CN102628518A - 紧急切断安全装置 - Google Patents
紧急切断安全装置 Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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- G05D16/00—Control of fluid pressure
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- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0675—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever
- G05D16/0683—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane
- G05D16/0691—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane characterised by the loading mechanisms of the membrane
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- Y10T137/7726—Responsive to change in rate of flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7723—Safety cut-off requiring reset
- Y10T137/7726—Responsive to change in rate of flow
- Y10T137/7727—Excessive flow cut-off
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7723—Safety cut-off requiring reset
- Y10T137/773—Fluid released trip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
- Y10T137/8225—Position or extent of motion indicator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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Abstract
一种用于气体分配系统的紧急切断安全装置,包括阀体(12)、连接到该阀体的上外壳(14),该上外壳容纳两个弹簧(30,32)。所述两个弹簧同轴设置并且被铸管分隔。进一步,所述两个弹簧被连接到暴露于气体系统压力的可动隔膜(42)。卡环法兰(16)也被连接到所述阀体,所述卡环法兰被用于将所述安全装置固定到所述气体分配系统中的主调节器。所述阀体还包括安装在所述阀体中的凸轮(62)。限位开关(18)被直接连接到所述凸轮,使得所述限位开关直接响应所述隔膜的移动而移动。另外,复位销(66)从所述阀体延伸并且与所述凸轮相互作用,使得通过移动所述复位销所述凸轮可以从关闭位置复位到打开位置。
Description
本申请是申请日为2008年4月18日、申请号为200880012543.8且发明名称为“紧急切断安全装置”的发明专利申请的分案申请。
相关申请
本申请要求于2007年4月20日提交的美国临时申请60/925,599的权益,其全部内容通过引用并入本文。本申请要求于2007年4月20日提交的法国专利申请FR0754624的外国优先权权益,其全部内容通过引用并入本文。
技术领域
本公开内容大体上涉及用于气体分配系统的安全装置,更具体而言,涉及紧急切断(slam-shut)型安全阀。
背景技术
气体分配系统,特别是天然气分配系统,通常将气体沿一系列管道并通过一系列阀门从生产者输送到消费者。各个气体分配系统可以包括控制分配系统中的气体压力的一个或多个调节阀。通常,气体在高压下被输送通过系统。然而,气体压力在最终分配到消费者之前必须被减小。该减压通常在位于本地网络中的减压站完成。
通常,所述减压站包括一个或多个调压阀以及在调压阀失效时切断气流的某种安全装置。最普遍地,紧急切断安全阀被用于上述目的。例如,通过引用并入于此的美国专利4,134,421公开了一种在管路中提供过压保护的紧急切断安全阀。该紧急切断安全阀被大致设置在调压阀的上游,使得在调压阀失效的情况下该紧急切断阀可防止气体到达调压阀。紧急切断安全阀针对最大和最小压力容许量监控调压阀下游的气体压力。如果下游压力超过最大或最小容许量的任何之一,紧急切断安全阀关闭,从而切断通向调压阀的气流并防止气体因调压阀失效而不受控制地泄漏。
发明内容
一种用于气体分配系统的紧急切断安全阀包括阀体、连接到所述阀体的上外壳,所述上外壳容纳两个弹簧。所述两个弹簧同轴设置并且被铸管分隔。所述两个弹簧被连接到一侧暴露于气体系统压力的可动隔膜。卡环法兰被连接到所述阀体,所述卡环法兰适于将所述安全装置固定到所述气体分配系统中的主调节器。所述阀体包括安装在该阀体内的凸轮。限位开关被直接连接到所述凸轮,使得所述限位开关直接响应所述隔膜的移动而移动。复位销从所述阀体延伸并与所述凸轮相互作用,使得通过移动所述复位销,所述凸轮可以从关闭位置复位到打开位置。
附图说明
本发明的目的、特征和优点在结合以下附图阅读说明书之后将变得明显,所述附图包括:
图1为根据本公开内容的教示构造的紧急切断安全装置的透视图;
图2为图1中所示的紧急切断安全装置的上外壳的剖切图;
图3A为设置在图1的紧急切断安全装置的上外壳和阀体之间的隔膜的剖视图;
图3B为低压结构的图3A的隔膜的剖视图;
图3C为高压结构的图3A的隔膜的剖视图;
图4为用于将图1的紧急切断安全阀固定到主调节阀的卡环法兰的透视图;
图5A为图1的紧急切断安全装置的阀体的前视剖切图,其特别突出显示位于复位位置的复位销;和
图5B为图1的紧急切断安全装置的阀体的前视剖切图,其特别突出显示位于再锁合位置的复位销。
具体实施方式
现在参见附图,图1例示出根据本公开内容的教示构造的紧急切断安全装置10。特别是,该紧急切断安全装置10被连接到气体分配系统中的主调节器(未示出)。紧急切断安全装置10包括阀体12、连接到该阀体的上外壳14、安装到阀体12的一侧的卡环法兰16、限位开关18、以及从阀体伸出的复位销20。紧急切断安全装置10通过紧固件22连接到主调节器(未示出)。同样地,上外壳14通过紧固件26连接到阀体12。紧固件22、26可以是螺栓、铆钉、螺钉、或者适于将一个部件连接到另一部件的可能的任何其它类型的紧固件。
上外壳14(图2)容纳过压弹簧30和欠压弹簧32。欠压弹簧32确定气体分配系统中的下限(最低)可容许气体压力。相似地,过压弹簧30确定气体分配系统中的上限(最高)可容许气体压力。过压和欠压弹簧30、32以大致同轴结构(即,两个弹簧的中心轴线重合设置)被设置在上外壳14内。然而,这些弹簧不必被同轴设置,这些弹簧可以轴向相互偏离。内铸管34将过压弹簧30与欠压弹簧32分隔。外铸管36围绕过压弹簧30并保护过压弹簧30和欠压弹簧32二者免受环境因素的影响。欠压弹簧32在一端被连接到隔膜板37,而过压弹簧在一端被连接到过压环41。过压环41可以被连接到隔膜板37。隔膜板37和过压环41均可以被连接到隔膜42,这将在下文更加详细地进行讨论。隔膜42在一侧暴露于系统压力,隔膜42的另一侧暴露于来自过压弹簧30和欠压弹簧32的弹簧力。隔膜42的一部分是可移动的,且根据沿轴线A的系统压力可移位到阀体12或上外壳14的内部。轴线A与过压弹簧30和欠压弹簧32的中心轴线基本平行或同轴。
在隔膜42的相对端,过压弹簧30和欠压弹簧32分别接触或抵靠过压调节盖44和欠压调节盖46。过压调节盖44和欠压调节盖46能够沿轴线A朝向和远离隔膜42移位。在一个实施例中,过压调节盖44和欠压调节盖46可以分别与外铸管36和内铸管34螺纹接合。特别是,过压盖44既可以与外铸管36的内表面也可以与内铸管34的外表面螺纹接合。欠压盖46可以与内铸管34的内表面螺纹接合。过压盖46和欠压盖44均可沿轴线A移动,以调节过压弹簧30和欠压弹簧32对隔膜板37的弹簧张力。调节盖44、46和隔膜板37之间的距离确定紧急切断安全装置10的过压和欠压设定点。与传统的紧急切断阀相比,过压弹簧30和欠压弹簧32的中心轴线被设置在隔膜42的相同侧。将过压弹簧30和欠压弹簧32均设置在隔膜42的相同侧便于从阀的外部对过压弹簧30和欠压弹簧32进行调节。此外,对过压弹簧30和欠压弹簧32的调节可以相互独立地进行。换句话说,使用者可以仅调节过压弹簧30,而不影响欠压弹簧32,或者可以仅调节欠压弹簧32,而不影响过压弹簧30。在过压和欠压弹簧被设置在隔膜的相对侧的传统的紧急切断阀中,对一个弹簧的调节影响另一个弹簧的张力,使得弹簧不能被相互独立地调节。而且,在至少一个实施例中,将过压弹簧30和欠压弹簧32同轴设置使得上外壳14紧凑,从而利于安装在空间狭小或有限的位置。
隔膜42(图3A、图3B、图3C)包括用于将上外壳14与阀体12密封的外O形环50。隔膜42还包括第一和第二同心回旋结构52a、52b。外平面区域51将O形环50与第一回旋结构52a分隔。中间平面区域53将第一回旋结构52a与第二回旋结构52b分隔,并且内平面区域55将第二回旋结构52b与中心开口54分隔。第一和第二回旋结构52a、52b允许单个隔膜42用于低压结构和高压结构二者。低压结构示于图3B中,高压结构示于图3C中。当将隔膜42连接到隔膜板37时,中心开口54可以接纳紧固件(例如螺栓)。这样,由于隔膜42适于高压结构和低压结构二者,因此减少了制造成本。另外,库存管理因仅需要储存一个隔膜而改善,并且由于减少了库存零部件的数量而能够实现较高的订购量。
低压结构包括低压隔膜板38,低压隔膜板38为刚性板,该板覆盖内侧回旋结构52b、内平面区域55和中间平面区域53(图3B),并允许外侧回旋结构52a和外平面区域51保持可动。同样地,高压结构包括高压隔膜板40,高压隔膜板40为刚性板,该板覆盖外侧回旋结构52a和中间平面区域53(图3C),并允许内侧回旋结构52b、内平面区域55和外平面区域51保持可动。采用这种方式,低压隔膜板38和高压隔膜板40确定隔膜42的哪部分保持可动以及隔膜的哪部分被防止移动。
紧急切断安全装置10通过卡环法兰16(图4)被连接到主调节器(未示出)。卡环法兰16包括用于接纳紧固件22的多个开口56。进一步,卡环法兰16沿一个边缘包括开口58。由于开口58可以变形和扩张以便于安装,所以开口58允许快速安装。卡环法兰16的对称性质允许紧急切断安全装置10在可能的任何方位被连接到主调节器(未示出),而不会导致气体和水的泄漏。
再次参见图1,阀体12包括被连接到可旋转凸轮62的限位开关18,凸轮62包括三个凸轮臂63a、63b、63c。凸轮62通过柱塞64在第一凸轮臂63a处连接到隔膜42。柱塞64包括向下延伸的柱塞臂65。柱塞臂65在第一凸轮臂63a上的与凸轮62的枢转轴线偏移的连接点67处连接到凸轮62。随着柱塞64响应大到足以克服过压弹簧30产生的力的过压状况而向上移动,凸轮62逆时针旋转(在本实施例中)。随着凸轮62旋转,连接到第一凸轮臂63a的闩锁(latch)被松开,并且紧急切断塞(未示出)移动到关闭位置,从而切断向主调节器的气体供应。响应欠压弹簧32的弹簧力克服系统气体压力的欠压状况,柱塞64向下移动,导致凸轮62顺时针方向旋转。在预定的旋转量后,连接到第一凸轮臂63a的闩锁被松开,并且紧急切断塞移动到关闭位置,从而切断向主调节器的气体供应。由于限位开关18通过第二凸轮臂62b直接联接到凸轮62,而第二凸轮臂62b通过凸轮62和柱塞64联接到隔膜42,因此限位开关18通过凸轮62的旋转检测隔膜42的移动。采用这种方式,限位开关18响应压力的细微变化而纵向移动,从而检测隔膜42的移动,即使复位销组件66损坏亦是如此。
阀体12还包括用于再锁合凸轮62的复位销组件66。复位销组件66包括复位杆68、再锁合塞70、行进指示器72(图5A、图5B)和复位套筒74。复位杆68响应再锁合塞70和凸轮62的第三凸轮臂63c之间的相互作用而能够在复位套筒74中滑动。随着凸轮62响应隔膜42的移动而旋转,第三凸轮臂63c接触再锁合塞70的第一肩部71a,并驱使再锁合塞70向外(向图1、图5A和图5B的左侧)。这接着使复位杆68向外移动,并且复位杆68接触行进指示器72(图5A和图5B)。行进指示器72可以由弹性、可变形材料形成。当复位杆68接触行进指示器72时,行进指示器72的中心部分向外变形(如图5A所示),从而产生凸轮62响应过压或欠压状况而发生旋转的可视且可感知的指示。行进指示器72通过在复位套筒74内形成密封而提供免受水或其它环境因素影响的保护,从而保护复位杆68。
一旦过/欠压状况被改正,复位销组件66可用于再锁合凸轮62。使用者可以将复位杆68的一端(设置在行进指示器中的一端)向阀体12的内部移位。这样,再锁合塞70也可被移位,且再锁合塞70的第二肩部71b可以接触第三凸轮臂63c,从而驱使凸轮62旋转至再锁合位置。
尽管本文出于例示本发明的目的示出了某些代表性实施例和细节,对本领域技术人员明显的是,在不背离本发明的范围的情况下,可以对本文所公开的方法和装置进行各种改变。
Claims (17)
1.一种用于气体分配系统的紧急切断安全阀,该紧急切断安全阀包括:
阀体;
安装到所述阀体上的上外壳;
设置在所述阀体和所述上外壳之间的隔膜,所述隔膜的至少一部分能够移位到所述阀体的内部和移位到所述上外壳的内部,所述隔膜具有暴露于气体系统压力的第一侧;
设置在所述上外壳内的第一弹簧和第二弹簧,所述第一弹簧和所述第二弹簧向所述隔膜的与所述气体系统压力相对的第二侧施加弹簧力;
连接到所述隔膜的所述第一侧的柱塞;
能旋转地安装在所述阀体内的凸轮,所述凸轮具有第一臂、第二臂和第三臂,所述第一臂接触所述柱塞;
接合所述第一臂的闩锁,所述闩锁适于连接到紧急切断阀塞;
其中所述柱塞朝向或远离所述凸轮的移动使所述凸轮旋转并使所述闩锁松开。
2.根据权利要求1所述的紧急切断安全阀,其中所述第三凸轮臂适于接触复位销,所述复位销能移动进出所述阀体。
3.根据权利要求2所述的紧急切断安全阀,其中所述复位销在一端包括复位塞,所述复位塞包括适于接触所述第三凸轮臂的第一肩部。
4.根据权利要求3所述的紧急切断安全阀,其中行进指示器被安装在所述复位销的第二端,所述行进指示器能够随所述复位销从指示所述闩锁被松开的延伸位置移动到指示所述闩锁被接合的缩回位置。
5.根据权利要求4所述的紧急切断安全阀,其中所述行进指示器由弹性材料形成。
6.根据权利要求1所述的紧急切断安全阀,其中所述第二凸轮臂适于接触限位开关,所述限位开关响应所述凸轮的旋转而纵向移动。
7.根据权利要求6所述的紧急切断安全阀,其中所述限位开关直接联接到所述第二凸轮臂。
8.根据权利要求7所述的紧急切断安全阀,其中所述限位开关通过所述凸轮的旋转检测所述隔膜的移动。
9.根据权利要求1所述的紧急切断安全阀,其中所述柱塞包括延伸远离所述隔膜的柱塞臂,所述柱塞臂连接到所述第一凸轮臂。
10.根据权利要求9所述的紧急切断安全阀,其中所述第一凸轮臂包括闩锁。
11.根据权利要求1所述的紧急切断安全阀,包括安装在所述阀体外侧的卡环法兰,所述卡环法兰适于将所述紧急切断安全阀固定到一控制阀,所述卡环法兰沿一个边缘包括开口。
12.根据权利要求11所述的紧急切断安全阀,其中所述开口允许所述卡环法兰在安装期间变形。
13.根据权利要求1所述的紧急切断安全阀,包括设置在所述第一弹簧的与所述隔膜相对的一端的第一调节盖。
14.根据权利要求13所述的紧急切断安全阀,其中所述第一调节盖被螺纹固定到所述上外壳,并且所述第一调节盖能够沿所述第一弹簧的轴线移位,所述第一调节盖的移位改变由所述第一弹簧施加在所述隔膜上的弹簧力的大小。
15.根据权利要求13所述的紧急切断安全阀,包括设置在所述第二弹簧的与所述隔膜相对的一端的第二调节盖。
16.根据权利要求15所述的紧急切断安全阀,其中所述第二调节盖被螺纹固定到所述上外壳,并且所述第二调节盖能够沿所述第二弹簧的轴线移位,所述第二调节盖的移位改变由所述第二弹簧施加在所述隔膜上的弹簧力的大小。
17.根据权利要求1所述的紧急切断安全阀,其中所述第一弹簧和所述第二弹簧的纵向轴线同轴设置。
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US20120273066A1 (en) | 2012-11-01 |
CA2842828C (en) | 2017-07-11 |
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US8794260B2 (en) | 2014-08-05 |
JP5452470B2 (ja) | 2014-03-26 |
US8225812B2 (en) | 2012-07-24 |
CA2683018C (en) | 2014-06-03 |
FR2915293B1 (fr) | 2009-07-10 |
EP2137441B1 (en) | 2013-04-03 |
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