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Phased array imaging detection method for electrofusion welded joints of steel skeleton polyethylene composite pipes

A technology for welding joints and imaging detection, which is applied in the direction of measuring devices, processing detection response signals, instruments, etc., can solve the problem of difficult detection of resistance wires, and achieve the effect of improving the problem of detection blind spots

Active Publication Date: 2021-09-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the traditional ultrasonic technology is used to detect the electrofusion welded joints of steel skeleton polyethylene composite pipes, since the perforated steel plate has strong structural interference reflection for the propagation of the sound beam, the resistance wire located under the vertical projection of the perforated steel plate will be due to its It is extremely difficult to detect due to the positional relationship, resulting in a large detection blind spot, such as figure 2 shown

Method used

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  • Phased array imaging detection method for electrofusion welded joints of steel skeleton polyethylene composite pipes
  • Phased array imaging detection method for electrofusion welded joints of steel skeleton polyethylene composite pipes
  • Phased array imaging detection method for electrofusion welded joints of steel skeleton polyethylene composite pipes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Obtain the electric fusion welding joint of the steel skeleton polyethylene composite pipe to be tested and the one-dimensional linear array phased array probe.

[0036]Debug the ultrasonic phased array detector 5. Specifically, set the detection parameters of the three line-scan channels according to the joints to be tested. Among them, the line-scan channel mode for 0° vertical detection can be adjusted according to the conventional PE pipe electrofusion welding joint line. Scan detection requires setting, and the other two channel modes are linear scan mode with preset angle and setting opposite to the deflection direction of the preset angle. It should be noted that the preset angle should not exceed 15°.

[0037] Apply ultrasonic coupling agent evenly on the outer detection surface of the electric fusion welding joint of the steel skeleton polyethylene composite pipe to be tested, place the phased array linear array probe 3 on the detection surface on which the coup...

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Abstract

The invention discloses a phased array imaging detection method for electric fusion welding joints of steel skeleton polyethylene composite pipes. During the inspection process, the above-mentioned three linear scan parameter setting channel modes are continuously switched on the premise that the phased array linear array probe does not move, and the computer receives the B-scan images formed in the three linear scan parameter setting channel modes and the corresponding The A-sweep type signal of the current three linear scan parameters is used to calculate the spatial range of the detection area in the channel mode, and the signal with the largest amplitude at the same spatial position is selected as the sound pressure amplitude response of the spatial position to form The new B-scan image, and then display the new B-scan image on the touch screen, this method can perform one-time ultrasonic detection imaging for the steel skeleton polyethylene composite pipe electrofusion welding joint.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic non-destructive testing, and relates to a phased array imaging testing method for electric fusion welding joints of steel skeleton polyethylene composite pipes. Background technique [0002] The steel skeleton polyethylene plastic composite pipe is made of low carbon steel wire as the reinforcement phase and high density polyethylene (HDPE) as the matrix. The steel wire is spot welded into a mesh and the plastic extrusion filling is carried out simultaneously, and it is continuously extruded on the production line. Double-sided anti-corrosion pressure pipes. The polyethylene is connected together through metal mesh, and the pipe structure is similar to reinforced concrete. The connection of the steel skeleton plastic composite pipe adopts two methods of electrofusion connection and flange connection. Among them, the electrofusion connection is to insert the composite pipe into the electrofusi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/06G01N29/26G01N29/48G01N29/44
CPCG01N29/069G01N29/26G01N29/4445G01N29/48G01N2291/0231G01N2291/0289G01N2291/044G01N2291/106G01N2291/267
Inventor 戚东涛齐国权张冬娜邵晓东丁楠
Owner BC P INC CHINA NAT PETROLEUM CORP
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