JP4972326B2 - nozzle - Google Patents

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JP4972326B2
JP4972326B2 JP2006063509A JP2006063509A JP4972326B2 JP 4972326 B2 JP4972326 B2 JP 4972326B2 JP 2006063509 A JP2006063509 A JP 2006063509A JP 2006063509 A JP2006063509 A JP 2006063509A JP 4972326 B2 JP4972326 B2 JP 4972326B2
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width direction
cut groove
nozzle
injection
holes
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JP2007237086A (en
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康一 堤
淳 久保田
憲男 大西
勝則 沖本
利昭 水本
久継 中野
平太 岡本
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JFE Steel Corp
H Ikeuchi and Co Ltd
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H Ikeuchi and Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/048—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like having a flow conduit with, immediately behind the outlet orifice, an elongated cross section, e.g. of oval or elliptic form, of which the major axis is perpendicular to the plane of the jet

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  • Continuous Casting (AREA)
  • Nozzles (AREA)

Description

本発明はノズルに関し、詳しくは、水と空気からなる気液混合の二流体のみならず、水からなる一流体にも使用でき、長さ方向において均等で、直交する幅方向において大きく（即ち、厚幅）に噴射でき、例えば、連続鋳造装置の二次冷却帯に連続的に引き出される鋳片に対して冷却水噴霧用、洗浄用、エッチング用等として好適に用いられるものである。   The present invention relates to a nozzle, and more specifically, it can be used not only for two fluids of gas-liquid mixing consisting of water and air, but also for one fluid consisting of water, and is uniform in the length direction and large in the orthogonal width direction (that is, For example, it can be suitably used for cooling water spraying, cleaning, etching, etc. on a cast piece continuously drawn out to a secondary cooling zone of a continuous casting apparatus.

従来、連続鋳造装置の二次冷却帯では並設されたロール間に多数ノズルを間隔をあけて並設し、噴霧範囲をラップさせて鋳片全面に冷却ミストを噴射して未冷却部分の発生をなくすと共に、冷却ムラを発生しないようにしている。   Conventionally, in the secondary cooling zone of a continuous casting machine, multiple nozzles are arranged side by side between the rolls arranged side by side, the spray range is wrapped, and cooling mist is sprayed on the entire surface of the slab to generate uncooled parts. In addition, the cooling unevenness is prevented from occurring.

この種の鋳片冷却用のノズルとしては、本出願人は先に特開平５−３２９４０２号において、図９に示す二流体ノズルを提供している。
該ノズル１はノズル本体１の中心軸線にそった気液混合流路の先端を円弧形状として主孔２を設けると共に、その両側に副孔３を設け、噴射側頂面に直径方向に設けた切り込み４を主孔２および副孔３と連通させて噴射孔５を設けている。 As this type of slab cooling nozzle, the present applicant previously provided a two-fluid nozzle shown in FIG. 9 in Japanese Patent Laid-Open No. 5-329402.
The nozzle 1 is provided with a main hole 2 having an arc shape at the tip of the gas-liquid mixing channel along the central axis of the nozzle body 1, and provided with sub-holes 3 on both sides thereof, and provided in the diametrical direction on the injection side top surface. An injection hole 5 is provided by communicating the notch 4 with the main hole 2 and the sub hole 3.

前記ノズルでは、噴霧パターンが両側のスソ引き部分が短い台形状となり、噴射範囲がラップした部分とラップしていない部分の流量、打力および粒子径の均等化が図られる。かつ、流量制御範囲のターンダウン比を１：２０以上の広い範囲に変動しても、前記ラップした部分とラップしていない部分との流量、打力、粒子径の変動が抑制できる利点を有するものである。   In the nozzle, the spray pattern has a trapezoidal shape with short skirts on both sides, and the flow rate, striking force, and particle diameter of the portion where the injection range is wrapped and the portion where it is not wrapped are equalized. In addition, even if the turndown ratio of the flow rate control range is changed to a wide range of 1:20 or more, there is an advantage that fluctuations in flow rate, striking force, and particle diameter between the wrapped portion and the unwrapped portion can be suppressed. Is.

一般に二流体ノズルでは、空気量の割合を増大させると、厚さ方向の噴霧範囲を広がる一方、空気量の割合を減少させると噴霧範囲が狭くなる。
図９に示すノズルでは、空気量の割合を減少させると、図１０（Ａ）（Ｂ）に示すように、噴射孔５の長さ方向Ｘに対して直交する幅方向Ｙの噴霧角度が狭くなる傾向がある。
近時、冷却速度をスピード化と省エネルギーの観点より、高圧空気の使用量を減少させることが要望されており、前記二流体ノズルにおいて空気量の割合を減少させても厚さ方向の噴霧角度を減少させないことが課題となる。 In general, in the two-fluid nozzle, when the ratio of the air amount is increased, the spray range in the thickness direction is expanded, while when the ratio of the air amount is decreased, the spray range is narrowed.
In the nozzle shown in FIG. 9, when the ratio of the air amount is decreased, the spray angle in the width direction Y perpendicular to the length direction X of the injection hole 5 becomes narrow as shown in FIGS. Tend to be.
Recently, from the viewpoint of speeding up the cooling rate and saving energy, it has been demanded to reduce the amount of high-pressure air used, and even if the proportion of the air amount is reduced in the two-fluid nozzle, the spray angle in the thickness direction can be reduced. The problem is not to reduce it.

前記問題に対して、本出願人は特開２００４−１６８４６号（特許文献２）において、図１１（Ａ）（Ｂ）に示す如き、ノズル本体の中心軸線に沿た流路の噴射側先端を円弧状の主孔２とし、該ノズル本体の噴射側先端の平坦面に直径方向の切り込み４を設けると共に、該切り込み４は長さ方向の両端より中心に向けて深さ方向に傾斜させ、該切り込みの中央部を前記主孔３の先端と連通させて幅の長い噴射孔５を設け、かつ、前記主孔２の基部に、前記切り込み４と平行なデフレクタ６を噴射孔５と対向させて流路を横断させて取り付け、前記流入口側より流入する流体を前記デフレクタ６と衝突させて前記主噴射孔５の長さ方向と直交する幅方向に分流させ、幅方向の噴霧角度を増大させるノズルを提供している。   In order to solve the above problem, the present applicant in JP-A-2004-16846 (Patent Document 2) shows the ejection side tip of the flow path along the central axis of the nozzle body as shown in FIGS. The arcuate main hole 2 is provided, and a notch 4 in the diametrical direction is provided on the flat surface at the tip of the injection side of the nozzle body, and the notch 4 is inclined in the depth direction from both ends in the length direction, A long injection hole 5 is provided by communicating the center of the cut with the tip of the main hole 3, and a deflector 6 parallel to the cut 4 is opposed to the injection hole 5 at the base of the main hole 2. Attached across the flow path, the fluid flowing in from the inlet side collides with the deflector 6 and is shunted in the width direction perpendicular to the length direction of the main injection hole 5 to increase the spray angle in the width direction. Provides nozzles.

前記構成によれば、流体がデフレクタ６と衝突して噴射孔５の長さ方向と直交する幅方向に分流され、幅方向へ拡がりを持たせた後に、噴射孔５より噴射させているため、噴射孔５の長さ方向と直交する幅方向の噴射角度を広げることができる。よって、気液混合の二流体の空気量の割合を減少させても、デフレクタを取り付けていることにより、長さ方向の噴射角度を減少させず、かつ、幅方向の噴射角度が広がったことにより、冷却効果を高めることができる。   According to the above configuration, the fluid collides with the deflector 6 and is diverted in the width direction orthogonal to the length direction of the injection hole 5, and after being expanded in the width direction, is injected from the injection hole 5. The injection angle in the width direction orthogonal to the length direction of the injection holes 5 can be widened. Therefore, even if the ratio of the amount of air of the two fluids of gas-liquid mixing is reduced, by attaching the deflector, the injection angle in the length direction is not reduced and the injection angle in the width direction is expanded. , Can enhance the cooling effect.

しかしながら、特許文献２のノズルにおいても、主孔２の基部にデフレクタ６に衝突させて分流を発生させて幅方向の噴霧角度を広げているだけであるため、図１２（Ａ）（Ｂ）幅方向の噴霧範囲および噴霧量の均等化が困難で、改善の余地があった。   However, in the nozzle of Patent Document 2 as well, only the spray angle in the width direction is widened by causing the base 6 of the main hole 2 to collide with the deflector 6 to generate a diverted flow. It was difficult to equalize the spray range and spray amount in the direction, and there was room for improvement.

特開平５−３２９４０２号公報JP-A-5-329402 特開２００４−１６８４６号公報JP 2004-16846 A

本発明は前記課題を解決せんとするもので、幅方向において噴霧範囲を広げながら噴霧量を均等化することを課題としている。   The present invention has been made to solve the above-mentioned problems, and an object thereof is to equalize the spray amount while expanding the spray range in the width direction.

本発明は、前記課題を解決するため、ノズル本体の中心軸線に沿って、一端の流入口より他端の噴射側に向けて流入路を設け、該流入路の噴射側先端にノズル本体の中心から幅方向の両側に、先端を円弧状とした一対の主孔を設ける一方、
前記ノズル本体の噴射側の平坦状の頂面に、前記幅方向と直交方向で且つノズル本体の中心を通る直径方向の広幅の切込溝を設け、該切込溝は長さ方向の両端より中心に向けて深さ方向に傾斜させ、前記一対の主孔と連通させて一対の噴射孔を設け、かつ、前記切込溝の幅方向の両側壁を前記頂面に向けて近接する方向に傾斜させ、該切込溝の幅方向断面を台形状としていることを特徴とするノズルを提供している。 In order to solve the above-mentioned problem, the present invention provides an inflow path from the inlet at one end to the injection side at the other end along the central axis of the nozzle body, and the center of the nozzle body at the tip of the injection side of the inflow path While providing a pair of main holes with arc-shaped tips on both sides in the width direction from
The flat top surface on the injection side of the nozzle body is provided with a diametrically wide cut groove that is perpendicular to the width direction and passes through the center of the nozzle body, and the cut groove is formed from both ends in the length direction. Inclined in the depth direction toward the center, provided with a pair of injection holes in communication with the pair of main holes, and in a direction in which both side walls in the width direction of the cut groove are close to the top surface A nozzle is provided that is inclined and has a cross section in the width direction of the cut groove formed in a trapezoidal shape.

前記構成のノズルでは、噴射側の平坦状の頂面に直径方向に切り込んだ切込溝の長さ方向と直交する幅方向の中央両側に近接して一対の噴射孔を設け、幅方向の２つの噴射孔より流体を噴射することで、幅方向の噴射範囲を広げて、噴霧の幅を広げる（所謂、噴霧の厚さを大とする）ことができる。かつ、このように２つの噴射孔で幅方向の噴射範囲を広げながら、切込溝の両側壁を頂面に向けて近接させているため、幅方向の噴霧を拡散させず、幅方向の噴霧範囲を所定幅に均等化させて噴霧量の均等化を図ることができる。
さらに、幅方向と直交する長さ方向においても、直径方向に切り込んだ切込溝の両側壁で噴霧を長さ方向にガイドしていることで、長さ方向の噴射範囲も均等化することができると共に噴霧量の均等化も図ることができる。 In the nozzle having the above-described configuration, a pair of injection holes are provided close to both sides of the center in the width direction perpendicular to the length direction of the cut groove cut in the diameter direction on the flat top surface on the injection side, and 2 in the width direction. By injecting fluid from one injection hole, the injection range in the width direction can be expanded, and the spray width can be increased (so-called spray thickness is increased). Moreover, since the both side walls of the cut groove are brought close to the top surface while expanding the injection range in the width direction with the two injection holes in this way, the spray in the width direction is not diffused without spreading the spray in the width direction. It is possible to equalize the spray amount by equalizing the range to a predetermined width.
Furthermore, even in the length direction orthogonal to the width direction, the spray range in the length direction can be equalized by guiding the spray in the length direction with both side walls of the cut grooves cut in the diameter direction. In addition, the spray amount can be equalized.

前記一対の噴射孔は、長さ方向が長軸で、幅方向が短軸となる楕円孔とし、
前記切込溝の底面の長さ方向の中心に向けた傾斜角度で噴霧範囲の長さ寸法を調整し、切込溝の幅方向の両側壁の傾斜角度で噴霧範囲の幅方向寸法を調整している。 The pair of injection holes are elliptical holes having a major axis in the length direction and a minor axis in the width direction,
The length dimension of the spray range is adjusted by the inclination angle toward the center of the length direction of the bottom surface of the cut groove, and the width direction dimension of the spray range is adjusted by the inclination angle of both side walls in the width direction of the cut groove. ing.

即ち、楕円形状の噴射孔の長軸寸法を大とすると、噴霧の長さ方向を大とすることができ、短軸方向を大とすると、噴霧の幅方向を大とすることができる。しかしながら、供給する流体量、流体圧が一定であると、長さ方向および幅方向の両方を大とすると、噴霧範囲における噴霧量は小さくなり、例えば、冷却用とすると冷却能力が低下する。
よって、噴霧範囲の全体における均等な噴霧量をある程度確保するには、長さ方向を増大として、幅方向は減少し、細長い楕円形状の噴霧範囲とするか、長さ方向を減少して、幅方向を増大させ、円形に近い楕円形状の噴霧範囲とするかは、ノズルを使用する用途に応じて設定することが好ましいこととなる。
本発明では、前記切込溝の長さ方向の中心に向かう傾斜角度により、楕円形状の噴射孔の長軸寸法を調整できると共に、切込溝の両側壁の傾斜角度により、楕円形状の噴射孔の短軸寸法を調整でき、用途に応じた噴霧パターンを備えたノズルとすることができる。 That is, when the major axis dimension of the elliptical injection hole is increased, the spray length direction can be increased, and when the minor axis direction is increased, the spray width direction can be increased. However, if the amount of fluid to be supplied and the fluid pressure are constant, if both the length direction and the width direction are increased, the amount of spray in the spray range becomes small. For example, when cooling is used, the cooling capacity decreases.
Therefore, in order to ensure a certain amount of uniform spray amount in the entire spray range, the length direction is increased and the width direction is decreased, so that the spray range has an elongated elliptical shape, or the length direction is decreased and the width is decreased. Whether or not the direction is increased and the spray range is an elliptical shape close to a circle is preferably set according to the application in which the nozzle is used.
In the present invention, the major axis dimension of the elliptical injection hole can be adjusted by the inclination angle toward the longitudinal center of the cut groove, and the elliptical injection hole can be adjusted by the inclination angle of both side walls of the cut groove. It is possible to adjust the minor axis dimension of the nozzle and to provide a nozzle having a spray pattern according to the application.

前記切込溝の底面の長さ方向の中心に向かう下方傾斜角度は２０゜〜７０゜の範囲であることが好ましい。また、切込溝の両側壁の下方傾斜角度は５°〜４０°、好ましくは１０°〜３０°である。
また、一対の楕円形状の噴射孔の長軸寸法：短軸寸法の比は５：１〜１．５：１の範囲とすることが好ましい。
さらに、噴射孔は、平坦状頂面から深さ５ｍｍ〜２０ｍｍの位置に設けることが好ましい。 The downward inclination angle toward the center in the length direction of the bottom surface of the cut groove is preferably in the range of 20 ° to 70 °. The downward inclination angle of both side walls of the cut groove is 5 ° to 40 °, preferably 10 ° to 30 °.
The ratio of the major axis dimension to the minor axis dimension of the pair of elliptical injection holes is preferably in the range of 5: 1 to 1.5: 1.
Furthermore, it is preferable that the injection hole is provided at a depth of 5 mm to 20 mm from the flat top surface.

前記切込溝は長さ方向の両端から中心に向けて次第に幅狭となるように傾斜させていることが好ましい。この傾斜角度は１０゜〜３０゜、好ましくは１４゜〜１５゜である。
このように、切込溝を長さ方向の両端に向けて広げることで、幅方向の噴霧範囲を増大させることができる。 It is preferable that the cut groove is inclined so as to become gradually narrower from both ends in the length direction toward the center. This inclination angle is 10 ° to 30 °, preferably 14 ° to 15 °.
Thus, the spray range in the width direction can be increased by widening the cut groove toward both ends in the length direction.

前記切込溝は、詳細には、幅方向の中心の主切込溝と、該主切込溝の幅方向の両側に更に切り込んだ一対の副切込溝とからなる段状とし、
前記主切込溝の溝底面を平坦面とすると共に、幅方向の両側を長さ方向の両端に向けて幅狭となるように傾斜させている一方、
前記副切込溝の溝底面を長さ方向の両端より中心に向けて深さ方向に傾斜させて、前記一対の主孔と連通する前記一対の噴射孔を設け、かつ、各副切込溝の両側壁のうち外側壁を前記平坦状頂面まで連続する傾斜壁とすると共に、主切込溝側の内側壁も外側に傾斜させていることが好ましい。 Specifically, the cut groove has a step shape including a main cut groove at the center in the width direction and a pair of sub cut grooves further cut on both sides in the width direction of the main cut groove,
While the bottom surface of the main cut groove is a flat surface, both sides in the width direction are inclined to be narrow toward both ends in the length direction,
Inclining the groove bottom surface of the sub cut groove in the depth direction from both ends in the length direction to provide the pair of injection holes communicating with the pair of main holes, and each sub cut groove Of the two side walls, the outer wall is preferably an inclined wall that continues to the flat top surface, and the inner wall on the main cut groove side is preferably inclined outward.

前記のように、切込溝を溝底面の中央に段状突起部を設け、その両側に深溝の副切込溝を設け、これら副切込溝の溝底面を前記一対の主孔の先端部側と連通させて一対の噴射孔を設けると、切込溝の溝底面全体を平坦面とした場合と比較して、噴射孔を長軸方向に対して短軸方向を対称とした楕円形状とすることができる。
また、各噴射孔は、副切込溝の溝底面に開口する楕円状の噴射孔と、該噴射孔と連通して、副切込溝の対向する両側壁に開口する直交方向の半円形状の噴射孔とから構成することができる。
このように 溝底面の噴射孔の幅方向の両側に連通した垂直方向の噴射孔を設けると、各噴射孔から噴射される噴霧量を、噴霧範囲の幅方向両側端まで略均等とすることができ、幅方向の噴霧量の均等化をより促進することができる。 As described above, the cut groove is provided with a stepped protrusion at the center of the groove bottom surface, deep groove sub cut grooves are provided on both sides thereof, and the groove bottom surfaces of the sub cut grooves are arranged at the tip portions of the pair of main holes. When a pair of injection holes are provided in communication with the side, the injection hole has an elliptical shape in which the minor axis direction is symmetrical with respect to the major axis direction as compared with the case where the entire groove bottom surface of the cut groove is a flat surface. can do.
Each injection hole has an elliptical injection hole that opens in the groove bottom surface of the sub cut groove, and a semicircular shape in the orthogonal direction that communicates with the injection hole and opens in opposite side walls of the sub cut groove. The injection hole can be configured.
Thus, by providing vertical injection holes that communicate with both sides in the width direction of the injection holes on the bottom surface of the groove, the amount of spray injected from each injection hole can be made substantially uniform up to both ends in the width direction of the spray range. It is possible to further promote equalization of the spray amount in the width direction.

前記一対の主孔の軸線は、ノズル本体の軸線と平行としてもよいし、ノズル本体の軸線に対してノズル中心に向けて傾斜、あるいはノズル本体の軸線に対してノズル中心より離れる方向に傾斜させてもよい。   The axis of the pair of main holes may be parallel to the axis of the nozzle body, or may be inclined toward the center of the nozzle with respect to the axis of the nozzle body, or may be inclined in a direction away from the nozzle center with respect to the axis of the nozzle body. May be.

また、前記一対の主孔の間のノズル本体の中心に、前記流入路の中心に連通する副孔を設け、該副孔を両側の前記主孔と連通させ、該副孔の先端を円弧形状とすることが好ましい。
前記のように一対の主孔の近接側を副孔を介して連通すると、長さ方向の噴霧範囲を広くしながら噴霧量を均等化とすることができる。 In addition, a sub-hole communicating with the center of the inflow passage is provided at the center of the nozzle body between the pair of main holes, the sub-hole communicates with the main holes on both sides, and the tip of the sub-hole is formed in an arc shape. It is preferable that
As described above, when the proximity sides of the pair of main holes communicate with each other through the sub holes, the spray amount can be equalized while the spray range in the length direction is widened.

本発明のノズルは、液体とエアの二流体用として好適に用いることができるが、液体のみの一流体用としても用いることができる。
特に、水とエアの気液混合の二流体用とし、連続鋳造装置の二次冷却帯においてロール間に並設する冷却水噴射用として噴霧し、前記ロールによって連続的に引き出される鋳片の全面に対して噴霧することが好ましい。 The nozzle of the present invention can be suitably used for two fluids of liquid and air, but can also be used for one fluid only of liquid.
In particular, it is used for two fluids of gas-liquid mixture of water and air, sprayed for cooling water injection arranged between rolls in a secondary cooling zone of a continuous casting apparatus, and the entire surface of the slab continuously drawn by the roll It is preferable to spray against.

上述したように、本発明のノズルは、長さ方向を長軸とした楕円状の一対の噴射孔からの噴射で長さ方向の噴射角度を広げていると共に、噴射孔を幅方向に近接して一対設けていることで幅方向の噴射角度も広げ厚幅とすることができる。
かつ、このように２つの噴射孔で幅方向の噴射範囲を広げながら、切込溝の両側壁を頂面に向けて近接させているため、幅方向の噴霧を拡散させず、幅方向の噴霧範囲を所定幅に均等化させて噴霧量の均等化を図ることができる。
さらに、幅方向と直交する長さ方向においても、直径方向に切り込んだ切込溝の両側壁で噴霧を長さ方向にガイドしていることで、長さ方向の噴射範囲も均等化することができると共に噴霧量の均等化も図ることができる
よって、二流体ノズルとする場合、空気量の割合を減少させても幅方向の噴射角度が減少させないと共に幅方向における噴霧を均等化できる。かつ、水量の割合が増加することで、冷却速度を速めることができる。よって、鋳片冷却用として前記ノズルを配置した時に、各ノズルへの供給空気量の割合を低減して、エネルギーの省力化を図ることができ、大幅なランニングコストの削減を図ることができると同時に、冷却速度も早くすることができる。 As described above, the nozzle of the present invention expands the injection angle in the length direction by injection from a pair of elliptical injection holes whose longitudinal axis is the length direction, and brings the injection holes close to the width direction. By providing a pair, the injection angle in the width direction can be widened and the thickness can be increased.
Moreover, since the both side walls of the cut groove are brought close to the top surface while expanding the injection range in the width direction with the two injection holes in this way, the spray in the width direction is not diffused without spreading the spray in the width direction. It is possible to equalize the spray amount by equalizing the range to a predetermined width.
Furthermore, even in the length direction orthogonal to the width direction, the spray range in the length direction can be equalized by guiding the spray in the length direction with both side walls of the cut grooves cut in the diameter direction. In addition, since the spray amount can be equalized, when the two-fluid nozzle is used, the spray angle in the width direction can be equalized and the spray angle in the width direction cannot be decreased even if the ratio of the air amount is decreased. And the cooling rate can be accelerated | stimulated because the ratio of the amount of water increases. Therefore, when the nozzles are arranged for cooling the slab, the ratio of the amount of air supplied to each nozzle can be reduced, energy can be saved, and the running cost can be greatly reduced. At the same time, the cooling rate can be increased.

以下、本発明の実施形態を図面を参照して説明する。
図１乃至図６は第１実施形態のノズルを示す。
該ノズルは、ノズル本体１０は中心軸線Ｌに沿った形成した流入路１１の基端を気液混合液の流入口１２とし、該流入口１２の噴射側先端に先端を円弧状の閉鎖面１３を設けている。
前記閉鎖面１３から噴射側に向けて、ノズル本体の中心軸線Ｌを挟んで幅方向の左右両側に一対の主孔１４（１４Ａ、１４Ｂ）を設けている。また、これら主孔１４Ａと１４Ｂはノズル本体１０の中心軸線Ｌと平行に設け、かつ、その間にノズル本体１０の中心軸線に沿って副孔１５を設け、副孔１５の両側面を主孔１４Ａ、１４Ｂの近接側の側面と連通させている。これら主孔１４および副孔１５の先端は円弧形状としている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show the nozzle of the first embodiment.
The nozzle body 10 has a gas-liquid mixed solution inlet 12 at the base end of the inflow passage 11 formed along the central axis L of the nozzle body 10, and a circular arc-shaped closing surface 13 at the tip of the injection side of the inlet 12. Is provided.
A pair of main holes 14 (14A, 14B) are provided on both the left and right sides in the width direction across the central axis L of the nozzle body from the closing surface 13 toward the injection side. The main holes 14A and 14B are provided in parallel with the central axis L of the nozzle body 10, and the auxiliary holes 15 are provided along the central axis of the nozzle body 10 between them. , 14B is in communication with the side surface on the close side. The leading ends of the main hole 14 and the sub hole 15 have an arc shape.

ノズル本体１０の噴射側先端は平坦状の頂面１６とし、該頂面１６には、前記一対の主孔１４Ａと１４Ｂを結ぶ幅方向線Ｘと直交方向で且つノズル本体１０の中心を通る直径方向の広幅な切込溝２０を設けている。該切込溝２０の幅方向の対向する両側壁２１（２１Ａ、２１Ｂ）は頂面１６に向けて互いに近接する方向に傾斜させた傾斜壁とし、切込溝２０を幅方向断面で略台形状としている。かつ、両側壁２１は長さ方向の両端から中心に向けて近接させた傾斜させて「く」の字状とし、中央部を幅狭、両端を幅広としている。   The ejection side tip of the nozzle body 10 has a flat top surface 16, and the top surface 16 has a diameter passing through the center of the nozzle body 10 in a direction perpendicular to the width direction line X connecting the pair of main holes 14A and 14B. A wide cut groove 20 is provided in the direction. Both side walls 21 (21A, 21B) facing each other in the width direction of the cut groove 20 are inclined walls that are inclined toward each other toward the top surface 16, and the cut groove 20 is substantially trapezoidal in cross section in the width direction. It is said. In addition, the side walls 21 are slanted toward the center from both ends in the length direction to form a “<” shape, with a narrow central portion and wide ends.

前記切込溝２０は、幅方向の中心の主切込溝２５と、該主切込溝２５の幅方向の両側に更に切り込んだ一対の副切込溝２６（２６Ａ、２６Ｂ）とからなる段状としている。
主切込溝２０の溝底面２０ａを平坦面とすると共に、該溝底面２０ａの幅方向の両側２０ｂを長さ方向の両端に向けて幅狭となるように傾斜させている。
一方、両側の副切込溝２６の溝底面２６ａを長さ方向の両端より中心に向けて深さ方向に傾斜させて切り込んでいる。これにより、前記一対の主孔１４と連通させて、ノズル本体１０の中心軸線Ｌを挟んで幅方向に左右一対の噴射孔３０（３０Ａ、３０Ｂ）を設けている。 The cut groove 20 includes a main cut groove 25 at the center in the width direction and a pair of sub cut grooves 26 (26A, 26B) further cut on both sides of the main cut groove 25 in the width direction. It is in the shape.
The groove bottom surface 20a of the main cut groove 20 is a flat surface, and both width sides 20b of the groove bottom surface 20a are inclined so as to narrow toward both ends in the length direction.
On the other hand, the groove bottom surfaces 26a of the sub-cut grooves 26 on both sides are cut by being inclined in the depth direction from both ends in the length direction toward the center. Thus, a pair of left and right injection holes 30 (30A, 30B) are provided in the width direction so as to communicate with the pair of main holes 14 and sandwich the central axis L of the nozzle body 10.

前記各副切込溝２６の両側壁のうち外側壁２６ｂが前記頂面１６まで連続する傾斜した両側壁２１となると共に、主切込溝側の内側壁２６ｃも外側に傾斜させている
各副切込溝２６と主孔１４と連通して形成する前記一対の噴射孔３０は、溝底面２６ａに開口する細長い水平方向の楕円状部３０ａと、該楕円形状部３０ａの両側と連通して外側壁２６ｂと内側側２６ｃに夫々形成される垂直方向の半円状部３０ｂ、３０ｃとからなる。
前記副切込溝２６の溝底面に開口する噴射孔３０の楕円状部３０ａは、図５に示すように、幅方向Ｘを短軸方向、長さ方向Ｙを長軸方向とする楕円形状である。この短軸方向の寸法は両側壁２１の傾斜角度を大とすることで広げることができると共に、長軸方向の寸法は溝底面２６ａの傾斜角度を大とすることで広げることができる。 Outer side walls 26b of both side walls of each sub-cut groove 26 become inclined side walls 21 that continue to the top surface 16, and the inner side wall 26c on the main cut groove side is also tilted outward. The pair of injection holes 30 formed so as to communicate with the cut groove 26 and the main hole 14 has an elongated horizontal elliptical portion 30a that opens on the groove bottom surface 26a, and both sides of the elliptical portion 30a. The wall 26b and the semicircular portions 30b and 30c in the vertical direction formed on the inner side 26c, respectively.
As shown in FIG. 5, the elliptical portion 30a of the injection hole 30 opened in the groove bottom surface of the sub-cut groove 26 has an elliptical shape in which the width direction X is the minor axis direction and the length direction Y is the major axis direction. is there. The dimension in the short axis direction can be widened by increasing the inclination angle of both side walls 21, and the dimension in the long axis direction can be widened by increasing the inclination angle of the groove bottom surface 26a.

前記形状としたノズルでは、ノズル本体１０の流入路１１に流入する気液混合流体は一対の主孔１４とその間の副孔１５に流入し、副孔１５に流入した流体は両側の主孔１４へと更に流入して、一対の噴射孔３０より噴射される。
噴射時において、一対の噴射孔３０からの噴射される噴霧は、噴射孔３０の楕円状部３０ａが長さ方向Ｙが長軸方向であるため、長さ方向Ｙに広がった形状となると共に、幅方向に近接する２つの噴射孔３０（３０Ａ、３０Ｂ）から噴射されることで幅方向Ｘにも所要の広幅となり、幅方向Ｘの噴霧角度も比較的広い厚幅噴霧となる。 In the nozzle having the above-described shape, the gas-liquid mixed fluid flowing into the inflow passage 11 of the nozzle body 10 flows into the pair of main holes 14 and the sub hole 15 therebetween, and the fluid flowing into the sub holes 15 is the main holes 14 on both sides. The gas further flows into and is injected from the pair of injection holes 30.
At the time of injection, the spray injected from the pair of injection holes 30 has a shape in which the elliptical portion 30a of the injection hole 30 extends in the length direction Y because the length direction Y is the major axis direction. By spraying from the two injection holes 30 (30A, 30B) close to the width direction, the width direction X also becomes a required wide width, and the spray angle in the width direction X becomes a relatively wide thick spray.

さらに、幅方向Ｘでは、切込溝２０の両側壁２１を頂面１６に向けて近接させているため、幅方向Ｘで互いに離反する外方への噴霧の拡散を抑制でき、幅方向の両端への噴霧量を減少させず、図６（Ａ）〜（Ｄ）に示すように、噴霧範囲の幅方向Ｘを厚幅としながら、その全域にわたり噴霧量を均等化することができる。   Furthermore, in the width direction X, since both side walls 21 of the cut groove 20 are brought close to the top surface 16, it is possible to suppress diffusion of sprays to the outside that are separated from each other in the width direction X. As shown in FIGS. 6 (A) to 6 (D), the spray amount can be equalized over the entire region while the width direction X of the spray range is made thick.

前記本発明のノズルは、連続鋳造装置の二次冷却帯のロール（図示せず）の間に長さ方向Ｙおよび幅方向Ｘとも間隔をあけて配置され、噴射孔３０の長さ方向Ｙと対応する噴霧範囲の両側をラップさせると共に幅方向Ｘの噴射範囲の両側をラップさせている。前記ノズル１０は噴霧の幅方向Ｘの噴霧角度が従来のノズルよりも拡げられているため、言わば、厚幅ノズルとなる。該ノズルは、長さ方向と直交する幅方向を厚幅に噴射ができる構成としているため、気液混合流体の空気量の割合を低減しても、幅方向の噴射角度が低減せず、空気量の割合の低減化で省エネルギー化を図ることができる共に、水量の割合の増加で冷却速度を早めることができる。   The nozzle of the present invention is disposed between the rolls (not shown) of the secondary cooling zone of the continuous casting apparatus with a gap in both the length direction Y and the width direction X. Both sides of the corresponding spray range are wrapped and both sides of the injection range in the width direction X are wrapped. The nozzle 10 is a thick-width nozzle because the spray angle in the spray width direction X is wider than that of the conventional nozzle. Since the nozzle is configured to be able to inject the width direction perpendicular to the length direction into a thick width, even if the ratio of the air amount of the gas-liquid mixed fluid is reduced, the injection angle in the width direction does not decrease, and the air Energy saving can be achieved by reducing the ratio of the amount, and the cooling rate can be increased by increasing the ratio of the amount of water.

図７（Ａ）（Ｂ）は第２実施形態を示し、第１実施形態との相違点は、切込溝２０’の溝底面を平坦として第１実施形態のように中央部に段状突出部を設けていない点である。
このように、切込溝２０’の溝底面２０ａ’を平坦面としても、主孔１４を先端円弧形状としているため溝底面２０ａ’と連通させて、溝底面２０’の長さ方向の中央の幅方向の両側に左右一対の噴射孔３０’（３０Ａ’、３０Ｂ’）を設けることができる。
他の構成は第１実施形態と同様であるため、同一符号を付して説明を省略する。 7 (A) and 7 (B) show the second embodiment. The difference from the first embodiment is that the groove bottom surface of the cut groove 20 ′ is flat and protrudes stepwise at the center as in the first embodiment. The point is that no part is provided.
As described above, even if the groove bottom surface 20a ′ of the cut groove 20 ′ is a flat surface, the main hole 14 has a circular arc shape at the tip, so that the groove bottom surface 20a ′ communicates with the center of the groove bottom surface 20 ′ in the longitudinal direction. A pair of left and right injection holes 30 '(30A', 30B ') can be provided on both sides in the width direction.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

図８（Ａ）（Ｂ）は主孔１４（１４Ａ，１４Ｂ）の変形例を示す。
図８（Ａ）では主孔１４Ａ、１４Ｂをノズル本体の中心軸線Ｌと平行とせず、先端を互いに離反する方向に傾斜させている。該構成とすると、幅方向の噴霧範囲をより広くする作用効果を有する。
図８（Ｂ）では主孔１４Ａ、１４Ｂをノズル本体の中心軸線Ｌと平行とせず、（Ａ）とは逆に先端を互いに近接する方向に傾斜させている。該構成とすると、幅方向の噴霧範囲を抑制し噴射量を集中させる作用効果を有する。 8A and 8B show a modification of the main hole 14 (14A, 14B).
In FIG. 8A, the main holes 14A and 14B are not parallel to the central axis L of the nozzle body, but the tips are inclined in directions away from each other. With this configuration, there is an effect of widening the spray range in the width direction.
In FIG. 8B, the main holes 14A and 14B are not parallel to the central axis L of the nozzle body, and the tips are inclined in a direction close to each other as opposed to (A). With this configuration, there is an effect of suppressing the spray range in the width direction and concentrating the injection amount.

なお、本発明は前記実施形態に限定されず、第１実施形態では主孔の間に副孔を設けているが、必ずしも副孔を設ける必要はなく、かつ、副孔の先端も円弧形状と限定されない。
さらに、前記ノズルは空気と水とを混合した二流体ノズルとして好適に用いられるが、空気量の割合を減少しても厚み方向の噴射角度が低減しないことより、空気量の割合をゼロとして水のみによる一流体ノズルとしても使用できる。
この場合には冷却効果をより高めることが出来ると共に、高圧空気を不要とできるため、ランニングコストを大幅に低減することができる。
また、冷却用に限定されず、各種用途に使用できることは言うまでもない。 The present invention is not limited to the above-described embodiment. In the first embodiment, the sub-holes are provided between the main holes. However, the sub-holes are not necessarily provided, and the tip of the sub-hole has an arc shape. It is not limited.
Furthermore, the nozzle is preferably used as a two-fluid nozzle in which air and water are mixed. However, even if the ratio of the air amount is reduced, the injection angle in the thickness direction does not decrease. It can also be used as a single fluid nozzle.
In this case, the cooling effect can be further enhanced and high-pressure air can be eliminated, so that the running cost can be significantly reduced.
Moreover, it cannot be overemphasized that it can use for various uses, without being limited to the object for cooling.

本発明の第１実施形態のノズルの斜視図である。It is a perspective view of the nozzle of 1st Embodiment of this invention. （Ａ）が第１実施形態のノズルの噴射側の正面図である。(A) is a front view of the ejection side of the nozzle of the first embodiment. 前記ノズルの噴射側の側面図である。It is a side view of the ejection side of the nozzle. 前記ノズルの断面図である。It is sectional drawing of the said nozzle. 要部拡大断面図である。It is a principal part expanded sectional view. （Ａ）〜（Ｄ）は噴霧パターンと噴霧量の関係を示す説明図である。(A)-(D) are explanatory drawings which show the relationship between a spray pattern and a spray amount. （Ａ）（Ｂ）は本発明の第２実施形態を示す図面である。(A) (B) is drawing which shows 2nd Embodiment of this invention. （Ａ）（Ｂ）は主孔の変形例を示す概略図である。(A) (B) is the schematic which shows the modification of a main hole. （Ａ）乃至（Ｃ）は従来例のノズルを示す図面である。(A) thru | or (C) are drawings which show the nozzle of a prior art example. （Ａ）（Ｂ）は図９のノズルの噴霧パターンを示す図面である。(A) (B) is drawing which shows the spray pattern of the nozzle of FIG. （Ａ）（Ｂ）は他の従来例のノズルを示す図面である。(A) (B) is drawing which shows the nozzle of another prior art example. （Ａ）（Ｂ）は図１１のノズルの噴霧パターンを示す図面である。(A) (B) is drawing which shows the spray pattern of the nozzle of FIG.

符号の説明Explanation of symbols

１０ ノズル本体
１１ 流入路
１４（１４Ａ、１４Ｂ） 主孔
１５ 副孔
１６ 頂面
２０ 切込溝
２１ 両側壁
２５ 主切込溝
２６ 副切込溝
３０ 噴射孔
Ｘ 幅方向
Ｙ 長さ方向 DESCRIPTION OF SYMBOLS 10 Nozzle main body 11 Inflow path 14 (14A, 14B) Main hole 15 Sub hole 16 Top surface 20 Cut groove 21 Both side wall 25 Main cut groove 26 Sub cut groove 30 Injection hole X Width direction Y Length direction

Claims (7)

ノズル本体の中心軸線に沿って、一端の流入口より他端の噴射側に向けて流入路を設け、該流入路の噴射側先端にノズル本体の中心から幅方向の両側に、先端を円弧状とした一対の主孔を設ける一方、
前記ノズル本体の噴射側の平坦状の頂面に、前記幅方向と直交方向で且つノズル本体の中心を通る直径方向の広幅の切込溝を設け、該切込溝は長さ方向の両端より中心に向けて深さ方向に傾斜させ、前記一対の主孔と連通させて、幅方向に近接する一対の噴射孔を設け、かつ、前記切込溝の幅方向の両側壁を前記頂面に向けて近接する方向に傾斜させ、該切込溝の幅方向断面を台形状としていることを特徴とするノズル。 An inflow path is provided from the inlet of one end to the injection side of the other end along the central axis of the nozzle body, and the tip is arcuate from the center of the nozzle body to both sides in the width direction from the injection side of the inflow path While providing a pair of main holes,
The flat top surface on the injection side of the nozzle body is provided with a diametrically wide cut groove that is perpendicular to the width direction and passes through the center of the nozzle body, and the cut groove is formed from both ends in the length direction. Inclined in the depth direction toward the center, communicated with the pair of main holes, provided with a pair of injection holes adjacent in the width direction, and both side walls in the width direction of the cut groove on the top surface The nozzle characterized by making it incline toward the direction which adjoins, and making the cross section of the width direction of this notch groove into trapezoid. 前記一対の噴射孔は、長さ方向が長軸で、幅方向が短軸となる楕円孔とし、
前記切込溝の底面の長さ方向の中心に向けた傾斜角度で噴霧範囲の長さ寸法を調整し、切込溝の幅方向の両側壁の傾斜角度で噴霧範囲の幅方向寸法を調整している請求項１に記載のノズル。 The pair of injection holes are elliptical holes having a major axis in the length direction and a minor axis in the width direction,
The length dimension of the spray range is adjusted by the inclination angle toward the center of the length direction of the bottom surface of the cut groove, and the width direction dimension of the spray range is adjusted by the inclination angle of both side walls in the width direction of the cut groove. The nozzle according to claim 1. 前記切込溝は長さ方向の両端から中心に向けて次第に幅狭となるように傾斜させている請求項１または請求項２に記載のノズル。   The nozzle according to claim 1, wherein the cut groove is inclined so as to become gradually narrower from both ends in the length direction toward the center. 前記切込溝は、幅方向の中心の主切込溝と、該主切込溝の幅方向の両側に更に切り込んだ一対の副切込溝とからなる段状とし、
前記主切込溝の溝底面を平坦面とすると共に、幅方向の両側を長さ方向の両端に向けて幅狭となるように傾斜させている一方、
前記副切込溝の溝底面を長さ方向の両端より中心に向けて深さ方向に傾斜させて、前記一対の主孔と連通する前記一対の噴射孔を設け、かつ、各副切込溝の両側壁のうち外側壁を前記平坦状頂面まで連続する傾斜壁とすると共に、主切込溝側の内側壁も外側に傾斜させている請求項１乃至請求項３のいずれか１項に記載のノズル。 The cut groove has a step shape including a main cut groove at the center in the width direction and a pair of sub cut grooves further cut on both sides in the width direction of the main cut groove,
While the bottom surface of the main cut groove is a flat surface, both sides in the width direction are inclined to be narrow toward both ends in the length direction,
Inclining the groove bottom surface of the sub cut groove in the depth direction from both ends in the length direction to provide the pair of injection holes communicating with the pair of main holes, and each sub cut groove The outer wall of the two side walls is an inclined wall that continues to the flat top surface, and the inner wall on the main cut groove side is also inclined outward. The nozzle described. 前記各噴射孔は、前記副切込溝の溝底面に開口する楕円状の噴射孔と、該噴射孔と連通して、副切込溝の対向する両側壁に開口する直交方向の半円形状の噴射孔とからなる請求項４に記載のノズル。   Each of the injection holes has an elliptical injection hole that opens in the groove bottom surface of the sub cut groove, and a semicircular shape in an orthogonal direction that communicates with the spray hole and opens in opposite side walls of the sub cut groove. The nozzle according to claim 4, comprising a plurality of injection holes. 前記一対の主孔の軸線は、ノズル本体の軸線と平行、ノズル本体の軸線に対してノズル中心に向けて傾斜、あるいはノズル本体の軸線に対してノズル中心より離れる方向に傾斜させている請求項１乃至請求項５のいずれか１項に記載のノズル。   The axis of the pair of main holes is parallel to the axis of the nozzle body, inclined toward the nozzle center with respect to the axis of the nozzle body, or inclined in a direction away from the nozzle center with respect to the axis of the nozzle body. The nozzle according to any one of claims 1 to 5. 前記一対の主孔の間のノズル本体の中心に前記流入路の中心に連通する副孔を設け、該副孔を両側の前記主孔と連通させ、該副孔の先端を円弧形状としている請求項１乃至請求項６のいずれか１項に記載のノズル。   A sub-hole communicating with the center of the inflow passage is provided at the center of the nozzle body between the pair of main holes, the sub-hole communicates with the main holes on both sides, and the tip of the sub-hole has an arc shape. The nozzle according to any one of claims 1 to 6.
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