JPH0712468U - Pre-pickling equipment for heat-treated steel pipes - Google Patents
Pre-pickling equipment for heat-treated steel pipesInfo
- Publication number
- JPH0712468U JPH0712468U JP4276493U JP4276493U JPH0712468U JP H0712468 U JPH0712468 U JP H0712468U JP 4276493 U JP4276493 U JP 4276493U JP 4276493 U JP4276493 U JP 4276493U JP H0712468 U JPH0712468 U JP H0712468U
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- cooling water
- heat
- cooling
- pickling
- 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.)
- Pending
Links
Abstract
(57)【要約】
【目的】 酸洗時間を短縮するために熱処理した鋼管に
前処理を行う装置を提供する。
【構成】 熱処理した鋼管の内外面に生じたスケールを
除去する酸洗の前処理を行う装置であって、配管２を介
して供給される冷却水を鋼管１内面に噴射する周方向に
複数の冷却水噴射口３ａを形成した内面冷却ノズル３
と、同じく配管４を介して供給される冷却水を鋼管１外
面に噴射する周方向に複数の冷却水噴射口５ａを形成し
た外面冷却ノズル５と、鋼管１を鋼管１軸方向に駆動す
る駆動機構を設ける。
(57) [Abstract] [Purpose] To provide a device for pre-treating a steel pipe heat-treated in order to shorten the pickling time. A device for performing a pretreatment of pickling for removing scales generated on the inner and outer surfaces of a heat-treated steel pipe, wherein a plurality of cooling water supplied through a pipe 2 is jetted to the inner surface of the steel pipe 1 in the circumferential direction. Inner cooling nozzle 3 having a cooling water injection port 3a
And an outer surface cooling nozzle 5 in which a plurality of cooling water injection ports 5a are formed in the circumferential direction for injecting the cooling water supplied through the pipe 4 to the outer surface of the steel pipe 1, and a drive for driving the steel pipe 1 in the axial direction of the steel pipe 1. Provide a mechanism.
Description
【０００１】[0001]
本考案は、熱処理鋼管の酸洗時間を短縮するために前処理を行う装置に関する 。 The present invention relates to a device for performing pretreatment for shortening the pickling time of heat-treated steel pipe.
【０００２】[0002]
従来、熱処理した鋼管の内外面に生じたスケールを除去する目的で、流動酸洗 、揺動酸洗、超音波酸洗等の酸洗処理が一般的に行われている。 また、特開昭５５−１１２１０８号公報、特開昭５６−１５１１０６号公報、 特開平１−１８６２１３号公報、特開平１−２４１３０４号公報等で、鋼管製造 時にその内面又は外面に高圧の空気・水等を噴射してスケールを除去する方法が 提案されている。 Conventionally, pickling treatments such as fluid pickling, rocking pickling, and ultrasonic pickling are generally performed for the purpose of removing scales generated on the inner and outer surfaces of heat-treated steel pipes. Further, in Japanese Patent Laid-Open No. 55-112108, Japanese Patent Laid-Open No. 56-151106, Japanese Patent Laid-Open No. 1-186213, Japanese Patent Laid-Open No. 1-241304, etc., a high pressure air A method of spraying water or the like to remove the scale has been proposed.
【０００３】[0003]
ところが、これらの公報で提案されている鋼管製造時にその内面又は外面に高 圧の空気・水等を噴射してスケールを除去する方法では、高Ｃｒ鋼等に生じた強 固なスケールの除去は困難である。 それに対して、酸洗は高Ｃｒ鋼等に生じた強固なスケールも除去できるという 利点を有しているが、処理時間が長いという問題点をも有している。 However, in the methods proposed in these publications for removing scale by injecting high-pressure air, water, etc. onto the inner surface or outer surface of the steel pipe during manufacturing, it is possible to remove the strong scale generated in high Cr steel, etc. Have difficulty. On the other hand, pickling has the advantage of being able to remove the strong scale produced in high Cr steel and the like, but also has the problem of long processing time.
【０００４】 そこで、本考案の目的は、酸洗時間を短縮するために熱処理した鋼管に前処理 を行う装置を提供することである。Therefore, an object of the present invention is to provide an apparatus for pre-treating a steel pipe heat-treated in order to shorten the pickling time.
【０００５】[0005]
上記した目的を達成するために、本考案は、熱処理した鋼管の内外面に生じた スケールを除去する酸洗の前処理を行う装置であって、配管を介して供給される 冷却水を鋼管内面に噴射する周方向に複数の冷却水噴射口を形成した内面冷却ノ ズルと、同じく配管を介して供給される冷却水を鋼管外面に噴射する周方向に複 数の冷却水噴射口を形成した外面冷却ノズルと、これらの内面及び外面冷却ノズ ル、又は鋼管を鋼管軸方向に駆動する駆動機構を設けたのである。 In order to achieve the above-mentioned object, the present invention is an apparatus for performing pretreatment of pickling that removes scale generated on the inner and outer surfaces of a heat-treated steel pipe, in which cooling water supplied through the pipe is supplied to the inner surface of the steel pipe. Inner cooling nozzle that forms a plurality of cooling water injection holes in the circumferential direction, and a plurality of cooling water injection holes that also injects the cooling water supplied through the pipe to the outer surface of the steel pipe in the circumferential direction. The outer surface cooling nozzle, the inner surface and outer surface cooling nozzles, or the drive mechanism for driving the steel pipe in the axial direction of the steel pipe is provided.
【０００６】[0006]
本考案の熱処理鋼管の酸洗前処理装置は、配管を介して供給される冷却水を鋼 管内面に噴射する周方向に複数の冷却水噴射口を形成した内面冷却ノズルと、同 じく配管を介して供給される冷却水を鋼管外面に噴射する周方向に複数の冷却水 噴射口を形成した外面冷却ノズルと、これらの内面及び外面冷却ノズル、又は鋼 管を鋼管軸方向に駆動する駆動機構を設けたので、熱処理した鋼管の内外面に対 して均一に冷却水を噴射して急冷却でき、鋼管表面に生じたスケールに均一なク ラックが発生する。 そして、かかる鋼管を酸洗処理すると、鋼管表面に生じたスケールに均一に発 生したクラックから塩酸等の酸洗液が浸透してスケールの溶解が促進する。 The pickling pretreatment device for heat-treated steel pipes according to the present invention includes an inner surface cooling nozzle that forms a plurality of cooling water injection holes in the circumferential direction for injecting the cooling water supplied through the pipes to the inner surface of the steel pipe, and the same piping. The outer surface cooling nozzles that form a plurality of cooling water injection holes in the circumferential direction to inject the cooling water supplied through the outer surface of the steel pipe, and the inner surface and outer surface cooling nozzles, or the drive that drives the steel tube in the axial direction of the steel tube. Since the mechanism is provided, the cooling water can be uniformly sprayed to the inner and outer surfaces of the heat-treated steel pipe to rapidly cool it, and uniform cracks are generated on the scale generated on the surface of the steel pipe. Then, when such a steel pipe is pickled, a pickling solution such as hydrochloric acid permeates through the cracks uniformly generated on the scale formed on the surface of the steel pipe to promote dissolution of the scale.
【０００７】[0007]
以下、本考案の一実施例を添付した図面に基づいて説明する。 図１は本考案の装置の構成を示す図、図２は内面冷却ノズル及び外面冷却ノズ ルの断面図である。 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a view showing the constitution of the device of the present invention, and FIG. 2 is a sectional view of an inner surface cooling nozzle and an outer surface cooling nozzle.
【０００８】 図面において、熱処理直後の鋼管１内面に冷却水を噴射する冷却水噴射口３ａ を周方向に例えば８個形成した内面冷却ノズル３を先端に設けた配管２と、鋼管 １外面に冷却水を噴射する冷却水噴射口５ａを周方向に例えば１６個形成した外 面冷却ノズル５を先端に設けた配管４は、ポンプ６に接続されており、このポン プ６の作動によって、冷却水タンク７に貯えられた水が配管２・４を介して内面 冷却ノズル３と外面冷却ノズル５から鋼管１内面及び外面に噴射される。 また、熱処理した鋼管１は図示しない駆動機構によって軸方向に移動する。In the drawing, a pipe 2 provided with an inner surface cooling nozzle 3 having, for example, eight cooling water injection ports 3 a for injecting cooling water in the circumferential direction immediately after heat treatment in the circumferential direction, and a pipe 2 provided on the outer surface of the steel pipe 1 are cooled. A pipe 4 provided with an outer surface cooling nozzle 5 having, for example, 16 cooling water injection ports 5a for injecting water in the circumferential direction at the tip thereof is connected to a pump 6, and the operation of the pump 6 causes the cooling water to flow. Water stored in the tank 7 is sprayed from the inner cooling nozzle 3 and the outer cooling nozzle 5 to the inner and outer surfaces of the steel pipe 1 through the pipes 2 and 4. Further, the heat-treated steel pipe 1 is moved in the axial direction by a drive mechanism (not shown).
【０００９】 本考案の熱処理鋼管の酸洗前処理装置は、以上説明したような構成であり、熱 処理直後の鋼管１は図示しない駆動機構に駆動され、内面冷却ノズル３と外面冷 却ノズル５から冷却水を噴射している中を軸方向に例えば１往復移動し、鋼管１ は機械強度の安定した温度から例えば２００ OＣまで急冷却される。The pickling pretreatment apparatus for heat-treated steel pipes of the present invention is configured as described above, and the steel pipe 1 immediately after the heat treatment is driven by a drive mechanism (not shown) to cool the inner surface cooling nozzle 3 and the outer surface cooling nozzle 5. For example, the steel pipe 1 is reciprocally moved in the axial direction in which the cooling water is being sprayed, and the steel pipe 1 is rapidly cooled from a stable temperature of mechanical strength to, for example, 200 OC .
【００１０】 この時、内面冷却ノズル３と外面冷却ノズル５から噴射した冷却水によって鋼 管１の全長に至って内面及び外面が急冷却されて、鋼管１の内面及び外面に生じ たスケールに均一なクラックが生じる。 このスケールにクラックが生じた鋼管１の酸洗を行うと、短時間でスケールを 除去できる。At this time, the cooling water sprayed from the inner surface cooling nozzle 3 and the outer surface cooling nozzle 5 reaches the entire length of the steel pipe 1 to rapidly cool the inner surface and the outer surface, so that the scale generated on the inner surface and the outer surface of the steel pipe 1 is evenly distributed. Cracks occur. If the steel pipe 1 having cracks in this scale is pickled, the scale can be removed in a short time.
【００１１】 φ５ｍｍの冷却水噴射口を周方向に２４個形成した内面冷却ノズルと、φ１２ ｍｍの冷却水噴射口を周方向に４０個形成した外面冷却ノズルから、１６００リ ットル／ｍｉｎの常温冷却水を長さ６０００ｍｍの熱処理した鋼管に噴射して、 約４００ OＣから約２００ OＣに急冷却した前処理を行った場合の酸洗時間と従 来方法の酸洗時間との比較を次の表１に示す。From an inner surface cooling nozzle formed with 24 φ5 mm cooling water injection holes in the circumferential direction and an outer surface cooling nozzle formed with 40 φ12 mm cooling water injection holes in the circumferential direction, room temperature cooling of 1600 liters / min was performed. water is injected into the heat-treated steel pipe length 6000 mm, compared with the approximately 400 O C from pickling time when the rapid cooled pretreated went to about 200 O C and pickling time of the slave come ways: Is shown in Table 1.
【００１２】[0012]
【表１】 [Table 1]
【００１３】 上記の表１より、本考案の装置を使用して前処理を行うと、従来と比較して酸 洗時間が約１／２になっていることは明らかである。From Table 1 above, it is clear that when the pretreatment is performed using the apparatus of the present invention, the pickling time is about half that of the conventional case.
【００１４】 内面冷却ノズル及び外面冷却ノズルに形成する冷却水噴射口の数・径と鋼管の 移動速度・往復動の回数は、冷却能力によって決定するとよい。 また、内面冷却ノズル及び外面冷却ノズルに形成する冷却水噴射口の数が多く なるにつれて、鋼管をより均一に冷却することができ、スケールにより均一なク ラックが生じる。The number and diameter of cooling water injection ports formed in the inner surface cooling nozzle and the outer surface cooling nozzle, the moving speed of the steel pipe, and the number of reciprocating motions may be determined by the cooling capacity. Further, as the number of cooling water injection ports formed in the inner surface cooling nozzles and the outer surface cooling nozzles increases, the steel pipe can be cooled more uniformly, and uniform scale is generated due to the scale.
【００１５】 なお、本実施例では、鋼管を移動させながら鋼管内外面に冷却水を噴射したが 、駆動機構によって鋼管内外面に冷却水を噴射する内面冷却ノズル及び外面冷却 ノズルを先端に設けた配管を移動させてもよい。 また、本実施例では、鋼管を往復動させて鋼管内外面に生じたスケールにクラ ックを発生させるために、内外面冷却ノズルを鋼管の内外面に対して直角に配置 しているが、鋼管を一方向にのみ移動させてクラックを発生させる場合には、ノ ズルは鋼管の移動方向に所要角度をもって対向させた方がより効果的である。In this embodiment, the cooling water is sprayed on the inner and outer surfaces of the steel pipe while moving the steel pipe. However, the inner surface cooling nozzle and the outer surface cooling nozzle for spraying the cooling water on the inner and outer surfaces of the steel pipe by the drive mechanism are provided at the tip. The piping may be moved. Further, in this embodiment, the inner and outer surface cooling nozzles are arranged at right angles to the inner and outer surfaces of the steel pipe in order to reciprocate the steel pipe and generate cracks in the scale generated on the inner and outer surfaces of the steel pipe. When the steel pipe is moved in only one direction to generate cracks, it is more effective to make the nozzles face each other in the moving direction of the steel pipe at a required angle.
【００１６】[0016]
以上説明したように、本考案の装置を使用すると、機械強度を保った状態で、 高Ｃｒ鋼等の鋼管に生じた除去し難いスケールにも均一にクラックが発生するの で、酸洗時間を短縮できる。 As explained above, when the device of the present invention is used, cracks are uniformly generated even on scales that are difficult to remove that have occurred in steel pipes such as high Cr steel while maintaining mechanical strength. Can be shortened.
【図１】本考案の装置の構成を示す図である。FIG. 1 is a diagram showing a configuration of an apparatus of the present invention.
【図２】本考案の装置の内面冷却ノズル及び外面冷却ノ
ズルの断面図である。FIG. 2 is a sectional view of an inner cooling nozzle and an outer cooling nozzle of the device of the present invention.
１ 鋼管 ２ 配管 ３ 内面冷却ノズル ４ 配管 ５ 外面冷却ノズル 1 Steel pipe 2 Piping 3 Inner cooling nozzle 4 Piping 5 Outer cooling nozzle
Claims (1)
ルを除去する酸洗の前処理を行う装置であって、配管を
介して供給される冷却水を鋼管内面に噴射する周方向に
複数の冷却水噴射口を形成した内面冷却ノズルと、同じ
く配管を介して供給される冷却水を鋼管外面に噴射する
周方向に複数の冷却水噴射口を形成した外面冷却ノズル
と、これらの内面及び外面冷却ノズル、又は鋼管を鋼管
軸方向に駆動する駆動機構を設けたことを特徴とする熱
処理鋼管の酸洗前処理装置。1. An apparatus for performing a pretreatment of pickling for removing scale generated on the inner and outer surfaces of a heat-treated steel pipe, comprising a plurality of circumferentially jetting cooling water supplied through the pipe on the inner surface of the steel pipe. An inner cooling nozzle having a cooling water injection port, an outer cooling nozzle having a plurality of cooling water injection ports in the circumferential direction for injecting cooling water supplied through a pipe to the outer surface of the steel pipe, and the inner and outer surfaces thereof. A pickling pretreatment device for a heat-treated steel pipe, comprising a cooling nozzle or a drive mechanism for driving the steel pipe in the axial direction of the steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4276493U JPH0712468U (en) | 1993-08-04 | 1993-08-04 | Pre-pickling equipment for heat-treated steel pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4276493U JPH0712468U (en) | 1993-08-04 | 1993-08-04 | Pre-pickling equipment for heat-treated steel pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0712468U true JPH0712468U (en) | 1995-02-28 |
Family
ID=12645054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4276493U Pending JPH0712468U (en) | 1993-08-04 | 1993-08-04 | Pre-pickling equipment for heat-treated steel pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011016084A (en) * | 2009-07-09 | 2011-01-27 | Nippon Steel Corp | Apparatus of removing foreign material and method of removing the same |
-
1993
- 1993-08-04 JP JP4276493U patent/JPH0712468U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011016084A (en) * | 2009-07-09 | 2011-01-27 | Nippon Steel Corp | Apparatus of removing foreign material and method of removing the same |
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