JP3941136B2

JP3941136B2 - Roll seal device

Info

Publication number: JP3941136B2
Application number: JP21538296A
Authority: JP
Inventors: 博田中
Original assignee: Daido Steel Co Ltd
Current assignee: Daido Steel Co Ltd
Priority date: 1996-07-25
Filing date: 1996-07-25
Publication date: 2007-07-04
Anticipated expiration: 2016-07-25
Also published as: JPH1046261A

Description

【０００１】
【発明の属する技術分野】
本発明は、帯状ステンレス鋼板等の金属ストリップの連続光輝焼鈍炉，無酸化焼鈍炉、或いは連続塗装設備等、可燃性雰囲気ガスが炉内に充満している連続炉において、炉内圧力を所要圧力に保ち、出入口部からの炉内ガスの漏出量を低下させるために設けられるロールシール装置に関するものである。
【０００２】
【従来の技術】
連続炉における金属ストリップの出入口部に設けられるロールシール装置は、連続炉の入口または出口に金属ストリップを両側から挟むように一対の回転ロール（シールロール）が設けられ、該ロールは金属ストリップを傷付けないように表面にシリコーンゴム等の弾性体がライニングされ、該ロールを金属ストリップの移動に従いモータにより同調回転させている。そして、該連続炉の出入口部の開口縁に設けられたフェルトを該ロールの外周面に圧着させることにより炉内ガスの漏出を抑制している。
【０００３】
ところが、このような従来のフェルトによるロールシール装置ではフェルトおよびロール摩耗により隙間が生じその隙間から炉内ガスが漏洩しシール性を低下させる危険があった。
【０００４】
【発明が解決しようとする課題】
そこで本発明はシール性の優れたロールシール装置を提供するものである。
【０００５】
【課題を解決するための手段】
そのために本発明は、連続炉の出入口部に金属ストリップを両面より挟着する一対の回転ロールを設けると共に、該出入口部の開口縁に一対のチャンバを形成し、該各チャンバに非通気性であって膨縮性のある弾性隔膜を前記各回転ロールの外周面と相対するように気密に張設し、該各チャンバにガスを圧送して該チャンバ内の圧力を制御し弾性隔膜を膨縮させることにより該弾性隔膜を回転ロールの外周面に圧接させてなることを特徴とする。
また本発明は上記ロールシール装置において、弾性隔膜は表面に低摩擦，耐摩耗性の織布を張設したものであることを特徴とする。
【０００６】
【発明の実施の形態】
次に図面に従い本発明の実施の形態を竪形炉の下方入口部について説明する。図１に竪形炉１の下方入口部の側面を示し、図２にその断面図を示す。同図において、竪形炉１の下端に垂設された筒部２の開口縁にフランジ３が形成され、該フランジ３には図３に示したようにボルト４，４…を長孔６に通すことにより一対の側板５，５を該筒部２の入口両側に垂下するように固設している。
【０００７】
７，７は側板５，５の外側に設けられた軸受片１９に両端部を支持して水平に設けられた一対の支点軸で、該支点軸７，７に一対の可動板８，８を回転自在に支持している。９は筒部２の外側面に垂直に固設した空圧シリンダで、該空圧シリンダ９のピストン軸先端に一対のロッド１０，１０を枢支し該ロッドの先端を可動板８，８の上端部に枢着している。このため該空圧シリンダ９が作動すると可動板８，８は支点軸７，７を支点として逆八字状に傾動し得るように構成されている。
【０００８】
２０，２０は金属ロールの外周面にシリコーンゴム，ウレタンゴム，クロロプレンゴム，ＥＰＤＭゴム或いは繊維布等の弾性体２５をランニングしてなる回転ロールで、該回転ロール２０，２０の両端より突出している回転軸２１，２１を側板５，５に開設された円弧状の透孔２２に貫通させ該回転軸を可動板８，８に固設した軸受２３，２３により回転自在に支持している。このため空圧シリンダ９のピストン軸を収縮させ両可動板を起立させると回転ロール２０，２０の間隔が狭くなり金属ストリップ２４を気密に挟着し得る。
【０００９】
２６，２６はボルト５１によりフランジ３の下側に固設された一対のチャンバである。該各チャンバ２６，２６は回転ロール２０，２０の表面と相対するように弾性隔膜２７を下面開口に張設している。弾性隔膜２７は図４に拡大して示したようにネオプレンゴムからなる１ミリ程度の厚さの長方形板状の非通気性の弾性板２８の表面にスポンジゴムからなるクッション材２９を貼着し、さらにその表面にナイロン生地等の低摩擦，耐摩耗性の織布３０を張設してなる。そして、該弾性板２８の周縁部を枠状の当板３１によりチャンバ２６，２６の開口縁に挟着しボルト３３により締付すると共に、フラット棒状の押え金３２により該織布３０の両側縁を該当板３１上に挟着し、該押え金３２，３２にボルト３４を貫挿し該ボルト３４を締付することにより、該弾性隔膜２７をチャンバ２６，２６の下面開口に気密に張設している。３５，３５は該チャンバ２６，２６に接続された給気ホースで、該給気ホース３５，３５は圧力調節弁（図示せず）を介して液化窒素タンク等の圧力ガスの給ガス源に接続され、窒素または空気等のガスを適宜圧力でチャンバ２６，２６に供給し得るように構成している。
【００１０】
また、３６は側板５，５の内側とチャンバ２６，２６の外側との間に介在させたスポンジゴムからなる通気遮断用弾性体である。また、３７は同じく側板５，５の内側と回転ロール２０，２０の両端面間に介在させたスポンジゴムからなる環状形の通気遮断用弾性体、３８，３８は該弾性体３７の両側に介在させた薄板状のステンレスワッシャ、３９は摩擦抵抗軽減のためのテフロン製ワッシャである。
【００１１】
４０，４０は銅，鋼，ステンレス鋼等の良導電性材料により形成さたれ金属ロールで、該金属ロール４０，４０の回転軸４１，４１を軸受４２，４２に回転自在に支持している。４３，４３は側板５，５の内側面に突設された支軸で、図５に示したように該支軸４３，４３に回転自在なるように設けられたスリーブ４４，４４にボルト４５，４５を突設し、該ボルト４５，４５を軸受４２，４２に一体に形成された筒部４９，４９に螺合すると共に、該スリーブ４４，４４の外周より水平方向にリンク４６，４６を突設し、該リンク４６，４６の先端にピン４７，４７を介して重錘４８，４８を吊下している。こうして金属ロール４０，４０は支軸４３，４３により揺動可能に支持されると共に、該重錘４８，４８の重力により該金属ロール４０，４０を回転ロール２０，２０の表面に常に弾性的に接触させている。このため、回転ロール２０，２０の表面の弾性体にその回転に伴い発生する静電気が良導電性の金属ロール４０，４０を通して放電され、スパークの発生で爆発，火災等の事故が起きるのを防止している。
【００１２】
このように構成したロールシール装置では、給気ホース３５，３５より供給するチャンバ２６，２６内のガスの圧力を調整することにより弾性隔膜２７を膨縮させ該弾性隔膜２７を回転ロール２０，２０の表面に適宜圧力で圧接させることができるので、回転ロール２０，２０の回転に過大な抵抗を及ぼすことなくその隙間を確実にシールでき炉内の可燃性ガスの漏出を極力低下させ金属ストリップ２４を竪形炉１内に安全に搬入することができる。なお、弾性隔膜２７の表面に織布３０を張設したことにより上記摩擦抵抗を一層軽減できる。なお、ボルト４を緩めることにより長孔６の範囲で側板５の取付位置を調節できるので、側板５により弾性体３６および弾性体３７を適度に押圧させることでガスシール性が保たれるようにできる。
【００１３】
【発明の効果】
このように本発明は、ロールシール装置において炉内ガスを確実にシールできる効果がある。
【図面の簡単な説明】
【図１】本発明に係る連続炉のロールシール装置の側面図。
【図２】本発明に係る連続炉のロールシール装置の断面図。
【図３】図２の要部の縦断面図。
【図４】図２のＡ−Ａ線拡大断面図。
【図５】図２のＢ−Ｂ線断面矢視図。
【符号の説明】
１竪形炉
５側板
２０回転ロール
２４金属ストリップ
２５弾性体
２６チャンバ
２７弾性隔膜
２８弾性板
２９クッション材
３０織布
３５給気ホース[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous furnace in which a combustible atmosphere gas is filled in a continuous bright annealing furnace, a non-oxidation annealing furnace, or a continuous coating facility for a metal strip such as a strip-shaped stainless steel plate. It is related with the roll-seal apparatus provided in order to maintain and to reduce the leakage amount of the gas in a furnace from an entrance / exit part.
[0002]
[Prior art]
A roll seal device provided at the entrance and exit of a metal strip in a continuous furnace is provided with a pair of rotating rolls (seal rolls) so that the metal strip is sandwiched from both sides at the entrance or exit of the continuous furnace, and the roll damages the metal strip. The surface is lined with an elastic body such as silicone rubber, and the roll is synchronously rotated by a motor according to the movement of the metal strip. And the leak provided in the furnace is suppressed by pressing the felt provided in the opening edge of the entrance / exit part of this continuous furnace to the outer peripheral surface of this roll.
[0003]
However, in such a conventional roll seal apparatus using felt, there is a risk that a gap is generated due to wear of the felt and the roll, and gas in the furnace leaks from the gap to deteriorate the sealing performance.
[0004]
[Problems to be solved by the invention]
Therefore, the present invention provides a roll seal device having excellent sealing properties.
[0005]
[Means for Solving the Problems]
For this purpose, the present invention provides a pair of rotating rolls that sandwich the metal strip from both sides at the inlet / outlet portion of the continuous furnace, and forms a pair of chambers at the opening edge of the inlet / outlet portion. In addition, an elastic diaphragm having an expansion / contraction property is hermetically stretched so as to face the outer peripheral surface of each rotary roll, and gas is pumped into each chamber to control the pressure in the chamber to expand and contract the elastic diaphragm. characterized by comprising by pressing the elastic membrane to the outer peripheral surface of the rotating roll by.
In the roll seal device according to the present invention, the elastic diaphragm is formed by stretching a low-friction, wear-resistant woven fabric on the surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with respect to the lower inlet portion of the vertical furnace according to the drawings. FIG. 1 shows a side surface of the lower inlet portion of the vertical furnace 1, and FIG. 2 shows a cross-sectional view thereof. In the figure, a flange 3 is formed at the opening edge of a cylindrical portion 2 suspended from the lower end of the vertical furnace 1, and bolts 4, 4... Are formed in the flange 3 as shown in FIG. The pair of side plates 5 and 5 are fixed so as to hang down on both sides of the inlet of the cylindrical portion 2 by passing through.
[0007]
7 and 7 are a pair of fulcrum shafts that are horizontally provided with both ends supported by bearing pieces 19 provided outside the side plates 5 and 5, and a pair of movable plates 8 and 8 are provided on the fulcrum shafts 7 and 7. It is supported rotatably. Reference numeral 9 denotes a pneumatic cylinder fixed perpendicularly to the outer surface of the cylindrical portion 2. A pair of rods 10, 10 are pivotally supported at the piston shaft tip of the pneumatic cylinder 9, and the tips of the rods are connected to the movable plates 8, 8. It is pivotally attached to the upper end. Therefore, when the pneumatic cylinder 9 is actuated, the movable plates 8 and 8 can be tilted in an inverted eight-character shape with the fulcrum shafts 7 and 7 as fulcrums.
[0008]
Reference numerals 20 and 20 denote rotating rolls obtained by running an elastic body 25 such as silicone rubber, urethane rubber, chloroprene rubber, EPDM rubber or fiber cloth on the outer peripheral surface of the metal roll, and protrude from both ends of the rotating rolls 20 and 20. The rotary shafts 21, 21 are passed through arc-shaped through holes 22 provided in the side plates 5, 5, and the rotary shafts are rotatably supported by bearings 23, 23 fixed to the movable plates 8, 8. For this reason, when the piston shaft of the pneumatic cylinder 9 is contracted and both movable plates are erected, the interval between the rotary rolls 20 and 20 becomes narrow, and the metal strip 24 can be airtightly sandwiched.
[0009]
Reference numerals 26 and 26 denote a pair of chambers fixed to the lower side of the flange 3 by bolts 51. Each chamber 26, 26 has an elastic diaphragm 27 stretched on the lower surface opening so as to face the surface of the rotary rolls 20, 20. As shown in an enlarged view in FIG. 4, the elastic diaphragm 27 is formed by attaching a cushion material 29 made of sponge rubber on the surface of a non-breathable elastic plate 28 having a thickness of about 1 mm made of neoprene rubber and having a thickness of about 1 mm. Further, a low-friction and wear-resistant woven fabric 30 such as nylon fabric is stretched on the surface. The peripheral edge of the elastic plate 28 is sandwiched between the opening edges of the chambers 26 and 26 by a frame-shaped contact plate 31 and fastened by bolts 33, and the both side edges of the woven fabric 30 are fixed by a flat bar-shaped presser foot 32. Is clamped on the corresponding plate 31, and a bolt 34 is inserted into the pressers 32, 32 and the bolt 34 is tightened, whereby the elastic diaphragm 27 is tightly stretched on the lower surface openings of the chambers 26, 26. ing. Reference numerals 35, 35 denote air supply hoses connected to the chambers 26, 26. The air supply hoses 35, 35 are connected to a pressure gas supply source such as a liquefied nitrogen tank via a pressure control valve (not shown). Further, a gas such as nitrogen or air can be supplied to the chambers 26 and 26 at an appropriate pressure.
[0010]
Reference numeral 36 denotes an air-blocking elastic body made of sponge rubber interposed between the inside of the side plates 5 and 5 and the outside of the chambers 26 and 26 . 37 is an annular air-blocking elastic body made of sponge rubber interposed between the inner sides of the side plates 5 and 5 and between both end faces of the rotary rolls 20 and 20, and 38 and 38 are interposed on both sides of the elastic body 37. The thin plate-like stainless steel washer 39 is a Teflon washer for reducing frictional resistance.
[0011]
Reference numerals 40 and 40 denote metal rolls made of a highly conductive material such as copper, steel, and stainless steel, and rotatably support the rotation shafts 41 and 41 of the metal rolls 40 and 40 on bearings 42 and 42, respectively. Reference numerals 43 and 43 denote support shafts projecting from the inner side surfaces of the side plates 5 and 5. As shown in FIG. 5, bolts 45 and 45 are provided on sleeves 44 and 44 that are rotatably provided on the support shafts 43 and 43, respectively. 45, and the bolts 45, 45 are screwed into cylindrical portions 49, 49 formed integrally with the bearings 42, 42, and the links 46, 46 are projected in the horizontal direction from the outer periphery of the sleeves 44, 44. The weights 48 and 48 are suspended from the ends of the links 46 and 46 via pins 47 and 47, respectively. Thus, the metal rolls 40 and 40 are supported by the support shafts 43 and 43 so as to be swingable, and the metal rolls 40 and 40 are always elastically applied to the surfaces of the rotary rolls 20 and 20 by the gravity of the weights 48 and 48. It is in contact. For this reason, the static electricity generated by the rotation of the elastic bodies on the surfaces of the rotary rolls 20 and 20 is discharged through the highly conductive metal rolls 40 and 40 to prevent accidents such as explosions and fires from occurring due to sparks. is doing.
[0012]
In the roll seal device configured as described above, the elastic diaphragm 27 is expanded and contracted by adjusting the pressure of the gas in the chambers 26 and 26 supplied from the air supply hoses 35 and 35 so that the elastic diaphragm 27 is rotated by the rotary rolls 20 and 20. Therefore, the gap can be reliably sealed without exerting excessive resistance to the rotation of the rotary rolls 20 and 20, and the leakage of the combustible gas in the furnace can be reduced as much as possible. Can be safely carried into the vertical furnace 1. The frictional resistance can be further reduced by stretching the woven fabric 30 on the surface of the elastic diaphragm 27. In addition, since the attachment position of the side plate 5 can be adjusted in the range of the long hole 6 by loosening the bolt 4, the gas sealability is maintained by appropriately pressing the elastic body 36 and the elastic body 37 by the side plate 5. it can.
[0013]
【The invention's effect】
As described above, the present invention has an effect of reliably sealing the in-furnace gas in the roll seal device.
[Brief description of the drawings]
FIG. 1 is a side view of a roll seal device for a continuous furnace according to the present invention.
FIG. 2 is a cross-sectional view of a continuous furnace roll seal device according to the present invention.
3 is a longitudinal sectional view of the main part of FIG.
4 is an enlarged cross-sectional view taken along line AA in FIG.
5 is a cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
1 Vertical furnace 5 Side plate 20 Rotating roll 24 Metal strip 25 Elastic body 26 Chamber 27 Elastic diaphragm 28 Elastic plate 29 Cushion material 30 Woven cloth 35 Air supply hose

Claims

A pair of rotating rolls sandwiching the metal strip from both sides is provided at the entrance / exit part of the continuous furnace, and a pair of chambers are formed at the opening edge of the entrance / exit part . the resilient membrane by a certain elastic membrane is stretched tightly to the outer circumferential surface relative to the respective rotating rolls, and pumping gas into the respective chamber inflating and deflating controlled elastic membrane the pressure in the chamber A roll seal device characterized in that is pressed against the outer peripheral surface of the rotary roll.

The roll seal device according to claim 1, wherein the elastic diaphragm is formed by stretching a low-friction, wear-resistant woven fabric on the surface.