Impeller box

Abstract

The invention discloses an impeller box which comprises a casing, a gear box located above the casing, a plurality of upper base ribs, lower base ribs, a plurality of water outlets and a plurality of water inlets. The ends of the inner sides of the plurality of upper base ribs form circles, the radius of every circle is 1 / 6 to 1 / 3 of the inner diameter of the casing, the height of every upper base rib is larger than 4mm, the height of every lower base rib is 2-4mm, an included angle between every two adjacent lower base ribs is larger than or equal to 10 degrees and smaller than or equal to 45 degrees, the sum of areas of upper openings of the plurality of water outlets is 1 / 3 to 2 / 3 of the area of the end face of a side wall of the casing 1, the sum of widths of water inlet ends of the plurality of water inlets is 1 / 3 to 1 / 2 of the length of an outer periphery of the casing, the sum of widths of water outlet ends of the plurality of water inlets is 1 / 3 to 1 / 2 of the length of an inner periphery of the casing, and the height of every water inlet exceeds 1 / 2 of the height of every blade. Compared with the prior art, the impeller box can simultaneously reduce measurement errors of a water meter during large flow and small flow, measurement precision of the water meter is improved, and the measuring span of the water meter is expanded.

Description

technical field [0001] The invention belongs to the technical field of water meters, in particular to an impeller box. Background technique [0002] With the widespread use of tap water all over the world, water meters for measuring water consumption are an indispensable tool in the popularization of tap water. [0003] In order to control the speed of the water meter and the measurement accuracy of the water meter, at present, many water meter movements are adjusted by adjusting pieces. For such a structure, since the adjusting plate is located at the water inlet of the water flow channel of the water meter movement, the water flow will have a certain reflection effect on the water flow after touching the adjusting plate, which will inevitably cause interference to the water flow and affect the water flow to a certain extent. to the measurement accuracy of the water meter. [0004] To design a water meter with higher performance, on the one hand, it is necessary to contro...

AI Technical Summary

Problems solved by technology

Therefore, the existing water meters are often insensitive to water flow when there is a small flow, resulting in too slow impeller speed, and too fast impeller speed when there is a large flow

The range and accuracy of the existing water meters are greatly affected

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