CN112112135A - Porous confluence opposite-flushing energy dissipation structure for hydraulic buildings and implementation method - Google Patents
Porous confluence opposite-flushing energy dissipation structure for hydraulic buildings and implementation method Download PDFInfo
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- CN112112135A CN112112135A CN202011067946.1A CN202011067946A CN112112135A CN 112112135 A CN112112135 A CN 112112135A CN 202011067946 A CN202011067946 A CN 202011067946A CN 112112135 A CN112112135 A CN 112112135A
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- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 154
- 238000011010 flushing procedure Methods 0.000 title claims description 19
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 193
- 238000005192 partition Methods 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims description 27
- 230000003139 buffering effect Effects 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 11
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- 230000006378 damage Effects 0.000 description 13
- 230000008569 process Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
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- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
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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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- 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
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Abstract
The invention discloses a porous confluence hedging energy dissipation structure for a hydraulic structure and an implementation method thereof. The first shunting trapezoidal gate pier, the second shunting trapezoidal gate pier and the partition wall of the energy dissipation structure separate a water inlet part into two large water inlet ends, each water inlet end consists of a group of main holes and side holes, so that the whole water inlet part is in a porous water inlet state, and the vertical impact of longitudinal water flow discharged from the main holes weakens the opposite impact effect of the water flow discharged from the side holes close to the two side walls to a certain extent.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a porous confluence hedging energy dissipation structure for a hydraulic building.
Background
In the construction of water conservancy and hydropower engineering, a gravity dam and a gate dam are overflow dam types which are commonly used, and because of the requirement of flood discharge and energy dissipation, a stilling basin with a certain scale is often built behind the overflow dam, and the energy dissipation is realized in a mode of strong rotation and rolling caused by water jump caused by transition from rapid flow to slow flow and a large amount of aeration. With the improvement of modern damming technology, the overall construction scale of the dam is developed towards the trend of high water head and large flow, and the size of the downstream stilling pool is also sharply increased. Engineering practice also proves that the destruction rate and the destruction degree of the stilling pool are in a straight-line rising trend along with the increase of the height of the dam.
The existing engineering practice proves that when the flow rate of water flow is large, the side wall of the auxiliary facility is very easy to generate local negative pressure, so that cavitation erosion damage occurs, the auxiliary energy dissipation facility is often damaged by violent impact, and the requirements of flood discharge and energy dissipation are hardly met in the aspects of steady flow and energy dissipation rate.
Aiming at the problems, the invention provides a porous confluence hedging energy dissipation structure for a hydraulic structure, which has the advantages of higher flow stabilization performance and energy dissipation rate, difficulty in causing local damage to an auxiliary energy dissipation facility when the flow rate of water flow is larger, and the like.
Disclosure of Invention
The invention aims to provide a porous confluence hedging energy dissipation structure for a hydraulic structure, which has the advantages of higher flow stabilization performance and energy dissipation rate, difficult local damage to an auxiliary energy dissipation facility when the flow rate of water flow is higher and the like, and can solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a porous confluence hedging energy dissipation structure for a hydraulic structure comprises a water inlet part, a middle gate and a water outlet part, wherein the middle gate is arranged between the water inlet part and the water outlet part;
the middle gate comprises a first support column, a second support column, a bearing beam and an energy dissipation flashboard assembly, the lower end of the inner side of the first support column is connected with the bearing beam, one end of the bearing beam, far away from the first support column, is connected with the second support column, the first support column and the second support column are in line symmetry with the center line of the bearing beam, the bottom end of the bearing beam is connected with the energy dissipation flashboard assembly, and one ends of the first support column and the second support column, far away from the protective side wall, are connected with a water outlet part;
the water outlet part comprises arc-shaped side walls and a water outlet bearing bottom plate, and the arc-shaped side walls are arranged on two sides of the water outlet bearing bottom plate close to the middle gate.
Furthermore, a second shunting trapezoidal gate pier is further installed at the position, close to the upper end edge of the other side protection side wall, of the water inlet bearing bottom plate, and the second shunting trapezoidal gate pier and the first shunting trapezoidal gate pier are in axial symmetry relative to the center line of the partition wall.
Furthermore, the surface of the water inlet bearing bottom plate and the position close to the edge are provided with a plurality of groups of first-stage energy dissipation grooves, the structure sizes of each group of first-stage energy dissipation grooves are equal, the protection side wall is composed of a leveling section and a narrow section, the inner side of the leveling section is close to the first shunting trapezoid gate pier and the second shunting trapezoid gate pier respectively, and one end of the narrow section is connected with the first pillar and the second pillar respectively.
Furthermore, the upper end surface of the water inlet bearing bottom plate, which is close to the beam narrow section and the bearing beam, is provided with two groups of main second-stage energy dissipation grooves and auxiliary second-stage energy dissipation grooves, the main second-stage energy dissipation grooves are communicated with the auxiliary second-stage energy dissipation grooves through grooves, the upper end of the water inlet bearing bottom plate is positioned between the main second-stage energy dissipation grooves and the bearing beam and is also provided with a high tail ridge, and the high tail ridge is in a continuous step shape.
Furthermore, a slide way is arranged in the inner cavity of the bearing beam, a sliding column corresponding to the slide way is arranged at the top end of the energy dissipation flashboard assembly, the energy dissipation flashboard assembly is movably connected with the slide way through the sliding column, and the slide way and the sliding column are matched with each other.
Further, energy dissipation flashboard subassembly includes base, moving part and contact flashboard on traveller, the arc, and the articulated moving part in bottom of base on the arc, the moving part be provided with two sets ofly relatively and about the central line axis symmetry of base on the arc, and the up end central authorities of contact flashboard have set firmly the extrusion spheroid, the extrusion spheroid is located the activity extrusion chamber that forms between two sets of moving parts.
Further, one side that the movable extrusion chamber was kept away from to the moving part is provided with the briquetting, and the briquetting is close to one side of base on the arc and passes through buffering reset spring and connect the base on the arc, is provided with the locking buckle in the inner chamber of base on the arc, and processing has the locking draw-in groove corresponding with the locking buckle in the upper end inner chamber of briquetting, and the base matches each other through locking buckle joint locking draw-in groove and locking buckle on the arc.
Furthermore, the arc-shaped side walls are axisymmetric with respect to the center line of the water outlet bearing bottom plate, an energy dissipation tail ridge is installed at the upper end, close to the bearing beam, of the water outlet bearing bottom plate, two ends of the energy dissipation tail ridge are respectively connected with the arc-shaped side walls, flow distribution plates are installed on two sides of the tail of the water outlet bearing bottom plate, buffering energy dissipation grains are further symmetrically arranged on the center line of the water outlet bearing bottom plate and on the surface of the water outlet bearing bottom plate, and the buffering energy dissipation grains are continuous teeth.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a porous conflux hedging energy dissipation structure for hydraulic buildings, wherein a first shunting trapezoidal gate pier is arranged at the position of an inlet bearing bottom plate close to the upper end edge of a protective side wall on one side, a second shunting trapezoidal gate pier is also arranged at the position of the inlet bearing bottom plate close to the upper end edge of the protective side wall on the other side, and a partition wall is fixedly arranged at the middle end of the surface of the inlet bearing bottom plate, so that the first shunting trapezoidal gate pier, the second shunting trapezoidal gate pier and the partition wall separate a water inlet part into two large water inlet ends, each water inlet end consists of a group of main holes and side holes, therefore, the whole water inlet part is in a porous water inlet shape, and the opposite impact effect of water flow discharged from the side holes close to the two side walls is weakened to a certain extent due to the vertical impact of longitudinal water flow discharged from the main holes, the staggered collision energy dissipation mode is the main energy dissipation mode, in order to ensure the safety of the structure, the main holes close to the two bank sides and, the energy dissipation device has the advantages that impact of transverse water flow of a certain side orifice on a protective side wall is prevented, orthogonal collision is realized between longitudinal water flow discharged from a first main orifice and a transverse 'water wall' formed by vertical steering and discharged from a side orifice close to the side orifice of the side wall at a narrow section, turbulent motion of a water body in a water inlet part is greatly enhanced, energy dissipation efficiency is greatly improved, orthogonal impact collision is realized by two water flows almost with equal speed, and meanwhile, secondary confluence and collision energy dissipation are carried out after the first confluence collision is finished and the water flows pass through a partition wall again, so that compared with a traditional primary energy dissipation mode, the energy dissipation effect is more prominent, and when the flow of the water flow is larger, local negative pressure is not easily generated on the side wall of an auxiliary facility, and cavitation damage is caused;
2. the invention provides a porous confluence hedging energy dissipation structure for a hydraulic structure, wherein an energy dissipation flashboard assembly is connected to the bottom end of a bearing beam, and one side of a pressing block, which is close to an arc-shaped upper base, is connected with the arc-shaped upper base through a buffering return spring, so that when water flow is overlarge, the water flow can continuously impact a contact flashboard, the contact flashboard can move upwards by extruding a ball body and simultaneously rotate a moving part by a certain angle, and the pressing block compresses the buffering return spring, the water flow inevitably consumes part of kinetic energy in the process of passing through the contact flashboard and jacking the contact flashboard upwards, the energy dissipation effect is improved, and when the water flow impact is gradually reduced, the buffering return spring is compressed to a certain degree and then can return and reset;
3. the invention provides a porous confluence opposite-flushing energy dissipation structure for hydraulic buildings, wherein a plurality of groups of first-stage energy dissipation grooves are arranged on the surface of a water inlet bearing bottom plate and close to the edge, two groups of main second-stage energy dissipation grooves and auxiliary second-stage energy dissipation grooves are arranged on the upper end surface of the water inlet bearing bottom plate close to a beam narrowing section and a bearing beam, and a high tail sill is also arranged between the main second-stage energy dissipation grooves and the bearing beam at the upper end of the water inlet bearing bottom plate, so that water flows into the water inlet bearing bottom plate firstly to carry out primary energy dissipation, and part of the water flows are buffered when flowing through the high tail sill, thereby avoiding cavitation damage of a water inlet part in the flood discharge process, ensuring safe operation of flood discharge, and simultaneously carrying out secondary energy dissipation on the inflowing water flows by utilizing the main second-stage energy dissipation grooves and the auxiliary second-stage energy dissipation grooves, so that the radius of wavy water flows is gradually reduced in a, the smooth water flow is ensured, and the purpose of energy dissipation is also achieved;
4. the invention provides a porous confluence hedging energy dissipation structure for a hydraulic structure, wherein an energy dissipation tail sill is arranged at the upper end of a water outlet bearing bottom plate close to a bearing beam, two sides of the tail part of the water outlet bearing bottom plate are respectively provided with a flow distribution plate, the flow distribution plates are axisymmetric about the center line of the water outlet bearing bottom plate, and the surface of the water outlet bearing bottom plate is also provided with buffering energy dissipation lines, so that water flow flowing into the water outlet bearing bottom plate is subjected to three-time energy dissipation through the energy dissipation tail sill, the flow distribution plates on the two sides of the tail part of the water outlet bearing bottom plate are utilized for distribution, part of the water flow flows through the flow distribution plates and is directly discharged into a reservoir, the other part of the water flow flows through the buffering energy dissipation lines and is subjected to energy dissipation treatment again, so that compared with the traditional energy dissipation structure, the flow.
Drawings
FIG. 1 is a schematic side view of a porous confluent opposite-flushing energy dissipation structure for a hydraulic structure according to the present invention;
FIG. 2 is a schematic view of the water outlet structure of the porous confluent opposite-flushing energy dissipation structure for hydraulic buildings according to the present invention;
FIG. 3 is a schematic view of the front side of the porous confluent opposite-flushing energy dissipation structure for hydraulic structures of the present invention;
FIG. 4 is an enlarged schematic view of the porous confluent opposite-flushing energy-dissipating structure for the hydraulic structure at the position A in FIG. 3;
FIG. 5 is a schematic view of the internal structure of the porous confluent opposite-flushing energy-dissipating structure for hydraulic structures according to the present invention;
FIG. 6 is a schematic structural view of an energy dissipation gate plate assembly of the porous confluent opposite-flushing energy dissipation structure for a hydraulic structure of the present invention;
FIG. 7 is a schematic view of a partial cross-sectional structure of an energy dissipation gate plate assembly of the porous confluent opposite-flushing energy dissipation structure for a hydraulic structure of the present invention;
FIG. 8 is a schematic view showing the flow pattern of water in the lower water inlet part when all flood discharge orifices of the porous confluent opposite-flushing energy dissipation structure for hydraulic structures of the present invention are opened;
fig. 9 is a schematic view of the flow pattern of the water flow in the lower water inlet part of the porous confluent opposite flushing energy dissipation structure for hydraulic buildings, which is only opened by the lateral flood discharge orifices.
In the figure: 1. a water inlet part; 11. a water intake bearing bottom plate; 111. a first shunting trapezoidal gate pier; 112. a second shunt trapezoidal gate pier; 113. a first-stage energy dissipation groove; 114. a main secondary energy dissipation groove; 1141. a channel; 115. an auxiliary secondary energy dissipation groove; 116. a high tail ridge; 12. a protective side wall; 121. a leveling section; 122. a narrowed section; 13. a partition wall; 2. an intermediate gate; 21. a first support; 22. a second support; 23. a bolster; 231. a slideway; 24. an energy dissipation gate plate assembly; 241. a traveler; 242. an arc-shaped upper base; 2421. locking the buckle; 243. a movable member; 2431. a movable extrusion cavity; 2432. briquetting; 24321. a buffer return spring; 24322. locking the clamping groove; 244. a contact gate; 2441. extruding the ball body; 3. a water outlet part; 31. the arc-shaped side wall; 32. a water outlet bearing bottom plate; 321. energy dissipation tail ridges; 322. a flow distribution plate; 323. buffering energy dissipation lines.
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.
Referring to fig. 1, 3, 4 and 8-9, a porous conflux hedging energy dissipation structure for hydraulic buildings comprises a water inlet part 1, a middle gate 2 and a water outlet part 3, wherein the middle gate 2 is installed between the water inlet part 1 and the water outlet part 3, the water inlet part 1 comprises a water inlet bearing bottom plate 11, protective side walls 12 and partition walls 13, the protective side walls 12 are respectively arranged on two sides of the water inlet bearing bottom plate 11, the middle end of the surface of the water inlet bearing bottom plate 11 is fixedly provided with the partition wall 13, the upper end edge of the water inlet bearing bottom plate 11 close to the protective side wall 12 on one side is provided with a first shunting trapezoid gate pier 111, the first shunting trapezoid gate pier 111 is positioned in the center of the partition wall 13 and the protective side wall 12, and the end of the protective side wall 12 far away from the first shunting trapezoid gate pier 111 is provided with the middle gate 2; the upper end edge of the water inlet bearing bottom plate 11 close to the other side protective side wall 12 is also provided with a second shunting trapezoidal gate pier 112, the second shunting trapezoidal gate pier 112 and the first shunting trapezoidal gate pier 111 are axisymmetric about the center line of the partition wall 13, so that the first shunting trapezoidal gate pier 111, the second shunting trapezoidal gate pier 112 and the partition wall 13 divide the water inlet part 1 into two large water inlet ends, each water inlet end is composed of a group of main holes and side holes, the whole water inlet part 1 is divided into a multi-hole water inlet shape, and the opposite impact effect of water flows discharged from the side holes close to the two side walls is weakened to a certain extent due to the vertical impact of longitudinal water flows discharged from the main holes, the staggered collision energy dissipation is a main energy dissipation mode at the moment, in order to ensure the structural safety, the main holes close to the two bank sides and the side holes need to be synchronously opened at any time when engineering runs, so as to prevent the transverse water flow of a certain side hole from impacting the side wall 12, the vertical water flow discharged from the first main orifice and the transverse 'water wall' formed by vertical steering and discharged from the side hole close to the side wall realize orthogonal collision at the beam narrow section 122, thereby greatly enhancing the turbulence of the water body in the water inlet part 1, greatly improving the energy dissipation efficiency, generating orthogonal impact collision by two water flows with almost equal speed, simultaneously carrying out secondary confluence and collision energy dissipation after the primary confluence collision is finished and passing through the partition wall 13 again, and compared with the traditional primary energy dissipation mode, the energy dissipation effect is more prominent, and when the flow of the water flow is larger, the side wall of the auxiliary facility is not easy to generate local negative pressure, thereby generating cavitation damage; a plurality of groups of first-stage energy dissipation grooves 113 are formed in the surface of the water inlet bearing bottom plate 11 and close to the edge, the structural sizes of each group of first-stage energy dissipation grooves 113 are equal, the protective side wall 12 is composed of a leveling section 121 and a narrowing section 122, the inner sides of the leveling section 121 are respectively close to the first shunting trapezoidal gate pier 111 and the second shunting trapezoidal gate pier 112, and one end of the narrowing section 122 is respectively connected with the first support column 21 and the second support column 22; two groups of main and auxiliary secondary energy dissipation grooves 114 and 115 are formed on the upper end surface of the water inlet bearing bottom plate 11 close to the beam narrow section 122 and the bolster 23, the main and auxiliary secondary energy dissipation grooves 114 and 115 are communicated with each other through a channel 1141, a high tail sill 116 is further arranged between the main and auxiliary secondary energy dissipation grooves 114 and the bolster 23 at the upper end of the water inlet bearing bottom plate 11, and the high tail sill 116 is in a continuous step shape, so that water flows into the water inlet bearing bottom plate 11 and then flows into the first-stage energy dissipation groove 113 for primary energy dissipation, and a part of water flows are buffered when flowing through the high tail sill 116, thereby avoiding cavitation damage of the water inlet part 1 in the flood discharge process, ensuring safe operation of flood discharge, and simultaneously utilizing the main and auxiliary secondary energy dissipation grooves 114 and 115 to perform secondary energy dissipation on the inflowing water flow, so that the radius of the water flow is gradually reduced in a smooth manner and finally connected with the front high tail sill 116, ensuring smooth water flow and achieving the purpose of energy dissipation.
Referring to fig. 2, the porous conflux hedging energy dissipation structure for hydraulic structures includes a water outlet portion 3 including arc-shaped side walls 31 and a water outlet bearing bottom plate 32, wherein the arc-shaped side walls 31 are respectively arranged on two sides of the water outlet bearing bottom plate 32 close to a middle gate 2; the arc-shaped side walls 31 are axisymmetrical with respect to the center line of the water outlet bearing bottom plate 32, the upper end of the water outlet bearing bottom plate 32 close to the bolster 23 is provided with an energy dissipation tail bank 321, two ends of the energy dissipation tail bank 321 are respectively connected with the arc-shaped side walls 31, two sides of the tail part of the water outlet bearing bottom plate 32 are both provided with splitter plates 322, the splitter plates 322 are axisymmetrical with respect to the center line of the water outlet bearing bottom plate 32, the surface of the water outlet bearing bottom plate 32 is also provided with buffering energy dissipation lines 323, the buffering energy dissipation lines 323 are continuous teeth-shaped, so that the water flow flowing into the water outlet bearing bottom plate 32 is subjected to three-time energy dissipation through the energy dissipation tail bank 321, meanwhile, the splitter plates 322 on two sides of the tail part of the water outlet bearing bottom plate 32 are utilized for splitting, part of the water flow directly enters the reservoir through the, the shunting function is added, the local damage to the auxiliary energy dissipation facility is avoided, and the water flow derivation efficiency is also improved.
Referring to fig. 5-7, a porous conflux hedging energy dissipation structure for hydraulic structures, the middle gate 2 includes a first pillar 21, a second pillar 22, a bolster 23 and an energy dissipation gate plate assembly 24, the lower end of the inner side of the first pillar 21 is connected with the bolster 23, one end of the bolster 23 far away from the first pillar 21 is connected with the second pillar 22, the first pillar 21 and the second pillar 22 are axisymmetric with respect to the center line of the bolster 23, the bottom end of the bolster 23 is connected with the energy dissipation gate plate assembly 24, and one ends of the first pillar 21 and the second pillar 22 far away from the protective side wall 12 are connected with a water outlet portion 3; a slideway 231 is arranged in the inner cavity of the bearing beam 23, a sliding column 241 corresponding to the slideway 231 is arranged at the top end of the energy dissipation flashboard assembly 24, the energy dissipation flashboard assembly 24 is movably connected with the slideway 231 through the sliding column 241, and the slideway 231 is matched with the sliding column 241; the energy dissipation gate plate assembly 24 comprises a sliding column 241, an arc-shaped upper base 242, movable pieces 243 and a contact gate plate 244, wherein the bottom end of the arc-shaped upper base 242 is hinged to the movable pieces 243, the movable pieces 243 are oppositely provided with two groups and are axisymmetric with respect to the center line of the arc-shaped upper base 242, the center of the upper end surface of the contact gate plate 244 is fixedly provided with an extrusion ball 2441, and the extrusion ball 2441 is positioned in a movable extrusion cavity 2431 formed between the two groups of the movable pieces 243; a pressing block 2432 is arranged on one side of the movable member 243 far away from the movable extrusion cavity 2431, one side of the pressing block 2432 close to the arc-shaped upper base 242 is connected with the arc-shaped upper base 242 through a buffer return spring 24321, a locking buckle 2421 is arranged in the inner cavity of the arc-shaped upper base 242, a locking clamping groove 24322 corresponding to the locking buckle 2421 is machined in the inner cavity of the upper end of the pressing block 2432, the arc-shaped upper base 242 is clamped with the locking clamping groove 24322 through the locking buckle 2421, the locking clamping groove 24322 is matched with the locking buckle 2421, when water flow is too large, water flow can continuously impact the contact gate plate 244, the contact gate plate 244 can move upwards through the extrusion ball 2441 and simultaneously rotate the movable member 243 by a certain angle, the pressing block 2432 compresses the buffer return spring 24321, part of kinetic energy is inevitably consumed in the process that the water flow passes through the contact gate plate 244 and jacks up the contact gate plate 244 upwards, the buffer return spring 24321 can return and return after compressing to a certain degree.
In summary, the following steps: the invention provides a porous conflux hedging energy dissipation structure for hydraulic buildings, wherein two sides of a water inlet bearing bottom plate 11 are provided with protective side walls 12, the middle end of the surface of the water inlet bearing bottom plate 11 is fixedly provided with a partition wall 13, the upper end edge of the water inlet bearing bottom plate 11 close to the protective side wall 12 on one side is provided with a first diversion trapezoid gate pier 111, the first diversion trapezoid gate pier 111 is positioned in the center of the partition wall 13 and the protective side wall 12, the upper end edge of the water inlet bearing bottom plate 11 close to the protective side wall 12 on the other side is also provided with a second diversion trapezoid gate pier 112, the middle end of the surface of the water inlet bearing bottom plate 11 is fixedly provided with the partition wall 13, so that the water inlet part 1 is separated into two large water inlet ends by the first diversion trapezoid gate pier 111, the second diversion trapezoid gate pier 112 and the partition wall 13, each water inlet end consists of a group of main holes and side holes, therefore, the whole water inlet part 1 is divided into a porous water inlet shape, and longitudinal vertical, the opposite impact action of the water flows discharged from the side holes close to the two side walls is weakened to a certain extent, the staggered collision energy dissipation is a main energy dissipation mode, in order to ensure the structural safety, the main holes and the side holes close to the two bank sides need to be synchronously opened and closed at any time during engineering operation so as to prevent the transverse water flow of a certain side hole from impacting the protective side wall 12 when the hole is independently opened, the orthogonal collision is realized between the longitudinal water flow discharged from the first main hole and the transverse water wall formed by vertically turning the water flow discharged from the side hole close to the side wall in a narrow section 122, the turbulent motion of the water body in the water inlet part 1 is greatly enhanced, the energy dissipation efficiency is also greatly improved, the orthogonal impact collision is realized by two water flows with almost equal speeds, and the secondary confluence and collision energy dissipation are carried out after the first confluence collision is finished and passes through the partition wall 13 again, compared with the traditional primary energy dissipation mode, the energy dissipation effect is more outstanding, when the water flow is larger, the side wall of the auxiliary facility is not easy to generate local negative pressure, so that cavitation damage is generated, a plurality of groups of first-stage energy dissipation grooves 113 are arranged on the surface of the water inlet bearing bottom plate 11 and near the edge, two groups of main second-stage energy dissipation grooves 114 and auxiliary second-stage energy dissipation grooves 115 are arranged on the upper end surface of the water inlet bearing bottom plate 11 near the beam narrow section 122 and the bearing beam 23, and a high tail sill 116 is also arranged between the main second-stage energy dissipation grooves 114 and the bearing beam 23 at the upper end of the water inlet bearing bottom plate 11, so that the water flow firstly flows into the first-stage energy dissipation grooves 113 for primary energy dissipation after entering the water inlet bearing bottom plate 11, part of the water flow is buffered when flowing through the high tail sill 116, cavitation damage of the water inlet part 1 in the flood discharge process is avoided, the safe operation of flood discharge is ensured, and the flowing water flow is secondarily dissipated by the, the radius of the wavy water flow is gradually reduced in a smooth manner and is finally connected with a front high tail sill 116, the smooth water flow is ensured, and the purpose of energy dissipation is also achieved, in addition, an intermediate gate passage 2 is installed at one end, far away from a first shunting trapezoidal gate pier 111, of the protective side wall 12, a support beam 23 is connected to the lower end of the inner side of a first support column 21, one end, far away from the first support column 21, of the support beam 23 is connected with a second support column 22, the first support column 21 and the second support column 22 are in axial symmetry with respect to the central line of the support beam 23, an energy dissipation gate plate assembly 24 is connected to the bottom end of the support beam 23, one side, close to an arc upper base 242, of a pressing block 2432 is connected with the arc upper base 242 through a buffering return spring 24321, so that when the water flow is too large, the water flow can continuously impact the contact gate plate 244, the contact gate plate 244 can move upwards through a pressing, when water flow passes through the contact gate plate 244 and jacks up the contact gate plate 244, partial kinetic energy is consumed, the energy dissipation effect is improved, when water flow impact is gradually reduced, the buffer return spring 24321 is compressed to a certain degree and then can return and return, the bottom end of the support beam 23 is connected with the energy dissipation gate plate assembly 24, one ends of the first support column 21 and the second support column 22, which are far away from the protective side wall 12, are connected with the water outlet part 3, the two sides of the water outlet bearing bottom plate 32, which are close to the middle gate way 2, are provided with the arc-shaped side walls 31, the upper end of the water outlet bearing bottom plate 32, which is close to the support beam 23, is provided with the energy dissipation tail sill 321, the two sides of the tail part of the water outlet bearing bottom plate 32 are provided with the splitter plates 322, which are axisymmetrical with respect to the center line of the water outlet bearing bottom plate 32, and the surface of the water outlet bearing bottom plate 32 is also provided with, meanwhile, the flow distribution plates 322 on two sides of the tail of the water outlet bearing bottom plate 32 are used for distributing water, part of water flows through the flow distribution plates 322 and is directly discharged into the reservoir, and the other part of water flows through the buffering energy dissipation lines 323 and is subjected to energy dissipation treatment again, so that compared with the traditional energy dissipation structure, the flow distribution structure has the advantages that the flow distribution function is increased, the local damage to auxiliary energy dissipation facilities is avoided, and the water flow guiding efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (8)
1. The utility model provides a porous offset energy dissipation structure that converges for hydraulic structure, includes into water portion (1), middle floodgate way (2) and play water portion (3), installs middle floodgate way (2), its characterized in that between portion (1) and play water portion (3) of intaking: the water inlet part (1) comprises a water inlet bearing bottom plate (11), protective side walls (12) and partition walls (13), the protective side walls (12) are arranged on two sides of the water inlet bearing bottom plate (11), the partition walls (13) are fixedly arranged at the middle end of the surface of the water inlet bearing bottom plate (11), a first shunting trapezoidal gate pier (111) is installed at the position, close to the upper end edge of one side protective side wall (12), of the water inlet bearing bottom plate (11), the first shunting trapezoidal gate pier (111) is located in the center of the partition walls (13) and the protective side walls (12), and a middle gate way (2) is installed at one end, far away from the first shunting trapezoidal gate pier (111), of the protective side wall (12);
the middle gate way (2) comprises a first support column (21), a second support column (22), a bearing beam (23) and an energy dissipation flashboard assembly (24), the lower end of the inner side of the first support column (21) is connected with the bearing beam (23), one end, far away from the first support column (21), of the bearing beam (23) is connected with the second support column (22), the first support column (21) and the second support column (22) are in line symmetry with respect to the center line of the bearing beam (23), the bottom end of the bearing beam (23) is connected with the energy dissipation flashboard assembly (24), and one ends, far away from the protective side wall (12), of the first support column (21) and the second support column (22) are connected with a water outlet part (3;
the water outlet part (3) comprises arc-shaped side walls (31) and a water outlet bearing bottom plate (32), and the arc-shaped side walls (31) are arranged on two sides of the water outlet bearing bottom plate (32) close to the middle gate (2).
2. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 1, characterized in that: the upper end edge of the water inlet bearing bottom plate (11) close to the other side protective side wall (12) is further provided with a second split trapezoid gate pier (112), and the second split trapezoid gate pier (112) and the first split trapezoid gate pier (111) are in axial symmetry with respect to the center line of the partition wall (13).
3. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 1, characterized in that: the surface of the water inlet bearing bottom plate (11) is provided with a plurality of groups of first-level energy dissipation grooves (113) close to the edge, the structure size of each group of first-level energy dissipation grooves (113) is equal, the protection side wall (12) is composed of a leveling section (121) and a narrowing section (122), the inner side of the leveling section (121) is close to a first shunting trapezoid gate pier (111) and a second shunting trapezoid gate pier (112) respectively, and one end of the narrowing section (122) is connected with a first support column (21) and a second support column (22) respectively.
4. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 1, characterized in that: two groups of main secondary energy dissipation grooves (114) and auxiliary secondary energy dissipation grooves (115) are formed in the upper end surface, close to the beam narrow section (122) and the bearing beam (23), of the water inlet bearing bottom plate (11), the main secondary energy dissipation grooves (114) are communicated with the auxiliary secondary energy dissipation grooves (115) through the grooves (1141), a high tail sill (116) is further arranged between the main secondary energy dissipation grooves (114) and the bearing beam (23) at the upper end of the water inlet bearing bottom plate (11), and the high tail sill (116) is in a continuous step shape.
5. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 1, characterized in that: a slide way (231) is arranged in an inner cavity of the bearing beam (23), a slide column (241) corresponding to the slide way (231) is arranged at the top end of the energy dissipation flashboard assembly (24), the energy dissipation flashboard assembly (24) is movably connected with the slide way (231) through the slide column (241), and the slide way (231) is matched with the slide column (241).
6. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 1, characterized in that: the energy dissipation flashboard assembly (24) comprises a sliding column (241), an arc-shaped upper base (242), moving pieces (243) and a contact flashboard (244), wherein the bottom end of the arc-shaped upper base (242) is hinged to the moving pieces (243), the moving pieces (243) are oppositely provided with two groups and are axisymmetric about the center line of the arc-shaped upper base (242), an extrusion ball body (2441) is fixedly arranged in the center of the upper end face of the contact flashboard (244), and the extrusion ball body (2441) is located in a movable extrusion cavity (2431) formed between the two groups of moving pieces (243).
7. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 6, characterized in that: one side of the movable piece (243) far away from the movable extrusion cavity (2431) is provided with a pressing block (2432), one side of the pressing block (2432) close to the arc-shaped upper base (242) is connected with the arc-shaped upper base (242) through a buffer return spring (24321), a locking buckle (2421) is arranged in an inner cavity of the arc-shaped upper base (242), a locking clamping groove (24322) corresponding to the locking buckle (2421) is machined in an inner cavity of the upper end of the pressing block (2432), the arc-shaped upper base (242) is clamped with the locking clamping groove (24322) through the locking buckle (2421), and the locking clamping groove (24322) is matched with the locking buckle (2421).
8. The porous confluent opposite-flushing energy dissipation structure for hydraulic structures as claimed in claim 1, characterized in that: arc side wall (31) are line symmetry about the central line of play water load-bearing bottom plate (32), and go out water load-bearing bottom plate (32) and install energy dissipation tail bank (321) near the upper end of bolster (23), arc side wall (31) are connected respectively to the both ends of energy dissipation tail bank (321), and the afterbody both sides of going out water load-bearing bottom plate (32) all install flow distribution plate (322), flow distribution plate (322) still are provided with buffering energy dissipation line (323) about the central line of play water load-bearing bottom plate (32) symmetry and the surface of going out water load-bearing bottom plate (32), buffering energy dissipation line (323) are continuous cusp.
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| CN112112135B (en) | 2022-01-18 |
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