Ultrasonic nondestructive testing chain type scanning frame for large-diameter pipeline

Abstract

The invention discloses an ultrasonic nondestructive testing chain type scanning frame for a large-diameter pipeline. The ultrasonic nondestructive testing chain type scanning frame for the large-diameter pipeline comprises a scanning mechanism, a head chain link, a tail chain link and a plurality of ordinary chain links; the head chain link, the plurality of ordinary chain links and the tail chain link are mutually buckled, connected in series and nested on a pipeline to form a chain ring; the scanning mechanism is connected in series between the ordinary chain links. For the ultrasonic nondestructive testing chain type scanning frame for the large-diameter pipeline, assembly work and disassembly work are both very simple and convenient; in addition, the assembly work and the disassemblywork can be performed without using a tool, so that the unfavorable conditions, including forgetting of carrying the tool, inappropriate tool, tool loss and the like, that may influence detection workare avoided, and the working efficiency of field detection is greatly improved at the same time.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to an ultrasonic nondestructive testing chain-type scanning frame for large-diameter pipelines. Background technique [0002] Large-diameter pipes generally refer to metal pipes with an outer diameter greater than 200mm, and are widely used in petrochemical, pressure equipment, boiler manufacturing, electric power industry, nuclear power industry and other fields. This type of pipe fittings is characterized by large conveying flow, long conveying distance and wide construction layout. Because such pipes are used in a wide range of areas, once a problem occurs, it is very likely to cause major accidents such as pollution to the surrounding environment or even an explosion. Therefore, it is necessary to ensure that the performance of such pipe fittings meets the use and safety requirements. And because the geographical location of the layout is remote and desolate, and the layout ra...

AI Technical Summary

Problems solved by technology

[0006] These two solutions have their own advantages and disadvantages. The disadvantage of the scanning frame with magnetic rollers is that the magnetic rollers have a large adsorption force, which makes it easy to pinch hands during assembly; the large adsorption force of the magnetic wheels makes it difficult to remove the main frame from the workpiece to be tested during disassembly. ; and the magnetic roller is easy to absorb some iron filings, which is inconvenient to clean and maintain; in addition, the main frame's track is seriously affected by human beings, and deviations are prone to affect the detection effect

The disadvantage of the chain scanning frame is that the assembly efficiency is low. In order to ensure the coupling effect, the probe generally adopts some structures to press on the workpiece under test, so that the workpiece under test has a reaction force on the chain link, which leads to the installation of the chain ring. And the adjustment efficiency is low; in addition, with the increase of pipe diameter, the number of chain links used also increases, and the chain link installation process is prone to bias, which affects the walking track of the probe

Images