JPS6214007B2 - - Google Patents
Info
- Publication number
- JPS6214007B2 JPS6214007B2 JP14063081A JP14063081A JPS6214007B2 JP S6214007 B2 JPS6214007 B2 JP S6214007B2 JP 14063081 A JP14063081 A JP 14063081A JP 14063081 A JP14063081 A JP 14063081A JP S6214007 B2 JPS6214007 B2 JP S6214007B2
- Authority
- JP
- Japan
- Prior art keywords
- header
- cooling
- slit
- cooling water
- pipe
- 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
Links
- 238000001816 cooling Methods 0.000 claims description 24
- 239000000498 cooling water Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】
本発明は、スリツト・タイプのノズルを有する
冷却ヘツダとパイプ・タイプのノズルを有する冷
却ヘツダとを用いて熱間材料を冷却する方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cooling hot material using a cooling header having a slit-type nozzle and a cooling header having a pipe-type nozzle.
スリツト・タイプのノズルを有する冷却ヘツダ
（以下、単にスリツト・ヘツダという。）によつて
熱間圧延鋼材等の熱間材料を冷却する場合は、ノ
ズルから噴出される冷却水が切れ目のない幅広の
カーテン状の層流となつて落下するため、熱間材
料表面を均一に冷却する手段としては極めて有効
なものである。しかしながら、冷却装置は多数の
スリツト・ヘツダを一定の間隔で設置して同時に
作動するものであるので、第１図および第２図に
示すように例えばスリツト・ヘツダN1において
は、隣接するスリツト・ヘツダN2から落下され
た冷却水１２の一部が材料１上を流れてヘツダ
N1の噴出直下領域に達するいわゆる干称が生じ
る。このため、ヘツダN1から噴出された冷却水
１１が直接に材料１の表面に対して有効に作用せ
ず、その結果、冷却効果を低下させていた。この
傾向は、スリツト・タイプのノズルを有する冷却
ヘツダにおいては特に顕著に現われていた。しか
るに、従来の冷却手段においてはこのような冷却
水の干渉現象についての対策が何ら施されていな
い実情にある。 When cooling hot materials such as hot rolled steel with a cooling header having a slit-type nozzle (hereinafter simply referred to as a slit header), the cooling water spouted from the nozzle flows into a wide, continuous stream. Since it falls in a curtain-like laminar flow, it is extremely effective as a means for uniformly cooling the surface of a hot material. However, since the cooling system operates simultaneously by installing a large number of slit headers at regular intervals, for example, in slit header N1 , as shown in FIGS. A part of the cooling water 12 dropped from the header N2 flows over the material 1 and reaches the header.
A so-called dry spell occurs that reaches the area immediately below the N 1 eruption. For this reason, the cooling water 11 spouted from the header N 1 did not directly act effectively on the surface of the material 1, resulting in a reduction in the cooling effect. This tendency was particularly noticeable in cooling headers having slit-type nozzles. However, the current situation is that conventional cooling means do not take any measures against such interference phenomenon of cooling water.
一方、従来から広く使用されている冷却ヘツダ
として、パイプ・タイプのノズルを有する冷却ヘ
ツダ（以下、単にパイプ・ヘツダという。）があ
る。このパイプ・ヘツダ３は、第３図に示すよう
に、多数のパイプ・ノズル３１を備えていて、各
ノズルから落下する冷却水が局所的に互いに干渉
し合うので、圧延材１上に滞留した冷却水が一団
となつて勢いよく圧延方向に流れるという現象は
起こらない。しかし、このパイプ・ヘツダは前述
のスリツト・ヘツダよりも冷却能力の点では劣
る。 On the other hand, as a cooling header that has been widely used in the past, there is a cooling header having a pipe type nozzle (hereinafter simply referred to as a pipe header). As shown in FIG. 3, this pipe header 3 is equipped with a large number of pipe nozzles 31, and the cooling water falling from each nozzle locally interferes with each other, so that the cooling water stagnates on the rolled material 1. A phenomenon in which the cooling water flows all together and vigorously in the rolling direction does not occur. However, this pipe header has a lower cooling capacity than the slit header described above.
したがつて、本発明の目的は、スリツト・ヘツ
ダを冷却の主要設備として使用し、スリツト・ヘ
ツダ間にパイプ・ヘツダを補助的に使用すること
によつて冷却水の干渉を防止し、有効で信頼性の
ある熱間材料の冷却方法を提供することにある。 Therefore, an object of the present invention is to use a slit header as the main equipment for cooling, and to use a pipe header as an auxiliary between the slit header to prevent interference of cooling water and to effectively achieve the same. The object of the present invention is to provide a reliable method for cooling hot materials.
本発明の冷却方法は、スリツト・ヘツダの間に
複数個のパイプ・ヘツダを設置して、各スリツ
ト・ヘツダから熱間圧延材料上に落下した冷却水
の干渉を防止することを特徴としている。 The cooling method of the present invention is characterized in that a plurality of pipe headers are installed between the slit headers to prevent interference of cooling water falling from each slit header onto the hot rolled material.
第４図は、本発明の方法にもとづく冷却ヘツダ
の配置例を示す。スリツト・ヘツダ２を所定の間
隔で配置し、そして、各スリツト・ヘツダ２の間
に複数個（本実施例では３個）のパイプ・ヘツダ
３を置設する。 FIG. 4 shows an example of a cooling header arrangement according to the method of the invention. Slit headers 2 are arranged at predetermined intervals, and a plurality of (three in this embodiment) pipe headers 3 are installed between each slit header 2.
このようにヘツダを配置することによつて、隣
接するスリツト・ヘツダ２から落下する冷却水１
１，１２は、熱間圧延材料１上に滞留するが、パ
イプ・ヘツダ３から落下する冷却水１３によつて
互いに干渉しない。 By arranging the headers in this way, the cooling water 1 falling from the adjacent slit header 2
1 and 12 remain on the hot rolled material 1 but do not interfere with each other due to the cooling water 13 falling from the pipe header 3.
＜実施例＞
熱間圧延材料厚み：3.5mm
通板速度：500m／min
圧延機出口温度：870℃
スリツト・ヘツダ入口温度：670℃
巻取温度：550℃
スリツト・ヘツダ・ピツチ：6m×６基
（各スリツト・ヘツダ間隔）
パイプ・ヘツダ・ピツチ：1m×５基
（各ヘツダ間隔）
冷却結果：第５図
第５図において、曲線Ａは本発明法による結果
を、また曲線Ｂは比較のための従来法の結果をそ
れぞれ示す。図からわかるように、本発明の方法
によれば、同一流量の冷却水によつて従来法によ
るよりも約20％の冷却効果の向上を図ることがで
きる。<Example> Hot rolled material thickness: 3.5 mm Threading speed: 500 m/min Rolling mill outlet temperature: 870°C Slit header inlet temperature: 670°C Coiling temperature: 550°C Slit header pitch: 6 m x 6 units (Each slit/header spacing) Pipe/Header/Pitch: 1m x 5 (Each header spacing) Cooling result: Figure 5 In Figure 5, curve A shows the results obtained by the method of the present invention, and curve B shows the results for comparison. The results of the conventional method are shown respectively. As can be seen from the figure, according to the method of the present invention, the cooling effect can be improved by about 20% compared to the conventional method using the same flow rate of cooling water.
第１図はスリツト・ヘツダによる材料上の冷却
水の干渉形態を誇張して示す側面図。第２図は第
１図の平面図。第３図はパイプ・ヘツダによる冷
却水の冷却形態を誇張して示す側面図。第４図は
本発明の方法にもとづいて配置された冷却ヘツダ
の一実施例の側面図。第５図は水量密度と熱伝達
率との関係について従来法と本発明法とを比較実
験した結果を示すグラフ。
１……熱間材料、２……スリツト・ヘツダ、３
……パイプ・ヘツダ、１１，１２，１３……冷却
水。
FIG. 1 is a side view exaggerating the form of interference of cooling water on the material by the slit header. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a side view showing an exaggerated form of cooling water using pipes and headers. FIG. 4 is a side view of one embodiment of a cooling header arranged according to the method of the present invention. FIG. 5 is a graph showing the results of a comparative experiment between the conventional method and the method of the present invention regarding the relationship between water density and heat transfer coefficient. 1...Hot material, 2...Slit header, 3
...Pipe header, 11, 12, 13...Cooling water.
Claims (1)
ダの間にパイプ・タイプのノズルを有する複数個
の冷却ヘツダを設置して、前記の各スリツト・ヘ
ツダから熱間材料上に落下した冷却水の干渉を、
前記のパイプ・ヘツダから落下した冷却水によつ
て防止することを特徴とした熱間材料の冷却方
法。1. A plurality of cooling headers having pipe-type nozzles are installed between cooling headers having slit-type nozzles to prevent interference of cooling water falling onto the hot material from each of the slit-type nozzles.
A method for cooling hot materials, characterized in that cooling is prevented by cooling water falling from the pipe/header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14063081A JPS5842718A (en) | 1981-09-07 | 1981-09-07 | Cooling method for hot worked material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14063081A JPS5842718A (en) | 1981-09-07 | 1981-09-07 | Cooling method for hot worked material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5842718A JPS5842718A (en) | 1983-03-12 |
| JPS6214007B2 true JPS6214007B2 (en) | 1987-03-31 |
Family
ID=15273156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14063081A Granted JPS5842718A (en) | 1981-09-07 | 1981-09-07 | Cooling method for hot worked material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842718A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638814B2 (en) * | 1988-09-08 | 1994-05-25 | ユニ・チャーム株式会社 | Absorbent body for absorbent article and manufacturing method thereof |
-
1981
- 1981-09-07 JP JP14063081A patent/JPS5842718A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638814B2 (en) * | 1988-09-08 | 1994-05-25 | ユニ・チャーム株式会社 | Absorbent body for absorbent article and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5842718A (en) | 1983-03-12 |
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