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Large-diameter thick-wall steel pipe welding equipment

A welding equipment and large-diameter technology, applied in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., can solve the problems of repair difficulty and reduce repair difficulty, improve welding quality, reduce temperature rise speed and temperature rise Quantity, guaranteed performance effect

Inactive Publication Date: 2021-06-15
浙江科鑫重工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the defect that the existing large-diameter thick-walled spiral welded pipe adopts one-time welding and is relatively difficult to repair, and provides a large-diameter thick-walled steel pipe welding equipment, which can be welded twice to reduce the difficulty of repairing

Method used

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  • Large-diameter thick-wall steel pipe welding equipment
  • Large-diameter thick-wall steel pipe welding equipment

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Embodiment 1

[0034] see figure 1 with figure 2 , a large-diameter thick-walled steel pipe welding equipment according to Embodiment 1 of the present invention, the welding equipment includes:

[0035] Positioning pre-welding device 1, the positioning pre-welding device 1 pre-welds the steel pipe;

[0036] Caliper measuring device, the diameter measuring device measures the diameter and ovality of the steel pipe;

[0037] A precision welding device 2, which performs performance welding on steel pipes;

[0038] Along the traveling direction of the steel pipe, the precise welding device 2 is located behind the positioning pre-welding device 1 .

[0039] As an improvement, the positioning pre-welding device 1 is located inside the steel pipe.

[0040] As an improvement, the precision welding device 2 is a five-wire welding device, in which three welding wires are outside and two welding wires are inside.

[0041] As an improvement, the positioning pre-welding device 1 and the precise wel...

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Abstract

The invention belongs to the technical field of steel pipe welding equipment, and particularly relates to large-diameter thick-wall steel pipe welding equipment. In order to overcome the defect that an existing large-diameter thick-wall spiral welded pipe is formed through one-time welding and is difficult to repair, the following technical scheme is adopted, the large-diameter thick-wall steel pipe welding equipment comprises a positioning pre-welding device, a diameter measuring device and a precise welding device, wherein the positioning pre-welding device is used for pre-welding the steel pipe; the diameter measuring device is used for measuring the diameter and the ovality of the steel pipe; the precise welding device is used for carrying out performance welding on the steel pipe; and the precise welding device is located behind the positioning pre-welding device in the advancing direction of the steel pipe. According to the large-diameter thick-wall steel pipe welding equipment, a secondary welding mode is adopted, diameter measurement is carried out after positioning and pre-welding, and repairing is conveniently carried out when the steel pipe is unqualified; and positioning pre-welding has a preheating effect, the steel pipe temperature rise speed and temperature rise amount are reduced, the welding quality is improved, and the steel pipe performance is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of steel pipe welding equipment, and in particular relates to a large-diameter thick-walled steel pipe welding equipment. Background technique [0002] At present, large-diameter thick-walled spiral welded pipes are widely used in the fields of steel pipe pile engineering, fluid conveying pipelines, and steel structures. It is crimped and welded to produce a spiral steel pipe with a helical weld and a butt weld (the welding seam of the previous steel strip tail and the rear steel strip head). Among them, the spiral weld is generally welded by double-sided automatic submerged arc welding, and the front of the butt weld (that is, the inner side of the spiral welded pipe) is generally welded by automatic submerged arc welding. [0003] The current spiral welded pipe production process is directly welded to form a spiral weld. However, during production, it was found that when the spiral weld seam is formed by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/053B23K37/04B23K37/00B23K101/06B23K103/04
CPCB23K37/00B23K37/0426B23K37/0533B23K2101/06B23K2103/04
Inventor 吴欣航徐旭锋任立纯陈静朴泷魏军张兴志桑巍张明
Owner 浙江科鑫重工有限公司
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