Actuator

Abstract

According to the technical scheme, the actuator is characterized by comprising a shell, the shell is fixedly connected with a protection shaft sleeve and an electric control air cylinder, the protection shaft sleeve is connected with a first connecting shaft, the first connecting shaft is connected with a first rotating connecting piece, and the first rotating connecting piece is connected with a second rotating connecting piece; the second rotating connecting piece is connected with a second connecting shaft, the second connecting shaft is connected with a first rotating piece, the shell is connected with a first transmission shaft, the first transmission shaft is connected with a first connecting block, the first connecting block is connected with a second transmission shaft connected with the first rotating piece, and the second transmission shaft is connected with a second connecting block; a common motor is replaced by the air cylinder, a set of transmission system suitable for the air cylinder is designed, and the actuator forms a structure similar to a piston engine, so that the actual output torque of the actuator is large, and starting is fast; the valve is suitable for large valves or heavy valves in various large pipeline systems.

Description

Technical Field

[0001] The present invention relates to an actuator. Background Art

[0002] Actuators convert electrical or electronic signals into mechanical motion and are often used in the automatic opening and closing of valves. However, the design method of simply integrating the functions of multiple modules into the actuator has a significant disadvantage, namely, it affects the structural size of the actuator, and the increase in structural size is often unfavorable. The market usually adopts the method of directly driving the drive shaft to rotate by an electric motor to provide power. The large-sized actuators used in large pipeline valve structures drive the rotation of large valves. As the overall volume of the actuator increases, the friction between the various components in the actuator will also increase, resulting in the motor as the power source must be larger and require more current when operating. This results in high consumption and low efficiency, large space occupation and low safety. In essence, the motor has a small output torque and slow startup. Therefore, an actuator is needed that uses a power source with a large output torque and fast startup to drive the rotation of large valves.

[0003] In view of the above reasons, how to use a power source with large output torque and fast startup and capable of driving the rotation of a large valve is exactly the problem considered in this application. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, an actuator is provided. The actuator adopts a power source with large output torque and fast starting, and can drive large valves to rotate.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: an actuator includes a shell, the shell is fixedly connected to a protective sleeve and an electric control cylinder, the protective sleeve is slidably connected to a first connecting shaft connected to the electric control cylinder, the first connecting shaft is connected to a first rotating connecting member, the protective sleeve is also fixedly connected to a first track for controlling the first rotating connecting member to move only in a horizontal direction, the first rotating connecting member is connected to a second rotating connecting member, the second rotating connecting member is connected to the second connecting shaft, the second connecting shaft is connected to the first rotating member, the shell is also rotatably connected to a first transmission shaft, the first transmission shaft is fixedly connected to a first connecting block in the form of a rectangular parallelepiped, the first connecting block is fixedly connected to a second transmission shaft rotatably connected to the first rotating member, the second transmission shaft is fixedly connected to a second connecting block in the form of a rectangular parallelepiped, the first connecting block and the second connecting block are symmetrically arranged, the second connecting block is fixedly connected to a third transmission shaft connected to the valve, and the first transmission shaft and the third transmission shaft are arranged on the same axis.

[0006] In summary, the above technical solution has the following beneficial effects: Common actuators on the market usually use engines as power sources, but when the actuator is used in long-line pipeline systems, such as oil transmission or natural gas transmission, it is often necessary to drive a larger valve to rotate. The valve itself will generate great friction due to the increase in volume. In addition, the actuator also needs to increase in volume to increase the strength of the device, and the friction between the various components in the actuator will also increase. If the electric motor is still used as the power source, a larger model of the electric motor must be used. However, the large electric motors currently on the market cannot fully match large valves, and when outputting the same torque, the electric motor has high consumption, low efficiency, and occupies a large space, so the cost performance is low. In comparison, the cylinder has a large output torque and fast startup, and its structure is simple and small in size, making it more suitable as a power source. The electric motor can directly output rotation, thereby driving the transmission shaft connected to the valve to rotate and control the valve, but the cylinder directly outputs extension and retraction, so a transmission system different from the electric motor transmission system is required. In the present invention, the electric cylinder is controlled by an electric signal. After startup, the first connecting shaft performs extension and retraction movement, and the first connecting shaft drives the first rotating connecting member to move. In order to prevent the first rotating connecting member from being misaligned, a first track is set to limit the movement of the first rotating connecting member, and then the second transmission shaft is driven to move through the second rotating connecting member, the second connecting shaft and the first rotating member at one time. The second transmission shaft will rotate with the axis of the first transmission shaft and the third transmission shaft as the center, thereby driving the first transmission shaft and the third transmission shaft to rotate simultaneously through the first connecting block and the second connecting block, and finally playing the role of controlling the rotation of the valve. Since the horizontal distances from the electric cylinder to the first and third transmission shafts are fixed, the second transmission shaft will be driven to rotate, and the horizontal distance from the electric cylinder to the second transmission shaft will change regularly within a range. Therefore, a second rotating connection is provided to be rotationally connected to the first rotating connection, and the first rotating connection is rotationally connected to the second transmission shaft. Thus, the angles generated by the rotations of the first connecting shaft and the second connecting shaft and the angles generated by the rotations of the first rotating connection and the second transmission shaft compensate for the distance difference, thereby ensuring the normal operation of the entire transmission system. The present invention replaces a common electric motor with a cylinder and designs a transmission system suitable for the cylinder. The actuator forms a structure similar to a piston engine, so that the actual output torque of the actuator is large and the start-up is fast. It is suitable for large valves or heavy valves in various large pipeline systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of the three-dimensional structure of an actuator; FIG2 is a cross-sectional view of the present invention; Figure 3 shows Figure 2 A partial enlarged view of point A in the middle; Figure 4 shows Figure 2 A partial enlarged view of point B in the middle; FIG5 is a schematic diagram of the three-dimensional structure of the protective sleeve and the second rail.

[0008] Reference numerals: 1, housing; 2, protective sleeve; 3, electronically controlled cylinder; 4, first transmission shaft; 5, second rail; 6, second jack; 21. First connecting shaft; 22. First rotating connecting member; 23. First track; 24. Second rotating connecting member; 25. Second connecting shaft; 26. First rotating member; 211, first rod; 212, second rod; 213, first threaded rod; 214, first threaded tube; 215, second threaded rod; 216, second threaded tube; 221, first accommodating chamber; 241, first rotating shaft; 261, third threaded rod; 262, third threaded tube; 41, first connecting block; 42, second transmission shaft; 43, second connecting block; 44, third transmission shaft; 441, first bevel gear; 442, second bevel gear; 443, third rotating shaft; 444, handwheel; 445, third bevel gear; 446, fourth rotating shaft; 447, wheel; 44 8. First jack; 51. Third connecting shaft; 52. Third rotating connecting member; 53. Fourth rotating connecting member; 54. Fourth connecting shaft; 55. Second rotating member; 56. Disc; 511. Moving member; 512. Detector; 513. Fourth threaded rod; 521. Fourth threaded tube; 522. Second accommodating chamber; 531. Fifth threaded tube; 532. Second rotating shaft; 541. Fifth threaded rod; 542. Sixth threaded rod; 551. Sixth threaded tube. DETAILED DESCRIPTION

[0009] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0010] Reference Figure 1-5As shown, an actuator includes a housing 1, the housing 1 is fixedly connected to a protective sleeve 2 and an electric control cylinder 3, the protective sleeve 2 is slidably connected to a first connecting shaft 21 connected to the electric control cylinder 3, the first connecting shaft 21 is connected to a first rotating connecting member 22, the protective sleeve 2 is also fixedly connected to a first track 23 for controlling the first rotating connecting member 22 to move only in the horizontal direction, the first rotating connecting member 22 is connected to a second rotating connecting member 24, the second rotating connecting member 24 is connected to a second connecting shaft 25, the second connecting shaft 25 is connected to the first rotating member 26, the housing 1 is also rotatably connected to a first transmission shaft 4, the first transmission shaft 4 is fixedly connected to a first connecting block 41 in the form of a rectangular parallelepiped, the first connecting block 41 is fixedly connected to a second transmission shaft 42 rotatably connected to the first rotating member 26, the second transmission shaft 42 is fixedly connected to a second connecting block 43 in the form of a rectangular parallelepiped, the first connecting block 41 and the second connecting block 43 are symmetrically arranged, the second connecting block 43 is fixedly connected to a third transmission shaft 44 connected to the valve, and the first transmission shaft 4 and the third transmission shaft 44 are arranged on the same axis; Common actuators on the market usually use engines as their power source. However, when actuators are used in long-line pipeline systems, such as oil or natural gas transmission, they often need to drive larger valves to rotate. The valve itself will generate great friction due to its increased size. In addition, the actuator also needs to increase its size to increase the strength of the device, and the friction between the various components in the actuator will also increase. If electric motors are still used as power sources, larger motors must be used. However, large electric motors currently on the market cannot fully match large valves, and when outputting the same torque, electric motors have high consumption, low efficiency, and occupy a large space, so the cost-effectiveness is low. In contrast, cylinders have high output torque and fast startup, and they have a simple structure and a small size. More suitable as a power source; The electric motor can directly output rotation, thereby driving the transmission shaft connected to the valve to rotate to control the valve, but the cylinder directly outputs extension and retraction, so a transmission system different from the electric motor transmission system is required. In the present invention, the electric control cylinder 3 is controlled by an electric signal. After startup, the first connecting shaft 21 performs extension and retraction movement, and the first connecting shaft 21 drives the first rotating connection member 22 to move. In order to prevent the first rotating connection member 22 from being misplaced, a first track 23 is set to limit the movement of the first rotating connection member 22, and then the second transmission shaft 42 is driven to move through the second rotating connection member 24, the second connecting shaft 25 and the first rotating member 26 at one time. The second transmission shaft 42 will rotate with the axis of the first transmission shaft 4 and the third transmission shaft 44 as the center, thereby driving the first transmission shaft 4 and the third transmission shaft 44 to rotate simultaneously through the first connecting block 41 and the second connecting block 43, and finally playing the role of controlling the rotation of the valve. Since the horizontal distances between the electric cylinder 3 and the first transmission shaft 4 and the third transmission shaft 44 are fixed, the second transmission shaft 42 will be driven to rotate, and the horizontal distance between the electric cylinder 3 and the second transmission shaft 42 will change regularly within a range. Therefore, the second rotating connection member 24 is rotatably connected to the first rotating connection member 22, and the first rotating member 26 is rotatably connected to the second transmission shaft 42. The angle generated by the rotation of the first connecting shaft 21 and the second connecting shaft 25 and the angle generated by the rotation of the first rotating member 26 and the second transmission shaft 42 compensate for the distance difference, thereby ensuring the normal operation of the entire transmission system. The present invention replaces a common electric motor with a cylinder and designs a transmission system suitable for the cylinder. The actuator forms a structure similar to a piston engine, so that the actual output torque of the actuator is large and the start-up is fast. It is suitable for large valves or heavy valves in various large pipeline systems.

[0011] Furthermore, the first connecting shaft 21 includes a first rod body 211 and a second rod body 212. The first rod body 211 is fixedly connected to a first threaded rod 213 on the side facing the second rod body 212. The second rod body 212 is fixedly connected to a first threaded tube 214 for engaging with the first threaded rod 213 on the side facing the first rod body 211. The second rod body 212 is fixedly connected to a second threaded rod 215 on the side facing the first rotating connector 22. The first rotating connector 22 is fixedly connected to a second threaded tube 216 for engaging with the second threaded rod 215 on the side facing the second rod body 212. The connection between the first rod body 211 and the second rod body 212 is provided in the protective sleeve 2. Since the first connecting shaft 21 in a large-scale pipeline system is relatively long, an integrated shaft body is prone to breakage. Therefore, the first rod body 211 and the second rod body 212 connected by threads are used as the first connecting shaft 21, and a third rod body can be added on this basis. The threaded connection can make the direction in which the first rod body 211 and the second rod body 212 may produce relative movement perpendicular to the movement direction of the first rod body 211 and the second rod body 212 when the actuator is operating. This can effectively reduce the possibility of the first rod body 211 and the second rod body 212 being separated, and the connection between the first rod body 211 and the second rod body 212 is set in the protective shaft sleeve 2, which can further reduce the possibility of the first rod body 211 and the second rod body 212 being separated.

[0012] Furthermore, the second rotating connector 24 is U-shaped and fixedly connected to the second connecting shaft 25 at its bottom. The first rotating connector 24 is fixedly connected to the first rotating shaft 241 at one end away from the second connecting shaft 25. The first rotating connector 22 is provided with a first accommodating cavity 221 for accommodating the first rotating shaft 241. The second U-shaped rotating connector 24 has a stronger load-bearing capacity and can effectively balance the asymmetric pressure at both ends. Due to the limitation of the first track 23, the first rotating connector 22 will not rotate, and the second rotating connector 24 will rotate around the axis of the first rotating shaft 241.

[0013] Furthermore, the first rotating member 26 is fixedly connected to a third threaded rod 261 on the side facing the second connecting shaft 25, and the second connecting shaft 25 is fixedly connected to a third threaded rod 261 on the side facing the first rotating member 26. Threaded pipe 262; The threaded connection can ensure that the direction of relative movement between the first rotating member 26 and the second connecting shaft 25 is perpendicular to the movement direction of the first rotating member 26 and the second connecting shaft 25 when the actuator is operating, which can effectively reduce the possibility of the first rotating member 26 and the second connecting shaft 25 being separated.

[0014] Furthermore, the housing 1 is also fixedly connected to a second track 5 fixedly connected to the protective sleeve 2, the second track 5 is slidably connected to a third connecting shaft 51, the third connecting shaft 51 is connected to a third rotating connecting member 52, the third rotating connecting member 52 is connected to a fourth rotating connecting member 53, the fourth rotating connecting member 53 is connected to a fourth connecting shaft 54, the fourth connecting shaft 54 ​​is connected to a second rotating member 55, and the second rotating member 55 is rotatably connected to a disk 56 fixedly connected to the first transmission shaft 4, and the center line of the disk 56 is staggered with the axis of the first transmission shaft 4; The third connecting shaft 51 is further threadedly connected to a moving member 511 that is slidably connected to the second rail 5 and extends out of the housing 1. The moving member 511 is connected to a detector 512 disposed outside the housing 1. The third connecting shaft 51 is fixedly connected to a fourth threaded rod 513 on the side facing the third rotating connecting member 52, and the third rotating connecting member 52 is fixedly connected to a fourth threaded rod 513 on the side facing the third connecting shaft 51. The corrugated tube 521, the fourth connecting shaft 54 ​​is fixedly connected to a fifth threaded rod 541 on the side facing the fourth rotating connecting member 53, the fourth rotating connecting member 53 is fixedly connected to a fifth threaded tube 531 on the side facing the fourth connecting shaft 54 ​​for engaging with the fifth threaded rod 541, the fourth connecting shaft 54 ​​is fixedly connected to a sixth threaded rod 542 on the side facing the second rotating member 55, and the second rotating member 55 is fixedly connected to a sixth threaded tube 551 on the side facing the fourth connecting shaft 54 ​​for engaging with the sixth threaded rod 542; The fourth rotating connecting member 53 is fixedly connected to the second rotating shaft 532 at one end away from the fourth connecting shaft 54 ​​. The third rotating connecting member 52 is provided with a second accommodating cavity 522 for accommodating the second rotating shaft 532 . The series of transmission structures connected to the electronically controlled cylinder 3 is used as the main transmission system. On this basis, a sub-transmission system is set, that is, a series of transmission structures from the second track 5 to the second rotating member 55. The working principle of the sub-transmission system is similar to that of the main transmission system. The difference is that under normal circumstances, the sub-transmission system is driven by the first transmission shaft 4, and the first transmission shaft 4 drives the disc 56 to rotate. Since the center line of the disc 56 is staggered with the axis of the first transmission shaft 4, the disc 56 will be forced to drive the second rotating member 55 to move when it rotates, but will not drive the second rotating member 55 to move. The component 55 rotates, thereby enabling the fourth connecting shaft 54 ​​to move, but not to rotate, and ultimately causing the moving component 511 to reciprocate, so that the speed and other information can be detected by the detector 512. When the main transmission system fails, the detector 512 can be removed and the first transmission shaft 4 can be driven to rotate by moving the moving component 511.

[0015] Furthermore, the third transmission shaft 44 is also fixedly connected to a first bevel gear 441, the first bevel gear 441 is meshedly connected to a second bevel gear 442, the second bevel gear 442 is fixedly connected to a third rotating shaft 443 extending out of the housing 1 and rotatably connected to the housing 1, and the third rotating shaft 443 is also fixedly connected to a handwheel 444; The main transmission system is an automatic transmission system and may fail. At the same time, it is not suitable to start the main transmission system and the auxiliary transmission system during inspection and maintenance. Therefore, a handwheel 444 is provided for manually controlling the valve.

[0016] Furthermore, the first bevel gear 441 is meshedly connected to a third bevel gear 445, and the third bevel gear 445 is fixedly connected to a fourth rotating shaft 446 rotatably connected to the housing 1. The fourth rotating shaft 446 is fixedly connected to a wheel 447, and the wheel 447 is provided with a plurality of first jacks 448. The housing 1 is further provided with second jacks 6 arranged corresponding to the first jacks 448. A pin can be used to insert into the first socket 448 and the second socket 6, thereby locking the valve.

[0017] The foregoing description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the foregoing embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention, as known to those skilled in the art, should also be considered within the scope of protection of the present invention.

Claims

1. An actuator, characterized in that: The invention comprises a housing (1), wherein the housing (1) is fixedly connected to a protective sleeve (2) and an electric control cylinder (3), wherein the protective sleeve (2) is slidably connected to a first connecting shaft (21) connected to the electric control cylinder (3), wherein the first connecting shaft (21) is connected to a first rotating connecting member (22), wherein the protective sleeve (2) is also fixedly connected to a first track (23) for controlling the first rotating connecting member (22) to move only in a horizontal direction, wherein the first rotating connecting member (22) is connected to a second rotating connecting member (24), wherein the second rotating connecting member (24) is connected to a second connecting shaft (25), wherein the second connecting shaft (25) is connected to a first rotating member (26), wherein the housing (1) is also rotatably connected to a first transmission shaft (4), wherein the first transmission shaft (4) is fixedly connected to a first connecting block (41) in the form of a rectangular parallelepiped, The first connecting block (41) is fixedly connected to a second transmission shaft (42) rotatably connected to the first rotating member (26); the second transmission shaft (42) is fixedly connected to a second connecting block (43) in the form of a rectangular parallelepiped; the first connecting block (41) and the second connecting block (43) are symmetrically arranged; the second connecting block (43) is fixedly connected to a third transmission shaft (44) connected to the valve; and the first transmission shaft (4) and the third transmission shaft (44) are arranged on the same axis.

2. The actuator according to claim 1, characterized in that: The first connecting shaft (21) comprises a first rod body (211) and a second rod body (212); the first rod body (211) is fixedly connected to a first threaded rod (213) on the side facing the second rod body (212); the second rod body (212) is fixedly connected to a first threaded tube (214) for engaging with the first threaded rod (213) on the side facing the first rod body (211); the second rod body (212) is fixedly connected to a second threaded rod (215) on the side facing the first rotating connecting member (22); the first rotating connecting member (22) is fixedly connected to a second threaded tube (216) for engaging with the second threaded rod (215) on the side facing the second rod body (212); and the connection between the first rod body (211) and the second rod body (212) is arranged in the protective sleeve (2).

3. The actuator according to claim 1, characterized in that: The second rotating connecting member (24) is U-shaped and its bottom is fixedly connected to the second connecting shaft (25). The second rotating connecting member (24) is fixedly connected to the first rotating shaft (241) at one end away from the second connecting shaft (25). The first rotating connecting member (22) is provided with a first accommodating cavity (221) for accommodating the first rotating shaft (241).

4. The actuator according to claim 1, characterized in that: The first rotating member (26) is fixedly connected to a third threaded rod (261) on the side facing the second connecting shaft (25), and the second connecting shaft (25) is fixedly connected to a third threaded tube (262) for engaging with the third threaded rod (261) on the side facing the first rotating member (26).

5. The actuator according to claim 1, characterized in that: The housing (1) is further fixedly connected to a second track (5) fixedly connected to the protective sleeve (2); the second track (5) is slidably connected to a third connecting shaft (51); the third connecting shaft (51) is connected to a third rotating connecting member (52); the third rotating connecting member (52) is connected to a fourth rotating connecting member (53); the fourth rotating connecting member (53) is connected to a fourth connecting shaft (54); the fourth connecting shaft (54) is connected to a second rotating member (55); the second rotating member (55) is rotatably connected to a disk (56) fixedly connected to the first transmission shaft (4); the center line of the disk (56) is offset from the axis of the first transmission shaft (4).

6. An actuator according to claim 5, characterized in that: The third connecting shaft (51) is also threadedly connected to a moving member (511) that is slidably connected to the second track (5) and extends out of the housing (1). The moving member (511) is connected to a detector (512) located outside the housing (1).

7. The actuator according to claim 5, characterized in that: The third connecting shaft (51) is fixedly connected to a fourth threaded rod (513) on the side facing the third rotating connecting member (52); the third rotating connecting member (52) is fixedly connected to a fourth threaded tube (521) for meshing and connecting the fourth threaded rod (513) on the side facing the third connecting shaft (51); the fourth connecting shaft (54) is fixedly connected to a fifth threaded rod (541) on the side facing the fourth rotating connecting member (53); the fourth rotating connecting member (53) is fixedly connected to a fifth threaded tube (531) for meshing and connecting the fifth threaded rod (541) on the side facing the fourth connecting shaft (54); the fourth connecting shaft (54) is fixedly connected to a sixth threaded rod (542) on the side facing the second rotating member (55); and the second rotating member (55) is fixedly connected to a sixth threaded tube (551) for meshing and connecting the sixth threaded rod (542) on the side facing the fourth connecting shaft (54).

8. The actuator according to claim 5, characterized in that: The fourth rotating connection member (53) is fixedly connected to a second rotating shaft (532) at one end away from the fourth connecting shaft (54), and the third rotating connection member (52) is provided with a second accommodating cavity (522) for accommodating the second rotating shaft (532).

9. The actuator according to claim 1, characterized in that: The third transmission shaft (44) is also fixedly connected to a first bevel gear (441), the first bevel gear (441) is meshedly connected to a second bevel gear (442), the second bevel gear (442) is fixedly connected to a third rotating shaft (443) extending out of the housing (1) and rotatably connected to the housing (1), and the third rotating shaft (443) is also fixedly connected to a handwheel (444).

10. An actuator according to claim 9, characterized in that: The first bevel gear (441) is meshedly connected to a third bevel gear (445); the third bevel gear (445) is fixedly connected to a fourth rotating shaft (446) rotatably connected to the housing (1); the fourth rotating shaft (446) is fixedly connected to a wheel disc (447); the wheel disc (447) is provided with a plurality of first jacks (448); and the housing (1) is further provided with second jacks (6) arranged corresponding to the first jacks (448).

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