CN114467417A - Wheat pneumatic seed metering test device and test method - Google Patents
Wheat pneumatic seed metering test device and test method Download PDFInfo
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- CN114467417A CN114467417A CN202210025292.9A CN202210025292A CN114467417A CN 114467417 A CN114467417 A CN 114467417A CN 202210025292 A CN202210025292 A CN 202210025292A CN 114467417 A CN114467417 A CN 114467417A
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- 238000005452 bending Methods 0.000 claims description 33
- 241000721671 Ludwigia Species 0.000 claims description 29
- 238000009331 sowing Methods 0.000 claims description 27
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
- A01C7/081—Seeders depositing seeds in rows using pneumatic means
- A01C7/082—Ducts, distribution pipes or details thereof for pneumatic seeders
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
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Abstract
The invention discloses a wheat pneumatic seed metering test device and a test method, which solve the problems of low seed transverse distribution precision, seed damage and high blocking risk in the prior art, have the beneficial effects of simulating the same condition change during field operation, collecting seed metering quantity, calculating the consistency variation coefficient of each row and evaluating the quality of a seed metering device, and have the following specific scheme: the utility model provides a wheat strength seed metering test device, includes the rack, the rack supports seed case, seed case bottom sets up the seed metering ware, the seed metering ware bottom is connected with venturi open-top, venturi's one end is connected with the fan, the other end is connected with the seed distributor, one side of seed distributor is equipped with the pressure boost pipe of being connected with venturi, the opposite side sets up the apron that has the convex part, the body sets up a plurality of distributing pipes in one side that the pressure boost pipe set up, distributing pipe and seed metering outlet pipe intercommunication, the seed metering outlet pipe passes through the rack and supports.
Description
Technical Field
The invention relates to the field of agricultural machinery, in particular to a wheat pneumatic seed metering test device and a test method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the development of moderate and large-scale land operation, the traditional mechanical seeding equipment gradually develops towards large-scale and intelligent pneumatic centralized-arranging type, and the rice and wheat pneumatic centralized-arranging seeder has important technical advantages of high autonomy, maneuverability, productivity, easiness in loading and adjusting and the like, and has a far-reaching development prospect in the protective agricultural technology;
the inventor finds that the existing rice and wheat pneumatic centralized sowing machine has the problems of low transverse distribution precision, seed damage, high blocking risk and the like, tests are carried out on various parameters of the wheat pneumatic centralized sowing device, and the test results are used for guiding the existing rice and wheat pneumatic centralized sowing machine to have fewer test devices, and the parameters are key factors influencing the existing wheat sowing quality.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a pneumatic wheat seed metering test device to solve the problems of low transverse seed distribution precision, seed damage and high blockage risk in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a wheat strength seed metering test device, which comprises a rack, the rack supports seed case, seed case bottom sets up the seed metering ware, the seed metering ware bottom is connected with venturi open-top, venturi's one end is connected with the fan, the other end is connected with seed distributor, one side of seed distributor is equipped with the pressure boost pipe of being connected with venturi, the opposite side sets up the apron that has the convex part, the body sets up a plurality of distributing pipes in one side that the pressure boost pipe set up, distributing pipe and seed metering outlet pipe intercommunication, the seed metering outlet pipe passes through the rack and supports, wherein, the seed metering speed of seed metering ware, the power of fan can be adjusted.
According to the test device, seeds enter the seed metering device through the seed box and enter the seed distributor through the Venturi tube, the distribution of the seeds can be realized, the same condition change can be realized when the field operation is simulated on the test bed as a whole, the influence rule of various factors on the seed metering precision of the seed distributor is researched by adjusting different parameters such as the seed metering speed of the seed metering device and the power of the fan, and the theoretical basis and the design reference are provided for the further optimization of the structure of the seed distributor.
According to the pneumatic wheat seed metering test device, the seed distributors are multiple, and the seed distributors are detachably arranged on the outer side of the rack, so that different seed distributors can be detected.
According to the pneumatic wheat seed metering test device, the pipe orifice is arranged on one side of the body, the fixing lugs are arranged on the side parts of the pipe orifice and the pressure increasing pipe, and the pipe orifice is connected with the fixing lugs of the pressure increasing pipe through the fastening piece, so that the reliable connection of the pipe orifice of the body and the pressure increasing pipe is realized, and air leakage is avoided;
the inside of the pressure increasing pipe is provided with a raised fold, so that the air flow speed carrying the seeds enters the pressure increasing pipe and is further pressurized.
According to the pneumatic wheat seed metering test device, one end of the pressurizing pipe is connected with the bent pipe, and the bent pipe is connected with the venturi tube through the middle pipe;
the inner diameter of the middle pipe is gradually increased from one side of the middle pipe connected with the bent pipe to the other side of the middle pipe, so that the flow velocity of the airflow is further increased when the airflow enters the bent pipe through the middle pipe.
According to the pneumatic wheat seed metering test device, in view of structural arrangement, a side table is arranged on one side of the rack, and the seed metering outlet pipe is fixed on the side table;
considering that the sowing outlet pipes are arranged in multiple rows, the sowing outlet pipes of two adjacent rows are arranged in a staggered manner, a material receiving barrel or a material receiving bag is arranged at each sowing outlet pipe to collect wheat, the material receiving barrel is supported by the ground, and the material receiving bag can be bound on a side table.
According to the wheat pneumatic seed metering test device, the seed distributor comprises a body, the body is arranged opposite to the cover plate, and the convex part of the cover plate is far away from the pressure increasing pipe;
the distribution pipe is positioned outside the pressurization pipe.
According to the pneumatic wheat seed metering test device, the seed box protrudes out of the rack, so that seeds can be conveniently added into the seed box;
in order to stably support the seed box, the seed box is arranged on the rack through a first bracket;
the first support comprises a first bending plate, one side of the first bending plate is connected with the seed box, and the other side of the first bending plate is connected with the rack.
According to the wheat pneumatic seed metering test device, the seed distributor is arranged on the rack through the second bracket in consideration of the arrangement of the seed distributor;
the second support comprises a second bending plate, one side of the second bending plate is connected with the seed distributor, and the other side of the second bending plate is connected with the rack.
According to the pneumatic wheat seed metering test device, the rack also supports the driving mechanism, the driving mechanism is connected with the middle shaft, the middle shaft is connected with the seed metering device through the transmission mechanism, and the seed metering speed of the seed metering device is adjusted through the driving mechanism; the intermediate shaft is arranged on the rack through a bearing;
in order to stably support the driving mechanism, the driving mechanism is fixed on the rack through a third bracket;
the third support comprises a third bending plate, one side of the third bending plate is connected with the driving mechanism, and the other side of the third bending plate is connected with the rack.
In a second aspect, the invention also provides a test method of the wheat pneumatic seed metering test device, which comprises the following steps:
seed sowing: seeds are put into a seed box, a fan is connected with a power supply to generate positive pressure airflow, the positive pressure airflow enters a Venturi tube to enable the top opening of the Venturi tube to keep a negative pressure state, the seeds fall into a seed sowing device from the seed box, the seed sowing device works, and the seeds are discharged out of the seed sowing device;
adjusting: the seed flow is adjusted by adjusting the rotating speed of the seed sowing device, and the air flow speed is controlled by a fan, so that the same condition change during field operation is simulated;
conveying: the seed flow discharged by the seed metering device enters the bent pipe, and the positive pressure gas flow sends the mixture of the gas flow and the wheat seeds into the seed distributor through the pressure increasing pipe;
distributing: the wheat seeds rise at the seed distributor to contact the cover plate, form a seed flow through the separation action of the cover plate and are finally discharged through the seed outlet pipe.
The beneficial effects of the invention are as follows:
1) the invention can realize the same condition change when simulating field operation on the test bed through the wheat pneumatic seed metering test device, researches the influence rule of each factor on the seed metering precision of the pneumatic seed distributor through adjusting different parameters, and provides theoretical basis and design reference for the structure optimization of the seed distributor.
2) The invention can realize the detection of different seed distributors by replacing the seed distributors, collect the seed discharging amount of each seed discharging outlet pipe and calculate the consistent variation coefficient of each row by replacing different seed distributors and fixing the different seed distributors on the test bench, and evaluate the advantages and disadvantages of the seed discharging device.
3) According to the invention, through the arrangement of the venturi tube, the reducing intermediate tube and the pressurizing tube, after the seeds discharged by the seed sowing device enter the air flow, the speed of the air flow can be further changed, so that the seeds can enter the seed distributor at a higher speed.
4) According to the invention, through the arrangement of the side table, the arrangement of the seed outlet pipe is effectively ensured, the collection of the seeds discharged by the seed outlet pipe is convenient, and the seed distributor can be arranged at the outer side of the rack, so that the seed distributor is convenient to replace.
5) According to the seed box, the driving mechanism and the seed distributor, the seed box, the driving mechanism and the seed distributor can be stably supported through the arrangement of the first support, the second support and the third support.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a front view of a pneumatic wheat seed metering test device according to one or more embodiments of the present invention.
FIG. 2 is an isometric view of a stand of a pneumatic wheat seed metering test apparatus according to one or more embodiments of the present invention.
FIG. 3 is a top view of a side stand of a pneumatic wheat seed metering test apparatus according to one or more embodiments of the present invention.
FIG. 4 is a schematic diagram of the structure of a seed sowing device in the wheat pneumatic seed sowing test device according to one or more embodiments of the invention.
FIG. 5 is a schematic diagram of a seed distributor of a pneumatic wheat seed metering test device according to one or more embodiments of the present invention.
FIG. 6 is a schematic diagram of a structure of a pressure boost pipe in a pneumatic wheat seeding test device according to one or more embodiments of the invention.
Figure 7 is a cross-sectional view of the booster duct of figure 6 according to the invention.
FIG. 8 is a schematic diagram of a first stent structure according to one or more embodiments of the invention.
FIG. 9 is a schematic diagram of a second stent structure according to one or more embodiments of the invention.
FIG. 10 is a third stent structure according to one or more embodiments of the present invention.
In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the schematic is shown only schematically.
Wherein: 1. the seed metering device comprises a rack, 2, a seed box, 3, a seed metering device, 4, a fan, 5, a seed distributor, 6, a motor, 7, a first support, 8, an air pipe, 9, a middle pipe, 10, a second support, 11, a seed conveying pipe, 12, a seed metering outlet pipe, 13, a third support, 14, a coupler, 15, an intermediate shaft, 16, a chain wheel, 17, a chain, 101, an upper rack layer, 102, a middle rack layer, 103, a side rack, 104, a lower rack layer, 1031, a first longitudinal beam, 1032, a second longitudinal beam, 301, a seed metering device, 302, a Venturi tube, 501, a cover plate, 502, a booster pipe, 503, a bent pipe, 504, a distribution pipe, 5021, a fixing lug, 5022, a folded structure, 701, a first folded plate, 702, a first rib, 1001, a second folded plate, 1002, a second side plate, 1301, a third folded plate, 1302.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as introduced in the background art, the problems of low transverse distribution precision of seeds, damage to the seeds and high risk of blockage exist in the prior art, and the invention provides a wheat pneumatic seeding test device in order to solve the technical problems.
Example one
In a typical embodiment of the invention, referring to fig. 1 and 4, a wheat pneumatic seeding test device comprises a rack 1, wherein the rack is divided into three layers, namely an upper rack layer 101, a middle rack layer 102 and a lower rack layer 104, the upper rack layer 101 supports a seed box, the bottom of the seed box is provided with a seeding device, the seeding device comprises a seeding device 301 and a venturi tube 302, the seeding device is supported on the upper rack layer 101 through a first support 7, the bottom of the seeding device 301 is communicated with the top opening of the venturi tube, one end of the venturi tube 302 is connected with a fan 4, the other end of the venturi tube 302 is connected with a seed distributor 5 through a middle tube 9, and the seeding rate of the seeding device can be adjusted.
It can be understood that a plurality of seed distributors 5 can be arranged, and each seed distributor 5 can be detachably mounted on the outer side of the rack 1, so that different seed distributors 5 can be detected, and the seed metering amount of each seed metering outlet pipe 12 is collected and the consistent coefficient of variation of each row is calculated by replacing different seed distributors 5 and fixing the seed distributors on the test rack 1, and the quality of the seed metering device is evaluated.
As shown in fig. 5 and 6, in some examples, the seed distributor 5 includes a body, a pressurizing pipe 502 connected to the venturi pipe is provided at the lower part of the body, a cover plate 501 having a convex part is provided at the upper part of the body, a plurality of distribution pipes 504 are provided at one side of the pressurizing pipe, the distribution pipes 504 are provided around the outside of the pressurizing pipe 502, the distribution pipes 504 are communicated with the seed outlet pipe 12 through the seed conveying pipe 11, and the seed outlet pipe 12 is supported by the stand 1;
specifically, the body is a circular plate or a plate with a convex part, the convex part of the body is arranged opposite to the convex part of the cover plate 501, the convex part of the cover plate 501 is far away from the pressure increasing pipe 502, the lower part of the body is provided with a pipe orifice, the pipe orifice and the side part of the pressure increasing pipe 502 are both provided with a fixing lug 5021, the pipe orifice is connected with the fixing lug 5021 of the pressure increasing pipe 502 through a fixing bolt, an elastic cushion is placed in the middle of the pipe orifice, therefore, the sealing connection between the pipe orifice of the body and the pressure increasing pipe 502 is realized, and air leakage is avoided.
As shown in fig. 5 and 7, a raised corrugated structure 5022 is arranged inside the booster pipe 502, the corrugated structure 5022 is arranged to enable the air flow velocity carrying the seeds to enter the booster pipe 502 and then be further pressurized and accelerated, one end of the booster pipe 502 is connected with an elbow 503, the elbow 503 is connected with the venturi 302 through an intermediate pipe 9, and the bending degree of the elbow is 90 °;
the intermediate tube 9 has a gradually increasing inner diameter from the end of the intermediate tube 9 connected to the elbow 503 to the other end of the intermediate tube 9, so that the flow rate of the air flow entering the elbow 503 from the venturi tube 302 through the intermediate tube 9 is further increased by the decreasing inner diameter of the intermediate tube 9, facilitating the seed to enter the seed distributor 5 at a faster rate.
As shown in fig. 2 and 3, in consideration of the structural arrangement of the test device, a side platform 103 is arranged on one side of the rack 1, the side platform 103 is located at one end of the lower layer 104 of the rack and is arranged at a set distance from the ground, the tail end of the seed discharge outlet pipe 12 is fixed on the side platform 103, the side platform 103 comprises two cross beams connected with the rack, a plurality of rows of longitudinal beams are arranged between the two cross beams and between the two cross beams, the side far away from the rack and the middle part between the two cross beams, two rows of longitudinal beams are arranged on the side platform 103 in the embodiment, the longitudinal beams are respectively a first longitudinal beam 1031 and a second longitudinal beam 1032, a plurality of seed discharge outlet pipes 12 are arranged on the two rows of longitudinal beams in a uniformly staggered manner, and seed discharge ports are formed through the seed discharge outlet pipes 12;
considering the coincidence with the actual sowing, the seed outlet pipes 12 are also arranged in two rows, the seed outlet pipes 12 of two adjacent rows are arranged in a staggered manner, the positions and the number of the seed delivery pipes 11 arranged in a staggered manner on the side table 103 correspond to those of the seed delivery pipes 11, the tail ends of the seed delivery pipes 11 are fixedly connected with the seed outlet pipes 12, the tail ends of the seed delivery pipes 12 are provided with receiving barrels or receiving bags for collecting wheat seeds, the receiving barrels can be supported by the ground, and the receiving bags can be bound at the bottoms of the seed outlet pipes 12 on the side table 103.
Through the arrangement of the side table 103, the arrangement of the seed discharging outlet pipe 12 is effectively guaranteed, the seeds discharged from the seed discharging outlet pipe 12 are conveniently collected, and the seed distributor 5 can be arranged on the outer side of the rack, so that the seed distributor 5 is convenient to replace.
As shown in fig. 2, in this embodiment, the rack is divided into three layers, namely, an upper rack layer, a middle rack layer and a lower rack layer, wherein the upper rack layer 101 and the middle rack layer 102 are also provided with a plurality of longitudinal beams, the upper rack layer 101 is provided with two longitudinal beams, the middle rack layer 102 is provided with three longitudinal beams, and the lower rack layer 104 is provided with two cross beams. All crossbeams and longerons of this embodiment can all realize apart from adjustable, in some examples, can be through corresponding on the support body of rack 1 and side platform 103 set up the slide rail, crossbeam, longeron respectively with correspond the slide rail connection on the support body to realize the crossbeam and crossbeam, longeron and longeron between the distance adjustable.
The venturi 302 of this embodiment is connected with fan 4 through tuber pipe 8, and fan 4 passes through bolt fastening and supports on the crossbeam of rack lower floor 104, and fan 4 is through setting up the power control on the rack, and the power adopts prior art, as long as can realize that the power of fan 4 can be adjusted.
In order to add seeds into the seed box conveniently, the seed box 2 protrudes out of the upper layer 101 of the rack, and meanwhile, in order to realize stable support of the seed box, the seed box 2 is arranged on the upper layer 101 of the rack through a first support 7;
as shown in fig. 1 and 8, the first support 7 includes a first bending plate 701 and a first rib 702, the first bending plate 701 may be specifically L-shaped, one side of the first bending plate is connected to the seed box 2 through a bolt to realize fixed support of the seed box 2, the other side is fixedly connected to the beam of the upper stage 101, and the first rib 702 is welded on the first bending plate 701 in the middle to increase the strength of the first support 7.
As shown in fig. 9, in consideration of the arrangement of the seed distributor 5, the seed distributor 5 is mounted on the upper rack layer 101 through the second bracket 10, the second bracket 10 includes a second bending plate 1001 and a second side plate 1002, the second bending plate 1001 may be specifically L-shaped, one side of the second bending plate is fixedly connected to the seed distributor 5 through U-shaped bolts, the other side of the second bending plate is connected to the edge of the upper rack layer 101 close to the side table 103, and the second side plate 1002 is welded to the second bending plate 1001 in the middle to increase the strength of the second bracket 10.
As shown in fig. 1 and 10, the middle layer 102 of the rack supports a driving mechanism, the driving mechanism is connected with an intermediate shaft 15, the intermediate shaft 15 is connected with the seed metering device 301 through a transmission mechanism, the seed metering speed of the seed metering device 301 is adjusted through the driving mechanism, and the intermediate shaft 15 is installed on the middle layer 102 of the rack through a bearing;
specifically, actuating mechanism includes the motor, in order to realize carrying out the stable support to motor 6, motor 6 is fixed in rack middle level 102 through third support 13, third support 13 includes third bending plate 1301 and third muscle 1302, the third bending plate can be the U type, one side of third bending plate 1301 is passed through the bolt and is connected with motor 6, the opposite side passes through the bolt fastening on the longeron of rack middle level 102, third muscle 1302 welds on third bending plate 1301 in the middle of, in order to increase the intensity of third bending plate, the output shaft of motor 6 passes through shaft coupling 14 and is connected with jackshaft 15, jackshaft 15 passes through both sides belt seat bearing and fixes at the rack middle level, fix sprocket 16 through the key-type connection on jackshaft 15, sprocket 16 passes through chain 17 with power transmission to seed metering ware 301.
It is understood that the motor may be a servo motor or other motors;
in addition, the seed sowing device adopts the existing seed sowing device, the bottom size of the seed box is smaller than the top size, and the seed box can adopt the existing common seed box.
Example two
The invention also provides a test method of the wheat pneumatic seed metering test device, which comprises the following steps:
seed sowing: seeds are placed into the seed box 2, the fan 4 is connected with a power supply to generate positive pressure airflow, the positive pressure airflow enters the venturi tube 302 to enable the top opening of the venturi tube 302 to keep a negative pressure state, the seeds fall into the seed sowing device 301 from the seed box 2, the seed sowing device 301 works, and the seeds are discharged out of the seed sowing device 301;
adjusting: the seed flow is adjusted by adjusting the rotating speed of the seeding unit 301, and the air flow speed is controlled by the fan 4 to simulate the same condition change during field operation;
conveying: the seed flow discharged by the seed metering device 301 enters an elbow 503 through an intermediate pipe 9, and the positive pressure gas flow sends the mixture of the gas flow and the wheat seeds into the seed distributor 5 through a pressure increasing pipe 502;
distributing: wheat seeds rise at the seed distributor 5 to contact the cover plate 501, a seed flow is formed under the separation action of the cover plate 501, distribution is completed, and finally the seeds are discharged through the seed discharging outlet pipe 12, and the tail end of the seed discharging outlet pipe 12 collects the discharged seeds through a material receiving barrel or a material receiving bag.
The embodiment can realize the same condition change when simulating field operation on the test device through the provision of the wheat pneumatic seed metering test device, researches the influence rule of each factor on the seed metering precision of the pneumatic seed distributor through adjusting different parameters, and provides theoretical basis and design reference for the optimization of the structure of the seed distributor.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a wheat strength seed metering test device, a serial communication port, the on-line screen storage device comprises a rack, the rack supports seed case, seed case bottom sets up the seed metering ware, the seed metering ware bottom is connected with venturi open-top, venturi's one end is connected with the fan, the other end is connected with seed distributor, one side of seed distributor is equipped with the pressure boost pipe of being connected with venturi, the opposite side sets up the apron that has the convex part, the body sets up a plurality of distributing pipes in one side that the pressure boost pipe set up, distributing pipe and seed metering outlet pipe intercommunication, the seed metering outlet pipe passes through the rack and supports, wherein, the seed metering speed of seed metering ware, the power of fan can be adjusted.
2. The pneumatic wheat seed metering test device of claim 1, wherein the seed distributor is provided with a plurality of seed distributors, and each seed distributor is detachably arranged on the outer side of the rack.
3. The pneumatic wheat seed metering test device according to claim 1, wherein a pipe orifice is arranged on one side of the body, fixing lugs are arranged on the side parts of the pipe orifice and the pressure increasing pipe, and the pipe orifice is connected with the fixing lugs of the pressure increasing pipe through fasteners;
the inside of the pressure boosting pipe is provided with a convex fold.
4. The pneumatic wheat seed metering test device according to claim 1, wherein one end of the booster pipe is connected with an elbow pipe, and the elbow pipe is connected with the venturi pipe through an intermediate pipe;
the inner diameter of the middle pipe is gradually increased from one side connected with the bent pipe to the other side of the middle pipe.
5. A wheat pneumatic seed metering test device according to claim 1, wherein a side table is arranged on one side of the rack, and the seed metering outlet pipe is fixed on the side table;
the seed outlet pipes are arranged in multiple rows, and the seed outlet pipes of two adjacent rows are arranged in a staggered manner.
6. The pneumatic wheat seed metering test device of claim 1, wherein the seed distributor comprises a body, the body is arranged opposite to the cover plate, and a convex part of the cover plate is arranged far away from the pressure increasing pipe;
the distribution pipe is positioned outside the pressurization pipe.
7. The pneumatic wheat seed metering test device according to claim 1, wherein the seed box protrudes out of the rack;
the seed box is arranged on the rack through a first bracket;
the first support comprises a first bending plate, one side of the first bending plate is connected with the seed box, and the other side of the first bending plate is connected with the rack.
8. The pneumatic wheat seed metering test device of claim 1, wherein the seed distributor is mounted on the rack through a second bracket;
the second support comprises a second bending plate, one side of the second bending plate is connected with the seed distributor, and the other side of the second bending plate is connected with the rack.
9. A wheat pneumatic seed metering test device according to claim 1, characterized in that the rack is further supported with a driving mechanism, the driving mechanism is connected with a middle shaft, the middle shaft is connected with the seed metering device through a transmission mechanism, and the middle shaft is mounted on the rack through a bearing;
the driving mechanism is fixed on the rack through a third bracket;
the third support comprises a third bending plate, one side of the third bending plate is connected with the driving mechanism, and the other side of the third bending plate is connected with the rack.
10. A test method of a wheat pneumatic seed metering test device according to any one of claims 1 to 9, characterized by comprising the following steps:
seed sowing: seeds are put into a seed box, a fan is connected with a power supply to generate positive pressure airflow, the positive pressure airflow enters a Venturi tube to enable the top opening of the Venturi tube to keep a negative pressure state, the seeds fall into a seed sowing device from the seed box, the seed sowing device works, and the seeds are discharged out of the seed sowing device;
adjusting: the seed flow is adjusted by adjusting the rotating speed of the seed sowing device, and the air flow speed is controlled by a fan, so that the same condition change during field operation is simulated;
conveying: the seed flow discharged by the seed metering device enters the bent pipe, and the positive pressure gas flow sends the mixture of the gas flow and the wheat seeds into the seed distributor through the pressure increasing pipe;
distributing: the wheat seeds rise at the seed distributor to contact the cover plate, form a seed flow through the separation action of the cover plate and are finally discharged through the seed outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025292.9A CN114467417B (en) | 2022-01-11 | 2022-01-11 | Wheat pneumatic seed sowing test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025292.9A CN114467417B (en) | 2022-01-11 | 2022-01-11 | Wheat pneumatic seed sowing test device and test method |
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| Publication Number | Publication Date |
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| CN114467417A true CN114467417A (en) | 2022-05-13 |
| CN114467417B CN114467417B (en) | 2023-11-21 |
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| CN202210025292.9A Active CN114467417B (en) | 2022-01-11 | 2022-01-11 | Wheat pneumatic seed sowing test device and test method |
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| CN102918964A (en) * | 2011-08-11 | 2013-02-13 | 华中农业大学 | Test bed for pneumatic rape seed sowing device |
| US20170049040A1 (en) * | 2015-08-20 | 2017-02-23 | Kinze Manufacturing, Inc. | Planter with seed delivery apparatus |
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| CN114467417B (en) | 2023-11-21 |
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