An electric actuator with valve opening degree adjusting function

Abstract

The utility model discloses a kind of electric actuators with valve opening degree regulating function, including ball valve body and actuator shell, actuator shell includes mutually connected lower shell and upper shell, nut buckle is rotatably installed on lower shell, ball valve body is locked and connected on nut buckle;Motor module is installed in lower shell, coaxial output shaft and motor angle rod are integrated on motor module, valve stem is integrated on ball valve body, connecting hole is set up on output shaft, valve stem is inserted into connecting hole and limit relative rotation;Circuit board is installed in upper shell, angle position sensor is integrated on circuit board, motor angle rod is inserted into angle position sensor;Two limit switches are installed on motor module, which are arranged at 90 degrees, touch column is installed on output shaft and rotates coaxially, when touch column is rotated by output shaft, it is used to touch limit switch;Intelligent improvement can be adapted to ball valve, and opening degree and disassembly state are detected.

Description

Technical Field

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

[0002] In northern Chinese cities, centralized heating is widespread. Heating companies install ball valves in the pipe shafts of apartment buildings to control the on / off of heating. Ball valves are divided into two types: mechanical and electric. Mechanical ball valves require manual operation using tools, while electric ball valves can be operated electrically. With the development of intelligent systems, electric ball valve devices not only need to support valve on / off control but also adjust the valve opening degree to achieve more precise and intelligent regulation. Furthermore, based on intelligent regulation, a disassembly detection function between the electric actuator and the ball valve body needs to be added to prevent abnormal heating situations. After adding the electric actuator, the overall size must be small, and it must be easy to integrate with existing ball valves for intelligent upgrades. Utility Model Content

[0003] The purpose of this utility model is to provide an electric actuator with valve opening adjustment function, which can be adapted to ball valves for intelligent improvement, and at the same time detect the opening degree and disassembly status.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An electric actuator with valve opening adjustment function includes a ball valve body and an actuator housing. The actuator housing includes a lower shell and an upper shell connected to each other. A nut is rotatably mounted on the lower shell, and the ball valve body is locked to the nut. A motor module is installed inside the lower shell. The motor module integrates a coaxial output shaft and a motor angle rod. A valve stem is integrated on the ball valve body. A connection hole is opened on the output shaft, and the valve stem is inserted into the connection hole and its relative rotation is restricted. A circuit board is installed inside the upper shell. An angle position sensor is integrated on the circuit board, and the motor angle rod is inserted into the angle position sensor. Two limit switches are installed on the motor module at a 90-degree angle. An actuating post that rotates coaxially with the output shaft is installed on the output shaft. When the actuating post is rotated by the output shaft, it is used to touch the limit switches.

[0005] Preferably, a connecting shaft is rotatably mounted on the lower housing, one end of the connecting shaft is inserted into the connecting hole, and the other end of the connecting shaft is connected to the valve stem.

[0006] Preferably, the connecting hole is provided with a parallel first anti-rotation plane, and the ends of both the connecting shaft and the output shaft are provided with a second anti-rotation plane that cooperates with the first anti-rotation plane.

[0007] Preferably, the lower shell has a plurality of connecting posts arranged circumferentially along the inner wall, the circuit board is placed on the connecting posts, and the upper shell has fastening holes coaxial with the connecting posts, and fasteners pass through the fastening holes and are locked on the connecting posts.

[0008] Preferably, a sealing groove is provided at the opening edge of the lower shell, a sealing edge is provided on the upper shell to be inserted into the sealing groove, and a sealing ring is provided in the sealing groove.

[0009] Preferably, the circuit board integrates buttons and multiple indicator lights, both of which are exposed on the upper housing.

[0010] Preferably, the lower shell has a through hole for threading power cables that connect the internal motor module and the circuit board.

[0011] Preferably, the wire hole is provided with a sealing sleeve for sealing the power supply cable.

[0012] Preferably, the circuit board also integrates a power module, a main control module, a 4G remote transmission module, a motor drive module, a motor feedback detection module, and a storage module.

[0013] Beneficial effects:

[0014] By integrating a nut on the lower housing to match the mounting part on the ball valve, the entire electric actuator is installed on the ball valve body. The motor module installed in the lower housing is connected to the valve stem via the output shaft. When the motor module drives the output shaft to rotate, it adjusts the rotation of the valve stem, thereby adjusting the valve opening. Current needs to flow in the motor module's driving state. By detecting the current flowing into the motor module through the circuit board, it can be determined whether it is currently connected to the valve stem to adjust the opening. Thus, it is possible to detect whether the electric actuator has been disassembled based on the current change, thereby realizing disassembly status detection. Meanwhile, an angle position sensor is integrated on the circuit board, and the motor angle rod, which rotates coaxially with the output shaft, further collects the rotation angle of the motor module driving the output shaft, so as to facilitate the signal feedback of the current valve opening. Furthermore, limit switches arranged at 90 degrees are integrated into the motor module to engage with the trigger post, detecting when the output shaft rotates to 0 degrees and 90 degrees to prevent overload rotation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the electric actuator according to an embodiment of the present utility model; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure; Figure 4 This is a schematic diagram of the internal structure of the electric actuator in the first embodiment of this utility model. Figure 5 This is a first-view structural diagram of the internal structure of the electric actuator in a second embodiment of the present utility model. Figure 6 This is a second-view structural diagram of the internal structure of the electric actuator in a second embodiment of the present utility model. Figure 7 This is a schematic diagram of the ball valve body in an embodiment of the present invention; Figure 8 This is a schematic diagram of the upper shell structure in an embodiment of the present utility model; Figure 9 This is a schematic diagram of the lower shell structure in an embodiment of the present invention; exist Figures 1 to 9 In the diagram, the correspondence between component names or lines and the drawing numbers is as follows: Ball valve body 1, actuator housing 2, lower housing 21, upper housing 22, nut buckle 23, connecting post 24, fastening hole 25, sealing groove 26, sealing edge 27, wire hole 28, motor module 3, output shaft 4, connecting hole 40, motor angle rod 5, valve stem 6, circuit board 7, angle position sensor 8, limit switch 9, actuating post 10, connecting shaft 11, first anti-rotation plane 12, second anti-rotation plane 13, button 14, indicator light 15. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] See Figures 1-9 As shown in the embodiment of this utility model, an electric actuator with valve opening adjustment function is proposed, including a ball valve body 1 and an actuator housing 2. The ball valve body 1 is installed in the pipeline, or it can be an existing ball valve body 1. By improving the connection structure, it is adapted to be installed with the actuator housing 2. The actuator housing 2 is used to install and protect the internal components, and is also installed on the ball valve body 1. The overall size is small.

[0018] Specifically, the actuator housing 2 includes a lower housing 21 and an upper housing 22 connected to each other. A nut 23 is rotatably mounted on the lower housing 21, and the ball valve body 1 is locked to the nut 23. The lower housing 21 and the ball valve body 1 are locked together by the nut 23. The nut 23 has a certain degree of versatility and can be adapted to ball valve bodies 1 with the same thread specifications. Of course, existing ball valve bodies 1 can also be modified to adapt to the nut 23 connection. The improvement technology is simple.

[0019] Specifically, a motor module 3 is installed inside the lower housing 21. The motor module 3 includes a motor and a transmission mechanism, assembled into a complete module. The transmission mechanism can be a gear set, etc., and the motor module 3 can use a mature product. A coaxial output shaft 4 and a motor angle rod 5 are integrated on the motor module 3. The motor module 3 drives the output shaft 4 and the motor angle rod 5 to rotate synchronously. A valve stem 6 is integrated on the ball valve body 1. A connection hole 40 is provided on the output shaft 4. The valve stem 6 is inserted into the connection hole 40 and its relative rotation is restricted. After the valve stem 6 and the output shaft 4 are connected to prevent rotation through the connection hole 40, when the output shaft 4 is driven to rotate, it drives the valve stem 6 to rotate, thereby adjusting the opening degree of the ball valve body 1.

[0020] To detect the current opening degree and whether the electric actuator is disconnected from the ball valve body 1, a circuit board 7 is installed inside the upper housing 22. An angle position sensor 8 is integrated on the circuit board 7. The motor angle rod 5 is inserted into the angle position sensor 8, and the motor angle rod 5 rotates synchronously with the output shaft 4. The angle position sensor 8 provides opening signal feedback based on the rotation angle. The motor module 3 is powered and controlled through the circuit board 7. The motor module 3 requires input current during operation, and the input current changes significantly under load and idling conditions. Therefore, the current status can be used to detect the electric actuator when it is not disassembled. Existing technology can be used for the specific circuit control, and the function can be integrated into the circuit board 7. Therefore, the circuit board 7 also integrates a power module, a main control module, a 4G remote transmission module, a motor drive module, a motor feedback detection module, and a storage module. Mature existing technologies can be used for the specific circuit principles and control. This embodiment does not protect the specific circuit control, but mainly protects the device arrangement to ensure that the integrated devices meet the corresponding linkage detection requirements.

[0021] Meanwhile, two limit switches 9 are installed on the motor module 3 at a 90-degree angle, and an actuating post 10 is installed on the output shaft 4 that rotates coaxially with it. When the actuating post 10 is rotated by the output shaft 4, it touches the limit switches 9. Generally, when the valve stem 6 is rotated for adjustment, the maximum opening is 90 degrees and the minimum opening is 0 degrees. Therefore, overloading the valve stem 6 will cause damage. By setting two limit switches 9 at 0 degrees and 90 degrees respectively to detect the rotation angle of the output shaft 4, it is convenient to realize the corresponding control in time and avoid damage caused by excessive rotation of the valve stem 6.

[0022] In the above solution, the valve stem 6 extends directly into the lower housing 21 and connects to the output shaft 4. However, in other existing ball valve bodies 1, the valve stem 6 may not be long enough, so an extension connection is needed. Specifically, a connecting shaft 11 is rotatably installed on the lower housing 21. One end of the connecting shaft 11 is inserted into the connecting hole 40, and the other end of the connecting shaft 11 is connected to the valve stem 6. The output shaft 4 and the valve stem 6 are connected through the connecting shaft 11.

[0023] To ensure a non-rotating connection, the valve stem 6 and the output shaft 4 can rotate synchronously after being connected. A first non-rotating plane 12 is provided in the connection hole 40. The ends of the connection shaft 11 and the output shaft 4 are provided with a second non-rotating plane 13 that cooperates with the first non-rotating plane 12. The cooperation between the first non-rotating plane 12 and the second non-rotating plane 13 prevents them from rotating relative to each other.

[0024] Meanwhile, to facilitate the installation of the upper shell 22 and the circuit board 7, a plurality of connecting posts 24 are arranged circumferentially at intervals along the inner wall inside the lower shell 21. The circuit board 7 is placed on the connecting posts 24. The upper shell 22 has fastening holes 25 coaxial with the connecting posts 24. Fasteners pass through the fastening holes 25 and are locked onto the connecting posts 24. The circuit board 7 is positioned by the ends of the connecting posts 24. After the fasteners lock the upper shell 22 onto the lower shell 21, the circuit board 7 is also fastened, thereby forming internal protection.

[0025] A sealing groove 26 is provided at the opening edge of the lower shell 21, and a sealing edge 27 is provided on the upper shell 22 to be inserted into the sealing groove 26. A sealing ring is provided in the sealing groove 26. After the upper shell 22 and the lower shell 21 are locked, waterproof protection is achieved through the sealing ring.

[0026] Meanwhile, a button 14 and multiple indicator lights 15 are integrated on the circuit board 7. Both the button 14 and the indicator lights 15 are exposed on the upper shell 22, making it easy to control the circuit board 7 from the outside through the button 14, while the indicator lights 15 indicate the operating status of the actuator.

[0027] Specifically, a wire hole 28 is provided on the lower shell 21 for passing through the power supply cable connecting the internal motor module 3 and the circuit board 7. At the same time, a sealing sleeve is provided at the wire hole 28 to seal the power supply cable, ensuring the sealing and protection of the inside of the shell after the power supply cable passes through.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electric actuator with valve opening adjustment function, characterized in that: The device includes a ball valve body (1) and an actuator housing (2). The actuator housing (2) includes a lower housing (21) and an upper housing (22) connected to each other. A nut buckle (23) is rotatably mounted on the lower housing (21), and the ball valve body (1) is locked to the nut buckle (23). The lower shell (21) is equipped with a motor module (3), the motor module (3) is integrated with a coaxial output shaft (4) and a motor angle rod (5), the ball valve body (1) is integrated with a valve stem (6), the output shaft (4) is provided with a connection hole (40), the valve stem (6) is inserted into the connection hole (40) and the relative rotation is restricted; A circuit board (7) is installed inside the upper shell (22), and an angle position sensor (8) is integrated on the circuit board (7). The motor angle rod (5) is inserted into the angle position sensor (8). The motor module (3) is equipped with two limit switches (9) arranged at 90 degrees. The output shaft (4) is equipped with a trigger post (10) that rotates along the same axis. When the trigger post (10) is rotated by the output shaft (4), it is used to touch the limit switches (9).

2. An electric actuator with valve opening adjustment function according to claim 1, characterized in that: A connecting shaft (11) is rotatably mounted on the lower shell (21). One end of the connecting shaft (11) is inserted into the connecting hole (40), and the other end of the connecting shaft (11) is connected to the valve stem (6).

3. An electric actuator with valve opening adjustment function according to claim 2, characterized in that: The connecting hole (40) is provided with a parallel first anti-rotation plane (12), and the ends of the connecting shaft (11) and the output shaft (4) are provided with a second anti-rotation plane (13) that cooperates with the first anti-rotation plane (12).

4. An electric actuator with valve opening adjustment function according to claim 3, characterized in that: The lower shell (21) is provided with a plurality of connecting posts (24) arranged circumferentially along the inner wall. The circuit board (7) is placed on the connecting posts (24). The upper shell (22) is provided with fastening holes (25) coaxial with the connecting posts (24). Fasteners pass through the fastening holes (25) and are locked on the connecting posts (24).

5. An electric actuator with valve opening adjustment function according to claim 4, characterized in that: A sealing groove (26) is provided at the opening edge of the lower shell (21), and a sealing edge (27) is provided on the upper shell (22) for inserting into the sealing groove (26). A sealing ring is provided in the sealing groove (26).

6. An electric actuator with valve opening adjustment function according to claim 5, characterized in that: The circuit board (7) integrates a button (14) and multiple indicator lights (15), both of which are exposed on the upper shell (22).

7. An electric actuator with valve opening adjustment function according to claim 6, characterized in that: The lower shell (21) has a wire hole (28) for threading power cables that connect the internal motor module (3) and the circuit board (7).

8. An electric actuator with valve opening adjustment function according to claim 7, characterized in that: A sealing sleeve for sealing the power supply cable is provided at the wire hole (28).

9. An electric actuator with valve opening adjustment function according to claim 8, characterized in that: The circuit board (7) also integrates a power module, a main control module, a 4G remote transmission module, a motor drive module, a motor feedback detection module, and a storage module.

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