JP5820226B2 - crane - Google Patents

Description

  The present invention relates to a crane.

  Dredgers and dredgers are known as machines that remove the earth and sand from the bottom of ports, rivers, and canals. Patent Document 1 describes a dredger. In this dredger, a grab bucket for grabbing earth and sand is suspended by a main wire, and the main wire is connected to a main wire winding winch. As the main wire winding winch rotates and reversely rotates, the grab bucket connected to the main wire is wound up and down. When grabbing the sand and sand on the bottom of the bay, the grab bucket is lowered and grabbed with the grab bucket, and then the grab bucket is rolled up.

  Patent Document 2 describes a hybrid power supply device that is generally used for cranes.

Japanese Utility Model Publication No. 63-100554 JP 2009-11021 A

  When a secondary battery is introduced into a grab bucket lifting / lowering device (crane) and hybridized, the secondary battery is housed in an electric room together with an inverter and a converter. If no measures are taken, the temperature of the electrical room will rise during use. If the temperature of the secondary battery rises, its life may be adversely affected.

  Such a problem may also occur in a crane other than a crane that raises and lowers the grab bucket.

  This invention is made | formed in view of such a condition, The objective is to provide the crane suitable for introduction of a secondary battery.

  One embodiment of the present invention relates to a crane. This crane has a winch having a drum wound with a wire connected to the object to be lifted and a motor that rotates the drum, and when the winch raises the object, it supplies power to the motor and the winch targets the object. When lowering, the power supply device that stores the electric power generated by the motor in the secondary battery, the first electric chamber in which the secondary battery is accommodated, and the second member in which a member different from the secondary battery of the power supply device is accommodated An electric room, a first air conditioning means for adjusting the temperature in the first electric room, a second air conditioning means for adjusting the temperature in the second electric room, a first control means for controlling the operation of the first air conditioning means, 2 a second control means for controlling the operation of the air conditioning means. The first control unit controls the temperature in the first electric chamber to be substantially constant, and the second control unit controls the temperature in the second electric chamber to be within a predetermined range.

  According to this aspect, the temperature of the secondary battery can be controlled efficiently.

  Another embodiment of the present invention is also a crane. This crane has a winch having a drum wound with a wire connected to the object to be lifted and a motor that rotates the drum, and when the winch raises the object, it supplies power to the motor and the winch targets the object. When lowering, the power supply device that stores the electric power generated by the motor in the secondary battery, the first electric chamber in which the secondary battery is accommodated, and the second member in which a member different from the secondary battery of the power supply device is accommodated An electric room, a first air conditioning means for adjusting the temperature in the first electric room, a second air conditioning means for adjusting the temperature in the second electric room, a first control means for controlling the operation of the first air conditioning means, 2 a second control means for controlling the operation of the air conditioning means. The second control means controls so that the temperature in the second electric chamber falls within a predetermined range, and the first control means controls so that the temperature in the first electric chamber falls within a range narrower than the predetermined range. To do.

  It should be noted that any combination of the above-described constituent elements and those obtained by replacing the constituent elements and expressions of the present invention with each other among apparatuses, methods, systems, etc. are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the crane suitable for introduction of a secondary battery can be provided.

It is a side view of a dredger provided with the raising / lowering apparatus which concerns on embodiment. It is a circuit block diagram which shows the function and structure of the power supply device of FIG. It is a typical floor plan of the electric room in which the power supply device of FIG. 1 was accommodated.

  Hereinafter, the same or equivalent components and members shown in the respective drawings are denoted by the same reference numerals, and repeated descriptions thereof are omitted as appropriate. In addition, the dimensions of the members in each drawing are appropriately enlarged or reduced for easy understanding. Also, in the drawings, some of the members that are not important for describing the embodiment are omitted.

  When trying to adjust the temperature of the entire electrical room containing secondary batteries, converters, inverters, etc., the entire electrical room is in line with the temperature management standards required for relatively temperature sensitive components such as secondary batteries. It is necessary to adjust the temperature. In this case, relatively strict temperature management is applied to other components in the electrical room that are relatively insensitive to temperature, and waste may occur. Therefore, when adjusting the temperature of the whole electric room, energy efficiency is comparatively bad and it cannot be said that it is energy saving. Therefore, in the lifting device (crane) according to the embodiment, an electric chamber containing a battery and another electric chamber containing at least one other member are provided, and the temperature of the electric chamber containing the battery is substantially reduced. It is kept constant so that the temperature of another electric chamber falls within a predetermined range. Thereby, the energy efficiency which concerns on the temperature management of a battery can be improved.

  In one example, the temperature of the electrical chamber in which the battery is housed needs to be kept at about 25 ° C, while the temperature in another electrical chamber in which other components are housed may be in the range of 0 ° C to 40 ° C. In summer in Japan, because the outside air temperature is high, both the electric room and another electric room are often cooled, but the set temperature of the other electric room should be set higher than the set temperature of the electric room. Can do. Thereby, energy saving can be realized while keeping the temperature of each component in an appropriate range. In winter in Japan, the outside temperature is low, so the electric room is often heated. In this case, the temperature of another electric room is lower depending on the outside air temperature.

  FIG. 1 is a side view of a dredger 10 provided with a lifting device (crane) 100 according to an embodiment. The lifting device 100 is provided on the hull 12 of the dredger 10. The lifting device 100 performs turning, lifting, opening and closing of an object to be lifted, that is, the grab bucket 14. One end of the support wire 102 and one end of the opening / closing wire 104 are connected to the grab bucket 14. The grab bucket 14 is supported in the air by the support wire 102. The grab bucket 14 is in a closed state in which the blade is closed when the open / close wire 104 is wound up.

  The lifting device 100 includes a support wire 102, an opening / closing wire 104, a swivel base 106, a turning drive unit 108, a jib 110, a hoisting wire 112, a hoisting winch 114, a supporting winch 116, and an opening / closing winch 118, It includes a relay frame 120, a jib tip sheave 122, a power supply device 124, and an engine generator 126.

The turning drive unit 108 turns the turntable 106 around a predetermined turning axis R using a turning motor (not shown).
One end of the jib 110 is attached to the swivel 106 so that it can be raised and lowered. One end of the undulation wire 112 is attached to the other end of the jib 110. A jib tip sheave 122 is rotatably attached to the other end of the jib 110. The support wire 102 and the open / close wire 104 are relayed by a jib tip sheave 122.

  The undulating winch 114, the support winch 116, and the opening / closing winch 118 are each attached to the swivel base 106. The hoisting winch 114 raises or lowers the jib 110 by winding or unwinding the hoisting wire 112. The support winch 116 raises or lowers the grab bucket 14 by winding or unwinding the support wire 102. Hereinafter, the mode of the elevating device 100 when the support winch 116 raises the grab bucket 14 is referred to as a winding mode, and the mode when it is lowered is referred to as a lowering mode.

The open / close winch 118 closes the grab bucket 14 by winding up the open / close wire 104 in the winding mode. When the winding of the opening / closing winch 118 is loosened, the grab bucket 14 is in an open state in which the blade is opened. For example, in the lowering mode, the support winch 116 is lowered and the opening / closing winch 118 is lowered, so that the grab bucket 14 is lowered while the blade is open.
The undulation wire 112, the support wire 102, and the open / close wire 104 are each relayed by the relay frame 120.

The support winch 116 and the open / close winch 118 are respectively a support wire 102, a support drum 116a around which the open / close wire 104 is wound, an open / close drum 118a, a support motor for rotating the drum, and an open / close motor (both not shown in FIG. 1). And having. The power supply device 124 supplies power during powering to the turning motor, the support motor, and the opening / closing motor, and receives regenerative power when regenerative power is generated in these motors. The power supply 124 may supply power to the undulating winch 114.
The engine generator 126 is housed in the hull 12 and supplies power to the power supply device 124.

  FIG. 2 is a circuit block diagram showing the function and configuration of the power supply device 124. The power supply device 124 supplies power to the support motor 136 and the opening / closing motor 132 in the winding mode, and stores the regenerative power generated by the support motor 136 and the opening / closing motor 132 in the secondary battery, that is, the battery 142 in the winding mode. Power supply device 124 includes a first converter 156, a second converter 154, a battery 142, a support inverter 148, an open / close inverter 144, a swing inverter 150, and a braking unit 146.

  The diode converter 127 receives AC power supplied from the engine generator 126 in the winding mode, converts it into DC power, and supplies the DC power to the first converter 156. The first converter 156 converts (boosts) the voltage of the DC power supplied from the diode converter 127 and supplies the converted voltage to the support inverter 148 and the open / close inverter 144. The first converter 156 receives direct-current power supplied from the diode converter 127 when the turning drive unit 108 starts turning of the turntable 106 and during turning, converts (boosts) the voltage, and converts the voltage to the turning inverter 150. To supply.

  The first converter 156 prevents the regenerative power generated by the support motor 136 and the opening / closing motor 132 from passing therethrough in the lowering mode. Thereby, the regenerative power generated in the lowering mode does not flow backward to the engine generator 126. Similarly, when the turning drive unit 108 stops turning of the turntable 106, the first converter 156 blocks regenerative power generated by the turning motor 138 there.

  The second converter 154 receives DC power supplied from the battery 142 in the winding mode, converts (boosts) the voltage, and supplies the converted voltage to the support inverter 148 and the open / close inverter 144. The second converter 154 receives direct-current power supplied from the battery 142 when the turning drive unit 108 starts turning of the turntable 106 and during turning, converts the voltage (boosting), and supplies it to the turning inverter 150. Supply.

  Second converter 154 receives regenerative power output from support inverter 148 and open / close inverter 144 in the lowering mode, and charges battery 142 using the received regenerative power. When the turning drive unit 108 stops turning of the turntable 106, the second converter 154 receives the regenerative power output from the turning inverter 150, and charges the battery 142 using the received regenerative power.

  The support inverter 148 and the open / close inverter 144 convert the DC power supplied from the first converter 156 and the second converter 154 into AC power and supply the AC power to the support motor 136 and the open / close motor 132 in the winding mode. Support inverter 148 and open / close inverter 144 each output regenerative power generated by support motor 136 and open / close motor 132 to second converter 154 in the lowering mode.

  The turning inverter 150 converts the direct current power supplied from the first converter 156 and the second converter 154 into alternating current power when the turning drive unit 108 starts turning of the turntable 106 and during turning. 138. The turning inverter 150 outputs the regenerative power generated by the turning motor 138 to the second converter 154 when the turning drive unit 108 stops turning of the turntable 106.

  The braking unit 146 is an auxiliary unit that is activated when the regenerative power needs to be discharged. The braking unit 146 adjusts the voltage of the regenerative power to be discharged and inputs it to the resistor 134. In this way, the regenerative power to be discharged is dissipated as Joule heat by the resistor 134.

  FIG. 3 is a schematic floor plan of the electric chamber 200 in which the power supply device 124 is housed. The electric chamber 200 is divided into a first electric chamber 204 and a second electric chamber 202. The power supply device 124 is divided and stored in a plurality of electric chambers, that is, a first electric chamber 204 and a second electric chamber 202, each of which can individually set a target temperature for air conditioning.

In the second electric chamber 202, an open / close inverter 144, a support inverter 148, a swing inverter 150, and a power supply panel 206 for operating the power supply device 124 are housed. The second electric chamber 202 includes a second air conditioner indoor unit 208, a first door 210 communicating with the outside of the electric chamber 200, and second temperature measuring means 352 such as a temperature sensor.
For example, an inverter power source, an inverter control power source, a cooling power source, and a lighting power source circuit breaker are housed in the power source panel 206.

  In the first electric chamber 204, a first converter 156, a second converter 154, and a battery 142 are housed. The first electric chamber 204 includes a first air conditioner indoor unit 212, a second door 214 communicating with the outside of the electric chamber 200, a third door 216 communicating with the second electric chamber 202, a first temperature measuring means 354, Have

When the second air conditioner indoor unit 208 is off, the temperature of the second electric chamber 202 rises mainly due to heat generated from the open / close inverter 144, the support inverter 148, and the swing inverter 150. In addition, outside air is mixed into the second electric chamber 202 by opening and closing the first door 210, and the temperature of the second electric chamber 202 rises or falls depending on the outside air temperature. When the second air conditioner indoor unit 208 is turned on, it cooperates with an outdoor unit (not shown) to suppress the rise or fall of the indoor temperature and keep the temperature of the second electric chamber 202 within a predetermined range ( For example, it can be kept at 0 to 40 ° C.
Similarly, when the first air conditioner indoor unit 212 is turned on, it cooperates with an outdoor unit (not shown) to suppress the rise or fall of the temperature of the first electric chamber 204 and to set the temperature of the first electric chamber 204 to the target. It works to approach a temperature (for example, 25 ° C.), that is, to maintain a substantially constant temperature.

  When the outside air temperature is low, outside air enters the second electric chamber 202 and the second air conditioner indoor unit 208 raises the temperature of the room when the room temperature is likely to fall below 0 ° C. (for example, the temperature rises to 10 ° C.). After the temperature rises, the room temperature is not positively adjusted, and when the room temperature is likely to fall below 0 ° C., the temperature is raised again. Further, the second air conditioner indoor unit 208 lowers the temperature (for example, 30 ° C.) when the room temperature is about to exceed 40 ° C. due to exhaust heat from the indoor electrical equipment. After the temperature is lowered, the room temperature is not actively adjusted, and when the room temperature is likely to exceed 40 ° C., the temperature is lowered again.

  The first temperature measuring unit 354 and the second temperature measuring unit 352 measure the room temperatures of the first electric chamber 204 and the second electric chamber 202, respectively, and transmit the measurement data to the control device 350. The control device 350 controls the first air conditioner indoor unit 212 and the second air conditioner indoor unit 208 as described above based on the received measurement result.

  The operation of the lifting device 100 configured as described above will be described. The lifting device 100 lowers the grab bucket 14 to the seabed by feeding the support wire 102 and the opening / closing wire 104. The lifting device 100 closes the grab bucket 14 by winding up the opening / closing wire 104. By the operation of closing the grab bucket 14, the sediment on the seabed is drowned. The elevating device 100 raises the grab bucket 14 containing the earth and sand by winding up the support wire 102 and the open / close wire 104. The elevating device 100 moves the grab bucket 14 onto an earth and sand carrier (not shown) by turning the swivel 106. The lifting device 100 opens the grab bucket 14 by loosening the opening / closing wire 104, and moves the collected earth and sand to the earth and sand carrier ship.

  According to the lifting apparatus 100 according to the present embodiment, the electric chamber 200 in which the power supply device 124 is stored is the first electric chamber 204 in which the battery 142 is stored, and the battery 142 such as the open / close inverter 144 and the support inverter 148. It divides | segments into the 2nd electric chamber 202 in which the different member was accommodated. Then, the temperature of the second electric chamber 202 is controlled within a predetermined range, and the temperature of the first electric chamber 204 is controlled to be substantially constant. Therefore, since the second electric chamber 202 only needs to be kept within a predetermined range of temperature, energy required for temperature adjustment can be reduced, and the temperature of the entire electric chamber 200 can be adjusted as compared with the case where the electric chamber is not divided. The energy required can be reduced.

  In addition, when the outdoor temperature outside the room is high, if the second door 214 of the first electric chamber 204 is frequently opened and closed, high-temperature air may flow from the outside and condensation may occur in the room. The resulting condensation can adversely affect electrical equipment. Therefore, in the lifting device 100 according to the present embodiment, the power panel 206 that is frequently used is housed in the second electric chamber 202. Accordingly, the frequency of opening and closing the second door 214 is lowered by lowering the frequency of the worker entering the first electric chamber 204, and as a result, the occurrence of condensation in the first electric chamber 204 can be suppressed.

  Further, in the lifting device 100 according to the present embodiment, the first electric chamber 204 can be moved in and out without the second electric chamber 202 due to the presence of the second door 214. Although it takes time to enter the first electric chamber 204 from the second electric chamber 202 via the third door 216, this makes it easier to enter and exit the first electric chamber 204.

  It is also possible to delete the second door 214 and allow the first electric chamber 204 to enter and exit only through the second electric chamber 202. In this case, since most of the air flowing into the first electric chamber 204 is the air of the second electric chamber 202, the outdoor temperature outside the room is particularly high, and a large amount of high-temperature air can flow from the outside. In comparison, the occurrence of condensation in the first electric chamber 204 can be suppressed. Moreover, since it can suppress that the cool air in the 1st electric chamber 204 escapes directly outside, cooling efficiency increases.

  Further, from the viewpoint of the cooling efficiency of the battery 142, the battery 142, the first converter 156, and the second converter 154 may be stored separately in separate electric chambers. In this case, the cooling efficiency of the battery 142 is improved as compared with the embodiment.

  In the above, the raising / lowering apparatus which concerns on embodiment, and the dredger in which it was mounted were demonstrated. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements, and such modifications are also within the scope of the present invention.

  Although the case where the engine generator 126 is used has been described in the embodiment, the present invention is not limited to this, and an arbitrary generator may be used.

  In the embodiment, the case where each motor is an AC drive motor has been described. However, the present invention is not limited to this, and other drive types, for example, a DC drive motor may be used.

  In the embodiment, the lifting device mounted on the dredger has been described. However, the present invention is not limited to this, and the technical idea according to the embodiment can be applied to general cranes including jib cranes, dredgers, pile driving machines, and the like. In addition to the lifting device mounted on a ship, the present invention can also be applied to a lifting device installed on land.

  In the embodiment, the case where the first air conditioner indoor unit 212 adjusts the temperature in the first electric chamber 204 to be substantially constant has been described, but the present invention is not limited thereto. For example, the first air conditioner indoor unit may be controlled to keep the temperature in the first electric room within a certain range. In this case, the temperature range of the first electric chamber may be narrower than the temperature range of the second electric chamber. For example, the first air conditioner indoor unit may control the temperature in the first electrical room to be within a range of 24 ° C to 26 ° C.

  In the embodiment, the case where one control device 350 controls the first air conditioner indoor unit 212 and the second air conditioner indoor unit 208 has been described. However, the present invention is not limited to this. It may be divided into two air conditioner indoor units. In the embodiment, the case where the control device 350 is provided outside the electric chamber 200 has been described. However, the present invention is not limited to this, and the control device may be provided in the electric chamber.

  10 dredger, 12 hull, 14 grab bucket, 100 lifting device, 110 jib, 124 power supply.

Claims (5)

A winch having a drum wound with a wire connected to an object to be lifted, and a motor for rotating the drum;
When the winch raises the object, power is supplied to the motor, and when the winch lowers the object, a power supply device that stores electric power generated by the motor in a secondary battery;
A first electric chamber containing the secondary battery;
A second electric chamber in which a member different from the secondary battery of the power supply device and a power supply panel for operating the power supply device are housed;
First air conditioning means for adjusting the temperature in the first electrical chamber;
Second air conditioning means for adjusting the temperature in the second electric chamber;
First control means for controlling the operation of the first air conditioning means;
Second control means for controlling the operation of the second air conditioning means,
The first control means controls the temperature in the first electric chamber to be substantially constant;
The crane according to claim 2, wherein the second control means controls the temperature in the second electric chamber to be within a predetermined range. 2. The crane according to claim 1, wherein the first electric chamber is configured to be accessible without going through the second electric chamber. The crane according to claim 1, wherein the first electric chamber is configured to be accessible only through the second electric chamber. The power supply device includes a converter that controls charging of the secondary battery and supply of electric power from the secondary battery to the motor,
The crane according to any one of claims 1 to 3 , wherein the converter is housed in the second electric chamber. A winch having a drum wound with a wire connected to an object to be lifted, and a motor for rotating the drum;
When the winch raises the object, power is supplied to the motor, and when the winch lowers the object, a power supply device that stores electric power generated by the motor in a secondary battery;
A first electric chamber containing the secondary battery;
A second electric chamber in which a member different from the secondary battery of the power supply device and a power supply panel for operating the power supply device are housed;
First air conditioning means for adjusting the temperature in the first electrical chamber;
Second air conditioning means for adjusting the temperature in the second electric chamber;
First control means for controlling the operation of the first air conditioning means;
Second control means for controlling the operation of the second air conditioning means,
The second control means controls the temperature in the second electric chamber to be within a predetermined range;
The crane is characterized in that the first control means controls the temperature in the first electric chamber to be within a range narrower than the predetermined range.

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