Lower shell of electric valve, die of lower shell and production process of lower shell

Abstract

The invention relates to a lower shell of an electric valve, a die of the lower shell and a production process of the lower shell. The lower shell comprises a body and a copper sleeve; the copper sleeve is embedded in the body and integrated with the body; continuous and discontinuous protrusions are arranged on the outer side of the copper sleeve in the circumferential direction; a connecting part is arranged at the joint of the body and the copper sleeve and is annular; trapezoid grooves are evenly formed in the connecting part in the circumferential direction; and an air outlet hole is formed between every two adjacent trapezoid grooves. The lower shell of the electric valve is used in the high-end field and manufactured through the aluminum-coated copper process, the conductivity of aluminum-coated copper is higher, electricity transmission is facilitated, better conductivity is achieved, environment pollution is effectively reduced, energy consumption is reduced, the integrated casting structure of the lower shell is more stable and reliable, the low-pressure process is adopted during casting, the internal compactness of the produced lower shell is good, certain heat treatment can be conducted, and therefore better mechanical performance can be obtained.

Description

technical field [0001] The invention relates to the technical field of valve casting, in particular to a lower casing of an electric valve, a mold thereof and a production process thereof. Background technique [0002] Traditional motor casings are generally made of separate materials and high-pressure casting. Nuclear power motors have high requirements and require an integrated structure. Most motors in the prior art are cast from ferrous metals, which cause high environmental pollution and high energy consumption. It is heavy, easy to be corroded, and has poor electrical conductivity. Traditional aluminum shells are generally high-pressure cast, and the internal compactness of the produced products is poor, and heat treatment cannot be performed, which leads to poor mechanical properties of the products and cannot meet the requirements of nuclear power products. The use requirements, and the service life is short, and a single aluminum product cannot meet the correspondin...

AI Technical Summary

Problems solved by technology

[0002] Traditional motor casings are generally made of separate materials and high-pressure casting. Nuclear power motors have high requirements and require an integrated structure. Most motors in the prior art are cast from ferrous metals, which cause high environmental pollution and high energy consumption. It is heavy, easy to be corroded, and has poor electrical conductivity. Traditional aluminum shells are generally high-pressure cast, and the internal compactness of the produced products is poor, and heat treatment cannot be performed, which leads to poor mechanical properties of the products and cannot meet the requirements of nuclear power products. The use requirements, and the service life is short, at the same time, a single aluminum product cannot meet the corresponding electrical conductivity requirements

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