JPS62218511A - Walking hearth type heating furnace - Google Patents

Walking hearth type heating furnace

Info

Publication number
JPS62218511A
JPS62218511A JP6173086A JP6173086A JPS62218511A JP S62218511 A JPS62218511 A JP S62218511A JP 6173086 A JP6173086 A JP 6173086A JP 6173086 A JP6173086 A JP 6173086A JP S62218511 A JPS62218511 A JP S62218511A
Authority
JP
Japan
Prior art keywords
billets
heating furnace
hearth
walking
walking hearth
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
Application number
JP6173086A
Other languages
Japanese (ja)
Other versions
JPH0772291B2 (en
Inventor
Hisao Inoue
久雄 井上
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel 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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP61061730A priority Critical patent/JPH0772291B2/en
Publication of JPS62218511A publication Critical patent/JPS62218511A/en
Publication of JPH0772291B2 publication Critical patent/JPH0772291B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)

Abstract

PURPOSE:To provide a titled heating furnace which can prevent the self-rolling of billets by upward camber and bending by providing turn-over positioning parts of the billets when the difference between the upper and lower temps. of the billets under conveyance in a walking hearth attains a specific value at plural points in the conveying direction. CONSTITUTION:The top firing type heating furnace 1 in which the billets 14 are passed is internally disposed and provided with the walking hearth 12 for conveying the billets 14 charged into the furnace from an inlet 7 toward a discharge port 10. The billets 14 passing in the above-mentioned walking hearth 12 arrive at the billet turn-over positioning part 15 and the difference between the upper and lower temps. of the billets 14 attains approximately 60 deg.C, then the billets 14 are turned over 180 deg. in this state. The positioning parts 15 are preferably provided at 2-6 points. Namely, the temp. difference of the billets 14 is corrected at every arrival at the above-mentioned positioning parts 15, by which the self-rolling of the billets 14 by upward camber and bending generated heretofore is prevented.

Description

【発明の詳細な説明】 本願発明は次に述べる問題点の解決を目的とする。[Detailed description of the invention] The present invention aims to solve the following problems.

(産業上の利用分野) この発明は固定ハースと、可動
ハースとから成るウオーキングハースを備える1焚式加
熱炉を用いて鋼片を加熱するに用いるウオーキングハー
ス式加熱炉に関するものである。
(Industrial Application Field) The present invention relates to a walking hearth type heating furnace used for heating steel slabs using a single-firing type heating furnace equipped with a walking hearth consisting of a fixed hearth and a movable hearth.

(従来の技術) この種の上焚式加熱炉内においてウオ
ーキングハースを用いて鋼片を搬送していると、鋼片の
上側が、下側に比較して早く昇温する。そして第11.
12図に示す如く鋼片は弓状に上反り曲り、搬送方向に
自から転動する事がある。この転勤により、鋼片は装入
時の整列状態とは異なる乱れた状態となり、出口におけ
る自動抽出作業を困難にする問題点があった。
(Prior Art) When a steel billet is transported using a walking hearth in this type of top-firing heating furnace, the temperature of the upper side of the steel billet rises faster than that of the lower side. And the 11th.
As shown in Fig. 12, the steel piece may bend upward in an arched shape and roll from itself in the conveying direction. As a result of this transfer, the steel billet becomes in a disordered state different from the aligned state at the time of charging, which poses a problem that makes automatic extraction work at the exit difficult.

(発明が解決しようとする問題点) この発明は上記従
来の問題点を除き、装入時の整列状態に近い整然とした
状態で出口に向かい鋼片出口での自動抽出作業を容易に
するよう構成したウオーキングハース式加熱炉を提供し
ようとするものである。
(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems and is configured to facilitate the automatic extraction operation at the exit of the billet toward the exit in an orderly state similar to the arrangement state at the time of charging. The present invention aims to provide a walking hearth-type heating furnace.

本願発明の構成は次の通りである。The configuration of the present invention is as follows.

(問題点を解決する為の手段) 本願発明は前記請求の
範囲記載の通りの手段を講じたものであってその作用は
次の通りである。
(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(作用) ウオーキングハースにあっては、夫々搬送途
中の鋼片における上下の温度差が略60℃になった状態
でこれを180度反転させるようにした鋼片反転位置決
め部を、搬送方向に複数個所備えさせたので、鋼片は自
から転動する前に反転せられて上下の温度差は修正され
、上記弓状の上反り曲りが発生しない。
(Function) In the walking hearth, a plurality of steel billet inversion positioning units are installed in the conveyance direction, each of which rotates the steel billet by 180 degrees when the temperature difference between the upper and lower sides of the steel billet during conveyance reaches approximately 60°C. Since the steel piece is provided at a certain position, the steel piece is turned over before rolling from itself, and the temperature difference between the upper and lower sides is corrected, and the above-mentioned bow-like upward bending does not occur.

(実施例)以下本願の実施例を示す図面について説明す
る。第1図において符号1〜14で示される部材は、こ
の種のウオーキングハース式加熱炉において周知のもの
であるが、一応簡単に説明する。
(Embodiments) The drawings showing the embodiments of the present application will be explained below. The members indicated by reference numerals 1 to 14 in FIG. 1 are well known in this type of walking hearth type heating furnace, but will be briefly explained.

1は加熱炉を示し、2,3.4は順に予熱帯、加熱帯、
均熱帯、5は上焚式におけるバーナ位置を例示しており
、6は排出口、7は鋼片14の入口を示し、8はシフト
ブツシャ、9は装入用ローラ、10は鋼片出口を示し、
11は抽出ローラを示す。12はウオーキングハースを
示し、次回以降に示される固定ハース16と、可動ハー
ス17とが並設状態で構成されている。13は固定ハー
スを支持する部材と、可動ハースを支持し、かつ駆動す
る部材の存在位置を示す。上記ウオーキングハース式加
熱炉は一例を略式したものであるが、本件においては他
の構成のウオーキングハース式加熱炉においても、ウオ
ーキングハースが存在すれば実施できる。
1 indicates a heating furnace, 2, 3.4, in order, a preheating zone, a heating zone,
In the soaking zone, 5 indicates the burner position in the top firing type, 6 indicates the discharge port, 7 indicates the inlet of the billet 14, 8 indicates the shift button, 9 indicates the charging roller, and 10 indicates the billet outlet. ,
11 indicates an extraction roller. Reference numeral 12 denotes a walking hearth, which is composed of a fixed hearth 16 and a movable hearth 17, which will be shown next time, and a movable hearth 17 arranged side by side. Reference numeral 13 indicates the locations of members that support the fixed hearth and members that support and drive the movable hearth. The above-mentioned walking hearth type heating furnace is a simplified example, but in this case, the present invention can be implemented in a walking hearth type heating furnace of other configurations as long as a walking hearth is present.

次に15はウオーキングハースの一部に存在させるべき
、鋼片反転位置決め部の設定場所を例示する。この場所
は次のような事情を考慮して定めるとよいが、その数は
2〜6箇所がよい。まず第1図に示される加熱炉におけ
る炉温と、鋼片14の上下の温度差の関係は、第1図の
下方に図示されている第2図でもって表示する関係にな
るので、第1図と第2図との位置関係に注意されたい。
Next, reference numeral 15 exemplifies the setting location of a steel piece reversal positioning part that should be present in a part of the walking hearth. This location should be determined by considering the following circumstances, but the number should preferably be 2 to 6. First, the relationship between the furnace temperature in the heating furnace shown in FIG. 1 and the temperature difference between the top and bottom of the steel billet 14 is the relationship shown in FIG. 2 shown at the bottom of FIG. Please note the positional relationship between this figure and FIG. 2.

即ち、加熱炉内の炉温は入ロアから出口10に向かうに
従って第2図のように変化する。また鋼片の上下温度差
は加熱時間との関係で第2図のようになる。
That is, the furnace temperature inside the heating furnace changes as shown in FIG. 2 from the entrance lower toward the exit 10. Further, the temperature difference between the upper and lower sides of the steel piece is shown in FIG. 2 in relation to the heating time.

上記の場合、鋼片反転位置決め部15において鋼片を反
転させないと仮定すると第2図の破線で示す温度関係と
なり、鋼片の上下の温度差は大きく、第11.12図の
如く反り曲り、自転動する恐れがある。しかし、鋼片反
転位置決め部で反転させると第2図の実線で示す温度関
係となり、上下温度差は少なく反り曲りは少なく、自転
動の危険はない。なお上記の上反りの現象は、鋼片の断
面積、長さ、材質によって種々異なる。鋼片の上下の温
度差が100℃でも転勤を生じないものもあるが、温度
差を60℃に抑えておけば、転がりは生じない。さらに
鋼湯が750℃以上になると上反りは生じ酵くなる。
In the above case, assuming that the steel billet is not reversed in the billet reversal positioning section 15, the temperature relationship will be as shown by the broken line in FIG. There is a risk of rotation. However, when the steel billet is reversed at the reversing and positioning section, the temperature relationship becomes as shown by the solid line in FIG. 2, and there is little difference in temperature between the top and bottom, there is little warping, and there is no risk of rotation. Note that the above-mentioned phenomenon of upward warpage varies depending on the cross-sectional area, length, and material of the steel piece. Some pieces of steel do not roll even if the temperature difference between the top and bottom is 100°C, but if the temperature difference is kept to 60°C, rolling will not occur. Furthermore, if the temperature of the steel hot water exceeds 750°C, it will warp and become fermented.

次に第3図〜第6図を用いて綱片を反転させる為の鋼片
反転位置決め部の機構の例を説明する。
Next, an example of the mechanism of the steel piece reversal positioning unit for reversing the steel piece will be explained using FIGS. 3 to 6.

符号161〜169は固定ハース16の上面を示し、1
71〜176は可動ハース17における上面を示す。可
動ハース17は第6図に符号18〜21で示されるよう
な動きを1サイクルとして繰返しており、これの動きに
よって綱片14(A−F材)は矢印19方向に次々と動
く (図示の動き巾は、例えばリフト18を200 m
とし、トラベル19を280fiとしている)。
Reference numerals 161 to 169 indicate the upper surface of the fixed hearth 16;
71 to 176 indicate the upper surface of the movable hearth 17. The movable hearth 17 repeats the movements shown by reference numerals 18 to 21 in FIG. For example, the movement width of the lift 18 is 200 m.
(and Travel 19 is set to 280fi).

従って第3図から第6図の順に可動ハースを動作させる
と、例えばC材は第3図から第4図の間で斜面172に
乗り、ストッパ173の存在によって位置決め(修正)
される。次に第5図では角部164の上方にあり、矢印
20方向に下降することにより、斜面165に移り、図
示の如く90度倒れて受面167に乗る。その後は順に
D材、E材の場所に移る。
Therefore, when the movable hearth is operated in the order from FIG. 3 to FIG. 6, material C, for example, rides on the slope 172 between FIG. 3 and FIG.
be done. Next, in FIG. 5, it is above the corner 164, and by descending in the direction of arrow 20, it moves to the slope 165, and as shown, it falls 90 degrees and rides on the receiving surface 167. After that, move to material D and material E in order.

さらにその先に、第3〜6図と同様の構造があると、C
材を含む全ての鋼片はさらに90度転び、結局180度
反転することになる。
Further beyond that, if there is a structure similar to that shown in Figures 3 to 6, C
All the pieces of steel, including the material, are rolled another 90 degrees, and end up being flipped 180 degrees.

次に第7〜第10図に示す例は綱片14eを180度反
転させる別の構成を示すものである。即ち、A材は1サ
イクルで90度転動する。そして次のその次の1サイク
ル(C材の位置)でさらに90度転動する。
Next, the example shown in FIGS. 7 to 10 shows another configuration in which the rope piece 14e is reversed by 180 degrees. That is, material A rotates 90 degrees in one cycle. Then, in the next cycle (at the position of material C), it rolls another 90 degrees.

なお、機能上第3図〜第6図のものと同−又は均等構成
と考えられる部分には、前回と同一の符号にアルファベ
ットのeを付して重複する説明を省略した。
It should be noted that the parts that are considered to have the same or equivalent structure as those shown in FIGS. 3 to 6 in terms of function are given the same reference numerals and the letter "e" as in the previous section, and redundant explanations are omitted.

(発明の効果) 以上のように本発明にあっては、上焚
式加熱炉内において、固定ハースと、可動ハースとから
成るウオーキングハースによって、従来の場合と同様に
鋼片を搬送しながら上記の鋼片を加熱することができる
は勿論のこと、搬送途中において上記鋼片の上部側が下
部側に比較して大きく昇温する状況になっても、上記鋼
片は搬送途中でもって、複数個所に設けられている鋼片
反転位置決め部において反転し、上下の温度差はその都
度修整され、その結果、従来発生していた上反り曲りに
よる鋼片の自からの転勤は防止される効果がある。この
ことは加熱炉の抽出端での自動抽出作業の可能性を高め
る有益性を生みだす。
(Effects of the Invention) As described above, in the present invention, in a top-firing heating furnace, a walking hearth consisting of a fixed hearth and a movable hearth is used to transport a steel billet as in the conventional case. Not only can the steel billet be heated at multiple locations during transportation, but even if the upper side of the steel billet rises in temperature significantly compared to the lower side during transportation, the steel billet can be heated at multiple locations during transportation. The steel billet is reversed at the steel billet reversal positioning unit installed in the steel billet, and the temperature difference between the upper and lower sides is corrected each time.As a result, the steel billet is prevented from being transferred from itself due to upward curvature, which conventionally occurs. . This creates the advantage of increasing the possibility of automatic brewing operations at the brewing end of the furnace.

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

図面は本願の実施例を示すもので、第1図は従来例のウ
オーキングハース式加熱炉を利用して鋼片反転位置決め
部の位置を表示した縦断面図、第2図は温度と加熱時間
の関係を示すグラフ、第3図〜第6図は鋼片反転位置決
め部における動作を示す説明図、第7図〜第10図は他
の動作例を示す説明図、第11図と第12図は綱片の上
反り曲りを示す正面図と斜視図。 1・・・加熱炉、12・・・ウオーキングハース、14
・・・鋼片、15・・・鋼片反転位置決め部。
The drawings show an embodiment of the present application. Fig. 1 is a longitudinal sectional view showing the position of the reversing positioning part of the steel billet using a conventional walking hearth type heating furnace, and Fig. 2 shows the temperature and heating time. Graphs showing the relationship, Figures 3 to 6 are explanatory diagrams showing the operation in the steel billet reversal positioning section, Figures 7 to 10 are explanatory diagrams showing other operation examples, and Figures 11 and 12 are The front view and the perspective view which show the upward curve of the rope piece. 1... Heating furnace, 12... Walking hearth, 14
... Steel piece, 15... Steel piece reversal positioning part.

Claims (1)

【特許請求の範囲】[Claims] 一方に鋼片の入口を備え、他方に鋼片の出口を備える上
焚式加熱炉内には、上記入口から装入される鋼片を上記
出口に向けて搬送するように構成してあるウォーキング
ハースを配設具備させてあるウォーキングハース式加熱
炉において、上記ウォーキングハースにあっては、夫々
搬送途中の鋼片における上下の温度差が略60℃になっ
た状態でこれを180度反転させるようにした鋼片反転
位置決め部を、搬送方向に複数個所備えさせたことを特
徴とするウォーキングハース式加熱炉。
A top-fired heating furnace equipped with a steel billet inlet on one side and a steel billet outlet on the other side has a walking mechanism configured to transport the steel billets charged from the inlet toward the outlet. In a walking hearth type heating furnace equipped with a hearth, the above-mentioned walking hearth is designed to invert the steel billets by 180 degrees when the temperature difference between the top and bottom of each steel billet during transportation reaches approximately 60 degrees Celsius. A walking hearth type heating furnace characterized in that a plurality of steel billet reversal positioning sections are provided in the conveying direction.
JP61061730A 1986-03-19 1986-03-19 Walking hearth type upper heating furnace Expired - Lifetime JPH0772291B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61061730A JPH0772291B2 (en) 1986-03-19 1986-03-19 Walking hearth type upper heating furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61061730A JPH0772291B2 (en) 1986-03-19 1986-03-19 Walking hearth type upper heating furnace

Publications (2)

Publication Number Publication Date
JPS62218511A true JPS62218511A (en) 1987-09-25
JPH0772291B2 JPH0772291B2 (en) 1995-08-02

Family

ID=13179617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61061730A Expired - Lifetime JPH0772291B2 (en) 1986-03-19 1986-03-19 Walking hearth type upper heating furnace

Country Status (1)

Country Link
JP (1) JPH0772291B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001316721A (en) * 2000-05-02 2001-11-16 Nippon Steel Corp Walking hearth type heating furnace
JP2009052863A (en) * 2007-08-29 2009-03-12 Ngk Insulators Ltd Heat treatment furnace

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5315206A (en) * 1976-07-28 1978-02-10 Ishikawajima Harima Heavy Ind Co Ltd Turning over apparatus for steel pieces

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5315206A (en) * 1976-07-28 1978-02-10 Ishikawajima Harima Heavy Ind Co Ltd Turning over apparatus for steel pieces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001316721A (en) * 2000-05-02 2001-11-16 Nippon Steel Corp Walking hearth type heating furnace
JP2009052863A (en) * 2007-08-29 2009-03-12 Ngk Insulators Ltd Heat treatment furnace

Also Published As

Publication number Publication date
JPH0772291B2 (en) 1995-08-02

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