Replacement device for switching-closing spring of circuit breaker

Abstract

The invention discloses a replacement device for a switching-closing spring of a circuit breaker. The replacement device comprises a screw rod, a nut matched with the screw rod, a handle, a cross beam, spring clamping arms, a limiting block, connecting blocks and connecting rods. The nut is fixed to the center of the cross beam, the two ends of the cross beam are hinged to the upper ends of the connecting blocks respectively, the spring clamping arms are symmetrically fixed to the two sides of the lower ends of the connecting blocks, the handle is fixed to the upper end of the screw rod, the limiting block is fixed to the lower end of the screw rod, the spring clamping arms are hinged to the ends of the corresponding connecting rods respectively, and the other end of each connecting rod is hinged to the limiting block. According to the replacement device, the switching-closing spring of the circuit breaker is fixed by the two pairs of spring clamping arms, compared with a traditional hook type replacement device for the switching-closing spring of the circuit breaker and a double-clamp type replacement device for the switching-closing spring of the circuit breaker, operation is safer and more reliable; an integrated structural design is adopted, so that the structure is reasonable, and use is convenient; due to the fact that the limiting block is arranged at the lower end of the screw rod, it can be avoided that the screw rod is rotated too much.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a switching device for opening and closing springs of circuit breakers. Background technique [0002] At present, DW40, DW45, DZ40 and VW60 series of molded case low-voltage circuit breakers widely used in power systems all use closing springs to complete the breaking and fast reclosing operations of the circuit breaker. As the operating life of the circuit breaker increases, it will gradually appear If the closing speed does not meet the requirements, the closing spring needs to be replaced at this time. [0003] Because the closing spring of the above-mentioned circuit breaker is relatively thick and has a very large elastic force, it is very inconvenient to replace. Existing 200620084201.5 patent circuit breaker pick-up tool, owing to use hook pick-up spring, once hook comes off, not only can damage circuit breaker, also can injure operator. The existing 201120354367.5 ...

AI Technical Summary

Problems solved by technology

The existing 201120354367.5 patent circuit breaker spring dismounting tool uses spring clamps to disassemble and assemble springs, but since only two clamps are used to fix the springs, there are still safety hazards such as spring slipping when replacing relatively thick springs

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