WO1998058197A1 - Dispositif d'etancheite metallique a plasticite flexible - Google Patents

Dispositif d'etancheite metallique a plasticite flexible Download PDF

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Publication number
WO1998058197A1
WO1998058197A1 PCT/CN1998/000098 CN9800098W WO9858197A1 WO 1998058197 A1 WO1998058197 A1 WO 1998058197A1 CN 9800098 W CN9800098 W CN 9800098W WO 9858197 A1 WO9858197 A1 WO 9858197A1
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Prior art keywords
sealing element
passive
sealing
active
processed
Prior art date
Application number
PCT/CN1998/000098
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English (en)
French (fr)
Inventor
Yuping Jiao
Original Assignee
Yuping Jiao
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yuping Jiao filed Critical Yuping Jiao
Priority to AU77559/98A priority Critical patent/AU7755998A/en
Publication of WO1998058197A1 publication Critical patent/WO1998058197A1/zh

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Classifications

    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0881—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing the sealing effect being obtained by plastic deformation of the packing
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape

Definitions

  • the present invention relates to general engineering sealing, and in particular, to provide an elastoplastic metal sealing device used in a fluid pipeline system.
  • sealing devices used in fluid pipeline systems according to the materials used for their sealing surfaces.
  • One is to use non-metallic materials to process the sealing elements to achieve non-metal and non-metal or non-metal and metal sealing.
  • This type of sealing device has poor mechanical strength and performance stability due to non-metallic sealing elements. Under the influence of the temperature, pressure, chemical composition, and flow shock of the fluid medium, it is easy to cause damage to non-metallic sealing elements. 3 ⁇ 4 Seal is invalid.
  • the other is to use metal materials to process sealing elements to achieve metal-to-metal sealing.
  • This type of sealing device can be divided into three types according to the structure of the sealing surface and the way of forming it. The first is a machined sealing surface sealing device.
  • the sealing element is processed in advance, and the processing accuracy of the sealing surface and the assembly accuracy of the sealing element are high. Therefore, the processing cycle is long and the production cost is high.
  • the second is a mandatory sealing device.
  • This sealing device applies pressure to the sealing gasket through the sealing element, forcibly plastically deforms the sealing gasket, fills the micro gap, and realizes sealing.
  • the medium pressure always tends to reduce the specific pressure of the pre-tightening seal, which reduces the sealing performance.
  • the third is a self-tightening seal.
  • the sealing surface is also processed in advance. The difference is that through the complicated mechanism, the medium pressure always tends to increase the pre-tightening sealing specific pressure and increase the sealing performance.
  • the task of the present invention is to provide an elastoplastic metal sealing device with a simple structure and low cost, which can be used in a wide range of applications, has low requirements for processing accuracy, and has good sealing performance.
  • the elastoplastic metal sealing device of the present invention is composed of an active sealing element and a passive sealing element. It is characterized in that: the active sealing element has the same shape and partial performance as the working part of the press-forming forming die, and the passive sealing element has the shape and performance of the active sealing element being press-formed.
  • the active sealing element applies pressure to the passive sealing element, after the passive sealing element is forced to undergo elastoplastic deformation, A sealing surface with a perfectly matched shape is generated between them, and a slight interference fit effect can be achieved to achieve sealing.
  • the sealing between the passive sealing element and the other end can be performed according to conventional techniques.
  • the device uses pressure forming technology to achieve metal seals, it has a wide range of applications; the elastoplastic deformation of passive sealing elements enables automatic alignment and automatic repair, and requires low processing accuracy; the elastoplastic deformation of passive sealing elements, The sealing surface is completely matched and there is a slight interference fit, and the sealing performance is good. Moreover, due to the technical requirements of elastoplastic deformation of the passive sealing element, self-tight sealing can be conveniently realized.
  • Both the active sealing element and the passive sealing element in the above-mentioned sealing device may be made of an elastoplastic metal.
  • FIG. 1 is a schematic diagram of an elastoplastic metal sealing device of the present invention
  • FIG. 2 is a schematic diagram when the present invention is applied to an external seal of a fluid pipeline system
  • FIG. 3 is a schematic diagram when the present invention is applied to a seal in a fluid pipeline system
  • the elastoplastic metal sealing device described in FIG. 1 includes an active sealing element (1) and a passive sealing element (2). Under the action of the external force F, the sealing device applies pressure to the passive sealing element (2) and forces the passive sealing element (2) to undergo local elastoplastic deformation. After the active sealing element (1) and passive Between the sealing elements (2), a sealing surface (3) with a perfectly matched shape is formed. Best Mode of the Invention
  • FIG. 2 illustrates a case when the present invention is used as an external seal.
  • the active sealing element (1) applies pressure to the passive sealing element (2) and forces the passive sealing element (2) to undergo local elastic-plastic deformation.
  • (1) and the passive sealing element (2) form a sealing surface (3) that completely matches the shape.
  • FIG. 3 illustrates a case when the present invention is used as an internal seal, which is composed of an active sealing element (1) corresponding to a valve disc, a passive sealing element (2) corresponding to a valve seat, a system control element body (6), and It is composed of the booster lever (7) corresponding to the valve stem. Apply pressure to the passive sealing element (2) through the booster rod (7) and the active sealing element (1), and force the passive sealing element (2) to produce a local elastoplastic deformation. The active sealing element (1) and the passive sealing element (1) 2) to form a sealing surface (3) with a perfect shape.
  • the above sealing surface (3) is formed during the assembly of the elastoplastic sealing device.
  • the sealing surface (3) is formed, when the active sealing element (1) and the passive sealing element (2) are separated, the passive sealing element (2) retains the shape after plastic deformation and rebounds slightly elastically.
  • active sealing element (1) When the passive sealing element (2) is closed again, a sealing effect with a small amount of elastic deformation and a small amount of interference can be achieved. It is precisely because the sealing surface (3) is formed when the elastoplastic sealing device is assembled, so the device has a simple structure, requires low machining accuracy and assembly accuracy, is easy to mass produce, and has low cost. And has a wide range of applications, good sealing performance, can be self-healing.
  • the sealing device of the structure shown in FIG. 2 is another embodiment when the present invention is applied to the external sealing of a fluid pipeline system.
  • the original pipe flange connection method is used, and one side of the flange is used as an active sealing element (1), and a boss having the same shape as a flanged punch is processed on the end face, and a flow hole is processed in the middle; Stepped holes are processed on the end face of the flange (5); Passive sealing element (2) is pressed into the stepped holes of the flange S with radial interference; holes on the end face are suitable for flanging by the active sealing element (1) .
  • the active sealing element (1) applies pressure to the passive sealing element (2) and forces the end face of the passive sealing element (2) to undergo a flanging deformation. After the active sealing element (1) is deformed, ) And the passive sealing element (2), a sealing surface (3) with a completely matching shape is formed to realize self-tight sealing.
  • the flange as the active sealing element (1) is made of carbon-bonded steel, and the passive sealing element (2) is made of low-carbon steel sheet.
  • the sealing device is suitable for fluid pipeline transportation systems.
  • the sealing device of the structure shown in FIG. 3 is another embodiment when the present invention is applied to sealing in a fluid pipeline system.
  • the valve disc is used as the active sealing element (1), and the end is processed into the shape of a flanged punch.
  • the valve body (6) is machined with a step hole corresponding to the position of the valve disc; 2) It is made of metal plate and presses into the step hole of the valve body (6) with radial interference.
  • the end face is processed with a hole suitable for being flanged by the active sealing element (1).
  • valve disc active sealing element (1) applies pressure to the passive sealing element (2), and forces the end face of the passive sealing element (2) to be flanged and deformed after the active sealing element (1) and Between the passive sealing elements (2), a sealing surface (3) with a completely matching shape is formed to realize self-tight sealing.
  • the valve disc as the active sealing element (1) is made of carbon-bonded steel, and the passive sealing element (2) is made of low-carbon steel plate. The device is suitable for a fluid pipeline transportation system.
  • the technical parameters and sealing performance requirements of the elastoplastic metal sealing device of the present invention can be determined according to existing fluid pipeline design methods; the technical parameters of the active sealing element (1) and the passive sealing element (2) can be in accordance with the sealing performance requirements Determined according to the existing design method of pressure forming.
  • the choice of sealing material can be achieved by using the original metal material.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Sealing Devices (AREA)

Description

弹塑性金属密封装置 技术领域
本发明涉及一般工程的密封， 具体地说， 是提供一种用于流体管路系统中的弹 塑性金属密封装置。
背景技术
目前现有技术中， 用于流体管路系统中的密封装置， 按其密封面所使用的材料 来分有两大类。一类是选用非金属材料来加工密封元件， 实现非金属与非金属或者非 金属与金属之间密封。这类密封装置， 由于非金属材料加工的密封元件， 机械强度和 性能稳定性差， 在流体介质的温度、 压力、 化学成分、 流动冲击等因素影响下， 容易 造成非金属密封元件的损坏一一^ ¾封失效。 另一类是选用金属材料来加工密封元件， 实现金属与金属之间的密封。 这类密封装置， 根据密封面结构及其形成方式不同， 可 以分为三种。第一种是机械加工密封面密封装置。这种密封装置， 密封元件是事先加 工好的，密封面加工精度和密封元件装配精度要求高，因此加工周期长，生产成本高。 第二种是强制性密封装置。这种密封装置是通过密封元件向密封垫圈施压， 强制密封 垫圈产生塑性变形， 填满微隙， 实现密封。 这种密封装置中， 介质压力总是趋向于减 小预紧密封比压， 降低密封性能。 第三种是自紧密封装置。 这种密封装置， 密封面也 是事先加工好的， 不同的是它通过复杂的机构， 使介质压力总是趋于增加预紧密封比 压， 增加密封性能。 但由于其结构复杂， 非金属密封元件密封装置， 机械强度和性能 稳定性差； 金属密封装置， 机械加工精度高， 周期长， 费用高。 以用于流体管路系统 中内密封的阀门为例， 《阀门设计手册》中指出， 各国对常用的阀门不仅制定了技术 要求， 甚至对许多结构尺寸出制定的标准。这在一定程度上就是为了解决现有密封装 置加工及装配精度高， 特别是解决维修周期长的问题而制定的。
本发明的任务是提供一种结构简单、 成本低的弹塑性金属密封装置， 使之应用 范围广， 对加工精度要求低， 密封性能好。
发明内容
本发明的弹塑性金属密封装置， 由一个主动密封元件和一个被动密封元件组成。 其特征在于： 主动密封元件具有压力加工成形模具工作部分一样的形状和部分性能， 被动密封元件具有被主动密封元件压力加工成形的形状和性能。当主动密封元件向被 动密封元件施加压力时， 被动密封元件被迫发生弹塑性变形后， 在主、被动密封元件 之间产生一个形状完全吻合的密封面， 并能达到微量过盈的配合效果而实现密封。而 被动密封元件与另一端间的密封可按常规技术进行。
由于该装置采用于压力加工成形技术， 实现了金属密封， 应用范围广； 被动密 封元件的弹塑性变形， 实现了自动找正、 自动修复， 对加工精度要求低； 被动密封元 件的弹塑性变形， 实现了完全吻合的密封面并呈微量过盈配合， 密封性能好。 而且， 由于被动密封元件弹塑性变形的工艺性要求， 可以方便地实现自紧密封。上述密封装 置中的主动密封元件和被动密封元件都可由弹塑性金属制成。
下面结合附图和具体实施方式对本发明作进一步详细的说明
附图概述
图 1是本发明弹塑性金属密封装置的原理图
图 2是本发明应用于流体管路系统外密封时的示意图
图 3是本发明应用于流体管路系统内密封时的示意图
图 1所描述的弹塑性金属密封装置包括一个主动密封元件 （ 1 ) 和一个被动密 封元件 （ 2 ) 。 该密封装置在外力 F的作用下， 主动密封元件 （ 1 ) 向被动密封元件 ( 2 )施加压力， 并迫使被动密封元件 （ 2 )产生局部弹塑性变形后， 在主动密封元 件 （ 1 ) 和被动密封元件 （ 2 ) 之间， 形成一个形状完全吻合的密封面 （ 3 ) 。 本发明的最佳实施方式
图 2 所描述的是本发明作为外密封时的一种情况， 由法兰状的主动密封元件 ( 1 ) ， 环形的被动密封元件 （ 2 ) ， 系统管件 （ 5 )及紧固罗栓 （ 4 )组成。 该密 封装置在紧固罗栓 （ 4 ) 的作用下， 主动密封元件 （ 1 ) 向被动密封元件 （ 2 )施加 压力， 并迫使被动密封元件 （ 2 )产生局部弹塑性变形后， 在主动密封元件 （ 1 )和 被动密封元件 （ 2 ) 之间， 形成一个形状完全吻合的密封面 （ 3 ) 。
图 3所描述的是本发明作为内密封时的一种情况， 由相当于阀瓣的主动密封元 件 （ 1 ) ， 相当于阀座的被动密封元件 （ 2 ) ， 系统控制元件体 （ 6 )及相当于阀杆 的加力杆 （ 7 )组成。通过加力杆 （ 7 )及主动密封元件 （ 1 )向被动密封元件 （ 2 ) 施加压力， 并迫使被动密封元件 （ 2 ) 产生局部弹塑性变形， 在主动密封元件 （ 1 ) 和被动密封元件 （ 2 ) 之间， 形成一个形状完全吻合的密封面 （ 3 ) 。
需要明确指出的是， 上述密封面 （ 3 ) ， 是弹塑性密封装置在装配时形成的。 当密封面 （ 3 ) 形成后， 主动密封元件 （ 1 )和被动密封元件 （ 2 )分离时， 被动密 封元件 （2 )保留塑性变形后的形状，略有弹性变形性质的回弹。当主动密封元件 （ 1 ) 和被动密封元件 （ 2 )再次闭合时，可以实现有微量弹性变形、微量过盈的密封效果。 正是由于密封面 （ 3 ) 是在弹塑性密封装置装配时形成的， 因此该装置的结构简单, 对机械加工精度及装配精度要求低，易于大批量生产，成本低。并且具有应用范围广， 密封性能好， 可以自修复的的特点。
工业应用性
图 2所示结构的密封装置又是本发明应用于流体管路系统外密封时的一实施例。 沿用原有的管路法兰联结方式， 一侧的法兰作为主动密封元件 （ 1 ) , 其端面上加工 有象翻边凸模一样形状的凸台， 中间加工有过流孔； 另一侧的法兰 （ 5 )端面上加工 有台阶孔； 被动密封元件 （2 )径向过盈压入法兰 S的台阶孔内， 端面上加工有适于 被主动密封元件 （ 1 ) 翻边的孔。 在紧固罗栓 （ 4 ) 的作用下， 主动密封元件 （ 1 ) 向被动密封元件 （ 2 )施加压力，并迫使被动密封元件 （ 2 )的端面产生翻边变形后， 在主动密封元件 （ 1 )和被动密封元件 （ 2 )之间， 形成一个形状完全吻合的密封面 ( 3 ) , 实现自紧密封。 作为主动密封元件 （ 1 ) 的法兰由碳结钢制造， 被动密封元 件 （ 2 ) 由低碳钢板材制造， 该密封装置适用于流体管路输送系统。
图 3所示结构的密封装置又是本发明应用于流体管路系统内密封时的另一实施 例。 沿用角闽的结构形式， 阀瓣作为主动密封元件 （ 1 ) ， 端部加工成翻边凸模一样 的形状.， 阀体 （ 6 )对应于阀瓣的位置加工有台阶孔； 被动密封元件 （ 2 ) 由金属板 材制成，径向过盈压入阀体 （6 )的台阶孔内，端面上加工有适于被主动密封元件 （ 1 ) 翻边的孔。 在阀杆 （ 7 ) 的作用下， 阀瓣主动密封元件 （ 1 ) 向被动密封元件 （ 2 ) 施加压力， 并迫使被动密封元件 （ 2 )端面产生翻边变形后在主动密封元件 （ 1 )和 被动密封元件 （ 2 ) 之间， 形成一个形状完全吻合的密封面 （ 3 ) ， 实现自紧密封。 作为主动密封元件 （ 1 )的阀瓣由碳结钢制造，被动密封元件 （ 2 )由低碳钢板制造， 该装置适用于流体管路输送系统。
本发明弹塑性金属密封装置的技术参数， 密封性能要求部分， 可以根据现有的流 体管路设计方法确定； 主动密封元件 （ 1 )和被动密封元件 （ 2 ) 的技术参数， 可以 依照密封性能要求， 根据现有压力加工成形设计方法确定。密封材料的选择， 沿用原 有的金属材料就可以实现。
更正页 （细则第 91条)

Claims

权 利 要 求
1 . 一种弹塑性金属密封装置， 由一个主动密封元件和一个被动密封元件组成， 其特征在于： 主动密封元件 （ 1 )具有压力加工成型模具工作部分一样的形状， 被动 密封元件 （ 2 )具有被主动密封元件 （ 1 )压力加工成形的形状，主动密封元件 （ 1 ) 向被动密封元件 （ 2 ) 施加压力， 被动密封元件 （ 2 ) 被迫产生局部弹塑性变形后， 在主动密封元件 （ 1 ) 和被动密封元件 （ 2 ) 之间产生一个形状完全吻合的密封面
( 3 ) „
2 . 如权利要求 1所述的弹塑性金属密封装置， 其特征在于： 主动密封元件 （ 1 ) 和被动密封元件 （ 2 ) 都是由弹塑性金属材料制成的
3 .如权利要求 1所述的弹塑性金属密封装置，其特征在于：主动密封元件 （ 1 )， 其端面上加工有翻边凸模一样形状的凸台， 中间加工有过流孔； 另一侧的法兰 （ 5 ) 端面上加工有台阶孔； 被动密封元件 （ 2 )径向过盈压入法兰 S的台阶孔内， 端面上 加工有适于被主动密封元件 （ 1 )翻边的孔， 在紧固罗栓 （ 4 ) 的作用下， 主动密封 元件 （ 1 ) 向被动密封元件 （ 2 )施加压力， 并迫使被动密封元件 （ 2 ) 的端面产生 翻边变形后， 在主动密封元件 （ 1 )和被动密封元件 （ 2 )之间， 形成一个形状完全 吻合的密封面 （ 3 ) 。
4 . 如权利要求 1所述的弹塑性金属密封装置， 其特征在于： 阀瓣作为主动密封 元件 （ 1 ) ， 端部加工成翻边凸模一样的形状； 阀体 （ 6 )对应于阀瓣的位置加工有 台阶孔； 被动密封元件 （ 2 )径向过盈压入阀体 （ 6 ) 的台阶孔内， 端面上加工有适 于被主动密封元件 （ 1 )翻边的孔，在阀杆 （ 7 )的作用下， 阀瓣主动密封元件 （ 1 ) 向被动密封元件 （ 2 )施加压力， 并迫使被动密封元件 （ 2 )端面产生翻边变形后在 主动密封元件 （ 1 ) 和被动密封元件 （ 2 ) 之间， 形成一个形状完全吻合的密封面 ( 3 ) o
PCT/CN1998/000098 1997-06-13 1998-06-12 Dispositif d'etancheite metallique a plasticite flexible WO1998058197A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU77559/98A AU7755998A (en) 1997-06-13 1998-06-12 Flexible-plastic metallic seal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN97112471.X 1997-06-13
CN97112471A CN1064749C (zh) 1997-06-13 1997-06-13 弹塑性金属密封装置

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WO1998058197A1 true WO1998058197A1 (fr) 1998-12-23

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AU (1) AU7755998A (zh)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5632406B2 (ja) * 2012-02-07 2014-11-26 株式会社鷺宮製作所 流量制御弁
JP6606426B2 (ja) * 2015-12-24 2019-11-13 Ｋｙｂ株式会社 バルブ装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2328805A (en) * 1941-06-13 1943-09-07 Galvin Mfg Corp Valve mechanism
GB1561593A (en) * 1975-10-02 1980-02-27 Fisher Controls Co Valve structure
GB2105823A (en) * 1981-09-11 1983-03-30 Winn Charles Butterfly valve
US4457523A (en) * 1982-10-29 1984-07-03 Pressure Science Incorporated Torsionally flexible metallic annular seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2328805A (en) * 1941-06-13 1943-09-07 Galvin Mfg Corp Valve mechanism
GB1561593A (en) * 1975-10-02 1980-02-27 Fisher Controls Co Valve structure
GB2105823A (en) * 1981-09-11 1983-03-30 Winn Charles Butterfly valve
US4457523A (en) * 1982-10-29 1984-07-03 Pressure Science Incorporated Torsionally flexible metallic annular seal

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AU7755998A (en) 1999-01-04
CN1064749C (zh) 2001-04-18
CN1182845A (zh) 1998-05-27

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