Electric actuator

Abstract

The invention relates to an electric actuator which comprises an electric actuator shell, a control panel with electricity storage and discharge functions and a driving part. A storage and discharge module is arranged on the control panel, when an external power source is connected, the actuator uses electric power provided by the external power source, the electric power is regulated and controlled by the control panel to drive the driving component to work so as to drive the valve to be opened and closed, and meanwhile the external power source is used for charging the storage and discharge module on the control panel to store energy; when the external power supply is switched off, the control panel outputs electric energy, and the driving motor and the gear transmission part work and drive the valve to reset to a preset safe reset position. Compared with a traditional power-losing spring reset product, the super capacitor on the control panel is used as an energy storage medium, the reset position can be adjusted at will, when an external power source is normal, the action of the electric actuator does not need to overcome spring resistance, energy consumption in the working process is saved, the structure of the actuator is more compact, and the service life of the actuator is prolonged. The use is safer and more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of power output, and in particular to an electric actuator. Background Art

[0002] In the fields of mechanical engineering, electrical engineering and automation control, electric actuators are important devices that convert electrical energy into mechanical energy to control various mechanical movements. Electric actuators are usually composed of a housing and a control mechanism, where the control mechanism can include a manual mechanism and an electric mechanism.

[0003] When the main power supply of the existing electric actuator is cut off, the actuator can no longer drive the valve to open and close or adjust the angle. At this time, an emergency power supply is generally connected or the valve is manually operated to ensure the normal use of the valve. This inevitably leads to the need for additional wiring and external power supply to be equipped with the electric actuator, and the timeliness is also poor. In addition, there is a spring reset type actuator in the existing technology that uses a spring to force the valve to move in the full closing direction when the power is off, and the reset position of the spring reset has only two positions, namely the starting position and the end position. In addition, in addition to the load torque of driving the valve, the spring reset type actuator also requires the torque for winding the spring, so the torque required increases exponentially, resulting in increased power consumption. In addition, when the valve is assembled, there is a gap between the actuator and the valve stem, and there is also a gap between the valve stem and the ball, and the ball will have deviations during installation, and the deviations will cause leakage in the closed state. At the same time, because the valve is in a certain position for a long time, the valve will have a problem of increased torque, but the existing technical means cannot detect the increase in torque in time, which leads to the situation that the valve cannot be closed in an emergency, causing serious safety accidents.

[0004] Based on the above problems, the present application proposes an electric actuator. Summary of the invention

[0005] The purpose of the present invention is to provide an electric actuator to solve the above technical problems.

[0006] To achieve the above object, the present invention provides the following technical solutions: An electric actuator, characterized in that it includes an electric actuator housing, a control panel with storage and discharge functions, and a driving component; a storage and discharge module is arranged on the control panel, and when an external power supply is connected, the actuator uses the power provided by the external power supply, and after being regulated by the control panel, drives the driving component to work so as to drive the valve to open and close, and at the same time uses the external power supply to charge and store energy in the storage and discharge module on the control panel; when the external power supply is disconnected, the control panel outputs electric energy by itself, drives the motor and the gear transmission component to work and drives the valve to reset to a preset position.

[0007] The present invention further provides that the storage and discharge module on the control board uses supercapacitors as main power storage components.

[0008] The present invention is further provided that, when the external power supply fails, the safety reset position can be preset according to the actual working condition requirements of each valve.

[0009] An electric actuator, characterized in that it has the above-mentioned control board, and also includes a driving component and a proportional gear assembly. The driving component is used to drive the valve to move, and the proportional gear assembly is used to detect the valve position and feed it back to the control board. The control board adjusts the opening and closing angle of the valve by driving the driving component.

[0010] The present invention is further arranged that the proportional gear assembly is arranged on the driving component, the proportional gear assembly includes an outer cover, a proportional large gear, and a proportional small gear, the proportional large gear is sleeved with an indication shaft, the indication shaft is also linked with the driving component, the proportional small gear is meshed with the proportional large gear, an induction magnet is arranged in the proportional small gear, and a magnetic encoder is arranged above the proportional small gear for receiving the position of the induction magnet, thereby determining the position of the valve.

[0011] The present invention is further provided that the control panel also includes a timing module for timingly driving the electric actuator to operate and drive the valve to rotate in the expectation of changing the current state of the valve.

[0012] The present invention is further arranged that when the current state of the valve fails to change, the valve is in a fault state.

[0013] The present invention is further configured to include a display screen assembly, wherein the display screen assembly is used to display the working parameters of the valve, and function buttons are arranged on the display screen assembly, and the working parameters of the valve are adjusted through the function buttons.

[0014] The present invention is further provided that the display screen assembly includes a display screen, explosion-proof glass and a glass protection cover, a filling step is formed on the side of the glass protection cover close to the explosion-proof glass, the filling step is filled with glue for bonding the explosion-proof glass, wherein the glass protection cover and the explosion-proof glass constitute a sealing structure, and the sealing method is as follows: fix the glass protection cover and the explosion-proof glass, apply glue in the filling step, after the glue solidifies, process the thread of the glass protection cover, process the sealing groove on the end face and place a sealing ring in the sealing groove, and clean the glue on the end face of the explosion-proof glass.

[0015] The present invention further provides that the function keys at least include a switch key.

[0016] The present invention includes at least one of the following beneficial effects: 1-The present invention adopts a storage and discharge module and sets it on the control board of the electric actuator to solve the problem that it cannot be reset in time when the power is cut off. At the same time, the present invention adopts a capacitor reset method and abandons the spring reset solution, which can realize the arbitrariness of the reset position, that is, after the reset position is set in advance, when the power is cut off, the reset is realized through the storage and discharge module, and it can be quickly reset to the preset reset position; when the external power supply is normal, the action of the electric actuator does not need to overcome the spring resistance, which not only saves energy consumption during work, but also makes the structure of the actuator more compact and safer and more stable to use. Moreover, the loss of life of the capacitor reset method is almost negligible, and compared with the mechanical structure, the life is greatly improved.

[0017] 2. The present invention also realizes the detection of valve position by means of a magnetic encoder, and its detection function is reflected in: fine-tuning of the sphere when installing the sphere. Since the sphere needs to be sealed with a seal in the prior art to achieve a leak-free situation, but in actual installation, the installation position of the sphere cannot guarantee perfect matching with the seal. When there is a deviation in matching, leakage problems will be caused. The prior art uses a cam and a micro switch, but the adjustment error is large, and sometimes multiple adjustments are required. Even multiple adjustments may fail. Therefore, the present invention combines a magnetic encoder to adjust the position of the sphere, and the adjustment accuracy is high. In particular, the matching range between the seal and the sphere is only about 5°. Therefore, the magnetic encoder is used to adjust the starting position of the sphere, which can greatly increase the adjustment accuracy and reduce the number of adjustments. The adjustment is more efficient and can ensure the safe operation of the valve. Secondly, when the valve is in a working state for a long time, impurities will appear between the seal and the ball, causing the torque of the valve to increase, but the staff cannot detect the increase in torque in time. In this application, a timing module is set up, and the timing module cooperates with the magnetic encoder and the control board to perform an "online partial stroke test" to diagnose whether the electric actuator and the valve are normal. Since a small angle rotation will not greatly affect the working state of the valve, and at the same time reduce the risk of increased valve torque, especially in the event of an emergency, when the valve needs to be operated, if there is an increase in torque, the valve cannot be turned, which will cause a major accident in serious cases. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is one of the exploded schematic diagrams of an embodiment of the present invention.

[0019] Figure 2This is the second explosion diagram of the embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of an upper cover according to an embodiment of the present invention.

[0021] Figure 4 It is an exploded schematic diagram of the manual mechanism part of an embodiment of the present invention.

[0022] Figure 5 It is a schematic structural diagram of a display screen assembly according to an embodiment of the present invention.

[0023] Figure 6 It is a cross-sectional view of the glass protection cover and the glass when assembled according to the embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the structure of the transmission assembly according to an embodiment of the present invention.

[0025] Figure 8 It is a cross-sectional view of an embodiment of the present invention.

[0026] Fig. 9 It is a partial structural schematic diagram of a gear assembly according to an embodiment of the present invention.

[0027] Fig.10 Schematic diagram of the structure of a gear assembly according to an embodiment of the present invention.

[0028] Fig.11 It is a schematic diagram of the control part of an embodiment of the present invention.

[0029] Fig.12 Schematic diagram of the structure of a proportional gear assembly according to an embodiment of the present invention.

[0030] Reference numerals: 10. Shell; 101. Upper cover; 102. Base; 20. Mounting seat; 30. Manual shaft; 40. Manual gear; 50. Large gear; 60. Operating hole; 70. Positioning block; 80. Groove; 90. Bushing; 100. Plane bearing; 110. Fixed shaft; 120. Lower gear; 130. Upper gear; 140. First sealing ring; 150. Ball bearing; 160. Second sealing ring; 170. Super capacitor; 180. Capacitor plate; 190. Capacitor plate fixing plate; 200. Terminal block; 210. Control board; 220. Drive board assembly; 230. Display screen; 240. Circuit board; 250. First bracket; 260. Second bracket; 270. Third bracket; 280. Bracket fixing plate; 290. Extension cover; 300. Cover; 310. Function button; 320, first notch groove; 330, second notch groove; 340, button lock plate; 350, notch; 360, support block; 370, drive motor; 390, first gear; 400, second gear; 410, rotating shaft; 420, sun gear; 430, planetary gear; 440, worm gear; 450, inner ring gear; 460, output shaft; 470, connecting flange; 480, proportional gear assembly; 4801, outer cover; 4802, proportional large gear; 4803, proportional small gear; 4804, indicating shaft; 4805, induction magnet; 4806, magnetic encoder; 490, indicating mechanism; 500, indicating shaft positioning plate; 510, glass protection cover; 520, explosion-proof glass; 530, control component; 540, driving component; 550, gear assembly; DETAILED DESCRIPTION

[0031] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] Example 1

[0033] like Figure 1-Figure 2 As shown, this embodiment is an electric actuator, including an electric actuator housing 10, a control board 210 with storage and discharge functions, and a driving component 540; a storage and discharge module is arranged on the control board 210. When an external power supply is connected, the actuator uses the power provided by the external power supply, and after being regulated by the control board 210, the driving component 540 is driven to work to drive the valve to open and close, and at the same time, the external power supply is used to charge and store energy to the storage and discharge module on the control board 210; when the external power supply is disconnected, the control board 210 outputs electric energy by itself, drives the motor 370 and the gear transmission component to work and drive the valve to reset to the safe reset position. The storage and discharge module on the control board 210 uses the super capacitor 170 as the main power storage component. When the external power supply fails, the safe reset position can be pre-set according to the actual working condition of each valve.

[0034] Example 2

[0035] like Figure 1-Figure 2 As shown, an electric actuator has a control board 210 in the embodiment, and also includes a driving component 540 and a proportional gear assembly 480. The driving component 540 is used to drive the valve to move, and the proportional gear assembly 480 is used to detect the valve position and feed it back to the control board 210. The control board 210 adjusts the opening and closing angle of the valve by driving the driving component 540.

[0036] The proportional gear assembly 480 is arranged on the driving component 540, and the proportional gear assembly 480 includes an outer cover 4801, a proportional large gear 4802, and a proportional small gear 4803. The proportional large gear 4802 is sleeved with an indication shaft 4804, and the indication shaft 4804 is also linked with the driving component 540. The proportional small gear 4803 is meshed with the proportional large gear 4802. The proportional small gear 4803 is provided with an induction magnet 4805, and a magnetic encoder 4806 is provided above the proportional small gear 4803 for receiving the position of the induction magnet 4805, so as to determine the position of the valve. The control component 530 also includes a timing module, which is used to drive the electric actuator to act at a fixed time and drive the valve to rotate in the expectation of changing the current state of the valve. When the current state of the valve fails to change, the valve is in a fault state.

[0037] refer to Figure 5-Figure 6 The present invention also includes a display screen assembly, which is used to display the working parameters of the valve, and is provided with function buttons, and the working parameters of the valve are adjusted through the function buttons. The display screen assembly includes a display screen 230, an explosion-proof glass 520, and a glass protective cover 510. A filling step is formed on the side of the glass protective cover 510 close to the explosion-proof glass 520. Glue is filled in the filling step to bond the explosion-proof glass 520, wherein the glass protective cover 510 and the explosion-proof glass 520 form a sealing structure, and the sealing method is as follows: fix the glass protective cover 510 and the explosion-proof glass, apply glue in the filling step, wait for the glue to solidify, process the thread of the glass protective cover 510, process the sealing groove on the end face and place a sealing ring in the sealing groove, and clean the glue on the end face of the explosion-proof glass. The function buttons include at least a switch button.

[0038] Now, Example 1 and Example 2 are described in detail as follows: like Figures 1 to 12As shown, the electric actuator housing 10 is composed of an upper cover 101 and a base 102, wherein the space where the upper cover 101 and the base 102 are located is distributed in sequence with the control component 530 and the mechanical components; the control component 530 and the mechanical components are arranged in layers, and the internal structure is reasonably modularized, thereby facilitating assembly, wherein the control component 530 is located inside the upper cover 101, and the mechanical components are located inside the base 102.

[0039] Specifically, the control component 530 is mainly composed of a drive board assembly 220, a control board 210, a display screen assembly, and a storage and discharge module; wherein the control board 210 is electrically connected to the power supply module and the storage and discharge module, and the power supply module serves as the main power supply.

[0040] The mechanical component is mainly the gear assembly 550 and cooperates with the control component 530 to realize the operation of the electric actuator.

[0041] refer to Figure 1-Figure 2 , wherein the storage and discharge module specifically includes a number of supercapacitors 170, capacitor plates 180 and capacitor plate fixing plates 190, wherein the supercapacitors 170 are distributed on the capacitor plates 180 along the height direction of the housing 10, and may be distributed in a single layer or in multiple layers; the capacitor plates 180 are fixedly connected to the capacitor plate fixing plates 190, and the capacitor plates 180 are electrically connected to the control board 210 via the wiring terminals 200, and the wiring terminals 200 are fixed on the corresponding mounting plates, and the mounting plates and the wiring terminals 200 are located on the side close to the control board 210, wherein when the main power supply is in the state, the supercapacitor 170 is in the energy storage state until the energy storage is completed, and when the main power supply is cut off, the control board 210 obtains the electric energy of the supercapacitor 170 for continuous power supply. In the above technical solution, a supercapacitor 170 is arranged inside the electric actuator, so that after the main power supply is disconnected, the backup power supply formed by the supercapacitor 170 can continue to drive the valve to work, thereby avoiding safety hazards, and the supercapacitor 170 is arranged inside, and does not need to provide an external power supply for use; refer to Fig.11 , Fig.11 Schematic diagram of the control part of the present invention, wherein the capacitor plate 180 is provided with a charging control circuit and an automatic power switching circuit, the charging control circuit is used to control the super capacitor 170 to charge and store energy when the main power supply is in operation, and the automatic power switching circuit is used to switch the super capacitor 170 to supply power and achieve reset; In the prior art, there are spring-reset actuators that use springs to force the valve to move in the fully closed direction when the power is off, and the spring reset position has only two positions, namely the starting position and the end position. In addition, in addition to the load torque to drive the valve, the spring-reset actuator also requires torque for winding the spring, so the required torque increases exponentially, resulting in increased power consumption; Therefore, based on the above problems, the present invention adopts a storage and discharge module and arranges it inside the electric actuator to solve the problem that it cannot be reset in time when the power is cut off. At the same time, the present invention adopts a capacitor reset method and abandons the spring reset solution, which can realize the arbitrariness of the reset position, that is, after the reset position is set in advance, when the power is cut off, the storage and discharge module is used to reset, and it can quickly reset to the preset safe reset position; at the same time, since there is no spring reset restriction, the actuator does not need to overcome the torque required for spring reset, ensuring that the output torque of the actuator is consistent with the torque to be opened by the valve, thereby reducing energy consumption, being more energy-saving and environmentally friendly, and greatly improving the service life. Moreover, the capacitor reset method has almost negligible life loss, and compared with the mechanical structure, the service life is also greatly improved.

[0042] In addition, the present invention has a function of fine-tuning the ball when installing the ball. In the prior art, the ball needs to be sealed with a seal to prevent leakage. However, in actual installation, the installation position of the ball cannot guarantee perfect matching with the seal. When there is a deviation in matching, leakage will occur. The prior art uses cams and micro switches, but the adjustment accuracy is large, and sometimes multiple adjustments are required. Even multiple adjustments may fail. Therefore, the present invention uses a magnetic encoder 4806 to detect and fine-tune the valve position: the specific technical solution is as follows: refer to Fig. 9 as well as Fig.10In the present invention, the gear assembly 550 includes a support block 360, a drive motor 370, a large gear 50, a first gear 390 linked to the drive motor 370, and a second gear 400 meshing with the large gear 50. The first gear 390 and the second gear 400 are coaxially arranged, wherein the first gear 390 and the second gear 400 are fixed in a gear frame, the gear frame is fixedly connected to the support block 360, the large gear 50 is eccentrically arranged with the support block 360, the output shaft 460 of the drive motor 370 passes through the support block 360 and a driving gear is arranged at the end, the driving gear is meshed with the first gear 390, when the drive motor 370 is driven, the driving gear on the drive motor 370 drives the first gear 390 to rotate, the first gear 390 drives the shaft where it is located to rotate, and at the same time the second gear 400 rotates The large gear 50 is driven to rotate, wherein a rotating shaft 410 is connected in the large gear 50, and the rotating shaft 410 is connected to a sun gear 420, and planetary gears 430 are distributed around the sun gear 420. A worm gear 440 is arranged outside the planetary gear 430, and the worm gear 440 is sleeved with an inner gear ring 450. The inner gear ring 450 is linked to an output shaft 460, and meshing teeth are formed at the inner end of the output shaft 460 to cooperate with the inner gear ring 450. The worm gear 440 rotates under the action of the gear set composed of the sun gear 420 and the planetary gears 430 and drives the inner gear ring 450 to rotate. During the rotation of the inner gear ring 450, it cooperates with the meshing teeth to drive the output shaft 460 to rotate. In addition, the other end of the output shaft 460 is connected to a connecting flange 470, and the connecting flange 470 is fixed on the base 102 of the housing 10.

[0043] refer to Fig.12 , the support block 360 is provided with a proportional gear assembly 480, an indication shaft positioning plate 500 is provided between the proportional gear assembly 480 and the support block 360, the indication shaft 4804 is positioned by the indication shaft positioning plate 500, and is provided through the indication shaft positioning plate 500, wherein the proportional gear assembly 480 is fixed on the indication shaft positioning plate 500, specifically: The proportional gear assembly 480 includes an outer cover 4801, a proportional large gear 4802, and a proportional small gear 4803. The proportional large gear 4802 is coaxially arranged with the large gear 50. An indication shaft 4804 is sleeved in the proportional large gear 4802. The indication shaft 4804 is arranged through the large gear 50 at the same time. The indication shaft 4804 is connected to an indication mechanism 490. The proportional small gear 4803 is meshed with the proportional large gear 4802. An induction magnet 4805 is arranged in the proportional small gear 4803. A magnetic encoder 4806 is arranged above the proportional small gear 4803 to detect the rotation angle of the indication shaft 4804 and indicate the opening angle of the valve through the indication mechanism 490. The magnetic encoder 4806 is electrically connected to the control board 210, and a magnetic encoder position detection module is arranged on the control board 210. The magnetic encoder 4806 used in the present invention can adopt a magnetic encoder 4806 with a resolution of 4096 or 8192. The present invention combines the magnetic encoder 4806 to adjust the position of the ball, and its adjustment accuracy is small, especially the matching range between the seal and the ball is only about 5°. Therefore, the adjustment of the starting position of the ball is achieved through the magnetic encoder 4806, which can greatly increase the adjustment accuracy and reduce the number of adjustments. The adjustment is more efficient and can ensure the safe operation of the valve.

[0044] Secondly, when the valve is in a working state for a long time, impurities will appear between the seal and the ball, causing the torque of the valve to increase, but the staff cannot detect the increase in torque in time. On the basis of the above technical solution and the above existing problems, the control component 530 in the present invention also includes a timing module, which is used to time the electric actuator to move and drive the valve to rotate in the expectation of changing the current state of the valve. That is, the electric actuator is driven by the control board 210 at regular intervals, and the timing module cooperates with the magnetic encoder 4806 and the control board 210 to realize a small angle rotation of the valve, and a safety diagnosis of the valve is performed. Since the small angle rotation does not greatly affect the working state of the valve, the risk of increased valve torque is reduced. Especially in the event of an emergency, when the valve needs to be operated, if there is an increase in torque, the valve cannot be rotated, which will cause a major accident in serious cases.

[0045] In the present invention, the drive board assembly 220 and the display screen assembly are located between the storage and discharge module and the gear assembly 550. The drive board assembly 220 is used to drive the gear assembly 550 to move, and the display screen assembly is used to display the state parameters of the electric actuator. The display screen assembly includes a display screen 230 and a circuit board 240 arranged in the housing 10, and the display screen 230 is electrically connected to the circuit board 240. The drive board assembly 220 and the control board 210 are respectively mounted on the first bracket 250 and the second bracket 260. The drive board assembly 220 and the control board 210 are both tilted and distributed at a certain angle. An installation space is formed between the drive board assembly 220 and the control board 210 for placing the drive motor 370. One end of the first bracket 250 and the second bracket 260 is arranged on the support block 360, and the other end of the first bracket 250 and the second bracket 260 is provided with a bracket fixing plate 280 connecting the first bracket 250 and the second bracket 260. The display screen assembly is arranged on the third bracket 270 and fixed on the support block 360. The above technical solution can achieve stable fixation of the drive board assembly 220 and the control board 210, and realize modular assembly.

[0046] refer to Figure 1-Figure 3 The housing 10 is provided with an extension cover 290 at a position corresponding to the display screen 230, the extension cover 290 having a display window, a cover 300 being provided inside the extension cover 290, a button hole being provided on the cover 300, a function button 310 being provided in the button hole, the function button 310 being adapted to the function switch on the circuit board 240, the extension cover 290 being further provided with a locking mechanism for locking the function button 310, the locking mechanism comprising notch grooves provided at both ends of the extension cover 290, forming a first notch groove 320 and a second notch groove 330, the locking mechanism also ... The button locking piece 340 is hinged to one of the notches, that is, the button locking piece 340 has a hinged end and a locking end. The hinged end can be hinged to the first notch 320 or the second notch 330, and the corresponding locking end can be located in the first notch 320 or the second notch 330. A notch 350 adapted to the shape of the button is formed on the button locking piece 340. The locking end of the button locking piece 340 is located in the other notch in the locked state and is then locked by a padlock. In this embodiment, the cross-section of the button is a circular structure, and the notch 350 formed on the button locking piece 340 is a semicircular structure.

[0047] The above technical solution sets a locking mechanism for locking the function button 310 on the extension cover 290, including notch grooves set at both ends of the extension cover 290 and a button locking plate 340 hinged to one of the notch grooves, so as to avoid the function button 310 being accidentally triggered due to vibration and prevent the actuator from issuing erroneous instructions due to accidental touch.

[0048] In addition, the existing electric actuators have some problems in transportation and use. First, because the existing manual mechanism is connected with a handwheel or a handle, the overall volume of the electric actuator is large, which occupies a large space and is inconvenient to transport. Secondly, during the actual operation of the existing electric actuator, the presence of the handwheel may cause misoperation. Therefore, the existing electric actuators have certain limitations in transportation and use, and need to be further improved. In addition, the existing electric actuators have some problems in transportation and use. First, because the existing manual mechanism is connected with a handwheel or a handle, the overall volume of the electric actuator is large, which occupies a large space and is inconvenient to transport. Secondly, during the actual operation of the existing electric actuator, the presence of the handwheel may cause misoperation. Therefore, the existing electric actuators have certain limitations in transportation and use, and need to be further improved.

[0049] Based on the above problems, the present invention also provides the following technical solutions: refer to Figure 1 , Figure 4 , Figure 7 as well as Figure 8 A mounting seat 20 is provided on one side of the housing 10, and the mounting seat 20 is fixed to one side of the base 102 by fasteners. A manual mechanism is provided in the mounting seat 20, and the manual mechanism includes a manual shaft 30 and a manual gear 40 provided inside the manual shaft 30, and the manual gear 40 is linked with a large gear 50 inside the housing 10, and the outer end surface of the manual shaft 30 is flush with the outer end surface of the mounting seat 20, and an operating hole 60 connected with an operating member is provided in the manual shaft 30, and the operating hole 60 is recessed inward from the outer end surface of the manual shaft 30. The operating member is a handle, a rocker or an operating rod, which has a connection portion adapted to the operating hole 60. A positioning block 70 is provided in the housing 10, and the positioning block 70 is located on one side of the large gear 50, and the positioning block 70 is formed with a groove 80 toward one end of the manual shaft 30, and one end of the manual shaft 30 is located in the groove 80 and a sleeve 90 is provided on the part in the groove 80.

[0050] The outer end surface of the manual shaft 30 of the present invention is flush with the outer end surface of the mounting base 20, and the operating part is used as an accessory. The operating part is connected to the manual shaft 30 only when manual operation is required. Therefore, it takes up little space, is easy to transport, and saves transportation costs. Compared with the prior art, this design significantly improves the portability and transportation efficiency of the electric actuator. Since the outer end surface of the manual shaft 30 of the present invention is flush with the outer end surface of the mounting base 20, and no handwheel is provided, there is no risk of the operator accidentally touching the manual mechanism when the electric actuator is working, which may cause misoperation. This design greatly improves the safety and reliability of the electric actuator. This design greatly improves the safety and reliability of the electric actuator.

[0051] In the present invention, the manual gear 40 is located at a side close to the shaft sleeve 90 , and a plane bearing 100 is provided between the manual gear 40 and the shaft sleeve 90 .

[0052] A transmission assembly is provided between the manual gear 40 and the large gear 50, and the manual gear 40 is linked with the large gear 50 through the transmission assembly. The transmission assembly includes a fixed shaft 110, a lower gear 120 meshing with the manual gear 40, and an upper gear 130 meshing with the large gear 50. The fixed shaft 110 is arranged in the housing 10, and the lower gear 120 and the upper gear 130 are located at different heights. The manual gear 40 and the lower gear 120 are both helical gears. A transmission assembly is provided between the manual gear 40 of the present invention and the large gear 50 inside the housing 10, and the manual gear 40 is linked with the large gear 50 through the transmission assembly. This design improves the linkage effect between the manual mechanism and the housing 10, making the manual operation smoother. Compared with the prior art, this design improves the control performance of the electric actuator.

[0053] In addition, a first sealing ring 140 is provided between the mounting seat 20 and the housing 10, and a second sealing ring 160 is provided between the mounting seat 20 and the manual shaft 30. A ball bearing 150 is provided between the manual shaft 30 and the mounting seat 20. The ball bearing 150 is a one-way thrust ball bearing 150. The first sealing ring 140 is provided between the mounting seat 20 and the housing 10 of the present invention, and a ball bearing 150 is provided between the manual shaft 30 and the mounting seat 20. This design improves the sealing performance of the electric actuator, prevents the ingress of dust and moisture, and prolongs the service life of the electric actuator. Compared with the prior art, this design improves the durability and maintainability of the electric actuator.

[0054] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0055] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0056] The above description shows and describes several preferred embodiments of the present invention, but as before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept of this article through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. An electric actuator, characterized in that: It includes an electric actuator housing, a control panel with storage and discharge functions, and a driving component; a storage and discharge module is arranged on the control panel. When an external power supply is connected, the actuator uses the power provided by the external power supply, and after being regulated by the control panel, the driving component is driven to drive the valve to open and close. At the same time, the external power supply is used to charge and store energy in the storage and discharge module on the control panel; when the external power supply is disconnected, the control panel outputs electric energy by itself, drives the motor and gear transmission components to work, and drives the valve to reset to a preset safety reset position.

2. An electric actuator according to claim 1, characterized in that: The storage and discharge module on the control board uses super capacitors as main power storage components.

3. An electric actuator according to claim 1, characterized in that: When the external power fails, the safety reset position can be pre-set according to the actual working conditions of each valve.

4. An electric actuator, characterized in that: The control board as claimed in claim 1 also includes a driving component and a proportional gear assembly, wherein the driving component is used to drive the valve to move, and the proportional gear assembly is used to detect the valve position and feed back to the control board, and the control board adjusts the opening and closing angle of the valve by driving the driving component.

5. An electric actuator according to claim 4, characterized in that: The proportional gear assembly is arranged on the driving component, and the proportional gear assembly includes an outer cover, a proportional large gear, and a proportional small gear. The proportional large gear is sleeved with an indication shaft, and the indication shaft is linked with the driving component at the same time. The proportional small gear is meshed with the proportional large gear. An induction magnet is arranged in the proportional small gear, and a magnetic encoder is arranged above the proportional small gear for receiving the position of the induction magnet, so as to determine the position of the valve.

6. An electric actuator according to claim 5, characterized in that: The control panel also includes a timing module, which is used to regularly drive the electric actuator to move and drive the valve to rotate in the expectation of changing the current state of the valve.

7. An electric actuator according to claim 6, characterized in that: When the current state of the valve fails to change, the valve is in a fault state.

8. An electric actuator according to claim 4, characterized in that: It also includes a display screen component, which is used to display the working parameters of the valve. Function buttons are arranged on the display screen component, and the working parameters of the valve are adjusted through the function buttons.

9. The electric actuator according to claim 5, characterized in that: The display screen assembly includes a display screen, explosion-proof glass and a glass protective cover. A filling step is formed on the side of the glass protective cover close to the explosion-proof glass. Glue is filled in the filling step to bond the explosion-proof glass. The glass protective cover and the explosion-proof glass form a sealing structure. The sealing method is as follows: fix the glass protective cover and the explosion-proof glass, apply glue in the filling step, wait for the glue to solidify, process the thread of the glass protective cover, process a sealing groove on the end face and place a sealing ring in the sealing groove, and clean the glue on the end face of the explosion-proof glass.

10. An electric actuator according to claim 8, characterized in that: The function keys at least include a switch key.

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