A fluid regulator for a spray machine application valve main

Abstract

The application discloses a fluid regulator for a spraying machine medicine valve main pipeline, which is used for adjusting the fluid flow velocity distribution of the pipeline cross section and comprises an adjusting blade, a pipeline and a flange, wherein the adjusting blade comprises a contraction blade, an inner contraction pipe, an outer contraction pipe, a radial blade, an inner radial pipe and an outer radial pipe. The contraction blade, the inner contraction pipe and the outer contraction pipe are arranged at the front end of the pipeline, and divide the space in the pipeline into a plurality of front-end fluid channels. The radial blade, the inner radial pipe and the outer radial pipe are arranged at the rear end of the pipeline, and divide the space in the pipeline into a plurality of rear-end fluid channels. The radial blade and the contraction blade are arranged in a circumferential array along the axial direction of the pipeline. The rear-end fluid channels are tightly connected with the front-end fluid channels, and the inlet structural parameters of the rear-end fluid channels are consistent with the outlet structural parameters of the front-end fluid channels. The fluid regulator provided by the application adopts a two-stage adjusting structure of front and rear ends, and is favorable for accelerating the irregular flow field to be stable.

Description

Technical Field

[0001] This invention relates to the field of fluid rectification technology, and mainly to a fluid regulator for the main pipeline of a sprayer application valve. Background Technology

[0002] To achieve uniform pesticide application, variable displacement spraying systems are increasingly used in sprayers. Currently, the mainstream field variable displacement spraying technology involves a processor adjusting the spray dosage based on a vehicle speed sensor, with a flow sensor providing feedback adjustment. Inaccurate flow signals from the flow sensor directly affect the precision of the spray dosage. The most commonly used flow sensor in agriculture is the turbine flow sensor. The accuracy and reliability of turbine flow sensors are directly related to the flow state of the fluid within the pipeline. Due to flow disturbances such as bends and branches in the pipeline, the fluid reaching the turbine flow sensor experiences significant velocity distribution distortion and swirling flow, resulting in uneven and unsteady flow phenomena that affect the rotation of the turbine flow sensor rotor. Therefore, installing a fluid regulator upstream of the flow sensor improves the accuracy of flow measurement and facilitates precise pesticide application.

[0003] Currently, representative fluid conditioners both domestically and internationally include blade-type, orifice plate-type, and combined types. Among blade-type structures, the radial blade fluid conditioner is representative, reducing the conditioner's volume, weight, and pressure loss; however, the blades are sparse in the pipe wall area, which is detrimental to flow rectification. Among orifice plate-type structures, the Laws and Zanker structures are representative, resulting in short lengths and small volumes, but small flow areas and high pressure losses. Combined structures refer to a combination of blade-type and orifice plate-type structures. These fluid conditioners cannot quickly rectify complex flow fields under multiple bends in the pipe. To ensure the accuracy of fluid measurement in the main pipeline of the sprayer, a new technical solution is needed to address these problems. Summary of the Invention

[0004] To address the aforementioned problems and improve the flow field rectification under complex conditions such as multiple bends and branch pipes, thereby enhancing the rectification effect and increasing the measurement accuracy of the turbine flow sensor, this invention designs a fluid adjuster for the main pipeline of a sprayer's application valve. The technical solution of this invention is: a fluid adjuster for the main pipeline of a sprayer's application valve, comprising: a contraction blade disposed at the front end of the pipeline; radial blades; an inner contraction pipe; an outer contraction pipe; an inner radial pipe; an outer radial pipe; a pipeline with an inner diameter of D; and a flange for connecting to the main pipeline of the application valve. Its characteristic is:

[0005] The contraction blades are arranged in a circular array along the pipe axis;

[0006] Furthermore, the contraction blade, inner contraction tube, and outer contraction tube divide the internal space of the pipe into multiple front-end fluid channels. The contraction angle θ of the contraction blade is 1.3°, and the length L1 satisfies 2D≤L1≤2.5D.

[0007] Furthermore, the contraction angle 2δ of the inner and outer contraction tubes is 1.3°, and their lengths are the same as the lengths L1 of the contraction blades, inner and outer contraction tubes, satisfying 2D≤L1≤2.5D;

[0008] Furthermore, the inlet flow area of ​​the front-end fluid channel is larger than the outlet flow area of ​​the front-end fluid channel;

[0009] Furthermore, the radial blades are disposed at the rear end of the pipe;

[0010] Furthermore, the radial blades are arranged in a circumferential array along the pipe axis;

[0011] Furthermore, the radial blades, inner radial tube, and outer radial tube divide the internal space of the pipe into multiple rear fluid channels with the same length and the length L2 satisfies 0.5D≤L2≤D;

[0012] Furthermore, the rear fluid channel is closely connected to the front fluid channel, and the inlet size and structural parameters of the rear fluid channel are consistent with the outlet size and structural parameters of the front fluid channel.

[0013] Furthermore, the inlet flow area of ​​the rear fluid channel is equal to the outlet flow area of ​​the rear fluid channel;

[0014] Furthermore, the flange can be connected to the main pipeline of the drug delivery valve.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention, based on a thorough understanding of the fluid cross-sectional velocity distribution and the flow field distribution under multiple bends, designs a two-stage structure consisting of contracting blades, an inner contracting tube, and an outer contracting tube, as well as radial blades, an inner radial tube, and an outer radial tube. The main pipeline diameter of the sprayer's application valve is typically 32 cm, classifying it as a small-diameter pipe. The fluid regulator is made of high-strength nylon using 3D printing technology, resulting in a one-piece molding process with high structural strength and light weight.

[0017] Furthermore, based on actual conditions, the main pipeline of the sprayer's application valve is located downstream of the flow regulating valve and return valve. The rapid opening and closing of the flow regulating valve generates water hammer and cavitation, which in turn produces a large number of bubbles, affecting the accuracy of the flow meter measurement and even causing cavitation that damages the flow sensor rotor. The shrinking blades, inner shrinking tube, and outer shrinking tube designed in this invention divide the pipeline space into multiple front-end fluid channels. By reducing the flow area by a small amount, the negative impact of cavitation is minimized, while simultaneously greatly eliminating secondary flow vortices and large-scale eddies in the fluid.

[0018] Furthermore, the radial blades are set parallel to the pipe axis, and the pipe space is divided into multiple rear fluid channels by the inner and outer radial pipes. The radial blade inlet receives the fluid from the converging blade outlet, and the inner and outer radial pipes receive the fluid from the inner and outer converging pipes, respectively. This further eliminates vortices in the fluid, greatly reduces flow field velocity distortion, and adjusts the flow field at the blade outlet to be a uniform and centrally symmetrical flow field.

[0019] Furthermore, compared to ordinary blade-type fluid regulators, the number of blades in the pipe wall area is increased, effectively enhancing the rectification effect on the fluid near the pipe wall. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a fluid regulator for the main pipeline of a sprayer application valve according to the present invention;

[0021] Figure 2 This is a schematic diagram of the internal blades of a fluid regulator for the main pipeline of a sprayer application valve according to the present invention;

[0022] Figure 3 yes Figure 2 Schematic diagram of the AA-direction section;

[0023] Figure 4 yes Figure 2 Schematic diagram of the BB-direction section;

[0024] Figure 5 yes Figure 2 A schematic diagram of the contraction blade and radial blade at point C;

[0025] Figure 6 yes Figure 2 A schematic diagram of the inner contraction tube and the inner radial tube;

[0026] Figure 7 This is a schematic diagram of the branch pipeline and main pipeline of the sprayer's application valve;

[0027] Figure 8 The fluid regulator is not installed. Figure 7 Velocity distribution contour map of the pipe at mid-section 1;

[0028] Figure 9 After installing a fluid regulator with radial blades as the adjusting blades Figure 7 Velocity distribution contour map of the pipe at section 2;

[0029] Figure 10 After installing this invention Figure 7 Velocity distribution contour map of the pipe at section 2;

[0030] In the diagram, 101 is the adjusting blade; 102 is the flange; 103 is the pipe; 201 is the inner contraction pipe; 202 is the outer contraction pipe; 203 is the contraction blade; 204 is the radial blade; 205 is the outer radial pipe; and 401 is the inner radial pipe. Detailed Implementation

[0031] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0032] Please see Figure 1 A fluid regulator for the main pipeline of a sprayer application valve, comprising:

[0033] The adjusting blade 101, pipe 103, and flange 102 are made of high-strength nylon material and manufactured using 3D printing technology in a single piece, resulting in high structural strength and light weight. The inner diameter of the pipe 103 is D, which is the same as the inner diameter of the main pipeline of the corresponding sprayer's application valve, and it is connected to the main pipeline of the sprayer's application valve via the flange 102.

[0034] Please see Figure 2 The adjusting blade 101 includes an inner contraction tube 201, an outer contraction tube 202, contraction blades 203, an inner radial tube 410, an outer radial tube 205, and radial blades 204. The inner contraction tube 201, outer contraction tube 202, and contraction blades 203 are located at the front end of the pipe 103, with the contraction blades 203 arranged in a circular array along the axis of the pipe 103. The inner radial tube 410, outer radial tube 205, and radial blades 204 are located at the rear end of the pipe 103, with the radial blades 204 arranged in a circular array along the axial direction of the pipe 103. Compared to ordinary blade-type fluid regulators, the increased number of blades in the pipe wall region of the pipe 103 effectively enhances the rectification effect on the fluid near the pipe wall.

[0035] Please see Figure 3 , Figure 5 and Figure 6 The inner contraction tube 201, outer contraction tube 202, and contraction blade 203 divide the internal space of the pipe 103 into multiple front-end fluid channels E. The contraction angle θ of the contraction blade 203 is 1.3°, and its length L1 satisfies 2D≤L1≤2.5D. The contraction angle 2δ of the inner contraction tube 201 and outer contraction tube 202 is 1.3°, and their lengths are the same as the length L1 of the contraction blade, inner contraction tube, and outer contraction tube, satisfying 2D≤L1≤2.5D. The inlet flow area of ​​the front-end fluid channel E is larger than the outlet flow area of ​​the front-end fluid channel E. The designed inner contraction tube 201, outer contraction tube 202, and contraction blade 203 minimize the negative impact of cavitation by reducing the flow area slightly, while greatly eliminating secondary flow vortices and large-scale eddies in the fluid.

[0036] Please see Figure 3 and Figure 4 The inner radial pipe 410, outer radial pipe 205, and radial blade 204 divide the internal space of pipe 103 into multiple rear fluid channels F. The radial blade (204), inner radial pipe (401), and outer radial pipe (205) have the same length, and their lengths L2 satisfy 0.5D≤L2≤D. The rear fluid channels F are tightly connected to the front fluid channels E. The inlet structural parameters of the rear fluid channels F are consistent with the outlet structural parameters of the front fluid channels E, and the inlet flow area of ​​the rear fluid channels F is equal to the outlet flow area of ​​the rear fluid channels F. The radial blade 204 is arranged parallel to the axis of the pipe 103. The inlet of the radial blade 204 receives the fluid from the outlet of the converging blade 201. The inner radial pipe 401 and the outer radial pipe 205 receive the fluid from the inner converging pipe 201 and the outer converging pipe 202, respectively. This further eliminates vortices in the flow field, greatly reduces flow field velocity distortion, and adjusts the flow field at the outlet of the blade 101 to be a uniform and centrally symmetrical flow field. This allows for rapid rectification of complex flow fields under multiple bends, improving the measurement accuracy of the turbine flow sensor.

[0037] Please see Figures 2 to 10 The contraction angle of the contraction blade (203), inner contraction tube (201), and outer contraction tube (202) is 1.3°, and the length L1 is set to 2D. The length L2 of the radial blade (204), inner radial tube (401), and outer radial tube (205) is set to 0.5D. After the invention is installed at section 1, it can be seen that the fluid velocity distribution after the invention is installed is closer to the velocity distribution of a fully developed section. The unique structural design of the invention makes the velocity distribution decrease in a stepwise manner from the center of the circular pipe to the periphery, which meets the requirements of the turbine flow sensor for the fluid state.

Claims

1. A fluid regulator for the main pipeline of a sprayer's application valve, characterized in that... The system includes adjusting blades (101), a pipe (103), and a flange (102). The adjusting blades (101) include a contraction blade (203), an inner contraction tube (201), an outer contraction tube (202), a radial blade (204), an inner radial tube (401), and an outer radial tube (205). The contraction blades (203), the inner contraction tube (201), and the outer contraction tube (202) are located at the front end of the pipe (103). The contraction blades (203) are arranged in a circular array along the axis of the pipe (103), dividing the space inside the pipe (103) into multiple front-end fluid channels E. The inlet flow area of ​​the front-end fluid channel E is larger than the outlet flow area of ​​the front-end fluid channel E. The radial blades (204), the inner radial tube (401), and the outer radial tube (205) are located at the rear end of the pipe (103), dividing the space inside the pipe (103) into multiple rear-end flow channels. The fluid channel F is connected to the front fluid channel E. The inlet structural parameters of the rear fluid channel F are the same as the outlet structural parameters of the front fluid channel E. The inlet flow area of ​​the rear fluid channel F is equal to the outlet flow area of ​​the rear fluid channel F. The flange (102) is set at both ends of the pipe (103) for connection with the main pipeline of the sprayer's application valve. The radial blade (204) is set parallel to the axis of the pipe (103). The inlet of the radial blade (204) receives the fluid from the outlet of the contraction blade (203). The inner radial pipe (401) and the outer radial pipe (205) respectively receive the fluid from the inner contraction pipe (201) and the outer contraction pipe (202), further eliminating vortices in the flow field. The outlet flow field of the adjusting blade (101) is uniform and centrally symmetrical, which quickly rectifyes the complex flow field under multiple bends. The inner diameter of the pipe (103) is D; the contraction angle of the contraction blade (203), the inner contraction tube (201) and the outer contraction tube (202) is 1.3°, and the lengths are the same and the length L1 satisfies 2D≤L1≤2.5D; the lengths of the radial blade (204), the inner radial tube (401) and the outer radial tube (205) are the same and the length L2 satisfies 0.5D≤L2≤D. The fluid regulator for the main pipeline of the sprayer's application valve is installed after the cross-section, and the velocity distribution decreases in a stepwise manner from the center of the circular pipe to the surrounding area, which meets the requirements of the turbine flow sensor for the fluid state.

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