Angle adjusting device for pneumatic actuator

Abstract

The utility model discloses an angle adjusting device for a pneumatic actuator, relates to the technical field of pneumatic actuators, and adopts the technical scheme that the angle adjusting device for the pneumatic actuator comprises an actuator shell; the utility model discloses an angle adjusting device for a pneumatic actuator, which comprises an actuator shell and a pneumatic driving component arranged inside the actuator shell, the pneumatic driving component comprises an arc-shaped pneumatic cavity shell, and the inner arc end of the arc-shaped pneumatic cavity shell is communicated with a circular pneumatic cavity shell. The angle of the valve element can be rapidly controlled to achieve opening and closing of the valve, the pneumatic driving assembly can synchronously drive the pointer assembly, and the opening and closing conditions of the valve can be visually observed outside the pneumatic actuator. When the spring is abnormal such as elastic fatigue or deformation and the like and is not replaced in time, manual quick intervention can be performed, and the pointer and the valve element are reset by increasing the air inflow or manually shifting the pointer.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuator technology, and more specifically, it relates to an angle adjustment device for a pneumatic actuator. Background Technology

[0002] A pneumatic actuator is an actuator that uses air pressure to open, close, or regulate a valve. It is also called a pneumatic actuator mechanism or pneumatic device, but it is commonly referred to as a pneumatic head. Pneumatic actuators are sometimes equipped with certain auxiliary devices.

[0003] Pneumatic actuators are classified into double-acting and single-acting pneumatic actuators according to their operating mode. Double-acting pneumatic actuators are driven by an air source for both switching actions. When air pressure enters the cavity between the two pistons in the cylinder from the air port, the two pistons separate and move towards opposite ends of the cylinder, causing the output shaft to rotate counterclockwise. Conversely, when air pressure enters the cavity at both ends of the cylinder from the other air port, the two pistons move towards the center of the cylinder, causing the output shaft to rotate clockwise. Single-acting pneumatic actuators are divided into two types: single-acting normally closed and single-acting normally open. The single-acting normally closed type opens the valve under air pressure and closes it with spring force when air supply is cut off. The single-acting normally open type closes the valve under air pressure and opens it with spring force when air supply is cut off.

[0004] Existing angle adjustment devices for pneumatic actuators, such as those for single-acting pneumatic actuators, rely on springs for reset. Over time, these springs may experience fatigue or deformation, affecting the actuator's reset accuracy and reliability, and even leading to spring failure. Operators often cannot quickly observe these issues from the outside and take immediate remedial measures. They must periodically open the pneumatic actuator housing to inspect and replace the springs to restore the actuator's reset accuracy. Furthermore, the actuator's air chamber is relatively large, resulting in a slow response time, making it unsuitable for scenarios requiring rapid valve opening and closing. Therefore, to address these technical problems, this application proposes an angle adjustment device for pneumatic actuators. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an angle adjustment device for pneumatic actuators, so as to solve the technical problem of poor overall functionality of the existing angle adjustment devices for pneumatic actuators.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an angle adjustment device for a pneumatic actuator, comprising:

[0007] Actuator housing;

[0008] A pneumatic drive assembly is disposed inside the actuator housing. The pneumatic drive assembly includes an arc-shaped pneumatic cavity shell. The arc end of the arc-shaped pneumatic cavity shell is connected to a circular pneumatic cavity shell. A first shaft passes through the center of the circular pneumatic cavity shell, and a circular gear is rotatably connected inside the first shaft.

[0009] The transmission assembly is controlled by a first shaft. The power output end of the transmission assembly is connected to a valve stem, and a valve core is installed at the bottom end of the valve stem.

[0010] An indicator needle assembly is located at the center of the actuator housing and is controlled by a first shaft. The indicator needle assembly includes a second shaft rotatably connected to the axis of the actuator housing, and an L-shaped pointer is hinged to the end of the second shaft via a hinge.

[0011] Preferably, an arc-shaped rack is slidably connected inside the arc-shaped pneumatic cavity shell, and a circular gear is meshed with the arc end of the arc-shaped rack. A piston and a spring are respectively connected to both ends of the arc-shaped rack. The piston is located at one end near the air inlet of the arc-shaped pneumatic cavity shell, and the spring is located at the other end inside the arc-shaped pneumatic cavity shell.

[0012] Preferably, the transmission assembly includes a first pulley, a belt body, and a second pulley. The first pulley and the second pulley are connected by the belt body. Both the first pulley and the second pulley are rotatably connected inside the actuator housing. The first pulley is fixed to the end of the first shaft. A first bevel gear is fixed to the outer wall of the second pulley. A second bevel gear is meshed with the outer wall of the first bevel gear. The second bevel gear is fixed to the top of the valve stem.

[0013] Preferably, the outer wall of the actuator housing is equipped with a scale ring and a socket that can mate with an L-shaped pointer, and the inner wall of the socket is equipped with a rubber sleeve.

[0014] Preferably, an air nozzle is installed on the outer wall of the actuator housing, and the air nozzle is connected to the air inlet of the arc-shaped pneumatic cavity shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The angle adjustment device for pneumatic actuators disclosed in this utility model is equipped with an arc-shaped pneumatic cavity shell with a narrow inner cavity space. The response speed is relatively slow, but it can quickly control the valve core angle to open and close the valve. In addition, the pneumatic drive component can also synchronously drive the indicator needle component, so the valve opening and closing status can be directly observed from outside the pneumatic actuator. When the spring has abnormalities such as elastic fatigue or deformation and cannot be replaced in time, manual intervention can be carried out quickly by increasing the air intake or manually moving the pointer to reset the pointer and valve core. This solves the problem of poor overall functionality of existing angle adjustment devices for pneumatic actuators. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0022] 1. Actuator housing; 2. Pneumatic drive assembly; 3. Transmission assembly; 4. Valve stem; 5. Valve core; 6. Indicator needle assembly; 7. Scale ring; 8. Insertion hole; 9. Rubber sleeve; 10. Air nozzle;

[0023] 201. Arc-shaped pneumatic cavity shell; 202. Circular pneumatic cavity shell; 203. Arc-shaped rack; 204. Circular gear; 205. Piston; 206. Spring; 207. First shaft;

[0024] 301. First pulley; 302. Belt body; 303. Second pulley; 304. First bevel gear; 305. Second bevel gear;

[0025] 601, L-shaped pointer; 602, hinge; 603, second shaft. Detailed Implementation

[0026] like Figure 1-4 As shown, this utility model provides an angle adjustment device for a pneumatic actuator, including: an actuator housing 1, an air nozzle 10 installed on the outer wall of the actuator housing 1, the air nozzle 10 being connected to the air inlet of the arc-shaped pneumatic cavity shell 201, the air nozzle 10 being connected to an existing air supply assembly on the market, and the air supply assembly being able to supply air to the arc-shaped pneumatic cavity shell 201 through the air nozzle 10.

[0027] Furthermore, the pneumatic drive assembly 2 is disposed inside the actuator housing 1. The pneumatic drive assembly 2 includes an arc-shaped pneumatic cavity shell 201, with a circular pneumatic cavity shell 202 connected to the arc end of the arc-shaped pneumatic cavity shell 201. A first shaft 207 passes through the axis of the circular pneumatic cavity shell 202, and a circular gear 204 is rotatably connected inside the circular pneumatic cavity shell 202 via the first shaft 207. An arc-shaped rack 203 is slidably connected inside the arc-shaped pneumatic cavity shell 201. A circular gear 204 is meshed with the arc end of the circular gear rack 203. A piston 205 and a spring 206 are connected to both ends of the arc-shaped pneumatic cavity shell 201, respectively. The piston 205 is located at one end near the air inlet of the arc-shaped pneumatic cavity shell 201, and the spring 206 is located at the other end inside the arc-shaped pneumatic cavity shell 201. When air is introduced into the arc-shaped pneumatic cavity shell 201, the gas will squeeze the piston 205 and the arc-shaped gear rack 203 to the other end, and the spring 206 will be compressed and shortened, allowing the circular gear 204 to rotate counterclockwise.

[0028] Furthermore, the transmission assembly 3 is controlled by the first shaft 207. The power output end of the transmission assembly 3 is connected to the valve stem 4, and the bottom end of the valve stem 4 is equipped with the valve core 5. The transmission assembly 3 includes a first pulley 301, a belt body 302, and a second pulley 303. The first pulley 301 and the second pulley 303 are connected by the belt body 302. Both the first pulley 301 and the second pulley 303 are rotatably connected inside the actuator housing 1. The first pulley 301 is fixed to the end of the first shaft 207. The outer wall of the second pulley 303 is fixed with a first bevel gear 304. The outer wall of the first bevel gear 304 is meshed with a second bevel gear 305. The second bevel gear 305 is fixed to the top of the valve stem 4. The pneumatic drive assembly 2 can drive the valve stem 4 and the valve core 5 to rotate synchronously through the transmission assembly 3. By adjusting the angle of the valve core 5 (such as a ball or valve plate), the valve can be opened or closed.

[0029] Furthermore, the indicator needle assembly 6 is located at the center of the outside of the actuator housing 1 and is controlled by transmission via the first shaft 207. The indicator needle assembly 6 includes a second shaft 603 rotatably connected to the axis of the actuator housing 1. An L-shaped pointer 601 is hinged to the end of the second shaft 603 via a hinge 602. A scale ring 7 and a socket 8 that can cooperate with the L-shaped pointer 601 are installed on the outer wall of the actuator housing 1. A rubber sleeve 9 is installed on the inner wall of the socket 8. The pneumatic drive assembly 2 can drive the indicator needle assembly 6 to rotate through the transmission assembly 3. The scale ring 7 indicates the rotation angle of the valve core 5, i.e. the opening and closing status of the valve. In case of failure, it can be quickly detected and manually intervened for emergency correction.

[0030] Working Principle: The angle adjustment device for pneumatic actuators disclosed in this utility model is equipped with an arc-shaped pneumatic cavity shell 201 with a narrow internal cavity space. Its response speed is relatively slow, but it can quickly control the angle of the valve core 5 to achieve valve opening and closing. Furthermore, the pneumatic drive assembly 2 can synchronously drive the indicator needle assembly 6, allowing for direct observation of the valve opening and closing status from outside the pneumatic actuator. If the spring 206 experiences elastic fatigue or deformation and cannot be replaced in time, manual intervention is possible by increasing the air intake or manually resetting the pointer and valve core 5. Air is supplied to the air nozzle 10 through the external air supply assembly. The air enters the arc-shaped pneumatic cavity shell 201, and the air pressure pushes the piston 205 to the other end. The arc-shaped rack 203 also moves synchronously in the arc-shaped pneumatic cavity shell. As the moving cavity shell 201 slides towards the other end, the spring 206 is compressed and shortened. When the arc-shaped rack 203 slides, it drives the circular gear 204, which is meshed with its inner arc end, to rotate counterclockwise. The first shaft 207 at the center of the circular gear 204 also rotates counterclockwise synchronously. The first shaft 207 passes through the circular pneumatic cavity shell 202 and is rotatably connected to the center of the circular pneumatic cavity shell 202 through a sealing sleeve. The first pulleys 301 and the indicator needle assembly 6 at both ends of the first shaft 207 rotate counterclockwise synchronously. When the first pulley 301 rotates, it drives the second pulley 303 to rotate synchronously through the belt body 302. The outer diameter of the second pulley 303 is twice that of the first pulley 301. When the first pulley 301 rotates... When the valve rotates half a turn, the second pulley 303 rotates a quarter turn. The second pulley 303 drives the valve stem 4 and valve core 5 to rotate a quarter turn, or ninety degrees, through the first bevel gear 304 and the second bevel gear 305, thus opening or closing the valve. The indicator needle assembly 6 rotates half a turn, or one hundred and eighty degrees. By observing the mark on the scale ring 7 pointed to by the indicator needle assembly 6, the rotation status of the valve core 5 can be quickly determined. When the air supply to the air nozzle 10 stops, the compressed spring 206 rebounds and resets, causing the arc rack 203, the circular gear 204, the indicator needle assembly 6, and the valve core 5 to reset. If the spring 206 experiences elastic fatigue or deformation due to long service time and cannot be replaced in time, manual intervention can be performed quickly by increasing the air intake. The indicator needle assembly 6 can be manually adjusted. If the indicator needle assembly 6 does not return to its initial position, it can be manually corrected until it points to the initial position. The L-shaped pointer 601 can be rotated 180 degrees so that its protruding end is inserted into the socket 8 on the actuator housing 1. The L-shaped pointer 601 is clamped by the soft rubber sleeve 9. When the valve core 5 angle needs to be adjusted again, the L-shaped pointer 601 can be rotated 180 degrees again so that its protruding end is away from the actuator housing 1. This does not obstruct the rotation of the L-shaped pointer 601. The valve can still operate normally even if the spring 206 fails due to manual intervention (the external air supply component is a commercially available product and is connected to an external power source and an external switch).

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An angle adjustment device for a pneumatic actuator, characterized in that, include: Actuator housing (1); A pneumatic drive assembly (2) is disposed inside the actuator housing (1). The pneumatic drive assembly (2) includes an arc-shaped pneumatic cavity shell (201). The inner arc end of the arc-shaped pneumatic cavity shell (201) is connected to a circular pneumatic cavity shell (202). A first shaft (207) passes through the center of the circular pneumatic cavity shell (202), and a circular gear (204) is rotatably connected inside the circular pneumatic cavity shell (202) through the first shaft (207). The transmission assembly (3) is controlled by the first shaft (207). The power output end of the transmission assembly (3) is connected to the valve stem (4), and the bottom end of the valve stem (4) is equipped with a valve core (5). The indicator needle assembly (6) is located at the center outside the actuator housing (1) and is controlled by transmission via a first shaft (207). The indicator needle assembly (6) includes a second shaft (603) rotatably connected to the axis of the actuator housing (1). An L-shaped pointer (601) is hinged to the end of the second shaft (603) via a hinge (602).

2. The angle adjustment device for a pneumatic actuator according to claim 1, characterized in that: An arc-shaped rack (203) is slidably connected inside the arc-shaped pneumatic cavity shell (201). A circular gear (204) is meshed with the arc end of the arc-shaped rack (203). A piston (205) and a spring (206) are respectively connected to both ends of the arc-shaped rack (203). The piston (205) is located at one end near the air inlet of the arc-shaped pneumatic cavity shell (201), and the spring (206) is located at the other end inside the arc-shaped pneumatic cavity shell (201).

3. The angle adjustment device for a pneumatic actuator according to claim 2, characterized in that: The transmission assembly (3) includes a first pulley (301), a belt body (302), and a second pulley (303). The first pulley (301) and the second pulley (303) are connected by the belt body (302). The first pulley (301) and the second pulley (303) are rotatably connected inside the actuator housing (1). The first pulley (301) is fixed to the end of the first shaft (207). A first bevel gear (304) is fixed to the outer wall of the second pulley (303). A second bevel gear (305) is meshed with the outer wall of the first bevel gear (304). The second bevel gear (305) is fixed to the top of the valve stem (4).

4. The angle adjustment device for a pneumatic actuator according to claim 3, characterized in that: The actuator housing (1) has a scale ring (7) and a socket (8) that can cooperate with an L-shaped pointer (601) installed on its outer side wall, and a rubber sleeve (9) is installed on the inner side wall of the socket (8).

5. The angle adjustment device for a pneumatic actuator according to claim 4, characterized in that: An air nozzle (10) is installed on the outer wall of the actuator housing (1), and the air nozzle (10) is connected to the air inlet of the arc-shaped pneumatic cavity shell (201).

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