Roadbed film covering device

Abstract

The invention relates to the technical field of road construction, and provides a roadbed film covering device. The roadbed film covering device comprises a support, a laying assembly, a cleaning assembly and a returning assembly are arranged on the support, a carrying wheel is arranged at the bottom of the support and rotationally connected with the support, a plurality of collecting plates are arranged on the peripheral face of the carrying wheel, the cleaning assembly comprises a cleaning wheel, and the returning assembly comprises a returning wheel. The back-shifting wheels are arranged on the rear sides of the cleaning wheels in the advancing direction of the support, the two cleaning wheels are arranged on the two sides of the film respectively, and the two back-shifting wheels are arranged on the two sides, away from the film, of the cleaning wheels on the corresponding sides respectively. According to the roadbed film covering device provided by the invention, roadbed soil shoveled by the collecting plate can be raised and fall on the film, the cleaning wheel can remove sundries such as stones on the surface of the roadbed, the back-shifting wheel can shift the removed stones back to the area covered by the film, and in the film laying process, the roadbed soil can be effectively covered by the film. And stone clearing and returning can be completed in time.

Description

Technical Field

[0001] The present application relates to the technical field of road construction, and in particular to a roadbed film covering device. Background Art

[0002] Roadbed refers to the strip structure built as the foundation of the road surface according to the route location and certain technical requirements. It is the foundation of railways and highways. The roadbed is a linear structure built with soil or stone. It is built under good geological, hydrological and climatic conditions. In terms of materials, the roadbed can be divided into three types: soil roadbed, stone roadbed and soil-stone roadbed.

[0003] Road construction may encounter severe weather. Continuous high temperatures and rain can damage the completed roadbed. Traditional film laying devices are prone to encountering stones when the film is pressed down, causing the film to rupture. Stones and other debris need to be manually removed during laying. After laying is completed, soil or stones need to be manually pushed to compact them to prevent them from being blown away by the wind or washed away by rain, resulting in low laying efficiency. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a roadbed film covering device.

[0005] The present application provides a roadbed film covering device, comprising a bracket, on which a laying component, a cleaning component and a call-back component are arranged, and a film is wound on the laying component;

[0006] A transport wheel is provided at the bottom of the bracket, the transport wheel is rotatably connected to the bracket to drive the bracket forward, and a plurality of collecting plates are provided at intervals along the circumferential direction on the outer circumferential surface of the transport wheel for shoveling up roadbed soil;

[0007] The cleaning assembly includes a cleaning wheel, and the return wheel assembly includes a return wheel, the return wheel is arranged on the rear side of the cleaning wheel along the forward direction of the bracket, the number of the cleaning wheel and the return wheel are both two, the two cleaning wheels are arranged on both sides of the film, and the two return wheels are arranged on the corresponding sides of the cleaning wheels away from the two sides of the film.

[0008] Optionally, the cleaning wheel comprises a cleaning wheel body and a plurality of cleaning blades, wherein the plurality of cleaning blades are arranged on the outer peripheral surface of the cleaning wheel body at intervals along the circumferential direction, and the outer peripheral edges of the cleaning wheels on both sides of the film are tangent or at least partially overlap;

[0009] And / or, the return wheel includes a return wheel body and a plurality of return blades, and the plurality of return blades are arranged on the outer circumferential surface of the return wheel body at intervals along the circumferential direction.

[0010] Optionally, the collecting plate includes a first sub-collecting plate and a second sub-collecting plate arranged at an angle, a pouring cone is arranged on the inner side of the conveying wheel facing the film, a plurality of hook plates are arranged at intervals along the circumferential direction on the outer peripheral surface of the pouring cone, and the plurality of hook plates are arranged one-to-one correspondingly to the plurality of the second sub-collecting plates.

[0011] Optionally, the laying assembly includes a core rod and a pressing frame, the film is rolled up on the core rod, one end of the pressing frame is rotatably connected to the bracket, and a first elastic member is arranged between the pressing frame and the bracket, and the other end of the pressing frame is elastically pressed on the film.

[0012] Optionally, the laying assembly includes a laying frame and a breathable cylinder, the breathable cylinder is arranged on the bracket, the laying frame is rotatably arranged on the bracket, the breathable cylinder is arranged inside the laying frame and rotatably cooperates with the laying frame, and the film is rolled on the outside of the laying frame away from the breathable cylinder.

[0013] Optionally, the laying frame includes end plates and support rods, and the number of the support rods is multiple, and the multiple support rods are arranged at intervals along the circumferential direction on the outer circumference of the breathable cylinder, and the support rods are arranged at intervals from the breathable cylinder, and the end plates are provided at both ends of the multiple support rods, and the end plates are rotatably connected to the bracket to drive the support rods to rotate.

[0014] Optionally, the air-permeable cylinder includes a cylinder body and a ventilation mechanism arranged inside the cylinder body, a plurality of through holes are opened on the surface of the cylinder body, the ventilation mechanism includes a fan, the fan has an air inlet end and an air outlet end opposite to each other, the cylinder body located on the air inlet end side of the fan is formed as an adsorption side, and the cylinder body located on the air outlet end side of the fan is formed as a laying side.

[0015] Optionally, the roadbed film covering device also includes a pressing mechanism, which is arranged at the bottom of the bracket, and includes a pressing frame and a pressing wheel rotatably arranged on the pressing frame, one end of the pressing frame is rotatably connected to the bracket, and a second elastic member is arranged between the pressing frame and the bracket, and the pressing wheel is pressed on the film.

[0016] Optionally, the roadbed film covering device also includes a front wheel mechanism, which includes a crushing wheel and an adjusting frame, the crushing wheel is slidably connected to the adjusting frame along the height direction, and a plurality of teeth are arranged on the outer peripheral surface of the crushing wheel at intervals along the circumferential direction for crushing the roadbed soil.

[0017] Optionally, the front wheel mechanism further includes a position control plate and an adjustment rod, and the crushing wheel is arranged on the position control plate and rotatably cooperates with the position control plate;

[0018] The adjusting rod is arranged on the adjusting frame and is rotatably matched with the adjusting frame. A sleeve and a guide slide rod are arranged on the top of the control plate. The sleeve and the adjusting rod are threadedly matched. A plurality of guide holes are opened on the bracket. The sleeve and the guide slide rod are respectively inserted into the guide holes and slidably matched with the guide holes.

[0019] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0020] The roadbed film covering device provided by the present application includes a bracket, on which a laying component, a cleaning component and a dial-back component are arranged, a film is wound on the laying component for covering the roadbed, a conveying wheel is arranged at the bottom of the bracket, the conveying wheel is rotatably connected to the bracket to drive the bracket forward, a plurality of collecting plates are arranged at intervals along the circumferential direction on the outer circumferential surface of the conveying wheel for scooping up roadbed soil, after the film is laid on the roadbed, the roadbed soil scooped up by the collecting plates can be lifted and fall on the film, and then the film is pressed by the roadbed soil to prevent the film from shifting, the cleaning component includes a cleaning wheel, and the dial-back component includes a dial-back wheel, which is arranged on the cleaning wheel along the forward direction of the bracket On the rear side, there are two cleaning wheels and two return wheels. The two cleaning wheels are arranged on both sides of the film, and the two return wheels are arranged on the two sides of the cleaning wheels on the corresponding sides away from the film. During the movement of the roadbed film covering device, the cleaning wheels can first clear the stones and other debris on the roadbed surface, and then cover the film after the stones are removed from the area covered by the film to avoid the stones causing the film to rupture. After the film is covered, the return wheel can push the cleared stones back to the area covered by the film, and the stones can be pressed on the film, thereby pressing the film. In the process of the film being laid following the roadbed film covering device, the stones can be removed and returned in time, thereby improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is a schematic structural diagram of a roadbed film covering device according to an embodiment of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of a roadbed film covering device according to an embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a transport wheel according to an embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a laying assembly according to an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of a pressing mechanism according to an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of driving a cleaning wheel and a return wheel according to an embodiment of the present invention;

[0029] Figure 7 FIG. 1 is a driving schematic diagram of a dial-back wheel according to an embodiment of the present invention.

[0030] In the figure: 1, bracket; 2, laying assembly; 21, core rod; 22, pressing frame; 23, first elastic member; 24, laying frame; 241, end plate; 242, support rod; 25, air cylinder; 251, cylinder; 252, ventilation mechanism; 3, cleaning assembly; 31, cleaning wheel; 311, cleaning wheel body; 312, cleaning blade; 4, return assembly; 41, return wheel; 411, return wheel body; 412, return blade; 5, transport wheel; 51, collection plate; 5 11. First sub-collecting plate; 512. Second sub-collecting plate; 6. Sprinkling cone; 61. Hook plate; 62. Baffle plate; 7. Pressing mechanism; 71. Pressing frame; 72. Pressing wheel; 73. Second elastic member; 74. Pressing plate; 8. Front wheel mechanism; 81. Crushing wheel; 82. Adjusting frame; 83. Positioning plate; 84. Adjusting rod; 85. Sleeve; 86. Guide slide rod; 9. Driving assembly; 91. Driving motor; 92. Transmission gear; 93. Transmission belt; 94. Transmission wheel. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0033] The roadbed film covering device is described in detail below through a specific embodiment:

[0034] Reference Figures 1 to 7As shown, some embodiments of the present invention provide a roadbed film covering device, including a bracket 1, on which a laying component 2, a cleaning component 3 and a call-back component 4 are arranged, and a film is wound on the laying component 2 for covering the roadbed.

[0035] In specific implementation, a transport wheel 5 is provided at the bottom of the bracket 1, and the transport wheel 5 is rotatably connected to the bracket 1 to drive the bracket 1 forward. A plurality of collecting plates 51 are arranged at intervals along the circumferential direction on the outer peripheral surface of the transport wheel 5 for scooping up roadbed soil. After the film is laid on the roadbed, the roadbed soil scooped up by the collecting plate 51 can be lifted and fall on the film, and then the film is pressed by the roadbed soil to prevent the film from being blown up by the wind and avoiding displacement of the film.

[0036] Furthermore, the cleaning component 3 includes a cleaning wheel 31, and the return wheel 41 includes a return wheel 41. The return wheel 41 is arranged on the rear side of the cleaning wheel 31 along the forward direction of the bracket 1. The number of the cleaning wheel 31 and the return wheel 41 is two. The two cleaning wheels 31 are arranged on both sides of the film, and the two return wheels 41 are arranged on both sides of the cleaning wheel 31 on the corresponding side away from the film. During the movement of the roadbed film covering device, the cleaning wheel 31 can first remove stones and other debris on the surface of the roadbed. After the stones are removed from the area covered by the film, the film is covered to prevent the stones from causing the film to rupture. After the film is covered, the return wheel 41 can push the removed stones back to the area covered by the film, and the stones can be pressed on the film, thereby pressing the film. In the process of the film following the roadbed film covering device for laying, the stones can be removed and returned in time, thereby improving the construction efficiency.

[0037] In some embodiments, reference Figure 2 As shown, the cleaning wheel 31 includes a cleaning wheel body 311 and a plurality of cleaning blades 312, and the plurality of cleaning blades 312 are arranged on the outer peripheral surface of the cleaning wheel body 311 at intervals in the circumferential direction. The outer peripheral edges of the cleaning wheels 31 on both sides of the film are tangent or at least partially overlapped. In this way, at the current position, the cleaning wheels 31 on both sides of the film can complete the cleaning of stones in the current area with one rotation, and the cleaning efficiency is high. Specifically, the cleaning blades 312 are formed as arc-shaped blades to increase the space for accommodating stones, thereby increasing the efficiency of cleaning stones, and the openings of the arc-shaped blades face the direction of rotation of the cleaning blades 312.

[0038] Reference Figure 7As shown, the dial-back wheel 41 includes a dial-back wheel body 411 and a plurality of dial-back blades 412, and the plurality of dial-back blades 412 are arranged at intervals along the circumferential direction on the outer circumferential surface of the dial-back wheel body 411. In specific implementation, the dial-back blades 412 are formed as arc-shaped blades to increase the space for accommodating stones, thereby increasing the efficiency of dialing back stones, and the openings of the arc-shaped blades face the direction of rotation of the dial-back blades 412, thereby being able to dial the stones to move toward the film.

[0039] In some embodiments, reference Figure 3 As shown, the collecting plate 51 includes a first sub-collecting plate 511 and a second sub-collecting plate 512 arranged at an angle, that is, the first sub-collecting plate 511 and the second sub-collecting plate 512 are arranged at an angle, so that the transport wheel 5 can scoop up the roadbed soil during the rotation process, and the transport wheel 5 is provided with a pouring cone 6 on the inner side facing the film, and a plurality of hook plates 61 are arranged at intervals along the circumferential direction on the outer circumferential surface of the pouring cone 6, and the plurality of hook plates 61 are arranged one by one corresponding to the plurality of second sub-collecting plates 512. In this way, the roadbed soil scooped up by the first sub-collecting plate 511 and the second sub-collecting plate 512 can be guided to the film through the hook plate 61, and then can be evenly spread on the film. Specifically, a baffle 62 is also provided on the side of the pouring cone 6 away from the transport wheel 5 to prevent the soil from interfering with and affecting the moving shaft of the transport wheel 5.

[0040] Of course, it should be noted that the collecting plate 51 can also be of other structural forms, which is not limited in the present disclosure, as long as the collecting plate 51 can protrude from the surface of the transport wheel 5 and can lift and spread the roadbed soil on the film during travel.

[0041] In some embodiments, reference Figure 2 As shown, the laying assembly 2 includes a core rod 21 and a pressing frame 22. The film is rolled on the core rod 21 and can be pulled out from the core rod 21. One end of the pressing frame 22 is rotatably connected to the bracket 1, and a first elastic member 23 is provided between the pressing frame 22 and the bracket 1. The other end of the pressing frame 22 is elastically pressed on the film. In specific implementation, the pressing frame 22 includes a pressing rod and a swing arm. The swing arm is elastically connected to the bracket 1 through the first elastic member 23. The pressing rod is provided at one end of the swing arm away from the bracket 1. Under the action of the first elastic member 23, the pressing rod can be pressed tightly on the film, thereby appropriately limiting the film to prevent the film from wrinkling before laying, and to prevent the film from being easily torn off the core rod 21 and easily broken.

[0042] Reference Figure 4As shown, the laying assembly 2 includes a laying frame 24 and a breathable cylinder 25, the breathable cylinder 25 is arranged on the bracket 1, the laying frame 24 is rotatably arranged on the bracket 1, the breathable cylinder 25 is arranged inside the laying frame 24, and is rotatably matched with the laying frame 24, and the film is rolled on the outside of the laying frame 24 away from the breathable cylinder 25. It can be understood that during the rotation of the laying frame 24, the film can be driven to move, and then the film is pulled out from the core rod 21, and the film can be laid on the roadbed from the bottom of the laying frame 24 after bypassing the laying frame 24.

[0043] Further, continue to refer to Figure 4 As shown, the laying frame 24 includes an end plate 241 and a support rod 242. The number of the support rods 242 is multiple. The multiple support rods 242 are arranged at intervals on the outer periphery of the air cylinder 25 along the circumferential direction, and the support rods 242 and the air cylinder 25 are arranged at intervals. Both ends of the multiple support rods 242 are provided with end plates 241, and the end plates 241 are rotatably connected with the bracket 1 to drive the support rods 242 to rotate. In other words, the two end plates 241 are respectively arranged on both sides of the roadbed film covering device, the support rod 242 is arranged between the two end plates 241, and the air cylinder 25 is also located between the two end plates 241. The film can be located between the two end plates 241, that is, the film is located inside the laying frame 24, which can prevent the film from falling out.

[0044] Exemplarily, the end plate 241 is formed as a cross-shaped bracket 1, which includes four arms. The number of support rods 242 is four, and the four support rods 242 are arranged on the four arms of the cross-shaped bracket 1, that is, the four support rods 242 are arranged at intervals along the circumferential direction on the outer periphery of the air cylinder 25. The end plate 241 can be driven to rotate by gear meshing to drive the support rods 242 to rotate, thereby driving the film to move.

[0045] In some embodiments, reference Figure 4 and Figure 5 As shown, the air-permeable cylinder 25 includes a cylinder body 251 and a ventilation mechanism 252 arranged inside the cylinder body 251. A plurality of through holes are opened on the surface of the cylinder body 251. The ventilation mechanism 252 includes a fan. The fan has an air inlet end and an air outlet end opposite to each other. The cylinder body 251 located on the air inlet side of the fan is formed as an adsorption side, and the cylinder body 251 located on the air outlet side of the fan is formed as a laying side.

[0046] It can be understood that when the fan blades rotate, they can generate suction at the air inlet end, and then apply suction to the film through the through holes on the cylinder 251 on the adsorption side, so that the film can be adsorbed on the laying frame 24 on the corresponding side to avoid the film from being entangled, folded and twisted. It can also generate blowing force at the air outlet end, and then apply blowing force to the film through the through holes on the cylinder 251 on the laying side, so that the film can be quickly detached from the laying frame 24 on the corresponding side, thereby facilitating the laying of the film.

[0047] Of course, it should be noted that the laying frame 24 and the breathable cylinder 25 are spaced apart, and the film is rolled on the outer side of the laying frame 24 away from the breathable cylinder 25, which can avoid the film covering the outer surface of the breathable cylinder 25 when winding, and further avoid covering the through holes on the cylinder body 251. Only in this way can the suction and blowing effects of the ventilation mechanism 252 be guaranteed, and the laying of the film be guaranteed.

[0048] In some embodiments, reference Figure 1 and Figure 5 As shown, the roadbed film covering device further includes a pressing mechanism 7, which is arranged at the bottom of the bracket 1, and includes a pressing frame 71 and a pressing wheel 72 rotatably arranged on the pressing frame 71, one end of the pressing frame 71 is rotatably connected to the bracket 1, and a second elastic member 73 is arranged between the pressing frame 71 and the bracket 1, and the pressing wheel 72 is pressed on the film. Specifically, the pressing frame 71 can be connected to the bracket 1 through a pressing plate 74.

[0049] It can be understood that the film detached from the laying frame 24 can be pressed on the roadbed through the bottom of the pressing wheel 72 to complete the laying. At the same time, through the setting of the second elastic member 73, the pressing wheel 72 can move relative to the bracket 1. When encountering larger stones, the pressing wheel 72 can move toward the bracket 1 to retract and pass over the stone, thereby avoiding the pressing wheel 72 directly contacting the stone and causing the film to rupture, thereby avoiding the problem of the film rupture caused by stones when laying over a large area.

[0050] In some embodiments, reference Figure 1 and Figure 2 As shown, the roadbed film covering device also includes a front wheel mechanism 8, which includes a crushing wheel 81 and an adjustment frame 82. The outer peripheral surface of the crushing wheel 81 is provided with a plurality of teeth spaced in the circumferential direction, which are used to crush the roadbed soil to make the roadbed soil soft, so that the transport wheel 5 can be lifted and spread the roadbed soil after the crushing wheel 81 passes. Furthermore, the crushing wheel 81 is slidably connected with the adjustment frame 82 in the height direction to adapt to various roadbeds, improve the applicability, and facilitate operation.

[0051] When implementing it, refer to Figure 2As shown, the front wheel mechanism 8 also includes a control plate 83 and an adjustment rod 84. The crushing wheel 81 is arranged on the control plate 83 and rotates with the control plate 83; the adjustment rod 84 is arranged on the adjustment frame 82 and rotates with the adjustment frame 82. A sleeve 85 and a guide slide bar 86 are arranged on the top of the control plate 83. The sleeve 85 and the adjustment rod 84 are threadedly matched. A plurality of guide holes are provided on the bracket 1. The sleeve 85 and the guide slide bar 86 are respectively inserted into the guide holes and slide with the guide holes. It can be understood that by rotating the adjustment rod 84, the sleeve 85 can move in the height direction relative to the adjustment rod 84. Through the limit fit between the guide slide bar 86 and the guide hole, the sleeve 85 and the control plate 83 can be guided to move up and down, and then the height of the crushing wheel 81 relative to the bracket 1 can be adjusted to improve practicality.

[0052] In some embodiments, reference Figure 6 As shown, the roadbed film covering device also includes a driving component 9, which includes a driving motor 91, a transmission gear 92, a transmission belt 93 and a transmission wheel 94. Specifically, the cleaning wheel 31, the return wheel 41 and the transport wheel 5 can be driven by each other through the driving component 9. The present disclosure does not limit this and can be specifically set according to actual needs.

[0053] When the roadbed film covering device of the present application is in use, first remove the core rod 21 and install the cylindrical film on the outer surface of the core rod 21. After passing through the pressing frame 22, the film can be rolled on the outside of the laying frame 24 and pass under the pressing mechanism 7. When laying is required, first start the drive motor 91 to drive the conveying wheel 5 to rotate, thereby driving the bracket 1 forward. The crushing wheel 81 is pushed and rolls to press the soil on both sides of the roadbed. By starting the ventilation mechanism 252, the air flow in the air cylinder 25 can be driven to flow rapidly, so that the upper part of the air cylinder 25 generates suction and the lower part generates blowing force. The driving motor 91 can also drive the laying frame 24 to roll. With the cooperation of the pressing wheel 72, the film can be pressed to fit the roadbed. When encountering stones or other protrusions, the pressing frame 71 can squeeze the second elastic member 73 to shrink to pass over the protrusion.

[0054] At the same time, when the transport wheel 5 rotates and moves, the collecting plate 51 can scoop up the roadbed soil that is softened by the crushing wheel 81, and the roadbed soil can enter the hook plate 61 and be poured along the pouring cone 6 onto the surface of the laid film to prevent the film from being blown away by the wind. At the same time, when the roadbed film covering device moves, the cleaning wheel 31 rotates to remove stones and other debris at the front end of the device to prevent the film from being broken during laying. At the same time, when the return wheel 41 passes the current position, the return wheel 41 can rotate and push stones and other debris on both sides of the roadbed and press them onto the film to prevent rainwater from eroding wrinkles in the film.

[0055] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A roadbed film covering device, characterized in that: It comprises a support (1), on which a laying component (2), a cleaning component (3) and a call-back component (4) are arranged, and a film is wound on the laying component (2); A transport wheel (5) is provided at the bottom of the support (1), the transport wheel (5) is rotatably connected to the support (1) to drive the support (1) forward, and a plurality of collecting plates (51) are provided at intervals along the circumferential direction on the outer circumferential surface of the transport wheel (5) for shoveling up roadbed soil; The cleaning assembly (3) comprises a cleaning wheel (31), and the return wheel (4) comprises a return wheel (41). The return wheel (41) is arranged at the rear side of the cleaning wheel (31) along the forward direction of the bracket (1). The number of the cleaning wheel (31) and the return wheel (41) are both two. The two cleaning wheels (31) are arranged on both sides of the film, and the two return wheels (41) are arranged on the two sides of the cleaning wheel (31) on the corresponding sides away from the film.

2. The roadbed film covering device according to claim 1, characterized in that: The cleaning wheel (31) comprises a cleaning wheel body (311) and a plurality of cleaning blades (312), wherein the plurality of cleaning blades (312) are arranged at intervals along the circumferential direction on the outer peripheral surface of the cleaning wheel body (311), and the outer peripheral edges of the cleaning wheel (31) on both sides of the film are tangent or at least partially overlap; And / or, the dial-back wheel (41) comprises a dial-back wheel body (411) and a plurality of dial-back blades (412), and the plurality of dial-back blades (412) are arranged on the outer circumferential surface of the dial-back wheel body (411) at intervals along the circumferential direction.

3. The roadbed film covering device according to claim 1, characterized in that: The collecting plate (51) comprises a first sub-collecting plate (511) and a second sub-collecting plate (512) which are arranged at an angle, and a pouring cone (6) is arranged on the inner side of the conveying wheel (5) facing the film, and a plurality of hook plates (61) are arranged on the outer peripheral surface of the pouring cone (6) at intervals in the circumferential direction, and the plurality of hook plates (61) are arranged in a one-to-one correspondence with the plurality of the second sub-collecting plates (512).

4. The roadbed film covering device according to claim 1, characterized in that: The laying assembly (2) comprises a core rod (21) and a pressing frame (22), the film is rolled up on the core rod (21), one end of the pressing frame (22) is rotatably connected to the bracket (1), and a first elastic member (23) is provided between the pressing frame (22) and the bracket (1), and the other end of the pressing frame (22) is elastically pressed on the film.

5. The roadbed film covering device according to claim 1, characterized in that: The laying assembly (2) comprises a laying frame (24) and a breathable cylinder (25); the breathable cylinder (25) is arranged on the bracket (1); the laying frame (24) is rotatably arranged on the bracket (1); the breathable cylinder (25) is arranged inside the laying frame (24) and rotatably cooperates with the laying frame (24); the film is rolled up on the outside of the laying frame (24) away from the breathable cylinder (25).

6. The roadbed film covering device according to claim 5, characterized in that: The laying frame (24) comprises an end plate (241) and a support rod (242). The number of the support rods (242) is plural. The plural support rods (242) are arranged at intervals on the outer periphery of the breathable cylinder (25) along the circumferential direction, and the support rods (242) and the breathable cylinder (25) are arranged at intervals. The end plates (241) are provided at both ends of the plural support rods (242). The end plates (241) are rotatably connected to the bracket (1) to drive the support rods (242) to rotate.

7. The roadbed film covering device according to claim 5, characterized in that: The ventilation cylinder (25) comprises a cylinder body (251) and a ventilation mechanism (252) arranged inside the cylinder body (251); a plurality of through holes are provided on the surface of the cylinder body (251); the ventilation mechanism (252) comprises a fan, the fan having an air inlet end and an air outlet end opposite to each other; the cylinder body (251) located on the air inlet side of the fan forms an adsorption side, and the cylinder body (251) located on the air outlet side of the fan forms a laying side.

8. The roadbed film covering device according to any one of claims 1 to 7, characterized in that: The roadbed film covering device also includes a pressing mechanism (7), the pressing mechanism (7) is arranged at the bottom of the support (1), the pressing mechanism (7) includes a pressing frame (71) and a pressing wheel (72) rotatably arranged on the pressing frame (71), one end of the pressing frame (71) is rotatably connected to the support (1), and a second elastic member (73) is arranged between the pressing frame (71) and the support (1), and the pressing wheel (72) is pressed on the film.

9. The roadbed film covering device according to any one of claims 1 to 7, characterized in that: The roadbed film covering device also includes a front wheel mechanism (8), the front wheel mechanism (8) includes a crushing wheel (81) and an adjustment frame (82), the crushing wheel (81) is slidably connected to the adjustment frame (82) along the height direction, and a plurality of teeth are arranged on the outer peripheral surface of the crushing wheel (81) at intervals along the circumferential direction for crushing roadbed soil.

10. The roadbed film covering device according to claim 9, characterized in that: The front wheel mechanism (8) further comprises a position control plate (83) and an adjustment rod (84), and the crushing wheel (81) is arranged on the position control plate (83) and is rotationally matched with the position control plate (83); The adjusting rod (84) is arranged on the adjusting frame (82) and is rotatably matched with the adjusting frame (82); a sleeve (85) and a guide slide rod (86) are arranged on the top of the control plate (83); the sleeve (85) and the adjusting rod (84) are threadedly matched; a plurality of guide holes are opened on the bracket (1); the sleeve (85) and the guide slide rod (86) are respectively inserted into the guide holes and are slidably matched with the guide holes.

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