Anti-interference valve electric actuator

Abstract

The utility model belongs to the field of electric actuators, and provides an anti-interference type valve electric actuator which comprises a machine box, a cover shell is arranged on the side face of the machine box, a sunken groove is formed in the bottom of the end face of the cover shell, two sets of debugging rotary knobs are symmetrically arranged on the bottom face of the sunken groove, a groove is formed in the side wall of the sunken groove, and guide columns are arranged at the four corners in the groove. Two groups of moving plates are slidably arranged among the four guide columns, and the outer sides of the two groups of moving plates are connected with protective shells used for covering the debugging knob; according to the utility model, the debugging knob is covered by the protective shells, the protective shells are slidably arranged on the cover shell through the cooperation of the moving plate, the guide columns and the springs, and under the action of the springs, the two protective shells are closed to cover the debugging knob, so that the debugging knob is prevented from being exposed in a non-debugging stage, the probability of misoperation is reduced, and the debugging efficiency is improved. And meanwhile, the elastic limiting piece is arranged to limit the pulled-open housing, so that the convenience of debugging operation is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of electric actuators, specifically an anti-interference type valve electric actuator. Background Technology

[0002] A valve electric actuator is a machine that uses electricity as its main energy source to drive a valve. It is usually connected to a motor, a transmission mechanism, a position detection and feedback mechanism, and a control system. The electric actuator is connected to the power supply and receives signals from the control system. According to the received signals, the motor starts to rotate and converts the rotational motion into the linear or rotational motion of the valve through the transmission mechanism. By precisely controlling the speed and direction of the motor, the valve can be opened, closed, or adjusted to any intermediate position.

[0003] Existing electric valve actuators are usually equipped with adjustment knobs. During the installation and commissioning of electric valve actuators, the adjustment knobs are rotated to adjust parameters such as the actuator's limit and torque, ensuring that the actuator can accurately control the valve's opening and closing position and flow rate. However, the adjustment knobs are usually exposed, and there is a risk of accidental contact during use, which could lead to misoperation. Such misoperation may cause a series of problems, such as interruption of the process flow, damage to equipment, or even safety accidents.

[0004] To address these issues, those skilled in the art have proposed an anti-interference type electric valve actuator. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an anti-interference type electric valve actuator, which solves the problems in the prior art where the adjustment knob on the electric valve actuator is exposed, making it easy to misoperate and cause safety issues.

[0006] An anti-interference type valve electric actuator includes a chassis, a worm gear assembly, and a cover. A junction box is installed on the top of the chassis, containing a three-phase power supply. An output shaft is vertically rotatable within the chassis via the worm gear assembly. Manual and electric components for driving the worm gear assembly are respectively installed on both sides of the chassis. A cover is installed on the side of the chassis, with a display screen embedded in the top of the cover's end face. A recessed groove is provided at the bottom of the cover's end face, with two sets of adjustment knobs symmetrically arranged on the bottom surface of the recessed groove. A groove is formed on the side wall of the recessed groove, and guide posts are provided at the four corners of the groove. Two sets of movable plates are slidably arranged between the four guide posts. Springs sleeved on the guide posts abut against the opposite sides of the two sets of movable plates. Protective shells for covering the adjustment knobs are connected to the outer sides of the two sets of movable plates. Elastic limiters for limiting the movement of the movable plates are also provided on the cover.

[0007] Preferably, the chassis, junction box, cover, and protective shell are all made of conductive metal materials.

[0008] Preferably, the worm gear assembly includes a worm shaft, a worm sleeve, and a worm wheel. The worm shaft is horizontally rotatable inside the housing and located on one side of the output shaft. The worm sleeve is splined onto the worm shaft, and a worm wheel is meshed on one side of the worm sleeve. The worm wheel is splinedly connected to the output shaft.

[0009] Preferably, the manual component includes a manual shaft and a handwheel. A manual housing is provided on one side of the chassis, and a manual shaft is slidably disposed inside the manual housing. One end of the manual shaft is provided with a drive mechanism for engaging with the worm shaft, and the other end of the manual shaft passes through the manual housing and is connected to a handwheel.

[0010] Preferably, the electric component includes a motor, a gear, and a gear disc. The motor is mounted on the outside of the housing, and its output shaft passes through the housing and is connected to the gear. A gear disc is meshed on one side of the gear, and the gear disc is mounted on the end of the worm shaft away from the manual shaft.

[0011] Preferably, the elastic limiting component includes a stop bar, a connecting plate, a compression spring, and a lifting column. A rectangular groove is formed in the thickness of the top interlayer of the cover. The stop bar slides through the rectangular groove. The bottom end of the stop bar extends to the inside of the groove, and a clearance slope is formed on one side of its bottom end. The top end of the stop bar passes through the cover and is connected to the lifting column. A connecting plate is provided in the middle of the stop bar. The connecting plate is slidably disposed inside the rectangular groove. A compression spring is connected between the top of the connecting plate and the top wall of the rectangular groove.

[0012] Preferably, the protective shell is configured as a fan-shaped structure, and a handle is provided on the outer side of the protective shell.

[0013] Compared with the prior art, this utility model has the following beneficial effects: By providing a protective shell to cover the adjustment knob, the protective shell is slidably set on the cover through the cooperation of a moving plate, guide post and spring. Under the action of the spring, the two protective shells close to cover the adjustment knob, avoiding its exposure during non-adjustment stages and reducing the probability of misoperation. At the same time, an elastic limiting component is provided. When it is necessary to operate the adjustment knob to adjust the actuator, the two protective shells are pulled open by the handle, and the elastic limiting component limits the opened cover to keep it in the open state, ensuring the convenience of adjustment operation. Attached Figure Description

[0014] Figure 1 This is the main view of the present invention.

[0015] Figure 2 This is a partial cross-sectional view of the present invention;

[0016] Figure 3 This is a side view structural diagram of the present invention;

[0017] Figure 4 This is a top cross-sectional view of the casing of this utility model;

[0018] Figure 5 This is a structural diagram of the protective shell of this utility model in the open state;

[0019] Figure 6 This is a partial side sectional view of the casing of this utility model.

[0020] In the picture:

[0021] 1. Chassis; 2. Junction box; 3. Output shaft; 4. Cover; 5. Adjustment knob; 6. Groove; 7. Guide post; 8. Moving plate; 9. Protective shell; 10. Worm shaft; 11. Worm sleeve; 12. Worm wheel; 13. Manual shaft; 14. Manual housing; 15. Motor; 16. Gear; 17. Gear plate; 18. Stop bar; 19. Connecting plate; 20. Compression spring; 21. Lifting column; 22. Rectangular groove; 23. Yielding slope; 24. Handle; 25. Handwheel; 26. Display screen; 27. Spring. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] As attached Figure 1 To be continued Figure 6 As shown:

[0024] This utility model provides an anti-interference type valve electric actuator, including a housing 1, a worm gear assembly, and a cover 4. A junction box 2 is provided on the top of the housing 1, and a three-phase power supply is provided in the junction box 2. An output shaft 3 is vertically rotatable inside the housing 1 via the worm gear assembly. Manual and electric components for driving the worm gear assembly are respectively provided on both sides of the housing 1. A cover 4 is provided on the side of the housing 1. A display screen 26 is embedded in the top of the end face of the cover 4. A recessed groove is provided at the bottom of the end face of the cover 4. Two sets of adjustment knobs 5 are symmetrically arranged on the bottom of the recessed groove. A groove 6 is opened on the side wall of the recessed groove. A guide post 7 is provided at each of the four corners of the groove 6. Two sets of moving plates 8 are slidably arranged between the four guide posts 7. A spring 27 sleeved on the guide post 7 is abutted on the opposite side of the two sets of moving plates 8. A protective shell 9 for covering the adjustment knobs 5 is connected to the outside of the two sets of moving plates 8. An elastic limiting component for limiting the movement of the moving plates 8 is also provided on the cover 4.

[0025] refer to Figure 2 The worm gear assembly includes a worm shaft 10, a worm sleeve 11, and a worm wheel 12. The worm shaft 10 is horizontally rotatably mounted inside the housing 1 on one side of the output shaft 3. The worm sleeve 11 is splined on the worm shaft 10, and the worm wheel 12 is meshed on one side of the worm sleeve 11. The worm wheel 12 is splinedly connected to the output shaft 3.

[0026] refer to Figure 2The manual components include a manual shaft 13 and a handwheel 25. A manual housing 14 is provided on one side of the housing 1. The manual shaft 13 is slidably disposed inside the manual housing 14. One end of the manual shaft 13 is provided with a drive mechanism for docking with the worm shaft 10. The other end of the manual shaft 13 passes through the manual housing 14 and is connected to the handwheel 25.

[0027] refer to Figure 2 The electric components include a motor 15, a gear 16, and a gear disc 17. The motor 15 is mounted on the outside of the housing 1, and its output shaft 3 passes through the housing 1 and is connected to the gear 16. The gear disc 17 is meshed on one side of the gear 16 and is mounted on the end of the worm shaft 10 away from the manual shaft 13.

[0028] The drive mechanism is the one disclosed in the Chinese patent for manual drive mechanism of electric actuator, which is authorized by announcement CN219570271 U.

[0029] In practical use, the electric actuator is powered by a three-phase power supply through the junction box 2 and the control line from the electrical control box. During power supply, the motor 15 drives the gear 16 to rotate. The gear 16 meshes with the gear disc 17. Under the action of meshing force, the worm shaft 10 drives the worm sleeve 11 to rotate. During the rotation of the worm sleeve 11, it meshes with the worm wheel 12 to drive the output shaft 3 to rotate. The output shaft 3 then drives the valve to rotate. Similarly, by pushing the handwheel 25 inward, the handwheel 25 drives the four claws of the manual shaft 13 to enter and lock the worm pin on the worm head. During the pushing process, the ejector pin will also push to push the micro switch to ensure that the actuator is de-energized. Otherwise, if the power is suddenly restored, the motor 15 will rotate and drive the manual shaft 13 and handwheel 25, which could injure people. After ensuring that the actuator is de-energized, it is safe to crank the handwheel 25 to drive the valve to rotate.

[0030] refer to Figure 1 The chassis 1, junction box 2, cover 4 and protective shell 9 are all made of conductive metal materials.

[0031] Among them, the use of conductive metal materials can shield electromagnetic fields, effectively preventing spatial interference from entering the device in the form of electromagnetic wave radiation, thus improving the overall anti-interference capability.

[0032] refer to Figure 5 and Figure 6The elastic limiting component includes a stop bar 18, a connecting plate 19, a compression spring 20, and a lifting column 21. A rectangular groove 22 is provided in the thickness of the top interlayer of the cover 4. The stop bar 18 slides through the rectangular groove 22. The bottom end of the stop bar 18 extends to the inside of the groove 6, and a clearance slope 23 is provided on one side of its bottom end. The top end of the stop bar 18 passes through the cover 4 and is connected to the lifting column 21. A connecting plate 19 is provided in the middle of the stop bar 18. The connecting plate 19 is slidably provided in the inside of the rectangular groove 22. A compression spring 20 is connected between the top of the connecting plate 19 and the top wall of the rectangular groove 22.

[0033] When the movable plate 8 contacts the stop bar 18, it will press the clearance slope 23. The stop bar 18 will move upward after being pushed. When the stop bar 18 moves, it will drive the connecting plate 19 to press the compression spring 20 until the movable plate 8 passes the stop bar 18. At this time, the connecting plate 19 will drive the insertion rod to move downward under the action of the compression spring 20, that is, to limit the movable plate 8 and prevent it from driving the protective shell 9 to move back under the action of the spring 27.

[0034] refer to Figure 4 The protective shell 9 is designed with a fan-shaped structure, and a handle 24 is provided on the outside of the protective shell 9.

[0035] The handle 24 is designed to facilitate pulling outwards.

[0036] Working principle: The two moving plates 8 are in abutting state under the action of spring 27, which in turn drives the two protective shells 9 to be in a closed state, protecting the adjustment knob 5. When it is necessary to adjust the electric actuator, the protective shells 9 are pulled to both sides by the handle 24. The protective shells 9 drive the moving plates 8 to move along the guide post 7. During the movement, the moving plates 8 will compress the spring 27. When the moving plates 8 come into contact with the stop rod 18, they will compress the clearance slope 23. The stop rod 18 will be pushed upward after being pushed. When the stop rod 18 moves, it will drive the connecting plate 19 to compress the compression spring 20 until the movement is complete. When plate 8 passes the stop bar 18, the connecting plate 19 moves downward to reset under the action of the compression spring 20, releasing the force applied to the handle 24. At this time, the moving plate 8 abuts against the stop bar 18 under the action of the spring 27, thus causing the two protective shells 9 to be in the open state. After the debugging is completed, the lifting column 21 is manually raised, which moves the stop bar 18 upward. At this time, the two protective shells 9 can close again to protect the debugging knob 5. This avoids the debugging knob 5 being exposed during non-debugging stages, reducing the probability of misoperation and ensuring the convenience of operation.

[0037] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model, which is defined by the appended claims and their equivalents.

Claims

1. An anti-interference type electric valve actuator, characterized in that, The assembly includes a chassis (1), a worm gear assembly, and a cover (4). A junction box (2) is provided on the top of the chassis (1), and a three-phase power supply is provided inside the junction box (2). An output shaft (3) is provided inside the chassis (1) through the vertical rotation of the worm gear assembly. Manual and electric components for driving the worm gear assembly are provided on both sides of the chassis (1). A cover (4) is provided on the side of the chassis (1). A display screen (26) is embedded in the top of the end face of the cover (4). A recessed groove is provided at the bottom of the end face of the cover (4). The bottom of the recessed groove faces the... It is said to be equipped with two sets of adjustment knobs (5), and the side wall of the recessed groove is provided with a groove (6). The four corners of the groove (6) are provided with guide posts (7). Two sets of moving plates (8) are slidably arranged between the four guide posts (7). The opposite sides of the two sets of moving plates (8) are abutted by springs (27) sleeved on the guide posts (7). The outer sides of the two sets of moving plates (8) are connected to protective shells (9) for covering the adjustment knobs (5). The shells (4) are also provided with elastic limiting members for limiting the movement of the moving plates (8).

2. The anti-interference type electric valve actuator as described in claim 1, characterized in that: The chassis (1), junction box (2), cover (4) and protective shell (9) are all made of conductive metal materials.

3. The anti-interference type electric valve actuator as described in claim 1, characterized in that: The worm gear assembly includes a worm shaft (10), a worm sleeve (11), and a worm wheel (12). The worm shaft (10) is horizontally rotatably mounted inside the housing (1) on one side of the output shaft (3). The worm sleeve (11) is splined on the worm shaft (10). The worm wheel (12) is meshed on one side of the worm sleeve (11) and splined with the output shaft (3).

4. The anti-interference type electric valve actuator as described in claim 3, characterized in that: The manual components include a manual shaft (13) and a handwheel (25). A manual housing (14) is provided on one side of the chassis (1). The manual shaft (13) is slidably disposed inside the manual housing (14). One end of the manual shaft (13) is provided with a drive mechanism for docking with the worm shaft (10). The other end of the manual shaft (13) passes through the manual housing (14) and is connected to the handwheel (25).

5. The anti-interference type electric valve actuator as described in claim 4, characterized in that: The electric components include a motor (15), a gear (16) and a gear disc (17). The motor (15) is mounted on the outside of the housing (1). Its output shaft (3) passes through the housing (1) and is connected to the gear (16). A gear disc (17) is meshed on one side of the gear (16). The gear disc (17) is mounted on the end of the worm shaft (10) away from the manual shaft (13).

6. The anti-interference type electric valve actuator as described in claim 1, characterized in that: The elastic limiting component includes a stop bar (18), a connecting plate (19), a compression spring (20), and a lifting column (21). A rectangular groove (22) is provided in the thickness of the top interlayer of the cover (4). The stop bar (18) slides through the rectangular groove (22). The bottom end of the stop bar (18) extends to the inside of the groove (6), and a clearance slope (23) is provided on one side of its bottom end. The top end of the stop bar (18) passes through the cover (4) and is connected to the lifting column (21). A connecting plate (19) is provided in the middle of the stop bar (18). The connecting plate (19) is slidably provided in the inside of the rectangular groove (22). A compression spring (20) is connected between the top of the connecting plate (19) and the top wall of the rectangular groove (22).

7. The anti-interference type electric valve actuator as described in claim 1, characterized in that: The protective shell (9) is configured as a fan-shaped structure, and a handle (24) is provided on the outside of the protective shell (9).

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