A farmland soil underground pest control device

Abstract

The application relates to the technical field of pest control, in particular to a farmland soil underground pest control device, which comprises a harrow frame, a spraying mechanism and a control mechanism; the harrow frame is provided with harrow teeth and a cross beam; the spraying mechanism comprises a main pipe and a spraying pipe, the main pipe is arranged on the cross beam, and the spraying pipe is connected with the main pipe through a flexible connecting pipe; the control mechanism is used for controlling the spraying pipe to rotate around the flexible connecting pipe, so that the spraying pipe is switched between the vertical state and the horizontal state. The farmland soil turning and the directional pesticide spraying are realized through the harrow frame, the spraying mechanism and the control mechanism, the state adaptive switching function of the spraying pipe is realized when the spraying pipe is blocked, the effect that the pesticide penetrates into the middle layer or the deep layer of soil and the pest control effect is improved, meanwhile, the effect that the rigid collision between the spraying pipe and the obstacle is avoided to protect the equipment, and the problem that the pesticide of the traditional pest control device is difficult to penetrate into the deep layer of soil and leads to incomplete control is solved.

Description

Technical Field

[0001] This invention relates to the field of pest and disease control technology, specifically to a device for controlling underground pests and diseases in farmland soil. Background Technology

[0002] Wheat field pests and diseases are mainly divided into underground pests and above-ground pests. Above-ground pests and diseases can be controlled by directly spraying pesticides on the leaves. Underground pests, however, mainly concentrate in the shallow soil layer, damaging wheat roots and seedlings, and usually require control during the land preparation stage before sowing. However, after direct spraying of pesticides or granules, most of the sprayed pesticide is blown away by the wind due to the lack of crop cover in the field, affecting the control effect.

[0003] To this end, patent CN119422484B discloses a control mechanism for forestry soil pests and diseases. It features a shovel plate that, when used for high-temperature sterilization, can scoop up soil. The extension of the L-shaped connecting pipe's tail end can be controlled by a hydraulic rod, ensuring the tail end remains below ground level for precise sterilization. The high steam temperature reaches directly to areas where underground pests and pathogens reside, achieving targeted and precise elimination, improving the effectiveness and pertinence of control. Sufficient temperature allows the steam to penetrate deep into the soil layer, not only treating pests and diseases in the surface soil but also effectively eliminating hidden dangers in deeper soil layers, reducing the possibility of pest and disease recurrence. The steam diffuses underground, acting evenly on the surrounding soil, ensuring sterilization without blind spots and comprehensively purifying the soil environment.

[0004] However, steam pest control is costly, suitable only for small plots, and has limited effectiveness against deep-seated pests. Steam equipment is bulky, while wheat fields are often large, contiguous areas. Existing control equipment works by first loosening the soil and then delivering steam to fill soil gaps. Large-scale operations require additional steam equipment, significantly increasing costs and complicating operation. Therefore, existing equipment cannot effectively control underground pests in large wheat fields. Summary of the Invention

[0005] To address the aforementioned problems, a soil pest and disease control device for farmland is provided. This device, through a rake frame, spraying mechanism, and control mechanism, solves the problem that traditional control equipment cannot control pests and diseases in the middle layer of soil.

[0006] To address the problems of existing technologies, this invention provides a device for controlling underground pests and diseases in farmland soil, including a rake frame, a spraying mechanism, and a control mechanism; the rake frame is equipped with rake teeth and a crossbeam; the spraying mechanism includes a main pipe and a spray pipe, the main pipe is set on the crossbeam, and the spray pipe is connected to the main pipe through a flexible connecting pipe; the control mechanism is used to control the spray pipe to rotate around the flexible connecting pipe, so that the spray pipe switches between vertical and horizontal states.

[0007] Preferably, the spraying mechanism includes a main rod and a secondary rod; the main rod is fixedly connected to the crossbeam, and the end of the main rod away from the crossbeam is rotatably connected to one end of the secondary rod; the main rod and the secondary rod are respectively connected to the main pipe and the spray pipe.

[0008] Preferably, the control mechanism includes a stabilizing component and a damping telescopic rod; the stabilizing component is used to maintain the horizontal or vertical state of the spray pipe; the two ends of the damping telescopic rod are respectively hinged to the rake frame and the auxiliary rod.

[0009] Preferably, the stabilizing component includes a support rod and a tension spring; the support rod is mounted on the main rod; the two ends of the tension spring are connected to the support rod and the auxiliary rod respectively; the main rod is provided with a limiting block and a limiting plate for limiting the rotation range of the auxiliary rod.

[0010] Preferably, the damping telescopic rod is a unidirectional damping rod, which is damped when it extends.

[0011] Preferably, the spray tube is provided with a switching mechanism, which includes a rotating nozzle located at the end of the spray tube away from the main tube and a lateral spray hole on the side of the spray tube; the auxiliary rod is provided with a switching component for controlling the opening and closing of the rotating nozzle and the lateral spray hole.

[0012] When the auxiliary rod is in a vertical position, the switching component opens the rotating nozzle and closes the side nozzle. When the angle between the auxiliary rod and the horizontal plane increases to a threshold, the switching component closes the rotating nozzle and opens the side nozzle.

[0013] Preferably, the switching assembly includes a cover plate and a head; the cover plate is slidably mounted on the spray pipe and is used to block the lateral spray holes; the head is disposed on the rotating nozzle, and the end of the spray pipe away from the main pipe has an end spray hole that cooperates with the rotating nozzle, and the head is used to close the end spray hole.

[0014] The spray nozzle is equipped with control components for controlling the movement of the cover plate and end cap.

[0015] Preferably, the control assembly includes a side plate, a connecting rod, a support plate, a bracket, and an elastic element;

[0016] The side plates are mounted on the rake frame;

[0017] The two ends of the connecting rod are connected to the cover plate and the bracket respectively via rods;

[0018] The support plate is connected to the auxiliary rod, the rotating nozzle is rotatably mounted on the bracket, and the two ends of the elastic element are connected to the support plate and the bracket respectively.

[0019] When the spray nozzle comes into contact with the side plate during rotation, the rotating nozzle is squeezed by the side plate and moves towards the spray nozzle, and the end cap seals the end nozzle of the spray nozzle.

[0020] Preferably, the rake teeth are provided in two sets, with the two sets of rake teeth located on both sides of the spraying mechanism, and the two sets of rake teeth are staggered along the horizontal direction.

[0021] Preferably, the rake frame is provided with a connecting frame for connecting to the vehicle.

[0022] The advantages of this invention compared to the prior art are:

[0023] 1. This invention achieves the function of adaptive switching between soil turning and directional spraying of pesticides in farmland through a rake frame, spraying mechanism and control mechanism, and when the spray pipe is blocked. It achieves the effect of pesticides penetrating into the middle or deep soil to improve the control effect of pests and diseases, while avoiding rigid collision between the spray pipe and obstacles to protect the equipment. It solves the problem of pesticides being difficult to penetrate into the deep soil in traditional pest and disease control devices, resulting in incomplete control.

[0024] 2. This invention achieves structural stability support when the spray pipe rotates, thereby improving the stability of the spray pipe when switching between vertical spraying and horizontal obstacle avoidance states, preventing pesticide spraying deviation, and enhancing the overall structural strength of the spraying mechanism. It solves the technical problem that traditional spray pipes, which rely solely on flexible connecting pipes for support, are prone to shaking, leading to unstable pesticide spraying positions.

[0025] 3. This invention achieves stable maintenance and switching buffer functions for the spray pipe state, thereby improving the stability of the spray pipe during vertical spraying and horizontal obstacle avoidance, reducing rigid impact during switching, and extending the service life of the spraying mechanism. Attached Figure Description

[0026] Figure 1 This is a first-view perspective three-dimensional schematic diagram of a soil disease and pest control device for farmland according to the present invention.

[0027] Figure 2 This is a second-view perspective three-dimensional schematic diagram of a soil disease and pest control device for farmland according to the present invention.

[0028] Figure 3 This is a three-dimensional schematic diagram of the spraying mechanism, control mechanism, and switching mechanism of a soil pest and disease control device for farmland according to the present invention.

[0029] Figure 4 This is a three-dimensional schematic diagram of the spraying mechanism of a soil pest and disease control device for farmland according to the present invention, with the spray pipe in a vertical position.

[0030] Figure 5 This is a first-view perspective three-dimensional schematic diagram of the spraying mechanism of a soil pest and disease control device for farmland according to the present invention, when the spraying pipe is in a horizontal state.

[0031] Figure 6This is a second-view perspective three-dimensional schematic diagram of the spraying mechanism of a soil pest and disease control device for farmland according to the present invention, when the spraying pipe is in a horizontal state.

[0032] Figure 7 This is the invention Figure 6 A magnified view of a portion of point A in the middle.

[0033] Figure 8 This is a three-dimensional exploded view of the spray pipe, rotating nozzle and control components of a soil pest and disease control device for farmland according to the present invention.

[0034] Figure 9 This is a three-dimensional schematic diagram of the spraying mechanism of a soil pest and disease control device for farmland, in which the spraying pipe is in a horizontal state and cooperates with the damping telescopic rod.

[0035] Figure 10 This is a three-dimensional schematic diagram of a soil pest and disease control device for farmland according to the present invention, after being connected to a carrier via a connecting frame.

[0036] The diagram is labeled as follows: 1. Rake frame; 11. Rake teeth; 12. Crossbeam; 13. Connecting frame; 2. Spraying mechanism; 21. Main pipe; 22. Spray pipe; 23. Main rod; 231. Limiting block; 232. Limiting plate; 24. Secondary rod; 3. Control mechanism; 31. Stabilizing component; 311. Support rod; 312. Tension spring; 32. Damping telescopic rod; 4. Switching mechanism; 41. Rotating nozzle; 42. Side spray hole; 43. Switching component; 431. Cover plate; 411. End cap; 44. Control component; 441. Side plate; 442. Connecting rod; 443. Support plate; 444. Bracket; 445. Elastic element. Detailed Implementation

[0037] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1-4 A device for controlling underground diseases and pests in farmland soil includes a rake frame 1, a spraying mechanism 2, and a control mechanism 3. The rake frame 1 is provided with rake teeth 11 and a crossbeam 12. The spraying mechanism 2 includes a main pipe 21 and a spray pipe 22. The main pipe 21 is set on the crossbeam 12, and the spray pipe 22 is connected to the main pipe 21 through a flexible connecting pipe. The control mechanism 3 is used to control the spray pipe 22 to rotate around the flexible connecting pipe, so that the spray pipe 22 switches between vertical and horizontal states.

[0039] This invention, through a rake frame 1, a spraying mechanism 2, and a control mechanism 3, achieves soil turning and targeted pesticide spraying in farmland, as well as adaptive switching when the spray pipe 22 is obstructed. This allows the pesticide to penetrate deep into the middle or deep soil layers, improving pest and disease control. Simultaneously, it avoids rigid collisions between the spray pipe 22 and obstacles, protecting the equipment and solving the problem of incomplete pest and disease control caused by the difficulty of pesticides penetrating deep soil layers in traditional devices. During operation, as the device moves through the farmland, the rake teeth 11 on the rake frame 1 loosen the soil, and the main pipe 21 of the spraying mechanism 2 delivers the pesticide. Meanwhile, the spray pipe 22 remains vertical under the control mechanism 3, spraying the pesticide into the loosened middle or deep soil layers. When the spray pipe 22 encounters an obstacle in the soil, the control mechanism 3 controls the spray pipe 22 to rotate around the flexible connecting pipe, so that the spray pipe 22 switches from a vertical state to a horizontal state, avoiding a rigid collision with the obstacle; after the device avoids the obstacle, the control mechanism 3 controls the spray pipe 22 to rotate back to a vertical state around the flexible connecting pipe, which not only ensures the pest and disease control effect, but also protects the spray pipe 22, improving the reliability and service life of the device.

[0040] Reference Figure 3 and Figure 4 The spraying mechanism 2 includes a main rod 23 and a secondary rod 24; the main rod 23 is fixedly connected to the crossbeam 12, and the end of the main rod 23 away from the crossbeam 12 is rotatably connected to one end of the secondary rod 24; the main rod 23 and the secondary rod 24 are respectively connected to the main pipe 21 and the spray pipe 22.

[0041] This invention provides structural stability support for the spray pipe 22 during rotation, improving its stability when switching between vertical spraying and horizontal obstacle avoidance modes, preventing pesticide spraying deviation, and enhancing the overall structural strength of the spraying mechanism 2. It solves the technical problem of unstable pesticide spraying position caused by the traditional spray pipe 22 relying solely on a flexible connecting pipe for support, which is prone to swaying. During operation, the rake teeth 11 on the rake frame 1 loosen the soil as the device moves. The main pipe 21, fixed to the crossbeam 12 by the main rod 23, transports the pesticide. The pesticide enters the spray pipe 22, connected to the auxiliary rod 24, through the flexible connecting pipe. At this time, the control mechanism 3 keeps the spray pipe 22 vertical. The rotational connection between the main rod 23 and the auxiliary rod 24 provides stable support for the spray pipe 22, allowing the pesticide to be accurately sprayed into the deep soil. When the spray pipe 22 encounters an obstacle, the control mechanism 3 controls the spray pipe 22 to rotate around the flexible connecting pipe. At the same time, the auxiliary rod 24 rotates with the spray pipe 22 around the main rod 23, allowing the spray pipe 22 to smoothly switch to a horizontal state to avoid the obstacle. After avoiding the obstacle, the control mechanism 3 controls the spray pipe 22 to rotate back to a vertical state, and the auxiliary rod 24 also rotates with the spray pipe 22 around the main rod 23 back to its original position, continuing to spray the agent stably. At the same time, the support of the main rod 23 and the auxiliary rod 24 can improve the structural strength and prevent the main pipe 21 and the spray pipe 22 from being damaged during operation.

[0042] Reference Figures 1-3 The control mechanism 3 includes a stabilizing component 31 and a damping telescopic rod 32; the stabilizing component 31 is used to maintain the horizontal or vertical state of the spray pipe 22; the two ends of the damping telescopic rod 32 are respectively hinged to the rake frame 1 and the auxiliary rod 24.

[0043] This invention achieves stable maintenance and switching buffer functions for the spray pipe 22, thereby improving the stability of the spray pipe 22 during vertical spraying and horizontal obstacle avoidance, reducing rigid impact during switching, and extending the service life of the spraying mechanism 2. During operation, as the device moves through the farmland, the rake teeth 11 on the rake frame 1 loosen the soil. The stabilizing component 31 begins to maintain the vertical state of the spray pipe 22. The damping telescopic rod 32 provides support for the auxiliary rod 24. The pesticide delivered by the main pipe 21 enters the spray pipe 22 through the flexible connecting pipe, accurately spraying it into the deep soil. The stabilizing component 31 prevents the spray pipe 22 from swaying arbitrarily due to device movement or soil resistance. When the spray pipe 22 encounters an obstacle in the soil, the pressure on the auxiliary rod 24 increases, the damping telescopic rod 32 contracts, and the auxiliary rod 24 drives the spray pipe 22 to rotate around the main rod 23 to a horizontal state, preventing rigid collisions between the spray pipe 22 and the obstacle. Subsequently, the damping telescopic rod 32 gradually releases its elastic potential energy, driving the auxiliary rod 24 to reset, allowing the device to avoid obstacles, and the spray pipe 22 to continue spraying the agent into the deep soil.

[0044] Reference Figures 3-5 , Figure 9 The stabilizing component 31 includes a support rod 311 and a tension spring 312; the support rod 311 is mounted on the main rod 23; the two ends of the tension spring 312 are connected to the support rod 311 and the auxiliary rod 24 respectively; the main rod 23 is provided with a limiting block 231 and a limiting plate 232 for limiting the rotation range of the auxiliary rod 24.

[0045] This invention achieves the elastic stability maintenance and precise rotation range limitation of the spray pipe 22, realizing the effect of maintaining the state of the auxiliary rod 24 by relying on the tension of the tension spring 312 and the cooperation of the limiting structure. During operation, the device moves in the farmland, the rake teeth 11 loosen the soil, and the tension spring 312, in its naturally stretched state, pulls the auxiliary rod 24, causing it to abut against the limiting plate 232 on the main rod 23. At this time, the auxiliary rod 24 remains vertical, and the spray pipe 22 is simultaneously in a vertical state. The pesticide delivered by the main pipe 21 enters the spray pipe 22 through the flexible connecting pipe and is sprayed into the deep soil. When the spray pipe 22 encounters an obstacle in the soil, the obstacle compresses the auxiliary rod 24, causing the auxiliary rod 24 to rotate around the main rod 23. The auxiliary rod 24 stretches the tension spring 312 and disengages from the limiting plate 232. The damping telescopic rod 32 then contracts to buffer the rotational impact until the auxiliary rod 24 abuts against the limiting block 231 on the main rod 23, and the auxiliary rod 24 remains horizontal. Then, under the elastic force provided by the damping telescopic rod 32, the auxiliary rod 24 is pushed to rotate in the opposite direction. The auxiliary rod 24 disengages from the limiting block 231 and gradually approaches the limiting plate 232, finally abutting against the limiting plate 232 and returning to vertical. The spray pipe 22 also returns to a vertical state and continues to spray the agent.

[0046] Reference Figures 3-5 The damping telescopic rod 32 is a one-way damping rod, and it is damped when it extends.

[0047] This invention enables the spray pipe 22 to quickly avoid obstacles and return to a stable, smooth position, thus preventing damage from rigid collisions between the spray pipe 22 and obstacles. It also prevents excessively rapid repositioning from causing spray deviation or component wear. When the spray pipe 22 comes into contact with an obstacle in the soil, the compression causes the auxiliary rod 24 to rotate horizontally. The auxiliary rod 24 compresses the damping telescopic rod 32. During this process, the damping telescopic rod 32 has no damping effect, allowing the spray pipe 22 to quickly bend to a horizontal position and avoid the obstacle. Then, the damping telescopic rod 32 releases its elastic force, causing the auxiliary rod 24 to rotate in the opposite direction. Simultaneously, the extension of the damping telescopic rod 32 generates a damping effect, allowing the auxiliary rod 24 to smoothly reposition the spray pipe 22, enabling it to smoothly avoid the obstacle. In the latter half of the rotation, the tension spring 312 of the stabilizing component 31, combined with the elastic force of the damping telescopic rod 32, slowly returns the spray pipe 22 to a vertical position, continuing to spray the pesticide into the deeper soil.

[0048] Reference Figure 1 , Figures 4-6The spray tube 22 is equipped with a switching mechanism 4, which includes a rotating nozzle 41 located at the end of the spray tube 22 away from the main tube 21 and a lateral spray hole 42 on the side of the spray tube 22. The auxiliary rod 24 is equipped with a switching component 43 for controlling the opening and closing of the rotating nozzle 41 and the lateral spray hole 42. When the auxiliary rod 24 is in a vertical state, the switching component 43 opens the rotating nozzle 41 and closes the lateral spray hole 42. When the angle between the auxiliary rod 24 and the horizontal plane increases to a threshold value, the switching component 43 closes the rotating nozzle 41 and opens the lateral spray hole 42.

[0049] This invention enables the spraying pipe 22 to automatically switch the spraying direction according to the state of the auxiliary rod 24, achieving the effect of automatically adjusting the spraying direction during obstacle avoidance. When the spraying pipe 22 encounters an obstacle, it drives the auxiliary rod 24 to rotate, increasing the angle between the auxiliary rod 24 and the horizontal plane to a threshold value. At this point, the switching component 43 immediately closes the rotating nozzle 41 and opens the side spray hole 42. The pesticide is sprayed onto the soil surface from the side spray hole 42 on the side of the spraying pipe 22, preventing the spraying pipe 22 from tilting and affecting the spraying effect. After the device avoids the obstacle, the auxiliary rod 24 returns to a vertical position, and the switching component 43 switches back to opening the rotating nozzle 41 and closing the side spray hole 42. The pesticide is then sprayed from the rotating nozzle 41 onto the deeper soil.

[0050] Reference Figure 2 , Figure 3 , Figures 6-8 The switching component 43 includes a cover plate 431 and a cap 411; the cover plate 431 is slidably mounted on the spray pipe 22 and is used to block the lateral spray hole 42; the cap 411 is disposed on the rotating nozzle 41, and the end of the spray pipe 22 away from the main pipe 21 is provided with an end spray hole that cooperates with the rotating nozzle 41, and the cap 411 is used to close the end spray hole; the spray pipe 22 is provided with a control component 44 for controlling the movement of the cover plate 431 and the cap 411.

[0051] This invention enables the switching function between the rotating nozzle 41 and the lateral spray hole 42 of the spray pipe 22. When the auxiliary rod 24 is in a vertical position, the control component 44 drives the end cap 411 to separate from the spray pipe 22, opening the rotating nozzle 41. At the same time, the control plate 431 slides on the spray pipe 22 to the position of blocking the lateral spray hole 42, and the agent delivered by the main pipe 21 is sprayed into the deep soil through the spray pipe 22 from the rotating nozzle 41. When the spray pipe 22 encounters an obstacle and drives the auxiliary rod 24 to rotate, the angle between the auxiliary rod 24 and the horizontal plane increases to a threshold value, and the control component 44 drives the end cap 411 to rotate. 1. The nozzle 41 is tightly engaged with the end nozzle, thereby closing the rotating nozzle 41. At the same time, the control cover plate 431 slides away from the side nozzle 42 on the spray pipe 22, opening the side nozzle 42, and the agent is sprayed from the side nozzle 42 onto the soil surface. After the device avoids the obstacle, the auxiliary rod 24 returns to the vertical position, and the control component 44 drives the end cap 411 to separate from the spray pipe 22 again, the cover plate 431 blocks the side nozzle 42, and the rotating nozzle 41 reopens to spray the agent into the deep soil.

[0052] Reference Figures 6-8 The control assembly 44 includes a side plate 441, a connecting rod 442, a support plate 443, a bracket 444, and an elastic element 445. The side plate 441 is mounted on the rake frame 1. The two ends of the connecting rod 442 are connected to the cover plate 431 and the bracket 444 respectively via rods. The support plate 443 is connected to the auxiliary rod 24. The rotating nozzle 41 is rotatably mounted on the bracket 444. The two ends of the elastic element 445 are connected to the support plate 443 and the bracket 444 respectively.

[0053] When the spray pipe 22 comes into contact with the side plate 441 during rotation, the rotating nozzle 41 is squeezed by the side plate 441 and moves toward the spray pipe 22, and the end cap 411 seals the end spray hole of the spray pipe 22.

[0054] This invention achieves the function of mechanically triggering the switching of spray nozzles on the spray pipe 22, achieving the effect of switching nozzle states without additional power. During operation, the auxiliary rod 24 is in a vertical state, the spray pipe 22 is not in contact with the side plate 441, the elastic element 445 remains in a natural state supporting the bracket 444, and the rotating nozzle 41 is positioned on the bracket 444 away from the spray pipe 22. The end cap 411 does not seal the end spray hole, and the cover plate 431 seals the lateral spray hole 42. The pesticide delivered by the main pipe 21 is sprayed into the deep soil through the rotating nozzle 41. When the spray pipe 22 encounters an obstacle, it causes the auxiliary rod 24 to rotate. During rotation, the spray pipe 22 contacts the side plate 441, which compresses the rotating nozzle 41. The rotating nozzle 41 causes the bracket 444 to move closer to the spray pipe 22, and the bracket 444 compresses the elastic element 445. When the support 444 pulls the cover plate 431 through the connecting rod 442 and the rod, it slides to open the side spray hole 42. The end cap 411 moves with the rotating nozzle 41 and closely cooperates with the spray pipe 22 to close the end spray hole. The agent is sprayed from the side spray hole 42 to the shallow soil. After the device avoids the obstacle, the spray pipe 22 is reset with the auxiliary rod 24 and disengages from the side plate 441. The squeezing effect disappears, the elastic element 445 rebounds and pushes the support 444 to reset. The support 444 drives the rotating nozzle 41 away from the spray pipe 22. The end cap 411 releases the seal on the end spray hole. The connecting rod 442 and the rod drive the cover plate 431 to reset and block the side spray hole 42. The agent is sprayed from the rotating nozzle 41 to the deep soil again.

[0055] Reference Figure 1 , Figure 2 and Figure 10 The rake teeth 11 are provided in two sets, and the two sets of rake teeth 11 are located on both sides of the spraying mechanism 2, and the two sets of rake teeth 11 are staggered along the horizontal direction.

[0056] This invention achieves comprehensive soil loosening without blind spots in farmland. During operation, as the device moves across the farmland, the two sets of rake teeth 11 on both sides of the spraying mechanism 2 simultaneously enter the soil and loosen it. Because the two sets of rake teeth 11 are horizontally staggered, the gaps left by one set of rake teeth 11 after loosening the soil are filled and loosened by the other set of rake teeth 11, achieving comprehensive loosening of the farmland soil without any dead corners. The loosened soil forms a uniform loose layer, and the spray pipe 22 of the spraying mechanism 2 sprays the pesticide according to the state. The deeply loosened soil allows the pesticide to better penetrate into the middle or deep soil layers. The staggered design of the rake teeth 11 also avoids the situation where local soil compaction is not turned over, ensuring that the pesticide is in full contact with the soil, comprehensively covering the soil layer where pests and diseases are hidden, and improving the overall pest and disease control effect.

[0057] Reference Figure 1 , Figure 2 and Figure 10 The rake frame 1 is equipped with a connecting frame 13 for connecting with the vehicle.

[0058] This invention enables convenient connection with various agricultural implements. During operation, the connecting frame 13 is fixed to the connection point of the agricultural implement, and the implement drives the harrow frame 1 to move in the field. The two sets of staggered harrow teeth 11 on the harrow frame 1 simultaneously enter the soil to loosen it. The spraying mechanism 2 switches the spray pipe 22 state according to the soil conditions and sprays the pesticide. No manual pushing is required, which greatly reduces labor intensity, while ensuring the speed of operation and the uniformity of pest and disease control, thus improving the overall efficiency of farmland operations.

[0059] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A device for controlling underground diseases and pests in farmland soil, characterized in that, Includes the rake frame, spraying mechanism, and control mechanism; The rake frame is equipped with rake teeth and crossbeams; The spraying mechanism includes a main pipe and a spray pipe. The main pipe is mounted on a crossbeam, and the spray pipe is connected to the main pipe via a flexible connecting pipe. The control mechanism is used to control the rotation of the spray tube around the flexible connecting tube, so that the spray tube can switch between vertical and horizontal states. The spraying mechanism includes a main pole and a secondary pole; The main rod is fixedly connected to the crossbeam, and the end of the main rod away from the crossbeam is rotatably connected to one end of the auxiliary rod; The main rod and the auxiliary rod are connected to the main pipe and the spray pipe, respectively; The spray tube is equipped with a switching mechanism, which includes a rotating nozzle located at the end of the spray tube away from the main tube and a lateral spray hole on the side of the spray tube. The auxiliary rod is equipped with a switching component for controlling the opening and closing of the rotating nozzle and the side nozzles; When the auxiliary rod is in a vertical position, the switching component opens the rotating nozzle and closes the side nozzle. When the angle between the auxiliary rod and the horizontal plane increases to a threshold, the switching component closes the rotating nozzle and opens the side nozzle. The switching components include a cover plate and a head; The cover plate is slidably installed on the spray pipe, and the cover plate is used to block the side spray holes; The end cap is set on the rotating nozzle, and the end of the spray tube away from the main tube has an end spray hole that cooperates with the rotating nozzle. The end cap is used to close the end spray hole. The spray nozzle is equipped with control components for controlling the movement of the cover plate and end cap; The control components include side plates, connecting rods, support plates, brackets, and elastic elements; The side plates are mounted on the rake frame; The two ends of the connecting rod are connected to the cover plate and the bracket respectively via rods; The support plate is connected to the auxiliary rod, the rotating nozzle is rotatably mounted on the bracket, and the two ends of the elastic element are connected to the support plate and the bracket respectively. When the spray nozzle comes into contact with the side plate during rotation, the rotating nozzle is squeezed by the side plate and moves towards the spray nozzle, and the end cap seals the end nozzle of the spray nozzle.

2. The soil-borne pest and disease control device for farmland according to claim 1, characterized in that, The control mechanism includes a stabilizing component and a damping telescopic rod; Stabilizing components are used to maintain the horizontal or vertical position of the spray nozzle; The two ends of the damping telescopic rod are hinged to the rake frame and the auxiliary rod, respectively.

3. The soil-borne pest and disease control device for farmland according to claim 2, characterized in that, The stabilizing components include struts and tension springs; The support rod is installed on the main rod; The two ends of the tension spring are connected to the support rod and the auxiliary rod, respectively; The main rod is equipped with a limiting block and a limiting plate to restrict the rotation range of the secondary rod.

4. The soil-borne pest and disease control device for farmland according to claim 2, characterized in that, The damping telescopic rod is a unidirectional damping rod, and it is damped when it extends.

5. The soil-borne pest and disease control device for farmland according to claim 1, characterized in that, The rake teeth are provided in two sets, which are located on both sides of the spraying mechanism and are staggered in the horizontal direction.

6. The soil-borne pest and disease control device for farmland according to claim 1, characterized in that, The rake frame is equipped with a connecting frame for connecting to the vehicle.

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