126kv breaker arc extinguish chamber centring frock

Abstract

The invention relates to a 126kV breaker arc extinguish chamber centring frock comprising a stander and a centring platform arranged on the stander. The 126kV breaker arc extinguish chamber centring frock also comprises a fixed fixture table and a movable fixture table, wherein the inner side of the fixed fixture table is provided with a ladder type round table; a clamping mechanism is installed on the fixed fixture table at both sides of the round table; the movable fixture table is installed at the other end of the centring platform to be arranged relative to the fixed fixture table; the bottom of the movable fixture table is in a sliding fit with a linear guide track horizontally arranged on the centring platform; the inner side of the movable fixture table is provided with the round table; the center of the round table of the movable fixture table is provided with a stationary contact seat clamping mechanism; and a central axis of the round table of the fixed fixture table is coincident with the central axis of the round table of the movable fixture table. When the 126kV breaker arc extinguish chamber centring frock is used for centring, a breaker arc extinguish chamber support seat is coincident with the axis of the round table of the fixed fixture table and a breaker arc extinguish chamber stationary contact seat is coincident with the central axis of the round table of the movable fixture table so that the breaker arc extinguish chamber stationary contact seat is coincident with the axis of a support seat, therefore, the requirement of axiality of a movable contact and a stationary contact is ensured.

Description

technical field [0001] The invention relates to a tool, in particular to a transverse centering tool for installing an arc extinguishing chamber of a 126kV circuit breaker. Background technique [0002] High-voltage circuit breakers are electrical equipment for control and protection in power systems. When the body is assembled, international and domestic manufacturers generally adopt manual docking and free centering to ensure that the dynamic and static contacts of the circuit breaker body are in the centered state. This docking method has high requirements for workers. Due to the poor stability of manual operation, Therefore, there are often situations where the alignment does not meet the requirements. [0003] When the alignment is unqualified, if the deviation is small, the influence on the main circuit resistance is not obvious, and the influence on the characteristics of the circuit breaker can be realized by adjusting the opening and closing spring, but if the adju...

AI Technical Summary

Problems solved by technology

When the body is assembled, international and domestic manufacturers generally adopt manual docking and free centering to ensure that the dynamic and static contacts of the circuit breaker body are in the centered state. This docking method has high requirements for workers. Due to the poor stability of manual operation, Therefore, there are often situations where the alignment does not meet the requirements.

[0003] When the alignment is unqualified, if the deviation is small, the influence on the main circuit resistance is not obvious, and the influence on the characteristics of the circuit breaker can be realized by adjusting the opening and closing spring, but if the adjustment of the opening and closing spring is large, the long-term After running for a long time, the spring is very prone to fatigue, which makes it difficult to open and close the product smoothly, resulting in product failure, and the risk of product explosion due to failure to open and close.

If the deviation is large, it will have a significant impact on the resistance of the main circuit. If it is not found at the factory, the contact part will heat up when the product encounters a short-circuit current after operation, and it will be burned after overheating, and the product may explode. In addition, the deviation of the centering accuracy is large In some cases, it is difficult to adjust the opening and closing spring to meet the technical requirements of the mechanical characteristics of the product. This requires disassembling the unqualified product body, re-centering and replacing related damaged parts, so that the pair The medium precision meets the requirement

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