Underflow energy dissipater with pressurized pipeline used for outflow

Abstract

The invention discloses an underflow energy dissipater with a pressurized pipeline used for outflow. The underflow energy dissipater is composed of the pressurized pipeline 1 and a stilling basin 5. The front half segment of the pressurized pipeline 1 is located on the upstream outside the stilling basin 5 and provided with at least two pressurized turning segments 2, a vertical segment 9 is arranged between the first pressurized turning segment and the second pressurized turning segment, and the rear half segment of the pressurized pipeline 1 is located at the bottom of the stilling basin and communicated with the stilling basin 5 through at least two water outlets formed in the pipe wall. Through the underflow energy dissipater, not only can an energy dissipation area be arranged in the stilling basin through the water outlets evenly distributed on the pressurized pipeline, but also energy dissipation can be performed along the course through the pressurized turning segments designed on the pressurized pipeline, and therefore concentrated energy dissipation in the prior art is changed into dispersed energy dissipation, the energy dissipation effect is improved, the energy dissipation function of the stilling basin is fully played, the building scale of the stilling basin is reduced, investment is reduced, and the underflow energy dissipater is flexible in application and capable of adapting to different flows and waterheads.

Description

technical field [0001] The invention belongs to the technical field of flood discharge and energy dissipation facilities in water conservancy and hydropower projects, and in particular relates to an undercurrent energy dissipation facility using pressurized pipelines to discharge water. Background technique [0002] Underflow energy dissipation is a commonly used form of energy dissipation in hydropower projects. It is not only suitable for the energy dissipation of the overflow of the dam body, but also suitable for the energy dissipation of the outlet of the flood discharge tunnel. The basic principle of bottom flow energy dissipation is to form a hydraulic jump at the front of the stilling tank, and use the tumbling section of the hydraulic jump to generate strong shearing and mixing of the water body, and convert the kinetic energy of the water body into heat energy to achieve the purpose of energy dissipation. Although the bottom flow energy dissipation method is widely...

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Problems solved by technology

Although the bottom flow energy dissipation method is widely used, it still has two deficiencies: first, the main energy dissipation area is concentrated in the hydraulic jump section in the front, and the water body in the rear is not fully utilized, resulting in the failure of large-scale stilling pools. It can fully play the role of energy dissipation; secondly, relying only on the water jump energy dissipation in the front of the stilling pool, without energy dissipation along the way, it is necessary to concentrate all the energy dissipation in the stilling pool, which will undoubtedly increase the energy consumption of the stilling pool. The construction scale of the power pool increases the investment

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