CN201873973U - Energy dissipater structure in water transporting tunnel - Google Patents
Energy dissipater structure in water transporting tunnel Download PDFInfo
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- CN201873973U CN201873973U CN2010206119276U CN201020611927U CN201873973U CN 201873973 U CN201873973 U CN 201873973U CN 2010206119276 U CN2010206119276 U CN 2010206119276U CN 201020611927 U CN201020611927 U CN 201020611927U CN 201873973 U CN201873973 U CN 201873973U
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Abstract
本实用新型涉及一种输水洞洞内消能工结构。本实用新型所要解决的技术问题是提供一种结构简单、消能效果好的输水洞洞内消能工结构，保证不同流量下出池水位的稳定，以达到降低水面波动，确保水面平稳的目的。解决该问题的技术方案是：输水洞洞内消能工结构，具有上游输水管道和下游输水隧洞，其特征在于：所述上游输水管道出水口处布置工作闸室，工作闸室下游侧依次布置下抛物线形泄槽和消力池与下游输水隧洞连通，所述消力池内部靠近下游侧设置稳水消波格栅，尾部设置差动式尾坎。本实用新型主要适用于水利水电工程泄洪消能建筑物，特别是流速高、上游水位变幅大的水利水电工程。
The utility model relates to an energy dissipating structure in a water delivery tunnel. The technical problem to be solved by the utility model is to provide an energy dissipation structure in the water delivery tunnel with a simple structure and good energy dissipation effect, so as to ensure the stability of the water level of the outlet pool under different flow rates, so as to reduce the fluctuation of the water surface and ensure the stability of the water surface. Purpose. The technical solution to solve this problem is: the energy dissipation structure in the water delivery tunnel has an upstream water delivery pipeline and a downstream water delivery tunnel, and is characterized in that a working lock chamber is arranged at the outlet of the upstream water delivery pipeline, and the working lock chamber On the downstream side, a lower parabolic discharge chute and a stilling basin are arranged in turn to communicate with the downstream water delivery tunnel. The interior of the stilling basin is equipped with a water stabilizing and wave dissipation grill near the downstream side, and a differential tail sill is arranged at the tail. The utility model is mainly suitable for flood discharge and energy dissipation buildings of water conservancy and hydropower projects, especially water conservancy and hydropower projects with high flow velocity and large fluctuation of upstream water level.
Description
技术领域technical field
本实用新型涉及一种输水洞洞内消能结构，主要用于水利水电工程泄洪消能建筑物，特别是流速高、上游水位变幅大的水利水电工程。The utility model relates to an energy-dissipating structure in a water delivery tunnel, which is mainly used for flood discharge and energy-dissipating buildings in water conservancy and hydropower projects, especially in water conservancy and hydropower projects with high flow velocity and large amplitude variation of upstream water levels.
背景技术Background technique
输水工程，大部分时段在高水位、小开度的工况下运行，闸门出口水流流速较高，为了满足不同的上游水位及输水量情况下，下游输水管道水流的稳定性，要求经下游消能后水流或水位平稳，因此消能必须充分。目前在国内，针对输水规模较小的工程，最常见的是采用消能阀消能形式，而对于输水规模较大的工程，消能阀投资及运行维护就显得不够优越，而采用常规的消力池消能又很难达到不同水位、流量情况下，出池水流或水位的平稳。Water delivery projects operate under high water level and small opening conditions for most of the time, and the water flow velocity at the gate outlet is relatively high. In order to meet the different upstream water levels and water delivery conditions, the stability of the downstream water delivery pipeline water flow requires After downstream energy dissipation, the water flow or water level is stable, so the energy dissipation must be sufficient. At present, in China, energy dissipation valves are the most common form of energy dissipation for small-scale water transmission projects. For large-scale water transmission projects, the investment and operation and maintenance of energy dissipation valves are not superior enough, and conventional It is difficult to achieve the stability of the water flow or water level in the pool under different water levels and flow conditions.
发明内容Contents of the invention
本实用新型要解决的技术问题是：针对上述存在的问题提供一种结构简单、消能效果好的输水洞洞内消能工结构，保证不同流量下出池水位的稳定，以达到降低水面波动，确保水面平稳的目的。The technical problem to be solved by the utility model is to provide an energy dissipation structure in the water delivery tunnel with a simple structure and good energy dissipation effect in view of the above existing problems, so as to ensure the stability of the water level of the outlet pool under different flow rates, so as to reduce the water surface Fluctuation, the purpose of ensuring the stability of the water surface.
本实用新型所采用的技术方案是：输水洞洞内消能工结构，具有上游输水管道和下游输水隧洞，其特征在于：所述上游输水管道出水口处布置工作闸室，工作闸室下游侧依次布置下抛物线形泄槽和消力池与下游输水隧洞连通，所述消力池内部靠近下游侧设置稳水消波格栅，尾部设置差动式尾坎。The technical scheme adopted by the utility model is: the energy dissipation structure in the water delivery tunnel has an upstream water delivery pipeline and a downstream water delivery tunnel, and is characterized in that: a working lock chamber is arranged at the outlet of the upstream water delivery pipeline, and the working On the downstream side of the sluice chamber, a lower parabolic discharge chute and a stilling basin are arranged in sequence to communicate with the downstream water delivery tunnel. Inside the stilling basin, near the downstream side, a water-stabilizing and wave-dissipating grille is arranged, and a differential tail sill is arranged at the tail.
所述下游输水隧洞进水口处设置稳水消波格栅。A water stabilizing and wave-eliminating grille is arranged at the water inlet of the downstream water conveyance tunnel.
位于消力池内部的稳水消波格栅为一层，位于下游输水隧洞进水口处的稳水消波格栅布置成若干层。The water-stabilizing and wave-eliminating grids located inside the stilling basin are arranged in one layer, and the water-stabilizing and wave-eliminating grids located at the water inlet of the downstream water conveyance tunnel are arranged in several layers.
所述差动式尾坎由一组相互间隔的高坎和低坎组成。The differential tail sill is composed of a set of high sills and low sills spaced apart from each other.
本实用新型的有益效果是：本实用新型在消力池尾部设置差动式尾坎(高坎和低坎组成)，能够很好的适应不同流量的水流，降低了坎前后的水位差，提高了输水工程洞内消能的效率，同时，由于水跃消能消力池上部水体基本为水汽混合物，水流在过差动式尾坎后可有效的将气体滤出，大大减少了隧洞的进气量；布置在消力池中的稳水消波格栅，可有效的降低消力池内的水面波动，并增加消能效率；布置于下游隧洞进口前的稳水消波格栅，能够有效降低水面波动，确保水面平稳，且起到消窝梁的作用，降低了吸气漩涡发生的可能性。The beneficial effects of the utility model are: the utility model sets a differential tail sill (composed of a high sill and a low sill) at the tail of the stilling pool, which can well adapt to water flows of different flows, reduces the water level difference before and after the sill, and improves At the same time, since the upper water body of the hydraulic jump energy dissipation stilling pool is basically a mixture of water and vapor, the water flow can effectively filter out the gas after passing through the differential tail sill, which greatly reduces the energy consumption of the tunnel. air intake; the water stabilizing and wave dissipation grilles arranged in the stilling basin can effectively reduce the water surface fluctuation in the stilling basin and increase the energy dissipation efficiency; the water stabilizing and wave dissipation grilles arranged in front of the entrance of the downstream tunnel can Effectively reduce water surface fluctuations, ensure a stable water surface, and play the role of eliminating nest beams, reducing the possibility of suction vortexes.
附图说明Description of drawings
图1是本实用新型平面布置图。Fig. 1 is the utility model plane arrangement diagram.
图2是本实用新型剖面图。Fig. 2 is a sectional view of the utility model.
图3是本实用新型水流流态示意图。Fig. 3 is a schematic diagram of the water flow state of the utility model.
具体实施方式Detailed ways
如图1、图2所示，为改进输水工程洞内消力池的消能效率，经过理论分析，并通过试验验证，提出了“消力池+差动式尾坎+稳水消波格栅”消能组合形式，很好的达到了消能的预期目的。本实施例结构布置在上游输水管道1和下游输水隧洞9之间，其中上游输水管道1出水口处布置工作闸室2，用于控制泄流量，工作闸室2下游侧依次布置下抛物线形泄槽3和消力池4，消力池4作为水流消能的主要承载体，其尾部设置差动式尾坎，本例中差动式尾坎由一组相互间隔的高坎6和低坎7组成，可以满足不同流量下过坎水流跌落均较小，所述消力池4内部和下游输水隧洞9进水口处设置稳水消波格栅8(其中位于消力池内部的稳水消波格栅为一层，位于下游输水隧洞进水口处的稳水消波格栅布置成若干层)，进一步平稳水流，同时降低吸气漩涡发生的可能性。As shown in Figure 1 and Figure 2, in order to improve the energy dissipation efficiency of the stilling basin in the tunnel of the water transfer project, after theoretical analysis and experimental verification, the "stilling basin + differential tail sill + stable water and wave dissipation "Grille" energy dissipation combined form, well achieved the expected purpose of energy dissipation. The structure of this embodiment is arranged between the upstream
本实例的水流泄洪流态示意见图3，简述如下：The flow state of the flood discharge in this example is shown in Figure 3, which is briefly described as follows:
1)经工作闸室2控制的水流A经泄槽3下泄至消力池4，该段为泄流段H。1) The water flow A controlled by the working sluice chamber 2 is discharged to the stilling pool 4 through the chute 3, and this section is the discharge section H.
2)沿泄槽3下泄的水流A，在消力池4中形成旋滚B，达到消能效果，在水流向下游行进至消力池4内的稳水消波格栅8时，稳水消波格栅8产生消能降低水面波动的作用，即在该位置形成水流流态C；在小流量情况下，利用高坎6在消力池4内形成足够水深，达到消能充分的效果，同时由于小流量下游水位较低，水流在过坎时利用低坎7过流，降低了过坎前后的水位差E；在大流量时由于下游水位较高，高坎6和低坎7处于淹没状态，消力池4消能达到要求，过坎后水位差E也较小。差动式尾坎处形成D水流，并在过坎过程中将大量气泡滤出。从泄槽3末端至差动式尾坎末端范围为消能区I。2) The water flow A discharged along the chute 3 forms a swirl B in the stilling basin 4 to achieve the energy dissipation effect. The wave-dissipating grid 8 can dissipate energy and reduce water surface fluctuations, that is, form a water flow state C at this position; in the case of small flow, use the high ridge 6 to form a sufficient water depth in the stilling pool 4 to achieve sufficient energy dissipation. , at the same time, due to the low water level in the downstream of the small flow rate, the water flow uses the low ridge 7 to flow through the ridge, which reduces the water level difference E before and after the ridge; In the submerged state, the energy dissipation of the stilling pool 4 meets the requirements, and the water level difference E after passing the ridge is also small. D water flow is formed at the differential tail sill, and a large number of air bubbles are filtered out during the process of crossing the sill. The range from the end of the chute 3 to the end of the differential tail sill is the energy dissipation area I.
3)水流D，在坎后水流E仍有一定的水面差，且水流有一定的行进流速，在稳水区J范围、下游输水隧洞9进水口处布置有稳水消波格栅8，水流波动在稳水消波格栅8的作用下，波动F得到了有效的降低，形成较为平稳的水面，通过下游输水隧洞9将水流下泄即水流G。此外稳水消波格栅8还有效的降低了下游输水隧洞9进口吸气漩涡的发生。3) The water flow D, the water flow E still has a certain water level difference behind the ridge, and the water flow has a certain traveling velocity. A water stabilization and wave dissipation grid 8 is arranged in the range of the water stabilization area J and at the water inlet of the downstream water delivery tunnel 9, Under the action of the water-stabilizing and wave-dissipating grid 8, the fluctuation F of the water flow is effectively reduced to form a relatively stable water surface, and the water flow is discharged through the downstream water delivery tunnel 9, that is, the water flow G. In addition, the water-stabilizing and wave-eliminating grille 8 also effectively reduces the occurrence of the suction vortex at the inlet of the downstream water delivery tunnel 9 .
由于输水量的变化，导致下游水位即稳水区J的水位变幅较大，而稳水消波格栅8为固定式，因此为了满足不同的泄流要求，稳水区J的稳水消波格栅8可根据实际情况布置多层，以达到稳水消波之要求。Due to the change of water delivery, the water level in the downstream water level, that is, the water level in the water stabilizing area J, varies greatly, and the water stabilizing and wave dissipation grid 8 is fixed. Therefore, in order to meet different discharge requirements, the water stabilizing area J The wave breaking grid 8 can be arranged in multiple layers according to the actual situation, so as to meet the requirements of stabilizing water and wave breaking.
消力池4规模尺寸、高坎6和低坎7的高程、消力池4中及稳水区稳水消波格栅8的布置及型式，是新型的输水洞洞内消能工设计成败的关键，一般需要经过相关的水力计算，并经模型试验研究加以确定。The scale and size of the stilling pool 4, the elevations of the high ridge 6 and the low ridge 7, the arrangement and type of the water stabilization and wave dissipation grid 8 in the stilling pool 4 and the water stabilizing area are new designs for energy dissipation in the water delivery tunnel. The key to success or failure generally needs to be determined through relevant hydraulic calculations and model test studies.
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| CN2010206119276U CN201873973U (en) | 2010-11-09 | 2010-11-09 | Energy dissipater structure in water transporting tunnel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541337A (en) * | 2013-10-28 | 2014-01-29 | 广东省水利水电科学研究院 | Bubble inhibition device for power plant open drainage channels |
| CN106013009A (en) * | 2016-06-28 | 2016-10-12 | 四川大学 | Multi-reverse-slope type stilling pool |
| CN108221846A (en) * | 2018-03-14 | 2018-06-29 | 天津市水利勘测设计院 | A kind of pressure free current is to pressure flow fluidised form conversion facility |
| CN110055936A (en) * | 2019-05-15 | 2019-07-26 | 江西省水利科学研究院 | A kind of aqueduct being mounted on reservoir culvert |
-
2010
- 2010-11-09 CN CN2010206119276U patent/CN201873973U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541337A (en) * | 2013-10-28 | 2014-01-29 | 广东省水利水电科学研究院 | Bubble inhibition device for power plant open drainage channels |
| CN103541337B (en) * | 2013-10-28 | 2015-07-29 | 广东省水利水电科学研究院 | A kind of for power plant's surface water channel press down bulb apparatus |
| CN106013009A (en) * | 2016-06-28 | 2016-10-12 | 四川大学 | Multi-reverse-slope type stilling pool |
| CN106013009B (en) * | 2016-06-28 | 2018-01-09 | 四川大学 | A kind of more counter-slope formula stiling basins |
| CN108221846A (en) * | 2018-03-14 | 2018-06-29 | 天津市水利勘测设计院 | A kind of pressure free current is to pressure flow fluidised form conversion facility |
| CN108221846B (en) * | 2018-03-14 | 2023-10-27 | 天津市水务规划勘测设计有限公司 | Pressureless flow-to-pressured flow state conversion facility |
| CN110055936A (en) * | 2019-05-15 | 2019-07-26 | 江西省水利科学研究院 | A kind of aqueduct being mounted on reservoir culvert |
| CN110055936B (en) * | 2019-05-15 | 2023-12-05 | 江西省水利科学研究院 | Water delivery pipeline mounted on reservoir culvert pipe |
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