Saline-alkali soil remediation device by acid-base adjustment

Abstract

This invention provides a saline-alkali land remediation device through acid-base adjustment, comprising a mounting frame, within which are a spreading mechanism and a moving mechanism. There are two spreading mechanisms. Each moving mechanism includes a second drive assembly, a forward and reverse threaded rod, and a moving seat. The forward and reverse threaded rod is rotatably connected within the mounting frame, and includes a forward threaded portion and a reverse threaded portion. A moving seat is threadedly connected to each of the forward and reverse threaded portions. Each moving seat is fixedly connected to the housing of one spreading mechanism. The second drive assembly drives the forward and reverse threaded rod to rotate along its own axis. The moving mechanism also includes a guide rail, which is axially arranged along the forward and reverse threaded rod. A slider is provided on the housing, and the slider slides into contact with the guide rail via a tenon-and-mortise joint.

Description

Technical Field

[0001] This invention relates to the field of saline-alkali land ecological restoration, and more specifically, to saline-alkali land restoration equipment through acid-base adjustment. Background Technology

[0002] Saline-alkali land is soil with excessive levels of soluble salts or alkaline substances, exceeding the suitable growth range for plants. This type of soil is prone to compaction, has poor permeability and aeration, often leading to water shortage, root damage, and even plant death. Saline-alkali land is generally divided into saline soil (excessive salt content) and alkalized soil (excessive alkalinity and high pH).

[0003] For the restoration of saline-alkali land, pH balance is one of the core methods. By artificially adding chemical amendments, such as gypsum and sulfur for alkaline soils, or lime for acidic soils, the soil pH can be restored to a suitable range, improving soil structure. In mechanized operations, double-disc fertilizer spreaders are widely used. Their working principle is based on the centrifugal force generated by the high-speed rotation of the two discs, which accelerates the material through the blades and throws it to both sides, creating an effective working width of 6-15 meters.

[0004] In existing technologies, some researchers have also focused on the synchronicity of fertilization and tillage. For example, Chinese patent application number CN202510578925.2 discloses a soil preparation and improvement device for saline-alkali land used for forage planting. The device uses a plowing mechanism to plow the soil and, in conjunction with a discharge pipe and cam design, achieves deep and uniform application of soil conditioner, providing a reference for optimizing deep soil structure.

[0005] However, in practical applications of dual-disc fertilizer spreaders for large-area surface application, challenges remain regarding material distribution due to rotation direction. From a top-down view, if the left disc rotates clockwise and the right disc counter-clockwise, while the spreading area is wide, overlapping areas easily form between the two discs, leading to material impact and accumulation on the equipment surface. If the left disc rotates counter-clockwise and the right disc clockwise, although overlap is less likely, the spreading width is limited. Furthermore, because centrifugal spreading is radial and arc-shaped, when operating at the edge of saline-alkali land, it is extremely easy to spill material into adjacent non-operating areas (such as water sources or fertile land), causing resource waste and environmental pollution. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the purpose of this invention is to provide a saline-alkali land remediation device through acid-base adjustment.

[0007] According to the present invention, a saline-alkali land remediation device by acid-base adjustment includes a mounting frame, which is equipped with a spreading mechanism and a moving mechanism. There are two spreading mechanisms. The moving mechanism includes a second drive assembly, a forward and reverse threaded rod, and a moving seat. The forward and reverse threaded rod is rotatably connected in the mounting frame. The forward and reverse threaded rod includes a forward threaded part and a reverse threaded part. A moving seat is threadedly connected to the forward threaded part and the reverse threaded part respectively. Each moving seat is fixedly connected to the housing of one of the spreading mechanisms. The second drive assembly is used to drive the forward and reverse threaded rod to rotate along its own axis.

[0008] Preferably, the moving mechanism further includes a guide rail, which is arranged axially along the positive and negative threaded rod, and a slider is provided on the housing, which slides into contact with the guide rail through a tenon and mortise structure.

[0009] Preferably, the spreading mechanism includes a spreading disc, a transmission assembly, a first transmission shaft, and a first drive assembly. The first transmission shaft is axially rotatably connected to the mounting frame along a positive and negative threaded rod. The first drive assembly is used to drive the first transmission shaft to rotate. The transmission assembly includes a housing, and a first fixed rod, a second fixed rod, and a third fixed rod are rotatably connected inside the housing. The first fixed rod and the second fixed rod are coaxially sleeved on the outer circumference of the first transmission shaft. The first fixed rod and the second fixed rod are both circumferentially fixed to the first transmission shaft and axially slidably connected. The axis of the third fixed rod is perpendicular to the axis of the first transmission shaft. A bevel gear is provided on the first fixed rod or the second fixed rod. A bevel gear is provided at one end of the third fixed rod. The two bevel gears mesh. The other end of the third fixed rod is fixedly connected to the bottom center of the spreading disc. The spreading disc is parallel to the rotation surface of the third fixed rod and is located above and outside the mounting frame. Multiple baffles are distributed on the upper surface of the spreading disc.

[0010] Preferably, the movable seat is provided with a fixed plate, which extends out of the upper end face of the mounting frame. The upper end face of the mounting frame is provided with a clearance groove for the fixed plate. A material discharge port is fixedly connected to the fixed plate. The material discharge port is located directly above the spreading disc. The material discharge port has a hollow structure and is fixedly connected to one end of the flexible feeding pipe. The other end of the flexible feeding pipe is fixedly connected to the discharge port of the hopper.

[0011] Preferably, it also includes a movable baffle, which is a semi-enclosed structure. The movable baffle includes a blocking part and a connecting part. The blocking part stands on the connecting part, and the bottom of the blocking part is fixedly connected to one end of the connecting part. The blocking part is located at the edge of the spreading disc. The connecting part is rotatably connected to the housing and is coaxial with the third fixed rod. At least one gear is fixedly connected to the connecting part. The gear is coaxial with the connecting part. A bearing plate is fixedly provided inside the mounting frame. A rack corresponding to the gear is fixedly provided on the bearing plate along the axial direction of the positive and negative threaded rod.

[0012] Preferably, the gear includes a first gear and a second gear, the module of the first gear is greater than the module of the second gear, the rack includes a first rack and a second rack, the length of the first rack is greater than the length of the second rack, the first gear and the first rack mesh, the second gear and the second rack mesh, the first rack is far away from the two ends of the throwing mechanism's movement trajectory relative to the second rack, and the first rack and the second rack completely avoid each other in space.

[0013] Preferably, it also includes an auxiliary mechanism, which includes a second drive shaft, a dispersing cylinder, and a movable disc. The second drive shaft is rotatably connected to the mounting frame along the positive and negative threaded rod axis. The movable disc is fixedly sleeved on the second drive shaft. A dispersing cylinder is symmetrically provided on both sides of the movable disc. The movable disc is connected to the dispersing cylinder. The dispersing cylinder is movably sleeved on the second drive shaft. The dispersing cylinder is located in the dispersing direction of the dispersing mechanism. Multiple dispersing blades are distributed on the outer peripheral surface of the dispersing cylinder. The dispersing blades are inclined relative to the axial and radial directions of the dispersing cylinder.

[0014] Preferably, the two dispersion cylinders are fixedly connected to a housing via a connecting frame, and the dispersion cylinders are connected to the movable disc via springs.

[0015] Preferably, the second drive shaft is connected to the first drive shaft via a pulley assembly.

[0016] Preferably, both the first drive mechanism and the second drive mechanism include a drive motor, a first transmission wheel, a second transmission wheel, and a transmission chain. The first transmission wheel is fixedly connected to the output end of the drive motor, and the second transmission wheel is fixedly connected to a positive and negative threaded rod or a first transmission shaft. The first transmission wheel and the second transmission wheel are connected by a transmission chain.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This invention achieves adaptive adjustment of the distance between the two discs by coordinating the moving mechanism and the spreading mechanism. Specifically, a second drive assembly drives the positive and negative threaded rods to rotate, using the positive and negative threaded portions to move the housings of the two moving seats and the spreading mechanism connected to them closer or further apart. This design allows the equipment to flexibly adjust the distance between the two spreading discs according to the physical state of the remediation agent (such as particle size, humidity, and mass), thereby changing the size of the overlapping spreading area. This effectively reduces the accumulation thickness of material in the overlapping area and avoids missed spreading due to excessive spacing, ensuring the uniform distribution of the saline-alkali land remediation agent.

[0019] 2. This invention effectively solves the problem of the repair agent clumping due to moisture and being difficult to disperse by setting up an auxiliary mechanism. A dispersion cylinder is set along the dispersion path of the dispersion mechanism, and inclined dispersion blades are distributed around the outer periphery of the dispersion cylinder. When the improved repair agent clumps together due to moisture, increasing its weight and making it impossible to disperse over a long distance under the centrifugal force of the dispersion disc, these clumps will fall due to gravity and impact the rotating dispersion cylinder. The dispersion blades not only physically break up the clumps, refining the repair agent, but also use the thrust generated by rotation to throw the broken repair agent a second time to both sides, further expanding the dispersion range and improving the repair effect.

[0020] 3. This invention achieves automatic switching of the scattering mode and edge operation control through the transmission cooperation of the movable baffle and the gear rack. The travel of the movable seat driving the housing causes the first and second gears on the movable baffle to mesh sequentially with the first and second racks fixed on the support plate, thereby driving the movable baffle to rotate. When the two scattering mechanisms approach each other, the movable baffle is in its initial position, shielding and constraining the area between the scattering discs to prevent excessive material overlap. When the two scattering mechanisms are moderately separated (first stage), the first gear meshes with the first rack, driving the movable baffle to rotate 45°, releasing the constraint on the middle area and preventing missed scattering. When the two scattering mechanisms continue to separate to their maximum travel (second stage), the second gear meshes with the second rack, driving the movable baffle to continue rotating to a vertical state. At this point, the movable baffle can shield materials facing outwards from the equipment, specifically for edge operations in saline-alkali land, effectively preventing the remediation agent from being scattered outside the target area, achieving precise remediation. Attached Figure Description

[0021] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the repair equipment and hopper installation of the present invention; Figure 2 This is a schematic diagram of the repair device structure of the present invention; Figure 3 This is a demonstration diagram of material scattering when the two sets of scattering discs and the dispersion cylinder of the repair device of the present invention are brought close together; Figure 4 This is a schematic diagram showing the distribution of the first drive shaft, the second drive shaft, and the positive and negative threaded rods of the present invention. Figure 5 This is a schematic diagram showing the distribution of the first drive assembly, the second drive assembly, and the pulley assembly of the present invention; Figure 6 This is a schematic diagram of the transmission component structure of the present invention; Figure 7 This is a schematic diagram showing the distribution of the second drive shaft, connecting frame, dispersing cylinder, and dispersing blades of the present invention. Figure 8 This is a schematic diagram showing the distribution of the movable disc, dispersing cylinder, spring, dispersing blades, and connecting frame of the present invention. Figure 9 This is a schematic diagram showing the distribution of the movable baffle, first gear, second gear, bearing plate, first rack, and second rack of the present invention. Figure 10 This is a diagram illustrating the rotation angle of the movable baffle when the first gear and the first rack of the present invention are engaged. Figure 11 This diagram illustrates the rotation angle of the movable baffle when the second gear and the second rack of the present invention are engaged.

[0022] In the diagram, 1. Mounting bracket; 2. Guide rail; 3. Transmission assembly; 301. Housing; 302. First fixing rod; 303. Second fixing rod; 304. Third fixing rod; 305. Bevel gear; 4. Spreading disc; 5. First drive shaft; 6. First drive assembly; 7. Positive and negative threaded rod; 8. Second drive assembly; 9. Moving seat; 10. Fixing plate; 11. Clearance groove; 12. Fixing frame; 13. Movable disc; 14. Second drive shaft; 15. Dispersion cylinder; 16. Spring; 17. Dispersion blade; 18. Connecting frame; 19. Pulley assembly; 20. Movable baffle; 21. First gear; 22. Second gear; 23. Bearing plate; 24. First rack; 25. Second rack; 26. Material discharge port; 27. Flexible discharge pipe. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] Example 1: This embodiment provides a saline-alkali land remediation device that uses acid-base adjustment, such as... Figure 3 , Figure 4 As shown, the device includes a mounting frame 1, which contains a scattering mechanism and a moving mechanism. There are two scattering mechanisms. The moving mechanism includes a second drive assembly 8, a forward and reverse threaded rod 7, and a moving seat 9. The forward and reverse threaded rod 7 is rotatably connected to the mounting frame 1. The forward and reverse threaded rod 7 includes a forward threaded part and a reverse threaded part. A moving seat 9 is threadedly connected to the forward threaded part and the reverse threaded part, respectively. Each moving seat 9 is fixedly connected to the housing 301 of a scattering mechanism. The second drive assembly 8 is used to drive the forward and reverse threaded rod 7 to rotate along its own axis.

[0025] Based on the above scheme, when the second drive component 8 operates, it drives the positive and negative threaded rods 7 to rotate. Since the threads rotate in opposite directions, the two sets of moving seats 9 will simultaneously move towards the center or simultaneously separate to the sides. The moving seats 9 drive the housing 301 of the spreading mechanism fixed to them to move synchronously, thereby achieving stepless adjustment of the distance between the two sets of spreading mechanisms. This adjustment mechanism allows the equipment to adjust the overlapping spreading area according to the physical characteristics of the repair agent (such as particle size and weight), avoiding material accumulation or missed spreading.

[0026] In this embodiment, as Figure 4 As shown, the moving mechanism also includes a guide rail 2, which is arranged axially along the positive and negative threaded rod 7. A slider is provided on the housing 301, and the slider and the guide rail 2 are slidably engaged by a tenon and mortise structure.

[0027] Based on the above scheme, to ensure the stability of the spreading mechanism during movement and prevent unnecessary rotation around the threaded rod 7, a guide rail 2 is installed parallel to the threaded rod on the inner wall or bottom of the mounting frame 1. The slider is fixed to the bottom or side of the housing 301. Specifically, the tenon and mortise structure can be designed as a dovetail groove or a T-groove structure, with the slider acting as a "tenon" that fits into the "mortise" groove of the guide rail 2. This structure restricts the vertical and lateral degrees of freedom of the housing 301, retaining only the axial degree of freedom, effectively bearing the weight of the spreading mechanism and the vibration load during operation.

[0028] In this embodiment, as Figure 6 As shown, the spreading mechanism includes a spreading disc 4, a transmission assembly 3, a first transmission shaft 5, and a first drive assembly 6. The first transmission shaft 5 is axially rotatably connected to the mounting bracket 1 along a threaded rod 7. The first drive assembly 6 is used to drive the first transmission shaft 5 to rotate. The transmission assembly 3 includes a housing 301. A first fixed rod 302, a second fixed rod 303, and a third fixed rod 304 are rotatably connected inside the housing 301. The first fixed rod 302 and the second fixed rod 303 are coaxially sleeved on the outer periphery of the first transmission shaft 5. The first fixed rod 302, the second fixed rod 304, and the third fixed rod 304 are rotatably connected inside the housing 301. All rods 303 are circumferentially fixed and axially slidably connected to the first drive shaft 5. The axis of the third fixed rod 304 is perpendicular to the axis of the first drive shaft 5. A bevel gear 305 is provided on the first fixed rod 302 or the second fixed rod 303. A bevel gear 305 is provided at one end of the third fixed rod 304. The two bevel gears 305 mesh. The other end of the third fixed rod 304 is fixedly connected to the bottom center of the spreading disc 4. The spreading disc 4 is parallel to the rotation surface of the third fixed rod 304 and is located above and outside the mounting frame 1. Multiple baffles are distributed on the upper surface of the spreading disc 4.

[0029] Based on the above scheme, the first fixed rod 302 and the second fixed rod 303, as power input ends, are equipped with corresponding keys or spline grooves inside, allowing them to rotate with the shaft and slide along the shaft. A right-angle transmission box is constructed inside the housing 301. Horizontal rotation is converted into vertical rotation by the meshing of bevel gears 305 on the first fixed rod 302 or the second fixed rod 303 in the horizontal direction and bevel gears 305 on the third fixed rod 304 in the vertical direction. The first drive assembly 6 drives the first drive shaft 5 to rotate at high speed. Regardless of the position of the housing 301 on the shaft, power can be transmitted to the bevel gear 305 set via splines, thereby driving the high-speed rotation of the dispensing disc 4 at the top of the third fixed rod 304. Baffles on the surface of the dispensing disc 4 are used to increase friction and centrifugal thrust, evenly dispensing the falling repair agent.

[0030] In this embodiment, as Figure 1 As shown, the movable seat 9 is provided with a fixed plate 10, which extends out of the upper end face of the mounting frame 1. The upper end face of the mounting frame 1 is provided with a relief groove 11 for the fixed plate 10. A material discharge port 26 is fixedly connected to the fixed plate 10. The material discharge port 26 is located directly above the spreading disc 4. The material discharge port 26 has a hollow structure. The material discharge port 26 is fixedly connected to one end of the flexible feeding pipe 27, and the other end of the flexible feeding pipe 27 is fixedly connected to the discharge port of the hopper.

[0031] Based on the above scheme, in order to ensure that the material drop point is always located at the center of the spreading plate 4, the material drop port 26 must move synchronously with the spreading plate 4. The fixing plate 10 passes through the clearance groove 11 at the top of the mounting frame 1, connecting the internal moving seat 9 and the external material drop port 26. The flexible discharge pipe 27 (such as a corrugated telescopic pipe or hose) plays a key connecting role. It can freely extend, retract, or bend as the material drop port 26 moves, ensuring that the material from the hopper always falls accurately into the center of the moving spreading plate 4, realizing the linkage between the feeding system and the moving system.

[0032] In this embodiment, as Figure 9 As shown, it also includes a movable baffle 20, which is a semi-enclosed structure. The movable baffle 20 includes a blocking part and a connecting part. The blocking part stands on the connecting part, and the bottom of the blocking part is fixedly connected to one end of the connecting part. The blocking part is located at the edge of the throwing disc 4. The connecting part is rotatably connected to the housing 301 and is coaxial with the third fixed rod 304. At least one gear is fixedly connected to the connecting part. The gear is coaxial with the connecting part. A bearing plate 23 is fixedly provided inside the mounting bracket 1. A rack corresponding to the gear is fixedly provided on the bearing plate 23 along the axial direction of the positive and negative threaded rod 7.

[0033] Based on the above scheme, this embodiment achieves automatic adjustment of the baffle angle through mechanical linkage. The movable baffle 20 is sleeved outside the third fixed rod 304 and does not rotate with the third fixed rod 304, but rotates relative to the housing 301 to adjust the angle. The rack is fixed on the stationary support plate 23, and the gear moves with the housing 301. When the housing 301 moves axially, the gear and the fixed rack move relative to each other, and the rack forces the gear to rotate, thereby driving the connecting part and the blocking part to rotate. By precisely designing the meshing position of the gear and the rack, the "translational position of the housing 301" can be directly mapped to the "rotation angle of the movable baffle 20" without the need for additional motor control.

[0034] In this embodiment, as Figure 9 As shown, the gears include a first gear 21 and a second gear 22. The module of the first gear 21 is greater than that of the second gear 22. The rack includes a first rack 24 and a second rack 25. The length of the first rack 24 is greater than that of the second rack 25. The first gear 21 and the first rack 24 mesh, and the second gear 22 meshes with the second rack 25. The first rack 24 is far away from the two ends of the trajectory of the throwing mechanism relative to the second rack 25. The first rack 24 and the second rack 25 completely avoid each other in space.

[0035] Based on the above solutions, such as Figure 3 , Figure 10 , Figure 11 As shown, this embodiment achieves complex baffle control logic through multi-stage gear and rack engagement. The system uses two sets of gears and racks with different parameters. During the first stage of the larger stroke, when the spreading mechanism moves away from each other, the first gear 21 with a larger module meshes with the longer first rack 24. The movable baffle 20 rotates approximately 45 degrees during the entire stroke. At this point, the baffle releases its obstruction of the area between the two disks, preventing spillage, while also preventing the movable baffle 20 from rotating too much, thus limiting the spreading range outside the spreading disk 4. In the second stage of the stroke, as the mechanism moves further away, it gradually approaches the end of the stroke, and this stroke is shorter than the first stage. The first gear 21 disengages, while the second gear 22 begins to mesh with the second rack 25. Due to the change in gear and rack parameters, the movable baffle 20 can rotate at a larger angle in a shorter stroke. In this stage, the movable baffle 20 continues to rotate significantly to a vertical position (approximately 90 degrees). In the vertical position, the baffle can block the spreading path towards the outside of the equipment. This segmented control allows the equipment to adapt to two working conditions: preventing spillage in the middle during normal operation and preventing spillage outside the boundary during edge operation.

[0036] In this embodiment, as Figure 5 , Figure 7As shown, it also includes an auxiliary mechanism, which includes a second drive shaft 14, a dispersing cylinder 15, and a movable disc 13. The second drive shaft 14 is rotatably connected to the mounting frame 1 along the positive and negative threaded rod 7. The movable disc 13 is fixedly sleeved on the second drive shaft 14. A dispersing cylinder 15 is symmetrically provided on both sides of the movable disc 13. The movable disc 13 is connected to the dispersing cylinder 15. The dispersing cylinder 15 is movably sleeved on the second drive shaft 14. The dispersing cylinder 15 is located in the dispersing direction of the dispersing mechanism. Multiple dispersing blades 17 are distributed on the outer peripheral surface of the dispersing cylinder 15. The dispersing blades 17 are inclined relative to the dispersing cylinder 15 in the axial and radial directions.

[0037] Based on the above solution, an auxiliary mechanism was added to the equipment to address the issue of the repair agent not being able to be dispersed far when it becomes damp and clumps. The second drive shaft 14 is parallel to the first drive shaft 5, driving the movable disc 13 and the dispersing cylinders 15 on both sides to rotate at high speed. The dispersing cylinders 15 are positioned below the trajectory of the material thrown from the dispersing disc 4. When large pieces of material fall prematurely due to insufficient centrifugal force, they directly impact the rotating dispersing cylinder 15. The dispersing blades 17 on the surface of the dispersing cylinder 15 not only physically crush the clumps but also, due to their inclined angle, generate axial and radial forces, projecting the broken material a second time to both sides. This effectively remedies the defect in dispersing clumps of material and improves the repair quality.

[0038] In this embodiment, as Figure 8 As shown, the two dispersion cylinders 15 are fixedly connected to a housing 301 via a connecting frame 18, and the dispersion cylinders 15 are connected to the movable disc 13 via a spring 16.

[0039] Based on the above scheme, since the position of the spreading mechanism is adjustable, the dispersing cylinder 15 must move with the housing 301 to maintain the correct receiving position. Therefore, the dispersing cylinder 15 is rigidly connected to the housing 301 via the connecting frame 18, and slides axially along the housing 301 on the second transmission shaft 14. The power driving the rotation of the dispersing cylinder 15 comes from the movable disc 13 fixed on the shaft. To resolve the contradiction between position change and power transmission, springs 16 are connected between the movable disc 13 and the left and right dispersing cylinders 15 respectively. The springs 16 can both transmit torque to drive the dispersing cylinder 15 to rotate and adapt to the axial distance change of the dispersing cylinder 15 as it moves with the housing 301, ensuring that the auxiliary mechanism can work normally under any spacing setting.

[0040] In this embodiment, as Figure 5 As shown, the second drive shaft 14 is connected to the first drive shaft 5 via a pulley assembly 19. Both the first drive mechanism and the second drive mechanism include a drive motor, a first drive wheel, a second drive wheel, and a drive chain. The first drive wheel is fixedly connected to the output end of the drive motor, and the second drive wheel is fixedly connected to the positive and negative threaded rod 7 or the first drive shaft 5. The first drive wheel and the second drive wheel are connected by a drive chain.

[0041] Working principle: Based on the coordinated operation of the spreading mechanism, the moving adjustment mechanism, and the auxiliary dispersing mechanism. During operation, the repair agent material enters the hollow discharge port 26 through the hopper and the flexible discharge pipe 27 with telescopic capability, and finally falls accurately onto the high-speed rotating spreading disc 4. The transmission path of the spreading power is as follows: the first drive component 6 drives the first drive shaft 5 that runs horizontally through the mounting frame 1 to rotate through the transmission chain, which in turn drives the first fixed rod 302 and the second fixed rod 303, which are sleeved on its outer periphery and can slide axially, to rotate synchronously; inside the housing 301, the horizontal rotational power is converted into vertical power through the meshing and reversing of the bevel gear 305 group, driving the third fixed rod 304 and the top spreading disc 4 to rotate, and using centrifugal force to evenly spread the repair agent in all directions.

[0042] To adapt to materials with varying moisture levels and control the overlap of spreading, the equipment utilizes a moving mechanism to adjust the distance between the two sets of spreading discs 4. The second drive assembly 8 drives the forward and reverse threaded rods 7 to rotate, using their oppositely helical thread structure to drive the two moving seats 9, which in turn move the corresponding housings 301 and the entire spreading mechanism synchronously towards each other or away from each other along the guide rail 2. During this adjustment process, the angle control mechanism of the movable baffle 20 is automatically triggered, requiring no additional power. Utilizing the travel of the housing 301, the gears on the connecting part mesh sequentially with the rack fixed to the support plate 23: initially, as the two discs move away from each other, the first gear 21 meshes with the first rack 24, driving the movable baffle 20 to rotate approximately 45 degrees, removing the obstruction of the central area to prevent spillage; as it continues to move away to its maximum travel (e.g., in edge operation mode), the second gear 22 meshes with the second rack 25, driving the baffle to continue rotating to a vertical position, thereby blocking the spreading path towards the outside of the equipment and preventing the remediation agent from spilling beyond the boundary of the saline-alkali land.

[0043] To address the issue of the repair agent clumping due to moisture and falling prematurely due to its large weight and insufficient centrifugal force, an auxiliary mechanism was implemented. The first drive shaft 5 synchronously drives the second drive shaft 14 below it via a pulley assembly 19, which in turn drives the movable disc 13 and the dispersing cylinder 15 mounted on the shaft to rotate at high speed. When large pieces of material fall and impact the dispersing cylinder 15 located below the throwing path, the inclined dispersing blades 17 on the cylinder wall physically break up the clumps, and the rotational force propels the broken material to the sides a second time. The dispersing cylinder 15 is rigidly connected to the housing 301 via a connecting frame 18, and with the extension and retraction of the spring 16, ensures that the dispersing cylinder 15 not only moves synchronously with the throwing mechanism but also maintains rotational power throughout its movement, thus guaranteeing the continuity and uniformity of the repair operation.

[0044] Example 2 Please see Figures 1-11A saline-alkali land remediation device using acid-base adjustment. The device includes a mounting frame 1 connected to a hopper. A guide rail 2 is provided on the inner side of the mounting frame 1. Two sets of transmission components 3 are slidably mounted on the top of the guide rail 2. Each transmission component 3 includes a housing 301. A first fixed rod 302, a second fixed rod 303, and a third fixed rod 304 are rotatably connected inside the housing 301. The second fixed rod 303 and the third fixed rod 304 are connected by a bevel gear 305. A spreading disc 4 is connected to the top of the third fixed rod 304. Two sets of transmission components 3 are symmetrically arranged, allowing the two sets of spreading discs 4 to rotate relative to each other. A first transmission shaft 5 is rotatably connected to the inner side of the mounting frame 1. The first transmission shaft 5 is a square transmission shaft. The first transmission shaft 5 and the first fixing rod 302 and the second fixing rod 303 of the two sets of transmission components 3 are movably connected through it. One end of the first transmission shaft 5 is connected to a first drive component 6. A positive and negative threaded rod 7 is rotatably connected to the inner side of the mounting frame 1. One end of the positive and negative threaded rod 7 is connected to a second drive component 8, and the external threads of the positive and negative threaded rod 7 are connected to two... Two sets of movable seats 9 are connected to two sets of transmission components 3 respectively, and fixed plates 10 extend from the sides of both sets of movable seats 9. Each set of fixed plates 10 has a material discharge port 26 on its side, which is connected to a hopper via a flexible discharge pipe 27. Movable baffles 20 are rotatably connected to the top of each set of transmission components 3. A first gear 21 and a second gear 22 are provided at the bottom of the movable baffles 20. A bearing plate 23 is provided on the inner side of the mounting frame 1, and a first rack 24 and a second rack are provided on the side of the bearing plate 23. 25. The stroke of the first rack 24 is longer than that of the second rack 25. When the first gear 21 and the first rack 24 mesh, the movable baffle 20 can rotate 45°. When the second gear 22 and the second rack 25 mesh, the movable baffle 20 can also rotate 45°. For example, when the first gear 21 and the first rack 24 mesh, they occupy 3 / 4 of the total stroke of the distance expansion, and the movable baffle 20 can rotate 45°. When the second gear 22 and the second rack 25 mesh, they occupy 1 / 4 of the stroke of the distance expansion, and the movable baffle 20 can also rotate 45°.

[0045] Please refer to the above embodiments for further details. Figure 2 The top of the mounting bracket 1 is provided with a clearance groove 11. The clearance groove 11 is used to allow the movement of the two sets of fixing plates 10 to be avoided. By setting the clearance groove 11, the movement of the two sets of fixing plates 10 is not interfered with, so that the movement of the two sets of fixing plates 10 can also drive the movement of the two sets of material discharge ports 26.

[0046] Please refer to the above embodiments for further details. Figure 5 and Figure 7The mounting bracket 1 has a fixed bracket 12 on its inner side. The fixed bracket 12 is rotatably connected to a movable disc 13. The mounting bracket 1 also has a second drive shaft 14 rotatably connected to its inner side. The second drive shaft 14 is a square drive shaft. The second drive shaft 14 and the first drive shaft 5 are connected by a pulley assembly 19. The pulley assembly 19 connects the first drive shaft 5 and the second drive shaft 14, so that the first drive assembly 6 can drive the first drive shaft 5 and the second drive shaft 14 to rotate. The rotation of the second drive shaft 14 can drive the movable disc 13 to rotate.

[0047] Please refer to the above embodiments for further details. Figure 8 Two sets of dispersion cylinders 15 are sleeved on the outside of the second drive shaft 14. The two sets of dispersion cylinders 15 are symmetrically arranged about the movable disk 13, and the interior of each set of dispersion cylinders 15 is connected to the movable disk 13 by a spring 16. By connecting the dispersion cylinders 15 and the movable disk 13 by the spring 16, the rotation of the second drive shaft 14 can simultaneously drive the movable disk 13, the spring 16 and the dispersion cylinders 15 to rotate. The position of the dispersion cylinders 15 can be adjusted by stretching the spring 16.

[0048] Please refer to the above embodiments for further details. Figure 7 Both sets of dispersion cylinders 15 are equipped with multiple sets of dispersion blades 17 on their exterior. The dispersion blades 17 are inclined. When the dispersion cylinder 15 rotates, it drives the dispersion blades 17 to rotate, which can impact and scatter the repair agent, causing it to be thrown to both sides of the repair equipment. By setting multiple sets of inclined dispersion blades 17 on the exterior of the dispersion cylinder 15, and setting the dispersion angle towards both sides of the scattering plate 4, the dispersion cylinder 15 rotates and the dispersion blades 17 rotate, which can not only directionally scatter the blocky repair agent, but also impact and break it.

[0049] Please refer to the above embodiments for further details. Figure 7 Both sets of dispersion cylinders 15 are rotatably connected to the ends of the two sets of dispersion cylinders 15. The two sets of connecting frames 18 are used to connect the two sets of transmission components 3 respectively. By setting the connecting frames 18 to support the two ends of the dispersion cylinders 15, the stability of the dispersion cylinders 15 installation can be improved.

[0050] Please refer to the above embodiments for further details. Figure 2 The top of the spreading disc 4 has multiple sets of arc-shaped baffles evenly distributed to drive the repair agent to rotate and spread.

[0051] Please refer to the above embodiments for further details. Figure 1 The hopper is equipped with a conveying device for the repair agent and is connected to agricultural machinery. By setting up the conveying device, the repair agent in the hopper can move to the flexible discharge pipe 27. The flexible discharge pipe 27 can be made of corrugated pipe or flexible cloth bag.

[0052] A method for using equipment for the remediation of saline-alkali land through acid-base adjustment, the process of which includes the following steps: S1: First, start the first drive assembly 6 to drive the first transmission shaft 5 to rotate. The first transmission shaft 5 drives the first fixed rod 302 and the second fixed rod 303 of the transmission assembly 3 to rotate. The second fixed rod 303 drives the third fixed rod 304 to rotate through the bevel gear 305. The third fixed rod 304 drives the spreading disc 4 to rotate. S2: At the same time, the rotation of the first drive shaft 5 drives the rotation of the second drive shaft 14, the second drive shaft 14 drives the dispersion cylinder 15 to rotate, and the dispersion cylinder 15 drives the multiple sets of dispersion blades 17 distributed outside it to rotate. S3: Next, start the agricultural machinery and equipment to move the hopper and the repair equipment slowly in the saline-alkali land. Start the conveying device in the hopper and push the repair agent to the top of the flexible discharge pipe 27 through the conveying device. The repair agent falls from the discharge port 26 through the flexible discharge pipe 27 to the top of the spreading plate 4. Under the rotation of the spreading plate 4, the repair agent is scattered to both sides by centrifugal force. S4: At the same time, the rotation of the dispersion cylinder 15 drives the dispersion blades 17 to rotate, which impacts and breaks up some of the larger blocky repair agents and pushes them to both sides of the spreading disc 4.

[0053] In practical operation, the present invention works as follows: an agricultural vehicle towing a hopper travels at a constant speed within saline-alkali land. The first drive assembly 6 is activated, driving the first transmission shaft 5 to rotate. The first transmission shaft 5 drives the first fixed rod 302 and the second fixed rod 303 of the transmission assembly 3 to rotate. The second fixed rod 303 drives the third fixed rod 304 to rotate via a bevel gear 305. The third fixed rod 304 drives the connected spreading disc 4 to rotate. Simultaneously, the rotation of the first transmission shaft 5 drives the second transmission shaft 14 to rotate via a pulley assembly 19. The second transmission shaft 14 drives the movable disc 13 to rotate, and also drives the dispersing cylinder 15 sleeved on its exterior to rotate. The conveying device inside the hopper pushes the remediation agent into the flexible feeding pipe. Directly above 27, the repair agent falls through the flexible feed pipe 27 and is discharged from the discharge port 26, falling onto the spreading disc 4. The two sets of spreading discs 4 rotate and use centrifugal force to spread the repair agent on top. At this time, the two sets of spreading discs 4 are in a state of close proximity to each other, and the two sets of movable baffles 20 are also in a state of horizontal placement. The edges of the movable baffles 20 can constrain the middle of the two sets of spreading discs 4, reducing the overlapping of the repair agent. Some of the repair agent that has agglomerated into relatively large lumps will fall to the location of the dispersion cylinder 15 due to its own gravity. The dispersion cylinder 15 rotates and uses the dispersion blades 17 to impact and break up these large pieces of repair agent, and pushes them tilted to both sides.

[0054] During the repair equipment's scattering process, observe the overlap of the scattering materials on the two sets of scattering discs 4. If the repair agent overlaps or is too thick, activate the second drive assembly 8 to rotate the positive and negative threaded rods 7, thereby moving the two sets of moving seats 9 away from each other. This, in turn, causes the two sets of material discharge ports 26 to move away from each other via the fixing plate 10, and also moves the two sets of transmission assemblies 3 away from each other. The first fixing rod 302 and the second fixing rod 303 of the transmission assembly 3 slide outside the first transmission shaft 5, causing the two sets of scattering discs 4 to move away from each other. Furthermore, the two sets of dispersing cylinders 15 move away from each other via the connecting frame 18. The dispersing cylinders 15 slide outside the second transmission shaft 14, stretching the spring 16, and in the transmission... During the movement of component 3, the movable baffle 20 will also move, causing the first gear 21 and the first rack 24 at the bottom of the movable baffle 20 to mesh, allowing the movable baffle 20 to slowly adjust its angle. During this process, the movable baffle 20 moves a large distance and the angle adjustment range is small. For example, by adjusting the size and gear ratio of the first gear 21, the second gear 22, the first rack 24 and the second rack 25, the first gear 21 and the first rack 24 are meshed and occupy 3 / 4 of the total distance expansion stroke, and the movable baffle 20 can rotate 45°. When the second gear 22 and the second rack 25 are meshed and occupy 1 / 4 of the distance expansion stroke, the movable baffle 20 can also rotate 45°. The two sets of movable baffles 20 are slowly adjusted at a certain angle to reduce the constraint on the middle of the two sets of spreading discs 4. The two sets of spreading discs 4 are directly away from each other, which will reduce the phenomenon of overlapping in the middle. However, if the two sets of movable baffles 20 are still in a horizontal state and the distance between the two sets of spreading discs 4 is too far, it will cause the middle of the two sets of spreading discs 4 to be unable to be spread. Therefore, the movable baffles 20 are rotated synchronously and slowly adjusted at a certain angle to reduce the constraint on the middle of the two sets of spreading discs 4, so that the repair agent can be partially tilted towards the middle for spreading.

[0055] Furthermore, when the repair equipment needs to spread the agent at the edge of the saline-alkali land, the positive and negative threaded rods 7 are continuously controlled to rotate, causing the first gear 21 and the first rack 24 at the bottom of the movable baffle 20 to disengage, and the second gear 22 and the second rack 25 to mesh. At this time, the transmission component 3 moves a short distance, allowing the movable baffle 20 to rotate at a large angle, directly allowing the movable baffle 20 to rotate to a vertical state. The movable baffle 20 is used to constrain both sides of the spreading disc 4, so that when the spreading disc 4 is working, the repair agent is reduced from being spread to areas outside the saline-alkali land.

[0056] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for remediating saline-alkali land through acid-base adjustment, characterized in that, The device includes a mounting frame (1), which contains a scattering mechanism and a moving mechanism. There are two scattering mechanisms. The moving mechanism includes a second drive assembly (8), a positive and negative threaded rod (7), and a moving seat (9). The positive and negative threaded rod (7) is rotatably connected to the mounting frame (1). The positive and negative threaded rod (7) includes a positive thread and a negative thread. A moving seat (9) is threadedly connected to the positive thread and the negative thread respectively. Each moving seat (9) is fixedly connected to the housing (301) of a scattering mechanism. The second drive assembly (8) is used to drive the positive and negative threaded rod (7) to rotate along its own axis.

2. The device according to claim 1, characterized in that, The moving mechanism also includes a guide rail (2), which is axially arranged along the positive and negative threaded rod (7). The housing (301) is provided with a slider, which slides into the guide rail (2) through a tenon and mortise structure.

3. The device according to claim 1, characterized in that, The scattering mechanism includes a scattering disc (4), a transmission assembly (3), a first transmission shaft (5), and a first drive assembly (6). The first transmission shaft (5) is axially rotatably connected to the mounting bracket (1) along a positive and negative threaded rod (7). The first drive assembly (6) is used to drive the first transmission shaft (5) to rotate. The transmission assembly (3) includes a housing (301). A first fixed rod (302), a second fixed rod (303), and a third fixed rod (304) are rotatably connected inside the housing (301). The first fixed rod (302) and the second fixed rod (303) are coaxially sleeved on the outer periphery of the first transmission shaft (5). The fixing rods (303) are all circumferentially fixed and axially slidably connected to the first transmission shaft (5). The axis of the third fixing rod (304) is perpendicular to the axis of the first transmission shaft (5). The first fixing rod (302) or the second fixing rod (303) is provided with a bevel gear (305). One end of the third fixing rod (304) is provided with a bevel gear (305). The two bevel gears (305) mesh. The other end of the third fixing rod (304) is fixedly connected to the bottom center of the spreading disc (4). The spreading disc (4) is parallel to the rotation surface of the third fixing rod (304) and is located above the outside of the mounting frame (1). Multiple baffles are distributed on the upper surface of the spreading disc (4).

4. The device according to claim 3, characterized in that, The movable seat (9) is provided with a fixed plate (10), the fixed plate (10) extends out of the upper end face of the mounting frame (1), the upper end face of the mounting frame (1) is provided with a clearance groove (11) for the fixed plate (10), the fixed plate (10) is fixedly connected with a discharge port (26), the discharge port (26) is located directly above the scattering plate (4), the discharge port (26) is a hollow structure, the discharge port (26) is fixedly connected to one end of the flexible discharge pipe (27), and the other end of the flexible discharge pipe (27) is fixedly connected to the discharge port of the hopper.

5. The device according to claim 3, characterized in that, It also includes a movable baffle (20), which is a semi-enclosed structure. The movable baffle (20) includes a shielding part and a connecting part. The shielding part stands on the connecting part. The bottom of the shielding part is fixedly connected to one end of the connecting part. The shielding part is located at the edge of the throwing disc (4). The connecting part is rotatably connected to the housing (301) and coaxial with the third fixed rod (304). At least one gear is fixedly connected to the connecting part. The gear is coaxial with the connecting part. A bearing plate (23) is fixedly provided inside the mounting bracket (1). A rack corresponding to the gear is fixedly provided on the bearing plate (23) along the axial direction of the positive and negative threaded rod (7).

6. The device according to claim 5, characterized in that, The gears include a first gear (21) and a second gear (22), the module of the first gear (21) is greater than the module of the second gear (22), the rack includes a first rack (24) and a second rack (25), the length of the first rack (24) is greater than the length of the second rack (25), the first gear (21) and the first rack (24) mesh, the second gear (22) meshes with the second rack (25), the first rack (24) is far away from the two ends of the trajectory of the throwing mechanism relative to the second rack (25), and the first rack (24) and the second rack (25) completely avoid each other in space.

7. The device according to claim 3, characterized in that, It also includes an auxiliary mechanism, which includes a second drive shaft (14), a dispersing cylinder (15), and a movable disc (13). The second drive shaft (14) is axially rotatably connected to the mounting frame (1) along the positive and negative threaded rod (7). The movable disc (13) is fixedly sleeved on the second drive shaft (14). A dispersing cylinder (15) is symmetrically provided on both sides of the movable disc (13). The movable disc (13) is connected to the dispersing cylinder (15). The dispersing cylinder (15) is movably sleeved on the second drive shaft (14). The dispersing cylinder (15) is located in the dispersing direction of the dispersing mechanism. A plurality of dispersing blades (17) are distributed on the outer peripheral surface of the dispersing cylinder (15). The dispersing blades (17) are axially and radially inclined relative to the dispersing cylinder (15).

8. The device according to claim 7, characterized in that, The two dispersion cylinders (15) are fixedly connected to a housing (301) respectively by a connecting frame (18), and the dispersion cylinders (15) are connected to the movable disc (13) by a spring (16).

9. The device according to claim 7, characterized in that, The second drive shaft (14) is connected to the first drive shaft (5) via a pulley assembly (19).

10. The device according to claim 3, characterized in that, The first drive mechanism (6) and the second drive mechanism (8) both include a drive motor, a first transmission wheel, a second transmission wheel, and a transmission chain. The first transmission wheel is fixedly connected to the output end of the drive motor, and the second transmission wheel is fixedly connected to the positive and negative threaded rod (7) or the first transmission shaft (5). The first transmission wheel and the second transmission wheel are connected by a transmission chain.

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