Compact electric actuating mechanism for valve

Abstract

The utility model provides a compact electric actuating mechanism for a valve, which comprises a machine frame and an actuating assembly arranged on the machine frame, a manual assembly used for driving the actuating assembly to act is arranged on one side of the machine frame, and an electric assembly used for driving the actuating assembly to act is arranged on the other side of the machine frame. A manual and automatic switching assembly used for switching is arranged at the position, corresponding to the position between the manual assembly and the electric assembly, of the rack. The electric assembly comprises an end cover arranged on the rack and a driving motor arranged on the end cover; a protruding part is arranged on the side, facing the driving motor, of the middle of the end cover, an assembly hole matched with an output shaft of the driving motor is formed in the protruding part, and a driving gear is arranged at the end, penetrating through the assembly hole, of the output shaft of the driving motor. The compact electric actuating mechanism for the valve has the advantages of being compact in structure, high in reliability and easy to assemble and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a compact electric actuator for valves. Background Art

[0002] In the existing installation method of the electric input gear of the valve actuator, usually a single motor output shaft hole is opened on the end cover, and a bearing is installed in the hole to support the motor output shaft. The motor output shaft penetrates through the hole in cooperation with the bearing and extends into the frame of the valve actuator. Inside the frame, a support shaft and an electric input gear are additionally installed, and power is transmitted through the meshing of the gear at the end of the motor shaft and the electric input gear installed inside the frame. However, for the support shaft installed inside the frame, contours and shaft holes need to be set inside the frame, and additional support structures such as support shaft sleeves and bearings need to be installed. Although the installation structure of the input gear in this electric mode can achieve the effect of power transmission, it has certain limitations in practical applications. This is because additional structures need to be set inside the frame to install support structures such as shaft sleeves. On the one hand, the frame design becomes complex and the processing cost increases. On the other hand, additional support structures need to be installed, adding unnecessary parts, resulting in inconvenient assembly, use, and maintenance of the actuator. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a compact electric actuator for valves to solve the problem that additional structures need to be set inside the frame of the existing electric actuator to install support structures such as shaft sleeves, resulting in inconvenient assembly, use, and maintenance of the actuator.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A compact electric actuator for valves includes a frame and an actuator assembly arranged on the frame. A manual assembly for driving the actuator assembly to act is arranged on one side of the frame, and an electric assembly for driving the actuator assembly to act is arranged on the other side. A manual-automatic switching assembly for switching is arranged at the position corresponding to the manual assembly and the electric assembly on the frame.

[0006] The electric component includes an end cover disposed on the frame and a drive motor disposed on the end cover. A convex portion is provided on one side of the middle of the end cover facing the drive motor. An assembly hole for mating with the output shaft of the drive motor is provided on the convex portion. A driving gear is provided at one end of the output shaft of the drive motor passing through the assembly hole. The actuating mechanism includes a worm gear disposed on the frame and a worm meshing with the worm gear. Both the worm gear and the worm are rotatably mounted on the frame. A driven gear for mating with the driving gear is provided at one end of the worm facing the end cover. A first sealing ring is provided on one side of the end cover facing the drive motor, and a second sealing ring is provided on the other side. The first sealing ring is sleeved outside the convex portion, and the second sealing ring is sleeved outside the driving gear and the driven gear. An assembly groove for mating with the first sealing ring is provided on the housing of the drive motor. An installation groove for mating with the second sealing ring is provided on the frame.

[0007] Further, one end of the worm is rotatably mounted on the frame, and the other end is rotatably mounted on the end cover.

[0008] Further, a first bearing for mating with the worm is provided on the end cover, and a positioning groove for mounting the first bearing is provided at the position corresponding to the worm on the end cover.

[0009] Further, the convex portion is of a conical structure, and the small-diameter end of the convex portion faces the drive motor.

[0010] Further, a second bearing for mating with the output shaft of the drive motor is provided at the position corresponding to the assembly hole on the convex portion.

[0011] Further, a first sealing ring is provided at the connection between the first sealing ring and the drive motor, and a sealing groove for mounting the first sealing ring is provided on the side of the first sealing ring facing the outside of the drive motor.

[0012] Further, a second sealing ring is provided at the connection between the second sealing ring and the frame, and a limiting groove for mating with the second sealing ring is provided on the frame. The limiting groove communicates with the installation groove.

[0013] Further, a wire passing hole for communicating the housing of the drive motor and the frame is provided on the end cover. One end of the wire passing hole is disposed corresponding to the position between the first sealing ring and the convex portion, and the other end is disposed corresponding to the inner side of the second sealing ring.

[0014] Compared with the prior art, the compact electric actuator for a valve of the present utility model has the following advantages:

[0015] A compact electric actuator for a valve according to the present utility model has the advantages of compact structure, high reliability, easy assembly and use. By arranging an end cover between the frame and the driving motor and extending the length of the assembly hole by means of the convex part on the end cover, the assembly hole on the convex part is stably matched with the output shaft of the driving motor, so that the output shaft of the driving motor can be limited, ensuring that the driving motor can continuously and stably drive the driving gear to rotate. While simplifying the structure, the stability and reliability of the electric component during use are improved. In addition, by matching the first sealing ring with the assembly groove on the driving motor housing and using the second sealing ring to cooperate with the installation groove on the frame, convenient alignment and assembly of the driving motor, the end cover and the frame can be realized, the assembly difficulty of the three is reduced, and the sealing performance of the connection part of the three is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a compact electric actuator for a valve according to an embodiment of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the frame in a compact electric actuator for a valve according to an embodiment of the present utility model;

[0019] Figure 3 is a schematic structural diagram of one side of the convex part on the end cover in a compact electric actuator for a valve according to an embodiment of the present utility model;

[0020] Figure 4 is a schematic structural diagram of one side of the second sealing ring on the end cover in a compact electric actuator for a valve according to an embodiment of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the connection part between the end cover and the frame in a compact electric actuator for a valve according to an embodiment of the present utility model.

[0022] Explanation of the reference numerals:

[0023] 1. Frame; 2. Driving motor; 3. Manual-automatic switching component; 4. End cover; 5. Execution component; 6. Manual component; 7. Handwheel; 8. Rotating rod; 9. Worm; 10. Worm gear; 11. Manual gear; 12. Driven gear; 13. Connecting piece; 14. Poking rod; 15. Driving gear; 16. Output shaft; 17. First sealing ring; 18. Protruding part; 19. First sealing gasket; 20. Wire passing hole; 21. Second sealing ring; 22. Assembly hole; 23. Second bearing; 24. First bearing; 25. Positioning groove; 26. Second sealing gasket. Detailed implementation mode

[0024] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0027] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] A compact electric actuator for a valve, as Figures 1 to 5As shown in the figure, it includes a frame 1 and an execution component 5 arranged on the frame 1. A manual component 6 for driving the execution component 5 to act is provided on one side of the frame 1, and an electric component for driving the execution component 5 to act is provided on the other side. A manual-automatic switching component 3 for switching is provided on the frame 1 at a position corresponding to the manual component 6 and the electric component.

[0029] The above-mentioned electric component includes an end cover 4 arranged on the frame 1 and a driving motor 2 arranged on the end cover 4. A convex part 18 is provided on one side of the middle part of the end cover 4 facing the driving motor 2. An assembly hole 22 matched with the output shaft 16 of the driving motor 2 is provided on the convex part 18. A driving gear 15 is provided at one end of the output shaft 16 of the driving motor 2 passing through the assembly hole 22. The execution mechanism includes a worm gear 10 arranged on the frame 1 and a worm 9 matched with the worm gear 10. The worm gear 10 and the worm 9 are both rotatably installed on the frame 1. A driven gear 12 matched with the driving gear 15 is provided at one end of the worm 9 facing the end cover 4.

[0030] Exemplarily, the execution component 5, the manual component 6, and the manual-automatic switching component 3 can all adopt the corresponding structures used in the existing electric actuators for valves. The main improvement point of the present utility model lies in the re-design of the structure of the electric component, and does not involve the improvement of the manual component 6, the execution component 5, and the manual-automatic switching component 3.

[0031] For example, the manual component 6 can include a rotating rod 8 rotatably installed on the frame 1. A manual gear 11 is fixedly installed at one end of the rotating rod 8 extending into the housing, and a hand wheel 7 is fixedly installed at the other end to drive the rotating rod 8 to rotate. The manual-automatic switching component 3 can include a connecting piece 13 slidably installed on the worm 9 and a toggle rod 14 rotatably installed on the frame 1. The toggle rod 14 can be used to toggle the connecting piece 13 to slide along the worm 9. Correspondingly, two driven gears 12 corresponding to the driving gear 15 and the manual gear 11 are provided, and each driven gear 12 is rotatably installed on the worm 9. The connecting piece 13 realizes manual-automatic switching by cooperating with the two driven gears 12 respectively. Using the cooperation of the manual-automatic switching component 3, the execution component 5, the manual component 6, and the electric component to realize the action of the electric actuator belongs to the common technical means of those skilled in the art, so it will not be elaborated here.

[0032] A first sealing ring 17 is provided on one side of the above-mentioned end cover 4 facing the driving motor 2, and a second sealing ring 21 is provided on the other side. The first sealing ring 17 is sleeved outside the convex part 18, and the second sealing ring 21 is sleeved outside the driving gear 15 and the driven gear 12. An assembly groove matched with the first sealing ring 17 is provided on the housing of the driving motor 2, and an installation groove matched with the second sealing ring 21 is provided on the frame 1.

[0033] Exemplarily, both the first sealing ring 17 and the second sealing ring 21 are fixed on the end cover 4. By providing the first sealing ring 17 and the second sealing ring 21, not only can the end cover 4 be well structurally strengthened, but also the sealing performance at the connection between the end cover 4 and the housing of the drive motor 2, as well as between the end cover 4 and the frame 1, can be improved.

[0034] In the actual application process, the drive motor 2, the end cover 4, and the frame 1 can be fixedly connected by bolts, and bolt holes for installing bolts are provided on all of them. By using the first sealing ring 17 to cooperate with the assembly groove on the housing of the drive motor 2, and using the second sealing ring 21 to cooperate with the installation groove on the frame 1, convenient alignment and assembly of the drive motor 2, the end cover 4, and the frame 1 can be achieved, reducing the assembly difficulty of the three. At the same time, by providing a protrusion 18 on the end cover 4 and providing an assembly hole 22 on the protrusion 18, and extending the length of the assembly hole 22 by using the protrusion 18, so that the assembly hole 22 on the protrusion 18 stably cooperates with the output shaft 16 of the drive motor 2, the limit of the output shaft 16 of the drive motor 2 can be achieved, ensuring that the drive motor 2 can continuously and stably drive the driving gear 15 to rotate. Without affecting the stability of the output of the drive motor 2, the structure is simplified.

[0035] Optionally, one end of the worm 9 is rotatably installed on the frame 1, and the other end is rotatably installed on the end cover 4. Exemplarily, the end cover 4 is provided with a first bearing 24 that cooperates with the worm 9, and a positioning groove 25 for installing the first bearing 24 is provided at the position corresponding to the worm 9 on the end cover 4. Correspondingly, a bearing that cooperates with the worm 9 can also be installed on the frame 1 to achieve the stable rotation of the worm 9 on the frame 1. By rotatably installing the two ends of the worm 9 on the end cover 4 and the frame 1 respectively, the limit of the two ends of the worm 9 can be achieved, ensuring the stability of the worm 9 during rotation.

[0036] Optionally, the protrusion 18 is a conical structure, and the small-diameter end of the protrusion 18 faces the drive motor 2. By setting the protrusion 18 as a conical structure, while ensuring the structural strength of the protrusion 18, the space occupied by the protrusion 18 can be reduced, facilitating the installation and wiring of the drive motor 2.

[0037] Optionally, a second bearing 23 that cooperates with the output shaft 16 of the drive motor 2 is provided at the position corresponding to the assembly hole 22 on the protrusion 18. By installing the second bearing 23 at the assembly hole 22, the output shaft 16 can be rotatably installed on the protrusion 18, avoiding the wear of the output shaft 16 and being beneficial to further improving the stability of the rotation of the output shaft 16.

[0038] Optionally, a first sealing ring 19 is provided at the connection between the first sealing ring 17 and the drive motor 2. A sealing groove for installing the first sealing ring 19 is provided on the side of the first sealing ring 17 facing away from the drive motor 2. Exemplarily, the first sealing ring 19 can be an existing rubber sealing ring, and the first sealing ring 19 needs to have the same shape as the first sealing ring 17. By providing a sealing ring on the side of the first sealing ring 17 facing away from the drive motor 2, it is beneficial to improve the sealing performance at the connection between the drive motor 2 and the end cover 4.

[0039] Optionally, a second sealing ring 26 is provided at the connection between the second sealing ring 21 and the frame 1. A limiting groove for cooperating with the second sealing ring 26 is provided on the frame 1, and the limiting groove communicates with the installation groove. Exemplarily, the second sealing ring 26 can be an existing rubber sealing ring, and the second sealing ring 26 needs to have the same shape as the second sealing ring 21. By providing a sealing ring at the connection between the second sealing ring 21 and the frame 1, it is beneficial to improve the sealing performance at the connection between the end cover 4 and the frame 1.

[0040] Optionally, a wire passing hole 20 for communicating the housing of the drive motor 2 and the frame 1 is provided on the end cover 4. One end of the wire passing hole 20 is arranged corresponding to the position between the first sealing ring 17 and the protruding portion 18, and the other end is arranged corresponding to the inner side of the second sealing ring 21. By arranging the wire passing hole 20 inside the first sealing ring 17 and the second sealing ring 21, the sealing performance at the wire passing hole 20 can be ensured. The wire passing hole 20 can be used for threading the power supply wire or control wire of the drive motor 2 to realize the connection between the drive motor 2 and the controller on the frame 1. Using the controller to control the operation of the drive motor 2 is a commonly used technical means in the art, so it will not be elaborated here.

[0041] A compact electric actuator for a valve according to the present invention has the advantages of being structurally compact, highly reliable, and easy to assemble and use. By providing an end cover between the frame and the drive motor, and using the protruding portion on the end cover to extend the length of the assembly hole, so that the assembly hole on the protruding portion stably cooperates with the output shaft of the drive motor, the limit of the output shaft of the drive motor can be realized, ensuring that the drive motor can continuously and stably drive the driving gear to rotate. While simplifying the structure, the stability and reliability of the electric component during use are improved. In addition, by using the assembly groove on the first sealing ring and the drive motor housing in cooperation, and using the second sealing ring in cooperation with the installation groove on the frame, the convenient alignment and assembly of the drive motor, the end cover, and the frame can be realized, reducing the assembly difficulty of the three and improving the sealing performance at the connection of the three.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compact electric actuator for a valve, comprising a frame (1) and an actuator assembly (5) provided on the frame (1). A manual assembly (6) for driving the actuator assembly (5) to act is provided on one side of the frame (1), and an electric assembly for driving the actuator assembly (5) to act is provided on the other side. A manual-automatic switching assembly (3) for switching is provided on the frame (1) at a position corresponding to the manual assembly (6) and the electric assembly. It is characterized in that: The electric assembly includes an end cover (4) provided on the frame (1) and a drive motor (2) provided on the end cover (4); a convex portion (18) is provided on one side of the middle of the end cover (4) facing the drive motor (2), and an assembly hole (22) for cooperating with the output shaft (16) of the drive motor (2) is provided on the convex portion (18). A driving gear (15) is provided at one end of the output shaft (16) of the drive motor (2) passing through the assembly hole (22); the actuator includes a worm gear (10) provided on the frame (1) and a worm (9) cooperating with the worm gear (10). The worm gear (10) and the worm (9) are both rotatably mounted on the frame (1). A driven gear (12) for cooperating with the driving gear (15) is provided at one end of the worm (9) facing the end cover (4). A first sealing ring (17) is provided on one side of the end cover (4) facing the drive motor (2), and a second sealing ring (21) is provided on the other side. The first sealing ring (17) is sleeved outside the convex portion (18), and the second sealing ring (21) is sleeved outside the driving gear (15) and the driven gear (12). An assembly groove for cooperating with the first sealing ring (17) is provided on the housing of the drive motor (2), and an installation groove for cooperating with the second sealing ring (21) is provided on the frame (1).

2. The compact electric actuator for a valve according to claim 1, wherein: One end of the worm (9) is rotatably mounted on the frame (1), and the other end is rotatably mounted on the end cover (4).

3. A compact electric actuator for a valve according to claim 2, characterized in that: A first bearing (24) for cooperating with the worm (9) is provided on the end cover (4), and a positioning groove (25) for installing the first bearing (24) is provided on the end cover (4) corresponding to the position of the worm (9).

4. A compact electric actuator for a valve according to claim 1, characterized in that: The convex portion (18) is of a conical structure, and the small-diameter end of the convex portion (18) faces the drive motor (2).

5. A compact electric actuator for a valve according to claim 1 or 4, characterized in that: A second bearing (23) for cooperating with the output shaft (16) of the drive motor (2) is provided on the convex portion (18) corresponding to the assembly hole (22).

6. The compact electric actuator for a valve according to claim 1, wherein: A first sealing ring (19) is provided at the connection between the first sealing ring (17) and the drive motor (2), and a sealing groove for installing the first sealing ring (19) is provided on the side of the first sealing ring (17) facing outside the drive motor (2).

7. A compact electric actuator for a valve according to claim 1 or 6, characterized in that: A second sealing ring (26) is provided at the connection between the second sealing ring (21) and the frame (1), and a limiting groove for cooperating with the second sealing ring (26) is provided on the frame (1). The limiting groove communicates with the installation groove.

8. A compact electric actuator for a valve according to claim 1, characterized in that: A wire passing hole (20) for connecting the housing of the drive motor (2) and the frame (1) is provided on the end cover (4). One end of the wire passing hole (20) is arranged corresponding to the position between the first sealing ring (17) and the convex portion (18), and the other end is arranged corresponding to the inner side of the second sealing ring (21).

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