Introduction to the principle of differential pressure gauge
U-shaped inclined differential pressure gauge (hereinafter referred to as differential pressure gauge) is a portable micro-pressure measuring instrument with adjustable inclination angle.
The instrument is equipped with a small tripod and can be used in the field or in mines. The U-shaped inclined differential pressure gauge has the characteristics of convenient use, measurement, and simple structure.
The instrument is used in conjunction with the Pitot tube to measure the wind speed, wind resistance and flow in the coal mine ventilation network, and it can also be used for wind meter calibration.
Structure and working principle The differential pressure gauge is composed of a bottom plate, a flat plate, a supporting plate and a matching tripod.
A connecting nut connected with a tripod is installed under the bottom plate of the U-shaped inclined differential pressure gauge.
A bar level and level fine-tuning screws are installed on the plate.
There are U-shaped glass measuring tubes and scales installed on the supporting plate, and there are brackets and locking devices with adjustable inclination coefficients on the side. The inclination coefficients are 0.1, 0.2, 0.5 and 0.7 respectively.
The height of the legs of the tripod equipped with U-shaped tilting differential pressure gauge is telescopic and adjustable, and has the function of level adjustment and locking.
Working principle The differential pressure gauge is based on the principle of hydrostatics, and uses the height difference formed between the liquid surface of the medium due to the different pressure at both ends of the liquid column to measure the pressure;
Its characteristic is that the glass measuring tube has a certain inclination angle with the horizontal surface, so it can convert the small liquid column height difference into a proportionally enlarged glass measurement division value.
