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Assessment device for fillet weld of end flange of GIS (gas insulated switchgear) and barrel and lossless assessment method

An evaluation device and a technology for fillet welds, which are applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problem of inability to detect internal air holes, unfused cracks, and the inability to effectively solve the non-destructive problems of end flanges and cylinder fillet welds Problems such as evaluation and inability to implement penetration testing, to achieve the effect of providing defect detection rate, easy discovery, and improving detection effect

Active Publication Date: 2014-04-16
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Penetration testing can only detect surface defects, but cannot detect defects such as internal pores, unfused, cracks that have not cracked to the surface
In addition, for GIS tanks in service, penetration testing cannot be performed in the 4 areas inside the fillet welds
Therefore, the existing detection methods cannot effectively solve the problem of non-destructive evaluation of GIS end flange and cylinder fillet welds

Method used

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  • Assessment device for fillet weld of end flange of GIS (gas insulated switchgear) and barrel and lossless assessment method
  • Assessment device for fillet weld of end flange of GIS (gas insulated switchgear) and barrel and lossless assessment method
  • Assessment device for fillet weld of end flange of GIS (gas insulated switchgear) and barrel and lossless assessment method

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Embodiment Construction

[0032] The present invention will be described in further detail below through the accompanying drawings and specific embodiments. The following examples are only descriptive and not restrictive, and cannot be used to limit the protection scope of the present invention.

[0033] Such as Figure 1-2In the ultrasonic phased array evaluation device for the GIS end flange and cylinder fillet weld shown, the scanning frame 6 is provided with two symmetrical positioning columns, and the housing of the wedge 5 is provided with two There are two symmetrically arranged positioning holes, and the connection between the wedge block 5 and the scanning frame 6 is realized through the cooperation of the positioning holes and the positioning columns. The encoder 7 is connected with the pin hole on the rear side of the scanning frame through its front pin shaft. The encoder 7 is a wheel-type incremental rotary encoder. The encoder 7 is connected to the ultrasonic phased array detector 9 thr...

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Abstract

The invention discloses an assessment device for a fillet weld of an end flange of a GIS (gas insulated switchgear) and a barrel and a lossless assessment method, aiming at solving the problem that an existing detection method cannot effectively achieve lossless assessment on the fillet weld of the end flange of the GIS and the barrel. The device is characterized in that an ultrasonic probe is installed on a wedge block, both the ultrasonic probe and a encoder are connected with a scanning rack so as to run synchronously, the encoder is connected with an ultrasonic wave phased array detector through a data line, the ultrasonic probe is connected with the ultrasonic wave phased array detector through the data line, and the surface of the ultrasonic probe is coated with a coupling agent and is connected with the wedge block through bolts. The assessment device can realize lossless assessment of total cross section of the structure, can detect both surface defect and interior defect, can detect both the outer fillet weld of the end flange of the GIS in service and the barrel and the inner fillet weld, and can comprehensively assess the quality of the structure.

Description

technical field [0001] The invention relates to the field of non-destructive testing of complete sets of electric devices, in particular to an evaluation device and a non-destructive evaluation method for the end flange and cylinder fillet weld of a gas-insulated closed combined electrical appliance based on an ultrasonic phased array. Background technique [0002] Gas insulated closed combined electrical equipment (referred to as GIS) is a complete set of equipment composed of circuit breakers, disconnectors, grounding switches, busbars and other high-voltage electrical appliances. These equipment or components are all enclosed in metal tanks and filled with certain pressure. (generally greater than 0.3MPa) of SF 6 Gas is used as insulation and arc extinguishing medium; among them, the GIS tank is a pressure-bearing part, requiring SF 6 The annual air leakage rate is less than 1%. [0003] The fillet weld between the GIS end flange and the cylinder body is the main weld o...

Claims

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Application Information

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IPC IPC(8): G01N29/04
Inventor 罗宏建周重回王炯耿赵洲峰张杰陈胤桢周正强孙庆峰
Owner STATE GRID CORP OF CHINA
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