A pneumatic rapeseed shavings recovery device and a low-position harvesting platform

Abstract

This invention discloses a pneumatic rapeseed seed recovery device and a low-position seed-reeling cutter. The pneumatic rapeseed seed recovery device includes multiple horizontally arranged dividing tips, with an inlet channel formed between every two dividing tips. It also includes a pneumatic device, which includes a blower and an air supply pipe, with the air supply pipe arranged horizontally on both sides. A collection plate is fixed to the rear side of each dividing tip. The air supply pipe is connected to an air outlet unit, which is located below the collection plate. During operation, when the dividing tips intervene between rapeseed plants, and during the process of the rapeseed stems being cut by the horizontal cutter, some pods will burst due to the mutual traction between the stems, causing rapeseed seeds to fall out. The airflow blown by the air outlet unit can pass upward through the gap between two adjacent collection plates to blow some of the fallen rapeseed seeds upward to the collection plate, so that the rapeseed seeds can be transported and collected backward from the collection plate, effectively reducing the seed loss caused by pod bursting during dividing and feeding.

Description

Technical Field

[0001] This invention relates to the field of agricultural harvesting machinery technology, and in particular to a pneumatic recovery device for shattered rapeseed during combine harvesting and a low-position cutting platform. Background Technology

[0002] Combined harvesting of rapeseed allows for direct harvesting of grains in a single pass, offering convenience, efficiency, and flexibility. However, the high proportion of harvesting table loss in current rapeseed combine harvesters is mainly due to the following reasons:

[0003] (1) Cutting and actively pulling the seedlings in rows, with the header and the pulling teeth of the reel directly acting on the pods. Rapeseed in my country generally has the characteristics of tall plants, many branches and intertwined branches. At present, the traditional rapeseed combine harvester uses the row vertical cutter to open the path and the eccentric reel to pull the seedlings. The row vertical cutter forcibly cuts the path, and the seeds fall directly into the field, resulting in high seed loss. The eccentric reel forcibly pulls the seedlings, and the reel's teeth have a strong impact and forced pulling effect on the rapeseed pods, resulting in high seed loss.

[0004] (2) Inappropriate parameters of the reel. There are large differences in the height of rapeseed plants in the field, resulting in inconsistent maturity at harvest, and some rapeseed even lodging. For traditional eccentric reels, when the rapeseed is highly mature, the speed of the reel needs to be reduced to reduce the impact on the diagonal fruits. The position of the reel needs to be adjusted according to the branching of the rapeseed plants. When the height of the rapeseed plants changes or they lodge, the height of the reel needs to be adjusted.

[0005] In the prior art, the applicant's earlier applications CN109362339A and CN109362337A disclose a negative pressure grain recovery mechanism installed on the cutter section of the header to recover grains that fall during the cutting process; patent CN103518489A discloses a field grain collection method and device for rapeseed combine harvesters, which is equipped with a negative pressure collection channel, a positive pressure manifold, a collection unit, and a seed-shaping plate, and also includes a positive pressure motor and a negative pressure motor. During operation, the fallen rapeseed grains fall onto the horizontal baffle, and the negative pressure airflow of the negative pressure fan collects the rapeseed grains through the collection unit. When the inlet of the collection unit is blocked by large debris, the positive pressure fan outputs positive pressure airflow to clear the blockage and keep the collection channel unobstructed. It can be seen that in the above-mentioned prior art, the collection of fallen grains mainly relies on negative pressure absorption collection, which is prone to causing channel blockage. The positive pressure mechanism included in patent CN103518489A is also used for clearing blockage.

[0006] Another prior application by the applicant, CN109618648A, discloses a pneumatic blowing device for a combine harvester header. This device includes a pneumatic blowing assembly comprising a blower, an air collection pipe, and multiple nozzles connected to the air collection pipe. The airflow blown backward through the nozzles can blow grains that fall during harvesting into a storage structure. In this design, the pneumatic blowing assembly is entirely positioned above the divider, and the nozzles extend from top to bottom. This not only occupies a large volume but also affects the division and placement of rapeseed grains. In actual use, it interferes with normal harvesting operations, resulting in poor performance. Summary of the Invention

[0007] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a rapeseed grain shattering pneumatic recovery device and a low-position reaping header that can effectively reduce grain loss during rapeseed combine harvesting and has a low failure rate.

[0008] Technical solution: To achieve the above objectives, the present invention provides a pneumatic recovery device for rapeseed grains, which includes a plurality of horizontally arranged tillers, with an inlet channel formed between every two tillers; it also includes a pneumatic device, which includes a blower and an air supply pipe, the air supply pipe being arranged horizontally on the left and right sides.

[0009] Each tiller tip is fixed to a collection plate on its rear side; the air supply pipe is connected to an air outlet unit, which is located below the collection plate; during operation, when the tiller tip intervenes between rapeseed plants, and during the process of the rapeseed stems being cut by the cross-cutting knife, due to the mutual entanglement between the stems, some pods will burst during the tillering process, causing rapeseed grains to fall out. The airflow blown by the air outlet unit can pass upward through the gap between two adjacent collection plates to blow some of the fallen rapeseed grains upward to the collection plate, so that the rapeseed grains can be transported and collected backward by the collection plate, effectively reducing the grain loss caused by the bursting of pods during tillering.

[0010] Furthermore, each of the feeding channels has a pair of air outlet units below it; the air outlet unit has a branch pipe that is perpendicular to the air conveying pipe, that is, along the feeding direction, and a long strip-shaped air outlet is formed on the branch pipe. The air blowing direction of the air outlet is inclined relative to the vertical direction, and the inclination direction of the air blowing direction of the two air outlet units in the same pair is opposite; the left and right sides of the collecting plate have inclined surfaces.

[0011] Furthermore, the air outlet unit is provided with a long rectangular air nozzle corresponding to the position of the air outlet, and the air outlet end of the air nozzle has multiple air holes arranged in a linear array. In this way, the long rectangular air outlet can blow out a stable directional airflow, and the airflow force at all points of the air outlet is relatively uniform.

[0012] Furthermore, the upper end of the collecting plate has a concave collecting groove; and the bottom of the collecting groove is inclined with the front higher than the back.

[0013] Furthermore, the collection trough is narrow at the front and wide at the back, which can prevent rapeseed grains from clogging the collection trough.

[0014] A low-position crop harvester includes the aforementioned rapeseed sludge pneumatic recovery device, and further includes a cross-cutting blade located below the rear side of the collecting plate and a volute located at the rear end of the collecting plate; all the collecting plates are connected to the same volute, and a feeding auger is rotatably installed inside the volute.

[0015] Furthermore, spiral augers with a lower front and higher rear are provided above both ends of the volute. These spiral augers serve to separate the rapeseed within the working width from the rapeseed outside the working width.

[0016] Furthermore, the fan is fixed to one end of the volute.

[0017] Furthermore, a toothed chain is installed on the lower side of the collecting plate. The operation of the toothed chain can assist the stalks in entering the feeding channel and make the stalks move along the feeding channel.

[0018] During operation, the low-position cutting head is installed at the front of the rapeseed harvester. The dividing tip intervenes between the rapeseed stalks, allowing them to enter the infeed channel. The toothed chain assists the rapeseed stalks in moving backward along the infeed channel. When the stalks reach the position of the transverse cutting blade, they are cut off. During the dividing, cutting, and stalk pulling processes, some rapeseed grains that have broken off due to the stalk pulling are blown into the collection trough of the collection plate by the airflow from the air outlet unit, and then enter the volute along the collection trough. The feeding auger then collects the grains laterally. The feeding auger also has a grating mechanism to guide the harvested rapeseed.

[0019] Beneficial effects: The rapeseed sludge pneumatic recovery device and low-position harvesting platform of the present invention have the following beneficial effects:

[0020] By setting up a pneumatic device, the air outlet unit of the pneumatic device can blow the rapeseed grains that fall during the separation, feeding, and stem cutting processes into the collection trough of the collection plate, effectively reducing the loss rate. Compared with the negative pressure collection method in the existing technology, it does not have problems such as air passage blockage, has a low failure rate, and can operate continuously.

[0021] The air outlet unit has a reasonable structural design and layout. On the one hand, because the air outlet is slanted, the air outlet unit can be hidden below the collecting plate without narrowing the grain inlet channel or affecting grain feeding. On the other hand, the air outlet unit blows out a slanted airflow, and the thrust of the airflow can make the grains move against the slanted surface into the collecting trough. Under the action of gravity, they move backward along the collecting trough and enter the volute of the header, realizing the collection and aggregation of fallen grains. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram of a low-level harvesting platform with a rapeseed granule pneumatic recovery device;

[0023] Figure 2 A top view of a low-level harvesting platform with a rapeseed hull pneumatic recovery device;

[0024] Figure 3 A side view of a low-level harvesting platform with a rapeseed hull pneumatic recovery device;

[0025] Figure 4 This is a first-person view structural diagram of the pneumatic device.

[0026] Figure 5 This is a second-view structural diagram of the pneumatic device.

[0027] Figure 6 This is a layout diagram of the front side of the cutting platform;

[0028] Figure 7 This is a structural diagram of the aggregate plate.

[0029] In the diagram: A - Rapeseed granule pneumatic recovery device; 1 - Blower; 2 - Air supply pipe; 3 - Cross-cutting blade; 4 - Toothed chain; 5 - Dividing tip; 6 - Volute; 7 - Spiral auger; 8 - Feeding auger; 9 - Collection plate; 9a - Inclined surface; 9b - Collection trough; 10 - Air outlet unit; 10a - Branch pipe; 10b - Air outlet; 10c - Air nozzle; 10d - Air hole. Detailed Implementation

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] like Figure 1-3 The image shows a low-level harvesting platform with a rapeseed hull pneumatic recovery device A. The device A includes multiple laterally arranged tillering tips 5, with an infeed channel formed between every two tillering tips 5. It also includes a pneumatic device, such as... Figure 4As shown, the pneumatic device includes a blower 1 and an air supply pipe 2, which is arranged horizontally on the left and right sides; a collection plate 9 is fixed to the rear side of each of the dividing tips 5; the air supply pipe 2 is connected to an air outlet unit 10, which is located below the collection plate 9.

[0032] During operation, when the dividing tip 5 intervenes between rapeseed plants, and when the rapeseed stems are cut by the cross-cutting blade, some pods may burst due to stem vibration, causing rapeseed grains to fall out. The airflow blown by the air outlet unit 10 can pass upward through the gap between two adjacent collection plates 9 to blow some of the fallen rapeseed grains upward to the collection plate 9, so that the rapeseed grains can be transported and collected backward by the collection plate 9. This effectively reduces the grain loss caused by the bursting of pods during the dividing process. Compared with the negative pressure collection method in the prior art, there are no problems such as blocked air passages, the failure rate is low, and continuous operation is possible.

[0033] Specifically, each of the inlet channels has a corresponding pair of outlet units 10 below it; such as Figure 4-5 As shown, the air outlet unit 10 has a branch pipe 10a perpendicular to the air supply pipe 2, that is, along the direction of inlet. An elongated air outlet 10b is formed on the branch pipe 10a. The air blowing direction of the air outlet 10b is inclined relative to the vertical direction, and the inclination directions of the air blowing directions of the two air outlet units 10 in the same pair are opposite. Figure 7 As shown, the left and right sides of the collecting plate 9 have inclined surfaces 9a.

[0034] The air outlet unit 10 has a rectangular air outlet 10c positioned corresponding to the air outlet 10b. The air outlet 10c has multiple air holes 10d arranged in a linear array at its outlet end. This allows the rectangular air outlet 10b to blow out a stable, directional airflow, and the airflow force is relatively uniform throughout the outlet 10b. Actual measurements show that the air velocity capable of suspending rapeseed grains is between 6.24 and 7.64 m / s, with the air velocity at each outlet 10b being no less than 8 m / s.

[0035] like Figure 7 As shown, the upper end of the collecting plate 9 has a concave collecting groove 9b; and the bottom of the collecting groove 9b is inclined, with the front higher than the back. The collecting groove 9b is narrower at the front and wider at the back, which can prevent rapeseed grains from clogging the collecting groove 9b.

[0036] With the above structure, on the one hand, since the air blowing direction of the air outlet 10b is inclined, the air outlet unit 10 can be hidden below the collecting plate 9, which will not narrow the grain inlet channel and will not affect the grain inlet. On the other hand, the air outlet unit 10 blows out an oblique airflow, and the thrust of the airflow can make the grains move against the inclined surface 9a into the collecting trough 9b, and under the action of gravity, move backward along the collecting trough 9b and enter the volute 6 of the header, realizing the collection and aggregation of fallen grains.

[0037] The present invention also provides a low-position harvesting header, such as Figure 1-3 As shown, it includes the aforementioned pneumatic rapeseed grain recovery device A, and also includes a cross-cutting blade 3 located below the rear side of the collecting plate 9 and a volute 6 located at the rear end of the collecting plate 9; all the collecting plates 9 are connected to the same volute 6, and a feeding auger 8 is rotatably installed inside the volute 6. Figure 6 As shown, the cross-cutting blade 3 is positioned between the collecting plate 9 and the air supply pipe 2. Spiral augers 7, with a lower front and higher rear, are installed above both ends of the volute 6. These spiral augers 7 function to separate the rapeseed within the working width from the rapeseed outside the working width. The blower 1 is fixed to one end of the volute 6.

[0038] A toothed chain 4 is installed on the lower side of the collecting plate 9. The operation of the toothed chain 4 can assist the stalks to enter the feeding channel and make the stalks move along the feeding channel.

[0039] During operation, the low-position cutting head is installed at the front of the rapeseed harvester. The dividing tip 5 intervenes between the rapeseed stalks, allowing the stalks to enter the infeed channel. The toothed chain 4 assists the rapeseed stalks in moving backward along the infeed channel. When the stalks reach the position of the transverse cutting blade 3, they are cut by the transverse cutting blade 3. During the dividing, infeeding, and cutting processes, some rapeseed grains that fall due to the stalk shaking and the pods bursting are blown by the airflow from the air outlet unit 10 into the collection trough 9b of the collection plate 9, and then enter the volute 6 along the collection trough 9b. The feeding auger 8 then collects the grains laterally. The feeding auger 8 also has a grating mechanism to guide the harvested rapeseed.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rapeseed shattering pneumatic recovery device (A) comprising a plurality of transversely arranged split tips (5), each two of which form an entry channel; and a pneumatic device comprising a fan (1) and a gas conveying pipe (2); characterized in that: a collecting plate (9) is fixed to the rear side of each split tip (5); the gas conveying pipe (2) is connected to an air outlet unit (10) which is located below the collecting plate (9); the air flow blown by the air outlet unit (10) can pass upward through the gap between two adjacent collecting plates (9); a pair of air outlet units (10) corresponding to each entry channel are arranged below; the air outlet units (10) have a branch pipe portion (10a) arranged vertically to the gas conveying pipe (2), the branch pipe portion (10a) has a long strip-shaped air outlet opening (10b) formed thereon, the blowing direction of the air outlet opening (10b) is inclined relative to the vertical direction, and the inclination directions of the blowing directions of the two air outlet units (10) of the same pair are opposite; the left and right sides of the collecting plate (9) have inclined surfaces (9a); the air outlet unit (10) is hidden below the collecting plate (9), the upper end of the collecting plate (9) has a recessed collecting groove (9b); the air outlet unit (10) blows oblique air flow, the thrust of the air flow makes the seeds move against the inclined surface (9a) into the collecting groove (9b). a long strip-shaped air outlet nozzle (10c) corresponding to the position of the air outlet opening (10b) is arranged on the air outlet unit (10), the air outlet end of the air outlet nozzle (10c) has a plurality of air holes (10d) arranged in a straight line array.

2. The oilseed rape loss air recovery device (A) according to claim 1, characterized in that, The bottom of the collecting groove (9b) is inclined from high in front to low in back.

3. The oilseed rape seed drop pneumatic recovery device (A) according to claim 1, characterized in that, The collecting groove (9b) is narrow in front and wide in back.

4. The oilseed rape seed drop pneumatic recovery device (A) according to claim 3, characterized in that, It comprises the rapeseed shattering pneumatic recovery device (A) of any one of claims 1-4, further comprising a transverse cutter (3) arranged below the rear side of the collecting plate (9) and a volute (6) arranged at the rear end of the collecting plate (9); all the collecting plates (9) are connected to the same volute (6), and a feeding auger (8) is rotatably installed in the volute (6).

5. A low profile draper header characterized by, The upper part of the left and right ends of the volute (6) is provided with a front-low rear-high spiral sub-auger (7).

6. The low-profile pickup header of claim 5 wherein, The fan (1) is fixed to one end of the volute (6).

7. The low-profile pickup header of claim 5 wherein, The lower side of the collecting plate (9) is provided with a chain (4).

8. The low-profile pickup header of claim 5 wherein, ​

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