Crank arm box seal ring assembly clamp

Abstract

The invention relates to a crank arm box seal ring assembly clamp which comprises a screw rod and a flange plate; the flange plate is arranged in the middle of a connecting sleeve; an external thread is arranged on the outer surface of the upper part of the connecting sleeve; a tapered through hole is formed in the connecting sleeve; the diameter of the tapered through hole is larger in upper part and smaller in lower part; a thread bushing is connected with the external thread at the upper part of the connecting sleeve; a screw rod connecting sleeve is arranged at the upper end of the thread bushing; an inner thread through hole in threaded connection with the screw rod is formed in the screw rod connecting sleeve; the screw rod is in threaded connection to the interior of the screw rod connecting sleeve; the lower end of the screw rod passes through the thread bushing; the lower end of the screw rod is connected with a pressing plate capable of passing through the least diameter end of the tapered through hole through a bearing. The invention aims to provide the crank arm box seal ring assembly clamp which has a simple structure, is convenient to assemble, can prevent abrasion or deflection of a framework seal ring in the assembly process, and ensures the assembly accuracy of the framework seal ring; besides, the assembly qualified rate is improved effectively, and the dynamic seal requirement is met.

Description

technical field [0001] The invention belongs to the field of assembling tools for a crank box, and in particular relates to a jig for assembling a sealing ring of a crank box. Background technique [0002] SF6 circuit breakers have been widely used in power systems, such as the common LW36-126 self-energy SF6 circuit breakers. Now many of them have reached the maintenance period. During the maintenance, it is necessary to disassemble the SF6 circuit breaker and replace the phase column. Arc extinguishing parts, the function of the crank box under the phase column of the circuit breaker is to transmit the output action of the operating mechanism from the outside to the insulating pull rod inside the phase column, and finally to the moving part unit of the arc extinguishing chamber to complete the circuit breaker. Opening and closing action. The crank box is fitted with a self-sealing valve for connection to the inflation line in the base. When the inflatable tube is not con...

AI Technical Summary

Problems solved by technology

But there are following defects in this utility model: the one, when assembling, sealing gasket is placed on the step of the bottom of pressing block, pushes pressing block downwards by transmission rod, and pressing block moves downward under force, and sealing gasket is pressed into In the gasket installation hole of the isolating switch crank box, since the gasket is set on the pressing block, only the middle part of the gasket is stressed, resulting in uneven force on the gasket as a whole, and it is easy to make the edge of the gasket upturned, causing Deformation affects the sealing effect; second, because the compression block and the transmission rod are two separate parts, during the movement of the transmission rod, the contact point between the transmission rod and the compression block is prone to shift, which affects the sealing effect of the compression block. The third is that when the compression block is put into the gasket installation hole of the crank arm box, the compression block is prone to skew in the hole, and the movement of the compression block needs to be adjusted, which reduces the work efficiency.

There is a large difference in the structure and sealing performance of the combined isolating switch arm box of the disclosed patent and the arm box in the SF6 circuit breaker. The structures of the rings are different. If the sealing ring installation tool in the disclosed patent is used to install the sealing ring of the crank box in the SF6 circuit breaker, the sealing ring of the crank box in the SF6 circuit breaker will not be installed in place or cannot be installed. , and even damage the sealing ring

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