Isolating switch moving contact group capable of improving contact stability

Abstract

An isolating switch moving contact group capable of improving contact stability comprises a contact bracket, a plurality of moving contacts, a plurality of compression springs, a plurality of baffle plates and a plurality of U-shaped frames. The isolating switch moving contact group capable of improving contact stability, provided by the invention, has the following advantages that the compression springs are used to replace sheet springs so as to more easily obtain stable, controllable and longer spring service life; the U-shaped frames penetrates through the compression springs, and the external circumferences of the compression springs are supported by the contact bracket, so that stability problems caused by uneven stress of the compression springs are solved; each U-shaped frame penetrates through grooves on two sides of the corresponding moving contact to be positioned accurately, so as to solve the problem of malposition caused by the fact that the moving contacts are inclined under the action of capsizing moment during closing; the two ends of each U-shaped frame are fixed by a groove between two middle holes of the corresponding baffle plate, so that the positioning is accurate and the stability of the whole moving contact group is improved.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switchgear, and in particular relates to a movable contact group for an isolating switch capable of improving the stability of the contacts. Background technique [0002] The isolating switch is a high-voltage switchgear that is mainly used to reliably isolate the part that needs to be powered off from the live part in the high-voltage power distribution device, so as to ensure the safety of equipment or line maintenance and conduct electrical isolation. It is mainly composed of a shell, a base, It is composed of static contact group, moving contact group and spring energy storage mechanism. figure 1 It is a three-dimensional view of the structure of the upper movable contact group of a disconnector in the prior art. figure 2 for figure 1 The schematic diagram of the structure of the contact spring on the moving contact group is shown. Such as figure 1 , figure 2 As shown, the moving c...

AI Technical Summary

Problems solved by technology

However, there are following problems in this prior art moving contact group: According to the requirements of the isolating switch, this switch needs to be connected and broken at least 6000 times, that is, the upper and lower moving contacts 2 need to be opened and restored at least The action is 6000 times, so the contact spring 3 must have a very high service life, but because the commonly used contact spring 3 is a 65Mn steel strip, the production method is to divide the steel strip into strips, fall off, punch, and then carry out the shaping. Heat treatment, the heat treatment method is high temperature quenching for 4 hours, then medium temperature tempering for 4 hours

The disadvantages of this material and processing method are: 1. High cost and long time

2. The process is complex and the control requirements are extremely high. Due to its complicated processing technology, such as the heat treatment process, if the process is not handled properly, the quality of the produced products will be different, so the pass rate and service life of the product are low, resulting in contact The stability of the spring 3 is poor, and the inspection requirements are high. Once the inspection is not strict, the defective contact spring 3 is easy to break. In the slightest, it will burn down the lower-level electrical equipment, and in the severest case, it will cause fire and other unpredictable consequences

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