JP3329190B2 - Tank lorry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry for supplying fuel oil to an oil storage tank of a service station for handling vehicle fuel, and more particularly to an improvement in a tank lorry having a vapor recovery function.

[0002]

2. Description of the Related Art A technique for collecting vapor discharged from an oil storage tank into a tank of a tank lorry when fuel oil is supplied from a tank lorry to an oil storage tank is known, for example, from Japanese Patent Application Laid-Open No. 5-253698. Also in this technique, unloading is performed by connecting the air vent of the oil storage tank and the ventilation pipe of the tank lorry with a vapor recovery hose, and connecting the discharge pipe of the tank lorry and the oil supply pipe of the oil storage tank with an oil supply hose. A connection sensor is provided in the coupling for connecting the vapor recovery hose and the lubrication hose, and unloading is permitted while both sensors are detecting the connection.

[0003] By the way, there are gas stations where vapor recovery equipment is not installed, and it is impossible to unload such gas stations with the above-mentioned tank truck. Also, in such a gas station without connecting the vapor recovery hose,
That is, if the tank is forcibly unloaded in a sealed state, the tank will be under negative pressure as the tank is unloaded, and the tank will be damaged.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention is to provide a tank lorry which can be unloaded not only at a gas station where vapor recovery equipment is installed but also at a gas station where these equipments are not installed. is there.

[0005]

In order to achieve the above object, according to the present invention, each hatch is connected to a discharge pipe via a bottom valve, and a lubrication hose connection sensor is connected to a coupling provided at a tip of the discharge pipe. , Each hatch is connected to a vent pipe via a vent valve, the vent pipe is branched into two, an atmospheric valve is provided at the tip of one branch pipe, and a coupling and a vapor are provided at the tip of the other branch pipe. A recovery hose connection sensor is provided, a control device that receives a signal from each of the connection sensors and the keyboard, and outputs an open / close signal of each valve, and a control unit of the control device includes:
An unloading permitting means that receives a connection signal from the lubrication hose connection sensor and a hatch designation signal from the keyboard and outputs a signal to open the designated bottom valve and vent valve of the hatch, and from the vapor recovery hose connection sensor when unloading is permitted. Tank opening means for outputting a valve opening signal of the atmospheric valve when the connection signal is not input.

The unloading permission means receives a tank designation signal from the keyboard at the end of unloading and outputs a close signal to the bottom valve and the vent valve, and the tank open means outputs a close signal to the atmosphere valve. Therefore, the valve is automatically closed at the end of unloading. Further, since each of the valves is controlled to be opened and closed by air, inexpensive explosion-proof equipment can be used, and driving can be ensured.

[0007]

Embodiments of the present invention will be described below. As shown in FIG. 1, the tank 2 of the tank lorry 1 is divided into a plurality of hatches 3, 3,..., And each hatch 3 is connected via a bottom valve 4 to a discharge pipe 5 common to each hatch. A coupling 7 is attached to the end of the coupling 5 via a manual valve 6. The coupling 7 is provided with an oiling hose connection / disconnection sensor 8 for detecting connection / disconnection of an oiling hose 36 described later.

The upper part of each hatch 3 is connected to a common vent pipe 10 for each hatch 3 via a vent valve 9. The vent pipe 10 is branched into two pipes. One end of one pipe 10A communicates with the atmosphere via an atmosphere valve 11, and the other end of the pipe 10B is provided with a coupling 12 with an automatic open / close valve. . The coupling 12 is provided with a vapor recovery hose connection / disconnection sensor 13 for detecting connection / disconnection of a vapor recovery hose 35 described later.

FIG. 2 shows a control device 14 which receives signals from the sensors 8 and 13 and outputs opening / closing control signals for the valves 4, 4,..., 9, 9,. As shown, a hatch designation key 15 for designating a hatch, an unloading key 16 for instructing start of unloading, a keyboard 18 having an end key 17 for instructing end of unloading, and a display 19 for displaying various data Is provided.

On the other hand, the lubrication pipe 3 of the oil storage tank 30 of the gas station
Couplings 33 and 34 are provided at the tip of 1 and in the middle of the air vent 32, respectively. Then, the coupling 34 in the middle of the air vent 32 and the coupling 12 of the vent pipe 10 of the tank lorry 1 are connected by a vapor recovery hose 35, and the coupling 33 of the lubrication pipe 31 and the coupling of the discharge pipe 5 of the tank lorry 1. 7 is connected by an oiling hose 36 for unloading.

As shown in the control system of FIG. 2, the valves 4, 4,..., 9, 9,. It is connected to an air source 23. Signals from the keyboard 18 and the sensors 8 and 13 are input to the control unit 24 of the control device 14, and signals are output to the electromagnetic valves 21, 21... I have.

The unloading permission means 25 of the control unit 24 receives the signals from the hatch designation key 15 and the unloading key 16 of the keyboard 18 and outputs the unloading permission signal if a connection signal is input from the lubrication hose connection sensor 8. Output. That is, a valve opening signal is sent to the solenoid valve 21 of the designated hatch 3, and the unloading data is displayed on the display 19. Then, when receiving signals from the hatch designation key 15 and the end key 17 of the keyboard 18, it outputs an unloading end signal. That is, a valve closing signal is sent to the solenoid valve 21 of the designated hatch 3, and the unloading end data is displayed on the display 19.

The tank opening means 26 of the control unit 24
When a connection signal is not input from the vapor recovery hose connection sensor 13 when the unloading is permitted, the valve outputs a valve opening signal to the solenoid valve 22 of the atmospheric valve 11. Then, when the unloading is completed, a valve closing signal is output to the electromagnetic valve 22 of the atmospheric valve 11.

Next, the operation will be described with reference to the flowchart of FIG.

When the coupling 34 of the air vent 32 and the coupling 12 of the ventilation pipe 10 are connected by a vapor recovery hose 35, the oil storage tank 30 at the gas station and the ventilation pipe 10 of the tank lorry 1 are connected, and a vapor recovery hose connection sensor is provided. From 13, a connection signal is input to the control unit 24 of the control device 14.

Next, when the coupling 33 of the oil supply pipe 31 and the coupling 7 of the discharge pipe 5 are connected by an oil supply hose 36, the oil storage tank 30 at the filling station and the discharge pipe 5 of the tank lorry 1 are communicated with each other. A connection signal is input from the connection sensor 8 to the control unit 24 of the control device 14.

After connecting the hoses 35 and 36 in this manner, the hatch 3 to be unloaded is designated by the hatch designation key 15 of the keyboard 18 (ST1 in FIG. 3), and the unloading key 16 is pressed (ST2 in FIG. 3). Since the connection signal has been input from the connection sensor 8 (ST3 in FIG. 3), the unloading permission means 25 sends a valve opening signal to the solenoid valve 21 of the designated hatch 3 and displays the unloading data on the display unit 19. (FIG. 3, ST4). Upon receiving the valve opening signal, the solenoid valve 21 opens, and the hatch 3 designated by the air pressure from the air source 23
Bottom valve 4 and vent valve 9 open. At this time, since the connection signal is input from the vapor recovery hose connection sensor 13 (ST5 in FIG. 3), the atmosphere valve 11 is not opened.

When the manual valve 6 is opened, unloading is started, and the oil in the hatch 3 is supplied to the oil storage tank 30 through the bottom valve 4, the discharge pipe 5, the lubrication hose 36 and the lubrication pipe 31. The vapor in the oil storage tank 30 includes an air vent 32, a vapor recovery hose 35, a ventilation pipe 10, and a ventilation valve 9.
Through the hatch 3.

When the unloading is completed, the manual valve 6 is closed,
When the hatch 3 to be ended is designated by the hatch designation key 15 of the keyboard 18 (ST6 in FIG. 3) and the end key 17 is pressed (ST7 in FIG. 3), the unloading permission means 25 closes the solenoid valve 21 of the designated hatch 3. The valve signal is sent, and the unloading end data is displayed on the display 19 (FIG. 3, ST8). Upon receiving the valve closing signal, the solenoid valve 21 is closed, and the bottom valve 4 and the ventilation valve 9 are closed.

To unload another hatch 3, the same operation as described above is repeated, and when all unloading is completed, the hoses 35 and 36 are removed and the vehicle is left.

In the above description, the unloading is performed at the gas station provided with the coupling 34 for connecting the vapor recovery hose 35 to the air vent 32 of the oil storage tank 30, but the gas station not provided with the coupling 34 is described. In this case, unloading is performed without connecting the vapor recovery hose 35.

In this case, the connection signal from the vapor recovery hose connection sensor 13 is transmitted to the controller 24 of the controller 14.
Has not been entered. Then, the user designates the hatch 3 from the keyboard 18 (ST1 in FIG. 3), presses the unloading key 16 (ST2 in FIG. 3), and receives a connection signal from the lubrication hose connection sensor 8 (ST3 in FIG. 3). Permits unloading, sends a valve opening signal to the solenoid valve 21 of the designated hatch 3, and displays the unloading data on the display 19 (FIG. 3).
ST4) At this time, since no connection signal has been input from the vapor recovery hose connection sensor 13, (FIG. 3 S
T5), the tank opening means 26 outputs a valve opening signal to the solenoid valve 22 (ST9 in FIG. 3), and the atmosphere valve 11 is opened. When the atmosphere valve 11 is opened, the atmosphere flows into the hatch 3 upon unloading, and the inside of the hatch 3 does not become negative pressure.
Unloading is performed smoothly.

When the hatch 3 is designated after the unloading is completed (ST6 in FIG. 3) and the end key 17 is pressed (ST7 in FIG. 3), the unloading permitting means 25 outputs a valve closing signal to the solenoid valve 21. Then, the tank opening means 26 outputs a valve closing signal to the solenoid valve 22 (ST8 in FIG. 3). Then, the atmosphere valve 11 is closed at the same time as the bottom valve 4 and the ventilation valve 9 are closed.

[0024]

As described above, according to the tank lorry of the present invention, each hatch is connected to the discharge pipe via the bottom valve, and the coupling provided at the tip of the discharge pipe is provided with a lubrication hose connection sensor. Is connected to a vent pipe via a vent valve, the vent pipe is branched into two, an atmospheric valve is provided at the tip of one branch pipe, and a coupling and a vapor recovery hose connection sensor are provided at the tip of the other branch pipe. A control device that receives signals from the connection sensors and the keyboard and outputs an opening / closing signal for each valve, and the control unit of the control device includes a connection signal from the lubrication hose connection sensor and a hatch designation from the keyboard. Unloading permission means for receiving the signal and outputting the specified hatch bottom valve and vent valve open signal, and opening the atmospheric valve when the unloading of the connection signal from the vapor recovery hose connection sensor at the time of unloading permission. Since the and a tank opening means for outputting the item, as well as gas stations that install equipment for vapor recovery, in which it is unloaded in these not install the equipment service stations.

[Brief description of the drawings]

FIG. 1 is an overall view of a tank truck of the present invention.

FIG. 2 is a block diagram showing a control system of the tank truck of the present invention.

FIG. 3 is a flowchart showing the operation of the tank truck of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank lorry 2 Tank 3 Hatch 4 Bottom valve 5 Discharge pipe 6 Manual valve 7, 12 Coupling 8 Lubrication hose connection / disconnection sensor 9 Vent valve 10 Vent pipe 11 Atmospheric valve 13 Vapor recovery hose connection / disconnection sensor 14 Control device 15 Hatch designation key 16 Unloading key 17 End key 18 Keyboard 19 Indicator 21, 22 Solenoid valve 23 Air source 24 Control unit 25 Unloading permission means 26 Tank opening means 30 Oil storage tank 31 Lubrication pipe 32 Air vent 33, 34 Coupling 35 Vapor recovery hose 36 Lubrication hose

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B67D 5/58

Claims (3)

(57) [Claims] 1. Connecting each hatch to a discharge pipe via a bottom valve, providing a lubrication hose connection sensor to a coupling provided at a tip of the discharge pipe, and connecting each hatch to a ventilation pipe via a ventilation valve. The vent pipe is branched into two pipes, an air valve is provided at the tip of one branch pipe, a coupling and a vapor recovery hose connection sensor are provided at the tip of the other branch pipe, and signals from the connection sensors and a keyboard are provided. And a control device for outputting an open / close signal of each valve is provided.
An unloading permitting means that receives a connection signal from the lubrication hose connection sensor and a hatch designation signal from the keyboard and outputs a signal to open the designated bottom valve and vent valve of the hatch, and from the vapor recovery hose connection sensor when unloading is permitted. A tank opening means for outputting a valve opening signal of the atmospheric valve when the connection signal is not inputted. 2. The unloading permitting means receives a tank designation signal from a keyboard at the end of unloading and outputs a valve closing signal to a bottom valve and a ventilation valve, and the tank opening means outputs a valve closing signal to an atmospheric valve. The tank lorry according to claim 1, wherein 3. The tank lorry according to claim 1, wherein each of the valves is controlled to open and close by air.