Elbow-shaped water inlet conduit with excellent hydraulic performance and application method thereof

Abstract

The invention provides an elbow-shaped water inlet conduit with excellent hydraulic performance and an application method of the elbow-shaped water inlet conduit with excellent hydraulic performance, and belongs to the technical field of a pump station in a water conservancy project. The elbow-shaped water inlet conduit is geometrically characterized by comprising a linear segment, an elbow bending segment and a circular truncated cone segment. Middle separation piers are arranged in the linear segment. A value range is provided for a straight segment, the linear segment and the circular truncated cone segment which are geometrically simple, and detailed section position and section data are provided for the geometrically complex elbow bending segment. All dimensions of the elbow-shaped water inlet conduit are expressed with relative values, the actual required dimensions of the water inlet conduit of the pump station can be obtained as long as the relative values are multiplied by the diameter of a water pump impeller to be adopted in the pump station, and the parameters of the linear segment and the circular truncated cone segment can be adjusted within a certain range according to actual requirements of the pump station so that the different requirements of different pump stations for main geometrical parameters such as conduit length, conduit height and bottom edge inclination angle can be met. The elbow-shaped water inlet conduit with excellent hydraulic performance and the application method of the elbow-shaped water inlet conduit with excellent hydraulic performance can guarantee that the elbow-shaped water inlet conduit of each pump station is excellent in design quality and hydraulic performance, wide in application range and convenient to use, thereby having significance in guaranteeing safety, stability and efficient operation of medium and large pump stations.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering pumping stations, and specifically relates to an elbow-shaped water inlet channel with excellent hydraulic performance and an application method thereof. The quality of the design of the elbow-shaped inlet channel of large and medium-sized vertical pumping stations. Background technique [0002] Vertical pumping stations are the most widely used in my country, and the elbow-shaped water inlet channel is the most commonly used water inlet channel for large and medium-sized vertical axial flow pumping stations. And uniform shrinkage, to provide the required flow state for the inlet of the pump impeller chamber. An elbow-shaped inlet channel with excellent design performance is a necessary condition to ensure the safe, stable and efficient operation of the pump. The 14 newly established pumping stations in the first phase of the East Route of the South-to-North Water Diversion ...

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Problems solved by technology

The three-dimensional shape of the elbow-shaped inlet channel is complicated. The traditional hydraulic design method adopts the "average velocity method" based on one-dimensional theory, which is far from the actual three-dimensional turbulent flow in the channel. The quality of the hydraulic design of the elbow-shaped inlet channel is not guaranteed. The designed flow channel cannot meet the requirements of the pump impeller for the flow field, and sometimes even produces harmful flow states such as vortices in the flow channel, which seriously affects the safe, stable and efficient operation of the pump station

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