JPS6231440Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refueling nozzle that performs refueling by controlling the flow rate from a discharge pipe as a plurality of air inlet holes are sequentially closed.

When the air inlet hole in the discharge pipe is blocked, the refueling nozzle uses the negative pressure generated in the negative pressure chamber to operate the valve mechanism in the fluid passage, automatically closing the fluid passage. It is becoming more and more occluded.

With conventional refueling nozzles, when refueling is done by inserting the discharge pipe into the refueling port of the car's fuel tank,
The air inlet hole of the discharge pipe may be blocked by bubbles generated in the fuel tank, and the fluid passage is automatically closed and refueling is stopped even if the fuel tank is not full. become. Therefore, conventionally, in order to fill the fuel tank,
The refueling worker had to operate the refueling nozzle again and continue refueling manually while checking that the fuel tank was full, which resulted in extremely poor work efficiency.

The present invention solves the above problems by providing a plurality of air inlet holes along the axial direction of the discharge pipe.
This system is characterized in that oil is supplied by controlling the flow rate from the discharge pipe as the air inlet holes are sequentially closed.

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

In FIGS. 1 and 2, a fluid passage 3 having a stepped portion 2 is provided in the valve body 1.
A first valve seat 4 is press-fitted and attached.
The valve mechanism for opening and closing the fluid passage 3 is composed of a main valve body 5 and an auxiliary valve body 6, and the main valve body 5 is seated on the first valve seat 4 so as to be removably seatable in order to open and close the fluid passage 3. . The main valve body 5 is provided with a passage 7 that communicates between the upper and lower sides of the first valve seat 4. The main valve body 5 is provided with a second valve seat 8, and the valve bodies 5 and 6 are connected to each other. Forced by a spring 9, the main valve body 5 is seated on the first valve seat 4, and the auxiliary valve body 6 is seated on the second valve seat 8, respectively, to close the fluid passage 3 and the passage 7, respectively.

Next, the automatic valve closing mechanism will be explained. Valve body 1
A sleeve 10 is fitted into the sleeve 10, and inside the sleeve 10 is a first shaft 12 that abuts the operating lever 11 and has first and second through holes 12a and 12b.
and a second shaft 13 that abuts the valve stem 6a of the auxiliary valve body 6 are slidably fitted. The second shaft 13 has a stepped portion 13a that comes into contact with the main valve body 5.
The second shaft 13 has first and second recesses 14 and 15 along its axial direction.
A first roller 16, 17 and a second roller 18, 19 are removably fitted into each recess 14, 15, respectively.

First and second negative pressure chambers 24 and 25 are formed between the lids 20 and 21 of the valve body 1 and the first and second diaphragms 22 and 23, respectively. The rollers 16, 17 and the rollers 18, 19 are supported between the elongated holes 28, 29 of the first and second receiving plates 26, 27, which are integrated with the diaphragms 22, 23, respectively, and are supported along the elongated holes 28, 29. It is slidable in the direction of movement of the shafts 12 and 13.
A spring 3 is provided in the first and second negative pressure chambers 24 and 25.
0 and 31 are inserted to move the diaphragms 22 and 23 toward the shafts 12 and 13, that is, the rollers 16 and
17 into the recess 14 through the first through hole 12a, and rollers 18 and 19 into the recess 15 through the second through hole 12b.
They are energized so that they can be inserted into each other. The shaft 12 is biased toward the operating lever 11 by a spring 32 interposed between the shafts 12 and 13.
A seal ring 33 maintains liquid tightness between the shaft 13 and the sleeve 10.

A third valve seat 35 is press-fitted and attached to the stepped portion 34 of the fluid passage 3, and a valve holding member 37 into which a discharge pipe 36 is fitted is in contact with an edge 35a of the valve seat 35. The protrusion 37a of the valve body 1
The discharge pipe 36, valve seat 35, and valve holding member 37 are fixed to the valve body 1 by tightening with a flange 38 screwed onto the valve body 1.

A valve stem 39a of an auxiliary valve body 39 that is seated on and off the valve seat 35 is slidably fitted into a cylindrical portion 37b at the center of the valve holding member 37, and the auxiliary valve body 39 is always held in the valve seat 35 by a spring 40. It is energized in the direction of seating. A negative pressure generating portion 42a is opened close to the contact portion 41 between the sub-valve body 39 and the valve seat 35 and communicating with a gap 42 defined from the fluid passage 3.
2a are first and second negative pressure chambers 24, 2, respectively;
It is connected to 5.

Valve body 1 from the protruding end 36a side of the discharge pipe 36
Two atmosphere introduction holes 44 and 45 are provided in the discharge pipe 36 toward the atmosphere, and the atmosphere introduction pipe 46 connected to the atmosphere introduction hole 44 is connected to the first negative pressure chamber 24 through the passage of the valve holding member 37. On the other hand, the atmosphere introduction pipe 47 connected to the atmosphere introduction hole 45 is connected to the valve holding member 37.
It communicates with the second negative pressure chamber 25 through a passage.

The operation of the refueling nozzle with the above configuration will be explained. When the operating lever 11 is pulled up, the shaft 12 is pulled up, and the shaft 13 is simultaneously pushed up via the rollers 16 and 17. At this time, the rollers 16 and 17 move along the long holes 28 of the receiving plate 26. As the shaft 13 is pushed up, the auxiliary valve body 6 is pushed up against the spring 9, opening the passage 7 and allowing fluid to flow into it. When the auxiliary valve body 6 opens, the auxiliary valve body 39 opens against the spring 40 due to fluid pressure, and the fluid is discharged from the discharge pipe 36. When the operating lever 11 is further pulled up, the shaft 13 pushes up the main valve body 5 and the fluid passage 3 opens (see FIG. 2). In this case, since the passage 7 is already open, the fluid pressure difference before and after the main valve body 5 becomes low, and the operating lever 11 can be easily pulled up.

When the auxiliary valve body 39 opens, an annular orifice is formed between the valve seat 35 and the auxiliary valve body 39, and negative pressure is generated in the negative pressure generating portion 42a due to the Ventury effect. However, since the atmosphere introduction holes 44 and 45 are open toward the atmosphere, the first and second negative pressure chambers 2
4 and 25 are at approximately atmospheric pressure through the atmosphere introduction pipe 46, and since the diaphragm 22 is not displaced, the rollers 16 and 17 remain inserted into the recess 14 of the shaft 13. Here, roller 1
Since rollers 8 and 19 are free in recess 15, rollers 18 and 19 are not in a position to connect shafts 12 and 13.

If the air introduction hole 44 is blocked by bubbles or the like while refueling continues, the first negative pressure chamber 24 becomes negative pressure, and the diaphragm 22 is moved in the direction away from the shaft 13 against the spring 30. It will be done. When the diaphragm 22 is moved, the receiving plate 26
follows this, and rollers 16 and 17 move to shaft 1.
3, and only the shaft 13 is pulled down against the spring 32 by the spring force of the spring 9 and fluid pressure applied to the valve bodies 5 and 6. As a result, the main valve body 5 is seated on the valve seat 4, but the roller 1
8 and 19 connect the shafts 12 and 13, and as a result, the auxiliary valve body 6 connects to the shaft 1.
3, the auxiliary valve body 6 is kept in an open state. The auxiliary body 6 is open so that fluid is flowing through the passage 7. At this time, since the passage 7 has a smaller diameter than the fluid passage 3, the flow rate decreases (see FIG. 3).

Furthermore, as refueling continues, the atmosphere introduction hole 45 is blocked with fluid, the second negative pressure chamber 25 becomes negative pressure, and the diaphragm 23 moves in a direction away from the shaft 13 against the spring 31. I am made to do so. When the diaphragm 23 is moved, the receiving plate 27 follows and the rollers 18 and 19 come out of the recess 15 of the shaft 13.
is further pulled up, and the auxiliary valve body 6
is seated on the valve seat 8, and the flow of fluid stops completely (see Figure 4). Refueling ends in this state.

As described above, the present invention is designed to supply oil by controlling the flow rate from the discharge pipe as the multiple air introduction holes provided in the discharge pipe are sequentially blocked, so that the valve mechanism is immediately activated due to foam etc. The fuel supply does not stop when the fuel is activated, and the flow rate gradually decreases until the fuel is supplied, so that the fuel can be automatically filled to a full state without interruption.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a refueling nozzle according to the present invention. FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, showing a state in which the valve body is open. FIGS. 3 and 4 are sectional views for explaining the operating state. DESCRIPTION OF SYMBOLS 1...Valve body, 3...Fluid passage, 5...Main valve body, 6...Auxiliary valve body, 11...Operation lever, 12
...First shaft, 12a...First through hole, 12
b...Second through hole, 13...Second shaft, 13
a... Stepped portion, 16, 17... First roller, 18,
19...Second roller, 24, 25...First and second negative pressure chambers, 26...First receiving plate, 27...Second receiving plate, 42a, 43a...Negative pressure generating section, 4
4, 45... Atmospheric introduction hole, 46, 47... Negative pressure pipe.

Claims (1)

[Claims for Utility Model Registration] A valve body, a discharge pipe provided on the downstream side of the valve body, a main valve body provided in a fluid passage within the valve body, and a discharge pipe provided on the downstream side of the valve body; a passage that communicates between the upstream side and the downstream side of the main valve body; an auxiliary valve element that closes the fluid passage together with the main valve element when the main valve element is seated; a second shaft that is connected to the auxiliary valve element and has a step that can come into contact with the main valve element; a first shaft into which two shafts are slidably inserted and slid by operation of an operating lever; an auxiliary valve element that is located downstream of the auxiliary valve element and opens when the main valve element is fully opened; a negative pressure generating section communicating with the gap between the sub-valve body and the valve seat; first and second negative pressure chambers communicating with the negative pressure generating section; and the first negative pressure formed in the discharge pipe. a first atmosphere introduction hole that is open to the outside air and communicates with the chamber; and an outside air opening that is formed in the discharge pipe and that is located upstream of the first atmosphere introduction hole and that communicates with the second negative pressure chamber. the second atmospheric air inlet hole, which is elastically biased in the direction of the first shaft, and the negative pressures introduced into the first and second negative pressure chambers resist the elastic biasing force, and first and second diaphragms that are displaced in a direction away from the first shaft; first and second rollers held in respective long holes of first and second receiving plates attached to the diaphragms; first and second recesses formed in the shaft and capable of receiving the roller; and first and second through holes formed in the first shaft and provided on each of the receiving plates, into which the roller can be inserted. At least the second recess has the first roller located within the first recess without displacement of the first and second diaphragms, and the first and second shafts When the main valve body and the auxiliary valve body are in an open state while being connected to each other, the second roller does not come into contact with the upper end surface of the second recess, and the first diaphragm is further displaced. However, when the first roller is removed from the first recess, the upper end surface of the second recess is brought into contact with the second roller so that only the auxiliary valve body is in the open state. A refueling nozzle characterized by having a holding length.