Pneumatic actuator

Abstract

The invention relates to the technical field of actuators, and provides a pneumatic actuator which comprises an actuator body and an outer air channel plate installed on the actuator body. Gas enters and exits the actuator body through the outer gas channel plate. The actuator body comprises a cylinder body; the two ends of the actuator body are arranged to be a first gas storage space and a second gas storage space correspondingly. A first hole, a second hole, a third hole and a first channel are formed in the outer air channel plate, the first hole is communicated with the first air port of the cylinder body, the second hole is communicated with the second air port of the cylinder body, and the first hole and the second hole are through holes respectively; the third hole is formed in the side, away from the cylinder body, of the outer air channel plate and communicates with the first channel, and the first channel penetrates through the outer air channel plate in the axial direction of the cylinder body. According to the pneumatic actuator provided by the invention, the problems of poor sealing performance between the air storage cylinder and the actuator body, color difference and error can be avoided, and meanwhile, mass production of the pneumatic actuator can be facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of actuators, and in particular to a pneumatic actuator. Background Art

[0002] With the realization of industrial automation production, automatic control valves are generally used in the field of fluid control. Pneumatic actuators are actuators that use air pressure to drive the opening, closing or regulating of valves, also known as pneumatic actuators or pneumatic heads. Existing pneumatic actuators are divided into split pneumatic actuators and integrated pneumatic actuators according to their structure.

[0003] The split pneumatic actuator includes an actuator body and an air storage cylinder attached to both sides of the actuator body. The split pneumatic actuator has the problem of poor sealing between the air storage cylinder and the actuator body, which reduces the life of the pneumatic actuator, and also has the problem of color difference and misshape.

[0004] The integrated pneumatic actuator includes an actuator body and two end covers respectively installed on both ends of the actuator body, wherein the two ends of the actuator body are respectively configured as a space for piston movement and an air storage space, which results in a longer length of the actuator body and a longer length of each channel opened on the actuator body, making this type of pneumatic actuator difficult to process and inconvenient for mass production; on the other hand, the space of the actuator body is limited and cannot meet the multi-air channel process requirements. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a pneumatic actuator that can solve or at least alleviate the above-mentioned problems, so as to avoid the poor sealing between the air storage cylinder and the actuator body, as well as the problems of color difference and misshape, and at the same time facilitate the mass production of the pneumatic actuator.

[0006] The technical solution provided by the present invention is: a pneumatic actuator, comprising an actuator body, and an outer airway plate installed on the actuator body; gas enters and exits the actuator body through the outer airway plate; the actuator body comprises a cylinder body; the two ends of the actuator body are respectively set as a first air storage space and a second air storage space; the outer airway plate is provided with a first hole, a second hole, a third hole and a first channel, the first hole is connected to the first air port of the cylinder body, the second hole is connected to the second air port of the cylinder body, and the first hole and the second hole are respectively through holes; the third hole is arranged on the side of the outer airway plate away from the cylinder body, and is connected to the first channel, and the first channel passes through the outer airway plate along the axial direction of the cylinder body.

[0007] In some embodiments, the outer airway plate is further provided with a fourth hole and a second channel; the fourth hole is arranged on the side of the outer airway plate away from the cylinder body and is connected to the second channel, and the second channel penetrates the outer airway plate along the axial direction of the cylinder body.

[0008] In some embodiments, the actuator body also includes a first end cover and a second end cover respectively installed on the two ends of the cylinder body, a first piston and a second piston installed in the cylinder body, a first partition plate arranged between the first end cover and the first piston, and a second partition plate arranged between the second end cover and the second piston.

[0009] In some embodiments, the area inside the cylinder body between the first piston and the second piston is the first space; the area inside the cylinder body between the second piston and the second partition is the second space; the area inside the cylinder body between the first piston and the first partition is the third space; the second end cover, the second partition and the end of the cylinder body adjacent to the second partition together form a first air storage space; the first end cover, the first partition and the end of the cylinder body adjacent to the first partition together form a second air storage space.

[0010] In some embodiments, the first air port, the second air port, the first pipeline, the third air port, the fourth air port, the fifth air port and the sixth air port are provided on one side of the cylinder body on which the outer air duct plate is installed; the first air port passes through the wall portion of the corresponding side of the cylinder body and is connected to the first space; the second air port is connected to the first pipeline, the first pipeline is extended along the axial direction of the cylinder body, and the two ends of the first pipeline are respectively connected to the third air port and the fourth air port, the third air port is connected to the second space, and the fourth air port is connected to the third space, the fifth air port and the sixth air port are respectively arranged on the two ends of the cylinder body and respectively pass through the wall portion of the corresponding side of the cylinder body, the fifth air port is connected to the first air storage space, and the sixth air port is connected to the second air storage space; the first channel is connected to the fifth air port through the fifth hole, and is connected to the sixth air port through the sixth hole.

[0011] In some embodiments, a seventh air port and an eighth air port are further provided on the side of the cylinder body on which the outer air duct plate is installed; the seventh air port and the eighth air port are respectively arranged on the two ends of the cylinder body, and respectively penetrate the wall portions of the corresponding sides of the cylinder body; the seventh air port is connected to the first air storage space, and the eighth air port is connected to the second air storage space; the second channel is connected to the seventh air port through the seventh hole, and is connected to the eighth air port through the eighth hole.

[0012] In some embodiments, the seventh gas port is disposed adjacent to the fifth gas port, and the eighth gas port is disposed adjacent to the sixth gas port.

[0013] In some embodiments, the cylinder body is provided with a first recess at a position corresponding to the first partition, and the side of the first partition facing the first piston is stopped on the side wall of the first recess, and the other side of the first partition facing the first end cover is stopped on the first stop member; the cylinder body is provided with a first recessed groove at a position corresponding to the first stop member, and the first stop member is partially engaged in the first groove.

[0014] In some embodiments, the cylinder body is provided with a second recess at a position corresponding to the second partition, the side of the second partition facing the second piston is stopped on the side wall of the second recess, and the other side of the second partition facing the second end cover is stopped on the second stop member; the cylinder body is provided with a second recessed groove at a position corresponding to the second stop member, and the second stop member is partially engaged in the second groove.

[0015] In some embodiments, the first stopper and the second stopper are respectively a retaining spring.

[0016] Compared with the prior art, the beneficial effects of the present invention are at least: 1. The pneumatic actuator provided by the present invention can avoid the problems of poor sealing between the air storage cylinder and the actuator body, as well as color difference and misshape, and can facilitate the mass production of the pneumatic actuator.

[0017] 2. The pneumatic actuator provided by the present invention avoids the problem of long lengths of the channels opened on the actuator body through the external airway plate, making the pneumatic actuator easy to process and thus facilitating mass production of the pneumatic actuator.

[0018] 3. In the present invention, the second end cover, the second partition and the end of the cylinder body adjacent to the second partition together form a first air storage space, and the first end cover, the first partition and the end of the cylinder body adjacent to the first partition together form a second air storage space, thereby avoiding the problem of poor sealing between the air storage cylinders attached to both sides of the actuator body and the actuator body, and improving the service life of the pneumatic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional view of a pneumatic actuator according to an embodiment of the present invention is shown.

[0020] Figure 2 Shows Figure 1 Exploded view of a pneumatic actuator shown.

[0021] Figure 3A Shows Figure 1 A plan view of a pneumatic actuator is shown.

[0022] Figure 3B Shown along Figure 3A Sectional view along line AA.

[0023] Figure 4 Shows Figure 1 Another exploded view of the pneumatic actuator is shown.

[0024] Figure 5 Shows Figure 1 Another exploded view of the pneumatic actuator is shown.

[0025] Figure 6 Shows Figure 1 A perspective perspective view of an outer airway plate of a pneumatic actuator is shown.

[0026] Fig. 7A A plan view of the outer airway plate is shown.

[0027] Figure 7B Shown along Fig. 7A Cross-sectional view along line BB in FIG.

[0028] Fig. 8A Shows Figure 1 A plan view of the cylinder body of a pneumatic actuator is shown.

[0029] Figure 8B Shown along Fig. 8A Cross-sectional view along line CC in FIG.

[0030] Description of the accompanying drawings: 1-actuator body; 11-cylinder body; 111-first air port; 112-second air port; 113-first pipeline; 114-third air port; 115-fourth air port; 116-fifth air port; 117-sixth air port; 118-seventh air port; 119-eighth air port; 12-first end cover; 13-second end cover; 14-first stopper; 15-second stopper; 16-first piston; 17- The second piston; 18-the first partition; 19-the second partition; 2-the outer airway plate; 21-the first hole; 22-the second hole; 23-the third hole; 24-the fourth hole; 25-the first channel; 26-the second channel; 271-the fifth hole; 272-the sixth hole; 281-the seventh hole; 282-the eighth hole; 31-the first space; 32-the second space; 33-the third space; 34-the first air storage space; 35-the second air storage space. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0035] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0036] like Figure 1 and Figure 2 As shown, the pneumatic actuator provided by the present invention includes an actuator body 1 and an outer airway plate 2 mounted on the actuator body 1. Gas enters and exits the actuator body 1 through the outer airway plate 2. Figure 3A and Figure 3B The actuator body 1 includes a cylinder body 11, a first end cover 12 and a second end cover 13 respectively mounted on both ends of the cylinder body 11, a first piston 16 and a second piston 17 mounted in the cylinder body 11, a first partition plate 18 disposed between the first end cover 12 and the first piston 16, and a second partition plate 19 disposed between the second end cover 13 and the second piston 17. Both ends of the actuator body 1 are respectively set as a first air storage space 34 and a second air storage space 35.

[0037] Preferably, the cylinder body 11 is roughly a hollow cylinder with two ends open. Also preferably, the inner side of the cylinder body 11 is roughly cylindrical. The area inside the cylinder body 11 between the first piston 16 and the second piston 17 is the first space 31. The area inside the cylinder body 11 between the second piston 17 and the second partition 19 is the second space 32. The area inside the cylinder body 11 between the first piston 16 and the first partition 18 is the third space 33. The second end cover 13, the second partition 19 and the end of the cylinder body 11 adjacent to the second partition 19 together form a first gas storage space 34. The first end cover 12, the first partition 18 and the end of the cylinder body 11 adjacent to the first partition 18 together form a second gas storage space 35. The cylinder body 11 is provided with a first recess at a position corresponding to the first partition 18, and the first partition 18 is stopped on the side wall of the first recess on one side facing the first piston 16, and the first partition 18 is stopped on the first stopper 14 on the other side facing the first end cover 12. The cylinder body 11 is provided with a first groove formed by a depression at a position corresponding to the first stopper 14, and the first stopper 14 is partially engaged in the first groove. Preferably, the first stopper 14 is a circlip. The cylinder body 11 is provided with a second notch at a position corresponding to the second partition 19, and the second partition 19 is stopped on the side wall of the second notch on the side facing the second piston 17, and the second partition 19 is stopped on the second stopper 15 on the other side facing the second end cover 13. The cylinder body 11 is provided with a second groove formed by a depression at a position corresponding to the second stopper 15, and the second stopper 15 is partially engaged in the second groove. Preferably, the second stopper 15 is a circlip. The first stopper 14 and the second stopper 15, which are respectively set as circlips, can be easily positioned in the corresponding grooves, and the corresponding partitions can be limited in the cylinder body 11 by cooperating with the corresponding notches. The outer airway plate 2 is installed on one side of the cylinder body 11.

[0038] Also refer to Figure 4 , Figure 5 , Fig. 8A and Figure 8BA first air port 111, a second air port 112, a first pipeline 113, a third air port 114, a fourth air port 115, a fifth air port 116 and a sixth air port 117 are provided on one side of the cylinder body 11 where the outer airway plate 2 is installed; wherein the first air port 111 passes through the wall portion of the corresponding side of the cylinder body 11 and is connected to the first space 31; the second air port 112 is connected to the first pipeline 113, the first pipeline 113 is extended along the axial direction of the cylinder body 11, the two ends of the first pipeline 113 are respectively connected to the third air port 114 and the fourth air port 115, the third air port 114 is connected to the second space 32, the fourth air port 115 is connected to the third space 33, the fifth air port 116 and the sixth air port 117 are respectively arranged on the two ends of the cylinder body 11, and respectively pass through the wall portion of the corresponding side of the cylinder body 11, the fifth air port 116 is connected to the first air storage space 34, and the sixth air port 117 is connected to the second air storage space 35. Preferably, a seventh air port 118 and an eighth air port 119 are further provided on the side of the cylinder body 11 on which the outer airway plate 2 is installed. The seventh air port 118 and the eighth air port 119 are respectively arranged on the two ends of the cylinder body 11, and respectively penetrate the wall portions of the corresponding sides of the cylinder body 11. Preferably, the seventh air port 118 is arranged adjacent to the fifth air port 116, and the eighth air port 119 is arranged adjacent to the sixth air port 117. In this embodiment, the seventh air port 118 is communicated with the first air storage space 34, and the eighth air port 119 is communicated with the second air storage space 35. A solenoid valve is installed on the side of the outer airway plate 2 facing away from the cylinder body 11. According to the working conditions, the gas can enter and exit the various spaces of the cylinder body 11 through the outer airway plate 2.

[0039] Also refer to Figures 4 to 7B, the outer airway plate 2 is roughly rectangular. The outer airway plate 2 is provided with a first hole 21, a second hole 22, a third hole 23 and a first channel 25, wherein the first hole 21 is connected to the first air port 111 of the cylinder body 11, the second hole 22 is connected to the second air port 112, and the first hole 21 and the second hole 22 are through holes respectively; the third hole 23 is arranged on the side of the outer airway plate 2 away from the cylinder body 11, and is connected to the first channel 25, and the first channel 25 penetrates the outer airway plate 2 along the axial direction of the cylinder body 11. The airflow can enter and exit the first space 31 through the first hole 21 and the first air port 111. The airflow can enter and exit the second space 32 through the second hole 22, the second air port 112, the first pipeline 113 and the third air port 114, and can enter and exit the third space 33 through the second hole 22, the second air port 112, the first pipeline 113 and the fourth air port 115. The direction of the airflow in and out of the pneumatic actuator is changed by the control of the solenoid valve to change the movement direction of the first piston 16 and the second piston 17. Plugs are installed at both ends of the first channel 25. Preferably, the outer airway plate 2 is also provided with a fourth hole 24 and a second channel 26, wherein the fourth hole 24 is arranged on the side of the outer airway plate 2 away from the cylinder body 11 and is connected to the second channel 26, and the second channel 26 penetrates the outer airway plate 2 along the axial direction of the cylinder body 11. Plugs are installed at both ends of the second channel 26.

[0040] In this embodiment, the first channel 25 is connected to the fifth air port 116 through the fifth hole 271, and is connected to the sixth air port 117 through the sixth hole 272. The second channel 26 is connected to the seventh air port 118 through the seventh hole 281, and is connected to the eighth air port 119 through the eighth hole 282. The airflow can enter the first air storage space 34 from the third hole 23 through the first channel 25, then through the fifth hole 271 and the fifth air port 116, and enter the second air storage space 35 through the sixth hole 272 and the sixth air port 117; or the airflow can enter the first air storage space 34 from the fourth hole 24 through the second channel 26, then through the seventh hole 281 and the seventh air port 118, and enter the second air storage space 35 through the eighth hole 282 and the eighth air port 119. When in use, according to different working conditions, the first channel 25 or the second channel 26 can be selected. It can be imagined that a sealing member is provided between the corresponding holes and the air ports to ensure the sealing between them.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic actuator, characterized in that: It includes an actuator body and an outer airway plate installed on the actuator body; gas enters and exits the actuator body through the outer airway plate; the actuator body includes a cylinder body; the two ends of the actuator body are respectively set as a first air storage space and a second air storage space; the outer airway plate is provided with a first hole, a second hole, a third hole and a first channel, the first hole is connected to the first air port of the cylinder body, the second hole is connected to the second air port of the cylinder body, and the first hole and the second hole are respectively through holes; the third hole is arranged on the side of the outer airway plate away from the cylinder body, and is connected to the first channel, and the first channel penetrates the outer airway plate along the axial direction of the cylinder body.

2. The pneumatic actuator according to claim 1, characterized in that: The outer airway plate is also provided with a fourth hole and a second channel; the fourth hole is arranged on a side of the outer airway plate away from the cylinder body and is communicated with the second channel, and the second channel penetrates the outer airway plate along the axial direction of the cylinder body.

3. The pneumatic actuator according to claim 2, characterized in that: The actuator body also includes a first end cover and a second end cover respectively mounted on both ends of the cylinder body, a first piston and a second piston mounted in the cylinder body, a first partition plate arranged between the first end cover and the first piston, and a second partition plate arranged between the second end cover and the second piston.

4. The pneumatic actuator according to claim 3, characterized in that: The area inside the cylinder body between the first piston and the second piston is the first space; the area inside the cylinder body between the second piston and the second partition is the second space; the area inside the cylinder body between the first piston and the first partition is the third space; the second end cover, the second partition and the end of the cylinder body adjacent to the second partition together form the first air storage space; the first end cover, the first partition and the end of the cylinder body adjacent to the first partition together form the second air storage space.

5. The pneumatic actuator according to claim 4, characterized in that: The first air port, the second air port, the first pipeline, the third air port, the fourth air port, the fifth air port and the sixth air port are respectively provided on the side of the cylinder body where the outer airway plate is installed; the first air port passes through the wall portion of the corresponding side of the cylinder body and is connected with the first space; the second air port is connected with the first pipeline, the first pipeline is extended along the axial direction of the cylinder body, the two ends of the first pipeline are respectively connected with the third air port and the fourth air port, the third air port is connected with the second space, the fourth air port is connected with the third space, the fifth air port and the sixth air port are respectively arranged on the two ends of the cylinder body and respectively pass through the wall portion of the corresponding side of the cylinder body, the fifth air port is connected with the first air storage space, and the sixth air port is connected with the second air storage space; the first channel is connected with the fifth air port through the fifth hole, and is connected with the sixth air port through the sixth hole.

6. The pneumatic actuator according to claim 5, characterized in that: A seventh air port and an eighth air port are also provided on the side of the cylinder body on which the outer airway plate is installed; the seventh air port and the eighth air port are respectively arranged on the two end portions of the cylinder body, and respectively penetrate the wall portions of the corresponding sides of the cylinder body; the seventh air port is connected to the first air storage space, and the eighth air port is connected to the second air storage space; the second channel is connected to the seventh air port through the seventh hole, and is connected to the eighth air port through the eighth hole.

7. The pneumatic actuator according to claim 6, characterized in that: The seventh gas port is disposed adjacent to the fifth gas port, and the eighth gas port is disposed adjacent to the sixth gas port.

8. The pneumatic actuator according to claim 3, characterized in that: The cylinder body is provided with a first recess at a position corresponding to the first partition, and the first partition is stopped on the side wall of the first recess on one side facing the first piston, and the other side of the first partition is stopped on the first stopper on the first end cover; the cylinder body is provided with a first recessed groove at a position corresponding to the first stopper, and the first stopper is partially engaged in the first groove.

9. The pneumatic actuator according to claim 8, characterized in that: The cylinder body is provided with a second recess at a position corresponding to the second partition, and the side of the second partition facing the second piston is stopped on the side wall of the second recess, and the other side of the second partition facing the second end cover is stopped on the second stop member; the cylinder body is provided with a second recessed groove at a position corresponding to the second stop member, and the second stop member is partially engaged in the second groove.

10. The pneumatic actuator according to claim 9, characterized in that: The first stopper and the second stopper are respectively a clip spring.

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