Monitoring device and monitoring method for inter-couple insulating state

Abstract

The invention provides a monitoring device for an inter-couple insulating state. The monitoring device is connected to a to-be-monitored dissimilar metal couple structure. The monitoring device comprises a switching unit, a detecting unit and a processing unit. The switching unit enables detecting resistors to be separately connected between a first metal component and a second metal component in a switching manner; the detecting unit detects the current of the detecting resistors; the processing unit receives the current values, acquires an equal insulating value curve according to resistance values and the current valves of the corresponding detecting resistors, compares the equal insulating value curve with a predetermined critical equal insulating value curve and judges the insulating state between the first metal component and the second metal component according to the comparison result. The invention also provides a corresponding monitoring method. According to the device and the method provided by the invention, the insulating state of the dissimilar metal couple structure can be monitored so as to provide a ground for maintenance and exchange of an inter-couple insulating material. By combined use with a dissimilar metal couple inter-couple insulating process, the electrochemical corrosion of the dissimilar metal couple structure can be effectively reduced and prevented.

Description

technical field [0001] The invention relates to a monitoring device and method for insulation state, in particular to a monitoring device and method for insulation state between galvanic couples. Background technique [0002] Dissimilar metal connection parts of ship equipment and piping systems, such as copper valves are fixedly connected to the steel hull through flanges and bolts, and form a galvanic structure under the action of electrolytes such as seawater, forming a galvanic current in the case of direct connection , resulting in electrochemical corrosion. Insulation materials are usually used to isolate the fastening joints of dissimilar metal materials in ship hulls, valves, piping and other equipment structures. This technology was originally used for electric field protection of ships. In practice, this technology is also used to prevent and An effective method to reduce the electrochemical corrosion between dissimilar metals can isolate the galvanic current, red...

AI Technical Summary

Problems solved by technology

Practice has proved that the monitoring of the insulation state of insulating materials between dissimilar metals, especially long-term monitoring, and the monitoring of slow aging damage to insulation failure of insulating materials in seawater medium, the method of potential monitoring can measure and record the change of potential difference data trend, but it is difficult to obtain accurate criteria because the data is too broad; and due to the effect of seawater medium, the AC resistance monitoring method cannot accurately measure the resistance of insulating materials

Due to the above defects, only relying on the existing potential monitoring method and AC resistance monitoring method, it is impossible to effectively monitor the state and judge the insulation performance of insulating materials between dissimilar metals

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