JPH0664696A - Oil feeding nozzle - Google Patents

Abstract

PURPOSE:To enable collection of vapor only during an oil feeding operation according to a flow rate by associating opening and closing of a vapor control valve with opening and closing of a check valve. CONSTITUTION:When oil is going to be fed, a nozzle lever 8 is pulled and hung on a latch 9. Then the nozzle lever 8 pivots counterclockwise around a base end of a pulse rod 17 to open a main valve 4. As a result, oil from an oil feeding passage 57a of a double pipe 57 flows through a nozzle body 1, opens a check valve 22 and then is discharged out of a discharging pipe 24. At the same time, by a movement of the check valve 22, a vapor control valve 33 is also opened, so that vapor from a vapor passage 2a is collected through a front chamber 30, a rear chamber 31, a vapor collecting pipe 34, the vapor passage 2a and the double pipe 57b. At this time, a collecting amount of vapor is in proportion to the moving amount of the check valve 22, that is, the flow rate of the oil. When the oil feeding proceeds and a liquid level rises high enough to close an opening 42, negative pressure of a negative pressure generating part 40 attracts a diaphragm 16, whereby the main valve 4 is seated. Thus, the oil feeding is stopped, the check valve 22 is closed, and therefore, the vapor valve 33 is also closed.

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 type of oil supply nozzle will be described with reference to the drawings. In FIG. 3, a refueling machine 50 provided with a refueling nozzle N is provided with a case 51 standing upright on the ground, and an underground tank 5 is provided underground.
2 is buried.

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 amount of oil 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 (see FIG. 1), which will be described later, is provided in the refueling nozzle N in order to recover the vapor generated in the tank of the vehicle during the refueling work. Blower 81
Flowed through the vapor recovery passage of the double hose 57 into the vapor pipe 80 at the elbow 82, and the underground tank 5
It is supposed to be collected in 2. In FIG. 3, 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.

[0007]

Other than the above-mentioned blower 81, the vapor is collected by a vacuum pump. These blowers and vacuum pumps are always operating while the fueling nozzle is removed from the nozzle hook. Therefore, air is sucked in place of the vapor during the period from the time when the refueling nozzle is removed to the time when the refueling is started and the time after the refueling is finished and the time when the refueling nozzle is applied. Further, when the flow rate is small and the amount of vapor is small, there is a disadvantage that air is sucked together with the vapor.

An object of the present invention is to provide an oil supply nozzle for collecting vapor only during oil supply and according to the flow rate.

[0009]

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 with a vapor recovery passage arranged along a refueling hose. A vapor control valve is provided in the middle of the path, and the opening / closing of the vapor control valve is linked to the opening / closing of the check valve.

[0010]

In the refueling nozzle configured as described above, as the flow rate increases, the valve opening amount of the check valve increases,
Therefore, the valve opening amount of the vapor control valve linked to the check valve also becomes large. As a result, the amount of vapor recovery is proportional to the flow rate.

[0011]

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

In FIG. 1, a double hose 57 is provided at the base end portion of the grip portion 2 of the nozzle body 1, and a main valve 4 which separates from and seats on a valve seat 3 is provided on the opposite side, and a nozzle is provided. It is biased in the valve closing direction by a spring 7 that is interposed between the cover 6 fixed to the main body 1 and the cover 6. The valve rod 5 of this main valve 4 is
The nozzle body 1 is projected to the outside, 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. Reference numeral 9 in the drawing is a latch for holding the valve open.

A body portion 10 formed continuously with the grip portion 2 of the nozzle body 1 is provided with an automatic closing mechanism A according to a known technique (Japanese Utility Model Publication No. 36-17872). A boss portion 12 perpendicular to the flow direction is formed in the liquid chamber 11 of the 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 urged inward by a spring 15 is stretched. On the other hand, the boss 12
A sliding rod 17 is slidably accommodated in the inner hole of the spring 1
It is urged toward the diaphragm 16 by 5a. Then, the head 18 of the rod 18 attached to the diaphragm 16
The a, the tapered portion 18b and the small diameter portion 18c are inserted into the inner hole of the sliding rod 17. A small hole 17a perpendicular to the axial direction is formed in the sliding rod 17, and the small hole 17a is
A small ball 19 is provided, sandwiched between the head portion 18a and the boss portion 12, and the sliding rod 17 is locked.

A barrel tip portion 20 is provided continuously to the body portion 10. The main body 21 of the barrel tip portion 20 is fixed to the body portion 10, a check valve 22 biased by a spring 23 is provided on the liquid chamber 11 side, and a fuel filler port locking piece 24a is provided on the opposite side. The discharge pipe 24 having the is fixedly installed. A vapor collector 25 made of oil resistant rubber or the like is provided on the outer circumference of the discharge pipe 24. The tip portion 25a of the vapor collector 25 spreads like a trumpet, facilitates sealing with the fuel filler port of the automobile, and collects the vapor. A vapor recovery pipe 26 opens at an end position of the vapor collector 25, and the vapor recovery pipe 26 is connected to a front chamber 30 described later.

Referring also to FIG. 2, the valve rod 2 of the check valve 22.
2a is a support portion 27 of the valve box 60 fixedly installed in the main body 21.
It is slidably supported by. The valve box 60 has a cylinder tip 2
A front chamber 30 on the 0 side and a rear chamber 31 on the opposite side are defined. The valve seat 3 is provided between the front chamber 30 and the rear chamber 31.
2 is formed in the valve seat 32, and a vapor control valve 33 fixed to the valve rod 22a is attached to the check valve 22 as shown.
Is seated when the valve is closed. The vapor recovery pipe 26 is opened in the front chamber 30, and the vapor recovery pipe 34 opened in the rear chamber 31 is connected to the double pipe 57 via the paper path 2a of the grip portion 2.
Is connected to a vapor recovery passage 57b surrounding the oil supply passage 57a.

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 by the communication passage 39.
Is the opening 4 near the tip of the discharge pipe 24 due to the communication pipe 41.
It is connected to 2. The double pipe 57 may be connected to the side of the barrel body 20 instead of being connected to the grip 2.

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 opens. Therefore, the oil from the oil supply passage 57a of the double pipe 57 passes through the nozzle body 1 and the check valve 22.
And is discharged from the discharge pipe 24. At the same time, the movement of the check valve 22 opens the vapor control valve 33 so that the vapor from the vapor collector 25 is transferred to the front chamber 30, the rear chamber 31, the vapor recovery pipe 34, the vapor passage 2a and the vapor recovery passage 57b of the double pipe 57. Collect through. At this time, the amount of vapor recovery is proportional to the amount of movement of the check valve 23, that is, the flow rate.
Further, in this state, a negative pressure is generated in the negative pressure generating portion 40, but since the communication pipe 41 communicates with the atmosphere, the 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 ball 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 lowered, the check valve 22 is closed, and therefore, the vapor control valve 33 is closed to immediately stop the vapor collection.

[0019]

Since the present invention is constructed as described above, the vapor is collected only while the fuel is being supplied, and the vapor is collected according to the flow rate.
Suction of air is almost eliminated, and vapor is not released into the atmosphere due to insufficient suction.

[Brief description of drawings]

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

FIG. 2 is a side sectional view showing a vapor control valve and its surroundings.

FIG. 3 is a front view of a fuel dispenser embodying the present invention.

[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 ... Body 11 ... Liquid chamber 12 ... Boss 13 ... Cover 14 ... Diaphragm chamber 15, 15a ... Spring 16 ... Diaphragm 17 ... Sliding rod 17a ... Small hole 18 ... Rod 18a ... Head 18b ... Tapered portion 18c ... Small diameter portion 19 ... Small ball 20 ...・ Cylinder tip part 21 ・ ・ ・ Main body 22 ・ ・ ・ Check valve 22a ・ ・ ・ Valve rod 23 ・ ・ ・ Spring 24 ・ ・ ・ Discharge pipe 24a ・ ・ ・ Filling port locking piece 25 ・ ・ ・ Vapor collector 25a ・ ・ ・Tip part 26 ... Vapor recovery pipe 27 ... Support part 30 ... Front chamber 31 ... Rear chamber 32. -Valve seat 33 ... Vapor control valve 34 ... Vapor recovery pipe 35 ... Oil seal 39 ... Communication passage 40 ... Negative pressure generating portion 41 ... Communication pipe 42 ... Opening 50 ... Refueling machine 51 ... Case 52 ... Underground tank 53 ... Refueling pipe 54 ... Pump 55 ... Flowmeter 56 ... Display 57 ... Double pipe 57a ... Refueling Channel 57b ... Vapor recovery channel 58 ... Struts 59 ... Nozzle hook 60 ... Valve box 80 ... Vapor pipe 81 ... Blower 82 ... Elbow

Claims (1)

[Claims] 1. A vapor control valve is provided in the middle of a pipe line connecting a vapor collector provided around a discharge pipe and covering an opening of an oil supply tank and a vapor recovery line arranged along an oil supply hose, A refueling nozzle characterized in that the opening and closing of the vapor control valve is interlocked with the opening and closing of a check valve provided in the liquid passage.