A double-line wide-width seed metering device and working method thereof

Abstract

The invention discloses a double-line wide-width seeding device, comprising a housing, a seeding wheel group, a front stopper, a first adjustment arc plate, a second adjustment arc plate, a seeding tube, a first switch plug plate and a second switch plug plate, wherein an inner partition separates the inner cavity of the housing into two seeding cavities, and the front stopper is installed at the front of the top opening of the housing; the seeding wheel group comprises a first seeding wheel and a second seeding wheel which are coaxially arranged identically, and seeding plates are evenly distributed on the circumference of the outer cylindrical wall of the first seeding wheel; the seeding wheel group can be rotatably installed in an arc slot hole installed at the upper part of the housing, and the first adjustment arc plate and the second adjustment arc plate are respectively arranged at the lower part of the first seeding wheel and the second seeding wheel, and can adjust the seeding gap; the first switch plug plate and the second switch plug plate are arranged in a sliding groove opened at the top of the housing; and the two seeding cavities are respectively connected to independent seeding tubes. The double-line wide-width seeding device and the working method thereof of the invention have uniform seeding and are suitable for wide-width uniform sowing and planting.

Description

Technical Field

[0001] The invention relates to the technical field of seed metering devices, and in particular to a double-line wide-width seed metering device and a working method thereof. Background Art

[0002] The wide-width uniform sowing technology for wheat is a high-yield planting technology that combines agricultural machinery and agronomy to change from intensive strip sowing to wide-width precision sowing. This technology expands the sowing width of wheat from the traditional 3-5 cm to 7-8 cm, and increases the row spacing from the traditional small row spacing of 15-20 cm to a wide row spacing of 22-26 cm. Since the wide-width sowing grains are evenly dispersed, the nutritional area of ​​a single wheat plant is expanded, which is conducive to the development of the plant's root system and the robustness of the wheat seedlings, and improves the plant's cold resistance and stress resistance, with a significant yield-increasing effect. The wider row spacing is also conducive to mechanical topdressing and spraying, saving labor and time, and improving labor productivity.

[0003] However, most of the existing seeders are strip seeding machines or narrow-width seeding machines, which have low working efficiency and are difficult to adapt to the needs of wide-width wheat sowing over a large area. With the promotion of wide-width uniform sowing technology, corresponding equipment for wide-width sowing has also been produced, such as a wide-width precision wheat seeder with announcement number CN201178573Y. The technical solution is to provide two parallel and front-to-back arranged seeding shafts at the bottom of the seed box, and 6 seeding device units are evenly arranged on the seeding shaft in the horizontal direction. Each seeding device unit is composed of two hole-type seeding devices arranged in a staggered manner in front and back. The driving sprocket on one side of the ground wheel is connected to the front shaft sprocket and the rear shaft sprocket on the seeding shaft through a chain. The hole-type seeding device is used to improve the uniformity of seeding and sowing accuracy, and 12 seeding devices are used for 6-row wheat sowing, and the sowing width of the seeding device reaches about 80mm. It can be seen that the patented technical solution uses front and rear staggered seeders and increases the number of hole rows of the hole-type seeders to achieve wide-width sowing. However, the staggered setting makes the seeding device entrance inconsistent, especially when there are fewer seeds in the seed bin, the seeding is not uniform. At the same time, the hole-type seeder needs to be used with a brush, and it is easy to leak seeds when the brush is deformed.

[0004] Therefore, it is necessary to develop a double-line wide-width seed metering device and a working method thereof to overcome the above-mentioned defects. Summary of the invention

[0005] The object of the present invention is to provide a double-line wide-width seeding device, which arranges two side-by-side paddle-type seeding wheels and respectively seeding through independent seeding tubes, so that the seeds are evenly seeded and suitable for wide-width uniform planting.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses a double-line wide-width seeding device, comprising a housing, a seeding wheel group, a front stopper, a first adjustment arc plate, a second adjustment arc plate, a seeding tube, a first switch plug plate and a second switch plug plate, wherein an inner partition is arranged in the housing and its inner cavity is separated into two seeding cavities, and the front stopper is detachably mounted on the front part of the top opening of the housing; the seeding wheel group comprises a first seeding wheel and a second seeding wheel which are coaxially arranged, and seeding pieces are evenly distributed on the circumference of the outer cylindrical wall of the first seeding wheel, and the second seeding wheel has the same structure as the first seeding wheel; the seeding wheel group is rotatably mounted in an arc slot hole mounted on the upper part of the housing, the first seeding wheel and the second seeding wheel are respectively located in the two seeding cavities, the first adjustment arc plate and the second adjustment arc plate are respectively arranged at the lower part of the first seeding wheel and the second seeding wheel, and can adjust the seeding gap; the first switch plug plate and the second switch plug plate are arranged in the open slide groove at the top of the housing and can respectively close and open the seed inlet above the first seeding wheel and the second seeding wheel; the two seeding cavities are respectively connected to the independent seeding tubes for seeding.

[0008] Furthermore, the shell includes a main shell and a sub-shell, and both the main shell and the sub-shell are right-angled triangular shells with convex arc hypotenuses in longitudinal cross-section and are detachably connected side by side, and the inner partition of the main shell is the inner side plate.

[0009] Furthermore, the paddles on the first seeding wheel are arranged in two rows, and the paddles in the two rows are staggered.

[0010] Furthermore, the inner end of the paddle is provided with a chamfer.

[0011] Furthermore, the seeding wheel group also includes an intermediate seeding wheel, which is coaxially superimposed between the first seeding wheel and the second seeding wheel, the paddle height of the intermediate seeding wheel is smaller than the paddle height of the first seeding wheel, and the width of the intermediate seeding wheel is smaller than the first seeding wheel; a plug-in partition plate extending backward is provided on the rear side wall of the front stopper, and the rear end of the plug-in partition plate is inserted into the spacing groove between the first seeding wheel and the intermediate seeding wheel, the plug-in partition plate is parallel to the inner partition plate, and the first adjustment arc plate can also adjust the seeding gap with the intermediate seeding wheel.

[0012] Furthermore, it also includes a third switch plug plate, which is arranged side by side between the first switch plug plate and the second switch plug plate, and the third switch plug plate closes and opens the seed inlet of the middle seeding wheel.

[0013] Furthermore, the paddles on the middle seeding wheel are arranged in two rows and are evenly distributed around the circumference, and the paddles in the two rows are staggered.

[0014] Furthermore, an upper baffle is provided on the upward concave arc surface of the first adjustment arc plate, and the upper baffle assists the inserting plate in separating the seeding channels of the middle seeding wheel and the first seeding wheel.

[0015] Furthermore, it also includes an outer guard plate, the opening of the arc slot hole installed on the upper part of the shell is facing rearward, and the outer guard plate blocks the opening.

[0016] The present invention also discloses a working method of a double-line wide-width seed metering device, which utilizes any of the double-line wide-width seed metering devices described above to perform double-wheel and double-line seeding simultaneously.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The present invention discloses a double-line wide-width seeding device. By arranging a first seeding wheel and a second seeding wheel side by side for independent seeding, the mutual influence between the two can be reduced. The same driving long shaft is used for driving, so that the first seeding wheel and the second seeding wheel are ensured to rotate synchronously for seeding. The first seeding wheel and the second seeding wheel both adopt a paddle-type seeding wheel, and cooperate with a first adjustment arc plate and a second adjustment arc plate for seeding. Brushes are no longer used, the structure is stable, and the seeding is uniform and reliable. The double-line wide-width seeding device of the present invention is provided with two paddle-type seeding wheels arranged side by side, and seeds are respectively planted through independent seeding tubes, so the seeds are planted uniformly, and it is suitable for wide-width uniform planting.

[0019] In addition, by setting the housing in a split form, it is easy to process and manufacture, and can be disassembled for more thorough cleaning and maintenance. By arranging two rows of staggered paddles on the outer cylindrical wall of the seeding wheel, the seeds can be continuously discharged, and the uneven discharge of seeds caused by pulse seeding can be improved compared with the through-length paddles. By arranging chamfers at the inner ends of the two rows of paddles, the scratch damage to the seeds by sharp edges can be reduced. Through the setting of the middle seeding wheel, the small paddles on the middle seeding wheel are suitable for the sowing of small-grain crops. When wide-width sowing is not performed, the first switch plug plate and the second switch plug plate are closed, and the sowing of small-grain crops can be achieved, that is, one machine with multiple functions can be achieved; at the same time, the setting of the middle seeding wheel can also play the role of spacing the first seeding wheel and the second seeding wheel, reducing the mutual interference between the seed inlets of the two seeding wheels. Through the setting of the third switch plug plate, the seed inlet of the middle seeding wheel can be closed when performing wide-width uniform sowing operations. By arranging an upper block plate on the upward concave arc surface of the first adjustment arc plate, two adjacent seeding channels can be isolated while adjusting the seeding gap to avoid the occurrence of cross-seeding. The outer guard plate can not only effectively protect the sowing wheel group, but also block the seeds in the sowing channel to prevent them from jumping out. It is made of transparent plastic plate material, which is convenient for observing the sowing situation and troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the double-line wide-width seed metering device of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the double-line wide-width seed metering device of the present invention from another angle;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention after removing the auxiliary housing;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention after removing the switch plug plate;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention after removing the switch plug board and the main housing;

[0026] Figure 6 It is a schematic diagram of the seeding channel when the double-line wide-width seed metering device of the present invention is used.

[0027] Explanation of the reference numerals: 1. main shell; 101. first through hole; 102. inner partition; 103. first latch; 104. screw seat; 2. sub-shell; 201. second through hole; 202. second latch; 3. seeding wheel group; 301. first seeding wheel; 302. second seeding wheel; 303. middle seeding wheel; 4. front stopper; 401. partition; 5. first adjustment arc plate; 501. upper stopper; 6. second adjustment arc plate; 7. lower seed tube; 701. anti-slip pattern; 8. first switch plug plate; 9. second switch plug plate; 10. third switch plug plate; 11. outer guard plate. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide a double-line wide-width seeding device and a working method thereof. By arranging two side-by-side paddle-type seeding wheels and respectively seeding through independent seeding tubes, the seeds are evenly seeded and suitable for wide-width uniform planting.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] With reference to the accompanying drawings, Figure 1 It is a schematic diagram of the three-dimensional structure of the double-line wide-width seed metering device of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the double-line wide-width seed metering device of the present invention from another angle; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention after removing the auxiliary housing; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention after removing the switch plug plate; Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention after removing the switch plug board and the main housing; Figure 6 It is a schematic diagram of the seeding channel when the double-line wide-width seed metering device of the present invention is used.

[0032] In a specific embodiment, Figures 1 to 6As shown, a double-line wide-width seeding device of the present invention includes a shell, a seeding wheel group 3, a front stopper 4, a first adjustment arc plate 5, a second adjustment arc plate 6, a seeding tube 7, a first switch plug plate 8 and a second switch plug plate 9, all of which are made of plastic material. An inner partition 102 is arranged in the shell, and its inner cavity is separated into two independent seeding cavities side by side. The front stopper 4 is detachably installed in the front part of the top opening of the shell by plug-in, and the front stopper 4 blocks the front of the seeding channel. The seeding wheel group 3 includes a first seeding wheel 301 and a second seeding wheel 302 arranged coaxially. The outer cylindrical wall of the first seeding wheel 301 is evenly distributed with seeding pieces. The second seeding wheel 302 has the same structure as the first seeding wheel 301. The seeding wheel group 3 can be rotatably installed in the arc slot hole on the upper part of the shell. The central axis hole of the seeding wheel group 3 is a prismatic hole for easy insertion of the driving long axis. The first sowing wheel 301 and the second sowing wheel 302 are respectively located in two independent seeding cavities, and the first adjustment arc plate 5 and the second adjustment arc plate 6 are respectively arranged at the lower part of the first sowing wheel 301 and the second sowing wheel 302. The head of the first adjustment arc plate 5 is a circular sleeve and the tail is a circular arc strip plate, and the circular sleeve is penetrated with a prism pin, and the two ends of the prism pin respectively extend out of the first through hole 101 and the second through hole 201 on the side plate of the shell. The circular arc strip plate is arranged below the first sowing wheel 301 and can adjust the seeding gap. The first switch plug plate 8 and the second switch plug plate 9 are arranged in the open slide groove at the top of the shell and can respectively close and open the seed inlet above the first sowing wheel 301 and the second sowing wheel 302. The two seeding cavities are respectively connected to two independent seeding tubes 7 for seeding. The tops of the two seeding tubes 7 are integrated with a surrounding edge, and the surrounding edge is connected to the outer wall of the seeding port of the shell through a plastic pin shaft. The outer wall of the bottom of the seeding tube 7 is provided with an anti-slip pattern 701, which is convenient for connecting the seeding corrugated tube.

[0033] By arranging the first seeding wheel 301 and the second seeding wheel 302 side by side for independent sowing, the mutual influence between the two can be reduced, and the same driving long shaft is used for driving, which ensures that the first seeding wheel 301 and the second seeding wheel 302 rotate synchronously for sowing; the first seeding wheel 301 and the second seeding wheel 302 both use paddle-type seeding wheels, cooperate with the first adjustment arc plate 5 and the second adjustment arc plate 6 for sowing, and no longer use brushes, the structure is stable, and the sowing is uniform and reliable. The double-line wide-width seeding device of the present invention arranges two paddle-type seeding wheels side by side, and sows through independent seeding tubes respectively, so the sowing is uniform, and it is suitable for wide-width uniform sowing and planting.

[0034] In a specific embodiment of the present invention, Figure 1 and Figure 2As shown, the housing includes a main housing 1 and a sub-housing 2. Both the main housing 1 and the sub-housing 2 are right-angled triangular housings with convex arc hypotenuses in longitudinal cross-section, and the two are detachably connected side by side. A plurality of screw seats 104 are provided on the outer contour of the main housing 1, and a screw through-hole plate is correspondingly provided on the outer contour of the sub-housing 2, and the two are connected by screws. The inner partition 102 of the main housing 1 is the inner side plate.

[0035] The shell is arranged in a split form, which is convenient for processing and manufacturing, and can be disassembled for more thorough cleaning and maintenance.

[0036] In a specific embodiment of the present invention, Figures 4 to 6 As shown, there are two rows of paddles on the first seeding wheel 301, and the two rows of paddles are staggered. That is, the two rows of paddles are staggered at a certain angle, and any paddle of the second row is located in the middle of two adjacent paddles in the first row. The second seeding wheel 302 has the same structure as the first seeding wheel 301.

[0037] Specifically, if Figure 4 and Figure 5 As shown, the inner ends of the two rows of paddles facing each other are chamfered.

[0038] By arranging two rows of staggered paddles on the outer cylindrical wall of the seeding wheel, continuous seeding can be achieved, which can improve the uneven discharge of seeds caused by pulse seeding compared with the full-length paddles. By arranging chamfers at the inner ends of the two rows of paddles, scratches and damage to seeds caused by sharp edges can be reduced.

[0039] In a specific embodiment of the present invention, Figures 3 to 6 As shown, the seeding wheel group 3 also includes an intermediate seeding wheel 303, which is coaxially superimposed between the first seeding wheel 301 and the second seeding wheel 302, the paddle height of the intermediate seeding wheel 303 is smaller than the paddle height of the first seeding wheel 301, and the width of the intermediate seeding wheel 303 is smaller than the first seeding wheel 301. A plug-in partition plate 401 extending backward is provided on the rear side wall of the front stopper 4, the rear end of the plug-in partition plate 401 is inserted into the spacing groove between the first seeding wheel 301 and the intermediate seeding wheel 303, the inner partition plate 102 is inserted into the spacing groove between the intermediate seeding wheel 303 and the second seeding wheel 302, and the plug-in partition plate 401 is parallel to the inner partition plate 102. The first adjustment arc plate 5 can also adjust the seeding gap between the intermediate seeding wheel 303.

[0040] Specifically, if Figures 1 to 3 As shown, the double-line wide-width seed metering device of the present invention further includes a third switch plug plate 10, which is arranged side by side between the first switch plug plate 8 and the second switch plug plate 9, and the third switch plug plate 10 closes and opens the seed inlet of the middle seeding wheel 303.

[0041] Specifically, a plurality of continuous positioning grooves are provided at the bottom of the first switch plug plate 8 and the second switch plug plate 9, and a first clamping protrusion 103 and a second clamping protrusion 202 are provided at the top of the rear frame of the top opening of the main housing 1 and the auxiliary housing 2. The opening size of the first switch plug plate 8 and the second switch plug plate 9 can be adjusted by the cooperation of the positioning grooves and the clamping protrusions.

[0042] Specifically, if Figure 5 As shown, the paddles on the middle seeding wheel 303 are arranged in two rows and are evenly distributed around the circumference, and the two rows of paddles are staggered.

[0043] Specifically, if Figure 5 As shown, an upper baffle 501 is arranged on the upward concave arc surface of the first adjustment arc plate 5, and the upper baffle 501 assists the inserting partition plate 401 to separate the seeding channel of the middle seeding wheel 303 and the first seeding wheel 301. The upper baffle 501 is closely attached to the side wall of the inserting partition plate 401 facing the middle seeding wheel 303.

[0044] By setting the middle sowing wheel 303, the small paddle on the middle sowing wheel 303 is suitable for sowing small-grain crops. When wide-width sowing is not performed, the first switch plug plate 8 and the second switch plug plate 9 are closed, sowing small-grain crops can be achieved, that is, one machine with multiple functions can be achieved; at the same time, the setting of the middle sowing wheel 303 can also play the role of spacing the first sowing wheel 301 and the second sowing wheel 302, reducing the mutual interference between the seed inlets of the two sowing wheels. By setting the third switch plug plate 10, the seed inlet of the middle sowing wheel 303 can be closed when performing wide-width uniform sowing operations. By setting the upper baffle 501 on the upward concave arc surface of the first adjustment arc plate 5, two adjacent sowing channels can be isolated while adjusting the sowing gap to avoid the occurrence of cross-seeding.

[0045] A large amount of practical experience proves that the double-line wide-width seeding device of the present invention is suitable for sowing about 20 kinds of crops, including barley, wheat, sorghum, millet, rapeseed, alfalfa, sesame, buckwheat, soybean, mung bean, red bean, etc. At the same time, the double-line wide-width seeding device of the present invention can also be used as a sowing device for medicinal seeds.

[0046] In a specific embodiment of the present invention, Figures 2 to 6 As shown, the double-line wide-width seed metering device of the present invention further includes an outer guard plate 11. The opening of the arc slot hole installed on the upper part of the shell faces backward, and the outer guard plate 11 blocks the opening. The outer guard plate 11 is made of a transparent plastic plate material and is installed and blocked by a bottom pin shaft connected to a top clamping method.

[0047] The outer guard plate 11 can not only effectively protect the sowing wheel group 3, but also block the seeds in the seeding channel to prevent them from jumping out. It is made of transparent plastic plate material, which is convenient for observing the seeding situation and troubleshooting.

[0048] When the double-line wide-width seeding device of the present invention performs wide-width uniform sowing operation, Figure 6 As shown, the double-line wide-width seeding device of the present invention is installed on the bottom plate of the seed bin of the seeding machine and the seed inlet faces obliquely upward. The third switch plug plate 10 completely closes the seed inlet of the middle seeding wheel 303, and the first switch plug plate 8 and the second switch plug plate 9 open the seed inlet of the same length. The driving mechanism of the seeding machine drives the long axis of the prism to rotate, and the long axis drives the seeding wheel group 3 to rotate counterclockwise. When the first seeding wheel 301 rotates, the paddle on it drives the crop seeds to be transported downward, because the distance between the tail plate of the first adjustment arc plate 5 and the outer cylindrical surface of the first seeding wheel 301 is limited to the height of one seed, so that only one seed passes through the narrow and long channel under the paddle, enters the seeding port below, and then enters the seeding tube 7, and enters the wide-width building corner or disc through the corrugated pipe. Similarly, the second seeding wheel 302 rotates synchronously, and the seeds are seeded through another seeding tube 7 and the corrugated pipe arranged side by side. The real double-line seeding is more uniform, and the increase in production and income is achieved to the maximum extent. When sowing various small-grain crops such as carrots, cabbages, alfalfa, etc., the first switch plug plate 8 and the second switch plug plate 9 can be completely closed, and the third switch plug plate 10 can be opened to carry out sowing operations.

[0049] The double-line wide-width seeding device of the present invention can reduce the mutual influence between the two by arranging the first seeding wheel 301 and the second seeding wheel 302 side by side for independent seeding, and adopts the same driving long shaft for driving, so as to ensure that the first seeding wheel 301 and the second seeding wheel 302 rotate synchronously for seeding; the first seeding wheel 301 and the second seeding wheel 302 both adopt the paddle-type seeding wheel, cooperate with the first adjustment arc plate 5 and the second adjustment arc plate 6 for seeding, and no longer use the brush, so the structure is stable, and the seeding is uniform and reliable. The double-line wide-width seeding device of the present invention arranges two paddle-type seeding wheels side by side, and the seeds are respectively arranged through independent seeding tubes, so the seeds are arranged uniformly, and it is suitable for wide-width uniform planting. In addition, by arranging the shell in a split form, it is convenient for processing and manufacturing, and can be disassembled for more thorough cleaning and maintenance. By arranging two rows of displaced paddles on the outer cylindrical wall of the seeding wheel, the seeds can be continuously discharged, and compared with the through-length paddles, the uneven discharge of seeds caused by pulse-type seeding can be improved. By setting chamfers at the inner ends of the two rows of paddles, the scratch damage to seeds caused by sharp edges can be reduced. Through the setting of the middle sowing wheel 303, the small paddles on the middle sowing wheel 303 are suitable for sowing small-particle crops. When wide-width sowing is not performed, the first switch plug plate 8 and the second switch plug plate 9 are closed, so that small-particle crops can be sown, that is, one machine with multiple functions can be realized; at the same time, the setting of the middle sowing wheel 303 can also play the role of spacing the first sowing wheel 301 and the second sowing wheel 302, reducing the mutual interference between the seed inlets of the two sowing wheels. Through the setting of the third switch plug plate 10, the seed inlet of the middle sowing wheel 303 can be closed when performing wide-width uniform sowing operations. By setting the upper baffle 501 on the upward concave arc surface of the first adjustment arc plate 5, two adjacent sowing channels can be isolated while adjusting the sowing gap to avoid the occurrence of stringing. The setting of the outer guard plate 11 can not only effectively protect the sowing wheel group 3, but also block the seeds in the sowing channel to prevent them from jumping out. Made of transparent plastic plate material, it is easy to observe the situation and troubleshoot.

[0050] The present invention also discloses a working method of a double-line wide-width seed metering device, which utilizes the double-line wide-width seed metering device described in any of the above specific implementations to perform double-wheel and double-line simultaneous seeding.

[0051] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A double-line wide-width seed metering device, characterized in that: The invention comprises a shell, a seeding wheel group (3), a front stopper (4), a first adjustment arc plate (5), a second adjustment arc plate (6), a lower seeding tube (7), a first switch plug plate (8) and a second switch plug plate (9); an inner partition plate (102) is arranged in the shell and its inner cavity is separated into two seeding cavities; the front stopper (4) is detachably mounted on the front part of the top opening of the shell; the seeding wheel group (3) comprises a first seeding wheel (301) and a second seeding wheel (302) which are coaxially arranged; seeding plates are evenly distributed on the circumference of the outer cylindrical wall of the first seeding wheel (301); the second seeding wheel (302) has the same structure as the first seeding wheel (301); the seeding wheel group ( 3) can be rotatably mounted in the arc slot hole on the upper part of the shell, the first seeding wheel (301) and the second seeding wheel (302) are respectively located in the two seeding cavities, the first adjustment arc plate (5) and the second adjustment arc plate (6) are respectively arranged at the lower part of the first seeding wheel (301) and the second seeding wheel (302), and can adjust the seeding gap; the first switch plug plate (8) and the second switch plug plate (9) are arranged in the open slide groove at the top of the shell and can respectively close and open the seed inlet above the first seeding wheel (301) and the second seeding wheel (302); the two seeding cavities are respectively connected to the independent seeding tube (7) for seeding; The shell comprises a main shell (1) and a secondary shell (2); the main shell (1) and the secondary shell (2) are both right-angled triangular shells with convex arc hypotenuses in longitudinal cross-section, and the two are detachably connected side by side; the inner partition plate (102) of the main shell (1) is the inner side plate.

2. The double-line wide-width seed metering device according to claim 1, characterized in that: There are two rows of paddles on the first seeding wheel (301), and the paddles in the two rows are staggered.

3. The double-line wide-width seed metering device according to claim 2, characterized in that: The inner end of the paddle is provided with a chamfer.

4. The double-line wide-width seed metering device according to any one of claims 1 to 3, characterized in that: The seeding wheel group (3) further comprises an intermediate seeding wheel (303), wherein the intermediate seeding wheel (303) is coaxially superimposed between the first seeding wheel (301) and the second seeding wheel (302), wherein the paddle height of the intermediate seeding wheel (303) is smaller than the paddle height of the first seeding wheel (301), and the width of the intermediate seeding wheel (303) is smaller than the first seeding wheel (301); a partition plate (401) extending backward is arranged on the rear side wall of the front stopper (4), wherein the rear end of the partition plate (401) is inserted into the spacing groove between the first seeding wheel (301) and the intermediate seeding wheel (303), wherein the partition plate (401) is parallel to the inner partition plate (102), and the first adjustment arc plate (5) can also adjust the seeding gap between the intermediate seeding wheel (303).

5. The double-line wide-width seed metering device according to claim 4, characterized in that: It also includes a third switch plug plate (10), which is arranged side by side between the first switch plug plate (8) and the second switch plug plate (9), and the third switch plug plate (10) closes and opens the seed inlet of the intermediate sowing wheel (303).

6. The double-line wide-width seed metering device according to claim 4, characterized in that: The paddles on the middle seeding wheel (303) are arranged in two rows and are evenly distributed around the circumference, and the paddles in the two rows are staggered.

7. The double-line wide-width seed metering device according to claim 5 or 6, characterized in that: An upper baffle (501) is provided on the upward concave arc surface of the first adjustment arc plate (5), and the upper baffle (501) assists the inserting partition plate (401) in spacing the seeding channels of the intermediate seeding wheel (303) and the first seeding wheel (301).

8. The double-line wide-width seed metering device according to claim 1, characterized in that: It also includes an outer guard plate (11), the opening of the arc slot hole installed on the upper part of the shell is facing rearward, and the outer guard plate (11) blocks the opening.

9. A working method of a double-line wide-width seed metering device, characterized in that: The double-line wide width seed metering device described in any one of claims 1 to 8 is used to carry out double-wheel double-line simultaneous seeding.

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