JPH0597198A - Oil feeding nozzle - Google Patents

Abstract

PURPOSE:To recover vapour with good response only during oil feeding, by providing a valve in a pipe line connecting a vapour collector covering the opening of an oil receiving tank at the periphery of a delivery pipe, to a vapour collecting pipeline along an oil feeding hose and further, connecting this valve to a diaphragm. CONSTITUTION:When a nozzle lever is opened while feeding oil, the oil fed from the oil feeding path 57a of a double tube 57 passes through the nozzle body and the oil is discharged from a discharge pipe 24 through an opened check valve. And the diaphragm 31 is expanded outward due to the pressure of a liquid chamber to open a vapour valve 36 to recover the vapour from the vapour collector 25 to the vapour collecting pipe 57b of the double tube 57. On the other hand, when oil feeding proceeds more and the liquid level closes the opening, the negative pressure in a vacuum generating part, which is not illustrated, acts on another diaphragm chamber to expand it to the outside. As the result, the bar is raised and since the small diameter part is positioned at the small ball, the bar is relieved from fitting and the nozzle lever is returned back to the closing position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply nozzle of an oil supply device equipped with a vapor recovery device installed in a gas supply station such as a gas station.

[0002]

2. Description of the Related Art The applicant of the present invention has proposed a fueling nozzle in Japanese Patent Application No. 3-61915. This will be described with reference to FIGS. In FIG. 5, a refueling machine 50 provided with a refueling nozzle N includes a case 51 standing upright on the ground, and an underground tank 52 is buried underground.

An oil supply pipe 53 extends from the underground tank 52 into the case 51. A pump 54 and a flow meter 55 are connected in series to the oil supply pipe 53, and the flow meter 5
The oil amount measured in 5 is displayed on the display 56.

A double hose 57 is connected to the oil supply pipe 53 via an elbow 82. The hose 57 is supported by a flexible support column 58 provided upright on the case 51 and folded back to provide oil at the tip thereof. The nozzle N is connected.

A vapor collector 25 (FIG. 6), which will be described later, is provided in the refueling nozzle N in order to collect the vapor generated in the tank of the automobile during the refueling work. The elbow 82 is sucked by the blower 81 and passes through the vapor recovery path of the double hose 57.
At this point, it flows into the vapor pipe 80 and is collected in the underground tank 52. In FIG. 5, solid arrows indicate the flow of oil, and dotted lines indicate the flow of vapor.

The pump 54 and the blower 81 are driven / stopped by a switch SW which is interlocked with the engagement / disengagement of the oil supply nozzle N with respect to the nozzle hook.

As shown in FIG. 6, the oil supply nozzle N is composed of a cylinder tip portion 20A, a cylinder body portion 10A and a grip portion 2A.

The cylinder tip portion 20A is a portion to be inserted into a fuel filler port of an automobile and is provided with a discharge pipe 24 having a fuel filler port engaging piece 24a. A vapor collector 25 made of oil resistant rubber or the like is provided on the outer circumference of the discharge pipe 24. A vapor recovery pipe 26 opens at an end position of the vapor collector 25. As shown in the drawing, the recovery pipe 26 is arranged outside the barrel portion 10A.

The discharge pipe 24 of the barrel tip portion 20A fluidly communicates with the barrel body portion 10A, and the main valve 62 is provided in the barrel body portion 10A.
Is provided. The main valve 62 is movable in the axial direction and abuts on the valve seat at the position shown in the figure so that oil does not flow. However, the refueling lever 63 is pulled to rotate counterclockwise around the fulcrum 64, and the lever 63 moves to the valve rod 65.
The main valve 62 opens when the pin of is moved to the right.

The vapor recovery pipe 26 is provided along the outside of the barrel portion 10A, and at the upper portion of the refueling nozzle N, the spring 7 is provided.
The passage is opened and closed by a vapor valve 71 urged in the closing direction at 0. When the vapor valve 71 operates the refueling lever 63 to refuel, the lever operating end 72 opens the vapor valve 71 by causing the rod 73 of the vapor valve 71 to move leftward. Therefore, during refueling, the vapor valve 71
Opens and collects the vapor. The vapor recovery pipe 26 communicates with the vapor recovery passage downstream of the vapor valve 71.

[0011]

In the refueling nozzle N, the vapor valve 71 is always open when the main valve 62 is open. Therefore, in the case of preset refueling, even if the main valve in the refueling machine is closed and refueling is completed, the suction of vapor is continued until the refueling lever 63 is returned and the vapor valve 71 is closed. This lowers the internal pressure of the tank to be fed, and is not preferable. Further, the air is sucked through the gap between the vapor collectors 25, which imposes a heavy burden on the vapor processing.

On the other hand, in US Pat. No. 4,429,725,
A technique relating to a nozzle in which a vapor return pipe is connected to a vacuum pump and a valve which is opened by hydraulic pressure at the start of refueling is provided in a pipe line is shown. However, in this technique, since there is no vapor collector, air is sucked in, and since the pipe line is a thin pipe, the responsiveness of opening the valve is poor.

It is an object of the present invention to provide an oil supply nozzle which recovers vapor with good response only during oil supply.

[0014]

According to the present invention, a pipe connecting a vapor collector provided around a discharge pipe and covering an opening of a tank to be refueled and a vapor recovery passage arranged along a refueling hose. A valve is provided in the middle of the passage, and a valve rod of the valve is planted in a diaphragm provided so as to cover a side surface opening of the nozzle body between the main valve and the check valve.

It is preferable that the diaphragm is provided on the side of the automatic closing mechanism and that the valve is closed by the closing pressure of the check valve.

[0016]

In the refueling nozzle constructed as described above, when refueling is stopped, the diaphragm is deformed to close the valve and stop the vapor recovery. This diaphragm is
The responsiveness is very good because it is provided directly on the side surface of the fueling nozzle.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a double hose 57 is provided at the base end of the grip portion 2 of the nozzle body 1, and a main valve 4 which is seated on and off the valve seat 3 is provided on the opposite side. And is biased in the valve closing direction by a spring 7 interposed between the nozzle body 1 and a cover 6 fixed to the nozzle body 1. The valve rod 5 of the main valve 4 is projected to the outside of the nozzle body 1, and its end is engaged with the base of a nozzle lever 8 pivotally attached to the end of a sliding rod 17 of an automatic closing mechanism A described later. There is. Reference numeral 9 in the drawing is a latch for holding the valve open.

An automatic closing mechanism A according to a known technique (Japanese Utility Model Publication No. Sho 36-17872) is provided in the barrel portion 10 formed continuously with the grip portion 2 of the nozzle body 1. .. A boss portion 12 perpendicular to the flow direction is formed in the liquid chamber 11 of the cylindrical body portion 10, and a diaphragm chamber 14 is defined by a cover 13 on the cover 6 side.
In the diaphragm chamber 14, a diaphragm 16 biased inward by a spring 15 is stretched. On the other hand, a sliding rod 17 is slidably housed in the inner hole of the boss portion 12 and is biased toward the diaphragm 16 by a spring 15a.
The head portion 18a, the taper portion 18b and the small diameter portion 18c of the rod 18 attached to the diaphragm 16 are the sliding rod 1
It is inserted in the inner hole of No. 7. A small hole 17a is formed in the sliding rod 17 at right angles to the axial direction. A small ball 19 is provided in the small hole 17a, and the small ball 17a is sandwiched between the head portion 18a and the boss portion 12 to slide. The rod 17 is locked.

A cylinder tip portion 20 is provided continuously with the cylinder body portion 10. The main body 21 of the barrel tip portion 20 has the barrel body portion 1
A check valve 22 biased by a spring 23 is provided on the liquid chamber 11 side, and a discharge pipe 24 having a filler opening locking piece 24a is fixed on the opposite side. There is. A vapor collector 25 made of oil resistant rubber or the like is provided on the outer circumference of the discharge pipe 24. The vapor collector 2
The tip portion 25a of No. 5 spreads like a trumpet, facilitates sealing with the fuel filler port of the automobile, and collects the vapor. A vapor recovery pipe 26 is opened at an end position of the vapor collector 25, and the vapor recovery pipe 26 is communicated with a diaphragm chamber 32 of a vapor valve portion indicated by reference numeral 30. A flame arrester 27 such as a wire mesh is provided in the middle of the vapor recovery pipe 26.

In the vapor valve portion 30, a diaphragm chamber 32 defined by a diaphragm 31 and a partition wall 35 that covers the lateral opening of the liquid chamber 11 of the barrel portion 10, and a diaphragm chamber 3 are provided.
2 and a chamber 33 on the side of the double hose 57 are connected to each other via a pipe 34 and a vapor passage 2a formed inside the grip portion 2. The valve seat 35a formed on the chamber 33 side of the partition wall 35 is provided with a vapor valve 36 that is seated on and off. The valve rod 37 of the valve 36 is projected toward the diaphragm chamber 32 side,
The end is planted in the diaphragm 31, and the spring 38
Is urged in the valve closing direction.

On the other hand, the diaphragm chamber 1 of the automatic closing mechanism A
4 communicates with the negative pressure generating portion 40 formed in the main body 21 of the cylinder tip portion 20 through the communication passage 39.
Is the opening 4 near the tip of the discharge pipe 24 by the communication pipe 41.
It is connected to 2. The vapor valve 36 is connected to the liquid chamber 1
The pressure of No. 1 is closed by the pressure at which the check valve 22 is closed (FIG. 3), and the diaphragm 31 is expanded and opened outward during refueling, that is, the pressure at which the check valve 22 is opened (FIG. 4).

Next, the operation will be described. When refueling,
When the nozzle lever 8 is pulled and hooked on the latch 9, the nozzle lever 8 rotates counterclockwise with the base end of the sliding rod 17 as a fulcrum, and the main valve 4 is opened. Therefore, the oil from the oil supply passage 57a of the double pipe 57 passes through the nozzle body 1 and the check valve 22a.
And is discharged from the discharge pipe 24. At the same time, liquid chamber 1
The diaphragm 31 bulges outward by the liquid pressure of 1, the vapor valve 36 is opened, and the vapor from the vapor collector 25 is recovered through the vapor recovery passage 57b of the double pipe 57 (FIG. 4). Further, in this state, negative pressure is generated in the negative pressure generating portion 40, but since it communicates with the atmosphere through the communication pipe 41,
Negative pressure does not act on the diaphragm chamber 14.

When refueling progresses and the liquid surface closes the opening 42, the negative pressure of the negative pressure generating portion 40 acts on the diaphragm chamber 14 to suck the diaphragm 16 and bulge it outward. As a result, the rod 18 is pulled up, and the small diameter portion 18c is positioned at the small ball portion 19. Therefore, the locking of the sliding rod 17 by the small balls 19 is released, and the tip of the nozzle lever 8 descends,
The main valve 4 is seated and refueling is automatically stopped. Then, the liquid pressure in the liquid chamber 11 is reduced, the check valve 22 is closed, the diaphragm 31 is returned to the normal state, the vapor valve 36 is closed, and the vapor recovery is immediately stopped.

[0025]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the vapor is recovered only during refueling, the internal pressure of the tank to be refueled is prevented from lowering as in the conventional case, and air is sucked in to vaporize the vapor. It is possible to prevent the processing load from increasing.

Further, since the vapor valve provided by the diaphragm is provided in the fuel supply nozzle body, the responsiveness of starting and ending the vapor recovery can be improved.

Further, since the flame arrester is provided in the vapor recovery path, it is possible to prevent the ignition of the underground tank from the vapor recovery path due to electrostatic sparks.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a top view of FIG. 1 with a part shown in cross section.

3 is a sectional view taken along the line AA of FIG. 1 showing a vapor valve closed state.

FIG. 4 is a sectional view taken along the line AA of FIG. 1 showing a vapor valve open state.

FIG. 5 is a front view of a fuel dispenser embodying the present invention.

FIG. 6 is a cross-sectional view showing a conventional oil supply nozzle.

[Explanation of symbols]

 A ... Automatic closing mechanism 1 ... Nozzle body 2 ... Grip 2a ... Vapor passage 3 ... Valve seat 4 ... Main valve 5 ... Valve rod 6 ... Cover 7. ..Spring 8 ... Nozzle lever 9 ... Latch 10 ... Cylinder body portion 11 ... Liquid chamber 12 ... Boss portion 13 ... Cover 14 ... Diaphragm chamber 15, 15a ... Spring 16 ... Diaphragm chamber 17 ... Sliding rod 18 ... Rod 18a ... Head 18b ... Tapered portion 18c ... Small diameter portion 19 ... Small ball 20 ... Tube tip 21・ ・ ・ Main body 22 ・ ・ ・ Check valve 23 ・ ・ ・ Spring 24 ・ ・ ・ Discharge pipe 24a ・ ・ ・ Filling port locking piece 25 ・ ・ ・ Vapor collector 25a ・ ・ ・ Tip 26 ・ ・ ・ Vapor recovery pipe 27 ... Flame arrester 30 ... Vapor valve part 31 ... Diaphragm 32 ... Da Yafram chamber 33 ... chamber 34 ... pipe 35 ... partition wall 35a ... valve seat 36 ... vapor valve 37 ... valve rod 38 ... spring 39 ... communication passage 40 ... Negative pressure generating part 41 ... Communication pipe 42 ... Opening part 50 ... Refueling machine 51 ... Case 52 ... Underground tank 53 ... Refueling pipe 54 ... Pump 55 ... Flowmeter 56 ... Display 57 ... Double pipe 57a ... Refueling passage 57b ... Vapor recovery passage 58 ... Strut 59 ... Nozzle hook 62 ... Main valve 63 ... Refueling lever 64.・ ・ Support point 65 ・ ・ ・ Valve rod 70 ・ ・ ・ Spring 71 ・ ・ ・ Vapor valve 72 ・ ・ ・ Operating end 73 ・ ・ ・ Rod 80 ・ ・ ・ Vapor pipe 81 ・ ・ ・ Blower 82 ・ ・ ・ Elbow

Claims (1)

[Claims] 1. A valve is provided in the middle of a pipe line that connects a vapor collector that is provided around a discharge pipe and covers an opening of an oil supply tank and a vapor recovery line that is provided along an oil supply hose. The oil supply nozzle characterized in that the valve rod is planted in a diaphragm provided so as to cover an opening on the side surface of the nozzle body between the main valve and the check valve.