On-line detection device for mechanical characteristics

Abstract

The invention relates to a mechanical property on-line detecting device which comprises an operation insulator, a linkage mechanism, a first displacement sensor and a second displacement sensor. The operation insulator is fixedly connected with a moving conducting rod at the bottom of a vacuum arc-extinguishing chamber. One end of the first displacement sensor is fixed at the bottom of the operation insulator. The other end of the first displacement sensor is fixed on the linkage mechanism. The second displacement sensor is fixed at one end of the connection portion of the linkage mechanism and the first displacement sensor. The first displacement sensor is used for converting displacement changing between the operation insulator and the linkage mechanism into electric quantity to be output, by changing of an electric quantity output value, a just-closing point and a just-separating point of a moving contact and a static contact in the vacuum arc-extinguishing chamber are obtained, accordingly, the abrasion degrees of the moving contact and the static contact are known, meanwhile, by working of the second displacement sensor, the total stroke of a primary loop is found and is used as a reference point, therefore, on-line detecting of the mechanical property of the vacuum arc-extinguishing chamber is completed, and the reliability of the detecting device is improved.

Description

technical field [0001] The invention relates to an on-line detection device for mechanical characteristics used for on-line detection of mechanical characteristics of a vacuum interrupter. Background technique [0002] Vacuum interrupter, also known as vacuum switch tube, is the core component of medium and high voltage power switch. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off through the excellent insulation of the vacuum inside the tube, so as to avoid accidents and Accidents happen. Before the vacuum interrupter is put into use, it is usually necessary to test its mechanical characteristics. At present, the commonly used detection method is to connect the movable conductive rod of the vacuum interrupter with a sliding rheostat, and the movable conductive rod of the vacuum interrupter The movement of the sliding rheostat will change the resistance value of the sliding rheostat, thereby ob...

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Problems solved by technology

Before the vacuum interrupter is put into use, it is usually necessary to test its mechanical characteristics. At present, the commonly used detection method is to connect the movable conductive rod of the vacuum interrupter with a sliding rheostat, and the movable conductive rod of the vacuum interrupter The movement of the sliding rheostat will change the resistance value of the sliding rheostat, thereby obtaining the working value of the vacuum interrupter, but since the sliding rheostat is contact type, there will be a certain degree of wear and tear during the detection process, which will affect the service life of the detection device; in addition, The above methods cannot realize online detection of mechanical characteristics, and cannot detect parameters such as speed, opening distance, and overtravel.

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