CN201461626U - Power plant circulating water system runner with submerged diversion weir - Google Patents
Power plant circulating water system runner with submerged diversion weir Download PDFInfo
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- CN201461626U CN201461626U CN2009200909150U CN200920090915U CN201461626U CN 201461626 U CN201461626 U CN 201461626U CN 2009200909150 U CN2009200909150 U CN 2009200909150U CN 200920090915 U CN200920090915 U CN 200920090915U CN 201461626 U CN201461626 U CN 201461626U
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- diversion
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Abstract
The utility model discloses a power plant circulating water system runner with a submerged diversion weir. The power plant circulating water system runner comprises a water diversion segment and a water inlet runner connected with the water diversion segment; a diversion pier is arranged at the position of an outlet of the circular arc-shaped water diversion segment; and the submerged diversion weir is disposed in the water diversion segment. By adopting the technical scheme and changing the water diversion segment into circular arc shape, the power plant circulating water system runner can save floor area, shorten the length of a water inlet runner and reduce investment. In addition, the submerged diversion weir is arranged at a proper position of the water diversion segment, and can guide and control water flow inside a bent channel when running in a water collecting basin at a low water level, thereby help inflow capability of the runner to some degree. An original U-shaped diversion weir is changed into the streamline diversion weir, and then the power plant circulating water system runner is capable of guiding flow and enabling the inflow of the runner to be even under the impact of the slow flow of the bent channel.
Description
Technical field
The utility model relates to a kind of water inlet flow channel system, specifically relates to a kind of water inlet flow channel system between the cooling tower and recycle pump priming reservoir in the power plant cooling water circulatory system that is applied in.
Background technique
In recent years, continuous expansion along with China power plant single-machine capacity, the 1000MW unit begins to build successively, because the 1000MW unit that has dropped into is less, an urgent demand is carried out theory and experimental study to the circulating water pump water inlet flow channel, to satisfy the optimal design requirement of power plant, solve the technical barrier of runner design simultaneously to Economy and occupation of land index.
Cooling tower is the free flow conveyance canal that is connected between pump chamber and the cooling tower with water inlet flow channel between the recycle pump priming reservoir, is to save to take up an area of, and flow channel length is short usually, the gradient is steeper relatively, causes easily to import and export boundary conditions and alter a great deal.The current that enter pump chamber may occur the boundary water flow point from, influent stream is unbalanced, fluidised form is unstable, causes in the pump chamber problems such as the intermittent concussion of current.If it is relatively poor to enter the flow-shape of pump chamber, hard intensity backflow and water surface concussion fluctuation in the pump chamber may appear.Many water pump various combinations open and close, and can cause the fluctuation of pump chamber water surface a period of time, and the short flow path groove effect of holding is little, and the water surface changes may be bigger.
In addition, in actual implementation process, the existing runner cooling tower radical of often postponing arranges that this kind method for arranging floor space is big, invests also big.In addition, when the catch basin low water level operation, the runner influent stream is not smooth.
Summary of the invention
Technical problems such as it is big that the utility model will solve Water of Power Plant system runner floor space, and the current fluctuation is big provide a kind of novel electric power plant circulating water system runner that has the submergence type weir.
For achieving the above object, the utility model is by the following technical solutions:
The utility model comprises diversion section and the water inlet flow channel that is connected with the diversion section, is provided with the water conservancy diversion pier in the outlet port of diversion section, and above-mentioned diversion section is a circular arc, is provided with the submergence type weir in the diversion section.
Above-mentioned submergence type weir is positioned at the downstream of water conservancy diversion pier.
For implementing the utility model better, above-mentioned water conservancy diversion pier is streamlined.
In addition, can also be provided with filter screen in the downstream of water inlet flow channel.
Adopt the utility model of technique scheme, change the diversion section into circular arc, can save floor space like this, shorten the length of water inlet flow channel, reduce investment; In addition, be provided with the submergence type weir in the appropriate location of diversion section, it is led control to current in the bend when the catch basin low water level operation, and the influent stream ability of runner is had certain help.In the utility model, original horse shoe shaped water conservancy diversion pier is changed into fairshaped, can play the effect of water conservancy diversion, under the influence that is subjected to the bend unhurried current, make that the runner influent stream is even.
Description of drawings
Fig. 1 is overall structure figure of the present utility model.
Embodiment
As shown in Figure 1, current are flowed out by the cooling tower catch basin in the upper left corner, through flow passage system of the present utility model, finally flow in the recycle pump priming reservoir on right side.
The utility model comprises diversion section 1 and the water inlet flow channel 2 that is connected with the diversion section, and wherein, diversion section 1 is a circular arc.For saving floor space, water inlet flow channel 2 and cooling tower radical can be 83 °.Current satisfy suitable compliance requirement in the runner in order to make simultaneously, and diversion section 1 and water inlet flow channel 2 are tangential on the straightway top point of water inlet flow channel 2.The external arc wall of diversion section in addition, 1 is connected with anti-segmental arc with the cooling tower joint; And the oval transition in interior circular arc wall and cooling tower joint so that the current influent stream is smooth and easy, does not produce unfavorable factors such as boundary layer separation.
In the utility model, in diversion section 1, be provided with submergence type weir 4, wherein submergence type weir 4 also is streamlined.When cooling tower catch basin normal water level, submergence type weir 4 is positioned under water.When practice of construction,, submergence type weir 4 can be arranged on the downstream of water conservancy diversion pier 3, as shown in Figure 1 owing to be provided with water conservancy diversion pier 3 in the outlet port of diversion section 1.Like this, when the catch basin normal depth of flow, submergence type weir 4 does not influence the runner influent stream; When the catch basin low water level operation, the current in the diversion section 1 are led control, improve the bad problem of influent stream condition.Test shows that submergence type weir 4 can play certain guide functions, and the influent stream ability that strengthens runner is had certain help.In addition, the flow conductivity when strengthening normal water level is designed to water conservancy diversion pier 3 streamlined, makes that the runner influent stream is even.
In addition, be provided with filter screen 5 in the downstream of water inlet flow channel 2, for confirming the effect of filter screen 5, the utility model has been done following test:
In test, implemented the obstruction simulation test of trash rack and filter screen 5 respectively.The employing trash rack blocks, make the priming reservoir water surface reach design-during the 0.70m water level, the runner water surface is basicly stable, the height of water increases and is 0.64m before and after the trash rack, flow turbulence strengthens behind the grid, the water surface has faint fluctuation; Reach in the priming reservoir design low-during the 1.61m water level, the water surface begins to have moving than high-amplitude wave, the height of water is 1.13m before and after the trash rack, flow turbulence is strong behind the grid, have hydraulic jump and aeration to take place, but bubble just spreads and separate out before grid from water, can not enter horn mouth influences water pump and normally moves.
Adopt filter screen 5 to block, when making filter screen 5 front and back water surface drops reach 15cm (10cm is a sewage-cleaning machine work drop), priming reservoir depth of water 8.21m, water level is-0.54m.Current steadily before the filter screen, the water surface has faint fluctuation behind the filter screen, and relevant data sees Table 1.
| The depth of water (m) before the filter screen | The depth of water behind the filter screen (m) | Drop (m) | Mean velocity (m/s) before the filter screen | Mean velocity behind the filter screen (m/s) |
| 8.43 | 8.28 | 0.15 | 0.38 | 0.25 |
Table 1
Claims (4)
1. electric power plant circulating water system runner that has the submergence type weir, it comprises diversion section (1) and the water inlet flow channel (2) that is connected with diversion section (1), be provided with water conservancy diversion pier (3) in the outlet port of diversion section (1), it is characterized in that: described diversion section (1) is a circular arc, is provided with submergence type weir (4) in diversion section (1).
2. the electric power plant circulating water system runner that has the submergence type weir according to claim 1, it is characterized in that: described submergence type weir (4) is positioned at the downstream of water conservancy diversion pier (3).
3. the electric power plant circulating water system runner that has the submergence type weir according to claim 2 is characterized in that: described water conservancy diversion pier (3) is for streamlined.
4. the electric power plant circulating water system runner that has the submergence type weir according to claim 1 is characterized in that: be provided with filter screen (5) in the downstream of water inlet flow channel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200909150U CN201461626U (en) | 2009-06-18 | 2009-06-18 | Power plant circulating water system runner with submerged diversion weir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200909150U CN201461626U (en) | 2009-06-18 | 2009-06-18 | Power plant circulating water system runner with submerged diversion weir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461626U true CN201461626U (en) | 2010-05-12 |
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ID=42388979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200909150U Expired - Fee Related CN201461626U (en) | 2009-06-18 | 2009-06-18 | Power plant circulating water system runner with submerged diversion weir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201461626U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082997A (en) * | 2018-07-03 | 2018-12-25 | 湖北水总水利水电建设股份有限公司 | A kind of intermountain aqueduct energy dissipator |
| CN109630404A (en) * | 2019-02-25 | 2019-04-16 | 金职液压动力(金华)有限公司 | A kind of embedded low flow resistance plunger pump cylinder body structure |
| CN110594201A (en) * | 2019-10-28 | 2019-12-20 | 江苏省水利工程科技咨询股份有限公司 | Box culvert type bidirectional flow channel internal flow line type vortex eliminating structure and vortex eliminating method thereof |
-
2009
- 2009-06-18 CN CN2009200909150U patent/CN201461626U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082997A (en) * | 2018-07-03 | 2018-12-25 | 湖北水总水利水电建设股份有限公司 | A kind of intermountain aqueduct energy dissipator |
| CN109082997B (en) * | 2018-07-03 | 2023-10-24 | 湖北水总水利水电建设股份有限公司 | Inter-mountain aqueduct energy dissipation device |
| CN109630404A (en) * | 2019-02-25 | 2019-04-16 | 金职液压动力(金华)有限公司 | A kind of embedded low flow resistance plunger pump cylinder body structure |
| CN110594201A (en) * | 2019-10-28 | 2019-12-20 | 江苏省水利工程科技咨询股份有限公司 | Box culvert type bidirectional flow channel internal flow line type vortex eliminating structure and vortex eliminating method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20130618 |