Inter-couple insulation state monitoring device and method using voltage measurement to obtain insulation isopleth

Abstract

The invention provides an inter-couple insulation state monitoring device using voltage measurement to obtain an insulation isopleths; the monitoring device is connected with a to-be-monitored dissimilar metal couple structure, and comprises the following units: a processing unit; a first controlled resistor unit with measuring resistance modules having different resistance values Rxi and connected between a first metal element and a second metal element in order; a measuring unit detecting voltage values Vi corresponding to each resistance value Rxi, wherein the processing unti obtains an actual measurement insulation isopleth, compares the actual measurement insulation isopleth with an alarm insulation isopleths, and determines the insulation state. In addition, the invention also provides the corresponding monitoring method. The method and device can monitor the insulation state of the dissimilar metal couple structure, can provide maintenance and replacement evidences for the inter-couple insulation material, and can be combined with the dissimilar metal inter-couple electric insulation technology, thus effectively reducing and preventing the dissimilar metal couple structure electrochemical corrosions.

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 dissimilar metal insulating materials, especially long-term monitoring, and the monitoring of slow aging damage to insulation failure of insulating materials in seawater medium, the method of direct potential monitoring can measure and record potential difference data. However, 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 direct potential monitoring method and AC resistance monitoring method, it is impossible to effectively monitor the state and judge the insulation performance of dissimilar intermetallic insulating materials.

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