A film laying device for agricultural planting

Abstract

The present invention discloses a film-laying device for agricultural planting, which belongs to the field of planting technology and includes a soil-lifting device, a seed-metering device, a film-covering device, a suspension frame, and a power transmission device. The power transmission device is arranged on the upper side of the suspension frame, and the soil-lifting device, the seed-metering device, and the film-covering device are arranged in a linear array on the lower side of the suspension frame. The film-covering device is located between the seed-metering device and the soil-lifting device. The present invention uses a tractor to pull the suspension frame in front to drive the machine forward and drive the power transmission device to operate, thereby driving the soil-lifting device to open a groove on the soil surface, and the film-covering device covers the soil with the grooved soil with a film. The soil-lifting device covers the excess soil on the front side to both sides of the groove covered with a water-permeable film, and the water-permeable film is broken by the seed-metering device to plant seeds in the groove. After that, the covering wheel performs a covering operation to cover the soil and cover the ground film again.

Description

Technical Field

[0001] The invention belongs to the field of planting technology, and in particular relates to a film laying device for agricultural planting. Background Art

[0002] Film mulching is a key technical measure for developing dryland agriculture and conserving water, while also protecting the environment. Dryland agriculture relies on natural rainfall in the absence of irrigation. Film mulching can conserve moisture and water, improve soil physical properties, and increase crop yields. The Shanxi Academy of Agricultural Sciences has successfully developed "permeable mulch" and a "VVV planting model," opening up new opportunities for film-covered seeding.

[0003] Permeable mulch film is a permeable mulch film with a local double-layer micron-level linear pore structure. The "VVV planting mode" is to use agricultural machinery to scrape off the surface dry soil and sow seeds into the wet soil during sowing. After sowing, a V-shaped planting ditch is formed on the ground. For this V-shaped sowing ditch, it is a miniature sunlight-permeable greenhouse with fast seedling emergence and no seedling burn. It can gather trace precipitation to the roots of the seedlings, creating a relatively good micro-ecological environment of water, fertilizer, air and heat, solving the problem of water shortage and drought of dryland crops, and significantly increasing production. In order to promote new planting techniques and planting models, corresponding film-laying devices for agricultural planting are needed. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a film laying device for agricultural planting, which effectively solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a film laying device for agricultural planting, including a soil lifting device, a seed metering device, a film covering device, a suspension frame and a power transmission device, the power transmission device is arranged on the upper side of the suspension frame, the soil lifting device, the seed metering device and the film covering device are linearly arrayed on the lower side of the suspension frame, and the film covering device is located between the seed metering device and the soil lifting device; the soil lifting device includes a soil lifting box and a soil lifting chain, the soil lifting chain rotates in the soil lifting box, the front end of the soil lifting box is provided with a soil gathering trough, the rear end of the soil lifting box is provided with a soil discharge trough, a soil dividing plate is provided in the soil discharge trough, a support plate is provided in the middle of the soil lifting box, the support plate is provided on the suspension frame, and transmission rod fixing seats are provided on both sides of the rear wall of the soil discharge trough.

[0006] Preferably, the loosening rod on the front side of the hanging frame breaks the soil, and the soil collecting trough of the soil lifting box opens a ditch on the farmland. The excess soil is transferred to the soil discharge chute by the soil lifting chain. As the machine moves forward, the permeable membrane at the rear is covered with soil, and the permeable membrane on the film hanging rod is continuously pulled out and covered on the ditch. At the same time, the soil in the soil discharge chute falls to the ground after the film is covered through the soil dividing plate, and preliminary soil covering is carried out on both sides of the ditch to form a ridge slope, which is conducive to the collection of rainwater.

[0007] Furthermore, the seed metering device includes a seed storage box, a seed sorting box and a seed sorting turntable. The seed storage box is arranged above the seed sorting box, the seed sorting turntable rotates in the seed sorting box, and the seed sorting box is arranged on the rear wall of the soil discharge trough.

[0008] Furthermore, a feed pipe is provided above the seed box, a discharge pipe is provided below the seed box, a brush is provided inside the seed box, the brush is located at the lower side of the feed pipe, the brush slides on the side wall of the seeding turntable, the seed storage box is connected to the feed pipe, a seed groove is provided at the edge of the seeding turntable, and a shift rod is provided on both sides of the center of the seeding turntable, the shift rod is located outside the seeding box, and a transmission wheel is provided outside the shift rod.

[0009] Furthermore, the seed metering device also includes a seed pressing shaft sleeve and a seed pressing shaft. The seed pressing shaft sleeve is arranged on the discharge pipe, the seed pressing shaft sleeve is connected to the discharge pipe, and the seed pressing shaft slides in the seed pressing shaft sleeve. A spring air cavity is formed between the top end of the seed pressing shaft sleeve and the upper end of the seed pressing shaft.

[0010] Furthermore, positioning grooves are provided on both sides of the center of the seed pressing sleeve, a bottom slide groove is provided in a circular array on the top of the seed pressing sleeve, a seed blocking wedge is provided inside the bottom slide groove, a wedge block return spring is provided on the back of the seed blocking wedge block, and the end of the wedge block return spring is provided on the inner wall of the bottom slide groove.

[0011] Preferably, during the rotation of the seed dividing turntable, the seeds will enter the seed trough. When the seed trough passes through the brush, the brush will sweep out the excess seeds in the seed trough. When the seed trough rotates to the lower side of the seed dividing box, the seeds will pass through the discharge pipe and fall into the seed pressing sleeve. At the same time, the seed blocking wedge will block the seeds and fix the seeds at the bottom of the seed pressing sleeve to prevent the seeds from falling.

[0012] Furthermore, a seed pressing shaft spring is provided at the top of the seed pressing shaft, the top of the seed pressing shaft spring is provided at the top of the inner part of the seed pressing shaft sleeve, the seed pressing shaft spring is located in the spring air cavity, the bottom of the seed pressing shaft is provided with a bottom end groove, the center of the seed pressing shaft is provided with an air passage passing through, and pressure rods are provided on both sides of the seed pressing shaft, and the pressure rods slide in the positioning grooves.

[0013] Preferably, when the seed dividing turntable rotates, the lever of the seed dividing turntable will press down the pressure rod of the seed pressing shaft, drive the seed pressing shaft to move downward, and squeeze the seed blocking wedge at the bottom of the seed pressing shaft sleeve, drive the seeds to break through the water-permeable membrane and insert into the soil. When the seed pressing shaft retracts, the gas in the spring air cavity is ejected downward through the air channel to prevent the seeds in the bottom groove from sliding out of the soil with the seed pressing shaft. Compared with the duckbill seeder, the holes produced on the water-permeable membrane are smaller, which can prevent heat loss in a low temperature environment.

[0014] Furthermore, the film covering device includes a film hanging rod and a water-permeable film, support rods on both sides of the film hanging rod are arranged on a hanging frame, and the water-permeable film rotates on the film hanging rod.

[0015] Furthermore, the suspension frame is provided with cross bar one, cross bar two and cross bar three, cross bar one is provided with a connecting suspension and a connecting seat, the front side of cross bar one is provided with a loosening rod, cross bar three is provided with a pressing wheel, a pressing wheel buffer spring is provided between the pressing wheel and cross bar three, covering wheels are provided on both sides of the rear of the suspension frame, and the support plate is provided on cross bar one and cross bar two.

[0016] Preferably, after the seed planting is completed, the covering wheel on the rear side of the hanging frame performs soil covering operations to cover the ground film with soil again, which solves the phenomenon of seedling hole displacement caused by thermal expansion and contraction of the ground film due to sunlight exposure, effectively prevents the seedlings from being scalded and killed due to seedling hole displacement, and effectively prevents the strong wind from tearing the ground film.

[0017] Furthermore, the power transmission device includes a power worm and an output gear shaft, the power worm is meshed with the output gear shaft, and the power worm and the output gear shaft are arranged in a gear box.

[0018] Furthermore, the power transmission device also includes a transmission rod 1, a transmission rod 2 and a driving shaft sleeve, the transmission rod 2 rotates on the transmission rod fixing seat, transmission wheels 2 are provided on both sides of the transmission rod 2, and transmission columns are arrayed on the transmission rod 2. The transmission column and the transmission wheel 1 are connected by a transmission belt, the transmission rod 1 passes through the soil lifting device, the driving shaft sleeve is arranged between the soil lifting device and the transmission rod 1, the soil lifting chain is arranged on the driving shaft sleeve, and a transmission wheel 3 is provided on the driving shaft sleeve. The transmission wheel 2 is connected to the transmission wheels 3 on both sides by a transmission belt, and the output gear shaft and the transmission wheel 3 are connected by a transmission belt.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] 1. The loosening rod on the front side of the hanging frame breaks the soil, and the soil collecting trough of the soil lifting box opens a ditch on the farmland. The excess soil is transferred to the soil discharge chute by the soil lifting chain. The soil at the rear is covered on the permeable film. As the machine moves forward, the permeable film on the film hanging rod is continuously pulled out and covered on the ditch. At the same time, the soil in the soil discharge chute falls to the ground after the film is covered through the soil dividing plate. Preliminary soil covering is carried out on both sides of the ditch to form a ridge slope, which is conducive to the collection of rainwater.

[0021] 2. During the rotation of the seed dividing turntable, the seeds will enter the seed trough. When the seed trough passes the brush, the brush will sweep out the excess seeds in the seed trough. When the seed trough rotates to the lower side of the seed dividing box, the seeds will pass through the discharge pipe and fall into the seed pressing sleeve. At the same time, the seed blocking wedge will block the seeds and fix the seeds at the bottom of the seed pressing sleeve to prevent the seeds from falling.

[0022] 3. When the seed dividing turntable rotates, the lever of the seed dividing turntable will press down the pressure rod of the seed pressing shaft, drive the seed pressing shaft to move downward, and squeeze the seed blocking wedge at the bottom of the seed pressing shaft sleeve, drive the seeds to break through the water-permeable membrane and insert into the soil. When the seed pressing shaft retracts, the gas in the spring air cavity is ejected downward through the air channel to prevent the seeds in the bottom groove from sliding out of the soil with the seed pressing shaft. Compared with the duckbill seeder, the holes produced on the water-permeable membrane are smaller, which prevents heat loss in a low temperature environment.

[0023] 4. After the seed planting is completed, the covering wheel on the rear side of the hanging frame is used to cover the soil and press the ground film again, which solves the phenomenon of seedling hole displacement caused by thermal expansion and contraction of the ground film due to sunlight exposure, effectively prevents the seedlings from being scalded and killed due to seedling hole displacement, and effectively prevents the strong wind from tearing the ground film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of a film-laying device for agricultural planting proposed by the present invention;

[0025] Figure 2 This is a top view of a film laying device for agricultural planting proposed by the present invention;

[0026] Figure 3 for Figure 2 A cross-sectional view along the cutting line AA;

[0027] Figure 4 for Figure 2 A cross-sectional view along the cutting line BB;

[0028] Figure 5 for Figure 2 A cross-sectional view along the cutting line CC;

[0029] Figure 6 for Figure 3 A cross-sectional view along the cutting line DD;

[0030] Figure 7 This is a structural schematic diagram of a seed separation turntable of a film laying device for agricultural planting proposed by the present invention;

[0031] Figure 8 for Figure 3 A partial enlarged view of point Ⅰ in the middle.

[0032] Among them, 1, soil lifting device, 11, soil lifting box, 111, soil trough, 112, soil discharge trough, 1121, soil dividing plate, 113, support plate, 114, transmission rod fixing seat, 12, soil lifting chain, 2, seeding device, 21, seed storage box, 22, seed dividing box, 221, feed pipe, 223, brush, 222, feed pipe, 23, seed dividing turntable, 231, seed trough, 232, lever, 233, transmission wheel one, 24, seed pressing shaft sleeve, 241, spring air cavity, 242, positioning groove, 243, bottom slide, 244, seed blocking wedge, 245, wedge reset spring, 25, seed pressing shaft, 2 51. Seed pressing shaft spring, 252. Air duct, 253. Bottom end groove, 254. Pressure rod, 3. Film covering device, 31. Film hanging rod, 32. Permeable membrane, 4. Suspension frame, 41. Cross bar one, 411. Connecting suspension, 412. Connecting seat, 413. Loosening rod, 42. Cross bar two, 43. Cross bar three, 44. Pressing wheel, 441. Pressing wheel buffer spring, 45. Covering wheel, 5. Power transmission device, 51. Power worm, 52. Output gear shaft, 53. Transmission rod one, 54. Transmission rod two, 541. Transmission wheel two, 542. Transmission column, 55. Drive shaft sleeve, 551. Transmission wheel three.

[0033] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0036] like Figures 1-8As shown, the present invention proposes a film laying device for agricultural planting, comprising a soil lifting device 1, a seed metering device 2, a film covering device 3, a hanging frame 4 and a power transmission device 5, the power transmission device 5 is arranged on the upper side of the hanging frame 4, the soil lifting device 1, the seed metering device 2 and the film covering device 3 are linearly arrayed on the lower side of the hanging frame 4, and the film covering device 3 is located between the seed metering device 2 and the soil lifting device 1; the soil lifting device 1 comprises a soil lifting box 11 and a soil lifting chain 12, the soil lifting chain 12 rotates in the soil lifting box 11, the front end of the soil lifting box 11 is provided with a soil collecting trough 111, the rear end of the soil lifting box 11 is provided with a soil discharge trough 112, the soil discharge trough 112 is provided with a soil dividing plate 1121, the middle of the soil lifting box 11 is provided with a support plate 113, the support plate 113 is provided on the hanging frame 4, and transmission rod fixing seats 114 are provided on both sides of the rear wall of the soil discharge trough 112.

[0037] The seed metering device 2 includes a seed storage box 21, a seed sorting box 22 and a seed sorting turntable 23. The seed storage box 21 is arranged above the seed sorting box 22. The seed sorting turntable 23 rotates in the seed sorting box 22. The seed sorting box 22 is arranged on the rear wall of the soil discharge trough 112.

[0038] A feed pipe 221 is provided above the seeding box 22, a discharge pipe 222 is provided below the seeding box 22, a brush 223 is provided inside the seeding box 22, the brush 223 is located at the lower side of the feed pipe 221, the brush 223 slides on the side wall of the seeding turntable 23, the seed storage box 21 is connected to the feed pipe 221, a seed groove 231 is provided on the edge of the seeding turntable 23, and a shift rod 232 is provided on both sides of the center of the seeding turntable 23. The shift rod 232 is located outside the seeding box 22, and a transmission wheel 233 is provided outside the shift rod 232.

[0039] The seed metering device 2 also includes a seed pressing sleeve 24 and a seed pressing shaft 25. The seed pressing sleeve 24 is arranged on the discharge pipe 222. The seed pressing sleeve 24 is connected to the discharge pipe 222. The seed pressing shaft 25 slides in the seed pressing sleeve 24. A spring air cavity 241 is formed between the top end of the seed pressing sleeve 24 and the upper end of the seed pressing shaft 25.

[0040] There are positioning grooves 242 on both sides of the center of the seed pressing sleeve 24, and a bottom slide groove 243 is provided in a circular array on the top of the seed pressing sleeve 24. A seed blocking wedge 244 is provided inside the bottom slide groove 243, and a wedge block return spring 245 is provided on the back of the seed blocking wedge block 244. The end of the wedge block return spring 245 is provided on the inner wall of the bottom slide groove 243.

[0041] A seed pressing shaft spring 251 is provided at the top of the seed pressing shaft 25, and the top of the seed pressing shaft spring 251 is provided at the top of the inner part of the seed pressing shaft sleeve 24. The seed pressing shaft spring 251 is located in the spring air cavity 241. A bottom end groove 253 is provided at the bottom of the seed pressing shaft 25, and an air channel 252 is provided through the center of the seed pressing shaft 25. Pressure rods 254 are provided on both sides of the seed pressing shaft 25, and the pressure rods 254 slide in the positioning groove 242.

[0042] The film covering device 3 includes a film hanging rod 31 and a water-permeable membrane 32 . Support rods on both sides of the film hanging rod 31 are arranged on the suspension frame 4 , and the water-permeable membrane 32 rotates on the film hanging rod 31 .

[0043] The suspension frame 4 is provided with a cross bar 1 41, a cross bar 2 42 and a cross bar 3 43. The cross bar 1 41 is provided with a connecting suspension 411 and a connecting seat 412. The front side of the cross bar 1 41 is provided with a loosening rod 413. The cross bar 3 43 is provided with a pressing wheel 44. A pressing wheel buffer spring 441 is provided between the pressing wheel 44 and the cross bar 3 43. Covering wheels 45 are provided on both sides of the rear of the suspension frame 4. The support plate 113 is provided on the cross bar 1 41 and the cross bar 2 42.

[0044] The power transmission device 5 includes a power worm 51 and an output gear shaft 52 . The power worm 51 is meshed with the output gear shaft 52 . The power worm 51 and the output gear shaft 52 are arranged in a gear box.

[0045] The power transmission device 5 also includes a transmission rod 1 53, a transmission rod 2 54 and a drive sleeve 55. The transmission rod 2 54 rotates on the transmission rod fixing seat 114. Transmission wheels 2 541 are provided on both sides of the transmission rod 2 54. A transmission column 542 is arrayed on the transmission rod 2 54. The transmission column 542 is connected to the transmission wheel 1 233 through a transmission belt. The transmission rod 1 53 passes through the soil lifting device 1. The drive sleeve 55 is provided between the soil lifting device 1 and the transmission rod 1 53. The soil lifting chain 12 is provided on the drive sleeve 55. The drive sleeve 55 is provided with a transmission wheel 3 551. The transmission wheel 2 541 is connected to the transmission wheels 3 551 on both sides through a transmission belt. The output gear shaft 52 is connected to the transmission wheel 3 551 through a transmission belt.

[0046] During specific use, the tractor pulls the equipment through the connecting suspension 411 and the connecting seat 412 to operate, and at the same time drives the power worm 51 to rotate, the power worm 51 drives the output gear shaft 52 to rotate, and the output gear shaft 52 drives the middle drive sleeve 55 on the transmission rod 1 53 to rotate, thereby driving the transmission rod 1 53 to rotate, and all the drive sleeves 55 on the transmission rod 1 53 rotate with it, and the drive sleeve 55 drives the soil lifting chain 12 to rotate. At the same time, the transmission wheel three 551 on both sides drives the transmission wheel 2 541 to rotate, and the transmission wheel 2 541 drives the transmission rod 2 54 to rotate. The transmission column 542 on the transmission rod 2 54 drives the transmission wheel 1 233 on both sides of the seeding turntable 23 to rotate, that is, the seeding turntable 23 rotates.

[0047] The loosening rod 413 on the front side of the hanging frame 4 breaks the soil, and the soil collecting trough 111 of the soil lifting box 11 opens a ditch on the farmland. The excess soil is transferred to the soil discharge trough 112 by the soil lifting chain 12. As the machine moves forward, the permeable membrane 32 at the rear is covered with soil, and the permeable membrane 32 on the film hanging rod 31 is continuously pulled out and covered on the ditch. At the same time, the soil in the soil discharge trough 112 falls to the ground after the film is covered through the soil dividing plate 1121, and preliminary soil covering is carried out on both sides of the ditch to form a ridge slope, which is conducive to the collection of rainwater.

[0048] After the initial covering of the soil, the seeding device 2 is used to plant the seeds, wherein the seeds in the seed storage box 21 enter the upper side of the seeding box 22 through the feeding pipe 221. When the seed groove 231 on the seeding turntable 23 rotates to the upper side of the seeding box 22, the seeds enter the seed groove 231. As the seeding turntable 23 rotates, the seed groove 231 will pass through the brush 223. While the brush blocks the seeds, it sweeps out the excess seeds in the seed groove 231. When the seed groove 231 rotates to the lower side of the seeding box 22, the seeds fall into the seed pressing shaft sleeve 24 through the feeding pipe 222 and are blocked by the seed blocking wedge 244 at the bottom of the seed pressing shaft sleeve 24. At the same time, the driving rod 232 of the seeding turntable 23 rotates downward and presses the pressing rod 254 of the seed pressing shaft 25, thereby driving the seed pressing shaft 25 to move downward. During the downward movement of the seed pressing shaft 25, the seed pressing shaft spring 251 is stretched, and air passes through the air of the seed pressing shaft 25. The gas in the spring air cavity 241 is ejected downward through the air duct 252, preventing the seeds in the bottom groove 253 from sliding out of the soil with the seed pressing shaft 25, and as the pressing wheel 44 passes over, the soil is covered on the seeds.

[0049] After the seed planting is completed, the covering wheel 45 on the rear side of the suspension frame 4 performs the covering operation to cover the ground film with soil again, thereby solving the phenomenon of seedling hole displacement caused by thermal expansion and contraction of the ground film due to sunlight exposure, effectively preventing the seedlings from being scalded and dying due to seedling hole displacement, and effectively preventing the strong wind from tearing the ground film.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

[0052] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A film laying device for agricultural planting, characterized by: The invention comprises a soil lifting device (1), a seeding device (2), a film covering device (3), a hanging frame (4) and a power transmission device (5), wherein the power transmission device (5) is arranged on the upper side of the hanging frame (4), the soil lifting device (1), the seeding device (2) and the film covering device (3) are arranged in a linear array on the lower side of the hanging frame (4), and the film covering device (3) is located between the seeding device (2) and the soil lifting device (1); The soil lifting device (1) comprises a soil lifting box (11) and a soil lifting chain (12), wherein the soil lifting chain (12) rotates in the soil lifting box (11), a soil collecting trough (111) is provided at the front end of the soil lifting box (11), a soil discharge trough (112) is provided at the rear end of the soil lifting box (11), a soil dividing plate (1121) is provided in the soil discharge trough (112), a support plate (113) is provided in the middle of the soil lifting box (11), the support plate (113) is provided on the suspension frame (4), and transmission rod fixing seats (114) are provided on both sides of the rear wall of the soil discharge trough (112); The seed metering device (2) includes a seed storage box (21), a seed sorting box (22) and a seed sorting turntable (23), wherein the seed storage box (21) is arranged above the seed sorting box (22), the seed sorting turntable (23) rotates in the seed sorting box (22), and the seed sorting box (22) is arranged on the rear wall of the soil discharge trough (112); A feed pipe (221) is provided above the seed separation box (22), a discharge pipe (222) is provided below the seed separation box (22), a brush (223) is provided inside the seed separation box (22), the brush (223) is located below the feed pipe (221), the brush (223) slides on the side wall of the seed separation turntable (23), the seed storage box (21) is connected to the feed pipe (221), a seed groove (231) is provided on the edge of the seed separation turntable (23), a shifting rod (232) is provided on both sides of the center of the seed separation turntable (23), the shifting rod (232) is located outside the seed separation box (22), and a transmission wheel (233) is provided outside the shifting rod (232); The seed metering device (2) further includes a seed pressing sleeve (24) and a seed pressing shaft (25), wherein the seed pressing sleeve (24) is provided on the feed tube (222), the seed pressing sleeve (24) is communicated with the feed tube (222), the seed pressing shaft (25) slides in the seed pressing sleeve (24), and a spring air cavity (241) is formed between the top end of the seed pressing sleeve (24) and the upper end of the seed pressing shaft (25); Positioning grooves (242) are provided on both sides of the center of the seed pressing sleeve (24), a bottom chute (243) is provided in a circumferential array on the top of the seed pressing sleeve (24), a seed blocking wedge (244) is provided inside the bottom chute (243), a wedge block return spring (245) is provided on the back of the seed blocking wedge block (244), and the end of the wedge block return spring (245) is provided on the inner wall of the bottom chute (243); A seed pressing shaft spring (251) is provided at the top of the seed pressing shaft (25), and the top of the seed pressing shaft spring (251) is provided at the top end of the seed pressing shaft sleeve (24). The seed pressing shaft spring (251) is located in the spring air cavity (241). A bottom end groove (253) is provided at the bottom of the seed pressing shaft (25), and an air passage (252) is provided through the center of the seed pressing shaft (25). Pressure rods (254) are provided on both sides of the seed pressing shaft (25), and the pressure rods (254) slide in the positioning grooves (242).

2. The film laying device for agricultural planting according to claim 1, characterized in that: The film covering device (3) comprises a film hanging rod (31) and a water-permeable membrane (32); support rods on both sides of the film hanging rod (31) are arranged on a hanging frame (4); and the water-permeable membrane (32) rotates on the film hanging rod (31).

3. The film laying device for agricultural planting according to claim 2, characterized in that: The suspension frame (4) is provided with a crossbar 1 (41), a crossbar 2 (42) and a crossbar 3 (43); the crossbar 1 (41) is provided with a connecting suspension (411) and a connecting seat (412); the front side of the crossbar 1 (41) is provided with a loosening rod (413); the crossbar 3 (43) is provided with a pressing wheel (44); a pressing wheel buffer spring (441) is provided between the pressing wheel (44) and the crossbar 3 (43); soil covering wheels (45) are provided on both sides of the rear of the suspension frame (4); and the support plate (113) is provided on the crossbar 1 (41) and the crossbar 2 (42).

4. The film laying device for agricultural planting according to claim 3, characterized in that: The power transmission device (5) comprises a power worm (51) and an output gear shaft (52), wherein the power worm (51) is meshingly connected with the output gear shaft (52), and the power worm (51) and the output gear shaft (52) are arranged in a gear box.

5. The film laying device for agricultural planting according to claim 4, characterized in that: The power transmission device (5) further comprises a transmission rod 1 (53), a transmission rod 2 (54) and a drive shaft sleeve (55), wherein the transmission rod 2 (54) rotates on the transmission rod fixing seat (114), a transmission wheel 2 (541) is provided on both sides of the transmission rod 2 (54), a transmission column (542) is arranged on the transmission rod 2 (54), the transmission column (542) and the transmission wheel 1 (233) are connected by a transmission belt, the transmission rod 1 (53) passes through the soil lifting device (1), the drive shaft sleeve (55) is provided between the soil lifting device (1) and the transmission rod 1 (53), the soil lifting chain (12) is provided on the drive shaft sleeve (55), a transmission wheel 3 (551) is provided on the drive shaft sleeve (55), the transmission wheel 2 (541) and the transmission wheels 3 (551) on both sides are connected by a transmission belt, and the output gear shaft (52) and the transmission wheel 3 (551) are connected by a transmission belt.

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