A high-speed precision direct seeding machine for rapeseed in strip micro-ridges

Abstract

This invention relates to a high-speed precision direct seeding machine for rapeseed in strip micro-ridges, comprising a three-point suspension, a main frame, a centrally split shallow tiller, a left-turning shallow tiller, a right-turning shallow tiller, and a furrowing plow mounted below the main frame, a fertilizer applicator and a seed applicator mounted above the main frame, a four-bar linkage mounted behind the main frame, and a soil-breaking and leveling device and a ridging and furrowing device mounted behind the four-bar linkage. Driven by a tractor or other traveling mechanism, this invention performs furrowing, soil breaking, and ridging. A single operation can achieve combined strip micro-ridge seedbed preparation, fertilization, and sowing, meeting the requirements for high-speed direct seeding operations at speeds of 10 km / h or higher. The shallow tillage and furrowing plow performs initial furrowing, the soil-breaking and leveling device performs soil breaking and leveling, and the ridging and furrowing device performs micro-ridgeing. The combined working structure is reasonable and provides good ridging effect.

Description

Technical Field

[0001] This invention relates to the field of agricultural ditching, ridging, sowing, and fertilization, specifically to a high-speed, strip-shaped micro-ridge precision direct seeding machine for rapeseed. Background Technology

[0002] Rapeseed is an important oilseed crop in my country, accounting for more than 40% of the total annual output of edible vegetable oil. Therefore, the technology for stabilizing and increasing rapeseed production is one of the effective ways to ensure my country's food and oil security.

[0003] Rapeseed is widely cultivated in China due to its strong resistance to adverse conditions and wide adaptability, making it a superior crop for effectively utilizing fallow winter fields. In recent years, support for developing and utilizing fallow winter fields for rapeseed cultivation has been increasing. From 2016 to 2022, the national rapeseed planting area increased from 6.623 million hectares to 7.253 million hectares, and the proportion of rapeseed planting area in the national total crop planting area has been increasing year by year. However, due to the short sowing period of rapeseed, the crop rotation contradiction is relatively tight in the Yangtze River basin's two-season crop planting pattern, often resulting in untimely sowing due to late harvesting across regions. Given the short sowing period and increasing planting area of ​​rapeseed, the operating speed of rapeseed direct seeding machines needs to be further improved while meeting the multi-step requirements of rapeseed sowing operations. Therefore, research on high-speed precision combined sowing of rapeseed is of significant practical importance.

[0004] In my country, the growing regions for winter rapeseed are increasingly affected by extreme weather events, such as prolonged droughts or heavy rainfall, due to global warming and uneven spatial and temporal distribution of rainfall. Rapeseed is sown at shallow depths (0-20mm) and its roots are sensitive to waterlogging. Prolonged drought in the early growth stages can lead to insufficient moisture for seed germination and failure to emerge; conversely, prolonged rainfall can cause waterlogging, increasing the risk of yield reduction. To address this, a strip-shaped micro-ridge planting agronomic scheme is proposed. This involves constructing strip-shaped micro-ridges with a height of 150mm, a width of 300mm, and a spacing of 400mm, and sowing rapeseed seeds in the sowing strips at the top of the ridges and in the furrows. In the event of prolonged drought, the furrows retain moisture effectively, ensuring seed germination; in the event of prolonged rainfall, the furrows drain water, preventing waterlogging at the top of the ridges. This improves the emergence and seedling survival rate of rapeseed under extreme conditions, achieving stable and increased yields regardless of drought or flood.

[0005] Currently, compared with flat planting, micro-ridge planting in Hubei Province has significantly improved seedling emergence, seedling survival rate, and yield, and has been promoted and applied to a certain extent. However, production is still mainly based on manual labor, which is labor-intensive and inefficient. The lack of related agricultural machinery has become an important factor restricting the further promotion of micro-ridge planting. Therefore, it is of great significance to develop a high-speed, high-quality, and high-efficiency precision combined seeding equipment for rapeseed in strip micro-ridge planting, so as to meet the production needs under the background of expanded planting and rapeseed planting under the new micro-ridge agronomic form, and ensure stable and increased rapeseed production and mechanized development. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a high-speed strip micro-ridge precision direct seeding machine for rapeseed, in response to the above problems and requirements.

[0007] To solve the above technical problems, the present invention adopts the following technical solution:

[0008] A high-speed, strip-shaped, micro-ridged, precision direct seeding machine for rapeseed includes a main frame, a shallow tillage and ditching plow mounted below the main frame, a fertilizer dispensing device and a seed dispensing device mounted above the main frame, a four-bar linkage mounted behind the main frame, and a soil-breaking and leveling device and a ridging and ditching device mounted behind the four-bar linkage. The main frame is mounted on an external traveling mechanism via a suspension system and moves with the external traveling mechanism. The shallow tillage and ditching plow is used to break the soil, initially create furrows and ridges when following the main frame. The fertilizer dispensing device is used to evenly distribute fertilizer onto the bed surface. The four-bar linkage is used to adjust the working height of the soil-breaking and leveling device and the ridging and ditching device. The soil-breaking and leveling device is used to break the soil when following the main frame. The ridging and ditching device is used to rid and ditch when following the main frame. The ridging and ditching device is also equipped with multiple seed dispensing pipes, which are connected to the seed dispensing device and used for seed dispensing.

[0009] Furthermore, the shallow tillage and furrowing plow includes a furrowing plow, a left-turning shallow tillage plow, a right-turning shallow tillage plow, and three center-parting shallow tillage plows. The three center-parting shallow tillage plows are arranged in a three-point configuration, with one in front and two behind. The left-turning and right-turning shallow tillage plows are located on the left and right sides of the center-parting shallow tillage plows, respectively, and the furrowing plow is located outside the left-turning and right-turning shallow tillage plows. The left-turning, right-turning, and three center-parting shallow tillage plows are used for turning over the soil and initially creating furrows, while the furrowing plow is used to create furrows.

[0010] Furthermore, the four-bar linkage is a parallelogram structure consisting of a frame rod fixed to the main frame, a first connecting rod connected to the frame rod, a second connecting rod, and a connecting rod connecting the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod have the same connection length, and the connecting rod remains parallel to the frame rod during adjustment, and its height position can be changed.

[0011] Furthermore, the soil pulverizing and equalizing device includes a mounting plate, soil pulverizing and equalizing teeth, and a horizontally arranged soil pulverizing and equalizing roller. The mounting plate is vertically sleeved on the outside of the soil pulverizing and equalizing roller and there are multiple mounting plates. The soil pulverizing and equalizing teeth are in multiple sets and fixed on the mounting plate. The multiple sets of soil pulverizing and equalizing teeth are evenly distributed around the circumference of the mounting plate. Each set of soil pulverizing and equalizing teeth is a continuous strip composed of multiple segments of soil pulverizing and equalizing teeth. The shape of the soil pulverizing and equalizing device can be adjusted by adjusting the installation position of the mounting plate on the soil pulverizing and equalizing roller.

[0012] Furthermore, the ridging and ditching device includes a central ridging and ditching component, a left ridging and ditching component, and a right ridging and ditching component. The central ridging and ditching component, the left ridging and ditching component, and the right ridging and ditching component are all installed on the second crossbeam by mounting plates. The left ridging and ditching component and the right ridging and ditching component are located on the left and right sides of the central ridging and ditching component. There are multiple central ridging and ditching components, which are located directly behind the left shallow tillage plow, the right shallow tillage plow, and the central shallow tillage plow, respectively. A contouring rubber rod is set between the mounting plate and the second crossbeam to achieve contouring operation.

[0013] Furthermore, the bottom of the central ridging and ditching component, the left ridging and ditching component, the right ridging and ditching component, and the outlet end of the seed furrow opener and seed metering pipe are all fixed to realize sowing on the ridge top and in the furrow.

[0014] Furthermore, the cutting edge curves of the central ridging and ditching component, the left ridging and ditching component, the right ridging and ditching component, and the seed furrow opener all adopt a sliding blade type cutting edge curve.

[0015] Furthermore, the fertilizer discharge device is mounted on the main frame, and the fertilizer discharger in the fertilizer discharge device is connected to the fertilizer discharge pipe. The inner side of the fertilizer discharge pipe is provided with multiple diversion plates. Each diversion plate includes two diversion plates arranged in a "V" shape, with one end of the diversion plate fixed to the inner side of the fertilizer discharge pipe and the other end suspended.

[0016] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0017] 1. This invention performs ditching, soil breaking and ridging under the drive of a tractor or other traveling mechanism. It is suitable for high-speed strip micro-ridge precision combined direct seeding of rapeseed at speeds of 10 km / h or above, and can meet the requirements of high-speed operation.

[0018] 2. This invention can achieve combined operations of strip micro-ridge seedbed preparation, fertilization, and sowing in a single operation;

[0019] 3. The shallow tillage and furrowing plow is used to break the soil, initially open furrows and ridges, the soil breaking and equalizing device is used to break and equalize the soil, and the ridging and furrowing device is used to create micro-ridges. The combined working structure is reasonable and the ridging effect is good.

[0020] 4. The strip-shaped micro-ridge seedbed formed after the operation of this invention meets the current agronomic requirements for rapeseed micro-ridge planting and effectively reduces the risk of yield reduction caused by extreme weather.

[0021] 5. The installation height of the soil breaking and equalizing device and the ridging and furrowing device can be adjusted according to the required ridging height, and the shape of the soil breaking and equalizing teeth can be adjusted according to the soil breaking requirements, making it widely applicable.

[0022] 6. The installation angle of the soil crushing and uniformizing teeth can be changed to ensure the soil crushing and uniformity rate under different working conditions;

[0023] 7. The ridging and ditching components are installed with contour rubber rods, enabling contour-following operations and increasing the machine's maneuverability;

[0024] 8. The fertilizer discharge pipe is equipped with a diversion plate. During the discharge process, the fertilizer can be evenly distributed after colliding with the diversion plate multiple times.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of soil flow direction during the operation of this invention;

[0028] Figure 3 This is a schematic diagram of a four-bar linkage.

[0029] Figure 4 This is a schematic diagram of the adjustment of a four-bar linkage;

[0030] Figure 5 This is a schematic diagram of a soil-breaking and leveling device.

[0031] Figure 6 Schematic diagram of a ridging and furrowing device;

[0032] Figure 7 A schematic diagram of the structure of the central ridging and ditching component;

[0033] Figure 8 This is a schematic diagram of the fertilizer discharge pipe structure.

[0034] The components represented by the component numbers in the diagram are as follows:

[0035] 1. Three-point suspension; 2. Main frame; 3. Center-split shallow tillage plow; 4. Left-turning shallow tillage plow; 5. Right-turning shallow tillage plow; 6. Fertilizer plow; 7. Fertilizer applicator; 7.1 Fertilizer box; 7.2 Fertilizer applicator; 7.3 Fertilizer applicator pipe; 7.4 Shaft-mounted motor; 7.5 Inspection window; 8. Four-bar linkage; 8.1 Frame rod; 8.2 First connecting rod; 8.3 Second connecting rod; 8.4 Connecting rod; 9.1 First crossbeam; 9.2 Second crossbeam; 9.3 Connecting clip; 9.4 Side plate; 9.5 Soil breaking and equalizing device; 9.5.1 Soil breaking and equalizing roller. 9.5.2 Connecting plate; 9.5.3 Positioning pin; 9.5.4 Fixing pin; 9.5.5 Mounting plate; 9.5.6 Soil-breaking and equalizing teeth; 9.5.7 Fixing clip; 9.6 Middle ridging and furrowing component; 9.6.1 Ridging forming plate; 9.6.2 Mounting pressure plate; 9.6.3 Contouring rubber rod; 9.6.4 Furrow opener; 9.6.5 Seed tube clamp; 9.6.6 Rubber sheet; 9.6.7 Rubber sheet pressure plate; 9.7 Left side ridging and furrowing component; 9.8 Right side ridging and furrowing component; 10. Seed metering device. Detailed Implementation

[0036] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0037] like Figure 1 , 2 As shown, a high-speed strip micro-ridge precision direct seeding machine for rapeseed includes a three-point suspension 1, a main frame 2, a central shallow tillage plow 3, a left-turning shallow tillage plow 4, a right-turning shallow tillage plow 5 and a furrowing plow 6 installed below the main frame 2, a fertilizer applicator 7 installed above the main frame 2, a seed applicator 10, a four-bar linkage 8 installed behind the main frame 2, a soil breaking and equalizing device 9.5 installed behind the four-bar linkage 8, and a ridge and furrowing device.

[0038] like Figure 2As shown, three shallow tillers 3 (center-split), 4 (left-turning), 5 (right-turning), and 6 (furrowing plow) are installed below the main frame 2. They are symmetrically installed, and the tip of each plow corresponds to the furrowing position of the rear central ridging and furrowing component 9.7. Under the action of the center-split shallow tiller 3, the topsoil first rises along the plow surface to break up the soil. After reaching a certain height, the topsoil begins to fall along both sides of the plow, further breaking up the soil and initially creating the two central furrows. Under the action of the left-turning shallow tiller 4, the topsoil first rises along the plow surface to break up the soil. After reaching a certain height, the topsoil begins to fall to the left along the plow surface, achieving left-side soil movement and further breaking up the soil. And initially open furrows; under the action of the right shallow tillage plow 5, the topsoil will first rise along the plow surface of the right shallow tillage plow 5 to break the soil. After reaching a certain height, the topsoil will start to fall to the right along the plow surface, realizing the right-side movement of the soil, further breaking the soil, and initially opening furrows; the two furrowing plows 6 realize the soil to turn inward by turning and closing the clods during the machine's forward movement, opening furrows and forming preliminary ridges together with the soil moved by the left shallow tillage plow 4 and the right shallow tillage plow 5.

[0039] like Figure 3 , Figure 4 As shown, the main frame 2 is connected to the soil-breaking and leveling device and the ridging and ditching device through a four-bar linkage 8 fixed to the connecting clip 9.3. The four-bar linkage 8 consists of a frame rod 8.1 fixed to the main frame 2, a first connecting rod 8.2 connected to the frame rod 8.1, a second connecting rod 8.3 connected to the frame rod 8.1, and a connecting rod 8.4 connecting the first connecting rod 8.2 and the second connecting rod 8.3. Since the first connecting rod 8.2 and the second connecting rod 8.3 are of the same length, the connecting rod 8.4 remains parallel to the frame rod 8.1 during adjustment, thereby changing the working height of the soil-breaking and leveling device and the ridging and ditching device, and further adjusting the ridge height. The upper limit bolt 8.3.1 on the second connecting rod 8.3 effectively prevents the soil-breaking and leveling device and the ridging and ditching device from falling off during transportation. Several lower limit holes 8.3.3 can be fixed by inserting lower limit pins 8.3.2 to meet the adjustment of the working height of the soil-breaking and leveling device and the ridging and ditching device.

[0040] like Figure 5As shown, the soil breaking and leveling device 9.5 consists of a soil breaking and leveling roller shaft 9.5.1, five mounting plates 9.5.5 mounted on the soil breaking and leveling roller shaft 9.5.1, soil breaking and leveling teeth 9.5.6 mounted on the mounting plates 9.5.5, fixing clips 9.5.7 for fixing the positions of the soil breaking and leveling teeth 9.5.6 and the mounting plates 9.5.5, a connecting plate 9.5.2 connected to the soil breaking and leveling roller shaft 9.5.1 via a bearing seat, fixing pins 9.5.4 installed between the soil breaking and leveling device and the two side plates 9.4, and positioning pins 9.5.3. The position and angle of the mounting plate 9.5.5 on the soil crushing and leveling roller 9.5.1 are adjustable. In this embodiment, multiple sets of soil crushing and leveling teeth are evenly distributed on each corner of the circumference of the mounting plate. Each set of soil crushing and leveling teeth is a continuous strip composed of two sections of soil crushing and leveling teeth. By adjusting the installation position and rotation angle of the mounting plate on the soil crushing and leveling roller shaft, the shape and position of the left and right sections of soil crushing and leveling teeth can be adjusted respectively.

[0041] By changing the installation angle of the soil crushing and equalizing teeth, the soil crushing and equalizing rate under different working conditions can be guaranteed; the positioning pin can adjust the working height of the soil crushing and equalizing device by adjusting the relative position of the upper hole of the connecting plate 9.5.2 and the side plate 9.4.

[0042] like Figure 6 , Figure 7 As shown, the central ridging and ditching component 9.6, the left-side ridging and ditching component 9.7, and the right-side ridging and ditching component 9.8 are installed on the second crossbeam 9.2. Through coordinated operation, they complete the ridging and ditching work, forming five strip-shaped micro-ridges with a height of 150mm, a width of 300mm, and a spacing of 400mm. The central ridging and ditching component 9.6 consists of a ridging forming plate 9.6.1, a mounting pressure plate 9.6.2, a contoured rubber rod 9.6.3, a furrow opener 9.6.4 installed below the ridging forming plate 9.6.1, a seed tube clamp 9.6.5 installed behind the furrow opener 9.6.4, connecting rubber sheets 9.6.6 installed on both sides of the ridging forming plate, and a rubber sheet pressure plate 9.6.7 used to fix the connecting rubber sheets 9.6.6 to the ridging forming plate 9.6.1.

[0043] The furrow opener 9.6.4 and seed tube clamp 9.6.5 are evenly distributed on the ridge top and in the furrow. Seeds are sown into the ridge top and in the furrow via the seed metering device 10, achieving sowing on the ridge top and in the furrow, with a total of 4 rows sown at the bottom of the ridge and 5 rows sown on the top of the ridge. When extreme drought occurs, the furrow retains moisture to ensure seedling emergence; when continuous rainfall occurs, the ridge top effectively avoids waterlogging, ensuring the seedling emergence rate, thus achieving a stable harvest regardless of drought or flood.

[0044] The central ridging and ditching component 9.6, the left ridging and ditching component 9.7, and the right ridging and ditching component 9.8 can achieve contouring operation through the installation of pressure plate 9.6.2 and contouring rubber rod 9.6.3. When there is too much soil or soil blockage occurs, the contouring can increase the passability of the machine.

[0045] The cutting edge curves of the central ridging and ditching component 9.6, the left ridging and ditching component 9.7, the right ridging and ditching component 9.8, and the seed furrow opener 9.6.4 all adopt a sliding blade type cutting edge curve to prevent grass from getting tangled during operation.

[0046] like Figure 8 As shown, to achieve full-coverage fertilization by the high-speed strip micro-ridge precision direct seeding machine for rapeseed, the fertilizer is evenly distributed after multiple collisions with the diverter plate on the fertilizer discharge pipe 7.3. Based on the installation position of the fertilizer discharge device and the fertilizer drop height, the parameters of the fertilizer discharge pipe are calculated as L1 = 49.4 mm and L2 = 74 mm.

[0047] The specific working process of the rapeseed high-speed strip micro-ridge precision direct seeding machine of the present invention is as follows:

[0048] The high-speed strip micro-ridge precision direct seeding machine for rapeseed is connected to the rear suspension of a tractor via a three-point suspension. It operates in a passive mode, creating five ridges per operation, with five rows sown on the ridge tops and four rows in the furrows, for a total of nine rows. During operation, the machine, pulled by the tractor, uses a central shallow tiller, a left-hand shallow tiller, and a right-hand shallow tiller to lift and break up the topsoil, completing lateral soil migration and initially creating furrows. Simultaneously, a furrowing plow works on both sides of the machine to turn and break up clods, creating furrows and lateral soil movement. Fertilizer is applied evenly across the entire width of the machine via a fertilizer applicator. The soil breaking and equalizing device and the ridge-forming and furrowing device, adjusted by a four-bar linkage, passively compress the soil to a certain depth to form ridges. Simultaneously, a furrow opener creates a sowing strip on each ridge top and in each furrow, and seeds are sown into the sowing strip via a seed applicator.

[0049] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A high-speed strip micro-ridge precision combined direct-seeding machine for oilseed rape, characterized in that, The utility model provides a kind of shallow ploughing furrower, including main frame, shallow ploughing furrower installed in the lower of main frame, fertilizer device and seed device installed in the upper of main frame, four-bar mechanism installed in the rear of main frame and soil breaking and soil leveling device and ridge forming and furrowing device installed in the rear of four-bar mechanism, the main frame is installed on external running mechanism by suspension system and moves along with external running mechanism, shallow ploughing furrower is used to break soil, preliminary ridge and furrow and furrow when following main frame travels, fertilizer device is used to distribute fertilizer to compartment surface, four-bar mechanism is used to adjust the working height of soil breaking and soil leveling device and ridge forming and furrowing device, soil breaking and soil leveling device is used to break soil when following main frame travels, ridge forming and furrowing device is used to form ridge and furrow when following main frame travels, and ridge forming and furrowing device is further provided with a plurality of seed tubes, seed tube is connected with seed device and is used to seed distribution; The shallow ploughing furrower includes a furrowing plough, a left shallow ploughing plough, a right shallow ploughing plough, and three middle shallow ploughing ploughs. The three middle shallow ploughing ploughs are arranged in a three-point manner with one in front and two behind. The left shallow ploughing plough and the right shallow ploughing plough are respectively located on the left and right sides of the middle shallow ploughing ploughs, and the furrowing plough is located outside the left shallow ploughing plough and the right shallow ploughing plough. The left shallow ploughing plough, the right shallow ploughing plough, and the three middle shallow ploughing ploughs are used to break soil and preliminarily form ridges and furrows, and the furrowing plough is used to form furrows. The soil breaking and soil leveling device includes mounting plates, soil breaking and soil leveling teeth, and horizontally arranged soil breaking and soil leveling roller shafts. The mounting plates are vertically sleeved outside the soil breaking and soil leveling roller shafts and are multiple. The soil breaking and soil leveling teeth are multiple groups and are fixed on the mounting plates. The multiple groups of soil breaking and soil leveling teeth are uniformly distributed in the circumferential direction of the mounting plates. Each group of soil breaking and soil leveling teeth is a continuous strip composed of multiple sections of soil breaking and soil leveling teeth. The shape of the soil breaking and soil leveling device can be adjusted by adjusting the mounting position of the mounting plates on the soil breaking and soil leveling roller shafts. The ridge forming and furrowing device includes middle ridge forming and furrowing components, left side ridge forming and furrowing components, and right side ridge forming and furrowing components. The middle ridge forming and furrowing components, the left side ridge forming and furrowing components, and the right side ridge forming and furrowing components are all installed on the second cross beam through mounting pressure plates, and the left side ridge forming and furrowing components and the right side ridge forming and furrowing components are located on the left and right sides of the middle ridge forming and furrowing components. The middle ridge forming and furrowing components are multiple and are respectively located directly behind the left shallow ploughing plough, the right shallow ploughing plough, and the middle shallow ploughing ploughs. There are profiled rubber rods between the mounting pressure plates and the second cross beam to realize profiled operation. The bottom of the middle ridge forming and furrowing components, the left side ridge forming and furrowing components, and the right side ridge forming and furrowing components and the outlet ends of the seed furrow openers and the seed tubes between adjacent ridge forming and furrowing components are all fixed. This is used to realize ridge top and ridge furrow seeding.

2. The high-speed strip micro-ridge precision combined direct seeding machine for oilseed rape according to claim 1, characterized in that, The four-bar mechanism is a parallelogram structure composed of a frame rod fixed on the main frame, a first connecting frame rod, a second connecting frame rod connected to the frame rod, and a connecting rod connected to the first connecting frame rod and the second connecting frame rod. The first connecting frame rod and the second connecting frame rod are of the same length. The connecting rod always remains parallel to the frame rod during adjustment and the height position can be changed.

3. The high-speed strip micro-ridge precision combined direct-seeding machine for oilseed rape according to claim 1, characterized in that, The middle ridging and ditching component, the left side ridging and ditching component, the right side ridging and ditching component and the blade curve of the seed trench ditching device all adopt a sliding knife type blade curve.

4. The high-speed strip micro-ridge precision combined direct-seeding machine for oilseed rape according to claim 1, characterized in that, The fertilizer discharging device is arranged on the main frame, a fertilizer discharger in the fertilizer discharging device is connected with a fertilizer discharging pipe, a plurality of groups of flow distribution plates are arranged on the inner side of the fertilizer discharging pipe, each group of flow distribution plates comprises two flow distribution plates arranged in a "H" shape, one end of the flow distribution plates is fixed on the inner side of the fertilizer discharging pipe, and the other end is suspended.

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