JPH01294495A - Fluid feeder - Google Patents

Abstract

PURPOSE:To fill a tank with fluid by only one feeding operation, by repeatedly making a halt of fluid feeding for a certain internal at a fluid feeding nozzle which is provided with the first valve displacing a position to pass the fluid by the fluid pressure and the second valve to close its path by a liquid level indicator. CONSTITUTION:When a lever 30 is pulled to hook a latch 31, a valve stem 12 raises a pilot valve 14 and a main valve 16 opens a passage opening 18 equipped at a movable valve sheet 19. When the liquid level in the tank rises and the opening end of the nozzle 2 is closed due to foam on the liquid level, the inside of a vacuum chamber 21 connected to an air passage tube 5 becomes negative and a diaphragm 23 lifts up a stopping bar 22 to relieve a hold of a sliding bar 26. The main valve 16 contacts the movable valve sheet 19 to close the passage opening 18. Form disappears and a pump motor is started by a signal from a timer. Again the opening end of the nozzle 2 of the air passage tube 5 is closed by foam and an automatic valve closing mechanism 20 lowers the valve stem 12 via the lever 30 and the main valve 16 contacts the movable valve sheet 19 to make a halt of fluid feeding. Thereafter, this motion is repeated to feed the fluid and the pump motor is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid supply device that can automatically perform full liquid supply, so-called "full liquid supply J."

(Prior art) As seen in Japanese Patent Publication No. 51-27885, auto nozzles used at gas stations, etc. close when the air flow pipe opening at the tip of the nozzle is blocked by liquid in the tank. The mechanism is configured to automatically operate to stop the liquid supply.

However, in reality, it occurs on the top of the liquid and blocks the air flow pipe, stopping the liquid supply, so in order to fill the tank, you have to operate the lever several times to close the valve. This method has the disadvantage that the mechanism must be reset each time.

(Problems to be Solved by the Invention) The present invention was made in view of the above disadvantages, and its purpose is to provide a new liquid supply system that can fill up the tank with one-time liquid supply operation. The goal is to provide equipment.

(Means for Solving the Problems) That is, the present invention provides a liquid supply device for achieving the above-mentioned problems, which includes a first valve that is displaced to a liquid-permeable position by liquid pressure in a pipe, and a liquid level detection device. A liquid supply nozzle is provided with a second valve that closes the passage of the first valve in a position where liquid can pass through an actuated valve closing means, and the liquid supply is stopped for a certain period of time each time the liquid supply of the liquid supply nozzle is stopped. It is constructed by repeating liquid feeding means.

(Example) Therefore, a description will be given below based on the illustrated embodiment.

The drawing shows one embodiment of the present invention, and the liquid supply nozzle main body 1 is roughly divided into a cylinder tip part 2, a cylinder body part 3, and a grip part 4, as shown in Fig. 1.2. An air passage pipe 5 which is open at one end or near the tip of the cylinder head part 2 is inserted into the cylinder head part 2, and the other end is connected to the negative pressure generating part 7 of the check valve 6 provided in the cylinder body part 3. , opens into the negative pressure chamber 21 of the automatic valve closing mechanism 20.

On the other hand, the end of the hose 10 that communicates with the liquid supply pump 42 (FIG. 4) in the metering device 40 is connected to the rear end of the cylinder body 3, and the flow path from here to the cylinder tip 2 includes: A valve mechanism 11 is provided to open and close the flow path. This valve mechanism 11 is attached to a pilot valve 14 which is attached to the tip of a valve rod 12 and is biased downward by a weak spring 13 so as to always come into contact with the main valve 16, and which is loosely inserted into the tip of the valve rod 12. Main valve 16 with a through hole 15 that is closed by the pilot valve 14
, the flow path opening 18 in the center comes into contact with the back surface of the main valve 16.
A movable valve seat 19 is always urged upward by a strong spring 7 to close the valve.

2o is an automatic valve closing mechanism that deforms the guyaflame 23 by the negative pressure generated in the negative pressure chamber 21 and closes the main valve]6;
As is well known, this automatic valve closing mechanism 20 operates to close the main valve 16 when the open end located at the tip of the cylinder tip 2 of the air flow pipe 5 is blocked by liquid in the tank. It operates to pull up a negative pressure chamber 21 that communicates with the air flow pipe 5 and a locking rod 22 that is stretched inside this negative pressure chamber 21 and is deformed and held when the inside of the chamber 21 becomes negative pressure. Guyafram 2
3, and a sliding rod which is always locked to the locking rod 22 via a small ball 24, and which is released from the lock when the locking rod 22 is pulled up and projects downward against the spring 25. 26, and roughly at the lower end of this sliding rod 26 is a valve rod 12.
The valve mechanism 11 is opened and closed by moving the lever 30 up and down.

Note that the reference numeral 31 in the figure indicates a latch for holding the lever 30 in the pulled position.

On the other hand, FIG. 3 shows a measuring device with components not directly related to the present invention removed, such as a keyboard for presetting the amount of liquid to be supplied and operation buttons for automatic liquid supply operation.
A liquid supply pump 42 driven by a pump motor 43 is configured to feed liquid stored in an underground tank or the like to the nozzle body 1 via a flow meter 41. The flow rate pulse transmitter 44 connected to the flow rate pulse generator 44 is configured to output a pulse signal to a control device M5o, which will be described later, and display it on a display 46.

FIG. 4 shows details of the above-mentioned control drawing 5o.
The liquid supply control device 50 includes a liquid supply stop detection means 51 that outputs a signal to a timer 52 and a motor control means 53 when the pulse signal from the flow rate pulse transmitter 44 is cut off; The clock means 52 outputs a signal to the control means 53 to operate the pump motor 43 after a preset time has elapsed, and the nozzle switch 45 operates the pump motor 43 and controls the supply. The pump motor 43 is stopped by a signal input from the liquid stop detection means 51, and furthermore, the timing means 5
The motor control means 53 is configured to receive, for example, 3 or 4 signals from 2, for example, 3 or 4 times, and it is assumed that the liquid supply has ended, and no further signals will be accepted.The motor control means 53 is reset by signals from the nozzle switch 45, and the flow rate pulse is A counting means 54 integrates the flow rate pulses from the transmitter 44 and outputs the integrated value to the display 46 via the display driving means 55.

Next, the liquid supply operation by the above-mentioned apparatus will be explained based on FIG. 2.

When the liquid supply nozzle main body 1 is hung on the nozzle hook 49 of the metering device 140, that is, when the liquid supply pump 42 is stopped and the lever 30 is not operated,
As shown in FIG. 2(i), the movable valve seat 19 is biased by the strong spring 17 and comes into contact with the back surface of the main valve 16 to close its own flow path opening 18, and at the same time closes the main valve]6. The upper edge of the push-up is brought into contact with the pilot valve 14, and the pilot valve 14 is pushed up against the weak spring 13.

In this state, for example, when the nozzle body 1 is removed from the nozzle hook 49 in order to fill the fuel tank of a car with gasoline, a signal from the nozzle switch 45 causes the control device 5 to
The zero counting means 54 is reset to make the display 46 zero, and at the same time, the pump/motor 43 drives the liquid supply pump 42 and enters a liquid supply operation. Therefore, the movable valve seat 19 and the main valve 16, which had been raised due to the force of the spring 17, fall under the hydraulic pressure from the liquid supply pump 42 while remaining in contact with each other, and along with this, the weak spring The pilot valve 14 energized by the valve 13 also moves downward, and the flow passage opening 18 of the movable valve seat 19
remains in the occluded state (Fig. 2 (ii)).

Next, insert the tube tip 2 into the liquid supply port of the tank, pull the lever 30, and hook the latch 31, and the lever 3o
The valve rod 12 pushed up first pushes up the pilot valve 14 against the weak spring 13, and forms a gap between it and the main valve 6, which is pushed down by the hydraulic pressure, and from there, the pilot valve 14 is pushed up against the weak spring 13. Hole 15
The liquid flows to the downstream side via , lowering the hydraulic pressure, and then pushing up the main valve 16 to open the flow path gap 018 provided in the movable valve seat 19 (
Figure 2 (iii)). Therefore, the liquid sent by the liquid supply pump 42 flows from the negative pressure generating section 7 of the check valve 6 to the cylinder tip section 2, and further flows from there into a tank (not shown). On the other hand, when liquid supply is started in this way, negative pressure is generated in the negative pressure generating part 7 of the check valve 6 due to the Venturi effect, and the inside of the air flow path pipe 5 opened here is made negative pressure. , since the mouth end of the pipe 5 on the cylinder tip 2 side is in the atmosphere and sucks air, the negative pressure chamber 2 of the automatic valve closing mechanism 20
1 is at atmospheric pressure at this point.

As the liquid level in the tank rises due to subsequent liquid supply, and eventually the open end of the cylinder tip 2 is blocked by the bubbles on the liquid level, the inside of the negative pressure chamber 2 communicating with the air flow pipe 5 becomes a negative pressure due to the negative pressure action in the negative pressure generating part 7, and the diaphragm 23, which is deformed by this negative pressure,
2 was pulled up and the sliding rod 26 was locked through the small ball 24.
Release the lock. As a result, the lever 30, whose free end is locked in the notch 31, loses its fulcrum by the sliding rod 26, so it falls down due to the biasing force of the spring 13 acting on the pilot valve 14, lowering the main valve 16 together with its back surface. The flow path opening] 8 is closed by contacting the movable valve seat 19 (FIG. 2 (1V)).

In this state, the liquid supply stop detection means 51 immediately detects this liquid supply stop, and based on the signal, the timer 52
At the same time, a signal is sent to the motor control means 53 to cause the control means 53 to stop the pump motor 43. Therefore, the movable valve seat 19 whose hydraulic pressure has been released rises together with the main valve 16, the pilot valve 14, and the valve rod 12 integrated therewith due to the urging force of the strong spring 17, and on the other hand, the lever 3
The sliding rod 26, which is released from the downward force exerted by the valve rod 2 through the valve rod 07a, rises due to the biasing force of the spring 25 acting on itself, and the diaphragm 23 returns to its normal state when the liquid supply is stopped.
The small ball 24 is again locked by the locking rod 22 integrated with the locking rod 22 (FIG. 2(V)).

When a preset time has elapsed from this state, that is, a period of 2 to 3 seconds until the flash disappears, the motor control means 53 starts the pump motor 43 again in response to a signal from the clock means 52.

As a result, the liquid flowing into the cylinder body 3 moves the movable valve seat 19 down again against the spring 17, and the movable valve seat 19 and the main valve 1
6 and open the flow path opening 188, returning to the liquid supply state again (FIG. 2 (1ii)).

After this fluid supply restart operation, the mouth end of the air flow pipe 5 on the pipe tip 2 side is closed again by the millet, and the automatic valve closing mechanism 2o that operates at the same time lowers the valve rod 12 via the lever 30. , the main valve 16 lowered together with the pilot valve 14
When the liquid supply is stopped by touching the movable valve seat 19 (second
(Fig. 1V)) After that, the scissoring operation is repeated to perform intermittent liquid supply. When this operation is repeated several times, the motor control means 53 considers that the tank is full, and stops the pump motor 43 without receiving any further signals from the timer means 52 to stop all the supply. Terminate liquid operation.

By the way, in the above explanation, the main liquid supply and the additional liquid supply are performed with the same discharge amount, or the discharge amount from the liquid supply nozzle body 1 is adjusted by the signal from the timing means 52, for example, 45A during the main liquid supply. /min, 25A'/min at the first additional liquid supply, 15β/min at the second additional liquid supply.
The number of rotations of the pump motor 43 may be changed so that the number of rotations of the pump motor 43 becomes min.

Furthermore, in this embodiment, the pump motor 43 is stopped in response to a signal from the liquid supply stop detection means 51 to stop the liquid supply, or a control valve is installed in the pipeline system from the liquid supply pump 42 to the nozzle body 1. It is also possible to provide a control valve and cause the liquid feeding stop operation to be performed by this control valve.

It should be noted that the above is a description of the automatic liquid supply operation, but in the device according to the present invention, the desired amount of liquid can be supplied by manually opening and closing the lever 30 as appropriate, and the liquid supply control device 150 It is also possible to perform preset liquid supply by providing a memory subtracting means in the device and reducing the supply amount from a pre-input stored value and terminating the main liquid supply operation when the remaining quantity becomes zero.

(Effects) As described above, according to the present invention, the first valve is moved to the liquid-permeable position by the liquid pressure in the pipe, and the liquid-permeable position is operated via the valve closing means activated by liquid level detection. By using a liquid supply nozzle equipped with a second valve that closes the passage of the first valve in the mold, the liquid supply of the liquid supply means is stopped for a certain period of time each time the liquid supply nozzle stops supplying liquid. , it is possible to automate the entire operation of filling the tank, and the manpower required for this type of liquid supply can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of a liquid supply nozzle according to an embodiment of the present invention, Figs. 2 (1) to (V) are explanatory views showing its liquid supply operation, and Fig. 3 is a total A schematic configuration diagram of the sword, FIG. 4 is a diagram showing the control equipment. 1...Liquid supply nozzle body 12...Valve rod 14.
... Pilot valve 16 ... Main valve 19 ...
Movable valve seat 20... Automatic valve closing mechanism 30...
・Lever 40...Measuring device 1042...
liquid supply pump

Claims (1)

[Claims] A first valve that is displaced to a liquid-permeable position by hydraulic pressure in the pipe, and a second valve that closes the passage of the valve in the liquid-permeable position through a valve closing means that is activated by liquid level detection. A liquid supply device comprising a liquid supply nozzle and a liquid supply means that repeatedly stops the liquid supply for a certain period of time each time the liquid supply nozzle stops supplying liquid.