CN201099853Y - Complex impedance type hydraulic power plant surge-chamber structure - Google Patents
Complex impedance type hydraulic power plant surge-chamber structure Download PDFInfo
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- CN201099853Y CN201099853Y CNU2007200915256U CN200720091525U CN201099853Y CN 201099853 Y CN201099853 Y CN 201099853Y CN U2007200915256 U CNU2007200915256 U CN U2007200915256U CN 200720091525 U CN200720091525 U CN 200720091525U CN 201099853 Y CN201099853 Y CN 201099853Y
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- Prior art keywords
- surge
- chamber
- complex impedance
- pit shaft
- chamber structure
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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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Abstract
The utility model relates to a complex impedance type hydropower station surge-chamber structure, which comprises a pit shaft (4) and a derivation conduit (3) which is communicated with the pit shaft (4). The utility model is characterized in that at least two resistances (1) are disposed in the pit shaft (4) under a water level (5). A connecting conduit (2) also can be disposed between the pit shaft (4) and the derivation conduit (3), and at least two resistances (1) are disposed in the connecting conduit (2). The complex impedance type hydropower station surge-chamber structure has the advantages that the complex impedance type hydropower station surge-chamber structure can sufficiently reflect the surge wave, can reduce the highest ground swell and upraise the lowest ground swell, saves the construction investment, and improves the operating condition when unit load changes.
Description
(1) technical field
The utility model relates to the Transient Process of Hydropower Station technical field, is specially the surge-chamber structure in the diversion and power system of power station.
(2) background technology
In order to improve water hammer, the joining place of pressing derivation conduit and pressure pipeline that has in the power station of being everlasting is built surge-chamber.Section that the surge-chamber utilization enlarges and table reflection surge wave, will have the diversion system of pressure to be divided into two sections: Upstream section is for there being the pressure diversion tunnel, and surge-chamber makes tunnel avoid the influence of surge pressure basically; Tract is a pressure pipeline, because contraction in length, thereby reduced the water attack value in the pressure pipeline, improved the service condition of unit.The function of surge-chamber can reduce following 3 points: 1, reflection surge wave.Basically avoid the surge wave in (or reducing) pressure pipeline to enter the pressure derivation conduit.2, shorten pressure pipeline length.Thereby reduce the surge pressure in pressure pipeline and the factory building overcurrent part.3, improve the service condition of unit when load variations and the power supply quality of system.
Can trace back to the early stage scholar Lei Man (Rateau) in Europe, cover and step on the contribution that theoretical foundation is made to surge-chamber such as (Gaden), Fu Lanke (Frandk) the research of surge-chamber, wherein Johnson (Johnoson) has invented differential surge chamber.
The surge-chamber structure pattern of using has simple-type, impedance type, hydroecium formula, overflow-type, differential type and air-cushion type at present, or by these several hybrid surge-chambers that combine.
Throttled surge chamber is to adopt more a kind of surge-chamber pattern, because the existence of bottom additional impedance is compared with simple-type, the water fluctuation amplitude is little in the surge-chamber, and decay is fast, and head loss is little, but relatively poor to the water attack wave reflection when normally moving.
The size in throttled surge chamber impedance hole is advisable fully reflecting surge wave in principle, otherwise can not be fully reflected surge wave, makes diversion tunnel be subjected to the influence of water attack.But there is such problem usually: on the one hand, in order fully to reflect surge wave, what the impedance hole need be provided with is bigger, but this makes that the water level lift-off value in the surge-chamber is bigger, causing has the internal water pressure design load of pressing derivation conduit and pressure pipeline to increase, thereby has increased construction investment; On the other hand, in order to reduce top surge, reducing has the internal water pressure design load of pressing derivation conduit and pressure pipeline, saves construction investment, then need with the impedance hole be provided with smaller, but this makes surge-chamber can not fully reflect surge wave again.
If surge-chamber can reduce the water-level fluctuation amplitude again effectively when fully reflecting surge wave, then such surge-chamber will be very good.
(3) technology contents
In view of the deficiency that existing throttled surge chamber exists, the purpose of this utility model is to provide a kind of can fully reflect surge wave, can effectively reduce the complex impedance type hydraulic power plant surge-chamber structure of water-level fluctuation amplitude in the surge-chamber again.
To achieve these goals, the utility model is according to following technical scheme.Complex impedance type hydraulic power plant surge-chamber structure has the throttled surge chamber structure, promptly comprises pit shaft and the derivation conduit that communicates with it, it is characterized in that in pit shaft, is provided with two impedances 1 below the water level at least.Further structure is on shaft in wall, is provided with the last chamber and following chamber that are connected with pit shaft, and is being provided with two impedances on the inwall, below the water level at least.
Further structure is between pit shaft and aqueduct tube connector to be set again, and it is provided with two impedances at least in tube connector.Further be provided with overflow weir in upper wellbore.
Superior part of the present utility model is:
1, can fully reflect surge wave.By size, number and the elevation that the impedance hole reasonably is set, surge wave is fully reflected at the surge-chamber place.
2, save construction investment.The imperial palace hydraulic pressure design load of diversion tunnel and pressure pipeline is controlled by top surge, and this point is the total characteristics of all big flows, long diversion tunnel basically.
Enough low top surge water level can fall in the surge-chamber of this kind structural shape, raise the minimum water level of surging, reduce the imperial palace hydraulic pressure design load of diversion tunnel and pressure pipeline, thereby saved the construction investment of diversion tunnel and pressure pipeline, if add because the surge-chamber that is reduced of raising of the reduction of the interior peak level of surge-chamber and lowest water level excavates and the lining project amount, the investment of saving will be more considerable.
Service condition when 3, improving the unit load variation.Can effectively reduce the water-level fluctuation amplitude in the surge-chamber, make water fluctuation decay fast and tend towards stability, abandoning under the situation of sub-load, avoided that unit is long-time at water level, regulated repeatedly under the situation about fluctuating widely, thereby improved the service condition of unit when load changes.
(4) description of drawings
Fig. 1 is provided with the simple-type surge-chamber structure schematic diagram of complex impedance for the utility model.
Fig. 2 is provided with the hydroecium formula surge-chamber structure schematic diagram of complex impedance for the utility model.
Fig. 3 is provided with the throttled surge chamber structural representation of complex impedance for the utility model.
Fig. 4 is provided with the spilling surge chamber structural representation of complex impedance for the utility model.
Among the figure: 1 impedance, 2 tube connectors, 3 derivation conduits, 4 pit shafts, 5 water levels, 6 overflow weirs, 7 times chambers, on 8 the chamber.
(5) specific embodiment
Concrete structure of the present utility model sees also accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4, can take wherein a kind of structural shape according to actual requirement of engineering.
Fig. 1 is the simple-type surge-chamber that is provided with complex impedance, promptly comprises pit shaft 4 and the derivation conduit 3 that communicates with it, it is characterized in that in pit shaft 4, water level is provided with two impedances 1 at least below 5.
Fig. 2 is the hydroecium formula surge-chamber that is provided with complex impedance, it is characterized in that on pit shaft 4 inwalls, is provided with the last chamber that is connected with pit shaft 48 and following chamber 7, and on the inwall, water level is provided with two impedances 1 at least below 5.
Fig. 3 is the throttled surge chamber that is provided with complex impedance, it is characterized in that between pit shaft 4 and aqueduct 3 tube connector 2 being set, and it is provided with two impedances 1 at least in tube connector 2.
Fig. 4 is the spilling surge chamber that is provided with complex impedance, it is characterized in that being provided with overflow weir 6 on pit shaft 4 tops of Fig. 3.
The characteristics of simple-type surge-chamber are to have identical section from top to bottom, structural shape is simple, the reflection surge wave is effective, but the junction head loss of tunnel and surge-chamber is bigger when normal operation, the amplitude of tunnel and surge-chamber middle water level fluctuation is bigger when changes in flow rate, it is slower to decay, and the volume of required surge-chamber is bigger, generally is used for the power station of low water head or low discharge more.
With the bottom of simple-type surge-chamber, couple together with the less short tube of section or aperture and tunnel and pressure pipeline, be throttled surge chamber.Because the current of turnover surge-chamber have consumed part energy at place, impedance aperture, so the water-level fluctuation amplitude has reduced, decay is accelerated, and required surge-chamber volume is less than simple-type, and the water level loss is less when normally moving.But because the existence of impedance, surge wave can not reflect fully, may be subjected to the influence of water attack in the tunnel, must select suitable impedance during design.
Overflow weir is arranged at the spilling surge chamber top.When abandoning when load, water level begins rapid rising, begins overflow after reaching overflow weir, has limited further raising of water level, helps the stable operation of unit, and the water yield of overflowing can be stored the chamber of establishing, and also can drain into the downstream.
Hydroecium formula surge-chamber by the less vertical shaft of section and up and down the reservoir chamber that enlarges of two sections form.When abandoning load, the water level in the vertical shaft rises rapidly, in case enter the bigger last chamber of section, speed long on the water level is just slowly got off immediately; When increasing load, water level is dropped rapidly to down the chamber, and replenishes the not enough water yield by following chamber, thereby limited the decline of water level, so same energy can be stored among the less volume, so the volume ratio of this surge-chamber is less, be applicable to the higher and bigger power station of reservoir drawdown of head.
By calculating and design, size, number and the elevation of complex impedance reasonably is set, can satisfy fully reflection surge wave and the requirement that reduces water level rising value in the surge-chamber effectively preferably.
Its principle is as follows: when water attack takes place when, and section that the surge-chamber utilization enlarges and table reflection surge wave.For the surge-chamber that has impedance, the abundant degree of water attack wave reflection is subjected to the influence of impedance hole size and resistance value size, the impedance bore dia is big more, resistance value is more little, and is abundant more to the water attack wave reflection.Studies show that: the size of impedance hole area is bigger to the degree of reflection influence of surge wave; The size of resistance value is less and comparatively remarkable to the influence of surging to the degree of reflection influence of surge wave.Therefore, if can improve the resistance value in aperture when not dwindling the impedance orifice area, then will significantly improve the hydraulic performance of surge-chamber, it can fully reflect surge wave on the one hand, then can effectively reduce the amplitude of surging on the other hand.Then can be implemented in this purpose that improves the aperture resistance value when not dwindling the impedance orifice area by the method that increases the impedance number, therefore, by size, number and the elevation that reasonably designs the impedance aperture, on the one hand, can keep certain impedance hole area, with abundant reflection surge wave, on the other hand, improve the aperture resistance value again, can reduce the amplitude of surging effectively.
By a plurality of impedances are set, the hydraulic performance of impedance type, overflow-type, hydroecium formula, simple-type surge-chamber is significantly improved, compare with original impedance type, overflow-type, hydroecium formula, simple-type surge-chamber, in big flow, long diversion tunnel system, tangible technology and economic advantages are arranged.
Claims (4)
1, complex impedance type hydraulic power plant surge-chamber structure has the throttled surge chamber structure, promptly comprises pit shaft (4) and the derivation conduit (3) that communicates with it, it is characterized in that being provided with at least in pit shaft (4), below the water level (5) two impedances (1).
2, complex impedance type hydraulic power plant surge-chamber structure as claimed in claim 1 is characterized in that on pit shaft (4) inwall, is provided with the last chamber (8) and following chamber (7) that are connected with pit shaft (4), and is being provided with two impedances (1) on the inwall, below the water level (5) at least
3, complex impedance type hydraulic power plant surge-chamber structure as claimed in claim 1 is characterized in that between pit shaft (4) and aqueduct (3) tube connector (2) being set, and it is provided with two impedances (1) at least in tube connector (2).
4, complex impedance type hydraulic power plant surge-chamber structure as claimed in claim 3 is characterized in that being provided with overflow weir (6) on pit shaft (4) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200915256U CN201099853Y (en) | 2007-08-17 | 2007-08-17 | Complex impedance type hydraulic power plant surge-chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200915256U CN201099853Y (en) | 2007-08-17 | 2007-08-17 | Complex impedance type hydraulic power plant surge-chamber structure |
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| Publication Number | Publication Date |
|---|---|
| CN201099853Y true CN201099853Y (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200915256U Expired - Lifetime CN201099853Y (en) | 2007-08-17 | 2007-08-17 | Complex impedance type hydraulic power plant surge-chamber structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126233B (en) * | 2007-08-17 | 2010-07-21 | 黄河勘测规划设计有限公司 | Complex impedance type hydraulic power plant surge-chamber structure |
| CN104110016A (en) * | 2014-06-18 | 2014-10-22 | 华北水利水电大学 | Piston energy-dissipation-type pressure balance chamber |
| CN104234019A (en) * | 2014-09-30 | 2014-12-24 | 武汉大学 | Cross-section-variable pressure regulating chamber |
| CN104294804A (en) * | 2014-10-13 | 2015-01-21 | 国家电网公司 | Tunnel water inlet emergency gate shaft structure |
| CN108560512A (en) * | 2018-04-23 | 2018-09-21 | 浙江水利水电学院 | Surge-chamber with flexible sudden expansion interface and impedance,motional |
-
2007
- 2007-08-17 CN CNU2007200915256U patent/CN201099853Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126233B (en) * | 2007-08-17 | 2010-07-21 | 黄河勘测规划设计有限公司 | Complex impedance type hydraulic power plant surge-chamber structure |
| CN104110016A (en) * | 2014-06-18 | 2014-10-22 | 华北水利水电大学 | Piston energy-dissipation-type pressure balance chamber |
| CN104110016B (en) * | 2014-06-18 | 2016-02-24 | 华北水利水电大学 | Piston energy dissipation type surge-chamber |
| CN104234019A (en) * | 2014-09-30 | 2014-12-24 | 武汉大学 | Cross-section-variable pressure regulating chamber |
| CN104294804A (en) * | 2014-10-13 | 2015-01-21 | 国家电网公司 | Tunnel water inlet emergency gate shaft structure |
| CN104294804B (en) * | 2014-10-13 | 2016-07-06 | 国家电网公司 | Tunnel formula water inlet emergency gate well construction |
| CN108560512A (en) * | 2018-04-23 | 2018-09-21 | 浙江水利水电学院 | Surge-chamber with flexible sudden expansion interface and impedance,motional |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yellow River Engineering Consulting Co., Ltd. Assignor: Wu Hao Contract fulfillment period: 2008.12.3 to 2015.12.3 Contract record no.: 2008410000169 Denomination of utility model: Complex impedance type hydraulic power plant surge-chamber structure Granted publication date: 20080813 License type: Exclusive license Record date: 20081208 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.3 TO 2015.12.3; CHANGE OF CONTRACT Name of requester: HUANGHE SURVEY PLANNING DESIGN CO., LTD. Effective date: 20081208 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20080813 Effective date of abandoning: 20070817 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20080813 Effective date of abandoning: 20070817 |