CN204080761U - For the absorption basin structure of high-velocity flow - Google Patents
For the absorption basin structure of high-velocity flow Download PDFInfo
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- CN204080761U CN204080761U CN201420627022.6U CN201420627022U CN204080761U CN 204080761 U CN204080761 U CN 204080761U CN 201420627022 U CN201420627022 U CN 201420627022U CN 204080761 U CN204080761 U CN 204080761U
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Abstract
The utility model discloses a kind of absorption basin structure, especially disclose a kind of absorption basin structure for high-velocity flow, belong to Design of The Hydraulic Structure manufacturing technology field.There is provided a kind of effect of energy dissipation good, arrange the absorption basin structure for high-velocity flow being subject to the restriction of landform, geological conditions little.Described absorption basin structure comprises protection-apron section, high-velocity flow guides hole and absorption basin body, described absorption basin body is arranged in described high-velocity flow along water (flow) direction and guides between the tail end in hole and the head end of described protection-apron section, guide between the tail end in hole at the head end of described absorption basin body and described high-velocity flow and be also provided with gentle slope changeover portion, described absorption basin structure also comprises falls Kan Chi, the described Kan Chi of falling is arranged in the bottom of described absorption basin body, is also provided with the power of disappearing falls bank in the junction of the described Kan Chi of falling and described gentle slope changeover portion tail end.
Description
Technical field
The utility model relates to a kind of absorption basin structure, especially relates to a kind of absorption basin structure for high-velocity flow, belongs to Design of The Hydraulic Structure manufacturing technology field.
Background technology
Along with country is to the demand of water power clean energy resource, build a large amount of power stations, the corresponding high flow rate flood discharging tunnel built for flood discharge.For low water head, large discharge or limit by downstream geology, orographic condition, flood discharge hole outlet often adopts disspation through hydraudic jimp.The representative engineering measure of disspation through hydraudic jimp most is exactly absorption basin, as shown in Figure 3
In order to ensure to form hydraulic jump in absorption basin, at the bottom of absorption basin, elevation is lower, thus needs the linkage section of certain length between flood discharge hole outlet and absorption basin, and flood discharge hole outlet is connected smoothly with absorption basin.
Common connected mode is ramp type, and this form of structure is simple, easy construction, lower for head, discharge per unit width is less, and the not too limited flood discharge hole outlet of landform, geological conditions often adopts this connected mode.
Existing this slope connects the power mode that disappears and has following shortcoming:
1, in slope interconnection system absorption basin, water level fluctuation is violent, and go out bank current irregularity, absorption basin goes out pond current and easily occurs that secondary falls phenomenon, and downstream is washed away comparatively serious, required preventive works amount and difficulty higher;
2, linkage section consumed energy in slope is lower, and therefore absorption basin underflow speed is higher, and base plate aeration concentrater is low, and pressure fluctuation meter is comparatively large, remains in other factors such as the construction waste in absorption basin, bank Rolling Stone, constuction joint, cavitation erosion easily occurs if add;
3, along with flood discharge scale is increasing, absorption basin discharge per unit width increases gradually, and absorption basin, protection-apron length increase thereupon, and cause excavated volume and amount of concrete greatly, construction costs is higher.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of effect of energy dissipation good, arranges the absorption basin structure for high-velocity flow being subject to the restriction of landform, geological conditions little.
For solving the problems of the technologies described above adopted technical scheme be: a kind of absorption basin structure for high-velocity flow, comprise protection-apron section, high-velocity flow guides hole and absorption basin body, described absorption basin body is arranged in described high-velocity flow along water (flow) direction and guides between the tail end in hole and the head end of described protection-apron section, guide between the tail end in hole at the head end of described absorption basin body and described high-velocity flow and be also provided with gentle slope changeover portion, described absorption basin structure also comprises falls Kan Chi, the described Kan Chi of falling is arranged in the bottom of described absorption basin body, also be provided with in the junction of the described Kan Chi of falling and described gentle slope changeover portion tail end the power of disappearing and fall bank.
Further, the angle between the projection of the upper surface of described gentle slope changeover portion longitudinally in its vertical plane and horizontal plane is no more than 3 °.
Further, the elevation of the base plate of described protection-apron section is higher than the elevation of the head end base plate of described gentle slope changeover portion.
Be further, the baffle wall style perpendicular to water (flow) direction is also provided with at described protection-apron section head end and described junction of falling bank pond tail end, the head end of described baffle wall style and the tail end of the described Kan Chi of falling are gentle slope transition connecting structure, and the elevation of the end face of described baffle wall style is higher than the elevation of the base plate of described protection-apron section.
Further, the head end of described baffle wall style tail end and described protection-apron section is also gentle slope transition connecting structure.
Further, the described power of disappearing falls bank by being connected to described gentle slope changeover portion tail end and the described vertical stratification fallen between the head end of bank pond is formed.
The preferred embodiment of such scheme is, described in fall Kan Chi and described absorption basin body is structure as a whole.
The beneficial effects of the utility model are: fall Kan Chi owing to having set up one in existing absorption basin structure, and fall the bottom that Kan Chi is arranged in described absorption basin body described in making, the power of disappearing is set in the junction of the described Kan Chi of falling and described gentle slope changeover portion tail end again and falls bank.Like this, due to the existence having the power of disappearing to fall bank, hydraulic jump can be made to fall bank in the power of disappearing of gentle slope changeover portion tail end and make again the Kan Chu that slumps be formed, water level fluctuation is increased, and seethed by the violent rotary roll of current, the energy dissipating of energy dissipater is more abundant; The absorption basin energy dissipating of this bank interconnection system that slumps is more abundant, and absorption basin bottom velocity is lower, and Pressure Fluctuation is less, effectively can reduce or remit cavitation erosion; And the build of this bank linkage section that slumps is simple, limit less by downstream geology, orographic condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model for the absorption basin structure of high-velocity flow;
Fig. 2 is the 2-2 sectional view of Fig. 1;
Fig. 3 is the structural representation of the existing absorption basin structure of the utility model.
Be labeled as in figure: protection-apron section 1, high-velocity flow guide hole 2, absorption basin body 3, gentle slope changeover portion 4, fall bank pond 5, the power of disappearing falls bank 6, baffle wall style 7, vertical stratification 8.
Detailed description of the invention
For the ease of understanding the technical scheme of certainly application, now technical term is wherein further explained.
High-velocity flow: flow velocity is greater than 20m/s current;
Disspation through hydraudic jimp: take certain engineering measure such as absorption basin to control hydraulic jump position at lower exit, current generation hydraulic jump, form rotary roll, make the energy of current hit ﹑ friction by the phase knock against each other mixing gas ﹑ hydrone and have consumption to a certain degree, to reduce or to prevent downstream from occurring seriously to wash away;
Absorption basin: impel the energy-dissipating installation producing underflow type hydraulic jump in outlet structure escape works downstream;
Cavitation: at normal temperatures, be below vaporization pressure because pressure is reduced to a certain critical numerical value water, current inside forms the phenomenon of hole, cavity or cavity to liquid;
Cavitation corrosion: refer to cavitation bubble crumble and fall building or equipment are caused damage, to degrade or damaged.
Be that a kind of effect of energy dissipation that the utility model provides is good as shown in Figure 1 and Figure 2, arrange the absorption basin structure for high-velocity flow being subject to the restriction of landform, geological conditions little.Described absorption basin structure comprises protection-apron section 1, high-velocity flow guides hole 2 and absorption basin body 3, described absorption basin body 3 is arranged in described high-velocity flow along water (flow) direction and guides between hole 2 tail end and the head end of described protection-apron section 1, guide between the tail end in hole 2 at the head end of described absorption basin body 3 and described high-velocity flow and be also provided with gentle slope changeover portion 4, described absorption basin structure also comprises falls bank pond 5, describedly fall the bottom that bank pond 5 is arranged in described absorption basin body 3, be also provided with the junction of described gentle slope changeover portion 4 tail end the power of disappearing fall bank 6 in described bank pond 5 of falling.Fall bank pond 5 owing to having set up one in existing absorption basin structure, and described in making, fall the bottom that bank pond 5 is arranged in described absorption basin body 3, the power of disappearing is set in described junction of falling bank pond 5 and described gentle slope changeover portion 4 tail end again and falls bank 6.Like this, due to the existence having the power of disappearing to fall bank 6, hydraulic jump can be made to fall bank 6 in the power of disappearing of gentle slope changeover portion 4 tail end and make again the Kan Chu that slumps be formed, water level fluctuation is increased, and seethed by the violent rotary roll of current, the energy dissipating of energy dissipater is more abundant; The absorption basin energy dissipating of this bank interconnection system that slumps is more abundant, and absorption basin bottom velocity is lower, and Pressure Fluctuation is less, effectively can reduce or remit cavitation erosion; And the build of this bank linkage section that slumps is simple, limit less by downstream geology, orographic condition.
Simultaneously, to fall the fluctuation energy dissipating of Kan6Chu in the power of disappearing in order to increase high-velocity flow, simultaneously, its harm can not be increased again, in conjunction with in prior art, angle between the projection of the upper surface of described gentle slope changeover portion 4 longitudinally in its vertical plane and horizontal plane, higher than the design feature of the elevation of the head end base plate of described gentle slope changeover portion 4, is no more than 3 ° by the elevation of the base plate of described protection-apron section 1; The baffle wall style 7 perpendicular to water (flow) direction is also provided with at described protection-apron section 1 head end and described junction of falling bank pond 5 tail end, the head end of described baffle wall style 7 is that gentle slope transition is connected with the described tail end falling bank pond 5, and the elevation of the end face of described baffle wall style 7 is higher than the elevation of the base plate of described protection-apron section 1; The head end of described baffle wall style 7 tail end and described protection-apron section 1 is also for gentle slope transition is connected.
In above-mentioned embodiment, in order to the power of disappearing described in simplifying falls the structure of bank 6, conveniently build construction, the described power of disappearing is fallen bank 6 and be set to by being connected to described gentle slope changeover portion 4 tail end and the described structure of falling the vertical stratification 8 between the head end of bank pond 5 and forming; And described in fall bank pond 5 and be structure as a whole with described absorption basin body 3.Thus the most limit simplify the structure that the power of disappearing falls bank 6, and reduce the length of absorption basin body 3 and protection-apron section 1 to greatest extent, reduce excavated volume and amount of concrete, reduce construction costs.
Claims (7)
1. the absorption basin structure for high-velocity flow, comprise protection-apron section (1), high-velocity flow guides hole (2) and absorption basin body (3), described absorption basin body (3) along water (flow) direction be arranged in described high-velocity flow guide hole (2) tail end and the head end of described protection-apron section (1) between, guide between the tail end of hole (2) at the head end of described absorption basin body (3) and described high-velocity flow and be also provided with gentle slope changeover portion (4), it is characterized in that: described absorption basin structure also comprises falls Kan Chi (5), the described Kan Chi of falling (5) is arranged in the bottom of described absorption basin body (3), also be provided with the junction of described gentle slope changeover portion (4) tail end the power of disappearing at the described Kan Chi of falling (5) and fall bank (6).
2. the absorption basin structure for high-velocity flow according to claim 1, is characterized in that: the angle between the projection longitudinally in its vertical plane of the upper surface on described gentle slope changeover portion (4) and horizontal plane is no more than 3 °.
3. the absorption basin structure for high-velocity flow according to claim 1 and 2, is characterized in that: the elevation of the base plate of described protection-apron section (1) is higher than the elevation of the head end base plate on described gentle slope changeover portion (4).
4. the absorption basin structure for high-velocity flow according to claim 3, it is characterized in that: be also provided with the baffle wall style (7) perpendicular to water (flow) direction in the junction of described protection-apron section (1) head end and the described Kan Chi of falling (5) tail end, head end and the tail end of the described Kan Chi of falling (5) of described baffle wall style (7) are that gentle slope transition is connected, and the elevation of the end face of described baffle wall style (7) is higher than the elevation of the base plate of described protection-apron section (1).
5. the absorption basin structure for high-velocity flow according to claim 4, is characterized in that: the head end of described baffle wall style (7) tail end and described protection-apron section (1) is also for gentle slope transition is connected.
6. the absorption basin structure for high-velocity flow according to claim 3, is characterized in that: the described power of disappearing is fallen bank (6) and is made up of the vertical stratification (8) be connected between described gentle slope changeover portion (4) tail end and the described Kan Chi of falling (5) head end.
7. the absorption basin structure for high-velocity flow according to claim 1, is characterized in that: described in fall Kan Chi (5) and described absorption basin body (3) and be structure as a whole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420627022.6U CN204080761U (en) | 2014-10-27 | 2014-10-27 | For the absorption basin structure of high-velocity flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695391A (en) * | 2015-02-13 | 2015-06-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Diffusion type inverse step rectification and energy dissipation method and absorption basin |
| CN106948319A (en) * | 2017-05-08 | 2017-07-14 | 中国水利水电科学研究院 | A kind of fluted non-horizontal base plate of band falls energy dissipater and the method for bank stiling basin |
-
2014
- 2014-10-27 CN CN201420627022.6U patent/CN204080761U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695391A (en) * | 2015-02-13 | 2015-06-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Diffusion type inverse step rectification and energy dissipation method and absorption basin |
| CN106948319A (en) * | 2017-05-08 | 2017-07-14 | 中国水利水电科学研究院 | A kind of fluted non-horizontal base plate of band falls energy dissipater and the method for bank stiling basin |
| CN106948319B (en) * | 2017-05-08 | 2018-05-04 | 中国水利水电科学研究院 | A kind of fluted non-horizontal bottom plate of band falls energy dissipater and the method for bank stiling basin |
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