High-voltage isolation switch operation box main shaft torque calibration sensor and calibration method

Abstract

The invention relates to a high-voltage isolation switch operation box main shaft torque calibration sensor and calibration method, which are used for on-site calibration of a torque sensor arranged on a high-voltage isolation switch operation box main shaft. The torque sensor includes a full-bridge measuring circuit formed by four piezoelectric plates pasted on the main shaft, a power supply, an amplifier and an AD converter, the calibration sensor includes a clamping assembly, a rocker arm and a handle connected in sequence, a standard torque sensor is arranged between the rocker arm and the handle, the clamping assembly enclasps the main shaft, and the standard torque sensor and the torque sensor are connected with an external detector. Compared with the prior art, the high-voltage isolation switch operation box main shaft torque calibration sensor provided by the invention has the advantages of being suitable for the site, and being objective and accurate.

Description

technical field [0001] The invention relates to a switchgear for power supply or power distribution, in particular to a high-voltage isolation switch operation box spindle torque calibration sensor and calibration method. Background technique [0002] High-voltage isolating switch is one of the most used equipment in substations, and its failure rate also ranks first. The main reason is that the transmission link of the outdoor isolating switch is directly exposed to the atmosphere and is exposed to the sun and rain, and the operating frequency is low at ordinary times. The transmission parts such as shaft pins and bearings lack lubrication and relative movement, so the operation is often jammed. At present, the state detection methods of high-voltage disconnectors mainly rely on infrared, contact resistance, and ultrasound, but there is no effective monitoring method for mechanical faults. The mechanical failure of the isolating switch cannot be diagnosed and dealt with ea...

AI Technical Summary

Problems solved by technology

The mechanical failure of the isolating switch cannot be diagnosed and dealt with early, and it is often in a passive situation of "not knowing if it is not broken, not repairing if it is not broken, and it is too late if it is broken", resulting in frequent "non-stop" accidents caused by mechanical jamming of the isolating switch

[0003] Since the existing torque sensor is installed in the transmission link of the outdoor isolating switch and is directly exposed to the sun and rain in the atmosphere, it is easy to be damaged. Therefore, the piezoelectric film is used to obtain the electrical signal of the main shaft, and then it is measured by converting it into a torque value. , but when the torque is measured on site, the main shaft of the motor mechanism of each high-voltage disconnector is different, so it needs to be calibrated on site

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