JPH05278796A - Mal-oil-filling detector - Google Patents

Abstract

PURPOSE:To early and certainly perceive a mal-oil-filling to improve safety when gasoline is filled by mistake by detecting vapor from a kerosine or gas oil storage tank. CONSTITUTION:Vapor in an air vent 8 is detected by a gas sensor 9 for a specified period of time after oil filling starts, and the detected signal is sent to a control panel 3 to judge the occurrence of mal-oil-filling by an oil sort distinguishing device. When it is judged as a mal-oil-filling, an alarm 13 and a valve 6 are activated, so that the valve 6 is closed at the same time the mixing of gasoline is annunciated and a tank lorry is prevented from filling gasoline further.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erroneous lubrication detection 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, the fuel is replenished from the tank truck to the underground tank. In this case, if gasoline is mistakenly replenished to the underground tank of light oil or kerosene, the 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, the method of confirming with a human sense when refueling a tank or a container not only lacks certainty in determination but also forgets to confirm, which is unsafe and dangerous. Is.

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 reliably and at an early time when the injection is started. , To provide an erroneous lubrication detection device capable of ensuring sufficient safety.

[0007]

In order to achieve the above object, the present invention provides a vapor detection means for detecting vapor from an oil storage tank for kerosene or light oil, an oil type data storage means for the oil storage tank, and signals from both means. The gist of the invention is to provide an erroneous oiling judging means for receiving the erroneous oiling and judging an erroneous oiling, and an erroneous oiling notifying means operated by the output of the means.

[0008]

According to the present invention, when the gasoline is mistakenly replenished to the oil storage tank for kerosene or light oil, the gasoline vapor is detected by the vapor detecting means. Then, the erroneous lubrication determination means determines that erroneous lubrication has occurred, and the output from this means activates the notifying means,
Notify that gasoline has been accidentally filled into the kerosene or light oil tank. Since such notification is performed in the initial stage of replenishment to the tank, the amount of oil mixed and wasted is small.

[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 an erroneous oiling detection device of the present invention, in which 1 is a kerosene weighing machine, 2 is an underground tank of kerosene, 3 is a control panel for refueling an underground tank 2, The oil supply pipe 4 opening at the bottom of the tank 2 is raised in the housing 1a of the kerosene weighing machine 1, and the tip of the oil supply pipe 5 for replenishment also opening at the bottom of the underground tank 2 is projected to the ground. A coupling 7 having a valve 6 for connecting with a tank truck was provided.

Further, a lower end of the air vent 8 is opened above the underground tank 2, and a gas sensor 9 which is a vapor detecting means is provided along the fire vent 10 while the air vent 8 is being started up. The gas sensor 9 is an ultrasonic type or a combustion type and is configured to output a different signal depending on the type of vapor by these means.

A liquid level gauge 11 for detecting the liquid level in the underground tank 2 is provided in the manhole above the underground tank 2, and the float
11a is suspended in the underground tank 2.

The control panel 3 is provided with an indicator 12 for displaying the amount of liquid in the underground tank 2 and an annunciator 13 for informing the underground tank 2 when gasoline is erroneously filled, and control using a microcomputer or the like. A device 18 is provided.

FIG. 2 is a control block diagram of the erroneous oiling detection device by the control device 18. The liquid level signal from the liquid level gauge 11 is introduced into the calculation means 14 for calculating the liquid level into the liquid amount, and the liquid from this is introduced. A quantity signal is introduced on the display 12. Further, the liquid level signal from the liquid level gauge 11 is introduced into the rise determination means 15 for detecting the rise of the liquid level, and the rise determination signal from this is introduced into the timer 16.

The timer 16 is set with an operating time of the gas sensor 9 which is, for example, 3 minutes, which is sufficient for detecting the gasoline vapor when erroneous lubrication is performed.
The starting signal from here is introduced into the gas sensor 9, and the vapor detection signal from the gas sensor 9 is erroneously judged as the lubrication judging means 17
The means 17 determines whether or not there is erroneous lubrication based on the oil type data signal in the underground tank 2 stored in the oil type data storage means 19 and the vapor detection signal from the gas sensor 9, If it is judged that there is lubrication, the operation signal
13 and valve 6 were introduced.

Next, the operation will be described. Underground tank 2
In order to add oil, the hose of the tank truck is connected to the oil supply pipe 5 via the coupling 7, and the oil is injected into the underground tank 2 from the tank of the tank truck. The oil level raises the liquid level in the underground tank 2 and the float 11a accordingly rises. When the liquid level signal is output from the liquid level gauge 11 to the calculating means 14, the liquid level is calculated as the liquid amount. The amount of lubrication is displayed on the display 12.

At the same time, the liquid level signal of the liquid level gauge 11 rises
When it enters 15, it is judged that the lubrication has started here due to the change in the liquid level, and the lubrication start signal is output to the timer 16. As a result, the timer 16 outputs the gas to the gas sensor 9, and the gas sensor 9 operates only for the time set in the timer 16, for example, 3 minutes.

In this way, the vapor in the air vent 8 is detected by the gas sensor 9 for 3 minutes after the start of lubrication, and this detection signal is input to the oil type determination means 17. The oil type determination means 17 determines the presence or absence of erroneous lubrication based on the detection signal and the oil type data signal from the oil type data storage means 19. If it is determined that erroneous lubrication has been performed, it is output to the alarm 13 and the valve 6. As a result, the alarm 13
Is activated to notify that the gasoline is mixed, and at the same time, the valve 6 is closed to prevent further fueling of gasoline from the tank truck.

Although the gas sensor 9 is installed in the middle of the air vent 8 in the above-mentioned embodiment, it is not limited to this, and it may be any place where vapor from the underground tank 2 can be detected. It may be installed in the tank 2.

Further, the data for judging the start of lubrication is not limited to the liquid level rise as in the above embodiment, but a coupling connection detection switch is provided at the position of the coupling 7, and the tank 7 is connected to the tank truck. The start of lubrication may be determined based on the fact that the hose of is connected.

[0020]

As described above, in the case of accidentally injecting gasoline into the underground tank of kerosene or light oil, the erroneous oiling detection device of the present invention can detect the erroneous oiling early and surely when the oiling is started. Moreover, since it is possible to prevent further lubrication, it is possible to prevent the mixed oil from being fed by the weighing machine, and it is possible to improve the safety.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a gas station in which an erroneous lubrication detection device of the present invention is installed.

FIG. 2 is a control block diagram of the erroneous oiling detection device of the present invention.

[Explanation of symbols]

 1 ... Kerosene weighing machine 1a ... Housing 2 ... Underground tank 3 ... Control panel 4 ... Oil supply pipe 5 ... Lubrication pipe 6 ... Valve 7 ... Coupling 8 ... Air vent 9 ... Gas sensor 10 ... Fire fence 11 ... Liquid level gauge 11a ... Float 12 ... Display 13 ... Alarm 14 ... Calculation means 15 ... Ascent determination means 16 ... Timer 17 ... False oiling determination means 18 ... Control device 19 ... Oil type data storage means

Claims (1)

[Claims] 1. A vapor detection means for detecting vapor from a kerosene or light oil storage tank, an oil type data storage means for the oil storage tank, and an erroneous lubrication determination means for receiving erroneous lubrication by receiving signals from both means. Erroneous-lubrication detection device provided with erroneous-lubrication notification means that operates with the output of the means.