Film mulching device for agricultural planting and use method of film mulching device

Abstract

The invention discloses a film mulching device for agricultural planting and a using method thereof, and relates to the technical field of agricultural planting.The film mulching device comprises a film roll, a main body mechanism is arranged in the film roll, a film mulching mechanism is arranged on the bottom face of the main body mechanism, the film mulching mechanism comprises a support, and the support is fixedly connected to the bottom face of the main body mechanism; a motor is fixedly connected to the middle of the bottom face of the support, and the output end of the motor is fixedly connected with a threaded rod. Rotation of a threaded rod is controlled through rotation of a motor, the threaded rod can drive a transmission block to move forwards or backwards along with the transmission block, the width of the film pressing device is adjusted, a fixed bearing block plays a role in fixing a cam, meanwhile, an edge rod can rotate in the fixed bearing block through a bearing arranged in the fixed bearing block, and when the film pressing device makes contact with the bottom face, the edge rod can rotate. And when the power device advances, the soil turning knife shovels up the soil in the advancing process, and the soil turning knife is guided by the guide block to be pressed on the two sides of the mulching film to fix the mulching film.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural planting, and in particular to a film covering device for agricultural planting and a method of using the same. Background Art

[0002] Film covering can play a positive role in heat preservation, water conservation, fertilizer conservation, etc. Therefore, in the process of modern agricultural planting, it is necessary to use plastic film for film covering operations on the land that has been sown.

[0003] Patent publication number CN117378306A discloses an agricultural planting film covering device, which realizes moderate soil moisture content, good film adhesion and not easy to fall off during the film covering process through the structure and installation position design of a ratchet-type driving wheel, a driven wheel, a film covering mechanism, a water tank, a spike rake, a soil covering mechanism and a spraying mechanism.

[0004] In order to solve the problem that the ground film will fall off due to lack of compaction during the film covering process, thus affecting the film covering effect, the existing technology adopts a method of scraping loose soil onto the ground film to prevent the ground film from falling off. However, there is still a problem that the spacing of the film pressing wheel cannot be adjusted, which leads to the problem of being unable to adapt to film covering work of various widths. Summary of the invention

[0005] The object of the present invention is to provide a film covering device for agricultural planting and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] In the first aspect, the present invention provides a film covering device for agricultural planting, comprising a film roll, wherein a main body mechanism is arranged inside the film roll, and a film covering mechanism is arranged on the bottom surface of the main body mechanism, and the film covering mechanism comprises a bracket, and the bracket is fixedly connected to the bottom surface of the main body mechanism, and a motor is fixedly connected to the middle part of the bottom surface of the bracket, and a threaded rod is fixedly connected to the output end of the motor, and a cleaning device is fixedly connected to one end of the bottom surface of the bracket, and a slide groove is provided inside the bottom surface of the bracket, and a film pressing device is slidably connected inside the slide groove.

[0008] A further improvement of the technical solution of the present invention is that a fixed bearing block is fixedly connected to the bottom surface of the bracket, a support arm is fixedly connected to the side of the film pressing device, a soil-turning knife is fixedly connected to the bottom surface of the support arm, and a guide block is fixedly connected to the side of the soil-turning knife.

[0009] A further improvement of the technical solution of the present invention is that the film pressing device includes a slider, which is slidably connected to the inside of the slide groove, the bottom surface of the slider is fixedly connected to a support wheel, the side of the support wheel is fixedly connected to a rotating rod, one end of the rotating rod passes through the side of the support wheel and is rotatably connected to the film pressing wheel, and the side of the film pressing wheel is fixedly connected to a ridge rod.

[0010] A further improvement of the technical solution of the present invention is that: the edge rod is rotatably connected to the inside of the fixed bearing block, one end of the outer surface of the edge rod is slidably connected to a cam, the side of the support wheel is movably connected to a movable rod, the side of the movable rod is movably connected to a transmission block, and the threaded rod is threadedly connected to the inside of the transmission block.

[0011] A further improvement of the technical solution of the present invention is that the cleaning device includes a fixed block, the fixed block is fixedly connected to the bottom surface of the bracket, a hollow groove is opened inside the side surface of the fixed block, the threaded rod is rotatably connected to the inside of the hollow groove, a fixed rod is fixedly connected to the side surface of the fixed block, one end of the outer surface of the fixed rod is rotatably connected to a swing arm, a transmission rod is fixedly connected to the side surface of the swing arm, one end of the transmission rod is movably connected to the inside of the outer surface of the cam, and a cleaning head is fixedly connected to the bottom surface of the swing arm.

[0012] A further improvement of the technical solution of the present invention is that the main mechanism includes a mounting rod, which is movably connected to the inside of the film roll, a quick loading and unloading device is fixedly connected to the side of the mounting rod, the other side of the mounting rod is fixedly connected to a side plate, the top surface of the side plate is fixedly connected to a middle plate, the bracket is fixedly connected to the bottom surface of the middle plate, and the bottom surface of the middle plate is fixedly connected to a pull rod.

[0013] A further improvement of the technical solution of the present invention is that: the top surface of the middle plate is fixedly connected to the cargo bucket, one end of the bottom surface of the middle plate is fixedly connected to the mounting block, the internal top surface of the mounting block is fixedly connected to the telescopic rod, the output end of the telescopic rod is fixedly connected to the moving block, the internal rotation of the moving block is connected to a rotating shaft, and one end of the rotating shaft is fixedly connected to a moving wheel.

[0014] A further improvement of the technical solution of the present invention is that the quick loading and unloading device includes an outer frame, the outer frame is fixedly connected to the side of the mounting rod, the inner top end of the outer frame is movably connected with an upper limit block, the inner bottom end of the outer frame is movably connected with a lower limit block, the top surface of the lower limit block is fixedly connected with a telescopic rod 2, the top surface of the telescopic rod 2 is fixedly connected to the bottom surface of the upper limit block, the bottom surface of the upper limit block is fixedly connected with a telescopic rod 1, the bottom surface of the telescopic rod 1 is fixedly connected to the inner bottom surface of the outer frame, the inner part of the outer frame is fixedly connected with a limit rod, and one end of the outer surface of the limit rod passes through and is slidably connected to the inner top surfaces of the upper limit block and the lower limit block.

[0015] In a second aspect, the present invention further provides a method for using a film covering device for agricultural planting, the method for using the film covering device for agricultural planting comprising the following steps:

[0016] Step 1: Installation preparation: align the circular hole in the middle of the film roll with the installation rod, and push the film roll in the direction of the installation rod. At this time, the upper limit block and the lower limit block shrink downward along the telescopic rod 2 and the telescopic rod 1 under the action of the squeezing force. When the film roll is completely installed on the outer surface of the main body, the telescopic rod 2 and the telescopic rod 1 pop out the upper limit block and the lower limit block to limit the film roll;

[0017] Step 2, film coating process: fix the pull rod on the required power device, drive the telescopic rod to retract the moving wheel, drive the motor to drive the transmission block and the movable rod to shrink, adjust the distance between the two film pressing wheels to adapt to the film coating work of different widths, when the film pressing wheel is completely in contact with the ground and presses one end of the film roll, the power device drives the whole device forward, and the film roll continues to coat the ground surface under the pull of the film pressing wheel. The soil turning knife will shovel up the soil on the side and press it on both sides of the film for fixing through the guidance of the guide block. The rotating film pressing wheel drives the cam to rotate through the edge rod, and the transmission rod is used to transmit the power to make the cleaning head swing to clean the debris on the film.

[0018] Step 3: Replace the film roll: When the film roll is used up, pinch the upper and lower limit blocks that extend out of the outer frame at the same time to drive the upper and lower limit blocks to retract. At this time, the film roll is not blocked and can be easily peeled off from the surface of the mounting rod to replace a new film roll.

[0019] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0020] 1. The present invention provides a film covering device for agricultural planting and a method of using the same. The film covering mechanism, a bracket, a slide groove, a support arm, a soil turning knife, a cleaning device, a motor, a threaded rod, a film pressing device, a fixed bearing block, and a guide block are matched. The rotation of the threaded rod is controlled by the rotation of the motor, and the threaded rod drives the transmission block to move forward or backward to adjust the width of the film pressing device. The fixed bearing block not only plays the role of a fixed cam, but also allows the edge rod to rotate inside it through the bearing arranged inside it. When the film pressing device contacts the bottom surface and moves forward through the power device, the soil turning knife will scoop up the soil during the forward process, and the guide block guides it to press on both sides of the film to fix it, thereby improving the adaptability of the device.

[0021] 2. The present invention provides a film covering device for agricultural planting and a method of using the same, which adopts a cleaning device, a fixed block, a hollow groove, a fixed rod, a swing arm, a transmission rod, a cleaning head, a film pressing device, a slider, a support wheel, a movable rod, a transmission block, a rotating rod, a film pressing wheel, a ridge rod, and a cam. The transmission block can drive the angle of the movable rod to change as the threaded rod moves forward or backward, so that the slider drives the supporting wheel to slide inside the slide groove, thereby adjusting the distance between the two film pressing wheels to meet the requirements of film covering of different widths. The rotation of the film pressing wheel drives the ridge rod to rotate, and the ridge rod drives the cam to rotate. Through the transmission of the transmission rod, the swing arm drives the cleaning head to swing, so as to remove debris on the film, extend the service life of the film, and improve the adaptability of the device.

[0022] 3. The present invention provides a film covering device for agricultural planting and a method of using the same, which adopts a film roll, a main body mechanism, a mounting rod, a moving wheel, a side plate, a quick loading and unloading device, an outer frame, an upper limit block, a telescopic rod one, a lower limit block, a telescopic rod two, a limit rod, a middle plate, a pull rod, a cargo bucket, a mounting block, a telescopic rod, a moving block, and a rotating shaft. By sleeveing ​​the film roll on the surface of the mounting rod, the upper limit block and the lower limit block can be retracted due to the arrangement of the telescopic rod two and the telescopic rod one, which is convenient for the installation of the film roll and can limit the film roll. The telescopic rod can control the extension and retraction of the moving block, and then control the extension and retraction of the moving wheel. During the film covering process, the moving wheel remains in a retracted state and moves through the film pressing wheel. After the work is completed, the telescopic rod pushes the moving block to the lowest point, so that the moving wheel can drive the entire device to move. When the film roll is used up, the upper limit block and the lower limit block extending out of the outer frame can be pressed at the same time, so that the upper limit block and the lower limit block release the limit on the film roll, which is convenient for taking out and replacing the film roll, thereby improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the laminating mechanism of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the film pressing device of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the cleaning device of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the main mechanism of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the quick loading and unloading device of the present invention.

[0029] In the figure: 1, film roll; 2, main body; 21, mounting rod; 22, moving wheel; 23, side plate; 24, quick loading and unloading device; 241, outer frame; 242, upper limit block; 243, telescopic rod 1; 244, lower limit block; 245, telescopic rod 2; 246, limit rod; 25, middle plate; 26, pull rod; 27, cargo box; 28, mounting block; 29, telescopic rod; 210, moving block; 211, rotating shaft; 3, film coating mechanism; 31, bracket; 32, slideway; 33, Support arm; 34, soil turning knife; 35, cleaning device; 351, fixed block; 352, hollow groove; 353, fixed rod; 354, swing arm; 355, transmission rod; 356, cleaning head; 36, motor; 37, threaded rod; 38, film pressing device; 381, slider; 382, ​​support wheel; 383, movable rod; 384, transmission block; 385, rotating rod; 386, film pressing wheel; 387, ridge rod; 388, cam; 39, fixed bearing block; 310, guide block. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with embodiments:

[0031] Example 1

[0032] First, as Figure 1-6 As shown, the present invention provides a film covering device for agricultural planting, including a film roll 1, a main body mechanism 2 is arranged inside the film roll 1, a film covering mechanism 3 is arranged on the bottom surface of the main body mechanism 2, the film covering mechanism 3 includes a bracket 31, the bracket 31 is fixedly connected to the bottom surface of the main body mechanism 2, a motor 36 is fixedly connected to the middle of the bottom surface of the bracket 31, a threaded rod 37 is fixedly connected to the output end of the motor 36, a cleaning device 35 is fixedly connected to one end of the bottom surface of the bracket 31, a slide groove 32 is provided inside the bottom surface of the bracket 31, a film pressing device 38 is slidably connected inside the slide groove 32, a fixed bearing block 39 is fixedly connected to the bottom surface of the bracket 31, a support arm 33 is fixedly connected to the side of the film pressing device 38, a soil turning knife 34 is fixedly connected to the bottom surface of the support arm 33, and a guide block 310 is fixedly connected to the side of the soil turning knife 34.

[0033] In this embodiment, the rotation of the threaded rod 37 is controlled by the rotation of the motor 36, and the threaded rod 37 will drive the transmission block 384 to move forward or backward to adjust the width of the film pressing device 38. The fixed bearing block 39 not only plays the role of fixing the cam 388, but also allows the edge rod 387 to rotate inside it through the bearing arranged inside it. When the film pressing device 38 contacts the bottom surface and moves forward through the power device, the soil-turning knife 34 will shovel up the soil during the forward process, and guide it to be pressed on both sides of the film to fix it through the guide block 310.

[0034] Example 2

[0035] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the film pressing device 38 includes a slider 381, the slider 381 is slidably connected to the inside of the slide groove 32, the bottom surface of the slider 381 is fixedly connected to the support wheel 382, ​​the side of the support wheel 382 is fixedly connected to the inside of the rotating rod 385, one end of the rotating rod 385 passes through the side of the support wheel 382 and is rotatably connected to the film pressing wheel 386, the side of the film pressing wheel 386 is fixedly connected to the edge rod 387, the edge rod 387 is rotatably connected to the inside of the fixed bearing block 39, one end of the outer surface of the edge rod 387 is slidably connected to the cam 388, the side of the support wheel 382 is movably connected to the movable rod 383, and the movable rod 38 3 is movably connected with a transmission block 384 on the side, and a threaded rod 37 is threadedly connected inside the transmission block 384. The cleaning device 35 includes a fixed block 351, which is fixedly connected to the bottom surface of the bracket 31. A hollow groove 352 is provided inside the side of the fixed block 351, and the threaded rod 37 is rotatably connected inside the hollow groove 352. A fixed rod 353 is fixedly connected to the side of the fixed block 351, and one end of the outer surface of the fixed rod 353 is rotatably connected to a swing arm 354. A transmission rod 355 is fixedly connected to the side of the swing arm 354, and one end of the transmission rod 355 is movably connected to the inner outer surface of the cam 388. A cleaning head 356 is fixedly connected to the bottom surface of the swing arm 354.

[0036] In this embodiment, the transmission block 384 can drive the angle of the movable rod 383 to change as the threaded rod 37 moves forward or backward, so that the slider 381 drives the support wheel 382 to slide inside the slide groove 32, thereby adjusting the distance between the two film pressing wheels 386 to meet the requirements of coatings of different widths. The rotation of the film pressing wheel 386 drives the edge rod 387 to rotate, and the edge rod 387 drives the cam 388 to rotate. Through the transmission of the transmission rod 355, the swing arm 354 drives the cleaning head 356 to swing, thereby removing debris on the coating and extending the service life of the coating.

[0037] Example 3

[0038] like Figure 1-6As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the main body mechanism 2 includes a mounting rod 21, the mounting rod 21 is movably connected to the inside of the film roll 1, the side of the mounting rod 21 is fixedly connected to a quick loading and unloading device 24, the other side of the mounting rod 21 is fixedly connected to a side plate 23, the top surface of the side plate 23 is fixedly connected to a middle plate 25, the bracket 31 is fixedly connected to the bottom surface of the middle plate 25, the bottom surface of the middle plate 25 is fixedly connected to a pull rod 26, the top surface of the middle plate 25 is fixedly connected to a cargo bucket 27, one end of the bottom surface of the middle plate 25 is fixedly connected to a mounting block 28, the internal top surface of the mounting block 28 is fixedly connected to a telescopic rod 29, the output end of the telescopic rod 29 is fixedly connected to a moving block 210, the internal rotation of the moving block 210 is connected to a rotating shaft 211, the rotating shaft 21 One end of the outer frame 241 is fixedly connected with a moving wheel 22, and the quick loading and unloading device 24 includes an outer frame 241, which is fixedly connected to the side of the mounting rod 21, and the inner top of the outer frame 241 is movably connected with an upper limit block 242, and the inner bottom of the outer frame 241 is movably connected with a lower limit block 244, and the top surface of the lower limit block 244 is fixedly connected with a telescopic rod 245, and the top surface of the telescopic rod 245 is fixedly connected to the bottom surface of the upper limit block 242, and the bottom surface of the upper limit block 242 is fixedly connected with a telescopic rod 1 243, and the bottom surface of the telescopic rod 1 243 is fixedly connected to the inner bottom surface of the outer frame 241, and the inner part of the outer frame 241 is fixedly connected with a limit rod 246, and one end of the outer surface of the limit rod 246 penetrates and is slidably connected to the inner top surfaces of the upper limit block 242 and the lower limit block 244.

[0039] In this embodiment, by putting the film roll 1 on the surface of the installation rod 21, due to the setting of the telescopic rod 245 and the telescopic rod 1 243, the upper limit block 242 and the lower limit block 244 can be retracted, which is convenient for the installation of the film roll 1 and can limit the film roll 1. The telescopic rod 29 can control the extension and retraction of the moving block 210, and then control the extension and retraction of the moving wheel 22. During the laminating process, the moving wheel 22 remains in a retracted state and moves through the film pressing wheel 386. After the work is completed, the telescopic rod 29 pushes the moving block 210 to the lowest point, so that the moving wheel 22 can drive the entire device to move. When the film roll 1 is used up, the upper limit block 242 and the lower limit block 244 that extend out of the outer frame 241 can be pressed at the same time, so that the upper limit block 242 and the lower limit block 244 release the limit on the film roll 1, making it convenient to take out and replace the film roll 1.

[0040] In a second aspect, the present invention further provides a method for using a film covering device for agricultural planting, the method for using the film covering device for agricultural planting comprising the following steps:

[0041] Step 1, installation preparation: align the circular hole in the middle of the film roll 1 with the installation rod 21, and push the film roll 1 in the direction of the installation rod 21, at this time, the upper limit block 242 and the lower limit block 244 shrink downward along the telescopic rod 245 and the telescopic rod 1 243 under the action of the squeezing force, when the film roll 1 is completely installed on the outer surface of the main body 2, the telescopic rod 245 and the telescopic rod 1 243 pop out the upper limit block 242 and the lower limit block 244 to limit the film roll 1;

[0042] Step 2, film coating process: fix the pull rod 26 on the required power device, drive the telescopic rod 29 to retract the moving wheel 22, drive the motor 36 to drive the transmission block 384 and the movable rod 383 to contract, and adjust the distance between the two film pressing wheels 386 to adapt to the film coating work of different widths. When the film pressing wheel 386 is completely in contact with the ground and presses one end of the film roll 1, the power device drives the entire device forward. Under the pull of the film pressing wheel 386, the film roll 1 continues to coat the ground surface. The soil turning knife 34 will shovel up the soil on the side and press it on both sides of the film for fixing through the guidance of the guide block 310. The rotating film pressing wheel 386 drives the cam 388 to rotate through the edge rod 387, and transmits through the transmission rod 355, so that the cleaning head 356 swings to clean the debris on the film.

[0043] Step 3, replacing the film roll: when the film roll 1 is used up, pinch the upper limit block 242 and the lower limit block 244 that extend out of the outer frame 241 at the same time to drive the upper limit block 242 and the lower limit block 244 to retract. At this time, the film roll 1 is not blocked and can be easily peeled off from the surface of the mounting rod 21 so as to replace a new film roll 1.

[0044] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A film covering device for agricultural planting, comprising a film roll (1), characterized in that: A main body mechanism (2) is arranged inside the film roll (1), and a film coating mechanism (3) is arranged on the bottom surface of the main body mechanism (2); The coating mechanism (3) comprises a bracket (31), the bracket (31) is fixedly connected to the bottom surface of the main body mechanism (2), a motor (36) is fixedly connected to the middle of the bottom surface of the bracket (31), a threaded rod (37) is fixedly connected to the output end of the motor (36), a cleaning device (35) is fixedly connected to one end of the bottom surface of the bracket (31), a sliding groove (32) is provided inside the bottom surface of the bracket (31), and a film pressing device (38) is slidably connected inside the sliding groove (32).

2. A film covering device for agricultural planting according to claim 1, characterized in that: The bottom surface of the bracket (31) is fixedly connected to a fixed bearing block (39), the side surface of the film pressing device (38) is fixedly connected to a support arm (33), the bottom surface of the support arm (33) is fixedly connected to a soil turning knife (34), and the side surface of the soil turning knife (34) is fixedly connected to a guide block (310).

3. The film covering device for agricultural planting according to claim 1, characterized in that: The film pressing device (38) includes a slider (381), which is slidably connected to the inside of the slide groove (32), and the bottom surface of the slider (381) is fixedly connected to a support wheel (382), and the side of the support wheel (382) is fixedly connected to a rotating rod (385), one end of the rotating rod (385) passes through the side of the support wheel (382) and is rotatably connected to a film pressing wheel (386), and the side of the film pressing wheel (386) is fixedly connected to a ridge rod (387).

4. The film covering device for agricultural planting according to claim 3, characterized in that: The prism rod (387) is rotatably connected to the inside of the fixed bearing block (39); one end of the outer surface of the prism rod (387) is slidably connected to a cam (388); the side of the support wheel (382) is movably connected to a movable rod (383); the side of the movable rod (383) is movably connected to a transmission block (384); and the threaded rod (37) is threadedly connected to the inside of the transmission block (384).

5. The film covering device for agricultural planting according to claim 1, characterized in that: The cleaning device (35) comprises a fixed block (351), wherein the fixed block (351) is fixedly connected to the bottom surface of the bracket (31), a hollow groove (352) is provided inside the side surface of the fixed block (351), the threaded rod (37) is rotatably connected inside the hollow groove (352), a fixed rod (353) is fixedly connected to the side surface of the fixed block (351), one end of the outer surface of the fixed rod (353) is rotatably connected to a swing arm (354), a transmission rod (355) is fixedly connected to the side surface of the swing arm (354), one end of the transmission rod (355) is movably connected to the inner side of the outer surface of the cam (388), and a cleaning head (356) is fixedly connected to the bottom surface of the swing arm (354).

6. The film covering device for agricultural planting according to claim 1, characterized in that: The main body mechanism (2) comprises a mounting rod (21), the mounting rod (21) being movably connected to the inside of the film roll (1), the side of the mounting rod (21) being fixedly connected to a quick loading and unloading device (24), the other side of the mounting rod (21) being fixedly connected to a side plate (23), the top surface of the side plate (23) being fixedly connected to a middle plate (25), the bracket (31) being fixedly connected to the bottom surface of the middle plate (25), and the bottom surface of the middle plate (25) being fixedly connected to a pull rod (26).

7. The film covering device for agricultural planting according to claim 6, characterized in that: The top surface of the middle plate (25) is fixedly connected to a cargo bucket (27); one end of the bottom surface of the middle plate (25) is fixedly connected to a mounting block (28); the inner top surface of the mounting block (28) is fixedly connected to a telescopic rod (29); the output end of the telescopic rod (29) is fixedly connected to a moving block (210); the inner part of the moving block (210) is rotatably connected to a rotating shaft (211); one end of the rotating shaft (211) is fixedly connected to a moving wheel (22).

8. The film covering device for agricultural planting according to claim 7, characterized in that: The quick loading and unloading device (24) comprises an outer frame (241), the outer frame (241) is fixedly connected to the side of the mounting rod (21), the top end of the inner part of the outer frame (241) is movably connected to an upper limit block (242), the bottom end of the inner part of the outer frame (241) is movably connected to a lower limit block (244), the top surface of the lower limit block (244) is fixedly connected to a second telescopic rod (245), and the top surface of the second telescopic rod (245) is fixedly connected to The upper limit block (242) is connected to the bottom surface of the upper limit block (242), the bottom surface of the upper limit block (242) is fixedly connected to a telescopic rod (243), the bottom surface of the telescopic rod (243) is fixedly connected to the inner bottom surface of the outer frame (241), the inner part of the outer frame (241) is fixedly connected to a limiting rod (246), and one end of the outer surface of the limiting rod (246) passes through and is slidably connected to the inner top surfaces of the upper limit block (242) and the lower limit block (244).

9. A method for using a film covering device for agricultural planting, which is implemented based on the film covering device for agricultural planting according to any one of claims 1 to 8, characterized in that: The method for using the film covering device for agricultural planting comprises the following steps: Step 1, installation preparation: align the circular hole in the middle of the film roll (1) with the installation rod (21), and push the film roll (1) in the direction of the installation rod (21), at this time, the upper limit block (242) and the lower limit block (244) are retracted downward along the telescopic rod 2 (245) and the telescopic rod 1 (243) under the action of the squeezing force, and when the film roll (1) is completely installed on the outer surface of the main body (2), the telescopic rod 2 (245) and the telescopic rod 1 (243) pop out the upper limit block (242) and the lower limit block (244) to limit the film roll (1); Step 2, film coating process: fix the pull rod (26) on the required power device, drive the telescopic rod (29) to retract the moving wheel (22), drive the motor (36) to drive the transmission block (384) and the movable rod (383) to contract, adjust the distance between the two film pressing wheels (386) to adapt to the film coating work of different widths, when the film pressing wheel (386) is completely in contact with the ground and presses one end of the film roll (1), the power device drives the entire device forward, under the pull of the film pressing wheel (386), the film roll (1) continues to coat the ground surface, the soil turning knife (34) will shovel up the soil on the side, and press it on both sides of the film to fix it through the guidance of the guide block (310), the rotating film pressing wheel (386) drives the cam (388) to rotate through the edge rod (387), and the transmission is transmitted through the transmission rod (355), so that the cleaning head (356) swings to clean the debris on the film; Step 3, replacing the film roll: when the film roll (1) is used up, the upper limit block (242) and the lower limit block (244) are simultaneously pinched to extend out of the outer frame (241), thereby causing the upper limit block (242) and the lower limit block (244) to retract. At this time, the film roll (1) is not blocked and can be easily peeled off from the surface of the mounting rod (21) so as to replace a new film roll (1).

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