JPH0128078Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a refueling nozzle used when supplying oil such as gasoline to automobiles at a refueling station. This is effective in automatically closing the valve that is left open and preventing oil from naturally flowing out into the nozzle primary flow path.

(B) Prior Art In recent years, oil supply devices have come into use that stop the pump or close the oil supply line using a solenoid valve or the like to end the oil supply when a pre-specified amount of oil is reached. However, at the end of this refueling, the valve that opens and closes the nozzle flow path remains open, so if the nozzle primary side pipe line is higher than the nozzle position, the oil accumulated in this part will be removed. This causes inconveniences such as the oil flowing out after refueling is completed, and more oil than expected being refueled and overflowing from the container. Note that nozzles with a mechanism that automatically closes when full are equipped with an auxiliary valve in the flow path to generate negative pressure, but this auxiliary valve is biased by a spring in the direction of closing the flow path. However, due to its functionality, it is not capable of completely blocking the flow path, making it difficult to eliminate the above-mentioned problems.

(c) Purpose The purpose of this application is to use a valve body that is provided for the purpose of closing the flow path itself and has a complete sealing function to ensure reliable sealing when oil supply is stopped.

(d) Structure and operation The structure for achieving the above object includes a valve body that is biased in the direction in which fluid pressure acts in the oil flow path that flows through the nozzle body, and a valve body that is provided downstream of the valve body. A nozzle comprising a valve seat on which a valve body is seated, a lever for opening and closing the valve body, and a means for locking the valve body in an open position, wherein the valve seat is movable in the direction of displacement of the valve body. The valve seat is equipped with a means for biasing the valve seat toward the valve body with a force lower than the fluid pressure, so that even if the oil supply is stopped with the valve body open, the valve seat will not be displaced toward the valve body. , close the oil flow path.

(e) Example In Fig. 1, 2 is the main body of the nozzle, and 4 is the flow path 6.
The main valve (valve body) that opens and closes, and its sealing part is made of a material such as rubber. 8 is a lever. In conjunction with the operation of this lever, the valve stem 10 is moved by a spring 11 to the left in the figure. Sub-valve 12 biased toward
The main valve 4 also moves to open the main valve 4 when the stepped portion 14 comes into contact with the main valve 4.

A cylindrical valve seat 16 is always urged toward the main valve 4 by a spring 18 which is weaker than the spring 11 and weaker than the fluid pressure in the flow path.

Reference numeral 20 denotes an auxiliary valve, which slides against the large diameter portion 22 of the valve shaft 10 and is biased by a spring 24 in the direction of contacting the orifice 26 of the flow path 6.
Reference numeral 8 denotes a seal ring fitted around the outer periphery of the valve seat 16, 30 a small hole bored in the main valve 4 and communicating the primary side flow path and the secondary side flow path of the main valve 4, and 32 a small hole formed in the main valve 4. The small diameter part of the sliding valve shaft 10, 34 is a discharge pipe inserted into the opening of the container during refueling, and A and B are stages on which the tip 9 of the lever 8 formed on the lever guard 36 is hooked, and the lever 8 is shown in the figure. Each time the main valve 4 is displaced from the position to stage A and stage B, the main valve 4 is moved to the right and the flow path is widened.

38 is a filling automatic closing mechanism including a diaphragm 40, which closes the main valve 4 by utilizing the negative pressure generated when oil passes through the orifice 26.
Note that the configuration of this automatic closing mechanism is a well-known matter, so a detailed explanation will be omitted.

In the above configuration, the explanation will be given below based on FIGS. 2 to 4. FIG. 2 shows the state when the lever 8 is in the position indicated by the solid line in FIG. The valve seat 16 and the main valve 4, and the main valve 4 and the sub-valve 12, regardless of whether the pressure (omitted) is applied or not.
are in close contact with each other, and the flow path 6 is completely closed.

Next, when pump pressure is applied and the lever 8 is pulled (displacing the tip 9 upward in FIG. 1), the valve shaft 10 moves to the right and first the secondary valve 12 is Since a part of the pump pressure acting on the main valve 4 is released through the small hole 30, by further pulling the lever 8, the stepped portion 14 is moved. The main valve 4 is pushed to the right and the main valve 4 is easily moved away from the valve seat 16.

When the lever 8 is pulled and its tip 9 is hooked onto the stage B, the main valve 4 is then brought to the position shown in FIG. At this time, the valve seat 16 attempts to move toward the main valve 4 due to the elasticity of the spring 18, but is stopped at the illustrated position by the force of the oil flowing through the flow path 6, and oil supply continues. At this time, the auxiliary valve 20 is also brought to the illustrated position due to the force of the oil.

In the state shown in FIG. 3, when the pump pressure is no longer applied to the flow path 6 by stopping the pump during refueling or closing the pipe line leading to the nozzle with a solenoid valve, etc., the valve seat 16 is moved by the elastic force of the spring 18. , it moves to the right and first contacts the main valve 4, then moves further to the right and also contacts the main valve 4 and the sub-valve 12, and then the fourth
It will be in the state shown in the figure.

At this time, between the valve seat 16 and the main valve 4, the main valve 4 and the sub valve 1
2 is reliably sealed. Therefore, there is no fear that the oil accumulated in the primary flow path of the main valve 4 will leak out. Thereafter, when the lever 8 is removed from stage B and returned to the solid line position in FIG. 1, the valve seat 16 and the main valve 4 are returned to the state shown in FIG. 2.

(F) Effect As detailed above, since the valve seat is configured to be movable in the direction of the main valve and to be constantly biased in the direction of the main valve, when the pump pressure stops acting, the original flow is reduced. Closing is performed using a valve body that has a sealing function that is provided for the purpose of closing the path itself, so a reliable seal can be achieved and there is no possibility of oil leaking and overflowing from the container due to more oil being supplied than expected. This can prevent any inconvenience.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main part of the nozzle of the present invention, and Figures 2, 3, and 4 are respectively when the lever is in the closed position, pump pressure is applied, and the lever is in the open position. FIG. 3 is a diagram showing the state of the main valve and valve seat when the pump pressure is gone and the lever is in the valve open position. 4...Main valve, 10...Valve stem, 16...Valve seat.

Claims (1)

[Scope of utility model registration request] A valve element that is biased in the direction in which fluid pressure acts on an oil flow path that flows through the nozzle body, a valve seat that is provided downstream of the valve element and on which the valve element is seated, and a lever that opens and closes the valve element. and a means for locking the valve body in the valve open position, the valve seat being movable in the direction of displacement of the valve body, and the valve seat being moved in the direction of the valve body at a flow pressure lower than the fluid pressure. A refueling nozzle with means for energizing.