CN1105286C - 金属带速冷炉的安全系统 - Google Patents
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Abstract
速冷炉,有一个安全装置,使它在膨胀接头的波纹发生断裂时或膨胀接头发生泄漏时,能够防止空气侵入到冷却气体的再循环回路内或冷却气体的泄漏到周围环境中,该装置有一个柔韧而对冷却气体不渗透的薄膜设置在再循环管道的每一个膨胀接头的周围,还设有一个装置,可用来立即停止冷却气体在再循环回路中的流动。
Description
技术领域
本发明涉及对带状材料特别是金属带用的速冷炉作出的改进。这种炉子可专门成为工场的一部分用来进行处理作业例如对带状金属制品进行热处理,尤其是镀锌、退火、制造白铁皮等。
背景技术
本发明更具体地涉及这种速冷炉的安全系统。
已知有这样的打算用来进行金属带连续热处理的工场(EP-A-0,795,616),在该工场内要被处理的带移动通过的炉子具有多个热处理段,具体如加热段、保温段、退火段、冷却段等。在该专利中,目前的所有人曾推荐采用加热的及/或冷却的封闭腔或室,室内具有氢基气体混合物构成的氛围,其氢含量大于为了增加冷却率通常允许采用的值。这样,按照这种现有技术,气体混合物特别是氮/氢气体混合物中的氢含量大于15%并可达到50%,即大于这种气体的爆炸性极限值,可被用作冷却封闭腔内的氛围。
在上述工场的冷却封闭腔内,重新循环的氛围气体在被冷却后,特别是借助于气/水热交换器而被冷却后,被吹到连续移动的金属带上,由于氛围气体的组成,特别是其高氢含量,能够得到约为100℃每秒极快的冷却速率。工场因此具有管道回路以便用来使N2、H2氛围气体再循环,并设有一台或多台风扇以便使这冷却气体在再循环管道和气/水热交换器内循环。
由于在快速冷却中使用的氛围气体具有极高的氢含量,必须非常小心以资确保工场的安全,的确,氛围气体的任何泄漏到周围环境内,那怕很小,都是不能容许的,同样也不容许空气侵入到再循环管道内。
发明内容
本发明旨在为这个安全问题提供方案,更具体点说,在本情况下可能会发生下列现象。所有的冷却气体循环管道都设有膨胀接头使该管道能膨胀。在膨胀接头的波纹发生断裂时或膨胀接头发生泄漏时,绝对有必要防止空气即其中的氧气侵入到冷却气体再循环管道内或者这个冷却气体有任何泄漏到周围环境内。
本发明解决了上述问题,办法是用柔韧而对冷却气体不渗透的薄膜包围在再循环管道的每一个膨胀接头的周围,另外还设有一个检测膨胀接头波纹断裂的装置,这个装置可立即中断冷却气体在再循环回路中的流动。
按照本发明的一个实施例,所说柔韧而对冷却气体不渗透的薄膜可被制成纺织薄膜的形式,例如由玻璃纤维增强的硅树脂制成的薄膜。
按照本发明,用来检测膨胀接头波纹断裂或膨胀接头泄漏的装置是这样完成的,利用增压的惰性气体,最好为氮,使它在膨胀接头与包围膨胀接头的柔韧而不渗透的薄膜之间的空间内流动,另外还设有装置可以检测在冷却气体通过膨胀接头泄出时这个惰性气体的压力发生的些微变化,从而停止所说冷却气体在再循环管道内的流动。
按照本发明的一个实施例,每一膨胀接头可设有一个金属壳体,其形式为一圆环包围着所说膨胀接头的波纹。这个壳体设有一个被所说柔韧而不渗透的薄膜封闭的圆孔,并有惰性气体用的进口和出口,惰性气体在压力下被引入到所说壳体之壁和膨胀接头之间。所说用来检测所说惰性气体压力变化的装置被设置在所说壳体上。
按照本发明,用来立即停止冷却气体在再循环管道内流动的装置可以采用这样一种型式,这种型式曾在与本申请在同一日立案的、由同一所有人呈报的、题为“金属带速冷炉的改进”的专利申请中说明,包括一个设置在速冷气体的流动区域内的、在热交换器上游的定位器系统,和一个具有极短响应时间即少于5秒钟的促动器系统,该系统控制着所说定位器系统,因此能在所说检测装置的控制下关闭所说流动区域。
本发明的其他一些特点和优点可从下面结合附图对没有任何限制性的实施例所作的说明中获悉。在附图中:
附图说明
图1为一透视图示出设有用来吹入并再循环氛围气体的管道的速冷炉的一个实施例,本发明可在这种炉子上应用;
图2为本发明的安全装置的轴向剖面的略图;
图3为设有本发明的安全装置的膨胀接头的平面图;
图4为图3中细部A的剖视图。
具体实施方式
参阅图1,其中示出可应用本发明的速冷炉的总体视图。这个速冷炉或室一般可成为一个拥有多个站可用来处理带状材料的工场的一部分,这个工场例如可能属于上述EP-0,795,616所说明的那种型式。金属带12连续地移动通过炉子,这带一般是从其他处理的封闭腔来的,例如热处理、保温处理、退火处理等。
在带12上连续喷射N2/H2的氛围气流便可使该带快速冷却,该氛围气体如上所述,氢含量甚高,至少大于15%,并可达到50%。这个氛围气体由管道16供给,通过喷嘴14喷射在带12的侧面上,并用在速冷室内与带12的平面平行的管道18予以回收。该氛围气体用电动机22驱动的风扇20使它循环,通过汇流管24吹入,供应给管道16,然后通过由管道18供应的汇流管26、26′予以回收。
按常见的方式,该工场还设有最好为气/水式的热交换器28、28′,它们分别被设置在封闭腔32、32′内,氛围气体回收管道26、26′在其内通过,以便使这氛围气体在流动通过速冷室10以后而在被风扇20回收并通过管道24和16吹入之前先被冷却。按照一种也是常见的构造,在各管道16、18、24、26、26′上都设有形式为一系列波纹的膨胀接头30以便使所有管道都能膨胀。
如上所述,本发明的目的是要在膨胀接头30的波纹发生断裂时提高用来使速冷气体再循环的回路及装有速冷炉的工场安全性,检测并防止空气也就是防止氧气有那怕是些微的数量侵入到回路内,因为在该回路内流动着氛围气体(速冷气体),而该气体是由氮/氢混合物组成的,其中氢含量可高达50%,另外也要防止这个氛围气体的任何些微的泄漏到周围环境内。
现在参阅图2到4,其中示出的按照本发明的装置对上述问题提出了解决方案。
按照本发明,在每一膨胀接头30的周围都设有一张柔韧而对冷却气体不渗透的薄膜,这样在用来循环冷却气体的各个管道上的每一个膨胀接头30的波纹的周围便都形成一个封闭腔36。在图2到4中,箭头F指示冷却气体的流动方向。
按照本发明装置的一个特征,一个增压的惰性气体流,特别是氮气,被保持在这个封闭腔36内,如图2概略地所示。在膨胀接头发生泄漏例如当其波纹断裂时,在封闭腔内惰性气体的压力便会变化,而本发明在所说封闭腔36上还设有一个检测器38,能对这个压力变化起反应,从而停止冷却气体在回路的管道16、18、26、26′、24内进行再循环,这些管道在图1中示出。
按照本发明,用来使冷却气体的再循环立即停止的装置最好采用这样一种型式,这种型式曾在由本申请的所有人呈报的、与本发明同时立案的、题为“金属带速冷炉的改进”的专利申请中说明。所说装置包括一个设置在冷却气体流动区内而在热交换器上游的定位器系统,和多个具有极短响应时间即少于五秒钟的促动器,该促动器控制着所说定位器系统,因此能在检测器38的控制下关闭所说流动区域。
图3和4示出按照本发明的装置的一个实用的实施例。该两图示出膨胀接头的波纹被形式为圆环的金属壳体40包围着,该金属壳体最好由钢制成,具有突缘系统42以便用来固定薄膜34。薄膜最好为一纺织薄膜,例如可由玻璃纤维增强的硅树脂制成,硅树脂提供气密性,而玻璃纤维使薄膜具有所需的机械强度。这个壳体设有流到封闭腔36内来的增压惰性气体的一个进口44和一个出口46。上述检测系统38也被定位在所说壳体上。
壳体40可被制成容易拿掉的形式。这样在冷却气体发生泄漏时便能在有缺陷的膨胀接头上加工以便予以修理或更换。
从上述说明可知能以有效果且有效率的方式提高采用具有高氢含量的冷却气体的速冷炉的安全性,办法是检测并防止任何空气(亦即氧气)在低压下侵入到冷却气体再循环的回路内或冷却气体的任何泄漏到周围环境内。
当然还应说明本发明并不受所说明的实施例的限制而是应包括所有其变型,只要那些变型是在所附权利要求限定的范围以内。
Claims (6)
1.一种金属带速冷炉的安全系统,其可成为具有各种处理站特别是带状制品热处理站的工场一部分,金属带(12)连续移动通过该炉,有一股氮/氢混合物的氛围气体的射流喷射在该带上而得到快速冷却,混合物中氢含量大于15%,最好接近50%,氛围气体用再循环管道(16、18、26、26′、24)的回路使它再循环,各管道上都设有形式为一系列波纹的膨胀接头(30)使所有管道都能膨胀,设有至少一台风扇(20)和至少一个气/水交换器(28、28′),这炉的特征是,
它有一个安全装置,使它在膨胀接头(30)的波纹发生断裂时或膨胀接头发生泄漏时,能够防止空气侵入到冷却气体的再循环回路内或冷却气体的泄漏到周围环境中,该装置有一个柔韧而对冷却气体不渗透的薄膜(34)设置在再循环管道的每一个膨胀接头(30)的周围,还设有一个装置(38),可用来立即停止冷却气体在再循环回路中的流动。
2.按照权利要求1的金属带速冷炉的安全系统,其特征为,用来检测膨胀接头(30)波纹的断裂或膨胀接头的泄漏的装置是这样完成的,将增压的惰性气体流,最好为氮气,通入处于膨胀接头和包围该膨胀接头的柔韧而不渗透的薄膜(34)之间的封闭腔(36)内,在封闭腔上还设有装置(38)用来检测由于冷却气体通过膨胀接头泄出而可能引起的惰性气体流率的增加,以便停止所说气体在再循环管道内的流动。
3.按照权利要求1和2的金属带速冷炉的安全系统,其特征为,每一膨胀接头(30)设有一个最好由钢制成、形式为一圆环的金属壳体(40),包围着所说膨胀接头的波纹,这个壳体设有一个圆孔被所说柔韧而不渗透的薄膜(34)封闭,并有惰性气体用的一个进口(44)和一个出口(46),惰性气体在压力下被引入到所说壳体壁与膨胀接头之间,所说用来检测所说惰性气体流率有无增加的装置(38)被放置在所说壳体上。
4.按照权利要求2的金属带速冷炉的安全系统,其特征为,使冷却气体在速冷气体再循环管道(16、18、24、26、26′)内的流动立即停止的装置具有一个调节器系统,设置在热交换器(28、28′)上游的冷却气体的流动区内,还有一个具有极短响应时间即少于5秒钟的促动器系统,该系统控制着所说调节器系统,以便在检测器(38)的控制下使所说流动区关闭。
5.按照权利要求1的金属带速冷炉的安全系统,其特征为,所说薄膜为一纺织薄膜。
6.按照权利要求5的金属带速冷炉的安全系统,其特征为,所说纺织薄膜(34)是由玻璃纤维增强的硅树脂制成的。
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Application Number | Priority Date | Filing Date | Title |
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FR9712907A FR2769696B1 (fr) | 1997-10-15 | 1997-10-15 | Systeme de securite pour fours a refroidissement rapide de bandes metalliques |
FR9712907 | 1997-10-15 |
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CN1216348A CN1216348A (zh) | 1999-05-12 |
CN1105286C true CN1105286C (zh) | 2003-04-09 |
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US (1) | US6126891A (zh) |
EP (1) | EP0913658B2 (zh) |
JP (1) | JP3274840B2 (zh) |
KR (1) | KR100519183B1 (zh) |
CN (1) | CN1105286C (zh) |
AT (1) | ATE214474T1 (zh) |
DE (2) | DE913658T1 (zh) |
ES (1) | ES2131494T5 (zh) |
FR (1) | FR2769696B1 (zh) |
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FR2809418B1 (fr) * | 2000-05-25 | 2003-05-16 | Stein Heurtey | Procede de mise en securisation d'une enceinte de traitement thermique fonctionnant sous atmosphere controlee |
KR101406513B1 (ko) * | 2011-11-15 | 2014-06-13 | 주식회사 포스코 | 우수한 표면 외관을 갖는 도금강판의 제조방법 |
FR3014447B1 (fr) * | 2013-12-05 | 2016-02-05 | Fives Stein | Procede et installation de traitement thermique en continu d'une bande d'acier |
CN117989861B (zh) * | 2024-04-07 | 2024-06-07 | 广东世创金属科技股份有限公司 | 一种带抽废气装置的工业炉设备及安全控制方法 |
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BE668638A (zh) * | 1964-03-25 | 1965-12-16 | ||
US4452279A (en) * | 1982-02-16 | 1984-06-05 | Titeflex Corporation | Silicone/elastomer fiberglass sleeves |
IT1174829B (it) * | 1983-09-08 | 1987-07-01 | Italimpianti | Dispositivo per il raffreddamento e la ricircolazione del gas dell atmosfera protettiva esistente in camera di raffreddamento di forni diricottura continua di nastri d acciaio |
BR8504750A (pt) * | 1984-11-14 | 1986-07-22 | Nippon Steel Corp | Aparelho de revestimento de tira para um forno de recozimento continuo |
JPS61194119A (ja) * | 1985-02-21 | 1986-08-28 | Nippon Steel Corp | 連続焼鈍設備における鋼帯冷却方法 |
US4806401A (en) * | 1986-03-24 | 1989-02-21 | The Boeing Company | Duplex cured elastomer hoses and method of manufacture |
FR2688802B1 (fr) * | 1992-03-19 | 1994-09-30 | Stein Heurtey | Procede de traitement thermique de bandes metalliques. |
DE4232195C1 (zh) * | 1992-09-25 | 1993-06-24 | Man Nutzfahrzeuge Ag, 8000 Muenchen, De | |
DE19525176A1 (de) * | 1995-07-11 | 1997-01-16 | Brugg Rohrsysteme Gmbh | Verfahren zur Überwachung einer Rohrleitung |
FR2746112B1 (fr) * | 1996-03-13 | 1998-06-05 | Procede de traitement thermique en continu de bandes metalliques dans des atmospheres de nature differente |
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1998
- 1998-10-07 ES ES98402492T patent/ES2131494T5/es not_active Expired - Lifetime
- 1998-10-07 DE DE1998402492 patent/DE913658T1/de active Pending
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Also Published As
Publication number | Publication date |
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ATE214474T1 (de) | 2002-03-15 |
FR2769696B1 (fr) | 1999-12-31 |
DE913658T1 (de) | 1999-10-21 |
DE69804185T3 (de) | 2005-09-29 |
JP3274840B2 (ja) | 2002-04-15 |
ES2131494T5 (es) | 2005-07-16 |
ES2131494T3 (es) | 2002-08-16 |
CN1216348A (zh) | 1999-05-12 |
FR2769696A1 (fr) | 1999-04-16 |
ES2131494T1 (es) | 1999-08-01 |
US6126891A (en) | 2000-10-03 |
KR100519183B1 (ko) | 2005-12-29 |
KR19990037036A (ko) | 1999-05-25 |
EP0913658A1 (fr) | 1999-05-06 |
DE69804185D1 (de) | 2002-04-18 |
EP0913658B2 (fr) | 2005-04-06 |
DE69804185T2 (de) | 2002-11-28 |
JPH11193421A (ja) | 1999-07-21 |
EP0913658B1 (fr) | 2002-03-13 |
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