Pneumatic flexible shield electrode

Abstract

The invention provides a pneumatic flexible shield electrode. The pneumatic flexible shield electrode comprises a diaphragm type compression cylinder, and a piece of conductive rubber which covers the diaphragm type pressure cylinder, wherein the diaphragm type compression cylinder and the conductive rubber are located in a metal shield cover, the diaphragm type compression cylinder is used to apply pressure on the conductive rubber through a pneumatic mode, the conductive rubber is tightly attached to a measured wire bar and conducts electricity under the circumstance that the diaphragm type compression cylinder applies the pressure on the conductive rubber, and the metal shield cover is used to fix the diaphragm type compression cylinder and shield external disturbance. Due to the fact that the conductive rubber is used as a flexible electrode, the pneumatic flexible shield electrode is good in electrical conductivity and strong in compressibility, and can be fully and tightly attached to an insulated surface of the measured wire bar under action of air pressure, and can shield the eternal measurement interference to a micro current in a measurement link by using the metal shield cover. The pneumatic flexible shielding electrode has the advantages of being simple in structure, convenient to install and dismantle, and easy to popularize and use.

Description

technical field [0001] The invention relates to the technical field of generator water leakage detection, in particular to a pneumatic flexible shielding electrode. Background technique [0002] Stator water leakage is a common problem in water-cooled generators, and it is one of the common faults that threaten the safe operation of the unit. Once the stator leaks, it will often cause serious consequences, ranging from shutting down the unit, to causing a short-circuit accident of the generator, or even burning the generator. Quality problems or poor bending process, long-term electromagnetic force, cold and heat stress, and chemical erosion of internal cooling water may cause cracks on the hollow strands and cause water leakage; poor welding, "weld corrosion", water pipes Poor quality, non-standard installation process, and water pipe wear caused by vibration at the end of the winding will also cause water leakage at the water and electricity joints. The water and electri...

AI Technical Summary

Problems solved by technology

[0009] In the actual test of the spring shielding electrode, due to the influence of human body contact (without insulating gloves), interference will be introduced. Although the contact surface of the copper foil is coated with conductive paint, the flexibility and uniformity of pressure after the paint is cured are still not good. The insulation surface of the tested wire rod is sufficiently close, but the electrode still has the problem of easily causing large dispersion of test data

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