JPH0624670Y2 - Overheat prevention device using flame eye - Google Patents

Overheat prevention device using flame eye

Info

Publication number
JPH0624670Y2
JPH0624670Y2 JP12681388U JP12681388U JPH0624670Y2 JP H0624670 Y2 JPH0624670 Y2 JP H0624670Y2 JP 12681388 U JP12681388 U JP 12681388U JP 12681388 U JP12681388 U JP 12681388U JP H0624670 Y2 JPH0624670 Y2 JP H0624670Y2
Authority
JP
Japan
Prior art keywords
eye
flame
blower
heating device
combustion
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.)
Expired - Lifetime
Application number
JP12681388U
Other languages
Japanese (ja)
Other versions
JPH0254042U (en
Inventor
功 日野
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.)
Miura Co Ltd
Original Assignee
Miura Co 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 Miura Co Ltd filed Critical Miura Co Ltd
Priority to JP12681388U priority Critical patent/JPH0624670Y2/en
Publication of JPH0254042U publication Critical patent/JPH0254042U/ja
Application granted granted Critical
Publication of JPH0624670Y2 publication Critical patent/JPH0624670Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Regulation And Control Of Combustion (AREA)
  • Control Of Combustion (AREA)

Description

【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、ボイラー等の熱機器を運転停止後の熱気に
よって焼損させないために、フレームアイを用いてその
過熱を防止するようにした装置に関するものである。
[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a device for preventing overheating by using a flame eye in order to prevent thermal equipment such as a boiler from being burned by hot air after operation is stopped. It is a thing.

〔従来技術〕[Prior art]

熱機器の分野においては、バーナーなどの加熱装置の運
転停止後、熱気によって周辺の付属機器が焼損したり、
性能の劣下を招く等の問題があることが知られている。
In the field of thermal equipment, after operation of a heating device such as a burner is stopped, peripheral equipment is burned out by hot air,
It is known that there are problems such as deterioration of performance.

特にボイラーの場合、第1図に示すように、缶体(1)内
部の上下のヘッダの周辺には、熱保有性の高い耐火材
(7),(7′)が充填されていることにより、バーナ停止
後、ポストパージを行い、燃焼室内の残留燃焼ガスを排
出しても燃焼室内はこれら耐火材からの放熱により、高
温状態を維持しており、その熱気が燃焼室上部のウイン
ドボックス(8)内を上昇してくるために、近辺の送風機
(14)やフレームアイ(13)等の付属機器が加熱され易く、
焼損等が起こり易い状態となっている。
Especially in the case of a boiler, as shown in Fig. 1, around the upper and lower headers inside the can body (1), a refractory material with high heat retention is used.
Due to the filling of (7) and (7 '), after the burner is stopped, post-purging is performed, and even if residual combustion gas in the combustion chamber is discharged, the high temperature state is generated in the combustion chamber due to heat dissipation from these refractory materials. Since the hot air is maintained and rises in the wind box (8) above the combustion chamber, the blower in the vicinity is maintained.
(14) and the frame eye (13) etc. are easily heated,
It is in a state where burnout etc. easily occurs.

〔考案が解決しようとする課題〕[Problems to be solved by the device]

上述のような不都合を解決するために、出願人は、先に
実開昭63-30753号において、温度センサをウインドボッ
クス内に取り付け、これによって設定温度以上の温度を
検知すると、送風機を駆動し、ウインドボックス並びに
周辺の付属機器を冷却する装置を提案している。しかし
ながら、このような装置によれば、温度センサを余分に
付設しなければならず、また該温度センサ自身の耐久
性、信頼性に関して誤動作や劣下等の心配もある。
In order to solve the above-mentioned inconvenience, the applicant previously installed a temperature sensor in a wind box in Japanese Utility Model Laid-Open No. 63-30753, and when it detects a temperature above a set temperature, it drives a blower. , A device for cooling wind boxes and peripheral accessories are proposed. However, according to such a device, an additional temperature sensor must be additionally provided, and there is a concern that the temperature sensor itself may malfunction or be inferior in terms of durability and reliability.

〔課題を解決するための手段〕[Means for Solving the Problems]

この考案は、上述の課題並びにフレームアイを形成する
cdsセルの抵抗か温度により可変する性質を持つこと
に着目し、バーナ等の加熱装置の燃焼炎検知用のフレー
ムアイの抵抗を該熱機器の運転停止後に測定する手段
と、該測定値があらかじめ設定した値以上であれば送風
機を再起作動させるように働く制御装置を設けてなるこ
とを特徴とするものである。
This invention focuses on the above-mentioned problems and the fact that the resistance of the cds cell forming the flame eye or the property of being varied depending on temperature has been taken into consideration, and the resistance of the flame eye for detecting the combustion flame of a heating device such as a burner is set to the thermal equipment. It is characterized in that it is provided with a means for measuring after the operation is stopped and a control device which works to restart the blower if the measured value is equal to or more than a preset value.

〔実施例〕〔Example〕

以下、この考案の実施例を図面と共に説明する。 An embodiment of the present invention will be described below with reference to the drawings.

第1図及び第2図は、この考案を実施する多管式貫流ボ
イラーの一実施例を示す縦断面図及び上面図であって、
缶体(1)は、環状に形成された上部管寄せ(2)並びに下部
管寄せ(3)を多数の垂直水管(4)で連結した構成より成っ
ている。かかる水管は、半径方向に間隔をおいた2個の
同心円状の環状水管列として配列され、内方の環状水管
列(4a)と外方の環状水管列(4b)との間には、燃焼ガス通
路(6)が形成されている。
1 and 2 are a vertical cross-sectional view and a top view showing an embodiment of a multi-tube type once-through boiler for carrying out the present invention.
The can body (1) has a configuration in which an upper pipe header (2) and a lower pipe header (3) formed in an annular shape are connected by a large number of vertical water pipes (4). Such water pipes are arranged as two concentric annular water pipe rows that are spaced apart in the radial direction, and between the inner annular water pipe row (4a) and the outer annular water pipe row (4b), combustion is performed. A gas passage (6) is formed.

また、内方の環状水管列(4a)の内側は、燃焼室(5)とな
っており、前記燃焼ガス通路(6)を介して煙道(図示せ
ず)と連通している。
A combustion chamber (5) is formed inside the inner annular water pipe array (4a) and communicates with a flue (not shown) through the combustion gas passage (6).

該燃焼室は、下端を耐火材(7)により、また上端をウイ
ンドボックス(8)の底壁部分によりそれぞれ封じられて
おり、かかるウインドボックス底壁中央には、エアレジ
スタ(9)及びバーナノズル(10)が前記燃焼室(5)内に、そ
の一端を臨ませて設置されている。
The combustion chamber is sealed at its lower end by a refractory material (7) and at its upper end by the bottom wall portion of the wind box (8), and the air register (9) and burner nozzle ( 10) is installed in the combustion chamber (5) with one end thereof facing.

ウインドボックス(8)の上部近傍個所には、バーナノズ
ル(10)に燃料を供給するための燃料供給配管(11)及びこ
れを閉開する電磁弁(12),火炎の輝度により燃焼状態を
検知するフレームアイ(13),並びに燃焼室に燃焼用空気
を供給する送風器(14)等の加熱装置とその附属機器が取
り付けられている。
A fuel supply pipe (11) for supplying fuel to the burner nozzle (10), a solenoid valve (12) that closes and opens the fuel supply pipe (11) near the upper part of the wind box (8), and detects the combustion state by the brightness of the flame. A flame eye (13), a heating device such as a blower (14) for supplying combustion air to the combustion chamber, and its associated equipment are attached.

上述のフレームアイを形成するcdsセルは、第3図に
示すように、一定輝度(暗態時も含む)において、その
抵抗値を温度に応じて変化させる性質をもっており、温
度センサとしても機能する。(15)は、そのようなフレー
ムアイの性質を利用して雰囲気温度を測定し、その測定
値に応じて、送風機をon−off制御するように働く
制御装置である。
As shown in FIG. 3, the cds cell forming the frame eye has the property of changing its resistance value according to the temperature at a constant brightness (including in the dark state), and also functions as a temperature sensor. . (15) is a control device that works to measure the ambient temperature by utilizing such a property of the flame eye and to control the blower on-off according to the measured value.

以上のような構成において、その動作を説明するに,燃
焼装置(15)の運転が停止すると、送風機(14)の稼動でポ
ストパージが行われ、未燃ガスも含めた燃焼ガスがボイ
ラ外部に排出される。一定時間後送風機は停止し、ポス
トパージが終了するが、これとともに燃焼時に加熱され
た耐火材(7),(7′)等からの放熱により、燃焼室内空気
は温度上昇を始め、時には数百度にも到達する。このた
め、燃焼室内の加熱された空気は、エアレジスタ(9)を
通ってウインドボックス内に流入するようになり、ウイ
ンドボックス壁面や、これに取り付けられた送風機(1
4),フレームアイ(13)及び電磁弁(12)等の附属機器を加
熱する。
To explain the operation of the above configuration, when the operation of the combustion device (15) is stopped, post-purge is performed by the operation of the blower (14), and the combustion gas including unburned gas is discharged to the outside of the boiler. Is discharged. After a certain period of time, the blower stops and the post-purge ends, but the heat from the refractory materials (7), (7 '), etc., which are heated during combustion, causes the temperature inside the combustion chamber to start rising, sometimes to several hundred degrees. Also reach. Therefore, the heated air in the combustion chamber comes to flow into the wind box through the air register (9), and the wind box wall surface and the blower (1
4) Heat the accessory equipment such as the flame eye (13) and solenoid valve (12).

よって他の附属機器と同様に温度上昇を始めるフレーム
アイは、第3図に示すように、温度上昇に伴ってその抵
抗値が増大する。そこで、あらかじめ危険温度と判断さ
れる抵抗値を定めておき、シーケンスあるいはプログラ
ム等でその抵抗値以上の値を制御装置(15)が検知したと
き、この危険温度状態が解消されるまで送風機(14)を継
続運転し、もしくは再起動させて加熱装置やその附属機
器を冷やすようにする。
Therefore, as in the case of other auxiliary equipment, the flame eye that starts to increase in temperature has its resistance value increased as the temperature increases, as shown in FIG. Therefore, a resistance value that is determined to be a dangerous temperature is set in advance, and when the control device (15) detects a value equal to or higher than the resistance value in a sequence or program, the blower (14 ) Is continuously operated or restarted to cool the heating device and its accessories.

尚、図面では、上記の一連の動作を行うための具体的な
電気的制御回路は割愛してあるが、このような制御回路
は、加熱装置の運転を制御する回路内にある燃焼時のフ
レームアイの抵抗値を検出し、燃焼状態を検知する回路
部分をポストパージ後に再使用するごとく構成すること
も可能で、このようにすれば、より安価な装置とするこ
とができる。
In the drawings, a specific electric control circuit for performing the above-described series of operations is omitted, but such a control circuit is included in a flame control frame for controlling the operation of the heating device. It is also possible to configure the circuit portion for detecting the resistance value of the eye and detecting the combustion state so as to be reused after the post-purge, and by doing so, a more inexpensive device can be obtained.

また、上記フレームアイの劣下や故障は、加熱装置の作
動中の動作特性によって検知することもでき(例えば正
常に燃焼しているのに不着火を検出したりする場合)、
自身の性能チェックをしながら、上述の温度センサとし
てのフレームアイの信頼性を高めることができる。
In addition, the deterioration or failure of the flame eye can be detected by the operating characteristics of the heating device during operation (for example, in the case of detecting misfire while normally burning),
The reliability of the flame eye as the above-mentioned temperature sensor can be enhanced while checking its own performance.

〔考案の効果〕[Effect of device]

この考案は、上述したような構成であるので、以下のよ
うな実用上の効果を挙げることができる。
Since the present invention has the configuration as described above, the following practical effects can be obtained.

(1)温度センサ等特別な装置を別個に付設する必要がな
く、装置のほとんどを、燃焼システム中のフレームアイ
やその抵抗検知回路によって兼用できるので、安価な装
置とすることができる。
(1) It is not necessary to separately attach a special device such as a temperature sensor, and most of the device can be commonly used by the flame eye and its resistance detection circuit in the combustion system, so that an inexpensive device can be obtained.

(2)温度センサとしてのフレームアイの故障等は、燃焼
システム作動中にチェックできるので誤動作のままずっ
と放置されることがなく、信頼性の高い装置とすること
ができる。
(2) Since the failure of the flame eye as a temperature sensor can be checked during the operation of the combustion system, it is not left as a malfunction for a long time, and a highly reliable device can be provided.

(3)加熱装置の運転停止後に起こりがちな、附属機器の
焼損がなくなり、メンテナンス作業の軽減とともに長期
間に亙って安全に使用し得るという利点がある。
(3) There is an advantage that the auxiliary equipment, which is apt to occur after the operation of the heating device is stopped, is not burned, the maintenance work is reduced, and it can be used safely for a long period of time.

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

第1図はこの考案を実施するボイラーの縦断面図、第2
図はその平面図、第3図はフレームアイの温度−抵抗値
特性図である。 (1)……缶体、(13)……フレームアイ (14)……送風機、(15)……制御装置
FIG. 1 is a vertical sectional view of a boiler for carrying out this invention, and FIG.
FIG. 3 is a plan view thereof, and FIG. 3 is a temperature-resistance value characteristic diagram of the flame eye. (1) …… Can body, (13) …… Frame eye (14) …… Blower, (15) …… Control device

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】加熱装置と、この加熱装置に組み込まれた
フレームアイ及び送風機を備えてなる熱機器において、
前記加熱装置の運転停止後にフレームアイの抵抗を測定
する手段と、該測定値があらかじめ設定した値以上であ
れば、前記送風機を再起動するように働く制御装置を設
けたことを特徴とするフレームアイを用いた過熱防止装
置。
1. A heating device comprising a heating device, a flame eye and a blower incorporated in the heating device,
A frame characterized by being provided with a means for measuring the resistance of the frame eye after the operation of the heating device is stopped, and a control device that works to restart the blower if the measured value is a preset value or more. Overheat prevention device using an eye.
JP12681388U 1988-09-27 1988-09-27 Overheat prevention device using flame eye Expired - Lifetime JPH0624670Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12681388U JPH0624670Y2 (en) 1988-09-27 1988-09-27 Overheat prevention device using flame eye

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12681388U JPH0624670Y2 (en) 1988-09-27 1988-09-27 Overheat prevention device using flame eye

Publications (2)

Publication Number Publication Date
JPH0254042U JPH0254042U (en) 1990-04-19
JPH0624670Y2 true JPH0624670Y2 (en) 1994-06-29

Family

ID=31378673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12681388U Expired - Lifetime JPH0624670Y2 (en) 1988-09-27 1988-09-27 Overheat prevention device using flame eye

Country Status (1)

Country Link
JP (1) JPH0624670Y2 (en)

Also Published As

Publication number Publication date
JPH0254042U (en) 1990-04-19

Similar Documents

Publication Publication Date Title
CA2003799C (en) Vent overpressurization detection system for a fuel-fired induced draft furnace
US5393222A (en) Thermoelectric sensor
JP4511760B2 (en) Combustion equipment with flame shield
US6766771B1 (en) Fuel-fired water heater with dual function combustion cutoff switch in its draft structure
US5169301A (en) Control system for gas fired heating apparatus using radiant heat sense
JPH0624670Y2 (en) Overheat prevention device using flame eye
US20180363950A1 (en) Thermistor system for temperature measurement in a gas water heater combustion chamber
JPH0722600Y2 (en) Water heater safety device
JP3117579B2 (en) Combustion safety device
JP3079628B2 (en) Combustion appliance safety device
JPS6038830Y2 (en) instant water heater
JP2917611B2 (en) Combustion equipment
CZ2000966A3 (en) Safety control of burner and apparatus for making the same
KR0169056B1 (en) Hot water temperature keeping method for gas-boiler in case of adverse wind
JPH0422213Y2 (en)
JPH08606Y2 (en) Overheat prevention device for combustion equipment
JPS6026279Y2 (en) liquid fuel combustion equipment
KR20210054340A (en) Heating apparatus including gas furnace and method for controlling the heating apparatus thereof
KR0186027B1 (en) Method of controlling air fuel ratio of combustor
JPS6234136Y2 (en)
JP3693203B2 (en) Incomplete combustion prevention device
JPS6330030Y2 (en)
JPH0330771B2 (en)
JPH0213880Y2 (en)
JP4262876B2 (en) Incomplete combustion prevention device