Design And Experimental Research Of Beater For Removing Cadmium

Cadmium pollution,as one of the heavy metal pollution in the soil of southern my country,is not only related to the cultivation of rice and the development of green agriculture,but also to the daily health of the people.Lime can effectively remove cadmium.A light beater is developed and a lime spreading device is installed.The lime and soil are fully mixed by spreading and repeatedly stirring in the field to reduce the effective cadmium content in the soil.In view of the small paddy field area in the south,deep mud feet,and easy sinking,based on the analysis of existing paddy farming machines,rotary tillers,sitting tillers and other paddy field tillage machines,combining modern agricultural big data and information technology,Developed a two-wheel drive small remote control beater adapted to the characteristics of southern paddy fields for spreading and mixing,and carried out relevant test verification with the uniformity of mixing and the uniformity of spreading.The main conclusions are as follows:(1)Through reading relevant domestic and foreign literatures,we learned that soil cadmium pollution in the south is serious,and lime can effectively reduce cadmium.In order to reduce the inconvenience caused by artificially spreading lime,a design adapted to the characteristics of muddy feet in the southern paddy field and complex terrain The machine is equipped with a lime spreading device to complete the lime spreading at the same time as the paddy field tillage and beating operation,so as to achieve the purpose of improving the soil environment.(2)On the basis of comparing the existing paddy field tillage machinery,after the research and field test of the sixth generation model,the model of the cadmium removing beater was determined,which mainly includes several aspects: the power type is green environmental protection electric energy,The chassis is a curved chassis,the driving method is two-wheel drive,the walking control method is remote control,the beating method is reciprocating agitation after rotary tillage,and the lime spreading method is to control the opening size of the loose leaf and the rotation of the agitator to make the lime fall freely.(3)Through the summary of the sixth-generation models,it is clear that the final seventh-generation beater completes the cultivation and beating operations at one time,without deepening the muddy feet of the paddy field,and not applying too much lime.The beating depth is 5-15 cm,The mud degree is less than 1.6g / cm3,uniform application requirements,etc.;and use remote control for remote control work,using electric drive mode,designed a five-level transmission power box,straight blade type blade,single-wheel steering wheel steering,Manually adjust the plough depth device,agitate the dragon and spread the box,etc.(4)Mainly designed for front-wheel steering and two-wheel drive,and selected multiple electronic components such as LM7805 voltage regulator chip,LM2596 voltage regulator chip,ASM117 forward low drop voltage regulator,etc.5V voltage conversion,and use the combination of Futaba remote control,RISK receiver and STM32F407ZGT6 microcontroller to achieve precise remote control of the machine,Keil u Vision5 design and programming.(5)For lime can effectively reduce cadmium in the field,with the mixing degree of lime and mud as the object,the mud degree and the coefficient of variation of the uniformity of spreading as the standard,conduct the mixing uniformity test and the spreading uniformity test to obtain relevant data and verify Whether the beater can achieve stable beating and spreading,and can fully mix mud and lime in the field.The field test shows that the mud degree is between 1.27 and 1.57,which meets the requirements of field beating.The coefficient of variation of spreading uniformity is 11.7-15.0%.The uniformity is good.