A water meter rectifier

Abstract

A water meter rectifier relates to the technical field of instruments and comprises a rectifying tube, a net plate, a first rectifying member, a second rectifying member and a third rectifying member,wherein the net plate, the first, second and third rectifying members are disposed in the rectifying tube and orderly arranged in a water flow direction; the first rectifying member is semi-sphericaland a spherical surface faces a water flow downstream direction; a semi-spherical sub-cavity is recessed in the first rectifying member; the first rectifying member has a plurality of first through holes axially formed in a rectifying cavity; the second rectifying member is provided with a plurality of first through holes axially formed in a rectifying cavity; an aperture ratio between the secondthrough holes and the first through holes is 1 to 3 to 8; the third rectifying member has a center shaft, a first diversion plate, a second diversion plate and a third diversion plate; the first, second and third diversion plates are connected to the center shaft; end surfaces of the first, second and third diversion plates all have contact with the end surface of the second rectifying member; and a length ratio of the above three is between 1 to 1.3 and 1.8 to 2.5. Test water flows of the water meter can be rectified and water meter testing accuracy and test result credibility can be enhanced.

Description

technical field [0001] The invention relates to the technical field of instruments, in particular to a water meter rectifier. Background technique [0002] During the test of the water meter, the requirements for the water flow used in the test are very high, especially the direction of the water flow, which is very critical for the test. When the water flow flows in the water pipe, especially after flowing through the elbow, the water flow is easy to change into a water flow form with rotation and splashing characteristics, which will seriously affect the driving effect of the water flow on the transmission mechanism of the water meter, thus affecting the water meter. Measurement accuracy, which in turn affects the accuracy of water meter testing. Contents of the invention [0003] The first object of the present invention is to provide a water meter rectifier, which can rectify the test water flow of the water meter, adjust the test water flow to laminar flow, and impro...

AI Technical Summary

Problems solved by technology

When the water flow flows in the water pipe, especially after flowing through the elbow, the water flow is easily transformed into a water flow form with rotation and splash characteristics, which will seriously affect the driving effect of the water flow on the transmission mechanism of the water meter, thereby affecting the water meter. Measurement accuracy, which in turn affects the accuracy of water meter testing

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