Two-channel pulse fertilizer applicator

Abstract

The invention provides a double-channel pulse fertilizer applicator, and belongs to the technical field of agricultural water-saving irrigation. The fertilizer applicator comprises a jet element, a reversing device, a driving shaft, a driving device and a fertilizer applying device. Jet flow in the jet flow element impacts the split-flow wedge to enable the split-flow wedge to swing to drive the driving shaft to rotate; the driving shaft simultaneously drives the reversing device to switch the jet flow direction, and the piston of the fertilizing device is driven by the driving device to reciprocate, so that the first fertilizer suction port and the second fertilizer suction port alternately suck fertilizer, and the first fertilizer injection port and the second fertilizer injection port alternately inject fertilizer. The device is driven by pipeline water pressure, does not need external power, is compact in structure, can realize double-channel synchronous efficient fertilizer absorption and fertilizer injection, and meets diversified fertilizer application requirements.

Description

Technical Field

[0001] This invention relates to the field of agricultural water-saving irrigation technology, and in particular to a dual-channel pulse fertilizer applicator. Background Technology

[0002] As one of the core technologies of water-saving irrigation in modern agriculture, fertigation technology dissolves fertilizer in irrigation water and delivers the fertigation mixture evenly, quantitatively, and timely to the root zone of crops through a pressurized pipeline system, achieving the goal of precise fertilization by carrying fertilizer with water and coupling water and fertilizer. This technology not only significantly improves water and fertilizer utilization efficiency but also effectively reduces labor costs and minimizes non-point source pollution caused by excessive fertilization. It has been widely applied and rapidly developed in fields such as facility agriculture, orchards, and field crops.

[0003] Fertilization equipment is a key component in achieving integrated water and fertilizer management, and its performance directly affects fertilization precision, system stability, and operation and maintenance costs. Common fertilization equipment currently includes differential pressure fertilizer tanks, Venturi fertilizer applicators, hydraulically driven fertilizer pumps, electrically driven fertilizer pumps, and large-scale precision fertilizer applicators. Among these, hydraulically driven proportional fertilizer pumps have become an important type of equipment in the irrigation and fertilization field due to their advantages such as requiring no external power, relatively compact structure, stable fertilizer concentration, and ease of operation. This type of equipment typically uses pressurized water flow within irrigation pipes to drive the reciprocating motion of a piston or diaphragm, thereby completing the suction and injection of fertilizer solution.

[0004] However, existing hydraulically driven piston fertilizer applicators still face several technical limitations in practical applications. First, their internal structure is relatively complex, typically requiring an independent reversing mechanism to achieve the piston's reciprocating motion, resulting in a large number of parts, high assembly requirements, and a relatively high failure rate. Second, the precision requirements for the fit between the piston and cylinder are stringent; sediment and impurities in the irrigation water can easily cause wear or jamming of the seals, making them highly dependent on the water filtration system. If the filtration fails, the equipment's operational stability will be significantly affected. Furthermore, the high manufacturing cost of existing products limits their widespread adoption by ordinary farmers.

[0005] In scenarios requiring the simultaneous injection of two or more fertilizer solutions into the irrigation system, such as when crops at different growth stages have different nitrogen, phosphorus, and potassium requirements, or when acidic and alkaline fertilizers need to be injected separately to avoid precipitation reactions, the current common approach is to use two or more fertilizer applicators connected in parallel. This multi-device parallel approach not only increases system complexity and installation space but also brings a series of problems, including a significant increase in equipment investment, increased maintenance workload, and difficulties in system coordination and control. How to achieve dual-channel or multi-channel simultaneous fertilization in a single fertilizer applicator while maintaining a simple structure, reliable operation, and controllable cost has become a pressing technical challenge for those skilled in the art.

[0006] Furthermore, the reversing mechanisms of existing hydraulically driven fertilizer applicators are mostly mechanically triggered spring-reset or fork-type structures. After long-term operation, problems such as spring fatigue and fork wear are difficult to avoid, and the reliability of reversing decreases with the extension of service time. At the same time, when fertilizer solution is continuously injected into a single pipe, the uniformity of mixing with irrigation water often depends on the pipe length and the degree of turbulence. Uneven mixing is prone to occur under short-distance transportation or low-flow-rate conditions.

[0007] To address the shortcomings of the existing technologies, developing a new type of fertilization device that is simple in structure, reliable in reversal, low in cost, and capable of simultaneous fertilization through dual channels is of great practical significance for promoting the widespread application of integrated water and fertilizer technology. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a dual-channel pulse fertilizer applicator.

[0009] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0010] A dual-channel pulse fertilizer applicator includes a jet element, a reversing device, a drive shaft, a drive unit, and a fertilizer applicator.

[0011] The jet element includes a jet tube, a jet space, a flow divider, a first output tube, and a second output tube. The jet tube is connected to the jet space, and the outlet of the jet space is divided into two channels, which are respectively connected to the first output tube and the second output tube. The flow divider is located inside the outlet of the jet space and has a ∧-shaped structure. The vertex of the ∧ shape coincides with the intersection point of the inner walls of the first and second output tubes. The flow divider is connected to a drive shaft, and the drive shaft is located at the vertex of the ∧ shape. The drive shaft is supported on the wall of the jet space. The jet impacts the flow divider, causing the flow divider to swing around the drive shaft, thereby guiding the jet to alternately enter the first output tube or the second output tube, which is used to intermittently switch the first output tube and the second output tube on and off.

[0012] The reversing device is located on both sides of the inlet of the jet space and is used to switch the jet direction when the splitter swings to its limit position; the driving device is located outside the jet element and is connected to the driving shaft to convert the swing of the driving shaft into reciprocating motion; the fertilization device is connected to the driving device through a piston rod and drives the piston rod to reciprocate through the swing of the driving shaft to perform fertilizer suction and injection operations.

[0013] Furthermore, the reversing device includes a first reversing channel, a second reversing channel, an intake pipe, a first hole, a second hole, a first sleeve, a third hole, and a fourth hole;

[0014] The inlet of the jet space is connected to one end of a first reversing channel and one end of a second reversing channel on both sides respectively; a first sleeve is provided between the other ends of the first reversing channel and the second reversing channel, the first sleeve is connected to the first reversing channel through a third hole, and the first sleeve is connected to the second reversing channel through a fourth hole; the air inlet pipe is movably installed in the first sleeve, and a first hole and a second hole are respectively opened on both sides of the air inlet pipe; the bottom of the air inlet pipe is connected to a driving device, and the driving device drives the air inlet pipe to slide axially back and forth in the first sleeve;

[0015] When the intake pipe slides to the first position, the first hole and the fourth hole are connected, so that the second reversing channel is connected to the intake pipe; when the intake pipe slides to the second position, the second hole and the third hole are connected, so that the first reversing channel is connected to the intake pipe.

[0016] Furthermore, the shunt wedge includes a first wedge and a second wedge, which are symmetrically mounted on the drive shaft; the first wedge is located inside the first output tube, and the second wedge is located inside the second output tube; when the first wedge closes the first output tube, the second wedge opens the second output tube; when the first wedge opens the first output tube, the second wedge closes the second output tube.

[0017] Furthermore, the driving device includes a drive ring, a first connecting rod, and a rack;

[0018] The drive ring is connected to the drive shaft; the drive ring is a cam, and the bottom of the cam has an incomplete gear. The rack meshes with the incomplete gear at the bottom of the drive ring; one end of the rack is connected to the piston rod of the fertilizer applicator; the upper part of the cam contacts the air intake pipe through the first connecting rod, and the first connecting rod moves along a reciprocating linear path by the reciprocating rotation of the cam.

[0019] Furthermore, the driving device also includes a limiting mechanism located on both sides of the first connecting rod, which is used to allow only the first connecting rod to move in a straight line; a first roller and a second roller that can roll are respectively installed at both ends of the first connecting rod, the first roller is in contact with the air intake pipe, and the second roller is in contact with the surface contour of the drive ring.

[0020] Furthermore, the fertilization device includes a cylinder, a piston, a piston rod, a first fertilizer suction port, a second fertilizer suction port, a first fertilizer injection port, and a second fertilizer injection port;

[0021] The piston is located inside the cylinder, dividing the cylinder into two chambers. The first chamber has a first fertilizer suction port and a first fertilizer injection port, and the second chamber has a second fertilizer suction port and a second fertilizer injection port. One-way valves are provided at the first fertilizer suction port, the second fertilizer suction port, the first fertilizer injection port, and the second fertilizer injection port. The piston is connected to one end of the piston rod. When the piston rod moves to one side, the first fertilizer suction port draws in fertilizer liquid, and the second fertilizer injection port discharges fertilizer liquid. When the piston rod moves to the other side, the second fertilizer suction port draws in fertilizer liquid, and the first fertilizer injection port discharges fertilizer liquid.

[0022] Furthermore, the first fertilizer inlet is connected to the first tank, and the second fertilizer inlet is connected to the second tank (10); the first fertilizer injection port is connected to the outlet of the second output pipe, and the second fertilizer injection port is connected to the outlet of the first output pipe.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. The dual-channel pulse fertilizer applicator of this invention, by setting up a jet element and a rotatable flow divider structure, utilizes the jet adhesion effect to drive the flow divider to oscillate, thereby driving the drive shaft to rotate, directly converting the pressure energy of the water flow in the pipeline into mechanical driving force. This eliminates the need for an external power supply or additional power unit, enabling continuous operation of the fertilizer applicator and achieving the beneficial effects of significantly reducing equipment operating energy consumption and adapting to unpowered field operation environments.

[0025] 2. The dual-channel pulse fertilizer applicator of this invention, by simultaneously linking the drive shaft with both the reversing device and the drive device, enables the oscillating motion of the diverter to both trigger the reversing device to switch the jet direction and drive the piston of the fertilizer applicator to reciprocate via the drive ring. This linked design achieves the technical effects of simplifying the internal structure, reducing the number of parts, lowering assembly difficulty, and reducing manufacturing costs.

[0026] 3. The dual-channel pulse fertilizer applicator of this invention, by setting a first fertilizer suction port, a second fertilizer suction port, a first fertilizer injection port, and a second fertilizer injection port, and coordinating the phase relationship of the piston's reciprocating motion, achieves simultaneous fertilizer suction at one end of the piston and fertilizer injection at the other end. This dual-channel synchronous operation method achieves the positive effects of doubling the fertilizer suction and injection efficiency compared to single-channel equipment and significantly increasing the amount of fertilizer applied per unit time.

[0027] 4. The dual-channel pulse fertilizer applicator of this invention connects to different fertilizer storage tanks via a first and second fertilizer inlet, enabling a single fertilizer applicator to simultaneously inhale two different fertilizers. Furthermore, by connecting the first and second fertilizer inlets to two branch pipes or the same main pipe of an irrigation system, it allows for independent or mixed injection of the two fertilizer solutions. This design achieves multiple benefits, including meeting the differentiated fertilization needs of crops at different growth stages, preventing fertilizer mixing and sedimentation, and improving fertilization flexibility and adaptability.

[0028] 5. The dual-channel pulse fertilizer applicator of this invention alternately outputs pulsed water flow through the jet element output pipe, allowing the fertilizer solution to be injected into the irrigation pipe in a pulsed manner. The turbulence and impact generated by the pulsed water flow in the pipe promote thorough mixing of water and fertilizer, achieving the technical effect of ensuring uniform water and fertilizer mixing even under short-distance transportation conditions.

[0029] 6. The dual-channel pulse fertilizer applicator of this invention employs a pneumatic feedback switching method through a reversing device. It utilizes the sliding of the air inlet pipe within the sleeve to achieve alternating flow of the air vents, avoiding problems such as spring fatigue and fork wear in traditional mechanical reversing mechanisms. This structural design achieves the positive effects of stable and reliable reversing action, extended equipment lifespan, and reduced maintenance frequency.

[0030] 7. The dual-channel pulse fertilizer applicator of this invention can be connected in series as a functional tee between the main irrigation pipe and two branch pipes to inject fertilizer into the two branches separately; or it can be connected in parallel to the water supply pipeline via valve control to inject two different fertilizer solutions into the same main pipe. This versatility in connection achieves the technical effect of adapting to different irrigation system layouts and broadening the application scenarios of the equipment. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a front view of the dual-channel pulse fertilizer applicator described in this invention.

[0033] Figure 2 for Figure 1 The left view.

[0034] Figure 3 for Figure 2 AA section view.

[0035] Figure 4This is a schematic diagram of the driving device described in this invention.

[0036] Figure 5 This is a cross-sectional view of the commutation device described in this invention.

[0037] Figure 6 This is a cross-sectional view of the fertilizer application device described in this invention.

[0038] Figure 7 This is a schematic diagram of the dual-channel pulse fertilizer applicator described in this invention used in a pipeline system. Figure 1 .

[0039] Figure 8 This is a schematic diagram of the dual-channel pulse fertilizer applicator described in this invention used in a pipeline system. Figure 2 .

[0040] In the picture:

[0041] 1-Jet element; 101-Jet tube; 102-Jet space; 103-Flow divider; 104-First output pipe; 105-Second output pipe; 2-Reversing device; 201-First reversing channel; 202-Second reversing channel; 203-Inlet pipe; 204-First hole; 205-First sleeve; 206-Second hole; 207-Third hole; 208-Fourth hole; 3-Drive shaft; 4-Drive device; 401-Drive ring; 402-First roller; 403 404-First connecting rod; 405-Second roller; 406-Rack; 507-Fertilizer applicator; 501-Cylinder; 502-Piston; 503-Piston rod; 504-First fertilizer suction port; 505-Second fertilizer suction port; 506-First fertilizer injection port; 507-Second fertilizer injection port; 6-Main pipe; 7-First fork pipe; 8-Second fork pipe; 9-First tank; 10-Second tank; 11-Water supply pipe; 12-First valve; 13-Second valve; 14-Third valve; 15-Fourth valve. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, the dual-channel pulse fertilizer applicator of the present invention includes a jet element 1, a reversing device 2, a drive shaft 3, a drive device 4, and a fertilizer applicator 5.

[0046] like Figure 3 As shown, the jet element 1 includes a jet tube 101, a jet space 102, a flow divider 103, a first output tube 104, and a second output tube 105. The inlet end of the jet tube 101 is designed with a circular cross-section for direct connection to a standard irrigation pipe; its outlet end smoothly transitions to a rectangular cross-section. This change in cross-sectional shape helps to form a flat, high-speed jet within the jet space 102. The outlet of the jet tube 101 is connected to the jet space 102, which is a flat cavity structure that gradually narrows at the bottom and divides into two channels, smoothly transitioning to the first output tube 104 and the second output tube 105, respectively.

[0047] The diverter 103 is located inside the outlet of the jet space 102, and its overall structure is ∧-shaped. The vertex of the ∧ shape coincides with the intersection of the inner walls of the first output pipe 104 and the second output pipe 105. This arrangement allows the jet from the jet space 102 to be effectively guided to one of the output pipes when it impacts the diverter 103. The diverter 103 is connected to the drive shaft 3, and the drive shaft 3 is located at the vertex of the ∧ shape. The drive shaft 3 and the diverter 103 are fixedly connected to form an integral component, and the axis of the drive shaft 3 coincides with the center of the inscribed circle of the ∧-shaped structure of the diverter 103. The drive shaft 3 is supported on the wall of the jet space 102 by a bushing. The jet impacts the diverter 103, causing the diverter 103 to swing around the drive shaft 3, thereby guiding the jet to alternately enter the first output pipe 104 or the second output pipe 105, which is used to intermittently connect and disconnect the first output pipe 104 and the second output pipe 105.

[0048] like Figure 3 As shown, the diverter 103, under the action of the jet impact force, can swing freely within a certain angle range around the drive shaft 3. In the embodiment, the diverter 103 includes a first diverter and a second diverter, which are symmetrically mounted on the drive shaft 3. The first diverter is located inside the first output pipe 104, and the second diverter is located inside the second output pipe 105. When the first diverter completely closes the first output pipe 104, the second diverter makes the second output pipe 105 conductive. When the second diverter completely closes the second output pipe 105, the first diverter makes the first output pipe 104 conductive.

[0049] The reversing device 2 is located on both sides of the inlet of the jet space 102, and is used to switch the jet direction when the diverting wedge 103 swings to its limit position; combined with Figure 5As shown, the reversing device 2 includes a first reversing channel 201, a second reversing channel 202, an air inlet pipe 203, a first hole 204, a second hole 206, a first sleeve 205, a third hole 207, and a fourth hole 208; the left and right walls of the jet space 102 inlet are respectively connected to one end of the first reversing channel 201 and one end of the second reversing channel 202; a first sleeve 205 is provided between the other end of the first reversing channel 201 and the other end of the second reversing channel 202. The first sleeve 205 is connected to the first reversing channel 201 through the third hole 207, and the first sleeve 205 is connected to the second reversing channel 202 through the fourth hole 208. The air intake pipe 203 is movably installed inside the first sleeve 205, and the air intake pipe 203 has a first hole 204 and a second hole 206 on both sides respectively. The bottom of the air intake pipe 203 is connected to the driving device 4, and the driving device 4 drives the air intake pipe 203 to slide axially back and forth inside the first sleeve 205. When the air intake pipe 203 slides to the first position, the first hole 204 and the fourth hole 208 are connected, so that the second reversing channel 202 is connected to the air intake pipe 203. When the air intake pipe 203 slides to the second position, the second hole 206 and the third hole 207 are connected, so that the first reversing channel 201 is connected to the air intake pipe 203.

[0050] Combination Figure 4 As shown, the driving device 4 is located outside the jet element 1. The driving device 4 is connected to the driving shaft 3 and is used to convert the oscillation of the driving shaft 3 into reciprocating motion. The driving device 4 includes a driving ring 401, a first connecting rod 403, and a rack 405. The driving ring 401 is connected to the driving shaft 3 in a transmission manner. The driving ring 401 is a cam with a pointed upper end and a round lower end. The rotation center of the cam is the center of a circle. The lower end of the cam has partial teeth (i.e., an incomplete gear). The rack 405 meshes with the teeth at the lower end of the cam. One end of the rack 405 is connected to the piston rod 503 of the fertilizer applicator 5. The upper part of the cam contacts the air intake pipe 203 through the first connecting rod 403. Through the reciprocating rotation of the cam, the first connecting rod 403 moves along a reciprocating linear path.

[0051] The driving device 4 also includes a limiting mechanism located on both sides of the first connecting rod 403, which allows only linear movement of the first connecting rod 403. A first roller 402 and a second roller 404 are respectively mounted on both ends of the first connecting rod 403. The first roller 402 contacts the air intake pipe 203, and the second roller 404 contacts the surface contour of the drive ring 401. The limiting mechanism can be a bushing with a clearance fit to the first connecting rod 403, simply restricting the left and right movement of the first connecting rod 403.

[0052] The fertilization device 5 is connected to the drive device 4 via a piston rod 503. The piston rod 503 reciprocates via the swing of the drive shaft 3, performing fertilizer absorption and injection operations. Figure 6 As shown, the fertilization device 5 includes a cylinder 501, a piston 502, a piston rod 503, a first fertilizer suction port 504, a second fertilizer suction port 505, a first fertilizer injection port 506, and a second fertilizer injection port 507. The piston 502 is located inside the cylinder 501, and its outer edge is sealed to the inner wall of the cylinder, dividing the interior of the cylinder 501 into two chambers (a left chamber and a right chamber). The piston 502 is connected to one end of the piston rod 503. The left chamber is provided with the first fertilizer suction port 504 and the first fertilizer injection port 506, and the right chamber is provided with the second fertilizer suction port 507. The first fertilizer inlet 504, the second fertilizer inlet 505, the first fertilizer inlet 506, and the second fertilizer inlet 507 are all equipped with one-way valves to control the flow direction of the fertilizer solution. The one-way valve of the first fertilizer inlet 504 only allows the fertilizer solution to flow into the left chamber from left to right, and the one-way valve of the second fertilizer inlet 505 only allows the fertilizer solution to flow into the right chamber from right to left. The one-way valve of the first fertilizer inlet 506 only allows the fertilizer solution to flow out of the left chamber, and the one-way valve of the second fertilizer inlet 507 only allows the fertilizer solution to flow out of the right chamber. When the piston rod 503 moves to one side, the first fertilizer inlet 504 draws in the fertilizer solution, and the second fertilizer inlet 507 discharges the fertilizer solution; when the piston rod 503 moves to the other side, the second fertilizer inlet 505 draws in the fertilizer solution, and the first fertilizer inlet 506 discharges the fertilizer solution. The first fertilizer inlet 504 is connected to the first tank 9, and the second fertilizer inlet 505 is connected to the second tank 10; the first fertilizer inlet 506 is connected to the outlet of the second output pipe 105, and the second fertilizer inlet 507 is connected to the outlet of the first output pipe 104.

[0053] The working principle is as follows:

[0054] When pressurized water enters the jet pipe 101 from the main irrigation pipe 6, it forms a high-speed jet within the jet space 102. Due to the jet adhesion effect, this jet will randomly adhere to a side wall of the jet space 102. Assuming the initial state the jet adheres to the left side wall, the jet mainly flows out from the first output pipe 104. During its outflow, this jet continuously impacts the left side of the diverter 103, causing the diverter 103, along with the drive shaft 3 fixedly connected to it, to rotate counterclockwise by a small angle around its axis.

[0055] The counterclockwise rotation of drive shaft 3 drives the drive ring 401 fixed on it to rotate counterclockwise synchronously. The rotational motion of drive ring 401 produces two effects simultaneously:

[0056] On one hand, the incomplete gear of the drive ring 401 drives the rack 405 to move to the right. The rack 405 then pushes the piston rod 503 and piston 502 to move to the right. When piston 502 moves to the right, the volume of its left chamber (left chamber) increases and the internal pressure decreases. Under the action of the one-way valve at the first fertilizer inlet 504, the first fertilizer inlet 504 opens, drawing fertilizer liquid from the first tank 9 into the left chamber. At the same time, the volume of the right chamber (right chamber) of piston 502 decreases and the internal pressure increases. Under the action of the one-way valve at the second fertilizer inlet 507, the second fertilizer inlet 507 opens, drawing fertilizer liquid from the right chamber into the outlet of the first output pipe 104 and delivering it to the irrigation system.

[0057] On the other hand, the counterclockwise rotation of the drive ring 401 also drives the first connecting rod 403, causing the intake pipe 203 to slide upward within the first sleeve 205. When the drive ring 401 rotates counterclockwise to a specific angle, the second hole 206 on the intake pipe 203 aligns with the third hole 207 on the first sleeve 205, allowing the internal cavity of the intake pipe 203 to connect with the first reversing channel 201 through the second hole 206 and the third hole 207, and then connect with the left side wall of the jet space 102 through the left vent. Since the intake pipe 203 is closed at both ends but its internal cavity is open to the outside atmosphere through the first hole 204 or the second hole 206 (when the holes are not aligned), when the second hole 206 and the third hole 207 are aligned, the pressure at the left side wall of the jet space 102 rapidly drops to near atmospheric pressure. This pressure change disrupted the original jet adhesion conditions, causing the jet to instantly switch from the left wall to the right wall and flow out from the second output pipe 105.

[0058] The jet switching causes the jet to impact the right side of the splitter 103, pushing the splitter 103 and drive shaft 3 to rotate in the opposite direction (clockwise). The drive ring 401 rotates clockwise accordingly. On one hand, the incomplete gear of the drive ring 401 drives the rack 405 and piston 502 to move to the left. At this time, the second fertilizer inlet 505 draws fertilizer from the second tank 10 into the right chamber, while the first fertilizer inlet 506 pumps the fertilizer in the left chamber into the second fork tube 8. On the other hand, the drive ring 401, through the first connecting rod 403, makes the first hole 204 and the fourth hole 208 coincide and connect. Atmospheric pressure acts on the right wall of the jet space 102 through the first reversing channel 202, preparing for the next jet switching.

[0059] This process repeats itself continuously, with the jet periodically switching between the first output pipe 104 and the second output pipe 105, driving the piston 502 to reciprocate continuously, thus achieving uninterrupted fertilizer suction and injection. Throughout the entire operation, for each reciprocating motion of the piston 502, each of the two suction ports completes one fertilizer suction action, and each of the two injection ports completes one fertilizer injection action, achieving synchronous and efficient fertilization through dual channels.

[0060] Figure 7 This demonstrates a typical application of this embodiment. The dual-channel pulse fertilizer applicator, acting as a functional tee, is connected in series between the main irrigation pipe 6 and two branch pipes. Specifically, the front end of the jet pipe 101 is connected to the main pipe 6, the end of the first output pipe 104 is connected to the front end of the first branch pipe 7, and the end of the second output pipe 105 is connected to the front end of the second branch pipe 8. The first fertilizer suction port 504 is connected via a pipe to the first tank 9 containing the first type of fertilizer, and the second fertilizer suction port 505 is connected via a pipe to the second tank 10 containing the second type of fertilizer. The first fertilizer injection port 506 is connected via a pipe to the second branch pipe 8, and the second fertilizer injection port 507 is connected via a pipe to the first branch pipe 7. Through this connection method, the fertilizer applicator can inject two different fertilizers into two different irrigation branch pipes respectively, meeting the differentiated nutrient needs of crops at different growth stages.

[0061] Another typical application of this embodiment is as follows: Figure 8 As shown, the dual-channel pulse fertilizer applicator can also be connected in parallel within the water supply pipe 11. The water supply pipe 11 is divided into an upstream and downstream section by a first valve 12. The front end of the jet pipe 101 is connected to the upstream section of the water supply pipe 11 via a second valve 13. The first output pipe 104 is connected to the downstream section of the water supply pipe 11 via a third valve 14, and the second output pipe 105 is connected to the downstream section of the water supply pipe 11 via a fourth valve 15. In this connection method, the fertilizer applicator can inject two different fertilizers or the same fertilizer into the same main pipe through two injection ports, achieving rapid mixing of the fertilizer solution within the pipe.

[0062] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0063] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual-channel pulse fertilizer applicator, characterized in that, It includes a jet element (1), a reversing device (2), a drive shaft (3), a drive device (4), and a fertilizer application device (5). The jet element (1) includes a jet tube (101), a jet space (102), a flow divider (103), a first output tube (104), and a second output tube (105). The jet tube (101) is connected to the jet space (102). The outlet of the jet space (102) is divided into two channels, which are respectively connected to the first output tube (104) and the second output tube (105). The flow divider (103) is located inside the outlet of the jet space (102) and has a ∧-shaped structure. The vertex of the ∧ shape is connected to the first output tube (104). The inner wall intersection of the first output tube (104) and the second output tube (105) coincides; the diverter (103) is connected to the drive shaft (3), and the drive shaft (3) is located at the apex of the ∧ shape; the drive shaft (3) is supported on the wall of the jet space (102), and the jet impacts the diverter (103), causing the diverter (103) to swing around the drive shaft (3), thereby guiding the jet to alternately enter the first output tube (104) or the second output tube (105), which is used to intermittently switch the first output tube (104) and the second output tube (105); The reversing device (2) is located on both sides of the inlet of the jet space (102) and is used to switch the jet direction when the splitter (103) swings to the limit position; the driving device (4) is located outside the jet element (1) and is connected to the driving shaft (3) to convert the swing of the driving shaft (3) into reciprocating motion; the fertilizer application device (5) is connected to the driving device (4) through the piston rod (503) and drives the piston rod (503) to reciprocate through the swing of the driving shaft (3) to perform fertilizer suction and fertilizer injection operations.

2. The dual-channel pulse fertilizer applicator according to claim 1, characterized in that, The reversing device (2) includes a first reversing channel (201), a second reversing channel (202), an air intake pipe (203), a first hole (204), a second hole (206), a first sleeve (205), a third hole (207), and a fourth hole (208). The inlet of the jet space (102) is connected to one end of the first reversing channel (201) and one end of the second reversing channel (202) respectively; a first sleeve (205) is provided between the other end of the first reversing channel (201) and the other end of the second reversing channel (202). The first sleeve (205) is connected to the first reversing channel (201) through a third hole (207) and to the second reversing channel (202) through a fourth hole (208); the air inlet pipe (203) is movably installed in the first sleeve (205). The air inlet pipe (203) has a first hole (204) and a second hole (206) respectively on both sides; the bottom of the air inlet pipe (203) is connected to the driving device (4), and the driving device (4) drives the air inlet pipe (203) to slide axially back and forth in the first sleeve (205); When the intake pipe (203) slides to the first position, the first hole (204) and the fourth hole (208) are connected, so that the second reversing channel (202) is connected to the intake pipe (203); when the intake pipe (203) slides to the second position, the second hole (206) and the third hole (207) are connected, so that the first reversing channel (201) is connected to the intake pipe (203).

3. The dual-channel pulse fertilizer applicator according to claim 1, characterized in that, The diverter (103) includes a first diverter and a second diverter, which are symmetrically mounted on the drive shaft (3). The first diverter is located inside the first output tube (104), and the second diverter is located inside the second output tube (105). When the first diverter closes the first output tube (104), the second diverter opens the second output tube (105). When the first diverter opens the first output tube (104), the second diverter closes the second output tube (105).

4. The dual-channel pulse fertilizer applicator according to claim 2, characterized in that, The drive device (4) includes a drive ring (401), a first connecting rod (403), and a rack (405). The drive ring (401) is connected to the drive shaft (3) for transmission; the drive ring (401) is a cam, and the bottom of the cam has an incomplete gear. The rack (405) meshes with the incomplete gear at the bottom of the drive ring (401); one end of the rack (405) is connected to the piston rod (503) of the fertilizer applicator (5); the upper part of the cam contacts the air intake pipe (203) through the first connecting rod (403), and the first connecting rod (403) moves along a reciprocating straight line by the reciprocating rotation of the cam.

5. The dual-channel pulse fertilizer applicator according to claim 4, characterized in that, The drive device (4) further includes a limiting mechanism located on both sides of the first link (403) for allowing only the first link (403) to move linearly; a first roller (402) and a second roller (404) are respectively mounted on both ends of the first link (403), the first roller (402) is in contact with the air intake pipe (203), and the second roller (404) is in contact with the surface contour of the drive ring (401).

6. The dual-channel pulse fertilizer applicator according to claim 1, characterized in that, The fertilizer applicator (5) includes a cylinder (501), a piston (502), a piston rod (503), a first fertilizer suction port (504), a second fertilizer suction port (505), a first fertilizer injection port (506), and a second fertilizer injection port (507); The piston (502) is located inside the cylinder (501) and divides the interior of the cylinder (501) into two chambers. The first chamber is provided with a first fertilizer suction port (504) and a first fertilizer injection port (506), and the second chamber is provided with a second fertilizer suction port (505) and a second fertilizer injection port (507). One-way valves are provided at the first fertilizer suction port (504), the second fertilizer suction port (505), the first fertilizer injection port (506), and the second fertilizer injection port (507). The piston (502) is connected to one end of the piston rod (503). When the piston rod (503) moves to one side, the first fertilizer suction port (504) draws in fertilizer liquid, and the second fertilizer injection port (507) discharges fertilizer liquid. When the piston rod (503) moves to the other side, the second fertilizer suction port (505) draws in fertilizer liquid, and the first fertilizer injection port (506) discharges fertilizer liquid.

7. The dual-channel pulse fertilizer applicator according to claim 6, characterized in that, The first fertilizer inlet (504) is connected to the first tank (9), and the second fertilizer inlet (505) is connected to the second tank (10); the first fertilizer injection port (506) is connected to the outlet of the second output pipe (105), and the second fertilizer injection port (507) is connected to the outlet of the first output pipe (104).

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