KR101992809B1 - Rubber tired gantry crane having noncontact power supplying system - Google Patents

Abstract

The present invention relates to a tire-type gantry crane that is supplied with power wirelessly, and more particularly, to a tire-type gantry crane capable of supplying electric power from the ground by radio using a self- To a tire-type gantry crane.
A tire-type gantry crane that is supplied with power wirelessly according to the present invention comprises: a crane main body in which a rechargeable battery is mounted using a tire as a supporting and moving means; A power collecting unit for receiving power from an external power supply unit and transmitting power to the device installed in the rechargeable battery or the crane; And a pick-up device for moving the current collector so that the current collector approaches the power feeder.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tire-type gantry crane,

The present invention relates to a tire-type gantry crane that is supplied with power wirelessly, and more particularly, to a tire-type gantry crane capable of supplying electric power from the ground by radio using a self- To a tire-type gantry crane.

Container terminal is a base for connecting maritime transportation using vessels and land transportation by trucks and trains for container unloading / take-off, container (berth) container berthing, container loading / unloading / Etc. are organically constructed so that the container logistics can be moved smoothly and also linked to land transportation including roads and railways. In order to smoothly transport container logistics in port, it is necessary to provide a system for efficiently managing the entire container terminal and to provide related facilities such as ship berthing facilities, container loading / unloading and transportation facilities, container warehousing and warehouse facilities It is important to secure enough.

The gantry crane installed in a container terminal or the like in connection with unloading / loading of a container is a port or crane-type port crane used to load a container loaded in a trailer or a container loaded in a trailer.

Such a gantry crane moves on a rail installed on the container terminal according to the traveling mode, and a rail type gantry crane, which receives power from the land via a cable reel, and a diesel generator mounted on the crane itself, , And many of the gantry cranes with a high degree of freedom are used in many container terminals.

FIG. 1 is a schematic view showing the outer appearance of a container terminal provided with a tire-type gantry crane, and FIG. 2 is a view showing a conventional tire-type gantry crane structure.

1, when the container line 1000 arrives at the port, the container is unloaded by the container crane 2000 installed in the port, and the unloaded container is moved by the gantry crane 3000 They are stacked and stored in each workshop (A to D), or they are transported by loading the stored containers on a yard chassis or yard tractor. The same is true for shipping a container carried by a yard chassis or yard tractor to a cargo ship 1000.

In the case of a conventional tire-type gantry crane, since power is supplied through a diesel generator installed in a crane, fuel cost is excessively consumed and environmental pollution such as air pollutant discharge and noise is generated.

Korean Patent Publication No. 10-2014-0096765 (Aug.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a gantry cranes, And to provide a receiving gantry crane.

In order to achieve the above object, a tire-type gantry crane powered by radio according to the present invention comprises: a crane main body to which a rechargeable battery is mounted using a tire as a supporting and moving means; A power collecting unit for receiving power from an external power supply unit and transmitting power to the device installed in the rechargeable battery or the crane; And a pick-up device for moving the current collector so that the current collector approaches the power feeder.

The pick-up device operates the slider so that the slider horizontally slides to move the slider to a plurality of positions on the feeder, detects a voltage induced by self-resonance in the slider, And a position control unit for automatically positioning the current collector at the in-position.

Specifically, the pick-up device includes a horizontal moving frame provided with the current collecting part and horizontally moving along the guide rail, a driving motor for providing power for moving the horizontal moving frame, A chain or a belt.

The tire-type gantry crane, which is supplied with power wirelessly according to the present invention, is connected to the crane body and moves along the crane body. The pick-up device is mounted, and a support frame Wherein a connection pin of the crane main body connected to the support frame is formed with an elongated slot hole in a vertical direction and a connection pin inserted in the slot hole and movable in the up and down direction along the slot hole, Respectively.

The power supply unit is supplied with power from the power supply unit in a self-resonant manner, and the power supply unit includes a power supply inverter for converting a nominal frequency of 60 Hz or 50 Hz to a high frequency to supply power, A cable, and a feed core disposed under the feed cable for inducing and shaping the magnetic flux, a capacitor for preventing voltage drop of the feed cable, and a casing for protecting the feed cable from the outside.

When the remaining amount of the rechargeable battery is within a predetermined use range, power is supplied from the rechargeable battery to a device installed in the crane, and the remaining amount of the rechargeable battery And a power controller for charging the rechargeable battery by operating the current collector and the position controller if the current is lower than the lower limit of the usage range.

Further, the tire-type gantry crane that is supplied with power wirelessly according to the present invention further includes a regenerative electric power generating device, wherein the crane main body includes a traveling device for moving, a hoisting jacking device for moving a heavy object up and down, Wherein the regenerative electric power generating device generates electric power when the braking of the traveling device or the braking operation of the traveling device or the braking of the transverse device is performed to charge the rechargeable battery.

The tire-type gantry crane powered by radio of the present invention can reduce the maintenance and repair costs without impairing the mobility of the existing tire-type gantry crane and does not cause environmental pollution.

Further, in the tire-type gantry crane powered by radio of the present invention, the current collectors are horizontally moved so as to prevent collision with other tire-type gantry cranes using the same feeder line, By moving the current collector horizontally at the top of the feeder to automatically set an optimum position with high wireless power transmission efficiency, the wireless power transmission efficiency can be kept at a maximum during the operation of the crane.

The tire-type gantry crane, which is supplied with power wirelessly according to the present invention, can save the total power consumption and the battery size by reusing the regenerative power stored in the battery.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a container terminal system formed in a port; Fig.
2 is a schematic view of a conventional tire-type gantry crane structure.
3 is a perspective view of a tire-type gantry crane powered wirelessly according to an embodiment of the present invention.
4 is an enlarged view of a current collector and a power feeder of a tire-type gantry crane powered by radio according to an embodiment of the present invention.
FIG. 5 is a side view of a lower structure of a tire-type can tree crane that is supplied with power wirelessly according to an embodiment of the present invention; FIG.
FIG. 6 is a front view of a state in which a connection portion of a tire-type can tree creel receiving power wirelessly and a support frame are separated according to an embodiment of the present invention; FIG.
FIG. 7 is a front view of a state in which a connection portion of a tire-type can tree creel that is wirelessly supplied with power and a support frame are combined according to an embodiment of the present invention; FIG.
8 is a view showing an operating state of a pickup apparatus according to an embodiment of the present invention.

3 to 8, a tire-type gantry crane that is supplied with power wirelessly according to an embodiment of the present invention includes a crane body 10, a support frame 20, a pickup device 23, a current collector 30, a position controller (not shown), a power controller (not shown), and a regenerative power generator (not shown).

The crane body 10 is equipped with a rechargeable battery using the tire as a supporting and moving means as shown in Figs. 3 to 5. In addition, the crane body 10 has a traveling device for movement, a hoisting-hoisting device for vertically moving a heavy object such as a container, and a transverse device for horizontally moving a heavy object.

As shown in FIG. 6, the crane body 10 is formed with a vertically long slot 12 in a connecting portion 11 connected to the support frame 20.

The support frame 20 has a plurality of revolving wheels 21 as supporting and moving means and is connected to the crane body 10 and moves along the crane body 10. [ Specifically, the support frame 20 is connected to the connecting portion 11 of the crane body 10.

The support frame 20 is provided with a connection pin 22 which is inserted into the slot hole 12 and can move up and down along the slot hole 12. Accordingly, even when the height of the crane body 10 changes due to the shrinkage or relaxation of the tire of the crane body 10 during handling of the heavy object, the support frame 20 maintains a constant height.

The supporting frame 20 is provided with a sliding device. A guide rail (24) for guiding horizontal movement of the current collector (30) is mounted on the support frame (20). A more detailed description will be given later.

Up device 23 horizontally moves the current collector 30 so that the current collector 30 approaches the power feeder 40. [

Specifically, the pickup device 23 is composed of a horizontal moving frame 23-1, a driving motor 23-2, and a chain or belt 23-3, as shown in Fig. The horizontal movement frame 23-1 horizontally moves along the guide rail 24. [ A plurality of rollers R are positioned in the horizontal movement frame 23-1 so that the horizontal movement frame 23-1 can smoothly move along the guide rails 24. [ In this horizontal moving frame 23-1, a current collector 30 is provided. The drive motor 23-2 is mounted on the support frame 20 and provides power for moving the horizontal movement frame 23-1. The chain or belt 23-3 transfers the power of the driving motor 23-2 to the horizontal moving frame 23-1 so that the horizontal moving frame 23-1 can move.

The current collector 30 receives power from an external power feeder 40 and delivers power to various devices installed in the rechargeable battery or the crane. The current collector 30 receives power from the power feeder 40 in a self-resonant manner. As described above, the current collector 30 is installed in the horizontal moving frame 23-1 and moves horizontally. The horizontal current collector 30 installed on the horizontal moving frame 23-1 moves to the upper portion of the power feeder 40 and receives power from the power feeder 40 wirelessly.

The power feeder 40 is installed along the moving path of the crane and supplies power to the power collecting unit 30, facing the power collecting unit 30 as shown in FIG. The power feeder 40 includes a power feed inverter (not shown), a feed cable 40-1, a power feed core 40-2, a capacitor (not shown), and a casing 40-3. The feed inverter converts the 60Hz or 50Hz nominal frequency to high frequency to supply power. The feed cable 40-1 is electrically connected to the feed inverter and receives a power supply to generate a magnetic field around the feed cable. The feed core 40-2 is installed below the feed cable 40-1 for induction and shaping the magnetic flux. The capacitor prevents voltage drop of the feed cable 40-1. The casing 40-3 protects the feed cable 40-1 from the outside.

The position controller (not shown) operates the pickup device 23 to move the current collector 30 to a plurality of positions above the feeder 40, as shown in FIG. At this time, a voltage induced by self-resonance is detected in the current collector 30, and the position of the current collector 30 is fixed at a position where the induced voltage is maximum. When the position of the current collector 30 relative to the power feeder 40 is changed or the voltage induced in the current collector 30 is decreased according to the traveling state of the crane, The device 23 is activated and the position of the current collector 30 is moved.

Meanwhile, as described above, the support frame 20 maintains a constant height even if the height of the crane body 10 changes due to the shrinkage or relaxation of the tire of the crane body 10 during handling of the heavy object. Accordingly, the current collector 30 and the feeder 40 are kept at a constant interval.

However, if the support frame 20 is not provided, the height of the crane body 10 is changed, and the distance between the current collector 30 and the power feeder 40 is changed. When the interval between the current collector 30 and the feeder 40 is wider than an appropriate interval, there is a problem that the power efficiency of the wireless power decreases. When the interval between the current collector 30 and the feeder 40 is narrower than the proper interval, the amount of wireless power transmitted increases, and the wireless charger, such as the power collecting unit 30 and the power feeder 40, .

For this reason, it is necessary to maintain a constant interval between the current collector 30 and the feeder 40 at an appropriate interval. The supporting frame 20 connected to the crane body 10 by the slot hole 12 and the connecting pin 22 and capable of moving up and down with respect to the crane body 10 is provided, It is possible to keep the wireless power transmission efficiency at a maximum regardless of the change.

The power control unit (not shown) supplies power from the rechargeable battery to various devices installed in the crane when the remaining amount of the rechargeable battery is within the preset usage range. The use range of the rechargeable battery is set by specifying the upper limit and the lower limit. Accordingly, when the remaining amount of the rechargeable battery is less than the lower limit of the use range, the power control unit operates the current collector 30 and the position control unit to charge the rechargeable battery. At this time, the power control unit may supply power to various devices installed in the crane in the rechargeable battery and directly supply power from the current collector 30 to various devices installed in the crane. When the remaining amount of the rechargeable battery exceeds the upper limit of the usage range, the power control unit stops charging the rechargeable battery.

A regenerative power generator (not shown) generates electric power and charges the rechargeable battery when a braking operation of the traveling device or a braking operation of the traversing device or a braking operation of the traversing device is performed.

The tire-type gantry crane that is supplied with power wirelessly according to the present invention is not limited to the above-described embodiments and can be variously modified and embodied within the scope of the technical idea of the present invention.

10: crane main body, 11: connecting portion,
12: slot hole, 20: support frame,
21: turning wheel, 22: connecting pin,
23: Pick-up device, 23-1: Horizontal moving frame,
23-2: drive motor, 23-3: chain or belt,
24: guide rail, 30: whole housing,
40: feeding part, 40-1: feeding cable,
40-2: feeding core, 40-3: feeding casing,

Claims (7)

A crane body using a tire as a supporting and moving means and equipped with a rechargeable battery;
A power collecting unit for receiving power from an external power supply unit and transmitting power to the device installed in the rechargeable battery or the crane; And
And a pick-up device for horizontally moving the current collector so that the current collector approaches the power feeder,
The power supply unit includes a feed inverter for converting a nominal frequency of 60 Hz or 50 Hz to a high frequency to supply power, and supplies power to the current collector by a self-
The pick-up device operates the slider to slide horizontally so as to move the current collector to a plurality of positions on the upper portion of the feeder even if a left / right deviation occurs during traveling of the crane, And a position controller for automatically positioning the current collector at a position where the detected induced voltage is maximum. The tire-type gantry crane as claimed in claim 1, delete A crane body using a tire as a supporting and moving means and equipped with a rechargeable battery;
A power collecting unit for receiving power from an external power supply unit and transmitting power to the device installed in the rechargeable battery or the crane; And
And a pickup device for horizontally moving the current collector so that the current collector approaches the power feeder,
The pick-
A horizontal moving frame installed with the current collecting part and horizontally moving along the guide rail,
A driving motor for providing power for moving the horizontal moving frame;
And a chain or belt for transmitting the power to the horizontal moving frame. A crane body using a tire as a supporting and moving means and equipped with a rechargeable battery;
A power collecting unit for receiving power from an external power supply unit and transmitting power to the device installed in the rechargeable battery or the crane; And
And a pickup device for horizontally moving the current collector so that the current collector approaches the power feeder,
Further comprising a support frame connected to the crane main body and moving along the crane main body, wherein the pick-up device is mounted, and a pivoting wheel is provided as a supporting and moving means,
A long slot hole is formed in the connection portion of the crane body connected to the support frame,
The supporting frame is provided with a connecting pin inserted in the slot hole and movable in the up and down direction along the slot hole so that the interval between the current collecting part and the feeding part is constantly maintained regardless of whether the crane is handled or not Tire type gantry crane powered by radio. The method according to claim 1,
Wherein the power-
A feed cable electrically connected to the feed inverter;
A power feeding core provided below the feed cable for induction and shaping of magnetic flux,
A capacitor for preventing the voltage drop of the feed cable;
Further comprising a casing for protecting the feed cable from the outside. The tire-type gantry crane according to claim 1, The method according to claim 1,
The power source is supplied from the rechargeable battery to the apparatus installed in the crane when the remaining amount of the rechargeable battery is within a predetermined usage range and the power collector and the position control unit are operated when the remaining amount of the rechargeable battery is less than the lower limit of the use range And a power controller for charging the rechargeable battery. The tire-type gantry crane according to claim 1, The method according to claim 1,
Further comprising a regenerative power generating device,
The crane main body includes a traveling device for traveling, a hoisting jacking device for moving the heavy material up and down, and a transverse device for horizontally moving the heavy material,
Wherein the regenerative electric power generating device generates electric power when the braking of the traveling device or the braking operation of the traverse device by the bobbin winding device or the braking device of the traversing device is performed to charge the rechargeable battery. Type gantry crane.

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