Connecting piece and valve positioner

Abstract

The utility model provides a connecting piece and a valve positioner, and belongs to the technical field of valve positioners. The connecting piece is configured to be connected with a feedback shaft assembly of the valve positioner and the actuator and comprises a first hinge seat, a connecting body and a second hinge seat, the first hinge seat is connected with the feedback shaft assembly of the valve positioner, the connecting body comprises a first connecting block and a second connecting block which are connected with each other, and the first connecting block is connected with the first hinge seat; the second hinge seat is connected with the actuator, the second hinge seat is provided with a connecting groove, the second connecting block is arranged in the connecting groove, and the second connecting block and the feedback shaft assembly are kept relatively static, so that the second hinge seat can move relative to the feedback shaft assembly in the axial direction of the feedback shaft assembly, and the second hinge seat and the feedback shaft assembly synchronously rotate. According to the connecting piece, the influence of vibration of the actuator in the axial direction of the feedback shaft assembly on the feedback shaft assembly can be reduced, and the accuracy of the valve opening fed back by the feedback shaft assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve positioner technology, and in particular to a connector and a valve positioner. Background Technology

[0002] Valve positioners are key components in valve control, forming a basic controllable unit in a production pipeline along with the valve and actuator. The valve positioner controls the valve opening and regulates the flow rate of the medium within the pipeline by controlling the actuator's stroke. With advancements in valve positioner technology, intelligent valve positioners have become market leaders due to their lower maintenance costs and superior interactive performance. During the operation of the actuator paired with the valve positioner, the feedback shaft assembly of the valve positioner is connected to the actuator via a connector to provide feedback on the actuator's actual position.

[0003] In related technologies, the second connecting block and the second hinge seat are rigidly connected, which allows the vibration of the actuator along the axial direction of the feedback shaft assembly to be transmitted to the feedback shaft assembly relatively completely, affecting the accuracy of the valve opening degree fed back by the feedback shaft assembly, resulting in low accuracy of the valve opening degree fed back by the feedback shaft assembly. Utility Model Content

[0004] This utility model provides a connector and a valve positioner, the purpose of which is to reduce the impact of the axial vibration of the actuator along the feedback shaft assembly on the feedback shaft assembly, so as to improve the accuracy of the valve opening degree fed back by the feedback shaft assembly.

[0005] To achieve the above objectives, this utility model provides a connector configured to connect a feedback shaft assembly of a valve positioner and an actuator, the connector comprising:

[0006] The first hinge seat is connected to the feedback shaft assembly of the valve positioner;

[0007] The connecting body includes a first connecting block and a second connecting block that are connected to each other, wherein the first connecting block is connected to the first hinge seat;

[0008] A second hinge seat is connected to the actuator. The second hinge seat has a connecting groove. A second connecting block is disposed in the connecting groove. The second connecting block remains relatively stationary with the feedback shaft assembly, so that the second hinge seat can move relative to the feedback shaft assembly along the axial direction of the feedback shaft assembly, and so that the second hinge seat rotates synchronously with the feedback shaft assembly.

[0009] In one embodiment, the two opposite sides of the connecting groove are clamping surfaces, and the distance between the two clamping surfaces gradually changes along the axial direction of the feedback shaft assembly.

[0010] In one embodiment, the second connecting block is configured as an elongated structure, with the axial direction of the elongated second connecting block parallel to the extension direction of the connecting groove.

[0011] In one embodiment, the first connecting block includes a first connecting rod and a second connecting rod arranged in a cross pattern, the first hinge seat has a mounting groove, the first connecting rod is disposed in the mounting groove, and the two ends of the second connecting rod along the axial direction are respectively connected to the first connecting rod and the second connecting block.

[0012] In one embodiment, the connector further includes a rivet that passes through the first hinge seat and the feedback shaft assembly, so that the first hinge seat and the feedback shaft assembly are riveted together.

[0013] In one embodiment, the connector includes bolts that pass through the first hinge seat and the feedback shaft assembly, and the number of bolts is at least two, with the at least two bolts arranged circumferentially spaced along the feedback shaft assembly.

[0014] In one embodiment, the connector includes a pointer disposed axially between the feedback shaft assembly and the first hinge seat, the pointer being radially positioned along the feedback shaft assembly such that the pointer is configured to indicate the position of the feedback shaft assembly.

[0015] In a second aspect, this utility model provides a valve positioner, comprising:

[0016] The positioner body is configured to drive the actuator associated with the valve positioner to open or close the valve.

[0017] A feedback shaft assembly, disposed within the positioner body, is configured to provide feedback on the valve opening degree;

[0018] According to any of the preceding embodiments, the feedback shaft assembly and the actuator are connected via the connector.

[0019] The above-mentioned solution of this utility model has the following beneficial effects:

[0020] In this embodiment, the second connecting block can remain relatively stationary relative to the second hinge seat along the circumferential direction of the feedback shaft assembly, allowing the feedback shaft assembly to rotate synchronously with the actuator. This enables the feedback shaft assembly to more accurately reflect the actual rotation angle of the actuator, thereby improving the accuracy of the feedback shaft assembly in reflecting the actual valve opening. Furthermore, the second connecting block can move relative to the second hinge seat along the axial direction of the feedback shaft assembly. This allows the vibration of the actuator along the axial direction of the feedback shaft assembly to be partially offset by the movement of the second connecting block relative to the second hinge seat during transmission to the feedback shaft assembly. This reduces the impact of the actuator's axial vibration on the feedback shaft assembly, further reducing its influence on the accuracy of the feedback shaft assembly's feedback of the valve opening, and ultimately improving the accuracy of the feedback shaft assembly's feedback of the valve opening.

[0021] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the valve positioner from one perspective in one embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the main structure of the connector in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the second hinge seat in one embodiment of the present invention from a certain perspective.

[0025] [Explanation of Labels in the Attached Image]

[0026] 1. Connector; 11. First hinge seat; 111. Mounting groove; 12. Connecting body; 121. First connecting block; 1211. First connecting rod; 1212. Second connecting rod; 122. Second connecting block; 13. Second hinge seat; 131. Connecting groove; 1311. Clamping surface; 14. Pointer; 2. Feedback shaft assembly; 3. Positioner body. Detailed Implementation

[0027] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] This application provides a valve positioner; please refer to [link / reference]. Figure 1 The valve positioner includes a positioner body 3, a feedback shaft assembly 2, and a connector 1. The positioner body 3 is configured to drive an actuator associated with the valve positioner to open and close the valve. The feedback shaft assembly 2 is disposed within the positioner body 3 and is configured to provide feedback on the valve opening degree. The feedback shaft assembly 2 and the actuator are connected via the connector 1.

[0031] The valve positioner described in this application can be a conventional valve positioner, an explosion-proof valve positioner, or an intelligent explosion-proof valve positioner. Explosion-proof valve positioners are typically installed on production pipelines carrying flammable and explosive gases. They control the valve stem opening by driving an actuator paired with the valve positioner, thereby regulating the flow rate of flammable and explosive gases in the production pipeline. Intelligent explosion-proof valve positioners may generate flames or sparks internally. Therefore, the intelligent explosion-proof valve positioner itself needs to have a good ability to prevent the internal flame from spreading to the external flammable and explosive gases, thereby reducing the possibility of the internal flame igniting the flammable and explosive gases and improving the safety of production pipelines carrying flammable and explosive gases.

[0032] For example, during the process of the positioner body 3 of the valve positioner driving the actuator to move, the feedback shaft assembly 2 connected to the actuator can also move synchronously, so that the movement amplitude of the feedback shaft assembly 2 can feed back the actual movement amplitude of the actuator, and then feed back the actual opening degree of the valve.

[0033] Specifically, please refer to Figure 2 , Figure 2 shows the main structure of the connector 1 in an embodiment of the present application. The connector 1 of the present application is configured to connect the feedback shaft assembly 2 of the valve positioner and the actuator that is supporting the valve positioner, so that the valve positioner can drive the actuator to act, enabling the actuator to drive the valve stem of the valve to act, and then enabling the valve positioner to adjust the opening degree of the valve. The connector 1 includes a first hinge seat 11, a connection body 12, and a second hinge seat 13. The materials of the first hinge seat 11, the connection body 12, and the second hinge seat 13 can all be materials with a certain strength and stiffness, such as metal. The first hinge seat 11 is connected to the feedback shaft assembly 2 of the valve positioner. For example, the first hinge seat 11 can remain relatively stationary with respect to the main shaft of the feedback shaft assembly 2. The connection body 12 includes a first connection block 121 and a second connection block 122 that are connected to each other. The first connection block 121 is connected to the first hinge seat 11, so that the first connection block 121 and the first hinge seat can remain relatively stationary. The second hinge seat 13 is connected to the actuator supporting the valve positioner, so that the second hinge seat 13 and the actuator remain relatively stationary. The second hinge seat 13 has a connection groove 131. The connection groove 131 can be located on the side of the second hinge seat 13 facing away from the actuator. The second connection block 122 is disposed in the connection groove 131. The second connection block 122 and the first connection block 121 remain relatively stationary, so that the second connection block 122 and the feedback shaft assembly 2 remain relatively stationary, enabling the second hinge seat 13 to move axially relative to the feedback shaft assembly 2 along the axis of the feedback shaft assembly 2, and enabling the second hinge seat 13 and the feedback shaft assembly 2 to rotate synchronously. Exemplarily, the second connection block 122 can be embedded in the connection groove 131, such that the second connection block 122 located in the connection groove 131 is not fixed axially along the feedback shaft assembly 2. The second connection block 122 can move axially relative to the second hinge seat 13 along the feedback shaft assembly 2. Circumferentially along the feedback shaft assembly 2, the second connection block 122 can rotate synchronously with the second hinge seat 13.

[0034] Exemplarily, during the operation of the actuator, the rotation of the actuator can drive the second connection block 122 to rotate through the second hinge seat 13, causing the connection body 12 to rotate, and then driving the first hinge seat 11 to rotate, so that the feedback shaft assembly 2 and the actuator rotate synchronously.

[0035] In this embodiment, the second connecting block 122 can remain relatively stationary relative to the second hinge seat 13 along the circumferential direction of the feedback shaft assembly 2, allowing the feedback shaft assembly 2 to rotate synchronously with the actuator. This enables the feedback shaft assembly 2 to more accurately reflect the actual rotation angle of the actuator, thereby improving the accuracy of the feedback shaft assembly 2 in reflecting the actual valve opening. Furthermore, the second connecting block 122 can move relative to the second hinge seat 13 along the axial direction of the feedback shaft assembly 2. This allows the vibration of the actuator along the axial direction of the feedback shaft assembly 2 to be partially offset by the movement of the second connecting block 122 relative to the second hinge seat 13 during transmission to the feedback shaft assembly 2. This reduces the impact of the actuator's vibration along the axial direction of the feedback shaft assembly 2 on the feedback shaft assembly 2, further reducing the impact of the actuator's vibration along the axial direction of the feedback shaft assembly 2 on the accuracy of the feedback shaft assembly 2 in reflecting the actual valve opening, and ultimately improving the accuracy of the feedback shaft assembly 2 in reflecting the actual valve opening.

[0036] In one embodiment, please refer to Figure 2 and Figure 3 The two opposite sides of the connecting groove 131 are clamping surfaces 1311, and both opposite clamping surfaces 1311 can fit against the second connecting block 122. The distance between the two clamping surfaces 1311 gradually changes along the axial direction of the feedback shaft assembly 2, for example, as shown in the figure. Figure 3 As shown, the distance between the two clamping surfaces 1311 gradually increases from top to bottom along the axial direction of the feedback shaft assembly 2, so that during the process of embedding the second connecting block 122 into the connecting groove 131, the second connecting block 122 can be embedded into the connecting groove 131 by relying on the elasticity of the groove wall of the connecting groove 131, so that the second connecting block 122 can be clamped relatively tightly in the connecting groove 131, and the second connecting block 122 can have a certain amount of movement space relative to the connecting groove 131 along the axial direction of the feedback shaft assembly 2, so as to reduce the impact of the actuator's vibration along the axial direction of the feedback shaft assembly 2 on the feedback shaft assembly 2.

[0037] For example, Figure 3 In this context, S1 and S2 represent the distances between the two opposing clamping surfaces 1311 of the connecting groove 131 at different positions. It can be understood that S1 can be less than S2, S1 can be equal to S2, and S1 can also be greater than S2.

[0038] In one embodiment, please refer to Figure 2 The second connecting block 122 is configured as a long strip structure, for example, it can be as follows: Figure 2The elongated rod shown has an axial direction of the elongated second connecting block 122 parallel to the extension direction of the connecting groove 131. This allows the connecting groove 131 of the second hinge seat 13 to provide a large rotational torque to the elongated second connecting block 122 when the second connecting block 122 is located in the connecting groove 131 and the actuator drives the feedback shaft assembly 2 to rotate. This enables the actuator to drive the feedback shaft assembly 2 to rotate synchronously more easily, which is beneficial to improving the accuracy of the actual opening degree of the feedback valve of the feedback shaft assembly 2.

[0039] It is understood that the shape of the second connecting block 122 is not limited. For example, the second connecting block 122 can also be configured as a dovetail structure.

[0040] In one embodiment, please refer to Figure 2 The first connecting block 121 includes a first connecting rod 1211 and a second connecting rod 1212 arranged in a cross configuration. The first hinge seat 11 has a mounting groove 111, in which the first connecting rod 1211 is disposed. The two ends of the second connecting rod 1212 along the axial direction are respectively connected to the first connecting rod 1211 and the second connecting block 122. For example, the first connecting rod 1211 can be as follows: Figure 2 As shown, the first connecting rod 1211 is arranged perpendicular to the second connecting rod 1212, and the second connecting rod 1212 is arranged perpendicular to the second connecting block 122. The first connecting rod 1211 is arranged parallel to the second connecting block 122, so that the connecting body 12 is configured as an I-shaped structure.

[0041] In this embodiment, the first connecting rod 1211 of the rod is disposed in the mounting groove 111 so that the first connecting rod 1211 can provide a large rotational torque to the mounting groove 111 of the first hinge seat 11, so that the actuator can drive the feedback shaft assembly 2 to rotate synchronously more easily, which is beneficial to improving the accuracy of the actual opening degree of the feedback valve of the feedback shaft assembly 2.

[0042] In one embodiment, the connector 1 further includes rivets, which pass through the first hinge seat 11 and the feedback shaft assembly 2. For example, the center position of the connection between the first hinge seat 11 and the feedback shaft assembly 2 has corresponding rivet holes. The rivets pass through the corresponding rivet holes of the first hinge seat 11 and the feedback shaft assembly 2 so that the first hinge seat 11 and the feedback shaft assembly 2 are riveted together. This reduces the impact of the connection process on the material properties of the first hinge seat 11 and the feedback shaft assembly 2, and also helps to improve the force transmission reliability and connection accuracy of the connection between the first hinge seat 11 and the feedback shaft assembly 2.

[0043] It is understood that the connection method between the first hinge seat 11 and the feedback shaft assembly 2 is not limited. For example, the first hinge seat 11 and the feedback shaft assembly 2 can also be welded together.

[0044] In one embodiment, the connector 1 includes bolts that pass through the first hinge seat 11 and the feedback shaft assembly 2. The number of bolts is at least two, and the at least two bolts are arranged at circumferential intervals along the feedback shaft assembly 2 to improve the reliability of the connection between the first hinge seat 11 and the feedback shaft assembly 2.

[0045] For example, the first hinge seat 11 and the feedback shaft assembly 2 are each provided with corresponding bolt holes at their connection points. There are two bolt holes, which are arranged symmetrically with respect to the rivet hole at the center. The bolts pass through the corresponding two bolt holes of the first hinge seat 11 and the feedback shaft assembly 2 to improve the reliability of the connection between the first hinge seat 11 and the feedback shaft assembly 2.

[0046] In one embodiment, please refer to Figure 2 The connector 1 includes a pointer 14, which can be configured as a component with an indicating arrow. The pointer 14 is arranged axially between the feedback shaft assembly 2 and the first hinge seat 11. The pointer 14 is arranged radially along the feedback shaft assembly 2 so that the pointer 14 is configured to indicate the position of the feedback shaft assembly 2. This allows the valve positioner commissioning personnel to observe the actual rotation angle of the feedback shaft assembly 2 more intuitively, which is beneficial to improving the convenience of commissioning personnel in commissioning the valve positioner.

[0047] It is understood that connector 1 is not limited to including pointer 14.

[0048] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A connection, characterized in that The connector is configured to connect the feedback shaft assembly of the valve positioner and the actuator, and the connector includes: The first hinge seat is connected to the feedback shaft assembly of the valve positioner; The connecting body includes a first connecting block and a second connecting block that are connected to each other, wherein the first connecting block is connected to the first hinge seat; A second hinge seat is connected to the actuator. The second hinge seat has a connecting groove. A second connecting block is disposed in the connecting groove. The second connecting block remains relatively stationary with the feedback shaft assembly, so that the second hinge seat can move relative to the feedback shaft assembly along the axial direction of the feedback shaft assembly, and so that the second hinge seat rotates synchronously with the feedback shaft assembly.

2. The connection of claim 1, wherein The two opposite sides of the connecting groove are clamping surfaces, and the distance between the two clamping surfaces gradually changes along the axial direction of the feedback shaft assembly.

3. The connection of claim 1, wherein The second connecting block is configured as an elongated structure, and the axial direction of the elongated second connecting block is parallel to the extension direction of the connecting groove.

4. The connector according to any one of claims 1 to 3, characterized in that, The first connecting block includes a first connecting rod and a second connecting rod arranged in a cross pattern. The first hinge seat has a mounting groove. The first connecting rod is disposed in the mounting groove. The two ends of the second connecting rod along the axial direction are respectively connected to the first connecting rod and the second connecting block.

5. The connector according to any one of claims 1 to 3, characterized in that, The connector further includes a rivet, which passes through the first hinge seat and the feedback shaft assembly to rivet the first hinge seat and the feedback shaft assembly.

6. The connector according to any one of claims 1 to 3, characterized in that, The connector includes bolts that pass through the first hinge seat and the feedback shaft assembly. The number of bolts is at least two, and the at least two bolts are arranged at circumferential intervals along the feedback shaft assembly.

7. The connector according to any one of claims 1 to 3, characterized in that, The connector includes a pointer disposed axially between the feedback shaft assembly and the first hinge seat, the pointer being radially positioned along the feedback shaft assembly to indicate the position of the feedback shaft assembly.

8. A valve positioner characterized by, include: The positioner body is configured to drive the actuator associated with the valve positioner to open or close the valve. A feedback shaft assembly, disposed within the positioner body, is configured to provide feedback on the valve opening degree; The feedback shaft assembly and the actuator are connected via the connector according to any one of claims 1 to 7.

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