Water diversion assisting method for water turbine

Abstract

Provided is a water turbine diversion assisting method. Sediment doped in water flow impacts the surface of a water turbine at an extremely high speed, so that the service life of the water turbine is shortened, vibration is increased, and the energy utilization rate becomes low. The method comprises the following steps that along with continuous inflow of water, the water level of the bottom of an outer barrel gradually rises, the inflow water continues to settle till the water level is higher than the height of an inner barrel, and the upper water enters the inner barrel and flows into a flow guide groove from the inner barrel; the grit chamber can prevent mud and sand in water from directly entering the diversion trench to impact the water turbine and cause surface damage of the water turbine, so that the service life of the water turbine is prolonged, and the working efficiency of the water turbine after abrasion is reduced is also improved; the shielding cover is arranged between the inner cylinder and the outer cylinder, equivalently, a communicating vessel is added, and water is stored and silt in water is settled according to the principle of the communicating vessel. The device is used for water diversion assistance of the water turbine.

Description

Technical Field

[0001] The invention relates to a water turbine water diversion auxiliary method. Background Art

[0002] The basic principle of hydroelectric power generation is to use the water level difference and cooperate with the water turbine generator to generate electricity, that is, to convert the potential energy of water into the mechanical energy of the water wheel, and then use the mechanical energy to drive the generator to obtain electricity. Scientists use the natural condition of the water level difference, effectively utilize fluid engineering and mechanical physics, and carefully combine them to achieve the highest power generation, providing people with cheap and pollution-free electricity.

[0003] Water turbines are important hydropower equipment and an indispensable part of the hydropower industry. Under the action of gravity, the water flows very fast, and the mud and sand mixed in the water will impact the surface of the water turbine at a very high speed, resulting in a reduced service life of the water turbine, increased vibration, and lower energy utilization. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing water turbine will be impacted by the mud mixed in the water flow, resulting in a shortened service life and increased vibration, and to provide a water turbine water diversion auxiliary method that can block the mud and settle the mud.

[0005] The above purpose is achieved through the following technical solutions: A method for assisting water diversion of a hydraulic turbine, the method comprising the following steps: (1) The setting of the sand settling tank allows the water to filter the debris and mud in the water through the sand filter plate to prevent the mud and sand from entering the outer tube. After the water flows into the outer tube through the diversion function of the shielding cover, the water that flows into the outer tube settles at the bottom of the outer tube; (2) As water continues to flow in, the water level at the bottom of the outer tube gradually rises, and the inflowing water continues to settle until the water level is higher than the height of the inner tube. The water at the top enters the inner tube and flows from the inner tube into the diversion groove; (3) The sand settling tank can prevent the mud and sand in the water from directly entering the diversion trough and impacting the turbine, causing surface damage to the turbine, thus extending the service life of the turbine. The working efficiency of the turbine will also be improved after the wear is reduced; (4) A shielding cover is set between the inner tube and the outer tube, which is equivalent to adding a communicating vessel. The principle of the communicating vessel is used to store water and settle mud and sand in the water.

[0006] The invention discloses a water turbine water diversion auxiliary method, wherein the sand settling tank comprises an inner cylinder and an outer cylinder which are arranged concentrically, the upper part of the outer cylinder is fixedly connected to a sand filter plate, the interior of the inner cylinder is fixedly connected to a shielding cover via a support plate, the shielding cover is a conical cylinder, and sand outlet pipes are respectively arranged on both sides between the inner cylinder and the outer cylinder.

[0007] In the water turbine water diversion auxiliary method, the distance between the lower part of the shielding cover and the bottom end of the inner part of the outer cylinder is half the height of the inner cylinder. Beneficial Effects

[0008] 1. The present invention is provided with a sand filter plate, which can prevent debris and mud and sand in the water from entering the inner part of the outer cylinder and block them outside the outer cylinder. Since the sand filter plate is an arc-shaped structure, the mud and sand will roll down from the sand filter plate without accumulation and will not affect the circulation of water.

[0009] 2. The present invention provides a structure in which an inner cylinder and an outer cylinder cooperate with each other, and a shielding cover is provided at the same time, so that the water entering the outer cylinder can fall to the bottom of the outer cylinder under the action of the shielding cover, and then settle at the bottom. After the settlement is completed, the water in the upper part continues to flow in, so that the water after the settlement is completed enters the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a schematic diagram of the structure of the present invention; In the figure: 1. Sand filter plate; 2. Sand settling tank; 3. Outer cylinder; 4. Sand outlet pipe; 5. Shielding cover; 6. Support plate; 7. Inner cylinder; 8. Water lock valve; 9. Diversion trough; 11. Water inlet of water diversion chamber; 12. Turbine; 13. Volute water diversion chamber; 14. Water outlet of water diversion chamber. DETAILED DESCRIPTION

[0011] Reference Figure 1 , a water turbine water diversion auxiliary method, the method comprising the following steps: (1) The setting of the sand settling tank allows the water to filter the debris and mud in the water through the sand filter plate to prevent the mud and sand from entering the outer tube. After the water flows into the outer tube through the diversion function of the shielding cover, the water that flows into the outer tube settles at the bottom of the outer tube; (2) As water continues to flow in, the water level at the bottom of the outer tube gradually rises, and the inflowing water continues to settle until the water level is higher than the height of the inner tube. The water at the top enters the inner tube and flows from the inner tube into the diversion groove; (3) The sand settling tank can prevent the mud and sand in the water from directly entering the diversion trough and impacting the turbine, causing surface damage to the turbine, thus extending the service life of the turbine. The working efficiency of the turbine will also be improved after the wear is reduced; (4) A shielding cover is set between the inner tube and the outer tube, which is equivalent to adding a communicating vessel. The principle of the communicating vessel is used to store water and settle mud and sand in the water.

[0012] A method for assisting water diversion of a water turbine, comprising: a sand settling tank 2, wherein the sand settling tank comprises an inner cylinder 7 and an outer cylinder 3 arranged concentrically, wherein both the inner cylinder and the outer cylinder are cylindrical cylinders, so that the pressure they are subjected to in water is uniform everywhere, the lower part of the inner cylinder is conical, the upper part of the outer cylinder is fixedly connected to a sand filter plate 1, the sand filter plate can be embedded in a groove on the upper part of the outer cylinder, and can be integrally crimped or welded, the interior of the inner cylinder is fixedly connected to a shielding cover 5 through a support plate 6, the support plate is an intermediate cylinder, and the side of the cylinder has four ribs, the four ribs are welded to the interior of the inner cylinder, the upper part of the cylinder is welded to the interior of the shielding cover, the shielding cover is a conical cylinder, and sand outlets are respectively arranged on both sides between the inner cylinder and the outer cylinder. Tube 4, the setting of the sand outlet pipe can facilitate sand discharge, and the setting of the sand settling cylinder allows water to filter the debris and mud in the water through the sand filter plate to prevent the mud and sand from entering the outer cylinder. After the diversion effect of the shielding cover, the water flowing into the outer cylinder is settled at the bottom of the outer cylinder. As the water continues to flow in, the water level at the bottom of the outer cylinder gradually rises, and the inflowing water continues to settle until the water level is higher than the height of the inner cylinder. The upper water enters the inner cylinder and flows from the inner cylinder into the diversion groove. The diversion groove is arranged vertically. The sand settling tank can prevent the mud and sand in the water from directly entering the diversion groove to impact the turbine, causing surface damage to the turbine, extending the service life of the turbine, and the working efficiency of the turbine after the wear is reduced will also be improved.

[0013] A water lock valve is installed on the diversion trough. When it is necessary to overhaul the turbine or clean up the debris in the sand settling tank, close the water lock valve to complete the overhaul. The other end of the guide groove is connected to the volute water diversion chamber 13. The volute water diversion chamber 3 includes a water diversion chamber water inlet 11, a water diversion chamber water outlet 14 and a turbine 12. The turbine is used for power generation. The water flow through the volute water diversion chamber can be evenly distributed around the turbine and enter the turbine axially symmetrically. The inner cross-section of the volute water diversion chamber is circular, which can save steel and withstand a large water pressure. The diameter of the volute water diversion chamber decreases in a gradient along the flow direction of water, forming a turbine shape. The water inlet and the water outlet of the water diversion chamber are respectively located at the two ends of the volute water diversion chamber. The central axis of the water inlet of the water diversion chamber and the central axis of the water outlet of the water diversion chamber form an angle of 90 degrees. The water inlet of the water diversion chamber is fixedly connected to one end of the guide groove, and a turbine is installed on the inner side of the water outlet 32 ​​of the water diversion chamber.

[0014] The distance between the lower part of the shielding cover and the bottom end of the outer cylinder is half the height of the inner cylinder. The shielding cover is arranged between the inner cylinder and the outer cylinder, which is equivalent to adding a communicating vessel, and the principle of the communicating vessel is used to store water and settle mud and sand in the water.

Claims

1. A method for assisting water diversion of a hydraulic turbine, characterized in that: The method comprises the following steps: (1) The setting of the sand settling tank allows the water to filter the debris and mud in the water through the sand filter plate to prevent the mud and sand from entering the outer tube. After the water flows into the outer tube through the diversion function of the shielding cover, the water that flows into the outer tube settles at the bottom of the outer tube; (2) As water continues to flow in, the water level at the bottom of the outer tube gradually rises, and the inflowing water continues to settle until the water level is higher than the height of the inner tube. The water at the top enters the inner tube and flows from the inner tube into the diversion groove; (3) The sand settling tank can prevent the mud and sand in the water from directly entering the diversion trough and impacting the turbine, causing surface damage to the turbine, thus extending the service life of the turbine. The working efficiency of the turbine will also be improved after the wear is reduced; (4) A shielding cover is set between the inner tube and the outer tube, which is equivalent to adding a communicating vessel. The principle of the communicating vessel is used to store water and settle mud and sand in the water.

2. A water turbine water diversion auxiliary method according to claim 1, comprising: The sand settling tank comprises an inner cylinder and an outer cylinder arranged concentrically, the upper part of the outer cylinder is fixedly connected to the sand filter plate, the interior of the inner cylinder is fixedly connected to the shielding cover through a support plate, the shielding cover is a conical cylinder, and sand outlet pipes are respectively arranged on both sides between the inner cylinder and the outer cylinder.

3. A method for assisting water diversion of a water turbine according to claim 2, characterized in that: The distance between the lower part of the shielding cover and the inner bottom end of the outer cylinder is half the height of the inner cylinder.

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