Combined hydraulic rectification device of pump station water inlet pool at ultralow water level

Abstract

The invention discloses a combined hydraulic rectification device of a pump station water inlet pool at an ultralow water level. The combined hydraulic rectification device comprises a diversion canal, a front pool, a water inlet pool, a water inlet pipe, a water inlet flared pipe, a flow guide table, an underwater vortex elimination cover plate and a W-shaped flow guide pier, wherein the water inlet pipe downwards extends into the rear end of the water inlet pool; the water inlet pipe is connected with the water inlet flared pipe; the flow guide table is arranged on a bottom plate of the water inlet pool and is coincident with the axial line of the water inlet flared pipe; the circumference surface of the flow guide table is a smooth curve surface; the cross section of the flow guide table is a round plane, and the area is gradually decreased from bottom to top; the underwater vortex elimination cover plate is arranged at the rear end of the water inlet pool, and is positioned in a connection position of the water inlet pipe and the water inlet flared pipe; the W-shaped flow guide pier is arranged on the bottom plate of the water inlet pool and is tightly attached to the rear wall of the water inlet pool; the W-shaped flow guide pier is formed by two flow guide edge piers and one flow guide middle pier; the W-shaped flow guide pier is higher than the underwater vortex elimination cover plate. The combined hydraulic rectification device has the advantages that the water flow of the water inlet pool is enabled to be uniform and stable, so that a water pump machine unit stably, safely and reliably operates at the ultra-low water level of the water inlet pool.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a combined hydraulic rectification device under an ultra-low water level in a pump station inlet pool. Background technique [0002] Pumping stations are an important part of water conservancy projects, the key to protecting and developing food production, and play an extremely important role in solving regional waterlogging, irrigation, water transfer and water supply. Due to the influence of natural precipitation and the construction environment of water conservancy projects, the water diversion conditions of some pump stations have changed, so that the operating water level of the pump station inlet pool cannot meet the requirements of the minimum or critical submerged depth of the pump inlet nozzle, resulting in the pump exceeding the water inlet pool. Running at a low water level will cause the flow state of the inlet pool to deteriorate, causing a seri...

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Problems solved by technology

[0005] For the pumping station where the pump operates under the ultra-low water level of the intake pool, since the water level of the intake pool does not meet the minimum or critical submerged water depth of the pump inlet pipe mouth and the second water exchange coefficient requirements of the effective volume of the intake pool, it is easy to generate a funnel in the intake pool Intake vortex, bottom vortex, wall vortex and return flow around the water inlet pipe. The above hydraulic rectification measures are mainly proposed for a certain situation. The flow state in the water inlet pool is poor, so an effective hydraulic rectification method must be required to improve the flow state of the water inlet pool and ensure uniform flow rate in the water inlet, which is a problem that researchers in this field must solve

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