CN209652885U - Chamfer skew bucket structure - Google Patents

Abstract

The utility model relates to water conservancy and hydropower sluicing facility fields, especially one kind is in the biggish situation of operating head polishing luffing, by preferably adjusting flow direction so as to adjust choosing angle, and overflow drop point can be made to be in the beveling skew bucket structure of perfect condition always, including leftwall and RightWall, it is provided between the leftwall and RightWall and chooses bank runner bottom surface structure, the bank runner bottom surface structure of choosing is constituted by choosing to paste angle inclined-plane on the right side of bank and choose inclined-plane on the left of bank.The utility model is to the change of original structure also very little, but very cleverly effect can be obtained, it is big to be particularly suitable for operating water level amplitude of fluctuation, and underwater bed is narrow, so that trajectory nappe easily pounds this bank when small flow, big flow Shi Zeyi washes away opposite bank, and its large and small flow rate working conditions is difficult to the case where taking into account.

Description

Chamfer skew bucket structure

Technical field

The utility model relates to water conservancy and hydropower sluicing facility field, especially a kind of beveling skew bucket structure.

Background technique

According to the applicable elements of sluicing energy dissipation below spillway mode, in the discharge structure of middle and high head, the lower stream that sluices is moved Can be larger, frequently with flip trajectory bucket mode in engineering.

When downstream river course is narrow, lets out fluted shaft line and the larger river center line angle of cut, in order to make trajectory nappe choose fall in it is pre- Fixed position, mitigates influence of the trajectory nappe to bank slope, often selects beveling skew bucket.It chamfers Kan Kanding and flow direction is oblique It hands over, chooses away from evolution with distance；Bottom plate is arranged to the continuous pinch plane that long abutment wall side is high, short side wall side is low by distortion bank, makes overflow in sky Middle overturning simultaneously falls in riverbed approximate centerline.Beveling skew bucket is integrated with the advantages of bank and skew bucket are chosen in beveling, transports extensively The bank discharge structure narrow for river valley.

Under the biggish engineering specifications of operating water level luffing, as the requirement for meeting low water level operating condition and not pounding this bank, Yi Caiyong It is larger to choose angle, the farther away design scheme of sater professionals；But under the narrow orographic condition of underwater bed, this scheme is in high water head work When condition, sater professionals are again excessive, seriously wash away opposite bank so as to cause water flow, cause the consequence for being unfavorable for opposite bank stability of slope. Vice versa, when meeting high water head operating condition and not washing away opposite bank, preferably use it is smaller choose away from scheme, but this scheme is in low-head operating When operating condition, choose away from again it is too small, water flow, which is pounded, falls this bank, influence choose camphyl plinth and this bank stability of slope.

Therefore conventional flip trajectory bucket structure under discharge operating conditions at different levels, is chosen away from differing larger, in narrow valley region, it is difficult to Meet the service requirement of the biggish discharge structure of operating water level luffing.

Utility model content

The technical problem to be solved by the utility model is to provide one kind in the biggish situation of operating head polishing luffing, passes through Preferable adjustment flow direction can make overflow drop point be in the beveling skew bucket knot of perfect condition always so as to adjust choosing angle Structure.

The technical scheme adopted by the utility model to solve the technical problem is as follows: beveling skew bucket structure, including the left side Wall and RightWall are provided between the leftwall and RightWall and choose bank runner bottom surface structure, described to choose bank runner bottom surface structure It is constituted by choosing to paste angle inclined-plane on the right side of bank and choose inclined-plane on the left of bank.

Further, the bank patch angle inclined-plane of choosing is close to RightWall side.

Further, horizontal plane is lower than horizontal plane where leftwall bottom where the RightWall bottom.

Further, the leftwall and RightWall are bell-mouth structure of air.

Further, the bell-mouth structure of air is hatch frame along water (flow) direction.

Further, the RightWall is vertical with patch angle inclined-plane on the right side of bank is chosen.

Further, the leftwall is vertical with inclined-plane on the left of bank is chosen.

The beneficial effects of the utility model are: the utility model is ingenious to construct " the side height for choosing bank runner bottom surface structure Side is low " design feature, and combine the characteristic of " water toward is located in stream ", obtain very ideal solution, it may be assumed that in low water When the operating condition of position, flow velocity is lower, and fluid inertia power is relatively small, larger by water body effect of weight, chooses at this point, water flow easily concentrates on Lower choose pastes inclined-plane side in angle on the right side of bank in bank runner bottom surface structure, pools as main flow area, and ultimately forms and have ideal The state of overflow drop point；And in high water level operating condition, water flow is since mainly by inertia force influence, mainstream is still to let out fluted shaft line side To the convergence effect of water flow then reduces at this time, and the overflow drop point formed is equally very ideal.Such design also ensures that No matter head size, can form the ideal overflow of drop point.The utility model but may be used to the change of original structure also very little To obtain very cleverly effect, it is big to be particularly suitable for operating water level amplitude of fluctuation, and underwater bed is narrow, so that working as small stream Trajectory nappe easily pounds this bank when amount, and big flow Shi Zeyi washes away opposite bank, and its large and small flow rate working conditions is difficult to the case where taking into account.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the structural schematic diagram after Fig. 1 removal RightWall.

In the figure, it is marked as RightWall 1, leftwall 2, choosing inclined-plane 3 on the left of bank, choosing and paste angle inclined-plane 4 on the right side of bank.

Specific embodiment

The present invention will be further described with reference to the accompanying drawing.

Beveling skew bucket structure as shown in Figure 1 and Figure 2, including leftwall 2 and RightWall 1, the leftwall 2 and the right side It is provided between abutment wall 1 and chooses bank runner bottom surface structure, the bank runner bottom surface structure of choosing is by choosing patch angle inclined-plane 4 on the right side of bank and choosing bank Left side inclined-plane 3 is constituted.

It is existing to choose bank structure, fluted shaft is let out once downstream river course below is narrow since structure designs existing defect When line and the larger river center line angle of cut, just it will appear because water flow pounds and falls this bank caused by head is small, or led because head is big The water flow of cause seriously washes away the case where opposite bank.The utility model be very cleverly utilized head greatly with head hour respective stream Dynamic feature and the characteristics of choose bank runner bottom surface structure, is chosen by setting and pastes angle inclined-plane 4 on the right side of bank, to make low water level operating condition Main flow area, which is raised, chooses point height, and angle is chosen in increasing, can effectively increase and choose away from solving the problems, such as that low water level operating condition overflow pounds this bank. And it is constant in high water level main flow area structural shape, its overflow mainstream form and drop point are not influenced.Bank operation adaptation is chosen to increase Eulittoral zone.Concretely, in low water level operating condition, flow velocity is lower, and fluid inertia power is relatively small, certainly by water body It is affected, at this point, water flow easily concentrates on and chooses lower choose in bank runner bottom surface structure and paste inclined-plane 4 side in angle on the right side of bank, converges again It is polymerized to as main flow area, and ultimately forms the state with ideal overflow drop point；And in high water level operating condition, water flow due to mainly by Inertia force influence, mainstream are still to let out slot axis direction, and the convergence effect of water flow then reduces at this time, and the overflow drop point formed is same It is very ideal.The utility model is conceived based on fully understanding to water flow flow behavior, has devised and changes to original structure It is small, but very creative Technological improvement plan.

In conjunction with actual water flow feature, preferably described choose pastes angle inclined-plane 4 as close to 1 side of RightWall on the right side of bank.Such as Fig. 1 institute Show, in this way in low water level operating condition, flow velocity is lower, and water flow is mainly converged at close to 1 side of RightWall, chooses to effectively increase Away from obtaining ideal overflow drop point.In conjunction with the practical flow feature of water flow, horizontal plane where preferably described 1 bottom of RightWall is lower than Horizontal plane where 2 bottom of leftwall.To guarantee that water flow will not fly to overflow when head is higher via leftwall 2.

In general, it is preferred that the leftwall 2 and RightWall 1 are bell-mouth structure of air, thus for the formation of ideal overflow form Support in structure is provided.It is preferred that the bell-mouth structure of air is hatch frame along water (flow) direction.It is excellent in order to reduce the difficulty of construction Select the RightWall 1 vertical with patch angle inclined-plane 4 on the right side of bank is chosen, and preferably the leftwall 2 is vertical with inclined-plane 3 on the left of bank is chosen, To guarantee the smooth flow of water flow.

Claims (7)

1. skew bucket structure, including leftwall (2) and RightWall (1) are chamfer, between the leftwall (2) and RightWall (1) Be provided with and choose bank runner bottom surface structure, it is characterised in that: it is described choose bank runner bottom surface structure by choose on the right side of bank patch angle inclined-plane (4) and It chooses on the left of bank inclined-plane (3) and constitutes.

2. beveling skew bucket structure as described in claim 1, it is characterised in that: bank patch angle inclined-plane (4) of choosing is close RightWall (1) side.

3. beveling skew bucket structure as claimed in claim 2, it is characterised in that: horizontal where RightWall (1) bottom Face is lower than horizontal plane where leftwall (2) bottom.

4. beveling skew bucket structure as claimed in claim 1,2 or 3, it is characterised in that: the leftwall (2) and RightWall It (1) is bell-mouth structure of air.

5. beveling skew bucket structure as claimed in claim 4, it is characterised in that: the bell-mouth structure of air is along water (flow) direction Hatch frame.

6. beveling skew bucket structure as claimed in claim 1,2 or 3, it is characterised in that: the RightWall (1) and choose bank the right side The side inclined-plane Tie Jiao (4) is vertical.

7. beveling skew bucket structure as claimed in claim 1,2 or 3, it is characterised in that: the leftwall (2) and choose bank a left side Skew back face (3) is vertical.