Design and Test of a New Type of Coupling Weeder

In order to improve the efficiency of mechanical weeding and reduce the injury rate caused by work. This paper improves the shortage of traditional weeding machinery, and designs a new combined mechanical weeding device by optimizing the internal structure and increasing the operation function. In this device, the structure of the cutter tooth is optimized and the operation function is added. Secondly, the effect of the weeding is further enhanced by increasing the flame nozzle. Finally, the finite element analysis of the blade and the nozzle is carried out by CFD and COMSOL software, and the rationality of the improvement is explained. The field weeding test showed that the average weeding rate of the machine was 86% and the rate of injured seedlings was 3.5% under the conditions of different advancing speed (0.5, 1, 1.5m/s) and the soil depth of the weeding wheel (3, 6, and 9cm). According to the speed and width of the machine, the efficiency of the machine is 0.7~2hm2/h. The collection performance and operation efficiency meet the technical requirements of weeding operation in dry field machinery. Through the comparison test of mechanical weeding, heat weeding and the effect of combined mechanical weeding, the efficiency of combined mechanical weeding in the test area is higher than that of other weeding methods. This study can provide a reference for the effect of weeds treatment on the dry field weeding machine.