Stage pump and water mixing pump unit for users applied to building with low terrain

Abstract

The invention provides a stage pump and water mixing pump unit for users applied to a building with low terrain, which comprises a water mixing pipe arranged between a water supply pipe and a water return pipe, and a stage pump and a water mixing pump which are arranged on the water return pipe; one end of the water mixing pipe is arranged on the water return pipe between the stage pump and the water mixing pump; and the stage pump provides power for water in a main transmission and distribution water supply pipe network flowing to the water supply pipe, and the water mixing pump mixes water in the water supply pipe and return water in the water return pipe to be at a temperature required by a user and then supplies the mixed water to the user. The flows of the stage pump and the water mixing pump can be changed only by adjusting the motor speeds of the stage pump and the water mixing pump, so that the problems of excessive flow supply at the front end of the pipe network and insufficient flow supply at the tail end of the pipe network are effectively solved.

Description

technical field [0001] The invention relates to the field of pipeline network transmission and distribution systems, in particular to a user unit of graded mixed water pumps applied to buildings with low terrain. Background technique [0002] In the past few decades, my country's cooling and heating pipeline network transmission and distribution methods have adopted centralized pipeline network transmission and distribution systems. During operation, there will be excessive pressure on the resources of near-end users of the pipeline network and excessive flow; The far-end user's resource pressure is too small, the flow rate is too small, and the water mixing device installed at the user's place in the centralized cooling and heating pipe network transmission and distribution system is equipped with a throttling valve, which consumes the excess pressure of the near-end pipe network and generates waste. Power consumption reduces the transmission efficiency of cooling and heating...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a user unit of graded mixed water pumps used in low-lying buildings. The graded pumps and mixed water pumps are installed on the water supply pipes, which solves the problem that the throttling valves in the prior art consume a large amount of power consumption of the pipe network. Causes excessive flow supply at the front end of the pipe network and insufficient flow supply at the end, resulting in hydraulic imbalance of the pipe network, resulting in loss of cooling and heat transmission and distribution, and waste of electric energy

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