Rotary valve pneumatic actuator

Abstract

The utility model belongs to the field of pneumatic actuators, and particularly relates to a rotary valve pneumatic actuator which comprises a shell, one side of the shell is fixedly connected with a side cover, one side of the shell is fixedly communicated with an air pipe, an inner cavity of the shell is rotatably connected with a gear shaft, and one side of the shell is provided with a protection mechanism. The exposed part of the gear shaft can be shielded through the protection shell in the protection mechanism, the protection shell can be fixedly connected with the shell through the fixing plate, the end of the gear shaft can be protected, the use efficiency is improved, and the effect of preventing an external object from accidentally touching the end of the gear shaft is achieved; the problems that due to the fact that the indicating cover and the gear shaft are coaxially and fixedly connected, if the indicating cover is accidentally clamped by an external object in the using process, transmission between an inner valve and the gear shaft is limited, the valve is inconvenient to rotate normally in serious cases, and the using efficiency of the valve is reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuators, specifically a rotary valve pneumatic actuator. Background Technology

[0002] The basic working principle of a pneumatic actuator is to use the pressure of compressed air to push the piston or diaphragm and other actuator elements, thereby generating linear or rotary motion, and thus realizing the opening, closing or regulation control of valves. When compressed air enters the air chamber of the pneumatic actuator, the air pressure pushes the piston or diaphragm to move, thereby driving the push rod or rotating shaft connected to them. The movement of the push rod or rotating shaft can be transmitted to the controlled equipment through mechanical connection to realize the control of valves, dampers, etc.

[0003] Rotary valves are opened and closed by power control of pneumatic actuators, making them more efficient. The indicator cover is usually equipped with a position indicator to visually display the current status of the pneumatic actuator, such as the open or closed position of the valve. However, the indicator cover on most pneumatic actuators is directly exposed to the outside of the housing. Since the indicator cover is coaxially fixed to the gear shaft, if the indicator cover is accidentally jammed by an external object during use, the transmission between the internal valve and the gear shaft will be restricted. In severe cases, this will make it difficult for the valve to rotate normally, resulting in a decrease in the efficiency of valve use. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, since the indicator cover and the gear shaft are coaxially fixedly connected, if the indicator cover is accidentally jammed by an external object during use, the transmission between the internal valve and the gear shaft will be restricted. In severe cases, this will cause the valve to be unable to rotate normally, resulting in a decrease in the efficiency of valve use. This utility model proposes a rotary valve pneumatic actuator.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a rotary valve pneumatic actuator, including a housing, a side cover fixedly connected to one side of the housing, an air pipe fixedly connected to one side of the housing, a gear shaft rotatably connected to the inner cavity of the housing, and a protective mechanism provided on one side of the housing.

[0006] The protective mechanism includes a protective shell, one side of which is attached to one side of an outer shell. A fixing plate is fixedly connected to the surface of the protective shell, one side of which is fixedly connected to one side of the protective shell. An indicator groove is fixedly connected to the inner wall of the protective shell, and a transparent glass is fixedly connected to the inner wall of the indicator groove.

[0007] Preferably, one end of the gear shaft is fixedly connected to a connecting shaft, the surface of the connecting shaft is slidably connected to the inner cavity of the protective shell, and an indicator needle is movably sleeved on the surface of the connecting shaft, with one side of the indicator needle abutting the inner wall of the indicator groove.

[0008] Preferably, the inner cavity of the connecting shaft is threaded with a fixing bolt, and one side of the bolt head abuts against one side of the indicator needle.

[0009] Preferably, a gear ring is fixedly sleeved on the surface of the gear shaft, and a positioning tooth plate is slidably disposed on one side of the housing, the teeth of the positioning tooth plate meshing with the teeth of the gear ring.

[0010] Preferably, the inner cavity of the protective shell is rotatably connected to a threaded rod, the surface of the threaded rod is threadedly connected to a sleeve, one side of the positioning toothed plate is fixedly connected to a connecting plate, and one end of the sleeve is fixedly connected to one side of the connecting plate.

[0011] Preferably, a limiting telescopic rod is fixedly connected to one side of the positioning tooth plate, and one end of the limiting telescopic rod is fixedly connected to the inner wall of the protective shell.

[0012] Preferably, a limiting block is fixedly connected to the surface of the gear shaft, and a limiting screw is threadedly connected to the surface of the housing, with one end of the limiting screw abutting against the surface of the limiting block.

[0013] The advantages of this utility model are:

[0014] This invention uses a protective shell in the protective mechanism to shield the exposed part of the gear shaft. The protective shell can be fixedly connected to the outer shell through a fixing plate. On the one hand, it can protect the end of the gear shaft, and on the other hand, it can observe the internal condition of the indicator groove through the transparent glass, improving the efficiency of use. It achieves the effect of preventing external objects from accidentally touching the end of the gear shaft. It solves the problem that if the indicator cover is accidentally jammed by an external object during use due to the coaxial fixed connection between the indicator cover and the gear shaft, the transmission between the internal valve and the gear shaft will be restricted, and in severe cases, the valve will not be able to rotate normally, resulting in a decrease in the efficiency of valve use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall equipment of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the protective shell of this utility model;

[0018] Figure 3 This is a schematic diagram of the gear shaft structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the indicator pin connection of this utility model;

[0020] Figure 5 This is a schematic diagram of the positioning toothed plate structure of this utility model.

[0021] In the diagram: 1. Outer shell; 2. Side cover; 3. Air pipe; 4. Gear shaft; 5. Protective mechanism; 501. Protective shell; 502. Fixing plate; 503. Indicator groove; 504. Transparent glass; 6. Connecting shaft; 7. Indicator needle; 8. Fixing bolt; 9. Gear ring; 10. Positioning tooth plate; 11. Threaded rod; 12. Sleeve; 13. Connecting plate; 14. Limiting telescopic rod; 15. Limiting block; 16. Limiting set screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses a rotary valve pneumatic actuator. (Refer to...) Figure 1 and Figure 2 A rotary valve pneumatic actuator includes a housing 1, a side cover 2 fixedly connected to one side of the housing 1, an air pipe 3 fixedly connected to one side of the housing 1, a gear shaft 4 rotatably connected to the inner cavity of the housing 1, and a protective mechanism 5 provided on one side of the housing 1.

[0025] The protective mechanism 5 includes a protective shell 501, one side of which is attached to one side of the outer shell 1. A fixing plate 502 is fixedly connected to the surface of the protective shell 501, and one side of the fixing plate 502 is fixedly connected to one side of the protective shell 501. An indicator groove 503 is fixedly connected to the inner wall of the protective shell 501, and a transparent glass 504 is fixedly connected to the inner wall of the indicator groove 503. This rotary valve pneumatic actuator can be connected to an external air injection device via an air pipe 3 on the outer shell 1 to achieve the effect of air filling and emptying. When air is filled or released inside the outer shell 1, the internal piston will mesh with the transmission gear shaft 4 to rotate. The protective shell 501 in the protective mechanism 5 can shield the exposed part of the gear shaft 4. The protective shell 501 can be fixedly connected to the outer shell 1 via the fixing plate 502. On the one hand, it can protect the end of the gear shaft 4 and minimize the accidental contact of the end of the gear shaft 4 with external objects. On the other hand, the internal condition of the indicator groove 503 can be observed through the transparent glass 504, improving the efficiency of use.

[0026] Reference Figure 2 and Figure 4 One end of the gear shaft 4 is fixedly connected to a connecting shaft 6. The surface of the connecting shaft 6 is slidably connected to the inner cavity of the protective shell 501. An indicator needle 7 is movably sleeved on the surface of the connecting shaft 6. One side of the indicator needle 7 is attached to the inner wall of the indicator groove 503. A fixing bolt 8 is threadedly connected to the inner cavity of the connecting shaft 6. One side of the bolt head of the fixing bolt 8 abuts against one side of the indicator needle 7. The indicator needle 7 is sleeved on the surface of the connecting shaft 6. The fixing bolt 8 fixes the indicator needle 7 to the gear shaft 4 and the connecting shaft 6, so that the operator can observe the indicator needle 7 inside the indicator groove 503 through the transparent glass 504 and clearly see the opening and closing status of the rotary valve.

[0027] Reference Figure 2 and 5 A gear ring 9 is fixedly sleeved on the surface of the gear shaft 4. A positioning toothed plate 10 is slidably arranged on one side of the outer shell 1. The teeth of the positioning toothed plate 10 mesh with the teeth of the gear ring 9. A threaded rod 11 is rotatably connected to the inner cavity of the protective shell 501. A sleeve 12 is threadedly connected to the surface of the threaded rod 11. A connecting plate 13 is fixedly connected to one side of the positioning toothed plate 10. One end of the sleeve 12 is fixedly connected to one side of the connecting plate 13. Through the gear ring 9 and the positioning toothed plate 10, the gear ring 9 and the positioning toothed plate 10 can be regarded as a stop mechanism for the gear shaft 4. When the pneumatic actuator is in normal use, the threaded rod 11 can be turned. Since the threaded rod 11 and the sleeve 12 are threadedly connected, the threaded rod 11 rotates while driving the sleeve 12 to move along the surface and pushes the gear ring 9 on the surface of the gear shaft 4 to mesh, thereby fixing the position of the gear shaft 4. This ensures the normal use of the rotary valve and reduces the need to continuously inject air into the pneumatic actuator, saving energy.

[0028] Reference Figure 2 and Figure 5 A limiting telescopic rod 14 is fixedly connected to one side of the positioning tooth plate 10. One end of the limiting telescopic rod 14 is fixedly connected to the inner wall of the protective shell 501. Through the setting of the limiting telescopic rod 14, while the threaded rod 11 drives the sleeve 12 to push the positioning tooth plate 10 to move, the limiting telescopic rod 14 simultaneously retracts or extends, thereby improving the stability of the positioning tooth plate 10 during movement and meshing positioning.

[0029] Reference Figure 1 and Figure 3 A limit block 15 is fixedly connected to the surface of the gear shaft 4, and a limit screw 16 is threadedly connected to the surface of the housing 1. One end of the limit screw 16 abuts against the surface of the limit block 15. The main function of the limit block 15 is to limit the stroke of the pneumatic actuator by setting the limit screw 16. By turning the limit screw 16, the extension length is changed, so as to avoid the gear shaft 4 from deviating from the safe range or exceeding the required range. This ensures that the pneumatic actuator operates within the specified stroke and avoids damage or failure caused by excessive movement.

[0030] Working principle: This rotary valve pneumatic actuator can be connected to an external air injection device via an air pipe 3 on the outer casing 1 to achieve the effect of air filling and emptying. When air is introduced or released inside the outer casing 1, the internal piston meshes with the transmission gear shaft 4 to rotate. The protective shell 501 in the protective mechanism 5 can shield the exposed part of the gear shaft 4. The protective shell 501 can be fixedly connected to the outer casing 1 via a fixing plate 502. On the one hand, it protects the end of the gear shaft 4, minimizing accidental contact with the end of the gear shaft 4 by external objects; on the other hand, it allows observation of the internal condition of the indicator groove 503 through the transparent glass 504. The indicator needle 7 is sleeved on the surface of the connecting shaft 6, and is fixed... The fixed bolt 8 secures the indicator needle 7 to the gear shaft 4 and the connecting shaft 6, allowing the operator to observe the indicator needle 7 inside the indicator groove 503 through the transparent glass 504 and clearly understand the opening and closing status of the rotary valve. During normal operation of the pneumatic actuator, the threaded rod 11 can be turned. Due to the threaded connection between the threaded rod 11 and the sleeve 12, the rotation of the threaded rod 11 drives the sleeve 12 to move along the surface, and the other end pushes the gear ring 9 on the surface of the gear shaft 4 to mesh, thereby fixing the position of the gear shaft 4. This ensures the normal operation of the rotary valve and reduces the need to continuously inject air into the pneumatic actuator, saving energy.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A rotary valve pneumatic actuator, characterized in that: Includes an outer shell (1), a side cover (2) is fixedly connected to one side of the outer shell (1), an air pipe (3) is fixedly connected to one side of the outer shell (1), a gear shaft (4) is rotatably connected to the inner cavity of the outer shell (1), and a protective mechanism (5) is provided on one side of the outer shell (1). The protective mechanism (5) includes a protective shell (501), one side of which is attached to one side of the outer shell (1). A fixing plate (502) is fixedly connected to the surface of the protective shell (501), one side of which is fixedly connected to one side of the protective shell (501). An indicator groove (503) is fixedly connected to the inner wall of the protective shell (501), and a transparent glass (504) is fixedly connected to the inner wall of the indicator groove (503).

2. The rotary valve pneumatic actuator according to claim 1, characterized in that: One end of the gear shaft (4) is fixedly connected to a connecting shaft (6). The surface of the connecting shaft (6) is slidably connected to the inner cavity of the protective shell (501). An indicator needle (7) is movably sleeved on the surface of the connecting shaft (6). One side of the indicator needle (7) is attached to the inner wall of the indicator groove (503).

3. A rotary valve pneumatic actuator according to claim 2, characterized in that: The inner cavity of the connecting shaft (6) is threaded with a fixing bolt (8), and one side of the bolt head of the fixing bolt (8) abuts against one side of the indicator needle (7).

4. The rotary valve pneumatic actuator according to claim 1, characterized in that: A gear ring (9) is fixedly sleeved on the surface of the gear shaft (4), and a positioning tooth plate (10) is slidably provided on one side of the outer shell (1). The teeth of the positioning tooth plate (10) mesh with the teeth of the gear ring (9).

5. A rotary valve pneumatic actuator according to claim 4, characterized in that: The inner cavity of the protective shell (501) is rotatably connected to a threaded rod (11), and a sleeve (12) is threadedly connected to the surface of the threaded rod (11). A connecting plate (13) is fixedly connected to one side of the positioning toothed plate (10), and one end of the sleeve (12) is fixedly connected to one side of the connecting plate (13).

6. A rotary valve pneumatic actuator according to claim 4, characterized in that: One side of the positioning toothed plate (10) is fixedly connected to a limiting telescopic rod (14), and one end of the limiting telescopic rod (14) is fixedly connected to the inner wall of the protective shell (501).

7. A rotary valve pneumatic actuator according to claim 1, characterized in that: A limiting block (15) is fixedly connected to the surface of the gear shaft (4), and a limiting screw (16) is threadedly connected to the surface of the outer shell (1). One end of the limiting screw (16) abuts against the surface of the limiting block (15).

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