JP2010126194A - Unloading system of tank lorry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent contamination during unloading. <P>SOLUTION: When a driver arrives at a filling station for unloading, he presses the on-switch of an electric power source of an unloading computer 30 to shift to a preparation stage for unloading work. After the unloading work and the shift to the preparation stage are detected, when the fact that unloading valves 60A to 60D are closed after they are opened is detected by opening and closing sensors 62A to 62D, the unloading computer 30 judges that the remaining oil in the unloading pipe 80 is discharged to release a lock of each of bottom valves 40a to 40g of hatches 23a to 23g. The unloading computer 30 extracts a hatch number and an unloading number each corresponding to order data from various control programs and unloading database memorized in a memory to conduct unloading control treatment. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tank truck unloading system for unloading liquid fuel (for example, gasoline, light oil, etc.) loaded on a tank truck.

  For example, a tank truck is used as a fuel carrying means for delivering liquid fuel (hereinafter referred to as “fuel”) from an oil tank station to a gas station. The tank truck is equipped with a plurality of hatches partitioned by a partition wall, and each hatch is individually loaded with the type of fuel ordered from the filling station (see, for example, Patent Document 1). Here, although only one hatch may be mounted as a tank truck, in the following description, a case where the tank truck has a plurality of hatches will be described as an example.

  The tank truck is provided with a plurality of discharge ports, and the discharge ports communicate with the bottom valves of the hatches through unloading piping. An unloading valve is provided in a pipe that connects the hatch loaded with unloading fuel and the discharge port.

When the tanker truck driver arrives at the filling station, he connects one end of the unloading hose to one outlet corresponding to the hatch loaded with the unloading liquid, and the other end of the unloading hose is connected to the fuel. Connect to the corresponding underground tank lubrication pipe. Further, the driver opens the unloading valve at the discharge port to which the unloading hose is connected, and then opens the hatch bottom valve to unload the hatch fuel to the underground tank.
Japanese Patent No. 3905600

  By the way, when unloading fuel from the hatch of a tank truck, if unloading is performed from the discharge port with fuel remaining in the unloading pipe, the fuel remaining in the unloading pipe will be unloaded from the discharge port. There was a problem of being unloaded together.

  In view of the above circumstances, an object of the present invention is to provide a tank truck unloading system that solves the above-described problems.

  In order to solve the above problems, the present invention has the following means.

  The present invention, a tank truck loaded with liquid fuel in the hatch arrives at the delivery destination, one end of the hatch discharge port provided at the other end of the unloading pipe communicated with the bottom of the hatch, After connecting with the filling port of the supplied container to be supplied with the liquid fuel by an unloading hose, the bottom valve provided in the hatch is opened, and the liquid is supplied from the hatch to the supplied container. In an unloading system of a tank truck for unloading fuel, an unloading valve provided in the vicinity of the discharge port, a valve opening detecting means for detecting that the unloading valve is opened, and the unloading system An unloading preparation start detecting means for detecting that the unloading preparation stage before the valve is opened, and after the unloading preparation start detecting means detects that the unloading preparation start stage has been entered. The valve opening detection When it is detected that the unloading valve has been opened by the stage, it is detected that the liquid fuel that may remain in the unloading pipe has been discharged, and the remaining And a discharge processing detecting means for outputting a liquid processing completion signal.

  The tank lorry vehicle of the present invention has discharge ports of the hatch on the left and right sides of the tank lorry vehicle, and further includes an inclination direction detection unit that detects an inclination direction of the tank lorry vehicle, and the discharge processing detection unit includes: When it is detected by the unloading preparation start detection means that the unloading preparation stage has been entered, the inclination direction detected by the inclination direction detection means is read and corresponds to the discharge ports arranged in the inclination direction. When it is detected that the unloading valve is opened, it is detected that the liquid fuel that may remain in the unloading pipe has been discharged, and the remaining liquid processing is completed. A signal is output.

  The discharge processing detection means of the present invention is characterized in that it has notification means for notifying the unloading valve in the inclination direction detected by the inclination direction detection means.

  The hatch bottom valve of the present invention is characterized in that it can be opened on at least one condition that a residual liquid processing completion signal is output from the discharge processing detecting means.

  According to the first aspect of the present invention, the residual liquid processing completion signal is output when the discharge processing detecting means detects that the fuel remaining in the unloading pipe has been discharged. Is output, for example, it becomes possible to open the hatch bottom valve or to notify the completion of the discharge process. As a result, it is possible to prevent the liquid fuel remaining in the unloading pipe from being mixed with the liquid fuel to be unloaded, which can be caused by not discharging the liquid fuel remaining in the unloading pipe. can do.

  According to the second aspect of the present invention, the liquid fuel remaining in the unloading pipe is discharged from the discharge ports arranged on the left and right sides of the tank lorry vehicle in the inclination direction (lower side) of the tank lorry vehicle. It becomes possible to confirm that it was done.

According to the third aspect, the discharge of the liquid fuel remaining in the unloading pipe is performed by notifying the unloading valve disposed at the discharge port in the inclination direction (lower side) of the tank truck. It can be done reliably.
According to claim 4, when the residual liquid processing completion signal is output, or the residual liquid processing completion signal is output, other conditions (for example, oil type confirmation between the hatch and the underground tank, overflow confirmation) If satisfied, the hatch bottom valve can be opened.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram schematically showing an embodiment of a tank truck unloading system according to the present invention. As shown in FIG. 1, an unloading system 10 for a tank lorry vehicle includes an unloading computer 30 mounted on the tank lorry vehicle 20, a bottom valve 40 mounted on the tank lorry vehicle 20, and an unloading provided on the discharge port 50. And a discharge valve sensor 70 that detects opening and closing of the unloading valve 60.

  For example, the tank truck 20 has an unloading computer 30 mounted on the driver's seat or the like, and when the driver arrives at the filling station to unload, the power switch of the unloading computer 30 is turned on to perform unloading work. Move to the preparation stage.

  In addition, the tank truck 20 is provided with a cylindrical tank 22 at the rear of the driver's seat, and the tank 22 is provided with a plurality of hatches 23 (23a to 23g) partitioned by a partition wall. Each of the hatches 23a to 23g has a predetermined loading capacity such as 1 kiloliter, 2 kiloliters, and 4 kiloliters.

  Each hatch 23a to 23g is loaded with the fuel of the type (oil type) ordered from the gas station. Furthermore, the bottom part of each hatch 23a-23g is provided with the bottom valve 40 (40a-40g) opened at the time of unloading. The bottom valves 40 (40a to 40g) have the same structure, and are configured to be opened and closed by a driver's manual operation.

  The discharge ports 50 (50A to 50D) are provided on the left and right side surfaces and the rear portion of the tank truck 20 and communicate with the bottom valves 40a to 40g of the hatches 23a to 23g via unloading pipes 80A and 80B. . The unloading pipes 80A and 80B are formed to extend in the front-rear direction below the hatches 23a to 23g, and communicate with the outlets of the bottom valves 40a to 40g. Therefore, each fuel loaded in each hatch 23a-23g is sent to discharge ports 50A, 50B or 50C, 50D through unloading pipes 80A, 80B.

  In the present embodiment, one unloading pipe 80A is connected to the front hatches 23a to 23d and communicates with the discharge ports 50A and 50C, and the other unloading pipe 80B is connected to the rear hatches 23e to 23g. And connected to the discharge ports 50B and 50D.

  The unloading pipes 80A and 80B are provided with residual oil sensors 90A and 90B for detecting the remaining fuel. The residual oil sensors 90 </ b> A and 90 </ b> B are, for example, capacitive sensors, and output a detection signal to the unloading computer 30 when an oil liquid contacts the detection unit for a set value or more. In this embodiment, residual oil sensors 90A and 90B are provided upstream of the discharge ports 50A and 50B, and residual oil (residual liquid) in the unloading pipes 80A and 80B when the tank truck 20 is inclined in the left-right direction. Is provided at a position where it is easy to gather.

  Therefore, the residual oil detection accuracy by the residual oil sensors 90A and 90B is enhanced, and a detection signal is generated when a small amount of residual oil is collected in the unloading pipes 80A and 80B in a state where the tank truck 20 is tilted in either the left or right direction. Can be output. Further, it is not necessary to provide a large number of residual oil sensors in the unloading pipes 80A and 80B, and the residual oil detection accuracy is improved without increasing the number of sensors.

  The unloading valve 60 (60A to 60D) provided at the discharge port 50 (50A to 50D) is a manual open / close valve. When the tank truck 20 arrives at the filling station, an instruction from the unloading computer 30 is given. Based on this, the driver opens or closes the valve. Further, the unloading valve 60 (60A to 60D) is provided with an opening / closing detection sensor 62 (62A to 62D: valve opening detecting means) for detecting a valve opening operation and a valve closing operation. The open / close detection sensors 62 (62 </ b> A to 62 </ b> D) are provided so that the unloading valve 60 (60 </ b> A to 60 </ b> D) outputs a detection signal corresponding to the opening / closing operation to the unloading computer 30. Although not visible in FIG. 1, two discharge ports 50 and two open / close detection sensors 62 that are conceived to the discharge ports 50A and 50B and the open / close detection sensors 62A and 62B are also arranged on the opposite side surface of the tank truck 20 respectively.

  In addition, the driver's seat of the tank lorry vehicle 20 is provided with a level (inclination direction detecting means) 100 that detects the inclination direction of the tank lorry vehicle 20. The level 100 outputs a signal corresponding to the operation direction of the gyroscope to detect the tilt direction and tilt angle of the tank truck 20 and outputs the detection signal to the unloading computer 30.

  FIG. 2 is a perspective view showing an unloaded state of the tank truck. As shown in FIG. 2, an operation handle 42 (42 a to 42 g) of the bottom valve 40 (40 a to 40 g) is provided on the upper portion of the tank 22 of the tank truck 20.

  At the time of unloading, the driver confirms the type and quantity of fuel to be unloaded, and confirms the hatch number to be unloaded and the number of the underground tank (supplied container) at the filling station. Then, the driver connects one end of the unloading hose 110 to the discharge port 50A corresponding to the hatch number to be unloaded from the discharge ports 50 (50A to 50D), and connects the other end of the unloading hose 110 to the filling station side. To the lubrication pipe 120 corresponding to the underground tank number. Thereafter, the driver opens any one of the unloading valves 60A to 60D corresponding to the hatch number to be unloaded, and then goes up to the tank 22 of the tank truck 20 to determine the hatch number to be unloaded. The bottom handle 40 is opened by rotating the operation handle 42. As a result, the fuel loaded in the hatch 23 is unloaded into the underground tank of the filling station via the unloading hose 110.

  FIG. 3 is a perspective view showing an operation handle and a lock mechanism of the bottom valve. As shown in FIG. 3, the valve shafts 44 (44a to 44g) of the operation handles 42a to 42g are inserted into the hatches 23a to 23g and connected to the valve portions of the bottom valves 40 (40a to 40g). Yes. Therefore, the driver goes up to the top of each of the hatches 23a to 23g and manually opens any of the bottom valves 40a to 40g of the hatches 23a to 23g for unloading by operating any of the operation handles 42a to 42g. Let me speak.

  Further, the operation handles 42a to 42g are provided with bottom valve lock mechanisms 46 (46a to 46g) for restricting the rotation operation. The bottom valve locking mechanism 46 (46a to 46g) always locks (locks) the operation handles 42a to 42g so that the operation handles 42a to 42g cannot be rotated except when unloading. Operation is not possible without a processing completion signal. In other words, the hatch bottom valve 40 (40a to 40g) can be opened under at least one condition that the residual liquid processing completion signal is output. Conditions other than the residual liquid processing completion signal include conditions for checking the oil type in the hatch and underground tank (oil type match), and checking the overflow from comparing the hatch capacity with the free space in the underground tank. .

  The bottom valve locking mechanism 46 (46a to 46g) has an actuator 47 (47a to 47g) driven by a control signal from the unloading computer 30, and each operating handle is driven by the actuator 47 (47a to 47g). 42a-42g can be locked (latched) or unlocked (unlatched).

  Accordingly, the driver can rotate the operation handles 42a to 42g when the residual liquid processing completion signal is output by the control process of the unloading computer 30 and the operation handles 42a to 42g are unlocked. become. As described above, since the operation handles 42a to 42g are locked until the residual liquid processing completion signal is output from the unloading computer 30, the residual oil remaining in the unloading pipe 80 is erroneously discharged before discharging. The bottom valve 40 (40a-40g) cannot be opened.

  FIG. 4 is a block diagram showing each device connected to the unloading computer 30. As shown in FIG. 4, the unloading computer 30 includes a power switch 32, a liquid crystal monitor (LCD) 34, and a memory 36. The unloading computer 30 is connected to residual oil sensors 90A and 90B, unloading valves 60A to 60D, open / close detection sensors 62A to 62D, actuators 47a to 47g, and a speaker (notification means) 130.

  In the memory 36, when it is detected by the open / close detection sensors 62A to 62D that the unloading valves 60A to 60D are opened after it is detected that the unloading preparation stage has been entered. Then, it is detected that the liquid fuel that may remain in the unloading pipe 80 has been discharged, and a residual liquid processing completion signal is output to output the bottom valves 40a to 40a of the hatches 23a to 23g. A control program (discharge process detection means) for releasing the lock of 40 g is stored.

  When the unloading computer 30 detects that the unloading preparation start detection unit has entered the unloading preparation stage based on the control program (discharge process detection unit), the inclination direction detected by the level 100 is detected. And the liquid that may remain in the unloading pipe 80 when it is detected that the unloading valve 60 corresponding to the discharge port 50 arranged in the tilt direction is opened. It detects that the fuel discharge processing has been performed, and outputs a residual liquid processing completion signal.

  In addition, the memory 36 stores a control program (notification means) for notifying the unloading valve 60 in the tilt direction (lower side) detected by the level 100.

  The memory 36 also includes order data (type and quantity of fuel) ordered from the gas station and loading data (hatch number, unloading valve number, fuel type and quantity) loaded in each hatch at the tank. ) Etc. are stored in the unloading database.

  The unloading computer 30 extracts hatch numbers and unloading valve numbers corresponding to order data from the gas station from various control programs and an unloading database stored in the memory 36, and unloading control processing as will be described later. To do.

  FIG. 5 is a rear view of a tank truck that performs unloading on an inclined land. As shown in FIG. 5, for example, when the tank truck 20 arrives at the gas station and unloads, if the ground surface G is inclined at an angle θ with respect to the horizontal plane, the tank truck 20 is low on the left side, Stop while leaning so that the right side is higher. In this case, the residual oil is a relatively small amount, but collects at the lower left outlet 50A and does not flow to the right outlet 50A ′ which is higher than the outlet 50A.

  FIG. 6 is a rear view of the unloading piping of the tank truck. As shown in FIG. 6, the unloading pipe 80 </ b> A communicates with the unloading pipe 80 </ b> C extending in the lateral direction (left-right direction) of the tank 22. The unloading pipe 80C has a discharge port 50A (50B) disposed on the left side surface of the tank truck 20 at one end and a discharge port 50A ′ (50B ′) disposed on the right side surface of the tank truck 20 at the other end. ) Is provided. In FIG. 6, only the unloading pipe 80C communicated with the unloading pipe 80A is shown, but the unloading pipe 80B is similarly communicated with another unillustrated unloading pipe.

  In the vicinity of the discharge ports 50A and 50A ′, unloading valves 60A and 60A ′, open / close detection sensors 62A and 62A ′, and residual oil sensors 90A and 90A ′ are provided. Further, an unloading pipe 80A (80B) extending in the front-rear direction of the tank truck 20 is communicated with an intermediate portion of the unloading pipe 80C in the longitudinal direction.

  The unloading pipe 80 </ b> C is inclined to the left together with the tank truck 10. Therefore, the residual oil sensor 90A on the left side detects that the residual oil is collected at the left discharge port 50A. Further, since the residual oil does not collect at the discharge port 50A ′ disposed on the right side of the unloading pipe 80C, the residual oil is not detected by the right residual oil sensor 90A ′. When the tank truck 20 is parked horizontally, the left and right sides are at the same height, so that the amount of oil remaining at the discharge ports 50A and 50A ′ is dispersed almost uniformly. For this reason, the residual oil amount at the discharge ports 50A and 50A ′ is less than the detectable amount, and therefore no residual oil detection signal is output from the left and right residual oil sensors 90A and 90A ′.

  Here, the unloading control process executed by the unloading computer 30 will be described with reference to the flowchart of FIG. When the power switch 32 is turned on in S11 of FIG. 7, the unloading computer 30 determines that it has entered the unloading preparation stage and starts unloading control processing by the control program (unloading preparation start is started). Detection means). The unloading computer 30 repeats the control process shown in FIG. 7 when the power switch 32 is turned on, and ends the control process when the power switch 32 is turned off.

In the next S12, the inclination angle θ and the inclination direction of the tank truck 20 measured by the level 100 are read. (In the following description, as shown in FIG. 6, assuming that the tank lorry vehicle 20 is stopped in a state of being tilted to the left side, the discharge port that performs the unloading side is referred to as a left discharge port 50A.)
Subsequently, the process proceeds to S13, and the unloading valve 60A provided in the discharge port 50A in the inclination direction (lower side in the left-right direction) is searched. In the next S14, the identification data (unloading valve serial number) of the unloading valve 60A obtained from the search result is displayed on the liquid crystal monitor 34, and is also notified by sound from the speaker 130 (notification means). As a result, the driver can confirm the hatch number to be unloaded and the number of the unloading valve 60.

  Thereafter, the driver opens any one of the unloading valves 60A to 60D corresponding to the hatch number to be unloaded.

  In next S15, the detection signals from the open / close detection sensors 62A to 62D are read, and the low position corresponding to the unloading hatch number displayed on the liquid crystal monitor 34 among the unloading valves 60A to 60D (lower in the tilt direction). It is checked whether the side) unloading valve 60 is opened.

  In S15, when the unloading valve 60 at the lower position corresponding to the hatch number to be unloaded is not opened (in the case of NO), the process proceeds to S16, and the detection signals of the residual oil sensors 90A and 90B are read. It is checked whether or not residual oil is detected by the residual oil sensors 90A and 90B. In S16, when residual oil is detected by the residual oil sensors 90A and 90B (in the case of YES), since there is residual oil in the unloading pipe 80C, the process returns to S14, and the processes after S14 are repeated.

  In S15, when the unloading valve 60A at the lower position (lower side in the tilt direction) corresponding to the hatch to be unloaded is opened (in the case of YES), residual oil in the unloading pipe 80C is removed. Discharged. Thereby, the residual oil in the unloading pipe 80C is recovered from the discharge port 50A into a residual oil recovery container or the like. Therefore, the residual oil in the unloading pipe 80C is not unloaded into the underground tank, and contamination (mixing of different oil types) at the start of unloading is prevented.

  Thereafter, the process proceeds to S17, where it is checked whether or not a predetermined time set in advance has elapsed. As this predetermined time, for example, the time required for the fuel remaining in the unloading pipe 80C to be discharged is set.

  Further, in S17, when the predetermined time has not elapsed (in the case of NO), since the discharge of the residual oil has not yet been completed, the process proceeds to S18 to discharge the residual oil among the unloading valves 60A to 60D. It is checked whether or not the unloading valve 60 that has been opened is closed.

  In S18, when the opened unloading valve 60A is closed, the process returns to S14 in order to confirm the presence or absence of residual oil in the unloading pipe 80C. Repeat the process. In S18, when the opened unloading valve 60A is not closed (in the case of NO), there is a possibility that the discharge of the residual oil from the unloading pipe 80C has not been completed yet. Therefore, it returns to said S17 and repeats the process of S17 and S18.

  In S17, when a predetermined time has elapsed (in the case of YES), it is determined that the discharge of the residual oil from the unloading pipe 80C is completed, and the process proceeds to S19. In S <b> 19, a message for instructing the valve closing operation of the unloading valve 60 </ b> A is displayed on the liquid crystal monitor 34, and a voice instruction is issued from the speaker 130.

  Accordingly, the driver closes the unloading valve 60A and ends the residual oil discharging operation. In next S20, the detection signals from the open / close detection sensors 62A to 62D are read, and it is confirmed that the unloading valve 60A is closed.

  In S20, when the unloading valve 60A is not closed (in the case of NO), the processing of S19 is performed again so that the driver performs the closing operation of the unloading valve 60A. Instruct. In S20, when the unloading valve 60A is closed (in the case of YES), the process proceeds to S21, and a message for instructing the closing operation of the unloading valve 60A displayed on the liquid crystal monitor 34 is displayed. The display is erased and voice guidance from the speaker 130 is stopped. Thereafter, the process proceeds to S16, and the detection signals of the residual oil sensors 90A and 90B are read as described above, and it is checked whether the residual oil is detected by the residual oil sensors 90A and 90B.

In S16, when residual oil is detected by the residual oil sensors 90A and 90B (in the case of YES), the process returns to S14 and the processes of S14 to S21 are repeated. Thereby, the residual oil of 80 C of unloading piping can be discharged | emitted reliably. (The processes of S12, S13, and S17 to S21 come to the discharge process detecting means of claim 2.)
In S16, if residual oil is not detected by the residual oil sensors 90A and 90B (in the case of NO), the process proceeds to S22, and the liquid crystal monitor 34 indicates that the residual oil discharge process (residual liquid discharge process) has been completed. A message is displayed and a residual liquid processing completion signal for the hatch is output. As a result, the driver can confirm that the residual oil discharging process of the unloading pipe 80C has been completed. (The above S15, S16, and S22 come to the discharge processing detection means of claim 1)
Thereafter, the driver of the tank truck 20 connects one end of the unloading hose 110 to the discharge port 50A from which the residual oil has been removed, and the other end of the unloading hose 110 corresponds to the underground tank number on the filling station side. It connects with the oil supply pipe | tube 120 (refer FIG. 2).

  Subsequently, in S23, an unloading confirmation process is performed in which the type (oil type) of the fuel to be unloaded is confirmed and whether there is an abnormality such as the presence or absence of an overflow from a comparison between the capacity of the underground tank and the hatch capacity. This unloading confirmation process is performed by the unloading computer 30, but since the process itself is known, its description is omitted.

  Then, in addition to the condition that the residual liquid processing completion signal is output in S22, and in the unloading confirmation processing in S23, when it is confirmed that there are no other conditions, the bottom valve locking mechanism 46 ( The actuators 47a to 47g of 46a to 46g) are driven to unlock the operation handles 42a to 42g of all the bottom valves 40a to 40g. Accordingly, the driver can start unloading by rotating the operation handle 42 of the bottom valve 40 corresponding to the hatch number to be unloaded from the bottom valves 40a to 40g in the valve opening direction. Become. As a result, the unloading operation (bottom valve opening operation) of the fuel in the hatch corresponding to the hatch number by the driver is performed, so that the unloading from the hatch to the underground tank is performed.

  In next S25, the detection signals of the open / close detection sensors 62A to 62D and the residual oil sensors 90A and 90B are read to check whether or not the fuel in the hatch 23 has been unloaded. In this embodiment, the unloading valve 60A is closed by the open / close detection sensor 62A provided in the vicinity of the discharge port 50A during unloading, and the remaining oil sensor 90A does not detect the remaining oil. Thus, it is detected that the unloading of the fuel in the hatch 23 has been completed. Accordingly, in S25, when the detection signals from the opening / closing detection sensor 62A and the residual oil sensor 90A provided in the vicinity of the discharge port 50A being unloaded are not output among the opening / closing detection sensors 62A to 62D, the hatch 23 It is detected that unloading has not been completed, and in this case (in the case of NO), the processing of S25 is repeated.

  In S25, when the detection signals from the open / close detection sensor 62A and the residual oil sensor 90A provided in the vicinity of the discharge port 50A during unloading are not output among the open / close detection sensors 62A to 62D (in the case of YES), It is determined that the unloading of the hatch 23 has been completed, and the process proceeds to S26.

  On the other hand, when the driver determines that the unloading from the hatch 23 has been completed by confirming that the change in the liquid level detected by the liquid level gauge in the underground tank has stopped, the unloading is performed. The operation valve 60 is closed, and the bottom valve 46 of the hatch 23 is closed.

  In S26, an unloading completion signal is output, and the actuators 47a to 47g of the bottom valve locking mechanism 46 (46a to 46g) are driven to lock the operation handles 42a to 42g of all the bottom valves 40a to 40g so that they cannot be opened. .

  Thereafter, when unloading the other hatch 23, the driver switches the connection of the unloading hose 110 after discharging the remaining oil from the other discharge ports while the power switch 32 is turned on. . In the unloading computer 30, when the power switch 32 is on, the processes of S11 to S26 are repeated.

  Thus, before unloading, it is possible to detect that the residual oil discharge processing of the unloading pipe 80C has been performed by the processing of S15 and S16 (discharge processing detection means). It is possible to reliably discharge the residual oil from the pipe 80 </ b> C, and to prevent contamination in the underground tank at the start of unloading (different oil type mixing accident).

  In the above embodiment, the case where the tank truck unloads to the underground tank of the gas station has been described as an example. Of course, the invention can be applied.

  In the above embodiment, the fuel unloaded from the tank truck is described as oil. However, it goes without saying that the present invention can be applied to other liquid fuels.

  In the above embodiment, as a method for confirming that the unloading preparation has been started, it has been confirmed whether or not the power switch of the unloading computer has been turned on. When the engine is stopped, or when it is confirmed that the vehicle has arrived at the target gas station based on the position data of GPS (Global Positioning System) mounted on the tank truck, or the unloading computer of the tank truck uses the liquid level in the underground tank The case where the data has been read may be regarded as having entered the unloading preparation stage, and it may be determined that the unloading preparation has started. Furthermore, prior to unloading, information on the fuel that was provided for each tank truck and loaded in each hatch of the tank truck (vehicle number type, quantity, destination, vehicle for identifying the tank truck) In an unloading system of a type in which a card (information storage medium) storing a number or the like is read by a card reader provided in the unloading computer, it is detected that the unloading computer has read the card data. It may be determined that the unloading preparation stage has started and the unloading preparation has started.

  Further, in the above embodiment, the case where the lock mechanism 46 of the operation handle 42 of the bottom valve 40 is unlocked when the residual liquid processing completion signal is output has been described as an example. It is also possible to provide an open / close cover member that covers the operation handle 42 and a lock mechanism that locks the open / close operation of the open / close cover member to release the lock (locking state) of the open / close cover member.

  In the above embodiment, when the residual liquid processing completion signal is output, the lock mechanism 46 that holds the bottom valve 40 inoperable is released, that is, the lock mechanism 46 is released and the driver releases the lock. The bottom valve 40 can be opened by allowing manual operation of the operation handle 42. However, instead of the bottom valve 40 that is driven to open and close by manual operation, for example, a supply of compressed air or a valve that is electrically opened and closed may be adopted for the bottom valve 40. Under the condition that the completion signal is input, the bottom valve 40 may be driven to open and close by supplying compressed air or electricity.

  In the above embodiment, the unloading pipe 80 is provided with the residual oil sensors 90A and 90B, and in addition to the residual liquid discharge processing detecting means, the residual oil sensors 90A and 90B also contain the residual oil in the unloading pipe 80. By detecting whether or not the liquid is present, it is detected whether or not the residual liquid in the unloading pipe 80 has been processed. However, the residual oil sensors 90A and 90B are provided. In addition, it is possible to more reliably detect whether or not the residual oil discharge process has been performed, and it is needless to say that the residual oil sensors 90A and 90B are not essential components of the present invention.

It is a block diagram which shows typically one Example of the unloading system of the tank lorry vehicle by this invention. It is a perspective view which shows the unloading state of a tank truck. It is a perspective view which shows the operation handle and lock mechanism of a bottom valve. 3 is a block diagram showing each device connected to an unloading computer 30. FIG. It is the figure which looked at the tank truck from the back which unloads on the slope. It is the figure which looked at the piping for unloading of a tank truck from the rear. It is a flowchart for demonstrating the unloading control process which the unloading computer 30 performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Unloading system 20 Tank truck 22 Tank 23 (23a-23g) Hatch 30 Unloading computer 32 Power switch 34 Liquid crystal monitor (LCD)
36 Memory 40 (40a-40g) Bottom valve 42 (42a-42g) Operation handle 46 (46a-46g) Bottom valve lock mechanism 47 (47a-47g) Actuator 50 (50A-50D) Discharge port 60 (60A-60D) Unloading Valve 62 (62A to 62D) Open / close detection sensor (valve open detection means)
80 (80A-80C) Unloading piping 90A, 90B Residual oil sensor 100 Level (tilt direction detecting means)
110 Unloading hose 130 Speaker (notification means)

Claims (4)

A tank truck with liquid fuel loaded in the hatch arrives at the delivery destination, and one end of the hatch is provided at the other end of the unloading pipe connected to the bottom of the hatch, and the liquid fuel is After connecting with an oil filling port of a supplied container to be supplied by an unloading hose, the bottom valve provided in the hatch is opened to unload liquid fuel from the hatch to the supplied container. In a tanker truck unloading system
An unloading valve provided in the vicinity of the discharge port;
Valve opening detecting means for detecting that the unloading valve is opened;
Unloading preparation start detecting means for detecting that the unloading preparation stage before opening the unloading valve is entered;
After the unloading preparation start detecting means detects that the unloading preparation stage has been entered, the unloading detection means detects that the unloading valve has been opened. A discharge process detection means for detecting that a discharge process of liquid fuel that may remain in the pipe for use has been performed, and outputting a residual liquid process completion signal;
A tank lorry unloading system characterized by comprising The tank lorry vehicle has outlets for the hatch on the left and right of the tank lorry vehicle, and includes an inclination direction detection means for detecting an inclination direction of the tank lorry vehicle,
When the discharge processing detection means detects that the unloading preparation start detection means has entered the unloading preparation stage, the discharge processing detection means reads the inclination direction detected by the inclination direction detection means, When it is detected that the unloading valve corresponding to the arranged discharge port has been opened, the liquid fuel that may remain in the unloading pipe has been discharged. The tank lorry vehicle unloading system according to claim 1, wherein a residual liquid processing completion signal is output.   3. The unloading system for a tank truck according to claim 2, wherein the discharge processing detecting means includes notifying means for notifying the unloading valve in the tilt direction detected by the tilt direction detecting means.   4. The valve according to claim 1, wherein the bottom valve of the hatch can be opened under at least one condition that a residual liquid processing completion signal is output from the discharge processing detection unit. 5. Tanker truck unloading system.

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