JP3163740B2 - Mis-lubrication detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Gasoline is mainly used for fueling at such refueling stations.
There is kerosene used for household heating appliances and the like. These gasoline, light oil, and kerosene are stored in separate underground tanks, respectively, and supplied to automobiles, kerosene containers, and the like by respective weighing machines.

[0003] When the amount of fuel stored in the underground tank decreases due to refueling by the weighing machine, fuel is replenished from the tank lorry to the underground tank. In this case, if gasoline is refilled into the underground tank of light oil or kerosene, the engine is refueled. There is a risk of trouble or fire, which is dangerous.

Therefore, when gasoline is mixed in the underground tank of gas oil or kerosene, it is necessary to detect this. However, conventionally, when oil is supplied to the tank or kerosene container of an automobile, the oil type is determined by its color and smell. I was checking.

[0005]

The method of confirming with a human sense when refueling a tank or a container not only lacks the certainty of the judgment but also forgets the confirmation, and thus lacks safety and is dangerous. It is.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the prior art, and to detect gasoline accidentally injecting gasoline into an underground tank of light oil or kerosene, and to detect this as soon as possible after the start of oiling. Another object of the present invention is to provide an erroneous lubrication detecting device capable of sufficiently ensuring safety.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vapor detecting means for detecting vapor from a kerosene or light oil storage tank and outputting a different detection signal depending on the type of vapor. It is installed at a location where vapor from the oil storage tank can be detected, and the controller that receives the vapor detection signal from the vapor detection means detects the oil type data storage means of the oil storage tank and detects the liquid level in the oil storage tank. Deciding means for judging the rise of the liquid level based on the liquid level signal from the liquid level gauge to be performed, and erroneous lubrication upon receiving the vapor detection signal from the vapor detecting means and the oil type data signal from the oil type data storage means. Erroneous lubrication judging means for judging the oil pressure, and the vapor detecting means is provided with an output from a timer which starts operation in response to an oiling start signal from the rise judging means. Operates only time that has been set in,
The gist of the invention is that the valve provided in the lubrication pipe to the oil storage tank is closed when the erroneous lubrication determining means determines that erroneous lubrication has occurred.

[0008]

According to the present invention, if gasoline is erroneously replenished to a kerosene or light oil storage tank, a rise in the liquid level due to the replenishment is detected by the rise judging means, and a timer is started in response to a lubrication start signal from there, and the vapor is started. The detecting means operates only for the time set by the timer, and the gasoline vapor generated by lubrication is detected by the vapor detecting means. Then, the detected vapor is compared with the oil type stored in the oil type data storage unit, and when the erroneous lubrication determining unit determines that the erroneous lubrication is performed, the valve provided with the lubrication pipe is output from the unit. Close and lubrication stops. Since such a stop is performed at an early stage of replenishing the tank, the amount of mixed oil and wasted oil is small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of an erroneous lubrication detecting apparatus according to the present invention. In FIG. 1, 1 is a kerosene meter, 2 is an underground tank of kerosene, 3 is a control panel for refueling the underground tank 2, An oil supply pipe 4 opening at the bottom of the tank 2 is set up inside the housing 1a of the kerosene meter 1, and a tip of an oil supply pipe 5 also opening at the bottom of the underground tank 2 protrudes to the ground. , A coupling 6 having a valve 6 for connecting to a tank lorry.

A lower end of an air vent 8 is opened at an upper portion of the underground tank 2, and a gas sensor 9 serving as a vapor detecting means is disposed on the air vent 8 along the fire protection fence 10 or the like. The gas sensor 9 is configured to output different signals depending on the type of vapor by these means as an ultrasonic type or a combustion type.

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

The control panel 3 is provided with a display 12 for displaying the amount of liquid in the underground tank 2 and an alarm 13 for notifying the underground tank 2 when gasoline is injected by mistake. The device 18 is provided.

FIG. 2 is a control block diagram of the erroneous lubrication detecting device by the control device 18. The liquid level signal from the liquid level gauge 11 is introduced into the calculating means 14 for calculating the liquid level into the liquid amount. The quantity signal is introduced into the display 12. In addition, the liquid level signal from the liquid level gauge 11 is introduced to a rise judging means 15 for detecting a rise in the liquid level, and a rise judgment signal from this is introduced to a timer 16.

The timer 16 is set to have a sufficient time for detecting gasoline vapor in the event of an erroneous lubrication, for example, 3 minutes, as the operation time of the gas sensor 9.
The start signal from this is introduced into the gas sensor 9 and the vapor detection signal from the gas sensor 9 is used as the erroneous lubrication determining means 17.
The means 17 determines the presence or absence of 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 determined that lubrication is present, an operation signal
13 and introduced into valve 6.

Next, the operation will be described. Underground tank 2
In order to lubricate the tank, the hose of the tank truck is connected to the lubrication pipe 5 via the coupling 7, and the oil is poured into the underground tank 2 from the tank of the tank truck. The oil level in the underground tank 2 rises due to lubrication, and the float 11a rises accordingly. When a liquid level signal is output from the liquid level gauge 11 to the calculating means 14, the liquid level is calculated into a 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.
At step 15, it is determined that lubrication has started with a change in the liquid level, and a lubrication start signal is output to the timer 16. As a result, the signal is output from the timer 16 to the gas sensor 9, and the gas sensor 9 operates for the time set in the timer 16, for example, three minutes.

In this way, for three minutes after the start of the lubrication, the vapor in the air vent 8 is detected by the gas sensor 9, and this detection signal enters the oil type determining means 17. The oil type judging means 17 judges 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, and outputs to the alarm 13 and the valve 6 when erroneous lubrication is judged. Thus, the alarm 13
Operates to notify the gasoline mixing, and at the same time, the valve 6 closes to prevent further oiling of the gasoline from the tank lorry.

In the above-described embodiment, the gas sensor 9 is installed in the middle of the air vent 8. However, the present invention is not limited to this. Any location where the vapor from the underground tank 2 can be detected may be used. It may be installed in the tank 2.

[0019]

As described above, the erroneous lubrication detection device of the present invention can be used to ensure that if oil is accidentally injected into an underground tank of kerosene or light oil, the erroneous lubrication is performed early and automatically at the time of starting the lubrication. Can be found and further lubrication can be prevented, so that it is possible to prevent the mixed oil from being supplied by the weighing machine, and to improve safety.

[Brief description of the 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 lubrication detecting device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Kerosene meter 1a ... Housing 2 ... Underground tank 3 ... Control panel 4 ... Oil supply pipe 5 ... Oil supply pipe 6 ... Valve 7 ... Coupling 8 ... Air vent 9 ... Gas sensor 10 ... Fire protection fence 11 ... Level gauge 11a ... Float 12… Display 13… Announcer 14… Computing means 15… Rise judgment means 16… Timer 17… Incorrect lubrication judgment means 18… Control device 19… Oil type data storage means

Claims (1)

(57) [Claims] 1. A vapor detecting means for detecting a vapor from a kerosene or light oil oil storage tank and outputting a different detection signal depending on the type of the vapor is installed at a location where the vapor from the oil storage tank can be detected, such as in the middle of an air vent. The control device to which the vapor detection signal from the vapor detection means is inputted, the liquid type data storage means of the oil storage tank, and the liquid level based on the liquid level signal from the liquid level gauge for detecting the liquid level in the oil storage tank. And a misjudgment determining means for judging mislubrication by receiving a vapor detection signal from the vapor detecting means and an oil type data signal from the oil type data storage means. The means operates for a time set in the timer based on an output from a timer which starts operation in response to a lubrication start signal from the rise determining means, and an erroneous lubrication determining means. A valve provided in a lubrication pipe for the oil storage tank is closed when it is determined that the lubrication is incorrect.