Dismounting method of energy storage spring for 10 kV metalclad withdraw switchgear circuit breaker

Abstract

The invention provides a dismounting method of an energy storage spring for a 10 kV metalclad withdraw switchgear circuit breaker. The method is implemented with a special tool. The special tool includes a body, a driving assembly mounted on the body, two sets of clamping stretching-contracting assemblies drivingly connected to the driving assembly and an auxiliary stretching-contracting assemblywhich is drivingly connected to the driving assembly and pinned to the two sets of the clamping stretching -contracting assemblies. The dismounting method includes cutting off a power supply of the circuit breaker, removing a handcart air plug of the circuit breaker, manually opening and closing a switch to release energy of the circuit breaker mechanism, adjusting the special tool to a ready state, holding and stretching the energy storage spring by using the special tool, dismounting a connecting lever fixing nut and removing a rotating connecting lever when the stretching length of the energy storage spring facilitates the removal of the rotating connecting lever arranged on the lower end of the energy storage spring, removing the energy storage spring for maintenance and the like. Thedismounting method of the energy storage spring for the 10 kV metalclad withdraw switchgear circuit breaker can be suitable for the dismounting of conventional various types of energy storage springs,is strong in applicability and convenient in operation, and improves the work efficiency.

Description

technical field [0001] The invention relates to a method for disassembling and assembling an energy storage spring of a 10kV central cabinet circuit breaker. Background technique [0002] The 10kV central cabinet circuit breaker generally adopts a spring energy storage mechanism. At present, there are common models such as Senyuan VS1, Pawell WEP, General VB2, and Dongyuan VED4. There are generally two types of energy storage spring structures and installation forms used in existing common central cabinet circuit breakers. One is a bare spring, and the hook-shaped structures at both ends of the spring or the mounting holes are directly connected to the circuit breaker mechanism; the other is The two ends of the spring are installed in the ferrule, and then connected with the circuit breaker mechanism through the hook or mounting hole of the ferrule itself. When the internal components of the circuit breaker (such as closing coil, energy storage motor or internal transmissio...

AI Technical Summary

Problems solved by technology

When the internal components of the circuit breaker (such as closing coil, energy storage motor or internal transmission connecting rod, etc.) break down and need to be repaired and replaced, the energy storage spring must be released and removed before the next step can be targeted to remove the faulty components; energy storage Even if the spring is in the energy-releasing state, it is actually a pre-stretched state, which has a lot of energy and is not easy to disassemble; when reassembling, it is necessary to stretch the energy-storing spring for a certain distance before installing the shaft pin, stretching it by hand Energy storage spring can't do it

For this reason, many researches have been done on tools and tools used for auxiliary disassembly and assembly of circuit breaker energy storage springs. For example, the Chinese patent document with the authorized announcement number CN202656147U discloses a scissors-type vacuum circuit breaker spring disassembly tool. The structure is similar to that of scissor blades. When using this tool to disassemble the energy storage spring, clamp the energy storage spring removal tool on the energy storage spring on the spring operating mechanism of the vacuum circuit breaker, and then rotate the handle to move the clamping frame downward. , so that the handles of the dismounting tool move toward each other until the blade-shaped part of the lower part of the handle is embedded in the gap of the spring, so that the energy storage spring is pushed to both ends to overcome the pre-tension force of the energy storage spring, so that the energy storage The spring is extended, the device can complete the effect of clamping the spring by turning the handle, but the effect is not too obvious when the spring is stretched to both sides, and it is more laborious to use

Another example is that the Chinese patent literature with the authorized announcement number CN207522519U discloses a vacuum circuit breaker energy storage spring disassembly and maintenance tool. Its hooked part is put into the spring, and its use has obvious limitations

Another example is that the Chinese patent literature with the authorized announcement number CN207344505U discloses a switchgear circuit breaker energy storage spring disassembler. However, the two ends of the dismantled target spring of this device must be provided with a force-bearing position that can fix its clamping plate. However, the switch The energy storage springs in cabinet circuit breakers are generally bare springs and have no stress points, so their applicability is greatly limited

[0003] As can be seen from the above, the disassembly and assembly method implemented by the disassembly and assembly tool for the energy storage spring of the circuit breaker circuit breaker in the prior art is generally only for a specific type or type of energy storage spring, but the central installation used in the power grid The design structure and actual layout of the cabinet circuit breaker energy storage spring are different for each manufacturer, and the size and size of the energy storage spring used are also different. Auxiliary disassembly and assembly of energy storage spring of circuit breaker for model and structure

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