Detailed application of vertical long axis suspended semi submersible sump pump in drainage renovation of low-lying areas in old urban areas

The vertical long axis suspended semi submersible sump pump, with its core characteristics of small footprint, no need to start the pump, and adaptability to complex working conditions of old pipe networks, is the core drainage equipment for old urban areas with limited space and high risk of waterlogging. The vertical long axis suspended semi submersible sump pump is fully suitable for the special needs of drainage renovation in low-lying areas of old urban areas. The specific application details are as follows:
Core drainage renovation scene in low-lying areas of the old city district
·Upgrading and Replacement of Old Pump Stations: Directly replace the outdated horizontal centrifugal pumps that have exceeded their service life in the old urban area, without the need for large-scale renovation of the original pump room structure. Install them directly using the existing collection wells, greatly reducing the difficulty of renovation construction and the impact on the lives of surrounding residents.
·Construction of distributed strong drainage stations in low-lying areas: In low-lying water accumulation points such as streets, alleys, and old residential areas where large-scale pumping stations cannot be built, small integrated drainage stations should be constructed. The compact vertical structure of the vertical long axis submersible pump can be directly installed on the top of small collection wells without occupying a large amount of ground space.
·Low water level direct pumping of old pipeline network: In response to the problem of small pipe diameter and insufficient drainage capacity of the original drainage pipeline network in the old urban area, water is directly pumped from the low water accumulation points at the end of the pipeline network to quickly improve the drainage efficiency of the pipeline network and solve the pain point of long-term water accumulation after rain in low-lying areas of the old urban area.
·After the transformation, the coordinated scheduling of drainage resources in the entire area: multiple vertically arranged long axis submersible pumps with distributed layout are connected to a unified intelligent scheduling platform, which dynamically starts and stops according to the real-time water level at different points in the old city area, achieving coordinated drainage resources in the entire area and greatly improving the overall drainage capacity of the old city area.
✅  Core advantages of scene specific adaptation
·The adaptability of the renovation is extremely strong: it does not require large-scale excavation of the ground or the construction of large pump rooms, and can directly reuse the existing old water collection wells and pipeline facilities in the old urban area. The renovation construction period is short, and it has minimal interference with the daily travel and life of residents in the old urban area.
·Quick start of non refilling pump: The pump body is fully submerged below the liquid level, and it can start instantly when the accumulated water reaches the preset water level. It is suitable for the characteristics of fast water collection speed in low-lying areas of old urban areas and easy rapid water accumulation after rain, avoiding long-term inability to discharge accumulated water.
·Extremely low maintenance difficulty: The rotor adopts a withdrawable design, and daily maintenance does not require dismantling the entire pipeline system, which is suitable for the limited technical ability of maintenance personnel in old urban areas and greatly reduces later maintenance costs.
·Higher drainage energy efficiency: Compared with traditional old pump types, the operating efficiency is increased by more than 20%. On the premise of significantly improving the total drainage capacity, the total installed power of the pump station can be reduced by 15%, making long-term operation more energy-efficient.
Key points for scene specific selection
·The selected flow rate is calculated based on the catchment area of low-lying areas in the old city area and the standard of short duration heavy rainfall that occurs once every 30 years. More than 40% of the drainage allowance is reserved to make up for the insufficient drainage capacity of the original pipeline network in the old city area.
·The overcurrent components are made of cast iron wear-resistant coating material, which can withstand the erosion of sediment, household waste and debris carried by rainwater in the old urban area pipeline network, and is not easily blocked or damaged during long-term operation.
·Equipped with low-noise motors and shock-absorbing bases, the operating noise is controlled within 60 decibels to avoid noise interference to residents in densely populated old urban areas.
·Priority should be given to supporting intelligent remote monitoring systems to achieve unmanned automatic start stop, without the need for dedicated personnel to be on site 24 hours a day, significantly reducing the manpower investment in the operation and maintenance of scattered drainage stations in the old city area.
Referring to the data of the existing vertical long axis suspended semi submersible sump pump drainage renovation project in the old urban area in China, after adopting this scheme, the total drainage capacity of the low-lying area system in the old urban area can be increased by more than 60%, and the water level in the low-lying points of the pipeline network generally drops by more than 0.8 meters after rain, completely solving the long-term pain point of waterlogging in the old urban area.