Dual-mode small efficient flue-cured tobacco leaf surface spraying device

Abstract

The invention discloses a dual-mode small efficient flue-cured tobacco leaf surface spraying device which comprises a supporting moving frame, and a liquid tank, a diaphragm pump and a spraying mechanism are arranged on the supporting moving frame; a backpack shoulder strap is arranged on one side of the liquid tank, a rotary stirring mechanism is arranged in a liquid containing cavity in the liquid tank, a diaphragm pump and a buffer tank are installed on the supporting moving frame, a liquid outlet in the bottom of the liquid containing cavity is connected with an inlet of the diaphragm pump, an outlet of the diaphragm pump is connected to an inlet of the buffer tank, and an outlet of the buffer tank is connected to a spraying mechanism; the spraying mechanism comprises a supporting rod and a spraying assembly, the spraying assembly comprises an arc-shaped support pipe and a plurality of nozzles arranged on the inner side of the arc-shaped support pipe, the nozzles are distributed at intervals along the arc face of the inner side of the arc-shaped support pipe, and an outlet of the buffer tank is connected to the inlet ends of the nozzles through a fluid flow divider. The device has the advantages that the double working modes of moving, pushing and pulling and carrying are achieved, meanwhile, the uniformity of the particle size of sprayed liquid drops can be improved, and the foliage spraying quality is improved.

Description

Technical Field

[0001] The invention relates to a spraying device for cigarette raw materials, in particular to a dual-mode small-sized and high-efficiency flue-cured tobacco leaf surface spraying device. Background Art

[0002] As a leaf-based cash crop, flue-cured tobacco not only requires a certain yield but also places high demands on leaf quality. Yield and quality directly impact the economic benefits and enthusiasm of tobacco growers, and they also guarantee the stability of industrial raw materials. Research to improve tobacco yield and quality is progressing across a variety of approaches, from regulating tobacco plant growth and development with soil nutrients to regulating production and development with foliar spraying. Foliar spraying, due to its rapid and immediate effects, is increasingly being used in tobacco production. For example, problems such as excessive nitrogen absorption leading to slow yellowing during maturity, prolonged growth, accelerated growth, and reduced leaf quality remain common. The reasons for this phenomenon are complex and closely related to field water and fertilizer conditions, as well as ecological conditions. In particular, the upper leaves, which account for 30% to 40% of the total plant yield, are increasingly demanding in terms of maturity and quality as their proportion in cigarette blends increases. Focusing on the more mature products that currently improve the quality of tobacco leaves, especially the maturity of upper tobacco leaves, the main method is foliar spraying. The regulated products are evenly sprayed onto the surface of the tobacco leaves through a sprayer, entering the interior of the leaves through the stomata to promote the transformation of internal substances and achieve the goal of mature tobacco field technology.

[0003] Current devices used for foliar tobacco spraying in the field primarily include knapsack sprayers, self-propelled sprayers, towed sprayers, foggers, agricultural inorganic sprayers, and new environmentally friendly sprayers. Knapsack sprayers, with their reasonable volume and weight, better suit current production practices and field conditions. As essential spraying devices for growers, they enjoy the highest household penetration and widest application compared to other types. However, when using knapsack sprayers for foliar application of controlled products in the field, the large droplet size range (generally between 100 and 400 μm) can lead to uneven application, resulting in uneven chlorosis and yellowing of leaves, resulting in patches of yellow and green. Furthermore, overly large droplets not only impair leaf absorption but can also easily cause sunburn. Experiments have found that uneven leaf color and burns can lead to large areas of color variation in tobacco leaves after curing, which not only fails to improve tobacco quality but actually degrades it. Tests have shown that these controlled spray products require high droplet size uniformity, which is difficult to achieve with current knapsack sprayers. Furthermore, a full knapsack sprayer places a heavy load on the operator. Field operations require spraying a single leaf in at least four directions: upward, diagonally, and downward. For controlled spray applications, even higher uniformity is required, resulting in increased labor intensity and lengthy operations.

[0004] Currently, the types of machinery used to reduce labor intensity include self-propelled and towed sprayers, primarily mobile plant protection sprayers. These large sprayers are suitable for large-scale operations, but lack operational flexibility. Their large size reduces the spacing between tobacco plants in tobacco fields, especially in the later stages of growth and development, leading to high levels of mechanical damage to leaves during field operations. This makes them less suitable for smaller plots. Intelligent spraying devices can replace manual labor, but the high production and maintenance costs of these devices currently hinder their widespread adoption in production.

[0005] Existing research on optimizing droplet size primarily focuses on optimizing nozzles and installing intelligent control systems. Among these, Chinese patent publication number CN218360031U proposes a plant protection fogger nozzle that generates rotation through spiral blades inside the nozzle, mixing the fog and liquid pesticide before outputting it. It utilizes multiple spherical nozzles, which can be adjusted through 360-degree rotation to achieve uniform multi-directional pesticide spraying, addressing the uneven coverage problem of one-way nozzles. Patent application publication number CN221183241U proposes an oscillating, self-rotating spraying device. This device incorporates a water tank within a fixed box, with oscillating head assemblies mounted on each tank, primarily for automatically adjusting the spray angle and range. Patent publication number CN111346751A proposes a magnetoelectric, low-voltage, electrostatic ultrasonic atomizing nozzle. By integrating ultrasonic atomization, electrostatic adsorption, and magnetization technologies, it addresses the issues of traditional spray liquid migration and low adhesion, making it suitable for high-pole operations in fields and orchards.

[0006] The above-mentioned types of spray devices only solve the current problem of uneven foliage spraying from a single perspective, but their defects are also obvious: machines with better atomization effects are relatively large in size and heavy in weight, and need to be loaded or towed for operation. They have high space requirements for field operations and are more suitable for large-scale tobacco field operations; while small and convenient operation machines, especially the currently commonly used backpack spray devices, are affected by performance and the spray effect does not meet the technical standard requirements. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a dual-mode small-scale high-efficiency tobacco leaf spraying device, which can realize dual working modes of mobile push-pull and backpack, and at the same time improve the uniformity of the spray droplet particle size and enhance the quality of leaf spraying.

[0008] The present invention is achieved through the following technical solutions: A dual-mode small-sized high-efficiency flue-cured tobacco leaf spraying device comprises a supporting movable frame on which a liquid tank, a diaphragm pump and a spraying mechanism are arranged; A shoulder strap is provided on one side of the liquid tank, and a liquid holding chamber for holding liquid is provided inside the liquid tank; a rotating stirring mechanism for stirring the liquid is provided in the liquid holding chamber, a diaphragm pump and a buffer tank are installed on the supporting mobile frame, a liquid outlet at the bottom of the liquid holding chamber is connected to the inlet of the diaphragm pump through a pipe, the outlet of the diaphragm pump is connected to the inlet of the buffer tank through a pipe, and the outlet of the buffer tank is connected to the spraying mechanism through a pipe; The spraying mechanism includes a support rod and a spraying assembly installed on the support rod. The spraying assembly includes an arc-shaped support tube and multiple nozzles arranged on the inner side of the arc-shaped support tube. The multiple nozzles are distributed at intervals along the arc surface inside the arc-shaped support tube. The outlet of the buffer tank is connected to the inlet of the fluid diverter, and the multiple outlets of the fluid diverter are respectively connected to the inlet ends of multiple nozzles.

[0009] As a preferred embodiment of the dual-mode small-scale high-efficiency flue-cured tobacco leaf spraying device, the fluid diverter includes a diverter housing and a valve body mounted on a support rod, a diverter chamber is provided inside the separation housing, and the diverter chamber is composed of an inlet section, a rectifying section, and a buffer guide section from bottom to top; The inlet section consists of an inlet interface and a conical diffuser cavity. A filter is provided inside the inlet interface. The conical diffuser cavity is a conical cavity with a larger bottom and a smaller top. The rectifying section is composed of an inverted cone rectifying cavity and a rectifying outlet cavity. The inverted cone rectifying cavity is a small in the bottom and large in the top. A rectifying grid is provided at the bottom of the rectifying outlet cavity. The buffer guide section includes a conical buffer guide cavity, which is a conical cavity that is larger at the bottom and smaller at the top. Multiple levels of honeycomb guide plates are sequentially arranged in the conical buffer guide cavity from bottom to top. The cavities between adjacent honeycomb guide plates form buffer cavities at each level. The inner walls of each level of the buffer cavity are evenly spaced along the circumference with a number of guide ribs. The outer ends of the guide ribs are arranged on the inner wall of the buffer cavity, and the inner ends extend obliquely upward. Multiple guide holes are distributed on each honeycomb guide plate. From bottom to top, the number of guide holes on the multi-level honeycomb guide plates gradually decreases. The guide holes on the honeycomb guide plate on the top layer are evenly spaced along the circumference of the honeycomb guide plate, and the number of guide holes on the honeycomb guide plate on the top layer is the same as the number of nozzles of the spraying mechanism. The valve body is fixedly installed on the top of the diversion shell, and multiple solenoid valves are evenly distributed along the circumferential interval on the valve body. The inlets of the multiple solenoid valves are sealed and docked with the guide holes on the honeycomb guide plate on the top layer of the buffer guide section. The outlets of the multiple solenoid valves are respectively connected to the hose branches, and the multiple hose branches serve as multiple outlets of the fluid diverter.

[0010] As a preferred embodiment of the dual-mode small-scale high-efficiency flue-cured tobacco leaf spraying device, a central hub is further provided between the fluid diverter and the multiple nozzles, the central hub comprising a hub shell mounted on a support rod, a central hub component provided inside the hub shell, and the central hub component comprising a stationary portion, a transition portion, and a conversion portion connected in sequence; The stationary part includes a flange base and a stationary base that are fixedly connected. The stationary base is in the shape of a semi-disc. The arc surface of the stationary base serves as the inlet end and the chord surface serves as the outlet end. A plurality of preliminary reversing flow channels are provided inside the stationary base. The two ends of each preliminary reversing flow channel respectively penetrate the arc surface and the chord surface of the stationary base and serve as the inlet end and the outlet end. With the middle preliminary reversing flow channel as the reference, the outlet ends of the several preliminary reversing flow channels on both sides are respectively inclined to extend outwards. The outlet ends of the multiple preliminary reversing flow channels are spaced along the diameter direction on the chord surface of the stationary base. Multiple water outlets are evenly spaced apart, and the inlet ends of the multiple preliminary reversing flow channels are evenly spaced along the arc surface of the stationary base to form multiple water inlets; the flange base is provided with multiple parallel inlet flow channels, and the outlet end of the flange base is an arc surface that matches the inlet end of the stationary base. The outlet ends of the multiple inlet flow channels on the flange base are sealed and docked with the water inlets of the multiple preliminary reversing flow channels on the stationary base in a one-to-one correspondence, and the inlet ends of the multiple inlet flow channels on the flange base are sealed and docked with the multiple hose branches of the fluid diverter in a one-to-one correspondence; The transition portion includes a plurality of transition ducts, each of which includes a conical section and a cylindrical section. The small end of the conical section of the transition duct serves as a transition inlet end. The transition inlet ends of the plurality of transition ducts are sealed and docked with the outlets of the plurality of preliminary reversing flow channels on the stationary base in a one-to-one correspondence. The plurality of transition ducts are respectively aligned with the extension direction of the plurality of preliminary reversing flow channels. The conversion part includes multiple conversion pipes, each conversion pipe is composed of an inlet straight pipe section, a curved pipe section and an outlet straight pipe section that are connected. The inner cavity of the inlet straight pipe section includes a pressure-stabilizing section, a straight cavity transition section and a diversion section arranged in sequence along the water flow direction. The pressure-stabilizing section and the diversion section are both conical cavities, and the big end of the pressure-stabilizing section and the big end of the diversion section are respectively connected to the two ends of the straight cavity transition section. A diversion cone is provided in the straight cavity transition section and the diversion section. The diversion cone includes an upper and a lower cone. The big end ends of the upper and lower cones of the diversion cone are connected. The gap between the outer wall of the upper cone and the inner cavity wall of the diversion section forms an annular diversion channel. The lower cone is located in the straight cavity transition section and is provided with multiple laminar plates at the bottom. The ends of the outlet straight pipe sections of the multiple conversion pipes of the conversion part are respectively connected to the multiple nozzle inlets through bellows in a one-to-one correspondence.

[0011] As a preferred embodiment of the dual-mode small-scale high-efficiency tobacco leaf spraying device, the preliminary reversing flow channel is a Venturi flow channel.

[0012] As a preferred solution of the above-mentioned dual-mode small-scale high-efficiency flue-cured tobacco foliar spraying device, the supporting mobile frame includes a mobile frame with mobile rollers at the bottom, and two front and rear support tables are slidingly arranged on the mobile frame. The support tables can slide back and forth on the mobile frame and can be locked by a locking structure. The liquid tank is supported by the two support tables, and a front baffle extending vertically upward is provided on the front side of the mobile frame. A push-pull handle is provided on the top of the front baffle. Two mounting brackets are installed on the front side of the front baffle, which are used to install a diaphragm pump and a buffer tank respectively. A fixing card for fixing the support rod is also provided on the front side of the front baffle.

[0013] As a preferred embodiment of the dual-mode small-scale high-efficiency tobacco leaf spraying device, a liquid inlet communicating with the liquid holding chamber is provided on the top of the liquid tank, a filter is provided at the liquid inlet, and the liquid inlet is sealed by an openable and closable liquid inlet cover.

[0014] As a preferred embodiment of the dual-mode small-scale high-efficiency tobacco leaf spraying device, in the spraying mechanism, five nozzles are provided on the inner side of the arc-shaped support tube.

[0015] Compared with the prior art, the present invention has the following advantages: This invention provides a small, high-efficiency, dual-mode flue-cured tobacco leaf spraying device. Aiming to achieve optimal atomization for tobacco leaves, the device aims to narrow the droplet size range. This device breaks away from the single atomization method used in conventional production models. By utilizing a diaphragm pump and a matching buffer tank, it achieves a droplet size range of 150 μm. The addition of a fluid splitter and a central hub ensures uniform droplet size in multi-nozzle operation. Furthermore, a rotary stirring mechanism further enhances the uniformity of the sprayed liquid concentration.

[0016] 2. The present invention provides a dual-mode, small, and efficient tobacco leaf spraying device. While achieving the goal of spray atomization particle size and ensuring performance, it uses lightweight components as much as possible to minimize the weight of the tank and supporting mobile frame. At the same time, a supporting mobile frame is added to achieve dual-mode operation, which can be carried on the back or pushed and pulled, so that users can choose as needed, greatly reducing labor intensity. The added atomizing components add a certain amount of weight. By adding a lightweight mobile device, the mobile push-pull method can be used when the weight of the liquid tank and the liquid inside is large, and the backpack operation can be used when the weight of the liquid tank and the liquid inside is small. The two operation modes can be flexibly switched, and the scope of applicable labor subjects is wider. At the same time, the two operation modes also bring great operational flexibility, applicable to various terrain and landform operation conditions, and more extensive application.

[0017] 3、 The application provides a kind of dual-mode small high-efficiency tobacco leaf surface spraying device, by overcoming the problem that existing small spraying device is difficult to realize multiple nozzle operation, design multiple nozzle semicircular arc arrangement, the coverage of spray surface is wider, reduces the operation angle, improves the operation efficiency.The device improves the operation quality and operation efficiency by improving performance, maintains the size of commonly used machine type and the flexibility of field operation, not only can be used for tobacco production, other field crops can be applied, the application scenario is widely, the applicability is further improved, it is conducive to market promotion. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the application.

[0019] Figure 2 It is the liquid tank structure schematic diagram of the application.

[0020] Figure 3 It is the support moving frame structure schematic diagram of the application.

[0021] Figure 4 It is the spraying mechanism structure schematic diagram of the application.

[0022] Figure 5 It is the split diagram of the fluid flow divider and center concentrator of the application.

[0023] Figure 6 It is the first level honeycomb guide plate plan view of the application.

[0024] Figure 7 It is the second level honeycomb guide plate plan view of the application.

[0025] Figure 8 It is the third level honeycomb guide plate plan view of the application.

[0026] Figure 9 It is the center concentrator structure schematic diagram of the application.

[0027] Figure 10 It is the static part structure schematic diagram of the application.

[0028] Figure 11 It is the transition part structure schematic diagram of the application.

[0029] Figure 12 It is the conversion part structure schematic diagram of the application.

[0030] Reference numerals in the figure: 1 supporting mobile frame; 2 liquid tank; 3 diaphragm pump; 4 spraying mechanism; 5 moving roller; 6 moving frame; 7 supporting table; 8 locking hole; 9 front baffle; 10 push-pull handle; 11 mounting bracket; 12 buffer tank; 13 sleeve; 14 fixing card; 15 carrying shoulder strap; 16 liquid holding chamber; 17 liquid inlet; 18 lower space; 19 support rod; 20 handle operation section; 21 support mounting section; 22 arc-shaped bracket pipe; 23 nozzle; 24 high-pressure hose; 25 diverter shell; 26 valve body; 27 inlet interface; 28 conical diffuser chamber; 29 conical rectifier chamber; 30 rectifier outlet chamber; 31 Rectifier grid; 32 guide hole; 33 first-stage honeycomb guide plate; 34 second-stage honeycomb guide plate; 35 third-stage honeycomb guide plate; 36 quick-connect connector; 37 hose branch; 38 central hub; 39 hub shell; 40 static part; 41 transition part; 42 conversion part; 43 flange base; 44 static base; 45 preliminary reversing flow channel; 46 inlet flow channel; 47 transition pipe; 48 inlet straight pipe section; 49 elbow section; 50 outlet straight pipe section; 51 pressure stabilizing section; 52 straight cavity transition section; 53 guide section; 54 guide cone; 55 laminar plate; 56 radial ribs; 57 first-stage buffer cavity; 58 second-stage buffer cavity. DETAILED DESCRIPTION

[0031] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0032] See also Figures 1 to 12 This embodiment discloses a dual-mode small-scale high-efficiency tobacco leaf spraying device, including a supporting mobile frame 1, on which a liquid tank 2, a diaphragm pump 3 and a spraying mechanism 4 are provided.

[0033] The support mobile frame 1 comprises a mobile frame 6 provided with four mobile wheels 5 at the bottom, the mobile frame 6 is a frame formed by transverse and longitudinal welding of light aluminum alloy strips, two front and rear support table surfaces 7 are slidably arranged on the mobile frame 6, the support table surfaces 7 can slide forward and backward on the mobile frame 6 and can be locked by a locking structure, the liquid tank 2 is supported by the two support table surfaces 7. The light aluminum alloy strips on the left and right sides of the mobile frame 6 serve as guide rails, the left and right sides of the support table surfaces 7 are respectively slidably sleeved on the guide rails on the left and right sides of the mobile frame 6 and can slide forward and backward, the locking structure can be locked by locking pins, the locking pins pass through the sleeves 13 of the support table surfaces 7 and are inserted into different locking holes 8 on the guide rails, thereby achieving locking installation of the support table surfaces 7 at different positions on the guide rails. When the liquid tank 2 needs to be supported, the front and rear support table surfaces 7 are pulled apart in the forward and backward directions to support the liquid tank 2; when the liquid tank 2 does not need to be supported, the front and rear support table surfaces 7 can be moved close to each other, thereby saving space. The front side of the mobile frame 6 is provided with a front baffle 9 extending vertically upward, the top of the front baffle 9 is provided with a push-pull handle 10, which facilitates push-pull movement of the entire device; the front side of the front baffle 9 is provided with two mounting brackets 11 for mounting the diaphragm pump 3 and the buffer tank 12, respectively, and is also provided with a fixing clamp 14 for fixing a support rod 19.

[0034] The liquid tank 2 is made of PP material, with a wall thickness of 2.5±0.2 mm. The liquid tank 2 is detachably installed on the mobile frame 6 by screw connection. The liquid tank 2 is provided with two back shoulder straps 15 on one side, and can be used for back operation. The liquid tank 2 is internally provided with a liquid containing cavity 16 for containing liquid. The volume of the liquid containing cavity 16 is 20L. The liquid tank 2 is provided with a liquid inlet 17 communicating with the liquid containing cavity 16 at the top. A filter screen is arranged at the liquid inlet 17, with a filter aperture of 10-20 meshes for intercepting impurities. The liquid inlet 17 is sealed by an openable and closable liquid inlet cover. The liquid containing cavity 16 is provided with a rotary stirring mechanism for stirring liquid. The rotary stirring mechanism includes a rotary stirring assembly and a rotary driving assembly. The rotary stirring assembly includes a stirring shaft and a plurality of stirring blades arranged on the stirring shaft. The stirring blades are 10 mm away from the bottom of the liquid containing cavity 16 to prevent sedimentation. The rotary driving assembly includes a stirring motor and a battery. The battery is a rechargeable battery, such as a 12V / 22Ah lithium iron phosphate battery, which is used to power the stirring motor, diaphragm pump 3 and other electrical equipment. The stirring motor drives the stirring shaft to rotate, thereby driving the stirring blades to act together, so as to stir the liquid in the liquid containing cavity 16. The rotary driving assembly can be placed in the lower space 18 of the liquid tank 2. The lower space 18 is independent of the liquid containing cavity 16 above. The diaphragm pump 3 and the buffer tank 12 are installed on the front side of the front baffle 9 of the support mobile frame 1. The diaphragm pump 3 is a 12V brushless motor pump, with a flow rate of ≥500mL / min and an outlet pressure of 0.52MPa. The buffer tank 12 has a volume of 0.5-1L, and is internally provided with a rubber airbag pre-charged with nitrogen at 0.3-0.4MPa. The liquid outlet at the bottom of the liquid containing cavity 16 is connected to the inlet of the diaphragm pump 3 by a pipeline. The outlet of the diaphragm pump 3 is connected to the inlet of the buffer tank 12 by a pipeline. The outlet of the buffer tank 12 is connected to the spraying mechanism 4 by a pipeline.

[0035] The spraying mechanism 4 includes a support rod 19 and a spraying assembly mounted on the support rod 19. The support rod 19 includes a handle operating section 20 and a support mounting section 21. The operator performs the spraying operation by holding the handle operating section 20 of the support rod 19. The spraying assembly includes an arc-shaped bracket tube 22 and a plurality of nozzles 23 arranged on the inner side of the arc-shaped bracket tube 22. The arc-shaped bracket tube is fixed to the end of the support mounting section 21 of the support rod 19. The plurality of nozzles 23 are spaced apart along the inner arc surface of the arc-shaped bracket tube 22. In this embodiment, the spraying mechanism 4 Five nozzles 23 are provided on the inside of the arc-shaped support tube 22. These nozzles 23 are fan-shaped atomizing nozzles 23 with a flow rate of 1.04 L / min, an atomized particle size of 150 ± 15 μm, and a spray angle of 80°. They are positioned and installed on the inside of the arc-shaped support tube 22 at central angles of 0°, ±18°, and ±36°. This significantly increases the coverage area of ​​a single spray, improves operational efficiency and uniformity, and achieves highly uniform spraying. In addition to being suitable for precise spraying on the surface of flue-cured tobacco, especially the upper leaves, it is also easily applicable to foliar regulation of other crops and greenhouse environments. The outlet of the buffer tank 12 is connected to the inlet of the fluid diverter, and the multiple outlets of the fluid diverter are respectively connected to the inlet ends of multiple nozzles 23. Specifically, a pressure gauge interface is provided at the outlet of the buffer tank 12 for installing a pressure gauge. The outlet of the pressure gauge is connected to a high-pressure hose 24 through a pressure-stabilizing valve. The working pressure of the pressure-stabilizing valve is 0.1~0.8MPa. The high-pressure hose 24 passes through the internal channel of the handle operating section 20 of the support rod 19. The end of the high-pressure hose 24 passes through the handle operating section 20 and is connected to the inlet of the fluid diverter.

[0036] The fluid diverter includes a diverter shell 25 and a valve body 26 installed on the support mounting section 21 of the support rod 19. A 3mm thick shock-absorbing silicone gasket is installed between the diverter shell 25 and the handle operating section 20 of the support rod 19. A through diverter cavity is provided inside the separation shell. The diverter cavity is composed of an inlet section, a rectifying section, and a buffer guide section from bottom to top.

[0037] The inlet section consists of an inlet port 27 and a conical diffuser 28. The inlet port 27 is connected to the end of the high-pressure hose 24 and contains a filter. The conical diffuser 28 is a tapered cavity with a larger bottom and smaller top. Its inlet diameter is 50 mm, its length is 15 mm, and its outlet diameter is 35 mm. The rectifier section consists of an inverted conical rectifier 29 and a rectifier outlet chamber 30. The inverted conical rectifier 29 is a conical cavity with a smaller bottom and larger top. A rectifier grille 31 is located at the bottom of the rectifier outlet chamber 30. The grid cell size of the rectifier grille 31 is 3 mm x 3 mm, with a 70% porosity and 1.5 mm rib width. The rectifier grille 31 is snap-fitted to the inner wall of the rectifier outlet chamber 30.

[0038] The buffer guide section includes a conical buffer guide cavity, which is a conical cavity that is larger at the bottom and smaller at the top. Multiple levels of honeycomb guide plates are sequentially spaced from bottom to top within the conical buffer guide cavity, with each level of honeycomb guide plates engaging the inner wall of the conical buffer guide cavity. The cavities between adjacent honeycomb guide plates form buffer cavities at various levels, each of which has a plurality of guide ribs spaced evenly along the circumference of the inner wall. The outer ends of the guide ribs are positioned on the inner wall of the buffer cavity, while the inner ends extend obliquely upward. Multiple guide holes 32 are distributed on each honeycomb guide plate. The number of guide holes 32 on the multi-level honeycomb guide plates decreases from bottom to top, with the guide holes 32 on the topmost honeycomb guide plate being evenly spaced along the circumference of the honeycomb guide plate. The number of guide holes 32 on the topmost honeycomb guide plate is the same as the number of nozzles 23 of the spraying mechanism 4. This embodiment includes three levels of honeycomb guide plates: a primary honeycomb guide plate 33, a secondary honeycomb guide plate 34, and a tertiary honeycomb guide plate 35, forming a primary buffer chamber 57 and a secondary buffer chamber 58. The honeycomb guide plates are made of PPS + 40% glass fiber to meet lightweight requirements. The three-level honeycomb guide plates 35 are all designed as regular hexagonal plates with a thickness of 5 mm. The spacing between the primary honeycomb guide plate 33 and the rectifying grid 31 is ≤ 0.5 mm, and the spacing between adjacent honeycomb guide plates is 10 mm. The guide holes 32 on each honeycomb plate have different apertures and arrangements, forming a tapered channel formed by the three-level honeycomb guide plates 35 connected in series. The guide holes 32 on the first-stage honeycomb guide plate 33 have a diameter of 3.0 ± 0.1 mm and are distributed in three circles: the outermost circle has six holes uniformly distributed along the circumference, the middle circle has 12 holes uniformly distributed along the circumference, and the innermost circle has one hole. The guide holes 32 on the second-stage honeycomb guide plate 34 have a diameter of 2.5 ± 0.1 mm and are distributed in two circles: the inner circle has five holes uniformly distributed along the circumference, and the outer circle has seven holes uniformly distributed along the circumference. Liquid swirls after passing through the inner and outer circle channels. The guide holes 32 on the third-stage honeycomb guide plate 35 have a diameter of 2.0 ± 0.1 mm and are distributed in a circle with five holes, providing refined flow distribution. A drain hole is designed in the center of the secondary honeycomb guide plate 34 at the bottom of the secondary buffer chamber 58, and is equipped with a magnetic ball valve. The drain hole is led out of the conical buffer guide chamber through a drain pipe; a 45° inclined hole is set at the top of the side wall of the secondary buffer chamber 58 to discharge bubbles entrained in the fluid.

[0039] The valve body 26 is fixedly installed on the top of the diverter housing 25. A plurality of solenoid valves are evenly distributed along the circumferential direction on the valve body 26. In this embodiment, there are five solenoid valves, forming a five-way solenoid valve. The inlet of the five-way solenoid valve is sealed and docked with the guide hole 32 on the honeycomb guide plate on the top layer of the buffer guide section in a one-to-one correspondence. The outlet of the five-way solenoid valve is respectively connected to the hose branch 37 through the quick-plug connector 36. The multiple hose branches 37 serve as multiple outlets of the fluid diverter.

[0040] In the fluid diverter, the liquid in the high-pressure hose 24 first enters the conical diffuser 28 through the inlet interface 27. The cross-sectional area of ​​the conical diffuser 28 gradually decreases, reducing the liquid flow rate. The liquid then enters the rectifying section, where the inverted conical rectifying chamber 29 and the rectifying grid 31 balance the flow resistance and turbulence. The liquid then enters the buffer guide section. In the conical buffer guide chamber, the honeycomb guide plate forces the liquid flow direction to change direction. The guide ribs in the two-stage buffer chamber transform the disordered turbulence into a swirl, improving the uniformity of the inflow to the next-stage honeycomb guide plate 33. After passing through the buffer guide section, the liquid flows through the five guide holes 32 on the third-stage honeycomb guide plate 35 into the five solenoid valves in the valve body 26, and then flows out evenly through the five hose branches 37 and into the central hub 38.

[0041] A central hub 38 is also provided between the fluid diverter and the multiple nozzles 23. The central hub 38 includes a hub shell 39 installed on the support mounting section 21 of the support rod 19. A central hub component is provided inside the hub shell 39. The central hub component includes a stationary part 40, a transition part 41 and a conversion part 42 connected in sequence.

[0042] The stationary portion 40 includes a flange base 43 and a stationary base 44 that are fixedly connected. The stationary base 44 is semi-disc-shaped. The arc surface of the stationary base 44 serves as the inlet end and the chord surface serves as the outlet end. A plurality of preliminary reversing flow channels 45 are provided inside the stationary base 44. The preliminary reversing flow channels 45 are Venturi flow channels. The two ends of each preliminary reversing flow channel 45 respectively pass through the arc surface and the chord surface of the stationary base 44 and serve as the inlet end and the outlet end. With the middle preliminary reversing flow channel 45 as the reference, the outlet ends of the several preliminary reversing flow channels 45 on both sides are respectively inclined outwardly extended, and the outlet ends of the plurality of preliminary reversing flow channels 45 are on the chord surface of the stationary base 44. Multiple water outlets are evenly spaced along the diameter direction, and the inlet ends of the multiple preliminary reversing flow channels 45 are evenly spaced along the arc surface of the stationary base 44 to form multiple water inlets; a plurality of parallel inlet flow channels 46 are provided on the flange base 43, and the outlet end of the flange base 43 is an arc surface that matches the inlet end of the stationary base 44. The outlet ends of the multiple inlet flow channels 46 on the flange base 43 are sealed and docked with the water inlets of the multiple preliminary reversing flow channels 45 on the stationary base 44 in a one-to-one correspondence, and the inlet ends of the multiple inlet flow channels 46 on the flange base 43 are sealed and docked with the multiple hose branches 37 of the fluid diverter in a one-to-one correspondence.

[0043] The transition portion 41 includes multiple transition pipes 47, each transition pipe 47 includes a conical section and a cylindrical section, and the small mouth end of the conical section of the transition pipe 47 serves as the transition inlet end. The transition inlet ends of the multiple transition pipes 47 are sealed and docked with the water outlets of the multiple preliminary reversing flow channels 45 on the stationary base 44 in a one-to-one correspondence, and the multiple transition pipes 47 are respectively consistent with the extension direction of the multiple preliminary reversing flow channels 45.

[0044] The conversion section 42 includes a plurality of conversion pipes, each of which is composed of an inlet straight pipe section 48, a curved pipe section 49 and an outlet straight pipe section 50 connected to each other. The inner cavity of the inlet straight pipe section 48 includes a pressure stabilizing section 51, a straight cavity transition section 52, and a diversion section 53 arranged in sequence along the direction of water flow. The pressure stabilizing section 51 and the diversion section 53 are both conical cavities, and the large end of the pressure stabilizing section 51 and the large end of the diversion section 53 are respectively connected to the two ends of the straight cavity transition section 52. A diversion cone 54 is provided in the straight cavity transition section 52 and the diversion section 53. The diversion cone 54 is provided in the diversion cone 53. The outer periphery is welded to the inner wall of the straight cavity transition section 52 via radial ribs 56 distributed at intervals. The guide cone 54 includes an upper and a lower cone. The large ends of the upper and lower cones of the guide cone 54 are connected. The gap between the outer wall of the upper cone and the inner wall of the guide section 53 forms an annular guide channel. The lower cone is located in the straight cavity transition section 52 and has multiple laminar plates 55 at the bottom. The ends of the outlet straight pipe sections 50 of the multiple conversion pipes of the conversion part 42 are respectively connected to the inlets of the multiple nozzles 23 through bellows.

[0045] In the central hub 38, the liquid sequentially passes through the stationary portion 40, the transition portion 41, and the conversion portion 42. Specifically, the liquid in the five hose branches 37 enters the five inlet channels 46 of the flange base 43, the five preliminary reversing channels 45 of the stationary base 44, the five transition pipes 47, and the five conversion pipes in a one-to-one correspondence. Finally, it flows into the five nozzles 23 through the outlet straight pipe sections 50 of the five conversion pipes and is ejected through the five nozzles 23. The five preliminary reversing channels 45 of the stationary portion 40 primarily change the direction of the vertically flowing liquid, then complete the change in direction through the five transition pipes 47 of the transition portion 41. Finally, the five conversion pipes of the conversion portion 42 complete the conversion from vertical to horizontal flow. In each conversion pipe, the inner cavity of the inlet straight pipe section 48 acts as a pressure stabilizer and flow guide to ensure uniform flow velocity during subsequent diversion.

[0046] The working process of the dual-mode small-scale high-efficiency tobacco leaf spraying device provided in this embodiment is as follows: First, the liquid to be sprayed is poured into the liquid container cavity 16 of the liquid tank 2 through the liquid inlet 17, and the impurities are intercepted and preliminarily filtered by the filter screen, and then the liquid cover is closed. Start the rotating stirring mechanism to stir the liquid, start the diaphragm pump 3, and the uniformly mixed liquid is pumped into the buffer tank 12 through the liquid outlet, then enters the high-pressure hose 24 through the pressure stabilizing valve and pressure gauge, enters the fluid flow divider through the high-pressure hose 24, and is evenly distributed to the five hose branch pipes 37, then the five-way liquid is sent to the five nozzles 23 through the central hub 38, the fluid atomization particle size is 150um, and the liquid is evenly distributed to the blade surface to complete the leaf surface spraying process.

[0047] Because of the advantages of freedom and convenience, the backpack type is still the main working mode of the current spraying device, but the liquid particle size sprayed by the current spraying device is too coarse and the uniformity is poor. The embodiment designs a spraying device containing two working modes. The device can be moved and pushed for operation as needed, and can also be used for backpack operation, and at the same time solves the problem of the liquid particle size sprayed by the existing spraying device being too coarse and the uniformity being poor. When the liquid amount in the liquid container cavity 16 of the liquid tank 2 is large and the weight of the device is heavy, the moving and pushing operation can be selected. At this time, the device is moved by pushing the hand-pulled handle 10, and the moving roller 5 is matched to realize the easy, labor-saving, convenient and flexible movement of the device. When the liquid amount in the liquid container cavity 16 of the liquid tank 2 is small and the weight of the device is light, the entire device can be directly backpacked through the two backpack shoulder straps 15 on one side of the liquid tank 2.

[0048] The embodiment improves the commonly used knapsack spraying device in production, retains its convenience features, and first solves the problems of too large atomization particle size range, uneven blade adhesion, poor product absorption and utilization effect, and thus affects the quality of tobacco leaves. Five groups of nozzles 23 are used, each nozzle 23 sprays uniformly, and the droplet size is about 150 um. Around this goal, the diaphragm pump 3 and the buffer tank 12 matched therewith are selected, the fluid diverter is designed, the rotary stirring mechanism is installed at the bottom of the liquid tank 2, the fluid is mixed and then enters the diaphragm pump 3, the pump enters the buffer tank 12 for preliminary regulation and control, then enters the fluid diverter through the pressure stabilizing valve, the fluid is evenly distributed to the five soft pipe branches 37, enters the five nozzles 23 through the central concentrator 38, and completes the fluid atomization spraying process. At the same time, by designing the spraying assembly into a circular arc support pipe 22 and setting five nozzles 23 on the inner side of the circular arc support pipe 22, the fluid ejection surface is expanded, and the operation time is reduced. The semi-circular arc-shaped nozzle head is integrated, which first meets the requirements of the atomization particle size, and the fluid diverter and the central concentrator 38 solve the production requirements of the same spraying amount and droplet size of the five nozzles 23. In addition, in order to reduce the high labor intensity of full tank knapsack operation, the support moving frame 1 is set, so that the device not only provides reinforcement and support for the liquid tank 2, but also adopts a push-pull lightweight design, which can be knapsacked, pushed and pulled for field operation, greatly reduces the labor intensity, and meets the current production habits and field block applicability requirements. Thus, the production purposes of reducing work and cost, improving quality and increasing efficiency are achieved.

[0049] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dual-mode small-sized high-efficiency tobacco leaf spraying device, characterized by: It comprises a supporting mobile frame (1), on which a liquid tank (2), a diaphragm pump (3) and a spraying mechanism (4) are provided; A shoulder strap (15) is provided on one side of the liquid tank (2), and a liquid holding chamber (16) for holding liquid is provided inside the liquid tank (2); a rotating stirring mechanism for stirring the liquid is provided in the liquid holding chamber (16), a diaphragm pump (3) and a buffer tank (12) are installed on the supporting mobile frame (1), a liquid outlet at the bottom of the liquid holding chamber (16) is connected to the inlet of the diaphragm pump (3) through a pipeline, the outlet of the diaphragm pump (3) is connected to the inlet of the buffer tank (12) through a pipeline, and the outlet of the buffer tank (12) is connected to the spraying mechanism (4) through a pipeline; The spraying mechanism (4) includes a support rod (19) and a spraying assembly mounted on the support rod (19), the spraying assembly including an arc-shaped support tube (22) and a plurality of nozzles (23) arranged on the inner side of the arc-shaped support tube (22), the plurality of nozzles (23) being distributed at intervals along the inner arc surface of the arc-shaped support tube (22), the outlet of the buffer tank (12) being connected to the inlet of the fluid diverter, and the plurality of outlets of the fluid diverter being respectively connected to the inlet ends of the plurality of nozzles (23).

2. The dual-mode small-sized high-efficiency tobacco leaf spraying device according to claim 1, characterized in that: The fluid diverter comprises a diverter housing (25) and a valve body (26) mounted on a support rod (19); a diverter cavity is provided inside the diverter housing, and the diverter cavity is composed of an inlet section, a rectifying section, and a buffer guide section in order from bottom to top; The inlet section is composed of an inlet interface (27) and a conical pressure diffusion cavity (28). A filter is provided in the inlet interface (27). The conical pressure diffusion cavity (28) is a conical cavity with a larger bottom and a smaller top. The rectifying section is composed of an inverted conical rectifying cavity (29) and a rectifying outlet cavity (30). The inverted conical rectifying cavity (29) is an inverted conical cavity with a smaller bottom and a larger top. A rectifying grid (31) is provided at the bottom of the rectifying outlet cavity (30). The buffer guide section includes a conical buffer guide cavity, which is a conical cavity with a larger bottom and a smaller top. Multiple levels of honeycomb guide plates are sequentially arranged in the conical buffer guide cavity from bottom to top. The cavities between adjacent honeycomb guide plates form buffer cavities at each level. The inner walls of the buffer cavities at each level are evenly distributed with a number of guide ribs at intervals along the circumference. The outer ends of the guide ribs are arranged on the inner wall of the buffer cavity, and the inner ends extend obliquely upward. A plurality of guide holes (32) are distributed on each honeycomb guide plate. From bottom to top, the number of guide holes (32) on the multi-level honeycomb guide plates gradually decreases. The guide holes (32) on the honeycomb guide plate at the top layer are evenly distributed along the circumference of the honeycomb guide plate, and the number of guide holes (32) on the honeycomb guide plate at the top layer is the same as the number of nozzles (23) of the spraying mechanism (4). The valve body (26) is fixedly mounted on the top of the diversion housing (25). A plurality of solenoid valves are evenly spaced along the circumference of the valve body (26). The inlets of the plurality of solenoid valves are sealed and docked with the diversion holes (32) on the honeycomb diversion plate on the top layer of the buffer diversion section. The outlets of the plurality of solenoid valves are respectively connected to the hose branches (37). The plurality of hose branches (37) serve as multiple outlets of the fluid diverter.

3. The dual-mode small-sized high-efficiency tobacco leaf spraying device according to claim 2, characterized in that: A central hub (38) is further provided between the fluid diverter and the plurality of nozzles (23), the central hub (38) comprising a hub housing (39) mounted on the support rod (19), a central hub component being provided inside the hub housing (39), and the central hub component comprising a stationary portion (40), a transition portion (41), and a conversion portion (42) connected in sequence; The stationary portion (40) includes a flange base (43) and a stationary base (44) that are fixedly connected. The stationary base (44) is in the shape of a semi-disc. The arc surface of the stationary base (44) serves as the inlet end and the chord surface serves as the outlet end. A plurality of preliminary reversing flow channels (45) are provided inside the stationary base (44). The two ends of each preliminary reversing flow channel (45) respectively penetrate the arc surface and the chord surface of the stationary base (44) and serve as the inlet end and the outlet end. With the middle preliminary reversing flow channel (45) as a reference, the outlet ends of the plurality of preliminary reversing flow channels (45) located on both sides are respectively inclined to extend outwards. The outlet ends of the plurality of preliminary reversing flow channels (45) are spaced apart along the diameter direction on the chord surface of the stationary base (44). Multiple water outlets are evenly spaced apart, and the inlet ends of the multiple preliminary reversing flow channels (45) are evenly spaced along the arc surface on the static base (44) to form multiple water inlets; a plurality of parallel inlet flow channels (46) are provided on the flange base (43), and the outlet end of the flange base (43) is an arc surface that matches the inlet end of the static base (44); the outlet ends of the multiple inlet flow channels (46) on the flange base (43) are sealed and docked with the water inlets of the multiple preliminary reversing flow channels (45) on the static base (44) in a one-to-one correspondence; and the inlet ends of the multiple inlet flow channels (46) on the flange base (43) are sealed and docked with the multiple hose branches (37) of the fluid diverter in a one-to-one correspondence; The transition portion (41) includes a plurality of transition pipes (47), each transition pipe (47) includes a conical section and a cylindrical section, the small end of the conical section of the transition pipe (47) serves as a transition inlet end, the transition inlet ends of the plurality of transition pipes (47) are sealed and docked with the outlets of the plurality of preliminary reversing flow channels (45) on the stationary base (44) in a one-to-one correspondence, and the extension directions of the plurality of transition pipes (47) are respectively consistent with the extension directions of the plurality of preliminary reversing flow channels (45); The conversion portion (42) includes a plurality of conversion pipes, each of which is composed of an inlet straight pipe section (48), a curved pipe section (49) and an outlet straight pipe section (50) connected to each other. The inner cavity of the inlet straight pipe section (48) includes a pressure stabilizing section (51), a straight cavity transition section (52), and a diversion section (53) arranged in sequence along the water flow direction. The pressure stabilizing section (51) and the diversion section (53) are both tapered cavities, and the large end of the pressure stabilizing section (51) and the large end of the diversion section (53) are respectively connected to the two ends of the straight cavity transition section (52). The straight cavity transition section (5 2) and a guide cone (54) is provided in the guide section (53), the guide cone (54) includes an upper and a lower cone, the large ends of the upper and lower cones of the guide cone (54) are connected, the gap between the outer wall of the upper cone and the inner wall of the guide section (53) forms an annular guide channel, the lower cone is located in the straight cavity transition section (52) and a plurality of laminar plates (55) are provided at the bottom, and the ends of the outlet straight pipe sections (50) of the plurality of conversion pipes of the conversion part (42) are respectively connected to the inlets of the plurality of nozzles (23) through bellows.

4. The dual-mode small-sized high-efficiency tobacco leaf spraying device according to claim 3, characterized in that: The preliminary reversing flow channel (45) is a Venturi flow channel.

5. The dual-mode small-sized high-efficiency tobacco leaf spraying device according to claim 1, characterized in that: The supporting mobile frame (1) includes a mobile frame (6) with a mobile roller (5) at the bottom, and two front and rear support tables (7) are slidably provided on the mobile frame (6). The support tables (7) can slide back and forth on the mobile frame (6) and can be locked by a locking structure. The liquid tank (2) is supported by the two support tables (7). A front baffle (9) extending vertically upward is provided on the front side of the mobile frame (6), and a push-pull handle (10) is provided on the top of the front baffle (9). Two mounting brackets (11) are installed on the front side of the front baffle (9), which are used to install a diaphragm pump (3) and a buffer tank (12) respectively. A fixing card (14) for fixing the support rod (19) is also provided on the front side of the front baffle (9).

6. The dual-mode small-sized high-efficiency tobacco leaf spraying device according to claim 1, characterized in that: The top of the liquid tank (2) is provided with a liquid inlet (17) connected to the liquid containing chamber (16); a filter is provided at the liquid inlet (17); and the liquid inlet (17) is sealed by an openable and closable liquid inlet cover.

7. The dual-mode small-sized high-efficiency tobacco leaf spraying device according to claim 1, characterized in that: In the spraying mechanism (4), five nozzles (23) are provided on the inner side of the arc-shaped support tube (22).

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