System and method for fault diagnosis and fault positioning of plurality of metal couple insulation structures

Abstract

The invention discloses a system for the fault diagnosis and the fault positioning of a plurality of metal couple insulation structures. The system is configured to be connected with a plurality of heterogeneous metal couple structures which are connected together in series. Each heterogeneous metal couple structure comprises a first metal element, a second metal element connected with the first metal element, and an insulator arranged between the first metal element and the second metal element. The first metal element and the second metal element are made of different metals respectively. The system comprises a control and processing unit, a combined measurement input unit connected with the control and processing unit, and a combined measurement unit connected with the control and processing unit. The combined measurement input unit comprises a plurality of sub-units which are in one-to-one correspondence with the plurality of heterogeneous metal couple structures. The invention further discloses a method for the fault positioning of a plurality of metal couple insulation structures.

Description

technical field [0001] The present invention relates to a system and method, in particular to a system and method for diagnosing and locating galvanic insulation faults. 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 structures are usually installed between fastening joints of dissimilar metal materials in ship hulls, valves, piping and other equipment structures to isolate them. This technology is an effective method to prevent and reduce electrochemical corrosion between dissimilar metals, and can isolate galvanic currents. , to reduce and avoid the electrochemical corrosion between metals, so it has been paid more and more attention in the...

AI Technical Summary

Problems solved by technology

Especially when the insulation of one of the galvanic structures is damaged, it may seriously affect the equivalent galvanic characteristics of other galvanic structures in the same system, such as greatly increasing or reducing the voltage of the galvanic structure in the same system, changing its equivalent The internal resistance of the primary cell, even changing the polarity of the equivalent primary cell of the adjacent galvanic couple structure

Therefore, if the external characteristic parameters such as voltage, internal resistance, and output current are measured and analyzed according to the law of a single galvanic couple structure, it is very likely that the faulty galvanic couple structure will be misjudged.

In addition, in actual engineering, for seawater pipelines, especially for important equipment such as large-scale pipelines, pumps, and valves, misjudgment of the faulty galvanic structure may lead to the wrong disassembly and replacement of the insulation structure of the seawater pipeline system, resulting in manpower Serious loss of material resources and construction period

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