200815607 九、發明說明： 【發明所屬之技術領域】 發明領域 本發明係有關於對鋼板進行連續熱處理之連續熱處理 5 爐之密封裝置。 t先前技術3 發明背景200815607 IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a continuous heat treatment of a steel sheet for a continuous heat treatment of a steel plate. t prior art 3 invention background
鋼板之連續熱處理爐係由譬如預熱帶、加熱帶、均熱 帶、冷卻帶構成。一般係對各帶提供相同規格的環境氣體， 10將爐壓維持於正值的同時，並進行鋼板的表面處理（多數場 合係還原）。然而，在表面處理、熱循環、安全性等層面上 有特殊要求事項時，係有需以不同的環境氣體而保持各帶 之必要性。此時，為防止環境氣體混合，係在各帶的交界 部設置密封裝置。 ^ 15 20 譬如’專利文獻1中，揭示一種在急冷帶與過時效帶: 中間’以及徐冷帶與急冷帶的中間，設置錢體密封裝; 之連續燒鈍設備。該氣體密封裝置包含有—挾住通過^ 板且上下相對向之氣體吸弓丨穹 )丨至，以及於該氣體吸引室之? 侧的氣體吹出室。由急冷帶侧 J之乳體"人出室對鋼帶吹出i 自急冷帶的冷卻氣體，並藉由朝 R + 田朝向急冷帶之氣體的流動 防止來自急冷帶之氣體侵入。 ^ . 冋板地，由過時效帶侧之; 體口人出室對鋼帶吹出來自過時 ,^ ^ ^ 寸效▼的裱境氣體，並藉由』 向過時效帶之氣體的流動， 防止來自過時效帶氣 入。氣體吸引室係吸引由兩側 ㈣乱體 】之就體吹出口流入的氣體. 5 200815607 加以排氣。藉此，可防止急冷帶的環境氣體侵入過時效帶。 又，專利讀2揭^種隔著氣航纽止部而連 熱帶與冷卻帶之連續鈍燒爐之環境氣體混合防止裝置1 裝置係於氣體混合防止部之上游側及下游側，分別配設由z 5陶^維外層等組成的密封部，防止均熱帶與冷卻帶:間 的環境氣體混入’前述陶究纖維外層係在按壓狀態下而與 帶鋼之上下面相接觸。再者，藉由經排氣口而排出密封部 之間的小至中的環境氣體，可將小室内的壓力，保持在 权均熱帶之麼力P2及冷卻帶之壓力卩3更低的壓力。 1〇 【專利文獻Π日本專利公開公報特開平㈣咖The continuous heat treatment furnace of the steel plate is composed of, for example, a pre-tropical zone, a heating zone, a soaking zone, and a cooling zone. Generally, the same amount of ambient gas is supplied to each belt, and 10 the furnace pressure is maintained at a positive value, and the surface treatment of the steel sheet is performed (most field reduction). However, when there are special requirements on the surface treatment, thermal cycle, safety, etc., it is necessary to maintain the belts with different environmental gases. At this time, in order to prevent the mixing of the environmental gases, a sealing device is provided at the boundary portion of each belt. ^ 15 20 For example, in Patent Document 1, a continuous blunt device is provided in the middle of the quench zone and the overage band: the middle portion and the middle of the cold zone and the quench zone. The gas sealing device includes a gas blowing chamber that is placed on the side of the gas suction chamber. From the quenching belt side, the "milk body of the J" blows the cooling gas from the quench zone to the steel strip, and prevents the gas from entering the quench zone by the flow of the gas toward the quench zone toward the R + field. ^ . 冋 地 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , From the time-lapse with gas. The gas suction chamber attracts the gas flowing in from the body outlets on both sides (4). 5 200815607 Exhaust. Thereby, it is possible to prevent the ambient gas of the quench zone from intruding into the overage band. Further, Patent Reading 2 discloses that the apparatus for preventing the ambient gas mixture of the continuous blunt furnace of the tropics and the cooling zone is connected to the upstream side and the downstream side of the gas mixture preventing portion, respectively. A sealing portion composed of a z 5 ceramic outer layer or the like prevents the ambient gas from entering between the soaking zone and the cooling zone: the outer layer of the ceramic fiber is in contact with the upper and lower sides of the steel strip in a pressed state. Furthermore, by discharging the small to medium ambient gas between the sealing portions through the exhaust port, the pressure in the small chamber can be maintained at a pressure lower than the pressure 卩3 of the cooling zone. . 1〇 [Patent Document Π Japanese Patent Gazette Special Kaiping (4) Coffee
【專利文獻2】曰本專利公開公報特開平9_279253 【發明内容；J 【發明欲解決之課題】 然而，前述引用文獻1之氣體密封裝置，具有由氣體吸 15引至及其兩侧的氣體吹出室所組成之—體成形的槽體形 狀，使氣體吸引室變得為窄ρ益。因此，當由上游側的氣體 吹出室所吹出的氣體其中_部分，捲入鋼板的流動且流入 中間的氣體吸引室時，在此氣體吸引室中，氣體無法受到 充分的吸引而有、;隻漏至下游側的氣體吹出室之問題。 2〇 Θ述引用文獻2之環境氣體混合防止裝置中，由陶瓷纖 維外層等組成的密封部，係在按壓狀態下而與帶鋼的上下 面相接觸，因此帶鋼的邊緣形狀不佳時，密封部將受到切 削而有損傷之問題。 本發明係有鑑於前述習知問題點而創作完成者，課題 6 200815607 在於提供一種連續熱處理爐之密封裝置，其對於譬如前述 引用文獻1之氣體密封，可減少導入上游側之室内的密封氣 體捲入鋼板的流動’並經中間部而流入下游側之室中，又， 可防止密封氣體由中間部之上游側及下游側洩漏至中間 5 部。 【用以解決問題之手段】[Patent Document 2] Japanese Laid-Open Patent Publication No. Hei 9-279253 [Invention Summary] J [The object to be solved by the invention] However, the gas sealing device of the above-mentioned reference 1 has a gas blown from the gas suction 15 to both sides thereof. The shape of the body formed by the chamber makes the gas suction chamber narrow. Therefore, when the portion of the gas blown out from the gas blowing chamber on the upstream side is caught in the flow of the steel sheet and flows into the gas suction chamber in the middle, the gas cannot be sufficiently attracted in the gas suction chamber; Leakage to the gas blowing chamber on the downstream side. (2) In the environmental gas mixing preventing device of the reference 2, the sealing portion composed of the outer layer of the ceramic fiber or the like is in contact with the upper and lower faces of the steel strip in a pressed state, so that the edge shape of the steel strip is not good, and the sealing is performed. The part will be damaged by cutting. The present invention has been made in view of the above-mentioned problems, and the problem is to provide a sealing device for a continuous heat treatment furnace, which can reduce the sealing gas volume introduced into the room on the upstream side, for example, the gas seal of the above-mentioned reference 1. The flow into the steel sheet flows into the chamber on the downstream side through the intermediate portion, and further prevents the sealing gas from leaking to the middle portion from the upstream side and the downstream side of the intermediate portion. [Means to solve problems]
為解決前述問題，本發明係一種連續熱處理爐之密封 裝置，係於進行鋼板之第1熱處理程序的第丨室，與進行第2 熱處理程序的第2室之間設置中間室，且在前述中間室之上 10游側與下游側，分別設置具有供鋼板通過之開口部，且由 該開口部對鋼板吹出密封氣體之槽體，並由前述中間室排 出氣體者，其特徵在於設置有： a升降構件，係可沿前述各槽體升降，在開啟前述開口 部之開放位置，以及將前述開口部關閉至鋼板可通過程度 15之關閉位置之間移動者；及 又 、按壓構件，係當前述升降構件位在關閉位置時，將前 述升降構件壓向槽體，消除升降構件與槽體間之間隙者。 :續熱處理爐之密封裝置中’前述㈣構件係 2。面之棒狀構件組成，讓該棒狀構件在轴方向上移 ::前述錐形面接觸與在前述升降構件與前述槽體對 體上。為相反侧之面’藉此將前述升降構件按壓於前述槽 【發明之功效】 依本發明’由於設置有可沿各槽體升降，在開啟開 7 200815607 之問μ位置U及在鋼板通過時關_ 口部之關閉位置 置而读|的升卜構件，故可藉由讓升降構件定位於關閉位 ο開口部與鋼板間的空隙，可減少由槽體往第i室側 =密封氣斷__錢增室， 弟2室側。 田又，升降構件位於關閉位置時，因設置有將升降構 壓向槽體，>肖除升降構件與槽體間之空隙的按壓構件，故 :消除密封氣體由升降構件與槽體間的空隙洩漏至中間 〇 如前述，可減少密封氣體由第1室側進入第2室側，並 消除密封氣體由第1室側或第2室侧洩漏至中間室。 因此，可由中間室排出氣體，將中間室的壓力維持得 更低於第1室與第2室，故可有效防止第j室與第2室之環境 氣體混合。 15 又’可變換各室之氣體環境，調整鋼板之表面。 再者，由於各室之氣體環境可完全地分隔開，故安全 性提高，並可在各室進行急加熱與急冷卻。 圖式簡單說明 第1圖係適用本發明密封裝置之鋼板之連續熱處理爐 2〇 的剖面圖。 第2圖係第1圖之密封裝置的放大圖。 第3圖係第2圖之III —m線剖面圖。 第4圖係第2圖之IV —IV線剖面圖。 第5圖係升降構件的放大圖。 8 200815607 第6圖係按壓構件的放大圖。 【寶 】 較佳實施例之詳細說明 以下，依添附之圖式說明本發明之實施方式。 5 第1圖係顯示適用本發明密封裝置之鋼板的連續熱處 理爐。該連續熱處理爐係在鋼板s其行進方向的上游侧（第i 圖中左侧)設置第1室1，在下游側（第1圖中右側)設置第2室 2，且第1室1與第2室2之間設置有密封裝置3。第1室1係保 持在氮氣環境，第2室2是保持在由氫及氮組成的氣體環境 10中。經第1室1預熱之鋼板s，储由報子4,5而通過密封裝 置3，進而藉由親子6,7導向第2室2，並於該第2室2進行還 原加熱後’搬送至次一程序。 如第2圖所示，前述密封裝置3係由下述構件構成，即： 與第1室1及第2室2連接之中間室8;分別設置於該中間" I5之上游側及下游側的第丨槽體9a、第2槽體分別設置於 該第1槽體9 a之下游侧、及第2槽體9 b之上游侧的第丄升降構 件10a、第2升降構件10b;以及分別設置於該第岍降構件 l〇a之下游側、及第2升降構件嶋之上游側的第丨按壓構件 11a、弟2按壓構件lib。 20 如第2圖所示，中間室8係由與第1室！及第2室2連接之 爐體而形成。中間室8形成有排氣口12,排氣管13連接於該 排氣口 12。 第1槽體9a係插入爐體以分隔開第丨室〗與中間室8。如 第3圖所示，第1槽體9a形成有連通第1室1與中間室8之細+ 9 200815607 開口部14，且鋼板S經由該開口部14而加以通過。開口部14 之上緣與下緣係如第2圖所示，形成有由第丨槽體9a内部傾 斜朝向第1室1侧之氣體吹出口 15。於第丨槽體9&中，第i室j 内之環境氣體係藉由未圖示之循環葉片，經氣體導入管16 5而作為密封氣體加以導入，且該密封氣體係由氣體吹出口 15而對通過開口部14之鋼板s吹出。第2槽體9b係與第丨槽體 9a相同地構成。 第1升降構件10a係配置於前述第1槽體％之中間室8 側。如第4圖、第5圖所示，第丨升降構件1〇a具有與前述第工 10槽體如之開口部14大致相等或較其更大之寬幅，且由沿著 前述第1槽體9a而升降之上構件17與下構件18構成。上構件 17之上端，安裝有三根桿體19，各桿體19係貫通爐體而朝 外部突出，且分別連接於氣缸2〇。同樣地，下構件18之下 端，安裝有三根桿體21，各桿體21係貫通爐體而朝外部突 15出，且勿別連接於氣缸22。再者，藉由讓氣缸20,22動作， 上構件17與下構件18係可在開啟前述第丨槽體％之開口部 14的開放位置，以及在鋼板s通過時關閉前述開口部〗々之關 閉位置之間移動。第2升降構件i〇b係與第1升降構件1〇a相 同地構成。 20 第1按壓構件Ha係配置於前述第1升降構件〗〇a之中間 至8側，其於第1升降構件10a之上構件17上，係設置有二 個，於下構件18上，亦設置有二個。如第6圖所示，各第i 按壓構件11a係由於前端具錐形面23，且後端形成有公螺紋 24之圓棒狀的軸體25所構成。軸體25係貫通爐體，經導管 10 200815607 26内而螺合於設置在導管26前端上之螺母27，且其前端安 裝有把手28。第1按壓構件Ha係藉由手動旋轉操作把手 28，而在軸方向上移動，並藉由讓其錐形面23接觸與在第1 升降構件l〇a與第1槽體％對向之面為相反側之面，而讓第1 5升降構件10a朝圖中箭頭p方向而壓向第1槽體9a。第1按壓 構件11a亦可安裝電動泵來取代把手28，使其可自動地移 動。又，第1按壓構件11a之驅動機構並不限於螺栓，亦可 使用鎖固及小齒輪機構。第2按壓構件lib係與第1按壓構件 1 la相同地構成。 10 其次，說明由前述構造所組成之密封裝置3。 在進行連續熱處理爐之運轉前，為讓鋼板S插通密封裝 置3，首先，操作把手28而讓軸體25後退，藉此，第1按壓 構件11a、第2按壓構件lib之錐形面23，係與第1升降構件 10a、第2升降構件1 〇b分隔開來。又，讓氣缸20,22動作，使 15第1升降構件l〇a、第2升降構件10b移動至開口位置，並開 啟第1槽體9a與第2槽體9b之開口部14。 連續熱處理爐運轉時，讓氣缸20,22動作，使第1升降 構件10a、第2升降構件i〇b移動至關閉位置，並且將第1槽 體9a與第2槽體％之開口部14關閉至鋼板S可通過之程度。 2〇 又，藉由操作把手28而讓軸體25前進，以讓第1按壓構件 11a、第2按壓構件11|>之錐形面23，與第1升降構件1(^、第 2升降構件10b相接觸，使第1升降構件10a、第2升降構件10b 分別按壓於第1槽體9a、第2槽體9b。 再者，藉由未圖示之循環葉片，經氣體導入管16a將第 11 200815607 1室1内之環境氣體作為密封氣體而導人以槽體9a，且該密 =氣體由吹出口15向通關口部14之鋼板s而於第⑴侧 出又’經氣體導入管鳩而冑第2室2内之環境氣體作為 密封氣體而導入第2槽體9b，且該密封氣體係由氣體吹出口 5 15，向通過開口部14之鋼板s而於第2室2側吹出。 此時，藉由位於關閉位置之策丨升降構件1〇a、第2升降 構件10b，第丨槽體9a之開口部14與鋼板s間的間隙縮小，故 可減少由第1槽體9a而於第1室1側吹出的密封氣體捲入鋼 板S的流動中並進入中間室8，進而，減少流向第2室2侧。 ° 又，藉由第1按壓構件11a、第2按壓構件lib，第1升降 構件10a、第2升降構件i〇b係按壓於第丨槽體9a、第2槽體外 上’故岔封氣體變得不會由第1升降構件l〇a，l〇b與第1槽體 9a，9b間的間隙洩漏至中間室8。縱或密封氣體洩漏至中間室 8,進入中間室8之氣體係會由排氣口 12經排氣管13而排出。 5 藉由中間室8排出氣體，將第1室1之壓力設為pi、中間 室8之壓力設為P2、第2室2之壓力設為P3時，可維持P2<P1 <P3。藉此，可有效防止第1室1與第2室2之環境氣體混合。 【圖式簡單說明3 第1圖係適用本發明密封裝置之鋼板之連續熱處理爐 20 的剖面圖。 第2圖係第1圖之密封裝置的放大圖。 第3圖係第2圖之III —ΠΙ線剖面圖。 第4圖係第2圖之IV —IV線剖面圖。 第5圖係升降構件的放大圖。 12 200815607 第6圖係按壓構件的放大圖。 【主要元件符號說明】In order to solve the above problems, the present invention is a sealing device for a continuous heat treatment furnace, which is provided between a second chamber for performing the first heat treatment process of the steel sheet, and an intermediate chamber between the second chamber for performing the second heat treatment process, and in the middle of the foregoing Each of the 10 upstream side and the downstream side of the chamber is provided with an opening portion through which the steel sheet passes, and a groove body for blowing a sealing gas to the steel sheet by the opening portion, and a gas is discharged from the intermediate chamber, and is characterized in that: The lifting member is movable up and down along the respective groove bodies, and is moved between an open position at which the opening portion is opened and a closed position in which the opening portion is closed to a passable degree of the steel plate; and the pressing member is as described above. When the lifting member is in the closed position, the lifting member is pressed against the groove body to eliminate the gap between the lifting member and the groove. : In the sealing device of the heat treatment furnace, the aforementioned (four) component system 2 is used. The rod-like member of the face is configured to move the rod-like member in the axial direction: the aforementioned tapered surface contact is in contact with the aforementioned lifting member and the aforementioned groove body. The surface of the opposite side is used to press the lifting member to the aforementioned groove. [Effect of the invention] According to the invention, the opening position 7 200815607 is used to raise and lower the position U, and when the steel plate passes, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ Qian Zeng room, brother 2 room side. In addition, when the lifting member is in the closed position, the pressing member is provided to press the lifting mechanism against the groove body, and the gap between the lifting member and the groove body is removed, so that the sealing gas is removed from the lifting member and the groove body. When the gap leaks to the middle, as described above, the sealing gas can be prevented from entering the second chamber side from the first chamber side, and the sealing gas can be prevented from leaking from the first chamber side or the second chamber side to the intermediate chamber. Therefore, the gas can be exhausted from the intermediate chamber, and the pressure in the intermediate chamber can be maintained lower than that in the first chamber and the second chamber, so that the ambient gas in the j-th chamber and the second chamber can be effectively prevented from mixing. 15 Also, the gas environment of each chamber can be changed to adjust the surface of the steel plate. Furthermore, since the gas atmospheres of the respective chambers can be completely separated, the safety is improved, and rapid heating and rapid cooling can be performed in each chamber. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a continuous heat treatment furnace of a steel sheet to which the sealing device of the present invention is applied. Fig. 2 is an enlarged view of the sealing device of Fig. 1. Fig. 3 is a sectional view taken along line III-m of Fig. 2; Fig. 4 is a sectional view taken along line IV-IV of Fig. 2; Figure 5 is an enlarged view of the lifting member. 8 200815607 Figure 6 is an enlarged view of the pressing member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 5 Fig. 1 shows a continuous heat treatment furnace for a steel sheet to which the sealing device of the present invention is applied. In the continuous heat treatment furnace, the first chamber 1 is provided on the upstream side (the left side in the i-th view) of the steel sheet s in the traveling direction, and the second chamber 2 is provided on the downstream side (the right side in the first drawing), and the first chamber 1 is A sealing device 3 is provided between the second chambers 2. The first chamber 1 is maintained in a nitrogen atmosphere, and the second chamber 2 is maintained in a gaseous environment 10 composed of hydrogen and nitrogen. The steel sheet s preheated by the first chamber 1 is stored by the newspaper 4, 5 through the sealing device 3, and then guided to the second chamber 2 by the parent, 6, and then subjected to reduction heating in the second chamber 2 To the next procedure. As shown in Fig. 2, the sealing device 3 is composed of an intermediate chamber 8 connected to the first chamber 1 and the second chamber 2, and is disposed on the upstream side and the downstream side of the intermediate portion I5, respectively. The second trough body 9a and the second trough body are respectively disposed on the downstream side of the first tank body 9a and the second elevating member 10a and the second elevating member 10b on the upstream side of the second tank body 9b; The second pressing member 11a and the second pressing member 11b are provided on the downstream side of the first descending member 10a and the upstream side of the second elevating member. 20 As shown in Figure 2, the intermediate chamber 8 is connected to the first room! It is formed by the furnace body connected to the second chamber 2. The intermediate chamber 8 is formed with an exhaust port 12 to which the exhaust pipe 13 is connected. The first tank body 9a is inserted into the furnace body to separate the first chamber and the intermediate chamber 8. As shown in Fig. 3, the first groove body 9a is formed with a thin opening portion 9 that communicates with the first chamber 1 and the intermediate chamber 8, and the steel plate S passes through the opening portion 14. As shown in Fig. 2, the upper edge and the lower edge of the opening portion 14 are formed with a gas outlet port 15 which is inclined toward the first chamber 1 side by the inside of the second groove body 9a. In the second tank 9 & the ambient gas system in the i-th chamber j is introduced as a sealing gas through a gas introduction pipe 16 by a circulation vane (not shown), and the sealing gas system is supplied from the gas outlet 15 The steel sheet s that has passed through the opening 14 is blown. The second tank body 9b is configured in the same manner as the second tank body 9a. The first elevating member 10a is disposed on the intermediate chamber 8 side of the first trough body %. As shown in FIGS. 4 and 5, the second elevating member 1A has a width substantially equal to or larger than the opening portion 14 of the first working 10, and is along the first groove. The body 9a is configured to elevate and lower the upper member 17 and the lower member 18. At the upper end of the upper member 17, three rods 19 are attached, and each of the rods 19 projects through the furnace body and protrudes outward, and is connected to the cylinder 2, respectively. Similarly, three lower rods 21 are attached to the lower end of the lower member 18, and each of the rod bodies 21 penetrates the furnace body and protrudes outward, and is not connected to the cylinder 22. Further, by operating the cylinders 20, 22, the upper member 17 and the lower member 18 can open the opening position of the opening portion 14 of the second groove body %, and close the opening portion when the steel plate s passes. Move between closed positions. The second elevating member i〇b is configured in the same manner as the first elevating member 1A. 20 The first pressing member Ha is disposed on the middle to the 8th side of the first elevating member 〇a, and is provided on the upper member 17 of the first elevating member 10a, and is provided on the lower member 18. There are two. As shown in Fig. 6, each of the i-th pressing members 11a is constituted by a shaft body 25 having a tapered shape on the front end and a round bar shape in which a male thread 24 is formed at the rear end. The shaft body 25 is passed through the furnace body, and is screwed into the nut 27 provided on the front end of the duct 26 via the pipe 10 200815607 26, and the handle 28 is attached to the front end thereof. The first pressing member Ha is moved in the axial direction by manually rotating the handle 28, and the conical surface 23 is brought into contact with the first elevating member 10a and the first trough body. On the opposite side, the first lifting member 10a is pressed toward the first groove 9a in the direction of the arrow p in the figure. The first pressing member 11a may be provided with an electric pump instead of the handle 28 so that it can be automatically moved. Further, the driving mechanism of the first pressing member 11a is not limited to the bolt, and a locking and pinion mechanism may be used. The second pressing member lib is configured in the same manner as the first pressing member 1 la. 10 Next, the sealing device 3 composed of the aforementioned structure will be described. Before the operation of the continuous heat treatment furnace, in order to insert the steel sheet S into the sealing device 3, first, the handle 28 is operated to retract the shaft body 25, whereby the tapered surface 23 of the first pressing member 11a and the second pressing member lib The first elevating member 10a and the second elevating member 1b are separated from each other. Further, the cylinders 20, 22 are operated to move the first lifting member 10a and the second lifting member 10b to the opening position, and the opening portions 14 of the first groove 9a and the second groove 9b are opened. When the continuous heat treatment furnace is operated, the cylinders 20 and 22 are operated to move the first elevating member 10a and the second elevating member i〇b to the closed position, and the opening portions 14 of the first tank body 9a and the second tank body % are closed. To the extent that the steel sheet S can pass. In addition, by operating the handle 28, the shaft body 25 is advanced so that the tapered surface 23 of the first pressing member 11a and the second pressing member 11|> and the first lifting member 1 (^, the second lifting and lowering) When the member 10b is in contact with each other, the first elevating member 10a and the second elevating member 10b are pressed against the first tank body 9a and the second tank body 9b. Further, the circulation vane (not shown) is passed through the gas introduction pipe 16a. In the 11th 200815607, the ambient gas in the first chamber 1 is used as a sealing gas to guide the tank 9a, and the dense gas is discharged from the air outlet 15 to the steel plate s of the gate portion 14 and on the (1) side. The ambient gas in the second chamber 2 is introduced into the second tank body 9b as a sealing gas, and the sealing gas system is blown out from the steel sheet s passing through the opening 14 to the second chamber 2 side by the gas outlet port 515. At this time, the gap between the opening 14 of the second groove body 9a and the steel sheet s is reduced by the lifting member 1a and the second lifting member 10b at the closed position, so that the first groove 9a can be reduced. On the other hand, the sealing gas blown out on the first chamber 1 side is caught in the flow of the steel sheet S and enters the intermediate chamber 8, and further reduces the flow to the second chamber 2 side. By the first pressing member 11a and the second pressing member 11b, the first elevating member 10a and the second elevating member i〇b are pressed against the second groove body 9a and the second groove body, so that the sealing gas does not become sealed. The gap between the first lifting members 10a, 10b and the first tanks 9a, 9b leaks into the intermediate chamber 8. The longitudinal or sealing gas leaks into the intermediate chamber 8, and the gas system entering the intermediate chamber 8 is discharged. The gas port 12 is discharged through the exhaust pipe 13. 5 The gas is discharged from the intermediate chamber 8, and the pressure of the first chamber 1 is pi, the pressure of the intermediate chamber 8 is P2, and the pressure of the second chamber 2 is P3. P2 < P1 < P3 can be maintained. Thereby, the ambient gas of the first chamber 1 and the second chamber 2 can be effectively prevented from mixing. [Fig. 3 is a continuous heat treatment of a steel sheet to which the sealing device of the present invention is applied. Fig. 2 is an enlarged view of the sealing device of Fig. 1. Fig. 3 is a sectional view taken along line III of Fig. 2, and Fig. 4 is a sectional view taken along line IV-IV of Fig. 2. Fig. 5 is an enlarged view of the lifting member. 12 200815607 Fig. 6 is an enlarged view of the pressing member. [Description of main component symbols]
1...第1室 16，16a,16b.··氣體導入管 2...第2室 17…上構件 3...密封裝置 18…下構件 4,5···輥子 19...桿體 6,7···輥子 20···氣缸 8..冲間室 21…桿體 9^..第1槽體 22···氣缸 %…第2槽體 23...錐形面 10a…第1升降構件 24...公螺紋 10b...第2升降構件 25...軸體 11a…第1按壓構件 26...導管 lib··.第2按壓構件 27…螺母 12...排氣口 28…把手 13...排氣管 ?1，?2，?3...壓力 14...開口部 S…鋼板 15…氣體吹出口 131...1st room 16,16a,16b.·Gas introduction pipe 2...Second room 17...Upper member 3...Sealing device 18... Lower member 4,5···roller 19... Rod 6,6···Roller 20···Cylinder 8. Crushing chamber 21...Rod body 9^..1st trough 22···Cylinder %...2nd trough 23...conical surface 10a...first lifting member 24: male thread 10b...second lifting member 25...shaft 11a...first pressing member 26...duct lib·.second pressing member 27...nut 12. .. Exhaust port 28...handle 13...exhaust pipe?1,?2,?3...pressure 14...opening S...steel plate 15...gas outlet 13