CN113981917B - Overflow structure of hydropower station - Google Patents
Overflow structure of hydropower station Download PDFInfo
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- CN113981917B CN113981917B CN202111316236.2A CN202111316236A CN113981917B CN 113981917 B CN113981917 B CN 113981917B CN 202111316236 A CN202111316236 A CN 202111316236A CN 113981917 B CN113981917 B CN 113981917B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 254
- 238000010276 construction Methods 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 20
- 230000006378 damage Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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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 belongs to the technical field of hydraulic and hydroelectric engineering construction technique and specifically relates to a hydropower station overflow structure is related to, and it includes dam body, overflow passageway, the shaft of intaking, goes out water shaft and siphon pipeline, the overflow passageway sets up the one side of keeping away from the dam body at the shaft of intaking, the inner wall setting along the dam body of the shaft of intaking, overflow passageway and the shaft intercommunication of intaking, it sets up the one side that deviates from the shaft of intaking at the dam body to go out the water shaft, be provided with a plurality of siphon pipelines in the shaft of intaking, dam body and the shaft intercommunication of going out water are passed to the one end of siphon pipeline. This application has the effect that reduces to power station low reaches side slope influence and destruction, improve power station flood discharge ability simultaneously.
Description
Technical Field
The application relates to the technical field of hydraulic and hydroelectric engineering construction, in particular to a hydropower station overflow structure.
Background
The hydropower station is a factory which converts potential energy and kinetic energy of water into electric energy, draws water from a reservoir and utilizes the pressure of the reservoir to drive a water turbine to rotate, converts gravity kinetic energy and kinetic energy into mechanical energy, then the water turbine drives a generator to rotate, and converts the mechanical energy into the electric energy.
In the related technology, an overflow channel is used as an important component of hydropower station flood control equipment and is generally built on one side of a dam, when the water level in a reservoir exceeds a safety limit, water flows out from the overflow channel to the downstream, the water retaining dam is prevented from being damaged, the water retaining dam of a general hydropower station can realize flood discharge by utilizing the characteristics of the water retaining dam, and the water retaining dam is provided with a meter hole which has two forms of gate control and gate control without the meter hole.
In view of the above-mentioned related technologies, the inventor believes that in a flood discharge mode in which a gate is not provided for a surface hole, the water inlet width is large in a medium and small hydropower station, particularly when a dam site is a narrow and deep river valley, and the downstream flood discharge width is large, which may affect and damage a downstream slope of the hydropower station.
Disclosure of Invention
In order to reduce the influence and the destruction to power station low reaches side slope, improve the flood discharge ability of power station simultaneously, this application provides a power station overflow structure.
The application provides a hydropower station overflow structure adopts following technical scheme:
the utility model provides a power station overflow structure, includes dam body, overflow channel, the shaft of intaking, goes out water shaft and siphon pipeline, overflow channel sets up the one side of keeping away from the dam body in the shaft of intaking, the shaft of intaking sets up along the inner wall of dam body, overflow channel and the shaft intercommunication of intaking, it sets up the one side that deviates from the shaft of intaking at the dam body to go out the water shaft, be provided with a plurality of siphon pipelines in the shaft of intaking, the one end of siphon pipeline is passed the dam body and is gone out the water shaft intercommunication.
By adopting the technical scheme, the overflow channel is arranged on one side, far away from the dam body, of the water inlet vertical shaft, redundant water flow in the reservoir can be conveniently discharged from the overflow channel, the water inlet vertical shaft is arranged on the inner wall of the dam body, the overflow channel is communicated with the water inlet vertical shaft, the impact speed of the water flow can be reduced through the water inlet vertical shaft, damage and influence to a downstream slope of the dam body caused by direct discharge from the dam body are avoided, the water outlet vertical shaft arranged corresponding to the water inlet vertical shaft can discharge the water flow flowing into the water inlet vertical shaft, the kinetic energy of the water flow can be further reduced by discharging the water flow through the siphon pipeline, the water flow entering the water outlet vertical shaft through the siphon pipeline can be gently discharged to a downstream river channel, therefore, the kinetic energy in flood discharge can be effectively reduced, meanwhile, the water level in the reservoir can be automatically discharged to the water inlet vertical shaft through the overflow channel when the water level reaches the warning water level, the water flow is discharged through the water outlet vertical shaft, the kinetic energy is continuously reduced in the discharging process until the water flow is discharged smoothly.
Optionally, the siphon pipeline includes a U-shaped pipe and a straight pipe, the U-shaped pipe is fixedly connected with the straight pipe, a water inlet is arranged at the end of the U-shaped pipe, the straight pipe is communicated with the water outlet shaft, and a water outlet is arranged at the end of the straight pipe.
By adopting the technical scheme, the siphon pipeline is arranged into the U-shaped pipe and the straight pipe which are fixedly connected, the structure is simple, and the water flow in the water inlet vertical shaft can be discharged by utilizing the water inlet at the end part of the U-shaped pipe and the water outlet at the end part of the straight pipe.
Optionally, the shaft that intakes sets up the inner wall both ends at the dam body, the bottom of the shaft that intakes is fixedly connected with fixed plate on the surface, the fixed plate sets up to opening U-shaped board down, the both sides of fixed plate and the bottom fixed surface of the shaft that intakes are connected, one of them pipeline tip of U-shaped pipe passes top and fixed plate fixed connection of fixed plate.
Through adopting above-mentioned technical scheme, set up the shaft of intaking at the inner wall both ends of dam body, can further improve the flood discharge ability of power station, at the shaft bottom fixed surface of intaking and connecting the U-shaped fixed plate, conveniently fix one of them pipeline of U-shaped pipe, avoid whereabouts rivers to lead to the fact to rock to the impact of U-shaped pipe.
Optionally, the water inlet shaft is fixedly connected with a connecting plate on the inner wall of one side of the water outlet shaft, and the connecting plate is fixedly connected with the other pipeline of the U-shaped pipe.
Through adopting above-mentioned technical scheme, at one side inner wall fixed connection connecting plate of the shaft of intaking, can realize the fixed connection to another pipeline of U-shaped pipe, avoid the impact production of whereabouts rivers to the U-shaped pipeline to rock, further strengthen the fixed to the U-shaped pipe.
Optionally, a water outlet hole is formed in the position, close to the bottom of the connecting plate, of the dam body on the inner wall of the water inlet vertical shaft, and the siphon pipeline penetrates through the water outlet hole to be communicated with the water outlet vertical shaft.
Through adopting above-mentioned technical scheme, the bottom that lies in the connecting plate on the dam body is seted up the water outlet, can pass siphon pipeline from the apopore with the water shaft intercommunication of going out, is convenient for discharge rivers from the shaft of intaking to the water shaft.
Optionally, the distance from the bent section of the U-shaped pipe to the bottom surface of the water inlet shaft is greater than the distance from the water inlet of the U-shaped pipe to the bottom surface of the water inlet shaft and greater than the distance from the straight pipe to the bottom surface of the water inlet shaft along the water outlet hole.
By adopting the technical scheme, the bottom surface of the water inlet vertical shaft is taken as a reference, the U-shaped pipe and the straight water pipe have liquid level difference, the siphon pipeline can generate siphon effect, and water in the water inlet vertical shaft flows through the water inlet of the U-shaped pipe to be sucked and is discharged through the water outlet of the straight pipe until the liquid level in the water inlet vertical shaft is lower than the water outlet of the straight pipe.
Optionally, a water blocking wall is arranged at the bottom of the overflow channel, the bottom of the water blocking wall is integrally connected with the dam body, a buffer groove is formed in the upper edge of the water blocking wall along the top inclined plane, and a fire extinguishing block is arranged on one side, far away from the buffer groove, of the water blocking wall along the top horizontal plane.
By adopting the technical scheme, the water blocking wall and the dam body are integrally connected to serve as one of important components of the hydropower station, the buffer groove is formed in the inclined plane at the top of the water blocking wall, the impact speed of water flow can be effectively reduced, and the workpiece eliminating block is arranged on one side far away from the buffer groove, so that the impact speed of water flow can be further reduced.
Optionally, a water collecting forebay is arranged between the buffer tank and the eliminating block, and an overflow bay is arranged on one side of the eliminating block close to the dam body.
Through adopting above-mentioned technical scheme, set up the forebay that catchments between the dashpot and the worker piece that disappears, can make rivers impact the dashpot and remain after short-lived the stopping and continue to flow, reduce the kinetic energy of rivers, set up the overflow pond in one side of the worker piece that disappears, can make the rivers that strike the worker piece that disappears stay again after short-lived and continue to flow, further reduce the kinetic energy of rivers.
Optionally, a filter screen is arranged on the water blocking wall along the top of the buffer tank.
Through adopting above-mentioned technical scheme, set up the rubbish debris that the upstream intermediate water stream carried in the filter screen filterable at the tank deck of dashpot, avoid causing the jam to low reaches siphon pipeline.
Optionally, a plurality of work ridges that disappear along the horizontal attached are arranged on the inner wall of the water inlet vertical shaft, and the work ridges that disappear are arranged into convex blocks.
By adopting the technical scheme, the kinetic energy generated when water flow falls can be effectively reduced by arranging the working bucket on the inner wall of the water inlet vertical shaft.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when using this application device, through adopting above-mentioned technical scheme, set up the overflow channel in the one side that the dam body was kept away from to the shaft of intaking, conveniently discharge the surplus rivers in the reservoir from the overflow channel, the shaft of intaking sets up on the inner wall of dam body, overflow channel and the shaft intercommunication of intaking, can slow down the impact velocity of rivers through the shaft of intaking, avoid directly discharging from the dam body and produce destruction and influence to dam body low reaches side slope, the play shaft that sets up with the shaft of intaking corresponds can be with the rivers discharge that flows into the shaft of intaking, utilize siphon pipeline exhaust rivers can further reduce the kinetic energy of rivers, the rivers that get into the shaft of intaking through siphon pipeline can discharge the low reaches the river course gently, consequently, kinetic energy when can effectively reduce the flood discharge, simultaneously the water level in the reservoir can be discharged to the shaft of intaking through the overflow channel automatically when reaching the warning water level, and then discharge through the shaft, and constantly reduce kinetic energy at the discharge in-process, discharge gently until discharge. (ii) a
2. By adopting the technical scheme, the siphon pipeline is arranged into the U-shaped pipe and the straight pipe which are fixedly connected, the structure is simple, and the water flow in the water inlet vertical shaft can be discharged by utilizing the water inlet at the end part of the U-shaped pipe and the water outlet at the end part of the straight pipe;
3. by adopting the technical scheme, the bottom surface of the water inlet vertical shaft is taken as a reference, the U-shaped pipe and the straight pipe have liquid level difference, the siphon pipeline can generate siphon effect, and water in the water inlet vertical shaft flows through the water inlet of the U-shaped pipe to be sucked and is discharged through the water outlet of the straight pipe until the liquid level in the water inlet vertical shaft is lower than the water outlet of the straight pipe.
Drawings
Fig. 1 is a schematic structural diagram of a main body of an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a main body at another angle in the embodiment of the present application.
Fig. 3 is a cross-sectional view of an embodiment of the present application.
Description of reference numerals: 1. a dam body; 2. an overflow channel; 21. a buffer tank; 22. eliminating the workpiece block; 23. a water collecting forebay; 24. an overflow tank; 3. a water inlet vertical shaft; 31. a fixing plate; 32. a connecting plate; 33. a water outlet hole; 34. eliminating the work bank; 4. a water outlet vertical shaft; 5. a siphon pipe; 51. a U-shaped tube; 52. a straight pipe; 6. a water retaining wall; 7. and (5) a filter screen.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The hydropower station is the mill that converts the potential energy and the kinetic energy of water in the reservoir into the electric energy, and the hydropower station generally includes retaining dam, spillway, diversion channel and power station factory building etc. and the spillway is as the important component part of hydropower station flood control equipment, and when the water level in the reservoir exceeded safe water level, rivers can follow the spillway and flow downstream, prevents that the retaining dam from being damaged, and the usable self characteristics of retaining dam of general hydropower station realize the flood discharge.
The embodiment of the application discloses power station overflow structure. Referring to fig. 1 and 2, the overflow structure of the hydropower station comprises a dam body 1, an overflow channel 2, a water inlet shaft 3, a water outlet shaft 4 and a siphon pipeline 5, wherein the overflow channel 2 is arranged on one side, far away from the dam body 1, of the water inlet shaft 3, the water inlet shaft 3 is arranged between the dam body 1 and the overflow channel 2, the water outlet shaft 4 is arranged on one side, far away from the water inlet shaft 3, of the dam body 1, and the siphon pipeline 5 is arranged in the water inlet shaft 3 and the water outlet shaft 4.
Referring to fig. 3, the overflow channel 2 is used as a main overflow structure of the hydropower station to guarantee the safe operation of the hydropower station, a water blocking wall 6 is arranged at the bottom of the overflow channel 2, the bottom of the water blocking wall 6 is integrally connected with the dam body 1, and the water blocking wall 6 is used as a main water blocking building of the hydropower station to play a vital role in blocking flood for the whole hydropower station.
In the embodiment of the application, the water retaining wall 6 is divided into two sections, the upstream section is an inclined plane, the inclined plane of the water retaining wall 6 is provided with the buffer groove 21, the buffer groove 21 is a snake-shaped groove, and the impact speed of falling water flow can be effectively reduced for the first time by utilizing the buffer groove 21; the horizontal plane is established to the downstream section of breakwater 6, sets up worker's piece 22 that disappears on the horizontal plane, and worker's piece 22 that disappears sets up the one side of keeping away from dashpot 21 on barricade 6, in the embodiment of this application, will disappear worker's piece 22 and set up the trapezoidal piece into with barricade 6 body coupling, and the direction is unanimous with barricade 6 length extending direction, utilizes the impact velocity that worker's piece 22 that disappears can reduce rivers whereabouts for the second time, reduces the kinetic energy of rivers.
A water collecting forebay 23 is arranged on the horizontal plane of the downstream section of the water retaining wall 6 between the buffer groove 21 and the water eliminating block 22, the water collecting forebay 23 is arranged into a rectangular pool along the length direction of the water retaining wall 6, so that falling water flow impacts the buffer groove 21 for a short time and then continues to flow downwards, and the kinetic energy of the water flow is reduced; one side that worker piece 22 is close to dam body 1 on retaining wall 6 is equipped with overflow tank 24, sets up overflow tank 24 to the rectangle pond the same with catchment forebay 23, in the embodiment of this application, the width dimension of overflow tank 24 is greater than the width dimension of catchment forebay 23, can make the rivers that strike worker piece 22 that disappears stay in overflow tank 24 for a short time and continue to flow, further reduces the kinetic energy of rivers.
A filter screen 7 is arranged on the water blocking wall 6 along the top of the buffer groove 21, the filter screen 7 is arranged along the length direction of the water blocking wall 6, the length of the filter screen 7 is consistent with that of the buffer groove 21, the filter screen 7 is mainly used for filtering garbage impurities carried by upstream water flow of a reservoir, the garbage impurities are prevented from flowing into the downstream water inlet vertical shaft 3 along with the water flow, a siphon pipeline 5 is blocked, and the water inlet vertical shaft 3 cannot flood discharge and normally work.
In the embodiment of the application, the inner wall of the dam body 1 is respectively provided with a water inlet vertical shaft 3 along the two ends of the length direction, the water inlet vertical shaft 3 is communicated with the downstream section of the overflow channel 2 and is used for collecting and discharging water flow discharged by the overflow channel 2 out of a hydropower station, the flood discharge capacity of the hydropower station can be further improved, the water inlet vertical shaft 3 is arranged to be a rectangular well, the height of the well mouth of the water inlet vertical shaft 3 is flush with the horizontal section of the water blocking wall 6, and the water inlet vertical shaft 3 is composed of a bottom surface and a side wall.
Fixedly connected with fixed plate 31 on the bottom surface of shaft 3 intakes, fixed plate 31 sets up to the U-shaped board that the opening faces down, the both sides board of fixed plate 31 and the bottom fixed surface of shaft 3 intakes, the top board of fixed plate 31 and siphon pipeline 5's the end fixed connection of intaking, can hold fixed connection with siphon pipeline 5's the intaking through fixed plate 31, the rivers of avoiding the whereabouts are intake to siphon pipeline 5 and are held the impact and cause the rocking, influence siphon pipeline 5's stability and life.
Fixedly connected with connecting plate 32 on the inner wall of one side that is close to outlet shaft 4 in inlet shaft 3, in the embodiment of this application, set up connecting plate 32 into the U-shaped board equally, the size of connecting plate 32 is less than the size of fixed plate 31, the outlet end fixed connection of connecting plate 32 and siphon pipeline 5 further strengthens the fixed to siphon pipeline 5 outlet end, avoids the rivers of whereabouts to 5 outlet end impact production of siphon pipeline to rock, influences siphon pipeline 5's stability and life.
The bottom of the connecting plate 32 on the dam body 1 on the inner wall of the water inlet shaft 3 is provided with a water outlet hole 33, the water inlet shaft 3 is communicated with the water outlet shaft 4 through the water outlet hole 33, the size of the water outlet hole 33 is matched with the water outlet end of the siphon pipeline 5, the water outlet end of the siphon pipeline 5 penetrates through the water outlet hole 33 to be communicated with the water outlet shaft 4, and water in the water inlet shaft 3 can be discharged into the water outlet shaft 4.
Set up a plurality of worker sills 34 that disappear along horizontal attached on the inner wall of the shaft 3 that intakes, in the embodiment of this application, will disappear worker sills 34 and set up as the lug that the cross section is triangle-shaped, can effectively reduce the impact force that rivers produced along the shaft 3 lateral wall whereabouts in-process that intakes, reduce the kinetic energy that rivers produced once more.
The water outlet shaft 4 is arranged on one side, away from the water inlet shaft 3, of the dam body 1, one water inlet shaft 3 is correspondingly provided with one water outlet shaft 4, water flow in the water inlet shaft 3 is conveniently discharged into the water outlet shaft 4, the water outlet shaft 4 is a rectangular shaft same as the water inlet shaft 3, and the water outlet shaft 4 is also composed of a bottom surface and a side wall; in this application embodiment, the bottom surface that goes out water shaft 4 and intaking shaft 3 is in same reference surface, and in rivers arrived play water shaft 4 through siphon pipeline 5, rivers need upwards do work and just can flow out play water shaft 4, have further reduced the kinetic energy of rivers, have reduced the impact force of rivers.
In the embodiment of the present application, each water inlet shaft 3 is provided with a plurality of siphon pipes 5, each siphon pipe 5 is set to be a U-shaped pipe 51 and a straight pipe 52, the U-shaped pipe 51 and the straight pipe 52 are fixedly connected together, the bottom of one of the water inlet pipes of the U-shaped pipe 51 penetrates through the top end face of the fixing plate 31 and is fixedly connected with the fixing plate 31, so as to realize the fixed connection of the water outlet pipe of the U-shaped pipe 51, thereby avoiding the impact of falling water flow on the water outlet pipe of the U-shaped pipe 51 to generate shaking, the end part of the U-shaped pipe 51 close to the fixing plate 31 is provided with a water inlet, the straight pipe 52 is provided with a water outlet at the end part of the water outlet shaft 4, and the water inlet arranged on the U-shaped pipe 51 and the water outlet arranged on the straight pipe 52 can realize the discharge of water flow in the water inlet shaft 3.
The maximum height from the top point of the bent section of the U-shaped pipe 51 to the bottom surface of the water inlet shaft 3 is greater than the height from the water inlet of the U-shaped pipe 51 to the bottom surface of the water inlet shaft 3 and greater than the height from the water inlet of the straight pipe 52 to the bottom surface of the water inlet shaft 3 along the water outlet hole 33, because the liquid level difference exists between the water inlet of the U-shaped pipe 51 and the water outlet of the straight pipe 52, when the water level of the water flow in the water inlet shaft 3 is higher than the maximum height from the top point of the bent section of the U-shaped pipe 51, a siphon effect occurs, and the water flow in the water inlet shaft 3 can be discharged to the water outlet shaft 4 through the siphon pipeline 5 until the water level in the water inlet shaft 3 is lower than the water outlet height of the straight pipe 52.
The implementation principle of the overflow structure of the hydropower station in the embodiment of the application is as follows: when the water level in the reservoir exceeds the warning limit, large garbage impurities are automatically filtered by water flow through the filter screen 7 and flow into the overflow channel 2, firstly, the impact force of a part of water flow can be reduced through the buffer groove 21, the impact force of a part of water flow is reduced when the water flow reaches the eliminating block 22 to do work on the eliminating block 22, a part of kinetic energy is consumed when the water flow is converged in the water collecting forebay 23 to do work upwards and overflow the eliminating block 22, and a part of kinetic energy is also consumed when the water flow reaches the overflow pool 24 to continue to do work upwards and overflow the overflow pool 24, so that the impact speed of the water flow is reduced when the water flow enters the water inlet vertical shaft 3, and when the water flow flows downwards along the side wall of the water inlet vertical shaft 3, the eliminating sill 34 can further block the impact of the water flow, and reduce a part of the impact force and the kinetic energy of the water flow; when the water level of the water flow in the water inlet vertical shaft 3 is higher than the top of the bent section of the U-shaped pipe 51, the siphon effect is generated by utilizing the liquid level difference between the U-shaped pipe 51 and the straight pipe 52, the water flow in the water inlet vertical shaft 3 is discharged into the water outlet vertical shaft 4 through the siphon pipeline 5, after the water flow reaches the water outlet vertical shaft 4, the water flow continues to upwards work to overflow the water outlet vertical shaft 4, the kinetic energy of the water flow is further reduced, finally, the water flow is smoothly discharged along the water outlet vertical shaft 4, a stable flood discharge state is achieved, the influence and damage on the downstream side slope of the hydropower station are reduced, and the flood discharge capacity of the hydropower station is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (3)
1. A hydropower station overflow structure, characterized in that: the water inlet shaft comprises a dam body (1), an overflow channel (2), a water inlet shaft (3), a water outlet shaft (4) and siphon pipelines (5), wherein the overflow channel (2) is arranged on one side, far away from the dam body (1), of the water inlet shaft (3), the water inlet shaft (3) is arranged along the inner wall of the dam body (1), the overflow channel (2) is communicated with the water inlet shaft (3), the water outlet shaft (4) is arranged on one side, far away from the water inlet shaft (3), of the dam body (1), a plurality of siphon pipelines (5) are arranged in the water inlet shaft (3), and one end of each siphon pipeline (5) penetrates through the dam body (1) to be communicated with the water outlet shaft (4); the siphon pipeline (5) comprises a U-shaped pipe (51) and a straight pipe (52), the U-shaped pipe (51) is fixedly connected with the straight pipe (52), a water inlet is formed in the end part of the U-shaped pipe (51), the straight pipe (52) is communicated with the water outlet vertical shaft (4), and a water outlet is formed in the end part of the straight pipe (52); the water inlet vertical shaft (3) is arranged at two ends of the inner wall of the dam body (1), a fixing plate (31) is fixedly connected to the bottom surface of the water inlet vertical shaft (3), the fixing plate (31) is a U-shaped plate with a downward opening, two sides of the fixing plate (31) are fixedly connected with the bottom surface of the water inlet vertical shaft (3), and one pipeline end of the U-shaped pipe (51) penetrates through the top of the fixing plate (31) and is fixedly connected with the fixing plate (31); the inner wall of one side of the water inlet vertical shaft (3) positioned on the water outlet vertical shaft (4) is fixedly connected with a connecting plate (32), and the connecting plate (32) is fixedly connected with the other pipeline of the U-shaped pipe (51); a water blocking wall (6) is arranged at the bottom of the overflow channel (2), the bottom of the water blocking wall (6) is integrally connected with the dam body (1), a buffer groove (21) is formed in the upper edge of the water blocking wall (6) along the top inclined plane, and a work eliminating block (22) is arranged on one side, far away from the buffer groove (21), of the water blocking wall (6) along the top horizontal plane; a water collecting forebay (23) is arranged between the buffer tank (21) and the eliminating block (22), and an overflow bay (24) is arranged on one side, close to the dam body (1), of the eliminating block (22); a filter screen (7) is arranged on the water blocking wall (6) along the top of the buffer groove (21); the inner wall of the water inlet vertical shaft (3) is provided with a plurality of transversely attached eliminating work ridges (34), and the eliminating work ridges (34) are arranged to be convex blocks.
2. The overflow construction of a hydroelectric power station of claim 1, wherein: the water outlet (33) is formed in the position, close to the bottom of the connecting plate (32), of the dam body (1) of the inner wall of the water inlet vertical shaft (3), and the siphon pipeline (5) penetrates through the water outlet (33) to be communicated with the water outlet vertical shaft (4).
3. The overflow construction of a hydroelectric power station of claim 1, wherein: the distance from the bent section of the U-shaped pipe (51) to the bottom surface of the water inlet shaft (3) is greater than the distance from the water inlet of the U-shaped pipe (51) to the bottom surface of the water inlet shaft (3), and is greater than the distance from the straight pipe (52) to the bottom surface of the water inlet shaft (3) along the water outlet hole (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111316236.2A CN113981917B (en) | 2021-11-08 | 2021-11-08 | Overflow structure of hydropower station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111316236.2A CN113981917B (en) | 2021-11-08 | 2021-11-08 | Overflow structure of hydropower station |
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| CN113981917A CN113981917A (en) | 2022-01-28 |
| CN113981917B true CN113981917B (en) | 2023-03-14 |
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| CN115387290B (en) * | 2022-08-22 | 2023-10-27 | 黄河水利职业技术学院 | Hydraulic and hydroelectric engineering overflow dam structure |
| CN115419014B (en) * | 2022-09-15 | 2024-02-23 | 广州市市政工程设计研究总院有限公司 | Regulation system and regulation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005146615A (en) * | 2003-11-14 | 2005-06-09 | Nitto Kasen Kogyo Kk | Siphon type automatic tilting device |
| CN103469772A (en) * | 2013-09-05 | 2013-12-25 | 国家电网公司 | Shaft type flood spillway for reservoirs |
| CN203411960U (en) * | 2013-09-05 | 2014-01-29 | 国家电网公司 | Glory hole spillway of reservoir |
| JP2019049182A (en) * | 2017-07-26 | 2019-03-28 | 株式会社山辰組 | Siphon water-feeding device and siphon water-feeding method |
| CN208884483U (en) * | 2018-09-29 | 2019-05-21 | 金堆城钼业股份有限公司 | A kind of mountain channel water fetching device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528475A (en) * | 2019-08-10 | 2019-12-03 | 中国水利水电第七工程局有限公司 | A water intake system for water conservancy projects |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005146615A (en) * | 2003-11-14 | 2005-06-09 | Nitto Kasen Kogyo Kk | Siphon type automatic tilting device |
| CN103469772A (en) * | 2013-09-05 | 2013-12-25 | 国家电网公司 | Shaft type flood spillway for reservoirs |
| CN203411960U (en) * | 2013-09-05 | 2014-01-29 | 国家电网公司 | Glory hole spillway of reservoir |
| JP2019049182A (en) * | 2017-07-26 | 2019-03-28 | 株式会社山辰組 | Siphon water-feeding device and siphon water-feeding method |
| CN208884483U (en) * | 2018-09-29 | 2019-05-21 | 金堆城钼业股份有限公司 | A kind of mountain channel water fetching device |
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