CN219157590U - Grid at bottom of power station intake - Google Patents
Grid at bottom of power station intake Download PDFInfo
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- CN219157590U CN219157590U CN202320063002.XU CN202320063002U CN219157590U CN 219157590 U CN219157590 U CN 219157590U CN 202320063002 U CN202320063002 U CN 202320063002U CN 219157590 U CN219157590 U CN 219157590U
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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 discloses a bottom grid of a water intake of a hydropower station, which comprises a dam stem and a dam, wherein the dam stem comprises a dam stem funnel, a foundation reinforcement and concrete are arranged at the dam stem funnel, the bottom grid is arranged at the dam stem funnel, the bottom grid comprises a frame structure matched with the size of the dam stem funnel, the frame structure is connected with the foundation reinforcement of the dam stem funnel, and the frame structure is embedded into the dam stem funnel; the bottom grid fence comprises an inner frame support, and the inner frame support is connected with a frame structure; the inner frame is supported in the dam stem hopper opening and anchored on the lower edge wall of the dam stem hopper opening; the bottom grid barrier comprises bars which are welded on the frame structure and are arranged at intervals along the width direction of the frame structure, and the intervals between adjacent bars form water leakage ports of the bottom grid barrier. The utility model improves the maintenance period of the bottom grid and the dam body of the water intake to 5-10 years, and effectively reduces the production stopping phenomenon caused by the blockage of the bottom grid.
Description
Technical Field
The utility model relates to the technical field of hydropower station water intake flood control facilities, in particular to a hydropower station water intake bottom grid.
Background
The design of the water intake of the small hydropower station is generally a bottom grid barrier water intake mode. The whole bottom grid barrier dam generally adopts a C30 reinforced concrete structure, a bottom grid barrier hopper opening is designed on a concrete dam stem, the bottom grid barrier adopts common 50 x 5 or 80 x 8 angle steel as a frame, and is firmly welded with concrete steel bars at the hopper opening of the dam stem, and trapezoid carbon steel (or round steel with the diameter of 32 mm) bars are welded on the frame.
However, in practical application, the design of the water intake of the bottom grid barrier dam does not consider the fierce degree of flood and debris flow in the flood season of the mountain area, and the flood discharge width and intensity of the dam are insufficient; the bottom grid is made of steel, the model is smaller, the foundation welding is unreliable, and the bottom grid can be wholly lifted or partially damaged by the debris flow due to the fact that the concrete is washed and impacted by the debris flow for a long time; the concrete at the hopper mouth of the bottom grid barrier dam peduncles (especially the peduncles of the upstream surface dam) is seriously damaged, and the repair is difficult. After the bottom grid barrier is damaged, the sediment and pebbles directly fill the whole diversion gallery, the underdrain and the sand basin, so that the power station can not take water for power generation for a long time in flood season and stop production; and secondly, the slope between the bottom grid and the dam is too large, so that the impact force on the dam is increased when the large pebbles pass the flood season, the dam concrete is damaged in a large area, and the water intake is scrapped. The prior bottom grid has to be repaired almost once every two years, and causes blockage, and can not take water for generating electricity for a long time, thus resulting in production stoppage and serious company loss.
Disclosure of Invention
The utility model aims at solving the problems, and provides a bottom grid of a water intake of a hydropower station, which comprises a dam stem and a dam, wherein the dam stem comprises a dam stem funnel, a foundation reinforcement and concrete are arranged at the dam stem funnel, the bottom grid is arranged at the dam stem funnel, the bottom grid comprises a frame structure matched with the size of the dam stem funnel, the frame structure is connected with the foundation reinforcement of the dam stem funnel, and the frame structure is embedded into the dam stem funnel; the bottom grid fence comprises an inner frame support, and the inner frame support is connected with a frame structure; the inner frame is supported in the dam stem hopper opening and anchored on the lower edge wall of the dam stem hopper opening; the bottom grid barrier comprises bars which are welded on the frame structure and are arranged at intervals along the width direction of the frame structure, and the intervals between adjacent bars form water leakage ports of the bottom grid barrier. The utility model improves the maintenance period of the whole bottom grid of the water intake and the dam to 5-10 years, and effectively reduces the production stopping phenomenon caused by the over-fast damage of the concrete of the dam due to the damage and blockage of the bottom grid.
The technical scheme adopted by the utility model is as follows:
the utility model discloses a bottom grid of a water intake of a hydropower station, which comprises a dam stem and a dam, wherein the dam stem comprises a dam stem funnel, a foundation reinforcement and concrete are arranged at the dam stem funnel, the bottom grid is arranged at the dam stem funnel, the bottom grid comprises a frame structure matched with the size of the dam stem funnel, the frame structure is connected with the foundation reinforcement of the dam stem funnel, and the frame structure is embedded into the dam stem funnel;
the bottom grid fence comprises an inner frame support, and the inner frame support is connected with a frame structure; the inner frame is supported in the dam stem hopper opening and anchored on the lower edge wall of the dam stem hopper opening;
the bottom grid barrier comprises bars which are welded on the frame structure and are arranged at intervals along the width direction of the frame structure, and the intervals between adjacent bars form water leakage ports of the bottom grid barrier.
Further, the frame structure is a rectangular frame, and the rectangular frame structure is formed by combining I-steel or rail steel and is welded with the foundation reinforcement of the dam stem hopper opening.
Further, the frame structure comprises a beam and a vertical beam, wherein the beam is arranged along the length direction of the frame structure, and a beam reinforcement frame structure is arranged at intervals of 1-2 meters; the vertical beams are arranged along the width direction of the frame structure, and according to the width of the bottom grid, only one vertical beam section steel is additionally arranged in the middle of the width direction basically.
Further, the bolt is welded on the frame structure, and the bolt adopts T-shaped carbon steel or round carbon manganese steel.
Further, the inner frame support comprises an inner frame and a support rod, the support rod is fixedly connected with the cross beam, and the support rod is connected with the inner frame and the vertical beam; the joint of the support rod and the vertical beam is the joint of the cross beam and the vertical beam.
Further, the bottom grid barrier is arranged on a dam stem of a water intake of the hydropower station, the upstream of the dam stem is a water facing surface, the downstream of the dam stem is a water facing surface, and the dam is a water facing surface; the vertical face of the upstream face is provided with a steel plate, the upper edge and the lower edge of the steel plate are firmly fixed by an anchor rod to form the vertical face of the upstream face, concrete is poured in the steel plate, and the steel plate is sealed by a plane steel plate to form the stem face of the upstream dam.
Further, a steel plate is arranged on the back surface and is paved on the downstream of the bottom grid barrier frame structure and the surface of the dam concrete to form a back dam peduncle surface; the steel plate is used for the erosion prevention treatment of the dam concrete at the lower opening of the bottom grid barrier frame structure.
Further, the lower edge of the steel plate is provided with an embedded I-steel foundation, and the I-steel foundation is used for welding and anchoring the steel plate on the water back surface; setting a water-facing surface steel plate and a water-facing surface steel plate to be welded with the frame structure; so as to achieve the effect of protecting the bottom grid against erosion of concrete on the dam stem face and the back dam stem face by debris flow, thereby achieving the effect of protecting the bottom grid firmly.
Further, the bottom grid fence is connected with a dam through the transition of the back dam peduncles, and the dam adopts flat angle steel and concrete pouring to form a dam structure; the first type of dam is a dam structure with a certain slope.
The utility model has the following technical effects:
the utility model discloses a water intake bottom grid of a hydropower station, which improves the maintenance period of the water intake bottom grid to 5-10 years, and effectively reduces the production stopping phenomenon caused by the blockage of the bottom grid. Through practice, the bottom grid barrier disclosed by the utility model has the advantages of strong practicability, low cost, durability, longer maintenance period and convenience, and can provide powerful guarantee for safe production and normal operation of a power station and create greater benefits.
The method comprises the following steps:
1. in order to treat the concrete on the dam stem surface and the back dam stem surface of the bottom grid barrier, the two concrete parts are washed by the debris flow before being wrapped by the steel plates, about 10 centimeters of the concrete can be lost, so that the frame structures on the upstream surface and the back surface of the bottom grid barrier frame are exposed, and the frame structures can be damaged by the debris flow, so that the whole bottom grid barrier is damaged. When repairing, if a layer of concrete with the density of about 10 cm is directly poured on the concrete with the damaged bottom grid barrier face facing the dam and the back dam, the problem of easy damage still exists; the utility model discloses a wrap up with the steel sheet after pouring concrete to let the end check barrier after repairing face of dam stalk face, back dam stalk face concrete obtain permanent protection, frame construction will no longer expose, and whole end check barrier is protected.
2. The bottom grid barrier frame structure adopts steel with a larger model than design as a frame, is additionally provided with a beam support in a longitudinal section, and is designed to be embedded into an inner frame to support and anchor on the lower edge wall of a funnel opening. And a vertical beam section steel is additionally arranged transversely, so that the span of the round steel bars is indirectly reduced, and the bearing capacity of the bottom grid barrier bars is enhanced.
3. The utility model ensures the flood discharge width and the flood discharge amount of the whole dam and reduces the impact force of debris flow on the dam; the dam is originally designed L and is provided with a steep bank, when the mud-rock flow large-scale pebbles pass through, the damage caused by the collision to the dam concrete is stronger, after the dam is designed to be provided with a certain slope, the mud-rock flow large-scale pebbles stably pass through, the collision is reduced, and the damage to the dam concrete is weakened. Further, the whole dam is laid with steel plates with certain strength and thickness, and the damage of the dam is further reduced.
Drawings
FIG. 1 is a schematic diagram of the whole arrangement of a steel plate wrapping protection for concrete on the upstream surface and the downstream surface of a water intake bottom grid and a dam stem hopper of a hydropower station;
FIG. 2 is a schematic diagram of a dam stem hopper mouth bottom grid arrangement of the present utility model;
the marks in the figure: 1-dam, 2-dam stalk hopper mouth, 3-bottom grid fence, 301-frame structure, 302-bolt strip, 303-beam, 304-vertical beam, 305-inner frame, 306-supporting rod, 4-face of dam stalk and 5-face of back dam stalk.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
In the present embodiment, the data is a preferred scheme, but is not intended to limit the present utility model;
in the embodiment, under the condition of meeting the condition, the flood discharge width of the dam is increased as much as possible, the impact force of debris flow on the dam is reduced, and the strength of the bottom grid steel and the concrete are considered to be 50-100 years of flood tolerance.
Example 1
As shown in fig. 1-2, the embodiment provides a bottom grid of a water intake of a hydropower station, which comprises a dam stem and a dam 1, wherein the dam stem comprises a dam stem funnel, a foundation reinforcement and concrete are arranged at the dam stem funnel, the bottom grid 2 is arranged at the dam stem funnel, the bottom grid 2 comprises a frame structure 301 matched with the size of the dam stem funnel, the frame structure 301 is connected with the foundation reinforcement of the dam stem funnel, and the frame structure 301 is embedded into the dam stem funnel;
the bottom grid 2 comprises an inner frame support connected with the frame structure 301; the inner frame is supported in the dam stem hopper opening and anchored on the lower edge wall of the dam stem hopper opening;
the bottom grid 2 comprises bars 302, the bars 302 are welded on the frame structure 301, the bars are arranged at intervals along the width direction of the frame structure 301, and the adjacent bars 302 form water leakage ports of the bottom grid 2 at intervals.
In this embodiment, after the dam stem hopper opening is cleaned, the original foundation reinforcement in the dam stem hopper opening is utilized to weld the frame structure 301 of the bottom grid 2, and the frame structure is embedded into the inner frame to support and anchor.
In this embodiment, the frame structure 301 is a rectangular frame, and 200mm i-steel or 100mm rail steel is used to form the rectangular frame structure 301, and the rectangular frame structure 301 is welded with the foundation reinforcement of the dam stem hopper opening.
In this embodiment, the frame structure 301 includes a beam 303 and a vertical beam 304, where the beam 303 is disposed along the length direction of the frame structure 301, and one beam 303 is disposed at an interval of 1-2 meters to strengthen the frame structure 301; the vertical beams 304 are arranged along the width direction of the frame structure 301, and the vertical beams 304 comprise two sections of connecting and reinforcing frame structure 301. Preferably, because the width of the frame structure 301 is typically 1-2 meters, the vertical beams 304 are added only one in the middle of the frame structure 301, and thus the vertical beams 304 must be reinforced.
In this embodiment, the bolt 302 is welded to the frame structure 301, and the bolt 302 is made of T-shaped carbon steel or round carbon manganese steel.
In this embodiment, the inner frame support extends downward 600-1000mm from the frame structure 301 of the dam stem hopper mouth, further, the inner frame support includes an inner frame 305 and a supporting rod 306, the supporting rod 306 is fixedly connected with the cross beam 303, and the supporting rod 306 is connected with the inner frame 305 and the vertical beam 304; the joint of the supporting rods 306 and the vertical beams 304 is the joint of the transverse beams 303 and the vertical beams 304, namely, the inner frame supports at the joint of the transverse beams 303 and the vertical beams 304 to play an effective supporting role, so that the overall stability of the bottom grid is enhanced.
In this embodiment, the width direction of the frame structure 301 is the water direction, the width of the bottom grille 2 is adjusted to a proper size, and the bottom grille 2 is too wide to have insufficient bearing capacity and too narrow to take water. Preferably, the width of the bottom grid 2 is set to be one to two meters, so that the bearing capacity of the bottom grid 2 is enhanced, and the supporting embedding of the inner frame of the dam stem hopper mouth is increased, so that the bottom grid 2 is not lifted or damaged locally.
Example 2
As shown in fig. 1-2, the embodiment provides a bottom grid of a water intake of a hydropower station, which comprises a dam stem and a dam 1, wherein the dam stem comprises a dam stem funnel, a foundation reinforcement and concrete are arranged at the dam stem funnel, the bottom grid 2 is arranged at the dam stem funnel, the bottom grid 2 comprises a frame structure 301 matched with the size of the dam stem funnel, the frame structure 301 is connected with the foundation reinforcement of the dam stem funnel, and the frame structure 301 is embedded into the dam stem funnel;
the bottom grid 2 comprises an inner frame support connected with the frame structure 301; the inner frame is supported in the dam stem hopper opening and anchored on the lower edge wall of the dam stem hopper opening;
the bottom grid 2 comprises bars 302, the bars 302 are welded on the frame structure 301, the bars are arranged at intervals along the width direction of the frame structure 301, and the adjacent bars 302 form water leakage ports of the bottom grid 2 at intervals.
In the embodiment, the mode of combining the steel plate and the concrete is adopted to repair the damaged concrete on the upstream surface and the downstream surface of the hopper mouth of the dam stem of the bottom grid barrier 2.
In this embodiment, the bottom grid barrier 2 is disposed on a dam stem of a water intake of a hydropower station, an upstream side of the dam stem is a water upstream side, a downstream side of the dam stem is a water back side, and the dam 1 is the water back side; a steel plate is arranged on the vertical face of the concrete dam stem at the hopper opening of the water facing surface, and preferably, a carbon steel plate with the thickness of 20mm is adopted to replace the template; setting anchor rods to stabilize the upper and lower edges of steel plates to form a vertical face of an upstream surface, pouring C30 concrete in the steel plates to repair erosion concrete and a frame structure 301, setting the steel plates to be closed, fully welding the steel plates with the upper edge of a steel film of the vertical face of the upstream surface and the frame structure 301 of the upstream surface of the bottom grid 2 to form a dam stalk surface 4, and changing the dam stalk surface 4 of the whole bottom grid 2 into steel plate-coated concrete, so that the dam stalk is enhanced in bearing debris flow impact and impact damage strength and even cannot be damaged; the back surface of the bottom grille 2 adopts a basically same arrangement mode.
In this embodiment, the back surface is also paved by a carbon steel plate with the thickness of 20mm, the dam embedded base section steel is fully welded with the 301 back surface section steel at the upper end of the steel plate, and the dam embedded base section steel is fully welded with the lower end of the steel plate to form the back dam stalk surface 5.
Further, the lower edge of the steel plate is provided with an embedded I-steel foundation, and the I-steel foundation is used for welding and fixing the steel plate on the water back surface; both the upstream and downstream steel plates are welded to the frame structure 301.
In the embodiment, the dam facing peduncles 4 and 5 of the bottom grid barrier 2 are wrapped by steel plates and welded with the frame structure 301 of the bottom grid barrier 2, and an integrated smooth structure is formed after the connection, so that erosion of mud-rock flow to concrete of the dam facing peduncles 4 and 5 of the bottom grid barrier is avoided, and impact force of the mud-rock flow to the bottom grid barrier 2 is reduced.
In this embodiment, the bottom grid 2 is in transition with the back dam peduncle 5 and is connected with the dam 1, the dam 1 adopts flat angle steel and concrete pouring to form a dam 1 structure, the dam of the first type is a dam structure with a certain slope, and a stable transition surface is formed between the bottom grid 2 and the dam 1.
In this embodiment, unlike the prior art, the prior art 1 adopts an L-shaped dammann 1 structure, where the L-shaped dammann 1 is a dammann 1 structure with a steep slope, and the concrete and the bottom grid 2 are easily damaged under the condition of debris flow impact; in the present embodiment, as shown in fig. 1, a back dam stalk surface 5 is provided between the bottom grille 2 and the dam 1 as a transition, and the height difference between the bottom grille 2 and the dam 1 is adjusted.
In this embodiment, when repairing the dam 1 on the back surface of the bottom grid barrier 2, only the flat dam 1 with a certain gradient is considered to be formed with the dam stems, and no sudden drop height difference exists, so that the smooth passing of large pebbles is facilitated, the impact is reduced, and the dam 1 is protected. Preferably, the whole dam 1 is anchored by a layer of steel plate or rail steel.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (9)
1. The bottom grid barrier of the water intake of the hydropower station comprises a dam stem and a dam, wherein the dam stem comprises a dam stem funnel, and the dam stem funnel is provided with basic steel bars and concrete;
the bottom grid fence comprises an inner frame support, and the inner frame support is connected with a frame structure; the inner frame is supported in the dam stem hopper opening and anchored on the lower edge wall of the dam stem hopper opening;
the bottom grid barrier comprises bars which are welded on the frame structure and are arranged at intervals along the width direction of the frame structure, and the intervals between adjacent bars form water leakage ports of the bottom grid barrier.
2. The grid of a hydroelectric power station according to claim 1, wherein the frame structure is a rectangular frame, and the rectangular frame structure is formed by combining i-steel or rail steel, and is welded with a foundation reinforcement of a dam stem hopper opening.
3. The hydroelectric power station water intake bottom grid according to claim 2, wherein the frame structure comprises cross beams and vertical beams, the cross beams are arranged along the length direction of the frame structure, and a cross beam reinforcement frame structure is arranged at intervals of 1-2 meters; the vertical beam is arranged along the width direction of the frame structure and comprises two sections of connecting and reinforcing frame structures.
4. A hydroelectric power station water intake bottom grid according to claim 3, wherein the bolt is welded on the frame structure, and the bolt is made of T-shaped carbon steel or circular carbon manganese steel.
5. The grid of a hydroelectric power station water intake according to claim 4, wherein the inner frame support comprises an inner frame and a support rod, the support rod is fixedly connected with the cross beam, and the support rod is connected with the inner frame and the vertical beam; the joint of the support rod and the vertical beam is the joint of the cross beam and the vertical beam.
6. The bottom grid of a water intake of a hydropower station according to claim 1 or 5, wherein the bottom grid is arranged on a dam stem of the water intake of the hydropower station, upstream of the dam stem is a water-facing surface, downstream of the dam stem is a water-facing surface, and the dam is a water-facing surface; the vertical face of the upstream face is provided with a steel plate, the upper edge and the lower edge of the steel plate are firmly fixed by an anchor rod to form the vertical face of the upstream face, concrete is poured in the steel plate, and the steel plate is sealed by a plane steel plate to form the stem face of the upstream dam.
7. The hydroelectric power station water intake bottom grid of claim 6, wherein the back surface is provided with a steel plate which is laid on the downstream of the bottom grid frame structure and on the surface of the dam concrete to form a back dam stalk surface.
8. The grid of a hydroelectric power station water intake bottom grid according to claim 7, wherein the water back surface is provided with a lower edge embedded I-steel foundation of the steel plate, and the I-steel foundation is used for welding and anchoring the steel plate on the water back surface; and arranging a water facing surface steel plate and a water facing surface steel plate to be welded with the frame structure.
9. The bottom grid of the water intake of the hydropower station according to claim 8, wherein the bottom grid is connected with a dam through the transition of the back dam stem surface, and the dam is poured by adopting flat angle steel and concrete to form a dam structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320063002.XU CN219157590U (en) | 2023-01-09 | 2023-01-09 | Grid at bottom of power station intake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320063002.XU CN219157590U (en) | 2023-01-09 | 2023-01-09 | Grid at bottom of power station intake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219157590U true CN219157590U (en) | 2023-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320063002.XU Active CN219157590U (en) | 2023-01-09 | 2023-01-09 | Grid at bottom of power station intake |
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| Country | Link |
|---|---|
| CN (1) | CN219157590U (en) |
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2023
- 2023-01-09 CN CN202320063002.XU patent/CN219157590U/en active Active
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