Moving contact group for disconnecting switch

Abstract

The invention discloses a moving contact group for a disconnecting switch. The moving contact group for the disconnecting switch comprises a contact bracket, moving contacts, inner end caps, spiral springs and outer end caps, wherein multiple groups of holes are formed in the middle part of the contact bracket, each group of holes is composed of an upper setting hole and a lower setting hole, outer end holes communicated with the upper and lower setting holes are formed on the top and bottom of the contact bracket, a moving contact mounting hole is inwards formed in the middle part of the bottom of each upper setting hole and the middle part of the top of each lower setting hole respectively, one moving contact is arranged in each moving contact mounting hole, the inner end cap takes the shape of a round cover, each inner cover cap is arranged at the position in the upper setting hole or lower setting hole adjacent to the moving contacts in a manner that the opening of the inner cover cap faces outwards, and the spiral spring and outer end cap are respectively arranged in the upper and lower setting holes on the outer side of each inner end cap. In the moving contact group provided by the invention, the moving contacts apply clamp force to fixed contacts by the spiral springs, and the spiral spring is simple in processing technology and low in cost. The pressure of the contact is easy to control, so that accidents can be prevented.

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. 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 contact group mainly includes a contact bracket 1, a...

AI Technical Summary

Problems solved by technology

However, there are the 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 since the commonly used contact spring 3 is a 65Mn steel strip, the production method is to divide the steel strip into strips, fall off, stamp, and carry out after shaping. Heat treatment, 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 the complex processing technology, such as the heat treatment process, if the treatment is not good, the quality of the produced products will be different, so the pass rate and service life of the product are low, and the inspection requirements are high. , once the detection is not strict, the defective contact spring 3 is easy to break, and at this time, the isolating switch will have a phase-open fault, which will increase the voltage of the remaining phases, and burn the lower-level electrical equipment if it is light, or burn it if it is serious. cause fire and other unforeseen consequences

Images