JPS593360B2 - Kasaibougosouchitsukiyuyuusouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling system provided with means for protecting a refueling facility from fire or explosion in the event of a fire.

Traditionally, when a fire occurs at a gas station where a large amount of fuel is stored in a storage tank, such as an office fire or a fire that ignites due to leaked oil inside the gas station, there is a risk of worker negligence or a fuel hose or fire. There is a risk of fuel leaking out of the refueling system due to damage to the refueling piping and causing a fire.Furthermore, due to a failure in the electrical system in the event of a fire, the fuel backflow prevention valve built into the pump pumping out fuel from the storage tank may be damaged. There was a risk that if the fuel was opened, fuel would flow back into the storage tank, filling the fuel supply piping and storage tank with air and fuel vapor, which could ignite and cause a large explosion.

This invention provides a refueling system that eliminates these dangers, and includes a fire detector that detects abnormal phenomena in the event of a fire and emits an electrical signal, and a cutoff valve installed in the middle of the refueling piping. This is characterized in that the electrical signal is used to cause the cutoff valve to close the oil supply pipe.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the configuration of the oil supply device according to the present invention.
In the figure, reference numeral 1 denotes a refueling device main body installed on the ground, and inside the refueling device main body 1 there is a pump 4 that pumps out fuel in a storage tank 2 buried underground through a refueling pipe 3;
drive motor 5, flow meter 6 installed in the middle of the oil supply pipe 3
It is equipped with a flow rate indicator I that displays the amount of refueling in conjunction with the flow meter 6, and a refueling hose 8 at the tip of the refueling pipe 3.
A refueling nozzle 9 is attached to the tip of the refueling hose 8.

Next, a solenoid valve 10 is installed in the fuel supply pipe 3 at a position between the storage tank 2 and the pump 4, and a fire detector 11 and a power supply section 12 are provided in the fuel supply device main body 1.

The fire detector 11 has a bimetal contact 11a inside.
The bimetal contact 11a opens when the temperature of the atmosphere rises.

Further, the solenoid valve 10 is configured such that when current is applied to the magnet coil 10a, the valve body 10b opens the valve port 10c, and conversely, when the current is turned off, the valve port 10c is closed and the fuel passage in the fuel supply pipe 3 is cut off. It has become.

The fire detector 11 and the solenoid valve 10 are electrically wired as shown in FIG.

That is, the push-button energizing switch 13a, the push-button deenergizing switch 13b, the bimetal contact 11a, and the relay 14 are connected in series to the power supplies R and T, and the first a contact 14aa of the relay 14 is connected to the push-button energizing switch. 13a and the second a contact 14a of the relay 14.
b and a magnet coil 10a (see FIG. 1) in the solenoid valve 10 are connected in series to power supplies R and T.

Then, press the push button type energizing switch 13a, the IJ relay 14 is energized, the first a contact 14aa and the second a contact 14ab are closed, and the magnet coil 10 of the solenoid valve 10 is closed.
a (see FIG. 1) is excited.

On the other hand, when the magnet coil 10a is excited, the valve body 10b opens the valve port 10c.

This state is maintained by the first a contact 14aa.

Next, when a fire occurs, the bimetal contact 11a of the fire detector 11 opens in response to the abnormal temperature rise in the atmosphere.

Then, since the relay 14 is deenergized, the magnet coil 10a is demagnetized and the valve body 10b closes the valve port 10c.

Here, once the bimetal contact 11a is opened, even if the bimetal contact 11a is closed again due to the extinguishment of the fire, the valve port 9c will be closed unless the push button type energizing switch 13a is pressed again.
is not opened.

Next, FIG. 3 shows another embodiment in which the present invention is applied to a ceiling type oil supply device.

In the figure, 1' is the main body of the refueling system, 2' is the storage tank, and 3
' is a fuel supply pipe, 4' is a pump for pumping out fuel, 5' is a motor for driving the pump 4', 6' is a flow meter, and 7' is a flow rate indicator linked to the flow meter 61. A refueling hose 8' is connected to the distal end of the refueling hose 8', and a refueling nozzle 9' is attached to the distal end of the refueling hose 8'.

Next, in the refueling piping 3', a solenoid valve 10' is installed at a position between the storage tank 21 and the pump 4', and a solenoid valve 10'' is also installed near the connection part of the refueling hose 8'. Fire detectors 11' and 11'' are installed on the wall 14 and ceiling 15 of the building 1', respectively.

The structures of these solenoid valves 10', 10'' and fire detectors 11', 11'' are the same as in the previous embodiment, and these electrical wirings are connected to both fire detectors instead of the bimetal contact 11a in FIG. Bimetal contacts 11a', 11
a) are connected in series, and both solenoid valves 1 are used instead of the solenoid valve 10.
0' and 10'' are connected in parallel.

In this embodiment a plurality of fire detectors 11'.

11〃, the fire can be detected faster, and the shutoff valve can be connected to the storage tank 2' and the pump 4'.
This prevents the storage tank 21 from igniting and exploding as much as possible, and a shutoff valve is also provided in the middle of the refueling pipe near the connection of the refueling hose 8' to reduce the amount of fuel flowing out. It can be kept to a small amount.

In addition, in these examples, the fire detector uses bimetal contacts that are sensitive to changes in the temperature of the atmosphere.
The devices are not limited to these, but may include sensors that use heat-sensitive elements such as thermocouples, smoke detectors, or infrared sensors that detect abnormal phenomena in the event of a fire and emit electrical signals. It can be applied to any fire detector.

As shown in the latter embodiment, a plurality of fire detectors may be installed in locations where fires are likely to occur, such as inside and outside the office, as required.

In addition, in these embodiments, a solenoid valve is used as a cutoff valve installed in the oil supply pipe, but the invention is not limited to this, and pneumatic, hydraulic, or mechanical type valves using a solenoid valve as a pilot valve may be used. The shutoff valve may be a shutoff valve or an electric valve, and any shutoff valve may be used as long as it has a structure that closes the fuel supply pipe in response to an electric signal from a fire detector.

The shutoff valve can be installed anywhere in the oil supply piping between the storage tank and the oil supply nozzle, but it is especially important to install it between the pump and the storage tank as shown in the above embodiment. In order to protect the fuel supply system from the risk of explosion, and to keep the amount of fuel flowing out from the fuel supply system to a minimum, it is preferable to install two or more shutoff valves in the middle of the fuel supply pipe, as in the latter embodiment. It's better to

In addition, when installing multiple fire detectors and shutoff valves, the electrical wiring for these is such that if any one fire detector detects a fire, all shutoff valves are closed, and only one shutoff valve is connected. It is well known that even if one device fails, the others can be connected so that they can operate normally without being affected.

Since this invention is configured as described above, when a fire occurs at a gas station, the fire detector immediately detects the fire and emits an electric signal, and this electric signal closes the cutoff valve installed in the middle of the gas supply pipe. Therefore, it is possible to prevent fuel from flowing out from the fuel supply device and also to prevent the storage tank from catching fire.

In addition, multiple fire detectors and shutoff valves can be installed as needed, so fires can be detected more quickly and fires can be kept to a minimum. .

Therefore, safety can be further improved.

On the other hand, it has an extremely simple structure and is easy to manufacture and install, so it has the advantage that it can be installed easily and inexpensively at gas stations and the like.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention. FIG. 2 is an electrical wiring diagram of the fire detector and shutoff valve in FIG. 1. FIG. 3 is a configuration diagram showing another embodiment. 1.1'・・・-・
・Refueling device, 2,2'...Storage tank, 3.3
/-・・・・・・Refueling piping, 9,91・・・・・・Refueling nozzle, 10.101,1(y′・・・・Solenoid valve, 1
1, 11', 11"...Fire detector.

Claims (1)

[Claims] 1. A solenoid valve is installed in the refueling pipe between the storage tank and the pump of the refueling system, and a fire detector is installed at an appropriate location within the refueling station, and the solenoid valve and fire detector are connected in parallel to the power supply, A fuel supply device with a fire protection device, characterized in that the solenoid valve is connected in series with a contact that operates to close the solenoid valve in response to an electric signal generated when the fire detector detects a fire.