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Process method for assembling and welding pile leg of ocean platform

A technology of offshore platforms and process methods, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve the problems of low welding qualification rate, large welding deformation, and low welding efficiency, and achieve small welding stress, fast operation, and improved The effect of construction efficiency

Inactive Publication Date: 2015-11-18
张家港润通海洋工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as large welding deformation; difficult assembly, low efficiency; low welding pass rate, high repair rate; low welding efficiency, etc.

Method used

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  • Process method for assembling and welding pile leg of ocean platform
  • Process method for assembling and welding pile leg of ocean platform
  • Process method for assembling and welding pile leg of ocean platform

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] The process method for assembling and welding offshore platform pile legs according to the present invention,

[0034] a Preparations before assembly

[0035] Such as figure 1 As shown, a pile leg assembly is composed of a rack 10 and two semicircular tubes 9. Before assembly, the rack 10 and semicircular tubes 9 should be carefully inspected to ensure that the products that flow into the next process are qualified products. Put the rack 10 flat on the ground, and completely remove the surface of the area to be welded on the upward side by grinding. After the requirements, install the welding steel liner, and immediately use the electric heating sheet for post-weld heat treatment and heat preservation after welding. After the weld has passed the non-destructive test, the longitudinal weld groove and the nearby 30mm area will be polish...

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Abstract

The invention discloses a process method for assembling and welding a pile leg of an ocean platform. According to the method, the production speed is high, and the percent of pass of products is high. A pile leg assembly is composed of a rack and two semicircular pipes. Coming cargo examination should be carried out on the rack and the semicircular pipes carefully, and the rack and the semicircular pipes are installed through a tool. The rack is turned over through a turnover device. The assembled pile leg examined to be qualified is lifted to an electric heating furnace stage trolley, conveyed into a furnace and heated, wherein the temperature ranges from 150 DEG C to 200 DEG C. The temperature in a hearth should be kept even. The heated pile leg is placed on the ground. Two welding joints are in the horizontal state. Manual welding rods are used for backing welding. Welding is performed on the pile leg by four welding workers from the middle position. The two sides are simultaneously and symmetrically welded. After welding is finished, the pile leg is turned over and welded continuously. After the welding joints are backed for 1 to 2 layers, the pile leg is lifted to roller carriers on a submerged arc welding production line and then formally welded. The welded pile leg is conveyed into a thermal treatment furnace, the heating temperature ranges from 200 DEG C to 280 DEG C and maintained for 2 to 3 hours, and then the pile leg is delivered out of the thermal treatment furnace.

Description

technical field [0001] The invention relates to a process method for assembling and welding offshore platform pile legs. Background technique [0002] The leg of the lifting offshore platform is usually composed of a rack and a semicircular tube. The material is ASTMA517 / A514 or equivalent ultra-high-strength quenched and tempered steel. It is relatively difficult to weld and has high requirements for precision. There are certain problems in some of the processing methods currently adopted. Such as large welding deformation; difficult assembly, low efficiency; low welding pass rate, high repair rate; low welding efficiency, etc. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a process method for assembling and welding offshore platform pile legs with fast production speed and high product qualification rate. [0004] In order to solve the above technical problems, the technical solution adopted in the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18B23K9/235B23K9/23
CPCB23K9/18B23K9/23B23K9/235
Inventor 邓黎李海生
Owner 张家港润通海洋工程科技有限公司
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