Portable pressure pipeline welding seam digital X-ray detection remote control positioning device

Abstract

The invention relates to a portable pressure pipeline welding seam digital X-ray detection remote control positioning device, which comprises: a synchronous belt, a positioning trolley composed of a trolley frame, a driving support, a driving gear motor, a coupler, a driving shaft, a driving bearing, a driving wheel, a driven support, a driven shaft, a driven wheel bearing, a driven wheel, a tensioning support, a tensioning shaft, a tensioning wheel bearing and a tensioning wheel, a flexible arm, a trolley control unit and a control terminal. The device adopts the synchronous belt as a constraint apparatus and a rotating track of the positioning trolley simultaneously, so that the weight of the device is reduced, the size is reduced, and the device is convenient to carry on site; a digitalX-ray emission source and an imaging plate are connected together through the flexible arm and the positioning trolley, so that after a detector fixes the positioning trolley, the two sets of devicesdo not need to be installed and positioned respectively, and the efficiency of first-time positioning is improved; remote control over the positioning trolley is achieved through a wireless image transmission module and a wireless remote control switch, so that detection personnel do not need to run back and forth in the process of detecting other circumferential positions of the same welding seam, and the repositioning efficiency is greatly improved.

Description

technical field [0001] The invention relates to a positioning device for digital X-ray detection of pressure pipeline welds, in particular to a portable remote control positioning device for digital X-ray detection of pressure pipeline welds applied to engineering sites. Background technique [0002] Pressure pipeline is a kind of special equipment closely related to people's production and life. As an important infrastructure for production and life, my country's pressure pipeline has the characteristics of large number, variety and rapid development. The safety of pressure pipeline has become an important part of my country's public safety. part. Pressure pipeline accidents often cause heavy economic losses, strong social impact, serious environmental pollution, and high risk of fire and explosion. Therefore, the safety detection of pressure pipelines has always been one of the important tasks strictly controlled by countries all over the world. [0003] Digital X-ray ins...

AI Technical Summary

Problems solved by technology

[0004] However, the current problem is that in the inspection process of the circumferential welds of various pressure pipelines, digital X-ray inspection is not like traditional film imaging. When using film imaging, after the fixed positioning of the X-emitting source equipment, It is more convenient to paste and fix the film; when using digital X-ray detection, since the emission source and imaging device are relatively heavy, both sets of devices must be installed and positioned manually before the detection can be carried out

In addition, after completing the installation and positioning of the emission source and the imaging device, in order to avoid the harm of radiation to the human body, the inspector must go to a position far away from the X-ray emission source (generally more than 50m) to start the emission source for shooting. After the completion, you can return to the site and adjust the next circumferential position of the positioning emission source and imaging device on the same weld. The inspection of a weld needs to go back and forth 3-6 times. The inspection work is labor-intensive and the efficiency is difficult to improve.

[0005] At present, there are many studies on digital X-ray detection and positioning devices. Most of them use cable ties to bind or use mechanical brackets for fixed positioning, which cannot meet the requirements of remote control positioning and portable on-site use at the same time.

In February 2013, Zhang Yanling (Daqing Oilfield Engineering Construction Co., Ltd.) and Pang Zhongrui (China Petroleum and Natural Gas Pressure Pipeline Bureau) developed a detection and positioning device in the article "Development and Application of Digital Imaging Detection and Positioning Device for Welded Pipe Test Pieces", which can complete rotation, Forward, backward and up and down 3 degrees of freedom movement, the rotation is driven by a stepping motor, and the speed can be controlled, but this positioning device can only detect welded pipe specimens, and cannot detect pressure pipe welds on site, and is not portable

In June 2016, Zhou Wucheng and Sun Zhenyu (Zhuzhou CRRC Special Equipment Technology Co., Ltd.) discussed the structure and principle of the positioning device for X-ray flaw detection composed of transverse tubes of train bogies in "The positioning device for X-ray flaw detection composed of transverse tubes". It is stated that a simple and economical method is provided for X-ray flaw detection composed of horizontal pipes, but the detection and positioning device is a fixed device in the train manufacturing plant, which cannot meet the needs of on-site detection and portability of pressure pipe welds

In June 2017, Zhang Shubin (Anhui University of Science and Technology) analyzed the X-ray detection film cloth of austenitic stainless steel splicing welds in the vacuum chamber of China's nuclear fusion engineering test unit in the article "Design of CFETR Vacuum Chamber Radiation Detection Fabric Positioning Device" A design scheme of automatic positioning device was proposed in the section of filming, but the positioning device is also limited to the work of the film and film in the vacuum chamber, which cannot meet the detection and positioning of the welding seam of the pressure pipeline on site.

In April 2017, Cui Yunlong, Li Chengchao, and Liu Liangliang proposed a positioning device design scheme for girth weld overhead pressure pipelines in the article "Design of Pressure Pipeline Radiation Detection Devices". The problem of difficult installation of detection equipment does not consider the portability of the positioning device

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