Tail water tank structure of horizontal water turbine base

Abstract

The invention discloses a horizontal water turbine base tail water tank structure, and belongs to the field of hydroelectric generation. Comprising a base tail water tank, a water discharging tank is arranged in the base tail water tank, a notch is formed in the top of the water discharging tank, and the bottom of a turbine runner can extend into the water discharging tank from the notch; the water drainage plate is arranged on the inner wall of the base tail water tank and located below the notch, and a U-shaped notch used for allowing a rotating wheel of the water turbine to pass through is formed in the water drainage plate. Compared with the prior art, the water discharging plate and the evacuation discharging motor are arranged in the tail water tank of the base, residual water flow on the rotating wheel can be discharged, resistance of the water flow to rotation of the rotating wheel is avoided, and therefore the power generation efficiency of the rotating wheel can be improved.

Description

Technical Field

[0001] This invention belongs to the field of hydropower generation, and specifically relates to a tailrace structure for a horizontal turbine base. Background Technology

[0002] Currently, the more traditional power generation methods in society usually include thermal power generation, hydropower generation, wind power generation, photovoltaic power generation, nuclear power, etc. Among them, hydropower generation is widely used due to its advantages such as low cost, large power generation, and no environmental pollution.

[0003] The water turbine is the core equipment in hydroelectric power generation. Traditional water turbines typically include reaction turbines and impulse turbines. Reaction turbines include mixed-flow, axial-flow, oblique-flow, and through-flow types, while impulse turbines include bucket turbine, oblique-impact, and double-impact types. In current technology, both impulse and reaction turbines generate electricity by jetting water, using the energy of the water flow to drive the turbine runner and thus the generator.

[0004] Reaction turbines and impulse turbines are classified as horizontal or vertical depending on the main shaft configuration. For horizontal turbines, since the main shaft is horizontally positioned and the runner is vertically positioned, the runner rotates along with the water flow. Most of the water flow will be discharged into the tank by gravity when it reaches the bottom of the runner, but a small portion of the water flow will continue to rotate upwards with the runner, which will increase the resistance to the rotation of the runner and thus affect the power generation efficiency of the runner. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a horizontal turbine base tailrace structure that can drain residual water from the turbine runner, preventing the water flow from causing resistance to the runner's rotation, thereby improving the runner's power generation efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] This invention provides a tailrace tank structure for a horizontal turbine base, comprising:

[0008] The base tailwater trough has a water discharge trough inside, and the top of the water discharge trough has an opening, through which the bottom of the turbine runner can extend into the water discharge trough.

[0009] A drain plate is provided on the inner wall of the tailwater trough of the base and located below the trough opening. The drain plate has a U-shaped trough for the turbine runner to pass through.

[0010] Furthermore, the distance between the drain plate and the nearest end of the base tailwater trough is one-quarter of the total length of the base tailwater trough.

[0011] Furthermore, the drainage plate is inclined, and its inclination angle is 40-60 degrees.

[0012] Furthermore, a drain base plate connected to the drain plate is also provided on the inner wall of the base tailwater trough. A drain trough is formed between the drain plate, the drain base plate and the inner wall of the base tailwater trough. A through hole is opened on the side plate of the base tailwater trough, and a drain pipe is installed on the through hole. One end of the drain pipe extends into the drain trough and the other end extends out of the base tailwater trough. A vacuum drain motor is also provided in the drain pipe, and motor blades are connected to the vacuum drain motor.

[0013] Furthermore, the end of the drain pipe opposite to the drain plate is also equipped with a drain port flange, through which a drain pipe is connected to discharge the pumped water into the water tank.

[0014] In this application, when the turbine runner rotates under the impact of water flow, it carries the water flow with it. 60% of the water will be discharged directly into the unloading tank when it reaches the bottom. The remaining 40% of the water will continue to rotate under the drive of the runner and impact the spillway plate. The spillway plate will block 30% of the water and allow it to enter the unloading tank. The remaining 10% of the water will continue to rotate with the runner. When it reaches the position of the drain trough, a vacuum pump is used to create a vacuum. The vacuum pump is intelligently controlled and starts synchronously with the turbine to discharge the remaining 10% of the water flow through the drain pipe. A vacuum is formed inside the runner, which prevents the residual water flow from creating resistance to the rotation of the runner, thereby improving the power generation efficiency of the runner.

[0015] The beneficial effects of this invention are as follows: Compared with the prior art, this application can discharge the residual water on the impeller by setting a water discharge plate and a vacuum pumping motor in the tailwater tank of the base, thereby avoiding the water flow from causing resistance to the rotation of the impeller and thus improving the power generation efficiency of the impeller. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the tailrace channel structure of a horizontal turbine base.

[0017] Figure 2 This is a cross-sectional view of the tailrace structure of a horizontal turbine base.

[0018] In the diagram: 1. Base tailwater trough; 2. Unloading trough; 3. Groove opening; 4. Drain plate; 5. U-shaped groove; 6. Drain bottom plate; 7. Drain and empty trough; 8. Through hole; 9. Drain pipe; 10. Vacuum and discharge motor; 11. Motor blades; 12. Drain port flange. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To achieve the above objectives, the technical solution of the present invention is as follows:

[0021] See Figure 1-2 As shown, this embodiment provides a horizontal turbine base tailrace tank structure, including:

[0022] The base tailwater trough 1 has a water discharge trough 2 inside. The top of the water discharge trough 2 is provided with a slot 3, and the bottom of the turbine runner can extend into the water discharge trough 2 through the slot 3.

[0023] Drainage plate 4 is disposed on the inner wall of the tailwater trough 1 of the base and located below the trough opening 3. The drainage plate 4 has a U-shaped trough 5 for the turbine runner to pass through.

[0024] In this application, the U-shaped slot 5 is adapted to the turbine runner and is only allowed to pass through the turbine runner, so that the drain plate 4 can block the water flow around the runner and realize the water discharge function.

[0025] Furthermore, the length of the drain plate 4 from the nearest end of the base tailwater trough 1 is one-quarter of the total length of the base tailwater trough 1.

[0026] Furthermore, the drainage plate 4 is inclined, and its inclination angle is 40-60 degrees.

[0027] Furthermore, a drain base plate 6 connected to the drain plate 4 is also provided on the inner wall of the base tailwater trough 1. A drain trough 7 is formed between the drain plate 4, the drain base plate 6 and the inner wall of the base tailwater trough 1. A through hole 8 is provided on the side plate of the base tailwater trough 1. A drain pipe 9 is installed on the through hole 8. One end of the drain pipe 9 extends into the drain trough 7 and the other end extends out of the base tailwater trough 1. A vacuum drain motor 10 is also provided in the drain pipe 9. A motor blade 11 is connected to the vacuum drain motor 10.

[0028] Furthermore, the end of the drain pipe 9 opposite to the drain plate 4 is also equipped with a drain port flange 12, through which a drain pipe is connected to the drain port flange 12 to discharge the pumped water into the water tank.

[0029] Furthermore, the front of the base tailwater trough is gantry-shaped, and the top surface is concave.

[0030] In this application, during the assembly of the horizontal turbine runner, its bottom passes through the slot and enters the unloading tank. Since the spray nozzle is usually located on the side of the runner, it impacts the runner from above, and the kinetic energy of the water flow drives the runner to rotate. As the turbine rotates, it carries water along with it. 60% of the water flows directly into the discharge tank 2 when it reaches the bottom. The remaining 40% of the water continues to rotate due to inertia and impacts the discharge plate 4, which intercepts 30% of the water, allowing it to enter the discharge tank 2. The remaining 10% of the water continues to rotate with the turbine. When it reaches the discharge trough 7, a vacuum is created by the vacuum pump motor 10. The vacuum pump motor 10 is intelligently controlled and starts synchronously with the turbine, discharging the remaining 10% of the water through the discharge pipe 9. This creates a vacuum inside the turbine. Through these settings, the water that has been used up can be completely discharged from the turbine, preventing residual water from creating resistance to the turbine's rotation and thus improving the turbine's power generation efficiency.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tailrace tank structure for a horizontal turbine base, characterized in that, include: The base tailwater trough has a water discharge trough inside, and the top of the water discharge trough has an opening, through which the bottom of the turbine runner can extend into the water discharge trough. A drain plate is provided on the inner wall of the tailwater trough of the base and located below the trough opening. The drain plate has a U-shaped trough for the turbine runner to pass through.

2. The tailrace tank structure of the horizontal turbine base as described in claim 1, characterized in that, The distance between the drain plate and the nearest end of the base tailwater trough is one-quarter of the total length of the base tailwater trough.

3. The tailrace tank structure of the horizontal turbine base as described in claim 1, characterized in that, The drainage plate is inclined, and its inclination angle is 40-60 degrees.

4. The tailrace tank structure of the horizontal turbine base as described in claim 1, characterized in that, The inner wall of the tailwater trough of the base is also provided with a drain bottom plate connected to the drain plate. The drain plate, the drain bottom plate and the inner wall of the tailwater trough of the base form a drain and empty trough. A through hole is opened on the side plate of the tailwater trough of the base. A drain pipe is installed on the through hole. One end of the drain pipe extends into the drain and empty trough of the base and the other end extends out of the tailwater trough of the base. A vacuum drain motor is also provided in the drain pipe. Motor blades are connected to the vacuum drain motor.

5. The tailrace tank structure of the horizontal turbine base as described in claim 4, characterized in that, The end of the drain pipe opposite to the drain plate is also equipped with a drain port flange.

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