[go: up one dir, main page]

WO1991019921A1 - Dispositif de vanne, grande vanne spherique en particulier - Google Patents

Dispositif de vanne, grande vanne spherique en particulier Download PDF

Info

Publication number
WO1991019921A1
WO1991019921A1 PCT/NO1991/000087 NO9100087W WO9119921A1 WO 1991019921 A1 WO1991019921 A1 WO 1991019921A1 NO 9100087 W NO9100087 W NO 9100087W WO 9119921 A1 WO9119921 A1 WO 9119921A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
seat
sealing
seal holder
arrangement according
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.)
Ceased
Application number
PCT/NO1991/000087
Other languages
English (en)
Inventor
Knut Horvei
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.)
Equinor ASA
Original Assignee
Den Norske Stats Oljeselskap AS
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
Priority claimed from NO902752A external-priority patent/NO175829C/no
Priority claimed from NO902753A external-priority patent/NO173624C/no
Priority claimed from NO902751A external-priority patent/NO902751D0/no
Application filed by Den Norske Stats Oljeselskap AS filed Critical Den Norske Stats Oljeselskap AS
Publication of WO1991019921A1 publication Critical patent/WO1991019921A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0668—Single packings
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces

Definitions

  • This invention relates to a valve arrangement, in particular large ball valves for use in oil and gas installations for offshore production.
  • ball valves and various other common valve types for example gate 5 valves, comprise a valve member, the active sealing faces of which may be adapted to undergo relative sliding against • • cooperating valve seat parts during valve operation, these valve seat parts being usually provided with a gasket element.
  • Known valve designs of this kind may comprise a 0 seat or seal holder which is movable in relation to the valve member, for example under the influence of spring force.
  • a front portion of the seat or seal holder in association with a compara ⁇ tively soft main gasket is designed with a protruding edge or ridge extending along the whole contour of the main gasket and being directed towards the valve member, but having a certain, small spacing therefrom under normal sealing function provided by the main gasket, and that the protruding edge or ridge upon an increase in sealing force and a movement of the seal holder as a result thereof, is adapted to engage in direct and sealing contact with a cooperating surface on the valve member for attaining an improved and secured sealing in the valve. It is particularly advantageous according to the invention to locate the protruding edge or ridge outwardly of the main gasket as seen in relation to the flow passage through the valve.
  • This arrangement will have the intended function irrespective of whether the main gasket is mounted'on the seat or seal holder or possibly on the movable .valve member.
  • an auxiliary sealing element which can establish a purely metallic seal independent of or as an addition to the sealing effect of the main gasket.
  • This comparatively soft main gasket will be pressed more or less flat when the movable seat or seal holder is urged under relatively large force against the valve member so that the protruding edge or ridge will enter into sealing engagement therewith.
  • the solution offered here will provide two separate sealing systems in the same valve, based on a comparatively soft sealing element respectively sealing between metal parts having a suitable hardness. This will secure tightness in all situations.
  • the arrange- ment according to the invention will also be of specific advantage during a fire or other overheating, which can involve melting or deformation of the soft main gasket or seal.
  • a second aspect of the arrangement according to the invention consists therein that the seat or seal holder is provided with a piston member incorporated in a hydraulic or pneumatic system being at least adapted to move the seat or seal holder in a direction away from the valve member in order to facilitate movement thereof when a valve operation is initiated.
  • This aspect is closely related to the preceding one.
  • valves of this kind which have mechani ⁇ cally movable components and parts, is the. occurrence of collections or deposits of small particles from flowing media, in joints, cavities and chambers which communicate more or less directly with the flow passage through the valve. Especially in large valves which stand in the same position for extended times, .this can lead to significant difficulties, in the first place when the valves shall be moved or reset. Small particles and materials which gather. : --ir ⁇ joints, slits and openings or the like, after a time may harden to solid deposits which can cause damage of the valve parts concerned and perhaps in particular on gaskets in regions of relative movements during valve operation.
  • the cavities or chambers mentioned here are adapted to communicate with a flow passage through the valve, by means of at least one comparatively small orifice which is preferably adapted to lie at a high point in the filler mass system when the valve has been installed.
  • An additional and more advantageous embodiment consists therein that the above cavities or chambers are ' adapted to be put into communication with a flow passage through the valve, by means of a number of comparatively large openings which are normally closed with a blocking member adapted to be pressed out into the flow passage at a given increase of the pressure in the filler mass.
  • Fig. 1 shows a simplified axial section through- ' the ball valve
  • Fig. 2 in partial section and enlarged shows a seat or seal ring which is incorporated in the valve of Fig. 1
  • Fig. 3 in still more enlargement and in axial section shows details of the sealing between the valve ball and the housing in the valve of Fig. 1.
  • the ball valve of Fig. 1 comprises main parts in the form of a housing 1, a cover 2 and valve ball 3 which during valve operation is rotated by means of • 5 stem 5 which penetrates through the cover 2.
  • the valve is provided with seals, for example between housing and cover, and flanges or the like for connection to pipelines or other components in the installation concerned.
  • the flow passage through the 10 valve is indicated, and Fig. 1 shows the valve in its open position.
  • a movable seat or seal holder 10 is provided for cooperation with active sealing ces on the ball 3, and is axially movable in relation to the ball.
  • a seal ring 3 15 which is attached to the housing 1 by means .of bolts, serves to keep the seat or seal holder 10 in position. Details of this structure will appear better from Figs. 2 and 3.
  • Fig. 2 shows the holder 10 alone and without any 20 sealing elements inserted.
  • a groove 11A adapted to receive a main seal or gasket 11 as will be seen in Fig. 3.
  • a piston having two oppositely facing piston areas 15A and 15B. Circu - 25 ferential grooves in the * piston serve to receive gasket elements.
  • an extended skirt 17 having details and functions to be explained more closely with reference to Fig. 3.
  • a main seal or gasket 11 is seen in sealing 30 engagement with an active sealing face 3A on the valve ball 3.
  • the holder 10 here comprises both the valve seat and the actual seal 11.
  • a specific design of the front portion of the seal holder 10 towards the ball 3 makes it • possible to obtain an improved or secured sealing in the 35 valve, inter alia in the case of damage to the gasket 11, for example by fire or another accident.
  • this front portion has a protruding edge or ridge 19 which by normal valve function, i.e. wherein the main gasket 11 provides for the required sealing, has a certain small spacing from the cooperating sealing face 3A on the ball 3.
  • the holder 10 can however by means of hydraulic pressure against piston area 15B be urged in a direction towards ball 3, so that edge or ridge 19 comes into contact with sealing face 3A and thereby provides a supplementary sealing effect which in a given situation can completely take over the sealing effect from the main gasket 11.
  • the main gasket 11 will be made of a comparatively soft material, in particular when compared to the material in the holder 10 and thereby the edge 19, which normally will be of a metal, for example steel.
  • the edge or ridge 19 extends in a circle around the whole holder 10 in principle parallel to and quite near the groove for the main gasket 11.
  • the relationship between the edge or ridge 19 and the main gasket 11 can be changed, but it is preferred according to the invention that these elements have a mutual relation ⁇ ship substantially as illustrated in the drawing, so that both the main gasket 11 and the edge 19 can cooperate with substantially the same sealing surface 3A on the ball 3.
  • the holder 10 is axially movable as already mentioned, and is for this purpose located in a cavity or chamber formed in the valve housing 1 itself, whereby a seal ring 8 by means of bolts 8A keeps the whole assembly in position.
  • ring shaped seals or gaskets of which for example gasket 9 seals between ring 8 and the radially outer cylindrical surface of holder 10, whereas gasket 16A in a corresponding way seals between holder 10 and the surrounding housing 1.
  • a number of compression springs 13 provided each in a cavity 14 serve to urge holder 10 in a direction towards ball 3, so that all the time there is exerted a sealing force between main gasket 11 and sealing face 3A.
  • Similar spring actuated seal holders are previously known per se.
  • An essential feature in the design consists in the double acting piston 15 having piston areas 15A and 15B respectively, of which the latter is subjected to a fluid pressure in a cylinder chamber 16 receiving hydraulic pressure through an oil channel 22. At a sufficient pressure through channel 22 holder 10 will be urged in a direction towards valve ball 3, i.e. in the same direction as compression springs 13 are acting. In order to obtain the above mentioned improvement or securing of the seal by means of edge 19, the pressure in channel 22 is thus raised in order to bring about a sufficiently large increase in the sealing force to bring edge 19 into sealing contact with surface 3A.
  • An opposite and perhaps much more important function provided for by the hydraulic system consists in raising the pressure in the hydraulic oil channel 21 which gives an increased pressure on piston area 15A with a resulting movement of holder 10 away from ball 3.
  • This is a highly- advantageous function for the purpose of avoiding problems with resetting a large ball valve for example, when this for an extended time has been standing in a certain position.
  • main gasket 11 and possibly edge 19 will be lifted away from sealing face 3A of the ball, so that turning of valve ball 3 to another position, for example a closed position, can be initiated with a moderate or usual torque in stem 5 (Fig. 1) .
  • an injection channel 30 as referred to is provided for the purpose of injecting a filler mass, for example a particular type of oil or another liquid medium which can fill all cavities and chambers, in particular around springs 13 , so that the above problems of intrusion or deposits do not " arise.
  • a filler mass for example a particular type of oil or another liquid medium which can fill all cavities and chambers, in particular around springs 13 , so that the above problems of intrusion or deposits do not " arise.
  • venting orifice 31 which puts cavity 14 and other chambers or the like in communication with flow passage P. Provided that these orifices or openings 31 are relatively small there will be no problem with leakages between the filler mass system and the main flow passage P.
  • Blocking members 33A can be ' " suitably dimensioned metal discs which yield at a predetermined increased.pressure in the filler mass so that the desired fluid communication is obtained.
  • the skirt 17 has a particular function in this connec ⁇ tion. As will be seen from Fig. 3 the end piece of the skirt is cut into an inclined edge which during return movement of seal holder 10 will have a cutting and/or cleaning effect on the adjacent interior cylindrical surface in housing 1.
  • a main gasket is shown mounted in the valve housing, i.e. on a movable seal holder.
  • a modification -is quite possible namely in alterna ⁇ tive embodiments where the gasket is mounted on the valve ball or valve member in the case of other types of valves and a ball valve.
  • the gasket is mounted on the valve ball or valve member in the case of other types of valves and a ball valve.
  • there will be a cooperating valve seat on a seat holder which may be moved quite in analogy to the seal holder in the embodiment of " the drawings.
  • the situation in an alternative embodiment having a gasket element on the valve member will be quite analogous and the solution according to the invention will have the same advantages as discussed above.
  • filler mass or material As to the type of filler mass or material, it will be possible to employ. various commercially available products which can for example be based on oil and are preferably water repellant, as well as having a more or less low viscosity, but preferably being mere fluid than common lubrication grease.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

Dispositif de vanne, grande vanne sphérique en particulier, destiné à être utilisé dans les installations d'exploitation offshore de gisements de pétrole et de gaz, comprenant une vanne (3) proprement dite dont les faces d'obturation actives (3A) sont de préférence conçues pour pouvoir glisser contre des pièces (11) de siège de vanne coopérantes. La vanne comprend un siège mobile ou porte-joint (10). Une partie frontale du siège ou porte-joint (10) associée à un joint principal (11) relativement mou, possède un bord ou une arête (19) faisant saille, s'étendant sur tout le pourtour du joint principal (11), dirigé vers la vanne (3) proprement dite. Dans les conditions normales d'obturation par le joint principal (11), il y a un certain espace, de petite dimension, entre l'arête (19) du porte-joint et la vanne (3). Le bord ou l'arête (19) faisant saillie est conçu(e) pour, en cas d'augmentation de la force d'obturation et du déplacement du porte-joint (10) résultant de cette augmentation, venir en contact direct d'obturation avec une surface coopérante (3A) de la vanne (3) proprement dite, créant ainsi une étanchéité améliorée et sûre dans la vanne.
PCT/NO1991/000087 1990-06-20 1991-06-17 Dispositif de vanne, grande vanne spherique en particulier Ceased WO1991019921A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NO902752A NO175829C (no) 1990-06-20 1990-06-20 Anordning ved ventil, særlig stor kuleventil
NO902753A NO173624C (no) 1990-06-20 1990-06-20 Anordning ved ventil, saerlig stor kuleventil for bruk i olje- og gassinstallasjoner
NO902753 1990-06-20
NO902751 1990-06-20
NO902752 1990-06-20
NO902751A NO902751D0 (no) 1990-06-20 1990-06-20 Anordning ved ventil.

Publications (1)

Publication Number Publication Date
WO1991019921A1 true WO1991019921A1 (fr) 1991-12-26

Family

ID=27353139

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1991/000087 Ceased WO1991019921A1 (fr) 1990-06-20 1991-06-17 Dispositif de vanne, grande vanne spherique en particulier

Country Status (2)

Country Link
AU (1) AU7999791A (fr)
WO (1) WO1991019921A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5413310A (en) * 1991-07-12 1995-05-09 Den Norske Stats Oljeselskap A.S Valve arrangement
WO2006112917A1 (fr) * 2005-04-18 2006-10-26 Fisher Controls International Llc Vanne de régulation du flux de liquide avec joint
WO2009026737A1 (fr) * 2007-08-24 2009-03-05 Fan, Fandy Robinet à tournant sphérique fixe
CN108253154A (zh) * 2018-03-28 2018-07-06 福建翰达流体控制设备有限公司 固定球球阀阀座的弹性密封结构
WO2018236223A2 (fr) 2017-06-19 2018-12-27 Sil Valves As Dispositif d'étanchéité de soupape

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2050572A (en) * 1979-06-01 1981-01-07 Grove Valve & Regulator Co Fire safety seal in or for a fluid flow control valve
US4345738A (en) * 1980-08-25 1982-08-24 Grove Valve And Regulator Company Fire safe seal
GB2135431A (en) * 1982-12-22 1984-08-30 Kitz Corp Ball valve
US4566482A (en) * 1985-06-27 1986-01-28 Stunkard Gerald A Top entry trunnion ball valve
GB2188708A (en) * 1986-04-04 1987-10-07 Grove Spa Fire-safe ball valve
NO159681B (no) * 1984-04-10 1988-10-17 M & D Valves Limited Kuleventil.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2050572A (en) * 1979-06-01 1981-01-07 Grove Valve & Regulator Co Fire safety seal in or for a fluid flow control valve
US4345738A (en) * 1980-08-25 1982-08-24 Grove Valve And Regulator Company Fire safe seal
GB2135431A (en) * 1982-12-22 1984-08-30 Kitz Corp Ball valve
NO159681B (no) * 1984-04-10 1988-10-17 M & D Valves Limited Kuleventil.
US4566482A (en) * 1985-06-27 1986-01-28 Stunkard Gerald A Top entry trunnion ball valve
GB2188708A (en) * 1986-04-04 1987-10-07 Grove Spa Fire-safe ball valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5413310A (en) * 1991-07-12 1995-05-09 Den Norske Stats Oljeselskap A.S Valve arrangement
WO2006112917A1 (fr) * 2005-04-18 2006-10-26 Fisher Controls International Llc Vanne de régulation du flux de liquide avec joint
WO2009026737A1 (fr) * 2007-08-24 2009-03-05 Fan, Fandy Robinet à tournant sphérique fixe
WO2018236223A2 (fr) 2017-06-19 2018-12-27 Sil Valves As Dispositif d'étanchéité de soupape
WO2018236223A3 (fr) * 2017-06-19 2019-02-21 Sil Valves As Dispositif d'étanchéité de soupape
US11384844B2 (en) 2017-06-19 2022-07-12 Sil Valves As Valve seal device
CN108253154A (zh) * 2018-03-28 2018-07-06 福建翰达流体控制设备有限公司 固定球球阀阀座的弹性密封结构

Also Published As

Publication number Publication date
AU7999791A (en) 1992-01-07

Similar Documents

Publication Publication Date Title
CA1125727A (fr) Scellement de siege de soupape par contact metal-metal
KR100501494B1 (ko) 슬라이더 및 파이프 브리지 슬라이더
EP0573399B1 (fr) Siège d'étanchéité pour vannes du type ANSI classe V
US4625942A (en) Valve assembly, seat and seal
US4286614A (en) High temperature ball valve
RU2005127628A (ru) Регулирующий клапан
IE49968B1 (en) Packing assembly for sealing a movable shaft to a housing
US7111821B2 (en) Control valve, in particular plug valve with sealing system
US6609716B2 (en) Wiper seal
GB2065798A (en) High-pressure mechanically live seal
EP0701079B1 (fr) Vanne à opercules à dilatation
EP0981701B1 (fr) Joint d'etancheite de tampon
WO1991019921A1 (fr) Dispositif de vanne, grande vanne spherique en particulier
USRE29299E (en) Self sealing gate valve
JP3422330B2 (ja) ダブルシート弁を漏れなしに切り替える方法とこの方法を実施するための密封配置構成
US5868160A (en) Two-way insert valve
EP0681666B1 (fr) Vanne
US7309058B2 (en) Flexible backseat seal for gate valve
JP3304446B2 (ja) パッキン
CA1042935A (fr) Etancheite sur ajutage
GB2166518A (en) Nonfloating seat for expanding gate valves
US5676347A (en) Valve with adjustably pressurized sealing gaskets
SU470125A3 (ru) Задвижка трубопровода
CA1208191A (fr) Garniture d'etancheite bidirectionnelle pour vanne a papillon
CA2886065A1 (fr) Vanne a haute pression

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR CA CH DE DK ES FI GB HU JP KP KR LK LU MC MG MW NL NO PL RO SD SE SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BF BJ CF CG CH CI CM DE DK ES FR GA GB GN GR IT LU ML MR NL SE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA