JPS58175308U

JPS58175308U - Boiler water supply control device

Info

Publication number: JPS58175308U
Application number: JP6885582U
Authority: JP
Inventors: 国広　祐司
Original assignee: バブコツク日立株式会社
Priority date: 1982-05-11
Filing date: 1982-05-11
Publication date: 1983-11-24
Also published as: JPH0223928Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の対象となる再循環系統を有するボイラ
装置の全体構成図、第２図は第１図における給水調節弁
及び再循環調節弁を制御する制御回路の構成を示すブロ
ック図、第３図は関数発生器３５の特性図である。４・・・再循環調節弁、６・・・給水調節弁、２２゜３
２．３６・・・減算器、２３．３８・・・比例積分器、
３１・・・微分器、３４・・・信号選択器、３５・・・
関数発生器。FIG. 1 is an overall configuration diagram of a boiler apparatus having a recirculation system that is the subject of the present invention, and FIG. 2 is a block diagram showing the configuration of a control circuit that controls the water supply control valve and recirculation control valve in FIG. 1. FIG. 3 is a characteristic diagram of the function generator 35. 4...Recirculation control valve, 6...Water supply control valve, 22゜3
2.36...Subtractor, 23.38...Proportional integrator,
31... Differentiator, 34... Signal selector, 35...
Function generator.

Claims

[Scope of utility model registration request]

(1) In a boiler device having a recirculation system that recirculates high-temperature fluid held in the boiler using a pump, a recirculation control valve that adjusts the recirculation flow rate of the high-temperature fluid, and a water supply flow rate that is force-fed to the boiler by a water supply pump. The control circuit includes a feed water control valve that adjusts the flow rate, and a control circuit that controls the opening degrees of these two control valves. a first control unit that outputs a control signal to the feed water regulating valve to control the feed water flow rate to a constant value; and a deviation between the recirculation flow rate calculated based on the feed water temperature and the actual recirculation flow rate and the feed water flow rate. a second outputting a control signal to the recirculation control valve for determining the recirculation flow rate based on the smaller of the deviations between the set rate of change of temperature and the actual rate of change;
A boiler water supply control device comprising: a control section;

(2) A signal speed limiter for changing the level of the control signal output from the second control section at a constant rate of change is provided at the output section of the second control section. A water supply control device for a boiler as set forth in claim (1) of the utility model registration claim.゛