Low-impact large-torque regulating valve execution structure

Abstract

The utility model discloses a low-impact large-torque regulating valve execution structure, and belongs to the technical field of valve driving. The mechanism comprises a motor, a main shaft, a limiting mechanism and a change gear set. The motor drives the change gear set through the motor gear and further drives the spindle gear to rotate. The lower end of the change gear set is connected with a spring, and a touch rod is arranged above. When the touch pressing rod is pressed, the change gear set overcomes the elastic force of the spring to move downwards and is disengaged from the main shaft gear, and manual / automatic mode switching is achieved. The limiting mechanism triggers a microswitch through a limiting rod on a main shaft gear, and the rotating angle of the main shaft is accurately controlled. According to the utility model, gear meshing transmission is adopted to replace a torsion spring structure, so that mechanical impact during large-torque action is avoided, and the stability of frequent opening and closing is remarkably improved; when the motor loses power, gear meshing can be separated through one key of the touch rod, two-way free manual operation of the valve is achieved, and potential safety hazards in the emergency state are avoided. The valve is suitable for frequent opening and closing of a dust / inflammable gas environment regulating valve.

Description

Technical Field

[0001] The utility model relates to the field of valve drive technology, specifically a low-impact, high-torque regulating valve execution structure suitable for frequent opening and closing conditions, especially for regulating valve control of dust or flammable gas concentration in explosion-limited environments. Background Art

[0002] Existing technologies, such as the precise reset fire damper actuator disclosed in CN222823812U, use a motor and reduction gear set to drive a main shaft to achieve high-torque rotational positioning. Once released, the main shaft rotates rapidly under the action of a torsion spring. However, this mechanism has significant drawbacks: the instantaneous action of the torsion spring creates a strong impact on the motor and gears, making it unsuitable for frequent opening and closing operations. Frequent operation also rapidly degrades the stability of the motor and gears. Furthermore, if the motor loses power or malfunctions, the torsion spring can only complete a single action, opening or closing the valve, and cannot be opened or closed freely, posing a safety hazard. Utility Model Content

[0003] (1) Technical problems solved

[0004] The utility model aims to solve three major problems of existing regulating valve actuators: 1) eliminate mechanical shock during high torque transmission and improve the reliability of frequent opening and closing; 2) realize two-way free manual operation of the valve in the event of motor failure; 3) ensure emergency control safety in explosion-hazardous environments.

[0005] (2) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A low-impact, high-torque regulating valve execution structure, comprising: a motor, an output shaft end of which is connected to a motor gear; a main shaft, to which a main shaft gear is fixedly connected; a limiting mechanism for limiting the rotation angle of the main shaft in two rotation directions; a speed change gear set, arranged between the motor gear and the main shaft gear, and meshing with both to transmit power, the lower end of the speed change gear set being connected to a spring; a touch pressure rod, arranged above the speed change gear set; when the touch pressure rod is pressed toward the speed change gear set, it can drive the speed change gear set to overcome the elastic force of the spring and move downward, thereby causing the speed change gear set to disengage from the main shaft gear.

[0008] Preferably, the limit mechanism includes two micro switches, which are respectively arranged at the end positions of the two rotation directions of the main shaft; a limit rod is fixedly arranged on the main shaft gear; when the main shaft rotates, the limit rod rotates with it and can respectively abut against the springs of the two micro switches to trigger the limit.

[0009] Preferably, the speed gear set includes a first speed gear and a second speed gear that are meshed in sequence; wherein, the first speed gear is meshed with the motor gear, and the second speed gear is meshed with the main shaft gear; the lower end of the second speed gear is connected to the spring, and the touch pressure rod is provided above the second speed gear.

[0010] Preferably, it also includes an outer shell, an upper cover and an intermediate support plate arranged in the inner cavity of the outer shell; wherein: the intermediate support plate is detachably connected to the inner wall of the outer shell, the motor is mounted on the upper end thereof, and the motor gear passes downwardly through the through hole on the intermediate support plate; a fixed shaft is fixedly provided on the inner wall of the bottom plate of the outer shell, and a positioning hole corresponding to the fixed shaft is provided on the intermediate support plate, and the first speed change gear is rotatably and slidably mounted on the fixed shaft; a shaft sleeve is also provided on the inner wall of the bottom plate of the outer shell, and a floating shaft that can float axially is provided in the shaft sleeve, and the second speed change gear is rotatably mounted on the floating shaft; the floating shaft passes upward through the through hole on the intermediate support plate, and its shaft shoulder is located below the intermediate support plate. ; The spring sleeve is arranged on the outside of the shaft sleeve, and its upper end abuts the lower end face of the second speed gear; a seat hole is provided on the bottom plate of the outer shell, and the main shaft is rotatably supported in the seat hole, and the main shaft gear is fixed on the main shaft and abuts the upper end face of the seat hole; the main shaft passes through the intermediate support plate and the upper cover upward in sequence; the first speed gear and the main shaft gear are both located below the intermediate support plate and above the second speed gear; the lower end of the touch pressure rod is connected to the upper end of the floating shaft, and a first retaining ring is embedded in the middle of it; the upper cover is provided with an axial hole for the touch pressure rod to pass through, and the upper end face of the first retaining ring abuts the lower end face of the axial hole; the limiting mechanism is arranged at the upper end of the intermediate support plate.

[0011] Preferably, a through hole is axially provided in the middle of the main shaft, and a notch is opened at its upper end; a holder is embedded in the notch, and a U-shaped bolt for connecting to an external valve stem is connected to the holder; a second retaining ring is provided above the notch to limit the holder in the notch.

[0012] Preferably, it also includes a second retaining ring; the second retaining ring, the upper cover and the outer shell are formed by cast aluminum die casting; the lower end of the upper cover is provided with a convex ring that cooperates with the upper port of the outer shell; the part where the main shaft passes through the upper cover and the seat hole, and the part where the touch pressure rod passes through the shaft hole are both embedded with sealing gaskets.

[0013] (3) Beneficial effects

[0014] The utility model provides a low-impact, high-torque regulating valve actuator structure, which has the following beneficial effects:

[0015] Zero-impact transmission: gear meshing replaces torsion springs to eliminate instantaneous impact and extend the life of the motor and gears;

[0016] Two-way emergency manual: Press the pressure lever to disengage the gears and realize free opening and closing of the valve;

[0017] Precise limit: The limit rod cooperates with the micro switch to ensure precise control of the valve opening;

[0018] Compact sealing: cast aluminum housing and sealing gasket design, suitable for dusty / flammable environments;

[0019] Quick maintenance: The middle support plate is removable for easy inspection of the gear set. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic top view of the structure of the utility model;

[0021] Figure 2 This is a left side sectional view of the structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the connection between the middle support plate and the outer shell of the utility model;

[0023] in, Figure 3 (a) is a schematic diagram of the state in which the limit rod 25 abuts against the micro switch when the main shaft rotates counterclockwise (from a top view); Figure 3 (b) is a schematic diagram of the state in which the limit rod 25 abuts against the micro switch when the main shaft rotates clockwise (from a top view);

[0024] Figure 4 This is a top view of the gear connection state of the utility model;

[0025] Figure 5 This is a schematic diagram of the gear connection relationship of the utility model.

[0026] In the figure, 11-upper cover, 12-housing, 13-middle support plate, 14-convex ring, 15-shaft hole, 2-spindle, 21-spindle gear, 22-notch, 23-seat, 24-U-bolt, 25-limit rod, 3-fixed shaft, 31-first speed gear, 4-floating shaft, 41-second speed gear, 42-spring, 43-touch rod, 44-sleeve, 45-shoulder, 5-seat hole, 6-motor, 61-motor gear, 7-micro switch, 8a-first retaining ring, 8b-second retaining ring, 9-sealing gasket. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0030] See also Figure 1-Figure 2, an embodiment of the utility model provides a technical solution: a low-impact, high-torque regulating valve execution structure, comprising: a motor 6, an output shaft end of which is connected to a motor gear 61; a main shaft 2, on which a main shaft gear 21 is fixedly connected; a limiting mechanism for limiting the rotation angle of the main shaft 2 in two rotation directions; a speed change gear set is arranged between the motor gear 61 and the main shaft gear 21, and is engaged with the two respectively to transmit power, and the lower end of the speed change gear set is connected to a spring 42; a touch pressure rod 43 is arranged above the speed change gear set; when the touch pressure rod 43 is pressed toward the speed change gear set, it can drive the speed change gear set to overcome the elastic force of the spring 42 and move downward, thereby causing the speed change gear set to disengage from the main shaft gear 21. It should be noted that the function of the speed gear is to convert the high speed and low torque of the motor 6 into the low speed and high torque of the main shaft 2, thereby achieving low-speed, stable rotation of the control valve connected to the actuator; the motor 6 can rotate forward or reverse to the desired position (stop under the action of the limit), corresponding to the switching of the control valve on and off state; because the main shaft 2 is not provided with a torsion spring, the torque generated by the rotation of the main shaft 2 comes from the resistance required to drive the control valve to open or close; because the rotation of the main shaft 2 in both directions is actively controlled by the motor 6, and not by the torsion spring, the impact on the speed gear, especially the motor 6, caused by the rapid rebound of the torsion spring is avoided; when a power outage or electrical fault occurs, the active control of the main shaft 2 by the motor 6 is no longer reliable. The speed gear is disengaged from the gear of the main shaft 2 by the touch pressure rod 43, and the control valve can be manually opened and closed without causing any impact on the speed gear and the motor 6 during the switching process.

[0031] See also Figure 3 In this embodiment, the limit mechanism includes two microswitches 7, respectively positioned at the endpoints of the two rotational directions of the spindle 2. A limit rod 25 is fixedly mounted on the spindle gear 21. When the spindle 2 rotates, the limit rod 25 rotates with it and can abut against the springs of the two microswitches 7 to trigger the limit. It should be noted that the operating principle of the microswitch 7 is that when the limit rod 25 abuts the spring of the microswitch 7, its internal connection state changes. This signal can be transmitted externally to indicate the current switch state, or it can provide feedback to the motor 6 to cut off the motor 6's operation and achieve a limit effect.

[0032] See also Figure 2 、 Figure 4 、 Figure 5In this embodiment, the speed change gear set includes a first speed change gear 31 and a second speed change gear 41 meshing in sequence. The first speed change gear 31 meshes with the motor gear 61, and the second speed change gear 41 meshes with the main shaft gear 21. The lower end of the second speed change gear 41 is connected to the spring 42, and the pressure contact rod 43 is located above the second speed change gear 41. It should be noted that the multi-stage speed change can further increase the torque limit of the main shaft 2, improving the stability and reliability of the main shaft 2's rotation.

[0033] See also Figure 2 、 Figure 4 、 Figure 5 In this embodiment, it also includes a shell 12, an upper cover 11 and an intermediate support plate 13 arranged in the inner cavity of the shell 12; wherein: the intermediate support plate 13 is detachably connected to the inner wall of the shell 12, and the motor 6 is installed on its upper end, and the motor gear 61 passes downwardly through the through hole on the intermediate support plate 13; a fixed shaft 3 is fixedly provided on the inner wall of the bottom plate of the shell 12, and a positioning hole corresponding to the fixed shaft 3 is provided on the intermediate support plate 13, and the first speed change gear 31 is rotatably and slidably mounted on the fixed shaft 3 up and down; a shaft sleeve 44 is also provided on the inner wall of the bottom plate of the shell 12, and an axially floating floating shaft 4 is matched in the shaft sleeve 44, and the second speed change gear 41 is rotatably mounted on the floating shaft 4; the floating shaft 4 passes upward through the through hole on the intermediate support plate 13, and its shaft shoulder 45 is located at the lower end of the intermediate support plate 13 The spring 42 is sleeved on the outside of the shaft sleeve 44, and its upper end abuts the lower end surface of the second speed gear 41; a seat hole 5 is provided on the bottom plate of the housing 12, and the main shaft 2 is rotatably supported in the seat hole 5, and the main shaft gear 21 is fixed on the main shaft 2 and abuts the upper end surface of the seat hole 5; the main shaft 2 passes through the intermediate support plate 13 and the upper cover 11 upward in sequence; the first speed gear 31 and the main shaft gear 21 are both located below the intermediate support plate 13 and above the second speed gear 41; the lower end of the touch pressure rod 43 is connected to the upper end of the floating shaft 4, and a first retaining ring 8a is embedded in the middle of it; the upper cover 11 is provided with an axial hole 15 for the touch pressure rod 43 to pass through, and the upper end surface of the first retaining ring 8a abuts the lower end surface of the axial hole 15; the limiting mechanism is provided at the upper end of the intermediate support plate 13. It should be noted that: by arranging the first speed gear 31 above the second speed gear 41, the second speed gear 41 plays the role of supporting the first speed gear 31. When the second speed gear 41 moves downward to disengage or moves upward to reset the engagement, the first speed gear 31 moves downward or upward synchronously with it.

[0034] See also Figure 1 、 Figure 2In this embodiment, a through-hole is axially provided in the middle of the main shaft 2, with a notch 22 defined at its upper end. A retaining seat 23 is embedded within the notch 22, to which a U-bolt 24 is attached for connecting to an external valve stem. A second retaining ring 8b is positioned above the notch 22 to retain the retaining seat 23 within the notch 22. It should be noted that by inserting the external valve stem, i.e., the regulating valve stem connected to the actuator, into the through-hole of the main shaft 2 and securing it with the U-bolt 24, the connection is stabilized, ensuring reliable transmission of high torque.

[0035] See also Figure 2 In this embodiment, a second retaining ring 8b is also included; the second retaining ring 8b, the upper cover 11, and the outer shell 12 are formed by die-casting of cast aluminum; a convex ring 14 is provided at the lower end of the upper cover 11 to cooperate with the upper end of the outer shell 12; a sealing gasket 9 is embedded in the portion where the main shaft 2 passes through the upper cover 11 and the seat hole 5, and in the portion where the pressure rod 43 passes through the shaft hole 15. It should be noted that cast aluminum is not prone to generating electric sparks; the convex ring 14 provided at the lower end of the upper cover 11 cooperates with the upper end of the outer shell 12 to form a labyrinth seal; by embedding sealing gaskets 9 in the portion where the main shaft 2 passes through the upper cover 11 and the seat hole 5, and in the portion where the pressure rod 43 passes through the shaft hole 15, electric sparks generated by the movement of internal components can be prevented from being transmitted to the outside, and external dust or combustible gas can be prevented from entering the interior of the actuator, thereby achieving an explosion-proof effect. The actuator is suitable for use in places with explosion-proof requirements.

[0036] The working principle and use process of this utility model: When in use,

[0037] In automatic mode: the motor 6 rotates forward / reverse → the motor gear 61 drives the speed change gear set → the main shaft gear 21 drives the main shaft 2 to rotate → the limit rod 25 stops when it touches the micro switch 7, completing the valve opening and closing.

[0038] In the emergency manual mode: press the pressure rod 43 → push the floating shaft 4 and the second speed change gear 41 downward to compress the spring 42 → the second speed change gear 41 is disengaged from the main shaft gear 21 → manually rotate the main shaft 2 to freely adjust the valve.

[0039] Reset mode: Release the pressure rod 43, and the spring 42 pushes the second speed change gear 41 upward to reset the engagement.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A low-impact, high-torque regulating valve execution structure, characterized in that: include: A motor (6), the output shaft end of which is connected to a motor gear (61); a main shaft (2) to which a main shaft gear (21) is fixedly connected; A limiting mechanism for limiting the bidirectional rotation angle of the main shaft (2); A speed change gear set, meshing the motor gear (61) with the main shaft gear (21) for transmission; A floating shaft (4) is arranged to float axially; a spring (42) acting on the floating shaft (4); The speed change gear set comprises a second speed change gear (41) rotatably sleeved on the floating shaft (4), wherein the second speed change gear (41) elastically abuts against the floating shaft (4) via a spring (42).

2. The low-impact, high-torque regulating valve actuator structure according to claim 1, characterized in that: The speed change gear set comprises a first speed change gear (31) and a second speed change gear (41) meshed in sequence; the first speed change gear (31) meshes with the motor gear (61), and the second speed change gear (41) meshes with the main shaft gear (21); the lower end of the second speed change gear (41) abuts against the spring (42); A touch-pressure rod (43) is provided, the lower end of which is connected to the upper end of the floating shaft (4); A shaft sleeve (44) is provided, in which the floating shaft (4) is fitted, and on the outside of which the spring (42) is sleeved.

3. The low-impact, high-torque regulating valve actuator structure according to claim 2, characterized in that: It also includes a shell (12), an upper cover (11), and an intermediate support plate (13) arranged in the inner cavity of the shell (12); wherein: The intermediate support plate (13) is detachably connected to the inner wall of the housing (12), and the motor (6) is mounted on the upper end thereof, and the motor gear (61) passes downward through the through hole on the intermediate support plate (13); A fixed shaft (3) is fixedly provided on the inner wall of the bottom plate of the housing (12); a positioning hole corresponding to the fixed shaft (3) is provided on the intermediate support plate (13); and the first speed change gear (31) is rotatably and slidably mounted on the fixed shaft (3); The inner wall of the bottom plate of the housing (12) is provided with the shaft sleeve (44), the floating shaft (4) passes upward through the through hole on the middle supporting plate (13), and its shaft shoulder (45) is located below the middle supporting plate (13); A seat hole (5) is provided on the bottom plate of the housing (12), the main shaft (2) is rotatably supported in the seat hole (5), the main shaft gear (21) is fixed on the main shaft (2) and abuts against the upper end surface of the seat hole (5); the main shaft (2) passes upward through the intermediate support plate (13) and the upper cover (11); The first speed change gear (31) and the main shaft gear (21) are both located below the intermediate support plate (13) and above the second speed change gear (41).

4. The low-impact, high-torque regulating valve actuator structure according to claim 3, characterized in that: A first retaining ring (8a) is embedded in the middle of the touch-pressure rod (43); an axial hole (15) for the touch-pressure rod (43) to pass through is provided on the upper cover (11), and the upper end surface of the first retaining ring (8a) abuts against the lower end surface of the axial hole (15); The limiting mechanism is arranged at the upper end of the middle supporting plate (13).

5. The low-impact, high-torque regulating valve actuator structure according to claim 1, characterized in that: The limit mechanism comprises two micro switches (7) respectively arranged at the end positions of the two rotation directions of the main shaft (2); a limit rod (25) is fixedly arranged on the main shaft gear (21); when the main shaft (2) rotates, the limit rod (25) rotates with it and can respectively abut against the springs of the two micro switches (7) to trigger the limit.

6. The low-impact, high-torque regulating valve actuator according to claim 1, characterized in that: A through hole is axially provided in the middle of the main shaft (2), and a notch (22) is provided at the upper end thereof; a holder (23) is embedded in the notch (22), and a U-shaped bolt (24) for connecting to an external valve stem is connected to the holder (23); a second retaining ring (8b) is provided above the notch (22) to limit the holder (23) in the notch (22).

7. The low-impact, high-torque regulating valve actuator according to claim 4, characterized in that: It also includes a second retaining ring (8b); the second retaining ring (8b), the upper cover (11) and the outer shell (12) are formed by die-casting of cast aluminum; the lower end of the upper cover (11) is provided with a convex ring (14) that cooperates with the upper end of the outer shell (12); the part where the main shaft (2) passes through the upper cover (11) and the seat hole (5), and the part where the touch pressure rod (43) passes through the shaft hole (15) are both embedded with sealing gaskets (9).

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