CN212896236U

CN212896236U - Oblique-cutting type outlet flow-straightening bucket

Info

Publication number: CN212896236U
Application number: CN202021624687.3U
Authority: CN
Inventors: 邱勇; 吴锦钢; 王文兵; 周鑫宇; 曾毓莉; 杨泽文; 陈玉斌; 徐嘉
Original assignee: Yunnan Agricultural University
Current assignee: Yunnan Agricultural University
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-04-06
Anticipated expiration: 2030-08-07

Abstract

The utility model belongs to the technical field of hydraulic and hydroelectric engineering trajectory energy dissipation facility's trajectory bucket field and specifically relates to a chamfer type export trajectory bucket, including the changeover portion, the changeover portion includes the plane bottom plate, the upper end edge extension of plane bottom plate has second side wall and first side wall, and first side wall is located the place ahead of second side wall, the side extension of plane bottom plate has the trajectory bucket section, the trajectory bucket section is including extending the curved surface bottom plate in the side of plane bottom plate, the cross sectional shape of curved surface bottom plate is the curved surface of upwards concave, the utility model is suitable for a valley is narrow, and the bank spillway that river bending coefficient is great, or the terrain condition that there is great angle of intersection for the line in spillway axis and the river course, and structural design is simple, can be convenient for satisfy actual engineering needs under special topography, geological conditions.

Description

Oblique-cutting type outlet flow-straightening bucket

Technical Field

The utility model relates to a hydraulic and hydroelectric engineering trajectory energy dissipation facility's trajectory bucket field especially relates to a chamfer type export trajectory bucket.

Background

The flip energy dissipation is widely applied to the water outlet structure of the medium and high-head hydraulic and electric engineering because of the advantages of simple structure, low investment, convenient maintenance and the like, the flip energy dissipation is that a flip bucket is built at the downstream end part of the water outlet structure, the kinetic energy of water flow discharged along a discharge chute is utilized to flip the water flow to the air in a proper way, the flip bucket consumes partial kinetic energy of the water flow under the diffusion action of the flip bucket in the air, and then the energy of the water flow is further consumed through the collision with the downstream water body, so that the safety of the building is protected, the motion track and the shape of the flip bucket are determined by the body shape of the flip bucket, therefore, the selection of the flip bucket has the effect of lifting the flip bucket in the design of the water outlet structure, but the conventional flip bucket has a continuous flip bucket and a differential bucket, but the traditional flip bucket cannot meet the actual engineering requirements under special terrain and geological conditions, the problem that the projecting water flow cannot smoothly enter a river channel due to narrow terrain, overlarge intersection angle between the central axis of a water outlet structure and the downstream river channel and the like is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art and providing a beveling type outlet flip bucket.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a run-on bucket of class is chosen to chamfer type export, includes the changeover portion, the changeover portion includes the plane bottom plate, the upper end edge of plane bottom plate extends there are second side wall and first side wall, and first side wall is located the place ahead of second side wall, the side of plane bottom plate extends there is the run-on bucket section, the run-on bucket section is including extending the curved surface bottom plate in the side of plane bottom plate, the cross sectional shape of curved surface bottom plate is the curved surface of upwards concavity, the upper end of curved surface bottom plate extends has the arc to lead wall and perpendicular plane to lead the wall, and perpendicular plane leads the wall and is located the place ahead that the arc led the wall, the side edge of curved surface bottom plate has seted up the inclined bend delivery port.

Preferably, the width of the plane bottom plate is four meters, and the length of the plane bottom plate is four meters.

Preferably, the length of the curved bottom plate is six meters, and the radius of the curved bottom plate is ten meters.

Preferably, the radius of the arc-shaped guide wall is twelve meters, and the length of the vertical plane guide wall is three meters.

Preferably, the horizontal length of the inclined cut water outlet is three meters, and an included angle between an inclined plane of the inclined cut water outlet and the horizontal plane of the vertical plane guide wall is thirty-six points and seven degrees.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses because the skew cutting effect of the turn-round of arc guide wall and oblique cutting delivery port, make the nose bank by original single angle of shooing of choosing, become along a plurality of angles of shooing that the rivers direction is the gradual increase, the outgoing orbit and the aerial form of shooing rivers have been changed, make the water tongue take place fore-and-aft tensile and plane roll-over aloft, outgoing rivers direct-flushing bank slope has been avoided, the width of entrying has been increased simultaneously, the washing away to the low reaches river course has been reduced, it is narrow to be applicable to the valley, the great bank limit spillway of river bending coefficient, or the relief way axis exists the topographic condition at great angle of intersection with the river course flood line in with the river course, and structural design is simple, can be convenient for at special topography, satisfy actual engineering needs under the geological conditions.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a view from another perspective of the present invention;

fig. 3 is the utility model discloses and the arrangement view of river course.

In the figure: 1. a planar base plate; 2. a first side wall; 3. a second side wall; 4. a vertical plane guide wall; 5. an arc-shaped guide wall; 6. a curved surface base plate; 7. a diagonal cut water outlet.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1-3, the oblique-cut type outlet flip bucket includes a transition section, the transition section includes a planar bottom plate 1, a second side wall 3 and a first side wall 2 extend from an upper end edge of the planar bottom plate 1, the first side wall 2 is located in front of the second side wall 3, a flip bucket section extends from a side surface of the planar bottom plate 1, the flip bucket section includes a curved bottom plate 6 extending from a side surface of the planar bottom plate 1, a cross-sectional shape of the curved bottom plate 6 is an upwardly concave curved surface, an arc guide wall 5 and a vertical plane guide wall 4 extend from an upper end of the curved bottom plate 6, the vertical plane guide wall 4 is located in front of the arc guide wall 5, and an oblique-cut water outlet 7 is formed at a side edge of the curved bottom plate 6.

The width of the plane bottom plate 1 is four meters, the length of the plane bottom plate 1 is four meters, and the width of the plane bottom plate 1 is the same as that of the spillway bottom plate.

The length of the curved surface bottom plate 6 is six meters, the radius of the curved surface bottom plate 6 is ten meters, and the width of the curved surface bottom plate 6 at the flip bucket section is gradually smaller than that of the transition bottom plate plane bottom plate 1 along the water flow direction due to the beveling effect of the vertical plane guide wall 4 and the twisting effect of the arc guide wall 5.

The radius of the arc-shaped guide wall 5 is twelve meters, the length of the vertical plane guide wall 4 is three meters, the arc-shaped guide wall 5 is formed by connecting the right side of the initial end of the flip bucket section with the tail end of the central axis of the spillway, and the arc-shaped guide wall 5 on the right side of the initial end of the flip bucket section is tangent to the second side wall 3 of the transition section.

The horizontal length of the oblique cutting water outlet 7 is three meters, the included angle between the inclined plane of the oblique cutting water outlet 7 and the horizontal plane of the vertical plane guide wall 4 is thirty-six-point seven degrees, and the oblique cutting water outlet 7 is formed by twisting the arc-shaped guide wall 5 on the right side of the flip bucket towards the central axis of the spillway, namely, the oblique cutting water outlet is formed by being in an arc shape on the plane and obliquely cutting the vertical plane guide wall 4 at the middle point of the curved surface bottom plate 6 of the flip bucket section towards the central axis of the spillway.

When in use, the direction of the flip jet water flow is deflected on a plane under the action of the arc guide wall 5, the flip jet water flow falls near a body line in a downstream river channel, the jet flow direct flushing bank slope is effectively avoided, the flip jet water flow is suitable for a bank flood way with narrow river grains and large river bending coefficient, or a topographic condition that a large intersection angle exists between the central axis of the flood way and the body line in the river channel, a right-side emergent water tongue turns leftwards on the plane, the cross section is inverted U-shaped, the longitudinal upward stretching range of the flip jet water tongue is large, the contact area with air is increased, the flip jet water tongue and the air are mixed to form strong collision, the water energy is eliminated to the maximum extent in the air, the flushing of the downstream river bed by the water tongue is reduced, the flip jet angle is changed from the fixed flip angle of the traditional continuous flip jet nasal ridge to a plurality of flip angles which are increased along the water flow direction, and the flip jet angle of the central axis of the end of the flip jet nasal ridge section is maximum, thus, the distance is furthest; the deflecting part of the arc guide wall 5 of the deflecting bucket section, namely the deflecting angle at the tail of the right side of the transition section, is the smallest, so that the deflecting distance is the shortest, but the deflecting angle is the largest, the twist-cut type deflecting bucket can enable water flow to sequentially and continuously deflect leftwards to form a long and narrow water tongue water inlet belt close to a water line in a river channel, the water tongue water inlet belt is distributed in a fan shape on a vertical surface, and the water tongue falls at a position far away from a water discharge building, so that the safety of a dam is protected.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a beveling type export bucket of opting flow, includes the changeover portion, its characterized in that, the changeover portion includes plane bottom plate (1), the upper end edge of plane bottom plate (1) extends and has second side wall (3) and first side wall (2), and first side wall (2) are located the place ahead of second side wall (3), the side of plane bottom plate (1) extends has the bucket of opting flow section, the bucket of opting flow section is including extending curved surface bottom plate (6) in the side of plane bottom plate (1), the cross sectional shape of curved surface bottom plate (6) is the curved surface of upwards concavity, the upper end of curved surface bottom plate (6) extends has arc to lead wall (5) and perpendicular plane to lead wall (4), and perpendicular plane leads wall (4) and is located the place ahead of arc to lead wall (5), the side edge of curved surface bottom plate (6) has seted up oblique chamfer shape delivery port (7).

2. The oblique-cutting outlet flip bucket according to claim 1, wherein the width of the plane bottom plate (1) is four meters, and the length of the plane bottom plate (1) is four meters.

3. The oblique-cutting outlet flip bucket according to claim 1, wherein the length of the curved bottom plate (6) is six meters, and the radius of the curved bottom plate (6) is ten meters.

4. The oblique-cutting outlet flip bucket according to claim 1, wherein the radius of the arc-shaped guide wall (5) is twelve meters, and the length of the vertical plane guide wall (4) is three meters.

5. The oblique-cutting type outlet flip bucket according to claim 1, characterized in that the horizontal length of the oblique-cutting water outlet (7) is three meters, and the included angle between the oblique surface of the oblique-cutting water outlet (7) and the horizontal plane of the vertical plane guide wall (4) is thirty-six and seven degrees.