Sand-fixing mulching film laying device and method

Abstract

This invention belongs to the field of sand control and stabilization technology, specifically relating to a sand-fixing mulch film laying device and method, including a keel, roller assembly, lasso, ratchet mechanism, and control rod assembly. The roller assembly includes a rotating shaft and two blades. The rotating shaft is connected to the keel, and the two blades are respectively fitted onto both ends of the rotating shaft. Each blade has at least one protrusion fixed to its side, and the protrusions on the two blades are arranged opposite each other. The lasso is fixed around the two protrusions of the two blades. The ratchet mechanism controls the rotating shaft to rotate in a single direction. The control rod assembly includes a control component, two movable rods, and cantilever components. The two movable rods are parallel and rotatably connected to both ends of the rotating shaft. The cantilever components are fixed to the lower ends of the movable rods, and the upper ends of the two movable rods are controlled by the control component to steer the two cantilever components. This device enables the mulch film to longitudinally enclose and wrap around the sand, improving the adhesion between the mulch film and the sand, reducing the chance of damage, and achieving better sand fixation and water retention.

Description

Technical Field

[0001] This invention belongs to the field of sand control and stabilization technology, specifically relating to a sand-stabilizing mulch film laying device and a mulch film laying method. Background Technology

[0002] Desertification control and sand fixation are of great significance for protecting the ecological environment and promoting sustainable social development. On the one hand, sand control is a crucial foundation for protecting arable land and improving land quality. With global climate change, desertification is becoming increasingly severe, leading to the loss of large amounts of arable land and seriously impacting agricultural production. Therefore, effective sand control measures can effectively protect arable land and improve land quality and productivity. On the other hand, sand control is also an important way to promote the sustainable economic and social development of desert areas. Through sand control, the ecological environment of desert areas can be effectively improved, promoting economic prosperity and development. Furthermore, sand control can also increase the income of farmers and herdsmen and improve the living standards of residents in desert areas.

[0003] In desertification control, mulching technology plays a crucial role in modern desert management. This technology involves covering the desert surface with a mulch film, which not only effectively stabilizes shifting sands but also enhances the soil's water and fertilizer retention capacity, thus significantly contributing to improved agricultural productivity and sustainable development in desert regions. Existing mulch film laying equipment typically involves laying the film longitudinally or laterally along the soil surface, using a soil-covering mechanism to turn over and pile soil along the film's length, then compacting it to ensure stability. However, this method results in relatively poor ground adhesion for the mulch film. In arid and semi-arid regions with harsh environments and frequent strong winds, the mulch film cannot maintain its effectiveness for extended periods and is prone to large-scale damage under severe weather conditions, hindering its ability to stabilize sand and retain water. For example, patent CN108718554A provides an automatic mulch film laying device, including a frame, a walking mechanism and a mulch film roll fixing device located below the frame. A crossbar connected to the frame is provided behind the mulch film roll fixing device. A rotating shaft is horizontally arranged on the crossbar. A friction layer to increase resistance is provided at the rotatable connection between the rotating shaft and the crossbar, or a motor is used to drive the rotating shaft to rotate in order to control the rotation speed of the rotating shaft. A turntable is provided on the rotating shaft corresponding to both sides of the mulch film. Multiple soil receiving bowls are provided on the outer circumference of the turntable. The soil receiving bowls are used to pick up soil from the soil feeding device above, and then rotate to place the soil on both sides of the mulch film to cover the mulch film. This device uses soil-collecting bowls set on both sides of the mulch film to continuously press and fix the mulch film laid on the ground at intervals, which can effectively improve the efficiency of mulch film laying. However, in the face of harsh environments such as arid and semi-arid regions and frequent strong winds and shifting sand dunes, there are too many gaps between the mulch film and the ground when laid in this way. It is difficult to ensure the mulch film's adhesion to the ground, making it difficult to maintain its effectiveness for a long time, and it is easy to be damaged, thus failing to play its role in sand fixation and water retention. For example, patent CN209449354U provides a mulch film laying device, including a frame, a moving mechanism rotatably connected to the lower part of the frame, a soil-turning mechanism fixedly connected to the lower part of the frame, and a film-laying mechanism located in the middle of the frame. The frame includes two symmetrical supports and crossbars connected to the front and rear ends of the supports. The moving mechanism includes two front wheels and two rear wheels. The front wheels are rotatably connected to the supports through support rods, and the rear wheels are connected to the supports through telescopic mechanisms. The soil-turning mechanism includes a front shovel fixedly connected to the front end of the supports and a rear shovel fixedly connected to the rear end of the supports. The front shovel turns the soil outward, and the rear shovel turns the soil inward. When in use, the device is driven forward, where the front shovel turns the soil outward, the plastic film roll is laid as the device moves forward, and the rear shovel turns the soil inward, thus covering both sides of the plastic film with soil.Compared to the device provided by the patent with publication number CN108718554A, this device can ensure good continuity of the soil covering on both sides of the film during the covering process, and has a better sealing effect on both sides of the film. However, because a large amount of air will enter between the inside and the ground during the covering process, it still cannot guarantee the ground adhesion effect of the film. In the face of the harsh environment of arid and semi-arid regions and the frequent strong winds of shifting sand dunes, it is easy to break and it is difficult to play its role in sand fixation and water conservation. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the purpose of this invention is to provide a sand-fixing mulch film laying device and a mulch film laying method, which can enable the mulch film to longitudinally enclose and wrap the sand, ensuring that the mulch film can maintain a close contact with the sand and soil, reducing the chance of damage, and playing a better role in sand fixation and water retention.

[0005] The technical solution of this invention is:

[0006] A sand-fixing mulch film laying device includes a keel and a mulch film burying device, wherein the mulch film burying device includes:

[0007] The roller assembly includes a rotating shaft and two blades. The rotating shaft is rotatably connected to the opposite side walls of the keel. The two blades are respectively fitted and fixed at both ends of the rotating shaft. Each blade has at least one protrusion fixed on its side. The two protrusions are equidistant from the rotating shaft, and the protrusions on the two blades are arranged opposite to each other.

[0008] A ratchet mechanism is disposed between the rotating shaft and the inner wall of the blade, and the ratchet mechanism is used to control the rotating shaft to rotate in a single direction;

[0009] The control lever assembly includes a control component, two movable levers, and a cantilever member disposed on each movable lever. The two movable levers are arranged in parallel and rotatably connected to the two ends of the rotating shaft, and the movable levers are located on the upper side of the rotating shaft and the lasso. The cantilever member is fixed to the lower end of the movable lever. The upper ends of the two movable levers are connected by the control component. The control component is used to control the rotation of the two movable levers to realize the steering of the two cantilever members. The cantilever members and the control component are disposed on opposite sides of the rotating shaft.

[0010] Preferably, the ratchet mechanism includes:

[0011] At least one chuck has a shaft hole on its side wall. The chuck is fitted onto the rotating shaft through the shaft hole and the two are rotatably connected. The chuck is in contact with one of the blades. A notch is opened on the chuck and the notch communicates with the shaft hole.

[0012] Two extension arms are fixedly connected to the two sides of the notch of the chuck, and each extension arm has a flange on the side facing the blade, and the flange is hinged to the extension arm;

[0013] Multiple locking holes are distributed in a circumferential array on the side wall of the blade along the rotating shaft. Two flanges are respectively engaged with one of the locking holes. When the chuck rotates counterclockwise, the two flanges are respectively engaged with the corresponding locking holes. When the chuck rotates clockwise, the two flanges are disengaged from the locking holes.

[0014] Preferably, the blade is an equilateral triangle, and a protrusion is fixed on the outer side of each corner of the blade, with the protrusions on the two blades being arranged opposite each other in a one-to-one correspondence.

[0015] Preferably, the cantilever is V-shaped and has two intersecting cantilever plates, with the ends of the two cantilever plates away from the intersection being fixedly connected to the movable rod.

[0016] Preferably, the protrusion is trapezoidal in shape, having a first base, a second base, and two waist sides. The length of the first base is less than the length of the second base. The first base is fixedly connected to the blade, and the two waist sides are provided with an included angle to the blade.

[0017] Preferably, the control component includes:

[0018] Two sleeves correspond one-to-one with the two movable rods. The sleeves are fitted onto the ends of the movable rods away from the cantilever, and the sleeves are rotatably connected to the movable rods. Limit grooves are provided on the side walls of the sleeves.

[0019] A crossbeam is fixedly connected between the two sleeves;

[0020] Two short handles correspond one-to-one with the two sleeves, and the short handles pass through the limiting grooves on the sleeves and are fixedly connected to the movable rods.

[0021] Preferably, the keel includes:

[0022] Two side panels are respectively fitted at both ends of the rotating shaft. The side panels are attached to the outer side of the corresponding blade. The mulch film core is installed on the front side of the two side panels through a snap-fit ​​structure. Both side panels are provided with gripping holes on the side wall of the rear side of the rotating shaft.

[0023] A curved base plate is fixedly connected to the front side of the two side upright plates;

[0024] A flat base plate is fixed to the rear side of the two side upright plates.

[0025] Preferably, the snap-fit ​​structure includes two grooves on the side plates and a roller that overlaps between the two grooves. The roller is used to insert into the mulch film core, and a limiting member is provided between the snap-fit ​​groove and the roller.

[0026] Preferably, the method for laying sand-fixing mulch film according to any of the above-mentioned sand-fixing mulch film includes the following steps:

[0027] S1. Install the plastic film roll core on one side of the keel, keeping the plastic film roll core parallel to the rotating shaft, and pull the starting end of the plastic film from the plastic film roll core to pass through the bottom of the rotating shaft;

[0028] S2. Fit the lasso onto the protrusions corresponding to the two blades, and adjust the blades so that the lasso is close to the side of the mulch film core and placed on the upper side of the mulch film.

[0029] S3. Adjust the control components to rotate the two movable levers in opposite directions until the two cantilever pieces are placed at the bottom of the mulch film;

[0030] S4. Press down the two movable rods and rotate them clockwise around the pivot to lift the plastic film from the position between the loop and the pivot. At this time, keep the blade and the pivot stationary.

[0031] S5. Adjust the control components to make the two movable rods rotate in opposite directions until the two cantilever pieces rotate out from under the mulch film. Push the movable rods upward to rotate counterclockwise around the pivot. At this time, under the action of the limit component, the movable rods drive the pivot and the blades to rotate counterclockwise synchronously, so that the protrusion drives the lasso to insert the mulch film into the ground.

[0032] S6. Once the mulch film is inserted into the ground, the entire device is moved forward through the gripping holes, and the underground sling automatically detaches from the protrusion, thus achieving one-time screw-ins and fixing of the mulch film.

[0033] S7. After the lasso is released, adjust the protrusion to reset by coordinating the control components, limit components and movable rod, and repeat the steps of S2-S6 to enter the next section of the mulch film for screwing and fixing.

[0034] Compared with the prior art, the sand-fixing mulch film laying device and mulch film laying method of the present invention have the following beneficial effects:

[0035] In use, pull the starting end of the mulch film on the mulch film roll core through the bottom of the rotating shaft, and fit the lasso onto the corresponding protrusions of the two rotating blades. Adjust the rotating blades so that the lasso is close to the mulch film roll core and positioned on top of the mulch film. Then, adjust the control component to rotate the two movable rods in opposite directions until the two cantilever pieces are positioned at the bottom of the mulch film. Next, by pressing down on the two movable rods and rotating them clockwise around the rotating shaft, the mulch film is lifted from the position between the lasso and the rotating shaft. At this point, keep the rotating blades and the rotating shaft stationary, and ensure that one lasso is in contact with the mulch film. Then, use the control component to rotate the two movable rods in the opposite direction until the two cantilever pieces emerge from under the mulch film. At the same time, push the movable rods upward and rotate them counterclockwise around the rotating shaft. Rotation: Under the action of the limiting component, the movable rod drives the rotating shaft and the blade to rotate counterclockwise synchronously, causing the protrusion to drive the lasso to insert the mulch film into the ground. This moves the entire machine forward, and the lasso underground automatically detaches from the protrusion, achieving the screw-ins and fixation of the mulch film. This allows the mulch film to form a longitudinal enclosure and wrap around the sand. Furthermore, the connection between the lasso and the inside of the sand ensures that the mulch film remaining on the outside of the sand has a closer contact with the sand surface. The longitudinal enclosure and wrapping method also allows the mulch film of two adjacent laying units to be taut against the ground, resulting in a good ground adhesion effect, reducing the probability of mulch film damage in harsh environments, and playing a better role in sand fixation and water retention. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0037] Figure 2 This is a first mechanical state diagram of the mulch film laying in an embodiment of the present invention;

[0038] Figure 3 This is a second mechanical state diagram of the mulch film laying in an embodiment of the present invention;

[0039] Figure 4 This is a third mechanical state diagram of the mulch film laying in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the ratchet mechanism in an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Keel; 2. Shaft; 3. Rotary blade; 4. Protrusion; 5. Lasso; 6. Ratchet mechanism; 61. Chuck; 62. Notch; 63. Extension arm; 64. Flange; 65. Locking hole; 7. Control component; 71. Sleeve; 72. Limiting groove; 73. Crossbeam; 74. Short handle; 8. Movable rod; 9. Cantilever component; 10. Side plate; 11. Grip hole; 12. Curved base plate; 13. Flat base plate; 14. Groove; 15. Roller. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0046] See Figures 1 to 5 As shown, in order to quickly complete the longitudinal enclosure and laying of mulch film on sandy soil, significantly improve the efficiency of mulch film laying, and ensure consistent laying standards, this embodiment provides a sand-fixing mulch film laying device, including a keel 1 and a mulch film burying device. The keel 1 is assembled, welded, or stamped from two side upright plates 10, a front curved bottom plate 12, and a rear flat bottom plate 13. It is a rigid support component with strong integrity and serves to connect other components. The front end of the side upright plate 10 realizes the installation of the mulch film core through a snap-fit ​​structure composed of a U-shaped groove 14 and a roller 15. Specifically, the groove 14 is opened on the side upright plate 10, and the roller 15 is rotatably connected in the groove 14. The roller 15 is used to insert into the end of the mulch film core to realize the mechanical installation of the mulch film core. For safety and to ensure the stability of the mulch film core, a limiting component is provided on the upper side of the groove 14. Preferably, the limiting component can be a ring-shaped clamp to limit the displacement of the roller 15. A circular shaft hole is provided in the middle of the side plate 10 for installing the rotating shaft 2, and a long strip hole is provided at the rear end as a gripping hole 11, which is designed to facilitate the operator to grip and lift the entire instrument upward and push it forward.

[0047] Furthermore, in order to facilitate the rapid completion of the longitudinal enclosure and wrapping of the mulch film around the sand, the mulch film laying device in this machine includes a roller assembly, a lasso 5, a ratchet mechanism 6, and a control rod assembly.

[0048] See Figures 1 to 4As shown, the roller assembly includes a rotating shaft 2 and two rotating blades 3. The rotating shaft 2 is rotatably connected to the opposite side walls of the keel 1 through the shaft hole on the side plate 10, and the rotating shaft 2 is parallel to the film roll core. The two rotating blades 3 are respectively fitted and fixed at both ends of the rotating shaft 2. The rotating shaft 2 and the two rotating blades 3 are prefabricated, welded or assembled as a whole. At least one protrusion 4 is fixed on the side of the blade 3. The two protrusions 4 are equidistant from the shaft 2, and the distance from the protrusion 4 to the shaft 2 is greater than the distance from any position of the blade 3 to the shaft 2. The protrusions 4 on the two blades 3 are arranged opposite each other. A lasso 5 is fixed around the two protrusions 4 arranged opposite each other in the two blades 3. Preferably, the lasso 5 is a thin line with high tensile strength, which is manually looped onto the protrusion 4 part of the blade 3. A ratchet mechanism 6 is arranged between the shaft 2 and the inner wall of the blade 3. The ratchet mechanism 6 is used to control the shaft 2 to rotate in a single direction. The control rod assembly includes a control component 7, two movable rods 8, and a cantilever 9 arranged on each movable rod 8. The two movable rods 8 are parallel and rotatably connected to the two ends of the shaft 2, and the movable rods 8 are located on the upper side of the shaft 2. The cantilever 9 is fixed to the lower end of the movable rods 8. The upper ends of the two movable rods 8 are connected through the control component 7. The control component 7 is used to control the rotation of the two movable rods 8 to achieve the steering of the two cantilever 9.

[0049] See Figure 4 and Figure 5 As shown, in order to enable the blade 3 to rotate in a single direction, the ratchet mechanism 6 includes a chuck 61, an extension arm 63, a flange 64, and a chuck hole 65 provided on the blade 3. At least one preferred chuck 61 is provided. When there is one chuck 61, the side wall of the chuck 61 is provided with a shaft hole. The chuck 61 is fitted onto the rotating shaft 2 through the shaft hole and the two are rotatably connected. The chuck 61 is in contact with one of the blades 3. The chuck 61 has a notch 62, which communicates with the shaft hole. An extension arm 63 is fixedly connected to each side of the chuck 61 at the notch 62. Each extension arm 63 has a flange 64 on the side facing the blade 3. The flange 64 is hinged to the extension arm 63. Multiple locking holes 65 are provided on the blade 3 and are distributed in an array along the circumference of the rotating shaft 2 on the side wall of the blade 3. Two flanges 64 are respectively engaged with one locking hole 65. When the chuck 61 rotates counterclockwise, the two flanges 64 are engaged with the corresponding locking holes 65. When the chuck 61 rotates clockwise, the two flanges 64 are disengaged from the locking holes 65. Preferably, in practical applications, two chucks 61 are generally provided. When there are two chucks 61, the two chucks 61 are fitted one-to-one with the two blades 3, which can ensure the stability of operation. Thus, the chucks 61, the extension arm 63, the flange 64, and the chuck holes 65 provided on the blades 3 form a ratchet mechanism 6. When rotated counterclockwise, it can drive the rotating shaft 2 and the blades 3 to rotate synchronously, but when rotated clockwise, it cannot drive them.

[0050] See Figure 1As shown, further, in order to improve the efficiency of mulch film laying, the rotary blade 3 should be set as an equilateral triangle, and a protrusion 4 is fixed on the outer side of each corner of the rotary blade 3. The equilateral triangle design can realize the installation of at least three lassos 5, that is, realize the longitudinal enclosure laying of sand and soil three times, which improves the work efficiency. At the same time, the equilateral triangle makes the adjacent two lassos 5 have a large working space and can maintain the consistency of laying.

[0051] See Figure 1 As shown, furthermore, in order to facilitate the lifting of the mulch film before laying, the cantilever 9 is V-shaped and has two intersecting cantilever plates. The ends of the two cantilever plates away from the intersection are fixed to the movable rod 8.

[0052] See Figure 1 As shown, furthermore, to prevent the lasso 5 from remaining stable when rotating into the sand and to avoid it falling off, thus causing laying failure, the protrusion 4 is trapezoidal in shape, having a first base, a second base, and two waist sides. The length of the first base is less than the length of the second base. The first base is fixed to the rotor blade 3, and the two waist sides are at an angle to the rotor blade 3. Preferably, to ensure that the lasso 5 can fall off during mechanical movement to fix the mulch film in the sand, the angle between the rotor blade 3 and the waist sides is set between 120 degrees and 145 degrees.

[0053] See Figures 2 to 4 As shown, furthermore, to facilitate the rotation of the cantilever 9, the control component 7 includes two sleeves 71, a crossbeam 73, and two short handles 74. The two sleeves 71 correspond one-to-one with the two movable rods 8. The sleeves 71 are fitted onto the ends of the movable rods 8 away from the cantilever 9, and are rotatably connected to the movable rods 8. Limiting grooves 72 are provided on the side walls of the sleeves 71. The crossbeam 73 is fixedly connected between the two sleeves 71. The two short handles 74 correspond one-to-one with the two sleeves 71, and pass through the limiting grooves 72 on the sleeves 71 to be fixedly connected to the movable rods 8.

[0054] See Figures 1 to 5 As shown, the method for laying sand-fixing mulch film according to the above-mentioned sand-fixing mulch film includes the following steps:

[0055] S1. The mobile device reaches the designated position and installs the mulch film core on the front side of the keel 1 through the snap-fit ​​structure. Then, the starting end of the mulch film is pulled through the rotating shaft 2.

[0056] S2. Fit the lasso 5 onto the protrusions 4 corresponding to the two rotating blades 3, and adjust the rotating blades 3 so that the lasso 5 is close to the snap-fit ​​structure and placed on the upper side of the mulch film.

[0057] S3. Adjust the control component 7 to make the two movable rods 8 rotate in opposite directions until the two cantilever pieces 9 are placed at the bottom of the mulch film;

[0058] S4. Press down the two movable rods 8 and rotate them clockwise around the pivot 2 to lift the mulch film from the side closest to the lasso 5. The limiting component keeps the blade 3 and the pivot 2 stationary.

[0059] S5. Adjust the control component 7 to make the two movable rods 8 rotate in opposite directions until the two cantilevered parts 9 rotate out from under the mulch film;

[0060] S6. Push the movable rod 8 upward to rotate counterclockwise around the pivot 2. At this time, under the action of the limiting component, the movable rod 8 drives the pivot 2 and the blade 3 to rotate counterclockwise in sync, so that the protrusion 4 drives the lasso 5 to insert the mulch film into the ground.

[0061] S7. Once the mulch film is inserted into the ground, the entire device is moved forward by pushing it through the gripping hole 11. The underground lasso 5 automatically detaches from the protrusion 4, thus achieving one-time screw-ins and fixing of the mulch film.

[0062] After the lasso 5 is released, the protrusion 4 is reset by coordinating the control component 7, the limiting component and the movable rod 8, and the above steps S2-S7 are repeated to enter the next section of the mulch film for screwing and fixing.

[0063] In summary, the machinery and methods described above are not only inexpensive and easy to produce, but also simple to operate and adaptable to any sand dune slope. They enable the rapid longitudinal enclosure and laying of mulch film on sandy soil, significantly improving the efficiency of mulch film laying and ensuring consistent laying standards.

[0064] Furthermore, the above-mentioned laying method enables the plastic film to be screwed and fixed in the sand, so that the plastic film forms a longitudinal enclosure and wrapping around the sand. By using the connection between the lasso 5 and the inside of the sand, the plastic film on the outside of the sand can maintain a closer contact with the sand surface. Moreover, the longitudinal enclosure and wrapping laying method allows the plastic film of two adjacent laying units to be taut against the ground, which has a good ground adhesion effect, reduces the probability of damage to the plastic film in harsh environments, and plays a better role in sand fixation and water retention.

[0065] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A sand-fixing mulch film laying device, comprising a keel (1) and a mulch film burying device, characterized in that, The mulch film installation device includes: The roller assembly includes a rotating shaft (2) and two blades (3). The rotating shaft (2) is rotatably connected to the opposite side walls of the keel (1). The two blades (3) are respectively fitted and fixed at both ends of the rotating shaft (2). Each blade (3) has at least one protrusion (4) fixed on its side. The two protrusions (4) are equidistant from the rotating shaft (2), and the protrusions (4) on the two blades (3) are arranged opposite to each other. The lasso (5) is fixed around the two protrusions (4) that are oppositely arranged in the two blades (3); A ratchet mechanism (6) is provided between the rotating shaft (2) and the inner wall of the blade (3). The ratchet mechanism (6) is used to control the rotating shaft (2) to rotate in a single direction. The control lever assembly includes a control component (7), two movable levers (8), and a cantilever (9) disposed on each movable lever (8). The two movable levers (8) are parallel and rotatably connected to the two ends of the rotating shaft (2), and the movable levers (8) are located on the upper side of the rotating shaft (2). The cantilever (9) is fixed to the lower end of the movable lever (8). The upper ends of the two movable levers (8) are connected through the control component (7). The control component (7) is used to control the rotation of the two movable levers (8) to achieve the steering of the two cantilever (9). The ratchet mechanism (6) includes: At least one chuck (61) has a shaft hole on its side wall. The chuck (61) is fitted onto the rotating shaft (2) through the shaft hole and the two are rotatably connected. The chuck (61) is in contact with one of the blades (3). The chuck (61) has a notch (62) that communicates with the shaft hole. Two extension arms (63) are respectively fixed to both sides of the notch (62) of the chuck (61). Each extension arm (63) has a flange (64) on the side facing the blade (3). The flange (64) is hinged to the extension arm (63). Multiple locking holes (65) are arranged in a circumferential array along the rotating shaft (2) on the side wall of the blade (3). Two flanges (64) respectively engage with one locking hole (65). When the chuck (61) rotates counterclockwise, the two flanges (64) engage with the corresponding locking holes (65). When the chuck (61) rotates clockwise, the two flanges (64) disengage from the locking holes (65).

2. The sand-fixing mulch film laying device according to claim 1, characterized in that, The blade (3) is an equilateral triangle, and a protrusion (4) is fixed on the outer side of each corner of the blade (3). The protrusions (4) on the two blades (3) are arranged opposite each other.

3. The sand-fixing mulch film laying device according to claim 1, characterized in that, The cantilever (9) is V-shaped and has two intersecting cantilever plates. The ends of the two cantilever plates away from the intersection are fixed to the movable rod (8).

4. The sand-fixing mulch film laying device according to claim 1, characterized in that, The protrusion (4) is trapezoidal in shape, having a first bottom edge, a second bottom edge, and two waist edges. The length of the first bottom edge is less than the length of the second bottom edge. The first bottom edge is fixedly connected to the blade (3), and there is an angle between the two waist edges and the blade (3).

5. The method for laying sand-fixing mulch film using a mulch film laying device according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Install the plastic film roll core on one side of the keel (1), keep the plastic film roll core parallel to the rotating shaft (2), and pull the starting end of the plastic film from the plastic film roll core through the bottom of the rotating shaft (2); S2. Fit the lasso (5) onto the corresponding protrusions (4) of the two rotating blades (3), and adjust the rotating blades (3) so that the lasso (5) is close to the side of the mulch film core and placed on the upper side of the mulch film. S3. Adjust the control component (7) to make the two movable rods (8) rotate in opposite directions until the two cantilever pieces (9) are placed at the bottom of the mulch film; S4. Press down the two movable rods (8) and rotate them clockwise around the pivot (2) to lift the mulch film from the position between the loop (5) and the pivot (2). At this time, keep the blade (3) and the pivot (2) stationary. S5. Adjust the control component (7) to make the two movable rods (8) rotate in opposite directions until the two cantilever pieces (9) rotate out from under the mulch film. Push the movable rod (8) upward to rotate counterclockwise around the pivot (2). At this time, under the action of the limiting component, the movable rod (8) drives the pivot (2) and the blade (3) to rotate counterclockwise in sync, so that the protrusion (4) drives the lasso (5) to insert the mulch film into the ground. S6. After the mulch film is inserted into the ground, the device is pushed forward through the gripping hole (11), and the underground sling (5) automatically detaches from the protrusion (4) to achieve one-time screw insertion and fixing of the mulch film. S7. After the lasso (5) is released, the protrusion (4) is reset by coordinating the control component (7), the limiting component and the movable rod (8), and the above steps S2-S6 are repeated to enter the next section of the mulch film for screw insertion and fixing.

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