JPH0298596A - Mixed oil prevention device - Google Patents

Abstract

PURPOSE:To obtain an oil mixing preventive device with a simple structure, by which the connection of a signal wire to transmit a signal with an oil storage tank side and lorry side is easy by providing the device with an electrical discriminating part at the oil filling port of an oil stage tank, and providing a signal wire in a hose, which is connected to the discriminating part. CONSTITUTION:When couplings 9, 11 on both ends of a hose 8 are connected to couplings 2, 7 on an oil storage tank side and a lorry side, one end of a signal wire 14 is connected to a resistance body 15 through a connector 3, and a discriminating signal, which is shown by a resistance value, is transmitted to a control device 40 through a connector which is connected to the other end. When a bottom valve 4 is opened, the control device decides whether oil types agree or not by comparing the valve opening signal of a bottom valve sensor 5, the discriminating signal and a load data. When the oil types agree, an electro-magnetic clutch 31 is excited to make a main valve 24 openable, and an oil supply becomes possible. When the oil types do not agree, the main valve is made un-openable without exciting the electro-magnetic clutch 31, and an oil mixing is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a device for preventing oil mixture when a tank truck unloads gas oil, etc. into an oil storage tank at a gas station.

[Prior Art] In such a case, if the type of oil in the hatch of the tank truck and the type of oil in the tank to be oiled do not match, mixed oil will occur. To prevent this, conventionally, keys were provided on the oil filler port of the tank and the hatch, respectively, and when the keys matched, it was possible to connect the oil filler port with the oil filler hose of the tank truck, and between the bottom valve of the hatch.

In this conventional method, each oil filler port is provided with a separate key, so storing and managing the keys is troublesome, and it takes time and effort to search for a specific key among multiple keys. There is an inconvenience.

Therefore, in Japanese Patent Application No. 1983-51683, the present applicant determined the oil type based on the oil type signal indicating low antibody provided in the tank to be refueled, the valve open signal of the bottom valve sensor of the hatch of the tank truck, and the cargo data. We have proposed an oil mixture prevention device that eliminates the above-mentioned inconvenience and prevents oil mixture by providing a control device for comparison and an alarm that issues an alarm when the oil types do not match.

[Problem to be solved by the invention] The above proposal itself is effective, but the connector that connects the low antibody provided in the tank to be refueled and the signal line that transmits the value of the low antibody is a coupling problem. Since the coupling is attached to the side of the
It is difficult to connect, and it is time-consuming and troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide an oil mixture prevention device with a simple structure that facilitates connection between a signal line for transmitting a signal and an oil storage tank side and a lower side.

[Means for Solving the Problems] According to the present invention, an electrical identification portion is provided at the oil filling port of the oil storage tank, and a signal line connected to the identification portion is provided in the hose.

Preferably, the electrical identification portion is composed of a low antibody.

The above signal line is installed on the center axis of the hose, and the connector to which this signal line is connected is installed on the center axis of the tank side and low side couplings.A ground wire is buried in the hose, and one end of the resistor is grounded. Preferably, it is configured so that it can be connected to a wire.

Further, it is preferable to provide a bottom valve sensor that detects the opening and closing of the bottom valve, and an electromagnetic clutch that is connected when energized to open the main valve provided in the low side coupling and closed when demagnetized.

Furthermore, a control device is provided, and the control device is composed of a microcomputer and is installed in the operator's cab of the tank truck. Will there be an oil type determination unit that compares the sensor's valve opening signal, the identification signal from the resistor, and the cargo data to determine whether or not the oil type matches, and energizes the electromagnetic clutch when they match? Good J.

For the identification signal, either input the signal itself into the microcomputer as an oil type signal, or input the signal itself as a tank number by having the microcomputer have a table of tank numbers and oil types, and convert it into an oil type signal within the microcomputer. May be converted.

[Function] In the oil mixture prevention device configured as above, when the couplings at both ends of the hose are connected to the couplings on the oil storage tank side 1 and the lorry side, one end of the signal line is connected to the resistor through the connector. and transmits an identification signal indicated by a resistance value to a control device via a connector connected to the other end. Then, when the bottom valve is opened, the control device compares the bottom valve sensor's valve opening No. 18, the identification signal, and the cargo data to determine whether the oil types match, and if they match, the electromagnetic clutch is energized to enable the main valve to open for oil supply, and if they do not match, it is not energized and the main valve cannot be opened to prevent oil mixture.

[Example code] The present invention will be described in detail below with reference to the drawings.

In Figure 1, there is a fuel storage tank 1゛1 on site A of the gas station.
to 1゛3 (hereinafter, the code 1゛ is used when referring to them collectively)
are buried, and the oil supply pipes 1a to 1. c (hereinafter, the reference numeral 1 will be used when collectively referring to it) communicates with the ground. For example, tank 1'1 stores high-octane gasoline, tank T2 stores regular gasoline, and tank 'I'3 stores diesel oil.

Couplings 2a to 2c (hereinafter referred to generically as 2) are provided at the tips of the oil supply pipe 1, respectively, and each of the couplings 2 is provided with a connector 3, which will be described later.

On the other hand, the tank truck R is provided with hatches H1 to H3 (hereinafter, the symbol = H is used when generically referred to). For example, hatch H1 is loaded with high-octane gasoline, hatch H2 is loaded with regular gasoline, and hatch H3 is loaded with light oil. ing. Each of these hatches H has an opening/closing handle 3.
Bottom valves 4a to 4c (hereinafter collectively referred to as reference numeral 4 will be used) that are opened and closed at 7 and bottom valve sensors 5a to 5C (hereinafter collectively referred to as 5 will be used) that detect the opening and closing of the bottom valves 4 are provided. It is being The outlet sides of these bottom valves 4 are communicated with an outflow pipe 6, and a lubricating hose 8 is connected to the end of this outflow pipe 6 via a valve body 19 coupling 7.11. , a coupling 9 connected to the coupling 2 is provided.

Further, a control device 40 is provided in the driving cabin of the lorry R, and the control device ff40 stores cargo data, that is, the oil type of each hatch H.

In FIG. 2, the coupling 2.9 is formed of a conductive material and is provided with a stopper 2A and a locking pawl 9A, respectively, which automatically lock the coupling 2 when the coupling 9 is inserted into the coupling 2.

The connector 3 is formed into a cylindrical shape from a conductive material and is supported by an arm 10 on the central axis of the coupling 2 via an insulating cylinder 3A. Further, a chamber 2B is formed in the coupling 2, and a resistor 15 having a resistance value that varies depending on the type of oil is housed in the chamber 2B. One end of this resistor 15 is connected to the connector 3, and the other end is connected to the coupler 2.

On the other hand, a signal line 14 covered with a flexible protective tube 13 is provided on the central axis of the oil supply hose 8 through an arm 12. Moreover, inside the hose 8,
A ground wire 22 is embedded along the hose 8, and both ends are connected to the cup link 9.11.

In FIG. 3, a coupling 7.11 is made of a conductive material, and a valve body 19 having a coupling tough is formed with a passage 16 that is bent twice at right angles and opens in opposite directions. The opening 16a is connected to the outflow pipe 6, and the cup link 11 is connected to a coupling tuff formed in the other opening 16b.

On the central axis on the side of the opening 16b, the connector 20 is supported by the boss portion ]7 via the insulating cylinder 20A.

A signal line 21 connected to a control device 40 is connected to this connector 20 side.

On the other hand, on the opening 16a side, there is a main valve 24 seated on the valve seat 19.
is provided and urged by a return spring 25. The tip of the arm 26 is brought into contact with the tip of the valve rod 242L of the main valve 24, and the arm 26 is fixed to a valve operating column 27 that is pivotally supported by the valve body 19.

In FIG. 4, the valve operating column 27 is rotatably supported by a boss portion 17c and a sleeve 29 that is rotatably pushed through the cover 28. As shown in FIG. This valve operating column 27 has a disk 30
The disk 30 and the flange portion 29a formed on the sleeve 29 constitute an electromagnetic clutch 31.

A valve opening/closing handle 32 is provided at the outer end of the sleeve 29.
A boss portion 32a is fixedly installed, and a torsion spring type return spring 33 is installed between the handle 32 and the cover 28.
is interposed. An elongated hole 32b is formed at the end of the handle 32, and the elongated hole 32b is formed in the end of the handle 32.
One end is pushed through a through hole 32d formed in the protrusion 32C, and the other end of the blank-shaped lever 34 is pushed through. This lever 34 is biased toward the sleeve 29 side by a spring 35 interposed between the protrusion 32 and the through hole 32d.
The end protruding from the through hole 28 formed in the cover 28
It is inserted into a. Although not shown, cover 2
8, another through hole is formed at a position 90° in the direction 51 when viewed from the right side of the drawing with respect to the through hole 28a. Further, a transparent plate 36 is provided on the boss portion 32a of the handle 32, and a stamped line 27a is engraved on a portion of the valve operating column 27 opposite to the transparent plate 36 for visually checking the open/closed state of the illustrated main valve 24. It is set up.

In FIG. 5, the control device 40 is composed of a microcomputer, and includes a memory device FU41 that stores cargo data, that is, the type of oil for each hatch, a valve opening signal from the bottom valve sensor 5, and an identification signal from the resistor 15. An oil type disconnection means 42 which compares the signal with the cargo data stored in the storage means 41 to determine whether or not the oil types match, and energizes the electromagnetic clutch 31 when they match, and a bottom valve. Bottom valve opening/closing determination means/13 for determining opening/closing of the bottom valve 4 based on the information from the sensor 5
and is provided.

Therefore, the coupling 11 is connected to the coupling tough,
When the coupling 9 is connected to the coupling 2a, for example, both ends of the signal line 14 are connected to the connector 3.20, and the identification information of the resistor 15 is transmitted to the control device 40 via the signal lines 14 and 21. . When the bottom valve 4a is opened by turning the opening/closing handle 37, the bottom valve sensor 5a outputs a hatch bottom valve opening signal. The oil type determination means 42 of the control device 40 reads out the oil type of the hatch based on the hatch bottom valve opening signal and the cargo data stored in the first storage stage 42, and compares it with the identification signal from the resistor 15. It is determined whether the oil types in tank 1-1 and hatch H1 match or not. If they match (in the case of ~l, they match), the electromagnetic clutch 31 is energized to confirm that they match. If not, electromagnetic clutch 3
1 is not excited.

Next, when the lever 34 is pulled down and the valve opening/closing handle 32 is rotated 90° clockwise, the electromagnetic clutch 31
Since the sleeve 29 is connected to the disk 30 by the excitation, the valve actuator 27 rotates, and the arm 26 is rotated clockwise to move the valve rod 24a to the right, opening the main valve 24 and supplying oil. be exposed.

At this time, the end of the lever 34 is engaged with the through hole 28a and another through hole to hold the valve opening/closing handle 32 at the refueling position.

When lubrication is finished, pull the lever 34 and return the valve opening/closing handle 32 to close the main valve 24 and close the coupling 15.
17 or 9.2, the rod 20 is returned to the position shown in the figure by the return spring 21.

[Effects of the Invention] Since the present invention is configured as explained below, all that is required is to connect the coupling of the oil supply hose to the oil supply port and the coupling on the lorry side, and connect the signal line to the oil storage tank side on the surface. It can be connected to the low side.

In addition, since the signal line is placed on the central axis of the oiling hose,
There is no directionality when connecting the lubrication hose, making the connection even easier.

In addition, since it is composed of a resistor, a connector, and a signal line,
The structure can be extremely simplified.

[Brief explanation of the drawing]

Figure 1 is a side view showing a tank truck and refueling station equipped with an oil mixture prevention device according to the present invention, Figure 2 is a side sectional view showing the area around the oil filler port, and Figure 3 is a side view showing the area around the truck coupling. FIG. 4 is a side sectional view showing the opening/closing mechanism of the main valve, and FIG. 5 is a control block diagram of the control device. 3.20...Connector 2.7.9.11...Coupling 8...Refueling hose 14...Signal line
15...Resistor 40...Control device

Claims (1)

[Claims] 1. An oil mixture prevention device, characterized in that an electrical identification part is provided at the oil filling port of the oil storage tank, and a signal line connected to the identification part is provided in the hose.