CN105899860A - Valve operator assembly with freewheel and friction means - Google Patents

Abstract

A valve operator assembly is provided for a valve and comprises a housing (18), an input member (20) rotatably mounted, and a transmission mechanism (22) comprising a translating element (24) and a rotating element (28) connected to the input member, said transmission mechanism being adapted to convert applied rotation of the input member into axial translation of said translating element. The assembly further comprises at least one locking mechanism (23) radially interposed between the transmission mechanism (22) and the housing (18), and provided with friction means (82) freely movable in circumferential direction relative to the transmission mechanism and to the housing and with one freewheel (80) comprising a plurality of locking members mounted in radial contact with a track of said friction means, the freewheel and the friction means cooperating together to lock the transmission mechanism (22) with the housing (18) in a static position of said assembly.

Description

There is the valve operator assembly of flywheel and rubbing device

Technical field

The present invention relates to valve and manually operable valve such as gate valve, control or regulate the neck of valve or choke valve Territory.It is more particularly related to a kind of valve operator assembly for gate valve.

Background technology

Valve controls the flowing of fluid for various industry.Especially, gate valve is widely used in oil and natural Gas industry, to control the flowing of the fluid produced in the different phase produced.Most for this industry Number gate valve includes the valve body with longitudinal flow hole and the horizontal lock chamber intersected with this flow orifice.Have laterally The lock extending the lock opening extended there through is arranged in lock chamber.Valve rod is provided in open position and pass Mobile lock between closed position, at open position, lock opening is directed at flow orifice, and in closed position, lock leaves Mouth offsets with flow orifice.The lock chamber of valve body is covered lid by have an axial hole that valve rod extends there through.

This gate valve is associated with valve operator assembly, for driving valve rod the most up and down, To close and opening gate valve.Can manually activate gate valve.In this case, valve operator assembly Generally include drive mechanism, the rotary motion of handwheel to be converted into the axially-movable of valve rod.In order to quickly Opening and closing have minimum circle (turn) number gate valve, drive mechanism can be ball screw framework or Planet roller screw mechanism, in order to reduce the such as artificial hand wheel torque of operation moment of torsion, or use for table The driven by power of face valve or use remotely operate submersible (ROV) or for the electric actuation of sea cock and valve quilt Promote.For more details, such as, it is referred to patent EP-B1-1419334 (SKF).

Owing to this screw mechanism is prone to reverse drive under the pressure of fluid, so gate valve can be beaten unintentionally Open or close and close.This reverse drive can not only cause the problem with desired Flow-rate adjustment, but also can Can cause hurting operator, the handwheel such as rotated hits.

Therefore, balance system is generally arranged on the valve body of gate valve, to prevent from using the power applied by fluid Reverse drive drive mechanism.This system includes the gimbal lever being arranged on valve body, and it is exposed to stream Body pressure, with the power offset or balance is applied on lock.

However, it may be necessary to amendment valve body design by such balance system integration on gate valve.This leads Cause the labyrinth of gate valve.Additionally, increase for the significant spatial needed for gate valve.

Summary of the invention

It is an object of the invention to overcome these shortcomings.

The specific purpose of the present invention be to provide a kind of for valve such as gate valve, control or regulate valve or throttling The valve operator assembly of valve, it is not reversible or reverse drive.

In one embodiment, it is provided that a kind of valve translation member for including valve body and be axially movable The valve operator assembly of valve.Described assembly includes the housing being adapted to mount on described valve, relative to described Housing rotates the input link installed and includes the translation being suitably connected to the valve translation member of described valve Element and the drive mechanism rotating element being connected to described input link.Described drive mechanism is suitable to defeated The rotation applied entering component is converted into the axial translation of described translation member.Described assembly also includes edge At least one locking mechanism being radially arranged between described drive mechanism and housing.This locking mechanism is arranged There is the rubbing device that can move freely on the circumferencial direction relative to drive mechanism and housing and arrange There is at least one of multiple locking components of including being mounted to radially contacting with the track of described rubbing device Flywheel.Flywheel coordinates static at described assembly of drive mechanism and case lock together with rubbing device Position.

Advantageously, described flywheel is arranged so that, in described resting position, described locking component is in locking Position, in order to produce the braking torque contrary with the reverse drive moment of torsion of described drive mechanism.

In a preferred embodiment, described locking component at input link relative to housing in driver The side of the reverse drive moment of torsion of structure is in described latched position when rotating up.Preferably, input link is worked as When rotating on the rightabout of described reverse drive moment of torsion, locking component switches in unlocked position and protects Hold.

In a preferred embodiment, described rubbing device is suitable in described rubbing device and housing or biography Friction torque is produced so that total friction torque of described assembly is more than or equal to described transmission between motivation structure The reverse drive moment of torsion of mechanism.Advantageously, described rubbing device be suitable to produce more than or equal to described reversely The friction torque of driving torque.

Described rubbing device can include the drag ring radially abutting against described drive mechanism or housing.Institute Stating the support ring that rubbing device can also include that drag ring is mounted thereto, described locking component is mounted to edge Radially contact with described support ring.

In one embodiment, described flywheel is arranged on described drive mechanism, and described rubbing device is along footpath To around described flywheel and radially abut against described housing.Alternately, described rubbing device is along footpath To abutting against described drive mechanism, described flywheel radially around described rubbing device and with described housing Radially contact with.

Described drive mechanism can also include branch sleeve, its be connected to described mechanism rotation element and Described input link is installed on it.

In one embodiment, described locking mechanism is arranged on rotation element and the housing of described drive mechanism Between.Alternately, described locking mechanism may be mounted between described branch sleeve and housing.

In one embodiment, described drive mechanism include screw rod, around and with described screw coaxial Nut and the multiple rolling elements being arranged radially between described screw rod and nut.Each rolling unit Part can engage with the external screw thread being arranged on screw rod and nut and female thread.

In one embodiment, described screw rod forms translation member, and described nut is connected to input link. Alternately, described nut can form rotation element, and described screw rod is connected to input link.

Preferably, described valve operator assembly also include being arranged radially in described drive mechanism and housing it Between at least one rolling bearing.

The invention still further relates to a kind of valve, particularly gate valve, control or regulate valve or choke valve, it includes Valve body, the valve translation member being axially movable and valve operator assembly as previously defined.Described valve is put down Moving component can e.g. valve rod or piston.

Accompanying drawing explanation

That be given by non-limiting example by research and detailed by the specific embodiment shown in accompanying drawing Describing, the present invention and advantage thereof may be better understood:

-Fig. 1 is the cross section of the valve operator assembly for gate valve according to the present invention the first example,

-Fig. 2 is the cross section of the reversion roller screw mechanism of Fig. 1 assembly,

-Fig. 3 is the detailed view of Fig. 1,

-Fig. 4 is the cross section of the IV-IV along Fig. 1,

-Fig. 5 is the perspective view of the flywheel of Fig. 1 assembly,

-Fig. 6 to Fig. 8 is the partial cross section of the IV-IV of the Fig. 1 according to resting position and two of assembly Operating pattern,

-Fig. 9 is the cross section of the valve operator assembly for gate valve according to the present invention the second example, with And

-Figure 10 is the cross section of the valve operator assembly for gate valve according to the present invention the 3rd example.

Detailed description of the invention

Valve operator assembly 10 shown in Fig. 1 is suitable to gate valve 12, and this gate valve is provided with cover 14, by described Cover the valve body (not shown) of lid and there is the valve stem movable 16 of axis 16a.Traditionally, valve body There is flow orifice and the horizontal lock chamber intersected with this flow orifice.Gate valve also includes that having therefrom horizontal expansion wears The lock being arranged in lock chamber of the lock opening crossed.For the more details of this gate valve, it is referred to EP-B1-1419334 (SKF), it is incorporated herein by reference herein.

Valve operator assembly 10 includes the tubular shell 18 being arranged on the cover 14 of gate valve, relative to described Housing rotates the input link 20 installed and reversion roller screw mechanism 22, and it is between described input Between the valve rod 16 of component and described valve, it is converted into the axle of valve rod with the rotary motion by input link 20 To motion.Invert in roller screw mechanism 22 is installed to the hole 18a of housing and be connected to input link 20.One axial end portion of housing 18 is fixed to cover 14 by screw thread (not shown).Example in diagram In son, hole 18a has stepped-style.

As will be discussed later, valve operator assembly 10 also includes locking mechanism 23, and it is along footpath To between housing 18 and reversion roller screw mechanism 22, and be suitable to prevent this mechanism from applying The reverse drive under fluid pressure on valve rod 16.

As shown more clearly in figure 2, reversion roller screw mechanism 22 includes: be provided with external screw thread 26 Screw rod 24, its axis 24a is coaxial with the axis 16a of valve rod 16；Nut 28, it is around screw rod 24 Being co-axially mounted and be provided with female thread 30, the interior diameter of this female thread is more than the overall diameter of external screw thread 26； And the multiple longitudinal roller 32 being arranged radially between screw rod 24 and nut 28.

Screw rod 24 extends longitudinally through the cylindrical hole of the nut 28 being formed with female thread 30 on it. Nut 28 has tubular form, and is extended to accommodate the four corner of screw stroke.Exist vertically On the side relative with input link 20 (Fig. 1), recess 24b is formed at the table radially at the front of screw rod 24 On face, and the end of the valve rod 16 of gate valve is fixed to wherein.Valve rod 16 is by any suitable device Such as it is connected to screw rod 24 by screw thread and/or pin.

Roller 32 is mutually the same, and is distributed regularly around screw rod 24.Each roller 32 edge Axis 32a (it is coaxial with the axis 24a of screw rod) extends, and includes and screw flight 26 and spiral shell The external screw thread 34 that female screw thread 30 engages.At each axial end portion, each roller 20 also includes external gear Tooth 36,38, screw thread 34 extends outward and himself is by outward extending cylindrical spiral shell axially outward for it Bolt 40,42 is axially extending.Each gear teeth 36,38 be axially located in relevant bolt 40,42 with Between external screw thread 34.The external screw thread 34 of each roller be axially located in the two gear teeth 36,38 it Between.

Roller screw mechanism 22 also includes two ring gears 44,46, and they are arranged on outside screw rod 24 On surface and each include the external tooth that the gear teeth 36,38 of meshing roller 32 respectively synchronizes for it The gear teeth.Each gear 44,46 is axially located in the end of the external screw thread 26 near screw rod.Described outer spiral shell Stricture of vagina 26 is axially located between the two gear 44,46.In the disclosed embodiment, gear 44, On 46 outer surfaces being formed directly into screw rod 24.Alternatively, gear can be fixed to screw rod 24 On separating component.

Mechanism 22 also includes two circular guide or the shading ring being arranged on the outer surface of screw rod 24 48、50.Described shading ring 48,50 is arranged radially between the female thread 30 of screw rod 24 and nut, And not with described thread contact.Each shading ring 48,50 is arranged on the outer surface of screw rod 24, along axle To adjoining relevant gear 44,46.Each shading ring 48,50 about relevant gear 44,46 along axle To the lateral offset towards nut 28.Each shading ring 48,50 includes multiple cylindrical throughgoing recesses (not Mark), it is distributed the most regularly and the bolt 40,42 of roller is accommodated within portion.Every Make the roller 32 can carried and rule therein is circumferentially-spaced can be kept from ring 48,50.Mechanism 22 also include elastically keeping ring 52,54, and it is recessed that each is arranged on the outer surface being formed at screw rod 24 In groove (not shown), in order to axially maintain corresponding shading ring 48,50.

Referring again to Fig. 1, roller screw mechanism 22 also includes the branch sleeve 70 being arranged on nut 28. Sleeve 70 includes the ring being such as threadably secured to the flange 28a of nut by any suitable device Shape axial part 70a, the most described axial part 70a extend and axially against nut Radial part 70b of end and the pin 70c highlighted axially outward from described radial part 70b.Seal Device (not shown) is arranged between axial part 70a of sleeve and the hole of housing 18.In shown example In son, input link 20 includes the operable handwheel 72 being fixed to sleeve 70.Handwheel 72 herein by It is fixed on the pin 70c of sleeve.Described handwheel is formed to rotate and drives input.

Valve operator assembly 10 also includes that two rolling bearings 60,62 are to guide reversion roller screw mechanism Nut 28 relative to the rotation of housing 18.Rolling bearing 60,62 is diametrically mounted to nut 28 Between the shoulder hole 18a of outer surface and housing.The radially mounted one-tenth of rolling bearing 60,62 and nut 28 Outer surface contact with the diameter portion of the shoulder hole 18a of housing.In disclosed example, roll Bearing 60,62 is angular contact thrust ball bearing and axially apart from one another.Retaining ring 64 is fixed on On the outer surface of nut 28 and axially against rolling bearing 60.The most on the opposite sides, rolling Dynamic bearing 62 is mounted to be close to the flange 28a of nut 28 vertically, and it is towards the appearance of described nut Face out and radially extend.Flange 28a is axially located in the axial end portion of nut.Assembly 10 also includes solid The annulus 66 being scheduled on the outer surface of nut 28.Sleeve 66 the most at one end abuts against the axis of rolling Hold the inner ring of 60, and abut against another rolling bearing 62 in axially opposite end.

In the example in the figures, locking mechanism 23 is axially located between rolling bearing 60,62.Locking Mechanism 23 is coaxial with the axis 24a of screw rod.Locking mechanism 23 is arranged radially in and is fixed to invert roller Between sleeve 66 and the housing 18 of the nut 28 of screw mechanism.Locking mechanism 23 and nut 28 and Radially contact with housing 18." radially contact with " and be interpreted as and drive mechanism 22 or direct with housing 18 Radially contact with, or by the parts that are fixed on described drive mechanism or housing and drive mechanism 22 or Indirectly radially contact with housing 18.

As Fig. 3 is more clearly shown in, locking mechanism 23 includes one-way clutch or flywheel 80 (schematically Illustrate) and rubbing device 82, it coordinates with flywheel and radially between described flywheel and housing 18. Flywheel 80 is different from rubbing device 82.Rubbing device 82 is radially around flywheel 80.

Rubbing device 82 is mounted in a circumferential direction relative to drive mechanism 22, housing 18 and flywheel 80 can move freely.Rubbing device 82 engages with housing 18 and flywheel 80 to frictionally.

In the example in the figures, rubbing device 82 includes support ring 84 and is installed in described support ring Drag ring 86.Drag ring 86 is fixed to support ring 84 by any suitable device.Support ring 84 edge It is radially arranged between drag ring 86 and flywheel 80.Support ring 84 has ring form, and arranges Have the cylindrical outer surface 84a being mounted to radially contact with drag ring 86 and with flywheel 80 sliding contact Relative cylindrical hole 84b.Such as, support ring 84 can be made of metal.Support ring 84 also includes Limit the outer surface 84a radial side face (not shown) relative with the two of hole 84b vertically.

As will be discussed later, drag ring 86 is suitable between rubbing device 82 and housing 18 Create friction torque so that total friction torque of assembly 10 reversely drives more than or equal to drive mechanism 22 Dynamic torque.Drag ring 86 is arranged radially between housing 18 and support ring 84.Drag ring 86 has Ring form, and engage with housing 18 and with flywheel 80 to frictionally.Drag ring 86 sets It is equipped with and is mounted to cylindrical outer surface 86a that the hole 18a with housing radially contacts with and is arranged on support ring Relative cylindrical hole 86b on the outer surface 84a of 84.Outside drag ring 86 also includes limiting vertically The radial side face (not shown) that surface 86a is relative with the two of hole 86b.In the example in the figures, The side surface of drag ring 86 is coplanar with the side front face surface of support ring 84 respectively.Drag ring 86 can be by Metal or be made up of plastic material.

As shown in Figures 4 and 5, flywheel 80 includes multiple wedge cams or voussoir 90 and for keeping described The annular retainer 92 of voussoir.Voussoir 90 is arranged on the interior sliding rail formed respectively by rubbing device 82 And between outer sliding rail or raceway and the sleeve 66 of the nut 28 that is fixed to drive mechanism 22.More smart Really, outer slip raceway is formed by the hole of support ring 84, and interior slip raceway is by the outer surface shape of sleeve 66 Become.Alternatively it is possible to unpredictable such sleeve 66.In this case, voussoir is mounted directly Become to contact with nut 28.Voussoir 90 together with nut 28 and rubbing device 82 in latched position and solution Move between lock or off-position.In the example in the figures, voussoir 90 is axisymmetric in shape.

Retainer 92 includes the multiple windows for voussoir 90 or recess 94.Recess 94 is at circumferencial direction On be relative to each other evenly spaced apart.It is not in contact with between retainer 92 and drive mechanism 22.Ring The retainer 92 of shape global shape can advantageously be passed through to fold, cut and punching press by metal sheet blank Formed, or alternately formed by synthetic material such as polyamide.

Flywheel 80 also includes being arranged on the spring that the interior hole with described retainer of retainer 92 radially contacts with 96.Spring 96 is with wound on itself and the end-to-end or form system of the endless metal belt connected that partly overlaps Become.Such as, spring 96 can be passed through to fold, cut and be stamped and formed out by metal sheet blank, or Formed by molded synthetic material such as polyamide.

Spring 96 includes multiple chamber or recess (not shown), they the most circumferentially between Separate and in the face of the recess 94 of retainer is so as to install voussoir 90.Spring 96 also includes each wedge At least one elastic reset tongue 100 of block 90, it starts from the edge of recess and circumferentially stretches into described recessed Place is for promoting relevant voussoir 90.Each tongue 100 is designed to against relevant voussoir 90, with Just the tilting torque trending towards keeping voussoir 90 with outer interior slip raceway contact is applied.Tongue 100 is each other Identical, and be arranged between retainer 92 and voussoir 90.As modification, it is also possible to provide with every The single reset element that individual voussoir is relevant, such as, be placed on the elasticity between voussoir 90 and retainer 92 multiple Position spring.

Referring again to Fig. 3, valve operator assembly 10 also include two guiding flange 102 for flywheel 80, 104, each to be mounted to be close to one of them outer ring of rolling bearing 60,62 axially contact.Guide convex Edge 102 and 104 extends axially towards flywheel 80, keeps at a distance with the latter simultaneously.Two circlips 106, 108 respectively in axial direction between one of them in flywheel 80 and guiding flange 102,104, and Axially against relevant guiding flange.

In the resting position of valve operator assembly 10 as shown in Figure 6, i.e. when not having moment of torsion to be applied to hands Time on wheel, only fluid pressure is applied on both screw rods of valve rod and drive mechanism.Arrow on Fig. 6 110 show the reverse drive moment of torsion of drive mechanism 22 being prone to occur under the pressure of fluid.At figure In the example shown, described reverse drive moment of torsion orients in the counterclockwise direction.Flywheel 80 is mounted so as to In resting position, voussoir 90 is in the locking bit between the nut 28 of drive mechanism and rubbing device 82 Put, in order to produce the braking torque with the direction in opposite direction with reverse drive moment of torsion.Drag ring 86 Outer surface 86a between rubbing device 82 and housing 18, produce predetermined friction torque so that assembly Total friction torque of 10 is more than or equal to the reverse drive moment of torsion of drive mechanism 22.Advantageously, drag ring 86 friction torques created are more than or equal to described reverse drive moment of torsion.There is no rubbing device 82 at fluid Relative to the angular movement of housing 18 under pressure.Material and/or its length of drag ring 86 are determined, in order to Friction torque needed for acquisition.It addition, drag ring 88 can by flywheel 80 by this case by Make the support ring that can deform in radial directions to promote.Therefore, flywheel 80 can be on drag ring 88 Create the additional force increasing friction torque.

In the resting position of assembly 10, rubbing device 82 is rotationally locked on inner side by flywheel 80. Angular motion is not had between rubbing device 82 and flywheel 80.Additionally, rubbing device 82 and housing Friction torque between 18 prevents the angular motion between the two element.Therefore, the spiral shell of drive mechanism Female 28 use fixing housing 18 fixing or locking.Locking mechanism 23 is used as the coupling arrangement side with friction Formula engages with drive mechanism 22 and housing 18, thus prevents the relative circular movement between them.

Resting position at valve operator assembly 10, it is ensured that prevent from inverting the reverse of roller screw mechanism 22 Drive.This reverse drive is not itself to be guaranteed by roller screw mechanism 22, but by including containing flywheel 80 and the assembly 10 of the described mechanism of rubbing device 82 and peripheral parts guarantee.Putting on valve rod 16 With under the fluid pressure on both screw rods 24, mechanism 22 is irreversible or reverse drive.By flowing The power that body applies is not converted into the nut 28 angular displacement relative to housing 18.Accordingly, it is possible to can not be Balance system, the such as gimbal lever is predicted on the valve body of gate valve.Even if using the design of balance, it is also possible to make With valve operator, if the gimbal lever can not complete equipilibrium pressure in closed or open position.This In the case of, it is understood that there may be little imbalance can be locked.

When operator contributes to screw rod 24 in the power being applied to by fluid on the valve rod 16 of gate valve according to it Axially-movable direction on when applying torque on handwheel 72, flywheel 80 is maintained at the spiral shell of drive mechanism Latched position between female 28 and rubbing device 82.Operation moment of torsion is applied in and drive mechanism 22 On the equidirectional of reverse drive moment of torsion.On Fig. 7, operation moment of torsion is illustrated by arrow 112.Work as input Component 20 is when the side of reverse drive moment of torsion 110 rotates up, and flywheel 80 is in the locked position.

Moment of torsion 112 is handled more than the friction between rubbing device 82 and housing 18 when applied by operator Moment of torsion together with when activating the useful moment of torsion of gate valve, the nut 28 of reversion roller screw mechanism and friction Device 82 both of which is as rotated by the equidirectional relative to housing 18 shown in arrow 114.By In the rotation of nut 28, roller 32 self rotates around screw rod 24 and is axially moveable and additionally also exists Nut 28 rotates.Roller 32 is by the external gear being arranged on screw rod and engage with the gear teeth of roller 44,46 guide rotatably.Roller 32 and screw rod 24 can move into nut 28 vertically or longitudinally.Therefore, The rotary motion of handwheel 72 is converted into the axially-movable of the valve rod 16 of gate valve.

The rubbing device 82 moment of torsion produced that slides on housing 18 adds on handwheel 72 required Moment of torsion, but in the way of economical and practical, because the power being applied on the valve rod 16 of gate valve by fluid has Help the power reduced on screw rod 24 and the displacement then contributing to described screw rod.

When operator apply contrary moment of torsion on handwheel time, as by shown in the arrow 116 on Fig. 8, wedge Block 90 pivots in the opposite direction or tilts, this unblock causing described voussoir or release.Use institute State the moment of torsion of applying, the flywheel 80 solution lock-bit between the nut 28 and rubbing device 82 of drive mechanism Put middle switching.The nut 28 of reversion roller screw mechanism is relative to flywheel 80, rubbing device 82 and shell Body 18 rotates, this is because the towing moment of torsion of described flywheel is less than between rubbing device 82 and housing 18 Friction torque.Rubbing device 82 is prevented relative to the angular movement of housing 18 and flywheel 80.

In this case, the angular displacement of handwheel 72 be converted into the valve rod 16 of gate valve with pressure direction The contrary axially-movable on direction.Required torque on handwheel 72 is restricted to activate having of gate valve 12 With moment of torsion together with the towing moment of torsion of flywheel 80.Accordingly, because employ flywheel 80, so do not have The extra moment of torsion of necessary applying resists the friction torque applied by rubbing device 82.When operator no longer When applying moment of torsion on the rightabout of reverse drive moment of torsion, flywheel 80 switches in latched position.

In valve operator assembly 10, flywheel 80 matches with rubbing device 82, not have moment of torsion It is maintained at the specific angle position about housing 18 at described input link when being applied on input link 20 Time stop drive mechanism 22 together with fixing housing 18.At such resting position, drive mechanism 22 It is rigidly connected to by the friction between lock out action and rubbing device 82 and the housing 18 of flywheel 80 Housing 18.Drive mechanism 22 locks rigidly with housing 18, is applied to screw rod 24 to use by fluid On power prevent the back-driving motion of described mechanism.At the resting position of assembly 10, locking mechanism 23 Form the coupling arrangement between drive mechanism 22 and housing 18.

Additionally, the flywheel 80 of locking mechanism makes it possible to limit the required torque on input link 20, with The direction contrary with the power applied by fluid activates screw rod 24 and the valve rod of gate valve of drive mechanism 16.Reality is in this case, it is therefore prevented that rubbing device 82 is relative to the angular movement of housing 18.

In the first example being shown in which, the present invention has been illustrated with including inverting roller screw mechanism 22 The valve operator assembly 10 for gate valve.Which results in the high load capability of assembly 10, because reversion Roller screw mechanism screw thread geometry can be bigger than other type of roller screw mechanism, because not having required The startup of the minimum number wanted.Which increase load capacity, keep compact advantage simultaneously.Additionally, relatively Little helical pitch will assist in minimizing driving torque.Therefore, reverse drive moment of torsion will reduce.Assembly 10 Life-span too increases.It addition, the requisite space for assembly 10 reduces.

But, present invention can also apply to there is other type of roller screw mechanism such as such as Fig. 9 institute The valve operator assembly of the standard planetary roller screw mechanism shown.

In this second example (wherein same parts is endowed identical reference), valve operator group Part 10 is provided with planet roller screw mechanism 120, and it is between the valve rod 16 of input link 20 with gate valve Between and it include being co-axially mounted and arrange female nut 122 around screw rod 24；And it is multiple Identical roller 124, its be arranged radially between screw rod 24 and nut 122 and have be similar to as The design of the reversion roller screw mechanism described in before.In this example, the external screw thread 26 of screw rod 24 has The length extended.

Mechanism 120 also includes two ring gears 126,128, and they are arranged on the non-threaded of nut 122 In portion and the internal gear teeth that synchronizes for it of each gear teeth including meshing roller 124.Each gear 126,128 axially against the spiral shell being arranged between the female thread of described nut and relevant non-threaded portion The radial surface of female 122.

Mechanism 120 also includes: two shading rings 130,132, is each diametrically mounted to screw rod 24 And between relevant gear 126,128；And circlip (not shown), each of which is all arranged on shape Become on the hole of relevant gear 126,128 to axially maintain corresponding shading ring 130,132 In groove.Each shading ring 130,132 is provided with its inner containment bolt multiple of roller 124 Axially extending bore.

Mechanism 120 also includes outer sleeve 134, axial hole 134a that it has have stepped form and Its inner containment has nut 122 and roller 124.Nut 122 is fixed to sleeve 134.Gear 128 Radial ringed shoulder axially against the shoulder hole 134a of nut.The most on the opposite sides, protect Hold ring 136 to be fixed in described hole and axially in contact with another gear 126 abutting against this mechanism.

Rolling bearing 60,62 and locking mechanism 23 are arranged on the outer surface of sleeve 134.Sleeve 134 Be arranged radially in the nut 122 of side and rolling bearing 60,62 and opposite side locking mechanism 23 it Between.Rolling bearing 62 is close to the set that the outer surface of the most described sleeve extends vertically The flange 134b of cylinder installs.Flange 134b is axially located in the axial end portion of sleeve.In this example, The branch sleeve 70 of input link is fixed to the flange 134b of outer sleeve and axially against described Flange.Alternately, it is also possible to nut 122 and sleeve 134 are made single parts.This In the case of, rolling bearing 60,62 and locking mechanism 23 are directly installed on the outer surface of nut.

When operator apply moment of torsion on handwheel 72 time, this moment of torsion is passed to branch sleeve 70 and then It is transferred to the nut 122 of outer sleeve 134 and planet roller screw mechanism.Due to the rotation of nut 122, Roller 124 self rotates and rolls around screw rod 24, and does not moves vertically at described nut interior Dynamic.Therefore, screw rod 24 can move into nut 122, and the rotary motion quilt of handwheel 72 vertically or longitudinally It is converted into the axially-movable of the valve rod 16 of gate valve.Locking mechanism 23 action as previously described.

What the example shown in the first two was treated respectively is reversion roller screw mechanism and standard planetary roller silk Thick stick mechanism.Present invention can also apply to the valve operator group with other kinds of roller screw mechanism Part, wherein roller does not has an external screw thread, but has and wherein engage screw rod and the screw thread of nut and vertically The groove moved relative to described screw rod and nut.After complete rotation, each roller is by arranging Cam in nut end returns to its initial position.This mechanism is referred to as circulating roller screw, and Can be standard or counter-rotative type.

In the 3rd example (wherein same parts is endowed identical reference) shown in Figure 10, Valve operator assembly 10 is provided with standard ball screw mechanism 140, and the nut 142 that it includes is around spiral shell Bar 24 is co-axially mounted and is provided with female thread；And multiple identical ball 144, they radially set Put between screw rod 24 and nut 142 and engage screw thread and the screw flight 146 of described nut.Spiral shell Female 142 are installed in the hole 134a of outer sleeve 134 and axially against the radial direction ring in described hole Shape shoulder.The most on the opposite sides, during retaining ring 136 is fixed to the hole 134a of outer sleeve and Axially in contact with abutting against nut 142.Nut 142 is fixed to outer sleeve 134.Alternately, spiral shell Female 142 can be formed in parts with sleeve.Nut 142 includes being installed to following again in its thickness Loop device 148,150, to realize the recirculation of ball 144.This mechanism is referred to as standard ball leading screw. Alternately, EGR can be arranged on screw rod.This mechanism is referred to as inverting ball-screw.

It addition, present invention can also apply to that there is other type being suitable to that rotation is converted into linear movement Drive mechanism such as orient threaded valve operator assembly.But, such drive mechanism needs Big actuating moment of torsion.

In the example in the figures, locking mechanism 23 is radially between the rotation spiral shell of housing 18 with drive mechanism Between mother.Alternately, locking mechanism 23 can be arranged on the sleeve 70 of housing 18 and drive mechanism Between.But, using such configuration, the axial requisite space of assembly 10 increases.In another modification In, it is also possible to locking mechanism 23 is arranged to radially housing 18 and drive mechanism rotation nut it Between and vertically between rolling bearing 62,64 and annulus 70.

In the disclosed example, rubbing device 82 radially abuts against housing 18, and flywheel 80 is radially It is arranged between described rubbing device with drive mechanism 22 and contacts.In a modification, it is also possible to make Inverted arrangement has and radially abuts against the rubbing device 82 of drive mechanism 22 and having and be arranged radially in Flywheel 80 between described drag ring and housing 18.In this case, flywheel 80 is radially around rubbing Wipe device 82.But, using the layout of locking mechanism 23 as depicted, flywheel 80 is economical, Because its diameter is less and it is the simplest to change drag ring 84 in the case of excessive wear.

In the example in the figures, rubbing device includes drag ring 86 and support ring 84.Alternately, rub Wipe device and can only include drag ring.In this case, the voussoir of flywheel is supported directly on drag ring On track or raceway.In the example in the figures, flywheel includes the multiple voussoirs as locking component.Can replace Dai Di, it is also possible to use other type of flywheel, such as, there is the flywheel of locking roller.

Although having been based on including being connected to the screw rod of the valve rod of gate valve and being connected to the nut of input link Valve operator describe the present invention, but it is to be understood that, the company of it may also be possible to apply the invention for Receive the screw rod of input link and be connected to the nut of valve rod.In this case, nut serves as translation unit Part, screw rod serves as rotation element.Therefore, locking mechanism can be between screw rod and housing.Although Through describing the present invention based on the valve operator assembly for gate valve, but it is to be understood that, this Invention can also such as control or regulate valve with other type of valve or choke valve is used together.Valve operator Assembly can such as with can be by remotely operating submersible (ROV) or surface lock that actuator activates or sea Bottom valve is used together.

Claims (16)

1. it is used for including valve body and a valve operator assembly for the valve of the valve translation member being axially movable, Described assembly includes the housing (18) being adapted to mount on described valve, rotates relative to described housing and install Input link (20) and include the translation member (24) being suitably connected to the valve translation member of described valve With the drive mechanism (22) of the rotation element (28) being connected to described input link, described drive mechanism Being suitable to be converted into the rotation applied of input link the axial translation of described translation member, its feature exists In, described assembly also includes being arranged radially between described drive mechanism (22) and housing (18) At least one locking mechanism (23), this locking mechanism (23) is provided with relative to drive mechanism (22) Peace is included with the rubbing device (82) that can move freely on the circumferencial direction of housing (18) and being provided with Dress up at least one flywheel of the multiple locking components (90) radially contacted with the track of described rubbing device (80), flywheel (80) coordinates drive mechanism (22) and housing together with rubbing device (82) (18) resting position of described assembly it is locked in.

Valve operator assembly the most according to claim 1, wherein, described flywheel (80) is arranged to Making in described resting position, described locking component (90) is in the locked position, in order to produce with described The braking torque that the reverse drive moment of torsion of drive mechanism (22) is contrary.

Valve operator assembly the most according to claim 2, wherein, described locking component (90) exists Input link (20) relative to housing (18) in the direction of the reverse drive moment of torsion of drive mechanism (22) Upper it is in described latched position when rotating, and wherein, when input link (20) is in described reverse drive When rotating on the rightabout of moment of torsion, locking component (90) switches in unlocked position.

4. according to valve operator assembly in any one of the preceding claims wherein, wherein, described friction dress Put (82) and be suitable to produce friction between described rubbing device and housing (18) or drive mechanism (22) Moment of torsion so that total friction torque of described assembly is turned round more than or equal to the reverse drive of described drive mechanism Square.

Valve operator assembly the most according to claim 4, wherein, described rubbing device (82) is fitted In producing the friction torque more than or equal to described reverse drive moment of torsion.

6. according to valve operator assembly in any one of the preceding claims wherein, wherein, described friction dress Put (82) and include radially abutting against the drag ring (86) of described drive mechanism (22) or housing (18).

Valve operator assembly the most according to claim 6, wherein, described rubbing device (82) is also The support ring (84) being mounted thereto including drag ring (86), described locking component (90) is mounted to Radially contact described support ring.

8. according to valve operator assembly in any one of the preceding claims wherein, wherein, described flywheel (80) being arranged on described drive mechanism (22), described rubbing device (82) is radially around described Flywheel and radially abut against described housing (18).

9. according to the valve operator assembly according to any one of aforementioned claim 1 to 7, wherein, described Rubbing device (82) radially abuts against described drive mechanism (22), and described flywheel (80) is radially Radially contact with around described rubbing device and with described housing.

10. according to valve operator assembly in any one of the preceding claims wherein, wherein, described transmission Mechanism (22) also includes branch sleeve (70), its be connected to described mechanism rotation element (28) and And described input link (20) is installed on it.

11. valve operator assemblies according to claim 10, wherein, described locking mechanism (23) It is arranged between described branch sleeve (70) and housing (18).

12. according to the valve operator assembly according to any one of aforementioned claim 1 to 10, wherein, institute State locking mechanism (23) and be arranged on rotation element (28) and the housing (18) of described drive mechanism (22) Between.

13. according to valve operator assembly in any one of the preceding claims wherein, wherein, described transmission Mechanism (22) include screw rod (24), around and with the nut (28) of described screw coaxial, Yi Jiyan The multiple rolling elements (32) being radially arranged between described screw rod and nut.

14. valve operator assemblies according to claim 13, wherein, described screw rod (24) is formed Described translation member, described nut (28) forms described rotation element, and vice versa.

15. according to valve operator assembly in any one of the preceding claims wherein, also includes radially setting Put at least one rolling bearing (60) between described drive mechanism (22) and housing (18).

16. 1 kinds of valves, it includes valve body, the valve translation member (16) that is axially movable and according to front State the valve operator assembly (10) according to any one of claim.