JP5293200B2

JP5293200B2 - Hot-rolled steel pipe transfer equipment

Info

Publication number: JP5293200B2
Application number: JP2009002708A
Authority: JP
Inventors: 紀男塩津
Original assignee: JFE Steel Corp
Current assignee: JFE Steel Corp
Priority date: 2009-01-08
Filing date: 2009-01-08
Publication date: 2013-09-18
Anticipated expiration: 2029-01-08
Also published as: JP2010158701A

Abstract

<P>PROBLEM TO BE SOLVED: To provide equipment for conveying a hot-rolled steel pipe, which prevents the generation of the bend of a pipe caused by uneven cooling. <P>SOLUTION: This equipment for conveying hot-rolled steel pipes is provided with a plurality of rollers 1 which are arranged with a predetermined interval therebetween in the conveyance direction and a plurality of roller driving motors 2 which are connected to each roller 1 and controls the rotation of each roller. Each roller 1 is mounted rotatably on a chain conveyer 3 for conveyance through roller bearings 6a and roller holders 6b and each roller 1 is held freely rotatably so that each roller 1 is not brought into contact with the chain conveyer 3 for conveyance in the state where a cylindrical hot-rolled steel pipe W is placed on adjacent rollers. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、冷却床に設置して好適な熱延鋼管の搬送設備に関する。 The present invention relates to a hot-rolled steel pipe transfer facility suitable for installation on a cooling floor.

電縫鋼管、継目無鋼管などの鋼管は熱間圧延して所定の肉厚、外径とした後、切断して所望の長さとし、冷却床と称す設備に搬送され、冷却される。図２には、縮径圧延設備７と、その下流側の冷却床８の配置を示した。縮径圧延設備７は、誘導加熱装置７ａ、縮径圧延機７ｂ、ホットソー（熱間切断装置）７ｃからなる。ホットソー７ｃで切断された熱延鋼管の搬送方向と、冷却床８における熱延鋼管Ｗの搬送方向とは９０度異なっている。 Steel pipes such as ERW steel pipes and seamless steel pipes are hot-rolled to have a predetermined thickness and outer diameter, then cut to a desired length, conveyed to a facility called a cooling bed, and cooled. FIG. 2 shows the arrangement of the reduced diameter rolling equipment 7 and the cooling bed 8 on the downstream side thereof. The reduced diameter rolling equipment 7 includes an induction heating device 7a, a reduced diameter rolling machine 7b, and a hot saw (hot cutting device) 7c. The conveyance direction of the hot-rolled steel pipe cut by the hot saw 7c is different from the conveyance direction of the hot-rolled steel pipe W in the cooling bed 8 by 90 degrees.

そこで、冷却床８と称す設備には、スクリュー式の熱延鋼管の搬送設備が設置されている（たとえば特許文献１）。
スクリュー式の熱延鋼管の搬送設備は、図３（ａ）、（ｂ）に示すように、複数のスクリューシャフト９、それを回転する駆動用モータ１０を具備し、モータ駆動軸１０ａ、変速機１０ｂを介して各スクリューシャフト９を回転させる構成となっている。このスクリュー式の熱延鋼管の搬送設備によれば、複数のスクリューシャフト９に跨って熱延鋼管Ｗを載せた後、複数のスクリューシャフト９を同一回転速度で回転させ、熱延鋼管Ｗを矢印で示す搬送方向に搬送することができる。 Therefore, a facility called a cooling bed 8 is provided with a screw-type hot-rolled steel pipe transfer facility (for example, Patent Document 1).
As shown in FIGS. 3 (a) and 3 (b), the screw-type hot-rolled steel pipe conveying equipment includes a plurality of screw shafts 9 and a driving motor 10 that rotates the screw shafts 9, and a motor drive shaft 10a and a transmission. Each screw shaft 9 is configured to rotate via 10b. According to this screw-type hot-rolled steel pipe transfer facility, after the hot-rolled steel pipe W is placed across the plurality of screw shafts 9, the plurality of screw shafts 9 are rotated at the same rotational speed, and the hot-rolled steel pipe W is moved to the arrow. It can convey in the conveyance direction shown by.

特開平9-295027号公報Japanese Patent Laid-Open No. 9-295027

しかしながら、スクリュー式の熱延鋼管の搬送設備では、複数のスクリューシャフト９に跨って熱延鋼管Ｗを載せた後、搬送中常に、熱延鋼管Ｗの長さ方向の同じ個所が、回転するスクリューシャフト９と接触するため、熱延鋼管Ｗの長さ方向複数個所に偏冷却部ＷＡが生じる（図３参照）。これによって、図４に示すように、搬送中、熱延鋼管Ｗに管曲りが発生するという問題があった。熱延鋼管Ｗに管曲がりが発生すると搬送トラブル、歩留りの低下をまねく。 However, in the screw-type hot-rolled steel pipe transfer facility, after the hot-rolled steel pipe W is placed across the plurality of screw shafts 9, the same part in the length direction of the hot-rolled steel pipe W is always rotated during the transfer. Since it contacts with the shaft 9, the partial cooling part WA arises in several places of the length direction of the hot-rolled steel pipe W (refer FIG. 3). As a result, as shown in FIG. 4, there is a problem in that the hot-rolled steel pipe W is bent during conveyance. If a pipe bend occurs in the hot-rolled steel pipe W, conveyance troubles and yields are reduced.

本発明は、上記従来技術の問題点を解消し、搬送中、偏冷却による管曲りが発生することを防止できる熱延鋼管の搬送設備を提供することを目的とする。 An object of the present invention is to provide a hot-rolled steel pipe transfer facility that solves the above-described problems of the prior art and prevents pipe bending due to uneven cooling during transfer.

本発明者は、熱延鋼管の搬送設備について鋭意検討した結果、搬送用チェーンコンベア上に複数のローラを回転可能に搭載し、隣接するローラで熱延鋼管を回転させながら搬送すれば、上記課題を解決できることを見出し、この知見に基づいて本発明をなすに至った。
すなわち本発明は、以下のとおりである。
１．搬送用チェーンコンベアを搬送区間にわたり敷設した熱延鋼管の搬送設備であって、所定間隔を隔てて搬送方向に並べ、搬送中常時、前記熱延鋼管と長さ方向全長にわたり線接触する複数のローラと、各ローラに接続され、かつ各ローラの回転を制御することができる複数の駆動用モータとを具備し、前記搬送用チェーンコンベア上に各ローラがローラ保持手段を介して回転可能に搭載されていることを特徴とする熱延鋼管の搬送設備。 As a result of earnestly examining the transfer equipment for hot-rolled steel pipes, the present inventors have mounted a plurality of rollers on a transfer chain conveyor in a rotatable manner, and the hot-rolled steel pipes are conveyed while rotating with adjacent rollers. It was found that the problem can be solved, and the present invention has been made based on this finding.
That is, the present invention is as follows.
1. A hot-rolled steel pipe transfer facility in which a transfer chain conveyor is laid over the transfer section, arranged in the transfer direction at a predetermined interval, and a plurality of rollers that are in line contact with the hot-rolled steel pipe over the entire length in the length direction during transfer. And a plurality of drive motors connected to each roller and capable of controlling the rotation of each roller, and each roller is rotatably mounted on the conveying chain conveyor via a roller holding means. This is a hot-rolled steel pipe transport facility.

本発明によれば、搬送用チェーンコンベア上に複数のローラを回転可能に搭載したから、熱延鋼管を順次隣接するローラ上に載せた後、隣接するローラを駆動用モータで同一方向に回転させることで、熱延鋼管を回転させつつ搬送することができる。その際、搬送中常に、熱延鋼管Ｗ長さ方向全長にわたり、熱延鋼管Ｗが回転するローラと線接触するため、熱延鋼管Ｗが熱延鋼管Ｗの長さ方向全長にわたり均一に冷却される。これによって管曲がりが抑制され、管曲がりによる搬送トラブルを防止でき、生産性の向上、歩留り向上を図ることができる。 According to the present invention, since the plurality of rollers are rotatably mounted on the transport chain conveyor, the hot-rolled steel pipes are sequentially placed on the adjacent rollers, and then the adjacent rollers are rotated in the same direction by the drive motor. Thereby, it can convey, rotating a hot-rolled steel pipe. At that time, since the hot-rolled steel pipe W is in line contact with the rotating roller over the entire length in the length direction of the hot-rolled steel pipe W, the hot-rolled steel pipe W is uniformly cooled over the entire length in the length direction of the hot-rolled steel pipe W. The As a result, the bending of the pipe is suppressed, the conveyance trouble due to the bending of the pipe can be prevented, and the productivity and the yield can be improved.

（ａ）、（ｂ）は本発明にかかる熱延鋼管の搬送設備の構成を示す側面図、同平面図であり、（ｃ）はその作用を説明する側面図である。(A), (b) is the side view which shows the structure of the conveyance equipment of the hot rolled steel pipe concerning this invention, the same top view, (c) is a side view explaining the effect | action. 本発明を適用した鋼管製造ラインの設備構成を示す斜視図である。It is a perspective view which shows the equipment structure of the steel pipe manufacturing line to which this invention is applied. （ａ）は従来の熱延鋼管の搬送設備の構成を示す平面図、（ｂ）はその要部を示す平面図である。(A) is a top view which shows the structure of the conveyance equipment of the conventional hot rolled steel pipe, (b) is a top view which shows the principal part. 従来の熱延鋼管の搬送設備の問題点を説明する平面図である。It is a top view explaining the problem of the conveyance equipment of the conventional hot rolled steel pipe.

以下、本発明にかかる熱延鋼管の搬送設備について詳細に説明する。
図１（ａ）、（ｂ）は本発明にかかる熱延鋼管の搬送設備の構成を示す側面図、同平面図であり、（ｃ）はその作用を説明する側面図である。
図１（ａ）中、３は搬送用チェーンコンベアを示す。搬送用チェーンコンベア３は搬送区間にわたり敷設されており、熱延鋼管Ｗは、搬送方向に搬送用チェーンコンベアで搬送される。この搬送用チェーンコンベア３は、チェーンが噛み合う歯を多数形成されたスプロケットを介し、スプロケット固定用シャフト４と連結され、コンベア駆動用モータ５で駆動される。コンベア駆動用モータ５は搬送区間の両側に設置されている。このようなチェーンコンベア式の搬送設備は公知である。 Hereinafter, the hot-rolled steel pipe transfer equipment according to the present invention will be described in detail.
FIGS. 1A and 1B are a side view and a plan view showing the structure of a hot-rolled steel pipe transfer facility according to the present invention, and FIG.
In Fig.1 (a), 3 shows the chain conveyor for conveyance. The transfer chain conveyor 3 is laid over the transfer section, and the hot-rolled steel pipe W is transferred by the transfer chain conveyor in the transfer direction. The transport chain conveyor 3 is connected to a sprocket fixing shaft 4 via a sprocket having a large number of teeth with which the chain meshes, and is driven by a conveyor driving motor 5. The conveyor driving motors 5 are installed on both sides of the conveyance section. Such a chain conveyor type transport facility is known.

本発明にかかる熱延鋼管の搬送設備は、図１（ａ）、（ｂ）に示したように、所定間隔を隔てて搬送方向に並べた複数のローラ１と、各ローラ１に接続され、かつ各ローラ１の回転を制御することができる複数の駆動用モータ２とを具備し、搬送用チェーンコンベア３上に各ローラ１がローラ保持手段６ａ、６ｂを介して回転可能に搭載されていることを特徴とする。 As shown in FIGS. 1A and 1B, the hot-rolled steel pipe conveying facility according to the present invention is connected to a plurality of rollers 1 arranged in the conveying direction at a predetermined interval, and to each roller 1. And a plurality of drive motors 2 that can control the rotation of each roller 1, and each roller 1 is rotatably mounted on a conveying chain conveyor 3 via roller holding means 6 a and 6 b. It is characterized by that.

ここで、６ａはローラ軸受、６ｂはローラ受けである。ローラ軸受６ａは各ローラ１の長さ方向両端部に配置され、搬送用チェーンコンベア３に連結されている。ローラ受け６ｂは、長さ方向両端部を除く、搬送用チェーンコンベア３上に配置され、対応する搬送用チェーンコンベア３に連結されている。どちらも、隣接するローラ１上に円筒状の熱延鋼管Ｗを載せた状態で、各ローラ１が搬送用チェーンコンベア３と接触しないように各ローラ１を回転自在に保持するローラ保持手段である。また、複数のローラ１は隣接するローラ１上に熱延鋼管Ｗを載せることができるように並べられている。なお、搬送制御装置２０は、搬送用チェーンコンベア３を回転駆動するコンベア駆動用モータ５と電気的に接続されているとともに各ローラ１を回転する駆動用モータ２とも電気的に接続されている。この各ローラ１を回転する駆動用モータ２は、搬送用チェーンコンベア３と同期して移動できるように別に移動架台に搭載されている。 Here, 6a is a roller bearing, and 6b is a roller receiver. The roller bearings 6 a are disposed at both ends in the length direction of the respective rollers 1 and are connected to the conveying chain conveyor 3. The roller receivers 6b are disposed on the transport chain conveyor 3 except for both ends in the length direction, and are connected to the corresponding transport chain conveyor 3. Both are roller holding means for rotatably holding each roller 1 so that each roller 1 does not come into contact with the conveying chain conveyor 3 with a cylindrical hot-rolled steel pipe W placed on the adjacent roller 1. . The plurality of rollers 1 are arranged so that the hot-rolled steel pipe W can be placed on the adjacent rollers 1. The conveyance control device 20 is electrically connected to a conveyor driving motor 5 that rotates the conveyance chain conveyor 3 and is also electrically connected to a driving motor 2 that rotates each roller 1. The driving motor 2 that rotates each roller 1 is mounted on a moving stand so that it can move in synchronization with the conveying chain conveyor 3.

このような構成を有する熱延鋼管の搬送設備によれば、熱延鋼管Ｗを順次隣接するローラ１上に載せた後、隣接するローラ１の上に載せた熱延鋼管Ｗを、駆動用モータ２で同一方向に回転させつつ搬送することができる。その際、熱延鋼管Ｗの長さ方向全長にわたり、熱延鋼管Ｗは回転するローラ１と線接触する。搬送中常時、熱延鋼管Ｗと隣接するローラ１とがＰ、Ｑ点で線接触している状態を図１（ｃ）に示した。 According to the hot-rolled steel pipe conveyance facility having such a configuration, after the hot-rolled steel pipe W is sequentially placed on the adjacent roller 1, the hot-rolled steel pipe W placed on the adjacent roller 1 is replaced with a drive motor. 2 can be conveyed while rotating in the same direction. At that time, the hot-rolled steel pipe W is in line contact with the rotating roller 1 over the entire length in the length direction of the hot-rolled steel pipe W. FIG. 1C shows a state where the hot-rolled steel pipe W and the adjacent roller 1 are in line contact with each other at points P and Q at all times during conveyance.

隣接するローラ１上に載せた熱延鋼管Ｗは、搬送中常時、Ｐ、Ｑ点で線接触しつつ回転されることから、熱延鋼管Ｗは長さ方向全長にわたり均一に冷却される。これによって、管曲がりによる搬送トラブルを防止でき、生産性の向上、歩留り向上を図ることができる。 Since the hot-rolled steel pipe W placed on the adjacent roller 1 is always rotated while being in line contact at points P and Q during conveyance, the hot-rolled steel pipe W is uniformly cooled over the entire length in the length direction. As a result, it is possible to prevent a conveyance trouble due to bending of the tube, and to improve productivity and yield.

図１（ａ）、（ｂ）に示した本発明にかかる熱延鋼管の搬送設備を、縮径圧延設備の下流の冷却床８に適用した（図２参照）。熱延鋼管Ｗを冷却する冷却床８には、エアーを吹き付ける空冷設備や冷却水を噴射する水冷設備が設置されている。本発明にかかる熱延鋼管の搬送設備を冷却床に適用したことにより、エアーを吹き付ける空冷設備や、冷却水を噴射する水冷設備と相俟って、隣接するローラ１上に載せた熱延鋼管Ｗがローラ１と線接触しつつ回転され、長さ方向全長にわたり均一に冷却された。 The hot-rolled steel pipe transfer equipment according to the present invention shown in FIGS. 1A and 1B was applied to the cooling bed 8 downstream of the reduced diameter rolling equipment (see FIG. 2). The cooling floor 8 for cooling the hot-rolled steel pipe W is provided with an air cooling facility for blowing air and a water cooling facility for injecting cooling water. The hot-rolled steel pipe mounted on the adjacent roller 1 in combination with the air-cooling equipment for blowing air and the water-cooling equipment for injecting cooling water by applying the hot-rolled steel pipe transfer equipment according to the present invention to the cooling floor. W was rotated while being in line contact with the roller 1 and cooled uniformly over the entire length.

Ｗ被搬送物（熱延鋼管）
ＷＡ偏冷却部
１ローラ
２駆動用モータ
３搬送用チェーンコンベア
４スプロケット用シャフト
５コンベア駆動用モータ
６ａローラ軸受（ローラ保持手段）
６ｂローラ受け（ローラ保持手段）
７縮径圧延設備
７ａ誘導加熱装置
７ｂ縮径圧延機
７ｃホットソー（熱間切断機）
８冷却床
９スクリューシャフト
１０駆動用モータ
１０ａモータ駆動軸
１０ｂ変速機
２０搬送制御装置 W Conveyed object (hot rolled steel pipe)
WA Unequal cooling section 1 Roller 2 Driving motor 3 Conveying chain conveyor 4 Sprocket shaft 5 Conveyor driving motor 6a Roller bearing (roller holding means)
6b Roller receiver (roller holding means)
7 Reduced diameter rolling equipment 7a Induction heating device 7b Reduced diameter rolling mill 7c Hot saw (hot cutting machine)
8 Cooling bed 9 Screw shaft 10 Drive motor 10a Motor drive shaft 10b Transmission 20 Transport control device

Claims

A hot-rolled steel pipe transfer facility in which a transfer chain conveyor is laid over the transfer section, arranged in the transfer direction at a predetermined interval, and a plurality of rollers that are in line contact with the hot-rolled steel pipe over the entire length in the length direction during transfer. And a plurality of roller driving motors connected to each roller and capable of controlling the rotation of each roller, and each roller is rotatably mounted on a conveying chain conveyor via a roller holding means. This is a hot-rolled steel pipe transport facility.