JPS61107088A - Continuous type heating furnace - Google Patents
Continuous type heating furnaceInfo
- Publication number
- JPS61107088A JPS61107088A JP22726184A JP22726184A JPS61107088A JP S61107088 A JPS61107088 A JP S61107088A JP 22726184 A JP22726184 A JP 22726184A JP 22726184 A JP22726184 A JP 22726184A JP S61107088 A JPS61107088 A JP S61107088A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- air
- heating furnace
- heated
- radiation thermometer
- 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
Links
Landscapes
- Tunnel Furnaces (AREA)
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
【発明の詳細な説明】
〔発明の属する分骨〕
この発明は連続式加熱炉に係り、特に赤外線式電気ヒー
タからの放射エネルギーを加熱源とし温度制御に放射温
度計を用いて被加熱体の温度を検出するような加熱炉に
関する。[Detailed Description of the Invention] [Benefits to which the invention pertains] This invention relates to a continuous heating furnace, and in particular to a continuous heating furnace that uses radiant energy from an infrared electric heater as a heating source and uses a radiation thermometer to control the temperature of an object to be heated. It relates to a heating furnace that detects temperature.
第２図に従来装置の一例を示す。これは連続式コンベヤ
ー１１の上下から遠赤外線ヒータ１３で被加熱物１４を
加熱するようなものである。この加熱炉の温度制御は炉
内空気温度が一定になるようヒータ加熱量を調節計で調
整したり、コンベヤー１１の移動速度をあらかじめ調整
して被加熱体１４の出口温度を一定にするのが一般的で
あった。FIG. 2 shows an example of a conventional device. This is like heating the object 14 from above and below the continuous conveyor 11 with far infrared heaters 13. The temperature of the heating furnace can be controlled by adjusting the amount of heater heating with a controller so that the air temperature in the furnace remains constant, or by adjusting the moving speed of the conveyor 11 in advance to keep the outlet temperature of the heated object 14 constant. It was common.
しかし、これでは被加熱物の大きさや入口温度が異なる
と、出口では被加熱体温度は必ずしも一定にならない。However, if the size of the heated object or the inlet temperature differs, the temperature of the heated object will not necessarily be constant at the outlet.
そこで、コンベヤ−１１出口の被加熱物１４の温度を放
射温度計２０により測定し、コントローラ２１によって
遠赤外線ヒータ１３の加熱量を自動的に調整し、被加熱
物１４の出口温度を一定制御する方法がある。この際、
放射温度計の検出部は直接、被加熱物１４に面するため
、加熱炉内空気中の水蒸気や異物によって検出部表面が
汚染し正確な温度検出が出来なくなり制御精度が低下す
るという欠点があり、この方法は実用化されていない。Therefore, the temperature of the object to be heated 14 at the exit of the conveyor 11 is measured by the radiation thermometer 20, and the heating amount of the far-infrared heater 13 is automatically adjusted by the controller 21, thereby controlling the outlet temperature of the object to be heated 14 at a constant level. There is a way. On this occasion,
Since the detection part of the radiation thermometer directly faces the object to be heated 14, there is a drawback that the surface of the detection part is contaminated by water vapor and foreign matter in the air inside the heating furnace, making accurate temperature detection impossible and reducing control accuracy. , this method has not been put into practical use.
この発明の目的は前記従来技術の欠点を解消し。 The object of the present invention is to overcome the drawbacks of the prior art.
放射温度計の汚染を防１にし、常に制御５悄度が高い連
続式加熱炉を提供するにある。To provide a continuous heating furnace which prevents contamination of a radiation thermometer and always has high controllability.
この発明は放射エネルギーで加熱する被加熱物の温度を
放射温度泪を用いて測定し、放射エネルギー−鼾を調整
して被加熱物温度を一定に制御する際、放射温度計が次
第に汚染され制御精度の低下を防ぐため、放射温度計の
測定方向前方に清浄な空気やガスを強制的に流すように
したものである。In this invention, when the temperature of a heated object heated by radiant energy is measured using a radiant temperature drop and the temperature of the heated object is controlled to be constant by adjusting the radiant energy - snoring, the radiation thermometer becomes gradually contaminated and the control is stopped. In order to prevent a drop in accuracy, clean air or gas is forced to flow in front of the radiation thermometer in the measurement direction.
第１図は本発明の一実施例による加熱炉内部の正断面（
コンベヤ進行方向）を示したものである。FIG. 1 shows a normal cross section (
This shows the direction in which the conveyor travels.
被加熱物１４の温度を測定するために放射温度計２０を
上方に設け、その下方に空気を水平方向に流すため空気
吹出口２２と空気吸込口２３を設けたものである。A radiation thermometer 20 is provided above to measure the temperature of the object to be heated 14, and an air outlet 22 and an air inlet 23 are provided below it to flow air horizontally.
しかも、この空気は加熱炉外の空気を送風機２４で取り
入れ、フィルタ２６で空気を）′Ｈ浄にしだものである
。Moreover, this air is obtained by taking in air from outside the heating furnace with a blower 24 and purifying the air with a filter 26.
又、炉内の空気は排風ｍ２５により外に排出されるよう
になっており、吹出口２２と吸込口２３は空気がブツシ
ュ−プルの状態になっている。Further, the air inside the furnace is discharged to the outside by the exhaust air m25, and the air is in a state of being squeezed through the air outlet 22 and the suction port 23.
このため、放射温度計２０は炉内の空気で汚染されずに
常時、クリーンに保たれることになる。Therefore, the radiation thermometer 20 is always kept clean without being contaminated by the air inside the furnace.
なお、この炉に用いた加熱源は遠赤外線ヒータ１３であ
り、放射加熱するために空気の楕れによって、ノ々射エ
ネルギーが（貰われることなく被加熱体に達するため加
熱効率は従来と変わらない。The heating source used in this furnace is a far-infrared heater 13, and the heating efficiency is different from the conventional one because the radiant energy reaches the heated object without being received due to the ellipse of the air for radiant heating. do not have.
しかも、従来の放射加熱するような加熱炉では炉内の空
気温度がｖも常に上昇するのを防ぐため空気を常時、排
出するようになっている。本発明によりこのような目的
での排気も兼ねることが出来る。Moreover, in conventional heating furnaces that use radiation heating, air is constantly exhausted to prevent the air temperature inside the furnace from constantly rising. The present invention can also serve as exhaust for this purpose.
以」−のような構成と作用を持つ加熱炉は被加熱体の温
度を放射温度庄１で常にＩＦ確に１ｆｌ１１定できるた
め、遠赤夕１線ヒータによる加熱制御が正しく行えるこ
とになる。A heating furnace having the configuration and operation described below can always maintain the temperature of the object to be heated at an IF of 1fl11 at a radiation temperature of 1, so that heating control using a far-infrared single-wire heater can be performed correctly.
なお、前記実施例において、空気を水平に流しだがこれ
は放射温度計の測定方向と同一方向でも良い。In the above embodiments, the air was flowed horizontally, but the air may flow in the same direction as the measurement direction of the radiation thermometer.
又、空気の替りに窒素などの不活性ガスを用いでも良い
。Furthermore, an inert gas such as nitrogen may be used instead of air.
本発明により放射温度計の検出部は汚染されず常に清浄
であるため、温度測定が正確に々り被加第十図は従来の
連続式加熱炉の構成要素を示す１１・・・コンベヤー
１３・・・遠赤外線ヒータ１４・・・被加熱体
２０・・・放射温度計２２・・・空気吹出口
２３・・・空気吸込口２４・・・送風機 ２５
・・・排風機。According to the present invention, the detection part of the radiation thermometer is not contaminated and is always clean, so temperature measurement is accurate.Figure 11 shows the components of a conventional continuous heating furnace.
13... Far infrared heater 14... Heated object
20... Radiation thermometer 22... Air outlet
23...Air suction port 24...Blower 25
...Exhaust fan.
Claims (1)
もに、被加熱物の温度を放射温度計で測定し、前記放射
エネルギーの量を調整して、前記被加熱物の温度を一定
に制御するようにされた連続式加熱炉において、前記放
射温度計の測定方向の前方に清浄な気体を流す手段を設
けたことを特徴とする連続式加熱炉。The object to be heated is continuously heated by radiant energy, the temperature of the object to be heated is measured with a radiation thermometer, and the amount of the radiant energy is adjusted to control the temperature of the object to be heated to be constant. A continuous heating furnace characterized in that the continuous heating furnace is provided with means for flowing clean gas in front of the radiation thermometer in the measurement direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22726184A JPS61107088A (en) | 1984-10-29 | 1984-10-29 | Continuous type heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22726184A JPS61107088A (en) | 1984-10-29 | 1984-10-29 | Continuous type heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61107088A true JPS61107088A (en) | 1986-05-24 |
Family
ID=16858046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22726184A Pending JPS61107088A (en) | 1984-10-29 | 1984-10-29 | Continuous type heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61107088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63223488A (en) * | 1987-03-12 | 1988-09-16 | 大同特殊鋼株式会社 | Method and device for controlling temperature of heater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53133513A (en) * | 1977-04-27 | 1978-11-21 | Nippon Steel Corp | Operating method for continuous heat treatment furnace |
| JPS57198983A (en) * | 1981-06-02 | 1982-12-06 | Nippon Steel Corp | Measuring device for temperature of surface of body in furnace |
-
1984
- 1984-10-29 JP JP22726184A patent/JPS61107088A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53133513A (en) * | 1977-04-27 | 1978-11-21 | Nippon Steel Corp | Operating method for continuous heat treatment furnace |
| JPS57198983A (en) * | 1981-06-02 | 1982-12-06 | Nippon Steel Corp | Measuring device for temperature of surface of body in furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63223488A (en) * | 1987-03-12 | 1988-09-16 | 大同特殊鋼株式会社 | Method and device for controlling temperature of heater |
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