A weighing device based on micro liquid flow detection

By improving the design of the inlet and overflow pipes and combining them with anti-evaporation measures, the measurement error caused by impact force and evaporation in the detection of small liquid flow rates has been solved, thus achieving flow rate stability and weighing accuracy.

CN224353904UActive Publication Date: 2026-06-12GUANGZHOU INST OF MEASURING & TESTING TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGZHOU INST OF MEASURING & TESTING TECH
Filing Date
2025-06-26
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing micro-liquid flow detection devices suffer from impact forces that affect measurement accuracy during the detection process, as the liquid enters the weighing container in the form of a free-falling jet. Furthermore, evaporation introduces uncertainty, making it difficult to guarantee the accuracy of the measurement results.

Method used

The structure design of the liquid inlet pipe, connecting pipe and overflow pipe makes the liquid inlet pipe submerged in liquid, reducing the impact of impact force, and suppresses evaporation through the anti-evaporation structure. The anti-evaporation tank formed by the annular bottom plate and the annular surrounding plate reduces the uncertainty of evaporation.

Benefits of technology

This improves the stability and accuracy of flow rate measurement, reduces the impact of buoyancy and evaporation on the measurement, and ensures the reliability of the weighing results.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a weighing device based on the detection of minute liquid flow rates, comprising: a measuring cup; an overflow groove at the bottom of the measuring cup; the overflow groove being connected to the measuring cup; a cup lid at the top of the measuring cup; an inlet pipe and an overflow pipe inserted into the cup lid; the bottom of the inlet pipe extending into the measuring cup, and the bottom of the inlet pipe having a sealed structure; the bottom of the overflow pipe extending into the overflow groove; the inlet pipe being connected to the overflow pipe via a connecting pipe; and the connecting pipe being disposed inside the measuring cup. This utility model, by inserting the liquid inlet pipe into the inlet pipe with its end located below the connecting pipe, ensures that the liquid inlet pipe is always submerged in the liquid during the liquid inlet process. Simultaneously, by extending the bottom of the overflow pipe into the overflow groove, it effectively avoids the impact of free-falling liquid on the measuring container, thereby ensuring the stability of the inflow liquid flow rate and thus guaranteeing the accuracy of the weighing results.
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