CN212272709U

CN212272709U - Angle stroke pneumatic actuator

Info

Publication number: CN212272709U
Application number: CN202020886635.7U
Authority: CN
Inventors: 黄清谅
Original assignee: Festo Valve Technology Zhejiang Co ltd
Current assignee: Festo Valve Technology Zhejiang Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-01-01
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses an angular travel pneumatic actuator, the key points of the technical proposal thereof comprise a cylinder body and an output gear shaft, the output gear shaft can rotate relative to the cylinder body, the cylinder body is provided with an attached cavity, an angle compensation device of the output gear shaft is arranged in the attached cavity, when the output gear shaft rotates, a fixed rod fixedly connected on the output gear shaft is driven to rotate, a slider which is supported on the inner wall of the attached cavity under the action of a spring sleeved on the fixed rod is driven to rotate along the inner wall of the attached cavity, and the spring can push the slider to be embedded in a groove along the inner wall of the groove in a sliding way; the utility model discloses an executor can utilize the spring to carry out the angular compensation of small range to the untight valve of closure that leads to using wearing and tearing after closing the valve, has avoided the valve to receive medium in the pipeline to erode for a long time, makes the valve local damage very fast, and the closure that arouses is inseparable.

Description

Angle stroke pneumatic actuator

Technical Field

The utility model relates to an executor, more specifically say that it relates to an angle stroke pneumatic actuator.

Background

The pneumatic actuator is an actuating device for opening and closing or regulating a valve by air pressure, is also called a pneumatic actuating mechanism or a pneumatic device, but is generally called a pneumatic head. Pneumatic actuators are sometimes also equipped with certain auxiliary devices. Commonly used valve positioners and hand wheel mechanisms. The valve positioner is used for improving the performance of the actuator by utilizing a feedback principle, so that the actuator can realize accurate positioning according to a control signal of the controller. The hand wheel mechanism is used for directly operating the control valve to maintain normal production when the control system has no power supply, no air supply, no output of the controller or failure of the actuating mechanism.

In the prior art, although the gear transmission is uniform, the rotating clearance is small, after the gear rack is worn and torn for a long time, the meshing clearance between the gears is too large, the valve cannot be opened or closed completely, the valve is subjected to different media scouring degrees in a pipeline, the local damage of the valve is fast, and the service life of the valve is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art exists, the utility model provides a pneumatic executor of angle stroke is equipped with angle compensation arrangement, can carry out spacingly and correct to the valve, realizes the full open-close pneumatic executor of angle stroke of valve through angle compensation arrangement.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an angular travel pneumatic actuator, includes cylinder body and output pinion, but output pinion sets up in the cylinder body and relative cylinder body rotation, its characterized in that: the cylinder body is also provided with an auxiliary cavity, an angle compensation device of the output gear shaft is arranged in the auxiliary cavity, the angle compensation device comprises a fixed rod fixedly connected with the output gear shaft and four sliding blocks which are sleeved with the fixed rod and can move relative to the fixed rod, a spring is also arranged between the sliding blocks and the output gear shaft, and the spring is sleeved outside the fixed rod;

the inner part of the auxiliary cavity is evenly distributed with four grooves which are matched and embedded with the sliding block, a transition surface is arranged between every two adjacent grooves, the surfaces of the sliding block, which are abutted against the inner wall of the auxiliary cavity, are spherical surfaces, when the output gear shaft rotates, the fixed rod is driven to rotate, the sliding block elastically abutted against the inner wall of the auxiliary cavity slides along the inner wall of the auxiliary cavity, and when the sliding block moves to the grooves, the springs can push the sliding block to be embedded in the grooves along the inner walls of the grooves.

As a further arrangement of the scheme, the sliding block further comprises a sliding surface and a supporting surface opposite to the sliding surface, a limiting sleeve is fixedly arranged on the supporting surface and is located between the spring and the fixing rod, and the fixing rod is in plug-in fit with the limiting sleeve.

As a further arrangement of the scheme, a fillet is arranged at the joint of the edge of the groove and the edge of the transition surface, and the sliding surface is matched with the groove.

As a further arrangement of the above scheme, the transition surface is a curved surface with the axis of the output gear shaft as a center.

Through the arrangement, the utility model discloses be provided with angle compensation device, through the recess and the slider of mutual gomphosis, based on the effort of spring and output pinion, the recess and the slider that utilize the gomphosis compensate to the output pinion angle of restoration of wearing and tearing and correct and rotate spacingly, have alleviateed the phenomenon that the door is not in place, increase of service life.

Drawings

FIG. 1 is a schematic sectional view of the structure of the present embodiment;

FIG. 2 is a schematic top view of the present embodiment fully open or fully closed;

FIG. 3 is a schematic top view of the present embodiment in a rotated state;

fig. 4 is a partially enlarged view of the embodiment a.

Reference numerals: 1. a cylinder body; 2. an output gear shaft; 3. an auxiliary cavity; 31. a groove; 32. a transition surface; 4. an angle compensation device; 41. fixing the rod; 42. a slider; 421. a sliding surface; 422. a support surface; 423. a limiting sleeve; 43. a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses an angular stroke pneumatic actuator, as shown in fig. 1-4, comprising a cylinder body 1 and an output gear shaft 2, wherein the output gear shaft 2 is arranged in the cylinder body 1 and can rotate relative to the cylinder body 1, and is characterized in that: the cylinder body 1 is further provided with an auxiliary cavity 3, an angle compensation device 4 of the output gear shaft 2 is arranged in the auxiliary cavity 3, the angle compensation device 4 comprises a fixed rod 41 fixedly connected with the output gear shaft 2 and a sliding block 42 which is sleeved with the fixed rod 41 and can move relative to the fixed rod 41, a spring 43 is further arranged between the sliding block 42 and the output gear shaft 2, and the spring 43 is sleeved outside the fixed rod 41;

four grooves 31 which are matched and embedded with the sliding blocks 42 are uniformly distributed in the auxiliary cavity 3, a transition surface 32 is arranged between each two adjacent grooves 31, the surfaces of the sliding blocks 42, which are abutted against the inner wall of the auxiliary cavity 3, are spherical surfaces, when the output gear shaft 2 rotates, the fixing rod 41 is driven to rotate, the sliding blocks 42 elastically abutted against the inner wall of the auxiliary cavity 3 slide along the inner wall of the auxiliary cavity 3, and when the sliding blocks 42 move to the grooves 31, the springs 43 can push the sliding blocks 42 to be embedded in the grooves 31 along the inner wall of the grooves 31.

As a further arrangement of the above scheme, the sliding block 42 further includes a sliding surface 421 and a supporting surface 422 opposite to the sliding surface 421, a limiting sleeve 423 is fixedly disposed on the supporting surface 422, the limiting sleeve 423 is located between the spring 43 and the fixing rod 41, and the fixing rod 41 is in plug-in fit with the limiting sleeve 423.

As a further arrangement of the above scheme, a fillet is arranged at the connection position of the edge of the groove 31 and the edge of the transition surface 32, and the sliding surface 421 is arranged in a manner of being matched with the groove 31.

As a further arrangement of the above solution, the transition surface 32 is a curved surface with the axial center of the output gear shaft 2 as the center.

In the angular travel pneumatic actuator, because the rack drives the output gear shaft 2 to rotate, but after long-time use, abrasion can be generated between the rack and the output gear shaft 2, so that the valve can not be completely closed or opened, the angle compensation device 4 is arranged on the side surface of the end part of the output gear shaft 2, when the angle compensation device 4 rotates to the guide surface 312, the spring 43 on the angle compensation device 4 can extrude the sliding block 42, and because the sliding block 42 is in line contact with the edge of the auxiliary cavity 3, the angle compensation device 4 can drive the output gear shaft 2 to transmit to the fixed point 311, when the contact point of the sliding block 42 and the edge of the auxiliary cavity 3 is superposed with the fixed point 311, the angle compensation device 4 and the output gear shaft 2 can not rotate any more, and the valve can be completely closed or opened.

In this embodiment, the output gear shaft 2 is provided with four angle compensation devices 4, the angle compensation devices 4 are circumferentially and uniformly distributed on the side surface of the tail end of the output gear shaft 2, the fixing rod 41 is vertically fixed on the side surface of the output gear shaft 2, the angle difference between two adjacent angle compensation devices 4 is 90 °, the force applied to the fixing rod 41 of the four uniformly distributed angle compensation devices 4 is arranged on the output gear shaft 2, the service life of the angle compensation devices 4 is prolonged, the angle difference of 90 ° can be reduced, the angle difference between a single angle and the opening and closing difference of a valve is the same, most of valves can be matched, the auxiliary cavity 3 comprises four grooves 31, the four grooves 31 are uniformly distributed on the edge of the auxiliary cavity 3, the angle difference between two adjacent grooves 31 is 90 °, so that the auxiliary cavity is matched with the angle compensation devices 4 to enable the valve to be fully closed or fully opened, the sliding block 42 further comprises a supporting surface 422 opposite, the supporting surface 422 is provided with a limiting sleeve 423 which can be sleeved on the fixing rod 41, the spring 43 is arranged between the supporting surface 422 and the output gear shaft 2, the slider 42 can be arranged in a sliding manner relative to the fixing rod 41 through the limiting sleeve 423, the slider 42 can be driven by the fixing rod 41 better to slide along the edge of the auxiliary cavity 3 through the limiting sleeve 423, the edge of the auxiliary cavity 3 can be arranged to prevent the slider 42 from being separated from the fixing rod 41, the spring 43 is abutted between the supporting surface 422 and the output gear shaft 2 to enable the slider 42 to be always abutted against the edge of the auxiliary cavity 3 during movement, the slider 42 can be driven to enable the output gear shaft 2 to rotate to the fixing point 311 when the slider 42 is positioned on the guide surface 312 to achieve the effect of angle compensation, the groove 31 is arranged to be a curved surface which is the same as the sliding surface 421, the sliding surface 421 and the groove 31 can be arranged in a superposed manner, the groove 31 at the edge of the, when the sliding block 42 is arranged on the guide surface 312 of the groove 31, the sliding surface 421 is in line contact with the guide surface 312, when the sliding surface 421 contacts with the fixed point 311, the sliding surface 421 can be overlapped with the groove 31, so that the sliding surface 421 and the groove 31 are in surface contact from line contact, the sliding block 42 is more reliable in edge contact with the auxiliary cavity 3, the position where the sliding block 42 stops is more accurate, the transition surface 32 is set to be a curved surface with the axis of the output gear shaft 2 as the center of a circle, and the fillet at the joint of the transition surface 32 and the groove 31 is arranged, so that when the sliding block 42 slides from the groove 31 to the transition surface 32, the sliding block can be smoother, the damage to the sliding surface 421 of the sliding block 42 can be reduced, and the service.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. An angular travel pneumatic actuator, includes cylinder body (1) and output gear shaft (2), output gear shaft (2) set up in cylinder body (1) and can rotate relative to cylinder body (1), its characterized in that: the cylinder body (1) is further provided with an auxiliary cavity (3), an angle compensation device (4) of the output gear shaft (2) is arranged in the auxiliary cavity (3), the angle compensation device (4) comprises a fixed rod (41) fixedly connected with the output gear shaft (2) and four sliding blocks (42) which are sleeved with the fixed rod (41) and can move relative to the fixed rod (41), a spring (43) is further arranged between each sliding block (42) and the output gear shaft (2), and the spring (43) is sleeved on the outer side of the fixed rod (41);

attach chamber (3) inside evenly distributed still four recess (31) with slider (42) looks adaptation gomphosis, still be provided with one transition face (32) between two adjacent recess (31) respectively, slider (42) and the face that attaches chamber (3) inner wall counterbalance are the sphere, drive dead lever (41) and rotate when output gear shaft (2) rotate, and elasticity supports slider (42) on attaching chamber (3) inner wall and slides along attaching chamber (3) inner wall, when slider (42) removed to recess (31), spring (43) can promote slider (42) along recess (31) inner wall gomphosis in recess (31).

2. The angular stroke pneumatic actuator of claim 1, wherein: the sliding block (42) further comprises a sliding surface (421) and a supporting surface (422) opposite to the sliding surface (421), a limiting sleeve (423) is fixedly arranged on the supporting surface (422), the limiting sleeve (423) is located between the spring (43) and the fixing rod (41), and the fixing rod (41) is in plug-in fit with the limiting sleeve (423).

3. The angular travel pneumatic actuator of claim 2, wherein: the connecting part of the edge of the groove (31) and the edge of the transition surface (32) is provided with a fillet, and the sliding surface (421) is matched with the groove (31).

4. The angular stroke pneumatic actuator of claim 1, wherein: the transition surface (32) is a curved surface taking the axis of the output gear shaft (2) as the center of a circle.