Three-section four-position pneumatic actuator

Abstract

The utility model provides a three-section four-position pneumatic actuator, which relates to the technical field of pneumatic actuators and comprises an actuator body, a plurality of air inlet nozzles are arranged on the front surface of the actuator body, an output shaft is arranged at the top of the actuator body, and limiting parts are fixedly connected to the positions, close to the rear sides, of the inner surface walls of the air inlet nozzles. According to the air inlet nozzle, when air passes through the inside of the air inlet nozzle, the fan blades can be driven to rotate under the action of air flow, and when the fan blades rotate, the first T-shaped ring is connected with the fan blades, the first T-shaped ring, the spiral blades and the second T-shaped ring are connected, and the first T-shaped ring and the second T-shaped ring are in contact with the air inlet nozzle through the first bearing and the second bearing, so that the air inlet nozzle is stable in rotation. When compressed air passes through the fan blades, the spiral blades can be driven to rotate at a high speed, so that impurities on the inner wall of the air inlet nozzle are scraped, and the problem that the action sensitivity of the pneumatic actuator body is reduced and even the pneumatic actuator body is blocked after the impurities are adhered to the inner wall of the air inlet nozzle is solved.

Description

Technical Field

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

[0002] The three-stage four-position pneumatic actuator is a pneumatic actuator with three working positions and four control signals. It is usually used to control the switching and adjustment of valves or other equipment. It is often used in the field of industrial automation, such as petrochemical, electric power, metallurgy, papermaking and other industries.

[0003] The main power source of the three-stage four-position pneumatic actuator is compressed gas, and the compressed gas is usually compressed by a compressor and stored in a gas tank, and then delivered to the inside of the actuator through an air pipe and an air nozzle on the surface of the actuator. When the gas tank delivers the compressed gas to the inside of the actuator through the air nozzle, it will inevitably deliver impurities in the air into the internal gear set of the pneumatic actuator. At the same time, some viscous impurities will adhere to the inner wall of the air inlet nozzle, causing the inner diameter of the air inlet nozzle to gradually shrink, affecting the sensitivity of the pneumatic actuator and even causing a jamming phenomenon. Therefore, in response to the above problems, we propose a new type of three-stage four-position pneumatic actuator. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that when the gas tank delivers compressed gas into the interior of the actuator through the air nozzle, impurities in the air will inevitably be delivered into the internal gear set of the pneumatic actuator, and at the same time, some viscous impurities will adhere to the inner wall of the air inlet nozzle, causing the inner diameter of the air inlet nozzle to gradually shrink, affecting the sensitivity of the pneumatic actuator and even causing a jamming phenomenon, and a three-stage four-position pneumatic actuator is proposed.

[0005] In order to achieve the above-mentioned objectives, the utility model adopts the following technical solutions: a three-stage four-position pneumatic actuator, comprising an actuator body, a plurality of air inlet nozzles are arranged on the front surface of the actuator body, an output shaft is arranged on the top of the actuator body, a limiting ring is fixedly connected to the inner wall of the air inlet nozzle near the rear side, a first T-ring is arranged on the front side of the limiting ring, fan blades are fixedly connected between the inner walls of the first T-ring, a spiral blade is fixedly connected to the front surface of the first T-ring, a second T-ring is fixedly connected to the front end of the spiral blade, and the outer surface of the spiral blade is tightly fitted to the inner wall of the air inlet nozzle.

[0006] Preferably, a first bearing is fixedly connected to the outer surface of the first T-shaped ring near the rear inner recess, and the outer surface of the first bearing is in contact with the inner surface wall of the air inlet nozzle.

[0007] Preferably, a second bearing is fixedly connected to the outer surface of the second T-shaped ring near the front side, and the outer surface of the second bearing is in contact with the inner surface wall of the air inlet nozzle.

[0008] Preferably, a card cover is installed on the front surface of the air inlet nozzle, and the outer diameter of the card cover is equal to the outer diameter of the air inlet nozzle.

[0009] Preferably, the front surface of the actuator body is fixedly connected to a connection seat at a position above the multiple air inlet nozzles, and a rotating shaft is rotatably connected to a position between the inner surface walls of the connection seat near the front side.

[0010] Preferably, a connecting block is fixedly connected to the outer surface of the rotating shaft, a dust cover is fixedly connected to the outer surface of the connecting block, and the dust cover and the card cover are sleeve-connected.

[0011] Preferably, a buckle is fixedly connected to the top of the connecting seat near the front side, and the buckle is snap-fitted to the connecting block.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, when the gas passes through the inside of the air inlet nozzle, the fan blades are driven to rotate under the action of the airflow. When the fan blades rotate, the first T-ring is connected to the fan blades, and the first T-ring, the spiral blades are connected to the second T-ring, and the first T-ring and the second T-ring are in contact with the air inlet nozzle through the first bearing and the second bearing. Therefore, when the compressed gas passes through the fan blades, the spiral blades are driven to rotate at a high speed, thereby scraping off the impurities on the inner wall of the air inlet nozzle, thereby avoiding the problem of decreased sensitivity or even jamming of the pneumatic actuator body due to impurities adhering to the inner wall of the air inlet nozzle.

[0014] 2. In the utility model, when the actuator body is not in use, the buckle can be pulled sideways to deform it and then detached from the connecting block, thereby releasing the fixation of the connecting block. Subsequently, the dust cover on the connecting block is pressed onto the card cover after it is rotated downward under the action of the rotating shaft to complete the closure of the air inlet nozzle. The opening method is opposite. This design has a simple structure and is easy to operate, and can effectively avoid the problem of dust entering the air inlet nozzle when the actuator body is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-stage four-position pneumatic actuator is proposed for the utility model;

[0016] Figure 2 A partial structural schematic diagram of a three-stage four-position pneumatic actuator is proposed for the utility model;

[0017] Figure 3 The utility model proposes a partial structural expansion diagram of a three-stage four-position pneumatic actuator;

[0018] Figure 4 The utility model provides a schematic diagram of the dust cover structure of a three-stage four-position pneumatic actuator.

[0019] Legend: 1. Inlet nozzle; 21. Limiting ring; 22. Card cover; 3. First T-ring; 31. First bearing; 4. Second T-ring; 41. Second bearing; 5. Fan blade; 51. Spiral blade; 6. Connecting seat; 61. Rotating shaft; 62. Buckle; 63. Connecting block; 64. Dust cover; 7. Actuator body; 71. Output shaft. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Embodiment 1, as Figure 1-Figure 4 As shown, the utility model provides a three-stage four-position pneumatic actuator, including an actuator body 7, a plurality of air inlet nozzles 1 are arranged on the front surface of the actuator body 7, an output shaft 71 is arranged on the top of the actuator body 7, a limit ring 21 is fixedly connected to the inner surface wall of the air inlet nozzle 1 near the rear side, a first T-shaped ring 3 is arranged on the front side of the limit ring 21, a fan blade 5 is fixedly connected between the inner surface walls of the first T-shaped ring 3, a spiral blade 51 is fixedly connected to the front surface of the first T-shaped ring 3, and the front end of the spiral blade 51 is fixedly connected to the There is a second T-ring 4, the outer surface of the spiral blade 51 is tightly fitted with the inner wall of the air inlet nozzle 1, the outer surface of the first T-ring 3 is fixedly connected with the first bearing 31 near the rear concave part, the outer surface of the first bearing 31 is fitted with the inner wall of the air inlet nozzle 1, the outer surface of the second T-ring 4 is fixedly connected with the second bearing 41 near the front side, the outer surface of the second bearing 41 is fitted with the inner wall of the air inlet nozzle 1, and a card cover 22 is installed on the front surface of the air inlet nozzle 1, and the outer diameter of the card cover 22 is equal to the outer diameter of the air inlet nozzle 1.

[0023] The effect achieved by the entire embodiment 1 is that when the gas source in the compressed gas tank delivers the gas into the actuator body 7 through the air pipe through the air inlet nozzle 1, the impurities in the gear set inside the actuator body 7 will be brought out by the lubricating oil, and when the impurities adhere to the inner wall of the air inlet nozzle 1, the gas passes through the inside of the air inlet nozzle 1, and the fan blade 5 is driven to rotate under the action of the airflow. When the fan blade 5 rotates, the first T-ring 3 is connected to the fan blade 5, and the first T-ring 3, the spiral blade 51 and the second T-ring 4 are connected, and the first T-ring 3 and the second T-ring 4 are in contact with the air inlet nozzle 1 through the first bearing 31 and the second bearing 41. Therefore, when the compressed gas passes through the fan blade 5, it drives the spiral blade 51 to rotate at a high speed, thereby scraping off the impurities on the inner wall of the air inlet nozzle 1, thereby avoiding the impurities adhering to the inner wall of the air inlet nozzle 1 and causing the pneumatic actuator to fail. The main body 7 has the problem of reduced sensitivity or even jamming. The outside of the air inlet nozzle 1 is concave near the front side and is connected to the card cover 22 by a threaded connection. The limit ring 21 limits the position of the first bearing 31. After removing the card cover 22, pull the second T-ring 4 to pull out the other mechanisms connected to it as a whole and clean them. The actuator body 7 is a three-stage four-position pneumatic actuator. Its working principle is that when a control signal is input, the cylinder inside the pneumatic actuator will generate corresponding actions according to the different signals, thereby pushing the actuator to the specified position. At the same time, through feedback devices such as position sensors, the actuator can monitor its own position and status in real time, and feed back information to the control system to achieve precise control and adjustment. It is an existing mature technology and will not be elaborated on here.

[0024] Embodiment 2, as Figure 1-Figure 4 As shown, the front surface of the actuator body 7 is fixedly connected to a connecting seat 6 at a position above the multiple air inlet nozzles 1, and a rotating shaft 61 is rotatably connected between the inner surface walls of the connecting seat 6 near the front side. The outer surface of the rotating shaft 61 is fixedly connected to a connecting block 63, and the outer surface of the connecting block 63 is fixedly connected to a dust cover 64. The dust cover 64 and the card cover 22 are connected in a sleeve manner. A buckle 62 is fixedly connected to the top of the connecting seat 6 near the front side, and the buckle 62 and the connecting block 63 are connected in a snap-fitting manner.

[0025] The effect achieved by the entire embodiment 2 is that, when the actuator body 7 is not in use, the buckle 62 can be pulled sideways to deform it and then detached from the connecting block 63, thereby releasing the fixation of the connecting block 63, and then the dust cover 64 on the connecting block 63 is pressed onto the card cover 22 after rotating downward under the action of the rotating shaft 61 to complete the closure of the air inlet nozzle 1. The opening method is opposite. This design has a simple structure and is easy to operate, and can effectively avoid the problem of dust entering the air inlet nozzle 1 when the actuator body 7 is not in use.

[0026] Working principle: When the gas source in the compressed gas tank sends the gas into the actuator body 7 through the air pipe and the air inlet nozzle 1, the impurities in the gear set inside the actuator body 7 will be taken out by the lubricating oil, and when the impurities adhere to the inner wall of the air inlet nozzle 1, the gas passes through the inside of the air inlet nozzle 1, and the fan blade 5 is driven to rotate under the action of the air flow. When the fan blade 5 rotates, the first T-ring 3 is connected to the fan blade 5, and the first T-ring 3, the spiral blade 51 and the second T-ring 4 are connected, and the first T-ring 3 and the second T-ring 4 are in contact with the air inlet nozzle 1 through the first bearing 31 and the second bearing 41. Therefore, when the compressed gas passes through the fan blade 5, it will drive the spiral blade 51 to rotate. The blade 51 rotates at high speed to scrape off impurities on the inner wall of the air inlet nozzle 1, thereby avoiding the problem of impurities adhering to the inner wall of the air inlet nozzle 1, which may cause the pneumatic actuator body 7 to become less sensitive or even stuck. When the actuator body 7 is not in use, the buckle 62 can be pulled sideways to deform it and then detached from the connecting block 63, thereby releasing the fixation of the connecting block 63. Subsequently, the dust cover 64 on the connecting block 63 is pressed onto the card cover 22 after rotating downward under the action of the rotating shaft 61 to complete the closure of the air inlet nozzle 1. The opening method is opposite. This design has a simple structure and is easy to operate, which can effectively avoid the problem of dust entering the air inlet nozzle 1 when the actuator body 7 is not in use.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A three-stage four-position pneumatic actuator, comprising an actuator body (7), characterized in that: The front surface of the actuator body (7) is provided with a plurality of air inlet nozzles (1), the top of the actuator body (7) is provided with an output shaft (71), the inner surface wall of the air inlet nozzle (1) is fixedly connected to a limit ring (21) near the rear side, the front side of the limit ring (21) is provided with a first T-shaped ring (3), the inner surface walls of the first T-shaped ring (3) are fixedly connected with fan blades (5), the front surface of the first T-shaped ring (3) is fixedly connected with a spiral blade (51), the front end of the spiral blade (51) is fixedly connected with a second T-shaped ring (4), and the outer surface of the spiral blade (51) is tightly fitted with the inner surface wall of the air inlet nozzle (1).

2. The three-stage four-position pneumatic actuator according to claim 1 is characterized in that: A first bearing (31) is fixedly connected to the outer surface of the first T-shaped ring (3) near the rear inner recess, and the outer surface of the first bearing (31) is in contact with the inner surface wall of the air inlet nozzle (1).

3. The three-stage four-position pneumatic actuator according to claim 2 is characterized in that: A second bearing (41) is fixedly connected to the outer surface of the second T-shaped ring (4) near the front side, and the outer surface of the second bearing (41) is in contact with the inner surface wall of the air inlet nozzle (1).

4. The three-stage four-position pneumatic actuator according to claim 3 is characterized in that: A card cover (22) is installed on the front surface of the air inlet nozzle (1), and the outer diameter of the card cover (22) is equal to the outer diameter of the air inlet nozzle (1).

5. The three-stage four-position pneumatic actuator according to claim 4 is characterized in that: The front surface of the actuator body (7) is fixedly connected to a connection seat (6) at a position above the multiple air inlet nozzles (1), and a rotating shaft (61) is rotatably connected between the inner surface walls of the connection seat (6) at a position close to the front side.

6. The three-stage four-position pneumatic actuator according to claim 5 is characterized in that: The outer surface of the rotating shaft (61) is fixedly connected with a connecting block (63), the outer surface of the connecting block (63) is fixedly connected with a dust cover (64), and the dust cover (64) and the card cover (22) are sleeve-connected.

7. The three-stage four-position pneumatic actuator according to claim 6 is characterized in that: A buckle (62) is fixedly connected to the top of the connection seat (6) near the front side, and the buckle (62) and the connection block (63) are connected in a snap-fitting manner.

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