A film covering device for cultivating seedlings of apple trees

Abstract

A seedling cultivation film covering device for apple tree planting relates to the technical field of apple seedling cultivation. The device is driven to move as a whole by the rotation of an independently driven spiral wheel, and can be operated independently without the need for traction by other agricultural traction machinery. When performing the film covering operation, the ground film is pressed down to the front end side of the spiral wheel by a spreading wheel frame. When the spiral wheel is pushed forward, the wheel surface close to the inner side of the device body will contact the side of the ground film. Due to the rotation of the spiral wheel, a certain pulling is formed on the ground film, and the ground film can be spread out flat under the pulling action of both sides at the same time to avoid wrinkles in the ground film. Furthermore, due to the downward pressure of the spiral wheel, the ground film can fully contact the ground. The soil covering mechanism at the tail end of the spiral wheel lays the soil layer on the ground film. Before covering the soil, the ground film contacts the ground, which can also ensure that the covering soil layer completely covers the upper part of the ground film, thereby ensuring the covering effect.

Description

Technical Field

[0001] The invention relates to the technical field of apple seedling cultivation, and in particular to a seedling cultivation film covering device used for apple tree planting. Background Art

[0002] In the cultivation of apple seedlings, in order to improve the germination rate and promote the growth quality of seeds after sowing, it is often necessary to use mulching operation. By laying mulch in the grooves where seeds are planted, the mulch is used to cover the seed sowing pits. First, it can reduce the evaporation of water in the soil and maintain the soil temperature to promote the growth of seeds. Second, it can protect the seeds and prevent birds and animals from pecking at the seeds.

[0003] During the laying process, the mulch film must be laid completely flat. Wrinkled mulch film will not only affect the germination rate and growth quality of seeds, but also cause the position of the mulch film to shift during the laying process, affecting the laying effect.

[0004] The existing patent CN118556530A, a sweet sorghum cultivation device and method for saline-alkali land, discloses using a covering mechanism to turn the soil layer to both sides of the ground film to cover the ground film. However, during use, the ground film is rolled from the ground film to the covering mechanism, and the ground film does not completely contact the ground. When the covering mechanism is performing the soil covering operation, the soil layer is easily turned to the lower part of the side of the ground film, which will cause the ground film to be covered unreliably. In addition, during the laying process of the ground film, it cannot be ensured that the ground film is completely flat on the ground after contacting the ground, and the covering effect is not ideal. Summary of the invention

[0005] The problem that the present invention aims to overcome is that when the ground film moves from the ground film roll to the soil covering mechanism, the ground film does not completely contact the ground, which not only affects the covering effect of the soil covering mechanism on both sides of the ground film, but also causes wrinkles in the laying of the ground film. The purpose is to provide a seedling cultivation covering device for apple tree planting.

[0006] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0007] A film covering device for cultivating seedlings of apple trees, comprising: a device body, a spiral wheel, a soil covering mechanism, and a film covering mechanism;

[0008] Support frames are respectively arranged on both sides of the device body, and two spiral wheels are provided, each of which is provided with spiral blades, and the spiral directions of the spiral blades on the two spiral wheels are opposite. The two spiral wheels are respectively installed one by one on the support frames on both sides of the device body, and are respectively driven to rotate by independent driving motors. The soil covering mechanism is located on the support frame at the rear end of the spiral wheel, and the film covering mechanism is located on the device body at the front end of the spiral wheel;

[0009] The film coating mechanism comprises a film rolling roller and a material spreading wheel frame, wherein the film rolling roller is mounted on the device body, the material spreading wheel frame is arranged in a one-to-one correspondence with the spiral wheel, and the material spreading wheel frame is fixed on a support frame at the front end of the spiral wheel.

[0010] Furthermore, the support frame is hingedly mounted on the device body, a slide groove is provided on the side of the support frame, a connecting rod is provided between the two support frames, sliding seats are hingedly mounted on both ends of the connecting rod, the sliding seats are located in the slide groove, a screw rod is threadedly connected to the connecting rod, and the upper end of the screw rod is rotatably mounted on the device body.

[0011] Furthermore, the spiral wheel includes a driving drum and a spiral sleeve, the spiral sleeve is ringed with spiral blades on the outside, the driving drum is rotatably mounted on a support frame, the spiral sleeve is fixedly mounted on the driving drum, and the rear end of the driving drum is connected to the output shaft of the driving motor.

[0012] Furthermore, a material-discharging outer cylinder is installed at the front end of the driving drum, and scraper plates are arranged in an array at equal angles on the side walls of the material-discharging outer cylinder.

[0013] Furthermore, a supporting sleeve is fixedly installed on the supporting frame at the front end of the spiral sleeve, the driving rotating cylinder passes through the supporting sleeve, and a material-discharging inner cylinder is fixed on the end of the supporting sleeve, the material-discharging inner cylinder is located inside the material-discharging outer cylinder, a feeding port is provided on the side wall of the material-discharging outer cylinder, the feeding port and the scraper plate are arranged one-to-one, the scraper plate is located on one side of the feeding port, the scraper plate and the cross-section of the side wall of the material-discharging outer cylinder form an angle, and the angle opening faces the inside of the device body, a lifting plate is provided between the material-discharging outer cylinder and the material-discharging inner cylinder, the lifting plate is fixed on the inner wall of the material-discharging outer cylinder, a first material guide port is provided on the upper outer side of the material-discharging inner cylinder, and a second material guide port is provided on the driving rotating cylinder located at the material-discharging inner cylinder, and the tail end of the driving rotating cylinder is connected to a covering mechanism.

[0014] Furthermore, the material shifting outer cylinder, the material shifting inner cylinder and the driving rotary cylinder are arranged on equal axes.

[0015] Furthermore, the plane where the lifting plates are located passes through the axis of the material-shifting inner cylinder, the lifting plates are fixed on the side wall of the material-shifting outer cylinder in an equiangular matrix, and the feed port is located between two adjacent lifting plates.

[0016] Furthermore, a material guide plate is fixedly installed at the second material guide port.

[0017] Furthermore, the driving drum is located inside the spiral sleeve and is a double-layer sleeve structure. The inner tube is a screen structure, and a gap is left between the outer tube and the inner tube. The soil covering mechanism includes a soil covering inner tube and a soil covering outer tube. The inner tube is connected to the soil covering inner tube, and a slag discharge channel is provided on the side wall of the soil covering inner tube. The outer tube is connected to the soil covering outer tube, and a soil covering discharge channel is provided on the side wall of the soil covering outer tube. The port of the soil covering discharge channel faces the device body, and the port of the slag discharge channel is away from the device body.

[0018] Furthermore, the inner tube and the outer tube are both bucket-shaped structures, and the inner diameter of the end facing the soil covering mechanism is larger than the inner diameter of the end away from the soil covering mechanism.

[0019] The beneficial effects of the present invention are:

[0020] The independently driven spiral wheel is rotated to drive the whole device to move, and it can operate independently without the need for other agricultural traction machinery for traction. When performing film covering operation, the ground film is pressed down to the front end side of the spiral wheel by the material spreading wheel frame. When the spiral wheel is pushed forward, the wheel surface close to the inner side of the device body will contact the side of the ground film. Due to the rotation of the spiral wheel, a certain pulling will be formed on the ground film, and the ground film can be spread out flat under the pulling action of both sides at the same time to avoid wrinkles in the ground film. Furthermore, due to the downward pressure of the spiral wheel, the ground film can fully contact the ground. The covering mechanism at the tail end of the spiral wheel lays the soil layer on the ground film. Before covering the soil, the ground film contacts the ground, which can also ensure that the covering soil layer completely covers the upper part of the ground film, thereby ensuring the covering effect.

[0021] By installing a material-discharging outer cylinder on the driving drum at the front end of the spiral wheel, the material-discharging outer cylinder can rotate together with the spiral wheel. Then, at the front of the spiral wheel's travel path, the rotation of the material-discharging outer cylinder can drive the scraper plate thereon to scrape the ground, scraping part of the soil layer into the interior of the material-discharging outer cylinder, and leaving an arc groove in the path. The side of the ground film can fall into the arc groove during the laying process, avoiding the edge of the ground film from warping, which is convenient for the subsequent soil covering operation. Moreover, the arc groove fits the outer wheel surface of the spiral wheel better, preventing the spiral wheel from deviating during the travel process.

[0022] The soil material dug out by the scraper plate on the outer cylinder of the material discharging device is guided by the driving drum and filtered by the screen on the inner tube of the driving drum. The larger slag in the soil will be filtered out, and the filtered soil will flow into the soil-covering outer cylinder from the outer tube and be discharged onto the ground film through the soil covering discharge channel on the soil covering outer cylinder, while the filtered slag will be discharged from the slag discharge channel on the inner tube to the side away from the device body, so as to prevent the larger slag in the soil layer from damaging the ground film during the soil covering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3 It is a rear view of the present invention;

[0026] Figure 4 It is a schematic diagram of the installation of the material shifting outer cylinder and the material shifting outer cylinder of the present invention;

[0027] Figure 5It is a vertical axial section view of the material shifting outer cylinder and the material shifting outer cylinder of the present invention;

[0028] Figure 6 It is a schematic diagram of the connection between the spiral wheel and the soil covering mechanism of the present invention;

[0029] Figure 7 It is a schematic cross-sectional view of the soil covering mechanism of the present invention.

[0030] In the figure: 1. device body; 2. spiral wheel; 3. soil covering mechanism; 4. film covering mechanism; 11. support frame; 12. film rolling roller; 13. material spreading wheel frame; 101. first telescopic rod; 102. second telescopic rod; 103. guide wheel; 21. slide groove; 22. connecting rod; 23. slide seat; 24. screw; 31. driving drum; 32. spiral sleeve; 33. spiral blade; 34. driving motor; 41. supporting sleeve; 42. material discharging outer cylinder; 43. feeding port; 44. scraper plate; 45. material discharging inner cylinder; 46. lifting plate; 47. first material guiding port; 48. second material guiding port; 49. guiding plate; 51. inner layer tube; 52. outer layer tube; 53. soil covering inner cylinder; 54. soil covering outer cylinder; 55. soil covering discharge channel; 56. slag stone discharge channel. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0032] like Figure 1-2 As shown; a film covering device for cultivating seedlings of apple trees, comprising: a device body 1, a spiral wheel 2, a soil covering mechanism 3, and a film covering mechanism 4;

[0033] Support frames 11 are respectively arranged on both sides of the device body 1, two spiral wheels 2 are arranged, and spiral blades 33 are respectively arranged on each spiral wheel 2. The spiral directions of the spiral blades 33 on the two spiral wheels 2 are opposite. The two spiral wheels 2 are respectively installed one by one on the support frames 11 on both sides of the device body 1, and are respectively driven to rotate by independent driving motors 34. The soil covering mechanism 3 is located on the support frame 11 at the rear end of the spiral wheel 2, and the film covering mechanism 4 is located on the device body 1 at the front end of the spiral wheel 2;

[0034] The film coating mechanism 4 includes a film rolling roller 12 and a material spreading wheel frame 13. The film rolling roller 12 is installed on the device body 1. The material spreading wheel frame 13 is arranged one-to-one corresponding to the spiral wheel 2. The material spreading wheel frame 13 is fixed on the support frame 11 at the front end of the spiral wheel 2.

[0035] The paving wheel frame 13 includes a first telescopic rod 101, a second telescopic rod 102, and a guide wheel 103. The support parts of the first telescopic rod 101 and the second telescopic rod 102 are respectively hinged on the support frame 11, and the output end of the second telescopic rod 102 is hinged on the support part of the first telescopic rod 101. The guide wheel 103 is installed at the output end of the first telescopic rod 101. The wheel surfaces of the guide wheels 103 located on both sides of the device body 1 form an angle of 90 degrees, and the angle opens toward the soil covering mechanism 3. By adjusting the length of the output ends of the first telescopic rod 101 and the second telescopic rod 102, the distance between the guide wheel 103 and the spiral wheel 2 and the ground is controlled. When the ground film on the side of the spiral wheel 2 of the guide wheel 103 passes through the guide wheel 103, the ground film can be unfolded on both sides under the guidance of the guide wheel 103;

[0036] Before covering the film, level both sides of the trench to be covered, loosen the soil, refine the soil particles, clean up the larger visible stones in the soil, and cover the film when the soil is relatively dry;

[0037] The two spiral wheels 2 are driven by their own independent driving motors. When the cultivated land needs to be covered with film, the driving motor drives the two spiral wheels 2 to rotate at the same speed and in opposite directions. The spiral wheels 2 move from the outside of the device body 1 to the inside of the device body 1, and rotate from the top to the bottom (the left spiral wheel 2 rotates clockwise, and the right spiral wheel 2 rotates counterclockwise). The spiral wheels 2 contact the ground, and under the push of the spiral blades outside the spiral wheels 2, the spiral wheels 2 and the device body 1 move forward as a whole. The ground film roll is installed on the film rolling roller 12, and the ground film is pulled by the film rolling roller 12. The mulch film is spread out and guided by the spreading wheel frame 13 at the front end of the spiral wheel 2. The side of the mulch film contacts the outer side of the spiral wheel 2. The rotation of the spiral wheel 2 will generate a certain pulling force on the side of the mulch film due to friction. Under the pulling of the spiral wheels 2 on both sides, the mulch film can be spread out flat, and due to the pressure of the spiral wheel 2 on both sides of the mulch film, it is also ensured that the mulch film is completely covered on the ground. As the spiral wheel 2 rotates and advances, the covering mechanism 3 at the tail of the spiral wheel 2 can cover the soil layer on the mulch film. Before the covering mechanism 3 performs the covering operation, the mulch film has been completely in contact with the ground, which greatly improves the covering effect.

[0038] Based on Example 1, during the film covering process, due to the difference in the width of the drainage ditch, different widths of the film may be selected. In order to adapt to the changes in the film of different widths, for example Figure 1-3 As shown, the support frame 11 is hingedly mounted on the device body 1, a slide groove 21 is provided on the side of the support frame 11, a connecting rod 22 is provided between the two support frames 11, and a slide seat 23 is hingedly mounted at both ends of the connecting rod 22. The slide seat 23 is located in the slide groove 21, and a screw rod 24 is connected to the connecting rod 22 by a thread, and the upper end of the screw rod 24 is rotatably mounted on the device body 1;

[0039] When the width of the ground film changes, the screw rod 24 can be rotated to push the connecting rod 22 up and down, and the up and down movement of the connecting rod 22 will change the angle between the support frames 11 on both sides of the device body 1. When the angle increases, the distance between the two spiral wheels 2 increases, and when the angle decreases, the distance between the two spiral wheels 2 decreases. Therefore, when responding to a production environment in which the width of the ground film changes, film can also be covered;

[0040] Furthermore, by adjusting the spacing between the spiral wheels 2, the contact area between the spiral wheels 2 and the edge of the ground film can be adjusted, that is, ensuring that the spiral wheels 2 can contact the edge of the ground film and preventing the spiral wheels 2 from being completely compacted on the ground film.

[0041] Based on Example 1, the soil layers on both sides of the ground film may be uneven. When laying the ground film, the uneven soil surface will cause a gap to form between the side of the ground film and the ground, which will affect the laying effect of the ground film. To solve the above problem, Figure 1-5 As shown, the spiral wheel 2 is designed to include a driving drum 31 and a spiral sleeve 32. The spiral sleeve 32 is ringed with spiral leaves 33 on the outside. The driving drum 31 is rotatably mounted on the support frame 11. The spiral sleeve 32 is fixedly sleeved on the outside of the driving drum 31. The tail end of the driving drum 31 is connected to the output shaft of the driving motor 34.

[0042] A material-discharging outer cylinder 42 is installed at the front end of the driving drum 31, and a scraper plate 44 is arranged in an array at an equal angle on the side wall of the material-discharging outer cylinder 42;

[0043] The driving drum 31 is driven to rotate by the driving motor 34, and the driving drum 31 drives the material-discharging outer cylinder 42 to rotate synchronously with the spiral sleeve 32, so that the material-discharging outer cylinder 42 rotates in front of the travel path of the spiral wheel 2. The rotation of the material-discharging outer cylinder 42 drives the scraper plate 44 to scrape the ground, and a uniform arc-shaped groove surface is formed on the movement path of the spiral wheel 2. When the ground film is pressed down by the spiral wheel 2, the edge of the ground film will be pressed into the arc-shaped groove surface, which is more conducive to the fit between the edge of the ground film and the ground. When the subsequent soil covering operation is performed, it is also convenient to bury the edge of the ground film in the lower part of the soil layer. During the whole process, the scraper plate 44 is used to uniformly organize the ground into an arc surface, reduce the height difference of the ground, and reduce the gap between the edge of the ground film and the ground.

[0044] A support sleeve 41 is fixedly mounted on the support frame 11 at the front end of the spiral sleeve 32, and the driving drum 31 passes through the support sleeve 41. A material-pickling inner cylinder 45 is fixed to the end of the support sleeve 41. The material-pickling inner cylinder 45 is located inside the material-pickling outer cylinder 42. A feed port 43 is provided on the side wall of the material-pickling outer cylinder 42. The feed port 43 is arranged one-to-one with a scraper plate 44. The scraper plate 44 is located on one side of the feed port 43. The scraper plate 44 forms an angle with the cross section of the side wall of the material-pickling outer cylinder 42. , the angle opening faces the inner side of the device body 1, the scraper plate 44 is inserted into the ground to dig out the soil, and will enter the material-pickup outer cylinder 42 through the feed port 43, a lifting plate 46 is provided between the material-pickup outer cylinder 42 and the material-pickup inner cylinder 45, the lifting plate 46 is fixed on the inner side wall of the material-pickup outer cylinder 42, a first material guide port 47 is provided on the upper outer side of the material-pickup inner cylinder 45, a second material guide port 48 is provided on the driving drum 31 located at the material-pickup inner cylinder 45, and the tail end of the driving drum 31 is connected to the soil covering mechanism 3;

[0045] The material-dispensing outer cylinder 42, the material-dispensing inner cylinder 45, and the driving rotating cylinder 31 are arranged with equal axes, so as to ensure that the three can rotate coaxially;

[0046] The plane where the lifting plates 46 are located passes through the axis of the material-discharging inner cylinder 45. The lifting plates 46 are fixed in a matrix manner at equal angles on the side wall of the material-discharging outer cylinder 42. The feed port 43 is located between two adjacent lifting plates 46.

[0047] A guide plate 49 is fixedly installed at the second guide opening 48. When the driving drum 31 rotates, the guide plate 49 rotates along with the driving drum 31, and its side scrapes the inner wall of the material-diverting inner drum 45, so that the soil in the material-diverting inner drum 45 is introduced into the driving drum 31 through the second guide opening 48, thereby improving the efficiency of the soil in the material-diverting inner drum 45 entering the driving drum 31.

[0048] The soil dug out by the scraper plate 44 can enter the material-discharging outer cylinder 42 through the feed port 43. As the material-discharging outer cylinder 42 rotates, the lifting plate 46 inside it will lift the soil to the first material guide port 47 on the upper part of the material-discharging inner cylinder 45. As the driving drum 31 rotates in the material-discharging inner cylinder 45, the guide plate 49 at the second material guide port 48 on the material-discharging inner cylinder 45 will scrape the soil into the driving drum 31, and guided by the driving drum 31, the soil is discharged from the soil covering mechanism 3 at the tail of the spiral wheel 2 to perform the soil covering operation on the ground film.

[0049] On the basis of Example 3, during the covering process, the soil contains large slag stones, which fall onto the ground film and pierce the ground film, causing the ground film to be damaged. In order to solve the above technical problems, Figure 1-7As shown, the driving drum 31 is located inside the spiral sleeve 32 and is designed as a double-layer sleeve structure, the inner tube 51 is a screen structure, and a gap is left between the outer tube 52 and the inner tube 51. The soil covering mechanism 3 includes a soil covering inner tube 53 and a soil covering outer tube 54. The inner tube 51 is connected to the soil covering inner tube 53, and a slag discharge channel 56 is provided on the side wall of the soil covering inner tube 53. The outer tube 52 is connected to the soil covering outer tube 54, and a soil covering discharge channel 55 is provided on the side wall of the soil covering outer tube 54. The end of the soil covering discharge channel 55 faces the device body 1, and the end of the slag discharge channel 56 is away from the device body 1.

[0050] The soil excavated by the scraper on the material-discharging outer cylinder 42 enters the driving drum 31 through the material-discharging inner cylinder 45, and moves from the front end of the driving drum 31 to the rear end of the driving drum 31. When passing through the double-layer casing structure, it is filtered by the screen on the inner tube 51. Some of the slag with larger particle size will be retained in the inner tube 51, while the soil with smaller particle size can pass through the screen and enter the outer tube 52. The slag in the inner tube 51 moves to the soil-covering inner cylinder 53 and is discharged to the outside of the device body 1 through the slag discharge channel 56, while the slag in the outer tube 52 moves to the soil-covering outer cylinder 54 and is discharged to the upper part of the ground film through the soil-covering discharge channel 55. During the film covering process, the soil used for film covering can be filtered to prevent the larger slag in the soil from damaging the ground film.

[0051] The inner tube 51 and the outer tube 52 are both bucket-shaped structures, and the inner diameter of the end facing the soil covering mechanism 3 is larger than the inner diameter of the end away from the soil covering mechanism 3;

[0052] As the driving drum 31 rotates, the soil that enters the driving drum 31 will be accelerated to move along the bucket-shaped side walls of the inner tube 51 and the outer tube 52 under the action of centrifugal force, and will move quickly from the end with a smaller inner diameter to the end with a larger inner diameter, thereby improving the passing efficiency of the soil in the driving drum 31.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A film covering device for cultivating seedlings of apple trees, characterized in that: include: Device body, spiral wheel, soil covering mechanism, film covering mechanism; Support frames are respectively arranged on both sides of the device body, and two spiral wheels are provided, each of which is provided with spiral blades, and the spiral directions of the spiral blades on the two spiral wheels are opposite. The two spiral wheels are respectively installed one by one on the support frames on both sides of the device body, and are respectively driven to rotate by independent driving motors. The soil covering mechanism is located on the support frame at the rear end of the spiral wheel, and the film covering mechanism is located on the device body at the front end of the spiral wheel; The film coating mechanism comprises a film rolling roller and a material spreading wheel frame, wherein the film rolling roller is mounted on the device body, the material spreading wheel frame is arranged in a one-to-one correspondence with the spiral wheel, and the material spreading wheel frame is fixed on a support frame at the front end of the spiral wheel; The spiral wheel comprises a driving drum and a spiral sleeve. The spiral sleeve is ringed with spiral blades on the outside. The driving drum is rotatably mounted on a support frame. The spiral sleeve is fixedly sleeved on the driving drum. The rear end of the driving drum is connected to the output shaft of the driving motor. A material-discharging outer cylinder is installed at the front end of the driving drum, and scrapers are arranged in an array at equal angles on the side wall of the material-discharging outer cylinder; A supporting sleeve is fixedly installed on the supporting frame at the front end of the spiral sleeve, and the driving rotating cylinder passes through the supporting sleeve, and a material-discharging inner cylinder is fixed on the end of the supporting sleeve, and the material-discharging inner cylinder is located inside the material-discharging outer cylinder. A feeding port is provided on the side wall of the material-discharging outer cylinder, and the feeding port and the scraper plate are arranged one-to-one. The scraper plate is located on one side of the feeding port, and the scraper plate and the side wall section of the material-discharging outer cylinder form an angle, and the angle opening faces the inside of the device body, and a lifting plate is provided between the material-discharging outer cylinder and the material-discharging inner cylinder, and the lifting plate is fixed on the inner wall of the material-discharging outer cylinder, a first material guide port is provided on the upper outer side of the material-discharging inner cylinder, and a second material guide port is provided on the driving rotating cylinder located at the material-discharging inner cylinder, and the tail end of the driving rotating cylinder is connected to a covering mechanism.

2. A film covering device for cultivating seedlings of apple trees according to claim 1, characterized in that: The support frame is hingedly installed on the device body, and a slide groove is provided on the side of the support frame. A connecting rod is provided between the two support frames. Slide seats are hingedly installed at both ends of the connecting rod, and the slide seat is located in the slide groove. A screw rod is connected to the connecting rod through a thread, and the upper end of the screw rod is rotatably installed on the device body.

3. The film covering device for cultivating seedlings of apple trees according to claim 1, characterized in that: The material shifting outer cylinder, the material shifting inner cylinder and the driving rotating cylinder are arranged on the same axis.

4. The film covering device for cultivating seedlings of apple trees according to claim 1, characterized in that: The plane where the lifting plates are located passes through the axis of the material-shifting inner cylinder. The lifting plates are fixed on the side wall of the material-shifting outer cylinder in an equiangular matrix. The feed port is located between two adjacent lifting plates.

5. The film covering device for cultivating seedlings of apple trees according to claim 1, characterized in that: A material guiding plate is fixedly installed at the second material guiding port.

6. The film covering device for cultivating seedlings of apple trees according to claim 1, characterized in that: The driving drum is located inside the spiral sleeve and is a double-layer sleeve structure. The inner tube is a screen structure, and a gap is left between the outer tube and the inner tube. The soil covering mechanism includes a soil covering inner tube and a soil covering outer tube. The inner tube is connected to the soil covering inner tube, and a slag discharge channel is provided on the side wall of the soil covering inner tube. The outer tube is connected to the soil covering outer tube, and a soil covering discharge channel is provided on the side wall of the soil covering outer tube. The soil covering discharge channel port faces the device body, and the slag discharge channel port is away from the device body.

7. A film covering device for cultivating seedlings of apple trees according to claim 6, characterized in that: The inner layer tube and the outer layer tube are both bucket-shaped structures, and the inner diameter of the end facing the soil covering mechanism is larger than the inner diameter of the end away from the soil covering mechanism.

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