A windbreak and sand-resistant soil crust spraying device

Abstract

This invention belongs to the technical field of desertification ecological restoration equipment, and particularly relates to a windbreak and sand-resistant soil crust spraying device. Addressing the problems of isolated functional modules, lack of coordination, and susceptibility to material disturbance and insufficient pretreatment in windy and sandy environments, the invention proposes the following solution: a spraying base plate and a spraying mechanism integrated thereon. The spraying mechanism includes a microbial agent spraying component, a water-retaining agent spraying component, and a seeding component arranged sequentially along the direction of travel. A square-shaped windproof cover is provided on the outside of the spraying area, along with a microenvironment air curtain component. Air is drawn in through micro-intake holes on the windproof cover and then forms a downward-facing adjustable isolation air curtain from the bottom air outlet, preventing material dispersion. This invention, through deep integration of sequential spraying, targeted mixing, environmental control, and intelligent linkage, solves the problems of single function, easy material failure, and significant environmental interference in existing technologies, achieving the goal of efficient artificial biological soil crust construction in complex windy and sandy environments.

Description

Technical Field

[0001] This invention relates to a hydroseeding device, specifically a hydroseeding device for preventing wind erosion and soil crusting, belonging to the technical field of desertification ecological restoration equipment. Background Technology

[0002] Desertification control is a global ecological challenge, and bio-soil crust technology, due to its superior sand-fixing, fertilization, and stress-resistance capabilities, has become a key means of restoring fragile ecosystems. This technology aims to accelerate the colonization of cryptogams, mosses, and other cryptogams on the sandy surface through artificial methods, forming a stable "biological skin," thereby fundamentally curbing wind erosion and initiating ecological succession. Although there has been considerable research and practice in this field, existing technologies and equipment still have significant limitations in achieving efficient, precise, and large-scale artificial crust construction, restricting the reliability of restoration effects and improving engineering efficiency.

[0003] In existing technologies, such as the device for spraying soil crust biomaterials disclosed in CN210183839U, although it integrates functions such as ditching, leveling, compaction, and watering, its core is only physical material covering and fixing. It fails to integrate multiple ecological restoration links such as microbial agent activation, water-retaining agent application, and plant sowing, resulting in a single restoration effect and a lack of sustainability. Another example is the agricultural device disclosed in CN212970682U, which integrates broadcasting, tilling, and spraying. While it embodies the concept of functional integration, its design is geared towards agricultural soil improvement and does not consider the special conditions of desert sandy areas and the sensitivity of biomaterials, lacking effective measures to cope with wind and sand environments. Secondly, there are shortcomings in the material pretreatment and storage stages. Bio-initiatives are prone to precipitation and inactivation during storage, and water-retaining agent polymer solutions are prone to gelation and clumping. This directly leads to uneven spraying, nozzle clogging, and seriously affects the effectiveness of the restoration materials and the stability of the equipment. Although the scientific community has recognized this problem and explored technical pathways from liquid spraying to solid inoculants to improve transportation and preservation performance, there is still a lack of efficient and low-power dedicated solutions for real-time, active maintenance and mixing of materials inside mobile equipment. This is especially true for inoculants containing active microorganisms, where the shear force generated by traditional mechanical mixing can easily cause irreversible damage to their activity. For highly viscous, easily agglomerated water-retaining agent solutions, conventional mixing struggles to achieve rapid and uniform hydration and prevent clumping. Furthermore, the field operating environment is extremely harsh, with wind and sand interference being a major cause of remediation failures. Strong winds not only scatter expensive inoculants and seeds, rendering the operation inaccurate, but also dry out the sand surface, severely threatening the initial colonization and survival of pioneer organisms such as cyanobacteria. Existing spraying devices often lack effective means of isolating and controlling the operating environment, making the remediation effect highly dependent on calm weather, greatly limiting the operating window and project reliability. Finally, the various functional modules often operate in isolation, lacking coordination. The application of microbial agents, water-retaining agents, and seeds must follow a strict ecological sequence and spatial logic. For example, a biological matrix layer should be formed first, then moisture conditions should be improved, and finally plant seeds should be introduced to achieve synergistic effects. Existing technologies and equipment fail to deeply link subsystems such as material pretreatment, sequential spraying, and environmental control through intelligent mechanical and control systems, thus failing to form a complete process flow. This results in high levels of manual intervention, poor process consistency, and unstable remediation results. Summary of the Invention

[0004] This invention provides a windbreak and sand-resistant soil crust spraying device to address the problems of isolated functional modules and lack of coordination in existing devices, as well as the susceptibility of materials to interference and insufficient pretreatment in windy and sandy environments.

[0005] The present invention achieves the above objectives through the following technical solution: a windbreak and sand-resistant soil crust spraying device, comprising a spraying mechanism, wherein the spraying mechanism comprises a fungicide spraying component, a water-retaining agent spraying component, and a seeding component arranged sequentially along the travel direction of the device;

[0006] The microbial agent spraying assembly is equipped with a circulating suction plate. The circulating flow path of the microbial agent is as follows: the microbial agent in the microbial agent spraying assembly is drawn out from the bottom of the tank, and then the drawn-out microbial agent is sprayed back into the assembly to disturb the sediment. The water-retaining agent spraying assembly is rotatably connected with curved stirring blades that continuously perform forward and reverse shearing and stirring. The seeding assembly includes a tree-shaped diversion pipe with multiple parallel discharge ports.

[0007] The bottom spraying section of the hydroseeding mechanism is covered with a windproof cover. The windproof cover is equipped with a microenvironment air curtain assembly. The microenvironment air curtain assembly forms an adjustable isolation air curtain below the windproof cover by blowing out air. The microenvironment air curtain assembly includes an annular air inlet chamber and an annular air outlet chamber opened inside the windproof cover. An air pump is fixedly connected to the inner wall of the windproof cover. An air inlet pipe is connected between the air inlet end of the air pump and the upper end of the annular air inlet chamber. An exhaust pipe is connected between the air outlet end of the air pump and the annular air outlet chamber. Several air inlet micro-holes connected to the annular air inlet chamber are opened on the outer wall of the windproof cover. Several air outlet holes connected to the annular air outlet chamber are opened on the bottom edge of the windproof cover. The airflow velocity of the air outlet holes is configured to be lower than the sand grain starting wind speed threshold.

[0008] A synchronous drive assembly is provided between the microbial agent spraying assembly and the water-retaining agent spraying assembly. The synchronous drive assembly includes an electric push rod, a synchronously driven hydraulic transmission unit, and a meshing transmission unit. The hydraulic transmission unit of the synchronous drive assembly includes a bottom cylinder and a hydraulic piston rod. The meshing transmission unit of the synchronous drive assembly includes a meshing linear rack and a transmission gear. A circulation pipeline connects the bottom cylinder and the circulating suction plate. A stirring shaft is coaxially and fixedly connected between the transmission gear and the curved stirring blade. The linear rack is located on the rod of the hydraulic piston rod. The hydraulic transmission unit and the meshing transmission unit are synchronously driven by the same electric push rod to move the hydraulic piston rod.

[0009] As a further embodiment of the present invention, the device also includes a spraying base plate, the upper surface of which is fixedly connected to a protective shell, the protective shell covering the outside of the spraying mechanism, and tracked wheels connected to both sides of the lower surface of the spraying base plate.

[0010] As a further embodiment of the present invention: the upper surface of the spraying base plate is also integrated with a storage battery and a controller, and the top of the protective shell is fixedly connected with a traveling camera and a wind sensor. The storage battery is electrically connected to each electrical component, and the controller is signal connected to each electrical component. The controller dynamically adjusts the airflow speed in the microenvironment air curtain assembly according to the feedback signal from the wind sensor.

[0011] As a further embodiment of the present invention: the microbial agent spraying assembly includes a microbial agent storage tank, which is fixedly connected to the spraying base plate by a support leg. The upper end of the microbial agent storage tank is connected to a microbial agent injection pipe, and the body of the microbial agent injection pipe penetrates the top shell of the protective housing. A circulating suction disc is embedded in the bottom of the microbial agent storage tank, and the disc body of the circulating suction disc has several liquid outlet holes. The bottom end of the circulating suction disc is connected to a circulating pipeline. The water-retaining agent spraying assembly includes a water-retaining agent storage tank, which is fixedly connected to the spraying base plate by a support leg. The upper end of the water-retaining agent storage tank is connected to a water-retaining agent injection pipe, and the body of the water-retaining agent injection pipe penetrates the top shell of the protective housing. The bottom end of the water-retaining agent storage tank is rotatably connected to a stirring shaft. The curved stirring blades are fixedly connected to the shaft body of the stirring shaft located inside the water-retaining agent storage tank in a centrally symmetrical manner. Both sides of the curved stirring blades are connected to multiple protruding shear ribs.

[0012] As a further embodiment of the present invention: both the bacterial agent storage tank and the water-retaining agent storage tank are individually equipped with spray pipes. The upper end of the spray pipe is connected to an infusion hose, and the lower end of the spray pipe is connected to several equally spaced nozzles. The bottom wall of the bacterial agent storage tank is connected to a bacterial agent pump. The other end of the infusion hose connected to one of the spray pipes is connected to the outlet of the bacterial agent pump. The bottom wall of the water-retaining agent storage tank is connected to a water-retaining agent pump, and the other end of the infusion hose connected to the other spray pipe is connected to the outlet of the water-retaining agent pump.

[0013] As a further embodiment of the present invention: the seeding component includes a seed bin and a distribution bin. The seed bin is fixedly connected to the spraying base plate, and the tree-shaped diverter is fixedly connected to the distribution bin. The spraying base plate has an installation positioning groove. The bottom end of the distribution bin is fixedly placed in the installation positioning groove. A seed delivery pipe is connected between the bottom end of the seed bin and the upper inlet of the tree-shaped diverter. A negative pressure seed delivery pump is installed on the body of the seed delivery pipe.

[0014] The top of the seed bin is connected to a seed filling tube, and the tube body penetrates the top shell of the protective housing. The bottom of the seed bin is provided with a bottom slope, and the connection point between the seed delivery tube and the seed bin is located at the inclined bottom end of the bottom slope.

[0015] As a further embodiment of the present invention: the windproof cover is square in shape, and two layers of sealing brushes are connected to the bottom of the windproof cover. The air outlet is located between the two layers of sealing brushes. A cross-shaped slit diaphragm is connected inside each air outlet. The airflow velocity from the air outlet is 0.5-1.5m / s.

[0016] As a further embodiment of the present invention: the side wall of the windproof cover is connected to a debris discharge door plate, the outer side wall of the annular air intake chamber is provided with a debris discharge groove, the upper end of the debris discharge door plate is rotatably connected in the debris discharge groove, the lower end of the debris discharge door plate is limited and locked in the debris discharge groove, the body of the exhaust pipe is connected to an electromagnetic reversing valve, the electromagnetic reversing valve is also connected to a backflush pipe, the other end of the backflush pipe is connected to the bottom end of the annular air intake chamber, a guide plate is connected in the annular air intake chamber, the installation position of the guide plate is level with the opening position of the air intake micro-hole, and the connection position of the backflush pipe in the annular air intake chamber is level with the connection position of the debris discharge door plate.

[0017] As a further embodiment of the present invention: a hydraulic piston is connected inside the bottom cylinder, and the hydraulic piston and the hydraulic piston rod are fixedly connected coaxially. The side wall of the bottom cylinder is connected to an inlet pipe and an outlet pipe. An inlet check valve is connected to the body of the inlet pipe, and an outlet check valve is connected to the body of the outlet pipe. A three-way directional valve is connected to the docking part of the inlet pipe, the outlet pipe, and the circulation pipe. The hydraulic piston rod is fixedly connected to the hydraulic piston. The inlet check valve, the outlet check valve, and the three-way directional valve are all standard hydraulic components, forming a closed hydraulic circuit for driving the circulating suction disc to circulate and pump.

[0018] As a further embodiment of the present invention: the transmission gear and the stirring shaft are coaxially and fixedly connected to the shaft body at the bottom of the water-retaining agent storage tank. The synchronous drive assembly also includes an electric push rod. The outer shell of the electric push rod is fixedly connected to the spraying base plate, and the telescopic end of the electric push rod is coaxially and fixedly connected to the hydraulic piston rod.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention comprises a microbial agent spraying component, a water-retaining agent spraying component, and a sowing component arranged sequentially along the device's travel direction. These components sequentially spray the microbial substrate layer, apply moisture conditions, and sow the plants, simulating the initial process of natural soil formation. This ensures that each step creates an optimal environment for the next, avoiding the potential inhibition of microbial activity by the high-permeability environment of the water-retaining agent and the problem of seeds being encased in a viscous solution, which affects germination, in traditional mixed spraying. The microbial agent is gently covered to form a biofilm, the water-retaining agent penetrates to an effective depth under medium pressure, and the seeds are precisely sown at the optimal surface position, thereby improving the success rate of soil crust formation and establishment. The application rate and coverage overlap of the three steps can be simultaneously controlled by the single variable of travel speed, ensuring operational consistency.

[0021] 2. The microbial agent spraying component of this invention is equipped with a circulating suction plate. The circulating suction plate circulates the microbial agent from the bottom of the tank, and then sprays the extracted microbial agent back into the component to disturb the sediment. The water-retaining agent spraying component is rotatably connected to a curved stirring blade with continuous forward and reverse shearing. The sowing component includes a tree-shaped distribution pipe with multiple parallel discharge ports. To address the differences in material characteristics between the microbial agent spraying component and the water-retaining agent spraying component, a circulating suction plate and a curved stirring blade with continuous forward and reverse shearing are designed respectively. For the microbial agent in the microbial agent spraying component, the circulating suction plate can disturb the area at the bottom of the tank most prone to sedimentation. By sucking the liquid from the bottom of the tank and re-spraying it back into the tank, the static sedimentation balance caused by the gravity of the microorganisms is broken. Compared with traditional top agitators, this method has lower energy consumption and less mechanical shear damage to the microorganisms, making it particularly suitable for protecting bioactive materials sensitive to shear force and ensuring a high concentration of microbial solution sprayed throughout the process. Consistency is ensured to avoid the problem of bacterial agent failure in the later stage of spraying due to sedimentation, and to ensure the uniformity of biological crust development. For the water-retaining agent in the water-retaining agent spraying component, the curved stirring blades and shear ribs can generate strong three-dimensional turbulence and local high shear force field. The fluid dynamics design of the arc surface can efficiently push the liquid in both forward and reverse directions, while the raised shear ribs are used to tear and disperse the agglomerates that the water-retaining agent polymer is prone to form in the early stage of water contact, preventing excessive local entanglement of polymer chains, ensuring that the water-retaining agent can be pumped and sprayed in the form of a fully hydrated uniform colloidal solution, so that its water-retaining performance can be fully exerted, and eliminating the risk of nozzle clogging due to undissolved particles. The tree-shaped diversion pipe can almost perfectly divide the seed flow from a single inlet into multiple independent sub-flows, which are then spread out through parallel outlets to ensure the consistency of seed density in the sowing width direction. Combined with the stable suction of the negative pressure seed pump to supply the seed flow, it can adapt to the precision sowing of various seed forms.

[0022] 3. The bottom spraying section of the spraying mechanism of this invention is covered with a windproof cover. The windproof cover has a microenvironment air curtain assembly. The microenvironment air curtain assembly forms an adjustable isolation air curtain below the windproof cover by blowing out airflow. The microenvironment air curtain assembly includes an annular air inlet chamber and an annular air outlet chamber opened inside the windproof cover. An air pump is fixedly connected to the inner wall of the windproof cover. An air inlet pipe is connected between the air inlet end of the air pump and the upper end of the annular air inlet chamber. An exhaust pipe is connected between the air outlet end of the air pump and the annular air outlet chamber. The outer wall of the windproof cover has several air inlet micro-holes connected to the annular air inlet chamber. The bottom edge of the windproof cover has several air outlet holes connected to the annular air outlet chamber. The microenvironment air curtain assembly draws air from the windproof cover and sprays it out from the bottom in the form of an air curtain, forming a continuous... The downward-flowing airflow barrier effectively deflects and resists the intrusion of external crosswinds, isolating the work area from the external environment. This ensures that the microbial agent droplets, water-retaining agent droplets, and lightweight seeds settle in calm air, solving the problems of severe material drift, waste, and uneven distribution in windy and sandy environments caused by traditional spraying. Furthermore, the power of the air pump can be dynamically adjusted based on real-time data from the wind sensor, thereby changing the flow rate and density of the air curtain. In windless conditions, it operates in energy-saving mode to maintain basic sealing, while in strong winds, it operates at full power to ensure the shielding effect. In addition, the downward-flowing air curtain effectively suppresses floating dust around the work site when it contacts the sand surface, preventing it from being stirred up and contaminating the material to be covered. In particular, this invention, through optimized design, controls the airflow velocity from the outlets to between 0.5-1.5 m / s. This wind speed range is much lower than the starting wind speed of desert surface sand (usually 5m / s). Therefore, the downward air curtain will not disturb the sand surface or raise dust. Instead, it can form a stable air cushion when it comes into contact with the sand surface, effectively suppressing the dust around the work site and preventing external wind and sand from intruding, creating a calm and clean micro-settling environment for the sprayed material.

[0023] 4. The present invention provides a synchronous drive assembly between the microbial agent spraying component and the water-retaining agent spraying component. The synchronous drive assembly includes an electric push rod, a synchronously driven hydraulic transmission unit, and a meshing transmission unit. The hydraulic transmission unit of the synchronous drive assembly includes a bottom cylinder and a hydraulic piston rod. The meshing transmission unit of the synchronous drive assembly includes a meshing linear rack and a transmission gear. A circulation pipeline connects the bottom cylinder and the circulating suction plate. A stirring shaft is coaxially and fixedly connected between the transmission gear and the curved stirring blade. The linear rack is located on the body of the hydraulic piston rod. The hydraulic transmission unit and the meshing transmission unit... The unit is synchronously driven by the movement of a hydraulic piston rod propelled by a single electric actuator. The synchronous drive assembly uses the linear motion of the electric actuator to simultaneously drive two completely different types of hydraulic transmission units and meshing transmission units, ensuring the synchronicity of the two stirring actions. That is, while the bacterial agent in the bacterial agent spraying component is being circulated and flushed, the water-retaining agent in the water-retaining agent spraying component is also undergoing shear stirring. Furthermore, the hydraulic transmission unit used to drive the bacterial agent circulation uses standard hydraulic components for its inlet check valve, outlet check valve, and three-way directional valve, forming a mature, reliable, and easy-to-maintain closed-loop structure. Compared to complex mechanical transmission stirring structures, this hydraulic circuit achieves liquid circulation through the reciprocating motion of the hydraulic piston, not only providing low shear force protection for the bacteria but also exhibiting higher operational stability and a lower failure rate due to its standardized components, thus solving the problem of equipment reliability under complex operating conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the protective shell of the present invention;

[0026] Figure 3 This is a schematic diagram of the connection structure between the microbial agent spraying component and the water-retaining agent spraying component of the present invention;

[0027] Figure 4 This is a schematic cross-sectional view of the microbial agent spraying component of the present invention;

[0028] Figure 5 This is a schematic cross-sectional view of the water-retaining agent spraying component of the present invention;

[0029] Figure 6 This is a schematic diagram of the seeding component structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the distribution compartment of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of the seed bin of the present invention;

[0032] Figure 9 This is a schematic diagram of the cross-sectional structure of the spray pipe of the present invention;

[0033] Figure 10 This is a schematic diagram of the windproof cover structure of the present invention;

[0034] Figure 11 This is a schematic diagram of the cross-sectional structure of the microenvironment air curtain assembly in the air extraction state of the present invention;

[0035] Figure 12 This is a schematic diagram of the cross-sectional structure of the microenvironment air curtain component in the state of debris removal according to the present invention;

[0036] Figure 13 This is a schematic diagram of the synchronous drive component structure of the present invention.

[0037] In the diagram: 1. Spraying base plate; 11. Protective shell; 12. Tracked wheels; 13. Traveling camera; 14. Wind sensor; 15. Mounting positioning slot; 2. Inoculant storage tank; 21. Inoculant filling pipe; 22. Inoculant pump; 23. Circulating suction disc; 24. Circulation pipeline; 25. Liquid outlet; 3. Water-retaining agent storage tank; 31. Water-retaining agent filling pipe; 32. Water-retaining agent pump; 33. Agitator shaft; 34. Curved agitator blades; 35. Shearing ribs; 4. Seeding assembly; 41. Seed bin; 42. Distribution bin; 43. Seed delivery pipe; 44. Seed filling pipe; 45. Tree-shaped diversion pipe; 46. Bottom slope; 47. Negative pressure seed delivery pump; 5. Battery; 6. Controller; 7. Spraying pipe; 71. 72. Nozzle; 8. Infusion hose; 9. Windproof cover; 10. Air inlet micro-hole; 11. Waste discharge door panel; 12. Annular air inlet chamber; 13. Annular air outlet chamber; 14. Air outlet; 15. Cross-shaped slit diaphragm; 16. Air pump; 17. Air inlet pipe; 18. Exhaust pipe; 19. Electromagnetic reversing valve; 10. Backflush pipe; 10. Sealing brush; 11. Flow guide plate; 12. Waste discharge trough; 13. Synchronous drive assembly; 14. Bottom cylinder; 15. Hydraulic piston rod; 16. Electric push rod; 17. Linear rack; 18. Transmission gear; 19. Hydraulic piston; 10. Inlet check valve; 10. Outlet check valve; 11. Three-way reversing valve. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figures 1 to 13As shown, a windbreak and sand-resistant soil crust spraying device includes a spraying mechanism, which comprises a microbial agent spraying component, a water-retaining agent spraying component, and a sowing component 4 arranged sequentially along the device's travel direction. The device uses these components to sequentially spray the microbial substrate layer, moisture conditions, and plant planting, simulating the initial process of natural soil formation. This ensures that each step creates an optimal environment for the next, avoiding the potential inhibition of microbial agent activity by the high-permeability environment of the water-retaining agent in traditional mixed spraying, and the problem of seeds being encased in a viscous solution, affecting germination. The microbial agent is gently covered to form a biofilm, the water-retaining agent penetrates to an effective depth under medium pressure, and the seeds are precisely sown at the optimal surface position, thereby improving the success rate of soil crust establishment. The application rate and coverage overlap of the three steps can be controlled simultaneously using only the travel speed, ensuring operational consistency.

[0041] The microbial agent spraying assembly is equipped with a circulating suction disc 23. The circulating suction disc 23 circulates the microbial agent through the following path: it draws the microbial agent from the bottom of the tank and then sprays it back into the assembly to agitate and settle it. The water-retaining agent spraying assembly is rotatably connected to a curved stirring blade 34 that continuously performs forward and reverse shearing and stirring. The seeding assembly 4 includes a tree-shaped distribution pipe 45 with multiple parallel discharge ports. It should be noted that the circulating suction disc 23 realizes localized circulation suction and spraying of the liquid at the bottom of the tank of the microbial agent spraying assembly. The fluid shear force generated by this method is lower than that of direct stirring by a mechanical impeller. Stirring effectively prevents bacterial cell inactivation due to mechanical damage, while breaking the sedimentation equilibrium and ensuring uniform concentration. To address the differences in material characteristics between the bacterial agent spraying component and the water-retaining agent spraying component, a circulating suction disk 23 and a curved stirring blade 34 with continuous forward and reverse shearing were designed respectively. For the bacterial agent in the bacterial agent spraying component, the circulating suction disk 23 can disturb the area at the bottom of the tank most prone to sedimentation. By sucking the liquid from the bottom of the tank and re-spraying it back into the tank, the static sedimentation equilibrium caused by the bacteria's own gravity is broken. Compared with traditional top stirrers, this method has lower energy consumption and is less mechanically damaging to the bacteria. With less shear damage, it is particularly suitable for protecting bioactive materials that are sensitive to shear forces, ensuring a high degree of consistency in the concentration of the sprayed bacterial solution from start to finish, avoiding the problem of bacterial agent failure in the later stages of spraying due to sedimentation, and ensuring the uniformity of biocrust development; for the water-retaining agent in the water-retaining agent spraying component, the curved stirring blades 34, in combination with the shear ribs 35, can generate strong three-dimensional turbulence and local high shear force field. The fluid dynamics design of the curved surface can efficiently propel the liquid in both forward and reverse rotation, while the raised shear ribs 35 are used to tear and disperse the clumps that the water-retaining agent polymer easily forms in the early stages of contact with water. It prevents excessive local entanglement of polymer chains, ensuring that the water-retaining agent can be pumped and sprayed in the form of a fully hydrated, uniform colloidal solution, thereby maximizing its water-retaining performance and eliminating the risk of clogging the nozzle 71 due to undissolved particles. The tree-shaped diversion structure of the tree-shaped diversion pipe 45 can almost perfectly divide the seed flow from a single inlet into multiple independent sub-flows, which are then spread out through parallel outlets, ensuring consistent seed density in the sowing width direction. Combined with the stable suction of the negative pressure seed pump 47 to supply the seed flow, it can adapt to the precision sowing of various seed forms.

[0042] A windproof cover 8 is installed on the outer side of the bottom spraying section of the hydroseeding mechanism. A microenvironment air curtain assembly is installed on the body of the windproof cover 8. The microenvironment air curtain assembly forms an adjustable isolation air curtain below the windproof cover 8 through the airflow. The microenvironment air curtain assembly includes an annular air inlet chamber 83 and an annular air outlet chamber 84 opened within the body of the windproof cover 8. An air pump 87 is fixedly connected to the inner wall of the windproof cover 8. An air inlet pipe 8 connects the air inlet end of the air pump 87 to the upper end of the annular air inlet chamber 83. 8. An exhaust pipe 89 connects the air outlet of the air pump 87 to the annular air outlet chamber 84. The outer wall of the windproof cover 8 has several air inlet micro-holes 81 connected to the annular air inlet chamber 83. The bottom edge of the windproof cover 8 has several air outlet holes 85 connected to the annular air outlet chamber 84. The airflow velocity ejected from the air outlet holes 85 is configured to be lower than the sand particle initiation velocity threshold. It should be noted that the airflow from the microenvironment air curtain assembly is rectified into multiple uniform, downward-flowing streams. The low-speed, stable airflow, with its optimized overall wind speed, is sufficient to resist common crosswind interference without impacting the sand surface and stirring up dust. The microenvironment air curtain component draws air from the body of the windproof cover 8 and sprays it out from the bottom in the form of an air curtain, forming a continuously flowing airflow barrier. This effectively deflects and resists the intrusion of external crosswinds, isolating the work area from the external environment. This ensures that the microbial agent droplets, water-retaining agent droplets, and lightweight seeds settle in calm air, solving the problems of serious material drift, waste, and uneven distribution in windy and sandy environments caused by traditional spraying. It can also dynamically adjust the power of the air pump 87 based on real-time data from the wind sensor 14, thereby changing the flow rate and density of the air curtain. In the absence of wind, it operates in energy-saving mode to maintain basic sealing, and in strong winds, it operates at full power to ensure the shielding effect. In addition, the downward air curtain can effectively suppress the dust around the work point when it comes into contact with the sand surface, preventing it from being stirred up and contaminating the material to be covered.

[0043] A synchronous drive assembly 9 is provided between the microbial agent spraying assembly and the water-retaining agent spraying assembly. The synchronous drive assembly 9 includes an electric push rod 93 and a synchronously driven hydraulic transmission unit and a meshing transmission unit. The hydraulic transmission unit of the synchronous drive assembly 9 includes a bottom cylinder 91 and a hydraulic piston rod 92. The meshing transmission unit of the synchronous drive assembly 9 includes a meshing linear rack 94 and a transmission gear 95. A circulation pipe 24 is connected between the bottom cylinder 91 and the circulation suction plate 23. A stirring shaft 33 is coaxially fixedly connected between the transmission gear 95 and the curved stirring blade 34. The linear rack 94 is located on the rod of the hydraulic piston rod 92. The hydraulic transmission unit and the meshing transmission unit are synchronously driven by the same electric push rod 93 pushing the hydraulic piston rod 92. The synchronous drive assembly 9 uses the linear motion of the electric push rod 93 to simultaneously drive two completely different types of hydraulic transmission units and meshing transmission units, ensuring the synchronicity of the two stirring actions. That is, whenever the microbial agent in the microbial agent spraying assembly is circulated and flushed, the water-retaining agent in the water-retaining agent spraying assembly is also undergoing shearing and stirring.

[0044] Example 2

[0045] Improvements based on Example 1:

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, the device also includes a spraying base plate 1. A protective shell 11 is fixedly connected to the upper surface of the spraying base plate 1. The protective shell 11 covers the outside of the spraying mechanism. Tracked wheels 12 are connected to both sides of the lower surface of the spraying base plate 1. The spraying base plate 1 serves as the installation foundation to ensure the fixed assembly of each component. The protective shell 11 covers the spraying mechanism and can effectively resist the strong sunlight ultraviolet rays, wind and sand erosion, diurnal temperature differences and possible precipitation in desert areas. The tracked wheels 12 can easily cope with soft sand, dune slopes and local uneven terrain without serious sinking, ensuring smooth travel and continuous operation of the device on moving and semi-fixed dunes.

[0047] The upper surface of the hydroseeding base plate 1 also integrates a battery 5 and a controller 6. A traveling camera 13 and a wind sensor 14 are fixedly connected to the top of the protective housing 11. The battery 5 is electrically connected to each electrical component, and the controller 6 is signal-connected to each electrical component. Based on the feedback signal from the wind sensor 14, the controller 6 dynamically adjusts the airflow velocity in the microenvironment air curtain assembly. The battery 5 provides stable power to all electric components. The controller 6 achieves coordinated and precise control and status monitoring of each actuator. It can automatically coordinate the spraying sequence and dosage of fungicides, water-retaining agents, and seeds according to preset process parameters, controlling the air curtain intensity and reducing the professional skill requirements for operators. The traveling camera 13 can collect real-time images of the terrain ahead and the completed work area, providing a basis for possible path planning or respraying decisions. The wind sensor 14 can sense the external wind speed in real time and feed the signal back to the controller 6, achieving adaptive optimization of the air curtain intensity.

[0048] like Figures 1 to 5As shown, the microbial agent spraying assembly includes a microbial agent storage tank 2, which is fixedly connected to the spraying base plate 1 by support legs. The upper end of the microbial agent storage tank 2 is connected to a microbial agent injection pipe 21, and the pipe body of the injection pipe 21 penetrates the top shell of the protective housing 11. A circulating suction disc 23 is embedded in the bottom of the microbial agent storage tank 2, and the disc body of the circulating suction disc 23 has several liquid outlet holes 25. The bottom end of the circulating suction disc 23 is connected to a circulating pipeline 24; a water-retaining agent spraying assembly. The system includes a water-retaining agent storage tank 3, which is fixedly connected to the spraying base plate 1 via supports. A water-retaining agent injection pipe 31 is connected to the upper end of the storage tank 3, with the pipe body of the injection pipe 31 penetrating the top of the protective shell 11. A stirring shaft 33 is rotatably connected to the bottom of the storage tank 3. Curved stirring blades 34 are centrally symmetrically fixed to the shaft of the stirring shaft 33 located inside the storage tank 3. The curved stirring blades 34 are located on both sides of the stirring shaft. Each blade is connected to multiple raised shear ribs 35. It should be noted that when the circulating suction disk 23 extracts the liquid from the bottom of the tank and re-sprays it, it generates a high-flow-rate, low-shear velocity field suitable for disturbing the sediment. In view of the characteristics of easy sedimentation and inactivation of the bacterial agent, a gentle stirring method is adopted to avoid the harmful shear force that may be generated by mechanical vibration or stirring. The circulating suction disk forms a gentle jet at the bottom of the tank, which effectively prevents sedimentation while maximizing the protection of the biological activity of the bacterial agent. The circulating suction disk 23 is embedded in the bottom of the tank and connected through the circulation pipeline 24, and is directly deployed in the area with the highest risk of sedimentation, realizing targeted treatment. The circulating suction action can continuously activate the material at the bottom of the tank. The curved stirring blades 34 are arranged in a centrally symmetrical manner to ensure that a symmetrical flow field is generated in both forward and reverse rotation, resulting in high driving efficiency. The shear ribs 35 on both sides of the blades generate high shear force and produce violent relative motion with the liquid during rotation, which is used to break up the water-retaining agent lumps.

[0049] Furthermore, both the bacterial agent storage tank 2 and the water-retaining agent storage tank 3 are individually connected to spray pipes 7. The upper end of the spray pipe 7 is connected to an infusion hose 72, and the lower end of the spray pipe 7 is connected to several equally spaced nozzles 71. The bottom wall of the bacterial agent storage tank 2 is connected to a bacterial agent pump 22. The other end of the infusion hose 72 connected to one of the spray pipes 7 is connected to the outlet of the bacterial agent pump 22. The bottom wall of the water-retaining agent storage tank 3 is connected to a water-retaining agent pump 32, and the other end of the infusion hose 72 connected to another spray pipe 7 is connected to the outlet of the water-retaining agent pump 32. The infusion hose 72 serves as the pipeline connecting the pump and the spray pipe 7. Multiple nozzles 71 arranged at equal intervals on the 7-tube body achieve wide and uniform coverage. By controlling the start, stop and speed of the two delivery pumps respectively, the spray volume and spraying timing of the two liquids can be precisely and independently adjusted. It should be noted that the selection of nozzles 71, such as atomization angle and flow coefficient, can be independently selected and optimized according to the different characteristics of the bacterial agent and water-retaining agent, such as viscosity and surface tension. The nozzles 71 used for spraying bacterial agents can be wide-angle atomizing nozzles to achieve gentle full coverage, while the nozzles 71 used for spraying water-retaining agents can be solid cone or fan-shaped nozzles to increase penetration, so that each material can be applied to the sand surface in the most suitable physical form.

[0050] like Figure 2 , Figures 6 to 9 As shown, the sowing assembly 4 includes a seed bin 41 and a distribution bin 42. The seed bin 41 is fixedly connected to the spraying base plate 1, and the tree-shaped diverter pipe 45 is fixedly connected inside the distribution bin 42. The spraying base plate 1 has an installation positioning groove 15. The bottom end of the distribution bin 42 is fixedly clipped into the installation positioning groove 15. A seed delivery pipe 43 connects the bottom end of the seed bin 41 and the upper inlet of the tree-shaped diverter pipe 45. A negative pressure seed delivery pump 47 is installed on the body of the seed delivery pipe 43. The seed delivery pipe 43 connects the seed bin 41 and the tree-shaped diverter pipe 45. The negative pressure seed delivery pump 47 installed on its body adopts the principle of pneumatic conveying, which can generate a stable suction to suck the seeds from the bottom of the seed bin 41 and deliver them to the distribution bin 42. The delivery volume can be easily controlled by adjusting the negative pressure to achieve precision sowing. The distribution bin 42 is precisely clipped onto the spraying base plate 1 through the installation positioning groove 15, ensuring the fixed position of its outlet.

[0051] Furthermore, the top of the seed bin 41 is connected to a seed filling pipe 44, and the body of the seed filling pipe 44 penetrates the top shell of the protective shell 11. The bottom of the seed bin 41 is provided with a bottom slope 46. The connection between the seed delivery pipe 43 and the seed bin 41 is located at the inclined bottom end of the bottom slope 46. By utilizing the principle of gravity flow, the seeds can automatically gather at the inlet of the seed delivery pipe 43 at the lowest point, avoiding the seed residue problem that is easy to occur in flat-bottomed bins, ensuring that the seeds in the bin can be fully utilized, reducing waste and cleaning trouble.

[0052] like Figure 1 , Figure 10 , Figure 11 and Figure 12 As shown, the windproof cover 8 has a square shape. Two layers of sealing brushes 812 are connected to the bottom of the cover. Air outlets 85 are located between the two layers of sealing brushes 812. Each air outlet 85 has a cross-shaped diaphragm 86 connected inside. The airflow velocity from the air outlets 85 is 0.5-1.5 m / s. The square shape of the windproof cover 8 maximizes internal space utilization. The air pump 87 is fixed to the inner wall of the cover and is connected to the annular air inlet chamber 83 and the annular air outlet chamber 84 via the air inlet pipe 88 and the exhaust pipe 89, respectively, forming a short-path closed gas internal circulation pipeline. The two layers of sealing brushes 812 connected to the bottom of the windproof cover 8 form the first line of defense, adapting to the slight undulations of the sand surface and effectively isolating most of the air. The air outlet 85 is located between two layers of sealing brushes 812, which confines the ejected air curtain within the channel formed by the sealing brushes 812, enhancing the directionality of the airflow and reducing diffusion loss. The cross-shaped slit diaphragm 86 connected in each air outlet 85 can, on the one hand, organize the potentially turbulent airflow into more stable multiple fine streams, which helps to form a uniform and dense air curtain; on the other hand, the cross-shaped opening structure can close naturally when the pump stops working, preventing external sand and dust from flowing back into the annular air outlet chamber 84 through the air outlet. According to the principles of wind and sand physics, the starting wind speed of desert surface sand particles is usually around 5 m / s (measured at a height of 2 meters). Therefore, the airflow speed of 0.5-1.5 m / s is far below the starting threshold. The airflow barrier formed within this speed range is sufficient to effectively deflect and weaken common lateral working winds (typically <5m / s), ensuring that the sprayed material settles in calm air. At the same time, because it is lower than the wind speed that causes sand to rise, this downward air curtain not only does not blow up sand particles on the working surface, but also forms a stable air cushion when it comes into contact with the sand surface, effectively suppressing the floating dust that may be raised by mechanical movement or external wind disturbance, thus truly achieving the dual functions of isolation and protection, avoiding disturbance to the sand surface environment.

[0053] Furthermore, the side wall of the windproof cover 8 is connected to a debris discharge door plate 82, and the outer wall of the annular air intake chamber 83 is provided with a debris discharge groove 814. The upper end of the debris discharge door plate 82 is rotatably connected to the debris discharge groove 814, and the lower end of the debris discharge door plate 82 is limited and locked in the debris discharge groove 814. The body of the exhaust pipe 89 is connected to an electromagnetic reversing valve 810, which is also connected to a backflush pipe 811. The other end of the backflush pipe 811 is connected to the bottom end of the annular air intake chamber 83. A guide plate 813 is connected inside the annular air intake chamber 83. The installation position of the guide plate 813 is flush with the opening position of the air intake micro-hole 81. The connection position of the backflush pipe 811 in the annular air intake chamber 83 is flush with the connection position of the debris discharge door plate 82. When a negative pressure is generated in the annular air intake chamber 83 due to air extraction, the debris discharge door... Under air pressure, plate 82 will adhere tightly to the inner side of the impurity discharge groove 814 and operate normally. When cleaning is required, the impurity discharge door plate 82 is pushed open, allowing large particles of impurities to be discharged from here. The electromagnetic reversing valve 810 connects the exhaust pipe 89 and the annular air outlet chamber 84 to perform normal air curtain circulation. After a period of time, the controller 6 can control the electromagnetic reversing valve 810 to switch, so that the high-pressure airflow discharged by the air pump 87 is reversed and introduced into the bottom of the annular air intake chamber 83 through the back-blowing air pipe 811. The reverse high-speed airflow can powerfully blow the inner wall of the annular air intake chamber 83, the guide plate 813, and the inner side of the air intake micro-hole 81, raising the accumulated sand and dust and discharging it outside the cover through the impurity discharge groove 814, thus achieving automatic unblocking. The installation position of the guide plate 813 is flush with the air intake micro-hole 81, and its slope can guide the intake airflow.

[0054] like Figure 1 , Figure 3 and Figure 13As shown, a hydraulic piston 96 is connected inside the bottom cylinder 91. The hydraulic piston 96 is coaxially and fixedly connected to the hydraulic piston rod 92. The side wall of the bottom cylinder 91 is connected to an inlet pipe 97 and an outlet pipe 99. An inlet check valve 98 is connected to the body of the inlet pipe 97, and an outlet check valve 910 is connected to the body of the outlet pipe 99. A three-way directional valve 911 is connected to the joint of the inlet pipe 97, the outlet pipe 99, and the circulation pipe 24. The hydraulic piston rod 92 is fixedly connected to the hydraulic piston 96. The inlet check valve 98, the outlet check valve 910, and the three-way directional valve 911 are all standard hydraulic components, forming a closed hydraulic circuit to drive the circulating suction plate 23 to circulate and inject fluid, directly converting the linear mechanical power of the external electric push rod 93 into... For the reciprocating motion of the hydraulic piston 96, the inlet pipe 97 and outlet pipe 99 are equipped with inlet check valve 98 and outlet check valve 910. When the hydraulic piston 96 moves outward, the inlet check valve 98 opens and the outlet check valve 910 closes, allowing liquid to be drawn into the bottom cylinder 91. When the hydraulic piston 96 moves inward, the inlet check valve 98 closes and the outlet check valve 910 opens, allowing liquid to be expelled. The three-way directional valve 911 connects the inlet pipe 97, the outlet pipe 99, and the circulation pipe 24 leading to the circulation suction plate 23, forming a closed loop. It should be noted that the inlet check valve 98, the outlet check valve 910, and the three-way directional valve 911 of the synchronous drive assembly 9 are all corrosion-resistant, highly reliable small hydraulic standard parts. By using standard parts for assembly and connection, the assembly and maintenance of the entire closed loop are simpler and more convenient, improving assembly efficiency. Compared to complex multi-stage transmission gears or linkage stirring mechanisms, this hydraulic circuit structure is simpler, with fewer moving parts (mainly hydraulic pistons), resulting in higher operational stability and a lower failure rate under harsh conditions such as sandstorms and large temperature differences. Furthermore, all components are corrosion-resistant, significantly reducing the failure rate. More importantly, this hydraulic drive method achieves cyclic suction and injection of the bacterial agent by generating directional fluid flow in a closed loop. The fluid shear force generated in this process is far lower than the direct shear of traditional mechanical stirring blades, thus effectively preventing sedimentation while maximizing the protection of the bacterial bioactivity.

[0055] Furthermore, the transmission gear 95 and the stirring shaft 33 are coaxially and fixedly connected to the shaft body at the bottom of the water-retaining agent storage tank 3. The synchronous drive assembly 9 also includes an electric push rod 93. The outer shell of the electric push rod 93 is fixedly connected to the spraying base plate 1. The telescopic end of the electric push rod 93 is coaxially and fixedly connected to the hydraulic piston rod 92. One end of the hydraulic piston rod 92 is connected to the electric push rod 93, and the other end is connected to the hydraulic piston 96 of the hydraulic transmission unit. At the same time, a linear rack 94 is machined on its rod body, so that each reciprocating linear motion of the hydraulic piston rod 92 simultaneously drives the hydraulic piston 96 to perform linear motion of liquid injection. The linear motion can also be converted into rotational motion through the meshing of the linear rack 94 and the transmission gear 95. The forward and reverse rotation of the transmission gear 95 directly drives the stirring shaft 33 and the curved stirring blade 34 to rotate forward and reverse, thereby generating strong shear stirring in the water-retaining agent storage tank 3.

[0056] Working principle: When the device is in operation, the electric push rod 93 drives the hydraulic piston rod 92 to perform linear reciprocating motion. On the one hand, the hydraulic piston rod 92 drives the hydraulic piston 96 at its end to move in the bottom cylinder 91. Under the control of the liquid inlet check valve 98 and the liquid outlet check valve 910, a directional hydraulic flow is generated in the closed loop formed by the liquid inlet pipe 97, the liquid outlet pipe 99, the three-way reversing valve 911 and the circulation pipe 24. This liquid flow drives the circulation suction plate 23 at the bottom of the bacterial agent storage tank 2 to circulate and spray the liquid in the tank, realizing gentle and continuous anti-sedimentation stirring. On the other hand, the linear rack 94 fixed on the hydraulic piston rod 92 moves accordingly and meshes with the transmission gear 95 to rotate. The transmission gear 95 is coaxially fixed with the stirring shaft 33 at the bottom of the water-retaining agent storage tank 3, thereby converting the linear reciprocating motion into the forward and reverse rotation of the stirring shaft 33, which drives the curved stirring blades 34 and the shearing ribs 35 on it to perform strong shearing stirring in the water-retaining agent storage tank 3, effectively breaking up the water-retaining agent clumps.

[0057] With materials ready, the device proceeds along a preset path. First, the bacterial agent pump 22 starts, pumping the bacterial solution, which has been stirred evenly by the circulating suction plate 23, into the spray pipe 7 through the infusion hose 72, and atomizing it from multiple nozzles 71 at its lower end to form the initial coverage. Next, the water-retaining agent pump 32 starts, spraying the water-retaining agent solution, which has been fully sheared and dispersed by the curved stirring blades 34, onto the sand surface already covered with bacterial agent through another set of spray pipes 7 and nozzles 71. Then, the sowing component 4 starts working, and the negative pressure seed pump 47 draws the gravity-flowing seeds collected by the bottom slope 46 in the seed bin 41 through the seed delivery pipe 43 to the tree-shaped distribution pipe 45. After being evenly distributed through multiple parallel discharge ports, the seeds are evenly sown on the previously treated area.

[0058] Throughout the spraying process, the air pump 87 on the windproof cover 8 under the spraying mechanism works continuously, drawing external air into the annular air intake chamber 83 through the air intake micro-hole 81, then pressurizing it into the annular air outlet chamber 84 through the exhaust pipe 89, and finally spraying it downward through the air outlet 85 with the cross-slit membrane 86, forming a downward dynamic isolation air curtain between the two layers of sealing brushes 812, creating a stable working environment inside the cover, and realizing efficient, precise, and adaptive fully automatic soil crust spraying and remediation operations in complex sandy environments.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A windbreak and sand-resistant soil crust spraying device, comprising a spraying mechanism, characterized in that: The spraying mechanism includes a fungicide spraying component, a water-retaining agent spraying component, and a seeding component (4) arranged sequentially along the direction of travel of the device. The microbial agent spraying assembly is equipped with a circulating suction plate (23). The circulating suction plate (23) has the following circulation path for the microbial agent: the microbial agent in the microbial agent spraying assembly is drawn out from the bottom of the tank, and then the drawn-out microbial agent is sprayed back into the assembly to disturb the sediment. The water-retaining agent spraying assembly is rotatably connected with a curved stirring blade (34) that continuously performs forward and reverse shearing and stirring. The seeding assembly (4) includes a tree-shaped diversion pipe (45) with multiple parallel discharge ports. The bottom spraying section of the spraying mechanism is covered with a windproof cover (8). The windproof cover (8) is equipped with a microenvironment air curtain assembly. The microenvironment air curtain assembly forms an adjustable isolation air curtain below the windproof cover (8) through the airflow. The microenvironment air curtain assembly includes an annular air inlet chamber (83) and an annular air outlet chamber (84) opened inside the windproof cover (8). An air pump (87) is fixedly connected to the inner wall of the windproof cover (8). The air inlet end of the air pump (87) is connected to the annular air outlet chamber (84). An air inlet pipe (88) is connected to the upper end of the air inlet chamber (83), and an exhaust pipe (89) is connected to the air outlet end of the air pump (87) and the annular air outlet chamber (84). The outer wall of the windproof cover (8) is provided with several air inlet micro-holes (81) connected to the annular air inlet chamber (83). The bottom edge of the windproof cover (8) is provided with several air outlet holes (85) connected to the annular air outlet chamber (84). The airflow velocity ejected from the air outlet holes (85) is configured to be lower than the sand grain starting wind speed threshold. A synchronous drive assembly (9) is provided between the microbial agent spraying assembly and the water-retaining agent spraying assembly. The synchronous drive assembly (9) includes an electric push rod (93) and a synchronously driven hydraulic transmission unit and a meshing transmission unit. The hydraulic transmission unit of the synchronous drive assembly (9) includes a bottom cylinder (91) and a hydraulic piston rod (92). The meshing transmission unit of the synchronous drive assembly (9) includes a meshing linear rack (94) and a transmission gear (95). A circulation pipeline (24) is connected between the bottom cylinder (91) and the circulation suction plate (23). A stirring shaft (33) is coaxially fixedly connected between the transmission gear (95) and the curved stirring blade (34). The linear rack (94) is opened on the rod of the hydraulic piston rod (92). The hydraulic transmission unit and the meshing transmission unit are synchronously driven by the same electric push rod (93) to push the movement of the hydraulic piston rod (92).

2. The windbreak and sand-resistant soil crust spraying device according to claim 1, characterized in that: The device also includes a spraying base plate (1), on which a protective shell (11) is fixedly connected. The protective shell (11) covers the outside of the spraying mechanism, and tracked wheels (12) are connected to both sides of the lower plate of the spraying base plate (1).

3. The windbreak and sand-resistant soil crust spraying device according to claim 2, characterized in that: The upper surface of the spraying base plate (1) is also integrated with a storage battery (5) and a controller (6). The top of the protective shell (11) is fixedly connected with a traveling camera (13) and a wind sensor (14). The storage battery (5) is electrically connected to each electrical component, and the controller (6) is signal connected to each electrical component. The controller (6) dynamically adjusts the airflow speed in the microenvironment air curtain assembly according to the feedback signal from the wind sensor (14).

4. The windbreak and sand-resistant soil crust spraying device according to claim 2, characterized in that: The microbial agent spraying assembly includes a microbial agent storage tank (2), which is fixedly connected to the spraying base plate (1) by support legs. The upper end of the microbial agent storage tank (2) is connected to a microbial agent injection pipe (21), and the pipe body of the microbial agent injection pipe (21) penetrates the top shell of the protective shell (11). The circulating suction plate (23) is embedded in the bottom of the microbial agent storage tank (2), and the plate body of the circulating suction plate (23) has several liquid outlet holes (25). The bottom end of the circulating suction plate (23) is connected to a circulation pipeline (24). The water-retaining agent spraying assembly includes a water-retaining agent storage tank (3). The water-retaining agent storage tank (3) is fixedly connected to the spraying base plate (1) by the support legs. The upper end of the water-retaining agent storage tank (3) is connected to the water-retaining agent injection pipe (31). The pipe body of the water-retaining agent injection pipe (31) penetrates the top shell of the protective shell (11). The bottom end of the water-retaining agent storage tank (3) is rotatably connected to the stirring shaft (33). The curved stirring blade (34) is fixedly connected to the shaft of the stirring shaft (33) located inside the water-retaining agent storage tank (3) in a centrally symmetrical manner. Both sides of the curved stirring blade (34) are connected to multiple protruding shear ribs (35).

5. The windbreak and sand-resistant soil crust spraying device according to claim 4, characterized in that: Both the bacterial agent storage tank (2) and the water-retaining agent storage tank (3) are individually connected to a spray pipe (7). The upper end of the spray pipe (7) is connected to an infusion hose (72), and the lower end of the spray pipe (7) is connected to several equally spaced nozzles (71). The bottom wall of the bacterial agent storage tank (2) is connected to a bacterial agent pump (22). The other end of the infusion hose (72) connected to one of the spray pipes (7) is connected to the outlet of the bacterial agent pump (22). The bottom wall of the water-retaining agent storage tank (3) is connected to a water-retaining agent pump (32), and the other end of the infusion hose (72) connected to another spray pipe (7) is connected to the outlet of the water-retaining agent pump (32).

6. The windbreak and sand-resistant soil crust spraying device according to claim 2, characterized in that: The sowing assembly (4) includes a seed bin (41) and a distribution bin (42). The seed bin (41) is fixedly connected to the spraying base plate (1). The tree-shaped diversion pipe (45) is fixedly connected inside the distribution bin (42). The spraying base plate (1) has an installation positioning groove (15) on its body. The bottom end of the distribution bin (42) is fixedly placed in the installation positioning groove (15). The bottom end of the seed bin (41) is connected to the upper inlet of the tree-shaped diversion pipe (45) by a seed delivery pipe (43). The body of the seed delivery pipe (43) is equipped with a negative pressure seed delivery pump (47). The top of the seed bin (41) is connected to a seed filling tube (44), and the tube body of the seed filling tube (44) penetrates the top shell of the protective shell (11). The bottom of the seed bin (41) is provided with a bottom slope (46), and the connection position between the seed delivery tube (43) and the seed bin (41) is located at the inclined bottom end of the bottom slope (46).

7. The windbreak and sand-resistant soil crust spraying device according to claim 1, characterized in that: The windproof cover (8) has a square shape. An air pump (87) is fixedly connected to the inner wall of the windproof cover (8). An air inlet pipe (88) is connected between the air inlet end of the air pump (87) and the upper end of the annular air inlet chamber (83). An exhaust pipe (89) is connected between the air outlet end of the air pump (87) and the annular air outlet chamber (84). Two layers of sealing brushes (812) are connected to the bottom of the windproof cover (8). The opening position of the air outlet (85) is located between the two layers of sealing brushes (812). A cross-slit diaphragm (86) is connected in the hole of each air outlet (85). The air velocity of the air jet from the air outlet (85) is 0.5-1.5m / s.

8. The windbreak and sand-resistant soil crust spraying device according to claim 7, characterized in that: The windproof cover (8) has a debris discharge door (82) connected to its side wall. The outer side wall of the annular air intake chamber (83) has a debris discharge groove (814). The upper end of the debris discharge door (82) is rotatably connected to the debris discharge groove (814), and the lower end of the debris discharge door (82) is limited and locked in the debris discharge groove (814). The exhaust pipe (89) is connected to an electromagnetic reversing valve (810). The electromagnetic reversing valve (810) is also connected to... A backflush pipe (811) is provided, and the other end of the backflush pipe (811) is connected to the bottom end of the annular air intake chamber (83). A guide plate (813) is connected inside the annular air intake chamber (83). The installation position of the guide plate (813) is level with the opening position of the air intake micro-hole (81). The connection position of the backflush pipe (811) in the annular air intake chamber (83) is level with the connection position of the debris discharge door plate (82).

9. The windbreak and sand-resistant soil crust spraying device according to claim 4, characterized in that: A hydraulic piston (96) is connected inside the bottom cylinder (91). The hydraulic piston (96) is fixedly connected to the hydraulic piston rod (92) on the same axis. The side wall of the bottom cylinder (91) is connected to an inlet pipe (97) and an outlet pipe (99). An inlet check valve (98) is connected to the pipe body of the inlet pipe (97). An outlet check valve (910) is connected to the pipe body of the outlet pipe (99). A three-way directional valve (911) is connected to the pipe joint of the inlet pipe (97), the outlet pipe (99) and the circulation pipe (24). The inlet check valve (98), the outlet check valve (910) and the three-way directional valve (911) are all standard hydraulic components, forming a closed hydraulic circuit for driving the circulation suction disc (23) to circulate and suck and spray.

10. The windbreak and sand-resistant soil crust spraying device according to claim 9, characterized in that: The transmission gear (95) and the stirring shaft (33) are fixedly connected coaxially to the shaft body at the bottom of the water-retaining agent storage tank (3). The outer shell of the electric push rod (93) is fixedly connected to the spraying base plate (1). The telescopic end of the electric push rod (93) is fixedly connected coaxially to the hydraulic piston rod (92).

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