JPH054697A - Oil supply apparatus - Google Patents

Abstract

PURPOSE:To provide an oil supply apparatus which prevents oil vapor in a fuel tank from leaking to an atmosphere at the time of oil supply. CONSTITUTION:An air feed port 5a for feeding air into a fuel tank and a recovery port 5b for recovering oil vapor in the tank 4 at each end are provided at a side of the tip of an oil supply nozzle 5. An oil supply apparatus comprises an air feed pipe 6 and a recovery pipe 7 with the other ends extended along an oil supply hose 3, an air compressor 8 for supplying air to the air feed pipe 6, a tube 20 for sealing a slit between an oil supply port 4a of the tank 4 and the oil supply nozzle 5 and recovery mechanisms 12, 23, 24, 25, 26 for recovering oil vapor via the recovery pipe 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device which is used in a gas station or the like and supplies an oil liquid such as gasoline or light oil to a fuel tank of an automobile or the like.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand for improvement of environmental problems, and a so-called vapor recovery function has been provided to prevent oil vapor generated during refueling from leaking to the outside at a gas station. It is becoming necessary to be prepared. Conventionally, this vapor recovery function has a suction pipe provided with a suction port in a refueling nozzle extended to a refueling hose, and a suction pump is connected to the other end of the suction pipe to remove oil vapor generated in a fuel tank of an automobile or the like. The method of suction and collection in the underground tank of the gas station was common.

[0003]

However, in the above method, the negative pressure is applied to the suction pipe, so that the suction pipe is easily crushed. Particularly, the suction pipe is crushed at the curved portion of the refueling hose, and the oil vapor is squeezed in this portion. It remained and became a factor to hinder the vapor recovery function.

In view of the above problems, it is an object of the present invention to provide a highly reliable oil supply device which prevents the recovery path of oil vapor from being crushed and does not hinder the vapor recovery function.

[0005]

According to the present invention, a hose having a proximal end communicating with a liquid feeding means, and a hose connected to the tip of the hose, inserted into an oil supply port of a tank, and supplied by the liquid feeding means. An oil supply nozzle for discharging an oil liquid, and an air supply pipe provided at one end with an air supply port at the tip side of the oil supply nozzle so as to supply air into the tank, and at the other end side extending along the hose. A passage and a recovery port is provided at one end of the refueling nozzle so as to recover the oil vapor in the tank at one end,
A recovery pipe having the other end extending along the hose, a recovery mechanism for recovering oil vapor through the recovery pipe, an air supply unit for supplying air to the air supply line, and the oil supply nozzle. And a sealing means for sealing between the oil supply port of the tank and the oil supply nozzle so that the oil vapor in the tank does not leak outside after the oil supply nozzle of the tank is inserted. It is configured to be inserted into the oil supply port and to discharge the oil liquid to the tank by the liquid supply means, and to drive the air supply means to supply air to the tank during liquid supply. ..

[0006]

[Function] The gap between the oil supply nozzle and the oil supply port is closed, air is sent into the tank by the air supply means through the air supply pipe line to increase the pressure in the tank, and the pressure causes the oil vapor in the tank to be supplied. It is collected together with the air sent from through the collection pipe.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an oil supply system 1 according to an embodiment of the present invention.

In FIG. 1, an oil supply device 1 is generally connected to an oil supply hose 3 whose base end is communicated with a pump 2 corresponding to the liquid feeding means and a tip of the oil supply hose 3, and is connected to a fuel tank 4 of an automobile or the like. An oil supply nozzle 5 which is inserted into the oil supply port 4a and discharges the oil liquid supplied from the pump 2, and an air supply port 5a is provided at one end of the fuel supply nozzle 5 so as to supply air into the fuel tank 4. And the other end side is an air supply pipe 6 corresponding to the air supply line extending along the fuel supply hose 3, and one end is connected to the tip end side of the fuel supply nozzle 5 so as to recover the oil vapor in the fuel tank 4. A recovery pipe 7 having a port 5b and the other end of which extends along the oil supply hose and corresponds to the recovery pipe, and an air compressor 8 corresponding to the air supply means for supplying air to the air supply pipe 6. It consists of and.

The refueling device 1 is installed at a refueling site of a refueling station, and a refueling hose 3 connected to a refueling nozzle 5 is drawn out from a side surface of the device body 9. The refueling nozzle 5 is usually hooked on a nozzle hook 10 provided on a side surface of the apparatus body 9. For example, when a car of a customer arrives at a fueling station, an operator detaches the refueling nozzle 5 from the nozzle hook 10 and the car The fuel tank 4 is inserted into the fuel filler port 4a for fueling.

The refueling hose 3 is connected to a refueling system in the apparatus body 9. Reference numeral 11 is a pipe of a refueling system, which communicates with an underground tank 12, and a flow meter 13 and a pump 2 are arranged in the middle thereof. The fuel supply hose 3 is connected to the pipe 11 via the flow meter 13 and the pump 2.

The air supply pipe 6 and the recovery pipe 7 are respectively flexible, one end of which is provided with an air supply port 5a and a recovery port 5b at the tip of the refueling nozzle 5, and along the refueling hose 3, for example, a refueling hose. It is held integrally with the outer circumference of the No. 3 unit. In the case of the present embodiment, the other end of the air supply pipe 6 passes through the apparatus main body 9 and is connected to an air compressor 8 which is independently provided outside. Further, the other end of the recovery pipe 7 is connected to the oil type detection sensor 17 in the apparatus main body 9 and is connected to a recovery mechanism described later via a recovery pipe 22.

FIG. 2 shows a side view of the oil supply nozzle 5, and the tip portion thereof partially shows a sectional view.

As shown in FIG. 2, the tank 4 is provided at the tip of the oil supply nozzle 5 so that the oil vapor in the tank 4 does not leak outside when the oil supply nozzle 5 is inserted into the oil supply port 4a of the tank 4.
A tube 20 is provided as the locking means for locking the oil supply nozzle 5 to the oil supply port 4a when the gap between the oil supply port 4a and the oil supply nozzle 5 is sealed.

The tube 20 is, for example, an oil resistant rubber product, and has a bellows-like structure as shown in the perspective view of FIG.
As shown in FIG. 3, an air supply pipe 20a, an exhaust valve 20b, and a pressure reducing plug 20c are provided behind the tube 20.

The other end of the air supply pipe 20a is connected to the air supply pipe 6 via an air supply valve 21. The air supply valve 21 is a switching valve, and can be switched to the A direction or the B direction in FIG. 2 by a switching operation of the switching lever 21s. By switching this air supply valve 21 in the A direction, the air compressor 8
The air sent from the air supply pipe 6 through the air supply pipe 6 is supplied to the tank 4 through the air supply port 5a. Further, by switching the air supply valve 21 in the B direction, the air sent through the air supply pipe 6 is supplied to the tube 20 through the air supply pipe 20a.

The exhaust valve 20b can be opened and closed by operating the switching lever 20s, and is normally closed. When the refueling is finished and the refueling nozzle 5 is removed from the refueling port 4a of the fuel tank 4, the air in the tube 20 is removed. Opened when pulling out.
Further, the pressure reducing plug 20c discharges the air in the tube 20 by being automatically opened when more pressure than necessary is sent to the tube 20 through the air supply pipe 21 and the pressure in the tube 20 rises too much, This is for preventing the tube 20 from being damaged.

Further, the air compressor 8 is started when the refueling nozzle 5 is removed from the nozzle hook 10, and starts air supply.
As shown in the cross section of the tube 20, the tank 4 and the oil supply port 4a in FIG. 4, the air compressor 8 is moved to the tube 20 by operating the air supply valve 21 with the oil supply nozzle 5 inserted in the oil supply port 4a.
The tube 20 is inflated by introducing air from the tube. Therefore, the tube 20 seals the gap between the fuel filler port 4 a and the fuel filler nozzle 5. Furthermore, in the state of FIG.
Since the inside and the outside of the tank 4 of the filler port 4a of the filler nozzle 5 are locked by the bulge of the tube 20, the filler nozzle is locked and the filler nozzle 5 is easily displaced or dropped from the filler port due to vibration during refueling. There is nothing to do.

Further, since the tube 20 is freely deformable according to the shape of the fuel filler port 4a, it can be applied regardless of the type of screw of the fuel filler port 4a, or the fuel filler port 4a has recently been tended due to the design tendency of passenger cars. Even when refueling a fuel tank having a small insertion allowance of the refueling nozzle 5, the refueling nozzle 5 can be reliably locked to the fuel refueling port 4a of the tank.

When the refueling nozzle 5 is inserted into the refueling port 4a, the air supply port 5a and the recovery port 5b are simultaneously inserted into the refueling port 4a. By switching the air supply valve 21 in this state, Air from the air compressor 8 is sent into the tank 4 which is closed by the tube 20 through the air supply port 5a.

This air is the oil vapor in the tank 4 and the tank 4
The air mixed inside and mixed with the oil vapor by the pressure increase in the tank 4 due to this air is recovered from the recovery port 5b. The recovered mixed air of oil vapor is supplied to the oil type detection sensor 17 through the recovery pipe 7 and further recovered by the recovery mechanism through the recovery pipe 22.

Reference numeral 14 denotes a control device, which will be described later, according to the setting of the function of whether or not to perform automatic oil type determination in which the oil vapor in the tank 4 supplied as described above is determined by the oil type detection sensor 17. The refueling operation is performed by various operations. The setting of the function of whether or not to perform the automatic oil type determination is set in advance by the function setting device 16a of the operation unit 16, and the function set by the function setting device 16a is displayed on the function display device 16b. There is.

First, the refueling nozzle 5 is inserted into the refueling port 4a and fixed as described above. When the function setting device 16a is set to perform the automatic oil type determination, when the refueling nozzle 5 is removed from the nozzle hook 10 and the nozzle switch 15 provided on the nozzle hook 10 is turned on, the automatic oil type judgment described above is performed. Then, when the detected oil type of the tank 4 and the oil type corresponding to the preset oil type of the underground tank 12 match, the control device 14 activates the pump motor 18 to drive the pump 2.

Alternatively, when the function of omitting the automatic oil type determination is set, when the nozzle switch 15 is turned on, the pump motor 18 is activated and the pump 2 is driven. By driving the pump 2, the oil liquid in the underground tank 12 is pumped up through the oil supply pipe 11, passes through the flow meter 13 and the oil supply hose 3, and is supplied to the tank 4 from the oil supply nozzle 5.

During refueling, the flow meter 13 measures the refueling amount, and the flow rate pulse transmitter 13a controls the flow rate pulse by the control device 1.
Output to 4. Then, the control device 14 integrates the flow rate pulses and displays the amount of oil supply on the oil supply indicator 19a of the display unit 19.

Reference numeral 19b is a status indicator for indicating the operating state of the refueling device 1, which is provided on the front surface of the main body 9 of the apparatus and blinks a lamp during automatic oil type determination. Is turned on to notify the different oil type.

Further, the air mixed with the oil vapor in the tank 4 supplied to the oil type detection sensor 17 as described above is recovered by the recovery mechanism via the recovery pipe 22. The recovery mechanism is composed of the underground tank 12, the exhaust pipe 23, the filter 24, the discharge pipe 25, and the decompression release valve 26. Recovery pipe 2
The air that has been collected from 2 and mixed with the oil vapor that has filled the underground tank 12 is guided to the filter 24 via the exhaust pipe 23, purified there, and further decompressed by the decompression release valve 26 via the discharge pipe 25 to the outside air. Is released.

The air compressor 8 is operated until refueling is completed, the refueling nozzle 5 is returned to the nozzle hook 10 and the nozzle switch 15 is turned off, while the oil vapor in the tank 4 is once stored in the underground tank 12 as described above. Is collected in the air, is further purified by the filter 24, and is then released to the outside air. Therefore, the oil vapor in the tank 4 does not leak to the outside as it is.

The recovery pipe 7 and the air supply pipe 6 for mixing and recovering the oil vapor in the tank 4 with the air sent from the air compressor 8 are always pressurized by the compressed air from the air compressor 8. In addition, because of the pressurized state, even if the refueling hose 3 is bent due to the curve, it does not block the flow path of the air mixed with the oil vapor. Therefore, the oil vapor in the tank 4 can be efficiently recovered.

Further, since the oil vapor is diluted by the compressed air from the air compressor 8 in the oil vapor recovery stage,
Even if air mixed with oil vapor leaks during recovery, the risk of ignition of oil vapor is reduced.

The present invention can also be applied to an ordinary oil supply device having no oil type detection sensor. In that case, when the nozzle switch 15 is turned on, the pump motor 18 is activated and the air compressor 8 is activated, and air is supplied to the tank 4 while refueling.

FIG. 5 shows an oil supply nozzle 3 according to the second embodiment of the present invention.
5 shows a side view and a partial cross section of a state in which the fuel tank 5 is locked to the fuel filler port 4a of the fuel tank 4.

The tip portion of the oil supply nozzle 35 is generally a rotor 36 and a rotor housing 3 as shown in the cross section of FIG.
7, a cover 39 fixed to the tip of the rotor housing 37, and a screw-in portion 38.

The rotor housing 37 has a substantially cylindrical shape as shown in the cross section of FIG. 7, and the rotor 36 is housed in the center thereof. Here, the inner wall surface 3 of the rotor housing 37
Since the inner diameter of 7 m is larger than the outer diameter of the rotor 36, a space is formed in the upper portion between the inner wall surface 37 m of the rotor housing 37 and the outer wall surface of the rotor 36.

The lower part of the rotor housing 37 is shown in FIG.
A switching path 37a, an air supply path 37d, and a recovery path 37e are provided so as to penetrate in the axial direction of the rotor 36, and ventilation paths 37b and 37c are provided with their tip sides shielded as shown in the cross section in FIG. Further, there is provided a communication passage 37f that communicates the ventilation passages 37a and 37b, a communication passage 37g that communicates the ventilation passages 37a and 37c, and a communication passage 37h that communicates the ventilation passages 37a and 37d. Further, an air supply passage 37k that connects the switching passage 37a and the air supply pipe 6 is provided. The recovery path 37e is connected to the recovery pipe 7.

A lever 40 is inserted and attached to the switching path 37a. The lever 40 comprises an operating handle 40a and a switching rod 40b as shown in the side view of FIG. The switching rod 40b has a substantially columnar shape, and the left and right ends in FIG. 7 of the middle portion excluding the base end portion and the tip end portion are cut off to form a cutout portion. Grooves are formed on the outer periphery of the base end and the tip end where the notch is not formed, and the O-rings 40c and 40d for sealing are attached, and the air supplied from the air supply passage 37k passes through the switching passage 37a. Street rotor housing 3
7 is prevented from leaking to the tip end side or the base end side.

In FIG. 7, the switching rod 40b is connected to the switching path 37a.
The state in which the switch bar 40b is rotated about 45 degrees counterclockwise from the state in which the cutouts are arranged on the left and right,
That is, in the state shown by the solid line, the air supply passage 37k and the communication passage 37
f, that is, the arrow a direction indicated by the solid line is communicated, and at the same time, the communication passage 37g and the air supply passage 37d are communicated,
That is, the arrow c direction indicated by the solid line is communicated.

On the contrary, in the state in which the cutouts are arranged on the left and right of the switching rod 40b in the state of being rotated about 45 degrees clockwise, that is, in the state shown by the broken line, the air supply passage 37k and the communication passage 37g.
Are communicated with each other, that is, the arrow b direction indicated by the broken line is communicated with
At the same time, the communication passage 37f and the communication passage 37h communicate with each other, that is, the arrow d direction indicated by the broken line communicates with each other.

Further, the inner wall surface 37m on the tip side of the rotor housing 37 is substantially a crescent moon when viewed from the tip side so as to cover the tip side of the space formed by the inner wall surface 37m of the rotor housing 37 and the outer wall surface of the rotor 36. A projecting portion 37t having a shape is provided, and shields the space and the air supply groove 38k formed on the base end surface of the screwed portion 38 described later so as not to communicate with each other.

The rotor 36 also has a substantially cylindrical shape, and four blades 36a to 36d are attached to the outer peripheral portion of the rotor 36 in a groove provided perpendicularly to the rotation axis of the rotor 36. This feather board 36
The springs (not shown) provided in the grooves in which a to 36d are mounted respectively receive a force that always presses the outer peripheral direction, that is, the inner wall surface 37m of the rotor housing 37. Here, the inner wall surface 3 of the rotor housing 37
The space formed between 7 m and the outer wall surface of the rotor 36 is divided into three spaces 37p to 37p by the blades 36a to 36d.
It is divided into 37r.

Also, eight projections 3 are provided on the tip surface of the rotor 36.
6e _{1 to} 36e ₈ are provided.

Further, a hose passage 36s is provided at the center of the rotor 36 so as to penetrate from the base end to the tip, and the oil supply hose 3 is inserted therein.

The threaded portion 38 shown in FIG. 9 is provided with a groove 38a on its outer peripheral surface. As shown in FIG.
By holding a plurality of steel balls 40 in a rollable state between a and a groove 39a provided on the inner wall surface of the cover 39,
The threaded portion 38 is rotatably supported by the rotor housing 37 via a cover 39.

Further, the collection groove 3 is formed on the entire circumference on the inner peripheral side base end surface.
8b is provided, and the recovery groove 38b communicates with the recovery path 37e of the rotor housing 37. Further, four communication grooves 38c to 38f are provided on the inner peripheral side, and the communication groove 38g and the recovery groove 38b provided on the entire inner peripheral side are communicated with each other. Further, recovery passages 38h _{1 to} 38h ₁₆ are provided at the bottom of the communication groove 38g so as to penetrate the tip end surfaces thereof.

Further, an air supply groove 38k is provided on the inner peripheral side of the entire circumference, and the air supply groove 38k communicates with an air supply passage 37d of the rotor housing 37. Further, the inner peripheral side thereof communicates with the air supply groove 38k, and the rotor 36 described above is connected.
Groove 38n ₁ ~38n ₈ of 8 into which they are fitted eight projections 36e ₁ ~36e ₈ is provided. or,
Air supply passages 38m _{1 to} 38m ₈ are provided at the bottoms of the grooves 38n _{1 to} 38n ₈ so as to penetrate the tip surfaces thereof.

Further, a threaded portion 38p corresponding to the locking means is provided so as to project in an annular shape on the tip end surface, and a screw 38q is formed on the outer peripheral surface thereof.

Further, a hose passage 38s is provided at the center of the screw-in portion 38 so as to penetrate from the base end to the tip, and the oil supply hose 3 is inserted therein.

Next, the operation of the fuel filler nozzle 35 having the above-described structure during fueling will be described.

First, the switching path 37 of the rotor housing 37.
The switching rod 40b attached to a is rotated in the counterclockwise direction by about 45 degrees, that is, in a state in which the a and c directions communicate with each other. In this state, the air guided from the air compressor 8 to the air supply passage 37k via the air supply pipe 6 is connected to the inner wall surface 37m of the rotor housing 37 and the rotor 37a via the communication passage 37f and the air passage 37b in the path a. It is introduced into the space 37p formed between the outer wall surface of 36.

Due to the air introduced into the space 37p, the blade 36a of the rotor 36 receives a pressing force in the clockwise direction of FIG. 7, and the rotor 36 is rotated in the clockwise direction, that is, the direction of arrow A shown by the solid line. Here, the space 37p into which air is introduced by the above rotation of the rotor 36 rotates in the A direction, moves to the right side in FIG. 7, and communicates with the ventilation path 37c.

The air introduced into the ventilation passage 37c here is
Further, the rotation of the rotor 36 narrows the space partitioned by the blades, so that the rotor 36 is compressed and is guided from the air passage 37c to the switching passage 37a via the communication passage 37g to the switching passage 37a. It is introduced into the air supply path 37d via the.

Further, the air introduced into the air supply passage 37d passes through the air supply passage 37d and is guided to the air supply groove 38k of the screwed portion 38. Further, this air flows from the air supply groove 38k to the groove 38n ₁
˜38n ₈ and air supply passages 38m _{1 to} 38m ₈ to the tip surface of the screw-in portion 38, passing through the inside of the screw portion 38p,
It is supplied into the fuel tank 4 through the fuel filler port 4a of the fuel tank 4.

In the rotor 36, the blades 36a to 36d are sequentially projected by the action of the spring built in the rotor 36 to form a new space, and the above-described rotation operation is repeated, whereby the rotor 36 is formed. It is rotated clockwise.

The rotation of the rotor 36 is transmitted to the screw-in portion 38 by the engagement of the projections 36e _{1 to} 36e ₈ formed on the tip end surface of the rotor 36 and the grooves 37n _{1 to} 37n ₈ of the screw-in portion 38. As the rotor 36 rotates, the screw-in portion 38 is rotated.

In this state, as shown in FIG.
By applying the screw portion 38p of the fuel tank 4 to the fuel filler port 4a of the fuel tank 4, the screw 3 formed in the screw portion 38p
8q is screwed into the screw 4b formed in the fuel filler port 4a, and the fuel filler nozzle 35 is screwed into the fuel filler port 4a of the fuel tank 4. Due to this screwing, the oil supply nozzle 35 is securely connected to the oil supply port 4a.
The oil supply port 4a is closed by the oil supply nozzle 35 so that the oil vapor in the fuel tank 4 does not leak outside.

After the threaded portion 38p of the threaded portion 38 is screwed into the oil supply port 4a and tightened, the threaded portion 38 cannot rotate any more. Therefore it is not possible to rotor 36 which is connected with the threaded portion 38 by the engagement between the groove 38n ₁ ~38n ₈ and projections 36e ₁ ~36e ₈ as described above is also rotated, thus blades of the rotor 36 of as described above Air cannot be conveyed by rotating the plates 36a to 36d. Therefore, after this, the rotor 36 and the rotor housing 3 are passed from the air compressor 8 via the air supply pipe 6 and the like.
The air introduced into the space 37p between the rotor 7 and
And guided to the air supply groove 38k of the threaded portion 38 through the gap of the contact portion between the protruding portion 37t of the rotor housing 37, further threaded portion 38p via the air supply passage 38m ₁ ~38m ₈
Air is supplied to the fuel tank 4 through the inside of the fuel tank and the fuel filler port 4a.

Further, the air supply passages 38m _{1 to} 3 of the screw-in portion 38
The pressure in the fuel tank 4 rises due to the air introduced from 8 m _8, and the air mixed with the oil vapor in the fuel tank 4 collects the recovery passages 38h ₁ to 3h of the screwed portion 38 of the fueling nozzle 35.
Recovery groove 38b from 8h ₁₆ through the communication grooves 38c to 38f.
To the recovery pipe 7 via the recovery path 37e of the rotor housing 37.

Further, the fuel tank 4 guided to the recovery pipe 7
The air mixed with the oil vapor in the inside is supplied to the oil type detection sensor 17 in the main body 9 of the oil supply apparatus as described above, and then collected in the underground tank 12 through the recovery pipe 22 and further purified by the filter 24. After that, the decompression release valve 26 is opened to the atmosphere.

When refueling is completed, the operation handle 40a of the lever 40 is operated to rotate the switching rod 40b in the clockwise direction by about 45 degrees, that is, b and d.
By switching the directions so that they communicate with each other, the air guided to the air supply passage 37k of the rotor housing 37 is introduced into the communication passage 37g through the route b and reaches the ventilation passage 37c. Further, the air is supplied to the inner wall surface 37m of the rotor housing 37 and the rotor 3
6 is guided to the space 37r between the outer wall surface and the outer wall surface of 6, and presses the vane 36b, and acts to rotate the rotor 36 counterclockwise, contrary to the case before the start of refueling. Therefore, the rotor 36 is rotated counterclockwise (direction B) by the action in the opposite direction to the above.

The rotation of the rotor 36 is transmitted to the screw-in portion 38 by the engagement of the protrusions 36e _{1 to} 36e ₈ at the tip of the rotor 36 and the grooves 38n _{1 to} 38n _{8 on} the base end surface of the screw-in portion 38, as described above. The screw portion 38p of 38 is rotated counterclockwise. Therefore, the screw 38q of the screw portion 38p and the screw 4b of the fuel filler port 4a of the fuel tank 4 are loosened and disengaged. That is, the refueling nozzle 35 is connected to the refueling port 4a.
Get out of.

The air introduced into the ventilation passage 37c of the rotor housing 37 together with the counterclockwise rotation of the rotor 36 flows out to the ventilation passage 37b on the left side of FIG. Further through the communicating passage 37f, via a path through the air passage 37d of d of switching換路37a reaches the front end surface of the threaded portion 38 in the same path as described above, is released from the gas feed path 38n ₁ ~38n ₈ It

Therefore, the threaded portion 38p of the threaded portion 38
When the fuel tank 4 is removed from the fuel filling port 4a of the fuel tank 4, air is always supplied into the fuel tank 4, the oil vapor in the fuel tank 4 is mixed with this air, and the recovery passage 38h ₁ of the screwed portion 38 of the fuel filling nozzle 35 By collecting from ~ 38h ₁₆ through the same route as described above, leakage of oil vapor in the fuel tank 4 to the outside air is prevented.

As described above, by applying the oil supply nozzle 35 of the second embodiment of the present invention, the compressed air supplied from the air compressor 8 is sent to the fuel tank 4, mixed with the oil vapor in the fuel tank 4, and recovered. In addition to being used for the purpose, the screw-in portion 38 at the tip of the fueling nozzle 35 is rotated, and the screw 38q of the screw-in portion 38 is screwed into the fuel filler port 4a of the fuel tank 4 by the rotation, or the screwing is released. By also utilizing it for the purpose of performing the operation, the refueling nozzle 35 reliably seals the refueling port 4a of the fuel tank 4 by a simple operation of operating the lever 40, and the refueling nozzle 35 is also operated.
Can be locked or removed.

In the above embodiment, the fueling nozzle is locked to the fueling port, but it is not always necessary to lock the fueling nozzle so that the oil vapor in the fuel tank is collected so as not to leak. Any configuration will do.

[0064]

As described above, in the oil supply device according to the present invention, the oil vapor in the fuel tank is diluted with the compressed air supplied from the air compressor, and the oil vapor is recovered as it is mixed with the compressed air. It is possible to safely and efficiently recover the oil vapor in the fuel tank, and by using the above compressed air, the fuel filler port of the fuel tank can be closed with the fuel filler nozzle by an easy operation. It has the feature that the oil vapor inside can be prevented from leaking to the outside.

[Brief description of drawings]

FIG. 1 is a block diagram of an oil supply device according to a first embodiment of the present invention.

FIG. 2 is a side view of the oil supply nozzle according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a tube.

FIG. 4 is a view showing a locked state of the oil supply nozzle by the tube.

FIG. 5 is a side view of the oil supply nozzle according to the second embodiment of the present invention.

6 is a cross-sectional view of the tip portion of FIG.

7 is a cross-sectional view of the rotor and the rotor housing taken along the line VII-VII of FIG.

8 is a cross-sectional view taken along the line VIII-VIII of FIG.

9 is a cross-sectional view of the threaded portion taken along the line IX-IX in FIG.

[Explanation of symbols]

 1 Refueling Device 2 Pump (Liquid Supply Means) 3 Refueling Hose (Hose) 4 Fuel Tank (Tank) 4a Refueling Port 5,35 Refueling Nozzle 5a Air Supplying Port 5b Recovery Port 6 Air Supply Pipe (Air Supply Pipeline) 7 Recovery Pipe ( Recovery line 8 Air compressor (air supply means) 9 Refueling device main body 12 Underground tank (recovery mechanism) 23 Exhaust pipe (recovery mechanism) 24 Filter (recovery mechanism) 25 Release pipe (recovery mechanism) 26 Decompression release valve (recovery) Mechanism) 20 tube (sealing means) 38p screw part (sealing means)

Claims (1)

Claim: What is claimed is: 1. A hose having a proximal end communicating with a liquid feeding means, and an oil liquid connected to the tip of the hose and inserted into an oil supply port of a tank to be supplied by the liquid feeding means. And an air supply port provided at one end with an air supply port at the tip side of the fuel supply nozzle so as to supply air into the tank, and the other end side having an air supply line extending along the hose. , A recovery port is provided at one end of the refueling nozzle so as to recover the oil vapor in the tank, and the other end is provided with a recovery conduit extending along the hose, and the recovery conduit. A recovery mechanism for recovering oil vapor, an air supply means for supplying air to the air supply conduit, and an oil vapor in the tank not to leak outside after the oil supply nozzle is inserted into the oil supply port of the tank. Sealing means for sealing between the fueling port of the tank and the fueling nozzle The oil supply nozzle is inserted into the oil supply port, and the liquid supply means discharges the oil liquid to the tank, and the air supply means is driven to supply air to the tank during liquid supply. An oil supply device characterized by being configured to perform.