JPH0617157B2 - Refueling nozzle - Google Patents

Description

TECHNICAL FIELD The present invention relates to an oil supply nozzle.

(Prior Art) A nozzle valve in which the valve is automatically closed when the amount of liquid in the tank reaches a full tank has already been proposed in Japanese Utility Model Publication No. 36-17872, and has been widely put into practical use. ing.

However, since this kind of nozzle valve has only the function of detecting the liquid surface and performing the closing operation,
For example, in order to automatically supply the amount of liquid designated by the customer, for example, Japanese Patent Laid-Open No. 56-11359.
As seen in No. 7, there is a problem that a preset liquid supply mechanism must be separately arranged in the liquid supply system from the liquid supply pump to the nozzle valve.

(Object) The present invention has been made in view of such circumstances, and an object of the present invention is to provide an oil supply nozzle capable of greatly simplifying an oil supply mechanism.

(Means for Achieving the Purpose) That is, according to the present invention, as an oil supply nozzle for achieving such an object, a negative pressure pipe communicating with a negative pressure pipe opening to the vicinity of the nozzle tip and a negative pressure generating portion in the pipe line Pressure-operated first and second automatic valve closing mechanisms are connected to these automatic valve closing mechanisms via levers, and when the first automatic valve closing mechanism is operated, the main valve is moved from the fully open position to the half open position. A trigger for opening and closing the main valve is provided for changing the main valve to the closed position when the second automatic valve closing mechanism is operated, and the nozzle tip portion of the negative pressure pipe and the opening portions of the negative pressure generating portion are provided. A first valve for temporarily closing the negative pressure pipe in response to a one-stage throttling signal and a liquid supply stop signal from the control device is provided between the two, and the negative pressure generating portion of the pipeline and the second valve. A part of the negative pressure pipe that connects with the diaphragm chamber of the automatic valve closing mechanism is A second valve for temporarily closing the negative pressure pipe is provided.

(Examples) Therefore, the details of the present invention will be described below based on illustrated examples.

1 and 2 show an embodiment of the present invention, in which a nozzle valve body 1 is always provided with a main valve 4 which is urged by a spring 3 to close a conduit 2. On the downstream side, two automatic valve closing mechanisms 5a and 5b, that is, a first automatic valve closing mechanism 5a which operates when the one-stage valve throttle signal s ₁ is output from the comparison means 41 (FIG. 4), and thereafter The second automatic valve closing mechanism 5b that operates according to the fully closed signal s ₂ that is output when the preset liquid supply amount is reached is provided.

These automatic valve closing mechanisms 5a and 5b are used for the negative pressure pipe 1 described later.
The diaphragm chambers 6a and 6b respectively connected to 3 and the diaphragms 6a and 6b which are stretched in the diaphragm chambers 6a and 6b, and which are operated to pull up the locking rods 8a and 8b which are deformed and held when the chamber becomes negative pressure 7a, 7b and a small ball 9a,
It is always locked to the locking rods 8a and 8b via 9b, and when the locking rods 8a and 8b are pulled up, the locking by them is released so that it can project downward against the springs 11a and 11b. A lever 12 which is constituted by sliding rods 10a and 10b, and which pivotally supports one end of a main valve opening / closing trigger 17 in the central portion is connected to the lower ends of the drive rods 10a and 10b with a pin. It is configured to move and operate the main valve 4 to the first-stage throttle position and the fully closed position by the movement of the moving rods 10a and 10b. Reference numeral 18 in the drawing denotes a latch portion that locks the other end of the trigger 17 to release the main valve 4.

By the way, one of the negative pressure pipes 13 connected to the above-mentioned two diaphragm chambers 6a and 6b is opened in the vicinity of the tip of the nozzle 14, and the other is opened in the negative pressure generating portion of the resistance valve 15 provided in the pipe line 2, The negative pressure generated in the negative pressure generating section is used to operate each of the automatic valve closing mechanisms 5a and 5b. Further, the conduit portion of the negative pressure tube 13 extending to the tip of the nozzle 14. 1 from the control circuit described later.
A first normally-open solenoid valve V ₁ for closing the pipeline in response to the stage valve throttle signal, the fully closed signal and the emergency signal is provided, and the pipeline communicating with the first automatic valve closing mechanism 5a includes: A second normally-closed solenoid valve V ₂ is provided which closes the pipe line so as to prevent negative pressure from acting on the diaphragm chamber 6b in response to the one-stage valve throttle signal.

FIG. 3 shows an example of an oil supply device using the above-described oil supply nozzle. Reference numeral 20 in the drawing indicates a display 21 for displaying a liquid supply amount and a preset amount, and a preset key 2.
2, a device main body equipped with an emergency stop button 23 and a nozzle hook 24 provided with a nozzle switch 25 on the outer surface, and here, a control device 26 for controlling the operation of the device, which will be described later,
A liquid delivery mechanism including a pump 28 connected to the motor 27 and a flow meter 30 having a flow pulse generator 29 is housed,
The liquid discharged from the flow meter 30 is supplied to the nozzle 1 via the hose 31, while the control signal from the control device 26 is supplied to the solenoid valves V ₁ and V ₂ of the nozzle 1 via the signal line 33 attached to the hose 31. It is configured to output.

FIG. 4 shows an embodiment of the above-mentioned control device, in which reference numeral 40 is a preset amount storing means, which is cleared by turning on the nozzle switch 25, and preset data from the preset key 22 is stored. The data is stored and output to the display 21 via the comparison means 41 and the display drive means 45 described later. Reference numeral 41 denotes the above-mentioned comparison means, which is a value obtained by subtracting a constant amount ΔL from the preset amount in response to the input of the liquid supply amount data from the counting device 44 for integrating the flow rate pulse and the preset data from the preset amount storage means 40. Is set to a reference level, and when the liquid supply amount matches the reference level, a one-stage valve throttle signal of time T sufficient to release the restraint of the sliding rod 10a is generated, and when the liquid supply amount matches the preset amount. It is configured to output a fully closed signal. Reference numeral 42 denotes a first valve driving means for driving the first solenoid valve V ₁ in response to a one-step throttle signal, a fully closed signal, and a signal from the emergency stop button 23, and 43 denotes a second valve. The driving means drives the second electromagnetic valve V ₂ by receiving the one-stage throttle signal. Incidentally, reference numeral 46 in the drawing indicates ON and OF of the nozzle switch 25.
The motor drive means for driving and stopping the pump drive motor by F is shown.

Next, the operation of the above embodiment will be described.

First, the preset key 22 is operated to input the refueling amount designated by the customer into the preset amount storage means 40. Next, the nozzle valve body 1 is removed from the nozzle hook 24, the tip of the nozzle 14 is inserted into the oil filling port of the tank of the automobile, and the trigger 17 is pulled to lock the other end to the latch portion 18.

As a result, the main valve 4 pushed up against the spring 3 releases the conduit 2 of the nozzle valve body 1, so that the liquid sent from the pump 28 into the conduit 2 pushes the resistance valve 15 open. However, at this stage, the amount of liquid in the tank has not reached the tip of the nozzle 14, and the atmosphere has flowed into the negative pressure pipe 13 from this portion. Negative pressure generated in any diaphragm chamber 6
It has no effect on a and 6b.

On the other hand, during this refueling, the signal output from the flow rate pulse transmitter 29 is input to the comparison means 41 via the counting means 44 and is compared with the preset value input to the preset amount storage means 40. Then, when the amount of refueling reaches, for example, about the remaining one of the preset values, that is, the reference level, the first and second solenoid valves V ₁ , V _{2 are} generated by the one-stage throttle signal s ₁ from the comparison means 41. Temporarily operates to close the conduit portion leading to the tip of the nozzle 14 of the negative pressure pipe 13 and the conduit portion communicating with the automatic valve closing mechanism 5b.

For this reason, the negative pressure inside the negative pressure pipe 13 where the inflow of the atmosphere is blocked by the first solenoid valve V ₁ becomes a negative pressure, and this negative pressure acts on the diaphragm 7a in the first diaphragm chamber 6a in the communicating state to operate the diaphragm 7a. It is deformed, and the locking tube 8a is pulled up to release the lock of the sliding rod 10a so that it can be projected downward.

As a result, the lever 12 pivotally supported at the ends of the respective sliding rods 10a, 10b pivots clockwise in the figure with the end of the second sliding rod 10b as the fulcrum, as shown by the solid line in FIG. The trigger 17 pivotally supported in the central part of the lower part moves downward by a half stroke, and the main valve 4 which responds to this moves to the one-stage valve throttle position to narrow the flow rate of the liquid flowing in the pipe 2 (FIG. 5).

When a preset amount of liquid is supplied to the tank in this narrowed state, the first normally open solenoid valve V ₁ of the negative pressure pipe 13 which communicates with the nozzle tip again by the fully closed signal s ₂ output from the comparison means 41. The pipe line is closed, the negative pressure in the negative pressure pipe 13 caused thereby is applied to the diaphragm 7b of the second diaphragm chamber 6b, and the locking rod 8b unlocks the sliding rod 10b to project it downward. As a result, the lever 12 at the lower end is rotated to the position shown by the chain double-dashed line in FIG. 2, and the pressing of the main valve 4 by the trigger 17 interlocked therewith is released to close the pipe line 2 ( (Fig. 5).

By the way, the operation of normal preset refueling has been described above, but when the tank is full in the process of this preset refueling, or the tank is filled up to full tank according to the customer's specification. In such a case, the opening at the tip of the nozzle 14 is submerged in the liquid to block the inflow of the atmosphere from there, and the negative pressure inside the negative pressure pipe 13 becomes a negative pressure. Therefore, the diaphragm 7 deformed by this negative pressure.
2 locked by the locking rods 8a, 8b via a, 7b
The two sliding rods 10a, 10b can project at the same time, and the pressure of the main valve 4 by the trigger 17 is released to instantly close the pipe line 2.

In addition, when a situation in which the liquid supply must be stopped occurs in the process of the liquid supply operation, the emergency stop button 23 is operated so that the first solenoid valve V ₁ causes the tip of the nozzle 14 to move. Since the line of the negative pressure pipe 13 leading to the tank is closed to bring it into the same state as when the inside of the tank is full, the liquid supply is instantaneously stopped through the same operation as described above.

In the above description, two solenoid valves V ₁ and V ₂ are provided in the negative pressure circuit leading to the negative pressure pipe leading to the tip of the nozzle 14 and the second automatic closing valve mechanism 5b, and thereby the main valve 4 is set to 1 Although the step valve throttling operation and the fully closing operation are performed, a third solenoid valve V ₃ is further provided in the negative pressure line communicating with the first automatic closing valve mechanism 5a, and the nozzle valve body 1 is provided with the above-mentioned structure. It is also possible to perform the above-mentioned operation. In this case, the operation of the normally open solenoid valves V ₁ , V ₂ , V ₃ will be omitted from the following table.

(Effect) As described above, according to the present invention, the refueling nozzle has the first,
A second automatic valve closing mechanism is provided, and a first valve that temporarily closes the negative pressure pipe by the one-stage throttle signal and the liquid supply stop signal is provided in the negative pressure pipe that opens near the tip of the nozzle. The negative pressure pipe communicating with the second automatic valve closing mechanism is provided with the second valve for temporarily closing the negative pressure pipe by the one-stage throttle signal, so that when the tank is full, Due to the negative pressure generated in the negative pressure pipe, the main valve is fully closed via both automatic valve closing mechanisms, and the oil supply is stopped in the same manner as the conventional oil supply nozzle.
It is necessary for preset liquid supply by activating only the automatic valve closing mechanism of (1) to half-open the main valve, and when the set amount is reached, operating the automatic volume closing mechanism to fully close the main valve. Since the flow rate throttling operation can be performed only on the refueling nozzle side, the mechanism on the refueling device side can be greatly simplified and its responsiveness can be improved.

[Brief description of drawings]

1 and 2 are cross-sectional views of an oil supply nozzle according to an embodiment of the present invention shown in various operating states, FIG. 3 is a view showing an example of an oil supply device, and FIG. 4 is a view showing a control circuit thereof. FIG. 5 is a diagram showing operation timing. 1 ... Nozzle valve body 4 ... Main valve 5a, 5b ... Automatic valve closing mechanism 6a, 6b ... Diaphragm chamber 12 ... Lever, 13 ... Negative pressure pipe 17 ... Trigger, 20 ... Lubrication device body 23 ...... emergency stop _{button, V 1,} V ₂ ...... normally open solenoid valve

Claims (1)

[Claims] 1. A negative pressure generating portion in the vicinity of the tip of the nozzle and in the pipeline is opened.
Operates by the negative pressure generated in the negative pressure pipe that communicates with the negative pressure pipe
The first and second automatic valve closing mechanisms and the automatic valve closing mechanisms
Connected via a lever to activate the first automatic valve closing mechanism
The main valve from the fully open position to the half open position.
When the dynamic valve closing mechanism is activated, the main valve is changed to the closed position.
A trigger for opening and closing the main valve is installed, and
Control between the nozzle tip and each opening of the negative pressure generator
Upon receiving the one-stage throttling signal and the liquid supply stop signal from the device, the negative pressure pipe
A first valve that temporarily closes the
The generator and the diaphragm chamber of the second automatic valve closing mechanism
The negative pressure signal is connected to a part of the negative pressure pipe to be connected by the one-stage throttle signal.
A second valve is provided to temporarily close the pressure tube.
And refueling nozzle.