Method and equipment for detecting broken wires of PCCP (prestressed concrete cylinder pipe)

Abstract

The invention discloses a PCCP (prestressed concrete cylinder pipe) broken wire detection method and detection equipment, and the method comprises the following steps: fixing an exciter during each detection, symmetrically scanning a detector along the axial direction of a pipeline by taking the exciter as a center, and orthogonally placing the exciter and the detector; the method adopts an acquisition mode of forward scanning once and reverse scanning once, performs pipeline abnormity identification detection through acquisition of detection signals, and comprises the following steps: performing error analysis on acquired data and reference value data, performing error analysis on symmetry of the acquired data, and taking a mean value of two error analysis as a final error; and when the final error is greater than the threshold value, the broken wire exists. The equipment comprises a vehicle frame, wherein a module bracket is arranged on the vehicle frame; the module bracket is used for supporting and fixing the power module and the excitation module; the guide bearing is used for vertically sliding the excitation module; the pushing handle and the four groups of wheels are used for pushing the equipment to move in the pipeline; and a driving mechanism and a detection module are further arranged at the bottom of the frame.

Description

technical field [0001] The invention relates to the field of detection of prestressed steel cylinder concrete pipes, in particular to a detection method and detection equipment for broken wires of PCCP pipes. Background technique [0002] Prestressed Concrete Cylinder Pipe (PCCP for short) is a high-performance composite pipe. PCCP is widely used at home and abroad because of its excellent performance. Since it was introduced into my country in the late 1980s, it has not only been widely used in large-scale water transfer projects such as agricultural and urban water transfer, and cross-basin water diversion, but also has been popularized in large-scale nuclear power plants and thermal power plants in circulating water projects and large-scale pressure drainage and sewage projects. , has become a national key promotion project, and is the preferred pipe material for long-distance, large-caliber, pressurized water conservancy projects. In China, a relatively complete industria...

AI Technical Summary

Problems solved by technology

[0006] At present, the detection equipment using the orthogonal electromagnetic detection system has appeared on the market, but most of the existing equipment have poor detection results, resulting in the failure to be put into normal use, which seriously affects the popularization of this method in the field of broken wire detection.

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