JP2612022B2 - Oil mixture prevention device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for preventing oil mixture when a tank lorry unloads gasoline, light oil, or the like into an oil storage tank of a gas station.

[Prior Art] At this time, if the oil type in the hatch of the tank lorry does not match the oil in the oil tank, oil mixture occurs. Conventionally, to prevent this, a key has been provided for each of the lubrication port and the hatch of the tank, and when the keys match, the lubrication port and the lubrication hose of the tank lorry can be connected, and the bottom valve of the hatch can be opened.

JP-A-60-251094 discloses that the oil type of the cargo of a tank lorry is detected by the reflected light amount, the oil type of the oil storage tank is detected by the reflected light amount or the transmitted light amount, and an alarm is issued when the oil types do not match. Techniques are disclosed.

However, in such a known technique, the connection has to be changed for each underground tank for refueling the optical cable, and the refueling operation is troublesome.

In addition, according to the prior art, since each lubrication port is provided with a separate key, storage and management of keys are troublesome, and it takes time and effort to search for a specific key among a plurality of keys. There is.

[Problems to be Solved by the Invention] Accordingly, an object of the present invention is to provide an oil mixture prevention device that can easily perform unloading work from a tank lorry and that can reliably prevent oil mixture. It is in.

[Means for Solving the Problems] According to the present invention, in a device for preventing oil mixing when a tank lorry unloads oil into an oil storage tank of a gas station, a coupling of an oiling hose of the tank lorry is connected to the oil station. A switch for closing and outputting an oil type signal is provided for each lubrication port of each oil storage tank, and a connector for collecting signal lines from the switches is provided. A bottom valve sensor for detecting opening and closing of the bottom valve is provided on the tank lorry. Is provided for each hatch, and a control device for inputting an opening / closing signal from the bottom valve sensor and an oil type signal from each switch input through the connector and outputting an operation signal to an alarm is provided. The control device is configured to store the oil type for each hatch of the tank lorry in a load data storage unit, a hatch number signal from the bottom valve sensor and a load data storage unit. Oil type judging means for judging the type of oil to be unloaded and the oil type to be unloaded, and outputting an operation signal to the alarm when the oil type does not match the oil type signal input via the connector. Is provided.

[Explanation of Operation and Effect] In the present invention, if the control device of the tank lorry is connected to the connector, the connection to all the oil storage tanks is completed only by the work. Then, when the coupling of the lubrication hose of the tank lorry is connected to the lubrication port of the oil storage tank, the switch automatically closes and an oil type signal is issued, and when the bottom valve is opened, the oil type signal of the hatch and the above-mentioned switch are used. If the signals do not match, an alarm is issued.

Therefore, in the present invention, the connection work of the individual signal wirings on the tank lorry or the oil storage tank side as in the related art is not required, and the refueling work is facilitated, and the work efficiency is improved.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, an oil storage tank T1 is located on a site A of a gas station.
T2 ... (hereinafter, the symbol T is used when generically called) is buried, and lubrication pipes 1a, 1b ... (hereinafter, generically, symbol 1 is used).
Is used to communicate with the ground. For example, the tank T1 stores high-octane gasoline, the tank T2 stores regular gasoline, and the tank T3 stores light oil.

The tip of the lubrication pipe 1 is connected to a coupling 2a, 2b, respectively.
.. (Hereinafter, collectively referred to by reference numeral 2) are provided, and switches 3a, 3b, and 3c, which are sensors, are respectively provided to the couplings 2 (hereinafter, referred to as 3).
Is provided.

On the other hand, the tank lorry R is provided with hatches H1 to H3 (hereinafter, the symbol H will be used in the collective term). I have.
These hatches H are provided with bottom valves 4a to 4c, respectively, and bottom valve sensors 5a to 5c (hereinafter, generally denoted by reference numeral 5) for detecting opening and closing of the bottom valves. The outlet side of these bottom valves is connected to an oiling hose 7 through a pipe 6,
A coupling 8 connected to the coupling 2 is provided at the tip of the lubrication hose 7, and an operating piece 9 of the switch 3 is attached to the coupling 8. Further, a control device 10 is provided in the cab of the lorry R, and the control device 10 stores the load data, that is, the oil type of each hatch H. An alarm 14 is provided on the roof.

One contact of the switch 3 is a line L11 of high-octane gasoline, a line L2 of regular gasoline, and a line L of light oil, respectively.
3 and the other contacts are all connected to line L4, which is grounded. Therefore, by the conduction of the switch 3, the oil type of the coupling 2, that is, the oil of the tank T can be identified. These lines L1 to L4 are connected to a connector 16 provided on a stand 15. The connector 17 connected to this connector 16 has a signal cable 18
Are connected, and the signal cable 18 is similarly connected to the lines L1 to L4.
, And is connected to a connector 19 connected to the control device 10, and the line L4 is connected to a lorry.

In FIG. 3, a control device 10 is constituted by a microcomputer, and has storage means 11 for storing cargo data, that is, an oil type for each hatch H, a valve opening signal of the bottom valve sensor 5, an oil type signal from the switch 3, and Oil type determining means for comparing the cargo data stored in the storage means 11 to determine whether or not the liquid types match, and operating the alarm 14 when the liquid types do not match.
With 12.

Therefore, upon lubrication, when the connector 17 is connected to the connector 16 and the coupling 8 is connected to, for example, the coupling 2a, the switch 3a is pressed by the operating piece 9 and the oil type signal is transmitted via the line L1 to the controller 10. To enter. And the bottom valve 4a
Is opened, the bottom valve sensor 5a outputs the number of the hatch H1.
The oil type determination means 12 of the control device 10 selects the oil type of the hatch from the hatch number from the bottom valve sensor 5a and the cargo data stored in the storage means 11, and outputs the oil type signal indicated by the switch 3a. If the oil types match (in the case shown, they match), they are left as they are, and if they do not match (for example, when the bottom valve 4b is opened), an operation signal is output and the alarm 14 is activated to notify the operator to prevent oil mixture.

Although the signal input via the signal line has been described as the oil type signal, the control signal 10 may be used as the tank number signal by storing the relationship between the tank number and the oil type.

[Effects of the Invention] As described above, according to the present invention, the following excellent effects can be obtained.

(I) Connect the tank lorry controller to the connector,
It is only necessary to connect the coupling of the lubrication hose to the lubrication port of the oil storage tank, and it is not necessary to connect the signal wiring for each oil storage tank.

(Ii) Since the oil type mismatch is warned by opening and closing the bottom valve, if a warning is issued, the bottom valve may be closed and oil mixture can be reliably prevented.

(Iii) The work efficiency when unloading from the tank truck is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a tank lorry and a gas station provided with an oil mixture prevention device embodying the present invention, FIG. 2 is a circuit diagram showing lines and switches, and FIG. 3 is a control block diagram. T ... underground tank, L4 ... grounded wire, 2 ... coupling, 3 ... switch, 8 ... coupling, 10 ...
... Control device, 11 ... Load data storage means, 12 ... Oil type judgment means, 18 ... Signal cable

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Takashi Suzuki, Inventor 2-12-13, Shibaura, Minato-ku, Tokyo Tokyo Tatsuno Corporation (72) Inventor Hisaya Kuroda 2-12-13, Shibaura, Minato-ku, Tokyo Stock Company Tatsunouchi, Tokyo (56) References JP-A-60-251094 (JP, A) JP-A-61-142191 (JP, A)

Claims (1)

(57) [Claims] In an oil mixing prevention device when a tank lorry unloads oil to an oil storage tank at a gas station, an oil type signal is output when the coupling of a lubrication hose of the tank lorry is connected to the oil station. A switch is provided for each lubrication port of each oil storage tank, a connector that collects signal lines from the switches is provided, and a tank valve is provided with a bottom valve sensor for detecting opening and closing of a bottom valve for each hatch. A control device is provided for inputting an opening / closing signal from a bottom valve sensor and an oil type signal from each switch input via the connector and outputting an operation signal to an alarm. The control device is provided for each hatch of the tank lorry. And the load data stored in the load data storage means and the hatch number signal from the bottom valve sensor and the load data stored in the load data storage means. Oil type judging means for judging the type and outputting an operation signal to the alarm when the oil type does not match the oil type signal input via the connector. Oil mixture prevention device.