Helicopter agriculture and forestry spraying device with flow adjusting function

Abstract

The utility model provides a helicopter agriculture and forestry spraying device with a flow adjusting function, and the device comprises a pesticide box which is installed at a first preset position of the abdomen of a helicopter through a connector; the spraying pump is connected with the pesticide box, and the spraying pump is arranged on an undercarriage of the helicopter; the electromagnetic valve is connected with the spraying pump, and the electromagnetic valve is arranged on the pesticide box; one end of the stirring pipeline is connected with the electromagnetic valve, and the other end of the stirring pipeline is connected with the pesticide box; one end of the spraying pipeline is connected with the electromagnetic valve; the spraying rod is connected with the other end of the spraying pipeline, and the spraying rod is installed at a second preset position of the abdomen of the helicopter; and the throttling valve is arranged on the spraying pipeline, and the throttling valve is used for changing the flow resistance on the spraying pipeline to realize flow control.

Description

Technical Field

[0001] This application belongs to the field of helicopter agricultural and forestry spraying technology, and in particular relates to a helicopter agricultural and forestry spraying device with flow rate adjustment function. Background Technology

[0002] Helicopters, with their superior low-altitude, low-speed performance and flexible takeoff and landing capabilities, are widely used for agricultural and forestry spraying operations. To meet the needs of different spraying capacity scenarios, the spraying equipment must be efficient, lightweight, and easy to operate with a flow rate adjustment mechanism. Utility Model Content

[0003] The purpose of this application is to meet different spraying flow requirements by combining outlet throttling and load regulation. This application features a wide flow regulation range and simple operation and maintenance, and can meet the requirements of constant and low-volume spraying operations.

[0004] This application provides a helicopter agricultural and forestry spraying device with flow regulation function, the device comprising:

[0005] The medicine box is installed at a first predetermined position on the belly of the helicopter via a connector;

[0006] A spray pump is connected to the medicine tank, wherein the spray pump is mounted on the helicopter landing gear;

[0007] A solenoid valve is connected to the spray pump, and the solenoid valve is mounted on the medicine tank.

[0008] A stirring pipeline, one end of which is connected to the solenoid valve, and the other end of which is connected to the medicine tank;

[0009] A spraying pipeline, one end of which is connected to the solenoid valve;

[0010] A spray boom is connected to the other end of the spray pipe, and the spray boom is installed at a second preset position on the belly of the helicopter.

[0011] A throttle valve is installed in the spraying pipeline. The throttle valve is used to change the flow resistance in the spraying pipeline to achieve flow control.

[0012] Preferably, the solenoid valve is a two-position three-way solenoid valve.

[0013] Preferably, during stirring, the spray pump draws the liquid medicine back to the medicine tank directly through the two-position three-way solenoid valve and the stirring pipeline.

[0014] Preferably, the device further includes:

[0015] Multiple nozzles are evenly arranged on the spray bar.

[0016] Preferably, the device further includes:

[0017] A bypass return pipeline is installed between the mixing pipeline and the spraying pipeline.

[0018] Preferably, the bypass return line is in the form of a flexible hose, which returns a portion of the flow output from the spray pump back to the medicine tank.

[0019] Preferably, the stirring pipeline, the spraying pipeline, and the bypass return pipeline are all installed on the medicine tank by clamps.

[0020] Preferably, the first preset position is located within the center of gravity envelope of the helicopter, and the second preset position is close to the nose of the helicopter; the first preset position and the second preset position are different.

[0021] The beneficial technical effects of this application are as follows:

[0022] This application provides a helicopter agricultural and forestry spraying device with flow regulation function, which mainly consists of a bypass return pipeline, a throttle valve, and a multi-position nozzle. It adopts two methods, outlet throttling regulation and load regulation, to achieve wide-range flow regulation. Attached Figure Description

[0023] Figure 1 Schematic diagram of the flow regulation device for the spraying system;

[0024] Figure 2 Diagram illustrating the principle of spray flow rate adjustment;

[0025] Figure 3 Design analysis diagram for bypass return pipeline diameter;

[0026] Figure 4 This is a schematic diagram showing the nozzle mounted on the spray bar.

[0027] Figure 5 This is a schematic diagram of the nozzle structure;

[0028] Figure 6 This is a schematic diagram of a rotating nozzle;

[0029] The components are: 1-Medicine tank, 2-Spray pump, 3-Two-position three-way solenoid valve, 4-Bypass return pipeline, 5-Throttle valve, 6-Spray head, 7-Agitator pipeline, 8-Spraying pipeline, 9-Spray bar. Detailed Implementation

[0030] Please see Figure 1The agricultural and forestry spraying flow regulating device provided in this application includes a pesticide tank, a spray pump, a two-position three-way solenoid valve, a bypass return pipeline, a throttle valve, and a nozzle. The pesticide tank can hold spraying liquid, and the spray pump is installed on the left side of the pesticide tank's heading. The spray pump is driven by a gasoline engine and draws liquid from the bottom of the pesticide tank.

[0031] The spray pump outlet is equipped with a two-position three-way solenoid valve, which switches between spraying and stirring functions. During stirring, the spray pump draws the pesticide solution back to the pesticide tank via the solenoid valve and stirring pipeline. A throttle valve is installed on the spray pipeline; adjusting the valve opening changes the flow resistance in the spray pipeline, thus controlling the flow rate.

[0032] The spraying pipeline and the mixing pipeline are connected by a bypass return pipeline. When the throttle valve is closed and spraying stops or the spraying flow rate is low, the liquid can return to the tank through the bypass return pipeline to prevent the pipeline pressure from being too high or backflow.

[0033] The nozzles are evenly distributed on the spray bar. Each nozzle can be manually rotated and adjusted before spraying. By adjusting the nozzle's cross-sectional area, the spray flow rate can be adjusted by changing the load characteristics, thus further expanding the flow rate adjustment range and meeting the needs of spraying operations.

[0034] The flow regulating device provided in this application mainly consists of a bypass return pipeline 4, a throttle valve 5, and a multi-position nozzle 6. It adopts two methods, outlet throttling regulation and load regulation, to achieve wide-range flow regulation.

[0035] The bypass return line 4 is installed between the mixing line 7 and the spraying line 8, using a flexible hose to return a portion of the flow output from the spraying pump 2 back to the chemical tank 1. This serves two purposes: firstly, when the throttle valve 5 is closed and spraying stops, or when the spraying flow rate is low, the pesticide solution can return to the chemical tank 1 through the bypass return line 4, preventing excessive pressure or backflow in the pipeline; secondly, a properly designed diameter for the bypass return line 4 allows for optimal spraying system efficiency. This is achieved through calculations (such as...). Figure 3 As shown in the figure, the spray flow rate should be as large as possible, the spray flow rate ratio should be as high as possible, the actual pump head should be as large as possible, and the efficiency should be as high as possible. Comprehensive research shows that for a spray pipeline with an inner diameter of 50mm, the bypass pipeline with an inner diameter of 8mm is optimal.

[0036] The throttle valve 5 is installed on the spraying pipeline. Adjusting the opening of the throttle valve changes the resistance loss of the spraying pipeline. When it is necessary to increase the spraying flow rate, the opening of the throttle valve is increased (flow regulation principle is as follows). Figure 2 (Illustration of adjusting the operating point from A to B); When it is necessary to reduce the spray flow rate, the throttle valve opening is reduced, increasing the flow resistance of the entire spray pipeline (flow regulation principle is as follows). Figure 2 (The intermediate operating point is adjusted from B to A, as shown in the diagram), thereby achieving flow regulation.

[0037] Please see Figure 4 The nozzles 6 are evenly mounted on the spray bar 9 via their own threaded connectors 6.4, such as... Figure 5 As shown, the spray head is equipped with three nozzles of different diameters (6.1, 6.2, and 6.3); as Figure 6 As shown, the appropriate nozzle can be manually rotated to select the desired size. Different nozzle diameters correspond to different loads. Adjusting the load characteristics changes the resistance loss of the entire spray pipeline, thus altering the pipeline system's characteristic curve. When increasing the spray flow rate, reduce the working load and select a nozzle with a larger flow cross-sectional area (flow regulation principle is as follows). Figure 2 (Diagram showing adjustment from A to B for the intermediate operating point); When it is necessary to reduce the system flow rate, increase the workload and select a nozzle with a small flow cross-sectional area (flow regulation principle is as follows). Figure 2 (The intermediate operating point is adjusted from B to A, as shown in the diagram), thereby achieving flow regulation.

Claims

1. A helicopter agricultural and forestry spraying device with flow rate adjustment function, characterized in that, The device includes: The medicine box is installed at a first predetermined position on the belly of the helicopter via a connector; A spray pump is connected to the medicine tank, wherein the spray pump is mounted on the helicopter landing gear; A solenoid valve is connected to the spray pump, and the solenoid valve is mounted on the medicine tank. A stirring pipeline, one end of which is connected to the solenoid valve, and the other end of which is connected to the medicine tank; A spraying pipeline, one end of which is connected to the solenoid valve; A spray boom is connected to the other end of the spray pipe, and the spray boom is installed at a second preset position on the belly of the helicopter. A throttle valve is installed in the spraying pipeline. The throttle valve is used to change the flow resistance in the spraying pipeline to achieve flow control.

2. The apparatus according to claim 1, characterized in that, The solenoid valve is a two-position three-way solenoid valve.

3. The apparatus according to claim 2, characterized in that, During stirring, the spray pump draws the liquid medicine back to the medicine tank directly through the two-position three-way solenoid valve and the stirring pipeline.

4. The apparatus according to claim 3, characterized in that, The device further includes: Multiple nozzles are evenly arranged on the spray bar.

5. The apparatus according to claim 4, characterized in that, The device further includes: A bypass return pipeline is installed between the mixing pipeline and the spraying pipeline.

6. The apparatus according to claim 5, characterized in that, The bypass return pipeline is in the form of a flexible hose, which returns a portion of the flow output from the spray pump back to the medicine tank.

7. The apparatus according to claim 6, characterized in that, The stirring pipeline, the spraying pipeline, and the bypass return pipeline are all installed on the medicine tank by clamps.

8. The apparatus according to claim 1, characterized in that, The first preset position is located within the center of gravity envelope of the helicopter, and the second preset position is close to the nose of the helicopter; the first preset position and the second preset position are different.

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