A Method for Determining the Air Pressure Needed by Air Jet to Seedling Pot of Pinus pine

Abstract

The invention belongs to a method for determining a gas pressure required for jacking to loosen a plug seedling bowl body by a gas jet in the field of agricultural machinery. The method comprises thesteps as follows: measuring a tray separating force of the plug seedling bowl body, i.e., by utilizing a mechanical testing system, applying a quasi-static drawing force to plug seedlings and measuring a maximum acting force for completely taking the plug seedlings out of soil holes of a hole tray and loosening adhesion of the soil holes of the hole tray as the tray separating force of the plug seedling bowl body; measuring a gas jet pipe diameter, i.e., measuring a distance on each soil hole in the whole hole tray from the symmetric center point of the soil hole to the center point of a drainage exit at the bottom of the soil hole, and calculating to determine a minimum internally-tangent circle diameter from the symmetric center point of the soil hole to the edge of the drainage exit atthe bottom of the soil hole as the gas jet pipe diameter; and determining the gas pressure required for jacking to loosen the plug seedling bowl body by the gas jet. The method determines the gas pressure required for jacking to loosen the plug seedling bowl body according to the effective action of a gas jet core region, provides the reliable theoretical basis for application of a pneumatic bowljacking technology and can be used in the field of high-efficiency transplantation of plug seedlings.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and in particular relates to a method for determining the air pressure required by a gas jet for a top pine hole tray seedling pot. Background technique [0002] Vegetable and flower intensive seedling raising technology is developing rapidly. The annual output of commercial seedlings of vegetables alone reaches more than 80 billion. Our country will face a huge task of transplanting every year. With the reduction of agricultural labor force and the increase of labor cost, the development of mechanized transplanting technology has been stimulated, and various types of semi-automatic transplanting machines that are manually fed seedlings have been popularized and applied on a small scale. In recent years, many domestic universities and scientific research institutes have started research on automatic transplanting technology, but there is no mature product yet. [0003] The seedlings in the ...

AI Technical Summary

Problems solved by technology

Due to the difference in manufacturing process, the shape and size of the tray are standard, but the size of the hole and the size of the drain are different. Using the air nozzle to directly lift the pot from the smaller drain at the bottom of the tray requires high positioning accuracy, otherwise it is easy to eject the seedling pot. topping

In addition, the determination of the air flow pressure that requires the air nozzle to be used for the pneumatic top bowl in use is judged by engineering experience, and there is no scientific basis

Images