A portable backpack fertilizer sprayer

Abstract

This utility model discloses a portable backpack fertilizer sprayer, belonging to the field of agricultural machinery technology. It includes a fertilizer tank, a carrying strap, a sprayer, a turning assembly, and a belt assembly. The turning assembly, located inside the fertilizer tank, includes an electric motor, a turning plate, a sleeve, a sliding rod, and a turning frame with a turning roller. The electric motor drives the turning plate, which, through the linkage of the sleeve and the sliding rod, causes the turning frame to reciprocate within the fertilizer tank, continuously agitating the fertilizer to prevent clumping and sedimentation. The belt assembly is fixed to the side wall of the fertilizer tank and wraps around and secures the operator's waist and abdomen to enhance carrying stability. This utility model, by incorporating the turning assembly, effectively prevents uneven fertilizer mixing, ensures fertilizer concentration, and avoids nozzle clogging. Furthermore, the addition of the belt assembly distributes the weight of the equipment, improving stability and comfort during extended operation.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a portable backpack fertilizer sprayer. Background Technology

[0002] Backpack sprayers, as a flexible and convenient agricultural tool, have been widely used in agricultural production, landscaping, and other fields. Operators can carry them on their backs and go deep into fields, mountains, or greenhouses where large machinery cannot reach to spray pesticides or liquid fertilizers, greatly improving operational flexibility.

[0003] With the development of agricultural technology, many high-efficiency fertilizers exist in solid forms such as wettable powders or granules, which need to be mixed with water on-site in the fertilizer tank of the sprayer before use. However, existing conventional backpack sprayers are mainly designed to store and spray pre-prepared stable liquids, and their internal structures are usually relatively simple, lacking optimized designs for the solid-liquid mixing process.

[0004] When solid fertilizer is added to water, even if it is shaken and mixed initially, due to the lack of continuous stirring, the heavier fertilizer particles will gradually settle to the bottom of the container due to gravity during prolonged standing or operation. In addition, some fertilizer powder is prone to agglomeration after absorbing moisture, forming clumps of varying sizes.

[0005] These settled particles and clumps cause extremely uneven liquid concentration within the fertilizer tank, with the upper layer being too thin and the lower layer too thick. More seriously, these clumps and high-concentration sediments easily clog the infusion hoses, filters, and nozzles when drawn into the sprayer's outlet, causing spraying interruptions and severely impacting fertilization efficiency. Operators are forced to frequently stop work to clean and unclog the equipment, wasting valuable time and significantly reducing the uniformity and precision of fertilization, failing to achieve ideal agronomic requirements.

[0006] Therefore, this utility model proposes a portable backpack fertilizer sprayer to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a portable backpack fertilizer sprayer, which aims to improve the problems of the existing portable backpack fertilizer sprayer, such as nozzle blockage and uneven spraying caused by fertilizer caking and sedimentation, as well as the single carrying method and user fatigue caused by long-term use.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a portable backpack fertilizer sprayer, comprising: a fertilizer box, a carrying strap, a sprayer, a material turning assembly, and a strap assembly. The carrying strap is connected to the back of the fertilizer box, the sprayer is connected to the bottom outlet of the fertilizer box via a hose, the material turning assembly is disposed inside the fertilizer box, and the strap assembly is fixed to the side wall of the fertilizer box. The material turning assembly includes an electric motor, a turning plate, a sleeve, a sliding rod, a turning frame, and a turning roller. The electric motor is installed on the outside of the fertilizer box and drives the turning plate to rotate. The turning plate drives the sleeve to move. The sliding rod is slidably disposed inside the sleeve. One end of the sliding rod is rotatably connected to the turning frame. The turning roller is fixedly connected to the turning frame.

[0009] Preferably, the material turning assembly further includes an outer fixing ring and a spring. The outer fixing ring is fixed to the outer wall of the slide rod, and the spring is sleeved on the outside of the slide rod, with one end abutting against the outer fixing ring and the other end abutting against the end of the sleeve.

[0010] Preferably, the strap assembly includes a fixing plate, which is fixed to the side wall of the fertilizer box.

[0011] Preferably, the strap assembly further includes a connecting shaft and a strap body, the strap body being rotatably connected to the fixed plate via the connecting shaft.

[0012] Preferably, the strap assembly further includes a torsion spring, which is disposed on the connecting shaft and its two ends act on the fixing plate and the strap body, respectively.

[0013] Preferably, the strap body has a limiting groove for fixing its length.

[0014] Preferably, the edge of the flip plate abuts against the outer wall of the sleeve to push the sleeve to move when the flip plate rotates.

[0015] Preferably, the turning frame is a frame structure, and the turning rollers are spaced apart and fixedly connected to the turning frame.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by using a material turning component that can reciprocate inside the fertilizer tank, the problem of fertilizer easily clumping and settling, which leads to nozzle blockage and uneven spraying, is solved. This achieves the effect of actively stirring, breaking up clumps, and ensuring uniform fertilizer concentration.

[0017] 2. This utility model solves the problem that traditional backpack equipment relies solely on the shoulders for weight-bearing, resulting in poor stability and shoulder fatigue after prolonged use. By adding a strap assembly that is fixedly connected to the fertilizer box in addition to the carrying strap, it effectively distributes the weight of the equipment to the waist and abdomen, prevents the equipment from swaying, and significantly improves carrying stability and comfort. Attached Figure Description

[0018] Figure 1 This is a perspective view of a portable backpack fertilizer sprayer proposed in this utility model; Figure 2 This is a schematic diagram of the fertilizer box of a portable backpack fertilizer sprayer proposed in this utility model; Figure 3 This is a schematic diagram of the material turning component of a portable backpack fertilizer sprayer proposed in this utility model; Figure 4 This is a schematic diagram of the strap assembly of a portable backpack fertilizer sprayer proposed in this utility model; Figure 5 This is a schematic diagram of the strap of a portable backpack fertilizer sprayer proposed in this utility model.

[0019] Legend: 1. Fertilizer bin; 2. Carrying strap; 3. Sprayer; 4. Turning assembly; 401. Electric motor; 402. Tilting plate; 403. Sleeve; 404. Slide rod; 405. Outer fixing ring; 406. Spring; 407. Turning frame; 408. Turning roller; 5. Strap assembly; 501. Fixing plate; 502. Connecting shaft; 503. Torsion spring; 504. Strap body; 505. Limiting groove. 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] Reference Figures 1-5 This utility model provides a portable backpack fertilizer sprayer, which aims to solve the problems of uneven spraying caused by clumping and sedimentation when mixing fertilizers in the prior art, as well as the poor stability of traditional backpack structures and the fatigue of users after long-term use.

[0022] Specifically, it includes a fertilizer tank 1 and a carrying strap 2 located on the back of the fertilizer tank 1. The fertilizer tank 1 serves as a container for storing fertilizer solution. The carrying strap 2 is used to carry the entire device on the operator's shoulder. The portable backpack fertilizer sprayer also includes a sprayer 3, a material turning assembly 4 located inside the fertilizer tank 1, and a strap assembly 5 fixed to the side wall of the fertilizer tank 1. The sprayer 3 is connected to the bottom outlet of the fertilizer tank 1 through a hose and is used to atomize and spray the liquid in the fertilizer tank 1. The material turning assembly 4 is used to stir the fertilizer in the fertilizer tank 1. The strap assembly 5 is used to stably fix the fertilizer tank 1 to the operator's waist and abdomen.

[0023] The material turning assembly 4 includes an electric motor 401, a turning plate 402, a sleeve 403, a slide bar 404, a turning frame 407, and a turning roller 408. The electric motor 401 is installed on the outside of the fertilizer box 1. The power output shaft of the electric motor 401 passes through the box wall of the fertilizer box 1 and drives the turning plate 402, which is set inside the fertilizer box 1, to rotate. The turning plate 402 drives the sleeve 403 to reciprocate inside the fertilizer box 1. The slide bar 404 is slidably set on the sleeve 403. Inside the fertilizer box 1, one end of the slide rod 404 is rotatably connected to the turning frame 407, realizing the transmission of motion. The turning roller 408 is fixedly connected to the turning frame 407. The turning roller 408 turns and stirs the material inside the fertilizer box 1 as the turning frame 407 moves. Through the continuous operation of the electric motor 401, the turning frame 407 and the turning roller 408 are driven to perform reciprocating stirring action inside the fertilizer box 1, ensuring that the fertilizer can be fully dispersed and evenly mixed with water.

[0024] To achieve automatic reset of the stirring mechanism and improve the smoothness of the movement, the material turning assembly 4 also includes an outer fixing ring 405 and a spring 406. The outer fixing ring 405 is fixed to the outer wall of the slide rod 404 by fasteners or integral molding. The spring 406 is a linear compression spring, which is sleeved on the outside of the slide rod 404. One end of the spring 406 abuts against the end face of the outer fixing ring 405, and the other end abuts against the end of the sleeve 403. When the turning plate 402 drives the sleeve 403 and the slide rod 404 to move in one direction to the end of the stroke, the outer fixing ring 405 will compress the spring 406, so that the spring 406 accumulates elastic potential energy. When the electric motor 401 rotates in the opposite direction, the spring 406 releases the stored elastic potential energy, pushes the outer fixing ring 405, and thus drives the slide rod 404 and the material turning frame 407 to quickly reset. This not only simplifies the load of the motor reverse drive, but also makes the whole reciprocating motion more continuous and stable.

[0025] To provide a stable mounting reference for the strap assembly 5, the strap assembly 5 includes a fixing plate 501, which is firmly fixed to the side wall of the fertilizer box 1 by means of bolts or rivets. Specifically, the fixing plate 501 can be set in the lower middle part of the side wall of the fertilizer box 1 so that the strap assembly 5 can be aligned with the waist or abdomen of the operator to achieve the best fixing and support effect. The fixing plate 501 itself is made of high-strength engineering plastic or lightweight metal alloy, which ensures sufficient connection strength without adding too much weight to the equipment.

[0026] To achieve flexible adjustment and fit of the strap, the strap assembly 5 also includes a connecting shaft 502 and a strap body 504. One end of the strap body 504 has an annular structure, and the fixing plate 501 has a corresponding mounting through hole. The connecting shaft 502 passes through the mounting through hole of the fixing plate 501 and the annular structure at the end of the strap body 504, so that the strap body 504 can be rotatably connected to the fixing plate 501 with the connecting shaft 502 as the center. This rotatable connection design allows the strap body 504 to swing freely, which is convenient for operators to quickly wind and adjust when carrying equipment. The strap body 504 is made of wear-resistant and flexible nylon webbing.

[0027] To ensure the strap can automatically tighten and always maintain a close fit, the strap assembly 5 also includes a torsion spring 503. The torsion spring 503 is mounted on the connecting shaft 502. Both ends of the torsion spring 503 are bent to form lever arms acting on the fixing plate 501 and the strap body 504, respectively. In the installed state, the torsion spring 503 is pre-applied with a torsional force, continuously applying a torque in the tightening direction to the strap body 504. When the operator loosens the strap body 504, the elastic force of the torsion spring 503 automatically retracts the excess strap body. It also provides tension during the adjustment process, ensuring that the strap can closely fit the operator's body contour and prevent it from becoming loose.

[0028] To reliably lock the length of the strap, multiple limiting grooves 505 for fixing its length are provided on the surface of the strap body 504 along its length direction. The limiting grooves 505 can be through rectangular holes. At the other end of the strap body 504 or on the fixing plate 501, a locking buckle that cooperates with the limiting groove 505 is provided. When the strap body 504 is adjusted to the appropriate length, the locking buckle is fastened into one of the limiting grooves 505 to achieve a firm length lock. Compared with the friction locking structure, this groove and buckle engagement locking method is more reliable and less prone to slippage due to vibration or external force during use, ensuring the continuous stability of the carrying.

[0029] The edge profile of the flip plate 402 is designed as a cam profile with a specific curve, and the outer wall of the sleeve 403 has a driven surface that contacts the cam profile. The flip plate 402 continuously abuts against the outer wall of the sleeve 403 through its irregular edge profile. When the electric motor 401 drives the flip plate 402 to rotate continuously, the changing radius will push the sleeve 403 to make a precise reciprocating linear motion along the axis of the slide rod 404, thus realizing the smooth conversion of the rotational motion of the motor into the reciprocating stirring motion required by the flipping assembly 4.

[0030] The specific structure of the turning frame 407 is a frame structure, such as a rectangular frame or a circular frame. Such a structure has high rigidity and can resist the resistance generated by the liquid during stirring. The turning rollers 408 are arranged at intervals and fixedly connected to the turning frame 407 vertically or inclinedly. The turning rollers 408 can be cylindrical rods or have spiral guide ribs on their surface. Through the large-range synchronous movement of multiple turning rollers 408 arranged at intervals, the liquid inside the fertilizer tank 1 can be turned and stirred three-dimensionally and without dead angles, which improves the mixing efficiency and effectively prevents fertilizer deposition in the corners of the tank.

[0031] Working Principle: During operation, the fertilizer tank 1 serves as the foundation for fertilizer storage. The turning assembly 4 prevents fertilizer from caking, ensures smooth transport, and facilitates mixing. After solid fertilizer or fertilizer concentrate is poured into the fertilizer tank 1, the electric motor 401 of the turning assembly 4 is activated. The electric motor 401 drives the turning plate 402 to rotate. Simultaneously, the turning plate 402 pushes the sleeve 403 and the sliding rod 404 within the sleeve 403 to move. Because the sliding rod 404 is rotatably connected to the turning frame 407, the movement of the sliding rod 404 directly causes the turning frame 407 to make a vertical displacement inside the fertilizer tank 1. The turning roller 408 on the turning frame 407 moves synchronously with it. The fertilizer inside the box is turned upside down, which not only breaks up the clumps of fertilizer, but also promotes the full mixing of fertilizer and water, ensuring uniform fertilizer concentration. When the turning frame 407 moves to the preset position, the outer fixing ring 405 on the outer wall of the slide rod 404 compresses the linear spring 406. The linear spring 406 accumulates elastic potential energy. When the electric motor 401 drives the flipping plate 402 in the opposite direction, the linear spring 406 releases its potential energy to push the outer fixing ring 405, which drives the slide rod 404, sleeve 403 and turning frame 407 to reset, realizing the reciprocating turning action of the turning frame 407, and avoiding fertilizer residue or clumps in the fertilizer box 1. While processing fertilizer, the carrying strap 2 and the belt assembly 5 work together to achieve portable carrying and fit adjustment of the equipment, and complete the precise fertilization operation with the sprayer 3: The fertilizer box 1 is slung on the operator's back via the carrying strap 2, the fixing plate 501 of the belt assembly 5 is fixed to the side wall of the fertilizer box 1, the connecting shaft 502 provides rotational support for the belt body 504, the torsion spring 503 releases the elastic force, and drives the belt body 504 to automatically fit towards the operator's body. The belt body 504 can be adjusted to a suitable length according to the operator's body shape, and its position is fixed by the limiting groove 505 to prevent the equipment from shaking when carried and reduce back pressure. Then the operator holds the nozzle of the sprayer 3 and sprays out the uniform fertilizer liquid delivered by the fertilizer box 1. The atomized fertilizer can accurately cover the crop leaves or root area, adapting to the fertilization needs of different scenarios such as farmland and orchards, taking into account portability and fertilizer uniformity, and solving the problems of fertilizer clumping and uncomfortable carrying of traditional sprayers 3.

Claims

1. A portable backpack fertilizer sprayer, comprising: The fertilizer box (1), carrying strap (2), sprayer (3), turning assembly (4) and strap assembly (5) are characterized in that the carrying strap (2) is connected to the back of the fertilizer box (1), the sprayer (3) is connected to the bottom outlet of the fertilizer box (1) through a hose, the turning assembly (4) is disposed inside the fertilizer box (1), and the strap assembly (5) is fixed to the side wall of the fertilizer box (1); The material turning assembly (4) includes an electric motor (401), a turning plate (402), a sleeve (403), a slide bar (404), a material turning frame (407), and a material turning roller (408). The electric motor (401) is installed outside the fertilizer box (1) and drives the turning plate (402) to rotate. The turning plate (402) drives the sleeve (403) to move. The slide bar (404) is slidably disposed inside the sleeve (403). One end of the slide bar (404) is rotatably connected to the material turning frame (407). The material turning roller (408) is fixedly connected to the material turning frame (407).

2. The portable backpack fertilizer sprayer according to claim 1, characterized in that, The material turning assembly (4) also includes an outer fixing ring (405) and a spring (406). The outer fixing ring (405) is fixed to the outer wall of the slide rod (404), and the spring (406) is sleeved on the outside of the slide rod (404), with one end abutting against the outer fixing ring (405) and the other end abutting against the end of the sleeve (403).

3. The portable backpack fertilizer sprayer according to claim 1, characterized in that, The strap assembly (5) includes a fixing plate (501) which is fixed to the side wall of the fertilizer box (1).

4. The portable backpack fertilizer sprayer according to claim 3, characterized in that, The strap assembly (5) further includes a connecting shaft (502) and a strap body (504), the strap body (504) being rotatably connected to the fixing plate (501) via the connecting shaft (502).

5. The portable backpack fertilizer sprayer according to claim 4, characterized in that, The strap assembly (5) also includes a torsion spring (503), which is disposed on the connecting shaft (502) and its two ends act on the fixing plate (501) and the strap body (504) respectively.

6. The portable backpack fertilizer sprayer according to claim 4, characterized in that, The strap body (504) is provided with a limiting groove (505) for fixing its length.

7. The portable backpack fertilizer sprayer according to claim 1, characterized in that, The edge of the flip plate (402) abuts against the outer wall of the sleeve (403) to push the sleeve (403) to move when the flip plate (402) rotates.

8. The portable backpack fertilizer sprayer according to claim 1, characterized in that, The material turning frame (407) is a frame structure, and the material turning rollers (408) are spaced apart and fixedly connected to the material turning frame (407).

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