Periodic gating unit for suction of worms and air and for granary sampling analysis

Abstract

The invention discloses a periodic gating unit for suction of worms and air and for granary sampling analysis. The periodic gating unit comprises a fixed disc provided with a groove, a moving disc arranged in the groove, a guide pipe perpendicular to the moving disc, and a moving disc motor which is connected with the moving disc and used for driving the moving disc to rotate in the groove. The fixed disc is provided with a circle of air guiding holes around the center of the moving disc, and the air guiding holes are evenly distributed. The moving disc is provided with a through hole, and when the moving disc rotates, the through hole can be communicated with the air guiding holes one by one. An elastic pipe head is arranged at the lower end of the guide pipe. The moving disc is provided with a power driving mechanism, wherein a power output end of the power driving mechanism is connected with the guide pipe, and the power driving mechanism is used for controlling the guide pipe to move along the through hole in the axial direction so that sealing between the elastic pipe head and edges of the air guiding holes is realized. The periodic gating unit for suction of the worms and the air and for the granary sampling analysis is reasonable in design and simple in structure, enhances the air tightness of an air suction pipeline, eliminates the air leakage situation and improves work efficiency and accuracy of gas detection results.

Description

technical field

[0001] The invention relates to a granary sampling and analyzing insect pumping periodic gating device for sampling pests or gas extraction and testing in a granary. Background technique

[0002] During the storage of grain in the granary, the pests in the granary are very harmful to the grain, and the air quality in the granary also has a great impact on the storage of the grain. The deterioration of the pest and air quality will bring great economic losses to the stored grain. . For this reason, it is very necessary to be able to forecast early and detect the concentration of stored grain pests, oxygen, carbon dioxide, hydrogen sulfide and other gases in the granary at any time, so as to take timely countermeasures. Chinese utility model patent ZL02269339.4 discloses a granary pest sampler. The periodic gating device in this pest sampler is not air-tight and often leaks air, which makes the efficiency of insect extraction and air extraction low. , especia...

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