Impeller installation structure for injection-molding magnetoelectric water meter

Abstract

The invention discloses an impeller installation structure for an injection-molding magnetoelectric water meter. The structure comprises a bottom bracket and a supporting seat, wherein the bottom bracket is embedded and positioned at the bottom of an upper pipe cavity in a matching manner; the supporting seat is fixedly connected with the upper pipe cavity, and tightly presses the bottom bracket; a plurality of hollow grids are formed in the bottom bracket; an installation slot hole is formed in the middle part of the bottom bracket; rotary shafts at two sides of an impeller are respectively connected with positioning blocks in an injection molding manner; the positioning blocks can be embedded in the hollow grids at two sides of the installation slot hole in the matching manner, and are tightly pressed by the supporting seat, so that the impeller is positioned in the installation slot hole. The impeller installation structure disclosed by the invention has the advantages that the processing precision of the hollow grids corresponding to the positioning blocks is guaranteed due to the adoption of a pressing-type positioning manner, so that the processing precision requirement is reduced, the assembly difficulty is reduced, and the measurement accuracy of a product is improved; an insert part is adopted in a mold development process, so that the mold manufacture cost and mold use cost are reduced while the processing precision and product yield are guaranteed, and the manufacture cost of the water meter is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of water meters, in particular to an impeller installation structure of an injection-molded magnetoelectric 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] B...

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

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