Plastic mulch laying machine for crop planting

Abstract

The application relates to the field of mulching film laying technology and discloses a plastic mulching film laying machine for crop planting, a furrowing plough and a land wheel are sequentially arranged on a machine frame in a rotating mode along a running direction, a soil covering mechanism is located behind the land wheel, a mulching film roll is located above the land ridge and is used for covering the land ridge with the mulching film, a film pressing wheel is used for pressing the two side edges of the mulching film to the soil surface, a soil covering assembly is used for covering the two side edges of the mulching film with soil to press the mulching film, the soil covering assembly comprises a swing frame, a soil planing piece and a soil covering pipe, the swing frame is swingingly arranged on the machine frame, the soil covering pipe is arranged on the swing frame, an inlet is arranged on the circumferential surface of the soil covering pipe, the soil covering pipe is conical, the diameter gradually increases from the outside to the inside, the pipe opening at the inner side of the soil covering pipe is located above the edge of the mulching film, and the soil planing piece is arranged on the swing frame and is used for conveying soil to the inlet. Through the technical scheme, the problem that the traditional disc-shaped soil covering plough is easy to push the mulching film and causes the edge of the mulching film to curl or deviate in position is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ground film laying, and in particular to a plastic ground film laying machine for crop planting. Background Art

[0002] Ground film is mostly plastic film with various colors. It is a commonly used tool in agricultural production. It is used to lay on ridges to maintain soil temperature and moisture, maintain soil structure, and prevent pests from invading crops. After the ground film is laid, soil will be covered at the bottom of the ditch on both sides of the ridge to press the edges of the ground film tightly to ensure the stability of the ground film. The existing ground covering adopts a disc-shaped ground covering plow with an inclined rotation. The rotation of the inclined disc-shaped ground covering plow pushes the adjacent soil to the top of the ground film edge. However, during the pushing process, the disc-shaped ground covering plow and the soil will push the side of the ground film, which can easily cause the edge of the ground film to curl or shift in position. In response to the emergence of the above problems, the existing technology has not solved them well, which has brought troubles to the normal work in this field. Therefore, there is an urgent need for a plastic ground film laying machine for crop planting to solve the above problems. Summary of the Invention

[0003] The present invention provides a plastic mulch film laying machine for crop planting, which solves the problem in the related art that a traditional covering plough easily pushes the mulch film by rotating the covering soil, causing the edge of the mulch film to curl or shift in position.

[0004] The technical solution of the present invention is as follows: A plastic mulch film laying machine for crop planting comprises a frame, a furrowing plow, a ground wheel and a film covering mechanism, wherein the furrowing plow and the ground wheel are sequentially rotated along the travel direction and arranged on the frame, the soil covering mechanism is located behind the ground wheel, the film covering mechanism comprises a mulch film roll, a film pressing wheel and a soil covering assembly, the mulch film roll and the film pressing wheel are both rotatably arranged on the frame, the mulch film roll is located above the ridge and is used to cover the ridge with the mulch film, the film pressing wheel is used to press the edges of both sides of the mulch film to the soil surface, and the soil covering assembly is used to cover the edges of both sides of the mulch film to compact the mulch film.

[0005] The soil covering assembly includes a swing frame, a soil scraping piece and a soil covering pipe. The swing frame is swingably arranged on the frame. The soil covering pipe is arranged on the swing frame. An inlet is opened on the circumferential surface of the soil covering pipe. The soil covering pipe is conical, and the diameter gradually increases from the outside to the inside. The pipe opening on the inner side of the soil covering pipe is located above the edge of the ground film. The soil scraping piece is arranged on the swing frame for transporting soil to the inlet.

[0006] As a further technical solution,

[0007] The soil-scraping member is a covering wheel, which is rotatably arranged at the end portion outside the covering tube. The covering wheel and the covering tube are located on the same axis. A plurality of soil-scraping plates are fixedly arranged on the inner end face of the covering wheel along the circumferential direction. The end of the soil-scraping plate close to the center along the radial direction of the covering wheel abuts against the circumferential surface of the covering tube. The soil-scraping plate and the inlet are located on the same vertical plane.

[0008] As a further technical solution,

[0009] The outer circumference of the covering wheel is provided with a plurality of latch teeth, and the planing plate has a bent section at one end close to the outer side in the radial direction of the covering wheel.

[0010] As a further technical solution,

[0011] It also includes a nailing mechanism, which is located behind the soil covering mechanism. The nailing mechanism includes a lifting frame, a nailing roller and a nailing assembly. The lifting frame is slidably arranged on the frame, and the nailing roller is rotatably arranged on the lifting frame. The outer circumference of the nailing roller is radially provided with a plurality of accommodating cavities.

[0012] The nailing mechanism also includes a pushing block and a nailing spring. The pushing block is arranged in the accommodating cavity and slides axially along the accommodating cavity. One end of the nailing spring acts on the bottom wall of the accommodating cavity, and the other end acts on the pushing block to provide a force for the pushing block to move radially outward. The outlet of the accommodating cavity is located above the edge of the ground film. The upper nailing assembly is provided on the lifting frame and is used to transport fixing nails into the accommodating cavity. The nail heads of the fixing nails in the accommodating cavity face outward and the nail caps face inward.

[0013] As a further technical solution,

[0014] The nailing mechanism also includes a nailing wheel and a limiting shell. The nailing wheel is fixed to the outer end face of the nailing roller. The outer circumference of the nailing wheel has a plurality of locking teeth. The nailing wheel and the nailing roller are located on the same axis. The limiting shell is fixed on the lifting frame. The limiting shell is circular. The nailing roller and the limiting shell are located on the same axis and are rotatable in the limiting shell. The inner side wall of the limiting shell is used to block the outlet of the accommodating cavity. The bottom of the side wall of the limiting shell has a nailing opening.

[0015] As a further technical solution,

[0016] The push block is provided with a limiting portion, and the bottom wall of the limiting shell is provided with a closed slide. The limiting portion is located in the slide. The slide includes a straight segment and a curved segment connected end to end. The straight segment is arranged along the radial direction of the limiting shell, and the nailing port is located on the extension line of the straight segment.

[0017] As a further technical solution,

[0018] The upper nail assembly is an upper nail tube, and the top of the limiting shell has an upper nail opening. The upper nail tube is arranged at the top of the limiting shell and is connected to the upper nail opening. The upper top tube is used to accommodate multiple fixing nails arranged along a straight line.

[0019] As a further technical solution,

[0020] The bottom wall of the accommodating cavity is provided with a magnet, and the nail cap of the fixing nail is made of magnetic material.

[0021] As a further technical solution,

[0022] It also includes a conveying roller and a guide roller. The conveying roller and the guide roller are both rotatably arranged on the frame. The guide rollers are arranged in pairs and are respectively located on both sides of the ridge.

[0023] The working principle and beneficial effects of the present invention are as follows: the frame can be connected to the walking unit, the furrowing plow is a disc-type furrowing plow, which is located at the front, and has two furrowing plows, which are respectively located on both sides of the frame. Two furrows are opened by rotation, and a ridge is formed between the two furrows. The ground wheel at the rear of the furrowing plow rolls at the bottom of the furrow to support the entire device and drive the entire device forward; the ground film roll is rotatably mounted on the frame, and the ground film roll is detachable and easy to replace. The film pressing wheel is rotatably arranged on the frame, and the film pressing wheel rolls at the bottom of the furrow on both sides of the ridge. After the ground film roll is extended, it passes under the film pressing wheel. The stability of the ground film is ensured by the downward pressure of the film pressing wheel. Under the pressure of the film pressing wheel, the rear covering assembly covers the soil to the edges of both sides of the ground film to compact the ground film. In order to prevent the traditional rotating disc-shaped covering plow from pushing the ground film during the covering process, causing the edge of the ground film to curl or shift in position, the covering assembly is used instead of the covering plow. Specifically, the covering assembly includes a swing frame, a soil-scraping piece and a soil-scraping pipe. The soil-scraping pipe and the soil-scraping piece are all arranged on the swing frame. The height of the whole structure can be controlled by the swing of the swing frame. The structure is lifted when not covering the soil, and the swing frame falls when covering the soil.

[0024] When covering the soil, the covering pipe is located above the edges of both sides of the ground film, and the scraping pieces contact the soil. The scraping pieces continuously dig up the soil and transport it into the inlet on the upper circumferential surface of the covering pipe. Because the covering pipe is conical, and the end with the larger diameter of the covering pipe faces inward and is located above the edges of both sides of the ground film, the soil entering the covering pipe will fall from the end with the larger diameter of the covering pipe under the action of gravity and fall to the edges of both sides of the ground film, thereby compacting the ground film. Compared with the existing technology, the method of lifting the soil and dropping it from above the ground film is adopted, and soil is no longer pushed onto the ground film from the side of the ground film, which avoids contact with the edge of the ground film during the bulldozing process and prevents the displacement of the ground film position caused by pushing the ground film. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 Figure 1 is a top view of a plastic mulch laying machine for crop planting according to the present application;

[0027] Figure 2 Figure 2 is a bottom view of a plastic mulch laying machine for crop planting according to the present application;

[0028] Figure 3 Figure 3 is a side view of a plastic mulch laying machine for crop planting according to the present application;

[0029] Figure 4 Figure 4 is a view of a soil covering assembly according to the present application;

[0030] Figure 5 Figure 5 is another view of a soil covering assembly according to the present application;

[0031] Figure 6 Figure 6 is a view of a nailing mechanism according to the present application;

[0032] Figure 7 Figure 7 is a view of a nailing roller according to the present application;

[0033] Figure 8 Figure 8 is a view of the internal structure of a nailing roller according to the present application.

[0034] Figure 1 is a view of a plastic mulch laying machine for crop planting according to the present application; Figure 2 is a bottom view of a plastic mulch laying machine for crop planting according to the present application; Figure 3 is a side view of a plastic mulch laying machine for crop planting according to the present application; Figure 4 is a view of a soil covering assembly according to the present application; Figure 5 is another view of a soil covering assembly according to the present application; Figure 6 is a view of a nailing mechanism according to the present application; Figure 7 is a view of a nailing roller according to the present application; Figure 8 is a view of the internal structure of a nailing roller according to the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work, are involved in the scope of protection of the present application.

[0036] As Figures 1-8As shown, this embodiment proposes a plastic mulch laying machine for crop planting, including a frame 1, a furrowing plow 2, a ground wheel 3 and a film covering mechanism, the furrowing plow 2 and the ground wheel 3 are arranged on the frame 1 in sequence and rotate along the travel direction, the covering mechanism is located behind the ground wheel 3, the covering mechanism includes a mulch roll 4, a film pressing wheel 5 and a soil covering assembly, the mulch roll 4 and the film pressing wheel 5 are both rotatably arranged on the frame 1, the mulch roll 4 is located above the ridge, and is used to cover the ridge with mulch film, the film pressing wheel 5 is used to press the edges of both sides of the mulch film to the soil surface, and the soil covering assembly is used to cover the edges of both sides of the mulch film to compact the mulch film.

[0037] The soil covering assembly includes a swing frame 6, a soil scraping piece and a soil covering pipe 7. The swing frame 6 is swingably arranged on the frame 1. The soil covering pipe 7 is arranged on the swing frame 6. An inlet 8 is opened on the circumferential surface of the soil covering pipe 7. The soil covering pipe 7 is conical, and the diameter gradually increases from the outside to the inside. The pipe mouth on the inner side of the soil covering pipe 7 is located above the edge of the ground film. The soil scraping piece is arranged on the swing frame 6 and is used to transport soil to the inlet 8.

[0038] In this embodiment, the frame 1 can be connected to the walking unit. The furrowing plow 2 is a disc-type furrowing plow 2, which is located at the front. The furrowing plow 2 has two, which are located on both sides of the frame 1. Two furrows are opened by rotation, and a ridge is formed between the two furrows. The ground wheel 3 behind the furrowing plow 2 rolls at the bottom of the furrow to support the entire device and drive the entire device forward; the ground film roll 4 is rotatably installed on the frame 1, and the ground film roll 4 is detachable and easy to replace. The film pressing wheel 5 is rotatably set on the frame 1, and the film pressing wheel 5 rolls at the bottom of the furrow on both sides of the ridge. After the ground film roll 4 is extended, it passes under the film pressing wheel 5. The downward pressure of the overpressure film wheel 5 ensures the stability of the ground film. Under the pressure of the film pressing wheel 5, the rear covering assembly covers the soil to the edges of both sides of the ground film to compact the ground film. In order to prevent the traditional rotating disc-shaped covering plow from pushing the ground film during the covering process, causing the edge of the ground film to curl or shift in position, a covering assembly is used instead of the covering plow. Specifically, the covering assembly includes a swing frame 6, a soil-scraping piece and a soil-scraping pipe 7. The soil-scraping pipe 7 and the soil-scraping piece are all arranged on the swing frame 6. The swing of the swing frame 6 can control the height of the entire structure. When not covering the soil, the structure is lifted up, and when covering the soil, the swing frame 6 falls down.

[0039] When covering, the covering pipe 7 is located above the two side edges of the mulch film, the soil removing part contacts the soil, and the soil removing part continuously digs up the soil and transports it into the inlet 8 on the circumferential surface above the covering pipe 7. Because the covering pipe 7 is conical and the larger-diameter end of the covering pipe 7 faces the inside and is located above the two side edges of the mulch film, the soil entering the covering pipe 7 will fall from the larger-diameter end of the covering pipe 7 under the action of gravity and fall onto the two side edges of the mulch film, thereby achieving the compaction of the mulch film. Compared with the prior art, the soil is lifted and falls from above the mulch film, and the soil is no longer pushed onto the mulch film from the side of the mulch film, thereby avoiding contact with the edge of the mulch film during the pushing process and preventing the mulch film from being pushed to cause curling or position deviation of the edge of the mulch film.

[0040] Further, it further comprises,

[0041] The soil removing part is a covering wheel 9, the covering wheel 9 is rotationally arranged at the end of the outside of the covering pipe 7, the covering wheel 9 is located on the same axis as the covering pipe 7, the inside end surface of the covering wheel 9 is fixed with a plurality of soil removing plates 10 in the circumferential direction, one end of the soil removing plate 10 close to the center in the radial direction of the covering wheel 9 abuts against the circumferential surface of the covering pipe 7, and the soil removing plate 10 is located on the same vertical plane as the inlet 8.

[0042] Further, it further comprises,

[0043] The outer circumference of the covering wheel 9 has a plurality of clamping teeth I, and one end of the soil removing plate 10 close to the outside in the radial direction of the covering wheel 9 has a bending section.

[0044] In this embodiment, the soil removing part is preferably a covering wheel 9, the covering wheel 9 is rotationally arranged at the smaller-diameter end of the outside of the covering pipe 7, the covering wheel 9 is inserted into the soil and rolls in the soil, in order to ensure the stability of the rolling of the covering wheel 9 and prevent slipping, the outer circumference of the covering wheel 9 has a plurality of clamping teeth I; on the end surface of the inside of the covering wheel 9, a plurality of soil removing plates 10 are distributed in the circumferential direction, one end of the soil removing plate 10 close to the outside in the radial direction of the covering wheel 9 has a bending section, which can better dig up the soil during rotation, and one end of the soil removing plate 10 close to the inside in the radial direction of the covering wheel 9 abuts against the outer circumference of the covering pipe 7; when the covering wheel 9 rotates, the soil removing plate 10 contacts the soil and digs up the soil, and as the soil removing plate 10 continues to rotate, the soil removing plate 10 rubs against the outer circumference of the covering pipe 7 and transports the soil to the inlet 8 of the covering pipe 7, the soil enters the covering pipe 7 from the inlet 8, and the transportation of the soil is achieved; in order to ensure the stability of the soil removal of the covering pipe 7, a conveying screw 27 is further rotationally arranged in the covering pipe 7, the thread of the conveying screw 27 is attached to the inner wall of the covering pipe 7, and a pushing force is generated by rotation to stably push the soil in the covering pipe 7 out.

[0045] Further, it further comprises,

[0046] The machine also includes a nailing mechanism, which is located behind the soil covering mechanism. The nailing mechanism includes a lifting frame 11, a nailing roller 12 and a nailing assembly. The lifting frame 11 is slidably mounted on the frame 1, and the nailing roller 12 is rotatably mounted on the lifting frame 11. The outer circumference of the nailing roller 12 is radially provided with a plurality of accommodating cavities 13.

[0047] The nailing mechanism also includes a pushing block 14 and a nailing spring 15. The pushing block 14 is axially slidable in the accommodating cavity 13. One end of the nailing spring 15 acts on the bottom wall of the accommodating cavity 13, and the other end acts on the pushing block 14 to provide a force for the pushing block 14 to move radially outward. The outlet of the accommodating cavity 13 is located above the edge of the ground film. The upper nailing assembly is provided on the lifting frame 11 and is used to transport fixing nails 16 into the accommodating cavity 13. The nail heads of the fixing nails 16 in the accommodating cavity 13 face outward and the nail caps face inward.

[0048] In this embodiment, in order to further improve the stability of the ground film laid on the ground, a nailing mechanism is further provided behind the film covering mechanism along the direction of travel of the device, which is used to insert fixing nails 16 into the ground film. The fixing nails 16 pass through the soil covered on the ground film, the ground film itself and the ground in sequence to firmly fix the ground film on the ground. Specifically, the nailing mechanism includes a lifting frame 11, a nailing roller 12 and a nailing assembly. The nailing roller 12 is rotatably arranged on the lifting frame 11, and the nailing assembly is arranged on the lifting frame 11. The height of the nailing roller 12 is controlled by the lifting of the lifting frame 11, and it is lifted when not nailing. The lifting frame 11 is dropped when nailing; when nailing, the upper nail assembly installs the fixing nail 16 into the accommodating cavity 13, the nail head of the fixing nail 16 faces outward, the nail cap faces inward, the nail cap abuts against the push block 14 in the accommodating cavity 13, and the nailing spring 15 is in a contracted state. As the nailing roller 12 rotates, when the accommodating cavity 13 of the nailing roller 12 with the fixing nail 16 faces the edge of the ground film directly below, the nailing spring 15 releases the accumulated elastic potential energy and inserts the fixing nail 16 into the soil and the ground film, thereby realizing the insertion of the fixing nail 16, thereby ensuring the stability of the ground film with the help of the fixing nail 16.

[0049] Furthermore,

[0050] The nailing mechanism also includes a nailing wheel 17 and a limiting shell 18. The nailing wheel 17 is fixedly mounted on the outer end face of the nailing roller 12. The outer circumference of the nailing wheel 17 has a plurality of locking teeth 2. The nailing wheel 17 and the nailing roller 12 are located on the same axis. The limiting shell 18 is fixedly mounted on the lifting frame 11. The limiting shell 18 is circular. The nailing roller 12 and the limiting shell 18 are located on the same axis and are rotatably arranged in the limiting shell 18. The inner side wall of the limiting shell 18 is used to block the outlet of the accommodating cavity 13. The bottom of the side wall of the limiting shell 18 has a nailing opening 19.

[0051] In this embodiment, the nailing wheel 17 is fixed to the nailing roller 12. The nailing wheel 17 has two locking teeth on its outer circumference to ensure stable rolling in the soil. The nailing roller 12 is driven to rotate by the nailing wheel 17 contacting the ground and rolling. The limiting shell 18 is fixed to the lifting frame 11. The limiting shell 18 is circular. The nailing roller 12 is located within the limiting shell 18. The bottom of the side wall of the limiting shell 18 is provided with a nailing opening 19. The fixed nail 16 is located in the accommodating cavity 13. When the nailing roller 12 rotates in the limiting shell 18, the side wall of the limiting shell 18 can block the accommodating cavity 13, preventing the fixed nail 16 from falling due to its own weight when the accommodating cavity 13 is in a downwardly tilted position. When the accommodating cavity 13 rotates to face directly downward, the limiting shell 18 no longer blocks the accommodating cavity 13. At this time, the nailing spring 15 can push the fixed nail 16 out of the nailing opening 19.

[0052] Furthermore,

[0053] The push block 14 has a limiting portion 20, and the bottom wall of the limiting shell 18 has a closed slide 21. The limiting portion 20 is located in the slide 21. The slide 21 includes a straight segment and a curved segment connected end to end. The straight segment is arranged along the radial direction of the limiting shell 18, and the nailing port 19 is located on the extension line of the straight segment.

[0054] In this embodiment, to control the automatic release of the elastic potential energy of the nail driving spring 15 when it is directed downward, a limiting portion 20 is provided on the push block 14. A closed slideway 21, connected end to end, is defined on the bottom wall of the limiting housing 18. The limiting portion 20 is located within the slideway 21, and the slideway 21 controls the radial position of the push block 14. The slideway 21 comprises a straight segment and a curved segment, which are connected end to end to form the closed slideway 21. Specifically, the straight segment is arranged radially along the nail driving roller 12. When the limiting portion 20 is located in the curved segment, the push block 14 is positioned relatively close to the bottom of the accommodating chamber 13, compressing the nail driving spring 15. As the nail driving roller 12 rotates, when the limiting portion 20 moves from the curved segment to the straight segment, the limiting portion 20, under the action of the nail driving spring 15, slides rapidly radially outward along the trajectory of the straight segment, thereby rapidly ejecting the fixing nail 16 with the help of the push block 14. As the nailing roller 12 continues to rotate, the limiting portion 20 enters the curved section from the straight section and returns to the initial position; as the nailing roller 12 rotates, the multiple accommodating cavities 13 on the circumference push the fixing nails 16 downward in turn, so that multiple fixing nails 16 are evenly distributed on the edge of the ground film.

[0055] Furthermore,

[0056] The upper nail assembly is an upper nail tube 22, and the top of the limiting shell 18 has an upper nail opening 23. The upper nail tube 22 is arranged at the top of the limiting shell 18 and is connected to the upper nail opening 23. The upper top tube is used to accommodate multiple fixing nails 16 arranged along a straight line.

[0057] In this embodiment, the nailing assembly is preferably an upper nail tube 22, and a plurality of fixed nails 16 are axially installed in the upper nail tube 22. An upper nail opening 23 is opened at the top of the side wall of the limiting shell 18. The upper nail tube 22 is arranged at the top of the limiting shell 18 and is connected with the upper nail opening 23. As the nailing roller 12 rotates, when the accommodating chamber 13 rotates to be connected with the upper nail opening 23, the fixed nail 16 falls into the accommodating chamber 13 due to its own weight. The length of the accommodating chamber 13 can only accommodate one fixed nail 16, thereby realizing intermittent quantitative nailing.

[0058] Furthermore,

[0059] The bottom wall of the accommodating cavity 13 is provided with a magnet 24 , and the nail cap of the fixing nail 16 is made of magnetic material.

[0060] In this embodiment, in order to ensure the stability of the fixing nail 16 in the accommodating chamber 13 and prevent the fixing nail 16 from shaking during the rotation of the nailing roller 12, a magnet 24 is also provided on the bottom wall of the accommodating chamber 13. The nail cap of the fixing nail 16 is made of magnetic material. After the fixing nail 16 enters the accommodating chamber 13, the magnet 24 generates an attractive force on the nail cap, which can keep the fixing nail 16 stable in the accommodating chamber 13. When the accommodating chamber 13 rotates to face directly downward, the nailing spring 15 pushes out the fixing nail 16, and the magnetic force is no longer generated when the distance between the fixing nail 16 and the magnet 24 becomes larger.

[0061] Furthermore,

[0062] It also includes a conveying roller 25 and a guide roller 26. The conveying roller 25 and the guide roller 26 are both rotatably arranged on the frame 1. The guide rollers 26 are arranged in pairs and are respectively located on both sides of the ridge.

[0063] In this embodiment, the conveying roller 25 is located between the ground film roll 4 and the guide roller 26. The contact area between the conveying roller 25 and the ground film is large. Sufficient contact ensures that the ground film is not easy to slip during transportation. The guide roller 26 is located between the conveying roller 25 and the film pressing wheel 5. The two guide rollers 26 are respectively located on both sides of the ridge and are lower than the ridge. The edges of both sides of the ground film can be pressed downward toward the bottom of the ditch in advance, so that the film pressing wheel 5 can better press the ground film.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic mulch laying machine for crop planting, characterized in that: The machine comprises a frame, a furrowing plow, a ground wheel and a covering mechanism. The furrowing plow and the ground wheel are arranged on the frame in sequence and rotate along the direction of travel. The covering mechanism is located behind the ground wheel. The covering mechanism comprises a ground film roll, a film pressing wheel and a covering assembly. The ground film roll and the film pressing wheel are both rotatably arranged on the frame. The ground film roll is located above the ground ridge and is used to cover the ground ridge with ground film. The film pressing wheel is used to press the edges of both sides of the ground film to the soil surface. The covering assembly is used to cover the edges of both sides of the ground film with soil to compact the ground film. The soil covering assembly includes a swing frame, a soil scraping piece and a soil covering pipe. The swing frame is swingably mounted on the frame. The soil covering pipe is mounted on the swing frame. An inlet is opened on the circumferential surface of the soil covering pipe. The soil covering pipe is conical, and its diameter gradually increases from the outside to the inside. The pipe opening on the inside of the soil covering pipe is located above the edge of the ground film. The soil scraping piece is mounted on the swing frame and is used to transport soil to the inlet. The soil-scraping member is a covering wheel, which is rotatably arranged at the end portion of the outer side of the covering pipe. The covering wheel and the covering pipe are located on the same axis. A plurality of soil-scraping plates are fixedly arranged along the circumferential direction on the inner end surface of the covering wheel. The ends of the soil-scraping plates close to the center along the radial direction of the covering wheel abut against the circumferential surface of the covering pipe. The soil-scraping plates and the inlet are located on the same vertical plane. It also includes a nailing mechanism, which is located behind the soil covering mechanism. The nailing mechanism includes a lifting frame, a nailing roller and a nailing assembly. The lifting frame is slidably arranged on the frame, and the nailing roller is rotatably arranged on the lifting frame. The outer circumference of the nailing roller is radially provided with multiple accommodating cavities. The nailing mechanism also includes a push block and a nailing spring. The push block slides axially along the accommodating cavity and is arranged in the accommodating cavity. One end of the nailing spring acts on the bottom wall of the accommodating cavity, and the other end acts on the push block to provide a force for the push block to move radially outward. The outlet of the accommodating cavity is located above the edge of the ground film. The nailing assembly is provided on the lifting frame and is used to deliver the fixing nails into the accommodating cavity. The nail heads of the fixing nails in the accommodating cavity face outward and the nail caps face inward. The nailing mechanism also includes a nailing wheel and a limiting shell. The nailing wheel is fixed to the outer end face of the nailing roller. The outer circumference of the nailing wheel has multiple locking teeth. The nailing wheel and the nailing roller are located on the same axis. The limiting shell is fixed on the lifting frame. The limiting shell is circular. The nailing roller and the limiting shell are located on the same axis and are rotatable in the limiting shell. The inner side wall of the limiting shell is used to block the outlet of the accommodating cavity, and the bottom of the side wall of the limiting shell has a nailing opening.

2. A plastic mulch laying machine for crop planting according to claim 1, characterized in that: The outer circumference of the covering wheel (9) is provided with a plurality of latch teeth, and the planing board (10) has a bent section at one end close to the outer side in the radial direction of the covering wheel (9).

3. The plastic mulch laying machine for crop planting according to claim 1, characterized in that: The push block (14) has a limiting portion (20), and the bottom wall of the limiting shell (18) has a closed slide (21). The limiting portion (20) is located in the slide (21). The slide (21) includes a straight segment and a curved segment connected in sequence. The straight segment is arranged along the radial direction of the limiting shell (18), and the nailing port (19) is located on the extension line of the straight segment.

4. A plastic mulch laying machine for crop planting according to claim 3, characterized in that: The upper nail assembly is an upper nail tube (22), and the top of the limiting shell (18) is provided with an upper nail opening (23). The upper nail tube (22) is arranged on the top of the limiting shell (18) and is connected to the upper nail opening (23). The upper nail tube (22) is used to accommodate a plurality of fixing nails (16) arranged along a straight line.

5. The plastic mulch laying machine for crop planting according to claim 4, characterized in that: The bottom wall of the accommodating cavity (13) is provided with a magnet (24), and the nail cap of the fixing nail (16) is made of magnetic material.

6. The plastic mulch laying machine for crop planting according to claim 1, characterized in that: It also includes a conveying roller (25) and a guide roller (26), wherein the conveying roller (25) and the guide roller (26) are both rotatably arranged on the frame (1), and the guide rollers (26) are arranged in pairs and are respectively located on both sides of the ridge.

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