Forming die of outdoor mutual inductor, and casting fixing and sealing method of outdoor mutual inductor

Abstract

The invention discloses a forming die of an outdoor mutual inductor, and a casting fixing and sealing method of the outdoor mutual inductor. The forming die comprises an upper die and a lower die which are used for forming a die cavity, the upper die is provided with a casting hole connected with the die cavity and an air outlet, a die core is arranged in the die cavity, the upper end and the lower end of the die core are connected with the upper die and the lower die respectively, the upper end and the lower end of the die core are jointed into the upper groove of the upper die and the lower groove of the lower die respectively, and the part of the die core positioned in the die cavity is cylindrical in shape; and a group of fixed pillars for supporting mutual inductor coils is arranged in the die cavity surrounding the die core, the fixed pillars are fixedly connected with the lower die, and the upper end of each of the fixed pillars is provided with a stepped clamping platform for jointing the external edge and the lower edge of each of the mutual inductor coils. The forming die and the method improve the resin casting fixing and sealing efficiency of the outdoor mutual inductor, reduce the unit energy consumption and the defective index of the outdoor mutual inductor and improve the insulation degree of the outdoor mutual inductor.

Description

technical field [0001] The invention belongs to the technical field of manufacturing outdoor transformers, and in particular relates to a forming mold of an outdoor 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, outdoor 10 kV transformers are usually divided into two or more times of resin casting and sealing, and then the outdoor 10 kV transformers can only be completed after silicone encapsulation. The result of such two or more pouring and sealing methods is: more pouring or injection molds are invested; the workload and work intensity are large; the energy consumption per unit of the finished product is high; the man-hours of the finished product manufacturing unit are many; Cavitation is prone to occur in the joint part of the first pouring, causing partial discharge to exceed the standard; the joint part of two or more pouring...

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, outdoor 10 kV transformers are usually divided into two or more times of resin casting and sealing, and then the outdoor 10 kV transformers can only be completed after silicone encapsulation. The result of such two or more pouring and sealing methods is: more pouring or injection molds are invested; the workload and work intensity are large; the energy consumption per unit of the finished product is high; the man-hours of the finished product manufacturing unit are many; Cavitation is prone to occur in the joint part of the first pouring, causing partial discharge to exceed the standard; the joint part of two or more pourings is not firmly bonded, and gaps appear, causing cracks in the joint part, resulting in a decrease in the insulation degree, which often causes the transformer to be broken down. Damage to connected secondary equipment and threats to personal safety

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 outdoor transformers from being broken down due to high voltage, posing a threat to personal safety

Images