Drainage pneumatic actuator

Abstract

The utility model relates to the technical field of pneumatic actuators, in particular to a drainage pneumatic actuator which comprises a pneumatic actuator body, an annular flexible air bag is fixedly installed at the lower end of the outer wall of the pneumatic actuator body, and the annular flexible air bag is communicated with the air output end of the pneumatic actuator body. A protective shell is fixedly connected to the position, located on the annular flexible air bag, of the outer side of the pneumatic actuator body in a sleeving mode, a cavity is formed in the protective shell, and the annular flexible air bag is located in the cavity. And through the arrangement of the protective shell and the top cover, the annular flexible air bag can be protected in all directions, air leakage of the pneumatic actuator body caused by damage of the annular flexible air bag after long-time use is avoided, and the service life of the pneumatic actuator body is prolonged.

Description

Technical Field

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

[0002] Pneumatic actuators are actuators 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, commonly used are valve positioners and handwheel mechanisms. The function of the valve positioner is to use the feedback principle to improve the performance of the actuator so that the actuator can achieve accurate positioning according to the control signal of the controller. The function of the handwheel mechanism is to directly manipulate the control valve when the control system fails due to power outages, gas outages, no output of the controller or failure of the actuator, so as to maintain normal production.

[0003] In application number: CN202323057250.2, a pneumatic actuator is disclosed, in which an annular flexible airbag is fixedly connected to the outer side of the gas output end of the pneumatic actuator housing. By pressing the annular flexible airbag, the gas inside the pneumatic actuator can be quickly discharged from the one-way exhaust valve, so that the gas inside the pneumatic actuator will not continue to compress the spring, so that the spring can quickly return to its original state, thereby achieving rapid closing of the valve.

[0004] However, the annular flexible airbag of the pneumatic actuator is exposed to the outside for a long time and is easily damaged, resulting in air leakage and inability to use the pneumatic actuator normally. In addition, manual pressing of the annular flexible airbag is inefficient, resulting in low exhaust efficiency. Therefore, a hydrophobic pneumatic actuator is proposed, which can allow a protective shell to protect the annular flexible airbag and prevent the annular flexible airbag from being damaged during daily use. Utility Model Content

[0005] In view of the problems in the prior art, the utility model provides a hydrophobic pneumatic actuator, which can allow the protective shell to protect the annular flexible airbag and prevent the annular flexible airbag from being damaged during daily use.

[0006] The technical solution adopted by the utility model to solve its technical problems is a hydrophobic pneumatic actuator, comprising a pneumatic actuator body, an annular flexible airbag is fixedly installed at the lower end of the outer wall of the pneumatic actuator body, the annular flexible airbag is connected to the gas output end of the pneumatic actuator body, a protective shell is fixedly sleeved on the outer side of the pneumatic actuator body at the annular flexible airbag, a cavity is provided inside the protective shell, and the annular flexible airbag is located in the cavity.

[0007] By adopting the above technical solution, the setting of the protective shell and the top cover can provide all-round protection for the annular flexible airbag, avoiding the damage of the annular flexible airbag and causing leakage of the pneumatic actuator body after long-term use, thereby enhancing the service life of the pneumatic actuator body.

[0008] Specifically, push rods are movably inserted into the four sides of the protective shell. There are four push rods. One end of the four push rods close to the pneumatic actuator body is fixedly connected to one side of the push plate. The push plate is arranged inside the cavity.

[0009] By adopting the above technical solution, the push plate can press the annular flexible airbag when facing the annular flexible airbag, and the pressing area of ​​the push plate is larger, so that the gas in the annular flexible airbag is discharged more quickly, thereby improving the exhaust efficiency.

[0010] Specifically, one end of the four push rods away from the pneumatic actuator body is fixedly connected to one side of the booster block.

[0011] By adopting the above technical solution, when exhaust is required, the booster block arranged on the outside of the protective shell is pressed, so that the booster block pushes the push rod and the push plate to press the annular flexible airbag in the protective shell.

[0012] Specifically, a top cover is buckled on the top of the protective shell.

[0013] By adopting the above technical solution, the top cover can block the top of the protective shell to achieve all-round protection of the annular flexible airbag, and the top cover can be removed to facilitate maintenance of the device in the cavity.

[0014] Specifically, an air inlet is provided at the top of the pneumatic actuator body, and a one-way exhaust valve is fixedly connected to the bottom end of the annular flexible airbag.

[0015] By adopting the above technical solution, the pneumatic actuator body realizes air intake through the air inlet, and exhausts air from the one-way exhaust valve by pressing the annular flexible airbag.

[0016] Beneficial effects of the utility model:

[0017] (1) The hydrophobic pneumatic actuator described in the utility model can provide all-round protection for the annular flexible airbag by providing a protective shell and a top cover, thereby preventing the annular flexible airbag from being damaged and causing air leakage in the pneumatic actuator body after long-term use, thereby extending the service life of the pneumatic actuator body.

[0018] (2) The hydrophobic pneumatic actuator described in the utility model presses the annular flexible airbag through a push plate with a larger area, so that the gas in the annular flexible airbag is discharged more quickly, thereby improving the exhaust efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the protective shell of the utility model;

[0022] Figure 3 It is a schematic diagram of the planar structure of the utility model;

[0023] In the figure: 1. push rod; 2. booster block; 3. one-way exhaust valve; 4. protective shell; 5. top cover; 6. pneumatic actuator body; 7. air inlet; 8. cavity; 9. push plate; 10. annular flexible airbag. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In order to allow the protective shell to protect the annular flexible airbag and prevent the annular flexible airbag from being damaged during daily use, as an embodiment of the utility model, Figure 1-Figure 3 As shown, a hydrophobic pneumatic actuator described in the utility model includes a pneumatic actuator body 6, an annular flexible airbag 10 is fixedly installed at the lower end of the outer wall of the pneumatic actuator body 6, the annular flexible airbag 10 is connected to the gas output end of the pneumatic actuator body 6, and a protective shell 4 is fixedly sleeved on the outer side of the pneumatic actuator body 6 at the annular flexible airbag 10, a cavity 8 is provided inside the protective shell 4, and the annular flexible airbag 10 is located in the cavity 8.

[0026] When in use, the protective shell 4 can completely surround and protect the annular flexible airbag 10 , thereby preventing the annular flexible airbag 10 from being damaged during long-term use, thereby preventing the pneumatic actuator body 6 from leaking.

[0027] For example, Figure 1-3 As shown, the new use also includes that push rods 1 are movably inserted into the four sides of the protective shell 4, and four push rods 1 are provided. One end of the four push rods 1 close to the pneumatic actuator body 6 is fixedly connected to one side of the push plate 9, and the push plate 9 is arranged inside the cavity 8.

[0028] When in use, the push plate 9 faces the annular flexible airbag 10 and can press the annular flexible airbag 10 , and the pressing area of ​​the push plate 9 is larger, so that the gas in the annular flexible airbag 10 is discharged more quickly, thereby improving the exhaust efficiency.

[0029] For example, Figure 1-3 As shown, the present invention also includes that one end of the four push rods 1 away from the pneumatic actuator body 6 is fixedly connected to one side of the booster block 2.

[0030] During use, when exhaust is required, the boosting block 2 arranged outside the protective shell 4 is pressed, so that the boosting block 2 pushes the push rod 1 and the push plate 9 to press the annular flexible airbag 10 in the protective shell 4 .

[0031] For example, Figure 1-3 As shown, the present invention also includes that a top cover 5 is buckled on the top of the protective shell 4.

[0032] When in use, the top cover 5 can block the top of the protective shell 4 to achieve all-round protection for the annular flexible airbag 10, and the top cover 5 can be removed to facilitate maintenance of the device in the cavity 8.

[0033] For example, Figure 1-3 As shown, the new use also includes that the top end of the pneumatic actuator body 6 is provided with an air inlet 7, and the bottom end of the annular flexible airbag 10 is fixedly connected to a one-way exhaust valve 3.

[0034] When in use, the pneumatic actuator body 6 takes in air through the air inlet 7 , and exhausts air from the one-way exhaust valve 3 by pressing the annular flexible airbag 10 .

[0035] When the utility model is in use, when exhaust is needed, by pressing the booster block 2 arranged on the outside of the protective shell 4, the booster block 2 pushes the push rod 1 and the push plate 9 to press the annular flexible airbag 10 in the protective shell 4. The annular flexible airbag 10 is pressed by the push plate 9 to quickly discharge the internal gas of the pneumatic actuator body 6 from the one-way exhaust valve 3, and the area pressed by the push plate 9 is larger, so that the gas in the annular flexible airbag 10 is discharged more quickly, thereby improving the exhaust efficiency.

[0036] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydrophobic pneumatic actuator, comprising a pneumatic actuator body (6), characterized in that: An annular flexible airbag (10) is fixedly mounted on the lower end of the outer wall of the pneumatic actuator body (6), and the annular flexible airbag (10) is connected to the gas output end of the pneumatic actuator body (6). A protective shell (4) is fixedly sleeved on the outer side of the pneumatic actuator body (6) at the annular flexible airbag (10), and a cavity (8) is provided inside the protective shell (4), and the annular flexible airbag (10) is located in the cavity (8).

2. A hydrophobic pneumatic actuator according to claim 1, characterized in that: Push rods (1) are movably inserted into the four sides of the protective shell (4), and there are four push rods (1). One end of the four push rods (1) close to the pneumatic actuator body (6) is fixedly connected to one side of a push plate (9), and the push plate (9) is arranged inside the cavity (8).

3. A hydrophobic pneumatic actuator according to claim 2, characterized in that: One end of each of the four push rods (1) away from the pneumatic actuator body (6) is fixedly connected to one side of the booster block (2).

4. A hydrophobic pneumatic actuator according to claim 1, characterized in that: A top cover (5) is buckled onto the top of the protective shell (4).

5. The hydrophobic pneumatic actuator according to claim 1, characterized in that: An air inlet (7) is provided at the top end of the pneumatic actuator body (6), and a one-way exhaust valve (3) is fixedly connected to the bottom end of the annular flexible airbag (10).

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