CN202441536U - Pressure adjusting device for hydropower station - Google Patents
Pressure adjusting device for hydropower station Download PDFInfo
- Publication number
- CN202441536U CN202441536U CN2012200717612U CN201220071761U CN202441536U CN 202441536 U CN202441536 U CN 202441536U CN 2012200717612 U CN2012200717612 U CN 2012200717612U CN 201220071761 U CN201220071761 U CN 201220071761U CN 202441536 U CN202441536 U CN 202441536U
- Authority
- CN
- China
- Prior art keywords
- air bag
- pressure adjusting
- water
- adjusting device
- power plant
- 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.)
- Expired - Fee Related
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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
Abstract
The utility model relates to a pressure adjusting device for a hydropower station. The pressure adjusting device is an air bag; and a concrete shell is arranged outside the air bag. The air bag is arranged at a fourth quadrant of a volute. The pressure adjusting device for the hydropower station can be used for replacing the traditional pressure adjusting chamber and eliminating positive and negative water hammer and can further decrease work amount, thereby saving investment.
Description
Technical field
The utility model relates to a kind of water power plant regulator.
Background technique
In the hydroelectric station operation process,, produce positive and negative water hammer in the aqueduct of being everlasting because the change of water power plant load causes the change of flow rate of water flow size, direction even motion state in the aqueduct.Positive water hammer is very big to the influence of flow passage components such as pressure piping, unit, spiral case, unit operation, possibly cause pipeline strength to destroy, and pressure is too high, will cause breaking of pipe.And negative water hammer can make pressure cross the low bulge that can cause pipeline and unstability, and the unit judder produces noise, and system's operation is unstable, and might damage Valve joint.
In run-of-river power station is arranged, be everlasting and pressed diversion tunnel and pressure piping intersection that surge-chamber is set, to reduce water hammer pressure, guarantee that unit operation is stable.Yet though surge-chamber can be cut down positive and negative water hammer, technical difficulty is big, and engineering work load is big, and construction is difficult, and cost is high.Particularly for medium waterpower generator station, the cost of surge-chamber possibly account for the sizable ratio of whole engineering, and the development of surge-chamber is played restriction and hinders.
Also once adopted reduction valve in order to substitute surge-chamber in China's medium waterpower generator station.But finally, finally abandons by this old-fashioned reduction valve, so this reduction valve seldom adopts so far because can not cutting down negative water hammer.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of water power plant regulator, can replace traditional surge-chamber, subdues positive and negative water hammer, more can reduce engineering work load, reduces investment outlay.
The above-mentioned purpose of the utility model is to realize through such technological scheme: a kind of water power plant regulator, said regulator are air bag, and said air bag outside is provided with concrete casing.
Said air bag is installed in the four-quadrant of spiral case.
A kind of water power plant of the utility model regulator is set up the pressure regulation air bag as regulator, is installed in the spiral case place.Can not only subdue positive water hammer under the load condition losing, and can also when increasing load, effectively subdue negative water hammer.Can replace surge-chamber, and cost is low, less investment is convenient in medium and small water power plant, promote.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Fig. 1 is the utility model water power plant regulator scheme of installation;
Fig. 2 is the utility model water power plant regulator working state figure one;
Fig. 3 is the utility model water power plant regulator working state figure two;
Wherein: 1, movable guide vane, 2, control valve, 3, draft tube, 4, air bag, 5, spiral case.
Embodiment
A kind of water power plant regulator, said regulator are air bag 4, and said air bag 4 outsides are provided with concrete casing.Aspect air bag 4 selections, optional usefulness has certain plastoelastic engineering rubber, makes full use of rubber material and has good elastoplasticity advantage and regulate water hammer.
Working principle:
At spiral case 5 four-quadrant places, the utility model regulator is installed.Can draw the utility model regulator through analysis of model tests and be placed in spiral case 5 four-quadrant places, pressure regulation plays a role clearly, and constructs, safeguards all more convenient.Can cut down positive and negative water hammer well, protection pipeline and water turbine safety.
Under the various operating modes in water power plant, regulate positive and negative water hammer through air bag 4.When control valve 2 is closed suddenly fully (losing load), begin to change near water body in the valve pipeline section, the speed vanishing, pressure rises to H
0+
△H.Meanwhile, water body is compressed, and tube wall expands, thereby vacating space is able to hold upstream line still with V
0The water body that velocity flow is come, when the water hammer ripple passed to air bag 4, water body can charge into air bag 4 inside, thereby eliminated positive water hammer.
In like manner, when valve is opened suddenly, (increase load), begin to change near water body in control valve 2 pipeline sections, speed becomes V
0, manifold pressure drops to H
0-
△Negative pressure of vacuum appears in H in the pipeline, the water body in the air bag 4 refluxes and can remedy negative pressure at this moment, thereby eliminates negative water hammering.
Working procedure:
Wherein, when load was lost in the water power plant, as shown in Figure 2, movable guide vane 1 was closed suddenly, and malleation appears in pipe interior, and at this moment, air bag 4 can be cut down the positive water hammer of part through the expansion receiver portion water yield of self, plays the effect that reduces malleation.
When the water power plant increased load, as shown in Figure 3, movable guide vane 1 was opened suddenly; Because the pipe interior water shortage is prone to produce negative pressure, at this moment; Air bag 4 just can add in the pipeline through the part water yield that self contraction will store, thereby reduces negative pressure, cuts down negative water hammer.Air bag 4 outsides are the strong concrete shell, play restricted internal air bag 4 volumes and as protective gear.
Claims (2)
1. water power plant regulator, it is characterized in that: said regulator is air bag (4), said air bag (4) outside is provided with concrete casing.
2. according to the said a kind of water power plant of claim 1 regulator, it is characterized in that: said air bag (4) is installed in the four-quadrant of spiral case (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200717612U CN202441536U (en) | 2012-03-01 | 2012-03-01 | Pressure adjusting device for hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200717612U CN202441536U (en) | 2012-03-01 | 2012-03-01 | Pressure adjusting device for hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202441536U true CN202441536U (en) | 2012-09-19 |
Family
ID=46822989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200717612U Expired - Fee Related CN202441536U (en) | 2012-03-01 | 2012-03-01 | Pressure adjusting device for hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202441536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256776A (en) * | 2015-11-09 | 2016-01-20 | 三峡大学 | Water bag type water diversion pressure adjustment chamber |
-
2012
- 2012-03-01 CN CN2012200717612U patent/CN202441536U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256776A (en) * | 2015-11-09 | 2016-01-20 | 三峡大学 | Water bag type water diversion pressure adjustment chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20140301 |