A seed spot sowing device for crop planting

Abstract

The invention relates to the technical field of agricultural equipment, and discloses a seed spot sowing device for crop planting, comprising: a multi-layer frame, which is driven by an output source installed on a sowing vehicle to perform lifting movement, and is provided with an upper half layer and a lower half layer from top to bottom. The invention inserts a hemispherical cover formed by three fan-shaped covers in a contracted state into a sowing pit, so that loose crushed soil can be gathered together and compacted to form a tight soil pile, and then the three fan-shaped covers are expanded outward, so that crop seeds can be directly dropped onto the soil pile along a feed pipe, so that the seeds are in close contact with the soil pile, and then a water pipe is inserted into the gap for water injection, so as to ensure that the seeds can obtain sufficient moisture, avoid the problem that the seeds are directly dropped into the sowing pit and are suspended by the loose crushed soil, resulting in the seeds not being able to fully contact with the soil, and the crushed soil pile containing large gaps is easy to collapse after watering, resulting in the problem that the seeds are buried too deeply.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural equipment, and in particular to a seed spot sowing device used for planting crops. Background Art

[0002] A sowing device is a device used for agriculture and vegetation planting and sowing. During the sowing process, it is necessary to open grooves to place seeds. After the seeds are placed, the grooves are buried to prevent the seeds from being washed away by rainwater. At the same time, the seeds are ensured to be soaked in the soil for absorption by vegetation.

[0003] In the process of sowing in farmland, digging holes is a key step, which directly affects the germination rate of seeds and the growth conditions of crops. However, in actual operation, a large amount of loose and broken soil is often generated when digging holes. These broken soils remain at the bottom of the holes, and there are often large gaps between the broken soils. At this time, when seeds are scattered into the holes, the seeds will be suspended by the broken soil instead of being in close contact with the soil. When watering is then carried out, the loose broken soil will accelerate the loss of water, because the water will directly penetrate into the deep soil along the gaps in the broken soil, instead of being effectively retained near the seeds to provide the seeds with the necessary moisture. In addition, after the water penetrates, the loose broken soil will collapse, causing the position of the seeds to move downward. During the subsequent burial, the seeds will be buried too deeply, affecting their normal germination. Based on this, the present invention purposely provides a seed sowing device for crop planting that can eliminate the gaps in the broken soil at the bottom of the pit and improve the accuracy of sowing operations. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and provide a seed spot sowing device for crop planting that can eliminate the gaps in the broken soil at the bottom of the pit and improve the accuracy of the sowing operation, so as to solve the technical problems that during the sowing process, loose broken soil accumulates when digging a pit, resulting in the seeds being suspended in the air, making it impossible for the seeds to fully contact the soil and moisture, and the seeds may be buried too deep.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A seed spot sowing device for crop planting, comprising:

[0007] A multi-layer frame, which is driven by an output source installed on a seeding vehicle to perform lifting movement, and is provided with an upper half layer and a lower half layer from top to bottom, a feed pipe is fixedly installed on the multi-layer frame, the feed pipe is coaxially arranged with the multi-layer frame, and its feed end is connected to a quantitative feeding device, a sleeve is rotatably connected in the feed pipe, and the sleeve is driven by a driving source arranged on the multi-layer frame to perform reciprocating rotation, a lifting carrier is slidably connected to the sleeve, the lifting carrier is located in the lower half layer, and is fixedly connected to the movable end of an electric cylinder fixedly installed in the upper half layer, three circumferentially arranged water pipes are fixedly installed on the lifting carrier, and the inlet end of the water pipe is connected to a water supply tank;

[0008] A fixed plate is fixedly installed at the bottom end of the multi-layer frame, and three fan-shaped covers are slidably connected thereto. The three fan-shaped covers are arranged circumferentially, and each fan-shaped cover corresponds to a contraction component. The sleeve drives the fan-shaped cover to move through the contraction component. Each fan-shaped cover is provided with a through hole corresponding to the water pipe. When the three fan-shaped covers are in a contracted state, the three fan-shaped covers form a hemispherical cover, and the water pipe is misaligned with the through hole. At this time, the driving source drives the sleeve to rotate counterclockwise, and the sleeve drives the three fan-shaped covers to expand outward through the contraction component, and the water pipe is aligned with the through hole.

[0009] As a further solution of the present invention: each of the contraction components includes a connecting column, a connecting rod, a cylindrical block and a waist-shaped groove, the waist-shaped groove is opened on the fixed plate, the cylindrical block is fixedly connected to the top of the fan-shaped cover, and it is slidably connected to the waist-shaped groove, the connecting column is fixedly connected to the bottom end of the sleeve, one end of the connecting rod is rotatably connected to the cylindrical block, and the other end is rotatably connected to the connecting column.

[0010] As a further solution of the present invention: a limit block is fixedly installed on the outer circular surface of the sleeve, the limit block is located in the lower half layer, and a slide groove is provided on the lifting carrier plate. When the three fan-shaped covers are in a retracted state, the limit block and the slide groove are misaligned; when the three fan-shaped covers are in an expanded state, the limit block and the slide groove are aligned, and the two are slidably connected.

[0011] As a further solution of the present invention: a fan-shaped protrusion is fixedly installed on the top of the inner wall of each fan-shaped cover, and when the three fan-shaped covers are in a retracted state, the three fan-shaped protrusions form a hemispherical protrusion.

[0012] As a further solution of the present invention: an extension block is fixedly mounted on the outer wall of each of the fan-shaped covers, and the tip of the extension block faces the outside of the fan-shaped cover.

[0013] As a further solution of the present invention: thin plates are fixedly installed on both sides of each sector cover.

[0014] As a further solution of the present invention: each of the water pipes is fixedly connected to the top of the multi-layer rack, and a telescopic hose is provided on the water pipe, and the telescopic hose is located in the upper half layer.

[0015] As a further solution of the present invention: the water outlet end of the water delivery pipe is of closed design, and a plurality of water outlets are arranged on the circumference of the side wall of the water outlet end of the water delivery pipe.

[0016] Beneficial effects of the present invention:

[0017] 1. In the present invention, the hemispherical cover formed by the three fan-shaped covers in the contracted state is inserted into the sowing pit, so that the loose broken soil can be gathered together and compacted, eliminating large gaps, so that the broken soil forms a compact soil pile, and then the three fan-shaped covers are expanded outward, so that a gap is formed between the fan-shaped covers and the formed soil pile. At this time, the crop seeds can be directly thrown into the soil pile along the feeding pipe, so that the seeds are in close contact with the soil pile. The water pipe can also be inserted into the gap for water injection, and most of the water will be absorbed by the soil pile under the seeds, ensuring that the seeds can obtain sufficient water, avoiding the problem that the seeds are directly thrown into the sowing pit and are suspended by the loose broken soil, resulting in the seeds not being able to fully contact with the soil, and the broken soil pile with large gaps is easy to collapse after watering, resulting in the problem of seeds being buried too deep;

[0018] 2. In the present invention, when the three fan-shaped covers are switched to the retracted state, the limit block is misaligned with the slide groove, which means that the limit block abuts against the bottom of the lifting carrier plate, and the lifting carrier plate cannot move at this time; and when the three fan-shaped covers are switched to the separated state, the limit block is aligned with the slide groove, and the lifting carrier plate can be lifted and lowered at this time, that is, the water pipe can be inserted downward into the through hole. Such a design can avoid the situation where the water pipe falls and hits the surface of the fan-shaped cover due to misoperation when the water pipe is misaligned with the through hole, and can ensure that when the water pipe is inserted into the through hole to inject water into the seeding pit, the limit block slides in the slide groove, and the driving source cannot drive the sleeve to rotate at this time, that is, the fan-shaped cover cannot be retracted, thereby ensuring the safety of the water pipe;

[0019] 3. In the present invention, the hemispherical cover is inserted into the sowing pit to form a compact truncated cone soil pile from the loose and broken soil, and the hemispherical protrusions will further compact the truncated cone soil pile. On the one hand, the soil pile can be further compacted, and on the other hand, a concave portion can be formed on the top of the truncated cone soil pile, so that the seeds can fall directly into the concave portion, ensuring that the burial depth of the seeds will not change. 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 overall structure of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the bottom of the fan-shaped cover in the present invention;

[0023] Figure 3 It is a schematic diagram of the unfolded structure of the fan-shaped cover in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the fixing plate in the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the fan-shaped protrusion in the present invention;

[0026] Figure 6 The multi-layer rack in the present invention cooperates with the feeding pipe;

[0027] Figure 7 This is a diagram showing the matching of the sleeve and the lifting carrier plate in the present invention;

[0028] Figure 8 It is a structural schematic diagram of the water outlet in the present invention.

[0029] In the figure: 1. multi-layer rack; 101. lower half layer; 102. upper half layer; 2. feed pipe; 3. fixing plate; 301. waist-shaped groove; 4. fan-shaped cover; 401. cylindrical block; 402. through hole; 403. extension block; 404. fan-shaped protrusion; 405. thin plate; 5. sleeve; 501. connecting column; 502. limit block; 6. connecting rod; 7. lifting plate; 701. slide; 8. water pipe; 801. telescopic hose; 802. water outlet; 9. hemispherical protrusion; 10. electric cylinder; 11. hemispherical cover. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-Figure 8 As shown, the present invention is a seed spot sowing device for crop planting, comprising:

[0032] A multi-layer frame 1, which is driven by an output source installed on a seeding vehicle to perform lifting movement, and is provided with an upper half layer 102 and a lower half layer 101 from top to bottom, a feed pipe 2 is fixedly installed on the multi-layer frame 1, the feed pipe 2 is coaxially arranged with the multi-layer frame 1, and its feed end is connected to a quantitative feeding device, a sleeve 5 is rotatably connected in the feed pipe 2, and the sleeve 5 is driven by a driving source arranged on the multi-layer frame 1 to reciprocate, a lifting plate 7 is slidably connected to the sleeve 5, the lifting plate 7 is located in the lower half layer 101, and is fixedly connected to the movable end of an electric cylinder 10 fixedly installed in the upper half layer 102, three circumferentially arranged water pipes 8 are fixedly installed on the lifting plate 7, and the inlet end of the water pipe 8 is connected to a water supply tank;

[0033] A fixed plate 3 is fixedly mounted on the bottom end of the multi-layer frame 1, and three fan-shaped covers 4 are slidably connected thereto. The three fan-shaped covers 4 are arranged circumferentially, and each fan-shaped cover 4 corresponds to a contraction component. The sleeve 5 drives the fan-shaped cover 4 to move through the contraction component. Each fan-shaped cover 4 is provided with a through hole 402 corresponding to the water pipe 8. When the three fan-shaped covers 4 are in a contracted state, the three fan-shaped covers 4 form a hemispherical cover 11, and the water pipe 8 is misaligned with the through hole 402. At this time, the driving source drives the sleeve 5 to rotate counterclockwise, and the sleeve 5 drives the three fan-shaped covers 4 to expand outward through the contraction component, and the water pipe 8 is aligned with the through hole 402.

[0034] In one case of this embodiment, the output source may be a hydraulic rod, an electric telescopic rod or other components, or other mechanisms capable of realizing lifting and lowering movements, and the driving source may be a pulley drive assembly, a gear transmission assembly, etc. This embodiment does not make any specific limitations here; it should be noted that the seeding vehicle, the quantitative feeding equipment and the electric cylinder 10 described in the present invention are all prior arts, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0035] In practical application, if Figure 1 and Figure 3 As shown, when the driving source drives the sleeve 5 to rotate clockwise by a certain angle, the sleeve 5 shrinks the three sector covers 4 to form a hemispherical cover 11 through the shrinking assembly, as shown in FIG. Figure 1 In the retracted state shown in the figure, when the multi-layer frame 1 is inserted into the sowing pit, the hemispherical cover 11 will compact the broken soil, and a truncated cone-shaped soil pile will be formed inside it; and when the driving source drives the sleeve 5 to rotate counterclockwise, the sleeve 5 drives the three fan-shaped covers 4 to expand outward through the retracting assembly, forming Figure 3 In the separation state shown, a cavity is formed in the middle of the three sector-shaped covers 4 during this process, and each sector-shaped cover 4 pushes the surrounding broken soil outward, and a gap is formed between the sector-shaped cover 4 and the truncated cone soil pile in the middle. At this time, the through hole 402 on the expanded sector-shaped cover 4 is aligned with the water pipe 8. In short, the three sector-shaped covers 4 can be switched in form by driving the sleeve 5 to rotate through the driving source;

[0036] During operation, the multi-layer frame 1 is installed on the seeding vehicle, and the three fan-shaped covers 4 of the multi-layer frame 1 are ensured to be in a retracted state. When the seeding vehicle drives to the point where the multi-layer frame 1 is directly above the seeding pit, the multi-layer frame 1 is controlled to descend through the output source. At this time, the hemispherical cover 11 will penetrate into the seeding pit and compact the loose broken soil in the pit to form a truncated cone of soil. Then, the three fan-shaped covers 4 are switched to a separated state. At this time, the seeds can slide onto the truncated cone soil pile through the feeding pipe 2 and the cavity. Then, the electric cylinder 10 is started to push the lifting plate 7 down. The water pipe 8 is inserted into the through hole 402 until its water outlet end is located between the truncated cone soil pile and the fan-shaped cover 4. Then, water is injected into it through the water pipe 8. After completion, the multi-layer frame 1 is moved out of the seeding pit. As the seeding vehicle moves to the next seeding pit, the above steps are repeated to realize continuous sowing of crop seeds.

[0037] By inserting the hemispherical cover 11 formed by the three fan-shaped covers 4 in the contracted state into the sowing pit, the loose crushed soil can be gathered together and compacted, eliminating large gaps, and forming a compact soil mound. Then, the three fan-shaped covers 4 are expanded outward to form a gap between the fan-shaped covers 4 and the formed soil mound. At this time, the crop seeds can be directly thrown into the soil mound along the feed pipe 2 so that the seeds are in close contact with the soil mound. The water pipe 8 can also be inserted into the gap for water injection. Most of the water will be absorbed by the soil mound under the seeds, ensuring that the seeds can obtain sufficient water, avoiding the problem that the seeds are directly thrown into the sowing pit and are suspended by the loose crushed soil, resulting in the seeds not being able to fully contact with the soil, and the crushed soil mound with large gaps is easy to collapse after watering, resulting in the problem of seeds being buried too deep.

[0038] like Figure 3-Figure 7 As shown, as a preferred embodiment of the present invention, each of the contraction components includes a connecting column 501, a connecting rod 6, a cylindrical block 401 and a waist-shaped groove 301, the waist-shaped groove 301 is opened on the fixed plate 3, the cylindrical block 401 is fixedly connected to the top of the fan-shaped cover 4, and it is slidingly connected to the waist-shaped groove 301, the connecting column 501 is fixedly connected to the bottom end of the sleeve 5, one end of the connecting rod 6 is rotatably connected to the cylindrical block 401, and the other end thereof is rotatably connected to the connecting column 501.

[0039] In actual application of this embodiment, when the driving source drives the sleeve 5 to rotate, the position of the connecting column 501 changes, and it drives the cylindrical block 401 to change its position in the waist-shaped groove 301 through the connecting rod 6, so that the fan-shaped cover 4 can be contracted and expanded. The three contraction components can ensure the synchronous movement of the three fan-shaped covers 4.

[0040] like Figure 3-Figure 7As shown, as a preferred embodiment of the present invention, a limit block 502 is fixedly installed on the outer circumferential surface of the sleeve 5, and the limit block 502 is located in the lower half layer 101. A slide groove 701 is provided on the lifting carrier 7. When the three fan-shaped covers 4 are in a retracted state, the limit block 502 and the slide groove 701 are misaligned; when the three fan-shaped covers 4 are in an expanded state, the limit block 502 is aligned with the slide groove 701, and the two are slidably connected.

[0041] In actual application of this embodiment, when the three fan-shaped covers 4 are switched to the retracted state, the limit block 502 is misaligned with the slide groove 701, which means that the limit block 502 abuts against the bottom of the lifting carrier plate 7, and the lifting carrier plate 7 cannot move at this time; and when the three fan-shaped covers 4 are switched to the separated state, the limit block 502 is aligned with the slide groove 701, and the lifting carrier plate 7 can be lifted and lowered, that is, the water pipe 8 can be inserted downward into the through hole 402. Such a design can avoid the situation where the water pipe 8 falls and hits the surface of the fan-shaped cover 4 due to misoperation when the water pipe 8 is misaligned with the through hole 402, and can ensure that when the water pipe 8 is inserted into the through hole 402 to inject water into the sowing pit, since the limit block 502 slides in the slide groove 701, the driving source cannot drive the sleeve 5 to rotate, that is, the fan-shaped cover 4 cannot be retracted, thereby ensuring the safety of the water pipe 8.

[0042] like Figure 1-Figure 5 As shown, as a preferred embodiment of the present invention, a fan-shaped protrusion 404 is fixedly installed on the top of the inner wall of each fan-shaped cover 4, and when the three fan-shaped covers 4 are in a retracted state, the three fan-shaped protrusions 404 form a hemispherical protrusion 9.

[0043] In actual application of this embodiment, the hemispherical cover 11 is inserted into the sowing pit to form a compact conical mound of loose and broken soil, and the hemispherical protrusion 9 will further compact the conical mound. On the one hand, it can further compact the mound, and on the other hand, it can form a concave portion on the top of the concave mound, so that the seeds can fall directly into the concave portion, ensuring that the burial depth of the seeds will not change.

[0044] like Figure 1 As shown, as a preferred embodiment of the present invention, an extension block 403 is fixedly mounted on the outer wall of each of the sector-shaped covers 4 , and the tip of the extension block 403 faces the outside of the sector-shaped cover 4 .

[0045] In actual application of this embodiment, by adding an extension block 403, when the hemispherical cover 11 is inserted into the sowing pit, the tip of the extension block 403 can cut the crushed soil, making the insertion of the hemispherical cover 11 smoother, and when the fan-shaped cover 4 expands outward, the tip of the extension block 403 can also divert the crushed soil to both sides, reducing the movement resistance.

[0046] like Figure 2-Figure 5As shown, as a preferred embodiment of the present invention, thin plates 405 are fixedly mounted on both sides of each sector cover 4.

[0047] In actual application of this embodiment, when the three fan-shaped covers 4 form a hemispherical cover 11 and are inserted into the sowing pit, the thin plate 405 will insert three gaps on the truncated cone soil pile, which can help to a certain extent during subsequent watering, so that water can penetrate into the soil pile through the gaps and get closer to the seeds. On the other hand, when the three fan-shaped covers 4 expand outward for watering, the thin plate 405 can block the broken soil in the gap between two adjacent sleeves 5 to prevent water from being absorbed by the broken soil in the gap, thereby ensuring that most of the water is absorbed by the soil pile under the seeds.

[0048] like Figure 7 As shown, as a preferred embodiment of the present invention, each of the water pipes 8 is fixedly connected to the top of the multi-layer rack 1, and a telescopic hose 801 is provided on the water pipe 8, and the telescopic hose 801 is located in the upper half layer 102.

[0049] In actual application, the present embodiment can enhance the stability of the water pipe 8 by fixedly connecting the water pipe 8 to the top of the multi-layer frame 1, and the provision of the telescopic hose 801 does not affect the lifting of the water pipe 8 by the lifting plate 7.

[0050] like Figure 8 As shown, as a preferred embodiment of the present invention, the water outlet end of the water pipe 8 is of closed design, and a plurality of water outlets 802 are arranged on the circumference of the side wall of the water outlet end of the water pipe 8.

[0051] In actual application of this embodiment, since the fan-shaped cover 4 will be inserted into the sowing pit before the water pipe 8 is inserted into the through hole 402, the crushed soil will inevitably enter the through hole 402, and the closed design of the water outlet end of the water pipe 8 can push the crushed soil out of the through hole 402, and the water outlet 802 is arranged on the side wall of the water pipe 8 and will not be blocked by the crushed soil, thus ensuring the smooth water outlet of the water pipe 8.

[0052] Working principle of the present invention: The above embodiment of the present invention provides a seed spot sowing device for crop planting. When working, the multi-layer frame 1 is installed on the sowing vehicle to ensure that the three fan-shaped covers 4 of the multi-layer frame 1 are in a retracted state. When the sowing vehicle travels to the point where the multi-layer frame 1 is directly above the sowing pit, the multi-layer frame 1 is controlled to descend through the output source. At this time, the hemispherical cover 11 will penetrate into the sowing pit and compact the loose broken soil in the pit to form a truncated cone of soil mound. Then the three fan-shaped covers 4 are switched to a separated state. At this time, the seeds can slide onto the truncated cone soil mound through the feed pipe 2 and the cavity. Immediately afterwards, the electric cylinder 10 starts to push the lifting plate 7 down. The water pipe 8 is inserted into the through hole 402 until its water outlet end is located between the truncated cone soil mound and the fan-shaped cover 4. Then water is injected into it through the water pipe 8. After completion, the multi-layer frame 1 is moved out of the sowing pit. As the sowing vehicle moves to the next sowing pit, the above steps are repeated to achieve continuous spot sowing of crop seeds.

[0053] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A seed sowing device for crop planting, characterized in that: include: A multi-layer frame (1) is driven by an output source installed on a seeding vehicle to perform lifting movement, and is provided with an upper half layer (102) and a lower half layer (101) from top to bottom. A feed pipe (2) is fixedly installed on the multi-layer frame (1), the feed pipe (2) is coaxially arranged with the multi-layer frame (1), and its feed end is connected to a quantitative feeding device. A sleeve (5) is rotatably connected inside the feed pipe (2), and the sleeve (5) is driven by a driving source arranged on the multi-layer frame (1) to perform reciprocating rotation. A lifting plate (7) is slidably connected to the sleeve (5), and the lifting plate (7) is located in the lower half layer (101) and is fixedly connected to the movable end of an electric cylinder (10) fixedly installed in the upper half layer (102). Three circumferentially arranged water pipes (8) are fixedly installed on the lifting plate (7), and the inlet end of the water pipe (8) is connected to a water supply tank; A fixed plate (3) is fixedly mounted on the bottom end of the multi-layer frame (1) and is slidably connected with three fan-shaped covers (4). The three fan-shaped covers (4) are arranged circumferentially, and each fan-shaped cover (4) corresponds to a contraction assembly. The sleeve (5) drives the fan-shaped cover (4) to move through the contraction assembly. Each fan-shaped cover (4) is provided with a through hole (402) corresponding to the water pipe (8). When the three fan-shaped covers (4) are in a contracted state, the three fan-shaped covers (4) form a hemispherical cover (11), and the water pipe (8) and the through hole (402) are misaligned. At this time, the driving source drives the sleeve (5) to rotate counterclockwise, and the sleeve (5) drives the three fan-shaped covers (4) to expand outward through the contraction assembly, and the water pipe (8) is aligned with the through hole (402).

2. A seed spot sowing device for crop planting according to claim 1, characterized in that: Each of the contraction components comprises a connecting column (501), a connecting rod (6), a cylindrical block (401) and a waist-shaped groove (301); the waist-shaped groove (301) is provided on the fixed plate (3); the cylindrical block (401) is fixedly connected to the top of the fan-shaped cover (4) and is slidably connected to the waist-shaped groove (301); the connecting column (501) is fixedly connected to the bottom end of the sleeve (5); one end of the connecting rod (6) is rotatably connected to the cylindrical block (401) and the other end thereof is rotatably connected to the connecting column (501).

3. A seed spot sowing device for crop planting according to claim 1, characterized in that: A limit block (502) is fixedly mounted on the outer circumferential surface of the sleeve (5), and the limit block (502) is located in the lower half layer (101). A sliding groove (701) is provided on the lifting carrier plate (7). When the three sector-shaped covers (4) are in a contracted state, the limit block (502) and the sliding groove (701) are misaligned; when the three sector-shaped covers (4) are in an expanded state, the limit block (502) and the sliding groove (701) are aligned, and the two are slidably connected.

4. A seed spot sowing device for crop planting according to claim 1, characterized in that: A fan-shaped protrusion (404) is fixedly mounted on the top of the inner wall of each fan-shaped cover (4). When the three fan-shaped covers (4) are in a retracted state, the three fan-shaped protrusions (404) form a hemispherical protrusion (9).

5. A seed spot sowing device for crop planting according to claim 1, characterized in that: An extension block (403) is fixedly mounted on the outer wall of each of the sector-shaped covers (4), and the tip of the extension block (403) faces the outside of the sector-shaped cover (4).

6. A seed spot sowing device for crop planting according to claim 1, characterized in that: Thin plates (405) are fixedly mounted on both sides of each sector cover (4).

7. A seed spot sowing device for crop planting according to claim 1, characterized in that: Each of the water pipes (8) is fixedly connected to the top of the multi-layer frame (1), and a telescopic hose (801) is provided on the water pipe (8), and the telescopic hose (801) is located in the upper half layer (102).

8. A seed spot sowing device for crop planting according to claim 1, characterized in that: The water outlet end of the water delivery pipe (8) is of closed design, and a plurality of water outlets (802) are arranged around the side wall of the water outlet end of the water delivery pipe (8).

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