JPH0521034Y2 - - Google Patents
Info
- Publication number
- JPH0521034Y2 JPH0521034Y2 JP1987149967U JP14996787U JPH0521034Y2 JP H0521034 Y2 JPH0521034 Y2 JP H0521034Y2 JP 1987149967 U JP1987149967 U JP 1987149967U JP 14996787 U JP14996787 U JP 14996787U JP H0521034 Y2 JPH0521034 Y2 JP H0521034Y2
- Authority
- JP
- Japan
- Prior art keywords
- guide tube
- light guide
- optical sensor
- furnace
- melting furnace
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 17
- 239000000428 dust Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、溶解炉内に投入した材料の有無を検
出する光センサ装置に関し、特に、光センサの光
線を炉内に案内する光線ガイド管の機能を長期に
亘たつて円滑に保持するするようにした溶解炉用
光センサ装置に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to an optical sensor device that detects the presence or absence of material introduced into a melting furnace, and in particular, a light guide tube that guides the light beam of the optical sensor into the furnace. The present invention relates to an optical sensor device for a melting furnace that maintains its functions smoothly over a long period of time.
（従来の技術）
従来の技術として、投入した材料が堆積する溶
解炉の炉塔の上部壁に、一端が炉塔内に開口し他
端が外部に開口する直管状の光線ガイド管を貫通
支持し、この光線ガイド管の軸心部外方に炉塔内
の材料の有無を検出する光センサを配置してなる
溶解炉用センサ装置があつた。(Prior art) As a conventional technology, a straight light beam guide tube with one end opening into the furnace tower and the other end opening outside is supported through the upper wall of the furnace tower of the melting furnace where the input material is deposited. However, there was a sensor device for a melting furnace in which an optical sensor for detecting the presence or absence of material in the furnace column was placed outside the axis of the light guide tube.
（考案が解決しようとする問題点）
上記従来のものは、光線ガイド管を炉塔の上部
壁に単に貫通させるのみであつたため、炉内で発
生した塵埃、煙塵等が上記光線ガイド管内を流通
し、光線ガイド管の内周面に塵埃が付着すること
になる。(Problems to be solved by the invention) In the above conventional method, the light guide tube was simply passed through the upper wall of the furnace tower, so dust, smoke, etc. generated in the furnace circulated inside the light guide tube. However, dust will adhere to the inner circumferential surface of the light guide tube.
この状態を放置しておくと、上記光線ガイド管
が塵埃によつて目詰まり状態となり、光線の通過
を阻害して光センサの検出機能が低下する欠点が
あつた。 If this condition is left as it is, the light guide tube becomes clogged with dust, which obstructs the passage of light and reduces the detection function of the optical sensor.
そこで、これを解決するために、作業者がブラ
シ等により定期的に上記光線ガイド管を清掃する
ようにしていたが、これは、手数を要するととも
に危険を伴う欠点があつた。 In order to solve this problem, an operator periodically cleans the light guide tube with a brush or the like, but this has the disadvantage of being troublesome and dangerous.
本考案は、上記欠点を解消した新規な溶解炉用
光センサ装置を得ることを目的とする。 The object of the present invention is to obtain a novel optical sensor device for a melting furnace that eliminates the above-mentioned drawbacks.
（問題点を解決するための手段）
本考案は、上記目的を達成するために、以下の
如く構成したものである。(Means for Solving the Problems) In order to achieve the above object, the present invention is constructed as follows.
即ち、材料が堆積する炉塔の上部壁に、一端が
炉塔内に開口し他端が外部に開口する直管状の光
線ガイド管を貫通支持し、この光線ガイド管の軸
心部外方に前記材料の有無を検出する光センサを
配置してなる溶解炉用光センサ装置において、前
記上部壁と光センサとの間に光線貫通路を有する
防熱板を設け、前記光線ガイド管内に圧縮空気を
噴出する吐出管を開口させるとともに、その吐出
管に圧縮空気を間欠的に噴出させることができる
制御弁を接続する構成にしたものである。 That is, a straight light beam guide tube with one end opening into the furnace column and the other end opening outside is supported through the upper wall of the furnace column where the material is deposited, and a straight beam guide tube is provided extending outward from the axis of this light beam guide tube. In the optical sensor device for a melting furnace, which includes an optical sensor for detecting the presence or absence of the material, a heat shield plate having a light passage is provided between the upper wall and the optical sensor, and compressed air is introduced into the light guide tube. A discharge pipe is opened and a control valve is connected to the discharge pipe to intermittently jet compressed air.
（作用）
本考案は上記構成にしたものであるから、吐出
管から噴出する圧縮空気は、制御弁によつて間欠
的に噴出され、この噴出した圧縮空気が光線ガイ
ド管内を流通して該光線ガイド管内を清掃するこ
とになる。また、溶解炉から光線ガイド管を通し
て光センサ方向に向かう輻射熱は、防熱板によつ
て光センサの光線貫通路を除き阻止され、上記輻
射熱による光センサの加熱が防止されることにな
る。(Function) Since the present invention has the above-mentioned configuration, the compressed air jetted out from the discharge pipe is intermittently jetted out by the control valve, and this jetted compressed air flows through the light beam guide tube and the light rays. The inside of the guide tube will be cleaned. Further, the radiant heat directed from the melting furnace through the light guide tube toward the optical sensor is blocked by the heat shield plate except for the light passage through the optical sensor, thereby preventing the radiant heat from heating the optical sensor.
（実施例） 以下本考案の実施例を図面に基いて説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
図面において、第１図は本考案の実施例を示す
要部断面図、第２図はその光線ガイド管部を示す
拡大断面図、第３図は他の実施例を示す第２図相
当の拡大断面図である。 In the drawings, Fig. 1 is a cross-sectional view of the main part showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view showing the light guide tube portion thereof, and Fig. 3 is an enlarged view equivalent to Fig. 2 showing another embodiment. FIG.
第１図において、１は反射炉からなる溶解炉で
あり、大径かつ容器状に形成した炉底部２の上部
に、小径かつ長尺に形成した筒状の炉塔部３を一
体的に接続し、炉底部２にはバーナ（図示省略）
を設け、炉塔部３の頂部には材料投入口４を形成
してなる。 In Fig. 1, 1 is a melting furnace consisting of a reverberatory furnace, and a cylindrical furnace tower part 3 formed in a small diameter and long length is integrally connected to the upper part of a furnace bottom part 2 formed in a large diameter and container shape. A burner (not shown) is installed at the bottom 2 of the furnace.
A material inlet 4 is formed at the top of the furnace tower section 3.
上記炉塔部３の上部には光センサ装置５を設け
る。 An optical sensor device 5 is provided in the upper part of the furnace tower section 3.
即ち、直管つまりストレート状のパイプ材から
なる一対の光線ガイド管６，６を、炉塔３上部の
直線上にて互いに対向配置し、それぞれを炉塔壁
３ａに貫通支持する。 That is, a pair of light guide tubes 6, 6 made of straight pipe material are arranged opposite to each other on a straight line in the upper part of the furnace tower 3, and each is supported through the furnace tower wall 3a.
また、上記各光線ガイド管６，６の軸心部外方
に、赤外線を発光する発光管７と光電管８とを対
向配置、これらを炉塔壁３ａに固定したブラケツ
ト９，９により支持する。 Further, an arc tube 7 that emits infrared rays and a phototube 8 are arranged facing each other outside the axial center of each of the light guide tubes 6, 6, and are supported by brackets 9, 9 fixed to the furnace tower wall 3a.
また、上記各光線ガイド管６，６と各発光管７
と光電管８との間であつて、かつ発光管７および
光電管８に接近する位置に防熱板１４，１４を起
立配置して上記ブラケツト９，９に固定する。各
防熱板１４，１４は、その中心部に発光管７の光
線（赤外線）を通過させる小径の光線貫通路（符
号省略）を形成する。 In addition, each of the above-mentioned light guide tubes 6, 6 and each arc tube 7
Heat insulating plates 14, 14 are erected between the arc tube 7 and the phototube 8 and close to the arc tube 7 and the phototube 8, and are fixed to the brackets 9, 9. Each of the heat shield plates 14, 14 forms a small-diameter light beam penetration path (numerical omitted) through which the light beam (infrared rays) of the arc tube 7 passes through the center thereof.
上記光電管８は、発光管７から発光された赤外
線を入光した際には、材料投入装置（図示省略）
を起動させて材料投入口４から溶解炉１内に地
金、コークス等の材料アを投入し、この材料アが
炉塔３内に所定量堆積して上記光電管８への赤外
線の入光が遮断されると、上記材料投入装置を停
止させて溶解炉１内への材料アの投入を停止する
ようになつている。 When the phototube 8 receives infrared rays emitted from the arc tube 7, the phototube 8 is connected to a material input device (not shown).
is started, and material A such as metal or coke is introduced into the melting furnace 1 through the material input port 4, and a predetermined amount of this material A is deposited in the furnace tower 3, causing infrared rays to enter the phototube 8. When the melting furnace 1 is shut off, the material charging device is stopped and the charging of material A into the melting furnace 1 is stopped.
１０は空気供給装置であり、各光線ガイド管
６，６の内径よりも!?かに小径に形成した吐出管
１１，１１を設け、この吐出管１１，１１の先端
部１１ａ，１１ａは、第２図に示すように、各光
線ガイド管６，６の外端部側に臨ませるととも
に、各光線ガイド管６，６の内面に接近配置し、
これにより上記先端部１１ａ，１１ａを各光線ガ
イド管６，６の軸心部から径方向外方に偏倚させ
る。 Reference numeral 10 denotes an air supply device, which includes discharge pipes 11, 11 formed to have a diameter much smaller than the inner diameter of each light beam guide tube 6, 6. As shown in FIG. 2, it is placed facing the outer end side of each light guide tube 6, 6 and close to the inner surface of each light guide tube 6, 6,
This causes the tips 11a, 11a to be deviated radially outward from the axial center of each light guide tube 6, 6.
また、各吐出管１１，１１の基部は、制御弁１
２を介して圧縮空気供給源１３（エアポンプ）に
接続する。上記制御弁１２は例えば３分間毎に５
秒間開くように設定しておく。 Further, the base of each discharge pipe 11, 11 is connected to the control valve 1.
2 to a compressed air supply source 13 (air pump). For example, the control valve 12
Set it to open for seconds.
上記実施例によれば、制御弁１２が開作動する
と、圧縮空気供給源１３から各吐出管１１に圧縮
空気が供給され、この圧縮空気は吐出管１１の先
端部１１ａから各光線ガイド管６内に流入し、各
光線ガイド管６内には、清浄な圧縮空気が流通お
よび充満して、各光線ガイド管６内に付着した塵
埃を除去するとともに、溶解炉１内の気体、塵埃
等が各光線ガイド管６内に流入しなくなる。 According to the above embodiment, when the control valve 12 is operated to open, compressed air is supplied from the compressed air supply source 13 to each discharge pipe 11, and this compressed air enters each light guide pipe 6 from the tip 11a of the discharge pipe 11. clean compressed air circulates and fills each light guide tube 6, removing dust attached to each light guide tube 6, and removing gas, dust, etc. in the melting furnace 1. The light beam no longer flows into the light guide tube 6.
これにより、各光線ガイド管６内は塵埃による
目詰まりが発生しなくなり、光電管８による検出
機能が長期に亘たつて安定することになる。 As a result, the inside of each light guide tube 6 will not be clogged with dust, and the detection function of the phototube 8 will be stable over a long period of time.
この場合、上記吐出管１１から光線ガイド管６
に向かつて噴出する圧縮空気は、制御弁１２によ
つて間欠的に噴出されるので、吐出管１１から溶
解炉１内に流入する外気（圧縮空気）の量が少な
くなり、該外気による溶解炉１内の温度低下を防
止することになる。 In this case, from the discharge pipe 11 to the light guide pipe 6
Since compressed air is intermittently blown out toward the melting furnace 1 by the control valve 12, the amount of outside air (compressed air) flowing into the melting furnace 1 from the discharge pipe 11 is reduced. This will prevent the temperature inside 1 from dropping.
また、上記溶解炉１から光線ガイド管６を通し
て発光管７および光電管８（光センサ）方向に向
かう輻射熱は、防熱板１４によつて光線貫通路を
除き阻止され、これにより、上記輻射熱による発
光管７および光電管８の加熱が防止されることに
なる。 In addition, the radiant heat from the melting furnace 1 directed toward the arc tube 7 and phototube 8 (optical sensor) through the light guide tube 6 is blocked by the heat shield 14 except for the light beam passage. 7 and phototube 8 will be prevented from heating.
なお、吐出管１１は、その先端部１１ａを第３
図に示すように、光線ガイド管６の中間部の壁６
ａに外方から内方に向けて傾斜させて接続するよ
うにしてもよい。このようにすれば、吐出管１１
の先端部１１ａが光線ガイド管６内に突出しなく
なり、上記先端部１１ａの径および配置の設定が
容易となる。 Note that the discharge pipe 11 has its tip 11a connected to the third
As shown in the figure, the wall 6 of the middle part of the light guide tube 6
It may also be connected to a at an angle from the outside toward the inside. In this way, the discharge pipe 11
The distal end portion 11a does not protrude into the light guide tube 6, and the diameter and arrangement of the distal end portion 11a can be easily set.
（考案の効果）
以上の説明から明らかな如く、本考案は、光線
ガイド管内に圧縮空気を間欠的に供給するように
したので、溶解炉内の温度低下を招くことなく、
光線ガイド管内の塵埃の付着および堆積を防止す
ることができる。また、溶解炉から光センサに向
かう輻射熱を防熱板によつて阻止するようにした
ので、光センサの加熱を防止することができる。
従つて本考案は、光センサ装置の検出機能を長期
に亘たつて安定させることができる効果を奏す
る。(Effects of the invention) As is clear from the above explanation, the present invention allows compressed air to be supplied intermittently into the light guide tube, so that the temperature within the melting furnace does not drop.
Dust adhesion and accumulation within the light guide tube can be prevented. Further, since the heat shield plate blocks radiant heat from the melting furnace toward the optical sensor, heating of the optical sensor can be prevented.
Therefore, the present invention has the effect of stabilizing the detection function of the optical sensor device over a long period of time.
第１図は本考案の実施例を示す要部断面図、第
２図はその光線ガイド管部を示す拡大断面図、第
３図は他の実施例を示す第２図相当の拡大断面図
である。
１……溶解炉、２……炉底部、３……炉塔、３
ａ……炉塔壁、４……材料投入口、５……光セン
サ装置、６……光線ガイド管、７……発光管（光
センサ）、８……光電管（光センサ）、９……ブラ
ケツト、１０……空気供給装置、１１……吐出
管、１１ａ……先端部、１２……制御弁、１３…
…圧祝空気供給源、１４……防熱板、ア……材
料。
Fig. 1 is a sectional view of a main part showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view showing the light guide tube portion thereof, and Fig. 3 is an enlarged sectional view equivalent to Fig. 2 showing another embodiment. be. 1... Melting furnace, 2... Furnace bottom, 3... Furnace tower, 3
a... Furnace tower wall, 4... Material inlet, 5... Optical sensor device, 6... Light guide tube, 7... Arc tube (light sensor), 8... Photo tube (light sensor), 9... Bracket, 10... Air supply device, 11... Discharge pipe, 11a... Tip, 12... Control valve, 13...
... Pressure air supply source, 14... Heat shield plate, A... Material.
Claims (1)
に開口し他端が外部に開口する直管状の光線ガイ
ド管を貫通支持し、この光線ガイド管の軸心部外
方に前記材料の有無を検出する光センサを配置し
てなる溶解炉用光センサ装置において、前記上部
壁と光センサとの間に光線貫通路を有する防熱板
を設け、前記光線ガイド管内に圧縮空気を噴出す
る吐出管を開口させるとともに、その吐出管に圧
縮空気を間欠的に噴出させることができる制御弁
を接続したことを特徴とする溶解炉用光センサ装
置。 A straight light guide tube with one end opening into the furnace tower and the other end opening outside is supported through the upper wall of the furnace tower where the material is deposited, and the material is placed outside the axis of this light guide tube. In the optical sensor device for a melting furnace, which includes an optical sensor arranged to detect the presence or absence of a light beam, a heat shield plate having a light beam passage is provided between the upper wall and the optical sensor, and compressed air is jetted into the light guide tube. An optical sensor device for a melting furnace, characterized in that a control valve is connected to the discharge pipe to open the discharge pipe and to intermittently blow out compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149967U JPH0521034Y2 (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149967U JPH0521034Y2 (en) | 1987-09-30 | 1987-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6453985U JPS6453985U (en) | 1989-04-03 |
| JPH0521034Y2 true JPH0521034Y2 (en) | 1993-05-31 |
Family
ID=31422680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987149967U Expired - Lifetime JPH0521034Y2 (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0521034Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140643U (en) * | 1975-05-06 | 1976-11-12 | ||
| JPS5233063U (en) * | 1975-09-01 | 1977-03-08 |
-
1987
- 1987-09-30 JP JP1987149967U patent/JPH0521034Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6453985U (en) | 1989-04-03 |
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