CN104930207A - Bi-Directional Seal Assembly For Use With Valves - Google Patents

Bi-Directional Seal Assembly For Use With Valves Download PDF

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Publication number
CN104930207A
CN104930207A CN201510117515.4A CN201510117515A CN104930207A CN 104930207 A CN104930207 A CN 104930207A CN 201510117515 A CN201510117515 A CN 201510117515A CN 104930207 A CN104930207 A CN 104930207A
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CN
China
Prior art keywords
sealing
valve
closure
spacer ring
black box
Prior art date
Application number
CN201510117515.4A
Other languages
Chinese (zh)
Inventor
W·R·法斯
Original Assignee
费希尔控制国际公司
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 to US14/217,791 priority Critical patent/US10054227B2/en
Priority to US14/217,791 priority
Application filed by 费希尔控制国际公司 filed Critical 费希尔控制国际公司
Publication of CN104930207A publication Critical patent/CN104930207A/en

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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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/243—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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup 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
    • 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
    • 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
    • F16K1/46—Attachment of sealing rings
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy, e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member
    • F16K47/08—Means in valves for absorbing fluid energy, e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths

Abstract

Seal assemblies for use with fluid valves are described. An example seal assembly (502) includes a first seal (508) and a second seal (510) opposite the first seal. The first and second seals are to sealingly engage a closure member (504) of a valve and a sealing surface (314) opposite the closure member. A spacer ring (512) is disposed between the first and second seals to prevent the first and second seals from contacting each other. The spacer ring has an aperture (514) therethrough to enable pressurized fluid to flow from a first side of the spacer ring and a second side of the spacer ring opposite the first side.

Description

For the two way sealed assembly of valve

Background technique

Valve is used in process control system the flowing carrying out control procedure fluid usually.Slide bar valve (such as, gate valve, spherical valve, membrane valve, pinch valve etc.) typically has the closure member (such as, valve plug) be arranged in fluid passage.Closure member is operationally couple to actuator by valve rod, and actuator makes closure member move between the open and the closed positions, to allow or the flowing of limit fluid between the entrance and exit of valve.In addition, in order to provide desirable fluid flow characteristics and/or obtain some fluid flow characteristics, valve uses the valve cage in the fluid passage between the entrance and exit being placed at valve usually.Valve cage can reduce flow, weakens noise and/or reduction or eliminate air pocket.In addition, valve cage provides stability, balance and aligning around closure member to closure member.

In order to realize the sealing between valve cage and closure member, closure member typically comprises groove or groove, and it holds Sealing and/or the piston ring of the internal surface engaging valve cage.Typically, the size of valve, the pressure condition of such as process-liquid and operating temperature are (such as, temperature between-100 °F and 450 °F, use during anti-extrusion rings and be greater than the temperature of 450 °F) etc. industrial process conditions be used to determine the type of operable valve and valve assembly, such as, the type of Sealing of the sealing realized between valve cage and closure member is used for.Such as, there is the valve bearing the process-liquid of elevated pressures difference through its flow passage usually use pressure balance closure member to reduce or reduce the thrust or the power that are applied closure member to move to by actuator operating position.In addition, the valve with large-size port or flow passage (such as, diameter is greater than 1 inch) can make to be spring-loaded Sealing to provide to seal more closely.Typically, two way sealed assembly uses usually together with pressure balance closure member, in order to provide two way sealed between valve cage and closure member, thus reduces or eliminates the leakage in forward and reverse fluid flow applications.

Some known two way sealed assemblies comprise spacer ring, are spaced in order to maintain relative Sealing or separate.The size of this spacer ring is suitable for the gap provided between the surface (such as, the internal surface of valve cage) of spacer ring (such as, the outer diameter of spacer ring) and valve cage usually.But due to wearing and tearing, manufacturing tolerances etc., when valve plug moves between the open and the closed positions, spacer ring may engage or contact the surface of valve cage, thereby increases closure member or the friction between black box and valve cage.Although the spacer ring be made up of metallic material can be used to prevent excessively or fast wearing and tearing of spacer ring, this intermetallic spacer ring may wear and tear or damage valve cage surface, causes unwanted leakage thus and decreases life-span of valve cage.

Summary of the invention

Example seal assembly for valve described herein comprises the first Sealing and second Sealing relative with the first Sealing.First Sealing is used for the closure member of sealing engagement valve and the sealing surfaces relative with described closure member with the second Sealing.Spacer ring is arranged between the first Sealing and the second Sealing, contacts with each other in order to prevent the first Sealing and the second Sealing.Described spacer ring has the hole run through from it, moves from the first side of described spacer ring and the second effluent of the described spacer ring relative with the first side to enable pressure fluid.

In another embodiment, black box comprises first Sealing with the first leg and the second leg and second Sealing with the 3rd leg and the 4th leg, form the first chamber between first leg and the second leg, between the 3rd leg and the 4th leg, form the second chamber.Spacer ring is arranged between the first Sealing and the second Sealing, in order to maintain the first Sealing and the second Sealing is separated mutually, contacts with each other to prevent described first Sealing and described second Sealing.Spacer ring is arranged in the first chamber at least partly, and make described spacer ring and described first leg limit the first portion of described first chamber, described spacer ring and described second leg limit the second portion of described first chamber.Described spacer ring is arranged in the second chamber at least partly, and make described spacer ring and described 3rd leg limit the Part III of described second chamber, described spacer ring and described 4th leg limit the Part IV of described second chamber.Described spacer ring comprises hole, flows between the second portion and the Part IV of described second chamber of the first portion of described first chamber and the 3rd parts of described second chamber and described first chamber to enable pressure fluid.

In yet another embodiment, the black box for valve comprises the first seal arrangement and second seal arrangement relative with described first seal arrangement.First seal arrangement and the second seal arrangement are for engaging the closure member of valve and the sealing surfaces relative with described closure member.Described black box comprises the separating device for the first seal arrangement and the second seal arrangement being separated, and contacts with each other to prevent the first seal arrangement and the second seal arrangement.The size of described separating device is configured to make described separating device can not contact described closure member or described sealing surfaces.Described separating device comprises the device for allowing fluid to flow between the first side of described separating device and the second side of the described separating device relative with the first side of described separating device via described separating device.

Accompanying drawing explanation

Fig. 1 shows the viewgraph of cross-section of a part for the known valve implementing known black box.

Fig. 2 shows the enlarged portion of the example valve of Fig. 1.

Fig. 3 shows the viewgraph of cross-section of a part for the valve implementing exemplary black box described herein.

Fig. 4 shows the enlarged portion of the example valve of Fig. 3.

Fig. 5 shows the enlarged portion of the valve implementing another exemplary black box described herein.

Embodiment

Exemplary black box described herein can be used for the valve with slide bar, and such as, control valve, throttle valve etc., it can comprise trim structure (such as, valve cage).Usually, exemplary black box described herein achieves sealing, with the leakage between the closure member (such as, valve plug) substantially preventing sealing surfaces or valve cage and valve.Particularly, exemplary black box described herein comprises the first Sealing and second Sealing relative with the first Sealing, and wherein two Sealings are all arranged between the outer surface of closure member and the internal surface of valve cage.Spacer ring is arranged between the first Sealing and the second Sealing, in order to the underpressure at process-liquid to support Sealing sealing engagement sealing surfaces (such as, the internal surface of valve cage and the outer surface of closure member) time, prevent the first Sealing and the second Sealing from contacting with each other.More specifically, described spacer ring is arranged in the chamber of the first Sealing and the second Sealing at least partly, and size (such as, width or boundary dimension) be suitable for being arranged in the outer surface of the first Sealing and the second Sealing, make described spacer ring can not engage or contact the outer surface of closure member and/or the internal surface of described valve cage.Described spacer ring can be made up of thermoplastic material, polymer, metal or other material any.

Fig. 1 shows the viewgraph of cross-section of a part for known valve 100.Valve 100 shown in Fig. 1 comprises the valve body 102 of the fluid flow passages 104 be limited between entrance 106 and outlet 108.Valve plug 110 is slidably disposed in valve cage 112, and mobile with the fluid flow controlled by valve 100 between the open and the closed positions.Valve plug 110 is couple to actuator (not shown) by valve rod 114, and actuator makes valve plug 110 move towards with away from valve seat 116.In operation, actuator moves valve plug 110 away from valve seat 116, passes through valve 100 and flows (such as, open position), and close to valve seat 116, flowed with limit fluid by valve 100 to allow fluid.Valve plug 110 sealing engagement valve seat 116, in case fluid stopping is dynamic flow through valve 100 (such as, operating position).When valve 100 is positioned at the operating position shown in Fig. 1 (that is, when valve plug 110 sealing engagement valve seat 116), black box 118 prevents the fluid between valve plug 110 and valve cage 112 to leak.

Fig. 2 shows the enlarged portion of valve plug 110, valve cage 112 and black box 118 in Fig. 1.Valve plug 110 comprises the recess 202 holding black box 118.Black box 118 engages the internal surface 204 of valve cage 112, thus valve 100 in operating position time anti-fluid between valve cage 112 and valve plug 110 leak.Black box 118 comprises the first spring be arranged between the shoulder 208 of valve plug 110 and the first spacer ring 210 and loads Sealing 206 and be arranged on the second spring loading Sealing 212 between the first spacer ring 210 and the second spacer ring 214.Black box 218 also comprises retaining ring 216, to be kept by black box 118 or to be supported on together.

First spring loads Sealing 206 and the second spring loading Sealing 212 comprises spring 218a, 218b of being arranged in respective overcoat or outer cover 220a, 220b.Spring 218a, 218b normally spiral spring.When valve 110 moves relative to valve cage 112, spacer ring 210,214 prevents the first spring from loading Sealing 206 and contacts the second spring loading Sealing 212.In addition, spacer ring 210,214 keep-spring loads Sealing 206,212, loading Sealing 206,212 to prevent spring removes or is absorbed between valve cage 112 and valve plug 110, prevent thus Sealing 206,212, the infringement of the operation of valve cage 112 or valve plug 110.Spacer ring 210,214 is made up of metallic material, such as, to prevent the excessive wear to spacer ring 210,214, if Sealing 206 and/or 212 weares and teares, so when valve plug moves between the open and the closed positions, spacer ring 210 and/or 214 engages or contacts the surface of valve cage.Although the spacer ring be made up of metallic material can be used for preventing spacer ring excessively or Fast Wearing, it is surperficial that this intermetallic spacer ring may wear and tear or damage valve cage, causes unwanted leakage thus and reduce life-span of valve cage.

Fig. 3 shows the viewgraph of cross-section of the valve 300 implementing exemplary two way sealed assembly 302 described herein.Valve 300 shown in Fig. 3 comprises valve body 304, and valve body 304 defines the fluid flow passages 306 between the first port or entrance 308 and the second port or outlet 310.In other embodiments, because exemplary black box 302 provides two way sealed, so can be reverse by the direction of the fluid of valve flow, make the second port 310 be ingress ports, the first port 318 be outlet port.

Trim assemblies 312 is placed in fluid flow passages 306, to control fluid flowing between entrance 308 and outlet 310.Trim assemblies 312 comprises the internal component of valve 300, such as, and valve cage 314, closure member 316 (such as, valve plug), valve seat 318 (such as, seat ring) and valve rod 320.

Valve cage 314 is arranged between entrance 308 and outlet 310, to provide some fluid flow characteristics (air pocket such as, reducing noise and/or produced by the flowing of the fluid through valve 300) through valve body 304.Valve cage 314 comprises aperture 322 and at least one opening 324 of accommodation (holding slidably) closure member 316, when valve 300 is positioned at open position (, when closure member 316 is away from valve seat 318), fluid can flow through opening 324.Valve cage can configure in a different manner, carrys out the applicable specific demand controlling application to provide some fluid flow characteristics.Such as, opening 324 can be designed or be configured to provide specific, desirable fluid flow characteristics, such as, reduce noise and/or air pocket, strengthens the pressure drop etc. of process-liquid.This desirable fluid flow characteristics can be obtained by the geometrical construction changing opening 324.In the enforcement that some are exemplary, valve cage 314 can comprise multiple openings with difformity, size and/or spacing, to control by the flowing of valve, reduce air pocket and/or reduce noise.

When closure member 316 is advanced between the open and the closed positions, valve cage 314 guides closure member 316 and provides lateral stability, thus reduces vibration and other mechanical stress.Valve cage 314 can also help other assembly safeguarding, remove and/or change trim assemblies 312.In the illustrated embodiment in which, valve cage 314 is structures of integration in fact.But in other exemplary enforcement, valve cage 314 can be two modular constructions, and it comprises the upper part being couple to lower part removedly.In other embodiments, retainer (not shown) can be used to valve cage 314 to remain in valve body 304.

Closure member 316 has outer surface 326, and the size of outer surface 326 is suitable for closely being arranged in valve cage 314, and closure member 316 can be slided in the aperture 322 of valve cage 314.Closure member 316 can slide in valve cage 314 between the open position at least partially that closure member 316 blocks the operating position of the opening 324 of valve cage 314 and closure member 316 removes (that is, not blocking) opening 324.In the illustrated embodiment in which, closure member 316 is described to valve plug, and it has cylindrical body and seating face 328.But in other embodiments, closure member 316 can be disk or other structure any, to change the flowing of the fluid through valve.

In this embodiment, closure member 316 comprises passage or pipeline 330, with the pressure of balanced action in closure member 316 both sides.In this way, by flow through valve 300 process-liquid pressure be applied to closure member 316 both sides pressure be in a basic balance.Such as, the pressure of the fluid in chamber 332 applies power on the first side of closure member 316 or surface 334, and this power is roughly equal and contrary with the power on the second side or surperficial 336 being applied to closure member 316.Therefore, less actuation force can be provided to move closure member 316 between the open and the closed positions.

Valve rod 320 is operationally couple to closure member 316 at first end 338 and extends through valve gap 340 at the second end 342 and closure member 316 is couple to actuator rod (not shown).Closure member 316 is couple to actuator (not shown) by actuator rod.Actuator (such as, pneumatic actuator) actuate valve stem 320 drive closure member 316 in operating position with open completely or move between peak rate of flow position thus, in operating position, closure member 316 sealing engagement valve seat 318 (such as, seat ring) to limit or anti-fluid is flowed by valve 300, opening completely or peak rate of flow position, closure member 316, away from valve seat 318, passes through valve 300 to allow fluid and flows.On open position, fluid flowing between entrance 318 and outlet 310 via the opening 324 of valve cage and the opening 344 of valve seat 318.In operating position, closure member 316 cover valve cage 314 opening 324 and by sealing surfaces 328 sealing engagement valve seat 318, in case fluid entrance 318 and outlet 310 between flowing.

Valve gap 340 is couple to valve body 304 by fastening piece 346, and valve body 304 is couple to actuator (not shown) by valve gap 340.Valve gap 340 holds filling system 347 (such as, elastic filler), and when valve rod 320 moves along axis 348 or slides in valve 300, filling system 347 prevents via valve rod 320 to extraneous unwanted leakage.Valve gap 340 also comprises packing ring 350, leaks in order to prevent the unwanted fluid via valve body 304.In this embodiment, valve gap 340 is fixed to valve body 304, valve cage 314 and valve seat 318 to be kept (such as, being coordinated by interference fit and/or press-in) in valve body 304.In other embodiments, valve seat 318 is couple to valve cage 314 and/or valve body 314 by such as fastening piece.

Still see Fig. 4, although closure member 316 is closely arranged in the aperture 322 of valve cage 314, gap 402 is formed between closure member 316 and valve cage 314.Fluid leaks by gap 402.Such as, when valve 300 is positioned at operating position, the fluid from entrance 308 can flow through gap 402 and pass the outlet 310 of valve 300 via the pipeline 330 of closure member 316.This unwanted leakage contribution cut-out grade of valve 300.Such as, ANSI has established when to be positioned at operating position from valve and has allowed by the relevant different leakage class (such as, grade I, II, III etc.) of the amount of the fluid of valve flow.Black box 302 is arranged between valve cage 314 and closure member 316, with closure member 316 in operating position time prevent between the entrance 308 of valve 300 and outlet 310 leakage, thus improve the cut-out grade of valve 300.

When closure member 316 is positioned at operating position, exemplary black box 302 prevents the unwanted leakage by gap 402.Therefore, black box 302 achieves the sealing between the first sealing surfaces 404a (such as, the internal surface of valve cage 314) and the second sealing surfaces 404b (such as, the outer surface 326 of closure member 316).Closure member 316 comprises the shoulder 406 holding black box 302.Black box 302 remains between the shoulder 406 of retaining ring 408 and closure member 316 by retaining ring or snap collar 408.Support ring 410 can be arranged between retaining ring 408 and black box 302, to maintain black box 302 relative to the position of closure member 316 and/or orientation.Additionally or alternatively, although not diagram, but black box 302 can comprise anti-extrusion rings (such as, contiguous shoulder 406 and/or support ring 410 are arranged), be extruded in gap 402 to prevent black box 302 when closure member 316 moves between the open and the closed positions.

Black box 302 comprises the first Sealing 412, second Sealing 414 and spacer ring 416.In this embodiment, the first Sealing 412 and the second Sealing 414 basic simlarity or identical.Each in first Sealing 412 and the second Sealing 414 is embodied as spring and loads Sealing.Sealing 412 and 414 comprises respective spring 418a and 418b be arranged in respective overcoat 420a and 420b.The cantilever that spring 418a and 418b comprises annular refers to spring and has V-arrangement (or U-shaped) shape of cross section.Spring 418a and 418b can be made up of such as stainless steel or other suitable material any.Overcoat 420a and 420b is also the form of ring and can is one or part annular.Overcoat 420a and 420b comprises respective chamber or passage 422a and 422b, in order to hold spring 418a and 418b.Overcoat 420a and 420b can be made up of flexible material, and it can not produce too much friction between closure member 316 and valve cage 314.Such as, overcoat 420a and 420b can by fluorinated polymer material (such as, ), elastomeric material or other suitable material any make.When being arranged in respective passage 422a and 422b, spring 418a and 418b provide load to support or outer surface 424a and 424b of deflection overcoat 420a and 420b near the first sealing surfaces 404a and the second sealing surfaces 404b.In other embodiments, the first Sealing 412 can be different from the second Sealing 414.Such as, the overcoat 420a of the first Sealing 412 can be made up of the material that the material of the overcoat 420b from the second Sealing 414 is different.

First Sealing 412 is arranged between closure member 316 and valve cage 314 along the direction contrary with the second Sealing 414 or orientation.Especially, as set forth in the present embodiment, the passage 422a of the first Sealing 412 faces the passage 422b of the second Sealing 414.In this way, the direction of the fluid no matter flowed by valve 300 how, and the first Sealing 412 and the second Sealing 414 provide two way sealed to prevent the leakage between closure member 316 and valve cage 314.

Spacer ring 416 is arranged in passage 422a and 422b of the first respective Sealing 412 and the second Sealing 414 at least partly.When the fluid in flow passage 306 underpressure with pressure support ventilation or support the first Sealing 412 and the second Sealing 414 separate each other time, spacer ring 416 prevents the first Sealing 412 and the second Sealing 414 from contacting with each other.In addition, the size of spacer ring 416 is configured to be arranged in outer surface 424a and 424b of overcoat 420a and 420b.In this way, the size of spacer ring 416 is configured to it and can not engages or contact the first sealing surfaces 404a (i.e. the internal surface of valve cage 314 or aperture 322) and/or the second sealing surfaces 404b.Therefore, spacer ring 416 by the thermoplastic material of such as such as polyether-ether-ketone (PEEK), metal or other suitable material any and/or can stand to have higher temperature (such as, fluid temperature (F.T.) more than 450 °F, is greater than 450 °F by using anti-extrusion rings) the material of fluid make.

And, such as, if black box 302 (such as, outer surface 424a and/or 424b) wearing and tearing, so spacer ring 416 can not engage or slide by valve cage 314 (i.e. the first sealing surfaces 404a), substantially reduce the seal friction between closure member 316 and valve cage 314 thus.In general, because seal ring 416 can not engage valve cage 314 or closure member 316, so black box 302 substantially increases the life-span of seal ring 416.

See Fig. 3 and Fig. 4, in operation, actuator (such as, pneumatic actuator) drives closure member 316 opening completely or moving between peak rate of flow position and operating position away from valve seat 318 with what allow fluid to be flowed by valve 300 at the seating face 328 of closure member 316.When closure member 316 moves between the open and the closed positions, black box 302 is moving up along the side of axis 348 or is sliding.In operating position, closure member 316 sealing engagement valve seat 318 also blocks the opening 324 of valve cage 314, in case fluid is by valve 300 flowing between entrance 308 and outlet 310.

When valve 300 is positioned at operating position, fluid can flow in the gap 402 between closure member 316 and valve cage 314.The anti-fluid of black box 302 described herein is advanced further, and therefore anti-fluid is leaked between valve cage 314 and closure member 316.

Overcoat 420a and 420b of the first Sealing 412 and the second Sealing 414 engages sealing surfaces 404a and 404b.Spring 418a and 418b applies to be carried on overcoat 420a and 420b, with outer surface 424a and 424b of deflection overcoat 420a and 420b near sealing surfaces 404a and 404b, thus achieve and seal closely and prevent the unwanted fluid between valve cage 314 and closure member 316 to leak.Such as, attempt the internal surface 422b being pressed against overcoat 420b from entrance 308 via the fluid that valve 300 leaks between closure member 316 and valve cage 314, pressure support ventilation outer surface 424b is near sealing surfaces 404a and 404b thus.On the contrary, if flow direction is contrary, the fluid attempt to leak between closure member 316 and valve cage 314 via valve 300, being flowed by the pipeline 330 of closure member 316 is pressed against the internal surface 422a of overcoat 420a, and the outer surface of pressure support ventilation overcoat 420a is near sealing surfaces 404a and 404b thus.This action improves the sealing (such as, provide and seal more closely) between closure member 316 and valve cage 314.

Additionally or alternatively, come towards sealing surfaces 404a and 404b deflection overcoat 420a and 420b separately because spring 418a and 418b applies power, spring loads the tolerance that Sealing 412 and 414 allows the relative loose in the processing of valve assembly and assembling and/or the dimensional changes caused by temperature variation.

In operation, spacer ring 416 maintains or keeps the first Sealing 412 and the second Sealing 414 mutually separate and prevent the first Sealing 412 and the second Sealing 414 from contacting with each other.The first Sealing 412 and the second Sealing 414 can not be maintained mutually separate the first Sealing 412 and the second Sealing 414 may be caused to bottle up or block in the gap 402 between valve cage 314 and closure member 316, cause invalid sealing thus.

Fig. 5 shows the enlarged portion of valve 500, and valve 500 implements another exemplary black box 502 described herein.Those assemblies of the exemplary valve 500 of Fig. 5 and those assembly basic simlarity or identical of above-described exemplary valve 300, and have and the function basic simlarity of those assemblies or identical function, be no longer described in detail below.Alternatively, interested reader can with reference to the corresponding description of composition graphs 3 and Fig. 4 above.Those basic simlarity or identical assembly have the reference character identical with those assemblies that Fig. 4 describes with composition graphs 3.

Exemplary valve 500 and exemplary valve 300 basic simlarity in Fig. 3 and Fig. 4.But the closure member 504 of exemplary valve 500 implements floss hole or path 506, and fluid flow passages 306 (see Fig. 3) is couple to black box 502 via pipeline 330 fluid by it.Black box 502 comprises the first Sealing 508 and second Sealing 510 relative with the first Sealing 508.Spacer ring 512 be arranged on the first Sealing 508 and and the second Sealing 510 between, contact with each other to prevent the first Sealing 508 and the second Sealing 510.First Sealing 508 and the second Sealing 510 and Sealing 412,414 basic simlarity or identical in Fig. 3,4, therefore will no longer repeat the description of the first Sealing 508 and the second Sealing 510 for simplicity.

Path 506 makes pressure fluid can flow to black box 502 between passage 422a and 422b.Spacer ring 512 comprises hole or opening 514, flow to towards the path 506 first side 516a relative with the second side 516b to enable pressure fluid.In this way, the opening 514 of path 506 and spacer ring 512 provides the pressure equilibrium of forces of black box 502 both sides, further reduces the friction between valve cage 314 and the first Sealing 508, second Sealing 510 thus when closure member 504 moves between the open and the closed positions.Because the friction between valve cage 314 and closure member 316 reduces, so respective overcoat 420a, 420b of the first Sealing 508, second Sealing 510 and the operating life of spacer ring 512 are significantly increased.

Although be described some device, the coverage area of this patent is not limited to this.On the contrary, to this patent covers on word or rationally to fall into all devices in the scope of claims according to doctrine of equivalents.

Claims (20)

1. for the black box of valve, it is characterized in that, comprising:
First Sealing and second Sealing relative with described first Sealing, described first Sealing is used for the closure member of sealing engagement valve and the sealing surfaces relative with described closure member with described second Sealing; And
Spacer ring, it is arranged between described first Sealing and described second Sealing and prevents described first Sealing and described second Sealing from contacting with each other, described spacer ring has the hole run through from it, moves from the second effluent of the first side of described spacer ring and the described spacer ring relative with described first side to enable pressure fluid.
2. black box according to claim 1, is characterized in that, the size of described spacer ring is configured to described spacer ring and can not contacts described closure member or described sealing surfaces.
3. black box according to claim 1, is characterized in that, each of described first Sealing and described second Sealing comprises chamber.
4. black box according to claim 3, is characterized in that, the chamber of described first Sealing and described second Sealing toward each other.
5. black box according to claim 3, is characterized in that, described spacer ring is arranged in the chamber of described first Sealing and described second Sealing at least partly, contacts with each other to prevent described first Sealing and described second Sealing.
6. black box according to claim 1, is characterized in that, described sealing surfaces comprises the internal surface of valve cage.
7. black box according to claim 1, is characterized in that, described first Sealing or described second Sealing comprise the spring be arranged in overcoat, to promote described overcoat near described sealing surfaces and described closure member.
8. black box according to claim 1, is characterized in that, described spacer ring comprises metal or thermoplastic material.
9. black box according to claim 1, is characterized in that, described closure member comprises valve plug.
10. black box according to claim 1, is characterized in that, also comprises valve body, and described valve body comprises described closure member, and described closure member is arranged in the fluid flow passages of the described valve body between the outlet of described valve body and entrance.
11. black boies according to claim 10, is characterized in that, described closure member comprises floss hole, and described floss hole fluid couples the described fluid flow passages of described valve body and described black box.
12. black boies according to claim 11, is characterized in that, described floss hole can make the pressure balance of described black box both sides, to reduce the friction between described closure member and described sealing surfaces.
13. black boies according to claim 11, is characterized in that, described floss hole is used for the described hole that fluid is communicated with described spacer ring.
14. black boies according to claim 11, it is characterized in that, described closure member is included in the pipeline extended between the first end of described closure member and the second end of described closure member, described pipeline fluid couples the first end of described closure member and the described fluid flow passages of described valve body, with closure member described in pressure balance.
15. black boies according to claim 14, is characterized in that, the axis of described pipeline is basically perpendicular to the axis of described floss hole.
16., for the black box of fluid valve, is characterized in that, comprising:
First Sealing, it has the first leg and the second leg, forms the first chamber between described first leg and described second leg;
Second Sealing, it has the 3rd leg and the 4th leg, forms the second chamber between described 3rd leg and described 4th leg;
Spacer ring, it is arranged between described first Sealing and described second Sealing, in order to maintain described first Sealing and described second Sealing is separated mutually, contact with each other to prevent described first Sealing and described second Sealing, described spacer ring is arranged in described first chamber at least partly, described spacer ring and described first leg is made to limit the first portion of described first chamber, described spacer ring and described second leg limit the second portion of described first chamber, and described spacer ring is arranged in described second chamber at least partly, described spacer ring and described 3rd leg is made to limit the Part III of described second chamber, described spacer ring and described 4th leg limit the Part IV of described second chamber, described spacer ring comprises hole, to enable pressure fluid in described first chamber and the respective first portion of described second chamber and to flow between the respective second portion of Part III and described first chamber and described second chamber and Part IV.
17. black boies according to claim 15, is characterized in that, the size of described spacer ring is configured to can not contact valve cage or valve plug when described black box is disposed in valve body.
18. black boies according to claim 15, is characterized in that, described first Sealing and described second Sealing are that spring loads Sealing.
19. black boies according to claim 15, is characterized in that, described black box also comprises the support ring of contiguous described first Sealing and described second Sealing and the piston ring of contiguous described support ring.
20., for the black box of valve, is characterized in that, comprising:
First seal arrangement and second seal arrangement relative with described first seal arrangement, described first seal arrangement is used for the closure member of sealing engagement valve and the sealing surfaces relative with described closure member with described second seal arrangement; And
Separating device, it is for separating described first seal arrangement and described second seal arrangement, contact with each other to prevent described first seal arrangement and described second seal arrangement, the size of described separating device is configured to make described separating device can not contact described closure member or described sealing surfaces, and described separating device comprises the device for allowing fluid to flow between the first side of described separating device and the second side of the described separating device relative with the first side of described separating device via described separating device.
CN201510117515.4A 2009-04-28 2015-03-17 Bi-Directional Seal Assembly For Use With Valves CN104930207A (en)

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US14/217,791 US10054227B2 (en) 2009-04-28 2014-03-18 Bi-directional seal assembly for use with valves
US14/217,791 2014-03-18

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CN201520152103.XU CN204647361U (en) 2009-04-28 2015-03-17 For the black box of valve

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CA (1) CA2942505A1 (en)
RU (1) RU2016139968A3 (en)
WO (1) WO2015142977A1 (en)

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CN107044544A (en) * 2015-11-04 2017-08-15 费希尔控制产品国际有限公司 Component for the fluid flow control device progress startup test under each pressure and temperature
CN107044544B (en) * 2015-11-04 2020-12-22 费希尔控制产品国际有限公司 Assembly for start-up testing of fluid flow control devices at various pressures and temperatures

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CN104930207A (en) * 2014-03-18 2015-09-23 费希尔控制国际公司 Bi-Directional Seal Assembly For Use With Valves
US8714560B2 (en) 2009-04-28 2014-05-06 Fisher Controls International Llc Bidirectional seal assembly for use with valves
EP3193066A1 (en) * 2016-01-15 2017-07-19 Danfoss A/S Valve, in particular heat exchanger valve

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CN102449367A (en) * 2009-05-28 2012-05-09 费希尔控制国际公司 Valve trim apparatus for use with valves
CN103097785A (en) * 2010-07-30 2013-05-08 费希尔控制国际公司 Valve seat apparatus for use with fluid valves
CN204647361U (en) * 2014-03-18 2015-09-16 费希尔控制国际公司 For the black box of valve

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CN101910698A (en) * 2008-01-11 2010-12-08 费希尔控制国际公司 Seal assembly for use with valves having a two-piece cage
WO2010126671A1 (en) * 2009-04-28 2010-11-04 Fisher Controls International Llc Bidirectional seal assembly for use with valves
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CN107044544A (en) * 2015-11-04 2017-08-15 费希尔控制产品国际有限公司 Component for the fluid flow control device progress startup test under each pressure and temperature
CN107044544B (en) * 2015-11-04 2020-12-22 费希尔控制产品国际有限公司 Assembly for start-up testing of fluid flow control devices at various pressures and temperatures

Also Published As

Publication number Publication date
RU2016139968A (en) 2018-04-20
CN204647361U (en) 2015-09-16
EP3120062A1 (en) 2017-01-25
WO2015142977A1 (en) 2015-09-24
RU2016139968A3 (en) 2018-10-29
CA2942505A1 (en) 2015-09-24

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