Zinc oxide resistor disc end surface welding agent

Abstract

The invention relates to the field of welding auxiliaries, in particular to a zinc oxide resistor disc end surface welding agent which comprises the following components in parts by weight: 20-30 parts of polyaniline nanofibers, 100-180 parts of an organic solvent, 20-25 parts of conductive inorganic nonmetal filler, 20-25 parts of conductive metal filler, 100-150 parts of thermosetting resin, 10-60 parts of a curing agent and 5-30 parts of an accelerant. By utilizing the synergistic effect between the polyaniline nanofibers and the graphene, the graphene can provide a conductive skeleton for the polyaniline nanofibers, and the polyaniline can improve the stability of the graphene; the thermosetting resin has good processability and is easily mixed with the curing agent, the conductive filler and the like, so that the conductive filler is uniformly distributed in the welding agent and is tightly attached to the surface of an aluminum layer of a resistor disc after being cured, and thus, the aluminum layer of a resistor surface is protected; and the welding agent has the advantages of good conductivity, strong adhesiveness, good chemical stability and better mechanical properties.

Description

technical field [0001] The invention relates to the field of welding aids, in particular to a soldering agent for the end face of a zinc oxide resistance sheet. Background technique [0002] In recent years, due to the continuous development of arrester manufacturing technology, the international standards have higher and higher requirements for the electrical performance of zinc oxide arresters. Zinc oxide resistors are the core components of surge arresters, and the flatness of their end surfaces will directly affect the effective contact surface between zinc oxide resistors, which in turn affects the level of lightning shock resistance and flow capacity of zinc oxide surge arresters. [0003] In the daily testing process of zinc oxide arresters, it is often found that many arresters have flashovers and thermal collapses during residual voltage or high current tests. The location of the network or thermal collapse is at the gap. The gap between the contact surfaces of re...

AI Technical Summary

Problems solved by technology

[0004] Although the existing conductive adhesive can be used to simply realize the seamless connection between the resistors, its stability is poor, and it is difficult to withstand the impact force and heat generated by the arrester during the lightning shock process, and it is not resistant to corrosion and high temperature. , has a fatal impact on the parameters of the arrester, so it cannot be used

Many manufacturers now add conductive metals such as lead skin and corrugated sheets between the zinc oxide resistors to achieve full contact between the sheets, but the deformability of these conductive metals is limited, although it can be reduced by reducing the distance between the contact surfaces of the zinc oxide resistors. The gap further reduces the probability of failure in the normal operation of the zinc oxide arrester, but it cannot fundamentally solve the problem, and the seamless connection of the zinc oxide resistance sheet cannot be realized, and the cost of using conductive metal is relatively high (lead skin is poisonous, and it is strictly prohibited to use in many countries) and A large number of experimental data show that it has a certain influence on the electrical performance of the entire arrester, and the aluminum layer between the contact surfaces of the resistors is easily corroded by moisture