JP2001088900A - Unloading system of tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unload without causing an underground tank at a specified gas station to overflow and to perform reliably unloading only at the specified gas station even if a plurality of stations are located in the vicinity. SOLUTION: An identification card 21 on which identification information for specifying a gas station is written is provided for each of gas stations 3. A controller 11 mounted on a tank lorry 1 reads the identification information when the identification card 21 provided at the gas station 3 of interest is set, and writes the information into oil amount confirmation data for confirming an oil amount from an underground tank 4 at the station 3 of interest for transmitting in a predetermined cycle. A radio 24 provided at each station 3 transmits an oil amount signal of the underground tank 4 connected with a tank 2 as a response signal, if the identification information included in the oil amount confirmation data indicates that station. The controller 11 controls to stop feeding from the tank 2 to the underground tank 4 when the oil amount signal received as a response to the confirmation data indicates that the tank is full.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank truck for supplying and receiving various petroleum products to a tank unit, transporting the received petroleum products to a gas station, and unloading the petroleum products stored in the tank unit. The present invention relates to an unloading system for a tank truck.

[0002]

2. Description of the Related Art Generally, in order to carry petroleum products such as gasoline into a tank of a gas station, oil is supplied to each hatch of a tank truck for each type of oil at an oil depot and received. The transported petroleum products are transported to gas stations, and the petroleum products in each hatch are unloaded to underground tanks at the gas stations by oil type. At the time of this unloading, a hose is connected between the discharge port of the tank truck of the tank truck and the refueling port of the underground tank of the refueling station. The tank is refueled for each oil type.

There are a plurality of types of petroleum products handled at a gas station, such as high octane number gasoline, regular gasoline, light oil, and kerosene, and these petroleum products are stored in underground tanks for each oil type. Similarly, the tank truck has a hatch portion for each oil type.

[0004] Therefore, when carrying various petroleum products from a tank truck to a tank of a gas station, it is necessary to confirm that the oil types are not different from each other.

Therefore, conventionally, as the above-mentioned confirmation work, the operator of the tank lorry vehicle and the person in charge of the refueling station mutually communicate with each other except for the unloading control by the instrumentation system installed at some unloading destinations. Pointing and calling were carried out, and the unloading hose of the tank truck was connected to the filling port of the gas station to unload petroleum products of the same oil type.

[0006]

However, the confirmation work between the operator of the tank lorry vehicle and the person in charge of the gas station is very complicated, and there is an error in pointing and calling each other. Occurs, various problems as described below occur, and subsequent recovery work requires a great deal of time.

In particular, the volume of petroleum products supplied from the hatch to the underground tank at the time of unloading is checked by the operator while checking the value on the meter. There is a problem that the underground tank overflows and oil products overflow from the inside.

For unloading a load to a predetermined position, double or triple checks can be performed for a normal load by providing a detection device such as an electric sensor. It is extremely unlikely that mistakes such as heterogeneous contamination occur.

However, since the cargo handled is petroleum products, which are dangerous substances that are strictly prohibited from fire and have explosive properties, they must be handled carefully, and the electric system must be configured close to the hatch of the tank truck and near the discharge port. It is not possible to arrange it near the fuel supply port of a gas station or the like, and this also causes a problem that the unloading work is troublesome.

Accordingly, the present invention has been made in view of the above-mentioned problems, and it is possible to unload petroleum products without overflowing an underground tank of a designated gas station by using radio waves, It is an object of the present invention to provide an unloading system for a tank truck that can reliably unload only a designated gas station even in a place where a plurality of locations are close to each other.

[0011]

In order to achieve the above object, according to the first aspect of the present invention, a petroleum product received in a tank section of a tank truck is supplied to an underground tank of a gas station for each type of oil and unloaded. In the unloading system of the tank truck, an identification card in which identification information for specifying the gas station is written is installed for each gas station, and the identification card installed at the gas station of the unloading destination is set. The tank lorry reads the identification information of the identification card, writes the read identification information into oil quantity confirmation data for confirming the oil quantity from the underground tank at the unloading gas station, and transmits the data at a predetermined cycle. A control device mounted on a vehicle, an oil amount measuring means for measuring an oil amount in an underground tank of the gas station, and an oil amount measuring unit provided for each gas station and transmitted from the control device. A wireless device that transmits, as a response signal, an oil amount signal from the oil amount measuring means of the underground tank connected to the tank unit of the tank truck when the identification information included in the amount confirmation data is information indicating the own store; The control device receives an oil amount signal from a wireless device at the unloading destination gas station as a response to the transmission of the oil amount confirmation data, and when the received oil amount signal does not indicate a full tank, It is characterized by controlling the start of refueling from the tank section to the underground tank, and controlling the stop of refueling from the tank section to the underground tank when the oil amount signal indicates that the tank is full.

According to a second aspect of the present invention, there is provided an unloading system for a tanker truck, in which petroleum products received in a tank portion of the tanker truck are supplied to an underground tank of a gas station for each type of oil and unloaded. A control device mounted on the tank lorry for transmitting oil quantity confirmation data for confirming the oil quantity from the underground tank at the gas station at a predetermined cycle, and an oil for measuring the oil quantity in the underground tank at the gas station When an identification card, which is provided for each of the filling stations and is provided with identification information for specifying the unloading destination filling station possessed by the petroleum product handler who rides on the tank truck, is set. The identification information of the identification card is read, and the oil meter of the underground tank connected to the tank unit of the tank truck when the read identification information is the information indicating the shop. A wireless device for transmitting an oil amount signal from the means as a response signal, wherein the control device receives the oil amount signal from the wireless device at the unloading refueling station as a response to the transmission of the oil amount confirmation data. Then, when the received oil amount signal does not indicate a full tank, the start of refueling from the tank section to the underground tank is controlled, and when the oil amount signal indicates a full tank, the tank section to the underground tank is controlled. The refueling stop is controlled.

According to a third aspect of the present invention, in the unloading system for a tank lorry vehicle according to the second aspect, the control unit unloads the identification information of the identification card in which the identification information for specifying the unloading destination gas station is written. It was read before, this read identification information was written in the oil amount confirmation data and transmitted at a predetermined cycle, and the radio was set with an identification card possessed by a petroleum product handler who got on the tank truck. When the identification information of the identification card is read, and the read identification information matches the identification information included in the oil amount confirmation data transmitted from the control device, the identification information is connected to the tank unit of the tank truck. An oil amount signal from the oil amount measuring means of the underground tank is transmitted as a response signal.

[0014]

FIG. 1 is a diagram showing a first embodiment of an unloading system for a tank truck according to the present invention, and FIG.
FIG. 3 is a block diagram showing a main part of FIG. 1, FIG. 3 is a diagram showing an example of a case where a plurality of gas stations are close to each other, and FIG. 4 is a flowchart of an unloading operation in the first embodiment.

The unloading system according to each of the embodiments described below supplies various types of petroleum products stored in an oil depot to the tank unit 2 of the tank truck 1 for each type of oil and receives the cargo. The vehicle 1 is driven and transported to a designated refueling station 3, and the received petroleum products in the tank 2 are unloaded to the underground tank 5 of the refueling station 3 for each oil type.

In an oil tank (not shown), petroleum products to be transported are stored in tanks for each type (for example, regular gasoline, high octane gasoline, light oil, kerosene, etc.). Each tank has a loading and
Equipped with a hose attached to the arm. By connecting this hose to the hatch of the tank truck 1, petroleum products stored in the tank are supplied to the hatch.

The tank unit 2 of the tank truck 1 shown in FIG. 1 has a plurality of tanks on which any one of the petroleum products is loaded in a predetermined unit amount according to the type of the petroleum products (regular gasoline, high octane gasoline, light oil, kerosene, etc.). Hatch.

Although not shown, the bottom of each hatch of the tank 2 is provided with an air-type hatch bottom driven by air from an air tank for opening and closing a solenoid valve for taking out stored petroleum products. A valve is provided. These hatch bottom valves are connected to the discharge port 5 via a common piping section.

The discharge port 5 is provided with a handle 6 which is manually opened when unloading petroleum products stored in the hatch.
have. This discharge port 5 is, like the hatch bottom valve,
For example, it is driven by air from an air tank when the solenoid valve is opened and closed, and the handle 6 is locked in a normal state (unloading state).

The tank truck 1 is equipped with a controller (control device) 11 shown in FIG. The controller 11 includes a card reading circuit 1 as information reading means.
2, a schematic configuration including a control circuit 13, an antenna 14, and a wireless circuit 15.

The card reading circuit 12 includes a gas station 3 described later.
When the identification card 21 installed for each is inserted into a card insertion slot (not shown) of the controller 11, the identification card 2
Read the identification information (identification code) written in 1,
The read identification information is sent to the control circuit 13.

The control circuit 13 writes the identification information of the identification card 21 sent from the card reading circuit 12 into oil amount confirmation data for confirming the oil amount of the underground tank 4 of the refueling station 3 to be unloaded. An instruction is output to the wireless circuit 15 for wireless transmission. Further, the control circuit 13
When the oil amount confirmation data including the identification information is transmitted from the wireless circuit 15 at a predetermined period, an oil amount signal transmitted from a wireless device 24 of the gas station 3 to be described later is captured via the wireless circuit 15 as a response signal. Then, it is determined whether or not the received oil amount signal is a signal indicating that the oil is full, and the start, prohibition, and stop of unloading of the petroleum product are controlled according to the determination result.

The radio circuit 15 transmits oil amount confirmation data in which the identification information of the identification card 21 is written based on a command from the control circuit 13 as radio waves from the antenna 14 at a predetermined period. The wireless circuit 15 receives a radio wave of an oil amount signal transmitted from a radio 24 of the gas station 3 described later as a response signal to the transmission of the radio wave of the oil amount confirmation data including the identification information, and receives the received oil amount. The amount signal is sent to the control circuit 13.

In the gas station 3, an identification card 21 in which identification information (identification code) for specifying the gas station is written in advance as an address in order to distinguish the gas station from other gas stations in the vicinity is installed. For example, as shown in FIG. 3, when the gas station 3 is a store A, a store B, a store C, and a store D, an identification card having an address “01” is set in the store A, and an address “02” is set in the store B. , An identification card with an address “03” is installed in store C, and an identification card with an address “04” is installed in store D.

When the petroleum products are unloaded to the store A of the gas station 3, that is, when the identification card 21 indicates the store A, at the gas station of the store A, the oil amount is checked from the controller 11 of the tank truck 1. Since the data address matches (address “01”), the radio wave is accepted. On the other hand, at the service stations of the stores B, C and D, the radio waves are ignored because the addresses are different from the addresses of the stores.

The gas station 3 has an underground tank 4 for each type of petroleum product. For example, the types of petroleum products handled are regular gasoline, high octane gasoline, light oil,
At least four kerosene types are provided. In addition, in the example of FIG. 1, only one underground tank 4 is shown.

Each underground tank 4 is provided with an oil amount detecting means 22 for detecting an oil amount in the tank. The oil amount detecting means 22 is formed, for example, by bending a single optical fiber core wire at the center and using the tip of the bent portion as a detecting portion, and covering the bent portion with a light-transmitting tube such as polycarbonate to form a stainless steel. The metal tube is inserted through the metal tube, and the periphery of the metal tube excluding the detection unit is further covered with a tube such as Teflon. One of the two branches is a light input unit to which light from a light source is incident, and the other is a light that outputs reflected light. An optical sensor as an output unit is used.

An optical sensor is provided for each underground tank 4 with a detecting unit located at a full oil level in the tank. If the amount of oil in the underground tank 4 does not reach the full position and the detection unit is not immersed in the oil level, the light incident on the light input unit is emitted from the detection unit and diffused to the surroundings. Thus, there is almost no reflected light returning to the optical fiber core wire via the detection unit. On the other hand, when the amount of oil in the underground tank 4 reaches the full tank position and the detection unit of the optical sensor is immersed in the oil surface, the light incident on the light incident unit is emitted from the detection unit, and the light is emitted from the oil detection unit. The light is reflected by the (oil surface) and returns to the optical fiber core via the detection unit. The optical signal at this time is converted into an electric signal, and then output to the oil meter 23 as an oil amount detection signal.

The oil amount detecting means 22 is not limited to the above-described optical sensor, but may be a normal float type. In the case of the float type, a column is erected upright in the underground tank 4 so that the float can be moved up and down. Measure the distance from the ceiling surface to the oil surface.

The oil amount meter 23 constitutes an oil amount measuring means together with the oil amount detecting means 22, and constantly measures the oil amount in each underground tank 4 based on the oil amount detection signal from the oil amount detecting means 22. Then, the measurement signal is transmitted to the wireless device 24.

The wireless device 24 is provided with a wireless circuit 24a and an antenna 24b, and receives oil amount confirmation data including identification information transmitted from the wireless circuit 15 of the controller 11 of the tank truck 1 at predetermined intervals. . Radio 2
4, when the identification information included in the received oil amount confirmation data matches the identification information of the shop, the oil amount meter 23 of the underground tank 4 connected to the discharge port 5 of the tank unit 2 of the tank truck 1. 24b as a response signal using the oil amount signal of
Sent from. On the other hand, if the identification information included in the received oil amount confirmation data does not match the identification information of its own store, the wireless device 24 ignores the data.

Next, an unloading method by the above-described unloading system will be described with reference to the flowchart of FIG.

First, when the driver arrives at the designated refueling station 3, the driver takes the identification card 21 installed at the refueling station 3 and returns to the tank truck 1 (ST1). continue,
The identification card 21 is stored in the controller 1 of the tank truck 1
1 (ST2), and the identification information in the identification card 21 is read by the card reading circuit 12. The identification information read at this time is taken into the control circuit 13.

Next, an unloading operation is performed by connecting the hose 25 between the discharge port 5 of the tank section 2 of the tank truck 1 and the fuel port of the underground tank 4 of the gas station 3 (ST3). In parallel with this operation, the control circuit 13 writes the identification information read by the card reading circuit 12 into oil amount confirmation data for confirming the oil amount of the underground tank 4 of the gas station 3 to be unloaded. This data is transmitted wirelessly from the antenna 14 of the wireless circuit 15 (ST4).

When the oil amount confirmation data including the identification information is transmitted, the data is received by the wireless device 24 of the gas station 3. Then, the wireless device 24 of the gas station 3 determines that the identification information included in the oil amount confirmation data is the identification information of its own store (for example, as shown in FIG. 3, if the gas station 3 is the store A, the address is “01”). If it matches, the oil meter 23 of the underground tank 4 connected to the discharge port 5 of the tank part 2 of the tank truck 1
Is returned as a response signal by wireless (ST
5).

The oil amount signal, which is the response signal, is received by the wireless circuit 15 of the controller 11 via the antenna 14, and the received oil amount signal is taken into the control circuit 13. If the taken oil amount signal is a signal indicating full (ST6-full), the control circuit 13 prohibits unloading (ST7). That is, the hatch bottom valves of all hatch portions of the tank portion 2 are closed. In contrast, the control circuit 1
No. 3 starts unloading if the taken-in oil amount signal is not a signal indicating full (ST6-full or less) (ST6).
8). That is, the hatch bottom valve of the hatch portion to be unloaded is opened. As a result, oil flows to the oil supply port of the underground tank 4 connected to the discharge port 5 of the tank unit 2 of the tank truck 1 via the hose 25.

When the unloading is started as described above, the control circuit 13 checks the amount of oil in the underground tank 4 of the refueling station 3 from which the unloading is to be performed. The operation of writing the read identification information by the unit 12 and wirelessly transmitting the data from the antenna 14 of the wireless circuit 15 is repeated at a predetermined cycle (ST9).

Then, an oil amount signal is wirelessly returned as a response signal from the wireless device 24 of the gas station 3 that matches the identification information included in the oil amount confirmation data (ST10). The returned oil amount signal is taken into the control circuit 13 via the wireless circuit 15 of the controller 11. Then, if the taken oil amount signal is a signal indicating full (ST11-full), the control circuit 13 stops unloading (ST12). That is, the hatch bottom valve of the hatch portion where the unloading is being performed is closed. In contrast, the control circuit 13
If the received oil amount signal is not a signal indicating that the tank is full (ST11-not more than full) and there is an operation to end unloading (ST13-yes), the unloading is ended (ST14).
Further, if the taken-in oil amount signal is not a signal indicating full tank (ST11-full tank or less), and if there is no operation to finish unloading (ST13-none), the operation returns to ST9.

As described above, in the unloading system according to the first embodiment, when the tank truck 1 receiving various petroleum products arrives at the designated refueling station 3, the driver is installed at the refueling station 3. Bring the identification card 21 and set it in the controller 11, and set the identification card 2
1 in the card reading circuit 1 in the controller 11.
Let 2 read. Thereafter, the hose 25 is connected to the filler port of the underground tank 4 to be unloaded, and an unloading start operation is performed.

Then, the oil level of the unloading underground tank 4 is confirmed by radio by transmitting and receiving an oil amount signal in response to the oil amount confirmation data from the controller 11, and if there is an empty space in the unloading underground tank 4, Oil flows into the underground tank 4 and unloading is started. Then, when the oil level in the underground tank 4 becomes full during unloading, the unloading is automatically stopped.

Next, FIG. 5 is a view showing a second embodiment of the unloading system for a tank truck according to the present invention, FIG. 6 is a block diagram showing the main parts of FIG. 5, and FIG. It is a flowchart of an unloading operation.

The same components as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.

In the unloading system according to the second embodiment, an identification card 31 on which identification information (identification code) of the unloading gas station 3 is written is set in the controller 11, and the identification card 31 in the set identification card 31 is used. Is read by the card reading circuit 12 in advance. The identification information read at this time is taken into the control circuit 13. At this time, the identification card 31 read by the card reading circuit 12 is carried by a petroleum product handler (for example, a driver or a passenger) who gets on the tank truck 1.

The wireless device 24 of the gas station 3 receives the oil amount confirmation data including the identification information transmitted at a predetermined cycle from the wireless circuit 15 of the controller 11 of the tank lorry 1, and the wireless circuit 24 a and the antenna 24b, a card reading circuit 24c is provided. Card reading circuit 24
c indicates the identification information in the identification card 31 that is set when the identification card 31 (the identification information of the designated gas station 3) written by the driver is set in the radio 24. The read identification information is sent to the wireless circuit 24a.

When the identification information included in the received oil amount confirmation data matches the identification information sent from the card reading circuit 24c, the wireless device 24 communicates with the discharge port 5 of the tank unit 2 of the tank lorry 1 Underground tank 4 connected
The oil amount signal from the oil amount meter 23 is transmitted from the antenna 24b as a response signal. On the other hand, the radio 24
If the identification information included in the received oil amount confirmation data does not match the identification information sent from the card reading circuit 24c, the data is ignored.

Next, an unloading method by the above-mentioned unloading system will be described with reference to the flowchart of FIG.

First, at the time of receiving a petroleum product, an identification card 31 on which identification information indicating the unloading destination gas station 3 is written.
Is set in the controller 11, and the identification information in the identification card 31 is read by the card reading circuit 12. The identification card 31 read by the card reading circuit 12 is
Carried by a petroleum product handler who gets on the tanker truck 1. Then, when the received tank truck 1 arrives at the designated gas station 3, the card reading circuit 12 reads it in advance and sets the identification card 31 carried by the driver in the radio 24 of the gas station 3 (ST21). This identification card 3
1 is read by the card reading circuit 24c. The identification information read at this time is transmitted to the wireless circuit 24.
sent to a.

Next, an unloading operation is performed by connecting the hose 25 between the discharge port 5 of the tank section 2 of the tank truck 1 and the fuel port of the underground tank 4 of the gas station 3 (ST22). In parallel with this operation, the control circuit 13 writes the identification information read by the card reading circuit 12 into oil amount confirmation data for confirming the oil amount of the underground tank 4 of the gas station 3 to be unloaded. This data is transmitted to the antenna 14 of the wireless circuit 15.
It is transmitted more wirelessly (ST23).

When the oil amount confirmation data including the identification information is transmitted, the data is received by the radio 24 of the gas station 3. Then, the wireless device 24 of the gas station 3 transmits the identification information included in the oil amount confirmation data to the identification information read by the card reading circuit 24c (for example, as shown in FIG. "01")
The oil amount signal from the oil amount meter 23 of the underground tank 4 connected to the discharge port 5 of the tank unit 2 of the tank truck 1 is wirelessly returned as a response signal (ST24).

The oil amount signal as the response signal is received by the wireless circuit 15 of the controller 11 via the antenna 14, and the received oil amount signal is taken into the control circuit 13. Then, if the taken oil amount signal is a signal indicating full (ST25-full), the control circuit 13 prohibits unloading (ST26). In contrast, the control circuit 1
No. 3 starts unloading if the taken-in oil amount signal is not a signal indicating full (ST25-full or less) (S25).
T27). That is, the tank unit 2 of the tank truck 1
The oil flows to the oil supply port of the underground tank 4 connected to the discharge port 5 of the underground tank 4 via the hose 25.

When the unloading is started as described above, the control circuit 13 adds a card reading circuit to the oil amount confirmation data in order to check the oil amount of the underground tank 4 of the refueling station 3 which is still unloading. The operation of writing the read identification information by the unit 12 and wirelessly transmitting the data from the antenna 14 of the wireless circuit 15 is repeated at a predetermined cycle (ST28).

Then, the oil amount signal is wirelessly returned as a response signal from the wireless device 24 of the gas station 3 that matches the identification information included in the oil amount confirmation data (ST29). The returned oil amount signal is taken into the control circuit 13 via the wireless circuit 15 of the controller 11. Then, if the taken-in oil amount signal is a signal indicating full (ST30-full), the control circuit 13 stops unloading (ST31). On the other hand, the control circuit 13 ends the unloading if the taken-in oil amount signal is not a signal indicating the full state (ST30-not more than full) and there is an operation of unloading end (ST32-yes). (ST33). Further, the taken oil amount signal is not a signal indicating that the tank is full (ST30-
If the operation is not completed (ST32).
-None), returning to the operation of ST28.

As described above, in the unloading system according to the second embodiment, when the tank truck 1 having received various petroleum products arrives at the refueling station 3 to be unloaded, the driver operates the refueling station 3 of the unloading destination. Identification card 3 with identification information written
1 is set in the wireless device 24 of the gas station 3 and the identification information of the set identification card 31 is read by the card reading circuit 24c in the wireless device 24. Thereafter, the hose 25 is connected to the filler port of the underground tank 4 to be unloaded, and an unloading start operation is performed.

Then, the oil level of the underground tank 4 to be unloaded is confirmed wirelessly by sending and receiving an oil amount signal to the oil amount confirmation data from the controller 11, and if there is an empty space in the unloading underground tank 4, Oil flows into the underground tank 4 and unloading is started. Then, when the oil level in the underground tank 4 becomes full during unloading, the unloading is automatically stopped.

Therefore, according to the unloading system of each embodiment described above, if the identification information of the identification card 21 (or 31) is not the information indicating the refueling station 3 of the unloading destination, the controller 11 wirelessly transmits the information. Since there is no response signal from the gas station 3 for the oil quantity confirmation data to be sent and the unloading of petroleum products is not performed, communication with the radio equipment of the gas station at another store other than the designated destination should be avoided. It is possible to reliably unload petroleum products only to the designated gas station without unloading the petroleum products by mistake with the store's gas station. In addition, even in a place where a plurality of gas stations 3 are close to each other, it is possible to unload petroleum products only to a designated gas station.

Further, during the unloading of the petroleum products to the underground tank 4 of the designated refueling station 3, if the underground tank 4 becomes full of oil, the unloading is automatically stopped.
The oil product does not overflow from the inside of the underground tank, and the underground tank can be reliably prevented from overflowing.

Incidentally, in the above-described second embodiment, it is also possible to adopt a configuration in which the card reading circuit 12 of the controller 11 is omitted. In this case, when the identification card 21 possessed by the petroleum product handler is set, the wireless device 24 of the unloading destination gas station 3 reads the identification information by the card reading circuit 24c, and the read identification information is automatically read. When the information coincides with the information of the store, every time the oil amount confirmation data is transmitted from the controller 11 at a predetermined cycle, the oil amount signal of the underground tank 4 connected to the tank unit 2 of the tank truck 1 is transmitted as a response signal, Other operations are performed in the same manner as in the second embodiment.

[0058]

As is apparent from the above description, according to the unloading system of the present invention, even if a plurality of gas stations are in close proximity, unloading of petroleum products can be mistaken for a gas station of another store. And the unloading of petroleum products can be performed only at designated gas stations.

In addition, when the oil in the underground tank becomes full during unloading of the petroleum products, the unloading is automatically stopped, so that the petroleum products do not overflow from the inside of the underground tank. In addition, the underground tank can be reliably prevented from overflowing.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a tank lorry unloading system according to the present invention.

FIG. 2 is a block diagram showing a main part of FIG. 1;

FIG. 3 is a diagram showing an example of a case where a plurality of gas stations are close to each other;

FIG. 4 is a flowchart of an unloading operation in the first embodiment.

FIG. 5 is a view showing a second embodiment of an unloading system for a tank truck according to the present invention.

FIG. 6 is a block diagram showing a main part of FIG. 5;

FIG. 7 is a flowchart of an unloading operation in the second embodiment.

[Explanation of symbols]

1 ... tank truck, 2 ... tank section, 3 ... gas station, 4
... underground tank, 11 ... controller (control device), 2
1, 31: identification card, 22: oil amount detecting means, 23: oil amount meter, 24: wireless device.

Claims (3)

[Claims] 1. An unloading system for a tank truck that refuels and unloads a petroleum product received in a tank section of a tank truck for each type of oil in an underground tank of a filling station, wherein identification information for specifying the filling station is written. The identification card is installed at each of the gas stations, and when the identification card installed at the unloading gas station is set, the identification information of the identification card is read, and the read identification information is used as the identification information. A control device mounted on the tank truck that writes in oil quantity confirmation data for confirming the oil quantity from the underground tank at the unloading gas station and transmits it at a predetermined cycle, and oil in the underground tank at the gas station. An oil amount measuring means for measuring an amount, and provided when the identification information included in the oil amount confirmation data transmitted from the control device is information indicating the own store, provided for each of the gas stations. A wireless device for transmitting, as a response signal, an oil amount signal from the oil amount measurement unit of the underground tank connected to the tank unit of the tank lorry vehicle, wherein the control device responds to the transmission of the oil amount confirmation data. As receiving the oil amount signal from the radio equipment of the unloading refueling station, when the received oil amount signal does not indicate full, control the start of refueling from the tank unit to the underground tank, An unloading system for a tank lorry, wherein the stop of refueling from the tank section to the underground tank is controlled when the oil amount signal indicates that the tank is full. 2. A tanker truck unloading system for refueling and unloading petroleum products received in a tank section of a tanker truck for each type of oil into an underground tank of a filling station, A control device mounted on the tank truck that transmits oil amount confirmation data for confirming the oil amount at a predetermined cycle, and an oil amount measuring unit that measures an oil amount in the underground tank of the gas station, The identification information of the identification card is set when an identification card provided for each of the gas stations and written with identification information for specifying the unloading gas station to be carried by the petroleum product handler who gets on the tank truck is set. And when the read identification information is the information indicating the store, the oil amount from the oil amount measuring means of the underground tank connected to the tank portion of the tank truck. A wireless device that transmits a signal as a response signal, the control device receives an oil amount signal from a wireless device of the unloading destination gas station as a response to the transmission of the oil amount confirmation data, and receives the received signal. When the oil amount signal does not indicate a full tank, the start of refueling from the tank unit to the underground tank is controlled, and when the oil amount signal indicates a full tank, the stop of refueling from the tank unit to the underground tank is controlled. An unloading system for tank trucks. 3. The control device reads, prior to unloading, identification information of an identification card on which identification information for specifying a gas station to be unloaded is written, and writes the read identification information to the oil amount confirmation data. The wireless device reads the identification information of the identification card when the identification card possessed by the petroleum product handler who gets on the tank truck is set, and the read identification information is When the identification information included in the oil amount confirmation data transmitted from the control device matches the identification information, an oil amount signal from the oil amount measurement unit of the underground tank connected to the tank unit of the tank truck is a response signal. 3. The unloading system for a tank lorry according to claim 2, wherein the transmission is performed as: