CN107002903A - Combined type diaphragm piston actuator - Google Patents

Abstract

A kind of device for being used to activate valve includes the actuator with lid.The plate for engaging the internal diameter of actuator casing is positioned in actuator casing.Pressure chamber is located in actuator casing between Ban Hegai.The pressure chamber of lid seal fluidly between closure and actuator casing.Pressure chamber is fluidly sealed at plate by one in the first plate seal assemblies and the second plate seal assemblies.First plate seal assemblies are formed by the barrier film being fixed between sealing nut and plate.Second plate seal assemblies are by outside diameter wall seal and keep seal to be formed, and outside diameter wall seal is located between the internal diameter of actuator casing and the external diameter of plate, and keep seal to be located between the external diameter of sealing nut and the internal diameter of plate.

Description

Combined type diaphragm piston actuator

The cross reference of related application

This application requires entitled " U.S. of Non Tension Diaphragm " CO-PENDING that September in 2014 is submitted on the 12nd State provisional application No. 62/049539 priority and rights and interests, the complete disclosure of this application is incorporated by reference into herein herein In.

This application is also the continuation application of following application, and requires following priority application and rights and interests：2012 11 The moon " Combination Diaphragm Piston Actuator " U.S. Patent application No. submit, entitled on the 16th 13/679,553, it is now United States Patent (USP) No. 8,998,166；It is entitled that " the Non-Rising Stem Actuator " U.S. is special Profit application No. 14/107,589, is now United States Patent (USP) No. 8,991,420, it requires the U.S. submitted on December 31st, 2012 Temporary patent application No. 61/747,753 priority and rights and interests；And entitled " Quick Connect Valve Actuator " U.S. Patent application No. 13/832,884, it requires " Quick submit, entitled on December 31st, 2012 Connect Valve Actuator " U.S. Provisional Patent Application No. 61/747,479 priority and rights and interests；Each Shen Complete disclosure please is incorporated by reference into herein.

Technical field

The present invention discloses the valve related generally to for mineral recovery well, and is specifically related to used for activating the cause of valve Dynamic device.

Background technology

Gate valve (gate valve) is the valve of the hole with main body and through the main body.Lock transverse to agent localization, And be moved linearly by with block through hole stream or allow stream pass through the hole.Some locks have the hole with hole aligning Mouthful with allow flowing.Lock can be normally opened, and be closed when therefore lock promotes aperture being moved linearly with hole misalignment Close.Alternatively, lock can be normally closed, and therefore lock is beaten when being moved linearly and aperture being positioned to hole aligning Open.Pipe closer is not normally opened or normally closed, and lock is moved or activated by valve actuator.

Actuator can be that hydraulic pressure, piston-type actuator, or actuator can be that air rammer or diaphragm type are caused Dynamic device.In conventional separator type actuator, barrier film is in response to pressure medium (such as gas or other streams to gate valve promotion barrier film Body) and move.Barrier film is supported by supporting plate.As applicatory, when barrier film is pushed down on pressure medium, barrier film is downward Supporting plate is promoted, supporting plate then passes to downward power via bar at the lock of gate valve, to open or close the gate valve.

In some existing diaphragm actuators, the external diameter of diaphragm support plate is not extend to the housing that barrier film is positioned in Internal diameter so that a part for barrier film is suspended on the edge of supporting plate, and is not supported thus.Such as people in the art Member it will be understood that, the region that barrier film is not supported is easier failure, and need thickness and enhanced barrier film, so as to Bear the power applied by pressure medium.

In some actuators, indicating arm projects through the lid of the housing of typical valve actuator.Indicating arm is sealing A part for nut assembly, sealing nut component is upwardly extended from the plate in valve actuator housing, or is connected by screw thread It is connected on the top surface of plate.Indicating arm sealing nut sealingly engages the hole of plate.Can between indicating arm sealing nut and plate Leak.In having septate air-driven type actuator, sealing nut must be removed to change barrier film.

In some cases, actuator can manually be activated by being pressed against indicating arm.But, the power on bar can damage bar Or the internal part of actuator.Desirably actuator can be damaged from externally actuated valve without applying on bar Power.It is also contemplated that can remove and change the bar without destroying the seal between sealing nut and plate or barrier film.

The content of the invention

This application disclose the embodiment of valve actuator, valve actuator can alternatively be configured to be used as membrane activated Device, piston actuater or dual or composite membrane and piston actuater.In various embodiments, actuator includes being used in Modular member in the one or more patterns used of actuator；It can for different sizes or construction part it is mutual Change；And/or it relative from the part of different sizes or construction can connect.The embodiments herein provide significant performance, manufacture, Assembling, cost and other benefit, it is all as described below.

More specifically, in embodiment, valve actuator is the operated pneumatic valve that can be used for activating valve (such as gate valve) Actuator.The valve actuator, which can be configured to, uses barrier film；Or piston pressure；Or both barrier film and piston pressure.Herein Embodiment allow manufacture can be used in multiple pneumatic actuators apply in universal actuator part.In addition, embodiment is to operation Person provides and activates the flexibility of valve using barrier film, piston or double containment actuator.

This presently disclosed alternative system and method are provided without elevating lever barrier film or piston actuater.Such embodiment does not have Have through the prominent apical axis of the lid of actuator.Index axle (indicator shaft) is instead provided, it contains from the nothing of actuator Laminate section is protruded, and reduces the risk of seal fails.In addition, presently disclosed system and method include working as actuator pressure Medium can be with the index axle of the removal of limiting actuator when pressurizeing.

The barrier film of the embodiment of this disclosure of the invention will resist undesirable abrasion during use, cause the service life of barrier film Extension.Barrier film can resist abrasion, such as by being completely supported in actuator, by extending during actuation process and receiving Contract and be not exposed to sufficient tension force and get off to cause barrier film expansion or stretch, and by the region of potential failure is related to With additional material.

In an embodiment of the present disclosure, a kind of device for being used to activate valve includes actuator casing, the actuating Device housing has valve end, lid end and limits the side wall of the internal diameter of actuator casing.Lid is connected to the lid end of actuator casing On.Plate is positioned in actuator casing, and the plate has core and is sliding engaged the external diameter of the internal diameter of actuator casing.Pressure Power chamber is positioned in actuator casing between Ban Hegai, and the plate is prolonging in response to the pressure medium being injected into pressure chamber Stretch and moved between position and retracted position.The plate is in extended position ratio in retracted position closer to valve end.Sealing nut is connected On the plate, sealing nut is operable to the central opening of interface membrane.Lid seal fluidly closure and actuator casing Between pressure chamber.Pressure chamber at plate by one in the first plate seal assemblies and the second plate seal assemblies fluidly Sealing.First plate seal assemblies are formed by the barrier film being fixed between sealing nut and plate.Second seal assembly is by outside diameter wall Seal and holding seal are formed, and outside diameter wall seal is located between the internal diameter of actuator casing and the external diameter of plate, and protects Seal is held between the external diameter of sealing nut and the internal diameter of plate.

In presently disclosed alternative, a kind of device for being used to activate valve includes actuator casing, the actuating Device housing has valve end, lid end and limits the side wall of the internal diameter of actuator casing.Lid is connected to the lid end of actuator casing On.Plate is positioned in actuator casing, and the plate has core and is sliding engaged the external diameter of the internal diameter of actuator casing.The One pressure chamber and second pressure chamber are located in actuator casing between Ban Hegai.First pressure chamber includes being supported by plate Barrier film.Second pressure chamber is limited by plate, actuator casing and lid, and second pressure chamber has plate seal assemblies, and the plate is close Sealing assembly includes the outside diameter wall seal between the internal diameter of actuator casing and the external diameter of plate.By first pressure chamber and The region of at least one Fluid Sealing formed between lid and plate in second pressure chamber, and plate is in response to injecting the fluid The pressure medium in sealed region is moved between plate raised position and plate extended position, plate on plate extended position ratio in plate liter Rise on position closer to valve end.

Brief description of the drawings

By reference to the embodiments of the invention illustrated in the accompanying drawings, obtain and can understand wherein of the invention in more detail Feature, benefit and target and will become apparent other guide, can possess summarize briefly above it is of the invention more Specific description, embodiment is illustrated in the accompanying drawings, a part of these figures into this specification.It should be noted that figure Shape illustrate only the preferred embodiments of the present invention, and therefore be not to be construed as limiting its scope, because the present invention can approve other Equally effective embodiment.

Fig. 1 is that the lateral section of the embodiment of the double sealing piston diaphragm actuators according to the embodiment of this disclosure of the invention is regarded Figure, shows the plate in plate raised position.

Fig. 2 is the amplification detailed view of Fig. 1 double sealing piston diaphragm actuators.

Fig. 3 is the side sectional view of Fig. 1 double sealing piston diaphragm actuators, shows the plate in plate extended position.

Fig. 4 is the side sectional view of the double sealing piston diaphragm actuators according to the embodiment of this disclosure of the invention, is shown The barrier film of rupture and the outside diameter wall seal of seal pressure chamber, and also show single-piece supporting plate.

Fig. 5 is the side sectional view of Fig. 4 double sealing piston diaphragm actuators, show the replacing of seal pressure chamber every Film.

Fig. 6 is the lateral section detailed view of the double sealing piston diaphragm actuators according to the embodiment of this disclosure of the invention, rotation Adapter.

Fig. 7 is that the side of the double sealing piston diaphragm actuators with non-elevating lever of the embodiment according to this disclosure of the invention is cut Face view, to be shown in plate extended position.

Fig. 8 A are the amplification side sectional views of the quick connection of Fig. 7 double sealing piston diaphragm actuators.

Fig. 8 B are the perspective views of the spin locking system of Fig. 7 double sealing piston diaphragm actuators.

Fig. 9 A-9C are the side sectional views of the barrier film of the embodiment according to this disclosure of the invention.

Embodiment

System and method disclosed by the invention will be described more fully hereinafter with reference to the accompanying drawings below now, accompanying drawing illustrates this hair Bright embodiment.However, the system and method for this disclosure of the invention can be embodied in many different forms and be not construed as It is limited to diagram embodiment set forth herein.On the contrary, these embodiments are provided so that this disclosure of the invention will be detailed and complete, and And comprehensively will pass on the scope of the present invention to those skilled in the art.Throughout similar label refers to similar element, and And main symbol (if using) indicates the similar components in alternative.

With reference to Fig. 1, actuator 100 is shown.Actuator 100 is connected thereto for being turned on or off actuator 100 Valve 102.As the skilled person will appreciate, valve 102 can activate for gate valve or by the extension of linear structure Any other type valve.Valve 102 can for example be contacted with the wellhead component being arranged on well.Wellhead component may include well Production tree and the pipeline being connected on the tree or the wellhead component above mouth housing, housing.Pipeline and wellhead component may include The embodiment of valve 102 as described herein.Valve 102, which also can be used to adjust, specifies to enter the fluid of wellhead component.Valve 102 It can be used in low temperature or be otherwise used in harsh environment.Bonnet 104 is connected in the main body of valve 102.Valve rod 106 passes through valve Lid 104 and packing guard ring 108.Actuator 100 is used to activate valve 102 by promoting valve rod 106 downwardly toward valve 102. Bonnet 104 and valve 102 are sealed, to prevent fluid from valve 102 to the flowing of actuator 100.

Actuator casing 112 includes the cylinder-shaped body with inside diameter surface 114.Housing 112 is by multiple technologies (including example As punching press, extruding and cast) any one be made.In embodiment, inner surface of the housing 112 in such as inside diameter surface 114 Upper no solder joint or seam.Housing 112 can be made up of NACE authentication materials.

In the embodiment in figure 1, the valve end of actuator casing 112 is connected on bonnet 104 by screw thread 116.In figure In 7-8A alternative, the valve end of actuator casing 112 is connected on bonnet 104 by bonnet connector 118.Housing 112 lower end includes the opening limited by connector internal diameter 120.Housing journal stirrup 122 from connector internal diameter 120 it is inwardly projecting and Separated around connector internal diameter 120, to limit the housing line of rabbet joint 124 therebetween.

Fig. 7-8A are still seen, bonnet 104 includes the lower flange 126 radially extended from bonnet main body 128.Lower flange 126 is wrapped Include bolt hole 132.Bonnet 104 can be connected in the main body of valve 102 by bolt 130 by bolt hole 132.In lower flange At the opposite end of 126 bonnet 104, lock flange 134 is from bonnet main body 128 radially and including top surface 136.Lock The external diameter for determining flange 134 is less than or is substantially equal to connector internal diameter 120 so that connector internal diameter 120 may be mounted at locking On flange 134.

Groove 138 is the annular groove in the external diameter of lock flange 134.The lower wall of groove 138 is limited upwardly Shoulder 140.38 width of groove is more than or is substantially equal to the axial length of housing journal stirrup 122, the width foundation of groove 138 Limited along the axial length of the axis of bonnet 104.The diameter of groove rear wall 142 is less than or is substantially equal to by housing journal stirrup 122 internal diameters limited so that housing journal stirrup 122 may be mounted in groove 138.

The line of rabbet joint 144 is the axial slots in the external diameter of lock flange 134, and it extends to groove 138 from top surface 136. Multiple lines of rabbet joint 144 are separated around the circumference of lock flange 134, to limit bonnet journal stirrup 146 therebetween.The footpath of each line of rabbet joint 144 The radial depth of groove 138 is typically less than or equal to depth, but the radial direction that can be alternatively greater than groove 138 is deep Degree.The circumferential arc length of each line of rabbet joint 144 is substantially equal to or more than the circumferential arc length of each housing journal stirrup 122.Shell Body journal stirrup 122 thus can axially pass through the line of rabbet joint 144.

After the line of rabbet joint 144, housing journal stirrup 122 is positioned in groove 138 under bonnet journal stirrup 146, but works as housing 112 are not axially aligned with when being on off-position with bonnet journal stirrup 146, the contact shoulder 140 of housing journal stirrup 122, so as to enter one Step stops the moving downward relative to bonnet 104 of housing 112.Because housing journal stirrup 122 is axially under bonnet journal stirrup 146, shell Body 112 can rotate relative to bonnet 104.When housing 112 is rotated to wherein relative to bonnet 104, bonnet journal stirrup 146 is axially At the position of the top of housing journal stirrup 122, housing 112 is in the locked position.In the locking position, bonnet journal stirrup 146 prevents shell The axially upwardly motion of body journal stirrup 118.In embodiment, it is necessary to housing 112 less than a circle revolution by housing 112 from release Position is moved to latched position.In certain embodiments, depending on the size and number of journal stirrup, housing 112 is removable as little as, 1/3,1/6,1/8,1/10 or 1/16 circle turns round to be moved in latched position from off-position.

As the skilled person will appreciate, the fluid not from valve 102 is in bonnet journal stirrup 146 and housing branch Near ear 122, and therefore can be without seal between the lower end of housing 112 and the upper end of bonnet 104.Therefore, in reality Apply in example, if any fluid is present in the lower end of housing 112, at least a portion of the fluid can pass through by connector What internal diameter 120 was limited is open and flows to the region in the outside of housing 112 and the outside of bonnet 104.In embodiment, exist in fluid Actuator casing 112 can be removed from bonnet 104 when in valve 102, and no fluid will be through bonnet 104 or with it His mode flows out valve 102.In other alternatives, other kinds of connector, such as bolt can be used.

With reference to Fig. 8 B, when housing 112 is in the locked position, rotation lock 148 can prevent housing 112 relative to bonnet 104 rotation.Rotation lock 148 includes latch body 150, and latch body 150 has when latch body is positioned at breech lock aperture 154 By its inwardly projecting one or more latch tab 152 when middle.Breech lock aperture 154 is opening through the side wall of housing 112 Mouthful.In embodiment, seal is not required at aperture 154, because there is no pressurized stream at aperture 155 in housing 112 Body.In fact, in embodiment, there is no seal between aperture 154 and latch body 150.Latch body 150 passes through pin 156 are pivotally connected on housing 112, and pin 156 is by the lateral hole of housing 112 or the hole of intersection drilling.Latch body 150 pivot on pin 156 between non-blocked position and locked position of coupler.Ratchet 158 is from the side of latch body 150 or two The spring-loaded plunger that side is protruded.Ratchet 158 engages the lateral hole 160 of housing 112 optionally to prevent latch body 150 pivot relative to housing 112.When latch body 150 is radially outward pivoted from housing 112, on non-blocked position, ratchet 158 contact the external diameter surface of housings 112 to prevent latch body 150 from pivoting to locked position of coupler to interior.Such as those skilled in the art It will be understood that, other mechanisms can be used to be held in place latch body 150.

Latch tab 152 also includes tab side wall 162.Latch tab 152 is positioned at housing journal stirrup 122 in housing 112 Just above so that when housing 112 falls on bonnet 104 at least a portion of latch tab 152 with bonnet journal stirrup 146 in phase On same axial location.

In embodiment, spring (not shown) can radially-inwardly biased latch main body 150.When housing 112 is placed on valve When on lid 104, the top edge (Fig. 8 A) of a part (such as bottom 164) the contact bonnet journal stirrup 146 of latch tab 152, thus Radially outward deflect latch tab 152.The edge of bottom 164 can have taper in order to such deflection.In latch tab 152 In the case that housing 112 is located radially outward, on non-blocked position, housing journal stirrup 122 falls on shoulder 140 and housing 112 are rotated into latched position.Latch tab 152 is maintained at radially outward, on non-blocked position by ratchet 158.Then operate Person, which presses ratchet 158 and carrys out latch enable tab 152, is inwardly switched to locked position of coupler.

When latch tab 152 is pivoted to the position that ratchet 158 aligns with lateral hole 160, a part of quilt of ratchet 158 Contained spring (not shown) is pushed in lateral hole 160.On this locked position of coupler, ratchet 158 engages lateral hole 160, with Latch tab 152 is maintained on locked position of coupler, and thus prevents latch tab 152 to be moved to non-blocked position.Closed at this In lock position, the side wall 166 of the engagement bonnet of latch tab side wall 162 journal stirrup 146, therefore prevent housing 112 relative to bonnet Further rotating in 104 either direction.The outer surface 168 of latch tab 152 can be special-shaped, with substantially matching shell The radius of the external diameter profile of body 112.Alternatively, the outer surface 168 of latch tab 152 can be plane.Other can be used The rotation lock 148 of type.For example, pin (not shown) can be inserted to the hole of bonnet 104 through the aperture (not shown) of housing 112 Hole (not shown).Or different types of bolt lock mechanism can be used.

Fig. 1 is seen again, and the lid end of housing 112 is located at the opposite end with bonnet connector 118 of housing 112.Housing is convex Edge 170 is located at the lid end of housing 112.Casing ledge 170 is flared out from housing 112.Casing ledge 170 has upwardly Surface 172, the surface 172 is to be used to form sealed smooth surface.Multiple bolts hole 174 can be separated around flange 170.

Lid 176 is connected on housing 112.Lid 176 is the ring of the external diameter with the external diameter for being substantially equal to casing ledge 170 Shape plate.Surface 178 downwards be the lid 176 that is alignd with the surface 172 upwardly of casing ledge 170 it is substantially smooth, Surface downwards.Multiple bolts hole 180 separate to align with bolt hole 174 around lid 176.Bonnet bolt 182 is passed through bolt Hole 174 and bolt hole 180 and fixed with nut.It can use other constructions that lid 176 is fixed on housing 112, it is all Bolt hole 174 is such as inserted through to be threadably engaged the bolt that lid 176 is fixed to (not shown) on housing 112 by bolt hole 180, Bolt hole 180 is inserted through to be threadably engaged the (not shown) of bolt hole 170, clip (not shown), packing ring (not shown) or card The bolt of mouth seat (not shown).It is not bolt hole 174,180 and bonnet bolt 182 as an example, in Fig. 4 alternative, But a series of lid tabs 184 and housing tab 186, they interact so that lid 176 can be positioned in actuator casing On 112, and bonnet 176 can by make lid 176 rotated between release and latched position less than a complete circle and from Off-position is rotated to latched position.

Entrance 188 is the aperture inwardly separated through lid 176 and with surface 178 downwards.Entrance 188 is connected to On pressure medium fluid source (not shown), fluid source optionally can provide pressure medium fluid through entrance 188.Pressurization is situated between Matter is typically the fluid of such as compressed air, nitrogen, well head gas or other kinds of gas or liquid.Such as art technology Personnel will be understood that, in embodiment, can use other aperture and other aperture is connected into pipeline or pressure In power release device.As an example, aperture 190 is the second opening through lid 176.Device 192 shown in aperture 190 can be with It is pressure relief device, if pressure exceedes predetermined value, the pressure relief device will be opened to discharge the pressure in housing 112 Power.As the skilled person will appreciate, device 192 can be for slowing down wherein the one of a variety of devices of superpressure situation Kind, such as relief valve, rupture pressure disc or Controlled valve.Alternatively, device 192 can be caused for optionally introducing sealant The sealant injection port of dynamic device housing 112.

Fig. 2 is turned to, plate 194 is the annular slab being located in housing 112.Plate 194 is typically normal to the central axis of housing 112 196.Plate 194 can across housing 112 internal diameter and slidably or sealingly engage the inside diameter surface 114 of housing 112.Plate 194 include center hole 198.The surface upwardly of plate 194 be plate 194 on the pressure side.Plate 194 can be single, monomer Plate (Fig. 4), or hub 200 and outside plate 202 can be included.Center hole 198 has internal diameter whorl 204 on inside diameter surface. In embodiment including hub 200, hub 200 has center hole 198.Hub 200 is additionally included in close on the internal diameter of center hole 198 Seal surface.The external diameter of hub 200 includes outer-diameter threads 206 and outside diameter seal surface 208.

Outside plate 202 is attached to the annular ring on hub 200 so that plate 194 includes outside plate 202 and hub 200.Outside plate 202 (or Person is if being exactly plate 194 without outside plate 202) upper surface 210 tilt down and out, with overall prominent shape, And inside diameter surface 114 is extended horizontally to afterwards.In other embodiments, the upper surface 210 of outside plate 202 can be flatly Extend to before inside diameter surface 114 and tilt upwardly and outwardly, can be either flat surfaces or can have combination tilt and The alternative shape of flat.The surface of plate 194 can have abnormal shape so that radially outer part is axially radially-inwardly Beneath portions, or cause radially outward portion axially above radially-inwardly part (not shown).In other embodiments, The surface of plate 194 can be flat.As shown in fig. 1, the outer diameter zone of plate be positioned to than plate core axially more Close to the valve end of housing.In embodiment, plate 194 has protrusion surface upwardly and sunk surface upwardly.Depression Surface can radially outwardly be separated with prominent surface, or alternatively, radially inwardly be separated with prominent surface.In other realities Apply in example, plate 194 there can be the surface of general planar, or there can be the group of special-shaped projection, depression or flat Close.

The internal diameter hole of outside plate 202 includes being used to be threadably engaged the internal diameter whorl 212 of the outer-diameter threads 206 of hub 200. Keep in the sealed groove 216 that seal 214 is located on the hole of outside plate 202, and sealingly engage the outside diameter seal table of hub 200 Face 208.Side wall seal 218 is located in groove 220, and groove 220 is positioned on the external diameter of outside plate 202, and is therefore positioned at On the external diameter of plate 194.Side wall seal 218 sealingly engages the inside diameter surface 114 of housing 112 to provide the He of inside diameter surface 114 Dynamic sealing between plate 194.In embodiment, wear ring (not shown) can be positioned in groove 220.Such as art technology Personnel will be understood that, wear ring is by the friction between the external diameter and the inside diameter surface 114 of housing 112 that reduce plate 194.Wear ring Without with the identical of side wall seal 218 seal attribute.

Indicator housing 222 is to include being used to receive the housing of the telltale holes 224 of indicating arm 226.Indicating arm 226 is to wear Cross the cylindrical shaft of the protrusion of lid 176.Bearing 228 is the bearing table for being used on the internal diameter of telltale holes 224 guiding indicating arm 226 Face.Seal assembly 230 is to surround the dynamically sealed seal of indicating arm 226.As the skilled person will appreciate, it is close Sealing assembly 230 can include snap ring 232 or other retainer (not shown), by seal assembly 230 in indicator housing 222 In be held in place.Alternatively, seal assembly 230 can be seal box, the V-arrangement lip seal with O-ring or for around Axle dynamically sealedly other kinds of seal.In an alternative embodiment, in such as Fig. 7 embodiment, lid 176 is not indicated Device housing 222 and the indicating arm 226 for being not passed through the protrusion of lid 176.

Fig. 2 and Fig. 6 are seen, sealing nut 234 is detachably connected on the center of plate 194.Sealing nut 234 includes circle Cylindrical bodies 236.Screw thread 238 is threadably engaged the outer-diameter threads 204 of hub 200 on the external diameter of main body 236.Sealing Nut 234 includes seal 240, and seal 240 is axially positioned on the external diameter surface of main body 236 in the top of screw thread 238 In sealed groove 242, to sealingly engage the center hole 198 of hub 200.Alternatively, main body 236 and plate 194 internal diameter it Between can be without seal.

In the exemplary embodiment in figure 2, sealing nut 234 is integrally formed with indicating arm 226.Implement in Fig. 6 example In example, indicating arm 226 is single component and is releasably secured on sealing nut 234.In such embodiments, on Portion's main body 244 is sealing nut 234 in sealing nut 234 and the cylindrical part on the opposite end of screw thread 238.Upper body 244 have end surfaces 246.When plate 194 is on higher position, end surfaces 246 can close or engagement lid 176 inner surface 248.Locking radial ring groove 250 can be positioned on the external diameter of upper body 244.

Fig. 2 and Fig. 6 are seen, shoulder 252 is the shoulder radially extended from the external diameter of the main body 236 of sealing nut 234.Shoulder 252 are axially located at the top of sealed groove 242.The external diameter of shoulder 252 is more than the internal diameter of hole 198 so that shoulder 252 is radially The part on the surface upwardly of overlapping plates 194.Shoulder 252 includes surface 254 downwards, when sealing nut 234 is installed When in plate 194, the surface 254 is towards plate 194.Nut lip 156 is axially downwardly projected from surface 254, close to shoulder 252 Edge.

In Fig. 6 example embodiment, locking ring groove 250 is annular recessed on the external diameter surface of upper body 244 Groove, on shoulder 252.Tool socket 258 is, for receiving the hexagon of inner hexagon spanner to be recessed, and can be located at end surfaces On 246.Other technologies can be used to tighten sealing nut 234.Hole 260 be in the lower end of main body 236 downwards Cylindrical depression.Indicating arm 226 is releasably coupled on sealing nut 234.Indicating arm 226 includes being connected to base portion 264 On axle 262.Axle 262 is the cylindrical shaft for extending up through lid 176, and sealingly engaged by seal assembly 230.Base portion 264 be the cylindrical base of the external diameter of the external diameter with more than axle 262.Base portion depression 266 be in the lower end of base portion 264 with axle 262 relative cylindrical cavities.Beveling 274 is the surface of the taper at the mouth of depression 266 inwardly and downwards.Depression 266 internal diameter is more than or is substantially equal to the external diameter of upper body 244.Base portion 264 thus can be concentrically positioned in top master On body 244 so that the engaging recess 266 of upper body 244.

Groove 268 is the annular groove of the inside diameter surface extension around depression 266.Aperture 270 is through the side of base portion 264 The aperture that wall radially and with the bottom of groove 268 intersects.One or more apertures 270 surround the circle of base portion 264 Week separates.Locking ring 272 is elastic locking ring, and it is positioned at least one that occupies each locking ring groove 250 and groove 268 Point.Locking ring 272 for example can be c shape rings.Under its relaxation state, locking ring 272 has the external diameter less than upper body 244 Internal diameter, and the external diameter more than upper body 244 external diameter.It is defined to the width of the locking ring 272 of the axial length of cyclic rings Degree is less than or is substantially equal to the width of each groove 250 and 268.

In the example for the component of operation, on the snap engagement of locking ring 272 to groove 250.Indicating arm 226 is then logical Crossing makes base portion 264 slide into upper body 244 and be connected on sealing nut 234.As depression 266 slips into upper body 244, locking ring 272 is inwardly pressed into groove 250 by beveling 274.When groove 268 and groove 250 are axially aligned with, locking ring 272 can outwards expand and engage each of groove 250 and groove 268.Locking ring 272 thus prevents the phase of indicating arm 226 For the axial movement of sealing nut 234.In order to remove indicating arm 226 from sealing nut 234, instrument or multiple instruments are passed through Aperture 270 is inserted and for locking ring 272 is pressed into groove 250.When the external diameter that locking ring 272 is depressed into locking ring 272 is small When the point of the internal diameter of groove 268, indicating arm 226 can skid off upper body 244.

In Fig. 7 example embodiment, without indicating arm 226.Lid 176 includes feeling relieved around central axis 196 and not The lid depression 276 extended through lid 176.When plate 194 is on plate raised position, the end surfaces 246 of upper body 244 can be with In lid depression 276.If the lid 176 shown in Fig. 7 is substituted with the lid 176 for including indicator housing 222, sealing nut 234 can still have groove 250 so that can add indicating arm 226.In an alternative embodiment, aperture (not shown) can position In the center of lid 176.Aperture (not shown) can be clogged with connector (not shown), to prevent pressure medium through the aperture (not Show) effusion.The situation of the indicating arm of rising (its such as can for push down on plate 194) upwards is desirable in operator Under, connector (not shown) and the aperture (not shown) that will can be indicated in rod shell (not shown) insertion lid 176 can be removed. Indicating arm such as can be connected on plate 194 by groove 250 by the way that bar (not shown) is connected on sealing nut 234. Indicate that rod shell (not shown) can slidingly and sealingly engage bar (not shown).

Fig. 7 and Fig. 8 B example embodiment is seen, the indicating arm 226 of the position without indicator board 194, but rather indicate that device assembly 278 can be with the position of indicator board 194.Indicator housing 280 is the cylindrical housings being located in indicator aperture 282.Indicator Aperture 282 is the opening in the surface downwards of actuator casing 112, axially under a part for plate 194.Indicator Housing 280 has the shape of substantial cylindrical, the connector on external diameter surface with such as screw thread.Indicator housing 280 Including the cylindrical cavity passed through.Annular shoulder at the lower end of indicator housing 280 defines the internal diameter of reduction.

Position instruction bar 284 is the cylindrical shaft that the aperture limited from the shoulder by indicator housing 280 is protruded.As from The rib for the annular shoulder that the external diameter of position indicator 284 is protruded is with big with the internal diameter of the cylindrical cavity of indicator housing 280 Identical or slightly smaller external diameter is caused, but the annular shoulder that the external diameter of rib is more than at the lower end in indicator housing 280 is limited Aperture internal diameter.Part of the position instruction bar 284 above rib is defined as connector end 286.Connector end 286 can be Smooth, with screw thread, or with other features for being conveniently attached to another component.

Indicator shaft 288 is the cylindrical shaft on the surface downwards that plate 194 is extended to from position instruction bar 284.Plate 194 Surface downwards be plate 194 indicator side a part, its on the pressure side relative with plate 194 and towards housing 112 Valve end.The upper end of indicator shaft 288 can be contacted with the surface downwards of plate 194, but be not connected on plate 194.When When plate 194 is on plate raised position, the upper end of indicator bar 288 is in plate 194 times and not contact plate 194.

Spring can be a part of concentric with position instruction bar 284.The lower end of spring is with shoulder in indicator housing 280 Contacted at lower end.The upper end of spring is contacted with the rib of the external diameter protrusion from position instruction bar 284.Spring pushes up position instruction Bar 284, position instruction bar 284 then pushes up indicator shaft 288, until the surface downwards of the contact plate 194 of axle 288. When actuator 100 is activated and plate 194 is moved to plate extended position from plate raised position, position instruction bar 284 is by referring to Show that device axle 188 is pushed down.Position instruction bar 284 protrudes more in plate raised position in plate extended position ratio from housing 112. When plate 194 moves back up plate raised position, spring pushes up indicator bar 284, to the indicator bar contacted with plate 194 288 degree allowed.

As shown in Figure 7, when plate 194 is in plate extended position and position instruction bar 284 is protruded from actuator casing 112 When, a part of of position instruction bar 284 can position and axially right with rotation lock 148 radially outward from rotation lock 148 Together.On such position, position instruction bar 284 prevents rotation lock 148 to be moved to non-blocked position.When being pivoted out, door bolt Lock main body 150 will bang into position instruction bar 284, so as to prevent latch body 150 to be in non-blocked position.Alternatively, when plate 194 When not on plate raised position, position instruction bar 284 is hindered close to rotation lock 148.Therefore, when plate 194 is in plate extended position When upper, position instruction bar 284 can be used to prevent or prevent to open rotation lock 148.On plate raised position, position indicator 284 do not prevent close to or hinder rotation lock 148.When plate 194 is on plate raised position, the lower end axle of position instruction bar 284 To ground in the top of rotation lock 148.

Because aperture 282 passes through the lower end of housing 112, the pressure chamber of aperture 282 and actuator 100 separate and not with It is connected.The lower end of the housing 112 of the lower section of plate 194 can for example be located at atmosheric pressure, and can have when plate 194 is downward The port (not shown) of air is discharged when mobile.Therefore, position instruction bar 284 does not produce leakage paths, and wherein pressure medium can To be escaped from actuator 100.For the reduction for the dynamic sealing quantity for remaining actuated the pressure medium in device 100, Huo Zhedong The elimination of state seal, it is meant that leakage is less likely to occur.

Fig. 1 is seen, lower retainer 290 is the cylindrical member of the axial force between transmission plate 194 and valve rod 106.Under Retainer 290 includes cylinder-shaped body 292 and the shoulder 294 by its extension.The surface contact plate 194 upwardly of shoulder 294 Surface downwards.Pipe nipple 296 extends from the top axial of lower retainer 290.When actuator 100 is assembled, pipe nipple 296 can be positioned in hole 260 (Fig. 6), so that two components are aligned with one heart.

The lower end of lower retainer 290 includes screw thread hole 298, and it has screw thread on inside diameter surface, for passing through screw thread Engage the end of thread of valve rod 106.As the skilled person will appreciate, the connection between lower retainer 290 and valve rod 106 It can be any kind of connection and be not limited to threaded connection.The external diameter of the lower end of lower retainer 290 includes threaded insert 300 And it may include any amount of spacer ring 302.Another component of the contact of threaded insert 300 at the lower end of housing 112 is (all Such as seal retainer 108), to stop further travelling downwardly for lower retainer 290.Adjustment threaded insert 300 cause its stop to Lower movement, and thus at valve rod 106 in position to open or completely close valve 102 completely.Can add or Person removes spacer ring 302 so that the unlatching of the lock (not shown) of gate valve 102 and the passage (not shown) of gate valve 102 are correctly right It is accurate.Fixing screws can be used to be held in place threaded insert 300.

Spring 304 surrounds at least a portion of lower retainer 290 and valve rod 106, and the top generally from bonnet 104 is prolonged Extend the surface downwards of shoulder 294.Spring 304 is as plate 194 shifts to lower position from top position and compresses.When from When the Fluid pressure of entrance 188 reduces, spring is upwardly away from the pushing plate 194 of valve 102.As it will be understood to those of skill in the art that , the fluid force in valve 102 can be acted on the valve rod 106 in valve 102, to push up valve rod 106.Spring 304 It can be worked with the upward power on valve rod 106 with one or independently act on moving up plate 194.

Fig. 1 is seen, barrier film 306 is the flexible partition that sealing nut 234 is at least extended to from inside diameter surface 114.306, barrier film Between plate 194 and lid 176.Fig. 9 A-9C are seen, barrier film 306 has main part 308, and main part 308 is generally by with multiple The cylindrical member for folding 310 is constituted.It can be generally'S '-shaped (Fig. 9 B) to fold 310, and (Fig. 9 A) of general lateral v-shaped has (Fig. 9 C) of the substantially s shape of flat inner ring or outer ring, or with other annular shapes.310 are folded to be arranged in main body The inner radius of part 308 forms the bellows of inner ring 312 and the outer radius formation outer shroud 314 in main part 308.In Fig. 9 A- In 9C example, barrier film 306 is shown as having two inner ring 312 and two outer shrouds 314.However, the barrier film 306 of this disclosure of the invention Embodiment can alternatively have be more or less than two inner ring 312 and more or less than two outer shrouds 314.Inner ring 312 The size of the actuator 100 by barrier film 306 is used wherein, wherein inner ring 312 are will depend in part on the quantity of outer shroud 314 Generally increase with the quantity of outer shroud 314 with the size of the increase of actuator 100.In alternative example, barrier film 306 for example may be used To there is zero to six inner ring 312.

Barrier film 306 is formed so that in a relaxed state barrier film 306 is configured to as shown in Fig. 9 A-9C, with main part The folding 310 divided in 308.When plate 194 is moved between plate raised position (Fig. 1) and plate extended position (Fig. 3), barrier film 306 It can not stretch or expand.In this context, the thickness for the material for referring to its septation 306 is stretched or expands by due to the surface of material Product increases and reduced or thinning state.Barrier film 306 is between release position (Fig. 9 A-9C) and expanding position (Fig. 3) by stretching It is straight to fold 310 so that the bellows form of barrier film 306 expands and extends and axially extend and move.In extended position And return after release position, barrier film can axially be shortened by forming folding 310, and will recover in Fig. 9 A-9C Shown shape.Barrier film 306 for example can form the shape shown in Fig. 9 A-9C example by molding process.At plate 194 When on plate raised position, barrier film 306 can be on shortening position.On position is shortened, barrier film 306, which can be in, loosens shape State, or can be in contraction state, its septation when being in relaxation state compared with it is axially upper shorter.When plate 194 is in plate During extended position, barrier film 306 is in the position of extension.

In the figure 7 in shown alternative, barrier film 306 can be the less component of rigidity so that folding 310 can enclose Formed around barrier film 306 in any position, such as in the bottom 324 of barrier film 306.In such embodiments, barrier film 306 is being put Single given shape can not be kept under loose state.

In another alternative shown in Fig. 9 C, main part 308 can have the interior table formed in barrier film 306 Recess 316 on face, on outer surface or on both inner surface and outer surface.Recess 316 can on the surface randomly or Patternwise separate.Each recess 316 can for example be configured to part sphere, segmented cone or other 3D shapes. Recess 316 will produce uneven surface in main part 308, and reduce the coherent possibility in the surface of barrier film 316.

It is apical ring 318 at the upper end of barrier film 306.Apical ring 318 is annular shape, and from main part 308 radially Outwardly extend.Apical ring 318 extends radially out the outermost radial diameter by folding 310.Running into main part 308 Before uppermost folding 310, apical ring 318 can bend (Fig. 1-2) on the inside radius of actuator casing 112 downwards.

In Fig. 9 A-9C example embodiment, barrier film 306 is included in the sealing lip 320 on the outward flange of apical ring 318.On Seal lip portion is projected upwards from the top of apical ring 318, and lower seal lip portion is downwardly projected from the bottom of apical ring 318.Sealing Lip 320 can have upper seal lip portion or lower seal lip portion, or both upper seal lip portion and lower seal lip portion. In Fig. 9 A-9C example, sealing lip 320 is shown as with both upper seal lip portion and lower seal lip portion.Sealing lip 320 exists Can be oval, O shapes, triangle, rectangle or other shapes on cross section.In Fig. 9 A-9C example, Sealing lip 320 is oval on cross section, and the axis of wherein longer dimension is substantially parallel to the central shaft of barrier film 306 Line.This ovaloid seal lip 320 can be compressed in the sealing lip groove 322 of the general square shape in actuator 100 (Fig. 1-2).

In certain embodiments, it is all as shown in Figure 7, apical ring 318 can have hole, the connection structure of such as bonnet bolt 182 Part will extend through hole.In an alternative embodiment, it is all as shown in figs. 1-2, apical ring 318 can be without hole, and actuator shell Body 112 and lid 176 can be fixed together by attachment means, attachment means from apical ring 318 radially outward.

Fig. 9 A-9C are seen, are the bottoms 324 of barrier film 306 in the one end relative with apical ring of main part 308.The bottom of barrier film 306 Portion 324 is substantially disc-shaped, and is extended internally from main part 308.Bottom 324 can at the transition zone of bending with every The main part 308 of film 306 is met.In Fig. 9 A-9C example, bottom 324 can be flat in release position.When fixed When position is in actuator 100, bottom 324 can substantially follow the shape of plate 194, or can be kept as than plate 194 more flat.

Bottom 324 has the central opening 326 felt relieved on the central axis of barrier film 306.Being open lip 328 can be with external Heart opening 326, and can include the upper shed lip that projects upwards either downward projection of under shed lip or upper shed lip and Both under shed lips.Fig. 9 A-9C example embodiment includes upper shed lip.

Barrier film 306 can for example be formed by nitrile rubber or silica gel.In barrier film 306 may undergo the region of abrasion, every Film 306 can use additional materials for support.Such material can be and form whole identical materials of barrier film 306, or can be with It is supportive fabric or fiber.Additional material can be added for example on the bottom 324 of barrier film, and main body is run into bottom 324 The position of part 308, the position of main part 308 is run into apical ring 318, or along apical ring 318.By this way, also may be used To build predetermined failpoint in barrier film 306.For example, tender spots can be built in barrier film 306 so that can keep being formed The region of the barrier film 306 of seal, even in the case where barrier film 306 fails.Barrier film can be designed to non-close at another Position failure is sealed, such as along the central area of main part 308.The central area of main part 308 can keep not attached Plus failure of the material to increase barrier film 306 occur possibility in such central area of main part 308.

Fig. 1 is seen, actuator 100 is included in the pressure chamber being located between plate 194 and lid 176 in actuator casing 112 330.The pressure medium of injection pressure chamber 330 will promote plate 914 to put down position in contraction or plate raised position and extension or plate Moved between putting (Fig. 3).On extended position, plate 194 than plate 194 on retracted position when closer to actuator 100 valve End.

Multiple seals can prevent pressure medium from being escaped from pressure chamber 330.Lid seal 334 can be sealed fluidly Pressure chamber 330 between lid 176 and actuator casing 112.Lid seal 334 can be included positioned at the face of casing ledge 170 The outer radius portion of barrier film 306 between upward surface 172 and the surface 178 downwards of lid 176.By one of barrier film 306 Divide to be clipped between actuator casing 112 and lid 176 and barrier film 306 can be not only held in place to but also be formed lid seal 334.Fig. 1- In 3 example embodiment, lid seal 334 is formed by the sealing lip 320 of engagement sealing lip groove 322.Sealing lip groove 322 is It is limited to the circumferential depression between the surface 172 upwardly of casing ledge 170 and the surface 178 downwards of lid 176.Sealing A part of can be formed in casing ledge 170 of lip groove 322 and a part of of sealing lip groove 322 can be formed in lid In 176.In an alternative embodiment, sealing lip groove 322 may be formed entirely in one in casing ledge 170 or lid 176. Sealing lip groove can be on cross section for triangle, ellipse, it is square, or can have alternative cross section shape Shape.Sealing lip 320 can be compressed in sealing lip groove 322.

In alternative example embodiment, it is all as shown in Figure 7, can be without sealing lip 320 and sealing lip groove 322 and can By the way that apical ring 318 is positioned between the surface 172 upwardly of casing ledge 170 and the surface 178 downwards of lid 176 and Form lid seal.Bonnet bolt 182 can apply moment of torsion by the surface 172 upwardly of casing ledge 170 and the face of lid 176 Push barrier film 306 in both downward surfaces 178.Barrier film 306 sealingly engages the He of surface 172 upwardly of casing ledge 170 Surface 178 downwards of lid 176 both form lid seal 334.

Plate seal assemblies seal other leakage paths in pressure chamber 330.Plate seal assemblies can be by being fixed on First plate seal assemblies 336 of the formation of barrier film 306 between sealing nut 234 and plate 194.See Fig. 6, the first plate seal assemblies The 336 nut lips 256 that lip 328 can be open by capture are formed.Central opening 326 can accommodate the bottom of sealing nut 234.It is close Seal nut 234 and pass through central opening 326 so that sealing nut screw thread 238 can be with the internal diameter whorl 204 of joint plate 194.Seal spiral shell The hole 260 of mother 234 can engage the pipe nipple 296 of lower retainer 290.Plate 194 is threadedly attached in sealing nut 234 When, nut lip 256 can capture opening lip 328 to form the first plate seal assemblies 336 and by resisting barrier film 306 relative to plate 194 radial motion and barrier film 306 is held in place.

In an alternative embodiment, it is all as shown in Figure 7, the basal surface of barrier film is not open lip 328.External central opening The basal surface of 326 barrier film 306 is located between the shoulder 252 of sealing nut 234 and plate 194.The surface upwardly of plate 194 is close The lower surface of feud interface membrane 306, and the face seal downwards of shoulder 252 interface membrane 306 upper surface.When Sealing nut 234 to plate 194 tighten when, barrier film 306 is pressed between plate 194 and shoulder 252.

In other alternatives again, sealing nut 234 does not extend across the bottom 324 of barrier film 306, and barrier film 306 can be without central opening.

Fig. 1 is seen, at barrier film 306 in position and the plate seal assemblies 336 of lid seal 334 and first both fluid When ground is sealed, pressure chamber 330 is limited by barrier film 306, sealing nut 234 and lid 176, so as to limit first pressure chamber 338. In one embodiment, barrier film 306 is supported completely by plate 194 and actuator casing 112.Particularly, solid component with substantially Whole barrier films 306 are contacted so that solid component prevents barrier film 306 from outwards being expanded in response to pressure medium.Plate 194 crosses over housing 112 whole internal diameter supports the downside of barrier film 306 on both raised and depression surfaces of plate 194.The inside meter of housing 112 Face 114 supports the side of barrier film 306.

When pressure medium is injected into first pressure chamber 338, pressure medium is to the applying power of barrier film 306, and the quilt of plate 194 It is moved to plate extended position.On plate extended position, the non-supporting zone without barrier film 306.When plate 194 is in plate raised position When upper, or when plate 194 is on plate extended position, barrier film 306 does not extend axially past plate 194.Barrier film 306 is from internal diameter The inside part in surface 114 is supported by plate 194.Because barrier film 306 is completely supported, the phase that can be born with unsupported barrier film Than it can bear pressure higher in first pressure chamber 338.Therefore this embodiment can have does not support barrier film than conventional Higher actuator operating pressure, it is conventional not support the operating pressure of barrier film to can be limited to 150psig.In addition, barrier film 306 can not have There is fiber reinforcement and can be thinner than some conventional separators.

Pressure chamber 330 is at plate 194 by a stream in the first plate seal assemblies 336 and the second plate seal assemblies 340 Seal body.Second plate seal assemblies 340 can be formed by side wall seal 218 and holding seal 214, side wall seal 218 sealingly engage the inside diameter surface 112 of housing 112 to provide the dynamic sealing between inside diameter surface 114 and plate 194, keep Seal 214 is on the external diameter surface of the cylinder-shaped body 236 for the center hole 198 for sealingly engaging plate 194.Keep seal The external diameter of 214 external sealing nuts 234 and axially separated with barrier film 306.

Embodiments herein provides second pressure chamber 342.Second pressure chamber 342 can be the aux. pressure of redundancy Chamber, its will provide Fluid Sealing pressure chamber 330, if so that first pressure chamber 338 failure allow actuator 100 after It is continuous to continue to operate (Fig. 4) with full load.Fig. 4 is seen, second pressure chamber 342 can be by plate 194, actuator casing 112 and lid 176 Limit.Second pressure chamber 342 can include the second plate seal assemblies 340, and the second plate seal assemblies 340 are by side wall seal 218 form with holding seal 214, and side wall seal 218 sealingly engages the inside diameter surface 112 of housing 112 to provide internal diameter Dynamic sealing between surface 114 and plate 194, keeps seal 214 in the circle for the center hole 198 for sealingly engaging plate 194 On the external diameter surface of cylindrical bodies 236.Second pressure chamber 342 will also have lid seal 334.Lid seal 334 can be by The outer radius portion of barrier film 306 is formed, and the outer radius portion of barrier film 306 is located at surface 172 upwardly and the lid of casing ledge 170 Between 176 surface 178 downwards, even if barrier film 306 ruptures.If the first plate seal assemblies 336 keep complete, keep Seal 214 will be redundancy.Depending on the characteristic of the failure of first pressure chamber 338, the first plate seal assemblies 336 or guarantor The sealing between the sealing nut 234 of second pressure chamber 342 and plate 194 can be provided by holding seal 214.

Second pressure chamber 342 can be alternatively by it is intended that with and without using First pressure chamber room 338.Before such as Described same parts, actuator 100 can be assembled into no barrier film 306.The double grading of component allows operator to activate Device is operated without keeping second set of valve and part as piston actuater.In order to operate the actuator 100 without barrier film 306, Sealing ring (not shown) can be positioned between housing 112 and lid 176.The side wall seal 218 of plate 194 is formed to inside meter The seal in face 114, so as to limit pressure chamber without using barrier film.The pressure medium injected through entrance 188 is pushed down on Plate 194, therefore promote valve rod 106 to move down.

In order to change the downward power applied by actuator 100, outside plate 202 can be removed from hub 200, and with identical The outside plate 202 of internal diameter but various outer diameter may be mounted on hub 200.Actuator casing 112, which can be used to have, corresponds to new peace The housing of the internal diameter of the external diameter of the outside plate 202 of dress is substituted.Lid 176 is similarly by with the chi corresponding to the housing 112 newly installed Very little lid 176 is substituted.Finally, barrier film 306 can be substituted with new barrier film 306, and the size of new barrier film 306 is for new outside plate 202nd, housing 112 and lid 176 and appropriate setting.When being switched to another size from a size, other parts are (such as Sealing nut 234, bar 226 and bonnet 104) can be without replacing.

Another alternative valve actuator system includes the first and second actuator (not shown).Second actuator Component can be axially aligned with the first actuator.Each actuator includes actuator casing 112, plate 194, lid 176 and entrance 188.First actuator can be axially located above the second actuator and with than the second actuating Device assembly less diameter.Specifically, actuator casing 112, plate 194 and lid 176 can each of have than the second actuator The part less diameter of same type in component.In an alternative embodiment, the first and second actuators can have base This similar diameter.

In operation, pressure medium introduces pressure chamber 330 through entrance 188.In the embodiment in figure 1, pressure medium Apply downward power into first pressure chamber 338 and on barrier film 306 and plate 194, this pushes down on plate 194, lower retainer 290 and valve rod 106 so that movable valve 102.

Fig. 4 is seen, if barrier film 306 fails, is such as ruptured, then the alternative first pressure chamber 338 of second pressure chamber 342 And actuator 100 can continue with load operation.Alternatively, if the leakage of barrier film 306 is still generally still complete, and In action, then operator can inject through the sealant of device 192 for lid seal 334 and first piston seal assembly 336 Sealant is injected in port so that sealant formation and the failure area of barrier film 306 in sealing contact and first pressure chamber 338 Recover to working condition.

Fig. 5 is seen, if barrier film 306 fails, operator can alternatively install tubular diaphragm 344 to provide and substitute first Pressure chamber 338.Tubular diaphragm 344 is the annular tube shaped component with valve rod 346.Tubular diaphragm can plate 194 and lid 176 it Between be positioned in actuator casing 112, and can be with external sealing nut 234 and indicating arm 226.Valve rod 346 can be extended through Entrance 188 is crossed, for pressure medium is injected into tubular diaphragm 344.By the way that pressure medium is added in tubular diaphragm 344, First pressure chamber 338 is act as, tubular diaphragm 344 will expand and apply downward power on barrier film 306 and plate 194.

Although the present invention is only shown and described with some in its form, will show for those skilled in the art and What is be clear to is that its is really not so limited, but allows various change without departing from the scope of the present invention.

Claims (21)

1. a kind of device for being used to activate valve, described device includes：

Actuator casing, it has valve end, Gai Duan, and limits the side wall of the internal diameter of the actuator casing；

It is connected to the lid at the lid end of the actuator casing；

The plate in the actuator casing is positioned at, the plate has core and is sliding engaged the actuator casing The external diameter of the internal diameter；

It is located at the pressure chamber in the actuator casing between the plate and the lid, the plate is in response to injecting the pressure The pressure medium of power chamber and moved between plate raised position and plate extended position, the plate compares on the plate extended position Closer to the valve end on the plate raised position；

The sealing nut of the plate is connected to, the sealing nut is operable to the central opening of interface membrane；And

Fluidly seal the lid seal of the pressure chamber between the lid and the actuator casing；Wherein

The pressure chamber is fluidly close by one in the first plate seal assemblies and the second plate seal assemblies at the plate Envelope；And wherein

First plate seal assemblies are formed by the barrier film being fixed between the sealing nut and the plate；And

Second plate seal assemblies are by outside diameter wall seal and keep seal to be formed, and the outside diameter wall seal is located at Between the internal diameter of the actuator casing and the external diameter of the plate, the holding seal is located at the sealing nut External diameter and the plate internal diameter between.

2. device according to claim 1, it is characterised in that after first plate seal assemblies failure, described second Plate seal assemblies will fluidly seal the pressure chamber.

3. device according to claim 1, it is characterised in that the external sealing nut of holding seal it is described External diameter, and axially separated with the barrier film.

4. device according to claim 1, it is characterised in that：

The barrier film has the barrier film lip of the central opening of the external barrier film；

The sealing nut has collar nut lip；And

First plate seal assemblies are limited by the barrier film lip kept by the nut lip.

5. device according to claim 1, it is characterised in that the barrier film has outer radius portion, and wherein described lid Seal includes the outer radius portion for the barrier film being located between the lid and the actuator casing.

6. device according to claim 5, it is characterised in that the outer radius portion has annular seal lip, it engages position Annular seal lip groove between the lid and the actuator casing.

7. device according to claim 1, it is characterised in that also including extending to the note of the sealant in the pressure chamber Inbound port, the sealant injection port optionally by sealant introduce the pressure chamber and with the damage area of the barrier film Domain forms in sealing contact.

8. device according to claim 1, it is characterised in that by the way that the lid is placed on the actuator casing, And the lid is rotated to latched position from off-position, the lid can be releasably attached to the actuator casing, It is described to cover less than one complete circle of rotation between the off-position and the latched position.

9. device according to claim 1, it is characterised in that the barrier film is by expanding bellows form and axially stretching It is long and be in the plate on plate raised position and the barrier film has by least one inner ring and at least one on cross section Shorten position and the extended position when the plate is on plate extended position during the bellows form of individual outer shroud formation Between move.

10. a kind of device for being used to activate valve, described device includes：

Actuator casing, it has valve end, lid end and limits the side wall of the internal diameter of the actuator casing；

Lid, it is connected to the lid end of the actuator casing；

The plate in the actuator casing is positioned at, the plate has core and is sliding engaged the actuator casing The external diameter of the internal diameter；

First pressure chamber and second pressure chamber, it is located in the actuator casing between the plate and the lid；Its In

The first pressure chamber is limited by the barrier film supported by the plate at least in part；

The second pressure chamber is limited by the plate, the actuator casing and the lid, and the second pressure chamber has Plate seal assemblies, it includes the outside diameter wall between the internal diameter of the actuator casing and the external diameter of the plate Seal；And

Formed by least one in the first pressure chamber and the second pressure chamber between the lid and the plate Fluid Sealing region, and the plate in response to inject the Fluid Sealing region pressure medium in plate raised position and Moved between plate extended position, the plate on the plate extended position than on the plate raised position closer to the valve End.

11. device according to claim 10, it is characterised in that be additionally included between the lid and the actuator casing Fluidly sealed lid seal.

12. device according to claim 11, it is characterised in that the barrier film has outer radius portion, and wherein described Lid seal includes the outer radius portion for the barrier film being located between the lid and the actuator casing.

13. device according to claim 12, it is characterised in that the outer radius portion of the barrier film includes sealing lip, And the lid seal includes the sealing lip being located in annular seal lip groove, the annular seal lip groove is located at institute State between lid and the actuator casing.

14. device according to claim 10, it is characterised in that the barrier film includes the annular tube shaped structure with valve rod Part.

15. device according to claim 10, it is characterised in that after first pressure chamber failure, described second Pressure chamber will fluidly seal the region of the Fluid Sealing.

16. device according to claim 10, it is characterised in that described also including the sealing nut for being connected to the plate Sealing nut is operable to engage the central opening of the barrier film.

17. device according to claim 16, it is characterised in that the second pressure chamber includes keeping seal, its The external diameter of the external sealing nut, and axially separated with the barrier film.

18. device according to claim 16, it is characterised in that：

The barrier film has the barrier film lip of the central opening of the external barrier film；

The sealing nut has collar nut lip；And

The first pressure chamber is limited by the barrier film lip kept by the nut lip at least in part.

19. device according to claim 10, it is characterised in that also close in the first pressure chamber including extending to Seal agent injection port, the sealant injection port optionally by sealant introduce the first pressure chamber and with it is described every The failure area of film forms in sealing contact.

20. device according to claim 10, it is characterised in that by the way that the lid is placed on into the actuator casing On, and the lid is rotated to latched position from off-position, the lid can be releasably attached to the actuator shell Body, it is described to cover less than one complete circle of rotation between the off-position and the latched position.

21. device according to claim 10, it is characterised in that in the plate raised position and the plate extended position Each in, the barrier film does not extend axially past the plate.