KR920004979B1 - Fueling-nozzle - Google Patents

Abstract

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Description

Supply nozzle

1 and 2 are side and top views showing, in cross section, a liquid supply nozzle which is an embodiment of the present invention.

3 is a perspective view of a spacer forming a main portion.

4 to 8 are explanatory views showing the liquid supply operation.

5 is a cross-sectional view of the main portion showing another embodiment of the present invention.

6 is a top view showing an example of a conventional liquid supply nozzle.

* Explanation of symbols for main parts of the drawings

1: Liquid feed nozzle 6: Check valve

9: liquid chamber 12: main valve

13: between valves 15,45: orifice

17: valve seat 20: automatic closing valve mechanism

30, 40: spacer 34, 44: protrusion

[Industrial use]

The present invention relates to a liquid supply nozzle for use in automatically performing a full supply liquid of the present invention, a so-called full tank liquid feed liquid.

[Private Technology]

Automatic nozzles used in gasoline stands are generally configured to stop the liquid supply by automatically operating the closed valve mechanism when the air flow path hole is opened at the end of the nozzle by the liquid in the tank. Since the flow path is blocked by bubbles generated on the upper surface of the liquid, the tank must be set again each time by operating the lever.

The liquid feeding device disclosed in Japanese Unexamined Patent Publication No. 63-125196 has been submitted by the present applicant in order to solve such a problem, and the liquid feeding nozzle used in the liquid feeding device is supplied as shown in FIG. With the start of the pump, the first operation of moving the valve seat A to the downstream side by the hydraulic pressure on the upstream side while bringing the main valve B into contact with the push rod, Between the valve C of the main valve B and the push rod D by the second operation of opening the flow path by removing the main valve B from the valve seat A via D) and the operation accompanying liquid level detection. 3) operation of closing the flow path by bringing the main valve (B) freed by the latch to the valve seat (A), and upstream by the hydraulic pressure drop caused by the hydraulic pressure drop caused by the suspension of the liquid supply. Valve seat (A) moved to the side Operation of FIG. 4 which latches the valve | bulb C of the main valve B to the push rod D by this, and operation | movement which makes a valve seat move to a downstream side again and opens by the rise of the hydraulic pressure of an upstream side by resuming liquid supply. By repeating the circulation operation returned to the third operation, the auxiliary water supply is performed to make the inside of the tank into the tank.

However, in such a structure, the valve seat A which added the force to the spring G by the temporary stop of liquid feeding moves to an upstream side, and the valve rod C of the main valve B is pushed ( In the process of latching to D), a negative pressure is applied to the liquid chamber F formed between the check valve E and the main valve B, so that the clasp operation is progressed smoothly.

Therefore, the applicant has proposed to drill a hole to the check valve (E) as Japanese Patent Application No. 62-284864. Although this improper resolution has been eliminated by this proposal, there is a first method for starting the liquid supply, that is, removing the liquid supply nozzle from the nozzle holder and starting the liquid supply pump to move the seat valve A to the downstream side by the hydraulic pressure on the upstream side. During operation, the liquid in the liquid chamber F was discharged from the liquid supply nozzle and scattered around, which was dangerous.

[purpose]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a further improved liquid feeding nozzle which is capable of performing a clasp operation as quickly as possible and in which no liquid is discharged before the liquid supply is started. .

[Means for achieving the purpose]

In other words, the present invention provides a liquid feed nozzle for solving such a problem, and includes a check valve on the outflow side of the main valve and an orifice check valve on the main body of the liquid feed nozzle in which the valve seat of the main valve is perturbed. By providing a means for holding and positioning a small gap with respect to the valve, it is possible to prevent the internal pressure of the liquid chamber formed between the main valve and the check valve during the movement of the valve sheet accompanying the liquid supply resumption. The quick latch operation is realized, and the liquid in the liquid chamber between the check valve and the main valve is quickly discharged so that the liquid is not discharged before opening the main valve of the next liquid supply nozzle. It will be described in detail according to one embodiment.

1 and 2 show an embodiment of the present invention, an air flow passage 4 having one end pierced in a leading end portion of the liquid feed nozzle 1 at its tip portion. ) Is inserted into the negative pressure generating portion 7 of the check valve 6 provided in the passage portion 3 and the negative pressure chamber 21 of the automatic closing valve mechanism 20. It is open.

" 자상의 틀체(狀)(24)가 고정설치되어 있어서, 이 틀체(24)의 장공(長孔)내에서 섭동(攝動)하는 2본의 핀(25)을 밸브간(13)의 "

" 부에 설치한 노치(notch)(14)내에 위치하게 하고, 밸브간(13)내에 삽통한 푸쉬로드(26)의 "凹"부(27)에 걸거나 벗기게 하므로서, 밸브간(13)과 푸쉬로드(26)를 붙었다 떨어지도록 (接難)구성되어져 있다.On the other hand, the end portion of the hose 10 communicating with the feed pump (not shown) in the metering device is coupled to the passage portion 3, and the valve portion 13 is interposed through a flow path from here to the passage portion 2. The main valve 12 which added the force so that the flow path may always be occluded by the spring 11 is arrange | positioned, Moreover, as shown in FIG. Similarly, an automatic closing valve mechanism 20 is provided in which the diaphragm 22 is deformed by the negative pressure generated in the negative pressure chamber 21 to lock the main valve 12. As is well known, the automatic shutoff valve mechanism 20 has a main valve when an opening end 5 located at the tip of the passage part 2 of the air flow path pipe 4 is blocked by liquid or foam in the tank. The diaphragm 22 which adds a force to the outside by the said spring 23 is installed in the negative pressure chamber 21 which communicates with the air flow channel 4 by operating to close the 12. Diaphragm (22) has the same features as those found in JP 51-27885.

"The magnetic frame 24 is fixed, and the two pins 25 which perturb in the long hole of this frame 24 are connected with the valve 13".

Between the valves 13 by placing them in the notches 14 provided in the " parts " and engaging or removing the " 凹 " portions 27 of the push rods 26 inserted into the valve sections 13; And push rod (26) is attached and detached.

The push rod 26 has a spring 28 acting on its rear end abuts against its back so that the always lever 29 is forced forward, so that one end is rotated by a pin. The push rod 26 is resisted against the spring 28 and moved to the right side in the drawing by pulling the lever 29 supported to the rear, and the main valve ( It is comprised so that a flow path may open by moving 12) to the right.

On the other hand, in the above-mentioned passage part 3, the valve seat 17 which abuts the main valve 12 and closes a flow path is provided on the upstream side of the check valve 6 so that perturbation is possible. In addition to the general valve seat mechanism described above, the valve seat 17 is peeled off from the push rod 26 by liquid level detection, and the main valve 12 is brought into contact with the main valve 12 due to the decrease in the hydraulic pressure caused by the subsequent liquid stop. Is moved forward to the right in the drawing and has a mechanism for engaging the valve rod 13 again with the push rod 26 via the pin 25. On the back of the valve seat 17, a spring 11 is provided. The biasing force of the compression spring 16 is sufficient to move the main valve 12 to the right side in the drawing against the biasing force.

Here, reference numeral 18 in the figure denotes a stopper provided at the limit point of the right side movement of the valve seat 17.

In addition, reference numeral 30 in the drawing denotes a spacer which forms a characteristic part of the present invention provided for communicating between the liquid chamber 9 formed between the check valve 6 and the main valve 12 and the communication line 2. As shown in FIG. 3, the hat 30 is formed in a hat shape in which a fluid hole 32 is provided in the top surface 31, and the flange portion 33 is connected to a valve seat compression spring. Seated on the axe seat (8) of (16) so that the valve seat compression spring (16) can be received by the upper surface thereof, and inside the top of the check valve (6); The protrusion 34 is formed to be in contact with the check valve 6 and the orifice 15 so as to form a small gap δ between the liquid chamber 9 and the communication line 2 between the check valve 6 and the orifice 15. It is comprised as this.

Next, the liquid supply operation by the above-described apparatus will be described with reference to FIG. 4. As shown in FIG. 4B, under the state where the liquid supply pump is stopped and the lever 29 is not operated, the communication section 3 will be described. The valve seat 17 assembled perturbation in the inside is moved to the right side in the figure to the position which abuts against the stopper 18 by the force of the compression spring 16 acting on the back side thereof. For this reason, the main valve 12 which adds a force by the spring 11, and contacts the valve seat 17 is also pushed back to the right side in the figure, and the pin 25 is the notch 14 of the valve | bulb 13 between valves. ) And the push rod 26 of the push rod 26 engage the valve section 13 and the push rod 26.

Under this condition, for example, when the liquid feed nozzle 1 is started from a nozzle latch not shown to fill gasoline into a fuel tank of an automobile, the valve seat 17 receives the hydraulic pressure from the liquid feed pump and receives the main valve ( 12), it moves to the picture side in the drawing as it abuts (Fig. 4II)).

Therefore, when the passage portion 2 is inserted into the feed port of the tank and the lever 29 is pulled, the push rod 26 moves the valve section 13, which is integrally coupled, via the pin 25 to the right in the drawing. Pull back to open the main valve 12 (FIG. 4), and deliver the liquid from the liquid feed pump to the passage section 2 between the retracted check valve 6 and the orifice 8 and into the tank. .

When the liquid supply is started in this manner, the negative pressure generating portion 7 of the check valve 6 generates a negative pressure due to the Benley effect, so that the inside of the air flow channel 4 opened therein becomes negative pressure. On the other hand, since the open end of the air flow path tube 4 in the air flow path part 2 is in the air, air is sucked in, so that the inside of the open end 5 is at atmospheric pressure at this point.

When the liquid level in the tank rises due to the subsequent liquid supply, and soon after the opening end of the passage part 2 is blocked by the liquid bubbles, negative pressure is generated in the negative pressure chamber 21 communicating with the air flow channel 4. The negative pressure acts on the negative portion 7 to become negative pressure, and the negative pressure attracts the diaphragm 22 against the spring 23 to the upper side in the drawing, and pulls up the frame 24 integrally with the pin ( 25) is removed from the concave portion 27 of the push rod 26.

As a result, the valve section 13 in which the pin 25 is released by the pin 25 is moved to the left side in the drawing due to the force of the spring 11 acting on the magnet while accommodating the pin 25. It moves, and the liquid supply stops by making the main valve 12 contact the valve seat 17 (FIG. 4).

In such a state, the pump motor is stopped by an output signal from a liquid supply control circuit (not shown), and with this, the valve seat 17 from which the hydraulic pressure is released is released by the biasing force of the compression spring 16. It moves to the right side in drawing, pressing 12), and engages the valve part 13 and the push rod 26 again through the pin 25 at the end.

Thus, with the movement of the valve seat 17 to the right side, the liquid chamber 9 formed between the main valve 12 and the check valve 6 expands to generate negative pressure therein, but as described above, the valve seat The spacer 30 seated on the acceptor seat 8 of the compression spring 16 is pressed by the projection 34 to the top of the check valve 6 so that the check valve 6 and Since a small gap δ is formed between the orifice 15, air flows into the liquid chamber 9 from the passage portion 2 through the gap δ, thereby allowing the liquid chamber ( 9) the excessive pressure drop does not occur in the pressure spring 16 is smoothly transmitted to the valve seat 17, thereby smoothly transmitted to the valve seat 17, according to the valve seat ( 17 smoothly engages the valve rod 13 and the push rod (26) via the pin (25) To the right until the position (Fig. 4).

Then, when a predetermined time elapses from this state, that is, a time of 2-3 seconds until the foam in the tank is turned off, the liquid supply control means starts the pump motor again. As a result, the liquid flowing into the passage part 3 moves the valve seat 17 to the left side in the drawing against the compression spring 16 so that the main valve 12 and the valve seat 17 are separated from each other to enter the liquid supply operation again. (Figure 4).

After the liquid supply resumption operation, the opening end of the air flow path 2 side of the air flow channel 4 is closed again by a bubble, and the automatic shutoff valve mechanism 20 operated in conjunction with this closes the main valve 12 to supply liquid. When it stops, after that, it repeats the above operation | movement and performs intermittent liquid supply, and if this repeats 3 or 4 times, the liquid supply control means sees that a tank is full tank, and stops a pump motor and completes all liquid supply operations.

Then, the liquid in the liquid chamber 9 between the check valve 6 and the main valve 12 flows out quickly through the gap δ until the liquid supply nozzle is removed from the fuel tank of the vehicle. Even if the valve seat 17 moves, the liquid cannot be discharged.

5 shows another embodiment of the present invention, in which a hat-shaped spacer 40 having a fluid hole 42 in the top surface 41 is integrally formed with the orifice 45, which is a passage part. Since the spacer 40 and the orifice 45 can be integrally molded according to this embodiment, the orifice formed by the projection 44 The gap δ between the 45 and the check valve 6 can be adjusted accurately.

Furthermore, in this embodiment, the orifice 45 and the spacer 40 may be configured by different members, and both may be configured to be integrated thereon by appropriate means.

[effect]

As described above, according to the present invention, there is a slight gap between the check valve and the orifice in the main body of the liquid supply nozzle, in which a check valve is provided on the outflow side of the main valve to perturb the valve seat of the main valve. Since a means for locating the fuel tank is provided, it is possible to automate all operations in the tank as a man tank, which not only can significantly reduce the number of people required for the liquid supply, but also the main valve during the movement of the valve sheet accompanying the liquid supply resumption. Rapid latch operation can be realized by not changing the internal pressure of the liquid chamber formed between the check valve and the check valve. The liquid in the liquid chamber cannot be discharged.

Claims (1)

A check valve is provided on the outflow side of the main valve, and a means for locating the check valve with a slight gap with respect to the orifice is provided in the main body of the liquid supply nozzle which has made the valve seat of the main valve perturbable. Feed nozzle.

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