Tool for replacing tulip contact of breaker

Abstract

The invention provides a tool for changing a tulip contact of a breaker. The tool comprises a transmission connecting rod, a sliding block, an expanding piece and a supporting piece, wherein a transmission fit part is formed at one end of the transmission connecting rod, and a fixed base is formed in the middle of the transmission connecting rod; the sliding block is mounted on the transmission fit part and can move back and forth on the transmission fit part in the axial direction; the expanding piece is mounted on the sliding block and positioned between the sliding block and the fixed base, and can move back and forth on the sliding block in the radial direction; one end of the supporting piece is movably connected with the outer wall of the fixed base, and the other end of the supporting piece is articulated with the expanding piece and forms rotation fit with the central shaft of the transmission rod around the central shaft; when the sliding block moves in the direction towards or far from the fixed base, the supporting piece rotates around the central shaft of the transmission connecting rod in the direction far from or towards the sliding block, so that the expanding piece is expanded outward or contracted inward. By adopting the tool, one-man operation is only required, the structure is simple, the tool is convenient to operate, operating time and manpower are reduced, and the damage risk of the tulip contact of the breaker is reduced, so that the potential safety hazard of a 10kV switch cabinet of a transforming plant is reduced.

Description

technical field [0001] The invention relates to the technical field of circuit breaker maintenance, in particular to a tool for replacing a plum blossom contact of a circuit breaker. Background technique [0002] Circuit breakers are widely used in power systems, especially removable trolley circuit breakers, which are used in 10kV switchgear in substations, which realize current conduction through push-pull contact between dynamic and static contacts. With the increase of the service life of the trolley circuit breaker and the continuous increase of the power load of the power grid, under high load conditions, the plum blossom contacts of the trolley circuit breaker may generate heat due to poor contact. If not handled in time, it will cause the trolley The spring clamping force of the plum blossom contact of the circuit breaker continued to decrease, which increased the contact resistance of the dynamic and static contacts on the trolley circuit breaker, which caused the p...

AI Technical Summary

Problems solved by technology

With the increase of the service life of the trolley circuit breaker and the continuous increase of the power load of the power grid, under high load conditions, the plum blossom contacts of the trolley circuit breaker may generate heat due to poor contact. If not handled in time, it will cause the trolley The spring clamping force of the plum blossom contact of the circuit breaker continued to decrease, which increased the contact resistance of the dynamic and static contacts on the trolley circuit breaker, which caused the plum blossom contact of the trolley circuit breaker to overheat and burn out, and even caused an explosion in the 10kV switchgear of the substation

[0003] In order to avoid the occurrence of the above-mentioned dangerous situation, it is necessary to repair and replace the plum blossom contacts of the trolley circuit breaker in time. In the prior art, the method of replacing the plum blossom contacts of the trolley circuit breaker is to use common maintenance tools such as screwdrivers and rubber pliers to disassemble and assemble them. The disadvantages of the contact and its accessories are: (1) Since there are four fastening springs on the plum blossom contact of the trolley circuit breaker, it is difficult to operate by one person during the disassembly process, and at least two maintenance personnel are required to cooperate ; (2) Due to the high tightness required between the plum blossom contact of the trolley circuit breaker and the fastening spring, it takes a long time to disassemble; (3) During the replacement process of the plum blossom contact of the trolley circuit breaker, it is necessary to replace the The fastening spring is pried open, which will easily cause displacement, deformation or damage of the plum blossom contact fastening spring, contact finger and conductive arm of the trolley circuit breaker, which will cause certain safety hazards in the operation of the 10kV switchgear of the substation

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