Powdery decomposition agent accurate spraying device for directly returning straws to field

Abstract

The utility model discloses a powdery decomposing agent accurate spraying device for directly returning straws to the field. The powdery decomposing agent accurate spraying device comprises a discharging system, an air conveying system, a mounting bracket and a control system, the discharging system comprises a discharging motor, a discharging screw, a discharging pipe, a hopper and a discharging pipe; the discharging screw is mounted in the discharging pipe and is driven by the discharging motor to rotate; the air conveying system comprises a fan, an air pipe, a slit mixing pipe and a diffusion nozzle; the fan is connected with one end of the air pipe, the slit mixing pipe is vertically mounted at the other end of the air pipe, and the diffusion nozzle is connected to the lower end of the slit mixing pipe; and the discharging system, the air conveying system and the control system are fixed on the mounting bracket to form a modular structure. The micro powder spraying device realizes micro powder spraying through a slit air conveying principle, is simple in structure and low in cost, can be modularly disassembled and assembled, is easy to carry and integrate on various straw returning machines and tools, and has good practicability and universality.

Description

Technical Field

[0001] This utility model relates to the field of straw return technology, specifically to a device for precise spraying of powdered decomposing agent for direct straw return to the field. Background Technology

[0002] Straw decomposing agents are microbial agents mainly composed of fungi, actinomycetes, and bacteria. They accelerate straw decomposition and nutrient release. They are available in two main forms: liquid and powder / solid. Liquid decomposing agents can be sprayed using plant protection machinery, while powdered decomposing agents, due to their relatively low application rate (1-2 kg / acre), are currently mostly applied manually after being mixed with soil or other powdered materials to increase volume. This method suffers from low application precision and a lack of specialized equipment. Alternatively, powdered decomposing agents can be mixed with water to form a solution before spraying with plant protection machinery, but this requires adding water tanks and other components, increasing the load on the machinery and making the overall structure more complex. Therefore, designing a modular device capable of precisely spraying small amounts of powdered decomposing agents and integrating it into straw crushing and returning machines, rotary tillers, moldboard plows, and other straw direct returning machinery is of great significance for direct straw returning operations.

[0003] Powdered material spraying technology and equipment are mostly used in industrial fields. For example, patent CN118308546A provides a pulverized coal injection system to improve the stability of pulverized coal injection, continuously and stably injecting pulverized coal into the blast furnace; patent CN118726670A discloses a blast furnace dry-quenched coke powder injection device, in which gas blown into the air inlet pipe mixes the dry-quenched coke powder and pulverized coal before injecting them into the blast furnace through the injection pipe, solving the problem of inconvenient proportioning of dry-quenched coke powder and pulverized coal; patent CN211488269U uses a powder injection ball valve to control a certain amount of powder to enter the powder injection mixer, and achieves instantaneous powder injection by blowing air into the powder injection mixer through a powder injection quick plug; patent CN2217492241U sets a pollen conveying wheel in the air duct to achieve uniform pollen supply. In summary, these existing powdered material spraying technologies and equipment are mostly used in fixed industrial operating environments, with relatively complex structures and strong system integration, making it difficult to adapt to the integrated application needs of straw returning to the field. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a precision spraying device for direct straw return to the field using powdered decomposing agents. To achieve this objective, this invention employs a slotted air delivery principle and a modular design to solve problems such as uniform spraying of trace amounts of powdered decomposing agents and convenient installation of the spraying device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a precision spraying device for powdered decomposing agent for direct straw return to the field, including a material discharge system, a pneumatic conveying system, a mounting bracket, and a control system;

[0006] The discharge system includes a discharge motor, a discharge screw, a discharge pipe, a hopper, and a discharge pipe; the discharge screw is installed inside the discharge pipe and is driven to rotate by the discharge motor.

[0007] The air delivery system includes a fan, an air duct, a slit mixing pipe, and a diffuser nozzle; the fan is connected to one end of the air duct, the slit mixing pipe is vertically installed at the other end of the air duct, and the diffuser nozzle is connected to the lower end of the slit mixing pipe.

[0008] The material discharge system, pneumatic conveying system, and control system are fixed on the mounting bracket to form a modular structure.

[0009] Furthermore, the diameter of the discharge pipe is 20-30 mm smaller than the diameter of the slit mixing pipe.

[0010] Furthermore, the discharge pipe is inserted into the slit mixing pipe, and the distance between the discharge port of the discharge pipe and the axis of the air duct is 60-100mm.

[0011] Furthermore, the diffusion nozzle is flat, with an installation tilt angle of 30°-50°, an outlet gap width of 10-20mm, and a diffusion angle of 100°-150°.

[0012] Furthermore, the side plate of the hopper has an angle of 70°-80° with the horizontal plane.

[0013] Furthermore, the discharge screw has a pitch of 20mm, a gap of 4mm with the discharge pipe, an inner diameter of 20mm, and a filling factor of 0.4.

[0014] Furthermore, the discharge screw has 2mm wide shoulders on both sides of its shaft head, and the shaft head diameter is 17mm.

[0015] Furthermore, the control system is used to adjust the rotational speed of the discharge motor and the wind speed of the blower to achieve precise control of the spraying amount and wind speed.

[0016] Furthermore, the spraying device can be detachably installed on the straw returning machine, supporting single-module or multi-module combination use.

[0017] Furthermore, the slit mixing tube accelerates the airflow through a variable diameter structure, thereby improving the uniformity of dispersion of the powdered corrosive agent in the airflow.

[0018] The technical effects achieved by this utility model are as follows:

[0019] This invention achieves micro-powder spraying through the principle of slit-powder delivery. It has a simple structure, low cost, and can be modularly disassembled and assembled, making it easy to carry and integrate into various straw returning machinery. It has good practicality and versatility. Attached Figure Description

[0020] Figure 1 This is a slanted view schematic diagram of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the present invention installed and integrated on a straw rotary tillage and returning machine;

[0023] The diagram is labeled as follows: 1-Discharge system, 101-Discharge motor, 102-Discharge screw, 103-Discharge pipe, 104-Hopper, 105-Outlet pipe; 2-Exhaust system, 201-Fan, 202-Air duct, 203-Slit mixing pipe, 204-Diffuser nozzle; 3-Mounting bracket; 4-Control system. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figure 1 As shown in the figure, as a specific embodiment of this utility model, a precision spraying device for powdered decomposing agent for direct straw return to the field is disclosed, which can be used in the fields of straw return to the field and plant protection. The powder spraying device includes a material discharge system 1, an exhaust system 2, a mounting bracket 3, and a control system 4.

[0026] like Figure 2 As shown, the discharge system 1 includes a discharge motor 101, a discharge screw 102, a discharge pipe 103, a hopper 104, and a discharge pipe 105; the discharge screw 103 is installed in the discharge pipe 102 and is driven by the discharge motor 101 to rotate in a certain direction to discharge materials.

[0027] The air delivery system 2 includes a fan 201, an air duct 202, a slit mixing pipe 203, and a diffuser nozzle 204. The fan 201 is installed at one end of the air duct 202 to blow air into the duct and provide positive pressure airflow. The slit mixing pipe 203 is installed at the other end of the air duct 202 and is arranged perpendicular to the axis of the air duct 202. The diffuser nozzle 204 is installed at the lower end of the slit mixing pipe 203.

[0028] Depending on the specific installation requirements, the pipes are connected by appropriate joints.

[0029] The side plate of the hopper 104 forms an angle of 70°-80° with the horizontal plane, which is greater than the angle of repose of the corrosive agent powder, so that the powder can smoothly enter the discharge pipe 103.

[0030] The diameter of the discharge pipe 105 is 20-30 mm smaller than the diameter of the slit mixing pipe 203. When the airflow passes through the slit mixing pipe 203, the flow velocity increases due to the change in diameter, thereby improving the uniformity of the dispersion of the powdered decomposing agent in the airflow.

[0031] The discharge system 1 and the pneumatic conveying system 2 are fixedly installed on the mounting bracket 3 to form a functional module for the precise spraying of powdered decomposing agent. One or more modules can be assembled onto the straw returning machinery to meet the application requirements of the decomposing agent.

[0032] The control system 4 controls the speed of the discharge motor 101 and the wind speed of the fan 201, thereby achieving precise control of the amount of powdered decomposing agent sprayed and the wind speed control in the air duct 202.

[0033] The pitch and clearance of the discharge screw 103 are designed to be 20mm and 4mm respectively according to the target powder discharge volume, with an inner diameter of 20mm and a filling coefficient of 0.4. The shaft head has 2mm wide shoulders on both sides to position the inner ring of the bearing, and the shaft head diameter is 17mm.

[0034] The discharge pipe 105 is inserted into the slit mixing pipe 203 to a certain depth. The distance between the discharge port of the discharge pipe 105 and the axis of the air duct 202 is 60-100mm, which reduces the impact of airflow on the discharge of trace powdered decomposing agent. At the same time, the vortex formed above the discharge port further improves the dispersion uniformity of the powdered decomposing agent in the airflow.

[0035] The diffusion nozzle 204 is flat, with an installation angle of about 30°-50°, an outlet gap of 10-20mm, and a diffusion angle of 100°-150°, increasing the deposition area of ​​the powdered corrosive agent on the ground surface.

[0036] like Figure 3 As shown, the powdered decomposing agent precision spraying device can be easily integrated into a straw rotary tillage and returning machine, exhibiting good practicality and versatility. The spraying device is detachably installed on the straw returning implement and supports single-module or multi-module combination use.

[0037] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of this utility model and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. A precision spraying device for powdered decomposing agent used for direct straw return to the field, characterized in that, Includes a material discharge system (1), a pneumatic conveying system (2), a mounting bracket (3), and a control system (4); The discharge system (1) includes a discharge motor (101), a discharge screw (102), a discharge pipe (103), a hopper (104), and a discharge pipe (105); the discharge screw (102) is installed inside the discharge pipe (103) and is driven to rotate by the discharge motor (101); The air delivery system (2) includes a fan (201), an air duct (202), a slit mixing pipe (203), and a diffuser nozzle (204); the fan (201) is connected to one end of the air duct (202), the slit mixing pipe (203) is vertically installed at the other end of the air duct (202), and the diffuser nozzle (204) is connected to the lower end of the slit mixing pipe (203); The material discharge system (1), the pneumatic conveying system (2), and the control system (4) are fixed on the mounting bracket (3) to form a modular structure.

2. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 1, characterized in that, The diameter of the discharge pipe (105) is 20-30 mm smaller than the diameter of the slit mixing pipe (203).

3. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 2, characterized in that, The discharge pipe (105) is inserted into the slit mixing pipe (203), and the distance between the discharge port of the discharge pipe (105) and the axis of the air duct (202) is 60-100mm.

4. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 3, characterized in that, The diffuser nozzle (204) is flat, with an installation tilt angle of 30°-50°, an outlet gap width of 10-20mm, and a diffusion angle of 100°-150°.

5. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 4, characterized in that, The side plate of the hopper (104) has an angle of 70°-80° with the horizontal plane.

6. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 5, characterized in that, The discharge auger (102) has a pitch of 20 mm, a gap of 4 mm with the discharge pipe (103), an inner diameter of 20 mm, and a filling coefficient of 0.

4.

7. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 6, characterized in that, The discharge screw (102) has 2mm wide shoulders on both sides of the shaft head, and the shaft head diameter is 17mm.

8. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 7, characterized in that, The control system (4) is used to adjust the rotation speed of the discharge motor (101) and the wind speed of the blower (201) to achieve precise control of the spraying amount and wind speed.

9. The precision spraying device for powdered decomposing agent for direct straw return to the field as described in claim 8, characterized in that, The spraying device can be detachably installed on the straw returning machine and supports the use of single or multiple modules in combination.

10. The spraying device as described in claim 9, characterized in that, The slit mixing tube (203) accelerates the airflow through a variable diameter structure, thereby improving the uniformity of the dispersion of the powdered corrosive agent in the airflow.

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