Pneumatic driving type paddy field weeding device

Abstract

The paddy field inter-row weeding device driven by air belongs to agricultural machinery; a fixed sleeve coaxial with the lower end of the rigid pipe is arranged, a fixed blade is arranged on the outside of the sleeve, a cylindrical shaft is arranged in the coaxial cavity of the rigid pipe and the sleeve and is radially and axially positioned and circumferentially rotatable, the lower end of the cylindrical shaft is located outside the lower end of the sleeve, a barrel-shaped nozzle is arranged on the lower end of the cylindrical shaft, a moving blade and a spiral blade are sequentially arranged on the outer wall of the barrel-shaped nozzle from top to bottom, the moving blade is located below the fixed blade, a tangential through hole is formed on the tangential direction of the bottom end side wall of the barrel-shaped nozzle, and the two ends of a liquid medicine conveying hose are fixedly connected to a liquid medicine one-way valve and the rigid pipe respectively; the device combines the mechanical weeding and the chemical weeding in the paddy field, performs the combined operation by using the driving mode of the pneumatic principle, has the characteristics of novel, unique and reasonable structure, high weeding efficiency and weed mortality, saving of weeding agent, less residue of crop chemical agent and light environmental pollution.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery and mainly relates to a weeding device suitable for weeding operations between rows in paddy fields. Background Technology

[0002] Weeds are an unavoidable environmental factor during rice growth, severely impacting yield. Mechanical weeding, as a physical method, has become a primary method of weed control in paddy fields due to its advantages such as no environmental pollution, no pesticide residues in crops, and environmental friendliness and safety. However, existing inter-row weeding devices in paddy fields can only remove weeds from the soil, causing them to float on the water surface or be buried in the mud, failing to guarantee or achieve the desired weed death effect. Furthermore, they can easily damage rice seedlings and their root systems. Chemical weeding methods using herbicides are also widely used due to their high efficiency and ease of operation; however, the large amounts of herbicides applied lead to pesticide residues in crops and environmental pollution. Therefore, designing a novel mechanical inter-row weeding device for paddy fields that can simultaneously and rationally apply herbicides can effectively improve weed control efficiency and operational quality, providing a guarantee for the production of green and organic rice. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in combination with the actual needs of current paddy field inter-row weeding operations, to develop and design a pneumatically driven paddy field inter-row weeding device, so as to achieve the goals of good weeding quality, high weed mortality rate, and low environmental pollution.

[0004] The purpose of this invention is achieved as follows: A fixed sleeve is coaxially mounted on the lower end of a rigid pipe, and a fixed blade is fixed on the outside of the sleeve. A cylindrical shaft is radially and axially positioned and rotatably mounted in the inner cavity coaxial with the rigid pipe and the sleeve. The lower end of the cylindrical shaft is located outside the lower end of the sleeve. A barrel-shaped nozzle is fixed on the lower end of the cylindrical shaft. A moving blade and a spiral blade are fixed sequentially from top to bottom on the outer wall of the barrel-shaped nozzle. The moving blade is located below the fixed blade and they are in shearing engagement with each other. A tangential through hole is opened along the tangential direction on the side wall of the bottom end of the barrel-shaped nozzle, and the tangential through hole is inclined upward from the inside to the outside. The two ends of the pesticide delivery hose are respectively fixed to the pesticide one-way valve and the rigid pipe, thus forming a pneumatically driven inter-row weeding device for paddy fields.

[0005] This invention utilizes pneumatic principles to drive the rotating blades, which, in conjunction with the fixed blades, cut and pulverize weeds. Combined with an airflow-delivered herbicide spraying structure, it achieves chemical weed control. This combination of mechanical weeding through shearing and pulverizing and chemical weeding through airflow results in a novel, unique, and rational structure with high weeding efficiency and mortality, herbicide savings, low pesticide residues on crops, minimal environmental pollution, and no damage to seedlings or roots. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of a pneumatically driven weeding device for inter-row cultivation in paddy fields.

[0007] Figure 2 yes Figure 1 Sectional view along line A-A in the middle;

[0008] Part number description in the image:

[0009] 1. One-way valve for liquid medicine; 2. Liquid medicine delivery hose; 3. Rigid pipe; 4. Cylindrical shaft; 5. Sleeve; 6. Fixed blade; 7. Moving blade; 8. Barrel-type nozzle; 9. Tangential through hole; 10. Spiral blade. Detailed Implementation

[0010] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. A pneumatically driven weeding device for inter-row cultivation in paddy fields includes a fixed sleeve 5 coaxially mounted on the lower end of a rigid pipe 3, with a fixed blade 6 fixedly mounted on the outside of the sleeve 5. A cylindrical shaft 4 is radially and axially positioned and rotatably mounted in the inner cavity coaxial with the rigid pipe 3 and the sleeve 5. The lower end of the cylindrical shaft 4 is located outside the lower end of the sleeve 5. A barrel-shaped nozzle 8 is fixedly mounted on the lower end of the cylindrical shaft 4. Moving blades 7 and spiral blades 10 are fixedly mounted sequentially from top to bottom on the outer wall of the barrel-shaped nozzle 8. The moving blades 7 are located below the fixed blades 6 and are in shearing engagement with each other. A tangential through hole 9 is opened along the tangential direction on the bottom side wall of the barrel-shaped nozzle 8, and the tangential through hole 9 is inclined upward from the inside to the outside. The two ends of the liquid delivery hose 2 are respectively fixedly connected to the liquid one-way valve 1 and the rigid pipe 3.

[0011] In use, the device is fixed to a paddy field weeding and cultivation implement that provides pressurized airflow and liquid herbicide via rigid pipe 3. The pressurized airflow enters the barrel cavity of the barrel nozzle 8 through rigid pipe 3 and cylindrical shaft 4, while the liquid herbicide enters the rigid pipe 3 through the liquid delivery hose 2 via the liquid one-way valve 1. During operation, the barrel nozzle 8 is placed above the rice seedlings in the paddy field and moved forward. As needed for weeding and cultivation, the barrel nozzle 8 is lowered and inserted into the paddy field soil through rigid pipe 3. The externally input pressurized airflow passes sequentially through rigid pipe 3 and cylindrical shaft 4 into the paddy field soil. The air enters the barrel cavity of the barrel-type nozzle 8 and is sprayed out from the tangential through hole 9. Under the reaction force of the sprayed air pressure, the barrel-type nozzle 8 drives the moving blade 7 to rotate in a circle. As the device moves forward, it works in conjunction with the shearing of the fixed blade 6 to cut and crush the weeds between the rows of the paddy field. At the same time, the spiral blade 10 digs the weeds out of the mud layer of the paddy field and outputs them upward, so that the roots of the weeds are separated from the soil. Based on the upwardly inclined tangential through hole 9, the sprayed air is directed upward, which in turn blows the crushed weeds onto the surface of the paddy field soil and water layer, which greatly improves the mortality rate of weeds. Simultaneously, the flow of pressurized gas within the rigid pipe 3 creates a negative pressure within the cavity of the liquid delivery hose 2. Under the suction of this negative pressure, the one-way valve 1 opens, allowing the externally supplied liquid herbicide to enter the rigid pipe 3 through the liquid delivery hose 2 and mix with the pressurized gas flow. Under the action of the pressurized gas flow, the herbicide is sprayed upwards into the paddy field soil via the cylindrical shaft 4, the barrel nozzle 8, and the tangential through-hole 9, thus carrying out herbicide application.

Claims

1. A pneumatically driven inter-row weeding device for paddy fields, characterized in that: A fixed sleeve (5) is coaxially mounted on the lower end of the rigid tube (3). A fixed blade (6) is fixed on the outside of the sleeve (5). A cylindrical shaft (4) is radially and axially positioned and rotatably mounted in the inner cavity coaxial with the rigid tube (3) and the sleeve (5). The lower end of the cylindrical shaft (4) is located outside the lower end of the sleeve (5). A barrel nozzle (8) is fixed on the lower end of the cylindrical shaft (4). A moving blade (7) and a spiral blade (10) are fixed on the outer wall of the barrel nozzle (8) from top to bottom. The moving blade (7) is located below the fixed blade (6) and they are in shear fit with each other. A tangential through hole (9) is opened on the bottom side wall of the barrel nozzle (8) along the tangential direction. The tangential through hole (9) is inclined upward from the inside to the outside. The two ends of the medicine delivery hose (2) are fixedly connected to the medicine one-way valve (1) and the rigid tube (3) respectively.

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