Pneumatic actuator for butterfly valve

Abstract

The pneumatic actuator for the butterfly valve comprises an actuator body and a supporting frame, the supporting frame comprises an installation disc, sliding rods, supporting rods, a supporting plate and a driving mechanism, the installation disc is arranged on the lower end face of the actuator body, the sliding rods are horizontally arranged on the periphery of the installation disc, and the supporting plate is arranged on the supporting plate. The sliding rod is horizontally connected to the mounting disc in a sliding mode, the supporting rod is vertically arranged at the end of the sliding rod, and the supporting plate is horizontally arranged at the lower end of the supporting rod. The utility model has the following advantages and effects: by arranging the support frame with adjustable size, the lower end of the support frame can be adapted to flange plates on butterfly valves with different sizes, so that the actuator has multiple purposes, and the adaptability and the practicability of the whole actuator are improved.

Description

Technical Field

[0001] The utility model relates to the field of actuators, in particular to a pneumatic actuator for a butterfly valve. Background Art

[0002] The actuator is a combination of an actuator and a control valve in an automatic control system. Its function in the automatic control system is to receive signals from a regulator or computer, and adjust the flow of the process medium based on its position and characteristics in the process pipeline, thereby keeping the controlled automatic instrument within the range required by the production process.

[0003] During the assembly process of a traditional butterfly valve pneumatic actuator, the support frame below the actuator is usually fixed to the flange at the upper end of the butterfly valve. However, since the size of the support frame is fixed, it can only be adapted to one type of butterfly valve, which has poor practicality and needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pneumatic actuator for a butterfly valve, which has the effect of improving practicality.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a pneumatic actuator for a butterfly valve, comprising an actuator body and a support frame, the support frame comprising a mounting plate, a sliding rod, a support rod, a support plate and a driving mechanism, the mounting plate is arranged on the lower end surface of the actuator body, the sliding rod is horizontally arranged around the mounting plate, and is horizontally slidably connected to the mounting plate, the support rod is vertically arranged at the end of the sliding rod, and the support plate is horizontally arranged at the lower end of the support rod.

[0006] In a preferred example, the utility model can be further configured as follows: the driving mechanism includes a driving ring, a guide rod and a shift block, the driving ring is rotatably connected to the mounting plate and is located above the sliding rod, the guide rod is vertically arranged on the lower end surface of the driving ring, the sliding rod is provided with an arc-shaped guide groove for the guide rod to slide, and the shift block is arranged on the driving ring and passes through the mounting plate.

[0007] In a preferred example, the utility model can be further configured as follows: a shock-absorbing pad is provided on the lower end surface of the support plate.

[0008] In a preferred example, the utility model can be further configured as follows: a recording card for recording the maintenance time is provided on the upper end surface of the actuator body.

[0009] In a preferred example, the utility model can be further configured as follows: the recording card includes an installation box, a rotating shaft and a roller, the installation box is arranged on the actuator body, the rotating shaft is horizontally arranged in the installation box, the four rollers are arranged side by side and rotatably on the rotating shaft, the outer wall of the roller is provided with a digital mark, and the installation box is provided with a through hole for the outer edge position of the roller to pass through.

[0010] In a preferred example, the utility model can be further configured as follows: a friction rod distributed between two adjacent digital logos is transversely arranged on the outer wall of the roller.

[0011] In a preferred example, the utility model can be further configured as follows: the installation box includes a box body, a top cover and a spring, the top cover is vertically slidably connected to the box body and is provided for the roller to pass through, and the spring is provided between the top cover and the bottom wall of the box body.

[0012] In summary, the utility model has the following beneficial effects:

[0013] 1. By setting a support frame with adjustable size, the lower end of the support frame can adapt to the flanges on butterfly valves of different sizes, thereby realizing the multi-purpose use of the actuator and improving the adaptability and practicality of the entire actuator;

[0014] 2. By setting a rotating display device, the maintenance date can be recorded after the maintenance is completed, so that the last maintenance time can be accurately known during the next maintenance, without the worry of forgetting or losing, thus achieving the effect of conveniently recording the maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the installation state of the embodiment;

[0016] Figure 2 is a schematic structural diagram of a support frame of an embodiment;

[0017] Figure 3 is a schematic diagram of the connection relationship of the support frame of the embodiment;

[0018] Figure 4 It is a schematic diagram of the structure of the recording card of the embodiment.

[0019] Figure numerals: 1. actuator body; 2. support frame; 21. mounting plate; 22. sliding rod; 23. support rod; 24. support plate; 25. shock-absorbing pad; 3. driving mechanism; 31. driving ring; 32. guide rod; 33. shift block; 34. guide groove; 4. recording card; 41. mounting box; 42. rotating shaft; 43. roller; 44. digital identification; 45. through hole; 46. friction rod; 47. box body; 48. top cover; 49. spring. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, a pneumatic actuator for a butterfly valve comprises an actuator body 1 and a support frame 2 , wherein the support frame 2 comprises a mounting plate 21 , a sliding rod 22 , a support rod 23 , a support plate 24 and a driving mechanism 3 .

[0022] like Figure 2 , Figure 3 As shown, the mounting plate 21 is arranged on the lower end surface of the actuator body 1, and the sliding rod 22 is horizontally arranged around the mounting plate 21 and horizontally slidably connected to the mounting plate 21. The support rod 23 is vertically arranged at the end of the sliding rod 22, and the support plate 24 is horizontally arranged at the lower end of the support rod 23. The lower end surface of the support plate 24 is provided with a shock-absorbing pad 25 to increase the shock-absorbing capacity of the connection position.

[0023] like Figure 2 , Figure 3 As shown, the driving mechanism 3 includes a driving ring 31, a guide rod 32 and a shifting block 33. The driving ring 31 is rotatably connected to the mounting plate 21 and is located above the sliding rod 22. The guide rod 32 is vertically arranged on the lower end surface of the driving ring 31, and the sliding rod 22 is provided with an arc-shaped guide groove 34 for the guide rod 32 to slide. The shifting block 33 is arranged on the driving ring 31 and penetrates the mounting plate 21.

[0024] When the actuator needs to be installed on the butterfly valve, the control block 33 moves horizontally, and the block 33 drives the drive ring 31 to move synchronously, and the drive ring 31 drives the guide rod 32 to move synchronously. At this time, under the cooperation of the guide rod 32 and the guide groove 34, all the sliding rods 22 will be controlled to slide horizontally synchronously, and the sliding rod 22 drives the support rod 23 and the support plate 24 to move synchronously. When the distance between the support plates 24 meets the installation size requirements of the flange on the butterfly valve, the actuator can be fixed on the butterfly valve.

[0025] Therefore, by providing a support frame 2 with adjustable size, the lower end of the support frame 2 can be adapted to the flanges on butterfly valves of different sizes, thereby realizing the multi-purpose use of the actuator and improving the adaptability and practicality of the entire actuator.

[0026] like Figure 2 , Figure 4 As shown, a recording card 4 for recording the maintenance time is provided on the upper end surface of the actuator body 1 , and the recording card 4 includes a mounting box 41 , a rotating shaft 42 and a roller 43 .

[0027] like Figure 2 , Figure 4As shown, the mounting box 41 is arranged on the actuator body 1, the rotating shaft 42 is horizontally arranged in the mounting box 41, and four rollers 43 are arranged side by side and rotatably arranged on the rotating shaft 42. The outer wall of the roller 43 is provided with a number mark 44, and the mounting box 41 is provided with a through hole 45 for the outer edge position of the roller 43 to pass through. The outer wall of the roller 43 is transversely provided with a friction rod 46 distributed between two adjacent number marks 44, so as to make the rotation process of the control roller 43 more convenient.

[0028] After each inspection of the actuator is completed, the control roller 43 rotates so that the digital labels 44 on the four rollers 43 display the month and date of the inspection, so that the last inspection time can be accurately known during the next inspection without worrying about forgetting or losing, thereby achieving the effect of conveniently recording the inspection time.

[0029] like Figure 2 , Figure 4 As shown, the mounting box 41 includes a box body 47 , a top cover 48 and a spring 49 . The top cover 48 is vertically slidably connected to the box body 47 and is provided for the roller 43 to pass through. Meanwhile, the spring 49 is provided between the top cover 48 and the bottom wall of the box body 47 .

[0030] When it is necessary to record the maintenance date, the top cover 48 is pressed downward to allow the roller 43 to pass through the through hole 45 on the top cover 48, and then the roller 43 is controlled to rotate. When the recording is completed, the top cover 48 is released. At this time, under the action of the spring 49, the top cover 48 moves upward and resets. At the same time, the roller 43 is located below the top cover 48 to prevent accidental touch and ensure the accuracy of the recording.

[0031] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A pneumatic actuator for a butterfly valve, characterized in that: The invention comprises an actuator body (1) and a support frame (2), wherein the support frame (2) comprises a mounting plate (21), a sliding rod (22), a support rod (23), a support plate (24) and a driving mechanism (3), wherein the mounting plate (21) is arranged on the lower end surface of the actuator body (1), the sliding rod (22) is horizontally arranged around the mounting plate (21) and is horizontally slidably connected to the mounting plate (21), the support rod (23) is vertically arranged at the end of the sliding rod (22), and the support plate (24) is horizontally arranged at the lower end of the support rod (23).

2. A pneumatic actuator for a butterfly valve according to claim 1, characterized in that: The driving mechanism (3) comprises a driving ring (31), a guide rod (32) and a shifting block (33); the driving ring (31) is rotatably connected to the mounting plate (21) and is located above the sliding rod (22); the guide rod (32) is vertically arranged on the lower end surface of the driving ring (31); the sliding rod (22) is provided with an arc-shaped guide groove (34) for the guide rod (32) to slide; the shifting block (33) is arranged on the driving ring (31) and passes through the mounting plate (21).

3. A pneumatic actuator for a butterfly valve according to claim 1, characterized in that: A shock-absorbing pad (25) is provided on the lower end surface of the support plate (24).

4. A pneumatic actuator for a butterfly valve according to claim 1, characterized in that: The upper end surface of the actuator body (1) is provided with a recording card (4) for recording the maintenance time.

5. A pneumatic actuator for a butterfly valve according to claim 4, characterized in that: The recording card (4) comprises a mounting box (41), a rotating shaft (42) and a roller (43); the mounting box (41) is arranged on the actuator body (1); the rotating shaft (42) is horizontally arranged in the mounting box (41); four rollers (43) are arranged side by side and rotatably on the rotating shaft (42); the outer wall of the roller (43) is provided with a digital mark (44); and the mounting box (41) is provided with a through hole (45) for the outer edge position of the roller (43) to pass through.

6. A pneumatic actuator for a butterfly valve according to claim 5, characterized in that: The outer wall of the roller (43) is laterally provided with a friction rod (46) distributed between two adjacent digital marks (44).

7. A pneumatic actuator for a butterfly valve according to claim 6, characterized in that: The installation box (41) comprises a box body (47), a top cover (48) and a spring (49); the top cover (48) is vertically slidably connected to the box body (47) and is provided for the roller (43) to pass through; the spring (49) is provided between the top cover (48) and the bottom wall of the box body (47).

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