An electric actuator for valves

Abstract

The utility model discloses a valve electric actuator, including the casing, the one side fixedly connected with motor of casing, the output shaft fixedly connected with worm of motor, the worm transmission is connected with the worm wheel ring of worm gear reducer, the first gear ring of worm gear reducer is engaged with the second gear ring of first double gear, the third gear ring of first double gear is engaged with the fourth gear ring of second double gear, the fifth gear ring of second double gear is engaged with transmission gear, transmission gear is fixedly connected with the rotating shaft, the bottom end of rotating shaft penetrates casing and is fixedly connected with the cross slide block coupling of valve stem coupling. The utility model discloses through multistage reduction transmission to drive the rotating shaft fixed with transmission gear to lower speed and great torque output, through the cross slide block coupling of rotating shaft bottom end and give valve stem to realize the opening or close control of valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an electric actuator for valves. Background Technology

[0002] The core function of valves in industrial piping systems is to precisely control the flow and interruption of fluids, and the precise control of valve opening is key to achieving this function. The valve opening, i.e., the displacement or rotation angle of the valve disc relative to the valve seat, directly determines the cross-sectional area of ​​the flow channel, thus affecting key process parameters such as flow rate and pressure. Traditional electric actuators mostly use mechanical limit switches, which typically can only detect two extreme positions: fully open and fully closed. This makes it difficult to achieve fine adjustment of the intermediate opening while simultaneously meeting the requirement of high-torque shut-off, thus hindering precise flow regulation.

[0003] Based on the above, this utility model proposes an electric actuator for valves, which can effectively solve the above problems. Utility Model Content

[0004] This utility model addresses the shortcomings of the existing technology by providing an electric actuator for valves.

[0005] This utility model is achieved through the following technical solution: An electric actuator for a valve includes a housing. A motor is fixedly connected to one side of the housing. A worm gear is fixedly connected to the output shaft of the motor. The worm gear is driven by the worm wheel ring of a worm gear reducer. The first gear ring of the worm gear reducer meshes with the second gear ring of a first double gear. The third gear ring of the first double gear meshes with the fourth gear ring of a second double gear. The fifth gear ring of the second double gear meshes with a transmission gear. The transmission gear is fixedly connected to a rotating shaft. The bottom end of the rotating shaft passes through the housing and is fixedly connected to a cross-slider coupling that connects to the valve stem. An opening monitoring mechanism is provided at the top of the rotating shaft.

[0006] According to the above technical solution, as a further preferred technical solution, the opening monitoring mechanism includes a positioning cover fixedly connected to the housing, a position signal disk is provided on the top of the positioning cover, the position signal disk is fixedly connected to the top of the first rotating shaft by bolts, and a plurality of signal point slots are opened on the outer periphery of the position signal disk; an infrared sensor is fixedly connected to one side of the positioning cover, and the emitting end of the infrared sensor faces the outer periphery of the position signal disk.

[0007] According to the above technical solution, as a further preferred technical solution, the worm gear reducer and the second double gear are both rotatably connected to the first fixed shaft through connecting bearings, and the upper and lower ends of the first fixed shaft are respectively fixedly connected to the housing.

[0008] According to the above technical solution, as a further preferred technical solution, the first double gear is rotatably connected to the second fixed shaft through a connecting bearing, and the upper and lower ends of the second fixed shaft are respectively fixedly connected to the housing.

[0009] According to the above technical solution, as a further preferred technical solution, the two ends of the worm are respectively rotatably connected to rotating seats, and the rotating seats are fixedly connected to the housing.

[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects: This utility model provides an electric actuator for valves, which achieves multi-stage reduction transmission through the mutual cooperation of a motor, worm gear, worm gear reducer, first double gear, second double gear and transmission gear. This drives a rotating shaft fixed to the transmission gear to output a large torque at a low speed. The torque is transmitted to the valve stem through a cross-slider coupling at the bottom of the rotating shaft, thereby realizing the opening or closing control of the valve.

[0011] By setting a position signal disk, which rotates synchronously with the rotating shaft, the multiple signal point slots on the disk periodically turn the signals emitted by the infrared sensor on and off during rotation. By counting these on and off pulses, the control system can accurately calculate the number of rotations and angle of the rotating shaft, thereby determining the valve opening degree in real time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the overall internal structure of this utility model. Detailed Implementation

[0013] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0014] An electric actuator for a valve includes a housing 1. A motor 2 is fixedly connected to one side of the housing 1. A worm gear 3 is fixedly connected to the output shaft of the motor 2. The worm gear 3 is driven by the worm wheel ring 41 of a worm gear reducer 4. The first gear ring 42 of the worm gear reducer 4 meshes with the second gear ring 51 of a first double gear 5. The third gear ring 52 of the first double gear 5 meshes with the fourth gear ring 61 of a second double gear 6. The fifth gear ring 62 of the second double gear 6 meshes with a transmission gear 7. The transmission gear 7 is fixedly connected to a rotating shaft 8. The bottom end of the rotating shaft 8 passes through the housing 1 and is fixedly connected to a cross-slider coupling 9 that is connected to the valve stem. An opening monitoring mechanism is provided at the top of the rotating shaft.

[0015] This invention achieves multi-stage speed reduction transmission through the coordinated action of motor 2, worm gear 3, worm gear reducer 4, first double gear 5, second double gear 6, and transmission gear 7. This drives the rotating shaft 8, which is fixed to the transmission gear 7, to output a large torque at a low speed. The torque is then transmitted to the valve stem through the cross-slider coupling 9 at the bottom of the rotating shaft 8, thereby controlling the opening or closing of the valve.

[0016] Furthermore, in another embodiment, the opening monitoring mechanism includes a positioning cover 10 fixedly connected to the housing 1. A position signal disk 11 is provided on the top of the positioning cover 10. The position signal disk 11 is fixedly connected to the top end of the first rotating shaft 8 by bolts. A plurality of signal point slots 111 are opened on the outer periphery of the position signal disk 11. An infrared sensor 12 is fixedly connected to one side of the positioning cover 10. The emitting end of the infrared sensor 12 faces the outer periphery of the position signal disk 11.

[0017] By setting up an opening monitoring mechanism, the position signal disk 11 of the opening monitoring mechanism rotates synchronously with the rotating shaft 8. The multiple signal point slots 111 on it will periodically turn on and off the signals emitted by the infrared sensor 12 when rotating. By counting these on and off pulses, the control system can accurately calculate the number of rotations and angles of the rotating shaft 8, thereby determining the opening degree of the valve in real time.

[0018] Furthermore, in another embodiment, the worm gear reducer 4 and the second double gear 6 are both rotatably connected to the first fixed shaft 13 via connecting bearings, and the upper and lower ends of the first fixed shaft 13 are respectively fixedly connected to the housing 1.

[0019] Furthermore, in another embodiment, the first double gear 5 is rotatably connected to the second fixed shaft 14 via a connecting bearing, and the upper and lower ends of the second fixed shaft 14 are respectively fixedly connected to the housing 1.

[0020] Furthermore, in another embodiment, the two ends of the worm gear 3 are respectively rotatably connected to rotating seats 15, and the rotating seats 15 are fixedly connected to the housing 1.

[0021] Based on the description and accompanying drawings of this utility model, those skilled in the art can easily manufacture or use an electric actuator for valves according to this utility model, and can produce the positive effects described in this utility model.

[0022] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0023] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An electric actuator for valves, characterized in that: The device includes a housing (1), a motor (2) fixedly connected to one side of the housing (1), a worm (3) fixedly connected to the output shaft of the motor (2), the worm (3) being driven by the worm wheel ring (41) of the worm gear reducer (4), the first gear ring (42) of the worm gear reducer (4) meshing with the second gear ring (51) of the first double gear (5), the third gear ring (52) of the first double gear (5) meshing with the fourth gear ring (61) of the second double gear (6), and the fifth gear ring (62) of the second double gear (6) meshing with the transmission gear (7); the transmission gear (7) is fixedly connected to a rotating shaft (8), the bottom end of the rotating shaft (8) passing through the housing (1) and fixedly connected to a cross-slider coupling (9) connected to the valve stem; and an opening monitoring mechanism is provided on the top of the rotating shaft (8).

2. The electric actuator for a valve according to claim 1, characterized in that: The opening monitoring mechanism includes a positioning cover (10) fixedly connected to the housing (1). A position signal disk (11) is provided on the top of the positioning cover (10). The position signal disk (11) is fixedly connected to the top of the first rotating shaft (8) by bolts. Multiple signal point slots (111) are opened on the outer periphery of the position signal disk (11). An infrared sensor (12) is fixedly connected to one side of the positioning cover (10). The emitting end of the infrared sensor (12) faces the outer periphery of the position signal disk (11).

3. The electric actuator for a valve according to claim 1, characterized in that: The worm gear reducer (4) and the second double gear (6) are rotatably connected to the first fixed shaft (13) through connecting bearings. The upper and lower ends of the first fixed shaft (13) are respectively fixedly connected to the housing (1).

4. The electric actuator for a valve according to claim 1, characterized in that: The first double gear (5) is rotatably connected to the second fixed shaft (14) through a connecting bearing, and the upper and lower ends of the second fixed shaft (14) are respectively fixedly connected to the housing (1).

5. The electric actuator for a valve according to claim 1, characterized in that: The two ends of the worm (3) are respectively rotatably connected to rotating seats (15), and the rotating seats (15) are fixedly connected to the housing (1).

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