JP2012233813A - Automatic measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring device for a low-temperature liquefied gas supply quantity, the device capable of automatically and reliably measuring the supplied amount of the low-temperature liquefied gas from a tank lorry to a supply destination.SOLUTION: A measuring device, which measures a supply quantity of low-temperature liquefied gas loaded in a tank of a tank lorry when the same is supplied to a supply destination, comprises: a strain sensor which detects a strain amount of a wheel axis caused by a change in a quantity of the low-temperature liquefied gas in the tank; control means which has calculation means for calculating a weight change in the low-temperature liquefied gas on the basis of the strain amount detected by the strain sensor; detection means which detects a change in any of an open/close state of a door of an operation room storing equipment used in supplying the low-temperature liquefied gas to the supply destination, an operation state of a low-temperature liquefied gas pump, an open/close state of a liquid feeding valve, and a temperature of a supply piping system. The control means determines a supply quantity of the low-temperature liquefied gas by calculating, using the calculation means, a weight change of the low-temperature liquefied gas during a period from when the detection means detects a supply start state to when the same detects a supply end state.

Description

  The present invention relates to a metering device, and more particularly to a device for automatically metering the amount of low-temperature liquefied gas supplied when a low-temperature liquefied gas loaded in a tank truck is supplied to a supply destination.

  When supplying low-temperature liquefied gas such as liquefied nitrogen to the storage tank at the supply destination, the low-temperature liquefied gas is transported to the vicinity of the storage tank with a tank truck mounted in the tank, and the charge hose is connected to the storage tank to cool the liquid in the tank. Gas is supplied to the storage tank. At this time, in order to measure the supply amount (dispensing amount, delivery amount or transaction amount) of low-temperature liquefied gas in front of the supply destination, automatic equipped with a function to convert the distortion amount of the tank truck axle to the low-temperature liquefied gas supply amount A weighing device has been proposed (see, for example, Patent Document 1).

  The automatic metering device is provided with a metering start button and a metering end button as operation buttons for instructing the metering start and metering end to an external controller attached to the automatic metering device, and in a tank truck equipped with a low temperature liquefied gas pump. Before starting the low-temperature liquefied gas pump, and before opening the liquid supply valve in a tank truck that is not equipped with a low-temperature liquefied gas pump, each tank truck crew member starts measuring by pressing the measurement start button. After stopping, or after closing the liquid feed valve, the metering end button is pressed to stop the metering, and the supply of low-temperature liquefied gas from the change in axle distortion from the start of metering to the end of metering. The amount is calculated.

JP 2006-64636 A

  In the measurement of the supply amount of the low-temperature liquefied gas, in order to use the measured supply amount as a commercial transaction quantity, it is required to accurately measure the supply amount of the low-temperature liquefied gas. However, in the case of the automatic weighing device described in Patent Document 1, if the crew member of the tank truck forgets to press the weighing start button or the weighing end button of the automatic weighing device, the transaction quantity becomes unknown, and commercial transaction becomes impossible. It will end up. In order to prevent forgetting to press each button, there may be a function to call attention to forgetting to press by blinking each button, but since it is only a warning, it completely eliminates the human error of the crew It is not possible. In addition, the automatic metering device must be operated almost simultaneously with the operation of the low-temperature liquefied gas pump and the liquid supply valve, and the operation becomes complicated.

  Accordingly, an object of the present invention is to provide a low temperature liquefied gas supply amount measuring device capable of automatically and reliably measuring the amount of low temperature liquefied gas supplied from a tank truck to a supply destination.

  In order to achieve the above object, a first configuration of the measuring device of the present invention is a measuring device for measuring a supply amount when supplying a low temperature liquefied gas mounted in a tank of a tank truck to a supply destination. A control unit having a strain sensor for detecting the amount of distortion of the axle caused by the change in the amount of the low-temperature liquefied gas, and a calculation unit for calculating the weight change of the low-temperature liquefied gas based on the change in the amount of strain detected by the strain sensor; Door opening / closing state detecting means for detecting an open / closed state of a door of an operation chamber containing equipment used when supplying the low-temperature liquefied gas to a supply destination, and the control means includes the door opening / closing state detecting means A change in the weight of the low-temperature liquefied gas by the calculating means is calculated from when the open state of the door of the operation chamber is detected to when the closed state of the door is detected.

  According to a second configuration of the metering device of the present invention, there is provided a metering device for measuring a supply amount when supplying a low temperature liquefied gas mounted in a tank of a tank truck to a supply destination using a low temperature liquefied gas pump. A control means having a strain sensor for detecting the amount of distortion of the axle caused by the change in the amount of liquefied gas, and a calculation means for calculating a weight change of the low-temperature liquefied gas based on the change in the amount of strain detected by the strain sensor; A pump operating state detecting means for detecting an operating state of the low-temperature liquefied gas pump, and the control means detects that the stop detecting means operates the low-temperature liquefied gas pump when the operation start detecting means detects the start of operation of the low-temperature liquefied gas pump. The weight change of the low-temperature liquefied gas by the calculating means is calculated until the stop is detected.

  According to a third configuration of the metering device of the present invention, in the metering device for measuring the supply amount when the low-temperature liquefied gas mounted in the tank of the tank truck is supplied to the supply destination via the liquid feeding valve, the low-temperature in the tank A control means having a strain sensor for detecting the amount of distortion of the axle caused by the change in the amount of liquefied gas, and a calculation means for calculating a weight change of the low-temperature liquefied gas based on the change in the amount of strain detected by the strain sensor; Valve opening / closing state detecting means for detecting the opening / closing state of the liquid delivery valve, and the control means detects that the valve opening / closing state detection means is not in the fully closed state or that the valve opening / closing state is detected. From when the means detects that the opening of the liquid delivery valve exceeds a preset opening, until the valve open / close state detection means detects that the liquid delivery valve is fully closed. , Said operation It is characterized by calculating the change in weight of low-temperature liquefied gas by stage.

  According to a fourth configuration of the metering device of the present invention, in the metering device for measuring the supply amount when the low-temperature liquefied gas mounted in the tank of the tank truck is supplied to the supply destination through the supply piping system, A control unit having a strain sensor for detecting the amount of distortion of the axle caused by the change in the amount of the low-temperature liquefied gas, and a calculation unit for calculating the weight change of the low-temperature liquefied gas based on the change in the amount of strain detected by the strain sensor; A temperature detecting means for detecting the temperature of the supply piping system, and a door open / closed state detecting means for detecting an open / closed state of a door of an operation chamber containing a device used when supplying low temperature liquefied gas to a supply destination, or Pump stop detection means for detecting the operating state of a low-temperature liquefied gas pump that operates when supplying low-temperature liquefied gas to the supply destination, or a liquid feed valve that opens and closes when supplying low-temperature liquefied gas to the supply destination A valve opening / closing state detecting means for detecting a closed state, and the control means from when the temperature detecting means detects a preset temperature until the door opening / closing state detecting means detects a door closed state. Or until the pump operating state detecting means detects the operation stop of the low temperature liquefied gas pump or until the valve open / closed state detecting means detects the fully closed state of the liquid supply valve. It is characterized by calculating the weight change of the liquefied gas.

  Furthermore, in the weighing device according to the present invention, in the weighing device having each configuration described above, the control unit includes information including a supply amount of the low-temperature liquefied gas to the supply destination calculated by the calculation unit from a change in weight of the low-temperature liquefied gas. It is characterized by having a slip issuing means for printing and issuing

  According to the weighing device of the present invention, an external operation for instructing the measurement start and the measurement end in the weighing device is unnecessary, and it is possible to prevent a human error such as forgetting to press the operation button. Enables commercial transactions with in-place weighing. In addition, since the metering is automatically started and stopped in accordance with the operations and state changes that are inevitably performed when supplying the low-temperature liquefied gas, there is no need to operate the operation buttons. Can reduce the burden on the crew. Further, by providing slip issuing means in the weighing device, the traded supply amount can be printed on the spot and issued, enabling accurate and quick transactions.

It is a block diagram which shows one example of a measuring device of this invention. It is a schematic block diagram which shows an example of the tank truck which can apply the measuring device of this invention. It is a schematic block diagram which shows the other example of the tank truck which can apply the measuring device of this invention.

  First, a tank lorry 11 shown in FIG. 2 includes a cabin (operator) 12, a tank 13 filled with a low-temperature liquefied gas, a low-temperature liquefied gas pump 15 operated when the low-temperature liquefied gas is supplied to a storage tank 14 as a supply destination, An operation chamber 17 in which the liquid supply valve 16 is accommodated and a plurality of front, rear, left and right wheels 18 are provided, and a measuring device 19 is provided at an appropriate position such as the interior of the cabin 12 or the interior of the operation chamber 17. Yes. Each axle 20 that rotatably supports each wheel 18 is provided with a strain sensor 21 that detects a strain amount of each axle 20 caused by a change in the weight of the low-temperature liquefied gas in the tank 13.

  As shown in FIG. 1, the weighing device 19 includes a plurality of the strain sensors 21 and calculation means for calculating a weight change of the low-temperature liquefied gas in the tank 13 based on a change in the strain amount detected by the strain sensor 21. And a detection means 23 for detecting an operation that is inevitably performed when the low-temperature liquefied gas is supplied from the tank lorry 11 to the storage tank 14 and a state change associated with the operation.

  The control means 22 instructs the calculation operation start and calculation operation end of the calculation means based on the signal from the detection means 23, and the calculation means is the start time detected by the strain sensor 21 at the start of the calculation operation. The weight change of the low-temperature liquefied gas mounted on the tank truck 11 is calculated from the strain quantity and the end-time strain quantity detected by the strain sensor 21 at the end of the arithmetic operation, and the calculated weight change is supplied from the tank truck 11 to the supply destination storage tank 14. The supply amount of the low-temperature liquefied gas supplied to.

  When supplying low-temperature liquefied gas from the tank lorry 11 to the storage tank 14, the crew of the tank lorry 11 stops the tank lorry 11 near the storage tank 14, opens the door 24 of the operation chamber 17, and is disposed in the operation chamber 17. The supply pipe 25 and the storage tank 14 are connected by a charge hose 26. Next, the operation switch of the low temperature liquefied gas pump 15 is operated to start the low temperature liquefied gas pump 15 to start the liquid feeding operation and open the liquid feeding valve 16 to start the supply of the low temperature liquefied gas from the tank truck 11 to the storage tank 14. To do. When the supply of the low-temperature liquefied gas is terminated, the low-temperature liquefied gas pump 15 is stopped, the liquid supply valve 16 is closed, the charge hose 26 is removed and stored in a predetermined position, and then the door 24 of the operation chamber 17 is closed.

  The detection means 23 is capable of detecting operations and state changes that are inevitably performed when the low-temperature liquefied gas is supplied from the tank truck 11 to the storage tank 14 as described above. As a first example of the detecting means 23, a door open / closed state detecting means for detecting the open / closed state of the door 24 of the operation chamber 17 can be cited. The door open / close state detecting means detects the open / closed state of the door 24 by a limit switch, a proximity sensor or the like, and the control means 22 detects when the door open / closed state detecting means as the detecting means 23 detects the open state of the door 24. The calculation means is instructed to start calculation operation, and when the door open / close state detection means detects the closed state of the door 24, the calculation means is instructed to end calculation operation.

  As a result, the control means 22 performs a metering operation based on the open / closed state of the door 24 of the operation chamber 17, which is one of the operations that must be performed when the low-temperature liquefied gas is supplied from the tank truck 11 to the storage tank 14, and the door open / closed state. When the detection means detects that the door 24 of the operation chamber 17 is in the open state, the strain amount at the start detected by the strain sensor 21 and the strain sensor 21 when it detects that the door 24 is in the closed state. The calculation means calculates the weight change of the low-temperature liquefied gas in the tank 13 on the basis of the change in strain amount between the end-time strain amount detected by the and the calculated weight change amount from the tank truck 11 to the storage tank 14. Of low-temperature liquefied gas.

  As a second example of the detection means 23, there can be cited a pump operation state detection means capable of detecting the start and stop of the operation of the low-temperature liquefied gas pump 15. This pump operation state detection means can detect the start and stop of operation of the low-temperature liquefied gas pump 15, for example, ON / OFF of an operation switch provided in the motor power circuit for driving the low-temperature liquefied gas pump 15, What detects the state of the electric current and voltage of the said power supply circuit, or detects the rotation state of the drive shaft of the low temperature liquefied gas pump 15 can be used. The control means 22 instructs the calculation means to start the calculation operation when the pump operation state detection means which is the detection means 23 detects the start of operation of the low temperature liquefied gas pump 15. When the operation stop is detected, the calculation means is instructed to end the calculation operation.

  As a result, the control means 22 performs the metering operation based on the operating state of the low temperature liquefied gas pump 15 which is one of the operations that must be performed when the low temperature liquefied gas is supplied from the tank truck 11 having the low temperature liquefied gas pump 15 to the storage tank 14. And when the pump operation state detecting means detects the start of operation of the low temperature liquefied gas pump 15, the strain amount at the start detected by the strain sensor 21 and when the pump operation state detecting means detects the stop of operation of the low temperature liquefied gas pump 15. Based on a change in strain amount between the end strain amount detected by the strain sensor 21, the calculation means calculates a weight change of the low-temperature liquefied gas in the tank 13, and the calculated weight change amount is calculated from the tank truck 11. The amount of low-temperature liquefied gas supplied to the storage tank 14 is used.

  As a third embodiment of the detection means 23, there can be mentioned a valve open / close state detection means for detecting the open / close state of the liquid delivery valve 16. This valve open / close state detecting means uses means capable of detecting whether or not the liquid supply valve 16 is in a fully closed state, and when supplying the low-temperature liquefied gas from the tank truck 11 to the storage tank 14, The control means 22 may determine that the supply of the low-temperature liquefied gas is started when the valve is opened from the fully closed state toward the opening direction and is not in the fully closed state, and the liquid supply valve 16 is in the fully closed state. A combination of means for detecting the presence and means for detecting that the opening of the liquid delivery valve 16 exceeds a preset opening is used to supply the low-temperature liquefied gas from the tank truck 11 to the storage tank 14. At this time, even if the liquid feeding valve 16 is opened from the fully closed state toward the opening direction, and the control means 22 determines that the low-temperature liquefied gas supply starts when the opening degree exceeds a preset opening degree. Good. On the other hand, the determination of the end of the supply of the low-temperature liquefied gas may be made in any case when the liquid supply valve 16 that has been opened is fully closed.

  For example, when supplying a low-temperature liquefied gas from the tank truck 11 to the storage tank 14, a pre-cooling operation for cooling a piping system in an atmospheric temperature state such as the supply pipe 25 and the charge hose 26 to a low-temperature liquefied gas temperature is performed by a liquid supply valve. 16 is opened to the valve opening set for the pre-cooling operation, and when the liquid-feeding valve 16 is opened to the valve opening for supplying the low-temperature liquefied gas after the pre-cooling operation is completed, normally it is set for pre-cooling. It is not determined that the supply of the low-temperature liquefied gas is started until the valve opening is reached, but it is determined that the supply of the low-temperature liquefied gas is started when the liquid supply valve 16 is opened beyond the valve opening set for pre-cooling. Can be set to.

  The control means 22 detects when the valve opening / closing state detection means, which is the detection means 23, detects that the liquid supply valve 16 is in the open state instead of the fully closed state, or the liquid supply valve 16 is in the fully closed state. When the valve opening operation is performed in the opening direction and the valve opening state exceeding a preset opening degree is detected, the calculation means is instructed to start the calculation operation, and the valve open / close state detection means supplies the liquid. When the fully closed state of the valve 16 is detected, the calculation means is instructed to end the calculation operation. As a result, the control means 22 performs a metering operation based on the open / close state of the liquid supply valve 16 which is one of the operations that must be performed when the low-temperature liquefied gas is supplied from the tank truck 11 to the storage tank 14, and the valve open / close state detecting means. The strain sensor 21 detects when the strain sensor 21 detects the opening state of the liquid delivery valve 16 and when the valve open / close state detection means detects the fully closed state of the liquid delivery valve 16. The calculation means calculates the weight change of the low-temperature liquefied gas in the tank 13 on the basis of the change in strain amount between the end strain amount and the calculated weight change amount from the tank truck 11 to the storage tank 14 at a low temperature. The amount of liquefied gas supplied.

  Further, as the fourth embodiment of the detecting means 23, the temperature detecting means for detecting the temperature of the supply piping system provided for supplying the low temperature liquefied gas to the supply destination, and the first embodiment shown above. A combination of the door opening / closing state detection means, the pump operation state detection means shown in the second embodiment, and the valve opening / closing state detection means shown in the third embodiment may be combined.

  As described above, the temperature detection means opens the door 24 of the operation chamber 17, connects the supply pipe 25 in the operation chamber 17 and the storage tank 14 with the charge hose 26, operates the low-temperature liquefied gas pump 15, and supplies liquid. When the valve 16 is opened and the supply of the low-temperature liquefied gas from the tank lorry 11 to the storage tank 14 is started, the temperature of the portion where the temperature is lowered from the atmospheric temperature to the low-temperature liquefied gas temperature by being cooled in contact with the low-temperature liquefied gas. When the temperature of the temperature detection target part reaches a temperature set between the normal atmospheric temperature or lower and the low temperature liquefied gas temperature, the control means 22 determines that the supply of the low temperature liquefied gas is started. To do. The temperature set in the temperature detection means can be set to an appropriate temperature according to the type of the low-temperature liquefied gas to be supplied and the configuration of the supply piping system. Usually, it may be set to the low-temperature liquefied gas temperature. However, it is also possible to set the intermediate temperature higher than the low temperature liquefied gas temperature such as −50 ° C. and −100 ° C.

  In addition, as a temperature detection target part, a temperature detection unit is securely attached by selecting a device or a pipe fixed to the tank truck 11 such as the low temperature liquefied gas pump 15, the liquid feed valve 16, and the supply pipe 25. Can do.

  When the temperature detection means, which is the detection means 23, detects that the temperature of the temperature detection target portion has decreased to a preset temperature, the control means 22 instructs the calculation means to start a calculation operation, and the door open / close state When the detecting means detects the closed state of the door 24, or when the pump operating state detecting means detects the stop of the operation of the low temperature liquefied gas pump 15, or the valve open / closed state detecting means detects the fully closed state of the liquid feeding valve 16. When detected, the calculation means is instructed to end the calculation operation.

  As a result, the control means 22 starts the metering operation based on the temperature change state of the supply piping system, which is one of the state changes that always occur when the operation of supplying the low-temperature liquefied gas from the tank truck 11 to the storage tank 14 is performed. When the temperature detecting means detects a temperature drop, the strain amount at the start detected by the strain sensor 21 and when the door open / close state detecting means detects the closed state of the door 24, or when the pump operating state detecting means is at a low temperature. Change in strain amount between the end strain amount detected by the strain sensor 21 when the stop of the operation of the liquefied gas pump 15 is detected or when the valve open / close state detecting means detects the fully closed state of the liquid supply valve 16. The calculation means calculates the weight change of the low-temperature liquefied gas in the tank 13 and sets the calculated weight change amount as the supply amount of the low-temperature liquefied gas from the tank truck 11 to the storage tank 14.

  Further, when the control means 22 includes the slip issuing means 27, the calculation means prints on the slip information including the supply amount of the low-temperature liquefied gas to the supply destination calculated from the weight change of the low-temperature liquefied gas. Can be issued. That is, after the supply of the low-temperature liquefied gas from the tank truck 11 to the storage tank 14 is completed, a slip on which necessary information is printed can be issued on the spot. Information including the amount of cryogenic liquefied gas supplied includes the measured amount of cryogenic liquefied gas, as well as the name of the supplier and supplier, the type of cryogenic liquefied gas, date and time, location, name of person in charge, etc. Various information necessary for supplying the low-temperature liquefied gas to 14 can be appropriately selected.

  In each of the above embodiments, the description has been made based on the tank lorry 11 equipped with the low-temperature liquefied gas pump 15 shown in FIG. 2, but as shown in FIG. 3, the operation of the low-temperature liquefied gas pump 15 is also applied to the tank lorry not equipped with the low-temperature liquefied gas pump. The present invention can be applied except for the pump operation state detection means that can detect the start and the operation stop, and similarly, the supply amount of the low-temperature liquefied gas from the tank truck to the storage tank can be calculated and the delivery slip can be issued. Further, in the case of a self-pressurizing tank truck equipped with a heat exchanger (evaporator) instead of a low-temperature liquefied gas pump, a heat exchanger can be targeted as a temperature detection target portion of the temperature detection means. In FIG. 3, the same components as those in the tank truck shown in FIG. Further, when supplying the low-temperature liquefied gas from the tank lorry 11 to the storage tank 14, a detailed description of operations normally performed by those skilled in the art, such as a purge operation in a pipe or a charge hose, is omitted.

  DESCRIPTION OF SYMBOLS 11 ... Tank lorry, 12 ... Cabin, 13 ... Tank, 14 ... Storage tank, 15 ... Cryogenic liquefied gas pump, 16 ... Liquid feed valve, 17 ... Control room, 18 ... Wheel, 19 ... Automatic metering device, 20 ... Axle, 21 ... Distortion Sensor, 22 ... Control means, 23 ... Detection means, 24 ... Door, 25 ... Supply piping, 26 ... Charge hose, 27 ... Slip issuing means

Claims (5)

  In a measuring device for measuring a supply amount when supplying a low temperature liquefied gas mounted in a tank of a tank truck to a supply destination, a strain sensor for detecting a distortion amount of an axle caused by a change in the amount of the low temperature liquefied gas in the tank, A control means having a calculation means for calculating a change in weight of the low-temperature liquefied gas based on a change in the amount of strain detected by the strain sensor, and an operation in which equipment used for supplying the low-temperature liquefied gas to a supply destination is stored. Door opening / closing state detecting means for detecting the opening / closing state of the door of the chamber, and the control means detects the closed state of the door from when the door opening / closing state detecting means detects the opening state of the door of the operation chamber. A measuring device for calculating the weight change of the low-temperature liquefied gas by the calculating means.   In a measuring device for measuring the supply amount when supplying a low temperature liquefied gas mounted in a tank of a tank truck to a supply destination using a low temperature liquefied gas pump, the amount of axle distortion caused by a change in the amount of low temperature liquefied gas in the tank is measured. A strain sensor to detect, a control means having calculation means for calculating a weight change of the low-temperature liquefied gas based on a change in the amount of strain detected by the strain sensor, and a pump operating state for detecting an operating state of the low-temperature liquefied gas pump The control means, from when the pump operation state detection means detects the start of operation of the low temperature liquefied gas pump until the pump operation state detection means detects the operation stop of the low temperature liquefied gas pump, A measuring device for calculating a weight change of the low-temperature liquefied gas by the calculating means.   In the measuring device for measuring the supply amount when supplying the low temperature liquefied gas mounted in the tank of the tank truck to the supply destination via the liquid supply valve, the distortion amount of the axle caused by the change of the low temperature liquefied gas amount in the tank is measured. A strain sensor to detect, a control means having a calculation means for calculating a weight change of the low-temperature liquefied gas based on a change in the amount of strain detected by the strain sensor, and a valve open / closed state for detecting an open / closed state of the liquid supply valve Detecting means, wherein the valve opening / closing state detecting means determines that the liquid supply valve is not fully closed, or the valve open / closed state detecting means sets the opening degree of the liquid supply valve in advance. Until the valve opening / closing state detecting means detects that the liquid supply valve is fully closed until the valve opening / closing state is detected, the change in weight of the low-temperature liquefied gas by the calculating means is detected. Calculation That the metering device.   In a measuring device that measures the supply amount when supplying low temperature liquefied gas mounted in a tank of a tank truck to a supply destination via a supply piping system, the amount of distortion of the axle caused by the change in the amount of low temperature liquefied gas in the tank A temperature sensor that detects a temperature of the supply piping system, a strain sensor that detects the temperature, a control unit that calculates a weight change of the low-temperature liquefied gas based on a change in the amount of strain detected by the strain sensor, and And open / closed state detection means for detecting the open / closed state of the door of the operation room containing the equipment used when supplying the low temperature liquefied gas to the supply destination, or operating when supplying the low temperature liquefied gas to the supply destination Operating state detection means for detecting the operating state of the low-temperature liquefied gas pump, or valve open / closed state detecting means for detecting the open / closed state of the liquid supply valve that opens and closes when supplying the low-temperature liquefied gas to the supply destination The control means until the door open / close state detecting means detects a closed state of the door from when the temperature detecting means detects a preset temperature, or the pump operating state detecting means is A measuring device that calculates a change in the weight of the low-temperature liquefied gas by the calculating means until the stop of the operation of the low-temperature liquefied gas pump is detected or until the valve opening / closing state detecting means detects the fully closed state of the liquid supply valve. .   The control means includes slip issuing means for printing and issuing information including a supply amount of the low-temperature liquefied gas to the supply destination calculated by the calculating means from a change in weight of the low-temperature liquefied gas. The automatic weighing device according to any one of 1 to 4.

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