A blocking type air seed meter for precision seeding of breeding plots

Abstract

The application provides a blocking type air suction seed metering device for breeding plot precision seeding, which comprises a front shell unit, a rear shell unit, a seed metering unit, an execution unit, a monitoring system and a host computer. The front shell unit is hingedly connected to one end of the rear shell unit, and the other end is detachably provided with a connecting piece to realize the opening and closing of the front shell unit relative to the rear shell unit. The seed metering unit is arranged in the rear shell unit and located between the front shell unit and the rear shell unit. The execution unit and the monitoring system are arranged in the rear shell unit. The execution unit is connected with the front shell unit and the rear shell unit. The monitoring system comprises a camera assembly and an infrared metering assembly. The host computer is connected with the execution unit and the monitoring system to record and process the monitoring information of the monitoring system and transmit action information to the execution unit. In this way, the automation and intelligence degree of the device is improved, the accuracy and cleanliness of seed metering and seed spacing are improved, and the plot seeding data is easy to control and analyze.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seed equipment, in particular to a blocking seed metering device for precision seeding of breeding plots. BACKGROUND

[0002] The planting link of corn plot breeding test is quite cumbersome. In the process of corn breeding and selection, different varieties are planted in each plot, and the plot area is small. When sowing, the seed needs to be frequently replaced. The sowing machine needs to be frequently stopped for seed replacement, which seriously affects the production efficiency and is not suitable for plot sowing operation. Seed industry mechanization is an important foundation and prerequisite for modern seed industry. With the continuous development of seed industry mechanization in China, the requirements for mechanized operation are becoming higher and higher. Corn plot special sowing machine is also developing. Crop variety breeding is the core stage of seed industry research and development, and thousands of varieties need to be planted in the same test field at the same time, in the same place. After cultivation under the same conditions, the high-yield varieties are finally selected and entered into the next generation of breeding. After multiple iterations, high-yield varieties are obtained.

[0003] Each variety is planted in a small plot with a specified length and width, which is called a breeding test plot. During the plot sowing process, the following requirements are required:

[0004] 1. Only a small amount of seed of one variety is sown in each plot, and a different variety is switched in the next plot. The varieties in the plots cannot be mixed, that is, the seed of the previous plot cannot be left in the next plot.

[0005] 2. The interval between each row of plots and the next row of plots forms an "interval passage". The interval passage cannot be sown. The passage is used to isolate the varieties of the front and rear plots, reduce the mutual influence between the varieties, and facilitate researchers to walk in the interval passage when investigating in the field, and facilitate the plot harvester to distinguish different plots when harvesting.

[0006] 3. Each plot requires the same number of seeds, the same depth of sowing, and the same spacing of sowing (also known as "plant spacing"). In this way, the initial state of seed development can be ensured to be the same, so that each plot can be compared under the same conditions.

[0007] For breeding tests, the larger the test amount and the more test sites, the better the performance of a variety can be seen. Therefore, it is necessary to sow at multiple test sites, with thousands of plots sown at each test site. In order to ensure the uniformity of the climate conditions of the test, the sowing at each test site requires to be completed in the shortest possible time.

[0008] In order to realize a large number of cell seeding in a short time and meet the special requirements of cell seeding, a cell seeding machine specially designed for cell seeding must be used. The cell seeding machine is divided into a cell strip seeding machine and a cell precision seeding machine. The cell strip seeding machine is to uniformly spread the seeds of one variety into the same cell through all the input seeders. After the seeds germinate, the extra seedlings are removed by hand, and the equidistant seedlings are left. It is time-consuming and labor-intensive. The cell precision seeding machine is more advanced, can seed single seeds with a fixed plant spacing, realizes precision and precision seeding, and does not need manual spacing after germination, which is more in line with the trend of mechanization. Most components of the cell precision seeding machine and the existing field precision seeding machine can be used in common, such as fertilizer furrow opener, seeding furrow opener, press wheel, profiling depth limiting wheel and seeding unit. The main difference between the cell precision seeding machine and the existing field precision seeding machine lies in that the cell precision seeding machine needs to frequently change seeds and clean seeds, and the seeders for cell seeding are specially designed. The existing cell precision seeding machine seeder on the market has the following shortcomings:

[0009] 1. Due to the lack of limiting mechanism, there is excessive seeding in the interval passage between the cells that should not be seeded, resulting in germination in the interval passage, poor alignment effect of the interval passage, poor length consistency, increased mutual influence of the varieties during later growth, and impact on subsequent researchers' field investigation and harvester harvesting;

[0010] 2. The existing technology uses time to control the action of each door in the seeder, and the driving speed of the seeding machine fluctuates due to the unevenness and softness of the ground surface in the field. Therefore, the use of time to control the action of the seeder will make the plant spacing of each cell and the length of the interval passage greatly different, and the seeding is extremely chaotic;

[0011] 3. The existing cell precision seeding machine seeder lacks monitoring equipment inside the seeder, cannot monitor the operation inside the seeder, cannot determine the malfunctioning mechanical parts in time, and affects the seeding effect. Moreover, the existing cell seeder does not have the function of detecting the number of seeds seeded, cannot record the seeding situation in real time, and is not convenient for the later management of breeding tests.

[0012] Therefore, the existing technology needs to be further improved and improved. SUMMARY

[0013] The present application provides a blocking type seeder for breeding cell precision seeding to solve the problems in the prior art that the seeder is easy to cause interval germination, affect the harvesting research, the seeding environment is not the same, easy to cause seeding chaos, lack of monitoring equipment, low intelligent degree, and difficult to plan accurate seeding research and test management.

[0014] The technical scheme adopted by the present application is:

[0015] The application provides a blocking type air suction seed dispenser for precision seeding of breeding plots, which comprises a front shell unit, a rear shell unit, a seed discharge unit, an execution unit, a monitoring system and a host computer. The front shell unit is hingedly connected to one end of the rear shell unit, and the other end is detachably provided with a connecting piece to realize the opening and closing of the front shell unit relative to the rear shell unit. The seed discharge unit is arranged in the rear shell unit and between the front shell unit and the rear shell unit. The execution unit and the monitoring system are arranged in the rear shell unit. The execution unit is connected with the front shell unit and the rear shell unit to drive the blocking type air suction seed dispenser. The monitoring system comprises a camera assembly and an infrared counter assembly to monitor the seed discharge condition and the seed discharge quantity in the blocking type air suction seed dispenser. The host computer is connected with the execution unit and the monitoring system to record and process the monitoring information of the monitoring system and transmit action information to the execution unit.

[0016] The rear shell unit comprises a blocking assembly, a first seed guide plate and a second seed guide plate. The blocking assembly is rotationally connected to the inner side of the rear shell to block the excess seeds. The first seed guide plate is arranged at the central position of the rear shell unit and is provided with an inclined surface with an angle of 37° with the horizontal plane. The second seed guide plate is arranged below the first seed guide plate and is connected to the bottom of the rear shell through a counter fixing plate. The second seed guide plate is provided with an inclined surface with an angle of 30° with the horizontal plane and is connected to the seed cleaning area. The blocking assembly comprises a blocking plate and a linkage plate. The blocking plate and the linkage plate are respectively hingedly connected to the inner side wall of the rear shell and the extension segment of the first seed guide plate. The blocking plate and the linkage plate are provided with a blocking shaft and a linkage shaft at the rotation center. The extension segment is arranged below the inclined surface of the first seed guide plate. The side of the linkage plate and the blocking plate away from the blocking shaft and the linkage shaft can contact the surface of the second seed guide plate.

[0017] As a preferred embodiment of the application, the front shell unit comprises a front shell, a negative pressure pipeline joint, a sealing gasket, a pressing plate, a clamping pad and a limiting pad. The negative pressure pipeline joint is arranged at the edge of the outer surface of the front shell. The pressing plate is arranged at the inner surface of the front shell. The sealing gasket is arranged between the pressing plate and the front shell. The clamping pad is arranged at the side of the pressing plate away from the sealing gasket. The limiting pad is arranged at the outer surface of the front shell. The clamping pad, the pressing plate and the limiting pad are collinear with the center of the front shell.

[0018] As a preferred embodiment of the application, the rear shell unit further comprises a rear shell, an inlet door plate, an inlet assembly and a gear set. The inlet door plate is arranged between the inlet assembly and the inner side of the rear shell to turn on and off the seed inlet. The inlet assembly is arranged at the outer side of the rear shell and communicates with the inside of the rear shell to add seeds. The gear set is arranged at the central position of the outer side of the rear shell. The gear set is in transmission connection with the execution unit.

[0019] As a preferred embodiment of the present application, the rear shell unit further comprises a buffer area, a seed filling area and a seed cleaning area, which are arranged on the inner side of the rear shell, the buffer area and the seed filling area are arranged on both sides of the seed inlet door respectively, and the seed cleaning area is arranged below the seed filling area, and a seed cleaning door is arranged between the seed cleaning area and the seed filling area.

[0020] As a preferred embodiment of the present application, the seed inlet assembly comprises an automatic seed inlet pipe, a seed storage chamber, a seed storage chamber cover, a manual seed feeding bucket and a seed cleaning pipe joint, the seed storage chamber is arranged on the outer side of the rear shell, the top of the seed storage chamber is provided with a seed storage chamber cover, the automatic seed inlet pipe is arranged on the top of the seed storage chamber cover, the manual seed feeding bucket is arranged above the seed filling area, and the seed cleaning pipe joint is connected with the seed cleaning area at one end and is provided with a seed cleaning pipe at the other end.

[0021] As a preferred embodiment of the present application, the seed distribution unit comprises a seed distribution disc, an inner seed scraping plate, an outer seed scraping plate, a pointer, a limiting plate, a pointer fixing plate, a transmission shaft and a second bevel gear, the gear set comprises a gear box, a gear shaft and a first bevel gear, the center of the seed distribution disc is provided with a hexagonal hole, one end of the transmission shaft is connected with the hexagonal hole of the seed distribution disc, the other end is connected with the second bevel gear, the second bevel gear is engaged with the first bevel gear, the gear box is arranged on the center of the outer side of the rear shell, and the gear shaft passes through the gear box transversely and is connected with the first bevel gear; the inner seed scraping plate is arranged on the inner side of the rear shell, the bottom of the outer seed scraping plate is connected with the limiting plate, the limiting plate is rotationally connected with the pointer, the pointer is arranged in the pointer fixing plate, and the pointer fixing plate is arranged on the side edge of the rear shell unit close to the front shell.

[0022] As a preferred embodiment of the present application, the execution unit comprises a seed inlet cylinder, a blocking cylinder, a seed cleaning cylinder, a parallel four-bar mechanism, a connecting rod, a first Y-shaped connector and a second Y-shaped connector, the seed inlet cylinder is arranged above the seed storage chamber cover and is connected with the seed inlet door, so as to drive the seed inlet door to move vertically, one end of the blocking cylinder is provided with the first Y-shaped connector, the other end is connected with the seed cleaning cylinder, the parallel four-bar mechanism is arranged at the first Y-shaped connector and is connected with a linkage shaft and a blocking shaft, the second Y-shaped connector is arranged at the other end of the seed cleaning cylinder and is connected with one end of the connecting rod, and the connecting rod is rotationally connected with a seed cleaning shaft.

[0023] As a preferred embodiment of the present application, the camera assembly comprises a first camera, a second camera, a third camera and a fourth camera, which are all arranged on the rear shell unit, the rear shell is provided with mounting holes for mounting the four cameras, the first camera is arranged on the outer side of the seed storage chamber, the second camera is arranged on the top of the rear shell above the seed filling area, the third camera is arranged on one side of the inner seed scraping plate and the outer seed scraping plate, and the fourth camera is arranged on the rear shell above the blocking plate and the linkage plate.

[0024] As a preferred embodiment of the application, the infrared counting component comprises an infrared counter fixing plate, a first infrared counter and a second infrared counter, the infrared counter fixing plate is arranged below a seed dropping port of the seed metering device and fixedly connected with a bottom of the rear shell, the first infrared counter and the second infrared counter are arranged in the rear shell unit, and the first infrared counter and the second infrared counter are fixed on the infrared counter fixing plate and oppositely arranged.

[0025] Thanks to the above technical solutions, the application has the following technical effects:

[0026] 1. The application provides a blocking type air suction seed metering device for precision seeding of breeding plots, which is internally provided with a blocking structure through arrangement of a seed metering unit and an execution unit, so as to realize automatic switching between opening and closing of a seed dropping port, block extra seeds from entering the seed dropping port, and realize no seeding at plot interval positions, thereby ensuring consistency of the length of plot interval passages; the inner and outer seed scraping plates are arranged, so as to effectively reduce the reseeding rate of the plot seed metering device and save time and labor for manual seedling spacing in the later period.

[0027] 2. The application realizes switching and connection between seed feeding, seed filling, seed metering, seed blocking and seed cleaning through alternating opening and closing of various blocking plates, linkage plates, seed cleaning door plates and seed feeding door plates, so as to quickly and without residue switch between different plot varieties, accurately and precisely block extra seeds, and not interfere with seed filling and seed cleaning, thereby preventing varieties from mixing between plots, greatly improving the self-cleaning rate of the device, and improving the operation efficiency and automation level of the plot seed metering device.

[0028] 3. The application is provided with four monitoring cameras for monitoring whether there are seeds in the buffer area, the seed filling and cleaning conditions of the seed filling area, the action effect of the inner and outer seed scraping plates, and the opening and closing states of the blocking plate and the cleaning door, so as to realize timely control of the operator over faults through real-time monitoring and recording of the working conditions in the seed metering device.

[0029] 4. The application is provided with an infrared counting device at the seed dropping port of the seed metering device, which automatically senses and counts the seeds discharged by the seed metering device, so as to measure and record the seeding amount data of each plot, thereby facilitating post-management of breeding tests. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are included to provide a further understanding of the application, form a part of the application and serve to explain the application, but do not constitute improper limitations on the application. In the drawings:

[0031] Figure 1A general structure diagram of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0032] Figure 2 A combined structure diagram of a front shell and a rear shell of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0033] Figure 3 A rear shell unit structure diagram of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0034] Figure 4 An internal structure diagram of a rear shell unit of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0035] Figure 5 A structure diagram of a seed inlet door plate, a blocking plate, a linkage plate, and a seed cleaning door plate of a blocking type air suction seed metering device for precision seeding of a breeding plot are all in an open state is provided in the present application;

[0036] Figure 6 A structure diagram of a seed inlet door plate, a blocking plate, a linkage plate, and a seed cleaning door plate of a blocking type air suction seed metering device for precision seeding of a breeding plot are all in a closed state is provided in the present application;

[0037] Figure 7 A partial structure side cross-sectional view of a rear shell unit of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0038] Figure 8 A seed metering disc and rear shell connection diagram of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0039] Figure 9 A rear shell connection exploded view of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application;

[0040] Figure 10 A parallel four-bar mechanism and blocking plate and linkage plate connection diagram of a blocking type air suction seed metering device for precision seeding of a breeding plot is provided in the present application.

[0041] Reference signs:

[0042] 1, front housing unit; 2, rear housing unit; 3, seed dispensing unit; 4, execution unit; 5, monitoring system; 6, upper computer; 7, rotating door shaft; 8, front housing; 9, negative pressure pipeline joint; 10, sealing gasket; 11, pressing plate; 12, clamping pad; 13, limiting pad; 14, rear housing; 15, seed feeding door plate; 16, blocking plate; 17, blocking rotating shaft; 18, linkage plate; 19, linkage rotating shaft; 20, seed cleaning door plate; 21, seed cleaning rotating shaft; 22, first seed sliding plate; 23, second seed sliding plate; 24, automatic seed feeding pipe; 25, seed storage chamber; 26, seed storage chamber cover plate; 27, manual seed feeding hopper; 28, seed cleaning pipeline; 29, infrared counter fixing plate; 30, gear box; 31, gear shaft; 32, first bevel gear; 33, seed dispensing disc; 34, inner seed scraping plate; 35, outer seed scraping plate; 36, pointer; 37, limiting plate; 38, pointer fixing plate; 39, transmission shaft; 40, second bevel gear; 41, seed feeding cylinder; 42, blocking cylinder; 43, seed cleaning cylinder; 44, parallel four-bar mechanism; 45, connecting rod; 46, first Y-shaped connector; 47, second Y-shaped connector; 48, first camera; 49, second camera; 50, third camera; 51, fourth camera; 52, first infrared counter; 53, second infrared counter. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0044] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0045] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the present application.

[0046] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, and can also be communication; can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] In this application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0048] As shown in Figures 1 to 10 The application provides a blocking type air suction seed metering device for precision seeding of breeding plots, which comprises a front shell 8 unit 1, a rear shell 14 unit 2, a seed metering unit 3, an execution unit 4, a monitoring system 5 and a host computer 6. The front shell 8 unit 1 is hingedly connected to one end of the rear shell 14 unit 2, and the other end is detachably provided with a connecting piece to realize the opening and closing of the front shell 8 unit 1 relative to the rear shell 14 unit 2. The seed metering unit 3 is arranged in the rear shell 14 unit 2 and located between the front shell 8 unit 1 and the rear shell 14 unit 2. The execution unit 4 and the monitoring system 5 are arranged in the rear shell 14 unit 2. The execution unit 4 is connected with the front shell 8 unit 1 and the rear shell 14 unit 2 to drive the blocking type air suction seed metering device. The monitoring system 5 comprises a camera assembly and an infrared counter assembly to monitor the seed metering condition and the seed metering quantity inside the blocking type air suction seed metering device. The host computer 6 is connected with the execution unit 4 and the monitoring system 5 to record and process the monitoring information of the monitoring system 5 and transmit action information to the execution unit 4.

[0049] Wherein, as Figure 1As shown in the drawings, the front shell unit 1 and the rear shell unit 2 are respectively provided with connecting ears and through holes at both ends, the end provided with the connecting ear is rotatably connected through the door shaft 7, and the end provided with the through hole can be disassembled from the rear shell 14 unit 2, that is, the through hole can be inserted into the connecting piece, and the connecting piece can adopt a bolt structure to realize the opening and closing of the rear shell 14 unit 2 and the front shell 8 unit 1.

[0050] Further, as shown in the drawings, Figure 1 and Figure 2 The front shell 8 unit 1 includes a front shell 8, a negative pressure pipeline joint 9, a sealing gasket 10, a pressing plate 11, a clamping gasket 12 and a limiting gasket 13, the negative pressure pipeline joint 9 is arranged at the edge of the outer surface of the front shell 8, the pressing plate 11 is arranged on the inner surface of the front shell 8, the sealing gasket 10 is arranged between the pressing plate 11 and the front shell 8, the sealing gasket 10 is tightly connected with the front shell 8 to form a negative pressure cavity, the clamping gasket 12 is arranged on the side of the pressing plate 11 away from the sealing gasket 10, and the limiting gasket 13 is arranged on the outer surface of the front shell 8. The clamping gasket 12, the pressing plate 11 and the limiting gasket 13 are collinear with the center of the front shell 8.

[0051] As a preferred embodiment of the present application, as shown in the drawings, Figure 2 and Figure 3 The rear shell 14 unit 2 includes a rear shell 14, a seed feeding door plate 15, a blocking assembly, a seed feeding assembly and a gear set, the seed feeding door plate 15 is arranged between the seed feeding assembly and the inner side of the rear shell 14 to turn on and off the seed feeding, the blocking assembly is rotatably connected to the inner side of the rear shell 14 to block the excess seeds, the seed feeding assembly is arranged on the outer side of the rear shell 14 and communicates with the inside of the rear shell 14 to add seeds, and the gear set is arranged at the center position of the outer side of the rear shell 14 and is in transmission connection with the execution unit 4.

[0052] Specifically, as shown in the drawings, Figure 6 and Figure 7 The rear shell 14 unit 2 further includes a buffer area, a seed filling area and a seed cleaning area, which are arranged on the inner side of the rear shell 14, the buffer area and the seed filling area are respectively arranged on both sides of the seed feeding door plate 15, the seed cleaning area is arranged below the seed filling area, and the seed cleaning door plate 20 is arranged between the seed cleaning area and the seed filling area. The rear shell 14 unit 2 further includes a first seed sliding plate 22 and a second seed sliding plate 23, the first seed sliding plate 22 is arranged at the center position of the rear shell 14 unit 2 and is provided with an inclined surface with an angle of 37° with the horizontal plane, the second seed sliding plate 23 is arranged below the first seed sliding plate 22 and is connected with the bottom of the rear shell 14 through an infrared counter fixing plate 29, and the second seed sliding plate 23 is provided with an inclined surface with an angle of 30° with the horizontal plane and is connected with the seed cleaning area.

[0053] Further, the blocking assembly comprises a blocking plate 16 and a linkage plate 18, the blocking plate 16 and the linkage plate 18 are respectively hinged with the inner side wall of the rear shell 14 and the extension section of the first seed sliding plate 22, the blocking plate 16 and the linkage plate 18 are provided with a blocking pivot 17 and a linkage pivot 19 at the center of rotation, the extension section is arranged below the slope of the first seed sliding plate 22, and the side of the linkage plate 18 away from the blocking pivot 17 and the linkage pivot 19 can be in contact with the surface of the second seed sliding plate 23.

[0054] It should be noted that, as shown in Figure 4 , Figure 5 , Figure 6 and Figure 10 , the blocking plate 16 and the blocking pivot, the linkage plate 18 and the linkage pivot 19, and the seed cleaning door plate 20 and the seed cleaning pivot 21 are fixedly connected (welded), and each pivot rotates to drive the corresponding blocking plate 16, linkage plate 18, and seed cleaning door plate 20 to rotate. In addition, the blocking plate 16 and the linkage plate 18 are synchronous, and the two are connected with the blocking cylinder 42 through a parallelogram mechanism 44, which is further subdivided into a double-crank mechanism

[0055] As shown in FIGS. 5 and Figure 6 , the blocking plate 16 is fixedly connected with the blocking pivot 17, the linkage plate 18 is fixedly connected with the linkage pivot 19, the blocking pivot 17 and the linkage pivot 19 are both rotationally connected with the rear shell 14 through a through hole, the blocking plate 16 and the linkage plate 18 perform the same switching action, when the blocking plate 16 is opened, one side of the blocking plate 16 is tightly attached to the inner wall of the rear shell 14, and the bottom of the linkage plate 18 is tightly attached to the second seed sliding plate 23, when the blocking plate 16 is closed, the bottom of the blocking plate 16 is tightly attached to the second seed sliding plate 23, and the linkage plate 18 hovers above the second seed sliding plate 23; the seed cleaning door plate 20 is arranged at the junction of the seed filling area and the seed cleaning area, when the seed cleaning door plate 20 is closed, the bottom of the seed cleaning door plate 20 is tightly attached to the inner wall of the rear shell 14, the seed cleaning door plate 20 is fixedly connected with the seed cleaning pivot 21, and the seed cleaning pivot 21 is rotationally connected with the rear shell 14 through a through hole.

[0056] It can be understood that, in Figure 6 and Figure 7 , the buffer area, the seed filling area, and the seed cleaning area are identified by virtual frames to facilitate clear and intuitive observation of their positions, and the buffer area is located at the bottom of the seed storage chamber 25, the boundary between the buffer area and the seed filling area is the seed inlet door plate 15, when the seed inlet door plate 15 is opened, the seeds in the buffer area enter the seed filling area, when the seed inlet door plate 15 is closed, the seeds in the next small area enter the buffer area, and the cycle continues. The seed cleaning door plate 20 is at the bottom of the seed filling area, and the seed cleaning door plate 20 is the boundary between the seed filling area and the seed cleaning area, after sowing a small area, the seed cleaning door plate 20 is opened, the remaining seeds in the seed filling area enter the seed cleaning area and are sucked away by the seed cleaning pipeline 28.

[0057] As a preferred embodiment of the present application, as a preferred embodiment of the present application, the assembly includes an automatic seed feeding pipe, a seed storage chamber 25, a seed storage chamber 25 cover plate 26, a manual seed feeding bucket 27 and a seed cleaning pipe joint, the seed storage chamber 25 is arranged on the outside of the rear shell 14, the top of which is provided with a seed storage chamber 25 cover plate 26, the automatic seed feeding pipe is arranged on the top of the seed storage chamber 25 cover plate 26, the manual seed feeding bucket 27 is arranged above the seed filling area, and the seed cleaning pipe joint is connected to the seed cleaning area at one end and is provided with a seed cleaning pipe 28 at the other end.

[0058] That is, in use, the seeds are manually fed into the seed divider, and the divided seeds enter the buffer area through the automatic seed feeding pipe. Among them, the time control of feeding seeds into the seed divider is determined according to the seed storage pipe in the seed divider. After the seed storage pipe in the seed divider is lifted, the seeds of the last plot are evenly divided and completely discharged, and then after the seed storage pipe falls back, the seeds of the next plot can be fed into the seed divider. That is, the device of the present application needs to cooperate with the pre-arranged seed divider device to perform the seed dividing operation, and then the divided seeds are fed into the manual seed feeding bucket 27 for plot seed feeding.

[0059] In a preferred embodiment, as shown in Figures 4 to 9 The seed sowing unit 3 includes a seed sowing disc 33, an inner seed scraping plate 34, an outer seed scraping plate 35, a pointer 36, a limiting plate 37, a pointer 36 fixing plate 38, a transmission shaft 39 and a second bevel gear 40. The gear set includes a gear box 30, a gear shaft 31 and a first bevel gear 32. The seed sowing disc 33 is provided with a hexagonal hole in the center. One end of the transmission shaft 39 is connected to the hexagonal hole of the seed sowing disc 33, and the other end is connected to the second bevel gear 40. The second bevel gear 40 is engaged with the first bevel gear 32. The gear box 30 is arranged on the outside of the rear shell 14. The gear shaft 31 passes through the gear box 30 horizontally and is connected to the first bevel gear 32. The inner seed scraping plate 34 is arranged on the inside of the rear shell 14. The bottom of the outer seed scraping plate 35 is connected to the limiting plate 37. The limiting plate 37 is rotatably connected to the pointer 36. The pointer 36 is arranged in the pointer 36 fixing plate 38. The pointer 36 fixing plate 38 is arranged on the edge of the rear shell 14 unit 2 close to the front shell 8.

[0060] The inner and outer seed scraping plates 35 are responsible for scraping off the excess seeds. For example, if the sowing requirement is single-seed sowing, but three seeds are sucked by the suction hole, the middle seed is the normal sowing seed, and the seeds on both sides need to be scraped off. The inner seed scraping plate 34 is responsible for scraping off the excess seeds on the inner side, and the outer seed scraping plate 35 is responsible for scraping off the excess seeds on the outer side. The center of the seed metering plate 33 is provided with a hexagonal hole for connecting with the transmission shaft 39. The end of the transmission shaft 39 connected with the seed metering plate 33 is also hexagonal. Therefore, the rotation of the transmission shaft 39 drives the rotation of the seed metering plate 33, realizing the continuous sowing function. In addition, the round holes on the seed metering plate 33 are suction holes for sucking seeds (the process of filling seeds is that a suction hole sucks a seed). The long strip is called a seed disturbing groove, which is different from the suction hole. The seed disturbing groove does not need to be punched through, and it plays a role in disturbing the seed population in the filling seed area, which can improve the activity of the seed population in the filling seed area and facilitate the filling of seeds.

[0061] Further, as shown in Figure 4 、 Figure 8 and Figure 8 , the transmission shaft 39 and the second bevel gear 40 are fixedly connected by a key, which is to drive the transmission shaft 39 to rotate through the rotation of the second bevel gear 40. Specifically, the process of driving the seed metering plate 33 to rotate can be described as follows: under the action of external driving, the gear shaft 31 starts to rotate, the gear shaft 31 drives the first bevel gear 32 to rotate, the first bevel gear 32 and the second bevel gear 40 are in meshing transmission, so the second bevel gear 40 rotates under the driving of the first bevel gear 32, the second bevel gear 40 drives the transmission shaft 39 to rotate, and the transmission shaft 39 drives the seed metering plate 33 to rotate.

[0062] Preferably, the execution unit 4 includes a seed feeding cylinder 41, a blocking cylinder 42, a seed cleaning cylinder 43, a parallel four-bar mechanism 44, a connecting rod 45, a first Y-shaped connector 46, a second Y-shaped connector 47, the seed feeding cylinder 41 is arranged above the cover plate 26 of the seed storage chamber 25 and is connected with the seed feeding door plate 15 to drive the seed feeding door plate 15 to move vertically, one end of the blocking cylinder 42 is provided with the first Y-shaped connector 46, the other end is connected with the seed cleaning cylinder 43, the parallel four-bar mechanism is arranged at the first Y-shaped connector 46 and is connected with the linkage rotating shaft 19 and the blocking rotating shaft 17, the second Y-shaped connector 47 is arranged at the other end of the seed cleaning cylinder 43 and is connected with one end of the connecting rod 45, and the connecting rod 45 is rotationally connected with the seed cleaning rotating shaft 21.

[0063] In a specific embodiment, as shown in Figure 4 、 Figure 5 and Figure 10As shown, the seed feeding cylinder 41 is fixedly connected to the cover plate 26 of the seed storage chamber 25, and the piston rod of the seed feeding cylinder 41 is fixedly connected to the seed feeding door plate 15 to drive the seed feeding door to move up and down. The blocking cylinder 42 is rotatably connected to the rear shell 14 through a through hole in one end of the blocking cylinder 42 and a connecting shaft, and the piston rod of the blocking cylinder 42 is rotatably connected to the parallel four-bar mechanism 44 through a first Y-shaped connecting head 46. The parallel four-bar mechanism 44 is rotatably connected to the rear shell 14 through a rotating shaft, one end of the crank in the parallel four-bar mechanism 44 is rotatably connected to the blocking rotating shaft 17 through a through hole, and one end of the rocker in the parallel four-bar mechanism 44 is rotatably connected to the linkage rotating shaft 19 through a through hole. The seed cleaning cylinder 43 is rotatably connected to the rear shell 14 through a through hole in one end of the seed cleaning cylinder 43 and a connecting shaft, and the piston rod of the seed cleaning cylinder 43 is rotatably connected to the through hole in one end of the connecting rod 45 through a second Y-shaped connecting head 47. The through hole in the other end of the connecting rod 45 is rotatably connected to the seed cleaning rotating shaft 21. In addition, the blocking plate 16 and the linkage plate 18 move synchronously, and the two are connected to the blocking cylinder 42 through the parallel four-bar mechanism 44. The parallel four-bar mechanism 44 is further subdivided into a double-crank mechanism.

[0064] As a preferred embodiment of the present application, the camera assembly includes a first camera 48, a second camera 49, a third camera 50, and a fourth camera 51, all of which are arranged in the unit 2 of the rear shell 14. The rear shell 14 is provided with mounting holes for mounting the four cameras. The first camera 48 is arranged outside the seed storage chamber 25, the second camera 49 is arranged at the top of the rear shell 14 above the seed filling area, the third camera 50 is arranged on one side of the inner seed scraping plate 34 and the outer seed scraping plate 35, and the fourth camera 51 is arranged above the blocking plate 16 and the linkage plate 18 on the rear shell 14.

[0065] Specifically, the four cameras can be arranged on the rear shell 14, and the rear shell 14 is provided with through holes for placing the cameras. Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the first camera 48 is arranged outside the seed storage chamber 25 for monitoring the buffer area. The second camera 49 is arranged at the top of the rear shell 14 above the seed filling area for monitoring the seed filling area. The third camera 50 is arranged on the right side of the inner seed scraping plate 34 and the outer seed scraping plate 35 on the rear shell 14 at the same horizontal plane as the two, for monitoring the seed scraping effect of the inner and outer seed scraping plates 35. The fourth camera 51 is arranged above the blocking plate 16 and the linkage plate 18 on the rear shell 14, for monitoring the opening and closing states of the blocking plate 16 and the linkage plate 18. The cameras will not be affected by the seeds and the structures during recording.

[0066] Further, the infrared counter component includes a first infrared counter 52 and a second infrared counter 53, both of which are arranged in the rear housing 14 unit 2, and the first infrared counter 52 and the second infrared counter 53 are fixed on the infrared counter fixing plate 29 and are oppositely arranged.

[0067] Among them, the infrared counter is generally composed of two, one transmits a signal, and the other receives a signal; the infrared counter is usually composed of a counter, a photoelectric switch and a microcomputer control circuit. When the object passes through the counting area, it will block the infrared rays, thereby generating an electric pulse signal, and the upper computer 6 converts the signal into a digital signal and displays it. The infrared counter will generate an electric pulse signal every time a seed passes through the counting area. For example, 26 electric pulse signals are generated in a small area, indicating that 26 seeds are sown in this small area. After sowing in this small area, the upper computer 6 will store this data, and at the same time, the counting will be cleared, and the sowing quantity of the next small area will be recorded.

[0068] Furthermore, the upper computer 6 can use a computer to analyze and store data, so as to monitor and analyze the sowing partition of the seeds in real time, and the application can also be provided with an encoder, which can be programmed and controlled by existing software, such as single-chip microcomputer, PLC program, etc. In use, the seed metering device of the application can be installed on a walking tractor to perform long-distance seed metering, and an electronic encoder is installed on the ground wheel to identify the walking distance of the seeding machine, so as to identify the trigger signal according to the identified distance and the data set before work, so as to realize the automatic control connection between the seed feeding, seed filling, seed metering, seed blocking and seed cleaning, and the quick and residue-free switching between different small area varieties.

[0069] Specifically, in use, the seed metering device of the application can follow the following steps:

[0070] S1: The tractor is started, the upper computer 6 and the monitoring system 5 are started, the negative pressure cavity in the front housing 8 is filled with negative pressure, and the seed is prepared to be sucked; the tractor walking the small area seeding machine is provided with an automatic driving navigation capable of sending a trigger signal at a specified distance, and at the same time, the small area seeding machine starts to identify the distance of the seeding machine walking through the electronic encoder installed on the ground wheel; the first camera 48 monitors whether there is seed in the buffer area, if there is no seed, an alarm signal is sent and the machine is stopped for fault checking, if there is seed, the seeding machine continues to move forward; after the navigation sends the first trigger signal of the sown small area, the point is taken as the first small area sowing starting point, at this time, the piston rod of the cleaning cylinder 43 is extended, the cleaning door plate is closed, the piston rod of the feeding cylinder 41 is retracted, the feeding door plate 15 is opened, and the seed in the buffer area enters the seed filling area;

[0071] S2: The seeds in the filling area are sucked by the negative pressure at the suction hole, and the seed sowing process begins. The second camera 49 monitors whether the filling process is normal. If not, stop and check. If normal, the seeder continues to move forward. After the seed inlet door plate 15 is opened for a certain distance (the distance is set in the program of the upper computer 6), the piston rod in the seed inlet cylinder 41 extends, and the seed inlet door plate 15 closes. The first camera 48 monitors whether there are seeds remaining in the buffer area. If there are seeds, an alarm signal is sent and the machine stops to check for faults. If there are no seeds, the seeder continues to move forward, and the next plot of seeds to be sown enters the buffer area. The seeds pass through the inner and outer seed scraping plates 34 and 35 to scrape off excess seeds. The third camera 50 monitors whether the inner and outer seed scraping plates 34 and 35 can timely scrape off excess seeds. If not, stop and adjust the position of the outer seed scraping plate 35 through the pointer 36. If yes, the seeder continues to move forward, and the scraped seeds return to the filling area through the first seed return plate 22. The seeds are transported to the seed dropping port without negative pressure for dropping. The infrared counter starts recording the number of seeds discharged. During the rotation of the seed sowing disc 33, the inner disturbance groove always disturbs the seed population in the filling area, keeping the seed population active and ensuring better seed suction. The seed inlet door plate 15 is opened for a certain distance to prevent the seeds in the buffer area from not falling into the filling area in time, causing residue. If the seed inlet door plate 15 closes too quickly, the residual seeds will mix with the next plot of seeds.

[0072] S3: The seeder continues to move forward. When the navigation sends a second trigger signal, the cleaning area is filled with negative pressure to prepare to suck away the remaining seeds. The piston rod in the cleaning cylinder 43 is retracted, the cleaning door plate is opened, and the remaining seeds in the filling area are cleaned away under the action of cleaning negative pressure and gravity. At the same time, the upper computer 6 records the forward distance from the point of the second trigger signal as the starting point, and sends a command to the blocking cylinder 42 to close after a certain distance (the distance is set in the program of the upper computer 6);

[0073] S4: After the cleaning door plate is opened for a certain distance (the distance is set in the program of the upper computer 6), the piston rod of the cleaning cylinder 43 extends, the cleaning door plate closes, and the second camera 49 monitors whether there are seeds remaining in the filling area. If there are seeds, stop and check. If there are no seeds, the seeder continues to move forward. At the same time, the piston rod of the seed inlet cylinder 41 is retracted, the seed inlet door plate 15 is opened, the next plot of seeds to be sown in the buffer area enters the filling area, and the seeds in the filling area are sucked by the negative pressure at the suction hole, starting the seed sowing process.

[0074] S5: At this time, the seeder advances the distance described in S3, the blocking cylinder 42 piston rod is extended, the blocking plate 16 and the linkage plate 18 change from open to closed state, the excess seeds are blocked, and the seeds are prevented from being sown in the interval passage. The blocked seeds enter the seed cleaning area through the second seed cleaning plate 23. The fourth camera 51 monitors whether the opening and closing state of the blocking plate 16 and the linkage plate 18 is normal. If not, stop and check and repair. If normal, the seeder continues to advance. After the blocking plate 16 and the linkage plate 18 are closed for a distance, the infrared counter stops counting, transmits the sowing amount data of the current area to the upper computer 6 for recording, and clears the quantity at the same time, and starts counting the sowing amount of the next area;

[0075] S5: After the blocking plate 16 and the linkage plate 18 are closed for a distance, the blocking cylinder 42 piston rod is retracted, the blocking plate 16 and the linkage plate 18 change to the open state, and the seed metering device performs the next area seed sowing;

[0076] S6: Until the navigation sends the next area trigger signal, the upper computer 6 clears the distance traveled in the last area and starts recording the distance again. Then, according to the distance traveled by the seeder, the seed metering device performs various actions, and the cycle is repeated.

[0077] S7: During the whole process of sowing operation, when the cylinder piston rod cannot be extended or retracted to the position, the upper computer 6 will send an alarm signal and display the fault cylinder code or name. At this time, the machine needs to be stopped for maintenance and adjustment to prevent sowing disorder.

[0078] S8: After the machine is stopped for maintenance, the seeds to be sown that are cleaned out can be put into the seed filling area through the manual seed feeding hopper 27, and the area sowing operation continues.

[0079] Further, in order to facilitate the description of the scheme and application mode of the present application, the present application takes a specific distance length as an example to describe the working mode:

[0080] Taking the area length as 500 cm, the plant spacing as 20 cm, and the interval passage length as 100 cm as an example, according to the plant spacing and the interval passage length, there should be 5 plant spacings between the last plant of the previous area and the first plant of the next area, that is, there should be 4 empty plants. At this time, 4 empty suction holes should be set between the two areas of seeds to be sown on the seed metering disc 33.

[0081] S1: the tractor starts, the upper computer 6 and the monitoring system 5 start, the negative pressure cavity in the seed metering device front shell 8 is filled with negative pressure, and the seed is ready to be sucked; the tractor dragging the plot seeder is equipped with an automatic driving navigation capable of sending a trigger signal at a specified distance, and at the same time, the plot seeder starts to identify the distance of the seeder walking through the electronic encoder installed on the ground wheel; the first camera 48 monitors whether there is seed in the buffer area, if not, an alarm signal is sent and the machine is stopped for fault checking, if there is seed, the seeder continues to move forward; after the navigation sends the first trigger signal of the seeded plot, the point is taken as the first plot seeding starting point, at this time, the piston rod in the seed cleaning cylinder 43 is extended, the cleaning door plate is closed, the piston rod in the seed feeding cylinder 41 is retracted, the seed feeding door plate 15 is opened, and the seed in the buffer area enters the seed filling area;

[0082] S2: the seed in the seed filling area is sucked by the negative pressure at the suction hole, the seed metering process starts, the second camera 49 monitors whether the seed filling process is normal, if not, the machine is stopped for checking, if normal, the seeder continues to move forward; after the seed feeding door plate 15 is opened for 100 cm (the distance length is set in advance in the upper computer 6 running program), the piston rod in the seed feeding cylinder 41 is extended, and the seed feeding door plate 15 is closed; the first camera 48 monitors whether there is seed left in the buffer area, if there is seed, an alarm signal is sent and the machine is stopped for fault checking, if there is no seed, the seeder continues to move forward, and the next plot seed to be seeded enters the buffer area; the seed passes through the inner seed cleaning plate 34 and the outer seed cleaning plate 35 to scrape off the excess seed, the third camera 50 monitors whether the inner seed cleaning plate 34 and the outer seed cleaning plate 35 can timely scrape off the excess seed, if not, the machine is stopped to adjust the position of the outer seed cleaning plate 35 through the pointer 36, if yes, the seeder continues to move forward, and the scraped seed returns to the seed filling area through the first seed scraping plate 22; the adsorbed seed is transported to the seed dropping port without negative pressure for seed dropping, and the infrared counter starts to record the number of seeds discharged; during the rotation of the seed metering disc 33, the inner side of the seed disturbing groove always disturbs the seed population in the seed filling area, so that the seed population keeps an active state, and better seed sucking is ensured;

[0083] S3: the seeder continues to move forward, when the navigation sends the second trigger signal, the seed cleaning area is filled with negative pressure to prepare to suck away the remaining seed, the piston rod in the seed cleaning cylinder 43 is retracted, the cleaning door plate is opened, and the remaining seed in the seed filling area is cleaned away under the action of the seed cleaning negative pressure and gravity; at the same time, the upper computer 6 records the forward distance from the point of the second trigger signal as the starting point, and sends a command to the blocking cylinder 42 to close after 160 cm (the distance length is set in advance in the upper computer 6 running program);

[0084] S4: After the cleaning door plate is opened for 80 cm (the distance length is set in advance in the program running on the host computer 6), the cleaning cylinder 43 piston rod is extended, the cleaning door plate is closed, the second camera 49 monitors whether there are seeds remaining in the seed filling area, if there are seeds, the machine stops for inspection, if there are no seeds, the seeding machine continues to move forward; at the same time, the seed feeding cylinder 41 piston rod is retracted, the seed feeding door plate 15 is opened, the next small area of the seed to be sown in the buffer area enters the seed filling area, the seeds in the seed filling area are sucked by the negative pressure at the suction hole, and the seed sowing process starts;

[0085] S5: At this time, the seeding machine has moved forward by 160 cm in S3, the blocking cylinder 42 piston rod is extended, the blocking door plate 16 and the linkage plate 18 change from an open state to a closed state, the excess seeds are blocked, and the seeds are prevented from being sown in the aisle; the fourth camera 51 monitors whether the opening and closing states of the blocking door plate 16 and the linkage plate 18 are normal, if not, the machine stops for inspection and repair, if normal, the seeding machine continues to move forward; after the blocking door plate 16 and the linkage plate 18 are closed for 60 cm (the distance length is set in advance in the program running on the host computer 6), the infrared counter stops counting, the sowing amount data of the current small area is transmitted to the host computer 6 for recording, and the quantity is cleared at the same time, and the counting of the sowing amount of the next small area starts;

[0086] S5: After the blocking door plate 16 and the linkage plate 18 are closed for a distance (the distance length is set in advance in the program running on the host computer 6 according to the width of the required aisle), the blocking cylinder 42 piston rod is retracted, the blocking door plate 16 and the linkage plate 18 change to an open state, and the seed sowing machine starts to sow seeds in the next small area;

[0087] S6: Until the navigation sends a trigger signal for the next small area, the host computer 6 clears the distance traveled by the last small area and starts to record the distance again, and then performs various actions of the seed sowing machine according to the distance traveled by the seeding machine, and the process is repeated;

[0088] S7: During the whole process of the seeding operation, when the cylinder piston rod cannot be extended or retracted to the position, the host computer 6 will send an alarm signal and display the fault cylinder code or name, at this time, the machine needs to be stopped for maintenance and adjustment to prevent the seeding from being chaotic;

[0089] S8: After the machine is stopped for maintenance, the seeds to be sown that are cleaned out can be put into the seed filling area through the manual seed feeding bucket 27, and the small area seeding operation continues.

[0090] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0091] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the differences from other embodiments.

[0092] The above merely provides an example of the present application, but is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A blocking-type air-suction seed metering device for precision seeding in breeding plots, characterized in that, The blocking air suction seed metering device includes a front housing unit, a rear housing unit, a seed metering unit, an execution unit, a monitoring system, and a host computer. The front housing unit is hinged to one end of the rear housing unit, and the other end is detachably provided with a connector to realize the opening and closing of the front housing unit relative to the rear housing unit. The seed metering unit is disposed in the rear housing unit and located between the front housing unit and the rear housing unit. The execution unit and the monitoring system are disposed in the rear housing unit. The execution unit is connected to the front housing unit and the rear housing unit to drive the blocking air suction seed metering device to move. The monitoring system includes a camera component and an infrared counting component to monitor the seed metering situation and seed quantity inside the blocking air suction seed metering device. The host computer is connected to the execution unit and the monitoring system to record and process the monitoring information of the monitoring system and transmit action information to the execution unit. The rear housing unit includes a blocking component, a first seed feeding plate, and a second seed feeding plate. The blocking component is rotatably connected to the inner side of the rear housing to block excess seeds. The first seed feeding plate is located at the center of the rear housing unit and has an inclined surface at a 37° angle to the horizontal plane. The second seed feeding plate is located below the first seed feeding plate and is connected to the bottom of the rear housing via a counter fixing plate. The second seed feeding plate has an inclined surface at a 30° angle to the horizontal plane and is connected to the seed cleaning area. The blocking component includes a blocking plate and a linkage plate. The blocking plate and the linkage plate are respectively hinged to the inner sidewall of the rear housing and the extension section of the first seed feeding plate. A blocking shaft and a linkage shaft are located at the rotation center of the blocking plate and the linkage plate. The extension section is located below the inclined surface of the first seed feeding plate. The side of the linkage plate and the blocking plate away from the blocking shaft and the linkage shaft can contact the surface of the second seed feeding plate.

2. The blocking-type air suction seed metering device for precision seeding in breeding plots as described in claim 1, characterized in that, The front housing unit includes a front housing, a negative pressure pipe joint, a sealing gasket, a pressure plate, a clamping gasket, and a limiting gasket. The negative pressure pipe joint is located at the edge of the outer surface of the front housing. The pressure plate is located on the inner surface of the front housing. The sealing gasket is located between the pressure plate and the front housing. The clamping gasket is located on the side of the pressure plate away from the sealing gasket. The limiting gasket is located on the outer surface of the front housing. The clamping gasket, the pressure plate, and the limiting gasket are collinear with the center of the front housing.

3. The blocking-type air suction seed metering device for precision seeding in breeding plots as described in claim 2, characterized in that, The rear housing unit further includes a rear housing, a seed inlet gate, a seed inlet assembly, and a gear set. The seed inlet gate is disposed between the seed inlet assembly and the inner side of the rear housing to allow seed inlet to be switched on or off. The seed inlet assembly is disposed on the outer side of the rear housing and communicates with the interior of the rear housing to add seeds. The gear set is disposed at the center of the outer side of the rear housing and is connected to the execution unit for transmission.

4. The blocking-type air suction seed metering device for precision seeding in breeding plots as described in claim 3, characterized in that, The rear housing unit further includes a buffer area, a seed filling area, and a seed cleaning area, all of which are disposed inside the rear housing. The buffer area and the seed filling area are respectively disposed on both sides of the seed inlet door plate, and the seed cleaning area is disposed below the seed filling area. A seed cleaning door plate is disposed between the seed cleaning area and the seed filling area.

5. The blocking-type air-suction seed metering device for precision seeding in breeding plots as described in claim 4, characterized in that, The seed-feeding assembly includes an automatic seed-feeding pipe, a seed storage chamber, a seed storage chamber cover, a manual seed-feeding hopper, and a seed-cleaning pipe connector. The seed storage chamber is located on the outside of the rear housing, and the seed storage chamber cover is located on top of it. The automatic seed-feeding pipe is located on top of the seed storage chamber cover. The manual seed-feeding hopper is located above the seed filling area. One end of the seed-cleaning pipe connector is connected to the seed-cleaning area, and the other end is provided with a seed-cleaning pipe.

6. The blocking-type air-suction seed metering device for precision seeding in breeding plots as described in claim 5, characterized in that, The seed metering unit includes a seed metering disc, an inner seed scraper, an outer seed scraper, a pointer, a limiting plate, a pointer fixing plate, a drive shaft, and a second bevel gear. The gear set includes a gearbox, a gear shaft, and a first bevel gear. The seed metering disc has a hexagonal through hole at its center. One end of the drive shaft is connected to the hexagonal through hole of the seed metering disc, and the other end is connected to the second bevel gear. The second bevel gear meshes with the first bevel gear. The gearbox is located at the center of the outer side of the rear housing. The gear shaft passes laterally through the gearbox and is connected to the first bevel gear. The inner seed scraper is located on the inner side of the rear housing. The bottom of the outer seed scraper is connected to the limiting plate. The limiting plate is rotatably connected to the pointer. The pointer is located in the pointer fixing plate, which is located on the edge of the rear housing unit near the front housing.

7. The blocking-type air suction seed metering device for precision seeding in breeding plots as described in claim 6, characterized in that, The execution unit includes a seed-inlet cylinder, a blocking cylinder, a seed-cleaning cylinder, a parallel four-bar linkage, a connecting rod, a first Y-shaped connector, and a second Y-shaped connector. The seed-inlet cylinder is located above the seed storage chamber cover and is connected to the seed-inlet door, driving the seed-inlet door to move vertically. One end of the blocking cylinder is provided with the first Y-shaped connector, and the other end is connected to the seed-cleaning cylinder. The parallel four-bar linkage is located at the first Y-shaped connector and is connected to the linkage shaft and the blocking shaft. The second Y-shaped connector is located at the other end of the seed-cleaning cylinder and is connected to one end of the connecting rod. The connecting rod and the seed-cleaning shaft form a rotatable connection.

8. The blocking-type air suction seed metering device for precision seeding in breeding plots as described in claim 7, characterized in that, The camera assembly includes a first camera, a second camera, a third camera, and a fourth camera, all of which are disposed in the rear housing unit. The rear housing has mounting holes for mounting the four cameras. The first camera is disposed outside the seed storage room, the second camera is disposed on the top of the rear housing above the seed filling area, the third camera is disposed on one side of the inner and outer seed scraping plates, and the fourth camera is disposed on the rear housing above the blocking plate and the linkage plate.

9. A blocking-type air-suction seed metering device for precision seeding in breeding plots as described in claim 8, characterized in that, The infrared counting component includes an infrared counter fixing plate, a first infrared counter, and a second infrared counter. The infrared counter fixing plate is located below the seed inlet of the seed metering device and is fixedly connected to the bottom of the rear housing. The first infrared counter and the second infrared counter are located on the rear housing unit. The first infrared counter and the second infrared counter are fixed on the infrared counter fixing plate and are arranged opposite to each other.

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