Multi-flow-direction impeller box assembly and water meter with the same

Abstract

The invention discloses a multi-flow-direction impeller box assembly. The multi-flow-direction impeller box assembly comprises an impeller box, an impeller assembly and an adjusting plate assembly, the side surface and the bottom of the impeller box are each provided with a plurality of equally-divided side surface water inlets and a plurality of equally-divided bottom water inlets, the impeller assembly is rotatably installed on the impeller box, and the adjusting plate assembly is detachably connected with the impeller box. A fluid can enter the impeller box from the side water inlets or the bottom water inlets and flows through the impeller assembly, and free switching between a rotary wing type water meter and a spiral wing type water meter is achieved. The invention further discloses a water meter. The water meter comprises the multi-flow-direction impeller box assembly. Free switching between the rotary wing type water meter and the spiral wing type water meter can be easily achieved, an amplitude of a full-curve performance error of the water meter can be corrected, the measuring precision of the water meter is improved, and the measuring range of the water meter is enlarged.

Description

technical field [0001] The invention relates to a water meter component technology, in particular to a multi-flow direction impeller box assembly and a water meter with the assembly. Background technique [0002] Water meters generally refer to instruments for measuring and accumulating fluid volumes. The water meters on the market mainly include rotor-type water meters and screw-type water meters. [0003] The rotor-type water meter is suitable for the measurement of the total amount of one-way fluid in small-diameter pipelines, and it has the advantage of high-level measurement performance. In addition to several equal water inlets on the side of the traditional impeller box of the rotor-type water meter, there are several bottom holes at the bottom of the traditional impeller box. By adjusting the installation position of the adjustment plate, the size of the bottom bottom hole is adjusted to make the error of the water meter The curves are shifted parallel to within the...

AI Technical Summary

Problems solved by technology

When the fluid directly impacts on the impeller box and continues vertically upward, a large amount of vortex will be generated at the lower part of the impeller, resulting in the increase of the viscous friction resistance moment on the impeller, which increases the resistance of the impeller in large flow, and in small flow due to the vortex Influence, will lead to the reduction of the fluid directly impacting on the impeller, reduce the driving torque of the impeller, affect the measurement accuracy and measurement range of the water meter

[0005] When any water meter needs to be used, the entire water meter can only be replaced, which is costly and time-consuming

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