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Manufacturing process of girder of overhead or gantry crane

A crane and process technology, applied in the manufacturing process of the main beam of the gantry crane and the field of bridge type, can solve the problems of the lower deflection of the main beam of the crane, the lowering of the lifting weight, endangering the safety, etc. effect of life

Active Publication Date: 2010-12-29
傅萍 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the elastic deflection of the main girder is specified (calculated from the original camber), due to various reasons in the design, manufacture, and use, the main girder of the crane will be deflected and deformed. car", the lifting capacity drops, and even accidents occur, endangering safety

Method used

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  • Manufacturing process of girder of overhead or gantry crane
  • Manufacturing process of girder of overhead or gantry crane
  • Manufacturing process of girder of overhead or gantry crane

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Experimental program
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Embodiment Construction

[0015] The implementation of the present invention will be described in detail below with reference to the drawings.

[0016] The first step: preparation process:

[0017] The crane main girder, which has been completed according to the crane main girder manufacturing drawings and process, is hoisted, so that the lower cover plate is positioned at a height of 1.4-1.6 meters from the ground, at the bottom of the end girder and the four planes without the wheel support , Support the main beam and the end beam with a support frame or pad to make it fall stably.

[0018] Step 2: Welding process:

[0019] Place the tensioner box 1 in the outer box 28 of the additional rectangular parallelepiped tensioner, set up a number of reinforcing ribs as required through the transition plate, and weld them into a whole piece, and then weld the whole piece to the lower cover of the main beam 23 At one end of the plate, the rope joint hinge support 20 is placed in the additional rectangular box body 2...

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Abstract

The invention discloses a manufacturing process of a girder of an overhead or gantry crane, a threaded pull rod 7 in a box body 1 of a tensioning device is connected with a connecting seat 6, and the manufacturing process is characterized in that two wedge-shaped grooves are formed on the connecting seat 6, two rope head casting ports 5 with wedge-shaped outer shapes and square cone-shaped inner cavities are mounted in the grooves, two wedge-shaped grooves are formed on a fixed hinge 19 at the other end of a steel wire rope 3, and the rope head casting ports 25 with the wedge-shaped outer shapes and the square cone-shaped inner cavities are mounted in the grooves. The manufacturing process adopts the two groups for tensioning, the two groups are mounted on the same girder, and the ultimate tensioning force is great, thereby being applicable to manufacturing the girders of the cranes with the hoisting capacity of below 400 tons. The manufacturing process has the advantages of easy manufacturing, low cost and convenient construction, and is particularly applicable to manufacturing the gantry cranes with the span of above 60m in ports and the shipbuilding industry. The arch difference of the girder of the crane manufactured by adopting the invention can be controlled within 0-1mm, which is better than the international standard; furthermore, the manufacturing process can increase the cutting area of the girder structure, improve the strength, the static stiffness and the hoisting capacity of the girder, save steel, reduce the cost by 15-20%, be in line with the policies of energy conservation and emission reduction and prolong the service life of equipment.

Description

Technical field [0001] The present invention relates to a crane manufacturing process, in particular to a manufacturing process for main beams of bridge and gantry cranes (hereinafter referred to as crane main beam manufacturing). Background technique [0002] Bridge and gantry cranes are special equipment widely used by industrial and transportation material companies. In order to ensure the requirements of crane performance and avoid the phenomenon of "climbing" and "slipping" of electric trolleys, the main beam of the crane must have a certain degree of camber , my country’s crane manufacturing technical standards stipulate the degree of camber of the main girder in the span when the main girder is empty (L K Is the span of the crane). At the same time, the elastic deflection of the main beam is specified (Calculated from the original upward camber), due to various reasons in the design, manufacturing, and use, the main girder of the crane will be deformed downward. "Car", t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C6/00
Inventor 傅萍傅昆傅国华
Owner 傅萍
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