A welding fixture for double-layer pressure equalizing rings

Abstract

The invention provides a welding clamp with double layers of grading rings. The welding clamp with double layers of grading rings can effectively ensure that the upper layer of grading rings and the lower layer of grading rings share the same axle center and are not affected by cooling shrinkage after welding. The welding clamp with double layers of grading rings comprises a base seat, a top seat and a plurality of guide pillars, wherein the top seat is movably connected above the base seat through the plurality of guide pillars. The welding clamp further comprises at least two pairs of staggered upper clamp forceps components and at least two pairs of staggered lower clamp forceps components, wherein each upper clamp forceps component comprises an upper walking component arranged inside the top seat and an L-shaped upper forceps arm fixedly connected below the upper walking component, an upper forceps arm driving device fixedly connected on the bottom surface of the top seat is arranged between a pair of the L-shaped upper forceps arms, a lower forceps arm driving device fixedly connected on the top surface of the base seat is arranged between a pair of L-shaped lower forceps arms, and the center of the upper forceps arm driving device is consistent with the center of the lower forceps arm driving device. The welding clamp with double layers of grading rings avoids cooling shrinkage deformation when a welding point changes from high temperature to low temperature.

Description

technical field [0001] The invention relates to the field of clamps, in particular to the improvement of clamps used in the welding of double-layer pressure equalizing rings. Background technique [0002] The voltage equalizing ring can evenly distribute the high voltage around the object to ensure that there is no potential difference between the various parts of the ring, so as to achieve the effect of voltage equalization. According to different purposes, it can be divided into lightning protection voltage equalizing rings, lightning protection voltage equalizing rings, mutual inductance voltage equalizing rings, high voltage test equipment voltage equalizing rings, power transmission and transformation line voltage equalizing rings, etc. In order to make the pressure equalizing ring more effective, usually two pressure equalizing rings are stacked up and down, and then welded together with several side columns. [0003] However, people found the following problems durin...

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Problems solved by technology

[0003] However, people found the following problems during operation: 1. Because most of the pressure equalizing rings are ring-shaped and large in size, it is difficult to effectively guarantee the coaxiality of the two pressure equalizing rings when they are stacked one above the other, so that the The use effect is greatly reduced; 2. Usually, after a welding process is completed, the welding point is reduced from high temperature to low temperature, which will inevitably lead to cooling shrinkage deformation, and the shrinkage of different welding points is not the same. Therefore, after several side column welding is completed Finally, the coaxiality of the upper and lower pressure equalizing rings will inevitably deviate again, which seriously affects the use effect of the pressure equalizing rings.

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