Flow sensor for a pump

By using resistance strain gauges and the Wheatstone bridge principle in the flow sensor, the problem of existing flow sensors being unable to accurately measure flow rate is solved, achieving both high-precision small flow rate measurement and large flow rate measurement, and also possessing anti-pollution capabilities.

CN122408899APending Publication Date: 2026-07-17LEO GRP ZHEJIANG PUMP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LEO GRP ZHEJIANG PUMP CO LTD
Filing Date
2026-05-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing flow sensors cannot accurately measure flow rate, especially low flow rates.

Method used

The sensor seat and sensor base inside the valve body are used to sense the force on the valve stem by a resistance strain gauge. The force is converted into an electrical signal by the Wheatstone bridge principle and combined with the controller to perform accurate flow calculation.

Benefits of technology

It achieves high-precision, low-flow-rate measurement with a wide range and significant anti-contamination effect.

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Abstract

本申请涉及一种泵用流量传感器，包括阀体、以及设置在所述阀体内的阀腔，所述阀腔上具有进水口和出水口，所述阀腔内设置有传感器座，所述传感器座内设置有传感器基体，所述传感器基体上设置有电阻应变片，所述传感器基体上设置有受力盘，所述阀腔中设置有阀杆，所述阀杆的一端滑动安装在所述受力盘上，所述阀杆的另一端封堵在所述进水口上，所述受力盘与所述阀杆之间设置有弹簧。本申请具有小流量可测的效果。
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