CN217105426U - Drainage structure of underground powerhouse of hydropower station - Google Patents
Drainage structure of underground powerhouse of hydropower station Download PDFInfo
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- CN217105426U CN217105426U CN202121357147.8U CN202121357147U CN217105426U CN 217105426 U CN217105426 U CN 217105426U CN 202121357147 U CN202121357147 U CN 202121357147U CN 217105426 U CN217105426 U CN 217105426U
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- drainage
- cavern
- pump room
- hydropower station
- water collecting
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Abstract
The utility model provides a drainage structure of a hydropower station underground workshop, which comprises a water collecting well, a drainage pump room positioned above the water collecting well and a drainage cavern connected with the drainage pump room; a drainage pipeline connected with a drainage pump in the drainage pump room is laid on the ground of the drainage cavern and is fixed through a retaining ridge arranged on the ground of the drainage cavern; the drainage cavern is also provided with an overflow channel which is positioned below the ground and communicated with the water collecting well. This technical scheme not only can reduce the arrangement elevation of power station factory building outer drainage cavern as far as possible, and reduce cost can also prevent that the drainage from flowing back to the factory building in, can also still freely drain water under the water logging factory building condition simultaneously, guarantees the normal operating of factory building.
Description
Technical Field
The utility model relates to a drainage structure of power station underground factory building.
Background
The arrangement elevation of the underground powerhouse of the hydropower station is often lower, and drainage structures including a leakage drainage structure and a unit overhaul drainage structure are required to be arranged to ensure the production operation of internal equipment of the powerhouse and the working environment of personnel. The common method is to arrange a drainage hole outside the hole in a sloping direction, and then to drain accumulated water to the drainage hole to realize self-flowing drainage. The arrangement of the drainage holes is more critical, on one hand, the arrangement elevation needs to be reduced as much as possible so as to reduce the pumping and drainage lift and save the cost in the normal operation period, and on the other hand, the drainage can be automatically performed as early as possible under the extreme condition of flooding the plant so as to improve the safety of the underground plant; on the other hand, the arrangement height also needs to be as high as possible so as to meet the flood control safety and prevent flood from flowing back to the factory building.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the shortcoming that exists among the prior art, provide one kind and satisfy on the basis of flood control safety, not only can prevent that the drainage from flowing back to the factory building in, but also can guarantee still can free drainage's power station underground powerhouse drainage structures under the water logging factory building condition.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a drainage structure of an underground powerhouse of a hydropower station comprises a water collecting well, a drainage pump room positioned above the water collecting well and a drainage cavern connected with the drainage pump room; a drainage pipeline connected with a drainage pump in the drainage pump room is laid on the ground of the drainage cavern and is fixed through a retaining ridge arranged on the ground of the drainage cavern; the drainage cavern is also provided with an overflow channel which is positioned below the ground and communicated with the water collecting well.
Furthermore, an overflow hole is formed in the upper portion of the side wall, close to the drainage cavity, of the water collecting well, and the overflow channel is connected with the overflow hole.
Furthermore, the overflow channel is positioned between the blocking ridge and the hole connected with the drainage hole chamber and the drainage pump room.
Furthermore, the elevation of the blocking ridge meets the requirement of being as low as possible on the premise of blocking the drainage backflow in the drainage cavern.
Furthermore, the height of the overflow hole is lower than the height of the top surface of the retaining ridge.
Further, the arrangement height of the drainage pump is higher than the top surface height of the baffle ridge.
Furthermore, the outlet of the drainage pipeline extends out of the blocking ridge for a certain distance.
Furthermore, an overhaul patrol door is arranged between the drainage pump room and the drainage cavern, and an overhaul patrol channel extends to the stop ridge from the drainage pump room.
The utility model has the advantages that: under the condition of normal operation working conditions, the drainage structure can pump and drain accumulated water to a drainage chamber outside the plant, and water is automatically drained outside the plant under the action of the retaining ridge; meanwhile, a very small amount of splashed water which turns over the retaining bank flows back into the water collecting well, and no water is accumulated in the cavity; if under the extreme condition of flooding the factory building such as the diversion conduit breaks, after the flooding elevation reaches the intersection elevation of the water collecting well and the underground factory building external drainage cavern along with the factory building internal flooding elevation, the water in the factory building can be through the overflow hole then turn over the concrete bank and realize the artesian drainage. Therefore, the technical scheme can reduce the arrangement elevation of the external drainage cavern of the hydropower station plant as much as possible, reduce the cost, deal with various conditions and effectively drain water, and ensure the normal operation of the plant.
Drawings
Fig. 1 is a longitudinal sectional view of the present invention.
Fig. 2 is a cross-sectional view of the present invention at fig. 1 a-a.
Fig. 3 is a cross-sectional view of the present invention at fig. 1 b-b.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The drainage structure of the present embodiment includes a water collection well 2, a drainage pump house 3 provided with a drainage pump 6, and an external drainage cavern 1 provided with a drainage pipe 7. The drainage pump room 3 is positioned above the water collecting well 2, and a hole 11 at one side of the drainage cavern 1 is communicated with the drainage pump room 3 and the upper part of the water collecting well 2. Specifically, the drainage pipeline 7 is connected with the drainage pump 6, is connected out of the drainage pump room 3 and is laid along the ground of the drainage cavern 1, and the ground of the drainage cavern 1 is also provided with a concrete baffle 4 for fixing the drainage pipeline 7. The drainage pump room 3 is provided with an inspection and patrol door 9, and an inspection and patrol channel 8 extends from the drainage pump room 3 to the concrete baffle ridge 4, so that better inspection and traffic conditions can be ensured. An overflow hole 5 is arranged above the side wall of the water collecting well 2 close to the drainage cavern 1, the lower part of a cave mouth 11 of the drainage cavern 1 connected with the drainage pump room 3 is connected with the overflow hole 5 to form an overflow channel 10, and the overflow channel 10 is positioned behind the concrete baffle ridge 4.
Wherein, the height of concrete keeps off bank 4 should satisfy: the elevation of the concrete baffle ridge 4 needs to be determined through calculation, and the water level does not exceed the top surface of the concrete baffle ridge 4 under the condition of meeting the maximum drainage flow when the drainage structure is leaked and overhauled and started simultaneously; moreover, the elevation of the concrete baffle ridge 4 needs to be as low as possible on the premise of blocking the backflow of the drained water, otherwise, the flooding loss in the plant becomes large under extreme conditions such as flooding the plant. Therefore, after the drainage pipeline 7 arranged in the drainage chamber 1 passes through the concrete baffle 4, the water can be dispersed and drained into the chamber. The top surface elevation design of the concrete baffle 4 can meet the requirement that the drainage pipeline 7 cannot overflow under the condition of the maximum drainage flow.
The height of the overflow aperture 5 should be lower than the height of the top surface of the concrete sill 4. Therefore, the overflow holes 5 can allow a very small amount of splashed water which turns over the concrete baffle 4 to flow back into the water collecting well 2, and on the other hand, under the extreme conditions of a flooded workshop and the like, when the water level in the water collecting well 2 continuously rises, the water in the water collecting well 2 can be automatically drained into the drainage chamber 1 outside the underground workshop through the overflow holes 5. In addition, the area of the overflow hole 5 is basically equivalent to the section of the external drainage cavern 1 of the factory building, so that the drainage capacities of the overflow hole 5 and the external drainage cavern 1 are basically matched under the extreme conditions of flooding the factory building and the like.
The arrangement height of the drainage pump 6 is properly higher than the top surface height of the concrete baffle ridge 4, so that the drainage pump blades can be prevented from being impacted by water flowing backwards in a pipeline connected with the drainage pump 6, and the drainage pump 6 is prevented from being damaged.
In addition, the outlet of the drainage pipeline 7 is positioned in front of the concrete baffle ridge 4 and extends out of the concrete baffle ridge 4 for a certain distance, so that the influence of turbulent flow caused by vortex near the outlet of the drainage pipeline 7 on the water surface of the front edge of the concrete baffle ridge 4 is reduced.
It should be noted that the above describes exemplifying embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and the changes and modifications are intended to fall within the scope of the present invention as claimed.
Claims (7)
1. A drainage structure of an underground powerhouse of a hydropower station is characterized by comprising a water collecting well, a drainage pump room positioned above the water collecting well and a drainage cavern connected with the drainage pump room; a drainage pipeline connected with a drainage pump in the drainage pump room is laid on the ground of the drainage cavern and is fixed through a retaining ridge arranged on the ground of the drainage cavern; the drainage cavern is also provided with an overflow channel which is positioned below the ground and communicated with the water collecting well.
2. The drainage structure of an underground powerhouse of a hydropower station according to claim 1, wherein an overflow hole is formed above the side wall of the water collecting well close to the drainage chamber, and the overflow channel is connected with the overflow hole.
3. The drainage structure of an underground powerhouse of a hydropower station according to claim 1, wherein the overflow passage is located between the sill and the opening connecting the drainage cavern and the drainage pump room.
4. The drainage structure of an underground powerhouse of a hydropower station according to claim 1, wherein the height of the overflow channel is lower than the height of the top surface of the weir.
5. The drainage structure of underground powerhouse of hydropower station as claimed in claim 1, wherein the drainage pump is arranged at a height higher than the top surface of the weir.
6. The drainage structure of an underground powerhouse of a hydropower station according to claim 1, wherein the outlet of the drainage pipeline extends out of the weir by a distance.
7. The drainage structure of the underground powerhouse of the hydropower station according to claim 1, wherein an inspection and inspection door is arranged between the drainage pump room and the drainage chamber, and an inspection and inspection channel extends from the drainage pump room to the stop ridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121357147.8U CN217105426U (en) | 2021-06-18 | 2021-06-18 | Drainage structure of underground powerhouse of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121357147.8U CN217105426U (en) | 2021-06-18 | 2021-06-18 | Drainage structure of underground powerhouse of hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217105426U true CN217105426U (en) | 2022-08-02 |
Family
ID=82576372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121357147.8U Active CN217105426U (en) | 2021-06-18 | 2021-06-18 | Drainage structure of underground powerhouse of hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217105426U (en) |
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2021
- 2021-06-18 CN CN202121357147.8U patent/CN217105426U/en active Active
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