Actuating mechanism of temperature control valve

Abstract

The utility model discloses a temperature control valve actuating mechanism, which relates to the technical field of valve actuating mechanisms, and comprises a mounting shell, an electric driving mechanism is mounted on the surface of the mounting shell, the electric driving mechanism comprises a speed reducing motor, and the output end of the speed reducing motor is fixedly connected with a worm. According to the utility model, the first driving gear and the first driven gear in the first-stage speed reducing mechanism are set to have a proper transmission ratio, when the worm drives the worm gear to rotate, the rotation stroke of the first driven gear is reduced, the rotation speed is further reduced, and then the first connecting gear and the second connecting gear in the second-stage speed reducing mechanism are set to have a proper transmission ratio; a proper transmission ratio is set for the second driving gear and the second driven gear, two-stage speed reduction is integrated, the total reduction ratio amplification effect is formed, the fine transmission relation that the worm needs to rotate by multiple circles to drive the second driven gear to rotate is finally achieved, the linear displacement or angular displacement corresponding to single-circle rotation of the valve rod is greatly reduced, and the control precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve actuator technology, and in particular to a temperature control valve actuator. Background Technology

[0002] Temperature control valve actuators are key devices that convert control signals such as electrical and pneumatic signals into mechanical actions to drive valves and regulate fluid flow to achieve automatic temperature control. They typically consist of a drive unit, a control unit, a transmission mechanism, and a feedback device. Their core function is to precisely regulate temperature through a closed-loop control system, achieving automated operation to improve system stability. They also offer advantages such as energy saving, ensuring system safety, adaptability to various working conditions, and integrated control. They are widely used in scenarios requiring precise temperature control, such as HVAC, industrial heating, refrigeration systems, and chemical processes.

[0003] However, in existing technologies, the reduction ratio of traditional worm gear drives a single-stage reduction gear transmission mechanism is limited. A single rotation often causes the valve stem to produce a large linear or angular displacement, which means that a small change in the control signal requires a large physical stroke, making it difficult to achieve fine adjustment. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a temperature control valve actuator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a temperature control valve actuator, comprising a mounting housing, an electric drive mechanism mounted on the surface of the mounting housing, the electric drive mechanism comprising a geared motor, a worm gear fixedly connected to the output end of the geared motor, the worm gear being rotatably connected to the interior of the mounting housing, a first connecting shaft being rotatably connected to the interior of the mounting housing, and a worm wheel fixedly connected to the surface of the first connecting shaft, the worm gear meshing with the worm wheel, a primary reduction mechanism mounted inside the mounting housing, a secondary reduction mechanism mounted below the primary reduction mechanism, the primary reduction mechanism comprising a primary drive gear and a second connecting shaft, the primary drive gear being fixedly connected to the primary connecting shaft, the second connecting shaft being rotatably connected to the interior of the mounting housing, and a primary driven gear fixedly connected to the surface of the second connecting shaft, the primary drive gear meshing with the primary driven gear;

[0006] The two-stage reduction mechanism includes a first connecting gear, a second connecting gear, a second driving gear, and a second driven gear. The first connecting gear is fixedly connected to the second connecting shaft, the second connecting gear is fixedly connected to the first connecting shaft, the second driving gear is fixedly connected to the first connecting shaft, the second driven gear is rotatably connected to the mounting housing, and the second driven gear meshes with the second driving gear. The second driven gear is fixedly connected to the connecting end, and the connecting end is rotatably connected to the mounting housing.

[0007] Preferably, a manual drive mechanism is installed at the end of the worm gear.

[0008] Preferably, the manual drive mechanism includes a female head, which is fixedly connected to the end of the worm gear, and a male head is inserted into the side of the female head, with a handle fixedly connected to the surface of the male head.

[0009] Preferably, the male head has a fixed connecting rod on its side, and the female head has a limiting hole on its surface, with the connecting rod located inside the limiting hole and inserted into the female head.

[0010] Preferably, a first magnet is fixedly connected to the end of the insertion rod, and a second magnet is fixedly connected inside the limiting hole, with the first magnet and the second magnet being in contact.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, a geared motor ensures that minute changes in the control signal can be accurately converted into worm rotation. An appropriate transmission ratio is set between the worm and worm wheel to achieve initial deceleration. An appropriate transmission ratio is then set between the first driving gear and the first driven gear in the first-stage reduction mechanism. When the worm drives the worm wheel to rotate, the rotational stroke of the first driven gear is reduced, further decreasing the speed. Then, an appropriate transmission ratio is set between the first connecting gear and the second connecting gear in the second-stage reduction mechanism, as well as between the second driving gear and the second driven gear. Combining these two stages of reduction creates a total reduction ratio amplification effect, ultimately achieving a precise transmission relationship where the worm needs to rotate multiple times to drive the second driven gear. This significantly reduces the linear or angular displacement of the valve stem corresponding to a single rotation, improving control accuracy.

[0013] 2. In this utility model, the male and female heads are connected by magnets No. 1 and No. 2 to ensure that there is no loosening during electric drive. When the power is off, the male head can be pulled out and the handle can be rotated to manually adjust the valve opening. The cooperation between the insertion rod and the limit hole ensures the accuracy of manual operation. During manual adjustment, it can be quickly switched and the operation accuracy is ensured by the cooperation between the limit hole and the insertion rod. Ultimately, the actuator can only correspond to the sub-millimeter displacement or sub-degree angular displacement of the valve stem when the control signal changes slightly, which significantly improves the control accuracy in scenarios such as precision temperature control and micro-flow regulation, and avoids the coarse adjustment defects caused by excessive stroke in traditional single-stage deceleration. Attached Figure Description

[0014] Figure 1 This utility model provides a first three-dimensional structural schematic diagram of a temperature control valve actuator;

[0015] Figure 2 This utility model provides a second three-dimensional structural diagram of a temperature control valve actuator;

[0016] Figure 3This utility model provides a three-dimensional structural diagram of the internal structure of the mounting housing in the actuator of a temperature control valve;

[0017] Figure 4 This utility model provides a three-dimensional structural diagram of a two-stage reduction mechanism in a temperature control valve actuator.

[0018] Legend: 1. Mounting housing; 2. Electric drive mechanism; 21. Gear motor; 22. Worm gear; 23. Connecting shaft No. 1; 24. Worm wheel; 3. Manual drive mechanism; 31. Male connector; 32. Handle; 33. Female connector; 34. Magnet No. 1; 35. Magnet No. 2; 4. First-stage reduction mechanism; 41. Driving gear No. 1; 42. Connecting shaft No. 2; 43. Driven gear No. 1; 5. Second-stage reduction mechanism; 51. Connecting gear No. 1; 52. Connecting gear No. 2; 53. Driving gear No. 2; 54. Driven gear No. 2; 6. Connecting end. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figures 1-4 As shown, this utility model provides a temperature control valve actuator, including a mounting housing 1. An electric drive mechanism 2 is mounted on the surface of the mounting housing 1. The electric drive mechanism 2 includes a geared motor 21. A worm gear 22 is fixedly connected to the output end of the geared motor 21. The worm gear 22 is rotatably connected to the interior of the mounting housing 1. A first connecting shaft 23 is rotatably connected to the interior of the mounting housing 1, and a worm wheel 24 is fixedly connected to the surface of the first connecting shaft 23. The worm gear 22 meshes with the worm wheel 24. A first-stage reduction mechanism 4 is mounted inside the mounting housing 1. A second-stage reduction mechanism 5 is mounted below the first-stage reduction mechanism 4. The first-stage reduction mechanism 4 includes a first driving gear 41 and a second connecting shaft 42. The first driving gear 41 is fixedly connected to the first connecting shaft 23. The second connecting shaft 42 is rotatably connected to the interior of the mounting housing 1, and a first driven gear 43 is fixedly connected to the surface of the second connecting shaft 42. The first driving gear 41 meshes with the first driven gear 43.

[0022] The secondary reduction mechanism 5 includes a first connecting gear 51, a second connecting gear 52, a second driving gear 53, and a second driven gear 54. The first connecting gear 51 is fixedly connected to the second connecting shaft 42, the second connecting gear 52 is fixedly connected to the first connecting shaft 23, the second driving gear 53 is fixedly connected to the first connecting shaft 23, the second driven gear 54 is rotatably connected to the mounting housing 1, and the second driven gear 54 meshes with the second driving gear 53. The second driven gear 54 is fixedly connected to the connecting end 6, and the connecting end 6 is rotatably connected to the mounting housing 1.

[0023] The specific settings and functions of this embodiment are described in detail below. The geared motor 21 ensures that minute changes in the control signal can be accurately converted into rotation of the worm 22. The worm 22 and the worm wheel 24 are set with an appropriate transmission ratio to achieve initial deceleration. The first driving gear 41 and the first driven gear 43 in the first-stage reduction mechanism 4 are set with an appropriate transmission ratio. When the worm 22 drives the worm wheel 24 to rotate, the rotation stroke of the first driven gear 43 is reduced, further reducing the speed.

[0024] Then, by setting an appropriate transmission ratio between the first connecting gear 51 and the second connecting gear 52 in the second-stage reduction mechanism 5, and setting an appropriate transmission ratio between the second driving gear 53 and the second driven gear 54, the two-stage reduction is combined to form a total reduction ratio amplification effect. This ultimately achieves a fine transmission relationship where the worm gear 22 needs to rotate multiple times to drive the second driven gear 54 to rotate, which greatly reduces the linear or angular displacement of the valve stem corresponding to a single rotation and improves control accuracy.

[0025] Example 2: Figure 1 , Figure 2 and Figure 3 As shown, a manual drive mechanism 3 is installed at the end of the worm gear 22. The manual drive mechanism 3 includes a female head 33, which is fixedly connected to the end of the worm gear 22. A male head 31 is inserted into the side of the female head 33. A handle 32 is fixedly connected to the surface of the male head 31. A rod is fixedly connected to the side of the male head 31. A limit hole is provided on the surface of the female head 33. The rod is located inside the limit hole and inserted into the female head 33. A first magnet 34 is fixedly connected to the end of the rod. A second magnet 35 is fixedly connected inside the limit hole. The first magnet 34 and the second magnet 35 are in contact.

[0026] The overall effect of this embodiment is that the male head 31 and the female head 33 are connected by magnet 34 and magnet 35 to ensure that there is no loosening during electric drive. When the power is off, the male head 31 can be pulled out and the handle 32 can be rotated to manually adjust the valve opening. The cooperation between the insertion rod and the limit hole ensures the accuracy of manual operation. During manual adjustment, it can be quickly switched and the operation accuracy is ensured by the cooperation between the limit hole and the insertion rod. Ultimately, the actuator can only correspond to the sub-millimeter displacement or sub-degree angular displacement of the valve stem when the control signal changes slightly. This significantly improves the control accuracy in scenarios such as precision temperature control and micro-flow regulation, and avoids the "coarse adjustment" defect caused by excessive stroke in traditional single-stage deceleration.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A temperature control valve actuator, comprising a mounting housing (1), an electric drive mechanism (2) mounted on the surface of the mounting housing (1), the electric drive mechanism (2) comprising a geared motor (21), a worm gear (22) fixedly connected to the output end of the geared motor (21), the worm gear (22) being rotatably connected to the interior of the mounting housing (1), a first connecting shaft (23) being rotatably connected to the interior of the mounting housing (1), and a worm wheel (24) fixedly connected to the surface of the first connecting shaft (23), the worm gear (22) meshing with the worm wheel (24), characterized in that: The mounting housing (1) is equipped with a first-stage reduction mechanism (4), and a second-stage reduction mechanism (5) is installed at the bottom of the first-stage reduction mechanism (4). The first-stage reduction mechanism (4) includes a first-stage driving gear (41) and a second-stage connecting shaft (42). The first-stage driving gear (41) is fixedly connected to the first-stage connecting shaft (23), and the second-stage connecting shaft (42) is rotatably connected to the inside of the mounting housing (1). A first-stage driven gear (43) is fixedly connected to the surface of the second-stage connecting shaft (42). The first-stage driving gear (41) meshes with the first-stage driven gear (43). The secondary reduction mechanism (5) includes a first connecting gear (51), a second connecting gear (52), a second driving gear (53), and a second driven gear (54). The first connecting gear (51) is fixedly connected to the second connecting shaft (42), the second connecting gear (52) is fixedly connected to the first connecting shaft (23), the second driving gear (53) is fixedly connected to the first connecting shaft (23), the second driven gear (54) is rotatably connected to the mounting housing (1), and the second driven gear (54) meshes with the second driving gear (53). The second driven gear (54) is fixedly connected to the connecting end (6), and the connecting end (6) is rotatably connected to the mounting housing (1).

2. The temperature control valve actuator according to claim 1, characterized in that: A manual drive mechanism (3) is installed at the end of the worm (22).

3. The temperature control valve actuator according to claim 2, characterized in that: The manual drive mechanism (3) includes a female head (33), which is fixedly connected to the end of the worm gear (22), and a male head (31) is inserted into the side of the female head (33), and a handle (32) is fixedly connected to the surface of the male head (31).

4. The temperature control valve actuator according to claim 3, characterized in that: The male head (31) is fixedly connected to the plug rod on the side, and the female head (33) is provided with a limit hole on its surface. The plug rod is located inside the limit hole and is inserted into the female head (33).

5. The temperature control valve actuator according to claim 4, characterized in that: A first magnet (34) is fixedly connected to the end of the insertion rod, and a second magnet (35) is fixedly connected inside the limiting hole. The first magnet (34) and the second magnet (35) are in contact.

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