An electric actuator with automatic overload protection function

Abstract

This utility model relates to the field of electric actuator technology, and particularly to an electric actuator with automatic overload protection. It includes a valve body, a sliding hole bracket vertically fixed to one side of the valve body's outer wall, and a perforated plate horizontally fixed to the top of the valve stem at the upper part of the valve body. A positioning cylinder is vertically fixed to the top surface of the perforated plate. An electric actuator body is vertically mounted on the upper side of the valve body and slidably assembled on the sliding hole bracket. A rod cylinder is vertically mounted at the bottom of the output end of the electric actuator body and is fitted into the positioning cylinder for limiting. This utility model avoids the problem of impact force being converted into torque on the valve stem. Large torque transmitted to the electric actuator motor can easily damage the motor and affect its service life, thus improving the service life of the electric actuator motor.

Description

Technical Field

[0001] This utility model relates to the field of electric actuator technology, and in particular to an electric actuator with automatic overload protection function. Background Technology

[0002] An electric actuator is a device that converts electrical energy into mechanical motion. It is widely used in industrial automation, robotics, valve control and other fields. In the valve plate of a tilting valve, the electric actuator mainly acts as a driving component to drive the valve plate to tilt.

[0003] The existing announcement number is CN204083434U, named "An Electric Valve". It includes an upper cover, a lower cover, a bottom cover, a panel, and an antenna mounted on the panel. The upper and bottom covers are equipped with motor drivers, and the motor drivers have built-in integrated chips. The built-in integrated chips have large capacitors for storing energy. The bottom cover has a valve body. In the event of a sudden power failure, the large capacitor can supply power to the drive board on the built-in integrated chip, giving the drive board enough energy to automatically open the valve body. The electric valve is installed in a pipe well and is mainly used to control the opening or closing of the valve. The electric valve has the function of automatically opening the valve when the power is off, and also has a manual valve opening function. In the event of a system failure, the electric valve can be manually opened without affecting normal heating.

[0004] However, when the flow rate and pressure of the above-mentioned electric valve are too high during use, the impact on the valve plate is large. The impact force is converted into torque on the valve stem. The large torque is transmitted to the motor of the electric actuator, which can easily cause damage to the motor and affect its service life. Utility Model Content

[0005] This invention solves the problems in related technologies and proposes an electric actuator with automatic overload protection function.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: an electric actuator with overload automatic protection function, including a valve body, a sliding hole frame vertically fixed on one side of the outer wall of the valve body, a perforated plate horizontally fixed at the top of the valve stem of the valve body, a positioning cylinder vertically fixed on the top surface of the perforated plate, an electric actuator body vertically arranged on the upper side of the valve body, the electric actuator body vertically slidingly assembled on the sliding hole frame, a rod cylinder vertically arranged at the bottom of the output end of the electric actuator body, and the rod cylinder being limited and inserted into the positioning cylinder.

[0007] As a preferred embodiment, a rotating frame is horizontally fixed on the bottom surface of the output end of the electric actuator body, and a rotating ring is horizontally fitted on the outside of the rotating frame, and the rotating frame and the rotating ring are rotatably connected by a bearing.

[0008] As a preferred embodiment, a connecting column is vertically fixed on the top surface of the insertion tube, and the top of the connecting column of the insertion tube is fixed on the bottom surface of the rotating frame.

[0009] As a preferred embodiment, multiple connecting rods are evenly and vertically fixed on the bottom surface of the swivel, and the bottom ends of the multiple connecting rods are horizontally fixed with insert rings.

[0010] As a preferred embodiment, the insert ring is sleeved on the valve stem, and multiple inserts are vertically fixed on the top surface of the insert ring, with the multiple inserts on the insert ring being inserted into the orifice plate.

[0011] As a preferred embodiment, an electric telescopic rod is vertically fixed to the upper part of the valve body, and the output end of the electric telescopic rod is fixed to the bottom surface of the insert ring.

[0012] As a preferred embodiment, a guide rod is vertically fixed on the top surface of the electric actuator body, and the guide rod slides vertically through the top surface of the sliding hole frame.

[0013] As a preferred option, a pressure sensor is fixed inside the valve body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: During use, a pressure sensor detects the pressure inside the valve body. When the pressure is high, the fluid impacts the valve plate, causing the valve stem to rotate and generating a large torque on the valve stem. To protect the motor in the electric actuator body, the electric telescopic rod is activated to extend, pushing the electric actuator body vertically upward on the sliding frame. The upward sliding electric actuator body drives the insertion cylinder at the output end to be pulled out from the positioning insertion cylinder at the top of the valve stem of the valve body. At this time, the output end of the electric actuator body is no longer connected to the valve stem of the valve body, and the torque of the valve stem is no longer transmitted to the motor of the electric actuator body. This avoids the problem of impact force being converted into torque on the valve stem. A large torque transmitted to the electric actuator motor can easily cause motor damage and affect the service life of the motor, thus improving the service life of the electric actuator motor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the valve body in its disassembled state in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the insert ring in the disassembled state in an embodiment of this utility model;

[0019] Figure 5This is a schematic diagram of the electric actuator body in an exploded state in an embodiment of this utility model.

[0020] In the diagram: 1. Valve body; 11. Orifice plate; 12. Positioning cylinder; 13. Electric telescopic rod; 14. Pressure sensor; 2. Sliding hole frame; 3. Electric actuator body; 31. Guide rod; 32. Rotary ring frame; 33. Insertion cylinder; 34. Rotary ring; 35. Connecting rod; 36. Insertion ring. Detailed Implementation

[0021] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0027] like Figures 1 to 5As shown, an electric actuator with overload automatic protection function includes a valve body 1. A sliding hole frame 2 is vertically fixed to one side of the outer wall of the valve body 1. An orifice plate 11 is horizontally fixed to the top of the valve stem at the upper part of the valve body 1. A positioning insert 12 is vertically fixed to the top surface of the orifice plate 11. An electric actuator body 3 is vertically arranged on the upper side of the valve body 1 and is vertically slidably assembled on the sliding hole frame 2. A rod cylinder 33 is vertically arranged at the bottom of the output end of the electric actuator body 3 and is limited and inserted into the positioning insert 12. A guide rod 31 is vertically fixed to the top surface of the electric actuator body 3 and is vertically slidably assembled through the top surface of the sliding hole frame 2. A pressure sensor 14 is fixed inside the valve body of the valve body 1. In use, the pressure sensor 14, model MS5837-30BA, is fixed to the inner wall of the valve body 1. The output terminal 14 is electrically connected to the processor input terminal, and then the processor output terminal is electrically connected to the electric telescopic rod 13. During use, the pressure sensor detects the pressure inside the valve body. When the pressure is high, the fluid impacts the valve plate, causing the valve stem to rotate and generating a large torque on the valve stem. In order to protect the motor in the electric actuator body 3, the electric telescopic rod 13 is activated to extend and push the electric actuator body 3 upward to slide vertically on the sliding hole frame 2. The upward sliding electric actuator body 3 drives the insertion cylinder 33 at the output end to be pulled out from the positioning insertion cylinder 12 at the top of the valve stem of the valve body 1. At this time, the output end of the electric actuator body 3 is no longer connected to the valve stem of the valve body 1, and the torque of the valve stem is no longer transmitted to the motor of the electric actuator body 3. This avoids the problem of the impact force being converted into torque on the valve stem. A large torque transmitted to the electric actuator motor can easily cause motor damage and affect the service life of the motor, thus improving the service life of the electric actuator motor.

[0028] In one embodiment, such as Figure 4 and 5As shown, a rotating frame 32 is horizontally fixed on the bottom surface of the output end of the electric actuator body 3, and a rotating ring 34 is horizontally sleeved on the outside of the rotating frame 32. The rotating frame 32 and the rotating ring 34 are rotatably connected by a bearing. A connecting column is vertically fixed on the top surface of the insert rod cylinder 33, and the top of the connecting column of the insert rod cylinder 33 is fixed on the bottom surface of the rotating frame 32. Multiple connecting rods 35 are evenly and vertically fixed on the bottom surface of the rotating ring 34, and insert pin rings 36 are horizontally fixed at the bottom ends of the multiple connecting rods 35. The insert pin rings 36 are sleeved on the valve stem, and multiple insert pins are vertically fixed on the top surface of the insert pin rings 36. The multiple insert pins on the insert pin rings 36 are inserted into the orifice plate 11. An electric telescopic rod 13 is vertically fixed to the upper part of the valve body 1, and the output end of the electric telescopic rod 13 is fixed to the bottom surface of the insert ring 36. In order to prevent the output end of the electric actuator body 3 from moving away from the valve stem, which would cause the valve plate to rotate under the impact of fluid due to the lack of a limiting component, the rising electric actuator body 3 uses the connecting rod 35 to drive the insert ring 36 to move vertically upward on the valve stem. The multiple inserts on the moving insert ring 36 are inserted into the orifice plate 11 at the top of the valve stem. Thus, the insert ring 36 is limited and supported by the electric telescopic rod 13 to keep the valve stem stationary on the valve body 1, thereby preventing the output end of the electric actuator body 3 from moving away from the valve stem, which would cause the valve plate to rotate under the impact of fluid due to the lack of a limiting component.

[0029] In this embodiment, a pressure sensor is used to detect the pressure inside the valve body. When the pressure is high, the fluid impacts the valve plate, causing the valve stem to rotate and generating a large torque on the valve stem. To protect the motor in the electric actuator body 3, the electric telescopic rod 13 is activated to extend and push the electric actuator body 3 upward to slide vertically on the sliding hole frame 2. The upward sliding electric actuator body 3 drives the insertion cylinder 33 at the output end to be pulled out from the positioning insertion cylinder 12 at the top of the valve stem of the valve body 1. At this time, the output end of the electric actuator body 3 is no longer connected to the valve stem of the valve body 1, and the torque of the valve stem is no longer transmitted to the motor of the electric actuator body 3. The rising electric actuator body 3 uses the connecting rod 35 to drive the insertion ring 36 to move vertically upward on the valve stem. Multiple insertions on the upward-moving insertion ring 36 are inserted into the hole plate 11 at the top of the valve stem. Thus, the insertion ring 36 is limited and supported by the electric telescopic rod 13 to keep the valve stem stationary on the valve body 1.

[0030] The above are preferred embodiments of this utility model. Those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above. Any obvious improvements, substitutions or modifications made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. An electric actuator with automatic overload protection function, characterized in that, The valve body (1) includes a valve body (1), on one side of the outer wall of the valve body (1) a sliding hole frame (2) is vertically fixed, and the valve stem top of the upper part of the valve body (1) is horizontally fixed with a hole plate (11), and a positioning insert (12) is vertically fixed on the top surface of the hole plate (11). An electric actuator body (3) is vertically arranged on the upper side of the valve body (1), and the electric actuator body (3) is vertically slidably assembled on the sliding hole frame (2). A rod cylinder (33) is vertically arranged at the bottom of the output end of the electric actuator body (3), and the rod cylinder (33) is limited and inserted into the positioning insert (12).

2. An electric actuator with automatic overload protection function according to claim 1, characterized in that: A rotating frame (32) is horizontally fixed on the bottom surface of the output end of the electric actuator body (3), and a rotating ring (34) is horizontally sleeved on the outside of the rotating frame (32), and the rotating frame (32) and the rotating ring (34) are rotatably connected by bearings.

3. An electric actuator with automatic overload protection function according to claim 2, characterized in that: A connecting column is vertically fixed on the top surface of the insertion tube (33), and the top of the connecting column of the insertion tube (33) is fixed on the bottom surface of the rotating frame (32).

4. An electric actuator with automatic overload protection function according to claim 2, characterized in that: Multiple connecting rods (35) are evenly and vertically fixed on the bottom surface of the rotating ring (34), and the bottom ends of the multiple connecting rods (35) are horizontally fixed with insert rings (36).

5. An electric actuator with automatic overload protection function according to claim 4, characterized in that: The insert ring (36) is sleeved on the valve stem, and multiple inserts are vertically fixed on the top surface of the insert ring (36), and the multiple inserts on the insert ring (36) are inserted into the orifice plate (11).

6. An electric actuator with automatic overload protection function according to claim 5, characterized in that: The valve body (1) has an electric telescopic rod (13) vertically fixed on the upper part of the valve body, and the output end of the electric telescopic rod (13) is fixed on the bottom surface of the insert ring (36).

7. An electric actuator with automatic overload protection function according to claim 1, characterized in that: A guide rod (31) is vertically fixed on the top surface of the electric actuator body (3), and the guide rod (31) slides vertically through the top surface of the sliding hole frame (2).

8. An electric actuator with automatic overload protection function according to claim 1, characterized in that: A pressure sensor (14) is fixed inside the valve body (1).

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