Soil-loosening and filling integrated driven trailer for use in saline-alkali soil hardened soil break-up and improvement

Abstract

A soil-loosening and filling integrated driven trailer for use in saline-alkali soil hardened soil break-up and improvement. The driven trailer comprises a trailer frame (10); travel wheels (12) are provided on two sides of the trailer frame (10), and lifting wheel mechanisms (20) are provided at the front end and the rear end of the trailer frame (10); each lifting wheel mechanism (20) comprises an obliquely provided inclined support rod (211), wherein the upper end of the inclined support rod (211) is hinged to the bottom of the trailer frame (10), the lower end of the inclined support rod (211) is fixed to a lifting wheel (213), and a push-pull rod (2141) drives the inclined support rod (211) to rotate so as to adjust the distance between the lifting wheel (213) and the trailer frame (10). A plowing system (30), a spiral plow group system (40), a straw discharging system (50), and a compaction system (90) are sequentially provided, from the front to the rear along the travel direction of the driven trailer, at the portion of the bottom of the trailer frame (10) between the lifting wheel mechanisms (20).

Description

Integrated driven trailer for soil loosening and landfill improvement in saline-alkali soil conditions

[0001] This application claims priority to Chinese Patent Application No. 2025108845983, filed on June 30, 2025, entitled "An Integrated Driven Trailer for Soil Loosening and Landfilling for Saline-Alkali Plate Breaking Improvement", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of agricultural motor vehicle technology, and in particular to a driven trailer for loosening soil and filling landfill for saline-alkali soil improvement. Background Technology

[0003] In the agricultural improvement of coastal saline-alkali land, soil turning is a crucial step in breaking up soil compaction and improving soil permeability, and has become a key means of improving the geochemical properties of saline-alkali land. Common methods mainly include manual turning and deep loosening by machinery. Among them, manual or mechanical turning can break up soil compaction to a certain extent, improve soil physical structure, and enhance permeability. However, the large-scale promotion of soil turning has obvious limitations: low efficiency, high cost, large investment of labor or machinery, and the improvement effect is difficult to sustain. After a period of time, soil re-compaction and even salt rebound often occur. In addition, the disturbance of soil layer structure during turning may exacerbate the upward migration of salts, further aggravating salt damage.

[0004] Another common technical approach is to use trenching to enhance soil permeability and salt removal. However, most deep tillage or trenching equipment currently operates at a depth of around 30cm, making it difficult to reach deeper salt-rich areas. The deeper soil structure remains unresolved and cannot be effectively broken up and reconstructed. Furthermore, the inability to simultaneously stabilize the trench structure and backfill compaction easily leads to trench wall collapse and surface soil erosion, further deteriorating the soil structure and severely impacting the flatness of subsequent farmland and the feasibility of crop planting.

[0005] Furthermore, most existing deep-plowing equipment has a low center of gravity and a simple walking mechanism design. When not in operation, the equipment typically lacks independent drive or support conversion capabilities, making it difficult to move flexibly between farmlands or different plots, severely restricting its mobility and the feasibility of continuous operation across multiple plots. This limited mobility not only increases transportation costs but also reduces the overall efficiency of agricultural machinery operation systems.

[0006] Therefore, existing soil turning equipment has many shortcomings in terms of structure, function, trench treatment and mobility, and cannot achieve long-term soil improvement. It damages the soil structure and cannot meet the actual needs of deep soil improvement in saline-alkali land, especially coastal muddy saline-alkali land. Summary of the Invention

[0007] To address some shortcomings in the existing technology, this application provides a driven trailer for loosening soil and filling landfill for saline-alkali soil breaking and improvement (hereinafter referred to as driven trailer).

[0008] This application provides a driven trailer for loosening soil and filling landfill for saline-alkali soil compaction improvement, comprising:

[0009] A chassis, with a control room located on top of the chassis and wheels on both sides of the chassis;

[0010] Lifting wheel mechanisms are respectively located at the front and rear ends of the vehicle frame; the two lifting wheel mechanisms are arranged in a V-shape; each lifting wheel mechanism includes:

[0011] The support bar is inclined and its upper end is hinged to the bottom of the frame. The hinge point between the two is the first hinge point.

[0012] A lifting wheel is disposed at the lower end of the support rod; as the support rod rotates about the first hinge point, the distance between the lifting wheel and the ground changes accordingly; and

[0013] A push-pull assembly includes a push-pull rod, the first end of which is connected to the support diagonal rod, and the second end of which is slidably connected to the bottom of the frame;

[0014] At the bottom of the frame between the two lifting wheel mechanisms, in the direction of travel of the driven trailer, a plowing system, a spiral plow system, a straw feeding system and a compaction system are arranged sequentially from front to back;

[0015] When the driven trailer is not in operation, the push-pull rod pushes the support diagonal rod to rotate, increasing the distance between the lifting wheel and the frame until the lifting wheel contacts the ground. The plowing system, the auger plow system, and the straw feeding system are all located above the ground, and the traveling wheels are suspended in the air. The frame is pulled, and the lifting wheel drives the driven trailer to transport it to the work area.

[0016] When the driven trailer is in operation, the push-pull rod pulls the support diagonal rod to rotate in the opposite direction, the distance between the lifting wheel and the frame shortens until the lifting wheel is suspended in the air, the traveling wheel contacts the ground, and the plowing system, the spiral plow system and the straw feeding system all reach the designated working depth.

[0017] For coastal muddy saline-alkali land, the driven trailer enables continuous automatic ditching and straw unloading operations. At the same time, the lifting wheel mechanism allows the driven trailer to have independent support and walking capabilities when not in operation. It can move flexibly between farmland or different plots, has high mobility, realizes continuous operation in multiple plots, reduces transportation costs, and improves the overall efficiency of the agricultural machinery operation system.

[0018] In one embodiment, the push-pull assembly further includes a telescopic assembly, which comprises:

[0019] A hydraulic cylinder, wherein the cylinder barrel is horizontally fixed to the bottom surface of the vehicle frame;

[0020] The slider has a groove on the bottom surface of the frame, and the slider is disposed in the groove; the slider is fixedly connected to the piston rod of the hydraulic cylinder, and the slider is also hinged to the second end of the push-pull rod;

[0021] The second end of the push-pull rod is hinged to the slider, and the first end is hinged to the support rod.

[0022] The piston rod extends, pushing the slider to move from the outside to the inside of the frame along the slide groove. The angle between the push-pull rod and the frame increases. The push-pull rod pushes the support rod to rotate around the first hinge point. The lifting wheel moves towards the ground.

[0023] The piston rod retracts, pulling the slider along the slide groove from the inside to the outside of the frame. The angle between the push-pull rod and the frame decreases. The push-pull rod pulls the support rod to rotate in the opposite direction around the first hinge point. The lifting wheel moves in the direction away from the ground.

[0024] In one embodiment, the wheels are mounted on the left and right sides of the frame via fixed brackets; each fixed bracket includes a vertically mounted support rod and a connecting rod fixed to the bottom end of the support rod and extending horizontally outward from the frame; the wheels are rotatably connected to the connecting rod; the top end of the support rod is fixed to the bottom surface of the frame.

[0025] When the driven trailer is in operation, the travel wheels are used to support the weight of the driven trailer and drive the driven trailer to move; when not in operation, the travel wheels are suspended in the air.

[0026] In one embodiment, the plowing depth of the plowing system is greater than or equal to the breaking depth of the auger plow system. When the driven trailer is not in operation, during the movement of the lifting wheel, to prevent other components used for loosening and filling the soil from contacting the ground and causing inconvenience, the supporting diagonal rod and the fixed bracket satisfy the following formula: L 支撑斜杆 +R 托举轮 >L 支撑杆 +R 行走轮

[0027] Among them, L 支撑斜杆 R is the length of the supporting diagonal bar. 托举轮 L is the radius of the lifting wheel. 支撑杆 R is the length of the support rod. 行走轮 The radius of the wheel.

[0028] In one embodiment, the tillage system includes a horizontally arranged bottom shovel and vertically evenly arranged plow plates on the bottom shovel, the vertical plow plates being parallel to the driving direction of the driven trailer; the bottom shovel is configured to scoop up soil, and the vertical plow plates are configured to cut the scooped soil into strips.

[0029] In one embodiment, a soil-crushing mechanism is provided behind the plowing system; the soil-crushing mechanism includes multiple roller cutter assemblies arranged side by side, each roller cutter assembly being located between two adjacent vertical plow plates; each roller cutter assembly includes a roller shaft and roller cutters evenly distributed on the outer circumference of the roller shaft; the rotation of the roller shaft drives the roller cutters to rotate, thereby crushing the soil surface layer cut by the plowing system.

[0030] In one embodiment, a wetting system is provided above the plowing system. The wetting system includes a water tank located on top of the vertical plow plate. The water tank is used to store water. The water tank is connected to a water pump. The water pump is connected to multiple water pipes, each of which is located on the edge of each vertical plow plate. Water outlets are evenly distributed on the water pipes. The water pump flows water from the water tank into each water pipe and into the soil through the water outlets to wet the soil cut by the vertical plow plate.

[0031] In one embodiment, the auger plow assembly system includes multiple auger plow units arranged side by side, the auger plow units being positioned opposite the rotary cutter assembly to receive soil from the rotary cutter assembly, and the auger plow units being inclined from top to bottom toward the forward direction of the driven trailer; the bottom end of the auger plow unit is approximately flush with the bottom end of the bottom shovel plate;

[0032] The spiral plow unit includes a rotating shaft and spiral blades arranged along the length of the rotating shaft. The width of the spiral blades gradually increases from bottom to top. While horizontally cutting and breaking the soil, the broken soil is spirally transported upward, forming strip-shaped trenches on the ground.

[0033] In one embodiment, each of the auger plow units is connected to a rearwardly extending, horizontally positioned soil conveying plate at its top, and the auger plow unit transports broken soil upward onto the soil conveying plate, thereby forming the trench on the ground.

[0034] An inclined isolation baffle is provided below the soil conveying plate. The first end of the isolation baffle is fixed to the top of the auger unit, and the second end extends backward and downward at an incline. Soil on the soil conveying plate falls onto the isolation baffle and is transported backward.

[0035] In one embodiment, the straw feeding system includes a straw bin located above the vehicle frame for storing straw, and a plurality of feeding pipes connected to the straw bin and located below the vehicle frame. The feeding pipes are located behind the auger plow unit, and the straw enters the feeding pipes from the straw bin.

[0036] Below the feeding pipe is a discharge cylinder, which is a cuboid structure with an open bottom. After the straw in the feeding pipe enters the discharge cylinder, it is evenly dispersed and falls out from the opening.

[0037] The bottom end of the discharge cylinder is hinged with a straw guide plate, which is located on the bottom surface of the trench. The width of the straw guide plate is approximately equal to the width of the trench. Straw falling from the discharge cylinder falls into and is spread flat on the straw guide plate. During the driving of the driven trailer, the straw guide plate spreads and fills the trench with straw.

[0038] The isolation baffle guides the broken soil behind the straw guide plate, backfilling it on top of the straw.

[0039] Compared with the prior art, the beneficial effects of this application are as follows:

[0040] The driven trailer provided in at least one embodiment of this application enables continuous automatic ditching and straw feeding operations in coastal muddy saline-alkali land. At the same time, the lifting wheel mechanism allows the driven trailer to have independent support and walking capabilities when not in operation, enabling it to move flexibly between farmland or different plots. It has strong mobility, realizes continuous operation in multiple plots, reduces transportation costs, and improves the overall efficiency of the agricultural machinery operation system.

[0041] The driven trailer provided in at least one embodiment of this application has a plowing system that can perform strip cutting on saline-alkali land, and a spiral plowing system that can further perform lateral soil breaking and cutting in space, and has its own spiral soil transport function. The design of being wider at the top and narrower at the bottom fully takes into account the changes in soil pressure with depth, further reducing the difficulty of shoveling soil.

[0042] The driven trailer provided in at least one embodiment of this application has a auger plow system that transports soil to a soil conveying plate to form a deep trench, a straw feeding system for straw burial, and an isolation baffle to achieve soil backfilling. This enables deep, continuous, automatic trenching, straw feeding, and continuous backfilling processes, realizing a strip soil treatment process for saline-alkali land. After burying the straw and backfilling with the original soil, the salt leaching efficiency of the saline-alkali land soil is improved, which is conducive to the natural improvement of the regional soil environment. Attached Figure Description

[0043] Figure 1 is a right-side structural schematic diagram of a driven trailer according to one embodiment;

[0044] Figure 2 is an enlarged view of part A in Figure 1;

[0045] Figure 3 is an enlarged view of part B in Figure 1;

[0046] Figure 4 is a rear view of the frame, wheels and compaction system of the driven trailer;

[0047] Figure 5 is a schematic diagram of the vertical plow blade and wetting system of the driven trailer;

[0048] Figure 6 is a partial top view of the tilling and crushing systems of the driven trailer;

[0049] Figure 7 is a top view of part of the auger plow unit of the driven trailer;

[0050] In the diagram, 10 is the chassis, 11 is the control room, 12 is the traveling wheel, 13 is the fixed bracket, 131 is the support rod, 132 is the connecting rod, 133 is the reinforcing rib, 20 is the lifting wheel mechanism, 211 is the support diagonal rod, 212 is the first hinge point, 213 is the lifting wheel, 214 is the push-pull assembly, 2141 is the push-pull rod, 2142 is the hydraulic cylinder, 2142 is the piston rod, 21422 is the cylinder barrel, 2143 is the slider, 2144 is the slide groove, 215 is the second hinge point, 216 is the third hinge point, 30 is the plowing system, 31 is the bottom shovel plate, 32 is the vertical plow plate, 321 is the inclined waist, 322 is the lower bottom edge, 323 is the upper bottom edge, 33 is the arc-shaped slice, 331 is the arc 34. Plate frame, 40. Spiral plow assembly system, 41. Spiral plow unit, 411. Rotating shaft, 412. Spiral blade, 42. Soil conveying plate, 43. Isolation baffle, 44. Soil return guide plate, 45. Spacing, 50. Straw feeding system, 51. Straw box hopper, 52. Receiving funnel, 53. Feeding pipe, 54. Discharge cylinder, 541. Opening, 55. Straw guide plate, 60. Wetting system, 61. Water tank, 62. Water pipe, 63. Water pump, 64. Water outlet, 70. Soil crushing mechanism, 71. Roller cutter assembly, 711. Roller, 712. Roller cutter, 80. Straw, 90. Compaction system, 91. Compaction support rod, 92. Pressure roller, 93. Spring. Detailed Implementation

[0051] The technical solutions of this application are described in detail below with reference to specific embodiments. However, it should be understood that, without further description, the elements, structures and features in one embodiment can also be beneficially incorporated into other embodiments.

[0052] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0053] In the description of this application, it should be understood that the terms "upper", "lower", "outer", "inner", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in Figure 1, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] The driving direction (i.e., the traction direction) of the driven trailer includes the forward direction (arrow direction in Figure 1) and the reverse direction, which are consistent with the length direction, front end and rear end of the driven trailer; the width direction of the driven trailer is perpendicular to its driving direction and is consistent with the left and right sides of the driven trailer.

[0056] As shown in Figures 1-7, this embodiment provides a driven trailer (hereinafter referred to as a driven trailer) for soil loosening and landfilling improvement in saline-alkali soil, including:

[0057] A frame 10 has a control room 11 mounted on top of it. The control room 11 is configured to control the plowing system 30, the auger plow system 40, and the straw feeding system 50 of the driven trailer. Wheels 12 are mounted on both sides of the frame 10; as shown in Figure 4, the wheels 12 are mounted on the left and right sides of the frame 10 via fixed brackets 13. The fixed brackets 13 include a vertically mounted support rod 131 and a connecting rod 132 fixed to the bottom end of the support rod 131 and extending horizontally outwards from the frame 10; the top end of the support rod 131 is fixed to the bottom surface of the frame 10; the wheels 12 are rotatably connected to the connecting rod 132. To increase the support strength of the fixed brackets 13 and prevent the support rod 131 from deforming under pressure, reinforcing ribs 133 are provided between the support rod 131 and the connecting rod 132. The distance between the two side wheels 12 is greater than or equal to the width of the frame 10. The wheels 12 do not occupy the space under the frame 10, so as to facilitate the normal operation of the plowing system 30, the spiral plow system 40 and the straw feeding system 50.

[0058] To enable the driven trailer to move independently when not in operation, allowing it to move flexibly between farmlands or different plots without causing collision damage to the plowing system 30, the auger plow system 40, and the straw feeding system 50, lifting wheel mechanisms 20 are respectively installed at the front and rear ends of the frame 10, as shown in Figure 1. The two lifting wheel mechanisms 20 are arranged in a V-shape; that is, they are set outwards and inclined relative to each other.

[0059] Each lifting wheel mechanism 20 includes:

[0060] In the longitudinal direction of the driven trailer, a support rod 211 is inclined from top to bottom along the inner side of the frame 10 to the outer side; the upper end of the support rod 211 is hinged to the bottom of the frame 10, and the hinge point between the two is the first hinge point 212.

[0061] A lifting wheel 213 is installed at the lower end of the support rod 211; when the support rod 211 rotates around the first hinge point 212, the distance between the lifting wheel 213 and the ground changes accordingly.

[0062] The push-pull assembly 214 is configured to push the support rod 211 to rotate about the first hinge point 212.

[0063] In one specific embodiment, as shown in Figures 1 and 2, the push-pull assembly 214 includes a push-pull rod 2141. The first end of the push-pull rod 2141 is hinged to the upper part of the support rod 211 (i.e., the hinge point is located above the middle of the support rod 211). The forward and backward movement of the push-pull rod 2141 can drive the support rod 211 to rotate around the first hinge point 212. The push-pull assembly 214 also includes a telescopic assembly connected to the second end of the push-pull rod 2141 (which is opposite to the first end). In one embodiment, the telescopic assembly includes a hydraulic cylinder 2142 and a slider 2143 fixed to the end of the piston rod 21421 of the hydraulic cylinder 2142. The cylinder barrel 21422 of the hydraulic cylinder 2142 is horizontally fixed to the bottom surface of the frame 10. The extension and retraction direction of the piston rod 21421 is parallel to the forward direction of the driven trailer. The slider 2143 slides back and forth on the bottom surface of the frame 10 as the piston rod 21421 of the hydraulic cylinder 2142 extends and retracts.

[0064] To facilitate the movement of the slider 2143, a groove 2144 is formed on the bottom surface of the frame 10, extending along the travel direction of the driven trailer. The groove 2144 limits the slider 2143 in the left-right direction to prevent it from swaying, and guides it in the front-back direction. The piston rod 21421 of the hydraulic cylinder 2142 extends and retracts, causing the slider 2143 to move within the groove 2144. The upper end of the push-pull rod 2141 is hinged to the slider 2143 at the second hinge point 215, and the lower end is hinged to the support diagonal rod 211 at the third hinge point 216.

[0065] When the driven trailer is not in operation, the piston rod 21421 of the control hydraulic cylinder 2142 extends, pushing the slider 2143 to move from the outside to the inside along the slide groove 2144. Simultaneously, the upper end of the push-pull rod 2141 (taking the push-pull rod on the left side of Figure 1 as an example) moves synchronously with the slider 2143 and rotates clockwise around the second hinge point 215. At the same time, the lower end of the push-pull rod 2141 moves downwards and rotates clockwise around the third hinge point 216. The lower end of the push-pull rod 2141 pushes the support diagonal rod 2... 11 rotates counterclockwise around the first hinge point 212, the angle between the support diagonal rod 211 and the frame 10 increases, the lifting wheel 213 moves towards the ground until the lifting wheel 213 contacts the ground, the plowing system 30, the spiral plow system 40 and the straw feeding system 50 are all above the ground, and the traveling wheel 12 is suspended in the air. The tractor pulls the driven trailer in front of the frame 10, and the lifting wheel 213 drives the driven trailer to transport to the work area; in Figure 1, the arrow direction is the traction direction.

[0066] When in operation, the piston rod 21421 of the control hydraulic cylinder 2142 retracts, pulling the slider 2143 to move from the inside to the outside along the slide groove 2144. At the same time, the upper end of the push-pull rod 2141 moves outward synchronously with the slider 2143 and rotates counterclockwise around the second hinge point 215. At the same time, the lower end of the push-pull rod 2141 moves upward and rotates counterclockwise around the third hinge point 216. The lower end of the push-pull rod 2141 pulls the support inclined rod 211 to rotate clockwise around the first hinge point 212. The angle between the support inclined rod 211 and the frame 10 decreases, and the lifting wheel 213 moves towards the frame 10 until the lifting wheel 213 is suspended in the air and the traveling wheel 12 contacts the ground. At the same time, the plowing system 30, the spiral plow system 40, and the straw feeding system 50 all reach the designated working depth.

[0067] Furthermore, to ensure that when the driven trailer is not in operation, the lifting wheel 213 prevents the plowing system 30, the auger plow system 40, and the straw feeding system 50 from contacting the ground during movement, thus avoiding inconvenience or even damage to the equipment, the supporting diagonal rod 211 and the fixed bracket 13 meet the following conditions: L 支撑斜杆 +R 托举轮 >L 支撑杆 +R 行走轮

[0068] Among them, L 支撑斜杆 For the length of the supporting diagonal rod 211, R 托举轮 L is the radius of the lifting wheel 213. 支撑杆 R is the length of support rod 131. 行走轮 The radius of the traveling wheel 12.

[0069] To achieve continuous automatic ditching and straw unloading operations, a plowing system 30 is installed at the front end of the bottom of the frame 10. In this application, "front end" and "rear end" refer to the front and rear ends of the driven trailer in the forward direction during operation, i.e., the direction indicated by the arrow in Figure 1 is the front end. The plowing system 30 includes a horizontally arranged bottom shovel plate 31 and multiple vertically evenly distributed plow plates 32 (spaced apart along the width direction) on the bottom shovel plate 31. The vertical plow plates 32 are parallel to the driving direction of the driven trailer. The bottom shovel plate 31 can penetrate the soil to a certain depth and then scoop up the soil, while the vertical plow plates 32 can cut the scooped soil into strips. In one embodiment, the scooping depth of the bottom shovel plate 31 is 0.6m. The vertical plow plates 32 are right-angled trapezoidal plate structures. The inclined waist 321 of the vertical plow plate 32 is located at its front end and is used to cut the soil. The shorter lower bottom edge 322 is located at the bottom and fixed to the bottom shovel plate 31, while the longer upper bottom edge 323 is located on the upper side. To reduce the resistance of the vertical plow plate 32 in cutting the soil, an arc-shaped slice 33 extends outward from the junction of the inclined waist 321 and the bottom edge 322. The two sides of the arc-shaped slice 33 are welded and fixed between the inclined waist 321 and the bottom shovel plate 31, respectively. The concave arc-shaped edge 331 is used to cut the soil at the bottom, which can reduce resistance. The vertical plow plate 32 and the bottom shovel plate 31 are fixed by a vertically set frame 34. The frame 34 includes multiple vertical strips. The spacing between two adjacent vertical strips is the same as the spacing between two adjacent vertical plow plates 32, so that the strips of soil cut by the vertical plow plate 32 can pass smoothly through the frame 34 to the rear.

[0070] Due to the severe soil compaction in the coastal saline-alkali soil, the cutting resistance during plowing is high and the structure is unevenly fractured, affecting the subsequent crushing and landfill treatment effect. In order to reduce the resistance of the plowing system 30 in shoveling soil, a wetting system 60 is also set above the plowing system 30. As shown in Figure 5, the wetting system 60 includes a water tank 61 set on the top of the frame 34. The water tank 61 is used to store water. The water tank 61 is connected to a water pump 63. The water pump 63 is connected to multiple water pipes 62. Each water pipe 62 is embedded in the edge of each vertical plow plate 32. Water outlets 64 are evenly distributed on each water pipe 62. The circulating pressurized water pump 63 flows the water in the water tank 61 into each water pipe 62. The water in the water pipe 62 flows into the soil through the water outlets 64 to wet the soil cut by the vertical plow plate 32. The end of the water pipe 62 is equipped with a three-way connector and a pressure valve (not shown in the figure). Some of the water, mixed with soil, flows out naturally, and some flows back to the water tank 61 when the water pressure is high to save water.

[0071] After the plowing system 30 cuts the soil into strips, the surface soil is broken up by the soil crushing mechanism 70, which is located behind the plowing system 30, as shown in Figures 1 and 6. The soil crushing mechanism 70 includes multiple roller cutter assemblies 71 arranged side by side (along the width direction); each roller cutter assembly 71 is located between two adjacent vertical plow plates 32. The roller cutter assembly 71 includes a roller 711 and roller cutters 712 evenly distributed on the outer circumferential surface of the roller 711; in this embodiment, the roller cutter 712 is an arc-shaped blade, and its projected surface is arc-shaped, as shown in Figure 1. The first straight edge of one end is parallel to the axis of the roller 711 and fixed on the outer circumferential surface of the roller 711, and the second straight edge opposite to the first straight edge is the cutting edge. When the roller 711 rotates, it drives the roller cutter 712 to rotate. The rotation surface of the roller cutter 712 is parallel to the forward direction of the driven trailer, and the cutting edge of the roller cutter 712 breaks up the surface soil cut by the plowing system 30. The roller 711 drives the outer circumferential cutting blade 712 to rotate at high speed. After the plowing system 30 shovels up the soil and cuts it into strips, it mechanically shears the surface soil, achieving soil fragmentation and loosening of structure, thus improving the thoroughness of soil loosening treatment.

[0072] After the soil crushing mechanism 70 crushes the surface soil, a spiral plow assembly system 40 is installed behind the soil crushing mechanism 70 to further crush the cut soil. Referring to Figures 1 and 7, the spiral plow assembly system 40 includes multiple spiral plow units 41 arranged side by side (along the width direction). The spiral plow units 41 are arranged opposite to the rotary cutter assembly 71 to receive the soil from the soil crushing mechanism 70, and the spiral plow units 41 are inclined from top to bottom in the forward direction of the driven trailer. The bottom end of the spiral plow unit 41 is the same depth as the bottom shovel plate 31 (i.e., the bottom ends of the two are roughly flush). The spiral plow units 41 are driven by an electric motor or diesel engine to rotate continuously, thereby achieving rotary cutting of the soil.

[0073] Specifically, as shown in Figure 7, the spiral plow unit 41 includes a rotating shaft 411 and continuous spiral blades 412 arranged along the length of the rotating shaft 411. The width of the spiral blades 412 gradually increases from bottom to top, which can realize the rotational cutting and crushing of the soil while forming a spiral auger for the upward movement of the soil. The crushed soil is spirally transported upward along the spiral blades 412, crushing and lifting at the same time, so that the soil cut into strips by the two vertical plow plates 32 is transported out, thereby forming a strip-shaped deep trench (groove) on the ground.

[0074] To further improve compacted soil, straw is buried at the bottom of the trench. Therefore, a straw feeding system 50 is installed behind the auger plow assembly system 40. Referring to Figures 1 and 3, the straw feeding system 50 includes a straw bin 51 located above the frame 10 for storing straw 80, a receiving funnel 52 connected to the straw bin 51 and located below the frame 10, and multiple feeding pipes 53 connected to the receiving funnel 52. In one embodiment, the feeding pipes 53 are arranged one-to-one with the auger plow unit 41 and the rotary cutter assembly 71. After the straw 80 is pre-cut to a certain length, it is placed in the straw bin 51. The straw 80 falls into the receiving funnel 52 below, and the straw in the receiving funnel 52 falls in groups into the feeding pipes 53, where the feeding pipes 53 group and collect the straw 80.

[0075] As shown in Figure 3, each feeding pipe 53 is connected to a feeding cylinder 54 below it. The feeding cylinder 54 is a flat cuboid structure with an opening 541 at its lower end. The width of the feeding cylinder 54 is equal to the distance between two adjacent vertical plow plates 32, that is, equal to the width of the trench. After the straw 80 in the feeding pipe 53 enters the feeding cylinder 54, it is evenly dispersed and falls out from the opening 541.

[0076] To ensure the straw 80 is evenly spread at the bottom of the trench, a straw guide plate 55 is hinged to the bottom end of the discharge cylinder 54. The straw guide plate 55 conforms to the bottom direction of the trench, providing support and directional laying. The width of the straw guide plate 55 is adapted to the width of the trench (i.e., approximately equal to or slightly narrower). The straw 80 falling from the discharge cylinder 54 falls into and spreads evenly on the straw guide plate 55. During the movement of the driven trailer, the straw guide plate 55 evenly fills the trench with the straw 80. In one embodiment, the thickness of the straw 80 is at least 0.2m, for example, 0.2m, 0.25m, 0.3m, 0.4m, etc.

[0077] To ensure that the straw is evenly covered by the crushed soil after being laid at the bottom of the trench, and to prevent the crushed soil from the auger plow system 40 from falling into the trench prematurely, especially in the area in front of the feed pipe 53, an effective isolation structure is needed to guide the soil to the rear area below the straw. As shown in Figure 3, each auger plow unit 41 is connected to a horizontally positioned, rearward-extending soil conveying plate 42 at its top. The auger plow unit 41 transports the crushed soil upwards onto the soil conveying plate 42. Gap 45s are evenly distributed on adjacent soil conveying plates 42, through which the crushed soil falls. An isolation baffle 43 is inclinedly installed below the soil conveying plate 42. The first end of the isolation baffle 43 is fixed to the top of the auger plow unit 41, and the second end, opposite to the first end, extends backwards and downwards at an incline, then connects to a return soil guide plate 44. The return soil guide plate 44 and the feed pipe 53 are intersected along the width direction and extend to the rear of the straw guide plate 55. Soil on the conveying plate 42 falls into the isolation baffle 43, which delays the landing time and position of the broken soil, preventing it from falling into the trench in front of the feed pipe 53. The return guide plate 44 continues to guide the soil to the rear of the straw guide plate 55. After the straw 80 falls into the trench, the soil is backfilled on top of the straw 80 by tilting downwards through the isolation baffle 43 and the return guide plate 44. The isolation baffle 43 can prevent soil from falling before straw, realizing the operation sequence of filling straw first and then covering with soil, ensuring uniform and orderly backfilling. 0.6m of broken soil is backfilled on top of the straw. The conveying plate 42 can be any equipment capable of transporting soil, such as a belt conveyor.

[0078] After backfilling, the soil needs to be compacted to improve its stability and density, and reduce the risk of surface collapse or damage after the operation. Therefore, a compaction system 90 is installed behind the receiving funnel 52 to compact the backfilled soil. As shown in Figures 1 and 4, the compaction system 90 in this embodiment includes two compaction support rods 91 and a pressure roller 92. The front ends of the compaction support rods 91 are hinged to the rear side wall of the receiving funnel 52, and the rear ends of the two compaction support rods 91 are rotatably connected to both ends of the pressure roller 92. During the forward movement of the driven trailer, the compaction support rods 91 pull the pressure roller 92 to roll, compacting the backfilled soil.

[0079] To improve the compaction capacity of the pressure roller 92, a spring 93 is connected between the compaction support rod 91 and the receiving funnel 52. The spring 93 is in a compressed state, applying pressure to the compaction support rod 91, thereby increasing the downward pressure of the pressure roller 92 and achieving a better compaction effect.

[0080] When the driven trailer is in use, firstly, the piston rod of the hydraulic cylinder 2142 is extended, pushing the slider 2143 to move from the outside to the inside along the slide groove. At the same time, the upper end of the push-pull rod 2141 moves synchronously with the slider 2143 and rotates clockwise around the second hinge point 215. At the same time, the lower end of the push-pull rod 2141 moves downward and rotates clockwise around the third hinge point 216. The lower end of the push-pull rod 2141 pushes the support inclined rod 211 to rotate counterclockwise around the first hinge point 212. The angle between the support inclined rod 211 and the frame 10 increases, and the lifting wheel 213 moves towards the ground until the lifting wheel 213 contacts the ground. The plowing system 30, the spiral plow system 40 and the straw feeding system 50 are all above the ground and will not plow or shovel soil. The traveling wheels 12 are suspended in the air. The tractor pulls in front of the frame 10, and the lifting wheel 213 drives the driven trailer to transport to the work area.

[0081] Then, after the transitional digging and shoveling of soil with manual assistance, the piston rod 21421 of the hydraulic cylinder 2142 is retracted, pulling the slider 2143 to move from the inside to the outside along the slide groove. At the same time, the upper end of the push-pull rod 2141 moves outward synchronously with the slider 2143 and rotates counterclockwise around the second hinge point 215. At the same time, the lower end of the push-pull rod 2141 moves upward and rotates counterclockwise around the third hinge point 216. The lower end of the push-pull rod 2141 pulls the support inclined rod 211 to rotate clockwise around the first hinge point 212. The angle between the support inclined rod 211 and the frame 10 decreases, and the lifting wheel 213 moves towards the frame 10 until the lifting wheel 213 is suspended in the air and the traveling wheel 12 contacts the ground. At the same time, the plowing system 30, the spiral plow system 40 and the straw feeding system 50 all reach the designated working depth.

[0082] The tractor pulls the driven trailer, the plowing system 30 vertically cuts the soil, the soil crushing mechanism 70 breaks up the surface soil, and the auger plow unit 41 of the auger plow system 40 deeply crushes the soil. At the same time, the soil is transported upward to the upper conveying plate 42, where it is temporarily stored and transported. The straw also passes through the falling soil to the rear of the auger plow system 40. Then, the soil falls through the gap between the discharge pipe 53 via the isolation baffle 43 and the return guide plate 44, thus achieving an effective connection between the three actions of shoveling soil, discharging straw, and returning soil in space and time. Finally, the compaction system 90 performs a certain compaction. Repeating the above process can complete the soil treatment process for the entire area.

[0083] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] The described embodiments are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application should fall within the protection scope defined by the claims of this application.

Claims

1. A driven trailer for loosening soil and filling landfill for saline-alkali soil compaction improvement, wherein, include: The vehicle frame has a control room located on top and wheels on both sides. Lifting wheel mechanisms are respectively located at the front and rear ends of the vehicle frame; each lifting wheel mechanism includes: The support bar is inclined and its upper end is hinged to the bottom of the frame. The hinge point between the two is the first hinge point. A lifting wheel is disposed at the lower end of the support rod; as the support rod rotates about the first hinge point, the distance between the lifting wheel and the ground changes accordingly; and A push-pull assembly includes a push-pull rod, the first end of which is connected to the support diagonal rod, and the second end of which is slidably connected to the bottom of the frame; At the bottom of the frame between the lifting wheel mechanisms, in the direction of travel of the driven trailer, a plowing system, a spiral plow system, a straw feeding system and a compaction system are arranged sequentially from front to back; When the driven trailer is not in operation, the push-pull rod pushes the support diagonal rod to rotate, increasing the distance between the lifting wheel and the frame until the lifting wheel contacts the ground. The plowing system, the auger plow system, and the straw feeding system are all above the ground, and the traveling wheels are suspended in the air. The frame is pulled, and the lifting wheel drives the driven trailer to the work area. When the driven trailer is in operation, the push-pull rod pulls the support diagonal rod to rotate in the opposite direction, the distance between the lifting wheel and the frame shortens until the lifting wheel is suspended in the air, the traveling wheel contacts the ground, and the plowing system, the auger plowing system and the straw feeding system all reach the designated working depth.

2. The driven trailer according to claim 1, wherein, The push-pull assembly also has a telescopic assembly, including: A hydraulic cylinder, wherein the cylinder barrel is horizontally fixed to the bottom surface of the vehicle frame; The slider has a groove on the bottom surface of the frame, and the slider is disposed in the groove; the slider is fixedly connected to the piston rod of the hydraulic cylinder, and the slider is also hinged to the second end of the push-pull rod; The first end of the push-pull rod is hinged to the supporting diagonal rod; The piston rod extends, pushing the slider to move from the outside to the inside of the frame along the slide groove. The angle between the push-pull rod and the frame increases. The push-pull rod pushes the support rod to rotate around the first hinge point. The lifting wheel moves towards the ground. The piston rod retracts, pulling the slider along the slide groove from the inside to the outside of the frame. The angle between the push-pull rod and the frame decreases. The push-pull rod pulls the support rod to rotate in the opposite direction around the first hinge point. The lifting wheel moves in the direction away from the ground.

3. The driven trailer according to claim 1, wherein, The wheels are mounted on the left and right sides of the frame via fixed brackets; each fixed bracket includes a vertically mounted support rod and a connecting rod fixed to the bottom end of the support rod and extending horizontally outward from the frame; the wheels are rotatably connected to the connecting rod; the top end of the support rod is fixed to the bottom surface of the frame. When the driven trailer is in operation, the travel wheels are used to support the weight of the driven trailer and drive the driven trailer to move; when not in operation, the travel wheels are suspended in the air.

4. The driven trailer according to claim 3, wherein, The tilling depth of the tilling system is greater than or equal to the crushing depth of the auger plow system; when the driven trailer is not in operation, during the movement of the lifting wheel, to prevent the tilling system, auger plow system, and straw feeding system at the bottom of the frame from contacting the ground, the following formula must be satisfied: L 支撑斜杆 +R 托举轮 >L 支撑杆 +R 行走轮 Among them, L 支撑斜杆 R is the length of the supporting diagonal bar. 托举轮 L is the radius of the lifting wheel. 支撑杆 R is the length of the support rod. 行走轮 The radius of the wheel.

5. The driven trailer according to claim 1, wherein, The tillage system includes a horizontally arranged bottom shovel and vertically evenly arranged plow plates on the bottom shovel, the vertical plow plates being parallel to the driving direction of the driven trailer; the bottom shovel is configured to scoop up soil, and the vertical plow plates are configured to cut the scooped soil into strips.

6. The driven trailer according to claim 5, wherein, A soil-crushing mechanism is provided at the rear of the plowing system; the soil-crushing mechanism includes multiple roller cutter assemblies arranged side by side, each roller cutter assembly being located between two adjacent vertical plow plates; each roller cutter assembly includes a roller shaft and roller cutters evenly distributed on the outer circumference of the roller shaft; the roller shaft rotates, driving the roller cutters to rotate, thereby crushing the soil cut by the plowing system.

7. The driven trailer according to claim 5, wherein, A wetting system is provided above the plowing system. The wetting system includes a water tank located on top of the vertical plow plate. The water tank is used to store water. The water tank is connected to a water pump. The water pump is connected to multiple water pipes, each of which is located on the edge of each vertical plow plate. Water outlets are evenly distributed on the water pipes. The water pump flows water from the water tank into each water pipe and into the soil through the water outlets to wet the soil cut by the vertical plow plate.

8. The driven trailer according to claim 6, wherein, The auger plow assembly system includes multiple auger plow units arranged side by side. The auger plow units are positioned opposite the rotary cutter assembly to receive soil from the rotary cutter assembly. The auger plow units are inclined from top to bottom in the forward direction of the driven trailer, and the bottom end of the auger plow unit is approximately flush with the bottom end of the bottom shovel plate. The spiral plow unit includes a rotating shaft and spiral blades arranged along the length of the rotating shaft. The width of the spiral blades gradually increases from bottom to top. While horizontally cutting and breaking the soil, the broken soil is spirally transported upward, so that the ground forms strip-shaped trenches.

9. The driven trailer according to claim 8, wherein, Each of the spiral plow units is connected to a rearwardly extending, horizontally positioned soil conveying plate at the top, and the spiral plow unit transports the broken soil upwards onto the soil conveying plate. An inclined isolation baffle is provided below the soil conveying plate. The first end of the isolation baffle is fixed to the top of the auger unit, and the second end extends backward and downward at an incline. Soil on the soil conveying plate falls onto the isolation baffle and is transported backward.

10. The driven trailer according to claim 9, wherein, The straw feeding system includes a straw bin located above the vehicle frame for storing straw, and multiple feeding pipes connected to the straw bin and located below the vehicle frame. The feeding pipes are located behind the auger plow unit, and the straw enters the feeding pipes from the straw bin. Below the feeding pipe is a discharge cylinder, which is a cuboid structure with an open bottom. After the straw in the feeding pipe enters the discharge cylinder, it is evenly dispersed and falls out from the opening. The bottom end of the discharge cylinder is hinged with a straw guide plate, which is located on the bottom surface of the trench. The width of the straw guide plate is approximately equal to the width of the trench. Straw falling from the discharge cylinder falls into and is spread flat on the straw guide plate. During the driving of the driven trailer, the straw guide plate spreads and fills the trench with straw. The isolation baffle guides the broken soil behind the straw guide plate, backfilling it on top of the straw.

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