Valve electric actuator with power-loss automatic mechanical reset function

Abstract

The utility model relates to the technical field of valves, and discloses a valve electric actuator with a power-loss automatic mechanical reset function, which comprises an actuating case and a valve body, the left end of the valve body is fixedly connected with an inlet pipe, the right end of the valve body is fixedly connected with an outlet pipe, the upper surface of the valve body is rotatably connected with a valve shaft, and the valve shaft is fixedly connected with the valve body. A driven shaft is rotatably connected to the inner bottom surface of the execution case, a worm gear is fixedly connected to the top end of the driven shaft, a motor is fixedly connected to the upper surface of the execution case, a driving shaft is fixedly connected to the output end of the motor, and a driving bevel gear is fixedly connected to the bottom end of the driving shaft; supporting long pins are rotationally connected to the front inner wall and the rear inner wall of the execution case, and a worm is fixedly connected between the supporting long pins on the front side and the rear side. According to the valve electric actuator with the power-loss automatic mechanical reset function, the valve body can be opened or closed through the motor, and when the motor cannot work after power failure, the opened valve body can be automatically reset and closed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve electric actuator with an automatic mechanical resetting function when power is lost. Background Art

[0002] The valve is a control component in the fluid delivery system, which has the functions of shutting off, regulating, guiding, preventing backflow, stabilizing pressure, diverting or overflowing pressure relief;

[0003] Most existing valves have the function of electric control switches, but when danger occurs in some specific situations, there may be a power outage, so it is very likely that the valve cannot be closed in time. When the power is off, it needs to be closed manually, which increases personal danger and reduces the active safety of the valve when it is used. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a valve electric actuator with an automatic mechanical reset function when power is lost, which solves the problem that the valve is inconvenient to close automatically when power is off. In order to achieve the purpose of facilitating the automatic closing of the above-mentioned valve when power is off, the utility model provides the following technical solutions: an electric valve actuator with an automatic mechanical reset function when power is lost, comprising an actuator chassis and a valve body, the left end of the valve body is fixedly connected to an inlet pipe, the right end of the valve body is fixedly connected to an outlet pipe, the upper surface of the valve body is rotatably connected to a valve shaft, the inner bottom surface of the actuator chassis is rotatably connected to a driven shaft, the top end of the driven shaft is fixedly connected to a worm gear, the upper surface of the actuator chassis is fixedly connected to a motor, the output end of the motor is located inside the actuator chassis and is fixedly connected to a drive shaft, the bottom end of the drive shaft is fixedly connected to a drive bevel gear, the front and rear inner walls of the actuator chassis are rotatably connected to support long pins, and a worm is fixedly connected between the front and rear support long pins;

[0005] The end face of the worm is fixedly connected with a driven bevel tooth, the supporting long pin is fixedly connected with a worm spring, the surface of the driving shaft is fixedly connected with a gear ring, the left inner wall of the actuator chassis is fixedly connected with a front L-shaped rod, the right inner wall of the actuator chassis is fixedly connected with a rear L-shaped rod, the end face of the front L-shaped rod is slidably connected with a front tooth rod, the end face of the rear L-shaped rod is slidably connected with a rear tooth rod, and straight springs are sleeved on the front L-shaped rod and the rear L-shaped rod.

[0006] Preferably, one end of the straight spring on one side of the front L-shaped rod is fixedly connected to the front gear rod, and the other end is fixedly connected to the front L-shaped rod; one end of the straight spring on one side of the rear L-shaped rod is fixedly connected to the rear gear rod, and the other end is fixedly connected to the rear L-shaped rod.

[0007] Preferably, the front gear rod and the rear gear rod are located at the front and rear sides of the gear ring, the front gear rod and the rear gear rod are meshed with the gear ring, and the driving bevel gear is meshed with the driven bevel gear.

[0008] Preferably, one end of the scroll spring is fixedly connected to the actuator housing, and the other end of the scroll spring is fixedly connected to the support long pin, and the support long pin is rotatably connected to the actuator housing.

[0009] Preferably, the worm is meshed with the worm gear, and the valve shaft is fixedly connected to the driven shaft.

[0010] Preferably, a valve plate is arranged inside the valve body, and the bottom end of the valve shaft extends into the valve body and is fixedly connected to the valve plate.

[0011] Compared with the prior art, the present utility model provides a valve electric actuator with a power-off automatic mechanical reset function, and has the following beneficial effects:

[0012] 1. For the valve electric actuator with a power-off automatic mechanical reset function, during the rotation of the drive shaft, the toothed ring can be driven to rotate. Through the meshing with the front and rear toothed rods on both sides of the toothed ring, the front and rear toothed rods can move in opposite directions, and the front and rear toothed rods can compress the straight springs on their respective sides. The support long pin can drive the scroll spring to contract. Therefore, when the motor is powered off, the straight spring can drive the front and rear toothed rods to reset, and the front and rear toothed rods can drive the drive shaft to rotate in the opposite direction through the meshing with the toothed ring. Moreover, the expansion of the scroll spring can make the support long pin drive the worm to rotate in the opposite direction. Therefore, the worm can drive the worm gear to rotate in the opposite direction, and then through the driven shaft and the valve shaft, the valve plate arranged inside the valve body can be driven to rotate in the opposite direction, so that the valve body can be closed.

[0013] 2. For the valve electric actuator with a power-off automatic mechanical reset function, when the worm rotates forward or backward, the worm gear can be driven to rotate forward or backward. Therefore, the worm gear can drive the valve plate arranged inside the valve body to rotate forward or backward through the driven shaft and the valve shaft, so that the valve body can be opened or closed. And when the valve plate is subjected to the impact force of the fluid inside the valve body, since the worm gear cannot drive the worm to rotate, the valve plate can be made more firm and stable when closing the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a partial cross-sectional view of the actuator housing of the structure of the present utility model;

[0016] Figure 3 is a combined diagram of the worm gear and the worm of the structure of the present utility model;

[0017] Figure 4 is the present utility model Figure 3 Partial enlarged schematic view of the structure at A in.

[0018] Wherein: 1. Execution chassis; 2. Valve body; 3. Inlet pipe; 4. Outlet pipe; 5. Valve shaft; 6. Driven shaft; 7. Worm gear; 8. Motor; 9. Driving shaft; 10. Driving bevel gear; 11. Supporting long pin; 12. Worm; 13. Driven bevel gear; 14. Worm spring; 15. Tooth ring; 16. Front L-shaped rod; 17. Rear L-shaped rod; 18. Front tooth rod; 19. Rear tooth rod; 20. Straight spring. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Please refer to Figures 1-4 , the present invention provides a valve electric actuator with a power-off automatic mechanical reset function, including an execution chassis 1 and a valve body 2. The left end of the valve body 2 is fixedly connected with an inlet pipe 3, the right end of the valve body 2 is fixedly connected with an outlet pipe 4, the upper surface of the valve body 2 is rotatably connected with a valve shaft 5, the inner bottom surface of the execution chassis 1 is rotatably connected with a driven shaft 6, the top end of the driven shaft 6 is fixedly connected with a worm gear 7, the upper surface of the execution chassis 1 is fixedly connected with a motor 8, the output end of the motor 8 and located inside the execution chassis 1 is fixedly connected with a driving shaft 9, the bottom end of the driving shaft 9 is fixedly connected with a driving bevel gear 10, the front and rear inner walls of the execution chassis 1 are rotatably connected with a supporting long pin 11, and a worm 12 is fixedly connected between the front and rear supporting long pins 11;

[0021] The end face of the worm 12 is fixedly connected with a driven bevel gear 13, a worm spring 14 is fixedly connected to the supporting long pin 11, a tooth ring 15 is fixedly connected to the surface of the driving shaft 9, a front L-shaped rod 16 is fixedly connected to the left inner wall of the execution chassis 1, a rear L-shaped rod 17 is fixedly connected to the right inner wall of the execution chassis 1, the end face of the front L-shaped rod 16 is slidably connected with a front tooth rod 18, the end face of the rear L-shaped rod 17 is slidably connected with a rear tooth rod 19, and a straight spring 20 is sleeved on the front L-shaped rod 16 and the rear L-shaped rod 17. By connecting the inlet pipe 3 and the outlet pipe 4 to the external pipeline, and the motor 8 can drive the driving shaft 9 to rotate, and the worm 12 can be driven to rotate through the meshing of the driving bevel gear 10 and the driven bevel gear 13. Furthermore, the worm 12 can drive the worm gear 7 to rotate, and the worm gear 7 can drive the valve plate arranged inside the valve body 2 to rotate through the driven shaft 6 and the valve shaft 5, so as to open the valve body 2.

[0022] Furthermore, one end of the straight spring 20 on one side of the front L-shaped rod 16 is fixedly connected to the front rack 18, and the other end is fixedly connected to the front L-shaped rod 16. One end of the straight spring 20 on one side of the rear L-shaped rod 17 is fixedly connected to the rear rack 19, and the other end is fixedly connected to the rear L-shaped rod 17. That is, the front L-shaped rod 16, the front rack 18, and the straight spring 20 at this position form a front spring telescopic rod, and the rear L-shaped rod 17, the rear rack 19, and the straight spring 20 at this position form a rear spring telescopic rod. So that through the spring telescopic rods on the front and rear sides, the rotated drive shaft 9 can be reset.

[0023] Furthermore, the front rack 18 and the rear rack 19 are located on the front and rear sides of the gear ring 15. The front rack 18 and the rear rack 19 are meshed with the gear ring 15, and the driving bevel gear 10 is meshed with the driven bevel gear 13. When the gear ring 15 rotates, it can drive the front rack 18 and the rear rack 19 to move in the opposite direction. Therefore, when the front rack 18 and the rear rack 19 move in the opposite direction, the straight springs 20 on both sides can be compressed. Therefore, when the motor 8 is powered off, the drive shaft 9 can also be rotated through the reset of the straight spring 20.

[0024] Furthermore, one end of the scroll spring 14 is fixedly connected to the actuator housing 1, and the other end of the scroll spring 14 is fixedly connected to the support long pin 11. The support long pin 11 is rotatably connected to the actuator housing 1. When the worm 12 drives the support long pin 11 to rotate, at this time, the support long pin 11 can drive the scroll spring 14 to stretch or contract and deform. Therefore, when the motor 8 is powered off, at this time, the reset of the scroll spring 14 can also drive the worm 12 to rotate in the opposite direction to close the valve body 2.

[0025] Furthermore, the worm 12 is meshed with the worm gear 7, and the valve shaft 5 is fixedly connected to the driven shaft 6. The worm 12 can drive the worm gear 7 to rotate, and the worm gear 7 can drive the valve plate arranged inside the valve body 2 to rotate through the valve shaft 5 and the driven shaft 6 to close the valve body 2. And after the valve body 2 is closed, since the worm gear 7 cannot drive the worm 12 to rotate, when the valve plate is subjected to an impact force, the valve plate will not be opened either.

[0026] Furthermore, a valve plate is arranged inside the valve body 2. The bottom end of the valve shaft 5 extends into the valve body 2 and is fixedly connected to the valve plate. When the worm gear 7 rotates, the valve shaft 5 can be driven to rotate through the driven shaft 6, and then the valve shaft 5 can drive the valve plate to rotate to open or close the valve body 2.

[0027] In use, by connecting the inlet pipe 3 and the outlet pipe 4 to external pipes, the motor 8 can drive the drive shaft 9 to rotate, and through the engagement of the driving bevel gear 10 and the driven bevel gear 13, the worm 12 can be driven to rotate. Furthermore, the worm 12 can drive the worm wheel 7 to rotate, and the worm wheel 7 can drive the valve plate arranged inside the valve body 2 to rotate through the driven shaft 6 and the valve shaft 5, thereby opening the valve body 2. And during the rotation of the drive shaft 9, the toothed ring 15 can be driven to rotate. Through the engagement of the toothed ring 15 with the front tooth rod 18 and the rear tooth rod 19 on both sides thereof, the front tooth rod 18 and the rear tooth rod 19 can move in opposite directions, and the front tooth rod 18 and the rear tooth rod 19 can compress the straight springs 20 on their respective sides. When the worm 12 rotates, the support long pin 11 can be driven to rotate, and the support long pin 11 can drive the spiral spring 14 to contract. Therefore, when the motor 8 is powered off, at this time the straight springs 20 are no longer stressed and reset. Therefore, the straight springs 20 can drive the front tooth rod 18 and the rear tooth rod 19 to reset, and the front tooth rod 18 and the rear tooth rod 19 can drive the drive shaft 9 to rotate in the opposite direction through the engagement with the toothed ring 15, the driving bevel gear 10 and the driven bevel gear 13 rotate in the opposite direction, and the expansion of the spiral spring 14 can make the support long pin 11 drive the worm 12 to rotate in the opposite direction. Therefore, the worm 12 can drive the worm wheel 7 to rotate in the opposite direction. Furthermore, the worm wheel 7 can drive the valve plate arranged inside the valve body 2 to rotate in the opposite direction through the driven shaft 6 and the valve shaft 5. Therefore, the valve body 2 can be closed. Furthermore, when the motor 8 is powered off, the valve body 2 can also be closed.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve electric actuator with an automatic mechanical reset function upon power failure, comprising an actuator chassis (1) and a valve body (2), characterized in that: The left end of the valve body (2) is fixedly connected to an inlet pipe (3), the right end of the valve body (2) is fixedly connected to an outlet pipe (4), the upper surface of the valve body (2) is rotatably connected to a valve shaft (5), the inner bottom surface of the actuator case (1) is rotatably connected to a driven shaft (6), the top end of the driven shaft (6) is fixedly connected to a worm gear (7), the upper surface of the actuator case (1) is fixedly connected to a motor (8), the output end of the motor (8) is located inside the actuator case (1) and is fixedly connected to a drive shaft (9), the bottom end of the drive shaft (9) is fixedly connected to a drive bevel gear (10), the front and rear inner walls of the actuator case (1) are rotatably connected to support long pins (11), and a worm (12) is fixedly connected between the front and rear support long pins (11); The end surface of the worm (12) is fixedly connected to a driven bevel tooth (13), the supporting long pin (11) is fixedly connected to a worm spring (14), the surface of the drive shaft (9) is fixedly connected to a toothed ring (15), the left inner wall of the actuator case (1) is fixedly connected to a front L-shaped rod (16), the right inner wall of the actuator case (1) is fixedly connected to a rear L-shaped rod (17), the end surface of the front L-shaped rod (16) is slidably connected to a front toothed rod (18), the end surface of the rear L-shaped rod (17) is slidably connected to a rear toothed rod (19), and a straight spring (20) is sleeved on the front L-shaped rod (16) and the rear L-shaped rod (17).

2. The valve electric actuator with automatic mechanical reset function in case of power failure according to claim 1, characterized in that: One end of the straight spring (20) on one side of the front L-shaped rod (16) is fixedly connected to the front gear rod (18), and the other end is fixedly connected to the front L-shaped rod (16); one end of the straight spring (20) on one side of the rear L-shaped rod (17) is fixedly connected to the rear gear rod (19), and the other end is fixedly connected to the rear L-shaped rod (17).

3. The valve electric actuator with automatic mechanical reset function in case of power failure according to claim 1, characterized in that: The front gear rod (18) and the rear gear rod (19) are located at the front and rear sides of the gear ring (15); the front gear rod (18) and the rear gear rod (19) are meshed with the gear ring (15); and the driving bevel gear (10) is meshed with the driven bevel gear (13).

4. The valve electric actuator with automatic mechanical reset function in case of power failure according to claim 1, characterized in that: One end of the worm spring (14) is fixedly connected to the actuator chassis (1), and the other end of the worm spring (14) is fixedly connected to the long support pin (11), and the long support pin (11) is rotatably connected to the actuator chassis (1).

5. The valve electric actuator with automatic mechanical reset function in case of power failure according to claim 1, characterized in that: The worm (12) is meshed with the worm wheel (7), and the valve shaft (5) is fixedly connected to the driven shaft (6).

6. The valve electric actuator with automatic mechanical reset function in case of power failure according to claim 1, characterized in that: A valve plate is arranged inside the valve body (2), and the bottom end of the valve shaft (5) extends into the interior of the valve body (2) and is fixedly connected to the valve plate.

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