Heat supply secondary pipe network distributed balance control system and control method thereof

Abstract

The invention discloses a heat supply secondary pipe network distributed balance control system and a control method thereof. The system comprises a front-end control system and a tail-end control system and is provided with a master control machine and microcontrollers; and the system is characterized in that: the master control machine is connected with a plurality of microcontrollers through wireless communication; a first pressure transmitter, a second pressure transmitter, a header pipe flowmeter, a variable frequency pump, an electric control valve and a general packet radio service (GPRS) module are connected to the master control machine respectively; and a third pressure transmitter, a fourth pressure transmitter, a branch pipe flowmeter, a balancing control valve and a GPRS module are connected to the microcontrollers respectively. The invention has the advantages that: the pressure difference and flow of a pipe network in each building can be detected, pressure difference between an input end and an output end of the pipe network in each building is guaranteed, pressure difference between a heat supply header pipe and a backflow header pipe is guaranteed, and flow balance between the heat supply header pipe and a heat supply branch pipe is monitored simultaneously; and therefore, the secondary pipe network is operated stably, pipelines are prevented from vibrating, and the service life of the pipelines is prolonged.

Description

technical field [0001] The invention relates to a heat supply system, in particular to a distributed balance control system of a heat supply secondary pipe network and a control method thereof. Background technique [0002] In colder regions, residential buildings, classrooms, office buildings and other buildings are equipped with heating and heating systems. Chinese patent CN2816635 discloses a boiler energy-saving heating system, which introduces the distribution and working principle of the heating pipe network in detail, and uses temperature sensors and intelligent controllers to control the heating time of each user to achieve energy saving. Purpose. [0003] In order to achieve the balance control of the pipeline, someone proposed the front-end differential pressure control technology, that is, at the front end of the secondary pipe network, the flow rate of the main pipe is controlled by detecting the pressure difference between the heat supply main pipe and the retu...

AI Technical Summary

Problems solved by technology

[0004] However, in various existing heating systems, regardless of whether the front-end differential pressure control or the most unfavorable differential pressure control is adopted, the balance control of the pipe network is not ideal. The flow of the heating branch pipes is not completely balanced, and pressure fluctuations in some pipes even cause pipe vibrations, which not only cause adverse effects on users, but also shorten the service life of the pipes

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