Grain screening machine with scraping plate impurity removing structure

Abstract

The invention discloses a grain screening machine with scraping plates impurities removing structure. The machine comprises a feeding box, an impurities removing box and a material storage hopper, wherein a grain stirring wheel is arranged in the feeding box, a discharging pipe is arranged on one side of the grain stirring wheel, a light impurities outputting opening is formed in one side, far away from the grain stirring wheel, of the discharging pipe, and a fan is fixedly arranged above the light impurities outputting opening; and the chain is sequentially and fixedly connected with a nylonscraping plate device, a brush scraping plate device and a PVC scraping plate device, wherein the nylon scraping plate device comprises an installing mechanism and a nylon scraping plate, the brush scraping plate device comprises an installing mechanism and a brush scraping plate, the PVC scraping plate device comprises an installing mechanism and a PVC scraping plate. According to the machine, the impurities which cannot be removed on the existing machine can be well removed by comprehensively using the scraping plates of three different materials, labor is saved, and meanwhile, the production yield is greatly improved under the condition that the size of an original screening net surface is not changed, the practicability is strong, and the machine is worthy of popularizing.

Description

technical field [0001] The invention relates to the technical field of grain screening, in particular to a grain screening machine with a scraper structure for removing impurities. Background technique [0002] At present, the sieves for removing impurities in grains are cylindrical sieves and vibrating sieves. Due to the low output of cylindrical sieves, the impurity removal effect generally cannot meet the needs of most users. At present, the impurities removal of vibrating screens on the market is divided into light impurities, medium impurities and large impurities. Light impurities are removed by fans, and medium impurities and large impurities are removed by rolling or vibrating through screens. Due to different types of grains such as rice, wheat and corn, etc., Its impurity content and water content are also different, resulting in poor yield and impurity removal effect. [0003] There are obvious defects in the existing vibrating screen: the grains are piled up in ...

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Problems solved by technology

[0002] At present, the sieves for removing impurities in grains are cylinder sieves and vibrating screens. Due to the low output of cylinder sieves, the impurity removal effect generally cannot meet the needs of most users.

At present, the impurities removal of vibrating screens on the market is divided into light impurities, medium impurities and large impurities. Light impurities are removed by fans, and medium impurities and large impurities are removed by rolling or vibrating through screens. Due to different types of grains such as rice, wheat and corn, etc., Its impurity content and water content are also different, resulting in poor yield and impurity removal effect

[0003] There are obvious defects in the existing vibrating screen: the grains are piled up in one place, and they cannot be spread evenly on the drying surface in a short time, which seriously affects the yield. In the process of removing impurities, light impurities are removed by the negative pressure of the fan. , through the vibration of the sieve to remove the impurities in the grain. However, this method can remove impurities when the water content of the grain is low and the impurities are relatively small. However, when the grain has a large water content and a high impurity content It is difficult to remove impurities under certain circumstances, and it also seriously affects the yield, especially for japonica rice. After harvesting, most of the rice is connected with the stems, and the rice is hung in the mesh hole with the stems, blocking the mesh, and passing through the ordinary The vibration is difficult to remove impurities, and even the impurities completely block the entire drying surface, resulting in the situation that the machine cannot be screened. At this time, the only way to manually remove impurities is to ensure the normal operation of the machine

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