An electric valve actuator

Abstract

The utility model discloses an electric valve actuator, including valve body, valve stem, actuator, output shaft and handle etc, mainly is detachable rotating sleeve between output shaft and valve stem is equipped to transmit the torque, and actuator is installed in the valve body top through detachable locating plate axial positioning, and then is equipped with single connecting screw in the handle, is used for fixed in valve stem top end after coaxial through -connection handle, output shaft, rotating sleeve and locating plate, then only need to realize the quick dismounting of actuator and valve body through the screwing / loosening of this connecting screw, for example, only need to directly separate actuator and valve body after the connecting screw is loosened and removed, thereby neither will be subjected to the dismounting space limit, also avoid the trouble of synchronously removing valve body from the pipeline system, improve the dismounting maintenance efficiency, and rotating sleeve and locating plate are modular components, and through replacing the rotating sleeve of different inner diameter and the locating plate of matching size, can adapt to different specifications valves, and the application range is wider, also reduces the inventory cost of spare parts.

Description

Technical Field

[0001] This utility model relates to an electric valve actuator in the field of fluid control technology, specifically an electric valve actuator with quick assembly and disassembly and modular adaptability. Background Technology

[0002] The traditional structure of an electric valve actuator mainly includes a valve body, a valve stem inside the valve body, and an actuator mounted on top of the valve body. This actuator contains an output shaft, which is typically coaxially connected to the valve stem via a rigid coupling or direct insertion to achieve torque transmission and valve opening / closing control. The actuator and valve body are then secured by multiple circumferentially distributed fastening screws, typically ≥4 screws. This structure has two major technical drawbacks: First, it is inefficient for disassembly and maintenance. All fastening screws must be removed sequentially during actuator assembly and disassembly. Furthermore, removing the circumferentially distributed fastening screws is often limited by space constraints, sometimes requiring simultaneous removal of the valve body from the piping system to free up space, increasing maintenance time and making repair and replacement operations more cumbersome. Second, it has poor structural adaptability. The connection structure between the output shaft and valve stem is a one-to-one proprietary design. For example, a square hole of a specific size at the end of the output shaft only matches a specific valve stem cross-section, and cannot accommodate the interface sizes of different valve specifications. This necessitates users configuring dedicated actuators for each type of valve, increasing spare parts inventory costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an electric valve actuator with quick disassembly and modular adaptation.

[0004] The technical problem of this utility model is solved by the following technical solution:

[0005] An electric valve actuator includes a valve body, a valve stem inside the valve body, and an actuator on top of the valve body. The actuator has an output shaft inside and a handle on top. Torque is transmitted between the output shaft and the valve stem via a detachable rotating sleeve. The actuator is axially positioned on top of the valve body via a detachable positioning plate. A connecting screw is provided inside the handle, which coaxially passes through the handle, the output shaft, the rotating sleeve, and the positioning plate and is fixed to the top of the valve stem. The actuator can be quickly disassembled and assembled from the valve body by tightening / loosening the connecting screw.

[0006] The rotating sleeve and the positioning plate are replaceable modular components, and different specifications of valves can be adapted by replacing rotating sleeves with different inner diameters and positioning plates with matching sizes.

[0007] The upper end of the rotating sleeve is connected to the lower end of the output shaft via a spline connection, and the lower end of the rotating sleeve is provided with a polygonal hole that matches the polygonal cross-section of the top of the valve stem.

[0008] The positioning plate is provided with at least two circumferentially symmetrically distributed positioning pin holes, and the top of the valve body is provided with a corresponding positioning pin shaft. The circumferential positioning of the positioning plate is achieved through the cooperation of the positioning pin holes and the positioning pin shaft.

[0009] The connecting screw is a single fastener. After loosening and removing the connecting screw, the actuator and valve body can be directly separated.

[0010] The handle is connected to the upper end of the output shaft via a spline connection.

[0011] Compared with existing technologies, this utility model mainly uses a detachable rotating sleeve between the output shaft and the valve stem to transmit torque. The actuator is axially positioned on the top of the valve body via a detachable positioning plate. A connecting screw is provided inside the handle, and this connecting screw coaxially passes through the handle, output shaft, rotating sleeve, and positioning plate before being fixed to the top of the valve stem. Thus, the actuator and valve body can be quickly disassembled and assembled simply by tightening / loosening this connecting screw. Obviously, since the connecting screw is a single fastener, in actual operation, only the connecting screw needs to be loosened and removed to directly separate the actuator and valve body, avoiding the trouble of sequentially disassembling and assembling all the circumferentially distributed fasteners in the traditional structure. In particular, the connecting screw can be removed directly from the top of the actuator without being restricted by the disassembly space, and it also avoids the trouble of simultaneously removing the valve body from the pipeline system, thereby improving the efficiency of disassembly, assembly, and maintenance. Furthermore, the rotating sleeve and positioning plate are replaceable modular components, so by replacing the rotating sleeve with a different inner diameter and the positioning plate with a matching size, different specifications of valves can be adapted, resulting in a wider range of applications and greatly reducing the inventory cost of spare parts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model (the actuator is not shown in cross-section).

[0013] Figure 2 This is a cross-sectional view of the actuator.

[0014] Figure 3 This is a cross-sectional view of the positioning plate. Detailed Implementation

[0015] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0016] like Figures 1-3 As shown, 1. Valve body, 11. Valve stem, 12. Positioning pin, 2. Actuator, 21. Output shaft, 3. Handle, 4. Rotating sleeve, 5. Positioning plate, 51. Positioning pin hole, 6. Connecting screw. The same labels in each figure represent the same parts.

[0017] An electric valve actuator, such as Figure 1 , Figure 2As shown, a valve that can be remotely and electrically controlled to open and close via an actuator is disclosed. The valve can be a ball valve, gate valve, butterfly valve, or other pipeline valves. In this embodiment, a ball valve is used as an example. Its structure includes a valve body 1 and a valve stem 11 inside the valve body. An actuator 2 is installed on the top of the valve body. An output shaft 21 is provided inside the actuator 2, and a handle 3 is provided on the top of the actuator 2.

[0018] The handle 3 and the output shaft 21 are connected by a spline for transmission, i.e. Figure 2 As shown, the bottom of the handle 3 is matched with the spline shaft at the upper end of the output shaft 21 through the spline hole to form a transmission. Therefore, in actual use, the output shaft 21 can be electrically driven to rotate by the actuator 2, or the output shaft 21 can be temporarily manually driven to rotate by the handle 3 in special circumstances.

[0019] The output shaft 21 and valve stem 11 transmit torque through a detachable rotating sleeve 4. Specifically, the upper end of the rotating sleeve 4 is connected to the lower end of the output shaft 21 via a spline joint. Figure 2 As shown, the upper end of the rotating sleeve is matched with the spline hole at the lower end of the output shaft via a splined shaft to form a transmission, while the lower end of the rotating sleeve has a polygonal hole that matches the polygonal cross-section of the valve stem tip, i.e. Figure 2 As shown, the lower end of the rotating sleeve is matched with the square shaft at the top of the valve stem through the square hole to form a transmission. Therefore, the rotation of the output shaft 21 can drive the valve stem 11 to rotate synchronously through the rotating sleeve 4, thereby realizing the opening and closing of the valve.

[0020] The actuator 2 is axially positioned on the top of the valve body 1 via a detachable positioning plate 5. Specifically, the positioning plate 5 is fixed to the bottom of the actuator 2, and the positioning plate 5 is provided with... Figure 3 As shown, there are at least two circumferentially symmetrically distributed positioning pin holes 51. Correspondingly, a mounting flange is provided on the top of the valve body 1, and a positioning pin shaft 12 is provided on the mounting flange that corresponds one-to-one with the number and position of the positioning pin holes 51. Therefore, the circumferential positioning of the positioning plate 5 can be achieved by the cooperation of the positioning pin holes 51 and the positioning pin shaft 12, which means that the displacement of the actuator 2 after it is installed on the top of the valve body 1 is restricted.

[0021] Then, the handle 3 is provided with a connecting screw 6, for example in this embodiment. Figure 2 The image shows a single round-headed screw. This connecting screw coaxially passes through the connecting handle 3, output shaft 21, rotating sleeve 4, and positioning plate 5, and is fixed to the top of valve stem 11, thus connecting these components into one unit. Therefore, the actuator 2 and valve body 1 can be quickly disassembled and assembled simply by tightening / loosening this connecting screw 6. In particular, since this connecting screw 6 is a single fastener, in actual operation, the actuator 2 and valve body 1 can be directly separated simply by loosening and removing the connecting screw 6, thereby avoiding the trouble of sequentially disassembling and assembling all the circumferentially distributed fasteners in the traditional structure.

[0022] Meanwhile, the connecting screw 6 can be directly removed from the top of the actuator 2 without being restricted by the disassembly space. Therefore, it avoids the trouble of simultaneously removing the valve body 1 from the pipeline system, realizing rapid maintenance without pipeline disassembly, thereby greatly improving the efficiency of disassembly and maintenance.

[0023] Therefore, through the connection structure of the connecting screw 6, the rotating sleeve 4 and the positioning plate 5 can be designed as replaceable modular components. That is, by replacing the rotating sleeve 4 with different inner diameters and the positioning plate 5 with matching sizes, different specifications of valves can be adapted, making the application range wider and the versatility stronger, thereby greatly reducing the inventory cost of spare parts.

[0024] The basic principles and main features of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. 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 utility model as claimed. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An electric valve actuator, comprising a valve body (1), a valve stem (11) within the valve body, and an actuator (2) at the top of the valve body, wherein the actuator has an output shaft (21) and a handle (3) at the top of the actuator, characterized in that, Torque is transmitted between the output shaft (21) and the valve stem (11) via a detachable rotating sleeve (4); The actuator (2) is axially positioned on the top of the valve body (1) via a detachable positioning plate (5); The handle (3) is provided with a connecting screw (6), which coaxially passes through the handle (3), output shaft (21), rotating sleeve (4) and positioning plate (5) and is fixed to the top of valve stem (11). By tightening / loosening the connecting screw (6), the actuator (2) and valve body (1) can be quickly disassembled and assembled.

2. The electric valve actuator according to claim 1, characterized in that, The rotating sleeve (4) and the positioning plate (5) are replaceable modular components, and different specifications of valves can be adapted by replacing the rotating sleeve (4) with different inner diameters and the positioning plate (5) with matching size.

3. An electric valve actuator according to claim 1, characterized in that, The upper end of the rotating sleeve (4) is connected to the lower end of the output shaft (21) by a spline connection. The lower end of the rotating sleeve (4) is provided with a polygonal hole that matches the polygonal cross section of the top of the valve stem (11).

4. An electric valve actuator according to claim 1, characterized in that, The positioning plate (5) is provided with at least two circumferentially symmetrically distributed positioning pin holes (51), and the valve body (1) is provided with a corresponding positioning pin shaft (12) at the top. The circumferential positioning of the positioning plate (5) is achieved through the cooperation of the positioning pin holes (51) and the positioning pin shaft (12).

5. An electric valve actuator according to claim 1, characterized in that, The connecting screw (6) is a single fastener. After the connecting screw is loosened and removed, the actuator (2) and the valve body (1) are directly separated.

6. An electric valve actuator according to claim 1, characterized in that, The handle (3) and the upper end of the output shaft (21) are connected by a spline for transmission.

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