A rapeseed combined harvesting header grain recovery device and recovery method

Abstract

The application discloses a rapeseed combined harvesting header grain recovery device and recovery method, a plurality of straw dividers are installed side by side at the front end of a header assembly, a fan is installed on the header assembly, the fan has a positive pressure airflow output end and a negative pressure airflow output end, the positive pressure airflow output end is connected with an airflow field mechanism for providing an airflow field at the front end of the header assembly through a first pipeline, the airflow field mechanism comprises an airflow main pipe for inputting the positive pressure airflow, a plurality of airflow branch pipes installed side by side on the airflow main pipe, a connecting base for connecting nozzles and the airflow branch pipes and a plurality of nozzles, the nozzles are installed obliquely towards the rear end of the header assembly, the airflow field mechanism is installed between the straw dividers and the cross cutter, when the fan is started, the airflow field opposite to the advancing direction of the header assembly is formed at the front end of the header assembly, and the splashed rapeseed grains are blown into the header assembly through the airflow field, so that the grain harvesting rate is improved.

Description

Technical Field

[0001] This invention relates to a rapeseed combine harvester header, and in particular to a rapeseed combine harvester header grain recovery device and recovery method. Background Technology

[0002] When rapeseed pods are mature, they are very prone to cracking. When harvesting using a traditional rapeseed combine harvester, the pods are even more prone to cracking due to the pulling of the reel, the pulling of the divider, and the reciprocating motion of the cutter. As a result, rapeseed grains will fly in all directions, causing serious losses during harvesting.

[0003] In addition, most rapeseed combine harvester headers are based on rice and wheat harvester headers with the addition of vertical cutting blades to cut the rapeseed that is intertwined with the unharvested area. However, while cutting the rapeseed stalks, the vertical cutting blades also cut the rapeseed pods, causing the rapeseed grains to be splashed and lost. Summary of the Invention

[0004] The technical problem to be solved by this invention is to address the serious grain loss during harvesting using traditional rapeseed combine harvesters. This invention provides a simple, field-adaptable rapeseed combine harvester grain recovery device and method.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A rapeseed combine harvester grain recovery device includes a header assembly, with multiple dividers and multiple cross-cutting blades installed side by side at the front end of the header assembly. A fan is installed on the header assembly, and the fan has a positive pressure airflow output end and a negative pressure airflow output end. The positive pressure airflow output end is connected via a first pipeline to an airflow field mechanism for providing an airflow field at the front end of the header assembly.

[0007] The airflow field mechanism includes an airflow main pipe for introducing positive pressure airflow, multiple airflow branch pipes installed side by side on the airflow main pipe, a connecting base for connecting nozzles and airflow branch pipes, and multiple nozzles. The nozzles are installed at an angle towards the rear end of the cutting platform assembly. When the fan is started, an airflow field is formed at the front end of the cutting platform assembly in the opposite direction to the forward direction of the cutting platform assembly.

[0008] The airflow mechanism is installed between the divider and the cross-cutting blade.

[0009] This invention reduces grain harvesting losses by installing an airflow mechanism between the divider and the cross-cutting blade, i.e., adding a pneumatic back-blowing loss reduction device at the cross-cutting blade. After the grains burst, the airflow generated transports the grains into the interior of the cutter assembly, preventing them from falling into the field.

[0010] Preferably, vertical cutting blades are installed on both sides of the cutting platform assembly, and vertical cutting blade inoculation grooves are installed below the vertical cutting blades. The negative pressure airflow output end of the blower is connected to the settling tank via a second pipeline, and the settling tank is then connected to the vertical cutting blade inoculation groove via a third pipeline, so as to simultaneously realize the recovery of splashed grains caused by the vertical cutting blades.

[0011] Preferably, the divider has a fish-mouth-shaped structure with a small front end and a large rear end, so that the divider of the present invention can not only perform the function of dividing the rice, but also protect the nozzle. In addition, the small front end and large rear end of the divider can more easily enter the rapeseed field. The small front end of the divider also reduces the contact between the stem and the divider, thereby reducing weed entanglement and making it easier for the stem to be cut by the cross-cutting knife.

[0012] In one specific embodiment, the divider includes an upper cover and a lower cover, the upper cover being longer than the lower cover, the lower cover including a flat plate portion parallel to the horizontal plane and a bent portion bent upward relative to the horizontal plane, the connecting base being mounted on the flat plate portion, and the nozzle passing through the upper cover and connected to the connecting base.

[0013] Preferably, the angle between the bent portion and the flat portion is 150-170°.

[0014] Preferably, the drive shaft of the blower is connected to the input shaft of the threshing reversing box via a pulley mechanism, so as to provide power to the blower through the input shaft of the threshing reversing box of the cutter assembly.

[0015] Preferably, the nozzle includes a straight section and an open section. One end of the straight section is connected to the connecting base, and the other end is connected to the open section. The open section has a flat, straight opening and is arranged parallel to the cross-cutting blade to provide an airflow field that is as wide and dense as possible.

[0016] Preferably, the opening section is inclined outward at 30-40° relative to the straight section, and the width of the straight opening is 2-4 mm.

[0017] Preferably, the lateral distance between the nozzle and the cross-cutting blade is 35-40cm, the longitudinal distance between the nozzle and the cross-cutting blade is 1-3cm, and the nozzle forms an angle of 12-18° with the direction perpendicular to the ground.

[0018] Based on the same inventive concept, the present invention also provides a method for grain recovery from a rapeseed combine harvester header, wherein a fan is installed on the header assembly, the fan having a positive pressure airflow output end and a negative pressure airflow output end, the positive pressure airflow output end being connected via a first pipeline to an airflow field mechanism for providing an airflow field at the front end of the header assembly;

[0019] The airflow field mechanism includes a main airflow pipe for introducing positive pressure airflow, multiple airflow branch pipes installed side by side on the main airflow pipe, a connecting base for connecting nozzles and airflow branch pipes, and multiple nozzles. The nozzles are installed at an angle towards the rear end of the header assembly. When the fan is started, an airflow field is formed at the front end of the header assembly in the opposite direction to the forward direction of the header assembly. The airflow field blows the grains at the front end of the header assembly into the header assembly.

[0020] Vertical cutting blades are installed on both sides of the cutting platform assembly, and vertical cutting blade inoculation grooves are installed below the vertical cutting blades. The negative pressure airflow output end of the blower is connected to the settling tank through a second pipeline, and the settling tank is then connected to the vertical cutting blade inoculation grooves through a third pipeline. The negative pressure of the blower is used to recover the grains that fall into the vertical cutting blade inoculation grooves to the settling tank, where they settle.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The rapeseed combine harvester grain recovery device of the present invention has a simple structure, good field adaptability, and can recover grains splashed during the harvesting process, thereby improving the grain harvesting rate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the rapeseed combine harvester grain recovery device of the present invention.

[0025] Figure 2 This is a schematic diagram illustrating the working principle of the positive pressure airflow grain recovery device for rapeseed combine harvester headers in this invention.

[0026] Figure 3 This is a schematic diagram illustrating the working principle of the negative pressure airflow grain recovery device for rapeseed combine harvester in this invention.

[0027] Figure 4 This is a 3D view of the nozzle.

[0028] Figure 5 This is a cross-sectional view of the nozzle.

[0029] Figure 6 This is a schematic diagram of the connection structure between the divider and the airflow field mechanism.

[0030] Figure 7 This is a 3D diagram of the structure of the top cover of the divider.

[0031] Figure 8 This is a 3D diagram of the lower cover structure of the divider.

[0032] Figure 9 This is a top view of the lower cover of the divider.

[0033] In the diagram: 1. Fan, 2. Sedimentation tank, 3. First pipeline, 4. Top cover, 5. Vertical cutter sample inlet tube, 6. Vertical cutter inoculation trough, 7. Main airflow pipe, 8. Branch airflow pipe, 9. Connecting base, 10. Divider, 11. Nozzle, 12. Vertical cutter, 13. Cutting table assembly, 14. Third pipeline, 15. Second pipeline, 16. Fan drive shaft, 17. First pulley, 18. Belt, 19. Threshing reversing box input shaft, 20. Second pulley, 21. Bottom cover, 22. Flat plate section, 23. Bending section, 24. Mounting port, 111. Straight section, 112. Opening section. Detailed Implementation

[0034] The present invention will be further described below with reference to specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Please see Figure 1 - Figure 3 An embodiment of the rapeseed combine harvester grain recovery device of the present invention includes a header assembly 13. Multiple dividers 10 and multiple cross-cutting blades (not shown) are installed side by side at the front end of the header assembly 13. A fan 1 is installed at the rear end of the header assembly 13. The fan 1 has a positive pressure airflow output end and a negative pressure airflow output end. The positive pressure airflow output end is connected to an airflow field mechanism for providing an airflow field at the front end of the header assembly via a first pipeline 3.

[0038] The airflow field mechanism includes an airflow main pipe 7 for introducing positive pressure airflow, multiple airflow branch pipes 8 installed side by side on the airflow main pipe 7, a connecting base 9 for connecting nozzles 11 and airflow branch pipes 8, and multiple nozzles 11. The nozzles 11 are installed at an angle towards the rear end of the cutting platform assembly. When the fan 1 is started, the front end of the cutting platform assembly 13 forms an airflow field opposite to the forward direction of the cutting platform assembly.

[0039] The airflow mechanism is installed between the divider 10 and the cross-cutting blade.

[0040] Vertical cutting blades 12 are installed on both sides of the cutting platform assembly 13, and vertical cutting blade inoculation grooves 6 are installed below the vertical cutting blades 12. The negative pressure airflow output end of the blower 1 is connected to the sedimentation tank 2 via the second pipeline 15, and the sedimentation tank 2 is then connected to the vertical cutting blade inoculation grooves 6 via the third pipeline 14.

[0041] The drive shaft 16 of the fan 1 is connected to the input shaft 19 of the threshing reversing box via a pulley mechanism. The pulley mechanism includes a first pulley 17, a second pulley 20, and a belt 18, with the first pulley 17 and the second pulley 20 connected by the belt 18.

[0042] Please see Figure 4 - Figure 5 The nozzle 11 includes a straight section 111 and an open section 112. One end of the straight section 111 is connected to the connecting base 9, and the other end is connected to the open section 112. The opening of the open section 112 is pressed into a flat, straight strip shape, and the width B of the straight strip shape is 2-4 mm, so that the ejected airflow is both concentrated and has a certain distribution range. The open section 112 is inclined outward relative to the straight section 111 to form an inclination angle β, the inclination angle β being in the range of 30-40°, and the open section 112 is arranged parallel to the transverse cutter, so that the airflow will diverge to a certain extent after being ejected, thereby providing an airflow field with the largest possible range. The degree of airflow divergence is controlled by the inclination angle β of the opening section 112 of the nozzle 11: when the opening width B of the nozzle 11 is 3mm, the outlet thickness of the opening section is 1mm, the outer diameter of the straight section is 26mm, the inner diameter is 18mm, the total height of the nozzle 11 is 69mm, and the width is 44mm, the inclination angle β is mainly determined by the opening section and the straight section. Different inclination angles β will result in different length ratios of the opening section and the straight section.

[0043] To ensure better convergence of airflow from each nozzle 11, the length ratio of the open section to the straight section is 7:16 when the inclination angle β is 30°; and the length ratio of the open section to the straight section is 52:17 when the inclination angle β is 35°.

[0044] The lateral distance between the nozzle 11 and the horizontal cutting blade is 35-40cm, the longitudinal distance between the nozzle 11 and the horizontal cutting blade is 1-3cm, and the nozzle 11 forms an angle of 72-78° with the horizontal plane.

[0045] Please see Figure 6 - Figure 9 The divider 10 has a fish-mouth-shaped structure with a small front end and a large rear end. In this embodiment, the divider 10 includes an upper cover 4 and a lower cover 21. The length of the upper cover 4 is greater than the length of the lower cover 21, and the upper cover 4 is provided with a mounting port 24 for mounting and positioning the nozzle 11. The lower cover 21 includes a flat plate portion 22 parallel to the horizontal plane and a bent portion 23 bent upward relative to the horizontal plane. The included angle α between the bent portion 23 and the flat plate portion 22 is 150-170°. The connecting base 9 is mounted on the flat plate portion 22, and the nozzle 11 passes through the mounting port 24 on the upper cover 4 and connects to the connecting base 9.

[0046] The working process of this invention is as follows: When the rapeseed combine harvester is started, the input shaft 19 of the threshing reversing box rotates, driving the first pulley 17 and the second pulley 20 connected by the belt 18, thereby causing the fan drive shaft 16 to operate and provide power to the fan 1. The positive pressure airflow of the fan 1 enters the airflow main 7 from both ends through the first pipe 3. Then, the positive pressure airflow passes through 12 airflow branch pipes 8 and the connecting base 9, and finally sprays out from the nozzle 11, forming an airflow field in the path of the rapeseed grains. When the rapeseed grains enter the airflow field, they are transported to the inside of the header by the positive pressure airflow.

[0047] Meanwhile, the negative pressure airflow of the blower 1 enters the sedimentation tank 2 through the second pipeline 15, and then enters the vertical cutter sampling tube 5 through the third pipeline 14. When the vertical cutter 12 is working, the rapeseed grains will fall into the vertical cutter sampling groove 6. The negative pressure airflow will collect the rapeseed grains through the third pipeline 14 into the sedimentation tank 2, thus completing the grain recovery.

[0048] When the rapeseed combine harvester is working in the field, the divider 10, in addition to dividing the rice and protecting the nozzle 11, mainly functions to prevent grass from getting tangled through its fish-mouth-shaped structure with a small front end and a large rear end.

[0049] In this embodiment, the spacing between adjacent dividers 10 is the same as the spacing between adjacent airflow branch pipes 8, both being 152mm. The flat plate portion 22 of the divider 10 is 70mm long and 45mm wide. During installation, the flat plate portion 22 is aligned with the top of the bend joint 9. The angle between the bend portion 23 and the flat plate portion 22 is 161.5°. The bend portion 23 is 167mm long, 32mm wide at the front end, and 57mm wide at the rear end. When the upper cover 4 is installed, it is embedded in the lower cover 21, so that the top surface of the upper cover 4 and the top edge of the bend portion of the lower cover 21 are on the same plane. The upper cover 4 is 342mm long, 20mm wide at the front end, and 77mm wide at the rear end.

[0050] The nozzle 11 has a total length of 69 mm and an opening of 3 mm. The opening section 112 is inclined outward at an angle of 35° relative to the straight section 111, and the width of the opening section 112 is 3 mm.

[0051] The nozzle 11 is 37cm away from the horizontal cutter and 2cm away from the vertical cutter, forming an 85° angle with the ground.

[0052] The transmission ratio between the blower drive shaft 16 and the input shaft 19 of the threshing reversing box is 3:1.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A rapeseed combine harvester grain recovery device, comprising a header assembly, a plurality of dividers and a plurality of cross cutters are installed side by side at the front end of the header assembly, characterized in that: The cutter assembly is provided with a fan, which has a positive pressure air flow output end and a negative pressure air flow output end, and the positive pressure air flow output end is connected with a first pipeline to communicate with an air flow field mechanism for providing air flow field in front end of the cutter assembly; The air flow field mechanism comprises a main air flow pipe for passing positive pressure air flow, a plurality of air flow branch pipes arranged in parallel on the main air flow pipe, a connecting base for connecting the nozzle and the air flow branch pipe, and a plurality of nozzles, which are obliquely arranged towards the rear end of the cutter assembly, and when the fan is started, the air flow field is formed in front end of the cutter assembly in the direction opposite to the forward direction of the cutter assembly; The air flow field mechanism is arranged between the divider and the horizontal cutter; Vertical cutters are arranged on both sides of the cutter assembly, and vertical cutter inoculation grooves are arranged under the vertical cutters, the negative pressure air flow output end of the fan is connected with a second pipeline to communicate with a settling tank, and the settling tank is connected with the vertical cutter inoculation grooves through a third pipeline; The nozzle comprises a straight cylinder section and an opening section, one end of the straight cylinder section is connected with the connecting base, the other end is connected with the opening section, and the opening of the opening section is a straight strip-shaped opening, and the opening section is arranged in parallel with the horizontal cutter; The opening section is inclined outwardly relative to the straight cylinder section by 30-40°, and the width of the straight strip-shaped opening is 2-4 mm; The horizontal distance between the nozzle and the horizontal cutter is 35-40 cm, the longitudinal distance between the nozzle and the horizontal cutter is 1-3 cm, and the nozzle forms an angle of 12-18° with the vertical ground direction.

2. The rapeseed combine harvester head grain recovery apparatus according to claim 1, wherein, The divider has a fish mouth structure with small front end and large rear end.

3. The rapeseed combine harvester head grain recovery apparatus according to claim 2, wherein, The divider comprises an upper cover and a lower cover, the length of the upper cover is greater than that of the lower cover, the lower cover comprises a flat plate portion parallel to the horizontal plane and a bent portion bent upward relative to the horizontal plane, the connecting base is arranged on the flat plate portion, and the nozzle is connected with the connecting base through the upper cover.

4. The rapeseed combine harvester head grain recovery apparatus according to claim 3, wherein, The angle between the bent portion and the flat plate portion is 150-170°.

5. The rapeseed combine harvester head grain recovery apparatus of claim 1 wherein, The transmission shaft of the fan is connected with an input shaft of a threshing reversing box through a belt wheel mechanism.

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