A liquid manure spraying system suitable for a variety of land conditions

Abstract

This invention discloses a liquid manure spraying system suitable for various land conditions, comprising a flexible traction mechanism and a self-balancing application device. The flexible traction mechanism includes a traction motor, a control coil driven by the traction motor, and a flexible traction rope mounted on the control coil. The self-balancing application device includes a chassis, a spraying rod, and a rubber-plug nozzle. The chassis has a rubber tire structure and is connected to the flexible traction rope. During spraying, the flexible traction rope pulls the chassis upwards at an angle. A shock-absorbing structure is installed inside the chassis. The spraying rod includes a fixed rod and a telescopic rod. The fixed rod is fixedly mounted on the chassis and connected to a storage tank via a liquid inlet pipe. The lower end of the telescopic rod cooperates with the fixed rod, and the upper end is equipped with a rubber-plug nozzle. This invention can solve the problems of pipe blockage, uneven spraying, poor spraying effect, and intelligent farmland fertilization in existing equipment, promoting the development of agricultural fertilization towards a more intelligent, convenient, and precise direction.

Description

Technical Field

[0001] This invention relates to a liquid manure spraying system suitable for various land conditions, belonging to the field of modern agricultural technology and agricultural machinery technology. Background Technology

[0002] Returning high-quality liquid manure to the field is a crucial step in controlling manure pollution and achieving a green, low-carbon agricultural cycle. Traditional fertilization methods, such as manual fertilization, suffer from numerous drawbacks, including high labor intensity, high labor costs, and low fertilization efficiency. Furthermore, manual fertilization is prone to over- or under-fertilization, making it difficult to ensure uniform and accurate application, leading to localized areas of excessive or insufficient fertilization, increased risk of manure runoff, or poor fertilization results. The development of manure application machinery has alleviated these problems to some extent.

[0003] From an efficiency perspective, fertilization equipment needs to adapt to the rapid fertilization needs of farmland of different sizes. From a quality perspective, liquid manure equipment must achieve precise and uniform application based on factors such as land flatness, mechanical load-bearing capacity, and manure uniformity, reducing environmental pollution caused by improper fertilization. Therefore, the development of new liquid manure equipment must not only achieve precise control over the anti-clogging application of different liquid manures, but also enable rapid, uniform, and clog-free liquid manure application based on different terrain conditions, layout methods, and fertilizer application rates.

[0004] With the deepening of the global concept of sustainable agricultural development, significantly increasing the rate of liquid manure application to the field has become an important way to solve the source pollution from livestock and poultry farms and reduce the use of chemical fertilizers and pesticides. Traditional spraying equipment, due to unreasonable flow channel design, is unable to adapt to the high viscosity characteristics of liquid manure, resulting in frequent clogging of nozzles and pipes, low operating efficiency, and high maintenance costs. The concentration of nutrients such as nitrogen, phosphorus, and potassium in liquid manure varies significantly depending on factors such as raw material source and fermentation process. Existing equipment lacks real-time detection and dynamic control functions, making it difficult to achieve precise proportions and easily causing local over- or under-provisioning, affecting the uniformity of crop growth. Limited by the simple nozzle structure and insufficient fluid dynamics design, the uniformity of spraying coverage of existing equipment is generally less than 80% under complex terrain or wind speed changes. The low effectiveness of liquid manure application and high environmental pollution risk seriously affect the acceptance of its use by growers.

[0005] Despite breakthroughs in related technologies in recent years, significant technological bottlenecks still exist, such as:

[0006] 1. Insufficient Terrain Adaptability: Most patents employ fixed fertilization structures, with the fertilization equipment mounted on a transport vehicle. While this allows for uniform fertilization on perfectly flat soil, it becomes difficult to adapt and balance the equipment in complex terrains such as hills and slopes. This leads to variations in the spraying angle and uneven fertilization. For example, patent CN201810564189.5, a farmland fertilization device, uses a rigid support structure, resulting in a rigid connection between the traction device and the fertilizer. This limits the possibility of real-time dynamic adjustment of the fertilization amount and method, leading to significant fertilization deviations. Furthermore, in some arable lands, limited load-bearing capacity prevents machinery from entering the field or causes significant damage to the topsoil, hindering effective spraying operations.

[0007] 2. Poor spraying uniformity: Existing nozzle designs are mostly perforated structures, failing to consider factors such as the high content of particulate matter in liquid fertilizers and manures, and the significant changes in spraying fluid dynamics. For example, the intelligent fertilizer applicator control system patent CN202110123456.7 frequently experiences clogging and poor application uniformity.

[0008] 3. High operational difficulty: While fixed control modules are installed to perform mixing and filtering operations to prevent clogging (e.g., CN202322816926.5), the complex control systems and operating procedures are difficult to implement in rural areas and do not meet the requirements of different farmland conditions. Therefore, it is difficult to achieve practical application and large-scale deployment of this technology. Summary of the Invention

[0009] The purpose of this invention is to overcome the aforementioned problems of existing technologies and provide a liquid manure spraying system suitable for various land conditions. This invention can be adjusted according to the terrain and operational needs of different farmlands, and eliminates the need for transporting liquid manure vehicles to the fields. Through flexible traction and flexible adjustment of the fertilization device, it solves the problems of poor field adaptability, uneven spraying, pipe blockage, and lack of intelligent farmland fertilization capabilities associated with existing equipment.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] A liquid manure spraying system suitable for various land conditions includes a spraying vehicle and a storage tank on the spraying vehicle. Its features include a flexible traction mechanism and a self-balancing application device. The flexible traction mechanism includes a traction motor, a control coil driven by the traction motor, and a flexible traction rope mounted on the control coil. The self-balancing application device includes a chassis, a spraying rod, and a rubber-plug nozzle. The chassis has a rubber tire structure and is connected to the flexible traction rope. During spraying, the flexible traction rope pulls the chassis upwards at an angle. A shock-absorbing structure is installed inside the chassis. The spraying rod includes a fixed rod and a telescopic rod. The fixed rod is fixedly mounted on the chassis and connected to the storage tank via a liquid delivery pipe. The lower end of the telescopic rod cooperates with the fixed rod, and the upper end is equipped with a rubber-plug nozzle.

[0012] The flow channel formed inside the fixed rod includes an acceleration section, a compression section, and a jetting section in sequence. The cross-sectional area of ​​the acceleration section gradually decreases, the compression section adopts a venturi tube contraction-expansion structure, and the jetting section has a straight cylindrical structure.

[0013] The inner wall of the liquid inlet end of the spray section is provided with a turbulence-inducing element, which is a uniformly arranged protrusion or groove.

[0014] The spraying rod is fixedly mounted on the chassis by a three-legged spraying rod bracket, and the spraying rod is perpendicular to the chassis.

[0015] The fixed rod and the telescopic rod are connected by a threaded seal to form a telescopic structure.

[0016] The rubber plug nozzle has an inverted conical structure. The rubber plug nozzle is fixedly connected to the upper end of the telescopic rod by a three-legged nozzle bracket. The apex of the inverted conical structure is located inside the telescopic rod, and the gap between the telescopic rod and the inverted conical structure forms a spray channel.

[0017] The shock absorption structure includes multiple sets of spring assemblies evenly arranged inside the chassis. The upper and lower ends of each set of spring assemblies are connected to the buckles at the top and bottom of the chassis through hooks to form an elastic support structure.

[0018] The storage tank is equipped with a liquid level observation window on its side and a control device at the rear of the storage tank. The control device is used to control the operation of the traction motor and the water pump. The front of the storage tank is equipped with a liquid manure control valve, which is connected to the inlet of the fixed rod through a liquid delivery pipe.

[0019] The liquid storage tank is equipped with a flow meter and a flow sensor on its outlet pipe. The flow meter is used to measure the volume and mass of the fluid, and the flow sensor is used to detect changes in the flow of the medium through the pipe to determine the flow rate.

[0020] A weather sensor is installed on the top of the rubber stopper nozzle.

[0021] The advantages of using this invention are:

[0022] 1. The structure of this invention is relatively simple, but it solves many key problems in practical applications. For example, the control device controls the motor to operate, and the motor drives the control coil to rotate, thereby pulling the chassis through the flexible traction rope. This enables the retraction and movement control of the spraying rod. The linkage design between the chassis and the control coil, and the flexible traction rope using an upward traction method with its tilt angle matched to the terrain slope in real time, and the tension adjustment of the flexible traction rope through the control coil, ensure that the spraying rod is always perpendicular to the ground. This achieves the purpose of dynamic center of gravity adjustment and flexible traction, enabling stable operation in complex terrain. It can automatically adjust the center of gravity of the spraying rod according to the terrain slope, overcoming the influence of complex terrain such as undulations and continuous changes in hills and slopes on the vertical stability of the fertilizer applicator when it moves in the field, and avoiding uneven fertilization caused by tilting.

[0023] 2. The inclined traction design of this invention using a flexible traction rope can evenly distribute the weight load of the pipeline and spraying rod, preventing the device from tilting or jamming due to uneven ground or local subsidence. When pumping high-viscosity liquid manure, the pipeline has a large self-weight, and traditional rigid connections are prone to pipeline twisting or spraying rod displacement due to terrain changes. However, the flexible traction line adapts to terrain undulations through elastic deformation, and the algorithm of the control system precisely adjusts the traction speed to achieve uniform movement, thereby eliminating the difference in spraying volume caused by speed fluctuations.

[0024] 3. The shock absorption structure built into the chassis of this invention works in conjunction with dynamic traction to absorb the impact force brought by ground undulations, ensuring that the spraying rod remains stable during movement.

[0025] 4. The rubber stopper nozzle structure in this invention is specifically designed for the characteristics of liquid manure. It not only solves the problem of easy clogging of existing liquid manure nozzles, but also achieves uniform and large-area spraying with a fertilizer coverage uniformity of over 95%, significantly improving fertilizer utilization, reducing fertilizer waste, and promoting healthy and balanced crop growth.

[0026] 5. The internal flow channel of the fixed rod in the spraying rod of this invention is optimized by fluid mechanics to form a unique three-stage liquid extrusion structure. In the acceleration section, the cross-sectional area of ​​the flow channel gradually decreases, using the principle of fluid continuity to accelerate the flow of liquid manure and increase pressure. After entering the extrusion section, the flow channel adopts a venturi tube contraction-expansion structure, inducing turbulence through local low-pressure areas to promote full mixing of liquid manure and eliminate concentration differences. Subsequently, micro-turbulence elements (micro-protrusions or grooves) are set in the spraying section to further disrupt the laminar flow state and form uniform turbulence. This design allows the liquid manure to be in a highly uniform distribution state before reaching the nozzle. The spraying height of the liquid manure can be quickly adjusted by the telescopic rod. Combined with the elastic extrusion control of the rubber stopper nozzle, precise control of the annular spraying range can be achieved. Compared with traditional manual fertilization, the fertilization speed is greatly improved, and large-area farmland fertilization operations can be completed in a short time, saving manpower and time costs and greatly improving fertilization efficiency.

[0027] 6. This invention, through the linkage design of the control coil and the chassis with a rubber tire structure, can maintain equipment stability in complex terrains such as hills and terraces, avoiding the blind spots in operation caused by terrain limitations of traditional equipment.

[0028] 7. The chassis of this invention has a rubber tire structure. With the traction of the control coil, the equipment can be quickly transferred between different plots of land, reducing the speed of manual handling.

[0029] 8. The liquid manure spraying rod of the present invention has a relatively simple structure and can be adjusted according to the terrain and operational needs of different farmlands. It is suitable for various agricultural production scenarios such as small and medium-sized farmlands, orchards, and vegetable greenhouses.

[0030] 9. The spraying vehicle of this invention does not need to go into the field; it can complete the efficient and uniform application of liquid manure to various fields by traveling on the farm road. Attached Figure Description

[0031] Figure 1 This is a top view of the present invention;

[0032] Figure 2 This is a front view of the present invention;

[0033] Figure 3 This is a schematic diagram of the self-balancing application device of the present invention;

[0034] Figure 4 This is a schematic diagram illustrating the application of the present invention in spraying on slopes;

[0035] Figure 5 This is a schematic diagram of the internal flow channel structure of the fixed rod in this invention;

[0036] The diagram shows the following components: 1. Storage tank; 2. Liquid level observation window; 3. Control device; 4. Flow meter; 5. Flow sensor; 6. Valve; 7. Traction motor; 8. Control coil; 9. Infusion pipe; 10. Spraying rod; 11. Chassis; 12. Fixing rod; 13. Telescopic rod; 14. Rubber stopper nozzle; 15. Weather sensor; 16. Flexible traction rope; 17. Spraying vehicle; 18. Acceleration section; 19. Squeezing section; 20. Spraying section. Detailed Implementation

[0037] Example 1

[0038] A liquid manure spraying system suitable for various land conditions includes a spraying vehicle 17, a storage tank 1 on the spraying vehicle 17, a flexible traction mechanism, and a self-balancing application device. The flexible traction mechanism includes a traction motor 7, a control coil 8 driven by the traction motor 7, and a flexible traction rope 16 set on the control coil 8. The self-balancing application device includes a chassis 11, a spraying rod 10, and a rubber stopper nozzle 14. The chassis 11 has a rubber tire structure and is connected to the flexible traction rope 16. During spraying, the flexible traction rope 16 pulls the chassis 11 obliquely upward. A shock-absorbing structure is provided inside the chassis 11. The spraying rod 10 includes a fixed rod 12 and a telescopic rod 13. The fixed rod 12 is fixedly set on the chassis 11 and is connected to the storage tank 1 through a liquid infusion pipe 9. The lower end of the telescopic rod 13 cooperates with the fixed rod 12, and the upper end is equipped with a rubber stopper nozzle 14.

[0039] In this embodiment, the flow channel formed inside the fixed rod 12 includes an acceleration section 18, a squeezing section 19 and a jetting section 20 in sequence. The cross-sectional area of ​​the flow channel of the acceleration section 18 gradually decreases, the flow channel of the squeezing section 19 adopts a venturi tube contraction-expansion structure, and the jetting section 20 is a straight cylindrical structure.

[0040] In this embodiment, a turbulence element is provided on the inner wall of the liquid inlet end of the spray section 20. The turbulence element is a uniformly arranged protrusion or groove.

[0041] In this embodiment, the spraying rod 10 is fixedly mounted on the chassis 11 by a three-legged spraying rod 10 bracket, and the spraying rod 10 is perpendicular to the chassis 11.

[0042] In this embodiment, the fixed rod 12 and the telescopic rod 13 are connected by a threaded seal to form a telescopic structure.

[0043] In this embodiment, the rubber stopper nozzle 14 has an inverted conical structure. The rubber stopper nozzle 14 is fixedly connected to the upper end of the telescopic rod 13 by a nozzle bracket with a tripod structure. The apex of the inverted conical structure is located inside the telescopic rod 13, and the gap between the telescopic rod 13 and the inverted conical structure forms a spray channel.

[0044] In this embodiment, the shock absorption structure includes multiple sets of spring assemblies evenly arranged inside the chassis 11. The upper and lower ends of each set of spring assemblies are connected to the buckles at the top and bottom of the chassis 11 through hooks to form an elastic support structure.

[0045] In this embodiment, a liquid level observation window 2 is provided on the side of the liquid storage tank 1, and a control device 3 is installed at the tail of the liquid storage tank 1. The control device 3 is used to control the operation of the traction motor 7 and the water pump. A liquid manure control valve 6 is provided at the front of the liquid storage tank 1. The liquid manure control valve 6 is connected to the inlet of the fixed rod 12 through the infusion pipe 9.

[0046] In this embodiment, a flow meter 4 and a flow sensor 5 are installed on the outlet pipe of the liquid storage tank 1. The flow meter 4 is used to measure the volume and mass of the fluid, and the flow sensor 5 is used to detect the change of the medium flowing through the pipe to determine the flow rate.

[0047] In this embodiment, a weather sensor 15 is provided on the top of the rubber stopper nozzle 14. The control device 3 can adopt existing technology.

[0048] In this embodiment, after the fertilization device completes one scale of fertilization, the spraying vehicle 17 moves forward one station on the tillage road to complete the fertilization of the next scale of the field. After multiple superpositions, the overall uniform fertilization of irregular fields can be achieved.

[0049] Example 2

[0050] This invention can integrate existing smart agriculture technologies to further improve spraying efficiency. This embodiment, in conjunction with the accompanying drawings, provides a further explanation of the invention. Figure 1-5 As shown:

[0051] A liquid manure spraying system suitable for various land conditions includes a storage tank 1, a spraying rod 10, a self-balancing application device, a control device 3, and a power device. The storage tank 1 is used to store liquid manure. A liquid level observation window 2 is installed on the side of the storage tank 1. A control device 3 is installed at the tail of the storage tank 1. The control device 3 is used to control the operation of the traction motor 7 and the pump, and to control the liquid manure discharge rate. A flow meter 4 and a flow sensor 5 are installed in the pipeline storage pipe. A liquid manure control valve 6 is provided at the front of the storage tank 1. A pump is provided at the part connected to the storage tank 1. The traction motor 7 is operated by the control device 3 and connected to the control coil 8. The coil is connected to the tire structure chassis 11 at the bottom of the spraying rod 10 through a steel wire core nylon flexible traction rope 16. The bottom of the spraying rod 10 is connected to the valve 6 through an infusion pipe 9. The chassis 11 has a built-in spring shock absorption structure. A rubber stopper nozzle 14 is provided at the top of the spraying rod 10. A weather sensor 15 is installed at the top of the rubber stopper nozzle 14. The rubber stopper nozzle 14 is fixed to the top of the spraying rod 10 by a rubber strip. The spraying rod 10 includes a spiral rubber column telescopic rod 13, which can be adjusted up and down to adjust the range and distance of the ring fertilizer application. The chassis 11 is linked with the control coil 8, which can automatically adjust the center of gravity of the spraying rod 10 according to the terrain slope.

[0052] The storage tank 1 is made of high-strength, corrosion-resistant stainless steel, and its walls are optimized to balance structural strength and lightweight design. A liquid level observation window 2 is located at the rear of the storage tank, with high-precision etched graduations for easy and direct monitoring of the remaining liquid manure level. The top features a feed port with a threaded sealing cap and an embedded high-quality rubber sealing ring to ensure a tight seal and prevent leakage or evaporation of the liquid manure.

[0053] The spraying rod 10 is made of silicone rubber, combining flexibility and corrosion resistance. The internal flow channel of the fixed rod 12 within the spraying rod 10 is optimized for fluid dynamics, forming a unique three-stage liquid extrusion structure. In the acceleration section 18, the cross-sectional area of ​​the flow channel gradually decreases, utilizing the principle of fluid continuity to accelerate the flow of liquid manure and increase pressure. Upon entering the extrusion section 19, the flow channel adopts a venturi tube contraction-expansion structure, inducing turbulence through localized low-pressure zones to promote thorough mixing of the liquid manure and eliminate concentration differences. Subsequently, in the spraying section 20, micro-turbulence elements (micro-protrusions or grooves) are set to further disrupt the laminar flow, forming uniform turbulence. This design ensures that the liquid manure is highly uniformly distributed before reaching the nozzle. The spraying height of the liquid manure can be quickly adjusted via the telescopic rod 13, and combined with the elastic extrusion control of the rubber stopper nozzle 14, precise control of the annular spraying range can be achieved.

[0054] The self-balancing application device achieves stable operation in complex terrain through dynamic center of gravity adjustment and a flexible traction system. The flexible traction rope 16 adopts an upward traction method, and its tilt angle matches the terrain slope in real time. When the equipment moves in complex terrains such as hills and slopes, the flexible traction rope 16 adjusts the tension of the control coil 8 to ensure that the center of gravity of the spraying rod 10 is always perpendicular to the ground. The spring shock absorption structure built into the chassis 11 works in conjunction with the dynamic traction to absorb the impact force from ground undulations, ensuring that the spraying rod 10 remains stable during movement.

[0055] By incorporating modern smart agriculture technology, the control device 3 can be configured to include a dynamic concentration control module. A built-in liquid manure concentration sensor continuously monitors the nutrient concentration of the manure in the storage tank 1. The sensor employs near-infrared spectroscopy to quickly identify changes in the content of key components such as nitrogen, phosphorus, and potassium. The control system adjusts the speed of the traction motor 7 and the power of the water pump based on the preset target fertilization rate and the current detected concentration, achieving dynamic compensation for the dispensing speed. When the manure concentration increases, the system automatically reduces the spraying rate; when the concentration decreases, the rate increases, ensuring that the fertilization rate per unit area remains consistently within a very small error range. This control process requires no manual intervention; adjustments are made based on data feedback from the flow meter 4, combined with the height adjustment of the telescopic rod 13, ultimately achieving uniform spraying of liquid manure at different concentrations.

[0056] The rubber stopper nozzle 14 adopts a large-channel spraying device, which, in conjunction with the liquid extrusion structure of the internal flow channel of the fixed rod 12, ensures that the liquid manure is evenly dispersed when sprayed, forming a 360° annular spray surface, effectively preventing liquid manure residue from clogging.

[0057] The flow meter 4 and the flow sensor 5 are installed together on the outlet pipe. The flow meter 4 measures the volume and mass of the fluid, and the flow sensor 5 determines the flow rate by detecting changes in the medium flowing through the pipe. The two are installed together mainly to achieve more accurate flow measurement and control.

[0058] The specific implementation method of this invention includes four main stages: preliminary preparation, parameter setting, fertilization operation, and final finishing. Each stage is closely linked to ensure that the fertilization operation is completed efficiently, accurately, and safely. Details are as follows:

[0059] Preliminary Preparation: Check the liquid level observation window 2 on the side of the storage tank 1 to accurately determine the remaining amount of liquid manure according to the high-precision scale. If the remaining liquid manure is insufficient, open the filling port with a sealing cap on the top of the storage tank 1 and add an appropriate amount of liquid manure. After adding, ensure the sealing cap is tightened, and pay attention to ensuring the rubber sealing ring inside the sealing cap is properly fitted to prevent fertilizer leakage and volatilization. Perform a simple quality check on the liquid manure, observing whether its color, uniformity, etc., are normal, and avoid using fertilizer with problems such as sedimentation or deterioration. Select a suitable infusion tube 9, connecting one end to the drain port of the storage tank 1 and the other end to the inlet of the spraying rod 10. During the connection process, ensure that the quick connector is installed firmly. Since the infusion tube 9 adopts a double-layer structure, it can effectively prevent liquid manure leakage. After connection, you can gently pull the infusion tube 9 to check. Check the power of the traction motor 7. If the traction motor 7 uses solar charging and the power is insufficient, place the equipment in a sunny place to charge until the power meets the needs of this fertilization operation. Simultaneously, check whether the connection between the traction motor 7 and the control coil 8 is secure, and whether the connection between the control coil 8 and the bottom chassis 11 of the spraying rod 10 is normal. Perform preliminary debugging of the control device 3, press the switch button, and check whether the display screen lights up normally and displays various parameters. If the display screen does not display or displays abnormally, check whether the power connection and internal wiring of the control device 3 are loose or damaged. Check the rubber plug ring nozzle at the top of the spraying rod 10 to see if there is any debris or blockage on its surface. Since the nozzle is made of corrosion-resistant engineering plastic and the surface is finely polished, if there are slight stains, wipe it with a clean soft cloth. For the internal flow channel of the nozzle, use compressed air or clean water for simple flushing to ensure that the flow channel is unobstructed and to ensure that the subsequent liquid manure is evenly dispersed.

[0060] Parameter Setting: Determine the appropriate fertilizer application rate and range based on the farmland area, crop type, growth stage, and soil fertility. Refer to relevant agricultural technical materials or consult agricultural experts for scientifically sound fertilization advice. The operator moves to the end of the storage tank 1 and operates the control device 3. Using the adjustment buttons, set the parameters according to the calculated fertilizer application rate and range. During the setting process, closely monitor the parameter changes on the display screen to ensure accuracy. The fertilizer application rate is primarily set through a flow regulating valve and flow meter 4. The flow regulating valve allows manual adjustment of the liquid manure flow rate as needed, while the flow meter 4 provides real-time feedback on the current fertilizer flow rate for precise control by the operator. The fertilization range is set by rotating the spiral rubber column telescopic rod 13 on the fixed rod 12 to adjust its height. Each rotation changes the height of the spiral rubber column telescopic rod 13, thus altering the fertilizer coverage area. During adjustment, measuring tools can be used for auxiliary measurement to ensure the fertilization range meets expectations.

[0061] Fertilization Operation: After setting the parameters, confirm the equipment connection and parameter settings are correct, and press the switch button on the control device 3 to start the equipment. The traction motor 7 drives the control coil 8 to work, pulling the wear-resistant rubber tire-shaped chassis 11 at the bottom of the spraying rod 10 through the steel wire core nylon traction rope, so that the spraying rod 10 is smoothly moved to the working position by the operator along the preset path. During the movement, the spring shock absorption structure built into the chassis 11 works in conjunction with the dynamic traction of the control coil 8 to automatically adapt to the 0-30° slope terrain, ensuring that the spraying rod 10 remains vertically stable under complex ground conditions and avoiding uneven fertilization caused by tilting. When the spraying rod 10 reaches the target area, the operator can fine-tune the height of the spiral rubber column telescopic rod 13 through the adjustment button on the control device 3, and dynamically optimize the spraying range and liquid output speed by combining real-time wind speed, soil moisture and other sensor data. Under the action of the fluid dynamics optimized flow channel, the rubber plug nozzle 14 at the top of the spraying rod 10 forms a 360° annular spray surface with a coverage uniformity of ≥95%. During operation, liquid manure is transported from the storage tank 1 to the spraying rod 10 via the infusion pipe 9. The nozzle automatically adjusts the spray diffusion angle based on preset parameters and environmental feedback to ensure uniform fertilizer distribution. During continuous operation, the spraying rod 10 moves in segments via a linkage design between the chassis 11 and the control coil 8: after completing spraying in the current area, the operator activates the traction mechanism via the control device 3, causing the chassis 11 to roll along the rows of farmland, moving the spraying rod 10 at a uniform speed to the next work point. The moving speed and liquid output rate are precisely matched via a PLC algorithm to avoid repeated or missed spraying. Simultaneously, the display screen shows the flow meter 4 data and the remaining liquid in the storage tank 1 in real time. If the flow deviation exceeds ±5%, the system automatically triggers an alarm and pauses operation, resuming only after manual calibration. For irregular plots, the movement path of the spraying rod 10 can be flexibly adjusted by manually operating the direction buttons on the control device 3, and the height adjustment function of the telescopic rod 13 can dynamically adapt to the fertilization needs of the boundary areas. Throughout the operation, the meteorological sensor 15 continuously monitors environmental changes. If the wind speed exceeds 3 m / s, the system automatically reduces the spraying range and lowers the liquid pressure to reduce fertilizer drift and ensure that the uniformity always meets the standards.

[0062] Post-fertilization cleanup: After the entire farmland fertilization operation is completed, press the switch button on control device 3 to stop the equipment. At this time, the traction motor 7 stops rotating, and the liquid manure stops flowing. First, disconnect the infusion pipe 9 from the drain port of storage tank 1 and the inlet of spray rod 10, and place it properly in the designated location to avoid twisting or damage. Rinse spray rod 10 repeatedly with clean water to remove fertilizer residue inside and on the surface. Inspect storage tank 1; if there is residual fertilizer, decide whether to continue storing it or dispose of it based on the actual situation. At the same time, rinse storage tank 1 briefly with clean water to prevent fertilizer residue from corroding the tank. Organize spray rod 10, control device 3, and other components, and store them according to the prescribed storage method. Inspect all connections and parts of the equipment; if any are loose or damaged, tighten or replace them promptly. Perform regular maintenance on traction motor 7 and control device 3, such as cleaning the casing and checking the circuit, to ensure that the equipment can operate normally the next time it is used.

[0063] By implementing the detailed methods described above, the advantages of this simple liquid manure spraying system can be fully utilized to achieve efficient, precise, and uniform fertilization operations, while extending the service life of the equipment.

Claims

1. A liquid manure spraying system suitable for various land conditions, comprising a spraying vehicle (17) and a storage tank (1) on the spraying vehicle (17), characterized in that: It also includes a flexible traction mechanism and a self-balancing application device. The flexible traction mechanism includes a traction motor (7), a control coil (8) driven by the traction motor (7), and a flexible traction rope (16) set on the control coil (8). The self-balancing application device includes a chassis (11), a spraying rod (10), and a rubber plug nozzle (14). The chassis (11) is a rubber tire structure. The chassis (11) is connected to the flexible traction rope (16). During spraying, the flexible traction rope (16) pulls the chassis (11) upward at an angle. The chassis (11) is equipped with a shock-absorbing structure. The spraying rod (10) includes a fixed rod (12) and a telescopic rod (13). The fixed rod (12) is fixedly set on the chassis (11). The fixed rod (12) is connected to the storage tank (1) through the infusion pipe (9). The lower end of the telescopic rod (13) is connected to the fixed rod. The fixed rod (12) is fitted with a rubber plug nozzle (14) at the upper end; the rubber plug nozzle (14) has an inverted conical structure and is fixedly connected to the upper end of the telescopic rod (13) through a three-legged nozzle bracket. The apex of the inverted conical structure is located inside the telescopic rod (13), and the gap between the telescopic rod (13) and the inverted conical structure forms a spray channel; the shock absorption structure includes multiple sets of spring assemblies evenly arranged inside the chassis (11). The upper and lower ends of each set of spring assemblies are connected to the buckles at the top and bottom of the chassis (11) through hooks to form an elastic support structure; during the movement, the shock absorption structure built into the chassis (11) and the dynamic traction of the control coil (8) work together to automatically adapt to the 0-30° slope terrain and ensure that the spraying rod (10) remains vertically stable under complex ground conditions.

2. The liquid manure spraying system suitable for various land conditions according to claim 1, characterized in that: The flow channel formed inside the fixed rod (12) includes an acceleration section (18), a squeezing section (19) and a jetting section (20) in sequence. The cross-sectional area of ​​the flow channel of the acceleration section (18) gradually decreases. The flow channel of the squeezing section (19) adopts a contraction-expansion structure of a Venturi tube. The jetting section (20) is a straight cylindrical structure.

3. A liquid manure spraying system suitable for various land conditions according to claim 2, characterized in that: The inner wall of the liquid inlet end of the spray section (20) is provided with a turbulence element, which is a uniformly arranged protrusion or groove.

4. A liquid manure spraying system suitable for various land conditions according to claim 3, characterized in that: The spraying rod (10) is fixedly mounted on the chassis (11) by a three-legged spraying rod (10) bracket, and the spraying rod (10) is perpendicular to the chassis (11).

5. A liquid manure spraying system suitable for various land conditions according to claim 4, characterized in that: The fixed rod (12) and the telescopic rod (13) are connected by a threaded seal to form a telescopic structure.

6. A liquid manure spraying system suitable for various land conditions according to claim 5, characterized in that: The storage tank (1) is provided with a liquid level observation window (2) on the side and a control device (3) is installed at the tail of the storage tank (1). The control device (3) is used to control the operation of the traction motor (7) and the water pump. The storage tank (1) is provided with a liquid manure control valve (6) at the front. The liquid manure control valve (6) is connected to the inlet of the fixed rod (12) through the infusion pipe (9).

7. A liquid manure spraying system suitable for various land conditions according to claim 6, characterized in that: The liquid storage tank (1) is equipped with a flow meter (4) and a flow sensor (5) on the outlet pipe. The flow meter (4) is used to measure the volume and mass of the fluid, and the flow sensor (5) is used to detect the change of the medium flowing through the pipe to determine the flow rate.

8. A liquid manure spraying system suitable for various land conditions according to claim 7, characterized in that: A weather sensor (15) is installed on the top of the rubber plug nozzle (14).

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