JPS5912558B2 - nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to nozzles, particularly for use in dispensing flammable fluids.

2. Description of the Related Art While refueling a car at a place where flammable fluid is supplied, such as a gas station, an accident may occur in which oil ignites and bursts into flames due to static electricity or the like.

In this case, the operator of the refueling nozzle usually leaves the nozzle inserted in the vehicle's refueling port and turns off the pump switch of the refueling system, or throws the nozzle onto the ground.

The oil supply is stopped when the pump is turned off, and if the nozzle is designed to close due to impact, the oil supply will be stopped if the nozzle is thrown onto the ground as described above. The area around the car's oil filler port and nozzle continues to burn, so it is necessary to go to get a fire extinguisher to extinguish the fire, and the fire continues to spread during this time.

In view of this point, an object of the present invention is to provide a nozzle equipped with a fire extinguishing means that can quickly extinguish a fire as described above.

The illustrated embodiment will be described in detail below.

1 is the nozzle body, 2 is a negative pressure compensating pipe that forms part of the automatic closing mechanism (so-called full tank automatic stop mechanism: not shown) of the nozzle's built-in valve (not shown), and is extended into the nozzle tip pipe 3. It is opened to the outside at the tip 2a.

A longitudinal groove 4 is provided on the outer surface of the nozzle tip pipe 3, and an inert gas or extinguishing agent supply pipe 5, which will be described later, is fitted along this groove 4.

The outer end 5a of this pipe 5 opens at the tip of the nozzle tip pipe 3, and this opening is sealed with a plug 15 made of a thermofusible substance.

The inner end 5b of the pipe 5 opens into a cavity 7a in the grip 6 of the nozzle.

A cylinder 8 of an inert gas, for example carbon dioxide, is accommodated in a cavity 7b communicating with the cavity 7a.

Reference numeral 9 is a valve stem of a built-in valve (not shown) of the cylinder 8, and 10 is an abutment member disposed at the boundary between the cavities 7a and 7b, which is integrally formed with the backing receiver 11.

14 is a backing.

A plug 12 is screwed into the lower end of the grip part 6 of the nozzle body 1,
A helical spring 13 is connected between this stopper 12 and the bottom of the cylinder 8.
is interposed.

When the stopper 12 is screwed in, the valve stem 9 of the cylinder 8 comes into contact with the contact member 10 and is pushed down, keeping the built-in valve in an open state.

Therefore, the carbon dioxide gas in the cylinder 8 is transferred to the empty space 7a and the supply pipe 5.
filled within.

The backing 14 prevents carbon dioxide gas from escaping from the cavity 7b through the threaded portion of the stopper 12.

In the above configuration, if the oil ignites and bursts into flames due to the reasons mentioned above while refueling with the nozzle, the heat of the fire will cause the stopper 15 to explode.
is dissolved and carbon dioxide is ejected from the pipe 5 to extinguish the fire.

In the illustrated example, a plug 15 is provided at the outer end 5b of the inert gas or extinguishing agent supply pipe 5, but instead a manual valve 16 (shown by a chain line in FIG. 1) is provided at an appropriate position in the middle of the pipe 5. ), and this valve 16 may be opened as necessary.

Further, in the illustrated example, the pipe 5 is placed along the outside of the nozzle tip pipe 3, but it may be provided within the nozzle passage.

Furthermore, in the illustrated example, the carbon dioxide cylinder 8 is built into the grip of the nozzle body, but the configuration is not limited to this (for example, it may be built into another part of the nozzle, or it may be built outside the nozzle or through a hose). It can be attached to the weighing machine, or it can be attached to the weighing machine or other place.

The inert gas is not limited to carbon dioxide, and it is of course possible to use liquid, foam, and other extinguishing agents as well as gas.

Since the present invention is configured as described above, even if a fire occurs while flammable fluid is being supplied, the fire can be extinguished quickly and easily.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a part of an embodiment of the present invention in longitudinal section, and FIG. 2 is a sectional view taken along the line AA in FIG. 2... Negative pressure compensation pipe, 3... Nozzle tip pipe, 4... Groove, 5... Inert gas or extinguishing agent supply pipe, 6... ...Grip part, 7a, 7
b...Blank, 8...Cylinder, 9...
...Valve stem, 12...Screw plug, 14...
... Backing, 15 ... Plug of thermofusible material, 16 ... Manual valve.

Claims (1)

[Scope of Claims] 1. A nozzle characterized in that the open end of a pipe connected to an inert gas or extinguishing agent supply source is arranged near the tip of the nozzle cylinder. 2. A nozzle, characterized in that an open end of a pipe to which an inert gas or extinguishing agent is constantly supplied is arranged near the tip of the nozzle cylinder, and the open end is sealed with a thermofusible material.