A precision fertilization device for greenhouse crops

Abstract

This utility model relates to the field of greenhouse crop fertilization technology, specifically a precision fertilization device for greenhouse crop roots. A drive motor at the top of the storage tank drives a stirring shaft and stirring blades to mix water and fertilizer. A filter screen inside the tank traps impurities. A suction pump draws the filtered fertilizer solution through a suction pipe, pressurizes it, and delivers it to a delivery pipe via a pump connector. A clamp secures the delivery pipe, and a pin connects to the top of a threaded rod. The threaded rod engages with an internal threaded cylinder to achieve height adjustment. A bottom fixing plate of a conical block is bolted to the foundation. An L-shaped sealing connector is connected to the end of the delivery pipe. A rubber block and guide rod are installed inside the top exhaust valve cylinder. Air pressure lifts the rubber block to release air, and hydraulic sealing of the valve cover occurs when the liquid level rises. Multiple flexible hoses connect to the bottom of the delivery pipe, with branch pipes at their ends. The branch pipes are equipped with insertion tubes. Here, height adjustment matches the root growth depth, ground-suspended support prevents pipe corrosion, automatic venting ensures stable distribution, and filtration and stirring improve uniformity, ultimately achieving precise root supply.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse crop fertilization technology, specifically a precision fertilization device for greenhouse crop roots. Background Technology

[0002] In the process of promoting modern agriculture in arid and semi-arid regions, the existing technological system is unable to meet the needs of efficient resource utilization due to the contradiction between the extreme scarcity of water resources (3.8% of the water resources support 24.5% of the land area) and the widespread phenomenon of excessive fertilization in farmland. The main contradiction is the fundamental mismatch between the dynamic changes in the actual water and fertilizer requirements of crops and the static supply capacity of the existing irrigation and fertilization system. This mismatch is specifically manifested in: infrastructure that cannot adapt to regional differences, high fertilizer costs and poor system compatibility, farmers' lack of understanding leading to improper operation, and a lack of technical personnel and system platforms to support precise decision-making. The direct consequences are low precision and poor uniformity of irrigation and fertilization, which not only wastes water and fertilizer resources but also causes problems such as soil salinization, fertilizer leaching, and environmental pollution. Therefore, a precision fertilization device is needed to avoid water waste.

[0003] However, the support columns of traditional fertilization devices cannot be height adjusted, and their fixed pipe installation positions cannot adapt to the changes in the depth of crop roots from the seedling stage to the mature stage, resulting in the fertilization position being deviated from the effective root zone for a long time. Moreover, existing devices generally lay the pipes directly on the surface of moist soil, and the outer wall of the pipe is in continuous contact with the water vapor environment containing corrosive fertilizer, which accelerates the aging and perforation of the pipe material, and the accumulation of air in the pipe can easily cause the flow imbalance of the terminal diversion pipe. Utility Model Content

[0004] The purpose of this invention is to provide a precision fertilization device for greenhouse crops to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A precision fertilization device for greenhouse crops includes a clamp. One side of the clamp is mounted on the top of a threaded rod via a pin. The bottom end of the threaded rod is threaded into an internal threaded cylinder. A conical block is fixedly installed at the bottom end of the internal threaded cylinder. A fixing plate is installed at the bottom height of the conical block. A fixing hole is provided on the fixing plate, and a bolt passes through the fixing hole to fix it to the foundation. The clamp is sleeved on the outside of a delivery pipe and fixed with bolts. The delivery pipe is arranged in parallel, and several flexible hoses are installed through its radial bottom ends. Several diversion pipes are fixedly installed at the ends of the flexible hoses, and insertion tubes are fixedly installed at the ends of the diversion pipes.

[0007] Preferably, each end of the conveying pipe is fixedly installed with an assembly joint, and one of the assembly joints is connected to the sealing joint by a bolt. The other end of the sealing joint is bent in an L-shape and faces upward, and an exhaust valve cylinder is installed by a thread.

[0008] Preferably, a rubber block is movably installed inside the exhaust valve cylinder, a guide rod is fixedly installed at the top of the rubber block, a valve cover is bolted to the top of the exhaust valve cylinder, an exhaust pipe is fixedly installed at the top of the valve cover, and when the valve cover is connected to the exhaust valve cylinder, the guide rod is inserted into the exhaust pipe.

[0009] Preferably, another assembly joint of the delivery pipe is connected to the pumping joint by bolts. The pumping joint is fixedly installed on the pumping end of the suction pump. The suction end of the suction pump is provided with a suction joint, and a suction pipe is installed on the suction joint by bolts.

[0010] Preferably, the other end of the suction tube is fixedly installed on the lower radial side of the storage tank, the top of the storage tank is bolted with a lid, the top of the lid is bolted with a drive motor, and the top of the lid is fixedly installed with a liquid inlet connector adjacent to the drive motor.

[0011] Preferably, the output end of the drive motor is provided with a stirring shaft, which extends through the bucket cover and into the interior of the storage bucket. Several stirring blades are symmetrically installed on the radial outer side of the stirring shaft, and a filter screen is fixedly installed on the inner wall of the storage bucket below the stirring shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This precision fertilization device for greenhouse crops uses a threaded rod that is screwed into an inner threaded cylinder to adjust the depth of insertion, thereby driving the clamp and the delivery pipe fixed by the clamp to rise and fall synchronously. This achieves dynamic matching between the height of the fertilization pipe and the growth position of the crop roots, solving the problem of misaligned fertilization caused by the fixed height of traditional devices.

[0014] 2. This precision fertilization device for greenhouse crops raises the delivery pipe above ground level through a base support structure consisting of conical blocks, fixing plates, and foundation bolts, completely isolating the pipe from soil moisture erosion. At the same time, combined with the sealing mechanism of the rubber block inside the exhaust valve cylinder under hydraulic action, it eliminates the interference of air resistance on the flow of the multi-stage diversion network. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the exhaust valve cylinder and clamp of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the flexible hose of this utility model;

[0018] Figure 4 This is a schematic diagram of the planar structure of the storage bucket of this utility model.

[0019] In the diagram: 101, clamp; 102, threaded rod; 103, internally threaded cylinder; 104, conical block; 105, fixing plate; 106, fixing hole; 107, delivery pipe; 108, hose; 109, diverter pipe; 110, insertion tube; 111, assembly joint; 112, sealing joint; 113, exhaust valve cylinder; 114, rubber block; 115, guide rod; 116, valve cover; 117, exhaust pipe; 118, pumping joint; 119, suction pump; 120, suction joint; 121, suction pipe; 122, storage tank; 123, liquid inlet joint; 124, tank lid; 125, drive motor; 126, stirring shaft; 127, stirring blade; 128, filter screen. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0022] A precision fertilization device for greenhouse crops includes a clamp 101. One side of the clamp 101 is mounted on the top of a threaded rod 102 via a pin. The bottom end of the threaded rod 102 is threaded into an internal threaded cylinder 103. A conical block 104 is fixedly installed at the bottom end of the internal threaded cylinder 103. A fixing plate 105 is installed at the bottom height of the conical block 104. A fixing hole 106 is provided on the fixing plate 105. Bolts pass through the fixing hole 106 to fix it to the foundation. The clamp 101 is sleeved on the outside of a delivery pipe 107 and fixed with bolts. The delivery pipe 107 is arranged in parallel, and several flexible hoses 108 are respectively installed through its radial bottom end. Several diversion pipes 109 are fixedly installed at the ends of the flexible hoses 108. Insertion tubes 110 are fixedly installed at the ends of the diversion pipes 109.

[0023] The above scheme allows for the circumferential clamping and fixing of the delivery pipe via clamps, the horizontal rotational connection between the threaded rod and clamp via pins, the adjustment of the screwing depth within the internal threaded cylinder via the threaded rod, the restriction of axial displacement and vertical support via the internal threaded cylinder, the centralized transfer of load on the fixed plate via conical blocks, the stable support of the base of the supporting structure via the fixed plate, the anchoring connection between bolts and the foundation via fixing holes, the main channel delivery of liquid fertilizer via the delivery pipe, the initial fluid distribution from the delivery pipe to the distribution pipe via flexible hoses, the diversion and diffusion from a single flexible hose to multiple insertion tubes via the distribution pipes, and the directional injection of fertilizer into the crop roots via insertion tubes.

[0024] In this embodiment, preferably, assembly joints 111 are fixedly installed at both ends of the conveying pipe 107, and one of the assembly joints 111 is connected to the sealing joint 112 by bolts. The other end of the sealing joint 112 is bent in an L-shape and faces upwards, and an exhaust valve cylinder 113 is installed by threads.

[0025] The above scheme allows for the sealing connection of the ends of adjacent conveying pipes by assembling the joint, the sealing of the ends of the conveying pipes and the construction of the exhaust valve mounting base by sealing the joint, and the main body of the automatic exhaust valve body can be accommodated by the exhaust valve cylinder.

[0026] In this embodiment, preferably, a rubber block 114 is movably installed inside the exhaust valve cylinder 113, a guide rod 115 is fixedly installed at the top of the rubber block 114, a valve cover 116 is bolted to the top of the exhaust valve cylinder 113, and an exhaust pipe 117 is fixedly installed at the top of the valve cover 116. When the valve cover 116 is connected to the exhaust valve cylinder 113, the guide rod 115 is inserted into the exhaust pipe 117.

[0027] The above scheme allows for the opening of the exhaust channel during pneumatic lifting and the sealing contact of the valve cover under hydraulic action via the rubber block. The guide rod enables axial guidance of the lifting and lowering movement of the rubber block. The valve cover enables the sealing of the top of the exhaust valve cylinder and the installation and positioning of the exhaust pipe. The exhaust pipe enables the directional discharge of the accumulated gas.

[0028] In this embodiment, preferably, another assembly joint 111 of the delivery pipe 107 is connected to the pumping joint 118 by bolts. The pumping joint 118 is fixedly installed on the pumping end of the suction pump 119. The suction end of the suction pump 119 is provided with a suction joint 120, and a suction pipe 121 is installed on the suction joint 120 by bolts.

[0029] The above scheme allows for the connection between the outlet of the suction pump and the inlet of the delivery pipe via the pumping connector. The suction pump provides the power for pressurizing and conveying the filtered fertilizer. The suction connector ensures a sealed connection between the suction pipe and the inlet of the suction pump. The suction pipe provides a fluid suction channel from the storage tank to the suction pump.

[0030] In this embodiment, preferably, the other end of the suction tube 121 is fixedly installed on the lower radial side of the storage tank 122, the top of the storage tank 122 is bolted with a lid 124, the top of the lid 124 is bolted with a drive motor 125, and the top of the lid 124 is fixedly installed with a liquid inlet connector 123 adjacent to the drive motor 125.

[0031] The above solution provides a temporary storage space for liquid fertilizer before filtration through a storage tank, a removable and sealed top of the storage tank through a tank lid, a drive motor to provide rotational power output for the stirring shaft, and an inlet connector to provide an interface for injecting external fertilizer solution into the storage tank.

[0032] In this embodiment, preferably, the output end of the drive motor 125 is provided with a stirring shaft 126. The stirring shaft 126 extends through the barrel cover 124 and into the storage barrel 122. A plurality of stirring blades 127 are symmetrically installed on the radial outer side of the stirring shaft 126. A filter screen plate 128 is fixedly installed on the inner wall of the storage barrel 122 and below the stirring shaft 126.

[0033] The above scheme enables the transmission of drive motor torque to the stirring blades via the stirring shaft, the stirring blades to create turbulent flow of fertilizer solution within the tank, and the filter screen to mechanically trap undissolved solid particles.

[0034] In this embodiment, when the liquid fertilizer enters the storage tank 122 through the inlet connector 123, the drive motor 125 starts, driving the stirring shaft 126 and the stirring blades 127 on its outer side to rotate at high speed inside the tank. This powerful stirring action fully agitates the fertilizer, promoting the accelerated dissolution and mixing of soluble precipitates, significantly improving the uniformity and effectiveness of the fertilizer solution. The filter screen 128 located below the inner wall of the storage tank 122 is responsible for blocking solid precipitates that have not dissolved after stirring, effectively preventing undissolved impurities from entering the subsequent conveying process and ensuring the smoothness of the system. The liquid fertilizer, after thorough stirring and filtration, collects at the bottom of the storage tank 122. At this point, the suction pump 119 starts working, its suction end drawing out the filtered liquid fertilizer from the bottom of the storage tank 122 through the suction pipe 121. After being pressurized by the suction pump 119, the fertilizer is injected into the connected delivery pipe 107 through the pump connector 118. The main body of the fertilization device—the delivery pipe 107—is securely installed by the clamping and tightening action of multiple clamps 101. Each clamp 101 is connected to a set of support and adjustment structures: the clamps 101 are connected to... The top of the threaded rod 102 allows it to rotate flexibly in the horizontal plane, while the bottom of the threaded rod 102 is screwed into a fixed internal threaded cylinder 103. When the operator rotates the threaded rod 102, its insertion depth within the internal threaded cylinder 103 changes accordingly, thereby enabling precise and flexible height adjustment of the clamp 101 and the conveying pipe 107 it fixes, to adapt to the needs of crops at different growth stages or different planting terrains. The base of this support structure is securely connected to the foundation (e.g., large) via a conical block 104 and a fixing plate 105. The ground or dedicated base of the shed), the fixed plate 105 has pre-set fixing holes 106 for bolts to be inserted for final tightening, providing solid anti-overturning stability for the entire conveying structure and ensuring safety during long-term operation; the liquid fertilizer fills the conveying pipe 107 under pump pressure, and to remove residual air in the pipeline system and avoid air resistance affecting fertilizer conveying efficiency and accuracy, an automatic venting structure is provided: the sealing joint 112 at one end of the conveying pipe 107 is L-shaped and upturned and connected to the venting valve cylinder 113, when the liquid flows into the pipe and pushes the air... When the gas rises, the accumulated gas pressure will push the rubber block 114 inside the exhaust valve cylinder 113 upward. The guide rod 115, which is integrated with the rubber block 114, will then slide upward in the exhaust pipe 117, thereby connecting the exhaust channel and allowing the gas to escape. After the gas is discharged, when the liquid touches the rubber block 114, the liquid pressure will push the rubber and the valve cover 116 to form a seal, effectively preventing the leakage of fertilizer liquid. This process ensures that the system can vent the air in time when it starts to transport liquid, and maintain a reliable seal during normal transport.The liquid fertilizer delivery pipe 107, filled with liquid fertilizer, undergoes initial diversion along its length through several flexible hoses 108 installed radially at the bottom. Each hose 108 further subdivides the fertilizer through multi-stage diversion pipes 109, ultimately guiding the fertilizer precisely through multiple insertion tubes 110 at the end of the diversion pipes 109 and injecting it into the designated soil depth near the crop roots. The entire system, through coordinated control, achieves a complete workflow for liquid fertilizer application, from efficient mixing and dissolution, impurity filtration, power pumping, flexible pipe height adjustment, multi-stage uniform diversion, to precise point-to-point application to the root zone. Its structural design prevents direct contact between the core delivery pipe 107 and damp ground, significantly reducing corrosion risk and extending the device's lifespan. Simultaneously, its height-adjustable support structure and the precise application unit at the end work in perfect harmony to ensure stable, uniform, and appropriately positioned nutrient delivery to the crop roots at different stages, ultimately achieving water conservation during precise fertilization.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precision root zone fertilization device for greenhouse crops comprising a clamp (101), characterized in that: The clamp (101) is mounted on the top of the threaded rod (102) by a pin on one side. The bottom of the threaded rod (102) is threaded into the inner threaded cylinder (103). A conical block (104) is fixedly installed at the bottom of the inner threaded cylinder (103). A fixing plate (105) is installed at the bottom height of the conical block (104). A fixing hole (106) is opened on the fixing plate (105). A bolt passes through the fixing hole (106) to form a fixation with the foundation. The clamp (101) is sleeved on the outside of the conveying pipe (107) and fixed by bolts. The conveying pipe (107) is arranged in parallel and several hoses (108) are installed through its radial bottom. Several diverter pipes (109) are fixedly installed at the end of the hoses (108). Insertion tubes (110) are fixedly installed at the end of the diverter pipes (109).

2. The precision root zone fertilization device for greenhouse crops of claim 1, wherein: The two ends of the conveying pipe (107) are respectively fixedly installed with assembly joints (111), and one of the assembly joints (111) is connected to the sealing joint (112) by bolts. The other end of the sealing joint (112) is bent in an L shape and faces upward, and an exhaust valve cylinder (113) is installed by thread.

3. The precision root zone fertilization device for greenhouse crops of claim 2, wherein: A rubber block (114) is movably installed inside the exhaust valve cylinder (113). A guide rod (115) is fixedly installed on the top of the rubber block (114). A valve cover (116) is bolted to the top of the exhaust valve cylinder (113). An exhaust pipe (117) is fixedly installed on the top of the valve cover (116). When the valve cover (116) is connected to the exhaust valve cylinder (113), the guide rod (115) is inserted into the exhaust pipe (117).

4. The precision root zone fertilization device for greenhouse crops of claim 3, wherein: Another assembly joint (111) of the delivery pipe (107) is connected to the pumping joint (118) by bolts. The pumping joint (118) is fixedly installed on the pumping end of the suction pump (119). The suction end of the suction pump (119) is provided with a suction joint (120), and a suction pipe (121) is installed on the suction joint (120) by bolts.

5. The precision fertilization device for greenhouse crops according to claim 4, characterized in that: The other end of the suction tube (121) is fixedly installed on the radially outer side of the storage tank (122). The top of the storage tank (122) is fitted with a lid (124) by bolts. The top of the lid (124) is fitted with a drive motor (125) by bolts in the middle. The top of the lid (124) is fitted with a liquid inlet connector (123) at the position adjacent to the drive motor (125).

6. The precision root zone fertilization device for greenhouse crops of claim 5, wherein: The output end of the drive motor (125) is provided with a stirring shaft (126). The stirring shaft (126) extends through the bucket cover (124) and into the storage bucket (122). Several stirring blades (127) are symmetrically installed on the radial outer side of the stirring shaft (126). A filter screen plate (128) is fixedly installed on the inner wall of the storage bucket (122) below the stirring shaft (126).

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