Garden pesticide sprayer with metering function

Abstract

The utility model provides a kind of garden pesticide sprayer with metering function, it is related to agricultural equipment technical field, and it includes: medicine box;The back lower end of the medicine box is vertically fixed and installed measuring cylinder, the bottom of measuring cylinder is connected with liquid inlet pipe and liquid outlet pipe respectively, the other end of liquid inlet pipe is communicated with the inner chamber of medicine box, the other end of liquid outlet pipe is connected with medicine pump, and the outlet pipe of medicine pump is connected with spray gun;Liquid inlet solenoid valve and liquid outlet solenoid valve are respectively installed on liquid inlet pipe and liquid outlet pipe. By fixing measuring cylinder on medicine box, combining the precise lifting mechanism (including adjusting screw rod, scale plate, scale, scale sight port, scale needle, lifting rod, bottom block, bottom touch button, connecting block and upper touch button) driven by speed reducer to control the accurate stroke of piston disc, and using liquid inlet solenoid valve and liquid outlet solenoid valve to control flow direction, the two functions of accurate volume measurement and pressurized spraying are creatively integrated.

Description

Technical Field

[0001] This utility model relates to the field of agricultural equipment technology, and in particular to a garden pesticide sprayer with metering function. Background Technology

[0002] In horticultural plant protection operations, the accuracy of pesticide spraying is crucial, affecting not only the control effect but also environmental protection and cost control. Traditional backpack or wheeled pesticide sprayers typically rely on external pumps (such as plunger pumps or diaphragm pumps) to provide spraying pressure, with pesticide dosage often achieved through pre-dilution or rough estimation. This approach has significant drawbacks: firstly, external pumps increase equipment cost, weight, and potential for failure; secondly, pre-dilution cannot meet the needs of frequent adjustments to pesticide concentration during operations, while estimation leads to inaccurate dosage, easily resulting in pesticide waste, environmental pollution, or poor control effects. Although some sprayers with metering devices exist, their metering structure is often independent of the pressurization system, making operation complex and difficult to achieve rapid, visual, and repeatable precise setting of the dosage for a single spray. Utility Model Content

[0003] This utility model relates to a garden pesticide sprayer with metering function, which eliminates the need for a traditional external pesticide pump, simplifies the structure, reduces costs, and significantly improves the accuracy and controllability of pesticide application. It is particularly suitable for garden maintenance operations that require precise control of pesticide dosage.

[0004] In a first aspect, this utility model provides a garden pesticide sprayer with metering function, specifically comprising: a pesticide tank; a metering cylinder vertically fixedly installed at the lower back of the pesticide tank, with an inlet pipe and an outlet pipe respectively connected to the bottom two ends of the metering cylinder, the other end of the inlet pipe communicating with the inner cavity of the pesticide tank, and the other end of the outlet pipe connected to a pesticide pump, the outlet pipe of the pesticide pump being connected to a spray gun; an inlet solenoid valve and an outlet solenoid valve respectively installed on the inlet pipe and the outlet pipe; a piston disc provided in the inner cavity of the metering cylinder, with a piston rod vertically provided at the upper end of the piston disc; a lifting frame provided on the side wall of the pesticide tank above the piston rod, and a lifting mechanism provided on the lifting frame for driving the piston rod to move vertically.

[0005] Optionally, the end of the liquid outlet pipe can be directly connected to the spray gun. The pressure of the spray gun comes from the downward thrust of the lifting mechanism on the piston rod and piston disc. At this time, the liquid inlet solenoid valve is closed and the liquid outlet solenoid valve is open.

[0006] Optionally, a vertical viewing window is provided on the outer wall of the measuring cylinder.

[0007] Optionally, a connecting block is vertically fixed at the upper end of the piston rod, and an upper touch button is provided on the top plane of the connecting block. When the upper touch button is triggered, the lifting mechanism resets and rotates.

[0008] Optionally, the lifting mechanism includes a geared motor, an adjusting screw, a scale plate, a scale, a scale viewing port, a scale needle, a lifting rod, a base block, and a bottom contact button. The upper end of the lifting frame is equipped with a geared motor, and a lifting rod is vertically mounted on the lifting frame below the geared motor. The lower end of the lifting rod is rotatably connected to the side wall of the medicine box through the base block. A bottom contact button is provided on the top of the base block. When the bottom contact button is triggered, the lifting mechanism resets and rotates. The connecting block is vertically rotatably connected to the lifting rod. An adjusting screw is vertically rotatably screwed into the lifting frame directly above the piston rod. The lower end of the adjusting screw is vertically aligned with the upper contact button. An inverted "L"-shaped scale plate is rotatably sleeved on the upper end of the adjusting screw. The scale plate has scales on its surface. The scale plate slides vertically through the end of the lifting frame. A scale viewing port is provided on the lifting frame at the position where the scale plate passes through. A scale needle is provided in the scale viewing port. The adjusting screw is used to adjust the amount of medicine that can be drawn into the measuring cylinder.

[0009] This utility model provides a garden pesticide sprayer with metering function, which has the following beneficial effects: This invention creatively integrates precise volumetric metering and pressurized spraying into one device. It fixes the metering cylinder to the medicine tank and combines it with a precision lifting mechanism driven by a geared motor (including an adjusting screw, scale plate, scale, scale viewing window, scale needle, lifting rod, base block, bottom contact button, connecting block, and top contact button) to control the precise stroke of the piston disc. Furthermore, it utilizes inlet and outlet solenoid valves to control the flow direction. Its unique lifting mechanism not only provides downward pressure to drive the liquid spray, but more importantly, through adjustable mechanical limits (adjusting screw sets the stroke) and clear scale indication, it achieves high-precision, visual setting and repeatable control of the amount of liquid sprayed per application. Simultaneously, dual limit switches (top and bottom contact buttons) ensure operational safety. The viewing window provides intuitive liquid level feedback. Ultimately, this device eliminates the need for a traditional external medicine pump, simplifies the structure, reduces costs, and significantly improves the accuracy and controllability of pesticide application, making it particularly suitable for garden maintenance operations requiring precise control of pesticide dosage. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0011] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of the present invention is shown; Figure 2 This utility model illustrates Figure 1 Schematic diagram of the A-section structure; Figure 3 This utility model illustrates Figure 1 Schematic diagram of the B-type amplification section; Figure 4The diagram shows a schematic axial view of the metering cylinder in a partially sectional state according to the present invention.

[0012] List of reference numerals in the attached diagram: 1. Medicine box; 2. Controller; 3. Measuring cylinder; 31. Inlet pipe; 311. Inlet solenoid valve; 32. Outlet pipe; 322. Outlet solenoid valve; 33. Viewing window; 34. Piston rod; 35. Connecting block; 351. Top contact button; 36. Piston disc; 4. Lifting frame; 41. Gear motor; 42. Adjusting screw; 43. Scale plate; 431. Scale; 44. Scale viewing port; 441. Scale needle; 45. Lifting rod; 46. Base block; 461. Bottom contact button; 5. Medicine pump. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Please refer to Figures 1 to 4 : Example 1: This utility model proposes a garden pesticide sprayer with metering function, including: a pesticide tank 1; a metering cylinder 3 is vertically fixedly installed at the lower back of the pesticide tank 1, with an inlet pipe 31 and an outlet pipe 32 connected to the bottom two ends of the metering cylinder 3 respectively, the other end of the inlet pipe 31 communicating with the inner cavity of the pesticide tank 1, and the other end of the outlet pipe 32 connected to a pesticide pump 5, the outlet pipe of the pesticide pump 5 being connected to a spray gun; a controller 2 is fixedly installed on the side wall of the pesticide tank 1; an inlet solenoid valve 311 and an outlet solenoid valve 322 are respectively installed on the inlet pipe 31 and the outlet pipe 32; a piston disc 36 is provided in the inner cavity of the metering cylinder 3, and a piston rod 34 is vertically provided at the upper end of the piston disc 36; a lifting frame 4 is provided on the side wall of the pesticide tank 1 above the piston rod 34, and a lifting mechanism is provided on the lifting frame 4 to drive the piston rod 34 to move vertically.

[0015] The end of the liquid outlet pipe 32 can be directly connected to the spray gun. The pressure of the spray gun comes from the downward thrust of the lifting mechanism on the piston rod 34 and piston disc 36. At this time, the liquid inlet solenoid valve 311 is closed and the liquid outlet solenoid valve 322 is opened.

[0016] The measuring cylinder 3 has a vertical viewing window 33 on its outer wall.

[0017] The piston rod 34 has a connecting block 35 vertically fixed at its upper end. The top plane of the connecting block 35 has an upper touch button 351. When the upper touch button 351 is triggered, the lifting mechanism resets and rotates.

[0018] In Example 2, based on Example 1, the lifting mechanism includes a reduction motor 41, an adjusting screw 42, a scale plate 43, a scale 431, a scale viewing port 44, a scale needle 441, a lifting rod 45, a base block 46, and a bottom contact button 461. The upper end of the lifting frame 4 is equipped with the reduction motor 41. The lifting rod 45 is vertically mounted on the lifting frame 4 below the reduction motor 41. The lower end of the lifting rod 45 is rotatably connected to the side wall of the medicine box 1 via the base block 46. The top of the base block 46 is equipped with a bottom contact button 461. When the bottom contact button 461 is triggered, the lifting mechanism resets and rotates, connecting the block 35 and the lifting rod 45... 5. A vertically rotating connection is made. The lifting frame 4 directly above the piston rod 34 is vertically screwed with an adjusting screw 42. The lower end of the adjusting screw 42 is vertically aligned with the upper touch button 351. The upper end of the adjusting screw 42 is rotatably sleeved with an inverted "L"-shaped scale plate 43. The scale plate 43 has a scale 431 on its surface. The scale plate 43 slides vertically through the end of the lifting frame 4. A scale viewing port 44 is opened on the lifting frame 4 at the position where the scale plate 43 passes through. A scale needle 441 is provided in the scale viewing port 44. The adjusting screw 42 is used to adjust the amount of medicine that can be drawn into the measuring cylinder 3.

[0019] The following provides further explanation and description of the functions and effects of each structure mentioned above, to help those skilled in the art better understand the technical solution: The bottom of the measuring cylinder 3 is connected to an inlet pipe 31 and an outlet pipe 32, respectively. The other end of the inlet pipe 31 is connected to the inner cavity of the medicine tank 1 to introduce the medicine into the measuring cylinder 3; the other end of the outlet pipe 32 is connected to a medicine pump 5 (in this design, the function of the medicine pump 5 is actually replaced by a specific mechanism, as detailed later). The outlet pipe of the medicine pump 5 is then connected to a spray gun to perform spraying operations. In order to accurately control the flow of the medicine, an inlet solenoid valve 311 is installed on the inlet pipe 31, and an outlet solenoid valve 322 is installed on the outlet pipe 32. By controlling the opening and closing of these two valves, the liquid extraction or drainage process of the measuring cylinder 3 can be realized. The measuring cylinder 3 has a piston disc 36 that can slide up and down. Its function is like a movable sealing partition. When it moves upward, it creates a negative pressure in the cylinder to draw in the medicine (at this time, the inlet solenoid valve 311 is open and the outlet solenoid valve 322 is closed). When it moves downward, it applies pressure to the medicine in the cylinder to discharge it (at this time, the inlet solenoid valve 311 is closed and the outlet solenoid valve 322 is open). A piston rod 34 is vertically fixed to the upper end of the piston disc 36. This rod is a key component for transmitting lifting power.

[0020] The power driving the piston disc 36 comes from the lifting frame 4 and its lifting mechanism, which are located above the piston rod 34 and fixed to the side wall of the medicine tank 1. The core function of this lifting mechanism is to drive the piston rod 34 to move precisely vertically, thereby controlling the stroke of the piston disc 36 and ultimately determining the amount of medicine to be drawn and discharged. The lifting mechanism includes several cooperating components: a geared motor 41 serves as the power source, providing controllable rotational power; an adjusting screw 42 is vertically screwed into the lifting frame 4, with its lower end vertically corresponding to the upper contact button 351 located on the top plane of the connecting block 35 fixed to the upper end of the piston rod 34; when the adjusting screw 42 rotates down and touches the upper contact button 351, a signal is triggered to reset the lifting mechanism; the upper end of the adjusting screw 42 is rotatably sleeved with an inverted L-shaped scale plate 43, the surface of which is marked with a scale 431, and it passes through a scale viewing port 44 opened at the end of the lifting frame 4, with a fixed scale needle 441 inside the viewing port. When the adjusting screw 42 is rotated, the scale plate 43 moves up and down relative to the fixed scale needle 441. The scale value 431 indicated by the scale needle 441 in the scale viewing port 44 directly corresponds to the initial distance between the lower end face of the adjusting screw 42 and the upper touch button 351. This distance determines the maximum stroke of the piston rod 34 (and piston disc 36) in the measuring cylinder 3, thereby accurately setting the maximum amount of medicine that can be drawn in a single operation and ultimately discharged, achieving adjustable measurement. The lifting rod 45 is driven by the geared motor 41, and its lower end is rotatably connected to the side wall of the medicine tank 1 through the base block 46. The top of the base block 46 is equipped with a bottom touch button 461. When the lifting rod 45 drives the connecting block 35 and the piston rod 34 to move downward to the limit position and trigger the bottom touch button 461, a signal will also be sent to reset the lifting mechanism. The connecting block 35 and the lifting rod 45 are vertically rotatably connected, which ensures effective force transmission while allowing a certain degree of freedom of movement. The geared motor 41 drives the lifting rod 45 to move, which in turn drives the piston rod 34 and piston disc 36 to move downward through the connecting block 35, applying downward pressure to the metered liquid in the metering cylinder 3. At this time, the inlet solenoid valve 311 is closed and the outlet solenoid valve 322 is opened. The pressurized liquid flows to the spray gun through the outlet pipe 32, providing the pressure required for spraying, completely replacing the continuous pressure supply function of the traditional pump 5 (therefore, the pump 5 here is more accurately described as a pipeline connection point). In order to facilitate the operator to visually observe the liquid level in the metering cylinder 3 or the position of the piston disc 36 to confirm the metering status, a vertical viewing window 33 is specially provided on the outer wall of the metering cylinder 3.

[0021] The following points should be noted in this article: 1. The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment; other structures can refer to general designs.

[0022] 2. Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0023] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A garden pesticide sprayer with metering function, comprising: Medicine box (1); characterized in that a measuring cylinder (3) is vertically fixedly installed at the lower back of the medicine box (1), and the bottom two ends of the measuring cylinder (3) are respectively connected to the inlet pipe (31) and the outlet pipe (32). The other end of the inlet pipe (31) is connected to the inner cavity of the medicine box (1), and the other end of the outlet pipe (32) is connected to the medicine pump (5). The outlet pipe of the medicine pump (5) is connected to the spray gun. An inlet solenoid valve (311) and an outlet solenoid valve (322) are respectively installed on the inlet pipe (31) and the outlet pipe (32). A piston plate (36) is provided in the inner cavity of the measuring cylinder (3), and a piston rod (34) is vertically provided at the upper end of the piston plate (36). A lifting frame (4) is provided on the side wall of the medicine box (1) above the piston rod (34), and a lifting mechanism is provided on the lifting frame (4) to drive the piston rod (34) to move vertically.

2. A garden pesticide sprayer with metering function according to claim 1, characterized in that, The end of the outlet pipe (32) can be directly connected to the spray gun. The pressure of the spray gun comes from the downward thrust of the lifting mechanism on the piston rod (34) and piston disc (36). At this time, the inlet solenoid valve (311) is closed and the outlet solenoid valve (322) is opened.

3. A garden pesticide sprayer with metering function according to claim 1, characterized in that, The measuring cylinder (3) has a vertical viewing window (33) on its outer side wall.

4. A garden pesticide sprayer with metering function according to claim 1, characterized in that, The piston rod (34) is vertically fixed with a connecting block (35) at its upper end. The top plane of the connecting block (35) is provided with an upper touch button (351). After the upper touch button (351) is triggered, the lifting mechanism resets and rotates.

5. A garden pesticide sprayer with metering function according to claim 1, characterized in that, The lifting mechanism includes a geared motor (41), an adjusting screw (42), a scale plate (43), a scale (431), a scale viewing port (44), a scale needle (441), a lifting rod (45), a base block (46), and a bottom contact button (461). The upper end of the lifting frame (4) is provided with a geared motor (41), and the lifting frame (4) below the geared motor (41) is vertically provided with a lifting rod (45). The lower end of the lifting rod (45) is rotatably connected to the side wall of the medicine box (1) through the base block (46). The top of the base block (46) is provided with a bottom contact button (461). After the bottom contact button (461) is triggered, the lifting mechanism resets and rotates, and the connecting block (35) and the lifting rod (45) are perpendicular. The piston rod (34) is connected to the vertically rotating lifting frame (4) above the piston rod (34). The lower end of the adjusting screw (42) is vertically aligned with the upper touch button (351). The upper end of the adjusting screw (42) is rotatably fitted with an inverted "L"-shaped scale plate (43). The scale plate (43) has a scale (431) on its surface. The scale plate (43) slides vertically through the end of the lifting frame (4). The lifting frame (4) at the point where the scale plate (43) passes through is provided with a scale viewing port (44). The scale viewing port (44) is provided with a scale needle (441). The adjusting screw (42) is used to adjust the amount of medicine that can be drawn into the measuring cylinder (3).

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