CN103670877B - A kind of draft tube of improvement - Google Patents
A kind of draft tube of improvement Download PDFInfo
- Publication number
- CN103670877B CN103670877B CN201310588610.3A CN201310588610A CN103670877B CN 103670877 B CN103670877 B CN 103670877B CN 201310588610 A CN201310588610 A CN 201310588610A CN 103670877 B CN103670877 B CN 103670877B
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- CN
- China
- Prior art keywords
- extension tube
- taper pipe
- circular plate
- top cover
- curved end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Rigid Pipes And Flexible Pipes (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of draft tube of improvement, comprise Taper Pipe, ell and extension tube, described Taper Pipe top inner wall circumferential surface is provided with the downward Circular Plate of opening end, the lower wall surface of this Circular Plate and Taper Pipe forms sharp clevis angle; Described extension tube is bent upwards, and form curved end, the top of this curved end is provided with the top cover that material is metal, is connected with electromagnet directly over this top cover by support, described support is also provided with the circuit switch of control circuit folding.After adopting said structure, above-mentioned Circular Plate can make the current of Taper Pipe entrance point flow down along Circular Plate, prevents the generation of wall attachment effect, reduces the loss of the water yield; The curved end of described extension tube, higher than horizontal segment, makes the horizontal segment of extension tube maintain water always, prevents the generation of cavitating.In addition, top cover can the curved end of shutoff extension tube, prevents the moisture evaporation of extension tube Yin Qinei and the cavitation erosion that occurs or foreign matters from being blocked.
Description
Technical field
The present invention relates to a kind of Component of Hydraulic Turbines, the draft tube of particularly a kind of improvement.
Background technique
Existing draft tube, in Taper Pipe inlet, easily produces wall attachment effect, and current can flow down along Taper Pipe wall, increase energy and water loss.In addition, the extension tube of draft tube is horizontally disposed with and distal opening, when current are less or dry season time, extension tube end is easily exposed outside the water surface, and air easily enters draft tube, and cavitation phenomenon occurs, meanwhile, foreign matter etc. are also easy to be entered in pipe by extension tube end, and blockage phenomenon.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and provides a kind of and can reduce water loss, prevents from cavitating and the draft tube of improvement of foreign matters from being blocked pipeline.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A draft tube for improvement, comprises Taper Pipe, ell and extension tube, and described Taper Pipe top inner wall circumferential surface is provided with the downward Circular Plate of opening end, and the lower wall surface of this Circular Plate and Taper Pipe forms sharp clevis angle; Described extension tube is bent upwards, and form curved end, the top of this curved end is provided with the top cover that material is metal, is connected with electromagnet directly over this top cover by support, described support is also provided with the circuit switch of control circuit folding.
The angle of the lower wall surface of described Circular Plate and Taper Pipe is 5-30 °.
Described top cover surface is coated with resin layer.
After the present invention adopts said structure, above-mentioned Circular Plate can make the current of Taper Pipe entrance point flow down along Circular Plate, prevents the generation of wall attachment effect, reduces the loss of the water yield; The curved end of described extension tube, higher than horizontal segment, makes the horizontal segment of extension tube maintain water always, prevents the generation of cavitating.In addition, top cover can the curved end of shutoff extension tube, prevents the moisture evaporation of extension tube Yin Qinei and the cavitation erosion that occurs or foreign matters from being blocked.
Accompanying drawing explanation
Fig. 1 is the structural representation of the draft tube of a kind of improvement of the present invention.
Wherein have: 1. Taper Pipe; 2. ell; 3. extension tube; 4. curved end; 5. Circular Plate; 6. top cover; 7. electromagnet; 8. support; 9. circuit switch.
Embodiment
Below in conjunction with accompanying drawing and concrete better embodiment, the present invention is further detailed explanation.
As shown in Figure 1, a draft tube for improvement, comprises Taper Pipe 1, ell 2 and extension tube 3, and described Taper Pipe 1 top inner wall circumferential surface is provided with the downward Circular Plate of opening end 5, this Circular Plate 5 forms sharp clevis angle with the lower wall surface of Taper Pipe 1, and this angle is preferably 5-30 °; Described extension tube 3 is bent upwards, and form curved end 4, the top of this curved end 4 is provided with the top cover 6 that material is metal, is connected with electromagnet 7 directly over this top cover 6 by support 8, described support 8 is also provided with the circuit switch 9 of control circuit folding.
In addition, top cover 6 surface is coated with resin layer.
During use, above-mentioned Circular Plate 5 can make the current of Taper Pipe 1 entrance point flow down along Circular Plate 5, prevents the generation of wall attachment effect, reduces the loss of the water yield; The curved end 4 of described extension tube 3, higher than horizontal segment, makes the horizontal segment of extension tube 3 maintain water always, prevents the generation of cavitating.In addition, top cover 6 can the curved end 4 of shutoff extension tube 3, the cavitation erosion preventing extension tube 3 from occurring because the moisture evaporation in it or foreign matters from being blocked.
The principle of the curved end 4 of top cover 6 shutoff extension tube 3 is as follows: when curved end 4 water yield is larger, impact top cover 6 is moved up, top cover 6 will clash into support 8, circuit switch 9 in support 8 is after experiencing shock, can automatically close and connect circuit, electromagnet 7 has magnetic after being energized will hold top cover 6; When curved end 4 water yield is little or non-water flow time, by anhydrous impact top cover 6, when circuit switch 9 can not experience shock, by auto-breaking, electromagnet 7 loses magnetism, and whereabouts is blocked curved end 4 because of deadweight gravity by top cover 6.
Claims (2)
1. the draft tube improved, comprise Taper Pipe (1), ell (2) and extension tube (3), it is characterized in that: described Taper Pipe (1) top inner wall circumferential surface is provided with the downward Circular Plate of opening end (5), this Circular Plate (5) forms sharp clevis angle with the lower wall surface of Taper Pipe (1); Described extension tube (3) is bent upwards, form curved end (4), the top of this curved end (4) is provided with the top cover (6) that material is metal, be connected with electromagnet (7) by support (8) directly over this top cover (6), described support (8) be also provided with the circuit switch (9) of control circuit folding; Described Circular Plate (5) is 5-30 ° with the angle of the lower wall surface of Taper Pipe (1).
2. the draft tube of improvement according to claim 1, is characterized in that: described top cover (6) surface is coated with resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310588610.3A CN103670877B (en) | 2013-11-21 | 2013-11-21 | A kind of draft tube of improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310588610.3A CN103670877B (en) | 2013-11-21 | 2013-11-21 | A kind of draft tube of improvement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103670877A CN103670877A (en) | 2014-03-26 |
| CN103670877B true CN103670877B (en) | 2016-04-27 |
Family
ID=50309442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310588610.3A Active CN103670877B (en) | 2013-11-21 | 2013-11-21 | A kind of draft tube of improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670877B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11153081A (en) * | 1997-11-21 | 1999-06-08 | Toshiba Corp | Hydraulic machinery having air supply structure |
| CN101158328B (en) * | 2007-10-12 | 2010-04-21 | 杭州电子科技大学 | Novel draft-tube and preparation method thereof |
| CN101469659B (en) * | 2007-12-26 | 2011-04-06 | 邵峥 | Water machine gas etching treatment technology |
| JP2011220269A (en) * | 2010-04-13 | 2011-11-04 | Chugoku Electric Power Co Inc:The | Water shutoff member |
| CN202266361U (en) * | 2011-08-31 | 2012-06-06 | 重庆鑫安水电设备制造有限公司 | Long tail water tube for tail water power generation |
-
2013
- 2013-11-21 CN CN201310588610.3A patent/CN103670877B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103670877A (en) | 2014-03-26 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |