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Method for installing and constructing special-shaped large-tonnage steel castings

A construction method and technology of steel castings, applied in auxiliary devices, manufacturing tools, metal processing equipment, etc., can solve the problems of inability to use multi-directional oblique components, lack of flexibility of steel castings, single use parts, etc., and achieve improvement The effect of visual quality, ensuring construction quality and reducing consumption

Inactive Publication Date: 2015-05-20
YONGSHENG CONSTR GRP +1
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Problems solved by technology

This steel casting alleviates to a certain extent the superposition of the residual stress of the joint and the tearing of the steel casting body, but since the steel casting joint only has a round hole at the axis, it cannot be used in multi-directional skew members. At the intersecting node, the use part is single, and the cast steel node is a thick-walled steel casting, which occupies a large space, which makes the steel casting inflexible in engineering use

Method used

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  • Method for installing and constructing special-shaped large-tonnage steel castings

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Embodiment 1

[0023] Embodiment 1: as attached figure 1 As shown, during the construction process, while making temporary supports and installing temporary supports, material inspection, installation of lifting lugs, welding of lifting lugs and flaw detection of lifting lugs are carried out simultaneously; Correction, cast steel welding, flaw detection and support unloading complete the construction process.

[0024] Specific steps include:

[0025] ①Raw material inspection; steel castings must pass the quality inspection of the factory when they leave the factory, and issue a factory quality certificate. After entering the site, inspections of external dimensions, internal structures, wall thickness and all-round external surface magnetic powder must be carried out on site. Non-destructive testing, etc., to ensure that the steel castings can be used only after there are no defects;

[0026] ②Installation and welding of hoisting lugs; steel castings are not assembled with hoisting lugs be...

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Abstract

The invention discloses a method for installing and constructing special-shaped large-tonnage steel castings. The large-tonnage steel castings are complex in shape and are hoisted through a heavy crawler crane. Before the steel castings are hoisted, a symmetric method is adopted to analyze and determine the installing positions of lifting lugs of the steel castings, and a welding work platform is arranged on the welding portions of the steel castings in advance. In the installing and constructing process, a sling of the crawler crane is used for controlling the vertical displacement of the steel castings, a wind cable is used for adjusting the horizontal displacement of the steel castings, and the installation accuracy and construction safety of the steel castings are guaranteed by means of temporary support and other measures; after the steel castings are installed in place, the quality of weld joints is guaranteed through a series of processes such as weld preheating, in-process heat preservation and postweld heat treatment according to the material characteristics of the steel castings and up-down welding structures. By means of the method, the standard requirements for joints of the special-shaped large-tonnage steel castings are met, the construction quality is ensured, connection is more reasonable and effective, the consumption of steel is reduced, and meanwhile the appearance quality of a building is improved.

Description

technical field [0001] The invention relates to E04B building structure or other protective equipment, especially the installation and construction method of special-shaped large-tonnage steel castings. Background technique [0002] Special-shaped large-tonnage steel castings are made of cast steel. Similar properties to cast iron, but stronger than cast iron. Bubbles and inaccurate angle positioning are prone to defects during the casting process, and the casing may break during long-term use. Therefore, it is more necessary to apply the construction method correctly during the installation and construction process. Due to its excellent performance, the steel concrete structure is widely used in high-rise buildings and long-span structures, and it is also more and more used in complex space structures. The intersecting joints of multi-directional oblique members in steel-concrete structures often adopt special-shaped cast steel joints, and the cast steel parts are genera...

Claims

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Application Information

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IPC IPC(8): E04G21/14B23K31/02B23K37/00
Inventor 缪建国赵建雷毛华祥王双喜刘承华吴麟田玉新
Owner YONGSHENG CONSTR GRP
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