A high and steep slope grass seed spraying and seeding device and a spraying and seeding method

Abstract

The application relates to the technical field of high and steep slope repairing, in particular to a high and steep slope grass seed spraying and seeding device and a spraying and seeding method, which comprises a walking mechanism, a grass seed mixing mechanism and a water-retaining agent spraying mechanism. The grass seed mixing mechanism is internally provided with a rotating shaft, a first stirring rod, a second stirring rod and a lifting filtering mechanism, the lifting filtering mechanism comprises spiral lifting blades and a filter screen, can vertically circulate the grass seed mixture and filter large-particle impurities. The walking mechanism is fixed on the top of the slope by adopting a track design and cooperating with a front-end traction mechanism. The water-retaining agent spraying mechanism is arranged at the rear end of the walking mechanism, and the layering spraying and seeding of the seeds and the water-retaining agent are realized. The application solves the technical problems that the existing technology has poor stability, low seed adhesion rate and large-particle impurities easily block the pipeline during the operation on the steep slope, and significantly improves the operation efficiency and effect of the high and steep slope greening and repairing.

Description

Technical Field

[0001] This application relates to the field of high and steep slope restoration technology, specifically to a grass seed spraying device and spraying method for high and steep slopes. Background Technology

[0002] With the large-scale development and utilization of mineral resources in my country, the problem of steep slopes left behind by abandoned mines is becoming increasingly prominent. These slopes typically have rocky or barren soil surfaces, making traditional afforestation methods difficult to implement and posing a significant challenge to ecological restoration. The greening and restoration of steep slopes is not only related to the sustainable use of land resources but also directly affects the quality of the regional ecological environment and geological safety.

[0003] In existing technologies, manual seeding is inefficient, requiring workers to walk on steep slopes, which is highly dangerous. Conventional hydroseeding equipment is mainly designed for gentle slopes or flat land, and faces the following technical problems when operating on steep slopes: First, the equipment lacks stability and is prone to slippage on the slope, posing a safety hazard; second, the contact area between the seeds and the slope surface is limited, resulting in poor adhesion and easy washing away by rainwater, making it difficult to guarantee the greening effect.

[0004] This application proposes a grass seed spraying device and method for steep slopes, aiming to solve the technical problems of poor stability, low seed adhesion rate and poor spraying effect in existing technologies when operating on steep slopes. Summary of the Invention

[0005] A grass seed spraying device for steep slopes includes a walking mechanism, a grass seed mixing mechanism, and a water-retaining agent spraying mechanism, wherein:

[0006] The grass seed mixing mechanism is located at the front end of the walking mechanism. The grass seed mixing mechanism includes a support base and a lifting and filtering mechanism. The support base can adjust the tilt angle of the grass seed mixing mechanism.

[0007] The lifting and filtering mechanism is located inside the grass seed mixing mechanism. The lifting and filtering mechanism includes spiral lifting blades and a filter screen. The spiral lifting blades vertically circulate the grass seed mixture, while the filter screen at the upper outlet of the lifting and filtering mechanism performs filtration.

[0008] The water-retaining agent spraying mechanism is located at the rear end of the walking mechanism, and the water-retaining agent spraying mechanism is used to store and spray water-retaining agent.

[0009] Preferably, the grass seed mixing mechanism has a rotating shaft installed inside, and a mixing motor that drives the rotating shaft to rotate is provided at the bottom of the grass seed mixing mechanism. The lower end of the rotating shaft is provided with a first stirring rod with a bent structure on both sides. The straight end of the first stirring rod is provided with a second stirring rod on both sides, and the first stirring rod and the second stirring rod are staggered.

[0010] Preferably, the lifting filter mechanism is wrapped around the outside of the rotating shaft. The rotating shaft is provided with a spiral lifting blade at one end inside the lifting filter mechanism, and the outer edge of the spiral lifting blade is close to the cylinder wall of the lifting filter mechanism. The lower end of the lifting filter mechanism is provided with annularly distributed inlets, and the upper end of the lifting filter mechanism is provided with annularly distributed outlets.

[0011] Preferably, the top of the lifting filter mechanism is an open structure and is fixed to the top cover. The middle position of the top cover is provided with an installation groove that communicates with the top of the lifting filter mechanism. A sealing cover is installed inside the installation groove by threaded engagement. A movable cover is installed at the upper end of the sealing cover. The bottom of the movable cover is provided with insert plates of the same number as the outlets. The insert plates penetrate the sealing cover and slide with the sealing cover. A filter screen is installed at the bottom of each insert plate. The filter screen extends into the interior of the outlet and blocks the outlet.

[0012] Preferably, a handle is fixedly provided on the upper end surface of the movable cover. The handle is rotated to disassemble and assemble the sealing cover, and the lifting handle is used to disassemble and assemble the insert plate and filter screen.

[0013] Preferably, a first spray pipe is provided below the grass seed mixing mechanism, and a plurality of grass seed mixture nozzles are provided at the bottom of the first spray pipe. A second spray pipe is provided below the water-retaining agent spraying mechanism, and a plurality of water-retaining agent nozzles are provided at the bottom of the second spray pipe. Both ends of the first and second spray pipes are connected to the fixed base of the walking mechanism. A conveying pipe is provided between the grass seed mixing mechanism and the first spray pipe, and between the water-retaining agent spraying mechanism and the second spray pipe. A conveying pump is provided outside the conveying pipe.

[0014] Preferably, the traveling mechanism includes two fixed seats, each with a track wheel rotatably mounted at both ends, a track between the two track wheels, and at least one support wheel at the upper and lower ends of each fixed seat, with the support wheel tangent to the inner side of the track. A connecting beam is fixedly provided on both sides between the two fixed seats, and a traveling motor is installed on both sides of the rear connecting beam, with the output shaft of the traveling motor connected to the track wheel via a reducer.

[0015] Preferably, a mounting base is fixedly provided on the outer wall of the grass seed mixing mechanism, and a support base is provided on both sides of the mounting base. The upper end of the support base is rotatably connected to the mounting base, and the lower end of the support base is fixed to the fixed base of the walking mechanism. An angle adjustment motor is installed on the outer side of one of the support bases.

[0016] Preferably, a traction mechanism is provided on the front side of the fixed base. The two sides of the traction mechanism are connected to the fixed base through fixed plates. A winch is rotatably installed inside the traction mechanism. A steel cable is wound on the winch, and one end of the steel cable extends to the outside of the traction mechanism. A fixed plate is provided at the end of the steel cable outside the traction mechanism. At least one anchor rod is provided on the fixed plate. A traction motor is installed on one side of the fixed plate, and the output end of the traction motor is connected to the winch.

[0017] A method for spraying grass seeds using a hydroseeding device on steep slopes includes the following steps:

[0018] Step 1: Move the device to the starting point of the steep slope operation, take out the anchor rods on the fixing plate, fix the anchor rods to the stable rock mass at the top of the slope, tighten the steel cable to complete the overall traction and fixation of the device, and prevent slippage during steep slope operation.

[0019] Step 2: Based on the actual slope of the steep slope, start the angle adjustment motor to drive the grass seed mixing mechanism to rotate, and adjust the grass seed mixing mechanism to the appropriate tilt angle for the working slope.

[0020] Step 3: Put the substrate and grass seeds into the grass seed mixing mechanism, start the mixing motor, and drive the rotating shaft, the first stirring rod and the second stirring rod to rotate synchronously to mix the materials; at the same time, the rotating shaft drives the spiral lifting blades to rotate, and the mixture enters from the lower end of the lifting and filtering mechanism, is lifted vertically and discharged from the upper end, realizing the material circulation and mixing, and the filter screen intercepts large particles of impurities in the mixture, filtering and refining the mixture;

[0021] Step 4: Start the delivery pump to transport the refined grass seed mixture from the grass seed mixing mechanism to the first spray pipe through the delivery pipe. The mixture is then evenly sprayed onto the surface of the steep slope through multiple grass seed mixture nozzles. Simultaneously, start the water-retaining agent spraying mechanism to transport the water-retaining agent to the second spray pipe through the delivery pipe. The water-retaining agent is then sprayed onto the surface of the mixture through the water-retaining agent nozzles, completing the layered spraying of seeds and water-retaining agent.

[0022] Step 5: After a single mixing and spraying operation is completed, the track is driven by a walking motor to move, and the steel cable is raised and lowered in real time by the traction mechanism to realize continuous mobile spraying operation on the slope.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention employs a tracked walking mechanism combined with a front-mounted steel cable traction and anchoring structure to form a dual stability and protection system. This solves the technical defects of traditional hydroseeding equipment, such as poor stability, easy slippage, and low safety when operating on steep rock slopes. Through anchor bolt anchoring and steel cable tensioning, the slope sliding force generated by the equipment's own weight can be effectively offset. Combined with a multi-angle adaptive mixing mechanism, it can adapt to construction conditions on steep slopes of different gradients. This not only significantly improves the safety and adaptability of the equipment for steep slope operations but also eliminates the need for close-range manual slope work, greatly reducing construction risks and improving overall construction efficiency.

[0025] 2. The method of independently spraying grass seed substrate and water-retaining agent in layers differs from traditional mixed spraying processes. This avoids the clumping and failure issues caused by pre-mixing the water-retaining agent with the substrate and grass seeds, maximizing the soil-fixing and water-locking properties of the agent. The construction logic of first laying the seed substrate layer and then spraying the water-retaining agent protective layer significantly enhances the adhesion between the grass seeds and the slope surface, effectively resisting seed loss and slope delamination caused by rainwater erosion. This greatly improves the survival rate of greening and the soil-fixing effect in ecological restoration of steep slopes, ensuring long-term stable ecological restoration quality.

[0026] 3. By incorporating a staggered double-layer mixing structure with a spiral lifting and circulating filtration mechanism, the traditional static single-cycle mixing mode of hydroseeding equipment is transformed. This enables vertical circulating mixing of grass seeds and substrate materials, effectively eliminating mixing dead zones and preventing problems such as material stratification, grass seed agglomeration, and substrate sedimentation. Simultaneously, it can filter and intercept large particles in the mixture in real time, refining the particle size of the hydroseeding material and eliminating blockages in the conveying pipes and nozzles at the source. This significantly improves the uniformity and fineness of the mixture, effectively ensuring the continuity and uniformity of hydroseeding operations on steep slopes. Attached Figure Description

[0027] Figure 1 The overall three-dimensional representation of the present invention Figure 1 ;

[0028] Figure 2 For overall three-dimensional Figure 2 ;

[0029] Figure 3 This is an overall bottom view;

[0030] Figure 4 A 3D diagram of the walking mechanism;

[0031] Figure 5 A three-dimensional view of the grass seed mixing mechanism and the first nozzle;

[0032] Figure 6 This is a cross-sectional view of the interior of the grass seed mixing mechanism;

[0033] Figure 7 for Figure 6 Enlarged view of a portion of region A in the middle;

[0034] Figure 8 A 3D view of the lifting filter mechanism;

[0035] Figure 9 This is a schematic diagram of the installation structure of the sealing cap and the top cover.

[0036] In the picture:

[0037] 1. Walking mechanism; 11. Fixed seat; 12. Track wheel; 13. Track; 14. Support wheel; 15. Connecting beam; 16. Walking motor; 2. Traction mechanism; 21. Fixed plate; 22. Traction motor; 23. Steel cable; 24. Fixed plate; 25. Anchor bolt; 26. Winch; 3. Grass seed mixing mechanism; 31. Top cover; 32. Mounting seat; 33. Support seat; 34. Angle adjustment motor; 35. Mixing motor; 36. Rotary... 37. Rotating shaft; 38. First stirring rod; 39. Second stirring rod; 4. Mounting groove; 5. Water-retaining agent spraying mechanism; 6. First spray pipe; 70. Grass seed mixture nozzle; 8. Second spray pipe; 9. Water-retaining agent nozzle; 10. Lifting filter mechanism; 11. Spiral lifting blade; 12. Outlet; 13. Inlet; 14. Sealing cover; 15. Movable cover; 16. Insert plate; 17. Handle; 18. Filter screen; 19. Feed pipe; 20. Conveying pump. Detailed Implementation

[0038] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1:

[0040] like Figure 1-9 As shown, a grass seed spraying device for steep slopes includes a walking mechanism 1, a grass seed mixing mechanism 3, and a water-retaining agent spraying mechanism 4, wherein:

[0041] The grass seed mixing mechanism 3 is located at the front end of the walking mechanism 1. The grass seed mixing mechanism 3 includes a support base 33 and a lifting and filtering mechanism 7. The support base 33 can adjust the tilt angle of the grass seed mixing mechanism 3.

[0042] Specifically, a rotating shaft 36 is installed inside the grass seed mixing mechanism 3. A mixing motor 35 is installed at the bottom of the grass seed mixing mechanism 3 to drive the rotating shaft 36 to rotate. A first stirring rod 37 with a bent structure is provided on both sides of the lower end of the rotating shaft 36. The bent structure can fit the bottom contour of the cavity, eliminate the bottom stirring dead corner, and avoid the accumulation of heavy substrate. A second stirring rod 38 is provided on both sides of the straight end of the first stirring rod 37, and the first stirring rod 37 and the second stirring rod 38 are staggered.

[0043] The first stirring rod 37 is responsible for stirring the material in a large area at the bottom and around the cavity, while the second stirring rod 38 is responsible for breaking down the material in the middle layer. The staggered arrangement of the two stirring bodies can achieve all-round stirring of the material inside the cavity without dead angles. Compared with the traditional single-layer stirring structure, it greatly improves the mixing uniformity of grass seeds and substrate, avoids the problems of grass seed agglomeration and substrate stratification, and lays the foundation for subsequent uniform spraying.

[0044] The lifting and filtering mechanism 7 is built into the center of the grass seed mixing mechanism 3 cavity and is arranged coaxially with the rotating shaft 36. The core configuration is a spiral lifting blade 71, which uses the spiral conveying principle to vertically circulate and lift the grass seed mixture inside the cavity, realizing a dynamic mixing mode of bottom stirring combined with upper circulation, solving the defects of insufficient mixing and uneven material concentration in traditional static stirring.

[0045] The water-retaining agent spraying mechanism 4 is fixedly installed in the rear area of ​​the walking mechanism 1, corresponding to the front grass seed mixing mechanism 3 and operating in separate zones. It has an independent storage chamber reserved inside, which is specifically used to store liquid water-retaining agent, soil stabilizing agent and other maintenance auxiliary materials. It can achieve independent spraying, which is separated from the grass seed mixing spraying process, avoiding the water-retaining agent failure and material clumping problems caused by pre-mixing.

[0046] To achieve automated spraying, a first spray pipe 5 is horizontally mounted below the grass seed mixing mechanism 3. Multiple grass seed mixture nozzles 51, evenly spaced, are arrayed at the bottom of the first spray pipe 5. This multi-point, evenly distributed nozzle design ensures uniform spray coverage with no blank areas. Correspondingly, a second spray pipe 6 is horizontally mounted below the water-retaining agent spraying mechanism 4. Similarly, multiple sets of equally spaced water-retaining agent nozzles 61 are arrayed at the bottom of the second spray pipe 6, achieving full coverage spraying of the water-retaining agent.

[0047] Both ends of the first spray pipe 5 and the second spray pipe 6 are fixed to the fixed seat 11 of the traveling mechanism 1 by bolts to ensure that the spray pipes do not shake or deviate during operation. Pressure-resistant conveying pipes 8 connect the discharge end of the grass seed mixing mechanism 3 to the first spray pipe 5 and the discharge end of the water-retaining agent spraying mechanism 4 to the second spray pipe 6. Each conveying pipe 8 is equipped with a conveying pump 9, which provides stable conveying pressure to achieve quantitative and uniform conveying of the mixture and water-retaining agent, ensuring uniform spraying thickness and spraying volume.

[0048] Furthermore, mounting seats 32 are symmetrically welded and fixed on both sides of the outer wall of the grass seed mixing mechanism 3. The mounting seats 32 have an ear-type hinge structure, and support seats 33 are hinged to both sides. The upper end of the support seat 33 forms a rotating pair with the mounting seat 32, and the lower end of the support seat 33 is locked and fixed to the fixed seat 11 of the walking mechanism 1 by bolts, forming a stable support base. An angle adjustment motor 34 is fixedly installed on the outer wall of one of the support seats 33. The angle adjustment motor 34 drives the mounting seat 32 to rotate relative to the support seat 33 through gear transmission, thereby driving the entire grass seed mixing mechanism 3 to flip and adjust its angle. It can be adapted to high and steep slope operations of 30°-80°, greatly improving the equipment's adaptability range.

[0049] Example 2:

[0050] Based on Example 1, a lifting and filtering mechanism 7 is installed inside the grass seed mixing mechanism 3. The lifting and filtering mechanism 7 is a vertical cylindrical structure, coaxially wrapped around the outside of the rotating shaft 36, and rotates synchronously with the rotating shaft 36 and works in coordination. A spiral lifting blade 71 is integrally formed on the shaft body inside the cylinder of the rotating shaft 36. The outer edge of the spiral lifting blade 71 fits snugly against the inner wall of the cylinder of the lifting and filtering mechanism 7, which can not only avoid material jamming, but also maximize the material lifting efficiency, prevent material from slipping from the gap, and ensure the vertical circulation conveying effect.

[0051] The lower end of the lifting filter mechanism 7 has multiple sets of evenly distributed annular inlets 73, and the upper end of the cylinder has multiple sets of evenly distributed annular outlets 72. The upper and lower annular feeding and discharging structures can realize all-round feeding and discharging of the cylinder. The material enters the cylinder from the bottom of the cavity through the annular inlets 73. Under the rotational pushing action of the spiral lifting blades 71, it is lifted and conveyed vertically upward along the cylinder, and finally discharged evenly from the upper annular outlets 72, falling back to the upper part of the cavity of the grass seed mixing mechanism 3, forming a continuous vertical circulation mixing system, which allows the thick substrate at the bottom to fully integrate with the light grass seeds at the top, solving the problem of material stratification.

[0052] The top of the lifting filter mechanism 7 is designed as an open port, which is welded and sealed to the top cover 31 to ensure the overall structural airtightness and prevent material splashing and dust leakage during the mixing process. A through-type mounting groove 39 is provided in the center of the top cover 31, which communicates with the top port of the lifting filter mechanism 7. The inner wall of the mounting groove 39 is provided with internal threads, and a sealing cover 74 can be detachably installed through thread engagement. The threaded assembly method is convenient for disassembly and assembly, and has excellent sealing performance, which can effectively prevent material from overflowing from gaps during operation.

[0053] A movable cover 75 is movably mounted on the upper end of the sealing cover 74. A corresponding number of insert plates 76, one-to-one with the number of outlets 72, are vertically fixed to the bottom of the movable cover 75. The insert plates 76 are made of a smooth, hard material, vertically penetrating the sealing cover 74 and forming a vertical sliding fit with it, allowing for smooth up-and-down movement. A filter screen 78 is fixedly installed at the bottom of each insert plate 76, extending into the interior of the outlet 72 of the lifting filter mechanism 7, completely covering and blocking the discharge section of the outlet 72.

[0054] The filter screen 78 is made of high-strength, wear-resistant stainless steel microporous filter screen. The pore size can be adapted according to construction needs. It can effectively intercept large particles such as unbroken soil clods and stones in the substrate, allowing only fine substrate and grass seeds to pass through smoothly. This prevents large particles from entering the conveying pipe 8 and the nozzle and causing blockage, ensuring the continuity of the spraying operation. At the same time, it ensures that the sprayed mixture is fine and uniform, improving the adhesion between the grass seeds and the slope surface.

[0055] An integrated handle 77 is fixedly installed at the center of the upper end face of the movable cover 75, forming an integrated operating structure with two operation adjustment functions: First, rotating the handle 77 can drive the sealing cover 74 to rotate synchronously, and the sealing cover 74 can be disassembled and assembled as a whole using threaded engagement, which is suitable for regular equipment overhaul and thorough internal cleaning scenarios; Second, the vertical lifting handle 77 can drive the movable cover 75, the insert plate 76 and the filter screen 78 to be vertically lifted as a whole, quickly releasing the filter screen 78 from the outlet 72, adapting to different operating conditions.

[0056] In actual operation, during the mixing and filtration stage, the filter screen 78 falls to block the outlet 72, thereby intercepting and filtering impurities. After mixing is completed, the handle 78 is pulled up to move the filter screen up, removing the filter blockage. This allows for the rapid delivery and spraying of large-volume materials, balancing mixing quality and spraying efficiency. At the same time, the detachable filter screen structure facilitates daily cleaning and replacement, significantly reducing equipment maintenance costs.

[0057] Example 3:

[0058] Based on Embodiment 1, the walking mechanism 1 serves as the load-bearing and moving unit of the entire machine, primarily addressing the technical problems of traditional spraying equipment, such as easy slippage, poor stability, and jamming on steep slopes. The walking mechanism 1 includes two sets of fixed seats 11 arranged symmetrically on the left and right. Each set of fixed seats 11 has rotatably mounted track wheels 12 at both ends. A track 13 is tensioned and fitted between the two track wheels 12 on the same side, employing a tracked walking structure. Compared to a wheeled structure, this tracked structure has a larger ground contact area and lower pressure, making it suitable for uneven rock slopes and less prone to slippage and getting stuck. At least one set of support wheels 14 is provided on the upper and lower inner sides of the fixed seats 11. The wheel surfaces of the support wheels 14 are tightly tangent to the inner surfaces of the track 13, providing elastic support to the inside of the track 13 and preventing collapse, deformation, or derailment during operation, thus improving the smoothness and structural stability of the track.

[0059] Connecting beams 15 are welded to both the front and rear sides of the two sets of fixed seats 11. These connecting beams 15 connect the two sets of fixed seats 11 into an integral frame structure, significantly improving the overall structural strength and preventing deformation and shaking during operation. Travel motors 16 are symmetrically installed on both sides of the rear connecting beam 15. The output shaft of the travel motor 16 is connected to the track wheel 12 via a reducer. The reducer can reduce speed and increase torque, providing sufficient power for steep uphill and lateral movement, ensuring stable movement of the equipment on high-resistance slopes, with smooth start-stop and no jerking or slippage.

[0060] To further and thoroughly resolve the safety hazards of slippage during operations on steep slopes, a traction mechanism 2 is installed on the front side of the front-end fixed base 11, forming a dual-stabilization structure of tracked movement combined with steel cable traction. The two sides of the traction mechanism 2 are bolted to the front-end fixed base 11 via fixed mounting plates 21, ensuring a secure and reliable connection capable of withstanding high-intensity traction forces. Inside the housing of the traction mechanism 2, a winch 26 is rotatably installed. The winch 26 is a large-capacity winding structure, on which a high-strength steel cable 23 is evenly wound. One end of the steel cable 23 extends to the outside of the traction mechanism 2, and a fixing plate 24 is fixedly mounted on the extended end. The fixing plate 24 is a heavy-duty steel plate structure, with at least one anchor rod 25 running through its surface. The anchor rod 25 can be strongly anchored in the stable rock mass and soil layer at the top of the slope, providing strong fixing and bearing capacity.

[0061] A traction motor 22 is fixedly installed on the outside of the fixed plate 21. The output end of the traction motor 22 is connected to the winch 26 for transmission, which can precisely control the forward and reverse rotation of the winch 26 to realize the automatic winding and tension adjustment of the steel cable 23. During operation, the steel cable 23 is always kept taut, forming a forward tilting tension constraint on the whole machine, which counteracts the downward force generated by the weight of the equipment, fundamentally eliminating the safety hazards of equipment slippage and falling on steep slopes, and greatly improving the safety and stability of high and steep slope construction.

[0062] Example 4:

[0063] A method for spraying grass seeds using a hydroseeding device on steep slopes includes the following steps:

[0064] Step 1: Equipment Anchoring and Fixing: Move the entire machine to the preset starting point of the steep slope, level the working base, remove the anchor rods 25 on the fixing plate 24, and drive the anchor rods 25 vertically into the stable rock mass or solid soil layer at the top of the slope to achieve rigid anchoring and fixing. Then, start the traction motor 22 to drive the winch 26 to rotate and tighten the steel cable 23 to a moderate tension state, completing the overall traction constraint and fixing of the device, completely preventing the equipment from slipping or shifting during steep slope operations, and providing safety assurance for subsequent continuous operations.

[0065] Step 2, Slope Adaptive Adjustment: Based on the actual tilt angle and slope flatness of the steep slope to be repaired, start the angle adjustment motor 34. The motor drives the mounting base 32 to rotate relative to the support base 33, precisely adjusting the overall tilt angle of the grass seed mixing mechanism 3. This ensures that the tilt angle of the mixing chamber matches the slope, effectively preventing the accumulation and residue of materials on one side of the chamber during steep slope operations, and ensuring uniform material storage and stable mixing force inside the mixing chamber.

[0066] Step 3: Circulating Filtration and Mixing Operation: The substrate composed of coconut coir, pine bark, perlite, black soil, and organic fertilizer, along with the greening grass seeds, are added to the grass seed mixing mechanism 3 according to the specified ratio. The mixing motor 35 is started, driving the rotating shaft 36 to rotate at high speed. Simultaneously, the bottom-bent first stirring rod 37 and the staggered second stirring rod 38 rotate, thoroughly agitating, dispersing, and mixing the materials. At the same time, the rotating shaft 36 drives the spiral lifting blades 71 inside the lifting filtration mechanism 7 to operate synchronously. The mixture at the bottom of the chamber enters the cylinder through the annular inlet 73 at the lower end of the lifting filtration mechanism 7, and is vertically conveyed upwards under the continuous lifting and pushing of the spiral blades, finally exiting from the upper annular outlet 72, forming a continuous vertical circulating mixing system. During the operation, the filter screen 78 at the outlet 72 continuously intercepts large particles and impurities in the material, allowing only the fine and uniform mixture to circulate and stir, gradually improving the fineness and uniformity of the mixture, thus avoiding nozzle clogging and uneven spraying problems from the source.

[0067] Step 4: Layered Precision Spraying: After the materials are thoroughly mixed and refined, all sets of conveying pumps 9 are started simultaneously. The front conveying pump 9 delivers the refined grass seed mixture from the grass seed mixing mechanism 3 to the first spray pipe 5 at a uniform speed through the conveying pipe 8. The mixture is then evenly sprayed onto the exposed surface of the steep slope via the evenly distributed grass seed mixture nozzles 51, forming a uniform seed substrate bottom layer. Simultaneously, the rear conveying pump 9 starts, delivering the liquid water-retaining agent from the water-retaining agent spraying mechanism 4 to the second spray pipe 6. This agent is then evenly sprayed onto the surface of the freshly sprayed substrate seed layer through the water-retaining agent nozzles 61, forming a water-retaining and seed-fixing protective layer. This layered spraying method effectively improves the adhesion between the grass seeds and the slope surface, locks in water and stabilizes the soil through the water-retaining agent, significantly enhances resistance to rain erosion, prevents seed loss, and ensures a high survival rate for the greening project.

[0068] Step 5, Continuous Mobile Spraying Operation: After spraying a single section of slope, the walking motor 16 is started synchronously according to the operation progress, driving the track wheels 12 to move the tracks 13 smoothly, controlling the equipment to move at a uniform speed laterally or longitudinally along the slope; at the same time, the traction motor 22 works in coordination, real-time raising and lowering of the steel cable 23, always keeping the steel cable 23 in a taut and constrained state, ensuring no slippage or deviation during the equipment movement, realizing large-area, continuous, and uniform spraying operations on steep slopes. During operation breaks, the filter screen can be quickly disassembled and installed, and impurities cleaned, through the lifting and rotating handle 77, ensuring long-term stable operation of the equipment.

Claims

1. A grass seed spraying device for steep slopes, characterized in that: It includes a walking mechanism (1), a grass seed mixing mechanism (3), and a water-retaining agent spraying mechanism (4), wherein: The grass seed mixing mechanism (3) is located at the front end of the walking mechanism (1). The grass seed mixing mechanism (3) includes a support base (33) and a lifting and filtering mechanism (7). The support base (33) can adjust the tilt angle of the grass seed mixing mechanism (3). The lifting and filtering mechanism (7) is located inside the grass seed mixing mechanism (3). The lifting and filtering mechanism (7) includes a spiral lifting blade (71) and a filter screen (78). The grass seed mixture is vertically circulated through the spiral lifting blade (71), and the filter screen (78) at the upper outlet (72) of the lifting and filtering mechanism (7) is used for filtration. The water-retaining agent spraying mechanism (4) is located at the rear end of the walking mechanism (1), and the water-retaining agent spraying mechanism (4) is used to store and spray water-retaining agent.

2. The grass seeding device for steep slopes according to claim 1, characterized in that: The grass seed mixing mechanism (3) has a rotating shaft (36) installed inside. The bottom of the grass seed mixing mechanism (3) is provided with a mixing motor (35) that drives the rotating shaft (36) to rotate. The lower end of the rotating shaft (36) is provided with a first stirring rod (37) with a bent structure on both sides. The straight end of the first stirring rod (37) is provided with a second stirring rod (38) on both sides, and the first stirring rod (37) and the second stirring rod (38) are staggered.

3. The grass seeding device for steep slopes according to claim 2, characterized in that: The lifting filter mechanism (7) is wrapped around the outside of the rotating shaft (36). The rotating shaft (36) is provided with a spiral lifting blade (71) at one end inside the lifting filter mechanism (7), and the outer edge of the spiral lifting blade (71) is close to the cylinder wall of the lifting filter mechanism (7). The lower end of the lifting filter mechanism (7) is provided with an annularly distributed inlet (73), and the upper end of the lifting filter mechanism (7) is provided with an annularly distributed outlet (72).

4. The grass seeding device for steep slopes according to claim 3, characterized in that: The top of the lifting filter mechanism (7) is an open structure and is fixed to the top cover (31). The top cover (31) has a mounting groove (39) in the middle position that communicates with the top of the lifting filter mechanism (7). A sealing cover (74) is installed inside the mounting groove (39) by threaded engagement. A movable cover (75) is installed at the upper end of the sealing cover (74). The bottom of the movable cover (75) is provided with the same number of insert plates (76) as the outlet (72). The insert plates (76) penetrate the sealing cover (74) and slide with the sealing cover (74). A filter screen (78) is installed at the bottom of each insert plate (76). The filter screen (78) extends into the interior of the outlet (72) and blocks the outlet (72).

5. A grass seed spraying device for steep slopes according to claim 4, characterized in that: The upper surface of the movable cover (75) is fixedly provided with a handle (77). Rotating the handle (77) allows for the disassembly and assembly of the sealing cover (74), while lifting the handle (77) allows for the disassembly and assembly of the insert plate (76) and the filter screen (78).

6. The grass seeding device for steep slopes according to claim 1, characterized in that: A first spray pipe (5) is provided below the grass seed mixing mechanism (3). Multiple grass seed mixture nozzles (51) are provided at the bottom of the first spray pipe (5). A second spray pipe (6) is provided below the water-retaining agent spraying mechanism (4). Multiple water-retaining agent nozzles (61) are provided at the bottom of the second spray pipe (6). Both ends of the first spray pipe (5) and the second spray pipe (6) are connected to the fixed seat (11) of the walking mechanism (1). A conveying pipe (8) is provided between the grass seed mixing mechanism (3) and the first spray pipe (5), and between the water-retaining agent spraying mechanism (4) and the second spray pipe (6). A conveying pump (9) is provided outside the conveying pipe (8).

7. The grass seeding device for steep slopes according to claim 1, characterized in that: The walking mechanism (1) includes two fixed seats (11), both ends of which are rotatably mounted with track wheels (12), and a track (13) is provided between the two track wheels (12). At least one support wheel (14) is provided at the upper and lower ends of the fixed seat (11), and the support wheel (14) is tangent to the inner side of the track (13). A connecting beam (15) is fixed on both sides between the two fixed seats (11), and a walking motor (16) is installed on both sides of the rear connecting beam (15). The output shaft of the walking motor (16) is connected to the track wheel (12) through a reducer.

8. The grass seeding device for steep slopes according to claim 1, characterized in that: The grass seed mixing mechanism (3) is fixedly provided with an installation seat (32) on its outer wall. Support seats (33) are provided on both sides of the installation seat (32). The upper end of the support seat (33) is rotatably connected to the installation seat (32), and the lower end of the support seat (33) is fixed to the fixed seat (11) of the walking mechanism (1). An angle adjustment motor (34) is installed on the outer side of one of the support seats (33).

9. A grass seed spraying device for steep slopes according to claim 7, characterized in that: A traction mechanism (2) is provided on the front side of the fixed base (11). The two sides of the traction mechanism (2) are connected to the fixed base (11) through a fixed plate (21). A winch (26) is rotatably installed inside the traction mechanism (2). A steel cable (23) is wound on the winch (26), and one end of the steel cable (23) extends to the outside of the traction mechanism (2). A fixed plate (24) is provided at the end of the steel cable (23) located outside the traction mechanism (2). At least one anchor rod (25) is provided on the fixed plate (24). A traction motor (22) is installed on one side of the fixed plate (21), and the output end of the traction motor (22) is connected to the winch (26).

10. A seeding method for a high and steep slope grass seeding device according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Move the device to the starting point of the high and steep slope operation, take out the anchor rod (25) on the fixing plate (24), fix the anchor rod (25) to the stable rock mass at the top of the slope, and tighten the steel cable (23) to complete the overall traction and fixing of the device; Step 2: Based on the actual slope of the steep slope, start the angle adjustment motor (34) to drive the grass seed mixing mechanism (3) to rotate and adjust the grass seed mixing mechanism (3) to the appropriate tilt angle for the working slope. Step 3: Put the substrate and grass seeds into the grass seed mixing mechanism (3), start the mixing motor (35), drive the rotating shaft (36), the first stirring rod (37) and the second stirring rod (38) to rotate synchronously to mix the materials; at the same time, the rotating shaft (36) drives the spiral lifting blades (71) to rotate, the mixture enters from the lower end of the lifting and filtering mechanism (7), and is discharged from the upper end after being vertically lifted, so as to realize the material circulation and mixing. The filter screen (78) intercepts large particles of impurities in the mixture and filters and refines the mixture. Step 4: Start the delivery pump (9) to deliver the refined grass seed mixture in the grass seed mixing mechanism (3) to the first spray pipe (5) through the delivery pipe (8), and spray it evenly on the surface of the steep slope through multiple grass seed mixture nozzles (51); At the same time, start the water-retaining agent spraying mechanism (4) to deliver the water-retaining agent to the second spray pipe (6) through the delivery pipe (8), and spray it onto the surface of the mixture through the water-retaining agent nozzle (61), thus completing the layered spraying of seeds and water-retaining agent; Step 5: After a single mixing and spraying is completed, the track (13) is driven by the walking motor (16) to move, and the steel cable (23) is pulled up and down in real time by the traction mechanism (2) to realize the continuous mobile spraying operation of the slope.

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