JPH0150677B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil mixture prevention device, particularly to an oil mixture prevention device when unloading a lorry.

Generally, when oil from a lorry is unloaded into an underground oil storage tank etc. through the stand side fueling port, the oil in the oil storage tank, for example, another oil other than gasoline,
For example, if kerosene is mistakenly injected, serious problems will occur, such as the tank becoming unusable unless the oil in the tank is drained and thoroughly cleaned.

An object of the present invention is to provide a device that prevents such oil mixture.

The oil mixture prevention device of the present invention includes a specific gravity measuring mechanism for determining the oil type based on the specific gravity of unloading oil, one connector that receives a signal according to the oil type in the oil storage tank, and The other connector is connected and receives a signal corresponding to the type of oil determined by the specific gravity measuring mechanism, and a determining mechanism determines whether the signals received by both connectors match or do not match, and the determining mechanism The specific gravity measuring mechanism is a mechanism that is operated by a tank and displays the judgment result, and the specific gravity measuring mechanism is operated by a tank into which unloading oil is introduced, and a specific gravity measuring mechanism of the oil type to be measured, which is arranged vertically movably in this tank. A plurality of floats having corresponding specific gravity differences, a reed switch that is opened and closed by the floating of the float, which is provided corresponding to the position where the plurality of floats float, and an oil type is determined by opening and closing the reed switch. a control box that determines the type of oil and allows the fluid to flow only through the fluid passages corresponding to the oil type, and the other connector has a plurality of fluid passages into which fluid is selectively introduced under the control of the control box; and a judgment fluid passage communicating with a mismatch judgment mechanism, and when said one connector is connected to said other connector, one end thereof communicates with each fluid passage of said other connector, and the other end communicates with a fluid passage for communication. It is characterized by comprising a plurality of fluid passages that are communicated with each other by passages, and a closing member that closes any of the fluid passages.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a tank truck, 2 is a stand-side refueling port of an underground oil storage tank, and 3 is a refueling pipe connecting this refueling port 2 and the tank truck 1. In the present invention, refueling is carried out through this refueling pipe 3. A portion of the oil to be produced is introduced into the specific gravity measuring mechanism 4, the specific gravity of the oil is measured, and the measurement results are added to the control box 5.

On the other hand, one connector 6A that receives a signal determined depending on the type of oil in the tank is attached to the side of the oil filler port 2 on the stand side. A signal is introduced according to the oil type, and an alarm is generated when the two oil types do not match.

As shown in FIG. 2, the specific gravity measuring mechanism 4 of the present invention guides the oil in the tank truck 1 through a valve 8 and a line 9 to the lower part of the tank 7, and provides an air vent 10 in the upper part of the tank 7. is equipped with floats E, F, and G whose specific gravity is, for example, 0.8>E>0.7>F and G, and reed switches e, f, and g that operate when these floats rise, so that the oil If the oil is gasoline (specific gravity 0.7), only floats F and G will rise and reed switches f and g will be closed. If the oil is kerosene (specific gravity 0.8), floats E, F and G will rise and reed switch e will be closed. ,f,g
is closed so that the oil type can be determined as a result.

In the specific gravity measuring mechanism 4 of the present invention, the difference in specific gravity between each float is small, but this can be determined extremely accurately by, for example, making the float a metal body with a cavity and changing the occupation ratio of the cavity and the metal part. Since the settings can be made, malfunctions will not occur.

As shown in FIG. 3, the connector 6A has four air passages 11a to 11d, an air passage 11e that internally connects the air passages, and a closing member 11f that closes any one air passage. The connector 6B has air passages 12a to 12d communicating with the air passages 11a to 11d of the connector 6A, and air passages 12a to 12.
For example, when _the type of oil in the underground oil storage tank is gasoline, only the air passage 11a is closed by the closing member _11f , and the air passage in the tank truck 1 is When the oil type is gasoline, only the on-off valve So ₁ is opened and the air signal is sent from the control box 5 only to the air passage 12a of the connector 6B, and when the oil type is kerosene, the on-off valve So 1 is opened.
Open only So ₂ to send an air signal only to air passage 12b, connect air buzzer 13 to air passage 12d, and send a buzzer test air signal to air passage 12c via on-off valve So ₃ . .

In this embodiment, when the connectors 6A and 6B are connected, if the type of oil in the tank truck 1 is gasoline, an air signal is applied from the control box 5 to the air passage 12a of the connector 6B; Since the air passage 11a of the connector 6A is closed by the closing member 11f, no air signal is applied to the buzzer 13 and the buzzer 13 does not sound, indicating that the oil types match.

In addition, when the type of oil in the tank truck 1 is kerosene, an air signal is applied to the air passage 12b of the connector 6B, and the air signal is applied to the air passage 11b, 11 of the connector 6A.
It is transmitted to the air buzzer 13 through the air passage 12d of the connector 6B, and the buzzer 13 sounds, so it can be confirmed that the oil types do not match.

Open on-off valve So ₃ and send air signal to connector 6B
If it is added to the air passage 12c, the buzzer 13 will sound, so it can be confirmed that the buzzer 13 is operating normally.

As described above, the apparatus of the present invention has the great advantage of being able to prevent oil mixture during unloading from a lorry due to its extremely simple configuration. Of course, a buzzer may sound when the oil types match.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the apparatus of the present invention, FIG. 2 is an explanatory diagram of its specific gravity measuring mechanism, and FIG. 3 is an explanatory diagram of its connector. 1...Tank truck, 2...Refueling port, 3...
Oil supply pipe, 4... Specific gravity measuring mechanism, 5... Control box, 6A, 6B... Connector, 7... Tank, 8...
...Valve, 9...Line, 10...Air vent, 1
1a to 11e...Air passage, 11f...Closing member, 12a to 12d...Air passage, So ₁ to _{So 3} ...
...Opening/closing valve, 13...Air buzzer, E, F, G...
...Float, e, f, g...Reed switch.

Claims (1)

[Claims] 1. A specific gravity measuring mechanism for determining the oil type based on the specific gravity of the unloading oil, one connector that receives a signal according to the oil type in the oil storage tank, and a connector connected to this one connector and connected to the specific gravity measuring mechanism. The other connector receives a signal corresponding to the determined oil type, and the determining mechanism determines whether the signals received by the two connectors match or do not match, and the determining mechanism is actuated by the fluid to determine the determined result. The specific gravity measuring mechanism includes a tank into which unloading oil is introduced, and a plurality of units having a specific gravity difference corresponding to the specific gravity difference of the oil species to be measured, which are arranged vertically movably in this tank. A float, a reed switch provided corresponding to the floating position of the plurality of floats and opened and closed by the floating of the float, and an oil type determined by opening and closing of this reed switch, and a reed switch corresponding to this oil type. a control box that allows fluid to flow only through the fluid passages, and the other connector is controlled by the control box and includes a plurality of fluid passages into which fluid is selectively introduced, and a judgment fluid that communicates with the match/mismatch judgment mechanism. passages, and when said one connector is connected to said other connector, one end thereof is in communication with each fluid passage of said other connector, and the other ends thereof are in communication with each other by a communication fluid passage. 1. An oil mixture prevention device comprising: a plurality of fluid passages; and a closing member for closing any of the fluid passages.