Wind pressure measuring device and method for ventilation pipeline

Abstract

The invention provides a wind pressure measuring device and method for a ventilation pipeline, and relates to the field of wind pressure measurement. The ventilation pipeline pressure measuring deviceof the ventilation pipeline comprises a U-shaped pipe, a connecting pipe and a pipeline connecting structure, the pipeline connecting structure comprises a sealing plate and a windward elbow, a through hole is formed in the middle of the sealing plate, and the windward elbow is fixedly connected into the through hole; the leeward side edge of the sealing plate is provided with a clamping flange,the windward side edge of the sealing plate is provided with a fitting edge, and a magnet is fixed on the fitting edge; the U-shaped pipe comprises a first straight pipe section, a second straight pipe section and a middle section, the connecting pipe is communicated between the windward elbow and the second straight pipe section, and a balance air hole is formed in the end part of the first straight pipe section; liquid level scales are respectively marked on the first straight pipe section and the second straight pipe section and comprise a zero scale, a positive value scale and a negative value scale; and when the pressure at the windward joint is equal to the atmospheric pressure, the liquid levels of the pressure measuring fluid in the first straight pipe section and the second straight pipe section are respectively positioned at zero graduation.

Description

technical field [0001] The invention relates to the technical field of wind pressure measurement, in particular to a wind pressure measurement device and a measurement method for a ventilation duct. Background technique [0002] During the installation of the ventilation system, when the ventilation ducts are initially installed, a wind pressure test is required to ensure that the fans can deliver air to the entire ventilation system. [0003] At present, a water pressure gauge in the form of a U-shaped tube is mostly used to measure the wind pressure in the pipeline. For example, the Chinese invention patent application with the application publication number of CN103454035A and the application publication date of 2013.12.18 discloses a new type of pressure gauge for measuring pipeline pressure. The water pressure meter and its manufacturing method specifically disclose the use of water column pressure difference to measure the pressure of the gas in the pipeline under test...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the object of the present invention is to provide a wind pressure measuring device for ventilation ducts to solve the problems of complex measurement operation, poor measurement repeatability and convenience in the prior art

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