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Main girder of a crane and processing method thereof

A processing method and crane technology, applied in metal processing equipment, manufacturing tools, support structures, etc., can solve problems such as inability to offset deflection and inability to complete large-span beam processing, and achieve increased rigidity, easy installation, and neat welds. Effect

Active Publication Date: 2018-03-27
CHANGZHOU CHANGKUANG HOISTING MACHINERY
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  • Abstract
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Problems solved by technology

[0003] In actual production, due to the limitations of traditional technology and deflection calculation methods, it is impossible to complete the processing of long-span beams. After calculating the camber value according to the provisions of "Mobile Crane", when the span of the beam body exceeds a certain value, it still cannot offset the deflection caused by the bending moment due to its own weight in actual working conditions

Method used

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  • Main girder of a crane and processing method thereof
  • Main girder of a crane and processing method thereof
  • Main girder of a crane and processing method thereof

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Embodiment Construction

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] The embodiments of the present invention are written in a progressive manner.

[0037] like Figure 1 ~ Figure 4 As shown, a main girder of a crane includes a first web 1, a second web 2, a reinforcement frame, a top plate 4 and a bottom plate 5, and the top plate 4 and the bottom plate 5 are respectively connected to the first ...

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Abstract

The invention discloses a crane main beam. The crane main beam comprises a first web, a second web, reinforced frames, a top plate and a bottom plate. The top plate is connected with the top of the first web, and the bottom plate is connected with the bottom of the second web. The reinforced frames are arranged in the main beam at intervals and are fixedly connected with the first web, the second web, the top plate and the bottom plate respectively. The first web and the second web are each provided with a camber. The first web and the second web are both formed in a sequence welding manner. Staggering distances are set between segmented weld joints of the first web and between segmented weld joints of the second web. Due to the fact that the first web and the second web of the main beam are formed in the sequence welding manner and a certain staggering distance is kept between every two adjacent segmented weld joints of the two webs, stress of the main beam is dispersed because of arrangement of the weld joints; due to a new machining technology, the rigidity of the main beam is enhanced, and flexibility caused when a long-span main beam generates bending moment because of dead weight is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a main girder of a crane and a processing method thereof. technical background [0002] Cranes are widely used in industrial and mining enterprises at home and abroad. According to the requirements of relevant national standards, the camber of the main girder is an important technical index of the crane. The main girder will produce deflection under the action of its own weight. , during construction, the bracket must be set with a certain amount of camber value to offset the deflection caused by the bending moment caused by its own weight. [0003] In actual production, due to the limitations of traditional technology and deflection calculation methods, it is impossible to complete the processing of long-span beams. After calculating the camber value according to the provisions of "Mobile Crane", when the span of the beam body exceeds a certain value, it still cannot offset the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C6/00B23K31/02
CPCB23K31/02B66C6/00
Inventor 王守岗夏崇汉刘云峰李享贾宁宁周颖宋国柱
Owner CHANGZHOU CHANGKUANG HOISTING MACHINERY
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