CN217974257U - Space energy dissipation and aerated spillway structure - Google Patents

Abstract

The utility model discloses a space energy dissipation holds concurrently and aerifys spillway structure, including spillway bottom plate, the side of spillway bottom plate is spillway boundary wall, and the interval is provided with the anti-arc energy dissipation bank of multichannel on the spillway bottom plate, and the top surface of anti-arc energy dissipation bank is anti-arc curved surface, low reaches face perpendicular to spillway bottom plate, and the vertical anti-arc bead that is provided with on the spillway boundary wall inside wall in anti-arc energy dissipation bank low reaches, anti-arc bead and the adjacent setting of anti-arc energy dissipation bank, anti-arc bead top surface be anti-arc curved surface, low reaches face perpendicular to spillway boundary wall. This structure uses anti-arc energy dissipation bank and anti-arc fillet combined action, constantly dissipates the energy to the rivers of sluicing, has changed conventional spillway rivers form of sluicing, and the rivers of sluicing are changed into three-dimensional space diffusion form by the two-dimensional form, make full use of spillway self structure, can constantly consume the rivers energy of sluicing, reduce the spillway rivers velocity of flow, still set up shaft and the blow vent of ventilating, guarantee the concentration of aerifing of the rivers of sluicing, avoid spillway structure cavitation erosion to destroy.

Description

Space energy dissipation and aerated spillway structure

Technical Field

The utility model relates to a spillway structure, especially a space energy dissipation and aerify spillway structure simultaneously.

Background

In water conservancy and hydropower engineering, for high-speed downward discharge of water flow, in order to reduce scouring of a natural river channel behind a dam and ensure the safety of a dam body, a spillway is often arranged on the dam body or the bank side so as to ensure the safety of a dam structure. Water flow is discharged from the spillway, when the energy dissipation of the spillway is insufficient, the flow velocity of the water flow is often too high, the turbulence of the water flow is strong, the problems of cavitation damage, torrent shock waves, structural vibration, serious atomization and the like can be caused, the engineering quantity of protective measures of energy dissipation facilities at the tail end of the spillway and downstream riverways can be increased, and the engineering investment is increased. The key to solve the above problems is how to utilize the structure of spillway to fully dissipate the energy of high-speed spillway water flow.

In recent years, step spillways are widely applied to engineering practice, energy dissipation effect of spillways is strengthened through collision between spillways and steps arranged on a spillway bottom plate, water flow whirling and rolling on the steps and turbulent shearing interaction inside water flow, energy dissipation rate of the spillways is improved, the defect that an end energy dissipater is too large is avoided, and energy dissipation buildings are safer to operate. However, the conventional step spillway only depends on steps to increase the energy loss of water flow, and the side wall of the spillway is not fully utilized for energy dissipation. When the width of the spillway is small or the discharge capacity is large, the single width flow is large, the requirements of flood discharge and energy dissipation are difficult to meet in the aspects of water head loss and energy dissipation rate along the way of the existing step spillway, and the steps also lose the aeration effect, so that cavitation erosion damage is generated on the wall surface of the spillway along the way. In some projects, a ventilation shaft is arranged on the side wall of the spillway, and a ventilation hole is arranged to aerate and reduce erosion of spillway discharged water, but because the ventilation hole is only arranged on the bottom plate of the spillway, the aeration range and the aeration capacity of spillway discharged water are limited, the sufficient aeration concentration of upper water in the discharged water cannot be ensured, and the condition of cavitation erosion damage still exists. Therefore, a more reasonable spillway structure is needed to be found, which can fully dissipate energy and aerate the high-speed discharged water flow, so as to avoid the damage of the spillway structure, reduce the flow velocity of the water flow at the outlet of the spillway, reduce the structural size of an energy dissipater at the tail end of the spillway, reduce the scouring depth of a downstream riverbed, and reduce the supporting range and the engineering quantity of bank slopes at both sides.

Disclosure of Invention

An object of the utility model is to provide a space energy dissipation and aerify spillway structure concurrently. The structure solves the problems that the conventional spillway is not fully utilized to dissipate energy of discharged water flow, aeration causes overlarge flow velocity of the discharged water flow, the aeration and erosion reduction effects are poor, the energy dissipater engineering quantity at the tail end of the spillway is large, the scouring depth of a downstream riverbed is deep, the supporting engineering quantity of two bank slopes is large and the like.

The technical scheme of the utility model: the utility model provides a space energy dissipation holds spillway structure of aerifing concurrently, including spillway bottom plate, the side of spillway bottom plate is spillway boundary wall, the interval is provided with the anti-arc energy dissipation bank of multichannel on the spillway bottom plate, the top surface of anti-arc energy dissipation bank is anti-arc curved surface, low reaches face perpendicular to spillway bottom plate, the vertical anti-arc fillet that is provided with on the spillway boundary wall inside wall in anti-arc energy dissipation bank low reaches, anti-arc fillet and the adjacent setting of anti-arc energy dissipation bank, anti-arc fillet top surface is anti-arc curved surface, low reaches face perpendicular to spillway boundary wall.

In the above structure, the width of the reverse arc energy dissipation ridge is the same as the width of the bottom plate of the spillway, and the height of the reverse arc energy dissipation ridge is lower than the depth of the water flowing down from the spillway.

In the above-mentioned structure of spatial energy dissipation and aerated spillway, the spillway side wall of the downstream face of the partial reverse arc fillet is provided with an air vent, and the air vent is communicated with an air vent vertical shaft vertically arranged on the outer side wall of the spillway side wall.

In the aforesaid space energy dissipation and aerify spillway structure of overflowing, the air vent is provided with more than 2 along spillway side wall direction of height interval, and wherein the air vent and the spillway bottom plate surface parallel and level of bottommost, the air vent top elevation of topmost is less than spillway discharge flow depth of water.

The utility model has the advantages that: compared with the prior art, the utility model discloses an overflow spillway structure has set up anti-arc energy dissipation bank in overflow spillway bottom plate, has set up the silo and the blow vent of ventilating of anti-arc fillet and a certain quantity on overflow spillway side wall for this utility model has following effect:

(1) The setting of spillway bottom plate anti-arc energy dissipation bank has changed the flow form of spillway rivers of leaking down, and bottom rivers receive the top of anti-arc energy dissipation bank to hold in the palm the effect, and the direction of oblique top, with upper portion rivers interact, increase the interact of water self, have strengthened the energy dissipation power of spillway self greatly, reduce the rivers velocity of flow of leaking down.

(2) The setting of spillway side wall reverse arc fillet when carrying out the energy dissipation to the rivers of leaking down, the rivers of both sides side wall department produce certain direction to spillway middle part by the effect of reverse arc fillet, and spillway bottom plate rivers produce certain oblique upward direction by the effect of reverse arc energy dissipation bank, increase spillway under the water self three-dimensional space's of leaking down mutual extrusion, collision, the effect of mixing, the space energy dissipation effect of reinforcing spillway.

(3) The combined action of the reverse arc energy dissipation ridge and the reverse arc fillet changes the water flow discharge form of the conventional spillway, the water flow discharge form of the spillway is changed from a two-dimensional form to a three-dimensional space diffusion form, the structure of the spillway is fully utilized, the water flow discharge energy can be continuously consumed, the water flow speed of the spillway is reduced, the structural size of energy dissipation facilities connected with the spillway is reduced, the scouring depth of a downstream riverbed is reduced, the shoreside slope support range and the engineering quantity of two banks are reduced, and the engineering investment is saved.

(4) Spillway side wall anti-arc angle of application afterbody forms and falls the bank to set up the shaft and the blow vent of ventilating in anti-arc angle of application afterbody fall bank and spillway side wall department of meeting, every number of ventilating shaft bottom blow vent is no less than 2, arrange in different elevations, form natural cavity of ventilating, can guarantee the aeration of spillway underdrain water bottom, can guarantee the aeration of underdrain water well upper portion again, guarantee the aeration concentration of spillway nearly wall water, avoid the spillway structure cavitation erosion to destroy.

Comprehensively, the structure is provided with the reverse arc energy dissipation bank on the spillway bottom plate, the reverse arc attaching corners are arranged on the spillway side walls, the reverse arc energy dissipation bank and the reverse arc attaching corners jointly act to dissipate energy of discharged water continuously, the water discharge state of a conventional spillway is changed, the discharged water of the spillway is guided to the upper part and the middle part of the spillway from the spillway bottom plate and the spillway side walls, the discharged water is changed into a three-dimensional space diffusion state from a two-dimensional state, the structure of the spillway is fully utilized, the energy of the discharged water can be consumed continuously, the flow speed of the spillway is reduced, the structural size of energy dissipation facilities connected with the spillway is reduced, the scouring depth of a downstream riverbed is reduced, the shoreside slope supporting range and the engineering quantity are reduced, the engineering investment is saved, meanwhile, the ventilation shafts are arranged on the spillway side walls at certain distances, the number of the bottoms of each ventilation shaft is not less than 2, the ventilation holes are arranged at different elevations, the air leakage of the bottom of the spillway can be ensured, the air leakage of the spillway can be ensured, and the damage of the water body near the spillway structure of the spillway can be avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals: 1-spillway floor; 2-spillway side walls; 3-reverse arc energy dissipation ridge; 4-reverse arc corner fitting; 5-is a ventilation vertical shaft; 6-Vent.

Detailed Description

The present invention will be further described with reference to the drawings and examples, which should not be construed as a limitation to the present invention.

The embodiment of the utility model provides a: the utility model provides a space energy dissipation and aerify spillway structure of overflowing flood, as shown in figure 1, including spillway bottom plate 1, spillway bottom plate 1's side is spillway boundary wall 2, sets up anti-arc energy dissipation bank 3 on spillway bottom plate 1, and 3 bottom surfaces of anti-arc energy dissipation bank are laminated with spillway bottom plate 1, and the top surface is anti-arc curved surface, and low reaches face perpendicular to spillway bottom plate 1. The width of the reverse arc energy dissipation ridge 3 is consistent with that of the spillway bottom plate 1, the length and the height can be flexibly adjusted according to the actual engineering situation, and the height of the reverse arc energy dissipation ridge is lower than the depth of the spillway water flow.

An inverse arc fillet 4 is vertically arranged on the inner side wall of the spillway side wall 2 next to the downstream side of the inverse arc energy dissipation ridge 3, and the inverse arc radius and the structural size of the inverse arc fillet 4 can be flexibly adjusted according to the actual engineering situation. The bottom surface of the reverse arc fillet 4 is attached to the spillway side wall 2, the top surface is a reverse arc curved surface, and the downstream surface is perpendicular to the spillway side wall 2, so that the spillway side wall 2 forms a drop sill structure arranged at intervals, and the spillway side wall 2 can be fully utilized to dissipate energy of a spillway water body. The reverse arc energy dissipation ridge 3 and the reverse arc fillet 4 are combined and arranged, and are continuously arranged on the spillway according to a certain spacing distance, so that continuous energy dissipation is performed on spillway discharging water flow.

The partial spillway 2 lateral walls that are close to 4 downstream faces of anti-arc fillet are provided with the vertical shaft 5 that ventilates on to be provided with the blow vent 6 with the 5 intercommunications of shaft of ventilating on spillway lateral wall 2, blow vent 6 sets up on the spillway lateral wall 2 of 4 downstream faces of anti-arc fillet, in order to fully aerify the rivers that let down. The number of the ventilation vertical shafts 5 and the number of the ventilation openings 6 are set according to engineering requirements, so that the aeration concentration of the water body close to the wall of the spillway is ensured, and cavitation damage is avoided.

The number of the vent holes 6 at the bottom of each vent shaft 5 on the spillway side wall 2 is not less than 2, one vent hole 6 is arranged at the connecting position of the vent shaft 5 and the spillway bottom plate 1, the rest vent holes 6 are arranged on the spillway side wall 2 according to a certain vertical distance, and the top elevation of the uppermost vent hole 6 is lower than the depth of the spillway down-discharge water flow so as to ensure that the spillway side wall plays a role in aeration.

Claims (4)

1. The utility model provides a space energy dissipation holds air entrainment spillway structure concurrently, is spillway lateral wall (2), its characterized in that including spillway bottom plate (1), the side of spillway bottom plate (1): the spillway bottom plate (1) is gone up the interval and is provided with multichannel anti-arc energy dissipation bank (3), the top surface of anti-arc energy dissipation bank (3) is anti-arc curved surface, low reaches face perpendicular to spillway bottom plate (1), the spillway side wall (2) the inside wall in the low reaches of anti-arc energy dissipation bank (3) is vertical to be provided with anti-arc fillet (4), anti-arc fillet (4) and anti-arc energy dissipation bank (3) are adjacent to be set up, anti-arc fillet (4) top surface is anti-arc curved surface, low reaches face perpendicular to spillway side wall (2).

2. The spatial energy dissipation and aeration spillway structure of claim 1, wherein: the width of the reverse arc energy dissipation ridge (3) is consistent with that of the spillway bottom plate (1), and the height of the reverse arc energy dissipation ridge is lower than the depth of the spillway drainage water.

3. The spatial energy dissipation and aeration spillway structure of claim 1, wherein: the spillway side wall (2) of the downstream face of the partial reverse arc fillet (4) is provided with an air vent (6), and the air vent (6) is communicated with an air vent vertical shaft (5) which is vertically arranged on the outer side wall of the spillway side wall (2).

4. The spatial energy dissipation and aeration spillway structure of claim 3, wherein: blow vent (6) are provided with more than 2 along spillway boundary wall (2) direction of height interval, wherein blow vent (6) and spillway bottom plate (1) surface parallel and level of bottommost, and blow vent (6) top elevation of topmost is less than spillway and leaks the rivers depth of water.

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