Space array device and method for ultrasonic detection of gas switch equipment

Abstract

The invention discloses a space array device for ultrasonic detection of gas switch equipment. The device comprises more than two sensor fixing subsystems, and two adjacent sensor fixing subsystems are rotatably connected together; each sensor fixing subsystem comprises two mounting frame units, a bridging unit, a transverse adjusting unit, a longitudinal adjusting unit and a sensor unit; the bridging unit is bridged on the two adjacent mounting frame units; the longitudinal adjusting unit is arranged on the bridging unit; every two adjacent sensor fixing subsystems share one mounting frame unit. When the space array device is used for carrying out ultrasonic detection on the gas switch equipment, a plurality of parts of the equipment do not need to be tested, so that the consumed time isshort, and missing detection is not easy to occur; meanwhile, the space array device can realize transverse and longitudinal adjustment, and meets the requirements of detection of different environments; and the space array device is adjusted through the adjusting units, and meanwhile, through scale control, the adjusting precision is high.

Description

technical field [0001] The invention relates to the field of fault detection of gas switchgear, in particular to a space array device and method for ultrasonic detection of gas switchgear. Background technique [0002] At present, the ultrasonic detection of switchgear mainly adopts the method of moving a single sensor along the surface of the equipment; the detection points are selected at the fracture of the circuit breaker, the disconnector, the grounding switch, the current transformer, the voltage transformer, the lightning arrester, and the conductor connecting parts. Wipe clean the outer surface of the housing to which the sensor is attached, and the distance between detection points should be smaller than the effective detection range of the detection instrument. If the effective detection range of the detection instrument cannot be determined, detection points can be set every 0.5m along the axis of the GIS shell, and the detection points should be selected as far a...

AI Technical Summary

Problems solved by technology

If the effective detection range of the detection instrument cannot be determined, detection points can be set every 0.5m along the axis of the GIS shell, and the detection points should be selected as far as possible below the side of the gas chamber. In addition, the position of each detection point should be kept consistent so as to facilitate comparative analysis; evenly apply a special detection coupling agent on the detection surface of the ultrasonic sensor, and apply appropriate pressure to the outer surface of the shell to minimize signal attenuation. The sensor should remain relatively still with the GIS shell. For high-altitude equipment, such as some GIS bus bar air chambers, the sensor can be supported by supporting insulating support rods close to the outer surface of the shell for detection, but it must be ensured that the sensor and the live parts of the equipment are sufficiently safe. Distance; observe the detected signal on the display interface, and the observation time is not less than 15 seconds. If the signal is found to be normal, and the amplitude and 50Hz / 100Hz frequency correlation is low, save the data and continue to the next point of detection; if the signal is found to be abnormal , then perform multi-point detection in the gas chamber, extend the detection time and record multiple sets of data for amplitude comparison and trend analysis. In order to accurately conduct phase correlation analysis, the synchronization signal can be drawn from the device body to the detection instrument; this traditional method Strong experience is required, and it needs to be tested on multiple parts of the equipment, which generally takes a long time and is prone to missed tests, so it needs to be improved

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