CN201883416U - Half air-cushion closed type siphon well - Google Patents
Half air-cushion closed type siphon well Download PDFInfo
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- CN201883416U CN201883416U CN2010206819076U CN201020681907U CN201883416U CN 201883416 U CN201883416 U CN 201883416U CN 2010206819076 U CN2010206819076 U CN 2010206819076U CN 201020681907 U CN201020681907 U CN 201020681907U CN 201883416 U CN201883416 U CN 201883416U
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- water
- air
- well
- siphon
- collecting well
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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 discloses a half air-cushion closed type siphon well. An inspection manhole is formed at the upper part of the half air-cushion closed type siphon well for sealing a top cap of the inspection manhole and a plurality of air valves; the air valves can be arranged on the top cap, so that the half air-cushion closed siphon type well is communicated with the air outside through the air valves. The half air-cushion closed siphon type well can slow down the water-level fluctuation inside the siphon well during transient process, and the scale of the siphon well can be reduced under the same circumstance of water-level fluctuation, so as to lower the construction cost; the interaction between the semi-enclosed siphon well and the air outside is reduced, spreading and transmitting channels of the water droplets and distributed salt mist in the semi-enclosed siphon well are cut off, so that the erosion to the steel structures and open-air electrical facilities near the semi-enclosed siphon well is avoided; meanwhile the water flow can not be mixed with large amount of air during falling along an overflow dam, and accordingly, the formation of massive air bubbles in the semi-enclosed siphon well is prevented.
Description
Technical field
The utility model relates to the direct-flow water supply system in power station, refers in particular to a kind of closed siphonic water-collecting well of half air cushion that is used for direct-flow water supply system.
Background technology
The general condenser type of cooling that adopts of direct-flow water supply system, its water supply flow process is generally: the female pipe-condenser of water inlet forebay-SHAPE * MERGEFORMAT circulating pump room-SHAPE * MERGEFORMAT circulating water pressure-siphonic water-collecting well-recirculated water drainage channel-drainage works well-SHAPE * MERGEFORMAT Artesian Drainage water pipe and draining head.Wherein, siphonic water-collecting well is wherein important water conservancy project structure, and the reasonability of its design directly has influence on economy, stability and the safety of whole system operation.The basic function of siphonic water-collecting well has following 2 points:
1) as shown in Figure 1, when condenser 1 layout has the suitable discrepancy in elevation with siphonic water-collecting well 2 waters surface, in condenser water box, form and keep certain siphon height, this siphonic effect can reduce the working head of circulating water pump, reduce the investment and the operating cost of pumping plant, and make the vacuum of condenser 2 and unit little increase to exert oneself keep relative stability.
2) condenser often is in the extreme higher position in the reclaimed water system, when in case the Hydraulic Transient process takes place because of outage waits in system, the condenser outlet is easy to occur lower negative pressure water hammer, and siphonic water-collecting well effect at this moment will provide the certain water level and water yield to make the condenser gutter produce the refluence siphon exactly, thereby slow down the decline of condenser outlet water hammer pressure, prevent excessive negative pressure and column separation takes place, promptly make phenomenon up, avoid the excessive water hammer pressure that makes up that reclaimed water system is damaged.
Siphonic water-collecting well not only can satisfy above-mentioned 2 basic functions, and guarantee in transient process, not occur under the blank situation of top cover overflow and water inlet pipe, dwindle the siphonic water-collecting well scale as far as possible, reduce construction investment, improve the performance driving economy and the waterpower margin of safety of system.
Siphonic water-collecting well generally is designed to the form (as shown in Figure 2) that the spacious form of standard-sized sheet or inspection manhole 3 are opened wide, and all is called the open type siphonic water-collecting well, and this siphonic water-collecting well keeps being communicated with the external world at any time, and the siphonic water-collecting well internal gas pressure is identical with external atmospheric pressure.But when reclaimed water system adopts open type siphonic water-collecting well scheme, have following shortcoming:
1) will reach the unification of function of use and security of system, the open type siphonic water-collecting well needs the bigger planar dimension and the degree of depth, and floor space is big, and engineering quantity is big, and investment is high;
2) the water hammer scarce capacity of reduction reclaimed water system, the interior water-level fluctuation of siphonic water-collecting well is big, and decay is slow;
3) occur the overflow accident in the transient process for preventing, higher well lid elevation and inspection manhole often are set, influenced the attractive in appearance of plant area;
4) power plant's current fall the back and form a large amount of little water droplet and distributed mode salt fog, and the open type siphonic water-collecting well can not stop the diffusion of water (salt) mist, cause the heavy corrosion of near steel work, open-air electric fixtures;
5) owing to communicate with atmosphere is without hindrance, current aeration when overflow weir falls is serious, make the weir after water body produce a large amount of bubbles, accumulate in the water surface and go downstream and cause visual pollution.
Summary of the invention
The utility model provides a kind of half air cushion closed siphonic water-collecting well, and it can slow down the water-level fluctuation in the siphonic water-collecting well in the transient process, reduces the scale of siphonic water-collecting well when the water-level fluctuation situation is identical, thereby reduces construction costs.
Another goal of the invention of the present utility model, increasing can minimum bore water level, has reduced the siphonic water-collecting well inner bottom plating and has revealed the possibility of empty air inlet; Reduce the highest bore water level, and then reduced the height of top cover, and reduced the height that exposes of inspection manhole, increased the aesthetic measure of plant area.
Another goal of the invention of the present utility model, it is mutual with extraneous gas to reduce semi-enclosed siphonic water-collecting well, cut off the approach that interior little water droplet of semi-enclosed siphonic water-collecting well and the diffusion of distributed mode salt fog are propagated, thereby avoided corrosion near the steel work the semi-enclosed siphonic water-collecting well, open-air electric fixtures; Simultaneously current do not have a large amount of gases and mix when overflow weir falls, and have prevented a large amount of formation of bubble in the semi-enclosed siphonic water-collecting well.
The utility model is achieved in that
The closed siphonic water-collecting well of a kind of half air cushion, its top are provided with inspection manhole, are used to seal the top cover of this inspection manhole, reach a plurality of blast gates, and this blast gate can be arranged on this top cover, and is connected with ambient atmosphere by this blast gate.
Preferably, this top cover is a removable top so that at the closed siphonic water-collecting well of half air cushion when breaking down, make things convenient for the maintainer to enter half air-cushion type siphonic water-collecting well maintenance by inspection manhole.
Preferably, the planar dimension of described siphonic water-collecting well is big more or base area is big more or elevation of top surface is high more, and the quantity of admission valve is many more.
Preferably, it includes three blast gates, and described three blast gates linearly distribute.
The utility model has following beneficial effect with respect to prior art:
1) can slow down the water-level fluctuation in the semi-enclosed siphonic water-collecting well in the transient process effectively, when the water-level fluctuation situation is identical, can reduce the scale of siphonic water-collecting well, thereby reduce construction costs;
2) system's water hammer wave amplitude rate of decay is accelerated in the transient process, and the water-level fluctuation amplitude is little in the closed siphonic water-collecting well of half air cushion, and the die-away time of fluctuation is also short, and is more favourable to the stable operation of water circulation system;
3) since the increasing of minimum bore water level reduced the possibility of the blank air inlet of well inner bottom plating, thereby increased the margin of safety of system;
4) because the reduction of the highest bore water level, can corresponding reduction cap height, cut down the height that exposes of inspection manhole simultaneously, thereby increased the aesthetic measure of plant area;
5) fundamentally eliminate little water droplet and distributed mode salt fog (sea water service system) diffusion in the siphonic water-collecting well, and can effectively prevent a large amount of formation of bubble in the well.
Description of drawings
Fig. 1 utilizes the direct-furnish water system structural representation of siphonage for prior art;
Fig. 2 is a prior art inspection manhole open type siphonic water-collecting well structural representation;
Fig. 3 is the structural representation of the closed siphonic water-collecting well of the utility model half air-cushion type;
Fig. 4 is the closed siphonic water-collecting well preferred embodiment of the utility model half an air-cushion type structural representation.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated:
As shown in Figure 3, the closed siphonic water-collecting well of the utility model half air cushion, its top is provided with inspection manhole 4, is used to seal the top cover 5 of this inspection manhole 4, reaches blast gate 6, and this blast gate 6 is arranged on this top cover 5, and is connected with ambient atmosphere by this blast gate 6.
Preferably, this top cover 5 is a removable top so that at the closed siphonic water-collecting well of half air cushion when breaking down, make things convenient for the maintainer to enter half air-cushion type siphonic water-collecting well maintenance by inspection manhole 4.
The planar dimension of described siphonic water-collecting well is big more or base area is big more or elevation of top surface is high more, and the quantity of admission valve 6 is many more.As shown in Figure 2, present embodiment is provided with three blast gates 6, wherein, the blast gate 6 that two diameters are 150mm is arranged on the top cover 5, inspection manhole 4 is in communication with the outside, and another diameter is the middle part that the blast gate 6 of 200mm is arranged at siphonic water-collecting well, and these three blast gates 6 linearly distribute.
When direct-flow water supply system stable operation, gas pressure equals local atmospheric pressure in the closed siphonic water-collecting well of half air cushion, and water level is the same with the open type siphonic water-collecting well of routine in the well, does not influence siphon utilization height.When direct-flow water supply system generation Hydraulic Transient process, the air cushion that forms in the closed siphonic water-collecting well of half air cushion then plays the effect of a braking, when the indoor water surface rises, capacity is less than inflow, the indoor gas increased pressure, having increased of gas pressure suppresses the effect that indoor water level rises, and along with the water surface rises, the brake force that suppresses the water level effect of increasing is also increasing.When the indoor water surface descended, air inflow was less than displacement, and room pressure reduces, because the effect of negative pressure can suppress drawdown.Keeping under the same water-level fluctuation situation, the comparable open type siphonic water-collecting well of the closed siphonic water-collecting well scheme of the utility model half air cushion scheme reduces planar dimension about 20%; Water hammer wave propagation (the water hammer wave amplitude rate of decay accelerates 50% approximately) in the good attenuation factor of air cushion energy that forms in the siphonic water-collecting well in the transient state can be played better protection to reclaimed water system; In addition, the closed siphonic water-collecting well of half air cushion has only the mutual of a small amount of gas with the external world, has cut off the approach that interior little water droplet of well and distributed mode salt fog (sea water service system) diffusion are propagated; The while current do not have a large amount of gases and mix when overflow weir falls, prevented a large amount of formation of bubble in the well.
Only be specific embodiment of the utility model below, do not limit protection domain of the present utility model with this; Any replacement and the improvement done on the basis of not violating the utility model design all belong to protection domain of the present utility model.
Claims (4)
1. the closed siphonic water-collecting well of one and half air cushions, its top is provided with inspection manhole, it is characterized in that, it also comprises the top cover that is used to seal this inspection manhole, and a plurality of blast gates, this blast gate is arranged on this top cover, and is connected with ambient atmosphere by this blast gate.
2. the closed siphonic water-collecting well of half air cushion as claimed in claim 1 is characterized in that this top cover is a removable top.
3. the closed siphonic water-collecting well of half air cushion as claimed in claim 1 is characterized in that, the planar dimension of described siphonic water-collecting well is big more or base area is big more or elevation of top surface is high more, and the quantity of admission valve is many more.
4. the closed siphonic water-collecting well of half air cushion as claimed in claim 1 is characterized in that it includes three blast gates, and described three blast gates linearly distribute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206819076U CN201883416U (en) | 2010-12-27 | 2010-12-27 | Half air-cushion closed type siphon well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206819076U CN201883416U (en) | 2010-12-27 | 2010-12-27 | Half air-cushion closed type siphon well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201883416U true CN201883416U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206819076U Expired - Fee Related CN201883416U (en) | 2010-12-27 | 2010-12-27 | Half air-cushion closed type siphon well |
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| CN (1) | CN201883416U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294879A (en) * | 2014-10-29 | 2015-01-21 | 中国能源建设集团广东省电力设计研究院 | Circulating water system and siphon well thereof |
| CN104563267A (en) * | 2015-01-30 | 2015-04-29 | 中国水利水电科学研究院 | Compound key overflow weir type siphon well and method implemented by same |
| CN106337401A (en) * | 2016-09-22 | 2017-01-18 | 中国水利水电科学研究院 | Flow-guide type grading energy-dissipation defoaming siphonic water-collecting well in front of weir flow and method |
-
2010
- 2010-12-27 CN CN2010206819076U patent/CN201883416U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294879A (en) * | 2014-10-29 | 2015-01-21 | 中国能源建设集团广东省电力设计研究院 | Circulating water system and siphon well thereof |
| CN104563267A (en) * | 2015-01-30 | 2015-04-29 | 中国水利水电科学研究院 | Compound key overflow weir type siphon well and method implemented by same |
| CN104563267B (en) * | 2015-01-30 | 2016-03-02 | 中国水利水电科学研究院 | A kind of compound key overflow weir formula siphonic water-collecting well and method |
| CN106337401A (en) * | 2016-09-22 | 2017-01-18 | 中国水利水电科学研究院 | Flow-guide type grading energy-dissipation defoaming siphonic water-collecting well in front of weir flow and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: GUANGDONG ELECTRIC POWER DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: Guangdong Electric Power Design Institute of CEEC Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: Company limited of China Energy Engineering Group Guangdong Electric Power Design Institute Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute of CEEC |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20171227 |