KR100926593B1 - Crane - Google Patents

Abstract

Provided is a crane that can facilitate replacement or renewal of a power semiconductor element or the like. By controlling the crane main body and the electric power to be supplied to the motor, a motor control unit for controlling the output of the motor and an electric chamber in which the motor control unit is disposed are provided, and the electric chamber is detachably arranged in the crane main body. It is done.

Description

Crane {CRANE}

1 is a plan view for explaining the configuration of a ladle crane according to an embodiment of the present invention,

2 is a side view illustrating the configuration of the main girder and the main trolley of FIG. 1;

3 is a schematic view for explaining the configuration of the ladle crane of FIG.

4 is a block diagram illustrating a configuration of an electric circuit in the travel motor of FIG. 3;

5 is a cross-sectional view illustrating the configuration of the main trolley, the auxiliary trolley and the electric chamber of FIG. 1;

6 is a block diagram illustrating the configuration of an electric circuit in the main winding device and the auxiliary winding device of FIG. 1;

7 is a block diagram illustrating the configuration of an electric circuit in the main transverse traveling motor and the auxiliary transverse traveling motor of FIG. 1;

8 is a partial side view illustrating the configuration of the auxiliary trolley of FIG. 1;

9 is a partial side view illustrating a state in which the electric chamber of FIG. 2 is separated from the main girder;

Explanation of symbols for the main parts of the drawings

1: crane (ladle crane) 3: end tie

5: main girder (crane body) 7: auxiliary girder

9: main trolley (trolley) 11: auxiliary trolley

15: running purlin 17: running rail

19: traveling device

21A, 21B, 21C, 21D, 21E, 21F, 21G, 21H: Travel Motor

23A, 23C, 23E, 23G: Drive Inverter Device

27: main transverse rail 29: electric room

31: support portion 33: coupling portion
35: engagement

37: heat shield 59A, 59B, 59C, 59D: main winding inverter device

The present invention relates to a crane, in particular a ladle crane used for carrying ladles.

Background Art Conventionally, molten steel is accommodated in ladles in a steelmaking facility or a steelmaking facility, and each ladle is transported by a ladle crane. For example, molten steel is accommodated in a ladle from an electric furnace or the like, transported to a converter or the like by a ladle crane, and is then poured into a converter or the like.

The ladle crane carries the ladle up by the main winding device and injects molten steel from the ladle to the converter by lifting the lower part of the ladle with the auxiliary winding device (for example, Japanese Patent Laid-Open No. 11-268881). See publication number).

In the conventional ladle crane, the motor control part which controls the motor which drives a main winding apparatus etc. was arrange | positioned in the space in the girder of a ladle crane.

The motor control unit controls the current or voltage supplied to the motor, and includes various elements such as a power semiconductor element for controlling the current and the like.

In general, the life of these devices is short compared to the life of the ladle crane body, and the period of version up of the devices is also short compared to the life of the ladle crane body.

In order to replace a defective element due to such a shortened life, the element itself was replaced or replaced for each motor control unit. When the production of the device is finished due to the upgrade, it is necessary to update the control circuit such as the current to the control circuit corresponding to the new device after the upgrade.

However, since the motor control unit is arranged in a narrow space in the girder, there is a problem that a lot of hands are required to replace the element itself. In particular, when the life of an element is shortened and a failure occurs, since a plurality of elements continuously fail during a relatively short period of time, there is a problem in that the replacement of the element itself takes a lot of trouble. When replacing a motor control part, since it replaces the motor control part arrange | positioned in the girder, there was a problem that exchange | exchange was difficult since it was very difficult to replace and since the motor control part needed to be carried in and out of a girder.

This invention is made | formed in order to solve the said subject, and an object of this invention is to provide the crane which can facilitate replacement, update, etc. of a power semiconductor element.

In order to achieve the above object, the present invention provides the following means.

The present invention provides a crane body, a motor used for adjusting the position of a winding device provided on the crane body for winding up and down the hanging load, and for winding up and winding down the hanging load by the winding device, and supplying the motor. The motor control part which controls the output of the said motor by controlling the electric power to be provided, and the electric chamber in which the said motor control part are arrange | positioned are provided, and the said electric chamber is provided in the crane main body detachably arrange | positioned.

According to the present invention, since the motor control unit is concentrated in the electric chamber arranged in the crane main body, it is possible to easily exchange or update the elements used for power control such as power semiconductor elements used in the motor control unit. have. Since the electric chamber is provided separately from the crane main body, the space in the electric chamber can be provided wider than when the motor control unit is provided in the space within the crane main body. Therefore, the operation | work etc. of the said element replacement | exchange in an electric room, etc. can be performed easily. Since entry into and out of the electrical chamber is facilitated, operations such as replacement and update of the device can be easily performed.

Since the electric chamber is detachably arranged in the crane main body, the motor control part itself can be replaced in the state which removed the electric chamber from the crane main body. Since the electric chamber separated from the crane main body can be moved to a place more suitable for replacing the motor control unit, the motor control unit can be easily replaced. As a place more suitable for the replacement of the motor control unit, a place lower than the high place where the crane main body is arranged, and a place having less dust or the like can be exemplified.

In particular, in the case where the motor is an inverter controlled motor, and the motor control unit is an inverter device, since the interval at which the inverter device is upgraded is shorter than the service life of the crane, it is preferable that the motor control unit can be easily replaced in accordance with the upgrade. Do.

Since the crane of the present invention can be easily replaced with the above-described elements of the motor control unit or the motor control unit itself, the crane is preferably used when the inverter device including an element which is frequently upgraded is used as the motor control unit.

Alternatively, an electric chamber separate from the electric chamber to be separated from the crane main body is prepared, and the electric chambers can be exchanged to shorten the time required for the replacement of the motor control unit and the replacement or update of the elements. The element and the motor control unit which need replacement or the like can exchange the electric chamber after a sufficient time after removing the electric chamber from the crane body.

By intensively arranging the motor control unit in the electric chamber and placing the electric chamber in the crane main body, the number of mounting parts of the motor control unit can be reduced as compared with the case where the motor control unit is directly arranged in the crane main body. Since the electric chamber arrange | positions a motor control part inside, an inside can be made into the structure suitable for installation of a motor control part. Therefore, compared with the case where it arrange | positions directly in a crane main body, the number of installation parts used for installing a motor control part can be reduced.

By collectively carrying out the wiring from the electric chamber to the crane main body, the time for the wiring work can be reduced as compared with the case of performing the wiring for each motor control unit. Since the electric chamber arrange | positions a motor control part inside, the wiring from a motor control part to the exterior of an electric room can be previously created in an electric room. Therefore, the time of wiring work in the replacement | exchange of the said element of a motor control part, or the replacement of the motor control part itself can be easily reduced. By tying the wiring between the electrical chamber and the crane body with a bundle of integrated wirings, the time for wiring work when the electrical chamber is attached to or detached from the crane body can be reduced.

In the above invention, the crane body is provided with a girder moving along the traveling purlin, a trolley moving along the girder, and a winding device provided on the trolley to wind up and wind up the load, and the motor is provided. It is used for the movement of a girder, the movement of the said trolley, and the winding-up and winding-down of the said load by the said winding device, It is preferable that the said electric chamber is arrange | positioned detachably to the said girder.

By doing so, since the electric chamber equipped with the motor control part used in at least one of the movement of a girder, a trolley, and the reeling of a load is arrange | positioned detachably to a girder, the said motor which is used for the replacement of a motor control part or a motor control part The replacement of the device can be performed easily. Since it is easy to carry in and out an electric chamber from the exterior with respect to a girder, attachment and detachment of an electric chamber can be made easy by arrange | positioning an electric chamber to a girder.

Since the motor is used for at least one of the movement of the girder and the trolley, the winding of the load, and the like, a power semiconductor element or the like can be used for the motor control unit for controlling the motor. Since the power semiconductor element and the like are regularly upgraded, it is preferable that the motor controller can be easily replaced in accordance with the upgrade.

The crane of the present invention is easy to replace the device of the motor control unit or the motor control unit itself, and therefore, it is preferable to use the inverter device including an element which is frequently upgraded as a motor control unit.

In the said invention, the structure in which the said electric chamber is provided with the engaging part engaged with the crane which hangs the said electric chamber is preferable.

By doing in this way, since the engaging part is provided in an electric chamber, an electric chamber can be suspended by another crane, and an electric chamber can be easily installed and removed in a crane main body.

In particular, in the case of a large crane such as a ladle crane, the capacity required for the motor controller increases, and the weight of the motor controller becomes heavy. Since the weight of the electric chamber provided with a plurality of such motor control apparatuses becomes heavy, when attaching and detaching an electric chamber to a crane main body, it is necessary to use the crane which hangs an electric chamber. By providing the engaging portion in the electrical chamber, the electrical chamber can be easily suspended using a crane, and thus the electrical chamber can be easily attached and detached.

In the said structure, it is preferable that the said girder is provided with the support part which supports the said electric chamber to protrude outside, and the said electric chamber is provided with the engaging part fixed so that engagement with the said support part is possible.

By doing in this way, an electric chamber can be attached to the support part of a girder through a coupling part, and an electric chamber can be easily attached or detached to a support part.

Since the support portion is provided by protruding outward from the girder, when the electric chamber is attached to or detached from the support portion, the electric chamber, the girder, and the like are less likely to interfere, and the attachment and detachment work of the electric chamber becomes easy. The electrical chamber can be separated by detaching the engaging portion from the supporting portion, and the electrical chamber can be attached to the electrical chamber by engaging the engaging portion in the supporting portion, thereby facilitating attaching and detaching operation of the electrical chamber.

In the said invention, it is preferable that the said heat shield is provided with the heat shield which prevents invasion of heat from the exterior.

In this way, since the heat shield is provided, heat can be prevented from entering the electrical chamber from the outside, and failure of the motor control unit due to heat can be prevented.

For example, in the case where the ladle (furnace) into which molten steel is put is a load, it is preferable that the heat shield is arranged on the lower surface of the electrical chamber. By arranging the heat shields in this way, the radiant heat from the molten steel can be prevented from entering the electrical chamber.

In the above invention, a plurality of first motor control units provided in the electric chamber for controlling the output of the first motor by controlling a power supplied to the first motor and the first motor, a second motor, By controlling the power supplied to the second motor, a second motor control unit provided in the electric chamber for controlling the output of the second motor is provided, and the second motor is supplied with power and stopped from the first motor control unit. It is preferable to be controllable.

In the above invention, a plurality of first motor control units provided in the electric chamber for controlling the output of the first motor by controlling a power supplied to the first motor and the first motor, a second motor, By controlling the electric power supplied to the said 2nd motor, it is provided with the 2nd motor control part provided in the said electric chamber which controls the output of the said 2nd motor, The said 2nd motor is supplied with electric power and stopped from a 1st motor control part. Is controllable, the said 1st motor control part is any one of the some control part which respectively controls the output of the some winding motors of a main trolley, The said 2nd motor control part is a winding motor of an auxiliary trolley. It is preferable that it is a motor control part of.

By doing so, since the second motor is operated by the first motor control unit, even if the second motor control unit has failed, for example, by lifting the hook by the second motor and moving the girder to a safe position, the electrical chamber is separated. You can do

In particular, even when molten steel is in the ladle, the electrical chamber can be separated after the molten steel in the ladle is transferred to the converter. Therefore, the time required for separation of the electrical chamber can be omitted, and the parts arranged in the electrical chamber can be repaired quickly and safely.

According to the crane of the present invention, since the motor control unit is concentrated in the electric chamber arranged in the crane main body and the electric chamber is detachably arranged in the crane main body, the motor control unit is removed from the crane main body. It can exchange itself, and it is easy to replace, update, etc. of a power semiconductor element.

The ladle crane which concerns on one Embodiment of this invention is demonstrated with reference to FIGS.

FIG. 1 is a plan view illustrating the structure of a ladle crane according to the present embodiment. FIG.

As shown in FIG. 1, the ladle crane (crane) 1 includes an end tie 3, a main girder (crane body) 5, an auxiliary girder 7, and a main trolley ( trolly 9 and auxiliary trolley 11 are provided.

FIG. 2 is a side view illustrating the configuration of the main girder and the main trolley of FIG. 1. FIG.

As shown in FIG. 2, the end tie 3 is a pair of members extending along the travel rail 17 provided in the travel purlin 15, and traveling on the travel rail 17. The apparatus 19 is provided. As shown in FIG. 1, the end tie 3 is provided with a main girder 5 and an auxiliary girder 7.

FIG. 3 is a schematic diagram illustrating a configuration of the ladle crane of FIG. 1.

The traveling device 19 is arranged between the traveling rail 17 and the end tie 3 to drive the ladle crane 1 along the traveling rail 17. In this embodiment, four traveling apparatuses 19 are applied to embodiment provided in the both ends of the end tie 3, and it demonstrates.

As shown in FIG. 3, each traveling device 19 includes traveling motors 21A, 21B, traveling motors 21C, 21D, and traveling that drive the ladle crane 1 along the traveling rails 17. The motors 21E and 21F and the traveling motors 21G and 21H are provided, respectively.

In addition, as the traveling motors 21A, 21B, 21C, 21D, 21E, 21F, 21G, 21H, a known motor controlled by an inverter can be used, and the motor is not particularly limited.

4 is a block diagram illustrating the configuration of an electric circuit in the travel motor of FIG. 3.

As shown in Fig. 4, power is supplied to the traveling motors 21A and 21B from the traveling inverter device (inverter device) 23A. Similarly, electric power is supplied to the traveling motors 21C and 21D from the driving inverter device (inverter device) 23C, and electric power is supplied to the traveling motors 21E and 21F from the driving inverter device (inverter device) 23E. The driving motors 21G and 21H are supplied with electric power from the driving inverter device (inverter device) 23G. These power inverter devices 23A, 23C, 23E, and 23G are supplied with AC power from the outside.

In addition, the drive inverter devices 23A, 23C, 23E, and 23G for driving the drive motors 21A, 21B, 21C, 21D, 21E, 21F, 21G, and 21H by performing variable voltage variable frequency control on the supply power. Control may be performed, and constant voltage constant frequency control, variable voltage constant frequency control, and constant voltage variable frequency control may be performed, and are not specifically limited.

The main girder 5 is a pair of girder-shaped members arranged to connect the pair of end ties 3 to mount the main trolley 9 movable thereon. The main girder 5 is arranged to be substantially orthogonal to the end tie 3, and is disposed outside the auxiliary girder 7 described later.

On the upper surface of the main girder 5 (the front face to the ground in FIG. 1), a main transverse running rail 27 extending along the main girder 5 is disposed, and the side surface of the main girder 5. On the lower surface in FIG. 1, an electric chamber 29 in which the main winding inverter device 59A and the like described later are housed is provided.

The main transverse running rail 27 is mounted on the main trolley 9 and guided along a direction substantially perpendicular to the travel rail 17 (hereinafter referred to as a transverse running direction).

5 is a cross-sectional view illustrating the configuration of the main trolley, the auxiliary trolley and the electric chamber of FIG. 1.

As shown in FIG. 5, the electric chamber 29 is a box-shaped member disposed at a position opposite to the side surface (surface on the left side in FIG. 5) of the main girder 5. On the upper surface (upper surface of FIG. 5) of the electric chamber 29, a coupling portion 33 fixed to the support portion 31 extending from the main girder 5 is provided, and as shown in FIG. 2, a crane The engaging part 35 which engages with the hook (not shown) of is provided. The lower surface (lower surface in FIG. 5) of the electrical chamber 29 is provided with a heat shield 37 covering the lower surface. The heat shield 37 is also provided on the lower surface of the main girder 5. The electrical chamber 29 is attached to or detached from the support part 31 by engaging or detaching the support part 31 and the coupling part 33.

Inside the electric chamber 29, the main winding inverter apparatus 59A, 59B, 59C, 59D, the auxiliary winding inverter apparatus 87 (refer FIG. 6), the main lateral traveling inverter apparatus 67A, 67B, The auxiliary transverse traveling inverter device 95 (see FIG. 7) and the traveling inverter devices 23A, 23C, 23E, and 23G (see FIG. 4) are disposed. The main winding inverter devices 59A, 59B, 59C, 59D and the like are electrically connected to the main winding motor 47A and the like described later when the electrical chamber 29 is attached to the support part 31.

Moreover, it is preferable that the electrical chamber 29 is a member about the same size as a marine container, for example, about 40 feet container. This is because such a size makes it possible to use a ship, a trailer, or the like for carrying the electric chamber 29, and to easily transport the electric chamber 29 from a manufacturing plant to a steel mill where the ladle crane 1 is installed.

Here, the 40-foot container is a container having a length of 12.192 m, a width of 2.438 m, and a height of 2.590 m.

In the electric chamber 29 having a size of about 40 feet container, when the main winding inverter devices 59A, 59B, 59C, and 59D cannot be stored in the electric chamber 29, two 40 container boxes are connected to the electric chamber. (29) may be used. In such a case, it is preferable that the box is transported from the manufacturing plant to an outdoor area near a steel mill or the like, the box is connected to the electrical room 29 in the outdoor area, and then brought into the indoor room of the steel mill or the like. This is to prevent dust present in a large amount in the steelworks and the like from entering the electrical chamber 29 when the box is connected.

As shown in FIG. 1, the auxiliary girder 7 is a pair of girder-shaped members arranged to connect a pair of end ties 3 like the main girder 5, and the auxiliary trolley 11 is placed thereon. It is to be movable. The auxiliary girder 7 is arranged to be substantially orthogonal to the end tie 3, and is disposed inside the main girder 5.

The auxiliary girder 7 is provided with an auxiliary transverse running rail 39. The auxiliary transverse running rail 39 is mounted on the auxiliary trolley 11 to guide along the transverse running direction.

As shown in Fig. 2, the main trolley 9 includes a main winding device (winding device) 43 which winds up and winds up the ladle (hanging load) 41 (see Fig. 5) and the main trolley 9. Main transverse traveling motors (motors, first motors) 45A and 45B for horizontally traveling the vehicle are provided.

The main winding device 43 includes main winding motors (motors, first motors) 47A, 47B, 47C, 47D, main winding reduction units 49A, 49B, 49C, and main winding drums 51A, 51B. And, as shown in FIG. 5, the hanging main sheave 53, the hanging beam 55, and the main hook 57 are provided.

As shown in FIG. 2, the main winding motors 47A and 47B and the main winding motors 47C and 47D are disposed separately from one end portion and the other end portion of the main trolley 9. The rotational driving force of the main winding motors 47A, 47B, 47C, 47D is transmitted to the main winding drums 51A, 51B via the main winding reduction units 49A, 49B, 49C.

As the main winding motors 47A, 47B, 47C, 47D, a motor having an output capable of winding up and winding down the ladle 41 and the main hook 57 in which molten steel has been entered by any of the three main winding motors is provided. Has been selected.

As the main winding motors 47A, 47B, 47C, and 47D, a known motor controlled by an inverter can be used, and the present invention is not particularly limited.

FIG. 6 is a block diagram illustrating the configuration of an electric circuit in the main winding device and the auxiliary winding device of FIG. 1.

As shown in FIG. 6, AC power is supplied to the main winding motors 47A, 47B, 47C, and 47D from the main winding inverter devices (motor control unit, first motor control unit) 59A, 59B, 59C, 59D, respectively. It is becoming. AC power is supplied from the outside to these main winding inverter apparatus 59A, 59B, 59C, 59D.

An auxiliary winding switch 61 is connected between the main winding inverter device 59D and the main winding motor 47D to supply and cut off AC power from the main winding inverter device 59D to the auxiliary winding motor 75. have.

The capacities of the main winding inverter devices 59A, 59B, 59C, and 59D are set larger than those of the auxiliary winding inverter device 87 described later. The capacity of the main winding inverter devices 59A, 59B, 59C, 59D and the auxiliary winding inverter device 87 can be exemplified by 500 kW and 200 kW, respectively, but is not limited to this example.

In addition, the main winding inverter devices 59A, 59B, 59C, and 59D may control the main winding motors 47A, 47B, 47C, and 47D by performing variable voltage variable frequency control with respect to the supply power, and thus the constant voltage constant frequency. Control, variable voltage constant frequency control, constant voltage variable frequency control, and the like may be used, and the present invention is not particularly limited.

The main winding reduction unit 49A is disposed between the main winding motors 47A and 47B, and as shown in Fig. 1, the rotational driving force of the main winding motors 47A and 47B is summarized into one rotational driving force. It is arrange | positioned so that it may transmit to the winding reduction part 49C. The main winding reduction unit 49B is disposed between the main winding motors 47C and 47D, and arranges the rotational driving force of the main winding motors 47C and 47D into one rotational driving force and transfers it to the main winding reduction unit 49C. It is arranged to.

The main winding deceleration part 49C is arrange | positioned so that the rotational drive force input from 49 A of main winding reduction parts, and main winding reduction part 49B may be transmitted to main winding drums 51A, 51B.

Moreover, as the main winding reduction parts 49A, 49B, and 49C, the speed reducer which transmits a well-known rotation drive force can be used, It does not specifically limit. For example, like this embodiment, three reduction parts may be combined and the rotation drive force of the main winding motors 47A, 47B, 47C, 47D may be transmitted to the main winding drums 51A, 51B by one reduction unit. It does not limit in particular.

The main winding drums 51A and 51B are cylindrical or cylindrical members, are rotatably arranged around the central axis, and are arranged substantially parallel to the transverse running direction.

A main wire 63 is wound around the main winding drums 51A and 51B to wind up and wind up the main hook 57. The main wire 63 is unwound by the main winding drums 51A and 51B being driven to rotate in one rotation direction, and the main wire 63 is wound by being driven to rotate in another rotation direction. Moreover, unwinding and winding of the main wire 63 in the main winding drums 51A and 51B are performed simultaneously.

The main wire 63 extends from the main winding drums 51A and 51B toward the hook side main sheave 54, wound around the hook side main sheave 54 and the hanging main sheave 53, and the main wire 63. The end of is fixed to the hanging beam 55.

The hanging main sheave 53 is a cylindrical or cylindrical member disposed on the lower surface of the main trolley 9 and is rotatably arranged around the central axis, and the central axis is substantially parallel to the transverse running direction. It is arranged to.

The hook-side main sheave 54 is a cylindrical or cylindrical member disposed on the hanging beam 55, and is rotatably disposed around the central axis, and the central axis is substantially parallel to the transverse direction. have.

As shown in FIG. 5, the main hooks 57 are hooks that are coupled to the shaft 41a of the ladle 41 and are provided at each end of the hanging beam 55. As shown in FIG. 2, the main hook 57 is attached to the hanging beam 55 using the pin 65, and can be rotated using the central axis of the pin 65 as the rotation center.

As shown in FIG. 3, the main transverse traveling motor 45A is disposed at one end of the main trolley 9, and the main transverse traveling motor 45B is disposed at the other end. The rotational driving force generated by the main transverse traveling motors 45A and 45B is transmitted to the main transverse traveling portion 9A of the main trolley 9, as shown in FIG.

In addition, as the main transverse traveling motors 45A and 45B, a known motor controlled by an inverter can be used, and the motor is not particularly limited.

FIG. 7 is a block diagram illustrating the configuration of an electric circuit in the main transverse traveling motor and the auxiliary transverse traveling motor of FIG. 1.

As shown in FIG. 7, electric power is supplied to the main transverse traveling motors 45A and 45B from the main transverse traveling inverter devices (motor control unit and first motor control unit) 67A and 67B, respectively. AC power is supplied to the main transverse traveling inverter devices 67A and 67B from the outside.

Between the main transverse traveling inverter device 67B and the main transverse traveling motor 45B, the auxiliary transverse which supplies and cuts AC power from the main transverse traveling inverter device 67B to the auxiliary transverse traveling motor 73. The direction traveling switch 69 is connected.

The capacities of the main lateral traveling inverter devices 67A and 67B are set larger than those of the auxiliary lateral traveling inverter device 95 described later. Although the capacity | capacitance of 45 kW and 15 kW can be illustrated as a capacity | capacitance of the main transverse traveling inverter apparatus 67A, 67B, and the auxiliary transverse traveling inverter apparatus 95, respectively, it is not limited to this example.

Further, the main transverse traveling inverter devices 67A and 67B may control the main transverse traveling motors 45A and 45B by performing variable voltage variable frequency control as a control of the supply power, Variable voltage constant frequency control, constant voltage variable frequency control, and the like may be used, but the present invention is not particularly limited.

As shown in FIG. 1, the auxiliary trolley 11 transversely runs the auxiliary winding device (winding device) 71 which controls the inclination of the ladle 41 (refer FIG. 5), and the auxiliary trolley 11 in a lateral direction. An auxiliary transverse traveling motor (motor, second motor) 73 is provided.

The auxiliary winding device 71 includes an auxiliary winding motor (motor, second motor) 75, an auxiliary winding reduction unit 77, an auxiliary winding drum 79, a trolley side auxiliary sheave 81, and a hook. The side auxiliary sheave 83 and the auxiliary hook 85 are provided.

As shown in FIG. 1, the auxiliary winding motor 75 is provided at one end of the auxiliary trolley 11. The rotational driving force of the auxiliary winding motor 75 is transmitted to the auxiliary winding drum 79 via the auxiliary winding reduction unit 77. In addition, as the auxiliary winding motor 75, a known motor controlled by an inverter can be used, and is not particularly limited.

As shown in FIG. 6, electric power is supplied to the auxiliary winding motor 75 from an auxiliary winding inverter device (motor control unit, second motor control unit) 87. AC power is supplied from the outside to the auxiliary winding inverter device 87.

In addition, the auxiliary winding inverter device 87 may control the auxiliary winding motor 75 by performing variable voltage variable frequency control with respect to the supply power, and may perform constant voltage constant frequency control, variable voltage constant frequency control, or constant voltage variable. Frequency control may be performed, and the present invention is not particularly limited.

The auxiliary winding reduction unit 77 is arranged to transmit the rotational driving force of the auxiliary winding motor 75 to the auxiliary winding drum 79.

In addition, as the auxiliary winding reduction unit 77, a reduction gear that transmits a known rotational driving force can be used, and is not particularly limited.

The auxiliary winding drum 79 is a cylindrical or cylindrical member, is rotatably arranged around the central axis, and is substantially perpendicular to the transverse running direction.

An auxiliary wire 89 is wound around the auxiliary winding drum 79 to wind the auxiliary hook 85 up and down. The auxiliary wire 89 is loosened by the auxiliary winding drum 79 being rotated in one rotation direction, and the auxiliary wire 89 is wound by being rotated in the other rotation direction.

FIG. 8 is a partial side view illustrating the configuration of the auxiliary trolley of FIG. 1. FIG.

The auxiliary wire 89 extends from the auxiliary winding drum 79 toward the hook side auxiliary sheave 83, wound around the hook side auxiliary sheave 83 and the trolley side auxiliary sheave 81, and ends of the auxiliary wire 89. Is fixed to the auxiliary trolley 11.

The trolley-side auxiliary sheave 81 is a cylindrical or cylindrical member disposed between the auxiliary winding motor 75 and the auxiliary winding drum 79 in the auxiliary trolley 11, and is rotatable about a central axis. At the same time, the center axis is disposed substantially perpendicular to the transverse running direction.

The hook-side auxiliary sheave 83 is a cylindrical or cylindrical member disposed on the auxiliary hook block 91 of the auxiliary hook 85 and is rotatably disposed around the central axis, and the central axis is transversely traveling. It is arranged substantially perpendicular to the direction.

As shown in FIG. 5, the auxiliary hook 85 is a hook provided in the auxiliary hook block 91, and is a hook which is caught by the inclined hardware 41b provided in the side wall of the ladle 41. As shown in FIG.

The auxiliary lateral traveling motor 73 is disposed at the other end of the auxiliary trolley 11 as shown in FIG. 3. The rotational driving force generated by the auxiliary lateral traveling motor 73 is transmitted to the auxiliary lateral traveling part 93 of the auxiliary trolley 11 as shown in FIG. 8. In addition, as the auxiliary lateral traveling motor 73, a known motor controlled by an inverter can be used, and is not particularly limited.

As shown in FIG. 7, electric power is supplied to the auxiliary lateral traveling motor 73 from the auxiliary lateral traveling inverter device (motor control unit, second motor control unit) 95. AC power is supplied from the outside to the auxiliary transverse traveling inverter device 95.

In addition, the auxiliary transverse traveling inverter device 95 may control the auxiliary transverse traveling motor 73 by performing variable voltage variable frequency control as a control of the supply power, and may perform constant voltage constant frequency control or variable voltage constant frequency. Control, constant voltage variable frequency control, and the like may be used, but are not particularly limited.

Next, the method of conveying the ladle 41 in the ladle crane 1 which consists of said structure is demonstrated.

First, in the case of carrying the ladle 41, as shown in Fig. 2, the ladle crane 1 is moved along the running rail 17, and the main trolley 9 is moved in the lateral direction, so that the main hook 57 ) Is moved above the ladle 41.

When the main trolley 9 moves to the upper side of the ladle 41, as shown in Fig. 5, the main hook 57 is released to hang the main hook 57 on the shaft 41a of the ladle 41, The ladle 41 is wound up by the main winding device 43.

When winding up the main hook 57, as shown in FIG. 6, the main winding motors 47A, 47B, 47C, 47D of the main winding device 43 from the main winding inverter apparatus 59A, 59B, 59C, 59D. ) Is supplied with AC power, and rotational driving force is generated from the main winding motors 47A, 47B, 47C, 47D. As shown in FIG. 3, the rotational driving force is transmitted to the main winding drums 51A and 51B via the main winding reduction units 49A and 49B and the main winding reduction unit 49C. The main winding drums 51A and 51B are rotationally driven by the transmitted rotational driving force.

By the rotation of the main winding drums 51A and 51B, the main wire 63 is wound around the main winding drums 51A and 51B so that the main hook 57 on which the ladle 41 is wound can be wound upward. .

At this time, the auxiliary winding switch 61 is cut off, and all the AC power supplied from the main winding inverter device 59D is supplied to the main winding motor 47D.

The main winding motors 47A, 47B, 47C, 47D are operated at the same output, and the main winding inverter devices 59A, 59B, 59C, 59D and the main winding motors 47A, 47B, 47C, 47D have left room Is being driven.

When the ladle 41 is suspended, the ladle crane 1 travels along the travel rail 17 and the main trolley 9 runs in the lateral direction, for example, to be transported in the vicinity of a converter or the like.

When the ladle crane 1 travels, as shown in Fig. 4, from the drive inverter devices 23A, 23C, 23E to the traveling motors 21A, 21B, 21C, 21D, 21E, 21F, 21G, 21H. AC power is supplied to generate rotational driving force from the traveling motors 21A, 21B, 21C, 21D, 21E, 21F, 21G, 21H. The rotational driving force is transmitted to the traveling device 19, and the ladle crane 1 travels along the traveling rail 17 until the ladle 41 approaches the converter or the like.

At this time, the driving inverter devices 23A, 23C, and 23E generate the same rotational driving force from the traveling motors 21A, 21B, 21C, 21D, 21E, 21F, 21G, and 21H by controlling the AC power to be supplied. I'm making it.

If any of the travel motors 21A, 21B, 21C, 21D, 21E, 21F, 21G, 21H has failed, the supply of AC current to the failed motor is prevented by the switch for travel corresponding to the failed travel motor. In this case, the ladle crane 1 is driven along the travel rails 17 by the remaining travel motor.

As shown in FIG. 7, AC power is supplied to the main transverse traveling motors 45A and 45B of the main trolley 9 from the main transverse traveling inverter devices 67A and 67B, and the main transverse traveling motor ( The rotational driving force is generated from 45A and 45B. The rotational driving force is transmitted to the main transverse running portion 9A so that the main trolley 9 runs in the transverse direction of the main girder 5 until the ladle 41 approaches the converter or the like.

At this time, the auxiliary transverse traveling switch 69 is cut off, and all of the AC power supplied from the main transverse traveling inverter device 67B is supplied to the main transverse traveling motor 45B.

Thereafter, the ladle 41 is inclined by the auxiliary winding device 71 so that molten steel in the ladle 41 is poured into a converter or the like.

When the ladle 41 is inclined by the auxiliary winding device 71, the auxiliary hook 85 is first wound up and the auxiliary trolley 11 is positioned at the position where the auxiliary hook 85 is caught by the inclined rotating hardware of the ladle 41. ) Travels in the transverse direction. When the auxiliary trolley 11 is driven in the lateral direction, as shown in FIG. 7, AC power is supplied from the auxiliary lateral traveling inverter device 95 to the auxiliary lateral traveling motor 73 of the auxiliary trolley 11. , Rotational driving force is generated from the auxiliary lateral traveling motor 73. Rotational driving force is transmitted to the auxiliary transverse running portion 93, and the auxiliary trolley 11 travels along the auxiliary girder 7 to a position where the auxiliary hook 85 is caught by the inclined rotating hardware of the ladle 41. .

At this time, the auxiliary transverse traveling switch 69 is cut off, and all of the AC power supplied from the auxiliary transverse traveling inverter device 95 is supplied to the auxiliary transverse traveling motor 73.

When the auxiliary hook 85 is caught by the inclined rotating hardware of the ladle 41, the auxiliary hook 85 is wound up by the auxiliary winding device 71, and the ladle 41 is inclined.

When the auxiliary hook is wound up, as shown in FIG. 6, an alternating current is supplied from the auxiliary winding inverter device 87 to the auxiliary winding motor 75 of the auxiliary winding device 71, and the auxiliary winding motor 75. Rotational driving force is generated. The rotational driving force is transmitted to the auxiliary winding drum 79 via the auxiliary winding reduction unit 77. The auxiliary winding drum 79 is rotationally driven by the transmitted rotational driving force.

As the auxiliary winding drum 79 rotates, the auxiliary wire 89 is wound around the auxiliary winding drum 79, and the auxiliary hook 85 which wound the oblique rotating hardware is wound upward. The ladle 41 is rotated about the axis 41a caught by the main hook 57, and molten steel is poured from the inclined ladle 41 to the converter.

Here, the attachment / detachment of the electric chamber 29 which is the characteristic of this embodiment is demonstrated.

FIG. 9 is a partial side view illustrating a state in which the electric chamber of FIG. 2 is separated from the main girder.

When replacing the electric chamber 29, as shown in FIG. 2, the hook of a crane etc. are fastened to the engaging part 35 of the electric chamber 29. As shown in FIG. Then, the coupling between the support part 31 and the coupling part 33 is released, and the electric chamber 29 is separated from the support part 31. The separated electric chamber 29 is suspended by a crane or the like and is separated from the ladle crane 1 as shown in FIG. 9.

The separated electric chamber 29 is lowered to a place where the main winding inverter device 59A or the like can be replaced or updated safely and easily. The worker performs the replacement or update work of the main winding inverter device 59A or the like in the electric chamber 29 taken down from the ladle crane 1. It is preferable that the place where the electrical chamber 29 is dismounted is a place with few dusts. This is because most steel mills and the like where the ladle crane 1 is installed are dusty places, and if dust enters the electric chamber 29, it may cause failure of the main winding inverter device 59A and the like.

When the replacement of the main winding inverter device 59A or the like is finished, the electric chamber 29 is lifted by the crane again, and is attached to the main girder 5 as shown in FIG. 2. Specifically, the electric chamber 29 is attached to the main girder 5 by combining the support part 31 and the coupling part 33.

According to the said structure, main winding inverter apparatus 59A, 59B, 59C, 59D, auxiliary winding inverter apparatus 87, main lateral traveling inverter apparatus 67A, 67B, and auxiliary lateral traveling inverter apparatus ( 95 and the components which are frequently upgraded, such as the inverter devices 23A, 23C, 23E for traveling, are concentrated in the electric chamber 29 arranged in the main girder 5, so that the main winding It is easy to replace or update an element used for power control such as a power semiconductor element used in the inverter device 59A or the like. Since the electric chamber 29 is provided separately from the main girder 5, the space in the electric chamber 29 is made larger than the case where the main winding inverter apparatus 59A etc. are provided in the space in the main girder 5, and the like. can do. Therefore, the operation | work etc. of the said element replacement | exchange in the electric chamber 29, etc. can be performed easily. Since the entry and exit into the electrical chamber 29 is facilitated, operations such as replacement and update of the device can be easily performed.

Since the electric chamber 29 is detachably arranged in the main girder 5, the main winding inverter device 59A or the like itself can be replaced while the electric chamber 29 is separated from the main girder 5. Since the electric chamber 29 separated from the main girder 5 can be moved to a place more suitable for replacing the main winding inverter device 59A or the like, the replacement of the main winding inverter device 59A or the like can be facilitated. have. As a place more suitable for the replacement of the main winding inverter device 59A or the like, it is a place lower than the high position where the main girders 5 are disposed, and a place having less dust or the like can be exemplified.

Alternatively, an electric room separate from the electric room 29 separated from the main girder 5 is prepared, and the electric room is replaced to replace the main winding inverter device 59A or the like, or to exchange or update the device. This can shorten the time required. The element, main winding inverter device 59A, and the like, which require replacement or the like, can be replaced with sufficient time after separating the electric chamber 29 from the main girder 5.

The main winding inverter device 59A or the like is concentrated in the electric chamber 29 and the electric winding 29 is placed in the main girder 5 to directly place the main winding inverter device 59A or the like in the main girder 5. In comparison with the arrangement, the number of installation parts such as the main winding inverter device 59A can be reduced. Since the electric chamber 29 arrange | positions the main winding inverter apparatus 59A etc. inside, it can be set as the structure suitable for installation of the main winding inverter apparatus 59A etc. inside. Therefore, compared with the case where it arrange | positions directly in the main girder 5, the number of installation parts used for installing the main winding inverter apparatus 59A etc. can be reduced.

By collectively performing wiring from the electric chamber 29 to the main girders 5, the time for wiring construction can be reduced as compared with the case of performing wiring for each main winding inverter device 59A or the like. Since the electric chamber 29 arrange | positions the main winding inverter apparatus 59A etc. inside, the wiring from the main winding inverter apparatus 59A etc. to the exterior of the electric chamber 29 can be created in the electric chamber 29 beforehand. Therefore, the time of wiring work in the replacement of the said element, such as main winding inverter apparatus 59A, etc., and the replacement of itself, such as main winding inverter apparatus 59A, can be reduced easily. By tying the wiring between the electrical chamber 29 and the main girder with one bundle of wires, the time for wiring work when the electrical chamber 29 is attached to or detached from the main girder 5 can be reduced.

In the ladle crane 1 of the present embodiment, the main winding inverter device 59A used for at least one of the movement of the respective girders 5 and 7 and the trolleys 9 and 11, the winding of the ladle 41, and the like. Since the electrical chamber 29 provided with) is detachably disposed in the main girder 5, the replacement of the main winding inverter device 59A or the like or the replacement of the element used in the main winding inverter device 59A or the like is performed. And so on. Since the electrical chamber 29 can be easily carried in and out of the main girder 5 from the outside, the electrical chamber 29 can be easily attached and detached by arranging the electrical chamber 29 in the main girder 5.

Since the engaging part 35 is provided in the electrical chamber 29, the electrical chamber 29 can be suspended by another crane, and the electrical chamber 29 can be easily installed and removed in a crane main body.

In particular, in the case of a large crane such as a ladle crane, the capacity required for the main winding inverter device 59A or the like becomes large, and the weight of the main winding inverter device 59A or the like becomes heavy. Since the weight of the electric chamber 29 provided with a plurality of such main winding inverter devices 59A and the like becomes heavy, it is necessary to use a crane to hang the electric chamber 29 when attaching and detaching the electric chamber 29 to the main girder 5. . By providing the engaging part 35 in the electrical chamber 29, since the electrical chamber 29 can be easily suspended using a crane, attachment and detachment of the electrical chamber 29 can be made easy.

In the ladle crane 1 of this embodiment, since the electric chamber 29 can be attached to the support part 31 of the main girder 5 via the coupling part 33, the electric room 29 is attached to the support part 31. As shown in FIG. Can be easily removed.

Since the support part 31 protrudes outward from the main girder 5 and is provided, it is difficult for the electric room 29 and the main girder 5 to interfere with each other when attaching and detaching the electric chamber 29 to the support part 31. The attachment and detachment work of the electrical chamber 29 becomes easy. The electrical chamber 29 can be separated by detaching the coupling portion 33 from the support portion 31, while the electrical chamber 29 can be attached to the electrical chamber 29 by coupling the coupling portion 33 to the support portion 31. 29) can be easily attached and detached.

Since the heat shield portion 37 is provided in the electric chamber 29, heat can be prevented from entering the electric chamber 29 from the outside, and failure of the main winding inverter device 59A due to heat and the like can be prevented.

For example, in the case where the ladle (furnace) in which molten steel is accommodated is a load, it is preferable that the heat shield 37 is arranged on the lower surface of the electrical chamber 29. By arranging the heat shields 37 in this way, the radiant heat from the molten steel can be prevented from entering the electrical chamber.

Even if the auxiliary winding inverter device 87 fails, the auxiliary winding motor 75 is operated by the main winding inverter device 59D. Thus, the auxiliary hook 85 is rolled up to move the girder to a safe position and then the electric chamber ( 29) can be separated.

In particular, even when molten steel is in the ladle 41, the electrical chamber is separated after the molten steel in the ladle 41 is transferred to the converter, thereby eliminating a very unnecessary time compared to the conventional one, and at the same time, the electrical chamber 29 The parts arranged inside can be repaired quickly and safely.

According to the present invention, a main girder is a component which is frequently upgraded such as a main winding inverter device, an auxiliary winding inverter device, a main transverse traveling inverter device, an auxiliary transverse traveling inverter device, or a traveling inverter device. Since it is concentrated in the inside of the electric chamber arrange | positioned at, the replacement and update of the element used for power control, such as a power semiconductor element used for main winding inverter apparatus etc., can be made easy.

Claims (7)

With the crane body, A girder provided in the crane body and moving along a traveling purlin; A trolley moving along the girder, A winding device provided in the trolley and winding up and down the hanging luggage; A motor used to adjust the position of the take-up device, move the girder, move the trolley, and wind up and unwind the hanging baggage by the take-up device; A motor controller for controlling the output of the motor by controlling power supplied to the motor; An electric chamber in which the motor control unit is disposed is provided, The electric chamber is detachably disposed on the girder. crane. delete The method of claim 1, The electric chamber is provided with an engaging portion engaged with the crane for hanging the electric chamber. crane. The method of claim 1, The girder is provided with a supporting portion for supporting the electrical chamber protruding outward, The electrical chamber is provided with a coupling part fixed to the support part in a detachable manner. crane. The method of claim 1, The electric chamber is provided with a heat shield to prevent intrusion of heat from the outside. crane. The method of claim 1, With the first motor, A plurality of first motor controllers provided in the electric chamber for controlling output of the first motor by controlling electric power supplied to the first motor, With the second motor, A second motor control unit provided in the electric chamber for controlling the output of the second motor by controlling the power supplied to the second motor, In the second motor, power supply and stop can be controlled from the first motor control unit. crane. The method of claim 6, The first motor control unit is any one of a plurality of control units for respectively controlling the output of the plurality of winding motors of the main trolley, The second motor control unit is a motor control unit of the motor for winding up the auxiliary trolley. crane.

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