Performance of Three DifferentSpades for Residual Plastic Film Recycling Machine

Yang, Shiping; Chen, Xuegeng; Yan, Limin; Jiang, Deli

doi:10.13031/aea.13368

Cited by 12 publications

(13 citation statements)

References 18 publications

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“…Bringing Equation (31) into Equation ( 21), it can be seen that when λ takes 1, L 1 ≤ 0.317 m. Therefore, the maximum spacing (L 1 ) between two adjacent pickup nail teeth can be 285.75 mm. At this point, the tensile force received by the plastic film is less than its longitudinal breaking force, meeting the operational requirements of the picking device.…”

Section: Force Analysis Of Residual Filmmentioning

confidence: 99%

“…At this time, the residual film could not be picked up. After the operation of the machine, there was a hole mark on the residual film, but the residual film was still attached to the soil [31].…”

Section: Force Analysis Of Residual Filmmentioning

confidence: 99%

“…The residual film is not easily supported by the film shovel and is dragged up and easy to miss, and this causes a low recovery rate of the residual film. According to the width of 1800~1900 mm after plastic-film mulching [32], a total of 15 film shovels were arranged on the film surface. A film shovel is arranged in the middle of two narrow rows of cotton.…”

Section: Main Parameters Of Shovel Film-lifting Devicementioning

confidence: 99%

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Design and Testing of Friction-Type Nail-Tooth-Chain-Plate Residual-Film-Picking System

Jiang,

Chen,

Yan

et al. 2024

Agriculture

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Compared with the conventional horizontal conveyor-chain-type plastic-film-picking device, the longitudinal nail-tooth-chain-plate-type plastic-film-picking device developed by our team in the early stage has little tearing effect on the mulching film, and the separation effect of the plastic film and the impurity is better. With a view to further enhancing the performance of the plastic-film-picking device, this study optimized it and designed a friction-type nail-tooth-chain-plate plastic-film-picking chain that does not overload or slip and also facilitates the installation of functional components. The kinematic analysis of the picking nail teeth on the film-picking chain was carried out, and the motion equation and trajectory of the nail teeth during the operation were determined, as well as the requirements for the nail teeth to complete the mulching-film pickup. The key parameters of the plastic-film-picking system were determined by analyzing the no-leakage condition of the plastic film and the force. Moreover, the structural design and key parameters of the shovel-type film-lifting device were determined. According to the design results, a prototype was developed, and a multi-factor test of the operating parameters was carried out. The operating speed, spacing of the pickup nail teeth, depth of the film shovel into the soil, and distance between the tip of the film shovel and center of the picking drum were used as the experimental factors. The plastic-film pickup rate, impurity rate of the recovered mulching film, and traction resistance were used as the test indicators. A four-factor, five-level quadratic regression orthogonal combination experiment was conducted using the Central Composite Design (CCD). The effect of each test factor on the test index of the plastic-film-picking system was studied, the regression models were established, and the optimal parameter combination was acquired by using the multi-objective optimization method. When the working speed was 6 km/h, the pickup-nail-tooth spacing was 228.6 mm, the depth of the film-lifting shovel into the soil was 37 mm, and the distance between the tip of the film shovel and the center of the pickup drum was 130 mm, the field experiment shows that the plastic-film pickup rate was 90.12%, the impurity rate of the recovered mulching film was 8.96%, and the traction resistance was 19.905 kN. The relative errors between the test results and the predicted values of the regression models were less than 5%, indicating that the parameter optimization regression models were reliable, and the designed friction-type nail-tooth-chain-plate plastic-film-picking system met the technical requirements of agricultural-plastic-film recycling. The research results can provide a technical reference for the development of mulching-film collection machines.

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Section: Force Analysis Of Residual Filmmentioning

confidence: 99%

Section: Force Analysis Of Residual Filmmentioning

confidence: 99%

Section: Main Parameters Of Shovel Film-lifting Devicementioning

confidence: 99%

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Design and Testing of Friction-Type Nail-Tooth-Chain-Plate Residual-Film-Picking System

Jiang,

Chen,

Yan

et al. 2024

Agriculture

Self Cite

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“…The particle trajectory is shown in Figure 8a, so the lower limit of wind speed is 14.5 m/s. It may be determined that there is air-assisted film-stripping at the particle inlet by selecting the middle horizontal section of the fluid domain as the study object and analyzing the velocity distribution of the airflow field, as shown in Figure 8b,c [25]. The standard k-ε model and the standard wall function method are used to calculate the flow field, and the DPM is used to calculate the particle motion.…”

Section: Numerical Computation Of Dpmmentioning

confidence: 99%

Design and Test of Stripping and Impurity Removal Device for Spring-Tooth Residual Plastic Film Collector

Peng

Wang

et al. 2022

Agriculture

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The residual agricultural plastic film in China is not easily recovered due to the thinness and poor mechanical properties of domestic films, and a large amount of plastic film remaining in farmland soil poses a great threat to soil quality and crop production. A spring-tooth residual plastic film collector (SRPFC) is widely used in domestic residual plastic film (RPF) recycling operations. However, there are two major problems in the current SRPFC: the low recovery rate of the residual film (RRRF) caused by the difficulty of film-stripping and the high impurity rate in the film (IRF). In this paper, a stripping and impurity removal device (SIRD) is designed to address the existing problems of SRPFC, which is mainly composed of film-stripping tooth plates (FTP), two wind-collecting hoods, and two centrifugal fans. The motion and force analysis of the RPF in the film-stripping process was carried out, and the arc FTP was determined to be used for film-stripping. The size parameters of the FTP were obtained by establishing the coordinate system to solve the differential equation. By comparing and analyzing the force of RPF in the airflow field of the test bench for suspension speed and the airflow field of the wind-collecting hood, the RPF equivalent particle was established. The discrete phase model (DPM) in Fluent software was used to simulate the movement of the RPF equivalent particle, and the calculated air volume range of the centrifugal fan was 5501.88~6829.92 m3/h. The effects of forward speed, rotating speed of film conveying chain harrow (FCCH), and rotating speed of the centrifugal fan on RRRF and IRF were studied by orthogonal rotary combination experiment. The test results showed that the best combination of machine operation parameters was when the forward speed was 5 km/h, the rotating speed of the FCCH was 235 r/min, and the rotating speed of the centrifugal fan was 1978 r/min. Under these conditions, the RRRF was 92.53%, and the IRF was 9.31%. Field experiments were carried out with the rounded parameters, and the average RRRF was 92.07%, and the average IRF was 9.56% under the parameter combination, indicating that the optimization scheme of the device was feasible.

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“…Compared with planting cotton in open fields, planting cotton with film mulching cultivation can increase the production by 30~50% in general and 40~60% at most. According to statistics, mulch film could be detained for 8~10 years in the soil, and the average residue quantity of waste film reaches 187.5 kg per hectare, which causes the production to reduce by 17% [4][5][6][7][8][9][10][11][12]. The looser the soil is, the lower the moisture content and viscosity are, and the higher the plastic film pick-up rate is.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Research of a New Film-Picking Mulch Film Recovery Machine with Impurity Separation Function

Dong

et al. 2022

Processes

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When the film is under no stress, it does not show any stiffness or capability to withstand loads. Therefore, with the help of ANSYS motion, the author applied pre-stress, controlled point coordinates and the equation of equivalent stress surface and used form-finding conditions to explore the equilibrium state of the films in different depths. The author established curve fitting equations and designed a new membrane-removing mulch film recovery machine. The author also analyzed key components and separately established regression equations between recovery rate, damage rate, release rate and the working angle of film picking mechanism, as well as the regression equation between the depth of picking mechanism into the soil and the working angle of clamping conveyor. Then the author conducted the variance analysis on these regression equations. By using Design Expert 8.0.6 to optimize the solution, when the working angle of the pick-up mechanism is 27.31°, the depth of the pick-up mechanism is 73.0 mm. The working angle of the clamping and conveying device is 38.33°, the recovery rate is 93.9% and the damage rate is 89.3%. The test result shows that when parameters are set as above values, the recovery rate of residual film is 92.5%, the release rate is 87.6% and the error values of damage rate and release rate are both lower than 1.5%, which have verified the feasibility of the optimization solution. The experimental result can work as a reference for the optimum working parameters of the new membrane-removing mulch film recovery machine.

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Performance of Three DifferentSpades for Residual Plastic Film Recycling Machine

Cited by 12 publications

References 18 publications

Design and Testing of Friction-Type Nail-Tooth-Chain-Plate Residual-Film-Picking System

Design and Testing of Friction-Type Nail-Tooth-Chain-Plate Residual-Film-Picking System

Design and Test of Stripping and Impurity Removal Device for Spring-Tooth Residual Plastic Film Collector

Design and Experimental Research of a New Film-Picking Mulch Film Recovery Machine with Impurity Separation Function

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