阅读说明：本技术 一种新型弧形圆柱边墙溢洪道消能系统 (Novel arc cylinder side wall spillway energy dissipation system ) 是由 何新林 曾钰峰 于 2021-05-08 设计创作，主要内容包括：本发明公开了一种优化水流条件,对下游河道、岸坡冲刷小,造价低廉,结构简单紧凑,泄洪能力强,洪水没有雾化,减短了下游消力池长度,使用寿命长,抗冲击、耐用性高的,集挑流、阶梯、弧形圆柱边墙、面流、底流消能有机地结合在一起地新型弧形圆柱边墙溢洪道消能系统。它由过渡段、阶梯及弧形圆柱边墙、挑坎、锯齿、消能坎组成；水流经过过渡段到达阶梯和弧形圆柱边墙段,在阶梯末端接挑坎,将水流挑至下游锯齿段,锯齿段后接消能坎,水流最后通过消能坎进入河道。(The invention discloses a novel energy dissipation system of an arc-shaped cylindrical side wall spillway, which optimizes water flow conditions, has small scouring on a downstream river channel and a bank slope, has low manufacturing cost, simple and compact structure, strong flood discharge capacity, no atomization of flood, short length of a downstream stilling basin, long service life, high impact resistance and durability, and organically combines the functions of trajectory lifting, stairs, an arc-shaped cylindrical side wall, surface flow and bottom flow energy dissipation. The energy dissipation device consists of a transition section, steps, arc-shaped cylindrical side walls, flip buckets, sawteeth and energy dissipation buckets; water flow reaches the step and the arc-shaped cylindrical side wall section through the transition section, the flip bucket is connected to the tail end of the step, the water flow is flipped to the downstream sawtooth section, the sawtooth section is connected with the energy dissipation bucket, and the water flow finally enters the river channel through the energy dissipation bucket.)

1. A novel energy dissipation system for an arc-shaped cylindrical spillway side wall is characterized by comprising a transition section, a step section, an arc-shaped cylinder, side walls, flip buckets, sawtooth sections and energy dissipation buckets, wherein the transition section is arranged between one ends of the two parallel side walls, and two ends of the transition section are respectively connected with the two side walls; the step section is arranged between two side walls, the front end of the step section is connected with the rear side of the transition section, a plurality of arc-edge cylinders which are arranged at equal intervals are arranged on the inner sides of the side walls, and the arc-edge cylinders are positioned between the side walls and the step section; the tail end of the step section is connected with a flip bucket, and two ends of the flip bucket are respectively connected with the other ends of the two side walls; the front end of the sawtooth section is connected with the rear side surface of the flip bucket; the rear section of the sawtooth section is connected with an energy dissipation ridge; the height of the step section is gradually reduced from the transition section towards the direction of the energy dissipation ridge; the flip bucket is higher than the rear end of the step section.

2. The system of claim 1, wherein the side wall is of a trapezoidal configuration.

3. The system of claim 2, wherein the outer surface of the transition section is a curved surface of a three-arc curve.

4. A novel arc-shaped cylindrical sidewall spillway energy dissipation system as defined in claim 3, wherein said stepped section is formed of a plurality of raised steps.

5. The novel energy dissipation system for spillways with arc-shaped cylindrical side walls as claimed in claim 4, wherein the arc-shaped cylinder is of a semicircular structure.

6. The system of claim 5, wherein the flip bucket is in the form of a sloped sill.

7. The novel arc-shaped cylindrical sidewall spillway energy dissipation system of claim 6, wherein the sawtooth section is provided with V-shaped sawteeth protruding upwards.

8. The novel arc-shaped cylindrical sidewall spillway energy dissipation system as claimed in any one of claims 1-7, wherein the energy dissipation bank is a forward or reverse energy dissipation bank.

Technical Field

The invention relates to the technical field of spillways, in particular to a novel energy dissipation system for a spillway with an arc-shaped cylindrical side wall.

Background

The reservoir is used as a water conservancy project building for storing flood and regulating water flow, and can be used for irrigation, power generation, flood control and fish culture. Can play the roles of flood control, water storage irrigation, water supply, power generation, fish culture and the like. Plays an important role in the development of national economy. The spillway serving as a flood discharge building of the reservoir acts on floods which cannot be accommodated in the planned reservoir capacity to ensure the safety of the dam body. Spillways are generally not frequently operated, but are important buildings in reservoir hubs.

Because the slope of the spillway steep groove is steeper, the water flow in the groove is mainly characterized by large flow speed, strong turbulence and unstable water surface, the mass point of the water flow is mainly inertia, and the viscous resistance effect is not obvious. The water flow at this time is particularly sensitive to boundary conditions, and if the control is not good, phenomena such as aeration, shock waves, cavitation erosion and the like can occur, so that the safety of the building and the downstream is threatened. Therefore, when the overflow section shape of the spillway and the water flow elements change sharply along the way, the requirements on the flow state control of the water flow are also put forward besides meeting the flood discharge flow. The main purpose of flood discharge and energy dissipation is to safely render large volumes of flood water downstream through dam body orifices, spillways or flood tunnels. If the flood discharge and energy dissipation problems are not well treated, not only can serious scouring be generated on the downstream riverbed, but also bad flow state can be caused, the normal operation of other buildings in the hub is influenced, and even the safety of the dam can be endangered.

With the development of hydraulic engineering causes, the energy dissipation mode has been developed from a single energy dissipation mode to a plurality of energy dissipation modes. At present, the scouring and the damage to a downstream river channel cannot be greatly reduced by any flood discharge mode. In order to reduce the scouring of downstream riverways and bank slopes and shorten the length of downstream stilling ponds, the arc-shaped cylindrical side wall spillway energy dissipation system is provided.

At present, according to the relevant data retrieval of Chinese patent, no relevant report about the energy dissipation of the spillway with the arc-shaped cylindrical side wall exists.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a novel arc-shaped cylindrical side wall spillway energy dissipation system which integrates step section energy dissipation, side wall curve energy dissipation, trajectory, underflow and surface flow energy dissipation and is organically combined. The device has the characteristics of optimized water flow conditions, small scouring on downstream riverways and bank slopes, low manufacturing cost, simple and compact structure, strong flood discharge capacity, no atomization of flood, short length of the downstream stilling basin, long service life, impact resistance and high durability.

In order to solve the technical problems, the invention adopts the following technical scheme:

a novel energy dissipation system for an arc-shaped cylindrical spillway side wall is characterized by comprising a transition section, a step section, an arc-shaped cylinder, side walls, flip buckets, sawtooth sections and energy dissipation buckets, wherein the transition section is arranged between one ends of the two parallel side walls, and two ends of the transition section are respectively connected with the two side walls; the step section is arranged between two side walls, the front end of the step section is connected with the rear side of the transition section, a plurality of arc-edge cylinders which are arranged at equal intervals are arranged on the inner sides of the side walls, and the arc-edge cylinders are positioned between the side walls and the step section; the tail end of the step section is connected with a flip bucket, and two ends of the flip bucket are respectively connected with the other ends of the two side walls; the front end of the sawtooth section is connected with the rear side surface of the flip bucket; the rear section of the sawtooth section is connected with an energy dissipation ridge; the height of the step section is gradually reduced from the transition section towards the direction of the energy dissipation ridge; the flip bucket is higher than the rear end of the step section.

Preferably, the side wall has a trapezoidal structure.

Preferably, the outer side surface of the transition section is a curved surface of a three-arc curve;

preferably, the step section consists of a plurality of raised steps;

preferably, the arc cylinder is of a semicircular structure;

preferably, the flip bucket is in the form of a slant bucket;

preferably, the sawtooth section adopts V-shaped sawtooth protruding upwards;

preferably, the energy dissipation sill is a forward or reverse energy dissipation sill.

The invention has the advantages that the structure is compact, the energy dissipation is basically carried out from the moment of flood discharge, and simultaneously, a plurality of energy dissipation modes such as trajectory, surface flow, bottom flow and the like are utilized, so the energy dissipation efficiency is higher;

when flood is released in the spillway, most energy is eliminated by the step section and the arc-shaped cylindrical curve side wall, so that the length of the downstream stilling pool is greatly reduced, the manufacturing cost is saved, and the structure is simple and convenient to construct;

when the water flow passes through the flip bucket and reaches the sawtooth section, most energy is consumed, the downstream is slightly scoured, and the protection of bank slopes and riverbeds is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a novel arc-shaped cylindrical wall spillway energy dissipation system provided by the invention;

FIG. 2 is a cross-sectional view of a novel arc-shaped cylindrical sidewall spillway energy dissipation system provided by the present invention;

FIG. 3 is a front view of a novel arc-shaped cylindrical sidewall spillway energy dissipation system provided by the present invention;

fig. 4 is a top view of a novel arc-shaped cylindrical sidewall spillway energy dissipation system provided by the invention.

Description of reference numerals:

the energy dissipation device comprises a transition section 1, a step section 2, an arc-shaped cylinder 3, a side wall 4, a flip bucket 5, a sawtooth section 6 and an energy dissipation bucket 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-4, a novel arc-shaped cylindrical spillway energy dissipation system with side walls comprises a transition section 1, a step section 2, an arc-shaped cylinder 3, side walls 4, flip buckets 5, a sawtooth section 6 and an energy dissipation bucket 7, wherein the transition section 1 is arranged between one ends of two parallel side walls 4, and two ends of the transition section 1 are respectively connected with the two side walls 4; the step section 2 is arranged between two side walls 4, the front end of the step section 2 is connected with the rear side of the transition section 1, a plurality of arc-side cylinders which are arranged at equal intervals are arranged on the inner side of each side wall 4, and the arc-side cylinders are positioned between the side walls 4 and the step section 2; the tail end of the step section 2 is connected with a flip bucket 5, and two ends of the flip bucket 5 are respectively connected with the other ends of the two side walls 4; the front end of the sawtooth section 6 is connected with the rear side surface of the flip bucket 5; the rear section of the sawtooth section 6 is connected with an energy dissipation ridge 7; the height of the step section 2 is gradually reduced from the transition section 1 to the direction of the energy dissipation ridge 7; the height of the flip bucket 5 is higher than that of the rear end of the step section 2.

Further, the side wall 4 has a trapezoidal structure.

Further, the outer side surface of the transition section 1 is a curved surface of a three-arc curve;

further, the step section 2 is composed of a plurality of raised steps;

further, the arc-shaped cylinder 3 is of a semicircular structure; the connection with the side wall 4 is better;

further, the flip bucket 5 is in the form of an inclined nose bucket; after water flows through the nose ridge, the water tongue is effectively guided, the air diffusivity is improved, the water tongue can smoothly return to a narrow river channel, and the single-width flow is reduced, so that the washing of the incident water tongue on a downstream riverbed is weakened;

further, the sawtooth section 6 adopts V-shaped sawtooth protruding upwards;

further, the energy dissipation bank 7 is a forward or reverse energy dissipation bank 7.

The front end of the spillway is a transition section 1, the transition section 1 is connected with a step section 2, energy consumption is achieved by falling water of the step section 2, arc-shaped cylinders 3 are built in side walls 4 on two sides of the step section 2, the arc-shaped cylinders 3 are compactly arranged, and energy dissipation is achieved by vortex and collision generated when water flows meet the arc-shaped cylinders 3; the most basic water flow form of the energy dissipation is circular flow, the solid side wall of the circular flow has larger centrifugal force and is contacted with the atmosphere, the whole water flow does not have negative pressure, the flow speed is rapidly reduced, the cavitation property is better, and cavitation erosion cannot be generated; the water head loss is increased, meanwhile, the water flow is smoother, the flow velocity of the water flow is reduced, the flip bucket 5 is connected to the tail of the step section 2, partial energy is eliminated through diffusion, turbulence and aeration of jet flow in the air by means of flip bucket energy dissipation, the sawtooth section 6 is connected to the back of the flip bucket 5, the water flow falls on the sawtooth section 6, the water flow is enabled to generate hydraulic jump in a limited range, energy is consumed through internal friction, aeration and impact of the water flow, the energy dissipation bucket 7 is connected to the last of the sawtooth section 6, the main flow is selected to the water surface by means of the energy dissipation bucket 7, and complementary energy is eliminated through main flow surface diffusion, bottom rotary rolling and surface rotary rolling.

The spillway can be cast by concrete; rivers reach ladder section 2 and 3 lateral walls of arc cylinder 4 sections through changeover portion 1, connect flip 5 at 2 end in ladder section, choose rivers to low reaches sawtooth section 6, connect energy dissipation bank 7 behind the sawtooth section 6, and rivers get into the river course through energy dissipation bank 7 at last.

The arc-shaped cylinder 3 does not have a specific size and shape and can be arranged according to actual conditions; and the distance of the arc-shaped cylinder 3 can be set arbitrarily according to the actual situation.

The size, the height and the width of the step section 2 are not limited and are set according to the actual situation.

The size and the shape of the sawtooth section 6 are not limited and are set according to actual conditions.

The design of the invention optimizes the water flow condition, has small scouring on downstream river channels and bank slopes, low manufacturing cost, simple and compact structure, strong flood discharge capacity, no atomization of flood, short length of the downstream stilling basin, long service life, high impact resistance and durability, and organically combines the trajectory, the ladder, the arc-shaped cylinder 3 side wall 4, the surface flow and the bottom flow energy dissipation together.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.