JPS5912559B2 - Liquid supply 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 near 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, it is an object of the present invention to provide a nozzle equipped with a mechanism for automatically closing the built-in valve of the nozzle in the event of a fire as described above, as well as a fire extinguishing means.

The illustrated embodiment will be described in detail below.

The illustrated nozzle is a trigger type nozzle, and has a handle H attached to the lower part of the nozzle body 1, and an oil supply hose 2 is connected to the rear end via a rotary sealing joint 3.

A nozzle tip pipe 10 is attached to the left end of the nozzle body 1 via a connector 9.

Reference numeral 5 denotes a main valve for opening and closing the liquid supply path 4, which is pressed against the valve seat 1R by a spring S via a sub-valve 5', and closes the liquid supply path 4 when the nozzle is not in use.

6 is a valve operating rod, and when the operating rod 6' inserted at the left end is pushed to the right by the trigger lever 8, the auxiliary valve 5' is slightly opened against the spring S, and the liquid is transferred to the main valve 5. By allowing the water to flow into the secondary side, the main valve 5 can be easily opened by the lever 8.

A support shaft 7 fixed to the upper end of the lever 8 is loosely fitted into a guide groove 26 provided on the upper side of the nozzle body 1, and a finger insertion hole 8H is formed at the lower end of the lever.

A space 2 communicating with a space 27a in the handle H of the nozzle body 1
A cylinder 12 of an inert gas, such as carbon dioxide gas, is housed in the cylinder 7b.

Reference numeral 11 is a valve stem of a built-in valve (not shown) of the cylinder 12, and reference numeral 17 is a contact member disposed at the boundary between the cavities 27a and 27b, which is formed integrally with the backing receiver 13.

14 is a backing. A plug 16 is screwed into the lower end of the handle H of the nozzle body 1, and a helical spring 15 is interposed between the plug 16 and the bottom surface of the cylinder 12.

When the stopper 16 is screwed in, the valve stem 11 of the cylinder 12 comes into contact with the contact member 17 and is pushed down, keeping the built-in valve in an open state.

Therefore, the carbon dioxide gas in the cylinder 12 fills the space 27a and the gas flow path 18.

The backing 14 prevents carbon dioxide gas from escaping from the cavity 27b through the threaded portion of the stopper 16.

One end 18a of the gas flow path 18 opens into a space 27a in the handle H of the nozzle body 1, and the other end 18b is connected to a gas valve 19.

Further, a gas flow path 18' is extended from the gas valve 19 to the vicinity of the connection portion of the nozzle tip pipe 10 with the nozzle body 1.
It opens at 8'b.

A valve operating piece 20 is provided protruding from the upper part of the valve 19.

The support shaft 7 of the lever 8 is connected to the nozzle body 1 by the locking piece shaft 21.
The inner end (lower end) 22 of the lever shaft locking piece 22 fixed to
One end of the guide groove 26 (right end in Figure 1) is locked by a.
is held in

The outer end (upper end) of the lever shaft locking piece 22 projects outward from the nozzle body, and one end of the cable 23 is fixed thereto.

The cable 23 passes through the support member 24 and extends into a longitudinal groove 10a provided on the outer peripheral surface of the nozzle tip pipe 10.
The other end is fixed to the tip of the nozzle tip pipe 10 with a thermofusible member 25.

When the lever 18 is pulled, the support shaft 7 engages the locking piece 22 as described above.
Therefore, the lever 18 rotates counterclockwise around the support shaft 7 and pushes the valve stem actuating rod 6' to the right, causing the valves 5, 5' to be moved by the spring S through the valve stem 6. and a pawl a for locking and holding the lever 18 in the valve opening position against hydraulic pressure.

It is a retaining rod with b.

In the above configuration, if the oil ignites and bursts into flames due to the reasons mentioned above during refueling, the nozzle tip pipe 10 will be damaged by the heat.
The thermofusible member 25 at the tip of the lever is melted, and the cable 23 stretched between the thermofusible member and the lever locking piece 22 becomes slack.

The lever 18 is connected to the valve stem operating rod 6' and the spring S (via the valve stem 6).
When the cable 23 slackens as described above, the lever 18 is moved to the left, closing the valve 5 and stopping the oil supply.
The lever support shaft 7 is moved to the left within the groove 26, pushing the lever locking piece 22 and rotating the locking piece 22 clockwise about the locking shaft 21 as shown in FIG. .

When the lever support shaft 7 moves to the left within the groove 26 as described above,
It hits the valve operating piece 20 and presses it to open the gas valve 19, allowing carbon dioxide gas to flow from the cylinder 12 into the gas flow path 18' through the gas flow path 18 and into the nozzle tip pipe 10 through the opening 18'b. Spray out and extinguish the fire.

In the illustrated example, the gas flow path 18' is provided inside the nozzle tip pipe, but it may also be provided along the outside of the nozzle tip pipe. Although it is built into the handle of the main body, it is not limited to this configuration, for example, it is built into another part of the nozzle, or attached to the outside of the nozzle or to the hose, or attached to the inside of the weighing machine or other place. You can also.

The thermofusible member may be attached to other than the tip of the nozzle tip pipe, that is, in the middle of the cable (also, the cable itself may be made of a thermofusible material).

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

It is also possible to additionally provide a mechanism for manually opening and closing the valve 19 of the gas flow path.

With the present invention configured as described above, even if a fire occurs while flammable liquid is being supplied, the fuel supply can be automatically stopped and the fire can be extinguished quickly and easily.

[Brief Description of the Drawings] Fig. 1 is a front view showing a part of an embodiment of the present invention in longitudinal section, Fig. 2 is a longitudinal sectional view of the main part of the invention, and Fig. 3 is the same as Fig. 1. FIG. 4 is an end view taken along line B-B in FIG. 1. 4... Nozzle flow path, 5... Valve, 7...
...Lever support shaft, 8...Lever, 10.
...Nozzle tip pipe, 11...Valve stem,
12... Inert gas cylinder, 16...
Plug, 18, 18'--Gas flow path, 19...
...Gas valve, 20...Valve actuation piece, 21...
...Locking piece shaft, 22...Lever support shaft locking piece, 2
3...Cable, 25...Thermofusible member,
26...Guide groove of lever support shaft 7, 27a, 2
7b... Blank space, K... Lever holding rod,
a, b...Latching pawl.

Claims (1)

[Scope of Claims] 1. A nozzle having a valve that opens and closes a flow path of the nozzle, a mechanism that opens and closes this valve, and a mechanism that is disposed in association with this opening and closing mechanism and that holds the valve in an open state, wherein the holding mechanism A liquid supply nozzle characterized in that a heat sensitive part is provided in association with the liquid supply nozzle, and is configured to release the valve open holding state of the holding mechanism when the heat sensitive part senses heat of a certain temperature or higher. 2. In a nozzle that has a valve that opens and closes a flow path of the nozzle, a mechanism that opens and closes this valve, and a mechanism that is arranged in association with this opening and closing mechanism and holds the valve in an open state, a heat sensitive part is provided in association with the holding mechanism. and an open end of a gas flow path connected to an inert gas or extinguishing agent supply means is arranged in relation to the tip of the nozzle, and when the heat sensing section senses heat of a certain temperature or higher, the valve of the holding mechanism is held open. A liquid supply nozzle characterized in that the inert gas or extinguishing agent supply means is configured to perform a supply operation when the state is released.