A bottom sill structure for stilling pools

Abstract

The invention discloses a bottom sill structure for a stilling basin, which comprises a front bottom sill arranged on the bottom plate of the stilling basin and connected to the tail of an overflow tank, and a bottom sill arranged on the tail of the stilling basin bottom and connected to the tail of the overflow tank. The rear bottom sill connected with the apron; the upstream flow direction of the front bottom sill includes the first climbing section and the first concave arc section connected with the first climbing section, the front bottom sill The backwater flow direction includes a downhill section, and the downhill section includes a first upward convex arc section, a first concave-convex arc section and a first downward concave arc section. The tail bottom sill includes a buffer convoluted portion and a slow flow portion arranged at intervals along the width direction of the stilling basin, and the buffer convoluted portion includes a second climbing section and a second concave arc section connected with the second climbing section , the slow flow portion includes a second downward concave arc segment, a second concave-convex arc segment and a second upward convex arc segment. The bottom sill structure of the stilling pool of the present invention has good energy dissipation effect and makes water flow into the apron more smoothly.

Description

technical field [0001] The invention relates to energy dissipating equipment in water conservancy projects, in particular to a stilling pool and its bottom sill structure. Background technique [0002] Stilling pool is an energy dissipation facility used in water conservancy and hydropower projects to promote the generation of underflow hydraulic jumps downstream of discharge structures. The stilling pool can quickly change the rapid flow of the discharge into a slow flow. Generally, it can partially eliminate the kinetic energy of the discharge flow and shorten the length of the apron. It is an effective and economical energy dissipation facility. The stilling basin generally includes the stilling basin bottom plate connected with the overflow tank, the stilling basin side plates arranged on both sides of the stilling basin bottom plate, the stilling basin tail sill arranged at the end of the stilling basin, the tail of the stilling basin After the hurdle, set up the apron...

AI Technical Summary

Problems solved by technology

However, the problem with the bottom sill in this patent is that the energy dissipation of the water flow is insufficient, so that the water flow easily hits the bottom plate and the tail sill, causing cavitation or impact damage to the bottom plate or the tail sill

However, in this structure, a folded plate is set at the tail sill, so the depth of the stilling basin needs to be increased

Moreover, the water flow needs to cross the tail sill to reach the apron, so that the water at the tail sill cannot flow smoothly into the apron, and it will cause impact damage or cavitation at the tail sill

Images