Valve actuator with power-off auto reset

Abstract

The application discloses a valve actuator with automatic reset after power failure in the field of valve actuators, which comprises a casing, a rotating driving element fixedly connected to the casing, an output shaft of the rotating driving element, a main shaft coaxially fixedly connected to the output shaft, a limiter arranged on the main shaft, a first partition fixedly connected to the casing, an extension rod coaxially fixedly connected to the main shaft after the main shaft penetrating through the first partition, a torsional spring sleeved on the main shaft, one end of the torsional spring fixedly connected to the first partition, an extension driving element arranged on the first partition, a second partition fixedly connected to the casing, the extension rod coaxially fixedly connected to a first rotary disc after the extension rod penetrating through the second partition, a butt joint column arranged at the bottom of the first rotary disc, a mounting shaft rotatably connected to the bottom of the casing, a second rotary disc coaxially fixedly connected to the top of the mounting shaft, and a butt joint groove arranged on the second rotary disc and matched with the butt joint column. The technical scheme of the application can continue to complete the rotating action and then self-lock when the valve executes the rotating action and power failure occurs.

Description

Technical Field

[0001] This invention belongs to the field of valve actuators, specifically a valve actuator device with automatic reset upon power failure. Background Technology

[0002] Valve actuators are installed on pipelines and receive control signals from control systems or remote controls to automatically open and close valves. They can also adjust the valve opening to regulate the flow rate. Normally, the control system automatically controls the valve opening based on changes in pipeline flow. However, in certain operating environments, in the event of a power outage, the valve needs to be either closed or fully open for safety.

[0003] In existing technologies, the valve plate is reset by triggering an energy storage mechanism when the power is off, causing it to rotate in a preset direction. However, there are special cases, such as when the power is off during the valve's rotation. In this case, the valve loses its driving force and triggers the reset, causing the valve to forcibly return to the preset reset state instead of completing the rotation action, which goes against the user's wishes. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a valve actuator with automatic reset upon power failure, which can continue to complete the rotation action and then self-lock when power is lost during valve rotation.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A valve actuator with automatic reset upon power failure includes a housing, a rotating drive component fixedly connected to the housing, a main shaft fixedly connected to the output shaft of the rotating drive component, and a limiter provided on the main shaft for limiting the rotation range of the main shaft to 90°.

[0006] A first partition is fixedly connected inside the housing. After the main shaft passes through the first partition, a telescopic rod is coaxially fixedly connected. A torsion spring is sleeved on the main shaft. One end of the torsion spring is fixedly connected to the first partition. A telescopic drive is provided on the first partition. The telescopic drive is used to drive the telescopic rod to extend and retract. The telescopic drive extends when the power is off and retracts when the power is on.

[0007] A second partition is fixedly connected inside the casing. After the telescopic rod passes through the second partition, it is coaxially fixedly connected to the first turntable. The bottom of the first turntable is provided with a docking post and the first turntable is provided with a first self-locking structure.

[0008] The bottom of the housing is rotatably connected to an installation shaft, and the top of the installation shaft is coaxially fixedly connected to a second turntable. The second turntable has four evenly distributed docking slots that mate with the docking posts. The second turntable is equipped with a second self-locking structure, which is used to lock the second turntable after the docking posts leave the docking slots.

[0009] The above scheme achieves the following beneficial effects: It is suitable for rotary valves, where the valve plate switches the opening and closing of the pipeline by rotation. The mounting shaft is used to mount the valve plate and drive its rotation. The rotation drive component provides kinetic energy, and the torsion spring stores energy for the rotation. After energy storage, the first self-locking structure of the first turntable locks the valve in the energy-storing state.

[0010] When it is necessary to control the valve to switch the pipeline open and closed states, the rotary drive is not activated; instead, the power to the telescopic drive is disconnected, causing it to extend. After extension, the telescopic drive drives the first turntable connected to the telescopic rod downwards. The mating post of the first turntable inserts into the mating groove of the second turntable, releasing the torsion spring. This causes the first turntable to rotate the second turntable, which in turn rotates the mounting shaft, switching the pipeline state. Subsequently, the telescopic drive is powered on, causing the first turntable to rise, the second turntable to self-lock, and the rotary drive is activated again to store energy in the torsion spring. During this process, the actions are driven by both the de-energization of the telescopic drive and the torsion spring, requiring no electrical energy. Therefore, even if a power outage occurs during this process, the action will continue.

[0011] The limiter restricts the rotation value to 90° each time, so each time the torsion spring is released, it will complete a 90° stroke, so that the first turntable and the second turntable rotate 90° as one action. The second turntable is provided with 4 docking slots that cooperate with the docking post, ensuring that the docking post can fall into the docking slot each time the first turntable is lowered.

[0012] When power is cut off before the pipeline switching action is performed, it is equivalent to triggering the telescopic drive to cut off power and perform a reset operation.

[0013] Furthermore, the rotation drive includes a motor, which is equipped with a reducer for enhancing torque.

[0014] Beneficial effects: The speed reducer can enhance torque and improve rotational efficiency.

[0015] Furthermore, the reducer is a planetary reducer.

[0016] Beneficial effects: Planetary reducers can output slower but higher torque rotational motion on the same axis.

[0017] Furthermore, the telescopic drive includes a base, a first elastic element is fixedly connected to the base, an output plate is fixedly connected to the end of the elastic element away from the base, the output plate is fixedly connected to the telescopic rod, an electromagnet is provided on the base, and a metal plate is provided on the output plate.

[0018] Beneficial effects: When the electromagnet is energized, it attracts the metal plate, causing the metal plate to approach the base and retract; when the electromagnet is de-energized, the magnetic force disappears, and the output plate is pushed out by the first elastic element to complete the elongation motion.

[0019] Furthermore, the first self-locking structure includes an elastic telescopic top rod located on the second partition plate. The first turntable is provided with a first slot, and the elastic telescopic top rod cooperates with the first slot. After the first turntable is lowered, it disengages from the elastic telescopic top rod.

[0020] Beneficial effects: During the torsion spring charging process, the first turntable rotates to the starting position of the limiter. At this point, the first slot aligns with the elastic telescopic rod, which then extends, locking the first turntable. After the first turntable descends, it disengages from the elastic telescopic rod and begins to rotate. During the subsequent ascent, since the first turntable has already rotated 90° under the influence of the torsion spring, the elastic telescopic rod will not align with the first slot but will be pressed back by the first turntable.

[0021] Furthermore, the second self-locking structure includes a U-shaped pressure rod, which is installed at the bottom of the housing. The side of the U-shaped pressure rod closer to the second turntable is lower than the side farther from the second turntable. The side of the U-shaped pressure rod closer to the second turntable is located at the bottom of the second turntable. A second slot is provided on the second turntable, which cooperates with the side of the U-shaped pressure rod closer to the second turntable. An elastic element is provided at the bottom of the U-shaped pressure rod.

[0022] Beneficial effects: When the first turntable descends, it presses down on the U-shaped lever. Through a linkage effect, the U-shaped lever, which was originally locked in the second slot, falls out, and the second turntable is not locked, thus rotating with the first turntable. After the first turntable is raised, the second elastic element rebounds, causing the U-shaped lever to lock back into the second slot, locking the first turntable.

[0023] Furthermore, the number and position of the docking posts correspond to the docking slots.

[0024] Beneficial effects: The addition of butt joints increases the detection surface during contact and improves structural strength.

[0025] Furthermore, the mounting shaft is equipped with a ratchet for limiting the direction of rotation.

[0026] Beneficial effects: When power is off, although the mating column and mating groove cooperate to constrain the mounting shaft by the rotation drive or limiter, the fluid in the pipeline may impact the valve plate, causing the mounting shaft to rotate in the opposite direction, thereby disrupting the valve's open / closed state. Therefore, the rotation drive needs to be self-locking. The ratchet, however, can constrain the rotation direction of the mounting shaft, locking it in place by the limiter and ratchet, preventing arbitrary rotation and providing greater stability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first turntable in its descending state.

[0028] Figure 2 for Figure 1 A schematic diagram of the first card slot in the middle.

[0029] Figure 3 This is a schematic diagram of the first turntable in its raised state.

[0030] Figure 4 for Figure 1 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0031] The following detailed description illustrates the specific implementation method:

[0032] The reference numerals in the accompanying drawings of the instruction manual include: housing 1, rotation drive component 2, main shaft 3, limiter 4, first partition 5, telescopic rod 6, torsion spring 7, telescopic drive component 8, second partition 9, first turntable 10, docking post 11, docking groove 12, second turntable 13, motor 14, reducer 15, base 16, first elastic element 17, output plate 18, electromagnet 19, elastic telescopic top rod 20, first slot 21, U-shaped pressure rod 22, second slot 23, ratchet 24.

[0033] Example 1

[0034] The basic implementation examples are as follows: Figure 1 To be continued Figure 4 As shown:

[0035] A valve actuator with automatic reset upon power failure includes a housing 1, a rotary drive 2 fixed to the housing 1 with screws, a main shaft 3 coaxially mounted on the output shaft of the rotary drive 2, and a limiter 4 mounted on the main shaft 3 to limit the rotation range of the main shaft 3 to 90°.

[0036] The first partition 5 is fixed inside the housing 1 with screws. The main shaft 3 passes through the first partition 5 and is coaxially mounted with a telescopic rod 6. A torsion spring 7 is sleeved on the main shaft 3. One end of the torsion spring 7 is fixedly connected to the first partition 5. A telescopic drive 8 is installed on the first partition 5. The telescopic drive 8 is used to drive the telescopic rod 6 to extend and retract. The telescopic drive 8 extends when the power is off and retracts when the power is on.

[0037] A second partition 9 is fixedly connected inside the housing 1. After the telescopic rod 6 passes through the second partition 9, a first turntable 10 is coaxially welded to it. A docking column 11 is welded to the bottom of the first turntable 10. The first turntable 10 is equipped with a first self-locking structure.

[0038] The bottom of the housing 1 is rotatably connected to an installation shaft, and a second turntable 13 is coaxially welded to the top of the installation shaft. The second turntable 13 has four docking grooves 12 that mate with the docking post 11 evenly distributed around its circumference. The second turntable 13 is provided with a second self-locking structure, which is used to lock the second turntable 13 after the docking post 11 leaves the docking groove 12.

[0039] The specific implementation process is as follows: Applicable to rotary valves, the valve plate switches the opening and closing of the pipeline by rotation. The mounting shaft is used to mount the valve plate and drive the valve plate. The rotation drive component 2 is used to provide kinetic energy, and the torsion spring 7 can store energy for rotation. After energy storage, it is locked by the first self-locking structure of the first turntable 10 to maintain the energy storage state.

[0040] When it is necessary to control the valve to switch the pipeline opening and closing state, the rotary drive 2 is not activated. Instead, the power to the telescopic drive 8 is disconnected, causing it to extend. After the telescopic drive 8 extends, it drives the first turntable 10 connected to the telescopic rod 6 downward. After the docking post 11 of the first turntable 10 inserts into the docking groove 12 of the second turntable 13, the torsion spring 7 is released, causing the first turntable 10 to drive the second turntable 13 to rotate. The second turntable 13 will cause the mounting shaft to rotate, switching the pipeline state. Subsequently, the telescopic drive 8 is energized, causing the first turntable 10 to rise, the second turntable 13 to self-lock, and the rotary drive 2 is activated again to store energy in the torsion spring 7. During this process, the action is driven by the de-energization of the telescopic drive 8 and the torsion spring 7, respectively, without the need for electrical energy. Therefore, even if a power outage occurs during this process, the action will continue to be completed.

[0041] Limiter 4 limits the rotation value to 90° each time, so each time the torsion spring 7 is released, it will complete a 90° stroke, so that the first turntable 10 and the second turntable 13 rotate 90° as one action. The second turntable 13 is provided with 4 docking slots 12 that cooperate with the docking post 11, ensuring that each time the first turntable 10 is lowered, the docking post 11 can fall into the docking slot 12.

[0042] When power is cut off before the pipeline switching action is performed, it is equivalent to triggering the telescopic drive 8 to cut off power and perform a reset operation.

[0043] Example 2

[0044] The difference from the above embodiment is that the rotation drive 2 includes a motor 14, the motor 14 is a Shunbao DC6V, and the motor 14 is equipped with a reducer 15 for enhancing torque.

[0045] The specific implementation process is as follows: Reducer 15 can enhance torque and improve rotational efficiency.

[0046] Example 3

[0047] The difference from the above embodiment is that the reducer 15 is a planetary reducer 15.

[0048] The specific implementation process is as follows: Planetary reducer 15 can output rotational motion with a slower speed but greater torque on the same axis.

[0049] Example 4

[0050] The difference from the above embodiment is that: the telescopic drive component 8 includes a base 16, a first elastic element 17 is welded to the base 16, an output plate 18 is welded to the end of the elastic element away from the base 16, the output plate 18 is welded and fixed to the telescopic rod 6, an electromagnet 19 is provided on the base 16, the electromagnet 19 is model ELE-P25, and a metal plate is installed on the output plate 18.

[0051] The specific implementation process is as follows: When the electromagnet 19 is energized, it will attract the metal plate, causing the metal plate to approach the base 16 and complete the contraction; when the electromagnet 19 is de-energized, the magnetic force disappears, and the output plate 18 is pushed out under the action of the first elastic element 17 to complete the elongation movement.

[0052] Example 5

[0053] The difference from the above embodiment is that: the first self-locking structure includes an elastic telescopic top rod 20, the elastic telescopic top rod 20 is located on the second partition plate 9, the first turntable 10 is provided with a first slot 21, the elastic telescopic top rod 20 cooperates with the first slot 21, and the first turntable 10 disengages from the elastic telescopic top rod 20 after it is lowered.

[0054] The specific implementation process is as follows: When the torsion spring 7 is charging, the first turntable 10 will rotate to the starting position of the limiter 4. At this time, the first slot 21 is aligned with the elastic telescopic rod 20, and the elastic telescopic rod 20 will push out, thereby locking the first turntable 10. After the first turntable 10 descends, it disengages from the elastic telescopic rod 20, and the first turntable 10 begins to rotate. During the subsequent upward process, since the first turntable 10 has already rotated 90° under the drive of the torsion spring 7, the elastic telescopic rod 20 will not be aligned with the first slot 21, but will be pressed back by the first turntable 10.

[0055] Example 6

[0056] The difference from the above embodiment is that the second self-locking structure includes a U-shaped pressure rod 22, which is installed at the bottom of the housing 1. The side of the U-shaped pressure rod 22 near the second turntable 13 is lower than the side away from the second turntable 13. The side of the U-shaped pressure rod 22 near the second turntable 13 is located at the bottom of the second turntable 13. A second slot 23 is provided on the second turntable 13. The second slot 23 cooperates with the side of the U-shaped pressure rod 22 near the second turntable 13. An elastic element is provided at the bottom of the U-shaped pressure rod 22.

[0057] The specific implementation process is as follows: When the first turntable 10 is lowered, it presses down the U-shaped pressure rod 22. Through the linkage effect, the U-shaped pressure rod 22, which was originally stuck in the second slot 23, is dislodged, and the second turntable 13 is not locked, thus rotating with the first turntable 10. After the first turntable 10 is raised, the second elastic element rebounds, causing the U-shaped pressure rod 22 to be stuck back into the second slot 23, locking the first turntable 10.

[0058] Example 7

[0059] The difference from the above embodiment is that the number and position of the docking posts 11 correspond to the docking grooves 12.

[0060] The specific implementation process is as follows: The addition of the docking column 11 can increase the detection surface during contact and improve the structural strength.

[0061] Example 8

[0062] The difference from the above embodiment is that the mounting shaft is provided with a ratchet 24 for limiting the direction of rotation.

[0063] The specific implementation process is as follows: When the power is off, although the docking column 11 and the docking groove 12 cooperate to constrain the mounting shaft by the rotation drive 2 or the limiter 4, the fluid in the pipeline may impact the valve plate, causing the mounting shaft to rotate in the opposite direction, thereby disrupting the valve's opening and closing state. Therefore, the rotation drive 2 needs to be self-locking. The ratchet 24 can constrain the rotation direction of the mounting shaft, keeping it locked by the limiter 4 and the ratchet 24, preventing it from rotating in any direction and providing greater stability.

[0064] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A valve actuator with automatic reset upon power failure, characterized in that: Includes a housing, on which a rotary drive component is fixedly connected. The output shaft of the rotary drive component is coaxially fixedly connected to a main shaft. The main shaft is equipped with a limiter, which limits the rotation range of the main shaft to 90°. A first partition is fixedly connected inside the housing. After the main shaft passes through the first partition, a telescopic rod is coaxially fixedly connected. A torsion spring is sleeved on the main shaft. One end of the torsion spring is fixedly connected to the first partition. A telescopic drive is provided on the first partition. The telescopic drive is used to drive the telescopic rod to extend and retract. The telescopic drive extends when the power is off and retracts when the power is on. A second partition is fixedly connected inside the housing. After the telescopic rod passes through the second partition, it is coaxially fixedly connected to the first turntable. The bottom of the first turntable is provided with a docking post. The first turntable is provided with a first self-locking structure. The first self-locking structure includes an elastic telescopic top rod. The elastic telescopic top rod is located on the second partition. The first turntable is provided with a first slot. The elastic telescopic top rod cooperates with the first slot. After the first turntable is lowered, it disengages from the elastic telescopic top rod. A mounting shaft is rotatably connected to the bottom of the housing. A second turntable is coaxially fixedly connected to the top of the mounting shaft. The second turntable has four evenly distributed docking slots around its circumference that mate with the docking posts. The second turntable is equipped with a second self-locking structure, which locks the second turntable after the docking posts leave the docking slots. The second self-locking structure includes a U-shaped pressure rod, which is installed at the bottom of the housing. The side of the U-shaped pressure rod closer to the second turntable is lower than the side farther away from the second turntable. The side of the U-shaped pressure rod closer to the second turntable is located at the bottom of the second turntable. The second turntable has four second slots, which mate with the side of the U-shaped pressure rod closer to the second turntable. A second elastic element is provided at the bottom of the U-shaped pressure rod. The valve plate switches the opening and closing of the pipeline by rotation. The mounting shaft is used to install the valve plate and drive the valve plate. The rotation drive component is used to provide kinetic energy. The torsion spring can store energy for rotation. After energy storage, it is locked by the first self-locking structure of the first turntable to keep it in the energy storage state. When it is necessary to control the valve to switch the pipeline opening and closing state, the rotary drive is not activated. Instead, the power to the telescopic drive is disconnected, causing it to extend. After the telescopic drive extends, it will drive the first turntable connected to the telescopic rod downward. After the docking post of the first turntable inserts into the docking groove of the second turntable, the torsion spring is released, causing the first turntable to drive the second turntable to rotate. The second turntable will cause the mounting shaft to rotate, switching the pipeline state. Then, the telescopic drive is powered on, causing the first turntable to rise, the second turntable to self-lock, and the rotary drive is activated again to store energy in the torsion spring.

2. The valve actuator with automatic reset upon power failure according to claim 1, characterized in that: The rotational drive includes a motor, which is equipped with a speed reducer to enhance torque.

3. The valve actuator with automatic reset upon power failure according to claim 2, characterized in that: The reducer is a planetary reducer.

4. The valve actuator with automatic reset upon power failure according to claim 3, characterized in that: The telescopic drive includes a base, a first elastic element fixedly connected to the base, an output plate fixedly connected to the end of the elastic element away from the base, the output plate being fixedly connected to the telescopic rod, an electromagnet being provided on the base, and a metal plate being provided on the output plate.

5. The valve actuator with automatic reset upon power failure according to claim 4, characterized in that: The number and position of the docking posts correspond to the docking slots.

6. The valve actuator with automatic reset upon power failure according to claim 5, characterized in that: The mounting shaft is equipped with a ratchet to limit the direction of rotation.

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