Filtering and cutting type residual film mixture sorting device based on water pump negative pressure conveying

Abstract

The invention provides a filtering and cutting type residual film mixture sorting device based on water pump negative pressure conveying. The filtering and cutting type residual film mixture sorting device structurally and mainly comprises a feeding, gathering and settling barrel, a filtering and cutting mechanism and a negative pressure conveying device. The working process is as follows: a residual film mixture enters the feeding, gathering and settling barrel under the negative pressure of the water pump, soil and small stones settle to the bottom under the action of rotational flow, cotton stalks and long-strip residual films are gathered upwards to the involute gap filtering stationary knife, the long-strip residual film is sucked into the inner side of the gap of the stationary knife, the cotton stalks are blocked outside the gap of the stationary knife and cannot pass through, and the cotton stalks are separated out of the gap of the stationary knife. The arc-shaped impurity-removing movable cutter rotating at a high speed cuts off long-strip residual films on the outer side of the gap of the fixed cutter, broken films on the inner side are pumped to a residual film recycling box, and the movable cutter rotationally pushes cotton stalks (the diameter is larger than that of the gap of the fixed cutter) blocked on the outer side of the gap of the fixed cutter to a cotton stalk and other material recycling area on the upper portion of the water tank. Effective separation and recovery of the residual films and the cotton stalks are achieved. The device has the characteristics of continuous and reliable residual film shearing, good separation effect and convenience in maintenance.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and in particular relates to a filtering and cutting type residual membrane mixture sorting device based on negative pressure conveying of a water pump. Background technique [0002] The application and promotion of plastic film mulching technology has improved crop yield, quality and benefit, increasing my country's cotton yield by an average of 17.2%. However, since the mulch film is a polyethylene film, it is extremely difficult to degrade under natural conditions and can exist in the soil for 200 to 400 years. The residual mulch film will damage the soil structure, hinder the migration of water, release harmful substances, change the structure of soil microbial population, and reduce soil nutrients. content. In order to deal with the white pollution caused by residual film, domestic research institutions and related enterprises have developed and promoted the recovery of farmland residu...

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Problems solved by technology

[0003] In recent years, scholars at home and abroad have proposed a process scheme of shearing and breaking first, and then separating membrane impurities based on the characteristics of machine-collected residual film materials and their mechanical and physical characteristics, and developed the shearing and breaking, membrane separation methods and methods. Although the equipment research has achieved certain results, there are still problems in the process of shearing and breaking the residual film mixed material, which cannot be continuously and reliably sheared due to the extension and deformation of the flexible strip-shaped residual film and the winding tool, and the separation process of the film stray material after the break. Due to the similar suspension speed, electrostatic characteristics, weight, etc. of the materials, and the large difference in shape, the traditional separation methods (wind selection, electrostatic selection, flotation, inertial selection, screening, etc.) cannot be separated efficiently and with high quality.

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