JPS5910075Y2 - 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 comes off and is sprayed all over the place.

This is especially dangerous if the sprayed oil is highly flammable and explosive, such as gasonone.

In order to prevent such a danger, a safety valve has been proposed in which when a tensile force above a certain level is applied to the connection between the nozzle and the refueling hose, the nozzle and the refueling hose separate from each other and the built-in valve closes.

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

Furthermore, the safety valve has drawbacks such as a complicated flow path inside the valve, a large pressure loss, and a decrease in the discharge flow rate from the nozzle, and is also expensive.

This idea prevents danger by automatically closing the nozzle valve in the event of an accident like the one mentioned above. It also allows for easy modification of conventional nozzles, does not reduce the discharge flow rate, and is inexpensive and easy to operate. It provides a liquid supply nozzle.

The illustrated embodiment will be described below.

In the figure, 1 is a nozzle main body, 2 is a flow path passing through this main body, 3 is a refueling hose, and 4 is a main valve for opening and closing the flow path 2, which is held on a valve shaft 7.

8 is an operating rod that operates the main valve 4 via the valve shaft 7. When the trigger lever 9 is pulled with a fingertip and rotates around the support shaft 10, the operating rod 8 moves forward and opens the main valve body 4. .

At this time, as is well known, the sub valve 5 opens first and the main valve 4 opens.
The pressure on the primary side of the main valve 5 is reduced to make it easier to open the main valve 5.

9F is a hole into which a fingertip is inserted. Reference numeral 11 is a claw rod connected to the lower part of the nozzle body 1, and the lever 9 is hooked with a claw K to maintain the lever 9 in the pulled rotational position.

Reference numeral 14 denotes a tip pipe attached to the tip of the nozzle body 1, which is used to supply oil from the flow rate 2 to, for example, a vehicle to be oiled.

The feature of this invention is that the support shaft 10 of the lever 9 is connected to the nozzle body 1.
The tip pipe 14 is installed so as to be displaceable in the longitudinal direction with respect to the nozzle body 1, and the tip pipe 14 is installed so as to be displaceable in the longitudinal direction with respect to the nozzle body 1. This is done by displacement of the pipe.

That is, the support shaft 10 at the upper end of the lever 9 is inserted into an elongated guide groove 1M formed in the nozzle body 1.

In the state shown in FIG. 1, the support shaft 10 is located above (to the right) of the guide groove 1M, and is restricted by a restriction piece 23 that is rotatable about a support pin 24.

That is, the tip inclined side 23' of the regulating piece 23 is aligned with the guide groove 1.
It advances to position M and regulates the displacement of the support shaft 10.

However, as will be described later, when the tip pipe 14 is displaced and the following lever 22 retreats to the left as shown in FIG. Due to the repulsive force of the spring 6 and the hydraulic pressure acting on the support shaft 10, the support shaft 10 is displaced to the left along the guide groove 1M, resulting in the state shown in FIG.

In this state, the main valve 4 returns to its position and closes the flow path 2 as shown.

That is, if the tip pipe 14 is displaced during refueling, the main valve 4
automatically closes the flow path 2.

The tip pipe 14 is attached to the nozzle body 1 so as to be freely displaceable in the longitudinal direction (axial direction).

That is, 13 is a connector attached to the tip (left end) of the nozzle body 1, which includes a packing 17 that seals against the tip pipe 14, a packing 17' that seals against the nut 12, and a connector that is inserted with a certain force. It has a sphere 18 for holding it.

Therefore, when the tip pipe 14 is inserted as shown in FIG.
H to maintain the connection between the tip pipe 14 and the nozzle body.

On the other hand, a ring body 19 is fixed to the base end (right side part) of the tip pipe 14 by a stopper 20, and the following rod 22 is connected above the ring body 19 via a connecting pin 21. ing.

In the above-described structure, if the refueled vehicle starts moving during refueling and the tip pipe 14 or the nozzle body is pulled with a force exceeding the set value, the ball 18 will cause the hole 14H of the tip pipe to be pulled out, as shown in FIG. The peripheral edge in the vicinity is deformed or destroyed, the tip pipe 14 is displaced or separated from the nozzle body 1, and the follower rod 22 is pulled to the left.

This displacement of the follower rod 22 causes the restriction of the support shaft 10 by the restriction piece 23 to be released as shown in FIG. will be stopped.

The features of this invention are as described above, but are not limited to the illustrated example.

For example, the structure and shape of the restricting means for the support shaft of the operating lever are not limited to the illustrated example.

The control mechanism for releasing the restricting means is not limited to the following rod as shown in the illustrated example, but a mechanism suitable for the structure of the restricting means may be adopted.

It is also possible to apply this method to applications other than refueling nozzles.

This idea has been described in detail above, so if the tip pipe is inserted into a nozzle that opens and closes the liquid supply path using a manual operation lever, an abnormality may occur on the supplied liquid side during liquid supply and the tip pipe may be pulled. Even if an accident occurs, liquid supply can be automatically and quickly stopped, and this can be done with extremely simple precautions.

The nozzle itself can also be provided at low cost without increasing its size and complexity.

[Brief explanation of the drawing]

Figure 1 is a front view showing a part of an embodiment of this invention in longitudinal section, Figure 2 is a sectional view of the main part, Figure 3 is a diagram showing the connection between the tip pipe and the nozzle body, and Figure 4. 3 is a diagram showing a state in which the tip pipe is displaced and detached from FIG. 3; FIG. 1... Nozzle body, 2... Channel, 4...
...Main valve, 7...Valve stem, 8...
Operating rod, 9...Trigger lever, 10...
...Spindle, 13...Connector, 14...
...Tip pipe, 17, 17'...Packing,
18... Sphere, 19... Ring, 20.
... Stopper, 21 ... Connection pin, 22.
...Following rod, 23...Regulation piece, 24...
...Support pin.

Claims (1)

[Scope of utility model registration request] In a liquid supply nozzle in which a built-in valve that opens and closes a through-flow passage is opened and closed by lever operation, the nozzle tip pipe is attached to the nozzle body so that it can be displaced relative to the nozzle body by a tensile force that is greater than a set value applied between the two, and the above-mentioned method is used. means for displaceably attaching a lever support shaft to the nozzle body so that displacement of the lever support shaft causes the valve to close, and for normally regulating displacement of the lever support shaft; and a means for normally regulating displacement of the lever support shaft; and means for releasing the regulation of the lever support shaft by the regulation means in response to the relative displacement of the nozzle body.