Double ellipse streamline rotary emitter plug and its installation method

A technology of emitter and rotary body, which is applied in the field of double ellipse streamline rotary emitter plug, which can solve the problems of large water head loss, etc., and achieve the effect of increasing the laying length, increasing the conveying distance, and reducing the local water head loss

Active Publication Date: 2022-03-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a double ellipse streamline rotary emitter plug and its installation method, which can solve the problem of large local water head loss and reduce the shape resistance of the emitter plug part to the greatest extent

Method used

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  • Double ellipse streamline rotary emitter plug and its installation method
  • Double ellipse streamline rotary emitter plug and its installation method
  • Double ellipse streamline rotary emitter plug and its installation method

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Such as image 3 As shown, a double ellipse streamline rotary emitter plug includes a plug inverted cone 6, the upper end of the plug inverted cone 6 is provided with a plug water inlet 5, and the lower surface of the plug inverted cone 6 is sequentially aligned with the plug cone neck 7 from top to bottom. , the dripper cavity 8 and the dripper outlet pipe 9 are connected, the cross-sectional contour line of the plug inverted cone 6 is a double ellipse streamlined curve; the cross-sectional contour line of the plug cone neck 7 is a plug cone neck double ellipse streamlined curve, and its upper The area of ​​the plane space enclosed by the double elliptical streamlined curve of the taper neck of the plug on the lower end face is the same.

[0065] Such as figure 1 and figure 2 As shown, the plug inverted cone 6 is obtained by the following method:

[0066] Step 1: Obtain a double ellipse streamlined curve 10 according to the combination of mathematical expressions, ...

Embodiment 2

[0080] An installation method for the above-mentioned double ellipse streamline rotary emitter plug, the double ellipse streamline curve 10 of the plug inverted cone 6 of the emitter plug is placed in front along the curve 1-2-3 of the upstream section, and the curve 1-2-3 of the outflow section 4-3 Insert the capillary into the punched hole in the rear direction, and then pull the inserted emitter plug back to the position where the lower end of the plug's inverted cone 6 is close to the inner wall of the capillary to ensure that the plug and the capillary are tightly fitted to prevent watering. water leakage.

Embodiment 3

[0082] The drip irrigation pipe composed of two types of emitters, the conical emitter plug and the double ellipse streamline rotary emitter plug, was simulated to observe the resistance of the two emitter plugs. Set a 1m-long capillary, and insert three double-elliptical streamline rotary emitters into the capillary with a distance of 0.2m. As a control, a 1m long capillary was also taken, and three conical emitters were inserted into it to simulate the total head loss of the capillary. The head loss along the capillary is calculated by Darcy's formula, and the local head loss is obtained by subtracting the head loss along the capillary from the total head. According to the simulation results, the double ellipse streamline rotary emitter can effectively reduce the local resistance of the emitter, and the drag reduction ratio is 17.1%-34.6% (this ratio shows that the double ellipse streamline rotary dripper can effectively reduce the local water head loss of the dripper compar...

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PUM

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Abstract

A double ellipse streamline rotary sprinkler plug, including a plug inverted cone, the upper end of the plug inverted cone is provided with a plug water inlet, and the lower surface of the plug inverted cone is sequentially connected with the plug cone neck, the dripper cavity and the dripper from top to bottom. The outlet pipe is connected, and the cross-sectional contour line of the inverted cone of the plug is a double ellipse streamlined curve; the cross-sectional contour line of the taper neck of the plug is a double ellipse streamlined curve, and the areas of the double ellipse streamlined curves on the upper end surface and the lower end surface are the same. The double ellipse streamline rotary emitter plug provided by the present invention and its installation method can solve the problem of large local water head loss and reduce the shape resistance of the emitter plug part to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of micro-irrigation emitters, in particular to a double ellipse streamline rotary emitter plug and an installation method thereof. Background technique [0002] Drip irrigation is widely used as an efficient water-saving irrigation technology, and the plug-in emitter is widely used because of its simple installation, convenient maintenance and strong adaptability. However, the plug part of the plug-in emitter must be inserted into the capillary to form a protrusion in the pipe, and the plug protrusion will cause a sudden change in the cross-sectional shape of the capillary, resulting in local head loss. When the diameter of the drip irrigation pipe is small or the distance between the emitters is small, the plug part of the emitter will cause a large local head loss, which will significantly reduce the water flow pressure along the direction of the capillary, thereby reducing the flow of the emitter and redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G25/02
CPCA01G25/023A01G25/026
Inventor 王亚林陈里朱士江张涛杨忠勇
Owner CHINA THREE GORGES UNIV
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