A liquid fertilizer application device for agricultural production

Abstract

This invention proposes a liquid fertilizer application device for agricultural production, belonging to the technical field of liquid fertilizer application devices. It includes a storage tank with support frames fixedly installed on both sides. Each support frame has rotatably mounted casters. A storage chamber is formed inside the storage tank, and a working shaft is rotatably mounted within the storage chamber. This invention provides a liquid fertilizer application device for agricultural production. Through the design of the storage tank, support frames, casters, working shaft, stirring blades, transmission mechanism, spray pipe, piston plate, and one-way sealing structure, when applying liquid fertilizer, simply moving the entire device is sufficient to complete the mixing of liquid fertilizer and water, resulting in a more uniform mixture. It can also automatically complete the spraying operation of liquid fertilizer without the need for a motor or engine, reducing the risk of energy shortages, lowering costs, and making it suitable for farmers and small-scale planting areas. It also reduces the labor intensity of farmers and improves work efficiency.

Description

Technical Field

[0001] This invention relates to the field of liquid fertilizer application devices, and more particularly to a liquid fertilizer application device for agricultural production. Background Technology

[0002] Liquid fertilizer, also known as fluid fertilizer or liquid fertilizer, is a liquid product containing at least one nutrient element required by crops. Liquid fertilizers typically contain major nutrients such as nitrogen, phosphorus, and potassium, as well as various trace elements. These nutrients exist in water in ionic form, making them easily absorbed by plant roots.

[0003] The history of liquid fertilizers can be traced back 200 years. After a long period of development, they have now formed many types, mainly including liquid nitrogen fertilizers and liquid compound fertilizers. There are many varieties of liquid fertilizers, including amino acids, humic acid, trace elements, medium elements, macro elements, and organic water-soluble fertilizers.

[0004] In agriculture, liquid fertilizers are typically applied through irrigation, watering, spraying, and foliar spraying. In rural farmland or small-scale planting areas, most farmers still manually irrigate or use backpack or shoulder-mounted sprayers to apply liquid fertilizers to crops. This results in high labor intensity and low work efficiency for farmers. On the other hand, vehicle-mounted sprayers and large drone spraying systems are used for large-area crop spraying, but they are costly. Vehicle-mounted sprayers are bulky and can easily damage the soil, while drones require multiple spare batteries, increasing costs. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes a liquid fertilizer application device for agricultural production.

[0006] This invention proposes a liquid fertilizer application device for agricultural production, comprising a storage tank, with support frames fixedly installed on both sides of the storage tank, and movable wheels rotatably installed on both support frames. A storage cavity is opened inside the storage tank, and a working shaft is rotatably installed inside the storage cavity. Multiple stirring blades are circumferentially connected to the outer periphery of the working shaft. A transmission mechanism is provided between the movable wheels and the working shaft. When the movable wheels rotate, the transmission mechanism can convert the rotation of the movable wheels into the rotation of the working shaft and stirring blades within the storage cavity.

[0007] A spray pipe connected to the storage chamber is fixedly installed at the bottom of the storage tank. Spray holes are provided on both sides of the spray pipe. A piston plate is slidably installed inside the spray pipe. Multiple liquid inlet holes are provided through the piston plate. A one-way sealing structure capable of blocking the liquid inlet holes is installed on the piston plate. A linkage mechanism is provided between the working shaft and the piston plate. When the working shaft rotates, the linkage mechanism can convert the rotation of the working shaft into the reciprocating sliding of the piston plate in the spray pipe. When the piston plate slides upward in the spray pipe, the one-way sealing structure opens, and the liquid fertilizer in the storage chamber can enter the spray pipe through the liquid inlet holes. When the piston plate slides downward in the spray pipe, the one-way sealing structure closes, and the liquid fertilizer in the spray pipe is squeezed out through the spray holes.

[0008] Preferably, the transmission mechanism includes a first bevel gear, a second bevel gear, a transmission shaft, a third bevel gear, and a fourth bevel gear; the movable wheel is rotatably mounted on a support frame via a rotating shaft, a first transmission groove is formed in the support frame, the first bevel gear is fixedly mounted on the rotating shaft of the movable wheel, the second bevel gear is located in the first transmission groove and meshes with the first bevel gear, the transmission shaft is rotatably mounted in the support frame, one end of the transmission shaft is fixedly connected to the second bevel gear, a second transmission groove is also formed in the support frame, the third bevel gear is fixedly mounted on the other end of the transmission shaft, the third bevel gear is located in the second transmission groove, the fourth bevel gear is located in the second transmission groove, the fourth bevel gear meshes with the third bevel gear, and the fourth bevel gear is fixedly connected to the end of the working shaft.

[0009] Preferably, the linkage mechanism includes an eccentric block, an eccentric shaft, a connecting rod, and a linear rod; the middle section of the working shaft located in the liquid storage cavity is in a disconnected state; there are two eccentric blocks, which are respectively fixedly installed at the two ends of the disconnected working shaft; both ends of the eccentric shaft are respectively fixedly connected to the two eccentric blocks; the eccentric shaft is arranged parallel to the working shaft, and the axes of the eccentric shaft and the working shaft do not coincide; one end of the connecting rod is rotatably fitted onto the eccentric shaft; the other end of the connecting rod is rotatably connected to the linear rod; and the end of the linear rod away from the connecting rod is fixedly connected to the piston plate.

[0010] Preferably, a stabilizing frame is fixedly installed at the opening of the spray pipe, and the straight rod slides through the stabilizing frame.

[0011] Preferably, there are multiple stirring blades, which are arranged symmetrically about an eccentric axis on the working shaft.

[0012] Preferably, the one-way sealing structure includes a sealing plate; the bottom of the piston plate is provided with a sealing groove that rotates with the sealing plate, the sealing plate is rotatably installed in the sealing groove via a rotating shaft, and a torsion spring is fitted on the rotating shaft of the sealing plate, the torsion spring can drive the sealing plate to rotate and seal the bottom opening of the liquid inlet.

[0013] Preferably, the spray pipe is equipped with an adjustment structure that can block the spray holes. When the piston plate moves upward in the spray pipe, the adjustment structure can block the spray holes. When the piston plate moves downward in the spray pipe, the adjustment structure can open the spray holes.

[0014] Preferably, the adjustment structure includes an adjustment plug, a limiting rod, and a return spring; the adjustment plug is slidably installed inside the spray pipe, the limiting rod is fixedly installed at the bottom end of the adjustment plug, the limiting rod slides through the bottom end of the spray pipe, the return spring is fitted on the limiting rod, and the two ends of the return spring are fixedly connected to the bottom end of the adjustment plug and the bottom inner wall of the spray pipe, respectively.

[0015] The adjusting plug can cover the spray nozzle.

[0016] Preferably, the liquid storage tank is equipped with a feed inlet; a handrail is fixedly installed on one side of the liquid storage tank; and a support leg is fixedly connected to the bottom of the liquid storage tank near the handrail.

[0017] The liquid fertilizer application device for agricultural production proposed in this invention has the following beneficial effects: Through the design of a storage tank, support frame, moving wheels, working shaft, stirring blades, transmission mechanism, spray pipe, piston plate, and one-way sealing structure, when applying liquid fertilizer, simply moving the entire device is sufficient to complete the mixing of liquid fertilizer and water, resulting in a more uniform mixture. It can also automatically complete the spraying operation of liquid fertilizer without the need for a motor or engine, reducing the risk of energy shortages, lowering costs, and making it suitable for farmers and small-scale planting areas. It also reduces the labor intensity of farmers and improves work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a liquid fertilizer application device for agricultural production proposed in this invention.

[0019] Figure 2 This is a cross-sectional view of a liquid fertilizer application device for agricultural production proposed in this invention;

[0020] Figure 3 This is a schematic diagram of the spray pipe structure in an agricultural liquid fertilizer application device proposed in this invention;

[0021] Figure 4This is a schematic diagram of the working shaft, eccentric block, and eccentric shaft in an agricultural liquid fertilizer application device proposed in this invention.

[0022] Figure 5 This is a cross-sectional view of the support frame and moving wheels in an agricultural liquid fertilizer application device proposed in this invention.

[0023] Figure 6 This is a cross-sectional view of the spray pipe in an agricultural liquid fertilizer application device proposed in this invention.

[0024] Figure 7 This is a cross-sectional view of the piston plate in an agricultural liquid fertilizer application device proposed in this invention.

[0025] Figure 8 This is a schematic diagram of the adjusting plug and limiting rod in an agricultural liquid fertilizer application device proposed in this invention.

[0026] In the diagram: 1. Storage tank; 2. Support frame; 3. Casters; 4. Working shaft; 5. Spray pipe; 6. Spray hole; 7. Stirring blade; 8. Piston plate; 9. Inlet hole; 10. Bevel gear No. 1; 11. Bevel gear No. 2; 12. Drive shaft; 13. Bevel gear No. 3; 14. Bevel gear No. 4; 15. Eccentric block; 16. Eccentric shaft; 17. Connecting rod; 18. Straight rod; 19. Stabilizer; 20. Sealing plate; 21. Adjusting plug; 22. Limiting rod; 23. Return spring; 24. Handrail; 25. Support leg. Detailed Implementation

[0027] Reference Figures 1-8This invention proposes a liquid fertilizer application device for agricultural production, comprising a storage tank 1, with support frames 2 fixedly installed on both sides of the storage tank 1, and movable wheels 3 rotatably mounted on each support frame 2. The support frames 2 are used for fertilizing crops with tall seedlings, such as cotton, peppers, and tomatoes. The storage tank 1 has an inlet. A handrail 24 is fixedly installed on one side of the storage tank 1. A support leg 25 is fixedly connected to the bottom of the storage tank 1 near the handrail 24. In actual operation, the farmer holds the handrail 24 and lifts the support leg 25 at the bottom of the storage tank 1, similar to the operation of a wheelbarrow on a construction site. A storage chamber is formed inside the storage tank 1, and a working shaft 4 is rotatably mounted inside the storage chamber. Multiple stirring blades 7 are circumferentially connected to the outer periphery of the working shaft 4. A transmission mechanism is provided between the movable wheels 3 and the working shaft 4. When the moving wheel 3 rotates, the transmission mechanism converts the rotation of the moving wheel 3 into the rotation of the working shaft 4 and the stirring blade 7 within the liquid storage chamber. In actual operation, after the farmer pours water and liquid fertilizer into the liquid storage tank 1 in proportion, the liquid fertilizer and water are stirred. When moving the entire device, it is necessary to ensure that the moving wheel 3 rolls in the furrows between the soil ridges to avoid damaging the crops. Farmers can choose to walk on the soil ridges or in the furrows according to the planting density of the crops and the strength of the seedlings. When moving the entire device, the moving wheel 3 rolls on the ground. While the moving wheel 3 is rolling, the transmission mechanism drives the working shaft 4 and the stirring blade 7 to rotate. The stirring blade 7 stirs and mixes the water and liquid fertilizer, making the liquid fertilizer and water more evenly mixed. At the same time, farmers do not need to operate separately, reducing their labor intensity.

[0028] like Figure 1 and Figure 2As shown, a spray pipe 5 connected to the storage chamber is fixedly installed at the bottom of the storage tank 1. Spray holes 6 are opened on both sides of the spray pipe 5. The spray holes 6 are designed to be inclined downwards, so that when the liquid fertilizer is sprayed out, it has a downward movement tendency, thereby allowing the liquid fertilizer to be sprayed onto the root and stem position of the crop or the soil at the root and stem position. A piston plate 8 is slidably installed inside the spray pipe 5. Multiple liquid inlet holes 9 are opened through the piston plate 8. A one-way sealing structure that can block the liquid inlet holes 9 is installed on the piston plate 8. The working shaft 4 is connected to the piston plate 8. A linkage mechanism is provided. When the working shaft 4 rotates, the linkage mechanism converts the rotational motion of the working shaft 4 into the reciprocating sliding motion of the piston plate 8 within the spray pipe 5. The piston plate 8 always reciprocates within the spray pipe 5. The diameter of the piston plate 8 is the same as the inner diameter of the spray pipe 5. When the piston plate 8 slides upward within the spray pipe 5, the one-way sealing structure opens, allowing liquid fertilizer in the storage chamber to enter the spray pipe 5 through the inlet hole 9. When the piston plate 8 slides downward within the spray pipe 5, the one-way sealing structure closes, preventing liquid from entering the spray pipe 5. Fertilizer is squeezed and sprayed out through spray hole 6. As the entire device moves, the moving wheel 3 drives the working shaft 4 to rotate. Simultaneously, the working shaft 4, through a linkage mechanism, drives the piston plate 8 to slide back and forth within the spray pipe 5. When the piston plate 8 moves upward within the spray pipe 5, the one-way sealing structure opens the liquid inlet 9, allowing the diluted liquid fertilizer in the storage chamber to enter the spray pipe 5 through the liquid inlet 9 under water pressure. When the piston plate 8 moves downward within the spray pipe 5, the one-way sealing structure closes the liquid inlet 9, and the spray pipe 5... The gas inside is compressed, causing the diluted liquid fertilizer in the spray pipe 5 to be sprayed out from the spray hole 6 and reach the root and stem of the crop. As the device moves forward, the piston plate 8 reciprocates, spraying the diluted liquid fertilizer in the storage chamber to fertilize the crop. Farmers only need to push the device to complete the liquid fertilizer spraying operation, reducing the labor intensity of farmers and improving work efficiency. At the same time, the entire device does not require electricity to drive it, reducing the size and weight of the entire device, and there is no need to worry about insufficient power.

[0029] Existing backpack-style sprayers require carrying the entire sprayer on your back, then manually cranking the handle with one hand and holding the straight nozzle with the other to spray the liquid fertilizer. Carrying the entire sprayer is physically demanding, especially when lifting it onto your back, which requires straining your waist and can cause back injuries. In addition, backpack-style sprayers also require farmers to thoroughly mix the liquid fertilizer and water beforehand.

[0030] like Figure 2 and Figure 5As shown, the transmission mechanism includes a first bevel gear 10, a second bevel gear 11, a transmission shaft 12, a third bevel gear 13, and a fourth bevel gear 14. The movable wheel 3 is rotatably mounted on the support frame 2 via a rotating shaft. A first transmission groove is formed within the support frame 2. The first bevel gear 10 is fixedly mounted on the rotating shaft of the movable wheel 3. The second bevel gear 11 is located within the first transmission groove and meshes with the first bevel gear 10. The transmission shaft 12 is rotatably mounted within the support frame 2, with one end fixedly connected to the second bevel gear 11. A second transmission groove is also formed within the support frame 2. The third bevel gear 13 is fixedly mounted on the other end of the transmission shaft 12 and is located within the second transmission groove. The fourth bevel gear 14 is located within the second transmission groove. Bevel gear 14 meshes with bevel gear 13, and bevel gear 14 is fixedly connected to the end of working shaft 4. When the entire device is moved, the moving wheel 3 rolls on the ground, and the moving wheel 3 drives its shaft to rotate synchronously. The shaft then drives bevel gear 10 to rotate, which in turn drives bevel gear 11 to rotate. Bevel gear 11 then drives transmission shaft 12 to rotate, which in turn drives bevel gear 13 to rotate. Bevel gear 13 then drives bevel gear 14 to rotate, which in turn drives working shaft 4 and stirring blade 7 to rotate synchronously. The number of teeth on bevel gear 13 is much greater than the number of teeth on bevel gear 14, and similarly, the number of teeth on bevel gear 10 is much greater than the number of teeth on bevel gear 11.

[0031] like Figure 2 and Figure 4 As shown, the linkage mechanism includes an eccentric block 15, an eccentric shaft 16, a connecting rod 17, and a linear rod 18. The middle section of the working shaft 4 located within the liquid storage cavity is disconnected. There are two eccentric blocks 15, which are fixedly installed at the two ends of the disconnected section of the working shaft 4. Both ends of the eccentric shaft 16 are fixedly connected to the two eccentric blocks 15. The eccentric shaft 16 is arranged parallel to the working shaft 4, but their axes do not coincide. One end of the connecting rod 17 is rotatably mounted on the eccentric shaft 16, and the other end of the connecting rod 17 is connected to the linear rod 18. 18 is rotatably connected. The end of the linear rod 18 away from the connecting rod 17 is fixedly connected to the piston plate 8. When the working shaft 4 rotates, it will drive the eccentric block 15 to rotate synchronously. The eccentric block 15 performs circular motion and drives the eccentric shaft 16 to perform circular motion synchronously, so that the connecting rod 17 rotates on the eccentric shaft 16. Since the linear rod 18 and the piston plate 8 are fixedly connected, the piston plate 8 performs reciprocating linear motion, that is, the linear rod 18 can only move linearly. The working principle of the linkage mechanism is similar to that of a crank connecting rod, so the rotation of the working shaft 4 drives the reciprocating motion of the piston plate 8.

[0032] like Figure 2 and Figure 3As shown, a stabilizer 19 is fixedly installed at the opening of the spray pipe 5. The straight rod 18 slides through the stabilizer 19, and the stabilizer 19 maintains the straight trajectory of the straight rod 18, reducing the occurrence of the straight rod 18 being pulled and deflected by the connecting rod 17.

[0033] like Figure 2 As shown, there are multiple stirring blades 7, which are symmetrically arranged on the working shaft 4 about the eccentric shaft 16. When the working shaft 4 drives the stirring blades 7 to rotate, the stirring blades 7 agitate the water and liquid fertilizer in the storage chamber, causing the mixed liquid on both sides of the storage chamber to move towards the middle position of the storage chamber. The mixed liquid on both sides collides and mixes when it moves to the middle position of the storage chamber, so that the mixed liquid does not move in a single direction, resulting in a better mixing effect. In addition, pressure is generated when the mixed liquid on both sides collides with each other, so that the diluted mixed liquid can enter the spray pipe 5 better.

[0034] like Figure 2 , Figure 6 and Figure 7 As shown, the one-way sealing structure includes a sealing plate 20; the bottom of the piston plate 8 is provided with a sealing groove that rotates with the sealing plate 20. The sealing plate 20 is rotatably installed in the sealing groove via a rotating shaft. A torsion spring is fitted on the rotating shaft of the sealing plate 20. The torsion spring can drive the sealing plate 20 to rotate and seal the bottom opening of the liquid inlet 9. Under normal conditions, without the action of external force, the torsion spring can drive the sealing plate 20 to rotate and seal the bottom opening of the liquid inlet 9. In specific use, when the piston plate 8 moves upward, the sealing plate 20 is compressed by the fertilizer and rotates to open (the compressive force includes the hydraulic pressure generated by the liquid level difference, the reaction force of the liquid fertilizer when the piston plate 8 drives the sealing plate 20 to move upward, and the impact force generated by the stirring blade 7 colliding the liquid fertilizer on both sides of the liquid storage chamber towards the middle position of the liquid storage chamber). The stirring blade 7 drives the liquid fertilizer to move towards the middle position, which also allows more liquid fertilizer to enter the spray pipe 5.

[0035] In practice, as the amount of liquid fertilizer in the storage chamber decreases, the force on the sealing plate 20 decreases, which may cause the sealing plate 20 to fail to open, preventing the liquid fertilizer in the storage chamber from entering the spray pipe 5 and causing unnecessary waste. Therefore, the following design is proposed.

[0036] like Figure 2 , Figure 6 and Figure 8As shown, an adjusting structure capable of sealing the spray hole 6 is installed inside the spray pipe 5. When the piston plate 8 moves upward inside the spray pipe 5, the adjusting structure can seal the spray hole 6. When the piston plate 8 moves downward inside the spray pipe 5, the adjusting structure can open the spray hole 6. The adjusting structure includes an adjusting plug 21, a limiting rod 22, and a return spring 23. The adjusting plug 21 is slidably installed inside the spray pipe 5, and the diameter of the adjusting plug 21 is the same as the inner diameter of the spray pipe 5. The limiting rod 22 is fixedly installed inside the adjusting plug 21. The bottom end of the stopper 21 and the sliding end of the limiting rod 22 pass through the bottom end of the spray pipe 5. The return spring 23 is fitted on the limiting rod 22, and the two ends of the return spring 23 are fixedly connected to the bottom end of the adjusting stopper 21 and the bottom inner wall of the spray pipe 5, respectively. A round block is fixedly connected to the bottom of the limiting rod 22. The round block can abut against the bottom end of the spray pipe 5, thereby limiting the rising height of the limiting rod 22 and the adjusting stopper 21. The adjusting stopper 21 can cover the spray hole 6. In actual operation, when the piston plate 8 moves upward, The gas and liquid fertilizer inside the spray pipe 5 are not compressed. Under the rebound action of the return spring 23, the adjusting plug 21 is pushed upward in the spray pipe 5 until the spray hole 6 is blocked. The air pressure outside the spray pipe 5 cannot drive the adjusting plug 21 to move vertically in the spray pipe 5. At this time, the piston plate 8 continues to move upward, the space inside the spray pipe 5 increases, and the amount of gas and liquid remains unchanged, thus forming a negative pressure. Even when the amount of liquid fertilizer in the storage chamber is very small, the negative pressure can drive the sealing plate 20 to rotate and open the liquid inlet 9, thereby ensuring that a small amount of liquid fertilizer can also enter the spray pipe 5. The generated negative pressure may also suck the liquid fertilizer at the bottom into the spray pipe 5. After the liquid fertilizer is sucked in, the piston plate 8 moves downward, compressing the space inside the spray pipe 5. Under compression, the adjusting plug 21 moves downward and compresses the return spring 23. The adjusting plug 21 opens the spray hole 6, and the liquid fertilizer is sprayed out from the spray hole 6 to complete the fertilization operation, thereby reducing the amount of liquid fertilizer left over and causing unnecessary waste.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A liquid fertilizer application device for agricultural production, characterized in that, Includes a liquid storage tank (1), on both sides of the liquid storage tank (1) are fixedly installed support frames (2), and on each of the two support frames (2) are rotatably installed moving wheels (3). The liquid storage tank (1) has a liquid storage cavity, and a working shaft (4) is rotatably installed in the liquid storage cavity. Multiple stirring blades (7) are circumferentially connected to the outer periphery of the working shaft (4). A transmission mechanism is provided between the moving wheels (3) and the working shaft (4). When the moving wheels (3) rotate, the transmission mechanism can convert the rotation of the moving wheels (3) into the rotation of the working shaft (4) and the stirring blades (7) in the liquid storage cavity. A spray pipe (5) communicating with the storage chamber is fixedly installed at the bottom of the liquid storage tank (1). Spray holes (6) are opened on both sides of the spray pipe (5). A piston plate (8) is slidably installed inside the spray pipe (5). Multiple liquid inlet holes (9) are opened through the piston plate (8). A one-way sealing structure capable of sealing the liquid inlet holes (9) is installed on the piston plate (8). A linkage mechanism is provided between the working shaft (4) and the piston plate (8). When the working shaft (4) rotates... When in motion, the linkage mechanism can convert the rotation of the working shaft (4) into the reciprocating sliding of the piston plate (8) in the spray pipe (5). When the piston plate (8) slides upward in the spray pipe (5), the one-way sealing structure opens, and the liquid fertilizer in the storage chamber can enter the spray pipe (5) through the liquid inlet (9). When the piston plate (8) slides downward in the spray pipe (5), the one-way sealing structure closes, and the liquid fertilizer in the spray pipe (5) is squeezed out through the spray hole (6). The linkage mechanism includes an eccentric block (15), an eccentric shaft (16), a connecting rod (17), and a linear rod (18); the middle section of the working shaft (4) located in the liquid storage chamber is in a disconnected state; there are two eccentric blocks (15), which are respectively fixedly installed at the two ends of the disconnected working shaft (4); the two ends of the eccentric shaft (16) are respectively fixedly connected to the two eccentric blocks (15); the eccentric shaft (16) is arranged parallel to the working shaft (4); the axis of the eccentric shaft (16) and the working shaft (4) do not coincide; one end of the connecting rod (17) is rotatably fitted on the eccentric shaft (16); the other end of the connecting rod (17) is rotatably connected to the linear rod (18); the end of the linear rod (18) away from the connecting rod (17) is fixedly connected to the piston plate (8); The number of stirring blades (7) is multiple, and the multiple stirring blades (7) are symmetrically arranged on the working shaft (4) about the eccentric shaft (16); The one-way sealing structure includes a sealing plate (20); the bottom of the piston plate (8) is provided with a sealing groove that rotates with the sealing plate (20), the sealing plate (20) is rotatably installed in the sealing groove by a rotating shaft, and a torsion spring is fitted on the rotating shaft of the sealing plate (20). The torsion spring can drive the sealing plate (20) to rotate and seal the bottom opening of the liquid inlet (9); The spray pipe (5) is equipped with an adjustment structure that can block the spray hole (6). When the piston plate (8) moves upward in the spray pipe (5), the adjustment structure can block the spray hole (6). When the piston plate (8) moves downward in the spray pipe (5), the adjustment structure can open the spray hole (6). The adjustment structure includes an adjustment plug (21), a limiting rod (22), and a return spring (23); the adjustment plug (21) is slidably installed inside the spray pipe (5), the limiting rod (22) is fixedly installed at the bottom end of the adjustment plug (21), the limiting rod (22) slides through the bottom end of the spray pipe (5), the return spring (23) is fitted on the limiting rod (22), and the two ends of the return spring (23) are fixedly connected to the bottom end of the adjustment plug (21) and the bottom inner wall of the spray pipe (5), respectively. The adjusting plug (21) can cover the spray hole (6).

2. The liquid fertilizer application apparatus for agricultural production according to claim 1, characterized in that, The transmission mechanism includes a first bevel gear (10), a second bevel gear (11), a transmission shaft (12), a third bevel gear (13), and a fourth bevel gear (14); the movable wheel (3) is rotatably mounted on the support frame (2) via a rotating shaft, and a first transmission groove is opened in the support frame (2). The first bevel gear (10) is fixedly mounted on the rotating shaft of the movable wheel (3), and the second bevel gear (11) is located in the first transmission groove and meshes with the first bevel gear (10). The transmission shaft (12) The drive shaft (12) is rotatably installed in the support frame (2). One end of the drive shaft (12) is fixedly connected to the second bevel gear (11). The support frame (2) also has a second transmission groove. The third bevel gear (13) is fixedly installed in the other end of the drive shaft (12). The third bevel gear (13) is located in the second transmission groove. The fourth bevel gear (14) is located in the second transmission groove. The fourth bevel gear (14) meshes with the third bevel gear (13), and the fourth bevel gear (14) is fixedly connected to the end of the working shaft (4).

3. The liquid fertilizer application apparatus for agricultural production according to claim 2, characterized in that, A stabilizer (19) is fixedly installed at the opening of the spray pipe (5), and the straight rod (18) slides through the stabilizer (19).

4. The liquid fertilizer application device for agricultural production according to claim 1, characterized in that, The liquid storage tank (1) is equipped with a feed inlet; a handrail (24) is fixedly installed on one side of the liquid storage tank (1); a support leg (25) is fixedly connected to the bottom of the side of the liquid storage tank (1) near the handrail (24).

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