JPS6294728A - Automatic control device for burner - Google Patents

Automatic control device for burner

Info

Publication number
JPS6294728A
JPS6294728A JP60231196A JP23119685A JPS6294728A JP S6294728 A JPS6294728 A JP S6294728A JP 60231196 A JP60231196 A JP 60231196A JP 23119685 A JP23119685 A JP 23119685A JP S6294728 A JPS6294728 A JP S6294728A
Authority
JP
Japan
Prior art keywords
pressure
time
fuel
output
rate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60231196A
Other languages
Japanese (ja)
Inventor
Yoshitomo Murakami
村上 善朝
Akira Sugano
彰 菅野
Tadashi Komada
駒田 正
Sachio Yamanobe
山野辺 さちを
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP60231196A priority Critical patent/JPS6294728A/en
Publication of JPS6294728A publication Critical patent/JPS6294728A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/24Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00Measuring
    • F23N2225/04Measuring pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00Fail safe
    • F23N2231/18Detecting fluid leaks

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

PURPOSE:To be able to improve the reliability of leak check and shorten the check time by judging leak check with a deviation between fuel pressure and a setting obtained from a pressure setting device and a detecting circuit which are installed, and with containment time. CONSTITUTION:The climbing rate 16 of fuel pressure 14 emitted from a fuel pressure transmitter 3 is calculated by a differentiator 15. Attainment time 18 for a target pressure is calculated from the rate 16 and a pressure target value 36 put out from a target pressure setting device 35 in a preliminary arithmetic circuit 17. The time 19 is compared with a specified time 20 set up by a setting device 19 by a comparator 21 and when the time 18 is judged to be over the specified value by a comparison detector 23, an open instruction 24 is put out to a fuel charge valve 2 and an output from a contact point indicating possible leak is transmitted to a protection monitoring board 5 to carry out interlocking for plant protection. When containment is started, the sinking rate of pressure detected by a detector 15 for a rate of change is compared with a specifi-signal 36 for the pressure sinking rate by a comparator 31 and when the 16 is judged to be over the specified value, it is judged that there is a leak and an output from a contact point 34 is transmitted to the board 5 to carry out interlocking for plant protection.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はバーナ制御装置に係り、特に燃料配管のリーク
チェックに好適な制御方式に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a burner control device, and particularly to a control system suitable for checking leaks in fuel piping.

〔発明の背景〕[Background of the invention]

従来のリークチェック回路を第4図、第5図により説明
する。
A conventional leak check circuit will be explained with reference to FIGS. 4 and 5.

バーナ制御装置1内部で構成されるリークチェック指令
回路10からリークチェック指令11が出力されると燃
料チャージ弁2は開される。
When a leak check command 11 is output from a leak check command circuit 10 configured inside the burner control device 1, the fuel charge valve 2 is opened.

一方、リークチェック指令11が出力されると、タイマ
51はカウント開始する。このタイム設定は、燃料チャ
ージ弁2が″開″シてから目標圧力に到達するまでの推
定時刻がセットされ、通常分程度が設定される。ここで
、タイマがカウント終了すると燃料チャージ弁2に“閉
”指令52が出力され、燃料の封じ込めが開始される。
On the other hand, when the leak check command 11 is output, the timer 51 starts counting. This time setting is an estimated time from when the fuel charge valve 2 "opens" until reaching the target pressure, and is usually set to about a minute. Here, when the timer finishes counting, a "close" command 52 is output to the fuel charge valve 2, and fuel containment is started.

また、リークチェック指令11が出力されると、−タイ
マ53がセットされる。タイマ53は、リークチェチク
指令から上記燃料対じ込めが完了し。
Furthermore, when the leak check command 11 is output, a -timer 53 is set. The timer 53 completes the above fuel charging from the leak check command.

実圧が目標圧力の範囲内にあるかを判断するまで)の時
刻がセットされる。この時刻設定は、従来からの経験に
より設定され約2〜5分程度に設定されるのが一般的で
ある。
The time until it is determined whether the actual pressure is within the target pressure range is set. This time setting is based on past experience and is generally set to about 2 to 5 minutes.

第4図には、従来の上記リークチェック回路のタイムチ
ャートを示した。
FIG. 4 shows a time chart of the conventional leak check circuit.

即ち、リークチェック指令11が出力されると、燃料チ
ャージ弁2の″開″、″閉″時刻T1が設定される。
That is, when the leak check command 11 is output, the "open" and "close" times T1 of the fuel charge valve 2 are set.

又、チェック開始時刻T2もリークチェック指令11が
出力されると決定される。
Further, the check start time T2 is also determined when the leak check command 11 is output.

ここでチャージ弁2の動作2はTxは無条件に決定され
るとともに、チェック開始時刻T2も一義的に設定され
る。
Here, in the operation 2 of the charge valve 2, Tx is unconditionally determined, and the check start time T2 is also uniquely set.

従って、この間にリークが発生していても、Tz待時間
間はリークチェック失敗を検出することが困難であった
Therefore, even if a leak occurs during this time, it is difficult to detect a leak check failure during the Tz waiting time.

又、T2経路後圧力が正常が否かは、圧力スイッチを使
用して検出しているため、この誤動作による検出ミスが
リークチェック失敗とする要路となるケースも多かった
In addition, since a pressure switch is used to detect whether the pressure after the T2 path is normal, a detection error due to this malfunction often becomes the key to a leak check failure.

リークチェックの回路に関しては三菱重工技報Vol 
12 、 Ha 3 (1975−5)などで説明され
ている。
Regarding leak check circuits, see Mitsubishi Heavy Industries Technical Report Vol.
12, Ha 3 (1975-5), etc.

〔発明の目的〕 本発明の目的は、燃料配管のリークチェックの信頼性向
上、チェック時間の短縮を図り経済性向上が可能なチェ
ック方式を提供することにある。゛〔発明の概要〕 本発明の目的は、従来燃料チャージ弁の開、閉時間及び
、チェック開始時間をタイマにて固定改定していたのに
対し、燃料圧力発信器から検出される、燃料圧力の上昇
率から目標圧力到達時刻を予測して、チャージ弁の開時
間をプラント特性に見合って適切に枚宛可能とするとと
もに、燃料封じ込め時間も燃料実圧力の降下率をチェッ
クすることにより、大幅に短縮する方式にしたことにあ
る。
[Object of the Invention] An object of the present invention is to provide a check method that can improve the reliability of fuel pipe leak checks, shorten the check time, and improve economic efficiency.゛ [Summary of the Invention] An object of the present invention is to change the fuel pressure detected from the fuel pressure transmitter, whereas conventionally the opening and closing times of the fuel charge valve and the check start time were fixed and revised using a timer. By predicting the time when the target pressure will be reached from the rate of increase in fuel pressure, the charge valve opening time can be adjusted appropriately according to the plant characteristics, and the fuel containment time can be significantly reduced by checking the rate of drop in the actual fuel pressure. The reason is that we have shortened it to .

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を第1図により説明する。 An embodiment of the present invention will be described below with reference to FIG.

バーナ制御装置1内部のリークチェック回路10からリ
ークチェック指令11が出力されると、燃料チャージ弁
2が開動作し燃料がボイラ4に向って供給される。
When a leak check command 11 is output from a leak check circuit 10 inside the burner control device 1, the fuel charge valve 2 is opened and fuel is supplied toward the boiler 4.

リークチェック指令11によりカウンタ12で燃料チャ
ージ弁が実際に関する時刻をカウントする。
In response to the leak check command 11, the counter 12 counts the actual time at which the fuel charge valve operates.

燃料チャージ弁開時刻相当に達すると、燃料圧力発信器
3から出力される燃料圧力14の上昇率16を微分器1
5により演算する。この上昇率16と目櫻圧力設定器3
5から出力される圧力目標値36から、目標圧力到達時
刻18を予測演算回路17にて演算する。
When the time corresponding to the fuel charge valve opening time is reached, the rate of increase 16 of the fuel pressure 14 output from the fuel pressure transmitter 3 is determined by the differentiator 1.
Calculate by 5. This rate of increase 16 and the pressure setting device 3
A prediction calculation circuit 17 calculates the target pressure arrival time 18 from the pressure target value 36 outputted from the pressure target value 36 output from the pressure target value 36 output from the pressure target value 36 outputted from the pressure target value 36 outputted from the pressure target value 36 outputted from the pressure target value 36 outputted from the pressure target value 36 outputted from the pressure target value 36 outputted from the pressure target value 36 output from the pressure target value 36 outputted from the pressure target value 36 output from the pressure target value 36 output from the pressure target value 36 outputted from the pressure target value 36 output from the pressure target value 36 output from the pressure target value 36 output from the pressure target value 36 outputted from the pressure target value 36 output from the pressure target value 36 output from the target pressure attainment time 18 in the prediction calculation circuit 17 calculating the target pressure attainment time 18 from the pressure target value 36 outputted from 5.

この目標圧力到達時刻18は放定器19にて設定される
規定時刻20と比較器21で比較され、比較検出器23
により規定値以上と判定した場合には燃料チャージ弁2
に開指令24を出力するとともに、リーク有の接点を、
保護監視盤5に出力し、速やかにプラント保護インタロ
ックを動作させる。
This target pressure arrival time 18 is compared with a specified time 20 set by the radiator 19 by a comparator 21, and a comparison detector 23
If it is determined that the value is higher than the specified value, the fuel charge valve 2
At the same time, output the open command 24 to the contact point with a leak,
The output is output to the protection monitoring panel 5, and the plant protection interlock is immediately activated.

目標圧力到達時刻18が規定時刻以内であれば。If the target pressure arrival time 18 is within the specified time.

カウンタ25が時刻カウントを開始する。カウンタ25
が目標圧力到達時刻と判定すると、燃料チャージ弁閉指
命28が出力され、燃料の封じ込めが行われ、リークが
なければ燃料圧力はその位置に保持される。
Counter 25 starts counting time. counter 25
When it is determined that the target pressure has been reached, a fuel charge valve closing command 28 is output, the fuel is contained, and if there is no leak, the fuel pressure is maintained at that position.

従って、封じ込めが開始されると、変化率検出器15に
より、圧力の降下率16を検出し、降下率16を設定器
35から出力される圧力降下率規定信号36と比較器3
1にて比較され、検出器33により規定値以上の降下率
があると規定した場合にはリーク有として、保護監視盤
5に接点34を出力し、プラント保護インタロックを動
作させる。
Therefore, when containment is started, the change rate detector 15 detects the pressure drop rate 16, and compares the drop rate 16 with the pressure drop rate regulation signal 36 output from the setting device 35 and the comparator 3.
1, and if the detector 33 determines that there is a rate of decline greater than a specified value, it is determined that there is a leak, and a contact 34 is output to the protection monitoring panel 5 to activate the plant protection interlock.

又、圧力降下率16が規定範囲内にあれば次の診断回路
に進む。
If the pressure drop rate 16 is within the specified range, the process proceeds to the next diagnostic circuit.

即ち、圧力降下率が規定値以内にあり、実圧力14は圧
力目標値36と比較器37にて比較され、規定範囲内に
あれば、正常の接点40が比較検出器39から出力され
、リークチェック完了の接点45が保m監視盤5に出力
される。
That is, the pressure drop rate is within the specified value, the actual pressure 14 is compared with the pressure target value 36 by the comparator 37, and if it is within the specified range, a normal contact 40 is output from the comparison detector 39, and leakage is detected. A contact point 45 indicating that the check has been completed is output to the meter maintenance monitoring board 5.

又、規定範囲以下に降下している時には、リーク−有の
接点44が出力される。
Further, when the pressure has fallen below the specified range, a contact 44 indicating that there is a leak is output.

第2図には以上のべたリークチェック回路のフローチャ
ートを示した。
FIG. 2 shows a flowchart of the leak check circuit described above.

第3図は本発明によるリークチェック回路における、リ
ークチェック開始から完了するまでのタイムチャートを
示したものである。
FIG. 3 shows a time chart from the start to the completion of a leak check in the leak check circuit according to the present invention.

即ち、バーナ自動制御装置1のリークチェック回路10
からリークチェック指令11が出力されると燃料チャー
ジ弁2が開動作する。この時燃料圧力14は上昇を開始
する。この上昇率を用いて目標圧力に到達する時刻T1
が予測される。
That is, the leak check circuit 10 of the burner automatic control device 1
When a leak check command 11 is output from the fuel charge valve 2, the fuel charge valve 2 is opened. At this time, the fuel pressure 14 starts to rise. Time T1 when the target pressure is reached using this rate of increase
is predicted.

予測時刻Tlが規定時刻に比較し異常に長いT1を示し
た場合には連やかに燃料チャージ弁開指令24が出力さ
れる。
When the predicted time Tl shows an abnormally long time T1 compared to the specified time, the fuel charge valve opening command 24 is outputted one after another.

正常時には、目標圧力到達時刻Tlに達した段階で、燃
料チャージ弁2に閉指令が出力され、燃料の封じ込めが
開始される。
During normal operation, a closing command is output to the fuel charge valve 2 when the target pressure is reached at the time Tl, and fuel containment is started.

ここで、燃料圧力14の急激な降下が認められずかつ、
燃料圧力が起規範囲内にあれば、リークチェックはこの
時点で完了する。
Here, a sudden drop in the fuel pressure 14 is not recognized, and
If the fuel pressure is within the nominal limits, the leak check is complete at this point.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、燃料の封じ込め時間が従来の一律固定
設定から、実燃料圧力と目標値から決定していることか
ら、実際力が目標値に到達した時間で完了可能となり、
燃装置の節減、起動時間の短縮が可能となる。
According to the present invention, since the fuel containment time is determined from the actual fuel pressure and the target value, instead of the conventional uniformly fixed setting, it can be completed in the time when the actual force reaches the target value,
It is possible to save fuel equipment and shorten startup time.

又、リークチェックの初期に実圧力の上昇が認められな
かった場合には、速やかにリークチェック停止が可能で
あり、プラントの保護も可能となる。
Furthermore, if no increase in actual pressure is detected at the beginning of the leak check, the leak check can be stopped immediately, and the plant can be protected.

又、従来、目標圧力到達が否かのチェックは、圧力スイ
ッチを使用しており、このスイッチの誤動作によるテス
ト失敗に到る原因となっており、この圧力スイッチから
、燃料圧力発信器と目標圧力設定値との偏差から、規定
圧力到達を検出する方式としたことにより、信頼性の向
上が可能となった。
In addition, conventionally, a pressure switch was used to check whether the target pressure was reached, and malfunction of this switch could lead to test failure. Reliability has been improved by using a method that detects when the specified pressure has been reached based on the deviation from the set value.

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

第1図は、本発明の実施例であるリークチェック回路を
示す。 第2図は、本発明のフローチャートを示す、第3図は、
本発明のタイムチャートを示す、第4図は、従来実施さ
れているリークチェック回路を示す、第5図は、従来の
リークチェックのタイムチャートを示す。 1・・・バーナ制御装置、10・・・リークチェック回
路、17・・・目標圧力到達時刻予測回路、2・・・燃
料チャージ弁、3・・・燃料圧力検出器、4・・・ボイ
ラ、5・・・保護監視盤、7・・・圧力スイッチ。
FIG. 1 shows a leak check circuit according to an embodiment of the present invention. FIG. 2 shows a flowchart of the present invention, and FIG.
FIG. 4 shows a time chart of the present invention. FIG. 4 shows a conventional leak check circuit. FIG. 5 shows a conventional leak check time chart. DESCRIPTION OF SYMBOLS 1... Burner control device, 10... Leak check circuit, 17... Target pressure attainment time prediction circuit, 2... Fuel charge valve, 3... Fuel pressure detector, 4... Boiler, 5...Protection monitoring panel, 7...Pressure switch.

Claims (1)

【特許請求の範囲】[Claims] 1、燃料圧力発信器と燃料圧力設定器からなる燃料配管
リークチェック回路において、圧力設定器と実際に封じ
込めた燃料圧力を測定する検出回路を設け、燃料圧力と
設定値との偏差と封じ込め時間によりリークチェックの
合否の判定を行うようにしたことを特徴とする燃料配管
のバーナ自動制御装置。
1. In the fuel pipe leak check circuit consisting of a fuel pressure transmitter and a fuel pressure setting device, a pressure setting device and a detection circuit to measure the actual confined fuel pressure are installed, and the leak check circuit is equipped with a pressure setting device and a detection circuit that measures the actual confined fuel pressure. An automatic burner control device for fuel piping, characterized in that it determines whether a leak check has passed or failed.
JP60231196A 1985-10-18 1985-10-18 Automatic control device for burner Pending JPS6294728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60231196A JPS6294728A (en) 1985-10-18 1985-10-18 Automatic control device for burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60231196A JPS6294728A (en) 1985-10-18 1985-10-18 Automatic control device for burner

Publications (1)

Publication Number Publication Date
JPS6294728A true JPS6294728A (en) 1987-05-01

Family

ID=16919843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60231196A Pending JPS6294728A (en) 1985-10-18 1985-10-18 Automatic control device for burner

Country Status (1)

Country Link
JP (1) JPS6294728A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741113A1 (en) * 1995-11-09 1997-05-16 Bosch Gmbh Robert METHOD AND DEVICE FOR DETECTING A LEAK IN A FUEL SUPPLY SYSTEM OF A HIGH PRESSURE INJECTION INTERNAL COMBUSTION ENGINE
CN104132322A (en) * 2014-08-04 2014-11-05 章礼道 Semi-W flame combustion subcritical steam pocket furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741113A1 (en) * 1995-11-09 1997-05-16 Bosch Gmbh Robert METHOD AND DEVICE FOR DETECTING A LEAK IN A FUEL SUPPLY SYSTEM OF A HIGH PRESSURE INJECTION INTERNAL COMBUSTION ENGINE
CN104132322A (en) * 2014-08-04 2014-11-05 章礼道 Semi-W flame combustion subcritical steam pocket furnace

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