JPH0551094A - System for preventing mixing of liquid - Google Patents

Abstract

PURPOSE:To materialize an easy and inexpensive system that can unmistakably prevent mixing of liquid in a liquid feeding operation that supplies the liquid from a tank of a tank truck to a liquid storage tank containing the liquid the same as that stored in the tank of the tank truck. CONSTITUTION:A tank truck 1 is fitted with a card box 5 that holds a tank identification card 6 indicating the kind of liquid contained in a tank 2 of the tank truck. The kind of liquid shown on the tank identification card is detected with a tank identifying sensor 7 while the kind of stored liquid shown on a stored liquid identification card attached to a storage tank 14 is detected with a stored liquid identifying sensor 10 and a discharge valve and an automatic valve are made to open only when the kinds of liquid detected with both of the sensors are proven to be the same. Then feeding of the liquid is made through a liquid feeding line formed of a hose 15 connecting the tank truck 1 with the liquid storage tank 14.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid supply system for supplying a liquid from a tank truck to a liquid storage tank of a service station, and more particularly, to a liquid type loaded in a hatch of a tank truck and a liquid supply tank of a service station in the liquid supply. The present invention relates to a liquid supply system having liquid mixture prevention means for preventing liquids of different liquid types from being supplied and mixed.

[0002]

2. Description of the Related Art A tank truck is equipped with tanks divided into a plurality of hatches having different capacities of 4 kiloliters, 2 kiloliters and 1 kiloliter, respectively.
Normally, the tank contains a different kind of liquid such as regular gasoline, high-octane gasoline, kerosene and light oil for transportation.
These liquid types are unloaded in the underground liquid storage tanks provided for each liquid type at the service station, but since the unloading work is performed artificially, there is a risk of accidentally mixing different liquids. For unloading from the tank truck to the liquid supply tank, connect a connection hose between the discharge valve provided for each hatch of the tank truck and the liquid supply valve provided in the liquid storage tank, and supply via the connection hose. To liquidate. Therefore, if the connecting hoses are differently connected, they will be mixed, and the mixed liquid will be discarded as waste liquid, and there will be a risk of fire.

In order to prevent such a mixed liquid, conventionally, a special coupler specified for each liquid type is attached to the valve openings of the valves on the tank truck and the liquid storage tank side, and the connection hose is erroneously connected. I try not to connect. But,
In this method, the special coupler may be left fixed on the liquid storage tank side of the service station, but on the tank truck vehicle side, the liquid type for each hatch also changes according to the loading specifications, so the special coupler has also changed. It was necessary to re-install according to. This requires a lot of work and is complicated to operate.Moreover, the special coupler is required not only on the tank truck vehicle side and the liquid supply tank side, but also on the connection hose side, resulting in high price and service. Since the economic burden on the station side is very large, there are few examples, and most of them are currently not equipped with a special coupler.

[0004]

[Object] The present invention has been made in view of the above-mentioned problems, and artificially determines a liquid type in a storage tank that stores the same type of liquid from a tank truck that is loaded with liquid types for each hatch. The present invention has been made for the purpose of providing a liquid mixture prevention system which can prevent liquid mixture without fail and is easy to operate and inexpensive.

[0005]

In order to achieve the above object, the present invention provides (1)
A hatch identification card defined corresponding to the type of liquid loaded in the hatch of the tank truck, a card box that stores the hatch identification card according to the arrangement of the hatch and is attached to the tank truck, and the card box A hatch identification sensor that detects the liquid type of the stored hatch identification card, and an automatic valve that connects with a discharge valve provided for each hatch of the tank truck and connects with a connection hose to supply liquid to the storage tank,
A stored liquid identification card that corresponds to the automatic valve and is determined for each liquid type in the liquid storage tank, a stored liquid identification sensor that detects the liquid type that corresponds to the stored liquid identification card, the hatch identification sensor, and the stored liquid identification A detector unit for discriminating the difference of the liquid type from the output of the sensor, and a control circuit for opening the automatic valve only when the discrimination signal of the detector unit is the same liquid type, Further, in (2) and (1), the hatch identification sensor that detects the liquid type corresponding to the hatch identification card and the stored liquid identification sensor that detects the liquid type corresponding to the stored liquid identification card can be used in common. An identification sensor, a detector unit having a storage means for storing the detected liquid type of each of the hatch identification card and the stored liquid identification card, and the hatch identification sensor and the stored liquid identification sensor stored in the detector unit. Liquid type And a control circuit that opens the automatic valve only when they are the same. Further, (3) in (1) and (2), the hatch identification card and the stored liquid identification card correspond to a liquid type. It is a feature that it is a color card defined by. Hereinafter, description will be given based on examples of the present invention.

FIG. 1 is a block diagram for explaining an embodiment of a mixed liquid prevention system according to the present invention. In the figure, 1 is a tank truck, 2a to 2n are hatches, 3a to 3n are oil supply lines, and 4a to 4n. Is a discharge valve, 5 is a card box,
5a and 5b to 5n are identification card storage openings, and 6a and 6b to 6
n is a hatch identification card, 7 is a hatch identification sensor, 7a,
7b to 7n are hatch identification sensor connection parts, 8 and 11 are sensor codes, 9a and 9b to 9k are stored liquid identification cards, 10 is a stored liquid identification sensor, and 12a and 12b to 12k (k <n) are liquid storage lines. 13a, 13b-13k are automatic valves, 14
a, 14b to 14k are liquid storage tanks, 15 is a connection hose,
16 is a detector unit, 16a and 16b are connection parts, 17
Is a control circuit, 18 is a discrimination signal line, 19 is a discharge valve drive signal line, and 20 is an automatic valve drive signal line.

In the figure, a tank lorry vehicle 1 is stopped in an area on the tank lorry vehicle side A. The tank truck 1 is equipped with a tank divided into a plurality of hatches 2a, 2b to 2n, and the number of kinds of liquids according to the specifications is defined by the hatch 2a,
The hatches 2a, 2b-2n loaded from 2b-2n
To the liquid supply lines 3a, 3b to 3n via the discharge valves 4a, 4b to 4n corresponding to the above. Further, a card box 5 is attached to the side portion S of the tank truck 1, and the hatches 2a, 2b.
2n identification card storage opening 5a provided in order,
5b to 5n are provided. The identification card storage port 5a
Is inserted into the hatch 2a, and a hatch identification card 6b representing the liquid type loaded in the hatch 2b is inserted into the hatch identification card storage port 5b. .. Similarly, the hatch identification card 6n loaded in the hatch 2n is inserted into the hatch identification card storage port 5n described below.

Further, the hatch identification sensor connecting portions 7a, 7 are provided at predetermined positions of the hatch identification card storage opening of the card box 5.
b to 7n are provided so that the hatch identification sensor 7 can be arbitrarily attached and detached. The hatch identification sensor 7 is a sensor for detecting a signal indicating the liquid type recorded on the hatch identification cards 6a, 6b to 6n in order to identify the hatch identification cards 6a, 6b to 6n, and the sensor signal is a sensor code 8
Is connected to the connecting portion 16a of the detector unit 16 via.

On the other hand, on the service station side B, the number of liquid storage tanks 14a, 14b, ..., 14k corresponding to the liquid type is provided.
(K <n) is buried underground, and the liquid storage tank 14
a, 14b, ..., 14k have automatic valves 13a, 13b, ..., 1
Liquid storage lines 12a, 12b, to 12k having 3k are opened. Furthermore, each of the liquid storage lines 12a, 12
liquid tanks 14a, 14b, ..., 14k for b, ..., 12k
The stored liquid identification cards 9a, 9b, ..., 9k corresponding to the liquid type stored in are provided. The liquid type information recorded on the stored liquid identification cards 9a, 9b, ..., 9k is
The connection part 16 of the detector unit 16 reads the liquid type signal read by the stored liquid identification sensor 10 via the sensor code 11.
connected to b.

In the configuration of the mixed liquid prevention system described above,
The case where the liquid species loaded in the hatch 2a of the tank truck 1 is unloaded in the liquid storage tank 14a will be described. For example, the gasoline of the hatch 2a is regular gasoline,
First, connect the connection hose 15 to the liquid supply line 3a and the liquid storage line 12.
Connect to a. Next, the hatch identification card 6a representing the regular gasoline is attached to the hatch identification sensor connecting portion 7a of the identification card storage opening 5a in which the identification card 6a is stored.
The hatch identification sensor 7 is connected to. The hatch identification sensor decodes that the hatch identification card 6a is regular gasoline and transmits the sensor output to the detector unit 16.

On the other hand, on the liquid supply line 3a side of the connection hose 15, the stored liquid identification card 9a provided in the regular gasoline storage line 12a is stored in the regular gasoline storage line 12a. Is transmitted and the sensor output is transmitted to the detector unit 16. In the detector unit 16, the hatch identification card 6
It is determined that both the liquid type of a and the liquid type of the stored liquid identification card 9a are regular gasoline, and the determination signal line 18
Output to. The control circuit 17 receives the transmission signal of the discrimination signal line 18, opens the discharge valve 4a for regular gasoline via the discharge valve drive signal line, and simultaneously opens the automatic valve 13a of the liquid storage line 12a for regular gasoline. Open the valve to store the regular gasoline in the hatch 2a in the tank 14
Fill a. If the hatch identification card is 6b indicating high-octane gasoline and the stored liquid identification card is 9a indicating regular gasoline, the determination signal of the detector unit 16 does not open the automatic valve 13a and causes incorrect supply. There is no such thing.

In the above description, the hatch identification sensor 7 and the stored liquid identification sensor 10 are described separately, but the cost can be reduced by using the same identification sensor. In this case, the detector unit 16 includes a hatch identification sensor 7
A storage unit for storing the liquid type signal detected by the liquid type sensor and the liquid type signal detected by the stored liquid identification sensor 10 is provided, and the control circuit 17 operates only when the respective liquid types stored in the storage unit are equal. The automatic valve 13a can be opened.

The hatch identification card has a recording method for indicating the type of liquid, and there are many recording methods. For example, there are those having a magnetic memory for electromagnetic detection and those having a notch corresponding to the liquid type for mechanical reading. But,
These identification memories cannot be judged correctly by human vision. On the other hand, if the hatch identification card is a color card and color-coded according to the liquid type, the liquid type can be easily visually discerned, and a result that is less likely to be erroneously operated is obtained from the beginning. For example, regular gasoline is red,
By making the high-octane gasoline blue, the kerosene white, and the light oil yellow, it is possible for a person to easily discriminate and the operation becomes easier.

Further, in order to discriminate the colors of red, blue, white and yellow, for example, the hatch identification sensor 7 is irradiated with white light, and the white light is reflected by the hatch identification card. Light can be received by a photodiode having a peak value in the wavelength range, the received light signal can be represented by a combination of 3 bits corresponding to a color signal, and a color can be selected from an array of the combination of 3 bits.

[0015]

[Effect] As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: On the tank lorry vehicle side to which liquid is supplied, a hatch identification card indicating the type of liquid loaded for each hatch of the tank lorry vehicle is arranged in accordance with the hatch arrangement, and the storage tank side Also, a storage liquid identification card corresponding to the liquid type of the liquid storage tank is provided, and the hatch of the target liquid type and the storage tank are connected by a connecting hose, and only when both liquid types are the same Since it is automatically judged that the liquid can be supplied, there is no human error in mixing the liquid, and the judgment means consisting of the hatch identification card, the stored liquid identification card, the identification sensor and the detection unit can be used to make an inexpensive determination and a safe supply. Liquid becomes possible. (2) Effect corresponding to claim 2: With the configuration of one identification sensor for the detector unit, it is suitable for use as a portable device, liquid type (color) detection at any place is possible, and each card It is possible to make the price lower than that of the identification sensor for. (3) Effect corresponding to claim 3: The hatch identification card and the stored liquid identification card to be collated with the hatch identification card are also color cards according to the type of liquid, so that it is easy for humans to visually judge and operate with confidence. This enables quick and safe liquid supply.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an embodiment of a mixed liquid prevention system according to the present invention.

[Explanation of symbols]

1 ... Tank truck, 2a-2n ... Hatch, 3a-3n
... Refueling line, 4a-4n ... Discharge valve, 5 ... Card box, 6a, 6b-6n ... Hatch identification card, 7 ... Hatch identification sensor, 8, 11 ... Sensor code, 9a, 9b-9k
... Reservoir identification card, 10 ... Reservoir identification sensor, 12a, 1
2b to 12k ... Liquid storage line, 13a, 13b to 13k ...
Automatic valves, 14a, 14b to 14k ... Liquid storage tanks, 15 ...
Connection hose, 16 ... Detector unit, 17 ... Control circuit,
18 ... Judgment signal line, 19 ... Discharge valve drive signal line,
20 ... Automatic valve drive signal line.

Claims (3)

[Claims] 1. A hatch identification card defined corresponding to a liquid type loaded in a hatch of a tank lorry vehicle, and a card box mounted on the tank lorry vehicle for storing the hatch identification card according to the arrangement of the hatches. , A hatch identification sensor for detecting the liquid type of a hatch identification card stored in the card box, an automatic valve for connecting to a discharge valve provided for each hatch of a tank truck and a connection hose for supplying liquid to a storage tank, A stored liquid identification card that corresponds to the automatic valve and is determined for each liquid type in the liquid storage tank, a stored liquid identification sensor that detects the liquid type that corresponds to the stored liquid identification card, the hatch identification sensor, and the stored liquid identification It is composed of a detector unit that discriminates the difference in liquid type from the output from the sensor, and a control circuit that opens the discharge valve and the automatic valve only when the discrimination signal of the detector unit is the same liquid type. A mixed liquid prevention system characterized by being made. 2. An identification sensor in which a hatch identification sensor for detecting a liquid type corresponding to a hatch identification card and a stored liquid identification sensor for detecting a liquid type corresponding to a stored liquid identification card can be used in common. A detector unit having storage means for storing the detected liquid types of the hatch identification card and the stored liquid identification card, and the liquid types of the hatch identification sensor and the stored liquid identification sensor stored in the detector unit. 2. The mixed liquid prevention system according to claim 1, further comprising a control circuit that opens the automatic valve only when they are equal. 3. The mixed liquid prevention system according to claim 1, wherein the hatch identification card and the stored liquid identification card are color cards determined in correspondence with the liquid type.