Outgoing line sealing structure of transformer oil pump

Abstract

The invention provides an outgoing line sealing structure of a transformer oil pump, belongs to the technical field of transformer oil pump sealing and solves the problem of an existing transformer oil pump that the sealing effect is poor. The outgoing line sealing structure of the transformer oil pump is characterized in that the transformer oil pump comprises pump body, a wiring hole is formed in the pump body, an external positioning block is arranged at the outer side of the pump body, and an internal positioning block is arranged at the inner side of the pump body; the internal positioning block, the external positioning block, a conductive rod and the pump body are fixedly connected with a fastener, a first sealing ring is arranged between the external positioning block and the pump body, and a second sealing ring is arranged between the external positioning block and the conductive rod; an inner end, arranged in the pump body, of the conductive rod is connected with a lead-out line; and the part, close to the inner end of the conductive rod, in the pump body is filled with a pouring sealant, the pouring sealant enables the lead-out line connected with the inner end of the conductive rod to be fixed in the pump body, and the pouring sealant blocks the gaps among the pump body, the internal positioning block, the conductive rod and the lead-out line. The outgoing line sealing structure improves the sealing effect and the safety performance of the transformer oil pump.

Description

technical field [0001] The invention belongs to the technical field of transformer oil pump sealing, and relates to an outlet sealing structure of a transformer oil pump. Background technique [0002] Transformer oil pump is a fully sealed pump used for forced oil circulation in transformers. Transformer oil pumps have high requirements for sealing. [0003] At present, the commonly used method for sealing the lead wires of transformer oil pumps is to use terminal boards to isolate them. For the existing transformer oil pump terminal boards, for example, Chinese patent literature discloses electric locomotive transformer oil pump terminal boards [application number: 201320389775.3; authorized announcement number: CN203348135U], it comprises metal terminal, upper metal part, pressure-resistant ceramic body, lower metal part and metal terminal board; Metal terminal board is provided with connection hole, and pressure-resistant ceramic body is inserted in the connection hole, a...

AI Technical Summary

Problems solved by technology

[0004] The terminal board of this structure is against the pump body, and an O-shaped sealing groove is arranged on the bottom surface of the terminal board, and an O-shaped sealing ring is installed in the O-shaped sealing groove. The sealing ring plays a sealing role, the sealing effect is poor, and there is a risk of oil leakage; and after the transformer oil pump motor lead wire is connected to the terminal, the motor lead wire is not fixed, and there will be problems between the lead wire and the lead wire or between the lead wire and the casing. Due to the close distance or contact between them, the insulation resistance is too low, which has certain potential safety hazards.

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