JP2017001535A - Liquid transportation vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid transportation vehicle capable of appropriately opening and closing shutoff valves on the basis of a user's will.SOLUTION: When an automatic button 201 or a semiautomatic button 202 is touch-operated on a function setting screen 200, either an automatic mode or a semiautomatic mode is selected. If the automatic mode is selected when a filling screen 300 is displayed on an operation panel 81, emergency shutoff valves 13 and 14 are automatically opened/closed on the basis of whether an opening permission flag 73a is ON or not, as a result of opening permission determination processing (S302). On the other hand, if the semiautomatic mode is selected, the emergency shutoff valves 13 and 14 are opened/closed on the basis of operation of an opening button 303 or a closing button 304 on the filling screen 300. Thus, an operator selects either the automatic mode or the semiautomatic mode according to circumstances and appropriately carry out filling work.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid transport vehicle, and more particularly to a liquid transport vehicle capable of suitably opening and closing a shut-off valve based on a user's intention.

  Patent Document 1 describes a bulk lorry (liquid transport vehicle) including an emergency shutoff valve (shutoff valve) whose opening and closing is controlled by a control device. In the bulk lorry, it is described that the emergency shut-off valve is automatically opened and closed by the control of the control device based on the interlock (opening of the valve instrument box door, the state of the parking brake, etc.). It is also described that a three-way switching valve having a mechanical configuration is also provided, and the emergency shut-off valve can be opened and closed manually by operating the three-way switching valve.

JP 2004-278676 A

  However, when the shut-off valve is automatically opened and closed based on the interlock, the shut-off valve may be opened or closed against the operator's intention. For example, if safety cannot be ensured only by interlock, there may be situations where the shutoff valve should be opened and closed based on the operator's judgment, but the operator's judgment cannot be intervened in automatic opening and closing by the control device . On the other hand, a mechanical configuration such as a three-way switching valve may be difficult to handle, and the shutoff valve may not be opened and closed in a timely manner. Therefore, there is a problem that the shutoff valve cannot be appropriately opened and closed based on the operator's intention.

  The present invention has been made to solve the above-described problems, and in particular, an object of the present invention is to provide a liquid transport vehicle capable of suitably opening and closing a shut-off valve based on the user's intention.

  In order to achieve this object, a liquid carrying vehicle of the present invention includes a vehicle body, a tank mounted on the vehicle body for loading liquid, a shut-off valve for blocking a flow path for discharging the liquid from the tank, and the vehicle body. Detection device for detecting the state of various devices mounted, control device for controlling opening / closing of the shutoff valve based on the detection result of the detection device, and input device for inputting information based on user operation to the control device The control device permits state acquisition means for acquiring the state detected by the detection device, and opens the shut-off valve based on the state acquired by the state acquisition means. Determining means for determining whether or not, an opening accepting means for accepting an instruction to open the shut-off valve based on a user operation on the input device, and a control mode of the shut-off valve. And a second mode that is different from the first mode based on a user operation on the input device, and the first mode is selected by the mode selection unit. In this case, when it is determined by the determining means that the opening of the shutoff valve is permitted, the shutoff valve is opened regardless of whether the opening accepting means has received an instruction to open the shutoff valve, When the second mode is selected by the mode selection means, an opening means for opening the shut-off valve when an instruction to open the shut-off valve is accepted by the open accepting means, and an opening of the shut-off valve by the judging means Is determined not to be permitted, regardless of whether the first mode or the second mode is selected by the mode selection means. Comprising a closure means for closing the valve, the.

  “Closed” means that the shutoff valve is closed to shut off the discharge of liquid from the tank to the flow path.

  According to the liquid transport vehicle of the first aspect, the following effects can be obtained. As the control mode of the shut-off valve, either the first mode or the second mode different from the first mode is selected by the mode selection means based on the user's operation on the input device. When the first mode is selected by the mode selection unit, the state of various devices mounted on the vehicle body of the liquid transport vehicle is detected by the detection device, and the detected state is acquired by the state acquisition unit. Based on the state acquired by the state acquisition unit, it is determined by the determination unit whether to permit the opening of the shut-off valve. As a result, when it is determined that the opening of the shutoff valve is permitted, the shutoff valve is opened by the opening means regardless of whether or not the opening instruction is accepted by the opening accepting means. That is, when the selection of the first mode is accepted, the shut-off valve is automatically opened based on the state detected by the detection device. On the other hand, when the second mode is selected by the mode selection means, when the opening instruction is accepted by the opening acceptance means based on the user's operation on the input device, the shut-off valve is opened by the opening means. That is, when the second mode is selected, the shut-off valve is opened based on the user performing an opening instruction operation on the input device. Therefore, if the first mode is selected, the opening of the shut-off valve can be automated to facilitate the work. On the other hand, when safety is particularly taken into consideration, if the second mode is selected, the timing for opening the shut-off valve can be determined by the user. Can be controlled by operations based on Therefore, there exists an effect that a shut-off valve can be opened suitably according to a use mode.

  Moreover, regardless of whether the selection of the first mode or the second mode is accepted by the mode selection means, if the judgment means judges that the opening of the shut-off valve is not permitted, the shut-off valve is closed by the closing means. . Closing means closing the shutoff valve to shut off the discharge of liquid from the tank. Therefore, when an abnormality or the like occurs in various devices, the shutoff valve is automatically closed by the closing means regardless of whether the first mode or the second mode is selected, so that safety can be ensured. There is also an effect.

  According to the liquid transport vehicle of the second aspect, in addition to the effect of the liquid transport vehicle of the first aspect, the following effect is achieved. When the second mode is selected by the mode selection means, the shutoff valve is closed by the closing means when the closing instruction is received by the closing receiving means based on the user's operation on the input device. Therefore, if the second mode is selected, the shut-off valve can be closed based on the user's intention, so that there is an effect that the operation can be performed more suitably.

  According to the liquid transport vehicle of the third aspect, in addition to the effect of the liquid transport vehicle according to the first or second aspect, the following effect is achieved. When the second mode is selected by the mode selection means, and the instruction to open the shut-off valve is accepted by the open accepting means, the shut-off valve is opened on condition that the judgment means judges that the shut-off valve is allowed to open. Is done. In other words, when it is determined by the determining means that the opening of the shut-off valve is not permitted, the shut-off valve is not opened even if the input device is instructed to open the shut-off valve. Therefore, there is an effect that it is possible to prevent the shut-off valve from being inadvertently opened due to an erroneous operation or the like.

  According to the liquid transport vehicle of the fourth aspect, in addition to the effect of the liquid transport vehicle of the third aspect, the following effect is achieved. When the second mode is selected by the mode selection means and the opening instruction of the shut-off valve is accepted by the open accepting means, if the judging means determines that the shut-off valve opening is not permitted, the maintaining means shuts off the shut-off valve Is maintained in a closed state, and the notification means notifies that the opening of the shut-off valve is restricted. Accordingly, it is possible to prevent the shut-off valve from being opened due to an erroneous operation or the like, and to allow the user to recognize that the shut-off valve has been opened in a dangerous state.

(A) A schematic diagram of a bulk lorry, and (b) an explanatory diagram of an LP gas filling system in the bulk lorry. It is a block diagram showing the electric constitution of a bulk lorry. It is a schematic diagram of a screen displayed on the operation panel. It is a flowchart of (a) main processing and (b) function setting processing. It is a flowchart of a filling process. It is a flowchart of an open permission determination process. It is a flowchart of an automatic mode valve opening / closing process. It is a flowchart of a semi-automatic mode valve opening / closing process.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Fig.1 (a) is a schematic diagram showing the structure of the bulk lorry 1 which is an example of a liquid conveyance vehicle as embodiment of this invention. The bulk lorry 1 is a vehicle for transporting LP gas (liquefied petroleum gas) loaded at a supply base to a demand destination such as a business office or a general household, and filling the bulk storage tank installed at the demand destination. .

  The bulk lorry 1 includes a vehicle body 2 and a tank 3. The vehicle body 2 is a vehicle body including a cabin 4, a hose storage box 5, a valve instrument box 6, and the like. The tank 3 is a container for loading LP gas. The tank 3 is loaded with LP gas via a receiving system (not shown) at a supply base or the like. On the other hand, LP gas is filled from the tank 3 into the bulk storage tank at the demand destination via a filling system described later with reference to FIG.

  The cabin 4 forms a driver's cab provided with driving equipment (a handle, a seat, etc., not shown) therein. In addition to operating equipment, a control panel 70 that controls various devices of the bulk lorry 1 and an operation panel 81 that receives operations on the control panel 70 are attached to the interior of the cabin 4. Details of the control panel 70 and the operation panel 81 will be described later with reference to FIG.

  The hose storage box 5 is a case for storing a filling hose 16, a pressure equalizing hose 19, and the like which will be described later with reference to FIG. 1B, and includes a door that can be opened and closed. When filling the bulk storage tank with LP gas, the operator opens the door of the hose storage box 5 and takes out the filling hose 16 and the pressure equalizing hose 19.

  The valve instrument box 6 is a case in which valve opening / closing handles (not shown) provided in various places of the LP gas receiving system and the filling system and instruments (not shown) such as a flow meter are stored. The valve instrument box 6 is also provided with a door like the hose storage box 5. The door is normally closed, and is opened when operation of the opening / closing handle and instruments is necessary for maintenance of the bulk lorry 1 or the like.

  Next, the LP gas filling system in the bulk lorry 1 will be described with reference to FIG. FIG. 1B is a schematic diagram showing an LP gas filling system. The bulk lorry 1 is an LP gas filling system, a liquid line for discharging liquid LP gas from the tank 3 to the bulk storage tank (see the arrow in the figure), and a gas line for recovering the gas vaporized in the bulk storage tank to the tank 3. (See arrow in the figure).

  As a liquid line, an emergency shut-off valve 13 is attached to the liquid port 11 of the tank 3, and the emergency shut-off valve 13 is connected to a liquid feed pump 82 via a pipe 15a. The emergency shut-off valve 13 is a valve for shutting out the LP gas from the tank 3 to the pipe 15a. Although described in detail later, the emergency shut-off valve 13 is opened or closed under the control of the control panel 70. The “closing” of the emergency shutoff valve 13 means closing the emergency shutoff valve 13 to shut off the delivery of LP gas from the tank 3 to the pipe 15a. On the other hand, when the emergency shut-off valve 13 is “opened”, LP gas can be discharged from the tank 3 to the pipe 15a. The emergency shut-off valve 13 is normally closed and is opened when the LP gas is filled into the bulk storage tank.

  The liquid feed pump 82 is a device that discharges liquid LP gas using the driving force of the engine. The liquid feed pump 82 is connected to the filling hose 16 via the pipe 15b, and a coupling 17 for connecting to the bulk storage tank is attached to the tip of the filling hose 16. By connecting the coupling 17 to the bulk storage tank, a path of LP gas (liquid) from the tank 3 to the bulk storage tank is formed.

  On the other hand, as a gas line, an emergency shut-off valve 14 is attached to the gas port 12 of the tank 3, and the emergency shut-off valve 14 is connected to a pressure equalizing hose 19 through a pipe 18. The emergency shut-off valve 14 is opened or closed under the control of the control panel 70 in the same manner as the emergency shut-off valve 13 described above. The emergency shut-off valve 14 is provided to open or close the gas flow path from the pipe 18 to the tank 3. A coupling 20 for connecting to the bulk storage tank is attached to the tip of the pressure equalizing hose 19. By connecting the coupling 20 to the bulk storage tank, a path from the bulk storage tank to the tank 3 is formed.

  Here, a fluid circuit for opening and closing the emergency shut-off valves 13 and 14 will be described. The opening and closing of the emergency shut-off valves 13 and 14 is controlled mainly by the opening and closing of the electromagnetic valve 83. Although details will be described later with reference to FIG. 2, the opening and closing of the electromagnetic valve 83 is controlled by a CPU 71 provided in the control panel 70.

  The emergency shut-off valves 13 and 14 are normally closed valves that are normally closed, and are opened by being urged by hydraulic pressure. A pneumatic / hydraulic converter 33 is connected to the emergency shut-off valves 13 and 14 via a hydraulic pipe 34. The pneumatic / hydraulic converter 33 is a device that converts an air pressure received from an air pipe 32a, which will be described later, into a hydraulic pressure to the hydraulic pipe 34.

  A solenoid valve 83 is connected to the pneumatic / hydraulic converter 33 via an air pipe 32a, and the air tank 31 is connected to the solenoid valve 83 via an air pipe 32b. The air tank 31 is a tank that stores compressed air using the driving force while the engine is driven. The electromagnetic valve 83 is closed when not electrically energized, and is opened when electrically energized under the control of the CPU 71. When the electromagnetic valve 83 is opened, air is supplied from the air tank 31 to the pneumatic / hydraulic converter 33. On the other hand, the electromagnetic valve 83 is configured to shut off the air from the air tank 31 to the pneumatic / hydraulic converter 33 and to release the air in the air pipe 32a to the atmosphere in the closed state.

  That is, when the electromagnetic valve 83 is opened, the air pressure applied to the pneumatic / hydraulic converter 33 increases, and the air pressure is converted into hydraulic pressure by the pneumatic / hydraulic converter 33, whereby the emergency shut-off valves 13 and 14 are attached. It is released by force. On the other hand, when the electromagnetic valve 83 is closed, the air pressure applied to the pneumatic / hydraulic converter 33 is reduced, and the hydraulic pressure output from the pneumatic / hydraulic converter 33 is also reduced. Therefore, the emergency shut-off valves 13 and 14 are closed. The

  Although details will be described later, two modes of “automatic mode” and “semi-automatic mode” are provided as methods for opening and closing the emergency shut-off valves 13 and 14 in the bulk lorry 1 of the present embodiment. The control panel 70 opens or closes the emergency shut-off valves 13 and 14 by controlling the electromagnetic valve 83 according to a mode selected from “automatic mode” or “semi-automatic mode”. The “automatic mode” is a mode in which the emergency shut-off valves 13 and 14 are automatically opened and closed based on the state of various devices included in the bulk lorry 1. On the other hand, the “semi-automatic mode” is a mode for opening and closing the emergency shut-off valves 13 and 14 based on an operation on the operation panel 81. Specific control regarding the “automatic mode” and the “semiautomatic mode” will be described later with reference to the flowcharts of FIGS.

  A manual valve 35 is attached to the air pipe 32a. The manual valve 35 is a normally closed valve that is normally closed. When the manual valve 35 is opened by operating a handle (not shown), the air in the air pipe 32a is opened to the atmosphere. The manual valve 35 is provided to close the emergency shut-off valves 13 and 14 by reducing the air pressure in the air pipe 32a when the electromagnetic valve 83 cannot be controlled for some reason (such as failure of the control panel 70).

  The filling hose 16, the coupling 17, the pressure equalizing hose 19, and the coupling 20 are stored in a hose storage box 5 shown in FIG. Further, the liquid feed pump 82, the air tank 31, the electromagnetic valve 83, the pneumatic / hydraulic converter 33, and the manual valve 35 are accommodated in the valve instrument box 6.

  Next, the electrical configuration of the bulk lorry 1 will be described with reference to FIG. FIG. 2 is a block diagram showing an electrical configuration of the bulk lorry 1 in the present embodiment. The bulk lorry 1 includes the control panel 70 described above. The control panel 70 includes a CPU 71, ROM 72, RAM 73, and flash memory 74, which are connected to an input / output port 76 via a bus line 75, respectively.

  The CPU 71 is an arithmetic device that controls each device connected to the bus line 75, and is configured to be able to input and output signals to and from various devices connected to the input / output port 76. The ROM 72 is a non-rewritable nonvolatile memory storing a control program executed by the CPU 71 (for example, a program for causing the CPU 71 to execute the processes shown in FIGS. 4 to 6) and fixed value data.

  The RAM 73 is a volatile memory that stores various work data, flag values, and the like in a rewritable manner. The RAM 73 includes storage areas for an opening permission flag 73a and an opening operation flag 73b. The opening permission flag 73a is a flag that is turned on when opening of the emergency shutoff valves 13 and 14 is permitted. The opening permission flag 73a is turned on when the opening of the emergency shut-off valves 13 and 14 is permitted based on various states of the bulk lorry 1 in an opening permission determination process (S302) described later with reference to FIG.

  The opening operation flag 73b indicates whether or not there is an instruction to open the emergency shut-off valves 13 and 14 by an operation on the filling screen 300 (see FIG. 3C) in the filling process (S104) described later with reference to FIG. It is a flag for indicating. The release operation flag 73b is turned on when the release button 303 on the filling screen 300 is touched.

  The flash memory 74 is a non-volatile memory that rewritably stores information that the CPU 71 refers to when executing the control program. The flash memory 74 is provided with a storage area for a semi-automatic flag 74a. The semi-automatic flag 74a is a flag indicating whether the above-described “automatic mode” or “semi-automatic mode” is selected as the method for opening and closing the emergency shut-off valves 13 and 14. The semi-automatic flag 74a indicates that “semi-automatic mode” is selected if it is on, and “automatic mode” is selected if it is off. Although details will be described later with reference to the flowchart of FIG. 4B, the semi-automatic flag 74a is updated when the automatic button 201 or the semi-automatic button 202 of the function setting screen 200 (FIG. 3B) is touched. The

  An input / output port 76 of the control panel 70 includes an operation panel 81, a liquid feed pump 82, a solenoid valve 83, a hose storage box sensor 84, a valve instrument box sensor 85, a gas detection sensor 86, a rear-end collision detection sensor 87, and a parking brake sensor 88. The shift lever sensor 89 and the buzzer 90 are connected.

  The operation panel 81 is an input / output device that displays the main screen 100 and the filling screen 300 shown in FIG. 3 under the control of the CPU 71 and receives an operation input to the CPU 71. Examples of the operation panel 81 include a touch panel display in which a touch panel and a liquid crystal panel are stacked. The operation panel 81 is mounted in the cabin 4 as shown in FIG. The operator touches a button displayed on the operation panel 81 to input an instruction corresponding to the button to the CPU 71.

  As described above, the liquid feed pump 82 is a device for discharging the LP gas in the tank 3 to the bulk storage tank via the liquid line (see FIG. 1B). The liquid feed pump 82 discharges LP gas using the rotational driving force of the engine, and its driving is controlled by the CPU 71.

  The electromagnetic valve 83 is a valve for controlling the opening and closing of the emergency shut-off valves 13 and 14 (see FIG. 1B). The electromagnetic valve 83 is opened when electrically energized under the control of the CPU 71. As described above, when the electromagnetic valve 83 is opened, the emergency shut-off valves 13 and 14 are opened. On the other hand, when the solenoid valve 83 is not energized, the solenoid valve 83 is closed. In this case, the emergency shut-off valves 13 and 14 are also closed. The opening and closing of the electromagnetic valve 83 and the emergency shut-off valves 13 and 14 under the control of the CPU 71 will be described later with reference to FIGS.

  The hose storage box sensor 84 is a limit switch that detects whether or not the door of the hose storage box 5 is open, and outputs an ON signal when the door of the hose storage box 5 is open. The valve instrument box sensor 85 is a limit switch that detects whether or not the door of the valve instrument box 6 is opened, and outputs an ON signal when the door of the valve instrument box 6 is opened.

  The gas detection sensor 86 is a sensor that is provided in the valve instrument box 6 and detects the leakage of LP gas that has become gas by detecting the gas concentration in the air. The gas detection sensor 86 outputs an ON signal when the detected gas concentration in the air exceeds a predetermined threshold value.

  The rear-end collision detection sensor 87 is a sensor that is provided behind the bulk lorry 1 and detects the occurrence of a rear-end collision of another vehicle with respect to the bulk lorry 1 by detecting an impact using an acceleration sensor. The rear-end collision detection sensor 87 outputs an ON signal when it is determined that a rear-end collision has occurred based on the impact detected by the acceleration sensor.

  The parking brake sensor 88 is a sensor that detects whether or not the parking brake is applied to the wheels of the bulk lorry 1, and outputs an ON signal when the parking brake is applied. The shift lever sensor 89 is a sensor that detects in which position the shift lever of the bulk lorry 1 is located, and outputs a signal indicating the position of the shift lever.

  The hose storage box sensor 84, the valve instrument box sensor 85, the gas detection sensor 86, the rear-end collision detection sensor 87, the parking brake sensor 88, and the shift lever sensor 89 are in an open permission determination process (S302) described later with reference to FIG. This is used to determine whether or not to permit opening of the emergency shutoff valves 13 and 14.

  The buzzer 90 is a device that emits a warning sound under the control of the CPU 71. The buzzer 90 is used to notify an operator of an erroneous operation in an open permission determination process (S302) described later with reference to FIG.

  Next, a screen displayed on the operation panel 81 will be described with reference to FIG. In FIG. 3, (a) a main screen 100 displayed when the control panel 70 is activated, (b) a function setting screen 200 for setting an opening / closing method of the emergency shut-off valves 13 and 14, and (c) ) Each of the filling screens 300 displayed during the filling operation is shown.

  The main screen 100 in FIG. 3A is an initial screen displayed on the operation panel 81, and is a screen for an operator to select a function. On the main screen 100, a function setting button 101 and a filling button 102 are displayed. The function setting button 101 is a button that is touch-operated when changing a setting value or the like stored in the flash memory 74. When the function setting button 101 is touched, a function setting screen 200 (FIG. 3B) to be described later is displayed on the operation panel 81.

  The filling button 102 is a button that is touch-operated when performing an operation of filling LP gas into a bulk storage tank at a demand destination. When the filling button 102 is touched, a filling screen 300 (FIG. 3C) to be described later is displayed on the operation panel 81.

  Next, the function setting screen 200 shown in FIG. The function setting screen 200 is a screen for selecting either the above-described “automatic mode” or “semi-automatic mode” as a method for opening and closing the emergency shut-off valves 13 and 14. The function setting screen 200 is displayed on the operation panel 81 when the function setting button 101 on the main screen 100 (FIG. 3A) is touched. On the function setting screen 200, an automatic button 201, a semi-automatic button 202, and an end button 203 are displayed.

  The automatic button 201 and the semi-automatic button 202 are buttons for selecting either “automatic mode” or “semi-automatic mode” as a method for opening and closing the emergency shut-off valves 13 and 14. When the automatic button 201 is touched, the “automatic mode” is selected and the semi-automatic flag 74a is turned off. On the other hand, when the semi-automatic button 202 is touched, the “semi-automatic mode” is selected and the semi-automatic flag 74a is turned on. The end button 203 is a button for switching the display of the operation panel 81 to the main screen 100 when the mode selection is completed.

  Next, the filling screen 300 in FIG. The filling screen 300 is a screen that is displayed when the filling button 102 of the main screen 100 is touch-operated when filling the bulk gas tank of the demand destination with LP gas. On the filling screen 300, a mode display section 301, an open button 303, a close button 304, a start button 305, a stop button 306, and an end button 307 are displayed.

  The mode display unit 301 is an area that displays whether “automatic mode” or “semi-automatic mode” is selected as the opening / closing method of the emergency shut-off valves 13 and 14 on the function setting screen 200 described above. Specifically, if the semi-automatic flag 74a is off, “automatic” is displayed on the mode display unit 301 as “automatic mode” is selected. On the other hand, if the semiautomatic flag 74a is on, “semi-automatic mode” is displayed. "Semi-automatic" is displayed as if is selected. Therefore, the operator can grasp which mode is selected by checking the mode display unit 301.

  The release button 303 and the close button 304 are buttons for instructing to open or close the emergency shut-off valves 13 and 14. Although details will be described later, when the “semi-automatic mode” is selected, the electromagnetic valve 82 is controlled by touching the release button 303 or the close button 304, thereby opening or closing the emergency shut-off valves 13 and 14. be able to. The operator can easily instruct opening and closing of the emergency shut-off valves 13 and 14 by operating the operation panel 81.

  The start button 305 is a button that is touch-operated to start driving the liquid feed pump 82, and the stop button 306 is a button that is touch-operated to stop driving the liquid feed pump 82. The end button 307 is a button that is touch-operated to switch the display of the operation panel 81 to the main screen 100 when the filling operation is completed.

  As described above, the three screens displayed on the operation panel 81 have been described with reference to FIG. 3, but in the bulk lorry 1 of the present embodiment, the “automatic mode” or “semiautomatic mode” that is less likely to be changed frequently. Selection is performed on a function setting screen 200 different from the filling screen 300. Thereby, it can prevent changing a mode accidentally at the time of the filling operation | work of LP gas.

  Next, processing executed by the CPU 71 of the control panel 70 in the bulk lorry 1 of the present embodiment will be described with reference to FIGS. The main process shown in FIG. 4A is a process that is started by the CPU 71 when the control panel 70 is activated.

  In the main process, the CPU 71 displays the main screen 100 (FIG. 3A) on the operation panel 81 (S101). The CPU 71 determines which of the function setting button 101 and the filling button 102 has been touched on the main screen 100 (S102). In S102, the CPU 71 stands by until any button is touched.

  If the CPU 71 determines in S102 that the function setting button 101 has been touched (S102: function setting button), the CPU 71 executes a function setting process (S103) shown in FIG. Although the details will be described later, the function setting process (S103) is a process of displaying the function setting screen 200 described above on the operation panel 81 and accepting selection of an opening / closing method of the emergency shutoff valves 13 and 14.

  On the other hand, if the CPU 71 determines in S102 that the filling button 102 has been touched (S102: filling button), the CPU 71 executes the filling process (S104) shown in FIG. Although details will be described later, in the filling process (S104), the emergency shutoff valves 13 and 14 are opened and closed according to the mode selected on the function selection screen 200, and the driving of the liquid feed pump 82 is controlled to fill the LP gas. It is processing.

  When the function setting process (S103) or the filling process (S104) is completed, the CPU 71 displays the main screen 100 on the operation panel 81 again (S101) and repeats the main process. By repeatedly executing the main processing, the CPU 71 can execute processing corresponding to the function setting button 101 or the filling button 102 touched on the main screen 100.

  FIG. 4B is a flowchart showing the function setting process (S103) described above. The function setting process (S103) is a process executed when the function setting button 101 is touched on the main screen 100 (S102: function setting button in FIG. 4A).

  The CPU 71 displays the function setting screen 200 on the operation panel 81 (S201). The CPU 71 determines which button has been touched on the function setting screen 200 (S202). In S202, the CPU 71 stands by until any button is touched.

  If the CPU 71 determines in S202 that the automatic button 201 has been touched (S202: automatic button), the CPU 71 turns off the semi-automatic flag 74a (S203). That is, “automatic mode” is set as a method for opening and closing the emergency shut-off valves 13 and 14.

  On the other hand, if the CPU 71 determines in S202 that the semi-automatic button 202 has been touched (S202: semi-automatic button), the CPU 71 turns on the semi-automatic flag 74a (S204). That is, “semi-automatic mode” is set as a method for opening and closing the emergency shut-off valves 13 and 14.

  In S202, if the CPU 71 determines that the end button 203 has been touched (S202: end button), the process ends, and the process proceeds to the main process (FIG. 4A).

  Through the function setting process (S103) described above, the selection of either “automatic mode” or “semiautomatic mode” as the method for opening the emergency shutoff valves 13 and 14 is set in the semiautomatic flag 74a. The storage area for the semi-automatic flag 74a is provided in the nonvolatile flash memory 74 (see FIG. 2). Therefore, since the value of the semi-automatic flag 74a is held even after the control panel 70 is turned off, it is possible to save the trouble of setting the semi-automatic flag 74a every time the control panel 70 is turned on.

  FIG. 5 is a flowchart showing the above-described filling process (S104). The filling process (S104) is a process for filling the LP gas by controlling the opening and closing of the emergency shutoff valves 13 and 14 and controlling the driving of the liquid feed pump 82. The filling process (S104) is executed when the filling button 102 on the main screen 100 is touched (S102: filling button in FIG. 4A).

  The CPU 71 displays the filling screen 300 shown in FIG. 3C on the operation panel 81 (S301). At this time, the CPU 71 displays “semi-automatic” on the mode display unit 301 if the semi-automatic flag 74a is on, and displays “automatic” on the mode display unit 301 if the semi-automatic flag 74a is off. As a result, the mode display unit 301 can grasp whether “automatic mode” or “semi-automatic mode” is selected as the method for opening and closing the emergency shut-off valves 13 and 14.

  The CPU 71 performs an initialization process to turn off the release permission flag 73a and the release operation flag 73b stored in the RAM 73 before displaying the filling screen 300 in the process of S301.

  When the filling screen 300 is displayed in the process of S301, the CPU 71 executes an open permission determination process (S302) shown in FIG. The opening permission determination process (S302) is a process of determining whether or not to permit the opening of the emergency shutoff valves 13 and 14 based on various states of the bulk lorry 1, and updating the opening permission flag 73a as the determination result. Here, the release permission determination process (S302) will be described with reference to FIG.

  In the opening permission determination process (S302), the CPU 71 first acquires the outputs of various sensors (see FIG. 2) connected to the input / output port 76 (S401). For example, a signal indicating whether or not the door of the hose storage box 5 is opened is acquired from the hose storage box sensor 84. The information acquired in S401 is used for determinations in S402 to S407 described later. As will be described in detail below, when the CPU 71 denies any of the determinations in S402 to S407, the CPU 71 executes S409 to limit the opening of the emergency shut-off valves 13 and 14. On the other hand, when the CPU 71 affirms all the determinations in S402 to S407, the CPU 71 executes S408 and permits the emergency shut-off valves 13 and 14 to be opened.

  First, the CPU 71 determines whether or not the parking brake is applied to the wheels of the bulk lorry 1 based on the information acquired in S401 (S402). Specifically, it is determined whether or not the output of the parking brake sensor 88 is on. If the output is on, it is determined that the parking brake is applied. When the CPU 71 determines that the parking brake is not applied (S402: No), the CPU 71 proceeds to S409.

  When the CPU 71 determines in S402 that the parking brake is applied (S402: Yes), the CPU 71 determines whether or not the position of the shift lever is neutral (S403). Specifically, the CPU 71 determines whether or not the position of the shift lever is neutral based on the output signal of the shift lever sensor 89. When the CPU 71 determines that the position of the shift lever is not neutral (S403: No), the CPU 71 proceeds to S409.

  If the CPU 71 determines in S403 that the position of the shift lever is neutral (S403: Yes), the CPU 71 determines whether or not the door of the hose storage box 5 is open (S404). Specifically, the CPU 71 checks whether or not the output of the hose storage box sensor 84 is on. If the output is on, the CPU 71 determines that the door of the hose storage box 5 is open. When the CPU 71 determines that the door of the hose storage box 5 is closed (S404: No), the filling hose 16 and the like are not removed from the hose storage box 5 in order to perform the filling of the LP gas. Transition.

  In S404, when the CPU 71 determines that the door of the hose storage box 5 is in an open state (S404: Yes), the CPU 71 determines whether or not the door of the valve instrument box 6 is in a closed state (S405). Specifically, the CPU 71 checks whether or not the output of the valve instrument box sensor 85 is off. If the output is off, the CPU 71 determines that the door of the valve instrument box 6 is closed. When the CPU 71 determines that the door of the valve instrument box 6 is in an open state (S405: No), there is a possibility that the device (instrument etc.) accommodated in the valve instrument box 6 has been handled for the purpose of maintenance or the like. Therefore, the process proceeds to S409.

  If the CPU 71 determines in S405 that the door of the valve instrument box 6 is closed (S405: Yes), it determines whether or not a gas leak has been detected (S406). Specifically, the CPU 71 checks whether or not the output of the gas detection sensor 86 is off. If the output is off, the CPU 71 determines that no gas leak has been detected. When the CPU 71 determines that gas leakage has been detected (S406: No), the CPU 71 proceeds to S409 in order to prevent a flammable accident to LP gas.

  If the CPU 71 determines in S406 that no gas leak has been detected (S406: Yes), the CPU 71 determines whether or not a rear-end collision with the bulk lorry 1 by another vehicle has been detected (S407). Specifically, the CPU 71 checks whether or not the output of the rear-end collision detection sensor 87 is off. If the output is off, the CPU 71 determines that the rear-end collision is not detected. When the CPU 71 determines that a rear-end collision has been detected (S407: No), the CPU 71 proceeds to S409 in order to prevent a secondary disaster.

  If the CPU 71 determines in S407 that the rear-end collision has not been detected (S407: Yes), the CPU 71 sets the release permission flag 73a on the assumption that the emergency shut-off valves 13 and 14 can be opened based on the determinations in S402 to S407. Turn on (S408). Thereafter, the CPU 71 ends the present process and returns to the filling process (S104 in FIG. 5).

  On the other hand, when the CPU 71 reaches S409 based on the determinations of S402 to S407, the opening of the emergency shutoff valves 13 and 14 cannot be permitted, that is, the emergency shutoff valves 13 and 14 should be closed. Is turned off (S409).

  In the process of S409, when the release permission flag 73a is turned off, the CPU 71 determines whether or not the semi-automatic flag 74a is turned on (S410). When the CPU 71 determines that the semi-automatic flag 74a is on (S410: Yes), the CPU 71 determines whether or not the opening operation flag 73b is on (S411). That is, in S410 and S411, the CPU 71 determines whether or not the opening / closing method of the emergency shut-off valves 13 and 14 is the “semi-automatic mode” (S410: Yes), and the release button 303 is touch-operated on the operation panel 81 ( S411).

  When the CPU 71 determines that the opening operation flag 73b is on (S411: Yes), the emergency cutoff valve 13 and 14 are not permitted to open (the opening permission flag 73a is off), but the emergency cutoff valve Since the opening instructions 13 and 14 are instructed, the opening operation flag 74b is turned off to cancel the opening instruction (S412). As will be described in detail later, since the determination of S606 in FIG. 8 is denied when the opening operation flag 74b is turned off in S412 (S606: OFF), the emergency shut-off valves 13 and 14 are closed by the processing of S606. Can be maintained. Thereby, it is possible to prevent the emergency shut-off valves 13 and 14 from being opened in a dangerous state. In particular, even when the release button 303 is touched by mistake, the emergency shut-off valves 13 and 14 can be prevented from being opened carelessly.

  After turning off the opening operation flag 74b (S412), the CPU 71 sounds the buzzer 90 to notify (S413). Thereby, it can be made to recognize that the open button 303 was touch-operated in the state in which the opening of the emergency shut-off valves 13 and 14 was restricted to an operator or the like. After S413, the CPU 71 ends this process.

  If the CPU 71 determines in S410 that the semi-automatic flag 74a is off (S410: No), or if it determines in S411 that the opening operation flag 73b is off (S411: No), the processing of S412 and S413 is performed. Processing is skipped and this processing is terminated.

  Whether or not to permit the opening of the emergency shut-off valves 13 and 14 based on various states of the bulk lorry 1 is set in the opening permission flag 73a by the opening permission determination process (S302) described above. Further, when the emergency shutoff valves 13 and 14 are not permitted to be opened, the open operation flag 73b is forcibly turned off (S412), thereby suppressing adverse effects of erroneous operations.

  Returning to FIG. 5, the description of the filling process (S104) will be continued. When the above-described release permission determination process (S302) ends, the CPU 71 determines whether or not the semi-automatic flag 74a is on (S303). If the semi-automatic flag 74a is off (S303: off), the “automatic mode” is set. The automatic mode valve opening / closing process (S304) shown in FIG. 7 is executed, and if the semi-automatic flag 74a is on (S303: ON), the semi-automatic mode valve opening / closing process (S305) shown in FIG. .

  First, the automatic mode valve opening / closing process (S304) will be described with reference to FIG. The automatic mode valve opening / closing process (S304) is a process for opening and closing the emergency shut-off valves 13 and 14 in accordance with ON / OFF of the opening permission flag 73a. The CPU 71 determines whether or not the release permission flag 73a is on (S501). When the CPU 71 determines that the opening permission flag 73a is off (S501: off), the emergency shutoff valves 13 and 14 are closed (S502), and the present process is terminated.

Specifically, the CPU 71 closes the emergency shut-off valves 13 and 14 by releasing the bias to the emergency shut-off valves 13 and 14 by closing the electromagnetic valve 83. Thereby, when the opening permission flag 73a is OFF (S501: OFF), the emergency shut-off valves 13 and 14 are closed by the process of S502 regardless of whether the opening operation flag 74b is OFF. , Can ensure safety. For example, when the emergency shut-off valves 13 and 14 are opened and the door of the hose storage box 5 is closed in S404 of FIG. 6 (S404: No), in the process of S409 of FIG. Since 73a is turned off, the emergency shut-off valves 13 and 14 can be closed in S502.
If the emergency shut-off valves 13 and 14 are already closed in S502, the CPU 71 maintains the closed state.

  On the other hand, in the process of S501, when it is determined that the release permission flag 73a is ON (S501: ON), the emergency shutoff valves 13 and 14 are opened (S503). Thereby, when the opening permission flag 73a is ON (S501: ON), the emergency shut-off valves 13 and 14 can be automatically opened regardless of whether or not the opening operation flag 73b is OFF. .

  Moreover, CPU71 confirms whether the emergency cutoff valves 13 and 14 are open | released, when opening the emergency cutoff valves 13 and 14 in the process of S503 (S504). Specifically, it is confirmed whether or not the emergency shutoff valves 13 and 14 are open based on the detection result of a pressure sensor (not shown) provided in the hydraulic pipe 34 (see FIG. 1B). As a result, if the emergency shut-off valves 13 and 14 are opened (S504: Yes), this process ends. On the other hand, if it is not opened (S504: No), a warning sound is sounded (S505), the operator is informed that an abnormality has occurred in the operation of the emergency shut-off valves 13, 14, and the process is terminated. . Thereby, the emergency shut-off valves 13 and 14 can be opened and closed according to the on / off state of the opening permission flag 73a.

  Next, the semi-automatic mode valve opening / closing process (S305) will be described with reference to FIG. The semi-automatic mode valve opening / closing process (S305) is a process mainly for opening / closing the emergency shut-off valves 13 and 14 in accordance with the ON / OFF of the opening operation flag 73b. The CPU 71 determines whether the release button 303 (see FIG. 3C) has been operated (S601), and if it has been operated (S601: Yes), turns on the release operation flag 73b (S602), and the processing of S605 Migrate to

  On the other hand, when determining that the release button 303 is not operated (S601: No), the CPU 71 determines whether the close button 304 (see FIG. 3C) is operated (S603). As a result, if the close button 304 is operated (S603: Yes), the opening operation flag 73b is turned off (S604), and the process proceeds to S605. In the process of S603, if the close button 304 is not operated (S603: No), the process proceeds to S605 as it is.

  In the process of S605, the CPU 71 determines whether or not the release permission flag 73a is on (S605). When the CPU 71 determines that the opening permission flag 73a is OFF (S605: OFF), the CPU 71 closes the emergency shut-off valves 13 and 14 (S607). Specifically, the CPU 71 closes the emergency shut-off valves 13 and 14 by releasing the bias to the emergency shut-off valves 13 and 14 by closing the electromagnetic valve 83. Thereby, when the release permission flag 73a is OFF (S605: OFF), the emergency shut-off valves 13 and 14 are closed by the process of S607 regardless of whether or not the release operation flag 73b is OFF. , Can ensure safety. For example, when the emergency shut-off valves 13 and 14 are opened and the door of the hose storage box 5 is closed in S404 of FIG. 6 (S404: No), in the process of S409 of FIG. Since 73a is turned off, the emergency shut-off valves 13 and 14 can be closed in S607. If the emergency shut-off valves 13 and 14 are already closed in S607, the CPU 71 maintains the closed state.

  On the other hand, when the CPU 71 determines that the opening permission flag 73a is ON (S605: ON), the CPU 71 determines whether or not the opening operation flag 73b is ON (S606). That is, the CPU 71 is instructed to open the emergency shut-off valves 13 and 14 on the filling screen 300 (whether the release button 303 has been touched) or has been instructed to close (the close button 304 is touched). Whether it was operated).

  When the CPU 71 determines that the opening operation flag 73b is OFF (S606: OFF), the CPU 71 closes the emergency shut-off valves 13 and 14 on the assumption that the closing button 304 is touched on the filling screen 300 (S607).

  In the above-described opening permission determination process (S302 in FIG. 6), it is determined that opening of the emergency shutoff valves 13 and 14 is not permitted (No in S402 to S407), and the opening operation flag 73b is forcibly turned off. Also when it is set to (S412), CPU71 denies determination of S606 and transfers to S607. Thereby, since the emergency shut-off valves 13 and 14 can be maintained in a closed state, it is possible to prevent the emergency shut-off valves 13 and 14 from being opened in a dangerous state.

  On the other hand, when the CPU 71 determines that the opening operation flag 73b is ON (S606: ON), the CPU 71 opens the emergency shut-off valves 13 and 14 on the assumption that the opening button 303 is touched on the filling screen 300 (S608). ). Specifically, the CPU 71 opens the emergency shut-off valves 13 and 14 by opening the solenoid valve 83 and energizing the emergency shut-off valves 13 and 14 in S608.

  The opening operation flag 73b is turned on in the processing of S606 when S412 is not executed in the above-described opening permission determination processing (S302 in FIG. 6). That is, it is determined that the opening of the emergency shutoff valves 13 and 14 is permitted in the opening permission determination process (S302) (Yes in S402 to S407), and the opening operation flag 73b is turned on in S606. is there. Therefore, even when the release button 303 is touch-operated, if the release is not permitted by the release permission determination process (S302), the emergency shut-off valves 13 and 14 are not opened, and safety can be ensured.

  Moreover, CPU71 confirms whether the emergency cutoff valves 13 and 14 are open | released, when opening the emergency cutoff valves 13 and 14 in the process of S608 (S609). Specifically, it is confirmed whether or not the emergency shutoff valves 13 and 14 are open based on the detection result of a pressure sensor (not shown) provided in the hydraulic pipe 34 (see FIG. 1B). As a result, if the emergency shut-off valves 13 and 14 are opened (S609: Yes), this process ends. On the other hand, if it is not opened (S609: No), a warning sound is sounded (S610), the operator is informed that an abnormality has occurred in the operation of the emergency shut-off valves 13, 14, and the process is terminated. . Thereby, the emergency shut-off valves 13 and 14 can be opened and closed mainly in accordance with the on / off state of the opening operation flag 73b.

  Returning to FIG. 5 again, the description of the filling process (S104) will be continued. In the processes of S304 and S305, after controlling the opening or closing of the emergency shutoff valves 13 and 14, the CPU 71 controls the driving of the liquid feed pump 82 (S306). For example, it is determined whether the drive permission condition of the liquid feed pump 82 is satisfied or the start button 305 (see FIG. 3C) is touched, and after satisfying the drive permission condition of the liquid feed pump 82, When the start button 305 is touched, the liquid feed pump 82 is driven. Further, when the drive permission condition of the liquid feed pump 82 is not satisfied or the stop button 306 (see FIG. 3C) is touched, the liquid feed pump 82 is stopped.

  Thereafter, the CPU 71 determines whether or not the liquid feed pump 82 is being driven (S307). As a result, when it is determined that the liquid feed pump 82 is being driven (S307: Yes), the process proceeds to S302. On the other hand, when determining that the liquid feed pump 82 is not being driven (S307: No), the CPU 71 determines whether or not the end button 307 (see FIG. 3C) has been touched (S308). As a result, when it is determined that the end button 307 has not been touch-operated (S308: No), the process proceeds to S302, and when it is determined that a touch operation has been performed (S308: Yes), this process ends. To do.

  According to the bulk lorry of the present embodiment described above, if the “semi-automatic mode” is selected by touching the semi-automatic button 202 on the function setting screen 200 (FIG. 3B), the filling screen 300 ( The opening / closing of the emergency shut-off valves 13 and 14 can be controlled by touching the release button 303 or the close button 304 in FIG. Therefore, the emergency shut-off valves 13 and 14 can be opened and closed based on the operator's judgment as necessary.

  In addition, since “automatic mode” or “semi-automatic mode” can be selected on the function setting screen 200, “automatic mode” is selected to open and close the emergency shut-off valves 13 and 14 when there is no need for the operator's judgment. Can be automated. Therefore, since an appropriate control method can be selected according to the situation, the LP gas filling operation can be suitably performed.

  Further, when it is determined in the opening permission determination process (S302 in FIG. 6) that the emergency shutoff valves 13 and 14 are not permitted to be opened based on various states of the bulk lorry 1, either the “automatic mode” or the “semiautomatic mode” is selected. Even when the mode is selected, the emergency shut-off valves 13 and 14 are closed (S501 in FIG. 7: OFF, S605 in FIG. 8: OFF). Therefore, safety can be ensured.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. Can be inferred.

  For example, in the above-described embodiment, the application of the present invention to the bulk lorry 1 that transports LP gas has been described. However, the present invention can naturally be applied to various vehicles that transport liquid.

  Moreover, in the said embodiment, although the conditions of permission of the opening of the emergency shut-off valves 13 and 14 and the conditions for closing were the same conditions (S402 to S407 in FIG. 6), the opening is permitted. The condition and the condition for closing may be different. For example, after applying the condition (S405: No) that the door of the valve-instrument box 6 is closed as a condition for opening the emergency shut-off valves 13 and 14, the emergency shut-off valves 13 and 14 are opened. Even if the door of the valve instrument box 6 is opened, the emergency shut-off valves 13 and 14 may not be closed. This is because the instruments stored in the valve instrument box 6 may be confirmed during the filling operation.

  In addition, the open / close state of the door of the valve instrument box 6 may be ignored in the open / close permission determination process (S302 in FIG. 6) for a predetermined time by an operation on the operation panel 81. Specifically, a “valve instrument box release button” is provided on the operation panel 81, and the door of the valve instrument box 5 is opened within a predetermined time (for example, 5 minutes) after the valve instrument box release button is touched. Alternatively, the configuration may be such that Yes is determined in S405 of the open / close permission determination process (S302). As a result, when the user performs an operation of clearly indicating that the door of the valve instrument box 6 is to be opened, the state of the door of the valve instrument box 6 can be excluded from the judgment of closing of the emergency shutoff valves 13 and 14. The work performed with the emergency shut-off valves 13 and 14 opened can be continued.

  Furthermore, the above-described “valve instrument box opening button” may be touchable when “semi-automatic mode” is selected as the method for opening and closing the emergency shut-off valves 13 and 14. In the above embodiment, when the opening permission flag 73a is off even in the “semi-automatic mode” (S605 in FIG. 8: off), the emergency shutoff valves 13 and 14 are closed, but the valve instrument box opening button is pressed. If the door of the valve instrument box 6 is opened after the touch operation, the opening permission flag 73a can be prevented from being turned off in the opening permission determination process (S302 in FIG. 6). Therefore, when the “semi-automatic mode” is selected, the emergency shutoff valves 13 and 14 can be continuously opened by an operation based on the user's intention.

  In addition, although the door of the valve instrument box 6 was described here, the other conditions determined in the opening / closing permission determination process (S302) may be similarly excluded from the determination.

  Moreover, in the said embodiment, you may comprise so that display / non-display may be switched about the open button 303 and the close button 304 of the filling screen 300 (FIG.3 (c)) displayed on the operation panel 81. FIG. For example, the release button 303 may be displayed only when the release permission flag 73a is on as a result of the release permission determination process (S302 in FIG. 6). In this way, it is possible to indicate to the user whether or not the emergency shut-off valves 13 and 14 can be opened, and it is possible to prevent erroneous operations. Further, when the semi-automatic flag 74a is off, that is, when “automatic mode” is selected, the release button 303 and the close button 304 may be hidden.

  In the above-described embodiment, the control panel 70 (CPU 71) is replaced with the open button 303 or the close button 304 displayed on the operation panel 81, and a remote controller configured to be able to input a signal to the control panel 70 by wired or wireless communication. Therefore, it is naturally possible to configure to accept an instruction to open or close the emergency shut-off valves 13 and 14. Thereby, for example, when the worker connects the filling hose 16 to the bulk storage tank, the emergency shut-off valves 13 and 14 can be opened using the remote controller without returning to the bulk lorry 1, thereby improving workability. it can.

1 Bulk lorry (liquid transport vehicle)
2 Car body 3 Tank 13 Emergency shutoff valve (shutoff valve)
70 Control panel (control device)
81 Operation panel (input device)
84 Hose storage box sensor (detection device)
85 Valve instrument box sensor (detection device)
86 Gas detection sensor (detection device)
87 Rear-end collision detection sensor (detection device)
88 Parking brake sensor (detection device)
89 Shift lever sensor (detection device)
S202 to S294 (mode selection means)
S601, S602 (opening reception means)
S603, S604 (closing reception means)
S503, S608 (opening means)
S502, S607 (closing means)
S401 (status acquisition means)
S402 to S407 (determination means)
S412 (part of maintenance means)
S413 (notification means)

Claims (4)

A vehicle body, a tank mounted on the vehicle body for loading liquid, a shut-off valve for blocking a flow path for discharging the liquid from the tank, a detection device for detecting states of various devices mounted on the vehicle body, and In a liquid transport vehicle comprising: a control device that controls opening and closing of the shutoff valve based on a detection result of a detection device; and an input device that inputs information based on a user operation to the control device.
The controller is
State acquisition means for acquiring a state detected by the detection device;
Determining means for determining whether to permit opening of the shutoff valve based on the state acquired by the state acquiring means;
An opening receiving means for receiving an instruction to open the shut-off valve based on a user operation on the input device;
Mode selection means for selecting either the first mode or the second mode different from the first mode as the control mode of the shut-off valve based on a user operation on the input device;
When the first mode is selected by the mode selection means, whether or not an instruction to open the shut-off valve has been accepted by the open accepting means when the judgment means judges that the shut-off valve is allowed to open Regardless of this, if the second mode is selected by the mode selection means, the cutoff valve is opened when the opening acceptance means accepts an instruction to open the cutoff valve. An opening means to
Closed to close the shut-off valve regardless of whether the mode selection means selects the first mode or the second mode when the judging means judges not to allow the shut-off valve to be opened. And a liquid carrying vehicle. The control device includes a closing reception unit that receives an instruction to close the shut-off valve based on a user operation on the input device,
The closing means closes the shut-off valve when an instruction to close the shut-off valve is received by the close accepting means when the second mode is selected by the mode selecting means. The liquid carrying vehicle according to claim 1. The opening means is
When the second mode is selected by the mode selection means and an instruction to open the shut-off valve is received by the open accepting means, it is determined that the opening of the shut-off valve is permitted by the judging means. The liquid carrying vehicle according to claim 1, wherein the shutoff valve is opened as a condition. The controller is
When the second mode is selected by the mode selection means and an instruction to open the shut-off valve is accepted by the open accepting means, the judgment means judges that opening of the shut-off valve is not permitted Maintaining means for keeping the shut-off valve closed;
4. The liquid according to claim 3, further comprising a notifying means for notifying that opening of the shut-off valve is restricted when the shut-off valve is maintained closed by the maintaining means. Transportation vehicle.

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