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Whole aeration cyclone vertical shaft

A shaft, the whole process technology, applied in the field of aeration and corrosion reduction, to achieve the effect of high operation safety, ingenious conception and easy construction

Inactive Publication Date: 2013-10-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of cavitation and cavitation when the swirl shaft is used in high water head and large flow to solve the problem of cavitation and cavitation, and to improve the efficiency of the swirl shaft. security of operation

Method used

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  • Whole aeration cyclone vertical shaft
  • Whole aeration cyclone vertical shaft
  • Whole aeration cyclone vertical shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The swirl shaft of the whole process aeration provided in this embodiment is as follows: image 3 As shown, the swirl shaft is set on the vertical wall surface of the entire vertical shaft section 3 below the contraction section 2 of the conventional vertical shaft spillway and above the exit of the lower flat section 5 along the radial direction, and is provided with 2 channels running through the whole process. Air sill 4, the aeration sill 4 gradually closes to the wall surface formed by the original radius of shaft 3 with a smooth curved surface after sudden expansion, see Figure 4 . The aeration sill 4 provided can ensure that when the water flow rotates against the wall, an aeration cavity 6 will be generated, so that the water flowing through the wall of the entire shaft 3 is aerated water flow with a high concentration of gas, so as to completely avoid the aeration of the shaft. Cavitation erosion damage occurs on the wall surface.

[0029] From Figure 5 It...

Embodiment 2

[0031] The swirl shaft of the whole process aeration provided in this embodiment is as follows: Figure 6 As shown, the difference from the fully aerated cyclone shaft given in Example 1 is that the two aeration sills 4 provided in the shaft section 3 extend all the way to the bottom plate of the shaft, which is conducive to simple construction. All the other reasons are identical with embodiment 1, slightly.

Embodiment 3

[0033] The swirl shaft of the whole process aeration provided in the present embodiment is as follows: Figure 7 , 8 As shown, the difference from the full-process aerated swirl shaft given in Example 1 is that: 1) the two aeration sills 4 set in the shaft section 3 extend all the way to the bottom plate of the shaft; 2) the shaft section 3 is provided with There are 4 aeration sills, and the 4 aeration sills are evenly distributed in the circumferential direction of the shaft section. All the other reasons are identical with embodiment 1, slightly.

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Abstract

The invention discloses a whole aeration cyclone vertical shaft which comprises a volute chamber section (1), a contraction section (2) and a vertical shaft section (3). At least one aerator (4) which penetrates the whole vertical shaft section (3) is arranged on the vertical wall surface of the vertical shaft section (3) of the cyclone vertical shaft in an outward sudden expansion manner along the radius direction of the vertical shaft section (3), smooth curved surfaces of the aerators (4) are gradually contracted to a wall surface after the aerators (4) are suddenly expanded, and the wall surface is formed by the original radius side of the vertical shaft. The whole aeration cyclone vertical shaft has the advantages that the aerators can guarantee that aeration cavities can be formed as long as water flows rotate in a wall clinging manner, so that the water flows which flow through the wall surface of the integral vertical shaft are aeration water flows containing gas with high concentration, and damage to the wall surface of the vertical shaft due to cavitation and erosion is completely prevented; the whole aeration cyclone vertical shaft is simple in structure, easy to construct and high in running safety, and the shape of the whole aeration cyclone vertical shaft is smooth and continuous.

Description

technical field [0001] The invention belongs to the technical field of aeration and corrosion reduction of swirl shafts in water conservancy projects, and in particular relates to a full-process aeration swirl shaft. Background technique [0002] The swirl shaft is an ideal choice for flood discharge and energy dissipation. So far, the research on the swirl shaft flood discharge tunnel has been relatively in-depth. A general swirling shaft spillway is composed of several parts such as an inlet section, an upper flat section, a variable slope section, a vortex chamber section, a contraction section, a shaft section, a pressure slope section, and a lower flat section (such as figure 1 shown). Its main feature is to let the water flow adhere to the wall and vortex flow to cause head loss along the way to dissipate energy, and at the same time, it will not cause atomization after the outlet of the discharge channel and serious erosion damage downstream. However, with the use o...

Claims

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Application Information

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IPC IPC(8): E02B8/06
Inventor 邓军许唯临田忠张法星张建民王韦曲景学刘善均周荗林
Owner SICHUAN UNIV
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