Pluggable water and fertilizer drip irrigation device, transmission mechanism and tumbril

Abstract

A plug-pull type water and fertilizer drip irrigation device, a transmission mechanism and a tumbrel belong to fertilization equipment in the field of agricultural machinery, a sealing rubber plug is arranged in a water and fertilizer operation cylinder, the sealing rubber plug is driven by a slider-crank mechanism to lift, a limiting block is arranged on the outer side of the water and fertilizer operation cylinder, and upper and lower limiting plates are arranged above and below the limiting block; in the lifting process of the sealing rubber plug, the water and fertilizer operation barrel is driven to synchronously lift by virtue of friction force until the sealing rubber plug touches the upper and lower limiting plates, and the sealing rubber plug overcomes the friction force to generate relative displacement with the water and fertilizer operation barrel to suck water and fertilizer mixed liquid into the closed cavity or push and extrude the water and fertilizer mixed liquid in the closed cavity. Fertilizer and water are mixed and then directly injected below the surface layer of soil in a drip irrigation mode, drip irrigation operation is synchronously completed during fertilization, the utilization rate of water and fertilizer is increased, a large amount of irrigation water is saved due to the fact that the fertilizer and water are directly injected below the soil, and the drip irrigation device is suitable for topdressing operation in the earlier stage of hole sowing crops.

Description

Technical Field

[0001] This invention relates to fertilizer application equipment in the field of agricultural machinery, specifically a plug-in water and fertilizer drip irrigation device, a transmission mechanism, and a fertilizer application vehicle. Background Technology

[0002] There are generally two main types of fertilization equipment used in agriculture. One is the direct spreading type, which applies fertilizer directly to the soil around the crop roots. The problem with this type is that factors such as volatilization and water solubility result in low fertilizer utilization. To address this issue, another type of fertilization equipment has been developed: the soil covering fertilization equipment. The core of this type of equipment lies in digging and covering the soil. The digging equipment at the front digs trenches in the field, the guide pipe in the middle applies fertilizer into the trenches, and the covering wheel at the rear covers the trenches with soil, thus covering the fertilizer within the trenches and completing the soil covering fertilization process.

[0003] However, existing soil-covering fertilization equipment, due to its continuous fertilization, has a good fertilization effect on crops such as wheat and grains that are sown in rows. However, for crops such as beans, peanuts, and corn, which are sown in holes with a certain distance between adjacent plants, using this type of continuous soil-covering fertilization equipment will lead to over-fertilization, which will not only waste fertilizer but also aggravate soil eutrophication and compaction.

[0004] In November 2024, the applicant applied for a single-power linkage soil drilling and fertilization structure and fertilization vehicle for spot fertilization of hole-sown crops. However, during use, it was found that the equipment has a good fertilization effect on granular fertilizers, such as urea and granular compound fertilizers. The reason is that these granular fertilizers are not easy to clump or stick to the inside of the fertilization leg for other reasons. However, for loose powder fertilizers, due to clumping and other reasons, they are not only easy to block the fertilization channel, but also leave a large amount of fertilizer inside the fertilization leg. After each use, the fertilization leg needs to be disassembled for cleaning. Summary of the Invention

[0005] The purpose of this invention is to provide a plug-in water and fertilizer drip irrigation device, a transmission mechanism, and a fertilizer applicator. After mixing fertilizer with water, the fertilizer is directly injected into the soil below the surface layer via drip irrigation. This not only completes the drip irrigation operation simultaneously with fertilization, but also improves the utilization rate of water and fertilizer and saves a lot of irrigation water because the fertilizer is directly injected into the soil. This invention is suitable for topdressing operations in the early stage of hole-sown crops.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned technical objectives is as follows: a pluggable water and fertilizer drip irrigation device, comprising a water and fertilizer working cylinder with openings at both ends, wherein the bottom opening of the water and fertilizer working cylinder is closed by a sealing plate connected by a torsion spring, a sealing rubber plug is provided inside the water and fertilizer working cylinder, and the top of the sealing rubber plug is driven to rise and fall by a crank-slider mechanism, forming a closed cavity between the sealing rubber plug and the sealing plate, a limit block is provided on the outside of the water and fertilizer working cylinder, and an upper limit plate and a lower limit plate are respectively provided above and below the limit block, the sealing rubber plug is frictionally connected to the inner wall of the water and fertilizer working cylinder, and during the process of the crank-slider mechanism driving the sealing rubber plug to rise and fall, the sealing rubber plug drives the water and fertilizer working cylinder to rise and fall synchronously by friction until the limit block touches the upper limit plate or the lower limit plate, the sealing rubber plug overcomes the friction and undergoes relative displacement with the water and fertilizer working cylinder, drawing water and fertilizer mixture into the closed cavity, or pushing the water and fertilizer mixture in the closed cavity, so that it overcomes the torsion of the torsion spring and pushes the sealing plate to flip and discharge from the bottom opening of the water and fertilizer working cylinder.

[0007] As an optimized solution of the above-mentioned plug-in water and fertilizer drip irrigation device, the sealing rubber plug drives the water and fertilizer operation cylinder to rise and fall synchronously by friction. When it rises to the highest point, the bottom of the water and fertilizer operation cylinder is above the soil surface. When it falls to the lowest point, the bottom of the water and fertilizer operation cylinder is inserted into the soil.

[0008] As another optimized solution for the above-mentioned plug-in water and fertilizer drip irrigation device, the bottom of the water and fertilizer working cylinder is provided with a conical working head. The conical working head has a conical tip that can be inserted into the soil, and a water injection channel is opened on the conical tip that communicates with the bottom opening of the water and fertilizer working cylinder.

[0009] As another optimized solution for the above-mentioned plug-in water and fertilizer drip irrigation device, a transfer water tank is provided around the water and fertilizer operation cylinder, and the water inlet pipe on the transfer water tank is connected to the water and fertilizer chamber through the water inlet hose. The bottom of the transfer water tank is connected to the inside of the water and fertilizer operation cylinder through at least one water suction hole, so that when the sealing rubber plug moves upward and overcomes the frictional force to make relative displacement with the water and fertilizer operation cylinder, the water and fertilizer mixture in the transfer water tank is drawn into the water and fertilizer operation cylinder through the water suction hole.

[0010] As another optimized solution for the above-mentioned plug-in water and fertilizer drip irrigation device, the water suction hole is a variable diameter hole, and the diameter of the end away from the transfer water tank is larger than that of the other end, so as to form a clamping platform facing into the water and fertilizer operation cylinder. A thin metal plate is rotatably set on the clamping platform, and the thin metal plate seals the water suction hole by means of a magnet.

[0011] As another optimized solution for the above-mentioned plug-in water and fertilizer drip irrigation device, when the sealing rubber plug and the water and fertilizer working cylinder begin to move relative to each other and the sealing rubber plug is facing upwards alone, the water suction hole is flush with the bottom of the sealing rubber plug; when the sealing rubber plug is at the lowest position inside the water and fertilizer working cylinder, the water suction hole is blocked by the sealing rubber plug.

[0012] As another optimized solution for the above-mentioned plug-in water and fertilizer drip irrigation device, a support is provided on the outside of the water and fertilizer operation cylinder, the upper limit plate and the lower limit plate are fixedly connected to the support, a guide rail is provided on the support along the vertical direction, and the outer wall of the water and fertilizer operation cylinder slides with the guide rail through a guide connecting plate.

[0013] As another optimized solution for the aforementioned plug-in type drip irrigation device, the upper surface of the sealing rubber plug is hinged to the crank-slider mechanism via a connector. A self-release buckle is provided above the sealing rubber plug. When the sealing rubber plug rises to its highest point, it is engaged in the self-release buckle. During the descent of the sealing rubber plug, the limiting block cooperates with the lower limiting plate to disengage the connector from the self-release buckle. The self-release buckle includes at least three arc-shaped plates evenly arranged around the inner wall of the water and fertilizer operation cylinder. These arc-shaped plates form a deformation channel. The internal width of the deformation channel first decreases and then increases from bottom to top, and the minimum width of the deformation channel is less than the width of the connector. A deformation space with a bottom opening is formed between the arc-shaped plates and the inner wall of the water and fertilizer operation cylinder. A compression spring supporting the arc-shaped plates is provided in the deformation space.

[0014] A transmission mechanism includes a crank drive shaft, a travel shaft, and a power shaft driven by a power source. The power shaft is equipped with a first transmission wheel and a second transmission wheel. The first transmission wheel engages with a first meshing wheel on the crank drive shaft to transmit power to the crank drive shaft, which in turn drives the crank-slider mechanism in the aforementioned plug-in drip irrigation device. The rim of the second transmission wheel consists of a protruding meshing portion and a non-meshing portion. The protruding meshing portion engages with the second meshing wheel on the travel shaft to transmit power, enabling the travel shaft to output intermittent power to the travel power output end. Furthermore, the length of the protruding meshing portion allows the rotation period of the second meshing wheel to correspond to the period during which the water-fertilizer mixture is drawn into the closed cavity of the plug-in drip irrigation device.

[0015] A fertilizer applicator includes a water-fertilizer mixing chamber for mixing and temporarily storing water and fertilizer, and wheels for driving the fertilizer applicator in the field. The wheels of the fertilizer applicator are powered by the driving power output end of the aforementioned transmission mechanism, and the fertilizer applicator is equipped with the aforementioned plug-in water-fertilizer drip irrigation device.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1) This invention mixes fertilizer with water and injects it directly into the soil below the surface through drip irrigation. This not only completes the drip irrigation operation simultaneously with fertilization, but also improves the utilization rate of water and fertilizer and saves a lot of irrigation water because it is injected directly into the soil. This invention is suitable for topdressing operations in the early stage of hole-sown crops. 2) The water-fertilizer operation cylinder of this invention is equipped with a sealing rubber plug that is driven to reciprocate up and down by a crank-slider mechanism. The friction between the sealing rubber plug and the inner wall of the water-fertilizer operation cylinder causes them to rise and fall synchronously. Then, a limiting block, an upper limiting plate, and a lower limiting plate are installed outside the water-fertilizer operation cylinder. The coordinated action of the limiting block and the upper and lower limiting plates divides the rising and falling strokes of both the water-fertilizer operation cylinder and the sealing rubber plug into two parts. That is, the rising process is divided into two parts: one part is the synchronous rise of the water-fertilizer operation cylinder and the sealing rubber plug; the other part is the water-fertilizer operation cylinder being restricted by the upper limiting plate, while the sealing rubber plug rises alone, creating a negative pressure inside the water-fertilizer operation cylinder and drawing in water. The fertilizer mixture enters the water and fertilizer operation cylinder; the descent process is also divided into two parts. In one part, the water and fertilizer operation cylinder and the sealing rubber plug descend simultaneously. In the other part, the water and fertilizer operation cylinder is restricted by the lower limit plate, and the sealing rubber plug descends alone, forming a pushing force in the water and fertilizer operation cylinder, pushing the pumped water and fertilizer mixture out of the water and fertilizer operation cylinder. By utilizing the synergistic cooperation of the limit block, the upper and lower limit plates and the sealing rubber plug, the entire rotation cycle of the crank slider is divided into four parts, realizing the injection of water and fertilizer mixture after insertion into the soil and the pumping of water and fertilizer mixture after extraction from the soil, thereby improving the utilization rate of water and fertilizer and saving a lot of irrigation water. 3) Since the insertion into the soil requires overcoming the resistance of the soil, in order to increase the bonding force between the water and fertilizer operation cylinder and the sealing rubber plug when it is inserted into the soil, a self-release buckle is set inside the water and fertilizer operation cylinder. The self-release buckle uses an arc plate to form a deformation channel that matches the top connector of the sealing rubber plug, and a compression spring is used to maintain the clamping force on the connector. This self-release buckle design can effectively assist the water and fertilizer operation cylinder in the action of being inserted into the soil. 4) The transmission mechanism of the present invention can output intermittent power to the walking wheels, control the fertilizer applicator to move intermittently, and cooperate with the plug-in water and fertilizer drip irrigation device to realize that when the water and fertilizer operation cylinder is inserted into the soil for fertilization, the walking wheels stop, and when the water and fertilizer operation cylinder is pulled out, the walking wheels move forward. It is fully applicable to topdressing of hole-sown crops, and can also be applied to spot fertilization of row-sown crops such as wheat and millet. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the water and fertilizer operation cylinder; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a structural diagram of the self-release buckle and connector; Figure 5 This is a schematic diagram showing the state of the water and fertilizer injection tube after it has been inserted into the soil and the liquid has been injected. Figure 6A schematic diagram showing the process of the water and fertilizer extraction cylinder being pulled out of the soil and starting to extract the water and fertilizer mixture. Figure 7 This is a schematic diagram showing the state of the water and fertilizer application cylinder after it has finished absorbing liquid and is beginning to be inserted downwards into the soil. Figure 8 A schematic diagram showing the water and fertilizer injection tube being inserted into the soil and the water and fertilizer mixture being injected into the soil. Figure 9 This is a schematic diagram showing the state of the water and fertilizer injection tube after it has been inserted into the soil and the liquid has been injected. Figure 10 This is a schematic diagram of the transmission mechanism of the present invention; Attached Figure Descriptions: 1. Support frame; 101. Upper limit plate; 102. Lower limit plate; 103. Guide rail; 2. Sealing rubber plug; 201. Connector; 202. Middle protrusion; 203. Inclined slope; 3. Water and fertilizer operation cylinder; 301. Enclosed cavity; 302. Sealing plate; 303. Limiting block; 304. Guide connecting plate; 305. Water suction hole; 306. Mounting platform; 307. Thin metal plate; 308. Transfer water tank; 309. Water inlet pipe; 3010. Guide plate; 4. Conical operation head; 401. Conical tip; 402. 5. Water injection channel, 501. Crank-slider mechanism, 502. Connecting rod, 503. Crank drive shaft, 504. First meshing wheel, 6. Self-release buckle, 601. Arc plate, 602. Deformation channel, 603. Compression spring, 604. Deformation space, 605. Outwardly expanding arc-shaped part, 606. Clamping part, 7. Power shaft, 701. First drive wheel, 702. Second drive wheel, 7021. Protruding meshing part, 7022. Non-meshing part, 8. Traveling shaft, 801. Second meshing wheel, 802. Traveling power output end, 9. Slewing bearing seat. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Parts not explained in the following embodiments of the present invention are all considered to be prior art known or should be known by those skilled in the art.

[0019] A plug-in drip irrigation device, such as Figure 1 and Figure 2As shown, the water and fertilizer operation cylinder 3 includes openings at both ends. The water and fertilizer operation cylinder 3 is a thin-walled metal cylindrical structure with openings at both ends and a conical bottom. The bottom opening of the water and fertilizer operation cylinder 3 is sealed by a sealing plate 302 connected to a torsion spring. The torsion spring is fixed to the sealing plate 302, and the torsion force of the torsion spring keeps the sealing plate 302 in a horizontal state, thus sealing the bottom opening. In practice, the torsion force of the torsion spring needs to be considered. The selected torsion spring should not have excessive torsion, which would prevent it from opening under water pressure. A torsion spring capable of withstanding a certain amount of water pressure inside the water and fertilizer operation cylinder 3 without tipping over should be selected. This allows it to tip over and open when additional pressure is applied. A sealing rubber plug 2 is installed inside the water and fertilizer operation cylinder 3. The sealing rubber plug 2 has a certain length and is attached to the inner wall of the water and fertilizer operation cylinder 3. The sealing rubber plug 2 is in a state similar to an interference fit, thus maintaining a certain pressure contact with the inner wall of the water and fertilizer operation cylinder 3. The top of the sealing rubber plug 2 is raised and lowered by a crank-slider mechanism 5. At this time, due to the certain contact pressure between the sealing rubber plug 2 and the inner wall of the water and fertilizer operation cylinder 3, the water and fertilizer operation cylinder 3 can be raised and lowered synchronously. The crank-slider mechanism 5 adopts a standard crank-slider mechanism, including a turntable that rotates continuously driven by a rotating shaft. A protruding rotating pin is set near the edge of the turntable surface. This rotating pin is rotatably connected to one end of a connecting rod 501, and the other end of the connecting rod 501 is hinged to the center of the upper surface of the sealing rubber plug 2. The stroke of the crank-slider mechanism 5 determines the stroke of the water and fertilizer operation cylinder 3, i.e., the depth of insertion into the soil and the depth of extraction from the soil. The height of the soil behind forms a closed cavity 301 between the sealing rubber plug 2 and the sealing plate 302. A limiting block 303 is provided on the outer side of the water-fertilizer operation cylinder 3. The limiting block 303 is generally an annular plate fixed to the middle of the outer wall of the water-fertilizer operation cylinder 3. An upper limiting plate 101 and a lower limiting plate 102 are respectively provided above and below the limiting block 303. The upper limiting plate 101 and the lower limiting plate 102 are also annular plate-shaped pieces surrounding the outer side of the water-fertilizer operation cylinder 3, and there is a certain gap between their inner rings and the outer wall of the water-fertilizer operation cylinder 3. The width of the gap is less than the length of the limiting block 303 protruding from the outer wall of the water-fertilizer operation cylinder 3 to ensure that they can contact each other. The sealing rubber plug 2 is frictionally connected to the inner wall of the water-fertilizer operation cylinder 3, and the crank-slider mechanism 5... During the lifting and lowering process of the connecting rod 501 driving the sealing rubber plug 2, the sealing rubber plug 2 relies on friction to drive the water and fertilizer operation cylinder 3 to lift and lower synchronously. That is, before touching the upper limit plate 101 or the lower limit plate 102, the sealing rubber plug 2 relies on its tight connection with the inner wall of the water and fertilizer operation cylinder 3 to overcome the gravity of the water and fertilizer operation cylinder 3 and maintain the synchronous rise and fall of the two until the limiting block 303 on its outer wall touches the upper limit plate 101 or the lower limit plate 102. At this time, since the movement of the water and fertilizer operation cylinder 3 is blocked, the sealing rubber plug 2 is still subjected to an upward or downward force by the crank-slider mechanism 5. At this time, the sealing rubber plug 2 overcomes the friction and undergoes relative displacement with the water and fertilizer operation cylinder 3, that is, the sealing rubber plug 2 continues to move upward or downward.Meanwhile, the water and fertilizer operation cylinder 3 remains in its original position, and a relative displacement occurs between the two. When the sealing rubber plug 2 continues to move upward, the water and fertilizer mixture is drawn into the closed cavity 301. This process is called the liquid extraction process. Alternatively, when the sealing rubber plug 2 continues to move downward, it pushes the water and fertilizer mixture in the closed cavity 301, causing it to overcome the torsion force of the torsion spring and thus push the sealing plate 302 to flip over and be discharged from the bottom opening of the water and fertilizer operation cylinder 3. This process is called the liquid injection process or the fertilization process. In this embodiment, the sealing rubber plug 2 drives the water and fertilizer operation cylinder 3 to rise and fall synchronously by relying on friction. When it rises to the highest point, the bottom of the water and fertilizer operation cylinder 3 is above the soil surface. When it falls to the lowest point, the bottom of the water and fertilizer operation cylinder 3 is inserted into the soil. That is to say, during the reciprocating motion of the sealing rubber plug 2 between the highest and lowest points, the bottom of the water and fertilizer operation cylinder 3 can move back and forth between the soil and the soil surface, thereby realizing the process of inserting and pulling out the water and fertilizer operation cylinder 3 into the soil.

[0020] like Figure 5-9 The diagram shows a complete running cycle of this embodiment: Figure 5 This is a schematic diagram of the state after the water and fertilizer operation cylinder 3 is inserted into the soil (the horizontal line in the figure represents the soil) and the liquid injection is completed. At this time, the sealing rubber plug 2 is at the lowest position inside the water and fertilizer operation cylinder 3. The limiting block 303 is blocked by the lower limiting plate 102, which causes the water and fertilizer operation cylinder 3 to also be at the lowest position, that is, inserted into the soil. After that, the crank slider mechanism 5 starts to drive the sealing rubber plug 2 to move upward. Because the sealing rubber plug 2 is tightly connected to the water and fertilizer operation cylinder 3, the friction force drives the water and fertilizer operation cylinder 3 to rise synchronously and gradually begin to be pulled out of the soil. Figure 6 This is a schematic diagram of the state when the water and fertilizer operation cylinder 3 is pulled out of the soil and begins to extract the water and fertilizer mixture. At this time, the upward stroke of the crank slider mechanism 5 is exactly halfway, and the bottom of the water and fertilizer operation cylinder 3 is already above the soil surface. The limit block 303 is blocked by the upper limit plate 101, causing the water and fertilizer operation cylinder 3 to stop rising at the highest position and remain stationary. Since the crank slider mechanism 5 is still in the upward stroke, the sealing rubber plug 2 overcomes the friction and begins to rise independently, generating negative pressure in the water and fertilizer operation cylinder 3, creating the conditions for extracting the water and fertilizer mixture. Figure 7This is a schematic diagram showing the state of the water and fertilizer operation cylinder 3 after the liquid has been absorbed and it has begun to be inserted into the soil. At this time, the upward stroke of the crank-slider mechanism 5 is completed and it is about to enter the downward stroke. The bottom of the water and fertilizer operation cylinder 3 is still above the soil surface. As the crank-slider mechanism 5 begins to control the sealing rubber plug 2 to descend, due to the existence of friction, the sealing rubber plug 2 drives the water and fertilizer operation cylinder 3 to descend synchronously and gradually insert into the soil. At this time, since there is no relative displacement between the sealing rubber plug 2 and the water and fertilizer operation cylinder 3, the water and fertilizer mixture stored in the water and fertilizer operation cylinder 3 will not change. Figure 8 This is a schematic diagram of the state in which the water and fertilizer operation cylinder 3 is inserted into the soil and begins to inject water and fertilizer mixture into the soil. At this time, the downward stroke of the crank slider mechanism 5 is exactly halfway, the bottom of the water and fertilizer operation cylinder 3 has been inserted into the soil, the limit block 303 is blocked by the lower limit plate 102, causing the water and fertilizer operation cylinder 3 to stop descending at the lowest position and remain stationary. Since the crank slider mechanism 5 is still in the downward stroke, the sealing rubber plug 2 overcomes the friction and begins to descend independently, generating a pushing force in the water and fertilizer operation cylinder 3, creating conditions for injecting water and fertilizer mixture into the soil. Figure 9 This is a schematic diagram showing the state of the water and fertilizer injection cylinder 3 after it has been inserted into the soil and the liquid has been injected. At this point, its state is similar to... Figure 5 Similarly, the sealing rubber plug 2 is at the lowest position inside the water and fertilizer operation cylinder 3, and the limiting block 303 is blocked by the lower limiting plate 102, causing the water and fertilizer operation cylinder 3 to also be at the lowest position, and the action of injecting water and fertilizer mixture into the soil has been completed. cycle Figures 5-9 The action keeps the water and fertilizer operation cylinder 3 in a cycle of being inserted into the soil and statically injecting water and fertilizer mixture, and then being pulled out of the soil and statically pumping in water and fertilizer mixture.

[0021] The above are the basic embodiments of the present invention. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments: This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the difference lies in: Figure 1 As shown, the bottom of the water and fertilizer operation cylinder 3 is provided with a conical operation head 4. The conical operation head 4 is for protecting the sealing plate 302 and for facilitating better insertion into the soil. The conical operation head 4 has a conical tip 401 that can be inserted into the soil. That is, the conical operation head 4 has an upper cylindrical section and a lower conical tip 401. The cylindrical section has internal threads that can engage with the external threads at the bottom of the water and fertilizer operation cylinder 3 to achieve a detachable connection between the two. A water injection channel 402 is opened on the conical tip 401 that communicates with the opening at the bottom of the water and fertilizer operation cylinder 3. By setting the conical operation head 4, the sealing plate 302 and the torsion spring are placed in the internal space of the conical operation head 4, preventing the soil from blocking the opening of the sealing plate 302.

[0022] This embodiment is an improved version based on embodiment 1. Its main structure is the same as that of embodiment 1, but the difference lies in: Figure 2 and Figure 3 As shown, a transfer water tank 308 is provided on the outer side of the upper region of the water-fertilizer operation cylinder 3. The transfer water tank 308 is a thin-walled annular structure with a hollow interior. The inner ring is welded and fixed to the outer wall of the water-fertilizer operation cylinder 3. One side has an inlet pipe 309 for injecting water-fertilizer mixture into it. Alternatively, it can be designed with a cross-section in the shape of "[". This structure, together with the outer wall of the water-fertilizer operation cylinder 3, forms an annular hollow structure. The inlet pipe 309 on the transfer water tank 308 is connected to the water-fertilizer chamber through an inlet hose. Since the water-fertilizer operation cylinder 3 is in motion, therefore, a transfer water tank 308 is used. The inlet hose is connected to the water-fertilizer tank, without affecting the lifting and lowering of the water-fertilizer operation cylinder 3 and the transfer water tank 308. The bottom of the transfer water tank 308 is connected to the inside of the water-fertilizer operation cylinder 3 through at least one suction hole 305. The suction hole 305 is a through hole that penetrates the side wall of the water-fertilizer operation cylinder 3 and connects to the inside of the transfer water tank 308. The number of suction holes is generally 2-4, arranged around the water-fertilizer operation cylinder 3, so that when the sealing rubber plug 2 moves upward and overcomes friction to make relative displacement with the water-fertilizer operation cylinder 3, the water-fertilizer mixture in the transfer water tank 308 is drawn into the water-fertilizer operation cylinder 3 through the suction hole 305. In order to ensure the stability of the lifting and lowering of the transfer water tank 308, a guide plate 3010 is provided on the outer side wall of the transfer water tank 308. There are at least two guide plates 3010, which are evenly distributed along the side wall. The guide plates 3010 are also slidably engaged with the guide rail 103 on the bracket 1. like Figure 3 As shown, the water suction hole 305 is a variable diameter hole, and the diameter of the end away from the transfer water tank 308 is larger than that of the other end. That is to say, the water suction hole 305 is two-sectioned, with the inner diameter of the section closer to the transfer water tank 308 being smaller and the inner diameter of the section closer to the water and fertilizer operation cylinder 3 being larger, so as to form a mounting platform 306 facing into the water and fertilizer operation cylinder 3. A thin metal plate 307 is rotatably mounted on the mounting platform 306. One end of the thin metal plate 307 is rotatably mounted by a pin and is in a vertical state. A small magnet is mounted on the side of the mounting platform 306 away from the pin. The metal plate 307 seals the water absorption hole 305 with the help of a magnet. The magnet attracts the metal plate 307 to the mounting plate 306, thereby sealing the water absorption hole 305. With this structure, when the sealing rubber plug 2 rises inside the water and fertilizer operation cylinder 3, creating a suction effect, the metal plate 307 flips to open the water absorption hole 305; when the sealing rubber plug 2 falls inside the water and fertilizer operation cylinder 3, creating a pushing effect, the metal plate 307 flips to completely seal the water absorption hole 305, so that the water and fertilizer mixture can only be injected into the soil after pushing open the sealing plate 302. like Figure 3As shown, when the sealing rubber plug 2 and the water-fertilizer operation cylinder 3 begin to move relative to each other and the sealing rubber plug 2 moves upward alone, the position of the water suction hole 305 is flush with the bottom of the sealing rubber plug 2. This position setting can ensure that half of the upward process of the sealing rubber plug 2 is to draw water-fertilizer mixture; when the sealing rubber plug 2 is at the lowest position in the water-fertilizer operation cylinder 3, the water suction hole 305 is blocked by the sealing rubber plug 2.

[0023] This embodiment is an improved version based on embodiment 1. Its main structure is the same as that of embodiment 1, but the difference lies in: Figure 1 As shown, a support 1 is provided on the outside of the water and fertilizer operation cylinder 3. The support 1 is used for fixed connection with the body of the fertilizer application vehicle. Its structure consists of multiple metal plates or other material plates arranged around the water and fertilizer operation cylinder 3. The upper limit plate 101 and the lower limit plate 102 are fixedly connected to the support 1, forming a support and fixation for the upper limit plate 101 and the lower limit plate 102. A guide rail 103 is provided on the support 1 in the vertical direction. The guide rail 103 can be a track or track groove protruding from the surface of the support 1, or it can be a groove recessed into the surface of the support 1. The vertical groove is provided, and the outer wall of the water and fertilizer operation cylinder 3 is slidably engaged with the guide rail 103 through the guide connecting plate 304. The number of guide rails 103 is generally 2-4, and they are evenly distributed around the water and fertilizer operation cylinder 3. The guide connecting plate 304 corresponds one-to-one with the guide rail 103. A slider can generally be set at the end of the guide connecting plate 304. Through the slider and the guide rail 103 sliding engagement, the setting of these guide rails 103 and guide connecting plates 304 can make the water and fertilizer operation cylinder 3 remain stable during the lifting and lowering process.

[0024] This embodiment is an improved version based on embodiment 1. Its main structure is the same as that of embodiment 1, but the difference lies in: Figure 4As shown, the upper surface of the sealing rubber plug 2 is hinged to the connecting rod 501 of the crank-slider mechanism 5 via the connector 201. A self-release buckle 6 is provided on the inner wall of the water-fertilizer operating cylinder 3 above the sealing rubber plug 2. When the sealing rubber plug 2 rises to its highest point, it engages with the self-release buckle 6. During the descent of the sealing rubber plug 2, the limiting block 303 cooperates with the lower limiting plate 102, causing the connector 201 to disengage from the self-release buckle 6. The self-release buckle 6 enhances the bonding force between the sealing rubber plug 2 and the water-fertilizer operating cylinder 3, making it easier to insert into the soil. The self-release buckle 6 includes a ring around the water-fertilizer operating cylinder. At least three arc-shaped plates 601 are evenly arranged on the inner wall of the cylinder 3, and the number is generally 3-6. These arc-shaped plates 601 surround a deformation channel 602. The internal width of the deformation channel 602 first decreases and then increases from bottom to top, and the minimum width of the deformation channel 602 is less than the width of the connector 201, so that the connector 201 can squeeze into the deformation channel 602 during the upward process and be squeezed and clamped by the deformation channel 602. The arc-shaped plates 601 and the inner wall of the water and fertilizer operation cylinder 3 form a deformation space 604 with a bottom opening, and a compression spring 603 supporting the arc-shaped plates 601 is provided in the deformation space 604. Each arc-shaped plate 601 is fixed at the top to the water and fertilizer operation cylinder 3, and has an outwardly expanding arc-shaped part 605 at the bottom that bends toward the deformation space 604. The outwardly expanding arc-shaped part 605 and the arc-shaped plate 601 form a vertical clamping part 606. The two ends of the compression spring 603 are fixedly connected to the clamping part 606 and the inner wall of the water and fertilizer operation cylinder 3, respectively. The connector 201 is a cylindrical structure made of hard material, which can be hollow or solid. A central protrusion 202 is provided around the middle of its side wall. The side of the central protrusion 202 is flat, and the central protrusion 202 is connected to the top and bottom surfaces of the connector 201 through an inclined slope 203. At this time, the width of the bottom of the deformation channel 602 is not less than the diameter of the middle position of the inclined slope 203, and the diameter of the central protrusion 202 is greater than the width between the clamping parts 606, but less than the width of the top. The existence of the self-release buckle 6 allows it to cooperate with the connector 201.

[0025] A transmission mechanism, such as Figure 10As shown, the device includes a crank drive shaft 502, a travel shaft 8, and a power shaft 7 driven by a motor. The power shaft 7 is driven by a reducer powered by a motor or engine. The crank drive shaft 502, travel shaft 8, and power shaft 7 are arranged in parallel, and the three shafts are fixedly supported by a slewing bearing 9 without affecting their individual rotation. The power shaft 7 is equipped with a first transmission wheel 701 and a second transmission wheel 702. The first transmission wheel 701 and the second transmission wheel 702 are preferably transmission gears, and there is a gap between the two transmission wheels. The first transmission wheel 701 cooperates with a first meshing wheel 503 on the crank drive shaft 502 to transmit power to the crank drive shaft. 502. Since the first transmission wheel 701 and the first meshing wheel 503 are always in a meshing state, the crank drive shaft 502 and the power shaft 7 are always in a rotating state. The crank drive shaft 502 drives the crank slider mechanism 5 in any of the plug-in water and fertilizer drip irrigation devices described in embodiments 1-5 to move. That is, the end of the crank drive shaft 502 drives the turntable in the crank slider mechanism 5 to rotate, thereby driving the sealing rubber plug 2 to reciprocate up and down. The rim of the second transmission wheel 702 is composed of a protruding meshing part 7021 and a non-meshing part 7022. In practice, the arc length corresponding to the length of the protruding meshing part 7021 is 90°. The protruding meshing part 7021 is distributed... In the meshing portion, the non-meshing portion 7022 is a smooth surface without meshing teeth, and the distance from the edge of the protruding meshing portion 7021 to the center of the second transmission wheel 702 is greater than the distance from the edge of the non-meshing portion 7022 to the center of the second transmission wheel 702. The protruding meshing portion 7021 can mesh with the second meshing wheel 801 on the traveling shaft 8 to achieve intermittent power output from the traveling shaft 8 to the traveling power output end 802, thereby controlling the intermittent movement of the traveling wheel. Since the second transmission wheel 702 rotates continuously, when the protruding meshing portion 7021 on its edge rotates to mesh with the second meshing wheel 801, it drives the second meshing wheel 801 to rotate, thereby transmitting power; when ... the protruding meshing portion 7021 on its edge rotates to mesh with the second meshing wheel 801, it drives the second meshing wheel 801 to rotate, thereby transmitting power. When the non-meshing part 7022 of the rim of the second drive wheel 702 rotates to the position corresponding to the second meshing wheel 801, since its surface does not have meshing teeth, it cannot transmit power to the second meshing wheel 801, and the second meshing wheel 801 stops rotating. Moreover, the length of the protruding meshing part 7021 is such that the rotation period of the second meshing wheel 801 corresponds to the period when the water and fertilizer mixture is drawn into the closed cavity 301 in the plug-in water and fertilizer drip irrigation device. That is, when the second meshing wheel 801 rotates, the fertilizer truck moves forward. During this period, the water and fertilizer operation cylinder 3 in the plug-in water and fertilizer drip irrigation device is above the soil surface, which does not affect the movement of the fertilizer truck, and the water and fertilizer mixture is drawn in during this process.

[0026] A fertilizer applicator includes a water-fertilizer mixing chamber for mixing and temporarily storing water and fertilizer, and wheels for driving the applicator in the field. In practice, the applicator uses an existing frame and is designed with wheels, as well as auxiliary equipment such as brakes, motors or engines. The water-fertilizer mixing chamber is a common tank filled with water and fertilizer mixture. The bottom is connected to the transfer water tank 308 of a plug-in water-fertilizer drip irrigation device via a hose. The wheels of the applicator are powered by the driving power output end 802 of the transmission mechanism in Embodiment 6, and the applicator is equipped with any one of the plug-in water-fertilizer drip irrigation devices described in Embodiments 1-5.

Claims

1. A pluggable drip irrigation device, comprising a water and fertilizer working cylinder (3) with openings at both ends, wherein the bottom opening of the water and fertilizer working cylinder (3) is closed by a sealing plate (302) connected by a torsion spring, a sealing rubber plug (2) is provided inside the water and fertilizer working cylinder (3), and the top of the sealing rubber plug (2) is driven to rise and fall by a crank-slider mechanism (5), and a closed cavity (301) is formed between the sealing rubber plug (2) and the sealing plate (302), characterized in that: The outer side of the water and fertilizer operation cylinder (3) is provided with a limiting block (303), and the upper and lower sides of the limiting block (303) are respectively provided with an upper limiting plate (101) and a lower limiting plate (102), the sealing rubber plug (2) is frictionally connected with the inner wall of the water and fertilizer operation cylinder (3), and in the lifting process of the sealing rubber plug (2) driven by the crank slider mechanism (5), the sealing rubber plug (2) drives the water and fertilizer operation cylinder (3) to synchronously lift by relying on the friction force, until the limiting block (303) touches the upper limiting plate (101) or the lower limiting plate (102), the sealing rubber plug (2) overcomes the friction force and is relatively displaced with the water and fertilizer operation cylinder (3), draws the water and fertilizer mixture into the closed cavity (301), or pushes the water and fertilizer mixture in the closed cavity (301) to overcome the torsional force of the torsional spring and then push the sealing plate (302) to overturn and discharge from the bottom opening of the water and fertilizer operation cylinder (3).

2. The plug-in water and fertilizer drip irrigation device according to claim 1, characterized in that: In the process of the sealing rubber plug (2) driving the water and fertilizer operation cylinder (3) to synchronously lift by relying on the friction force, when rising to the highest point, the bottom of the water and fertilizer operation cylinder (3) is above the soil surface, and when descending to the lowest point, the bottom of the water and fertilizer operation cylinder (3) is inserted into the soil.

3. The plug-in water and fertilizer drip irrigation device according to claim 1, characterized in that: The bottom of the water and fertilizer operation cylinder (3) is provided with a conical operation head (4), the conical operation head (4) has a conical tip (401) capable of being inserted into the soil, and the conical tip (401) is provided with a water injection channel (402) communicated with the bottom opening of the water and fertilizer operation cylinder (3).

4. The plug-in water and fertilizer drip irrigation device according to claim 1, characterized in that: A transfer water tank (308) is arranged around the water and fertilizer operation cylinder (3), a water inlet pipe (309) on the transfer water tank (308) is communicated with a water and fertilizer bin through a water inlet hose, and the bottom of the transfer water tank (308) is communicated with the water and fertilizer operation cylinder (3) through at least one water suction hole (305), so that when the sealing rubber plug (2) moves upward and overcomes the friction force to be relatively displaced with the water and fertilizer operation cylinder (3), the water and fertilizer mixture in the transfer water tank (308) is drawn into the water and fertilizer operation cylinder (3) through the water suction hole (305).

5. The plug-in water and fertilizer drip irrigation device according to claim 4, characterized in that: The water suction hole (305) is a variable-diameter hole, and the diameter of one end thereof away from the transfer water tank (308) is greater than that of the other end, so as to form a clamping table (306) towards the water and fertilizer operation cylinder (3), a metal sheet (307) is rotationally arranged on the clamping table (306), and the metal sheet (307) relies on a magnet to close the water suction hole (305).

6. The plug-in water and fertilizer drip irrigation device according to claim 4, characterized in that: When the sealing rubber plug (2) starts to be relatively displaced with the water and fertilizer operation cylinder (3) and the sealing rubber plug (2) moves upward alone, the water suction hole (305) is flush with the bottom of the sealing rubber plug (2); when the sealing rubber plug (2) is at the lowest position in the water and fertilizer operation cylinder (3), the water suction hole (305) is blocked by the sealing rubber plug (2).

7. The plug-in water and fertilizer drip irrigation device according to claim 1, characterized in that: The outer side of the water and fertilizer operation cylinder (3) is provided with a support (1), the upper limiting plate (101) and the lower limiting plate (102) are fixedly connected with the support (1), the support (1) is provided with a guide sliding rail (103) in the vertical direction, and the outer side wall of the water and fertilizer operation cylinder (3) is slidably connected with the guide sliding rail (103) through a guide connecting plate (304).

8. The plug-in water and fertilizer drip irrigation device according to claim 1, characterized in that: The upper surface of the sealing rubber plug (2) is hinged with the crank slider mechanism (5) through a connecting head (201), a self-unbuckling device (6) is arranged above the sealing rubber plug (2), and when the sealing rubber plug (2) rises to the highest point, it is buckled into the self-unbuckling device (6), and during the descending process of the sealing rubber plug (2), the limiting block (303) cooperates with the lower limiting plate (102) to make the connecting head (201) unbuckle from the self-unbuckling device (6); the self-unbuckling device (6) comprises at least three arc-shaped plates (601) arranged uniformly around the inner wall of the water and fertilizer operation cylinder (3), and the arc-shaped plates (601) surround the deformation channel (602), the inner width of the deformation channel (602) decreases first and then increases from bottom to top, the minimum width of the deformation channel (602) is smaller than the width of the connecting head (201), the arc-shaped plates (601) and the inner wall of the water and fertilizer operation cylinder (3) form an open bottom deformation space (604), and a compression spring (603) is arranged in the deformation space (604) to support the arc-shaped plates (601).

9. A transmission mechanism comprising a crank transmission shaft (502), a walking shaft (8) and a power shaft (7) driven by power, and a first transmission wheel (701) and a second transmission wheel (702) are arranged on the power shaft (7), characterized in that: The first transmission wheel (701) is matched with the first meshing wheel (503) arranged on the crank transmission shaft (502) to transmit power to the crank transmission shaft (502), and the crank transmission shaft (502) drives the crank slider mechanism (5) in the plug-in water and fertilizer drip irrigation device in any one of claims 1-8 to move; the rim of the second transmission wheel (702) is composed of a protruding meshing part (7021) and a non-meshing part (7022), the protruding meshing part (7021) can be meshed and driven with the second meshing wheel (801) on the walking shaft (8) to realize intermittent power output of the walking shaft (8) to the walking power output end (802), and the length of the protruding meshing part (7021) can make the rotation period of the second meshing wheel (801) correspond to the period of drawing water and fertilizer mixture into the closed cavity (301) in the plug-in water and fertilizer drip irrigation device.

10. A fertilizing vehicle comprising a water and fertilizer mixing and temporary storage bin and a traveling wheel for driving the vehicle to travel in a field, characterized in that: The walking wheel of the fertilizer application vehicle is powered by the walking power output end (802) of the transmission mechanism of claim 9, and the plug-in water and fertilizer drip irrigation device of claim 9 is arranged on the fertilizer application vehicle.

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