JPS6091909U - Boiler water supply system abnormality determination device - Google Patents

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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図Ａはボイラの縦断面図、第１図Ｂは第１図のＡ−
Ａ断面図、第２図はこの考案の実施例の制御ブロック図
、第３図は第２図の水位検出部の動作を示す波形図、第
４図は第２図の燃焼制御部の動作を示す波形図、第５図
は給水系の正常時のタイムチャート、第６図は給水系の
異常時のタイムチャート、第７図はこの考案の他の実施
例の制御ブロック図、第８図は第７図の動作を示すタイ
ムチャート、第９図はこの考案の更に他の実施例゛を示
すタイムチャートである。 １・・・ボイラ、２・・・水位検出部、３・・・給水制
御部、４・・・給水ポンプ、５・・・圧力検出部、６・
・・燃焼　　　゛制御部、７・・・空焚き検出部、８・
・・空焚き警報器、９・・・圧力スイッチ、９−１・・
・接点、３ｅ・・・リレー、３ｅ−１・・・接点、・６
ｂ・・・フリップフロップ、６ｆ・・・アンドゲート、
７ａ・・・クロックパルス発振器、７ｂ・・・アンドゲ
ート、７ｃ・・・バイナリカウンタ、Ｈ・・・上限水位
、Ｌ・・・下限水位、ＰＬ・・・下限蓋　　′気圧、Ｐ
Ｌ・・・上限蒸気圧、Ｓｌ・・・クロック信号、Ｓ２・
・・空焚き信号、Ｓ３・・・リセット信号。Figure 1A is a vertical cross-sectional view of the boiler, and Figure 1B is A- in Figure 1.
A sectional view, FIG. 2 is a control block diagram of an embodiment of this invention, FIG. 3 is a waveform diagram showing the operation of the water level detection section in FIG. 2, and FIG. 4 is a waveform diagram showing the operation of the combustion control section in FIG. 2. 5 is a time chart when the water supply system is normal, FIG. 6 is a time chart when the water supply system is abnormal, FIG. 7 is a control block diagram of another embodiment of this invention, and FIG. 8 is a time chart when the water supply system is normal. FIG. 7 is a time chart showing the operation, and FIG. 9 is a time chart showing still another embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Boiler, 2... Water level detection part, 3... Water supply control part, 4... Water supply pump, 5... Pressure detection part, 6...
... Combustion control section, 7... Dry firing detection section, 8.
・Dry firing alarm, 9...Pressure switch, 9-1...
・Contact, 3e...Relay, 3e-1...Contact, ・6
b...Flip-flop, 6f...And gate,
7a... Clock pulse oscillator, 7b... AND gate, 7c... Binary counter, H... Upper limit water level, L... Lower limit water level, PL... Lower limit lid 'Atmospheric pressure, P
L... Upper limit vapor pressure, Sl... Clock signal, S2.
...Dry firing signal, S3...Reset signal.

Claims (1)

【実用新案登録請求の範囲】 １　缶水水位を検出して下限上限水位信号を出力する水
位検出手段と、下限水位信号に応答してボイラに水を供
給する給水ポンプを始動させ、上限水位信号に応答して
給水ポンプを停止させる断続制御の給水制御手段及び缶
内蒸気圧を検知して下限蒸気圧、上限蒸気圧信号を出力
する蒸気圧検出手段と、下限蒸気圧信号に応答して加熱
装置を始動させ上限蒸気圧信号に応答して加熱装置を停
止させる加熱制御手段とを備えたボイラ系において、給
水に関する給水の態様により定められる特定期間内にお
け不燃焼時間を計測し、該燃焼時間が予め定められた時
間を超えると異常の信号を発するボイラの給水系異常判
別装置。 ２　給水に関する給水の態様により定められる特定期間
を給水ポンプが停止中の期間とした実用新案登録請求の
範囲第１項記載のボイラの給水系異常判別装置。− ３給水に関する給水の態様により定められる特定期間を
給水ポンプが動作中の期間とした実用新案登録請求の範
囲第１項記載のボイラの給水系異常判別装置。 ４　給水に関する給水の態様により定められる特定期間
を給水ポンプが停止中及び停止に引き続く動作の期間を
含めた期間とした実用新案登録請求の範囲第１項記載の
ボイラの給水系異常判別装置。[Scope of Claim for Utility Model Registration] 1. A water level detection means that detects the canned water level and outputs a lower limit/upper limit water level signal, and starts a water supply pump that supplies water to the boiler in response to the lower limit water level signal, and outputs an upper limit water level signal. a water supply control means for intermittent control that stops the water supply pump in response to the water pressure, a steam pressure detection means for detecting the steam pressure in the can and outputting a lower limit steam pressure and upper limit steam pressure signal, and a heating system in response to the lower limit steam pressure signal. In a boiler system equipped with heating control means that starts the device and stops the heating device in response to an upper limit steam pressure signal, the non-combustion time is measured within a specific period determined by the aspect of the water supply, and the combustion A boiler water supply system abnormality determination device that issues an abnormality signal when the time exceeds a predetermined time. 2. The boiler water supply system abnormality determination device according to claim 1, in which a specific period determined by the water supply mode is defined as a period during which the water supply pump is stopped. - 3. The water supply system abnormality determination device for a boiler according to claim 1, in which the period during which the water supply pump is in operation is defined as a specific period determined by the water supply mode related to water supply. 4. The boiler water supply system abnormality determination device according to claim 1, wherein the specific period determined by the water supply mode is a period that includes the period during which the water supply pump is stopped and the period in which the water supply pump continues to operate following the stoppage.