CN208816810U - A kind of valve pneumatic actuator - Google Patents

Abstract

The utility model discloses a kind of valve pneumatic actuators, it is characterised in that: including upper membrane cover, lower membrane cover, flexible sheet, diaphragm support, multiple springs, executes bar, upper limit part and lower limit part；Membrane cover merges with lower membrane cover and is formed with an inner cavity on this, which is located on this between membrane cover and lower membrane cover and the inner cavity is divided into epicoele and cavity of resorption；The diaphragm support is amplexiformed in the flexible sheet lower surface, which is connected between the diaphragm support and the lower membrane cover and each spring is circumferentially distributed along the diaphragm support；The lower limit part is amplexiformed in the diaphragm support lower surface, which is equipped with the first elastic cushion；The upper limit part is amplexiformed in the diaphragm upper surface, which is equipped with the second elastic cushion；The execution bar upper end and the diaphragm support are affixed, which is pierced by the lower membrane cover.The kinematic accuracy and position precision for executing bar can be improved in the utility model, while reducing noise, prolongs the service life.

Description

A kind of valve pneumatic actuator

Technical field

The utility model belongs to valve technology field, more particularly, to a kind of for valve opening and closing or the Direct Travel gas of adjusting Dynamic actuator.

Background technique

Pneumatic actuator is the executive device with the opening and closing of air pressure power drive or control valve, but by title pneumatic actuator or Pneumatic device.And existing pneumatic actuator includes upper membrane cover, lower membrane cover, flexible sheet, spring, executes bar, this this on membrane cover with Lower membrane cover merges and is formed with an inner cavity, on which is located on this between membrane cover and lower membrane cover and is divided into the inner cavity Chamber and cavity of resorption, the execution bar one end are connect with flexible sheet, which is pierced by after lower membrane cover for connecting with valve rod. When work, to epicoele air inlet, which forces flexible sheet to deform downward, and overcome spring since epicoele high pressure acts on Thrust, driving executes bar and valve rod and moves down, realizes valve opening (or closing valve).After epicoele pressure release, which pushes away bullet for counter Property diaphragm, force diaphragm to collapse, driving executes bar and valve rod and moves down, closes valve (or valve opening) to realize.

And existing pneumatic actuator has the following deficiencies: when in use

First, when being deformed up and down due to the existing flexible sheet, which is limit constraint up and down, itself is again bullet Property material, the stroke up and down of the execution bar and valve rod cannot be precisely controlled, and there is a problem of controlling precision low；In addition, the elasticity Diaphragm deformation is difficult to control, makes the possible consistency of the execution bar Impact direction, causes execution bar to there are problems that deviation, influence linear essence Degree.

Second, due to existing spring generally use one and also be sleeved on execute bar on, the spring be connected to lower membrane cover and Between flexible sheet, since the single spring has the whole external force born and reset force, there are durable and fatigabilities to reduce, shadow Service life is rung, replacement frequency is high, is unfavorable for being used for a long time safely under specific condition.

Third, due to after epicoele pressure release, which pushes away anti-flexible sheet and resets, and on the flexible sheet when spring-go position Its elastic potential energy is discharged completely by moment, there is a problem of that impact force and noise are big, and be also unfavorable for stable action control.

Utility model content

In order to which in view of one or more defects existing in the prior art, it is pneumatic that the utility model provides a kind of valve use Actuator while reducing operating noise, prolong the service life, it can be achieved that improve the kinematic accuracy and position precision for executing bar.

To achieve the above object, the utility model provides a kind of valve pneumatic actuator, it is characterised in that: including upper Membrane cover (1), lower membrane cover (2), flexible sheet (3), diaphragm support (4), multiple springs (5), execute bar (6), upper limit part (7) and Lower limit part (8)；Membrane cover (1) merges with lower membrane cover (2) and is formed with an inner cavity on this, which is located at film on this Epicoele (N) and cavity of resorption (M) are divided between lid (1) and lower membrane cover (2) and by the inner cavity；The diaphragm support (4) is amplexiformed in described Flexible sheet (3) lower surface, which is connected between the diaphragm support (4) and the lower membrane cover (2) and each spring (5) circumferentially distributed along the diaphragm support (4)；The lower limit part (8) is amplexiformed in the diaphragm support (4) lower surface, the lower limit Position part (8) lower end is equipped with the first elastic cushion (9)；The upper limit part (7) is amplexiformed in the diaphragm (3) upper surface, the upper limit part (7) upper end is equipped with the second elastic cushion (10)；Execution bar (6) upper end and the diaphragm support (4) are affixed, execution bar (6) lower end It is pierced by the lower membrane cover (2).

Using the above scheme, first, since the diaphragm support (4) is amplexiformed in the flexible sheet (3) lower surface, the execution Bar (6) upper end and the diaphragm support (4) are affixed, therefore the flexible sheet (3) can be protected by diaphragm support (4) shape restrained deformation The consistency of execution bar (6) Impact direction is demonstrate,proved, it is consistent to improve direction of the flexible sheet (3) to the execution bar (6) driving when Property, make to execute the more stable and linear movement of bar (6) movement, can avoid being biased to movement；Second, it is upper due to the flexible sheet (3) When row, the upper limit part (7) and upper membrane cover (1) offset and realize that up stroke limit controls, when the downlink of the flexible sheet (3), The lower limit part (8) and lower membrane cover (2) offset and realize that down stroke limit controls, therefore flexible sheet (3) movement travel is smart Really control, at the same so that the stroke of the execution bar (6) is realized accurate effectively control, it can be achieved that improve the kinematic accuracy for executing bar and Position precision；Third, due to lower limit part (8) lower end be equipped with the first elastic cushion (9), the lower limit part (8) by this first Elastic cushion (9) offsets with lower membrane cover (2), and first elastic cushion (9) has elastic buffer effect, can reduce to the lower membrane cover (2) impact injury, while reducing generated noise when flexible sheet (3) downlink；4th, due to the upper limit part (7) upper end is equipped with the second elastic cushion (10), which is offseted by second elastic cushion (10) with upper membrane cover (1), and Secondth elastic cushion (10) has elastic buffer effect, can reduce the impact injury to membrane cover on this (1), while reducing this Generated noise when flexible sheet (3) downlink；5th, since spring has multiple and each spring (5) along the diaphragm Pallet (4) is circumferentially distributed, therefore each spring has the reset force of the pneumatic external force and flexible sheet (3) respectively born, can mention High durable and fatigability, prolongs the service life, conducive to being used for a long time safely under specific condition.

Further, the lower limit part (8) is plate-like or tubular, which is ring-type, first elasticity Pad (9) card is set or is set on the lower limit part (8).First elastic cushion (9) and upper membrane cover (1) anchor ring, which are abutted against, in this way touches, Membrane cover (1) stress is steady on this, can reduce membrane cover on this (1) loosening and damage risk.

Further, air equalizer opening (8-1) is opened up on lower limit part (8) side wall.It can ensure that the lower limit part (8) Interior and cavity of resorption (M) is communicated, it can be ensured that the interior air pressure of lower limit part (8) and cavity of resorption (M) interior air pressure balance can prevent the lower limit The first elastic cushion (9) on part (8) is abutted against with upper membrane cover (1) anchor ring to be generated pressure difference after touch and seals, and the lower limit part (8) is avoided It influences to work normally on membrane cover (1) in absorption.

Further, the upper limit part (7) is plate-like or tubular, which is ring-type, second bullet Property pad (10) block set or be set on the upper limit part (7).Second elastic cushion (10) and lower membrane cover (2) anchor ring are abutted against in this way Touching, lower membrane cover (2) stress is steady, can reduce lower membrane cover (2) loosening and damage risk.

Further, the spring (5) is with 6-8 and each spring (5) is circumferential along the diaphragm support (4) Even distribution.

Further, diaphragm support (4) lower surface is installed with upper spring seat (12), and lower membrane cover (2) upper surface is solid Equipped with lower spring cup (13), which abuts with the upper spring seat (12), spring (5) lower end and the lower spring Seat (13) abuts.The spring (5) is positioned through the upper spring seat (12) and lower spring cup (13), make spring (5) position constraint and It keeps reaching straight state, and avoids spring (5) play and inclination and influence stability.

Further, which is connect by upper connecting rod (14) with clasp nut (15), the clasp nut (15) it is connect by lower connecting rod (16) with valve rod.It is coaxially connected using facilitating the valve rod and executing bar, while dismantling and replacing It is convenient.

Further, bracket (17) are installed with below the lower membrane cover (2)；The bracket (17) include the seat of honour (17-1), under Seat (17-2) and strutbeam (17-3), the seat of honour (17-1) and lower seat (17-2) are spaced apart up and down, the seat of honour (17-1) and lower seat (17-2) fixes as one through the strutbeam (17-3), which offers perforation (17-11), the upper connecting rod (14) Be cooperatively connected with upper perforation (17-11), which offers lower perforation (17-21), the lower perforation (17-21) with it is upper Perforate (17-11) with one heart.Since the seat of honour (17-1) and lower seat (17-2) are spaced apart up and down, for the seat of honour (17-1) and lower seat Upper connecting rod (14), clasp nut (15), lower connecting rod (16) or/and valve rod assembling and offer sky enough between (17-2) Between, simultaneously because lower perforation (17-21) and upper perforation (17-11) are concentric, to ensure that the execution bar (6) and valve rod are concentric.

Further, locator (18) are installed on the bracket (17), the locator (18) is for detecting the execution The location status of bar (6).Can detect in this way the execution bar (6) connection valve rod location status, and the locator (18) and control When system processed connects, which, which can feed back, gives control system.

Further, the locator (18) is fixedly mounted on the strutbeam (17-3), in locator (18) induction end It is provided with by wiper arm (19), bar shaped allocating slot (19-1) should be equipped with by wiper arm (19), and plug and stir in the bar shaped allocating slot (19-1) It sells (20), this is stirred pin (20) one end and passes through linking arm (21) and the upper connecting rod (14), clasp nut (15) or lower connecting rod (16) it connects.When the execution bar (6) moves, this can be driven to stir pin (20) by the linking arm (21) and dialled in the bar shaped It is slided in slot (19-1) and this is forced to be driven locator (18) induction end to rotate by wiper arm (19) one end, the locator (18) The different action states and situation of the execution bar (6) are detected according to the angle and direction of rotation.

The beneficial effects of the utility model are:

First, the utility model since the diaphragm support is amplexiformed in the flexible sheet lower surface, the execution bar upper end with The diaphragm support is affixed, therefore the flexible sheet is by diaphragm support shape restrained deformation, it is ensured that the execution bar Impact direction Consistency makes to execute the more stable and linear fortune of bar movement to improve orientation consistency when flexible sheet drives the execution bar It is dynamic, it can avoid being biased to movement；

Second, the utility model due to the flexible sheet uplink when, the upper limit part and upper membrane cover offset and realize Stroke limit control, when the downlink of the flexible sheet, the lower limit part and lower membrane cover offset and realize that down stroke limit controls, because This flexible sheet movement travel is accurately controlled, while the stroke of the execution bar also being made to realize accurate effectively control；

Third, the utility model due to the lower limit part lower end be equipped with the first elastic cushion, the lower limit part by this first Elastic cushion offsets with lower membrane cover, and the flexible buffer function of the first resilient mat, can reduce the impact injury to the lower membrane cover, Generated noise when the flexible sheet downlink is reduced simultaneously；

4th, the utility model due to the upper limit part upper end be equipped with the second elastic cushion, the upper limit part by this second Elastic cushion offsets with upper membrane cover, and the secondth flexible buffer function of resilient mat, can reduce the impact damage to membrane cover on this Wound, while reducing generated noise when the flexible sheet downlink；

5th, multiple and each spring is circumferentially distributed along the diaphragm support since spring has for the utility model, because There is the reset force of the pneumatic external force and flexible sheet respectively born in this each spring, durable and fatigability can be improved, extension makes With the service life, conducive to being used for a long time safely under specific condition.

6th, the utility model can realize the kinematic accuracy and position precision for improving and executing bar, work at the same time reduction noise, Prolong the service life.

Detailed description of the invention

Fig. 1 is a kind of sectional view of valve pneumatic actuator in the utility model.

Fig. 2 is bracket with assembling stereogram between related fittings thereon (the unlocked installation of locator).

Fig. 3 is the perspective view of lower limit part.

Sectional view when Fig. 4 is lower limit part and the assembly of the first elastic cushion.

Sectional view when Fig. 5 is upper limit part and the assembly of the second elastic cushion.

Fig. 6 is the perspective view of bracket.

Fig. 7 is perspective view when a kind of valve loads onto valve with pneumatic actuator in the utility model.

Fig. 8 is perspective view when Fig. 7 is in inclination.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples:

Referring to Fig. 1-8, a kind of valve pneumatic actuator comprising upper membrane cover 1, lower membrane cover 2, flexible sheet 3, diaphragm support Disk 4, executes bar 6, upper limit part 7 and lower limit part 8 at multiple springs 5；Membrane cover 1 merges with lower membrane cover 2 and is formed in one on this Chamber, the flexible sheet 3 are located on this between membrane cover 1 and lower membrane cover 2 and the inner cavity are divided into epicoele N and cavity of resorption M；The diaphragm Pallet 4 is amplexiformed in 3 lower surface of flexible sheet, which is connected between the diaphragm support 4 and the lower membrane cover 2 and each institute It is circumferentially distributed along the diaphragm support 4 to state spring 5；The lower limit part 8 is amplexiformed in 4 lower surface of diaphragm support, the lower limit 8 lower end of part is equipped with the first elastic cushion 9；The upper limit part 7 is amplexiformed in 3 upper surface of diaphragm, which is equipped with the Two elastic cushions 10；6 upper end of execution bar and the diaphragm support 4 are affixed, which is pierced by the lower membrane cover 2.

When work, first, since the diaphragm support 4 is amplexiformed in 3 lower surface of flexible sheet, 6 upper end of execution bar with The diaphragm support 4 is affixed, therefore the flexible sheet 3 is by 4 shape restrained deformation of diaphragm support, it is ensured that the 6 stress side of execution bar To consistency, with improve flexible sheet 3 to the execution bar 6 drive when orientation consistency, make execute bar 6 act it is more stable and Linear movement can avoid being biased to movement；Second, due to the flexible sheet 3 uplink when, which offsets with upper membrane cover 1 And realize up stroke limit control, when the downlink of the flexible sheet 3, the lower limit part 8 and lower membrane cover 2 offset and realize down stroke Limit control, therefore 3 movement travel of flexible sheet is accurately controlled, while it is accurate effective also to realize the stroke of the execution bar 6 Control；Third, due to 8 lower end of lower limit part be equipped with the first elastic cushion 9, the lower limit part 8 by first elastic cushion 9 with Lower membrane cover 2 offsets, and first elastic cushion 9 has elastic buffer effect, can reduce the impact injury to the lower membrane cover 2, simultaneously Reduce generated noise when 3 downlink of flexible sheet；4th, since 7 upper end of upper limit part is equipped with the second elastic cushion 10, The upper limit part 7 is offseted by second elastic cushion 10 with upper membrane cover 1, and the secondth elastic cushion 10 is made with elastic buffer With the impact injury to membrane cover 1 on this can be reduced, while reducing generated noise when 3 downlink of flexible sheet；5th, Since spring has multiple and each spring 5 circumferentially distributed along the diaphragm support 4, each spring, which exists, respectively to be born Pneumatic external force and flexible sheet 3 reset force, durable and fatigability can be improved, prolong the service life, be conducive to specific condition under Safety is used for a long time.

Specifically, membrane cover 1 is equipped with air inlet 1-1 on this, lower membrane cover 2 is equipped with venthole 2-1.

Further, the lower limit part 8 is plate-like or tubular, which is ring-type, first elastic cushion 9 Card is set or is set on the lower limit part 8.First elastic cushion 9 and upper 1 anchor ring of membrane cover, which are abutted against, in this way touches, on this membrane cover 1 by Power is steady, can reduce the loosening of membrane cover 1 and damage risk on this.

Further, air equalizer opening 8-1 is opened up on 8 side wall of lower limit part.It can ensure that in the lower limit part 8 under Chamber M is communicated, it can be ensured that air pressure balance in air pressure and cavity of resorption M in the lower limit part 8 can prevent the first bullet on the lower limit part 8 Property pad 9 and upper 1 anchor ring of membrane cover abut against and generate pressure difference after touch and seal, avoid the lower limit part 8 from adsorbing on upper membrane cover 1 and influence just Often work.

Further, the upper limit part 7 is plate-like or tubular, which is ring-type, second elastic cushion 10 cards are set or are set on the upper limit part 7.Second elastic cushion 10 and lower 2 anchor ring of membrane cover, which are abutted against, in this way touches, the lower membrane cover 2 Stress is steady, can reduce the lower loosening of membrane cover 2 and damage risk.

Further, the spring 5 is with 6-8 and each spring 5 is circumferentially uniformly to divide along the diaphragm support 4 Cloth.

Further, 4 lower surface of diaphragm support is installed with upper spring seat 12, which is installed with down Spring base 13,5 upper end of spring are abutted with the upper spring seat 12, which abuts with the lower spring cup 13.The spring 5 position through the upper spring seat 12 and lower spring cup 13, make 5 position constraint of spring and keep up to straight state, and avoid the spring 5 plays influence stability with inclination.

In the present embodiment, which is equipped with block machine 6-1, which is successively arranged in the upper limit from top to bottom It is threadedly engaged locking through nut K again after on position part 7, flexible sheet 3, diaphragm support 4 and lower limit part 8, and above upper limit part 7 Through block machine 6-1 keep off limit, therefore the execution bar 6 be successively arranged in from top to bottom upper limit part 7, flexible sheet 3, diaphragm support 4 and Lower limit part 8 synchronizes up and down motion as a fixed body.

Further, which is connect by upper connecting rod 14 with clasp nut 15, which passes through Lower connecting rod 16 is connect with valve rod N-1.It is coaxially connected using facilitating the valve rod and executing bar, while dismantling and replacing conveniently.

Specifically, which connect (or other modes are affixed) with 14 threaded upper ends of upper connecting rod, should be with folding 15 inner hole upper end of nut connect or is socketed with 14 lower thread of upper connecting rod, which connects under this The connection of 16 threaded upper ends of extension bar or socket, 16 upper end of lower connecting rod are threadedly coupled (or its other party with the valve rod N-1 on valve N Formula is affixed).

Further, bracket 17 is installed with below the lower membrane cover 2；The bracket 17 include seat of honour 17-1, lower seat 17-2 and Strutbeam 17-3, seat of honour 17-1 and lower seat 17-2 or more are spaced apart, and seat of honour 17-1 and lower seat 17-2 are solid through strutbeam 17-3 It is connected in one, seat of honour 17-1 offers perforation 17-11, and the upper connecting rod 14 and upper perforation 17-11 are cooperatively connected, the lower seat 17-2 offers lower perforation 17-21, and the lower perforation 17-21 and upper perforation 17-11 are concentric.Due to seat of honour 17-1 and lower seat 17-2 Be spaced apart up and down, upper connecting rod 14, clasp nut 15, lower connecting rod 16 between seat of honour 17-1 and lower seat 17-2 or/ It is assembled with valve rod and sufficient space is provided, simultaneously because lower perforation 17-21 and upper perforation 17-11 are concentric, to ensure the execution bar 6 It is concentric with valve rod N-1.

Further, locator 18 is installed on the bracket 17, which is used to detect the position for executing bar 6 Set state.It can detect the location status of the valve rod of the execution bar 6 connection in this way, and when the locator 18 is connect with control system, The detected signal results of locator 18, which can be fed back, gives control system.

Further, the locator 18 is fixedly mounted on strutbeam 17-3, is provided in 18 induction end of locator By wiper arm 19, it should be equipped with bar shaped allocating slot 19-1 by wiper arm 19, plugged in bar shaped allocating slot 19-1 and stir pin 20, this stirs pin 20 One end is connect by linking arm 21 with the upper connecting rod 14, clasp nut 15 or lower connecting rod 16.In the present embodiment, this group Dynamic 20 one end of pin is affixed by linking arm 21 and clasp nut 15.When the execution bar 6 moves, it can be driven by the linking arm 21 This is stirred pin 20 and slides in bar shaped allocating slot 19-1 and this is forced to be driven 18 induction end of locator to turn by 19 one end of wiper arm Dynamic, which detects the different action states and situation of the execution bar 6 according to the angle and direction of rotation.

The preferred embodiments of the present invention have been described in detail above.It should be appreciated that the ordinary skill people of this field Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks Technical staff passes through logic analysis, reasoning or limited reality according to the design of the utility model on the basis of existing technology in domain Available technical solution is tested, it all should be within the scope of protection determined by the claims.

Claims (10)

1. a kind of valve pneumatic actuator, it is characterised in that: including upper membrane cover (1), lower membrane cover (2), flexible sheet (3), film Tablet tray (4), executes bar (6), upper limit part (7) and lower limit part (8) at multiple springs (5)；

Membrane cover (1) merges with lower membrane cover (2) and is formed with an inner cavity on this, which is located on this membrane cover (1) under Epicoele (N) and cavity of resorption (M) are divided between membrane cover (2) and by the inner cavity；

The diaphragm support (4) is amplexiformed in the flexible sheet (3) lower surface, which is connected to the diaphragm support (4) and is somebody's turn to do Between lower membrane cover (2) and each spring (5) is circumferentially distributed along the diaphragm support (4)；

The lower limit part (8) is amplexiformed in the diaphragm support (4) lower surface, which is equipped with the first elastic cushion (9)；

The upper limit part (7) is amplexiformed in the diaphragm (3) upper surface, which is equipped with the second elastic cushion (10)；

Execution bar (6) upper end and the diaphragm support (4) are affixed, which is pierced by the lower membrane cover (2).

2. a kind of valve pneumatic actuator as described in claim 1, it is characterised in that: the lower limit part (8) is plate-like Or tubular, first elastic cushion (9) they are ring-type, first elastic cushion (9) card is set or is set on the lower limit part (8).

3. a kind of valve pneumatic actuator as claimed in claim 2, it is characterised in that: on lower limit part (8) side wall Open up air equalizer opening (8-1).

4. a kind of valve pneumatic actuator as claimed in any one of claims 1-3, it is characterised in that: the upper limit part It (7) is plate-like or tubular, which is ring-type, and second elastic cushion (10) card sets or be set in the upper limit On part (7).

5. a kind of valve pneumatic actuator as described in claim 1, it is characterised in that: the spring (5) have 6-8 and Each spring (5) is circumferentially to be uniformly distributed along the diaphragm support (4).

6. a kind of valve pneumatic actuator as described in claim 1, it is characterised in that: diaphragm support (4) lower surface Upper spring seat (12) are installed with, which is installed with lower spring cup (13), spring (5) upper end and bullet on this Spring abutment (12) abuts, which abuts with the lower spring cup (13).

7. a kind of valve pneumatic actuator as described in claim 1, it is characterised in that: execution bar (6) lower end passes through upper Connecting rod (14) is connect with clasp nut (15), which is connect by lower connecting rod (16) with valve rod.

8. a kind of valve pneumatic actuator as claimed in claim 7, it is characterised in that: fixed below the lower membrane cover (2) There are bracket (17)；

The bracket (17) includes the seat of honour (17-1), lower seat (17-2) and strutbeam (17-3), the seat of honour (17-1) and lower seat (17-2) It is spaced apart up and down, which fixes as one with lower seat (17-2) through the strutbeam (17-3), which opens Equipped with upper perforation (17-11), the upper connecting rod (14) and upper perforation (17-11) are cooperatively connected, which offers down It perforates (17-21), the lower perforation (17-21) and upper perforation (17-11) are concentric.

9. a kind of valve pneumatic actuator as claimed in claim 8, it is characterised in that: it is fixed to be equipped on the bracket (17) Position device (18), the locator (18) are used to detect the location status for executing bar (6).

10. a kind of valve pneumatic actuator as claimed in claim 9, it is characterised in that: the fixed peace of the locator (18) It on the strutbeam (17-3), is provided in locator (18) induction end by wiper arm (19), item should be equipped with by wiper arm (19) Shape allocating slot (19-1), interior plug of the bar shaped allocating slot (19-1) stir pin (20), this is stirred pin (20) one end and passes through linking arm (21) It is connect with the upper connecting rod (14), clasp nut (15) or lower connecting rod (16).