JPS6020638Y2 - Liquid supply nozzle - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a nozzle for a liquid supply device such as a fuel supply device used at a gas station or the like.

Conventionally, one problem with this type of refueling system is that during refueling, the vehicle being refueled suddenly moves and the nozzle is pulled and the refueling hose is torn off, or the connection between the nozzle and the refueling hose or the refueling hose and the refueling device is damaged. Occasionally, accidents occur where a large amount of oil is sprayed onto the ground.

It is especially dangerous if the sprayed oil is highly flammable and explosive, such as gasoline.↓ To prevent this danger, if a tensile force above a certain level is applied to the connection between the nozzle and the refueling hose, they will A safety valve has been proposed in which a built-in valve closes when separated.

However, when such a safety valve is provided internally, the entire nozzle becomes heavy and large, making refueling operations difficult.

In addition, the flow path inside the safety valve is complicated, resulting in large pressure loss, and the discharge flow rate from the nozzle is reduced.
It's also expensive.

This invention provides a refueling nozzle that eliminates these conventional drawbacks.

In other words, this invention not only prevents danger by closing the nozzle valve in the event of an accident as described above, but also provides an inexpensive and easy-to-operate refueling system that allows conventional nozzles to be easily modified and does not reduce the discharge flow rate. It provides a nozzle for use.

This invention will be explained below with reference to embodiments shown in the drawings.

1 is a nozzle body, 2 is a flow path penetrating this body, 3
Reference numeral 4 denotes a valve that opens and closes the flow path, and 4 is an opening/closing operation lever that can selectively set the valve 3 between a position in which it is held in an open position and a position in which it is allowed to be in a closed state (the illustrated position).

5 is a diaphragm chamber which is divided by a diaphragm 6 into an upper first compartment (negative pressure generating chamber) 5A and a lower second compartment 5B.

7 is a communication path between the first compartment 5A and the flow path 2 of the nozzle;
It is open to

Reference numeral 8 denotes a tube for negative pressure compensation, which is fixedly inserted into the tip pipe 9 of the nozzle, and has one end communicating with the communication path 7 and the other end 8' opening outward near the opening of the tip pipe 9.

As is well known, when the open end 8' is open to the atmosphere, the generation of negative pressure in the first compartment 5A due to the flow of oil flowing through the flow path 2 when the valve 3 is opened is caused by the tube 8. When the opening end 8' is closed due to the rising oil level in the lubricated device (not shown), the negative pressure generated in the first compartment moves the diaphragm 6 upward. Pull up.

Reference numeral 10 denotes a valve opening/closing mechanism which releases the locking of the operating lever 4 by upward displacement of the diaphragm 6 and enables the valve 3 to be closed by the return of the spring 3S.

Since the above configuration and operation are well known, a detailed explanation will be omitted, but the valve opening/closing mechanism 10 closes the valve 3 by displacing the diaphragm 6 upward from the position shown in FIG. 1 to the position shown in FIG. It works like this.

The present invention allows the upward displacement of the diaphragm 6 to be performed mechanically without relying on negative pressure, and is also made to be performed in response to the displacement or separation of the nozzle tip pipe from the nozzle body. It is something.

For this purpose, the tip pipe 9 and tube 8 are integrally attached to the nozzle body 1 so as to be separable or displaceable.

That is, a connector 10 is fitted on the outflow side of the nozzle body 1, a base 9' of the tip pipe 9 is inserted and fixed into the inner hole at the tip of the connector 10, and the connector 10 is fitted around the outer periphery of the base 9'. A groove 9'' is carved near the tip.

As will be described later, when an external force greater than the set value is applied between the tip pipe 9 and the nozzle body, the tip pipe moves into this base groove 9''.
It breaks and separates from the main body.

Reference numeral 16 denotes a ring fixed to the outside at the insertion portion of the tip pipe 9 into the connector 10.

A diaphragm 6 is provided in the first compartment 5A of the diaphragm chamber 5.
A spring support S is provided above the diaphragm 6, and the elasticity of the spring B acts on the diaphragm 6 to urge it to the position shown in FIG.

The spring receiver S has an operating punch 11 that penetrates the upper wall of the diaphragm chamber 5 and projects outward, and is connected to a connecting portion T and a connecting punch S, which will be described later.
It is attached via T.

F is a flange attached to the upper end of this operating punch 11.

Reference numeral 14 denotes a support pin attached to the protrusion 5' of the diaphragm chamber 5, and a spring 15 is attached to this pin 14.

The left end of the spring 15 is locked below the flange portion F of the operating punch 11, so that the spring 15
As a result, the operating punch 11 is always urged outward (in the projecting direction).

Therefore, the spring receiver S1, the connecting part T1, the connecting part T1, the operating punch 11, and the spring 15 constitute a biasing mechanism that constantly biases the diaphragm 6 in the valve closing direction.

Furthermore, a locking pin 12 is provided in a through hole H provided in another protrusion 5''.
is inserted in a direction substantially perpendicular to the axial direction of the operating punch 11,
The top of the operating punch 11 is normally held down by the locking pin 12, and the operating punch 11 is maintained in the state shown in FIG. 1 despite the biasing force of the spring 15.

Therefore, the protruding portion 5'' and the locking pin 12 form a restraining mechanism that constantly restrains displacement of the biasing mechanism in the valve closing direction.

The left end of the locking pin 12 and the ring 16 are connected to the chain 13
connected by.

As will be clear from what will be described later, the chain 13 and ring 16 constitute a release mechanism that releases the suppression of the biasing mechanism by the suppression mechanism.

As described above, the operating punch 11 is connected to the diaphragm 6 via the connecting portion T and the connecting punch ST.

With this configuration, in the normal state of the nozzle, the diaphragm chamber 5
When the diaphragm 6 is about to be displaced upward by the negative pressure generating chamber in the chamber A, the upper end of the connecting punch ST is in contact with the connecting part T even though the upper end of the operating punch 11 is locked by the locking pin 12. Since it is displaced upward inside, it is possible to close the valve of the valve opening/closing mechanism by generating negative pressure, and when an abnormality occurs (when the nozzle tip pipe is displaced or falls off), the operating punch 1
1 protrudes outward as described later, the spring receiver S and the diaphragm 6 are displaced upward, and the valve opening/closing mechanism can be operated to close the valve without depending on the generation of negative pressure.

Since the configuration of this invention is as described above, the tip pipe 9 is inserted into the oil tank etc. in the state shown in FIG.
The lift valve 3 is opened to the position shown by the two-dot chain line to refuel.

If, for example, the vehicle to be refueled starts to move carelessly during this refueling and a force exceeding the set value is applied to the tip pipe 9, the tip pipe 9 will break at the groove 9'' in the base 9' as shown in Fig. 2, and the nozzle body will break. (connector).

At this time, the locking pin 12 is pulled out of the hole by the chain 13, and the operating punch 11 is displaced upward by the biasing force of the spring 15.

(Figure 2). Due to this displacement, the diaphragm 6 is also displaced upward, and the valve opening/closing mechanism 10 operates to close the valve 3.

In this way, when an external force is applied to the tip pipe 9 and it separates from the nozzle body, a state similar to the generation of negative pressure occurs even if no negative pressure is generated, and the valve 3 closes and oil supply is stopped.

Although the illustrated embodiment has been described above, the present invention is not limited to the illustrated example.

For example, the mechanism for displacing the diaphragm upward and operating the valve opening/closing mechanism when the tip pipe is detached from the nozzle body is not limited to the structure using only a spring, an operating punch, and a locking pin.

Further, in the illustrated example, the tip pipe 9 is broken at the groove 9'' at the base end and separated from the nozzle body, but it is also possible to have a configuration in which the tip pipe is displaced or pulled out from the body.

Since the liquid supply nozzle of this invention is as described in detail above, even if an accident occurs during refueling, the tip pipe can be detached, and the refueling is automatically and quickly stopped due to this detachment, so that the oil can reach the ground. Dangerous situations such as large amounts of spraying can be prevented.

Moreover, the structure is simple and easy to operate without increasing the size and complexity.
It's cheap.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the invention, and FIG. 2 is a diagram showing a state in which the tip pipe of FIG. 1 is separated. 1... Nozzle body, 2... Channel, 3...
...Valve, 4...Lever, 5...
Diaphragm chamber, 6...Diaphragm, 9...
...Tip pipe, 9''...Groove, 10...
...Valve opening/closing mechanism, 11... Operating pestle, 12...
...Lock pin, 13...Chain, 14.
...Support pin, 15 ...Spring, 1
6...Ring, 3S, B...Spring, S...Spring holder, F...Flange, T...Connection part, ST・・・・・・Connected pestle.

Claims (1)

[Scope of utility model registration request] A valve that opens and closes a flow path in the nozzle body, a negative pressure generation chamber that communicates with the flow path and generates negative pressure by the flow of liquid in this flow path, and a negative pressure generation chamber that a valve opening/closing mechanism that automatically closes the valve in conjunction with a diaphragm that is displaced in response to pressure; and a negative pressure that compensates for and prevents the generation of negative pressure by normally communicating the inside of the negative pressure generation chamber with the atmosphere outside of the flow path. In the liquid supply nozzle having a compensation path, the nozzle tip pipe is attached to the nozzle body so as to be separable or displaceable, and a biasing mechanism that constantly biases the diaphragm in the valve closing direction, and a closing mechanism of the biasing mechanism are provided. A suppression mechanism is provided to constantly suppress displacement in the valve direction, and when a force greater than a set value is applied between the nozzle tip pipe and the nozzle body and the nozzle tip pipe is separated or displaced with respect to the nozzle body, this separation or displacement is prevented. A liquid supply nozzle characterized in that the liquid supply nozzle is further provided with a release mechanism that releases the suppression of the biasing mechanism by the suppression mechanism in response to the above.