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

A technology of rectification device and water inlet pool, which is applied in water supply devices, pump stations, buildings, etc., can solve the problems of poor flow state of water inlet pool and poor effect of pump stations, etc., to eliminate bottom vortex and backflow, eliminate water flow turbulence, prevent The effect of sedimentation

Active Publication Date: 2017-05-31
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: In this embodiment, if Figure 1-2As shown, a combined hydraulic rectification device under the ultra-low water level of the water inlet pool of the pumping station, including the water diversion channel 1, the forebay 2 and the water inlet pool 3, and also includes the water inlet pipe 4 connected to the water pump, the water inlet trumpet pipe 5, and the diversion Platform 6, underwater vortex elimination cover plate 7 and "W" type diversion pier 8, the water inlet pipe 4 extends downward into the rear end of the water inlet pool, and the inlet end of the water inlet pipe 4 is connected to the outlet end of the water inlet horn pipe 5 , the inlet diameter of the water inlet horn tube 5 is greater than the outlet diameter; the deflector 6 is arranged on the bottom plate of the water inlet pool 3, located directly below the water inlet horn tube 5, and the axis of the guide table 6 and the water inlet horn tube 5 Coincident; the circumferential surface of ...

Embodiment 2

[0038] Embodiment two: if Figure 3-4 As shown, this embodiment is basically the same as Embodiment 1, the difference is that the flow guide table 6 is divided into upper and lower parts, and the circumferential surface of the upper part of the flow guide table 6 is formed by a circular arc around the flow guide table 6 A smooth curved surface formed by the axis of the flow guide table 6, the circumferential surface of the lower part of the flow guide table 6 is a smooth curved surface formed around the axis of the flow guide table 6 by a segment of oblique line, the circumferential surface of the upper part of the flow guide table 6 and the lower part of the flow guide table 6 Smooth transitions on the circumference.

[0039] The diversion middle pier of the "W"-shaped diversion pier 8 is an equilateral triangular prism.

[0040] The height of the upper part of the flow guide table 6 is 2 / 3 of the height of the flow guide table 6 , and the height of the lower part of the flo...

Embodiment 3

[0041] Embodiment 3: This embodiment is basically the same as Embodiment 1. The difference is that the height of the diversion platform 6 is 1 / 3 of the height of the inlet of the water inlet trumpet tube 5 and the height of the bottom plate of the water inlet pool 3 . The distance between the leading edge and the trailing edge of the vortex cover plate 7 is 1.2 times and 1.0 times of the inlet diameter of the water inlet horn pipe 5 respectively from the center of the water inlet horn pipe 5 .

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B5/00
CPCE03B5/00
Inventor 高传昌刘新阳汪顺生王松林高志锴曾新乐唐林钧胡一伟李欢王贝贝
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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