A gas valve tuyere flow monitoring device for a coal mine

By adjusting the blade angle, the flow monitoring equipment for gas valve vents in coal mines has solved the sensitivity and measurement error problems of turbine flow sensors under complex working conditions, thereby improving production efficiency and equipment adaptability.

CN224382555UActive Publication Date: 2026-06-19ANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH
Filing Date
2025-08-29
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

The fixed-angle design of turbine blades in existing turbine flow sensors makes it difficult to adapt to fluctuations in flow range under complex operating conditions, resulting in decreased sensitivity or increased measurement error. Furthermore, replacing blades requires shutdown for calibration, which increases spare parts inventory and management costs.

Method used

An adjustable blade tilt angle flow monitoring device for gas valve vents in coal mines was designed. The blade angle is adjusted by a threaded rod and a limiting plate structure to adapt to flow measurement under different working conditions. The flow rate is determined by measuring the blade rotation speed using a photoelectric sensor.

Benefits of technology

It enables flexible measurement of gas flow under different operating conditions, reduces the frequency of spare parts replacement and calibration time, and improves production efficiency.

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Abstract

This utility model discloses a flow monitoring device for gas valve vents in coal mines, comprising a first pipe, a second pipe, and a photoelectric sensor. Flanges are provided at both ends of the first and second pipes. Bearings are fixedly mounted on a fixed rod, and a fixed shaft is connected to the bearings. A sleeve is fitted onto the fixed shaft, a sliding groove is located on the left side of the sleeve surface, a fixed column is located within the sliding groove, and a connecting shaft is located on the fixed column. The connecting shaft and the fixed column are connected via a bearing. A blade is fixedly connected to one end of the connecting shaft. The connecting rod pushes one end of the blade, causing the blade to rotate via the connecting shaft. Adjusting the blade's tilt angle changes the blade's rotational speed, thus altering the range of gas flow measurement. This device is suitable for measuring gas flow under different conditions.
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