JP5364428B2 - Water seal structure of continuous casting mold - Google Patents

Water seal structure of continuous casting mold Download PDF

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JP5364428B2
JP5364428B2 JP2009101172A JP2009101172A JP5364428B2 JP 5364428 B2 JP5364428 B2 JP 5364428B2 JP 2009101172 A JP2009101172 A JP 2009101172A JP 2009101172 A JP2009101172 A JP 2009101172A JP 5364428 B2 JP5364428 B2 JP 5364428B2
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bolt
peripheral surface
diameter
seal washer
inner peripheral
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JP2010247205A (en
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晴道 野口
孝 栃原
修至 脇田
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Nippon Steel Engineering Co Ltd
Nippon Steel Plant Designing Corp
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NS Plant Designing Corp
Nippon Steel Engineering Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a water seal structure of a continuous casting mold capable of securing thermal elongation amount of a copper plate to a backplate by a space smaller than that of an existing water seal mechanism. <P>SOLUTION: The water seal structure of the continuous casting mold has the copper plate 12 and the backplate 15 abutting on the rear surface of the copper plate 12 and the backplate 15 which is fixed by screwing a bolt 13 mounted in a bolt through-hole 14 into the copper plate 12. A water seal structure 10 pressed to a small diameter recess 21 formed at the annular bottom of the large diameter recess 20 of the backplate 15 through which the bolt 13 is passed is arranged between a bolt head 19 and the bolt through-hole 14. An inner seal washer 18 mounted in the small diameter recess 21 and an outer seal washer 17 abutting on the inner seal washer 18 and movably arranged in the large diameter recess 20 are used in the water seal structure 10. The gap between the inner circumferential surface of the inner seal washer 18 and the outer circumferential surface of the non-screw part of the bolt 13 is made to be equal to or smaller than the gap between the outer circumferential surface of the non-screw part of the bolt 13 and the inner circumferential surface of the bolt through-hole 14. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、バックプレートに対する銅板の熱伸び量を確保し、従来よりコンパクトな連続鋳造鋳型の水シール構造に関する。 The present invention relates to a water seal structure for a continuous casting mold that secures the amount of thermal elongation of a copper plate relative to a back plate and is more compact than conventional ones.

連続鋳造鋳型、例えば電磁撹拌機付きスラブモールドでは、表面が溶鋼に接触し裏面側が水冷される銅板と、銅板がボルトを介して取付けられるバックプレートとの間の水シールには、例えばＯリングを備えたシール座金が使用されている（例えば、特許文献１、２参照）。ここで、比較的鋳造速度の遅い電磁撹拌機付きスラブモールドでは、鋳造時における銅板の温度上昇が小さく銅板の熱伸び量が少ない。このため、バックプレートに形成したボルト貫通孔にボルトを貫通させてボルトの先部のみに形成されている雄ねじを銅板に螺合させた際に、銅板の熱伸びと共に熱伸び方向に移動するボルトとボルト貫通孔の間に形成する隙間も小さく設定されている。 In a continuous casting mold, for example, a slab mold with an electromagnetic stirrer, for example, an O-ring is used for a water seal between a copper plate whose surface is in contact with molten steel and whose back side is water-cooled and a back plate to which the copper plate is attached via bolts. The provided seal washer is used (for example, refer to Patent Documents 1 and 2). Here, in the slab mold with an electromagnetic stirrer having a relatively slow casting speed, the temperature rise of the copper plate during casting is small and the amount of thermal elongation of the copper plate is small. For this reason, when the bolt is passed through the bolt through hole formed in the back plate and the male screw formed only on the tip of the bolt is screwed to the copper plate, the bolt moves in the direction of thermal expansion along with the thermal expansion of the copper plate. And the gap formed between the bolt through holes is also set small.

特開２００４−１１４１３３号公報JP 2004-114133 A 特開２００６−２８４５０３号公報JP 2006-284503 A

電磁撹拌機付きスラブモールドにおいて、電磁撹拌力の確保のため銅板厚みを薄くする必要があり、この場合は銅板の熱変形を抑えるため、銅板をバックプレートに取付けるボルトのピッチを小さくすることが行なわれている。また、銅板を冷却する冷却水の排水路を確保するため、ボルト貫通孔間に鋳造方向に沿ってスリット溝を設けることが行なわれている。このため、特許文献１、２に示すシール座金を設置するスペースの確保が困難になり、図３に示すように、電磁撹拌機付きスラブモールド１００の銅板１２とバックプレート１５との間の水シール機構１０１に、２個のＯリング１０２、１０３を備えたシール部材１０４が使用されるようになっている。 In a slab mold with an electromagnetic stirrer, it is necessary to reduce the thickness of the copper plate in order to ensure the electromagnetic stirring force. In this case, in order to suppress thermal deformation of the copper plate, the pitch of the bolts that attach the copper plate to the back plate is reduced. It is. Moreover, in order to ensure the drainage path of the cooling water which cools a copper plate, providing the slit groove | channel along the casting direction between bolt through-holes is performed. For this reason, it becomes difficult to secure a space for installing the seal washer shown in Patent Documents 1 and 2, and as shown in FIG. 3, a water seal between the copper plate 12 and the back plate 15 of the slab mold 100 with an electromagnetic stirrer is provided. A seal member 104 including two O-rings 102 and 103 is used for the mechanism 101.

ここで、水シール機構１０１は、バックプレート１５に形成された大径凹部１０５の環状底部の中央に設けられたボルト貫通孔１４に挿通されるボルト１３の非ねじ部に順次外装される複数の皿バネ１６及びシール部材１０４を有し、シール部材１０４のＯリング１０２はボルト１３の非ねじ部に密着している。そして、ボルト１３の雄ねじ部が銅板１２に螺合されてバックプレート１５が銅板１２に固着された際に、複数の皿バネ１６はボルト１３のボルト頭部１９に当接してシール部材１０４をＯリング１０３を介して大径凹部１０５の環状底部に押圧し、皿バネ１６及びシール部材１０４は、大径凹部１０５にボルト頭部１９と共に収納されている。これにより、スリット溝１１内を通過する冷却用の水がスリット溝１１からボルト貫通孔１４内に進入しても、ボルト１３の非ねじ部とバックプレート１５との間に存在するシール部材１０４により水シールが達成される。 Here, the water seal mechanism 101 has a plurality of outer sheaths that are sequentially sheathed on the non-threaded portions of the bolts 13 inserted into the bolt through holes 14 provided in the center of the annular bottom portion of the large-diameter recess 105 formed in the back plate 15. The disc spring 16 and the seal member 104 are provided, and the O-ring 102 of the seal member 104 is in close contact with the non-threaded portion of the bolt 13. When the male screw portion of the bolt 13 is screwed to the copper plate 12 and the back plate 15 is fixed to the copper plate 12, the plurality of disc springs 16 abut against the bolt head 19 of the bolt 13 to make the seal member 104 O The disc spring 16 and the seal member 104 are housed in the large-diameter recess 105 together with the bolt head 19 by pressing against the annular bottom of the large-diameter recess 105 via the ring 103. As a result, even if cooling water passing through the slit groove 11 enters the bolt through hole 14 from the slit groove 11, the sealing member 104 existing between the non-threaded portion of the bolt 13 and the back plate 15 A water seal is achieved.

一方、近年、生産性向上のため鋳造速度の増加が図られ、銅板の温度上昇が大きくなって銅板の熱伸び量も増大するようになっている。このため、既存の電磁撹拌機付きスラブモールドにおいて、銅板の熱伸び量を確保するため、ボルト貫通孔１４にボルト１３を貫通させたときに生じるボルト１３の周りの隙間を拡大する必要がある。これにより、大径凹部１０５及びボルト貫通孔１４の内周面の径をそれぞれ拡大する必要が生じる。しかし、銅板１２の熱変形を抑えるため銅板１２をバックプレート１５に取付けるボルト１３のピッチを小さくしているために、大径凹部１０５の内周面の径をコンパクトにする必要が生じる。 On the other hand, in recent years, the casting speed has been increased to improve productivity, and the temperature rise of the copper plate has increased, and the amount of thermal elongation of the copper plate has also increased. For this reason, in the existing slab mold with an electromagnetic stirrer, it is necessary to enlarge a gap around the bolt 13 that is generated when the bolt 13 is passed through the bolt through hole 14 in order to ensure the thermal elongation of the copper plate. Thereby, it is necessary to enlarge the diameters of the inner peripheral surfaces of the large-diameter concave portion 105 and the bolt through-hole 14. However, since the pitch of the bolts 13 for attaching the copper plate 12 to the back plate 15 is reduced in order to suppress thermal deformation of the copper plate 12, it is necessary to make the diameter of the inner peripheral surface of the large-diameter recess 105 compact.

本発明はかかる事情に鑑みてなされたもので、銅板と銅板を固定しているバックプレートとの間の水シール構造として、１枚のシール部材に２個のＯリングを備えた従来のシール構造よりも大径凹部の拡大を抑えて、バックプレートに対する銅板の熱伸び量の増加を可能にする連続鋳造鋳型の水シール構造を提供することを目的とする。 The present invention has been made in view of such circumstances, and as a water seal structure between a copper plate and a back plate fixing the copper plate, a conventional seal structure having two O-rings in one seal member. An object of the present invention is to provide a water-sealing structure for a continuous casting mold that suppresses the enlargement of the large-diameter concave portion and increases the amount of thermal elongation of the copper plate relative to the back plate.

前記目的に沿う本発明に係る連続鋳造鋳型の水シール構造は、裏面側に冷却水の流路となるスリット溝が多数形成された銅板と、該銅板の裏面に当接し、ボルト貫通孔を介して装着されたボルトの先部のみに形成されている雄ねじを前記銅板に螺合させて該銅板に固着されるバックプレートとを有し、前記ボルトの頭部と前記ボルト貫通孔の間に弾性部材を介して、該ボルトが挿通する前記バックプレートの大径凹部の環状底部に形成された小径凹部に押圧される水シール機構が設けられた連続鋳造鋳型の水シール構造において、
前記水シール機構に、前記小径凹部に装着される内側シール座金と、該内側シール座金に当接し前記大径凹部に移動可能に配置された外側シール座金とを用い、前記内側シール座金に前記小径凹部の底面に当接する第１のＯリングを装着する第１のＯリング溝を設け、前記外側シール座金に、前記ボルトの非ねじ部に当接する第２のＯリングを装着する第２のＯリング溝を設けると共に、前記内側シール座金に当接する第３のＯリングを備えた第３のＯリング溝を設けた。 The water-sealing structure of the continuous casting mold according to the present invention that meets the above-described object is a copper plate in which a large number of slit grooves serving as cooling water flow paths are formed on the back surface side, abutting on the back surface of the copper plate, and through bolt through holes. And a back plate fixed to the copper plate by screwing a male screw formed only on the tip of the bolt attached to the copper plate, and elastic between the bolt head and the bolt through hole. In the water-sealing structure of a continuous casting mold provided with a water-seal mechanism that is pressed by a small-diameter recess formed in an annular bottom portion of the large-diameter recess of the back plate through which the bolt is inserted,
The water seal mechanism uses an inner seal washer mounted on the small-diameter recess and an outer seal washer that is in contact with the inner seal washer and is movably disposed in the large-diameter recess. A first O-ring groove for mounting a first O-ring that contacts the bottom surface of the recess is provided, and a second O-ring for mounting a second O-ring that contacts the non-threaded portion of the bolt is provided on the outer seal washer. A ring groove was provided, and a third O-ring groove provided with a third O-ring in contact with the inner seal washer was provided.

本発明に係る連続鋳造鋳型の水シール構造において、前記弾性部材は複数の皿ばねを用いることができる。
また、前記内側シール座金の内周面と前記ボルトの非ねじ部の外周面との隙間は、該ボルトの非ねじ部の外周面と該ボルト貫通孔の内周面との隙間以下とすることが好ましい。 In the water seal structure of the continuous casting mold according to the present invention, the elastic member can use a plurality of disc springs.
The clearance between the inner peripheral surface of the inner seal washer and the outer peripheral surface of the non-threaded portion of the bolt should be less than or equal to the clearance between the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through hole. Is preferred.

本発明に係る連続鋳造鋳型の水シール構造において、前記小径凹部の内周面の径は、前記大径凹部の内周面の径以下であり、前記外側シール座金の外周面と前記大径凹部の内周面との隙間は、前記ボルトの非ねじ部の外周面と前記ボルト貫通孔の内周面との隙間以上に設定され、前記内側シール座金の外周面と前記小径凹部の内周面との隙間及び該内側シール座金の内周面と該ボルトの非ねじ部の外周面との隙間の合計は、該ボルトの非ねじ部の外周面と該ボルト貫通孔の内周面との隙間以上に設定され、該内側シール座金の内周面と該ボルトの非ねじ部の外周面との隙間は、前記内側シール座金の第１のＯリング溝の内径と該ボルト貫通孔の内周面の径との差の１／２以下に設定され、該内側シール座金の高さは、該小径凹部の深さより大きいことが好ましい。 In the water seal structure of the continuous casting mold according to the present invention, the diameter of the inner peripheral surface of the small-diameter recess is equal to or less than the diameter of the inner peripheral surface of the large-diameter recess, and the outer peripheral surface of the outer seal washer and the large-diameter recess The clearance between the inner peripheral surface of the bolt and the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through-hole is set to be greater than the outer peripheral surface of the inner seal washer and the inner peripheral surface of the small-diameter recess. And the total clearance between the inner peripheral surface of the inner seal washer and the outer peripheral surface of the non-threaded portion of the bolt is the clearance between the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through hole. The clearance between the inner peripheral surface of the inner seal washer and the outer peripheral surface of the non-threaded portion of the bolt is set as described above. The inner diameter of the first O-ring groove of the inner seal washer and the inner peripheral surface of the bolt through hole The height of the inner seal washer is larger than the depth of the small-diameter recess. Ikoto is preferable.

本発明に係る連続鋳造鋳型の水シール構造においては、外側シール座金は内側シール座金に当接し、大径凹部に移動可能に配置されているので、銅板の熱伸びに応じてボルトがボルト貫通孔内で移動するのに伴って外側シール座金は内側シール座金に対して当接状態で滑ることができ、銅板の熱伸びが拘束されず、かつ銅板とバックプレート間の水シールを行うことができる。 In the water seal structure of the continuous casting mold according to the present invention, the outer seal washer contacts the inner seal washer and is movably disposed in the large-diameter recess. The outer seal washer can slide in contact with the inner seal washer as it moves in, the thermal expansion of the copper plate is not restrained, and the water seal between the copper plate and the back plate can be performed .

本発明に係る連続鋳造鋳型の水シール構造において、弾性部材として複数の皿ばねが用いられる場合、外側シール座金と内側シール座金の密着力、内側シール座金のバックプレートに対する付勢力を皿ばねの枚数、皿ばねの重ね方により調整することができ、銅板とバックプレート間の水シールを確実に行うことができる。 In the water seal structure of the continuous casting mold according to the present invention, when a plurality of disc springs are used as the elastic member, the adhesion force between the outer seal washer and the inner seal washer, and the biasing force of the inner seal washer against the back plate are the number of disc springs. It can be adjusted by the way of stacking the disc springs, and the water seal between the copper plate and the back plate can be reliably performed.

本発明に係る連続鋳造鋳型の水シール構造において、内側シール座金の内周面とボルトの非ねじ部の外周面との隙間を、ボルトの非ねじ部の外周面とボルト貫通孔の内周面との隙間以下とする場合、従来方法のシール部材単独でボルトがボルト貫通孔内で移動できる隙間を確保するために必要であった大径凹部の内周面の径より小さな径で、ボルトがボルト貫通孔内で移動できる隙間を確保できる。 In the water-sealing structure of the continuous casting mold according to the present invention, the gap between the inner peripheral surface of the inner seal washer and the outer peripheral surface of the non-threaded portion of the bolt is divided into the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through-hole. The diameter of the bolt is smaller than the diameter of the inner peripheral surface of the large-diameter recess, which is necessary to secure a gap in which the bolt can move in the bolt through hole by the conventional sealing member alone. A gap that can move within the bolt through hole can be secured.

本発明に係る連続鋳造鋳型の水シール構造において、小径凹部の内周面の径は、大径凹部の内周面の径以下であり、外側シール座金の外周面と大径凹部の内周面との隙間は、ボルトの非ねじ部の外周面とボルト貫通孔の内周面との隙間以上に設定され、内側シール座金の外周面と小径凹部の内周面との隙間及び内側シール座金の内周面とボルトの非ねじ部の外周面との隙間の合計は、ボルトの非ねじ部の外周面とボルト貫通孔の内周面との隙間以上に設定され、内側シール座金の内周面とボルトの非ねじ部の外周面との隙間は、内側シール座金の第１のＯリング溝の内径とボルト貫通孔の内周面の径との差の１／２以下に設定される場合、Ｏリングがシール面から外れることなく、バックプレートに対する銅板の熱伸び量を確保することができる。 In the water seal structure of the continuous casting mold according to the present invention, the diameter of the inner peripheral surface of the small-diameter recess is equal to or less than the diameter of the inner peripheral surface of the large-diameter recess, and the outer peripheral surface of the outer seal washer and the inner peripheral surface of the large-diameter recess The gap between the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through hole is set to be greater than the clearance between the outer peripheral surface of the inner seal washer and the inner peripheral surface of the small-diameter recess, and the inner seal washer. The total clearance between the inner peripheral surface and the outer peripheral surface of the non-threaded portion of the bolt is set to be greater than or equal to the clearance between the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through hole, and the inner peripheral surface of the inner seal washer When the gap between the outer peripheral surface of the bolt and the non-threaded portion of the bolt is set to ½ or less of the difference between the inner diameter of the first O-ring groove of the inner seal washer and the inner peripheral surface of the bolt through hole, It is possible to secure the amount of thermal expansion of the copper plate relative to the back plate without removing the O-ring from the sealing surface. That.

本発明に係る連続鋳造鋳型の水シール構造において、内側シール座金の高さが小径凹部の深さより大きい場合、小径凹部内に収納された内側シール座金を、弾性部材を介して銅板側に向けて付勢された外側シール座金で、小径凹部の底面に押圧することができ、第１のＯリングにより水シールが確実に行われる。更に、外側シール座金が小径凹部の内周面に接触するのを防止して、銅板の熱伸びに応じてボルトをボルト貫通孔内で移動させることができる。 In the water seal structure of the continuous casting mold according to the present invention, when the height of the inner seal washer is larger than the depth of the small-diameter recess, the inner seal washer housed in the small-diameter recess is directed toward the copper plate via the elastic member. The biased outer seal washer can press against the bottom surface of the small-diameter recess, and the first O-ring ensures water sealing. Furthermore, it is possible to prevent the outer seal washer from coming into contact with the inner peripheral surface of the small-diameter recess, and to move the bolt within the bolt through hole according to the thermal elongation of the copper plate.

本発明の一実施の形態に係る水シール構造を示した説明図である。It is explanatory drawing which showed the water seal structure which concerns on one embodiment of this invention. 同水シール構造において、銅板の熱伸びに応じてボルトがボルト貫通孔内で移動した状態を示す説明図である。In the water seal structure, it is explanatory drawing which shows the state which the volt | bolt moved within the volt | bolt through-hole according to the thermal elongation of the copper plate. 従来例に係る水シール構造を示した説明図である。It is explanatory drawing which showed the water seal structure which concerns on a prior art example.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
図１に示すように、本発明の一実施の形態に係る連続鋳造鋳型の水シール構造１０は、裏面側に冷却水の流路となるスリット溝１１が多数形成された銅板１２と、銅板１２の裏面に当接し、ボルト貫通孔１４を介して装着されたボルト１３の先部のみに形成されている雄ねじを銅板１２に螺合させて銅板１２に固着されるバックプレート１５とを有し、ボルト頭部１９とボルト貫通孔１４の間に弾性部材の一例である複数の皿ばね１６を介して、ボルト１３が挿通するバックプレート１５の大径凹部２０の環状底部に形成された小径凹部２１に押圧される水シール機構１０が設けられた連続鋳造鋳型に適用されている。 Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1, a continuous casting mold water seal structure 10 according to an embodiment of the present invention includes a copper plate 12 in which a number of slit grooves 11 serving as cooling water channels are formed on the back surface side, and a copper plate 12. And a back plate 15 fixed to the copper plate 12 by screwing a male screw formed only on the tip of the bolt 13 attached through the bolt through hole 14 to the copper plate 12; A small-diameter recess 21 formed in the annular bottom of the large-diameter recess 20 of the back plate 15 through which the bolt 13 is inserted via a plurality of disc springs 16 as an example of an elastic member between the bolt head 19 and the bolt through hole 14. It is applied to a continuous casting mold provided with a water seal mechanism 10 that is pressed against the surface.

そして、水シール機構１０に、小径凹部２１に装着される内側シール座金１８と、内側シール座金１８に当接し大径凹部２０に移動可能に配置された外側シール座金１７とを用い、内側シール座金１８に小径凹部２１の底面に当接する第１のＯリング２２を装着する第１のＯリング溝２２ａを設け、外側シール座金１７に、ボルト１３の非ねじ部に当接する第２のＯリング２３を装着する第２のＯリング溝２３ａを設けると共に、内側シール座金１８に当接する第３のＯリング２４を備えた第３のＯリング溝２４ａを設けている。 Then, the inner seal washer 18 is mounted on the water seal mechanism 10 using the inner seal washer 18 attached to the small-diameter recess 21 and the outer seal washer 17 that is in contact with the inner seal washer 18 and is movably disposed in the large-diameter recess 20. 18 is provided with a first O-ring groove 22 a for mounting a first O-ring 22 that contacts the bottom surface of the small-diameter recess 21, and a second O-ring 23 that contacts the non-threaded portion of the bolt 13 in the outer seal washer 17. And a third O-ring groove 24 a provided with a third O-ring 24 that contacts the inner seal washer 18.

これによって、銅板１２が熱伸びすると、先部が銅板１２に螺合されているボルト１３は、銅板１２の熱伸びと共にボルト貫通孔１４内を移動することができ、図２に示すように、ボルト１３がボルト貫通孔１４の内面に接触するまで、銅板１２の熱伸びは拘束されず銅板１２が自由に熱伸びすることができる。 As a result, when the copper plate 12 is thermally stretched, the bolt 13 whose tip is screwed to the copper plate 12 can move in the bolt through hole 14 together with the thermal elongation of the copper plate 12, as shown in FIG. Until the bolt 13 comes into contact with the inner surface of the bolt through hole 14, the thermal elongation of the copper plate 12 is not constrained, and the copper plate 12 can freely thermally expand.

ここで、内側シール座金１８の内面には小径凹部２１の底面に当接する第１のＯリング２２が設けられ、外側シール座金１７には、内側シール座金１８に当接する第３のＯリング２４及びボルト１３の非ねじ部に当接する第２のＯリング２３が設けられている。これによって、スリット溝１１内の水がスリット溝１１からボルト貫通孔１４内に進入しても、ボルト１３の非ねじ部とバックプレート１５との間の水シールが行われる。そして、外側シール座金１７は第３のＯリング２４を介して内側シール座金１８に当接しているので、銅板１２の熱伸びに応じてボルト１３がボルト貫通孔１４内で移動するのに伴って外側シール座金１７は内側シール座金１８に対して当接状態で滑ることができ、銅板１２の熱伸びが拘束されず、かつ銅板１２とバックプレート１５間の水シールを行うことができる。 Here, the inner surface of the inner seal washer 18 is provided with a first O-ring 22 that contacts the bottom surface of the small-diameter recess 21, and the outer seal washer 17 has a third O-ring 24 that contacts the inner seal washer 18 and A second O-ring 23 that contacts the non-threaded portion of the bolt 13 is provided. Thereby, even if the water in the slit groove 11 enters the bolt through hole 14 from the slit groove 11, the water seal between the non-threaded portion of the bolt 13 and the back plate 15 is performed. Since the outer seal washer 17 is in contact with the inner seal washer 18 via the third O-ring 24, the bolt 13 moves in the bolt through hole 14 according to the thermal expansion of the copper plate 12. The outer seal washer 17 can be slid in contact with the inner seal washer 18, the thermal expansion of the copper plate 12 is not restricted, and a water seal between the copper plate 12 and the back plate 15 can be performed.

ここで、水シール機構１０において、内側シール座金１８の内周面とボルト１３の非ねじ部の外周面との隙間ｂ１を、ボルト１３の非ねじ部の外周面とボルト貫通孔１４の内周面との隙間ａ以下とする（ｂ１≦ａ）。水シール構造１０を示す図１には、ボルト１３、ボルト貫通孔１４、外側シール座金１７、及び内側シール座金１８の各中心軸の位置が一致した状態での各部寸法を示す。ここで、ａはボルト１３の非ねじ部の径とボルト貫通孔１４の内周面の径との差の１／２、ｂ１は内側シール座金１８の内径とボルト１３の非ねじ部の径との差の１／２、ｂ２は内側シール座金１８の外径と小径凹部２１の内周面の径との差の１／２、ｂ６は外側シール座金１７の外径と大径凹部２０の内周面の径との差の１／２である。これにより、従来方法のシール部材１０４単独でボルト１３がボルト貫通孔１４内で移動できる隙間を確保するために必要であった大径凹部１０５の内周面の径より小さな径で、ボルト１３がボルト貫通孔１４内で移動できる隙間を確保できる。 Here, in the water seal mechanism 10, the gap b 1 between the inner peripheral surface of the inner seal washer 18 and the outer peripheral surface of the non-threaded portion of the bolt 13 is defined as the outer peripheral surface of the non-threaded portion of the bolt 13 and the inner periphery of the bolt through hole 14. It is set as below the clearance a with the surface (b1 ≦ a). FIG. 1 showing the water seal structure 10 shows the dimensions of the bolts 13, the bolt through holes 14, the outer seal washer 17, and the inner seal washer 18 in the state where the positions of the central axes coincide with each other. Here, a is 1/2 of the difference between the diameter of the non-threaded portion of the bolt 13 and the diameter of the inner peripheral surface of the bolt through hole 14, and b1 is the inner diameter of the inner seal washer 18 and the diameter of the non-threaded portion of the bolt 13. ½, b2 is ½ of the difference between the outer diameter of the inner seal washer 18 and the diameter of the inner peripheral surface of the small-diameter recess 21, and b6 is the inner diameter of the outer seal washer 17 and the large-diameter recess 20. It is 1/2 of the difference from the diameter of the peripheral surface. As a result, the bolt 13 has a diameter smaller than the diameter of the inner peripheral surface of the large-diameter recess 105, which is necessary to secure a gap in which the bolt 13 can move in the bolt through hole 14 by the conventional seal member 104 alone. A gap that can move in the bolt through hole 14 can be secured.

また、内側シール座金１８が、ボルト１３が熱延びによってａ移動できるように、内側シール座金１８の外周面と小径凹部２１の内周面との隙間ｂ２を、ボルト１３の非ねじ部の外周面とボルト貫通孔１４の内周面との隙間ａと内側シール座金１８の内周面とボルト１３の非ねじ部の外周面との隙間ｂ１との差以上とする（ｂ２≧ａ−ｂ１）。
そして、内側シール座金１８の第１のＯリング溝２２ａの溝端とボルト貫通孔端１４までの寸法（すなわち、内側シール座金１８の第１のＯリング溝２２ａの内径とボルト貫通孔１４の内周面の径との差の１／２である）ｂ３は、ボルト１３が熱延びによって移動しても第１のＯリング２２がボルト貫通孔１４にはみ出さないように、ｂ１以上とする（ｂ３≧ｂ１）。 In addition, the gap b2 between the outer peripheral surface of the inner seal washer 18 and the inner peripheral surface of the small-diameter concave portion 21 is set so that the inner seal washer 18 can be moved a by the thermal extension of the bolt 13. And the difference between the clearance a between the inner peripheral surface of the bolt through hole 14 and the clearance b1 between the inner peripheral surface of the inner seal washer 18 and the outer peripheral surface of the non-threaded portion of the bolt 13 (b2 ≧ a−b1).
The dimension between the groove end of the first O-ring groove 22a of the inner seal washer 18 and the bolt through-hole end 14 (that is, the inner diameter of the first O-ring groove 22a of the inner seal washer 18 and the inner periphery of the bolt through-hole 14). B3 is equal to or greater than b1 so that the first O-ring 22 does not protrude into the bolt through-hole 14 even if the bolt 13 moves due to thermal extension (b3). ≧ b1).

更に、外側シール座金１７の内径には、ボルト１３との水シールを行うための第２のＯリング２３が装着されている。外側シール座金１７が、ボルト１３が熱延びによってａ移動できるように、外側シール座金１７の外周面と大径凹部２０の内周面との隙間ｂ６は、ボルト１３の非ねじ部の外周面とボルト貫通孔１４の内周面との隙間ａ以上に設定されている（ｂ６≧ａ）。
また、ボルト１３が熱延びによって移動しても第３のＯリング２４が内側シール座金１８からはみ出さないように、外側シール座金１７の第３のＯリング溝２４ａの溝外径と内側シール座金１８の外径との差の１／２であるｂ４は、ｂ１以上（ｂ４≧ｂ１）とし、さらに、外側シール座金１７の第３のＯリング溝２４ａの溝内径と内側シール座金１８の内径との差の１／２であるｂ５は、ｂ１以上（ｂ５≧ｂ１）とする。
なお、小径凹部２１の内周面の径は、大径凹部２０の内周面の径以下である。 Further, a second O-ring 23 for water-sealing with the bolt 13 is attached to the inner diameter of the outer seal washer 17. The clearance b6 between the outer peripheral surface of the outer seal washer 17 and the inner peripheral surface of the large-diameter concave portion 20 is different from the outer peripheral surface of the non-threaded portion of the bolt 13 so that the outer seal washer 17 can move a by the thermal extension of the bolt 13. It is set to be equal to or larger than the clearance a with the inner peripheral surface of the bolt through hole 14 (b6 ≧ a).
Further, the outer diameter of the third O-ring groove 24a of the outer seal washer 17 and the inner seal washer are prevented so that the third O-ring 24 does not protrude from the inner seal washer 18 even if the bolt 13 is moved by hot extension. B4 which is ½ of the difference from the outer diameter of 18 is b1 or more (b4 ≧ b1), and the inner diameter of the third O-ring groove 24a of the outer seal washer 17 and the inner diameter of the inner seal washer 18 are B5, which is ½ of the difference, is set to b1 or more (b5 ≧ b1).
Note that the diameter of the inner peripheral surface of the small-diameter concave portion 21 is equal to or smaller than the diameter of the inner peripheral surface of the large-diameter concave portion 20.

そして、内側シール座金１８の高さは、小径凹部２１の深さより大きい（すなわち、内側シール座金１８が小径凹部２１に収納された際に、内側シール座金１８は小径凹部２１から突出している）。これにより、図２に示すように、ボルト１３が銅板１２の熱伸びに応じてａだけ移動しても、第３のＯリング２４はシール面である内側シール座金１８の外面より外れることがなく、第１のＯリング２２はシール面である小径凹部２１の底面より外れることがなく、水シールを行うことができる。更に、外側シール座金１７が大径凹部２０に収納された際に、小径凹部２１内に収納された内側シール座金１８を外側シール座金１７を介して複数の皿バネ１６で銅板１２側に向けて付勢することができ、第１のＯリング２２によりボルト貫通孔１４と小径凹部２１との間の水シール及び外側シール座金１７と内側シール座金１８の間の水シールを確実に行うことができる。また、外側シール座金１７が小径凹部２１の内周面に接触するのが防止でき、銅板１２の熱伸びに応じてボルト１３をボルト貫通孔１４内で移動させることができる。 The height of the inner seal washer 18 is larger than the depth of the small-diameter recess 21 (that is, when the inner seal washer 18 is stored in the small-diameter recess 21, the inner seal washer 18 protrudes from the small-diameter recess 21). As a result, as shown in FIG. 2, even if the bolt 13 moves by a according to the thermal elongation of the copper plate 12, the third O-ring 24 does not come off from the outer surface of the inner seal washer 18 that is the sealing surface. The first O-ring 22 does not come off from the bottom surface of the small-diameter recess 21 that is a sealing surface, and can perform water sealing. Further, when the outer seal washer 17 is accommodated in the large-diameter recess 20, the inner seal washer 18 accommodated in the small-diameter recess 21 is directed toward the copper plate 12 by the plurality of disc springs 16 via the outer seal washer 17. The first O-ring 22 can reliably perform the water seal between the bolt through hole 14 and the small-diameter recess 21 and the water seal between the outer seal washer 17 and the inner seal washer 18. . Further, the outer seal washer 17 can be prevented from coming into contact with the inner peripheral surface of the small-diameter concave portion 21, and the bolt 13 can be moved in the bolt through hole 14 in accordance with the thermal expansion of the copper plate 12.

続いて、図３に示す既存の電磁撹拌機付きスラブモールド１００における水シール機構１０１における大径凹部１０５の内周面の径寸法について、具体例を用いて説明する。図３には、銅板１２に螺合しているボルト１３、ボルト貫通孔１４、シール部材１０４の各中心軸の位置が一致した状態での各部寸法を示す。ここで、ａはボルト１３の非ねじ部の外周面とボルト貫通孔１４の内周面との隙間であって、ボルト１３の非ねじ部の径とボルト貫通孔１４の内周面の径との差の１／２、ｂ８はボルト貫通孔１４の内周面とＯリング１０３のＯリング溝１０６の内周面との隙間であって、Ｏリング溝１０６の内径とボルト貫通孔１４の内周面の径との差の１／２、ｂ９はシール部材１０４の外周面と大径凹部１０５の内周面との隙間であって、シール部材１０４の外径と大径凹部１０５の内周面の径との差の１／２である。
図３に示す電磁撹拌機付きスラブモールド１００において、Ｏリング１０３の収納部幅をｘ１とする。シール部材１０４は、銅板１２の熱延びに応じてボルト１３とともに移動する。このため、ｂ９はａ以上必要である。（ｂ９≧ａ）。更に、ｂ８も同様にａ以上必要である（ｂ８≧ａ）。これにより、銅板１２が膨張し（熱伸びし）ａだけ移動した際、ボルト１３を介してシール部材１０４もａだけ移動できる。このとき、ボルト１３の非ねじ部の径をｄとすると、大径凹部１０５の内周面の径Ｄ１は２＊（３ａ＋ｘ１）+ｄとなる。また、銅板１２が膨張しａだけ移動した際に、Ｏリング１０３が大径凹部１０５の環状底部より外れてボルト貫通孔１４に落ち込むこともない。 Next, the diameter of the inner peripheral surface of the large-diameter recess 105 in the water seal mechanism 101 in the existing slab mold 100 with an electromagnetic stirrer shown in FIG. 3 will be described using a specific example. FIG. 3 shows the dimensions of each part in a state where the positions of the central axes of the bolt 13, the bolt through hole 14, and the seal member 104 that are screwed into the copper plate 12 are matched. Here, a is a gap between the outer peripheral surface of the non-threaded portion of the bolt 13 and the inner peripheral surface of the bolt through-hole 14, and the diameter of the non-threaded portion of the bolt 13 and the diameter of the inner peripheral surface of the bolt through-hole 14 ½, b8 is a gap between the inner peripheral surface of the bolt through hole 14 and the inner peripheral surface of the O ring groove 106 of the O ring 103, and the inner diameter of the O ring groove 106 and the inner diameter of the bolt through hole 14 are 1/2 of the difference from the diameter of the peripheral surface, b9 is a gap between the outer peripheral surface of the seal member 104 and the inner peripheral surface of the large-diameter recess 105, and the outer diameter of the seal member 104 and the inner periphery of the large-diameter recess 105 It is 1/2 of the difference from the surface diameter.
In the slab mold 100 with an electromagnetic stirrer shown in FIG. 3, the storage width of the O-ring 103 is x1. The seal member 104 moves together with the bolts 13 in accordance with the hot extension of the copper plate 12. For this reason, b9 needs to be a or more. (B9 ≧ a). Further, b8 is also required to be a or more (b8 ≧ a). Thereby, when the copper plate 12 expands (thermally expands) and moves by a, the seal member 104 can also move by a through the bolt 13. At this time, if the diameter of the non-threaded portion of the bolt 13 is d, the diameter D1 of the inner peripheral surface of the large-diameter recess 105 is 2 * (3a + x1) + d. Further, when the copper plate 12 expands and moves by a, the O-ring 103 does not come off the annular bottom portion of the large-diameter recess 105 and falls into the bolt through hole 14.

続いて、図１に示す水シール機構１０における大径凹部２０の内周面の径寸法について、例を用いて説明する。
図３と同様に、ボルト１３の非ねじ部の外周面とボルト貫通孔１４の内周面との隙間をａとし、第１のＯリング２２の収納部幅（第１のＯリング溝２２ａの内径と内側シール座金１８の外径との差の半分）をｘ２とする。外側シール座金１７の外周面と大径凹部２０の内周面との隙間ｂ６をａと同一にし、更に内側シール座金１８の内周面とボルト１３の非ねじ部の外周面との隙間ｂ１をａ／２及び内側シール座金１８の外周面と小径凹部２１の内周面との隙間ｂ２をａ／２とする。この時、内側シール座金１８の第１のＯリング溝２２ａの内周面とボルト貫通孔１４の内周面までの寸法（すなわち、内側シール座金１８の第１のＯリング溝２２ａ内径とボルト貫通孔１４の内周面の径との差の１／２である）ｂ３は、少なくともａ／２となり、外側シール座金１７の第３のＯリング溝２４ａの外周面と内側シール座金１８の外周面との隙間（すなわち、内側シール座金１８の外径と外側シール座金１７の第３のＯリング溝２４ａの溝外径との差の１／２である）ｂ４は、少なくともａ／２となる。なお、ｘ３は第３のＯリング溝２４ａの幅、ｂ７は大径凹部２０の内周面と小径凹部２１の内周面との隙間である。ここで、第３のＯリング２４の収納部幅をｘ４とし、ｘ１＝ｘ２＝ｘ４の場合、大径凹部２０の内周面の径Ｄ２はｄ＋２＊（２ａ＋ｘ１）となる。すなわち、図１に示す水シール機構１０の大径凹部２０の内周面の径は、図３の既存の水シール機構１０１の大径凹部１０５の内周面の径に比較して２ａだけ小さくすることが可能となる。 Then, the diameter dimension of the internal peripheral surface of the large diameter recessed part 20 in the water seal mechanism 10 shown in FIG. 1 is demonstrated using an example.
As in FIG. 3, the clearance between the outer peripheral surface of the non-threaded portion of the bolt 13 and the inner peripheral surface of the bolt through hole 14 is a, and the storage width of the first O-ring 22 (the first O-ring groove 22a X2 is half of the difference between the inner diameter and the outer diameter of the inner seal washer 18). The gap b6 between the outer peripheral surface of the outer seal washer 17 and the inner peripheral surface of the large-diameter recess 20 is the same as a, and further, the gap b1 between the inner peripheral surface of the inner seal washer 18 and the outer peripheral surface of the non-threaded portion of the bolt 13 is set. The clearance b2 between the outer peripheral surface of a / 2 and the inner seal washer 18 and the inner peripheral surface of the small-diameter concave portion 21 is defined as a / 2. At this time, the dimension between the inner peripheral surface of the first O-ring groove 22a of the inner seal washer 18 and the inner peripheral surface of the bolt through hole 14 (that is, the inner diameter of the first O-ring groove 22a of the inner seal washer 18 and the bolt penetration). B3 (which is 1/2 of the difference from the diameter of the inner peripheral surface of the hole 14) is at least a / 2, and the outer peripheral surface of the third O-ring groove 24a of the outer seal washer 17 and the outer peripheral surface of the inner seal washer 18 B4 (that is, 1/2 of the difference between the outer diameter of the inner seal washer 18 and the outer diameter of the third O-ring groove 24a of the outer seal washer 17) is at least a / 2. X3 is the width of the third O-ring groove 24a, and b7 is the gap between the inner peripheral surface of the large-diameter recess 20 and the inner peripheral surface of the small-diameter recess 21. Here, when the storage width of the third O-ring 24 is x4 and x1 = x2 = x4, the diameter D2 of the inner peripheral surface of the large-diameter recess 20 is d + 2 * (2a + x1). That is, the diameter of the inner peripheral surface of the large-diameter recess 20 of the water seal mechanism 10 shown in FIG. 1 is smaller by 2a than the diameter of the inner peripheral surface of the large-diameter recess 105 of the existing water seal mechanism 101 of FIG. It becomes possible to do.

以上、本発明を、実施の形態を参照して説明してきたが、本発明は何ら上記した実施の形態に記載した構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。
例えば、内側シール座金１８の外周面と大径凹部２０の内周面との隙間ｂ２、内側シール座金１８の内周面とボルト１３の非ねじ部の外周面との隙間ｂ１は、ａ／２に固定するものではなく、ｂ１＋ｂ２≧ａ、かつ、ｂ１≦ａとなるようにｂ１、ｂ２を選定することが可能である。
また、大径凹部２０の内周面の径の値は、外側シール座金１７の外径にａを加えた値としたが、スペース上問題がなければ、外側シール座金１７の外径にａを加えた値より大きくすることも可能である。
更に、小径凹部２１の内周面の径の値は大径凹部２０の内周面の径の値以下であればよく、この場合、ｂ１＋ｂ２≧ａとなる。
なお、本発明においては、大径凹部の内周面と外側シール座金の外周面との隙間＝（大径凹部の内周面の径−外側シール座金の外径）／２、内側シール座金の内周面とボルトの非ねじ部の外周面との隙間＝（内側シール座金の内径−ボルトの非ねじ部の径）／２、小径凹部の内周面と内側シール座金の外周面との隙間＝（小径凹部の内周面の径−内側シール座金の外径）／２、ボルト貫通孔の内周面とボルトの非ねじ部の外周面との隙間＝（ボルト貫通孔の内周面の径−ボルトの非ねじ部の径）／２として、説明している。 As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, the clearance b2 between the outer peripheral surface of the inner seal washer 18 and the inner peripheral surface of the large-diameter recess 20 and the clearance b1 between the inner peripheral surface of the inner seal washer 18 and the outer peripheral surface of the non-threaded portion of the bolt 13 are a / 2. It is possible to select b1 and b2 so that b1 + b2 ≧ a and b1 ≦ a.
Further, the value of the diameter of the inner peripheral surface of the large-diameter recess 20 is a value obtained by adding a to the outer diameter of the outer seal washer 17, but if there is no problem in space, a is added to the outer diameter of the outer seal washer 17. It is also possible to make it larger than the added value.
Furthermore, the value of the diameter of the inner peripheral surface of the small-diameter recess 21 may be equal to or less than the value of the diameter of the inner peripheral surface of the large-diameter recess 20, and in this case, b1 + b2 ≧ a.
In the present invention, the gap between the inner peripheral surface of the large-diameter recess and the outer peripheral surface of the outer seal washer = (the diameter of the inner peripheral surface of the large-diameter recess—the outer diameter of the outer seal washer) / 2, Gap between the inner peripheral surface and the outer peripheral surface of the non-threaded portion of the bolt = (inner seal washer inner diameter−bolt non-threaded portion diameter) / 2, the clearance between the inner peripheral surface of the small-diameter recess and the outer peripheral surface of the inner seal washer = (Diameter of inner peripheral surface of small-diameter recess-outer diameter of inner seal washer) / 2, clearance between inner peripheral surface of bolt through hole and outer peripheral surface of non-threaded portion of bolt = (inner peripheral surface of bolt through hole (Diameter—diameter of non-threaded portion of bolt) / 2.

１０：水シール機構、１１：スリット溝、１２：銅板、１３：ボルト、１４：ボルト貫通孔、１５：バックプレート、１６：皿バネ、１７：外側シール座金、１８：内側シール座金、１９：ボルト頭部、２０：大径凹部、２１：小径凹部、２２：第１のＯリング、２２ａ：第１のＯリング溝、２３：第２のＯリング、２３ａ：第２のＯリング溝、２４：第３のＯリング、２４ａ：第３のＯリング溝 10: water seal mechanism, 11: slit groove, 12: copper plate, 13: bolt, 14: bolt through hole, 15: back plate, 16: disc spring, 17: outer seal washer, 18: inner seal washer, 19: bolt Head: 20: Large-diameter recess, 21: Small-diameter recess, 22: First O-ring, 22a: First O-ring groove, 23: Second O-ring, 23a: Second O-ring groove, 24: Third O-ring, 24a: third O-ring groove

Claims (4)

裏面側に冷却水の流路となるスリット溝が多数形成された銅板と、該銅板の裏面に当接し、ボルト貫通孔を介して装着されたボルトの先部のみに形成されている雄ねじを前記銅板に螺合させて該銅板に固着されるバックプレートとを有し、前記ボルトの頭部と前記ボルト貫通孔の間に弾性部材を介して、該ボルトが挿通する前記バックプレートの大径凹部の環状底部に形成された小径凹部に押圧される水シール機構が設けられた連続鋳造鋳型の水シール構造において、
前記水シール機構に、前記小径凹部に装着される内側シール座金と、該内側シール座金に当接し前記大径凹部に移動可能に配置された外側シール座金とを用い、前記内側シール座金に前記小径凹部の底面に当接する第１のＯリングを装着する第１のＯリング溝を設け、前記外側シール座金に、前記ボルトの非ねじ部に当接する第２のＯリングを装着する第２のＯリング溝を設けると共に、前記内側シール座金に当接する第３のＯリングを備えた第３のＯリング溝を設けたことを特徴とする連続鋳造鋳型の水シール構造。 A copper plate in which a large number of slit grooves serving as cooling water flow paths are formed on the back surface side, and a male screw that is in contact with the back surface of the copper plate and is formed only on the tip of a bolt that is mounted via a bolt through hole. A back plate fixed to the copper plate by being screwed to the copper plate, and a large-diameter concave portion of the back plate through which the bolt is inserted through an elastic member between the head of the bolt and the bolt through hole. In the water seal structure of a continuous casting mold provided with a water seal mechanism that is pressed against a small-diameter recess formed in the annular bottom of
The water seal mechanism uses an inner seal washer mounted on the small-diameter recess and an outer seal washer that is in contact with the inner seal washer and is movably disposed in the large-diameter recess. A first O-ring groove for mounting a first O-ring that contacts the bottom surface of the recess is provided, and a second O-ring for mounting a second O-ring that contacts the non-threaded portion of the bolt is provided on the outer seal washer. A water-sealing structure for a continuous casting mold, wherein a ring groove is provided, and a third O-ring groove provided with a third O-ring that abuts against the inner seal washer is provided. 請求項１記載の連続鋳造鋳型の水シール構造において、前記弾性部材は複数の皿ばねからなることを特徴とする連続鋳造鋳型の水シール構造。 2. The water seal structure for a continuous casting mold according to claim 1, wherein the elastic member comprises a plurality of disc springs. 請求項１及び２のいずれか１項に記載の連続鋳造鋳型の水シール構造において、前記内側シール座金の内周面と前記ボルトの非ねじ部の外周面との隙間は、該ボルトの非ねじ部の外周面と該ボルト貫通孔の内周面との隙間以下とすることを特徴とする連続鋳造鋳型の水シール構造。 3. The water-sealing structure for a continuous casting mold according to claim 1, wherein a gap between an inner peripheral surface of the inner seal washer and an outer peripheral surface of the non-threaded portion of the bolt is a non-screw of the bolt. A water-sealing structure for a continuous casting mold, characterized in that the gap is equal to or less than the gap between the outer peripheral surface of the portion and the inner peripheral surface of the bolt through hole. 請求項１〜３のいずれか１項に記載の連続鋳造鋳型の水シール構造において、前記小径凹部の内周面の径は、前記大径凹部の内周面の径以下であり、前記外側シール座金の外周面と前記大径凹部の内周面との隙間は、前記ボルトの非ねじ部の外周面と前記ボルト貫通孔の内周面との隙間以上に設定され、前記内側シール座金の外周面と前記小径凹部の内周面との隙間及び該内側シール座金の内周面と該ボルトの非ねじ部の外周面との隙間の合計は、該ボルトの非ねじ部の外周面と該ボルト貫通孔の内周面との隙間以上に設定され、該内側シール座金の内周面と該ボルトの非ねじ部の外周面との隙間は、該内側シール座金の第１のＯリング溝の内径と該ボルト貫通孔の内周面の径との差の１／２以下に設定され、該内側シール座金の高さは、該小径凹部の深さより大きいことを特徴とする連続鋳造鋳型の水シール構造。 The water seal structure of the continuous casting mold according to any one of claims 1 to 3, wherein a diameter of an inner peripheral surface of the small-diameter recess is equal to or less than a diameter of an inner peripheral surface of the large-diameter recess, and the outer seal The clearance between the outer peripheral surface of the washer and the inner peripheral surface of the large-diameter recess is set to be greater than or equal to the clearance between the outer peripheral surface of the non-threaded portion of the bolt and the inner peripheral surface of the bolt through hole, and the outer periphery of the inner seal washer The total of the clearance between the surface and the inner peripheral surface of the small-diameter recess and the clearance between the inner peripheral surface of the inner seal washer and the outer peripheral surface of the non-threaded portion of the bolt is the sum of the outer peripheral surface of the non-threaded portion of the bolt and the bolt The clearance between the inner peripheral surface of the inner seal washer and the outer peripheral surface of the non-threaded portion of the bolt is set to be larger than the clearance between the inner peripheral surface of the through hole and the inner diameter of the first O-ring groove of the inner seal washer. And the diameter of the inner peripheral surface of the bolt through hole is set to be 1/2 or less, and the height of the inner seal washer is Water seal structure of the continuous casting mold being greater than the depth of the diameter recess.
JP2009101172A 2009-04-17 2009-04-17 Water seal structure of continuous casting mold Expired - Fee Related JP5364428B2 (en)

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