Mulching film laying device for tobacco planting

Abstract

The utility model relates to the related technical field of tobacco planting, in particular to a mulching film laying device for tobacco planting, which comprises a main box body, a downward through placing cavity is arranged in the main box body, and first connecting rods which are obliquely arranged are symmetrically arranged at two ends of the middle upper part of one side of the main box body; the sides, away from the main box body, of the two first connecting rods are connected through a holding rod. A mulching film laying mechanism is adopted to conduct mulching film laying operation on soil ridges, mulching films can be effectively pressed to the tops of the soil ridges synchronously through a mulching film pressing rod, then the situation of mulching film laying swelling can be avoided, and the laid mulching films are evenly pricked synchronously through movement of a main box body in a linkage mode to drive a pricking roller, so that the mulching film laying efficiency is improved. Therefore, the situation that the positions of the holes in the two sides of the mulching film do not correspond to each other due to the fact that hard objects such as branches puncture the edge of the mulching film is avoided, and the situation that the sizes of the holes are different, air convection is affected, and the mulching film is broken is avoided synchronously.

Description

Technical Field

[0001] This utility model relates to the technical field of tobacco planting, specifically to a mulch film laying device for tobacco planting. Background Technology

[0002] Tobacco is an annual herbaceous plant belonging to the genus *Nicotiana* in the family Solanaceae. Its leaves are oblong-lanceolate, lanceolate, oblong, or ovate, with an acuminate apex and a gradually narrowed base forming an auricle-like semi-amplexicaul shape. The petioles are inconspicuous or winged. The inflorescence is paniculate; the calyx is tubular or tubular-campanulate with triangular-lanceolate lobes; the corolla is funnel-shaped, pale yellow, pale green, red, or pink, with a yellowish base. The capsule is ovoid or elliptical, nearly as long as the persistent calyx; the seeds are round or broadly oblong, brown. Flowering and fruiting occur in summer and autumn.

[0003] During the transplanting period, tobacco seedlings produced in seedling greenhouses need to be transplanted to the field. Before transplanting, soil ridges need to be built in the field, and after fertilization, mulch film needs to be laid. The mulch film increases soil temperature, maintains soil moisture, promotes seed germination and rapid seedling growth, and suppresses weed growth, thus providing moisture retention and protection for the tobacco seedlings. At the same time, holes need to be made in the mulch film to drain excess water and allow for a small amount of air circulation. The current method of making holes in tobacco mulch film is rather crude, basically requiring tobacco farmers to use hard objects such as branches to poke holes in the edges of the mulch film. This method results in misaligned holes on both sides of the mulch film, and the holes are of different sizes, which not only hinders air convection but may even cause the mulch film to break. Simultaneously, before laying the mulch film, the soil ridges for tobacco planting need to be fertilized row by row manually, which is time-consuming, labor-intensive, and requires a high level of physical exertion. Utility Model Content

[0004] The purpose of this utility model is to provide a mulch film laying device for tobacco planting, addressing the deficiencies and shortcomings of existing technologies.

[0005] This utility model discloses a mulch film laying device for tobacco planting, comprising a main box with a downwardly penetrating placement cavity. Two inclined first connecting rods are symmetrically arranged at both ends of the upper middle part of one side of the main box, and the two first connecting rods are connected by a handle on the side away from the main box. A support arc plate is provided between the bottom of the first connecting rod and the side wall of the main box for support. A fertilization mechanism for applying fertilizer to the tobacco planting ridges is provided on the side of the placement cavity away from the handle. A mulch film laying mechanism for laying mulch film on the fertilized ridges is provided on the side of the placement cavity close to the handle. Symmetrical ridge slope notches are provided on the bottom of both sides of the main box to avoid the height of the ridges.

[0006] Furthermore, the film-laying mechanism includes a stabilizing plate disposed within a roller-changing groove opened at one end face of the main housing, the roller-changing groove being in communication with the mounting cavity; a second connecting plate is provided on the top of the stabilizing plate, the second connecting plate being rotatably connected to the roller-changing groove via a hinge shaft; a second mulch film support shaft is vertically installed on the inner wall of the stabilizing plate; a first mulch film support shaft, corresponding to the position of the second mulch film support shaft, is vertically arranged at one end of the mounting cavity opposite to the stabilizing plate; the first mulch film support shaft and the second mulch film support shaft allow the mulch film roll to be sleeved between them, and the diameters of the first mulch film support shaft and the second mulch film support shaft are smaller than the inner diameter of the central paper tube of the mulch film roll.

[0007] Furthermore, the outer end face of the stabilizing plate is symmetrically provided with sliding grooves arranged along its height direction on both sides, and a first connecting shaft is vertically arranged in the sliding groove; a slider is provided in the sliding groove and is slidably connected to the first connecting shaft; both sliders are connected to a limiting plate, which is slidably connected to the end face of the stabilizing plate; a spring is sleeved on the first connecting shaft, and the spring is located above the slider; L-shaped plates are symmetrically provided on both sides of the roller changing groove at the end wall of the main housing, and the L-shaped plates can engage and limit the limiting plate.

[0008] Furthermore, the film-laying mechanism also includes a film-pressing rod located below one side of the first film support shaft. The two ends of the film-pressing rod are connected to the inner wall of the installation cavity. The middle part of the film-pressing rod is convex upward and concave downward, and the two sides are arranged horizontally. The bottom surface of the middle part of the film-pressing rod is slightly higher than the height of the soil ridge. On the side of the film-pressing rod opposite to the first film support shaft, a first drive shaft is arranged along the width direction of the installation cavity and rotatably connected to it. The first drive shaft is provided with rollers for punching air holes, which are evenly arranged with punching cones on its concentric circumferential surface. One end of the first drive shaft extends out of the main housing and is axially connected to the power output shaft of the motor installed on the end wall of the main housing. The end of the first drive shaft opposite to the motor extends out of the main housing and is equipped with a first pulley.

[0009] Furthermore, the fertilizer application mechanism includes a fertilizer storage box embedded in the top of the main housing. The top surface of the fertilizer storage box has a fertilizer storage cavity, and the top of the fertilizer storage cavity is fitted with a cover plate that snaps onto it. A conical guide groove is formed at the bottom of the fertilizer storage cavity, and a downward-through fertilizer discharge outlet is formed at the bottom of the conical guide groove. A fourth drive shaft is arranged along the width direction at the junction of the conical guide groove and the fertilizer discharge outlet. Both ends of the fourth drive shaft pass through the fertilizer storage box and are connected to the inner wall of the placement cavity. A fertilizer discharge roller, concentric with the fourth drive shaft, is arranged on the shaft section within the conical guide groove. Several sets of fertilizer discharge grooves are arranged in a circular array around the circumference of the fertilizer discharge roller. The length of the fertilizer discharge outlet is slightly greater than the diameter of the fertilizer discharge roller. A fourth pulley, concentric with the fourth drive shaft and located at both ends of the fertilizer storage box, is symmetrically arranged on the fourth drive shaft. A third pulley is installed at the end of the fourth drive shaft corresponding to the first pulley, and the third pulley is connected to the first pulley via a drive belt.

[0010] Furthermore, the bottom of the main box body on the side opposite to the handle is provided with several trenching knives for trenching the soil ridges. The number of trenching knives corresponds to the number of fertilizer discharge grooves opened on the fertilizer discharge roller. The placement cavity is provided with a first placement plate arranged along its width direction. The fertilizer storage box is located between the first placement plate and the trenching knives. The bottom of the first placement plate is provided with several soil covering plates corresponding to the positions of the trenching knives.

[0011] Furthermore, the main housing is symmetrically provided with a second drive shaft at the lower middle part of both ends of the main housing near the handle. One end of the second drive shaft extends out of the main housing and is equipped with a rear walking wheel that is concentric with it. The other end of the second drive shaft opposite to the rear walking wheel extends into the placement cavity and is equipped with a pressing wheel that is concentric with it for pressing the laid mulch film into the soil ridge.

[0012] Furthermore, on the side of the main housing away from the handle, at both ends of the lower part, there are symmetrical third drive shafts that are rotatably connected to it. One end of the third drive shaft extends out of the main housing and is equipped with a front travel wheel. The other end of the third drive shaft, opposite to the front travel wheel, extends into the mounting cavity and is equipped with a second pulley that is concentric with it. The two second pulleys are respectively connected to two fourth pulleys through a drive belt.

[0013] The beneficial effects of this utility model after adopting the above structure are as follows: It uses a film-laying mechanism to lay mulch on the soil ridges, and simultaneously uses a film-pressing rod to effectively press the mulch onto the top of the soil ridges, thus avoiding bulging of the mulch. Simultaneously, the main box moves in a linkage manner to drive the binding roller to evenly punch holes in the laid mulch, thus avoiding the situation where the opening positions on both sides of the mulch are not aligned due to the use of hard objects such as tree branches to puncture the edges of the mulch, and thus simultaneously avoiding the situation where the opening size is different, affecting air convection and causing the mulch to break. Simultaneously, before laying the mulch, the fertilizer-spreading mechanism performs fertilizer-spreading and burying operations on the tobacco planting soil ridges in a linkage manner, ensuring the fertility effect of the tobacco planting soil, and simultaneously avoiding the need for manual fertilization, reducing the labor intensity of the workers. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall internal structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 3 This is the utility model Figure 2 A magnified view of the structure at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the mulch film pressure bar structure in this utility model;

[0019] Figure 5 This is a schematic diagram of the roller structure in this utility model;

[0020] Figure 6 This is a schematic diagram of the fertilizer-spreading mechanism in this utility model;

[0021] Figure 7 This is a schematic diagram of the stabilizing plate structure in this utility model;

[0022] Figure 8 This is a schematic diagram of the L-shaped plate structure in this utility model;

[0023] Explanation of reference numerals in the attached figures:

[0024] Main box body -1; First connecting rod -2; Holding rod -3; Support arc plate -4; Ridge slope notch -5; Installation cavity -6; First drive shaft -7; Binding roller -8; First pulley -9; Motor -10; Mulch film pressure bar -11; First mulch film support shaft -12; Roller changing groove -13; L-shaped plate -14; Trenching knife -15; First installation plate -16; Soil covering plate -17; Stabilizing plate -18; Second mulch film support shaft -19; Slide groove -20; First connecting shaft -21; Spring Spring-22; Slider-23; Limiting plate-24; Second connecting plate-25; Second drive shaft-26; Rear traveling wheel-27; Pressing roller-28; Third drive shaft-29; Front traveling wheel-30; Second pulley-31; Fertilizer storage box-32; Cover plate-33; Fertilizer storage cavity-34; Conical guide groove-35; Fertilizer discharge roller-36; Fertilizer discharge trough-37; Fertilizer discharge outlet-38; Fourth drive shaft-39; Third pulley-40; Fourth pulley-41. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] like Figures 1-8 As shown, the present invention discloses a mulch film laying device for tobacco planting, comprising a main box 1, wherein a downwardly penetrating placement cavity 6 is provided inside the main box 1, and two inclined first connecting rods 2 are symmetrically arranged at both ends of the upper middle part of one side of the main box 1, and the two first connecting rods 2 are connected by a handle 3 on the side away from the main box 1; a support arc plate 4 for support is provided between the bottom of the first connecting rod 2 and the side wall of the main box 1; a fertilization mechanism for fertilizing the tobacco planting ridges is provided on the side of the placement cavity 6 away from the handle 3; a mulch film laying mechanism for laying mulch film on the fertilized ridges is provided on the side of the placement cavity 6 close to the handle 3; and ridge slope gaps 5 are symmetrically opened on the bottom of both sides of the main box 1 to avoid the height of the ridges.

[0028] Furthermore, the film-laying mechanism includes a stabilizing plate 18 disposed within a roller changing groove 13 opened at one end face of the main housing 1, the roller changing groove 13 being in continuous connection with the mounting cavity 6; a second connecting plate 25 is provided on the top of the stabilizing plate 18, the second connecting plate 25 being rotatably connected to the roller changing groove 13 via a hinge; a second mulch film support shaft 19 is vertically installed on the inner wall of the stabilizing plate 18; a first mulch film support shaft 12 is vertically disposed at the end of the mounting cavity 6 opposite to the stabilizing plate 18, corresponding to the position of the second mulch film support shaft 19; the first mulch film support shaft 12 and the second mulch film support shaft 19 allow the mulch film roll to be sleeved between them, and the diameters of the first mulch film support shaft 12 and the second mulch film support shaft 19 are smaller than the inner diameter of the central paper tube of the mulch film roll.

[0029] Furthermore, the outer end face of the stabilizing plate 18 is symmetrically provided with sliding grooves 20 arranged along its height direction on both sides, and a first connecting shaft 21 is vertically arranged in the sliding groove 20; a slider 23 is provided in the sliding groove 20 and is slidably connected to it, and the slider 23 is slidably connected to the first connecting shaft 21; both sliders 23 are connected to the limiting plate 24, and the limiting plate 24 is slidably connected to the end face of the stabilizing plate 18; a spring 22 is sleeved on the first connecting shaft 21, and the spring 22 is located above the slider 23; L-shaped plates 14 are symmetrically arranged on both sides of the roller changing groove 13 at the end wall of the main housing 1, and the L-shaped plates 14 can lock and limit the limiting plate 24.

[0030] Furthermore, the film-laying mechanism also includes a film-pressing rod 11 located below one side of the first film-supporting shaft 12. The two ends of the film-pressing rod 11 are connected to the inner wall of the placement cavity 6. The middle part of the film-pressing rod 11 is convex at the top and concave at the bottom, and the two sides are arranged horizontally. The bottom surface of the middle part of the film-pressing rod 11 is slightly higher than the height of the soil ridge. On the side of the film-pressing rod 11 opposite to the first film-supporting shaft 12, a first transmission shaft 7 is arranged along the width direction of the placement cavity 6 and rotatably connected to it. The first transmission shaft 7 is provided with binding rollers 8, which are evenly arranged with punching cones on its concentric circumferential surface for punching out ventilation holes. One end of the first transmission shaft 7 extends out of the main housing 1 and is axially connected to the power output shaft of the motor 10 located on the end wall of the main housing 1. The end of the first transmission shaft 7 opposite to the motor 10 extends out of the main housing 1 and is equipped with a first pulley 9.

[0031] Furthermore, the fertilizer application mechanism includes a fertilizer storage box 32 embedded in the top of the main housing 1. The fertilizer storage box 32 has a fertilizer storage cavity 34 on its top surface. A cover plate 33 is provided on the top of the fertilizer storage cavity 34 and engages with it. A conical guide groove 35 is provided at the bottom of the fertilizer storage cavity 34, and a downward-through fertilizer discharge outlet 38 is provided at the bottom of the conical guide groove 35. A fourth drive shaft 39, arranged along its width, is provided at the junction of the conical guide groove 35 and the fertilizer discharge outlet 38. Both ends of the fourth drive shaft 39 pass through the fertilizer storage box 32, which is rotatably connected to it, and connect to the inner wall of the placement cavity 6. The fourth drive shaft 39 is provided with a fertilizer discharge roller 36 concentrically mounted on the shaft section within the conical guide groove 35. Several sets of fertilizer discharge grooves 37 arranged in a circular array are provided around the circumference of the fertilizer discharge roller 36. The length of the fertilizer discharge outlet 38 is slightly greater than the diameter of the fertilizer discharge roller 36. The fourth drive shaft 39 is symmetrically provided with fourth pulleys 41 concentrically mounted at both ends of the fertilizer storage box 32. The end of the fourth drive shaft 39 corresponding to the first pulley 9 extends out of the main box 1 and is equipped with a third pulley 40. The third pulley 40 and the first pulley 9 are connected by a transmission belt.

[0032] Furthermore, the bottom of the main box 1 on the side opposite to the handle 3 is provided with a number of trenching knives 15 for trenching the soil ridges. The number of trenching knives 15 corresponds to the number of fertilizer discharge grooves 37 opened on the fertilizer discharge roller 36. The placement cavity 6 is provided with a first placement plate 16 arranged along its width direction. The fertilizer storage box 32 is located between the first placement plate 16 and the trenching knives 15. The bottom of the first placement plate 16 is provided with a number of soil covering plates 17 corresponding to the positions of the trenching knives 15.

[0033] Furthermore, on the side of the main housing 1 that is close to the handle 3, a second drive shaft 26 is symmetrically arranged at the lower middle part of both ends and rotates therewith. One end of the second drive shaft 26 extends out of the main housing 1 and is equipped with a rear walking wheel 27 that is concentric with it. The other end of the second drive shaft 26 that is opposite to the rear walking wheel 27 extends into the placement cavity 6 and is equipped with a pressing wheel 28 that is concentric with it for pressing the laid mulch film into the soil ridge.

[0034] Furthermore, on the side of the main housing 1 away from the handle 3, the lower middle part of both ends is symmetrically provided with a third drive shaft 29 that is rotatably connected to it. One end of the third drive shaft 29 extends out of the main housing 1 and is equipped with a front travel wheel 30. The other end of the third drive shaft 29 opposite to the front travel wheel 30 extends into the mounting cavity 6 and is equipped with a second pulley 31 that is concentric with it. The two second pulleys 31 are respectively connected to two fourth pulleys 41 through a drive belt.

[0035] The following, in conjunction with the accompanying drawings, further elaborates on the usage method and principle of the technical solution in this specific embodiment:

[0036] However, when it is necessary to lay mulch on the tobacco planting ridges, the worker first pulls up the limiting plate 24 so that it passes over the L-shaped plate 14. Then, the worker can rotate the stabilizing plate 18. At this time, the worker can put one end of the new roller wrapped with mulch into the installation cavity 6 through the roller changing groove 13, and respectively put the two ends of the roller on the first mulch support shaft 12 and the second mulch support shaft 19. At this time, the worker gradually presses the stabilizing plate 18 back into the roller changing groove 13 during the installation of the roller. At the same time, the worker pulls up the limiting plate 24 so that its height passes over the L-shaped plate 14. At this time, the spring 22 is compressed and contracted by the slider 23. Then, the limiting plate 24 can be inserted between the two L-shaped plates 14. The reaction force of the spring 22 can help lock the limiting plate 24.

[0037] However, when it is necessary to lay mulch on the soil ridges, the workers pass one end of the mulch through the bottom of the mulch pressing rod 11 and fix it to the soil ridge. Then, the workers start the motor 10. The power output shaft of the motor 10 rotates, driving the first transmission shaft 7 to rotate. The rotation of the first transmission shaft 7 drives the binding roller 8 to punch holes in the laid mulch. Simultaneously, the rotation of the first transmission shaft 7 drives the first pulley 9 to rotate. The rotation of the first pulley 9 drives the third pulley 40 to rotate via the transmission belt. The rotation of the third pulley 40 drives the fourth transmission shaft 39 to rotate. The rotation of the fourth transmission shaft 39 drives the fourth pulley 41 to rotate. The rotation of the two fourth pulleys 41 drives the two second pulleys 31 to rotate via the transmission belt. Then, the third drive shaft 29 drives the front walking wheel 30 to rotate, thereby moving the entire device. During the movement, the trenching knife 15 first performs trenching on the top surface of the soil ridge. Then, as the fourth drive shaft 39 rotates, it drives the fertilizer discharge roller 36 to rotate. The fertilizer discharge groove 37 on the fertilizer discharge roller 36 can evenly discharge the fertilizer particles in the fertilizer storage chamber 34 from the fertilizer discharge outlet 38 and drop them into the corresponding fertilizer trench. Simultaneously, the soil covering plate 17 completes the subsequent soil covering operation, thereby completing the fertilization operation of the land. Simultaneously, during the movement of the main box 1, the film pressing wheel 28 can press the mulch film into the soil to complete the compaction and fixation of both sides of the laid mulch film.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mulch film laying device for tobacco planting, characterized in that: It includes a main box (1), which has a downward through-hole (6) inside. The main box (1) has two inclined first connecting rods (2) symmetrically arranged at both ends of the upper middle part of one side. The two first connecting rods (2) are connected by a handle (3) on the side away from the main box (1). A support arc plate (4) for support is provided between the bottom of the first connecting rod (2) and the side wall of the main box (1). A fertilization mechanism for fertilizing the tobacco planting ridges is provided on the side away from the handle (3) in the placement cavity (6). A film laying mechanism for laying mulch on the fertilized ridges is provided on the side of the placement cavity (6) close to the handle (3). The main box (1) has symmetrical ridge slope gaps (5) on the bottom of both sides to avoid the height of the ridges.

2. The mulch film laying device for tobacco planting according to claim 1, characterized in that: The film-laying mechanism includes a stabilizing plate (18) installed in a roller changing groove (13) at one end of the main housing (1), which is connected to the installation cavity (6); a second connecting plate (25) is provided on the top of the stabilizing plate (18), which is rotatably connected to the roller changing groove (13) through a hinge; a second mulch film support shaft (19) is vertically installed on the inner wall of the stabilizing plate (18); a first mulch film support shaft (12) is vertically installed at one end of the installation cavity (6) opposite to the stabilizing plate (18), corresponding to the position of the second mulch film support shaft (19); the first mulch film support shaft (12) and the second mulch film support shaft (19) can allow the mulch film roll to be sleeved between them, and the diameter of the first mulch film support shaft (12) and the second mulch film support shaft (19) is smaller than the inner diameter of the central paper tube of the mulch film roll.

3. The mulch film laying device for tobacco planting according to claim 2, characterized in that: The outer end face of the stabilizing plate (18) is symmetrically provided with sliding grooves (20) arranged along its height direction. A first connecting shaft (21) is vertically arranged in the sliding groove (20). A slider (23) is provided in the sliding groove (20) and is slidably connected to it. The slider (23) is slidably connected to the first connecting shaft (21). Both sliders (23) are connected to the limiting plate (24). The limiting plate (24) is slidably connected to the end face of the stabilizing plate (18). A spring (22) is sleeved on the first connecting shaft (21). The spring (22) is located above the slider (23). The end wall of the main box (1) is symmetrically provided with L-shaped plates (14) located on both sides of the roller changing groove (13). The L-shaped plates (14) can lock and limit the limiting plate (24).

4. The mulch film laying device for tobacco planting according to claim 3, characterized in that: The film laying mechanism also includes a film pressing rod (11) located below one side of the first film support shaft (12). The two ends of the film pressing rod (11) are connected to the inner wall of the placement cavity (6). The middle part of the film pressing rod (11) is convex at the top and concave at the bottom, and the two sides are arranged horizontally. The bottom surface of the middle part of the film pressing rod (11) is slightly higher than the height of the soil ridge. On the side of the film pressing rod (11) opposite to the first film support shaft (12), a first transmission shaft (7) is arranged along the width direction of the placement cavity (6) and rotatedly connected with it. On the first transmission shaft (7), there are evenly arranged rollers (8) with punching cones for punching out ventilation holes on the circumferential surface concentric with it. One end of the first transmission shaft (7) extends out of the main housing (1) and is axially connected to the power output shaft of the motor (10) placed on the end wall of the main housing (1). The end of the first transmission shaft (7) opposite to the motor (10) extends out of the main housing (1) and is equipped with a first pulley (9).

5. The mulch film laying device for tobacco planting according to claim 4, characterized in that: The fertilizer application mechanism includes a fertilizer storage box (32) embedded in the top of the main body (1). A fertilizer storage cavity (34) is provided on the top surface of the fertilizer storage box (32). A cover plate (33) is provided on the top of the fertilizer storage cavity (34) and engages with it. A conical guide groove (35) is provided at the bottom of the fertilizer storage cavity (34), and a downward-through fertilizer discharge outlet (38) is provided at the bottom of the conical guide groove (35). A fourth drive shaft (39) is arranged along its width direction at the junction of the conical guide groove (35) and the fertilizer discharge outlet (38). Both ends of the fourth drive shaft (39) pass through the fertilizer storage box (32) and are rotatably connected to it, connecting to the inner wall of the placement cavity (6). The fourth drive shaft (39) is provided with a fertilizer discharge roller (36) concentric with it on the shaft section inside the conical guide groove (35). Several sets of fertilizer discharge grooves (37) arranged in a ring array are opened on the circumference of the fertilizer discharge roller (36). The length of the fertilizer discharge outlet (38) is slightly larger than the diameter of the fertilizer discharge roller (36). The fourth drive shaft (39) is symmetrically provided with fourth pulleys (41) concentric with it at both ends of the fertilizer storage box (32). The end of the fourth drive shaft (39) corresponding to the first pulley (9) extends out of the main box (1) and is equipped with a third pulley (40). The third pulley (40) and the first pulley (9) are connected by a transmission belt.

6. The mulch film laying device for tobacco planting according to claim 5, characterized in that: The bottom of the main box (1) opposite to the handle (3) is provided with a number of trenching knives (15) for trenching the soil ridge. The number of trenching knives (15) corresponds to the number of fertilizer discharge grooves (37) opened on the fertilizer discharge roller (36). The placement cavity (6) is provided with a first placement plate (16) arranged along its width direction. The fertilizer storage box (32) is located between the first placement plate (16) and the trenching knives (15). The bottom of the first placement plate (16) is provided with a number of soil covering plates (17) corresponding to the position of the trenching knives (15).

7. The mulch film laying device for tobacco planting according to claim 6, characterized in that: The main housing (1) and the handle (3) are symmetrically provided with a second drive shaft (26) at the lower middle part of both ends of the main housing (1) and rotated with it. One end of the second drive shaft (26) extends out of the main housing (1) and is equipped with a rear walking wheel (27) that is concentric with it. The end of the second drive shaft (26) opposite to the rear walking wheel (27) extends into the placement cavity (6) and is equipped with a pressing wheel (28) that is concentric with it for pressing the laid mulch film into the soil ridge.

8. The mulch film laying device for tobacco planting according to claim 7, characterized in that: The main housing (1) is symmetrically provided with a third drive shaft (29) at the lower middle part of both ends on the side away from the handle (3). One end of the third drive shaft (29) extends out of the main housing (1) and is fitted with a front wheel (30). The other end of the third drive shaft (29) opposite to the front wheel (30) extends into the mounting cavity (6) and is fitted with a second pulley (31) concentric with it. The two second pulleys (31) are respectively connected to two fourth pulleys (41) through a drive belt.

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