Novel flip bucket

Abstract

The novel flip bucket comprises a flat bottom plate, a left wall is vertically and fixedly connected to one side of the upper end face of the flat bottom plate, a right wall is vertically and fixedly connected to the other side of the upper end face of the flat bottom plate, the left wall and the right wall are each of an arc-shaped structure in the water flow direction, and the left wall and the right wall guide water flow to the downstream and deflect towards the left wall. The side face, close to the left wall, of the right wall is vertically and fixedly connected with a right differential guide wall on the upper end face of the flat bottom plate, the top of the right differential guide wall is fixedly connected with a right inner twisted face fitting slope, the side face of the right inner twisted face fitting slope is connected with the right wall, and a round chamfer is arranged at the edge formed by connecting the right differential guide wall and the right inner twisted face fitting slope close to the left wall. According to the novel flip bucket, it can be guaranteed that a high slope of a right bank is not scoured, and the problems that when the total water head energy of discharged water flow is not large, the water depth of a front flow channel of the bucket is large, and the Froude number is small, an existing bucket cannot fully lift the water flow to the far downstream for energy dissipation are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic structures, specifically relating to a novel flow-lifting nose sill. Background Technology

[0002] Spillway or flood discharge tunnels are crucial hydraulic structures in water conservancy and hydropower projects for flood discharge. A spillway nose sill dissipates energy by projecting water into the air, utilizing friction between the projected water jet and air, aeration, the impact of the falling water jet and the river flow, and vortices generated in the scour pit. When using spillway energy dissipation, due to geological conditions and other factors, the outlet spillway nose sill is often close to the mountainside or riverbank. For some projects, the overall head energy of the discharged water flow is not high, the water depth in front of the nose sill is large, and the Froude number is low, making it impossible to fully project the water flow to a distant downstream area for energy dissipation. For pumped storage power stations, the spillway tunnel may also serve as a diversion tunnel, resulting in significant flow rate variations. Therefore, for this type of project, the spillway nose sill must ensure that it meets the requirements for safe water discharge and energy dissipation and scour prevention under different flow rates. Utility Model Content

[0003] The purpose of this invention is to provide a novel draft nose sill that solves the problem that existing nose sills cannot adequately lift water flow to a distant downstream area for energy dissipation when the draft nose sill at the outlet of a spillway or other water discharge structure is close to the mountain or riverbank, the overall head energy of the downstream flow is not large, the water depth in front of the nose sill is large, and the Froude number is small.

[0004] The technical solution adopted by this utility model is a novel flow-lifting nose sill, including a flat bottom plate. A left wall is vertically fixed to one side of the upper surface of the flat bottom plate, and a right wall is vertically fixed to the other side of the upper surface of the flat bottom plate. Both the left and right walls are designed with an arc shape along the water flow direction. The left and right walls guide the water flow downstream and deflect it towards the left wall. A right differential guide wall is vertically fixed to the upper surface of the flat bottom plate on the side of the right wall near the left wall. A right inner twisted slope is fixed to the top of the right differential guide wall. The side of the right inner twisted slope is connected to the right wall. The edge formed by the right differential guide wall and the right inner twisted slope near the left wall is provided with a rounded chamfer.

[0005] The features of this utility model also include:

[0006] The beginning of the flat bottom plate is connected to the end of the drain channel, and the end of the water outlet of the flat bottom plate is designed with an arc-shaped structure.

[0007] The right differential guide wall is tangent to the right wall at the water inlet. The right differential guide wall extends in an arc shape along the water flow direction to the water outlet. The arc section of the right differential guide wall near the water outlet coincides with the arc section at the end of the water outlet of the flat bottom plate 1.

[0008] The length of the arc-shaped section of the right-side differential guide wall near the water outlet is:L1 The length of the arc-shaped section at the end of the flat bottom plate water outlet is L2 , L1 Less than 0.3 L2 .

[0009] The height of the left wall is H1 The height of the right wall is H3 The height of the differential guide wall on the right is H2 , H3 Greater than H1 , H1 Located at 0.7 H3 Up to 0.8 H3 between, H2 Located at 0.5 H1 Up to 0.6 H1 between.

[0010] The thickness of the differential guide wall on the right is B2 The width of the flow channel between the right differential guide wall and the left wall is B1 , B2 The radius of the differential guide wall on the right side gradually increases from the water inlet to the outlet. R4 , B2 by R4 control ，B1 The flow gradually decreases from the inlet to the outlet. B2 No more than 0.5 B1 .

[0011] The right inner twist slope section is a right-angled triangle. The width of the right inner twist slope gradually decreases from low to high along the right side wall. The angle formed between the right inner twist slope and the horizontal direction is... a The right inner twist surface is attached to the highest point of the slope at an angle. a control, a Between 15° and 45°.

[0012] The radius of the chamfer is R6 , R6 The water flow gradually increases in size from the inlet to the outlet. R6 Not greater than 0.1 B2 .

[0013] The beneficial effects of this utility model are:

[0014] This invention provides a novel spillway nose sill that utilizes the inner guide wall on the right side to direct most of the water flow to the left bank. This effectively avoids severe scouring of the high slope on the right bank caused by the main flow being flush against the right bank wall due to the influence of the bend circulation. At low to medium flow rates, the flow is diverted through the left channel of the inner guide wall on the right side, diverting the discharged floodwater away from the high slope on the right bank, resulting in weak backflow on the right bank. When the flow rate is large, the flow is diverted simultaneously through the left channel and the right twisted slope. Due to the significant increase in surface variation, the water tongue becomes thinner, and the water flow at the right twisted slope effectively counteracts the backflow caused by the floodwater discharged from the left channel, ensuring that the high slope on the right bank is not severely scourted or affected by large backflow. This nose sill has a flat bottom plate for discharge, making it particularly suitable for spillway structures in water conservancy projects with high sediment content. Its simple shape facilitates construction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the novel nasal flap of this utility model;

[0016] Figure 2 This is a plan view of the present invention;

[0017] Figure 3 This is a side view of the present invention;

[0018] Figure 4 yes Figure 2 AA section view.

[0019] In the diagram, 1. Flat bottom plate, 2. Left wall, 3. Right wall, 4. Right differential guide wall, 5. Right inner twisted slope, 6. Rounded chamfer. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] The novel nasal flap provided by this utility model, such as Figure 1As shown, the system includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream, deflecting it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twisted slope 5 is fixed to the top of the right differential guide wall 4. The side of the right inner twisted slope 5 is connected to the right wall 3 to ensure the right inner... To ensure smooth flow on the twisted slope 5, the right differential guide wall 4 and the right inner twisted slope 5, near the left wall 2, form a rounded chamfer 6 at their joint. The beginning of the flat bottom plate 1 connects to the end of the drain channel, and the end of the flat bottom plate 1 at the water outlet is designed with an arc shape to enhance the planar diffusion of the water flow. The right differential guide wall 4 is tangent to the right wall 3 at the water inlet, and extends along the water flow direction with an arc shape to the water outlet. The arc section of the right differential guide wall 4 near the water outlet coincides with the arc section at the end of the flat bottom plate 1 at the water outlet. Figure 2 As shown, the length of the arc-shaped section of the right-side differential guide wall 4 near the water outlet is... L1 The length of the arc-shaped section at the end of the water outlet of the flat bottom plate 1 is L2 , L1 Less than 0.3 L2 .like Figure 3 As shown, the height of the left wall 2 is H1 The height of the right wall is 3. H3 The height of the right-side differential guide wall 4 is H2 Due to the influence of circulation and the need for drainage by sloping the right inner torsion surface, H3 Greater than H1 , H1 Located at 0.7 H3 Up to 0.8 H3 between, H2 Located at 0.5 H1 Up to 0.6 H1 Between, the height of the right differential guide wall 4 H2 Then it is the smallest. For example... Figure 4 As shown, the thickness of the differential guide wall 4 on the right is... B2 The width of the flow channel between the right differential guide wall 4 and the left wall 2 is B1 , B2 The radius of the differential guide wall 4 on the right side gradually increases from the water inlet to the outlet. R4 , B2 by R4 control ，B1 The flow gradually decreases from the inlet to the outlet. B2 No more than 0.5 B1The right inner twisted slope 5 has a right-angled triangular shape. The width of the right inner twisted slope 5 gradually decreases from low to high along the right wall 3. The angle formed between the slope of the right inner twisted slope 5 and the horizontal direction is... a The highest point of the right inner twist surface is at an angle of 5. a control, a Between 15° and 45°; the radius of the rounded chamfer is 6. R6 , R6 The water flow gradually increases in size from the inlet to the outlet. R6 Not greater than 0.1 B2 .

[0022] Example 1

[0023] The novel nasal flap proposed in this embodiment, such as Figure 1 As shown, it includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream and deflect it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twisted slope 5 is fixed to the top of the right differential guide wall 4. The side of the right inner twisted slope 5 is connected to the right wall 3. A rounded chamfer 6 is provided at the edge formed by the right differential guide wall 4 and the right inner twisted slope 5 near the left wall 2.

[0024] Example 2

[0025] The novel nasal flap proposed in this embodiment, such as Figure 1 As shown, it includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream and deflect it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twisted slope 5 is fixed to the top of the right differential guide wall 4. The side of the right inner twisted slope 5 is connected to the right wall 3. The edge formed by the right differential guide wall 4 and the right inner twisted slope 5 near the left wall 2 is provided with a rounded chamfer 6. The beginning of the flat bottom plate 1 is connected to the end of the drain channel, and the end of the water outlet of the flat bottom plate 1 is designed as an arc-shaped structure.

[0026] Example 3

[0027] The novel nasal flap proposed in this embodiment, such as Figure 1As shown, the system includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream, deflecting it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twist slope 5 is fixed to the top of the right differential guide wall 4. The side wall is connected to the right wall 3. The right differential guide wall 4 and the right inner twisted slope 5 are connected to the edge formed by the left wall 2 and are provided with a rounded chamfer 6. The beginning of the flat bottom plate 1 is connected to the end of the drain channel. The end of the flat bottom plate 1 at the water outlet is set with an arc structure. The right differential guide wall 4 is tangent to the right wall 3 at the water inlet. The right differential guide wall 4 extends to the water outlet in an arc structure along the water flow direction. The arc section of the right differential guide wall 4 near the water outlet coincides with the arc section at the end of the flat bottom plate 1 at the water outlet.

[0028] Example 4

[0029] The novel nasal flap proposed in this embodiment, such as Figure 1 As shown, the system includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream, deflecting it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twist slope 5 is fixed to the top of the right differential guide wall 4. The side wall connects to the right wall 3. The right differential guide wall 4 and the right inner twisted slope 5, near the left wall 2, form an edge with a rounded chamfer 6. The beginning of the flat bottom plate 1 connects to the end of the drain channel, and the end of the flat bottom plate 1 at the water outlet is designed with an arc-shaped structure. The right differential guide wall 4 is tangent to the right wall 3 at the water inlet. The right differential guide wall 4 extends along the water flow direction in an arc-shaped structure to the water outlet. The arc-shaped section of the right differential guide wall 4 near the water outlet coincides with the arc-shaped section at the end of the flat bottom plate 1 at the water outlet. Figure 2 As shown, the length of the arc-shaped section of the right-side differential guide wall 4 near the water outlet is... L1 The length of the arc-shaped section at the end of the water outlet of the flat bottom plate 1 is L2 , L1 Less than 0.3 L2 .

[0030] Example 5

[0031] The novel nasal flap proposed in this embodiment, such as Figure 1As shown, the system includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream, deflecting it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twist slope 5 is fixed to the top of the right differential guide wall 4. The side wall connects to the right wall 3. The right differential guide wall 4 and the right inner twisted slope 5, near the left wall 2, form an edge with a rounded chamfer 6. The beginning of the flat bottom plate 1 connects to the end of the drain channel, and the end of the flat bottom plate 1 at the water outlet is designed with an arc-shaped structure. The right differential guide wall 4 is tangent to the right wall 3 at the water inlet. The right differential guide wall 4 extends along the water flow direction in an arc-shaped structure to the water outlet. The arc-shaped section of the right differential guide wall 4 near the water outlet coincides with the arc-shaped section at the end of the flat bottom plate 1 at the water outlet. Figure 2 As shown, the length of the arc-shaped section of the right-side differential guide wall 4 near the water outlet is... L1 The length of the arc-shaped section at the end of the water outlet of the flat bottom plate 1 is L2 , L1 Less than 0.3 L2 .like Figure 3 As shown, the height of the left wall 2 is H1 The height of the right wall is 3. H3 The height of the right-side differential guide wall 4 is H2 , H3 Greater than H1 , H1 Located at 0.7 H3 Up to 0.8 H3 between, H2 Located at 0.5 H1 Up to 0.6 H1 between.

[0032] Example 6

[0033] The novel nasal flap proposed in this embodiment, such as Figure 1As shown, the system includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream, deflecting it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twist slope 5 is fixed to the top of the right differential guide wall 4. The side wall connects to the right wall 3. The right differential guide wall 4 and the right inner twisted slope 5, near the left wall 2, form an edge with a rounded chamfer 6. The beginning of the flat bottom plate 1 connects to the end of the drain channel, and the end of the flat bottom plate 1 at the water outlet is designed with an arc-shaped structure. The right differential guide wall 4 is tangent to the right wall 3 at the water inlet. The right differential guide wall 4 extends along the water flow direction in an arc-shaped structure to the water outlet. The arc-shaped section of the right differential guide wall 4 near the water outlet coincides with the arc-shaped section at the end of the flat bottom plate 1 at the water outlet. Figure 2 As shown, the length of the arc-shaped section of the right-side differential guide wall 4 near the water outlet is... L1 The length of the arc-shaped section at the end of the water outlet of the flat bottom plate 1 is L2 , L1 Less than 0.3 L2 .like Figure 3 As shown, the height of the left wall 2 is H1 The height of the right wall is 3. H3 The height of the right-side differential guide wall 4 is H2 , H3 Greater than H1 , H1 Located at 0.7 H3 Up to 0.8 H3 between, H2 Located at 0.5 H1 Up to 0.6 H1 Between. For example Figure 4 As shown, the thickness of the differential guide wall 4 on the right is... B2 The width of the flow channel between the right differential guide wall 4 and the left wall 2 is B1 , B2 The radius of the differential guide wall 4 on the right side gradually increases from the water inlet to the outlet. R4 , B2 by R4 control ，B1 The flow gradually decreases from the inlet to the outlet. B2 No more than 0.5 B1 The right inner twisted slope 5 has a right-angled triangular shape. The width of the right inner twisted slope 5 gradually decreases from low to high along the right wall 3. The angle formed between the slope of the right inner twisted slope 5 and the horizontal direction is... a The highest point of the right inner twist surface is at an angle of 5. a control, aBetween 15° and 45°.

[0034] Example 7

[0035] The novel nasal flap proposed in this embodiment, such as Figure 1 As shown, the system includes a flat bottom plate 1. A left wall 2 is vertically fixed to one side of the upper surface of the flat bottom plate 1, and a right wall 3 is vertically fixed to the other side of the upper surface of the flat bottom plate 1. Both the left wall 2 and the right wall 3 are designed as arc-shaped structures along the water flow direction. The left wall 2 and the right wall 3 guide the water flow downstream, deflecting it towards the left wall 2. A right differential guide wall 4 is vertically fixed to the side of the right wall 3 near the left wall 2 on the upper surface of the flat bottom plate 1. A right inner twist slope 5 is fixed to the top of the right differential guide wall 4. The side wall connects to the right wall 3. The right differential guide wall 4 and the right inner twisted slope 5, near the left wall 2, form an edge with a rounded chamfer 6. The beginning of the flat bottom plate 1 connects to the end of the drain channel, and the end of the flat bottom plate 1 at the water outlet is designed with an arc-shaped structure. The right differential guide wall 4 is tangent to the right wall 3 at the water inlet. The right differential guide wall 4 extends along the water flow direction in an arc-shaped structure to the water outlet. The arc-shaped section of the right differential guide wall 4 near the water outlet coincides with the arc-shaped section at the end of the flat bottom plate 1 at the water outlet. Figure 2 As shown, the length of the arc-shaped section of the right-side differential guide wall 4 near the water outlet is... L1 The length of the arc-shaped section at the end of the water outlet of the flat bottom plate 1 is L2 , L1 Less than 0.3 L2 .like Figure 3 As shown, the height of the left wall 2 is H1 The height of the right wall is 3. H3 The height of the right-side differential guide wall 4 is H2 , H3 Greater than H1 , H1 Located at 0.7 H3 Up to 0.8 H3 between, H2 Located at 0.5 H1 Up to 0.6 H1 Between. For example Figure 4 As shown, the thickness of the differential guide wall 4 on the right is... B2 The width of the flow channel between the right differential guide wall 4 and the left wall 2 is B1 , B2 The radius of the differential guide wall 4 on the right side gradually increases from the water inlet to the outlet. R4 , B2 by R4 control ，B1 The flow gradually decreases from the inlet to the outlet. B2 No more than 0.5 B1The right inner twisted slope 5 has a right-angled triangular shape. The width of the right inner twisted slope 5 gradually decreases from low to high along the right wall 3. The angle formed between the slope of the right inner twisted slope 5 and the horizontal direction is... a The highest point of the right inner twist surface is at an angle of 5. a control, a Between 15° and 45°; the radius of the rounded chamfer is 6. R6 , R6 The water flow gradually increases in size from the inlet to the outlet. R6 Not greater than 0.1 B2 .

Claims

1. A novel nasal bridge with a flow-inducing function, characterized in that, Includes a flat bottom plate (1), a left wall (2) is vertically fixed to one side of the upper end face of the flat bottom plate (1), and a right wall (3) is vertically fixed to the other side of the upper end face of the flat bottom plate (1). The left wall (2) and the right wall (3) are both set as arc structures along the water flow direction. The left wall (2) and the right wall (3) guide the water flow downstream and deviate towards the left wall (2). The side of the right wall (3) near the left wall (2) is vertically fixed to the upper end face of the flat bottom plate (1) with a right differential guide wall (4). The top of the right differential guide wall (4) is fixed with a right inner twist surface slope (5). The side of the right inner twist surface slope (5) is connected to the right wall (3). The edge formed by the right differential guide wall (4) and the right inner twist surface slope (5) near the left wall (2) is provided with a rounded chamfer (6).

2. The novel nasal flap according to claim 1, characterized in that, The beginning of the flat bottom plate (1) is connected to the end of the drain trough, and the end of the water outlet of the flat bottom plate (1) is set as an arc structure.

3. The novel nasal flap according to claim 1, characterized in that, The right differential guide wall (4) is tangent to the right wall (3) at the water inlet. The right differential guide wall (4) extends to the water outlet in an arc shape along the water flow direction. The arc-shaped section of the right differential guide wall (4) near the water outlet coincides with the arc-shaped section at the end of the water outlet of the flat bottom plate (1).

4. The novel nasal flap according to claim 1, characterized in that, The length of the arc-shaped section of the right-side differential guide wall (4) near the water outlet is... L1 The length of the arc-shaped section at the water outlet of the flat bottom plate (1) is... L2 The L1 Less than 0.3 L2 .

5. The novel nasal flap according to claim 1, characterized in that, The height of the left wall (2) is H1 The height of the right wall (3) is H3 The height of the right differential guide wall (4) is H2 The H3 Greater than H1 The H1 Located at 0.7 H3 Up to 0.8 H3 Between, the H2 Located at 0.5 H1 Up to 0.6 H1 between.

6. The novel nasal flap according to claim 1, characterized in that, The thickness of the right-side differential guide wall (4) is B2 The width of the flow channel between the right differential guide wall (4) and the left wall (2) is B1 The B2 The radius of the right-side differential guide wall (4) gradually increases from the water inlet to the outlet. R4 The B2 by R4 control ， The B1 The water flow gradually decreases in size from the inlet to the outlet. B2 No more than 0.5 B1 .

7. The novel nasal flap according to claim 1, characterized in that, The cross-section of the right inner twisted slope (5) is a right-angled triangle. The width of the right inner twisted slope (5) gradually decreases from low to high along the right side wall (3). The angle formed between the slope surface of the right inner twisted slope (5) and the horizontal direction is... a The highest point of the right inner twist surface slope (5) is at an angle a Control, the a Between 15° and 45°.

8. The novel nasal flap according to claim 1, characterized in that, The radius of the rounded chamfer (6) is R6 The R6 The water flow gradually increases in size from the inlet to the outlet. R6 Not greater than 0.1 B2 .

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