Three-section type pneumatic actuator

Abstract

The utility model belongs to the field of pneumatic actuators, particularly relates to a three-section type pneumatic actuator, and aims to solve the problems that an internal piston gear shaft is separated, an air cylinder is directly damaged and a valve cannot work normally due to excessive force in the prior art, and when a bolt is adjusted, the bolt is directly rotated traditionally and cannot be finely adjusted to a proper position conveniently. The actuator comprises an actuator box body and two actuator cylinder bodies, the two actuator cylinder bodies are fixedly communicated with the two ends of the actuator box body respectively, the interior of the actuator box body is rotationally connected with a gear shaft, and the circumference of the gear shaft is fixedly connected with a gear. The position of the bolt can be finely adjusted conveniently, the air cylinder can be broken, the two sections of actuator cylinder bodies and the actuator box jointly form a three-section structure, the actuator cylinder bodies are both of a sectional material structure, and the piston is of a cast iron structure, so that materials are greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a three-stage pneumatic actuator. Background Art

[0002] Pneumatic actuators are devices that use air pressure to open, close or adjust valves. They are also called pneumatic actuators or pneumatic devices, but they are generally called pneumatic heads. Pneumatic actuators are sometimes equipped with certain auxiliary devices.

[0003] When calibrating the stroke position of the pneumatic actuator, if too much force is used and the actuator is opened and closed widely, the internal piston gear shaft will be disengaged, the cylinder will rupture, and the cylinder will be directly damaged, making the valve unable to work normally. When adjusting the bolt, the traditional method is to directly turn the bolt, which is not convenient for fine-tuning to the appropriate position. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the prior art that excessive force may cause the internal piston gear shaft to disengage, directly damage the cylinder, and make the valve unable to work normally. When adjusting the bolt, the traditional method is to directly rotate the bolt, which is not convenient for fine-tuning to the appropriate position. A three-stage pneumatic actuator is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A three-stage pneumatic actuator comprises an actuator housing and two actuator cylinders, wherein the two actuator cylinders are respectively fixedly connected to the two ends of the actuator housing, and a gear shaft is rotatably connected inside the actuator housing, and a gear is fixedly connected to the circumference of the gear shaft;

[0007] The two actuator cylinders are respectively slidably connected with pistons, and the ends of the two pistons close to each other are fixedly connected with racks, the two racks are arranged opposite to each other, and the two racks are meshed with gears;

[0008] One side of the actuator housing is threadedly connected with two bolts, and the two bolts are respectively used for calibrating the actuator stroke position;

[0009] Two groups of fine-tuning components are respectively arranged on one side of the bolt, and the fine-tuning components are used to adjust the position of the bolt.

[0010] In a possible design, the fine-tuning assembly includes a driven tooth and a worm, the driven tooth is fixedly connected to one side of the bolt, the worm is rotatably connected to one side of the actuator housing, one side of the actuator housing is rotatably connected to a worm wheel, one side of the worm wheel is coaxially fixedly connected to a driving tooth, the driving tooth and the driven tooth are meshed, the worm wheel and the worm are meshed, the bottom of the worm is fixedly connected to a first bevel gear, one side of the actuator housing is rotatably connected to a rotating rod, the circumference of the rotating rod is fixedly connected to a second bevel gear, and the first bevel gear and the second bevel gear are meshed.

[0011] In a possible design, a diamond-shaped mounting portion is fixedly connected to the top of the gear shaft, and the two bolts are in contact with the diamond-shaped mounting portion.

[0012] In a possible design, ends of the two actuator cylinders that are away from each other are fixedly connected to end covers by screws, and a plurality of springs are fixedly connected between the two end covers and the pistons.

[0013] In a possible design, a columnar mounting portion is fixedly connected to the bottom of the actuator housing.

[0014] In a possible design, one end of the rotating rod is fixedly connected to a handle.

[0015] In this application, the three-position pneumatic actuator is a special specification actuator that provides a three-position operation mode of 0°, x°, and 90°. The middle position is achieved by mechanical limit generated by the movement of two auxiliary pistons. The middle position is adjustable. For example, an actuator with a 90° stroke can provide middle positions of 20°, 30°, 50°, 70°, etc.

[0016] When it is necessary to fine-tune the rotation angle of the diamond-shaped mounting portion, the rotating handle drives the rotating rod to rotate, the rotating rod drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, the first bevel gear drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the active tooth to rotate, and the active tooth drives the driven tooth to rotate. When the rotating rod rotates, it can drive the driven tooth to rotate slightly, which is convenient for fine-tuning the position of the bolt, can avoid cylinder rupture, and further protect the pneumatic actuator, which is convenient for adjusting to a suitable position and improving the use effect.

[0017] In the utility model, the three-stage pneumatic actuator can drive the driven teeth to rotate slightly when the rotating rod rotates through the setting of the fine-tuning component, so as to facilitate the fine-tuning of the position of the bolt and the rupture of the cylinder;

[0018] In the utility model, the three-stage pneumatic actuator is provided with two-section actuator cylinder bodies, which together with the actuator housing form a three-stage structure. The actuator cylinder bodies are all made of profile structure, and the piston is made of cast iron structure, which greatly saves materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the three-stage pneumatic actuator proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of the three-stage pneumatic actuator proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the fine-tuning component structure of the three-stage pneumatic actuator proposed by the utility model;

[0022] Figure 4 This is a schematic diagram of the solenoid valve control circuit system of the three-stage pneumatic actuator proposed by the utility model;

[0023] Figure 5 This is a schematic diagram of the solenoid valve control circuit system of the three-stage pneumatic actuator proposed by the utility model.

[0024] In the figure: 1. actuator cylinder; 2. actuator housing; 3. end cover; 4. gear shaft; 5. columnar assembly part; 6. rack; 7. piston; 8. diamond mounting part; 9. spring; 10. gear; 11. driven gear; 12. bolt; 13. driving gear; 14. worm gear; 15. worm; 16. first bevel gear; 17. second bevel gear; 18. rotating rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example 1

[0027] Reference Figure 1-Figure 3 The three-stage pneumatic actuator is used in the field of pneumatic actuators, and includes: an actuator housing 2 and two actuator cylinders 1, the two actuator cylinders 1 are respectively fixedly connected to the two ends of the actuator housing 2, the interior of the actuator housing 2 is rotatably connected with a gear shaft 4, and the circumference of the gear shaft 4 is fixedly connected with a gear 10;

[0028] Pistons 7 are slidably connected in the two actuator cylinder bodies 1, and racks 6 are fixedly connected to the ends of the two pistons 7 that are close to each other. The two racks 6 are arranged opposite to each other, and the two racks 6 are meshed with the gear 10.

[0029] One side of the actuator housing 2 is threadedly connected with two bolts 12, and the two bolts 12 are respectively used for calibrating the actuator stroke position;

[0030] A diamond-shaped mounting portion 8 is fixedly connected to the top of the gear shaft 4, and two bolts 12 are in contact with the diamond-shaped mounting portion 8;

[0031] The ends of the two actuator cylinder bodies 1 that are away from each other are fixedly connected with end covers 3 by screws, and a plurality of springs 9 are fixedly connected between the two end covers 3 and the piston 7;

[0032] A cylindrical assembly portion 5 is fixedly connected to the bottom of the actuator housing 2;

[0033] In the above technical solution, the three-position pneumatic actuator is an actuator of special specifications, which provides three-position operation modes of 0°, x°, and 90°. The middle position is achieved by mechanical limit generated by the movement of two auxiliary pistons. The middle position is adjustable, such as an actuator with a 90° stroke can provide middle positions of 20°, 30°, 50°, 70°, etc.

[0034] Preferably, the three-stage pneumatic actuator composed of two actuator cylinders 1 and an actuator box 2 in the present application document can refer to the Chinese patent announcement number: CN111043391A, which specifically indicates the principle and method of using the spring 9, and further explains the specific process of bidirectional action and unidirectional action, which will not be repeated here.

[0035] The operation of the three-position actuator requires the design of a solenoid valve control circuit system to complete the operation. The control principle is shown in the attached Figure 4 and attached Figure 5 .

[0036] Example 2

[0037] refer to Figure 3 , improved on the basis of Example 1:

[0038] Two sets of fine-tuning components, the two sets of fine-tuning components are respectively arranged on one side of the bolt 12, and the fine-tuning components are used to adjust the position of the bolt 12;

[0039] The fine-tuning assembly includes a driven tooth 11 and a worm 15. The driven tooth 11 is fixedly connected to one side of the bolt 12. The worm 15 is rotatably connected to one side of the actuator housing 2. A worm wheel 14 is rotatably connected to one side of the actuator housing 2. A driving tooth 13 is coaxially fixedly connected to one side of the worm wheel 14. The driving tooth 13 is meshed with the driven tooth 11. The worm wheel 14 is meshed with the worm 15. A first bevel gear 16 is fixedly connected to the bottom of the worm 15. A rotating rod 18 is rotatably connected to one side of the actuator housing 2. A second bevel gear 17 is fixedly connected to the circumference of the rotating rod 18. The first bevel gear 16 and the second bevel gear 17 are meshed.

[0040] In the above technical solution, when it is necessary to fine-tune the rotation angle of the diamond-shaped mounting portion 8, the rotating handle drives the rotating rod 18 to rotate, the rotating rod 18 drives the second bevel gear 17 to rotate, the second bevel gear 17 drives the first bevel gear 16 to rotate, the first bevel gear 16 drives the worm 15 to rotate, the worm 15 drives the worm wheel 14 to rotate, the worm wheel 14 drives the active tooth 13 to rotate, and the active tooth 13 drives the driven tooth 11 to rotate. When the rotating rod 18 rotates, it can drive the driven tooth 11 to rotate slightly, which is convenient for fine-tuning the position of the bolt 12, and can avoid cylinder rupture, thereby protecting the pneumatic actuator, facilitating adjustment to a suitable position, and improving the use effect.

[0041] refer to Figure 3 , one end of the rotating rod 18 is fixedly connected to a handle;

[0042] In the above technical solution, the handle is convenient for driving the rotating rod 18 to rotate.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Three-stage pneumatic actuator, characterized in that: include: An actuator housing (2) and two actuator cylinders (1), wherein the two actuator cylinders (1) are respectively fixedly connected to two ends of the actuator housing (2), a gear shaft (4) is rotatably connected inside the actuator housing (2), and a gear (10) is fixedly connected to the circumference of the gear shaft (4); A piston (7) is slidably connected in each of the two actuator cylinder bodies (1); a rack (6) is fixedly connected to one end of each of the two pistons (7) that is close to each other; the two racks (6) are arranged opposite to each other, and the two racks (6) are meshed with a gear (10); One side of the actuator housing (2) is threadedly connected with two bolts (12), and the two bolts (12) are respectively used for calibrating the actuator stroke position; Two groups of fine-tuning components are respectively arranged on one side of the bolt (12), and the fine-tuning components are used to adjust the position of the bolt (12).

2. The three-stage pneumatic actuator according to claim 1, characterized in that: The fine adjustment assembly comprises a driven tooth (11) and a worm (15); the driven tooth (11) is fixedly connected to one side of a bolt (12); the worm (15) is rotatably connected to one side of an actuator housing (2); a worm wheel (14) is rotatably connected to one side of the actuator housing (2); a driving tooth (13) is coaxially fixedly connected to one side of the worm wheel (14); the driving tooth (13) is meshed with the driven tooth (11); the worm wheel (14) is meshed with the worm (15); a first bevel gear (16) is fixedly connected to the bottom of the worm (15); a rotating rod (18) is rotatably connected to one side of the actuator housing (2); a second bevel gear (17) is fixedly connected to the circumference of the rotating rod (18); the first bevel gear (16) is meshed with the second bevel gear (17).

3. The three-stage pneumatic actuator according to claim 1, characterized in that: A rhombus-shaped mounting portion (8) is fixedly connected to the top of the gear shaft (4), and the two bolts (12) are both in contact with the rhombus-shaped mounting portion (8).

4. The three-stage pneumatic actuator according to claim 1, characterized in that: The ends of the two actuator cylinder bodies (1) that are away from each other are fixedly connected to end covers (3) by means of screws, and a plurality of springs (9) are fixedly connected between the two end covers (3) and the piston (7).

5. The three-stage pneumatic actuator according to claim 2, characterized in that: A columnar assembly portion (5) is fixedly connected to the bottom of the actuator housing (2).

6. The three-stage pneumatic actuator according to claim 2, characterized in that: One end of the rotating rod (18) is fixedly connected to a handle.

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