Rail-mounted container gantry crane

Abstract

The invention discloses a rail-mounted container portal crane. The rail-mounted container portal crane comprises a door frame steel structure, cart operating mechanisms, a lifting mechanism, a sling assembly, a sling horizontally-moving mechanism and a sling tilted rotation mechanism. The door frame steel structure comprises supporting legs and a door frame main beam. The cart operating mechanisms are arranged at the bottom ends of the supporting legs and used for driving the operating direction of a cart to be perpendicular to the length direction of a container. The lifting mechanism comprises a coiling block and a driving mechanism of the coiling block, and further comprises first and second steel wire rope sets which are connected to the coiling block and extend towards the two ends of the door frame main beam. The sling assembly is arranged below the door frame main beam, and the two ends in the vertical direction of the sling assembly are connected with the first and second steel wire rope sets correspondingly. The sling horizontally-moving mechanism comprises first and second pulley blocks located at the two ends of the door frame main beam correspondingly, and driving pieces for driving the pulley blocks. The first driving piece and the second driving piece are used for driving the first pulley block and the second pulley block in the same direction. The sling tilted rotation mechanism is connected with the two ends in the vertical direction of the sling assembly. According to the rail-mounted container portal crane, the structure is simplified, and cost is lowered.

Description

technical field [0001] The invention relates to equipment for container yards in ports, in particular to a gantry crane for rail-type containers. Background technique [0002] With the development of the container transportation industry, container yards are often equipped with rail-mounted container gantry cranes (RMG for short) for stacking operations. The structure of the RMG of the prior art is as figure 1 As shown, it includes a door frame steel structure 91, a mobile trolley 92, a hoisting mechanism 93, a spreader 94, a ladder platform 95, a cart operating mechanism 96 and a mobile power supply device 97. In the RMG structure of the prior art, the running direction of the cart running mechanism 96 ( figure 1 The middle paper direction) is parallel to the container length direction, and the mobile trolley 92 moves left and right on the door frame steel structure 91. The 94 movement of the spreader is realized through the combined movement of the cart and the trolley,...

AI Technical Summary

Problems solved by technology

The mobile trolley 92 is equipped with trolley running mechanism, trolley mobile cable power supply device, etc., which has complex structure and high cost

The mobile trolley 92 is self-heavy, and the action point on the door frame is located in the middle of the door frame. The steel structure 91 of the door frame is subjected to a large force, the structure is huge, and the design and manufacturing costs are high; and the RMG whole machine generates a large wind load, and the wheel pressure of the whole machine is large. Wharf construction High cost; takes up a lot of space, and the utilization rate of the storage yard is small

[0003] In addition, the hoisting mechanism 93 usually adopts a wire rope winding system, such as Figure 4 As shown, including reel 98, spreader pulley block 99 and tilting device 90, because the wire rope is flexible, when the cart or trolley runs and brakes, the spreader 94 will sway, which will bring difficulties to the positioning of the grab box and improve the efficiency. reduce

If the swing is controlled, a special anti-sway mechanism or device needs to be installed, and the anti-sway structure of the spreader is complicated and the cost is high

In order to adapt to the storage yard, the gauge of RMG has various specifications, and each product needs to be independently designed according to non-standard, and the construction cost of the terminal is high

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