A valve actuator for precise stroke regulation

Abstract

The utility model is suitable for flow control technical field provides a kind of valve actuator for accurate adjustment stroke, including linkage mechanism and the transmission mechanism being arranged below the linkage mechanism, the linkage mechanism and transmission mechanism are all installed in mounting assembly, support assembly is also installed on the mounting assembly, the linkage mechanism includes microswitch and adjusting assembly, adjusting assembly is installed below the linkage mechanism, linkage shaft is set with turbine on the linkage shaft, adjusting assembly is fixed on support assembly, adjusting assembly includes fixed block, adjusting disc is installed on the fixed block top, adjusting assembly further includes the first adjusting rod and the second adjusting rod rotationally arranged in the middle of fixed block, by adopting first adjusting tooth and first stroke stop block engagement and second adjusting rod and second stroke stop block engagement adjustment complete start and complete closing limit position, reach the effect of accurate adjustment in the working process of valve actuator to working condition.

Description

Technical Field

[0001] This utility model relates to the field of flow control technology, and more specifically, to a valve actuator for precisely adjusting the stroke. Background Technology

[0002] Valve actuators are key devices in automated control systems that drive valve movement. They receive control signals to precisely operate the valve's opening, closing, or regulation, achieving intelligent control of parameters such as fluid flow, pressure, and direction. They are widely used in petroleum, chemical, power, and water treatment industries, and feature remote operation, high precision, and high reliability.

[0003] Currently, when adjusting the stroke of a valve actuator, the valve needs to be turned to the fully open position using a handwheel. Then, a screwdriver is used to loosen the locking screw, allowing the limit nut to rotate along the thread direction of the turbine. The position of the nut is adjusted, thereby controlling the contact position between the nut and the microswitch to achieve the purpose of stroke adjustment. By setting the contact position between the nut and the microswitch, the two extreme positions of fully open and fully closed can be adjusted, ensuring that when a control signal is received, the command of the control system and the actual opening degree of the valve are precisely synchronized.

[0004] However, the existing adjustment method requires disassembling the valve actuator housing, loosening the screws of the lock nut with a screwdriver, and then tightening the screws after adjusting the position of the nut. The adjustment method is cumbersome and not precise enough for adjusting the stroke.

[0005] To address the aforementioned problems, this utility model proposes a valve actuator for precisely adjusting the stroke. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A valve actuator for precise stroke adjustment includes a linkage mechanism and a transmission mechanism disposed below the linkage mechanism. Both the linkage mechanism and the transmission mechanism are mounted in a mounting assembly, which also has a support assembly mounted on it. The linkage mechanism includes a micro switch and an adjustment assembly. A linkage shaft is mounted below the adjustment assembly, and a turbine is sleeved on the linkage shaft. The adjustment assembly is fixed to the support assembly. The adjustment assembly includes a fixed block, and an adjustment plate is mounted above the fixed block. The adjustment assembly also includes a first adjustment rod and a second adjustment rod rotatably disposed in the middle of the fixed block. The adjustment plate has through holes adapted to the first and second adjustment rods. Adaptive adjustment platforms are disposed below the first and second adjustment rods. A first adjustment tooth is disposed on the first adjustment rod near the fixed block, and a second adjustment tooth is disposed on the second adjustment rod near the adjustment platform. A first stroke stop and a second stroke stop are sequentially sleeved on the adjustment platform. The first stroke stop is adapted to the first adjustment tooth, and the second stroke stop is adapted to the second adjustment tooth. The transmission mechanism provides power to the adjustment assembly.

[0008] The present invention is further configured such that: there are four micro switches, and two micro switches are arranged in a group to correspond to the first stroke block and the second stroke block respectively.

[0009] The present invention is further configured such that: both the first stroke stop and the second stroke stop are provided with toothed rings, the inner teeth of the first stroke stop mesh with the first adjusting tooth, and the inner teeth of the second stroke stop mesh with the second adjusting tooth.

[0010] The present invention is further configured such that: the support component includes a support platform, the support platform is provided with a linkage groove, the linkage mechanism further includes a driving capacitor, the micro switch and the driving capacitor are both fixed on the support platform, and the adjustment component is rotatably mounted on the linkage groove.

[0011] The present invention is further configured such that: the valve actuator for precise adjustment of the stroke also includes a transmission cover disposed above the mounting assembly and an adjustment cover disposed on the side of the mounting assembly.

[0012] The present invention is further configured such that: the mounting assembly includes a valve housing, and the valve housing is respectively provided with a motor mounting groove, a first fixing groove, a first transmission groove, a second transmission groove, a worm groove, a second fixing groove and an adjustment groove, and the linkage shaft is rotatably disposed in the adjustment groove.

[0013] The present invention is further configured such that: the transmission mechanism includes a drive motor, the drive motor is installed in a motor mounting slot, a fixing component is installed on the first fixing slot, the fixing component includes a first fixing platform, the first fixing platform is fixed on the first fixing slot, and an output slot and a positioning slot are provided on the first fixing platform.

[0014] The present invention is further configured such that: the output end of the drive motor passes through the output slot, a first transmission tooth is rotatably mounted on the positioning slot, the output end of the drive motor meshes with the first transmission tooth, a second transmission tooth is rotatably mounted on the first transmission slot, a first driven tooth is mounted on the second transmission tooth, and the second transmission tooth meshes with the first transmission tooth.

[0015] The present invention is further configured such that: a third transmission tooth is rotatably mounted on the second transmission groove, the third transmission tooth meshes with a first driven tooth, a second driven tooth is mounted below the third transmission tooth, a worm is rotatably mounted in the worm groove, a second fixed platform is mounted on the second fixed groove, and a fourth transmission tooth is mounted through the second fixed platform at the output end of the worm.

[0016] The present invention is further configured such that: the second driven tooth meshes with the fourth transmission tooth, and the worm meshes with the turbine.

[0017] In summary, this application includes at least one of the following beneficial technical effects: The adjusting component is fixed to the linkage shaft. When the turbine drives the linkage shaft to rotate, the adjusting component also rotates synchronously. Through the through hole on the adjusting plate, the rotation of the first adjusting rod and the second adjusting rod can be adjusted separately using a wrench. When the first adjusting rod is rotated, the first adjusting tooth rotates synchronously, adjusting the position of the first stroke stop. When the second adjusting rod is rotated, the second adjusting tooth rotates synchronously, adjusting the position of the second stroke stop. By using the engagement of the first adjusting tooth with the first stroke stop and the engagement of the second adjusting rod with the second stroke stop to adjust the fully start and fully close limit positions, the effect of precise adjustment of the working state during the operation of the valve actuator is achieved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a valve actuator for precise stroke adjustment according to the present invention.

[0019] Figure 2 for Figure 1 A schematic diagram of the explosion structure.

[0020] Figure 3 for Figure 2 Exploded view of the transmission mechanism and fixed components.

[0021] Figure 4 for Figure 2A schematic diagram of the overall structure of the components installed in the middle.

[0022] Figure 5 for Figure 1 A schematic diagram of the cooperation structure between the transmission mechanism and the mounting components.

[0023] Figure 6 for Figure 2 Exploded view of the linkage mechanism and supporting components.

[0024] Figure 7 for Figure 6 Exploded view of the regulating component.

[0025] Figure 8 for Figure 7 A schematic diagram of the overall structure of the central regulating platform.

[0026] Explanation of reference numerals in the attached diagram: 1. Adjusting the cover; 2. Transmission cover; 3. Mounting components; 31. Valve body; 32. Motor mounting slot; 33. First fixing slot; 34. First transmission slot; 35. Second transmission slot; 36. Worm gear slot; 37. Second fixing slot; 38. Adjustment slot; 4. Transmission mechanism; 41. Drive motor; 42. First transmission gear; 43. Second transmission gear; 44. First driven gear; 45. Third transmission gear; 46. Second driven gear; 47. Fourth transmission gear; 48. Worm gear; 5. Fixing components; 51. First fixing platform; 52. Output slot; 53. Positioning slot; 54. Second fixing platform; 6. Linkage mechanism; 61. Micro switch; 62. Adjustment assembly; 621. Adjustment disc; 622. Fixing block; 623. First adjusting rod; 624. First adjusting tooth; 625. Second adjusting rod; 626. Second adjusting tooth; 627. First stroke stop; 628. Second stroke stop; 629. Adjustment platform; 6291. Adjustment platform body; 6292. Rotating groove; 6293. Connecting groove; 63. Drive capacitor; 64. Linkage shaft; 65. Turbine; 7. Support components; 71. Support platform; 72. Linkage groove. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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, they should not be construed as limitations on this utility model.

[0031] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0032] Please see Figure 1-8 The present invention provides the following technical solution: A valve actuator for precise stroke adjustment further includes a transmission cover 2 disposed above a mounting assembly 3 and an adjustment cover 1 disposed on the side of the mounting assembly 3. It includes a linkage mechanism 6 and a transmission mechanism 4 disposed below the linkage mechanism 6. Both the linkage mechanism 6 and the transmission mechanism 4 are mounted in the mounting assembly 3. A support assembly 7 is also mounted on the mounting assembly 3.

[0033] Mounting component 3 provides the installation position. The upper transmission cover 2 is used for adjustment in the stopped state. The transmission cover 2 is equipped with a cover. Opening the cover allows adjustment of the linkage mechanism 6. The adjustment cover 1 covers the movement of the transmission mechanism 4 to prevent dust from entering. The transmission mechanism 4 is also equipped with an openable cover for observing its working status. The working status of the entire valve actuator can be judged from the working status of the transmission mechanism 4. The linkage mechanism 6 is used to adjust the movement stroke of the valve actuator. By adjusting the linkage mechanism 6, the opening or closing of the entire valve actuator is controlled. The support component 7 supports the position of the linkage mechanism 6 in the mounting component 3.

[0034] Mounting assembly 3 includes valve housing 31, on which are respectively provided motor mounting groove 32, first fixing groove 33, first transmission groove 34, second transmission groove 35, worm groove 36, second fixing groove 37 and adjusting groove 38.

[0035] Mounting component 3 provides an installation location; motor mounting slot 32 and worm slot 36 are used to install components; first fixing slot 33 and second fixing slot 37 are used to install brackets; first transmission slot 34 and second transmission slot 35 are used to install transmission gears.

[0036] The transmission mechanism 4 includes a drive motor 41, which is installed in the motor mounting slot 32. A fixing component 5 is installed on the first fixing slot 33. The fixing component 5 includes a first fixing platform 51, which is fixed on the first fixing slot 33. The first fixing platform 51 is provided with an output slot 52 and a positioning slot 53.

[0037] The output end of the drive motor 41 passes through the output slot 52. The size of the output slot 52 is adapted to the output end of the drive motor 41 to ensure that the motor output end can pass through smoothly without shaking. A first transmission gear 42 is rotatably mounted on the positioning slot 53. The output end of the drive motor 41 meshes with the first transmission gear 42. The first transmission gear 42 can rotate flexibly on the bearing. A second transmission gear 43 is rotatably mounted on the first transmission slot 34. A first driven gear 44 is mounted on the second transmission gear 43. The second transmission gear 43 meshes with the first transmission gear 42.

[0038] The output of the drive motor 41 rotates, causing the first transmission gear 42 to rotate. Bearings are provided at both the upper and lower ends of the intermediate shaft of the first transmission gear 42. The second transmission gear 43 and the first driven gear 44 adopt an integrated design and are fixed on the same intermediate shaft. High-precision cylindrical roller bearings are installed at both the upper and lower ends of the intermediate shaft. The bearings are installed in the bearing mounting seats of the first transmission groove 34 to avoid coaxiality errors caused by the separate installation of the two gears, and to ensure that the second transmission gear 43 and the first driven gear 44 always maintain precise coaxial rotation. The first fixed platform 51 is fixed on the first fixed groove 33 by bolts. The bearing below the first transmission gear 42 is fixed to the positioning groove 53, so that the first transmission gear 42 can rotate on the bearing.

[0039] The number of teeth and module of the first driven tooth 44 are optimized to achieve a specific reduction ratio, which converts the high speed of the drive motor 41 into a low speed suitable for subsequent transmission, while increasing the torque to meet the power requirements during the valve stroke adjustment process.

[0040] A third transmission gear 45 is rotatably mounted on the second transmission groove 35. The third transmission gear 45 meshes with the first driven gear 44. A second driven gear 46 is mounted below the third transmission gear 45. A worm 48 is rotatably mounted in the worm groove 36. A second fixed platform 54 is mounted on the second fixed groove 37. A fourth transmission gear 47 is mounted through the second fixed platform 54 at the output end of the worm 48. The second driven gear 46 meshes with the fourth transmission gear 47.

[0041] When the first transmission gear 42 rotates, it drives the second transmission gear 43 to rotate. The rotation of the second transmission gear 43 synchronously drives the first driven gear 44 to rotate. Bearings are also provided at the upper and lower ends of the intermediate shaft of the second driven gear 46 and the third transmission gear 45. The second driven gear 46 and the third transmission gear 45 are fixed on the same intermediate shaft. When the first driven gear 44 rotates, it drives the third transmission gear 45 to rotate. When the third transmission gear 45 rotates, it drives the second driven gear 46 to rotate. The second driven gear 46 drives the fourth transmission gear 47 to rotate. The fourth transmission gear 47 synchronously drives the output end of the worm gear 48 to rotate, and then the worm gear rotates.

[0042] The linkage mechanism 6 includes a micro switch 61 and an adjusting component 62. A linkage shaft 64 is installed below the adjusting component 62, and a turbine 65 is sleeved on the linkage shaft 64. The adjusting component 62 is fixed on the support component 7. The adjusting component 62 includes a fixing block 622, and an adjusting plate 621 is installed above the fixing block 622. The adjusting component 62 also includes a first adjusting rod 623 and a second adjusting rod 625 rotatably disposed in the middle of the fixing block 622. The adjusting plate 621 is provided with through holes adapted to the first adjusting rod 623 and the second adjusting rod 625. Below the first adjusting rod 623 and the second adjusting rod 625, there is a matching adjusting platform 629. The first adjusting rod 623 is provided with a first adjusting tooth 624 near the fixed block 622, and the second adjusting rod 625 is provided with a second adjusting tooth 626 near the adjusting platform 629. The first stroke stop 627 and the second stroke stop 628 are sequentially fitted on the adjusting platform 629. The first stroke stop 627 is adapted to the first adjusting tooth 624, and the second stroke stop 628 is adapted to the second adjusting tooth 626. The transmission mechanism 4 provides power to the adjusting assembly 62.

[0043] The adjusting component 62 is fixed to the linkage shaft 64. When the turbine 65 drives the linkage shaft 64 to rotate, the adjusting component 62 also rotates synchronously. Through the through hole on the adjusting disc 621, a wrench can be used to adjust the rotation of the first adjusting rod 623 and the second adjusting rod 625 respectively. When the first adjusting rod 623 is rotated, the first adjusting tooth 624 rotates synchronously, adjusting the position of the first stroke stop 627. When the second adjusting rod 625 is rotated, the second adjusting tooth 626 rotates synchronously, adjusting the position of the second stroke stop 628. By using the engagement of the first adjusting tooth 624 with the first stroke stop 627 and the engagement of the second adjusting rod 625 with the second stroke stop 628 to adjust the fully start and fully close limit positions, the effect of precise adjustment of the working state during the operation of the valve actuator is achieved.

[0044] There are four microswitches 61. Two microswitches 61 are grouped together, corresponding to the first stroke stop 627 and the second stroke stop 628 respectively.

[0045] The two sets of microswitches 61 are for fully on and fully off, respectively. The first travel stop 627 is above a set of microswitches 61 for fully on, and the second travel stop 628 is below a set of microswitches 61 for fully off.

[0046] Both the first stroke stop 627 and the second stroke stop 628 are equipped with gear rings. The internal teeth of the first stroke stop 627 mesh with the first adjusting tooth 624, and the internal teeth of the second stroke stop 628 mesh with the second adjusting tooth 626.

[0047] Through the meshing mechanism, the rotation angle of the first stroke stop 627 is precisely adjusted when the first adjusting tooth 624 rotates, and the rotation angle of the second stroke stop 628 is precisely adjusted when the second adjusting tooth 626 rotates, allowing for fine-tuning. The adjusting platform 629 includes an adjusting platform body 6291, with symmetrically arranged rotating grooves 6292 on both sides of the adjusting platform body 6291. A connecting groove 6293 is adapted to be arranged below the rotating groove 6292. The first adjusting rod 623 and the second adjusting rod 625 are rotatably installed, and the bottoms of the first adjusting rod 623 and the second adjusting rod 625 are adapted to be arranged in the two connecting grooves 6293 respectively.

[0048] The linkage shaft 64 is rotatably set in the adjustment groove 38, the worm gear 48 meshes with the turbine 65, the support assembly 7 includes a support platform 71, the support platform 71 is provided with a linkage groove 72, the linkage mechanism 6 also includes a drive capacitor 63, the micro switch 61 and the drive capacitor 63 are both fixed on the support platform 71, and the adjustment assembly 62 is rotatably set on the linkage groove 72.

[0049] The driving capacitor 63 is connected in series in the starting winding circuit. Utilizing the characteristics of the capacitor and the feature that the current phase leads the voltage, an elliptical or nearly circular rotating magnetic field is generated in the air gap of the motor 41. The driving capacitor 63 assists the motor 41 in starting, thereby causing the output shaft of the motor 41 to rotate.

[0050] The worm gear 48 rotates, driving the turbine 65 to rotate, converting the longitudinal rotational force into the axial rotational force. The support platform 71 is used to support and fix the position of the linkage mechanism 6.

[0051] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A valve actuator for precisely adjusting the stroke, characterized in that: The system includes a linkage mechanism (6) and a transmission mechanism (4) disposed below the linkage mechanism (6). Both the linkage mechanism (6) and the transmission mechanism (4) are installed in a mounting assembly (3). A support assembly (7) is also installed on the mounting assembly (3). The linkage mechanism (6) includes a micro switch (61) and an adjustment assembly (62). A linkage shaft (64) is installed below the adjustment assembly (62). A turbine (65) is sleeved on the linkage shaft (64). The adjustment assembly (62) is fixed on the support assembly (7). The adjustment assembly (62) includes a fixing block (622). An adjustment disc (621) is installed above the fixing block (622). The adjustment assembly (62) also includes a first adjustment rod (623) and a second adjustment rod (625) rotatably disposed in the middle of the fixing block (622). The adjusting plate (621) is provided with through holes that are adapted to the first adjusting rod (623) and the second adjusting rod (625). The first adjusting rod (623) and the second adjusting rod (625) are provided with adapted adjusting platforms (629). The first adjusting rod (623) is provided with a first adjusting tooth (624) near the fixed block (622). The second adjusting rod (625) is provided with a second adjusting tooth (626) near the adjusting platform (629). The adjusting platform (629) is provided with a first stroke stop (627) and a second stroke stop (628) in sequence. The first stroke stop (627) is adapted to the first adjusting tooth (624), and the second stroke stop (628) is adapted to the second adjusting tooth (626). The transmission mechanism (4) provides transmission power to the adjusting assembly (62).

2. A valve actuator for precisely adjusting stroke according to claim 1, characterized in that: There are four micro switches (61), and two micro switches (61) are grouped together to correspond to the first stroke stop (627) and the second stroke stop (628) respectively.

3. A valve actuator for precisely adjusting stroke according to claim 1, characterized in that: Both the first stroke stop (627) and the second stroke stop (628) are provided with toothed rings. The internal teeth of the first stroke stop (627) mesh with the first adjusting tooth (624), and the internal teeth of the second stroke stop (628) mesh with the second adjusting tooth (626).

4. A valve actuator for precisely adjusting stroke according to claim 1, characterized in that: The support component (7) includes a support platform (71), on which a linkage groove (72) is provided. The linkage mechanism (6) also includes a driving capacitor (63). The micro switch (61) and the driving capacitor (63) are both fixed on the support platform (71). The adjustment component (62) is rotatably mounted on the linkage groove (72).

5. A valve actuator for precisely adjusting stroke according to claim 1, characterized in that: The valve actuator for precise stroke adjustment also includes a drive cover (2) disposed above the mounting assembly (3) and an adjustment cover (1) disposed on the side of the mounting assembly (3).

6. A valve actuator for precisely adjusting stroke according to claim 5, characterized in that: The mounting assembly (3) includes a valve housing (31), on which a motor mounting groove (32), a first fixing groove (33), a first transmission groove (34), a second transmission groove (35), a worm groove (36), a second fixing groove (37), and an adjustment groove (38) are respectively provided. The linkage shaft (64) is rotatably disposed in the adjustment groove (38).

7. A valve actuator for precisely adjusting stroke according to claim 6, characterized in that: The transmission mechanism (4) includes a drive motor (41), which is installed in a motor mounting slot (32). A fixing component (5) is installed on the first fixing slot (33). The fixing component (5) includes a first fixing platform (51), which is fixed on the first fixing slot (33). The first fixing platform (51) is provided with an output slot (52) and a positioning slot (53).

8. A valve actuator for precisely adjusting stroke according to claim 7, characterized in that: The output end of the drive motor (41) passes through the output slot (52). A first transmission tooth (42) is rotatably mounted on the positioning slot (53). The output end of the drive motor (41) meshes with the first transmission tooth (42). A second transmission tooth (43) is rotatably mounted on the first transmission slot (34). A first driven tooth (44) is mounted on the second transmission tooth (43). The second transmission tooth (43) meshes with the first transmission tooth (42).

9. A valve actuator for precisely adjusting stroke according to claim 8, characterized in that: A third transmission tooth (45) is rotatably mounted on the second transmission groove (35). The third transmission tooth (45) meshes with the first driven tooth (44). A second driven tooth (46) is mounted below the third transmission tooth (45). A worm (48) is rotatably mounted in the worm groove (36). A second fixed platform (54) is mounted on the second fixed groove (37). A fourth transmission tooth (47) is mounted on the output end of the worm (48) through the second fixed platform (54).

10. A valve actuator for precisely adjusting stroke according to claim 9, characterized in that: The second driven tooth (46) meshes with the fourth transmission tooth (47), and the worm (48) meshes with the turbine (65).

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