A soil remediation spraying device and a saline-alkali soil liquid spraying method

Abstract

This invention relates to the field of soil remediation technology, specifically a spraying device and method for spraying pesticide solution on saline-alkali land. The device includes a frame; a pesticide tank; a lifting plate mounted on the frame, with a rotating shaft rotatably mounted on the lifting plate and blades fixedly mounted on the shaft; multiple suction sleeves fixedly mounted on the frame; the suction sleeves are connected to the pesticide tank via guide valves, and the suction sleeves are connected to a spray pipe via one-way valves, with nozzles rotatably mounted on the spray pipe; a plunger is slidably fitted inside the suction sleeve; the frame includes a pressing structure and a spraying structure. The pressing structure can move the multiple blades closer to or away from the soil; the spraying structure can move the plunger away from the frame to spray the pesticide solution. The pressing structure causes the rotating blades to descend and contact the soil, breaking it up and making it loose and porous, allowing the pesticide solution to penetrate more smoothly to a predetermined depth, avoiding waste and pollution caused by runoff on the surface of compacted soil.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a spraying device for soil remediation and a method for spraying pesticide solutions on saline-alkali land. Background Technology

[0002] Soil is a vital resource for human survival; however, with rapid industrialization and agricultural modernization, soil pollution and degradation have become increasingly serious problems. Among these, the remediation of saline-alkali soils and heavy metal-contaminated soils has become a global environmental challenge. Traditional soil remediation methods mainly employ techniques such as chemical leaching, bioremediation, and physical tillage; among these, chemical leaching often involves spraying chemicals onto saline-alkali land using spraying devices.

[0003] Common spraying devices include a vehicle frame with a pesticide tank fixedly mounted on it, as well as a spraying structure. Typically, as the vehicle frame moves, the pesticide in the tank is sprayed onto the saline-alkali land through the spraying structure. The pesticide then seeps into the soil and, through the reaction between the pesticide and the saline-alkali components in the soil, replaces the saline-alkali components in the soil.

[0004] However, saline-alkali land often suffers from soil compaction and surface crusting, making it difficult for pesticide solutions to effectively penetrate to the target depth. Most of the pesticide solution is lost through runoff or evaporation on the soil surface, resulting in low actual permeability and significant waste, leading to high remediation costs. At the same time, excessively high concentrations of pesticide solution on the surface may also have adverse effects on the soil microbial community. Summary of the Invention

[0005] The purpose of this invention is to provide a spraying device for soil remediation and a method for spraying pesticide solution on saline-alkali land, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A spraying device for soil remediation includes a frame; a drive module and a liquid tank are fixedly mounted on the frame. It also includes multiple sets of pulleys rotatably mounted on the frame; the multiple sets of pulleys are connected by belts, and one of the pulley sets is connected to the output shaft of the drive module by a belt; The frame is equipped with a lifting plate, and multiple sets of rotating shafts that slide and engage with the pulley group are rotatably mounted on the lifting plate. Cutting tools are fixedly mounted on the rotating shafts. Multiple sets of suction sleeves are fixedly installed on the vehicle frame; the multiple sets of suction sleeves are connected to the medicine tank through a guide valve, and the suction sleeves are connected to a spray pipe through a one-way valve, and a nozzle is rotatably installed on the spray pipe; a plunger is slidably fitted inside the suction sleeve. The vehicle frame is equipped with a pressing structure and a spraying structure that work together. The pressing structure can drive the lifting plate to descend or rise, thereby moving multiple sets of blades closer to or away from the soil. At the end of the stroke of the blades moving away, the spraying structure can drive the plunger away from the vehicle frame to spray the pesticide.

[0007] The soil remediation spraying device described above comprises: a drive motor fixedly mounted on the frame; a lead screw fixedly mounted on the output end of the drive motor; a threaded sleeve threadedly connected to the lead screw; a loosening shaft and a spraying shaft rotatably mounted on the frame; a lifting sleeve and a suction sleeve respectively fitted onto the threaded sleeve; a drive groove group and a mating groove group respectively provided on the loosening shaft and the spraying shaft; and a lifting protrusion and a suction protrusion respectively fixedly mounted on the lifting sleeve and the suction sleeve, which slide and engage with the drive groove group and the mating groove group.

[0008] The soil remediation spraying device described above: the drive trough assembly includes an inclined trough and a vertical trough; wherein one end of the inclined trough is connected to one end of the vertical trough, and when the lifting protrusion slides in cooperation with the inclined trough, the lifting plate can descend or rise.

[0009] The soil remediation spraying device described above: the matching trough assembly includes a vertical trough and an extraction trough; wherein one end of the vertical trough is connected to one end of the extraction trough; when the extraction protrusion is engaged with the extraction trough, the plunger can slide in the suction sleeve.

[0010] The soil remediation spraying device described above includes a soil loosening sleeve fixedly installed on the lifting plate and sleeved with the soil loosening shaft; a soil loosening protrusion is fixedly installed on the soil loosening sleeve; and a soil loosening groove assembly is provided on the soil loosening shaft to slide and fit with the soil loosening protrusion.

[0011] The soil remediation spraying device described above includes an upper horizontal trough, a descending inclined trough, a lower horizontal trough, and an ascending inclined trough. The two ends of the descending inclined trough are connected to one end of the upper horizontal trough and one end of the lower horizontal trough, respectively, and the two ends of the ascending inclined trough are connected to the other ends of the upper horizontal trough and the lower horizontal trough, respectively. When the soil-loosening protrusion slides in conjunction with the descending and ascending inclined troughs, the lifting plate can descend or ascend.

[0012] The soil remediation spraying device described above includes a spraying plate mounted on the vehicle frame, with multiple sets of plungers fixedly mounted on the spraying plate; a spraying sleeve fitted onto the spraying plate and engaging with the spraying shaft; a spraying protrusion fixedly mounted on the spraying sleeve; and a spraying groove slidably engaging with the spraying protrusion on the spraying shaft.

[0013] The soil remediation spraying device described above comprises: a fixed sleeve fixedly installed on the spraying plate; a rotating rod rotatably mounted on the frame and sleeved with the fixed sleeve, the rotating rod having a set of reciprocating grooves, and a reciprocating protrusion fixedly installed on the fixed sleeve; a drive gear fixedly installed on the rotating rod; a sliding plate connected to the nozzle slidably fitted on the frame; a toothed block meshing with the drive gear fixedly installed on the sliding plate; multiple sets of toothed grooves formed on the sliding plate; and a reciprocating gear meshing with the toothed grooves fixedly installed on the nozzle.

[0014] The soil remediation spraying device described above: the reciprocating trough assembly includes a left inclined trough and a right inclined trough connected at their ends; wherein, when the reciprocating protrusion engages with the left inclined trough or the right inclined trough, the drive gear can reciprocate to rotate, thereby driving the nozzle to oscillate back and forth.

[0015] A method for spraying chemicals to remediate saline-alkali land using the soil remediation spraying device described above includes the following steps: Step 1: Move the frame and place the device on the saline-alkali land to be repaired; start the device and drive the drive module to rotate the cutter. Step 2: The cutting tool is lowered or raised by the downward pressure structure, and during the descent, the rotating cutting tool breaks up the saline-alkali soil. Step 3: After the cutter rises and resets, the spraying structure sprays the medicine onto the soil that has been loosened; then the pressing structure drives the cutter to descend or rise again, so that the rotating cutter mixes the soil and medicine. Step 4: Move the vehicle frame and move the device to another saline-alkali land to be repaired; then repeat steps 2 and 3.

[0016] Compared with existing technologies, the advantages of this invention are: It achieves rigid coupling of multiple actions (loosening, spraying, filling, and mixing) through mechanical linkage; the timing and stroke of the actions are determined by the physical structure, resulting in high precision in action coordination. Specifically, the spraying structure is immediately triggered the instant the blade reaches the end of its stroke, ensuring the pesticide is sprayed in the loosest possible soil condition. After spraying, the blade immediately descends for mixing, with seamless action transitions, effectively improving work efficiency. Furthermore, the device has relatively strong anti-interference capabilities, protecting it from dust, moisture, and vibration in field operations. The downward-pressing structure drives the rotating blade to descend and contact the soil, breaking it down and making it loose and porous. This allows the pesticide to penetrate more smoothly to the predetermined depth, avoiding waste and pollution caused by runoff on the surface of compacted soil. It also allows the soil to mix with... Thorough mixing of the pesticide solution significantly accelerates the contact and reaction rate between the solution and pollutants in the soil (such as saline ions), resulting in a more complete and uniform remediation reaction, fundamentally improving the thoroughness and speed of remediation. Furthermore, the spraying and filling of the pesticide solution are achieved by changing the position of the plunger within the suction sleeve. Because the plunger's sliding stroke is fixed, the amount of pesticide sprayed each time is relatively constant, facilitating the estimation and control of the amount of pesticide used per unit area, enabling scientific application and avoiding waste or insufficient dosage. During the spraying process, the reciprocating motion of the nozzle expands the sprayed area, thereby improving the mixing effect of subsequent mixing actions. This effectively enhances the uniformity of the pesticide distribution after mixing with the soil, preventing concentration differences that could lead to inconsistent soil remediation results, further improving the thoroughness and speed of remediation. Attached Figure Description

[0017] Figure 1 A schematic diagram of a spraying device for soil remediation.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure at point A in the middle.

[0019] Figure 3 A schematic diagram of the rotating shaft in a spraying device for soil remediation.

[0020] Figure 4 This is a schematic diagram of the blades in a spraying device for soil remediation.

[0021] Figure 5 This is a schematic diagram of the lifting plate in a spraying device for soil remediation.

[0022] Figure 6 for Figure 5 A schematic diagram of the structure at point B.

[0023] Figure 7 A schematic diagram of the spray plate in a soil remediation spraying device.

[0024] Figure 8 for Figure 7 A schematic diagram of the structure at point C.

[0025] Figure 9 A schematic diagram of the plunger in a spraying device for soil remediation.

[0026] Figure 10 for Figure 9 A schematic diagram of the structure at point D.

[0027] Figure 11 This is a schematic diagram of the rotating rod in a spraying device for soil remediation.

[0028] In the picture: 1. Frame; 2. Driver module; 3. Pulley assembly; 4. Lifting plate; 401. Soil loosening sleeve; 402. Soil loosening protrusion; 5. Shaft; 6. Knives; 7. Spray plate; 701. Spray sleeve; 702. Spray protrusion; 8. Plunger; 9. Suction sleeve; 10. Spray pipe; 11. Nozzle; 1101. Reciprocating gear; 12. Drive motor; 13. Lead screw column; 14. Threaded sleeve; 15. Lifting sleeve; 1501. Lifting protrusion; 16. Drain sleeve; 1601. Drain protrusion; 17. Soil loosening shaft; 1701. Inclined trough; 1702. Vertical trough; 1703. Upper horizontal trough; 1704. Descending inclined trough; 1705. Lower horizontal trough; 1706. Ascending inclined trough; 18. Spraying shaft; 1801. Vertical chute; 1802. Exhaust chute; 1803. Spraying chute 19. Fixed sleeve; 1901. Reciprocating protrusion; 20. Rotating rod; 2001. Left inclined groove; 2002. Right inclined groove; 2003. Drive gear; 21. Skateboard; 2101. Tooth block; 2102. Tooth groove; 22. Medicine liquid container. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0031] Please see Figures 1-11 As an embodiment of the present invention, the soil remediation spraying device includes a frame 1; a drive module 2 and a liquid tank 22 are fixedly installed on the frame 1. It also includes multiple sets of pulleys 3 rotatably mounted on the frame 1; the multiple sets of pulleys 3 are connected by belts, and one of the pulleys 3 is connected to the output shaft of the drive module 2 by a belt; The frame 1 is provided with a lifting plate 4, and multiple sets of rotating shafts 5 that slide and engage with the pulley group 3 are rotatably mounted on the lifting plate 4. A cutter 6 is fixedly mounted on the rotating shaft 5. Multiple sets of suction sleeves 9 are fixedly installed on the frame 1; the multiple sets of suction sleeves 9 are connected to the medicine tank 22 through a guide valve, and the suction sleeves 9 are connected to a spray pipe 10 through a one-way valve, and a nozzle 11 is rotatably installed on the spray pipe 10; a plunger 8 is slidably fitted inside the suction sleeve 9. The frame 1 is equipped with a pressing structure and a spraying structure that cooperate with each other. The pressing structure can drive the lifting plate 4 to descend or rise, so as to drive the multiple sets of blades 6 to approach or move away from the soil. At the end of the stroke of the blades 6 moving away, the spraying structure can drive the plunger 8 away from the frame 1 to spray the liquid medicine.

[0032] In this embodiment, the medicine tank 22 is filled with repair medicine; as the plunger 8 approaches the frame 1 (the plunger 8 slides outward in the suction sleeve 9), the medicine in the medicine tank 22 can be drawn into the suction sleeve 9 through the one-way valve; while as the plunger 8 moves away from the frame 1 (the plunger 8 slides inward in the suction sleeve 9), the medicine can be discharged into the spray pipe 10 through the one-way valve and discharged from the nozzle 11.

[0033] After the device is moved to the saline-alkali land to be repaired by the mobile frame 1, the device is started. The drive module 2 will drive multiple sets of pulleys 3 to rotate synchronously through the belt, thereby driving the rotating shaft 5 to rotate, which in turn drives the cutter 6 to rotate.

[0034] The downward pressing structure then causes the lifting plate 4 to descend closer to the ground or rise further away from the ground, thereby causing multiple sets of blades 6 to rotate closer to or further away from the ground. During the approaching process, the rotating blades 6 break up the soil to a certain depth, making the soil loose and porous, so that the liquid can penetrate to the predetermined depth more smoothly, avoiding waste and pollution caused by runoff on the surface of compacted soil. At the end of the stroke when the blades 6 rise away from the soil, the spraying structure causes the plunger 8 to slide inward in the suction sleeve 9, thereby spraying the liquid onto the loose soil. Since the sliding stroke of the plunger 8 is fixed, the amount of liquid sprayed each time is relatively fixed, which is conducive to estimating and controlling the amount of liquid used per unit area of ​​land, realizing scientific application of the liquid, and avoiding waste of liquid or insufficient dosage.

[0035] Afterwards, the plunger 8 will slide outwards in the suction sleeve 9 to re-inject the liquid into the suction sleeve 9 for use in the next position; then, the pressing structure will drive the cutter 6 to descend or rise again, so that the soil and liquid are fully mixed by the rotating cutter 6, which can significantly accelerate the contact and reaction rate between the liquid and pollutants (such as salt ions) in the soil, making the remediation reaction more complete and uniform, and fundamentally improving the thoroughness and speed of remediation.

[0036] As a further embodiment of the present invention, a drive motor 12 is fixedly mounted on the frame 1, and a lead screw 13 is fixedly mounted on the output end of the drive motor 12. A threaded sleeve 14 is threadedly connected to the lead screw 13. A soil loosening shaft 17 and a spraying shaft 18 are rotatably mounted on the frame 1. A lifting sleeve 15 and a suction sleeve 16, which are respectively sleeved with the soil loosening shaft 17 and the spraying shaft 18, are fixedly mounted on the threaded sleeve 14. A drive groove group and a mating groove group are respectively opened on the soil loosening shaft 17 and the spraying shaft 18. A lifting protrusion 1501 and a suction protrusion 1601, which are slidably engaged with the drive groove group and the mating groove group, are respectively fixedly mounted on the lifting sleeve 15 and the suction sleeve 16.

[0037] In this embodiment, after the device is moved to a suitable position, the drive motor 12 is started, thereby driving the lead screw 13 to rotate, so as to drive the threaded sleeve 14 to move along the axis of the lead screw 13 (closer to or away from the ground) through threaded engagement, thereby driving the lifting sleeve 15 and the extraction sleeve 16 to move synchronously.

[0038] As the soil approaches the ground, the lifting sleeve 15 and the extraction sleeve 16 move on the loosening shaft 17 and the spraying shaft 18, respectively. During this process, the sliding engagement of the lifting protrusion 1501 with the drive groove assembly and the extraction protrusion 1601 with the matching groove assembly drives the loosening shaft 17 and the spraying shaft 18 to rotate alternately (the loosening shaft 17 rotates first), thereby causing the pressing structure and the spraying structure to move alternately to perform the loosening and spraying actions sequentially. By using the rotating blade 6 to break up the soil, the soil loosening degree can be improved, thereby improving the seepage effect of the pesticide solution.

[0039] As the soil moves away from the ground, the lifting sleeve 15 and the extraction sleeve 16 move on the loosening shaft 17 and the spraying shaft 18, respectively. During this process, the sliding engagement of the lifting protrusion 1501 with the drive groove assembly and the extraction protrusion 1601 with the matching groove assembly drives the loosening shaft 17 and the spraying shaft 18 to rotate alternately (the spraying shaft 18 rotates first), thereby causing the spraying structure and the pressing structure to move alternately to perform the filling and mixing of the chemical solution. By rotating the blade 6, the chemical solution is fully mixed with the soil, which effectively improves the thoroughness and speed of the remediation.

[0040] Multiple actions (loosening soil, spraying, filling, and mixing) are rigidly coupled through mechanical linkage. The timing and stroke of the actions are determined by the physical structure, resulting in high precision in action coordination. The spraying structure is immediately triggered the moment the cutter 6 rises to the end of its stroke, ensuring that the pesticide is sprayed in the loosest state of the soil. After spraying, the cutter 6 immediately descends to mix the pesticide. The actions are seamlessly connected, which can effectively improve work efficiency. The device also has relatively strong anti-interference capabilities and can be protected from dust, moisture, and vibration in field operation environments.

[0041] As a further embodiment of the present invention, the drive groove assembly includes an inclined groove 1701 and a vertical groove 1702; wherein one end of the inclined groove 1701 is connected to one end of the vertical groove 1702, and when the lifting protrusion 1501 slides in cooperation with the inclined groove 1701, the lifting plate 4 can descend or rise.

[0042] In this embodiment, as the threaded sleeve 14 approaches the ground, the lifting protrusion 1501 first slides in the inclined groove 1701 towards the vertical groove 1702. Through the squeezing action of the lifting protrusion 1501 against the wall of the inclined groove 1701, it drives the loosening shaft 17 to rotate forward, thereby driving the downward pressing structure to break the soil, and then resetting after breaking. Afterwards, the lifting protrusion 1501 slides in the vertical groove 1702. During this process, the loosening shaft 17 does not rotate, and the cutter 6 remains separated from the ground.

[0043] As the threaded sleeve 14 moves away from the ground, the lifting protrusion 1501 first slides in the vertical groove 1702, at which point the cutter 6 remains separated from the ground. Then, the lifting protrusion 1501 slides away from the vertical groove 1702 in the inclined groove 1701. Through the squeezing action of the lifting protrusion 1501 against the wall of the inclined groove 1701, the loosening shaft 17 rotates in the opposite direction, thereby driving the downward pressing structure to perform the mixing action, and then resets after mixing is complete.

[0044] As a further embodiment of the present invention, the mating groove assembly includes a vertical groove 1801 and a draw-out inclined groove 1802; wherein one end of the vertical groove 1801 is connected to one end of the draw-out inclined groove 1802; when the draw-out protrusion 1601 is mated with the draw-out inclined groove 1802, the plunger 8 can slide in the suction sleeve 9.

[0045] In this embodiment, as the threaded sleeve 14 approaches the ground, the extraction protrusion 1601 first slides in the vertical groove 1801 (the lifting protrusion 1501 first slides in the inclined groove 1701), at which time the spraying shaft 18 does not rotate (the plunger 8 is located near the ground); then the extraction protrusion 1601 slides in the extraction inclined groove 1802 (the lifting protrusion 1501 slides in the vertical groove 1702), and through the squeezing action of the extraction protrusion 1601 on the groove wall of the extraction inclined groove 1802, the spraying shaft 18 can be driven to rotate in the forward direction, thereby driving the plunger 8 to slide inward in the suction sleeve 9 to spray the liquid medicine.

[0046] As the threaded sleeve 14 moves away from the ground, the extraction protrusion 1601 will first slide in the extraction inclined groove 1802 (the lifting protrusion 1501 will first slide in the vertical groove 1702), at which time the spraying shaft 18 will rotate in the opposite direction to drive the plunger 8 to slide outward in the suction sleeve 9 to refill the liquid; then the extraction protrusion 1601 will slide in the vertical groove 1801 (the lifting protrusion 1501 will slide in the inclined groove 1701), and the spraying shaft 18 will not rotate.

[0047] As a further embodiment of the present invention, the pressing structure includes a soil loosening sleeve 401 fixedly installed on the lifting plate 4 and sleeved with the soil loosening shaft 17; a soil loosening protrusion 402 is fixedly installed on the soil loosening sleeve 401; and a soil loosening groove group is provided on the soil loosening shaft 17 to slide and fit with the soil loosening protrusion 402.

[0048] As a further embodiment of the present invention, the loosening trough assembly includes an upper horizontal trough 1703, a descending inclined trough 1704, a lower horizontal trough 1705, and an ascending inclined trough 1706; wherein the two ends of the descending inclined trough 1704 are respectively connected to one end of the upper horizontal trough 1703 and the lower horizontal trough 1705, and the two ends of the ascending inclined trough 1706 are respectively connected to the other end of the upper horizontal trough 1703 and the lower horizontal trough 1705; and when the loosening protrusion 402 slides in cooperation with the descending inclined trough 1704 and the ascending inclined trough 1706, the lifting plate 4 can descend or ascend.

[0049] In this embodiment, when the loosening shaft 17 rotates in the forward direction, the loosening protrusion 402 will slide sequentially in the upper flat groove 1703, the descending inclined groove 1704, the lower flat groove 1705 and the ascending inclined groove 1706. When the loosening shaft 17 rotates in the reverse direction, the loosening protrusion 402 will slide sequentially in the upper flat groove 1703, the ascending inclined groove 1706, the lower flat groove 1705 and the descending inclined groove 1704.

[0050] Taking forward rotation as an example, when the loosening protrusion 402 slides in the upper flat groove 1703, the position of the loosening sleeve 401 remains unchanged, so the position of the lifting plate 4 remains unchanged; while when it slides in the descending inclined groove 1704, the squeezing action of the two can make the loosening sleeve 401 approach the ground, so that the lifting plate 4 can drive multiple sets of cutters 6 to approach the ground synchronously to perform the loosening action.

[0051] When the loose soil protrusion 402 slides in the lower flat groove 1705, the position of the lifting plate 4 remains unchanged, and the cutter 6 rotates in the soil; while sliding in the rising inclined groove 1706, the cutter 6 is driven to rise and reset through the combined action of the two.

[0052] By using rotating blades 6 to break up the soil to a certain depth, the soil becomes loose and porous, allowing the pesticide solution to penetrate more smoothly to the predetermined depth, avoiding waste and pollution caused by runoff on the surface of compacted soil. After spraying, the rotating blades 6 thoroughly mix the soil and pesticide solution, significantly accelerating the contact and reaction rate between the pesticide solution and pollutants in the soil (such as salt ions), making the remediation reaction more complete and uniform, and fundamentally improving the thoroughness and speed of remediation.

[0053] As a further embodiment of the present invention, the spraying structure includes a spraying plate 7 disposed on the vehicle frame 1, and multiple sets of plungers 8 are fixedly installed on the spraying plate 7; a spraying sleeve 701 that is sleeved with the spraying shaft 18 is fixedly installed on the spraying plate 7; a spraying protrusion 702 is fixedly installed on the spraying sleeve 701; and a spraying groove 1803 that slides with the spraying protrusion 702 is provided on the spraying shaft 18.

[0054] In this embodiment, when the spraying shaft 18 rotates in the forward direction, the spraying protrusion 702 can slide from the lower end to the upper end in the spraying chute 1803. Through the squeezing and cooperation between the spraying protrusion 702 and the chute wall of the spraying chute 1803, the spraying sleeve 701 can be driven to rise, so that multiple sets of plungers 8 can be driven to rise synchronously through the spraying plate 7 to spray the liquid medicine.

[0055] When the spraying shaft 18 rotates in the reverse direction, the spraying protrusion 702 slides from the upper end to the lower end in the spraying chute 1803. Through the squeezing and cooperation between the spraying protrusion 702 and the chute wall of the spraying chute 1803, the spraying sleeve 701 can be driven to descend, thereby driving multiple sets of plungers 8 to descend synchronously through the spraying plate 7, thus performing the spraying action. Since the sliding stroke of the plunger 8 is fixed, the amount of liquid sprayed each time is relatively fixed, which is conducive to estimating and controlling the amount of liquid used per unit area of ​​land, realizing scientific application of the pesticide, and avoiding waste of liquid or insufficient dosage.

[0056] As a further embodiment of the present invention, a fixing sleeve 19 is fixedly installed on the spray plate 7; a rotating rod 20 that is sleeved with the fixing sleeve 19 is rotatably installed on the frame 1, the rotating rod 20 having a reciprocating groove set, and a reciprocating protrusion 1901 fixedly installed on the fixing sleeve 19; a drive gear 2003 is fixedly installed on the rotating rod 20, and a sliding plate 21 connected to the nozzle 11 is slidably fitted on the frame 1; a tooth block 2101 that meshes with the drive gear 2003 is fixedly installed on the sliding plate 21; multiple sets of tooth grooves 2102 are formed on the sliding plate 21; and a reciprocating gear 1101 that meshes with the tooth grooves 2102 is fixedly installed on the nozzle 11.

[0057] As a further embodiment of the present invention, the reciprocating groove assembly includes a left inclined groove 2001 and a right inclined groove 2002 connected at the ends; wherein, when the reciprocating protrusion 1901 engages with the left inclined groove 2001 or the right inclined groove 2002, the drive gear 2003 can reciprocate to drive the nozzle 11 to oscillate back and forth.

[0058] In this embodiment, during the upward movement of the spray plate 7, the fixed sleeve 19 moves synchronously, thereby causing the reciprocating protrusion 1901 to slide sequentially in the left inclined groove 2001 and the right inclined groove 2002. Through the sliding engagement between the reciprocating protrusion 1901 and the left inclined groove 2001, the rotating rod 20 can be driven to rotate in the forward direction, and through the sliding engagement between the reciprocating protrusion 1901 and the right inclined groove 2002, the rotating rod 20 can be driven to rotate in the reverse direction.

[0059] During the reciprocating rotation of the rotating rod 20, it can drive the drive gear 2003 to rotate synchronously, and through the meshing action with the tooth block 2101, it can drive the slide plate 21 to slide back and forth, thereby driving the tooth groove 2102 to move back and forth. In turn, through the meshing action, it can drive the reciprocating gear 1101 to rotate back and forth, thereby driving the nozzle 11 to swing back and forth. This can effectively increase the area of ​​the medicine sprayed, improve the mixing effect of the subsequent mixing action, and further improve the thoroughness and speed of the repair.

[0060] A method for spraying chemicals to remediate saline-alkali land using the soil remediation spraying device described above includes the following steps: Step 1: Move the frame 1 to the saline-alkali land to be repaired; start the device, and drive module 2 will drive the cutter 6 to rotate. Step 2: The downward pressing structure drives the cutter 6 to descend or rise, and during the descent, the rotating cutter 6 breaks up the saline-alkali soil. Step 3: After the blade 6 rises and resets, the spraying structure sprays the medicine onto the soil that has been loosened; then the pressing structure drives the blade 6 to fall or rise again, so as to mix the soil and medicine by rotating the blade 6. Step 4: Move frame 1 to another saline-alkali land to be repaired; then repeat steps 2 and 3.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0062] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spraying device for soil remediation, comprising a frame; a drive module and a liquid tank are fixedly mounted on the frame; Its features are, It also includes multiple sets of pulleys rotatably mounted on the frame; the multiple sets of pulleys are connected by belts, and one of the pulley sets is connected to the output shaft of the drive module by a belt; The frame is equipped with a lifting plate, and multiple sets of rotating shafts that slide and engage with the pulley group are rotatably mounted on the lifting plate. Cutting tools are fixedly mounted on the rotating shafts. Multiple sets of suction sleeves are fixedly installed on the vehicle frame; the multiple sets of suction sleeves are connected to the medicine tank through a guide valve, and the suction sleeves are connected to a spray pipe through a one-way valve, and a nozzle is rotatably installed on the spray pipe; a plunger is slidably fitted inside the suction sleeve. The vehicle frame is equipped with a pressing structure and a spraying structure that work together. The pressing structure can drive the lifting plate to descend or rise, thereby moving multiple sets of blades closer to or away from the soil. At the end of the stroke of the blades moving away, the spraying structure can drive the plunger away from the vehicle frame to spray the pesticide.

2. The spraying device for soil remediation according to claim 1, characterized in that, A drive motor is fixedly mounted on the vehicle frame, and a lead screw is fixedly mounted on the output end of the drive motor. A threaded sleeve is threadedly connected to the lead screw. A soil loosening shaft and a spraying shaft are rotatably mounted on the vehicle frame. A lifting sleeve and a suction sleeve, respectively sleeved with the soil loosening shaft and the spraying shaft, are fixedly mounted on the threaded sleeve. A drive groove group and a mating groove group are respectively opened on the soil loosening shaft and the spraying shaft. A lifting protrusion and a suction protrusion, respectively slidably engaged with the drive groove group and the mating groove group, are fixedly mounted on the lifting sleeve and the suction sleeve.

3. The spraying device for soil remediation according to claim 2, characterized in that, The drive slot assembly includes an inclined slot and a vertical slot; wherein one end of the inclined slot is connected to one end of the vertical slot, and when the lifting protrusion slides in cooperation with the inclined slot, the lifting plate can descend or rise.

4. A spraying device for soil remediation according to claim 2, characterized in that, The mating groove assembly includes a vertical groove and a suction groove; one end of the vertical groove is connected to one end of the suction groove; when the suction protrusion mates with the suction groove, the plunger can slide in the suction sleeve.

5. A spraying device for soil remediation according to claim 2, characterized in that, The pressing structure includes a soil loosening sleeve fixedly installed on the lifting plate and sleeved with the soil loosening shaft; a soil loosening protrusion is fixedly installed on the soil loosening sleeve; and a soil loosening groove assembly is formed on the soil loosening shaft to slide and fit with the soil loosening protrusion.

6. A spraying device for soil remediation according to claim 5, characterized in that, The loosening trough assembly includes an upper horizontal trough, a descending inclined trough, a lower horizontal trough, and an ascending inclined trough; wherein the two ends of the descending inclined trough are respectively connected to one end of the upper horizontal trough and one end of the lower horizontal trough, and the two ends of the ascending inclined trough are respectively connected to the other end of the upper horizontal trough and the lower horizontal trough; and when the loosening protrusion slides in cooperation with the descending inclined trough and the ascending inclined trough, the lifting plate can descend or rise.

7. A spraying device for soil remediation according to claim 2, characterized in that, The spraying structure includes a spraying plate mounted on the vehicle frame, and multiple sets of plungers are fixedly mounted on the spraying plate; a spraying sleeve that is sleeved with the spraying shaft is fixedly mounted on the spraying plate; a spraying protrusion is fixedly mounted on the spraying sleeve; and a spraying groove that slides with the spraying protrusion is provided on the spraying shaft.

8. A spraying device for soil remediation according to claim 7, characterized in that, A fixed sleeve is fixedly installed on the spray plate; a rotating rod that is sleeved with the fixed sleeve is rotatably installed on the frame; the rotating rod has a set of reciprocating grooves; a reciprocating protrusion is fixedly installed on the fixed sleeve; a drive gear is fixedly installed on the rotating rod; a sliding plate connected to the nozzle is slidably fitted on the frame; a toothed block that meshes with the drive gear is fixedly installed on the sliding plate; multiple sets of toothed grooves are formed on the sliding plate; a reciprocating gear that meshes with the toothed grooves is fixedly installed on the nozzle.

9. A spraying device for soil remediation according to claim 8, characterized in that, The reciprocating groove assembly includes a left inclined groove and a right inclined groove connected at the ends; wherein, when the reciprocating protrusion engages with the left inclined groove or the right inclined groove, the drive gear can rotate reciprocally to drive the nozzle to swing back and forth.

10. A method for spraying a chemical solution to remediate saline-alkali land using a soil remediation spraying device as described in any one of claims 1-9, characterized in that, Includes the following steps, Step 1: Move the frame and place the device on the saline-alkali land to be repaired; start the device and drive the drive module to rotate the cutter. Step 2: The cutting tool is lowered or raised by the downward pressure structure, and during the descent, the rotating cutting tool breaks up the saline-alkali soil. Step 3: After the cutter rises and resets, the spraying structure sprays the medicine onto the soil that has been loosened; then the pressing structure drives the cutter to descend or rise again, so that the rotating cutter mixes the soil and medicine. Step 4: Move the vehicle frame and move the device to another saline-alkali land to be repaired; then repeat steps 2 and 3.

Images