JPS63640Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention makes it possible to automatically stop refueling when the fuel tank is almost full and the amount of refueling reaches an integer value with just one lever operation. This relates to a refueling device.

A refueling device that is provided with a pump, a flow meter, and an on-off valve in the middle of a pipe whose one end is connected to an oil storage tank, and a refueling nozzle equipped with an automatic valve closing mechanism at the tip of the pipe, the refueling device providing a vehicle BACKGROUND OF THE INVENTION Fuel supply systems have conventionally been known in which, when refueling a fuel tank, the liquid level is detected and an automatic valve closing mechanism is activated to automatically close the main valve. In such prior art refueling devices, the automatic valve closing mechanism of the refueling nozzle often closes before the refueling reaches a so-called "full" state due to bubbling in the fuel tank. After that, the gas station worker replenishes the fuel tank with oil little by little while operating the refueling lever again, until the tank is actually "full".
The reality was that fuel was added until the counter reached an integer value.

For this reason, refueling work is troublesome, and if an inexperienced refueling worker operates the refueling nozzle, the oil fluid suddenly flows out, which may lead to an accident in which the oil fluid overflows from the fuel tank. On the other hand, to make monetary calculations easier, for example, the indicated value of a counter is
In the case of 38.26 liters, there is also a known refueling device that automatically stops refueling when it reaches the next integer value, that is, 39.00 liters, when the refueling nozzle is operated again. Since it starts working when it is activated, it also has the disadvantage that it often stops at an integer in the middle, even though it can still replenish several liters of oil, so it often does not reach a completely full integer.

The present invention has been developed in view of the problems of the prior art, and it is an object of the present invention to provide a refueling device that is capable of refueling an integral number of full tanks by operating the refueling nozzle only once.

In order to achieve this object, the present invention provides a liquid delivery means consisting of a pump and a measuring means consisting of a flowmeter for measuring the amount of liquid delivered by the liquid delivery means in the middle of a pipe whose one end is connected to an oil storage tank. and a refueling nozzle provided at the other end of the piping, wherein the refueling nozzle is provided with:
a first liquid level detection mechanism that detects the liquid level in the fuel tank; and a second liquid level detection mechanism that detects that the liquid level has risen further than the liquid level detected by the first liquid level detection mechanism; a diaphragm mechanism provided in the flow path of the piping or the refueling nozzle that throttles the flow path based on the output of the first liquid level detection mechanism; and an integer amount refueling device connected to the measuring means and outputting a signal for each integer. a detection device; a refueling stop control device that outputs a refueling stop signal when the output from the integer quantity refueling detection device matches the output from the second liquid level detection mechanism; and a refueling stop control device provided in the middle of the piping. and a refueling stop device that stops refueling when a refueling stop signal is input from the refueling stop control device.

With this configuration, after the refueling nozzle starts refueling, when the first liquid level detection mechanism detects the liquid level or foam level in the tank,
The flow path is throttled by the throttling mechanism to reduce the discharge flow rate, the second liquid level detection mechanism detects that the liquid level has further risen, and the integer quantity lubrication detection device has reached the integer quantity of lubrication. When this is detected, a refueling stop signal is output from the refueling stop control device to the refueling stop device, and the refueling is stopped by the refueling stop device, thereby making it possible to perform a full integral number of refuelings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, Fig. 1 shows a system diagram with the front panel removed when the refueling system of this embodiment is a fixed gasoline metering device, where 1 is the frame of the metering device, 2 is the pump, and 3 is the pump. a motor for driving 2, 4
5 is a counter that displays the flow rate measured by the flow meter 4; 6 is a normally open electromagnetic on-off valve that closes in response to a signal to be described later; 7 is a fixed pipe. Each is shown below. One end of the fixed pipe 7 is connected to an oil storage tank (not shown), and the other end is connected to a pump 2, a flow meter 4, and an electromagnetic on-off valve 6.
A hose 8 serving as flexible piping is connected through these in sequence. 9 is a second tube provided at the tip of the hose 8.
This is a refueling nozzle with an automatic valve closing mechanism as shown in the figure. Further, 10 is activated by a switch described later when the fuel tank is near a "full" state, and thereafter, when the amount of refueling reaches an integer value for the first time, the solenoid 6A of the electromagnetic on-off valve 6 is energized to open/close the electromagnetic on/off valve. This is an integer stop device that closes the valve 6.

Next, the specific structure of the oil supply nozzle 9 is shown in FIG. In the figure, 11 is a nozzle body, inside which a flow path 12 is formed, a hose 8 is connected to one end of the flow path 12, and a discharge pipe 1 is connected to the other end.
The tip 13A of the cylinder is opened to the outside through the hole 3. The main valve 14 is provided in the nozzle body 11, and the main valve 14 includes a valve body 15 that opens and closes the flow path 12, a valve seat 16 formed in the nozzle body 11, and a valve body 15 that is connected to the nozzle body 11 from outside. Valve stem 17 to open and close
and a spring 18 that constantly presses the valve body 15 against the valve seat 16. Further, the valve body 15 is provided with a throttle passage 1 through which the oil fluid in the flow path 12 flows with a throttling effect even when the valve body 15 is seated on the valve seat 16.
9 is drilled.

Further, the nozzle body 11 is provided with an automatic valve-closing mechanism 20 that automatically closes the valve body 15 when the valve body 15 is in the open state. That is, the nozzle body 11 has a through hole 2 having a large-diameter stepped portion on the upper side.
A cylindrical support rod 22 having a small diameter stepped portion is slidably inserted into the through hole 21, and the lower end of the support rod 22 protrudes from the through hole 21 to form a fulcrum 23. A lever 24 is rotatably mounted around the center. A hole 25 is bored in the upper part of the support rod 22 in the radial direction, and a ball 2 is inserted into the hole 25.
6 has been inserted. Further, the support rod 22 is urged upward in the figure by a spring 27 stretched in the through hole 21. A diaphragm 28 is stretched above the through hole 21 and defines a first negative pressure chamber A and a first atmospheric chamber B. A spring 29 is tensioned in the first negative pressure chamber A, and urges the diaphragm 28 downward in the figure. Further, a stepped needle 30 is provided on the side of the first atmospheric chamber B, fixed to the diaphragm 28, and the large diameter portion of the needle 30 is connected to the support rod 28.
The ball 26 is inserted into the large diameter portion of the needle 22 and is sandwiched between the step of the through hole 21 and the step of the needle 30, thereby restricting the downward movement of the support rod 22.

Next, reference numeral 31 denotes an automatic valve installed near the mounting position of the discharge pipe 13 in the flow path 12, and the automatic valve 31 includes a valve body 32 and a valve seat 33 formed on the nozzle body 11.
It is composed of a valve stem 34, a support member 35 that supports the valve stem 34, and a spring 36 that constantly presses the valve body 32 against the valve seat 33. Around the support member 35, a communication groove 35A, 35A, . . . are formed.
Thus, when the oil flows into the flow path 12, the automatic valve 31 automatically adjusts the valve opening according to the flow rate, thereby giving a predetermined flow velocity to the oil flowing through this part. It is something.

Furthermore, a switch box 37 is provided at the top of the nozzle body 11. A diaphragm 38 is stretched within the switch box 37 to define a second negative pressure chamber C and a second atmospheric chamber D. A switch 39 that is activated when the diaphragm 38 is displaced downward in the figure, and a spring 40 that biases the diaphragm 38 upward in the figure are provided in the second negative pressure chamber C. Atmospheric chamber D
is in continuous communication with the atmosphere through the hole 41. The switch 39 is connected to an integer stop device 10 provided within the frame 1.

In the figure, 42 is a first detection hole drilled near the tip 13A of the discharge pipe 13;
One end of a first negative pressure pipe 43 provided along the inner wall of the discharge pipe 13 is attached to the nozzle main body 11 , and the first negative pressure pipe 43 passes through the nozzle body 11 on the way and is branched within the nozzle body 11 . One end opens at the position where the valve seat 33 of the automatic valve 31 is formed, and the other end opens into the first negative pressure chamber A of the automatic valve closing mechanism 20. And these first detection holes 4
2 and the first negative pressure pipe 43 form a first liquid level detection mechanism.

On the other hand, the discharge pipe 13 has a first detection hole 42.
A second detection hole 44 is bored at a position closer to the proximal end. The second detection hole 44 has a second
One end of a negative pressure pipe 45 is attached, and the second negative pressure pipe 45 is connected to the discharge pipe 13 similarly to the first negative pressure pipe 43.
extends along the inner wall of the nozzle body 11, passes through the nozzle body 11 on the way, and branches within the nozzle body 11,
One end opens at the position where the valve seat 33 of the automatic valve 31 is formed, and the other end opens into the second negative pressure chamber C of the switch box 37. The second detection hole 44 and the second negative pressure pipe 45 form a second liquid level detection mechanism.

Furthermore, 46 is a tape-shaped switch attached to the outer circumferential wall of the discharge pipe 13 closer to the proximal end than the second detection hole 44, and the tape-shaped switch 46 is connected to the motor 3 so that the discharge pipe 13 is injected with fuel when refueling. When inserted into the fuel filler port of the tank, the motor 3 is started by coming into contact with the wall of the fuel filler port,
When the motor 3 is pulled out from the fuel filler port of the fuel tank.
It is configured to stop the moreover,
Reference numeral 47 in the figure is a hook for holding the lever 24 in the raised state, and when the automatic valve closing mechanism 20 is activated, the lever 24 is detached from the hook 47 by the impact.

Next, the specific structure of the integer stop device will be explained based on FIG. In the figure, reference numeral 48 denotes a pulse transmitter connected to the rotating shaft of the flow meter 4, and the pulse transmitter 48 is connected to a counting circuit 49. The output side of the counting circuit 49 is connected to the counter 5 and also to an integral quantity refueling detection device 50. The integer quantity refueling detection device 50 produces an output each time the refueling quantity reaches an integer quantity such as 1 liter, 2 liters, 3 liters, etc., and this output is sent to an AND circuit 51 as a valve closing circuit. A switch 39 is connected to the AND circuit 51, and the output side of the AND circuit 51 is connected to the solenoid 6A of the electromagnetic on-off valve 6, forming the refueling stop control device of this embodiment.

The oil supply system according to this embodiment is configured as described above, but when no oil is being supplied, the motor 3 is stopped and the solenoid 6A of the electromagnetic on-off valve 6 is demagnetized and in an open state.

Therefore, when the refueling nozzle 9 is inserted into the refueling port of the fuel tank, the tape-shaped switch 46 is activated, the motor 3 is rotated, and the pump 2 is driven, thereby supplying oil to the refueling nozzle 9. Ru. In this state, when the lever 24 of the refueling nozzle 9 is pulled, the main valve 1
The valve body 15 of No. 4 is opened, and the oil fluid flows through the flow path 12. By opening the automatic valve 31 according to the flow rate, the oil fluid is supplied from the tip 13A of the discharge pipe 13 to the fuel tank. Ru. At this time, automatic valve 31
Since the area of the flow path is narrowed down, the flow rate of the oil passing through this area becomes faster. Therefore, the air within the first and second negative pressure pipes 43 and 45 is sucked into the flow path 12 due to the Bench-Lily effect. However, the first
Since the second negative pressure pipes 43 and 45 communicate with the first and second detection holes 42 and 44, which are open to the atmosphere, respectively, the first and second negative pressure chambers A and C have negative pressure. There isn't.

In this state, when the lever 24 is hooked to the hook 47 and the refueling operation is continued, the liquid level in the fuel tank rises and the first detection hole 42 is closed. For this reason, the first negative pressure pipe 43 is no longer supplied with air, and the first negative pressure chamber A becomes negative pressure, and the first atmospheric chamber B
A pressure difference occurs between the As a result, the diaphragm 28 and the needle 30 are pulled upward in the figure against the spring 29. Then, when the needle 30 is displaced, the restriction of the support rod 22 by the ball 26 located at the stepped portion of the through hole 21 and the stepped portion of the needle 30 is released, and the support rod 22 is moved by the spring 18 of the main valve 14.
The valve body 15 is displaced downward by the spring force and the hydraulic pressure acting on the valve body 15, and the valve body 15 is seated on the valve seat 16.
As a result, most of the fuel tank was quickly supplied with oil at a large flow rate.

However, since the valve body 15 is provided with the throttle passage 19, the flow of the oil continues at a small flow rate even after the main valve 14 is closed. When the supply of oil becomes a small flow rate in this way, the valve body 32 of the automatic valve 31 is displaced to the right in the figure, so the flow path area in this part is further narrowed and the flow velocity becomes high. maintained. Then, when the liquid level in the fuel tank closes the second detection hole 44, air is no longer replenished into the second negative pressure pipe 45, so the inside of the second negative pressure chamber C becomes negative pressure. Therefore, a pressure difference is generated between the second negative pressure chamber C and the second atmospheric chamber D, the diaphragm 38 is displaced downward, the switch 39 is pushed by the diaphragm 38, and the switch 39 is closed. is input to the AND circuit 51. On the other hand, the integer amount refueling detection device 50 receives the counting signal every moment from the counting circuit 49 and sends a signal every integer count value, so after the switch 39 is closed, the refueling amount first becomes an integer value. When a signal indicating that the temperature has passed is input, a matching signal is transmitted from the AND circuit 51, and the solenoid 6A is energized.
is forced to close. As a result, the inside of the fuel tank is reliably "full" and the amount of refueling becomes an integer value, thus completing the refueling operation. Here, the tape-shaped switch 46 is provided at the base of the discharge pipe 13 so that about 1 liter of oil can be supplied from the position where the liquid level reaches the second detection hole 44.
Complete lubrication is possible without spilling oil to the outside. Therefore, when the refueling nozzle 9 is pulled up from the fuel tank, the tape-shaped switch 46 is opened and the motor 3 is opened.
When the rotation of the electromagnetic on-off valve 6 stops, the electromagnetic on-off valve 6 opens.

In this way, by continuing refueling at a small flow rate even after the main valve 14 is closed, even if the first detection hole 42 is blocked due to foaming or the like during high flow refueling, the tank is reliably almost "full". Refueling continues until the condition is met. For this purpose, there is no need for the refueling operator to operate the lever again.

In the above-mentioned embodiment, the first and second liquid level detection mechanisms are composed of first and second detection holes 42 and 44 and first and second negative pressure pipes 43 and 45, and the pressure generated by the flow of oil is generated by the flow of oil. Although it was described as using negative pressure to
They may be ones that optically detect the liquid level. In addition, although the flow channel throttling mechanism has been described as having the throttling passage 19 provided in the valve body 15 of the main valve 14 of the refueling nozzle 9, a branch pipe and a solenoid valve are provided in the middle of the piping 7 to first check the liquid level. It is also possible to have a configuration in which the solenoid valve is closed when this is detected, and the oil liquid is supplied only from the branch pipe. Furthermore, although the electromagnetic on-off valve 6 is used as a means for stopping the refueling, if the rotation of the motor 3 is stopped by the coincidence signal from the AND circuit 51, the electromagnetic on-off valve 6
There is no need to provide Furthermore, although the integer quantity refueling detection device 50 has been described as being configured to emit a signal every time the refueling amount reaches an integer value, if a display meter is attached to display the refueling fee, the refueling fee may be It can also be configured to emit a signal every time a certain amount, such as 100 yen, 200 yen, 300 yen, etc., is added.

The refueling device according to the present invention, as described in detail above, uses the first liquid level detection mechanism to detect when the fuel tank is nearly full, throttles the flow rate, and adjusts the fuel level to the second level. When the detection mechanism detects the liquid level, the signal is used to stop refueling at the next integer value, so a single lever operation ensures that the fuel tank is almost full and the amount of refueling is adjusted. Refueling becomes convenient because the fuel is refilled until the numerical value is reached.

[Brief explanation of the drawing]

Fig. 1 is a system diagram with the front panel removed when the refueling device according to the embodiment of the present invention is a fixed gasoline metering device; Fig. 2 is a vertical sectional view of the refueling nozzle used in the embodiment of the present invention; FIG. 3 is a circuit diagram of an integer stop device. 2...Pump, 4...Flowmeter, 6...Solenoid on-off valve, 7...Fixed piping, 8...Hose, 9...Refueling nozzle, 12...Flow path, 14...Main valve, 19...
Throttle passage, 39...Switch, 42...First detection hole, 43...First negative pressure pipe, 44...Second detection hole, 45...Second negative pressure pipe, 50...Integer amount oil supply Detection device, A...first negative pressure chamber, C...second negative pressure chamber.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A liquid delivery means consisting of a pump and a measuring means consisting of a flow meter for measuring the amount of liquid delivered by the liquid delivery means, disposed in the middle of a pipe whose one end is connected to an oil storage tank; and a refueling nozzle at the other end of the pipe, the first liquid level detection mechanism being provided in the refueling nozzle and detecting the liquid level in the fuel tank;
a second liquid level detection mechanism that detects that the liquid level has risen further than the liquid level detected by the liquid level detection mechanism; a throttling mechanism that throttles the flow path based on the output of the mechanism; an integer amount lubrication detection device that is connected to the measuring means and outputs a signal for each integer; and an output from the integer amount lubrication detection device and the second
When the output from the liquid level detection mechanism matches,
A refueling stop control device that outputs a refueling stop signal; and a refueling stop device that is provided in the middle of the piping and stops refueling when the refueling stop signal is input from the refueling stop control device. A refueling device featuring: (2) The refueling device according to claim (1), wherein the throttle mechanism is provided in a valve body of a refueling nozzle. (3) The refueling device according to claim (1), wherein the integer amount refueling detection device emits a signal every time the refueling amount reaches an integer value. (4) The refueling device according to claim (1), wherein the integer quantity refueling detection device emits a signal every time a predetermined amount is added to the refueling fee. (5) The refueling device according to claim (1), wherein the refueling stop device is the pump that stops rotating upon input of the refueling stop signal. (6) The utility model registration claim (1) is that the refueling stop device is an on-off valve that is located downstream of the pump and is provided in the middle of the piping, and that closes when the refueling stop signal is input. Lubricating device as described.