CN219961764U - Fluid regulator for sprayer pesticide application valve main pipeline - Google Patents

Abstract

The invention discloses a fluid regulator for the main pipeline of a sprayer application valve. It is used to adjust the fluid flow velocity distribution in the pipeline section, and includes an adjustment blade, a pipe and a flange. The adjustment blade includes a shrink blade, an inner shrink tube, an outer shrink tube, and a shrink blade. Shrink tube, radial blade, inner radial tube, outer radial tube. The shrink blades, inner shrink tube and outer shrink tube are arranged at the front end of the pipeline to divide the space inside the pipeline into multiple front end fluid channels. The radial blades, inner radial tubes and outer radial tubes are arranged at the rear end of the pipeline, dividing the space inside the pipeline into a plurality of rear end fluid channels. The radial blades and contraction blades are arranged in a circular array along the axial direction of the pipeline. The back-end fluid channel is closely connected to the front-end fluid channel, and the inlet structural parameters of the back-end fluid channel are consistent with the outlet structural parameters of the front-end fluid channel. The fluid regulator provided by the present invention adopts a two-stage adjustment structure at the front and rear ends, which is beneficial to accelerating the stabilization of the irregular flow field.

Description

A fluid regulator for the main pipeline of the sprayer application valve

Technical field

The present invention relates to the field related to fluid rectification technology, and mainly relates to a fluid regulator for the main line of a sprayer's pesticide application valve.

Background technique

In order to achieve uniform pesticide application, variable application systems are increasingly used on sprayers. The current mainstream field variable pesticide application technology solution is that the processor adjusts the pesticide application amount based on the vehicle speed sensor, and the flow sensor performs feedback adjustment. The flow signal collected by the flow sensor is inaccurate, which will directly affect the accuracy of the pesticide application amount. The flow sensor commonly used in agriculture is the turbine flow sensor. The measurement accuracy and reliability of the turbine flow sensor are directly related to the flow state of the fluid in the pipeline. Due to the existence of flow spoilers such as elbows and branch pipes between pipelines, when the fluid reaches the turbine flow sensor, there will be large velocity distribution distortion, rotating flow and other uneven unsteady flow phenomena, which will affect the rotation of the turbine flow sensor rotor. Therefore, by installing a fluid regulator at the front end of the flow sensor, the accuracy of flow measurement is improved, which is conducive to precise adjustment of the pesticide application process.

At present, representative fluid regulators at home and abroad include vane type, orifice type and combined type. The representative one among the vane structures is the radial vane fluid regulator. The volume, weight, pressure loss, etc. of the regulator are reduced, but the blades in the tube wall area are sparse, which is not conducive to rectification. The representative structures of the orifice plate are the Laws structure and the Zanker structure. The regulator has a short length and a small volume, but has a small flow area and a large pressure loss. The combined structure refers to the combined structure of blade type and orifice plate type. The above fluid regulator cannot quickly rectify the complex flow field under multiple bends. In order to meet the measurement accuracy of the fluid in the main pipeline of the sprayer, a new technical solution is needed to solve the above problems.

Contents of the invention

In view of the above problems, in order to solve the rapid rectification of the flow field under complex conditions such as multiple bends and branch pipes, improve the rectification effect, and improve the measurement accuracy of the turbine flow sensor, the present invention designs a fluid regulator for the main line of the sprayer application valve . The technical solution of the present invention is: a fluid regulator for the main pipeline of a sprayer application valve, including a shrinking blade arranged at the front end of the pipe; a radial blade; an inner shrinking tube; an outer shrinking tube; and an inner radial tube. ;Outer radial pipe; pipe with inner diameter D; flange used to connect to the main pipeline of the pesticide application valve, which is characterized by:

The contraction blades are arranged in a circular array along the axis of the pipeline;

Further, the shrinking blades, inner shrinking tube and outer shrinking tube divide the space inside the pipeline into multiple front-end fluid channels. The shrinking angle θ of the shrinking blades is 1.3°, and the length L ₁ satisfies 2D ≤ L ₁ ≤ 2.5D;

Further, the shrinkage angle 2δ of the inner shrinkage tube and the outer shrinkage tube is 1.3°, and the length is the same as the length L ₁ of the shrinkage blade, the inner shrinkage tube and the outer shrinkage tube, satisfying 2D ≤ L ₁ ≤ 2.5D;

Further, the front-end fluid channel inlet flow area is larger than the front-end fluid channel outlet flow area;

Further, the radial blades are arranged at the rear end of the pipe;

Further, the radial blades are arranged in a circular array along the axial direction of the pipe;

Further, the radial blades, inner radial tubes and outer radial tubes divide the inner space of the pipeline into multiple back-end fluid channels, the lengths are the same and the length L ₂ satisfies 0.5D ≤ L ₂ ≤ D;

Further, the back-end fluid channel is closely connected to the front-end fluid channel, and the inlet size and structural parameters of the back-end fluid channel are consistent with the outlet size and structure parameters of the front-end fluid channel;

Further, the inlet flow area of the rear end fluid channel is equal to the outlet flow area of the rear end fluid channel;

Further, the flange can be connected to the main pipeline of the dispensing valve.

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

The present invention designs a two-stage structure of shrinking blades, inner shrinking tubes, outer shrinking tubes and radial blades, inner radial tubes and outer radial tubes based on the fully developed fluid cross-sectional velocity distribution law and the distribution state of the flow field under multi-bend tubes. The diameter of the main pipeline of the sprayer application valve is generally 32CM, which is a small-diameter pipeline. The fluid regulator is made of high-strength nylon using 3D printing technology. It is formed in one piece, with high structural strength and light weight.

Furthermore, according to the actual situation, the main pipeline of the sprayer application valve is located behind the flow regulating valve, return valve, etc. The rapid opening and closing of the flow regulating valve causes water hammer and cavitation phenomena, which in turn generates a large number of bubbles, affecting the measurement accuracy of the flow meter. Cavitation may even occur and damage the flow sensor rotor. The shrink blades, inner shrink tubes and outer shrink tubes designed by the present invention divide the space inside the pipeline into multiple front-end fluid channels. By reducing the tiny flow area, the negative impact caused by the cavities is minimized and at the same time maximized. Eliminate secondary flow vortices and large-scale eddies in fluids.

Furthermore, the radial blades are arranged parallel to the axis of the pipeline. The inner radial tube and the outer radial tube are combined to divide the pipeline space into multiple back-end fluid channels. The radial blade inlet receives the fluid from the shrinking blade outlet. The inner radial tube and the outer radial tube The tubes receive the fluid from the inner shrink tube and the outer shrink tube respectively, further eliminating the vortex in the fluid, greatly eliminating the flow field velocity distortion, and adjusting the blade outlet flow field to a uniform and center-symmetric flow field.

Furthermore, compared with ordinary blade-type fluid regulators, the number of blades is increased in the pipe wall area, which effectively enhances the rectification effect on the fluid near the pipe wall.

Description of drawings

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

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

Figure 3 is a schematic cross-sectional view along line A-A in Figure 2;

Figure 4 is a schematic cross-sectional view along B-B in Figure 2;

Figure 5 is a schematic diagram of the shrinking blades and radial blades at C in Figure 2;

Figure 6 is a schematic diagram of the inner shrink tube and the inner radial tube of Figure 2;

Figure 7 is a schematic structural diagram of the branch pipeline and main pipeline of the sprayer application valve;

Figure 8 is a velocity distribution cloud diagram of the pipeline at section 1 in Figure 7 without a fluid regulator installed;

Figure 9 is a cloud diagram of the pipeline velocity distribution at section 2 in Figure 7 after installing a fluid regulator whose adjustment blades are all radial blades;

Figure 10 is a cloud diagram of the velocity distribution of the pipeline at section 2 in Figure 7 after the present invention is installed;

In the figure, 101, adjusting blade; 102, flange; 103, pipe; 201, inner shrink tube; 202, outer shrink tube; 203, shrink blade; 204, radial blade; 205, outer radial tube; 401, inner diameter To the tube.

Detailed ways

In order to make the content of the present invention easier to understand clearly, the present invention will be described in further detail below based on specific embodiments and in conjunction with the accompanying drawings.

Please refer to Figure 1, a fluid regulator for the main pipeline of a sprayer application valve, which includes:

The adjusting blade 101, the pipe 103 and the flange 102 are made of high-strength nylon materials, made using 3D printing technology, and are integrally formed with high structural strength and light weight. The inner diameter of the pipeline 103 is D, which is the same as the inner diameter of the main pipeline of the corresponding sprayer application valve, and is connected to the main pipeline of the sprayer application valve through the flange 102.

Please refer to FIG. 2 . The adjusting blade 101 includes an inner shrink tube 201 , an outer shrink tube 202 , a shrink blade 203 , an inner radial tube 410 , an outer radial tube 205 , and a radial blade 204 . The inner shrink tube 201, the outer shrink tube 202 and the shrink blades 203 are arranged at the inner front end of the pipe 103, and the shrink blades 203 are arranged in a circumferential array along the axis of the pipe 103. The inner radial tube 410 , the outer radial tube 205 , and the radial blades 204 are arranged at the inner rear end of the pipe 103 , and the radial blades 204 are arranged in a circular array along the axial direction of the pipe 103 . Compared with ordinary blade-type fluid regulators, the number of blades in the pipe wall area of Pipe 103 is increased, which effectively enhances the rectification effect of the fluid near the pipe wall.

Please refer to Figures 3, 5 and 6. The inner shrinking tube 201, the outer shrinking tube 202 and the shrinking blades 203 divide the space inside the pipe 103 into multiple front-end fluid channels E. The shrinking angle θ of the shrinking blades 203 is 1.3°, the length L ₁ satisfies 2D ≤ L ₁ ≤ 2.5D, the shrinkage angle 2δ of the inner shrinkage tube 201 and the outer shrinkage tube 202 is 1.3°, and the length is the same as the length L ₁ of the shrinkage blade, the inner shrinkage tube and the outer shrinkage tube. , satisfying 2D≤L ₁ ≤2.5D. The inlet flow area of the front fluid channel E is larger than the outlet flow area of the front fluid channel E. The designed inner shrinking tube 201, outer shrinking tube 202, and shrinking blades 203 minimize the negative impact of cavities by reducing the tiny flow area, and at the same time greatly eliminate the secondary flow vortices and large-scale vortices in the fluid. vortex.

Referring to Figures 3 and 4, the inner radial tube 410, the outer radial tube 205, and the radial blades 204 divide the inner space of the pipe 103 into a plurality of rear-end fluid channels F. The radial blades (204), the inner radial blades (204), and the radial blades 204 The length of the tube (401) and the outer radial tube (205) are the same and the length L ₂ satisfies 0.5D ≤ L ₂ ≤ D. The rear fluid channel F is closely connected to the front fluid channel E. The inlet structural parameters of the back-end fluid channel F are consistent with the outlet structural parameters of the front-end fluid channel E, and the inlet flow area of the back-end fluid channel F is equal to the outlet flow area of the back-end fluid channel 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 shrink blade 201. The inner radial tube 401 and the outer radial tube 205 respectively receive the fluid of the inner shrink tube 201 and the outer shrink tube 202. The vortices in the flow field are further eliminated, the velocity distortion of the flow field is eliminated to a great extent, and the flow field at the outlet of blade 101 is adjusted to form a uniform and centrally symmetrical flow field, which can quickly rectify the complex flow field under multiple bends and improve the turbine flow rate. Sensor measurement accuracy.

Please refer to Figures 2 to 10. The shrinking angle of the shrinking blade (203), the inner shrinking tube (201) and the outer shrinking tube (202) is 1.3°, and the set length _L1 is 2D. The length L ₂ of the radial blade (204), inner radial tube (401) and outer radial tube (205) is set to 0.5D. After the present invention is installed in Section 1, it can be seen that the fluid velocity distribution after installing the present invention is closer to the fully developed cross-section velocity distribution. The unique structural design of the present invention makes the velocity distribution decrease in a stepwise manner from the center of the circular pipe to the surroundings, which is in line with the turbine Flow sensor requirements for fluid conditions.

Claims (2)

1. The fluid regulator for the main pipeline of the spraying machine pesticide application valve is characterized by comprising a regulating blade (101), a pipeline (103) and a flange (102), wherein the regulating blade (101) comprises a contraction blade (203), an inner contraction pipe (201), an outer contraction pipe (202), a radial blade (204), an inner radial pipe (401) and an outer radial pipe (205), the contraction blade (203), the inner contraction pipe (201) and the outer contraction pipe (202) are arranged at the inner front end of the pipeline (103) to divide the inner space of the pipeline (103) into a plurality of front end fluid channels E; the flow area of the inlet of the front-end fluid channel E is larger than that of the outlet of the front-end fluid channel E; the radial blades (204), the inner radial pipe (401) and the outer radial pipe (205) are arranged at the inner rear end of the pipeline (103) to divide the inner space of the pipeline (103) into a plurality of rear end fluid channels F; the rear end fluid channel F is tightly connected with the front end fluid channel E, the inlet structural parameter of the rear end fluid channel F is consistent with the outlet structural parameter of the front end fluid channel E, the inlet flow area of the rear end fluid channel F is equal to the outlet flow area of the rear end fluid channel F, and the flanges (102) are arranged at two ends of the pipeline (103) and are used for being connected with a main pipeline of the sprayer pesticide application valve.

2. A fluid regulator for a main line of a sprayer dosing valve according to claim 1, characterized in that said conduit (103) has an internal diameter D; the contraction angle of the contraction blade (203), the inner contraction tube (201) and the outer contraction tube (202) is 1.3Degree, the same length and length L ₁ Satisfies 2D is less than or equal to L ₁ Less than or equal to 2.5D; the radial blades (204), the inner radial tube (401) and the outer radial tube (205) have the same length and the length L ₂ Satisfies 0.5D is less than or equal to L ₂ ≤D。