JPH0684199B2 - Oil mixture prevention device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an oil mixing prevention device when a tank truck unloads gasoline, light oil, or the like from an oil storage tank of a gas station.

[Prior Art] At this time, if the type of oil in the hatch of the tank truck does not match the type of oil in the oil-filled tank, mixed oil occurs. In order to prevent this, conventionally, a key was provided in each of the tank oil filling port and the hatch, and when the keys were matched, it was possible to connect the oil filling port to the tank hose oil filling hose and to open the hatch bottom valve.

In such a conventional method, since each lubrication port is provided with a separate key, it is troublesome to store and manage the keys, and it is troublesome and time-consuming to search for a specific key among a plurality of keys. is there.

Various techniques are generally known to prevent mixing of oil when refueling an oil storage tank from a tank truck.
-193998, JP-A-62-16391, JP-A-60-2
Japanese Patent Laid-Open No. 59-93699 discloses a device for preventing mixing of discharged fluids in a multi-chamber tank. However, these known techniques require a key and a switch, and it takes time and labor, or even if an optical sensor is used, the relationship with the bottom valve is insufficient, and neither can detect the oil type in the tank truck. I was not satisfied.

[Problems to be solved] Therefore, an object of the present invention is not the office of a gas station,
You can judge whether the oil type is correct in the tank truck,
Moreover, it is an object of the present invention to provide an oil mixing prevention device that does not require labor and time-consuming work such as storing keys.

[Means for Solving the Problem] According to the present invention, in the oil mixing prevention device for preventing oil mixing when the tank truck unloads oil from the oil storage tank of the gas station, each tank H is provided in each hatch H of the tank truck R. Couplings 7a, 7b to the outflow pipe 6 connected via the bottom valve 4
Is connected via an oil supply hose 8 and a bottom valve sensor 5 for detecting the opening / closing of the bottom valve 4 is provided. The oil supply hose 8 is connected to the oil supply pipe 1 of the oil storage tank T and the couplings 2 and 9. Connected and coupling on the side of the outflow pipe 6
Between the transmission side coupler 22 provided in 7b and the detection side coupler 18 provided in the coupling 9 of the oiling pipe 1, the detection bodies 16, 16A are provided.
Is further provided, and holes 3A having different depths are bored in the oil type identification pieces 3 provided in the coupling 2 of the oil injection pipe 1, and the detection bodies 16 and 16A are Hole 3A
And a transmission part 21 for transmitting the detected depth of the hole 3A, and further engaged with the socket 27 of the converter 26 provided in the coupling 7a of the Lori R.
21 coupler 22 and rod operated by the depth of the hole 3A
23, and the socket 27 has a plurality of sets of light emitting diodes D and phototransistors E, and is further provided in the tank truck K and is provided with a control device 30 to which signals from the converter 26 and the bottom valve sensor 5 are input. Is a cargo data storage means 31 for storing the oil type of each hatch H, and an oil type determination means 32 for comparing the oil type signal from the converter 26 with the oil type stored in the cargo data storage means 31. A bottom valve opening / closing judging means 33 for judging opening / closing of the bottom valve 4 based on a signal from the bottom valve sensor 5 is provided, and an alarm 34 is provided which is activated when the oil kind judging means 32 judges an oil kind mismatch. is there.

[Explanation of Operation and Effect] Therefore, the operator of the tank truck R connects the coupling 7b of the oil supply hose 8 to the coupling 7a of the tank truck R, the coupling 9 to the coupling 2a, and the coupler 22 when lubricating. Is connected to the socket 27, and the coupler 18 is connected to the oil type identification piece 3. Then, the rod 20 enters the hole 3A, moves according to the depth of the hole, and displaces the other rod 23. The converter 26 reads the displacement of the rod 23 and converts it into an electric oil type signal of an ON / OFF received light signal and outputs it. Then, when the opening / closing handle 13 is rotated to open the bottom valve 4a, the bottom valve sensor 5a outputs a hatch bottom valve opening signal. The oil type determination means 32 of the control device 30 selects the oil type of the hatch from the hatch bottom valve open signal and the cargo data stored in the storage means 31, and compares the oil type signal from the converter 26, It is judged whether the oil type of the tank to be lubricated matches the oil type of the hatch, and if it matches, it is left as it is. If it does not match, the operation signal is output when the bottom valve 4 is opened. Alarm
Activate 34 to notify.

Therefore, according to the present invention, it is sufficient to provide the oil type identification piece 3 on the gas filling station side, and all judgment work is performed on the lorry side. Does not occur.

Further, since the depth of the hole 3A is converted into an electric signal by the converter 26 on the side of the lory R, no electric wire is required for the detection body, and the structure is simplified.

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

In FIG. 1, oil storage tanks T1 to T3 (hereinafter, the symbol T is used when generically referred to) are buried in the site A of the gas station, and oil filling pipes 1a to 1c (hereinafter, symbol 1 is used when generically referred to) are provided above the ground. Are linked to. Then, for example, the tank T1 stores high-octane gasoline, the tank T2 stores regular gasoline, and the tank T3 stores light oil.

A coupling 2a or
2c (hereinafter referred to as reference numeral 2 when collectively referred to) is provided,
Each coupling 2 has an oil type identification piece 3a or
3c (hereinafter, referred to as reference numeral 3 when collectively referred to) is provided.

On the other hand, the tank truck R is provided with hatches H1 to H3 (the reference numeral H is used in the following description). For example, the hatch H1 is loaded with high-octane gasoline, the hatch H2 is loaded with regular gasoline, and the hatch H3 is loaded with light oil. There is. Each of these hatches H has a bottom valve 4a to 4c (hereinafter, reference numeral 4 will be used) and bottom valve sensors 5a to 5c (hereinafter, generally referred to as reference numeral 5) for detecting opening / closing of the bottom valve 4. Is provided. The outlet side of these bottom valves 4c is communicated with the outflow pipe 6, and an oiling hose 8 is connected to the end portion of the outflow pipe 6 via couplings 7a and 7b. A coupling 9 is provided which connects to the oil coupling 2.

Further, a control device 30 is provided in the cab of the Lori R,
The control device 30 stores the cargo data, that is, the oil type of each hatch H. An alarm device 34 is provided on the roof.

In FIG. 2 and FIG. 3, the bottom valve 4 is fixed to a valve rod 12 having a male screw 12a screwed into a female screw 11 attached to the bottom of the hatch H via a bracket 10, and the valve rod 12 is fixed to the valve rod 12. Reference numeral 12 is supported on the upper portion of the hatch H, and an opening / closing handle 13 is attached to the upper end.

The bottom valve sensor 5 is composed of a pair of magnetic sensors A and B, and
A magnet C having a width approximately equal to the total horizontal width of the sensors A and B and having a height slightly higher than the maximum lift of the bottom valve 4 faces the sensors A and B by brackets 14 and 14 and bolts 15 and 15. Installed. Then, as shown in FIG. 3, the valve rod 12 is rotated counterclockwise from the fully closed position D (indicated by an arrow in FIG. 4).
When the valve is turned to open to open the valve, the sensors A and B sequentially approach each other and detect the magnet C moving away from each other to emit pulse signals a and b. Therefore, the signals a and b overlap at the median position (FIG. 3) of the sensors A and B and the magnet C, and the valve opening / closing determining means 33 of the control device 30 adds or subtracts the number of pulse signals a and b. Bottom valve 4 counting to the side
It is designed to be able to detect when the is closed and opened. The combination of the magnetic sensors A and B and the magnet C is not limited to this, and a combination of a micro switch and a convex piece or a high frequency sensor and a slit plate is used.
Any sensor may be used as long as it has a state in which individual sensors are simultaneously detecting. Further, when the median positions of the sensors A and B and the magnet C at the time of fully closed are out of order, the bolts 15 and 15 can be loosened and adjusted.

In FIG. 1 and FIG. 5, a detector indicated by reference numeral 16 is provided along the lubrication hose 8. The detector 16 may be provided separately instead of along the lubrication hose 8.

The oil type identification piece 3 is provided with holes 3A having different depths,
The depth of the hole 3A indicates the type of oil in the coupling 2, that is, the tank T.

The detection body 16 is roughly composed of a detection unit 17 that detects the depth of the hole 3A of the oil type identification piece 3 and a transmission unit 21 that transmits the detected depth of the hole 3A.

The detection unit 17 engages with the outer shape of the oil type identification piece 3 and has a flange portion.
It consists of a detection side coupler 18 that is locked by 3B and a rod 20 that is housed in the coupler 18 and is urged outward by a spring 19 and the protrusion length is determined by the flange portion 20a and that engages with the hole 3A. The detection unit 17 and the oil type identification piece 3 constitute a mechanical oil type detection means.

The transmission unit 21 includes a detection side coupler 18, a transmission side coupler 22 similar to the rod 20, a rod 23, a flexible wire 24 fixed to the flange portions 23a, 20a, and a protective tube 25 covering the wire 24. Has become. And couplers 18, 22
Are integrally formed with the coupling 9 and the coupling 7b, respectively.

On the other hand, the coupling 7a of the lorry R is provided with a converter indicated by reference numeral 26 in its entirety, and the converter 26 and the transmission unit 21 constitute a conversion means. The converter 26 includes a socket 27 whose inner hole 26a engages with the transmission side coupler 22 and a plurality of sets (four sets in the illustrated example) that are provided side by side in the axial direction of the inner hole 26a.
Light emitting diode D and phototransistor E, and signal lines 28 and 29 connecting the diode D and the transistor E to the control device 30, respectively.

Therefore, when the coupler 22 is connected to the socket 27 and the coupler 18 is connected to the oil type identification piece 3, the rod 20 moves to the right according to the depth of the hole 3A, and the rod 23 is projected. Then, the set of the diode D and the transistor E is blocked by the rod 23, and an ON / OFF received light signal, that is, an oil type signal is transmitted from the diode D to the control device 30 via the signal line 29.

FIG. 6 shows another embodiment of the detector 16A.
Is provided with four detectors 16a to 16d, which are substantially equal to the detector 16 shown in FIG. 5, arranged in parallel, and emits ON / OFF light receiving signals according to the position of the hole 3A of the oil type identification piece 3. It is supposed to do.

In FIG. 7, the control device 30 is composed of a microcomputer, and has a storage means 31 for storing cargo data, that is, oil type for each hatch, a valve opening signal of the bottom valve sensor 5, and a converter.
The oil type signal from 26 and the cargo data stored in the storage means 31 are compared to determine whether or not the oil types match, and the oil type determination means for activating the alarm device 34 when they do not match.
32 and a bottom valve open / close judging means 33 for judging the opening / closing of the bottom valve 4 by counting the numbers of the pulse signals a and b from the bottom valve sensor 5 on the plus and minus sides.

Therefore, at the time of lubrication, the coupling 7b of the lubrication hose 8 is connected to the coupling 7a of the truck R, the coupling 9 is connected to the coupling 2a, the coupler 22 is connected to the socket 27, and the coupler 18 is an oil type identification piece. When connected to the rod 3, the rod 20 enters the hole 3A and moves according to the depth of the hole, and the other rod 23
To displace. The transducer 26 reads the displacement of the rod 23 and
Converts the N, OFF received light signal to an electrical oil type signal and outputs it. Then, when the opening / closing handle 13 is rotated to open the bottom valve 4a, the magnetic sensors A and B of the bottom valve sensor 5a are approached by the rotation of the valve rod 12 and sense the moving away magnet C to detect a pulse signal, Outputs the hatch bottom valve open signal. The oil type determination means 32 of the control device 30 selects the oil type of the hatch from the hatch bottom valve open signal and the cargo data stored in the storage means 31, and compares the oil type signal from the converter 26, Judge whether the oil types in tank T1 and hatch H1 match, and if they match (match in the case shown), leave them as they are. If they do not match, open bottom valve 4b, for example. In the event of a malfunction, an operation signal is output and the alarm device 34 is activated to notify it to prevent oil mixture.

[Effects of the Invention] As described above, the present invention has the following excellent effects.

(I) The oil type can be identified on the tank truck side simply by mounting the oil type identification pieces on the couplings of the oil supply pipes on the gas station side.

(Ii) Oil workers will not mix oil even if they do nothing.

(Iii) No electric wire is required for the detector, and the structure is simple.

(Iv) It suffices to connect the detector with the oil supply hose, which simplifies the work and improves the oil supply efficiency.

[Brief description of drawings]

FIG. 1 is a side view showing a tank truck equipped with an oil mixing prevention device embodying the present invention and a gas station, FIG. 2 is a side sectional view showing a bottom valve and a portion around a bottom valve sensor, and FIG. FIG. 4 is a sectional view showing the operation of the bottom valve sensor, FIG. 5 is a side sectional view showing the detecting body, and FIG. 6 is a side sectional view showing another embodiment of the detecting body. 7 and 8 are control block diagrams of the control device. 3 ... Oil type identification piece, 3A ... Hole, 16, 16A ... Detector, 1
8, 22 …… Coupler, 20,23 …… Rod, 24 …… Flexible wire, 26 …… Transducer, D …… Light emitting diode, E
...... Phototransistor

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takashi Suzuki 2-12-13 Shibaura, Minato-ku, Tokyo Tatsuno Co., Ltd. (72) Inventor Hisaya Kuroda 2-12-13 Shibaura, Minato-ku, Tokyo Tokyo Tatsunouchi (56) Reference JP 62-193998 (JP, A) JP 62-16391 (JP, A) JP 60-23196 (JP, A) JP 59-93699 (JP, A)

Claims (1)

[Claims] 1. A bottom valve (4) provided in each hatch (H) of a tank lorry (R) in an oil mixing prevention device for preventing oil mixing when the tank lorry unloads oil from an oil storage tank of a gas station. ) Is connected to the outflow pipe (6) via the couplings (7a, 7b), and the lubrication hoses (8) are connected to the bottom valves (4) of the bottom valve sensors (5). ) Is provided, the oil supply hose (8) is connected to the oil supply pipe (1) of the oil storage tank (T) via couplings (2, 9), and the coupling (6) on the outflow pipe (6) side is provided. 7b) the transmission side coupler (22) and the oiling pipe (1)
The detection body (16, 16A) is provided between the detection side coupler (18) provided on the coupling (9) and the oil type identification piece provided on the coupling (2) of the oil supply pipe (1). (3)
There are holes (3A) with different depths in each,
The detection body (16, 16A) is a hole (3) of the oil type identification piece (3).
Detection section (17) for detecting the depth of A) and the detected hole (3A)
(26) which is composed of a transmission part (21) for transmitting the depth of the electric field and is further provided on the coupling (7a) of the Lori (R).
The coupler (2) of the transmission part (21) that engages with the socket (27) of
2) and the rod (2 operated by the depth of the hole (3A)
3), the socket (27) has a plurality of sets of light emitting diodes (D) and a phototransistor (E), and the converter (26) and the bottom valve sensor are provided in a tank truck (K). The control device (30) to which the signal from (5) is input is a cargo data storage means (31) for storing the oil type of each hatch (H), and the oil type signal from the converter (26) and the cargo. An oil type determination means (32) for comparing the oil type stored in the data storage means (31) and a bottom valve open / close determination means for determining the opening / closing of the bottom valve (4) based on a signal from the bottom valve sensor (5). (33)
And an alarm device (34) that is activated when the oil type determination means (32) determines that the oil types do not match.