A mechanical device for returning crop straws to the field by cutting straws

Abstract

The invention discloses a mechanical device capable of returning crop straw to a field in place through straw cutting. The mechanical device comprises a harvesting unit, wherein the harvesting unit isconnected with a cutting system which is connected with a negative-pressure and spraying unit; the harvesting unit comprises a supporting frame which is successively provided with harvesting heads, aguide feeding unit and an inlet of the cutting system along a direction opposite to the forward motion direction of the mechanical device; the cutting system comprises a tubular supporting shell; oneend of the supporting shell is connected with the inlet of the cutting system; the other end of the supporting shell is connected with the negative-pressure and spraying unit; and the interior of thesupporting shell is successively and rotatably provided with a first briquetting wheel set, a second briquetting wheel set and a cutting tool along the flow direction of a straw flow. The mechanicaldevice capable of returning the crop straw to the field in place through straw cutting provided by the invention can realize precise cutting of the straw, thereby improving the decomposition efficiency of the straw after the straw returns to the field.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery and equipment, and relates to a mechanical equipment for returning crop stalks to fields in situ by cutting stalks. Background technique [0002] Straw returning is a method of applying straw as a by-product of crops to the soil directly or after stacking and decomposing. Straw contains a large amount of fresh organic materials. After returning to the farmland, after a period of decomposition, it can be transformed into organic matter and available nutrients, which can not only improve the physical and chemical properties of the soil, but also supply certain nutrients. Straw returning to the field can promote agricultural water saving, cost saving, increase in production and efficiency, and has received full attention in environmental protection and sustainable agricultural development. Although straw returning has many advantages mentioned above, there are still some problems due ...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the cutting principle of the rotary tiller, most of the straw debris after cutting is in the form of thin and thin flakes rather than powder, and the specific surface area for microorganisms to attach is still large, and the soil void after returning to the field is larger than Normal level, the phenomenon of moisture loss is serious, which will seriously affect the sowing of next season's crops

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