A pollen suspension velocity measuring device

Abstract

The invention relates to a pollen suspension speed measuring device, comprising a frequency conversion speed regulating device, an exhaust fan, an upper airflow guide hole pipe, an observation tube, a sealing slide door, a probe speed measuring instrument, a guide mesh screen, a downward airflow guide hole pipe, and a secondary airflow adjustment. Mesh screen, first-level airflow adjustment mesh screen, airflow retarding cone, airflow adjustment acceleration tube, concentrating hood, collecting and screening powder table, powder table height adjustment mechanism, color-adjustable cold light lamp and test bench; Four observation windows are evenly arranged around the middle section of the observation tube at 90° intervals; the sealing slide door is located on one side of the observation tube; the collecting and screening powder platform is located directly under the collecting hood; the color adjustable cold light lamp can be movably installed on the test bench The present invention can measure the new type of pollen suspension velocity measuring device which can measure the air velocity required when pollen grains are suspended, which fills the blank of domestic air velocity measuring devices required when pollen grains are suspended.

Description

(1) Technical field [0001] The invention relates to a pollen suspension speed measuring device; belonging to the technical field of particle suspension speed measuring, in particular to a novel pollen suspension speed measuring device which can measure the airflow speed required when pollen particles are suspended. (2) Background technology [0002] When the vertical upward airflow flows through the solid particles, the flow resistance and the buoyancy force of the solid particles make the particles move upward, while the gravity of the particles is vertical downward. Under the combined action of the flow resistance, buoyancy and gravity, the solid particles will be in a state of equilibrium, that is, the solid particles will fluctuate on a horizontal surface, neither rising nor falling. Therefore, the vertical upward air velocity when the solid particles are in suspension is defined as the suspension velocity. [0003] Pneumatic technology is widely used in the field of agricultu...

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Problems solved by technology

[0004] However, at present, domestic research on the pollen suspension velocity test has been very little, mainly based on theoretical calculation tests, which have cumbersome operations, complex calculations, and large data errors

However, the existing domestic mechanical material suspension speed measurement equipment mostly adopts manual louver-type air volume adjustment mechanism, which has poor performance in uniformly adjusting the wind speed, resulting in unstable change rate of wind speed, and is greatly disturbed by the external environment. Therefore, the test low precision

If the wind speed is too small, the material may not be sucked into the conical observation tube. Adjust the shutter air volume adjustment mechanism a little. Because the wind speed is too high, the material will pass through the fan blades and rush out of the tube, so it cannot be tested.

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