Wind speed and wind volume measuring device based on static pressure principle

Abstract

The invention relates to a wind speed and wind volume measuring device based on the static pressure principle. The wind speed and wind volume measuring device comprises a box body with two openings at two ends; one opening is an air inlet, and the other opening is an air outlet; a rectification grating is arranged and mounted in the air inlet; the inner box body behind the rectification grating serves as an air flow channel; pitot tubes are uniformly laid in the air flow channel; each pitot tube is only provided with an air inlet and a full-pressure port; the full-pressure port of each pitot tube is communicated with a pitot tube full-pressure gathering tube; the pitot tube full-pressure gathering tube is communicated with a full-pressure gathering tube; a full-pressure conveying tube is arranged and mounted on the full-pressure gathering tube; a static pressure testing tube is laid in the air flow channel. The wind speed and wind volume measuring device combines two testing methods, namely an air channel surface test and a pitot tube static pressure testing hole test, utilizes testing air channel static pressure on the air channel surface to replace the pitot tube static pressure, and reduces route I pitot tube static pressure testing pipeline, so as to reduce air channel throttling; the box body is used to replace part of existing air channel, thereby solving the deficiency of lack of straight tube for wind speed measuring device in a large wind box structure.

Description

technical field [0001] The invention relates to a wind speed and volume measuring device based on the principle of static pressure. Background technique [0002] The combustion adjustment of pulverized coal boilers in thermal power plants mainly depends on adjusting the opening of the small dampers of each secondary air to change the wind speed of the secondary air nozzles. Stable, the test conditions for wind speed and air volume are not good, the test accuracy is poor, and it cannot meet the needs of guiding operation adjustments. Refined combustion adjustment is beneficial to reduce boiler NO X Emissions and prevention of boiler coking are very important to today's strict environmental protection requirements. Accurate and reliable air velocity measurement is a must for fine combustion tuning. [0003] The differential pressure flowmeter is a commonly used wind speed measurement device, but the current differential pressure flow device is installed on the field equipm...

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Problems solved by technology

[0003] The differential pressure flowmeter is a commonly used wind speed measurement device, but the current differential pressure flow device is installed on the field equipment because there is no long straight pipe section to test the airflow direction of the original part and the measurement original part is not perpendicular, and the resistance of the test device itself Large and other problems, resulting in inaccurate tests

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