Film mulching device

Abstract

This invention relates to a soil covering device for membranes, designed to address the problem of inconsistent soil coverage caused by uneven soil delivery from the soil covering pan to the soil covering cylinder in existing membrane covering equipment. The device includes a frame and a membrane roller, a soil covering pan, and a soil covering cylinder mounted on the frame. The soil covering pan is positioned on the feed side of the soil covering cylinder and is inclined along the traveling direction of the frame. A conveying assembly is located between the soil covering cylinder and the soil covering pan. This assembly includes a conveying cylinder, a conveying shaft, and a conveying drive mechanism. The lower side wall of the conveying cylinder has a feed hopper. The conveying shaft is rotatably mounted inside the conveying cylinder, and helical blades are fixed to the conveying shaft inside the cylinder. The conveying drive mechanism drives the rotation of the conveying shaft. The soil covering cylinder has an inclined bottom, the lower end of which communicates with a discharge hole on the cylinder. This invention, through the arrangement of the conveying assembly, ensures uniform soil delivery into the soil covering cylinder, guaranteeing consistent soil coverage.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a soil covering device for film. Background Technology

[0002] To ensure proper peanut germination, peanuts need to be covered with plastic film during sowing, and then covered with soil. Existing film-covering equipment has the following structure: Figure 1 , Figure 2 As shown, the system includes a frame 1, a film roller 2, a covering pan 3, and a covering cylinder 4. The film roller 2, covering pan 3, and covering cylinder 4 are all mounted on the frame 1, and a roll of mulch film is installed on the film roller 2. When the frame 1 moves, the covering pan 3 scrapes the ground soil into the covering cylinder 4. After the soil is removed from the covering cylinder 4, it falls onto the mulch film, thus achieving soil covering. The existing soil covering equipment has the following drawbacks: the distance between the covering pan 3 and the covering cylinder 4, the tilt angle of the covering pan 3, and the flatness of the ground all affect the amount of soil covered in the covering cylinder 4. If the distance between the covering pan 3 and the covering cylinder 4 is too large or the tilt angle of the covering pan 3 is too small, the amount of soil loosened by the covering pan 3 into the covering cylinder 4 is small, resulting in a small amount of soil covered. If the distance between the covering pan 3 and the covering cylinder 4 is too small or the tilt angle of the covering pan 3 is too large, the amount of soil loosened by the covering pan 3 into the covering cylinder 4 is large, resulting in a large amount of soil covered. In areas of ground depression, insufficient soil scraping by the covering pan results in a smaller amount of soil being covered, or even no soil covering at all. In areas of ground elevation, a larger amount of soil scraping by the covering pan results in a larger amount of soil being covered, thus leading to inconsistent soil covering amounts. Summary of the Invention

[0003] The purpose of this invention is to provide a soil covering device for membranes, which solves the problem of inconsistent soil covering amount caused by uneven soil feeding from the soil covering plate into the soil covering cylinder in existing soil covering equipment.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a film covering soil device, including a frame and a film roller, a soil covering disc, and a soil covering cylinder arranged on the frame. The soil covering disc is arranged on the feeding side of the soil covering cylinder and is inclined along the traveling direction of the frame. A conveying assembly is provided between the soil covering cylinder and the soil covering disc. The conveying assembly includes a conveying cylinder, a conveying shaft, and a conveying drive mechanism. The lower side wall of the conveying cylinder has a feeding hopper. The top of the feeding hopper and the end facing the soil covering disc are open to form a feeding port. The conveying shaft is rotatably arranged inside the conveying cylinder. A spiral blade is fixed on the conveying shaft located inside the conveying cylinder. The conveying drive mechanism is connected to the conveying shaft outside the conveying cylinder to drive the rotation of the conveying shaft. The upper side wall of the conveying cylinder has a discharge port communicating with the soil covering cylinder. The soil covering cylinder has an inclined bottom. The upper end of the inclined bottom is connected to the discharge port, and the lower end of the inclined bottom is connected to the discharge hole on the soil covering cylinder.

[0005] Furthermore, the feed hopper has a conical structure, with its small end fixedly connected to the conveying cylinder and its large end facing the soil covering plate.

[0006] Furthermore, the conveying drive mechanism includes a driven wheel, a driving wheel, and a transmission component. The driven wheel is fixed on a conveying shaft outside the conveying cylinder, the driving wheel is rotatably connected to the frame, and the transmission component connects the driving wheel and the driven wheel together.

[0007] Furthermore, the conveying cylinder is fixedly connected to the covering cylinder.

[0008] Furthermore, the covering cylinder is rotatably connected to the conveying cylinder, the covering cylinder is small at both ends and large in the middle, and there is a transmission mechanism between the conveying shaft and the covering cylinder, under the action of the transmission mechanism the conveying shaft and the covering cylinder rotate simultaneously.

[0009] Furthermore, the transmission mechanism includes a driven gear, a driving gear, and a transmission box. The driving gear and the driving wheel are rotatably mounted on the transmission box, the driven gear is fixed on the soil covering cylinder, the driving gear meshes with the driven gear, and there is a reversing mechanism between the driving gear and the driving wheel.

[0010] Furthermore, the reversing mechanism includes a first transmission gear, a second transmission gear, a worm gear, and a worm located within the transmission box. The first transmission gear is coaxially arranged with the driving gear, the second transmission gear is coaxially arranged with the worm and meshes with the first transmission gear, and the worm gear is coaxially arranged with the driving gear and meshes with the worm.

[0011] Furthermore, the covering cylinder has an inverted triangular structure, and the bottom of the covering cylinder has a measuring cylinder. The discharge hole is located at the bottom of the measuring cylinder. The discharge hole has several baffles. The baffles are hinged to the inner wall of the discharge hole and a torsion spring is provided between them. When the torsion spring has zero deformation, the baffles will block the discharge hole. The covering cylinder has an unloading component that moves from top to bottom to push the soil in the measuring cylinder out.

[0012] Furthermore, the unloading assembly includes a slider and an unloading drive mechanism. The slider is slidably disposed inside the covering cylinder. The bottom of the slider has a pressure rod and pressure pins located around the pressure rod. The unloading drive mechanism drives the slider to move up and down reciprocally.

[0013] Furthermore, the unloading drive mechanism includes a main shaft, a first bevel gear, a second bevel gear, and a connecting rod. The main shaft is rotatably mounted on the top of the covering cylinder. The first bevel gear is fixed to the lower part of the main shaft. The second bevel gear is rotatably mounted inside the covering cylinder and meshes with the first bevel gear. The upper end of the connecting rod is hinged to the second bevel gear, and the lower end of the connecting rod is hinged to the slider.

[0014] The beneficial effects of this invention are as follows: By configuring the conveying assembly, the soil scraped by the covering pan is evenly transported into the covering cylinder, thus avoiding inconsistent covering amounts caused by varying amounts of soil entering the covering cylinder. The covering amount can be adjusted by regulating the rotational speed of the conveying shaft. The bottom of the covering cylinder has an inclined bottom, allowing the soil entering the covering cylinder to slide along the inclined bottom under its own weight to the discharge hole, achieving soil covering of the mulch film. Furthermore, the soil moves within the closed environment formed by the feed hopper, conveying cylinder, and covering cylinder, preventing dust generation. Attached Figure Description

[0015] Figure 1 This is a top view of a membrane-covering soil device in the prior art;

[0016] Figure 2 This is a front view of a membrane-covering soil device in the prior art;

[0017] Figure 3 This is a three-dimensional assembly diagram of the conveying component and the covering cylinder according to Embodiment 1 of the present invention;

[0018] Figure 4 for Figure 3 The main view;

[0019] Figure 5 for Figure 3 Top view;

[0020] Figure 6 for Figure 3 The left view;

[0021] Figure 7 for Figure 3 A sectional view;

[0022] Figure 8 A front view showing the installation of a transmission mechanism between the conveyor shaft and the soil covering cylinder, based on Embodiment 1;

[0023] Figure 9 This is a top view of the linked components;

[0024] Figure 10 This is a top view of the working principle of Embodiment 1 of the present invention;

[0025] Figure 11 This is a front view of an embodiment of the present invention, showing an unloading component installed on a soil-covering cylinder.

[0026] Figure 12 This is a top view of an embodiment of the present invention, showing an unloading component installed on a soil-covering cylinder;

[0027] Figure 13 This is a schematic diagram of the internal structure of the soil covering cylinder according to Embodiment 2 of the present invention;

[0028] Figure 14This is a rear view of the unloading component according to Embodiment 2 of the present invention;

[0029] Figure 15 for Figure 13 A partial view in the middle;

[0030] Figure 16 A schematic diagram showing the movement of soil inside the cover cylinder;

[0031] Figure 17 A top view showing the inner baffle of the backfill opening open;

[0032] Figure 18 This is a three-dimensional assembly diagram of the conveying component and the covering cylinder according to Embodiment 3 of the present invention;

[0033] Figure 19 This is a three-dimensional assembly diagram of the conveying component and the covering cylinder according to Embodiment 4 of the present invention;

[0034] In the diagram: 1. Frame, 2. Film roller, 3. Covering disc, 4. Covering cylinder, 41. Discharge hole, 42. Inclined bottom, 43. Measuring cylinder, 44. Baffle, 5. Conveying cylinder, 51. Feed hopper, 52. Feed inlet, 53. Lower flange, 54. Upper flange, 55. Conveying shaft, 56. Bearing, 57. Bolt assembly, 58. Spiral blade, 59. Discharge port, 6. Linkage assembly, 61. Driven wheel, 62. Driving wheel, 63. Driven gear, 64. Driving gear, 65. Transmission box, 66. Reversing mechanism, 661. First transmission gear, 662. Second transmission gear, 663. Worm, 664. Worm wheel, 67. Transmission component, 68. Tensioning wheel, 7. Soil, 8. Main shaft, 81. First bevel gear, 82. Second bevel gear, 83. Connecting rod, 84. Slider, 85. Pressing needle, 86. Pressing rod. Detailed Implementation

[0035] The structure and working principle of various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Example 1:

[0037] like Figures 3 to 17 As shown, the present invention includes a frame 1, a plastic film roller 2, a soil covering disc 3, a soil covering cylinder 4, and a conveying assembly. The plastic film roller 2, the soil covering disc 3, and the soil covering cylinder 4 are all mounted on the frame 1. The plastic film roller 2 is fixedly or rotatably connected to the frame 1, the soil covering disc 3 is rotatably connected to the frame 1, and the soil covering cylinder 4 is fixedly connected to the frame 1. The soil covering disc 3 is located on the feeding side of the soil covering cylinder 4 and is inclined along the traveling direction of the frame 1. During the movement of the frame 1, the soil covering disc 3 scrapes up the soil on the ground and pushes it towards the side where the soil covering cylinder 4 is located.

[0038] like Figures 3 to 6As shown, a conveying assembly is provided between the covering cylinder 4 and the covering pan 3. The conveying assembly includes a conveying cylinder 5, a conveying shaft 55, and a conveying drive mechanism. The lower side wall of the conveying cylinder 5 has a feed hopper 51. The top of the feed hopper 51 and the end facing the covering pan 3 are open, forming a feed inlet 52. The wide feed inlet 52 facilitates soil entry into the feed hopper 51. The conveying shaft 55 is rotatably mounted inside the conveying cylinder 5. A helical blade 58 is fixed on the conveying shaft 55 located inside the conveying cylinder 5. The conveying drive mechanism is connected to the conveying shaft 55 outside the conveying cylinder 5 to drive the rotation of the conveying shaft 55. Figure 7 As shown, the upper side wall of the conveying cylinder 5 has a discharge port 59 that communicates with the covering cylinder 4. Figure 10 As shown, the covering disc 3 scrapes up and pushes the soil towards the feed hopper 51. The soil in the feed hopper 51 moves upwards under the action of the spiral blades 58, and then enters the covering cylinder 4 through the discharge port 59. The conveying assembly enables the transfer and conveying of soil between the covering disc 3 and the covering cylinder 4. Figure 4 As shown, the covering cylinder 4 has an inclined bottom 42. The upper end of the inclined bottom 42 is connected to the discharge port 59, and the lower end of the inclined bottom 42 is connected to the discharge hole 41 on the covering cylinder 4. The soil entering the covering cylinder 4 slides down the inclined bottom 42 and is finally discharged through the discharge hole 41 to cover the mulch film.

[0039] To facilitate the entry of soil into the feed hopper 51, such as Figure 3 , Figure 5 As shown, the feed hopper 51 has a conical structure. The small end of the feed hopper 51 is fixedly connected to the conveying cylinder 5, and the large end of the feed hopper 51 faces the covering plate 3. At the same time, the top of the feed hopper 51 and the side facing the covering plate 3 are open, so the soil scraped by the covering plate 3 can easily enter the feed hopper 51.

[0040] like Figure 8 As shown, the conveying drive mechanism includes a driven wheel 61, a driving wheel 62, and a transmission component 67. The driven wheel 62 is fixed to the conveying shaft 55 outside the conveying cylinder 5. The driving wheel 62 is rotatably connected to the frame 1. The transmission component 67 connects the driving wheel 62 and the driven wheel 61 together. When the driving wheel 62 rotates, it drives the driven wheel 61 to rotate via the transmission component 67, thereby driving the rotation of the conveying shaft 55. To facilitate the installation of the driving wheel 62, a transmission box 65 is provided on the frame 1. The driving wheel 62 is rotatably installed in the transmission box 65, thus achieving a relative rotatable connection between the driving wheel 62 and the frame 1. Figure 9 As shown, a tensioning wheel 68 is also rotatably mounted on the transmission box 65. By adjusting the position of the tensioning wheel 68, the transmission component 67 is tensioned. The transmission component 67 is also in contact with the tensioning wheel 68. When the driving wheel 62 and the driven wheel 61 are pulleys, the transmission component 67 is a belt; when the driving wheel 62 and the driven wheel 61 are sprockets, the transmission component 67 is a chain.

[0041] like Figure 7 As shown, the conveying cylinder 5 and the covering cylinder 4 are fixedly connected. The side wall of the covering cylinder 4 has a discharge hole 41, which faces downward. The soil inside the covering cylinder 4 falls through the discharge hole 41, achieving strip-shaped soil covering, that is, the soil covering the mulch film is in strip shape. The discharge hole 41 can be round or square. When the size of the discharge hole 41 is different, the soil covering width and the amount of soil covering are different.

[0042] like Figure 8 As shown, the covering cylinder 4 and the conveying cylinder 5 can also be rotatably connected. The covering cylinder 4 is smaller at both ends and larger in the middle. There is a transmission mechanism between the conveying shaft 55 and the covering cylinder 4. Under the action of the transmission mechanism, the conveying shaft 55 and the covering cylinder 4 rotate simultaneously. Figure 8 , Figure 9 As shown, the transmission mechanism includes a driven gear 63, a driving gear 64, and a transmission box 65. The driving gear 64 and the driving wheel 62 are rotatably mounted on the transmission box 65. The driven gear 63 is fixed to the outer wall of the soil covering cylinder 4. The driving gear 64 meshes with the driven gear 63. A reversing mechanism 66 is provided between the driving gear 64 and the driving wheel 62. Figure 9 As shown, the reversing mechanism 66 includes a first transmission gear 661, a second transmission gear 662, a worm gear 664, and a worm 663 located within the transmission box 65. The first transmission gear 661 is coaxially arranged with the driving wheel 62, the second transmission gear 662 is coaxially arranged with the worm 663 and meshes with the first transmission gear 661, and the worm gear 664 is coaxially arranged with the driving gear 64 and meshes with the worm 663. When the driving wheel 62 rotates, the first transmission gear 661 rotates accordingly, which in turn drives the second transmission gear 662 to rotate, which in turn drives the worm 663 to rotate, which in turn drives the worm gear 664 to rotate, which in turn drives the driving gear 64 to rotate, which in turn drives the driven gear 63 to rotate, which in turn drives the soil covering cylinder 4 to rotate. When the driving wheel 62 rotates, it also drives the driven wheel 61 to rotate through the transmission component 67, which in turn drives the conveying shaft 55 to rotate, thus realizing the simultaneous rotation of the conveying shaft 55 and the soil covering cylinder 4. The transmission mechanism is one embodiment of the present invention. Other structural forms are also possible. The transmission mechanism and the conveying drive mechanism constitute a linkage assembly. Under the action of the linkage assembly, the conveying shaft 55 and the covering cylinder 4 rotate simultaneously. Provided that the covering disc 3 can push sufficient soil towards the feed hopper 51, the rotational speed of the conveying shaft 55 determines the amount of soil to be covered.

[0043] In this embodiment with the linkage component, the soil conveying and the rotation of the covering cylinder 4 are synchronized. The continuous soil conveying ensures that there is soil inside the covering cylinder 4, and the rotation of the covering cylinder 4 enables point-like soil covering, ensuring consistent soil covering spacing. The synchronized soil conveying and the rotation of the covering cylinder 4 (i.e., soil covering) ensure consistent soil covering amount.

[0044] Example 2:

[0045] To achieve more precise quantitative soil covering, such as Figure 11 , Figure 12 As shown, the covering cylinder 4 and the conveying cylinder 5 are fixedly connected. At this time, the covering cylinder 4 has an inverted triangular structure. The bottom of the covering cylinder 4 has a measuring cylinder 43, and the discharge hole 41 is located at the bottom of the measuring cylinder 43. Figure 15 As shown, the discharge hole 41 has several baffles 44, which are hinged to the inner wall of the discharge hole 41 and a torsion spring is provided between them. When the torsion spring has zero deformation, the baffle 44 blocks the discharge hole 41. The soil covering cylinder 4 has an unloading component that moves from top to bottom to push the soil out of the soil measuring cylinder 43. The soil measuring cylinder 43 has a fixed volume, and the soil in the soil measuring cylinder 43 falls onto the mulch film to achieve precise quantitative soil covering. By changing the volume of the soil measuring cylinder 43, the amount of soil covering can be changed.

[0046] like Figure 13 , Figure 14 As shown, the unloading assembly includes a slider 84 and an unloading drive mechanism. The slider 84 is slidably disposed inside the soil-covering cylinder 4. The bottom of the slider 84 has a pressure rod 86 and pressure needles 85 located around the pressure rod 86. The pressure rod 86 is located at the center of the soil-covering cylinder 43. The unloading drive mechanism drives the slider 84 to move up and down reciprocally. Figures 11 to 13 As shown, the unloading drive mechanism includes a main shaft 8, a first bevel gear 81, a second bevel gear 82, and a connecting rod 83. The main shaft 8 is rotatably mounted on the top of the soil-covering cylinder 4. The first bevel gear 81 is fixed to the lower part of the main shaft 8. The second bevel gear 82 is rotatably mounted inside the soil-covering cylinder 4 and meshes with the first bevel gear 81. The upper end of the connecting rod 83 is hinged to the second bevel gear 82, and the lower end of the connecting rod 83 is hinged to the slider 84. The second bevel gear 82, the connecting rod 83, and the slider 84 constitute a crank-slider mechanism. When the second bevel gear 82 rotates, it pulls the slider 84 to reciprocate through the connecting rod 83. When the slider 84 moves downward, the pressure rod 86 first penetrates the soil inside the soil-measuring cylinder 43 until the bottom of the pressure rod 86 contacts the intersection point of the baffle 44. After that, the pressure rod 86 pushes the baffle 44 to swing around the hinge point, as shown. Figure 17 As shown, a gap appears between the baffles 44, and the soil in the measuring cylinder 43 falls through the gap between the baffles 44. The pressure needle 85, during the process of the slider 84 moving down into the measuring cylinder 43, has a piercing and loosening effect on the soil, which can prevent soil clumping under the pressure of the slider 84 and the baffles 44. Figure 16As shown, the soil entering the covering cylinder 4 rolls along the inclined bottom 42 into the measuring cylinder 43. The slider 84 moves up and down repeatedly. When the slider 84 moves downward, it pushes the soil out of the measuring cylinder 43 to achieve covering. When the slider 84 moves upward, the baffle 44 resets under the action of the torsion spring, thus re-closing the discharge hole 41. At least when the discharge hole 41 is just closed, the slider 84 just disengages from the measuring cylinder 43. After that, the slider 84 continues to move upward, and the soil on the inclined bottom 42 slides into the measuring cylinder 43. The slider 84 can be designed with pointed ends and a thicker middle. The lower end of the slider 84 is conical to facilitate entry into the measuring cylinder 43. A blade is installed on the upper end of the slider 84. The conical shape of the upper end of the slider 84 and the setting of the blade can break up the soil above the slider 84 when the slider 84 moves upward. The setting of the pressure needle 85 and the blade both play a role in breaking up the soil, ensuring that the soil is finely broken and loose, so that the amount of soil entering the measuring cylinder 43 remains consistent.

[0047] The top of the main shaft 8 is fixedly connected to the drive pulley 62 of the conveying drive mechanism, so that the main shaft 8 rotates while the conveying shaft 55 rotates. That is, the conveying component continuously conveys soil into the covering cylinder 4, and the slider 84 of the unloading component intermittently pushes the soil out of the measuring cylinder 43 to achieve soil covering, thereby achieving point-like soil covering.

[0048] An embodiment of the unloading component is used to achieve point-like soil covering. Soil is quantitatively measured using a soil measuring cylinder 43, and the unloading component pushes out the measured amount of soil from the measuring cylinder 43 to achieve soil covering. In this embodiment, the rotational speed of the conveying shaft 55 affects the amount of soil delivered to the soil covering cylinder 4, and also affects the amount of soil covered. The rotational speed of the conveying shaft 55 can be adjusted by controlling the rotational speed of the drive wheel 62 until a suitable speed is reached.

[0049] Example 3:

[0050] like Figure 18 As shown, the difference between Embodiment 3 and Embodiment 1 is that in Embodiment 3, the covering cylinder 4 and the conveying cylinder 5 are rotatably connected, and the discharge holes 41 are evenly arranged circumferentially on the side wall of the covering cylinder 4. Specifically, the end of the covering cylinder 4 extends into the corresponding side of the conveying cylinder 5 and is rotatably connected to the conveying cylinder 5. A transmission mechanism is provided between the covering cylinder 4 and the conveying shaft 55, and the rotation of the covering cylinder 4 is driven by the rotation of the conveying shaft 55. The distance between adjacent discharge holes 41 is between 1-3 cm. During the rotation of the covering cylinder 4, the soil in the covering cylinder 4 can pass through the discharge holes 41 to achieve continuous falling, thereby achieving strip-shaped covering.

[0051] Example 4:

[0052] like Figure 19As shown, the difference between Embodiment 4 and Embodiment 3 is that in Embodiment 4, the feed hopper 51 is inclined relative to the conveying cylinder 5. Specifically, the feed hopper 51 and the conveying cylinder 5 form an acute angle, and the open end of the feed hopper 51 is higher than the connection between the feed hopper 51 and the conveying cylinder 5, which is more conducive to soil entering the conveying cylinder 5.

[0053] Embodiments 1 to 4 of the present invention are all used to achieve single-row soil covering. Based on Embodiments 1 to 4, two sets of discharge holes 41 located at different axial positions are provided on the soil covering cylinder 4. The distance between the two sets of discharge holes 41 is equal to the distance between the two rows of soil covering strips, thereby achieving double-row soil covering.

[0054] This invention, through the arrangement of the conveying components, evenly transports the soil scraped by the covering disc 3 into the covering cylinder 4, thereby avoiding inconsistent soil coverage caused by varying amounts of soil entering the covering cylinder 4. The amount of soil to be covered can be adjusted by regulating the rotational speed of the conveying shaft 55. The bottom of the covering cylinder 4 has an inclined bottom 42, allowing the soil entering the covering cylinder 4 to slide along the inclined bottom under its own weight to the discharge hole 41, thus covering the mulch film. Furthermore, the movement of soil within the enclosed environment formed by the feed hopper 51, the conveying cylinder 5, and the covering cylinder 4 prevents dust generation.

Claims

1. A film covering device, comprising a frame and a film roller, a covering disc, and a covering cylinder mounted on the frame, wherein the covering disc is disposed on the feed side of the covering cylinder and is inclined along the traveling direction of the frame, characterized in that, A conveying assembly is provided between the covering cylinder and the covering pan. The conveying assembly includes a conveying cylinder, a conveying shaft, and a conveying drive mechanism. The lower side wall of the conveying cylinder has a feed hopper, with its top and one end facing the covering pan open to form a feed inlet. The conveying shaft is rotatably mounted inside the conveying cylinder, and helical blades are fixed on the conveying shaft inside the conveying cylinder. The conveying drive mechanism is connected to the conveying shaft outside the conveying cylinder to drive its rotation. The upper side wall of the conveying cylinder has a discharge port communicating with the covering cylinder. The soil-covering cylinder has an inclined bottom, the upper end of which connects to the discharge port, and the lower end of which communicates with the discharge hole on the soil-covering cylinder. The soil-covering cylinder is rotatably connected to the conveying cylinder, and the soil-covering cylinder is narrow at both ends and wide in the middle. A transmission mechanism is provided between the conveying shaft and the soil-covering cylinder, and the conveying shaft and the soil-covering cylinder rotate simultaneously under the action of the transmission mechanism. The transmission mechanism includes a driven gear, a driving gear, and a transmission box. The driving gear and the driving wheel are rotatably mounted on the transmission box, and the driven gear is fixed on the soil-covering cylinder. The driving gear and the driven gear... The drive gear and drive wheel are meshed, and a reversing mechanism is provided between them; or, the conveying cylinder and the covering cylinder are fixedly connected, the covering cylinder has an inverted triangular structure, the bottom of the covering cylinder has a measuring cylinder, the discharge hole is located at the bottom of the measuring cylinder, the discharge hole has several baffles, the baffles are hinged to the inner wall of the discharge hole and a torsion spring is provided between them, the baffles block the discharge hole when the torsion spring has zero deformation; the covering cylinder has an unloading assembly that moves from top to bottom to push the soil in the measuring cylinder out; the unloading assembly includes a slider and an unloading drive. The sliding mechanism includes a slider slidably disposed inside the covering cylinder. The bottom of the slider has a pressure rod and pressure pins located around the pressure rod. The unloading drive mechanism drives the slider to move up and down reciprocally. The unloading drive mechanism includes a main shaft, a first bevel gear, a second bevel gear, and a connecting rod. The main shaft is rotatably mounted on the top of the covering cylinder. The first bevel gear is fixed to the lower part of the main shaft. The second bevel gear is rotatably mounted inside the covering cylinder and meshes with the first bevel gear. The upper end of the connecting rod is hinged to the second bevel gear, and the lower end of the connecting rod is hinged to the slider.

2. The membrane-covering soil device according to claim 1, characterized in that, The feed hopper has a conical structure, with its small end fixedly connected to the conveying cylinder and its large end facing the soil covering plate.

3. The membrane-covering soil device according to claim 1, characterized in that, The conveying drive mechanism includes a driven wheel, a driving wheel, and a transmission component. The driven wheel is fixed on a conveying shaft outside the conveying cylinder. The driving wheel is rotatably connected to the frame. The transmission component connects the driving wheel and the driven wheel together.

4. The membrane-covering soil device according to claim 1, characterized in that, The reversing mechanism includes a first transmission gear, a second transmission gear, a worm gear, and a worm located in the transmission box. The first transmission gear is coaxially arranged with the driving gear, the second transmission gear is coaxially arranged with the worm and meshes with the first transmission gear, and the worm gear is coaxially arranged with the driving gear and meshes with the worm.

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