Single-ellipsoidal double-parabola streamlined irrigation emitter plug and mounting method thereof

Abstract

A single-ellipsoidal double-parabola streamlined irrigation emitter plug a plug back taper. A plug water inlet is formed in the upper end face of the plug back taper, the lower surface of the plug back taper is sequentially communicated with a plug taper neck, a dropper cavity and a dropper water outlet pipe from top to bottom, the contour line of the cross section of the plug back taper is a single-ellipsoidal double-parabola streamlined curve, the area of a second single-ellipsoidal double-parabola streamlined curve on the upper end face is minimum, the area of a first single-ellipsoidal double-parabola streamlined curve on the lower end face is maximum, the contour line of the cross section of the plug taper neck is a single-ellipsoidal double-parabola streamlined curve, and the area ofthe single-ellipsoidal double-parabola streamlined curve of the upper end face is as same as that of the single-ellipsoidal double-parabola streamlined curve of the lower end face of the plug taper neck. According to the single-ellipsoidal double-parabola streamlined irrigation emitter plug, the problem of great local head loss can be solved, and the plug form resistance of an irrigation emitteris maximally reduced.

Description

technical field

[0001] The invention relates to the technical field of micro-irrigation emitters, in particular to a single-ellipse double-throw streamlined emitter plug. 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, and a protrusion will be formed in the pipe. The protrusion of the plug 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 can cause a large local head loss, which will significantly reduce the water flow pressure along the direction of the capillary, thereby affecting the flow of the emitter and reducing the layi...

Examples

Embodiment 1

[0076] like image 3 As shown, a single ellipse double-throwing streamline 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 connected 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 single ellipse double-throw streamlined curve, and the second single-ellipse double-throw streamlined curve 10 on the upper end surface encloses the smallest plane space area , the plane space area surrounded by the first single ellipse double throw streamlined curve 11 on its lower end face is the largest; The area of ​​the plane space enclosed by the elliptic double parabolic streamlined curves is the same.

[0077] like figure 2 Shown:

[0078] Plug inverted cone 6 is obtained through the following steps:

[0079] Step 1...

Embodiment 2

[0100] A method for installing the above-mentioned single-ellipse double-throw streamlined emitter plug, the first single-ellipse double-throw streamlined curve 11 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 outflow section The curve 1-4-3 is aligned with the punched hole and inserted into the capillary in the rear direction, and then the inserted emitter plug is pulled back until the lower end surface of the plug inverted cone 6 is close to the inner wall of the capillary to ensure that the plug and the capillary fit tightly , to prevent water leakage during irrigation.

Embodiment 3

[0102] The drip irrigation pipe composed of the conical emitter emitter plug and the single ellipse double throw streamlined emitter plug is simulated to observe the resistance of the two emitter plugs:

[0103] Set a 1m-long capillary, and insert three single-ellipse, double-throw streamlined emitter plugs into the capillary with a distance of 0.2m. As a control, a 1m long capillary was also taken, and three conical emitter plugs 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 single-ellipse double-throwing streamlined emitter plug can effectively reduce the local resistance of the emitter, and the drag reduction ratio is 15.1%-27.5%. (This ratio shows that the single-ellipse double-throw streamlined dripper can effectively reduce the local...

technical field

[0001] The invention relates to the technical field of micro-irrigation emitters, in particular to a single-ellipse double-throw streamlined emitter plug. 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, and a protrusion will be formed in the pipe. The protrusion of the plug 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 can cause a large local head loss, which will significantly reduce the water flow pressure along the direction of the capillary, thereby affecting the flow of the emitter and reducing the layi...

Examples

Embodiment 1

[0076] like image 3 As shown, a single ellipse double-throwing streamline 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 connected 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 single ellipse double-throw streamlined curve, and the second single-ellipse double-throw streamlined curve 10 on the upper end surface encloses the smallest plane space area , the plane space area surrounded by the first single ellipse double throw streamlined curve 11 on its lower end face is the largest; The area of ​​the plane space enclosed by the elliptic double parabolic streamlined curves is the same.

[0077] like figure 2 Shown:

[0078] Plug inverted cone 6 is obtained through the following steps:

[0079] Step 1...

Embodiment 2

[0100] A method for installing the above-mentioned single-ellipse double-throw streamlined emitter plug, the first single-ellipse double-throw streamlined curve 11 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 outflow section The curve 1-4-3 is aligned with the punched hole and inserted into the capillary in the rear direction, and then the inserted emitter plug is pulled back until the lower end surface of the plug inverted cone 6 is close to the inner wall of the capillary to ensure that the plug and the capillary fit tightly , to prevent water leakage during irrigation.

Embodiment 3

[0102] The drip irrigation pipe composed of the conical emitter emitter plug and the single ellipse double throw streamlined emitter plug is simulated to observe the resistance of the two emitter plugs:

[0103] Set a 1m-long capillary, and insert three single-ellipse, double-throw streamlined emitter plugs into the capillary with a distance of 0.2m. As a control, a 1m long capillary was also taken, and three conical emitter plugs 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 single-ellipse double-throwing streamlined emitter plug can effectively reduce the local resistance of the emitter, and the drag reduction ratio is 15.1%-27.5%. (This ratio shows that the single-ellipse double-throw streamlined dripper can effectively reduce the local...

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