CN218455003U

CN218455003U - Pneumatic actuating mechanism

Info

Publication number: CN218455003U
Application number: CN202223096838.4U
Authority: CN
Inventors: 肖长松
Original assignee: Zhuzhou South General Electric Co ltd
Current assignee: Zhuzhou South General Electric Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-02-07
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses a pneumatic actuating mechanism, which comprises an air cylinder, wherein the air cylinder is arranged into a cube and is internally provided with a cylindrical air cavity, a hollow pipe is arranged on the air cylinder in a sealing and penetrating way, the middle section of the hollow pipe is arranged in the air cavity, short pipes communicated with the air cavity are arranged at the left end and the right end of the air cylinder, two piston pieces are symmetrically arranged at the two sides of the hollow pipe, the two piston pieces are arranged in the air cavity in a sliding and sealing way, a turntable is sleeved on the hollow pipe in a rotating way, and the two piston pieces are in transmission connection with the turntable; the actuating end, actuating end one end extends to in the hollow tube and is connected with the hollow tube coaxial rotation, still is provided with the carriage release lever in the hollow tube, is provided with magnetic transmission subassembly between carriage release lever and the carousel. The utility model discloses take the carriage release lever out and carry out manual or other mode drives after pneumatic actuator control system is out of order, do not influence and drive the execution end under the condition of pneumatic transmission structure, avoided the problem that reverse drive probably produced.

Description

Pneumatic actuating mechanism

Technical Field

The utility model relates to a pneumatic actuator technical field especially relates to a pneumatic actuator.

Background

The pneumatic actuator is an actuating device for opening and closing or adjusting a valve by air pressure drive, the pneumatic actuator is sometimes provided with a certain auxiliary device, a valve positioner and a hand wheel mechanism which are commonly used, wherein the hand wheel mechanism is used for directly operating a control valve by utilizing the pneumatic actuator when a control system has power failure or air cut, and the controller has no output or the actuating mechanism is out of order so as to maintain normal production, the hand wheel directly rotates with an actuating end of the pneumatic actuator, but the actuating end is driven by the movement of a piston piece, when the control system has power failure or air cut, and the controller has no output or the actuating mechanism is out of order, a hand wheel for manual operation needs to synchronously drive the piston piece to move, and the operation is difficult under the action of air pressure and friction force, and meanwhile, reverse transmission possibly causes damage to a transmission structure.

The patent document with the national application number of CN201920061819.7 discloses a pneumatic actuator, which comprises a pneumatic actuator, wherein the top surface of the pneumatic actuator is fixedly connected with a support column, the top surface of the support column is fixedly connected with a power box, the pneumatic actuator comprises a cylinder body, a piston rod, a cam, a rotating shaft and an adjusting screw rod, and the piston is connected to the inner wall of the cylinder body in a sliding manner; the device has additionally set up the electric drive structure to the structure of hand wheel, has realized the drive effect of two kinds of power supplies like this, but has additionally increased the electric drive structure and has leaded to overall structure to complicate, also does not solve the easy problem that appears of reverse drive.

Disclosure of Invention

The utility model aims at solving the defects existing in the prior art and providing a pneumatic actuating mechanism.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a pneumatic actuator comprising: the cylinder, the cylinder sets up to the cube just be provided with the air cavity of cylinder type in the cylinder, the sealed hollow tube that runs through on the cylinder is provided with, the hollow tube interlude sets up in the air cavity, both ends all are provided with the nozzle stub of intercommunication air cavity about the cylinder, the hollow tube bilateral symmetry is provided with two piston pieces, two the equal sliding seal of piston piece sets up in the air cavity, it is equipped with the carousel to rotate the cover on the hollow tube, two the piston piece all is connected with the carousel transmission.

The execution end, execution end one end extends to in the hollow tube and is connected with the hollow tube coaxial rotation, still be provided with the carriage release lever in the hollow tube, the carriage release lever is connected and can the relative slip with the execution end, be provided with magnetic drive subassembly between carriage release lever and the carousel.

And one end of the movable rod, which is far away from the execution end, is coaxially and fixedly connected with a rotating block.

Preferably, the turntable side wall is symmetrically provided with two slots, two transmission columns are arranged in the slots, the upper ends and the lower ends of the transmission columns are fixedly connected with connecting arms, and the connecting arms are fixedly connected with the piston piece.

Preferably, a reinforcing arm is fixedly connected between the two connecting arms.

Preferably, a prismatic cavity is arranged in the execution end, a sliding block is arranged in the prismatic cavity in a matching sliding mode, the movable rod penetrates through the execution end and is coaxially and fixedly connected with the sliding block, and a magnetic force adsorption structure is arranged between the sliding block and the execution end.

Preferably, the magnetic transmission assembly comprises an annular outer magnetic rotor embedded in the turntable, an annular inner magnetic rotor is coaxially and rotatably arranged in the hollow tube, a fluted disc is fixedly sleeved on the moving rod, and a tooth groove matched with the fluted disc is formed in the inner wall of the annular inner magnetic rotor.

Preferably, one end of the rotating block, which is far away from the moving rod, is provided with a circular groove, and a pull rod is fixedly arranged in the circular groove.

Compared with the prior art, the beneficial effects of the utility model are that: in the pneumatic actuating mechanism, the two piston pieces can drive the turntable to rotate after acting through pneumatic driving, the turntable and the moving rod are driven through the magnetic transmission assembly, and the moving rod and the actuating end can slide relative to each other but cannot rotate relative to each other, so that pneumatic actuating action is realized; when pneumatic actuator's control system goes wrong, pneumatic operation can't be carried out promptly, take the carriage release lever out from the hollow tube through the commentaries on classics piece, the fluted disc on the carriage release lever has broken away from interior magnet rotor this moment, there is not transmission effect between carriage release lever and the carousel, can continue to drive the execution end through the carriage release lever, can not influence the piston spare simultaneously, avoid back drive, avoid piston spare and atmospheric pressure effect to produce the hindrance to the drive of execution end, the structural damage that back drive probably leads to has also been avoided.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a schematic cross-sectional structure view of another view angle of the present invention.

In the figure: the device comprises a cylinder 1, an execution end 2, a hollow pipe 11, a short pipe 12, a piston 13, a turntable 14, a transmission column 15, a connecting arm 16, a reinforcing arm 17, a moving rod 21, a rotating block 22, a sliding block 23, a pull rod 24, an annular outer magnetic rotor 31, an annular inner magnetic rotor 32 and a fluted disc 33.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

1-3, a pneumatic actuator comprising:

cylinder 1 as overall structure shell, cylinder 1 sets up to be provided with the air cavity of cylinder type in cube and cylinder 1, different with current pneumatic actuator, it is provided with hollow tube 11 to seal on the cylinder 1, 11 interlude settings of hollow tube are in the air cavity, both ends all are provided with the nozzle stub 12 of intercommunication air cavity about cylinder 1, nozzle stub 12 is used for letting in or take out gas, 11 bilateral symmetry of hollow tube is provided with two piston spare 13, two piston spare 13 all slide seal and set up in the air cavity, it is equipped with carousel 14 to rotate the cover on hollow tube 11, two piston spare 13 all are connected with 14 transmissions of carousel, it can drive two piston spare 13 and remove to let in gas, the gas pocket through additionally setting up intercommunication air cavity on cylinder 1 can be to letting in gas between two piston spare 13, thereby realize driving carousel 14 and rotate, there is more applications in prior art, do not giving unnecessary here details, specific transmission structure is as follows: the symmetry is provided with two flutings on the 14 lateral walls of carousel, all be provided with transmission post 15 in two flutings, the equal fixedly connected with linking arm 16 in both ends about transmission post 15, can drive transmission post 15 through two linking arms 16 when piston piece 13 removes and remove, promote the rotation to carousel 14 when transmission post 15 removes, two linking arms 16 all with piston piece 13 fixed connection, in order to guarantee the transmission steadiness of two linking arms 16, fixedly connected with strengthens arm 17 between two linking arms 16.

In order to meet the pneumatic execution effect, the execution mechanism is also provided with an execution end 2, when the execution mechanism is different from the existing pneumatic execution mechanism, one end of the execution end 2 extends into the hollow tube 11 and is coaxially and rotatably connected with the hollow tube 11, a movable rod 21 is further arranged in the hollow tube 11, the movable rod 21 is connected with the execution end 2 and can slide relatively, a prismatic cavity is arranged in the execution end 2, a sliding block 23 is arranged in the prismatic cavity in a matched sliding manner, the movable rod 21 penetrates through the execution end 2 and is coaxially and fixedly connected with the sliding block 23, the movable rod 21 and the execution end 2 can slide relatively but cannot rotate relatively, namely, the movable rod 21 and the execution end 2 rotate coaxially, a magnetic adsorption structure is arranged between the sliding block 23 and the execution end 2, and an existing permanent magnetic structure is adopted to play a certain limiting role; in order to realize that the piston piece 13 moves to drive the actuating end 2 to rotate, a magnetic transmission assembly is arranged between the moving rod 21 and the rotating disc 14, the magnetic transmission assembly comprises an annular outer magnetic rotor 31 embedded in the rotating disc 14, an annular inner magnetic rotor 32 is coaxially and rotatably arranged in the hollow tube 11, a fluted disc 33 is fixedly sleeved on the moving rod 21, a tooth groove matched with the fluted disc 33 is formed in the inner wall of the annular inner magnetic rotor 32, the rotating disc 14 is driven to rotate when the piston piece 13 moves, the rotating disc 14 rotates to drive the annular inner magnetic rotor 32 to rotate through the magnetic coupling effect, then the moving rod 21 is driven to rotate by the effect between the fluted disc 33 and the tooth groove, and finally the rotation of the actuating end 2 is realized.

The coaxial fixedly connected with commentaries on classics piece 22 is kept away from the one end of execution end 2 at the movable rod 21, and the one end that commentaries on classics piece 22 kept away from movable rod 21 is provided with circular recess, and the circular recess internal fixation is provided with pull rod 24, when pneumatic actuator's control system goes wrong, outwards takes movable rod 21 out through pull rod 24 for fluted disc 33 deviates from annular interior magnet rotor 32, can not influence carousel 14 and piston piece 13 when driving execution end 2 through movable rod 21.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims

1. A pneumatic actuator, comprising:

the air cylinder (1) is arranged to be a cube, a cylindrical air cavity is arranged in the air cylinder (1), a hollow pipe (11) penetrates through the air cylinder (1) in a sealing mode, the middle section of the hollow pipe (11) is arranged in the air cavity, short pipes (12) communicated with the air cavity are arranged at the left end and the right end of the air cylinder (1), two piston pieces (13) are symmetrically arranged on two sides of the hollow pipe (11), the two piston pieces (13) are arranged in the air cavity in a sliding and sealing mode, a rotary table (14) is sleeved on the hollow pipe (11) in a rotating mode, and the two piston pieces (13) are in transmission connection with the rotary table (14);

one end of the execution end (2) extends into the hollow tube (11) and is coaxially and rotatably connected with the hollow tube (11), a moving rod (21) is further arranged in the hollow tube (11), the moving rod (21) is connected with the execution end (2) and can slide relatively, and a magnetic transmission assembly is arranged between the moving rod (21) and the turntable (14);

and one end of the moving rod (21) far away from the execution end (2) is coaxially and fixedly connected with a rotating block (22).

2. The pneumatic actuator according to claim 1, wherein the side wall of the rotary table (14) is symmetrically provided with two slots, a transmission column (15) is arranged in each of the two slots, the upper end and the lower end of the transmission column (15) are fixedly connected with connecting arms (16), and each of the two connecting arms (16) is fixedly connected with the piston member (13).

3. A pneumatic actuator according to claim 2, wherein a reinforcing arm (17) is fixedly connected between the two connecting arms (16).

4. The pneumatic actuator according to claim 1, characterized in that a prismatic cavity is arranged in the actuating end (2), a sliding block (23) is arranged in the prismatic cavity in a matching and sliding manner, the moving rod (21) penetrates through the actuating end (2) and is fixedly connected with the sliding block (23) coaxially, and a magnetic force adsorption structure is arranged between the sliding block (23) and the actuating end (2).

5. The pneumatic actuator according to claim 1, wherein the magnetic transmission assembly comprises an annular outer magnetic rotor (31) embedded in the turntable (14), an annular inner magnetic rotor (32) is coaxially and rotatably arranged in the hollow tube (11), a fluted disc (33) is fixedly sleeved on the moving rod (21), and a tooth groove matched with the fluted disc (33) is formed in the inner wall of the annular inner magnetic rotor (32).

6. Pneumatic actuator according to claim 1, wherein the end of the rotary block (22) remote from the moving rod (21) is provided with a circular groove, and a pull rod (24) is fixedly arranged in the circular groove.