JPH05294397A - Oil filling apparatus - Google Patents

Abstract

PURPOSE:To prevent mixed oil from being filled by a metering device and improve safety by a method wherein in the case gasoline is filled in a kerosene or gas oil tank by mistake, mixed oil can be automatically, certainly discovered and oil filling is stopped every time and at the time when oil filling by the metering device is started. CONSTITUTION:A nozzle switch 11 as an oil filling start detector, a gas sensor 17 as a gasoline vapor detector and an AND-circuit 27 as a pump locking device are provided. The nozzle switch 11 detects the start of kerosene or gas oil filling. The gas sensor 17 is mounted on a gas-liquid separator provided on an oil feed pump 5 or on an air vent leading to the gas-liquid separator and detects gasoline vapor. The And-circuit 27 is activated by the outputs from both detectors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device installed in a gas supply station for supplying fuel such as gasoline or light oil to an automobile or the like.

[0002]

2. Description of the Related Art Gas is the main fuel used at such gas stations, but in addition to diesel oil, which is fuel for diesel vehicles,
There is kerosene used for household heating appliances. These gasoline, light oil, and kerosene are stored in separate underground tanks, and are supplied to automobiles, kerosene containers, etc. by respective weighing machines.

When the amount of fuel stored in the underground tank is reduced by refueling with a weighing machine, fuel is replenished from the tank truck to the underground tank. In this case, however, gasoline may be mistakenly replenished to the underground tank of light oil or kerosene. If diesel oil or kerosene mixed with such gasoline is supplied to a diesel vehicle or a kerosene container, engine trouble or fire may occur, which is dangerous.

Therefore, when gasoline is mixed into an underground tank of light oil or kerosene, it is necessary to detect it. Conventionally, when refueling a tank of an automobile or a kerosene container, the color and odor cause the oil type to change. I was checking.

[0005]

As described above, in the method of confirming with a human sense when refueling a tank or a container, not only the certainty of the judgment is lacked but also the confirmation may be forgotten, resulting in lack of safety. It is a danger. Further, if the mixed oil is found after the end of the refueling, the subsequent processing is troublesome.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and when gasoline is accidentally injected into an underground tank of light oil or kerosene, this can be detected automatically and reliably at every refueling. The purpose of the present invention is to provide a refueling device capable of automatically stopping refueling when fuel mixture is discovered and ensuring sufficient safety.

[0007]

In order to achieve the above object, the present invention has a vapor detecting means provided in a gas-liquid separation chamber attached to an oil supply pump or an air vent communicating with the gas-liquid separation chamber, and oil type data storage. The gist of the invention is to provide an erroneous oil type judging means for judging an erroneous oil type by receiving signals from the means and both means, and a pump lock means operated by the output of the means.

[0008]

According to the present invention, if gasoline is mistakenly replenished to the kerosene or light oil storage tank, the gasoline mixed with kerosene when the oil pump is operated to start refueling the kerosene container or the like. The generated gasoline vapor is detected by the vapor detection means. Then, the erroneous oil type determination means determines that the oil type is erroneous, and the pump lock means is activated by the output from the means to immediately stop the fuel supply automatically.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a refueling device of the present invention, in which 1 is a kerosene weighing machine, 2 is an underground tank of kerosene, and a refueling pipe 3 communicating with the underground tank is a housing of the kerosene weighing machine 1. 1a, the oil supply pump 5 connected to the oil supply motor 4 and the flow meter 7 connected to the flow rate pulse transmitter 6 are arranged in the middle of the oil supply pipe 3, and the oil supply pipe 3 on the discharge side of the oil supply pump 5 is Refueling nozzle 8 at the tip outside housing 1a
The refueling hose 9 having is connected.

Further, a display 10 for displaying refueling data such as the amount of refueling is provided on the front surface of the housing 1a, and a nozzle switch 11 for turning on and off is provided on the nozzle hook in conjunction with the unplugging of the oil filler nozzle 8.

In the underground tank 2, an air vent 13 standing upright adjacent to the fire wall 12 is opened, and a lower end of an oiling pipe 14 having a coupling 14a with a tank truck at its tip is opened.

A gas sensor 17 as a vapor detecting means for detecting a gasoline vapor is provided in a gas-liquid separation chamber incorporated in a pump device 15 in which an oil supply pump 5 is arranged in the oil supply device having such a structure. The gas sensor 17 is configured to output a different signal depending on the type of vapor detected as an ultrasonic type or a combustion type.

FIG. 2 is a vertical sectional front view of a portion of the pump device 15. The oil supply pump 5 is arranged in a casing 15a having an inflow port 18 and an outflow port 19. The suction port 5a of the oil supply pump 5 is a strainer. The discharge port 5b of the oil supply pump 5 is communicated with the inflow port 18 through the chamber 20 and the gas-liquid separation device 21.

The liquid flowing radially outside of the gas-liquid separating device 21, that is, the liquid containing no bubbles, is a strainer chamber on the outflow side.
A flow path is formed so as to flow to the drain 22, and the strainer chamber 22 communicates with the outlet 19 of the casing 15a.

On the other hand, the liquid containing bubbles flowing inward in the gas-liquid separation device 21 is passed through the flow path 23 to form a gas-liquid separation chamber.
The gas-liquid separation chamber 16 is provided with an air vent 24 for discharging the gas separated here. In the present invention, the gas sensor 17 is arranged in the upper space inside the gas-liquid separation chamber 16.

As described above, the housing 1 of the weighing machine 1
A control device 25 using a microcomputer or the like is provided in a, and as shown in the control block diagram of FIG. 3, the ON signal of the nozzle switch 11 is introduced into the AND circuit 27 as a refueling start signal and the flow pulse is transmitted as a zero return signal. The pulse signal of the instrument 6 is introduced into the counting means 26 to which the pulse signal is input. Then, the count signal of the counting means 26 was introduced into the display 10.

Further, the ON signal of the nozzle switch 11 is introduced into the gas sensor 17 as an operation signal, and the detection signal from the gas sensor 17 is introduced into the oil type judging means 28. This judgment means 28 receives the output from the oil type data storage means 29 in which data such as the vapor concentration of gasoline and kerosene and the speed of sound of each of the ultrasonic waves generated during vaporization of gasoline and kerosene are stored. , Has a function of determining whether the vapor detected by the gas sensor 17 is of kerosene or gasoline, introduces an OK signal in the case of kerosene to the AND circuit 27, and outputs from the AND circuit 27. The drive signal was introduced to the refueling motor 4. On the other hand, the NO signal for gasoline is introduced into the alarm 30.

As described above, the nozzle switch 11 constitutes refueling start detecting means, the gas sensor 17 constitutes vapor detecting means, and the AND circuit 27 constitutes pump locking means.

Next, the operation will be described. When gasoline is accidentally injected into the underground tank 2 of kerosene, the pumping device 15 is used because gasoline has a larger evaporation power than kerosene.
Most of the gas separated in the gas-liquid separation chamber 16 is gasoline vapor.

In this state, in order to refill the container using the weighing machine 1, if the refueling nozzle 8 is removed from the nozzle hook, the nozzle switch 11 is turned on in conjunction with this, and this on signal is returned to the counting means 26. It enters as a zero signal and the previous amount of refueling is zeroed, and the on signal enters the AND circuit 27.

Further, the ON signal of the nozzle switch 11 enters the gas sensor 17 to detect the start of refueling, and operates the gas sensor 17. As a result, the gas sensor 17 starts the detection operation, detects the vapor in the gas-liquid separation chamber 16 of the pump device 15, and outputs a detection signal to the erroneous oil type determination means 28.

The determination means 28 extracts oil type data from the oil type data storage means 29, and the concentration is high based on the detected vapor concentration and the sound velocity of ultrasonic waves. If the sound velocity is slow, the detected vapor is gasoline. To judge.

Therefore, the NO signal is output to the alarm device 30 to operate the alarm device 30 to notify that the gasoline is mixed in the underground tank 2 of kerosene. In this case, since there is no output from the judging means 28 to the AND circuit 27, even if the ON signal from the nozzle switch 11 is input to the AND circuit 27, the AND circuit 27 functions as pump lock means and the refueling motor 4 Does not drive.

On the other hand, when there is no erroneous oil type and all the underground tank 2 is kerosene, the erroneous oil type determining means 28 determines that the oil is kerosene, and an OK signal from this is input to the AND circuit 27.
Since the ON signal has already been input to the AND circuit 27 when the refueling nozzle 8 is removed from the nozzle hook,
When the K signal is input, a drive signal is output from the AND circuit 27 to the refueling motor 4 to turn it on. Therefore, in this case, refueling is possible.

In this way, each time the fuel nozzle 8 is detached and fuel is replenished, it is judged whether or not the vapor in the gas-liquid separation chamber 16 of the pump device 15 is of kerosene. Refueling becomes impossible.

In the first embodiment, the gas sensor 17
Although the gas-liquid separation chamber 16 of the pump device 15 was installed at the location, the present invention is not limited to this, and as shown in FIG. 4 in the second embodiment, the air vent 24 communicating with the gas-liquid separation chamber 16 is provided in the middle. May be installed.

[0027]

As described above, the oil supply device of the present invention is
If you accidentally fill gasoline into an underground tank of kerosene or light oil, each time you try to start refueling a kerosene container, you can automatically and surely find a mixed oil and prevent refueling. Therefore, it is possible to reliably prevent the mixed oil from being refueled, and it is possible to improve the safety.

[Brief description of drawings]

FIG. 1 is an explanatory view of an oil supply device of the present invention.

FIG. 2 is a vertical sectional front view showing a first embodiment of a pump device which is a main part of the oil supply device of the present invention.

FIG. 3 is a control block diagram of the oil supply device of the present invention.

FIG. 4 is a vertical sectional front view showing a second embodiment of a pump device which is a main part of the oil supply device of the present invention.

[Explanation of symbols]

1 ... Kerosene weighing machine 1a ... Housing 2 ... Underground tank 3 ... Refueling pipe 4 ... Refueling motor 5 ... Refueling pump 5a ... Suction port 5b ... Discharge port 6 ... Flow rate pulse transmitter 7 ... Flowmeter 8 ... Refueling nozzle 9 ... Refueling hose 10 ... Indicator 11 ... Nozzle switch 12 ... Fire fence 13 ... Air vent 14 ... Lubrication pipe 14a ... Coupling 15 ... Pump device 15a ... Casing 16 ... Gas-liquid separation chamber 17 ... Gas sensor 18 ... Inlet 19 ... Outlet 20 ... Strainer chamber 21 ... Gas-liquid separation device 22 ... Strainer chamber 23 ... Flow path 24 ... Air vent 25 ... Control device 26 ... Counter means 27 ... And circuit 28 ... Erroneous oil type determination means 29 ... Oil type data storage means 30 ... Informer

Claims (1)

[Claims] 1. An erroneous oil type is determined by receiving signals from a vapor detection means provided in a gas-liquid separation chamber attached to an oil supply pump or an air vent communicating with the gas-liquid separation chamber, an oil type data storage means, and both means. And a pump lock means that operates by the output of the means.