Injection molded magnetoelectric water meter shell

Abstract

The invention discloses a casing of an injection-molded magnetoelectric water meter, which comprises a cylindrical body, flanges formed at both ends of the body, vertically arranged in an upper lumen in the middle of the body, and formed on the body There are elongated holes extending axially to communicate with the upper lumen, and the end surface of the upper lumen is injection-molded with a metal connecting sleeve with internal threads, and the outside and / or inside of the main body are formed with staggered or parallel holes. The reinforcing rib is provided, and hollow grooves are formed on the outer surface of the flange. The shell of the water meter of the present invention, compared with cast iron material, reduces the weight by 50% or more, and the cost is greatly reduced, even reduced to a quarter of the original cost. When the effective element analysis is carried out, the analysis shows that when the water meter When the cavity is subjected to a pressure of 2MPa, the maximum stress of the component is 97MPa, which is less than the yield stress of 135Mpa, and there is no risk of failure within the allowable range of the material.

Description

technical field [0001] The invention relates to the technical field of water meters, in particular to a casing of an injection-molded magnetic-electric water meter. Background technique [0002] Traditional water meter housing materials are mainly cast iron, brass, and stainless steel. The water meter case made of cast iron is low in price and high in strength. The disadvantage is that the casting is rough, and it is easy to rust and corrode to pollute the water quality. The water watch case made of brass is easy to process, exquisite in casting, and corrosion-resistant. The disadvantage is that the price is high, the rusty patina is toxic, and the lead in brass is also a harmful substance to the human body. Stainless steel is corrosion resistant and does not rust, making it an ideal material for water meter housings. However, stainless steel materials are difficult to process and expensive, so they can only be used in high-end products. [0003] Because a small amount of...

AI Technical Summary

Problems solved by technology

Recently, some manufacturers claim to manufacture non-corrosion and harmless aluminum alloy water meter shells, but people doubt its long-term practical effect. The price of the aluminum alloy water meter shells is close to or even exceeds that of copper shells, and the prospects are not promising.

[0004] Engineering plastics, such as glass fiber reinforced nylon, such as PA+GF30, is a food-grade polymer material. It is also used by some manufacturers due to its high production efficiency, low energy consumption, light specific gravity, no rust, and corrosion resistance. To make water meters by injection molding, but it has not been widely successful. The main reason is that the existing engineering plastic water meters do not have a good product structure design. The result of applying the shell data of metal water meters can only fail. It cannot meet the pressure test and installation test of the water meter, so it cannot replace the metal shell water meter and enter the household use

Images