An electric actuator based on precise control technology

Abstract

The application discloses an electric actuator based on precision control technology in the technical field of electric actuators, which comprises a shell, connecting pipes arranged on both sides of the shell, a supporting cover arranged on the top of the shell, a valve shaft rotatably connected to the top of the supporting cover through a bearing, a valve core movably connected in the shell and connected to the bottom end of the valve shaft, and a laser range finder corresponding to the required opening degree of the valve core, wherein when the opening degree of the valve core is changed, the laser range finder corresponding to the required opening degree of the valve core is enabled to work; when the valve shaft rotates, the sharp cone rotates along with the valve shaft; the distance between the working laser range finder and the sharp cone tip part is identified by the working laser range finder and is transmitted to a controller in real time; when the sharp cone rotates to the position of the laser range finder corresponding to the required opening degree, that is, when the distance between the sharp cone tip part and the working laser range finder meets the set value, the controller controls the motor to stop working, so that the precision control of the opening degree of the valve core is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of electric actuators, and in particular to an electric actuator based on precise control technology. Background Art

[0002] An electric actuator is a control system that controls the opening or closing of a valve. The scope of use of an electric actuator is relatively wide. It can control the use of a variety of valves. When the valve is closed, the fluid in the valve and pipeline does not flow. An electric actuator is a field instrument that uses a motor to drag the valve to control the flow of the medium. Compared with pneumatic actuators, it has the advantages of convenient energy supply, simple structure, high precision, and frequent operation. Therefore, it has been widely used in the power, chemical and metallurgical industries.

[0003] When an electric actuator controls the valve opening, the current motor-controlled valve opening accuracy is poor and precise control cannot be achieved. To this end, we propose an electric actuator based on precise control technology. Summary of the Invention

[0004] The object of the present invention is to provide an electric actuator based on precise control technology to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an electric actuator based on precise control technology, comprising: a housing;

[0006] Connecting pipes are provided on both sides of the shell;

[0007] A support cover is provided on the top of the housing, and the top of the support cover is rotatably connected to the valve shaft through a bearing;

[0008] The bottom end of the valve shaft passes through the housing and is connected to a valve core movably connected in the housing. The valve shaft is rotatably connected to the housing via a bearing.

[0009] A fixed cover is provided on the top of the support cover, and the top end of the valve shaft is located in the fixed cover;

[0010] A motor is provided in the fixed cover, and a transmission assembly connected to the output end of the motor is provided at the top end of the valve shaft;

[0011] An indicator assembly is provided on the top of the valve shaft;

[0012] The top of the fixed cover is provided with a mounting assembly, and the mounting assembly is provided with an identification assembly that matches the indicating assembly;

[0013] A controller is provided on the top of the fixed cover, and the controller is electrically connected to the motor.

[0014] As a preferred solution of the electric actuator based on precise control technology described in the present invention, the transmission assembly includes an output shaft connected to the output end of the motor, an output pulley is sleeved on the output shaft, a transmission pulley is sleeved on the valve shaft, and the transmission pulley is located in a fixed cover, and a transmission belt connected to the output pulley is provided on the transmission pulley.

[0015] As a preferred solution of the electric actuator based on the precise control technology described in the present invention, the bottom end of the output shaft is rotatably connected to the fixed cover through a bearing.

[0016] As a preferred solution of the electric actuator based on precise control technology described in the present invention, wherein: a support rail is provided on the fixed cover, a spring is provided on the support rail, and a support bearing seat slidably connected to the support rail is provided on the front side of the spring, an extrusion wheel is rotatably connected to the support bearing seat, and the front side of the extrusion wheel is in contact with the transmission belt.

[0017] As a preferred solution of the electric actuator based on precise control technology described in the present invention, the indicating assembly includes a rotating shaft arranged at the top end of the valve shaft, and a pointed cone is sleeved on the rotating shaft.

[0018] As a preferred solution of the electric actuator based on precise control technology described in the present invention, the identification component includes two groups of mounting rods with identical structures, the bottom ends of the two groups of mounting rods are connected to the mounting ring, and the inner wall of the mounting ring is evenly provided with laser rangefinders electrically connected to the controller, and the laser rangefinder is at the same height as the pointed cone.

[0019] As a preferred solution of the electric actuator based on precise control technology described in the present invention, the mounting assembly includes a top plate that is fittedly connected to the top of the fixed cover, a connecting block that passes through the fixed cover is provided at the bottom of the top plate, and the bottom two sides of the connecting block are respectively connected to the two groups of mounting rods, and the bottom of the top plate is evenly circumferentially provided with magnetic seats, and the magnetic seats are adsorbed and connected to the top of the fixed cover.

[0020] As a preferred solution of the electric actuator based on precise control technology described in the present invention, the transmission belt is a round rubber belt, and the inner cross-sectional width of the belt is smaller than the outer cross-sectional width, and the output pulley and the transmission pulley are provided with connecting grooves that match the transmission belt.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: when the valve core opening is changed, the laser rangefinder corresponding to the required valve core opening is activated, the valve shaft rotates, and the rotating shaft is driven accordingly, so that the pointed cone can rotate. The distance to the tip of the pointed cone is identified by the working laser rangefinder, and the distance is transmitted to the controller in real time for processing. When the pointed cone rotates to the laser rangefinder position corresponding to the required opening, that is, when the working laser rangefinder identifies that the distance between the pointed cone and the tip meets the set value, the controller controls the motor to stop working, thereby achieving precise control of the valve core opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of an electric actuator based on precise control technology of the present invention;

[0023] Figure 2 This is a schematic top view of the laser rangefinder and the pointed cone structure of the electric actuator based on the precision control technology of the present invention;

[0024] Figure 3 This is a schematic diagram of the installation assembly structure of an electric actuator based on precise control technology of the present invention;

[0025] Figure 4 This is a schematic top view of the transmission assembly structure of an electric actuator based on precise control technology of the present invention.

[0026] In the figure: 1. Housing; 2. Connecting pipe; 3. Support cover; 4. Valve shaft; 5. Valve core; 6. Fixed cover; 7. Motor; 8. Output shaft; 9. Output pulley; 10. Drive pulley; 11. Drive belt; 12. Extrusion wheel; 13. Support bearing seat; 14. Support rail; 15. Spring; 16. Rotating shaft; 17. Cone; 18. Mounting ring; 19. Laser rangefinder; 20. Mounting rod; 21. Controller; 22. Top plate; 23. Connecting block; 24. Magnetic seat. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1

[0029] Reference Figures 1 to 4 ,An electric actuator based on precise control technology, comprising, a housing 1;

[0030] Connecting pipes 2 are provided on both sides of the housing 1, and the connecting pipes 2 are connected to external pipelines;

[0031] A support cover 3 is provided on the top of the housing 1, and a valve shaft 4 is rotatably connected to the top of the support cover 3 through a bearing;

[0032] The bottom end of the valve shaft 4 passes through the housing 1 and is connected to a valve core 5 movably connected to the housing 1. By rotating the valve shaft 4, the valve core 5 can rotate in the housing 1, changing the opening of the valve core 5, and thus adjusting the speed of the fluid passing through. The valve shaft 4 is rotatably connected to the housing 1 through a bearing, which can improve the stability of the valve shaft 4 during rotation. By rotating the valve shaft 4, the valve core 5 can be driven to rotate, thereby changing the opening of the valve core 5.

[0033] A fixed cover 6 is provided on the top of the support cover 3, and the top end of the valve shaft 4 is located in the fixed cover 6;

[0034] A motor 7 is provided in the fixed cover 6, and a transmission assembly connected to the output end of the motor 7 is provided at the top of the valve shaft 4. The transmission assembly is driven by the motor 7 to rotate the valve shaft 4.

[0035] An indicator assembly is provided on the top of the valve shaft 4;

[0036] A mounting assembly is provided on the top of the fixed cover 6, and an identification assembly that cooperates with the indication assembly is provided on the mounting assembly;

[0037] A controller 21 is provided on the top of the fixed cover 6 , and the controller 21 is electrically connected to the motor 7 , and the motor 7 is controlled by the controller 21 .

[0038] The transmission assembly includes an output shaft 8 connected to the output end of the motor 7, an output pulley 9 is sleeved on the output shaft 8, a transmission pulley 10 is sleeved on the valve shaft 4, and the transmission pulley 10 is located in the fixed cover 6, and a transmission belt 11 connected to the output pulley 9 is provided on the transmission pulley 10. The output shaft 8 is controlled to rotate by the motor 7, so that the output pulley 9 rotates, and then the transmission pulley 10 is driven to rotate by the transmission belt 11, which can drive the valve shaft 4 to rotate. The transmission belt 11 is a circular rubber belt, and the inner cross-sectional width of the belt is smaller than the outer cross-sectional width, and the output pulley 9 and the transmission pulley 10 are provided with a connecting groove that matches the transmission belt 11.

[0039] The bottom end of the output shaft 8 is rotatably connected to the fixed cover 6 via a bearing, so that the stability of the output shaft 8 during rotation can be improved.

[0040] The support rail 14 is arranged on the fixed cover 6, the spring 15 is arranged on the support rail 14, and the front side of the spring 15 is provided with a support bearing seat 13 which is in sliding connection with the support rail 14, the extrusion wheel 12 is rotatably connected to the support bearing seat 13, and the front side of the extrusion wheel 12 is in contact with the transmission belt 11. The spring 15 applies a forward force to the support bearing seat 13, so that the extrusion wheel 12 moves forward, drives the transmission belt 11 to be tensioned, and the loosening of the transmission belt 11 can be avoided to affect the rotation of the valve shaft 4.

[0041] The indicating assembly comprises a rotating shaft 16 arranged at the top end of the valve shaft 4, and a sharp cone 17 sleeved on the rotating shaft 16. When the valve shaft 4 rotates, the rotating shaft 16 can drive the sharp cone 17 to rotate.

[0042] The identifying assembly comprises two groups of installation rods 20 which are identical in structure, the bottom ends of the two groups of installation rods 20 are connected with the mounting ring 18, the inner wall of the mounting ring 18 is uniformly provided with laser range finders 19 which are electrically connected with the controller 21, and the laser range finders 19 are at the same height as the sharp cone 17. The positions of the laser range finders 19 correspond to the multiple opening degrees of the valve core 5 in turn. When the valve core 5 rotates to the required opening degree, the distance between the sharp cone 17 and the laser range finder 19 is the shortest, which is the set value recognized by the controller 21. When the opening degree of the valve core 5 is changed, the laser range finder 19 corresponding to the required opening degree of the valve core 5 is enabled to work. When the valve shaft 4 rotates, the rotating shaft 16 is driven to rotate, so that the sharp cone 17 rotates. The distance between the sharp cone 17 and the working laser range finder 19 is recognized, and the distance is transmitted to the controller 21 in real time. When the sharp cone 17 rotates to the position of the laser range finder 19 corresponding to the required opening degree, that is, when the distance between the sharp cone 17 and the working laser range finder 19 meets the set value, the motor 7 is stopped by the controller 21. At this time, the opening degree of the valve core 5 is the required opening degree, so that the accurate control of the opening degree of the valve core 5 can be realized.

[0043] Example 2

[0044] Reference Figure 1 and Figure 3The mounting assembly includes a top plate 22 that is fitted and connected to the top of the fixed cover 6. The fixed cover 6 can support the top plate 22. A connecting block 23 that passes through the fixed cover 6 is provided at the bottom of the top plate 22. The bottom sides of the connecting block 23 are respectively connected to two sets of mounting rods 20, so that the mounting ring 18 can be assembled together. In order to fix the top plate 22, a magnetic seat 24 is evenly arranged in an annular direction at the bottom of the top plate 22, and the magnetic seat 24 is adsorbed and connected to the top of the fixed cover 6. By being adsorbed and connected to the fixed cover 6 through the magnetic seat 24, the top plate 22 can be fixed to the fixed cover 6. The connecting block 23 passes through the fixed cover 6, so that a through hole needs to be opened on the top of the fixed cover 6. This through hole can be used to remove the identification component, so as to facilitate the inspection and maintenance of each laser rangefinder 19.

[0045] The rest of the structure is the same as that of Example 1.

[0046] Usage process: The output shaft 8 is controlled by the motor 7 to rotate, so that the output pulley 9 rotates, and then the transmission pulley 10 is driven to rotate through the transmission belt 11, which can drive the valve shaft 4 to rotate, and then drive the valve core 5 to rotate. The opening of the valve core 5 is changed by the rotation of the valve core 5. When the opening of the valve core 5 is changed, the laser rangefinder 19 corresponding to the required opening of the valve core 5 is activated. The valve shaft 4 rotates, so that the rotating shaft 16 is driven to follow, so that the pointed cone 17 can be rotated. The working laser rangefinder 19 identifies the distance to the tip of the pointed cone 17 and transmits the distance to the controller 21 in real time for processing. When the pointed cone 17 rotates to the position of the laser rangefinder 19 corresponding to the required opening, that is, when the working laser rangefinder 19 identifies that the distance between the laser rangefinder 19 and the tip of the pointed cone 17 meets the set value, the controller 21 controls the motor 7 to stop working, thereby achieving precise control of the opening of the valve core 5.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electric actuator based on precise control technology, characterized by: include, housing (1); Connecting pipes (2) are provided on both sides of the housing (1); A support cover (3) is provided on the top of the housing (1), and the top of the support cover (3) is rotatably connected to a valve shaft (4) via a bearing; The bottom end of the valve shaft (4) passes through the housing (1) and is connected to a valve core (5) movably connected to the housing (1), and the valve shaft (4) is rotatably connected to the housing (1) via a bearing; A fixed cover (6) is provided on the top of the support cover (3), and the top end of the valve shaft (4) is located inside the fixed cover (6); A motor (7) is provided in the fixed cover (6), and a transmission assembly connected to the output end of the motor (7) is provided at the top end of the valve shaft (4); An indicator assembly is provided on the top of the valve shaft (4); A mounting assembly is provided on the top of the fixed cover (6), and an identification assembly that cooperates with the indication assembly is provided on the mounting assembly; A controller (21) is provided on the top of the fixed cover (6), and the controller (21) is electrically connected to the motor (7); The indicating assembly comprises a rotating shaft (16) arranged at the top end of the valve shaft (4), and a pointed cone (17) is sleeved on the rotating shaft (16); The identification assembly comprises two groups of mounting rods (20) of identical structure, the bottom ends of the two groups of mounting rods (20) are connected to the mounting ring (18), the inner wall of the mounting ring (18) is evenly provided with laser rangefinders (19) electrically connected to the controller (21), and the laser rangefinders (19) and the pointed cone (17) are at the same height; The position of the laser rangefinder corresponds to the multiple openings required by the valve core at normal times. By rotating the valve shaft, the rotating shaft is driven to rotate, and the cone can be rotated. The working laser rangefinder identifies the distance to the tip of the cone and transmits the distance to the controller in real time for processing. When the laser rangefinder identifies that the distance to the tip of the cone meets the set value, the controller controls the motor to stop working.

2. The electric actuator based on precise control technology according to claim 1, characterized in that: The transmission assembly includes an output shaft (8) connected to the output end of the motor (7), an output pulley (9) is sleeved on the output shaft (8), a transmission pulley (10) is sleeved on the valve shaft (4), and the transmission pulley (10) is located in the fixed cover (6), and a transmission belt (11) connected to the output pulley (9) is provided on the transmission pulley (10).

3. The electric actuator based on precise control technology according to claim 2, characterized in that: The bottom end of the output shaft (8) is rotatably connected to the fixed cover (6) via a bearing.

4. The electric actuator based on precise control technology according to claim 2, characterized in that: The fixed cover (6) is provided with a support rail (14), the support rail (14) is provided with a spring (15), and the front side of the spring (15) is provided with a support bearing seat (13) slidably connected to the support rail (14), the support bearing seat (13) is rotatably connected to the extrusion wheel (12), and the front side of the extrusion wheel (12) is in contact with the transmission belt (11).

5. The electric actuator based on precise control technology according to claim 1, characterized in that: The mounting assembly includes a top plate (22) that is fitted and connected to the top of the fixed cover (6); a connecting block (23) that passes through the fixed cover (6) is provided at the bottom of the top plate (22); both sides of the bottom of the connecting block (23) are respectively connected to two groups of the mounting rods (20); a magnetic seat (24) is uniformly provided in an annular direction at the bottom of the top plate (22), and the magnetic seat (24) is adsorbed and connected to the top of the fixed cover (6).

6. The electric actuator based on precise control technology according to claim 2, characterized in that: The transmission belt (11) is a circular rubber belt, and the inner cross-sectional width of the belt is smaller than the outer cross-sectional width, and the output pulley (9) and the transmission pulley (10) are provided with connection grooves matching the transmission belt (11).

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