JPH11240600A - Oil transfer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent petroleum products from being mixed when they are loaded/unloaded. SOLUTION: In an oil transport system in which petroleum products stored in an oil station 1 are loaded into a hatch part of a tank lorry 2 for every oil kind, and petroleum products in the loaded hatch part are unloaded to a service station 4 for every oil kind, the tank lorry 2 is provided with a bottom valve 17 on the hatch part, the bottom valve 17 is connected to a discharge port 19 having a discharge valve 33 through a piping 18, and the tank lorry 2 is provided with opening/closing detectors 29, 37 to detect the opening/closing condition of the bottom valve 17 and the discharge valve 33 through a mechanical structure, and a control device 41 to check the opening/closing condition of the bottom valve 17 and the discharge valve 33 based on the detected signal of the opening/closing detectors 29, 37 and to close the valves which have been judged to be in the open condition.

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. Oil supply system.

[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, an unloading hose is connected between the discharge port of the tank truck of the tank truck and the refueling port of the gas station, and the petroleum products are supplied in hatch units through the refueling port to the underground tank of the gas station. Are refueled by oil type.

[0003] By the way, petroleum products handled at a gas station include a plurality of types such as high octane gasoline (hereinafter referred to as high volatility gasoline), regular gasoline (hereinafter referred to as general gasoline), light oil, and kerosene. 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.

[0007] Petroleum products received by a tank truck are refueled and stored in an underground tank of a refueling station for each oil type in units of hatches, and each hatch is connected to a discharge port through a common pipe. Therefore, when unloading at the refueling station and receiving new petroleum products at the oil depot, refilling the hatch with remnants of oil from the previous petroleum product in the hatch and reloading the Petroleum products may be mixed.

[0008] Even if the oil type of the tank at the unloading destination is the same as the oil type unloaded from the tank lorry, unloading is performed in hatch units. The right amount of oil cannot be unloaded at the place.

When the last oil type stored in the hatch is high-volume gasoline or general-purpose gasoline, and kerosene is received in the hatch this time, if it is received without degassing, it is explosive and dangerous. There is a problem that exerts.

[0010] Since 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 of the meter, if the refueling is continued without performing the checking operation, the underground tank is replenished. The problem is that petroleum products overflow.

The operation of unloading a cargo to a predetermined position is performed by
For a normal load, double or triple checks can be performed by providing a detection device such as an electric sensor, and errors such as the mixing of different types as described above are extremely unlikely to occur.

However, since the cargo handled is petroleum products, which are dangerous substances which are flammable and have explosive properties, they must be handled carefully, and the configuration of the electric system must be changed near 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.

In order to solve the above-mentioned problems, the present invention provides an oil feeding system capable of safely performing oil receiving and unloading of petroleum products while improving workability. It is intended to be.

[0014]

Means for achieving the above object will be described with reference to the drawings corresponding to the embodiments. According to the first aspect of the present invention, the petroleum products stored in the oil depot 1 are refueled to the hatch portion 8 of the tank truck 2 by oil type and received, and the received petroleum products in the hatch portion 8 are refueled for each oil type. In the oil feeding system for refueling and unloading the tank 5 in the place 4, the tank truck 2 has a bottom valve 17 in the hatch portion 8, and the bottom valve 17 has a discharge valve 33 through a pipe 18. The open / close detectors 29 and 37 are connected to the discharge port 19 and detect the open / close state of the bottom valve 17 and the discharge valve 33 via a mechanical system structure, based on detection signals of the open / close detectors 29 and 37. And a control device 41 for judging the open / closed state of the bottom valve 17 and the discharge valve 33 and closing and driving the valve determined to be open.

According to a second aspect of the present invention, in the oil supply system according to the first aspect, an oil level measuring means 31 for measuring an oil level in the hatch portion 8 is provided. It is characterized in that the presence or absence of residual oil in the hatch 8 is determined on the basis of the measurement result, and when it is determined that there is residual oil in the hatch 8, an alarm prompting the residual oil processing is output.

According to a third aspect of the present invention, the petroleum products stored in the oil depot 1 are supplied to the hatch portion 8 of the tank lorry 2 according to the type of oil and received, and the received petroleum products in the hatch portion 8 are classified into the oil type. In the oil feeding system for refueling and unloading the tank 5 of the refueling station 4 every time, the oil tank station 1 includes an oil type indicating the type of petroleum product for each supply means 6 for supplying the petroleum product to the hatch portion 8. An oil type signal generating device 10 for generating an oil type signal indicating the oil type when the oil type key 7 matches the oil type information; A degassing signal generator 27 that generates a degassing signal when performing degassing processing in the hatch portion 8
With the oil type signal from the oil type signal generator 10 as an input, the oil type of the oil type signal at the time of receiving the previous time is a high-volume gasoline or a normal gasoline, and the oil type signal at the time of receiving this time is received. When the oil type is kerosene, it is determined that the degassing process is necessary, and when the degassing process is determined to be necessary and the degassing signal is not input from the degassing signal generator 27, an alarm prompting the degassing process is issued. Output control device 4
1 is provided.

According to a fourth aspect of the present invention, the petroleum products stored in the oil depot 1 are refueled to the hatch 8 of the tank truck 2 by oil type and received, and the received petroleum products in the hatch 8 are classified by oil type. In the oil feed system for refueling and unloading the tank 5 of the refueling station 4 every time, the refueling station 1 includes an oil level measuring means 53 for measuring an oil level in the tank 5 and outputting an oil level signal. And a transmitting device 54 for transmitting an oil level signal of the oil level measuring means 53.
Has a bottom valve 17 in the hatch portion 8, and the bottom valve 17 is connected to a discharge port 19 having a discharge valve 33 through a pipe 18, and the unloading device 54 is used when unloading the petroleum product.
To determine whether or not the tank 5 is full, and when it is determined that the tank 5 is full, an alarm is output and the bottom valve 17 of the hatch 8 and A control device 41 for closing the discharge valve 33 to stop unloading is provided.

According to a fifth aspect of the present invention, in the oil feed system of the fourth aspect, the discharge port 19 is provided with an unloading hose connection detecting means 34 for detecting whether or not a discharge hose 35 is connected to the discharge port 19. The unloading hose 3 for the refueling port 51 is provided at each refueling port 51 of the refueling station 4.
5 is provided with an oil-type unloading hose connection detecting means 52 for detecting the presence / absence of connection of the oil-type unloading hose connection detecting means 52 together with the oil level signal of the oil level measuring means 53. The control device 41 transmits a signal indicating whether or not the unloading hose 35 is connected based on the detection signal, and the control device 41 transmits a detection signal from the unloading hose connection detection unit 52 and a transmission signal from the transmission device 54. It is determined whether or not the unloading hose 35 is normally connected between the discharge port 19 and the refueling port 51 based on the signal, and the refueling port 5 to which the unloading hose 19 is connected is determined.
It is characterized in that the type of oil in the first tank 5 is recognized.

In the oil feeding system according to the fifth aspect, the transmitting device is connected to the control device 41 by wire or wirelessly, and the oil level signal of the oil level measuring means 53 and the oil type unloading connection signal are provided. Is transmitted to the control device 41.

[0020]

FIG. 1 is an overall configuration diagram showing an embodiment of an oil feeding system according to the present invention, and FIG. 2 is a schematic view of a tank truck applied to the oil feeding system.

In the oil feed system according to this embodiment, various petroleum products stored in the oil depot 1 are supplied to the tank unit 3 of the tank truck 2 for each type of oil, and the cargo is received. It is operated to transport to the gas station 4 and unloads the received petroleum products in the tank section 3 to the underground tank 5 of the gas station 4 for each oil type.

In the oil tank station 1, petroleum products to be fed are classified by type (for example, high-volume gasoline, general-purpose gasoline, light oil,
Kerosene) in a tank (not shown). Each tank is equipped with a loading hose 6 attached to a loading arm as a supply means. Receiving hose 6
Is connected to a lubrication port 25 of a hatch portion 8 of the tank truck 2, which will be described later. Petroleum products stored in the tank are supplied to the hatch portion 8 through the load receiving hose 6.

The loading arm has an oil type key 7 (a key 7a for a high-volume gasoline, a key 7a for a high-volume gasoline) having a different keyway for each type of petroleum product stored in a tank to which the receiving hose 6 is connected. A gasoline key 7b, a light oil key 7c, and a kerosene key 7d) are provided for each receiving hose 6. These oil type keys 7a to 7d are suspended from a loading arm of a tank in which a corresponding type of petroleum product is stored.

As shown in FIG. 2, the tank unit 4 of the tank truck 3 is provided with a predetermined unit amount of any of the petroleum products according to the type of the petroleum products (high-volume gasoline, common gasoline, light oil, kerosene, etc.). (For example, 1K1, 2K1, and 4K1). In the example of FIG.
Hatches 8a, 8b, 8c, 8d, 8e, 8f, 8
g constitutes the tank unit 3. In FIG. 2, hatch portions 8 are first to third hatch portions 8a,
8b and 8c are front hatch portions 8A, and the fourth to seventh hatch portions 8d, 8e, 8f and 8g are rear hatch portions 8B.

Each hatch 8 is provided with an oil type valve key box 9 as an oil type signal generator. The oil type valve key box 9 comprises an oil type valve key 10 comprising a number of cylinder locks corresponding to the type of petroleum product to be handled.
have.

In this embodiment, the types of petroleum products to be handled are high-volume gasoline, general-purpose gasoline, light oil, and kerosene.
As shown in FIG. 3, four oil type valve keys 10a, 10b, 10c, and 10d are arranged side by side on the upper surface of a box-shaped box body 9a.

An eccentric cam plate 11 is attached to the tip of the cylinder lock of each oil type valve key 10. The eccentric cam plate 11 is configured to rotate in conjunction with the rotation axis of the cylinder lock when the oil type key 7 matching the key groove of the cylinder lock is inserted into the keyhole and rotated. .

An air switch 13 is provided on the box body 9a via an L-shaped mounting member 12 for each oil type valve key 10. The air switch 13 includes a switch main body 14 in which a flow path for air is formed, an operating member 15 extending from the switch main body 14 on a rotation locus of the eccentric cam plate 11, and a switch main body 14 by pressing the operating member 15. And an actuator 16 for closing the flow path.

When the actuator 16 is pushed via the operating member 15 by the rotation of the eccentric cam plate 11 and the flow path of the switch body 14 is closed by the rotation of the eccentric cam plate 11, the oil type key is turned off. Assuming that the oil type information of the oil type valve key 7 matches the oil type information of the oil type valve key 10,
An oil type signal S1 indicating the oil type of the oil type key 7 inserted in the keyhole of the cylinder lock 0 is sent to the main controller 41 described later.
Is input to the control unit 45.

On the bottom surface of each hatch portion 8, an air type bottom valve 17 driven by air from an air tank for opening and closing a solenoid valve for taking out the petroleum products stored in the hatch portion 8 is respectively provided. Is provided. These bottom valves 17 are connected to a discharge port 19 via a common piping section 18.

To further explain, in the example of FIG. 2, the bottom valves 17 of the hatch portions 8a to 8c forming the front system hatch portion 8A are connected to the first common piping portion 18a, and the hatch portions forming the rear system hatch portion 8B are formed. The bottom valves 17 of the sections 8d to 8g are connected to the second common piping section 18b. Further, the first and second common piping sections 1
Each of 8a and 18b has an intermediate gate valve 20 at the center and is connected to a third common pipe portion 18c provided with discharge ports 19 on both sides thereof.

The first common pipe section 18a is provided with a front flow meter 21 for measuring the flow rate of petroleum products flowing in the pipe. Similarly, the second common piping section 18b is also provided with a rear flow meter 22 for measuring the flow rate flowing in the piping. A flow signal S2 obtained by the measurement of the flow meters 21 and 22 is input to a control unit 45 of the main controller 41 described later.

The intermediate gate valve 20 is provided with an opening / closing lever 28 for opening and closing the valve. The opening / closing lever 28 is provided with an opening / closing detector 29 for converting an air signal into a contact signal in accordance with the operation of the opening / closing lever 28, for example, similarly to the air switch 13 described above. This open / close detector 2
The contact signal 9 is input to a control unit 45 of the main controller 41 described later as a signal S3 indicating the open / close state of the intermediate gate valve 20.

A bottom valve opening / closing handle 23 connected to the bottom valve 17 is provided on a ceiling portion of each hatch portion 8. The bottom valve opening / closing handle 23 is driven to open and close by a bottom valve opening / closing motor 24 as bottom valve opening / closing drive means, and is normally locked. When the bottom valve drive signal S4 of “open” from the control unit 45 of the main controller 41 described later is input to the bottom valve opening / closing motor 24, the lock of the bottom valve opening / closing handle 23 is released. On the other hand, when a bottom valve drive signal S4 of “closed” is input to the bottom valve opening / closing motor 24 from the control unit 45 of the main controller 41 described later, the bottom valve opening / closing handle 23 is automatically locked.

The bottom valve opening / closing handle 23 of each bottom valve 17 includes:
For example, similarly to the air switch 13 described above, an open / close detector 37 that converts an air signal into a contact signal according to the operation of the bottom valve opening / closing handle 23 is provided. The contact signal of the open / close detector 37 is a signal S7 indicating the open / close state of the bottom valve 17.
The control unit 45 of the main controller 41 described later
Is input to

An oil inlet 25 into which the receiving hose 6 is inserted is provided in a ceiling portion of each hatch portion 8. A manhole cover 26 is attached to the lubrication port 25. The manhole cover 26 is driven to be opened and closed by air from an air tank accompanying opening and closing of a solenoid valve, for example.
The lock of the manhole cover 26 is released when a hatch opening / closing drive signal S5 of “open” is input from the control unit 45 of the main controller 41 described later. On the other hand, when a “closed” hatch opening / closing drive signal S5 is input from the control unit 45 of the main controller 41 described later, the manhole cover 26 is automatically locked.

Each hatch section 8 is provided with a gas vent valve key 27 as a gas vent signal generator. The gas release valve key 27 converts an air signal into a contact signal when, for example, a key corresponding to the key hole of the cylinder lock is inserted into the key hole and rotated, similarly to the oil type valve key 10 described above. This contact signal is input to a control unit 45 of the main controller 41, which will be described later, as a degassing signal S6 indicating that degassing is being performed. The degassing operation at that time is performed by connecting a degassing hose (not shown) and opening a degassing valve 30 provided in each hatch portion 8.

Each hatch section 8 is provided with an in-hatch oil level gauge 31 as oil level measuring means. The in-hatch oil level gauge 31 measures the oil surface position and capacity of petroleum products in the hatch portion 8. For example, an optical sensor is attached to the ceiling surface in the hatch portion 8, and light is directed from the optical sensor toward the oil surface. And emits
The light reflected by the oil surface is detected, the distance from the ceiling surface to the oil surface is measured, and the capacity of the petroleum product in the hatch 8 is measured from this distance and the volume in the hatch 8. In addition, as the oil level gauge 31 inside the hatch, a column is erected in the hatch portion 8 and a float is mounted so that the float can move up and down. The distance from the ceiling surface to the oil surface may be measured and captured. The oil level signal S8 obtained by the measurement of the oil level gauge 31 in the hatch is transmitted to a main controller 41 described later.
Is input to the control unit 45.

The discharge port 19 is provided with a discharge lever 32 which is opened when unloading the petroleum products stored in the hatch portion 8.
have. The discharge port 19 has, similarly to the bottom valve 17 of the hatch portion 8, a discharge valve 33 driven by air from an air tank, for example, when the solenoid valve is opened and closed.

The discharge valve 33 is locked in a normal state, and is controlled by a control unit 45 of the main controller 41 described later.
The lock is released when a discharge valve drive signal S9 of "open" is input from. The discharge lever 32 is operated by operating the discharge lever 32 in a state where the lock of the discharge valve 33 is released.
By opening 3, petroleum products are discharged from the discharge port 19.

The discharge lever 32 is provided with an open / close detector 36 for converting an air signal into a contact signal in accordance with the operation of the discharge lever 32, for example, similarly to the air switch 13 described above. The contact signal S by the open / close detector 36
10 is input to the control unit 45 of the main controller 41 described later as a signal indicating the open / closed state of the discharge valve 33.

Each discharge port 19 is provided with an unloading hose connection detector 34. Unloading hose connection detector 34
Is for detecting the connection of the unloading hose 35 to the discharge port 19, and is constituted by, for example, the above-described air switch. The unloading hose 35 is connected to the discharge port 19, and the flow path of the air switch is cut off. Detects that the unloading hose 35 is connected to the discharge port 19, and outputs an unloading hose connection signal S11. Then, the unloading hose connection signal S11 at this time is input to the control unit 45 of the main controller 41 described later.

The tank lorry 2 has a main controller 4 as a control device for controlling the processing of receiving and unloading petroleum products and executing the processing described later.
Equipped with one. The main controller 41 is shown in FIG.
And a power supply unit 4 inside.
3, a receiving unit 44 and a control unit 45.

The operation panel 42 includes an operation section 46 and a display section 4.
7 is provided. The operation unit 46 is composed of, for example, a key switch, and includes an unloading switch 46a, an unloading switch 46b, an oil type confirmation switch 46c, an emergency stop switch 46d, an intermediate gate valve open switch 46e, and an intermediate gate valve close switch 46f. The signal when the button is pressed is input to the control unit 45 as switch information.

As the unloading switch 46a, only the switch where the unloading possible display section 47d described later is lit is valid. When the unloading switch 46a is pressed, an unloading signal is input to the control unit 45. Note that when the unloading switch 46a at the location where the unloading-possible display section 47d is turned off is depressed, it becomes invalid.

The unloading off switch 46b is a switch for stopping unloading of petroleum products from the hatch portion 8.
When the button is pressed, the unloading of the corresponding hatch portion 8 stops.

The oil type confirmation switch 46c is a switch for displaying the oil type loaded on the hatch portion 8 or the oil type loaded last time on an oil type confirmation display portion 47h described later.

The emergency stop switch 46d is a switch for forcibly stopping unloading. When pressed, the bottom valve 17 of the tank truck 3 closes and the unloading is forcibly stopped.

The intermediate gate valve open switch 46e is a switch that is effective only when the petroleum products unloaded from the front hatch 8A and the rear hatch 8B are of the same oil type. The intermediate gate valve 20 can be opened by operating the opening / closing lever.

When the intermediate gate valve closing switch 46f is depressed, the intermediate gate valve 20 can be closed by operating the opening / closing lever.

The display section 47 is composed of, for example, an LED lamp, and includes a hatch number display section 47a and a residual oil display section 4.
7b, degassing display part 47c, unloading possible display part 47d,
It has an unloading amount display section 47e, a tank full display section 47f, an NG display section 47g, and an oil type confirmation display section 47h.

The hatch number display section 47a performs display according to the hatch number of the hatch section 8 of the tank truck 3.

The residual oil indicator 47b is turned on when fats and oils remain in the hatch 8 of the tank truck 3 when receiving cargo.

The gas release indicator 47c indicates that gas has been released when the last petroleum product stored in the hatch 8 was high-volume gasoline or normal gasoline and kerosene was received in the hatch 8 this time. Lights when not in operation.

When unloading petroleum products to the gas station 4, the unloading possible display section 47d lights the position where all unloading conditions correspond to the OK hatch number position.

The unloading amount display section 47e digitally displays the unloading amount of the front system hatch portion 8A and the unloading amount of the rear system hatch portion 8B separately.

The tank full indicator 47f indicates that the underground tank 5 is full when the oil level signal S8 input to the controller 45 via the transmitter 54 from the tank oil level gauge 53 described later in the underground tank 5 is interrupted. Lights when the button is on.

The NG display section 47g is turned on when the connection order of the unloading hose 35 is incorrect or when the connection is poor.

When the oil type confirmation switch 46c is depressed, the oil type confirmation display section 47h illuminates a portion indicating the petroleum product loaded in the hatch portion 8 or the petroleum product previously loaded.

The receiving section 44 is provided with an unloading hose connection signal S13 for oil type and an oil level signal S1 from the transmission device 54 described later.
4 has been received. The signal received by the receiving unit 44 is
After being converted into a signal that can be processed by the control unit 45, the control unit 4
5 is input.

The control unit 45 is composed of, for example, a microcomputer, and includes an oil type signal S1 from the oil type valve key box 9, a flow rate signal S2 from the flow meters 21 and 22, and contacts from the open / close detectors 29, 36 and 37. Signals S3, S7, S1
0, a gas release signal S6 from the gas release valve key 27,
An oil level signal S8 from the oil level gauge 31 in the hatch, an unloading hose connection signal S11 from the unloading hose connection detector 34, an oil type unloading hose connection signal S13 received by the receiving unit 44 from the transmitting device 54 described later, and With the oil level signal S14 and the signal from the operation unit 46 as inputs, the processing at the time of receiving or unloading according to the flowcharts shown in FIGS.

As a specific process, the control unit 45
At the time of receiving or unloading, each valve (bottom valve 17,
The open / close state of the intermediate gate valve 20 and the discharge valve 33) is determined. Then, when the bottom valve 17 of the hatch portion 8 is determined to be “open”, the bottom valve drive signal S4 of “closed” is output to the corresponding bottom valve opening / closing motor 24 of the hatch portion 8. When the intermediate gate valve 20 is determined to be "open", the "closed" intermediate gate valve drive signal S1
2 is output to the intermediate gate valve 20. When it is determined that the discharge valve 33 is “open”, a “closed” discharge valve drive signal S9 is output to the corresponding discharge valve 33.

The control unit 45 executes the following processing when receiving a cargo. When it is determined that all the valves, that is, the bottom valve 17, the intermediate gate valve 20, and the discharge valve 33 of each hatch section 8 are closed, the oil level signal S from the oil level meter 31 in the hatch is determined.
8, the presence or absence of residual oil in each hatch 8 is determined.

The previous oil type signal and the current oil type signal are stored, the previous oil type and the current oil type are compared and collated, and the necessity of degassing is determined based on the comparison and collation result. When the determination is made, and when it is determined that degassing is necessary, an alarm command is output to perform degassing work.

The oil level signal S8 from the in-hatch oil level gauge 31 is input to determine whether or not the oil amount in the hatch portion 8 is full. If it is determined that the oil level is full, the receiving of the cargo is stopped. The alarm command is output as follows. After the completion of the receiving, the oil type information is updated, and various displays are performed on the display unit 47 in accordance with the updated oil type information.

The control unit 45 executes the following processing at the time of unloading. An unloading hose connection signal S11 from the unloading hose connection detector 34 and a transmitting device 54 described later.
, The connection state of the unloading hose 35 is determined whether or not the connection state of the unloading hose 35 is normal. In addition, unloading hose connection signal S1
3 recognizes the oil type of the petroleum product in the oil supply port 51 to which the unloading hose 35 is connected.

The oil level signal S1 from the transmitting device 54 described later
4 is used to determine whether the currently unloaded underground tank 5 is full or not.
When the input of the oil level signal S14 from 4 is interrupted and it is determined that the tank is full, an alarm command is output to stop unloading.

The gas station 4 has an underground tank 5 for each type of petroleum product. In the example of FIG. 1, four types of petroleum products to be handled are high-grade gasoline, general-purpose gasoline, light oil, and kerosene, so that four underground tanks 5a, 5b, 5c, and 5 are used.
d. Each underground tank 5 has a fuel supply port 51. The unloading hose 35 is detachably connected to the refueling port 51 between the refueling port 51 and the discharge port 19 of the tank truck 3 when unloading petroleum products.

Each oil supply port 51 is provided with an oil-specific unloading hose connection detector 52 having a mechanical system structure. The oil-specific unloading hose connection detector 52 is configured to convert, for example, an air signal into a contact signal. As a specific example, a sensing portion provided at each refueling port 51 to which the unloading hose 35 is connected and a cable connected to the sensing piece constitute a sensing portion, and each cable is connected to each contact of the switch box. Connected to. In this configuration, when one end of the unloading hose 35 is connected to the discharge port 19 and the other end is connected to the refueling port 51, the tip of the unloading hose 35 operates the sensing piece,
With the operation of the sensing piece, the cable is pulled to close the contact in the switch box, and the oil type and the unloading hose 35
Is connected to the transmission device 54 described later, indicating that the oil is properly connected.

In each underground tank 5 at the gas station 4,
A tank oil level gauge 53 is provided as oil level measuring means. The tank oil level gauge 53 measures the oil level and the volume of petroleum products supplied into the underground tank 5, and includes, for example, an optical sensor and a float, like the oil level gauge 31 in the hatch. Is done. The oil level signal S14 obtained by the measurement of the tank oil level gauge 53 is transmitted to the transmitting device
4 is input.

The oil-specific unloading hose connection detectors 52 are individually connected to the transmitting device 54 via signal lines. The transmitting device 54 is connected to the main controller 41 wirelessly or by wire, and the unloading hose connection signal S13 individually input from the unloading hose connection detector 52 for oil, the tank oil level gauge 53 Is converted into a weak radio wave and transmitted to the main controller 41 of the tank lorry 3.

In the fueling station 4, one of the oil supply ports 51 of the underground tank 5 provided for each type of petroleum product and one of the discharge ports provided at the end of the common piping section 18 of the tank truck 3. 19 and connected with the unloading hose 35,
By opening the discharge lever 32 of the discharge port 19 with the bottom valve 17 of the hatch portion 8 opened, the hatch portion 8 is opened.
The petroleum products led to the common piping section 18 are supplied to the underground tank 5.

Next, a procedure for receiving and unloading petroleum products by the above oil feed system will be described with reference to the flowcharts of FIGS. Note that the determination process in each flowchart is performed by the control unit 45 of the main controller 41. Also, in the flowchart, T.P. R is a tank truck, L. A is a loading arm; S is a gas station (service station),
M. C indicates a main controller.

First, in the overall flow shown in FIG. 5, if the operation is a receiving operation (ST1-Yes), the process proceeds to the receiving operation shown in FIG. 6 (ST2). Instead of receiving goods (ST
1-No), if it is unloading work (ST3-Yes),
The process proceeds to the unloading operation shown in FIG. 10 (ST4).

When receiving petroleum products, the receiving operation shown in FIGS. 6 to 9 is performed. First, the main switch is switched from the "OFF" state to the "shipping" state (ST1).
1) When the power is turned on (ST12), the operation panel 42
The lamp check of the display unit 47 is performed at (ST)
13), the process proceeds to an initial state check shown in FIG. 7 (ST1).
4).

In the initial state confirmation, first, it is determined whether or not the bottom valves 17 of all the hatch portions 8 of the tank truck 2 are in the "closed" state. Here, even one bottom valve 17 is "open"
If the bottom valve 17 is not in the "closed" state (ST21-No), the bottom valve 17 in the "open" state is set to the "closed" state (ST22).

If all the bottom valves 17 are in the "closed" state (S
T21-Yes), the intermediate gate valve 2 of the tank truck 2
It is determined whether 0 is in the "closed" state. Here, if the intermediate gate valve 20 is not in the "closed" state (ST23-N
o), the intermediate gate valve 20 is set to the "closed" state (ST2).
4).

Next, if the intermediate gate valve 20 is in the "closed" state (ST23-Yes), it is determined whether or not all the discharge valves 33 of the tank truck 2 are in the "closed" state. Here, if at least one of the discharge valves 33 is in the “open” state and all the discharge valves 33 are not in the “closed” state (ST25-No),
The discharge valve 33 in the “open” state is set to the “closed” state (ST
26). In addition, even if a predetermined time has passed, if any valve remains in the “open” state, an alarm is output.

Next, if all the discharge valves 33 are in the "closed" state (ST25-Yes), it is determined whether or not there is residual oil in each hatch 8 of the tank truck 2. Here, if there is any residual oil in the hatch portion 8 (ST27-No),
A residual oil alarm is output (ST28), and a residual oil treatment operation is performed (ST29).

When the initial state check (ST14) is completed, the "closed" state of the bottom valve 17, the intermediate gate valve 20, and the discharge valve 33 of all the hatch portions 8 of the tank truck 2 is checked (S14).
T15). This confirmation operation is performed by looking at the lit lamp of the display unit 47. Thereafter, the process shifts to the individual hatch receiving work shown in FIGS. 8 and 9 (ST16).

In the individual hatch receiving operation, first, the oil type key 7 of the loading arm is inserted into the oil type valve key 10 of the oil type valve key box 9 of the tank truck 2 (ST31). And the inserted oil type key 7
When the key operation of the cylinder lock of the oil type valve key 10 and the key operation of the oil type valve key 10 coincide with each other, the oil type signal S
1 is output, and the oil type signal S1 is received by the receiving unit 44 of the main controller 41 (ST32).

Next, it is determined whether or not degassing is necessary. Here, if degassing is not necessary (ST33-N
o), the bottom valve opening / closing handle 23 of the hatch portion 8 is unlocked (ST34). On the other hand, if degassing is required (ST33-Yes) and there is no degassing signal S6 (ST35-No), a degassing alarm is output (ST3).
6). Thereafter, a degassing operation is performed (ST37). ST
In 35, if there is a gas release signal S6 (ST35-
Yes), the bottom valve opening / closing handle 23 of the hatch portion 8 is unlocked (ST34).

When the lock of the bottom valve opening / closing handle 23 of the hatch portion 8 is released (ST34), the manhole cover 26 is opened by operating the bottom valve opening / closing handle 23 of the hatch portion 8 of the tank truck 2, and the loading hose 6 is opened. It is inserted into the lubrication port 25, and the discharge valve of the loading arm is opened to start the load receiving operation (ST38).

Then, during the receiving operation, the capacity in the hatch 8 is determined to be full based on the oil level signal S8 from the oil level gauge 31 in the hatch (ST39-Yes), and an alarm is output (ST40). Then, the discharge valve of the loading arm is switched to "closed" to stop receiving the cargo (ST41), stop the output of the alarm, and perform the reset process (ST42).

During the receiving operation, it is determined that the capacity in the hatch portion 8 is not full (ST39-No), and if the receiving of the predetermined amount is not completed (ST43-No), the receiving operation is continued and the predetermined amount is continued. Is completed (ST43-
Yes), the discharge valve of the loading arm is switched to "closed", the load receiving hose 6 is pulled out from the lubrication port 25, the manhole cover 26 is closed, and the bottom valve opening / closing handle 23 of the hatch 8 is closed (ST44). Then, the oil type key 7 of the loading arm is extracted from the oil type valve key 10 of the oil type valve key box 9 of the tank truck 2 (ST4).
5).

Thereafter, the control unit 45 updates the oil type information (ST46) and outputs an oil type display to the display unit 47 (ST4).
7) The bottom valve opening / closing handle 23 of the hatch portion 8 is locked (ST48). Thus, the receiving operation is completed.

When the receiving operation is completed, the main switch is switched from "receiving" to "OFF" (ST17). As a result, the delay timer is turned on (ST18), and FIG.
After the initial state confirmation work (ST14) is performed again,
The delay timer is turned off, and the power is automatically turned off (ST19).

Next, when unloading petroleum products, the unloading operation shown in FIGS. 10 to 13 is executed. First, the main switch is switched from "OFF" to "unloading" (ST51). When the power is turned on (ST52), each lamp check of the display unit 47 on the operation panel 42 is performed (ST53). Move to the confirmation of initial state shown.

In the initial state confirmation, first, it is determined whether or not the bottom valves 17 of all the hatch portions 8 of the tank truck 2 are in the “closed” state. Here, even one bottom valve 17 is "open"
If all the bottom valves 17 are not in the "closed" state (ST61-No), the bottom valve 17 in the "open" state is brought into the "closed" state (ST62).

If all the bottom valves 17 are in the "closed" state (S
T61-Yes), the intermediate gate valve 2 of the tank truck 2
It is determined whether 0 is in the "closed" state. Here, if the intermediate gate valve 20 is not in the "closed" state (ST63-N
o), the intermediate gate valve 20 is set to the "closed" state (ST6).
4).

Next, if the intermediate gate valve 20 is in the "closed" state (ST63-Yes), it is determined whether or not all the discharge valves 33 of the tank truck 2 are in the "closed" state. Here, at least one of the discharge valves 33 is in the “open” state, and all the discharge ports 19 are not in the “closed” state (ST65-No).
The discharge valve 33 in the “open” state is set to the “closed” state (ST
66). In addition, even if a predetermined time has passed, if any valve remains in the “open” state, an alarm is output.

When the initial state check (ST54) is completed, the process shifts to the individual tank unloading operation shown in FIGS. 12 and 13 (ST55).

In the individual tank unloading operation, first, one end of the unloading hose 35 is connected to the tank truck 2 (S
T71). Thereby, the unloading hose connection signal S11 of the tank truck 2 is input to the main controller 41 (ST72). Next, the other end of the unloading hose 35 is connected to the refueling port 51 of the underground tank 5 of the unloading gas station 4 (ST73). Thereby, the oil-specific unloading hose connection signal S13 is input to the transmission device 54, and the transmission device 54
Transmission of the unloading hose connection signal S13 of the oil type and the oil level signal S14 of the tank oil level gauge 53 is started (ST7).
4).

Then, the receiving section 44 of the main controller 41 determines the oil type unloading hose connection signal S13 received, and if the hose connection is not determined to be OK (ST7).
5-No), an alarm is output (ST76), and a reset process is performed (ST77). Here, while the hose connection is determined to be OK (ST75-Yes), if the intermediate gate valve 20 is not determined to be OK (ST78-No), an alarm is output (ST76) and reset processing is performed (ST77). .
On the other hand, the hose connection is determined to be OK (ST75-
(Yes), and when it is determined that the intermediate gate valve 20 is also OK (ST76-Yes), the lamp of the unloadable display portion 47d of the hatch number that can be unloaded is turned on (ST7).
9).

Then, with the lamp of the unloading possible display section 47d being lit, the unloading switch 46a is set to "O".
N "(ST80), when the hatch portion 8 is selected, the bottom valve 17 and the discharge valve 33 of the selected hatch portion 8 become" open "(ST81), and unloading is started.

When the unloading of the petroleum product is started, the flow rate of the unloaded petroleum product is digitally displayed on the unloading amount display section 47e (ST82). Then, during unloading of the petroleum product, it is first determined whether or not the unloaded underground tank 5 is full.

Then, the oil level signal S1 from the transmitting device 54
4 is cut off and when it is determined that the underground tank 5 is full (ST83-Yes), an alarm is output (S83).
T84). Then, the bottom valve 17 and the discharge valve 3 of the hatch portion 8
3 is set to "closed" and unloading is stopped (ST85). Thereafter, a reset process is performed (ST86), and the process returns to the original state. On the other hand, if oil level signal S14 from transmitting device 54 is continuously input and it is determined that underground tank 5 is not full (ST83-No), it is determined whether the hose connection is OK. .

If it is determined that the hose connection is not OK (ST87-No), an alarm is output (ST8).
4) The bottom valve 17 and the discharge valve 33 of the hatch portion 8 currently unloaded are closed, and unloading is stopped (ST8).
5). Thereafter, a reset process is performed (ST86), and the process returns to the original state. On the other hand, if the hose connection is determined to be OK (ST87-Yes), the emergency stop switch 46d is turned on.
A determination is made as to whether or not it has been done.

When it is determined that the emergency stop switch 46d has been turned on (ST88-Yes), an alarm is output (ST84), and the bottom valve 17 and the discharge valve 33 of the hatch portion 8 currently unloaded are set to ""Closed" and unloading is stopped (ST85). Thereafter, reset processing is performed (ST8).
6) Return to the original. On the other hand, the emergency stop switch 46d
Is determined not to be ON (ST88-No),
It is determined whether the unloading of the predetermined amount has been completed.

When it is determined that the unloading of a predetermined amount has been completed (ST89-Yes), the bottom valve 17 and the discharge valve 33 of the hatch portion 8 currently unloaded are closed.
Unloading is stopped (ST90). On the other hand, if it is determined that the unloading of the predetermined amount has not been completed (ST89-N
o), it is determined whether or not the unloading switch 46b is turned on.

When it is determined that the unloading off switch 46b has been turned on (ST91-Yes), the bottom valve 17 and the discharge valve 33 of the hatch 8 currently unloaded are closed.
And unloading is stopped (ST90). On the other hand, when it is determined that the unloading switch 46b is not ON (ST91-No), the operation returns to ST83 and ST83 is performed.
The following processing is executed. Thus, the unloading operation ends.

When the unloading operation is completed, the main switch is switched from "unloading" to "OFF" (ST56). As a result, the delay timer is turned on (ST57), and FIG.
After the initial state confirmation work (ST54) of Step 1 is executed again, the delay timer is turned off and the power supply is automatically turned off.
(ST58).

As described above, according to the above-described embodiment, all the valves of the tank truck 2 can be used for receiving and unloading.
That is, the bottom valve 17, the intermediate gate valve 20 of each hatch portion 8,
Since the open / close state of the discharge valve 33 is detected and the valve in the open state is automatically driven to close, it is possible to prevent oil mixing with the previously unloaded petroleum product and oil leakage of the petroleum product.
In addition, since this operation is also performed after receiving or unloading, the open / close state of each valve can be monitored twice to prevent oil mixture and oil leakage of petroleum products.

At the time of receiving the cargo, after checking the closed state of all the valves, the presence or absence of residual oil in each hatch portion 8 is detected. If there is residual oil, an alarm is issued to prompt the residual oil processing. Therefore, when a new petroleum product is received, it is possible to prevent oil products of different oil types from being supplied to the previous petroleum product and to prevent oil mixing.

At the time of receiving the cargo, the oil type valve key 10
And the oil type of the oil product of the last received is compared with the oil type of the petroleum product received this time. Thus, when the oil type of the oil type signal at the time of receiving the cargo this time is kerosene, it is determined that degassing processing is necessary. Then, when it is determined that the degassing process is necessary, if the degassing signal S6 is not input from the degassing valve key 27, an alarm prompting the degassing process is output. Explosion due to kerosene oil mixture can be prevented.

At the time of unloading, the tank truck 2
The connection state of the unloading hose 35 connected between the discharge port 19 of the gas station 4 and the refueling port 51 of the underground tank 5 of the gas station 4 is detected. Leakage can be prevented.

At the time of unloading, the oil level in the underground tank 5 is detected.
Transmitted from the receiving unit 44 of the main controller 41
The tank truck 2 monitors the capacity of the underground tank 5 that has been received and currently unloaded, so that the capacity of the underground tank 5 is full, and the underground tank 5 is replenished more than necessary with petroleum products. Can be prevented from overflowing outside.

In this embodiment, an unloading hose connection detector 52 is provided at each refueling port 51 of the underground tank 5, and a signal indicating whether or not the unloading hose 35 is connected to each refueling port 51 is transmitted by the transmitting device 54. Can be transmitted to the main controller 41 via the. As a result, there is no need to wind a coil around an unloading hose connecting between the discharge port of a tank truck and the refueling port of the underground tank, as in the conventional method, and to take out a plurality of signals for each refueling port. A normal hose can be used as the hose.

The transmitting device 54 is connected to the main controller 41
In this configuration, the power can be supplied from the power supply unit 43 of the main controller 41, and there is no need to separately provide a power supply for the transmitting device 54, and the configuration can be simplified.

In the above-described embodiment, the tank lorry 2 has two discharge ports 19 and the intermediate gate valve 20 disposed between the discharge ports 19, 19. May be omitted and one discharge port 19 may be provided so as to be commonly used for each hatch portion 8. Also,
In the tank lorry 2, the tank portion 3 is constituted by seven hatch portions 8a to 8g, but it is sufficient that at least one hatch portion 8 is provided.

[0111]

As is apparent from the above description, according to the present invention, the workability is improved and the receiving and unloading of petroleum products can be performed safely as compared with the conventional oil feeding system.

According to the first aspect of the present invention, at the time of unloading and unloading, the open / close state of each valve of the tank truck is detected, and the open valve is automatically driven to close. Oil mixture with previously unloaded petroleum products,
And oil leakage of petroleum products can be prevented.

According to the second aspect of the present invention, at the time of unloading, the presence or absence of residual oil in each hatch portion is detected in a state where all valves are in a closed state. Since an alarm is output so as to prompt the processing, when a new petroleum product is received, it is possible to prevent the oil product of a different oil type from being supplied to the previous petroleum product and to prevent oil mixing.

According to the third aspect of the present invention, at the time of loading, the oil type signal from the oil type signal generating device is input, and the oil type of the previously received petroleum product and the oil type of the currently received petroleum product are received. It is determined that the degassing process is necessary when the oil type of the oil type signal at the time of previous reception is high-volume gasoline or general-purpose gasoline and the oil type of the oil type signal at this time of reception is kerosene. . When it is determined that the gas venting process is necessary, if a gas venting signal is not input from the gas venting signal generator, an alarm prompting the gas venting process is output. Explosion due to kerosene oil mixture can be prevented.

According to the oil feeding system of the fourth aspect, at the time of unloading, the oil level in the tank is detected, and the detected oil level signal is transmitted from the transmitting device, received by the control device, and currently unloaded. The tank lorry vehicle monitors the tank capacity being filled, so that the tank capacity becomes full and it is possible to prevent oil products from being refueled more than necessary and overflowing the tank.

According to the fifth aspect of the present invention, the unloading hose connection detecting means is provided at each refueling port of the gas station, and a signal indicating whether or not the unloading hose is connected is transmitted to the transmitting device at each refueling port. Is transmitted to the control device via a coil, which is wound around an unloading hose connecting the discharge port of the tank truck and the refueling port of the underground tank, as is conventionally done, and outputs multiple signals for each refueling port. There is no need to take out, and a normal hose can be used for the unloading hose.

In the configuration in which the transmitting device is connected to the control device by wire, power can be supplied from the power supply unit of the control device, and there is no need to separately provide a power source for the transmitting device.
The configuration can be simplified.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of an oil feeding system according to the present invention.

FIG. 2 is a schematic diagram of a tank truck applied to the oil supply system.

FIG. 3 is a configuration diagram of an oil type valve key box mounted on a tank truck in the oil feeding system.

FIG. 4 is a diagram showing a configuration example of an operation panel of a main controller mounted on a tank truck in the oil supply system.

FIG. 5 is a flowchart showing the overall operation of the oil supply system.

FIG. 6 is a flowchart showing an overall operation of a cargo receiving operation by the oil feeding system.

FIG. 7 is a flowchart for confirming an initial state in a receiving operation.

FIG. 8 is a flowchart of an individual hatch receiving operation in the receiving operation.

FIG. 9 is a flowchart of the individual hatch receiving operation following FIG. 8;

FIG. 10 is a flowchart showing an entire unloading operation by the oil supply system.

FIG. 11 is a flowchart of an initial state check in an unloading operation.

FIG. 12 is a flowchart of an unloading operation of an individual hatch in an unloading operation.

FIG. 13 is a flowchart of the unloading operation of the individual hatch following FIG.

[Explanation of symbols]

1 ... oil tank station, 2 ... tank truck, 4 ... gas station, 5 ...
Underground tank, 6 ... loading hose, 7 ... oil type key, 8 ... hatch, 10 ... oil type valve key (oil type signal generator),
17: bottom valve, 18: common piping section, 19: discharge port, 27 ...
Gas release valve key (gas release signal generator), 29, 3
6, 37: open / close detector, 31: oil level gauge in the hatch (oil level measuring means), 34: unloading hose connection detector (unloading hose connection detecting means), 35: unloading hose, 41: main controller ( Control device), 45: control unit, 51: refueling port, 52: oil-specific unloading hose connection detector (oil-specific unloading hose connection detecting means), 53: tank oil level gauge (oil level measuring means), 54 ... Transmitter.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masatoshi Matsuura 3-1-1-12 Shiba, Minato-ku, Tokyo Miwa Rock Co., Ltd. (72) Inventor Kazunori Miyamoto 3-1-1-12 Shiba, Minato-ku, Tokyo Miwa Lock Co., Ltd. (72) Inventor Nobuyuki Kuzui 3-1-1, Shiba, Minato-ku, Tokyo Miwa Lock Co., Ltd.

Claims (6)

[Claims] 1. A petroleum product stored in an oil depot is refueled to a hatch portion of a tank truck by oil type and received, and the received petroleum product in the hatch portion is refueled to a tank of a refueling station for each oil type. In the unloading oil feeding system, the tank truck has a bottom valve in the hatch,
The bottom valve is connected to a discharge port having a discharge valve via a pipe, and an open / close detector for detecting the open / close state of the bottom valve and the discharge valve via a mechanical system structure; and a detection of the open / close detector. An oil feeding system comprising: a control device that determines an open / closed state of the bottom valve and the discharge valve based on a signal, and closes and drives the valve determined to be open. 2. An oil level measuring means for measuring an oil level in the hatch portion, wherein the control device determines the presence or absence of residual oil in the hatch portion based on a measurement result of the oil level measuring device, 2. The oil feed system according to claim 1, wherein when it is determined that there is residual oil in the hatch portion, an alarm prompting a residual oil treatment is output. 3. A petroleum product stored in an oil depot is refueled to a hatch portion of a tank truck by oil type and received, and the received petroleum product in the hatch portion is refueled to a tank of a refueling station for each oil type. In the unloading oil delivery system, the oil tank station is provided with an oil type key indicating the type of oil product for each supply means for supplying the oil product to the hatch portion, and the tank truck has the oil An oil type signal generator that generates an oil type signal indicating the type of oil when the type key and the oil type information match, and a gas release signal that generates a gas release signal when performing gas release processing in the hatch portion A generator and an oil type signal from the oil type signal generator as an input,
When the oil type of the oil type signal at the time of receiving the previous time is high-volume gasoline or general-purpose gasoline and the oil type of the oil type signal at the time of receiving this time is kerosene, it is determined that the degassing process is necessary, An oil feeding system, comprising: a control device that outputs an alarm prompting the degassing process when it is determined that the degassing process is necessary and a degassing signal is not input from the degassing signal generator. 4. A petroleum product stored in an oil depot is refueled to a hatch portion of a tank truck by oil type, received and received, and the received petroleum product in the hatch portion is refueled to a refueling tank for each oil type. In the unloading oil feed system, the gas station includes an oil level measurement unit that measures an oil level in the tank and outputs an oil level signal, and a transmission device that transmits an oil level signal of the oil level measurement unit. The tank truck has a bottom valve in the hatch portion,
The bottom valve is connected to a discharge port having a discharge valve via a pipe, and receives an oil level signal transmitted from the transmission device when unloading the petroleum product, and determines whether the tank is full. A control device that outputs a warning when it is determined that the inside of the tank is full and closes the bottom valve and the discharge valve of the hatch portion to stop unloading. system. 5. An unloading hose connection detecting means for detecting whether or not an unloading hose is connected to the discharge port is provided at the discharge port, and at each refueling port of the refueling station, Oil-specific unloading hose connection detecting means for detecting the presence / absence of connection of an unloading hose is provided. The control device transmits a signal indicating whether or not the unloading hose is connected based on the detection signal from the unloading hose connection detecting means on the discharge port side and the signal transmitted from the transmitting device. It is determined whether or not the unloading hose is normally connected between the discharge port and the refueling port, and the type of oil in the tank of the refueling port to which the unloading hose is connected is recognized. Claim 4 The described oil feed system. 6. The transmission device is connected to the control device by wire or wirelessly, and transmits the oil level signal of the oil level measurement means and the oil type unloading connection signal to the control device. The described oil feed system.