Phased array ultrasonic detection method for curved surface fillet weld of pile leg racks of drilling platform

A technology for drilling platform leg and ultrasonic detection, which is applied to the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problems of poor detection repeatability, difficulty in on-site detection, and difficulty in quantification and positioning, reducing labor, overcoming inefficiency, Overcome the effect of influence

Inactive Publication Date: 2014-08-27
上海振华重工集团机械设备服务有限公司 +1
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Problems solved by technology

Due to the curvature problem of the fillet weld on the curved surface of the rack and leg, only conventional ultrasonic testing can be used at present, which makes on-site testing very difficult, mainly reflected in: the efficiency of manual conventional ultrasonic testing is low, and too much manpower is required , it is difficult to quantify and locate, and at the same time, the detection repeatability is poor and the reliability is low

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  • Phased array ultrasonic detection method for curved surface fillet weld of pile leg racks of drilling platform
  • Phased array ultrasonic detection method for curved surface fillet weld of pile leg racks of drilling platform
  • Phased array ultrasonic detection method for curved surface fillet weld of pile leg racks of drilling platform

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0018] Phased array ultrasonic detection is to control the excitation pulse time delay of each array element in the transducer, and change the phase relationship when the sound wave emitted (or received) by each array element reaches (or comes from) a certain point in the object to achieve focusing and sound beam For the effect of deflection, the electronic technology of the delay circuit is used to control the synthesis of the phased array probe to realize the functions of ultrasonic transmission and reception. The phased array probe has multiple small chips, and each chip is independently excited. According to the different sound paths of each chip relative to the target to be detected, different delay times are applied to achieve changes in the angle and focus of the...

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Abstract

The invention provides a phased array ultrasonic detection method for a curved surface fillet weld of pile leg racks of a drilling platform. A fillet weld to be detected is a fillet weld between an arc-shaped string pipe and a rack plate. The method comprises the step of emitting phased array ultrasonic waves into the outer curved surface of the arc-shaped string pipe to detect defects in the fillet weld, wherein the transverse wave incidence angle of the phased array ultrasonic waves ranges from 35 degrees to 75 degrees, and the distance between the incidence point of the phased array ultrasonic waves and a beveled edge face, located on one side of the rack plate, of the fillet weld ranges from 70 mm to 140 mm. The phased array ultrasonic detection method for the curved surface fillet weld of the pile leg racks of the drilling platform can remarkably improve flaw detection rate and detection efficiency.

Description

technical field [0001] The invention relates to a phased array ultrasonic detection method for the fillet weld of the curved surface of the pile leg rack of the drilling platform. Background technique [0002] The offshore oil drilling platform has been in the harsh marine environment for a long time. The construction quality is an important condition to ensure its safe operation, and the welding quality is the key. Therefore, the inspection of the welding quality in the construction process of the drilling platform is an important guarantee for the construction quality. [0003] The curved surface fillet weld of the leg rack of the jack-up drilling platform is a key part of the drilling platform, and its welding quality directly affects its use and safety. Due to the curvature problem of the fillet weld on the curved surface of the rack and leg, only conventional ultrasonic testing can be used at present, which makes on-site testing very difficult, mainly reflected in: the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 郭超袁智勇陆建华张华军陈贻平陈利新张贯理郭云飞
Owner 上海振华重工集团机械设备服务有限公司
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