Forming mold of indoor mutual inductor and pouring sealing method of forming mold

Abstract

The invention discloses a forming mold of an indoor mutual inductor and a pouring sealing method of the forming mold. The forming mold comprises an upper mold and a lower mold which defines a mold die cavity, wherein the upper mold is provided with a pouring hole and an exhaust hole which are communicated with the mold die cavity; a mold core is arranged in the mold die cavity, the upper end of the mold core is in the shape of Chinese character 'tu', the lower end of the mold core is in a crossed shape, and the part, positioned in the mold die cavity, of the mold core is cylindrical; a group of insulating supporting columns for supporting a mutual inductor coil is arranged around the mold core in the mold die cavity and is movably connected with the lower mold; the upper end of each insulating supporting column is provided with a step-shaped buckling platform for being buckled with the lower edge of the mutual inductor coil; and a wire outlet hole is formed in a connection position between the upper mold and the lower mold. The forming mold disclosed by the invention has the advantages that the resin pouring sealing efficiency of the indoor mutual inductor can be improved, the unit energy consumption and the rejection rate of the indoor mutual inductor are reduced, the insulating degree of the indoor mutual inductor is improved, and the indoor mutual inductor can be prevented from threatening personal safety when being broken down by high voltage.

Description

technical field [0001] The invention belongs to the technical field of manufacturing an indoor transformer, and in particular relates to a molding die for an indoor transformer and a casting and sealing method thereof. Background technique [0002] 10 kV castable current transformers are widely used in power equipment such as switch cabinets. At present, indoor 10 kV transformers are usually completed after two or more times of resin casting and sealing. Such two or more castings The results of the solid sealing method are: many pouring or injection molds are invested; the workload and intensity of work are large; the energy consumption per unit of the finished product is high; the man-hours of the finished product manufacturing unit are many; The partial discharge exceeds the standard; the joint parts of the 2 or more castings are not firmly bonded, and gaps appear, causing the joint parts to crack and reduce the insulation degree, which often causes the transformer to be b...

AI Technical Summary

Problems solved by technology

[0002] 10 kV castable current transformers are widely used in power equipment such as switch cabinets. At present, indoor 10 kV transformers are usually completed after two or more times of resin casting and sealing. Such two or more castings The results of the solid sealing method are: many pouring or injection molds are invested; the workload and intensity of work are large; the energy consumption per unit of the finished product is high; the man-hours of the finished product manufacturing unit are many; The partial discharge exceeds the standard; the joint parts of the 2 or more castings are not firmly bonded, and gaps appear, causing the joint parts to crack and reduce the insulation degree, which often causes the transformer to be broken down, causing damage to the secondary equipment connected to the transformer and endangering personal safety. create a threat

This needs to address the problems caused by the multiple casting and sealing of the original outdoor 10 kV transformer, and improve the resin casting and sealing method of the transformer in the production process to improve production efficiency and reduce the unit energy consumption and waste products of the product rate, improve its insulation degree, and prevent indoor transformers from being broken down due to high voltage, posing a threat to personal safety

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