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Double-upper trolley gantry crane

A technology of gantry crane and trolley, applied in the field of gantry crane, can solve the problems of low utilization rate and insufficient production capacity of the dock

Inactive Publication Date: 2012-08-01
SHANGHAI ZHENHUA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small-tonnage, small-span gantry cranes can no longer meet the needs of shipyards, and the contradiction between low dock utilization and insufficient production capacity has become increasingly prominent
Long-span, large-tonnage gantry cranes have become a trend in the development of gantry cranes. The three-point lifting operation method of traditional gantry cranes, one with two hooks on the trolley and one with one hook on the lower trolley, limits the continuous large-scale operation in sections. Transformation: The coverage area of ​​the hoisting point is a triangle, and the center of gravity of the object to be hoisted must be within the range of the triangular sub-area. Therefore, the maximum lifting capacity of traditional gantry cranes generally does not exceed 1000t. technical bottleneck

Method used

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  • Double-upper trolley gantry crane

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Embodiment Construction

[0014] refer to figure 1 , the present invention proposes a double upper trolley gantry crane to solve the problems existing in the prior art. Such as figure 1 As shown, the double upper trolley gantry crane 300 includes:

[0015] The main beam 301, the upper side of the main beam 301 is laid with an upper track 302, and the lower side of the main beam 301 is laid with a lower track 303. Two legs 401 and 402 are respectively connected to two ends of the main beam 301, and the two legs 401 and 402 run on the ground track.

[0016] Two upper trolleys 100 are run on the upper rail 302 of the main girder, and one lower trolley 200 is run on the lower rail 303 of the main girder, wherein each upper trolley 100 has two suspension hooks 101, and the lower trolley 200 has a suspension hook 201 .

[0017] The two upper trolleys 100 jointly define a rectangular lifting coverage area, and the four top ends of the rectangular lifting coverage area correspond to the positions of the fo...

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Abstract

The invention discloses a double-upper trolley gantry crane, comprising two upper trolleys running on the upper track of a main beam and a lower trolley running on the lower track of the main beam, wherein each upper trolley is provided with two lifting hooks, and the lower trolley is provided with a lifting hook. The cooperation of the upper trolleys and the lower trolley can guarantee that the traditional function of turning over is not affected and any upper trolley can combine with the lower trolley to operate to turn over sectionally. Each upper trolley has two lifting hooks, when conducting the lifting operation, the four lifting hooks of the two upper trolleys cover a rectangular area, thus the coverage area doubles. Because of the increasing of the coverage area, the stability of lifting weight is greatly enhanced.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a gantry crane. Background technique [0002] The gantry crane, also known as the gantry crane, is used to assemble the hull of the berth. There are always two lifting trolleys: one has two hooks and runs on the track of the upper flange of the main girder bridge; Running on the track of the lower flange of the main girder bridge, the upper and lower two lifting trolleys cooperate to flip and hoist large hull segments. [0003] The utilization and development of marine resources by humans has promoted the development of the shipbuilding industry, and also put forward higher requirements for shipbuilding gantry cranes. Small-tonnage, small-span gantry cranes can no longer meet the needs of shipyard production, and the contradiction between low dock utilization and insufficient production capacity has become increasingly prominent. Long-span, large-tonnage gantry cranes have become a trend ...

Claims

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Application Information

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IPC IPC(8): B66C19/00B66C5/02
Inventor 张明海周筱川赵永新
Owner SHANGHAI ZHENHUA HEAVY IND