A Method for Improving the Inlet Flow State of Urban Sewage Lifting Pumping Station

A technology for urban sewage and pumping stations, which is applied in waterway systems, water supply devices, drainage structures, etc., can solve the problems that affect the safety and stability of sewage lifting pumping stations, it is difficult to ensure the influent flow state of the pump unit, and the surface flow rate of the collecting tank is large. Achieve the effect of preventing the generation of surface vortices, easy construction and production, and simple structure.

Active Publication Date: 2019-07-05
HOHAI UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the tight urban land use, the sewage lifting pump station occupies a small area and the building structure is relatively compact, especially when the multi-directional inflow form is used, the water flow will flow sideways, resulting in lateral flow in the sump and a large surface flow velocity. , it is easy to induce bad flow phenomena such as surface vortex, it is difficult to ensure that the water pump unit has a good water flow state, which seriously affects the safety and stability of the sewage lifting pump station operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method for Improving the Inlet Flow State of Urban Sewage Lifting Pumping Station
  • A Method for Improving the Inlet Flow State of Urban Sewage Lifting Pumping Station
  • A Method for Improving the Inlet Flow State of Urban Sewage Lifting Pumping Station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, the plan of the urban sewage lifting pump station with the combined rectifying device proposed by the present invention, the structural dimensions of the rectifying device's elevation and the typical cross-sectional schematic diagram are as follows Figure 2~4 shown.

[0036] The sump 1 of the pumping station has a length of L=8m, a width of W=7.2m, the operating water depth of the pumping station is H=5m, the diameters of the forward water inlet pipe 2a and the right water inlet pipe 2b are D=1m, and the height from the bottom of the sump 1 is H0= 0.5H=2.5m, distance L1=0.2L=1.6m between water retaining straight plate and front wall of sump 1, thickness of water retaining plate 3 E1=0.05H=0.25m, distance between top of water retaining straight plate and sump 1 bottom H1=1.05 H=5.25m, the number of flow holes 4 on the top of the water retaining straight plate S1=10, the width B1=0.0139W=0.1m, the height H2=0.1H=0.5m, the number of water passing holes...

Embodiment 2

[0038] The combined rectifying device described in this embodiment differs from Embodiment 1 in that: the height of the water inlet pipes 2a and 2b of the pumping station from the bottom of the sump 1 is H0=0.6H=3m, and the distance between the water retaining straight plate and the front wall of the sump 1 L1=0.3L=2.4m, the thickness of water retaining plate 3 E1=0.06H=0.3m, the distance between the top of water retaining straight plate and the bottom of sump 1 H1=1.1H=5.5m, the number of flow holes 4 on the top of water retaining straight plate S1= 4. Width B1=0.02W=0.144m, height H2=0.2H=1m, number of water holes 5 in the middle of the water retaining straight plate S2=2, width B2=0.02W=0.144m, height H3=0.2H=1m, middle The distance between the water hole 5 and the bottom surface of the sump 1 is H4=0.5H=2.5m, the width of the rectangular section of the bottom water hole 6 on the sloping water retaining plate is B3=0.6×7.2 / 4=1.08m, and the height H5=0.1L= 0.8m, angle θ=0° b...

Embodiment 3

[0040] The combined rectification device described in this embodiment differs from Embodiments 1 and 2 in that: the height of the water inlet pipes 2a and 2b of the pumping station from the bottom of the sump 1 is H0=0.56H=2.8m, and the water retaining straight plate and the sump 1 The distance between the front wall L1=0.25L=2m, the thickness of the water retaining plate 3 E1=0.04H=0.2m, the distance between the top of the water retaining straight plate and the bottom of the sump 1 H1=1.08H=5.4m, the number of flow holes 4 on the top of the water retaining straight plate S1=8, width B1=0.01W=0.072m, height H2=0.12H=0.6m, the number of water holes 5 in the middle of the water retaining straight plate S2=6, width B2=0.01W=0.072m, height H3=0.12H =0.6m, the distance between the middle water hole 5 and the bottom surface of the sump 1 H4=0.6H=3m, the width of the rectangular section of the bottom water hole 6 on the sloping water retaining plate B3=0.4×7.2 / 4=0.72m, the height H5 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for improving the municipal sewage lift pump station water inlet flow condition. A combined rectification device composed of a water baffle, a water baffle beam, a beam and a water baffle slope is arranged at the front end of a lift pump station water collecting tank, different modes of inflow of the lift pump station is homogenized and split by means of the combined rectification device, the water inlet flow condition of each pumping unit water inlet tank of the pump station under different operation conditions can be effectively improved, and the great engineering application value is achieved for ensuring safe, stable and efficient operation of the municipal sewage lift pump station. According to the invention, the combined rectification device is simple, easy to construct and manufacture and suitable for being used and popularized in construction and modification projects of the municipal sewage lift pump stations with forward, lateral, multidirectional and other different water inflow modes.

Description

technical field [0001] The invention belongs to the technical field of municipal rain and sewage drainage of water conservancy projects, and in particular relates to a method for improving the water inlet flow state of an urban sewage lifting pumping station. Background technique [0002] With the acceleration of urbanization and industrialization in our country, the discharge of urban sewage is also increasing year by year, which leads to the continuous deterioration of natural water bodies and the serious situation of water resource pollution. In order to prevent and control water pollution and alleviate the shortage of water resources, the state has increased investment in the construction of urban sewage treatment system facilities in recent years. As an important part of pretreatment, the sewage lifting pump station plays an important role in the urban sewage treatment system, which is conducive to the construction of smart cities and sponge cities in my country. Due t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): E03F5/22
CPCE03F5/22
Inventor张睿徐辉钱向栋费照丹李京鸿孙子峻
OwnerHOHAI UNIV