JPH09505662A - Continuous furnace - Google Patents
Continuous furnaceInfo
- Publication number
- JPH09505662A JPH09505662A JP7514738A JP51473895A JPH09505662A JP H09505662 A JPH09505662 A JP H09505662A JP 7514738 A JP7514738 A JP 7514738A JP 51473895 A JP51473895 A JP 51473895A JP H09505662 A JPH09505662 A JP H09505662A
- Authority
- JP
- Japan
- Prior art keywords
- distance
- guide track
- distance detector
- furnace
- tunnel
- 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.)
- Granted
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0001—Positioning the charge
- F27D2003/0002—Positioning the charge involving positioning devices, e.g. buffers, buffer zones
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D2021/0057—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects
- F27D2021/0092—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects against a jam in the transport line or a production interruption
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Tunnel Furnaces (AREA)
Abstract
(57)【要約】 長手方向に延びた通過トンネル(2)を備えた連続炉は炉内通過物のための案内軌道(3)を備えている。通過トンネル(2)には第一の距離検出器(12)及びこれと間隔をおいて第二の距離検出器(18)が配置されている。第一の距離検出器(12)により案内軌道(3)上にある被測定対象(4a)の第一の距離検出器(12)に属する案内軌道(3)上の第一の基準点(13)からの距離(L1)が、第二の距離検出器(18)により案内軌道(3)上にある被測定対象(4b)の第二の距離検出器(18)に属する案内軌道(3)上の第二の基準点(14)からの距離(L3)が求められる。両基準点は互いに間隔を持っている。両距離検出器は炉通過物の反り返りを検出する安全装置を形成する。 (57) [Summary] A continuous furnace having a passage tunnel (2) extending in the longitudinal direction is provided with a guide track (3) for passing through the reactor. A first distance detector (12) and a second distance detector (18) spaced apart from the first distance detector (12) are arranged in the passage tunnel (2). A first reference point (13) on the guide track (3) belonging to the first distance detector (12) of the measured object (4a) on the guide track (3) by the first distance detector (12). The distance (L1) from the second distance detector (18) belongs to the second distance detector (18) of the measured object (4b) on the guide trajectory (3). The distance (L3) from the second upper reference point (14) is determined. Both reference points are spaced from each other. Both distance detectors form a safety device to detect the curling of the furnace passage.
Description
【発明の詳細な説明】 連続炉 この発明は、長手方向に延びた加熱可能な通過トンネルと、炉通過物のための 案内軌道と、この案内軌道上の炉通過物の反り返りを検出する安全装置とを備え た連続炉に関する。 このような連続炉はドイツ連邦共和国特許出願公開第2757700号明細書 から公知である。炉通過物のための案内軌道には一列に同じ長さの金属からなる 移送ボートが配置され、このボートはこの案内軌道上を順番に連続炉の通過トン ネルを通って移送される。案内軌道は少なくとも通過トンネルの入口前において 金属からなり、この金属部と通過トンネルの壁の加熱要素との間に電気的な抵抗 測定装置が接続されている。金属からなる移送ボートが連続炉の通過トンネル内 部を通って移動する間に反り返ると、移送ボートと加熱要素との間に短絡が生じ 、抵抗測定装置が移送ボートの移送装置を直ちに停止させる。これにより連続炉 の特に加熱要素の損傷が回避される。 この発明の課題は、この公知の連続炉をさらに改良して、移送ボートが通過ト ンネル内において反り返るのを、この移送ボートが金属からなるのではなく、例 えばセラミックのような電気的に非伝導性の物質からなる場合にも、監視するこ とを可能にすることにある。 この課題の解決のために、冒頭に述べた種類の連続炉において、この発明によ れば、通過トンネルに第一の距離検出器が、またこれと通過トンネルの方向に見 て間隔をおいて第二の距離検出器が配置され、第一の距離検出器により案内軌道 上にある被測定対象の第一の距離検出器に属する案内軌道上の第一の基準点から の距離が、また第二の距離検出器により案内軌道上にある被測定対象の第二の距 離検出器に属する案内軌道上の第二の基準点からの距離が求められると共に、両 基準点が互いに間隔を持って配置されている。 炉通過物が一列に配置された同じ長さのボートからなり、その長さが両距離検 出器の基準点の間の距離より小さい場合には、常に一つのボートが第一の距離検 出器の基準点を他のボートが第二の距離検出器の基準点を通過したのと丁度同じ 距離だけ通過したかどうかが常に確認される。これは装置が正常に運転されてい ることを示す。しかしながら、一方のボートが第一の距離検出器の基準点を他方 のボートが第二の距離検出器の基準点を通過する以上に通過した瞬間に、これは 両基準点間でボートが反り返ったことを示し、その結果ボートの連続炉の通過ト ンネルを通る走行が異常を取り除くために中断される。 請求項2乃至4は請求項1による連続炉の良好な実施態様を示すものである。 この発明及びその利点を図面を参照して1つの実施例で詳細に説明する。 図1はこの発明による連続炉の通過トンネルを概略的に、 図2は図1による通過トンネルにおける距離発信器を概略的に、 図3は図1による通過トンネルにおける案内軌道の斜視図を示す。 図1に示された通過トンネル2はセラミックボート4のための案内軌道3を備 え、このボートは同じ長さを持ち、案内軌道3上に一列に並んで配置されている 。このセラミックボート4は例えば焼結材を載置するためのものである。通過ト ンネル2にはさらに電気的な加熱要素が設けられているが、これは図1では示さ れていない。通過トンネル2の入口端には側方の挿入口5が、他端即ちこの通過 トンネル2の出口端には側方の取出し口6が設けられている。 通過トンネル2の入口端にはさらに案内軌道3の上に2つの送りチェーン8を 備えた移送体7が設けられている。この両送りチェーン8の各々には歯車9の歯 面がそれぞれ係合している。両歯車9は駆動電動機11の駆動軸10に嵌まって いる。駆動軸10にはさらに第一の距離検出器としてエンコーダ12が取り付け られ、その属する案内軌道3の基準点は側方の挿入口が位置する案内軌道3の端 部の縁13である。エンコーダ12は一つのセラミックボート4aに接している 移送体7の側面と、従ってセラミックボート4a自体と基準点13との距離を検 出する。 エンコーダ12は、図2に示すように、駆動軸10に同心的に固定して取り付 けられているセグメント円板24を持っている。セグメント円板24は、これに 同心的に配置され異なる半径を持つ多数の円形のコード列15を備えている。各 コード列15には、セグメント円板24の一方の側に光源16及び他方の側にこ の光源16に対応するフォトダイオード17を備える光バリヤがそれぞれ付属し ている。個々のコード列15のコードパターンにおいて対応のコード列に付属す る光バリヤの光線がセグメント円板24を通過する。 エンコーダ12は、駆動軸10の従ってセグメント円板24の各角位置に対し て駆動軸10の回転方向に無関係に一義的な信号を発し、この信号により駆動軸 10の角位置、従って最終的には移送体7に接しているセラミックボート4aの 基準点13からの距離が読み取られる。 案内軌道3従って通過トンネル2の他端にはもう一つの距離検出器として、赤 外線光パルスを発しセラミックボート4bの側面で反射した赤外線光パルスを受 けるレーザー18が設けられている。この受け取られた赤外線光パルスはレーザ ー18のフォトダイオードに達し、この赤外線光パルスを電気信号に変換する。 この電気信号により赤外線光パルスがレーザー18からセラミックボート4bま での及びレーザー18に戻るまでの時間、従ってセラミックボート4bの案内軌 道3におけるレーザー18の基準点14からの距離が求められる。この基準点1 4は、通過トンネル2の端部、即ち側面の取出し口6が存在する端部における案 内軌道3の縁である。 さらに、エンコーダ12及びフォトダイオードを備えたレーザー18並びに例 えば熱電対19からなる温度センサの制御に関係して駆動電動機11を制御する 電子制御器20が設けられている。熱電対19は通過トンネル2の両基準点13 、14の間に配置されている。 電子制御器20は、エンコーダ12により測定された、案内軌道3の上にある 列のセラミックボート4の始めのセラミックボート4aの基準点13からの距離 L1と、前記のセラミックボート4の列の終わりのセラミックボート4bの基準 点からの距離L3との和が所定値WからΔwだけ偏位しているとき、駆動電動機 11を停止させる。 熱電対19は通過トンネル2の加熱が異なるときにこの値Wの修正を行い、こ のようにして通過トンネル2内のセラミックボートが受ける異なる長さの伸びが 考慮される。 通過トンネル2を備えた連続炉を運転するためには、先ず移送体7が駆動電動 機11により案内軌道上のセラミックボートの運動方向に見て基準点の前にある 初期位置に送られる。 次に側面から挿入口5を通して記載された矢印の方向にセラミックボート4a が案内軌道3に送られる。このセラミックボート4aは案内軌道3の長手方向に 見て、既に案内軌道にあるセラミックボート4及び4bと同じ長さを持っている 。さらにこのセラミックボート4aの長さはエンコーダ12からなる第一の距離 検出器の測定範囲よりも、そしてレーザー18を備える第二の距離検出器の測定 範囲よりも短い。セラミックボート4a、4及び4bの長さも案内軌道3の長手 方向に見て両基準点13及び14相互の距離よりも短い。 次に駆動電動機11が送り方向に回転するように再び投入される。移送体7は 送りチェーン8により案内軌道3上をレーザー18の方向に向かって送られる。 その場合移送体7は案内軌道3に一列に配置されている全体のセラミックボート 4をレーザー18の方向に移動させる。セラミックボート4bが取出し口6に達 すると、駆動電動機11は遮断され、このセラミックボート4bは側面から取出 し口6を通して通過トンネル2からそこに記入されている矢印に応じて取り出さ れる。その後同じ動作が始めから行われる。 セラミックボートの案内軌道上の移動の際に、例えば図3に示されるように、 2つのセラミックボート4に上向きの反り返りが起こると、距離L1とL3との 和がもはや所定の値Wと一致しなくなるので、駆動電動機11は直ちに遮断され る。これにより連続炉のそして特にその通過トンネルの加熱要素の損傷が、この セラミックボート4が電気的に導通性でない場合でも回避される。Detailed Description of the Invention Continuous furnace The invention is directed to a longitudinally heatable passage tunnel and a furnace passage for Equipped with a guide track and a safety device to detect the warp of the furnace passage on this guide track Regarding continuous furnace. Such a continuous furnace is disclosed in DE-A-2757700. Is known from The guideways for the passage of the furnace consist of metal of the same length in a row A transfer boat is arranged, and this boat passes through the continuous orbit in order on this guide track. Transported through the flannel. The guideway is at least in front of the entrance of the passage tunnel It consists of metal and has an electrical resistance between this metal part and the heating element on the wall of the passage tunnel. The measuring device is connected. A transfer boat made of metal is inside the passage tunnel of the continuous furnace. Curling while moving through the section creates a short circuit between the transfer boat and the heating element. The resistance measuring device immediately stops the transfer device of the transfer boat. This allows continuous furnace In particular, damage to the heating elements is avoided. An object of the present invention is to further improve this known continuous furnace so that a transfer boat can pass through it. For example, the transfer boat does not consist of metal, but rather warps in the tunnel. Even if it consists of an electrically non-conductive material such as ceramics, it should be monitored. To enable and. In order to solve this problem, in a continuous furnace of the kind mentioned at the outset, the invention Then the first distance detector is seen in the passage tunnel and in the direction of this and the passage tunnel. A second distance detector is placed at an interval, and the first distance detector guides the trajectory. From the first reference point on the guide track belonging to the first distance detector of the measured object above Is the second distance detector, and the second distance detector The distance from the second reference point on the guide track belonging to the separation detector is obtained, and The reference points are spaced from each other. It consists of boats of the same length in which the reactor passages are arranged in a row, and the length of the boat is measured at both distances. One boat is always the first distance detector if it is less than the distance between the origin points of the generator. Exactly the same as another boat passing the reference point of the second distance detector at the reference point of the output device. It is always checked whether the distance has passed. This is because the device is operating normally Indicates that However, one of the boats uses the first distance detector reference point as the other. At the moment the boat passed more than the second distance detector reference point, It was shown that the boat was warped between the two reference points, which resulted in the boat passing through the continuous furnace. Driving through the tunnel is interrupted to clear the anomaly. Claims 2 to 4 show favorable embodiments of the continuous furnace according to claim 1. The invention and its advantages are explained in more detail in an exemplary embodiment with reference to the drawing. FIG. 1 schematically shows a passage tunnel of a continuous furnace according to the present invention, 2 schematically shows a range transmitter in a passage tunnel according to FIG. FIG. 3 shows a perspective view of a guide track in the passing tunnel according to FIG. The passage tunnel 2 shown in FIG. 1 is equipped with a guideway 3 for a ceramic boat 4. Well, the boats have the same length and are arranged in a line on the guideway 3. . The ceramic boat 4 is for mounting a sintered material, for example. Passing The panel 2 is further provided with an electric heating element, which is shown in FIG. Not. At the entrance end of the passage tunnel 2, there is a side insertion opening 5 at the other end, i.e., this passage. A side exit 6 is provided at the exit end of the tunnel 2. At the entrance end of the passage tunnel 2, two feed chains 8 are further provided on the guide track 3. A transfer body 7 is provided. Each of the two feed chains 8 has teeth of a gear 9. The faces are each engaged. Both gears 9 are fitted on the drive shaft 10 of the drive motor 11. I have. An encoder 12 is further attached to the drive shaft 10 as a first distance detector. The reference point of the guide track 3 to which it belongs is the end of the guide track 3 where the lateral insertion slot is located. It is the edge 13 of the part. The encoder 12 is in contact with one ceramic boat 4a The side surface of the transfer body 7, and thus the distance between the ceramic boat 4a itself and the reference point 13 is detected. Put out. As shown in FIG. 2, the encoder 12 is concentrically fixed to the drive shaft 10 for mounting. It has a segmented disc 24 which is worn. The segment disc 24 is It comprises a large number of circular cord rows 15 arranged concentrically and having different radii. each The code row 15 includes a light source 16 on one side of the segment disc 24 and a cord on the other side. Each has a light barrier with a photodiode 17 corresponding to the light source 16 of ing. It is attached to the corresponding code string in the code pattern of each code string 15. The light rays of the light barrier passing through the segment disc 24. For each angular position of the drive shaft 10 and thus of the segment disc 24, the encoder 12 Irrespective of the rotation direction of the drive shaft 10, a unique signal is issued, and this signal is used to drive the drive shaft. Of the ceramic boat 4a which is in contact with the transport body 7 The distance from the reference point 13 is read. At the other end of the guideway 3 and thus the passing tunnel 2, another distance detector, red The infrared light pulse emitted from the outside line and reflected from the side surface of the ceramic boat 4b is received. A laser 18 is provided. This received infrared light pulse is a laser It reaches the photodiode at −18 and converts this infrared light pulse into an electric signal. This electrical signal causes an infrared light pulse from the laser 18 to the ceramic boat 4b. At the time of returning to the laser 18, and thus the guide rail of the ceramic boat 4b. The distance of the laser 18 from the reference point 14 on the road 3 is determined. This reference point 1 4 is a plan at the end of the passage tunnel 2, that is, at the end where the side exit 6 exists. It is the edge of the inner orbit 3. Furthermore, a laser 18 with an encoder 12 and a photodiode and an example For example, the drive motor 11 is controlled in relation to the control of the temperature sensor including the thermocouple 19. An electronic controller 20 is provided. The thermocouple 19 is at both reference points 13 of the passage tunnel 2. , 14 between them. The electronic controller 20 is on the guide track 3, measured by the encoder 12. Distance from the reference point 13 of the first ceramic boat 4a of the row of ceramic boats 4a Reference of L1 and ceramic boat 4b at the end of the row of ceramic boats 4 described above When the sum of the distance from the point and the distance L3 deviates from the predetermined value W by Δw, the drive motor Stop 11. The thermocouple 19 corrects this value W when the passing tunnel 2 is heated differently. In this way, the different lengths of elongation that the ceramic boat in the passing tunnel 2 receives Be considered. In order to operate the continuous furnace equipped with the passage tunnel 2, first, the transfer body 7 is driven and driven. It is in front of the reference point as seen in the moving direction of the ceramic boat on the guide track by the machine 11. It is sent to the initial position. Next, the ceramic boat 4a is inserted from the side in the direction of the arrow described through the insertion port 5. Is sent to the guide track 3. This ceramic boat 4a is arranged in the longitudinal direction of the guide track 3. Look, it has the same length as the ceramic boats 4 and 4b already on the guideway. . Further, the length of the ceramic boat 4a is the first distance composed of the encoder 12. Measurement of the second range detector with laser 18 rather than the measuring range of the detector Shorter than range. The length of the ceramic boats 4a, 4 and 4b is also the length of the guide track 3. It is shorter than the distance between the reference points 13 and 14 when viewed in the direction. Next, the drive motor 11 is turned on again so as to rotate in the feed direction. The carrier 7 It is fed on the guide track 3 in the direction of the laser 18 by the feed chain 8. In that case, the transport bodies 7 are arranged on the guide track 3 in a row and the entire ceramic boat is arranged. 4 is moved in the direction of the laser 18. Ceramic boat 4b reaches outlet 6 Then, the drive motor 11 is cut off, and the ceramic boat 4b is taken out from the side surface. Take it out from the passage tunnel 2 through the opening 6 according to the arrow written there. It is. After that, the same operation is performed from the beginning. When the ceramic boat moves on the guide track, for example, as shown in FIG. When the two ceramic boats 4 warp upward, the distance between the distances L1 and L3 is increased. Since the sum no longer matches the predetermined value W, the drive motor 11 is immediately switched off. You. This causes damage to the heating elements of the continuous furnace and especially of its passing tunnel It is avoided even if the ceramic boat 4 is not electrically conductive.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4340220.8 | 1993-11-25 | ||
DE4340220 | 1993-11-25 | ||
PCT/DE1994/001344 WO1995014900A1 (en) | 1993-11-25 | 1994-11-14 | Continuous furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09505662A true JPH09505662A (en) | 1997-06-03 |
JP3573210B2 JP3573210B2 (en) | 2004-10-06 |
Family
ID=6503447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51473895A Expired - Lifetime JP3573210B2 (en) | 1993-11-25 | 1994-11-14 | Continuous furnace |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0730723B1 (en) |
JP (1) | JP3573210B2 (en) |
DE (1) | DE59407752D1 (en) |
WO (1) | WO1995014900A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003028632A (en) * | 2001-07-16 | 2003-01-29 | Dainippon Printing Co Ltd | Warpage measuring instrument and baking apparatus using the same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE560097A (en) * | ||||
DE2402369C2 (en) * | 1974-01-18 | 1975-06-12 | Robert 6312 Laubach Friedrichs | Method and implementation arrangement for distance monitoring when transporting objects through long straight tunnels |
DE4120216A1 (en) * | 1991-06-19 | 1992-12-24 | Aichelin Gmbh | Position determn. of workpieces passing through tunnel furnace - measuring relationships of set positions to proximity sensors at entry and exit |
-
1994
- 1994-11-14 EP EP95900079A patent/EP0730723B1/en not_active Expired - Lifetime
- 1994-11-14 DE DE59407752T patent/DE59407752D1/en not_active Expired - Lifetime
- 1994-11-14 JP JP51473895A patent/JP3573210B2/en not_active Expired - Lifetime
- 1994-11-14 WO PCT/DE1994/001344 patent/WO1995014900A1/en active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003028632A (en) * | 2001-07-16 | 2003-01-29 | Dainippon Printing Co Ltd | Warpage measuring instrument and baking apparatus using the same |
JP4605948B2 (en) * | 2001-07-16 | 2011-01-05 | 大日本印刷株式会社 | Warpage measuring apparatus and firing apparatus using the same |
Also Published As
Publication number | Publication date |
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DE59407752D1 (en) | 1999-03-11 |
EP0730723B1 (en) | 1999-01-27 |
WO1995014900A1 (en) | 1995-06-01 |
EP0730723A1 (en) | 1996-09-11 |
JP3573210B2 (en) | 2004-10-06 |
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