JP3178650B2 - Cooling roller for steel tube heat treatment furnace - Google Patents
Cooling roller for steel tube heat treatment furnaceInfo
- Publication number
- JP3178650B2 JP3178650B2 JP08103796A JP8103796A JP3178650B2 JP 3178650 B2 JP3178650 B2 JP 3178650B2 JP 08103796 A JP08103796 A JP 08103796A JP 8103796 A JP8103796 A JP 8103796A JP 3178650 B2 JP3178650 B2 JP 3178650B2
- Authority
- JP
- Japan
- Prior art keywords
- roller
- heat treatment
- steel pipe
- temperature
- treatment 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
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Articles (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、加熱炉や均熱炉
等の熱処理炉において、鋼管を熱処理炉に装入あるいは
熱処理炉から抽出する冷却式ローラに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling roller for charging a steel pipe to a heat treatment furnace or extracting the steel pipe from the heat treatment furnace in a heat treatment furnace such as a heating furnace or a soaking furnace.
【０００２】[0002]
【従来の技術】連続式に熱処理を行う加熱炉や均熱炉等
の熱処理炉内には、被熱処理材の装入、抽出あるいは炉
内移動用として多数の耐熱ローラが備えられたものが多
くある。この熱処理炉内のロールには、耐熱性が要求さ
れるところから、従来耐熱鋼を主体とする金属ローラあ
るいはセラミックス製ローラが多くもちいられている
が、ローラ表面に被熱処理材のスケールが付着堆積（以
下これをビルドアップという）を起こしたり、被熱処理
材とローラ表面との間で焼付きを起こし、被熱処理材の
表面に疵をつけるという欠点を有している。例えば、図
６に示すとおり、鋼管の熱処理炉の抽出ローラ６１は、
鼓型で鋼管６２と抽出ローラ６１との接触点６３にビル
ドアップ６４が発生する。2. Description of the Related Art Many heat treatment furnaces, such as heating furnaces and soaking furnaces, which perform heat treatment in a continuous manner, are equipped with a number of heat-resistant rollers for charging, extracting, or moving the inside of the furnace. is there. Conventionally, metal rollers or heat-resistant ceramic rollers mainly made of heat-resistant steel are often used for the rolls in this heat treatment furnace because heat resistance is required. (Hereinafter referred to as build-up), and seizure occurs between the material to be heat-treated and the roller surface, resulting in flaws on the surface of the material to be heat-treated. For example, as shown in FIG. 6, the extraction roller 61 of the heat treatment furnace for steel pipes
A build-up 64 occurs at a contact point 63 between the steel pipe 62 and the extraction roller 61 in a drum shape.
【０００３】特に近年においては、高温の熱処理を必要
とするステンレス鋼管等の高合金鋼鋼管を熱処理する熱
処理炉が多くなり、被熱処理材ならびにローラ共により
高温にさらされるため、前記ビルドアップ、焼付き等の
発生が多発し、大きな問題となっている。Particularly in recent years, the number of heat treatment furnaces for heat treating high alloy steel pipes such as stainless steel pipes requiring high temperature heat treatment has increased, and the materials to be heat treated and the rollers are exposed to high temperatures. Occurrence of sticking etc. occurs frequently, which is a major problem.
【０００４】従来、熱処理炉における前記ビルドアッ
プ、焼付き等の発生を防止する方法としては、ローラ表
面もしくはローラ本体の材質（化学成分）を様々に変化
させることによリ、被熱処理材とローラとの化学反応に
よるビルドアップ現象を抑制する提案が多く行われてい
る。しかし、これらの方法は、ローラ表面処理を施して
実際に熱処理炉内ローラとして使用したところ、多少ビ
ルドアップは抑制されるものの、まだ完全に無くならな
いばかりでなく、ローラ製作コストのかかる割には、疵
手入れは必要であるということが判明した。Conventionally, as a method of preventing the occurrence of the build-up, seizure, and the like in a heat treatment furnace, the material to be heat-treated and the roller are changed by variously changing the material (chemical composition) of the roller surface or the roller body. Many proposals have been made to suppress build-up phenomena caused by a chemical reaction with the compound. However, when these methods are used as rollers in a heat treatment furnace after applying a roller surface treatment, although build-up is somewhat suppressed, not only is it not completely eliminated yet, but the roller manufacturing cost is high. It turned out that flaw care was necessary.
【０００５】この原因としては、ローラ表面にスケール
が付着堆積を起こす理由が、化学反応によるスケール付
着、すなわちビルドアップのみであると判断していたこ
とにある。この他には、被熱処理材とローラ表面との間
の焼付きという問題があり、ローラ表面処理のみでは対
応できないのである。この問題を解決する手段として
は、冷却式ローラが提案されている。[0005] The reason for this is that it has been determined that the reason why the scale adheres and accumulates on the roller surface is scale adhesion due to a chemical reaction, that is, only build-up. In addition to this, there is a problem of seizure between the material to be heat-treated and the roller surface, and the roller surface treatment alone cannot cope with the problem. As means for solving this problem, a cooling roller has been proposed.
【０００６】例えば、図８に示すとおり、ローラ本体８
１を回転させる回転軸８２中心部に冷却水８３を供給
し、回転軸８２の外周内面に沿って流出させる軸水冷型
ローラ、あるいは図９に示すとおり、ローラ本体９１に
冷却水通路９２を形成し、回転軸９３を介して冷却水９
４を矢印のように給排水する水冷型ローラが知られてい
る。For example, as shown in FIG.
A shaft water-cooled roller that supplies cooling water 83 to the center of a rotating shaft 82 that rotates the shaft 1 and flows out along the inner peripheral surface of the rotating shaft 82, or forms a cooling water passage 92 in a roller body 91 as shown in FIG. And the cooling water 9 via the rotating shaft 93.
There is known a water-cooled roller for supplying and discharging water 4 as indicated by an arrow.
【０００７】[0007]
【発明が解決しようとする課題】上記軸水冷型ローラ
は、回転軸のみの冷却であるため、ローラ表面温度が高
く、被熱処理材および炉内雰囲気温度に及ぼす影響が小
さいが、ビルドアップならびに焼付き防止効果は十分で
はない。また、水冷型ローラは、被熱処理材とローラ間
での焼付きはなくなったものの、図７に示すとおり、抽
出ローラ７１表面温度をビルドアップが生じない２００
〜３００℃とかなり低い温度範囲まで冷却するため、ウ
オーキングビーム７２上の被熱処理材７３に対面するロ
ーラ端面７４からの抜熱が特に大きく、ウオーキングビ
ーム７２上の被熱処理材７３および炉内雰囲気温度に大
きく影響を及ぼし、熱処理炉として正確な熱処理を行え
ないという問題が発生している。Since the shaft water-cooled roller is cooled only by the rotating shaft, the roller surface temperature is high and the influence on the material to be heat treated and the atmosphere temperature in the furnace is small. The effect of preventing sticking is not sufficient. Further, in the water-cooled roller, the seizure between the heat-treated material and the roller is eliminated, but as shown in FIG.
In order to cool to a very low temperature range of about 300 ° C., the heat removal from the roller end face 74 facing the heat-treated material 73 on the walking beam 72 is particularly large, and the heat-treated material 73 on the walking beam 72 and the furnace atmosphere temperature , And a problem that accurate heat treatment cannot be performed as a heat treatment furnace has occurred.
【０００８】この発明の目的は、上記水冷型ローラの欠
点を解消し、ビルドアップならびに焼付きを防止できる
と共に、被熱処理材および炉内雰囲気温度に及ぼす影響
が小さい鋼管熱処理炉用冷却式ローラを提供することに
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling roller for a steel pipe heat treatment furnace which can solve the above-mentioned drawbacks of the water-cooled roller, can prevent build-up and seizure, and has a small effect on the material to be heat-treated and the atmosphere temperature in the furnace. To provide.
【０００９】[0009]
【課題を解決するための手段】この発明の請求項１の水
冷型ローラは、ローラ本体の鋼管と接触する中央部に冷
却水通路を形成し、前記中央部と端部間に断熱層を設
け、端面を冷却部から遮断することとしている。このよ
うに、ローラ本体の鋼管と接触する中央部に冷却水通路
を形成することによって、ローラ本体の鋼管と接触する
中央部は、冷却水によって冷却される結果、ローラ中央
部の表面温度をビルドアップが生じない２００〜３００
℃に保持することができ、ビルドアップならびに焼付き
を防止することができる。また、ローラ本体の中央部と
端部間に断熱部を設け、端面を冷却部から遮断すること
によって、ローラ本体の端部は、断熱部によって中央部
の水冷部から遮断され、ローラ本体の端面を被熱処理材
および炉内雰囲気温度への影響を最小限に抑制できる温
度に保持することができ、被熱処理材の部分的な温度低
下を抑制することができる。According to a first aspect of the present invention, there is provided a water-cooled roller in which a cooling water passage is formed in a central portion of the roller body which comes into contact with a steel pipe, and a heat insulating layer is provided between the central portion and an end portion. In addition, the end face is cut off from the cooling section. In this way, by forming the cooling water passage in the central portion of the roller body that contacts the steel pipe, the central portion of the roller body that contacts the steel pipe is cooled by the cooling water, thereby building the surface temperature of the roller central portion. Up is not generated 200-300
° C, and build-up and seizure can be prevented. Also, by providing a heat insulating portion between the center portion and the end portion of the roller main body and blocking the end surface from the cooling portion, the end portion of the roller main body is cut off from the water cooling portion of the central portion by the heat insulating portion, and the end surface of the roller main body is Can be kept at a temperature at which the influence on the material to be heat-treated and the atmosphere temperature in the furnace can be suppressed to a minimum, and a partial temperature drop of the material to be heat-treated can be suppressed.
【００１０】また、この発明の請求項２の水冷型ローラ
は、ローラ本体を鋼管と接触する中央部と端部とに分割
し、前記中央部に冷却水通路を形成すると共に、中央部
と端部間に所定の間隙を設けることとしている。このよ
うに、ローラ本体を鋼管と接触する中央部と端部とに分
割し、前記中央部に冷却水流路を形成することによっ
て、ローラ本体の鋼管と接触する中央部は、冷却水によ
って冷却される結果、ローラ中央部の表面温度をビルド
アップが生じない２００〜３００℃に保持することがで
き、ビルドアップならびに焼付きを防止することができ
る。しかも、中央部と端部間に所定の間隙を設けること
によって、前記間隙を炉内雰囲気ガスが充填するため、
ローラ本体端面は、前記間隙を充填する炉内雰囲気ガス
によって断熱され、ローラ本体の端面を被熱処理材およ
び炉内雰囲気温度への影響を最小限に抑制できる温度に
保持することができ、炉内の被熱処理材の温度低下を抑
制することができる。According to a second aspect of the present invention, in the water-cooled roller, the roller body is divided into a central portion and an end portion that come into contact with the steel pipe, a cooling water passage is formed in the central portion, and the central portion and the end portion are formed. A predetermined gap is provided between the parts. As described above, the roller body is divided into a central portion and an end portion that come into contact with the steel pipe, and a cooling water flow path is formed in the central portion, whereby the central portion of the roller body that comes into contact with the steel pipe is cooled by the cooling water. As a result, the surface temperature of the central portion of the roller can be maintained at 200 to 300 ° C. where no build-up occurs, and build-up and seizure can be prevented. In addition, by providing a predetermined gap between the center and the end, the furnace atmosphere gas fills the gap,
The end face of the roller body is insulated by the furnace atmosphere gas filling the gap, and the end face of the roller body can be maintained at a temperature capable of minimizing the influence on the material to be heat-treated and the furnace atmosphere temperature. Of the material to be heat-treated can be suppressed.
【００１１】[0011]
【発明の実施の形態】この発明の水冷型ローラは、図１
に示すとおり、ローラ本体１の鋼管と接触する中央部２
に冷却水通路３を形成し、ローラ本体１の回転軸４に冷
却水通路３への冷却水供給路５と冷却水通路３からの冷
却水排出路６を形成する。また、前記中央部２と端部７
間には、断熱層８（例えば空気層）を単層あるいは複数
層設け、ローラ端面９を冷却部から遮断する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A water-cooled roller according to the present invention is shown in FIG.
As shown in FIG.
A cooling water passage 3 is formed on the rotating shaft 4 of the roller body 1, and a cooling water supply passage 5 to the cooling water passage 3 and a cooling water discharge passage 6 from the cooling water passage 3 are formed on the rotating shaft 4. Also, the central portion 2 and the end portion 7
A single or a plurality of heat insulating layers 8 (for example, an air layer) are provided between them, and the roller end face 9 is shielded from the cooling unit.
【００１２】また、この発明の水冷型ローラは、図２に
示すとおり、ローラ本体１１を鋼管と接触する中央部１
２と端部１３とに分割し、前記中央部１２に冷却水通路
１４を形成し、ローラ本体１１の回転軸１５に冷却水通
路１４への冷却水供給路１６と冷却水通路１４からの冷
却水排出路１７を形成する。中央部１２と端部１３間に
は、所定の間隙１８を１個あるいは複数設け、ローラ端
面１９を冷却部から遮断する。Further, as shown in FIG. 2, the water-cooled roller according to the present invention has a roller body 11 having a central portion 1 which comes into contact with a steel pipe.
2 and an end portion 13, a cooling water passage 14 is formed in the central portion 12, and a cooling water supply passage 16 to the cooling water passage 14 and a cooling water from the cooling water passage 14 are formed on a rotating shaft 15 of the roller body 11. The water discharge path 17 is formed. One or a plurality of predetermined gaps 18 are provided between the central portion 12 and the end portions 13 to shield the roller end faces 19 from the cooling section.
【００１３】図５に示すとおり、炉内に被処理材５１搬
送用のウオーキングビーム５２を備えたウオーキングビ
ーム型鋼管熱処理炉５３の抽出ローラ５４は、抽出ロー
ラ５４のローラ端面５５が被処理材５１の側部に対面し
ており、抽出ローラ５４のローラ端面５５が過冷却され
ることによって、被処理材５１からの抜熱が特に大き
く、ウオーキングビーム５２上の被熱処理材５１および
炉内雰囲気温度に大きく影響を及ぼすので、この発明の
水冷型ローラの使用に適している。As shown in FIG. 5, an extraction roller 54 of a walking beam type steel pipe heat treatment furnace 53 having a walking beam 52 for transporting a material 51 to be processed in the furnace has a roller end face 55 of the extraction roller 54 in which the material 51 is processed. When the roller end surface 55 of the extraction roller 54 is supercooled, the heat removal from the processing target material 51 is particularly large, and the heat processing target material 51 on the walking beam 52 and the furnace atmosphere temperature Therefore, the water-cooled roller of the present invention is suitable for use.
【００１４】[0014]
実施例１ 公称能力４４Ｔ／Ｈ（外径２４４．５ｍｍ、肉厚１１．
９９ｍｍ、長さ１３０００ｍｍで）の側面装入、側面抽
出の予熱帯、加熱帯、均熱帯からなる長さ１２．３ｍ、
幅１７ｍ、高さ２．９ｍのウオーキングビーム型鋼管熱
処理炉の抽出ローラとして、図８に示す軸水冷型ロー
ラ、図９に示す水冷型ローラおよび図１に示すこの発明
の緩冷却型ローラを使用し、炉温１０８０℃±１０℃、
在炉時間９０ｍｉｎ、ローラ冷却水を流量１２０ｌ／ｍ
ｉｎ（流速１．５ｍ／ｓｅｃ）で供給しつつ、外径２１
８．１ｍｍ、肉厚１６．５ｍｍ、長さ８０００ｍｍのス
テンレス鋼継目無鋼管の連続熱処理を行い、各ローラ本
体の表面温度分布の解析を行った。その結果を図３に示
す。Example 1 Nominal capacity 44 T / H (outer diameter 244.5 mm, wall thickness 11.
99 mm, 13000 mm length) 12.3 m length consisting of side loading, pre-tropical side extraction, heating zone, isotropy
As extraction rollers for a walking beam type steel pipe heat treatment furnace having a width of 17 m and a height of 2.9 m, a shaft water-cooled roller shown in FIG. 8, a water-cooled roller shown in FIG. 9 and a slow cooling roller of the present invention shown in FIG. Furnace temperature 1080 ° C ± 10 ° C,
Roller cooling water flow rate 120 l / m in furnace time 90 min
in (flow rate 1.5 m / sec),
Continuous heat treatment was performed on a stainless steel seamless steel pipe having a thickness of 8.1 mm, a thickness of 16.5 mm, and a length of 8000 mm, and the surface temperature distribution of each roller body was analyzed. The result is shown in FIG.
【００１５】図３に示すとおり、図８に示す軸水冷型ロ
ーラは、胴部表面の温度が６５０〜１０００℃と高く、
ビルドアップ現象はなくならなかったが、端面温度が４
５０〜１０００℃と高いため、ウオーキングビーム上の
継目無鋼管の周方向の熱影響は殆ど認められなかった。
また、図９に示す水冷型ローラは、胴部表面の温度が３
００〜５７０℃と低いため、ビルドアップ現象は認めら
れなかったが、端面温度が２００〜５７０℃と低いた
め、ウオーキングビーム上の継目無鋼管に対する熱影響
が大きく、周方向での機械的性質の不良が懸念された。
これに対し、図１に示すこの発明の緩冷却型ローラは、
継目無鋼管と接触する中央部の胴部表面の温度が１６０
〜３００℃と低いため、ビルドアップ現象は認められ
ず、また、端面温度は９１０℃と高いため、ウオーキン
グビーム上の継目無鋼管の周方向の熱影響は殆ど認めら
れなかった。As shown in FIG. 3, the shaft water-cooled roller shown in FIG. 8 has a high body surface temperature of 650 to 1000 ° C.
The build-up phenomenon did not go away, but the end face temperature was 4
Since the temperature was as high as 50 to 1000 ° C., almost no thermal influence was observed in the circumferential direction of the seamless steel pipe on the walking beam.
Further, the water-cooled roller shown in FIG.
Since the temperature was as low as 00 to 570 ° C, no build-up phenomenon was observed. However, since the end face temperature was as low as 200 to 570 ° C, the thermal effect on the seamless steel pipe on the walking beam was large, and the mechanical properties in the circumferential direction were low. Defects were a concern.
In contrast, the slow cooling roller of the present invention shown in FIG.
The temperature of the central body surface in contact with the seamless steel pipe is 160
Since the temperature was as low as about 300 ° C., no build-up phenomenon was observed, and since the end face temperature was as high as 910 ° C., almost no thermal influence of the seamless steel pipe on the walking beam in the circumferential direction was observed.
【００１６】実施例２ 実施例１と同じウオーキングビーム型鋼管熱処理炉の抽
出ローラとして、図８に示す軸水冷型ローラ、図９に示
す水冷型ローラおよび図１に示すこの発明の緩冷却型ロ
ーラを使用し、炉温１１００℃で、ローラ冷却水を流量
０〜１６０ｌ／ｍｉｎ（流速０〜２．０ｍ／ｓｅｃ）の
範囲で変化させて継目無鋼管の連続熱処理を行い、各ロ
ーラ本体の表面温度分布を解析し、胴部中央部平均温度
と端面平均温度を求めた。その結果を図４に示す。Embodiment 2 As the extraction rollers of the same walking beam type steel pipe heat treatment furnace as in Embodiment 1, a shaft water-cooled roller shown in FIG. 8, a water-cooled roller shown in FIG. 9, and a slow cooling roller of the present invention shown in FIG. And a continuous heat treatment of the seamless steel pipe at a furnace temperature of 1100 ° C. and a flow rate of roller cooling water of 0 to 160 l / min (flow rate of 0 to 2.0 m / sec) is performed. The temperature distribution was analyzed, and the average temperature at the center of the body and the average temperature at the end face were determined. FIG. 4 shows the results.
【００１７】図４に示すとおり、ローラ冷却水量４０ｌ
／ｍｉｎ（流速０．５ｍ／ｓｅｃ）以上で変化させて
も、図８に示す軸水冷型ローラは、胴部表面温度ならび
に端面温度が高く、ウオーキングビーム上の継目無鋼管
の周方向の熱影響は殆ど認められなかったが、ビルドア
ップ現象はなくならなかった。また、図９に示す水冷型
ローラは、胴部表面温度ならびに端面温度が低く、ビル
ドアップ現象は認められなかったが、ウオーキングビー
ム上の継目無鋼管に対する熱影響が大きく、周方向での
機械的性質の不良が懸念された。これに対し、図１に示
すこの発明の緩冷却型ローラは、継目無鋼管と接触する
中央部の胴部表面温度が低く、端面平均温度が高いた
め、ビルドアップ現象は見られず、また、ウオーキング
ビーム上の継目無鋼管の周方向の熱影響は殆ど認められ
なかった。As shown in FIG. 4, the roller cooling water amount is 40 l.
8 (min) (min), the axial water-cooled roller shown in FIG. 8 has a high body surface temperature and end surface temperature, and has a thermal effect in the circumferential direction of the seamless steel pipe on the walking beam. Was hardly recognized, but the build-up phenomenon did not disappear. The water-cooled roller shown in FIG. 9 had a low body surface temperature and end surface temperature, and no build-up phenomenon was observed. However, the water-cooled roller had a large thermal effect on the seamless steel pipe on the walking beam, and had a mechanical effect in the circumferential direction. There was concern about poor properties. On the other hand, the slow cooling type roller of the present invention shown in FIG. 1 has a low body surface temperature at the central portion in contact with the seamless steel pipe and a high average end face temperature, so that no build-up phenomenon is observed. Almost no heat effect in the circumferential direction of the seamless steel pipe on the walking beam was observed.
【００１８】なお、ウオーキングビーム型鋼管熱処理炉
の抽出ローラとして設置されていた前記図９に示す水冷
型ローラに替えて、図１に示すこの発明の水冷型ローラ
を取付け、継目無鋼管の熱処理を実施したところ、継目
無鋼管に熱影響は見られず良好な結果が得られ、従来の
図９に示す水冷型ローラの場合に目標温度±５０℃の操
業での温度バラツキがあったものを、目標温度±１０℃
に低減できることを確認している。また、ビルドアップ
現象は見られなかった。この結果、図９に示す水冷型ロ
ーラに比較し、抽出ローラ１台当たり、１．２６万ｋｃ
ａｌ／ｈｒの省エネルギー効果のあることも確認してい
る。The water-cooled roller of the present invention shown in FIG. 1 is installed in place of the water-cooled roller shown in FIG. 9 which was installed as an extraction roller of the walking beam type steel pipe heat treatment furnace, and heat treatment of the seamless steel pipe is performed. As a result, good results were obtained without any thermal effects on the seamless steel pipe, and in the case of the conventional water-cooled roller shown in FIG. 9, there was a temperature variation in operation at the target temperature of ± 50 ° C. Target temperature ± 10 ° C
It has been confirmed that it can be reduced. No build-up phenomenon was observed. As a result, compared to the water-cooled roller shown in FIG.
It has been confirmed that there is an energy saving effect of al / hr.
【００１９】[0019]
【発明の効果】この発明の水冷型ローラは、被処理材と
接触する中央部の胴部表面温度が低く、端面平均温度が
高いため、ビルドアップ現象は見られず、また、ウオー
キングビーム上の被処理材の周方向の熱影響は殆ど認め
られず、正確な熱処理温度で被処理材の熱処理を行うこ
とができると共に、従来の水冷型ローラに比較し、省エ
ネルギー効果を有する。The water-cooled roller according to the present invention has a low body surface temperature at the central portion in contact with the material to be treated and a high end surface average temperature, so that no build-up phenomenon is observed, and The thermal effect of the material to be treated in the circumferential direction is hardly recognized, and the material to be treated can be heat-treated at an accurate heat treatment temperature, and has an energy saving effect as compared with a conventional water-cooled roller.
【図１】この発明の水冷型ローラの一例を示す要部断面
図である。FIG. 1 is a sectional view of a main part showing an example of a water-cooled roller of the present invention.
【図２】この発明の水冷型ローラの他の一例を示す要部
断面図である。FIG. 2 is a sectional view of a main part showing another example of the water-cooled roller of the present invention.
【図３】実施例１で用いた各ローラの形状、温度条件、
温度分布解析結果と効果の説明図である。FIG. 3 shows the shape and temperature conditions of each roller used in Example 1.
It is explanatory drawing of a temperature distribution analysis result and an effect.
【図４】実施例２における各ローラ別の冷却水流速とロ
ーラ端面および中央温度との関係を示すグラフである。FIG. 4 is a graph showing a relationship between a cooling water flow rate for each roller and a roller end face and a center temperature in Example 2.
【図５】ウオーキングビーム型鋼管熱処理炉の要部説明
図である。FIG. 5 is an explanatory view of a main part of a walking beam type steel pipe heat treatment furnace.
【図６】抽出ロールのビルドアップ発生箇所の説明図で
ある。FIG. 6 is an explanatory diagram of a build-up location of an extraction roll.
【図７】抽出ロールの端面温度がウオーキングビーム上
の被処理材の周方向に熱影響を及ぼすことの説明図であ
る。FIG. 7 is an explanatory diagram showing that the end face temperature of the extraction roll has a thermal effect on a circumferential direction of a material to be processed on a walking beam.
【図８】従来の軸水冷型ローラの要部断面図である。FIG. 8 is a sectional view of a main part of a conventional shaft water-cooled roller.
【図９】従来の水冷型ローラの要部断面図である。FIG. 9 is a sectional view of a main part of a conventional water-cooled roller.
１、１１、８１、９１ ローラ本体 ２、１２ 中央部 ３、１４、９２ 冷却水通路 ４、１５、８２、９３ 回転軸 ５、１６ 冷却水供給路 ６、１７ 冷却水排出路 ７、１３ 端部 ８ 断熱層 ９、１９、５５、７４ ローラ端面 １８ 間隙 ５１、７３ 被処理材 ５２、７２ ウオーキングビーム ５３ 鋼管熱処理炉 ５４、６１、７１ 抽出ローラ ６２ 鋼管 ６３ 接触点 ６４ ビルドアップ ８３、９４ 冷却水 1, 11, 81, 91 Roller body 2, 12 Central part 3, 14, 92 Cooling water passage 4, 15, 82, 93 Rotating shaft 5, 16 Cooling water supply path 6, 17 Cooling water discharge path 7, 13 End part Reference Signs List 8 Heat insulation layer 9, 19, 55, 74 Roller end face 18 Gap 51, 73 Workpiece 52, 72 Walking beam 53 Steel pipe heat treatment furnace 54, 61, 71 Extraction roller 62 Steel pipe 63 Contact point 64 Build-up 83, 94 Cooling water
Claims (2)
ラにおいて、ローラ本体の鋼管と接触する中央部に冷却
水通路を形成し、前記中央部と端部間に断熱層を設け、
端面を冷却部から遮断することを特徴とする鋼管熱処理
炉用冷却式ローラ。1. A cooling roller for charging and extracting a steel pipe heat treatment furnace, wherein a cooling water passage is formed in a central portion of the roller body that comes into contact with the steel pipe, and a heat insulating layer is provided between the central portion and an end portion.
A cooling roller for a heat treatment furnace for steel pipes, wherein an end face is shielded from a cooling section.
ラにおいて、ローラ本体を鋼管と接触する中央部と端部
とに分割し、前記中央部に冷却水通路を形成すると共
に、中央部と端部間に所定の間隙を設けたことを特徴と
する鋼管熱処理炉用冷却式ローラ。2. A cooling roller for charging and extracting a steel pipe heat treatment furnace, wherein a roller body is divided into a central part and an end part which come into contact with the steel pipe, and a cooling water passage is formed in the central part. A cooling roller for a heat treatment furnace for steel pipes, wherein a predetermined gap is provided between the end portion and the end portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08103796A JP3178650B2 (en) | 1996-03-08 | 1996-03-08 | Cooling roller for steel tube heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08103796A JP3178650B2 (en) | 1996-03-08 | 1996-03-08 | Cooling roller for steel tube heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09241748A JPH09241748A (en) | 1997-09-16 |
| JP3178650B2 true JP3178650B2 (en) | 2001-06-25 |
Family
ID=13735262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08103796A Expired - Lifetime JP3178650B2 (en) | 1996-03-08 | 1996-03-08 | Cooling roller for steel tube heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3178650B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946878A (en) * | 2015-06-18 | 2015-09-30 | 陈唯生 | High-temperature-resisting furnace bottom roller |
-
1996
- 1996-03-08 JP JP08103796A patent/JP3178650B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09241748A (en) | 1997-09-16 |
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