US3605795A - Spindle valve - Google Patents

Spindle valve Download PDF

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Publication number
US3605795A
US3605795A US794537*A US3605795DA US3605795A US 3605795 A US3605795 A US 3605795A US 3605795D A US3605795D A US 3605795DA US 3605795 A US3605795 A US 3605795A
Authority
US
United States
Prior art keywords
siphon
housing
valve
spindle
closure means
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US794537*A
Other languages
English (en)
Inventor
Gundolf Rajakovics
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Boehler and Co AG
Original Assignee
Gebrueder Boehler and Co AG
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 Gebrueder Boehler and Co AG filed Critical Gebrueder Boehler and Co AG
Application granted granted Critical
Publication of US3605795A publication Critical patent/US3605795A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K49/00—Means in or on valves for heating or cooling
    • F16K49/002—Electric heating means
    • 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
    • Y10T137/6416—With heating or cooling of the system
    • Y10T137/6525—Air heated or cooled [fan, fins, or channels]
    • 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
    • Y10T137/6416—With heating or cooling of the system
    • Y10T137/6606—With electric heating element

Definitions

  • a spindle valve for preventing the escape of an operating medium and resistant to extreme temperature differentials in said medium, the valve including a housing and an axially movable spindle having a closure means at one end adjacent a valve seat in the housing.
  • a siphon surrounds the spindle and is spaced from the closure means, and a tube connects the closure means to the siphon.
  • a siphon chamber exists between the siphon and the housing, and a narrow annulus exists between the tube and the housing. Cooling fins are connected to the housing adjacent the narrow annulus, and a heating means surrounds the siphon chamber.
  • This invention concerns spindle valves generally, and specifically a device for sealing spindles axially movable in a housing to prevent the escape of an operating medium, for example, liquid sodium for use in nuclear reactors.
  • a siphon surrounds the spindle and a narrow radial gap, relative to its length, is provided between the housing and the spindle axially between the siphon and a valve disk.
  • metal siphons are preferably used for sealing.
  • the usual materials lose so much in strength that the loading capacity of siphons made therefrom is very low.
  • the corrosion increases considerably in these materials, particularly at temperatures over 600 C., which can lead to premature failure of the sealing elements in view of the small wall thicknesses of metal siphons.
  • Metal alloys which show better strength properties at high temperatures, contain major portions of alloying elements, such as nickel, for example, which can be dissolved by liquid nickel at temperatures over 600 C., so that the sealing element may likewise fail.
  • the object of the present invention is to avoid the above-mentioned disadvantages and to keep the siphon at a substantially constant temperature of 300 C., for example, substantially independent of the temperature of the operating medium.
  • This is achieved according to the invention by an apparatus of the above-mentioned type by providing a cooling gap having cooling fins provided on its outer wall, and the siphon chamber can be heated, for example, by means of an electric heating coil surrounding it.
  • the inner limiting surface of a coolable gap 1 is defined by a tube-like siphon 8 consisting of a stainless chrome-nickel steel accordian portion having one end attached to valve housing 5, and the other end having a tube 2 sealingly connected with a valve disk 4.
  • the gas space 3 existing between the siphon 8 and a valve spindle 3 is filled with a protective gas, for example, argon, which can be introduced through a nipple 11.
  • the gas space 3' is sealed by a stuffing box which comprises a packing 13 and a gland 12.
  • the outer limiting surface of a coolable gap 1 is defined by a cylindrical part 6 of the housing provided with cylindrical, preferably outwardly extending radially-arranged cooling fins 7.
  • the longitudinal zone of part 6 adjacent the siphon and adjoining the cooling fins 7 is embraced by a heating coil 9 by means of which siphon 8 is electrically heated.
  • the heating coil 9 is surrounded at its sides remote of the siphon by a heat-insulating layer 10.
  • the part 6 with the cooling fins 7 can easily be so dimensioned that, with constant intensity of the electric current traversing the heating coil 9, the temperature of the siphon 8 is practically independent of the temperature of the liquid sodium inside valve housing 5 and, on the other hand, the point of the lowest temperature in the liquid sodium is not in the area of the siphon chamber 8' but in the coolable gap 1. Elimination and concentration of impurities therefore takes place practically only in this gap 1, where the impurities are relatively harmless.
  • the liquid sodium operating medium remains in its liquid state between the siphon 8 and interior 5 of the valve housing 5, even at operating temperatures which are close to the solidification point of liquid sodium, so that the discharge capac ity of the siphon chamber 8 is ensured.
  • valve spindles In a liquid metal system of high temperatures, for example, in circuits of nuclear reactors with sodium cooling, high temperature-variation velocities are to be expected. These particularly impair the behavior of the fittings. Due to the unsymmetry of the currents around the control body of the valves, particularly in corner valves, valve spindles assume greatly varying temperatures under non-stationary temperature conditions because of the high heat transfer coefiicients of liquid metals, so that the valve spindles are bent and a proper operation of the valve is no longer certain.
  • Another advantage of the above-described embodiment of the apparatus according to the invention consists in that thi disadvantage is positively avoided, since, on the one hand, a hollow space 3', preferably filled with protective gas, is provided between the tube 2 and the valve spindle 3, and on the other hand, the tube 2 is only clamped on one end. It can therefore be freely deformed by the above-mentioned temperature shock, with only negligible siphon forces acting as restoring forces.
  • the valve spindle itself remains unaffected by the temperature shock due to the insulating effect of the gas space, and therefore retains its shape.
  • the tubular part can be so dimensioned that it has a practically unlimited life both in view of the corrosion stress at the high temperatures and of the internal stresses due to the temperature shock.
  • a spindle valve which includes a housing, an axially movable spindle having closure means formed on movable spindle, said siphon comprising a tube at said one end of said spindle spaced from the housing to form a narrow gap as compared to the length of the gap, and a bellows at said other end of said spindle spaced from the housing to form a siphon chamber; cooling means arranged on the housing adjacent said narrow gap; and heating means arranged on the housing adjacent said bellows, wherein the medium present in said narrow gap is cooled and that portion of the medium present in said siphon chamber is heated.
  • cooling means are cooling ribs attached to that portion of the housing surrounding said narrow gap.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Diaphragms And Bellows (AREA)
  • Temperature-Responsive Valves (AREA)
US794537*A 1968-01-29 1969-01-28 Spindle valve Expired - Lifetime US3605795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT82768*#A AT327335B (de) 1968-01-29 1968-01-29 Vorrichtung zur abdichtung von spindeln, insbesondere bei ventilen fur flussige metalle, wie flussiges natrium, z.b. in kernreaktoren

Publications (1)

Publication Number Publication Date
US3605795A true US3605795A (en) 1971-09-20

Family

ID=3500671

Family Applications (1)

Application Number Title Priority Date Filing Date
US794537*A Expired - Lifetime US3605795A (en) 1968-01-29 1969-01-28 Spindle valve

Country Status (8)

Country Link
US (1) US3605795A (de)
AT (1) AT327335B (de)
CH (1) CH482967A (de)
CS (1) CS150660B2 (de)
DE (1) DE1902810A1 (de)
FR (1) FR2000886A1 (de)
GB (1) GB1213113A (de)
SE (1) SE345924B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541416A1 (fr) * 1983-02-17 1984-08-24 Ducroux Sa Vanne a passage direct a joint solidifie
US5224510A (en) * 1989-11-08 1993-07-06 Ciba-Geigy Corporation Valve
US5678595A (en) * 1995-12-21 1997-10-21 Benkan Corporation Vacuum exhaust valve
US5915410A (en) * 1996-02-01 1999-06-29 Zajac; John Pneumatically operated positive shutoff throttle valve
US5965046A (en) * 1996-04-17 1999-10-12 Applied Materials, Inc. Method and apparatus for baking out a gate valve in a semiconductor processing system
CN104482286A (zh) * 2014-10-31 2015-04-01 双恒阀门有限公司 一种熔盐转运阀
CN104482238A (zh) * 2014-10-31 2015-04-01 双恒阀门有限公司 一种高温熔盐输送节流阀
CN107044563A (zh) * 2017-02-08 2017-08-15 江苏神通阀门股份有限公司 低温阀填料函结构
CN107477191A (zh) * 2017-08-23 2017-12-15 上海空间推进研究所 一种航天器用液态碱金属阀
US20180312279A1 (en) * 2017-04-26 2018-11-01 Marotta Controls, Inc. Electronic pressure regulation system with proportional control valve
CN113216891A (zh) * 2021-04-21 2021-08-06 江苏腾龙石化机械有限公司 一种解冻石油井口

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129140A1 (de) * 1981-07-23 1983-02-03 Kraftwerk Union AG, 4330 Mülheim Elektrohydraulischer stellantrieb fuer turbinenventile
FR2536825A1 (fr) * 1982-11-29 1984-06-01 Electricite De France Dispositif du type robinet a commande magnetique comportant un reducteur
FR2536822A1 (fr) * 1982-11-29 1984-06-01 Electricite De France Dispositif du type robinet a commande magnetique comportant une vis a rouleaux
GB2135027A (en) * 1983-02-12 1984-08-22 John George Frederick Spicer Fluid flow control valves
DE3313999A1 (de) * 1983-04-18 1984-10-25 Danfoss A/S, Nordborg Thermischer stellmotor, insbesondere fuer ventile
FR2559568B1 (fr) * 1984-02-10 1986-07-04 Novatome Dispositif de refroidissement du fourreau de la tige de commande d'un robinet a joint gele
CN109994220B (zh) * 2017-12-29 2024-03-19 核工业西南物理研究院 一种用于聚变堆真空侧的双层带电水路贯穿件

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541416A1 (fr) * 1983-02-17 1984-08-24 Ducroux Sa Vanne a passage direct a joint solidifie
US5224510A (en) * 1989-11-08 1993-07-06 Ciba-Geigy Corporation Valve
US5678595A (en) * 1995-12-21 1997-10-21 Benkan Corporation Vacuum exhaust valve
US5915410A (en) * 1996-02-01 1999-06-29 Zajac; John Pneumatically operated positive shutoff throttle valve
US5965046A (en) * 1996-04-17 1999-10-12 Applied Materials, Inc. Method and apparatus for baking out a gate valve in a semiconductor processing system
US6274854B1 (en) 1996-04-17 2001-08-14 Applied Materials, Inc. Method and apparatus for baking out a gate valve in a semiconductor processing system
CN104482286A (zh) * 2014-10-31 2015-04-01 双恒阀门有限公司 一种熔盐转运阀
CN104482238A (zh) * 2014-10-31 2015-04-01 双恒阀门有限公司 一种高温熔盐输送节流阀
CN104482286B (zh) * 2014-10-31 2018-12-28 双恒阀门有限公司 一种熔盐转运阀
CN104482238B (zh) * 2014-10-31 2019-01-04 双恒阀门有限公司 一种高温熔盐输送节流阀
CN107044563A (zh) * 2017-02-08 2017-08-15 江苏神通阀门股份有限公司 低温阀填料函结构
US20180312279A1 (en) * 2017-04-26 2018-11-01 Marotta Controls, Inc. Electronic pressure regulation system with proportional control valve
CN107477191A (zh) * 2017-08-23 2017-12-15 上海空间推进研究所 一种航天器用液态碱金属阀
CN113216891A (zh) * 2021-04-21 2021-08-06 江苏腾龙石化机械有限公司 一种解冻石油井口
CN113216891B (zh) * 2021-04-21 2022-05-31 江苏腾龙石化机械有限公司 一种解冻石油井口

Also Published As

Publication number Publication date
FR2000886B1 (de) 1973-12-21
CH482967A (de) 1969-12-15
ATA82768A (de) 1975-04-15
SE345924B (de) 1972-06-12
GB1213113A (en) 1970-11-18
CS150660B2 (de) 1973-09-04
AT327335B (de) 1976-01-26
FR2000886A1 (fr) 1969-09-19
DE1902810A1 (de) 1969-09-11

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