JPH0838977A - Descaling and lubricant coating device for pipe inside surface of seamless pipe - Google Patents
Descaling and lubricant coating device for pipe inside surface of seamless pipeInfo
- Publication number
- JPH0838977A JPH0838977A JP6193769A JP19376994A JPH0838977A JP H0838977 A JPH0838977 A JP H0838977A JP 6193769 A JP6193769 A JP 6193769A JP 19376994 A JP19376994 A JP 19376994A JP H0838977 A JPH0838977 A JP H0838977A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- lubricant
- descaling
- pressure water
- shield
- 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.)
- Withdrawn
Links
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Nozzles (AREA)
- Spray Control Apparatus (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、継目無鋼管等の継目無
管を圧延ロールとプラグにより熱間圧延するに際し、管
内面をデスケーリングするとともに、このデスケーリン
グの直後に管内面に潤滑剤を塗布する、継目無管の管内
面デスケリーング・潤滑剤塗布装置に関する。BACKGROUND OF THE INVENTION The present invention relates to descaling of a pipe inner surface when hot rolling a seamless pipe such as a seamless steel pipe with a rolling roll and a plug, and immediately after this descaling, a lubricant is applied to the pipe inner surface. The present invention relates to a seamless pipe inner surface descaling / lubricant coating device for coating.
【０００２】[0002]
【従来の技術】マンネスマン・プラグミル方式による継
目無管の製造工程では、ピアサによる穿孔後の中空素管
内面に酸化スケールを生じ、ピアサ以後のエロンゲー
タ、プラグミル、リーラ等で圧延ロールとプラグによる
圧延時に、この酸化スケールがプラグによって管内面に
押し込まれ、あばた疵やピット疵と呼ばれる管内面疵を
生ずる。2. Description of the Related Art In the manufacturing process of a seamless pipe by the Mannesmann plug mill system, oxide scale is generated on the inner surface of the hollow shell after piercing with a piercer, and when rolling with a rolling roll and a plug with an elongator, plug mill, reeler, etc. The oxide scale is pushed into the inner surface of the pipe by the plug, and defects on the inner surface of the pipe which are called pit defects or pit defects are generated.
【０００３】そこで、この管内面疵の発生を防止するた
め、特開昭56-151106 号公報に記載の如く、磨管工程の
直前で、高圧水の噴射によって管内面スケールをデスケ
ーリングし、この高圧水噴射の直後のデスケーリングさ
れた表面に粉状黒鉛等の潤滑剤を噴射して塗布する方法
が提案されている。図６は、このような管内面デスケー
リング・潤滑剤塗布装置を示す模式図であり、１は中空
素管、２は二重管からなるランスであり、ランス２は外
管と内管の間の高圧水通路に連なる高圧水噴射ノズル３
と、内管内の潤滑剤通路に連なる潤滑剤噴射ノズル４と
を有している。Therefore, in order to prevent the occurrence of flaws on the inner surface of the pipe, as described in Japanese Patent Application Laid-Open No. 56-151106, the inner scale of the inner surface of the pipe is descaled by jetting high-pressure water immediately before the polishing process. A method has been proposed in which a lubricant such as powdered graphite is sprayed and applied on the descaled surface immediately after spraying high-pressure water. FIG. 6 is a schematic diagram showing such a pipe inner surface descaling / lubricant coating device, 1 is a hollow shell, 2 is a lance consisting of a double tube, and lance 2 is between an outer tube and an inner tube. High-pressure water injection nozzle 3 connected to the high-pressure water passage
And a lubricant injection nozzle 4 connected to the lubricant passage in the inner pipe.
【０００４】[0004]
【発明が解決しようとする課題】然しながら、従来技術
では、中空素管１内の高圧水噴射ノズル３による高圧水
噴射方向と反対側が負圧になって、いわゆるエジェクタ
効果を生ずる。このエジェクタ効果により、中空素管１
の管端から管内に外部空気が大量に流入し、粉状黒鉛等
の潤滑剤はこの空気流によって管内面に付着することな
くデスケーリング水に巻き込まれて管外に流出してしま
う。これにより、管内面への潤滑剤の塗布効率が低下
し、ひいては圧延効率が低下してしまう。この傾向は、
管内径が大きく、デスケーリング水量の多い大径管にお
いて顕著である。However, in the prior art, a negative pressure is generated on the side opposite to the high-pressure water jetting direction by the high-pressure water jetting nozzle 3 in the hollow shell 1 to produce a so-called ejector effect. Due to this ejector effect, the hollow shell 1
A large amount of external air flows into the pipe from the pipe end, and the lubricant such as powdered graphite is caught in the descaling water without adhering to the inner surface of the pipe and flows out of the pipe. As a result, the coating efficiency of the lubricant on the inner surface of the pipe is reduced, which in turn reduces the rolling efficiency. This trend is
This is remarkable in a large-diameter pipe with a large pipe inner diameter and a large amount of descaling water.
【０００５】本発明は、継目無管の熱間圧延工程におい
て、高圧水噴射によるデスケーリング直後の管内面への
潤滑剤の塗布効率を向上し、管内面疵の発生を防止しな
がら、圧延効率を向上することを目的とする。The present invention improves the coating efficiency of the lubricant on the inner surface of the pipe immediately after descaling by high-pressure water injection in the seamless hot rolling process, and prevents the occurrence of flaws on the inner surface of the pipe while improving the rolling efficiency. The purpose is to improve.
【０００６】[0006]
【課題を解決するための手段】請求項１に記載の本発明
は、圧延ロールとプラグにより中空素管を圧延するに先
立ち、中空素管内に高圧水噴射ノズルと潤滑剤噴射ノズ
ルとを有するランスを挿入し、高圧水噴射ノズルが噴射
する高圧水によって管内面をデスケーリングすると同時
に、潤滑剤噴射ノズルが噴射する潤滑剤を管内面に塗布
する継目無管の管内面デスケーリング・潤滑剤塗布装置
において、前記ランスの高圧水噴射ノズルと潤滑剤噴射
ノズルとの中間部に、管内面に接する耐熱傘状の遮蔽体
を設けてなるようにしたものである。According to the present invention as set forth in claim 1, a lance having a high-pressure water jet nozzle and a lubricant jet nozzle in the hollow shell prior to rolling the hollow shell by a rolling roll and a plug. , And the descaling of the inner surface of the pipe by the high-pressure water sprayed by the high-pressure water spray nozzle, and at the same time, the lubricant sprayed by the lubricant spray nozzle is applied to the inner surface of the pipe. In this case, a heat-resistant umbrella-shaped shield which is in contact with the inner surface of the pipe is provided in the intermediate portion between the high pressure water jet nozzle and the lubricant jet nozzle of the lance.
【０００７】請求項２に記載の本発明は、請求項１に記
載の本発明において更に、前記遮蔽体が、可撓耐熱繊維
からなり、小径管〜大径管のいずれの管内面に接するよ
うに構成されてなるようにしたものである。According to a second aspect of the present invention, in addition to the first aspect of the present invention, the shield is made of a flexible heat resistant fiber and is in contact with any inner surface of the small diameter tube to the large diameter tube. It is configured as follows.
【０００８】[0008]
【作用】請求項１に記載の本発明によれば下記作用が
ある。 中空素管内に挿入されるランスの高圧水噴射ノズルと
潤滑剤噴射ノズルとの中間部に、管内面に接する耐熱傘
状の遮蔽体を設けた。従って、高圧水噴射ノズルによる
高圧水噴射方向と反対側に生ずる負圧に起因するエジェ
クタ効果は、管内径を遮断する遮蔽体によって遮蔽さ
れ、潤滑剤噴射ノズル側に及ぶことがない。従って、潤
滑剤噴射ノズルから噴射された粉状黒鉛等の潤滑剤はデ
スケーリング水に巻き込まれることなく、管内面に確実
に到達、付着する。よって、継目無管の熱間圧延工程に
おいて、高圧水噴射によるデスケーリング直後の管内面
への潤滑剤の塗布効率を向上し、管内面疵の発生を防止
しながら、圧延効率を向上することができる。According to the present invention described in claim 1, the following effects can be obtained. A heat-resistant umbrella-shaped shield, which is in contact with the inner surface of the pipe, is provided in the intermediate portion between the high-pressure water jet nozzle and the lubricant jet nozzle of the lance inserted into the hollow shell. Therefore, the ejector effect caused by the negative pressure generated on the opposite side of the high-pressure water jetting direction by the high-pressure water jetting nozzle is shielded by the shield that blocks the inner diameter of the pipe and does not reach the lubricant jetting nozzle side. Therefore, the lubricant such as powdered graphite injected from the lubricant injection nozzle reliably reaches and adheres to the inner surface of the pipe without being caught in the descaling water. Therefore, in the seamless hot rolling process of the pipe, it is possible to improve the coating efficiency of the lubricant on the inner surface of the pipe immediately after descaling by high-pressure water injection, and to improve the rolling efficiency while preventing the occurrence of inner pipe defects. it can.
【０００９】請求項２に記載の本発明によれば下記の
作用がある。 遮蔽体の外径（遮蔽直径）が固定的である場合には、
(a) 遮蔽体の外径が管内面に接して一定の遮蔽効果を確
保できるようにするため、小径管に対しては小外径の遮
蔽体、大径管に対しては大外径の遮蔽体を用いるよう
に、管サイズの変更に応じて遮蔽体のサイズ替えが必要
となる。また、(b) ランスはそり状のランスサポートに
よって管内面上に支持されるため、ランス軸が管軸と一
致しない場合（偏心）には、ランス軸に同軸配置した遮
蔽体によって管内径部の全域を遮断することに困難があ
る。The present invention according to claim 2 has the following effects. If the outer diameter of the shield (shield diameter) is fixed,
(a) In order that the outer diameter of the shield comes into contact with the inner surface of the pipe to ensure a certain shielding effect, a shield with a small outer diameter is used for small-diameter pipes and a large outer diameter is used for large-diameter pipes. As the size of the tube changes, the size of the shield needs to be changed so that the shield is used. (B) Since the lance is supported on the inner surface of the pipe by the sled-shaped lance support, if the lance axis does not coincide with the tube axis (eccentricity), the shield placed coaxially with the lance axis prevents It is difficult to block the whole area.
【００１０】これに対し、耐熱傘状の遮蔽体を可撓耐熱
繊維にて構成することにより、遮蔽体の外径（遮蔽直
径）を管内径の変動に容易に追従可能とすることができ
る。即ち、(a) 小径管に対しては遮蔽体を大きく撓ませ
て小外径化し、大径管に対しては遮蔽体の撓みを小とし
て大外径化し、管サイズの変更に対しても遮蔽体のサイ
ズ替えを不要とし、遮蔽体によって各種サイズの管内径
を確実に遮断できる。また、(b) ランスをそり状のラン
スサポートによって管内面に支持する場合、ランス軸が
管軸と不一致（偏心）となっても、ランス軸に同軸配置
した遮蔽体の外周各部の拡がり（撓み）をその軸回りで
異ならせ、遮蔽体の外周各部の全てを管内径部に当接さ
せることができ、遮蔽体によって管内径部の全域を確実
に遮断できる。On the other hand, when the heat-resistant umbrella-shaped shield is made of flexible heat-resistant fiber, the outer diameter (shield diameter) of the shield can easily follow the fluctuation of the pipe inner diameter. That is, (a) For a small-diameter pipe, the shield is largely bent to reduce the outer diameter, and for a large-diameter pipe, the deflection of the shield is small to increase the outer diameter. It is not necessary to change the size of the shield, and the shield can reliably block the inner diameter of various sizes of pipe. (B) When the lance is supported on the inner surface of the pipe by a sled lance support, even if the lance shaft does not match the pipe axis (eccentricity), the spread (flexure) ) Around the axis so that all of the outer peripheral portions of the shield can be brought into contact with the inner diameter of the pipe, and the entire inner diameter of the pipe can be reliably blocked by the shield.
【００１１】[0011]
【実施例】図１は管内面デスケーリング・潤滑剤塗布装
置の一例を示す模式図、図２は図１の遮蔽体を示す模式
図、図３は遮蔽体の外径固定例を示す模式図、図４は本
発明装置による効果を示す線図、図５は傾斜圧延機を示
す模式図、図６は従来例を示す模式図である。EXAMPLE FIG. 1 is a schematic diagram showing an example of a pipe inner surface descaling / lubricant application device, FIG. 2 is a schematic diagram showing the shield of FIG. 1, and FIG. 3 is a schematic diagram showing an example of fixing the outer diameter of the shield. 4 is a diagram showing the effect of the device of the present invention, FIG. 5 is a schematic diagram showing an inclined rolling mill, and FIG. 6 is a schematic diagram showing a conventional example.
【００１２】マンネスマン・プラグミル方式による継目
無管の圧延工程では、ピアサ（傾斜圧延機）によって穿
孔された中空素管１を、エロンゲータ、プラグミル、リ
ーラ等の傾斜圧延機１０で圧延する（図５）。この傾斜
圧延機１０は、圧延ロール１１とプラグ１２により中空
素管１を圧延する。[0012] In the rolling process of the seamless pipe by the Mannesmann plug mill system, the hollow shell 1 perforated by a piercer (tilt rolling machine) is rolled by a tilt rolling machine 10 such as an elongator, a plug mill and a reeler (Fig. 5). . The inclined rolling mill 10 rolls the hollow shell 1 with a rolling roll 11 and a plug 12.
【００１３】然るに、本実施例では、傾斜圧延機１０に
よる中空素管１の圧延工程前に、図１に示す如くの管内
面デスケーリング・潤滑剤塗布装置２０を設けている。
この管内面デスケーリング・潤滑剤塗布装置２０は、図
１、図２に示す如く、走行台車２１に支持されるランス
２２を二重管とし、ランス２２の外管２２Ａと内管２２
Ｂの間の高圧水通路に連なる高圧水噴射ノズル２３と、
内管２２Ｂ内の潤滑剤通路に連なる潤滑剤噴射ノズル２
４とを中空素管１内に挿入可能としている。２７はラン
スサポートである。尚、ランス２２の潤滑剤通路には粉
状黒鉛等の潤滑剤供給装置２５が接続されている。However, in this embodiment, the pipe inner surface descaling / lubricant applying device 20 as shown in FIG. 1 is provided before the rolling process of the hollow shell 1 by the inclined rolling mill 10.
In this pipe inner surface descaling / lubricant application device 20, as shown in FIGS. 1 and 2, a lance 22 supported by a traveling carriage 21 is a double pipe, and an outer pipe 22A and an inner pipe 22 of the lance 22 are provided.
A high-pressure water jet nozzle 23 connected to the high-pressure water passage between B,
Lubricant injection nozzle 2 connected to the lubricant passage in the inner pipe 22B
4 and 4 can be inserted into the hollow shell 1. 27 is a lance support. A lubricant supply device 25 such as powdered graphite is connected to the lubricant passage of the lance 22.
【００１４】これにより、管内面デスケーリング・潤滑
剤塗布装置２０は、高圧水噴射ノズル２３が噴射する高
圧水によって管内面をデスケーリングすると同時に、潤
滑剤噴射ノズル２４が噴射する潤滑剤を管内面に塗布
し、ピアサによる穿孔後の管内面に生ずる酸化スケール
起因の管内面疵の発生を防止するようにしている。As a result, the pipe inner surface descaling / lubricant applying device 20 descales the pipe inner surface by the high pressure water jetted by the high pressure water jet nozzle 23, and at the same time, the lubricant jetted by the lubricant jet nozzle 24 is sprayed on the pipe inner surface. Is applied to the inner surface of the pipe after the piercing to prevent the formation of flaws on the inner surface of the pipe due to oxide scale.
【００１５】然るに、管内面デスケーリング・潤滑剤塗
布装置にあっては、ランス２２の高圧水噴射ノズル２３
と潤滑剤噴射ノズル２４との中間部に、管内面に接する
耐熱傘状の遮蔽体２６を設けている（図２（Ａ））。遮
蔽体２６は、可撓耐熱繊維からなるブラシ状であり、図
２（Ｂ）に示す如くの小径管〜図２（Ｃ）に示す如くの
大径管のいずれの管内面にも接するように構成されてい
る。However, in the pipe inner surface descaling / lubricant applying device, the high pressure water jet nozzle 23 of the lance 22 is used.
A heat-resistant umbrella-shaped shield 26 that is in contact with the inner surface of the pipe is provided at an intermediate portion between the lubricant injection nozzle 24 and the lubricant injection nozzle 24 (FIG. 2A). The shield 26 is in the shape of a brush made of a flexible heat resistant fiber, and contacts the inner surface of any of the small diameter pipe as shown in FIG. 2B to the large diameter pipe as shown in FIG. 2C. It is configured.
【００１６】以下、本実施例の作用について説明する。 中空素管１内に挿入されるランス２２の高圧水噴射ノ
ズル２３と潤滑剤噴射ノズル２４との中間部に、管内面
に接する耐熱傘状の遮蔽体２６を設けた。従って、高圧
水噴射ノズル２３による高圧水噴射方向と反対側に生ず
る負圧に起因するエジェクタ効果は、管内径を遮断する
遮蔽体２６によって遮蔽され、潤滑剤噴射ノズル２４側
に及ぶことがない。従って、潤滑剤噴射ノズル２４から
噴射された粉状黒鉛等の潤滑剤はデスケーリング水に巻
き込まれることなく、管内面に確実に到達、付着する。
よって、継目無管の熱間圧延工程において、高圧水噴射
によるデスケーリング直後の管内面への潤滑剤の塗布効
率を向上し、管内面疵の発生を防止しながら、圧延効率
を向上することができる。The operation of this embodiment will be described below. A heat-resistant umbrella-shaped shield 26, which is in contact with the inner surface of the pipe, is provided at an intermediate portion of the lance 22 inserted into the hollow shell 1 between the high-pressure water jet nozzle 23 and the lubricant jet nozzle 24. Therefore, the ejector effect caused by the negative pressure generated on the side opposite to the high-pressure water jetting direction by the high-pressure water jetting nozzle 23 is shielded by the shield 26 that blocks the inner diameter of the pipe, and does not reach the lubricant jetting nozzle 24 side. Therefore, the lubricant such as powdered graphite injected from the lubricant injection nozzle 24 reliably reaches and adheres to the inner surface of the pipe without being caught in the descaling water.
Therefore, in the seamless hot rolling process of the pipe, it is possible to improve the coating efficiency of the lubricant on the inner surface of the pipe immediately after descaling by high-pressure water injection, and to improve the rolling efficiency while preventing the occurrence of inner pipe defects. it can.
【００１７】遮蔽体２６の外径（遮蔽直径）が固定的
である場合には、(a) 遮蔽体２６の外径が管内面に接し
て一定の遮蔽効果を確保できるようにするため、小径管
に対しては小外径の遮蔽体２６、大径管に対しては大外
径の遮蔽体２６を用いるように、管サイズの変更に応じ
て遮蔽体２６のサイズ替えが必要となる（図３（Ａ）、
（Ｂ））。また、(b) ランス２２はそり状のランスサポ
ートによって管内面上に支持されるため、ランス軸が管
軸と一致しない場合（偏心）には、ランス軸に同軸配置
した遮蔽体２６によって管内径部の全域を遮断すること
に困難がある（図３（Ｂ））。When the outer diameter (shield diameter) of the shield 26 is fixed, (a) the outer diameter of the shield 26 contacts the inner surface of the pipe so that a certain shielding effect can be ensured. It is necessary to change the size of the shield 26 according to the change of the pipe size, such that the shield 26 having the small outer diameter is used for the pipe and the shield 26 having the large outer diameter is used for the large pipe. FIG. 3 (A),
(B)). (B) Since the lance 22 is supported on the inner surface of the pipe by the sled-shaped lance support, when the lance axis does not coincide with the pipe axis (eccentricity), the shield 26 arranged coaxially with the lance axis allows the inner diameter of the pipe to be increased. It is difficult to block the entire area of the part (FIG. 3 (B)).
【００１８】これに対し、耐熱傘状の遮蔽体２６を可撓
耐熱繊維にて構成することにより、遮蔽体２６の外径
（遮蔽直径）を管内径の変動に容易に追従可能とするこ
とができる。即ち、(a) 小径管に対しては遮蔽体２６を
大きく撓ませて小外径化し、大径管に対しては遮蔽体２
６の撓みを小として大外径化し、管サイズの変更に対し
ても遮蔽体２６のサイズ替えを不要とし、遮蔽体２６に
よって各種サイズの管内径を確実に遮断できる（図２
（Ｂ）、（Ｃ））。また、(b) ランス２２をそり状のラ
ンスサポートによって管内面に支持する場合、ランス軸
が管軸と不一致（偏心）となっても、ランス軸に同軸配
置した遮蔽体２６の外周各部の拡がり（撓み）をその軸
回りで異ならせ、遮蔽体２６の外周各部の全てを管内径
部に当接させることができ、遮蔽体２６によって管内径
部の全域を確実に遮断できる（図２（Ｃ））。On the other hand, when the heat-shielding umbrella-shaped shield 26 is made of flexible heat-resistant fiber, the outer diameter (shield diameter) of the shield 26 can easily follow changes in the pipe inner diameter. it can. That is, (a) the shield 26 is largely bent for a small-diameter pipe to have a small outer diameter, and the shield 2 is used for a large-diameter pipe.
The deflection of 6 is made small to increase the outer diameter, and it is not necessary to change the size of the shield 26 even when the pipe size is changed, and the inner diameter of various sizes can be reliably blocked by the shield 26 (FIG. 2).
(B), (C)). (B) When the lance 22 is supported on the inner surface of the pipe by a sled-shaped lance support, even if the lance shaft does not coincide with the pipe axis (eccentricity), the spread of each outer peripheral portion of the shield 26 coaxially arranged on the lance shaft is widened. (Bending) can be made different around its axis, and all the outer peripheral portions of the shield 26 can be brought into contact with the inner diameter portion of the pipe, and the entire inner diameter portion of the pipe can be reliably blocked by the shield 26 (FIG. )).
【００１９】以下、本発明の具体的実施結果について説
明する。継目無鋼管の製品サイズが外径：406.4mm 、肉
厚：12.0mm、長さ：11520mm で、その組成が、Ｃ：0.13
〜0.17wt％、Ｓi ：0.15〜0.25wt％、Ｍｎ：0.40〜0.60
wt％、Ｐ：≦0.025 wt％、Ｓ：≦0.015wt ％を含むもの
を約700 〜900 ℃でリーラで圧延する際に、リーラの前
に本発明の管内面デスケーリング及び潤滑剤塗布装置を
設置して、管内のデスケーリング及び潤滑剤の塗布を行
なった。高圧水噴射圧力は150kgf/cm2、高圧水流量は60
0l/min、黒鉛粉末の潤滑剤を20g/min 、搬送ガスとして
除湿空気を1000l/min を用いて塗布した。ランスの引き
抜き速度を0.5m/sとした。尚、高圧水の噴射角度は管軸
に対して120 °とした。そして、図４に、種々の外径に
リーラで圧延したときの評価を示す。The specific results of carrying out the present invention will be described below. The product size of seamless steel pipe is outer diameter: 406.4mm, wall thickness: 12.0mm, length: 11520mm, and its composition is C: 0.13
~ 0.17wt%, Si: 0.15-0.25wt%, Mn: 0.40-0.60
When rolling a steel containing wt%, P: ≤ 0.025 wt% and S: ≤ 0.015 wt% by a reeler at about 700 to 900 ° C, the pipe inner surface descaling and lubricant coating device of the present invention is used before the reeler. It was installed, and the inside of the tube was descaled and the lubricant was applied. High-pressure water injection pressure is 150 kgf / cm 2 , high-pressure water flow rate is 60
0 l / min, a lubricant of graphite powder was applied at 20 g / min, and dehumidified air was used as a carrier gas at 1000 l / min. The drawing speed of the lance was 0.5 m / s. The injection angle of the high-pressure water was 120 ° with respect to the tube axis. And FIG. 4 shows the evaluation when rolled by various reelers with a reeler.
【００２０】また、従来例として、高圧水の噴射と潤滑
剤の噴射を行なうものの、本発明の遮蔽体を設けないも
のについて、上記実施例と同一条件で処理し、その評価
を図４に併せて示した。Further, as a conventional example, a high-pressure water jet and a lubricant jet, but without the shield of the present invention, were processed under the same conditions as in the above-mentioned embodiment, and the evaluation is shown in FIG. Showed.
【００２１】但し、リーラの圧延効率の定義を以下のよ
うにした。 リーラの圧延効率＝（ロール回転数より計算される圧延
時間＊）／（実圧延時間） 但し、＊：ロールと被圧延材の間にすべりはないとす
る。ここで、潤滑剤のみ供給し、高圧水によるデスケー
リングを行なわない場合のリーラ圧延効率は管外径に関
係なく80％であった（図４の破線）。However, the rolling efficiency of the reeler is defined as follows. Roller rolling efficiency = (rolling time calculated from roll speed *) / (actual rolling time) where *: no slip between the roll and the material to be rolled. Here, the reeler rolling efficiency when only the lubricant was supplied and descaling by high-pressure water was not performed was 80% regardless of the pipe outer diameter (broken line in FIG. 4).
【００２２】従来例にあっては、小径管では潤滑剤粒子
が管内面に到達付着し易くリーラ圧延効率が良いもの
の、大径管ではデスケーリング水のエジェクタ効果で潤
滑剤粒子の管外放出が多くなってリーラ圧延効率が悪く
なる。これに対し、本発明実施例では、小径管〜大径管
の広い範囲で、リーラ圧延効率は良く、安定した潤滑剤
の塗布効率が得られることが認められる。In the conventional example, in the small diameter pipe, the lubricant particles easily reach and adhere to the inner surface of the pipe, and the reeler rolling efficiency is good, but in the large diameter pipe, the lubricant particles are released from the pipe due to the ejector effect of the descaling water. The number of reelers increases and the efficiency of reeler rolling deteriorates. On the other hand, in the examples of the present invention, it is recognized that the reeler rolling efficiency is good and stable lubricant coating efficiency can be obtained in a wide range from the small diameter pipe to the large diameter pipe.
【００２３】以上、本発明の実施例を図面により詳述し
たが、本発明の具体的な構成はこの実施例に限られるも
のではなく、本発明の要旨を逸脱しない範囲の設計の変
更等があっても本発明に含まれる。例えば、本発明の管
内面デスケーリング・潤滑剤塗布装置は、傾斜圧延機内
に設置され、傾斜圧延機によって圧延中の管内面にラン
スを挿入し高圧水の噴射と潤滑剤の噴射を行なうもので
あっても良い。The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, the pipe inner surface descaling / lubricant applying device of the present invention is installed in an inclined rolling mill and inserts a lance into the inner surface of the pipe being rolled by the inclined rolling mill to inject high-pressure water and inject a lubricant. It may be.
【００２４】[0024]
【発明の効果】以上のように本発明によれば、継目無管
の熱間圧延工程において、高圧水噴射によるデスケーリ
ング直後の管内面への潤滑剤の塗布効率を向上し、管内
面疵の発生を防止しながら、圧延効率を向上することが
できる。As described above, according to the present invention, in the hot rolling process of a seamless pipe, the efficiency of applying the lubricant to the inner surface of the pipe immediately after descaling by high-pressure water injection is improved, and the inner surface of the pipe is free from defects. The rolling efficiency can be improved while preventing the occurrence.
【図１】図１は管内面デスケーリング・潤滑剤塗布装置
の一例を示す模式図である。FIG. 1 is a schematic view showing an example of a pipe inner surface descaling / lubricant coating device.
【図２】図２は図１の遮蔽体を示す模式図である。FIG. 2 is a schematic diagram showing the shield of FIG.
【図３】図３は遮蔽体の外径固定例を示す模式図であ
る。FIG. 3 is a schematic view showing an example of fixing the outer diameter of the shield.
【図４】図４は本発明装置による効果を示す線図であ
る。FIG. 4 is a diagram showing an effect of the device of the present invention.
【図５】図５は傾斜圧延機を示す模式図である。FIG. 5 is a schematic view showing an inclined rolling mill.
【図６】図６は従来例を示す模式図である。FIG. 6 is a schematic view showing a conventional example.
１ 中空素管 １１ 圧延ロール １２ プラグ ２０ 管内面デスケーリング・潤滑剤塗布装置 ２２ ランス ２３ 高圧水噴射ノズル ２４ 潤滑剤噴射ノズル ２６ 遮蔽体 1 Hollow Element Pipe 11 Rolling Roll 12 Plug 20 Pipe Inner Surface Descaling / Lubricant Applying Device 22 Lance 23 High Pressure Water Injection Nozzle 24 Lubricant Injection Nozzle 26 Shield
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２１Ｂ 45/08 Ｃ 7726−4Ｅ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B21B 45/08 C 7726-4E
Claims (2)
延するに先立ち、中空素管内に高圧水噴射ノズルと潤滑
剤噴射ノズルとを有するランスを挿入し、高圧水噴射ノ
ズルが噴射する高圧水によって管内面をデスケーリング
すると同時に、潤滑剤噴射ノズルが噴射する潤滑剤を管
内面に塗布する継目無管の管内面デスケーリング・潤滑
剤塗布装置において、 前記ランスの高圧水噴射ノズルと潤滑剤噴射ノズルとの
中間部に、管内面に接する耐熱傘状の遮蔽体を設けてな
ることを特徴とする継目無管の管内面デスケーリング・
潤滑剤塗布装置1. Before rolling a hollow shell by a rolling roll and a plug, a lance having a high-pressure water jet nozzle and a lubricant jet nozzle is inserted into the hollow shell, and high-pressure water jetted by the high-pressure water jet nozzle is used. In a seamless pipe inner surface descaling / lubricant application device for descaling the inner surface of a pipe and at the same time applying a lubricant injected by a lubricant injection nozzle to the inner surface of the pipe, the high pressure water injection nozzle and the lubricant injection nozzle of the lance A seamless pipe inner surface descaling characterized by a heat-resistant umbrella-shaped shield provided in contact with the inner surface of the pipe.
Lubricant application device
小径管〜大径管のいずれの管内面に接するように構成さ
れてなる請求項１記載の継目無管の管内面デスケーリン
グ・潤滑剤塗布装置2. The shield is made of flexible heat resistant fiber,
The seamless pipe inner surface descaling / lubricant application device according to claim 1, wherein the pipe inner surface is in contact with any of the small diameter pipe to the large diameter pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6193769A JPH0838977A (en) | 1994-07-27 | 1994-07-27 | Descaling and lubricant coating device for pipe inside surface of seamless pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6193769A JPH0838977A (en) | 1994-07-27 | 1994-07-27 | Descaling and lubricant coating device for pipe inside surface of seamless pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0838977A true JPH0838977A (en) | 1996-02-13 |
Family
ID=16313507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6193769A Withdrawn JPH0838977A (en) | 1994-07-27 | 1994-07-27 | Descaling and lubricant coating device for pipe inside surface of seamless pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0838977A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101004967B1 (en) * | 2010-04-16 | 2011-01-04 | 듀라케미 (주) | A device for the preheating of painting surface and removing of paint film |
| CN103909105A (en) * | 2014-03-28 | 2014-07-09 | 宝山钢铁股份有限公司 | Mixed jet flow descaling device axially and eccentrically arranged on inner wall of metal pipe |
| CN108201983A (en) * | 2018-03-14 | 2018-06-26 | 无锡职业技术学院 | Inner wall of the pipe floating raft type air cushion electrostatic spraying nozzle |
| CN112007792A (en) * | 2020-08-25 | 2020-12-01 | 卢新亮 | Automatic adjustment shower nozzle based on transmission principle |
-
1994
- 1994-07-27 JP JP6193769A patent/JPH0838977A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101004967B1 (en) * | 2010-04-16 | 2011-01-04 | 듀라케미 (주) | A device for the preheating of painting surface and removing of paint film |
| CN103909105A (en) * | 2014-03-28 | 2014-07-09 | 宝山钢铁股份有限公司 | Mixed jet flow descaling device axially and eccentrically arranged on inner wall of metal pipe |
| WO2015143947A1 (en) * | 2014-03-28 | 2015-10-01 | 宝山钢铁股份有限公司 | Mixed jet descaling device axially and eccentrically arranged for inner wall of pipe |
| JP2017509492A (en) * | 2014-03-28 | 2017-04-06 | 宝山鋼鉄股▲分▼有限公司 | Scale removal device by mixed jet on the inner wall of pipe with axially arranged eccentricity |
| US10888907B2 (en) | 2014-03-28 | 2021-01-12 | Baoshan Iron & Steel Co., Ltd. | Mixed jet descaling device axially and eccentrically arranged for inner wall of pipe |
| CN108201983A (en) * | 2018-03-14 | 2018-06-26 | 无锡职业技术学院 | Inner wall of the pipe floating raft type air cushion electrostatic spraying nozzle |
| CN112007792A (en) * | 2020-08-25 | 2020-12-01 | 卢新亮 | Automatic adjustment shower nozzle based on transmission principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011002 |