Waterproof structure of dry-type transformer

Abstract

The invention discloses a waterproof structure of a dry-type transformer. The waterproof structure comprises a transformer outer tank, wherein a top cooling hole is formed in the top of the transformer outer tank; the inside of the top cooling hole is connected with a rotating shaft; a rotating ring is arranged at the outer side of the rotating shaft; the outer side of the rotating ring is connected with a shutter; an expansion board and an expansion slot are arranged in the shutter; a waterproof cover is arranged at the outer side of the transformer outer tank and comprises an inner plate and an outer plate; the inner plate is arranged in the transformer outer tank; side cooling holes are formed in the surface of the outer plate; the outer sides of the side cooling holes are connected with waterproof sheets; a buffer groove is formed in the bottom end of the outer plate; the inside of the buffer groove is connected with a support plate; a sleeve plate is arranged at the outer side of the support plate; a spring is arranged in the sleeve plate; and the outer side of the sleeve plate is connected with a two-way baffle plate. The heat dissipation efficiency is improved through the top cooling hole and the side cooling holes; top shielding is increased through the expansion board; a sealing gasket is used for preventing water from entering through the edge of the inner plate; the waterproof sheets are capable of preventing rainwater from flowing into the device; and the two-way baffle plate is used for draining top rainwater and also is capable of preventing bottom running water from flowing into the side cooling holes.

Description

technical field [0001] The invention relates to the technical field of waterproof mechanisms, in particular to a waterproof mechanism for dry-type transformers. Background technique [0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC mechanical equipment and other places. Simply put, dry-type transformers refer to transformers whose iron core and windings are not immersed in insulating oil. The cooling method is divided into natural air cooling ( AN) and forced air cooling (AF), when natural air cooling, the transformer can run continuously at the rated capacity for a long time, when forced air cooling, the output capacity of the transformer can be increased by 50%, suitable for intermittent overload operation, or emergency accident overload Operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operating state, so it should not be in continuous overload operation...

AI Technical Summary

Problems solved by technology

[0003] At present, the waterproof mechanism of dry-type transformers widely used in us has a single structure. Generally, it is only a protective shell to isolate moisture. However, this design is not conducive to the loss of heat generated by work, which will affect the transformer. The working efficiency of some waterproof mechanisms is only considered in the design of the top of the water or the flow of atmospheric precipitation, the consideration is not very perfect, resulting in the waterproof effect is not very good

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