Variable volume vertical tank type seed feeding device for air-assisted seed metering device

Abstract

This invention relates to a dual-purpose (oilseed and wheat) pneumatic conveying seed collection device with variable volume vertical trough type seed supply, comprising a seed box and a seed supply shell. The seed supply shell has a seed inlet communicating with the seed box and a seed outlet for sowing. A variable volume adjustment mechanism, located inside the seed supply shell, includes a vertical grooved wheel and a variable volume adjuster. The vertical grooved wheel is fitted inside the variable volume adjuster. The vertical grooved wheel is provided with multiple blades, and the sowing amount is adjusted by adjusting the extension of the blades beyond the variable volume adjuster. A drive shaft is rotatably connected to the frame at one end and carries the variable volume adjustment mechanism at the other end. A drive mechanism drives the drive shaft to rotate. The drive shaft drives the variable volume adjustment mechanism to rotate circumferentially, moving the seeds inside the seed supply shell to the seed outlet for sowing. This invention provides a seed supply device that can be adjusted according to agronomic requirements, with a large adjustable range of sowing amount, easily achieving versatility for supplying different seeds, and is suitable for stable operation under high-speed, wide-area operations.

Description

Technical Field

[0001] This invention relates to the field of sowing in agricultural machinery, specifically to a variable-volume vertical trough seed supply device that can be used for both oilseed and wheat crops. Background Technology

[0002] Mechanized sowing is a key part of agricultural production. Sowing quality directly affects seedling emergence and growth. In the process of mechanized sowing, the seed metering device is the core component of the seeder. Traditional "one device per row" seed metering devices are bulky and complex in structure, while centralized seed metering devices are compact and efficient. The air-pumped centralized seed metering system adopts a quantitative seed supply and a distributor that evenly distributes the seeds into rows, which is more suitable for the trend of high-speed and wide-area operations in modern agriculture.

[0003] Rapeseed and wheat are important oilseed and grain crops in my country. The mechanized sowing processes for wheat and rapeseed are similar. Developing a dual-purpose seed metering device for both rapeseed and wheat can effectively improve the utilization rate of machinery and simultaneously reduce production costs. Existing pneumatic seed metering devices can achieve seeding for both rapeseed and wheat, but they still suffer from slow operating speed, low efficiency, and significant impact on uniformity and stability from field vibrations. Furthermore, they can lead to a high rate of missed sowing due to vibration amplitude during field operations.

[0004] Chinese patent “A rapeseed and rice dual-purpose hole-forming centralized seeding device”, publication number CN109168455A, publication date 2019-01-11, discloses a rapeseed and rice dual-purpose hole-forming centralized seeding device, including a seed box, a row-forming and hole-forming seed supply device and a conveying and row-forming distribution device. The row-forming and hole-forming seed supply device is connected to the seed box at the top and the conveying and row-forming distribution device is connected at the bottom.

[0005] Chinese Patent No. CN111492760A, published on August 7, 2020, discloses a quantitative seed supply device for a centralized air-pumped seed metering device, including a seed box, a seed supply device housing, and an equal-width polygonal slotted gear assembly. The equal-width polygonal slotted gear assembly includes a seed metering shaft, an equal-width polygonal slotted gear mounted on the seed metering shaft, two baffles mounted on the seed metering shaft and located on both sides of the equal-width polygonal slotted gear, a middle partition plate provided between each baffle plate and one end of the equal-width polygonal slotted gear, and a blank wheel provided between each middle partition plate and one end of the equal-width polygonal slotted gear. Chinese patent "A Double-Cavity Constant-Quantity Seed Supply Double-Groove Seed Metering Device", publication number CN113424688A, publication date 2021-09-24, discloses a double-chamber constant-quantity seed supply double-groove seed metering device. The seed metering device mainly consists of a seed box, a positioning and adjustment mechanism, a seed filling mechanism, a seed belt supply mechanism, an electrical control mechanism, and a seed metering mechanism. The seed box is divided into a seed filling chamber and a seed metering chamber. The seed belt in the seed belt supply assembly is pressed against the groove on the seed filling mechanism by the cooperation of the belt shaft and the spring. The outer surface of the upper grooved wheel rotates synchronously with the grooved wheel to form a seed protection zone. Seeds in the seed filling chamber are transported to the seed discharging chamber at a certain speed under the action of the upper grooved wheel and the seed belt. The positioning adjustment mechanism can adjust the angle at which the seeds initially enter the seed discharging chamber. The working state of the upper grooved wheel and the seed layer thickness in the seed discharging chamber can be controlled by the electronic control mechanism and the sensor position. When the seed layer exceeds the sensor installation height, the upper grooved wheel stops filling seeds; when it is lower, it starts filling seeds to stabilize the seed layer in the seed discharging chamber. The seeds are then discharged from the device by the drive of the lower grooved wheel. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a variable volume vertical trough seed supply device that can be used for both oilseed and wheat cultivation, 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 dual-purpose (oil and wheat) pneumatic conveying and distributing type variable-volume vertical groove seed supply device includes a seed box, a seed supply shell, a variable-volume adjustment mechanism, a transmission main shaft, and a drive mechanism. The seed box is located directly above the seed supply shell and is used to deliver seeds into the seed supply shell. The variable-volume adjustment mechanism is located in the seed supply shell and mounted on the transmission main shaft. The variable-volume adjustment mechanism includes a vertical grooved wheel and a variable-volume adjuster. The vertical grooved wheel is sleeved inside the variable-volume adjuster. The outer side of the vertical grooved wheel is provided with blades. By adjusting the axial position of the variable-volume adjuster relative to the vertical grooved wheel, the height of the blades extending out of the variable-volume adjuster can be adjusted, thereby adjusting the seeding rate of the seed supply device.

[0009] The upper end of the seed supply shell is provided with a seed inlet communicating with the seed box and a seed outlet for sowing, and the driving mechanism is used to drive the transmission main shaft to rotate.

[0010] Furthermore, the vertical grooved wheel includes blades and a cylindrical sleeve. The blades are multiple and evenly distributed on the outer wall of the cylindrical sleeve. The variable volume adjuster is detachably mounted on the transmission main shaft and can move up and down along the transmission main shaft. The variable volume adjuster includes an outer cylinder. The upper surface of the outer cylinder is provided with a through groove that matches the cylindrical sleeve and blades. The vertical grooved wheel is fixedly mounted on the transmission main shaft, and the convex shaft and blades at the upper end of the cylindrical sleeve pass through the through groove. The outer wall of the outer cylinder is in contact with the inner wall of the seed supply shell.

[0011] Furthermore, the outer cylinder is threadedly connected to the transmission spindle and is circumferentially limited by radially arranged fasteners.

[0012] Furthermore, the fastener is a nut.

[0013] Furthermore, a first platform is provided around the outer edge of the upper surface of the outer cylinder, and multiple small seed-carrying grooves are evenly arranged on the first platform.

[0014] Furthermore, the top surface of the blade is an inclined plane, and the angle of inclination of the inclined plane is the same as the taper of the second platform. When the blade is fully retracted into the variable volume regulator, the blade is flush with the upper surface of the outer cylinder and forms a complete smooth curved surface.

[0015] Furthermore, a seed-blocking block is fixed inside the seed supply shell. The outer side of the seed-blocking block contacts the upper surface of the convex shaft and the top surface of the blade without any gap. When the vertical grooved wheel rotates, the seed-blocking block is used to block the seeds into the seed-carrying area between adjacent blades. When the blades are completely retracted into the variable volume regulator, the lower surface of the seed-blocking block contacts the upper surface of the outer cylinder.

[0016] Furthermore, there are two seed blocking blocks, namely a large seed blocking block and a small seed blocking block, and the two seed blocking blocks are symmetrically arranged on both sides of the vertical groove wheel. A seed outlet is provided on the seed supply shell between the two seed blocking blocks.

[0017] Furthermore, a wedge-shaped drainage plate is provided at the seed outlet.

[0018] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0019] This invention relates to a seed supply device that can be adjusted according to agronomic requirements. The seeding rate has a wide adjustable range, easily achieving compatibility with different seed types, and is suitable for stable operation under high-speed, wide-area conditions. Specifically:

[0020] 1. This invention adopts a vertical grooved wheel, which has low requirements for seed shape, strong versatility, and greatly improves the seed filling performance. It eliminates the seed stirring step, simplifies the transmission process, and improves the working performance of the seed metering device.

[0021] 2. The relative height between the vertical grooved wheel and the variable volume regulator described in this invention is adjustable, which enables the seeding rate of the seed supply device to be adjustable, meeting the seeding requirements of two different crops, rapeseed and wheat. The use of a vertical grooved wheel structure for seed filling is beneficial for the stable operation of the seed supply device under conditions of large vibration amplitude during field operations. Conversely, the vibration during field operations can increase the mobility of the seed population, which can play a role in stirring the seeds and easily achieve the sowing of wheat seeds with poor mobility, thus significantly improving work efficiency.

[0022] When sowing rapeseed or other small-diameter seeds, leaves are not suitable for seed carrying. Instead, the small seed-carrying grooves around the outer surface of the variable volume regulator are more suitable. The variable volume regulator can be adjusted so that the top surface of the vertical grooved wheel blades is flush with the upper surface of the outer cylinder, and the vertical grooved wheel blades are fully inserted into the variable volume regulator, that is, the upper surface of the grooved wheel blades coincides with the upper surface of the variable volume regulator. At this time, the upper surface of the outer cylinder is in contact with the arc-shaped lower wall of the large and small seed baffles—the first curved surface, thereby reducing the volume of the seed-carrying area, reducing the sowing amount, and reducing the degree of seed compression, which is suitable for sowing rapeseed seeds.

[0023] 3. The seed supply device of the present invention has a large range of seed supply adjustment, which can easily realize precise seed supply under high speed and wide range conditions, improve the utilization rate of the machine and reduce production costs.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is a top view of the present invention;

[0027] Figure 3 This is a three-dimensional partial cross-sectional view of the present invention;

[0028] Figure 4 This is a top view schematic diagram of some parts of the present invention;

[0029] Figure 5 yes Figure 4 Schematic diagram of three-dimensional partial section Figure 1 ;

[0030] Figure 6 yes Figure 4 Schematic diagram of three-dimensional partial section Figure 2 ;

[0031] Figure 7 This is a three-dimensional schematic diagram of the variable volume adjustment mechanism of the present invention;

[0032] Figure 8This is a three-dimensional exploded view of the variable volume adjustment mechanism of the present invention;

[0033] Figure 9 This is a cross-sectional view of the present invention. For the purpose of illustrative purposes, a partial rotational section has been made in the structural diagram.

[0034] Figure 10 This is a three-dimensional structural diagram of the seed-blocking block of the present invention.

[0035] The components represented by each number in the diagram are listed below:

[0036] 1. Seed box; 2. Seed supply shell; 3. Variable volume adjustment mechanism; 4. Transmission main shaft; 5. Drive mechanism; 6. Vertical grooved wheel; 7. Variable volume adjuster; 8. Support plate; 9. Lower support plate; 10. Nut; 11. Plum blossom type coupling; 12. Double flange support column; 13. Double bearing with seat; 14. Locking nut; 15. Wedge-shaped guide plate; 6.1 Blade; 6.2 Cylindrical sleeve; 6.3 Convex shaft; 7.1 Outer cylinder; 7.2 Through groove; 7.3 First platform; 7.4 Small seed carrying trough; 7.5 Upper surface of outer cylinder; 16.1 First curved surface; 16.2 Second curved surface; 16.3 Outer wall of seed retaining block; 16.4 Small seed retaining block; 16.5 Large seed retaining block Detailed Implementation

[0037] 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.

[0038] like Figure 1-9 As shown, the dual-purpose (oil and wheat) pneumatic conveying and distributing variable-volume vertical trough seed supply device of the present invention includes a seed box 1, a seed supply shell 2, a variable-volume adjustment mechanism 3, a transmission main shaft 4, and a drive mechanism 5; the variable-volume adjustment mechanism includes a vertical grooved wheel 6 and a variable-volume adjuster 7.

[0039] The seed supply shell 2 is provided with a seed inlet communicating with the seed box 1 and a seed outlet 2.1 for sowing; the variable volume adjustment mechanism is located inside the seed supply shell 2; the vertical grooved wheel 6 is sleeved inside the variable volume adjuster 7; the vertical grooved wheel 6 is provided with at least one blade 6.1, and the amount of sowing is adjusted by adjusting the extension of the blade 6.1 out of the variable volume adjuster 7; one end of the transmission main shaft 4 is rotatably connected to the frame, and the other end carries the variable volume adjustment mechanism; the drive mechanism 5 drives the transmission main shaft 4 to rotate; the transmission main shaft 4 drives the variable volume adjustment mechanism 3 to rotate circumferentially, moving the seeds in the seed supply shell 2 to the seed outlet 2.1 for sowing.

[0040] In a specific embodiment of the present invention, the dual-purpose oilseed and wheat air-pumped seed collection and distribution device with variable volume vertical trough design of the present invention further includes a support plate 8 and a lower support plate 9 distributed and fixed on the frame; the frame can be a tractor or other agricultural machinery platform such as a seeder.

[0041] In some optional embodiments of the present invention, the vertical grooved wheel 6 is supported on the transmission main shaft 4; the variable volume adjuster 7 is circumferentially limited to the transmission main shaft 4; the amount of seeding is adjusted by adjusting the axial position of the variable volume adjuster 7 on the transmission main shaft 4 to adjust the extension amount of the blade 6.1.

[0042] In some optional embodiments of the present invention, the vertical grooved wheel 6 includes a cylindrical sleeve 6.2 supported on the upper part of the transmission main shaft 4, and a plurality of blades 6.1 are evenly distributed on the outer wall of the cylindrical sleeve 6.2; the variable volume adjuster 7 includes an outer cylinder 7.1, and the outer cylinder 7.1 is provided with a through groove 7.2 that accommodates and is adapted to the cylindrical sleeve 6.2 and the blades 6.1; the outer wall of the outer cylinder 7.1 is adapted to the inner wall of the seed supply shell 2.

[0043] In some optional embodiments of the present invention, nine blades are provided, wherein the blades 6.1 are parallelograms and the outer edge of the blades forms an angle of 45° with the vertical direction.

[0044] The outer cylinder has a first platform 7.3 around its outer edge on the upper surface 7.5, and multiple small seed-carrying slots 7.4 are evenly distributed on the outer wall of the first platform 7.3. Thus, by adjusting the height of the blade 6.1 extending out of the through slot 7.2 to 0 mm, the small seed-carrying slots 7.4 can be used to sow rapeseed seeds.

[0045] Preferably, the depth of the above-mentioned small seed-carrying trough is 8mm.

[0046] In some optional embodiments of the present invention, the outer cylinder 7.1 is threadedly connected to the transmission spindle 4, and a nut 10 is fixed at the bottom of the outer cylinder 7.1; the transmission spindle 4 is provided with an external thread in the middle that is adapted to the nut 10.

[0047] Preferably, the nut 10 is a star nut.

[0048] The nut 10 has an internal thread that mates with the external thread on the transmission spindle 4. A locking nut 14 is located below the nut 10 and contacts its end face. The locking nut 14 and nut 10 are locked together via their contacting end faces. To increase reliability, four locating screws are evenly distributed axially on the end face of the locking nut 14. When the four locating screws are tightened, the position of the nut 10 on the spindle 4 is restricted. These conditions collectively restrict the axial movement of the variable volume adjuster 7 on the transmission spindle 4. That is, the axial position of the variable volume adjuster 7 relative to the vertical grooved wheel 6 can be determined by manually turning the wrench at the lower end of the variable volume adjuster, through the turning position of the external thread on the transmission spindle 4 and the internal thread on the inner side of the wrench nut. After determining the position according to the sowing amount, tighten the locking nut 14 to lock it with the lower end plane of the plum blossom nut, and at the same time tighten the positioning screw on the axial direction of the locking nut, so that the overall position of the variable volume adjuster 7 and the nut 10 does not move in the circumferential direction relative to the transmission main shaft 4, thus achieving circumferential limiting.

[0049] In some optional embodiments of the present invention, the drive mechanism 5 adopts a stepper motor, and the output end of the stepper motor is connected to the transmission main shaft 4 through a plum blossom coupling 11. The plum blossom coupling 11 is located inside the double flange support column 12. One end of the double flange support column 12 is fixed on the lower support plate (8) 9, and the other end of the double flange support column 12 carries a seated double bearing 13; one end of the transmission main shaft 4 is carried on the seated double bearing 13, and the transmission main shaft 4 is rotatably connected to the seated double bearing 13, thus realizing the rotatable connection between the transmission main shaft 4 and the frame.

[0050] Preferably, the variable volume regulator 7 and the plum blossom nut 10 are manufactured as a single integrated unit.

[0051] In some alternative embodiments of the invention, the taper of the first platform 7.3 is greater than the taper of the upper surface 7.5 of the outer cylinder.

[0052] In some optional embodiments of the present invention, the top surface of the blade 6.1 is an inclined surface, and the inclination angle of the inclined surface is the same as the taper of the upper surface 7.5 of the outer cylinder.

[0053] The guidance provided by the upper end of the convex shaft 6.3 and the upper surface 7.5 of the outer cylinder facilitates the smooth descent of the seeds.

[0054] In some optional embodiments of the present invention, in order to better discharge the seed flow downwards, a wedge-shaped guide plate 15 is provided at the seed outlet 2.1 of the seed supply shell 2 to guide the movement direction of the seed flow at the seed outlet.

[0055] In some optional embodiments of the present invention, the inner wall of the seed supply shell 2 is provided with at least one seed blocking block 16. The seed blocking block 16 is fan-shaped columnar, and the outer wall 16.3 of the seed blocking block is attached to the inner wall of the seed supply shell 2. The inner wall of the seed blocking block 16 is provided with a first curved surface 16.1 adapted to the upper surface 7.5 of the outer cylinder and a second curved surface 16.2 adapted to the upper end of the convex shaft 6.3.

[0056] In some optional embodiments of the present invention, the present invention is provided with a large seed blocking block 16.5 and a small seed blocking block 16.4; they are placed opposite each other, and their tops are flush with the upper end of the seed supply shell 2. After installation, the large and small seed blocking blocks do not move relative to the seed supply shell 2, and are used to block the seed flow in the seed filling area. The seed blocking angle is 150°. The large seed blocking block 16.5 is also used for seed cleaning. The vertical grooved wheel 6, the variable volume adjuster 7, and the locking nut 14 are sequentially installed on the transmission main shaft 4.

[0057] The through groove 7.2 cooperates with the blade 6.1, so that the vertical groove wheel 6 is fully fitted onto the variable volume regulator 7, thereby allowing the inner wall of the seed supply shell, the large seed blocking block, the vertical groove wheel blade, and the variable volume regulator to jointly form a seed carrying area. That is, the blade 6.1 and the cylindrical sleeve 6.2 can be inserted into the variable volume regulator 7, and the variable volume regulator 7 can slide up and down relative to the vertical groove wheel on the outer wall of the vertical groove wheel 6. The small seed carrying groove 7.4 is set on the first platform 7.4 for sowing rapeseed seeds.

[0058] The seeding amount can be adjusted by adjusting the axial position of the variable volume regulator 7 relative to the vertical grooved wheel 6. If the extension of the blade 6.1 relative to the variable volume regulator 7 is large, the seed-carrying area is large, and the amount of seeds sown each time is more. Conversely, if the extension of the blade 6.1 relative to the variable volume regulator 7 is small, the amount of seeds sown each time is less. The extension height of the vertical grooved wheel blade 6.1 relative to the variable volume regulator 7 ranges from 0 to 26 mm.

[0059] When sowing rapeseed or other small-diameter seeds, leaves are not suitable for seed carrying. Instead, the small seed-carrying groove 7.4 on the outer surface of the variable volume regulator is more appropriate. To use the small seed-carrying groove 7.4 on the outer surface of the variable volume regulator, adjust the variable volume regulator so that the top surface of the vertical grooved wheel blade is flush with the upper surface 7.5 of the outer cylinder. The vertical grooved wheel blade is fully inserted into the variable volume regulator, that is, the upper surface of the grooved wheel blade coincides with the upper surface of the variable volume regulator. At this time, the upper surface 7.5 of the outer cylinder is in contact with the arc-shaped lower wall of the large and small seed baffles—the first curved surface. This reduces the volume of the seed-carrying area, the amount of seeds sown, and the degree of seed compression, making it suitable for sowing rapeseed seeds.

[0060] The working principle of this invention is as follows:

[0061] 1. Based on the characteristics of the seed material and the seeding rate required by agronomy, determine the exposed height of the vertical grooved wheel blades. Tighten the plum nut at the lower end of the variable volume regulator to adjust the height of the vertical grooved wheel blades. After determining the height, tighten the locking nut to lock the contact end face of the plum nut and the locking nut, and tighten the positioning screw. At the same time, determine the appropriate speed of the transmission main shaft. When the dual-purpose oilseed and wheat pneumatic conveying and discharging type variable volume vertical groove seed supply device is working, the drive shaft rotates under the drive of an external stepper motor. In the seed filling zone, seeds are continuously filled from the seed box into the seed filling zone, which is composed of the seed supply shell, the vertical groove wheel, the variable volume regulator, and the large and small seed baffles, under the combined action of gravity, flow inertia, and population pressure, thus completing the seed filling process. The drive shaft continues to rotate, and the seeds enter the seed carrying zone under the seed cleaning action of the large seed baffle. When the seeds reach the seed outlet, they detach from the upper surface of the variable volume regulator under the action of their own gravity and centrifugal force, and are discharged downward from the seed outlet under the guidance of the wedge-shaped guide plate, thus completing the seed discharging process.

[0062] 2. If the extension height of the vertical groove wheel blade is adjusted to 0mm, and small-diameter rapeseed seeds are sown using the small seed-carrying groove on the outer surface of the variable volume regulator, the seed filling, carrying, and sowing process is basically the same as that of sowing wheat seeds, except for the volume and shape of the seed-carrying area.

[0063] 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 variable-volume vertical trough seed supply device for both oilseed and wheat crops, characterized in that, The device includes a seed box (1), a seed supply shell (2), a variable volume adjustment mechanism (3), a transmission main shaft (4), and a drive mechanism (5). The seed box (1) is located directly above the seed supply shell (2) and is used to deliver seeds into the seed supply shell (2). The variable volume adjustment mechanism (3) is located on the seed supply shell (2) and mounted on the transmission main shaft (4). The variable volume adjustment mechanism (3) includes a vertical grooved wheel (6) and a variable volume adjuster (7). The vertical grooved wheel (6) is fitted inside the variable volume adjuster (7). The vertical grooved wheel (6) has blades (6.1) on its outer side. By adjusting the axial position of the variable volume adjuster (7) relative to the vertical grooved wheel (6), the height of the upper end of the blades (6.1) extending out of the variable volume adjuster (7) can be adjusted to regulate the seeding amount of the seed supply device. The seed supply shell (2) has a seed inlet communicating with the seed box (1) and a seed outlet for sowing at its upper end. The driving mechanism (5) is used to drive the transmission main shaft (4) to rotate. The vertical grooved wheel (6) includes blades (6.1) and cylindrical sleeves (6.2). Multiple blades (6.1) are evenly distributed on the outer wall of the cylindrical sleeve (6.2). The variable volume regulator (7) is detachably mounted on the transmission main shaft (4) and can move up and down along the transmission main shaft (4). The variable volume regulator (7) includes an outer cylinder (7.1). The upper surface (7.5) of the outer cylinder is provided with a through groove (7.2) that is adapted to the cylindrical sleeve (6.2) and blades (6.1). The vertical grooved wheel (6) is fixedly mounted on the transmission main shaft (4), and the convex shaft (6.3) at the upper end of the cylindrical sleeve (6.2) and the blades (6.1) pass through the through groove (7.2). The outer wall of the outer cylinder (7.1) is in contact with the inner wall of the seed supply shell (2). The outer edge of the upper surface (7.5) of the outer cylinder is provided with a first platform (7.3), and a plurality of small seed-carrying grooves (7.4) are evenly provided on the first platform (7.3). The seed supply shell (2) is fixed with a seed blocking block. The outer side of the seed blocking block contacts the upper surface of the convex shaft (6.3) and the top surface of the blade (6.1) without gap. When the vertical grooved wheel (6) rotates, the seed blocking block is used to block the seeds into the seed carrying area between adjacent blades (6.1). When the blade (6.1) is completely retracted into the variable volume regulator (7), the lower surface of the seed blocking block contacts the upper surface (7.5) of the outer cylinder.

2. The dual-purpose (oil and wheat) pneumatic conveying and manifolding variable-volume vertical trough seed supply device according to claim 1, characterized in that, The outer cylinder (7.1) is threadedly connected to the transmission spindle (4) and is circumferentially limited by radially arranged fasteners.

3. The dual-purpose (oil and wheat) pneumatic conveying and manifolding variable-volume vertical trough seed supply device according to claim 2, characterized in that, The fastener is a nut.

4. The dual-purpose (oil and wheat) pneumatic conveying and manifolding variable-volume vertical trough seed supply device according to claim 1, characterized in that, The top surface of the blade (6.1) is an inclined surface, and the inclination angle of the inclined surface is the same as the taper of the first platform. When the blade (6.1) is fully retracted into the variable volume regulator (7), the blade (6.1) is flush with the upper surface (7.5) of the outer cylinder and forms a complete smooth curved surface.

5. The dual-purpose (oil and wheat) pneumatic conveying and manifolding variable-volume vertical trough seed supply device according to claim 1, characterized in that, There are two seed blocking blocks, namely a large seed blocking block (16.5) and a small seed blocking block (16.4), and the two seed blocking blocks are symmetrically arranged on both sides of the vertical groove wheel (6). The seed supply shell (2) between the two seed blocking blocks is provided with a seed outlet.

6. The dual-purpose (oil and wheat) pneumatic conveying and manifolding variable-volume vertical trough seed supply device according to claim 1, characterized in that, A wedge-shaped drainage plate is provided at the seed outlet.

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