Waterproof hammer energy-saving cascade pumping station system and waterproof hammer operation method

Abstract

The invention discloses a waterproof hammer energy-saving cascade pumping station system, and discloses a corresponding waterproof hammer operation method. The electric control device acquires the flow velocity of water in the water delivery main pipe at each electromagnetic valve every 0.5 seconds through each flow velocity sensor. And compare v1 and v2 for the flow rate sensor data at each solenoid valve, v1 is the flow rate measured by the flow rate sensor 0.5 seconds ago, v2 is the flow rate measured by the current flow rate sensor; when v1≤v2, there is no flow rate drop to 0 Risk; when v1>v2, the electronic control device calculates the time T required for the flow rate to drop to 0 according to formula 1; formula 1 is: T=v2 / ⊿v; where, ⊿v=v1-v2; when T≤TG+ At 0.25 seconds, the electric control device controls the corresponding solenoid valve to close. The invention effectively protects water resources from being lost in large quantities due to pipe bursting caused by water hammer, and protects the environment of water diversion projects from being damaged due to pipe bursting, and has positive technical, environmental protection and economic significance.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a cascaded pumping station system. Background technique [0002] The water supply of cascade pumping stations has been widely used in our country, but some problems have also been exposed. Among them, water hammer is a problem that may cause serious damage to facilities such as pipelines and water pumps. The most common occurrence of water hammer accidents is water hammer when the pump is stopped, especially when the pump is stopped due to an accident, it is easy to cause water hammer. Misoperation, lightning strikes and power outages may cause accidental shutdown of the pump. [0003] Water hammer can be very costly. For example, the Fengjiashan water diversion project in Baoji City had 6 consecutive bursts of pipes from 1999 to 2005, resulting in large-scale water cuts in urban areas, causing tens of millions of direct economic losses, and brought negat...

AI Technical Summary

Problems solved by technology

If the valve is closed too slowly, the phenomenon of reverse flow of water and water pump cannot be prevented; if the valve is closed too fast, it will bear a large hydraulic impact; if the valve is closed too fast or too slow, water hammer may occur

In short, the hydraulic control slow-closing check valve only reduces the probability of water hammer when the pump is stopped, and cannot eliminate the phenomenon of water hammer when the pump is stopped.

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