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A method to ensure uniform water distribution in the inlet tank culvert of multi-pipe inflow sewage lifting pumping station

A sewage lifting and water inlet tank technology, applied in waterway systems, water supply devices, drainage structures, etc., can solve the problems of uneven water distribution, difficult to fully allocate evenly, affecting the safe and stable operation of sewage lifting pumping stations, and achieve a simple structure. , The effect of easy construction and production

Active Publication Date: 2019-08-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main problems of the sewage lifting pump station in the form of multi-pipe inflow are: due to the limited land area of ​​the confluence well of the sewage lifting pump station, there are often mainstream concentration and mutual interference between the flows of all directions when entering the confluence well, and There are bad flow states such as tumbling and bias flow, which make it difficult to fully distribute the water flow evenly before entering the water inlet box culvert, resulting in uneven water distribution in each hole of the water inlet box culvert and bad flow states such as backflow and vortex, which may easily cause the pumping station to concentrate Problems such as poor inflow conditions in the pool and poor inflow uniformity of the pump unit will affect the safe and stable operation of the sewage lifting pump station in serious cases

Method used

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  • A method to ensure uniform water distribution in the inlet tank culvert of multi-pipe inflow sewage lifting pumping station
  • A method to ensure uniform water distribution in the inlet tank culvert of multi-pipe inflow sewage lifting pumping station
  • A method to ensure uniform water distribution in the inlet tank culvert of multi-pipe inflow sewage lifting pumping station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066]The length of the confluence well 1 is L=9m, the width B=4m, the height H=4m, the diameter of the main inlet pipe 2 is D1=1.75m, and the angle between the centerline of the main inflow pipe 2 and the confluence well 1 is α=12°. The diameter D2 of the auxiliary inlet pipes 3 and 4 is 0.675m, the distance between the auxiliary inlet pipes 3 and 4 and the front side wall of the confluence well 1 is B1=0.4375B=1.75m, the main inlet pipe 2 and the auxiliary inlet pipe 3 The height H1=1.125m from the center line of , 4 to the bottom surface of confluence well 1, the inflow Q1 of the main inlet pipe 2 occupies 0.8 times of the total flow Q of the sump 6 of the pump station, and the inflow Q2 of the auxiliary inlet pipes 3 and 4 is 0.1 Q, the number of water inlet box culverts 5 is N=2, the centerline of water inlet box culverts 5 is at an elevation H2=H1=1.125m from the bottom surface of confluence well 1, the length of water inlet box culverts 5 is W=6.3m, and the height H3=D1 ...

Embodiment 2

[0068] The combined rectification measures described in this embodiment differ from Embodiment 1 in that: the angle between the center line of the main inlet pipe 2 and the confluence well 1 is α=0°, and the auxiliary inlet pipes 3 and 4 are connected to the confluence well 1 The distance from the front side wall is B1=0.6B=2.4m, the inlet flow Q1 of the main inlet pipe 2 is the total flow Q of the sump 6 of the pump station, the inlet flow Q2 of the auxiliary inlet pipe is 0, and the side walls on both sides of the inlet tank culvert 5 The included angle β=0°, the distance between the horizontal pier 7 and the front side wall of the confluence shaft 1 is B2=B1=2.4m, the width of the horizontal pier 7 is B3=0.2D2=0.135m, and the centerline of the main pier 7A of the horizontal pier The distance L1=0m from the center line of the confluence well 1, that is, the two coincide, the length of the main pier 7A is L2=0.8D1=1.4m, the length of the contact surface between the triangular ...

Embodiment 3

[0070] The combined rectification device described in this embodiment differs from Embodiments 1 and 2 in that: the angle between the center line of the main inlet pipe 2 and the confluence well 1 is α=45°, and the angle between the auxiliary inlet pipes 3 and 4 and the confluence well 1 The distance from the front side wall of well 1 is B1=0.3B=1.2m, the inflow Q1 of the main inlet pipe 2 occupies 0.5 times of the total flow Q of the sump 6 of the pump station, and the inflow Q2 of the auxiliary inlet pipes 3 and 4 is 0.25Q , the angle between the two sides of the water inlet box culvert 5 is β=20°, the distance between the horizontal pier 7 and the front side wall of the confluence well 1 is B2=B1=1.2m, and the width of the horizontal pier 7 is B3=0.4D2=0.27m , the distance L1==B2×tan(45°)=1.2m between the center line of the main pier 7A of the horizontal pier and the center line of the confluence shaft 1, the length of the main pier 7A L2=0.5D1=0.875m, the triangular guide p...

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Abstract

The invention discloses a method for ensuring uniformity of water distribution of a water charging box culvert of a multi-pipe inflowing sewage lifting pump station. A horizontal pier is arranged in aconfluence well of the multi-pipe inflowing sewage lifting pump station. A middle isolation piers and cross beams are arranged in the water charging box culvert. The horizontal pier, the middle isolation piers and the cross beams form a combined type flow integration device. The horizontal pier is used for carrying out flow integration on multi-pipe inflowing of the confluence well, so a functionof averaging the inflowing of the water charging box culvert is achieved. Through the middle isolation piers and the cross beams, averaging and flow integration effects are further achieved for inflowing of the water charging box culvert, so uniformity of distribution of flows of the water charging box culvert can be effective ensured, good flow charging conditions are provided for a water collection pool of the pump station and the method has high engineering application value for stable and highly efficient operation of the multiple-pipe inflowing sewage lifting pump station. According to the invention, the flow integration device is simple in structure and form, easy to construct and manufacture, and suitable for promotion and use in design and reformation engineering of the multiple-pipe inflowing sewage lifting pump station, and there is no need to additionally add the land utilization area of the pump station.

Description

technical field [0001] The invention relates to the technical field of municipal sewage lifting pumping station engineering, in particular to a method for ensuring uniform water distribution in inlet tanks and culverts of multi-pipe inflowing sewage lifting pumping stations. Background technique [0002] The municipal rain and sewage drainage system is an engineering facility system for treating and removing rain and sewage. It is an important infrastructure of a modern city. With the acceleration of urbanization in our country, the municipal rain and sewage drainage system is facing a great test. [0003] The sewage lifting pumping station is the core of the municipal rain and sewage drainage system. How to rationally design the sewage lifting pumping station under the various technical conditions specified is an important topic in the planning and design of the municipal rain and sewage drainage system. [0004] Due to the constraints of the urban land area, the layout of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E03F5/22
Inventor 张睿徐辉李京鸿
Owner HOHAI UNIV