CN208565728U - Electropneumatic valve positioner adjustment mechanism and electropneumatic valve positioner - Google Patents

Abstract

The utility model discloses a kind of electropneumatic valve positioner adjustment mechanisms and electropneumatic valve positioner, wherein the adjustment mechanism includes bottom case, movable part and feedback mechanism, and movable part is set in bottom case and can move between the first position and the second position；Feedback mechanism includes resetting shaft, potentiometer, driving gear and driven gear, resetting shaft is vertically extended and is pivotally arranged on bottom case around own axes, potentiometer is set on movable part, and driving gear is set to the upper end of resetting shaft, and driven gear is set in the shaft of potentiometer；When movable part is located at first position, driven wheel is engaged with driving wheel, and when movable part moves to the second position from first position, driven wheel is separated with driving wheel.According to electropneumatic valve positioner provided by the embodiment of the utility model adjustment mechanism, the adjustment of feedback mechanism may be implemented, it is simple to adjust very convenient structure.

Description

Electropneumatic valve positioner adjustment mechanism and electropneumatic valve positioner

Technical field

The utility model relates to electrical valve technical field more particularly to a kind of electropneumatic valve positioner adjustment mechanism and Electropneumatic valve positioner.

Background technique

Electropneumatic valve positioner is the main accessories of pneumatic control valve, is usually matched with pneumatic control valve, electrical valve Door holder is connected with actuator (generally cylinder etc.), and actuator is connected with pneumatic control valve, is pushed by actuator pneumatic Valve rod in regulating valve is mobile and then changes opening size, and electropneumatic valve positioner and actuator link, and then will pneumatically adjust The displacement of valve rod of section valve is converted to electric signal, and the electric signal is fed back to controller, and controller believes the electric signal and setting It number is compared, when the two has deviation, controller changes its output signal for arriving actuator, acts actuator, and then adjust The aperture of pneumatic control valve is saved to setting value.In other words, valve positioner is the signal using displacement of valve rod as feedback control, into And realize the feedback control to pneumatic control valve.

In the related technology, the displacement signal of valve rod is converted into electric signal by feedback mechanism by electropneumatic valve positioner, should Electric signal is the aperture for reacting pneumatic control valve, be that is to say, the aperture of the electric signal and pneumatic control valve is at corresponding relationship.So And before the use, need to carry out feedback mechanism adjustment, so that the displacement of electric signal and valve rod that feedback mechanism generates is pairs of The relationship answered, still, the adjustment of feedback mechanism are extremely convenient, and therefore, the convenience and reliability used is relatively low, need It is further improved.

Utility model content

The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality It is to propose a kind of electropneumatic valve positioner adjustment mechanism with a novel purpose.

Another purpose of the utility model is to propose a kind of electropneumatic valve positioner.

To achieve the above object, on the one hand, according to the electropneumatic valve positioner of the utility model embodiment adjustment mechanism, Include:

Bottom case；

Movable part, the movable part are set in the bottom case and can move between the first position and the second position；

Feedback mechanism, the feedback mechanism include resetting shaft, potentiometer, driving gear and driven gear, the resetting shaft It vertically extends and is pivotally arranged on the bottom case around own axes, the potentiometer is set to the movable part On, the driving gear is set to the upper end of the resetting shaft, and the driven gear is set in the shaft of the potentiometer；

When the movable part is located at first position, the driven wheel is engaged with the driving wheel, when the movable part from When the first position moves to the second position, the driven wheel is separated with the driving wheel.

According to electropneumatic valve positioner provided by the embodiment of the utility model adjustment mechanism, potentiometer is mounted on movable part On, it can be moved with movable part, therefore, when needing adjustment, active force can be applied, movable part is moved from first position To the second position, at this point, the driven gear in the shaft of potentiometer is separated with the driving gear on resetting shaft, then manual toggle from Moving gear so that driven gear drive potentiometer shaft rotation, and then adjust the potentiometer shaft initial angle to The current aperture of pneumatic control valve is corresponding, then the electric signal of potentiometer output can be closed with the aperture of pneumatic control valve at corresponding System, then movable part is back to first position from the second position, so that on the driven gear and resetting shaft in the shaft of potentiometer Driving gear restore to meshing state, in this way, its adjusting is very convenient, do not need disassembly potentiometer etc., meanwhile, structure Simply.

One embodiment according to the present utility model, the movable part include:

Pivotal part, the pivotal part vertically extend and around own axes the first position and the second position it Between be pivotally arranged on the bottom case；

Transmission arm, one end of the transmission arm are connect with the pivotal part, to be rotated with the pivotal part, the transmission arm The other end it is horizontally extending；

The potentiometer is set to the other end of the transmission arm.

One embodiment according to the present utility model, further includes:

Dynamic clamping head and quiet clamping head, the dynamic clamping head and quiet clamping head are located between the movable part and the bottom case, and often drive the work Moving part is moved from the second position to the first position.

One embodiment according to the present utility model, the pivotal part include:

Locating rod, the lower end of the locating rod are fixed on the bottom case；

Pivot sleeve, the pivot sleeve are sheathed on the upper end of the locating rod and around own axes in the first position and Between two positions pivotably；

Described one end of the transmission arm and the circumferentially fixed connection of the pivot sleeve.

One embodiment according to the present utility model, the dynamic clamping head and quiet clamping head are torsional spring, and the torsion spring set is set to the pivot Outside pivoted housing, and one end of the torsional spring is mutually fixed with the transmission arm, and the other end of the torsional spring is mutually fixed with the bottom case.

One embodiment according to the present utility model, the transmission arm are formed as horizontally disposed plate-like piece, the plate Part is gradually increased from one end to other end size, and described one end of the pivotal part and the plate-like piece is circumferentially fixed, the electricity Position device is located at the other end of the plate-like piece.

One embodiment according to the present utility model, the other end of the plate-like piece, which is equipped with, prolongs up and down direction through institute The through-hole of plate-like piece is stated, the potentiometer is fixed on the bottom surface of the plate-like piece by fastener, and the shaft of the potentiometer is certainly The through-hole is connected after stretching out upwards with the driven gear.

One embodiment according to the present utility model, is equipped with first boss protruding upward in the bottom case, and described first The top surface of boss is equipped with threaded hole, and the lower end of the locating rod is equipped with the external screw thread being threadedly engaged with the threaded hole.

The side protrusion of one embodiment according to the present utility model, the transmission arm is formed with stop section, the torsional spring Described one end offset with the stop section.

On the other hand, according to the electropneumatic valve positioner of the utility model embodiment, have electrical valve as described above fixed Position device adjustment mechanism.

According to electropneumatic valve positioner provided by the embodiment of the utility model, there is above-mentioned adjustment mechanism, it therefore, can be with It is conveniently adjusted the initial angle of potentiometer, so that the displacement of the electric signal and valve rod of potentiometer output is closed at one-to-one System, it is easy to adjust, disassembly potentiometer etc. is not needed, meanwhile, structure is simple.

The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the structural schematic diagram of the utility model embodiment electropneumatic valve positioner adjustment mechanism；

Fig. 2 is the exploded view of the utility model embodiment electropneumatic valve positioner adjustment mechanism；

Fig. 3 is the top view of the utility model embodiment electropneumatic valve positioner adjustment mechanism；

Appended drawing reference:

Bottom case 10；

Second boss 101；

First boss 102；

Movable part 20；

Pivotal part 201；

Locating rod 2011；

External screw thread 2012；

Pivot sleeve 2012；

Transmission arm 202；

Stop section 2021；

Dynamic clamping head and quiet clamping head 21；

Feedback mechanism 30；

Resetting shaft 301；

Driving gear 302；

Driven gear 303；

Potentiometer 304.

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation, based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise " " axial direction ", " circumferential direction ", " radial direction " is orientation based on the figure Or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning or Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model System.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be Concrete meaning in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.

The electropneumatic valve positioner adjustment mechanism of the utility model embodiment is described in detail with reference to the accompanying drawings.

Referring to figs. 1 to shown in Fig. 3, according to electropneumatic valve positioner provided by the embodiment of the utility model adjustment mechanism, Including bottom case 10, movable part 20 and feedback mechanism 30.

Specifically, movable part 20 is set in the bottom case 10 and can move between the first position and the second position.

Feedback mechanism 30 includes resetting shaft 301, potentiometer 304, driving gear 302 and driven gear 303, wherein feedback Axis 301 is vertically extended and is pivotally arranged on the bottom case 10 around own axes.In Fig. 2 example, in bottom case 10 Equipped with second boss 101, the second boss 101 is equipped with pivoting hole, and the pivot is pivotably arranged in the lower end of resetting shaft 301 In turn hole.In specific application, the lower end of resetting shaft 301 is can connect after stretching out from pivoting hole to actuator, actuator connection Pneumatic control valve can drive the valve rod of pneumatic control valve to act when actuator movement, and then adjust opening for pneumatic control valve Degree, meanwhile, when actuator acts, resetting shaft 301 can be driven to rotate.

Potentiometer 304 is set on the movable part 20, and the driving gear 302 is set to the upper of the resetting shaft 301 End, the driven gear 303 are set in the shaft of the potentiometer 304.When the movable part 20 is located at first position, institute Driven wheel is stated to engage with the driving wheel, when the movable part 20 moves to the second position from the first position, institute Driven wheel is stated to separate with the driving wheel.

That is, potentiometer 304 is located on movable part 20 can move with movable part 20, when movable part 20 is located at first When position, the relatively close resetting shaft 301 of potentiometer 304 on movable part 20, the driven gear 303 in the shaft of potentiometer 304 is rigid It is good to be engaged with the driving gear 302 on resetting shaft 301.At this point, resetting shaft 301 can be driven to rotate if actuator acts, Resetting shaft 301 drives driving gear 302 to rotate, and driving gear 302 is further driven to the rotation of driven gear 303, finally, by driven Gear 303 drives the shaft rotation of potentiometer 304, in this way, potentiometer 304 can produce electric signal, that is, realizes actuator Displacement is converted to electric signal.

And when movable part 20 moves to the second position from first position, the potentiometer 304 on movable part 20 is far from feedback Axis 301, the driven gear 303 in the shaft of potentiometer 304 are then separated with the driving gear 302 on resetting shaft 301, then driven tooth Wheel 303 will not follow resetting shaft 301 to rotate.At this point it is possible to manual toggle driven gear 303, so that driven gear 303 drives electricity The shaft rotation of position device 304.

According to electropneumatic valve positioner provided by the embodiment of the utility model adjustment mechanism, potentiometer 304 is mounted on work It on moving part 20, can be moved with movable part 20, therefore, when needing adjustment, active force can be applied and make movable part 20 from One position moves to the second position, at this point, the driven gear 303 in the shaft of potentiometer 304 and the driving tooth on resetting shaft 301 302 separation of wheel, then manual toggle driven gear 303 so that driven gear 303 drives the shaft rotation of potentiometer 304, and then are adjusted The initial angle for saving the shaft of the potentiometer 304 is extremely corresponding with the current aperture of pneumatic control valve, such as pneumatic control valve Current aperture is zero, the initial angle zero of the corresponding shaft by potentiometer 304, then the electric signal that potentiometer 304 exports is Can with the aperture of pneumatic control valve at corresponding relationship, finally, movable part 20 is back to first position from the second position again so that Driven gear 303 and the recovery of driving gear 302 on resetting shaft 301 to meshing state in the shaft of potentiometer 304, such as This, adjusting is very convenient, disassembly potentiometer 304 etc. is not needed, meanwhile, structure is simple.

In addition, feedback mechanism 30 is formed by resetting shaft 301, driving gear 302, driven gear 303 and potentiometer 304, The displacement of actuator accurately can be converted into electric signal, the result of feedback is relatively reliable so that controller according to The electric signal can accurately control actuator, reach accurate feedback regulation control.

It should be noted that potentiometer 304 is converted to electric signal for that will be displaced, which can be using conduction Displacement signal, can be converted into voltage signal by plastic potentiometer 304, and displacement signal is proportional with voltage signal.

Referring to figs. 1 to shown in Fig. 2, in some embodiments of the utility model, movable part 20 includes pivotal part 201 and connection Swing arm 202, wherein pivotal part 201 vertically extends and around own axes between the first position and the second position It is pivotally arranged on the bottom case 10；One end of transmission arm 202 is connect with the pivotal part 201, with the pivotal part 201 Rotation, the other end of the transmission arm 202 are horizontally extending；Potentiometer 304 is set to the described another of the transmission arm 202 One end.

That is, pivotal part 201 is located at vertically on bottom case 10, and can be rotated around own axes, and transmission arm 202 It is horizontally disposed, also, one end of transmission arm 202 is connected on pivotal part 201, when pivotal part 201 is rotated around own axes, connection Swing arm 202 follows pivotal part 201 to rotate.And potentiometer 304 is located at the other end of transmission arm 202, then when transmission arm 202 rotates, Potentiometer 304 can be driven to rotate with the axis of pivotal part 201.

Active force when specific operation, can applied on transmission arm 202, driving transmission arm 202 with the axis of pivotal part 201 It is rotated centered on line, such as along when rotating clockwise, potentiometer 304 moves closer to resetting shaft 301, so that driven gear 303 engage with driving gear 302, and when rotating counterclockwise, potentiometer 304 is gradually distance from resetting shaft 301, so that driven tooth Wheel 303 is separated with driving gear 302, and rotation is reliable, it can be ensured that and driven gear 303 is engaged or is separated with driving gear 302, this Outside, structure is simple, easy to assembly.

It further include dynamic clamping head and quiet clamping head 21 in some embodiments of the utility model, the dynamic clamping head and quiet clamping head 21 is located at institute It states between movable part 20 and the bottom case 10, and the movable part 20 is often driven to transport from the second position to the first position It is dynamic.

That is, dynamic clamping head and quiet clamping head 21 is located between movable part 20 and bottom case 10, elastic acting force can be provided, the bullet Property active force act on movable part 20 so that movable part 20 can close on resetting shaft 301 under other external forces, So that the holding of driven gear 303 is engaged with driving gear 302.

When specifically used, when application effect power drive movable part 20 moves to the second position, driven gear 303 and master Moving gear 302 separates, and dynamic clamping head and quiet clamping head 21 generates deformation, and after cancelling above-mentioned active force, the release of dynamic clamping head and quiet clamping head 21 resets, into And automatic movable part 20 is forced to be back to first position from the second position, so that driven gear 303 is nibbled with the recovery of driving gear 302 It closes, in this way, its is more convenient to use, and, it is ensured that driven gear 303 engages relatively reliable with driving gear 302.

In one embodiment of the utility model, pivotal part 201 includes locating rod 2011 and pivot sleeve 2012, wherein The lower end of locating rod 2011 is fixed on the bottom case 10；Pivot sleeve 2012 is sheathed on the upper end of the locating rod 2011 and around certainly Body axis are pivotable between the first position and the second position；Described one end of transmission arm 202 and the pivot sleeve 2012 Circumferentially fixed connection.

That is, locating rod 2011 is fixedly mounted on vertically in bottom case 10,2012 sets of pivot sleeve in locating rod 2011 And can be rotated along own axes, and transmission arm 202 is connected and is rotated in pivot sleeve 2012 with pivot sleeve 2012, in this way, it is assembled It is convenient, also, the rotation of pivot sleeve 2012 is more smoothly reliable.

Preferably, dynamic clamping head and quiet clamping head 21 is torsional spring, and the torsion spring set is set to outside the pivot sleeve 2012, and the torsion One end of spring is fixed with 202 phase of transmission arm, and the other end of the torsional spring is fixed with the phase.In this way, apply active force in On transmission arm 202, when rotating it from first position to the second position, torsional spring twists deformation, and when cancelling active force, Torsional spring can restore deformation and transmission arm 202 is forced to be back to first position from the second position, and reseting performance is relatively reliable.

In an example of the utility model, transmission arm 202 is formed as horizontally disposed plate-like piece, the plate-like piece from One end to other end size is gradually increased, and described one end of the pivotal part 201 and the plate-like piece is circumferentially fixed, the current potential Device 304 is located at the other end of the plate-like piece.

That is, the size of one end of transmission arm 202 is less than the size of the other end, wherein size relatively small one End is fixed on pivotal part 201, and larger-size one end is used to install potentiometer 304, in this way, structure can be made more to step up It gathers, meanwhile, it is convenient to the connection of transmission arm 202 and pivotal part 201 and the installation of potentiometer 304.

More specifically, the other end of plate-like piece, which is equipped with, prolongs the through-hole that up and down direction runs through the plate-like piece, described Potentiometer 304 is fixed on the bottom surface of the plate-like piece by fastener, and the shaft of the potentiometer 304 is stretched upwards from the through-hole It is connected after out with the driven gear 303, in this way, its structure is simpler compact, it is easy to assembly.

In an example of the utility model, first boss 102 protruding upward is equipped in bottom case 10, described first is convex The top surface of platform 102 is equipped with threaded hole, and the lower end of the locating rod 2011 is equipped with the external screw thread being threadedly engaged with the threaded hole 2012, it is fixed in bottom case 10 in this way, being convenient to locating rod 2011, while assembling simple.

In one embodiment of the utility model, the side protrusion of transmission arm 202 is formed with stop section 2021, the torsion Described one end of spring offsets with the stop section 2021, in this way, the both ends for being convenient to torsional spring are fixed with transmission arm 202 respectively.

According to the electropneumatic valve positioner of the utility model embodiment, there is electropneumatic valve positioner adjustment as described above Mechanism.

It should be noted that other compositions of electropneumatic valve positioner and operation are for ability according to embodiments of the present invention All it is known, such as piezo electric valve, controller etc. for the those of ordinary skill of domain, is not detailed herein.

According to electropneumatic valve positioner provided by the embodiment of the utility model, there is above-mentioned adjustment mechanism, it therefore, can be with It is conveniently adjusted the initial angle of potentiometer 304, so that the displacement of electric signal and valve rod that potentiometer 304 exports is at one-to-one correspondence Relationship, it is easy to adjust, do not need disassembly potentiometer 304 etc., meanwhile, structure is simple.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into Row combination and combination.

The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model, Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (10)

1. a kind of electropneumatic valve positioner adjustment mechanism characterized by comprising

Bottom case；

Movable part, the movable part are set in the bottom case and can move between the first position and the second position；

Feedback mechanism, the feedback mechanism include resetting shaft, potentiometer, driving gear and driven gear, and the resetting shaft is along upper Lower direction extends and is pivotally arranged on the bottom case around own axes, and the potentiometer is set on the movable part, institute The upper end that driving gear is set to the resetting shaft is stated, the driven gear is set in the shaft of the potentiometer；

When the movable part is located at first position, the driven gear is engaged with the driving wheel, when the movable part is from institute When stating first position and moving to the second position, the driven gear is separated with the driving gear.

2. electropneumatic valve positioner according to claim 1 adjustment mechanism, which is characterized in that the movable part includes:

Pivotal part, the pivotal part vertically extend and can between the first position and the second position around own axes It is pivotally located on the bottom case；

Transmission arm, one end of the transmission arm are connect with the pivotal part, with the pivotal part rotate, the transmission arm it is another One end is horizontally extending；

The potentiometer is set to the other end of the transmission arm.

3. electropneumatic valve positioner according to claim 2 adjustment mechanism, which is characterized in that further include:

Dynamic clamping head and quiet clamping head, the dynamic clamping head and quiet clamping head are located between the movable part and the bottom case, and often drive the movable part It is moved from the second position to the first position.

4. electropneumatic valve positioner according to claim 3 adjustment mechanism, which is characterized in that the pivotal part includes:

Locating rod, the lower end of the locating rod are fixed on the bottom case；

Pivot sleeve, the pivot sleeve are sheathed on the upper end of the locating rod and around own axes in the first position and second Between setting pivotably；

Described one end of the transmission arm and the circumferentially fixed connection of the pivot sleeve.

5. electropneumatic valve positioner according to claim 4 adjustment mechanism, which is characterized in that the dynamic clamping head and quiet clamping head is Torsional spring, the torsion spring set is set to outside the pivot sleeve, and one end of the torsional spring is mutually fixed with the transmission arm, the torsional spring The other end is mutually fixed with the bottom case.

6. electropneumatic valve positioner according to claim 2 adjustment mechanism, which is characterized in that the transmission arm is formed as Horizontally disposed plate-like piece, the plate-like piece are gradually increased from one end to other end size, the pivotal part and the plate-like piece Described one end it is circumferentially fixed, the potentiometer is located at the other end of the plate-like piece.

7. electropneumatic valve positioner according to claim 6 adjustment mechanism, which is characterized in that the plate-like piece it is described The other end, which is equipped with, prolongs the through-hole that up and down direction runs through the plate-like piece, and the potentiometer is fixed on the plate-like piece by fastener Bottom surface, the shaft of the potentiometer is connected after stretching out upwards from the through-hole with the driven gear.

8. electropneumatic valve positioner according to claim 4 adjustment mechanism, which is characterized in that be equipped in the bottom case to The first boss protruded above, the top surface of the first boss are equipped with threaded hole, and the lower end of the locating rod is equipped with and the screw thread The external screw thread that hole is threadedly engaged.

9. electropneumatic valve positioner according to claim 5 adjustment mechanism, which is characterized in that the side of the transmission arm Protrusion is formed with stop section, and described one end and the stop section of the torsional spring offset.

10. a kind of electropneumatic valve positioner, which is characterized in that have the electrical valve as described in any one of claims 1 to 9 fixed Position device adjustment mechanism.