Adjustable pneumatic actuator

Abstract

The utility model discloses an adjustable pneumatic actuator which comprises an air cylinder body and end covers arranged at the two ends of the air cylinder body, an air inlet hole is formed in the front end of the air cylinder body, a gear shaft is rotationally arranged in the middle of an inner cavity of the air cylinder body, and pistons are arranged at the left end and the right end of the inner cavity of the air cylinder body. Piston arms located on the two sides of the gear shaft are arranged at the inner ends of the pistons at the two ends, transmission teeth meshed with the gear shaft are arranged on the two piston arms, reset assemblies are arranged between the pistons and the inner ends of the end covers, and adjusting screws used for adjusting the stroke of the pistons are connected to the end covers in a threaded mode. Compared with the prior art, the valve has the advantages that the opening degree of the valve can be flexibly controlled, and an operator can conveniently observe the state of the valve.

Description

Technical Field

[0001] The utility model relates to the technical field of valve control, in particular to an adjustable pneumatic actuator. Background Art

[0002] In the field of industrial automation, pneumatic actuators are the core components of valve control and are widely used in various industrial processes. Traditional pneumatic actuators have the problem of fixed switching amplitude, which cannot be adjusted and is inconvenient for operators to observe the switching amplitude in valve control.

[0003] In many industrial scenarios, valve control often requires flexibility and precision, but the pneumatic actuators in the existing technology fail to provide sufficient adjustability and intuitive status observation methods. This results in the inability to meet the flexibility requirements of valve control under certain specific operating requirements, and it is difficult for operators to accurately understand the specific range of valve opening and closing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above technical defects and provide an adjustable pneumatic actuator.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: an adjustable pneumatic actuator, comprising a cylinder body and end covers arranged at both ends of the cylinder body, an air inlet hole is arranged at the front end of the cylinder body, a gear shaft is rotatably arranged in the middle of the inner cavity of the cylinder body, pistons are arranged at the left and right ends of the inner end of the cylinder body cavity, piston arms are arranged at the inner ends of the pistons at both ends respectively located on both sides of the gear shaft and transmission teeth meshing with the gear shaft are arranged on the two piston arms, a reset assembly is arranged between the piston and the inner end of the end cover, and an adjusting screw for adjusting the piston stroke is threadedly connected to the end cover.

[0006] Preferably, the reset assembly includes a plurality of sleeves circumferentially distributed on the inner side of the end cover, the outer end of the piston is provided with a pressure rod corresponding to the position of the sleeve, the end of the pressure rod away from the piston is slidably arranged in the sleeve, the sleeve is provided with a first connecting convex ring, the pressure rod is provided with a second connecting convex ring, and a reset spring is connected between the first connecting convex ring and the second connecting convex ring.

[0007] Preferably, an anti-slip knob is provided at the outer end of the adjusting screw, and a buffer block corresponding to the position of the inner end of the adjusting screw is provided at the middle of the outer end of the piston.

[0008] Preferably, the end cover is detachably connected to the cylinder body by bolts.

[0009] Preferably, a U-shaped frame is provided at the upper end of the cylinder body, a mounting seat is provided on the U-shaped frame, the upper end of the gear shaft is rotatably connected to the middle part of the mounting seat, a hemisphere is provided on the gear shaft, four indication areas of the same size are provided on the hemisphere, two diagonal indication areas are used to indicate the open state and the other two diagonal indication areas are used to indicate the closed state, a cover is provided on the mounting seat for covering the top of the hemisphere and two openings corresponding to the indication areas are provided diagonally on the cover.

[0010] Preferably, the two indicator areas for indicating the on state are green in color, and the two indicator areas for indicating the off state are red in color.

[0011] Preferably, the upper surface of the mounting seat is provided with a scale located in the opening.

[0012] The advantages of the utility model compared with the prior art are: first, its reset assembly adopts a sliding matching structure of a sleeve and a pressure rod, and by stabilizing the compression direction of the reset spring, the piston can be stably moved in the cylinder, thereby improving the performance and reliability of the actuator. Secondly, in terms of adjustment, by setting an anti-slip knob and a buffer block, the movement of the adjusting screw can limit the movement stroke of the piston, thereby controlling the opening degree of the valve, and the design of the buffer block effectively prevents direct contact between the piston and the adjusting screw, reducing possible damage. In addition, the end cover is detachably connected to the cylinder body by bolts, which facilitates the inspection of internal components and improves the convenience of maintenance. Finally, in order to facilitate the operator to observe the status of the valve, a U-shaped frame and an indication area design are introduced, which intuitively displays the switch status and opening degree of the valve through changes in color and area, thereby improving the visibility and accuracy of the operation. Overall, the pneumatic actuator has a reasonable structural design and complete functions, and has obvious advantages in performance and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an adjustable pneumatic actuator of the present application.

[0014] Figure 2 It is a schematic diagram of the internal structure of an adjustable pneumatic actuator of the present application.

[0015] Figure 3 It is a schematic diagram of the disassembled structure of a cover and a mounting seat in an adjustable pneumatic actuator of the present application.

[0016] As shown in the figure: 1. Cylinder body, 2. Air inlet, 3. Gear shaft, 4. Piston, 5. Piston arm, 6. Transmission gear, 7. Adjusting screw, 9. Pressure rod, 13. Anti-slip knob, 14. Buffer block, 15. U-shaped frame, 16. Mounting seat, 17. Hemisphere, 18. Indication area, 19. Cover, 20. Opening, 21. Scale, 22. End cover. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0019] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0021] Combined with Figure 1 -Attached Figure 3 , an adjustable pneumatic actuator, comprising a cylinder body 1 and end covers 22 arranged at both ends of the cylinder body 1, an air inlet 2 is arranged at the front end of the cylinder body 1, a gear shaft 3 is rotatably arranged in the middle of the inner cavity of the cylinder body 1, pistons 4 are arranged at the left and right ends of the inner cavity of the cylinder body 1, the inner ends of the pistons 4 at both ends are provided with piston arms 5 respectively located on both sides of the gear shaft 3, and the two piston arms 5 are provided with transmission teeth 6 meshing with the gear shaft 3, a reset component is arranged between the piston 4 and the inner end of the end cover 22, and an adjusting screw 7 for adjusting the stroke of the piston 4 is threadedly connected to the end cover 22.

[0022] In one embodiment, the reset assembly includes a plurality of sleeves circumferentially distributed on the inner side of the end cover 22, and a pressure rod 9 corresponding to the position of the sleeve is provided at the outer end of the piston 4, and the end of the pressure rod 9 away from the piston 4 is slidably arranged in the sleeve, and a first connecting convex ring is provided on the sleeve, and a second connecting convex ring is provided on the pressure rod 9, and a reset spring is connected between the first connecting convex ring and the second connecting convex ring. The sliding cooperation between the pressure rod 9 and the sleeve can stabilize the compression direction of the reset spring, so as to facilitate the stable movement of the piston 4 in the inner cavity of the cylinder body 1.

[0023] In one embodiment, an anti-slip knob 13 is provided at the outer end of the adjusting screw 7, and a buffer block 14 corresponding to the inner end position of the adjusting screw 7 is provided at the middle of the outer end of the piston 4. The adjusting screw 7 is driven to move by rotating the anti-slip knob 13, and the inner end of the adjusting screw 7 moves a certain distance to limit the moving stroke of the piston 4, so as to control the opening degree of the valve. The setting of the buffer block 14 can prevent the end of the adjusting screw 7 from directly contacting the end face of the piston 4 and causing damage to the piston 4.

[0024] In one embodiment, the end cover 22 is detachably connected to the cylinder block 1 via bolts. The detachable connection of the end cover 22 facilitates the inspection and maintenance of the internal components of the cylinder block 1.

[0025] In one embodiment, in order to facilitate the staff to observe the opening state of the valve, a U-shaped frame 15 is provided at the upper end of the cylinder body 1, and a mounting seat 16 is provided on the U-shaped frame 15. The upper end of the gear shaft 3 is rotatably connected to the middle part of the mounting seat 16. A hemisphere 17 is provided on the gear shaft 3, and four indicating areas 18 of the same size are provided on the hemisphere 17, wherein two diagonal indicating areas 18 are used to indicate the opening state and the other two diagonal indicating areas 18 are used to indicate the closing state. A cover 19 for covering the hemisphere 17 is provided on the mounting seat 16, and two openings 20 corresponding to the indicating areas 18 are provided diagonally on the cover 19. The gear shaft 3 can drive the valve to open accordingly during the rotation process, and the gear shaft 3 can drive the upper hemisphere 17 to rotate during the rotation process. During the rotation process, the indicator area 18 of the hemisphere 17 can leak out of the opening 20 of the cover 19, so that the staff can quickly know the switch state of the valve, and the dividing line between two adjacent indicator areas 18 can be used to align with the scale on the upper surface of the mounting seat 16, so that the opening degree of the valve can be accurately known.

[0026] In one embodiment, in order to facilitate the distinction of the indicator areas 18 , the two indicator areas 18 for indicating the open state are green in color, and the two indicator areas 18 for indicating the closed state are red in color.

[0027] Working principle: In the present application, the lower end of the gear shaft 3 is used to connect the valve. When the valve needs to be opened, high-pressure gas is first input into the cylinder body 1 through the air inlet 2. The two pistons 4 in the cylinder body 1 move toward the outer ends respectively under the action of the air pressure, and the two pistons 4 drive the rotation of the gear shaft 3 through the transmission teeth 6 on the piston arm 5 during the movement. The gear shaft 3 can drive the corresponding opening of the valve during the rotation, and the gear shaft 3 can drive the upper hemisphere 17 to rotate during the rotation. During the rotation of the hemisphere 17, its indication area 18 can leak out at the opening 20 of the cover 19. This makes it easy for the staff to quickly know the switch state of the valve, and the dividing line between two adjacent indicating areas 18 can be used to align with the scale on the upper surface of the mounting seat 16, so that the opening degree of the valve can be accurately known. The return spring can be compressed during the movement of the piston 4. When the air source is lost in the air inlet 2, the piston 4 returns to its original position under the elastic force of the return spring, thereby achieving the closure of the valve. When it is necessary to adjust the stroke of the piston 4, the adjusting screw 7 can be screwed, and the inner end of the adjusting screw 7 extends a certain distance to limit the movement of the piston 4, so as to control the opening degree of the valve.

[0028] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An adjustable pneumatic actuator, comprising a cylinder body (1) and end covers (22) arranged at both ends of the cylinder body (1), characterized in that: The front end of the cylinder body (1) is provided with an air inlet hole (2), the middle part of the inner cavity of the cylinder body (1) is rotatably provided with a gear shaft (3), the left and right ends of the inner cavity of the cylinder body (1) are provided with pistons (4), the inner ends of the pistons (4) at both ends are provided with piston arms (5) respectively located on both sides of the gear shaft (3), and the two piston arms (5) are provided with transmission teeth (6) meshing with the gear shaft (3), a reset component is provided between the piston (4) and the inner end of the end cover (22), and an adjusting screw (7) for adjusting the stroke of the piston (4) is threadedly connected to the end cover (22).

2. The adjustable pneumatic actuator according to claim 1, characterized in that: The reset assembly comprises a plurality of sleeves circumferentially distributed on the inner side of the end cover (22); a pressure rod (9) corresponding to the position of the sleeve is provided at the outer end of the piston (4); an end of the pressure rod (9) away from the piston (4) is slidably arranged in the sleeve; a first connecting convex ring is provided on the sleeve; a second connecting convex ring is provided on the pressure rod (9); and a reset spring is connected between the first connecting convex ring and the second connecting convex ring.

3. The adjustable pneumatic actuator according to claim 1, characterized in that: The outer end of the adjusting screw (7) is provided with an anti-slip knob (13), and the middle part of the outer end of the piston (4) is provided with a buffer block (14) corresponding to the position of the inner end of the adjusting screw (7).

4. The adjustable pneumatic actuator according to claim 1, characterized in that: The end cover (22) is detachably connected to the cylinder body (1) via bolts.

5. The adjustable pneumatic actuator according to claim 1, characterized in that: A U-shaped frame (15) is provided at the upper end of the cylinder body (1), a mounting seat (16) is provided on the U-shaped frame (15), the upper end of the gear shaft (3) is rotatably connected to the middle of the mounting seat (16), a hemisphere (17) is provided on the gear shaft (3), four indicating areas (18) of the same size are provided on the hemisphere (17), two indicating areas (18) at opposite corners are used to indicate an open state and the other two indicating areas (18) at opposite corners are used to indicate a closed state, a cover (19) is provided on the mounting seat (16) for covering the hemisphere (17), and two openings (20) corresponding to the indicating areas (18) are provided at opposite corners on the cover (19).

6. The adjustable pneumatic actuator according to claim 5, characterized in that: The two indicating areas (18) for indicating the open state are green in color, and the two indicating areas (18) for indicating the closed state are red in color.

7. The adjustable pneumatic actuator according to claim 6, characterized in that: The upper surface of the mounting seat (16) is provided with a scale (21) located in the opening (20).

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