CN217078657U - From aeration space diffusion flip bucket structure - Google Patents

From aeration space diffusion flip bucket structure Download PDF

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Publication number
CN217078657U
CN217078657U CN202120350465.5U CN202120350465U CN217078657U CN 217078657 U CN217078657 U CN 217078657U CN 202120350465 U CN202120350465 U CN 202120350465U CN 217078657 U CN217078657 U CN 217078657U
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China
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flip bucket
bottom plate
arc
diffusion
flip
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CN202120350465.5U
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Chinese (zh)
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王瑞
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China Hydropower Consulting Group Guiyang Survey And Design Institute Of Geotechnical Engineering Co ltd
PowerChina Guiyang Engineering Corp Ltd
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China Hydropower Consulting Group Guiyang Survey And Design Institute Of Geotechnical Engineering Co ltd
PowerChina Guiyang Engineering Corp Ltd
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Abstract

The utility model discloses a from aerifing space diffusion flip bucket structure, including let-off groove bottom plate and flip bucket arc bottom plate, flip bucket arc bottom plate with tangent form with the let-off groove bottom plate meets to set up the diffusion mound on flip bucket arc bottom plate, the diffusion mound is the triangle body structure, and the bottom surface is located on flip bucket arc bottom plate, and both sides face is with 1: the slope of 1 is connected with the flip bucket arc-shaped bottom plate, and the downstream surface is connected with the tail end of the flip bucket arc-shaped bottom plate at a certain angle. The flip bucket changes the structural form of the conventional flip bucket, and the diffusion piers are arranged on the arc-shaped bottom plate of the flip bucket at the outlet of the spillway or the flood discharge hole chute, so that the collision and mixing effects of the water tongues in the air are enhanced; a ventilation vertical shaft and an air inlet are arranged on the side wall at the connecting position of the discharge chute and the flip bucket, and the discharged water flow is aerated independently and fully; the arc-shaped fillet is arranged at the outlet position of the flip bucket side wall, so that the guide of the water tongue and the position of the water tongue entering a downstream riverbed are effectively controlled, and the purposes of benefiting the guide by the force and fully dissipating energy of the discharged water flow can be achieved.

Description

Self-aeration space diffusion flip bucket structure
Technical Field
The utility model relates to a from aerifing space diffusion flip bucket structure belongs to hydraulic and hydroelectric engineering technical field, is applicable to the design and the construction of spillway or flood discharge hole chute export flip bucket structure.
Background
In dam outlet structures at home and abroad, the trajectory energy dissipation mode is most widely applied and is suitable for projects with good downstream river geological conditions. The basic principle of trajectory energy dissipation is to utilize the huge kinetic energy carried by high-speed water flow to direct the water flow to the downstream far away from the building, so that the safety of the building is not endangered by the scouring of the falling water tongue on the river bed. The water flow should be dispersed as much as possible in the air and underwater range, so as to be beneficial to killing a large amount of energy through water body shearing and mixing, and reducing the scouring on the riverbed. The key of the flip energy dissipation lies in the selection of flip bucket body types, and with the development of dam construction, the flip bucket body types with characteristics appear in succession, wherein the continuous flip bucket, the differential flip bucket, the inclined flip bucket, the narrow-slit flip bucket, the tongue-shaped flip bucket and the like are widely applied.
The continuous flip bucket and the differential flip bucket are suitable for projects with wide riverbeds of downstream riverways and small terrain changes; the inclined flip bucket can guide and longitudinally stretch the downward drainage water flow to a certain extent; the narrow-slit flip bucket is suitable for projects with narrower downstream river channels; the tongue-shaped flip bucket is suitable for engineering with a wider downstream river channel, and the conventional flip buckets have various characteristics and different engineering applicability, but have certain limitations. At present, three prominent problems mainly exist in the conventional flip bucket: one is that the space diffusion capacity to the water tongue is insufficient, so that the water tongue is collided in the air, the mixing effect is limited, the positions falling into the downstream river channel are relatively concentrated, the energy dissipation of the water cushion of the downstream river channel cannot be fully utilized, and the scouring depth to the downstream river bed is larger; one is that the control capability of the water falling point of the water tongue is poor, the water falling tongue is easy to impact the bank slopes on two sides, and large-scale engineering protection needs to be carried out on the bank slopes on two sides to avoid erosion damage; the other is that no special aeration facility is considered, the flow velocity at the flip bucket at the outlet of the spillway or spillway chute of the spillway is the largest, and conventionally, when the flow velocity of the spillway is more than 35m/s, the bottom plate and the side wall of the flip bucket are easily subjected to cavitation damage, so that the safety of the structure is endangered. Therefore, a more reasonable flip bucket structure is needed to solve the above three problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a from aerifing space diffusion flip bucket structure to prior art's not enough.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model discloses a from aerify space diffusion flip bucket structure, including let-off groove bottom plate and flip bucket arc bottom plate, flip bucket arc bottom plate with tangent form with the let-off groove bottom plate meets to set up the diffusion mound on flip bucket arc bottom plate, the diffusion mound is the triangle body structure, and the bottom surface is located on flip bucket arc bottom plate, and both sides face is with 1: the slope of 1 is connected with the flip bucket arc-shaped bottom plate, and the downstream surface is connected with the tail end of the flip bucket arc-shaped bottom plate at a certain angle.
Furthermore, a ventilation vertical shaft is arranged on the side wall of the discharge groove connected with the flip bucket, and an air inlet is arranged at the bottom of the ventilation vertical shaft. An arc-shaped fillet is arranged at the outlet of the side wall, and the surface of the arc-shaped fillet adopts an arc-shaped curve to form a certain inward angle.
The flip bucket structure is provided with the diffusion piers on the flip bucket arc-shaped bottom plate at the outlet position of the spillway or the spillway chute of the spillway tunnel, so that the flow state of the spillway water flow is changed, the two-dimensional spillway water flow is changed into the three-dimensional space diffusion spillway water flow, the collision and mixing effects of the water tongues in the air are enhanced, the range of the water flow falling into the downstream river channel is enlarged, the energy dissipation of the downstream river channel water cushion is fully utilized, the energy dissipation power of the downstream river channel is increased, and the scouring effect on the downstream river bed is reduced; the side wall at the connecting position of the chute and the flip bucket is provided with the ventilation vertical shaft and the air inlet hole, so that the downward discharging water flow can be fully aerated independently, a large amount of air is forced to be mixed into the water flow under the turbulent action of the high-speed water flow, the phenomenon of mixing of air and water is formed, the aeration concentration of a water body is ensured, the occurrence of cavitation damage of a bottom plate and the side wall of the flip bucket is avoided, and the safety of the structure is ensured; meanwhile, the arc-shaped fillet is arranged at the outlet of the flip bucket side wall, so that the guide of the water tongue and the position of the water tongue entering a downstream riverbed can be effectively controlled, the water tongue is prevented from scouring the bank slopes on two sides, the protection work amount of the bank slopes on two sides is reduced, the water tongue is guided to the middle part by the arc-shaped fillet, and the self collision and mutual energy dissipation of the water tongue are further promoted.
The utility model discloses a core innovation point lies in providing one kind from aerifing the space diffusion flip bucket structure, and this flip bucket structure has set up the diffusion mound on the flip bucket arc bottom plate of spillway or flood discharge hole chute exit position, has set up ventilation shaft and inlet port on the side wall that chute and flip bucket meet the position, sets up the arc angle of subsides in flip bucket side wall exit position, has changed the structural style of conventional flip bucket, has following effect:
(1) the setting of diffusion mound makes the combined action that lets down the rivers and receive flip bucket arc bottom plate and diffusion mound, because the difference of elevation and structure can form different angle of jettison, and each rivers particle moves on vertical face with different speed and angle, and is tensile in the motion of vertical formation thin fan form, and simultaneously, diffusion mound both sides face is 1: 1 slope, can receive the top of adjacent two diffusion mounds side when rivers let off from between the diffusion mound and hold in the palm the effect, with the nappe direction diffusion mound upper portion and middle part, can make high-speed rivers that let off extrude each other, collision energy dissipation, so, increased nappe self collision and the effect of mixing, increased nappe aerial self energy dissipation power, and form three-dimensional space diffusion, enlarge the body of letting off into water scope, make full use of low reaches river course water blanket energy dissipation, increase low reaches riverbed energy dissipation power, alleviate the erodeing to low reaches riverbed, reduce the protection engineering volume of low reaches riverway, reduce the engineering investment.
(2) The arrangement of the ventilation vertical shaft and the air inlet holes can carry out autonomous and sufficient aeration on the downward-discharging water flow, and a large amount of air is forced to be mixed into the water flow under the turbulent action of the high-speed water flow, so that the phenomenon of mixing of air and water is formed, the aeration concentration of a water body is ensured, the occurrence of cavitation erosion damage on a bottom plate and a side wall of a flip bucket is avoided, and the safety of a structure is ensured.
(3) The arc-shaped fillet is arranged, the guiding of the nappe and the position of entering a downstream riverbed can be effectively controlled by adjusting the curvature radius and the structural size of the reverse arc fillet, the nappe is prevented from scouring bank slopes on two sides, the protection work amount of the bank slopes on two sides is reduced, the nappe is guided to the middle part by the arc-shaped fillet, and the self collision and mutual mixing energy dissipation of the nappe are further promoted.
Drawings
FIG. 1 is a perspective view of the present invention;
fig. 2 is a plan view of the present invention.
The labels in the figures are: 1-chute bottom plate; 2-side walls; 3-flip bucket arc bottom plate; 4-diffusion pier; 5-arc corner fitting; 6-a ventilation shaft; 7-air inlet hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the following detailed description of the embodiments of the present invention will be made with reference to fig. 1 to 2.
As shown in fig. 1 and 2, the utility model comprises the following components: the air inlet structure comprises a chute bottom plate 1, a side wall 2, a flip bucket arc-shaped bottom plate 3, a diffusion pier 4, an arc-shaped fillet 5, a ventilation shaft 6 and an air inlet 7. The main characteristics are as follows:
for guaranteeing the smoothness that rivers let off down, flip bucket arc bottom plate 3 connects with let out tank bottom plate 1 with tangent form to set up diffusion mound 4 on flip bucket arc bottom plate 3, diffusion mound 4 is the triangle body structure, and the bottom surface is located on flip bucket arc bottom plate 3, and both sides face is with 1: the slope of 1 is met with flip bucket arc bottom plate 3, and the low reaches face meets with 3 ends of flip bucket arc bottom plate with certain angle, and wherein, the low reaches face should not surpass 3 ends of flip bucket arc bottom plate, avoids forming the underslung structure, is unfavorable for the stability of structure. When the water flow that leaks is let down by diffusion mound 4, can lead rivers to diffusion mound 4 upper portion, middle part, and the structure size of diffusion mound 4 can be adjusted according to engineering actual conditions is nimble, sets up quantity and should not be less than 2, and when the groove bottom plate 1 broad of letting out, its quantity can suitably increase.
And a ventilation vertical shaft 6 is arranged on the side wall 2 of the discharge chute connected with the flip bucket, and an air inlet 7 is arranged at the bottom of the ventilation vertical shaft 6 so as to fully aerate and reduce corrosion of the discharged water flow. The structural sizes of the ventilation vertical shaft 6 and the air inlet 7 are set according to engineering requirements, so that the aeration concentration of the water body close to the flip bucket is not lower than 7%.
2 exit position of flip bucket sidewall sets up arc fillet 5, and arc curve is adopted on 5 surfaces of arc fillet, forms certain inward angle, and the structural dimension of arc fillet 5 sets up according to the engineering needs, can lead rivers to the riverbed middle part, avoids rivers impact low reaches river course both sides bank slope.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications and equivalents may be made without departing from the spirit and scope of the invention.

Claims (3)

1. The utility model provides a from aerifing space diffusion flip bucket structure which characterized in that: including let out tank bottom plate (1) and flip bucket arc bottom plate (3), flip bucket arc bottom plate (3) with tangent form with let out tank bottom plate (1) meet to set up diffusion mound (4) on flip bucket arc bottom plate (3), diffusion mound (4) are the triangle body structure, and the bottom surface is located on flip bucket arc bottom plate (3), and both sides face is with 1: the slope of the step 1 is connected with the flip bucket arc-shaped bottom plate (3), and the downstream surface is connected with the tail end of the flip bucket arc-shaped bottom plate (3) at a certain angle.
2. The self-aerating space diffusion flip bucket structure of claim 1, further comprising: a ventilation vertical shaft (6) is arranged on the side wall (2) of the chute connected with the flip bucket, and an air inlet (7) is arranged at the bottom of the ventilation vertical shaft (6).
3. The self-aerating space diffusion flip bucket structure of claim 2, further comprising: an arc-shaped fillet (5) is arranged at the outlet position of the side wall (2), and an arc-shaped curve is adopted on the surface of the arc-shaped fillet (5) to form a certain inward angle.
CN202120350465.5U 2021-02-08 2021-02-08 From aeration space diffusion flip bucket structure Active CN217078657U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120350465.5U CN217078657U (en) 2021-02-08 2021-02-08 From aeration space diffusion flip bucket structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120350465.5U CN217078657U (en) 2021-02-08 2021-02-08 From aeration space diffusion flip bucket structure

Publications (1)

Publication Number Publication Date
CN217078657U true CN217078657U (en) 2022-07-29

Family

ID=82497236

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120350465.5U Active CN217078657U (en) 2021-02-08 2021-02-08 From aeration space diffusion flip bucket structure

Country Status (1)

Country Link
CN (1) CN217078657U (en)

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