JP2006131311A - Port loading and unloading crane control device and port loading and unloading crane system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a port loading and unloading crane control device and a port loading and unloading crane system capable of effectively using natural energy. <P>SOLUTION: This port loading and unloading crane control device is provided with a converter device 2, an inverter device 3, an alternating current motor 4 for driving a crane main operation mechanism, and an alternating current motor driving operation switch 5a that is closed when driving the motor, and alternating current power is supplied to an auxiliary machine load, and the converter device and the inverter device are provided with re-generating functions. The port loading and unloading crane control device is also provided with a direct current generator 7 connected to the secondary side of the converter device to convert natural energy to electric energy and to supply it to a direct current circuit provided on the secondary side of the converter device, a diode 8 for preventing the reverse flow of direct current power obtained by the direct current generator, a direct current generator switch 5b for switching operations between a time when loading and unloading and a time when using power generated by natural energy, and a storage battery 9 connected to the secondary side of the converter device to store the direct current generating power by natural energy. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a harbor cargo handling crane control apparatus and a harbor cargo handling crane system that have a power generator using natural energy and that can use the generated power for other devices, sell it, or charge a storage battery for effective use. Is.

In conventional cargo handling cranes, the device configuration for driving and controlling the AC motor for the crane main operation, for example, as shown in FIG. 5, the AC power P _S supplied from the AC power supply 1 into DC power P _DC Converter device 2 for conversion, inverter device 3 for converting DC power P _DC to desired AC power P _AC , AC motor 4 for driving the crane main operation mechanism, and AC motor drive operation switch 5a that is closed when the motor is driven And the like. Further, in the crane for cargo handling, the AC power P _S from the AC power supply 1, the auxiliary load 6a of various applications, 6b, is also supplied to 6c · · ·. Here, the converter device 2 and the inverter device 3 are intended for a device having a regeneration function capable of returning power generated on the secondary side to the primary side.
Moreover, in an actual crane, there are various combinations and the number of converter devices, inverter devices and motors. In the configuration example of FIG. Further, only the switches related to the invention are illustrated, and the system protection switch and the like are not illustrated.

According to conventional cargo handling crane having the above configuration, the converter device 2 is output DC power P _DC with a constant voltage, the switch 5a when the operation input of the crane main operation becomes closed, the inverter device 3 by outputting AC power P _AC variable in accordance with the desired control input, the AC motor 4 is driven at a desired rotation speed. At that time, if the drive of the AC motor 4 is regenerative drive, the generated power generated by the AC motor 4 is converted to DC power P _DC via the inverter device 3, and further, the power source side AC power P is converted via the converter device 2. Converted to _S.

  On the other hand, as auxiliary machinery loads 6a, 6b, 6c, etc., there are brakes, electric motor fans, etc. that operate according to the operation during crane handling work, and aviation obstruction lights that must also operate during standby without crane handling work And heaters for preventing condensation and freezing.

  Conventionally, as a hybrid charging mobile crane, it has a wind power generator, a solar panel, a battery, an AC-DC power supply unit, etc., and can always be charged using a solar panel during lifting work, This makes it possible to perform crane lifting work without using a diesel engine, and when the vehicle is not in operation, the battery is charged with a wind power generator or a midnight power source. On the other hand, the electric motor is used due to a battery malfunction. In an impossible situation, there has been proposed one in which a lifting operation can be continued using a diesel engine (see, for example, Patent Document 1).

JP 2003-246586 A

In the conventional harbor handling crane configured as described above, the electric power generated by the regenerative drive of the AC motor 4 during the crane operation is returned to the AC power supply 1 side via the inverter device 3 and the converter device 2. Since the AC motor 4 is regeneratively driven during crane operation, it is temporary and limited, and the generated power is rarely effectively used. In addition, the port cargo handling crane performs the cargo handling work only when the ship arrives at the quay, and the crane is not always in operation, but it is stipulated by safety laws even when there is no cargo handling work. Since it is necessary to operate a heater for condensation / freezing prevention etc. to turn on the aviation obstacle light and maintain the crane function, it is necessary to always supply electric power, which increases the power cost. In addition, as a crane environment for cargo handling at harbors, it is generally installed in an open area of the harbor, so the wind is strong and there is nothing to block sunlight. Although it has been considered as a negative factor for the crane installation environment, such as a rise in the temperature of the room, their advantages as natural energy have not been utilized.
In addition, although there is a thing of patent documents 1 as a crane using natural energy, it mentions until it uses it for other equipment with the regenerated electric power, and sells it or recharges it and uses it effectively. Not done.

  The present invention has been made to solve the above-described problems, and a harbor cargo handling crane includes a power generator using natural energy, so that natural energy can be taken in as electric energy. Power storage, or using the regenerative function of the inverter or converter device to return to the power supply side, so that the use of stored power and the suppression of power purchases to operate aviation fault lights, heaters, etc. It is another object of the present invention to provide a harbor handling crane control apparatus and a harbor handling crane system that can effectively use natural energy so that excess power can be sold.

  The crane control device for harbor cargo handling according to the present invention drives a converter device that converts AC power supplied from an AC power source into DC power, an inverter device that converts DC power into desired AC power, and a crane main operation mechanism. AC motor driving operation switch that is closed when the motor is driven, AC power from the AC power supply is also supplied to the auxiliary load, and the converter device and the inverter device are generated on the secondary side DC power supply with a regenerative function that can return power to the primary side, connected to the secondary side of the converter device, for converting natural energy into electrical energy and flowing it to the DC circuit on the secondary side of the converter device Power generation device, diode for preventing backflow of DC power generated by DC power generation device, and use of power generation by natural energy during cargo handling work Preparative a DC power generator changeover switch for switching is connected to the secondary side of the converter device, in which a storage battery for storing the DC power generation by natural energy.

  Further, a crane system for harbor handling according to the present invention includes a crane equipped with a crane handling apparatus for harbor handling as described above, and an RTG that operates independently to move individual containers before and after unloading in a yard. A small crane such as RTG or RMG can be attached to a detachable storage battery charged by a crane equipped with the crane control device for harbor cargo handling provided with a power generator. The constructed and consumed storage battery is returned to the crane equipped with the power generator for recharging.

According to this invention, the power generation device using natural energy is connected to the configuration of the conventional converter device and the inverter device, and the regenerative function of the converter device and the inverter device can return the generated power to the AC power supply side. Therefore, when there is no cargo handling work, the power generated by natural energy can be used as an auxiliary load, and an economic effect can be obtained by selling surplus power.
In addition, power storage / discharge means is provided so that power can be stored and discharged as required, and can be detached, so that not only can power for auxiliary loads be controlled, but power storage devices can be connected to other equipment and cranes. By delivering and using, the entire port cargo handling system can be used effectively.

Embodiment 1 FIG.
A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram showing a harbor handling crane control apparatus according to Embodiment 1 of the present invention.
Cargo handling crane control device of the invention, as shown in FIG. 1, a converter unit 2 for converting the AC power P _S supplied from the AC power supply 1 into DC power P _DC, desired AC DC power P _DC The inverter device 3 for converting to electric power PAC, the _AC motor 4 for driving the crane main operation mechanism, the AC motor drive operation switch 5a that is closed when the motor is driven, and the like are configured. Further, in the crane for cargo handling, the AC power P _S from the AC power supply 1, the auxiliary load 6a of various applications, 6b, is also supplied to 6c · · ·. In the present invention, the converter device 2 and the inverter device 3 are intended for a device having a regeneration function capable of returning the power generated on the secondary side to the primary side. Moreover, in an actual crane, there are various combinations and the number of converter devices, inverter devices and motors. In the configuration example of FIG. Further, only the switches related to the invention are illustrated, and the system protection switch and the like are not illustrated. The configuration so far is the same as that of the conventional apparatus of FIG.
The crane control device for harbor cargo handling according to the present invention is characterized in that a direct current power generator 7 for converting natural energy into electric energy and flowing it into a secondary direct current circuit of the converter device 2, and the direct current power generator 7 Is provided with a diode 8 for preventing a reverse flow of the DC generated power, a DC power generator changeover switch 5b for switching between cargo handling work and power generation using natural energy, and further, DC power generated by natural energy. Storage batteries 9a, 9b,..., Storage battery attachment / detachment connectors 10a, 10b,..., And storage battery 9a, 9b charging and discharging timings. And a charge / discharge controller 11 capable of controlling the amount of power.

The operation of the crane control apparatus for harbor handling according to the present invention configured as described above will be described. First, the DC power generated by the DC power generator 7 is supplied to the DC circuit on the secondary side of the converter device 2 (primary side of the inverter device 3) when the changeover switch 5b is closed. Here, the change-over switch 5b can be controlled so as to be closed when there is no cargo handling operation by driving of the AC motor 4. The supplied to the DC circuit the DC generator power P _DC is regenerated through the converter device 2, regenerated power P _S can utilize accessory load 6a, 6b, to 6c. Further, surplus power can be returned to the AC power source 1 for sale.
Further, the direct-current generated power P _DC supplied to the direct-current circuit can be charged to the storage batteries 9 a and 9 b via the charge / discharge controller 11. The charge / discharge controller 11 constantly monitors the amount of power of the storage batteries 9a and 9b, and can control the input to the rechargeable batteries 9a and 9b so that the storage batteries 9a and 9b are not overcharged. Further, the charge / discharge controller 11 can control charging and discharging timing and electric energy from external information. When the DC power generated by the DC power generator 7 is small, a constant amount can be obtained by discharging. The above power can be supplied, and by controlling so as not to charge more than the power generated by natural energy, the power from the AC power source 1 can be prevented from being charged.
As described above, the direct-current generated by the direct-current power generator 7 using natural energy is stored in the storage batteries 9a, 9b, etc., charged / discharged as necessary, and returned to the AC power source 1 side. Since it can be used effectively, power purchase when there is no cargo handling work can be suppressed.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to FIG. FIG. 2 is a block diagram showing a harbor handling crane control apparatus according to Embodiment 2 of the present invention.
In the first embodiment, it is described that the DC power generated by the DC power generator 7 is used. However, in the second embodiment, as shown in FIG. There is provided a power generator 12 and an AC power generator switching switch 5c for switching between cargo handling work and use of power generated by natural energy.
In the crane control device for harbor cargo handling according to the second embodiment configured as described above, the AC power generated by the AC power generator 12 is supplied to the secondary AC load circuit of the inverter device 3 when the changeover switch 5c is closed. Is done. Here, the changeover switch 5c must be controlled to be closed when the AC motor 4 is not driven. At this time, the switch 5a is open. When the AC motor 4 is driven, the switch 5a is closed and the changeover switch 5c is opened. That is, the changeover switch 5c is always controlled to open / close reversely with the switch 5a except during maintenance or when the AC power generator 12 is not used.
Alternator power P _AC by the AC power generation device 12 is regenerated through the inverter 3, it is supplied to the DC circuit of the primary side of the inverter unit 3 (secondary side of the converter device 2). This direct-current power P _DC can be used in the same manner as in the first embodiment.
Since other operations are the same as those in the first embodiment, description thereof is omitted.

Embodiment 3 FIG.
A third embodiment of the present invention will be described below with reference to FIG. FIG. 3 is a block diagram showing a harbor handling crane control apparatus according to Embodiment 3 of the present invention.
In Embodiment 1 and Embodiment 2 described above, it is described that the generated power obtained by one type of power generation device of each of the DC power generation device 7 and the AC power generation device 12 is used, but in this Embodiment 3, As shown in FIG. 3, since both the DC power generation device 7 and the AC power generation device 12 are provided so that both power generation can be used, it is possible to introduce a power generation device using various types of natural energy, and one natural energy Then, it is possible to stably obtain the generated power which is not sufficient or not stable.
The operation of the crane control device for harbor cargo handling according to the third embodiment configured as described above is the same as the combination of those described in the first and second embodiments, and thus the description thereof is omitted.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described below with reference to FIG.
In the third embodiment, it has been described that various types of natural energy can be used as a power generation device. However, in this fourth embodiment, at least solar power generation, wind power generation, wave power generation, seawater temperature as a power generation device using natural energy. Two or more types of power generation devices using differential power generation or the like are used in combination. For example, since the solar power generation device is compatible with the DC power generation device 7, the generated power can be effectively used as in the first to third embodiments. As for the wind power generator, the case of both the DC power generator 7 and the AC power generator 12 can be considered. In any case, the generated power can be effectively used as in the first to third embodiments.
In addition, the combination of solar power generator and wind power generator complement each other's characteristics such as bad weather and low solar radiation but strong wind, good weather and high solar radiation but no wind. In addition, even with solar power generation alone, even when the amount of power generation is small and charging of the storage battery 9 is likely to be lost, the charging of the rechargeable battery 9 is supplemented by the large amount of power generated by irregular wind power generation, so it is relatively stable Power can be supplied.

Embodiment 5. FIG.
The fifth embodiment of the present invention will be described below with reference to FIG. FIG. 4 is a schematic configuration diagram illustrating a harbor cargo handling crane system according to Embodiment 5 of the present invention.
As illustrated in FIG. 5, a harbor handling crane 15 for lifting and unloading a load 14 such as a container from a ship 13 attached to a quay, a yard 16 for temporarily storing the load 14, and a load 14 within the yard 16. In a harbor cargo handling crane system consisting of cranes 17a, 17b, etc., such as RTG (Rubber Tire Gantry) and RMG (Rail Mounted Gantry), which are independently operated to transport LNG, natural energy such as solar power generation and wind power generation The sources 18a, 18b,... Are converted into electrical energy by the natural energy solar power generation device 19a, wind power generation device 19b,. The storage battery 9a is the same as the storage battery 9 in FIG. 3 and is detachable because the connectors 10a, 10b,. Therefore, the electric power of the crane 17 can be supplemented by directly mounting it on the crane 17 such as RTG or RMG as in the storage batteries 9b, 9c,. Moreover, the storage batteries 9b and 9c consumed by the crane 17 can be charged again by returning to the harbor handling crane 15 and connecting them.
As described above, the power generated by natural energy is not used only for the port cargo handling crane 15 itself, but is used for the crane 17 or the like via the storage batteries 9a, 9b, 9c. Electric power consumption can be suppressed, and the power cost can be suppressed and an economic effect can be obtained.

It is a block diagram which shows the crane control apparatus for harbor cargo handling in Embodiment 1 of this invention. It is a block diagram which shows the crane control apparatus for harbor cargo handling in Embodiment 2 of this invention. It is a block diagram which shows the crane control apparatus for harbor cargo handling in Embodiment 3 of this invention. It is a schematic block diagram which shows the crane system for harbor cargo handling in Embodiment 5 of this invention. It is a block diagram which shows the conventional crane control apparatus for harbor cargo handling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... AC power source, 2 ... Converter apparatus, 3 ... Inverter apparatus, 4 ... AC motor, 5a ... AC motor drive operation switch, 5b ... DC power generator switch, 5c ..AC generator changeover switch, 6a, 6b, 6c ... auxiliary load, 7 ... DC generator, 8 ... diode, 9a, 9b, 9c ... storage battery, 10a, 10b ... Storage battery connector, 11 ... Charge / discharge controller, 12 ... AC generator, 13 ... Ship, 14 ... Container load, 15 ... Port handling crane, 16 ... Yard , 17a, 17b ... cranes such as RTG and RMG, 18a, 18b ... examples of natural energy sources such as solar rays and wind power, 19a, 19b ... examples of power generation devices using natural energy.

Claims (6)

A converter device that converts AC power supplied from an AC power source into DC power, an inverter device that converts DC power into desired AC power, an AC motor that drives the crane main operating mechanism, and an AC that is closed when the motor is driven An AC motor drive operation switch, AC power from the AC power source is also supplied to the auxiliary load, and the converter device and inverter device have a regeneration function that can return the power generated on the secondary side to the primary side In the crane control device for harbor cargo handling,
A DC power generator connected to the secondary side of the converter device, for converting natural energy into electric energy and flowing it to the DC circuit on the secondary side of the converter device;
A diode for preventing a backflow of DC power generated by the DC power generator;
A DC power generator changeover switch for switching between cargo handling work and power generation using natural energy;
A storage battery connected to the secondary side of the converter device for storing DC power generated by natural energy;
A crane control device for cargo handling of a harbor characterized by comprising: A converter device that converts AC power supplied from an AC power source into DC power, an inverter device that converts DC power into desired AC power, an AC motor that drives the crane main operating mechanism, and an AC that is closed when the motor is driven An AC motor drive operation switch, AC power from the AC power source is also supplied to the auxiliary load, and the converter device and inverter device have a regeneration function that can return the power generated on the secondary side to the primary side In the crane control device for harbor cargo handling,
An AC power generator connected to the secondary side of the inverter device, for converting natural energy into electric energy and flowing it to an AC circuit on the secondary side of the inverter device;
An AC power generator changeover switch for switching between loading and unloading and use of power generated by natural energy;
A storage battery connected to the secondary side of the converter device for storing DC power generated by natural energy;
A crane control device for cargo handling of a harbor characterized by comprising: A converter device that converts AC power supplied from an AC power source into DC power, an inverter device that converts DC power into desired AC power, an AC motor that drives the crane main operating mechanism, and an AC that is closed when the motor is driven An AC motor drive operation switch, AC power from the AC power source is also supplied to the auxiliary load, and the converter device and inverter device have a regeneration function that can return the power generated on the secondary side to the primary side In the crane control device for harbor cargo handling,
A DC power generator connected to the secondary side of the converter device, for converting natural energy into electric energy and flowing it to the DC circuit on the secondary side of the converter device;
A diode for preventing a backflow of DC power generated by the DC power generator;
A DC power generator changeover switch for switching between cargo handling work and power generation using natural energy;
An AC power generator connected to the secondary side of the inverter device, for converting natural energy into electric energy and flowing it to an AC circuit on the secondary side of the inverter device;
An AC power generator changeover switch for switching between loading and unloading and use of power generated by natural energy;
A storage battery connected to the secondary side of the converter device for storing DC power generated by natural energy;
A crane control device for cargo handling of a harbor characterized by comprising:   The storage battery comprises a storage battery attachment / detachment connector for enabling attachment and detachment, and a charge / discharge controller capable of controlling a charge and discharge timing and electric energy of the storage battery. The crane control apparatus for harbor cargo handling as described in any one.   As a direct-current power generator and an AC power generator using natural energy, at least two types of power generators, a solar power generator and a wind power generator, are provided. 4. The port cargo handling system according to claim 3, wherein the inverter device and the converter device are diverted and regenerated to the AC power source side, and can be used for other accessories, sold, or stored in a storage battery for effective use. Crane control device. A crane equipped with the crane control device for harbor handling according to any one of claims 1 to 5, and an RTG, an RMG, and the like that operate independently to move individual containers before loading and after unloading in the yard. In the port cargo handling crane system consisting of a small group of cranes,
A small crane such as RTG or RMG is configured so that a detachable storage battery charged by the crane including the harbor cargo handling crane control device provided with the power generation device can be attached, and the consumed storage battery generates the power for recharging. A crane system for port cargo handling, wherein the crane system is returned to a crane equipped with a device.

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