Modular ridge-planting combined seed and fertilizer drill suitable for sticky and wet soil

Abstract

The invention discloses a modular ridge planting combined seed and fertilizer drill suitable for sticky and wet soil, and belongs to the technical field of agricultural machinery, the modular ridge planting combined seed and fertilizer drill comprises a main rack, and a rotary ditching and ridging unit, a terrain sensing unit, an active furrow finishing unit, a seed and fertilizer separate application unit and an integrated electro-hydraulic control unit which are sequentially arranged along the operation direction, and a transfer case is arranged at the front part of the main rack; power of a PTO output shaft of the tractor is received and divided to supply energy. The seeder can complete the integrated operation of ditching, ridging, shaping, fertilizing and seeding at one time; through cooperation of terrain perception and dynamic finishing, the furrow forming precision is guaranteed, precise deep application and precise sowing are achieved through the seed and fertilizer separate application unit, the operation efficiency and quality are improved, and an efficient mechanical solution is provided for rice-wheat crop rotation ridge planting.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a modular ridge-planting fertilizer and seeder suitable for sticky and moist soil. Background Technology

[0002] Rice-wheat rotation is an important planting pattern in southern my country. However, the soil in rice stubble fields is sticky and loose in structure. After being soaked during the rice season, the original furrows are easily damaged. In addition, the soil has strong cohesion and low shear strength, which brings many problems to wheat ridge planting.

[0003] Existing wheat planters have the following shortcomings: First, they are limited in function, requiring multiple field operations for ditching, ridging, fertilizing, and sowing, which not only damages the soil structure but also leads to low operational efficiency. Second, they have poor adaptability to sticky and wet soils, with parts easily getting stuck in mud and grass, resulting in low precision in furrow formation and difficulty in meeting the agronomic standards of rice-wheat intercropping systems. Third, they lack dynamic control capabilities, making it impossible to accurately repair damaged furrows, and inconsistent seed and fertilizer application depths affect wheat emergence rate and growth quality. Fourth, the coordination between different work units is poor, power transmission is unstable, and the operational qualification rate is difficult to guarantee.

[0004] To address the aforementioned issues, there is an urgent need to develop an integrated, intelligent, and highly adaptable seeding equipment that can achieve integrated operations of furrow reconstruction and precise seed and fertilizer application in sticky and wet soil, thus meeting the needs of large-scale agricultural production. Summary of the Invention

[0005] The purpose of this invention is to provide a modular ridge-planting fertilizer and seeder suitable for sticky and moist soil, which can realize one-time continuous operation of "ditching-ridge-shaping-fertilizing-sowing", improve the adaptability and operation quality of sticky and moist soil, support multi-mode operation switching, and meet the agronomic requirements of rice-wheat furrow intercropping system.

[0006] To achieve the above objectives, the present invention provides a modular ridge-planting and fertilizing seeder suitable for sticky and moist soil, comprising a main frame, wherein the main frame is arranged sequentially from front to back along the working direction as a rotary furrowing and ridging unit, a terrain sensing unit, an active furrow finishing unit, a seed and fertilizer dispensing unit, and an integrated electro-hydraulic control unit; a transfer case is fixed on the side of the main frame near the tractor, the input shaft of the transfer case is connected to the PTO output shaft of the tractor, and the transfer case outputs power in two directions; the rotary furrowing and ridging unit completes the cutting, lifting, side throwing, and preliminary shaping of sticky and moist soil; the terrain sensing unit detects the furrow terrain and outputs a repair control quantity; the active furrow finishing unit dynamically refines the furrows according to the control quantity; the seed and fertilizer dispensing unit realizes precise sowing and deep fertilization of wheat; and the integrated electro-hydraulic control unit realizes the coordinated control of each unit.

[0007] Preferably, the transfer case is fixedly connected to the mounting plate at the front of the main frame, and the mounting plate is fixedly connected to the main frame; the PTO output shaft is rigidly connected to the input shaft of the transfer case through a universal joint drive shaft; one output shaft of the transfer case is connected to the power transmission shaft of the rotary ditching and ridging unit, and the other output shaft is coaxially connected to the input shaft of the integrated electro-hydraulic control unit to supply power to the hydraulic components of the whole machine.

[0008] Preferably, the rotary ditching and ridging unit is hinged to the front of the main frame via a three-point suspension frame. The three-point suspension frame is equipped with an independent hydraulic cylinder to realize lifting adjustment and switching between transport states. The rotary ditching and ridging unit includes a rotary cutter roller, which is a through-shaft design. The surface of the rotary cutter roller is provided with cutters. The cutters include several sets of evenly arranged spiral ditching components. The spiral ditching components include cutter discs arranged symmetrically on the left and right sides, and curved cutters arranged in double spirals are provided between the cutter discs. The rotary ditching and ridging unit also includes a preliminary forming structure, which is located behind the rotary cutter roller and is adapted to the spiral ditching assembly. The preliminary forming structure consists of a curved soil dividing plate and a preliminary shaping grid on the ridge top. The curved soil dividing plate is installed in an inverted V-shape and the opening width is adjustable. The preliminary shaping grid on the ridge top is composed of an arc-shaped fence.

[0009] Preferably, the terrain sensing unit includes a lidar, which is fixed to the crossbeam of the main frame via a bracket; the terrain sensing unit has a built-in industrial computer, which communicates with an integrated electro-hydraulic control unit via a cable.

[0010] Preferably, the active furrow finishing unit is fixedly connected to the middle of the main frame by bolts. The active furrow finishing unit includes several sets of evenly arranged furrow finishing components. The furrow finishing components are adapted to the preliminary forming structure. Each set of furrow finishing components includes an electro-hydraulic servo cylinder, a hydraulic motor, an active contour scraper, a double-helix soil collector-distributor, and a lateral soil throwing and compaction component. The active contour scraper is a curved steel plate, and the compaction assembly is a pair of V-shaped compaction wheels. The active contour scraper and the compaction assembly are driven by the electro-hydraulic servo cylinder. The double-helix soil collector-distributor consists of a pair of left-handed and right-handed short helices and is driven by the hydraulic motor. The hydraulic motor and electro-hydraulic servo cylinder of the active furrow finishing unit are connected to the integrated electro-hydraulic control unit through an oil circuit.

[0011] Preferably, the seed and fertilizer dispensing units are fixedly connected to the rear of the main frame via a rigid crossbeam, and the seed and fertilizer dispensing units are evenly arranged side by side on the rigid crossbeam; each seed and fertilizer dispensing unit includes a fertilization unit and a sowing unit, the fertilization unit uses a fertilizer shovel and a fertilizer applicator, and the fertilizer pipe outlet of the fertilizer applicator is located behind the tip of the fertilizer shovel; the sowing unit is located to the side and rear of the fertilizer shovel, and uses a narrow double-disc furrow opener and a pneumatic centralized sowing system, the pneumatic centralized sowing system includes a blower and a sowing solenoid valve, the blower is connected to the transfer case via a drive shaft to obtain power, the sowing unit solenoid valve is connected to the integrated electro-hydraulic control unit via a cable, and the sowing unit controls the sowing depth via a depth limiting wheel.

[0012] Preferably, the integrated electro-hydraulic control unit includes a controller, a hydraulic system, and an electrical control system; the controller is integrated into a control box on the side of the main frame; the hydraulic system includes a hydraulic pump group and an oil tank, the hydraulic pump group and the oil tank being fixedly connected to the same side of the main frame; the hydraulic pump group provides an independent control circuit for the electro-hydraulic servo cylinder of the active furrow finishing unit and the independent hydraulic cylinder of the three-point suspension frame, and the hydraulic system is equipped with an air-cooled hydraulic oil radiator; the electrical control system is integrated into the control box, the PLC of the electrical control system is equipped with a digital / analog module connected to the rotary furrowing and ridging unit, and the HMI of the electrical control system is equipped with a furrowing unit monitoring page for setting furrowing depth and furrow specification parameters.

[0013] Therefore, the present invention employs the above-mentioned modular ridge-planting fertilization and seeding machine suitable for sticky and moist soil, which has the following technical effects: (1) This invention integrates five processes of ditching, ridging, shaping, fertilizing and sowing into a one-time continuous operation, eliminating the need for multiple field visits, avoiding secondary damage to the structure of sticky and wet soil, and improving work efficiency.

[0014] (2) The rotating cutter roller of the present invention adopts a large diameter design, the cutter is equipped with a wear-resistant and non-stick structure, and each part in contact with the soil is coated with a non-stick coating, which effectively solves the problems of sticky soil, mud and grass entanglement, and ensures smooth operation.

[0015] (3) The present invention achieves millimeter-level shaping of furrows through real-time detection by the terrain sensing unit and dynamic repair by the active furrow shaping unit. The shaping accuracy meets the agronomic standards of the rice-wheat furrow intercropping system, providing good conditions for wheat growth.

[0016] (4) The present invention realizes power distribution through the transfer box and integrates the electro-hydraulic control system to coordinate the work of each unit, ensuring accurate application depth of seeds and fertilizers, stable operation parameters, and improving the qualification rate of operation.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a modular ridge-planting fertilizer-seeding machine suitable for sticky and moist soil according to the present invention; Figure 2 This is a side view of a modular ridge-planting fertilizer-seeding machine suitable for sticky and moist soil according to the present invention; Figure 3 This is a bottom view of a modular ridge-planting fertilizer-seeding machine suitable for sticky and moist soil according to the present invention; Figure 4 This is a schematic diagram of the rotating furrowing and ridging unit structure in a modular ridge-planting fertilizer seeder suitable for sticky and moist soil according to the present invention.

[0019] Figure Labels 1. PTO output shaft; 2. Main frame; 3. Transfer case; 4. Rotary furrowing and ridging unit; 41. Three-point suspension frame; 42. Rotary cutter roller; 43. Spiral furrowing assembly; 431. Cutter head; 432. Curved cutter; 44. Preliminary shaping structure; 441. Curved soil separating plate; 442. Preliminary ridge top shaping grid; 5. Terrain sensing unit; 51. LiDAR; 6. Active furrow finishing unit; 61. Furrow finishing assembly; 62. Active contour scraper; 63. Double spiral soil collector-distributor; 64. Compactor assembly; 7. Seed and fertilizer application unit; 71. Fertilizer application unit; 711. Fertilizer shovel; 712. Fertilizer applicator; 72. Seeding unit; 721. Narrow double-disc furrow opener; 722. Pneumatic centralized seeding system; 8. Integrated electro-hydraulic control unit; 81. Controller; 82. Hydraulic system; 821. Hydraulic pump set; 822. Oil tank; 83. Control box. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 4 As shown, a modular ridge-planting and fertilizing seeder suitable for sticky and moist soil includes a main frame 2. The main frame 2 is equipped with a rotary furrowing and ridging unit 4, a terrain sensing unit 5, an active furrow finishing unit 6, a seed and fertilizer dispensing unit 7, and an integrated electro-hydraulic control unit 8, arranged sequentially from front to back along the working direction. The main frame 2 is located behind the tractor, and the tractor's PTO output shaft 1 provides power to the entire machine. The transfer case 3 is fixed to the front of the main frame 2 near the tractor via a mounting plate. The input shaft of the transfer case 3 is connected to the tractor's PTO output shaft 1, and the transfer case 3 outputs power in two paths.

[0023] Transfer case 3 is fixed to the δ=16mm Q345 steel plate mounting plate at the front of the main frame 2 by 8 sets of M16×40 bolts. The mounting plate is welded to the rectangular tube of the main frame 2 as a whole. The PTO output shaft 1 of the tractor is rigidly connected to the input shaft of transfer case 3 through a heavy-duty cross shaft universal joint drive shaft with a safety clutch. The torque setting value of the safety clutch is 2000 N·m. One output shaft of transfer case 3 is connected to the power transmission shaft of the rotary ditching and ridging unit 4 through a spline sleeve. A sliding spline is set to compensate for the relative displacement during operation. The other output shaft is coaxially connected to the input shaft of the hydraulic pump group 821 of the integrated electro-hydraulic control unit 8 to supply power to the hydraulic components of the whole machine.

[0024] The rotary ditching and ridging unit 4 is hinged to the front of the main frame 2 via a three-point suspension frame 41 welded from 120×80×8 rectangular tubes. The three-point suspension frame 41 is equipped with an independent hydraulic cylinder with a stroke of 300mm. The rotary cutter roller 42 of the rotary ditching and ridging unit 4 is a through-shaft design with a shaft diameter of Φ100mm. The material is 42CrMo, which has undergone quenching and tempering treatment. The roller body is a steel pipe with a thickness of δ=16mm and an outer diameter of Φ400mm. An arc-shaped cover with a thickness of δ=3mm is installed above the cutter roller, and a reinforced side plate with a thickness of δ=8mm is installed at the rear to form a semi-enclosed working chamber to guide the soil flow. The surface of the rotary cutter roller 42 is provided with four sets of evenly arranged spiral ditching components 43. Each set of spiral ditching components 43 includes a cutter disc 431 symmetrically arranged on the left and right sides. The cutter disc 431 has an outer diameter of Φ400mm. m, thickness δ=20mm, helix angle 60°, outer edge overlaid with D-707 wear-resistant welding rod and inlaid with 15×15×10mm YG8 hard alloy block; between each pair of corresponding cutter discs 431, there are 12 IT245 type curved blades 432 arranged in double helix, the blade handle section of the curved blade 432 is 25×60mm, the material is 65Mn, and the cutting edge quenching hardness is HRC50-55; behind the rotating cutter roller 42, there is a preliminary forming structure 44, including a pair of curved soil separating plates 441 made of δ=10mm Q345 steel plate and a ridge top preliminary shaping grid 442 made of Φ12mm round steel; the surface of the curved soil separating plate 441 is coated with UHMW-PE, installed in an inverted V shape, the opening width is adjustable from 30-35cm, and it is used to sort and initially compact the ridge top soil.

[0025] The core component of the terrain sensing unit 5 is the RoboSenseRS-LiDAR-M1 multi-line mechanical lidar 51. The lidar 51 has the following detection performance: scanning frequency of 10Hz, field of view of 120°, forward detection distance of 5m, and terrain profile point cloud density of ≥200 points / square meter. The lidar 51 is fixed to the crossbeam of the main frame 2 1 meter behind the cover of the rotating furrowing and ridging unit 4 via a bracket, at a height of 1.5m above the ground. The lidar 51 is equipped with a stainless steel protective net and a positive pressure air cleaning system. The terrain sensing unit 5 has a built-in Intel NUC industrial computer that runs a real-time point cloud processing algorithm. After comparing it with the preset G1 furrow 3D model (40cm wide ridge top, 30cm wide furrow bottom, 15cm high ridge, and 71.6° slope), it outputs a control quantity within 100ms and communicates with the integrated electro-hydraulic control unit 8 via a cable.

[0026] The active furrow finishing unit 6 is bolted to the middle of the main frame 2. The active furrow finishing unit 6 includes several evenly arranged furrow finishing components 61. The furrow finishing components 61 are adapted to the preliminary forming structure 44. Each furrow finishing component 61 includes an electro-hydraulic servo cylinder, a hydraulic motor, a curved active contour scraper 62, a double-spiral soil collector-distributor 63, and a compaction component 64. The curved active contour scraper 62 has a height of 40cm × width of 60cm and is coated with UHMW-PE. The double-spiral soil collector... - The soil separator 63 has a diameter of 300mm, a pitch of 150mm, and a length of 800mm, with one left-handed and one right-handed screw; the compaction assembly 64 is a V-shaped compaction wheel with a diameter of 450mm and a width of 100mm; the electro-hydraulic servo cylinder drives the active contour scraper 62 and the V-shaped compaction assembly 64 to achieve a vertical displacement of ±15cm with a response time of <0.2s; the hydraulic motor drives the double-helix soil collector-splitter 63 with an adjustable speed of 0-100rpm; the compaction assembly 64 ensures that the soil bulk density reaches 1.30-1.35g / cm³. 3 The hydraulic motor and electro-hydraulic servo cylinder are connected to the hydraulic pump group 821 of the integrated electro-hydraulic control unit 8 via oil circuits, and the control signal cable is connected to the integrated electro-hydraulic control unit 8.

[0027] The seed and fertilizer application unit 7 is fixedly connected to the rear of the main frame 2 via a rigid crossbeam. Three sets of seed and fertilizer application units 7 are installed side-by-side on the crossbeam, corresponding to three rows of wheat per ridge. Each set of seed and fertilizer application units 7 includes a fertilization unit 71 and a sowing unit 72. The fertilization unit 71 uses a chisel-shaped deep fertilizer shovel and an outer grooved wheel-type fertilizer applicator 711. The fertilizer shovel 712 has a laser-coated hard alloy surface and an outer grooved wheel-type fertilizer applicator 711. 712 is equipped with a 28mm diameter thick-walled fertilizer pipe, with the outlet located 50mm behind the shovel tip. At a depth of 10.0±0.5cm; the sowing unit 72 is located 8.0±0.3cm behind the fertilizer shovel, and uses a narrow double-disc furrow opener 721 with a diameter of 320mm and an included angle of 13°. The sowing depth is controlled by a depth limiting wheel to 3.0±0.3cm. The seeding adopts a pneumatic centralized seeding system 722, which includes a fan and a sowing solenoid valve. The fan is connected to the transfer box 3 through a drive shaft to obtain power, and the sowing solenoid valve is connected to the integrated electro-hydraulic control unit 8 through a cable.

[0028] The controller 81 of the integrated electro-hydraulic control unit 8 is a Siemens S7-1500 series PLC, equipped with a touch screen, and integrated into the control box 822 oil tank 83 on the side of the middle of the main frame 2; the hydraulic system 82 includes a variable displacement piston pump with a displacement of 45ml / r and an 80L oil tank. The variable displacement piston pump pressure is set to 21Mpa. The hydraulic system 82 provides independent control circuits for the lifting cylinders of the furrowing and ridging unit, the electro-hydraulic servo cylinders of the finishing unit, and the hydraulic motors. It is equipped with an air-cooled hydraulic oil radiator to ensure that the oil temperature is ≤65℃; the PLC of the electrical control system adds digital / analog modules, connects to the speed and depth sensors of the furrowing unit, integrates three operating mode state machines, and adds a furrowing unit monitoring page to the HMI, which can set the furrowing depth and furrow specification parameters. The whole machine supports the ISOBUS Class III protocol.

[0029] Working principle: During operation, the tractor pulls the main frame 2, and the tractor's PTO output shaft 1 transmits power to the transfer case 3 through the drive shaft. The transfer case 3 outputs power in two ways: one way drives the rotating cutter roller 42 of the rotary furrowing and ridging unit 4 to rotate, completing the cutting, lifting, and side throwing of sticky and wet soil, and initially forming the furrow shape 44; the other way drives the hydraulic pump group 821 of the integrated electro-hydraulic control unit 8 to work, providing power to various hydraulic components. The lidar 51 of the terrain perception unit 5 scans the furrow shape, the industrial computer processes the data and outputs control quantities, and the integrated electro-hydraulic control unit 8 controls the active furrow finishing unit 6 to dynamically refine the furrows to the standard size; finally, the seed and fertilizer application unit 7 simultaneously completes precise deep fertilization and precision sowing, with all units working in coordination.

[0030] Users can switch operating modes with one click through the HMI interface: In the new mode, the equipment completes the entire process of ditching, ridging, shaping, fertilizing, and sowing; in the repair mode, the terrain sensing unit 5 detects damaged furrows, and the active furrow finishing unit 6 dynamically repairs them before fertilizing and sowing; in the no-till mode, fertilization and sowing are carried out directly on standard furrows, adapting to the needs of different farmland conditions.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A modular ridge-planting fertilization and seeding machine suitable for moist clay soil, characterized in that: The system includes a main frame, which, along the working direction from front to back, is equipped with a rotary furrowing and ridging unit, a terrain sensing unit, an active furrow finishing unit, a seed and fertilizer application unit, and an integrated electro-hydraulic control unit. A transfer case is fixed to the side of the main frame closest to the tractor. The input shaft of the transfer case is connected to the PTO output shaft of the tractor, and the transfer case outputs power in two paths. The rotary furrowing and ridging unit cuts, lifts, sides-throws, and initially shapes the sticky, wet soil. The terrain sensing unit detects the furrow terrain and outputs repair control values. The active furrow finishing unit dynamically refines the furrows according to the control values. The seed and fertilizer application unit enables precise wheat sowing and deep fertilization. The integrated electro-hydraulic control unit enables coordinated control of all units.

2. The modular ridge-planting fertilizer-seeding machine suitable for moist clay soil according to claim 1, characterized in that: The transfer case is fixedly connected to the mounting plate at the front of the main frame, and the mounting plate is fixedly connected to the main frame; the PTO output shaft is rigidly connected to the input shaft of the transfer case through a cross-shaft universal joint drive shaft; one output shaft of the transfer case is connected to the power transmission shaft of the rotary ditching and ridging unit, and the other output shaft is coaxially connected to the input shaft of the integrated electro-hydraulic control unit to supply power to the hydraulic components of the whole machine.

3. A modular ridge-planting fertilizer-seeding machine suitable for moist clay soil according to claim 1, characterized in that: The rotary ditching and ridging unit is hinged to the front of the main frame via a three-point suspension frame. The three-point suspension frame is equipped with an independent hydraulic cylinder to realize lifting adjustment and switching between transport states. The rotary ditching and ridging unit includes a rotary cutter roller, which is a through-shaft design. The surface of the rotary cutter roller is provided with cutters. The cutters include several sets of evenly arranged spiral ditching components. The spiral ditching components include cutter discs arranged symmetrically on the left and right sides, and curved cutters arranged in double spirals are provided between the cutter discs. The rotary ditching and ridging unit also includes a preliminary forming structure, which is located behind the rotary cutter roller and is adapted to the spiral ditching assembly. The preliminary forming structure consists of a curved soil dividing plate and a preliminary shaping grid on the ridge top. The curved soil dividing plate is installed in an inverted V-shape and the opening width is adjustable. The preliminary shaping grid on the ridge top is composed of an arc-shaped fence.

4. A modular ridge-planting fertilizer-seeding machine suitable for moist clay soil according to claim 1, characterized in that: The terrain sensing unit includes a lidar, which is fixed to the crossbeam of the main frame via a bracket; the terrain sensing unit has a built-in industrial computer, which communicates with an integrated electro-hydraulic control unit via cables.

5. A modular ridge-planting fertilizer-seeding machine suitable for moist clay soil according to claim 1, characterized in that: The active furrow finishing unit is fixedly connected to the middle of the main frame by bolts. The active furrow finishing unit includes several sets of evenly arranged furrow finishing components. The furrow finishing components are adapted to the preliminary forming structure. Each set of furrow finishing components includes an electro-hydraulic servo cylinder, a hydraulic motor, an active contour scraper, a double-helix soil collector-splitter, and a lateral soil throwing and compaction component. The active contour scraper is a curved steel plate, and the compaction assembly is a pair of V-shaped compaction wheels. The active contour scraper and the compaction assembly are driven by the electro-hydraulic servo cylinder. The double-helix soil collector-distributor consists of a pair of left-handed and right-handed short helices and is driven by the hydraulic motor. The hydraulic motor and electro-hydraulic servo cylinder of the active furrow finishing unit are connected to the integrated electro-hydraulic control unit through an oil circuit.

6. A modular ridge-planting fertilizer-seeding machine suitable for moist clay soil according to claim 1, characterized in that: The seed and fertilizer application unit is fixedly connected to the rear of the main frame via a rigid crossbeam. The seed and fertilizer application units are evenly arranged side by side on the rigid crossbeam. Each seed and fertilizer application unit includes a fertilization unit and a sowing unit. The fertilization unit uses a fertilizer shovel and a fertilizer applicator. The fertilizer pipe outlet of the fertilizer applicator is located behind the tip of the fertilizer shovel. The sowing unit is located to the side and rear of the fertilizer shovel and uses a narrow double-disc furrow opener and a pneumatic centralized sowing system. The pneumatic centralized sowing system includes a blower and a sowing solenoid valve. The blower is connected to the transfer case via a drive shaft to obtain power. The sowing unit solenoid valve is connected to an integrated electro-hydraulic control unit via a cable. The sowing unit controls the sowing depth via a depth-limiting wheel.

7. A modular ridge-planting fertilizer-seeding machine suitable for moist clay soil according to claim 1, characterized in that: The integrated electro-hydraulic control unit includes a controller, a hydraulic system, and an electrical control system. The controller is integrated into a control box on the side of the main frame. The hydraulic system includes a hydraulic pump group and an oil tank, which are fixedly connected to the same side of the main frame. The hydraulic pump group provides an independent control circuit for the electro-hydraulic servo cylinder of the active furrow finishing unit and the independent hydraulic cylinder of the rotary furrowing and ridging unit. The hydraulic system is equipped with an air-cooled hydraulic oil radiator. The electrical control system is integrated into the control box. The PLC of the electrical control system is equipped with a digital / analog module connected to the rotary furrowing and ridging unit. The HMI of the electrical control system is equipped with a furrowing unit monitoring page for setting furrowing depth and furrow specification parameters.

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