Three-station sand barrier laying device and using method thereof

Abstract

The invention belongs to the technical field of sand control equipment, and particularly relates to a three-station sand barrier laying device and a using method thereof. The structure of the device comprises a vehicle body, wheels and a grass pressing disc, and further comprises three grass pressing assemblies, and the grass pressing assembly with the grass pressing disc located between two wheel paths is arranged at the front end of the vehicle body in the advancing direction; the two grass pressing assemblies located on the two sides of the paths of the two wheels are arranged at the rear end of the vehicle body in the advancing direction. The three-station sand barrier laying device at least has the beneficial effects that in one-time sand barrier laying operation, three sand barriers can be obtained at the same time, it can be guaranteed that the vertical straw mats cannot be pressed down by wheel paths, and finally the sand barrier laying operation is relatively more efficient.

Description

Technical Field

[0001] This application belongs to the field of desertification control equipment technology, and in particular relates to a three-station sand barrier laying device and its usage method. Background Technology

[0002] Sand barriers, also known as mechanical sand barriers or wind barriers, commonly include straw checkerboard sand barriers. These barriers are made of materials such as straw and stalks, and are arranged in a continuous "grid" shape. They are used to block and fix the sand within the grid, thus achieving a significant sand control effect.

[0003] On the other hand, straw checkerboard sand barriers can be laid both manually and mechanically, the latter corresponding to the aforementioned sand barrier laying device. The principle of mechanized laying of straw checkerboard sand barriers is mainly as follows: As the rolling tamping disc continues to lower the straw mat, the middle part of the straw mat can be pressed down into the sand layer by the tamping disc itself, making it into a "V" shape, which will eventually vertically block the sand.

[0004] By repeatedly laying and pressing down the straw mats in the horizontal and vertical directions using the aforementioned sand barrier laying device, the aforementioned "grid" straw sand barrier pattern can be obtained.

[0005] Correspondingly, the existing common sand barrier laying devices mainly consist of a mobile vehicle, a straw curtain roll mounting frame, and a straw pressing disc, which can achieve a basic and much more efficient mechanized laying effect than manual laying methods.

[0006] Furthermore, improved sand barrier laying devices with even higher laying efficiency have emerged. For example, Chinese invention patent application CN119571789A, published on March 7, 2025, discloses a multi-functional grass presser, whose main structural components include: a grass presser body, a driver's cab, a control mechanism, rollers, a first chute, a laying component, a grass pressing component, and a telescopic mechanism.

[0007] The multi-functional grass presser in this patent document has the following main functions and advantages: the grass pressing component adjusts the spacing between the grass pressing disc and the grass being laid, and the grass pressing disc has a certain degree of flexibility, which can provide a certain buffering effect when encountering hard stones, thereby preventing the grass pressing disc from curling.

[0008] However, in actual use, this multi-functional grass press still has at least the following relatively inefficient problems, specifically: First, it has two grass pressing trays, so only two sand barriers can be obtained in a single trip, which is relatively inefficient; Second, the moving path of the roller structure falls within the left and right position adjustment range of the grass pressing disc, so the roller can not only flatten the already vertical and completed sand barrier, but also can compact the sand in advance, which increases the difficulty of subsequent grass pressing operation, both of which are inefficient and disadvantageous. SUMMARY

[0009] The application provides a three-station sand barrier laying device, which aims to simultaneously and efficiently obtain three sand barriers in one sand barrier laying operation.

[0010] In addition, the application also provides a use method of the above-mentioned sand barrier laying device.

[0011] The application solves the above-mentioned problems by adopting the technical scheme of a three-station sand barrier laying device, which comprises a vehicle body, wheels, and a grass pressing disc, and further comprises three grass pressing assemblies, wherein the front end position of the travel direction of the vehicle body is provided with one grass pressing assembly, and the grass pressing disc is located between the two wheel paths; the rear end position of the travel direction of the vehicle body is provided with two grass pressing assemblies, which are respectively located at the left and right positions of the two wheel paths.

[0012] Further preferred technical schemes are that the application further comprises a transverse widening plate provided on the vehicle body and located at the rear end position of the travel direction of the vehicle body, and three groups of mounting plates provided at the front end position of the travel direction of the vehicle body and the two end positions of the transverse widening plate.

[0013] Further preferred technical schemes are that the grass pressing assembly comprises a hinged frame unit provided on the vehicle body and used for coarsely adjusting the sand layer entering depth of the grass pressing disc, an extension frame unit provided on the hinged frame unit and used for finely adjusting the sand layer entering depth of the grass pressing disc, a support frame unit provided on the extension frame unit and used for mounting the grass pressing disc, and a support rod provided on the support frame unit and used for sleeving the grass screen roll.

[0014] Further preferred technical schemes are that the hinged frame unit comprises two screw plates used for connecting the vehicle body, a rotatable plate hingedly provided at one end of the screw plate, an intermediate plate provided on the two rotatable plates and used for supporting the extension frame unit, and a coarse adjustment extension rod provided on the screw plate and the rotatable plate.

[0015] Further preferably, the telescopic frame body unit comprises two fine adjustment telescopic rods respectively hingedly arranged on the two rotatable plates, a connecting plate hingedly arranged on the two fine adjustment telescopic rods and used for mounting the support frame body unit, and two vertical limiting blocks arranged on the connecting plate and respectively located at upper and lower sides of the intermediate plate.

[0016] Further preferably, the support frame body unit comprises a bottom frame arranged on the connecting plate, a vertical frame arranged on the bottom frame and used for mounting the support rod, a front end vertical plate arranged on the bottom frame and used for mounting the grass pressing disc, and a rear end vertical plate arranged on the bottom frame and connected with the grass pressing disc and used for transversely clamping the vertical limiting block.

[0017] Further preferably, the support frame body unit further comprises two L-shaped widened plates respectively connected with the bottom frame and the rear end vertical plate at upper and lower ends and allowing transverse adjustment of the mounting position of the support frame body unit.

[0018] Further preferably, the support frame body unit further comprises a vertical slot arranged on the rear end vertical plate, and a telescopic rod arranged on the vertical slot and used for transversely fixing the support frame body unit by pulling out upward to transversely block the vertical limiting block.

[0019] Further preferably, the support frame body unit further comprises a fixing slot arranged on the lower surface of the bottom frame and used for inserting the telescopic rod.

[0020] A use method of the three-station sand fence laying device: the transverse relative position of the grass pressing disc with respect to the two wheel paths is adjusted by transverse rotation of the fine adjustment telescopic rod and / or transverse sliding of the support frame body unit.

[0021] The beneficial effects of the present application include at least the following eight points.

[0022] Firstly, the three-station sand fence laying device can simultaneously obtain three sand fences in one sand fence laying operation and can ensure that the wheel path does not step on the already vertical grass screen, thereby making the sand fence laying operation relatively more efficient.

[0023] Secondly, the grass pressing disc in the device can be vertically rotated and adjusted and can be telescoped along the length direction of the hinged frame body unit, the former corresponds to the coarse adjustment of the depth of the grass pressing disc into the sand layer, and the latter corresponds to the fine adjustment of the depth of the grass pressing disc, thereby making the sand fence laying operation of the grass screen pressing method more flexible and practical, and being suitable for different materials and sizes of the grass screen.

[0024] Third, the overall profile shape of the telescopic frame unit is a parallelogram, combined with the "instability" of the parallelogram, the telescopic frame unit can be used as the first way of adjusting the lateral position of the grass pressing disc.

[0025] Fourth, the overall structure of the support frame unit with the grass pressing disc can also slide laterally on the telescopic frame unit, serving as the second way of adjusting the lateral position of the grass pressing disc, and is independent of the above-mentioned first way, whether combined or not, ultimately ensuring that the left and right position adjustment operation of the grass pressing disc is more flexible and efficient.

[0026] Fifth, the telescopic frame unit includes two vertical limiting blocks, which can prevent the relatively large weight of the grass mat roll and the reaction force of the grass pressing disc from breaking or damaging the fine adjustment telescopic rod by vertically abutting the middle plate.

[0027] Sixth, the support frame unit can provide size limitation for the above-mentioned second way of adjusting the lateral position of the grass pressing disc, avoid excessive lateral displacement, avoid lateral falling, can also be limited and fixed in the front and back directions of the telescopic frame unit, avoid the support frame unit from falling forward, and can also reinforce the structural strength of the support frame unit to ensure stable installation of the grass pressing disc.

[0028] Seventh, for the vertical limiting block, its role is dual: in the upward and downward directions, it blocks and protects the telescopic frame unit, ultimately mainly protecting the two fine adjustment telescopic rods; in the lateral direction, it blocks and limits the support frame unit, avoiding the support frame unit from falling and falling due to large sliding, thus further improving the compactness and simplicity of the structure of the three-station sand barrier laying device.

[0029] Eighth, the lateral displacement amplitude of the above-mentioned support frame unit with the grass pressing disc is relatively small, which cannot cause any overlap between the position of the grass pressing disc and the drop position of the grass mat roll and the vehicle wheel path, and the above-mentioned lateral adjustment can make the sand barrier avoid the various protruding structures that may be added below the vehicle body, avoiding the sand barrier from being pressed down and distorted, which is crucial for the subsequent "oil to electricity" environmental protection operation of the sand barrier laying vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure diagram of the grass pressing assembly in the present application.

[0031] Figure 2 It is a position diagram of the lateral widening plate and the mounting plate in the present application from the perspective of the top view.

[0032] Figure 3 It is a structure diagram of the hinged frame unit in the present application.

[0033] Figure 4 Figure 1 is a schematic diagram of the position structure of the telescopic frame unit in the present application.

[0034] Figure 5 Figure 2 is a schematic diagram of the first structure of the support frame unit in the present application.

[0035] Figure 6 Figure 3 is a schematic diagram of the second structure of the support frame unit in the present application.

[0036] Figure 7 Figure 4 is a schematic diagram of the third structure of the support frame unit in the present application.

[0037] Figure 8 Figure 5 is a schematic diagram of the use of the grass-pressing disc in the present application.

[0038] Figure 9 Figure 6 is a schematic diagram of the parallelogram contour of the telescopic frame unit in the present application.

[0039] Figure 10 Figure 7 is a schematic diagram of the position of the front-end protruding hinge shaft in the present application.

[0040] Figure 11 Figure 8 is a schematic diagram of the use of the front-end protruding hinge shaft to block and limit the support frame unit in the present application, which can be used in combination with the L-shaped widening plate or the telescopic rod.

[0041] In the figure, the meanings of the respective marks are as follows.

[0042] Grass-pressing disc a, sand ground b, forward direction c; Vehicle body 11, wheel 12, grass-pressing disc 13; Transverse widening plate 1, mounting plate 2, hinge frame unit 3, telescopic frame unit 4, support frame unit 5, support rod 6; Screwed plate 301, rotatable plate 302, intermediate plate 303, coarse adjustment telescopic rod 304; Fine adjustment telescopic rod 401, connecting plate 402, vertical limiting block 403, front-end protruding hinge shaft 404; Bottom frame 501, vertical frame 502, front-end vertical plate 503, rear-end vertical plate 504, L-shaped widening plate 505, vertical slot 506, telescopic rod 507, fixing slot 508, bottom frame inner limiting rod 509. DETAILED DESCRIPTION

[0043] The following description is merely a preferred embodiment of the present application, and is not intended to limit the scope of the present application.

[0044] As Figures 1-11As shown, a three-station sand barrier laying device, the structure comprises a vehicle body 11, wheels 12, and a grass pressing disc 13, and further comprises three grass pressing assemblies, wherein, at the front end position of the vehicle body 11 in the direction of travel, one grass pressing assembly is arranged between the two wheel paths of the grass pressing disc 13; at the rear end position of the vehicle body 11 in the direction of travel, two grass pressing assemblies are arranged respectively at the positions on both sides of the two wheel paths.

[0045] In this embodiment, as shown in the attached Figure 8 As shown, the grass mat lower position of the grass mat roll a is located in front of the grass pressing disc 13 in the direction of travel. Therefore, the middle position of the strip-shaped grass mat can be pressed into the sand ground b by the grass pressing disc 13, and the two sides of the grass mat are immediately raised upward, and finally a sand barrier structure is formed. The sand barrier laying vehicle repeatedly moves in the transverse and longitudinal directions of the sand ground b, and finally the above-mentioned grass square sand barrier is obtained.

[0046] Among them, the number of wheels 12 is 4, the number of grass pressing discs 13 and grass pressing assemblies is 3 one-to-one, that is, there is one grass pressing assembly in front, right rear and left rear of the vehicle body 11, and finally three sand barriers can be obtained at one time of sand barrier laying operation.

[0047] In addition, the two wheel paths formed by the above-mentioned four wheels 12 are staggered by three grass pressing discs 13 in the transverse direction, that is, the width direction of the vehicle body 11, so that the wheels 12 can avoid pressing the already vertical grass mat again, and finally ensure the efficiency of the sand barrier laying operation.

[0048] The three-station sand barrier laying device further comprises a transverse widening plate 1 arranged on the vehicle body 11 and located at the rear end position of the vehicle body 11 in the direction of travel, and three groups of mounting plates 2 arranged at the front end position of the vehicle body 11 in the direction of travel and the two end positions of the transverse widening plate 1.

[0049] In this embodiment, the transverse widening plate 1 and the mounting plate 2 are fixedly connected with the vehicle body 11. The length of the transverse widening plate 1 is greater than the width of the vehicle body 11, and the mounting plate 2 is screwed with the grass pressing assembly.

[0050] The grass pressing assembly comprises a hinged frame body unit 3 arranged on the vehicle body 11 and used for coarsely adjusting the sand layer entering depth of the grass pressing disc 13, a telescopic frame body unit 4 arranged on the hinged frame body unit 3 and used for finely adjusting the sand layer entering depth of the grass pressing disc 13, a support frame body unit 5 arranged on the telescopic frame body unit 4 and used for mounting the grass pressing disc 13, and a support rod 6 arranged on the support frame body unit 5 and used for sleeving the grass mat roll a.

[0051] In this embodiment, the main body material of the grass compression assembly is high-strength steel. The main body shape of the articulated frame unit 3 is "U-shaped", and two mounting plates 2 are screwed at both ends thereof. The main body shape of the telescopic frame unit 4 is also "U-shaped", and both ends thereof are articulated with the articulated frame unit 3, and the total weight of the support frame unit 5, the grass compression disc 13 and the grass mat roll a is loaded thereon.

[0052] On the other hand, after the support rod 6 passes through the grass mat roll a, both ends thereof are erected on the support frame unit 5, so that the grass mat roll a is located above the grass compression disc 13, and the "powerless unwinding" effect of the grass mat roll a can be achieved through the pulling action of the grass compression disc 13, thereby finally ensuring that the sand barrier can be continuously laid.

[0053] The articulated frame unit 3 comprises two screw plates 301 for connecting the vehicle body 11, a rotatable plate 302 articulated at one end of the screw plates 301, an intermediate plate 303 arranged on the two rotatable plates 302 and used for supporting the telescopic frame unit 4, and a coarse adjustment telescopic rod 304 arranged on the screw plates 301 and the rotatable plate 302.

[0054] In this embodiment, the screw plates 301 are rectangular or trapezoidal in shape, and a plurality of openings are provided thereon, so that the depth of the grass compression disc 13 into the sand ground b can be preliminarily adjusted during the initial overall installation stage of the grass compression assembly, thereby reducing the workload of the coarse adjustment telescopic rod 304.

[0055] In addition, the two rotatable plates 302 and the intermediate plate 303 are integrally formed to form the above-mentioned "U-shaped" structure, and finally the grass compression disc 13 can be indirectly installed on the vehicle body 11.

[0056] The telescopic frame unit 4 comprises two fine adjustment telescopic rods 401 respectively articulated on the two rotatable plates 302, a connecting plate 402 articulated on the two fine adjustment telescopic rods 401 and used for mounting the support frame unit 5, and two vertical limiting blocks 403 arranged on the connecting plate 402 and respectively located at the upper and lower sides of the intermediate plate 303. In this embodiment, the coarse adjustment telescopic rod 304 and the fine adjustment telescopic rod 401 are both hydraulic cylinders, and the length, diameter parameters and maximum extension amount of the former are all greater than those of the latter, which is the origin of the above-mentioned "coarse adjustment and fine adjustment".

[0057] For example, the coarse adjustment telescopic rod 304 pulls the rotatable plate 302 to rotate and swing, which can adjust the vertical height of the grass pressing disc 13 by a maximum of 40cm. The fine adjustment telescopic rod 401 extends and retracts the connecting plate 402, which can adjust the vertical height of the grass pressing disc 13 by a maximum of 10cm. Ultimately, this makes the depth of the grass pressing disc 13 into the sand b more flexible and adjustable, and also makes the sand barrier laying device adaptable to grass curtains of various materials and specifications.

[0058] At this point, the two ends of the fine-tuning telescopic rod 401 can be welded, screwed, or hinged, but they cannot, or at least cannot, significantly bear the weight of the support frame unit 5 and its components. Therefore, this is one of the main functions of the vertical limiting block 403.

[0059] On the other hand, before the straw mat roll a is installed, the straw pressing disc 13 is inserted into the sand b, so that the supporting part of the straw pressing disc 13 bears the weight of the straw mat roll a, thereby reducing the stress intensity at the vertical limiting block 403.

[0060] The support frame unit 5 includes a bottom frame 501 disposed on the connecting plate 402, a vertical frame 502 disposed on the bottom frame 501 and used to install the support rod 6, a front vertical plate 503 disposed on the bottom frame 501 and used to install the grass pressing disc 13, and a rear vertical plate 504 disposed on the bottom frame 501, connected to the grass pressing disc 13, and used to laterally engage the vertical limiting block 403.

[0061] In this embodiment, both the bottom frame 501 and the vertical frame 502 consist of multiple integrally welded steel pipes or plates. The upper end of the vertical frame 502 is provided with an opening and closing position that sufficiently fixes the support rod 6, such as a common locking structure.

[0062] Furthermore, there are two of each of the front vertical plate 503 and the rear vertical plate 504, with the "front" and "rear" markings corresponding to the direction of travel of the vehicle body 11. The mounting accessories for the grass compactor 13, such as two horizontal connecting plates, are connected to the four vertical plates mentioned above to ensure the grass compactor 13 is securely installed.

[0063] Under this structural style, as shown in the appendix Figure 5 As shown, the distance between the two rear vertical plates 504, minus the width of the vertical limiting block 403, is the maximum lateral adjustment range of the support frame unit 5. The two vertical limiting blocks 403 have the same length and width dimensions and are aligned left and right.

[0064] The support frame body unit 5 further comprises two L-shaped widened plates 505, which are respectively connected to the bottom frame 501 and the rear end vertical plate 504, and allow the support frame body unit 5 to be transversely adjusted and installed.

[0065] In the embodiment, the second structure of the support frame body unit 5, that is, between the bottom frame 501 and the rear end vertical plate 504, is further provided with the L-shaped widened plate 505.

[0066] The main reason for providing the L-shaped widened plate 505 is that in order to stably install the grass crushing disc 13, the width between the two front end vertical plates 503 and the width between the two rear end vertical plates 504 cannot be relatively large, otherwise the grass crushing disc 13 is easy to shake left and right; at the same time, the vertical limiting block 403 cannot be too narrow, otherwise it cannot provide sufficient structural strength.

[0067] Therefore, the main function of the L-shaped widened plate 505 is to increase the left and right movable range of the support frame body unit 5, and improve the practicability of the left and right displacement adjustment function of the grass crushing disc 13. For example, the maximum single-side moving distance of the support frame body unit 5 is increased from 2 cm to 10 cm.

[0068] At the same time, the bottom frame 501, the L-shaped widened plate 505 and the rear end vertical plate 504 are integrally formed or welded, which does not affect the effective installation of the grass crushing disc 13.

[0069] The support frame body unit 5 further comprises a vertical slot 506 provided on the rear end vertical plate 504, and a telescopic rod 507 provided on the vertical slot 506 and used for transversely fixing the support frame body unit 5 by pulling upward to block the vertical limiting block 403 transversely.

[0070] In the embodiment, the third structure of the support frame body unit 5, that is, the L-shaped widened plate 505 is used in cooperation with the telescopic rod 507, so that the relatively wide transverse adjustment range provided by the L-shaped widened plate 505 can be divided, or the "widening" function of the above transverse adjustment range can be closed, to avoid the inevitable left and right shaking of the support frame body unit 5 from being too large, so that the "large" adjustment range and the "small" shaking amplitude can be achieved.

[0071] Specifically, the support frame body unit 5 can be first adjusted to slide into three sub-zones between the two L-shaped widened plates 505, which are further divided by the two telescopic rods 507, and then at least one telescopic rod 507 is pulled up, so that the above-mentioned combined effect can be achieved. For details, please refer to the accompanying drawings. Figure 7 .

[0072] The support frame body unit 5 further comprises a fixed groove 508 arranged on the lower surface of the bottom frame 501 and used for inserting the telescopic rod 507.

[0073] In the embodiment, the upper end of the telescopic rod 507 is in interference fit with the fixed groove 508, so that the telescopic rod 507 also has the effect of reinforcing the support frame body unit 5. At this time, the rear end vertical plate 504 and the vertical frame 502 are fixed together by the telescopic rod 507 and the L-shaped widened plate 505, so that the installation stability of the grass pressing disc 13 is relatively higher.

[0074] A method for using the three-station sand fence laying device: the relative position of the grass pressing disc 13 to the two wheel paths is adjusted by transversely rotating the fine adjustment telescopic rod 401 and / or transversely sliding the support frame body unit 5.

[0075] In the embodiment, the installation mode of the fine adjustment telescopic rod 401 is set as 2-end hinged, that is, the front end protruding hinged shaft 404 is included. At this time, the profile shape of the telescopic frame body unit 4 is a parallelogram.

[0076] Therefore, the fine adjustment telescopic rod 401 can be first transversely rotated and adjusted and then tightened and fixed, so that the depth adjustment mode of the grass pressing disc 13 into the sand is more flexible and comprehensive. Correspondingly, the two ends of the fine adjustment telescopic rod 401 abut against the middle plate 303, or the front end side of the connecting plate 402 abuts against the middle plate 303, that is, the maximum rotation swing amplitude of the telescopic frame body unit 4.

[0077] On the other hand, for the support frame body unit 5, the maximum adjustment amplitude and the limiting effect after adjustment are also important, and it is necessary to avoid that the telescopic rod 507 is broken by the vertical limiting block 403. Therefore, as shown in the accompanying drawings, the upper end of the front end protruding hinged shaft 404 is protruded in order to transversely block the end head plate / rod of the bottom frame inner limiting rod 509 and / or the vertical frame 502, so that the end head plate / rod of the bottom frame inner limiting rod 509 and the vertical frame 502 can be transversely limited together with the telescopic rod 507. Figure 10 、 11

[0078] Specifically, as shown in the accompanying drawings, when the vertical limiting block 403 is located between the two telescopic rods 507, the vertical limiting block 403 abuts against the telescopic rod 507, and at the same time, the protruded upper end of the front end protruding hinged shaft 404 abuts against the end head plate / rod of the vertical frame 502, so as to finally improve the transverse limiting effect of the support frame body unit 5 and avoid that the telescopic rod 507 is broken. Figure 5 ​​

[0079] As attached Figure 7 As shown, when the vertical limiting block 403 is located between the L-shaped widening plate 505 and the telescopic rod 507 on the left, the upper end of the protruding hinge shaft 404 on the right side is located between the inner limiting rod 509 of the bottom frame on the right and the end plate / rod on the right side of the vertical frame 502. This causes the blocking action of the vertical limiting block 403 to occur simultaneously with the blocking action of the protruding upper end, ultimately limiting and protecting the entire support frame unit 5 and the structural protection telescopic rod 507.

[0080] Correspondingly, there are also two limiting rods 509 in the bottom frame, which is the same as the number of telescopic rods 507.

[0081] Before the sand barrier laying device is used, the support frame unit 5 can be temporarily lifted by hand so that the limiting rod 509 inside the bottom frame can pass over the protruding upper end of the front protruding hinge shaft 404, ensuring that the support frame unit 5 can obtain a large lateral adjustment range.

[0082] Ultimately, the grass pressing disc 13 can avoid any new battery packs or other structures that may be installed under the vehicle body 11. This is crucial for the environmentally friendly "oil-to-electric" conversion of the sand barrier laying vehicle in the future.

[0083] Generally, the left and right positions of the three grass pressing discs 13 are adjusted to the same range before use, and the distance between each pair is kept equal.

[0084] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A three-station sand fence laying device, the structure comprising a vehicle body (11), wheels (12), and a grass roller (13), characterized in that: Also included are three grass compression assemblies, wherein a grass compression disc (13) is arranged at the front end of the vehicle body (11) between the two wheel paths; two grass compression assemblies are arranged at the rear end of the vehicle body (11) on both sides of the two wheel paths.

2. A three-station sand fence laying device according to claim 1, characterized in that: Also included are a transverse widening plate (1) arranged on the vehicle body (11) at the rear end of the vehicle body (11) in the direction of travel, and three sets of mounting plates (2) arranged at the front end of the vehicle body (11) and at both ends of the transverse widening plate (1).

3. A three-station sand fence laying device according to claim 1, characterized in that: The grass compression assembly includes a hinged frame unit (3) arranged on the vehicle body (11) and used for coarse adjustment of the sand layer penetration depth of the grass compression disc (13), an extension frame unit (4) arranged on the hinged frame unit (3) and used for fine adjustment of the sand layer penetration depth of the grass compression disc (13), a support frame unit (5) arranged on the extension frame unit (4) and used for mounting the grass compression disc (13), and a support rod (6) arranged on the support frame unit (5) and used for sleeving a grass screen roll (a).

4. A three-station sand fence laying device according to claim 3, characterized in that: The hinged frame unit (3) includes two screw plates (301) for connecting the vehicle body (11), rotatable plates (302) arranged at one end of the screw plates (301), a middle plate (303) arranged on the two rotatable plates (302) and used for supporting the extension frame unit (4), and a coarse adjustment extension rod (304) arranged on the screw plates (301) and rotatable plates (302).

5. A three-station sand fence laying device according to claim 4, characterized in that: The extension frame unit (4) includes two fine adjustment extension rods (401) arranged at both ends of the two rotatable plates (302), a connecting plate (402) arranged on the two fine adjustment extension rods (401) and used for mounting the support frame unit (5), and two vertical limiting blocks (403) arranged on the connecting plate (402) and located on both sides of the middle plate (303).

6. A three-station sand fence laying device according to claim 5, characterized in that: The support frame unit (5) includes a bottom frame (501) arranged on the connecting plate (402), a vertical frame (502) arranged on the bottom frame (501) and used for mounting the support rod (6), a front vertical plate (503) arranged on the bottom frame (501) and used for mounting the grass compression disc (13), and a rear vertical plate (504) arranged on the bottom frame (501) and connected to the grass compression disc (13) and used for transversely clamping the vertical limiting blocks (403).

7. A three-station sand fence laying device according to claim 6, characterized in that: The support frame unit (5) further includes two L-shaped widening plates (505) connected to the bottom frame (501) and the rear vertical plate (504) at both ends, respectively, and allowing transverse adjustment of the mounting position of the support frame unit (5).

8. A three-station sand fence laying device according to claim 7, characterized in that: The support frame body unit (5) further comprises a vertical slot (506) arranged on the rear end vertical plate (504), and a telescopic rod (507) arranged on the vertical slot (506) and used for transversely fixing the support frame body unit (5) by pulling out the telescopic rod (507) upward to transversely block the vertical limiting block (403).

9. A three-station sand fence laying device according to claim 8, characterized in that: The support frame body unit (5) further comprises a fixing slot (508) arranged on the lower surface of the bottom frame (501) and used for inserting the telescopic rod (507).

10. A method of using a three-station sand fence laying device as claimed in any one of claims 7-9, characterized in that: The lateral relative position of the grass crushing disc (13) relative to the two wheel paths is adjusted by transversely rotating the fine adjustment telescopic rod (401) and / or transversely sliding the support frame body unit (5).

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