Pneumatic valve execution device

Abstract

The utility model provides a pneumatic valve executing device, and relates to the technical field of valves. The device comprises an executing mechanism, a positioner is arranged above the executing mechanism, a feedback switch is arranged on the side portion of the positioner, the feedback switch is an integrated feedback switch, a converter is arranged among the positioner, the feedback switch and the executing mechanism, and the positioner, the feedback switch and the executing mechanism are all in transmission connection with the converter. The integrated feedback switch is used, the monitoring precision is improved, and the failure rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a pneumatic valve actuator. Background Technology

[0002] The main function of a pneumatic valve feedback switch is to monitor the actual position or status of the valve and feed the signal back to the control system to achieve closed-loop control and safety monitoring in the automated process. It can detect the opening and closing status of the valve in real time, ensure that the operator can grasp the actual status of the valve, and avoid the valve from failing to execute the command due to signal delay or failure, which could cause process interruption or safety accidents.

[0003] In the existing technology, pneumatic valves are divided into rotary and linear actuators. For rotary pneumatic valves, when switching feedback is required, due to structural limitations, only two-point feedback switches can be installed. However, two-point feedback switches have poor accuracy and a high failure rate. Although integrated feedback switches have higher accuracy and a lower failure rate than two-point feedback switches, they cannot currently be installed on rotary pneumatic valves. Utility Model Content

[0004] The purpose of this invention is to develop a pneumatic valve actuator that uses an integrated feedback switch to improve monitoring accuracy and reduce failure rate.

[0005] This utility model is achieved through the following technical solution:

[0006] A pneumatic valve actuator, comprising:

[0007] Executive agency;

[0008] The positioner is located above the actuator;

[0009] A feedback switch is located on the side of the positioner;

[0010] The feedback switch is an integrated feedback switch, and a converter is provided between the positioner, the feedback switch and the actuator. The positioner, the feedback switch and the actuator are all connected to the converter in a driving manner.

[0011] Optionally, the converter includes a housing, and connecting components are provided between the bottom of the housing and the actuator, between the top of the housing and the positioner, and between the top of the housing and the feedback switch.

[0012] Optionally, the connecting assembly includes a first connecting plate disposed on the housing, and the connecting assembly further includes a second connecting plate disposed on the actuator, the positioner and the feedback switch, wherein the first connecting plate and the second connecting plate are bolted together.

[0013] Optionally, there are two first connecting plates and two second connecting plates. The two first connecting plates are arranged in parallel, and the two first connecting plates and the second connecting plates are respectively located on the sides of the two first connecting plates. The two first connecting plates are provided with screw holes, and the two second connecting plates are provided with strip holes that mate with the screw holes at corresponding positions. The strip holes of the two second connecting plates are respectively bolted to the screw holes of the two first connecting plates.

[0014] Optionally, a first transmission wheel and a second transmission wheel are rotatably provided inside the housing. The first transmission wheel and the second transmission wheel have the same outer diameter. A synchronous belt is fitted on the first transmission wheel and the second transmission wheel. The first transmission wheel is connected to the positioner and the actuator, and the second transmission wheel is connected to the feedback switch.

[0015] Optionally, the rotation shafts of both the first and second transmission wheels are arranged vertically, with the first transmission wheel located inside the housing between the actuator and the positioner, and the second transmission wheel located inside the housing below the feedback switch.

[0016] Optionally, a first transmission rod coaxially connected to the top of the housing is rotatably connected to the first transmission wheel, and a drive rod is rotatably connected to the bottom of the positioner. The drive rod and the first transmission rod are connected by a coupling.

[0017] Optionally, a second transmission rod coaxially connected to the top of the housing is rotatably connected to the first transmission wheel, and a rotating rod is rotatably connected to the bottom of the feedback switch. The rotating rod is inserted into the second transmission rod to achieve a transmission connection.

[0018] Optionally, the bottom end of the rotating rod is provided with a strip-shaped retaining strip, and the top end of the second transmission rod is provided with a strip-shaped retaining groove that cooperates with the retaining strip.

[0019] Optionally, a third transmission rod coaxially connected to the bottom of the housing is rotatably connected to the first transmission wheel, and a follower rod is rotatably connected to the top of the actuator. The follower rod and the third transmission rod are connected by a coupling.

[0020] The beneficial effects of this utility model are:

[0021] This invention has a simple structure and low cost. It can install an integrated feedback switch on a rotary pneumatic valve to improve the accuracy of the opening and closing monitoring of the rotary pneumatic valve. Compared with the traditional two-point feedback switch, the integrated feedback switch has a lower failure rate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the present utility model;

[0024] Figure 2 This is a schematic diagram showing the connection between the positioner, feedback switch, and converter.

[0025] Figure 3 This is a diagram of the internal structure of the shell.

[0026] Reference numerals: 1. Housing; 2. Positioner; 3. Integrated feedback switch; 4. Actuator; 5. Second connecting plate; 6. First connecting plate; 7. Follower rod; 8. Third transmission rod; 9. Coupling; 10. First transmission wheel; 11. Second transmission wheel; 12. Synchronous belt; 13. First transmission rod; 14. Drive rod; 15. Second transmission rod; 16. Rotating rod. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] like Figures 1-3As shown, this utility model discloses a pneumatic valve actuator, including an actuator 4, a positioner 2 is provided above the actuator 4, an integrated feedback switch 3 is provided on the side of the positioner 2, and a converter is provided between the positioner 2, the integrated feedback switch 3 and the actuator 4, the converter enables the positioner 2, the integrated feedback switch 3 and the actuator 4 to be connected by transmission.

[0031] The converter includes a housing 1, which is rectangular in shape and horizontally arranged. Connecting components are provided between the bottom of the housing 1 and the actuator 4, between the top of the housing 1 and the positioner 2, and between the top of the housing 1 and the integrated feedback switch 3. The connecting components allow for the connection between the housing 1 and the actuator 4, the positioner 2, and the integrated feedback switch 3 while maintaining a gap.

[0032] The connecting assembly includes two first connecting plates 6 and two second connecting plates 5. The two first connecting plates 6 are provided with screw holes, and the two second connecting plates 5 are provided with corresponding slotted holes that mate with the screw holes. The two first connecting plates 6 are parallel to each other and vertically arranged and connected to the housing 1. The two second connecting plates 5 are located outside the two first connecting plates 6 and are also parallel to the two first connecting plates 6. The two second connecting plates 5 are provided on the corresponding actuators 4, positioners 2 and integrated feedback switches 3. The slotted holes of the two second connecting plates 5 are bolted to the screw holes of the two first connecting plates 6 respectively.

[0033] A first transmission wheel 10 and a second transmission wheel 11 are rotatably mounted inside the housing 1. The rotation axes of both the first transmission wheel 10 and the second transmission wheel 11 are vertically arranged. The first transmission wheel 10 is located within the housing 1 between the actuator 4 and the positioner 2, while the second transmission wheel 11 is located within the housing 1 below the integrated feedback switch 3. A synchronous belt 12 is fitted onto both the first transmission wheel 10 and the second transmission wheel 11, causing them to rotate synchronously. The first transmission wheel 10 and the second transmission wheel 11 have the same outer diameter. When the first transmission wheel 10 and the second transmission wheel 11 rotate synchronously via the synchronous belt 12, their linear velocity and angular velocity are the same.

[0034] The top of the housing 1 is rotatably connected to a first transmission rod 13 coaxially connected to the first transmission wheel 10 and a second transmission rod 15 coaxially connected to the second transmission wheel 11. The bottom of the housing 1 is also rotatably connected to a third transmission rod 8 coaxially connected to the first transmission wheel 10.

[0035] The bottom of the positioner 2 has a rotating drive rod 14, which is connected to the first transmission rod 13 via a coupling 9.

[0036] The actuator 4 has a follower rod 7 rotating on its top, and the follower rod 7 is connected to the third transmission rod 8 via a coupling 9.

[0037] The integrated feedback switch 3 has a rotating rod 16 at the bottom. The rotating rod 16 is inserted into the second transmission rod 15 to achieve a transmission connection. The bottom end of the rotating rod 16 is provided with a strip-shaped locking strip. The top end of the second transmission rod 15 is provided with a strip-shaped locking groove that cooperates with the locking strip. The locking strip is inserted into the locking groove to achieve a transmission connection between the rotating rod 16 and the second transmission rod 15.

[0038] The positioner 2 rotates, causing the drive rod 14 to rotate. The drive rod 14 drives the first transmission rod 13 to rotate, which in turn drives the first transmission wheel 10 to rotate. The synchronous belt 12 causes the second transmission wheel 11 to rotate synchronously. Subsequently, the second transmission rod 15 on the second transmission wheel 11 drives the rotating rod 16 to rotate synchronously. The first transmission wheel 10 also drives the third transmission rod 8 to rotate, which in turn drives the follower rod 7 to rotate, thus operating the actuator 4. Through a converter, the rotation angle of the positioner 2 is fed back to the rotating rod 16 of the integrated feedback switch 3, enabling monitoring of the valve's opening and closing status.

[0039] This utility model has a simple structure and low cost. The integrated feedback switch 3 can be installed on the angular stroke pneumatic valve to improve the accuracy of the angular stroke pneumatic valve opening and closing monitoring. Compared with the traditional two-point feedback switch, the integrated feedback switch 3 has a low failure rate.

[0040] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A pneumatic valve actuator, characterized in that, include: Executive agency; The positioner is located above the actuator; A feedback switch is located on the side of the positioner; The feedback switch is an integrated feedback switch, and a converter is provided between the positioner, the feedback switch and the actuator. The positioner, the feedback switch and the actuator are all connected to the converter in a driving manner.

2. The pneumatic valve actuator according to claim 1, characterized in that, The converter includes a housing, and connecting components are provided between the bottom of the housing and the actuator, between the top of the housing and the positioner, and between the top of the housing and the feedback switch.

3. The pneumatic valve actuator according to claim 2, characterized in that, The connecting assembly includes a first connecting plate disposed on the housing, and the connecting assembly also includes a second connecting plate disposed on the actuator, the positioner and the feedback switch, wherein the first connecting plate and the second connecting plate are bolted together.

4. The pneumatic valve actuator according to claim 3, characterized in that, There are two first connecting plates and two second connecting plates. The two first connecting plates are arranged in parallel. The two first connecting plates and the second connecting plates are respectively located on the sides of the two first connecting plates. The two first connecting plates are provided with screw holes. The two second connecting plates are provided with strip holes that mate with the screw holes at corresponding positions. The strip holes of the two second connecting plates are respectively bolted to the screw holes of the two first connecting plates.

5. The pneumatic valve actuator according to claim 2, characterized in that, The housing contains a first transmission wheel and a second transmission wheel that rotate within it. The first transmission wheel and the second transmission wheel have the same outer diameter. A synchronous belt is fitted onto the first transmission wheel and the second transmission wheel. The first transmission wheel is connected to the positioner and the actuator, and the second transmission wheel is connected to the feedback switch.

6. The pneumatic valve actuator according to claim 5, characterized in that, The rotation shafts of the first and second transmission wheels are both arranged vertically. The first transmission wheel is located in the housing between the actuator and the positioner, and the second transmission wheel is located in the housing below the feedback switch.

7. The pneumatic valve actuator according to claim 6, characterized in that, The top of the housing is rotatably connected to a first transmission rod coaxially connected to the first transmission wheel, and the bottom of the positioner is rotatably connected to a drive rod, which is connected to the first transmission rod via a coupling.

8. The pneumatic valve actuator according to claim 6, characterized in that, The top of the housing is rotatably connected to a second transmission rod that is coaxially connected to the first transmission wheel, and the bottom of the feedback switch has a rotating rod that is rotatably connected to the second transmission rod to achieve a transmission connection.

9. The pneumatic valve actuator according to claim 8, characterized in that, The bottom end of the rotating rod is provided with a strip-shaped retaining strip, and the top end of the second transmission rod is provided with a strip-shaped retaining groove that cooperates with the retaining strip.

10. The pneumatic valve actuator according to claim 6, characterized in that, The bottom of the housing is rotatably connected to a third transmission rod that is coaxially connected to the first transmission wheel, and the top of the actuator is rotatably connected to a follower rod. The follower rod and the third transmission rod are connected by a coupling.

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