A Method for Improving Inlet Flow State of Porous Inflow Pumping Station

A pumping station and water flow technology, which is applied in the field of improving the inflow state of the multi-hole inflow pumping station, can solve the problems that it is difficult to ensure the inflow condition of the pump unit, affect the safe and stable operation of the pumping station, and the surface flow rate of the forebay of the pumping station is large, and achieve structural Simple, easy to manufacture, prevents the effect of inflow conditions

Active Publication Date: 2019-06-07
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Restricted by urban planning, terrain, scale and other conditions, urban drainage pumping stations occupy a relatively small area and the structure of water intake buildings is relatively compact. The inflow form of the porous inlet tank is adopted, and there are prone to adverse flow phenomena such as lateral flow, high surface velocity, and surface suction vortex in the forebay of the pumping station. It is difficult to ensure that the pump unit has good inflow conditions, which will seriously affect the pumping station. safe and stable operation

Method used

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  • A Method for Improving Inlet Flow State of Porous Inflow Pumping Station
  • A Method for Improving Inlet Flow State of Porous Inflow Pumping Station
  • A Method for Improving Inlet Flow State of Porous Inflow Pumping Station

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Embodiment 1

[0028] In this embodiment, the plane of the drainage pump station with the compound rectification device proposed by the present invention and the structural dimensions of the elevation of the rectification device are shown as follows: figure 2 , 3 shown.

[0029]The length of the forebay 4 of the pump station is L=8.5m, the width W=18.3m, the length of the inlet diffusion section L1=0.624L=5.3m, the angle between the side wall of the diffusion section and the center line of the forebay 4=24°, the forebay 4 The distance between the highest operating water level and its bottom is H0=5.2m. The pumping station adopts a water inlet box culvert 5 with four holes inflow. There are 6 pump units in the pumping station, numbered a to f in sequence, and the middle two (c, d) are The flow rate is 2.04m 3 / s, the rest are 4.08m 3 / s; the separation pier 1 is arranged along the central line of the forebay 4 of the pumping station and parallel to the main flow direction, the length of t...

Embodiment 2

[0031] The composite rectifying device described in this embodiment differs from Embodiment 1 in that: the length of the diffuser section of the inlet of the pump station forebay 4 is L1=0.4L=3.4m, and the angle between the side wall of the diffuser section and the center line of the forebay 4 β=24°; the length L2=0.5L+tan(β / 3)L=5.5m of the separation pier 1, the height H=1.05H0=5.46m, the distance from the entrance side of the forebay 4 L3=L-L2=3m ;There are 5 crossbeams, the distance between the front end of the crossbeam and the dividing pier 1 is L4=0.05L=0.425m; the width of the crossbeam 2 is B1=0.01L=0.085m, the height is H1=0.1H0=0.52m, and the vertical distance between the two crossbeams is The spacing H2=0.05H0=0.26m; the thickness B2=0.03L=0.255m of the diversion plate 3, the vertical plate height H3=0.7H0=3.64m of the diversion plate 3, and the angle θ=25° between the inclined plate at the lower end and the horizontal plane .

Embodiment 3

[0033] A kind of compound rectification device described in this embodiment to improve the inlet water flow state of a multi-hole inflow pumping station is different from Embodiment 1 in that: the length of the inlet diffusion section of the forebay 4 of the pumping station is L1=0.7L=5.95m, and the diffusion The angle β=0° between the section side wall and the center line of the front pool 4; The distance of the entrance side L3=L-L2=4.25m; there are two beams 2, and the beams are flush with the front end of the dividing pier 1, that is, L4=0m; the thickness of the beam 2 is B1=0.04L=0.34m, and the height H1=0.3 H0=1.56m, the vertical distance between two beams H2=0.15H0=0.78m; the thickness of the drainage plate 3 B2=0.005L=0.0425m, the vertical plate height H3=0.4H0=2.08m, and its lower end is inclined The angle between the plate and the horizontal plane is θ=45°.

[0034] Such as Figure 4 As shown, the three-dimensional flow numerical simulation method is used to compar...

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Abstract

The invention discloses a method for improving the water inlet flow state of a multi-hole inflow pump station. The water inlet box culvert is arranged at the water inlet end of the forebay of the pump station, and a composite rectification device is arranged in the forebay of the pump station. The method of pumping station inlet water flow state uses a compound rectifier to suppress the lateral flow in the forebay of the pump station, which is beneficial to reduce the surface flow velocity of the forebay and increase the flow velocity at the bottom, which can effectively prevent the generation of suction vortex on the surface and ensure that the pump has good performance. It is of great significance to ensure the safe, stable and efficient operation of the pumping station. The invention has a simple structure, is easy to process and manufacture, and is suitable for popularization and application in the construction and renovation of municipal drainage pumping stations using porous water inlet box culverts.

Description

technical field [0001] The invention belongs to the technical field of municipal drainage of water conservancy projects, and in particular relates to a method for improving the water flow state of a multi-hole inflow pumping station. Background technique [0002] As an important infrastructure in the urban drainage system, the drainage pump station is responsible for the main responsibility of urban flood control and drainage. It plays an important role in the efficient use of urban water resources in my country, the protection of urban water safety, the improvement of urban water environment, and the acceleration of new urbanization construction. significance. Restricted by urban planning, terrain, scale and other conditions, urban drainage pumping stations occupy a relatively small area and the structure of water intake buildings is relatively compact. The inflow form of the porous inlet tank is adopted, and there are prone to adverse flow phenomena such as lateral flow, h...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E03F5/22
CPCE03F5/22
Inventor张睿陈毓陵徐辉周春天孙子俊王璇李禹苏正洋张晓露
OwnerHOHAI UNIV