is not in the advancing position, the output of the detection switch is used to control the pump. This device is equipped with a motor control means that stops the supply of biasing force power to the drive motor, and when the obstruction member is moved to connect the lorry hose to the fuel filler port, the detection switch detects this and stops the supply of biasing force power to the fuel filler port. Prevents the drive of the pump motor that pumps oil from the connected oil storage tank.

(E) Example In Fig. 1, T ₁ and T ₂ are oil storage tanks containing different types of oil, which are buried underground.
It is connected to oil filler fittings C ₁ and C ₂ via P ₁ and P ₂ , and to oil supply devices D ₁ and D ₂ via pipes P ₃ and P ₄ .

J is the control panel for switches S ₁ and S ₂ and signal lines, which will be explained later.
Oil supply device connected by A ₁ and A ₂ and equipped with nozzles N ₁ and N ₂
D ₁ and D ₂ are power supply lines containing both 100V and 200V
They are connected by B ₁ and B ₂ .

F is the primary power supply line of the control panel J.

Figures 2A, B, 3, and 4 will be explained below, but since each device related to tank T ₁ and tank T ₂ is independently provided with the same equipment,
The device related to _T1 will be representatively explained.

Figures 2A and B show the first embodiment showing the mechanism for operating the switch _S1 , and 2 shows a fixed frame in which the switch _S1 is held and screwed to the pipe _P1 near the fuel filler fitting _C1 . It is fixed by an appropriate method such as

Reference numeral 4 denotes an L-shaped baffle member that can rotate around a shaft 6 installed in the fixed frame 2. Depending on its rotational position, a stopper 8 formed on the baffle member 4 activates the detection piece 10 of the switch _S1 . When the detection piece 10 is not pushed in, that is, when the hose 12 is connected to the fuel filler fitting C ₁ and the baffle member 4 is in the position shown by the solid line or the two-dot chain line in Fig. 2A, the switch is pressed.
Contact P ₁ in S ₁ closes and performs the function described below.

14 is the cap, which is the oil filler port fitting C ₁ when not being refilled.
In this state, the baffle member 4 can take the position shown in FIG. 2B, and at this time the detection piece ₁₀ of the switch S1
is pushed in and contact _P1 is open.

FIG. 3 shows a second embodiment showing a mechanism for operating a switch. Functional parts common to those of the first embodiment are indicated by adding a dot to the symbol of the part.

Reference numeral 16 denotes a holding frame that holds the switch S _{1 ′} and the extension shaft 18. It is urged downward by a spring 20.

22 and 24 are stopper flanges formed on the extension shaft 18. On the other hand, the baffle member 4' has a slope 28 on which the hemispherical lower end 26 of the extension shaft 18 slides.
and a recess 30 with which the lower end 26 engages are formed, and when the baffle member 4' is rotated from the two-dot chain line position to the solid line position during replenishment, the lower end 26 is biased by the spring 20 from the two-dot chain line position to the solid line position. , and the detection piece 10' of the switch S ₁ ' is pushed in. At this time, the contact P ₁ ' of the switch S ₁ ' closes, and the extension shaft 18 and the baffle member 4' are at the solid line position. Stably locked.

The first embodiment and the second embodiment both have oil filler fittings.
When connecting the hoses 12, 12' to C ₁ , C ₁ ', the contacts P ₁ and P ₁ ' of the switches S ₁ and S ₁ ' are closed, but as in the first embodiment, When installing an electrical contact near a fuel filler port that handles oil that has the risk of flammability, it is necessary to take some kind of explosion-proof measures.On the other hand, when installing it at a high place away from this hazardous area as in the second embodiment, it is necessary to take some explosion-proof measures. There is no need to take any of the above measures, and either one may be selected depending on the circumstances of the site.

In Figure 4, CB ₁ and CB ₂ are for 100V, respectively.
In the 200V breaker, SC ₁ is the drive coil for contact MC ₁ , SC ₂ is the drive coil for contact MC ₂ , MO is the drive motor for the oil pump (not shown),
LS has nozzle N ₁ in the non-lubrication position (position shown in Figure 1)
The contact of the switch that closes when removed from the machine, L ₁
is a lighting lamp and is a contact point for an alternate type switch.
_L2 is a notification lamp which is turned on when PB is closed and is placed at a suitable location in the refueling device _D1 , and when the excitation by the coil R is released, the contact Q is closed and the lamp is turned on to provide notification as will be described later.

In the above configuration, when the tank T ₁ is not refilled, the baffle members 4, 4' are in the position shown in FIG. 2B or the two-dot chain line in FIG.
At this time, contacts P _{1 and} P _{1 '} are open, coil SC ₁ is deenergized, and contact MC ₁ is closed. As a result, a voltage of 200V is supplied to the oil supply device D ₁ , so when nozzle N ₁ is removed from the non-lubrication position, contact LS closes, coil SC ₂ is energized, and contact MC ₂
closes, the motor MO is energized, the pump rotates, and the vehicle is ready to be refueled.

However, when replenishing tank T ₁ , hose 12,
12', when the baffle members 4, 4' are rotationally displaced to the position shown in FIG. 2A or the solid line position in FIG. 3, the contacts P ₁ and P ₁ ' of the switches S ₁ and S ₁ ' are closed.
This excites the coil SC ₁ and opens the contact MC ₁ to cut off the power supply to the oil supply device D ₁ for energizing the motor MO. That is, in this state, even if an attempt is made to refuel by removing the nozzle _N1 from the non-refueling position, the motor MO will not be energized and refueling will not be possible. At this time, the coil R, which is always energized, is deenergized, which closes the contact Q, lights up the lamp _L2 , and supplies oil to the tank _T1 connected to the oil supply device _D1 . Let me know what's going on.

When the supply is completed and the baffle members 4, 4' are returned to the position indicated by the two-dot chain line in Fig. 2B or Fig. 3, the contact point _P1 ,
P ₁ ′ opens, contact MC ₁ closes, and the motor MO is returned to a state where it can be energized again, and contact Q opens and lamp L ₂ goes out.

In addition to the electric contact type switch for detecting the position of the obstruction member, it is also possible to use a switch that uses a light sensor or a magnetic sensor.Furthermore, it is possible to use a switch that uses an optical sensor or a magnetic sensor. Adds a timer that measures a certain amount of time from the point when contact P ₁ opens, and closes contact MC ₁ when this timer finishes measuring the oil supply system.
It is also possible to delay the time when D ₁ can be used.

(F) Effect As detailed above, the pump drive motor is controlled by detecting the position of the member that obstructs the connection of the hose to the oil filler port, so when the hose is connected to the oil filler port to replenish oil, the pump drive motor is controlled. Since the oil supply device connected to the oil filler port via the oil storage tank becomes unusable,
It is possible to solve problems such as oil filled with static electricity being refueled into a car, and the filter of a refueling device being clogged by dust flying up in the oil.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing only the parts related to the present application among the equipment at a gas filling station, and FIG.
Figure B shows a state in which the mechanism in Figure 2A is displaced, and Figure 3 shows a second embodiment of the switch operating section.
FIG. 4 is a diagram showing an electric circuit including a notification lamp. 2, 2'... fixed frame, 4, 4'... baffle member, 1
2, 12'... Hose, C ₁ , C ₁ ', C ₂ ... Oil filler fitting, T ₁ , T ₂ ... Oil storage tank, MC ₁ , MC ₂ ... Contact,
MO...Motor.

Claims (1)

[Scope of utility model registration request] In a refueling station equipped with an oil storage tank, an oil filler port connected to the oil tank, a pump for pumping out the oil, and a motor that drives the pump, the oil filler port can be moved forward and backward from the lorry hose connection position. A baffle member that sometimes takes a position that obstructs the connection of the hose to the oil filler port, and a detection switch that detects the position of the baffle member, and when the baffle member is not in the advancing position, the detection switch has an output. A safety device for a gas service station, comprising a motor control means for stopping the supply of energizing power to the driving motor of the pump.