Valve position fixing device

Abstract

The utility model relates to valve maintenance equipment, and discloses a valve position fixing device which comprises a support, the support comprises a first supporting rod and a second supporting rod which are oppositely arranged, and a first adjusting mechanism is arranged between the first supporting rod and the second supporting rod. The first supporting rod and the second supporting rod are movably installed on the base and used for adjusting the interval between the first supporting rod and the second supporting rod, and a first supporting plate, a second supporting plate and a third supporting plate are movably installed on the first supporting rod and the second supporting rod. Supporting pieces are arranged between the third supporting plate and the first supporting plate and / or between the third supporting plate and the second supporting plate so as to limit the moving freedom degree of the third supporting plate, the valve position of the adjusting valve can be fixed when the adjusting valve loses air source power, and online maintenance work of adjusting valve accessories can be conveniently carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve maintenance equipment, concretely relates to a valve position fixing device. BACKGROUND

[0002] With the development of intelligentization of petroleum chemical industry, the automatic control level of factory is continuously improved, and the number of pneumatic regulating valves matched with intelligent positioners in the device is also continuously increased. Because of the instrument air source pipe, joint and instrument air filter pressure reducing valve and other accessories of the pneumatic regulating valve, the air source joint leakage, the damage of the pressure reducing valve, pressure gauge and other gas path accessories by collision, the intelligent positioner of the regulating valve also has the fault and needs to be replaced, and when similar problems are handled, the air source of the regulating valve needs to be cut off, if the valve does not have a hand wheel adjusting mechanism, the valve position of the single-acting regulating valve will become a fault position, which causes fluctuations in the production of the device.

[0003] At present, the main processing mode of operation is to switch the process medium to the auxiliary line for operation, and the whole regulating valve is cut off for online processing, but the regulating valve of the high-pressure part such as the hydrogenation device usually does not have an auxiliary line, and cannot realize online cutting processing, so the device needs to be shut down or partially shut down for operation. The low-pressure regulating valve has an auxiliary line to meet the condition of cutting the regulating valve, but each cutting of the regulating valve may cause disturbance to the process production, and the cutting of the regulating valve needs to occupy more manpower, and the workload is large. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a valve position fixing device, which can fix the valve position of the regulating valve when the regulating valve loses air source power, and facilitate the online maintenance work of the regulating valve accessories.

[0005] In order to solve the above technical problems, the utility model provides a valve position fixing device, including support, the support includes first support rod and second support rod who sets up oppositely, first support rod with second support rod between setting has first adjusting mechanism, for adjusting the interval between first support rod with second support rod, first support plate, first support plate movable setting in first support rod with second support rod, and first support rod with second support rod each corresponding first support plate set up oppositely, second support plate, second support plate movable setting in first support rod with second support rod, and first support rod with second support rod each corresponding second support plate set up oppositely, third support plate, third support plate movable setting in first support rod with second support rod, third support plate is located between first support plate with second support plate, and first support rod with second support rod each corresponding third support plate set up oppositely, wherein, the third support plate with first support plate between and / or the third support plate with second support plate between setting has support piece, to limit the movement degree of freedom of third support plate.

[0006] Preferably, the first support plate, the second support plate and the third support plate on the same side are formed with mounting holes for the first support rod to pass through, and the first support plate, the second support plate and the third support plate on the other side are formed with mounting holes for the second support rod to pass through, and the first support rod and the second support rod are both screw rods, and a plurality of support adjusting nuts for limiting the movement degree of freedom of the first support plate, the second support plate and the third support plate are threadedly connected to the screw rods.

[0007] Preferably, the first adjusting mechanism comprises a first adjusting screw and a plurality of adjusting locking nuts, the first adjusting screw is arranged between the oppositely arranged first support plates, and the two first support plates are movably sleeved on the first adjusting screw; and / or the first adjusting screw is arranged between the oppositely arranged second support plates, and the two second support plates are movably sleeved on the first adjusting screw; and / or the first adjusting screw is arranged between the oppositely arranged third support plates, and the two third support plates are movably sleeved on the first adjusting screw; and a plurality of adjusting locking nuts are threadedly connected to the first adjusting screw to limit the movement degree of freedom of the component movably sleeved on the upper part of the first adjusting screw.

[0008] Further preferably, the first support plate and / or the second support plate and / or the third support plate are formed with mounting holes for the first adjusting screw to pass through.

[0009] Preferably, the support member comprises a second adjusting screw movably mounted on the third support plate and a support locking nut threadedly connected on the second adjusting screw.

[0010] Further preferably, each of the third support plates is provided with a through hole, the second adjusting screw is movably mounted in the through hole, and the two ends of the second adjusting screw can respectively extend out of the two sides of the through hole to be used for abutting against the first support plate and the second support plate respectively.

[0011] Preferably, the opposite sides of the two third support plates are respectively formed with protrusions.

[0012] Preferably, the opposite sides of the two third support plates are movably provided with adjusting blocks, and the adjusting blocks are adapted to move towards the middle of the two third support plates.

[0013] Further preferably, the adjusting blocks are provided with push rods, the push rods are movably sleeved with locking members, the third support plates are formed with mounting holes through which the push rods pass, one end of the push rod extending out of the mounting hole is connected with the adjusting block, and the other end is threadedly connected with a push rod locking member.

[0014] Preferably, an elastic member is provided between the adjusting block and the third support plate, and the elastic member is sleeved on the push rod.

[0015] By the above technical solution, the valve position fixing device is provided, which comprises a support, the support comprises oppositely arranged first and second support rods, a first adjusting mechanism is arranged between the first and second support rods to adjust the interval between the first and second support rods, first, second and third support plates are movably mounted on the first and second support rods, wherein a support member is arranged between the third support plate and the first support plate and / or between the third support plate and the second support plate to limit the movement degree of freedom of the third support plate, the support of the valve position fixing device is placed close to the horse frame of the regulating valve, the distance between the first and second support rods is adjusted by the first adjusting mechanism to be suitable for the size of the regulating valve, the first and second support plates abut against the horse frame to ensure that the device stably abuts against the regulating valve, the third support plate is moved along the first and second support rods to a proper position, so that the third support plate can accurately align and be ready to clamp the valve rod, push rod or other components to be fixed, thereby fixing the valve position of the regulating valve, the valve position of the regulating valve can be fixed when the regulating valve loses the power of the gas source, and the online maintenance work of the regulating valve accessories can be facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 is a specific embodiment of the present application, which discloses a structure schematic view of a support;

[0018] Figure 2 is a specific embodiment of the present application, which discloses a structure schematic view of a third support plate;

[0019] Figure 3 is another specific embodiment of the present application, which discloses a structure schematic view of a third support plate;

[0020] Figure 4 is a structure schematic view of an adjusting valve tool of a specific embodiment of the present application;

[0021] Figure 5 is a structure schematic view of an adjusting valve tool of a specific embodiment of the present application; Figure 4 is a front view of the adjusting valve tool.

[0022] Explanation of reference signs:

[0023] 1, support; 1-1, first support rod; 1-2, second support rod; 1-3, support adjusting nut; 2, first support plate; 3, third support plate; 3-1, protrusion; 3-2, through hole; 4, second support plate; 5, first adjusting mechanism; 5-1, first adjusting screw; 5-2, nut; 6, support piece; 6-1, second adjusting screw; 6-2, support locking nut; 7, adjusting valve; 8, adjusting block; 9, push rod; 10, locking piece; 11, elastic piece. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be further described in detail below in combination with the drawings and examples. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, and the present application can be realized in many different forms, and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims. The directions or position relationships indicated by "up", "down", "inner", "outer" and the like are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements indicated thereby must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the present application. When the absolute position of the described object is changed, the relative position relationship may also be changed accordingly.

[0025] In addition, the "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different parts. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0026] It should be further pointed out that in the description of the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device.

[0027] All the terms used in the utility model have the same meaning as understood by ordinary skilled persons in the field to which the utility model belongs, unless otherwise specifically defined. It should also be understood that the terms defined in, such as general dictionaries, should be interpreted to have meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or extremely formalized sense, unless otherwise defined here.

[0028] The technology, method and equipment known to ordinary skilled persons in the relevant field can not be discussed in detail, but the technology, method and equipment should be regarded as part of the specification under appropriate circumstances.

[0029] Reference Figure 1 , Figure 4 and Figure 5The utility model provides a kind of valve position fixing device, including support 1, support 1 includes oppositely arranged first support rod 1-1 and second support rod 1-2, first support rod 1-1 and second support rod 1-2 between being provided with first adjusting mechanism 5, to adjust the interval between first support rod 1-1 and second support rod 1-2;First support plate 2, first support plate 2 can be movably set on first support rod 1-1 and second support rod 1-2, and first support rod 1-1 and second support rod 1-2 each corresponding first support plate 2 is oppositely arranged, second support plate 4 can be movably set on first support rod 1-1 and second support rod 1-2, and first support rod 1-1 and second support rod 1-2 each corresponding second support plate 4 is oppositely arranged, third support plate 3 can be movably set on first support rod 1-1 and second support rod 1-2, third support plate 3 is between first support plate 2 and second support plate 4, and first support rod 1-1 and second support rod 1-2 each corresponding third support plate 3 is oppositely arranged, wherein support 6 is arranged between third support plate 3 and first support plate 2 and / or between third support plate 3 and second support plate 4, to limit the movement degree of freedom of third support plate 3, the support 1 of valve position fixing device is placed close to the horse frame of regulating valve 7, the distance between first support rod 1-1 and second support rod 1-2 is adjusted by first adjusting mechanism 5, so that it is suitable for the size of regulating valve, first support plate 2 and second support plate 4 abut on horse frame, ensure that device stably abuts on regulating valve, third support plate 3 is moved to appropriate position along first support rod 1-1 and second support rod 1-2, so that third support plate 3 can accurately align and prepare to jam valve rod, push rod or other parts needing to be fixed, to fix the valve position of regulating valve, the valve position of regulating valve can be fixed when losing gas source power, facilitate to carry out the on-line maintenance work of regulating valve accessory.

[0030] In some embodiments, the first support plate 2, the second support plate 4 and the third support plate 3 on the same side are formed with mounting holes for the first support rod 1-1 to pass through, and the first support plate 2, the second support plate 4 and the third support plate 3 on the other side are formed with mounting holes for the second support rod 1-2 to pass through, the first support rod 1-1 and the second support rod 1-2 are both screw rods, a plurality of support adjusting nuts 1-3 for limiting the movement degree of freedom of the first support plate 2, the second support plate 4 and the third support plate 3 are threadedly connected to the screw rods, the first support plate 2, the second support plate 4 and the third support plate 3 can move in the direction of the first support rod 1-1 or the second support rod 1-2, which makes the valve position fixing device flexible to adjust according to regulating valves of different sizes, increasing the application range of the equipment, when the support adjusting nuts 1-3 are tightened, they can provide strong clamping force, ensuring that the support plates will not be unnecessarily displaced on the support rods, thereby improving the stability and reliability of the entire device.

[0031] In some embodiments, the first adjusting mechanism 5 comprises a first adjusting screw 5-1 and a plurality of adjusting locking nuts 5-2, the first adjusting screw 5-1 is arranged between the first support plates 2 arranged oppositely, and the two first support plates 2 are movably sleeved on the first adjusting screw 5-1; and / or the first adjusting screw 5-1 is arranged between the second support plates 4 arranged oppositely, and the two second support plates 4 are movably sleeved on the first adjusting screw 5-1; and / or the first adjusting screw 5-1 is arranged between the third support plates 3 arranged oppositely, and the two third support plates 3 are movably sleeved on the first adjusting screw 5-1, wherein the plurality of adjusting locking nuts 5-2 are threadedly connected on the first adjusting screw 5-1 to limit the movement freedom of the components movably sleeved on the first adjusting screw 5-1, the first support plates 2 arranged oppositely, the second support plates 4 arranged oppositely and the third support plates 3 arranged oppositely are respectively at the same horizontal position, which ensures uniform distribution of stress and further enhances the stability and reliability of the device, the first support plates 2, the second support plates 4 and the third support plates 3 can move along the direction of the first adjusting screw 5-1, the structure is more stable, and the distance between the support plates (i.e. the first support plates 2, the third support plates 3 and the second support plates 4) can be adjusted according to actual needs, which provides great flexibility for adjusting valves of different sizes or shapes.

[0032] In some embodiments, the first adjusting screw 5-1 passes through the mounting holes formed on the first support plates 2 and / or the second support plates 4 and / or the third support plates 3, the first adjusting screw 5-1 passes through the mounting holes on the support plates to ensure the close fit between the first adjusting screw 5-1 and the first support plates 2 and / or the second support plates 4 and / or the third support plates 3, and at the same time the first adjusting screw 5-1 provides a fixed path for the support plates, which helps to improve the adjusting accuracy of the first adjusting mechanism 5.

[0033] In some embodiments, the support 6 comprises a second adjusting screw 6-1 and a support locking nut 6-2, the second adjusting screw 6-1 is movably installed on the third support plate 3, and the support locking nut 6-2 is threadedly connected on the second adjusting screw 6-1, the second adjusting screw 6-1 can move relative to the third support plate 3, allowing users to adjust the height according to actual needs, and the second adjusting screw 6-1 is locked by the support locking nut 6-2 to limit its movement when the height is adjusted to a suitable height, and the second adjusting screw 6-1 needs to be loosened when it needs to be adjusted, so as to adapt to the abutting of the second adjusting screw 6-1 and the first support plate 2 and / or the second support plate 4 to support the third support plate 3, which is conducive to preventing the third support plate 3 from deforming during work.

[0034] In some embodiments, each third support plate 3 is provided with a through hole 3-2, and a second adjusting screw 6-1 is movably installed in the through hole 3-2, and the two ends of the second adjusting screw 6-1 can respectively extend from both sides of the through hole 3-2 to be used for abutting against the first support plate 2 and the second support plate 4, respectively. The through hole 3-2 guarantees the movement path of the second adjusting screw 6-1, and at the same time, the through hole 3-2 ensures the position accuracy of the second adjusting screw 6-1 during installation, guarantees the contact position of the second adjusting screw 6-1 with the first support plate 2 and the second support plate 4, is suitable for maintaining the structure of the third support plate 3, and reduces the risk of damage to the third support plate 3 due to excessive stress.

[0035] In some embodiments, referring to Figure 2 , the opposite sides of the two third support plates 3 are respectively formed with protrusions 3-1, which abut against the valve stem, push rod or other components of the regulating valve, so as to be suitable for fixing the valve position of the regulating valve, and the protrusions 3-1 facilitate the third support plate 3 to fix the valve position.

[0036] In some embodiments, referring to Figure 3 , the opposite sides of the two third support plates 3 are movably provided with adjusting blocks 8, which are suitable for moving to the middle of the two third support plates 3. The adjusting blocks 8 abut against the valve stem, push rod or other components of the regulating valve, and the adjusting blocks 8 can move relative to the third support plate 3. The two adjusting blocks 8 arranged oppositely move closer to or away from each other, so as to be suitable for fixing the valve position of regulating valves of different specifications. In actual use, both of the two adjusting blocks 8 can be adjusted, or only one of the two adjusting blocks 8 can be adjusted, so as to be suitable for fixing the valve position, and fine adjustment is realized by accurately controlling the position of the adjusting block 8, thereby improving the adaptability accuracy.

[0037] In some embodiments, the adjusting block 8 is provided with a push rod 9, a locking piece 10 is movably sleeved on the push rod 9, the third support plate 3 is formed with a mounting hole through which the push rod 9 passes, one end of the push rod 9 extending out of the mounting hole is connected with the adjusting block 8, and the other end is threadedly connected with the push rod locking piece 10. The operator pushes or pulls the push rod 9 manually or by a tool. Since one end is fixed on the adjusting block 8, pushing or pulling the push rod 9 will cause the adjusting block 8 to move along the axis direction of the push rod 9. When the adjusting block 8 is adjusted to the required position, the position of the push rod 9 is fixed by tightening the locking piece 10, so as to ensure that the adjusting block 8 will not be displaced due to external force.

[0038] In some embodiments, a resilient member 11 is arranged between the adjusting block 8 and the third support plate 3, the resilient member 11 is sleeved on the push rod 9, for example, a spring, a silica gel washer or the like; the resilient member 11 generates a constant pre-tightening force between the adjusting block 8 and the third support plate 3, the resilient member 11 can absorb the impact energy externally applied to the system, reduce vibration transmission, if the adjusting block 8 is slightly displaced due to external force, the resilient member 11 can provide a restoring force to make the adjusting block 8 return to the original position, when the operating personnel manually adjusts the adjusting block 8, the force provided by the resilient member 11 can give the operating personnel a better hand feeling feedback.

[0039] In order to better understand the technical content of the utility model, the following is described in combination with the relatively preferred technical features.

[0040] The utility model provides a valve position fixing device, including support 1, support 1 includes oppositely arranged first support rod 1-1 and second support rod 1-2, is provided with first adjusting mechanism 5 between first support rod 1-1 and second support rod 1-2 to be used for adjusting the interval between first support rod 1-1 and second support rod 1-2, and first support plate 2 and second support plate 4 are movably arranged on first support rod 1-1 and second support rod 1-2, and first support plate 2 and second support plate 4 are oppositely arranged to first support rod 1-1 and second support rod 1-2 respectively, third support plate 3 is movably arranged on first support rod 1-1 and second support rod 1-2, and third support plate 3 is located between first support plate 2 and second support plate 4, and first support plate 2 and second support plate 4 are oppositely arranged to first support rod 1-1 and second support rod 1-2 respectively, wherein support 6 is arranged between third support plate 3 and first support plate 2 and between third support plate 3 and second support plate 4 to limit the movement degree of freedom of third support plate 3, the first support plate 2, the second support plate 4 and the third support plate 3 on the same side are formed with the mounting hole for first support rod 1-1 to pass through, and the first support plate 2, the second support plate 4 and the third support plate 3 on the other side are formed with the mounting hole for second support rod 1-2 to pass through, and first support rod 1-1 and second support rod 1-2 are all screw rods, a plurality of support adjusting nuts 1-3 for limiting the movement degree of freedom of first support plate 2, second support plate 4 and third support plate 3 are threadedly connected on the screw rod, first adjusting mechanism 5 includes first adjusting screw rod 5-1 and a plurality of adjusting locking nuts 5-2, first adjusting screw rod 5-1 is arranged between oppositely arranged first support plate 2, and two first support plates 2 are movably sleeved on first adjusting screw rod 5-1, first adjusting screw rod 5-1 is arranged between oppositely arranged second support plate 4, and two second support plates 4 are movably sleeved on first adjusting screw rod 5-1, first adjusting screw rod 5-1 is arranged between oppositely arranged third support plate 3, and two third support plates 3 are movably sleeved on first adjusting screw rod 5-1, wherein a plurality of adjusting locking nuts 5-2 are threadedly connected on first adjusting screw rod 5-1 to limit the movement degree of freedom of the component movably sleeved on first adjusting screw rod 5-1, first support plate 2, second support plate 4 and third support plate 3 are formed with the mounting hole for first adjusting screw rod 5-1 to pass through, support 6 includes second adjusting screw rod 6-1 and support locking nut 6-2, second adjusting screw rod 6-1 is movably installed on third support plate 3, support locking nut 6-2 is threadedly connected on second adjusting screw rod 6-1, each third support plate 3 is provided with through-hole 3-2, second adjusting screw rod 6-1 is movably installed in through-hole 3-2, and the both ends of second adjusting screw rod 6-1 can respectively extend from the both sides of through-hole 3-2 to respectively be used for abutting first support plate 2 and second support plate 4, the opposite side of two third support plates 3 is movably provided with adjusting block 8, and adjusting block 8 is suitable for moving to the middle of two third support plates 3.The adjusting block 8 is provided with a push rod 9, a locking piece 10 movably sleeved on the push rod 9, the third supporting plate 3 is formed with a mounting hole through which the push rod 9 passes, one end of the push rod 9 protruding from the mounting hole is connected with the adjusting block 8, and the other end is threadedly connected with the push rod locking piece 10, and an elastic piece 11 is arranged between the adjusting block 8 and the third supporting plate 3 and sleeved on the push rod 9.

[0041] The fixing device is used for fixing the valve position of the regulating valve, and the first adjusting mechanism 5 is controlled to adjust the distance between the first supporting rod 1-1 and the second supporting rod 1-2, the support 1 is placed in the horse frame of the regulating valve 7, the distance between the first supporting rod 1-1 and the second supporting rod 1-2 is adjusted so that the outer sides of the supporting plates (i.e., the first supporting plate 2, the third supporting plate 3 and the second supporting plate 4) abut against the horse frame, the outer sides are opposite sides of the adjusting block 8, after abutting, the adjusting locking nuts 5-2 corresponding to the first supporting plate 2 and the second supporting plate 4 are tightened, then the third supporting plate 3 is adjusted to clamp the valve position of the regulating valve, and the adjusting locking nuts 5-2 corresponding to the third supporting plate 3 are tightened again, so that the valve position is fixed, then the second adjusting screw 6-1 is adjusted to abut against the first supporting plate 2 or the second supporting plate 4 to support the third supporting plate 3, and the valve position is determined in the direction of movement of the valve position, that is, whether the second adjusting screw 6-1 abuts against the first supporting plate 2 or the second supporting plate 4, so as to facilitate the staff to fix the valve position of the regulating valve when the regulating valve loses the gas source power, and facilitate the on-line maintenance work of the regulating valve accessories.

[0042] So far, the embodiments of the utility model have been described in detail. In order to avoid shielding the concept of the utility model, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0043] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the utility model. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way.

Claims

1. A valve positioner, characterized by, Comprise: Support (1), the support (1) includes first support rod (1-1) and second support rod (1-2) arranged oppositely, first adjusting mechanism (5) is arranged between the first support rod (1-1) and the second support rod (1-2), for adjusting the interval between the first support rod (1-1) and the second support rod (1-2); First support plate (2), the first support plate (2) is movably arranged on the first support rod (1-1) and the second support rod (1-2), and the first support plate (2) corresponding to the first support rod (1-1) and the second support rod (1-2) is arranged oppositely; Second support plate (4), the second support plate (4) is movably arranged on the first support rod (1-1) and the second support rod (1-2), and the second support plate (4) corresponding to the first support rod (1-1) and the second support rod (1-2) is arranged oppositely; Third support plate (3), the third support plate (3) is movably arranged on the first support rod (1-1) and the second support rod (1-2), the third support plate (3) is located between the first support plate (2) and the second support plate (4), and the third support plate (3) corresponding to the first support rod (1-1) and the second support rod (1-2) is arranged oppositely; Wherein, the third support plate (3) and the first support plate (2) and / or the third support plate (3) and the second support plate (4) are provided with support (6), to limit the movement degree of freedom of the third support plate (3).

2. The valve positioner of claim 1, wherein The first support plate (2), the second support plate (4) and the third support plate (3) on the same side are formed with mounting holes for the first support rod (1-1) to pass through, and the first support plate (2), the second support plate (4) and the third support plate (3) on the other side are formed with mounting holes for the second support rod (1-2) to pass through, the first support rod (1-1) and the second support rod (1-2) are screw rods, and a plurality of support adjusting nuts (1-3) for limiting the movement degree of freedom of the first support plate (2), the second support plate (4) and the third support plate (3) are threadedly connected on the screw rods.

3. The valve positioner of claim 1, wherein The first adjusting mechanism (5) comprises first adjusting screw (5-1) and a plurality of adjusting locking nuts (5-2), the first adjusting screw (5-1) is arranged between the first support plate (2) arranged oppositely, and the first support plate (2) is movably sleeved on the first adjusting screw (5-1); And / or, The first adjusting screw (5-1) is arranged between the second support plate (4) arranged oppositely, and the second support plate (4) is movably sleeved on the first adjusting screw (5-1); And / or, The first adjusting screw (5-1) is arranged between the oppositely arranged third support plates (3), and the two third support plates (3) are movably sleeved on the first adjusting screw (5-1); The adjusting locking nuts (5-2) are threadedly connected on the first adjusting screw (5-1) to limit the movement freedom of the parts movably sleeved on the upper part of the first adjusting screw (5-1).

4. The valve positioner of claim 3, wherein The first support plate (2) and / or the second support plate (4) and / or the third support plate (3) are formed with mounting holes through which the first adjusting screw (5-1) passes.

5. The valve positioner of claim 1, wherein The support member (6) comprises a second adjusting screw (6-1) and a support locking nut (6-2), the second adjusting screw (6-1) is movably arranged on the third support plate (3), and the support locking nut (6-2) is threadedly connected on the second adjusting screw (6-1).

6. The valve positioner of claim 5, wherein Each third support plate (3) is provided with a through hole (3-2), the second adjusting screw (6-1) is movably arranged in the through hole (3-2), and the two ends of the second adjusting screw (6-1) can respectively extend from the two sides of the through hole (3-2) to be respectively used for abutting against the first support plate (2) and the second support plate (4).

7. The valve positioner of claim 1, wherein The opposite sides of the two third support plates (3) are respectively formed with protrusions (3-1).

8. The valve positioner of claim 1, wherein The opposite sides of the two third support plates (3) are movably provided with adjusting blocks (8), and the adjusting blocks (8) are adapted to move to the middle of the two third support plates (3).

9. The valve positioner of claim 8 wherein, The adjusting block (8) is provided with a push rod (9), the push rod (9) is movably sleeved with a locking member (10), the third support plate (3) is formed with a mounting hole through which the push rod (9) passes, one end of the push rod (9) extending from the mounting hole is connected with the adjusting block (8), and the other end is threadedly connected with a push rod locking member (10).

10. The valve positioner of claim 9, wherein The adjusting block (8) and the third support plate (3) are provided with an elastic member (11) sleeved on the push rod (9).

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